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1da177e4 LT |
1 | /* |
2 | * IPWireless 3G UMTS TDD Modem driver (USB connected) | |
3 | * | |
4 | * Copyright (C) 2004 Roelf Diedericks <roelfd@inet.co.za> | |
5 | * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * All information about the device was acquired using SnoopyPro | |
6d1d1698 | 13 | * on MSFT's O/S, and examing the MSFT drivers' debug output |
1da177e4 LT |
14 | * (insanely left _on_ in the enduser version) |
15 | * | |
16 | * It was written out of frustration with the IPWireless USB modem | |
17 | * supplied by Axity3G/Sentech South Africa not supporting | |
18 | * Linux whatsoever. | |
19 | * | |
6d1d1698 | 20 | * Nobody provided any proprietary information that was not already |
1da177e4 | 21 | * available for this device. |
6d1d1698 AC |
22 | * |
23 | * The modem adheres to the "3GPP TS 27.007 AT command set for 3G | |
24 | * User Equipment (UE)" standard, available from | |
1da177e4 LT |
25 | * http://www.3gpp.org/ftp/Specs/html-info/27007.htm |
26 | * | |
27 | * The code was only tested the IPWireless handheld modem distributed | |
28 | * in South Africa by Sentech. | |
6d1d1698 | 29 | * |
1da177e4 LT |
30 | * It may work for Woosh Inc in .nz too, as it appears they use the |
31 | * same kit. | |
32 | * | |
6d1d1698 | 33 | * There is still some work to be done in terms of handling |
1da177e4 LT |
34 | * DCD, DTR, RTS, CTS which are currently faked. |
35 | * It's good enough for PPP at this point. It's based off all kinds of | |
36 | * code found in usb/serial and usb/class | |
1da177e4 LT |
37 | */ |
38 | ||
39 | #include <linux/kernel.h> | |
40 | #include <linux/errno.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/tty.h> | |
44 | #include <linux/tty_flip.h> | |
45 | #include <linux/module.h> | |
46 | #include <linux/spinlock.h> | |
47 | #include <linux/usb.h> | |
a969888c | 48 | #include <linux/usb/serial.h> |
6d1d1698 | 49 | #include <linux/uaccess.h> |
53e77df2 | 50 | #include "usb-wwan.h" |
1da177e4 LT |
51 | |
52 | /* | |
53 | * Version Information | |
54 | */ | |
b2c57379 | 55 | #define DRIVER_VERSION "v0.4" |
1da177e4 LT |
56 | #define DRIVER_AUTHOR "Roelf Diedericks" |
57 | #define DRIVER_DESC "IPWireless tty driver" | |
58 | ||
59 | #define IPW_TTY_MAJOR 240 /* real device node major id, experimental range */ | |
60 | #define IPW_TTY_MINORS 256 /* we support 256 devices, dunno why, it'd be insane :) */ | |
61 | ||
62 | #define USB_IPW_MAGIC 0x6d02 /* magic number for ipw struct */ | |
63 | ||
64 | ||
65 | /* Message sizes */ | |
66 | #define EVENT_BUFFER_SIZE 0xFF | |
6d1d1698 | 67 | #define CHAR2INT16(c1, c0) (((u32)((c1) & 0xff) << 8) + (u32)((c0) & 0xff)) |
1da177e4 LT |
68 | |
69 | /* vendor/product pairs that are known work with this driver*/ | |
70 | #define IPW_VID 0x0bc3 | |
71 | #define IPW_PID 0x0001 | |
72 | ||
73 | ||
74 | /* Vendor commands: */ | |
75 | ||
76 | /* baud rates */ | |
77 | enum { | |
78 | ipw_sio_b256000 = 0x000e, | |
79 | ipw_sio_b128000 = 0x001d, | |
80 | ipw_sio_b115200 = 0x0020, | |
81 | ipw_sio_b57600 = 0x0040, | |
82 | ipw_sio_b56000 = 0x0042, | |
83 | ipw_sio_b38400 = 0x0060, | |
84 | ipw_sio_b19200 = 0x00c0, | |
85 | ipw_sio_b14400 = 0x0100, | |
86 | ipw_sio_b9600 = 0x0180, | |
87 | ipw_sio_b4800 = 0x0300, | |
