+++ /dev/null
-/*
- * Serial port driver for the ETRAX 100LX chip
- *
- * Copyright (C) 1998-2007 Axis Communications AB
- *
- * Many, many authors. Based once upon a time on serial.c for 16x50.
- *
- */
-
-static char *serial_version = "$Revision: 1.25 $";
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/mutex.h>
-#include <linux/bitops.h>
-#include <linux/seq_file.h>
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/uaccess.h>
-#include <linux/io.h>
-
-#include <asm/irq.h>
-#include <asm/dma.h>
-#include <asm/system.h>
-
-#include <arch/svinto.h>
-
-/* non-arch dependent serial structures are in linux/serial.h */
-#include <linux/serial.h>
-/* while we keep our own stuff (struct e100_serial) in a local .h file */
-#include "crisv10.h"
-#include <asm/fasttimer.h>
-#include <arch/io_interface_mux.h>
-
-#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
-#ifndef CONFIG_ETRAX_FAST_TIMER
-#error "Enable FAST_TIMER to use SERIAL_FAST_TIMER"
-#endif
-#endif
-
-#if defined(CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS) && \
- (CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS == 0)
-#error "RX_TIMEOUT_TICKS == 0 not allowed, use 1"
-#endif
-
-#if defined(CONFIG_ETRAX_RS485_ON_PA) && defined(CONFIG_ETRAX_RS485_ON_PORT_G)
-#error "Disable either CONFIG_ETRAX_RS485_ON_PA or CONFIG_ETRAX_RS485_ON_PORT_G"
-#endif
-
-/*
- * All of the compatibilty code so we can compile serial.c against
- * older kernels is hidden in serial_compat.h
- */
-#if defined(LOCAL_HEADERS)
-#include "serial_compat.h"
-#endif
-
-struct tty_driver *serial_driver;
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-//#define SERIAL_DEBUG_INTR
-//#define SERIAL_DEBUG_OPEN
-//#define SERIAL_DEBUG_FLOW
-//#define SERIAL_DEBUG_DATA
-//#define SERIAL_DEBUG_THROTTLE
-//#define SERIAL_DEBUG_IO /* Debug for Extra control and status pins */
-//#define SERIAL_DEBUG_LINE 0 /* What serport we want to debug */
-
-/* Enable this to use serial interrupts to handle when you
- expect the first received event on the serial port to
- be an error, break or similar. Used to be able to flash IRMA
- from eLinux */
-#define SERIAL_HANDLE_EARLY_ERRORS
-
-/* Currently 16 descriptors x 128 bytes = 2048 bytes */
-#define SERIAL_DESCR_BUF_SIZE 256
-
-#define SERIAL_PRESCALE_BASE 3125000 /* 3.125MHz */
-#define DEF_BAUD_BASE SERIAL_PRESCALE_BASE
-
-/* We don't want to load the system with massive fast timer interrupt
- * on high baudrates so limit it to 250 us (4kHz) */
-#define MIN_FLUSH_TIME_USEC 250
-
-/* Add an x here to log a lot of timer stuff */
-#define TIMERD(x)
-/* Debug details of interrupt handling */
-#define DINTR1(x) /* irq on/off, errors */
-#define DINTR2(x) /* tx and rx */
-/* Debug flip buffer stuff */
-#define DFLIP(x)
-/* Debug flow control and overview of data flow */
-#define DFLOW(x)
-#define DBAUD(x)
-#define DLOG_INT_TRIG(x)
-
-//#define DEBUG_LOG_INCLUDED
-#ifndef DEBUG_LOG_INCLUDED
-#define DEBUG_LOG(line, string, value)
-#else
-struct debug_log_info
-{
- unsigned long time;
- unsigned long timer_data;
-// int line;
- const char *string;
- int value;
-};
-#define DEBUG_LOG_SIZE 4096
-
-struct debug_log_info debug_log[DEBUG_LOG_SIZE];
-int debug_log_pos = 0;
-
-#define DEBUG_LOG(_line, _string, _value) do { \
- if ((_line) == SERIAL_DEBUG_LINE) {\
- debug_log_func(_line, _string, _value); \
- }\
-}while(0)
-
-void debug_log_func(int line, const char *string, int value)
-{
- if (debug_log_pos < DEBUG_LOG_SIZE) {
- debug_log[debug_log_pos].time = jiffies;
- debug_log[debug_log_pos].timer_data = *R_TIMER_DATA;
-// debug_log[debug_log_pos].line = line;
- debug_log[debug_log_pos].string = string;
- debug_log[debug_log_pos].value = value;
- debug_log_pos++;
- }
- /*printk(string, value);*/
-}
-#endif
-
-#ifndef CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS
-/* Default number of timer ticks before flushing rx fifo
- * When using "little data, low latency applications: use 0
- * When using "much data applications (PPP)" use ~5
- */
-#define CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS 5
-#endif
-
-unsigned long timer_data_to_ns(unsigned long timer_data);
-
-static void change_speed(struct e100_serial *info);
-static void rs_throttle(struct tty_struct * tty);
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
-static int rs_write(struct tty_struct *tty,
- const unsigned char *buf, int count);
-#ifdef CONFIG_ETRAX_RS485
-static int e100_write_rs485(struct tty_struct *tty,
- const unsigned char *buf, int count);
-#endif
-static int get_lsr_info(struct e100_serial *info, unsigned int *value);
-
-
-#define DEF_BAUD 115200 /* 115.2 kbit/s */
-#define STD_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
-#define DEF_RX 0x20 /* or SERIAL_CTRL_W >> 8 */
-/* Default value of tx_ctrl register: has txd(bit 7)=1 (idle) as default */
-#define DEF_TX 0x80 /* or SERIAL_CTRL_B */
-
-/* offsets from R_SERIALx_CTRL */
-
-#define REG_DATA 0
-#define REG_DATA_STATUS32 0 /* this is the 32 bit register R_SERIALx_READ */
-#define REG_TR_DATA 0
-#define REG_STATUS 1
-#define REG_TR_CTRL 1
-#define REG_REC_CTRL 2
-#define REG_BAUD 3
-#define REG_XOFF 4 /* this is a 32 bit register */
-
-/* The bitfields are the same for all serial ports */
-#define SER_RXD_MASK IO_MASK(R_SERIAL0_STATUS, rxd)
-#define SER_DATA_AVAIL_MASK IO_MASK(R_SERIAL0_STATUS, data_avail)
-#define SER_FRAMING_ERR_MASK IO_MASK(R_SERIAL0_STATUS, framing_err)
-#define SER_PAR_ERR_MASK IO_MASK(R_SERIAL0_STATUS, par_err)
-#define SER_OVERRUN_MASK IO_MASK(R_SERIAL0_STATUS, overrun)
-
-#define SER_ERROR_MASK (SER_OVERRUN_MASK | SER_PAR_ERR_MASK | SER_FRAMING_ERR_MASK)
-
-/* Values for info->errorcode */
-#define ERRCODE_SET_BREAK (TTY_BREAK)
-#define ERRCODE_INSERT 0x100
-#define ERRCODE_INSERT_BREAK (ERRCODE_INSERT | TTY_BREAK)
-
-#define FORCE_EOP(info) *R_SET_EOP = 1U << info->iseteop;
-
-/*
- * General note regarding the use of IO_* macros in this file:
- *
- * We will use the bits defined for DMA channel 6 when using various
- * IO_* macros (e.g. IO_STATE, IO_MASK, IO_EXTRACT) and _assume_ they are
- * the same for all channels (which of course they are).
- *
- * We will also use the bits defined for serial port 0 when writing commands
- * to the different ports, as these bits too are the same for all ports.
- */
-
-
-/* Mask for the irqs possibly enabled in R_IRQ_MASK1_RD etc. */
-static const unsigned long e100_ser_int_mask = 0
-#ifdef CONFIG_ETRAX_SERIAL_PORT0
-| IO_MASK(R_IRQ_MASK1_RD, ser0_data) | IO_MASK(R_IRQ_MASK1_RD, ser0_ready)
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT1
-| IO_MASK(R_IRQ_MASK1_RD, ser1_data) | IO_MASK(R_IRQ_MASK1_RD, ser1_ready)
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
-| IO_MASK(R_IRQ_MASK1_RD, ser2_data) | IO_MASK(R_IRQ_MASK1_RD, ser2_ready)
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT3
-| IO_MASK(R_IRQ_MASK1_RD, ser3_data) | IO_MASK(R_IRQ_MASK1_RD, ser3_ready)
-#endif
-;
-unsigned long r_alt_ser_baudrate_shadow = 0;
-
-/* this is the data for the four serial ports in the etrax100 */
-/* DMA2(ser2), DMA4(ser3), DMA6(ser0) or DMA8(ser1) */
-/* R_DMA_CHx_CLR_INTR, R_DMA_CHx_FIRST, R_DMA_CHx_CMD */
-
-static struct e100_serial rs_table[] = {
- { .baud = DEF_BAUD,
- .ioport = (unsigned char *)R_SERIAL0_CTRL,
- .irq = 1U << 12, /* uses DMA 6 and 7 */
- .oclrintradr = R_DMA_CH6_CLR_INTR,
- .ofirstadr = R_DMA_CH6_FIRST,
- .ocmdadr = R_DMA_CH6_CMD,
- .ostatusadr = R_DMA_CH6_STATUS,
- .iclrintradr = R_DMA_CH7_CLR_INTR,
- .ifirstadr = R_DMA_CH7_FIRST,
- .icmdadr = R_DMA_CH7_CMD,
- .idescradr = R_DMA_CH7_DESCR,
- .flags = STD_FLAGS,
- .rx_ctrl = DEF_RX,
- .tx_ctrl = DEF_TX,
- .iseteop = 2,
- .dma_owner = dma_ser0,
- .io_if = if_serial_0,
-#ifdef CONFIG_ETRAX_SERIAL_PORT0
- .enabled = 1,
-#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
- .dma_out_enabled = 1,
- .dma_out_nbr = SER0_TX_DMA_NBR,
- .dma_out_irq_nbr = SER0_DMA_TX_IRQ_NBR,
- .dma_out_irq_flags = IRQF_DISABLED,
- .dma_out_irq_description = "serial 0 dma tr",
-#else
- .dma_out_enabled = 0,
- .dma_out_nbr = UINT_MAX,
- .dma_out_irq_nbr = 0,
- .dma_out_irq_flags = 0,
- .dma_out_irq_description = NULL,
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
- .dma_in_enabled = 1,
- .dma_in_nbr = SER0_RX_DMA_NBR,
- .dma_in_irq_nbr = SER0_DMA_RX_IRQ_NBR,
- .dma_in_irq_flags = IRQF_DISABLED,
- .dma_in_irq_description = "serial 0 dma rec",
-#else
- .dma_in_enabled = 0,
- .dma_in_nbr = UINT_MAX,
- .dma_in_irq_nbr = 0,
- .dma_in_irq_flags = 0,
- .dma_in_irq_description = NULL,
-#endif
-#else
- .enabled = 0,
- .io_if_description = NULL,
- .dma_out_enabled = 0,
- .dma_in_enabled = 0
-#endif
-
-}, /* ttyS0 */
-#ifndef CONFIG_SVINTO_SIM
- { .baud = DEF_BAUD,
- .ioport = (unsigned char *)R_SERIAL1_CTRL,
- .irq = 1U << 16, /* uses DMA 8 and 9 */
- .oclrintradr = R_DMA_CH8_CLR_INTR,
- .ofirstadr = R_DMA_CH8_FIRST,
- .ocmdadr = R_DMA_CH8_CMD,
- .ostatusadr = R_DMA_CH8_STATUS,
- .iclrintradr = R_DMA_CH9_CLR_INTR,
- .ifirstadr = R_DMA_CH9_FIRST,
- .icmdadr = R_DMA_CH9_CMD,
- .idescradr = R_DMA_CH9_DESCR,
- .flags = STD_FLAGS,
- .rx_ctrl = DEF_RX,
- .tx_ctrl = DEF_TX,
- .iseteop = 3,
- .dma_owner = dma_ser1,
- .io_if = if_serial_1,
-#ifdef CONFIG_ETRAX_SERIAL_PORT1
- .enabled = 1,
- .io_if_description = "ser1",
-#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA8_OUT
- .dma_out_enabled = 1,
- .dma_out_nbr = SER1_TX_DMA_NBR,
- .dma_out_irq_nbr = SER1_DMA_TX_IRQ_NBR,
- .dma_out_irq_flags = IRQF_DISABLED,
- .dma_out_irq_description = "serial 1 dma tr",
-#else
- .dma_out_enabled = 0,
- .dma_out_nbr = UINT_MAX,
- .dma_out_irq_nbr = 0,
- .dma_out_irq_flags = 0,
- .dma_out_irq_description = NULL,
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA9_IN
- .dma_in_enabled = 1,
- .dma_in_nbr = SER1_RX_DMA_NBR,
- .dma_in_irq_nbr = SER1_DMA_RX_IRQ_NBR,
- .dma_in_irq_flags = IRQF_DISABLED,
- .dma_in_irq_description = "serial 1 dma rec",
-#else
- .dma_in_enabled = 0,
- .dma_in_enabled = 0,
- .dma_in_nbr = UINT_MAX,
- .dma_in_irq_nbr = 0,
- .dma_in_irq_flags = 0,
- .dma_in_irq_description = NULL,
-#endif
-#else
- .enabled = 0,
- .io_if_description = NULL,
- .dma_in_irq_nbr = 0,
- .dma_out_enabled = 0,
- .dma_in_enabled = 0
-#endif
-}, /* ttyS1 */
-
- { .baud = DEF_BAUD,
- .ioport = (unsigned char *)R_SERIAL2_CTRL,
- .irq = 1U << 4, /* uses DMA 2 and 3 */
- .oclrintradr = R_DMA_CH2_CLR_INTR,
- .ofirstadr = R_DMA_CH2_FIRST,
- .ocmdadr = R_DMA_CH2_CMD,
- .ostatusadr = R_DMA_CH2_STATUS,
- .iclrintradr = R_DMA_CH3_CLR_INTR,
- .ifirstadr = R_DMA_CH3_FIRST,
- .icmdadr = R_DMA_CH3_CMD,
- .idescradr = R_DMA_CH3_DESCR,
- .flags = STD_FLAGS,
- .rx_ctrl = DEF_RX,
- .tx_ctrl = DEF_TX,
- .iseteop = 0,
- .dma_owner = dma_ser2,
- .io_if = if_serial_2,
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
- .enabled = 1,
- .io_if_description = "ser2",
-#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
- .dma_out_enabled = 1,
- .dma_out_nbr = SER2_TX_DMA_NBR,
- .dma_out_irq_nbr = SER2_DMA_TX_IRQ_NBR,
- .dma_out_irq_flags = IRQF_DISABLED,
- .dma_out_irq_description = "serial 2 dma tr",
-#else
- .dma_out_enabled = 0,
- .dma_out_nbr = UINT_MAX,
- .dma_out_irq_nbr = 0,
- .dma_out_irq_flags = 0,
- .dma_out_irq_description = NULL,
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
- .dma_in_enabled = 1,
- .dma_in_nbr = SER2_RX_DMA_NBR,
- .dma_in_irq_nbr = SER2_DMA_RX_IRQ_NBR,
- .dma_in_irq_flags = IRQF_DISABLED,
- .dma_in_irq_description = "serial 2 dma rec",
-#else
- .dma_in_enabled = 0,
- .dma_in_nbr = UINT_MAX,
- .dma_in_irq_nbr = 0,
- .dma_in_irq_flags = 0,
- .dma_in_irq_description = NULL,
-#endif
-#else
- .enabled = 0,
- .io_if_description = NULL,
- .dma_out_enabled = 0,
- .dma_in_enabled = 0
-#endif
- }, /* ttyS2 */
-
- { .baud = DEF_BAUD,
- .ioport = (unsigned char *)R_SERIAL3_CTRL,
- .irq = 1U << 8, /* uses DMA 4 and 5 */
- .oclrintradr = R_DMA_CH4_CLR_INTR,
- .ofirstadr = R_DMA_CH4_FIRST,
- .ocmdadr = R_DMA_CH4_CMD,
- .ostatusadr = R_DMA_CH4_STATUS,
- .iclrintradr = R_DMA_CH5_CLR_INTR,
- .ifirstadr = R_DMA_CH5_FIRST,
- .icmdadr = R_DMA_CH5_CMD,
- .idescradr = R_DMA_CH5_DESCR,
- .flags = STD_FLAGS,
- .rx_ctrl = DEF_RX,
- .tx_ctrl = DEF_TX,
- .iseteop = 1,
- .dma_owner = dma_ser3,
- .io_if = if_serial_3,
-#ifdef CONFIG_ETRAX_SERIAL_PORT3
- .enabled = 1,
- .io_if_description = "ser3",
-#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA4_OUT
- .dma_out_enabled = 1,
- .dma_out_nbr = SER3_TX_DMA_NBR,
- .dma_out_irq_nbr = SER3_DMA_TX_IRQ_NBR,
- .dma_out_irq_flags = IRQF_DISABLED,
- .dma_out_irq_description = "serial 3 dma tr",
-#else
- .dma_out_enabled = 0,
- .dma_out_nbr = UINT_MAX,
- .dma_out_irq_nbr = 0,
- .dma_out_irq_flags = 0,
- .dma_out_irq_description = NULL,
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA5_IN
- .dma_in_enabled = 1,
- .dma_in_nbr = SER3_RX_DMA_NBR,
- .dma_in_irq_nbr = SER3_DMA_RX_IRQ_NBR,
- .dma_in_irq_flags = IRQF_DISABLED,
- .dma_in_irq_description = "serial 3 dma rec",
-#else
- .dma_in_enabled = 0,
- .dma_in_nbr = UINT_MAX,
- .dma_in_irq_nbr = 0,
- .dma_in_irq_flags = 0,
- .dma_in_irq_description = NULL
-#endif
-#else
- .enabled = 0,
- .io_if_description = NULL,
- .dma_out_enabled = 0,
- .dma_in_enabled = 0
-#endif
- } /* ttyS3 */
-#endif
-};
-
-
-#define NR_PORTS (sizeof(rs_table)/sizeof(struct e100_serial))
-
-#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
-static struct fast_timer fast_timers[NR_PORTS];
-#endif
-
-#ifdef CONFIG_ETRAX_SERIAL_PROC_ENTRY
-#define PROCSTAT(x) x
-struct ser_statistics_type {
- int overrun_cnt;
- int early_errors_cnt;
- int ser_ints_ok_cnt;
- int errors_cnt;
- unsigned long int processing_flip;
- unsigned long processing_flip_still_room;
- unsigned long int timeout_flush_cnt;
- int rx_dma_ints;
- int tx_dma_ints;
- int rx_tot;
- int tx_tot;
-};
-
-static struct ser_statistics_type ser_stat[NR_PORTS];
