Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Digi AccelePort USB-4 and USB-2 Serial Converters |
| 3 | * |
| 4 | * Copyright 2000 by Digi International |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's |
| 12 | * usb-serial driver. |
| 13 | * |
| 14 | * Peter Berger (pberger@brimson.com) |
| 15 | * Al Borchers (borchers@steinerpoint.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | */ |
| 17 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/kernel.h> |
| 19 | #include <linux/errno.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/tty.h> |
| 23 | #include <linux/tty_driver.h> |
| 24 | #include <linux/tty_flip.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/spinlock.h> |
| 27 | #include <linux/workqueue.h> |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 28 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/usb.h> |
| 30 | #include <linux/wait.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 31 | #include <linux/usb/serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | /* Defines */ |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>" |
| 36 | #define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver" |
| 37 | |
| 38 | /* port output buffer length -- must be <= transfer buffer length - 2 */ |
| 39 | /* so we can be sure to send the full buffer in one urb */ |
| 40 | #define DIGI_OUT_BUF_SIZE 8 |
| 41 | |
| 42 | /* port input buffer length -- must be >= transfer buffer length - 3 */ |
| 43 | /* so we can be sure to hold at least one full buffer from one urb */ |
| 44 | #define DIGI_IN_BUF_SIZE 64 |
| 45 | |
| 46 | /* retry timeout while sleeping */ |
| 47 | #define DIGI_RETRY_TIMEOUT (HZ/10) |
| 48 | |
| 49 | /* timeout while waiting for tty output to drain in close */ |
| 50 | /* this delay is used twice in close, so the total delay could */ |
| 51 | /* be twice this value */ |
| 52 | #define DIGI_CLOSE_TIMEOUT (5*HZ) |
| 53 | |
| 54 | |
| 55 | /* AccelePort USB Defines */ |
| 56 | |
| 57 | /* ids */ |
| 58 | #define DIGI_VENDOR_ID 0x05c5 |
| 59 | #define DIGI_2_ID 0x0002 /* USB-2 */ |
| 60 | #define DIGI_4_ID 0x0004 /* USB-4 */ |
| 61 | |
| 62 | /* commands |
| 63 | * "INB": can be used on the in-band endpoint |
| 64 | * "OOB": can be used on the out-of-band endpoint |
| 65 | */ |
| 66 | #define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */ |
| 67 | #define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */ |
| 68 | #define DIGI_CMD_SET_PARITY 2 /* INB, OOB */ |
| 69 | #define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */ |
| 70 | #define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */ |
| 71 | #define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */ |
| 72 | #define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */ |
| 73 | #define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */ |
| 74 | #define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */ |
| 75 | #define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */ |
| 76 | #define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */ |
| 77 | #define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */ |
| 78 | #define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */ |
| 79 | #define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */ |
| 80 | #define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */ |
| 81 | #define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */ |
| 82 | #define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */ |
| 83 | #define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */ |
| 84 | #define DIGI_CMD_SEND_DATA 18 /* INB */ |
| 85 | #define DIGI_CMD_RECEIVE_DATA 19 /* INB */ |
| 86 | #define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */ |
| 87 | #define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */ |
| 88 | |
| 89 | /* baud rates */ |
| 90 | #define DIGI_BAUD_50 0 |
| 91 | #define DIGI_BAUD_75 1 |
| 92 | #define DIGI_BAUD_110 2 |
| 93 | #define DIGI_BAUD_150 3 |
| 94 | #define DIGI_BAUD_200 4 |
| 95 | #define DIGI_BAUD_300 5 |
| 96 | #define DIGI_BAUD_600 6 |
| 97 | #define DIGI_BAUD_1200 7 |
| 98 | #define DIGI_BAUD_1800 8 |
| 99 | #define DIGI_BAUD_2400 9 |
| 100 | #define DIGI_BAUD_4800 10 |
| 101 | #define DIGI_BAUD_7200 11 |
| 102 | #define DIGI_BAUD_9600 12 |
| 103 | #define DIGI_BAUD_14400 13 |
| 104 | #define DIGI_BAUD_19200 14 |
| 105 | #define DIGI_BAUD_28800 15 |
| 106 | #define DIGI_BAUD_38400 16 |
| 107 | #define DIGI_BAUD_57600 17 |
| 108 | #define DIGI_BAUD_76800 18 |
| 109 | #define DIGI_BAUD_115200 19 |
| 110 | #define DIGI_BAUD_153600 20 |
| 111 | #define DIGI_BAUD_230400 21 |
| 112 | #define DIGI_BAUD_460800 22 |
| 113 | |
| 114 | /* arguments */ |
| 115 | #define DIGI_WORD_SIZE_5 0 |
| 116 | #define DIGI_WORD_SIZE_6 1 |
| 117 | #define DIGI_WORD_SIZE_7 2 |
| 118 | #define DIGI_WORD_SIZE_8 3 |
| 119 | |
| 120 | #define DIGI_PARITY_NONE 0 |
| 121 | #define DIGI_PARITY_ODD 1 |
| 122 | #define DIGI_PARITY_EVEN 2 |
| 123 | #define DIGI_PARITY_MARK 3 |
| 124 | #define DIGI_PARITY_SPACE 4 |
| 125 | |
| 126 | #define DIGI_STOP_BITS_1 0 |
| 127 | #define DIGI_STOP_BITS_2 1 |
| 128 | |
| 129 | #define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1 |
| 130 | #define DIGI_INPUT_FLOW_CONTROL_RTS 2 |
| 131 | #define DIGI_INPUT_FLOW_CONTROL_DTR 4 |
| 132 | |
| 133 | #define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1 |
| 134 | #define DIGI_OUTPUT_FLOW_CONTROL_CTS 2 |
| 135 | #define DIGI_OUTPUT_FLOW_CONTROL_DSR 4 |
| 136 | |
| 137 | #define DIGI_DTR_INACTIVE 0 |
| 138 | #define DIGI_DTR_ACTIVE 1 |
| 139 | #define DIGI_DTR_INPUT_FLOW_CONTROL 2 |
| 140 | |
| 141 | #define DIGI_RTS_INACTIVE 0 |
| 142 | #define DIGI_RTS_ACTIVE 1 |
| 143 | #define DIGI_RTS_INPUT_FLOW_CONTROL 2 |
| 144 | #define DIGI_RTS_TOGGLE 3 |
| 145 | |
| 146 | #define DIGI_FLUSH_TX 1 |
| 147 | #define DIGI_FLUSH_RX 2 |
| 148 | #define DIGI_RESUME_TX 4 /* clears xoff condition */ |
| 149 | |
| 150 | #define DIGI_TRANSMIT_NOT_IDLE 0 |
| 151 | #define DIGI_TRANSMIT_IDLE 1 |
| 152 | |
| 153 | #define DIGI_DISABLE 0 |
| 154 | #define DIGI_ENABLE 1 |
| 155 | |
| 156 | #define DIGI_DEASSERT 0 |
| 157 | #define DIGI_ASSERT 1 |
| 158 | |
| 159 | /* in band status codes */ |
| 160 | #define DIGI_OVERRUN_ERROR 4 |
| 161 | #define DIGI_PARITY_ERROR 8 |
| 162 | #define DIGI_FRAMING_ERROR 16 |
| 163 | #define DIGI_BREAK_ERROR 32 |
| 164 | |
| 165 | /* out of band status */ |
| 166 | #define DIGI_NO_ERROR 0 |
| 167 | #define DIGI_BAD_FIRST_PARAMETER 1 |
| 168 | #define DIGI_BAD_SECOND_PARAMETER 2 |
| 169 | #define DIGI_INVALID_LINE 3 |
| 170 | #define DIGI_INVALID_OPCODE 4 |
| 171 | |
| 172 | /* input signals */ |
| 173 | #define DIGI_READ_INPUT_SIGNALS_SLOT 1 |
| 174 | #define DIGI_READ_INPUT_SIGNALS_ERR 2 |
| 175 | #define DIGI_READ_INPUT_SIGNALS_BUSY 4 |
| 176 | #define DIGI_READ_INPUT_SIGNALS_PE 8 |
| 177 | #define DIGI_READ_INPUT_SIGNALS_CTS 16 |
| 178 | #define DIGI_READ_INPUT_SIGNALS_DSR 32 |
| 179 | #define DIGI_READ_INPUT_SIGNALS_RI 64 |
| 180 | #define DIGI_READ_INPUT_SIGNALS_DCD 128 |
| 181 | |
| 182 | |
| 183 | /* Structures */ |
| 184 | |
| 185 | struct digi_serial { |
| 186 | spinlock_t ds_serial_lock; |
| 187 | struct usb_serial_port *ds_oob_port; /* out-of-band port */ |
| 188 | int ds_oob_port_num; /* index of out-of-band port */ |
| 189 | int ds_device_started; |
| 190 | }; |
| 191 | |
| 192 | struct digi_port { |
| 193 | spinlock_t dp_port_lock; |
| 194 | int dp_port_num; |
| 195 | int dp_out_buf_len; |
| 196 | unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | int dp_write_urb_in_use; |
| 198 | unsigned int dp_modem_signals; |
| 199 | wait_queue_head_t dp_modem_change_wait; |
| 200 | int dp_transmit_idle; |
| 201 | wait_queue_head_t dp_transmit_idle_wait; |
| 202 | int dp_throttled; |
| 203 | int dp_throttle_restart; |
| 204 | wait_queue_head_t dp_flush_wait; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | wait_queue_head_t dp_close_wait; /* wait queue for close */ |
| 206 | struct work_struct dp_wakeup_work; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 207 | struct usb_serial_port *dp_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | }; |
| 209 | |
| 210 | |
| 211 | /* Local Function Declarations */ |
| 212 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 213 | static void digi_wakeup_write_lock(struct work_struct *work); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 214 | static int digi_write_oob_command(struct usb_serial_port *port, |
| 215 | unsigned char *buf, int count, int interruptible); |
| 216 | static int digi_write_inb_command(struct usb_serial_port *port, |
| 217 | unsigned char *buf, int count, unsigned long timeout); |
| 218 | static int digi_set_modem_signals(struct usb_serial_port *port, |
| 219 | unsigned int modem_signals, int interruptible); |
| 220 | static int digi_transmit_idle(struct usb_serial_port *port, |
| 221 | unsigned long timeout); |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 222 | static void digi_rx_throttle(struct tty_struct *tty); |
| 223 | static void digi_rx_unthrottle(struct tty_struct *tty); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 224 | static void digi_set_termios(struct tty_struct *tty, |
| 225 | struct usb_serial_port *port, struct ktermios *old_termios); |
| 226 | static void digi_break_ctl(struct tty_struct *tty, int break_state); |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 227 | static int digi_tiocmget(struct tty_struct *tty); |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 228 | static int digi_tiocmset(struct tty_struct *tty, unsigned int set, |
| 229 | unsigned int clear); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 230 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 231 | const unsigned char *buf, int count); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 232 | static void digi_write_bulk_callback(struct urb *urb); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 233 | static int digi_write_room(struct tty_struct *tty); |
