From: Ralf Baechle Three new MIPS-specific serial drivers. ip22.c is derived from the sparc zilog driver; guess we should write a generic Zilog driver somewhen ... --- 25-akpm/drivers/serial/Kconfig | 51 + 25-akpm/drivers/serial/Makefile | 3 25-akpm/drivers/serial/au1x00_uart.c | 1393 +++++++++++++++++++++++++++++++++++ 25-akpm/drivers/serial/dz.c | 827 ++++++++++++++++++++ 25-akpm/drivers/serial/dz.h | 118 ++ 25-akpm/drivers/serial/ip22zilog.c | 1307 ++++++++++++++++++++++++++++++++ 25-akpm/drivers/serial/ip22zilog.h | 281 +++++++ 7 files changed, 3980 insertions(+) diff -puN /dev/null drivers/serial/au1x00_uart.c --- /dev/null Thu Apr 11 07:25:15 2002 +++ 25-akpm/drivers/serial/au1x00_uart.c Thu Feb 5 14:44:19 2004 @@ -0,0 +1,1393 @@ +/* + * Driver for 8250/16550-type serial ports + * + * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. + * + * Copyright (C) 2001 Russell King. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * A note about mapbase / membase + * + * mapbase is the physical address of the IO port. Currently, we don't + * support this very well, and it may well be dropped from this driver + * in future. As such, mapbase should be NULL. + * + * membase is an 'ioremapped' cookie. This is compatible with the old + * serial.c driver, and is currently the preferred form. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#if defined(CONFIG_SERIAL_AU1X00_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + +#include +#include "8250.h" + +/* + * Debugging. + */ +#if 0 +#define DEBUG_AUTOCONF(fmt...) printk(fmt) +#else +#define DEBUG_AUTOCONF(fmt...) do { } while (0) +#endif + +#if 0 +#define DEBUG_INTR(fmt...) printk(fmt) +#else +#define DEBUG_INTR(fmt...) do { } while (0) +#endif + +#define PASS_LIMIT 256 + +/* + * We default to IRQ0 for the "no irq" hack. Some + * machine types want others as well - they're free + * to redefine this in their header file. + */ +#define is_real_interrupt(irq) ((irq) != 0) + +static struct old_serial_port old_serial_port[] = { + { .baud_base = 0, + .iomem_base = (u8 *)UART0_ADDR, + .irq = AU1000_UART0_INT, + .flags = STD_COM_FLAGS, + .iomem_reg_shift = 2, + }, { + .baud_base = 0, + .iomem_base = (u8 *)UART1_ADDR, + .irq = AU1000_UART1_INT, + .flags = STD_COM_FLAGS, + .iomem_reg_shift = 2 + }, { + .baud_base = 0, + .iomem_base = (u8 *)UART2_ADDR, + .irq = AU1000_UART2_INT, + .flags = STD_COM_FLAGS, + .iomem_reg_shift = 2 + }, { + .baud_base = 0, + .iomem_base = (u8 *)UART3_ADDR, + .irq = AU1000_UART3_INT, + .flags = STD_COM_FLAGS, + .iomem_reg_shift = 2 + } +}; + +#define UART_NR ARRAY_SIZE(old_serial_port) + +struct uart_8250_port { + struct uart_port port; + struct timer_list timer; /* "no irq" timer */ + struct list_head list; /* ports on this IRQ */ + unsigned short rev; + unsigned char acr; + unsigned char ier; + unsigned char lcr; + unsigned char mcr_mask; /* mask of user bits */ + unsigned char mcr_force; /* mask of forced bits */ + unsigned char lsr_break_flag; + + /* + * We provide a per-port pm hook. + */ + void (*pm)(struct uart_port *port, + unsigned int state, unsigned int old); +}; + +struct irq_info { + spinlock_t lock; + struct list_head *head; +}; + +static struct irq_info irq_lists[NR_IRQS]; + +/* + * Here we define the default xmit fifo size used for each type of UART. + */ +static const struct serial_uart_config uart_config[PORT_MAX_8250+1] = { + { "unknown", 1, 0 }, + { "8250", 1, 0 }, + { "16450", 1, 0 }, + { "16550", 1, 0 }, + /* PORT_16550A */ + { "AU1X00_UART",16, UART_CLEAR_FIFO | UART_USE_FIFO }, +}; + +static _INLINE_ unsigned int serial_in(struct uart_8250_port *up, int offset) +{ + return au_readl((unsigned long)up->port.membase + offset); +} + +static _INLINE_ void +serial_out(struct uart_8250_port *up, int offset, int value) +{ + au_writel(value, (unsigned long)up->port.membase + offset); +} + +#define serial_inp(up, offset) serial_in(up, offset) +#define serial_outp(up, offset, value) serial_out(up, offset, value) + +/* + * This routine is called by rs_init() to initialize a specific serial + * port. It determines what type of UART chip this serial port is + * using: 8250, 16450, 16550, 16550A. The important question is + * whether or not this UART is a 16550A or not, since this will + * determine whether or not we can use its FIFO features or not. + */ +static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) +{ + unsigned char save_lcr, save_mcr; + unsigned long flags; + + if (!up->port.iobase && !up->port.mapbase && !up->port.membase) + return; + + DEBUG_AUTOCONF("ttyS%d: autoconf (0x%04x, 0x%08lx): ", + up->port.line, up->port.iobase, up->port.membase); + + /* + * We really do need global IRQs disabled here - we're going to + * be frobbing the chips IRQ enable register to see if it exists. + */ + spin_lock_irqsave(&up->port.lock, flags); +// save_flags(flags); cli(); + + save_mcr = serial_in(up, UART_MCR); + save_lcr = serial_in(up, UART_LCR); + + up->port.type = PORT_16550A; + serial_outp(up, UART_LCR, save_lcr); + + up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; + + if (up->port.type == PORT_UNKNOWN) + goto out; + + /* + * Reset the UART. + */ + serial_outp(up, UART_MCR, save_mcr); + serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO | + UART_FCR_CLEAR_RCVR | + UART_FCR_CLEAR_XMIT)); + serial_outp(up, UART_FCR, 0); + (void)serial_in(up, UART_RX); + serial_outp(up, UART_IER, 0); + + out: + spin_unlock_irqrestore(&up->port.lock, flags); +// restore_flags(flags); + DEBUG_AUTOCONF("type=%s\n", uart_config[up->port.type].name); +} + +static void serial8250_stop_tx(struct uart_port *port, unsigned int tty_stop) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + + if (up->ier & UART_IER_THRI) { + up->ier &= ~UART_IER_THRI; + serial_out(up, UART_IER, up->ier); + } +} + +static void serial8250_start_tx(struct uart_port *port, unsigned int tty_start) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + + if (!(up->ier & UART_IER_THRI)) { + up->ier |= UART_IER_THRI; + serial_out(up, UART_IER, up->ier); + } +} + +static void serial8250_stop_rx(struct uart_port *port) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + + up->ier &= ~UART_IER_RLSI; + up->port.read_status_mask &= ~UART_LSR_DR; + serial_out(up, UART_IER, up->ier); +} + +static void serial8250_enable_ms(struct uart_port *port) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + + up->ier |= UART_IER_MSI; + serial_out(up, UART_IER, up->ier); +} + +static _INLINE_ void +receive_chars(struct uart_8250_port *up, int *status, struct pt_regs *regs) +{ + struct tty_struct *tty = up->port.info->tty; + unsigned char ch; + int max_count = 256; + + do { + if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) { + tty->flip.work.func((void *)tty); + if (tty->flip.count >= TTY_FLIPBUF_SIZE) + return; // if TTY_DONT_FLIP is set + } + ch = serial_inp(up, UART_RX); + *tty->flip.char_buf_ptr = ch; + *tty->flip.flag_buf_ptr = TTY_NORMAL; + up->port.icount.rx++; + + if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | + UART_LSR_FE | UART_LSR_OE))) { + /* + * For statistics only + */ + if (*status & UART_LSR_BI) { + *status &= ~(UART_LSR_FE | UART_LSR_PE); + 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 (*status & UART_LSR_PE) + up->port.icount.parity++; + else if (*status & UART_LSR_FE) + up->port.icount.frame++; + if (*status & UART_LSR_OE) + up->port.icount.overrun++; + + /* + * Mask off conditions which should be ingored. + */ + *status &= up->port.read_status_mask; + +#ifdef CONFIG_SERIAL_AU1X00_CONSOLE + if (up->port.line == up->port.cons->index) { + /* Recover the break flag from console xmit */ + *status |= up->lsr_break_flag; + up->lsr_break_flag = 0; + } +#endif + if (*status & UART_LSR_BI) { + DEBUG_INTR("handling break...."); + *tty->flip.flag_buf_ptr = TTY_BREAK; + } else if (*status & UART_LSR_PE) + *tty->flip.flag_buf_ptr = TTY_PARITY; + else if (*status & UART_LSR_FE) + *tty->flip.flag_buf_ptr = TTY_FRAME; + } + if (uart_handle_sysrq_char(&up->port, ch, regs)) + goto ignore_char; + if ((*status & up->port.ignore_status_mask) == 0) { + tty->flip.flag_buf_ptr++; + tty->flip.char_buf_ptr++; + tty->flip.count++; + } + if ((*status & UART_LSR_OE) && + tty->flip.count < TTY_FLIPBUF_SIZE) { + /* + * Overrun is special, since it's reported + * immediately, and doesn't affect the current + * character. + */ + *tty->flip.flag_buf_ptr = TTY_OVERRUN; + tty->flip.flag_buf_ptr++; + tty->flip.char_buf_ptr++; + tty->flip.count++; + } + ignore_char: + *status = serial_inp(up, UART_LSR); + } while ((*status & UART_LSR_DR) && (max_count-- > 0)); + tty_flip_buffer_push(tty); +} + +static _INLINE_ void transmit_chars(struct uart_8250_port *up) +{ + struct circ_buf *xmit = &up->port.info->xmit; + int count; + + if (up->port.x_char) { + serial_outp(up, UART_TX, up->port.x_char); + up->port.icount.tx++; + up->port.x_char = 0; + return; + } + if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { + serial8250_stop_tx(&up->port, 0); + return; + } + + count = up->port.fifosize; + do { + serial_out(up, UART_TX, 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); + + DEBUG_INTR("THRE..."); + + if (uart_circ_empty(xmit)) + serial8250_stop_tx(&up->port, 0); +} + +static _INLINE_ void check_modem_status(struct uart_8250_port *up) +{ + int status; + + status = serial_in(up, UART_MSR); + + if ((status & UART_MSR_ANY_DELTA) == 0) + return; + + if (status & UART_MSR_TERI) + up->port.icount.rng++; + if (status & UART_MSR_DDSR) + up->port.icount.dsr++; + if (status & UART_MSR_DDCD) + uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); + if (status & UART_MSR_DCTS) + uart_handle_cts_change(&up->port, status & UART_MSR_CTS); + + wake_up_interruptible(&up->port.info->delta_msr_wait); +} + +/* + * This handles the interrupt from one port. + */ +static inline void +serial8250_handle_port(struct uart_8250_port *up, struct pt_regs *regs) +{ + unsigned int status = serial_inp(up, UART_LSR); + + DEBUG_INTR("status = %x...", status); + + if (status & UART_LSR_DR) + receive_chars(up, &status, regs); + check_modem_status(up); + if (status & UART_LSR_THRE) + transmit_chars(up); +} + +/* + * This is the serial driver's interrupt routine. + * + * Arjan thinks the old way was overly complex, so it got simplified. + * Alan disagrees, saying that need the complexity to handle the weird + * nature of ISA shared interrupts. (This is a special exception.) + * + * In order to handle ISA shared interrupts properly, we need to check + * that all ports have been serviced, and therefore the ISA interrupt + * line has been de-asserted. + * + * This means we need to loop through all ports. checking that they + * don't have an interrupt pending. + */ +static irqreturn_t serial8250_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct irq_info *i = dev_id; + struct list_head *l, *end = NULL; + int pass_counter = 0; + + DEBUG_INTR("serial8250_interrupt(%d)...", irq); + + spin_lock(&i->lock); + + l = i->head; + do { + struct uart_8250_port *up; + unsigned int iir; + + up = list_entry(l, struct uart_8250_port, list); + + iir = serial_in(up, UART_IIR); + if (!(iir & UART_IIR_NO_INT)) { + spin_lock(&up->port.lock); + serial8250_handle_port(up, regs); + spin_unlock(&up->port.lock); + + end = NULL; + } else if (end == NULL) + end = l; + + l = l->next; + + if (l == i->head && pass_counter++ > PASS_LIMIT) { + /* If we hit this, we're dead. */ + printk(KERN_ERR "serial8250: too much work for " + "irq%d\n", irq); + break; + } + } while (l != end); + + spin_unlock(&i->lock); + + DEBUG_INTR("end.\n"); + /* FIXME! Was it really ours? */ + return IRQ_HANDLED; +} + +/* + * To support ISA shared interrupts, we need to have one interrupt + * handler that ensures that the IRQ line has been deasserted + * before returning. Failing to do this will result in the IRQ + * line being stuck active, and, since ISA irqs are edge triggered, + * no more IRQs will be seen. + */ +static void serial_do_unlink(struct irq_info *i, struct uart_8250_port *up) +{ + spin_lock_irq(&i->lock); + + if (!list_empty(i->head)) { + if (i->head == &up->list) + i->head = i->head->next; + list_del(&up->list); + } else { + BUG_ON(i->head != &up->list); + i->head = NULL; + } + + spin_unlock_irq(&i->lock); +} + +static int serial_link_irq_chain(struct uart_8250_port *up) +{ + struct irq_info *i = irq_lists + up->port.irq; + int ret, irq_flags = up->port.flags & UPF_SHARE_IRQ ? SA_SHIRQ : 0; + + spin_lock_irq(&i->lock); + + if (i->head) { + list_add(&up->list, i->head); + spin_unlock_irq(&i->lock); + + ret = 0; + } else { + INIT_LIST_HEAD(&up->list); + i->head = &up->list; + spin_unlock_irq(&i->lock); + + ret = request_irq(up->port.irq, serial8250_interrupt, + irq_flags, "serial", i); + if (ret < 0) + serial_do_unlink(i, up); + } + + return ret; +} + +static void serial_unlink_irq_chain(struct uart_8250_port *up) +{ + struct irq_info *i = irq_lists + up->port.irq; + + BUG_ON(i->head == NULL); + + if (list_empty(i->head)) + free_irq(up->port.irq, i); + + serial_do_unlink(i, up); +} + +/* + * This function is used to handle ports that do not have an + * interrupt. This doesn't work very well for 16450's, but gives + * barely passable results for a 16550A. (Although at the expense + * of much CPU overhead). + */ +static void serial8250_timeout(unsigned long data) +{ + struct uart_8250_port *up = (struct uart_8250_port *)data; + unsigned int timeout; + unsigned int iir; + + iir = serial_in(up, UART_IIR); + if (!