diff options
Diffstat (limited to 'drivers/usb')
-rw-r--r-- | drivers/usb/serial/aircable.c | 2 | ||||
-rw-r--r-- | drivers/usb/serial/ch341.c | 127 | ||||
-rw-r--r-- | drivers/usb/serial/console.c | 5 | ||||
-rw-r--r-- | drivers/usb/serial/cp210x.c | 228 | ||||
-rw-r--r-- | drivers/usb/serial/cypress_m8.c | 4 | ||||
-rw-r--r-- | drivers/usb/serial/f81232.c | 4 | ||||
-rw-r--r-- | drivers/usb/serial/f81534.c | 2 | ||||
-rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 59 | ||||
-rw-r--r-- | drivers/usb/serial/garmin_gps.c | 13 | ||||
-rw-r--r-- | drivers/usb/serial/generic.c | 22 | ||||
-rw-r--r-- | drivers/usb/serial/io_edgeport.c | 4 | ||||
-rw-r--r-- | drivers/usb/serial/iuu_phoenix.c | 26 | ||||
-rw-r--r-- | drivers/usb/serial/keyspan_pda.c | 3 | ||||
-rw-r--r-- | drivers/usb/serial/kobil_sct.c | 6 | ||||
-rw-r--r-- | drivers/usb/serial/mxuport.c | 6 | ||||
-rw-r--r-- | drivers/usb/serial/option.c | 3 | ||||
-rw-r--r-- | drivers/usb/serial/pl2303.c | 2 | ||||
-rw-r--r-- | drivers/usb/serial/qcserial.c | 1 | ||||
-rw-r--r-- | drivers/usb/serial/quatech2.c | 18 | ||||
-rw-r--r-- | drivers/usb/serial/sierra.c | 61 | ||||
-rw-r--r-- | drivers/usb/serial/ssu100.c | 7 | ||||
-rw-r--r-- | drivers/usb/serial/upd78f0730.c | 2 |
22 files changed, 459 insertions, 146 deletions
diff --git a/drivers/usb/serial/aircable.c b/drivers/usb/serial/aircable.c index 84d52953dd0a..a1df686c3066 100644 --- a/drivers/usb/serial/aircable.c +++ b/drivers/usb/serial/aircable.c @@ -117,7 +117,7 @@ static int aircable_process_packet(struct usb_serial_port *port, static void aircable_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; - char *data = (char *)urb->transfer_buffer; + char *data = urb->transfer_buffer; int has_headers; int count; int len; diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index 8fbaef5c9d69..a2e2f56c88cd 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -59,7 +59,11 @@ #define CH341_REQ_MODEM_CTRL 0xA4 #define CH341_REG_BREAK 0x05 +#define CH341_REG_PRESCALER 0x12 +#define CH341_REG_DIVISOR 0x13 #define CH341_REG_LCR 0x18 +#define CH341_REG_LCR2 0x25 + #define CH341_NBREAK_BITS 0x01 #define CH341_LCR_ENABLE_RX 0x80 @@ -74,6 +78,7 @@ #define CH341_LCR_CS5 0x00 #define CH341_QUIRK_LIMITED_PRESCALER BIT(0) +#define CH341_QUIRK_SIMULATE_BREAK BIT(1) static const struct usb_device_id id_table[] = { { USB_DEVICE(0x4348, 0x5523) }, @@ -91,6 +96,7 @@ struct ch341_private { u8 msr; u8 lcr; unsigned long quirks; + unsigned long break_end; }; static void ch341_set_termios(struct tty_struct *tty, @@ -153,6 +159,10 @@ static const speed_t ch341_min_rates[] = { CH341_MIN_RATE(3), }; +/* Supported range is 46 to 3000000 bps. */ +#define CH341_MIN_BPS DIV_ROUND_UP(CH341_CLKRATE, CH341_CLK_DIV(0, 0) * 256) +#define CH341_MAX_BPS (CH341_CLKRATE / (CH341_CLK_DIV(3, 0) * 2)) + /* * The device line speed is given by the following equation: * @@ -163,10 +173,9 @@ static const speed_t ch341_min_rates[] = { * 2 <= div <= 256 if fact = 0, or * 9 <= div <= 256 if fact = 1 */ -static int ch341_get_divisor(struct ch341_private *priv) +static int ch341_get_divisor(struct ch341_private *priv, speed_t speed) { unsigned int fact, div, clk_div; - speed_t speed = priv->baud_rate; bool force_fact0 = false; int ps; @@ -174,7 +183,7 @@ static int ch341_get_divisor(struct ch341_private *priv) * Clamp to supported range, this makes the (ps < 0) and (div < 2) * sanity checks below redundant. */ - speed = clamp(speed, 46U, 3000000U); + speed = clamp_val(speed, CH341_MIN_BPS, CH341_MAX_BPS); /* * Start with highest possible base clock (fact = 1) that will give a @@ -229,15 +238,16 @@ static int ch341_get_divisor(struct ch341_private *priv) } static int ch341_set_baudrate_lcr(struct usb_device *dev, - struct ch341_private *priv, u8 lcr) + struct ch341_private *priv, + speed_t baud_rate, u8 lcr) { int val; int r; - if (!priv->baud_rate) + if (!baud_rate) return -EINVAL; - val = ch341_get_divisor(priv); + val = ch341_get_divisor(priv, baud_rate); if (val < 0) return -EINVAL; @@ -247,11 +257,20 @@ static int ch341_set_baudrate_lcr(struct usb_device *dev, */ val |= BIT(7); - r = ch341_control_out(dev, CH341_REQ_WRITE_REG, 0x1312, val); + r = ch341_control_out(dev, CH341_REQ_WRITE_REG, + CH341_REG_DIVISOR << 8 | CH341_REG_PRESCALER, + val); if (r) return r; - r = ch341_control_out(dev, CH341_REQ_WRITE_REG, 0x2518, lcr); + /* + * Chip versions before version 0x30 as read using + * CH341_REQ_READ_VERSION used separate registers for line control + * (stop bits, parity and word length). Version 0x30 and above use + * CH341_REG_LCR only and CH341_REG_LCR2 is always set to zero. + */ + r = ch341_control_out(dev, CH341_REQ_WRITE_REG, + CH341_REG_LCR2 << 8 | CH341_REG_LCR, lcr); if (r) return r; @@ -308,7 +327,7 @@ static int ch341_configure(struct usb_device *dev, struct ch341_private *priv) if (r < 0) goto out; - r = ch341_set_baudrate_lcr(dev, priv, priv->lcr); + r = ch341_set_baudrate_lcr(dev, priv, priv->baud_rate, priv->lcr); if (r < 0) goto out; @@ -341,8 +360,8 @@ static int ch341_detect_quirks(struct usb_serial_port *port) USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, CH341_REG_BREAK, 0, buffer, size, DEFAULT_TIMEOUT); if (r == -EPIPE) { - dev_dbg(&port->dev, "break control not supported\n"); - quirks = CH341_QUIRK_LIMITED_PRESCALER; + dev_info(&port->dev, "break control not supported, using simulated break\n"); + quirks = CH341_QUIRK_LIMITED_PRESCALER | CH341_QUIRK_SIMULATE_BREAK; r = 0; goto out; } @@ -523,7 +542,8 @@ static void ch341_set_termios(struct tty_struct *tty, if (baud_rate) { priv->baud_rate = baud_rate; - r = ch341_set_baudrate_lcr(port->serial->dev, priv, lcr); + r = ch341_set_baudrate_lcr(port->serial->dev, priv, + priv->baud_rate, lcr); if (r < 0 && old_termios) { priv->baud_rate = tty_termios_baud_rate(old_termios); tty_termios_copy_hw(&tty->termios, old_termios); @@ -542,15 +562,98 @@ static void ch341_set_termios(struct tty_struct *tty, ch341_set_handshake(port->serial->dev, priv->mcr); } +/* + * A subset of all CH34x devices don't support a real break condition and + * reading CH341_REG_BREAK fails (see also ch341_detect_quirks). This function + * simulates a break condition by lowering the baud rate to the minimum + * supported by the hardware upon enabling the break condition and sending + * a NUL byte. + * + * Incoming data is corrupted while the break condition is being simulated. + * + * Normally the duration of the break condition can be controlled individually + * by userspace using TIOCSBRK and TIOCCBRK or by passing an argument to + * TCSBRKP. Due to how the simulation is implemented the duration can't be + * controlled. The duration is always about (1s / 46bd * 9bit) = 196ms. + */ +static void ch341_simulate_break(struct tty_struct *tty, int break_state) +{ + struct usb_serial_port *port = tty->driver_data; + struct ch341_private *priv = usb_get_serial_port_data(port); + unsigned long now, delay; + int r; + + if (break_state != 0) { + dev_dbg(&port->dev, "enter break state requested\n"); + + r = ch341_set_baudrate_lcr(port->serial->dev, priv, + CH341_MIN_BPS, + CH341_LCR_ENABLE_RX | CH341_LCR_ENABLE_TX | CH341_LCR_CS8); + if (r < 0) { + dev_err(&port->dev, + "failed to change baud rate to %u: %d\n", + CH341_MIN_BPS, r); + goto restore; + } + + r = tty_put_char(tty, '\0'); + if (r < 0) { + dev_err(&port->dev, + "failed to write NUL byte for simulated break condition: %d\n", + r); + goto restore; + } + + /* + * Compute expected transmission duration including safety + * margin. The original baud rate is only restored after the + * computed point in time. + * + * 11 bits = 1 start, 8 data, 1 stop, 1 margin + */ + priv->break_end = jiffies + (11 * HZ / CH341_MIN_BPS); + + return; + } + + dev_dbg(&port->dev, "leave break state requested\n"); + + now = jiffies; + + if (time_before(now, priv->break_end)) { + /* Wait until NUL byte is written */ + delay = priv->break_end - now; + dev_dbg(&port->dev, + "wait %d ms while transmitting NUL byte at %u baud\n", + jiffies_to_msecs(delay), CH341_MIN_BPS); + schedule_timeout_interruptible(delay); + } + +restore: + /* Restore original baud rate */ + r = ch341_set_baudrate_lcr(port->serial->dev, priv, priv->baud_rate, + priv->lcr); + if (r < 0) + dev_err(&port->dev, + "restoring original baud rate of %u failed: %d\n", + priv->baud_rate, r); +} + static void ch341_break_ctl(struct tty_struct *tty, int break_state) { const uint16_t ch341_break_reg = ((uint16_t) CH341_REG_LCR << 8) | CH341_REG_BREAK; struct usb_serial_port *port = tty->driver_data; + struct ch341_private *priv = usb_get_serial_port_data(port); int r; uint16_t reg_contents; uint8_t *break_reg; + if (priv->quirks & CH341_QUIRK_SIMULATE_BREAK) { + ch341_simulate_break(tty, break_state); + return; + } + break_reg = kmalloc(2, GFP_KERNEL); if (!break_reg) return; diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c index 7d289302ff6c..b97aa40ca4d1 100644 --- a/drivers/usb/serial/console.c +++ b/drivers/usb/serial/console.c @@ -79,7 +79,7 @@ static int usb_console_setup(struct console *co, char *options) if (*s) doflow = (*s++ == 'r'); } - + /* Sane default */ if (baud == 0) baud = 9600; @@ -102,6 +102,9 @@ static int usb_console_setup(struct console *co, char *options) break; } + if (doflow) + cflag |= CRTSCTS; + /* * no need to check the index here: if the index is wrong, console * code won't call us diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index f5143eedbc48..d0c05aa8a0d6 100644 --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -50,6 +50,9 @@ static void cp210x_release(struct usb_serial *); static int cp210x_port_probe(struct usb_serial_port *); static int cp210x_port_remove(struct usb_serial_port *); static void cp210x_dtr_rts(struct usb_serial_port *p, int on); +static void cp210x_process_read_urb(struct urb *urb); +static void cp210x_enable_event_mode(struct usb_serial_port *port); +static void cp210x_disable_event_mode(struct usb_serial_port *port); static const struct usb_device_id id_table[] = { { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ @@ -253,9 +256,21 @@ struct cp210x_serial_private { bool use_actual_rate; }; +enum cp210x_event_state { + ES_DATA, + ES_ESCAPE, + ES_LSR, + ES_LSR_DATA_0, + ES_LSR_DATA_1, + ES_MSR +}; + struct cp210x_port_private { - __u8 bInterfaceNumber; + u8 