-
-#else
-
-#define PROCSTAT(x)
-
-#endif /* CONFIG_ETRAX_SERIAL_PROC_ENTRY */
-
-/* RS-485 */
-#if defined(CONFIG_ETRAX_RS485)
-#ifdef CONFIG_ETRAX_FAST_TIMER
-static struct fast_timer fast_timers_rs485[NR_PORTS];
-#endif
-#if defined(CONFIG_ETRAX_RS485_ON_PA)
-static int rs485_pa_bit = CONFIG_ETRAX_RS485_ON_PA_BIT;
-#endif
-#if defined(CONFIG_ETRAX_RS485_ON_PORT_G)
-static int rs485_port_g_bit = CONFIG_ETRAX_RS485_ON_PORT_G_BIT;
-#endif
-#endif
-
-/* Info and macros needed for each ports extra control/status signals. */
-#define E100_STRUCT_PORT(line, pinname) \
- ((CONFIG_ETRAX_SER##line##_##pinname##_ON_PA_BIT >= 0)? \
- (R_PORT_PA_DATA): ( \
- (CONFIG_ETRAX_SER##line##_##pinname##_ON_PB_BIT >= 0)? \
- (R_PORT_PB_DATA):&dummy_ser[line]))
-
-#define E100_STRUCT_SHADOW(line, pinname) \
- ((CONFIG_ETRAX_SER##line##_##pinname##_ON_PA_BIT >= 0)? \
- (&port_pa_data_shadow): ( \
- (CONFIG_ETRAX_SER##line##_##pinname##_ON_PB_BIT >= 0)? \
- (&port_pb_data_shadow):&dummy_ser[line]))
-#define E100_STRUCT_MASK(line, pinname) \
- ((CONFIG_ETRAX_SER##line##_##pinname##_ON_PA_BIT >= 0)? \
- (1<<CONFIG_ETRAX_SER##line##_##pinname##_ON_PA_BIT): ( \
- (CONFIG_ETRAX_SER##line##_##pinname##_ON_PB_BIT >= 0)? \
- (1<<CONFIG_ETRAX_SER##line##_##pinname##_ON_PB_BIT):DUMMY_##pinname##_MASK))
-
-#define DUMMY_DTR_MASK 1
-#define DUMMY_RI_MASK 2
-#define DUMMY_DSR_MASK 4
-#define DUMMY_CD_MASK 8
-static unsigned char dummy_ser[NR_PORTS] = {0xFF, 0xFF, 0xFF,0xFF};
-
-/* If not all status pins are used or disabled, use mixed mode */
-#ifdef CONFIG_ETRAX_SERIAL_PORT0
-
-#define SER0_PA_BITSUM (CONFIG_ETRAX_SER0_DTR_ON_PA_BIT+CONFIG_ETRAX_SER0_RI_ON_PA_BIT+CONFIG_ETRAX_SER0_DSR_ON_PA_BIT+CONFIG_ETRAX_SER0_CD_ON_PA_BIT)
-
-#if SER0_PA_BITSUM != -4
-# if CONFIG_ETRAX_SER0_DTR_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER0_RI_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER0_DSR_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER0_CD_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-#endif
-
-#define SER0_PB_BITSUM (CONFIG_ETRAX_SER0_DTR_ON_PB_BIT+CONFIG_ETRAX_SER0_RI_ON_PB_BIT+CONFIG_ETRAX_SER0_DSR_ON_PB_BIT+CONFIG_ETRAX_SER0_CD_ON_PB_BIT)
-
-#if SER0_PB_BITSUM != -4
-# if CONFIG_ETRAX_SER0_DTR_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER0_RI_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER0_DSR_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER0_CD_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-#endif
-
-#endif /* PORT0 */
-
-
-#ifdef CONFIG_ETRAX_SERIAL_PORT1
-
-#define SER1_PA_BITSUM (CONFIG_ETRAX_SER1_DTR_ON_PA_BIT+CONFIG_ETRAX_SER1_RI_ON_PA_BIT+CONFIG_ETRAX_SER1_DSR_ON_PA_BIT+CONFIG_ETRAX_SER1_CD_ON_PA_BIT)
-
-#if SER1_PA_BITSUM != -4
-# if CONFIG_ETRAX_SER1_DTR_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER1_RI_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER1_DSR_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER1_CD_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-#endif
-
-#define SER1_PB_BITSUM (CONFIG_ETRAX_SER1_DTR_ON_PB_BIT+CONFIG_ETRAX_SER1_RI_ON_PB_BIT+CONFIG_ETRAX_SER1_DSR_ON_PB_BIT+CONFIG_ETRAX_SER1_CD_ON_PB_BIT)
-
-#if SER1_PB_BITSUM != -4
-# if CONFIG_ETRAX_SER1_DTR_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER1_RI_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER1_DSR_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER1_CD_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-#endif
-
-#endif /* PORT1 */
-
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
-
-#define SER2_PA_BITSUM (CONFIG_ETRAX_SER2_DTR_ON_PA_BIT+CONFIG_ETRAX_SER2_RI_ON_PA_BIT+CONFIG_ETRAX_SER2_DSR_ON_PA_BIT+CONFIG_ETRAX_SER2_CD_ON_PA_BIT)
-
-#if SER2_PA_BITSUM != -4
-# if CONFIG_ETRAX_SER2_DTR_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER2_RI_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER2_DSR_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER2_CD_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-#endif
-
-#define SER2_PB_BITSUM (CONFIG_ETRAX_SER2_DTR_ON_PB_BIT+CONFIG_ETRAX_SER2_RI_ON_PB_BIT+CONFIG_ETRAX_SER2_DSR_ON_PB_BIT+CONFIG_ETRAX_SER2_CD_ON_PB_BIT)
-
-#if SER2_PB_BITSUM != -4
-# if CONFIG_ETRAX_SER2_DTR_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER2_RI_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER2_DSR_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER2_CD_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-#endif
-
-#endif /* PORT2 */
-
-#ifdef CONFIG_ETRAX_SERIAL_PORT3
-
-#define SER3_PA_BITSUM (CONFIG_ETRAX_SER3_DTR_ON_PA_BIT+CONFIG_ETRAX_SER3_RI_ON_PA_BIT+CONFIG_ETRAX_SER3_DSR_ON_PA_BIT+CONFIG_ETRAX_SER3_CD_ON_PA_BIT)
-
-#if SER3_PA_BITSUM != -4
-# if CONFIG_ETRAX_SER3_DTR_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER3_RI_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER3_DSR_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER3_CD_ON_PA_BIT == -1
-# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-#endif
-
-#define SER3_PB_BITSUM (CONFIG_ETRAX_SER3_DTR_ON_PB_BIT+CONFIG_ETRAX_SER3_RI_ON_PB_BIT+CONFIG_ETRAX_SER3_DSR_ON_PB_BIT+CONFIG_ETRAX_SER3_CD_ON_PB_BIT)
-
-#if SER3_PB_BITSUM != -4
-# if CONFIG_ETRAX_SER3_DTR_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER3_RI_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER3_DSR_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-# if CONFIG_ETRAX_SER3_CD_ON_PB_BIT == -1
-# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED
-# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1
-# endif
-# endif
-#endif
-
-#endif /* PORT3 */
-
-
-#if defined(CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED) || \
- defined(CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED) || \
- defined(CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED) || \
- defined(CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED)
-#define CONFIG_ETRAX_SERX_DTR_RI_DSR_CD_MIXED
-#endif
-
-#ifdef CONFIG_ETRAX_SERX_DTR_RI_DSR_CD_MIXED
-/* The pins can be mixed on PA and PB */
-#define CONTROL_PINS_PORT_NOT_USED(line) \
- &dummy_ser[line], &dummy_ser[line], \
- &dummy_ser[line], &dummy_ser[line], \
- &dummy_ser[line], &dummy_ser[line], \
- &dummy_ser[line], &dummy_ser[line], \
- DUMMY_DTR_MASK, DUMMY_RI_MASK, DUMMY_DSR_MASK, DUMMY_CD_MASK
-
-
-struct control_pins
-{
- volatile unsigned char *dtr_port;
- unsigned char *dtr_shadow;
- volatile unsigned char *ri_port;
- unsigned char *ri_shadow;
- volatile unsigned char *dsr_port;
- unsigned char *dsr_shadow;
- volatile unsigned char *cd_port;
- unsigned char *cd_shadow;
-
- unsigned char dtr_mask;
- unsigned char ri_mask;
- unsigned char dsr_mask;
- unsigned char cd_mask;
-};
-
-static const struct control_pins e100_modem_pins[NR_PORTS] =
-{
- /* Ser 0 */
- {
-#ifdef CONFIG_ETRAX_SERIAL_PORT0
- E100_STRUCT_PORT(0,DTR), E100_STRUCT_SHADOW(0,DTR),
- E100_STRUCT_PORT(0,RI), E100_STRUCT_SHADOW(0,RI),
- E100_STRUCT_PORT(0,DSR), E100_STRUCT_SHADOW(0,DSR),
- E100_STRUCT_PORT(0,CD), E100_STRUCT_SHADOW(0,CD),
- E100_STRUCT_MASK(0,DTR),
- E100_STRUCT_MASK(0,RI),
- E100_STRUCT_MASK(0,DSR),
- E100_STRUCT_MASK(0,CD)
-#else
- CONTROL_PINS_PORT_NOT_USED(0)
-#endif
- },
-
- /* Ser 1 */
- {
-#ifdef CONFIG_ETRAX_SERIAL_PORT1
- E100_STRUCT_PORT(1,DTR), E100_STRUCT_SHADOW(1,DTR),
- E100_STRUCT_PORT(1,RI), E100_STRUCT_SHADOW(1,RI),
- E100_STRUCT_PORT(1,DSR), E100_STRUCT_SHADOW(1,DSR),
- E100_STRUCT_PORT(1,CD), E100_STRUCT_SHADOW(1,CD),
- E100_STRUCT_MASK(1,DTR),
- E100_STRUCT_MASK(1,RI),
- E100_STRUCT_MASK(1,DSR),
- E100_STRUCT_MASK(1,CD)
-#else
- CONTROL_PINS_PORT_NOT_USED(1)
-#endif
- },
-
- /* Ser 2 */
- {
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
- E100_STRUCT_PORT(2,DTR), E100_STRUCT_SHADOW(2,DTR),
- E100_STRUCT_PORT(2,RI), E100_STRUCT_SHADOW(2,RI),
- E100_STRUCT_PORT(2,DSR), E100_STRUCT_SHADOW(2,DSR),
- E100_STRUCT_PORT(2,CD), E100_STRUCT_SHADOW(2,CD),
- E100_STRUCT_MASK(2,DTR),
- E100_STRUCT_MASK(2,RI),
- E100_STRUCT_MASK(2,DSR),
- E100_STRUCT_MASK(2,CD)
-#else
- CONTROL_PINS_PORT_NOT_USED(2)
-#endif
- },
-
- /* Ser 3 */
- {
-#ifdef CONFIG_ETRAX_SERIAL_PORT3
- E100_STRUCT_PORT(3,DTR), E100_STRUCT_SHADOW(3,DTR),
- E100_STRUCT_PORT(3,RI), E100_STRUCT_SHADOW(3,RI),
- E100_STRUCT_PORT(3,DSR), E100_STRUCT_SHADOW(3,DSR),
- E100_STRUCT_PORT(3,CD), E100_STRUCT_SHADOW(3,CD),
- E100_STRUCT_MASK(3,DTR),
- E100_STRUCT_MASK(3,RI),
- E100_STRUCT_MASK(3,DSR),
- E100_STRUCT_MASK(3,CD)
-#else
- CONTROL_PINS_PORT_NOT_USED(3)
-#endif
- }
-};
-#else /* CONFIG_ETRAX_SERX_DTR_RI_DSR_CD_MIXED */
-
-/* All pins are on either PA or PB for each serial port */
-#define CONTROL_PINS_PORT_NOT_USED(line) \
- &dummy_ser[line], &dummy_ser[line], \
- DUMMY_DTR_MASK, DUMMY_RI_MASK, DUMMY_DSR_MASK, DUMMY_CD_MASK
-
-
-struct control_pins
-{
- volatile unsigned char *port;
- unsigned char *shadow;
-
- unsigned char dtr_mask;
- unsigned char ri_mask;
- unsigned char dsr_mask;
- unsigned char cd_mask;
-};
-
-#define dtr_port port
-#define dtr_shadow shadow
-#define ri_port port
-#define ri_shadow shadow
-#define dsr_port port
-#define dsr_shadow shadow
-#define cd_port port
-#define cd_shadow shadow
-
-static const struct control_pins e100_modem_pins[NR_PORTS] =
-{
- /* Ser 0 */
- {
-#ifdef CONFIG_ETRAX_SERIAL_PORT0
- E100_STRUCT_PORT(0,DTR), E100_STRUCT_SHADOW(0,DTR),
- E100_STRUCT_MASK(0,DTR),
- E100_STRUCT_MASK(0,RI),
- E100_STRUCT_MASK(0,DSR),
- E100_STRUCT_MASK(0,CD)
-#else
- CONTROL_PINS_PORT_NOT_USED(0)
-#endif
- },
-
- /* Ser 1 */
- {
-#ifdef CONFIG_ETRAX_SERIAL_PORT1
- E100_STRUCT_PORT(1,DTR), E100_STRUCT_SHADOW(1,DTR),
- E100_STRUCT_MASK(1,DTR),
- E100_STRUCT_MASK(1,RI),
- E100_STRUCT_MASK(1,DSR),
- E100_STRUCT_MASK(1,CD)
-#else
- CONTROL_PINS_PORT_NOT_USED(1)
-#endif
- },
-
- /* Ser 2 */
- {
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
- E100_STRUCT_PORT(2,DTR), E100_STRUCT_SHADOW(2,DTR),
- E100_STRUCT_MASK(2,DTR),
- E100_STRUCT_MASK(2,RI),
- E100_STRUCT_MASK(2,DSR),
- E100_STRUCT_MASK(2,CD)
-#else
- CONTROL_PINS_PORT_NOT_USED(2)
-#endif
- },
-
- /* Ser 3 */
- {
-#ifdef CONFIG_ETRAX_SERIAL_PORT3
- E100_STRUCT_PORT(3,DTR), E100_STRUCT_SHADOW(3,DTR),
- E100_STRUCT_MASK(3,DTR),
- E100_STRUCT_MASK(3,RI),
- E100_STRUCT_MASK(3,DSR),
- E100_STRUCT_MASK(3,CD)
-#else
- CONTROL_PINS_PORT_NOT_USED(3)
-#endif
- }
-};
-#endif /* !CONFIG_ETRAX_SERX_DTR_RI_DSR_CD_MIXED */
-
-#define E100_RTS_MASK 0x20
-#define E100_CTS_MASK 0x40
-
-/* All serial port signals are active low:
- * active = 0 -> 3.3V to RS-232 driver -> -12V on RS-232 level
- * inactive = 1 -> 0V to RS-232 driver -> +12V on RS-232 level
- *
- * These macros returns the pin value: 0=0V, >=1 = 3.3V on ETRAX chip
- */
-
-/* Output */
-#define E100_RTS_GET(info) ((info)->rx_ctrl & E100_RTS_MASK)
-/* Input */
-#define E100_CTS_GET(info) ((info)->ioport[REG_STATUS] & E100_CTS_MASK)
-
-/* These are typically PA or PB and 0 means 0V, 1 means 3.3V */
-/* Is an output */
-#define E100_DTR_GET(info) ((*e100_modem_pins[(info)->line].dtr_shadow) & e100_modem_pins[(info)->line].dtr_mask)
-
-/* Normally inputs */
-#define E100_RI_GET(info) ((*e100_modem_pins[(info)->line].ri_port) & e100_modem_pins[(info)->line].ri_mask)
-#define E100_CD_GET(info) ((*e100_modem_pins[(info)->line].cd_port) & e100_modem_pins[(info)->line].cd_mask)
-
-/* Input */
-#define E100_DSR_GET(info) ((*e100_modem_pins[(info)->line].dsr_port) & e100_modem_pins[(info)->line].dsr_mask)
-
-
-/*
- * tmp_buf is used as a temporary buffer by serial_write. We need to
- * lock it in case the memcpy_fromfs blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-static DEFINE_MUTEX(tmp_buf_mutex);
-
-/* Calculate the chartime depending on baudrate, numbor of bits etc. */
-static void update_char_time(struct e100_serial * info)
-{
- tcflag_t cflags = info->port.tty->termios->c_cflag;
- int bits;
-
- /* calc. number of bits / data byte */
- /* databits + startbit and 1 stopbit */
- if ((cflags & CSIZE) == CS7)
- bits = 9;
- else
- bits = 10;
-
- if (cflags & CSTOPB) /* 2 stopbits ? */
- bits++;
-
- if (cflags & PARENB) /* parity bit ? */
- bits++;
-
- /* calc timeout */
- info->char_time_usec = ((bits * 1000000) / info->baud) + 1;
- info->flush_time_usec = 4*info->char_time_usec;
- if (info->flush_time_usec < MIN_FLUSH_TIME_USEC)
- info->flush_time_usec = MIN_FLUSH_TIME_USEC;
-
-}
-
-/*
- * This function maps from the Bxxxx defines in asm/termbits.h into real
- * baud rates.
- */
-
-static int
-cflag_to_baud(unsigned int cflag)
-{
- static int baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400,
- 4800, 9600, 19200, 38400 };
-
- static int ext_baud_table[] = {
- 0, 57600, 115200, 230400, 460800, 921600, 1843200, 6250000,
- 0, 0, 0, 0, 0, 0, 0, 0 };
-
- if (cflag & CBAUDEX)
- return ext_baud_table[(cflag & CBAUD) & ~CBAUDEX];
- else
- return baud_table[cflag & CBAUD];
-}
-
-/* and this maps to an etrax100 hardware baud constant */
-
-static unsigned char
-cflag_to_etrax_baud(unsigned int cflag)
-{
- char retval;
-
- static char baud_table[] = {
- -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, -1, 3, 4, 5, 6, 7 };
-
- static char ext_baud_table[] = {
- -1, 8, 9, 10, 11, 12, 13, 14, -1, -1, -1, -1, -1, -1, -1, -1 };
-
- if (cflag & CBAUDEX)
- retval = ext_baud_table[(cflag & CBAUD) & ~CBAUDEX];
- else
- retval = baud_table[cflag & CBAUD];
-
- if (retval < 0) {
- printk(KERN_WARNING "serdriver tried setting invalid baud rate, flags %x.\n", cflag);
- retval = 5; /* choose default 9600 instead */
- }
-
- return retval | (retval << 4); /* choose same for both TX and RX */
-}
-
-
-/* Various static support functions */
-
-/* Functions to set or clear DTR/RTS on the requested line */
-/* It is complicated by the fact that RTS is a serial port register, while
- * DTR might not be implemented in the HW at all, and if it is, it can be on
- * any general port.
