+++ /dev/null
-/*
- * bfin_serial.h - Blackfin UART/Serial definitions
- *
- * Copyright 2006-2010 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#ifndef __BFIN_ASM_SERIAL_H__
-#define __BFIN_ASM_SERIAL_H__
-
-#include <linux/circ_buf.h>
-#include <linux/serial_core.h>
-#include <linux/spinlock.h>
-#include <linux/timer.h>
-#include <linux/workqueue.h>
-#include <mach/anomaly.h>
-#include <mach/bfin_serial.h>
-
-#if defined(CONFIG_BFIN_UART0_CTSRTS) || \
- defined(CONFIG_BFIN_UART1_CTSRTS) || \
- defined(CONFIG_BFIN_UART2_CTSRTS) || \
- defined(CONFIG_BFIN_UART3_CTSRTS)
-# if defined(BFIN_UART_BF54X_STYLE) || defined(BFIN_UART_BF60X_STYLE)
-# define SERIAL_BFIN_HARD_CTSRTS
-# else
-# define SERIAL_BFIN_CTSRTS
-# endif
-#endif
-
-struct bfin_serial_port {
- struct uart_port port;
- unsigned int old_status;
- int tx_irq;
- int rx_irq;
- int status_irq;
-#ifndef BFIN_UART_BF54X_STYLE
- unsigned int lsr;
-#endif
-#ifdef CONFIG_SERIAL_BFIN_DMA
- int tx_done;
- int tx_count;
- struct circ_buf rx_dma_buf;
- struct timer_list rx_dma_timer;
- int rx_dma_nrows;
- spinlock_t rx_lock;
- unsigned int tx_dma_channel;
- unsigned int rx_dma_channel;
- struct work_struct tx_dma_workqueue;
-#elif ANOMALY_05000363
- unsigned int anomaly_threshold;
-#endif
-#if defined(SERIAL_BFIN_CTSRTS) || \
- defined(SERIAL_BFIN_HARD_CTSRTS)
- int cts_pin;
- int rts_pin;
-#endif
-};
-
-#ifdef BFIN_UART_BF60X_STYLE
-
-/* UART_CTL Masks */
-#define UCEN 0x1 /* Enable UARTx Clocks */
-#define LOOP_ENA 0x2 /* Loopback Mode Enable */
-#define UMOD_MDB 0x10 /* Enable MDB Mode */
-#define UMOD_IRDA 0x20 /* Enable IrDA Mode */
-#define UMOD_MASK 0x30 /* Uart Mode Mask */
-#define WLS(x) (((x-5) & 0x03) << 8) /* Word Length Select */
-#define WLS_MASK 0x300 /* Word length Select Mask */
-#define WLS_OFFSET 8 /* Word length Select Offset */
-#define STB 0x1000 /* Stop Bits */
-#define STBH 0x2000 /* Half Stop Bits */
-#define PEN 0x4000 /* Parity Enable */
-#define EPS 0x8000 /* Even Parity Select */
-#define STP 0x10000 /* Stick Parity */
-#define FPE 0x20000 /* Force Parity Error On Transmit */
-#define FFE 0x40000 /* Force Framing Error On Transmit */
-#define SB 0x80000 /* Set Break */
-#define LCR_MASK (SB | STP | EPS | PEN | STB | WLS_MASK)
-#define FCPOL 0x400000 /* Flow Control Pin Polarity */
-#define RPOLC 0x800000 /* IrDA RX Polarity Change */
-#define TPOLC 0x1000000 /* IrDA TX Polarity Change */
-#define MRTS 0x2000000 /* Manual Request To Send */
-#define XOFF 0x4000000 /* Transmitter Off */
-#define ARTS 0x8000000 /* Automatic Request To Send */
-#define ACTS 0x10000000 /* Automatic Clear To Send */
-#define RFIT 0x20000000 /* Receive FIFO IRQ Threshold */
-#define RFRT 0x40000000 /* Receive FIFO RTS Threshold */
-
-/* UART_STAT Masks */
-#define DR 0x01 /* Data Ready */
-#define OE 0x02 /* Overrun Error */
-#define PE 0x04 /* Parity Error */
-#define FE 0x08 /* Framing Error */
-#define BI 0x10 /* Break Interrupt */
-#define THRE 0x20 /* THR Empty */
-#define TEMT 0x80 /* TSR and UART_THR Empty */
