From ab4382d27412e7e3e7c936e8d50d8888dfac3df8 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Thu, 13 Jan 2011 12:10:18 -0800 Subject: tty: move drivers/serial/ to drivers/tty/serial/ The serial drivers are really just tty drivers, so move them to drivers/tty/ to make things a bit neater overall. This is part of the tty/serial driver movement proceedure as proposed by Arnd Bergmann and approved by everyone involved a number of months ago. Cc: Arnd Bergmann Cc: Alan Cox Cc: Geert Uytterhoeven Cc: Rogier Wolff Cc: Michael H. Warfield Signed-off-by: Greg Kroah-Hartman --- drivers/serial/sunsu.c | 1608 ------------------------------------------------ 1 file changed, 1608 deletions(-) delete mode 100644 drivers/serial/sunsu.c (limited to 'drivers/serial/sunsu.c') diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c deleted file mode 100644 index 551ebfe3ccbb..000000000000 --- a/drivers/serial/sunsu.c +++ /dev/null @@ -1,1608 +0,0 @@ -/* - * su.c: Small serial driver for keyboard/mouse interface on sparc32/PCI - * - * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) - * Copyright (C) 1998-1999 Pete Zaitcev (zaitcev@yahoo.com) - * - * This is mainly a variation of 8250.c, credits go to authors mentioned - * therein. In fact this driver should be merged into the generic 8250.c - * infrastructure perhaps using a 8250_sparc.c module. - * - * Fixed to use tty_get_baud_rate(). - * Theodore Ts'o , 2001-Oct-12 - * - * Converted to new 2.5.x UART layer. - * David S. Miller (davem@davemloft.net), 2002-Jul-29 - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#ifdef CONFIG_SERIO -#include -#endif -#include -#include -#include -#include - -#include -#include -#include - -#if defined(CONFIG_SERIAL_SUNSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include - -#include "suncore.h" - -/* We are on a NS PC87303 clocked with 24.0 MHz, which results - * in a UART clock of 1.8462 MHz. - */ -#define SU_BASE_BAUD (1846200 / 16) - -enum su_type { SU_PORT_NONE, SU_PORT_MS, SU_PORT_KBD, SU_PORT_PORT }; -static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" }; - -/* - * 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 }, - { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO }, - { "Cirrus", 1, 0 }, - { "ST16650", 1, UART_CLEAR_FIFO | UART_STARTECH }, - { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, - { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO }, - { "Startech", 1, 0 }, - { "16C950/954", 128, UART_CLEAR_FIFO | UART_USE_FIFO }, - { "ST16654", 64, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, - { "XR16850", 128, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, - { "RSA", 2048, UART_CLEAR_FIFO | UART_USE_FIFO } -}; - -struct uart_sunsu_port { - struct uart_port port; - unsigned char acr; - unsigned char ier; - unsigned short rev; - unsigned char lcr; - unsigned int lsr_break_flag; - unsigned int cflag; - - /* Probing information. */ - enum su_type su_type; - unsigned int type_probed; /* XXX Stupid */ - unsigned long reg_size; - -#ifdef CONFIG_SERIO - struct serio serio; - int serio_open; -#endif -}; - -static unsigned int serial_in(struct uart_sunsu_port *up, int offset) -{ - offset <<= up->port.regshift; - - switch (up->port.iotype) { - case UPIO_HUB6: - outb(up->port.hub6 - 1 + offset, up->port.iobase); - return inb(up->port.iobase + 1); - - case UPIO_MEM: - return readb(up->port.membase + offset); - - default: - return inb(up->port.iobase + offset); - } -} - -static void serial_out(struct uart_sunsu_port *up, int offset, int value) -{ -#ifndef CONFIG_SPARC64 - /* - * MrCoffee has weird schematics: IRQ4 & P10(?) pins of SuperIO are - * connected with a gate then go to SlavIO. When IRQ4 goes tristated - * gate outputs a logical one. Since we use level triggered interrupts - * we have lockup and watchdog reset. We cannot mask IRQ because - * keyboard shares IRQ with us (Word has it as Bob Smelik's design). - * This problem is similar to what Alpha people suffer, see serial.c. - */ - if (offset == UART_MCR) - value |= UART_MCR_OUT2; -#endif - offset <<= up->port.regshift; - - switch (up->port.iotype) { - case UPIO_HUB6: - outb(up->port.hub6 - 1 + offset, up->port.iobase); - outb(value, up->port.iobase + 1); - break; - - case UPIO_MEM: - writeb(value, up->port.membase + offset); - break; - - default: - outb(value, up->port.iobase + offset); - } -} - -/* - * We used to support using pause I/O for certain machines. We - * haven't supported this for a while, but just in case it's badly - * needed for certain old 386 machines, I've left these #define's - * in.... - */ -#define serial_inp(up, offset) serial_in(up, offset) -#define serial_outp(up, offset, value) serial_out(up, offset, value) - - -/* - * For the 16C950 - */ -static void serial_icr_write(struct uart_sunsu_port *up, int offset, int value) -{ - serial_out(up, UART_SCR, offset); - serial_out(up, UART_ICR, value); -} - -#if 0 /* Unused currently */ -static unsigned int serial_icr_read(struct uart_sunsu_port *up, int offset) -{ - unsigned int value; - - serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD); - serial_out(up, UART_SCR, offset); - value = serial_in(up, UART_ICR); - serial_icr_write(up, UART_ACR, up->acr); - - return value; -} -#endif - -#ifdef CONFIG_SERIAL_8250_RSA -/* - * Attempts to turn on the RSA FIFO. Returns zero on failure. - * We set the port uart clock rate if we succeed. - */ -static int __enable_rsa(struct uart_sunsu_port *up) -{ - unsigned char mode; - int result; - - mode = serial_inp(up, UART_RSA_MSR); - result = mode & UART_RSA_MSR_FIFO; - - if (!result) { - serial_outp(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO); - mode = serial_inp(up, UART_RSA_MSR); - result = mode & UART_RSA_MSR_FIFO; - } - - if (result) - up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16; - - return result; -} - -static void enable_rsa(struct uart_sunsu_port *up) -{ - if (up->port.type == PORT_RSA) { - if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) { - spin_lock_irq(&up->port.lock); - __enable_rsa(up); - spin_unlock_irq(&up->port.lock); - } - if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) - serial_outp(up, UART_RSA_FRR, 0); - } -} - -/* - * Attempts to turn off the RSA FIFO. Returns zero on failure. - * It is unknown why interrupts were disabled in here. However, - * the caller is expected to preserve this behaviour by grabbing - * the spinlock before calling this function. - */ -static void disable_rsa(struct uart_sunsu_port *up) -{ - unsigned char mode; - int result; - - if (up->port.type == PORT_RSA && - up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) { - spin_lock_irq(&up->port.lock); - - mode = serial_inp(up, UART_RSA_MSR); - result = !(mode & UART_RSA_MSR_FIFO); - - if (!result) { - serial_outp(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO); - mode = serial_inp(up, UART_RSA_MSR); - result = !(mode & UART_RSA_MSR_FIFO); - } - - if (result) - up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16; - spin_unlock_irq(&up->port.lock); - } -} -#endif /* CONFIG_SERIAL_8250_RSA */ - -static inline void __stop_tx(struct uart_sunsu_port *p) -{ - if (p->ier & UART_IER_THRI) { - p->ier &= ~UART_IER_THRI; - serial_out(p, UART_IER, p->ier); - } -} - -static void sunsu_stop_tx(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - - __stop_tx(up); - - /* - * We really want to stop the transmitter from sending. - */ - if (up->port.type == PORT_16C950) { - up->acr |= UART_ACR_TXDIS; - serial_icr_write(up, UART_ACR, up->acr); - } -} - -static void sunsu_start_tx(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - - if (!