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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [char/] [or32serial.c] - Rev 1772
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/* 68328serial.c: Serial port driver for 68328 microcontroller * * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu> * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@rt-control.com> * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com> * */ #include <linux/module.h> #include <linux/errno.h> #include <linux/signal.h> #include <linux/sched.h> #include <linux/timer.h> #include <linux/interrupt.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial.h> #include <linux/serial_reg.h> #include <linux/config.h> #include <linux/major.h> #include <linux/string.h> #include <linux/fcntl.h> #include <linux/ptrace.h> #include <linux/ioport.h> #include <linux/mm.h> #include <asm/system.h> #include <asm/irq.h> #include <asm/io.h> #include <asm/segment.h> #include <asm/bitops.h> /* #include <linux/errno.h> #include <linux/signal.h> #include <linux/sched.h> #include <linux/timer.h> #include <linux/interrupt.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/config.h> #include <linux/major.h> #include <linux/string.h> #include <linux/fcntl.h> #include <linux/mm.h> #include <linux/kernel.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/system.h> #include <asm/segment.h> #include <asm/bitops.h> #include <asm/delay.h> */ #define NR_PORTS 1 #define SERIAL_TYPE_NORMAL 1 #define SERIAL_TYPE_CALLOUT 2 #define BASE_BAUD 115200 #define STD_COM_FLAGS 0 struct tty_driver serial_driver, callout_driver; static int serial_refcount; static struct tty_struct *serial_table[NR_PORTS]; static struct termios *serial_termios[NR_PORTS]; static struct termios *serial_termios_locked[NR_PORTS]; int rs_console_inited = 0; int rs_console_port = 0; int rs_console_baud = 115200; DECLARE_TASK_QUEUE(tq_serial); struct async_struct rs_or32_table[] = { /* UART CLK PORT IRQ FLAGS */ { 0, BASE_BAUD, 0, 0, STD_COM_FLAGS },/* ttyS0 */ }; /* * or32_console_print is registered for printk. */ void console_print_or32(const char *p) { char c; return; } void rs_console_init(void) { /* Nothig for now */ rs_console_inited++; return; } /* * rs_console_print is registered for printk output. */ void rs_console_print(const char *p) { char c; while ((c = *(p++)) != 0) { /* if(c == '\n') _print("\r"); */ _print("%c", c); } return; } /* * Setup for console. Argument comes from the boot command line. */ int rs_console_setup(char *arg) { int rc = 0; if (!strncmp(arg, "/dev/ttyS", 9)) { rs_console_port = arg[9] - '0'; arg += 10; rc = 1; } else if (!strncmp(arg, "/dev/cua", 8)) { rs_console_port = arg[8] - '0'; arg += 9; rc = 1; } if (*arg == ',') rs_console_baud = simple_strtoul(arg+1,NULL,0); return(rc); } /* * This is the serial driver's generic interrupt routine */ static void rs_or32_interrupt(int irq, void *dev_id, struct pt_regs * regs) { int status; struct async_struct * info; int pass_counter = 0; struct async_struct *end_mark = 0; int first_multi = 0; struct rs_multiport_struct *multi; printk("%s - %s:%d\n",__FILE__,__FUNCTION__,__LINE__); printk(" irq=%x info=%x\n", irq, info); info = &rs_or32_table[irq]; if (!info) return; /* queue_task_irq_off(&info->tqueue, &tq_serial);*/ queue_task_irq_off(&info->tty->flip.tqueue, &tq_serial); mark_bh(SERIAL_BH); } static void do_or32_serial_bh(void) { printk("%s - %s:%d\n",__FILE__,__FUNCTION__,__LINE__); run_task_queue(&tq_serial); } static void do_softint(void *private_) { struct async_struct *info = (struct async_struct *) private_; struct tty_struct *tty; printk("%s - %s:%d\n",__FILE__,__FUNCTION__,__LINE__); tty = info->tty; if (!tty) return; /* if (clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) { if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) (tty->ldisc.write_wakeup)(tty);*/ printk("%s - %s:%d\n",__FILE__,__FUNCTION__,__LINE__); wake_up_interruptible(&tty->write_wait); /* }*/ } static void do_serial_hangup(void *private_) { struct async_struct *info = (struct async_struct *) private_; struct tty_struct *tty; printk("%s - %s:%d\n",__FILE__,__FUNCTION__,__LINE__); tty = info->tty; if (!tty) return; tty_hangup(tty); } void init_port(struct async_struct *info, int num) { int retval; info->magic = SERIAL_MAGIC; info->line = num; #if 1 printk("%s(%d): info=%x num=%x\n", __FILE__, __LINE__, (int) info, num); #endif info->tty = 0; info->type = PORT_UNKNOWN; info->custom_divisor = 0; info->close_delay = 5*HZ/10; info->closing_wait = 30*HZ; info->x_char = 0; info->event = 0; info->count = 0; info->blocked_open = 0; info->tqueue.routine = do_softint; info->tqueue.data = info; info->tqueue_hangup.routine = do_serial_hangup; info->tqueue_hangup.data = info; info->callout_termios =callout_driver.init_termios; info->normal_termios = serial_driver.init_termios; info->open_wait = 0; info->close_wait = 0; info->delta_msr_wait = 0; info->icount.cts = info->icount.dsr = info->icount.rng = info->icount.dcd = 0; info->next_port = 0; info->prev_port = 0; retval = request_irq(info->irq, rs_or32_interrupt, IRQ_FLG_PRI_HI, "serial", NULL); if (retval) printk("SERIAL: failed to register interrup %d\n", info->irq); } /* * This routine is called whenever a serial port is opened. It * enables interrupts for a serial port, linking in its async structure into * the IRQ chain. It also performs the serial-specific * initialization for the tty structure. */ int rs_or32_open(struct tty_struct *tty, struct file * filp) { struct async_struct *info; info = rs_or32_table; info->count++; tty->driver_data = info; info->tty = tty; return 0; } /* * ------------------------------------------------------------ * rs_close() * * This routine is called when the serial port gets closed. First, we * wait for the last remaining data to be sent. Then, we unlink its * async structure from the interrupt chain if necessary, and we free * that IRQ if nothing is left in the chain. * ------------------------------------------------------------ */ static void rs_or32_close(struct tty_struct *tty, struct file * filp) { } static int rs_or32_write(struct tty_struct * tty, int from_user, const unsigned char *buf, int count) { int total = count; while (count--) { _print("%c", *buf); buf++; } return total; } static void rs_or32_put_char(struct tty_struct *tty, unsigned char ch) { _print("%c", ch); } static void rs_or32_flush_chars(struct tty_struct *tty) { } static int rs_or32_write_room(struct tty_struct *tty) { return 100; } static int rs_or32_chars_in_buffer(struct tty_struct *tty) { return 0; } static void rs_or32_flush_buffer(struct tty_struct *tty) { } static int rs_or32_ioctl(struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) { int error; struct async_struct * info = (struct async_struct *)tty->driver_data; int retval; if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) && (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { if (tty->flags & (1 << TTY_IO_ERROR)) return -EIO; } printk("%s - %s:%d\n",__FILE__,__FUNCTION__,__LINE__); switch (cmd) { case TIOCSBRK: /* Turn break on, unconditionally */ printk(" TIOCSBRK\n"); return 0; case TIOCCBRK: /* Turn break off, unconditionally */ printk(" TIOCCBRK\n"); return 0; case TCSBRK: /* SVID version: non-zero arg --> no break */ printk(" TCSBRK\n"); return 0; case TCSBRKP: /* support for POSIX tcsendbreak() */ printk(" TCSBRKP\n"); return 0; case TIOCGSOFTCAR: printk(" TIOCGSOFTCAR\n"); return 0; case TIOCSSOFTCAR: printk(" TIOCSSOFTCAR\n"); return 0; case TIOCMGET: printk(" TIOCMGET\n"); sizeof(unsigned int); case TIOCMBIS: case