diff options
| -rw-r--r-- | drivers/usb/serial/ark3116.c | 11 | ||||
| -rw-r--r-- | drivers/usb/serial/cypress_m8.c | 49 | ||||
| -rw-r--r-- | drivers/usb/serial/digi_acceleport.c | 41 | ||||
| -rw-r--r-- | drivers/usb/serial/f81232.c | 198 | ||||
| -rw-r--r-- | drivers/usb/serial/generic.c | 76 | ||||
| -rw-r--r-- | drivers/usb/serial/io_edgeport.c | 37 | ||||
| -rw-r--r-- | drivers/usb/serial/iuu_phoenix.c | 4 | ||||
| -rw-r--r-- | drivers/usb/serial/oti6858.c | 5 | ||||
| -rw-r--r-- | drivers/usb/serial/pl2303.c | 58 | ||||
| -rw-r--r-- | drivers/usb/serial/spcp8x5.c | 5 | ||||
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 11 | ||||
| -rw-r--r-- | include/linux/usb/serial.h | 8 |
12 files changed, 324 insertions, 179 deletions
diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c index ff38aa8963cf..71a9206ea1e2 100644 --- a/drivers/usb/serial/ark3116.c +++ b/drivers/usb/serial/ark3116.c @@ -189,16 +189,6 @@ static int ark3116_port_remove(struct usb_serial_port *port) return 0; } -static void ark3116_init_termios(struct tty_struct *tty) -{ - struct ktermios *termios = &tty->termios; - *termios = tty_std_termios; - termios->c_cflag = B9600 | CS8 - | CREAD | HUPCL | CLOCAL; - termios->c_ispeed = 9600; - termios->c_ospeed = 9600; -} - static void ark3116_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) @@ -645,7 +635,6 @@ static struct usb_serial_driver ark3116_device = { .port_probe = ark3116_port_probe, .port_remove = ark3116_port_remove, .set_termios = ark3116_set_termios, - .init_termios = ark3116_init_termios, .get_serial = ark3116_get_serial_info, .tiocmget = ark3116_tiocmget, .tiocmset = ark3116_tiocmset, diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c index ed51bc48eea6..72d3ae1ebc64 100644 --- a/drivers/usb/serial/cypress_m8.c +++ b/drivers/usb/serial/cypress_m8.c @@ -98,7 +98,6 @@ struct cypress_private { int write_urb_interval; /* interval to use for write urb */ int read_urb_interval; /* interval to use for read urb */ int comm_is_ok; /* true if communication is (still) ok */ - int termios_initialized; __u8 line_control; /* holds dtr / rts value */ __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ __u8 current_config; /* stores the current configuration byte */ @@ -107,11 +106,7 @@ struct cypress_private { int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ int baud_rate; /* stores current baud rate in integer form */ - int isthrottled; /* if throttled, discard reads */ char prev_status; /* used for TIOCMIWAIT */ - /* we pass a pointer to this as the argument sent to - cypress_set_termios old_termios */ - struct ktermios tmp_termios; /* stores the old termios settings */ }; /* function prototypes for the Cypress USB to serial device */ @@ -126,6 +121,7 @@ static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count); static void cypress_send(struct usb_serial_port *port); static int cypress_write_room(struct tty_struct *tty); +static void cypress_earthmate_init_termios(struct tty_struct *tty); static void cypress_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old); static int cypress_tiocmget(struct tty_struct *tty); @@ -153,6 +149,7 @@ static struct usb_serial_driver cypress_earthmate_device = { .dtr_rts = cypress_dtr_rts, .write = cypress_write, .write_room = cypress_write_room, + .init_termios = cypress_earthmate_init_termios, .set_termios = cypress_set_termios, .tiocmget = cypress_tiocmget, .tiocmset = cypress_tiocmset, @@ -467,7 +464,6 @@ static int cypress_generic_port_probe(struct usb_serial_port *port) priv->cmd_ctrl = 0; priv->line_control = 0; - priv->termios_initialized = 0; priv->rx_flags = 0; /* Default packet format setting is determined by packet size. Anything with a size larger then 9 must have a separate @@ -604,7 +600,7 @@ static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port) cypress_send(port); if (tty) - cypress_set_termios(tty, port, &priv->tmp_termios); + cypress_set_termios(tty, port, NULL); /* setup the port and start reading from the device */ usb_fill_int_urb(port->interrupt_in_urb, serial->dev, @@ -857,6 +853,11 @@ static int cypress_tiocmset(struct tty_struct *tty, return cypress_write(tty, port, NULL, 0); } +static void cypress_earthmate_init_termios(struct tty_struct *tty) +{ + tty_encode_baud_rate(tty, 4800, 4800); +} + static void cypress_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { @@ -868,45 +869,11 @@ static void cypress_set_termios(struct tty_struct *tty, __u8 oldlines; int linechange = 0; - spin_lock_irqsave(&priv->lock, flags); - /* We can't clean this one up as we don't know the device type - early enough */ - if (!priv->termios_initialized) { - if (priv->chiptype == CT_EARTHMATE) { - tty->termios = tty_std_termios; - tty->termios.c_cflag = B4800 | CS8 | CREAD | HUPCL | - CLOCAL; - tty->termios.c_ispeed = 4800; - tty->termios.c_ospeed = 4800; - } else if (priv->chiptype == CT_CYPHIDCOM) { - tty->termios = tty_std_termios; - tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | - CLOCAL; - tty->termios.c_ispeed = 9600; - tty->termios.c_ospeed = 9600; - } else if (priv->chiptype == CT_CA42V2) { - tty->termios = tty_std_termios; - tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | - CLOCAL; - tty->termios.c_ispeed = 9600; - tty->termios.c_ospeed = 9600; - } - priv->termios_initialized = 1; - } - spin_unlock_irqrestore(&priv->lock, flags); - /* Unsupported features need clearing */ tty->termios.c_cflag &= ~(CMSPAR|CRTSCTS); cflag = tty->termios.c_cflag; - /* check if there are new settings */ - if (old_termios) { - spin_lock_irqsave(&priv->lock, flags); - priv->tmp_termios = tty->termios; - spin_unlock_irqrestore(&priv->lock, flags); - } - /* set number of data bits, parity, stop bits */ /* when parity is disabled the parity type bit is ignored */ diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index e7f244cf2c07..578ebdd86520 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -569,9 +569,9 @@ static int digi_set_modem_signals(struct usb_serial_port *port, ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); if (ret == 0) { oob_priv->dp_write_urb_in_use = 1; - port_priv->dp_modem_signals = - (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS)) - | (modem_signals&(TIOCM_DTR|TIOCM_RTS)); + port_priv->dp_modem_signals &= ~(TIOCM_DTR | TIOCM_RTS); + port_priv->dp_modem_signals |= + modem_signals & (TIOCM_DTR | TIOCM_RTS); } spin_unlock(&port_priv->dp_port_lock); spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); @@ -740,9 +740,9 @@ static void digi_set_termios(struct tty_struct *tty, /* set parity */ tty->termios.c_cflag &= ~CMSPAR; - if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) { - if (cflag&PARENB) { - if (cflag&PARODD) + if ((cflag & (PARENB | PARODD)) != (old_cflag & (PARENB | PARODD))) { + if (cflag & PARENB) { + if (cflag & PARODD) arg = DIGI_PARITY_ODD; else arg = DIGI_PARITY_EVEN; @@ -755,9 +755,9 @@ static void digi_set_termios(struct tty_struct *tty, buf[i++] = 0; } /* set word size */ - if ((cflag&CSIZE) != (old_cflag&CSIZE)) { + if ((cflag & CSIZE) != (old_cflag & CSIZE)) { arg = -1; - switch (cflag&CSIZE) { + switch (cflag & CSIZE) { case CS5: arg = DIGI_WORD_SIZE_5; break; case CS6: arg = DIGI_WORD_SIZE_6; break; case CS7: arg = DIGI_WORD_SIZE_7; break; @@ -765,7 +765,7 @@ static void digi_set_termios(struct tty_struct *tty, default: dev_dbg(dev, "digi_set_termios: can't handle word size %d\n", - (cflag&CSIZE)); + cflag & CSIZE); break; } @@ -779,9 +779,9 @@ static void digi_set_termios(struct tty_struct *tty, } /* set stop bits */ - if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) { + if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { - if ((cflag&CSTOPB)) + if ((cflag & CSTOPB)) arg = DIGI_STOP_BITS_2; else arg = DIGI_STOP_BITS_1; @@ -794,15 +794,15 @@ static void digi_set_termios(struct