- */
-
-
-static inline void
-e100_dtr(struct e100_serial *info, int set)
-{
-#ifndef CONFIG_SVINTO_SIM
- unsigned char mask = e100_modem_pins[info->line].dtr_mask;
-
-#ifdef SERIAL_DEBUG_IO
- printk("ser%i dtr %i mask: 0x%02X\n", info->line, set, mask);
- printk("ser%i shadow before 0x%02X get: %i\n",
- info->line, *e100_modem_pins[info->line].dtr_shadow,
- E100_DTR_GET(info));
-#endif
- /* DTR is active low */
- {
- unsigned long flags;
-
- local_irq_save(flags);
- *e100_modem_pins[info->line].dtr_shadow &= ~mask;
- *e100_modem_pins[info->line].dtr_shadow |= (set ? 0 : mask);
- *e100_modem_pins[info->line].dtr_port = *e100_modem_pins[info->line].dtr_shadow;
- local_irq_restore(flags);
- }
-
-#ifdef SERIAL_DEBUG_IO
- printk("ser%i shadow after 0x%02X get: %i\n",
- info->line, *e100_modem_pins[info->line].dtr_shadow,
- E100_DTR_GET(info));
-#endif
-#endif
-}
-
-/* set = 0 means 3.3V on the pin, bitvalue: 0=active, 1=inactive
- * 0=0V , 1=3.3V
- */
-static inline void
-e100_rts(struct e100_serial *info, int set)
-{
-#ifndef CONFIG_SVINTO_SIM
- unsigned long flags;
- local_irq_save(flags);
- info->rx_ctrl &= ~E100_RTS_MASK;
- info->rx_ctrl |= (set ? 0 : E100_RTS_MASK); /* RTS is active low */
- info->ioport[REG_REC_CTRL] = info->rx_ctrl;
- local_irq_restore(flags);
-#ifdef SERIAL_DEBUG_IO
- printk("ser%i rts %i\n", info->line, set);
-#endif
-#endif
-}
-
-
-/* If this behaves as a modem, RI and CD is an output */
-static inline void
-e100_ri_out(struct e100_serial *info, int set)
-{
-#ifndef CONFIG_SVINTO_SIM
- /* RI is active low */
- {
- unsigned char mask = e100_modem_pins[info->line].ri_mask;
- unsigned long flags;
-
- local_irq_save(flags);
- *e100_modem_pins[info->line].ri_shadow &= ~mask;
- *e100_modem_pins[info->line].ri_shadow |= (set ? 0 : mask);
- *e100_modem_pins[info->line].ri_port = *e100_modem_pins[info->line].ri_shadow;
- local_irq_restore(flags);
- }
-#endif
-}
-static inline void
-e100_cd_out(struct e100_serial *info, int set)
-{
-#ifndef CONFIG_SVINTO_SIM
- /* CD is active low */
- {
- unsigned char mask = e100_modem_pins[info->line].cd_mask;
- unsigned long flags;
-
- local_irq_save(flags);
- *e100_modem_pins[info->line].cd_shadow &= ~mask;
- *e100_modem_pins[info->line].cd_shadow |= (set ? 0 : mask);
- *e100_modem_pins[info->line].cd_port = *e100_modem_pins[info->line].cd_shadow;
- local_irq_restore(flags);
- }
-#endif
-}
-
-static inline void
-e100_disable_rx(struct e100_serial *info)
-{
-#ifndef CONFIG_SVINTO_SIM
- /* disable the receiver */
- info->ioport[REG_REC_CTRL] =
- (info->rx_ctrl &= ~IO_MASK(R_SERIAL0_REC_CTRL, rec_enable));
-#endif
-}
-
-static inline void
-e100_enable_rx(struct e100_serial *info)
-{
-#ifndef CONFIG_SVINTO_SIM
- /* enable the receiver */
- info->ioport[REG_REC_CTRL] =
- (info->rx_ctrl |= IO_MASK(R_SERIAL0_REC_CTRL, rec_enable));
-#endif
-}
-
-/* the rx DMA uses both the dma_descr and the dma_eop interrupts */
-
-static inline void
-e100_disable_rxdma_irq(struct e100_serial *info)
-{
-#ifdef SERIAL_DEBUG_INTR
- printk("rxdma_irq(%d): 0\n",info->line);
-#endif
- DINTR1(DEBUG_LOG(info->line,"IRQ disable_rxdma_irq %i\n", info->line));
- *R_IRQ_MASK2_CLR = (info->irq << 2) | (info->irq << 3);
-}
-
-static inline void
-e100_enable_rxdma_irq(struct e100_serial *info)
-{
-#ifdef SERIAL_DEBUG_INTR
- printk("rxdma_irq(%d): 1\n",info->line);
-#endif
- DINTR1(DEBUG_LOG(info->line,"IRQ enable_rxdma_irq %i\n", info->line));
- *R_IRQ_MASK2_SET = (info->irq << 2) | (info->irq << 3);
-}
-
-/* the tx DMA uses only dma_descr interrupt */
-
-static void e100_disable_txdma_irq(struct e100_serial *info)
-{
-#ifdef SERIAL_DEBUG_INTR
- printk("txdma_irq(%d): 0\n",info->line);
-#endif
- DINTR1(DEBUG_LOG(info->line,"IRQ disable_txdma_irq %i\n", info->line));
- *R_IRQ_MASK2_CLR = info->irq;
-}
-
-static void e100_enable_txdma_irq(struct e100_serial *info)
-{
-#ifdef SERIAL_DEBUG_INTR
- printk("txdma_irq(%d): 1\n",info->line);
-#endif
- DINTR1(DEBUG_LOG(info->line,"IRQ enable_txdma_irq %i\n", info->line));
- *R_IRQ_MASK2_SET = info->irq;
-}
-
-static void e100_disable_txdma_channel(struct e100_serial *info)
-{
- unsigned long flags;
-
- /* Disable output DMA channel for the serial port in question
- * ( set to something other than serialX)
- */
- local_irq_save(flags);
- DFLOW(DEBUG_LOG(info->line, "disable_txdma_channel %i\n", info->line));
- if (info->line == 0) {
- if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma6)) ==
- IO_STATE(R_GEN_CONFIG, dma6, serial0)) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma6);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma6, unused);
- }
- } else if (info->line == 1) {
- if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma8)) ==
- IO_STATE(R_GEN_CONFIG, dma8, serial1)) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma8);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma8, usb);
- }
- } else if (info->line == 2) {
- if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma2)) ==
- IO_STATE(R_GEN_CONFIG, dma2, serial2)) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma2);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma2, par0);
- }
- } else if (info->line == 3) {
- if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma4)) ==
- IO_STATE(R_GEN_CONFIG, dma4, serial3)) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma4);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, par1);
- }
- }
- *R_GEN_CONFIG = genconfig_shadow;
- local_irq_restore(flags);
-}
-
-
-static void e100_enable_txdma_channel(struct e100_serial *info)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- DFLOW(DEBUG_LOG(info->line, "enable_txdma_channel %i\n", info->line));
- /* Enable output DMA channel for the serial port in question */
- if (info->line == 0) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma6);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma6, serial0);
- } else if (info->line == 1) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma8);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma8, serial1);
- } else if (info->line == 2) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma2);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma2, serial2);
- } else if (info->line == 3) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma4);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, serial3);
- }
- *R_GEN_CONFIG = genconfig_shadow;
- local_irq_restore(flags);
-}
-
-static void e100_disable_rxdma_channel(struct e100_serial *info)
-{
- unsigned long flags;
-
- /* Disable input DMA channel for the serial port in question
- * ( set to something other than serialX)
- */
- local_irq_save(flags);
- if (info->line == 0) {
- if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma7)) ==
- IO_STATE(R_GEN_CONFIG, dma7, serial0)) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma7);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma7, unused);
- }
- } else if (info->line == 1) {
- if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma9)) ==
- IO_STATE(R_GEN_CONFIG, dma9, serial1)) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma9);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma9, usb);
- }
- } else if (info->line == 2) {
- if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma3)) ==
- IO_STATE(R_GEN_CONFIG, dma3, serial2)) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma3);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma3, par0);
- }
- } else if (info->line == 3) {
- if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma5)) ==
- IO_STATE(R_GEN_CONFIG, dma5, serial3)) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma5);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, par1);
- }
- }
- *R_GEN_CONFIG = genconfig_shadow;
- local_irq_restore(flags);
-}
-
-
-static void e100_enable_rxdma_channel(struct e100_serial *info)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- /* Enable input DMA channel for the serial port in question */
- if (info->line == 0) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma7);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma7, serial0);
- } else if (info->line == 1) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma9);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma9, serial1);
- } else if (info->line == 2) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma3);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma3, serial2);
- } else if (info->line == 3) {
- genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma5);
- genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, serial3);
- }
- *R_GEN_CONFIG = genconfig_shadow;
- local_irq_restore(flags);
-}
-
-#ifdef SERIAL_HANDLE_EARLY_ERRORS
-/* in order to detect and fix errors on the first byte
- we have to use the serial interrupts as well. */
-
-static inline void
-e100_disable_serial_data_irq(struct e100_serial *info)
-{
-#ifdef SERIAL_DEBUG_INTR
- printk("ser_irq(%d): 0\n",info->line);
-#endif
- DINTR1(DEBUG_LOG(info->line,"IRQ disable data_irq %i\n", info->line));
- *R_IRQ_MASK1_CLR = (1U << (8+2*info->line));
-}
-
-static inline void
-e100_enable_serial_data_irq(struct e100_serial *info)
-{
-#ifdef SERIAL_DEBUG_INTR
- printk("ser_irq(%d): 1\n",info->line);
- printk("**** %d = %d\n",
- (8+2*info->line),
- (1U << (8+2*info->line)));
-#endif
- DINTR1(DEBUG_LOG(info->line,"IRQ enable data_irq %i\n", info->line));
- *R_IRQ_MASK1_SET = (1U << (8+2*info->line));
-}
-#endif
-
-static inline void
-e100_disable_serial_tx_ready_irq(struct e100_serial *info)
-{
-#ifdef SERIAL_DEBUG_INTR
- printk("ser_tx_irq(%d): 0\n",info->line);
-#endif
- DINTR1(DEBUG_LOG(info->line,"IRQ disable ready_irq %i\n", info->line));
- *R_IRQ_MASK1_CLR = (1U << (8+1+2*info->line));
-}
-
-static inline void
-e100_enable_serial_tx_ready_irq(struct e100_serial *info)
-{
-#ifdef SERIAL_DEBUG_INTR
- printk("ser_tx_irq(%d): 1\n",info->line);
- printk("**** %d = %d\n",
- (8+1+2*info->line),
- (1U << (8+1+2*info->line)));
-#endif
- DINTR2(DEBUG_LOG(info->line,"IRQ enable ready_irq %i\n", info->line));
- *R_IRQ_MASK1_SET = (1U << (8+1+2*info->line));
-}
-
-static inline void e100_enable_rx_irq(struct e100_serial *info)
-{
- if (info->uses_dma_in)
- e100_enable_rxdma_irq(info);
- else
- e100_enable_serial_data_irq(info);
-}
-static inline void e100_disable_rx_irq(struct e100_serial *info)
-{
- if (info->uses_dma_in)
- e100_disable_rxdma_irq(info);
- else
- e100_disable_serial_data_irq(info);
-}
-
-#if defined(CONFIG_ETRAX_RS485)
-/* Enable RS-485 mode on selected port. This is UGLY. */
-static int
-e100_enable_rs485(struct tty_struct *tty, struct serial_rs485 *r)
-{
- struct e100_serial * info = (struct e100_serial *)tty->driver_data;
-
-#if defined(CONFIG_ETRAX_RS485_ON_PA)
- *R_PORT_PA_DATA = port_pa_data_shadow |= (1 << rs485_pa_bit);
-#endif
-#if defined(CONFIG_ETRAX_RS485_ON_PORT_G)
- REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow,
- rs485_port_g_bit, 1);
-#endif
-#if defined(CONFIG_ETRAX_RS485_LTC1387)
- REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow,
- CONFIG_ETRAX_RS485_LTC1387_DXEN_PORT_G_BIT, 1);
- REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow,
- CONFIG_ETRAX_RS485_LTC1387_RXEN_PORT_G_BIT, 1);
-#endif
-
- info->rs485 = *r;
-
- /* Maximum delay before RTS equal to 1000 */
- if (info->rs485.delay_rts_before_send >= 1000)
- info->rs485.delay_rts_before_send = 1000;
-
-/* printk("rts: on send = %i, after = %i, enabled = %i",
- info->rs485.rts_on_send,
- info->rs485.rts_after_sent,
- info->rs485.enabled
- );
-*/
- return 0;
-}
-
-static int
-e100_write_rs485(struct tty_struct *tty,
- const unsigned char *buf, int count)
-{
- struct e100_serial * info = (struct e100_serial *)tty->driver_data;
- int old_value = (info->rs485.flags) & SER_RS485_ENABLED;
-
- /* rs485 is always implicitly enabled if we're using the ioctl()
- * but it doesn't have to be set in the serial_rs485
- * (to be backward compatible with old apps)
- * So we store, set and restore it.
- */
- info->rs485.flags |= SER_RS485_ENABLED;
- /* rs_write now deals with RS485 if enabled */
- count = rs_write(tty, buf, count);
- if (!old_value)
- info->rs485.flags &= ~(SER_RS485_ENABLED);
- return count;
-}
-
-#ifdef CONFIG_ETRAX_FAST_TIMER
-/* Timer function to toggle RTS when using FAST_TIMER */
-static void rs485_toggle_rts_timer_function(unsigned long data)
-{
- struct e100_serial *info = (struct e100_serial *)data;
-
- fast_timers_rs485[info->line].function = NULL;
- e100_rts(info, (info->rs485.flags & SER_RS485_RTS_AFTER_SEND));
-#if defined(CONFIG_ETRAX_RS485_DISABLE_RECEIVER)
- e100_enable_rx(info);
- e100_enable_rx_irq(info);
-#endif
-}
-#endif
-#endif /* CONFIG_ETRAX_RS485 */
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter using the XOFF registers, as necessary.
- * ------------------------------------------------------------
- */
-
-static void
-rs_stop(struct tty_struct *tty)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- if (info) {
- unsigned long flags;
- unsigned long xoff;
-
- local_irq_save(flags);
- DFLOW(DEBUG_LOG(info->line, "XOFF rs_stop xmit %i\n",
- CIRC_CNT(info->xmit.head,
- info->xmit.tail,SERIAL_XMIT_SIZE)));
-
- xoff = IO_FIELD(R_SERIAL0_XOFF, xoff_char,
- STOP_CHAR(info->port.tty));
- xoff |= IO_STATE(R_SERIAL0_XOFF, tx_stop, stop);
- if (tty->termios->c_iflag & IXON ) {
- xoff |= IO_STATE(R_SERIAL0_XOFF, auto_xoff, enable);
- }
-
- *((unsigned long *)&info->ioport[REG_XOFF]) = xoff;
- local_irq_restore(flags);
- }
-}
-
-static void
-rs_start(struct tty_struct *tty)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- if (info) {
- unsigned long flags;
- unsigned long xoff;
-
- local_irq_save(flags);
- DFLOW(DEBUG_LOG(info->line, "XOFF rs_start xmit %i\n",
- CIRC_CNT(info->xmit.head,
- info->xmit.tail,SERIAL_XMIT_SIZE)));
- xoff = IO_FIELD(R_SERIAL0_XOFF, xoff_char, STOP_CHAR(tty));
- xoff |= IO_STATE(R_SERIAL0_XOFF, tx_stop, enable);
- if (tty->termios->c_iflag & IXON ) {
- xoff |= IO_STATE(R_SERIAL0_XOFF, auto_xoff, enable);
- }
-
- *((unsigned long *)&info->ioport[REG_XOFF]) = xoff;
- if (!info->uses_dma_out &&
- info->xmit.head != info->xmit.tail && info->xmit.buf)
- e100_enable_serial_tx_ready_irq(info);
-
- local_irq_restore(flags);
- }
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines. All of the following
- * subroutines are declared as inline and are folded into
- * rs_interrupt(). They were separated out for readability's sake.
- *
- * Note: rs_interrupt() is a "fast" interrupt, which means that it
- * runs with interrupts turned off. People who may want to modify
- * rs_interrupt() should try to keep the interrupt handler as fast as
- * possible. After you are done making modifications, it is not a bad
- * idea to do:
- *
- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
- *
- * and look at the resulting assemble code in serial.s.
- *
- * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-/*
- * This routine is used by the interrupt handler to schedule
- * processing in the software interrupt portion of the driver.
- */
-static void rs_sched_event(struct e100_serial *info, int event)
-{
- if (info->event & (1 << event))
- return;
- info->event |= 1 << event;
- schedule_work(&info->work);
-}
-
-/* The output DMA channel is free - use it to send as many chars as possible
- * NOTES:
- * We don't pay attention to info->x_char, which means if the TTY wants to
- * use XON/XOFF it will set info->x_char but we won't send any X char!
- *
- * To implement this, we'd just start a DMA send of 1 byte pointing at a
- * buffer containing the X char, and skip updating xmit. We'd also have to
- * check if the last sent char was the X char when we enter this function
- * the next time, to avoid updating xmit with the sent X value.
- */
-
-static void
-transmit_chars_dma(struct e100_serial *info)
-{
- unsigned int c, sentl;
- struct etrax_dma_descr *descr;
-
-#ifdef CONFIG_SVINTO_SIM
- /* This will output too little if tail is not 0 always since
- * we don't reloop to send the other part. Anyway this SHOULD be a
- * no-op - transmit_chars_dma would never really be called during sim
- * since rs_write does not write into the xmit buffer then.
