Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 1 | /* |
| 2 | * usb-serial driver for Quatech USB 2 devices |
| 3 | * |
Bill Pemberton | f88e6a3 | 2012-05-10 16:57:39 -0400 | [diff] [blame] | 4 | * Copyright (C) 2012 Bill Pemberton (wfp5p@virginia.edu) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License version 2 |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 10 | * |
| 11 | * These devices all have only 1 bulk in and 1 bulk out that is shared |
| 12 | * for all serial ports. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <asm/unaligned.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/tty.h> |
| 21 | #include <linux/tty_driver.h> |
| 22 | #include <linux/tty_flip.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/serial.h> |
| 25 | #include <linux/usb.h> |
| 26 | #include <linux/usb/serial.h> |
| 27 | #include <linux/serial_reg.h> |
| 28 | #include <linux/uaccess.h> |
| 29 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 30 | /* default urb timeout for usb operations */ |
| 31 | #define QT2_USB_TIMEOUT USB_CTRL_SET_TIMEOUT |
| 32 | |
| 33 | #define QT_OPEN_CLOSE_CHANNEL 0xca |
| 34 | #define QT_SET_GET_DEVICE 0xc2 |
| 35 | #define QT_SET_GET_REGISTER 0xc0 |
| 36 | #define QT_GET_SET_PREBUF_TRIG_LVL 0xcc |
| 37 | #define QT_SET_ATF 0xcd |
| 38 | #define QT_TRANSFER_IN 0xc0 |
| 39 | #define QT_HW_FLOW_CONTROL_MASK 0xc5 |
| 40 | #define QT_SW_FLOW_CONTROL_MASK 0xc6 |
| 41 | #define QT2_BREAK_CONTROL 0xc8 |
| 42 | #define QT2_GET_SET_UART 0xc1 |
| 43 | #define QT2_FLUSH_DEVICE 0xc4 |
| 44 | #define QT2_GET_SET_QMCR 0xe1 |
| 45 | #define QT2_QMCR_RS232 0x40 |
| 46 | #define QT2_QMCR_RS422 0x10 |
| 47 | |
| 48 | #define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS) |
| 49 | |
| 50 | #define SERIAL_EVEN_PARITY (UART_LCR_PARITY | UART_LCR_EPAR) |
| 51 | |
| 52 | /* status bytes for the device */ |
| 53 | #define QT2_CONTROL_BYTE 0x1b |
| 54 | #define QT2_LINE_STATUS 0x00 /* following 1 byte is line status */ |
| 55 | #define QT2_MODEM_STATUS 0x01 /* following 1 byte is modem status */ |
| 56 | #define QT2_XMIT_HOLD 0x02 /* following 2 bytes are ?? */ |
| 57 | #define QT2_CHANGE_PORT 0x03 /* following 1 byte is port to change to */ |
| 58 | #define QT2_REC_FLUSH 0x04 /* no following info */ |
| 59 | #define QT2_XMIT_FLUSH 0x05 /* no following info */ |
| 60 | #define QT2_CONTROL_ESCAPE 0xff /* pass through previous 2 control bytes */ |
| 61 | |
| 62 | #define MAX_BAUD_RATE 921600 |
| 63 | #define DEFAULT_BAUD_RATE 9600 |
| 64 | |
Johan Hovold | 0448067 | 2013-08-13 13:27:38 +0200 | [diff] [blame] | 65 | #define QT2_READ_BUFFER_SIZE 512 /* size of read buffer */ |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 66 | #define QT2_WRITE_BUFFER_SIZE 512 /* size of write buffer */ |
| 67 | #define QT2_WRITE_CONTROL_SIZE 5 /* control bytes used for a write */ |
| 68 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 69 | #define DRIVER_DESC "Quatech 2nd gen USB to Serial Driver" |
| 70 | |
| 71 | #define USB_VENDOR_ID_QUATECH 0x061d |
| 72 | #define QUATECH_SSU2_100 0xC120 /* RS232 single port */ |
| 73 | #define QUATECH_DSU2_100 0xC140 /* RS232 dual port */ |
| 74 | #define QUATECH_DSU2_400 0xC150 /* RS232/422/485 dual port */ |
| 75 | #define QUATECH_QSU2_100 0xC160 /* RS232 four port */ |
| 76 | #define QUATECH_QSU2_400 0xC170 /* RS232/422/485 four port */ |
| 77 | #define QUATECH_ESU2_100 0xC1A0 /* RS232 eight port */ |
| 78 | #define QUATECH_ESU2_400 0xC180 /* RS232/422/485 eight port */ |
| 79 | |
| 80 | struct qt2_device_detail { |
| 81 | int product_id; |
| 82 | int num_ports; |
| 83 | }; |
| 84 | |
| 85 | #define QT_DETAILS(prod, ports) \ |
| 86 | .product_id = (prod), \ |
| 87 | .num_ports = (ports) |
| 88 | |
| 89 | static const struct qt2_device_detail qt2_device_details[] = { |
| 90 | {QT_DETAILS(QUATECH_SSU2_100, 1)}, |
| 91 | {QT_DETAILS(QUATECH_DSU2_400, 2)}, |
| 92 | {QT_DETAILS(QUATECH_DSU2_100, 2)}, |
| 93 | {QT_DETAILS(QUATECH_QSU2_400, 4)}, |
| 94 | {QT_DETAILS(QUATECH_QSU2_100, 4)}, |
| 95 | {QT_DETAILS(QUATECH_ESU2_400, 8)}, |
| 96 | {QT_DETAILS(QUATECH_ESU2_100, 8)}, |
| 97 | {QT_DETAILS(0, 0)} /* Terminating entry */ |
| 98 | }; |
| 99 | |
| 100 | static const struct usb_device_id id_table[] = { |
| 101 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU2_100)}, |
| 102 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_100)}, |
| 103 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_400)}, |
| 104 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_100)}, |
| 105 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_400)}, |
| 106 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_100)}, |
| 107 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_400)}, |
| 108 | {} /* Terminating entry */ |
| 109 | }; |
| 110 | MODULE_DEVICE_TABLE(usb, id_table); |
| 111 | |
| 112 | struct qt2_serial_private { |
| 113 | unsigned char current_port; /* current port for incoming data */ |
| 114 | |
| 115 | struct urb *read_urb; /* shared among all ports */ |
