Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * USB IR Dongle driver |
| 3 | * |
| 4 | * Copyright (C) 2001-2002 Greg Kroah-Hartman (greg@kroah.com) |
| 5 | * Copyright (C) 2002 Gary Brubaker (xavyer@ix.netcom.com) |
Johan Hovold | f4a4cbb | 2010-05-13 21:02:03 +0200 | [diff] [blame] | 6 | * Copyright (C) 2010 Johan Hovold (jhovold@gmail.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This driver allows a USB IrDA device to be used as a "dumb" serial device. |
| 14 | * This can be useful if you do not have access to a full IrDA stack on the |
| 15 | * other side of the connection. If you do have an IrDA stack on both devices, |
| 16 | * please use the usb-irda driver, as it contains the proper error checking and |
| 17 | * other goodness of a full IrDA stack. |
| 18 | * |
| 19 | * Portions of this driver were taken from drivers/net/irda/irda-usb.c, which |
| 20 | * was written by Roman Weissgaerber <weissg@vienna.at>, Dag Brattli |
| 21 | * <dag@brattli.net>, and Jean Tourrilhes <jt@hpl.hp.com> |
| 22 | * |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 23 | * See Documentation/usb/usb-serial.txt for more information on using this |
| 24 | * driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | */ |
| 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/kernel.h> |
| 28 | #include <linux/errno.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/tty.h> |
| 32 | #include <linux/tty_driver.h> |
| 33 | #include <linux/tty_flip.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/spinlock.h> |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 36 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 38 | #include <linux/usb/serial.h> |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 39 | #include <linux/usb/irda.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Johan Hovold | f4a4cbb | 2010-05-13 21:02:03 +0200 | [diff] [blame] | 41 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Johan Hovold <jhovold@gmail.com>" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #define DRIVER_DESC "USB IR Dongle driver" |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | /* if overridden by the user, then use their value for the size of the read and |
| 45 | * write urbs */ |
| 46 | static int buffer_size; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | /* if overridden by the user, then use the specified number of XBOFs */ |
| 49 | static int xbof = -1; |
| 50 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 51 | static int ir_startup (struct usb_serial *serial); |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 52 | static int ir_write(struct tty_struct *tty, struct usb_serial_port *port, |
| 53 | const unsigned char *buf, int count); |
| 54 | static int ir_write_room(struct tty_struct *tty); |
| 55 | static void ir_write_bulk_callback(struct urb *urb); |
Johan Hovold | f4a4cbb | 2010-05-13 21:02:03 +0200 | [diff] [blame] | 56 | static void ir_process_read_urb(struct urb *urb); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 57 | static void ir_set_termios(struct tty_struct *tty, |
| 58 | struct usb_serial_port *port, struct ktermios *old_termios); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Alan Cox | a6ea438 | 2007-06-22 14:44:54 +0100 | [diff] [blame] | 60 | /* Not that this lot means you can only have one per system */ |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 61 | static u8 ir_baud; |
| 62 | static u8 ir_xbof; |
| 63 | static u8 ir_add_bof; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Németh Márton | 7d40d7e | 2010-01-10 15:34:24 +0100 | [diff] [blame] | 65 | static const struct usb_device_id ir_id_table[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { USB_DEVICE(0x050f, 0x0180) }, /* KC Technology, KC-180 */ |
| 67 | { USB_DEVICE(0x08e9, 0x0100) }, /* XTNDAccess */ |
| 68 | { USB_DEVICE(0x09c4, 0x0011) }, /* ACTiSys ACT-IR2000U */ |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 69 | { USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, USB_SUBCLASS_IRDA, 0) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | { } /* Terminating entry */ |
| 71 | }; |