(up->ier & UART_IER_THRI)) { - up->ier |= UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } - - /* - * Re-enable the transmitter if we disabled it. - */ - if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { - up->acr &= ~UART_ACR_TXDIS; - serial_icr_write(up, UART_ACR, up->acr); - } -} - -static void sunsu_stop_rx(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - - up->ier &= ~UART_IER_RLSI; - up->port.read_status_mask &= ~UART_LSR_DR; - serial_out(up, UART_IER, up->ier); -} - -static void sunsu_enable_ms(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - up->ier |= UART_IER_MSI; - serial_out(up, UART_IER, up->ier); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static struct tty_struct * -receive_chars(struct uart_sunsu_port *up, unsigned char *status) -{ - struct tty_struct *tty = up->port.state->port.tty; - unsigned char ch, flag; - int max_count = 256; - int saw_console_brk = 0; - - do { - ch = serial_inp(up, UART_RX); - flag = 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++; - if (up->port.cons != NULL && - up->port.line == up->port.cons->index) - saw_console_brk = 1; - /* - * 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; - - if (up->port.cons != NULL && - up->port.line == up->port.cons->index) { - /* Recover the break flag from console xmit */ - *status |= up->lsr_break_flag; - up->lsr_break_flag = 0; - } - - if (*status & UART_LSR_BI) { - flag = TTY_BREAK; - } else if (*status & UART_LSR_PE) - flag = TTY_PARITY; - else if (*status & UART_LSR_FE) - flag = TTY_FRAME; - } - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - if ((*status & up->port.ignore_status_mask) == 0) - tty_insert_flip_char(tty, ch, flag); - if (*status & UART_LSR_OE) - /* - * Overrun is special, since it's reported - * immediately, and doesn't affect the current - * character. - */ - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - ignore_char: - *status = serial_inp(up, UART_LSR); - } while ((*status & UART_LSR_DR) && (max_count-- > 0)); - - if (saw_console_brk) - sun_do_break(); - - return tty; -} - -static void transmit_chars(struct uart_sunsu_port *up) -{ - struct circ_buf *xmit = &up->port.state->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_tx_stopped(&up->port)) { - sunsu_stop_tx(&up->port); - return; - } - if (uart_circ_empty(xmit)) { - __stop_tx(up); - 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); - - if (uart_circ_empty(xmit)) - __stop_tx(up); -} - -static void check_modem_status(struct uart_sunsu_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.state->port.delta_msr_wait); -} - -static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id) -{ - struct uart_sunsu_port *up = dev_id; - unsigned long flags; - unsigned char status; - - spin_lock_irqsave(&up->port.lock, flags); - - do { - struct tty_struct *tty; - - status = serial_inp(up, UART_LSR); - tty = NULL; - if (status & UART_LSR_DR) - tty = receive_chars(up, &status); - check_modem_status(up); - if (status & UART_LSR_THRE) - transmit_chars(up); - - spin_unlock_irqrestore(&up->port.lock, flags); - - if (tty) - tty_flip_buffer_push(tty); - - spin_lock_irqsave(&up->port.lock, flags); - - } while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)); - - spin_unlock_irqrestore(&up->port.lock, flags); - - return IRQ_HANDLED; -} - -/* Separate interrupt handling path for keyboard/mouse ports. */ - -static void -sunsu_change_speed(struct uart_port *port, unsigned int cflag, - unsigned int iflag, unsigned int quot); - -static void sunsu_change_mouse_baud(struct uart_sunsu_port *up) -{ - unsigned int cur_cflag = up->cflag; - int quot, new_baud; - - up->cflag &= ~CBAUD; - up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); - - quot = up->port.uartclk / (16 * new_baud); - - sunsu_change_speed(&up->port, up->cflag, 0, quot); -} - -static void receive_kbd_ms_chars(struct uart_sunsu_port *up, int is_break) -{ - do { - unsigned char ch = serial_inp(up, UART_RX); - - /* Stop-A is handled by drivers/char/keyboard.c now. */ - if (up->su_type == SU_PORT_KBD) { -#ifdef CONFIG_SERIO - serio_interrupt(&up->serio, ch, 0); -#endif - } else if (up->su_type == SU_PORT_MS) { - int ret = suncore_mouse_baud_detection(ch, is_break); - - switch (ret) { - case 2: - sunsu_change_mouse_baud(up); - /* fallthru */ - case 1: - break; - - case 0: -#ifdef CONFIG_SERIO - serio_interrupt(&up->serio, ch, 0); -#endif - break; - }; - } - } while (serial_in(up, UART_LSR) & UART_LSR_DR); -} - -static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id) -{ - struct uart_sunsu_port *up = dev_id; - - if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) { - unsigned