| 234 | static int digi_chars_in_buffer(struct tty_struct *tty); |
Alan Cox | a509a7e | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 235 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 236 | static void digi_close(struct usb_serial_port *port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 237 | static void digi_dtr_rts(struct usb_serial_port *port, int on); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 238 | static int digi_startup_device(struct usb_serial *serial); |
| 239 | static int digi_startup(struct usb_serial *serial); |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 240 | static void digi_disconnect(struct usb_serial *serial); |
| 241 | static void digi_release(struct usb_serial *serial); |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 242 | static int digi_port_probe(struct usb_serial_port *port); |
| 243 | static int digi_port_remove(struct usb_serial_port *port); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 244 | static void digi_read_bulk_callback(struct urb *urb); |
| 245 | static int digi_read_inb_callback(struct urb *urb); |
| 246 | static int digi_read_oob_callback(struct urb *urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | |
Németh Márton | 7d40d7e | 2010-01-10 15:34:24 +0100 | [diff] [blame] | 249 | static const struct usb_device_id id_table_combined[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
| 251 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, |
| 252 | { } /* Terminating entry */ |
| 253 | }; |
| 254 | |
Németh Márton | 7d40d7e | 2010-01-10 15:34:24 +0100 | [diff] [blame] | 255 | static const struct usb_device_id id_table_2[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
| 257 | { } /* Terminating entry */ |
| 258 | }; |
| 259 | |
Németh Márton | 7d40d7e | 2010-01-10 15:34:24 +0100 | [diff] [blame] | 260 | static const struct usb_device_id id_table_4[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, |
| 262 | { } /* Terminating entry */ |
| 263 | }; |
| 264 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 265 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | /* device info needed for the Digi serial converter */ |
| 268 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 269 | static struct usb_serial_driver digi_acceleport_2_device = { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 270 | .driver = { |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 271 | .owner = THIS_MODULE, |
| 272 | .name = "digi_2", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 273 | }, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 274 | .description = "Digi 2 port USB adapter", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | .id_table = id_table_2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | .num_ports = 3, |
| 277 | .open = digi_open, |
| 278 | .close = digi_close, |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 279 | .dtr_rts = digi_dtr_rts, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | .write = digi_write, |
| 281 | .write_room = digi_write_room, |
| 282 | .write_bulk_callback = digi_write_bulk_callback, |
| 283 | .read_bulk_callback = digi_read_bulk_callback, |
| 284 | .chars_in_buffer = digi_chars_in_buffer, |
| 285 | .throttle = digi_rx_throttle, |
| 286 | .unthrottle = digi_rx_unthrottle, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | .set_termios = digi_set_termios, |
| 288 | .break_ctl = digi_break_ctl, |
| 289 | .tiocmget = digi_tiocmget, |
| 290 | .tiocmset = digi_tiocmset, |
| 291 | .attach = digi_startup, |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 292 | .disconnect = digi_disconnect, |
| 293 | .release = digi_release, |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 294 | .port_probe = digi_port_probe, |
| 295 | .port_remove = digi_port_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | }; |
| 297 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 298 | static struct usb_serial_driver digi_acceleport_4_device = { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 299 | .driver = { |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 300 | .owner = THIS_MODULE, |
| 301 | .name = "digi_4", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 302 | }, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 303 | .description = "Digi 4 port USB adapter", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | .id_table = id_table_4, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | .num_ports = 4, |
| 306 | .open = digi_open, |
| 307 | .close = digi_close, |
| 308 | .write = digi_write, |
| 309 | .write_room = digi_write_room, |
| 310 | .write_bulk_callback = digi_write_bulk_callback, |
| 311 | .read_bulk_callback = digi_read_bulk_callback, |
| 312 | .chars_in_buffer = digi_chars_in_buffer, |
| 313 | .throttle = digi_rx_throttle, |
| 314 | .unthrottle = digi_rx_unthrottle, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | .set_termios = digi_set_termios, |
| 316 | .break_ctl = digi_break_ctl, |
| 317 | .tiocmget = digi_tiocmget, |
| 318 | .tiocmset = digi_tiocmset, |
| 319 | .attach = digi_startup, |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 320 | .disconnect = digi_disconnect, |
| 321 | .release = digi_release, |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 322 | .port_probe = digi_port_probe, |
| 323 | .port_remove = digi_port_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | }; |
| 325 | |
Alan Stern | 97b6b6d | 2012-02-23 14:56:32 -0500 | [diff] [blame] | 326 | static struct usb_serial_driver * const serial_drivers[] = { |
| 327 | &digi_acceleport_2_device, &digi_acceleport_4_device, NULL |
| 328 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | /* Functions */ |
| 331 | |
| 332 | /* |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 333 | * Cond Wait Interruptible Timeout Irqrestore |
| 334 | * |
| 335 | * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout |
| 336 | * so that wake ups are not lost if they occur between the unlock |
| 337 | * and the sleep. In other words, spin_unlock_irqrestore and |
| 338 | * interruptible_sleep_on_timeout are "atomic" with respect to |
| 339 | * wake ups. This is used to implement condition variables. |
| 340 | * |
| 341 | * interruptible_sleep_on_timeout is deprecated and has been replaced |
| 342 | * with the equivalent code. |
| 343 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 345 | static long cond_wait_interruptible_timeout_irqrestore( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | wait_queue_head_t *q, long timeout, |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 347 | spinlock_t *lock, unsigned long flags) |
Harvey Harrison | 5a33956 | 2008-05-30 10:18:53 -0700 | [diff] [blame] | 348 | __releases(lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | { |
| 350 | DEFINE_WAIT(wait); |
| 351 | |
Nishanth Aravamudan | 45f23f1 | 2005-04-18 17:39:25 -0700 | [diff] [blame] | 352 | prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | spin_unlock_irqrestore(lock, flags); |
| 354 | timeout = schedule_timeout(timeout); |
| 355 | finish_wait(q, &wait); |
| 356 | |
| 357 | return timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | } |
| 359 | |
| 360 | |
| 361 | /* |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 362 | * Digi Wakeup Write |
| 363 | * |
| 364 | * Wake up port, line discipline, and tty processes sleeping |
| 365 | * on writes. |
| 366 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 368 | static void digi_wakeup_write_lock(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | { |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 370 | struct digi_port *priv = |
| 371 | container_of(work, struct digi_port, dp_wakeup_work); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 372 | struct usb_serial_port *port = priv->dp_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 375 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Jiri Slaby | 6aad04f | 2013-03-07 13:12:29 +0100 | [diff] [blame^] | 376 | tty_port_tty_wakeup(&port->port); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 377 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
| 379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | /* |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 381 | * Digi Write OOB Command |
| 382 | * |
| 383 | * Write commands on the out of band port. Commands are 4 |
| 384 | * bytes each, multiple commands can be sent at once, and |
| 385 | * no command will be split across USB packets. Returns 0 |
| 386 | * if successful, -EINTR if interrupted while sleeping and |
| 387 | * the interruptible flag is true, or a negative error |
| 388 | * returned by usb_submit_urb. |
| 389 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 391 | static int digi_write_oob_command(struct usb_serial_port *port, |
| 392 | unsigned char *buf, int count, int interruptible) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | int ret = 0; |
| 395 | int len; |
| 396 | struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
| 397 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
| 398 | unsigned long flags = 0; |
| 399 | |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 400 | dev_dbg(&port->dev, |
| 401 | "digi_write_oob_command: TOP: port=%d, count=%d\n", |
| 402 | oob_priv->dp_port_num, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 404 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 405 | while (count > 0) { |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 406 | while (oob_priv->dp_write_urb_in_use) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | cond_wait_interruptible_timeout_irqrestore( |
| 408 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 409 | &oob_priv->dp_port_lock, flags); |
| 410 | if (interruptible && signal_pending(current)) |
| 411 | return -EINTR; |