| 72 | |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 73 | MODULE_DEVICE_TABLE(usb, ir_id_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 75 | static struct usb_serial_driver ir_device = { |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 76 | .driver = { |
| 77 | .owner = THIS_MODULE, |
| 78 | .name = "ir-usb", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 79 | }, |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 80 | .description = "IR Dongle", |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 81 | .id_table = ir_id_table, |
| 82 | .num_ports = 1, |
| 83 | .set_termios = ir_set_termios, |
| 84 | .attach = ir_startup, |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 85 | .write = ir_write, |
| 86 | .write_room = ir_write_room, |
| 87 | .write_bulk_callback = ir_write_bulk_callback, |
Johan Hovold | f4a4cbb | 2010-05-13 21:02:03 +0200 | [diff] [blame] | 88 | .process_read_urb = ir_process_read_urb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | }; |
| 90 | |
Alan Stern | 7dbe246 | 2012-02-23 14:56:57 -0500 | [diff] [blame] | 91 | static struct usb_serial_driver * const serial_drivers[] = { |
| 92 | &ir_device, NULL |
| 93 | }; |
| 94 | |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 95 | static inline void irda_usb_dump_class_desc(struct usb_serial *serial, |
| 96 | struct usb_irda_cs_descriptor *desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | { |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 98 | struct device *dev = &serial->dev->dev; |
| 99 | |
| 100 | dev_dbg(dev, "bLength=%x\n", desc->bLength); |
| 101 | dev_dbg(dev, "bDescriptorType=%x\n", desc->bDescriptorType); |
| 102 | dev_dbg(dev, "bcdSpecRevision=%x\n", __le16_to_cpu(desc->bcdSpecRevision)); |
| 103 | dev_dbg(dev, "bmDataSize=%x\n", desc->bmDataSize); |
| 104 | dev_dbg(dev, "bmWindowSize=%x\n", desc->bmWindowSize); |
| 105 | dev_dbg(dev, "bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime); |
| 106 | dev_dbg(dev, "wBaudRate=%x\n", __le16_to_cpu(desc->wBaudRate)); |
| 107 | dev_dbg(dev, "bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs); |
| 108 | dev_dbg(dev, "bIrdaRateSniff=%x\n", desc->bIrdaRateSniff); |
| 109 | dev_dbg(dev, "bMaxUnicastList=%x\n", desc->bMaxUnicastList); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | /*------------------------------------------------------------------*/ |
| 113 | /* |
| 114 | * Function irda_usb_find_class_desc(dev, ifnum) |
| 115 | * |
| 116 | * Returns instance of IrDA class descriptor, or NULL if not found |
| 117 | * |
| 118 | * The class descriptor is some extra info that IrDA USB devices will |
| 119 | * offer to us, describing their IrDA characteristics. We will use that in |
| 120 | * irda_usb_init_qos() |
| 121 | * |
| 122 | * Based on the same function in drivers/net/irda/irda-usb.c |
| 123 | */ |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 124 | static struct usb_irda_cs_descriptor * |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 125 | irda_usb_find_class_desc(struct usb_serial *serial, unsigned int ifnum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 127 | struct usb_device *dev = serial->dev; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 128 | struct usb_irda_cs_descriptor *desc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | int ret; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 130 | |
| 131 | desc = kzalloc(sizeof(*desc), GFP_KERNEL); |
| 132 | if (!desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | return NULL; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 134 | |
| 135 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| 136 | USB_REQ_CS_IRDA_GET_CLASS_DESC, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| 138 | 0, ifnum, desc, sizeof(*desc), 1000); |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 139 | |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 140 | dev_dbg(&serial->dev->dev, "%s - ret=%d\n", __func__, ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | if (ret < sizeof(*desc)) { |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 142 | dev_dbg(&serial->dev->dev, |