char status = serial_inp(up, UART_LSR); - - if ((status & UART_LSR_DR) || (status & UART_LSR_BI)) - receive_kbd_ms_chars(up, (status & UART_LSR_BI) != 0); - } - - return IRQ_HANDLED; -} - -static unsigned int sunsu_tx_empty(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_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 sunsu_get_mctrl(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned char status; - unsigned int ret; - - status = serial_in(up, UART_MSR); - - 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 sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_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; - - serial_out(up, UART_MCR, mcr); -} - -static void sunsu_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_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 sunsu_startup(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned long flags; - int retval; - - if (up->port.type == PORT_16C950) { - /* Wake up and initialize UART */ - up->acr = 0; - serial_outp(up, UART_LCR, 0xBF); - serial_outp(up, UART_EFR, UART_EFR_ECB); - serial_outp(up, UART_IER, 0); - serial_outp(up, UART_LCR, 0); - serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ - serial_outp(up, UART_LCR, 0xBF); - serial_outp(up, UART_EFR, UART_EFR_ECB); - serial_outp(up, UART_LCR, 0); - } - -#ifdef CONFIG_SERIAL_8250_RSA - /* - * If this is an RSA port, see if we can kick it up to the - * higher speed clock. - */ - enable_rsa(up); -#endif - - /* - * Clear the FIFO buffers and disable them. - * (they will be reenabled 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; - } - - if (up->su_type != SU_PORT_PORT) { - retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt, - IRQF_SHARED, su_typev[up->su_type], up); - } else { - retval = request_irq(up->port.irq, sunsu_serial_interrupt, - IRQF_SHARED, su_typev[up->su_type], up); - } - if (retval) { - printk("su: Cannot register IRQ %d\n", up->port.irq); - return retval; - } - - /* - * Now, initialize the UART - */ - serial_outp(up, UART_LCR, UART_LCR_WLEN8); - - spin_lock_irqsave(&up->port.lock, flags); - - up->port.mctrl |= TIOCM_OUT2; - - sunsu_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 sunsu_shutdown(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_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; - - sunsu_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); - -#ifdef CONFIG_SERIAL_8250_RSA - /* - * Reset the RSA board back to 115kbps compat mode. - */ - disable_rsa(up); -#endif - - /* - * Read data port to reset things. - */ - (void) serial_in(up, UART_RX); - - free_irq(up->port.irq, up); -} - -static void -sunsu_change_speed(struct uart_port *port, unsigned int cflag, - unsigned int iflag, unsigned int quot) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned char cval, fcr = 0; - unsigned long flags; - - switch (cflag & CSIZE) { - case CS5: - cval = 0x00; - break; - case CS6: - cval = 0x01; - break; - case CS7: - cval = 0x02; - break; - default: - case CS8: - cval = 0x03; - break; - } - - if (cflag & CSTOPB) - cval |= 0x04; - if (cflag & PARENB) - cval |= UART_LCR_PARITY; - if (!(cflag & PARODD)) - cval |= UART_LCR_EPAR; -#ifdef CMSPAR - if (cflag & CMSPAR) - cval |= UART_LCR_SPAR; -#endif - - /* - * 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 ((up->port.uartclk / quot) < (2400 * 16)) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1; -#ifdef CONFIG_SERIAL_8250_RSA - else if (up->port.type == PORT_RSA) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14; -#endif - else - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8; - } - if (up->port.type == PORT_16750) - fcr |= UART_FCR7_64BYTE; - - /* - * 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, cflag, (port->uartclk / (16 * quot))); - - up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; - if (iflag & INPCK) - up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= UART_LSR_BI; - - /* - * Characteres to ignore - */ - up->port.ignore_status_mask = 0; - if (iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; - if (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 (iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_OE; - } - - /* - * ignore all characters if CREAD is not set - */ - if ((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, cflag)) - up->ier |= UART_IER_MSI; - - serial_out(up, UART_IER, up->ier); - - if (uart_config[up->port.type].flags & UART_STARTECH) { - serial_outp(up, UART_LCR, 0xBF); - serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0); - } - serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */ - serial_outp(up, UART_DLL, quot & 0xff); /* LS of divisor */ - serial_outp(up, UART_DLM, quot >> 8); /* MS of divisor */ - if (up->port.type == PORT_16750) - serial_outp(up, UART_FCR, fcr); /* set fcr */ - serial_outp(up, UART_LCR, cval); /* reset DLAB */ - 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 */ - } - - up->cflag = cflag; - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static void -sunsu_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned int baud, quot; - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot); -} - -static void sunsu_release_port(struct uart_port *port) -{ -} - -static int sunsu_request_port(struct uart_port *port) -{ - return 0; -} - -static void sunsu_config_port(struct uart_port *port, int flags) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - - if (flags & UART_CONFIG_TYPE) { - /* - * We are supposed to call autoconfig here, but this requires - * splitting all the OBP probing crap from the UART probing. - * We'll do it when we kill sunsu.c altogether. - */ - port->type = up->type_probed; /* XXX */ - } -} - -static int -sunsu_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return -EINVAL; -} - -static const char * -sunsu_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 sunsu_pops = { - .tx_empty = sunsu_tx_empty, - .set_mctrl = sunsu_set_mctrl, - .get_mctrl = sunsu_get_mctrl, - .stop_tx = sunsu_stop_tx, - .start_tx = sunsu_start_tx, - .stop_rx = sunsu_stop_rx, - .enable_ms = sunsu_enable_ms, - .break_ctl = sunsu_break_ctl, - .startup = sunsu_startup, - .shutdown = sunsu_shutdown, - .set_termios = sunsu_set_termios, - .type = sunsu_type, - .release_port = sunsu_release_port, - .request_port = sunsu_request_port, - .config_port = sunsu_config_port, - .verify_port = sunsu_verify_port, -}; - -#define UART_NR 4 - -static struct uart_sunsu_port sunsu_ports[UART_NR]; - -#ifdef CONFIG_SERIO - -static DEFINE_SPINLOCK(sunsu_serio_lock); - -static int sunsu_serio_write(struct serio *serio, unsigned char ch) -{ - struct uart_sunsu_port *up = serio->port_data; - unsigned long flags; - int lsr; - - spin_lock_irqsave(&sunsu_serio_lock, flags); - - do { - lsr = serial_in(up, UART_LSR); - } while (!(lsr & UART_LSR_THRE)); - - /* Send the character out. */ - serial_out(up, UART_TX, ch); - - spin_unlock_irqrestore(&sunsu_serio_lock, flags); - - return 0; -} - -static int sunsu_serio_open(struct serio *serio) -{ - struct uart_sunsu_port *up = serio->port_data; - unsigned long flags; - int ret; - - spin_lock_irqsave(&sunsu_serio_lock, flags); - if (!up->serio_open) { - up->serio_open = 1; - ret = 0; - } else - ret = -EBUSY; - spin_unlock_irqrestore(&sunsu_serio_lock, flags); - - return ret; -} - -static void sunsu_serio_close(struct serio *serio) -{ - struct uart_sunsu_port *up = serio->port_data; - unsigned long flags; - - spin_lock_irqsave(&sunsu_serio_lock, flags); - up->serio_open = 0; - spin_unlock_irqrestore(&sunsu_serio_lock, flags); -} - -#endif /* CONFIG_SERIO */ - -static void sunsu_autoconfig(struct uart_sunsu_port *up) -{ - unsigned char status1, status2, scratch, scratch2, scratch3; - unsigned char save_lcr, save_mcr; - unsigned long flags; - - if (up->su_type == SU_PORT_NONE) - return; - - up->type_probed = PORT_UNKNOWN; - up->port.iotype = UPIO_MEM; - - spin_lock_irqsave(&up->port.lock, flags); - - if (!