(iir & UART_IIR_NO_INT)) { + spin_lock(&up->port.lock); + serial8250_handle_port(up, NULL); + spin_unlock(&up->port.lock); + } + + timeout = up->port.timeout; + timeout = timeout > 6 ? (timeout / 2 - 2) : 1; + mod_timer(&up->timer, jiffies + timeout); +} + +static unsigned int serial8250_tx_empty(struct uart_port *port) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + unsigned long flags; + unsigned int ret; + + spin_lock_irqsave(&up->port.lock, flags); + ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; + spin_unlock_irqrestore(&up->port.lock, flags); + + return ret; +} + +static unsigned int serial8250_get_mctrl(struct uart_port *port) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + unsigned long flags; + unsigned char status; + unsigned int ret; + + spin_lock_irqsave(&up->port.lock, flags); + status = serial_in(up, UART_MSR); + spin_unlock_irqrestore(&up->port.lock, flags); + + ret = 0; + if (status & UART_MSR_DCD) + ret |= TIOCM_CAR; + if (status & UART_MSR_RI) + ret |= TIOCM_RNG; + if (status & UART_MSR_DSR) + ret |= TIOCM_DSR; + if (status & UART_MSR_CTS) + ret |= TIOCM_CTS; + return ret; +} + +static void serial8250_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + unsigned char mcr = 0; + + if (mctrl & TIOCM_RTS) + mcr |= UART_MCR_RTS; + if (mctrl & TIOCM_DTR) + mcr |= UART_MCR_DTR; + if (mctrl & TIOCM_OUT1) + mcr |= UART_MCR_OUT1; + if (mctrl & TIOCM_OUT2) + mcr |= UART_MCR_OUT2; + if (mctrl & TIOCM_LOOP) + mcr |= UART_MCR_LOOP; + + mcr = (mcr & up->mcr_mask) | up->mcr_force; + + serial_out(up, UART_MCR, mcr); +} + +static void serial8250_break_ctl(struct uart_port *port, int break_state) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + unsigned long flags; + + spin_lock_irqsave(&up->port.lock, flags); + if (break_state == -1) + up->lcr |= UART_LCR_SBC; + else + up->lcr &= ~UART_LCR_SBC; + serial_out(up, UART_LCR, up->lcr); + spin_unlock_irqrestore(&up->port.lock, flags); +} + +static int serial8250_startup(struct uart_port *port) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + unsigned long flags; + int retval; + + /* + * Clear the FIFO buffers and disable them. + * (they will be reeanbled in set_termios()) + */ + if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) { + serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); + serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | + UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); + serial_outp(up, UART_FCR, 0); + } + + /* + * Clear the interrupt registers. + */ + (void) serial_inp(up, UART_LSR); + (void) serial_inp(up, UART_RX); + (void) serial_inp(up, UART_IIR); + (void) serial_inp(up, UART_MSR); + + /* + * At this point, there's no way the LSR could still be 0xff; + * if it is, then bail out, because there's likely no UART + * here. + */ + if (!(up->port.flags & UPF_BUGGY_UART) && + (serial_inp(up, UART_LSR) == 0xff)) { + printk("ttyS%d: LSR safety check engaged!\n", up->port.line); + return -ENODEV; + } + + retval = serial_link_irq_chain(up); + if (retval) + return retval; + + /* + * Now, initialize the UART + */ + serial_outp(up, UART_LCR, UART_LCR_WLEN8); + + spin_lock_irqsave(&up->port.lock, flags); + if (up->port.flags & UPF_FOURPORT) { + if (!is_real_interrupt(up->port.irq)) + up->port.mctrl |= TIOCM_OUT1; + } else + /* + * Most PC uarts need OUT2 raised to enable interrupts. + */ + if (is_real_interrupt(up->port.irq)) + up->port.mctrl |= TIOCM_OUT2; + + serial8250_set_mctrl(&up->port, up->port.mctrl); + spin_unlock_irqrestore(&up->port.lock, flags); + + /* + * Finally, enable interrupts. Note: Modem status interrupts + * are set via set_termios(), which will be occurring imminently + * anyway, so we don't enable them here. + */ + up->ier = UART_IER_RLSI | UART_IER_RDI; + serial_outp(up, UART_IER, up->ier); + + if (up->port.flags & UPF_FOURPORT) { + unsigned int icp; + /* + * Enable interrupts on the AST Fourport board + */ + icp = (up->port.iobase & 0xfe0) | 0x01f; + outb_p(0x80, icp); + (void) inb_p(icp); + } + + /* + * And clear the interrupt registers again for luck. + */ + (void) serial_inp(up, UART_LSR); + (void) serial_inp(up, UART_RX); + (void) serial_inp(up, UART_IIR); + (void) serial_inp(up, UART_MSR); + + return 0; +} + +static void serial8250_shutdown(struct uart_port *port) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + unsigned long flags; + + /* + * Disable interrupts from this port + */ + up->ier = 0; + serial_outp(up, UART_IER, 0); + + spin_lock_irqsave(&up->port.lock, flags); + if (up->port.flags & UPF_FOURPORT) { + /* reset interrupts on the AST Fourport board */ + inb((up->port.iobase & 0xfe0) | 0x1f); + up->port.mctrl |= TIOCM_OUT1; + } else + up->port.mctrl &= ~TIOCM_OUT2; + + serial8250_set_mctrl(&up->port, up->port.mctrl); + spin_unlock_irqrestore(&up->port.lock, flags); + + /* + * Disable break condition and FIFOs + */ + serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC); + serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | + UART_FCR_CLEAR_RCVR | + UART_FCR_CLEAR_XMIT); + serial_outp(up, UART_FCR, 0); + + /* + * Read data port to reset things, and then unlink from + * the IRQ chain. + */ + (void) serial_in(up, UART_RX); + + if (!is_real_interrupt(up->port.irq)) + del_timer_sync(&up->timer); + else + serial_unlink_irq_chain(up); +} + +static unsigned int serial8250_get_divisor(struct uart_port *port, unsigned int baud) +{ + unsigned int quot; + + /* + * Handle magic divisors for baud rates above baud_base on + * SMSC SuperIO chips. + */ + if ((port->flags & UPF_MAGIC_MULTIPLIER) && + baud == (port->uartclk/4)) + quot = 0x8001; + else if ((port->flags & UPF_MAGIC_MULTIPLIER) && + baud == (port->uartclk/8)) + quot = 0x8002; + else + quot = uart_get_divisor(port, baud); + + return quot; +} + +static void +serial8250_set_termios(struct uart_port *port, struct termios *termios, + struct termios *old) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + unsigned char cval, fcr = 0; + unsigned long flags; + unsigned int baud, quot; + + switch (termios->c_cflag & CSIZE) { + case CS5: + cval = 0x00; + break; + case CS6: + cval = 0x01; + break; + case CS7: + cval = 0x02; + break; + default: + case CS8: + cval = 0x03; + break; + } + + if (termios->c_cflag & CSTOPB) + cval |= 0x04; + if (termios->c_cflag & PARENB) + cval |= UART_LCR_PARITY; + if (!(termios->c_cflag & PARODD)) + cval |= UART_LCR_EPAR; +#ifdef CMSPAR + if (termios->c_cflag & CMSPAR) + cval |= UART_LCR_SPAR; +#endif + + /* + * Ask the core to calculate the divisor for us. + */ + baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); + quot = serial8250_get_divisor(port, baud); + quot = 0x35; /* FIXME */ + + /* + * Work around a bug in the Oxford Semiconductor 952 rev B + * chip which causes it to seriously miscalculate baud rates + * when DLL is 0. + */ + if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 && + up->rev == 0x5201) + quot ++; + + if (uart_config[up->port.type].flags & UART_USE_FIFO) { + if (baud < 2400) + fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIGGER_1; + else + fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIGGER_8; + } + + /* + * 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 = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; + if (termios->c_iflag & INPCK) + up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; + if (termios->c_iflag & (BRKINT | PARMRK)) + up->port.read_status_mask |= UART_LSR_BI; + + /* + * Characteres to ignore + */ + up->port.ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; + if (termios->c_iflag & IGNBRK) { + up->port.ignore_status_mask |= UART_LSR_BI; + /* + * 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 |= UART_LSR_OE; + } + + /* + * ignore all characters if CREAD is not set + */ + if ((termios->c_cflag & CREAD) == 0) + up->port.ignore_status_mask |= UART_LSR_DR; + + /* + * CTS flow control flag and modem status interrupts + */ + up->ier &= ~UART_IER_MSI; + if (UART_ENABLE_MS(&up->port, termios->c_cflag)) + up->ier |= UART_IER_MSI; + + serial_out(up, UART_IER, up->ier); + serial_outp(up, 0x28, quot & 0xffff); + up->lcr = cval; /* Save LCR */ + if (up->port.type != PORT_16750) { + if (fcr & UART_FCR_ENABLE_FIFO) { + /* emulated UARTs (Lucent Venus 167x) need two steps */ + serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); + } + serial_outp(up, UART_FCR, fcr); /* set fcr */ + } + spin_unlock_irqrestore(&up->port.lock, flags); +} + +static void +serial8250_pm(struct uart_port *port, unsigned int state, + unsigned int oldstate) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + if (state) { + /* sleep */ + if (up->pm) + up->pm(port, state, oldstate); + } else { + /* wake */ + if (up->pm) + up->pm(port, state, oldstate); + } +} + +/* + * Resource handling. This is complicated by the fact that resources + * depend on the port type. Maybe we should be claiming the standard + * 8250 ports, and then trying to get other resources as necessary? + */ +static int +serial8250_request_std_resource(struct uart_8250_port *up, struct resource **res) +{ + unsigned int size = 8 << up->port.regshift; + int ret = 0; + + switch (up->port.iotype) { + case SERIAL_IO_MEM: + if (up->port.mapbase) { + *res = request_mem_region(up->port.mapbase, size, "serial"); + if (!*res) + ret = -EBUSY; + } + break; + + case SERIAL_IO_HUB6: + case SERIAL_IO_PORT: + *res = request_region(up->port.iobase, size, "serial"); + if (!*res) + ret = -EBUSY; + break; + } + return ret; +} + + +static void serial8250_release_port(struct uart_port *port) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + unsigned long start, offset = 0, size = 0; + + size <<= up->port.regshift; + + switch (up->port.iotype) { + case SERIAL_IO_MEM: + if (up->port.mapbase) { + /* + * Unmap the area. + */ + iounmap(up->port.membase); + up->port.membase = NULL; + + start = up->port.mapbase; + + if (size) + release_mem_region(start + offset, size); + release_mem_region(start, 8 << up->port.regshift); + } + break; + + case SERIAL_IO_HUB6: + case SERIAL_IO_PORT: + start = up->port.iobase; + + if (size) + release_region(start + offset, size); + release_region(start + offset, 8 << up->port.regshift); + break; + + default: + break; + } +} + +static int serial8250_request_port(struct uart_port *port) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + struct resource *res = NULL, *res_rsa = NULL; + int ret = 0; + + if (up->port.flags & UPF_RESOURCES) { + ret = serial8250_request_std_resource(up, &res); + } + + /* + * If we have a mapbase, then request that as well. + */ + if (ret == 0 && up->port.flags & UPF_IOREMAP) { + int size = res->end - res->start + 1; + + up->port.membase = ioremap(up->port.mapbase, size); + if (!up->port.membase) + ret = -ENOMEM; + } + + if (ret < 0) { + if (res_rsa) + release_resource(res_rsa); + if (res) + release_resource(res); + } + return ret; +} + +static void serial8250_config_port(struct uart_port *port, int flags) +{ + struct uart_8250_port *up = (struct uart_8250_port *)port; + struct resource *res_std = NULL, *res_rsa = NULL; + int probeflags = PROBE_ANY; + + probeflags &= ~PROBE_RSA; + + if (flags & UART_CONFIG_TYPE) + autoconfig(up, probeflags); + + /* + * If the port wasn't an RSA port, release the resource. + */ + if (up->port.type != PORT_RSA && res_rsa) + release_resource(res_rsa); + + if (up->port.type == PORT_UNKNOWN && res_std) + release_resource(res_std); +} + +static int +serial8250_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + if (ser->irq >= NR_IRQS || ser->irq < 0 || + ser->baud_base < 9600 || ser->type < PORT_UNKNOWN || + ser->type > PORT_MAX_8250 || ser->type == PORT_CIRRUS || + ser->type == PORT_STARTECH) + return -EINVAL; + return 0; +} + +static const char * +serial8250_type(struct uart_port *port) +{ + int type = port->type; + + if (type >= ARRAY_SIZE(uart_config)) + type = 0; + return uart_config[type].name; +} + +static struct uart_ops serial8250_pops = { + .tx_empty = serial8250_tx_empty, + .set_mctrl = serial8250_set_mctrl, + .get_mctrl = serial8250_get_mctrl, + .stop_tx = serial8250_stop_tx, + .start_tx = serial8250_start_tx, + .stop_rx = serial8250_stop_rx, + .enable_ms = serial8250_enable_ms, + .break_ctl = serial8250_break_ctl, + .startup = serial8250_startup, + .shutdown = serial8250_shutdown, + .set_termios = serial8250_set_termios, + .pm = serial8250_pm, + .type = serial8250_type, + .release_port = serial8250_release_port, + .request_port = serial8250_request_port, + .config_port = serial8250_config_port, + .verify_port = serial8250_verify_port, +}; + +static struct uart_8250_port serial8250_ports[UART_NR]; + +static void __init serial8250_isa_init_ports(void) +{ + struct uart_8250_port *up; + static int first = 1; + int i; + + if (!first) + return; + first = 0; + + for (i = 0, up = serial8250_ports; i < ARRAY_SIZE(old_serial_port); + i++, up++) { + up->port.iobase = old_serial_port[i].port; + up->port.irq = old_serial_port[i].irq; + up->port.uartclk = get_au1x00_uart_baud_base(); + up->port.flags = old_serial_port[i].flags | + UPF_RESOURCES; + up->port.hub6 = old_serial_port[i].hub6; + up->port.membase = old_serial_port[i].iomem_base; + up->port.iotype = old_serial_port[i].io_type; + up->port.regshift = old_serial_port[i].iomem_reg_shift; + up->port.ops = &serial8250_pops; + } +} + +static void __init serial8250_register_ports(struct uart_driver *drv) +{ + int i; + + serial8250_isa_init_ports(); + + for (i = 0; i < UART_NR; i++) { + struct uart_8250_port *up = &serial8250_ports[i]; + + up->port.line = i; + up->port.ops = &serial8250_pops; + init_timer(&up->timer); + up->timer.function = serial8250_timeout; + + /* + * ALPHA_KLUDGE_MCR needs to be killed. + */ + up->mcr_mask = ~ALPHA_KLUDGE_MCR; + up->mcr_force = ALPHA_KLUDGE_MCR; + + uart_add_one_port(drv, &up->port); + } +} + +#ifdef CONFIG_SERIAL_AU1X00_CONSOLE + +#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) + +/* + * Wait for transmitter & holding register to empty + */ +static inline void wait_for_xmitr(struct uart_8250_port *up) +{ + unsigned int status, tmout = 10000; + + /* Wait up to 10ms for the character(s) to be sent. */ + do { + status = serial_in(up, UART_LSR); + + if (status & UART_LSR_BI) + up->lsr_break_flag = UART_LSR_BI; + + if (--tmout == 0) + break; + udelay(1); + } while ((status & BOTH_EMPTY) != BOTH_EMPTY); + + /* Wait up to 1s for flow control if necessary */ + if (up->port.flags & UPF_CONS_FLOW) { + tmout = 1000000; + while (--tmout && + ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) + udelay(1); + } +} + +/* + * 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 +serial8250_console_write(struct console *co, const char *s, unsigned int count) +{ + struct uart_8250_port *up = &serial8250_ports[co->index]; + unsigned int ier; + int i; + + /* + * First save the UER then disable the interrupts + */ + ier = serial_in(up, UART_IER); + serial_out(up, UART_IER, 0); + + /* + * Now, do each character + */ + for (i = 0; i < count; i++, s++) { + wait_for_xmitr(up); + + /* + * Send the character out. + * If a LF, also do CR... + */ + serial_out(up, UART_TX, *s); + if (*s == 10) { + wait_for_xmitr(up); + serial_out(up, UART_TX, 13); + } + } + + /* + * Finally, wait for transmitter to become empty + * and restore the IER + */ + wait_for_xmitr(up); + serial_out(up, UART_IER, ier); +} + +static int __init serial8250_console_setup(struct console *co, char *options) +{ + struct uart_port *port; + 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; + port = &serial8250_ports[co->index].port; + + /* + * Temporary fix. + */ + spin_lock_init(&port->lock); + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + return uart_set_options(port, co, baud, parity, bits, flow); +} + +extern struct uart_driver serial8250_reg; +static struct console serial8250_console = { + .name = "ttyS", + .write = serial8250_console_write, + .device = uart_console_device, + .setup = serial8250_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &serial8250_reg, +}; + +static int __init serial8250_console_init(void) +{ + serial8250_isa_init_ports(); + register_console(&serial8250_console); + return 0; +} +console_initcall(serial8250_console_init); + +#define SERIAL8250_CONSOLE &serial8250_console +#else +#define SERIAL8250_CONSOLE NULL +#endif + +static struct uart_driver serial8250_reg = { + .owner = THIS_MODULE, + .driver_name = "serial", + .devfs_name = "tts/", + .dev_name = "ttyS", + .major = TTY_MAJOR, + .minor = 64, + .nr = UART_NR, + .cons = SERIAL8250_CONSOLE, +}; + +/* + * register_serial and unregister_serial allows for 16x50 serial ports to be + * configured at run-time, to support PCMCIA modems. + */ + +static int __register_serial(struct serial_struct *req, int line) +{ + struct uart_port port; + + port.iobase = req->port; + port.membase = req->iomem_base; + port.irq = req->irq; + port.uartclk = req->baud_base * 16; + port.fifosize = req->xmit_fifo_size; + port.regshift = req->iomem_reg_shift; + port.iotype = req->io_type; + port.flags = req->flags | UPF_BOOT_AUTOCONF; + port.mapbase = req->iomap_base; + port.line = line; + + if (HIGH_BITS_OFFSET) + port.iobase |= (long) req->port_high << HIGH_BITS_OFFSET; + + /* + * If a clock rate wasn't specified by the low level + * driver, then default to the standard clock rate. + */ + if (port.uartclk == 0) + port.uartclk = BASE_BAUD * 16; + + return uart_register_port(&serial8250_reg, &port); +} + +/** + * register_serial - configure a 16x50 serial port at runtime + * @req: request structure + * + * Configure the serial port specified by the request. If the + * port exists and is in use an error is returned. If the port + * is not currently in the table it is added. + * + * 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. + */ +int register_serial(struct serial_struct *req) +{ + return __register_serial(req, -1); +} + +int __init early_serial_setup(struct uart_port *port) +{ + serial8250_isa_init_ports(); + serial8250_ports[port->line].port = *port; + serial8250_ports[port->line].port.ops = &serial8250_pops; + return 0; +} + +/** + * unregister_serial - remove a 16x50 serial port at runtime + * @line: serial line number + * + * Remove one serial port. This may be called from interrupt + * context. + */ +void unregister_serial(int line) +{ + uart_unregister_port(&serial8250_reg, line); +} + +/* + * This is for ISAPNP only. + */ +void serial8250_get_irq_map(unsigned int *map) +{ + int i; + + for (i = 0; i < UART_NR; i++) { + if (serial8250_ports[i].port.type != PORT_UNKNOWN && + serial8250_ports[i].port.irq < 16) + *map |= 1 << serial8250_ports[i].port.irq; + } +} + +/** + * serial8250_suspend_port - suspend one serial port + * @line: serial line number + * @level: the level of port suspension, as per uart_suspend_port + * + * Suspend one serial port. + */ +void serial8250_suspend_port(int line) +{ + uart_suspend_port(&serial8250_reg, &serial8250_ports[line].port); +} + +/** + * serial8250_resume_port - resume one serial port + * @line: serial line number + * @level: the level of port resumption, as per uart_resume_port + * + * Resume one serial port. + */ +void serial8250_resume_port(int line) +{ + uart_resume_port(&serial8250_reg, &serial8250_ports[line].port); +} + +static int __init serial8250_init(void) +{ + int ret, i; + + printk(KERN_INFO "Serial: Au1x00 driver\n"); + + for (i = 0; i < NR_IRQS; i++) + spin_lock_init(&irq_lists[i].lock); + + ret = uart_register_driver(&serial8250_reg); + if (ret >= 0) + serial8250_register_ports(&serial8250_reg); + + return ret; +} + +static void __exit serial8250_exit(void) +{ + int i; + + for (i = 0; i < UART_NR; i++) + uart_remove_one_port(&serial8250_reg, &serial8250_ports[i].port); + + uart_unregister_driver(&serial8250_reg); +} + +module_init(serial8250_init); +module_exit(serial8250_exit); + +EXPORT_SYMBOL(register_serial); +EXPORT_SYMBOL(unregister_serial); +EXPORT_SYMBOL(serial8250_get_irq_map); +EXPORT_SYMBOL(serial8250_suspend_port); +EXPORT_SYMBOL(serial8250_resume_port); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Au1x00 serial driver\n"); diff -puN /dev/null drivers/serial/dz.c --- /dev/null Thu Apr 11 07:25:15 2002 +++ 25-akpm/drivers/serial/dz.c Thu Feb 5 14:44:19 2004 @@ -0,0 +1,827 @@ +/* + * dz.c: Serial port driver for DECStations equiped + * with the DZ chipset. + * + * Copyright (C) 1998 Olivier A. D. Lebaillif + * + * Email: olivier.lebaillif@ifrsys.com + * + * [31-AUG-98] triemer + * Changed IRQ to use Harald's dec internals interrupts.h + * removed base_addr code - moving address assignment to setup.c + * Changed name of dz_init to rs_init to be consistent with tc code + * [13-NOV-98] triemer fixed code to receive characters + * after patches by harald to irq code. + * [09-JAN-99] triemer minor fix for schedule - due to removal of timeout + * field from "current" - somewhere between 2.1.121 and 2.1.131 + Qua Jun 27 15:02:26 BRT 2001 + * [27-JUN-2001] Arnaldo Carvalho de Melo - cleanups + * + * Parts (C) 1999 David Airlie, airlied@linux.ie + * [07-SEP-99] Bugfixes + * + * [06-Jan-2002] Russell King + * Converted to new serial core + */ + +#undef DEBUG_DZ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CONSOLE_LINE (3) /* for definition of struct console */ + +#include "dz.h" + +#define DZ_INTR_DEBUG 1 + +static char *dz_name = "DECstation DZ serial driver version "; +static char *dz_version = "1.02"; + +struct dz_port { + struct uart_port port; + unsigned int cflag; +}; + +static struct dz_port dz_ports[DZ_NB_PORT]; + +#ifdef DEBUG_DZ +/* + * debugging code to send out chars via prom + */ +static void debug_console(const char *s, int count) +{ + unsigned i; + + for (i = 0; i < count; i++) { + if (*s == 10) + prom_printf("%c", 13); + prom_printf("%c", *s++); + } +} +#endif + +/* + * ------------------------------------------------------------ + * dz_in () and dz_out () + * + * These routines are used to access the registers of the DZ + * chip, hiding relocation differences between implementation. + * ------------------------------------------------------------ + */ + +static inline unsigned short dz_in(struct dz_port *dport, unsigned offset) +{ + volatile unsigned short *addr = + (volatile unsigned short *) (dport->port.membase + offset); + return *addr; +} + +static inline void dz_out(struct dz_port *dport, unsigned offset, + unsigned short value) +{ + volatile unsigned short *addr = + (volatile unsigned short *) (dport->port.membase + offset); + *addr = value; +} + +/* + * ------------------------------------------------------------ + * rs_stop () and rs_start () + * + * These routines are called before setting or resetting + * tty->stopped. They enable or disable transmitter interrupts, + * as necessary. + * ------------------------------------------------------------ + */ + +static void dz_stop_tx(struct uart_port *uport, unsigned int tty_stop) +{ + struct dz_port *dport = (struct dz_port *)uport; + unsigned short tmp, mask = 1 << dport->port.line; + unsigned long flags; + + spin_lock_irqsave(&dport->port.lock, flags); + tmp = dz_in(dport, DZ_TCR); /* read the TX flag */ + tmp &= ~mask; /* clear the TX flag */ + dz_out(dport, DZ_TCR, tmp); + spin_unlock_irqrestore(&dport->port.lock, flags); +} + +static void dz_start_tx(struct uart_port *uport, unsigned int tty_start) +{ + struct dz_port *dport = (struct dz_port *)uport; + unsigned short tmp, mask = 1 << dport->port.line; + unsigned long flags; + + spin_lock_irqsave(&dport->port.lock, flags); + tmp = dz_in(dport, DZ_TCR); /* read the TX flag */ + tmp |= mask; /* set the TX flag */ + dz_out(dport, DZ_TCR, tmp); + spin_unlock_irqrestore(&dport->port.lock, flags); +} + +static void dz_stop_rx(struct uart_port *uport) +{ + struct dz_port *dport = (struct dz_port *)uport; + unsigned long flags; + + spin_lock_irqsave(&dport->port.lock, flags); + dport->cflag &= ~DZ_CREAD; + dz_out(dport, DZ_LPR, dport->cflag); + spin_unlock_irqrestore(&dport->port.lock, flags); +} + +static void dz_enable_ms(struct uart_port *port) +{ + /* nothing to do */ +} + +/* + * ------------------------------------------------------------ + * Here starts the interrupt handling routines. All of the + * following subroutines are declared as inline and are folded + * into dz_interrupt. They were separated out for readability's + * sake. + * + * Note: rs_interrupt() is a "fast" interrupt, which means that it + * runs with interrupts turned off. People who may want to modify + * rs_interrupt() should try to keep the interrupt handler as fast as + * possible. After you are done making modifications, it is not a bad + * idea to do: + * + * make drivers/serial/dz.s + * + * and look at the resulting assemble code in dz.s. + * + * ------------------------------------------------------------ + */ + +/* + * ------------------------------------------------------------ + * receive_char () + * + * This routine deals with inputs from any lines. + * ------------------------------------------------------------ + */ +static inline void dz_receive_chars(struct dz_port *dport) +{ + struct tty_struct *tty = NULL; + struct uart_icount *icount; + int ignore = 0; + unsigned short status, tmp; + unsigned char ch; + + /* this code is going to be a problem... + the call to tty_flip_buffer is going to need + to be rethought... + */ + do { + status = dz_in(dport, DZ_RBUF); + + /* punt so we don't get duplicate characters */ + if (!