| 143 | "%s - class descriptor read %s (%d)\n", __func__, |
| 144 | (ret < 0) ? "failed" : "too short", ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | goto error; |
| 146 | } |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 147 | if (desc->bDescriptorType != USB_DT_CS_IRDA) { |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 148 | dev_dbg(&serial->dev->dev, "%s - bad class descriptor type\n", |
| 149 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | goto error; |
| 151 | } |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 152 | |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 153 | irda_usb_dump_class_desc(serial, desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | return desc; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | error: |
| 157 | kfree(desc); |
| 158 | return NULL; |
| 159 | } |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | static u8 ir_xbof_change(u8 xbof) |
| 162 | { |
| 163 | u8 result; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | /* reference irda-usb.c */ |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 166 | switch (xbof) { |
| 167 | case 48: |
| 168 | result = 0x10; |
| 169 | break; |
| 170 | case 28: |
| 171 | case 24: |
| 172 | result = 0x20; |
| 173 | break; |
| 174 | default: |
| 175 | case 12: |
| 176 | result = 0x30; |
| 177 | break; |
| 178 | case 5: |
| 179 | case 6: |
| 180 | result = 0x40; |
| 181 | break; |
| 182 | case 3: |
| 183 | result = 0x50; |
| 184 | break; |
| 185 | case 2: |
| 186 | result = 0x60; |
| 187 | break; |
| 188 | case 1: |
| 189 | result = 0x70; |
| 190 | break; |
| 191 | case 0: |
| 192 | result = 0x80; |
| 193 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | } |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | return(result); |
| 197 | } |
| 198 | |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 199 | static int ir_startup(struct usb_serial *serial) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | { |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 201 | struct usb_irda_cs_descriptor *irda_desc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
Johan Hovold | 6e460c3 | 2020-01-22 11:15:26 +0100 | [diff] [blame] | 203 | if (serial->num_bulk_in < 1 || serial->num_bulk_out < 1) |
| 204 | return -ENODEV; |
| 205 | |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 206 | irda_desc = irda_usb_find_class_desc(serial, 0); |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 207 | if (!irda_desc) { |
| 208 | dev_err(&serial->dev->dev, |
| 209 | "IRDA class descriptor not found, device not bound\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | return -ENODEV; |
| 211 | } |
| 212 | |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 213 | dev_dbg(&serial->dev->dev, |
| 214 | "%s - Baud rates supported:%s%s%s%s%s%s%s%s%s\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 215 | __func__, |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 216 | (irda_desc->wBaudRate & USB_IRDA_BR_2400) ? " 2400" : "", |
| 217 | (irda_desc->wBaudRate & USB_IRDA_BR_9600) ? " 9600" : "", |
| 218 | (irda_desc->wBaudRate & USB_IRDA_BR_19200) ? " 19200" : "", |
| 219 | (irda_desc->wBaudRate & USB_IRDA_BR_38400) ? " 38400" : "", |
| 220 | (irda_desc->wBaudRate & USB_IRDA_BR_57600) ? " 57600" : "", |
| 221 | (irda_desc->wBaudRate & USB_IRDA_BR_115200) ? " 115200" : "", |
| 222 | (irda_desc->wBaudRate & USB_IRDA_BR_576000) ? " 576000" : "", |
| 223 | (irda_desc->wBaudRate & USB_IRDA_BR_1152000) ? " 1152000" : "", |
| 224 | (irda_desc->wBaudRate & USB_IRDA_BR_4000000) ? " 4000000" : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 226 | switch (irda_desc->bmAdditionalBOFs) { |
| 227 | case USB_IRDA_AB_48: |
| 228 | ir_add_bof = 48; |
| 229 | break; |
| 230 | case USB_IRDA_AB_24: |
| 231 | ir_add_bof = 24; |
| 232 | break; |
| 233 | case USB_IRDA_AB_12: |
| 234 | ir_add_bof = 12; |
| 235 | break; |
| 236 | case USB_IRDA_AB_6: |
| 237 | ir_add_bof = 6; |
| 238 | break; |
| 239 | case USB_IRDA_AB_3: |
| 240 | ir_add_bof = 3; |
| 241 | break; |
| 242 | case USB_IRDA_AB_2: |
| 243 | ir_add_bof = 2; |
| 244 | break; |