(up->port.flags & UPF_BUGGY_UART)) { - /* - * Do a simple existence test first; if we fail this, there's - * no point trying anything else. - * - * 0x80 is used as a nonsense port to prevent against false - * positives due to ISA bus float. The assumption is that - * 0x80 is a non-existent port; which should be safe since - * include/asm/io.h also makes this assumption. - */ - scratch = serial_inp(up, UART_IER); - serial_outp(up, UART_IER, 0); -#ifdef __i386__ - outb(0xff, 0x080); -#endif - scratch2 = serial_inp(up, UART_IER); - serial_outp(up, UART_IER, 0x0f); -#ifdef __i386__ - outb(0, 0x080); -#endif - scratch3 = serial_inp(up, UART_IER); - serial_outp(up, UART_IER, scratch); - if (scratch2 != 0 || scratch3 != 0x0F) - goto out; /* We failed; there's nothing here */ - } - - save_mcr = serial_in(up, UART_MCR); - save_lcr = serial_in(up, UART_LCR); - - /* - * Check to see if a UART is really there. Certain broken - * internal modems based on the Rockwell chipset fail this - * test, because they apparently don't implement the loopback - * test mode. So this test is skipped on the COM 1 through - * COM 4 ports. This *should* be safe, since no board - * manufacturer would be stupid enough to design a board - * that conflicts with COM 1-4 --- we hope! - */ - if (!(up->port.flags & UPF_SKIP_TEST)) { - serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A); - status1 = serial_inp(up, UART_MSR) & 0xF0; - serial_outp(up, UART_MCR, save_mcr); - if (status1 != 0x90) - goto out; /* We failed loopback test */ - } - serial_outp(up, UART_LCR, 0xBF); /* set up for StarTech test */ - serial_outp(up, UART_EFR, 0); /* EFR is the same as FCR */ - serial_outp(up, UART_LCR, 0); - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - scratch = serial_in(up, UART_IIR) >> 6; - switch (scratch) { - case 0: - up->port.type = PORT_16450; - break; - case 1: - up->port.type = PORT_UNKNOWN; - break; - case 2: - up->port.type = PORT_16550; - break; - case 3: - up->port.type = PORT_16550A; - break; - } - if (up->port.type == PORT_16550A) { - /* Check for Startech UART's */ - serial_outp(up, UART_LCR, UART_LCR_DLAB); - if (serial_in(up, UART_EFR) == 0) { - up->port.type = PORT_16650; - } else { - serial_outp(up, UART_LCR, 0xBF); - if (serial_in(up, UART_EFR) == 0) - up->port.type = PORT_16650V2; - } - } - if (up->port.type == PORT_16550A) { - /* Check for TI 16750 */ - serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB); - serial_outp(up, UART_FCR, - UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); - scratch = serial_in(up, UART_IIR) >> 5; - if (scratch == 7) { - /* - * If this is a 16750, and not a cheap UART - * clone, then it should only go into 64 byte - * mode if the UART_FCR7_64BYTE bit was set - * while UART_LCR_DLAB was latched. - */ - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_outp(up, UART_LCR, 0); - serial_outp(up, UART_FCR, - UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); - scratch = serial_in(up, UART_IIR) >> 5; - if (scratch == 6) - up->port.type = PORT_16750; - } - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - } - serial_outp(up, UART_LCR, save_lcr); - if (up->port.type == PORT_16450) { - scratch = serial_in(up, UART_SCR); - serial_outp(up, UART_SCR, 0xa5); - status1 = serial_in(up, UART_SCR); - serial_outp(up, UART_SCR, 0x5a); - status2 = serial_in(up, UART_SCR); - serial_outp(up, UART_SCR, scratch); - - if ((status1 != 0xa5) || (status2 != 0x5a)) - up->port.type = PORT_8250; - } - - up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; - - if (up->port.type == PORT_UNKNOWN) - goto out; - up->type_probed = up->port.type; /* XXX */ - - /* - * Reset the UART. - */ -#ifdef CONFIG_SERIAL_8250_RSA - if (up->port.type == PORT_RSA) - serial_outp(up, UART_RSA_FRR, 0); -#endif - 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); -} - -static struct uart_driver sunsu_reg = { - .owner = THIS_MODULE, - .driver_name = "sunsu", - .dev_name = "ttyS", - .major = TTY_MAJOR, -}; - -static int __devinit sunsu_kbd_ms_init(struct uart_sunsu_port *up) -{ - int quot, baud; -#ifdef CONFIG_SERIO - struct serio *serio; -#endif - - if (up->su_type == SU_PORT_KBD) { - up->cflag = B1200 | CS8 | CLOCAL | CREAD; - baud = 1200; - } else { - up->cflag = B4800 | CS8 | CLOCAL | CREAD; - baud = 4800; - } - quot = up->port.uartclk / (16 * baud); - - sunsu_autoconfig(up); - if (up->port.type == PORT_UNKNOWN) - return -ENODEV; - - printk("%s: %s port at %llx, irq %u\n", - up->port.dev->of_node->full_name, - (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse", - (unsigned long long) up->port.mapbase, - up->port.irq); - -#ifdef CONFIG_SERIO - serio = &up->serio; - serio->port_data = up; - - serio->id.type = SERIO_RS232; - if (up->su_type == SU_PORT_KBD) { - serio->id.proto = SERIO_SUNKBD; - strlcpy(serio->name, "sukbd", sizeof(serio->name)); - } else { - serio->id.proto = SERIO_SUN; - serio->id.extra = 1; - strlcpy(serio->name, "sums", sizeof(serio->name)); - } - strlcpy(serio->phys, - (!(up->port.line & 1) ? "su/serio0" : "su/serio1"), - sizeof(serio->phys)); - - serio->write = sunsu_serio_write; - serio->open = sunsu_serio_open; - serio->close = sunsu_serio_close; - serio->dev.parent = up->port.dev; - - serio_register_port(serio); -#endif - - sunsu_change_speed(&up->port, up->cflag, 0, quot); - - sunsu_startup(&up->port); - return 0; -} - -/* - * ------------------------------------------------------------ - * Serial console driver - * ------------------------------------------------------------ - */ - -#ifdef CONFIG_SERIAL_SUNSU_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_sunsu_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); - } -} - -static void sunsu_console_putchar(struct uart_port *port, int ch) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *)port; - - wait_for_xmitr(up); - serial_out(up, UART_TX, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - */ -static void sunsu_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_sunsu_port *up = &sunsu_ports[co->index]; - unsigned long flags; - unsigned int ier; - int locked = 1; - - local_irq_save(flags); - if (up->port.sysrq) { - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&up->port.lock); - } else - spin_lock(&up->port.lock); - - /* - * First save the UER then disable the interrupts - */ - ier = serial_in(up, UART_IER); - serial_out(up, UART_IER, 0); - - uart_console_write(&up->port, s, count, sunsu_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - serial_out(up, UART_IER, ier); - - if (locked) - spin_unlock(&up->port.lock); - local_irq_restore(flags); -} - -/* - * Setup initial baud/bits/parity. We do two things here: - * - construct a cflag setting for the first su_open() - * - initialize the serial port - * Return non-zero if we didn't find a serial port. - */ -static int __init sunsu_console_setup(struct console *co, char *options) -{ - static struct ktermios dummy; - struct ktermios termios; - struct uart_port *port; - - printk("Console: ttyS%d (SU)\n", - (sunsu_reg.minor - 64) + co->index); - - /* - * 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 = &sunsu_ports[co->index].port; - - /* - * Temporary fix. - */ - spin_lock_init(&port->lock); - - /* Get firmware console settings. */ - sunserial_console_termios(co, port->dev->of_node); - - memset(&termios, 0, sizeof(struct ktermios)); - termios.c_cflag = co->cflag; - port->mctrl |= TIOCM_DTR; - port->ops->set_termios(port, &termios, &dummy); - - return 0; -} - -static struct console sunsu_console = { - .name = "ttyS", - .write = sunsu_console_write, - .device = uart_console_device, - .setup = sunsu_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sunsu_reg, -}; - -/* - * Register console. - */ - -static inline struct console *SUNSU_CONSOLE(void) -{ - return &sunsu_console; -} -#else -#define SUNSU_CONSOLE() (NULL) -#define sunsu_serial_console_init() do { } while (0) -#endif - -static enum su_type __devinit su_get_type(struct device_node *dp) -{ - struct device_node *ap = of_find_node_by_path("/aliases"); - - if (ap) { - const char *keyb = of_get_property(ap, "keyboard", NULL); - const char *ms = of_get_property(ap, "mouse", NULL); - - if (keyb) { - if (dp == of_find_node_by_path(keyb)) - return SU_PORT_KBD; - } - if (ms) { - if (dp == of_find_node_by_path(ms)) - return SU_PORT_MS; - } - } - - return SU_PORT_PORT; -} - -static