+++ /dev/null
-/*
- * drivers/serial/serial_txx9.c
- *
- * Derived from many drivers using generic_serial interface,
- * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c
- * (was in Linux/VR tree) by Jim Pick.
- *
- * Copyright (C) 1999 Harald Koerfgen
- * Copyright (C) 2000 Jim Pick <jim@jimpick.com>
- * Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
- * Copyright (C) 2000-2002 Toshiba Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
- */
-
-#if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/pci.h>
-#include <linux/serial_core.h>
-#include <linux/serial.h>
-
-#include <asm/io.h>
-
-static char *serial_version = "1.11";
-static char *serial_name = "TX39/49 Serial driver";
-
-#define PASS_LIMIT 256
-
-#if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
-/* "ttyS" is used for standard serial driver */
-#define TXX9_TTY_NAME "ttyTX"
-#define TXX9_TTY_MINOR_START 196
-#define TXX9_TTY_MAJOR 204
-#else
-/* acts like standard serial driver */
-#define TXX9_TTY_NAME "ttyS"
-#define TXX9_TTY_MINOR_START 64
-#define TXX9_TTY_MAJOR TTY_MAJOR
-#endif
-
-/* flag aliases */
-#define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART
-#define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER
-
-#ifdef CONFIG_PCI
-/* support for Toshiba TC86C001 SIO */
-#define ENABLE_SERIAL_TXX9_PCI
-#endif
-
-/*
- * Number of serial ports
- */
-#define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS
-
-struct uart_txx9_port {
- struct uart_port port;
- /* No additional info for now */
-};
-
-#define TXX9_REGION_SIZE 0x24
-
-/* TXX9 Serial Registers */
-#define TXX9_SILCR 0x00
-#define TXX9_SIDICR 0x04
-#define TXX9_SIDISR 0x08
-#define TXX9_SICISR 0x0c
-#define TXX9_SIFCR 0x10
-#define TXX9_SIFLCR 0x14
-#define TXX9_SIBGR 0x18
-#define TXX9_SITFIFO 0x1c
-#define TXX9_SIRFIFO 0x20
-
-/* SILCR : Line Control */
-#define TXX9_SILCR_SCS_MASK 0x00000060
-#define TXX9_SILCR_SCS_IMCLK 0x00000000
-#define TXX9_SILCR_SCS_IMCLK_BG 0x00000020
-#define TXX9_SILCR_SCS_SCLK 0x00000040
-#define TXX9_SILCR_SCS_SCLK_BG 0x00000060
-#define TXX9_SILCR_UEPS 0x00000010
-#define TXX9_SILCR_UPEN 0x00000008
-#define TXX9_SILCR_USBL_MASK 0x00000004
-#define TXX9_SILCR_USBL_1BIT 0x00000000
-#define TXX9_SILCR_USBL_2BIT 0x00000004
-#define TXX9_SILCR_UMODE_MASK 0x00000003
-#define TXX9_SILCR_UMODE_8BIT 0x00000000
-#define TXX9_SILCR_UMODE_7BIT 0x00000001
-
-/* SIDICR : DMA/Int. Control */
-#define TXX9_SIDICR_TDE 0x00008000
-#define TXX9_SIDICR_RDE 0x00004000
-#define TXX9_SIDICR_TIE 0x00002000
-#define TXX9_SIDICR_RIE 0x00001000
-#define TXX9_SIDICR_SPIE 0x00000800
-#define TXX9_SIDICR_CTSAC 0x00000600
-#define TXX9_SIDICR_STIE_MASK 0x0000003f
-#define TXX9_SIDICR_STIE_OERS 0x00000020
-#define TXX9_SIDICR_STIE_CTSS 0x00000010
-#define TXX9_SIDICR_STIE_RBRKD 0x00000008
-#define TXX9_SIDICR_STIE_TRDY 0x00000004
-#define TXX9_SIDICR_STIE_TXALS 0x00000002
-#define TXX9_SIDICR_STIE_UBRKD 0x00000001
-
-/* SIDISR : DMA/Int. Status */
-#define TXX9_SIDISR_UBRK 0x00008000
-#define TXX9_SIDISR_UVALID 0x00004000
-#define TXX9_SIDISR_UFER 0x00002000
-#define TXX9_SIDISR_UPER 0x00001000
-#define TXX9_SIDISR_UOER 0x00000800
-#define TXX9_SIDISR_ERI 0x00000400
-#define TXX9_SIDISR_TOUT 0x00000200
-#define TXX9_SIDISR_TDIS 0x00000100
-#define TXX9_SIDISR_RDIS 0x00000080
-#define TXX9_SIDISR_STIS 0x00000040
-#define TXX9_SIDISR_RFDN_MASK 0x0000001f
-
-/* SICISR : Change Int. Status */
-#define TXX9_SICISR_OERS 0x00000020
-#define TXX9_SICISR_CTSS 0x00000010
-#define TXX9_SICISR_RBRKD 0x00000008
-#define TXX9_SICISR_TRDY 0x00000004
-#define TXX9_SICISR_TXALS 0x00000002
-#define TXX9_SICISR_UBRKD 0x00000001
-
-/* SIFCR : FIFO Control */
-#define TXX9_SIFCR_SWRST 0x00008000
