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@@ -1,520 +0,0 @@
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-/*
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- * Serial driver for ADM5120 SoC
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- *
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- * Derived from drivers/serial/uart00.c
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- * Copyright 2001 Altera Corporation
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- *
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- * Some pieces are derived from the ADMtek 2.4 serial driver.
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- * Copyright (C) ADMtek Incorporated, 2003
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- * [email protected]
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- * Which again was derived from drivers/char/serial.c
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- * Copyright (C) Linus Torvalds et al.
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- *
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- * Copyright Jeroen Vreeken ([email protected]), 2005
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- */
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-
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-#include <linux/autoconf.h>
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-#include <linux/init.h>
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-#include <linux/kernel.h>
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-#include <linux/module.h>
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-#include <linux/ioport.h>
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-#include <linux/serial.h>
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-#include <linux/serial_core.h>
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-#include <linux/tty.h>
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-#include <linux/tty_flip.h>
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-#include <linux/console.h>
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-
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-#include <asm/mach-adm5120/adm5120_defs.h>
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-#include <asm/mach-adm5120/adm5120_irq.h>
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-
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-#define ADM5120_UART_REG(base, reg) \
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- (*(volatile u32 *)KSEG1ADDR((base)+(reg)))
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-
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-#define ADM5120_UARTCLK_FREQ 62500000
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-#define ADM5120_UART_BAUDDIV(rate) ((unsigned long)(ADM5120_UARTCLK_FREQ/(16*(rate)) - 1))
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-
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-#define ADM5120_UART_BAUD115200 ADM5120_UART_BAUDDIV(115200)
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-
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-#define ADM5120_UART_DATA 0x00
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-#define ADM5120_UART_RS 0x04
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-#define ADM5120_UART_LCR_H 0x08
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-#define ADM5120_UART_LCR_M 0x0c
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-#define ADM5120_UART_LCR_L 0x10
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-#define ADM5120_UART_CR 0x14
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-#define ADM5120_UART_FR 0x18
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-#define ADM5120_UART_IR 0x1c
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-
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-#define ADM5120_UART_FE 0x01
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-#define ADM5120_UART_PE 0x02
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-#define ADM5120_UART_BE 0x04
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-#define ADM5120_UART_OE 0x08
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-#define ADM5120_UART_ERR 0x0f
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-#define ADM5120_UART_FIFO_EN 0x10
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-#define ADM5120_UART_EN 0x01
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-#define ADM5120_UART_TIE 0x20
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-#define ADM5120_UART_RIE 0x50
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-#define ADM5120_UART_IE 0x78
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-#define ADM5120_UART_CTS 0x01
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-#define ADM5120_UART_DSR 0x02
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-#define ADM5120_UART_DCD 0x04
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-#define ADM5120_UART_TXFF 0x20
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-#define ADM5120_UART_TXFE 0x80
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-#define ADM5120_UART_RXFE 0x10
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-#define ADM5120_UART_BRK 0x01
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-#define ADM5120_UART_PEN 0x02
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-#define ADM5120_UART_EPS 0x04
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-#define ADM5120_UART_STP2 0x08
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-#define ADM5120_UART_W5 0x00
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-#define ADM5120_UART_W6 0x20
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-#define ADM5120_UART_W7 0x40
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-#define ADM5120_UART_W8 0x60
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-#define ADM5120_UART_MIS 0x01
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-#define ADM5120_UART_RIS 0x02
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-#define ADM5120_UART_TIS 0x04
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-#define ADM5120_UART_RTIS 0x08
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-
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-static void adm5120ser_stop_tx(struct uart_port *port)
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-{
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) &= ~ADM5120_UART_TIE;
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-}
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-
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-static void adm5120ser_irq_rx(struct uart_port *port)
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-{
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- struct tty_struct *tty = port->info->tty;
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- unsigned int status, ch, rds, flg, ignored = 0;
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-
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- status = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR);
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- while (!(status & ADM5120_UART_RXFE)) {
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- /*
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- * We need to read rds before reading the
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- * character from the fifo
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- */
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- rds = ADM5120_UART_REG(port->iobase, ADM5120_UART_RS);
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- ch = ADM5120_UART_REG(port->iobase, ADM5120_UART_DATA);
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- port->icount.rx++;
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-
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- if (tty->low_latency)
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- tty_flip_buffer_push(tty);
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-
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- flg = TTY_NORMAL;
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-
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- /*
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- * Note that the error handling code is
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- * out of the main execution path
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- */
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- if (rds & ADM5120_UART_ERR)
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- goto handle_error;
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- if (uart_handle_sysrq_char(port, ch))
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- goto ignore_char;
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-