(status & DZ_DVAL)) + goto ignore_char; + + + ch = UCHAR(status); /* grab the char */ + +#if 0 + if (info->is_console) { + if (ch == 0) + return; /* it's a break ... */ + } +#endif + + tty = dport->port.info->tty;/* now tty points to the proper dev */ + icount = &dport->port.icount; + + if (!tty) + break; + if (tty->flip.count >= TTY_FLIPBUF_SIZE) + break; + + *tty->flip.char_buf_ptr = ch; + *tty->flip.flag_buf_ptr = 0; + icount->rx++; + + /* keep track of the statistics */ + if (status & (DZ_OERR | DZ_FERR | DZ_PERR)) { + if (status & DZ_PERR) /* parity error */ + icount->parity++; + else if (status & DZ_FERR) /* frame error */ + icount->frame++; + if (status & DZ_OERR) /* overrun error */ + icount->overrun++; + + /* check to see if we should ignore the character + and mask off conditions that should be ignored + */ + + if (status & dport->port.ignore_status_mask) { + if (++ignore > 100) + break; + goto ignore_char; + } + /* mask off the error conditions we want to ignore */ + tmp = status & dport->port.read_status_mask; + + if (tmp & DZ_PERR) { + *tty->flip.flag_buf_ptr = TTY_PARITY; +#ifdef DEBUG_DZ + debug_console("PERR\n", 5); +#endif + } else if (tmp & DZ_FERR) { + *tty->flip.flag_buf_ptr = TTY_FRAME; +#ifdef DEBUG_DZ + debug_console("FERR\n", 5); +#endif + } + if (tmp & DZ_OERR) { +#ifdef DEBUG_DZ + debug_console("OERR\n", 5); +#endif + if (tty->flip.count < TTY_FLIPBUF_SIZE) { + tty->flip.count++; + tty->flip.flag_buf_ptr++; + tty->flip.char_buf_ptr++; + *tty->flip.flag_buf_ptr = TTY_OVERRUN; + } + } + } + tty->flip.flag_buf_ptr++; + tty->flip.char_buf_ptr++; + tty->flip.count++; + ignore_char: + } while (status & DZ_DVAL); + + if (tty) + tty_flip_buffer_push(tty); +} + +/* + * ------------------------------------------------------------ + * transmit_char () + * + * This routine deals with outputs to any lines. + * ------------------------------------------------------------ + */ +static inline void dz_transmit_chars(struct dz_port *dport) +{ + struct circ_buf *xmit = &dport->port.info->xmit; + unsigned char tmp; + + if (dport->port.x_char) { /* XON/XOFF chars */ + dz_out(dport, DZ_TDR, dport->port.x_char); + dport->port.icount.tx++; + dport->port.x_char = 0; + return; + } + /* if nothing to do or stopped or hardware stopped */ + if (uart_circ_empty(xmit) || uart_tx_stopped(&dport->port)) { + dz_stop_tx(&dport->port, 0); + return; + } + + /* + * if something to do ... (rember the dz has no output fifo so we go + * one char at a time :-< + */ + tmp = xmit->buf[xmit->tail]; + xmit->tail = (xmit->tail + 1) & (DZ_XMIT_SIZE - 1); + dz_out(dport, DZ_TDR, tmp); + dport->port.icount.tx++; + + if (uart_circ_chars_pending(xmit) < DZ_WAKEUP_CHARS) + uart_write_wakeup(&dport->port); + + /* Are we done */ + if (uart_circ_empty(xmit)) + dz_stop_tx(&dport->port, 0); +} + +/* + * ------------------------------------------------------------ + * check_modem_status () + * + * Only valid for the MODEM line duh ! + * ------------------------------------------------------------ + */ +static inline void check_modem_status(struct dz_port *dport) +{ + unsigned short status; + + /* if not ne modem line just return */ + if (dport->port.line != DZ_MODEM) + return; + + status = dz_in(dport, DZ_MSR); + + /* it's easy, since DSR2 is the only bit in the register */ + if (status) + dport->port.icount.dsr++; +} + +/* + * ------------------------------------------------------------ + * dz_interrupt () + * + * this is the main interrupt routine for the DZ chip. + * It deals with the multiple ports. + * ------------------------------------------------------------ + */ +static irqreturn_t dz_interrupt(int irq, void *dev, struct pt_regs *regs) +{ + struct dz_port *dport; + unsigned short status; + + /* get the reason why we just got an irq */ + status = dz_in((struct dz_port *)dev, DZ_CSR); + dport = &dz_ports[LINE(status)]; + + if (status & DZ_RDONE) + dz_receive_chars(dport); + + if (status & DZ_TRDY) + dz_transmit_chars(dport); + + /* FIXME: what about check modem status??? --rmk */ + + return IRQ_HANDLED; +} + +/* + * ------------------------------------------------------------------- + * Here ends the DZ interrupt routines. + * ------------------------------------------------------------------- + */ + +static unsigned int dz_get_mctrl(struct uart_port *uport) +{ + struct dz_port *dport = (struct dz_port *)uport; + unsigned int mctrl = TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; + + if (dport->port.line == DZ_MODEM) { + /* + * CHECKME: This is a guess from the other code... --rmk + */ + if (dz_in(dport, DZ_MSR) & DZ_MODEM_DSR) + mctrl &= ~TIOCM_DSR; + } + + return mctrl; +} + +static void dz_set_mctrl(struct uart_port *uport, unsigned int mctrl) +{ + struct dz_port *dport = (struct dz_port *)uport; + unsigned short tmp; + + if (dport->port.line == DZ_MODEM) { + tmp = dz_in(dport, DZ_TCR); + if (mctrl & TIOCM_DTR) + tmp &= ~DZ_MODEM_DTR; + else + tmp |= DZ_MODEM_DTR; + dz_out(dport, DZ_TCR, tmp); + } +} + +/* + * ------------------------------------------------------------------- + * startup () + * + * various initialization tasks + * ------------------------------------------------------------------- + */ +static int dz_startup(struct uart_port *uport) +{ + struct dz_port *dport = (struct dz_port *)uport; + unsigned long flags; + unsigned short tmp; + + /* The dz lines for the mouse/keyboard must be + * opened using their respective drivers. + */ + if ((dport->port.line == DZ_KEYBOARD) || + (dport->port.line == DZ_MOUSE)) + return -ENODEV; + + spin_lock_irqsave(&dport->port.lock, flags); + + /* enable the interrupt and the scanning */ + tmp = dz_in(dport, DZ_CSR); + tmp |= DZ_RIE | DZ_TIE | DZ_MSE; + dz_out(dport, DZ_CSR, tmp); + + spin_unlock_irqrestore(&dport->port.lock, flags); + + return 0; +} + +/* + * ------------------------------------------------------------------- + * shutdown () + * + * This routine will shutdown a serial port; interrupts are disabled, and + * DTR is dropped if the hangup on close termio flag is on. + * ------------------------------------------------------------------- + */ +static void dz_shutdown(struct uart_port *uport) +{ + dz_stop_tx(uport, 0); +} + +/* + * get_lsr_info - get line status register info + * + * Purpose: Let user call ioctl() to get info when the UART physically + * is emptied. On bus types like RS485, the transmitter must + * release the bus after transmitting. This must be done when + * the transmit shift register is empty, not be done when the + * transmit holding register is empty. This functionality + * allows an RS485 driver to be written in user space. + */ +static unsigned int dz_tx_empty(struct uart_port *uport) +{ + struct dz_port *dport = (struct dz_port *)uport; + unsigned short status = dz_in(dport, DZ_LPR); + + /* FIXME: this appears to be obviously broken --rmk. */ + return status ? TIOCSER_TEMT : 0; +} + +static void dz_break_ctl(struct uart_port *uport, int break_state) +{ + struct dz_port *dport = (struct dz_port *)uport; + unsigned long flags; + unsigned short tmp, mask = 1 << uport->line; + + spin_lock_irqsave(&uport->lock, flags); + tmp = dz_in(dport, DZ_TCR); + if (break_state) + tmp |= mask; + else + tmp &= ~mask; + dz_out(dport, DZ_TCR, tmp); + spin_unlock_irqrestore(&uport->lock, flags); +} + +static void dz_set_termios(struct uart_port *uport, struct termios *termios, + struct termios *old_termios) +{ + struct dz_port *dport = (struct dz_port *)uport; + unsigned long flags; + unsigned int cflag, baud; + + cflag = dport->port.line; + + switch (termios->c_cflag & CSIZE) { + case CS5: + cflag |= DZ_CS5; + break; + case CS6: + cflag |= DZ_CS6; + break; + case CS7: + cflag |= DZ_CS7; + break; + case CS8: + default: + cflag |= DZ_CS8; + } + + if (termios->c_cflag & CSTOPB) + cflag |= DZ_CSTOPB; + if (termios->c_cflag & PARENB) + cflag |= DZ_PARENB; + if (termios->c_cflag & PARODD) + cflag |= DZ_PARODD; + + baud = uart_get_baud_rate(uport, termios, old_termios, 50, 9600); + switch (baud) { + case 50: + cflag |= DZ_B50; + break; + case 75: + cflag |= DZ_B75; + break; + case 110: + cflag |= DZ_B110; + break; + case 134: + cflag |= DZ_B134; + break; + case 150: + cflag |= DZ_B150; + break; + case 300: + cflag |= DZ_B300; + break; + case 600: + cflag |= DZ_B600; + break; + case 1200: + cflag |= DZ_B1200; + break; + case 1800: + cflag |= DZ_B1800; + break; + case 2000: + cflag |= DZ_B2000; + break; + case 2400: + cflag |= DZ_B2400; + break; + case 3600: + cflag |= DZ_B3600; + break; + case 4800: + cflag |= DZ_B4800; + break; + case 7200: + cflag |= DZ_B7200; + break; + case 9600: + default: + cflag |= DZ_B9600; + } + + if (termios->c_cflag & CREAD) + cflag |= DZ_RXENAB; + + spin_lock_irqsave(&dport->port.lock, flags); + + dz_out(dport, DZ_LPR, cflag); + dport->cflag = cflag; + + /* setup accept flag */ + dport->port.read_status_mask = DZ_OERR; + if (termios->c_iflag & INPCK) + dport->port.read_status_mask |= DZ_FERR | DZ_PERR; + + /* characters to ignore */ + uport->ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + dport->port.ignore_status_mask |= DZ_FERR | DZ_PERR; + + spin_unlock_irqrestore(&dport->port.lock, flags); +} + +static const char *dz_type(struct uart_port *port) +{ + return "DZ"; +} + +static void dz_release_port(struct uart_port *port) +{ + /* nothing to do */ +} + +static int dz_request_port(struct uart_port *port) +{ + return 0; +} + +static void dz_config_port(struct uart_port *port, int flags) +{ + if (flags & UART_CONFIG_TYPE) + port->type = PORT_DZ; +} + +/* + * verify the new serial_struct (for TIOCSSERIAL). + */ +static int dz_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + int ret = 0; + if (ser->type != PORT_UNKNOWN && ser->type != PORT_DZ) + ret = -EINVAL; + if (ser->irq != port->irq) + ret = -EINVAL; + return ret; +} + +static struct uart_ops dz_ops = { + .tx_empty = dz_tx_empty, + .get_mctrl = dz_get_mctrl, + .set_mctrl = dz_set_mctrl, + .stop_tx = dz_stop_tx, + .start_tx = dz_start_tx, + .stop_rx = dz_stop_rx, + .enable_ms = dz_enable_ms, + .break_ctl = dz_break_ctl, + .startup = dz_startup, + .shutdown = dz_shutdown, + .set_termios = dz_set_termios, + .type = dz_type, + .release_port = dz_release_port, + .request_port = dz_request_port, + .config_port = dz_config_port, + .verify_port = dz_verify_port, +}; + +static void __init dz_init_ports(void) +{ + static int first = 1; + struct dz_port *dport; + unsigned long base; + int i; + + if (!first) + return; + first = 0; + + if (mips_machtype == MACH_DS23100 || + mips_machtype == MACH_DS5100) + base = (unsigned long) KN01_DZ11_BASE; + else + base = (unsigned long) KN02_DZ11_BASE; + + for (i = 0, dport = dz_ports; i < DZ_NB_PORT; i++, dport++) { + spin_lock_init(&dport->port.lock); + dport->port.membase = (char *) base; + dport->port.iotype = SERIAL_IO_PORT; + dport->port.irq = dec_interrupt[DEC_IRQ_DZ11]; + dport->port.line = i; + dport->port.fifosize = 1; + dport->port.ops = &dz_ops; + dport->port.flags = UPF_BOOT_AUTOCONF; + } +} + +static void dz_reset(struct dz_port *dport) +{ + dz_out(dport, DZ_CSR, DZ_CLR); + + while (dz_in(dport, DZ_CSR) & DZ_CLR); + /* FIXME: cpu_relax? */ + + iob(); + + /* enable scanning */ + dz_out(dport, DZ_CSR, DZ_MSE); +} + +#ifdef CONFIG_SERIAL_DZ_CONSOLE +static void dz_console_put_char(struct dz_port *dport, unsigned char ch) +{ + unsigned long flags; + int loops = 2500; + unsigned short tmp = ch; + /* this code sends stuff out to serial device - spinning its + wheels and waiting. */ + + spin_lock_irqsave(&dport->port.lock, flags); + + /* spin our wheels */ + while (((dz_in(dport, DZ_CSR) & DZ_TRDY) != DZ_TRDY) && loops--) + /* FIXME: cpu_relax, udelay? --rmk */ + ; + + /* Actually transmit the character. */ + dz_out(dport, DZ_TDR, tmp); + + spin_unlock_irqrestore(&dport->port.lock, flags); +} +/* + * ------------------------------------------------------------------- + * dz_console_print () + * + * dz_console_print is registered for printk. + * The console must be locked when we get here. + * ------------------------------------------------------------------- + */ +static void dz_console_print(struct console *cons, + const char *str, + unsigned int count) +{ + struct dz_port *dport = &dz_ports[CONSOLE_LINE]; +#ifdef DEBUG_DZ + prom_printf((char *) str); +#endif + while (count--) { + if (*str == '\n') + dz_console_put_char(dport, '\r'); + dz_console_put_char(dport, *str++); + } +} + +static int __init dz_console_setup(struct console *co, char *options) +{ + struct dz_port *dport = &dz_ports[CONSOLE_LINE]; + int baud = 9600; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + int ret; + unsigned short mask, tmp; + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + dz_reset(dport); + + ret = uart_set_options(&dport->port, co, baud, parity, bits, flow); + if (ret == 0) { + mask = 1 << dport->port.line; + tmp = dz_in(dport, DZ_TCR); /* read the TX flag */ + if (!