tty_struct *tty, } /* set input flow control */ - if ((iflag&IXOFF) != (old_iflag&IXOFF) - || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) { + if ((iflag & IXOFF) != (old_iflag & IXOFF) || + (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { arg = 0; - if (iflag&IXOFF) + if (iflag & IXOFF) arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; else arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; - if (cflag&CRTSCTS) { + if (cflag & CRTSCTS) { arg |= DIGI_INPUT_FLOW_CONTROL_RTS; /* On USB-4 it is necessary to assert RTS prior */ @@ -822,19 +822,18 @@ static void digi_set_termios(struct tty_struct *tty, } /* set output flow control */ - if ((iflag & IXON) != (old_iflag & IXON) - || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { + if ((iflag & IXON) != (old_iflag & IXON) || + (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { arg = 0; if (iflag & IXON) arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; else arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; - if (cflag & CRTSCTS) { + if (cflag & CRTSCTS) arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; - } else { + else arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; - } buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; buf[i++] = priv->dp_port_num; @@ -1084,7 +1083,7 @@ static int digi_chars_in_buffer(struct tty_struct *tty) static void digi_dtr_rts(struct usb_serial_port *port, int on) { /* Adjust DTR and RTS */ - digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1); + digi_set_modem_signals(port, on * (TIOCM_DTR | TIOCM_RTS), 1); } static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c index 0dcdcb4b2cde..43fa1f0716b7 100644 --- a/drivers/usb/serial/f81232.c +++ b/drivers/usb/serial/f81232.c @@ -28,7 +28,8 @@ static const struct usb_device_id id_table[] = { MODULE_DEVICE_TABLE(usb, id_table); /* Maximum baudrate for F81232 */ -#define F81232_MAX_BAUDRATE 115200 +#define F81232_MAX_BAUDRATE 1500000 +#define F81232_DEF_BAUDRATE 9600 /* USB Control EP parameter */ #define F81232_REGISTER_REQUEST 0xa0 @@ -41,19 +42,46 @@ MODULE_DEVICE_TABLE(usb, id_table); #define FIFO_CONTROL_REGISTER (0x02 + SERIAL_BASE_ADDRESS) #define LINE_CONTROL_REGISTER (0x03 + SERIAL_BASE_ADDRESS) #define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS) +#define LINE_STATUS_REGISTER (0x05 + SERIAL_BASE_ADDRESS) #define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS) +/* + * F81232 Clock registers (106h) + * + * Bit1-0: Clock source selector + * 00: 1.846MHz. + * 01: 18.46MHz. + * 10: 24MHz. + * 11: 14.77MHz. + */ +#define F81232_CLK_REGISTER 0x106 +#define F81232_CLK_1_846_MHZ 0 +#define F81232_CLK_18_46_MHZ BIT(0) +#define F81232_CLK_24_MHZ BIT(1) +#define F81232_CLK_14_77_MHZ (BIT(1) | BIT(0)) +#define F81232_CLK_MASK GENMASK(1, 0) + struct f81232_private { struct mutex lock; u8 modem_control; u8 modem_status; + u8 shadow_lcr; + speed_t baud_base; + struct work_struct lsr_work; struct work_struct interrupt_work; struct usb_serial_port *port; }; -static int calc_baud_divisor(speed_t baudrate) +static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 }; +static u8 const clock_table[] = { F81232_CLK_1_846_MHZ, F81232_CLK_14_77_MHZ, + F81232_CLK_18_46_MHZ, F81232_CLK_24_MHZ }; + +static int calc_baud_divisor(speed_t baudrate, speed_t clockrate) { - return DIV_ROUND_CLOSEST(F81232_MAX_BAUDRATE, baudrate); + if (!baudrate) + return 0; + + return DIV_ROUND_CLOSEST(clockrate, baudrate); } static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val) @@ -127,6 +155,21 @@ static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val) return status; } +static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg, + u8 mask, u8 val) +{ + int status; + u8 tmp; + + status = f81232_get_register(port, reg, &tmp); + if (status) + return status; + + tmp = (tmp & ~mask) | (val & mask); + + return f81232_set_register(port, reg, tmp); +} + static