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- error_return:
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- tty_insert_flip_char(tty, ch, flg);
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-
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- ignore_char:
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- status = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR);
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- }
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- out:
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- tty_flip_buffer_push(tty);
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- return;
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-
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- handle_error:
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_RS) = 0xff;
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- if (rds & ADM5120_UART_BE) {
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- port->icount.brk++;
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- if (uart_handle_break(port))
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- goto ignore_char;
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- } else if (rds & ADM5120_UART_PE)
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- port->icount.parity++;
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- else if (rds & ADM5120_UART_FE)
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- port->icount.frame++;
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- if (rds & ADM5120_UART_OE)
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- port->icount.overrun++;
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-
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- if (rds & port->ignore_status_mask) {
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- if (++ignored > 100)
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- goto out;
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- goto ignore_char;
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- }
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- rds &= port->read_status_mask;
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-
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- if (rds & ADM5120_UART_BE)
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- flg = TTY_BREAK;
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- else if (rds & ADM5120_UART_PE)
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- flg = TTY_PARITY;
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- else if (rds & ADM5120_UART_FE)
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- flg = TTY_FRAME;
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-
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- if (rds & ADM5120_UART_OE) {
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- /*
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- * CHECK: does overrun affect the current character?
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- * ASSUMPTION: it does not.
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- */
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- tty_insert_flip_char(tty, ch, flg);
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- ch = 0;
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- flg = TTY_OVERRUN;
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- }
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-#ifdef CONFIG_MAGIC_SYSRQ
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- port->sysrq = 0;
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-#endif
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- goto error_return;
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-}
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-
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-static void adm5120ser_irq_tx(struct uart_port *port)
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-{
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- struct circ_buf *xmit = &port->info->xmit;
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- int count;
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-
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- if (port->x_char) {
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_DATA) =
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- port->x_char;
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- port->icount.tx++;
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- port->x_char = 0;
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- return;
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- }
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- if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
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- adm5120ser_stop_tx(port);
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- return;
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- }
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-
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- count = port->fifosize >> 1;
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- do {
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_DATA) =
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- xmit->buf[xmit->tail];
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- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
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- port->icount.tx++;
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- if (uart_circ_empty(xmit))
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- break;
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- } while (--count > 0);
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-
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- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
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- uart_write_wakeup(port);
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-
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- if (uart_circ_empty(xmit))
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- adm5120ser_stop_tx(port);
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-}
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-
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-static void adm5120ser_irq_modem(struct uart_port *port)
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-{
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- unsigned int status;
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-
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- status = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR);
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-
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- if (status & ADM5120_UART_DCD)
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- uart_handle_dcd_change(port, status & ADM5120_UART_DCD);
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-
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- if (status & ADM5120_UART_DSR)
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- port->icount.dsr++;
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-
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- if (status & ADM5120_UART_CTS)
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- uart_handle_cts_change(port, status & ADM5120_UART_CTS);
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-
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- wake_up_interruptible(&port->info->delta_msr_wait);
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-}
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-
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-static irqreturn_t adm5120ser_irq(int irq, void *dev_id)
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-{
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- struct uart_port *port = dev_id;
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- unsigned long ir = ADM5120_UART_REG(port->iobase, ADM5120_UART_IR);
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-
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- if (ir & (ADM5120_UART_RIS | ADM5120_UART_RTIS))
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- adm5120ser_irq_rx(port);
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- if (ir & ADM5120_UART_TIS)
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- adm5120ser_irq_tx(port);
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- if (ir & ADM5120_UART_MIS) {
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- adm5120ser_irq_modem(port);
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_IR) = 0xff;
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- }
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-