Johan Hovold | 0448067 | 2013-08-13 13:27:38 +0200 | [diff] [blame] | 116 | char *read_buffer; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 117 | }; |
| 118 | |
| 119 | struct qt2_port_private { |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 120 | u8 device_port; |
| 121 | |
| 122 | spinlock_t urb_lock; |
| 123 | bool urb_in_use; |
| 124 | struct urb *write_urb; |
Johan Hovold | cbf30a9 | 2013-08-13 13:27:39 +0200 | [diff] [blame] | 125 | char *write_buffer; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 126 | |
| 127 | spinlock_t lock; |
| 128 | u8 shadowLSR; |
| 129 | u8 shadowMSR; |
| 130 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 131 | struct usb_serial_port *port; |
| 132 | }; |
| 133 | |
| 134 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch); |
| 135 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch); |
| 136 | static void qt2_write_bulk_callback(struct urb *urb); |
| 137 | static void qt2_read_bulk_callback(struct urb *urb); |
| 138 | |
| 139 | static void qt2_release(struct usb_serial *serial) |
| 140 | { |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 141 | struct qt2_serial_private *serial_priv; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 142 | |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 143 | serial_priv = usb_get_serial_data(serial); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 144 | |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 145 | usb_free_urb(serial_priv->read_urb); |
Johan Hovold | 0448067 | 2013-08-13 13:27:38 +0200 | [diff] [blame] | 146 | kfree(serial_priv->read_buffer); |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 147 | kfree(serial_priv); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | static inline int calc_baud_divisor(int baudrate) |
| 151 | { |
| 152 | int divisor, rem; |
| 153 | |
| 154 | divisor = MAX_BAUD_RATE / baudrate; |
| 155 | rem = MAX_BAUD_RATE % baudrate; |
| 156 | /* Round to nearest divisor */ |
| 157 | if (((rem * 2) >= baudrate) && (baudrate != 110)) |
| 158 | divisor++; |
| 159 | |
| 160 | return divisor; |
| 161 | } |
| 162 | |
| 163 | static inline int qt2_set_port_config(struct usb_device *dev, |
| 164 | unsigned char port_number, |
| 165 | u16 baudrate, u16 lcr) |
| 166 | { |
| 167 | int divisor = calc_baud_divisor(baudrate); |
| 168 | u16 index = ((u16) (lcr << 8) | (u16) (port_number)); |
| 169 | |
| 170 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| 171 | QT2_GET_SET_UART, 0x40, |
| 172 | divisor, index, NULL, 0, QT2_USB_TIMEOUT); |
| 173 | } |
| 174 | |
| 175 | static inline int qt2_control_msg(struct usb_device *dev, |
| 176 | u8 request, u16 data, u16 index) |
| 177 | { |
| 178 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| 179 | request, 0x40, data, index, |
| 180 | NULL, 0, QT2_USB_TIMEOUT); |
| 181 | } |
| 182 | |
| 183 | static inline int qt2_setdevice(struct usb_device *dev, u8 *data) |
| 184 | { |
| 185 | u16 x = ((u16) (data[1] << 8) | (u16) (data[0])); |
| 186 | |
| 187 | return qt2_control_msg(dev, QT_SET_GET_DEVICE, x, 0); |
| 188 | } |
| 189 | |
| 190 | |
| 191 | static inline int qt2_getdevice(struct usb_device *dev, u8 *data) |
| 192 | { |
| 193 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| 194 | QT_SET_GET_DEVICE, 0xc0, 0, 0, |
| 195 | data, 3, QT2_USB_TIMEOUT); |
| 196 | } |
| 197 | |
| 198 | static inline int qt2_getregister(struct usb_device *dev, |
| 199 | u8 uart, |
| 200 | u8 reg, |
| 201 | u8 *data) |
| 202 | { |
| 203 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| 204 | QT_SET_GET_REGISTER, 0xc0, reg, |
| 205 | uart, data, sizeof(*data), QT2_USB_TIMEOUT); |
| 206 | |
| 207 | } |
| 208 | |
| 209 | static inline int qt2_setregister(struct usb_device *dev, |
| 210 | u8 uart, u8 reg, u16 data) |
| 211 | { |
| 212 | u16 value = (data << 8) | reg; |
| 213 | |
| 214 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| 215 | QT_SET_GET_REGISTER, 0x40, value, uart, |
| 216 | NULL, 0, QT2_USB_TIMEOUT); |
| 217 | } |
| 218 | |
| 219 | static inline int update_mctrl(struct qt2_port_private *port_priv, |
| 220 | unsigned int set, unsigned int clear) |
| 221 | { |
| 222 | struct usb_serial_port *port = port_priv->port; |
| 223 | struct usb_device *dev = port->serial->dev; |
| 224 | unsigned urb_value; |
| 225 | int status; |
| 226 | |
| 227 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { |
| 228 | dev_dbg(&port->dev, |
| 229 | "update_mctrl - DTR|RTS not being set|cleared\n"); |
| 230 | return 0; /* no change */ |
| 231 | } |
| 232 | |
| 233 | clear &= ~set; /* 'set' takes precedence over 'clear' */ |
| 234 | urb_value = 0; |
| 235 | if (set & TIOCM_DTR) |
| 236 | urb_value |= UART_MCR_DTR; |
| 237 | if (set & TIOCM_RTS) |
| 238 | urb_value |= UART_MCR_RTS; |
| 239 | |
| 240 | status = qt2_setregister(dev, port_priv->device_port, UART_MCR, |
| 241 | urb_value); |
| 242 | if (status < 0) |
| 243 | dev_err(&port->dev, |
| 244 | "update_mctrl - Error from MODEM_CTRL urb: %i\n", |
| 245 | status); |
| 246 | return status; |
| 247 | } |
| 248 | |