void f81232_read_msr(struct usb_serial_port *port) { int status; @@ -282,6 +325,7 @@ exit: static void f81232_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; + struct f81232_private *priv = usb_get_serial_port_data(port); unsigned char *data = urb->transfer_buffer; char tty_flag; unsigned int i; @@ -315,6 +359,7 @@ static void f81232_process_read_urb(struct urb *urb) if (lsr & UART_LSR_OE) { port->icount.overrun++; + schedule_work(&priv->lsr_work); tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); } @@ -333,22 +378,72 @@ static void f81232_process_read_urb(struct urb *urb) static void f81232_break_ctl(struct tty_struct *tty, int break_state) { - /* FIXME - Stubbed out for now */ + struct usb_serial_port *port = tty->driver_data; + struct f81232_private *priv = usb_get_serial_port_data(port); + int status; - /* - * break_state = -1 to turn on break, and 0 to turn off break - * see drivers/char/tty_io.c to see it used. - * last_set_data_urb_value NEVER has the break bit set in it. - */ + mutex_lock(&priv->lock); + + if (break_state) + priv->shadow_lcr |= UART_LCR_SBC; + else + priv->shadow_lcr &= ~UART_LCR_SBC; + + status = f81232_set_register(port, LINE_CONTROL_REGISTER, + priv->shadow_lcr); + if (status) + dev_err(&port->dev, "set break failed: %d\n", status); + + mutex_unlock(&priv->lock); } -static void f81232_set_baudrate(struct usb_serial_port *port, speed_t baudrate) +static int f81232_find_clk(speed_t baudrate) { + int idx; + + for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) { + if (baudrate <= baudrate_table[idx] && + baudrate_table[idx] % baudrate == 0) + return idx; + } + + return -EINVAL; +} + +static void f81232_set_baudrate(struct tty_struct *tty, + struct usb_serial_port *port, speed_t baudrate, + speed_t old_baudrate) +{ + struct f81232_private *priv = usb_get_serial_port_data(port); u8 lcr; int divisor; int status = 0; + int i; + int idx; + speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE }; + + for (i = 0; i < ARRAY_SIZE(baud_list); ++i) { + idx = f81232_find_clk(baud_list[i]); + if (idx >= 0) { + baudrate = baud_list[i]; + tty_encode_baud_rate(tty, baudrate, baudrate); + break; + } + } - divisor = calc_baud_divisor(baudrate); + if (idx < 0) + return; + + priv->baud_base = baudrate_table[idx]; + divisor = calc_baud_divisor(baudrate, priv->baud_base); + + status = f81232_set_mask_register(port, F81232_CLK_REGISTER, + F81232_CLK_MASK, clock_table[idx]); + if (status) { + dev_err(&port->dev, "%s failed to set CLK_REG: %d\n", + __func__, status); + return; + } status = f81232_get_register(port, LINE_CONTROL_REGISTER, &lcr); /* get LCR */ @@ -435,9 +530,11 @@ static int f81232_port_disable(struct usb_serial_port *port) static void f81232_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { + struct f81232_private *priv = usb_get_serial_port_data(port); u8 new_lcr = 0; int status = 0; speed_t baudrate; + speed_t old_baud; /* Don't change anything if nothing has changed */ if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) @@ -450,11 +547,12 @@ static void f81232_set_termios(struct tty_struct *tty, baudrate = tty_get_baud_rate(tty); if (baudrate > 0) { - if (baudrate > F81232_MAX_BAUDRATE) { - baudrate = F81232_MAX_BAUDRATE; - tty_encode_baud_rate(tty, baudrate, baudrate); - } - f81232_set_baudrate(port, baudrate); + if (old_termios) + old_baud = tty_termios_baud_rate(old_termios); + else + old_baud = F81232_DEF_BAUDRATE; + + f81232_set_baudrate(tty, port, baudrate, old_baud); } if (C_PARENB(tty)) { @@ -486,11 +584,18 @@ static void f81232_set_termios(struct tty_struct *tty, break; } + mutex_lock(&priv->lock); + + new_lcr |= (priv->shadow_lcr & UART_LCR_SBC); status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr); if (status) { dev_err(&port->dev, "%s failed to set LCR: %d\n", __func__, status); } + + priv->shadow_lcr = new_lcr; + + mutex_unlock(&priv->lock); } static