| 245 | case USB_IRDA_AB_1: |
| 246 | ir_add_bof = 1; |
| 247 | break; |
| 248 | case USB_IRDA_AB_0: |
| 249 | ir_add_bof = 0; |
| 250 | break; |
| 251 | default: |
| 252 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 255 | kfree(irda_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 257 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
| 259 | |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 260 | static int ir_write(struct tty_struct *tty, struct usb_serial_port *port, |
| 261 | const unsigned char *buf, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | { |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 263 | struct urb *urb = NULL; |
| 264 | unsigned long flags; |
| 265 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 267 | if (port->bulk_out_size == 0) |
| 268 | return -EINVAL; |
Johan Hovold | f4a4cbb | 2010-05-13 21:02:03 +0200 | [diff] [blame] | 269 | |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 270 | if (count == 0) |
| 271 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 273 | count = min(count, port->bulk_out_size - 1); |
| 274 | |
| 275 | spin_lock_irqsave(&port->lock, flags); |
| 276 | if (__test_and_clear_bit(0, &port->write_urbs_free)) { |
| 277 | urb = port->write_urbs[0]; |
| 278 | port->tx_bytes += count; |
| 279 | } |
| 280 | spin_unlock_irqrestore(&port->lock, flags); |
| 281 | |
| 282 | if (!urb) |
| 283 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
| 285 | /* |
| 286 | * The first byte of the packet we send to the device contains an |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 287 | * outbound header which indicates an additional number of BOFs and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | * a baud rate change. |
| 289 | * |
| 290 | * See section 5.4.2.2 of the USB IrDA spec. |
| 291 | */ |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 292 | *(u8 *)urb->transfer_buffer = ir_xbof | ir_baud; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Johan Hovold | dd05b1a | 2020-01-22 11:15:28 +0100 | [diff] [blame] | 294 | memcpy(urb->transfer_buffer + 1, buf, count); |
| 295 | |
| 296 | urb->transfer_buffer_length = count + 1; |
| 297 | urb->transfer_flags = URB_ZERO_PACKET; |
| 298 | |
| 299 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
| 300 | if (ret) { |
| 301 | dev_err(&port->dev, "failed to submit write urb: %d\n", ret); |
| 302 | |
| 303 | spin_lock_irqsave(&port->lock, flags); |
| 304 | __set_bit(0, &port->write_urbs_free); |
| 305 | port->tx_bytes -= count; |
| 306 | spin_unlock_irqrestore(&port->lock, flags); |
| 307 | |
| 308 | return ret; |
| 309 | } |
| 310 | |
| 311 | return count; |
| 312 | } |
| 313 | |
| 314 | static void ir_write_bulk_callback(struct urb *urb) |
| 315 | { |
| 316 | struct usb_serial_port *port = urb->context; |
| 317 | int status = urb->status; |
| 318 | unsigned long flags; |
| 319 | |
| 320 | spin_lock_irqsave(&port->lock, flags); |
| 321 | __set_bit(0, &port->write_urbs_free); |
| 322 | port->tx_bytes -= urb->transfer_buffer_length - 1; |
| 323 | spin_unlock_irqrestore(&port->lock, flags); |
| 324 | |
| 325 | switch (status) { |
| 326 | case 0: |
| 327 | break; |
| 328 | case -ENOENT: |
| 329 | case -ECONNRESET: |
| 330 | case -ESHUTDOWN: |
| 331 | dev_dbg(&port->dev, "write urb stopped: %d\n", status); |
| 332 | return; |
| 333 | case -EPIPE: |
| 334 | dev_err(&port->dev, "write urb stopped: %d\n", status); |
| 335 | return; |
| 336 | default: |
| 337 | dev_err(&port->dev, "nonzero write-urb status: %d\n", status); |
| 338 | break; |
| 339 | } |
| 340 | |
| 341 | usb_serial_port_softint(port); |
| 342 | } |
| 343 | |
| 344 | static int ir_write_room(struct tty_struct *tty) |
| 345 | { |
| 346 | struct usb_serial_port *port = tty->driver_data; |
| 347 | int count = 0; |
| 348 | |
| 349 | if (port->bulk_out_size == 0) |
| 350 | return 0; |
| 351 | |
| 352 | if (test_bit(0, &port->write_urbs_free)) |
| 353 | count = port->bulk_out_size - 1; |
| 354 | |
| 355 | return count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | } |
| 357 | |