| 249 | static int qt2_calc_num_ports(struct usb_serial *serial) |
| 250 | { |
| 251 | struct qt2_device_detail d; |
| 252 | int i; |
| 253 | |
| 254 | for (i = 0; d = qt2_device_details[i], d.product_id != 0; i++) { |
| 255 | if (d.product_id == le16_to_cpu(serial->dev->descriptor.idProduct)) |
| 256 | return d.num_ports; |
| 257 | } |
| 258 | |
| 259 | /* we didn't recognize the device */ |
| 260 | dev_err(&serial->dev->dev, |
| 261 | "don't know the number of ports, assuming 1\n"); |
| 262 | |
| 263 | return 1; |
| 264 | } |
| 265 | |
| 266 | static void qt2_set_termios(struct tty_struct *tty, |
| 267 | struct usb_serial_port *port, |
| 268 | struct ktermios *old_termios) |
| 269 | { |
| 270 | struct usb_device *dev = port->serial->dev; |
| 271 | struct qt2_port_private *port_priv; |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 272 | struct ktermios *termios = &tty->termios; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 273 | u16 baud; |
| 274 | unsigned int cflag = termios->c_cflag; |
| 275 | u16 new_lcr = 0; |
| 276 | int status; |
| 277 | |
| 278 | port_priv = usb_get_serial_port_data(port); |
| 279 | |
| 280 | if (cflag & PARENB) { |
| 281 | if (cflag & PARODD) |
| 282 | new_lcr |= UART_LCR_PARITY; |
| 283 | else |
| 284 | new_lcr |= SERIAL_EVEN_PARITY; |
| 285 | } |
| 286 | |
| 287 | switch (cflag & CSIZE) { |
| 288 | case CS5: |
| 289 | new_lcr |= UART_LCR_WLEN5; |
| 290 | break; |
| 291 | case CS6: |
| 292 | new_lcr |= UART_LCR_WLEN6; |
| 293 | break; |
| 294 | case CS7: |
| 295 | new_lcr |= UART_LCR_WLEN7; |
| 296 | break; |
| 297 | default: |
| 298 | case CS8: |
| 299 | new_lcr |= UART_LCR_WLEN8; |
| 300 | break; |
| 301 | } |
| 302 | |
| 303 | baud = tty_get_baud_rate(tty); |
| 304 | if (!baud) |
| 305 | baud = 9600; |
| 306 | |
| 307 | status = qt2_set_port_config(dev, port_priv->device_port, baud, |
| 308 | new_lcr); |
| 309 | if (status < 0) |
| 310 | dev_err(&port->dev, "%s - qt2_set_port_config failed: %i\n", |
| 311 | __func__, status); |
| 312 | |
| 313 | if (cflag & CRTSCTS) |
| 314 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, |
| 315 | SERIAL_CRTSCTS, |
| 316 | port_priv->device_port); |
| 317 | else |
| 318 | status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, |
| 319 | 0, port_priv->device_port); |
| 320 | if (status < 0) |
| 321 | dev_err(&port->dev, "%s - set HW flow control failed: %i\n", |
| 322 | __func__, status); |
| 323 | |
| 324 | if (I_IXOFF(tty) || I_IXON(tty)) { |
| 325 | u16 x = ((u16) (START_CHAR(tty) << 8) | (u16) (STOP_CHAR(tty))); |
| 326 | |
| 327 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, |
| 328 | x, port_priv->device_port); |
| 329 | } else |
| 330 | status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, |
| 331 | 0, port_priv->device_port); |
| 332 | |
| 333 | if (status < 0) |
| 334 | dev_err(&port->dev, "%s - set SW flow control failed: %i\n", |
| 335 | __func__, status); |
| 336 | |
| 337 | } |
| 338 | |
| 339 | static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port) |
| 340 | { |
| 341 | struct usb_serial *serial; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 342 | struct qt2_port_private *port_priv; |
| 343 | u8 *data; |
| 344 | u16 device_port; |
| 345 | int status; |
| 346 | unsigned long flags; |
| 347 | |
Greg Kroah-Hartman | 1143832 | 2013-06-06 10:32:00 -0700 | [diff] [blame] | 348 | device_port = port->port_number; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 349 | |
| 350 | serial = port->serial; |
| 351 | |
| 352 | port_priv = usb_get_serial_port_data(port); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 353 | |
| 354 | /* set the port to RS232 mode */ |
| 355 | status = qt2_control_msg(serial->dev, QT2_GET_SET_QMCR, |
| 356 | QT2_QMCR_RS232, device_port); |
| 357 | if (status < 0) { |
| 358 | dev_err(&port->dev, |
| 359 | "%s failed to set RS232 mode for port %i error %i\n", |
| 360 | __func__, device_port, status); |
| 361 | return status; |
| 362 | } |
| 363 | |
| 364 | data = kzalloc(2, GFP_KERNEL); |
| 365 | if (!data) |
| 366 | return -ENOMEM; |
| 367 | |
| 368 | /* open the port */ |
| 369 | status = usb_control_msg(serial->dev, |
| 370 | usb_rcvctrlpipe(serial->dev, 0), |
| 371 | QT_OPEN_CLOSE_CHANNEL, |
| 372 | 0xc0, 0, |
| 373 | device_port, data, 2, QT2_USB_TIMEOUT); |
| 374 | |
| 375 | if (status < 0) { |
| 376 | dev_err(&port->dev, "%s - open port failed %i", __func__, |
| 377 | status); |
| 378 | kfree(data); |
| 379 | return status; |
| 380 | } |
| 381 | |
| 382 | spin_lock_irqsave(&port_priv->lock, flags); |
| 383 | port_priv->shadowLSR = data[0]; |
| 384 | port_priv->shadowMSR = data[1]; |
| 385 | spin_unlock_irqrestore(&port_priv->lock, flags); |
| 386 | |
| 387 | kfree(data); |
| 388 | |
| 389 | /* set to default speed and 8bit word size */ |
| 390 | status = qt2_set_port_config(serial->dev, device_port, |
| 391 | DEFAULT_BAUD_RATE, UART_LCR_WLEN8); |
| 392 | if (status < 0) { |
Greg Kroah-Hartman | 1143832 | 2013-06-06 10:32:00 -0700 | [diff] [blame] | 393 | dev_err(&port->dev, "%s - initial setup failed (%i)\n", |