int f81232_tiocmget(struct tty_struct *tty) @@ -556,9 +661,13 @@ static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port) static void f81232_close(struct usb_serial_port *port) { + struct f81232_private *port_priv = usb_get_serial_port_data(port); + f81232_port_disable(port); usb_serial_generic_close(port); usb_kill_urb(port->interrupt_in_urb); + flush_work(&port_priv->interrupt_work); + flush_work(&port_priv->lsr_work); } static void f81232_dtr_rts(struct usb_serial_port *port, int on) @@ -587,11 +696,12 @@ static int f81232_get_serial_info(struct tty_struct *tty, struct serial_struct *ss) { struct usb_serial_port *port = tty->driver_data; + struct f81232_private *priv = usb_get_serial_port_data(port); ss->type = PORT_16550A; ss->line = port->minor; ss->port = port->port_number; - ss->baud_base = F81232_MAX_BAUDRATE; + ss->baud_base = priv->baud_base; return 0; } @@ -603,6 +713,21 @@ static void f81232_interrupt_work(struct work_struct *work) f81232_read_msr(priv->port); } +static void f81232_lsr_worker(struct work_struct *work) +{ + struct f81232_private *priv; + struct usb_serial_port *port; + int status; + u8 tmp; + + priv = container_of(work, struct f81232_private, lsr_work); + port = priv->port; + + status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp); + if (status) + dev_warn(&port->dev, "read LSR failed: %d\n", status); +} + static int f81232_port_probe(struct usb_serial_port *port) { struct f81232_private *priv; @@ -613,6 +738,7 @@ static int f81232_port_probe(struct usb_serial_port *port) mutex_init(&priv->lock); INIT_WORK(&priv->interrupt_work, f81232_interrupt_work); + INIT_WORK(&priv->lsr_work, f81232_lsr_worker); usb_set_serial_port_data(port, priv); @@ -632,6 +758,42 @@ static int f81232_port_remove(struct usb_serial_port *port) return 0; } +static int f81232_suspend(struct usb_serial *serial, pm_message_t message) +{ + struct usb_serial_port *port = serial->port[0]; + struct f81232_private *port_priv = usb_get_serial_port_data(port); + int i; + + for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) + usb_kill_urb(port->read_urbs[i]); + + usb_kill_urb(port->interrupt_in_urb); + + if (port_priv) { + flush_work(&port_priv->interrupt_work); + flush_work(&port_priv->lsr_work); + } + + return 0; +} + +static int f81232_resume(struct usb_serial *serial) +{ + struct usb_serial_port *port = serial->port[0]; + int result; + + if (tty_port_initialized(&port->port)) { + result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); + if (result) { + dev_err(&port->dev, "submit interrupt urb failed: %d\n", + result); + return result; + } + } + + return usb_serial_generic_resume(serial); +} + static struct usb_serial_driver f81232_device = { .driver = { .owner = THIS_MODULE, @@ -655,6 +817,8 @@ static struct usb_serial_driver f81232_device = { .read_int_callback = f81232_read_int_callback, .port_probe = f81232_port_probe, .port_remove = f81232_port_remove, + .suspend = f81232_suspend, + .resume = f81232_resume, }; static struct usb_serial_driver * const serial_drivers[] = { diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c index 2274d9625f63..1be8bea372a2 100644 --- a/drivers/usb/serial/generic.c +++ b/drivers/usb/serial/generic.c @@ -106,12 +106,8 @@ void usb_serial_generic_deregister(void) int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port) { int result = 0; - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); - port->throttled = 0; - port->throttle_req = 0; - spin_unlock_irqrestore(&port->lock, flags); + clear_bit(USB_SERIAL_THROTTLED, &port->flags); if (port->bulk_in_size) result = usb_serial_generic_submit_read_urbs(port, GFP_KERNEL); @@ -375,7 +371,7 @@ void usb_serial_generic_read_bulk_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; unsigned char *data = urb->transfer_buffer; - unsigned long flags; + bool stopped = false; int status = urb->status; int i; @@ -383,42 +379,55 @@ void usb_serial_generic_read_bulk_callback(struct urb *urb) if (urb == port->read_urbs[i]) break; } - set_bit(i, &port->read_urbs_free); dev_dbg(&port->dev, "%s - urb %d, len %d\n", __func__, i, urb->actual_length); switch (status) { case 0: + usb_serial_debug_data(&port->dev, __func__, urb->actual_length, + data); + port->serial->type->process_read_urb(urb); break; case -ENOENT: case -ECONNRESET: case -ESHUTDOWN: dev_dbg(&port->dev, "%s - urb stopped: %d\n", __func__, status); - return; + stopped = true; + break; case -EPIPE: dev_err(&port->dev, "%s - urb stopped: %d\n", __func__, status); - return; + stopped = true; + break; default: dev_dbg(&port->dev, "%s - nonzero urb status: %d\n", __func__, status); - goto resubmit; + break; } - usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); - port->serial->type->process_read_urb(urb); + /* + * Make sure URB processing is done before marking as free to avoid + * racing with unthrottle() on another CPU. Matches the barriers + * implied by the test_and_clear_bit() in + * usb_serial_generic_submit_read_urb(). + */ + smp_mb__before_atomic(); + set_bit(i, &port->read_urbs_free); + /* + * Make sure URB is marked as free before checking the throttled flag + * to avoid racing with unthrottle() on another CPU. Matches the + * smp_mb() in unthrottle(). + */ + smp_mb__after_atomic(); -resubmit: - /* Throttle the device if requested by tty */ - spin_lock_irqsave(&port->lock, flags); - port->throttled = port->throttle_req; - if (!port->throttled) { - spin_unlock_irqrestore(&port->lock, flags); - usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC); - } else { - spin_unlock_irqrestore(&port->lock, flags); - } + if (stopped) + return; + + if (test_bit(USB_SERIAL_THROTTLED, &port->flags)) + return; + + usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC); } EXPORT_SYMBOL_GPL(usb_serial_generic_read_bulk_callback); @@ -454,10 +463,9 @@ void usb_serial_generic_write_bulk_callback(struct urb *urb) default: dev_err_console(port, "%s - nonzero urb status: %d\n", __func__, status); - goto resubmit; + break; } -resubmit: usb_serial_generic_write_start(port, GFP_ATOMIC); usb_serial_port_softint(port); } @@ -466,26 +474,24 @@ EXPORT_SYMBOL_GPL(usb_serial_generic_write_bulk_callback); void usb_serial_generic_throttle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); - port->throttle_req = 1; - spin_unlock_irqrestore(&port->lock, flags); + set_bit(USB_SERIAL_THROTTLED, &port->flags); } EXPORT_SYMBOL_GPL(usb_serial_generic_throttle); void usb_serial_generic_unthrottle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; - int was_throttled; - spin_lock_irq(&port->lock); - was_throttled = port->throttled; - port->throttled = port->throttle_req = 0; - spin_unlock_irq(&port->lock); + clear_bit(USB_SERIAL_THROTTLED, &port->flags); + + /* + * Matches the smp_mb__after_atomic() in + * usb_serial_generic_read_bulk_callback(). + */ + smp_mb(); - if (was_throttled) - usb_serial_generic_submit_read_urbs(port, GFP_KERNEL); + usb_serial_generic_submit_read_urbs(port, GFP_KERNEL); } EXPORT_SYMBOL_GPL(usb_serial_generic_unthrottle); diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index 4ca31c0e4174..48a439298a68 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -1751,7 +1751,7 @@ static void process_rcvd_data(struct edgeport_serial *edge_serial, edge_serial->rxState = EXPECT_HDR2; break; } - /* otherwise, drop on through */ + /* Fall through */ case EXPECT_HDR2: edge_serial->rxHeader2 = *buffer; ++buffer; @@ -1790,29 +1790,20 @@ static void process_rcvd_data(struct edgeport_serial *edge_serial, edge_serial->rxHeader2, 0); edge_serial->rxState = EXPECT_HDR1; break; - } else { - edge_serial->rxPort = - IOSP_GET_HDR_PORT(edge_serial->rxHeader1); - edge_serial->rxBytesRemaining = - IOSP_GET_HDR_DATA_LEN( - edge_serial->rxHeader1, - edge_serial->rxHeader2); - dev_dbg(dev, "%s - Data for Port %u Len %u\n", - __func__, - edge_serial->rxPort, - edge_serial->rxBytesRemaining); - - /* ASSERT(DevExt->RxPort < DevExt->NumPorts); - * ASSERT(DevExt->RxBytesRemaining < - * IOSP_MAX_DATA_LENGTH); - */ - - if (bufferLength == 0) { - edge_serial->rxState = EXPECT_DATA; - break; - } - /* Else, drop through */ } + + edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); + edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, + edge_serial->rxHeader2); + dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__, + edge_serial->rxPort, + edge_serial->rxBytesRemaining); + + if (bufferLength == 0) { + edge_serial->rxState = EXPECT_DATA; + break; + } + /* Fall through */ case EXPECT_DATA: /* Expect data */ if (bufferLength < edge_serial->rxBytesRemaining) { rxLen = bufferLength; diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c index 449e89db9cea..d5bff69b1769 100644 --- a/drivers/usb/serial/iuu_phoenix.c +++ b/drivers/usb/serial/iuu_phoenix.c @@ -942,9 +942,7 @@ static void iuu_close(struct usb_serial_port *port) static void iuu_init_termios(struct tty_struct *tty) { - tty->termios = tty_std_termios; - tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600 - | TIOCM_CTS | CSTOPB | PARENB; + tty->termios.c_cflag = B9600 | CS8 | CSTOPB | CREAD | PARENB | CLOCAL; tty->termios.c_ispeed = 9600; tty->termios.c_ospeed = 9600; tty->termios.c_lflag = 0; diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c index ae9cb15ee02d..38ae0fc826cc 100644 --- a/drivers/usb/serial/oti6858.c +++ b/drivers/usb/serial/oti6858.c @@ -393,10 +393,7 @@ static int oti6858_chars_in_buffer(struct tty_struct *tty) static void oti6858_init_termios(struct tty_struct *tty) { - tty->termios = tty_std_termios; - tty->termios.c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL; - tty->termios.c_ispeed = 38400; - tty->termios.c_ospeed = 38400; + tty_encode_baud_rate(tty, 38400, 38400); } static void oti6858_set_termios(struct tty_struct *tty, diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index bb3f9aa4a909..55122ac84518 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -145,6 +145,8 @@ MODULE_DEVICE_TABLE(usb, id_table); #define UART_OVERRUN_ERROR 0x40 #define UART_CTS 0x80 +#define PL2303_FLOWCTRL_MASK 0xf0 + static void pl2303_set_break(struct usb_serial_port *port, bool enable); enum pl2303_type { @@ -156,6 +158,7 @@ enum pl2303_type { struct pl2303_type_data { speed_t max_baud_rate; unsigned long quirks; + unsigned int no_autoxonxoff:1; }; struct pl2303_serial_private { @@ -173,11 +176,12 @@ struct pl2303_private { static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { [TYPE_01] = { - .max_baud_rate = 1228800, - .quirks = PL2303_QUIRK_LEGACY, + .max_baud_rate = 1228800, + .quirks = PL2303_QUIRK_LEGACY, + .no_autoxonxoff = true, }, [TYPE_HX] = { - .max_baud_rate = 12000000, + .max_baud_rate = 12000000, }, }; @@ -223,6 +227,29 @@ static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) return 0; } +static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val) +{ + int ret = 0; + u8 *buf; + + buf = kmalloc(1, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ret = pl2303_vendor_read(serial, reg | 0x80, buf); + if (ret) + goto out_free; + + *buf &= ~mask; + *buf |= val & mask; + + ret = pl2303_vendor_write(serial, reg, *buf); +out_free: + kfree(buf); + + return ret; +} + static int pl2303_probe(struct usb_serial *serial, const struct usb_device_id *id) { @@ -552,6 +579,20 @@ static bool pl2303_termios_change(const struct ktermios *a, const struct ktermio return tty_termios_hw_change(a, b) || ixon_change; } +static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) +{ + if (!I_IXON(tty) || I_IXANY(tty)) + return false; + + if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13) + return false; + + if (type->no_autoxonxoff) + return false; + + return true; +} + static void pl2303_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { @@ -678,14 +719,13 @@ static void pl2303_set_termios(struct tty_struct *tty, if (C_CRTSCTS(tty)) { if (spriv->quirks & PL2303_QUIRK_LEGACY) - pl2303_vendor_write(serial, 0x0, 0x41); + pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); else - pl2303_vendor_write(serial, 0x0, 0x61); - } else if (I_IXON(tty) && !I_IXANY(tty) && START_CHAR(tty) == 0x11 && - STOP_CHAR(tty) == 0x13) { - pl2303_vendor_write(serial, 0x0, 0xc0); + pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); + } else if (pl2303_enable_xonxoff(tty, spriv->type)) { + pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); } else { - pl2303_vendor_write(serial, 0x0, 0x0); + pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); } kfree(buf); diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c index b42714855364..3bac55bd9bd9 100644 --- a/drivers/usb/serial/spcp8x5.c +++ b/drivers/usb/serial/spcp8x5.c @@ -281,10 +281,7 @@ static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on) static void spcp8x5_init_termios(struct tty_struct *tty) { - tty->termios = tty_std_termios; - tty->termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL; - tty->termios.c_ispeed = 115200; - tty->termios.c_ospeed = 115200; + tty_encode_baud_rate(tty, 115200, 115200); } static void spcp8x5_set_termios(struct tty_struct *tty, diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 7e89efbf2c28..676c296103a2 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -164,9 +164,9 @@ void usb_serial_put(struct usb_serial *serial) * @driver: the driver (USB in our case) * @tty: the tty being created * - * Create the termios objects for this tty. We use the default + * Initialise the termios structure for this tty. We use the default * USB serial settings but permit them to be overridden by - * serial->type->init_termios. + * serial->type->init_termios on first open. * * This is the first place a new tty gets used. Hence this is where we * acquire references to the usb_serial structure and the driver module, @@ -178,6 +178,7 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty) int idx = tty->index; struct usb_serial *serial; struct usb_serial_port *port; + bool init_termios; int retval = -ENODEV; port = usb_serial_port_get_by_minor(idx); @@ -192,14 +193,16 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty) if (retval) goto error_get_interface; + init_termios = (driver->termios[idx] == NULL); + retval = tty_standard_install(driver, tty); if (retval) goto error_init_termios; mutex_unlock(&serial->disc_mutex); - /* allow the driver to update the settings */ - if (serial->type->init_termios) + /* allow the driver to update the initial settings */ + if (init_termios && serial->type->init_termios) serial->type->init_termios(tty); tty->driver_data = port; diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h index 1c19f77ed541..14cac4a1ae8f 100644 --- a/include/linux/usb/serial.h +++ b/include/linux/usb/serial.h @@ -23,11 +23,9 @@ /* The maximum number of ports one device can grab at once */ #define MAX_NUM_PORTS 16 -/* parity check flag */ -#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) - /* USB serial flags */ #define USB_SERIAL_WRITE_BUSY 0 +#define USB_SERIAL_THROTTLED 1 /** * usb_serial_port: structure for the specific ports of a device. @@ -67,8 +65,6 @@ * @flags: usb serial port flags * @write_wait: a wait_queue_head_t used by the port. * @work: work queue entry for the line discipline waking up. - * @throttled: nonzero if the read urb is inactive to throttle the device - * @throttle_req: nonzero if the tty wants to throttle us * @dev: pointer to the serial device * * This structure is used by the usb-serial core and drivers for the specific @@ -115,8 +111,6 @@ struct usb_serial_port { unsigned long flags; wait_queue_head_t write_wait; struct work_struct work; - char throttled; - char throttle_req; unsigned long sysrq; /* sysrq timeout */ struct device dev; }; |