(tmp & mask)) { + tmp |= mask; /* set the TX flag */ + dz_out(dport, DZ_TCR, tmp); + } + } + + return ret; +} + +static struct console dz_sercons = +{ + .name = "ttyS", + .write = dz_console_print, + .device = uart_console_device, + .setup = dz_console_setup, + .flags = CON_CONSDEV | CON_PRINTBUFFER, + .index = CONSOLE_LINE, +}; + +void __init dz_serial_console_init(void) +{ + dz_init_ports(); + + register_console(&dz_sercons); +} + +#define SERIAL_DZ_CONSOLE &dz_sercons +#else +#define SERIAL_DZ_CONSOLE NULL +#endif /* CONFIG_SERIAL_DZ_CONSOLE */ + +static struct uart_driver dz_reg = { + .owner = THIS_MODULE, + .driver_name = "serial", +#ifdef CONFIG_DEVFS + .dev_name = "tts/%d", +#else + .dev_name = "ttyS%d", +#endif + .major = TTY_MAJOR, + .minor = 64, + .nr = DZ_NB_PORT, + .cons = SERIAL_DZ_CONSOLE, +}; + +int __init dz_init(void) +{ + unsigned long flags; + int ret, i; + + printk("%s%s\n", dz_name, dz_version); + + dz_init_ports(); + + save_flags(flags); + cli(); + +#ifndef CONFIG_SERIAL_DZ_CONSOLE + /* reset the chip */ + dz_reset(&dz_ports[0]); +#endif + + /* order matters here... the trick is that flags + is updated... in request_irq - to immediatedly obliterate + it is unwise. */ + restore_flags(flags); + + if (request_irq(dz_ports[0].port.irq, dz_interrupt, + SA_INTERRUPT, "DZ", &dz_ports[0])) + panic("Unable to register DZ interrupt"); + + ret = uart_register_driver(&dz_reg); + if (ret != 0) + return ret; + + for (i = 0; i < DZ_NB_PORT; i++) + uart_add_one_port(&dz_reg, &dz_ports[i].port); + + return ret; +} + +MODULE_DESCRIPTION("DECstation DZ serial driver"); +MODULE_LICENSE("GPL"); diff -puN /dev/null drivers/serial/dz.h --- /dev/null Thu Apr 11 07:25:15 2002 +++ 25-akpm/drivers/serial/dz.h Thu Feb 5 14:44:19 2004 @@ -0,0 +1,118 @@ +/* + * dz.h: Serial port driver for DECStations equiped + * with the DZ chipset. + * + * Copyright (C) 1998 Olivier A. D. Lebaillif + * + * Email: olivier.lebaillif@ifrsys.com + * + */ +#ifndef DZ_SERIAL_H +#define DZ_SERIAL_H + +/* + * Definitions for the Control and Status Received. + */ +#define DZ_TRDY 0x8000 /* Transmitter empty */ +#define DZ_TIE 0x4000 /* Transmitter Interrupt Enable */ +#define DZ_RDONE 0x0080 /* Receiver data ready */ +#define DZ_RIE 0x0040 /* Receive Interrupt Enable */ +#define DZ_MSE 0x0020 /* Master Scan Enable */ +#define DZ_CLR 0x0010 /* Master reset */ +#define DZ_MAINT 0x0008 /* Loop Back Mode */ + +/* + * Definitions for the Received buffer. + */ +#define DZ_RBUF_MASK 0x00FF /* Data Mask in the Receive Buffer */ +#define DZ_LINE_MASK 0x0300 /* Line Mask in the Receive Buffer */ +#define DZ_DVAL 0x8000 /* Valid Data indicator */ +#define DZ_OERR 0x4000 /* Overrun error indicator */ +#define DZ_FERR 0x2000 /* Frame error indicator */ +#define DZ_PERR 0x1000 /* Parity error indicator */ + +#define LINE(x) (x & DZ_LINE_MASK) >> 8 /* Get the line number from the input buffer */ +#define UCHAR(x) (unsigned char)(x & DZ_RBUF_MASK) + +/* + * Definitions for the Transmit Register. + */ +#define DZ_LINE_KEYBOARD 0x0001 +#define DZ_LINE_MOUSE 0x0002 +#define DZ_LINE_MODEM 0x0004 +#define DZ_LINE_PRINTER 0x0008 + +#define DZ_MODEM_DTR 0x0400 /* DTR for the modem line (2) */ + +/* + * Definitions for the Modem Status Register. + */ +#define DZ_MODEM_DSR 0x0200 /* DSR for the modem line (2) */ + +/* + * Definitions for the Transmit Data Register. + */ +#define DZ_BRK0 0x0100 /* Break assertion for line 0 */ +#define DZ_BRK1 0x0200 /* Break assertion for line 1 */ +#define DZ_BRK2 0x0400 /* Break assertion for line 2 */ +#define DZ_BRK3 0x0800 /* Break assertion for line 3 */ + +/* + * Definitions for the Line Parameter Register. + */ +#define DZ_KEYBOARD 0x0000 /* line 0 = keyboard */ +#define DZ_MOUSE 0x0001 /* line 1 = mouse */ +#define DZ_MODEM 0x0002 /* line 2 = modem */ +#define DZ_PRINTER 0x0003 /* line 3 = printer */ + +#define DZ_CSIZE 0x0018 /* Number of bits per byte (mask) */ +#define DZ_CS5 0x0000 /* 5 bits per byte */ +#define DZ_CS6 0x0008 /* 6 bits per byte */ +#define DZ_CS7 0x0010 /* 7 bits per byte */ +#define DZ_CS8 0x0018 /* 8 bits per byte */ + +#define DZ_CSTOPB 0x0020 /* 2 stop bits instead of one */ + +#define DZ_PARENB 0x0040 /* Parity enable */ +#define DZ_PARODD 0x0080 /* Odd parity instead of even */ + +#define DZ_CBAUD 0x0E00 /* Baud Rate (mask) */ +#define DZ_B50 0x0000 +#define DZ_B75 0x0100 +#define DZ_B110 0x0200 +#define DZ_B134 0x0300 +#define DZ_B150 0x0400 +#define DZ_B300 0x0500 +#define DZ_B600 0x0600 +#define DZ_B1200 0x0700 +#define DZ_B1800 0x0800 +#define DZ_B2000 0x0900 +#define DZ_B2400 0x0A00 +#define DZ_B3600 0x0B00 +#define DZ_B4800 0x0C00 +#define DZ_B7200 0x0D00 +#define DZ_B9600 0x0E00 + +#define DZ_CREAD 0x1000 /* Enable receiver */ +#define DZ_RXENAB 0x1000 /* enable receive char */ +/* + * Addresses for the DZ registers + */ +#define DZ_CSR 0x00 /* Control and Status Register */ +#define DZ_RBUF 0x08 /* Receive Buffer */ +#define DZ_LPR 0x08 /* Line Parameters Register */ +#define DZ_TCR 0x10 /* Transmitter Control Register */ +#define DZ_MSR 0x18 /* Modem Status Register */ +#define DZ_TDR 0x18 /* Transmit Data Register */ + +#define DZ_NB_PORT 4 + +#define DZ_XMIT_SIZE 4096 /* buffer size */ +#define DZ_WAKEUP_CHARS DZ_XMIT_SIZE/4 + +#ifdef MODULE +int init_module (void) +void cleanup_module (void) +#endif + +#endif /* DZ_SERIAL_H */ diff -puN /dev/null drivers/serial/ip22zilog.c --- /dev/null Thu Apr 11 07:25:15 2002 +++ 25-akpm/drivers/serial/ip22zilog.c Thu Feb 5 14:44:19 2004 @@ -0,0 +1,1307 @@ +/* + * Driver for Zilog serial chips found on SGI workstations and + * servers. This driver could actually be made more generic. + * + * This is based on the drivers/serial/sunzilog.c code as of 2.6.0-test7 and the + * old drivers/sgi/char/sgiserial.c code which itself is based of the original + * drivers/sbus/char/zs.c code. A lot of code has been simply moved over + * directly from there but much has been rewritten. Credits therefore go out + * to David S. Miller, Eddie C. Dost, Pete Zaitcev, Ted Ts'o and Alex Buell + * for their work there. + * + * Copyright (C) 2002 Ralf Baechle (ralf@linux-mips.org) + * Copyright (C) 2002 David S. Miller (davem@redhat.com) + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#if defined(CONFIG_SERIAL_IP22_ZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + +#include + +#include "ip22zilog.h" + +int ip22serial_current_minor = 64; + +void ip22_do_break(void); + +/* + * On IP22 we need to delay after register accesses but we do not need to + * flush writes. + */ +#define ZSDELAY() udelay(5) +#define ZSDELAY_LONG() udelay(20) +#define ZS_WSYNC(channel) do { } while (0) + +#define NUM_IP22ZILOG 1 +#define NUM_CHANNELS (NUM_IP22ZILOG * 2) + +#define ZS_CLOCK 4915200 /* Zilog input clock rate. */ +#define ZS_CLOCK_DIVISOR 16 /* Divisor this driver uses. */ + +/* + * We wrap our port structure around the generic uart_port. + */ +struct uart_ip22zilog_port { + struct uart_port port; + + /* IRQ servicing chain. */ + struct uart_ip22zilog_port *next; + + /* Current values of Zilog write registers. */ + unsigned char curregs[NUM_ZSREGS]; + + unsigned int flags; +#define IP22ZILOG_FLAG_IS_CONS 0x00000004 +#define IP22ZILOG_FLAG_IS_KGDB 0x00000008 +#define IP22ZILOG_FLAG_MODEM_STATUS 0x00000010 +#define IP22ZILOG_FLAG_IS_CHANNEL_A 0x00000020 +#define IP22ZILOG_FLAG_REGS_HELD 0x00000040 +#define IP22ZILOG_FLAG_TX_STOPPED 0x00000080 +#define IP22ZILOG_FLAG_TX_ACTIVE 0x00000100 + + unsigned int cflag; + + /* L1-A keyboard break state. */ + int kbd_id; + int l1_down; + + unsigned char parity_mask; + unsigned char prev_status; +}; + +#define ZILOG_CHANNEL_FROM_PORT(PORT) ((struct zilog_channel *)((PORT)->membase)) +#define UART_ZILOG(PORT) ((struct uart_ip22zilog_port *)(PORT)) +#define IP22ZILOG_GET_CURR_REG(PORT, REGNUM) \ + (UART_ZILOG(PORT)->curregs[REGNUM]) +#define IP22ZILOG_SET_CURR_REG(PORT, REGNUM, REGVAL) \ + ((UART_ZILOG(PORT)->curregs[REGNUM]) = (REGVAL)) +#define ZS_IS_CONS(UP) ((UP)->flags & IP22ZILOG_FLAG_IS_CONS) +#define ZS_IS_KGDB(UP) ((UP)->flags & IP22ZILOG_FLAG_IS_KGDB) +#define ZS_WANTS_MODEM_STATUS(UP) ((UP)->flags & IP22ZILOG_FLAG_MODEM_STATUS) +#define ZS_IS_CHANNEL_A(UP) ((UP)->flags & IP22ZILOG_FLAG_IS_CHANNEL_A) +#define ZS_REGS_HELD(UP) ((UP)->flags & IP22ZILOG_FLAG_REGS_HELD) +#define ZS_TX_STOPPED(UP) ((UP)->flags & IP22ZILOG_FLAG_TX_STOPPED) +#define ZS_TX_ACTIVE(UP) ((UP)->flags & IP22ZILOG_FLAG_TX_ACTIVE) + +/* Reading and writing Zilog8530 registers. The delays are to make this + * driver work on the IP22 which needs a settling delay after each chip + * register access, other machines handle this in hardware via auxiliary + * flip-flops which implement the settle time we do in software. + * + * The port lock must be held and local IRQs must be disabled + * when {read,write}_zsreg is invoked. + */ +static unsigned char read_zsreg(struct zilog_channel *channel, + unsigned char reg) +{ + unsigned char retval; + + writeb(reg, &channel->control); + ZSDELAY(); + retval = readb(&channel->control); + ZSDELAY(); + + return retval; +} + +static void write_zsreg(struct zilog_channel *channel, + unsigned char reg, unsigned char value) +{ + writeb(reg, &channel->control); + ZSDELAY(); + writeb(value, &channel->control); + ZSDELAY(); +} + +static void ip22zilog_clear_fifo(struct zilog_channel *channel) +{ + int i; + + for (i = 0; i < 32; i++) { + unsigned char regval; + + regval = readb(&channel->control); + ZSDELAY(); + if (regval & Rx_CH_AV) + break; + + regval = read_zsreg(channel, R1); + readb(&channel->data); + ZSDELAY(); + + if (regval & (PAR_ERR | Rx_OVR | CRC_ERR)) { + writeb(ERR_RES, &channel->control); + ZSDELAY(); + ZS_WSYNC(channel); + } + } +} + +/* This function must only be called when the TX is not busy. The UART + * port lock must be held and local interrupts disabled. + */ +static void __load_zsregs(struct zilog_channel *channel, unsigned char *regs) +{ + int i; + + /* Let pending transmits finish. */ + for (i = 0; i < 1000; i++) { + unsigned char stat = read_zsreg(channel, R1); + if (stat & ALL_SNT) + break; + udelay(100); + } + + writeb(ERR_RES, &channel->control); + ZSDELAY(); + ZS_WSYNC(channel); + + ip22zilog_clear_fifo(channel); + + /* Disable all interrupts. */ + write_zsreg(channel, R1, + regs[R1] & ~(RxINT_MASK | TxINT_ENAB | EXT_INT_ENAB)); + + /* Set parity, sync config, stop bits, and clock divisor. */ + write_zsreg(channel, R4, regs[R4]); + + /* Set misc. TX/RX control bits. */ + write_zsreg(channel, R10, regs[R10]); + + /* Set TX/RX controls sans the enable bits. */ + write_zsreg(channel, R3, regs[R3] & ~RxENAB); + write_zsreg(channel, R5, regs[R5] & ~TxENAB); + + /* Synchronous mode config. */ + write_zsreg(channel, R6, regs[R6]); + write_zsreg(channel, R7, regs[R7]); + + /* Don't mess with the interrupt vector (R2, unused by us) and + * master interrupt control (R9). We make sure this is setup + * properly at probe time then never touch it again. + */ + + /* Disable baud generator. */ + write_zsreg(channel, R14, regs[R14] & ~BRENAB); + + /* Clock mode control. */ + write_zsreg(channel, R11, regs[R11]); + + /* Lower and upper byte of baud rate generator divisor. */ + write_zsreg(channel, R12, regs[R12]); + write_zsreg(channel, R13, regs[R13]); + + /* Now rewrite R14, with BRENAB (if set). */ + write_zsreg(channel, R14, regs[R14]); + + /* External status interrupt control. */ + write_zsreg(channel, R15, regs[R15]); + + /* Reset external status interrupts. */ + write_zsreg(channel, R0, RES_EXT_INT); + write_zsreg(channel, R0, RES_EXT_INT); + + /* Rewrite R3/R5, this time without enables masked. */ + write_zsreg(channel, R3, regs[R3]); + write_zsreg(channel, R5, regs[R5]); + + /* Rewrite R1, this time without IRQ enabled masked. */ + write_zsreg(channel, R1, regs[R1]); +} + +/* Reprogram the Zilog channel HW registers with the copies found in the + * software state struct. If the transmitter is busy, we defer this update + * until the next TX complete interrupt. Else, we do it right now. + * + * The UART port lock must be held and local interrupts disabled. + */ +static void ip22zilog_maybe_update_regs(struct uart_ip22zilog_port *up, + struct zilog_channel *channel) +{ + if (!ZS_REGS_HELD(up)) { + if (ZS_TX_ACTIVE(up)) { + up->flags |= IP22ZILOG_FLAG_REGS_HELD; + } else { + __load_zsregs(channel, up->curregs); + } + } +} + +static void ip22zilog_receive_chars(struct uart_ip22zilog_port *up, + struct zilog_channel *channel, + struct pt_regs *regs) +{ + struct tty_struct *tty = up->port.info->tty; /* XXX info==NULL? */ + + while (1) { + unsigned char ch, r1; + + if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) { + tty->flip.work.func((void *)tty); + if (tty->flip.count >= TTY_FLIPBUF_SIZE) + return; /* XXX Ignores SysRq when we need it most. Fix. */ + } + + r1 = read_zsreg(channel, R1); + if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { + writeb(ERR_RES, &channel->control); + ZSDELAY(); + ZS_WSYNC(channel); + } + + ch = readb(&channel->control); + ZSDELAY(); + + /* This funny hack depends upon BRK_ABRT not interfering + * with the other bits we care about in R1. + */ + if (ch & BRK_ABRT) + r1 |= BRK_ABRT; + + ch = readb(&channel->data); + ZSDELAY(); + + ch &= up->parity_mask; + + if (ZS_IS_CONS(up) && (r1 & BRK_ABRT)) { + /* Wait for BREAK to deassert to avoid potentially + * confusing the PROM. + */ + while (1) { + ch = readb(&channel->control); + ZSDELAY(); + if (!