| 394 | __func__, device_port); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 395 | return status; |
| 396 | } |
| 397 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 398 | port_priv->device_port = (u8) device_port; |
| 399 | |
| 400 | if (tty) |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 401 | qt2_set_termios(tty, port, &tty->termios); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 402 | |
| 403 | return 0; |
| 404 | |
| 405 | } |
| 406 | |
| 407 | static void qt2_close(struct usb_serial_port *port) |
| 408 | { |
| 409 | struct usb_serial *serial; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 410 | struct qt2_port_private *port_priv; |
| 411 | unsigned long flags; |
| 412 | int i; |
| 413 | |
| 414 | serial = port->serial; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 415 | port_priv = usb_get_serial_port_data(port); |
| 416 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 417 | spin_lock_irqsave(&port_priv->urb_lock, flags); |
Johan Hovold | 8e512ab | 2012-10-25 10:29:09 +0200 | [diff] [blame] | 418 | usb_kill_urb(port_priv->write_urb); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 419 | port_priv->urb_in_use = false; |
| 420 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); |
| 421 | |
| 422 | /* flush the port transmit buffer */ |
| 423 | i = usb_control_msg(serial->dev, |
| 424 | usb_rcvctrlpipe(serial->dev, 0), |
| 425 | QT2_FLUSH_DEVICE, 0x40, 1, |
| 426 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); |
| 427 | |
| 428 | if (i < 0) |
| 429 | dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n", |
| 430 | __func__, i); |
| 431 | |
| 432 | /* flush the port receive buffer */ |
| 433 | i = usb_control_msg(serial->dev, |
| 434 | usb_rcvctrlpipe(serial->dev, 0), |
| 435 | QT2_FLUSH_DEVICE, 0x40, 0, |
| 436 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); |
| 437 | |
| 438 | if (i < 0) |
| 439 | dev_err(&port->dev, "%s - receive buffer flush failed: %i\n", |
| 440 | __func__, i); |
| 441 | |
| 442 | /* close the port */ |
| 443 | i = usb_control_msg(serial->dev, |
| 444 | usb_sndctrlpipe(serial->dev, 0), |
| 445 | QT_OPEN_CLOSE_CHANNEL, |
| 446 | 0x40, 0, |
| 447 | port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT); |
| 448 | |
| 449 | if (i < 0) |
| 450 | dev_err(&port->dev, "%s - close port failed %i\n", |
| 451 | __func__, i); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | static void qt2_disconnect(struct usb_serial *serial) |
| 455 | { |
| 456 | struct qt2_serial_private *serial_priv = usb_get_serial_data(serial); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 457 | |
Johan Hovold | 8e512ab | 2012-10-25 10:29:09 +0200 | [diff] [blame] | 458 | usb_kill_urb(serial_priv->read_urb); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | static int get_serial_info(struct usb_serial_port *port, |
| 462 | struct serial_struct __user *retinfo) |
| 463 | { |
| 464 | struct serial_struct tmp; |
| 465 | |
| 466 | if (!retinfo) |
| 467 | return -EFAULT; |
| 468 | |
| 469 | memset(&tmp, 0, sizeof(tmp)); |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 470 | tmp.line = port->minor; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 471 | tmp.port = 0; |
| 472 | tmp.irq = 0; |
| 473 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; |
| 474 | tmp.xmit_fifo_size = port->bulk_out_size; |
| 475 | tmp.baud_base = 9600; |
| 476 | tmp.close_delay = 5*HZ; |
| 477 | tmp.closing_wait = 30*HZ; |
| 478 | |
| 479 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) |
| 480 | return -EFAULT; |
| 481 | return 0; |
| 482 | } |
| 483 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 484 | static int qt2_ioctl(struct tty_struct *tty, |
| 485 | unsigned int cmd, unsigned long arg) |
| 486 | { |
| 487 | struct usb_serial_port *port = tty->driver_data; |
| 488 | |
| 489 | switch (cmd) { |
| 490 | case TIOCGSERIAL: |
| 491 | return get_serial_info(port, |
| 492 | (struct serial_struct __user *)arg); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 493 | default: |
| 494 | break; |
| 495 | } |
| 496 | |
| 497 | return -ENOIOCTLCMD; |
| 498 | } |
| 499 | |
| 500 | static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch) |
| 501 | { |
| 502 | switch (*ch) { |
| 503 | case QT2_LINE_STATUS: |
| 504 | qt2_update_lsr(port, ch + 1); |
| 505 | break; |
| 506 | case QT2_MODEM_STATUS: |
| 507 | qt2_update_msr(port, ch + 1); |
| 508 | break; |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | /* not needed, kept to document functionality */ |
| 513 | static void qt2_process_xmit_empty(struct usb_serial_port *port, |
| 514 | unsigned char *ch) |
| 515 | { |
| 516 | int bytes_written; |
| 517 | |
| 518 | bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4); |
| 519 | } |
| 520 | |
| 521 | /* not needed, kept to document functionality */ |
| 522 | static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch) |
| 523 | { |
| 524 | return; |
| 525 | } |
| 526 | |
Sachin Kamat | 0e35789 | 2013-05-13 10:35:20 +0530 | [diff] [blame] | 527 | static void qt2_process_read_urb(struct urb *urb) |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 528 | { |