-#define TFI 0x100 /* Transmission Finished Indicator */
-
-#define ASTKY 0x200 /* Address Sticky */
-#define ADDR 0x400 /* Address bit status */
-#define RO 0x800 /* Reception Ongoing */
-#define SCTS 0x1000 /* Sticky CTS */
-#define CTS 0x10000 /* Clear To Send */
-#define RFCS 0x20000 /* Receive FIFO Count Status */
-
-/* UART_CLOCK Masks */
-#define EDBO 0x80000000 /* Enable Devide by One */
-
-#else /* BFIN_UART_BF60X_STYLE */
-
-/* UART_LCR Masks */
-#define WLS(x) (((x)-5) & 0x03) /* Word Length Select */
-#define WLS_MASK 0x03 /* Word length Select Mask */
-#define WLS_OFFSET 0 /* Word length Select Offset */
-#define STB 0x04 /* Stop Bits */
-#define PEN 0x08 /* Parity Enable */
-#define EPS 0x10 /* Even Parity Select */
-#define STP 0x20 /* Stick Parity */
-#define SB 0x40 /* Set Break */
-#define DLAB 0x80 /* Divisor Latch Access */
-#define LCR_MASK (SB | STP | EPS | PEN | STB | WLS_MASK)
-
-/* UART_LSR Masks */
-#define DR 0x01 /* Data Ready */
-#define OE 0x02 /* Overrun Error */
-#define PE 0x04 /* Parity Error */
-#define FE 0x08 /* Framing Error */
-#define BI 0x10 /* Break Interrupt */
-#define THRE 0x20 /* THR Empty */
-#define TEMT 0x40 /* TSR and UART_THR Empty */
-#define TFI 0x80 /* Transmission Finished Indicator */
-
-/* UART_MCR Masks */
-#define XOFF 0x01 /* Transmitter Off */
-#define MRTS 0x02 /* Manual Request To Send */
-#define RFIT 0x04 /* Receive FIFO IRQ Threshold */
-#define RFRT 0x08 /* Receive FIFO RTS Threshold */
-#define LOOP_ENA 0x10 /* Loopback Mode Enable */
-#define FCPOL 0x20 /* Flow Control Pin Polarity */
-#define ARTS 0x40 /* Automatic Request To Send */
-#define ACTS 0x80 /* Automatic Clear To Send */
-
-/* UART_MSR Masks */
-#define SCTS 0x01 /* Sticky CTS */
-#define CTS 0x10 /* Clear To Send */
-#define RFCS 0x20 /* Receive FIFO Count Status */
-
-/* UART_GCTL Masks */
-#define UCEN 0x01 /* Enable UARTx Clocks */
-#define UMOD_IRDA 0x02 /* Enable IrDA Mode */
-#define UMOD_MASK 0x02 /* Uart Mode Mask */
-#define TPOLC 0x04 /* IrDA TX Polarity Change */
-#define RPOLC 0x08 /* IrDA RX Polarity Change */
-#define FPE 0x10 /* Force Parity Error On Transmit */
-#define FFE 0x20 /* Force Framing Error On Transmit */
-
-#endif /* BFIN_UART_BF60X_STYLE */
-
-/* UART_IER Masks */
-#define ERBFI 0x01 /* Enable Receive Buffer Full Interrupt */
-#define ETBEI 0x02 /* Enable Transmit Buffer Empty Interrupt */
-#define ELSI 0x04 /* Enable RX Status Interrupt */
-#define EDSSI 0x08 /* Enable Modem Status Interrupt */
-#define EDTPTI 0x10 /* Enable DMA Transmit PIRQ Interrupt */
-#define ETFI 0x20 /* Enable Transmission Finished Interrupt */
-#define ERFCI 0x40 /* Enable Receive FIFO Count Interrupt */
-
-#if defined(BFIN_UART_BF60X_STYLE)
-# define OFFSET_REDIV 0x00 /* Version ID Register */
-# define OFFSET_CTL 0x04 /* Control Register */
-# define OFFSET_STAT 0x08 /* Status Register */
-# define OFFSET_SCR 0x0C /* SCR Scratch Register */
-# define OFFSET_CLK 0x10 /* Clock Rate Register */
-# define OFFSET_IER 0x14 /* Interrupt Enable Register */