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- return IRQ_HANDLED;
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-}
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-
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-static unsigned int adm5120ser_tx_empty(struct uart_port *port)
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-{
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- unsigned int fr = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR);
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- return (fr & ADM5120_UART_TXFE) ? TIOCSER_TEMT : 0;
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-}
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-
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-static void adm5120ser_set_mctrl(struct uart_port *port, unsigned int mctrl)
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-{
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-}
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-
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-static unsigned int adm5120ser_get_mctrl(struct uart_port *port)
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-{
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- unsigned int result = 0;
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- unsigned int fr = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR);
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-
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- if (fr & ADM5120_UART_CTS)
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- result |= TIOCM_CTS;
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- if (fr & ADM5120_UART_DSR)
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- result |= TIOCM_DSR;
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- if (fr & ADM5120_UART_DCD)
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- result |= TIOCM_CAR;
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- return result;
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-}
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-
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-static void adm5120ser_start_tx(struct uart_port *port)
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-{
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) |= ADM5120_UART_TIE;
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-}
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-
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-static void adm5120ser_stop_rx(struct uart_port *port)
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-{
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) &= ~ADM5120_UART_RIE;
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-}
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-
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-static void adm5120ser_enable_ms(struct uart_port *port)
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-{
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-}
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-
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-static void adm5120ser_break_ctl(struct uart_port *port, int break_state)
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-{
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- unsigned long flags;
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- unsigned long lcrh;
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-
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- spin_lock_irqsave(&port->lock, flags);
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- lcrh = ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_H);
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- if (break_state == -1)
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- lcrh |= ADM5120_UART_BRK;
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- else
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- lcrh &= ~ADM5120_UART_BRK;
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_H) = lcrh;
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- spin_unlock_irqrestore(&port->lock, flags);
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-}
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-
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-static int adm5120ser_startup(struct uart_port *port)
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-{
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- int ret;
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-
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- ret = request_irq(port->irq, adm5120ser_irq, 0, "ADM5120 UART", port);
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- if (ret) {
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- printk(KERN_ERR "Couldn't get irq %d\n", port->irq);
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- return ret;
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- }
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_H) |=
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- ADM5120_UART_FIFO_EN;
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) |=
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- ADM5120_UART_EN | ADM5120_UART_IE;
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- return 0;
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-}
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-
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-static void adm5120ser_shutdown(struct uart_port *port)
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-{
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) &= ~ADM5120_UART_IE;
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- free_irq(port->irq, port);
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-}
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-
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-static void adm5120ser_set_termios(struct uart_port *port,
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- struct ktermios *termios, struct ktermios *old)
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-{
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- unsigned int baud, quot, lcrh;
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- unsigned long flags;
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-
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- termios->c_cflag |= CREAD;
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-
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- baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
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- quot = uart_get_divisor(port, baud);
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-
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- lcrh = ADM5120_UART_FIFO_EN;
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- switch (termios->c_cflag & CSIZE) {
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- case CS5:
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- lcrh |= ADM5120_UART_W5;
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- break;
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- case CS6:
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- lcrh |= ADM5120_UART_W6;
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- break;
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- case CS7:
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- lcrh |= ADM5120_UART_W7;
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- break;
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- default:
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- lcrh |= ADM5120_UART_W8;
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- break;
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- }
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- if (termios->c_cflag & CSTOPB)
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- lcrh |= ADM5120_UART_STP2;
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- if (termios->c_cflag & PARENB) {
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- lcrh |= ADM5120_UART_PEN;
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- if (!(termios->c_cflag & PARODD))
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- lcrh |= ADM5120_UART_EPS;
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- }
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-
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- spin_lock_irqsave(port->lock, flags);
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-
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_H) = lcrh;
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-
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- /*
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- * Update the per-port timeout.