| 529 | struct usb_serial *serial; |
| 530 | struct qt2_serial_private *serial_priv; |
| 531 | struct usb_serial_port *port; |
| 532 | struct qt2_port_private *port_priv; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 533 | bool escapeflag; |
| 534 | unsigned char *ch; |
| 535 | int i; |
| 536 | unsigned char newport; |
| 537 | int len = urb->actual_length; |
| 538 | |
| 539 | if (!len) |
| 540 | return; |
| 541 | |
| 542 | ch = urb->transfer_buffer; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 543 | serial = urb->context; |
| 544 | serial_priv = usb_get_serial_data(serial); |
| 545 | port = serial->port[serial_priv->current_port]; |
| 546 | port_priv = usb_get_serial_port_data(port); |
| 547 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 548 | for (i = 0; i < urb->actual_length; i++) { |
| 549 | ch = (unsigned char *)urb->transfer_buffer + i; |
| 550 | if ((i <= (len - 3)) && |
| 551 | (*ch == QT2_CONTROL_BYTE) && |
| 552 | (*(ch + 1) == QT2_CONTROL_BYTE)) { |
| 553 | escapeflag = false; |
| 554 | switch (*(ch + 2)) { |
| 555 | case QT2_LINE_STATUS: |
| 556 | case QT2_MODEM_STATUS: |
| 557 | if (i > (len - 4)) { |
| 558 | dev_warn(&port->dev, |
| 559 | "%s - status message too short\n", |
| 560 | __func__); |
| 561 | break; |
| 562 | } |
| 563 | qt2_process_status(port, ch + 2); |
| 564 | i += 3; |
| 565 | escapeflag = true; |
| 566 | break; |
| 567 | case QT2_XMIT_HOLD: |
| 568 | if (i > (len - 5)) { |
| 569 | dev_warn(&port->dev, |
| 570 | "%s - xmit_empty message too short\n", |
| 571 | __func__); |
| 572 | break; |
| 573 | } |
| 574 | qt2_process_xmit_empty(port, ch + 3); |
| 575 | i += 4; |
| 576 | escapeflag = true; |
| 577 | break; |
| 578 | case QT2_CHANGE_PORT: |
| 579 | if (i > (len - 4)) { |
| 580 | dev_warn(&port->dev, |
| 581 | "%s - change_port message too short\n", |
| 582 | __func__); |
| 583 | break; |
| 584 | } |
Greg Kroah-Hartman | 2be818a | 2013-03-21 16:07:57 -0700 | [diff] [blame] | 585 | tty_flip_buffer_push(&port->port); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 586 | |
| 587 | newport = *(ch + 3); |
| 588 | |
| 589 | if (newport > serial->num_ports) { |
| 590 | dev_err(&port->dev, |
| 591 | "%s - port change to invalid port: %i\n", |
| 592 | __func__, newport); |
| 593 | break; |
| 594 | } |
| 595 | |
| 596 | serial_priv->current_port = newport; |
| 597 | port = serial->port[serial_priv->current_port]; |
| 598 | port_priv = usb_get_serial_port_data(port); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 599 | i += 3; |
| 600 | escapeflag = true; |
| 601 | break; |
| 602 | case QT2_REC_FLUSH: |
| 603 | case QT2_XMIT_FLUSH: |
| 604 | qt2_process_flush(port, ch + 2); |
| 605 | i += 2; |
| 606 | escapeflag = true; |
| 607 | break; |
| 608 | case QT2_CONTROL_ESCAPE: |
Jiri Slaby | 227434f | 2013-01-03 15:53:01 +0100 | [diff] [blame] | 609 | tty_buffer_request_room(&port->port, 2); |
Jiri Slaby | 05c7cd3 | 2013-01-03 15:53:04 +0100 | [diff] [blame] | 610 | tty_insert_flip_string(&port->port, ch, 2); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 611 | i += 2; |
| 612 | escapeflag = true; |
| 613 | break; |
| 614 | default: |
| 615 | dev_warn(&port->dev, |
| 616 | "%s - unsupported command %i\n", |
| 617 | __func__, *(ch + 2)); |
| 618 | break; |
| 619 | } |
| 620 | if (escapeflag) |
| 621 | continue; |
| 622 | } |
| 623 | |
Jiri Slaby | 05c7cd3 | 2013-01-03 15:53:04 +0100 | [diff] [blame] | 624 | tty_buffer_request_room(&port->port, 1); |
| 625 | tty_insert_flip_string(&port->port, ch, 1); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 626 | } |
| 627 | |
Greg Kroah-Hartman | 2be818a | 2013-03-21 16:07:57 -0700 | [diff] [blame] | 628 | tty_flip_buffer_push(&port->port); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | static void qt2_write_bulk_callback(struct urb *urb) |
| 632 | { |
| 633 | struct usb_serial_port *port; |
| 634 | struct qt2_port_private *port_priv; |
| 635 | |
| 636 | port = urb->context; |
| 637 | port_priv = usb_get_serial_port_data(port); |
| 638 | |
| 639 | spin_lock(&port_priv->urb_lock); |
| 640 | |
| 641 | port_priv->urb_in_use = false; |
| 642 | usb_serial_port_softint(port); |
| 643 | |
| 644 | spin_unlock(&port_priv->urb_lock); |
| 645 | |
| 646 | } |
| 647 | |
| 648 | static void qt2_read_bulk_callback(struct urb *urb) |
| 649 | { |
| 650 | struct usb_serial *serial = urb->context; |
| 651 | int status; |
| 652 | |
| 653 | if (urb->status) { |
| 654 | dev_warn(&serial->dev->dev, |
| 655 | "%s - non-zero urb status: %i\n", __func__, |
| 656 | urb->status); |
| 657 | return; |
| 658 | } |
| 659 | |
| 660 | qt2_process_read_urb(urb); |
| 661 | |
| 662 | status = usb_submit_urb(urb, GFP_ATOMIC); |
| 663 | if (status != 0) |
| 664 | dev_err(&serial->dev->dev, |
| 665 | "%s - resubmit read urb failed: %i\n", |
| 666 | __func__, status); |
| 667 | } |
| 668 | |
| 669 | static int qt2_setup_urbs(struct usb_serial *serial) |
| 670 | { |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 671 | struct usb_serial_port *port0; |