-# define OFFSET_IER_SET 0x18 /* Set Interrupt Enable Register */
-# define OFFSET_IER_CLEAR 0x1C /* Clear Interrupt Enable Register */
-# define OFFSET_RBR 0x20 /* Receive Buffer register */
-# define OFFSET_THR 0x24 /* Transmit Holding register */
-#elif defined(BFIN_UART_BF54X_STYLE)
-# define OFFSET_DLL 0x00 /* Divisor Latch (Low-Byte) */
-# define OFFSET_DLH 0x04 /* Divisor Latch (High-Byte) */
-# define OFFSET_GCTL 0x08 /* Global Control Register */
-# define OFFSET_LCR 0x0C /* Line Control Register */
-# define OFFSET_MCR 0x10 /* Modem Control Register */
-# define OFFSET_LSR 0x14 /* Line Status Register */
-# define OFFSET_MSR 0x18 /* Modem Status Register */
-# define OFFSET_SCR 0x1C /* SCR Scratch Register */
-# define OFFSET_IER_SET 0x20 /* Set Interrupt Enable Register */
-# define OFFSET_IER_CLEAR 0x24 /* Clear Interrupt Enable Register */
-# define OFFSET_THR 0x28 /* Transmit Holding register */
-# define OFFSET_RBR 0x2C /* Receive Buffer register */
-#else /* BF533 style */
-# define OFFSET_THR 0x00 /* Transmit Holding register */
-# define OFFSET_RBR 0x00 /* Receive Buffer register */
-# define OFFSET_DLL 0x00 /* Divisor Latch (Low-Byte) */
-# define OFFSET_DLH 0x04 /* Divisor Latch (High-Byte) */
-# define OFFSET_IER 0x04 /* Interrupt Enable Register */
-# define OFFSET_IIR 0x08 /* Interrupt Identification Register */
-# define OFFSET_LCR 0x0C /* Line Control Register */
-# define OFFSET_MCR 0x10 /* Modem Control Register */
-# define OFFSET_LSR 0x14 /* Line Status Register */
-# define OFFSET_MSR 0x18 /* Modem Status Register */
-# define OFFSET_SCR 0x1C /* SCR Scratch Register */
-# define OFFSET_GCTL 0x24 /* Global Control Register */
-/* code should not need IIR, so force build error if they use it */
-# undef OFFSET_IIR
-#endif
-
-/*
- * All Blackfin system MMRs are padded to 32bits even if the register
- * itself is only 16bits. So use a helper macro to streamline this.
- */
-#define __BFP(m) u16 m; u16 __pad_##m
-struct bfin_uart_regs {
-#if defined(BFIN_UART_BF60X_STYLE)
- u32 revid;
- u32 ctl;
- u32 stat;
- u32 scr;
- u32 clk;
- u32 ier;
- u32 ier_set;
- u32 ier_clear;
- u32 rbr;
- u32 thr;
- u32 taip;
- u32 tsr;
- u32 rsr;
- u32 txdiv;
- u32 rxdiv;
-#elif defined(BFIN_UART_BF54X_STYLE)
- __BFP(dll);
- __BFP(dlh);
- __BFP(gctl);
- __BFP(lcr);
- __BFP(mcr);
- __BFP(lsr);
- __BFP(msr);
- __BFP(scr);
- __BFP(ier_set);
- __BFP(ier_clear);
- __BFP(thr);
- __BFP(rbr);
-#else
- union {
- u16 dll;
- u16 thr;
- const u16 rbr;
- };
- const u16 __pad0;
- union {
- u16 dlh;
- u16 ier;
- };
- const u16 __pad1;
- const __BFP(iir);
- __BFP(lcr);
- __BFP(mcr);
- __BFP(lsr);
- __BFP(msr);
- __BFP(scr);
- const u32 __pad2;
- __BFP(gctl);
-#endif
-};
-#undef __BFP
-
-#define port_membase(uart) (((struct bfin_serial_port *)(uart))->port.membase)
-
-/*
-#ifndef port_membase
-# define port_membase(p) 0
-#endif
-*/
-#ifdef BFIN_UART_BF60X_STYLE
-
-#define UART_GET_CHAR(p) bfin_read32(port_membase(p) + OFFSET_RBR)
-#define UART_GET_CLK(p) bfin_read32(port_membase(p) + OFFSET_CLK)