| 412 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | /* len must be a multiple of 4, so commands are not split */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 416 | len = min(count, oob_port->bulk_out_size); |
| 417 | if (len > 4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | len &= ~3; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 419 | memcpy(oob_port->write_urb->transfer_buffer, buf, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | oob_port->write_urb->transfer_buffer_length = len; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 421 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
| 422 | if (ret == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | oob_priv->dp_write_urb_in_use = 1; |
| 424 | count -= len; |
| 425 | buf += len; |
| 426 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 428 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
| 429 | if (ret) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 430 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
| 431 | __func__, ret); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 432 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
| 434 | } |
| 435 | |
| 436 | |
| 437 | /* |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 438 | * Digi Write In Band Command |
| 439 | * |
| 440 | * Write commands on the given port. Commands are 4 |
| 441 | * bytes each, multiple commands can be sent at once, and |
| 442 | * no command will be split across USB packets. If timeout |
| 443 | * is non-zero, write in band command will return after |
| 444 | * waiting unsuccessfully for the URB status to clear for |
| 445 | * timeout ticks. Returns 0 if successful, or a negative |
| 446 | * error returned by digi_write. |
| 447 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 449 | static int digi_write_inb_command(struct usb_serial_port *port, |
| 450 | unsigned char *buf, int count, unsigned long timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | int ret = 0; |
| 453 | int len; |
| 454 | struct digi_port *priv = usb_get_serial_port_data(port); |
| 455 | unsigned char *data = port->write_urb->transfer_buffer; |
| 456 | unsigned long flags = 0; |
| 457 | |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 458 | dev_dbg(&port->dev, "digi_write_inb_command: TOP: port=%d, count=%d\n", |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 459 | priv->dp_port_num, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 461 | if (timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | timeout += jiffies; |
| 463 | else |
| 464 | timeout = ULONG_MAX; |
| 465 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 466 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 467 | while (count > 0 && ret == 0) { |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 468 | while (priv->dp_write_urb_in_use && |
| 469 | time_before(jiffies, timeout)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | cond_wait_interruptible_timeout_irqrestore( |
| 471 | &port->write_wait, DIGI_RETRY_TIMEOUT, |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 472 | &priv->dp_port_lock, flags); |
| 473 | if (signal_pending(current)) |
| 474 | return -EINTR; |
| 475 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | } |
| 477 | |
| 478 | /* len must be a multiple of 4 and small enough to */ |
| 479 | /* guarantee the write will send buffered data first, */ |
| 480 | /* so commands are in order with data and not split */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 481 | len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
| 482 | if (len > 4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | len &= ~3; |
| 484 | |
| 485 | /* write any buffered data first */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 486 | if (priv->dp_out_buf_len > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | data[0] = DIGI_CMD_SEND_DATA; |
| 488 | data[1] = priv->dp_out_buf_len; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 489 | memcpy(data + 2, priv->dp_out_buf, |
| 490 | priv->dp_out_buf_len); |
| 491 | memcpy(data + 2 + priv->dp_out_buf_len, buf, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | port->write_urb->transfer_buffer_length |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 493 | = priv->dp_out_buf_len + 2 + len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } else { |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 495 | memcpy(data, buf, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | port->write_urb->transfer_buffer_length = len; |
| 497 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 499 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
| 500 | if (ret == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | priv->dp_write_urb_in_use = 1; |
| 502 | priv->dp_out_buf_len = 0; |
| 503 | count -= len; |
| 504 | buf += len; |
| 505 | } |
| 506 | |
| 507 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 508 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 510 | if (ret) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 511 | dev_err(&port->dev, |
| 512 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 513 | __func__, ret, priv->dp_port_num); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 514 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | |
| 518 | /* |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 519 | * Digi Set Modem Signals |
| 520 | * |
| 521 | * Sets or clears DTR and RTS on the port, according to the |
| 522 | * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags |
| 523 | * for the modem_signals argument. Returns 0 if successful, |
| 524 | * -EINTR if interrupted while sleeping, or a non-zero error |
| 525 | * returned by usb_submit_urb. |
| 526 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 528 | static int digi_set_modem_signals(struct usb_serial_port *port, |
| 529 | unsigned int modem_signals, int interruptible) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | { |
| 531 | |
| 532 | int ret; |
| 533 | struct digi_port *port_priv = usb_get_serial_port_data(port); |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 534 | struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
| 536 | unsigned char *data = oob_port->write_urb->transfer_buffer; |
| 537 | unsigned long flags = 0; |
| 538 | |
| 539 | |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 540 | dev_dbg(&port->dev, |
| 541 | "digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x\n", |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 542 | port_priv->dp_port_num, modem_signals); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 544 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
| 545 | spin_lock(&port_priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 547 | while (oob_priv->dp_write_urb_in_use) { |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 548 | spin_unlock(&port_priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | cond_wait_interruptible_timeout_irqrestore( |
| 550 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 551 | &oob_priv->dp_port_lock, flags); |
| 552 | if (interruptible && signal_pending(current)) |
| 553 | return -EINTR; |
| 554 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
| 555 | spin_lock(&port_priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | data[0] = DIGI_CMD_SET_DTR_SIGNAL; |
| 558 | data[1] = port_priv->dp_port_num; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 559 | data[2] = (modem_signals & TIOCM_DTR) ? |
| 560 | DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | data[3] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | data[4] = DIGI_CMD_SET_RTS_SIGNAL; |
| 563 | data[5] = port_priv->dp_port_num; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 564 | data[6] = (modem_signals & TIOCM_RTS) ? |
| 565 | DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | data[7] = 0; |
| 567 | |
| 568 | oob_port->write_urb->transfer_buffer_length = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 570 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
| 571 | if (ret == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | oob_priv->dp_write_urb_in_use = 1; |
| 573 | port_priv->dp_modem_signals = |
| 574 | (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS)) |
| 575 | | (modem_signals&(TIOCM_DTR|TIOCM_RTS)); |
| 576 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 577 | spin_unlock(&port_priv->dp_port_lock); |
| 578 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
| 579 | if (ret) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 580 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
| 581 | __func__, ret); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 582 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
| 584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | /* |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 586 | * Digi Transmit Idle |
| 587 | * |
| 588 | * Digi transmit idle waits, up to timeout ticks, for the transmitter |
| 589 | * to go idle. It returns 0 if successful or a negative error. |
| 590 | * |
| 591 | * There are race conditions here if more than one process is calling |
| 592 | * digi_transmit_idle on the same port at the same time. However, this |
| 593 | * is only called from close, and only one process can be in close on a |
| 594 | * port at a time, so its ok. |
| 595 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 597 | static int digi_transmit_idle(struct usb_serial_port *port, |
| 598 | unsigned long timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | int ret; |
| 601 | unsigned char buf[2]; |
| 602 | struct digi_port *priv = usb_get_serial_port_data(port); |
| 603 | unsigned long flags = 0; |
| 604 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 605 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | priv->dp_transmit_idle = 0; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 607 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