88 | ipw_sio_b2400 = 0x0600, | |
89 | ipw_sio_b1200 = 0x0c00, | |
90 | ipw_sio_b600 = 0x1800 | |
91 | }; | |
92 | ||
93 | /* data bits */ | |
94 | #define ipw_dtb_7 0x700 | |
6d1d1698 AC |
95 | #define ipw_dtb_8 0x810 /* ok so the define is misleading, I know, but forces 8,n,1 */ |
96 | /* I mean, is there a point to any other setting these days? :) */ | |
1da177e4 LT |
97 | |
98 | /* usb control request types : */ | |
6d1d1698 AC |
99 | #define IPW_SIO_RXCTL 0x00 /* control bulk rx channel transmissions, value=1/0 (on/off) */ |
100 | #define IPW_SIO_SET_BAUD 0x01 /* set baud, value=requested ipw_sio_bxxxx */ | |
101 | #define IPW_SIO_SET_LINE 0x03 /* set databits, parity. value=ipw_dtb_x */ | |
102 | #define IPW_SIO_SET_PIN 0x03 /* set/clear dtr/rts value=ipw_pin_xxx */ | |
103 | #define IPW_SIO_POLL 0x08 /* get serial port status byte, call with value=0 */ | |
104 | #define IPW_SIO_INIT 0x11 /* initializes ? value=0 (appears as first thing todo on open) */ | |
105 | #define IPW_SIO_PURGE 0x12 /* purge all transmissions?, call with value=numchar_to_purge */ | |
106 | #define IPW_SIO_HANDFLOW 0x13 /* set xon/xoff limits value=0, and a buffer of 0x10 bytes */ | |
107 | #define IPW_SIO_SETCHARS 0x13 /* set the flowcontrol special chars, value=0, buf=6 bytes, */ | |
108 | /* last 2 bytes contain flowcontrol chars e.g. 00 00 00 00 11 13 */ | |
1da177e4 LT |
109 | |
110 | /* values used for request IPW_SIO_SET_PIN */ | |
111 | #define IPW_PIN_SETDTR 0x101 | |
112 | #define IPW_PIN_SETRTS 0x202 | |
113 | #define IPW_PIN_CLRDTR 0x100 | |
6d1d1698 | 114 | #define IPW_PIN_CLRRTS 0x200 /* unconfirmed */ |
1da177e4 LT |
115 | |
116 | /* values used for request IPW_SIO_RXCTL */ | |
117 | #define IPW_RXBULK_ON 1 | |
118 | #define IPW_RXBULK_OFF 0 | |
119 | ||
120 | /* various 16 byte hardcoded transferbuffers used by flow control */ | |
6d1d1698 AC |
121 | #define IPW_BYTES_FLOWINIT { 0x01, 0, 0, 0, 0x40, 0, 0, 0, \ |
122 | 0, 0, 0, 0, 0, 0, 0, 0 } | |
1da177e4 LT |
123 | |
124 | /* Interpretation of modem status lines */ | |
125 | /* These need sorting out by individually connecting pins and checking | |
126 | * results. FIXME! | |
127 | * When data is being sent we see 0x30 in the lower byte; this must | |
128 | * contain DSR and CTS ... | |
129 | */ | |
130 | #define IPW_DSR ((1<<4) | (1<<5)) | |
131 | #define IPW_CTS ((1<<5) | (1<<4)) | |
132 | ||
133 | #define IPW_WANTS_TO_SEND 0x30 | |
1da177e4 | 134 | |
68e24113 | 135 | static const struct usb_device_id id_table[] = { |
1da177e4 LT |
136 | { USB_DEVICE(IPW_VID, IPW_PID) }, |
137 | { }, | |
138 | }; | |
68e24113 | 139 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 140 | |
90ab5ee9 | 141 | static bool debug; |
1da177e4 | 142 | |
a509a7e4 | 143 | static int ipw_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
144 | { |
145 | struct usb_device *dev = port->serial->dev; | |
146 | u8 buf_flow_static[16] = IPW_BYTES_FLOWINIT; | |
147 | u8 *buf_flow_init; | |
148 | int result; | |
149 | ||
5d7efe5b | 150 | buf_flow_init = kmemdup(buf_flow_static, 16, GFP_KERNEL); |
1da177e4 LT |
151 | if (!buf_flow_init) |
152 | return -ENOMEM; | |
1da177e4 | 153 | |
6d1d1698 AC |
154 | /* --1: Tell the modem to initialize (we think) From sniffs this is |
155 | * always the first thing that gets sent to the modem during | |