-#define TXX9_SIFCR_RDIL_MASK 0x00000180
-#define TXX9_SIFCR_RDIL_1 0x00000000
-#define TXX9_SIFCR_RDIL_4 0x00000080
-#define TXX9_SIFCR_RDIL_8 0x00000100
-#define TXX9_SIFCR_RDIL_12 0x00000180
-#define TXX9_SIFCR_RDIL_MAX 0x00000180
-#define TXX9_SIFCR_TDIL_MASK 0x00000018
-#define TXX9_SIFCR_TDIL_MASK 0x00000018
-#define TXX9_SIFCR_TDIL_1 0x00000000
-#define TXX9_SIFCR_TDIL_4 0x00000001
-#define TXX9_SIFCR_TDIL_8 0x00000010
-#define TXX9_SIFCR_TDIL_MAX 0x00000010
-#define TXX9_SIFCR_TFRST 0x00000004
-#define TXX9_SIFCR_RFRST 0x00000002
-#define TXX9_SIFCR_FRSTE 0x00000001
-#define TXX9_SIO_TX_FIFO 8
-#define TXX9_SIO_RX_FIFO 16
-
-/* SIFLCR : Flow Control */
-#define TXX9_SIFLCR_RCS 0x00001000
-#define TXX9_SIFLCR_TES 0x00000800
-#define TXX9_SIFLCR_RTSSC 0x00000200
-#define TXX9_SIFLCR_RSDE 0x00000100
-#define TXX9_SIFLCR_TSDE 0x00000080
-#define TXX9_SIFLCR_RTSTL_MASK 0x0000001e
-#define TXX9_SIFLCR_RTSTL_MAX 0x0000001e
-#define TXX9_SIFLCR_TBRK 0x00000001
-
-/* SIBGR : Baudrate Control */
-#define TXX9_SIBGR_BCLK_MASK 0x00000300
-#define TXX9_SIBGR_BCLK_T0 0x00000000
-#define TXX9_SIBGR_BCLK_T2 0x00000100
-#define TXX9_SIBGR_BCLK_T4 0x00000200
-#define TXX9_SIBGR_BCLK_T6 0x00000300
-#define TXX9_SIBGR_BRD_MASK 0x000000ff
-
-static inline unsigned int sio_in(struct uart_txx9_port *up, int offset)
-{
- switch (up->port.iotype) {
- default:
- return __raw_readl(up->port.membase + offset);
- case UPIO_PORT:
- return inl(up->port.iobase + offset);
- }
-}
-
-static inline void
-sio_out(struct uart_txx9_port *up, int offset, int value)
-{
- switch (up->port.iotype) {
- default:
- __raw_writel(value, up->port.membase + offset);
- break;
- case UPIO_PORT:
- outl(value, up->port.iobase + offset);
- break;
- }
-}
-
-static inline void
-sio_mask(struct uart_txx9_port *up, int offset, unsigned int value)
-{
- sio_out(up, offset, sio_in(up, offset) & ~value);
-}
-static inline void
-sio_set(struct uart_txx9_port *up, int offset, unsigned int value)
-{
- sio_out(up, offset, sio_in(up, offset) | value);
-}
-
-static inline void
-sio_quot_set(struct uart_txx9_port *up, int quot)
-{
- quot >>= 1;
- if (quot < 256)
- sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
- else if (quot < (256 << 2))
- sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
- else if (quot < (256 << 4))
- sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
- else if (quot < (256 << 6))
- sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
- else
- sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
-}
-
-static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port)
-{
- return container_of(port, struct uart_txx9_port, port);
-}
-
-static void serial_txx9_stop_tx(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
-}
-
-static void serial_txx9_start_tx(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
-}
-
-static void serial_txx9_stop_rx(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
-}
-
-static void serial_txx9_enable_ms(struct uart_port *port)
-{
- /* TXX9-SIO can not control DTR... */
-}
-
-static void serial_txx9_initialize(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- unsigned int tmout = 10000;
-
- sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
- /* TX4925 BUG WORKAROUND. Accessing SIOC register
- * immediately after soft reset causes bus error. */
- mmiowb();
- udelay(1);
- while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
- udelay(1);
- /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
- sio_set(up, TXX9_SIFCR,
- TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
- /* initial settings */
- sio_out(up, TXX9_SILCR,
- TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
- ((up->port.flags & UPF_TXX9_USE_SCLK) ?
- TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
- sio_quot_set(up, uart_get_divisor(port, 9600));
- sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
- sio_out(up, TXX9_SIDICR, 0);
-}
-
-static inline void
-receive_chars(struct uart_txx9_port *up, unsigned int *status)
-{
- struct tty_struct *tty = up->port.state->port.tty;
- unsigned char ch;
- unsigned int disr = *status;
- int max_count = 256;
- char flag;
- unsigned int next_ignore_status_mask;
-
- do {
- ch = sio_in(up, TXX9_SIRFIFO);
- flag = TTY_NORMAL;
- up->port.icount.rx++;
-
- /* mask out RFDN_MASK bit added by previous overrun */
- next_ignore_status_mask =
- up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
- if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
- TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
- /*
- * For statistics only
- */
- if (disr & TXX9_SIDISR_UBRK) {
- disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
- up->port.icount.brk++;
- /*
- * We do the SysRQ and SAK checking
- * here because otherwise the break
- * may get masked by ignore_status_mask
- * or read_status_mask.
- */
- if (uart_handle_break(&up->port))
- goto ignore_char;
- } else if (disr & TXX9_SIDISR_UPER)
- up->port.icount.parity++;
- else if (disr & TXX9_SIDISR_UFER)
- up->port.icount.frame++;
- if (disr & TXX9_SIDISR_UOER) {
- up->port.icount.overrun++;
- /*
- * The receiver read buffer still hold
- * a char which caused overrun.
- * Ignore next char by adding RFDN_MASK
- * to ignore_status_mask temporarily.
- */
- next_ignore_status_mask |=
- TXX9_SIDISR_RFDN_MASK;
- }
-
- /*
- * Mask off conditions which should be ingored.
- */
- disr &= up->port.read_status_mask;
-
- if (disr & TXX9_SIDISR_UBRK) {
- flag = TTY_BREAK;
- } else if (disr & TXX9_SIDISR_UPER)
- flag = TTY_PARITY;
- else if (disr & TXX9_SIDISR_UFER)
- flag = TTY_FRAME;
- }
- if (uart_handle_sysrq_char(&up->port, ch))
- goto ignore_char;
-
- uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
-
- ignore_char:
- up->port.ignore_status_mask = next_ignore_status_mask;
- disr = sio_in(up, TXX9_SIDISR);
- } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
- spin_unlock(&up->port.lock);
- tty_flip_buffer_push(tty);
- spin_lock(&up->port.lock);
- *status = disr;
-}
-
-static inline void transmit_chars(struct uart_txx9_port *up)
-{
- struct circ_buf *xmit = &up->port.state->xmit;
- int count;
-
- if (up->port.x_char) {
- sio_out(up, TXX9_SITFIFO, up->port.x_char);
- up->port.icount.tx++;
- up->port.x_char = 0;
- return;
- }
- if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
- serial_txx9_stop_tx(&up->port);
- return;
- }
-
- count = TXX9_SIO_TX_FIFO;
- do {
- sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- up->port.icount.tx++;
- if (uart_circ_empty(xmit))
- break;
- } while (--count > 0);
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(&up->port);
-
- if (uart_circ_empty(xmit))
- serial_txx9_stop_tx(&up->port);
-}
-
-static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
-{
- int pass_counter = 0;
- struct uart_txx9_port *up = dev_id;
- unsigned int status;
-
- while (1) {
- spin_lock(&up->port.lock);
- status = sio_in(up, TXX9_SIDISR);
- if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
- status &= ~TXX9_SIDISR_TDIS;
- if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
- TXX9_SIDISR_TOUT))) {
- spin_unlock(&up->port.lock);
- break;
- }
-
- if (status & TXX9_SIDISR_RDIS)
- receive_chars(up, &status);
- if (status & TXX9_SIDISR_TDIS)
- transmit_chars(up);
- /* Clear TX/RX Int. Status */
- sio_mask(up, TXX9_SIDISR,
- TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
- TXX9_SIDISR_TOUT);
- spin_unlock(&up->port.lock);
-
- if (pass_counter++ > PASS_LIMIT)
- break;
- }
-
- return pass_counter ? IRQ_HANDLED : IRQ_NONE;
-}
-
-static unsigned int serial_txx9_tx_empty(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- unsigned long flags;
- unsigned int ret;
-
- spin_lock_irqsave(&up->port.lock, flags);
- ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- return ret;
-}
-
-static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- unsigned int ret;
-
- /* no modem control lines */
- ret = TIOCM_CAR | TIOCM_DSR;
- ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
- ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
-
- return ret;
-}
-
-static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
-
- if (mctrl & TIOCM_RTS)
- sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
- else
- sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
-}
-
-static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
- if (break_state == -1)
- sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
- else
- sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-#if defined(CONFIG_SERIAL_TXX9_CONSOLE) || (CONFIG_CONSOLE_POLL)
-/*
- * Wait for transmitter & holding register to empty
- */
-static void wait_for_xmitr(struct uart_txx9_port *up)
-{
- unsigned int tmout = 10000;
-
- /* Wait up to 10ms for the character(s) to be sent. */
- while (--tmout &&
- !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
- udelay(1);
-
- /* Wait up to 1s for flow control if necessary */
- if (up->port.flags & UPF_CONS_FLOW) {
- tmout = 1000000;
- while (--tmout &&
- (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
- udelay(1);
- }
-}
-#endif
-
-#ifdef CONFIG_CONSOLE_POLL
-/*
- * Console polling routines for writing and reading from the uart while
- * in an interrupt or debug context.