- */
- if (info->xmit.tail)
- printk("Error in serial.c:transmit_chars-dma(), tail!=0\n");
- if (info->xmit.head != info->xmit.tail) {
- SIMCOUT(info->xmit.buf + info->xmit.tail,
- CIRC_CNT(info->xmit.head,
- info->xmit.tail,
- SERIAL_XMIT_SIZE));
- info->xmit.head = info->xmit.tail; /* move back head */
- info->tr_running = 0;
- }
- return;
-#endif
- /* acknowledge both dma_descr and dma_eop irq in R_DMA_CHx_CLR_INTR */
- *info->oclrintradr =
- IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) |
- IO_STATE(R_DMA_CH6_CLR_INTR, clr_eop, do);
-
-#ifdef SERIAL_DEBUG_INTR
- if (info->line == SERIAL_DEBUG_LINE)
- printk("tc\n");
-#endif
- if (!info->tr_running) {
- /* weirdo... we shouldn't get here! */
- printk(KERN_WARNING "Achtung: transmit_chars_dma with !tr_running\n");
- return;
- }
-
- descr = &info->tr_descr;
-
- /* first get the amount of bytes sent during the last DMA transfer,
- and update xmit accordingly */
-
- /* if the stop bit was not set, all data has been sent */
- if (!(descr->status & d_stop)) {
- sentl = descr->sw_len;
- } else
- /* otherwise we find the amount of data sent here */
- sentl = descr->hw_len;
-
- DFLOW(DEBUG_LOG(info->line, "TX %i done\n", sentl));
-
- /* update stats */
- info->icount.tx += sentl;
-
- /* update xmit buffer */
- info->xmit.tail = (info->xmit.tail + sentl) & (SERIAL_XMIT_SIZE - 1);
-
- /* if there is only a few chars left in the buf, wake up the blocked
- write if any */
- if (CIRC_CNT(info->xmit.head,
- info->xmit.tail,
- SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
- rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-
- /* find out the largest amount of consecutive bytes we want to send now */
-
- c = CIRC_CNT_TO_END(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
-
- /* Don't send all in one DMA transfer - divide it so we wake up
- * application before all is sent
- */
-
- if (c >= 4*WAKEUP_CHARS)
- c = c/2;
-
- if (c <= 0) {
- /* our job here is done, don't schedule any new DMA transfer */
- info->tr_running = 0;
-
-#if defined(CONFIG_ETRAX_RS485) && defined(CONFIG_ETRAX_FAST_TIMER)
- if (info->rs485.flags & SER_RS485_ENABLED) {
- /* Set a short timer to toggle RTS */
- start_one_shot_timer(&fast_timers_rs485[info->line],
- rs485_toggle_rts_timer_function,
- (unsigned long)info,
- info->char_time_usec*2,
- "RS-485");
- }
-#endif /* RS485 */
- return;
- }
-
- /* ok we can schedule a dma send of c chars starting at info->xmit.tail */
- /* set up the descriptor correctly for output */
- DFLOW(DEBUG_LOG(info->line, "TX %i\n", c));
- descr->ctrl = d_int | d_eol | d_wait; /* Wait needed for tty_wait_until_sent() */
- descr->sw_len = c;
- descr->buf = virt_to_phys(info->xmit.buf + info->xmit.tail);
- descr->status = 0;
-
- *info->ofirstadr = virt_to_phys(descr); /* write to R_DMAx_FIRST */
- *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, start);
-
- /* DMA is now running (hopefully) */
-} /* transmit_chars_dma */
-
-static void
-start_transmit(struct e100_serial *info)
-{
-#if 0
- if (info->line == SERIAL_DEBUG_LINE)
- printk("x\n");
-#endif
-
- info->tr_descr.sw_len = 0;
- info->tr_descr.hw_len = 0;
- info->tr_descr.status = 0;
- info->tr_running = 1;
- if (info->uses_dma_out)
- transmit_chars_dma(info);
- else
- e100_enable_serial_tx_ready_irq(info);
-} /* start_transmit */
-
-#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
-static int serial_fast_timer_started = 0;
-static int serial_fast_timer_expired = 0;
-static void flush_timeout_function(unsigned long data);
-#define START_FLUSH_FAST_TIMER_TIME(info, string, usec) {\
- unsigned long timer_flags; \
- local_irq_save(timer_flags); \
- if (fast_timers[info->line].function == NULL) { \
- serial_fast_timer_started++; \
- TIMERD(DEBUG_LOG(info->line, "start_timer %i ", info->line)); \
- TIMERD(DEBUG_LOG(info->line, "num started: %i\n", serial_fast_timer_started)); \
- start_one_shot_timer(&fast_timers[info->line], \
- flush_timeout_function, \
- (unsigned long)info, \
- (usec), \
- string); \
- } \
- else { \
- TIMERD(DEBUG_LOG(info->line, "timer %i already running\n", info->line)); \
- } \
- local_irq_restore(timer_flags); \
-}
-#define START_FLUSH_FAST_TIMER(info, string) START_FLUSH_FAST_TIMER_TIME(info, string, info->flush_time_usec)
-
-#else
-#define START_FLUSH_FAST_TIMER_TIME(info, string, usec)
-#define START_FLUSH_FAST_TIMER(info, string)
-#endif
-
-static struct etrax_recv_buffer *
-alloc_recv_buffer(unsigned int size)
-{
- struct etrax_recv_buffer *buffer;
-
- if (!(buffer = kmalloc(sizeof *buffer + size, GFP_ATOMIC)))
- return NULL;
-
- buffer->next = NULL;
- buffer->length = 0;
- buffer->error = TTY_NORMAL;
-
- return buffer;
-}
-
-static void
-append_recv_buffer(struct e100_serial *info, struct etrax_recv_buffer *buffer)
-{
- unsigned long flags;
-
- local_irq_save(flags);
-
- if (!info->first_recv_buffer)
- info->first_recv_buffer = buffer;
- else
- info->last_recv_buffer->next = buffer;
-
- info->last_recv_buffer = buffer;
-
- info->recv_cnt += buffer->length;
- if (info->recv_cnt > info->max_recv_cnt)
- info->max_recv_cnt = info->recv_cnt;
-
- local_irq_restore(flags);
-}
-
-static int
-add_char_and_flag(struct e100_serial *info, unsigned char data, unsigned char flag)
-{
- struct etrax_recv_buffer *buffer;
- if (info->uses_dma_in) {
- if (!(buffer = alloc_recv_buffer(4)))
- return 0;
-
- buffer->length = 1;
- buffer->error = flag;
- buffer->buffer[0] = data;
-
- append_recv_buffer(info, buffer);
-
- info->icount.rx++;
- } else {
- struct tty_struct *tty = info->port.tty;
- tty_insert_flip_char(tty, data, flag);
- info->icount.rx++;
- }
-
- return 1;
-}
-
-static unsigned int handle_descr_data(struct e100_serial *info,
- struct etrax_dma_descr *descr,
- unsigned int recvl)
-{
- struct etrax_recv_buffer *buffer = phys_to_virt(descr->buf) - sizeof *buffer;
-
- if (info->recv_cnt + recvl > 65536) {
- printk(KERN_CRIT
- "%s: Too much pending incoming serial data! Dropping %u bytes.\n", __func__, recvl);
- return 0;
- }
-
- buffer->length = recvl;
-
- if (info->errorcode == ERRCODE_SET_BREAK)
- buffer->error = TTY_BREAK;
- info->errorcode = 0;
-
- append_recv_buffer(info, buffer);
-
- if (!(buffer = alloc_recv_buffer(SERIAL_DESCR_BUF_SIZE)))
- panic("%s: Failed to allocate memory for receive buffer!\n", __func__);
-
- descr->buf = virt_to_phys(buffer->buffer);
-
- return recvl;
-}
-
-static unsigned int handle_all_descr_data(struct e100_serial *info)
-{
- struct etrax_dma_descr *descr;
- unsigned int recvl;
- unsigned int ret = 0;
-
- while (1)
- {
- descr = &info->rec_descr[info->cur_rec_descr];
-
- if (descr == phys_to_virt(*info->idescradr))
- break;
-
- if (++info->cur_rec_descr == SERIAL_RECV_DESCRIPTORS)
- info->cur_rec_descr = 0;
-
- /* find out how many bytes were read */
-
- /* if the eop bit was not set, all data has been received */
- if (!(descr->status & d_eop)) {
- recvl = descr->sw_len;
- } else {
- /* otherwise we find the amount of data received here */
- recvl = descr->hw_len;
- }
-
- /* Reset the status information */
- descr->status = 0;
-
- DFLOW( DEBUG_LOG(info->line, "RX %lu\n", recvl);
- if (info->port.tty->stopped) {
- unsigned char *buf = phys_to_virt(descr->buf);
- DEBUG_LOG(info->line, "rx 0x%02X\n", buf[0]);
- DEBUG_LOG(info->line, "rx 0x%02X\n", buf[1]);
- DEBUG_LOG(info->line, "rx 0x%02X\n", buf[2]);
- }
- );
-
- /* update stats */
- info->icount.rx += recvl;
-
- ret += handle_descr_data(info, descr, recvl);
- }
-
- return ret;
-}
-
-static void receive_chars_dma(struct e100_serial *info)
-{
- struct tty_struct *tty;
- unsigned char rstat;
-
-#ifdef CONFIG_SVINTO_SIM
- /* No receive in the simulator. Will probably be when the rest of
- * the serial interface works, and this piece will just be removed.
- */
- return;
-#endif
-
- /* Acknowledge both dma_descr and dma_eop irq in R_DMA_CHx_CLR_INTR */
- *info->iclrintradr =
- IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) |
- IO_STATE(R_DMA_CH6_CLR_INTR, clr_eop, do);
-
- tty = info->port.tty;
- if (!tty) /* Something wrong... */
- return;
-
-#ifdef SERIAL_HANDLE_EARLY_ERRORS
- if (info->uses_dma_in)
- e100_enable_serial_data_irq(info);
-#endif
-
- if (info->errorcode == ERRCODE_INSERT_BREAK)
- add_char_and_flag(info, '\0', TTY_BREAK);
-
- handle_all_descr_data(info);
-
- /* Read the status register to detect errors */
- rstat = info->ioport[REG_STATUS];
- if (rstat & IO_MASK(R_SERIAL0_STATUS, xoff_detect) ) {
- DFLOW(DEBUG_LOG(info->line, "XOFF detect stat %x\n", rstat));
- }
-
- if (rstat & SER_ERROR_MASK) {
- /* If we got an error, we must reset it by reading the
- * data_in field
- */
- unsigned char data = info->ioport[REG_DATA];
-
- PROCSTAT(ser_stat[info->line].errors_cnt++);
- DEBUG_LOG(info->line, "#dERR: s d 0x%04X\n",
- ((rstat & SER_ERROR_MASK) << 8) | data);
-
- if (rstat & SER_PAR_ERR_MASK)
- add_char_and_flag(info, data, TTY_PARITY);
- else if (rstat & SER_OVERRUN_MASK)
- add_char_and_flag(info, data, TTY_OVERRUN);
- else if (rstat & SER_FRAMING_ERR_MASK)
- add_char_and_flag(info, data, TTY_FRAME);
- }
-
- START_FLUSH_FAST_TIMER(info, "receive_chars");
-
- /* Restart the receiving DMA */
- *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, restart);
-}
-
-static int start_recv_dma(struct e100_serial *info)
-{
- struct etrax_dma_descr *descr = info->rec_descr;
- struct etrax_recv_buffer *buffer;
- int i;
-
- /* Set up the receiving descriptors */
- for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++) {
- if (!(buffer = alloc_recv_buffer(SERIAL_DESCR_BUF_SIZE)))
- panic("%s: Failed to allocate memory for receive buffer!\n", __func__);
-
- descr[i].ctrl = d_int;
- descr[i].buf = virt_to_phys(buffer->buffer);
- descr[i].sw_len = SERIAL_DESCR_BUF_SIZE;
- descr[i].hw_len = 0;
- descr[i].status = 0;
- descr[i].next = virt_to_phys(&descr[i+1]);
- }
-
- /* Link the last descriptor to the first */
- descr[i-1].next = virt_to_phys(&descr[0]);
-
- /* Start with the first descriptor in the list */
- info->cur_rec_descr = 0;
-
- /* Start the DMA */
- *info->ifirstadr = virt_to_phys(&descr[info->cur_rec_descr]);
- *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, start);
-
- /* Input DMA should be running now */
- return 1;
-}
-
-static void
-start_receive(struct e100_serial *info)
-{
-#ifdef CONFIG_SVINTO_SIM
- /* No receive in the simulator. Will probably be when the rest of
- * the serial interface works, and this piece will just be removed.
- */
- return;
-#endif
- if (info->uses_dma_in) {
- /* reset the input dma channel to be sure it works */
-
- *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset);
- while (IO_EXTRACT(R_DMA_CH6_CMD, cmd, *info->icmdadr) ==
- IO_STATE_VALUE(R_DMA_CH6_CMD, cmd, reset));
-
- start_recv_dma(info);
- }
-}
-
-
-/* the bits in the MASK2 register are laid out like this:
- DMAI_EOP DMAI_DESCR DMAO_EOP DMAO_DESCR
- where I is the input channel and O is the output channel for the port.
- info->irq is the bit number for the DMAO_DESCR so to check the others we
- shift info->irq to the left.
-*/
-
-/* dma output channel interrupt handler
- this interrupt is called from DMA2(ser2), DMA4(ser3), DMA6(ser0) or
- DMA8(ser1) when they have finished a descriptor with the intr flag set.
-*/
-
-static irqreturn_t
-tr_interrupt(int irq, void *dev_id)
-{
- struct e100_serial *info;
- unsigned long ireg;
- int i;
- int handled = 0;
-
-#ifdef CONFIG_SVINTO_SIM
- /* No receive in the simulator. Will probably be when the rest of
- * the serial interface works, and this piece will just be removed.
- */
- {
- const char *s = "What? tr_interrupt in simulator??\n";
- SIMCOUT(s,strlen(s));
- }
- return IRQ_HANDLED;
-#endif
-
- /* find out the line that caused this irq and get it from rs_table */
-
- ireg = *R_IRQ_MASK2_RD; /* get the active irq bits for the dma channels */
-
- for (i = 0; i < NR_PORTS; i++) {
- info = rs_table + i;
- if (!info->enabled || !info->uses_dma_out)
- continue;
- /* check for dma_descr (don't need to check for dma_eop in output dma for serial */
- if (ireg & info->irq) {
- handled = 1;
- /* we can send a new dma bunch. make it so. */
- DINTR2(DEBUG_LOG(info->line, "tr_interrupt %i\n", i));
- /* Read jiffies_usec first,
- * we want this time to be as late as possible
- */
- PROCSTAT(ser_stat[info->line].tx_dma_ints++);
- info->last_tx_active_usec = GET_JIFFIES_USEC();
- info->last_tx_active = jiffies;
- transmit_chars_dma(info);
- }
-
- /* FIXME: here we should really check for a change in the
- status lines and if so call status_handle(info) */
- }
- return IRQ_RETVAL(handled);
-} /* tr_interrupt */
-
-/* dma input channel interrupt handler */
-
-static irqreturn_t
-rec_interrupt(int irq, void *dev_id)
-{
- struct e100_serial *info;
- unsigned long ireg;
- int i;
- int handled = 0;
-
-#ifdef CONFIG_SVINTO_SIM
- /* No receive in the simulator. Will probably be when the rest of
- * the serial interface works, and this piece will just be removed.
- */
- {
- const char *s = "What? rec_interrupt in simulator??\n";
- SIMCOUT(s,strlen(s));
- }
- return IRQ_HANDLED;
-#endif
-
- /* find out the line that caused this irq and get it from rs_table */
-
- ireg = *R_IRQ_MASK2_RD; /* get the active irq bits for the dma channels */
-
- for (i = 0; i < NR_PORTS; i++) {
- info = rs_table + i;
- if (!info->enabled || !info->uses_dma_in)
- continue;
- /* check for both dma_eop and dma_descr for the input dma channel */
- if (ireg & ((info->irq << 2) | (info->irq << 3))) {
- handled = 1;
- /* we have received something */
- receive_chars_dma(info);
- }
-
- /* FIXME: here we should really check for a change in the
- status lines and if so call status_handle(info) */
- }
- return IRQ_RETVAL(handled);
-} /* rec_interrupt */
-
-static int force_eop_if_needed(struct e100_serial *info)
-{
- /* We check data_avail bit to determine if data has
- * arrived since last time
- */
- unsigned char rstat = info->ioport[REG_STATUS];
-
- /* error or datavail? */
- if (rstat & SER_ERROR_MASK) {
- /* Some error has occurred. If there has been valid data, an
- * EOP interrupt will be made automatically. If no data, the
- * normal ser_interrupt should be enabled and handle it.
- * So do nothing!
- */
- DEBUG_LOG(info->line, "timeout err: rstat 0x%03X\n",
- rstat | (info->line << 8));
- return 0;
- }
-
- if (rstat & SER_DATA_AVAIL_MASK) {
- /* Ok data, no error, count it */
- TIMERD(DEBUG_LOG(info->line, "timeout: rstat 0x%03X\n",
- rstat | (info->line << 8)));
- /* Read data to clear status flags */
- (void)info->ioport[REG_DATA];
-
- info->forced_eop = 0;
- START_FLUSH_FAST_TIMER(info, "magic");
- return 0;
- }
-
- /* hit the timeout, force an EOP for the input
- * dma channel if we haven't already
- */
- if (!info->forced_eop) {
- info->forced_eop = 1;
- PROCSTAT(ser_stat[info->line].timeout_flush_cnt++);
- TIMERD(DEBUG_LOG(info->line, "timeout EOP %i\n", info->line));
- FORCE_EOP(info);
- }
-
- return 1;
-}
-
-static void flush_to_flip_buffer(struct e100_serial *info)
-{
- struct tty_struct *tty;
- struct etrax_recv_buffer *buffer;
- unsigned long flags;
-
- local_irq_save(flags);
- tty = info->port.tty;
-
- if (!tty) {
- local_irq_restore(flags);
- return;
- }
-
- while ((buffer = info->first_recv_buffer) != NULL) {
- unsigned int count = buffer->length;
-
- tty_insert_flip_string(tty, buffer->buffer, count);
- info->recv_cnt -= count;
-
- if (count == buffer->length) {
- info->first_recv_buffer = buffer->next;
- kfree(buffer);
- } else {
- buffer->length -= count;
- memmove(buffer->buffer, buffer->buffer + count, buffer->length);
- buffer->error = TTY_NORMAL;
- }
- }
-
- if (!info->first_recv_buffer)
- info->last_recv_buffer = NULL;
-
- local_irq_restore(flags);
-
- /* This includes a check for low-latency */
- tty_flip_buffer_push(tty);
-}
-
-static void check_flush_timeout(struct e100_serial *info)
-{
- /* Flip what we've got (if we can) */
- flush_to_flip_buffer(info);
-
- /* We might need to flip later, but not to fast
- * since the system is busy processing input... */
- if (info->first_recv_buffer)
- START_FLUSH_FAST_TIMER_TIME(info, "flip", 2000);
-
- /* Force eop last, since data might have come while we're processing
- * and if we started the slow timer above, we won't start a fast
- * below.