bInterfaceNumber; bool has_swapped_line_ctl; + bool event_mode; + enum cp210x_event_state event_state; + u8 lsr; }; static struct usb_serial_driver cp210x_device = { @@ -272,14 +287,18 @@ static struct usb_serial_driver cp210x_device = { .break_ctl = cp210x_break_ctl, .set_termios = cp210x_set_termios, .tx_empty = cp210x_tx_empty, + .throttle = usb_serial_generic_throttle, + .unthrottle = usb_serial_generic_unthrottle, .tiocmget = cp210x_tiocmget, .tiocmset = cp210x_tiocmset, + .get_icount = usb_serial_generic_get_icount, .attach = cp210x_attach, .disconnect = cp210x_disconnect, .release = cp210x_release, .port_probe = cp210x_port_probe, .port_remove = cp210x_port_remove, - .dtr_rts = cp210x_dtr_rts + .dtr_rts = cp210x_dtr_rts, + .process_read_urb = cp210x_process_read_urb, }; static struct usb_serial_driver * const serial_drivers[] = { @@ -401,13 +420,22 @@ struct cp210x_comm_status { */ #define PURGE_ALL 0x000f +/* CP210X_EMBED_EVENTS */ +#define CP210X_ESCCHAR 0xec + +#define CP210X_LSR_OVERRUN BIT(1) +#define CP210X_LSR_PARITY BIT(2) +#define CP210X_LSR_FRAME BIT(3) +#define CP210X_LSR_BREAK BIT(4) + + /* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */ struct cp210x_flow_ctl { __le32 ulControlHandshake; __le32 ulFlowReplace; __le32 ulXonLimit; __le32 ulXoffLimit; -} __packed; +}; /* cp210x_flow_ctl::ulControlHandshake */ #define CP210X_SERIAL_DTR_MASK GENMASK(1, 0) @@ -441,7 +469,7 @@ struct cp210x_flow_ctl { struct cp210x_pin_mode { u8 eci; u8 sci; -} __packed; +}; #define CP210X_PIN_MODE_MODEM 0 #define CP210X_PIN_MODE_GPIO BIT(0) @@ -504,7 +532,7 @@ struct cp210x_single_port_config { struct cp210x_gpio_write { u8 mask; u8 state; -} __packed; +}; /* * Helper to get interface number when we only have struct usb_serial. @@ -807,6 +835,7 @@ static int cp210x_get_line_ctl(struct usb_serial_port *port, u16 *ctl) static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) { + struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); int result; result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE); @@ -818,21 +847,144 @@ static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) /* Configure the termios structure */ cp210x_get_termios(tty, port); - /* The baud rate must be initialised on cp2104 */ - if (tty) + if (tty) { + /* The baud rate must be initialised on cp2104 */ cp210x_change_speed(tty, port, NULL); - return usb_serial_generic_open(tty, port); + if (I_INPCK(tty)) + cp210x_enable_event_mode(port); + } + + result = usb_serial_generic_open(tty, port); + if (result) + goto err_disable; + + return 0; + +err_disable: + cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE); + port_priv->event_mode = false; + + return result; } static void cp210x_close(struct usb_serial_port *port) { + struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); + usb_serial_generic_close(port); /* Clear both queues; cp2108 needs this to avoid an occasional hang */ cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL); cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE); + + /* Disabling the interface disables event-insertion mode. */ + port_priv->event_mode = false; +} + +static void cp210x_process_lsr(struct usb_serial_port *port, unsigned char lsr, char *flag) +{ + if (lsr & CP210X_LSR_BREAK) { + port->icount.brk++; + *flag = TTY_BREAK; + } else if (lsr & CP210X_LSR_PARITY) { + port->icount.parity++; + *flag = TTY_PARITY; + } else if (lsr & CP210X_LSR_FRAME) { + port->icount.frame++; + *flag = TTY_FRAME; + } + + if (lsr & CP210X_LSR_OVERRUN) { + port->icount.overrun++; + tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); + } +} + +static bool cp210x_process_char(struct usb_serial_port *port, unsigned char *ch, char *flag) +{ + struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); + + switch (port_priv->event_state) { + case ES_DATA: + if (*ch == CP210X_ESCCHAR) { + port_priv->event_state = ES_ESCAPE; + break; + } + return false; + case ES_ESCAPE: + switch (*ch) { + case 0: + dev_dbg(&port->dev, "%s - escape char\n", __func__); + *ch = CP210X_ESCCHAR; + port_priv->event_state = ES_DATA; + return false; + case 1: + port_priv->event_state = ES_LSR_DATA_0; + break; + case 2: + port_priv->event_state = ES_LSR; + break; + case 3: + port_priv->event_state = ES_MSR; + break; + default: + dev_err(&port->dev, "malformed event 0x%02x\n", *ch); + port_priv->event_state = ES_DATA; + break; + } + break; + case ES_LSR_DATA_0: + port_priv->lsr = *ch; + port_priv->event_state = ES_LSR_DATA_1; + break; + case ES_LSR_DATA_1: + dev_dbg(&port->dev, "%s - lsr = 0x%02x, data = 0x%02x\n", + __func__, port_priv->lsr, *ch); + cp210x_process_lsr(port, port_priv->lsr, flag); + port_priv->event_state = ES_DATA; + return false; + case ES_LSR: + dev_dbg(&port->dev, "%s - lsr = 0x%02x\n", __func__, *ch); + port_priv->lsr = *ch; + cp210x_process_lsr(port, port_priv->lsr, flag); + port_priv->event_state = ES_DATA; + break; + case ES_MSR: + dev_dbg(&port->dev, "%s - msr = 0x%02x\n", __func__, *ch); + /* unimplemented */ + port_priv->event_state = ES_DATA; + break; + } + + return true; +} + +static void cp210x_process_read_urb(struct urb *urb) +{ + struct usb_serial_port *port = urb->context; + struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); + unsigned char *ch = urb->transfer_buffer; + char flag; + int i; + + if (!urb->actual_length) + return; + + if (port_priv->event_mode) { + for (i = 0; i < urb->actual_length; i++, ch++) { + flag = TTY_NORMAL; + + if (cp210x_process_char(port, ch, &flag)) + continue; + + tty_insert_flip_char(&port->port, *ch, flag); + } + } else { + tty_insert_flip_string(&port->port, ch, urb->actual_length); + } + tty_flip_buffer_push(&port->port); } /* @@ -915,6 +1067,7 @@ static void cp210x_get_termios_port(struct usb_serial_port *port, u32 baud; u16 bits; u32 ctl_hs; + u32 flow_repl; cp210x_read_u32_reg(port, CP210X_GET_BAUDRATE, &baud); @@ -1015,6 +1168,22 @@ static void cp210x_get_termios_port(struct usb_serial_port *port, ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake); if (ctl_hs & CP210X_SERIAL_CTS_HANDSHAKE) { dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); + /* + * When the port is closed, the CP210x hardware disables + * auto-RTS and RTS is deasserted but it leaves auto-CTS when + * in hardware flow control mode. When re-opening the port, if + * auto-CTS is enabled on the cp210x, then auto-RTS must be + * re-enabled in the driver. + */ + flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace); + flow_repl &= ~CP210X_SERIAL_RTS_MASK; + flow_repl |= CP210X_SERIAL_RTS_SHIFT(CP210X_SERIAL_RTS_FLOW_CTL); + flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl); + cp210x_write_reg_block(port, + CP210X_SET_FLOW, + &flow_ctl, + sizeof(flow_ctl)); + cflag |= CRTSCTS; } else { dev_dbg(dev, "%s - flow control = NONE\n", __func__); @@ -1148,6 +1317,41 @@ static void cp210x_change_speed(struct