- */
-
-static int serial_txx9_get_poll_char(struct uart_port *port)
-{
- unsigned int ier;
- unsigned char c;
- struct uart_txx9_port *up = to_uart_txx9_port(port);
-
- /*
- * First save the IER then disable the interrupts
- */
- ier = sio_in(up, TXX9_SIDICR);
- sio_out(up, TXX9_SIDICR, 0);
-
- while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
- ;
-
- c = sio_in(up, TXX9_SIRFIFO);
-
- /*
- * Finally, clear RX interrupt status
- * and restore the IER
- */
- sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
- sio_out(up, TXX9_SIDICR, ier);
- return c;
-}
-
-
-static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c)
-{
- unsigned int ier;
- struct uart_txx9_port *up = to_uart_txx9_port(port);
-
- /*
- * First save the IER then disable the interrupts
- */
- ier = sio_in(up, TXX9_SIDICR);
- sio_out(up, TXX9_SIDICR, 0);
-
- wait_for_xmitr(up);
- /*
- * Send the character out.
- * If a LF, also do CR...
- */
- sio_out(up, TXX9_SITFIFO, c);
- if (c == 10) {
- wait_for_xmitr(up);
- sio_out(up, TXX9_SITFIFO, 13);
- }
-
- /*
- * Finally, wait for transmitter to become empty
- * and restore the IER
- */
- wait_for_xmitr(up);
- sio_out(up, TXX9_SIDICR, ier);
-}
-
-#endif /* CONFIG_CONSOLE_POLL */
-
-static int serial_txx9_startup(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- unsigned long flags;
- int retval;
-
- /*
- * Clear the FIFO buffers and disable them.
- * (they will be reenabled in set_termios())
- */
- sio_set(up, TXX9_SIFCR,
- TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
- /* clear reset */
- sio_mask(up, TXX9_SIFCR,
- TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
- sio_out(up, TXX9_SIDICR, 0);
-
- /*
- * Clear the interrupt registers.
- */
- sio_out(up, TXX9_SIDISR, 0);
-
- retval = request_irq(up->port.irq, serial_txx9_interrupt,
- IRQF_SHARED, "serial_txx9", up);
- if (retval)
- return retval;
-
- /*
- * Now, initialize the UART
- */
- spin_lock_irqsave(&up->port.lock, flags);
- serial_txx9_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /* Enable RX/TX */
- sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
-
- /*
- * Finally, enable interrupts.
- */
- sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
-
- return 0;
-}
-
-static void serial_txx9_shutdown(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- unsigned long flags;
-
- /*
- * Disable interrupts from this port
- */
- sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */
-
- spin_lock_irqsave(&up->port.lock, flags);
- serial_txx9_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /*
- * Disable break condition
- */
- sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
-
-#ifdef CONFIG_SERIAL_TXX9_CONSOLE
- if (up->port.cons && up->port.line == up->port.cons->index) {
- free_irq(up->port.irq, up);
- return;
- }
-#endif
- /* reset FIFOs */
- sio_set(up, TXX9_SIFCR,
- TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
- /* clear reset */
- sio_mask(up, TXX9_SIFCR,
- TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
-
- /* Disable RX/TX */
- sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
-
- free_irq(up->port.irq, up);
-}
-
-static void
-serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
- struct ktermios *old)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- unsigned int cval, fcr = 0;
- unsigned long flags;
- unsigned int baud, quot;
-
- /*
- * We don't support modem control lines.
- */
- termios->c_cflag &= ~(HUPCL | CMSPAR);
- termios->c_cflag |= CLOCAL;
-
- cval = sio_in(up, TXX9_SILCR);
- /* byte size and parity */
- cval &= ~TXX9_SILCR_UMODE_MASK;
- switch (termios->c_cflag & CSIZE) {
- case CS7:
- cval |= TXX9_SILCR_UMODE_7BIT;
- break;
- default:
- case CS5: /* not supported */
- case CS6: /* not supported */
- case CS8:
- cval |= TXX9_SILCR_UMODE_8BIT;
- break;
- }
-
- cval &= ~TXX9_SILCR_USBL_MASK;
- if (termios->c_cflag & CSTOPB)
- cval |= TXX9_SILCR_USBL_2BIT;
- else
- cval |= TXX9_SILCR_USBL_1BIT;
- cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
- if (termios->c_cflag & PARENB)
- cval |= TXX9_SILCR_UPEN;
- if (!(termios->c_cflag & PARODD))
- cval |= TXX9_SILCR_UEPS;
-
- /*
- * Ask the core to calculate the divisor for us.