-#define UART_GET_CTL(p) bfin_read32(port_membase(p) + OFFSET_CTL)
-#define UART_GET_GCTL(p) UART_GET_CTL(p)
-#define UART_GET_LCR(p) UART_GET_CTL(p)
-#define UART_GET_MCR(p) UART_GET_CTL(p)
-#if ANOMALY_16000030
-#define UART_GET_STAT(p) \
-({ \
- u32 __ret; \
- unsigned long flags; \
- flags = hard_local_irq_save(); \
- __ret = bfin_read32(port_membase(p) + OFFSET_STAT); \
- hard_local_irq_restore(flags); \
- __ret; \
-})
-#else
-#define UART_GET_STAT(p) bfin_read32(port_membase(p) + OFFSET_STAT)
-#endif
-#define UART_GET_MSR(p) UART_GET_STAT(p)
-
-#define UART_PUT_CHAR(p, v) bfin_write32(port_membase(p) + OFFSET_THR, v)
-#define UART_PUT_CLK(p, v) bfin_write32(port_membase(p) + OFFSET_CLK, v)
-#define UART_PUT_CTL(p, v) bfin_write32(port_membase(p) + OFFSET_CTL, v)
-#define UART_PUT_GCTL(p, v) UART_PUT_CTL(p, v)
-#define UART_PUT_LCR(p, v) UART_PUT_CTL(p, v)
-#define UART_PUT_MCR(p, v) UART_PUT_CTL(p, v)
-#define UART_PUT_STAT(p, v) bfin_write32(port_membase(p) + OFFSET_STAT, v)
-
-#define UART_CLEAR_IER(p, v) bfin_write32(port_membase(p) + OFFSET_IER_CLEAR, v)
-#define UART_GET_IER(p) bfin_read32(port_membase(p) + OFFSET_IER)
-#define UART_SET_IER(p, v) bfin_write32(port_membase(p) + OFFSET_IER_SET, v)
-
-#define UART_CLEAR_DLAB(p) /* MMRs not muxed on BF60x */
-#define UART_SET_DLAB(p) /* MMRs not muxed on BF60x */
-
-#define UART_CLEAR_LSR(p) UART_PUT_STAT(p, -1)
-#define UART_GET_LSR(p) UART_GET_STAT(p)
-#define UART_PUT_LSR(p, v) UART_PUT_STAT(p, v)
-
-/* This handles hard CTS/RTS */
-#define BFIN_UART_CTSRTS_HARD
-#define UART_CLEAR_SCTS(p) UART_PUT_STAT(p, SCTS)
-#define UART_GET_CTS(x) (UART_GET_MSR(x) & CTS)
-#define UART_DISABLE_RTS(x) UART_PUT_MCR(x, UART_GET_MCR(x) & ~(ARTS | MRTS))
-#define UART_ENABLE_RTS(x) UART_PUT_MCR(x, UART_GET_MCR(x) | MRTS | ARTS)
-#define UART_ENABLE_INTS(x, v) UART_SET_IER(x, v)
-#define UART_DISABLE_INTS(x) UART_CLEAR_IER(x, 0xF)
-
-#else /* BFIN_UART_BF60X_STYLE */
-
-#define UART_GET_CHAR(p) bfin_read16(port_membase(p) + OFFSET_RBR)
-#define UART_GET_DLL(p) bfin_read16(port_membase(p) + OFFSET_DLL)
-#define UART_GET_DLH(p) bfin_read16(port_membase(p) + OFFSET_DLH)
-#define UART_GET_CLK(p) ((UART_GET_DLH(p) << 8) | UART_GET_DLL(p))
-#define UART_GET_GCTL(p) bfin_read16(port_membase(p) + OFFSET_GCTL)
-#define UART_GET_LCR(p) bfin_read16(port_membase(p) + OFFSET_LCR)
-#define UART_GET_MCR(p) bfin_read16(port_membase(p) + OFFSET_MCR)
-#define UART_GET_MSR(p) bfin_read16(port_membase(p) + OFFSET_MSR)
-
-#define UART_PUT_CHAR(p, v) bfin_write16(port_membase(p) + OFFSET_THR, v)
-#define UART_PUT_DLL(p, v) bfin_write16(port_membase(p) + OFFSET_DLL, v)
-#define UART_PUT_DLH(p, v) bfin_write16(port_membase(p) + OFFSET_DLH, v)
-#define UART_PUT_CLK(p, v) do \
-{\
-UART_PUT_DLL(p, v & 0xFF); \
-UART_PUT_DLH(p, (v >> 8) & 0xFF); } while (0);
-
-#define UART_PUT_GCTL(p, v) bfin_write16(port_membase(p) + OFFSET_GCTL, v)
-#define UART_PUT_LCR(p, v) bfin_write16(port_membase(p) + OFFSET_LCR, v)
-#define UART_PUT_MCR(p, v) bfin_write16(port_membase(p) + OFFSET_MCR, v)