| 609 | buf[0] = DIGI_CMD_TRANSMIT_IDLE; |
| 610 | buf[1] = 0; |
| 611 | |
| 612 | timeout += jiffies; |
| 613 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 614 | ret = digi_write_inb_command(port, buf, 2, timeout - jiffies); |
| 615 | if (ret != 0) |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 616 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 618 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 620 | while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | cond_wait_interruptible_timeout_irqrestore( |
| 622 | &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT, |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 623 | &priv->dp_port_lock, flags); |
| 624 | if (signal_pending(current)) |
| 625 | return -EINTR; |
| 626 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | priv->dp_transmit_idle = 0; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 629 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
| 630 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | |
| 632 | } |
| 633 | |
| 634 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 635 | static void digi_rx_throttle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | unsigned long flags; |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 638 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | struct digi_port *priv = usb_get_serial_port_data(port); |
| 640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | /* stop receiving characters by not resubmitting the read urb */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 642 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | priv->dp_throttled = 1; |
| 644 | priv->dp_throttle_restart = 0; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 645 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 649 | static void digi_rx_unthrottle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | unsigned long flags; |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 653 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | struct digi_port *priv = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 656 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | /* restart read chain */ |
Johan Hovold | 5833041 | 2011-11-06 19:06:28 +0100 | [diff] [blame] | 659 | if (priv->dp_throttle_restart) |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 660 | ret = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
Johan Hovold | ba6b702 | 2009-09-29 12:39:23 +0200 | [diff] [blame] | 662 | /* turn throttle off */ |
| 663 | priv->dp_throttled = 0; |
| 664 | priv->dp_throttle_restart = 0; |
| 665 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 666 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 668 | if (ret) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 669 | dev_err(&port->dev, |
| 670 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 671 | __func__, ret, priv->dp_port_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | } |
| 673 | |
| 674 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 675 | static void digi_set_termios(struct tty_struct *tty, |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 676 | struct usb_serial_port *port, struct ktermios *old_termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | struct digi_port *priv = usb_get_serial_port_data(port); |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 679 | struct device *dev = &port->dev; |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 680 | unsigned int iflag = tty->termios.c_iflag; |
| 681 | unsigned int cflag = tty->termios.c_cflag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | unsigned int old_iflag = old_termios->c_iflag; |
| 683 | unsigned int old_cflag = old_termios->c_cflag; |
| 684 | unsigned char buf[32]; |
| 685 | unsigned int modem_signals; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 686 | int arg, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | int i = 0; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 688 | speed_t baud; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 690 | dev_dbg(dev, |
| 691 | "digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x\n", |
| 692 | priv->dp_port_num, iflag, old_iflag, cflag, old_cflag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
| 694 | /* set baud rate */ |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 695 | baud = tty_get_baud_rate(tty); |
| 696 | if (baud != tty_termios_baud_rate(old_termios)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | arg = -1; |
| 698 | |
| 699 | /* reassert DTR and (maybe) RTS on transition from B0 */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 700 | if ((old_cflag&CBAUD) == B0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | /* don't set RTS if using hardware flow control */ |
| 702 | /* and throttling input */ |
| 703 | modem_signals = TIOCM_DTR; |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 704 | if (!(tty->termios.c_cflag & CRTSCTS) || |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 705 | !test_bit(TTY_THROTTLED, &tty->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | modem_signals |= TIOCM_RTS; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 707 | digi_set_modem_signals(port, modem_signals, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 709 | switch (baud) { |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 710 | /* drop DTR and RTS on transition to B0 */ |
| 711 | case 0: digi_set_modem_signals(port, 0, 1); break; |
| 712 | case 50: arg = DIGI_BAUD_50; break; |
| 713 | case 75: arg = DIGI_BAUD_75; break; |
| 714 | case 110: arg = DIGI_BAUD_110; break; |
| 715 | case 150: arg = DIGI_BAUD_150; break; |
| 716 | case 200: arg = DIGI_BAUD_200; break; |
| 717 | case 300: arg = DIGI_BAUD_300; break; |
| 718 | case 600: arg = DIGI_BAUD_600; break; |
| 719 | case 1200: arg = DIGI_BAUD_1200; break; |
| 720 | case 1800: arg = DIGI_BAUD_1800; break; |
| 721 | case 2400: arg = DIGI_BAUD_2400; break; |
| 722 | case 4800: arg = DIGI_BAUD_4800; break; |
| 723 | case 9600: arg = DIGI_BAUD_9600; break; |
| 724 | case 19200: arg = DIGI_BAUD_19200; break; |
| 725 | case 38400: arg = DIGI_BAUD_38400; break; |
| 726 | case 57600: arg = DIGI_BAUD_57600; break; |
| 727 | case 115200: arg = DIGI_BAUD_115200; break; |
| 728 | case 230400: arg = DIGI_BAUD_230400; break; |
| 729 | case 460800: arg = DIGI_BAUD_460800; break; |
| 730 | default: |
| 731 | arg = DIGI_BAUD_9600; |
| 732 | baud = 9600; |
| 733 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 735 | if (arg != -1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | buf[i++] = DIGI_CMD_SET_BAUD_RATE; |
| 737 | buf[i++] = priv->dp_port_num; |
| 738 | buf[i++] = arg; |
| 739 | buf[i++] = 0; |
| 740 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | /* set parity */ |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 743 | tty->termios.c_cflag &= ~CMSPAR; |
Alan Cox | 7fa36a9 | 2007-10-18 01:24:19 -0700 | [diff] [blame] | 744 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 745 | if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) { |
| 746 | if (cflag&PARENB) { |
| 747 | if (cflag&PARODD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | arg = DIGI_PARITY_ODD; |
| 749 | else |
| 750 | arg = DIGI_PARITY_EVEN; |
| 751 | } else { |
| 752 | arg = DIGI_PARITY_NONE; |
| 753 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | buf[i++] = DIGI_CMD_SET_PARITY; |
| 755 | buf[i++] = priv->dp_port_num; |
| 756 | buf[i++] = arg; |
| 757 | buf[i++] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | /* set word size */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 760 | if ((cflag&CSIZE) != (old_cflag&CSIZE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | arg = -1; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 762 | switch (cflag&CSIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | case CS5: arg = DIGI_WORD_SIZE_5; break; |
| 764 | case CS6: arg = DIGI_WORD_SIZE_6; break; |
| 765 | case CS7: arg = DIGI_WORD_SIZE_7; break; |
| 766 | case CS8: arg = DIGI_WORD_SIZE_8; break; |
| 767 | default: |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 768 | dev_dbg(dev, |
| 769 | "digi_set_termios: can't handle word size %d\n", |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 770 | (cflag&CSIZE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | break; |
| 772 | } |
| 773 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 774 | if (arg != -1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | buf[i++] = DIGI_CMD_SET_WORD_SIZE; |
| 776 | buf[i++] = priv->dp_port_num; |
| 777 | buf[i++] = arg; |
| 778 | buf[i++] = 0; |
| 779 | } |
| 780 | |
| 781 | } |
| 782 | |
| 783 | /* set stop bits */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 784 | if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 786 | if ((cflag&CSTOPB)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | arg = DIGI_STOP_BITS_2; |
| 788 | else |
| 789 | arg = DIGI_STOP_BITS_1; |
| 790 | |
| 791 | buf[i++] = DIGI_CMD_SET_STOP_BITS; |
| 792 | buf[i++] = priv->dp_port_num; |
| 793 | buf[i++] = arg; |
| 794 | buf[i++] = 0; |
| 795 | |
| 796 | } |
| 797 | |
| 798 | /* set input flow control */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 799 | if ((iflag&IXOFF) != (old_iflag&IXOFF) |
| 800 | || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | arg = 0; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 802 | if (iflag&IXOFF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
| 804 | else |
| 805 | arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
| 806 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 807 | if (cflag&CRTSCTS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | arg |= DIGI_INPUT_FLOW_CONTROL_RTS; |
| 809 | |
| 810 | /* On USB-4 it is necessary to assert RTS prior */ |
| 811 | /* to selecting RTS input flow control. */ |
| 812 | buf[i++] = DIGI_CMD_SET_RTS_SIGNAL; |