| 672 | struct qt2_serial_private *serial_priv; |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 673 | int status; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 674 | |
| 675 | port0 = serial->port[0]; |
| 676 | |
| 677 | serial_priv = usb_get_serial_data(serial); |
| 678 | serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 679 | if (!serial_priv->read_urb) { |
| 680 | dev_err(&serial->dev->dev, "No free urbs available\n"); |
| 681 | return -ENOMEM; |
| 682 | } |
| 683 | |
| 684 | usb_fill_bulk_urb(serial_priv->read_urb, serial->dev, |
| 685 | usb_rcvbulkpipe(serial->dev, |
| 686 | port0->bulk_in_endpointAddress), |
| 687 | serial_priv->read_buffer, |
Johan Hovold | 0448067 | 2013-08-13 13:27:38 +0200 | [diff] [blame] | 688 | QT2_READ_BUFFER_SIZE, |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 689 | qt2_read_bulk_callback, serial); |
| 690 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 691 | status = usb_submit_urb(serial_priv->read_urb, GFP_KERNEL); |
| 692 | if (status != 0) { |
| 693 | dev_err(&serial->dev->dev, |
| 694 | "%s - submit read urb failed %i\n", __func__, status); |
Johan Hovold | b8a0055 | 2012-10-25 10:29:07 +0200 | [diff] [blame] | 695 | usb_free_urb(serial_priv->read_urb); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 696 | return status; |
| 697 | } |
| 698 | |
| 699 | return 0; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 700 | } |
| 701 | |
| 702 | static int qt2_attach(struct usb_serial *serial) |
| 703 | { |
| 704 | struct qt2_serial_private *serial_priv; |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 705 | int status; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 706 | |
| 707 | /* power on unit */ |
| 708 | status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| 709 | 0xc2, 0x40, 0x8000, 0, NULL, 0, |
| 710 | QT2_USB_TIMEOUT); |
| 711 | if (status < 0) { |
| 712 | dev_err(&serial->dev->dev, |
| 713 | "%s - failed to power on unit: %i\n", __func__, status); |
| 714 | return status; |
| 715 | } |
| 716 | |
| 717 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); |
| 718 | if (!serial_priv) { |
| 719 | dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); |
| 720 | return -ENOMEM; |
| 721 | } |
| 722 | |
Johan Hovold | 0448067 | 2013-08-13 13:27:38 +0200 | [diff] [blame] | 723 | serial_priv->read_buffer = kmalloc(QT2_READ_BUFFER_SIZE, GFP_KERNEL); |
| 724 | if (!serial_priv->read_buffer) { |
| 725 | status = -ENOMEM; |
| 726 | goto err_buf; |
| 727 | } |
| 728 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 729 | usb_set_serial_data(serial, serial_priv); |
| 730 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 731 | status = qt2_setup_urbs(serial); |
| 732 | if (status != 0) |
| 733 | goto attach_failed; |
| 734 | |
| 735 | return 0; |
| 736 | |
| 737 | attach_failed: |
Johan Hovold | 0448067 | 2013-08-13 13:27:38 +0200 | [diff] [blame] | 738 | kfree(serial_priv->read_buffer); |
| 739 | err_buf: |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 740 | kfree(serial_priv); |
| 741 | return status; |
| 742 | } |
| 743 | |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 744 | static int qt2_port_probe(struct usb_serial_port *port) |
| 745 | { |
| 746 | struct usb_serial *serial = port->serial; |
| 747 | struct qt2_port_private *port_priv; |
| 748 | u8 bEndpointAddress; |
| 749 | |
| 750 | port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); |
| 751 | if (!port_priv) |
| 752 | return -ENOMEM; |
| 753 | |
| 754 | spin_lock_init(&port_priv->lock); |
| 755 | spin_lock_init(&port_priv->urb_lock); |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 756 | port_priv->port = port; |
| 757 | |
Johan Hovold | cbf30a9 | 2013-08-13 13:27:39 +0200 | [diff] [blame] | 758 | port_priv->write_buffer = kmalloc(QT2_WRITE_BUFFER_SIZE, GFP_KERNEL); |
| 759 | if (!port_priv->write_buffer) |
| 760 | goto err_buf; |
| 761 | |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 762 | port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL); |
Johan Hovold | cbf30a9 | 2013-08-13 13:27:39 +0200 | [diff] [blame] | 763 | if (!port_priv->write_urb) |
| 764 | goto err_urb; |
| 765 | |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 766 | bEndpointAddress = serial->port[0]->bulk_out_endpointAddress; |
| 767 | usb_fill_bulk_urb(port_priv->write_urb, serial->dev, |
| 768 | usb_sndbulkpipe(serial->dev, bEndpointAddress), |
| 769 | port_priv->write_buffer, |
Johan Hovold | cbf30a9 | 2013-08-13 13:27:39 +0200 | [diff] [blame] | 770 | QT2_WRITE_BUFFER_SIZE, |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 771 | qt2_write_bulk_callback, port); |
| 772 | |
| 773 | usb_set_serial_port_data(port, port_priv); |
| 774 | |
| 775 | return 0; |
Johan Hovold | cbf30a9 | 2013-08-13 13:27:39 +0200 | [diff] [blame] | 776 | err_urb: |
| 777 | kfree(port_priv->write_buffer); |
| 778 | err_buf: |
| 779 | kfree(port_priv); |
| 780 | return -ENOMEM; |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 781 | } |
| 782 | |