(ch & BRK_ABRT)) + break; + } + ip22_do_break(); + return; + } + + /* A real serial line, record the character and status. */ + *tty->flip.char_buf_ptr = ch; + *tty->flip.flag_buf_ptr = TTY_NORMAL; + up->port.icount.rx++; + if (r1 & (BRK_ABRT | PAR_ERR | Rx_OVR | CRC_ERR)) { + if (r1 & BRK_ABRT) { + r1 &= ~(PAR_ERR | CRC_ERR); + up->port.icount.brk++; + if (uart_handle_break(&up->port)) + goto next_char; + } + else if (r1 & PAR_ERR) + up->port.icount.parity++; + else if (r1 & CRC_ERR) + up->port.icount.frame++; + if (r1 & Rx_OVR) + up->port.icount.overrun++; + r1 &= up->port.read_status_mask; + if (r1 & BRK_ABRT) + *tty->flip.flag_buf_ptr = TTY_BREAK; + else if (r1 & PAR_ERR) + *tty->flip.flag_buf_ptr = TTY_PARITY; + else if (r1 & CRC_ERR) + *tty->flip.flag_buf_ptr = TTY_FRAME; + } + if (uart_handle_sysrq_char(&up->port, ch, regs)) + goto next_char; + + if (up->port.ignore_status_mask == 0xff || + (r1 & up->port.ignore_status_mask) == 0) { + tty->flip.flag_buf_ptr++; + tty->flip.char_buf_ptr++; + tty->flip.count++; + } + if ((r1 & Rx_OVR) && + tty->flip.count < TTY_FLIPBUF_SIZE) { + *tty->flip.flag_buf_ptr = TTY_OVERRUN; + tty->flip.flag_buf_ptr++; + tty->flip.char_buf_ptr++; + tty->flip.count++; + } + next_char: + ch = readb(&channel->control); + ZSDELAY(); + if (!(ch & Rx_CH_AV)) + break; + } + + tty_flip_buffer_push(tty); +} + +static void ip22zilog_status_handle(struct uart_ip22zilog_port *up, + struct zilog_channel *channel, + struct pt_regs *regs) +{ + unsigned char status; + + status = readb(&channel->control); + ZSDELAY(); + + writeb(RES_EXT_INT, &channel->control); + ZSDELAY(); + ZS_WSYNC(channel); + + if (ZS_WANTS_MODEM_STATUS(up)) { + if (status & SYNC) + up->port.icount.dsr++; + + /* The Zilog just gives us an interrupt when DCD/CTS/etc. change. + * But it does not tell us which bit has changed, we have to keep + * track of this ourselves. + */ + if ((status & DCD) ^ up->prev_status) + uart_handle_dcd_change(&up->port, + (status & DCD)); + if ((status & CTS) ^ up->prev_status) + uart_handle_cts_change(&up->port, + (status & CTS)); + + wake_up_interruptible(&up->port.info->delta_msr_wait); + } + + up->prev_status = status; +} + +static void ip22zilog_transmit_chars(struct uart_ip22zilog_port *up, + struct zilog_channel *channel) +{ + struct circ_buf *xmit; + + if (ZS_IS_CONS(up)) { + unsigned char status = readb(&channel->control); + ZSDELAY(); + + /* TX still busy? Just wait for the next TX done interrupt. + * + * It can occur because of how we do serial console writes. It would + * be nice to transmit console writes just like we normally would for + * a TTY line. (ie. buffered and TX interrupt driven). That is not + * easy because console writes cannot sleep. One solution might be + * to poll on enough port->xmit space becomming free. -DaveM + */ + if (!(status & Tx_BUF_EMP)) + return; + } + + up->flags &= ~IP22ZILOG_FLAG_TX_ACTIVE; + + if (ZS_REGS_HELD(up)) { + __load_zsregs(channel, up->curregs); + up->flags &= ~IP22ZILOG_FLAG_REGS_HELD; + } + + if (ZS_TX_STOPPED(up)) { + up->flags &= ~IP22ZILOG_FLAG_TX_STOPPED; + goto ack_tx_int; + } + + if (up->port.x_char) { + up->flags |= IP22ZILOG_FLAG_TX_ACTIVE; + writeb(up->port.x_char, &channel->data); + ZSDELAY(); + ZS_WSYNC(channel); + + up->port.icount.tx++; + up->port.x_char = 0; + return; + } + + if (up->port.info == NULL) + goto ack_tx_int; + xmit = &up->port.info->xmit; + if (uart_circ_empty(xmit)) { + uart_write_wakeup(&up->port); + goto ack_tx_int; + } + if (uart_tx_stopped(&up->port)) + goto ack_tx_int; + + up->flags |= IP22ZILOG_FLAG_TX_ACTIVE; + writeb(xmit->buf[xmit->tail], &channel->data); + ZSDELAY(); + ZS_WSYNC(channel); + + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + up->port.icount.tx++; + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(&up->port); + + return; + +ack_tx_int: + writeb(RES_Tx_P, &channel->control); + ZSDELAY(); + ZS_WSYNC(channel); +} + +static irqreturn_t ip22zilog_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct uart_ip22zilog_port *up = dev_id; + + while (up) { + struct zilog_channel *channel + = ZILOG_CHANNEL_FROM_PORT(&up->port); + unsigned char r3; + + spin_lock(&up->port.lock); + r3 = read_zsreg(channel, R3); + + /* Channel A */ + if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { + writeb(RES_H_IUS, &channel->control); + ZSDELAY(); + ZS_WSYNC(channel); + + if (r3 & CHARxIP) + ip22zilog_receive_chars(up, channel, regs); + if (r3 & CHAEXT) + ip22zilog_status_handle(up, channel, regs); + if (r3 & CHATxIP) + ip22zilog_transmit_chars(up, channel); + } + spin_unlock(&up->port.lock); + + /* Channel B */ + up = up->next; + channel = ZILOG_CHANNEL_FROM_PORT(&up->port); + + spin_lock(&up->port.lock); + if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { + writeb(RES_H_IUS, &channel->control); + ZSDELAY(); + ZS_WSYNC(channel); + + if (r3 & CHBRxIP) + ip22zilog_receive_chars(up, channel, regs); + if (r3 & CHBEXT) + ip22zilog_status_handle(up, channel, regs); + if (r3 & CHBTxIP) + ip22zilog_transmit_chars(up, channel); + } + spin_unlock(&up->port.lock); + + up = up->next; + } + + return IRQ_HANDLED; +} + +/* A convenient way to quickly get R0 status. The caller must _not_ hold the + * port lock, it is acquired here. + */ +static __inline__ unsigned char ip22zilog_read_channel_status(struct uart_port *port) +{ + struct zilog_channel *channel; + unsigned long flags; + unsigned char status; + + spin_lock_irqsave(&port->lock, flags); + + channel = ZILOG_CHANNEL_FROM_PORT(port); + status = readb(&channel->control); + ZSDELAY(); + + spin_unlock_irqrestore(&port->lock, flags); + + return status; +} + +/* The port lock is not held. */ +static unsigned int ip22zilog_tx_empty(struct uart_port *port) +{ + unsigned char status; + unsigned int ret; + + status = ip22zilog_read_channel_status(port); + if (status & Tx_BUF_EMP) + ret = TIOCSER_TEMT; + else + ret = 0; + + return ret; +} + +/* The port lock is not held. */ +static unsigned int ip22zilog_get_mctrl(struct uart_port *port) +{ + unsigned char status; + unsigned int ret; + + status = ip22zilog_read_channel_status(port); + + ret = 0; + if (status & DCD) + ret |= TIOCM_CAR; + if (status & SYNC) + ret |= TIOCM_DSR; + if (status & CTS) + ret |= TIOCM_CTS; + + return ret; +} + +/* The port lock is held and interrupts are disabled. */ +static void ip22zilog_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; + struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port); + unsigned char set_bits, clear_bits; + + set_bits = clear_bits = 0; + + if (mctrl & TIOCM_RTS) + set_bits |= RTS; + else + clear_bits |= RTS; + if (mctrl & TIOCM_DTR) + set_bits |= DTR; + else + clear_bits |= DTR; + + /* NOTE: Not subject to 'transmitter active' rule. */ + up->curregs[R5] |= set_bits; + up->curregs[R5] &= ~clear_bits; + write_zsreg(channel, R5, up->curregs[R5]); +} + +/* The port lock is held and interrupts are disabled. */ +static void ip22zilog_stop_tx(struct uart_port *port, unsigned int tty_stop) +{ + struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; + + up->flags |= IP22ZILOG_FLAG_TX_STOPPED; +} + +/* The port lock is held and interrupts are disabled. */ +static void ip22zilog_start_tx(struct uart_port *port, unsigned int tty_start) +{ + struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; + struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port); + unsigned char status; + + up->flags |= IP22ZILOG_FLAG_TX_ACTIVE; + up->flags &= ~IP22ZILOG_FLAG_TX_STOPPED; + + status = readb(&channel->control); + ZSDELAY(); + + /* TX busy? Just wait for the TX done interrupt. */ + if (!(status & Tx_BUF_EMP)) + return; + + /* Send the first character to jump-start the TX done + * IRQ sending engine. + */ + if (port->x_char) { + writeb(port->x_char, &channel->data); + ZSDELAY(); + ZS_WSYNC(channel); + + port->icount.tx++; + port->x_char = 0; + } else { + struct circ_buf *xmit = &port->info->xmit; + + writeb(xmit->buf[xmit->tail], &channel->data); + ZSDELAY(); + ZS_WSYNC(channel); + + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(&up->port); + } +} + +/* The port lock is not held. */ +static void ip22zilog_stop_rx(struct uart_port *port) +{ + struct uart_ip22zilog_port *up = UART_ZILOG(port); + struct zilog_channel *channel; + unsigned long flags; + + if (ZS_IS_CONS(up)) + return; + + spin_lock_irqsave(&port->lock, flags); + + channel = ZILOG_CHANNEL_FROM_PORT(port); + + /* Disable all RX interrupts. */ + up->curregs[R1] &= ~RxINT_MASK; + ip22zilog_maybe_update_regs(up, channel); + + spin_unlock_irqrestore(&port->lock, flags); +} + +/* The port lock is not held. */ +static void ip22zilog_enable_ms(struct uart_port *port) +{ + struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; + struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port); + unsigned char new_reg; + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + + new_reg = up->curregs[R15] | (DCDIE | SYNCIE | CTSIE); + if (new_reg != up->curregs[R15]) { + up->curregs[R15] = new_reg; + + /* NOTE: Not subject to 'transmitter active' rule. */ + write_zsreg(channel, R15, up->curregs[R15]); + } + + spin_unlock_irqrestore(&port->lock, flags); +} + +/* The port lock is not held. */ +static void ip22zilog_break_ctl(struct uart_port *port, int break_state) +{ + struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; + struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port); + unsigned char set_bits, clear_bits, new_reg; + unsigned long flags; + + set_bits = clear_bits = 0; + + if (break_state) + set_bits |= SND_BRK; + else + clear_bits |= SND_BRK; + + spin_lock_irqsave(&port->lock, flags); + + new_reg = (up->curregs[R5] | set_bits) & ~clear_bits; + if (new_reg != up->curregs[R5]) { + up->curregs[R5] = new_reg; + + /* NOTE: Not subject to 'transmitter active' rule. */ + write_zsreg(channel, R5, up->curregs[R5]); + } + + spin_unlock_irqrestore(&port->lock, flags); +} + +static void __ip22zilog_startup(struct uart_ip22zilog_port *up) +{ + struct zilog_channel *channel; + + channel = ZILOG_CHANNEL_FROM_PORT(&up->port); + up->prev_status = readb(&channel->control); + + /* Enable receiver and transmitter. */ + up->curregs[R3] |= RxENAB; + up->curregs[R5] |= TxENAB; + + up->curregs[R1] |= EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; + ip22zilog_maybe_update_regs(up, channel); +} + +static int ip22zilog_startup(struct uart_port *port) +{ + struct uart_ip22zilog_port *up = UART_ZILOG(port); + unsigned long flags; + + if (ZS_IS_CONS(up)) + return 0; + + spin_lock_irqsave(&port->lock, flags); + __ip22zilog_startup(up); + spin_unlock_irqrestore(&port->lock, flags); + return 0; +} + +/* + * The test for ZS_IS_CONS is explained by the following e-mail: + ***** + * From: Russell King + * Date: Sun, 8 Dec 2002 10:18:38 +0000 + * + * On Sun, Dec 08, 2002 at 02:43:36AM -0500, Pete Zaitcev wrote: + * > I boot my 2.5 boxes using "console=ttyS0,9600" argument, + * > and I noticed that something is not right with reference + * > counting in this case. It seems that when the console + * > is open by kernel initially, this is not accounted + * > as an open, and uart_startup is not called. + * + * That is correct. We are unable to call uart_startup when the serial + * console is initialised because it may need to allocate memory (as + * request_irq does) and the memory allocators may not have been + * initialised. + * + * 1. initialise the port into a state where it can send characters in the + * console write method. + * + * 2. don't do the actual hardware shutdown in your shutdown() method (but + * do the normal software shutdown - ie, free irqs etc) + ***** + */ +static void ip22zilog_shutdown(struct uart_port *port) +{ + struct uart_ip22zilog_port *up = UART_ZILOG(port); + struct zilog_channel *channel; + unsigned long flags; + + if (ZS_IS_CONS(up)) + return; + + spin_lock_irqsave(&port->lock, flags); + + channel = ZILOG_CHANNEL_FROM_PORT(port); + + /* Disable receiver and transmitter. */ + up->curregs[R3] &= ~RxENAB; + up->curregs[R5] &= ~TxENAB; + + /* Disable all interrupts and BRK assertion. */ + up->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); + up->curregs[R5] &= ~SND_BRK; + ip22zilog_maybe_update_regs(up, channel); + + spin_unlock_irqrestore(&port->lock, flags); +} + +/* Shared by TTY driver and serial console setup. The port lock is held + * and local interrupts are disabled. + */ +static void +ip22zilog_convert_to_zs(struct uart_ip22zilog_port *up, unsigned int cflag, + unsigned int iflag, int brg) +{ + + up->curregs[R10] = NRZ; + up->curregs[R11] = TCBR | RCBR; + + /* Program BAUD and clock source. */ + up->curregs[R4] &= ~XCLK_MASK; + up->curregs[R4] |= X16CLK; + up->curregs[R12] = brg & 0xff; + up->curregs[R13] = (brg >> 8) & 0xff; + up->curregs[R14] = BRSRC | BRENAB; + + /* Character size, stop bits, and parity. */ + up->curregs[3] &= ~RxN_MASK; + up->curregs[5] &= ~TxN_MASK; + switch (cflag & CSIZE) { + case CS5: + up->curregs[3] |= Rx5; + up->curregs[5] |= Tx5; + up->parity_mask = 0x1f; + break; + case CS6: + up->curregs[3] |= Rx6; + up->curregs[5] |= Tx6; + up->parity_mask = 0x3f; + break; + case CS7: + up->curregs[3] |= Rx7; + up->curregs[5] |= Tx7; + up->parity_mask = 0x7f; + break; + case CS8: + default: + up->curregs[3] |= Rx8; + up->curregs[5] |= Tx8; + up->parity_mask = 0xff; + break; + }; + up->curregs[4] &= ~0x0c; + if (cflag & CSTOPB) + up->curregs[4] |= SB2; + else + up->curregs[4] |= SB1; + if (cflag & PARENB) + up->curregs[4] |= PAR_ENAB; + else + up->curregs[4] &= ~PAR_ENAB; + if (!