- */
- force_eop_if_needed(info);
-}
-
-#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
-static void flush_timeout_function(unsigned long data)
-{
- struct e100_serial *info = (struct e100_serial *)data;
-
- fast_timers[info->line].function = NULL;
- serial_fast_timer_expired++;
- TIMERD(DEBUG_LOG(info->line, "flush_timout %i ", info->line));
- TIMERD(DEBUG_LOG(info->line, "num expired: %i\n", serial_fast_timer_expired));
- check_flush_timeout(info);
-}
-
-#else
-
-/* dma fifo/buffer timeout handler
- forces an end-of-packet for the dma input channel if no chars
- have been received for CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS/100 s.
-*/
-
-static struct timer_list flush_timer;
-
-static void
-timed_flush_handler(unsigned long ptr)
-{
- struct e100_serial *info;
- int i;
-
-#ifdef CONFIG_SVINTO_SIM
- return;
-#endif
-
- for (i = 0; i < NR_PORTS; i++) {
- info = rs_table + i;
- if (info->uses_dma_in)
- check_flush_timeout(info);
- }
-
- /* restart flush timer */
- mod_timer(&flush_timer, jiffies + CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS);
-}
-#endif
-
-#ifdef SERIAL_HANDLE_EARLY_ERRORS
-
-/* If there is an error (ie break) when the DMA is running and
- * there are no bytes in the fifo the DMA is stopped and we get no
- * eop interrupt. Thus we have to monitor the first bytes on a DMA
- * transfer, and if it is without error we can turn the serial
- * interrupts off.
- */
-
-/*
-BREAK handling on ETRAX 100:
-ETRAX will generate interrupt although there is no stop bit between the
-characters.
-
-Depending on how long the break sequence is, the end of the breaksequence
-will look differently:
-| indicates start/end of a character.
-
-B= Break character (0x00) with framing error.
-E= Error byte with parity error received after B characters.
-F= "Faked" valid byte received immediately after B characters.
-V= Valid byte
-
-1.
- B BL ___________________________ V
-.._|__________|__________| |valid data |
-
-Multiple frame errors with data == 0x00 (B),
-the timing matches up "perfectly" so no extra ending char is detected.
-The RXD pin is 1 in the last interrupt, in that case
-we set info->errorcode = ERRCODE_INSERT_BREAK, but we can't really
-know if another byte will come and this really is case 2. below
-(e.g F=0xFF or 0xFE)
-If RXD pin is 0 we can expect another character (see 2. below).
-
-
-2.
-
- B B E or F__________________..__ V
-.._|__________|__________|______ | |valid data
- "valid" or
- parity error
-
-Multiple frame errors with data == 0x00 (B),
-but the part of the break trigs is interpreted as a start bit (and possibly
-some 0 bits followed by a number of 1 bits and a stop bit).
-Depending on parity settings etc. this last character can be either
-a fake "valid" char (F) or have a parity error (E).
-
-If the character is valid it will be put in the buffer,
-we set info->errorcode = ERRCODE_SET_BREAK so the receive interrupt
-will set the flags so the tty will handle it,
-if it's an error byte it will not be put in the buffer
-and we set info->errorcode = ERRCODE_INSERT_BREAK.
-
-To distinguish a V byte in 1. from an F byte in 2. we keep a timestamp
-of the last faulty char (B) and compares it with the current time:
-If the time elapsed time is less then 2*char_time_usec we will assume
-it's a faked F char and not a Valid char and set
-info->errorcode = ERRCODE_SET_BREAK.
-
-Flaws in the above solution:
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-We use the timer to distinguish a F character from a V character,
-if a V character is to close after the break we might make the wrong decision.
-
-TODO: The break will be delayed until an F or V character is received.
-
-*/
-
-static
-struct e100_serial * handle_ser_rx_interrupt_no_dma(struct e100_serial *info)
-{
- unsigned long data_read;
- struct tty_struct *tty = info->port.tty;
-
- if (!tty) {
- printk("!NO TTY!\n");
- return info;
- }
-
- /* Read data and status at the same time */
- data_read = *((unsigned long *)&info->ioport[REG_DATA_STATUS32]);
-more_data:
- if (data_read & IO_MASK(R_SERIAL0_READ, xoff_detect) ) {
- DFLOW(DEBUG_LOG(info->line, "XOFF detect\n", 0));
- }
- DINTR2(DEBUG_LOG(info->line, "ser_rx %c\n", IO_EXTRACT(R_SERIAL0_READ, data_in, data_read)));
-
- if (data_read & ( IO_MASK(R_SERIAL0_READ, framing_err) |
- IO_MASK(R_SERIAL0_READ, par_err) |
- IO_MASK(R_SERIAL0_READ, overrun) )) {
- /* An error */
- info->last_rx_active_usec = GET_JIFFIES_USEC();
- info->last_rx_active = jiffies;
- DINTR1(DEBUG_LOG(info->line, "ser_rx err stat_data %04X\n", data_read));
- DLOG_INT_TRIG(
- if (!log_int_trig1_pos) {
- log_int_trig1_pos = log_int_pos;
- log_int(rdpc(), 0, 0);
- }
- );
-
-
- if ( ((data_read & IO_MASK(R_SERIAL0_READ, data_in)) == 0) &&
- (data_read & IO_MASK(R_SERIAL0_READ, framing_err)) ) {
- /* Most likely a break, but we get interrupts over and
- * over again.
- */
-
- if (!info->break_detected_cnt) {
- DEBUG_LOG(info->line, "#BRK start\n", 0);
- }
- if (data_read & IO_MASK(R_SERIAL0_READ, rxd)) {
- /* The RX pin is high now, so the break
- * must be over, but....
- * we can't really know if we will get another
- * last byte ending the break or not.
- * And we don't know if the byte (if any) will
- * have an error or look valid.
- */
- DEBUG_LOG(info->line, "# BL BRK\n", 0);
- info->errorcode = ERRCODE_INSERT_BREAK;
- }
- info->break_detected_cnt++;
- } else {
- /* The error does not look like a break, but could be
- * the end of one
- */
- if (info->break_detected_cnt) {
- DEBUG_LOG(info->line, "EBRK %i\n", info->break_detected_cnt);
- info->errorcode = ERRCODE_INSERT_BREAK;
- } else {
- unsigned char data = IO_EXTRACT(R_SERIAL0_READ,
- data_in, data_read);
- char flag = TTY_NORMAL;
- if (info->errorcode == ERRCODE_INSERT_BREAK) {
- struct tty_struct *tty = info->port.tty;
- tty_insert_flip_char(tty, 0, flag);
- info->icount.rx++;
- }
-
- if (data_read & IO_MASK(R_SERIAL0_READ, par_err)) {
- info->icount.parity++;
- flag = TTY_PARITY;
- } else if (data_read & IO_MASK(R_SERIAL0_READ, overrun)) {
- info->icount.overrun++;
- flag = TTY_OVERRUN;
- } else if (data_read & IO_MASK(R_SERIAL0_READ, framing_err)) {
- info->icount.frame++;
- flag = TTY_FRAME;
- }
- tty_insert_flip_char(tty, data, flag);
- info->errorcode = 0;
- }
- info->break_detected_cnt = 0;
- }
- } else if (data_read & IO_MASK(R_SERIAL0_READ, data_avail)) {
- /* No error */
- DLOG_INT_TRIG(
- if (!log_int_trig1_pos) {
- if (log_int_pos >= log_int_size) {
- log_int_pos = 0;
- }
- log_int_trig0_pos = log_int_pos;
- log_int(rdpc(), 0, 0);
- }
- );
- tty_insert_flip_char(tty,
- IO_EXTRACT(R_SERIAL0_READ, data_in, data_read),
- TTY_NORMAL);
- } else {
- DEBUG_LOG(info->line, "ser_rx int but no data_avail %08lX\n", data_read);
- }
-
-
- info->icount.rx++;
- data_read = *((unsigned long *)&info->ioport[REG_DATA_STATUS32]);
- if (data_read & IO_MASK(R_SERIAL0_READ, data_avail)) {
- DEBUG_LOG(info->line, "ser_rx %c in loop\n", IO_EXTRACT(R_SERIAL0_READ, data_in, data_read));
- goto more_data;
- }
-
- tty_flip_buffer_push(info->port.tty);
- return info;
-}
-
-static struct e100_serial* handle_ser_rx_interrupt(struct e100_serial *info)
-{
- unsigned char rstat;
-
-#ifdef SERIAL_DEBUG_INTR
- printk("Interrupt from serport %d\n", i);
-#endif
-/* DEBUG_LOG(info->line, "ser_interrupt stat %03X\n", rstat | (i << 8)); */
- if (!info->uses_dma_in) {
- return handle_ser_rx_interrupt_no_dma(info);
- }
- /* DMA is used */
- rstat = info->ioport[REG_STATUS];
- if (rstat & IO_MASK(R_SERIAL0_STATUS, xoff_detect) ) {
- DFLOW(DEBUG_LOG(info->line, "XOFF detect\n", 0));
- }
-
- if (rstat & SER_ERROR_MASK) {
- unsigned char data;
-
- info->last_rx_active_usec = GET_JIFFIES_USEC();
- info->last_rx_active = jiffies;
- /* If we got an error, we must reset it by reading the
- * data_in field
- */
- data = info->ioport[REG_DATA];
- DINTR1(DEBUG_LOG(info->line, "ser_rx! %c\n", data));
- DINTR1(DEBUG_LOG(info->line, "ser_rx err stat %02X\n", rstat));
- if (!data && (rstat & SER_FRAMING_ERR_MASK)) {
- /* Most likely a break, but we get interrupts over and
- * over again.
- */
-
- if (!info->break_detected_cnt) {
- DEBUG_LOG(info->line, "#BRK start\n", 0);
- }
- if (rstat & SER_RXD_MASK) {
- /* The RX pin is high now, so the break
- * must be over, but....
- * we can't really know if we will get another
- * last byte ending the break or not.
- * And we don't know if the byte (if any) will
- * have an error or look valid.
- */
- DEBUG_LOG(info->line, "# BL BRK\n", 0);
- info->errorcode = ERRCODE_INSERT_BREAK;
- }
- info->break_detected_cnt++;
- } else {
- /* The error does not look like a break, but could be
- * the end of one
- */
- if (info->break_detected_cnt) {
- DEBUG_LOG(info->line, "EBRK %i\n", info->break_detected_cnt);
- info->errorcode = ERRCODE_INSERT_BREAK;
- } else {
- if (info->errorcode == ERRCODE_INSERT_BREAK) {
- info->icount.brk++;
- add_char_and_flag(info, '\0', TTY_BREAK);
- }
-
- if (rstat & SER_PAR_ERR_MASK) {
- info->icount.parity++;
- add_char_and_flag(info, data, TTY_PARITY);
- } else if (rstat & SER_OVERRUN_MASK) {
- info->icount.overrun++;
- add_char_and_flag(info, data, TTY_OVERRUN);
- } else if (rstat & SER_FRAMING_ERR_MASK) {
- info->icount.frame++;
- add_char_and_flag(info, data, TTY_FRAME);
- }
-
- info->errorcode = 0;
- }
- info->break_detected_cnt = 0;
- DEBUG_LOG(info->line, "#iERR s d %04X\n",
- ((rstat & SER_ERROR_MASK) << 8) | data);
- }
- PROCSTAT(ser_stat[info->line].early_errors_cnt++);
- } else { /* It was a valid byte, now let the DMA do the rest */
- unsigned long curr_time_u = GET_JIFFIES_USEC();
- unsigned long curr_time = jiffies;
-
- if (info->break_detected_cnt) {
- /* Detect if this character is a new valid char or the
- * last char in a break sequence: If LSBits are 0 and
- * MSBits are high AND the time is close to the
- * previous interrupt we should discard it.
- */
- long elapsed_usec =
- (curr_time - info->last_rx_active) * (1000000/HZ) +
- curr_time_u - info->last_rx_active_usec;
- if (elapsed_usec < 2*info->char_time_usec) {
- DEBUG_LOG(info->line, "FBRK %i\n", info->line);
- /* Report as BREAK (error) and let
- * receive_chars_dma() handle it
- */
- info->errorcode = ERRCODE_SET_BREAK;
- } else {
- DEBUG_LOG(info->line, "Not end of BRK (V)%i\n", info->line);
- }
- DEBUG_LOG(info->line, "num brk %i\n", info->break_detected_cnt);
- }
-
-#ifdef SERIAL_DEBUG_INTR
- printk("** OK, disabling ser_interrupts\n");
-#endif
- e100_disable_serial_data_irq(info);
- DINTR2(DEBUG_LOG(info->line, "ser_rx OK %d\n", info->line));
- info->break_detected_cnt = 0;
-
- PROCSTAT(ser_stat[info->line].ser_ints_ok_cnt++);
- }
- /* Restarting the DMA never hurts */
- *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, restart);
- START_FLUSH_FAST_TIMER(info, "ser_int");
- return info;
-} /* handle_ser_rx_interrupt */
-
-static void handle_ser_tx_interrupt(struct e100_serial *info)
-{
- unsigned long flags;
-
- if (info->x_char) {
- unsigned char rstat;
- DFLOW(DEBUG_LOG(info->line, "tx_int: xchar 0x%02X\n", info->x_char));
- local_irq_save(flags);
- rstat = info->ioport[REG_STATUS];
- DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat));
-
- info->ioport[REG_TR_DATA] = info->x_char;
- info->icount.tx++;
- info->x_char = 0;
- /* We must enable since it is disabled in ser_interrupt */
- e100_enable_serial_tx_ready_irq(info);
- local_irq_restore(flags);
- return;
- }
- if (info->uses_dma_out) {
- unsigned char rstat;
- int i;
- /* We only use normal tx interrupt when sending x_char */
- DFLOW(DEBUG_LOG(info->line, "tx_int: xchar sent\n", 0));
- local_irq_save(flags);
- rstat = info->ioport[REG_STATUS];
- DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat));
- e100_disable_serial_tx_ready_irq(info);
- if (info->port.tty->stopped)
- rs_stop(info->port.tty);
- /* Enable the DMA channel and tell it to continue */
- e100_enable_txdma_channel(info);
- /* Wait 12 cycles before doing the DMA command */
- for(i = 6; i > 0; i--)
- nop();
-
- *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, continue);
- local_irq_restore(flags);
- return;
- }
- /* Normal char-by-char interrupt */
- if (info->xmit.head == info->xmit.tail
- || info->port.tty->stopped
- || info->port.tty->hw_stopped) {
- DFLOW(DEBUG_LOG(info->line, "tx_int: stopped %i\n",
- info->port.tty->stopped));
- e100_disable_serial_tx_ready_irq(info);
- info->tr_running = 0;
- return;
- }
- DINTR2(DEBUG_LOG(info->line, "tx_int %c\n", info->xmit.buf[info->xmit.tail]));
- /* Send a byte, rs485 timing is critical so turn of ints */
- local_irq_save(flags);
- info->ioport[REG_TR_DATA] = info->xmit.buf[info->xmit.tail];
- info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1);
- info->icount.tx++;
- if (info->xmit.head == info->xmit.tail) {
-#if defined(CONFIG_ETRAX_RS485) && defined(CONFIG_ETRAX_FAST_TIMER)
- if (info->rs485.flags & SER_RS485_ENABLED) {
- /* Set a short timer to toggle RTS */
- start_one_shot_timer(&fast_timers_rs485[info->line],
- rs485_toggle_rts_timer_function,
- (unsigned long)info,
- info->char_time_usec*2,
- "RS-485");
- }
-#endif /* RS485 */
- info->last_tx_active_usec = GET_JIFFIES_USEC();
- info->last_tx_active = jiffies;
- e100_disable_serial_tx_ready_irq(info);
- info->tr_running = 0;
- DFLOW(DEBUG_LOG(info->line, "tx_int: stop2\n", 0));
- } else {
- /* We must enable since it is disabled in ser_interrupt */
- e100_enable_serial_tx_ready_irq(info);
- }
- local_irq_restore(flags);
-
- if (CIRC_CNT(info->xmit.head,
- info->xmit.tail,
- SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
- rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-
-} /* handle_ser_tx_interrupt */
-
-/* result of time measurements:
- * RX duration 54-60 us when doing something, otherwise 6-9 us
- * ser_int duration: just sending: 8-15 us normally, up to 73 us
- */
-static irqreturn_t
-ser_interrupt(int irq, void *dev_id)
-{
- static volatile int tx_started = 0;
- struct e100_serial *info;
- int i;
- unsigned long flags;
- unsigned long irq_mask1_rd;
- unsigned long data_mask = (1 << (8+2*0)); /* ser0 data_avail */
- int handled = 0;
- static volatile unsigned long reentered_ready_mask = 0;
-
- local_irq_save(flags);
- irq_mask1_rd = *R_IRQ_MASK1_RD;
- /* First handle all rx interrupts with ints disabled */
- info = rs_table;
- irq_mask1_rd &= e100_ser_int_mask;
- for (i = 0; i < NR_PORTS; i++) {
- /* Which line caused the data irq? */
- if (irq_mask1_rd & data_mask) {
- handled = 1;
- handle_ser_rx_interrupt(info);
- }
- info += 1;
- data_mask <<= 2;
- }
- /* Handle tx interrupts with interrupts enabled so we
- * can take care of new data interrupts while transmitting
- * We protect the tx part with the tx_started flag.
- * We disable the tr_ready interrupts we are about to handle and
- * unblock the serial interrupt so new serial interrupts may come.
- *
- * If we get a new interrupt:
- * - it migth be due to synchronous serial ports.
- * - serial irq will be blocked by general irq handler.
- * - async data will be handled above (sync will be ignored).
- * - tx_started flag will prevent us from trying to send again and
- * we will exit fast - no need to unblock serial irq.
- * - Next (sync) serial interrupt handler will be runned with
- * disabled interrupt due to restore_flags() at end of function,
- * so sync handler will not be preempted or reentered.
