From f64c84a1668930d1ca2b7dbaa92146c2139cb508 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Sat, 10 Feb 2007 01:45:21 -0800 Subject: [PATCH] [PATCH] Char: mxser_new, upgrade to 1.9.15 - allow special rates - break when bad status Signed-off-by: Jiri Slaby Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/mxser_new.c | 111 ++++++++++++++++++++++++++++++++------- drivers/char/mxser_new.h | 14 +++++ 2 files changed, 105 insertions(+), 20 deletions(-) diff --git a/drivers/char/mxser_new.c b/drivers/char/mxser_new.c index 0b66056cd400..4c805496fb36 100644 --- a/drivers/char/mxser_new.c +++ b/drivers/char/mxser_new.c @@ -49,7 +49,7 @@ #include "mxser_new.h" -#define MXSER_VERSION "2.0" +#define MXSER_VERSION "2.0.1" /* 1.9.15 */ #define MXSERMAJOR 174 #define MXSERCUMAJOR 175 @@ -179,6 +179,18 @@ static struct pci_device_id mxser_pcibrds[] = { }; MODULE_DEVICE_TABLE(pci, mxser_pcibrds); +static int mxvar_baud_table[] = { + 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 +}; +static unsigned int mxvar_baud_table1[] = { + 0, B50, B75, B110, B134, B150, B200, B300, B600, B1200, B1800, B2400, + B4800, B9600, B19200, B38400, B57600, B115200, B230400, B460800, B921600 +}; +#define BAUD_TABLE_NO ARRAY_SIZE(mxvar_baud_table) + +#define B_SPEC B2000000 + static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 }; static int ttymajor = MXSERMAJOR; static int calloutmajor = MXSERCUMAJOR; @@ -240,6 +252,7 @@ struct mxser_port { long realbaud; int type; /* UART type */ int flags; /* defined in tty.h */ + int speed; int x_char; /* xon/xoff character */ int IER; /* Interrupt Enable Register */ @@ -444,10 +457,10 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, static int mxser_set_baud(struct mxser_port *info, long newspd) { + unsigned int i; int quot = 0; unsigned char cval; int ret = 0; - unsigned long flags; if (!info->tty || !info->tty->termios) return ret; @@ -459,29 +472,34 @@ static int mxser_set_baud(struct mxser_port *info, long newspd) return 0; info->realbaud = newspd; - if (newspd == 134) { - quot = (2 * info->baud_base / 269); - } else if (newspd) { - quot = info->baud_base / newspd; - if (quot == 0) - quot = 1; + for (i = 0; i < BAUD_TABLE_NO; i++) + if (newspd == mxvar_baud_table[i]) + break; + if (i == BAUD_TABLE_NO) { + quot = info->baud_base / info->speed; + if (info->speed <= 0 || info->speed > info->max_baud) + quot = 0; } else { - quot = 0; + if (newspd == 134) { + quot = (2 * info->baud_base / 269); + } else if (newspd) { + quot = info->baud_base / newspd; + if (quot == 0) + quot = 1; + } else { + quot = 0; + } } info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base); info->timeout += HZ / 50; /* Add .02 seconds of slop */ if (quot) { - spin_lock_irqsave(&info->slock, flags); info->MCR |= UART_MCR_DTR; outb(info->MCR, info->ioaddr + UART_MCR); - spin_unlock_irqrestore(&info->slock, flags); } else { - spin_lock_irqsave(&info->slock, flags); info->MCR &= ~UART_MCR_DTR; outb(info->MCR, info->ioaddr + UART_MCR); - spin_unlock_irqrestore(&info->slock, flags); return ret; } @@ -493,6 +511,18 @@ static int mxser_set_baud(struct mxser_port *info, long newspd) outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */ outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */ + if (i == BAUD_TABLE_NO) { + quot = info->baud_base % info->speed; + quot *= 8; + if ((quot % info->speed) > (info->speed / 2)) { + quot /= info->speed; + quot++; + } else { + quot /= info->speed; + } + SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot); + } else + SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0); return ret; } @@ -508,7 +538,6 @@ static int mxser_change_speed(struct mxser_port *info, int ret = 0; unsigned char status; long baud; - unsigned long flags; if (!info->tty || !info->tty->termios) return ret; @@ -517,7 +546,10 @@ static int mxser_change_speed(struct mxser_port *info, return ret; if (mxser_set_baud_method[info->tty->index] == 0) { - baud = tty_get_baud_rate(info->tty); + if ((cflag & CBAUD) == B_SPEC) + baud = info->speed; + else + baud = tty_get_baud_rate(info->tty); mxser_set_baud(info, baud); } @@ -656,7 +688,6 @@ static int mxser_change_speed(struct mxser_port *info, } } if (info->board->chip_flag) { - spin_lock_irqsave(&info->slock, flags); SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty)); SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty)); if (I_IXON(info->tty)) { @@ -669,7 +700,6 @@ static int mxser_change_speed(struct mxser_port *info, } else { DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr); } - spin_unlock_irqrestore(&info->slock, flags); } @@ -822,8 +852,8 @@ static int mxser_startup(struct mxser_port *info) /* * and set the speed of the serial port */ - spin_unlock_irqrestore(&info->slock, flags); mxser_change_speed(info, NULL); + spin_unlock_irqrestore(&info->slock, flags); info->flags |= ASYNC_INITIALIZED; return 0; @@ -1195,6 +1225,7 @@ static int mxser_set_serial_info(struct mxser_port *info, struct serial_struct __user *new_info) { struct serial_struct new_serial; + unsigned long sl_flags; unsigned int flags; int retval = 0; @@ -1237,8 +1268,11 @@ static int mxser_set_serial_info(struct mxser_port *info, process_txrx_fifo(info); if (info->flags & ASYNC_INITIALIZED) { - if (flags != (info->flags & ASYNC_SPD_MASK)) + if (flags != (info->flags & ASYNC_SPD_MASK)) { + spin_lock_irqsave(&info->slock, sl_flags); mxser_change_speed(info, NULL); + spin_unlock_irqrestore(&info->slock, sl_flags); + } } else retval = mxser_startup(info); @@ -1615,6 +1649,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, struct serial_icounter_struct __user *p_cuser; unsigned long templ; unsigned long flags; + unsigned int i; void __user *argp = (void __user *)arg; int retval; @@ -1653,6 +1688,36 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, return 0; } + if (cmd == MOXA_SET_SPECIAL_BAUD_RATE) { + int speed; + + if (get_user(speed, (int __user *)argp)) + return -EFAULT; + if (speed <= 0 || speed > info->max_baud) + return -EFAULT; + if (!info->tty || !info->tty->termios || !info->ioaddr) + return 0; + info->tty->termios->c_cflag &= ~(CBAUD | CBAUDEX); + for (i = 0; i < BAUD_TABLE_NO; i++) + if (speed == mxvar_baud_table[i]) + break; + if (i == BAUD_TABLE_NO) { + info->tty->termios->c_cflag |= B_SPEC; + } else if (speed != 0) + info->tty->termios->c_cflag |= mxvar_baud_table1[i]; + + info->speed = speed; + spin_lock_irqsave(&info->slock, flags); + mxser_change_speed(info, 0); + spin_unlock_irqrestore(&info->slock, flags); + + return 0; + } else if (cmd == MOXA_GET_SPECIAL_BAUD_RATE) { + if (copy_to_user(argp, &info->speed, sizeof(int))) + return -EFAULT; + return 0; + } + if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT && test_bit(TTY_IO_ERROR, &tty->flags)) return -EIO; @@ -1770,7 +1835,9 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, long baud; if (get_user(baud, (long __user *)argp)) return -EFAULT; + spin_lock_irqsave(&info->slock, flags); mxser_set_baud(info, baud); + spin_unlock_irqrestore(&info->slock, flags); return 0; } case MOXA_ASPP_GETBAUD: @@ -1947,7 +2014,9 @@ static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termi if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) { + spin_lock_irqsave(&info->slock, flags); mxser_change_speed(info, old_termios); + spin_unlock_irqrestore(&info->slock, flags); if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) { @@ -2137,7 +2206,8 @@ intr_old: } else if (*status & UART_LSR_OE) { flag = TTY_OVERRUN; port->icount.overrun++; - } + } else + flag = TTY_BREAK; } tty_insert_flip_char(tty, ch, flag); cnt++; @@ -2385,6 +2455,7 @@ static int __devinit mxser_initbrd(struct mxser_board *brd, info->normal_termios = mxvar_sdriver->init_termios; init_waitqueue_head(&info->open_wait); init_waitqueue_head(&info->delta_msr_wait); + info->speed = 9600; memset(&info->mon_data, 0, sizeof(struct mxser_mon)); info->err_shadow = 0; spin_lock_init(&info->slock); diff --git a/drivers/char/mxser_new.h b/drivers/char/mxser_new.h index 04fa5fc9226d..d42f7766c652 100644 --- a/drivers/char/mxser_new.h +++ b/drivers/char/mxser_new.h @@ -35,6 +35,8 @@ #define MOXA_ASPP_LSTATUS (MOXA + 74) #define MOXA_ASPP_MON_EXT (MOXA + 75) #define MOXA_SET_BAUD_METHOD (MOXA + 76) +#define MOXA_SET_SPECIAL_BAUD_RATE (MOXA + 77) +#define MOXA_GET_SPECIAL_BAUD_RATE (MOXA + 78) /* --------------------------------------------------- */ @@ -212,6 +214,18 @@ outb(__oldlcr, (info)->ioaddr+UART_LCR); \ } while (0) +#define SET_MOXA_MUST_ENUM_VALUE(baseio, Value) do { \ + u8 __oldlcr, __efr; \ + __oldlcr = inb((baseio)+UART_LCR); \ + outb(MOXA_MUST_ENTER_ENCHANCE, (baseio)+UART_LCR); \ + __efr = inb((baseio)+MOXA_MUST_EFR_REGISTER); \ + __efr &= ~MOXA_MUST_EFR_BANK_MASK; \ + __efr |= MOXA_MUST_EFR_BANK2; \ + outb(__efr, (baseio)+MOXA_MUST_EFR_REGISTER); \ + outb((u8)(Value), (baseio)+MOXA_MUST_ENUM_REGISTER); \ + outb(__oldlcr, (baseio)+UART_LCR); \ +} while (0) + #define GET_MOXA_MUST_HARDWARE_ID(baseio, pId) do { \ u8 __oldlcr, __efr; \ __oldlcr = inb((baseio)+UART_LCR); \ -- 2.30.2