tty_struct *tty, tty_encode_baud_rate(tty, baud, baud); } +static void cp210x_enable_event_mode(struct usb_serial_port *port) +{ + struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); + int ret; + + if (port_priv->event_mode) + return; + + port_priv->event_state = ES_DATA; + port_priv->event_mode = true; + + ret = cp210x_write_u16_reg(port, CP210X_EMBED_EVENTS, CP210X_ESCCHAR); + if (ret) { + dev_err(&port->dev, "failed to enable events: %d\n", ret); + port_priv->event_mode = false; + } +} + +static void cp210x_disable_event_mode(struct usb_serial_port *port) +{ + struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); + int ret; + + if (!port_priv->event_mode) + return; + + ret = cp210x_write_u16_reg(port, CP210X_EMBED_EVENTS, 0); + if (ret) { + dev_err(&port->dev, "failed to disable events: %d\n", ret); + return; + } + + port_priv->event_mode = false; +} + static void cp210x_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { @@ -1270,6 +1474,14 @@ static void cp210x_set_termios(struct tty_struct *tty, sizeof(flow_ctl)); } + /* + * Enable event-insertion mode only if input parity checking is + * enabled for now. + */ + if (I_INPCK(tty)) + cp210x_enable_event_mode(port); + else + cp210x_disable_event_mode(port); } static int cp210x_tiocmset(struct tty_struct *tty, diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c index ecda82198798..cc028601c388 100644 --- a/drivers/usb/serial/cypress_m8.c +++ b/drivers/usb/serial/cypress_m8.c @@ -1048,7 +1048,7 @@ static void cypress_read_int_callback(struct urb *urb) return; case -EPIPE: /* Can't call usb_clear_halt while in_interrupt */ - /* FALLS THROUGH */ + fallthrough; default: /* something ugly is going on... */ dev_err(dev, "%s - unexpected nonzero read status received: %d\n", @@ -1197,7 +1197,7 @@ static void cypress_write_int_callback(struct urb *urb) return; case -EPIPE: /* Cannot call usb_clear_halt while in_interrupt */ - /* FALLTHROUGH */ + fallthrough; default: dev_err(dev, "%s - unexpected nonzero write status received: %d\n", __func__, status); diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c index dcda7fb164b4..0c7eacc630e0 100644 --- a/drivers/usb/serial/f81232.c +++ b/drivers/usb/serial/f81232.c @@ -424,7 +424,7 @@ static void f81232_process_read_urb(struct urb *urb) lsr = data[i]; tty_flag = f81232_handle_lsr(port, lsr); - if (port->port.console && port->sysrq) { + if (port->sysrq) { if (usb_serial_handle_sysrq_char(port, data[i + 1])) continue; } @@ -461,7 +461,7 @@ static void f81534a_process_read_urb(struct urb *urb) lsr = data[len - 1]; tty_flag = f81232_handle_lsr(port, lsr); - if (port->port.console && port->sysrq) { + if (port->sysrq) { for (i = 1; i < len - 1; ++i) { if (!usb_serial_handle_sysrq_char(port, data[i])) { tty_insert_flip_char(&port->port, data[i], diff --git a/drivers/usb/serial/f81534.c b/drivers/usb/serial/f81534.c index 2b39bda035c7..5661fd03e545 100644 --- a/drivers/usb/serial/f81534.c +++ b/drivers/usb/serial/f81534.c @@ -1238,7 +1238,7 @@ static void f81534_process_per_serial_block(struct usb_serial_port *port, schedule_work(&port_priv->lsr_work); } - if (port->port.console && port->sysrq) { + if (port->sysrq) { if (usb_serial_handle_sysrq_char(port, data[i])) continue; } diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 9ad44a96dfe3..871cdccf3a5f 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -2480,12 +2480,12 @@ static int ftdi_prepare_write_buffer(struct