int __devinit su_probe(struct platform_device *op, const struct of_device_id *match) -{ - static int inst; - struct device_node *dp = op->dev.of_node; - struct uart_sunsu_port *up; - struct resource *rp; - enum su_type type; - bool ignore_line; - int err; - - type = su_get_type(dp); - if (type == SU_PORT_PORT) { - if (inst >= UART_NR) - return -EINVAL; - up = &sunsu_ports[inst]; - } else { - up = kzalloc(sizeof(*up), GFP_KERNEL); - if (!up) - return -ENOMEM; - } - - up->port.line = inst; - - spin_lock_init(&up->port.lock); - - up->su_type = type; - - rp = &op->resource[0]; - up->port.mapbase = rp->start; - up->reg_size = (rp->end - rp->start) + 1; - up->port.membase = of_ioremap(rp, 0, up->reg_size, "su"); - if (!up->port.membase) { - if (type != SU_PORT_PORT) - kfree(up); - return -ENOMEM; - } - - up->port.irq = op->archdata.irqs[0]; - - up->port.dev = &op->dev; - - up->port.type = PORT_UNKNOWN; - up->port.uartclk = (SU_BASE_BAUD * 16); - - err = 0; - if (up->su_type == SU_PORT_KBD || up->su_type == SU_PORT_MS) { - err = sunsu_kbd_ms_init(up); - if (err) { - of_iounmap(&op->resource[0], - up->port.membase, up->reg_size); - kfree(up); - return err; - } - dev_set_drvdata(&op->dev, up); - - return 0; - } - - up->port.flags |= UPF_BOOT_AUTOCONF; - - sunsu_autoconfig(up); - - err = -ENODEV; - if (up->port.type == PORT_UNKNOWN) - goto out_unmap; - - up->port.ops = &sunsu_pops; - - ignore_line = false; - if (!strcmp(dp->name, "rsc-console") || - !strcmp(dp->name, "lom-console")) - ignore_line = true; - - sunserial_console_match(SUNSU_CONSOLE(), dp, - &sunsu_reg, up->port.line, - ignore_line); - err = uart_add_one_port(&sunsu_reg, &up->port); - if (err) - goto out_unmap; - - dev_set_drvdata(&op->dev, up); - - inst++; - - return 0; - -out_unmap: - of_iounmap(&op->resource[0], up->port.membase, up->reg_size); - return err; -} - -static int __devexit su_remove(struct platform_device *op) -{ - struct uart_sunsu_port *up = dev_get_drvdata(&op->dev); - bool kbdms = false; - - if (up->su_type == SU_PORT_MS || - up->su_type == SU_PORT_KBD) - kbdms = true; - - if (kbdms) { -#ifdef CONFIG_SERIO - serio_unregister_port(&up->serio); -#endif - } else if (up->port.type != PORT_UNKNOWN) - uart_remove_one_port(&sunsu_reg, &up->port); - - if (up->port.membase) - of_iounmap(&op->resource[0], up->port.membase, up->reg_size); - - if (kbdms) - kfree(up); - - dev_set_drvdata(&op->dev, NULL); - - return 0; -} - -static const struct of_device_id su_match[] = { - { - .name = "su", - }, - { - .name = "su_pnp", - }, - { - .name = "serial", - .compatible = "su", - }, - { - .type = "serial", - .compatible = "su", - }, - {}, -}; -MODULE_DEVICE_TABLE(of, su_match); - -static struct of_platform_driver su_driver = { - .driver = { - .name = "su", - .owner = THIS_MODULE, - .of_match_table = su_match, - }, - .probe = su_probe, - .remove = __devexit_p(su_remove), -}; - -static int __init sunsu_init(void) -{ - struct device_node *dp; - int err; - int num_uart = 0; - - for_each_node_by_name(dp, "su") { - if (su_get_type(dp) == SU_PORT_PORT) - num_uart++; - } - for_each_node_by_name(dp, "su_pnp") { - if (su_get_type(dp) == SU_PORT_PORT) - num_uart++; - } - for_each_node_by_name(dp, "serial") { - if (of_device_is_compatible(dp, "su")) { - if (su_get_type(dp) == SU_PORT_PORT) - num_uart++; - } - } - for_each_node_by_type(dp, "serial") { - if (of_device_is_compatible(dp, "su")) { - if (su_get_type(dp) == SU_PORT_PORT) - num_uart++; - } - } - - if (num_uart) { - err = sunserial_register_minors(&sunsu_reg, num_uart); - if (err) - return err; - } - - err = of_register_platform_driver(&su_driver); - if (err && num_uart) - sunserial_unregister_minors(&sunsu_reg, num_uart); - - return err; -} - -static void __exit sunsu_exit(void) -{ - if (sunsu_reg.nr) - sunserial_unregister_minors(&sunsu_reg, sunsu_reg.nr); -} - -module_init(sunsu_init); -module_exit(sunsu_exit); - -MODULE_AUTHOR("Eddie C. Dost, Peter Zaitcev, and David S. Miller"); -MODULE_DESCRIPTION("Sun SU serial port driver"); -MODULE_VERSION("2.0"); -MODULE_LICENSE("GPL"); -- cgit v1.2.3