TIOCMBIC: case TIOCMSET: printk(" TIOCMSET\n"); return 0; case TIOCGSERIAL: printk(" TIOCGSERIAL\n"); return 0; case TIOCSSERIAL: printk(" TIOCSSERIAL\n"); return 0; case TIOCSERCONFIG: printk(" TIOCSERCONFIG\n"); return 0; case TIOCSERGETLSR: /* Get line status register */ printk(" TIOCSERGETLSR\n"); return 0; case TIOCSERGSTRUCT: printk(" TIOCSERGSTRUCT\n"); return 0; /* * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change * - mask passed in arg for lines of interest * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) * Caller should use TIOCGICOUNT to see which one it was */ case TIOCMIWAIT: printk(" TIOCMIWAIT\n"); return 0; case TIOCGICOUNT: printk(" TIOCGICOUNT\n"); return 0; default: printk(" default\n"); return -ENOIOCTLCMD; } return 0; } /* * ------------------------------------------------------------ * rs_throttle() * * This routine is called by the upper-layer tty layer to signal that * incoming characters should be throttled. * ------------------------------------------------------------ */ static void rs_or32_throttle(struct tty_struct * tty) { } static void rs_or32_unthrottle(struct tty_struct * tty) { } static void rs_or32_set_termios(struct tty_struct *tty, struct termios *old_termios) { } /* * ------------------------------------------------------------ * rs_stop() and rs_start() * * This routines are called before setting or resetting tty->stopped. * They enable or disable transmitter interrupts, as necessary. * ------------------------------------------------------------ */ static void rs_or32_stop(struct tty_struct *tty) { } static void rs_or32_start(struct tty_struct *tty) { } /* * rs_hangup() --- called by tty_hangup() when a hangup is signaled. */ void rs_or32_hangup(struct tty_struct *tty) { } /* * The serial driver boot-time initialization code! */ int rs_or32_init(void) { int i; struct async_struct * info; init_bh(SERIAL_BH, do_or32_serial_bh); /* Initialize the tty_driver structure */ memset(&serial_driver, 0, sizeof(struct tty_driver)); serial_driver.magic = TTY_DRIVER_MAGIC; serial_driver.name = "tty"; serial_driver.major = TTY_MAJOR; serial_driver.minor_start = 64; serial_driver.num = NR_PORTS; serial_driver.type = TTY_DRIVER_TYPE_SERIAL; serial_driver.subtype = SERIAL_TYPE_NORMAL; serial_driver.init_termios = tty_std_termios; serial_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; serial_driver.flags = TTY_DRIVER_REAL_RAW; serial_driver.refcount = &serial_refcount; serial_driver.table = serial_table; serial_driver.termios = serial_termios; serial_driver.termios_locked = serial_termios_locked; serial_driver.open = rs_or32_open; serial_driver.close = rs_or32_close; serial_driver.write = rs_or32_write; serial_driver.put_char = rs_or32_put_char; serial_driver.flush_chars = rs_or32_flush_chars; serial_driver.write_room = rs_or32_write_room; serial_driver.chars_in_buffer = rs_or32_chars_in_buffer; serial_driver.flush_buffer = rs_or32_flush_buffer; serial_driver.ioctl = rs_or32_ioctl; serial_driver.throttle = rs_or32_throttle; serial_driver.unthrottle = rs_or32_unthrottle; serial_driver.set_termios = rs_or32_set_termios; serial_driver.stop = rs_or32_stop; serial_driver.start = rs_or32_start; serial_driver.hangup = rs_or32_hangup; /* * The callout device is just like normal device except for * major number and the subtype code. */ callout_driver = serial_driver; callout_driver.name = "cua"; callout_driver.major = TTYAUX_MAJOR; callout_driver.subtype = SERIAL_TYPE_CALLOUT; if (tty_register_driver(&serial_driver)) panic("Couldn't register serial driver\n"); if (tty_register_driver(&callout_driver)) panic("Couldn't register callout driver\n"); for (i = 0, info = rs_or32_table; i < NR_PORTS; i++,info++) { init_port(info, i); } return 0; }
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