- */
- baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2);
- quot = uart_get_divisor(port, baud);
-
- /* Set up FIFOs */
- /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
- fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
-
- /*
- * Ok, we're now changing the port state. Do it with
- * interrupts disabled.
- */
- spin_lock_irqsave(&up->port.lock, flags);
-
- /*
- * Update the per-port timeout.
- */
- uart_update_timeout(port, termios->c_cflag, baud);
-
- up->port.read_status_mask = TXX9_SIDISR_UOER |
- TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
- if (termios->c_iflag & INPCK)
- up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
- if (termios->c_iflag & (BRKINT | PARMRK))
- up->port.read_status_mask |= TXX9_SIDISR_UBRK;
-
- /*
- * Characteres to ignore
- */
- up->port.ignore_status_mask = 0;
- if (termios->c_iflag & IGNPAR)
- up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
- if (termios->c_iflag & IGNBRK) {
- up->port.ignore_status_mask |= TXX9_SIDISR_UBRK;
- /*
- * If we're ignoring parity and break indicators,
- * ignore overruns too (for real raw support).
- */
- if (termios->c_iflag & IGNPAR)
- up->port.ignore_status_mask |= TXX9_SIDISR_UOER;
- }
-
- /*
- * ignore all characters if CREAD is not set
- */
- if ((termios->c_cflag & CREAD) == 0)
- up->port.ignore_status_mask |= TXX9_SIDISR_RDIS;
-
- /* CTS flow control flag */
- if ((termios->c_cflag & CRTSCTS) &&
- (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) {
- sio_set(up, TXX9_SIFLCR,
- TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
- } else {
- sio_mask(up, TXX9_SIFLCR,
- TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
- }
-
- sio_out(up, TXX9_SILCR, cval);
- sio_quot_set(up, quot);
- sio_out(up, TXX9_SIFCR, fcr);
-
- serial_txx9_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static void
-serial_txx9_pm(struct uart_port *port, unsigned int state,
- unsigned int oldstate)
-{
- /*
- * If oldstate was -1 this is called from
- * uart_configure_port(). In this case do not initialize the
- * port now, because the port was already initialized (for
- * non-console port) or should not be initialized here (for
- * console port). If we initialized the port here we lose
- * serial console settings.
- */
- if (state == 0 && oldstate != -1)
- serial_txx9_initialize(port);
-}
-
-static int serial_txx9_request_resource(struct uart_txx9_port *up)
-{
- unsigned int size = TXX9_REGION_SIZE;
- int ret = 0;
-
- switch (up->port.iotype) {
- default:
- if (!up->port.mapbase)
- break;
-
- if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) {
- ret = -EBUSY;
- break;
- }
-
- if (up->port.flags & UPF_IOREMAP) {
- up->port.membase = ioremap(up->port.mapbase, size);
- if (!up->port.membase) {
- release_mem_region(up->port.mapbase, size);
- ret = -ENOMEM;
- }
- }
- break;
-
- case UPIO_PORT:
- if (!request_region(up->port.iobase, size, "serial_txx9"))
- ret = -EBUSY;
- break;
- }
- return ret;
-}
-
-static void serial_txx9_release_resource(struct uart_txx9_port *up)
-{
- unsigned int size = TXX9_REGION_SIZE;
-
- switch (up->port.iotype) {
- default:
- if (!up->port.mapbase)
- break;
-
- if (up->port.flags & UPF_IOREMAP) {
- iounmap(up->port.membase);
- up->port.membase = NULL;
- }
-
- release_mem_region(up->port.mapbase, size);
- break;
-
- case UPIO_PORT:
- release_region(up->port.iobase, size);
- break;
- }
-}
-
-static void serial_txx9_release_port(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- serial_txx9_release_resource(up);
-}
-
-static int serial_txx9_request_port(struct uart_port *port)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- return serial_txx9_request_resource(up);
-}
-
-static void serial_txx9_config_port(struct uart_port *port, int uflags)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
- int ret;
-
- /*
- * Find the region that we can probe for. This in turn
- * tells us whether we can probe for the type of port.
