diff options
Diffstat (limited to 'target/linux/rb1xx-2.6/files/drivers/serial/adm5120_uart.c')
| -rw-r--r-- | target/linux/rb1xx-2.6/files/drivers/serial/adm5120_uart.c | 524 |
1 files changed, 0 insertions, 524 deletions
diff --git a/target/linux/rb1xx-2.6/files/drivers/serial/adm5120_uart.c b/target/linux/rb1xx-2.6/files/drivers/serial/adm5120_uart.c deleted file mode 100644 index 6b4292867..000000000 --- a/target/linux/rb1xx-2.6/files/drivers/serial/adm5120_uart.c +++ /dev/null @@ -1,524 +0,0 @@ -/* - * Serial driver for ADM5120 SoC - * - * Derived from drivers/serial/uart00.c - * Copyright 2001 Altera Corporation - * - * Some pieces are derived from the ADMtek 2.4 serial driver. - * Copyright (C) ADMtek Incorporated, 2003 - * daniell@admtek.com.tw - * Which again was derived from drivers/char/serial.c - * Copyright (C) Linus Torvalds et al. - * - * Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005 - */ - -#include <linux/autoconf.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/console.h> - -#define ADM5120_UART_BASE0 0x12600000 -#define ADM5120_UART_BASE1 0x12800000 -#define ADM5120_UART_SIZE 0x20 - -#define ADM5120_UART_IRQ0 1 -#define ADM5120_UART_IRQ1 2 - -#define ADM5120_UART_REG(base, reg) \ - (*(volatile u32 *)KSEG1ADDR((base)+(reg))) - -#define ADM5120_UARTCLK_FREQ 62500000 -#define ADM5120_UART_BAUDDIV(rate) ((unsigned long)(ADM5120_UARTCLK_FREQ/(16*(rate)) - 1)) - -#define ADM5120_UART_BAUD115200 ADM5120_UART_BAUDDIV(115200) - -#define ADM5120_UART_DATA 0x00 -#define ADM5120_UART_RS 0x04 -#define ADM5120_UART_LCR_H 0x08 -#define ADM5120_UART_LCR_M 0x0c -#define ADM5120_UART_LCR_L 0x10 -#define ADM5120_UART_CR 0x14 -#define ADM5120_UART_FR 0x18 -#define ADM5120_UART_IR 0x1c - -#define ADM5120_UART_FE 0x01 -#define ADM5120_UART_PE 0x02 -#define ADM5120_UART_BE 0x04 -#define ADM5120_UART_OE 0x08 -#define ADM5120_UART_ERR 0x0f -#define ADM5120_UART_FIFO_EN 0x10 -#define ADM5120_UART_EN 0x01 -#define ADM5120_UART_TIE 0x20 -#define ADM5120_UART_RIE 0x50 -#define ADM5120_UART_IE 0x78 -#define ADM5120_UART_CTS 0x01 -#define ADM5120_UART_DSR 0x02 -#define ADM5120_UART_DCD 0x04 -#define ADM5120_UART_TXFF 0x20 -#define ADM5120_UART_TXFE 0x80 -#define ADM5120_UART_RXFE 0x10 -#define ADM5120_UART_BRK 0x01 -#define ADM5120_UART_PEN 0x02 -#define ADM5120_UART_EPS 0x04 -#define ADM5120_UART_STP2 0x08 -#define ADM5120_UART_W5 0x00 -#define ADM5120_UART_W6 0x20 -#define ADM5120_UART_W7 0x40 -#define ADM5120_UART_W8 0x60 -#define ADM5120_UART_MIS 0x01 -#define ADM5120_UART_RIS 0x02 -#define ADM5120_UART_TIS 0x04 -#define ADM5120_UART_RTIS 0x08 - -static void adm5120ser_stop_tx(struct uart_port *port) -{ - ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) &= ~ADM5120_UART_TIE; -} - -static void adm5120ser_irq_rx(struct uart_port *port) -{ - struct tty_struct *tty = port->info->tty; - unsigned int status, ch, rds, flg, ignored = 0; - - status = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR); - while (!(status & ADM5120_UART_RXFE)) { - /* - * We need to read rds before reading the - * character from the fifo - */ - rds = ADM5120_UART_REG(port->iobase, ADM5120_UART_RS); - ch = ADM5120_UART_REG(port->iobase, ADM5120_UART_DATA); - port->icount.rx++; - - if (tty->low_latency) - tty_flip_buffer_push(tty); - - flg = TTY_NORMAL; - - /* - * Note that the error handling code is - * out of the main execution path - */ - if (rds & ADM5120_UART_ERR) - goto handle_error; - if (uart_handle_sysrq_char(port, ch)) - goto ignore_char; - - error_return: - tty_insert_flip_char(tty, ch, flg); - - ignore_char: - status = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR); - } - out: - tty_flip_buffer_push(tty); - return; - - handle_error: - ADM5120_UART_REG(port->iobase, ADM5120_UART_RS) = 0xff; - if (rds & ADM5120_UART_BE) { - port->icount.brk++; - if (uart_handle_break(port)) - goto ignore_char; - } else if (rds & ADM5120_UART_PE) - port->icount.parity++; - else if (rds & ADM5120_UART_FE) - port->icount.frame++; - if (rds & ADM5120_UART_OE) - port->icount.overrun++; - - if (rds & port->ignore_status_mask) { - if (++ignored > 100) - goto out; - goto ignore_char; - } - rds &= port->read_status_mask; - - if (rds & ADM5120_UART_BE) - flg = TTY_BREAK; - else if (rds & ADM5120_UART_PE) - flg = TTY_PARITY; - else if (rds & ADM5120_UART_FE) - flg = TTY_FRAME; - - if (rds & ADM5120_UART_OE) { - /* - * CHECK: does overrun affect the current character? - * ASSUMPTION: it does not. - */ - tty_insert_flip_char(tty, ch, flg); - ch = 0; - flg = TTY_OVERRUN; - } -#ifdef CONFIG_MAGIC_SYSRQ - port->sysrq = 0; -#endif - goto error_return; -} - -static void adm5120ser_irq_tx(struct uart_port *port) -{ - struct circ_buf *xmit = &port->info->xmit; - int count; - - if (port->x_char) { - ADM5120_UART_REG(port->iobase, ADM5120_UART_DATA) = - port->x_char; - port->icount.tx++; - port->x_char = 0; - return; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - adm5120ser_stop_tx(port); - return; - } - - count = port->fifosize >> 1; - do { - ADM5120_UART_REG(port->iobase, ADM5120_UART_DATA) = - xmit->buf[xmit->tail]; - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - adm5120ser_stop_tx(port); -} - -static void adm5120ser_irq_modem(struct uart_port *port) -{ - unsigned int status; - - status = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR); - - if (status & ADM5120_UART_DCD) - uart_handle_dcd_change(port, status & ADM5120_UART_DCD); - - if (status & ADM5120_UART_DSR) - port->icount.dsr++; - - if (status & ADM5120_UART_CTS) - uart_handle_cts_change(port, status & ADM5120_UART_CTS); - - wake_up_interruptible(&port->info->delta_msr_wait); -} - -static irqreturn_t adm5120ser_irq(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - unsigned long ir = ADM5120_UART_REG(port->iobase, ADM5120_UART_IR); - - if (ir & (ADM5120_UART_RIS | ADM5120_UART_RTIS)) - adm5120ser_irq_rx(port); - if (ir & ADM5120_UART_TIS) - adm5120ser_irq_tx(port); - if (ir & ADM5120_UART_MIS) { - adm5120ser_irq_modem(port); - ADM5120_UART_REG(port->iobase, ADM5120_UART_IR) = 0xff; - } - - return IRQ_HANDLED; -} - -static unsigned int adm5120ser_tx_empty(struct uart_port *port) -{ - unsigned int fr = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR); - return (fr & ADM5120_UART_TXFE) ? TIOCSER_TEMT : 0; -} - -static void adm5120ser_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -static unsigned int adm5120ser_get_mctrl(struct uart_port *port) -{ - unsigned int result = 0; - unsigned int fr = ADM5120_UART_REG(port->iobase, ADM5120_UART_FR); - - if (fr & ADM5120_UART_CTS) - result |= TIOCM_CTS; - if (fr & ADM5120_UART_DSR) - result |= TIOCM_DSR; - if (fr & ADM5120_UART_DCD) - result |= TIOCM_CAR; - return result; -} - -static void adm5120ser_start_tx(struct uart_port *port) -{ - ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) |= ADM5120_UART_TIE; -} - -static void adm5120ser_stop_rx(struct uart_port *port) -{ - ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) &= ~ADM5120_UART_RIE; -} - -static void adm5120ser_enable_ms(struct uart_port *port) -{ -} - -static void adm5120ser_break_ctl(struct uart_port *port, int break_state) -{ - unsigned long