| 783 | static int qt2_port_remove(struct usb_serial_port *port) |
| 784 | { |
| 785 | struct qt2_port_private *port_priv; |
| 786 | |
| 787 | port_priv = usb_get_serial_port_data(port); |
| 788 | usb_free_urb(port_priv->write_urb); |
Johan Hovold | cbf30a9 | 2013-08-13 13:27:39 +0200 | [diff] [blame] | 789 | kfree(port_priv->write_buffer); |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 790 | kfree(port_priv); |
| 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 795 | static int qt2_tiocmget(struct tty_struct *tty) |
| 796 | { |
| 797 | struct usb_serial_port *port = tty->driver_data; |
| 798 | struct usb_device *dev = port->serial->dev; |
| 799 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); |
| 800 | u8 *d; |
| 801 | int r; |
| 802 | |
| 803 | d = kzalloc(2, GFP_KERNEL); |
| 804 | if (!d) |
| 805 | return -ENOMEM; |
| 806 | |
| 807 | r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d); |
| 808 | if (r < 0) |
| 809 | goto mget_out; |
| 810 | |
| 811 | r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1); |
| 812 | if (r < 0) |
| 813 | goto mget_out; |
| 814 | |
| 815 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | |
| 816 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | |
| 817 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | |
| 818 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | |
| 819 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | |
| 820 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); |
| 821 | |
| 822 | mget_out: |
| 823 | kfree(d); |
| 824 | return r; |
| 825 | } |
| 826 | |
| 827 | static int qt2_tiocmset(struct tty_struct *tty, |
| 828 | unsigned int set, unsigned int clear) |
| 829 | { |
| 830 | struct qt2_port_private *port_priv; |
| 831 | |
| 832 | port_priv = usb_get_serial_port_data(tty->driver_data); |
| 833 | return update_mctrl(port_priv, set, clear); |
| 834 | } |
| 835 | |
| 836 | static void qt2_break_ctl(struct tty_struct *tty, int break_state) |
| 837 | { |
| 838 | struct usb_serial_port *port = tty->driver_data; |
| 839 | struct qt2_port_private *port_priv; |
| 840 | int status; |
| 841 | u16 val; |
| 842 | |
| 843 | port_priv = usb_get_serial_port_data(port); |
| 844 | |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 845 | val = (break_state == -1) ? 1 : 0; |
| 846 | |
| 847 | status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL, |
| 848 | val, port_priv->device_port); |
| 849 | if (status < 0) |
| 850 | dev_warn(&port->dev, |
| 851 | "%s - failed to send control message: %i\n", __func__, |
| 852 | status); |
| 853 | } |
| 854 | |
| 855 | |
| 856 | |
| 857 | static void qt2_dtr_rts(struct usb_serial_port *port, int on) |
| 858 | { |
| 859 | struct usb_device *dev = port->serial->dev; |
| 860 | struct qt2_port_private *port_priv = usb_get_serial_port_data(port); |
| 861 | |
Johan Hovold | b2ca699 | 2013-02-13 17:53:28 +0100 | [diff] [blame] | 862 | /* Disable flow control */ |
| 863 | if (!on) { |
| 864 | if (qt2_setregister(dev, port_priv->device_port, |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 865 | UART_MCR, 0) < 0) |
| 866 | dev_warn(&port->dev, "error from flowcontrol urb\n"); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 867 | } |
Johan Hovold | b2ca699 | 2013-02-13 17:53:28 +0100 | [diff] [blame] | 868 | /* drop RTS and DTR */ |
| 869 | if (on) |
| 870 | update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0); |
| 871 | else |
| 872 | update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 873 | } |
| 874 | |
| 875 | static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch) |
| 876 | { |
| 877 | struct qt2_port_private *port_priv; |
| 878 | u8 newMSR = (u8) *ch; |
| 879 | unsigned long flags; |
| 880 | |
| 881 | port_priv = usb_get_serial_port_data(port); |
| 882 | |
| 883 | spin_lock_irqsave(&port_priv->lock, flags); |
| 884 | port_priv->shadowMSR = newMSR; |
| 885 | spin_unlock_irqrestore(&port_priv->lock, flags); |
| 886 | |
| 887 | if (newMSR & UART_MSR_ANY_DELTA) { |
| 888 | /* update input line counters */ |
| 889 | if (newMSR & UART_MSR_DCTS) |
Johan Hovold | 0a4142f | 2013-03-21 12:37:22 +0100 | [diff] [blame] | 890 | port->icount.cts++; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 891 | if (newMSR & UART_MSR_DDSR) |
Johan Hovold | 0a4142f | 2013-03-21 12:37:22 +0100 | [diff] [blame] | 892 | port->icount.dsr++; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 893 | if (newMSR & UART_MSR_DDCD) |
Johan Hovold | 0a4142f | 2013-03-21 12:37:22 +0100 | [diff] [blame] | 894 | port->icount.dcd++; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 895 | if (newMSR & UART_MSR_TERI) |
Johan Hovold | 0a4142f | 2013-03-21 12:37:22 +0100 | [diff] [blame] | 896 | port->icount.rng++; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 897 | |
Johan Hovold | b595970 | 2013-03-21 12:37:23 +0100 | [diff] [blame] | 898 | wake_up_interruptible(&port->port.delta_msr_wait); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 899 | } |
| 900 | } |
| 901 | |
| 902 | static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch) |