- */
- ret = serial_txx9_request_resource(up);
- if (ret < 0)
- return;
- port->type = PORT_TXX9;
- up->port.fifosize = TXX9_SIO_TX_FIFO;
-
-#ifdef CONFIG_SERIAL_TXX9_CONSOLE
- if (up->port.line == up->port.cons->index)
- return;
-#endif
- serial_txx9_initialize(port);
-}
-
-static const char *
-serial_txx9_type(struct uart_port *port)
-{
- return "txx9";
-}
-
-static struct uart_ops serial_txx9_pops = {
- .tx_empty = serial_txx9_tx_empty,
- .set_mctrl = serial_txx9_set_mctrl,
- .get_mctrl = serial_txx9_get_mctrl,
- .stop_tx = serial_txx9_stop_tx,
- .start_tx = serial_txx9_start_tx,
- .stop_rx = serial_txx9_stop_rx,
- .enable_ms = serial_txx9_enable_ms,
- .break_ctl = serial_txx9_break_ctl,
- .startup = serial_txx9_startup,
- .shutdown = serial_txx9_shutdown,
- .set_termios = serial_txx9_set_termios,
- .pm = serial_txx9_pm,
- .type = serial_txx9_type,
- .release_port = serial_txx9_release_port,
- .request_port = serial_txx9_request_port,
- .config_port = serial_txx9_config_port,
-#ifdef CONFIG_CONSOLE_POLL
- .poll_get_char = serial_txx9_get_poll_char,
- .poll_put_char = serial_txx9_put_poll_char,
-#endif
-};
-
-static struct uart_txx9_port serial_txx9_ports[UART_NR];
-
-static void __init serial_txx9_register_ports(struct uart_driver *drv,
- struct device *dev)
-{
- int i;
-
- for (i = 0; i < UART_NR; i++) {
- struct uart_txx9_port *up = &serial_txx9_ports[i];
-
- up->port.line = i;
- up->port.ops = &serial_txx9_pops;
- up->port.dev = dev;
- if (up->port.iobase || up->port.mapbase)
- uart_add_one_port(drv, &up->port);
- }
-}
-
-#ifdef CONFIG_SERIAL_TXX9_CONSOLE
-
-static void serial_txx9_console_putchar(struct uart_port *port, int ch)
-{
- struct uart_txx9_port *up = to_uart_txx9_port(port);
-
- wait_for_xmitr(up);
- sio_out(up, TXX9_SITFIFO, ch);
-}
-
-/*
- * Print a string to the serial port trying not to disturb
- * any possible real use of the port...
- *
- * The console_lock must be held when we get here.
- */
-static void
-serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
-{
- struct uart_txx9_port *up = &serial_txx9_ports[co->index];
- unsigned int ier, flcr;
-
- /*
- * First save the UER then disable the interrupts
- */
- ier = sio_in(up, TXX9_SIDICR);
- sio_out(up, TXX9_SIDICR, 0);
- /*
- * Disable flow-control if enabled (and unnecessary)
- */
- flcr = sio_in(up, TXX9_SIFLCR);
- if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
- sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
-
- uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
-
- /*
- * Finally, wait for transmitter to become empty
- * and restore the IER
- */
- wait_for_xmitr(up);
- sio_out(up, TXX9_SIFLCR, flcr);
- sio_out(up, TXX9_SIDICR, ier);
-}
-
-static int __init serial_txx9_console_setup(struct console *co, char *options)
-{
- struct uart_port *port;
- struct uart_txx9_port *up;
- int baud = 9600;
- int bits = 8;
- int parity = 'n';
- int flow = 'n';
-
- /*
- * Check whether an invalid uart number has been specified, and
- * if so, search for the first available port that does have
- * console support.
- */
- if (co->index >= UART_NR)
- co->index = 0;
- up = &serial_txx9_ports[co->index];
- port = &up->port;
- if (!port->ops)
- return -ENODEV;
-
- serial_txx9_initialize(&up->port);
-
- if (options)
- uart_parse_options(options, &baud, &parity, &bits, &flow);
-
- return uart_set_options(port, co, baud, parity, bits, flow);
-}
-
-static struct uart_driver serial_txx9_reg;
-static struct console serial_txx9_console = {
- .name = TXX9_TTY_NAME,
- .write = serial_txx9_console_write,
- .device = uart_console_device,
- .setup = serial_txx9_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &serial_txx9_reg,
-};
-
-static int __init serial_txx9_console_init(void)
-{
- register_console(&serial_txx9_console);
- return 0;
-}
-console_initcall(serial_txx9_console_init);
-
-#define SERIAL_TXX9_CONSOLE &serial_txx9_console
-#else
-#define SERIAL_TXX9_CONSOLE NULL
-#endif
-
-static struct uart_driver serial_txx9_reg = {
- .owner = THIS_MODULE,
- .driver_name = "serial_txx9",
- .dev_name = TXX9_TTY_NAME,
- .major = TXX9_TTY_MAJOR,
- .minor = TXX9_TTY_MINOR_START,
- .nr = UART_NR,
- .cons = SERIAL_TXX9_CONSOLE,
-};
-
-int __init early_serial_txx9_setup(struct uart_port *port)
-{
- if (port->line >= ARRAY_SIZE(serial_txx9_ports))
- return -ENODEV;
-
- serial_txx9_ports[port->line].port = *port;
- serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
- serial_txx9_ports[port->line].port.flags |=
- UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
- return 0;
-}
-
-static DEFINE_MUTEX(serial_txx9_mutex);
-
-/**
- * serial_txx9_register_port - register a serial port
- * @port: serial port template
- *
- * Configure the serial port specified by the request.