Johan Hovold | f4a4cbb | 2010-05-13 21:02:03 +0200 | [diff] [blame] | 358 | static void ir_process_read_urb(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 360 | struct usb_serial_port *port = urb->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | unsigned char *data = urb->transfer_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Johan Hovold | f4a4cbb | 2010-05-13 21:02:03 +0200 | [diff] [blame] | 363 | if (!urb->actual_length) |
| 364 | return; |
| 365 | /* |
| 366 | * The first byte of the packet we get from the device |
| 367 | * contains a busy indicator and baud rate change. |
| 368 | * See section 5.4.1.2 of the USB IrDA spec. |
| 369 | */ |
| 370 | if (*data & 0x0f) |
| 371 | ir_baud = *data & 0x0f; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
Johan Hovold | f4a4cbb | 2010-05-13 21:02:03 +0200 | [diff] [blame] | 373 | if (urb->actual_length == 1) |
| 374 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Jiri Slaby | 05c7cd3 | 2013-01-03 15:53:04 +0100 | [diff] [blame] | 376 | tty_insert_flip_string(&port->port, data + 1, urb->actual_length - 1); |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 377 | tty_flip_buffer_push(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
| 379 | |
Johan Hovold | df66e8a | 2010-05-13 21:02:02 +0200 | [diff] [blame] | 380 | static void ir_set_termios_callback(struct urb *urb) |
| 381 | { |
Johan Hovold | df66e8a | 2010-05-13 21:02:02 +0200 | [diff] [blame] | 382 | kfree(urb->transfer_buffer); |
| 383 | |
Greg Kroah-Hartman | b978355 | 2012-05-03 16:44:20 -0700 | [diff] [blame] | 384 | if (urb->status) |
Greg Kroah-Hartman | 9f857ae | 2012-05-15 16:27:23 -0700 | [diff] [blame] | 385 | dev_dbg(&urb->dev->dev, "%s - non-zero urb status: %d\n", |
| 386 | __func__, urb->status); |
Johan Hovold | df66e8a | 2010-05-13 21:02:02 +0200 | [diff] [blame] | 387 | } |
| 388 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 389 | static void ir_set_termios(struct tty_struct *tty, |
| 390 | struct usb_serial_port *port, struct ktermios *old_termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | { |
Johan Hovold | df66e8a | 2010-05-13 21:02:02 +0200 | [diff] [blame] | 392 | struct urb *urb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | unsigned char *transfer_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | int result; |
Alan Cox | a6ea438 | 2007-06-22 14:44:54 +0100 | [diff] [blame] | 395 | speed_t baud; |
| 396 | int ir_baud; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 398 | baud = tty_get_baud_rate(tty); |
Alan Cox | a6ea438 | 2007-06-22 14:44:54 +0100 | [diff] [blame] | 399 | |
| 400 | /* |
| 401 | * FIXME, we should compare the baud request against the |
| 402 | * capability stated in the IR header that we got in the |
| 403 | * startup function. |
| 404 | */ |
| 405 | |
| 406 | switch (baud) { |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 407 | case 2400: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 408 | ir_baud = USB_IRDA_LS_2400; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 409 | break; |
| 410 | case 9600: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 411 | ir_baud = USB_IRDA_LS_9600; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 412 | break; |
| 413 | case 19200: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 414 | ir_baud = USB_IRDA_LS_19200; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 415 | break; |
| 416 | case 38400: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 417 | ir_baud = USB_IRDA_LS_38400; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 418 | break; |
| 419 | case 57600: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 420 | ir_baud = USB_IRDA_LS_57600; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 421 | break; |
| 422 | case 115200: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 423 | ir_baud = USB_IRDA_LS_115200; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 424 | break; |
| 425 | case 576000: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 426 | ir_baud = USB_IRDA_LS_576000; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 427 | break; |
| 428 | case 1152000: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 429 | ir_baud = USB_IRDA_LS_1152000; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 430 | break; |