| 903 | { |
| 904 | struct qt2_port_private *port_priv; |
| 905 | struct async_icount *icount; |
| 906 | unsigned long flags; |
| 907 | u8 newLSR = (u8) *ch; |
| 908 | |
| 909 | port_priv = usb_get_serial_port_data(port); |
| 910 | |
| 911 | if (newLSR & UART_LSR_BI) |
| 912 | newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI); |
| 913 | |
| 914 | spin_lock_irqsave(&port_priv->lock, flags); |
| 915 | port_priv->shadowLSR = newLSR; |
| 916 | spin_unlock_irqrestore(&port_priv->lock, flags); |
| 917 | |
Johan Hovold | 0a4142f | 2013-03-21 12:37:22 +0100 | [diff] [blame] | 918 | icount = &port->icount; |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 919 | |
| 920 | if (newLSR & UART_LSR_BRK_ERROR_BITS) { |
| 921 | |
| 922 | if (newLSR & UART_LSR_BI) |
| 923 | icount->brk++; |
| 924 | |
| 925 | if (newLSR & UART_LSR_OE) |
| 926 | icount->overrun++; |
| 927 | |
| 928 | if (newLSR & UART_LSR_PE) |
| 929 | icount->parity++; |
| 930 | |
| 931 | if (newLSR & UART_LSR_FE) |
| 932 | icount->frame++; |
| 933 | } |
| 934 | |
| 935 | } |
| 936 | |
| 937 | static int qt2_write_room(struct tty_struct *tty) |
| 938 | { |
| 939 | struct usb_serial_port *port = tty->driver_data; |
| 940 | struct qt2_port_private *port_priv; |
| 941 | unsigned long flags = 0; |
| 942 | int r; |
| 943 | |
| 944 | port_priv = usb_get_serial_port_data(port); |
| 945 | |
| 946 | spin_lock_irqsave(&port_priv->urb_lock, flags); |
| 947 | |
| 948 | if (port_priv->urb_in_use) |
| 949 | r = 0; |
| 950 | else |
| 951 | r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE; |
| 952 | |
| 953 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); |
| 954 | |
| 955 | return r; |
| 956 | } |
| 957 | |
| 958 | static int qt2_write(struct tty_struct *tty, |
| 959 | struct usb_serial_port *port, |
| 960 | const unsigned char *buf, int count) |
| 961 | { |
| 962 | struct qt2_port_private *port_priv; |
| 963 | struct urb *write_urb; |
| 964 | unsigned char *data; |
| 965 | unsigned long flags; |
| 966 | int status; |
| 967 | int bytes_out = 0; |
| 968 | |
| 969 | port_priv = usb_get_serial_port_data(port); |
| 970 | |
| 971 | if (port_priv->write_urb == NULL) { |
| 972 | dev_err(&port->dev, "%s - no output urb\n", __func__); |
| 973 | return 0; |
| 974 | } |
| 975 | write_urb = port_priv->write_urb; |
| 976 | |
| 977 | count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE); |
| 978 | |
| 979 | data = write_urb->transfer_buffer; |
| 980 | spin_lock_irqsave(&port_priv->urb_lock, flags); |
| 981 | if (port_priv->urb_in_use == true) { |
Greg Kroah-Hartman | 788a661 | 2012-09-18 17:05:37 +0100 | [diff] [blame] | 982 | dev_err(&port->dev, "qt2_write - urb is in use\n"); |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 983 | goto write_out; |
| 984 | } |
| 985 | |
| 986 | *data++ = QT2_CONTROL_BYTE; |
| 987 | *data++ = QT2_CONTROL_BYTE; |
| 988 | *data++ = port_priv->device_port; |
| 989 | put_unaligned_le16(count, data); |
| 990 | data += 2; |
| 991 | memcpy(data, buf, count); |
| 992 | |
| 993 | write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE; |
| 994 | |
| 995 | status = usb_submit_urb(write_urb, GFP_ATOMIC); |
| 996 | if (status == 0) { |
| 997 | port_priv->urb_in_use = true; |
| 998 | bytes_out += count; |
| 999 | } |
| 1000 | |
| 1001 | write_out: |
| 1002 | spin_unlock_irqrestore(&port_priv->urb_lock, flags); |
| 1003 | return bytes_out; |
| 1004 | } |
| 1005 | |
| 1006 | |
| 1007 | static struct usb_serial_driver qt2_device = { |
| 1008 | .driver = { |
| 1009 | .owner = THIS_MODULE, |
| 1010 | .name = "quatech-serial", |
| 1011 | }, |
| 1012 | .description = DRIVER_DESC, |
| 1013 | .id_table = id_table, |
| 1014 | .open = qt2_open, |
| 1015 | .close = qt2_close, |
| 1016 | .write = qt2_write, |
| 1017 | .write_room = qt2_write_room, |
| 1018 | .calc_num_ports = qt2_calc_num_ports, |
| 1019 | .attach = qt2_attach, |
| 1020 | .release = qt2_release, |
| 1021 | .disconnect = qt2_disconnect, |
Johan Hovold | 40d0473 | 2012-10-25 10:29:08 +0200 | [diff] [blame] | 1022 | .port_probe = qt2_port_probe, |
| 1023 | .port_remove = qt2_port_remove, |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 1024 | .dtr_rts = qt2_dtr_rts, |
| 1025 | .break_ctl = qt2_break_ctl, |
| 1026 | .tiocmget = qt2_tiocmget, |
| 1027 | .tiocmset = qt2_tiocmset, |
Johan Hovold | b595970 | 2013-03-21 12:37:23 +0100 | [diff] [blame] | 1028 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
Johan Hovold | 0a4142f | 2013-03-21 12:37:22 +0100 | [diff] [blame] | 1029 | .get_icount = usb_serial_generic_get_icount, |
Bill Pemberton | f7a33e60 | 2012-05-10 15:36:02 -0400 | [diff] [blame] | 1030 | .ioctl = qt2_ioctl, |
| 1031 | .set_termios = qt2_set_termios, |
| 1032 | }; |
| 1033 | |
| 1034 | static struct usb_serial_driver *const serial_drivers[] = { |
| 1035 | &qt2_device, NULL |
| 1036 | }; |
| 1037 | |
| 1038 | module_usb_serial_driver(serial_drivers, id_table); |
| 1039 | |
| 1040 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 1041 | MODULE_LICENSE("GPL"); |