flags; - unsigned long lcrh; - - spin_lock_irqsave(&port->lock, flags); - lcrh = ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_H); - if (break_state == -1) - lcrh |= ADM5120_UART_BRK; - else - lcrh &= ~ADM5120_UART_BRK; - ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_H) = lcrh; - spin_unlock_irqrestore(&port->lock, flags); -} - -static int adm5120ser_startup(struct uart_port *port) -{ - int ret; - - ret = request_irq(port->irq, adm5120ser_irq, 0, "ADM5120 UART", port); - if (ret) { - printk(KERN_ERR "Couldn't get irq %d\n", port->irq); - return ret; - } - ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_H) |= - ADM5120_UART_FIFO_EN; - ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) |= - ADM5120_UART_EN | ADM5120_UART_IE; - return 0; -} - -static void adm5120ser_shutdown(struct uart_port *port) -{ - ADM5120_UART_REG(port->iobase, ADM5120_UART_CR) &= ~ADM5120_UART_IE; - free_irq(port->irq, port); -} - -static void adm5120ser_set_termios(struct uart_port *port, - struct termios *termios, struct termios *old) -{ - unsigned int baud, quot, lcrh; - unsigned long flags; - - termios->c_cflag |= CREAD; - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - lcrh = ADM5120_UART_FIFO_EN; - switch (termios->c_cflag & CSIZE) { - case CS5: - lcrh |= ADM5120_UART_W5; - break; - case CS6: - lcrh |= ADM5120_UART_W6; - break; - case CS7: - lcrh |= ADM5120_UART_W7; - break; - default: - lcrh |= ADM5120_UART_W8; - break; - } - if (termios->c_cflag & CSTOPB) - lcrh |= ADM5120_UART_STP2; - if (termios->c_cflag & PARENB) { - lcrh |= ADM5120_UART_PEN; - if (!(termios->c_cflag & PARODD)) - lcrh |= ADM5120_UART_EPS; - } - - spin_lock_irqsave(port->lock, flags); - - ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_H) = lcrh; - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - port->read_status_mask = ADM5120_UART_OE; - if (termios->c_iflag & INPCK) - port->read_status_mask |= ADM5120_UART_FE | ADM5120_UART_PE; - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= ADM5120_UART_BE; - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= ADM5120_UART_FE | ADM5120_UART_PE; - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= ADM5120_UART_BE; - /* - * If we're ignoring parity and break indicators, - * ignore overruns to (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= ADM5120_UART_OE; - } - - quot = ADM5120_UART_BAUD115200; - ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_L) = quot & 0xff; - ADM5120_UART_REG(port->iobase, ADM5120_UART_LCR_M) = quot >> 8; - - 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_UART_BASE0, ADM5120_UART_FR) & - ADM5120_UART_TXFF) != 0); - ADM5120_UART_REG(ADM5120_UART_BASE0, 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 __init adm5120console_setup(struct console *con, char *options) -{ - /* Set to 115200 baud, 8N1 and enable FIFO */ - ADM5120_UART_REG(ADM5120_UART_BASE0, ADM5120_UART_LCR_L) = - ADM5120_UART_BAUD115200 & 0xff; - ADM5120_UART_REG(ADM5120_UART_BASE0, ADM5120_UART_LCR_M) = - ADM5120_UART_BAUD115200 >> 8; - ADM5120_UART_REG(ADM5120_UART_BASE0, ADM5120_UART_LCR_H) = - ADM5120_UART_W8 | ADM5120_UART_FIFO_EN; - /* Enable port */ - ADM5120_UART_REG(ADM5120_UART_BASE0, 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_UART_BASE0, - .irq = ADM5120_UART_IRQ0, - .uartclk = ADM5120_UARTCLK_FREQ, - .fifosize = 16, - .ops = &adm5120ser_ops, - .line = 0, - .flags = ASYNC_BOOT_AUTOCONF, - }, -#if (CONFIG_ADM5120_NR_UARTS > 1) - { - .iobase = ADM5120_UART_BASE1, - .irq = ADM5120_UART_IRQ1, - .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); |