usb_serial_port *port, #define FTDI_RS_ERR_MASK (FTDI_RS_BI | FTDI_RS_PE | FTDI_RS_FE | FTDI_RS_OE) static int ftdi_process_packet(struct usb_serial_port *port, - struct ftdi_private *priv, char *packet, int len) + struct ftdi_private *priv, unsigned char *buf, int len) { + unsigned char status; + bool brkint = false; int i; - char status; char flag; - char *ch; if (len < 2) { dev_dbg(&port->dev, "malformed packet\n"); @@ -2495,7 +2495,7 @@ static int ftdi_process_packet(struct usb_serial_port *port, /* Compare new line status to the old one, signal if different/ N.B. packet may be processed more than once, but differences are only processed once. */ - status = packet[0] & FTDI_STATUS_B0_MASK; + status = buf[0] & FTDI_STATUS_B0_MASK; if (status != priv->prev_status) { char diff_status = status ^ priv->prev_status; @@ -2521,13 +2521,12 @@ static int ftdi_process_packet(struct usb_serial_port *port, } /* save if the transmitter is empty or not */ - if (packet[1] & FTDI_RS_TEMT) + if (buf[1] & FTDI_RS_TEMT) priv->transmit_empty = 1; else priv->transmit_empty = 0; - len -= 2; - if (!len) + if (len == 2) return 0; /* status only */ /* @@ -2535,47 +2534,57 @@ static int ftdi_process_packet(struct usb_serial_port *port, * data payload to avoid over-reporting. */ flag = TTY_NORMAL; - if (packet[1] & FTDI_RS_ERR_MASK) { - /* Break takes precedence over parity, which takes precedence - * over framing errors */ - if (packet[1] & FTDI_RS_BI) { - flag = TTY_BREAK; + if (buf[1] & FTDI_RS_ERR_MASK) { + /* + * Break takes precedence over parity, which takes precedence + * over framing errors. Note that break is only associated + * with the last character in the buffer and only when it's a + * NUL. + */ + if (buf[1] & FTDI_RS_BI && buf[len - 1] == '\0') { port->icount.brk++; - usb_serial_handle_break(port); - } else if (packet[1] & FTDI_RS_PE) { + brkint = true; + } + if (buf[1] & FTDI_RS_PE) { flag = TTY_PARITY; port->icount.parity++; - } else if (packet[1] & FTDI_RS_FE) { + } else if (buf[1] & FTDI_RS_FE) { flag = TTY_FRAME; port->icount.frame++; } /* Overrun is special, not associated with a char */ - if (packet[1] & FTDI_RS_OE) { + if (buf[1] & FTDI_RS_OE) { port->icount.overrun++; tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); } } - port->icount.rx += len; - ch = packet + 2; + port->icount.rx += len - 2; - if (port->port.console && port->sysrq) { - for (i = 0; i < len; i++, ch++) { - if (!usb_serial_handle_sysrq_char(port, *ch)) - tty_insert_flip_char(&port->port, *ch, flag); + if (brkint || port->sysrq) { + for (i = 2; i < len; i++) { + if (brkint && i == len - 1) { + if (usb_serial_handle_break(port)) + return len - 3; + flag = TTY_BREAK; + } + if (usb_serial_handle_sysrq_char(port, buf[i])) + continue; + tty_insert_flip_char(&port->port, buf[i], flag); } } else { - tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len); + tty_insert_flip_string_fixed_flag(&port->port, buf + 2, flag, + len - 2); } - return len; + return len - 2; } static void ftdi_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; struct ftdi_private *priv = usb_get_serial_port_data(port); - char *data = (char *)urb->transfer_buffer; + char *data = urb->transfer_buffer; int i; int len; int count = 0; diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c index d63072fee099..c02c19bb1183 100644 --- a/drivers/usb/serial/garmin_gps.c +++ b/drivers/usb/serial/garmin_gps.c @@ -179,19 +179,22 @@ static unsigned char const GARMIN_START_SESSION_REPLY[] = { 0, 0, 0, 0, 6, 0, 0, 0, 4, 0, 0, 0 }; static unsigned char const GARMIN_BULK_IN_AVAIL_REPLY[] = { 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 }; +static unsigned char const GARMIN_STOP_TRANSFER_REQ[] + = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 0, 0 }; +static unsigned char const GARMIN_STOP_TRANSFER_REQ_V2[] + = { 20, 0, 0, 0, 10, 0, 0, 0, 1, 0, 0, 0, 0 }; + +/* packets currently unused, left as documentation */ +#if 0 static unsigned char const GARMIN_APP_LAYER_REPLY[] = { 0x14, 0, 0, 0 }; static unsigned char const GARMIN_START_PVT_REQ[] = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 49, 0 }; static unsigned char const GARMIN_STOP_PVT_REQ[] = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 50, 0 }; -static unsigned char const GARMIN_STOP_TRANSFER_REQ[] - = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 0, 0 }; -static unsigned char const GARMIN_STOP_TRANSFER_REQ_V2[] - = { 20, 0, 0, 0, 10, 0, 0, 0, 1, 0, 0, 0, 0 }; static unsigned char const PRIVATE_REQ[] = { 0x4B, 0x6E, 0x10, 0x01, 0xFF, 0, 0, 0, 0xFF, 0, 0, 0 }; - +#endif static const struct usb_device_id id_table[] = { diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c index 5cdf180cda23..d10aa3d2ee49 100644 --- a/drivers/usb/serial/generic.c +++ b/drivers/usb/serial/generic.c @@ -345,7 +345,7 @@ EXPORT_SYMBOL_GPL(usb_serial_generic_submit_read_urbs); void usb_serial_generic_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; - char *ch = (char *)urb->transfer_buffer; + char *ch = urb->transfer_buffer; int i; if (!urb->actual_length) @@ -355,13 +355,13 @@ void usb_serial_generic_process_read_urb(struct urb *urb) * stuff like 3G modems, so shortcircuit it in the 99.9999999% of * cases where the USB serial is not a console anyway. */ - if (!port->port.console || !port->sysrq) { - tty_insert_flip_string(&port->port, ch, urb->actual_length); - } else { + if (port->sysrq) { for (i = 0; i < urb->actual_length; i++, ch++) { if (!usb_serial_handle_sysrq_char(port, *ch)) tty_insert_flip_char(&port->port, *ch, TTY_NORMAL); } + } else { + tty_insert_flip_string(&port->port, ch, urb->actual_length); } tty_flip_buffer_push(&port->port); } @@ -571,10 +571,10 @@ int usb_serial_generic_get_icount(struct tty_struct *tty, } EXPORT_SYMBOL_GPL(usb_serial_generic_get_icount); -#ifdef CONFIG_MAGIC_SYSRQ +#if defined(CONFIG_USB_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch) { - if (port->sysrq && port->port.console) { + if (port->sysrq) { if (ch && time_before(jiffies, port->sysrq)) { handle_sysrq(ch); port->sysrq = 0; @@ -584,16 +584,13 @@ int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch) } return 0; } -#else -int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch) -{ - return 0; -} -#endif EXPORT_SYMBOL_GPL(usb_serial_handle_sysrq_char); int usb_serial_handle_break(struct usb_serial_port *port) { + if (!port->port.console) + return 0; + if (!port->sysrq) { port->sysrq = jiffies + HZ*5; return 1; @@ -602,6 +599,7 @@ int usb_serial_handle_break(struct usb_serial_port *port) return 0; } EXPORT_SYMBOL_GPL(usb_serial_handle_break); +#endif /** * usb_serial_handle_dcd_change - handle a change of carrier detect state diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index 4cca0b836f43..ba5d8df69518 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -1752,7 +1752,7 @@ static void process_rcvd_data(struct edgeport_serial *ed |