| 813 | buf[i++] = priv->dp_port_num; |
| 814 | buf[i++] = DIGI_RTS_ACTIVE; |
| 815 | buf[i++] = 0; |
| 816 | |
| 817 | } else { |
| 818 | arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS; |
| 819 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
| 821 | buf[i++] = priv->dp_port_num; |
| 822 | buf[i++] = arg; |
| 823 | buf[i++] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | } |
| 825 | |
| 826 | /* set output flow control */ |
Alan Cox | 7fa36a9 | 2007-10-18 01:24:19 -0700 | [diff] [blame] | 827 | if ((iflag & IXON) != (old_iflag & IXON) |
| 828 | || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | arg = 0; |
Alan Cox | 7fa36a9 | 2007-10-18 01:24:19 -0700 | [diff] [blame] | 830 | if (iflag & IXON) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
| 832 | else |
| 833 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
| 834 | |
Alan Cox | 7fa36a9 | 2007-10-18 01:24:19 -0700 | [diff] [blame] | 835 | if (cflag & CRTSCTS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; |
| 837 | } else { |
| 838 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 839 | tty->hw_stopped = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | } |
| 841 | |
| 842 | buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; |
| 843 | buf[i++] = priv->dp_port_num; |
| 844 | buf[i++] = arg; |
| 845 | buf[i++] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | /* set receive enable/disable */ |
Alan Cox | 7fa36a9 | 2007-10-18 01:24:19 -0700 | [diff] [blame] | 849 | if ((cflag & CREAD) != (old_cflag & CREAD)) { |
| 850 | if (cflag & CREAD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | arg = DIGI_ENABLE; |
| 852 | else |
| 853 | arg = DIGI_DISABLE; |
| 854 | |
| 855 | buf[i++] = DIGI_CMD_RECEIVE_ENABLE; |
| 856 | buf[i++] = priv->dp_port_num; |
| 857 | buf[i++] = arg; |
| 858 | buf[i++] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | } |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 860 | ret = digi_write_oob_command(port, buf, i, 1); |
| 861 | if (ret != 0) |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 862 | dev_dbg(dev, "digi_set_termios: write oob failed, ret=%d\n", ret); |
Alan Cox | 7fa36a9 | 2007-10-18 01:24:19 -0700 | [diff] [blame] | 863 | tty_encode_baud_rate(tty, baud, baud); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | } |
| 865 | |
| 866 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 867 | static void digi_break_ctl(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 869 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | unsigned char buf[4]; |
| 871 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | buf[0] = DIGI_CMD_BREAK_CONTROL; |
| 873 | buf[1] = 2; /* length */ |
| 874 | buf[2] = break_state ? 1 : 0; |
| 875 | buf[3] = 0; /* pad */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 876 | digi_write_inb_command(port, buf, 4, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | } |
| 878 | |
| 879 | |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 880 | static int digi_tiocmget(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 882 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | struct digi_port *priv = usb_get_serial_port_data(port); |
| 884 | unsigned int val; |
| 885 | unsigned long flags; |
| 886 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 887 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | val = priv->dp_modem_signals; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 889 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | return val; |
| 891 | } |
| 892 | |
| 893 | |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 894 | static int digi_tiocmset(struct tty_struct *tty, |
| 895 | unsigned int set, unsigned int clear) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 897 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | struct digi_port *priv = usb_get_serial_port_data(port); |
| 899 | unsigned int val; |
| 900 | unsigned long flags; |
| 901 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 902 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | val = (priv->dp_modem_signals & ~clear) | set; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 904 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
| 905 | return digi_set_modem_signals(port, val, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | } |
| 907 | |
| 908 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 909 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
| 910 | const unsigned char *buf, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | { |
| 912 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 913 | int ret, data_len, new_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | struct digi_port *priv = usb_get_serial_port_data(port); |
| 915 | unsigned char *data = port->write_urb->transfer_buffer; |
| 916 | unsigned long flags = 0; |
| 917 | |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 918 | dev_dbg(&port->dev, |
| 919 | "digi_write: TOP: port=%d, count=%d, in_interrupt=%ld\n", |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 920 | priv->dp_port_num, count, in_interrupt()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
| 922 | /* copy user data (which can sleep) before getting spin lock */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 923 | count = min(count, port->bulk_out_size-2); |
| 924 | count = min(64, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
| 926 | /* be sure only one write proceeds at a time */ |
| 927 | /* there are races on the port private buffer */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 928 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
| 930 | /* wait for urb status clear to submit another urb */ |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 931 | if (priv->dp_write_urb_in_use) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | /* buffer data if count is 1 (probably put_char) if possible */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 933 | if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; |
| 935 | new_len = 1; |
| 936 | } else { |
| 937 | new_len = 0; |
| 938 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 939 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
| 940 | return new_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | /* allow space for any buffered data and for new data, up to */ |
| 944 | /* transfer buffer size - 2 (for command and length bytes) */ |
| 945 | new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
| 946 | data_len = new_len + priv->dp_out_buf_len; |
| 947 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 948 | if (data_len == 0) { |
| 949 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
| 950 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | } |
| 952 | |
| 953 | port->write_urb->transfer_buffer_length = data_len+2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | |
| 955 | *data++ = DIGI_CMD_SEND_DATA; |
| 956 | *data++ = data_len; |
| 957 | |
| 958 | /* copy in buffered data first */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 959 | memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | data += priv->dp_out_buf_len; |
| 961 | |
| 962 | /* copy in new data */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 963 | memcpy(data, buf, new_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 965 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
| 966 | if (ret == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | priv->dp_write_urb_in_use = 1; |
| 968 | ret = new_len; |
| 969 | priv->dp_out_buf_len = 0; |
| 970 | } |
| 971 | |
| 972 | /* return length of new data written, or error */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 973 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
| 974 | if (ret < 0) |
Johan Hovold | 22a416c | 2012-02-10 13:20:51 +0100 | [diff] [blame] | 975 | dev_err_console(port, |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 976 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 977 | __func__, ret, priv->dp_port_num); |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 978 | dev_dbg(&port->dev, "digi_write: returning %d\n", ret); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 979 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 981 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 983 | static void digi_write_bulk_callback(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | { |
| 985 | |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 986 | struct usb_serial_port *port = urb->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | struct usb_serial *serial; |
| 988 | struct digi_port *priv; |
| 989 | struct digi_serial *serial_priv; |
| 990 | int ret = 0; |
Greg Kroah-Hartman | 85d7510 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 991 | int status = urb->status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | /* port and serial sanity check */ |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 994 | if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { |
Julia Lawall | 109f34e | 2010-05-27 14:32:09 +0200 | [diff] [blame] | 995 | pr_err("%s: port or port->private is NULL, status=%d\n", |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 996 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | return; |
| 998 | } |
| 999 | serial = port->serial; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1000 | if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1001 | dev_err(&port->dev, |
| 1002 | "%s: serial or serial->private is NULL, status=%d\n", |
| 1003 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | return; |
| 1005 | } |
| 1006 | |
| 1007 | /* handle oob callback */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1008 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 1009 | dev_dbg(&port->dev, "digi_write_bulk_callback: oob callback\n"); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1010 | spin_lock(&priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | priv->dp_write_urb_in_use = 0; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1012 | wake_up_interruptible(&port->write_wait); |