- *
- * The port is then probed and if necessary the IRQ is autodetected
- * If this fails an error is returned.
- *
- * On success the port is ready to use and the line number is returned.
- */
-static int __devinit serial_txx9_register_port(struct uart_port *port)
-{
- int i;
- struct uart_txx9_port *uart;
- int ret = -ENOSPC;
-
- mutex_lock(&serial_txx9_mutex);
- for (i = 0; i < UART_NR; i++) {
- uart = &serial_txx9_ports[i];
- if (uart_match_port(&uart->port, port)) {
- uart_remove_one_port(&serial_txx9_reg, &uart->port);
- break;
- }
- }
- if (i == UART_NR) {
- /* Find unused port */
- for (i = 0; i < UART_NR; i++) {
- uart = &serial_txx9_ports[i];
- if (!(uart->port.iobase || uart->port.mapbase))
- break;
- }
- }
- if (i < UART_NR) {
- uart->port.iobase = port->iobase;
- uart->port.membase = port->membase;
- uart->port.irq = port->irq;
- uart->port.uartclk = port->uartclk;
- uart->port.iotype = port->iotype;
- uart->port.flags = port->flags
- | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
- uart->port.mapbase = port->mapbase;
- if (port->dev)
- uart->port.dev = port->dev;
- ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
- if (ret == 0)
- ret = uart->port.line;
- }
- mutex_unlock(&serial_txx9_mutex);
- return ret;
-}
-
-/**
- * serial_txx9_unregister_port - remove a txx9 serial port at runtime
- * @line: serial line number
- *
- * Remove one serial port. This may not be called from interrupt
- * context. We hand the port back to the our control.
- */
-static void __devexit serial_txx9_unregister_port(int line)
-{
- struct uart_txx9_port *uart = &serial_txx9_ports[line];
-
- mutex_lock(&serial_txx9_mutex);
- uart_remove_one_port(&serial_txx9_reg, &uart->port);
- uart->port.flags = 0;
- uart->port.type = PORT_UNKNOWN;
- uart->port.iobase = 0;
- uart->port.mapbase = 0;
- uart->port.membase = NULL;
- uart->port.dev = NULL;
- mutex_unlock(&serial_txx9_mutex);
-}
-
-/*
- * Register a set of serial devices attached to a platform device.
- */
-static int __devinit serial_txx9_probe(struct platform_device *dev)
-{
- struct uart_port *p = dev->dev.platform_data;
- struct uart_port port;
- int ret, i;
-
- memset(&port, 0, sizeof(struct uart_port));
- for (i = 0; p && p->uartclk != 0; p++, i++) {
- port.iobase = p->iobase;
- port.membase = p->membase;
- port.irq = p->irq;
- port.uartclk = p->uartclk;
- port.iotype = p->iotype;
- port.flags = p->flags;
- port.mapbase = p->mapbase;
- port.dev = &dev->dev;
- ret = serial_txx9_register_port(&port);
- if (ret < 0) {
- dev_err(&dev->dev, "unable to register port at index %d "
- "(IO%lx MEM%llx IRQ%d): %d\n", i,
- p->iobase, (unsigned long long)p->mapbase,
- p->irq, ret);
- }
- }
- return 0;
-}
-
-/*
- * Remove serial ports registered against a platform device.
- */
-static int __devexit serial_txx9_remove(struct platform_device *dev)
-{
- int i;
-
- for (i = 0; i < UART_NR; i++) {
- struct uart_txx9_port *up = &serial_txx9_ports[i];
-
- if (up->port.dev == &dev->dev)
- serial_txx9_unregister_port(i);
- }
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
-{
- int i;
-
- for (i = 0; i < UART_NR; i++) {
- struct uart_txx9_port *up = &serial_txx9_ports[i];
-
- if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
- uart_suspend_port(&serial_txx9_reg, &up->port);
- }
-
- return 0;
-}
-
-static int serial_txx9_resume(struct platform_device *dev)
-{
- int i;
-
- for (i = 0; i < UART_NR; i++) {
- struct uart_txx9_port *up = &serial_txx9_ports[i];
-
- if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
- uart_resume_port(&serial_txx9_reg, &up->port);
- }
-
- return 0;
-}
-#endif
-
-static struct platform_driver serial_txx9_plat_driver = {
- .probe = serial_txx9_probe,
- .remove = __devexit_p(serial_txx9_remove),
-#ifdef CONFIG_PM
- .suspend = serial_txx9_suspend,
- .resume = serial_txx9_resume,
-#endif
- .driver = {
- .name = "serial_txx9",
- .owner = THIS_MODULE,
- },
-};
-
-#ifdef ENABLE_SERIAL_TXX9_PCI
-/*
- * Probe one serial board. Unfortunately, there is no rhyme nor reason
- * to the arrangement of serial ports on a PCI card.