- */
- if (!tx_started) {
- unsigned long ready_mask;
- unsigned long
- tx_started = 1;
- /* Only the tr_ready interrupts left */
- irq_mask1_rd &= (IO_MASK(R_IRQ_MASK1_RD, ser0_ready) |
- IO_MASK(R_IRQ_MASK1_RD, ser1_ready) |
- IO_MASK(R_IRQ_MASK1_RD, ser2_ready) |
- IO_MASK(R_IRQ_MASK1_RD, ser3_ready));
- while (irq_mask1_rd) {
- /* Disable those we are about to handle */
- *R_IRQ_MASK1_CLR = irq_mask1_rd;
- /* Unblock the serial interrupt */
- *R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set);
-
- local_irq_enable();
- ready_mask = (1 << (8+1+2*0)); /* ser0 tr_ready */
- info = rs_table;
- for (i = 0; i < NR_PORTS; i++) {
- /* Which line caused the ready irq? */
- if (irq_mask1_rd & ready_mask) {
- handled = 1;
- handle_ser_tx_interrupt(info);
- }
- info += 1;
- ready_mask <<= 2;
- }
- /* handle_ser_tx_interrupt enables tr_ready interrupts */
- local_irq_disable();
- /* Handle reentered TX interrupt */
- irq_mask1_rd = reentered_ready_mask;
- }
- local_irq_disable();
- tx_started = 0;
- } else {
- unsigned long ready_mask;
- ready_mask = irq_mask1_rd & (IO_MASK(R_IRQ_MASK1_RD, ser0_ready) |
- IO_MASK(R_IRQ_MASK1_RD, ser1_ready) |
- IO_MASK(R_IRQ_MASK1_RD, ser2_ready) |
- IO_MASK(R_IRQ_MASK1_RD, ser3_ready));
- if (ready_mask) {
- reentered_ready_mask |= ready_mask;
- /* Disable those we are about to handle */
- *R_IRQ_MASK1_CLR = ready_mask;
- DFLOW(DEBUG_LOG(SERIAL_DEBUG_LINE, "ser_int reentered with TX %X\n", ready_mask));
- }
- }
-
- local_irq_restore(flags);
- return IRQ_RETVAL(handled);
-} /* ser_interrupt */
-#endif
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-/*
- * This routine is used to handle the "bottom half" processing for the
- * serial driver, known also the "software interrupt" processing.
- * This processing is done at the kernel interrupt level, after the
- * rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
- * is where time-consuming activities which can not be done in the
- * interrupt driver proper are done; the interrupt driver schedules
- * them using rs_sched_event(), and they get done here.
- */
-static void
-do_softint(struct work_struct *work)
-{
- struct e100_serial *info;
- struct tty_struct *tty;
-
- info = container_of(work, struct e100_serial, work);
-
- tty = info->port.tty;
- if (!tty)
- return;
-
- if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
- tty_wakeup(tty);
-}
-
-static int
-startup(struct e100_serial * info)
-{
- unsigned long flags;
- unsigned long xmit_page;
- int i;
-
- xmit_page = get_zeroed_page(GFP_KERNEL);
- if (!xmit_page)
- return -ENOMEM;
-
- local_irq_save(flags);
-
- /* if it was already initialized, skip this */
-
- if (info->flags & ASYNC_INITIALIZED) {
- local_irq_restore(flags);
- free_page(xmit_page);
- return 0;
- }
-
- if (info->xmit.buf)
- free_page(xmit_page);
- else
- info->xmit.buf = (unsigned char *) xmit_page;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("starting up ttyS%d (xmit_buf 0x%p)...\n", info->line, info->xmit.buf);
-#endif
-
-#ifdef CONFIG_SVINTO_SIM
- /* Bits and pieces collected from below. Better to have them
- in one ifdef:ed clause than to mix in a lot of ifdefs,
- right? */
- if (info->port.tty)
- clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->xmit.head = info->xmit.tail = 0;
- info->first_recv_buffer = info->last_recv_buffer = NULL;
- info->recv_cnt = info->max_recv_cnt = 0;
-
- for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++)
- info->rec_descr[i].buf = NULL;
-
- /* No real action in the simulator, but may set info important
- to ioctl. */
- change_speed(info);
-#else
-
- /*
- * Clear the FIFO buffers and disable them
- * (they will be reenabled in change_speed())
- */
-
- /*
- * Reset the DMA channels and make sure their interrupts are cleared
- */
-
- if (info->dma_in_enabled) {
- info->uses_dma_in = 1;
- e100_enable_rxdma_channel(info);
-
- *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset);
-
- /* Wait until reset cycle is complete */
- while (IO_EXTRACT(R_DMA_CH6_CMD, cmd, *info->icmdadr) ==
- IO_STATE_VALUE(R_DMA_CH6_CMD, cmd, reset));
-
- /* Make sure the irqs are cleared */
- *info->iclrintradr =
- IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) |
- IO_STATE(R_DMA_CH6_CLR_INTR, clr_eop, do);
- } else {
- e100_disable_rxdma_channel(info);
- }
-
- if (info->dma_out_enabled) {
- info->uses_dma_out = 1;
- e100_enable_txdma_channel(info);
- *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset);
-
- while (IO_EXTRACT(R_DMA_CH6_CMD, cmd, *info->ocmdadr) ==
- IO_STATE_VALUE(R_DMA_CH6_CMD, cmd, reset));
-
- /* Make sure the irqs are cleared */
- *info->oclrintradr =
- IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) |
- IO_STATE(R_DMA_CH6_CLR_INTR, clr_eop, do);
- } else {
- e100_disable_txdma_channel(info);
- }
-
- if (info->port.tty)
- clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->xmit.head = info->xmit.tail = 0;
- info->first_recv_buffer = info->last_recv_buffer = NULL;
- info->recv_cnt = info->max_recv_cnt = 0;
-
- for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++)
- info->rec_descr[i].buf = 0;
-
- /*
- * and set the speed and other flags of the serial port
- * this will start the rx/tx as well
- */
-#ifdef SERIAL_HANDLE_EARLY_ERRORS
- e100_enable_serial_data_irq(info);
-#endif
- change_speed(info);
-
- /* dummy read to reset any serial errors */
-
- (void)info->ioport[REG_DATA];
-
- /* enable the interrupts */
- if (info->uses_dma_out)
- e100_enable_txdma_irq(info);
-
- e100_enable_rx_irq(info);
-
- info->tr_running = 0; /* to be sure we don't lock up the transmitter */
-
- /* setup the dma input descriptor and start dma */
-
- start_receive(info);
-
- /* for safety, make sure the descriptors last result is 0 bytes written */
-
- info->tr_descr.sw_len = 0;
- info->tr_descr.hw_len = 0;
- info->tr_descr.status = 0;
-
- /* enable RTS/DTR last */
-
- e100_rts(info, 1);
- e100_dtr(info, 1);
-
-#endif /* CONFIG_SVINTO_SIM */
-
- info->flags |= ASYNC_INITIALIZED;
-
- local_irq_restore(flags);
- return 0;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void
-shutdown(struct e100_serial * info)
-{
- unsigned long flags;
- struct etrax_dma_descr *descr = info->rec_descr;
- struct etrax_recv_buffer *buffer;
- int i;
-
-#ifndef CONFIG_SVINTO_SIM
- /* shut down the transmitter and receiver */
- DFLOW(DEBUG_LOG(info->line, "shutdown %i\n", info->line));
- e100_disable_rx(info);
- info->ioport[REG_TR_CTRL] = (info->tx_ctrl &= ~0x40);
-
- /* disable interrupts, reset dma channels */
- if (info->uses_dma_in) {
- e100_disable_rxdma_irq(info);
- *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset);
- info->uses_dma_in = 0;
- } else {
- e100_disable_serial_data_irq(info);
- }
-
- if (info->uses_dma_out) {
- e100_disable_txdma_irq(info);
- info->tr_running = 0;
- *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset);
- info->uses_dma_out = 0;
- } else {
- e100_disable_serial_tx_ready_irq(info);
- info->tr_running = 0;
- }
-
-#endif /* CONFIG_SVINTO_SIM */
-
- if (!(info->flags & ASYNC_INITIALIZED))
- return;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("Shutting down serial port %d (irq %d)....\n", info->line,
- info->irq);
-#endif
-
- local_irq_save(flags);
-
- if (info->xmit.buf) {
- free_page((unsigned long)info->xmit.buf);
- info->xmit.buf = NULL;
- }
-
- for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++)
- if (descr[i].buf) {
- buffer = phys_to_virt(descr[i].buf) - sizeof *buffer;
- kfree(buffer);
- descr[i].buf = 0;
- }
-
- if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
- /* hang up DTR and RTS if HUPCL is enabled */
- e100_dtr(info, 0);
- e100_rts(info, 0); /* could check CRTSCTS before doing this */
- }
-
- if (info->port.tty)
- set_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->flags &= ~ASYNC_INITIALIZED;
- local_irq_restore(flags);
-}
-
-
-/* change baud rate and other assorted parameters */
-
-static void
-change_speed(struct e100_serial *info)
-{
- unsigned int cflag;
- unsigned long xoff;
- unsigned long flags;
- /* first some safety checks */
-
- if (!info->port.tty || !info->port.tty->termios)
- return;
- if (!info->ioport)
- return;
-
- cflag = info->port.tty->termios->c_cflag;
-
- /* possibly, the tx/rx should be disabled first to do this safely */
-
- /* change baud-rate and write it to the hardware */
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) {
- /* Special baudrate */
- u32 mask = 0xFF << (info->line*8); /* Each port has 8 bits */
- unsigned long alt_source =
- IO_STATE(R_ALT_SER_BAUDRATE, ser0_rec, normal) |
- IO_STATE(R_ALT_SER_BAUDRATE, ser0_tr, normal);
- /* R_ALT_SER_BAUDRATE selects the source */
- DBAUD(printk("Custom baudrate: baud_base/divisor %lu/%i\n",
- (unsigned long)info->baud_base, info->custom_divisor));
- if (info->baud_base == SERIAL_PRESCALE_BASE) {
- /* 0, 2-65535 (0=65536) */
- u16 divisor = info->custom_divisor;
- /* R_SERIAL_PRESCALE (upper 16 bits of R_CLOCK_PRESCALE) */
- /* baudrate is 3.125MHz/custom_divisor */
- alt_source =
- IO_STATE(R_ALT_SER_BAUDRATE, ser0_rec, prescale) |
- IO_STATE(R_ALT_SER_BAUDRATE, ser0_tr, prescale);
- alt_source = 0x11;
- DBAUD(printk("Writing SERIAL_PRESCALE: divisor %i\n", divisor));
- *R_SERIAL_PRESCALE = divisor;
- info->baud = SERIAL_PRESCALE_BASE/divisor;
- }
-#ifdef CONFIG_ETRAX_EXTERN_PB6CLK_ENABLED
- else if ((info->baud_base==CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8 &&
- info->custom_divisor == 1) ||
- (info->baud_base==CONFIG_ETRAX_EXTERN_PB6CLK_FREQ &&
- info->custom_divisor == 8)) {
- /* ext_clk selected */
- alt_source =
- IO_STATE(R_ALT_SER_BAUDRATE, ser0_rec, extern) |
- IO_STATE(R_ALT_SER_BAUDRATE, ser0_tr, extern);
- DBAUD(printk("using external baudrate: %lu\n", CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8));
- info->baud = CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8;
- }
-#endif
- else
- {
- /* Bad baudbase, we don't support using timer0
- * for baudrate.
- */
- printk(KERN_WARNING "Bad baud_base/custom_divisor: %lu/%i\n",
- (unsigned long)info->baud_base, info->custom_divisor);
- }
- r_alt_ser_baudrate_shadow &= ~mask;
- r_alt_ser_baudrate_shadow |= (alt_source << (info->line*8));
- *R_ALT_SER_BAUDRATE = r_alt_ser_baudrate_shadow;
- } else {
- /* Normal baudrate */
- /* Make sure we use normal baudrate */
- u32 mask = 0xFF << (info->line*8); /* Each port has 8 bits */
- unsigned long alt_source =
- IO_STATE(R_ALT_SER_BAUDRATE, ser0_rec, normal) |
- IO_STATE(R_ALT_SER_BAUDRATE, ser0_tr, normal);
- r_alt_ser_baudrate_shadow &= ~mask;
- r_alt_ser_baudrate_shadow |= (alt_source << (info->line*8));
-#ifndef CONFIG_SVINTO_SIM
- *R_ALT_SER_BAUDRATE = r_alt_ser_baudrate_shadow;
-#endif /* CONFIG_SVINTO_SIM */
-
- info->baud = cflag_to_baud(cflag);
-#ifndef CONFIG_SVINTO_SIM
- info->ioport[REG_BAUD] = cflag_to_etrax_baud(cflag);
-#endif /* CONFIG_SVINTO_SIM */
- }
-
-#ifndef CONFIG_SVINTO_SIM
- /* start with default settings and then fill in changes */
- local_irq_save(flags);
- /* 8 bit, no/even parity */
- info->rx_ctrl &= ~(IO_MASK(R_SERIAL0_REC_CTRL, rec_bitnr) |
- IO_MASK(R_SERIAL0_REC_CTRL, rec_par_en) |
- IO_MASK(R_SERIAL0_REC_CTRL, rec_par));
-
- /* 8 bit, no/even parity, 1 stop bit, no cts */
- info->tx_ctrl &= ~(IO_MASK(R_SERIAL0_TR_CTRL, tr_bitnr) |
- IO_MASK(R_SERIAL0_TR_CTRL, tr_par_en) |
- IO_MASK(R_SERIAL0_TR_CTRL, tr_par) |
- IO_MASK(R_SERIAL0_TR_CTRL, stop_bits) |
- IO_MASK(R_SERIAL0_TR_CTRL, auto_cts));
-
- if ((cflag & CSIZE) == CS7) {
- /* set 7 bit mode */
- info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_bitnr, tr_7bit);
- info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_bitnr, rec_7bit);
- }
-
- if (cflag & CSTOPB) {
- /* set 2 stop bit mode */
- info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, stop_bits, two_bits);
- }
-
- if (cflag & PARENB) {
- /* enable parity */
- info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, enable);
- info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, enable);
- }
-
- if (cflag & CMSPAR) {
- /* enable stick parity, PARODD mean Mark which matches ETRAX */
- info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_stick_par, stick);
- info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_stick_par, stick);
- }
- if (cflag & PARODD) {
- /* set odd parity (or Mark if CMSPAR) */
- info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_par, odd);
- info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_par, odd);
- }
-
- if (cflag & CRTSCTS) {
- /* enable automatic CTS handling */
- DFLOW(DEBUG_LOG(info->line, "FLOW auto_cts enabled\n", 0));
- info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, auto_cts, active);
- }
-
- /* make sure the tx and rx are enabled */
-
- info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_enable, enable);
- info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable);
-
- /* actually write the control regs to the hardware */
-
- info->ioport[REG_TR_CTRL] = info->tx_ctrl;
- info->ioport[REG_REC_CTRL] = info->rx_ctrl;
- xoff = IO_FIELD(R_SERIAL0_XOFF, xoff_char, STOP_CHAR(info->port.tty));
- xoff |= IO_STATE(R_SERIAL0_XOFF, tx_stop, enable);
- if (info->port.tty->termios->c_iflag & IXON ) {
- DFLOW(DEBUG_LOG(info->line, "FLOW XOFF enabled 0x%02X\n",
- STOP_CHAR(info->port.tty)));
- xoff |= IO_STATE(R_SERIAL0_XOFF, auto_xoff, enable);
- }
-
- *((unsigned long *)&info->ioport[REG_XOFF]) = xoff;
- local_irq_restore(flags);
-#endif /* !CONFIG_SVINTO_SIM */
-
- update_char_time(info);
-
-} /* change_speed */
-
-/* start transmitting chars NOW */
-
-static void
-rs_flush_chars(struct tty_struct *tty)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- unsigned long flags;
-
- if (info->tr_running ||
- info->xmit.head == info->xmit.tail ||
- tty->stopped ||
- tty->hw_stopped ||
- !info->xmit.buf)
- return;
-
-#ifdef SERIAL_DEBUG_FLOW
- printk("rs_flush_chars\n");
-#endif
-
- /* this protection might not exactly be necessary here */
-
- local_irq_save(flags);
- start_transmit(info);
- local_irq_restore(flags);
-}
-
-static int rs_raw_write(struct tty_struct *tty,
- const unsigned char *buf, int count)
-{
- int c, ret = 0;
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- unsigned long flags;
-
- /* first some sanity checks */
-
- if (!tty || !info->xmit.buf || !tmp_buf)
- return 0;
-
-#ifdef SERIAL_DEBUG_DATA
- if (info->line == SERIAL_DEBUG_LINE)
- printk("rs_raw_write (%d), status %d\n",
- count, info->ioport[REG_STATUS]);
-#endif
-
-#ifdef CONFIG_SVINTO_SIM
- /* Really simple. The output is here and now. */
- SIMCOUT(buf, count);
- return count;
-#endif
- local_save_flags(flags);
- DFLOW(DEBUG_LOG(info->line, "write count %i ", count));
- DFLOW(DEBUG_LOG(info->line, "ldisc %i\n", tty->ldisc.chars_in_buffer(tty)));
-
-
- /* The local_irq_disable/restore_flags pairs below are needed
- * because the DMA interrupt handler moves the info->xmit values.
- * the memcpy needs to be in the critical region unfortunately,
- * because we need to read xmit values, memcpy, write xmit values
- * in one atomic operation... this could perhaps be avoided by
- * more clever design.
- */
- local_irq_disable();
- while (count) {
- c = CIRC_SPACE_TO_END(info->xmit.head,
- info->xmit.tail,
- SERIAL_XMIT_SIZE);
-
- if (count < c)
- c = count;
- if (c <= 0)
- break;
-
- memcpy(info->xmit.buf + info->xmit.head, buf, c);
- info->xmit.head = (info->xmit.head + c) &
- (SERIAL_XMIT_SIZE-1);
- buf += c;
- count -= c;
- ret += c;
- }
- local_irq_restore(flags);
-
- /* enable transmitter if not running, unless the tty is stopped
- * this does not need IRQ protection since if tr_running == 0
- * the IRQ's are not running anyway for this port.
- */
- DFLOW(DEBUG_LOG(info->line, "write ret %i\n", ret));
-
- if (info->xmit.head != info->xmit.tail &&
- !tty->stopped &&
- !tty->hw_stopped &&
- !info->tr_running) {
- start_transmit(info);
- }
-
- return ret;
-} /* raw_raw_write() */
-
-static int
-rs_write(struct tty_struct *tty,
- const unsigned char *buf, int count)
-{
-#if defined(CONFIG_ETRAX_RS485)
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
-
- if (info->rs485.flags & SER_RS485_ENABLED)
- {
- /* If we are in RS-485 mode, we need to toggle RTS and disable
- * the receiver before initiating a DMA transfer
- */
-#ifdef CONFIG_ETRAX_FAST_TIMER
- /* Abort any started timer */
- fast_timers_rs485[info->line].function = NULL;
- del_fast_timer(&fast_timers_rs485[info->line]);
-#endif
- e100_rts(info, (info->rs485.flags & SER_RS485_RTS_ON_SEND));
-#if defined(CONFIG_ETRAX_RS485_DISABLE_RECEIVER)
- e100_disable_rx(info);
- e100_enable_rx_irq(info);
-#endif
- if ((info->rs485.flags & SER_RS485_RTS_BEFORE_SEND) &&
- (info->rs485.delay_rts_before_send > 0))
- msleep(info->rs485.delay_rts_before_send);
- }
-#endif /* CONFIG_ETRAX_RS485 */
-
- count = rs_raw_write(tty, buf, count);
-
-#if defined(CONFIG_ETRAX_RS485)
- if (info->rs485.flags & SER_RS485_ENABLED)
- {
- unsigned int val;
- /* If we are in RS-485 mode the following has to be done:
- * wait until DMA is ready
- * wait on transmit shift register
- * toggle RTS
- * enable the receiver
- */
-
- /* Sleep until all sent */
- tty_wait_until_sent(tty, 0);
-#ifdef CONFIG_ETRAX_FAST_TIMER
- /* Now sleep a little more so that shift register is empty */
- schedule_usleep(info->char_time_usec * 2);
-#endif
- /* wait on transmit shift register */
- do{
- get_lsr_info(info, &val);
- }while (!(val & TIOCSER_TEMT));
-
- e100_rts(info, (info->rs485.flags & SER_RS485_RTS_AFTER_SEND));
-
-#if defined(CONFIG_ETRAX_RS485_DISABLE_RECEIVER)
- e100_enable_rx(info);
- e100_enable_rxdma_irq(info);
-#endif
- }
-#endif /* CONFIG_ETRAX_RS485 */
-
- return count;
-} /* rs_write */
-
-
-/* how much space is available in the xmit buffer? */
-
-static int
-rs_write_room(struct tty_struct *tty)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
-
- return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
-}
-
-/* How many chars are in the xmit buffer?