| 1013 | spin_unlock(&priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | return; |
| 1015 | } |
| 1016 | |
Alan Stern | 1f87158 | 2010-02-17 10:05:47 -0500 | [diff] [blame] | 1017 | /* try to send any buffered data on this port */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1018 | spin_lock(&priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | priv->dp_write_urb_in_use = 0; |
Alan Stern | 1f87158 | 2010-02-17 10:05:47 -0500 | [diff] [blame] | 1020 | if (priv->dp_out_buf_len > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | *((unsigned char *)(port->write_urb->transfer_buffer)) |
| 1022 | = (unsigned char)DIGI_CMD_SEND_DATA; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1023 | *((unsigned char *)(port->write_urb->transfer_buffer) + 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | = (unsigned char)priv->dp_out_buf_len; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1025 | port->write_urb->transfer_buffer_length = |
| 1026 | priv->dp_out_buf_len + 2; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1027 | memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1028 | priv->dp_out_buf_len); |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1029 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
| 1030 | if (ret == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | priv->dp_write_urb_in_use = 1; |
| 1032 | priv->dp_out_buf_len = 0; |
| 1033 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | /* wake up processes sleeping on writes immediately */ |
Jiri Slaby | 6aad04f | 2013-03-07 13:12:29 +0100 | [diff] [blame^] | 1036 | tty_port_tty_wakeup(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | /* also queue up a wakeup at scheduler time, in case we */ |
| 1038 | /* lost the race in write_chan(). */ |
| 1039 | schedule_work(&priv->dp_wakeup_work); |
| 1040 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1041 | spin_unlock(&priv->dp_port_lock); |
Alan Stern | 1f87158 | 2010-02-17 10:05:47 -0500 | [diff] [blame] | 1042 | if (ret && ret != -EPERM) |
Johan Hovold | 22a416c | 2012-02-10 13:20:51 +0100 | [diff] [blame] | 1043 | dev_err_console(port, |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1044 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1045 | __func__, ret, priv->dp_port_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | } |
| 1047 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1048 | static int digi_write_room(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1050 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | struct digi_port *priv = usb_get_serial_port_data(port); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1052 | int room; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | unsigned long flags = 0; |
| 1054 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1055 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 1057 | if (priv->dp_write_urb_in_use) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | room = 0; |
| 1059 | else |
| 1060 | room = port->bulk_out_size - 2 - priv->dp_out_buf_len; |
| 1061 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1062 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 1063 | dev_dbg(&port->dev, "digi_write_room: port=%d, room=%d\n", priv->dp_port_num, room); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1064 | return room; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
| 1066 | } |
| 1067 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1068 | static int digi_chars_in_buffer(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1070 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | struct digi_port *priv = usb_get_serial_port_data(port); |
| 1072 | |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 1073 | if (priv->dp_write_urb_in_use) { |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 1074 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1075 | priv->dp_port_num, port->bulk_out_size - 2); |
| 1076 | /* return(port->bulk_out_size - 2); */ |
| 1077 | return 256; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | } else { |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 1079 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1080 | priv->dp_port_num, priv->dp_out_buf_len); |
| 1081 | return priv->dp_out_buf_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | } |
| 1083 | |
| 1084 | } |
| 1085 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1086 | static void digi_dtr_rts(struct usb_serial_port *port, int on) |
| 1087 | { |
| 1088 | /* Adjust DTR and RTS */ |
| 1089 | digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1); |
| 1090 | } |
| 1091 | |
Alan Cox | a509a7e | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 1092 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | int ret; |
| 1095 | unsigned char buf[32]; |
| 1096 | struct digi_port *priv = usb_get_serial_port_data(port); |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1097 | struct ktermios not_termios; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | /* be sure the device is started up */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1100 | if (digi_startup_device(port->serial) != 0) |
| 1101 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | /* read modem signals automatically whenever they change */ |
| 1104 | buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; |
| 1105 | buf[1] = priv->dp_port_num; |
| 1106 | buf[2] = DIGI_ENABLE; |
| 1107 | buf[3] = 0; |
| 1108 | |
| 1109 | /* flush fifos */ |
| 1110 | buf[4] = DIGI_CMD_IFLUSH_FIFO; |
| 1111 | buf[5] = priv->dp_port_num; |
| 1112 | buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; |
| 1113 | buf[7] = 0; |
| 1114 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1115 | ret = digi_write_oob_command(port, buf, 8, 1); |
| 1116 | if (ret != 0) |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 1117 | dev_dbg(&port->dev, "digi_open: write oob failed, ret=%d\n", ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | |
| 1119 | /* set termios settings */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1120 | if (tty) { |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 1121 | not_termios.c_cflag = ~tty->termios.c_cflag; |
| 1122 | not_termios.c_iflag = ~tty->termios.c_iflag; |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1123 | digi_set_termios(tty, port, ¬_termios); |
| 1124 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1125 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | } |
| 1127 | |
| 1128 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1129 | static void digi_close(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | { |
| 1131 | DEFINE_WAIT(wait); |
| 1132 | int ret; |
| 1133 | unsigned char buf[32]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | struct digi_port *priv = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | |
Oliver Neukum | 0915f49 | 2008-01-23 12:28:45 +0100 | [diff] [blame] | 1136 | mutex_lock(&port->serial->disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | /* if disconnected, just clear flags */ |
Oliver Neukum | 0915f49 | 2008-01-23 12:28:45 +0100 | [diff] [blame] | 1138 | if (port->serial->disconnected) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | goto exit; |
| 1140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | if (port->serial->dev) { |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1142 | /* FIXME: Transmit idle belongs in the wait_unti_sent path */ |
| 1143 | digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | |
| 1145 | /* disable input flow control */ |
| 1146 | buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
| 1147 | buf[1] = priv->dp_port_num; |
| 1148 | buf[2] = DIGI_DISABLE; |
| 1149 | buf[3] = 0; |
| 1150 | |
| 1151 | /* disable output flow control */ |
| 1152 | buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; |
| 1153 | buf[5] = priv->dp_port_num; |
| 1154 | buf[6] = DIGI_DISABLE; |
| 1155 | buf[7] = 0; |
| 1156 | |
| 1157 | /* disable reading modem signals automatically */ |
| 1158 | buf[8] = DIGI_CMD_READ_INPUT_SIGNALS; |
| 1159 | buf[9] = priv->dp_port_num; |
| 1160 | buf[10] = DIGI_DISABLE; |
| 1161 | buf[11] = 0; |
| 1162 | |
| 1163 | /* disable receive */ |
| 1164 | buf[12] = DIGI_CMD_RECEIVE_ENABLE; |
| 1165 | buf[13] = priv->dp_port_num; |
| 1166 | buf[14] = DIGI_DISABLE; |
| 1167 | buf[15] = 0; |
| 1168 | |
| 1169 | /* flush fifos */ |
| 1170 | buf[16] = DIGI_CMD_IFLUSH_FIFO; |
| 1171 | buf[17] = priv->dp_port_num; |
| 1172 | buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; |
| 1173 | buf[19] = 0; |
| 1174 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1175 | ret = digi_write_oob_command(port, buf, 20, 0); |
| 1176 | if (ret != 0) |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 1177 | dev_dbg(&port->dev, "digi_close: write oob failed, ret=%d\n", ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | |
| 1179 | /* wait for final commands on oob port to complete */ |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1180 | prepare_to_wait(&priv->dp_flush_wait, &wait, |
| 1181 | TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | schedule_timeout(DIGI_CLOSE_TIMEOUT); |
| 1183 | finish_wait(&priv->dp_flush_wait, &wait); |
| 1184 | |
| 1185 | /* shutdown any outstanding bulk writes */ |
| 1186 | usb_kill_urb(port->write_urb); |
| 1187 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | exit: |
Oliver Neukum | 0915f49 | 2008-01-23 12:28:45 +0100 | [diff] [blame] | 1189 | spin_lock_irq(&priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | priv->dp_write_urb_in_use = 0; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1191 | wake_up_interruptible(&priv->dp_close_wait); |