- */
-static int __devinit
-pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
-{
- struct uart_port port;
- int line;
- int rc;
-
- rc = pci_enable_device(dev);
- if (rc)
- return rc;
-
- memset(&port, 0, sizeof(port));
- port.ops = &serial_txx9_pops;
- port.flags |= UPF_TXX9_HAVE_CTS_LINE;
- port.uartclk = 66670000;
- port.irq = dev->irq;
- port.iotype = UPIO_PORT;
- port.iobase = pci_resource_start(dev, 1);
- port.dev = &dev->dev;
- line = serial_txx9_register_port(&port);
- if (line < 0) {
- printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
- pci_disable_device(dev);
- return line;
- }
- pci_set_drvdata(dev, &serial_txx9_ports[line]);
-
- return 0;
-}
-
-static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
-{
- struct uart_txx9_port *up = pci_get_drvdata(dev);
-
- pci_set_drvdata(dev, NULL);
-
- if (up) {
- serial_txx9_unregister_port(up->port.line);
- pci_disable_device(dev);
- }
-}
-
-#ifdef CONFIG_PM
-static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
-{
- struct uart_txx9_port *up = pci_get_drvdata(dev);
-
- if (up)
- uart_suspend_port(&serial_txx9_reg, &up->port);
- pci_save_state(dev);
- pci_set_power_state(dev, pci_choose_state(dev, state));
- return 0;
-}
-
-static int pciserial_txx9_resume_one(struct pci_dev *dev)
-{
- struct uart_txx9_port *up = pci_get_drvdata(dev);
-
- pci_set_power_state(dev, PCI_D0);
- pci_restore_state(dev);
- if (up)
- uart_resume_port(&serial_txx9_reg, &up->port);
- return 0;
-}
-#endif
-
-static const struct pci_device_id serial_txx9_pci_tbl[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
- { 0, }
-};
-
-static struct pci_driver serial_txx9_pci_driver = {
- .name = "serial_txx9",
- .probe = pciserial_txx9_init_one,
- .remove = __devexit_p(pciserial_txx9_remove_one),
-#ifdef CONFIG_PM
- .suspend = pciserial_txx9_suspend_one,
- .resume = pciserial_txx9_resume_one,
-#endif
- .id_table = serial_txx9_pci_tbl,
-};
-
-MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
-#endif /* ENABLE_SERIAL_TXX9_PCI */
-
-static struct platform_device *serial_txx9_plat_devs;
-
-static int __init serial_txx9_init(void)
-{
- int ret;
-
- printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
-
- ret = uart_register_driver(&serial_txx9_reg);
- if (ret)
- goto out;
-
- serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
- if (!serial_txx9_plat_devs) {
- ret = -ENOMEM;
- goto unreg_uart_drv;
- }
-
- ret = platform_device_add(serial_txx9_plat_devs);
- if (ret)
- goto put_dev;
-
- serial_txx9_register_ports(&serial_txx9_reg,
- &serial_txx9_plat_devs->dev);
-
- ret = platform_driver_register(&serial_txx9_plat_driver);
- if (ret)
- goto del_dev;
-
-#ifdef ENABLE_SERIAL_TXX9_PCI
- ret = pci_register_driver(&serial_txx9_pci_driver);
-#endif
- if (ret == 0)
- goto out;
-
- del_dev:
- platform_device_del(serial_txx9_plat_devs);
- put_dev:
- platform_device_put(serial_txx9_plat_devs);
- unreg_uart_drv:
- uart_unregister_driver(&serial_txx9_reg);
- out:
- return ret;
-}
-
-static void __exit serial_txx9_exit(void)
-{
- int i;
-
-#ifdef ENABLE_SERIAL_TXX9_PCI
- pci_unregister_driver(&serial_txx9_pci_driver);
-#endif
- platform_driver_unregister(&serial_txx9_plat_driver);
- platform_device_unregister(serial_txx9_plat_devs);
- for (i = 0; i < UART_NR; i++) {
- struct uart_txx9_port *up = &serial_txx9_ports[i];
- if (up->port.iobase || up->port.mapbase)
- uart_remove_one_port(&serial_txx9_reg, &up->port);
- }
-
- uart_unregister_driver(&serial_txx9_reg);
-}
-
-module_init(serial_txx9_init);
-module_exit(serial_txx9_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("TX39/49 serial driver");
-
-MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);
git.samba.org / sfrench / cifs-2.6.git / blobdiff