- * This does not include any chars in the transmitter FIFO.
- * Use wait_until_sent for waiting for FIFO drain.
- */
-
-static int
-rs_chars_in_buffer(struct tty_struct *tty)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
-
- return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
-}
-
-/* discard everything in the xmit buffer */
-
-static void
-rs_flush_buffer(struct tty_struct *tty)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- unsigned long flags;
-
- local_irq_save(flags);
- info->xmit.head = info->xmit.tail = 0;
- local_irq_restore(flags);
-
- tty_wakeup(tty);
-}
-
-/*
- * This function is used to send a high-priority XON/XOFF character to
- * the device
- *
- * Since we use DMA we don't check for info->x_char in transmit_chars_dma(),
- * but we do it in handle_ser_tx_interrupt().
- * We disable DMA channel and enable tx ready interrupt and write the
- * character when possible.
- */
-static void rs_send_xchar(struct tty_struct *tty, char ch)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- unsigned long flags;
- local_irq_save(flags);
- if (info->uses_dma_out) {
- /* Put the DMA on hold and disable the channel */
- *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, hold);
- while (IO_EXTRACT(R_DMA_CH6_CMD, cmd, *info->ocmdadr) !=
- IO_STATE_VALUE(R_DMA_CH6_CMD, cmd, hold));
- e100_disable_txdma_channel(info);
- }
-
- /* Must make sure transmitter is not stopped before we can transmit */
- if (tty->stopped)
- rs_start(tty);
-
- /* Enable manual transmit interrupt and send from there */
- DFLOW(DEBUG_LOG(info->line, "rs_send_xchar 0x%02X\n", ch));
- info->x_char = ch;
- e100_enable_serial_tx_ready_irq(info);
- local_irq_restore(flags);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_throttle()
- *
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void
-rs_throttle(struct tty_struct * tty)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
- char buf[64];
-
- printk("throttle %s: %lu....\n", tty_name(tty, buf),
- (unsigned long)tty->ldisc.chars_in_buffer(tty));
-#endif
- DFLOW(DEBUG_LOG(info->line,"rs_throttle %lu\n", tty->ldisc.chars_in_buffer(tty)));
-
- /* Do RTS before XOFF since XOFF might take some time */
- if (tty->termios->c_cflag & CRTSCTS) {
- /* Turn off RTS line */
- e100_rts(info, 0);
- }
- if (I_IXOFF(tty))
- rs_send_xchar(tty, STOP_CHAR(tty));
-
-}
-
-static void
-rs_unthrottle(struct tty_struct * tty)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
- char buf[64];
-
- printk("unthrottle %s: %lu....\n", tty_name(tty, buf),
- (unsigned long)tty->ldisc.chars_in_buffer(tty));
-#endif
- DFLOW(DEBUG_LOG(info->line,"rs_unthrottle ldisc %d\n", tty->ldisc.chars_in_buffer(tty)));
- DFLOW(DEBUG_LOG(info->line,"rs_unthrottle flip.count: %i\n", tty->flip.count));
- /* Do RTS before XOFF since XOFF might take some time */
- if (tty->termios->c_cflag & CRTSCTS) {
- /* Assert RTS line */
- e100_rts(info, 1);
- }
-
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- rs_send_xchar(tty, START_CHAR(tty));
- }
-
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static int
-get_serial_info(struct e100_serial * info,
- struct serial_struct * retinfo)
-{
- struct serial_struct tmp;
-
- /* this is all probably wrong, there are a lot of fields
- * here that we don't have in e100_serial and maybe we
- * should set them to something else than 0.
- */
-
- if (!retinfo)
- return -EFAULT;
- memset(&tmp, 0, sizeof(tmp));
- tmp.type = info->type;
- tmp.line = info->line;
- tmp.port = (int)info->ioport;
- tmp.irq = info->irq;
- tmp.flags = info->flags;
- tmp.baud_base = info->baud_base;
- tmp.close_delay = info->close_delay;
- tmp.closing_wait = info->closing_wait;
- tmp.custom_divisor = info->custom_divisor;
- if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
- return -EFAULT;
- return 0;
-}
-
-static int
-set_serial_info(struct e100_serial *info,
- struct serial_struct *new_info)
-{
- struct serial_struct new_serial;
- struct e100_serial old_info;
- int retval = 0;
-
- if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
- return -EFAULT;
-
- old_info = *info;
-
- if (!capable(CAP_SYS_ADMIN)) {
- if ((new_serial.type != info->type) ||
- (new_serial.close_delay != info->close_delay) ||
- ((new_serial.flags & ~ASYNC_USR_MASK) !=
- (info->flags & ~ASYNC_USR_MASK)))
- return -EPERM;
- info->flags = ((info->flags & ~ASYNC_USR_MASK) |
- (new_serial.flags & ASYNC_USR_MASK));
- goto check_and_exit;
- }
-
- if (info->count > 1)
- return -EBUSY;
-
- /*
- * OK, past this point, all the error checking has been done.
- * At this point, we start making changes.....
- */
-
- info->baud_base = new_serial.baud_base;
- info->flags = ((info->flags & ~ASYNC_FLAGS) |
- (new_serial.flags & ASYNC_FLAGS));
- info->custom_divisor = new_serial.custom_divisor;
- info->type = new_serial.type;
- info->close_delay = new_serial.close_delay;
- info->closing_wait = new_serial.closing_wait;
- info->port.tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
- check_and_exit:
- if (info->flags & ASYNC_INITIALIZED) {
- change_speed(info);
- } else
- retval = startup(info);
- return retval;
-}
-
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
-static int
-get_lsr_info(struct e100_serial * info, unsigned int *value)
-{
- unsigned int result = TIOCSER_TEMT;
-#ifndef CONFIG_SVINTO_SIM
- unsigned long curr_time = jiffies;
- unsigned long curr_time_usec = GET_JIFFIES_USEC();
- unsigned long elapsed_usec =
- (curr_time - info->last_tx_active) * 1000000/HZ +
- curr_time_usec - info->last_tx_active_usec;
-
- if (info->xmit.head != info->xmit.tail ||
- elapsed_usec < 2*info->char_time_usec) {
- result = 0;
- }
-#endif
-
- if (copy_to_user(value, &result, sizeof(int)))
- return -EFAULT;
- return 0;
-}
-
-#ifdef SERIAL_DEBUG_IO
-struct state_str
-{
- int state;
- const char *str;
-};
-
-const struct state_str control_state_str[] = {
- {TIOCM_DTR, "DTR" },
- {TIOCM_RTS, "RTS"},
- {TIOCM_ST, "ST?" },
- {TIOCM_SR, "SR?" },
- {TIOCM_CTS, "CTS" },
- {TIOCM_CD, "CD" },
- {TIOCM_RI, "RI" },
- {TIOCM_DSR, "DSR" },
- {0, NULL }
-};
-
-char *get_control_state_str(int MLines, char *s)
-{
- int i = 0;
-
- s[0]='\0';
- while (control_state_str[i].str != NULL) {
- if (MLines & control_state_str[i].state) {
- if (s[0] != '\0') {
- strcat(s, ", ");
- }
- strcat(s, control_state_str[i].str);
- }
- i++;
- }
- return s;
-}
-#endif
-
-static int
-rs_break(struct tty_struct *tty, int break_state)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- unsigned long flags;
-
- if (!info->ioport)
- return -EIO;
-
- local_irq_save(flags);
- if (break_state == -1) {
- /* Go to manual mode and set the txd pin to 0 */
- /* Clear bit 7 (txd) and 6 (tr_enable) */
- info->tx_ctrl &= 0x3F;
- } else {
- /* Set bit 7 (txd) and 6 (tr_enable) */
- info->tx_ctrl |= (0x80 | 0x40);
- }
- info->ioport[REG_TR_CTRL] = info->tx_ctrl;
- local_irq_restore(flags);
- return 0;
-}
-
-static int
-rs_tiocmset(struct tty_struct *tty, struct file *file,
- unsigned int set, unsigned int clear)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- unsigned long flags;
-
- local_irq_save(flags);
-
- if (clear & TIOCM_RTS)
- e100_rts(info, 0);
- if (clear & TIOCM_DTR)
- e100_dtr(info, 0);
- /* Handle FEMALE behaviour */
- if (clear & TIOCM_RI)
- e100_ri_out(info, 0);
- if (clear & TIOCM_CD)
- e100_cd_out(info, 0);
-
- if (set & TIOCM_RTS)
- e100_rts(info, 1);
- if (set & TIOCM_DTR)
- e100_dtr(info, 1);
- /* Handle FEMALE behaviour */
- if (set & TIOCM_RI)
- e100_ri_out(info, 1);
- if (set & TIOCM_CD)
- e100_cd_out(info, 1);
-
- local_irq_restore(flags);
- return 0;
-}
-
-static int
-rs_tiocmget(struct tty_struct *tty, struct file *file)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- unsigned int result;
- unsigned long flags;
-
- local_irq_save(flags);
-
- result =
- (!E100_RTS_GET(info) ? TIOCM_RTS : 0)
- | (!E100_DTR_GET(info) ? TIOCM_DTR : 0)
- | (!E100_RI_GET(info) ? TIOCM_RNG : 0)
- | (!E100_DSR_GET(info) ? TIOCM_DSR : 0)
- | (!E100_CD_GET(info) ? TIOCM_CAR : 0)
- | (!E100_CTS_GET(info) ? TIOCM_CTS : 0);
-
- local_irq_restore(flags);
-
-#ifdef SERIAL_DEBUG_IO
- printk(KERN_DEBUG "ser%i: modem state: %i 0x%08X\n",
- info->line, result, result);
- {
- char s[100];
-
- get_control_state_str(result, s);
- printk(KERN_DEBUG "state: %s\n", s);
- }
-#endif
- return result;
-
-}
-
-
-static int
-rs_ioctl(struct tty_struct *tty, struct file * file,
- unsigned int cmd, unsigned long arg)
-{
- struct e100_serial * info = (struct e100_serial *)tty->driver_data;
-
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
- (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
-
- switch (cmd) {
- case TIOCGSERIAL:
- return get_serial_info(info,
- (struct serial_struct *) arg);
- case TIOCSSERIAL:
- return set_serial_info(info,
- (struct serial_struct *) arg);
- case TIOCSERGETLSR: /* Get line status register */
- return get_lsr_info(info, (unsigned int *) arg);
-
- case TIOCSERGSTRUCT:
- if (copy_to_user((struct e100_serial *) arg,
- info, sizeof(struct e100_serial)))
- return -EFAULT;
- return 0;
-
-#if defined(CONFIG_ETRAX_RS485)
- case TIOCSERSETRS485:
- {
- /* In this ioctl we still use the old structure
- * rs485_control for backward compatibility
- * (if we use serial_rs485, then old user-level code
- * wouldn't work anymore...).
- * The use of this ioctl is deprecated: use TIOCSRS485
- * instead.*/
- struct rs485_control rs485ctrl;
- struct serial_rs485 rs485data;
- printk(KERN_DEBUG "The use of this ioctl is deprecated. Use TIOCSRS485 instead\n");
- if (copy_from_user(&rs485ctrl, (struct rs485_control *)arg,
- sizeof(rs485ctrl)))
- return -EFAULT;
-
- rs485data.delay_rts_before_send = rs485ctrl.delay_rts_before_send;
- rs485data.flags = 0;
- if (rs485data.delay_rts_before_send != 0)
- rs485data.flags |= SER_RS485_RTS_BEFORE_SEND;
- else
- rs485data.flags &= ~(SER_RS485_RTS_BEFORE_SEND);
-
- if (rs485ctrl.enabled)
- rs485data.flags |= SER_RS485_ENABLED;
- else
- rs485data.flags &= ~(SER_RS485_ENABLED);
-
- if (rs485ctrl.rts_on_send)
- rs485data.flags |= SER_RS485_RTS_ON_SEND;
- else
- rs485data.flags &= ~(SER_RS485_RTS_ON_SEND);
-
- if (rs485ctrl.rts_after_sent)
- rs485data.flags |= SER_RS485_RTS_AFTER_SEND;
- else
- rs485data.flags &= ~(SER_RS485_RTS_AFTER_SEND);
-
- return e100_enable_rs485(tty, &rs485data);
- }
-
- case TIOCSRS485:
- {
- /* This is the new version of TIOCSRS485, with new
- * data structure serial_rs485 */
- struct serial_rs485 rs485data;
- if (copy_from_user(&rs485data, (struct rs485_control *)arg,
- sizeof(rs485data)))
- return -EFAULT;
-
- return e100_enable_rs485(tty, &rs485data);
- }
-
- case TIOCGRS485:
- {
- struct serial_rs485 *rs485data =
- &(((struct e100_serial *)tty->driver_data)->rs485);
- /* This is the ioctl to get RS485 data from user-space */
- if (copy_to_user((struct serial_rs485 *) arg,
- rs485data,
- sizeof(struct serial_rs485)))
- return -EFAULT;
- break;
- }
-
- case TIOCSERWRRS485:
- {
- struct rs485_write rs485wr;
- if (copy_from_user(&rs485wr, (struct rs485_write *)arg,
- sizeof(rs485wr)))
- return -EFAULT;
-
- return e100_write_rs485(tty, rs485wr.outc, rs485wr.outc_size);
- }
-#endif
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-static void
-rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
-
- change_speed(info);
-
- /* Handle turning off CRTSCTS */
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- rs_start(tty);
- }
-
-}
-
-/*
- * ------------------------------------------------------------
- * rs_close()
- *
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we unlink its
- * S structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- * ------------------------------------------------------------
- */
-static void
-rs_close(struct tty_struct *tty, struct file * filp)
-{
- struct e100_serial * info = (struct e100_serial *)tty->driver_data;
- unsigned long flags;
-
- if (!info)
- return;
-
- /* interrupts are disabled for this entire function */
-
- local_irq_save(flags);
-
- if (tty_hung_up_p(filp)) {
- local_irq_restore(flags);
- return;
- }
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("[%d] rs_close ttyS%d, count = %d\n", current->pid,
- info->line, info->count);
-#endif
- if ((tty->count == 1) && (info->count != 1)) {
- /*
- * Uh, oh. tty->count is 1, which means that the tty
- * structure will be freed. Info->count should always
- * be one in these conditions. If it's greater than
- * one, we've got real problems, since it means the
- * serial port won't be shutdown.
- */
- printk(KERN_CRIT
- "rs_close: bad serial port count; tty->count is 1, "
- "info->count is %d\n", info->count);
- info->count = 1;
- }
- if (--info->count < 0) {
- printk(KERN_CRIT "rs_close: bad serial port count for ttyS%d: %d\n",
- info->line, info->count);
- info->count = 0;
- }
- if (info->count) {
- local_irq_restore(flags);
- return;
- }
- info->flags |= ASYNC_CLOSING;
- /*
- * Save the termios structure, since this port may have
- * separate termios for callout and dialin.
- */
- if (info->flags & ASYNC_NORMAL_ACTIVE)
- info->normal_termios = *tty->termios;
- /*
- * Now we wait for the transmit buffer to clear; and we notify
- * the line discipline to only process XON/XOFF characters.
- */
- tty->closing = 1;
- if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, info->closing_wait);
- /*
- * At this point we stop accepting input. To do this, we
- * disable the serial receiver and the DMA receive interrupt.
- */
-#ifdef SERIAL_HANDLE_EARLY_ERRORS
- e100_disable_serial_data_irq(info);
-#endif
-
-#ifndef CONFIG_SVINTO_SIM
- e100_disable_rx(info);
- e100_disable_rx_irq(info);
-
- if (info->flags & ASYNC_INITIALIZED) {
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important as we have a transmit FIFO!
- */
- rs_wait_until_sent(tty, HZ);
- }
-#endif
-
- shutdown(info);
- rs_flush_buffer(tty);
- tty_ldisc_flush(tty);
- tty->closing = 0;
- info->event = 0;
- info->port.tty = NULL;
- if (info->blocked_open) {
- if (info->close_delay)
- schedule_timeout_interruptible(info->close_delay);
- wake_up_interruptible(&info->open_wait);
- }
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&info->close_wait);
- local_irq_restore(flags);
-
- /* port closed */
-
-#if defined(CONFIG_ETRAX_RS485)
- if (info->rs485.flags & SER_RS485_ENABLED) {
- info->rs485.flags &= ~(SER_RS485_ENABLED);
-#if defined(CONFIG_ETRAX_RS485_ON_PA)
- *R_PORT_PA_DATA = port_pa_data_shadow &= ~(1 << rs485_pa_bit);
-#endif
-#if defined(CONFIG_ETRAX_RS485_ON_PORT_G)
- REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow,
- rs485_port_g_bit, 0);
-#endif
-#if defined(CONFIG_ETRAX_RS485_LTC1387)
- REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow,
- CONFIG_ETRAX_RS485_LTC1387_DXEN_PORT_G_BIT, 0);
- REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow,
- CONFIG_ETRAX_RS485_LTC1387_RXEN_PORT_G_BIT, 0);
-#endif
- }
-#endif
-
- /*
- * Release any allocated DMA irq's.