| 431 | case 4000000: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 432 | ir_baud = USB_IRDA_LS_4000000; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 433 | break; |
| 434 | default: |
Johan Hovold | 10d24ac | 2020-01-22 11:15:27 +0100 | [diff] [blame] | 435 | ir_baud = USB_IRDA_LS_9600; |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 436 | baud = 9600; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
Alan Cox | a6ea438 | 2007-06-22 14:44:54 +0100 | [diff] [blame] | 439 | if (xbof == -1) |
| 440 | ir_xbof = ir_xbof_change(ir_add_bof); |
| 441 | else |
| 442 | ir_xbof = ir_xbof_change(xbof) ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
Alan Cox | 560aac2 | 2007-10-18 01:24:20 -0700 | [diff] [blame] | 444 | /* Only speed changes are supported */ |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 445 | tty_termios_copy_hw(&tty->termios, old_termios); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 446 | tty_encode_baud_rate(tty, baud, baud); |
Johan Hovold | df66e8a | 2010-05-13 21:02:02 +0200 | [diff] [blame] | 447 | |
| 448 | /* |
| 449 | * send the baud change out on an "empty" data packet |
| 450 | */ |
| 451 | urb = usb_alloc_urb(0, GFP_KERNEL); |
Johan Hovold | 10c642d | 2013-12-29 19:22:56 +0100 | [diff] [blame] | 452 | if (!urb) |
Johan Hovold | df66e8a | 2010-05-13 21:02:02 +0200 | [diff] [blame] | 453 | return; |
Johan Hovold | 10c642d | 2013-12-29 19:22:56 +0100 | [diff] [blame] | 454 | |
Johan Hovold | df66e8a | 2010-05-13 21:02:02 +0200 | [diff] [blame] | 455 | transfer_buffer = kmalloc(1, GFP_KERNEL); |
Johan Hovold | 10c642d | 2013-12-29 19:22:56 +0100 | [diff] [blame] | 456 | if (!transfer_buffer) |
Johan Hovold | df66e8a | 2010-05-13 21:02:02 +0200 | [diff] [blame] | 457 | goto err_buf; |
Johan Hovold | df66e8a | 2010-05-13 21:02:02 +0200 | [diff] [blame] | 458 | |
| 459 | *transfer_buffer = ir_xbof | ir_baud; |
| 460 | |
| 461 | usb_fill_bulk_urb( |
| 462 | urb, |
| 463 | port->serial->dev, |
| 464 | usb_sndbulkpipe(port->serial->dev, |
| 465 | port->bulk_out_endpointAddress), |
| 466 | transfer_buffer, |
| 467 | 1, |
| 468 | ir_set_termios_callback, |
| 469 | port); |
| 470 | |
| 471 | urb->transfer_flags = URB_ZERO_PACKET; |
| 472 | |
| 473 | result = usb_submit_urb(urb, GFP_KERNEL); |
| 474 | if (result) { |
| 475 | dev_err(&port->dev, "%s - failed to submit urb: %d\n", |
| 476 | __func__, result); |
| 477 | goto err_subm; |
| 478 | } |
| 479 | |
| 480 | usb_free_urb(urb); |
| 481 | |
| 482 | return; |
| 483 | err_subm: |
| 484 | kfree(transfer_buffer); |
| 485 | err_buf: |
| 486 | usb_free_urb(urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | } |
| 488 | |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 489 | static int __init ir_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | { |
Johan Hovold | 6f6ed69 | 2010-05-13 21:02:01 +0200 | [diff] [blame] | 491 | if (buffer_size) { |
| 492 | ir_device.bulk_in_size = buffer_size; |
| 493 | ir_device.bulk_out_size = buffer_size; |
| 494 | } |
| 495 | |
Greg Kroah-Hartman | 7663e30 | 2012-09-18 17:00:48 +0100 | [diff] [blame] | 496 | return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ir_id_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | |
Felipe Balbi | e0d795e | 2008-06-03 14:47:52 +0300 | [diff] [blame] | 499 | static void __exit ir_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | { |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 501 | usb_serial_deregister_drivers(serial_drivers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | |
| 505 | module_init(ir_init); |
| 506 | module_exit(ir_exit); |
| 507 | |
| 508 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 509 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 510 | MODULE_LICENSE("GPL"); |
| 511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | module_param(xbof, int, 0); |
| 513 | MODULE_PARM_DESC(xbof, "Force specific number of XBOFs"); |
| 514 | module_param(buffer_size, int, 0); |
| 515 | MODULE_PARM_DESC(buffer_size, "Size of the transfer buffers"); |
| 516 | |