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- */
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- uart_update_timeout(port, termios->c_cflag, baud);
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-
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- port->read_status_mask = ADM5120_UART_OE;
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- if (termios->c_iflag & INPCK)
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- port->read_status_mask |= ADM5120_UART_FE | ADM5120_UART_PE;
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- if (termios->c_iflag & (BRKINT | PARMRK))
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- port->read_status_mask |= ADM5120_UART_BE;
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-
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- /*
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- * Characters to ignore
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- */
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- port->ignore_status_mask = 0;
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- if (termios->c_iflag & IGNPAR)
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- port->ignore_status_mask |= ADM5120_UART_FE | ADM5120_UART_PE;
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- if (termios->c_iflag & IGNBRK) {
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- port->ignore_status_mask |= ADM5120_UART_BE;
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- /*
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- * If we're ignoring parity and break indicators,
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- * ignore overruns to (for real raw support).
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- */
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- if (termios->c_iflag & IGNPAR)
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- port->ignore_status_mask |= ADM5120_UART_OE;
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- }
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-
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- quot = ADM5120_UART_BAUD115200;
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_L) = quot & 0xff;
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- ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_M) = quot >> 8;
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-
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- spin_unlock_irqrestore(&port->lock, flags);
|
|
|
-}
|
|
|
-
|
|
|
-static const char *adm5120ser_type(struct uart_port *port)
|
|
|
-{
|
|
|
- return port->type == PORT_ADM5120 ? "ADM5120" : NULL;
|
|
|
-}
|
|
|
-
|
|
|
-static void adm5120ser_config_port(struct uart_port *port, int flags)
|
|
|
-{
|
|
|
- if (flags & UART_CONFIG_TYPE)
|
|
|
- port->type = PORT_ADM5120;
|
|
|
-}
|
|
|
-
|
|
|
-static void adm5120ser_release_port(struct uart_port *port)
|
|
|
-{
|
|
|
- release_mem_region(port->iobase, ADM5120_UART_SIZE);
|
|
|
-}
|
|
|
-
|
|
|
-static int adm5120ser_request_port(struct uart_port *port)
|
|
|
-{
|
|
|
- return request_mem_region(port->iobase, ADM5120_UART_SIZE,
|
|
|
- "adm5120-uart") != NULL ? 0 : -EBUSY;
|
|
|
-}
|
|
|
-
|
|
|
-static struct uart_ops adm5120ser_ops = {
|
|
|
- .tx_empty = adm5120ser_tx_empty,
|
|
|
- .set_mctrl = adm5120ser_set_mctrl,
|
|
|
- .get_mctrl = adm5120ser_get_mctrl,
|
|
|
- .stop_tx = adm5120ser_stop_tx,
|
|
|
- .start_tx = adm5120ser_start_tx,
|
|
|
- .stop_rx = adm5120ser_stop_rx,