(cflag & PARODD)) + up->curregs[4] |= PAR_EVEN; + else + up->curregs[4] &= ~PAR_EVEN; + + up->port.read_status_mask = Rx_OVR; + if (iflag & INPCK) + up->port.read_status_mask |= CRC_ERR | PAR_ERR; + if (iflag & (BRKINT | PARMRK)) + up->port.read_status_mask |= BRK_ABRT; + + up->port.ignore_status_mask = 0; + if (iflag & IGNPAR) + up->port.ignore_status_mask |= CRC_ERR | PAR_ERR; + if (iflag & IGNBRK) { + up->port.ignore_status_mask |= BRK_ABRT; + if (iflag & IGNPAR) + up->port.ignore_status_mask |= Rx_OVR; + } + + if ((cflag & CREAD) == 0) + up->port.ignore_status_mask = 0xff; +} + +/* The port lock is not held. */ +static void +ip22zilog_set_termios(struct uart_port *port, struct termios *termios, + struct termios *old) +{ + struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; + unsigned long flags; + int baud, brg; + + baud = uart_get_baud_rate(port, termios, old, 1200, 76800); + + spin_lock_irqsave(&up->port.lock, flags); + + brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); + + ip22zilog_convert_to_zs(up, termios->c_cflag, termios->c_iflag, brg); + + if (UART_ENABLE_MS(&up->port, termios->c_cflag)) + up->flags |= IP22ZILOG_FLAG_MODEM_STATUS; + else + up->flags &= ~IP22ZILOG_FLAG_MODEM_STATUS; + + up->cflag = termios->c_cflag; + + ip22zilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(port)); + + spin_unlock_irqrestore(&up->port.lock, flags); +} + +static const char *ip22zilog_type(struct uart_port *port) +{ + return "IP22-Zilog"; +} + +/* We do not request/release mappings of the registers here, this + * happens at early serial probe time. + */ +static void ip22zilog_release_port(struct uart_port *port) +{ +} + +static int ip22zilog_request_port(struct uart_port *port) +{ + return 0; +} + +/* These do not need to do anything interesting either. */ +static void ip22zilog_config_port(struct uart_port *port, int flags) +{ +} + +/* We do not support letting the user mess with the divisor, IRQ, etc. */ +static int ip22zilog_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + return -EINVAL; +} + +static struct uart_ops ip22zilog_pops = { + .tx_empty = ip22zilog_tx_empty, + .set_mctrl = ip22zilog_set_mctrl, + .get_mctrl = ip22zilog_get_mctrl, + .stop_tx = ip22zilog_stop_tx, + .start_tx = ip22zilog_start_tx, + .stop_rx = ip22zilog_stop_rx, + .enable_ms = ip22zilog_enable_ms, + .break_ctl = ip22zilog_break_ctl, + .startup = ip22zilog_startup, + .shutdown = ip22zilog_shutdown, + .set_termios = ip22zilog_set_termios, + .type = ip22zilog_type, + .release_port = ip22zilog_release_port, + .request_port = ip22zilog_request_port, + .config_port = ip22zilog_config_port, + .verify_port = ip22zilog_verify_port, +}; + +static struct uart_ip22zilog_port *ip22zilog_port_table; +static struct zilog_layout **ip22zilog_chip_regs; + +static struct uart_ip22zilog_port *ip22zilog_irq_chain; +static int zilog_irq = -1; + +static struct uart_driver ip22zilog_reg = { + .owner = THIS_MODULE, + .driver_name = "ttyS", + .devfs_name = "tty/", + .major = TTY_MAJOR, +}; + +static void * __init alloc_one_table(unsigned long size) +{ + void *ret; + + ret = kmalloc(size, GFP_KERNEL); + if (ret != NULL) + memset(ret, 0, size); + + return ret; +} + +static void __init ip22zilog_alloc_tables(void) +{ + ip22zilog_port_table = (struct uart_ip22zilog_port *) + alloc_one_table(NUM_CHANNELS * sizeof(struct uart_ip22zilog_port)); + ip22zilog_chip_regs = (struct zilog_layout **) + alloc_one_table(NUM_IP22ZILOG * sizeof(struct zilog_layout *)); + + if (ip22zilog_port_table == NULL || ip22zilog_chip_regs == NULL) { + panic("IP22-Zilog: Cannot allocate IP22-Zilog tables."); + } +} + +/* Get the address of the registers for IP22-Zilog instance CHIP. */ +static struct zilog_layout * __init get_zs(int chip) +{ + unsigned long base; + + if (chip < 0 || chip >= NUM_IP22ZILOG) { + panic("IP22-Zilog: Illegal chip number %d in get_zs.", chip); + } + + /* Not probe-able, hard code it. */ + base = (unsigned long) &sgioc->serport; + + zilog_irq = SGI_SERIAL_IRQ; + request_mem_region(base, 8, "IP22-Zilog"); + + return (struct zilog_layout *) base; +} + +#define ZS_PUT_CHAR_MAX_DELAY 2000 /* 10 ms */ + +#ifdef CONFIG_SERIAL_IP22_ZILOG_CONSOLE +static void ip22zilog_put_char(struct zilog_channel *channel, unsigned char ch) +{ + int loops = ZS_PUT_CHAR_MAX_DELAY; + + /* This is a timed polling loop so do not switch the explicit + * udelay with ZSDELAY as that is a NOP on some platforms. -DaveM + */ + do { + unsigned char val = readb(&channel->control); + if (val & Tx_BUF_EMP) { + ZSDELAY(); + break; + } + udelay(5); + } while (--loops); + + writeb(ch, &channel->data); + ZSDELAY(); + ZS_WSYNC(channel); +} + +static void +ip22zilog_console_write(struct console *con, const char *s, unsigned int count) +{ + struct uart_ip22zilog_port *up = &ip22zilog_port_table[con->index]; + struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(&up->port); + unsigned long flags; + int i; + + spin_lock_irqsave(&up->port.lock, flags); + for (i = 0; i < count; i++, s++) { + ip22zilog_put_char(channel, *s); + if (*s == 10) + ip22zilog_put_char(channel, 13); + } + udelay(2); + spin_unlock_irqrestore(&up->port.lock, flags); +} + +void +ip22serial_console_termios(struct console *con, char *options) +{ + int baud = 9600, bits = 8, cflag; + int parity = 'n'; + int flow = 'n'; + + if (!serial_console) + return; + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + cflag = CREAD | HUPCL | CLOCAL; + + switch (baud) { + case 150: cflag |= B150; break; + case 300: cflag |= B300; break; + case 600: cflag |= B600; break; + case 1200: cflag |= B1200; break; + case 2400: cflag |= B2400; break; + case 4800: cflag |= B4800; break; + case 9600: cflag |= B9600; break; + case 19200: cflag |= B19200; break; + case 38400: cflag |= B38400; break; + default: baud = 9600; cflag |= B9600; break; + } + + con->cflag = cflag | CS8; /* 8N1 */ +} + +static int __init ip22zilog_console_setup(struct console *con, char *options) +{ + struct uart_ip22zilog_port *up = &ip22zilog_port_table[con->index]; + unsigned long flags; + int baud, brg; + + printk("Console: ttyS%d (IP22-Zilog)\n", + (ip22zilog_reg.minor - 64) + con->index); + + /* Get firmware console settings. */ + ip22serial_console_termios(con, options); + + /* Firmware console speed is limited to 150-->38400 baud so + * this hackish cflag thing is OK. + */ + switch (con->cflag & CBAUD) { + case B150: baud = 150; break; + case B300: baud = 300; break; + case B600: baud = 600; break; + case B1200: baud = 1200; break; + case B2400: baud = 2400; break; + case B4800: baud = 4800; break; + default: case B9600: baud = 9600; break; + case B19200: baud = 19200; break; + case B38400: baud = 38400; break; + }; + + brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); + + spin_lock_irqsave(&up->port.lock, flags); + + up->curregs[R15] = BRKIE; + ip22zilog_convert_to_zs(up, con->cflag, 0, brg); + + __ip22zilog_startup(up); + + spin_unlock_irqrestore(&up->port.lock, flags); + + return 0; +} + +static struct console ip22zilog_console = { + .name = "ttyS", + .write = ip22zilog_console_write, + .device = uart_console_device, + .setup = ip22zilog_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &ip22zilog_reg, +}; +#define IP22ZILOG_CONSOLE (&ip22zilog_console) + +static int __init ip22zilog_console_init(void) +{ + int i; + + if (con_is_present()) + return 0; + + for (i = 0; i < NUM_CHANNELS; i++) { + int this_minor = ip22zilog_reg.minor + i; + + if ((this_minor - 64) == (serial_console - 1)) + break; + } + if (i == NUM_CHANNELS) + return 0; + + ip22zilog_console.index = i; + register_console(&ip22zilog_console); + return 0; +} +#else /* CONFIG_SERIAL_IP22_ZILOG_CONSOLE */ +#define IP22ZILOG_CONSOLE (NULL) +#define ip22zilog_console_init() do { } while (0) +#endif + +static void __init ip22zilog_prepare(void) +{ + struct uart_ip22zilog_port *up; + struct zilog_layout *rp; + int channel, chip; + + /* + * Temporary fix. + */ + for (channel = 0; channel < NUM_CHANNELS; channel++) + spin_lock_init(&ip22zilog_port_table[channel].port.lock); + + ip22zilog_irq_chain = up = &ip22zilog_port_table[0]; + for (channel = 0; channel < NUM_CHANNELS - 1; channel++) + up[channel].next = &up[channel + 1]; + up[channel].next = NULL; + + for (chip = 0; chip < NUM_IP22ZILOG; chip++) { + if (!ip22zilog_chip_regs[chip]) { + ip22zilog_chip_regs[chip] = rp = get_zs(chip); + + up[(chip * 2) + 0].port.membase = (char *) &rp->channelA; + up[(chip * 2) + 1].port.membase = (char *) &rp->channelB; + } + + /* Channel A */ + up[(chip * 2) + 0].port.iotype = UPIO_MEM; + up[(chip * 2) + 0].port.irq = zilog_irq; + up[(chip * 2) + 0].port.uartclk = ZS_CLOCK; + up[(chip * 2) + 0].port.fifosize = 1; + up[(chip * 2) + 0].port.ops = &ip22zilog_pops; + up[(chip * 2) + 0].port.type = PORT_IP22ZILOG; + up[(chip * 2) + 0].port.flags = 0; + up[(chip * 2) + 0].port.line = (chip * 2) + 0; + up[(chip * 2) + 0].flags |= IP22ZILOG_FLAG_IS_CHANNEL_A; + + /* Channel B */ + up[(chip * 2) + 1].port.iotype = UPIO_MEM; + up[(chip * 2) + 1].port.irq = zilog_irq; + up[(chip * 2) + 1].port.uartclk = ZS_CLOCK; + up[(chip * 2) + 1].port.fifosize = 1; + up[(chip * 2) + 1].port.ops = &ip22zilog_pops; + up[(chip * 2) + 1].port.type = PORT_IP22ZILOG; + up[(chip * 2) + 1].port.flags = 0; + up[(chip * 2) + 1].port.line = (chip * 2) + 1; + up[(chip * 2) + 1].flags |= 0; + } +} + +static void __init ip22zilog_init_hw(void) +{ + int i; + + for (i = 0; i < NUM_CHANNELS; i++) { + struct uart_ip22zilog_port *up = &ip22zilog_port_table[i]; + struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(&up->port); + unsigned long flags; + int baud, brg; + + spin_lock_irqsave(&up->port.lock, flags); + + if (ZS_IS_CHANNEL_A(up)) { + write_zsreg(channel, R9, FHWRES); + ZSDELAY_LONG(); + (void) read_zsreg(channel, R0); + } + + /* Normal serial TTY. */ + up->parity_mask = 0xff; + up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; + up->curregs[R4] = PAR_EVEN | X16CLK | SB1; + up->curregs[R3] = RxENAB | Rx8; + up->curregs[R5] = TxENAB | Tx8; + up->curregs[R9] = NV | MIE; + up->curregs[R10] = NRZ; + up->curregs[R11] = TCBR | RCBR; + baud = 9600; + brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); + up->curregs[R12] = (brg & 0xff); + up->curregs[R13] = (brg >> 8) & 0xff; + up->curregs[R14] = BRSRC | BRENAB; + __load_zsregs(channel, up->curregs); + + spin_unlock_irqrestore(&up->port.lock, flags); + } +} + +static int __init ip22zilog_ports_init(void) +{ + int ret; + + printk(KERN_INFO "Serial: IP22 Zilog driver (%d chips).\n", NUM_IP22ZILOG); + + ip22zilog_prepare(); + + if (request_irq(zilog_irq, ip22zilog_interrupt, 0, + "IP22-Zilog", ip22zilog_irq_chain)) { + panic("IP22-Zilog: Unable to register zs interrupt handler.