-
-#ifdef BFIN_UART_BF54X_STYLE
-
-#define UART_CLEAR_IER(p, v) bfin_write16(port_membase(p) + OFFSET_IER_CLEAR, v)
-#define UART_GET_IER(p) bfin_read16(port_membase(p) + OFFSET_IER_SET)
-#define UART_SET_IER(p, v) bfin_write16(port_membase(p) + OFFSET_IER_SET, v)
-
-#define UART_CLEAR_DLAB(p) /* MMRs not muxed on BF54x */
-#define UART_SET_DLAB(p) /* MMRs not muxed on BF54x */
-
-#define UART_CLEAR_LSR(p) bfin_write16(port_membase(p) + OFFSET_LSR, -1)
-#define UART_GET_LSR(p) bfin_read16(port_membase(p) + OFFSET_LSR)
-#define UART_PUT_LSR(p, v) bfin_write16(port_membase(p) + OFFSET_LSR, v)
-
-/* This handles hard CTS/RTS */
-#define BFIN_UART_CTSRTS_HARD
-#define UART_CLEAR_SCTS(p) bfin_write16((port_membase(p) + OFFSET_MSR), SCTS)
-#define UART_GET_CTS(x) (UART_GET_MSR(x) & CTS)
-#define UART_DISABLE_RTS(x) UART_PUT_MCR(x, UART_GET_MCR(x) & ~(ARTS | MRTS))
-#define UART_ENABLE_RTS(x) UART_PUT_MCR(x, UART_GET_MCR(x) | MRTS | ARTS)
-#define UART_ENABLE_INTS(x, v) UART_SET_IER(x, v)
-#define UART_DISABLE_INTS(x) UART_CLEAR_IER(x, 0xF)
-
-#else /* BF533 style */
-
-#define UART_CLEAR_IER(p, v) UART_PUT_IER(p, UART_GET_IER(p) & ~(v))
-#define UART_GET_IER(p) bfin_read16(port_membase(p) + OFFSET_IER)
-#define UART_PUT_IER(p, v) bfin_write16(port_membase(p) + OFFSET_IER, v)
-#define UART_SET_IER(p, v) UART_PUT_IER(p, UART_GET_IER(p) | (v))
-
-#define UART_CLEAR_DLAB(p) do { UART_PUT_LCR(p, UART_GET_LCR(p) & ~DLAB); SSYNC(); } while (0)
-#define UART_SET_DLAB(p) do { UART_PUT_LCR(p, UART_GET_LCR(p) | DLAB); SSYNC(); } while (0)
-
-#define get_lsr_cache(uart) (((struct bfin_serial_port *)(uart))->lsr)
-#define put_lsr_cache(uart, v) (((struct bfin_serial_port *)(uart))->lsr = (v))
-
-/*
-#ifndef put_lsr_cache
-# define put_lsr_cache(p, v)
-#endif
-#ifndef get_lsr_cache
-# define get_lsr_cache(p) 0
-#endif
-*/
-
-/* The hardware clears the LSR bits upon read, so we need to cache
- * some of the more fun bits in software so they don't get lost
- * when checking the LSR in other code paths (TX).
- */
-static inline void UART_CLEAR_LSR(void *p)
-{
- put_lsr_cache(p, 0);
- bfin_write16(port_membase(p) + OFFSET_LSR, -1);
-}
-static inline unsigned int UART_GET_LSR(void *p)
-{
- unsigned int lsr = bfin_read16(port_membase(p) + OFFSET_LSR);
- put_lsr_cache(p, get_lsr_cache(p) | (lsr & (BI|FE|PE|OE)));
- return lsr | get_lsr_cache(p);
-}
-static inline void UART_PUT_LSR(void *p, uint16_t val)
-{
- put_lsr_cache(p, get_lsr_cache(p) & ~val);
-}
-
-/* This handles soft CTS/RTS */
-#define UART_GET_CTS(x) gpio_get_value((x)->cts_pin)
-#define UART_DISABLE_RTS(x) gpio_set_value((x)->rts_pin, 1)
-#define UART_ENABLE_RTS(x) gpio_set_value((x)->rts_pin, 0)
-#define UART_ENABLE_INTS(x, v) UART_PUT_IER(x, v)
-#define UART_DISABLE_INTS(x) UART_PUT_IER(x, 0)
-
-#endif /* BFIN_UART_BF54X_STYLE */
-
-#endif /* BFIN_UART_BF60X_STYLE */
-
-#ifndef BFIN_UART_TX_FIFO_SIZE
-# define BFIN_UART_TX_FIFO_SIZE 2
-#endif
-
-#endif /* __BFIN_ASM_SERIAL_H__ */
git.samba.org / sfrench / cifs-2.6.git / blobdiff