156 | * opening of the device */ | |
157 | dbg("%s: Sending SIO_INIT (we guess)", __func__); | |
158 | result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
159 | IPW_SIO_INIT, | |
160 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
161 | 0, | |
162 | 0, /* index */ | |
163 | NULL, | |
164 | 0, | |
165 | 100000); | |
1da177e4 | 166 | if (result < 0) |
6d1d1698 AC |
167 | dev_err(&port->dev, |
168 | "Init of modem failed (error = %d)\n", result); | |
1da177e4 LT |
169 | |
170 | /* reset the bulk pipes */ | |
6d1d1698 AC |
171 | usb_clear_halt(dev, |
172 | usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress)); | |
173 | usb_clear_halt(dev, | |
174 | usb_sndbulkpipe(dev, port->bulk_out_endpointAddress)); | |
1da177e4 | 175 | |
6d1d1698 AC |
176 | /*--2: Start reading from the device */ |
177 | dbg("%s: setting up bulk read callback", __func__); | |
53e77df2 | 178 | usb_wwan_open(tty, port); |
1da177e4 LT |
179 | |
180 | /*--3: Tell the modem to open the floodgates on the rx bulk channel */ | |
6d1d1698 | 181 | dbg("%s:asking modem for RxRead (RXBULK_ON)", __func__); |
1da177e4 | 182 | result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
6d1d1698 AC |
183 | IPW_SIO_RXCTL, |
184 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
185 | IPW_RXBULK_ON, | |
186 | 0, /* index */ | |
187 | NULL, | |
188 | 0, | |
189 | 100000); | |
190 | if (result < 0) | |
191 | dev_err(&port->dev, | |
192 | "Enabling bulk RxRead failed (error = %d)\n", result); | |
1da177e4 LT |
193 | |
194 | /*--4: setup the initial flowcontrol */ | |
6d1d1698 | 195 | dbg("%s:setting init flowcontrol (%s)", __func__, buf_flow_init); |
1da177e4 | 196 | result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
6d1d1698 AC |
197 | IPW_SIO_HANDFLOW, |
198 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
199 | 0, | |
200 | 0, | |
201 | buf_flow_init, | |
202 | 0x10, | |
203 | 200000); | |
1da177e4 | 204 | if (result < 0) |
6d1d1698 AC |
205 | dev_err(&port->dev, |
206 | "initial flowcontrol failed (error = %d)\n", result); | |
1da177e4 | 207 | |
1da177e4 LT |
208 | kfree(buf_flow_init); |
209 | return 0; | |
210 | } | |
211 | ||
53e77df2 ON |
212 | /* fake probe - only to allocate data structures */ |
213 | static int ipw_probe(struct usb_serial *serial, const struct usb_device_id *id) | |
214 | { | |
215 | struct usb_wwan_intf_private *data; | |
216 | ||
217 | data = kzalloc(sizeof(struct usb_wwan_intf_private), GFP_KERNEL); | |
218 | if (!data) | |
219 | return -ENOMEM; | |
220 | ||
221 | spin_lock_init(&data->susp_lock); | |
222 | usb_set_serial_data(serial, data); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | static void ipw_release(struct usb_serial *serial) | |
227 | { | |
228 | struct usb_wwan_intf_private *data = usb_get_serial_data(serial); | |
229 | ||
53e77df2 ON |
230 | usb_set_serial_data(serial, NULL); |
231 | kfree(data); | |
232 | } | |
233 | ||
335f8514 | 234 | static void ipw_dtr_rts(struct usb_serial_port *port, int on) |
1da177e4 LT |
235 | { |
236 | struct usb_device *dev = port->serial->dev; | |
237 | int result; | |
238 | ||
605204bf JH |
239 | dbg("%s: on = %d", __func__, on); |
240 | ||
1da177e4 | 241 | result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
6d1d1698 AC |
242 | IPW_SIO_SET_PIN, |
243 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