Oliver Neukum | 0915f49 | 2008-01-23 12:28:45 +0100 | [diff] [blame] | 1192 | spin_unlock_irq(&priv->dp_port_lock); |
| 1193 | mutex_unlock(&port->serial->disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | } |
| 1195 | |
| 1196 | |
| 1197 | /* |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1198 | * Digi Startup Device |
| 1199 | * |
| 1200 | * Starts reads on all ports. Must be called AFTER startup, with |
| 1201 | * urbs initialized. Returns 0 if successful, non-zero error otherwise. |
| 1202 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1204 | static int digi_startup_device(struct usb_serial *serial) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | { |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1206 | int i, ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | struct digi_serial *serial_priv = usb_get_serial_data(serial); |
| 1208 | struct usb_serial_port *port; |
| 1209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | /* be sure this happens exactly once */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1211 | spin_lock(&serial_priv->ds_serial_lock); |
| 1212 | if (serial_priv->ds_device_started) { |
| 1213 | spin_unlock(&serial_priv->ds_serial_lock); |
| 1214 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | } |
| 1216 | serial_priv->ds_device_started = 1; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1217 | spin_unlock(&serial_priv->ds_serial_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | |
| 1219 | /* start reading from each bulk in endpoint for the device */ |
| 1220 | /* set USB_DISABLE_SPD flag for write bulk urbs */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1221 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | port = serial->port[i]; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1223 | ret = usb_submit_urb(port->read_urb, GFP_KERNEL); |
| 1224 | if (ret != 0) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1225 | dev_err(&port->dev, |
| 1226 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
| 1227 | __func__, ret, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | break; |
| 1229 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1231 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | } |
| 1233 | |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 1234 | static int digi_port_init(struct usb_serial_port *port, unsigned port_num) |
| 1235 | { |
| 1236 | struct digi_port *priv; |
| 1237 | |
| 1238 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
| 1239 | if (!priv) |
| 1240 | return -ENOMEM; |
| 1241 | |
| 1242 | spin_lock_init(&priv->dp_port_lock); |
| 1243 | priv->dp_port_num = port_num; |
| 1244 | init_waitqueue_head(&priv->dp_modem_change_wait); |
| 1245 | init_waitqueue_head(&priv->dp_transmit_idle_wait); |
| 1246 | init_waitqueue_head(&priv->dp_flush_wait); |
| 1247 | init_waitqueue_head(&priv->dp_close_wait); |
| 1248 | INIT_WORK(&priv->dp_wakeup_work, digi_wakeup_write_lock); |
| 1249 | priv->dp_port = port; |
| 1250 | |
| 1251 | init_waitqueue_head(&port->write_wait); |
| 1252 | |
| 1253 | usb_set_serial_port_data(port, priv); |
| 1254 | |
| 1255 | return 0; |
| 1256 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1258 | static int digi_startup(struct usb_serial *serial) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | struct digi_serial *serial_priv; |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 1261 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 1263 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); |
| 1264 | if (!serial_priv) |
| 1265 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1267 | spin_lock_init(&serial_priv->ds_serial_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | serial_priv->ds_oob_port_num = serial->type->num_ports; |
| 1269 | serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 1270 | |
| 1271 | ret = digi_port_init(serial_priv->ds_oob_port, |
| 1272 | serial_priv->ds_oob_port_num); |
| 1273 | if (ret) { |
| 1274 | kfree(serial_priv); |
| 1275 | return ret; |
| 1276 | } |
| 1277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | usb_set_serial_data(serial, serial_priv); |
| 1279 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1280 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | } |
| 1282 | |
| 1283 | |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 1284 | static void digi_disconnect(struct usb_serial *serial) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | |
| 1288 | /* stop reads and writes on all ports */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1289 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | usb_kill_urb(serial->port[i]->read_urb); |
| 1291 | usb_kill_urb(serial->port[i]->write_urb); |
| 1292 | } |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 1293 | } |
| 1294 | |
| 1295 | |
| 1296 | static void digi_release(struct usb_serial *serial) |
| 1297 | { |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 1298 | struct digi_serial *serial_priv; |
| 1299 | struct digi_port *priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 1301 | serial_priv = usb_get_serial_data(serial); |
| 1302 | |
| 1303 | priv = usb_get_serial_port_data(serial_priv->ds_oob_port); |
| 1304 | kfree(priv); |
| 1305 | |
| 1306 | kfree(serial_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | } |
| 1308 | |
Johan Hovold | fb44ff8 | 2012-10-25 10:29:04 +0200 | [diff] [blame] | 1309 | static int digi_port_probe(struct usb_serial_port *port) |
| 1310 | { |
| 1311 | unsigned port_num; |
| 1312 | |
| 1313 | port_num = port->number - port->serial->minor; |
| 1314 | |
| 1315 | return digi_port_init(port, port_num); |
| 1316 | } |
| 1317 | |
| 1318 | static int digi_port_remove(struct usb_serial_port *port) |
| 1319 | { |
| 1320 | struct digi_port *priv; |
| 1321 | |
| 1322 | priv = usb_get_serial_port_data(port); |
| 1323 | kfree(priv); |
| 1324 | |
| 1325 | return 0; |
| 1326 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1328 | static void digi_read_bulk_callback(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 1330 | struct usb_serial_port *port = urb->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | struct digi_port *priv; |
| 1332 | struct digi_serial *serial_priv; |
| 1333 | int ret; |
Greg Kroah-Hartman | 85d7510 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1334 | int status = urb->status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | /* port sanity check, do not resubmit if port is not valid */ |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1337 | if (port == NULL) |
| 1338 | return; |
| 1339 | priv = usb_get_serial_port_data(port); |
| 1340 | if (priv == NULL) { |
| 1341 | dev_err(&port->dev, "%s: port->private is NULL, status=%d\n", |
| 1342 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | return; |
| 1344 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1345 | if (port->serial == NULL || |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1346 | (serial_priv = usb_get_serial_data(port->serial)) == NULL) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1347 | dev_err(&port->dev, "%s: serial is bad or serial->private " |
| 1348 | "is NULL, status=%d\n", __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | return; |
| 1350 | } |
| 1351 | |
| 1352 | /* do not resubmit urb if it has any status error */ |
Greg Kroah-Hartman | 85d7510 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1353 | if (status) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1354 | dev_err(&port->dev, |
| 1355 | "%s: nonzero read bulk status: status=%d, port=%d\n", |
| 1356 | __func__, status, priv->dp_port_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | return; |
| 1358 | } |
| 1359 | |
| 1360 | /* handle oob or inb callback, do not resubmit if error */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1361 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
| 1362 | if (digi_read_oob_callback(urb) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | return; |
| 1364 | } else { |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1365 | if (digi_read_inb_callback(urb) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | return; |
| 1367 | } |
| 1368 | |
| 1369 | /* continue read */ |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1370 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
Alan Stern | 1f87158 | 2010-02-17 10:05:47 -0500 | [diff] [blame] | 1371 | if (ret != 0 && ret != -EPERM) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1372 | dev_err(&port->dev, |
| 1373 | "%s: failed resubmitting urb, ret=%d, port=%d\n", |
| 1374 | __func__, ret, priv->dp_port_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | } |
| 1376 | |
| 1377 | } |
| 1378 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1379 | /* |
| 1380 | * Digi Read INB Callback |
| 1381 | * |
| 1382 | * Digi Read INB Callback handles reads on the in band ports, sending |
| 1383 | * the data on to the tty subsystem. When called we know port and |
| 1384 | * port->private are not NULL and port->serial has been validated. |
| 1385 | * It returns 0 if successful, 1 if successful but the port is |
| 1386 | * throttled, and -1 if the sanity checks failed. |
| 1387 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1389 | static int digi_read_inb_callback(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 1391 | struct usb_serial_port *port = urb->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | struct digi_port *priv = usb_get_serial_port_data(port); |
| 1393 | int opcode = ((unsigned char *)urb->transfer_buffer)[0]; |
| 1394 | int len = ((unsigned char *)urb->transfer_buffer)[1]; |
Greg Kroah-Hartman | 85d7510 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1395 | int port_status = ((unsigned char *)urb->transfer_buffer)[2]; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1396 | unsigned char *data = ((unsigned char *)urb->transfer_buffer) + 3; |
| 1397 | int flag, throttled; |