- */
- if (info->dma_in_enabled) {
- free_irq(info->dma_in_irq_nbr, info);
- cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
- info->uses_dma_in = 0;
-#ifdef SERIAL_DEBUG_OPEN
- printk(KERN_DEBUG "DMA irq '%s' freed\n",
- info->dma_in_irq_description);
-#endif
- }
- if (info->dma_out_enabled) {
- free_irq(info->dma_out_irq_nbr, info);
- cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
- info->uses_dma_out = 0;
-#ifdef SERIAL_DEBUG_OPEN
- printk(KERN_DEBUG "DMA irq '%s' freed\n",
- info->dma_out_irq_description);
-#endif
- }
-}
-
-/*
- * rs_wait_until_sent() --- wait until the transmitter is empty
- */
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- unsigned long orig_jiffies;
- struct e100_serial *info = (struct e100_serial *)tty->driver_data;
- unsigned long curr_time = jiffies;
- unsigned long curr_time_usec = GET_JIFFIES_USEC();
- long elapsed_usec =
- (curr_time - info->last_tx_active) * (1000000/HZ) +
- curr_time_usec - info->last_tx_active_usec;
-
- /*
- * Check R_DMA_CHx_STATUS bit 0-6=number of available bytes in FIFO
- * R_DMA_CHx_HWSW bit 31-16=nbr of bytes left in DMA buffer (0=64k)
- */
- orig_jiffies = jiffies;
- while (info->xmit.head != info->xmit.tail || /* More in send queue */
- (*info->ostatusadr & 0x007f) || /* more in FIFO */
- (elapsed_usec < 2*info->char_time_usec)) {
- schedule_timeout_interruptible(1);
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- curr_time = jiffies;
- curr_time_usec = GET_JIFFIES_USEC();
- elapsed_usec =
- (curr_time - info->last_tx_active) * (1000000/HZ) +
- curr_time_usec - info->last_tx_active_usec;
- }
- set_current_state(TASK_RUNNING);
-}
-
-/*
- * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-void
-rs_hangup(struct tty_struct *tty)
-{
- struct e100_serial * info = (struct e100_serial *)tty->driver_data;
-
- rs_flush_buffer(tty);
- shutdown(info);
- info->event = 0;
- info->count = 0;
- info->flags &= ~ASYNC_NORMAL_ACTIVE;
- info->port.tty = NULL;
- wake_up_interruptible(&info->open_wait);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_open() and friends
- * ------------------------------------------------------------
- */
-static int
-block_til_ready(struct tty_struct *tty, struct file * filp,
- struct e100_serial *info)
-{
- DECLARE_WAITQUEUE(wait, current);
- unsigned long flags;
- int retval;
- int do_clocal = 0, extra_count = 0;
-
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- wait_event_interruptible_tty(info->close_wait,
- !(info->flags & ASYNC_CLOSING));
-#ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
- return -EAGAIN;
- else
- return -ERESTARTSYS;
-#else
- return -EAGAIN;
-#endif
- }
-
- /*
- * If non-blocking mode is set, or the port is not enabled,
- * then make the check up front and then exit.
- */
- if ((filp->f_flags & O_NONBLOCK) ||
- (tty->flags & (1 << TTY_IO_ERROR))) {
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
-
- if (tty->termios->c_cflag & CLOCAL) {
- do_clocal = 1;
- }
-
- /*
- * Block waiting for the carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, info->count is dropped by one, so that
- * rs_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
- retval = 0;
- add_wait_queue(&info->open_wait, &wait);
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready before block: ttyS%d, count = %d\n",
- info->line, info->count);
-#endif
- local_irq_save(flags);
- if (!tty_hung_up_p(filp)) {
- extra_count++;
- info->count--;
- }
- local_irq_restore(flags);
- info->blocked_open++;
- while (1) {
- local_irq_save(flags);
- /* assert RTS and DTR */
- e100_rts(info, 1);
- e100_dtr(info, 1);
- local_irq_restore(flags);
- set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) ||
- !(info->flags & ASYNC_INITIALIZED)) {
-#ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
-#else
- retval = -EAGAIN;
-#endif
- break;
- }
- if (!(info->flags & ASYNC_CLOSING) && do_clocal)
- /* && (do_clocal || DCD_IS_ASSERTED) */
- break;
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready blocking: ttyS%d, count = %d\n",
- info->line, info->count);
-#endif
- tty_unlock();
- schedule();
- tty_lock();
- }
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&info->open_wait, &wait);
- if (extra_count)
- info->count++;
- info->blocked_open--;
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready after blocking: ttyS%d, count = %d\n",
- info->line, info->count);
-#endif
- if (retval)
- return retval;
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
-}
-
-static void
-deinit_port(struct e100_serial *info)
-{
- if (info->dma_out_enabled) {
- cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
- free_irq(info->dma_out_irq_nbr, info);
- }
- if (info->dma_in_enabled) {
- cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
- free_irq(info->dma_in_irq_nbr, info);
- }
-}
-
-/*
- * This routine is called whenever a serial port is opened.
- * It performs the serial-specific initialization for the tty structure.
- */
-static int
-rs_open(struct tty_struct *tty, struct file * filp)
-{
- struct e100_serial *info;
- int retval, line;
- unsigned long page;
- int allocated_resources = 0;
-
- /* find which port we want to open */
- line = tty->index;
-
- if (line < 0 || line >= NR_PORTS)
- return -ENODEV;
-
- /* find the corresponding e100_serial struct in the table */
- info = rs_table + line;
-
- /* don't allow the opening of ports that are not enabled in the HW config */
- if (!info->enabled)
- return -ENODEV;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("[%d] rs_open %s, count = %d\n", current->pid, tty->name,
- info->count);
-#endif
-
- info->count++;
- tty->driver_data = info;
- info->port.tty = tty;
-
- info->port.tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
- if (!tmp_buf) {
- page = get_zeroed_page(GFP_KERNEL);
- if (!page) {
- return -ENOMEM;
- }
- if (tmp_buf)
- free_page(page);
- else
- tmp_buf = (unsigned char *) page;
- }
-
- /*
- * If the port is in the middle of closing, bail out now
- */
- if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- wait_event_interruptible_tty(info->close_wait,
- !(info->flags & ASYNC_CLOSING));
-#ifdef SERIAL_DO_RESTART
- return ((info->flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
-#else
- return -EAGAIN;
-#endif
- }
-
- /*
- * If DMA is enabled try to allocate the irq's.
- */
- if (info->count == 1) {
- allocated_resources = 1;
- if (info->dma_in_enabled) {
- if (request_irq(info->dma_in_irq_nbr,
- rec_interrupt,
- info->dma_in_irq_flags,
- info->dma_in_irq_description,
- info)) {
- printk(KERN_WARNING "DMA irq '%s' busy; "
- "falling back to non-DMA mode\n",
- info->dma_in_irq_description);
- /* Make sure we never try to use DMA in */
- /* for the port again. */
- info->dma_in_enabled = 0;
- } else if (cris_request_dma(info->dma_in_nbr,
- info->dma_in_irq_description,
- DMA_VERBOSE_ON_ERROR,
- info->dma_owner)) {
- free_irq(info->dma_in_irq_nbr, info);
- printk(KERN_WARNING "DMA '%s' busy; "
- "falling back to non-DMA mode\n",
- info->dma_in_irq_description);
- /* Make sure we never try to use DMA in */
- /* for the port again. */
- info->dma_in_enabled = 0;
- }
-#ifdef SERIAL_DEBUG_OPEN
- else
- printk(KERN_DEBUG "DMA irq '%s' allocated\n",
- info->dma_in_irq_description);
-#endif
- }
- if (info->dma_out_enabled) {
- if (request_irq(info->dma_out_irq_nbr,
- tr_interrupt,
- info->dma_out_irq_flags,
- info->dma_out_irq_description,
- info)) {
- printk(KERN_WARNING "DMA irq '%s' busy; "
- "falling back to non-DMA mode\n",
- info->dma_out_irq_description);
- /* Make sure we never try to use DMA out */
- /* for the port again. */
- info->dma_out_enabled = 0;
- } else if (cris_request_dma(info->dma_out_nbr,
- info->dma_out_irq_description,
- DMA_VERBOSE_ON_ERROR,
- info->dma_owner)) {
- free_irq(info->dma_out_irq_nbr, info);
- printk(KERN_WARNING "DMA '%s' busy; "
- "falling back to non-DMA mode\n",
- info->dma_out_irq_description);
- /* Make sure we never try to use DMA out */
- /* for the port again. */
- info->dma_out_enabled = 0;
- }
-#ifdef SERIAL_DEBUG_OPEN
- else
- printk(KERN_DEBUG "DMA irq '%s' allocated\n",
- info->dma_out_irq_description);
-#endif
- }
- }
-
- /*
- * Start up the serial port
- */
-
- retval = startup(info);
- if (retval) {
- if (allocated_resources)
- deinit_port(info);
-
- /* FIXME Decrease count info->count here too? */
- return retval;
- }
-
-
- retval = block_til_ready(tty, filp, info);
- if (retval) {
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open returning after block_til_ready with %d\n",
- retval);
-#endif
- if (allocated_resources)
- deinit_port(info);
-
- return retval;
- }
-
- if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
- *tty->termios = info->normal_termios;
- change_speed(info);
- }
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open ttyS%d successful...\n", info->line);
-#endif
- DLOG_INT_TRIG( log_int_pos = 0);
-
- DFLIP( if (info->line == SERIAL_DEBUG_LINE) {
- info->icount.rx = 0;
- } );
-
- return 0;
-}
-
-#ifdef CONFIG_PROC_FS
-/*
- * /proc fs routines....
- */
-
-static void seq_line_info(struct seq_file *m, struct e100_serial *info)
-{
- unsigned long tmp;
-
- seq_printf(m, "%d: uart:E100 port:%lX irq:%d",
- info->line, (unsigned long)info->ioport, info->irq);
-
- if (!info->ioport || (info->type == PORT_UNKNOWN)) {
- seq_printf(m, "\n");
- return;
- }
-
- seq_printf(m, " baud:%d", info->baud);
- seq_printf(m, " tx:%lu rx:%lu",
- (unsigned long)info->icount.tx,
- (unsigned long)info->icount.rx);
- tmp = CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
- if (tmp)
- seq_printf(m, " tx_pend:%lu/%lu",
- (unsigned long)tmp,
- (unsigned long)SERIAL_XMIT_SIZE);
-
- seq_printf(m, " rx_pend:%lu/%lu",
- (unsigned long)info->recv_cnt,
- (unsigned long)info->max_recv_cnt);
-
-#if 1
- if (info->port.tty) {
- if (info->port.tty->stopped)
- seq_printf(m, " stopped:%i",
- (int)info->port.tty->stopped);
- if (info->port.tty->hw_stopped)
- seq_printf(m, " hw_stopped:%i",
- (int)info->port.tty->hw_stopped);
- }
-
- {
- unsigned char rstat = info->ioport[REG_STATUS];
- if (rstat & IO_MASK(R_SERIAL0_STATUS, xoff_detect))
- seq_printf(m, " xoff_detect:1");
- }
-
-#endif
-
- if (info->icount.frame)
- seq_printf(m, " fe:%lu", (unsigned long)info->icount.frame);
-
- if (info->icount.parity)
- seq_printf(m, " pe:%lu", (unsigned long)info->icount.parity);
-
- if (info->icount.brk)
- seq_printf(m, " brk:%lu", (unsigned long)info->icount.brk);
-
- if (info->icount.overrun)
- seq_printf(m, " oe:%lu", (unsigned long)info->icount.overrun);
-
- /*
- * Last thing is the RS-232 status lines
- */
- if (!E100_RTS_GET(info))
- seq_puts(m, "|RTS");
- if (!E100_CTS_GET(info))
- seq_puts(m, "|CTS");
- if (!E100_DTR_GET(info))
- seq_puts(m, "|DTR");
- if (!E100_DSR_GET(info))
- seq_puts(m, "|DSR");
- if (!E100_CD_GET(info))
- seq_puts(m, "|CD");
- if (!E100_RI_GET(info))
- seq_puts(m, "|RI");
- seq_puts(m, "\n");
-}
-
-
-static int crisv10_proc_show(struct seq_file *m, void *v)
-{
- int i;
-
- seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version);
-
- for (i = 0; i < NR_PORTS; i++) {
- if (!rs_table[i].enabled)
- continue;
- seq_line_info(m, &rs_table[i]);
- }
-#ifdef DEBUG_LOG_INCLUDED
- for (i = 0; i < debug_log_pos; i++) {
- seq_printf(m, "%-4i %lu.%lu ",
- i, debug_log[i].time,
- timer_data_to_ns(debug_log[i].timer_data));
- seq_printf(m, debug_log[i].string, debug_log[i].value);
- }
- seq_printf(m, "debug_log %i/%i\n", i, DEBUG_LOG_SIZE);
- debug_log_pos = 0;
-#endif
- return 0;
-}
-
-static int crisv10_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, crisv10_proc_show, NULL);
-}
-
-static const struct file_operations crisv10_proc_fops = {
- .owner = THIS_MODULE,
- .open = crisv10_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-#endif
-
-
-/* Finally, routines used to initialize the serial driver. */
-
-static void show_serial_version(void)
-{
- printk(KERN_INFO
- "ETRAX 100LX serial-driver %s, "
- "(c) 2000-2004 Axis Communications AB\r\n",
- &serial_version[11]); /* "$Revision: x.yy" */
-}
-
-/* rs_init inits the driver at boot (using the module_init chain) */
-
-static const struct tty_operations rs_ops = {
- .open = rs_open,
- .close = rs_close,
- .write = rs_write,
- .flush_chars = rs_flush_chars,
- .write_room = rs_write_room,
- .chars_in_buffer = rs_chars_in_buffer,
- .flush_buffer = rs_flush_buffer,
- .ioctl = rs_ioctl,
- .throttle = rs_throttle,
- .unthrottle = rs_unthrottle,
- .set_termios = rs_set_termios,
- .stop = rs_stop,
- .start = rs_start,
- .hangup = rs_hangup,
- .break_ctl = rs_break,
- .send_xchar = rs_send_xchar,
- .wait_until_sent = rs_wait_until_sent,
- .tiocmget = rs_tiocmget,
- .tiocmset = rs_tiocmset,
-#ifdef CONFIG_PROC_FS
- .proc_fops = &crisv10_proc_fops,
-#endif
-};
-
-static int __init rs_init(void)
-{
- int i;
- struct e100_serial *info;
- struct tty_driver *driver = alloc_tty_driver(NR_PORTS);
-
- if (!driver)
- return -ENOMEM;
-
- show_serial_version();
-
- /* Setup the timed flush handler system */
-
-#if !defined(CONFIG_ETRAX_SERIAL_FAST_TIMER)
- setup_timer(&flush_timer, timed_flush_handler, 0);
- mod_timer(&flush_timer, jiffies + 5);
-#endif
-
-#if defined(CONFIG_ETRAX_RS485)
-#if defined(CONFIG_ETRAX_RS485_ON_PA)
- if (cris_io_interface_allocate_pins(if_ser0, 'a', rs485_pa_bit,
- rs485_pa_bit)) {
- printk(KERN_CRIT "ETRAX100LX serial: Could not allocate "
- "RS485 pin\n");
- put_tty_driver(driver);
- return -EBUSY;
- }
-#endif
-#if defined(CONFIG_ETRAX_RS485_ON_PORT_G)
- if (cris_io_interface_allocate_pins(if_ser0, 'g', rs485_pa_bit,
- rs485_port_g_bit)) {
- printk(KERN_CRIT "ETRAX100LX serial: Could not allocate "
- "RS485 pin\n");
- put_tty_driver(driver);
- return -EBUSY;
- }
-#endif
-#endif
-
- /* Initialize the tty_driver structure */
-
- driver->driver_name = "serial";
- driver->name = "ttyS";
- driver->major = TTY_MAJOR;
- driver->minor_start = 64;
- driver->type = TTY_DRIVER_TYPE_SERIAL;
- driver->subtype = SERIAL_TYPE_NORMAL;
- driver->init_termios = tty_std_termios;
- driver->init_termios.c_cflag =
- B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */
- driver->init_termios.c_ispeed = 115200;
- driver->init_termios.c_ospeed = 115200;
- driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-
- tty_set_operations(driver, &rs_ops);
- serial_driver = driver;
- if (tty_register_driver(driver))
- panic("Couldn't register serial driver\n");
- /* do some initializing for the separate ports */
-
- for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) {
- if (info->enabled) {
- if (cris_request_io_interface(info->io_if,
- info->io_if_description)) {
- printk(KERN_CRIT "ETRAX100LX async serial: "
- "Could not allocate IO pins for "
- "%s, port %d\n",
- info->io_if_description, i);
- info->enabled = 0;
- }
- }
- info->uses_dma_in = 0;
- info->uses_dma_out = 0;
- info->line = i;
- info->port.tty = NULL;
- info->type = PORT_ETRAX;
- info->tr_running = 0;
- info->forced_eop = 0;
- info->baud_base = DEF_BAUD_BASE;
- info->custom_divisor = 0;
- info->flags = 0;
- info->close_delay = 5*HZ/10;
- info->closing_wait = 30*HZ;
- info->x_char = 0;
- info->event = 0;
- info->count = 0;
- info->blocked_open = 0;
- info->normal_termios = driver->init_termios;
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
- info->xmit.buf = NULL;
- info->xmit.tail = info->xmit.head = 0;
- info->first_recv_buffer = info->last_recv_buffer = NULL;
- info->recv_cnt = info->max_recv_cnt = 0;
- info->last_tx_active_usec = 0;
- info->last_tx_active = 0;
-
-#if defined(CONFIG_ETRAX_RS485)
- /* Set sane defaults */
- info->rs485.flags &= ~(SER_RS485_RTS_ON_SEND);
- info->rs485.flags |= SER_RS485_RTS_AFTER_SEND;
- info->rs485.flags &= ~(SER_RS485_RTS_BEFORE_SEND);
- info->rs485.delay_rts_before_send = 0;
- info->rs485.flags &= ~(SER_RS485_ENABLED);
-#endif
- INIT_WORK(&info->work, do_softint);
-
- if (info->enabled) {
- printk(KERN_INFO "%s%d at %p is a builtin UART with DMA\n",
- serial_driver->name, info->line, info->ioport);
- }
- }
-#ifdef CONFIG_ETRAX_FAST_TIMER
-#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
- memset(fast_timers, 0, sizeof(fast_timers));
-#endif
-#ifdef CONFIG_ETRAX_RS485
- memset(fast_timers_rs485, 0, sizeof(fast_timers_rs485));
-#endif
- fast_timer_init();
-#endif
-
-#ifndef CONFIG_SVINTO_SIM
-#ifndef CONFIG_ETRAX_KGDB
- /* Not needed in simulator. May only complicate stuff. */
- /* hook the irq's for DMA channel 6 and 7, serial output and input, and some more... */
-
- if (request_irq(SERIAL_IRQ_NBR, ser_interrupt,
- IRQF_SHARED | IRQF_DISABLED, "serial ", driver))
- panic("%s: Failed to request irq8", __func__);
-
-#endif
-#endif /* CONFIG_SVINTO_SIM */
-
- return 0;
-}
-
-/* this makes sure that rs_init is called during kernel boot */
-
-module_init(rs_init);
git.samba.org / sfrench / cifs-2.6.git / blobdiff