\n"); + } + + ip22zilog_init_hw(); + + /* We can only init this once we have probed the Zilogs + * in the system. + */ + ip22zilog_reg.nr = NUM_CHANNELS; + ip22zilog_reg.cons = IP22ZILOG_CONSOLE; + + ip22zilog_reg.minor = ip22serial_current_minor; + ip22serial_current_minor += NUM_CHANNELS; + + ret = uart_register_driver(&ip22zilog_reg); + if (ret == 0) { + int i; + + for (i = 0; i < NUM_CHANNELS; i++) { + struct uart_ip22zilog_port *up = &ip22zilog_port_table[i]; + + uart_add_one_port(&ip22zilog_reg, &up->port); + } + } + + return ret; +} + +static int __init ip22zilog_init(void) +{ + /* IP22 Zilog setup is hard coded, no probing to do. */ + + ip22zilog_alloc_tables(); + + ip22zilog_ports_init(); + ip22zilog_console_init(); + + return 0; +} + +static void __exit ip22zilog_exit(void) +{ + int i; + + for (i = 0; i < NUM_CHANNELS; i++) { + struct uart_ip22zilog_port *up = &ip22zilog_port_table[i]; + + uart_remove_one_port(&ip22zilog_reg, &up->port); + } + + uart_unregister_driver(&ip22zilog_reg); +} + +module_init(ip22zilog_init); +module_exit(ip22zilog_exit); + +/* David wrote it but I'm to blame for the bugs ... */ +MODULE_AUTHOR("Ralf Baechle "); +MODULE_DESCRIPTION("SGI Zilog serial port driver"); +MODULE_LICENSE("GPL"); diff -puN /dev/null drivers/serial/ip22zilog.h --- /dev/null Thu Apr 11 07:25:15 2002 +++ 25-akpm/drivers/serial/ip22zilog.h Thu Feb 5 14:44:19 2004 @@ -0,0 +1,281 @@ +#ifndef _IP22_ZILOG_H +#define _IP22_ZILOG_H + +#include + +struct zilog_channel { +#ifdef __BIG_ENDIAN + volatile unsigned char unused0[3]; + volatile unsigned char control; + volatile unsigned char unused1[3]; + volatile unsigned char data; +#else /* __LITTLE_ENDIAN */ + volatile unsigned char control; + volatile unsigned char unused0[3]; + volatile unsigned char data; + volatile unsigned char unused1[3]; +#endif +}; + +struct zilog_layout { + struct zilog_channel channelB; + struct zilog_channel channelA; +}; + +#define NUM_ZSREGS 16 + +/* Conversion routines to/from brg time constants from/to bits + * per second. + */ +#define BRG_TO_BPS(brg, freq) ((freq) / 2 / ((brg) + 2)) +#define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2) + +/* The Zilog register set */ + +#define FLAG 0x7e + +/* Write Register 0 */ +#define R0 0 /* Register selects */ +#define R1 1 +#define R2 2 +#define R3 3 +#define R4 4 +#define R5 5 +#define R6 6 +#define R7 7 +#define R8 8 +#define R9 9 +#define R10 10 +#define R11 11 +#define R12 12 +#define R13 13 +#define R14 14 +#define R15 15 + +#define NULLCODE 0 /* Null Code */ +#define POINT_HIGH 0x8 /* Select upper half of registers */ +#define RES_EXT_INT 0x10 /* Reset Ext. Status Interrupts */ +#define SEND_ABORT 0x18 /* HDLC Abort */ +#define RES_RxINT_FC 0x20 /* Reset RxINT on First Character */ +#define RES_Tx_P 0x28 /* Reset TxINT Pending */ +#define ERR_RES 0x30 /* Error Reset */ +#define RES_H_IUS 0x38 /* Reset highest IUS */ + +#define RES_Rx_CRC 0x40 /* Reset Rx CRC Checker */ +#define RES_Tx_CRC 0x80 /* Reset Tx CRC Checker */ +#define RES_EOM_L 0xC0 /* Reset EOM latch */ + +/* Write Register 1 */ + +#define EXT_INT_ENAB 0x1 /* Ext Int Enable */ +#define TxINT_ENAB 0x2 /* Tx Int Enable */ +#define PAR_SPEC 0x4 /* Parity is special condition */ + +#define RxINT_DISAB 0 /* Rx Int Disable */ +#define RxINT_FCERR 0x8 /* Rx Int on First Character Only or Error */ +#define INT_ALL_Rx 0x10 /* Int on all Rx Characters or error */ +#define INT_ERR_Rx 0x18 /* Int on error only */ +#define RxINT_MASK 0x18 + +#define WT_RDY_RT 0x20 /* Wait/Ready on R/T */ +#define WT_FN_RDYFN 0x40 /* Wait/FN/Ready FN */ +#define WT_RDY_ENAB 0x80 /* Wait/Ready Enable */ + +/* Write Register #2 (Interrupt Vector) */ + +/* Write Register 3 */ + +#define RxENAB 0x1 /* Rx Enable */ +#define SYNC_L_INH 0x2 /* Sync Character Load Inhibit */ +#define ADD_SM 0x4 /* Address Search Mode (SDLC) */ +#define RxCRC_ENAB 0x8 /* Rx CRC Enable */ +#define ENT_HM 0x10 /* Enter Hunt Mode */ +#define AUTO_ENAB 0x20 /* Auto Enables */ +#define Rx5 0x0 /* Rx 5 Bits/Character */ +#define Rx7 0x40 /* Rx 7 Bits/Character */ +#define Rx6 0x80 /* Rx 6 Bits/Character */ +#define Rx8 0xc0 /* Rx 8 Bits/Character */ +#define RxN_MASK 0xc0 + +/* Write Register 4 */ + +#define PAR_ENAB 0x1 /* Parity Enable */ +#define PAR_EVEN 0x2 /* Parity Even/Odd* */ + +#define SYNC_ENAB 0 /* Sync Modes Enable */ +#define SB1 0x4 /* 1 stop bit/char */ +#define SB15 0x8 /* 1.5 stop bits/char */ +#define SB2 0xc /* 2 stop bits/char */ + +#define MONSYNC 0 /* 8 Bit Sync character */ +#define BISYNC 0x10 /* 16 bit sync character */ +#define SDLC 0x20 /* SDLC Mode (01111110 Sync Flag) */ +#define EXTSYNC 0x30 /* External Sync Mode */ + +#define X1CLK 0x0 /* x1 clock mode */ +#define X16CLK 0x40 /* x16 clock mode */ +#define X32CLK 0x80 /* x32 clock mode */ +#define X64CLK 0xC0 /* x64 clock mode */ +#define XCLK_MASK 0xC0 + +/* Write Register 5 */ + +#define TxCRC_ENAB 0x1 /* Tx CRC Enable */ +#define RTS 0x2 /* RTS */ +#define SDLC_CRC 0x4 /* SDLC/CRC-16 */ +#define TxENAB 0x8 /* Tx Enable */ +#define SND_BRK 0x10 /* Send Break */ +#define Tx5 0x0 /* Tx 5 bits (or less)/character */ +#define Tx7 0x20 /* Tx 7 bits/character */ +#define Tx6 0x40 /* Tx 6 bits/character */ +#define Tx8 0x60 /* Tx 8 bits/character */ +#define TxN_MASK 0x60 +#define DTR 0x80 /* DTR */ + +/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */ + +/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */ + +/* Write Register 8 (transmit buffer) */ + +/* Write Register 9 (Master interrupt control) */ +#define VIS 1 /* Vector Includes Status */ +#define NV 2 /* No Vector */ +#define DLC 4 /* Disable Lower Chain */ +#define MIE 8 /* Master Interrupt Enable */ +#define STATHI 0x10 /* Status high */ +#define NORESET 0 /* No reset on write to R9 */ +#define CHRB 0x40 /* Reset channel B */ +#define CHRA 0x80 /* Reset channel A */ +#define FHWRES 0xc0 /* Force hardware reset */ + +/* Write Register 10 (misc control bits) */ +#define BIT6 1 /* 6 bit/8bit sync */ +#define LOOPMODE 2 /* SDLC Loop mode */ +#define ABUNDER 4 /* Abort/flag on SDLC xmit underrun */ +#define MARKIDLE 8 /* Mark/flag on idle */ +#define GAOP 0x10 /* Go active on poll */ +#define NRZ 0 /* NRZ mode */ +#define NRZI 0x20 /* NRZI mode */ +#define FM1 0x40 /* FM1 (transition = 1) */ +#define FM0 0x60 /* FM0 (transition = 0) */ +#define CRCPS 0x80 /* CRC Preset I/O */ + +/* Write Register 11 (Clock Mode control) */ +#define TRxCXT 0 /* TRxC = Xtal output */ +#define TRxCTC 1 /* TRxC = Transmit clock */ +#define TRxCBR 2 /* TRxC = BR Generator Output */ +#define TRxCDP 3 /* TRxC = DPLL output */ +#define TRxCOI 4 /* TRxC O/I */ +#define TCRTxCP 0 /* Transmit clock = RTxC pin */ +#define TCTRxCP 8 /* Transmit clock = TRxC pin */ +#define TCBR 0x10 /* Transmit clock = BR Generator output */ +#define TCDPLL 0x18 /* Transmit clock = DPLL output */ +#define RCRTxCP 0 /* Receive clock = RTxC pin */ +#define RCTRxCP 0x20 /* Receive clock = TRxC pin */ +#define RCBR 0x40 /* Receive clock = BR Generator output */ +#define RCDPLL 0x60 /* Receive clock = DPLL output */ +#define RTxCX 0x80 /* RTxC Xtal/No Xtal */ + +/* Write Register 12 (lower byte of baud rate generator time constant) */ + +/* Write Register 13 (upper byte of baud rate generator time constant) */ + +/* Write Register 14 (Misc control bits) */ +#define BRENAB 1 /* Baud rate generator enable */ +#define BRSRC 2 /* Baud rate generator source */ +#define DTRREQ 4 /* DTR/Request function */ +#define AUTOECHO 8 /* Auto Echo */ +#define LOOPBAK 0x10 /* Local loopback */ +#define SEARCH 0x20 /* Enter search mode */ +#define RMC 0x40 /* Reset missing clock */ +#define DISDPLL 0x60 /* Disable DPLL */ +#define SSBR 0x80 /* Set DPLL source = BR generator */ +#define SSRTxC 0xa0 /* Set DPLL source = RTxC */ +#define SFMM 0xc0 /* Set FM mode */ +#define SNRZI 0xe0 /* Set NRZI mode */ + +/* Write Register 15 (external/status interrupt control) */ +#define ZCIE 2 /* Zero count IE */ +#define DCDIE 8 /* DCD IE */ +#define SYNCIE 0x10 /* Sync/hunt IE */ +#define CTSIE 0x20 /* CTS IE */ +#define TxUIE 0x40 /* Tx Underrun/EOM IE */ +#define BRKIE 0x80 /* Break/Abort IE */ + + +/* Read Register 0 */ +#define Rx_CH_AV 0x1 /* Rx Character Available */ +#define ZCOUNT 0x2 /* Zero count */ +#define Tx_BUF_EMP 0x4 /* Tx Buffer empty */ +#define DCD 0x8 /* DCD */ +#define SYNC 0x10 /* Sync/hunt */ +#define CTS 0x20 /* CTS */ +#define TxEOM 0x40 /* Tx underrun */ +#define BRK_ABRT 0x80 /* Break/Abort */ + +/* Read Register 1 */ +#define ALL_SNT 0x1 /* All sent */ +/* Residue Data for 8 Rx bits/char programmed */ +#define RES3 0x8 /* 0/3 */ +#define RES4 0x4 /* 0/4 */ +#define RES5 0xc /* 0/5 */ +#define RES6 0x2 /* 0/6 */ +#define RES7 0xa /* 0/7 */ +#define RES8 0x6 /* 0/8 */ +#define RES18 0xe /* 1/8 */ +#define RES28 0x0 /* 2/8 */ +/* Special Rx Condition Interrupts */ +#define PAR_ERR 0x10 /* Parity error */ +#define Rx_OVR 0x20 /* Rx Overrun Error */ +#define CRC_ERR 0x40 /* CRC/Framing Error */ +#define END_FR 0x80 /* End of Frame (SDLC) */ + +/* Read Register 2 (channel b only) - Interrupt vector */ +#define CHB_Tx_EMPTY 0x00 +#define CHB_EXT_STAT 0x02 +#define CHB_Rx_AVAIL 0x04 +#define CHB_SPECIAL 0x06 +#define CHA_Tx_EMPTY 0x08 +#define CHA_EXT_STAT 0x0a +#define CHA_Rx_AVAIL 0x0c +#define CHA_SPECIAL 0x0e +#define STATUS_MASK 0x0e + +/* Read Register 3 (interrupt pending register) ch a only */ +#define CHBEXT 0x1 /* Channel B Ext/Stat IP */ +#define CHBTxIP 0x2 /* Channel B Tx IP */ +#define CHBRxIP 0x4 /* Channel B Rx IP */ +#define CHAEXT 0x8 /* Channel A Ext/Stat IP */ +#define CHATxIP 0x10 /* Channel A Tx IP */ +#define CHARxIP 0x20 /* Channel A Rx IP */ + +/* Read Register 8 (receive data register) */ + +/* Read Register 10 (misc status bits) */ +#define ONLOOP 2 /* On loop */ +#define LOOPSEND 0x10 /* Loop sending */ +#define CLK2MIS 0x40 /* Two clocks missing */ +#define CLK1MIS 0x80 /* One clock missing */ + +/* Read Register 12 (lower byte of baud rate generator constant) */ + +/* Read Register 13 (upper byte of baud rate generator constant) */ + +/* Read Register 15 (value of WR 15) */ + +/* Misc macros */ +#define ZS_CLEARERR(channel) do { writeb(ERR_RES, &channel->control); \ + udelay(5); } while(0) + +#define ZS_CLEARSTAT(channel) do { writeb(RES_EXT_INT, &channel->control); \ + udelay(5); } while(0) + +#define ZS_CLEARFIFO(channel) do { readb(&channel->data); \ + udelay(2); \ + readb(&channel->data); \ + udelay(2); \ + readb(&channel->data); \ + udelay(2); } while(0) + +#endif /* _IP22_ZILOG_H */ diff -puN drivers/serial/Kconfig~mips-new-serial-drivers drivers/serial/Kconfig --- 25/drivers/serial/Kconfig~mips-new-serial-drivers Thu Feb 5 14:44:19 2004 +++ 25-akpm/drivers/serial/Kconfig Thu Feb 5 14:44:19 2004 @@ -256,6 +256,27 @@ config SERIAL_CLPS711X_OLD_NAME help ::: To be written ::: +config SERIAL_DZ + bool "DECstation DZ serial driver" + depends on DECSTATION + select SERIAL_CORE + help + DZ11-family serial controllers for VAXstations, including the + DC7085, M7814, and M7819. + +config SERIAL_DZ_CONSOLE + bool "Support console on DECstation DZ serial driver" + depends on SERIAL_DZ=y + select SERIAL_CORE_CONSOLE + help + If you say Y here, it will be possible to use a serial port as the + system console (the system console is the device which receives all + kernel messages and warnings and which allows logins in single user + mode). Note that the firmware uses ttyS0 as the serial console on + the Maxine and ttyS2 on the others. + + If unsure, say Y. + config SERIAL_21285 tristate "DC21285 serial port support" depends on ARM && FOOTBRIDGE @@ -422,6 +443,20 @@ config SERIAL_SUNSAB_CONSOLE on your Sparc system as the console, you can do so by answering Y to this option. +config SERIAL_IP22_ZILOG + tristate "IP22 Zilog8530 serial support" + depends on SGI_IP22 + select SERIAL_CORE + help + This driver supports the Zilog8530 serial ports found on SGI IP22 + systems. Say Y or M if you want to be able to these serial ports. + +config SERIAL_IP22_ZILOG_CONSOLE + bool "Console on IP22 Zilog8530 serial port" + depends on SERIAL_IP22_ZILOG=y + select SERIAL_CORE_CONSOLE + help + config V850E_UART bool "NEC V850E on-chip UART support" depends on V850E_MA1 || V850E_ME2 || V850E_TEG || V850E2_ANNA || V850E_AS85EP1 @@ -451,6 +486,22 @@ config SERIAL98_CONSOLE depends on SERIAL98=y select SERIAL_CORE_CONSOLE +config SERIAL_AU1X00 + bool "Enable Au1x00 UART Support" + depends on MIPS && SOC_AU1X00 + select SERIAL_CORE + help + If you have an Alchemy AU1X00 processor (MIPS based) and you want + to use serial ports, say Y. Otherwise, say N. + +config SERIAL_AU1X00_CONSOLE + bool "Enable Au1x00 serial console" + depends on SERIAL_AU1X00 + select SERIAL_CORE_CONSOLE + help + If you have an Alchemy AU1X00 processor (MIPS based) and you want + to use a console on a serial port, say Y. Otherwise, say N. + config SERIAL_CORE tristate diff -puN drivers/serial/Makefile~mips-new-serial-drivers drivers/serial/Makefile --- 25/drivers/serial/Makefile~mips-new-serial-drivers Thu Feb 5 14:44:19 2004 +++ 25-akpm/drivers/serial/Makefile Thu Feb 5 14:44:19 2004 @@ -23,6 +23,7 @@ obj-$(CONFIG_SERIAL_SA1100) += sa1100.o obj-$(CONFIG_SERIAL_UART00) += uart00.o obj-$(CONFIG_SERIAL_SUNCORE) += suncore.o obj-$(CONFIG_SERIAL_SUNZILOG) += sunzilog.o +obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o obj-$(CONFIG_SERIAL_SUNSU) += sunsu.o obj-$(CONFIG_SERIAL_SUNSAB) += sunsab.o obj-$(CONFIG_SERIAL_MUX) += mux.o @@ -32,3 +33,5 @@ obj-$(CONFIG_SERIAL_COLDFIRE) += mcfseri obj-$(CONFIG_V850E_UART) += v850e_uart.o obj-$(CONFIG_SERIAL98) += serial98.o obj-$(CONFIG_SERIAL_PMACZILOG) += pmac_zilog.o +obj-$(CONFIG_SERIAL_AU1X00) += au1x00_uart.o +obj-$(CONFIG_SERIAL_DZ) += dz.o _