|
|
|
- .enable_ms = adm5120ser_enable_ms,
|
|
|
- .break_ctl = adm5120ser_break_ctl,
|
|
|
- .startup = adm5120ser_startup,
|
|
|
- .shutdown = adm5120ser_shutdown,
|
|
|
- .set_termios = adm5120ser_set_termios,
|
|
|
- .type = adm5120ser_type,
|
|
|
- .config_port = adm5120ser_config_port,
|
|
|
- .release_port = adm5120ser_release_port,
|
|
|
- .request_port = adm5120ser_request_port,
|
|
|
-};
|
|
|
-
|
|
|
-static void adm5120console_put(const char c)
|
|
|
-{
|
|
|
- while ((ADM5120_UART_REG(ADM5120_UART0_BASE, ADM5120_UART_FR) &
|
|
|
- ADM5120_UART_TXFF) != 0);
|
|
|
- ADM5120_UART_REG(ADM5120_UART0_BASE, ADM5120_UART_DATA) = c;
|
|
|
-}
|
|
|
-
|
|
|
-static void adm5120console_write(struct console *con, const char *s,
|
|
|
- unsigned int count)
|
|
|
-{
|
|
|
- while (count--) {
|
|
|
- if (*s == '\n')
|
|
|
- adm5120console_put('\r');
|
|
|
- adm5120console_put(*s);
|
|
|
- s++;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static int adm5120console_setup(struct console *con, char *options)
|
|
|
-{
|
|
|
- /* Set to 115200 baud, 8N1 and enable FIFO */
|
|
|
- ADM5120_UART_REG(ADM5120_UART0_BASE, ADM5120_UART_LCR_L) =
|
|
|
- ADM5120_UART_BAUD115200 & 0xff;
|
|
|
- ADM5120_UART_REG(ADM5120_UART0_BASE, ADM5120_UART_LCR_M) =
|
|
|
- ADM5120_UART_BAUD115200 >> 8;
|
|
|
- ADM5120_UART_REG(ADM5120_UART0_BASE, ADM5120_UART_LCR_H) =
|
|
|
- ADM5120_UART_W8 | ADM5120_UART_FIFO_EN;
|
|
|
- /* Enable port */
|
|
|
- ADM5120_UART_REG(ADM5120_UART0_BASE, ADM5120_UART_CR) =
|
|
|
- ADM5120_UART_EN;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static struct uart_driver adm5120ser_reg;
|
|
|
-
|
|
|
-static struct console adm5120_serconsole = {
|
|
|
- .name = "ttyS",
|
|
|
- .write = adm5120console_write,
|
|
|
- .device = uart_console_device,
|
|
|
- .setup = adm5120console_setup,
|
|
|
- .flags = CON_PRINTBUFFER,
|
|
|
- .cflag = B115200 | CS8 | CREAD,
|
|
|
- .index = 0,
|
|
|
- .data = &adm5120ser_reg,
|
|
|
-};
|
|
|
-
|
|
|
-static int __init adm5120console_init(void)
|
|
|
-{
|
|
|
- register_console(&adm5120_serconsole);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-console_initcall(adm5120console_init);
|
|
|
-
|
|
|
-
|
|
|
-static struct uart_port adm5120ser_ports[] = {
|
|
|
- {
|
|
|
- .iobase = ADM5120_UART0_BASE,
|
|
|
- .irq = ADM5120_IRQ_UART0,
|
|
|
- .uartclk = ADM5120_UARTCLK_FREQ,
|
|
|
- .fifosize = 16,
|
|
|
- .ops = &adm5120ser_ops,
|
|
|
- .line = 0,
|
|
|
- .flags = ASYNC_BOOT_AUTOCONF,
|
|
|
- },
|
|
|
-#if (CONFIG_ADM5120_NR_UARTS > 1)
|
|
|
- {
|
|
|
- .iobase = ADM5120_UART1_BASE,
|
|
|
- .irq = ADM5120_IRQ_UART1,
|
|
|
- .uartclk = ADM5120_UARTCLK_FREQ,
|
|
|
- .fifosize = 16,
|
|
|
- .ops = &adm5120ser_ops,
|
|
|
- .line = 1,
|
|
|
- .flags = ASYNC_BOOT_AUTOCONF,
|
|
|
- },
|
|
|
-#endif
|
|
|
-};
|
|
|
-
|
|
|
-static struct uart_driver adm5120ser_reg = {
|
|
|
- .owner = THIS_MODULE,
|
|
|
- .driver_name = "ttyS",
|
|
|
- .dev_name = "ttyS",
|
|
|
- .major = TTY_MAJOR,
|
|
|
- .minor = 64,
|
|
|
- .nr = CONFIG_ADM5120_NR_UARTS,
|
|
|
- .cons = &adm5120_serconsole,
|
|
|
-};
|
|
|
-
|
|
|
-static int __init adm5120ser_init(void)
|
|
|
-{
|
|
|
- int ret, i;
|
|
|
-
|
|
|
- ret = uart_register_driver(&adm5120ser_reg);
|
|
|
- if (!ret) {
|
|
|
- for (i = 0; i < CONFIG_ADM5120_NR_UARTS; i++)
|
|
|
- uart_add_one_port(&adm5120ser_reg, &adm5120ser_ports[i]);
|
|
|
- }
|
|
|
-
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-__initcall(adm5120ser_init);
|