Greg Kroah-Hartman | 85d7510 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1398 | int status = urb->status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | |
| 1400 | /* do not process callbacks on closed ports */ |
| 1401 | /* but do continue the read chain */ |
Alan Stern | 1f87158 | 2010-02-17 10:05:47 -0500 | [diff] [blame] | 1402 | if (urb->status == -ENOENT) |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1403 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | |
| 1405 | /* short/multiple packet check */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1406 | if (urb->actual_length != len + 2) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1407 | dev_err(&port->dev, "%s: INCOMPLETE OR MULTIPLE PACKET, " |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 1408 | "status=%d, port=%d, opcode=%d, len=%d, " |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1409 | "actual_length=%d, status=%d\n", __func__, status, |
| 1410 | priv->dp_port_num, opcode, len, urb->actual_length, |
| 1411 | port_status); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1412 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | } |
| 1414 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1415 | spin_lock(&priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | |
| 1417 | /* check for throttle; if set, do not resubmit read urb */ |
| 1418 | /* indicate the read chain needs to be restarted on unthrottle */ |
| 1419 | throttled = priv->dp_throttled; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1420 | if (throttled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | priv->dp_throttle_restart = 1; |
| 1422 | |
| 1423 | /* receive data */ |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 1424 | if (opcode == DIGI_CMD_RECEIVE_DATA) { |
Greg Kroah-Hartman | 85d7510 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1425 | /* get flag from port_status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | flag = 0; |
| 1427 | |
| 1428 | /* overrun is special, not associated with a char */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1429 | if (port_status & DIGI_OVERRUN_ERROR) |
Jiri Slaby | 92a19f9 | 2013-01-03 15:53:03 +0100 | [diff] [blame] | 1430 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | |
| 1432 | /* break takes precedence over parity, */ |
| 1433 | /* which takes precedence over framing errors */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1434 | if (port_status & DIGI_BREAK_ERROR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | flag = TTY_BREAK; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1436 | else if (port_status & DIGI_PARITY_ERROR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | flag = TTY_PARITY; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1438 | else if (port_status & DIGI_FRAMING_ERROR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
Greg Kroah-Hartman | 85d7510 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1441 | /* data length is len-1 (one byte of len is port_status) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | --len; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1443 | if (len > 0) { |
Jiri Slaby | 2f69335 | 2013-01-03 15:53:02 +0100 | [diff] [blame] | 1444 | tty_insert_flip_string_fixed_flag(&port->port, data, |
| 1445 | flag, len); |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 1446 | tty_flip_buffer_push(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1449 | spin_unlock(&priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1451 | if (opcode == DIGI_CMD_RECEIVE_DISABLE) |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 1452 | dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__); |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1453 | else if (opcode != DIGI_CMD_RECEIVE_DATA) |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 1454 | dev_dbg(&port->dev, "%s: unknown opcode: %d\n", __func__, opcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1456 | return throttled ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
| 1458 | } |
| 1459 | |
| 1460 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1461 | /* |
| 1462 | * Digi Read OOB Callback |
| 1463 | * |
| 1464 | * Digi Read OOB Callback handles reads on the out of band port. |
| 1465 | * When called we know port and port->private are not NULL and |
| 1466 | * the port->serial is valid. It returns 0 if successful, and |
| 1467 | * -1 if the sanity checks failed. |
| 1468 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1470 | static int digi_read_oob_callback(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | { |
| 1472 | |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 1473 | struct usb_serial_port *port = urb->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | struct usb_serial *serial = port->serial; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1475 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | struct digi_port *priv = usb_get_serial_port_data(port); |
| 1477 | int opcode, line, status, val; |
| 1478 | int i; |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1479 | unsigned int rts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | /* handle each oob command */ |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1482 | for (i = 0; i < urb->actual_length - 3;) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | opcode = ((unsigned char *)urb->transfer_buffer)[i++]; |
| 1484 | line = ((unsigned char *)urb->transfer_buffer)[i++]; |
| 1485 | status = ((unsigned char *)urb->transfer_buffer)[i++]; |
| 1486 | val = ((unsigned char *)urb->transfer_buffer)[i++]; |
| 1487 | |
Greg Kroah-Hartman | f9dfbeb | 2012-09-14 09:47:39 -0700 | [diff] [blame] | 1488 | dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n", |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1489 | opcode, line, status, val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1491 | if (status != 0 || line >= serial->type->num_ports) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | continue; |
| 1493 | |
| 1494 | port = serial->port[line]; |
| 1495 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1496 | priv = usb_get_serial_port_data(port); |
| 1497 | if (priv == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | return -1; |
| 1499 | |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1500 | tty = tty_port_tty_get(&port->port); |
Alan Cox | 4287341 | 2010-05-19 13:01:56 +0100 | [diff] [blame] | 1501 | |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1502 | rts = 0; |
Alan Cox | 4287341 | 2010-05-19 13:01:56 +0100 | [diff] [blame] | 1503 | if (tty) |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 1504 | rts = tty->termios.c_cflag & CRTSCTS; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1505 | |
Alan Cox | 4287341 | 2010-05-19 13:01:56 +0100 | [diff] [blame] | 1506 | if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1507 | spin_lock(&priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | /* convert from digi flags to termiox flags */ |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1509 | if (val & DIGI_READ_INPUT_SIGNALS_CTS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | priv->dp_modem_signals |= TIOCM_CTS; |
| 1511 | /* port must be open to use tty struct */ |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1512 | if (rts) { |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1513 | tty->hw_stopped = 0; |
Jiri Slaby | 6aad04f | 2013-03-07 13:12:29 +0100 | [diff] [blame^] | 1514 | tty_port_tty_wakeup(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | } |
| 1516 | } else { |
| 1517 | priv->dp_modem_signals &= ~TIOCM_CTS; |
| 1518 | /* port must be open to use tty struct */ |
Alan Cox | 41ad427 | 2008-07-22 11:11:02 +0100 | [diff] [blame] | 1519 | if (rts) |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1520 | tty->hw_stopped = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1522 | if (val & DIGI_READ_INPUT_SIGNALS_DSR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | priv->dp_modem_signals |= TIOCM_DSR; |
| 1524 | else |
| 1525 | priv->dp_modem_signals &= ~TIOCM_DSR; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1526 | if (val & DIGI_READ_INPUT_SIGNALS_RI) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | priv->dp_modem_signals |= TIOCM_RI; |
| 1528 | else |
| 1529 | priv->dp_modem_signals &= ~TIOCM_RI; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1530 | if (val & DIGI_READ_INPUT_SIGNALS_DCD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | priv->dp_modem_signals |= TIOCM_CD; |
| 1532 | else |
| 1533 | priv->dp_modem_signals &= ~TIOCM_CD; |
| 1534 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1535 | wake_up_interruptible(&priv->dp_modem_change_wait); |
| 1536 | spin_unlock(&priv->dp_port_lock); |
| 1537 | } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) { |
| 1538 | spin_lock(&priv->dp_port_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | priv->dp_transmit_idle = 1; |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1540 | wake_up_interruptible(&priv->dp_transmit_idle_wait); |
| 1541 | spin_unlock(&priv->dp_port_lock); |
| 1542 | } else if (opcode == DIGI_CMD_IFLUSH_FIFO) { |
| 1543 | wake_up_interruptible(&priv->dp_flush_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | } |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1545 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | } |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1547 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | |
| 1549 | } |
| 1550 | |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1551 | module_usb_serial_driver(serial_drivers, id_table_combined); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | |
Alan Cox | c6d6126 | 2007-07-26 18:57:52 +0100 | [diff] [blame] | 1553 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1554 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | MODULE_LICENSE("GPL"); |