335f8514 | 244 | on ? IPW_PIN_SETDTR : IPW_PIN_CLRDTR, |
6d1d1698 AC |
245 | 0, |
246 | NULL, | |
247 | 0, | |
248 | 200000); | |
1da177e4 | 249 | if (result < 0) |
605204bf | 250 | dev_err(&port->dev, "setting dtr failed (error = %d)\n", |
6d1d1698 | 251 | result); |
1da177e4 | 252 | |
1da177e4 | 253 | result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
6d1d1698 | 254 | IPW_SIO_SET_PIN, USB_TYPE_VENDOR | |
605204bf | 255 | USB_RECIP_INTERFACE | USB_DIR_OUT, |
335f8514 | 256 | on ? IPW_PIN_SETRTS : IPW_PIN_CLRRTS, |
6d1d1698 AC |
257 | 0, |
258 | NULL, | |
259 | 0, | |
260 | 200000); | |
1da177e4 | 261 | if (result < 0) |
605204bf JH |
262 | dev_err(&port->dev, "setting rts failed (error = %d)\n", |
263 | result); | |
335f8514 | 264 | } |
1da177e4 | 265 | |
335f8514 AC |
266 | static void ipw_close(struct usb_serial_port *port) |
267 | { | |
268 | struct usb_device *dev = port->serial->dev; | |
269 | int result; | |
1da177e4 LT |
270 | |
271 | /*--3: purge */ | |
6d1d1698 | 272 | dbg("%s:sending purge", __func__); |
1da177e4 | 273 | result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
6d1d1698 AC |
274 | IPW_SIO_PURGE, USB_TYPE_VENDOR | |
275 | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
276 | 0x03, | |
277 | 0, | |
278 | NULL, | |
279 | 0, | |
280 | 200000); | |
1da177e4 | 281 | if (result < 0) |
898eb71c | 282 | dev_err(&port->dev, "purge failed (error = %d)\n", result); |
1da177e4 LT |
283 | |
284 | ||
6d1d1698 AC |
285 | /* send RXBULK_off (tell modem to stop transmitting bulk data on |
286 | rx chan) */ | |
1da177e4 | 287 | result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
6d1d1698 AC |
288 | IPW_SIO_RXCTL, |
289 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
290 | IPW_RXBULK_OFF, | |
291 | 0, /* index */ | |
292 | NULL, | |
293 | 0, | |
294 | 100000); | |
1da177e4 LT |
295 | |
296 | if (result < 0) | |
6d1d1698 AC |
297 | dev_err(&port->dev, |
298 | "Disabling bulk RxRead failed (error = %d)\n", result); | |
1da177e4 | 299 | |
53e77df2 | 300 | usb_wwan_close(port); |
6d1d1698 | 301 | } |
1da177e4 | 302 | |
ea65370d | 303 | static struct usb_serial_driver ipw_device = { |
18fcac35 GKH |
304 | .driver = { |
305 | .owner = THIS_MODULE, | |
269bda1c | 306 | .name = "ipw", |
18fcac35 | 307 | }, |
269bda1c | 308 | .description = "IPWireless converter", |
68e24113 | 309 | .id_table = id_table, |
1da177e4 LT |
310 | .num_ports = 1, |
311 | .open = ipw_open, | |
312 | .close = ipw_close, | |
53e77df2 ON |
313 | .probe = ipw_probe, |
314 | .attach = usb_wwan_startup, | |
315 | .release = ipw_release, | |
a1028f0a | 316 | .port_remove = usb_wwan_port_remove, |
335f8514 | 317 | .dtr_rts = ipw_dtr_rts, |
53e77df2 | 318 | .write = usb_wwan_write, |
1da177e4 LT |
319 | }; |
320 | ||
7dbe2460 AS |
321 | static struct usb_serial_driver * const serial_drivers[] = { |
322 | &ipw_device, NULL | |
323 | }; | |
1da177e4 | 324 | |
68e24113 | 325 | module_usb_serial_driver(serial_drivers, id_table); |
1da177e4 LT |
326 | |
327 | /* Module information */ | |
6d1d1698 AC |
328 | MODULE_AUTHOR(DRIVER_AUTHOR); |
329 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
330 | MODULE_LICENSE("GPL"); |
331 | ||
332 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
333 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |