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USB: remove incorrect struct class_device from the printer gadget
[net-next-2.6.git] / drivers / usb / serial / ftdi_sio.c
CommitLineData
1da177e4
LT		 1/*
2 * USB FTDI SIO driver
3 *
5c09d144
DB		 4 * Copyright (C) 1999 - 2001
5 * Greg Kroah-Hartman (greg@kroah.com)
1da177e4
LT		 6 * Bill Ryder (bryder@sgi.com)
7 * Copyright (C) 2002
8 * Kuba Ober (kuba@mareimbrium.org)
9 *
5c09d144
DB		 10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
1da177e4
LT		 14 *
15 * See Documentation/usb/usb-serial.txt for more information on using this driver
16 *
17 * See http://ftdi-usb-sio.sourceforge.net for upto date testing info
18 * and extra documentation
19 *
504b55cc
GKH		 20 * Change entries from 2004 and earlier can be found in versions of this
21 * file in kernel versions prior to the 2.6.24 release.
1da177e4
LT		 22 *
23 */
24
25/* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */
26/* Thanx to FTDI for so kindly providing details of the protocol required */
27/* to talk to the device */
28/* Thanx to gkh and the rest of the usb dev group for all code I have assimilated :-) */
29
1da177e4
LT		 30#include <linux/kernel.h>
31#include <linux/errno.h>
32#include <linux/init.h>
33#include <linux/slab.h>
34#include <linux/tty.h>
35#include <linux/tty_driver.h>
36#include <linux/tty_flip.h>
37#include <linux/module.h>
38#include <linux/spinlock.h>
39#include <asm/uaccess.h>
40#include <linux/usb.h>
41#include <linux/serial.h>
a969888c 42#include <linux/usb/serial.h>
1da177e4
LT		 43#include "ftdi_sio.h"
44
45/*
46 * Version Information
47 */
8f977e42 48#define DRIVER_VERSION "v1.4.3"
1da177e4
LT		 49#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>"
50#define DRIVER_DESC "USB FTDI Serial Converters Driver"
51
52static int debug;
fdcb0a0f
IA		 53static __u16 vendor = FTDI_VID;
54static __u16 product;
1da177e4 55
0ffbbe25
ON		 56struct ftdi_private {
57 ftdi_chip_type_t chip_type;
58 /* type of the device, either SIO or FT8U232AM */
59 int baud_base; /* baud base clock for divisor setting */
60 int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */
61 __u16 last_set_data_urb_value ;
62 /* the last data state set - needed for doing a break */
63 int write_offset; /* This is the offset in the usb data block to write the serial data -
64 * it is different between devices
65 */
66 int flags; /* some ASYNC_xxxx flags are supported */
67 unsigned long last_dtr_rts; /* saved modem control outputs */
68 wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
69 char prev_status, diff_status; /* Used for TIOCMIWAIT */
70 __u8 rx_flags; /* receive state flags (throttling) */
71 spinlock_t rx_lock; /* spinlock for receive state */
72 struct delayed_work rx_work;
73 struct usb_serial_port *port;
74 int rx_processed;
75 unsigned long rx_bytes;
76
77 __u16 interface; /* FT2232C port interface (0 for FT232/245) */
78
669a6db1 79 speed_t force_baud; /* if non-zero, force the baud rate to this value */
0ffbbe25
ON		 80 int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */
81
82 spinlock_t tx_lock; /* spinlock for transmit state */
83 unsigned long tx_bytes;
84 unsigned long tx_outstanding_bytes;
85 unsigned long tx_outstanding_urbs;
86};
87
8f977e42
IA		 88/* struct ftdi_sio_quirk is used by devices requiring special attention. */
89struct ftdi_sio_quirk {
fa91d43b 90 int (*probe)(struct usb_serial *);
0ffbbe25 91 void (*port_probe)(struct ftdi_private *); /* Special settings for probed ports. */
8f977e42
IA		 92};
93
20734345 94static int ftdi_jtag_probe (struct usb_serial *serial);
546d7eec 95static int ftdi_mtxorb_hack_setup (struct usb_serial *serial);
0ffbbe25
ON		 96static void ftdi_USB_UIRT_setup (struct ftdi_private *priv);
97static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv);
8f977e42 98
20734345
HW		 99static struct ftdi_sio_quirk ftdi_jtag_quirk = {
100 .probe = ftdi_jtag_probe,
fa91d43b
TL		 101};
102
546d7eec
KV		 103static struct ftdi_sio_quirk ftdi_mtxorb_hack_quirk = {
104 .probe = ftdi_mtxorb_hack_setup,
105};
106
8f977e42 107static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
0ffbbe25 108 .port_probe = ftdi_USB_UIRT_setup,
8f977e42
IA		 109};
110
111static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = {
0ffbbe25 112 .port_probe = ftdi_HE_TIRA1_setup,
1da177e4
LT		 113};
114
115/*
116 * The 8U232AM has the same API as the sio except for:
117 * - it can support MUCH higher baudrates; up to:
118 * o 921600 for RS232 and 2000000 for RS422/485 at 48MHz
119 * o 230400 at 12MHz
120 * so .. 8U232AM's baudrate setting codes are different
121 * - it has a two byte status code.
122 * - it returns characters every 16ms (the FTDI does it every 40ms)
123 *
124 * the bcdDevice value is used to differentiate FT232BM and FT245BM from
125 * the earlier FT8U232AM and FT8U232BM. For now, include all known VID/PID
126 * combinations in both tables.
8f977e42
IA		 127 * FIXME: perhaps bcdDevice can also identify 12MHz FT8U232AM devices,
128 * but I don't know if those ever went into mass production. [Ian Abbott]
1da177e4
LT		 129 */
130
131
1da177e4
LT		 132
133static struct usb_device_id id_table_combined [] = {
2011e924
JD		 134 { USB_DEVICE(FTDI_VID, FTDI_AMC232_PID) },
135 { USB_DEVICE(FTDI_VID, FTDI_CANUSB_PID) },
72a9f958 136 { USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) },
1da177e4 137 { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) },
69737dfa 138 { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) },
d099321b 139 { USB_DEVICE(FTDI_VID, FTDI_IPLUS2_PID) },
fad14a0d 140 { USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) },
1da177e4
LT		 141 { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
142 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
143 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
d8b21606 144 { USB_DEVICE(FTDI_VID, FTDI_232RL_PID) },
1da177e4 145 { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
c0f8d561 146 { USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
1da177e4 147 { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
2adb80e9 148 { USB_DEVICE(FTDI_VID, FTDI_OPENDCC_PID) },
1da177e4
LT		 149 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
150 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
151 { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
152 { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
153 { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
154 { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
155 { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
156 { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
157 { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
158 { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
159 { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
160 { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
161 { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
8f977e42
IA		 162 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
163 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
164 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
165 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
166 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
167 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
168 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
546d7eec
KV		 169 { USB_DEVICE(MTXORB_VK_VID, MTXORB_VK_PID),
170 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
8f977e42 171 { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
1da177e4 172 { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
274a4bbc 173 { USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
868e440d 174 { USB_DEVICE(FTDI_VID, FTDI_USBX_707_PID) },
1da177e4
LT		 175 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
176 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
177 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
178 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
a1484827 179 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) },
1da177e4
LT		 180 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
181 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
182 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
183 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
184 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
185 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
186 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
187 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
188 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
189 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
190 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
191 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
192 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
193 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
194 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
195 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
196 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
197 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
198 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
199 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
200 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
201 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
202 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
203 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
204 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
205 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
206 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
207 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
208 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
209 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
210 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
211 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
212 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
213 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
214 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
215 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
216 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
217 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
218 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
219 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
220 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
221 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
222 { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
223 { USB_DEVICE(OCT_VID, OCT_US101_PID) },
8f977e42
IA		 224 { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
225 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
226 { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
227 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
1da177e4
LT		 228 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
229 { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
230 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
231 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
8f977e42
IA		 232 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
233 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
234 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
235 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
236 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
237 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
238 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
239 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
240 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
241 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
242 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
243 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
244 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
245 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
246 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
247 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
1da177e4 248 { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) },
47900743 249 { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
e6ac4a40
IA		 250 { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
251 { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
207c47e1 252 { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
bde62185 253 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
4eaf60e0
TS		 254 { USB_DEVICE(FTDI_VID, FTDI_IBS_US485_PID) },
255 { USB_DEVICE(FTDI_VID, FTDI_IBS_PICPRO_PID) },
256 { USB_DEVICE(FTDI_VID, FTDI_IBS_PCMCIA_PID) },
257 { USB_DEVICE(FTDI_VID, FTDI_IBS_PK1_PID) },
258 { USB_DEVICE(FTDI_VID, FTDI_IBS_RS232MON_PID) },
259 { USB_DEVICE(FTDI_VID, FTDI_IBS_APP70_PID) },
260 { USB_DEVICE(FTDI_VID, FTDI_IBS_PEDO_PID) },
261 { USB_DEVICE(FTDI_VID, FTDI_IBS_PROD_PID) },
e6ac4a40 262 /*
42f8aa94
PS		 263 * Due to many user requests for multiple ELV devices we enable
264 * them by default.
e6ac4a40 265 */
42f8aa94
PS		 266 { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) },
267 { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) },
268 { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) },
269 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) },
270 { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) },
271 { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) },
272 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) },
273 { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) },
274 { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) },
275 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) },
276 { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) },
277 { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) },
278 { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) },
279 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) },
280 { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) },
281 { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) },
282 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) },
283 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) },
284 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) },
5c09d144
DB		 285 { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
286 { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
287 { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
288 { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
289 { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
290 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
291 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
ec434e9b 292 { USB_DEVICE(FTDI_VID, FTDI_CCSMACHX_2_PID) },
1da177e4
LT		 293 { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
294 { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
295 { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
296 { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
e6ac4a40 297 { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
1da177e4 298 { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) },
ef31fec0 299 { USB_DEVICE(TTI_VID, TTI_QL355P_PID) },
6f92872c 300 { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
1da177e4
LT		 301 { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
302 { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
303 { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
304 { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
6f92872c
IA		 305 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
306 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
e6ac4a40
IA		 307 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
308 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
309 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
310 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
311 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
312 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
313 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
314 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
6f92872c 315 { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
8f977e42 316 { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
34d1a8aa
IA		 317 { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) },
318 { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) },
9b1513d9
IA		 319 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
320 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
34d1a8aa
IA		 321 { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) },
322 { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) },
323 { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) },
324 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) },
740a4282
IA		 325 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
326 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
9b1513d9 327 { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
c1f8ea7d
SH		 328 { USB_DEVICE(EVOLUTION_VID, EVO_HYBRID_PID) },
329 { USB_DEVICE(EVOLUTION_VID, EVO_RCM4_PID) },
c9c7746d
RS		 330 { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
331 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
09c280a2 332 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
c9c7746d 333 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
09c280a2 334 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
34910434 335 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16IC_PID) },
b4723ae3
IA		 336 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
337 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
effac8be 338 { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
641adaae 339 { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
7e1c0b86 340 { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) },
a94b52ac
IA		 341 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
342 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
ce40d290 343 { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
cdd3b156 344 { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
7e0258fd 345 { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
bf58fbd5 346 { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
62a13db3 347 { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
20a0f47e 348 { USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
eb79b4fd 349 { USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
48437486 350 { USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
e1979fef 351 { USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
eaede2cb 352 { USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
9978f9e1
IA		 353 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) },
354 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) },
355 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) },
40c36092 356 { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) },
822c7ef4 357 { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) },
762e92fa 358 { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) },
d7fde2d6 359 { USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) },
4bb0ef19 360 { USB_DEVICE(FTDI_VID, FTDI_ELSTER_UNICOM_PID) },
fa91d43b 361 { USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID),
20734345
HW		 362 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
363 { USB_DEVICE(FIC_VID, FIC_NEO1973_DEBUG_PID),
364 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
365 { USB_DEVICE(FTDI_VID, FTDI_OOCDLINK_PID),
366 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
fdcb0a0f
IA		 367 { }, /* Optional parameter entry */
368 { } /* Terminating entry */
1da177e4
LT		 369};
370
371MODULE_DEVICE_TABLE (usb, id_table_combined);
372
373static struct usb_driver ftdi_driver = {
374 .name = "ftdi_sio",
375 .probe = usb_serial_probe,
376 .disconnect = usb_serial_disconnect,
377 .id_table = id_table_combined,
5c09d144 378 .no_dynamic_id = 1,
1da177e4
LT		 379};
380
4c4c9432 381static const char *ftdi_chip_name[] = {
1da177e4
LT		 382 [SIO] = "SIO", /* the serial part of FT8U100AX */
383 [FT8U232AM] = "FT8U232AM",
384 [FT232BM] = "FT232BM",
385 [FT2232C] = "FT2232C",
d8b21606 386 [FT232RL] = "FT232RL",
1da177e4
LT		 387};
388
389
390/* Constants for read urb and write urb */
391#define BUFSZ 512
392#define PKTSZ 64
393
394/* rx_flags */
395#define THROTTLED 0x01
396#define ACTUALLY_THROTTLED 0x02
397
1da177e4
LT		 398/* Used for TIOCMIWAIT */
399#define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
400#define FTDI_STATUS_B1_MASK (FTDI_RS_BI)
401/* End TIOCMIWAIT */
402
bbc5d276
RK		 403#define FTDI_IMPL_ASYNC_FLAGS = (ASYNC_SPD_HI | ASYNC_SPD_VHI \
404 | ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP)
1da177e4
LT		 405
406/* function prototypes for a FTDI serial converter */
8f977e42 407static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id);
1da177e4 408static void ftdi_shutdown (struct usb_serial *serial);
12bdbe03
JR		 409static int ftdi_sio_port_probe (struct usb_serial_port *port);
410static int ftdi_sio_port_remove (struct usb_serial_port *port);
1da177e4
LT		 411static int ftdi_open (struct usb_serial_port *port, struct file *filp);
412static void ftdi_close (struct usb_serial_port *port, struct file *filp);
413static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count);
414static int ftdi_write_room (struct usb_serial_port *port);
415static int ftdi_chars_in_buffer (struct usb_serial_port *port);
7d12e780
DH		 416static void ftdi_write_bulk_callback (struct urb *urb);
417static void ftdi_read_bulk_callback (struct urb *urb);
c4028958 418static void ftdi_process_read (struct work_struct *work);
606d099c 419static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios * old);
1da177e4
LT		 420static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file);
421static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear);
422static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
423static void ftdi_break_ctl (struct usb_serial_port *port, int break_state );
424static void ftdi_throttle (struct usb_serial_port *port);
425static void ftdi_unthrottle (struct usb_serial_port *port);
426
427static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base);
428static unsigned short int ftdi_232am_baud_to_divisor (int baud);
429static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base);
430static __u32 ftdi_232bm_baud_to_divisor (int baud);
431
ea65370d 432static struct usb_serial_driver ftdi_sio_device = {
18fcac35
GKH		 433 .driver = {
434 .owner = THIS_MODULE,
269bda1c 435 .name = "ftdi_sio",
18fcac35 436 },
269bda1c 437 .description = "FTDI USB Serial Device",
d9b1b787 438 .usb_driver = &ftdi_driver ,
8f977e42 439 .id_table = id_table_combined,
1da177e4
LT		 440 .num_interrupt_in = 0,
441 .num_bulk_in = 1,
442 .num_bulk_out = 1,
443 .num_ports = 1,
8f977e42 444 .probe = ftdi_sio_probe,
12bdbe03
JR		 445 .port_probe = ftdi_sio_port_probe,
446 .port_remove = ftdi_sio_port_remove,
1da177e4
LT		 447 .open = ftdi_open,
448 .close = ftdi_close,
449 .throttle = ftdi_throttle,
450 .unthrottle = ftdi_unthrottle,
451 .write = ftdi_write,
452 .write_room = ftdi_write_room,
453 .chars_in_buffer = ftdi_chars_in_buffer,
454 .read_bulk_callback = ftdi_read_bulk_callback,
455 .write_bulk_callback = ftdi_write_bulk_callback,
456 .tiocmget = ftdi_tiocmget,
457 .tiocmset = ftdi_tiocmset,
458 .ioctl = ftdi_ioctl,
459 .set_termios = ftdi_set_termios,
460 .break_ctl = ftdi_break_ctl,
1da177e4
LT		 461 .shutdown = ftdi_shutdown,
462};
463
1da177e4
LT		 464
465#define WDR_TIMEOUT 5000 /* default urb timeout */
279e1545 466#define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
1da177e4
LT		 467
468/* High and low are for DTR, RTS etc etc */
469#define HIGH 1
470#define LOW 0
471
22465400
IA		 472/* number of outstanding urbs to prevent userspace DoS from happening */
473#define URB_UPPER_LIMIT 42
474
1da177e4
LT		 475/*
476 * ***************************************************************************
fa91d43b 477 * Utility functions
1da177e4
LT		 478 * ***************************************************************************
479 */
480
481static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
482{
483 unsigned short int divisor;
484 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
485 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1
486 divisor = divisor3 >> 3;
487 divisor3 &= 0x7;
488 if (divisor3 == 1) divisor |= 0xc000; else // 0.125
489 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5
490 if (divisor3 != 0) divisor |= 0x8000; // 0.25
491 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */
492 return divisor;
493}
494
495static unsigned short int ftdi_232am_baud_to_divisor(int baud)
496{
497 return(ftdi_232am_baud_base_to_divisor(baud, 48000000));
498}
499
500static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
501{
502 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
503 __u32 divisor;
504 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
505 divisor = divisor3 >> 3;
506 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
507 /* Deal with special cases for highest baud rates. */
508 if (divisor == 1) divisor = 0; else // 1.0
509 if (divisor == 0x4001) divisor = 1; // 1.5
510 return divisor;
511}
512
513static __u32 ftdi_232bm_baud_to_divisor(int baud)
514{
515 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000));
516}
517
74ede0ff
IA		 518#define set_mctrl(port, set) update_mctrl((port), (set), 0)
519#define clear_mctrl(port, clear) update_mctrl((port), 0, (clear))
520
521static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear)
1da177e4
LT		 522{
523 struct ftdi_private *priv = usb_get_serial_port_data(port);
524 char *buf;
74ede0ff 525 unsigned urb_value;
1da177e4 526 int rv;
1da177e4 527
74ede0ff
IA		 528 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
529 dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__);
530 return 0; /* no change */
531 }
1da177e4 532
1da177e4 533 buf = kmalloc(1, GFP_NOIO);
74ede0ff 534 if (!buf) {
1da177e4 535 return -ENOMEM;
1da177e4 536 }
74ede0ff
IA		 537
538 clear &= ~set; /* 'set' takes precedence over 'clear' */
539 urb_value = 0;
540 if (clear & TIOCM_DTR)
541 urb_value |= FTDI_SIO_SET_DTR_LOW;
542 if (clear & TIOCM_RTS)
543 urb_value |= FTDI_SIO_SET_RTS_LOW;
544 if (set & TIOCM_DTR)
545 urb_value |= FTDI_SIO_SET_DTR_HIGH;
546 if (set & TIOCM_RTS)
547 urb_value |= FTDI_SIO_SET_RTS_HIGH;
1da177e4
LT		 548 rv = usb_control_msg(port->serial->dev,
549 usb_sndctrlpipe(port->serial->dev, 0),
5c09d144 550 FTDI_SIO_SET_MODEM_CTRL_REQUEST,
1da177e4 551 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
74ede0ff 552 urb_value, priv->interface,
1da177e4
LT		 553 buf, 0, WDR_TIMEOUT);
554
555 kfree(buf);
74ede0ff
IA		 556 if (rv < 0) {
557 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
558 __FUNCTION__,
559 (set & TIOCM_DTR) ? "HIGH" :
560 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
561 (set & TIOCM_RTS) ? "HIGH" :
562 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
563 } else {
564 dbg("%s - DTR %s, RTS %s", __FUNCTION__,
565 (set & TIOCM_DTR) ? "HIGH" :
566 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
567 (set & TIOCM_RTS) ? "HIGH" :
568 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
569 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
570 }
1da177e4
LT		 571 return rv;
572}
573
574
575static __u32 get_ftdi_divisor(struct usb_serial_port * port);
576
577
578static int change_speed(struct usb_serial_port *port)
579{
580 struct ftdi_private *priv = usb_get_serial_port_data(port);
581 char *buf;
582 __u16 urb_value;
583 __u16 urb_index;
584 __u32 urb_index_value;
585 int rv;
586
587 buf = kmalloc(1, GFP_NOIO);
588 if (!buf)
589 return -ENOMEM;
590
591 urb_index_value = get_ftdi_divisor(port);
592 urb_value = (__u16)urb_index_value;
593 urb_index = (__u16)(urb_index_value >> 16);
594 if (priv->interface) { /* FT2232C */
595 urb_index = (__u16)((urb_index << 8) | priv->interface);
596 }
5c09d144 597
1da177e4
LT		 598 rv = usb_control_msg(port->serial->dev,
599 usb_sndctrlpipe(port->serial->dev, 0),
600 FTDI_SIO_SET_BAUDRATE_REQUEST,
601 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
602 urb_value, urb_index,
279e1545 603 buf, 0, WDR_SHORT_TIMEOUT);
1da177e4
LT		 604
605 kfree(buf);
606 return rv;
607}
608
609
610static __u32 get_ftdi_divisor(struct usb_serial_port * port)
611{ /* get_ftdi_divisor */
612 struct ftdi_private *priv = usb_get_serial_port_data(port);
613 __u32 div_value = 0;
614 int div_okay = 1;
615 int baud;
616
617 /*
618 * The logic involved in setting the baudrate can be cleanly split in 3 steps.
619 * Obtaining the actual baud rate is a little tricky since unix traditionally
620 * somehow ignored the possibility to set non-standard baud rates.
621 * 1. Standard baud rates are set in tty->termios->c_cflag
622 * 2. If these are not enough, you can set any speed using alt_speed as follows:
623 * - set tty->termios->c_cflag speed to B38400
624 * - set your real speed in tty->alt_speed; it gets ignored when
625 * alt_speed==0, (or)
626 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
627 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just
628 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800)
629 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate
630 * 3. You can also set baud rate by setting custom divisor as follows
631 * - set tty->termios->c_cflag speed to B38400
632 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
633 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
634 * o custom_divisor set to baud_base / your_new_baudrate
635 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really
636 * spend some time and separate+move this common code to serial.c, it is
637 * replicated in nearly every serial driver you see.
638 */
639
640 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */
641
642 baud = tty_get_baud_rate(port->tty);
643 dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud);
644
645 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */
646
647 if (baud == 38400 &&
648 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
649 (priv->custom_divisor)) {
650 baud = priv->baud_base / priv->custom_divisor;
651 dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud);
652 }
653
654 /* 3. Convert baudrate to device-specific divisor */
655
5c09d144 656 if (!baud) baud = 9600;
1da177e4
LT		 657 switch(priv->chip_type) {
658 case SIO: /* SIO chip */
659 switch(baud) {
660 case 300: div_value = ftdi_sio_b300; break;
661 case 600: div_value = ftdi_sio_b600; break;
662 case 1200: div_value = ftdi_sio_b1200; break;
663 case 2400: div_value = ftdi_sio_b2400; break;
664 case 4800: div_value = ftdi_sio_b4800; break;
665 case 9600: div_value = ftdi_sio_b9600; break;
666 case 19200: div_value = ftdi_sio_b19200; break;
667 case 38400: div_value = ftdi_sio_b38400; break;
668 case 57600: div_value = ftdi_sio_b57600; break;
669 case 115200: div_value = ftdi_sio_b115200; break;
670 } /* baud */
671 if (div_value == 0) {
5c09d144 672 dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud);
1da177e4 673 div_value = ftdi_sio_b9600;
bd5e47cc 674 baud = 9600;
1da177e4
LT		 675 div_okay = 0;
676 }
677 break;
678 case FT8U232AM: /* 8U232AM chip */
679 if (baud <= 3000000) {
680 div_value = ftdi_232am_baud_to_divisor(baud);
681 } else {
682 dbg("%s - Baud rate too high!", __FUNCTION__);
bd5e47cc 683 baud = 9600;
1da177e4
LT		 684 div_value = ftdi_232am_baud_to_divisor(9600);
685 div_okay = 0;
686 }
687 break;
688 case FT232BM: /* FT232BM chip */
689 case FT2232C: /* FT2232C chip */
3b009c63 690 case FT232RL:
1da177e4
LT		 691 if (baud <= 3000000) {
692 div_value = ftdi_232bm_baud_to_divisor(baud);
693 } else {
694 dbg("%s - Baud rate too high!", __FUNCTION__);
695 div_value = ftdi_232bm_baud_to_divisor(9600);
696 div_okay = 0;
669a6db1 697 baud = 9600;
1da177e4
LT		 698 }
699 break;
700 } /* priv->chip_type */
701
702 if (div_okay) {
703 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
704 __FUNCTION__, baud, (unsigned long)div_value,
705 ftdi_chip_name[priv->chip_type]);
706 }
707
669a6db1 708 tty_encode_baud_rate(port->tty, baud, baud);
1da177e4
LT		 709 return(div_value);
710}
711
712
713static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo)
714{
715 struct ftdi_private *priv = usb_get_serial_port_data(port);
716 struct serial_struct tmp;
717
718 if (!retinfo)
719 return -EFAULT;
720 memset(&tmp, 0, sizeof(tmp));
721 tmp.flags = priv->flags;
722 tmp.baud_base = priv->baud_base;
723 tmp.custom_divisor = priv->custom_divisor;
724 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
725 return -EFAULT;
726 return 0;
727} /* get_serial_info */
728
729
730static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo)
731{ /* set_serial_info */
732 struct ftdi_private *priv = usb_get_serial_port_data(port);
733 struct serial_struct new_serial;
734 struct ftdi_private old_priv;
735
736 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
737 return -EFAULT;
738 old_priv = * priv;
739
740 /* Do error checking and permission checking */
741
742 if (!capable(CAP_SYS_ADMIN)) {
743 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
744 (priv->flags & ~ASYNC_USR_MASK)))
745 return -EPERM;
746 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
747 (new_serial.flags & ASYNC_USR_MASK));
748 priv->custom_divisor = new_serial.custom_divisor;
749 goto check_and_exit;
750 }
751
752 if ((new_serial.baud_base != priv->baud_base) &&
753 (new_serial.baud_base < 9600))
754 return -EINVAL;
755
756 /* Make the changes - these are privileged changes! */
757
758 priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
5c09d144 759 (new_serial.flags & ASYNC_FLAGS));
1da177e4
LT		 760 priv->custom_divisor = new_serial.custom_divisor;
761
762 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
763
764check_and_exit:
765 if ((old_priv.flags & ASYNC_SPD_MASK) !=
766 (priv->flags & ASYNC_SPD_MASK)) {
767 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
768 port->tty->alt_speed = 57600;
769 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
770 port->tty->alt_speed = 115200;
771 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
772 port->tty->alt_speed = 230400;
773 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
774 port->tty->alt_speed = 460800;
775 else
776 port->tty->alt_speed = 0;
777 }
778 if (((old_priv.flags & ASYNC_SPD_MASK) !=
779 (priv->flags & ASYNC_SPD_MASK)) ||
780 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
781 (old_priv.custom_divisor != priv->custom_divisor))) {
782 change_speed(port);
783 }
5c09d144 784
1da177e4
LT		 785 return (0);
786
787} /* set_serial_info */
788
789
8f977e42
IA		 790/* Determine type of FTDI chip based on USB config and descriptor. */
791static void ftdi_determine_type(struct usb_serial_port *port)
792{
793 struct ftdi_private *priv = usb_get_serial_port_data(port);
794 struct usb_serial *serial = port->serial;
795 struct usb_device *udev = serial->dev;
796 unsigned version;
797 unsigned interfaces;
798
799 /* Assume it is not the original SIO device for now. */
f5e09b7c 800 priv->baud_base = 48000000 / 2;
8f977e42
IA		 801 priv->write_offset = 0;
802
803 version = le16_to_cpu(udev->descriptor.bcdDevice);
804 interfaces = udev->actconfig->desc.bNumInterfaces;
805 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__,
806 version, interfaces);
807 if (interfaces > 1) {
808 int inter;
809
810 /* Multiple interfaces. Assume FT2232C. */
811 priv->chip_type = FT2232C;
812 /* Determine interface code. */
813 inter = serial->interface->altsetting->desc.bInterfaceNumber;
814 if (inter == 0) {
815 priv->interface = PIT_SIOA;
816 } else {
817 priv->interface = PIT_SIOB;
818 }
819 /* BM-type devices have a bug where bcdDevice gets set
820 * to 0x200 when iSerialNumber is 0. */
821 if (version < 0x500) {
822 dbg("%s: something fishy - bcdDevice too low for multi-interface device",
823 __FUNCTION__);
824 }
825 } else if (version < 0x200) {
826 /* Old device. Assume its the original SIO. */
827 priv->chip_type = SIO;
828 priv->baud_base = 12000000 / 16;
829 priv->write_offset = 1;
830 } else if (version < 0x400) {
831 /* Assume its an FT8U232AM (or FT8U245AM) */
832 /* (It might be a BM because of the iSerialNumber bug,
833 * but it will still work as an AM device.) */
834 priv->chip_type = FT8U232AM;
3b009c63 835 } else if (version < 0x600) {
8f977e42
IA		 836 /* Assume its an FT232BM (or FT245BM) */
837 priv->chip_type = FT232BM;
3b009c63
DB		 838 } else {
839 /* Assume its an FT232R */
840 priv->chip_type = FT232RL;
8f977e42
IA		 841 }
842 info("Detected %s", ftdi_chip_name[priv->chip_type]);
843}
844
845
1da177e4
LT		 846/*
847 * ***************************************************************************
848 * Sysfs Attribute
849 * ***************************************************************************
850 */
851
060b8845 852static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 853{
854 struct usb_serial_port *port = to_usb_serial_port(dev);
855 struct ftdi_private *priv = usb_get_serial_port_data(port);
12bdbe03 856 struct usb_device *udev = port->serial->dev;
1da177e4
LT		 857 unsigned short latency = 0;
858 int rv = 0;
5c09d144 859
5c09d144 860
1da177e4 861 dbg("%s",__FUNCTION__);
5c09d144 862
1da177e4
LT		 863 rv = usb_control_msg(udev,
864 usb_rcvctrlpipe(udev, 0),
865 FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
866 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
5c09d144 867 0, priv->interface,
1da177e4 868 (char*) &latency, 1, WDR_TIMEOUT);
5c09d144 869
1da177e4 870 if (rv < 0) {
898eb71c 871 dev_err(dev, "Unable to read latency timer: %i\n", rv);
1da177e4
LT		 872 return -EIO;
873 }
874 return sprintf(buf, "%i\n", latency);
875}
876
877/* Write a new value of the latency timer, in units of milliseconds. */
060b8845 878static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf,
1da177e4
LT		 879 size_t count)
880{
881 struct usb_serial_port *port = to_usb_serial_port(dev);
882 struct ftdi_private *priv = usb_get_serial_port_data(port);
12bdbe03 883 struct usb_device *udev = port->serial->dev;
1da177e4
LT		 884 char buf[1];
885 int v = simple_strtoul(valbuf, NULL, 10);
886 int rv = 0;
5c09d144 887
1da177e4 888 dbg("%s: setting latency timer = %i", __FUNCTION__, v);
5c09d144 889
1da177e4
LT		 890 rv = usb_control_msg(udev,
891 usb_sndctrlpipe(udev, 0),
892 FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
893 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
5c09d144 894 v, priv->interface,
1da177e4 895 buf, 0, WDR_TIMEOUT);
5c09d144 896
1da177e4 897 if (rv < 0) {
898eb71c 898 dev_err(dev, "Unable to write latency timer: %i\n", rv);
1da177e4
LT		 899 return -EIO;
900 }
5c09d144 901
1da177e4
LT		 902 return count;
903}
904
905/* Write an event character directly to the FTDI register. The ASCII
906 value is in the low 8 bits, with the enable bit in the 9th bit. */
060b8845 907static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf,
1da177e4
LT		 908 size_t count)
909{
910 struct usb_serial_port *port = to_usb_serial_port(dev);
911 struct ftdi_private *priv = usb_get_serial_port_data(port);
12bdbe03 912 struct usb_device *udev = port->serial->dev;
1da177e4
LT		 913 char buf[1];
914 int v = simple_strtoul(valbuf, NULL, 10);
915 int rv = 0;
5c09d144 916
1da177e4 917 dbg("%s: setting event char = %i", __FUNCTION__, v);
5c09d144 918
1da177e4
LT		 919 rv = usb_control_msg(udev,
920 usb_sndctrlpipe(udev, 0),
921 FTDI_SIO_SET_EVENT_CHAR_REQUEST,
922 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE,
5c09d144 923 v, priv->interface,
1da177e4 924 buf, 0, WDR_TIMEOUT);
5c09d144 925
1da177e4
LT		 926 if (rv < 0) {
927 dbg("Unable to write event character: %i", rv);
928 return -EIO;
929 }
5c09d144 930
1da177e4
LT		 931 return count;
932}
933
934static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer);
935static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);
936
12bdbe03 937static int create_sysfs_attrs(struct usb_serial_port *port)
13f4db9e 938{
12bdbe03 939 struct ftdi_private *priv = usb_get_serial_port_data(port);
13f4db9e 940 int retval = 0;
1da177e4
LT		 941
942 dbg("%s",__FUNCTION__);
13f4db9e 943
1da177e4
LT		 944 /* XXX I've no idea if the original SIO supports the event_char
945 * sysfs parameter, so I'm playing it safe. */
946 if (priv->chip_type != SIO) {
947 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]);
12bdbe03 948 retval = device_create_file(&port->dev, &dev_attr_event_char);
13f4db9e 949 if ((!retval) &&
97cd49eb
SM		 950 (priv->chip_type == FT232BM ||
951 priv->chip_type == FT2232C ||
952 priv->chip_type == FT232RL)) {
12bdbe03 953 retval = device_create_file(&port->dev,
13f4db9e 954 &dev_attr_latency_timer);
1da177e4
LT		 955 }
956 }
13f4db9e 957 return retval;
1da177e4
LT		 958}
959
12bdbe03 960static void remove_sysfs_attrs(struct usb_serial_port *port)
1da177e4 961{
12bdbe03 962 struct ftdi_private *priv = usb_get_serial_port_data(port);
1da177e4 963
5c09d144 964 dbg("%s",__FUNCTION__);
1da177e4 965
1da177e4
LT		 966 /* XXX see create_sysfs_attrs */
967 if (priv->chip_type != SIO) {
12bdbe03 968 device_remove_file(&port->dev, &dev_attr_event_char);
ed6e5282
AB		 969 if (priv->chip_type == FT232BM ||
970 priv->chip_type == FT2232C ||
971 priv->chip_type == FT232RL) {
12bdbe03 972 device_remove_file(&port->dev, &dev_attr_latency_timer);
1da177e4
LT		 973 }
974 }
5c09d144 975
1da177e4
LT		 976}
977
978/*
979 * ***************************************************************************
980 * FTDI driver specific functions
981 * ***************************************************************************
982 */
983
8f977e42
IA		 984/* Probe function to check for special devices */
985static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id)
986{
fa91d43b
TL		 987 struct ftdi_sio_quirk *quirk = (struct ftdi_sio_quirk *)id->driver_info;
988
989 if (quirk && quirk->probe) {
990 int ret = quirk->probe(serial);
991 if (ret != 0)
992 return ret;
993 }
994
8f977e42
IA		 995 usb_set_serial_data(serial, (void *)id->driver_info);
996
fa91d43b 997 return 0;
8f977e42
IA		 998}
999
12bdbe03 1000static int ftdi_sio_port_probe(struct usb_serial_port *port)
1da177e4 1001{
1da177e4 1002 struct ftdi_private *priv;
0ffbbe25
ON		 1003 struct ftdi_sio_quirk *quirk = usb_get_serial_data(port->serial);
1004
13f4db9e 1005
1da177e4
LT		 1006 dbg("%s",__FUNCTION__);
1007
80b6ca48 1008 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL);
1da177e4
LT		 1009 if (!priv){
1010 err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private));
1011 return -ENOMEM;
1012 }
1da177e4
LT		 1013
1014 spin_lock_init(&priv->rx_lock);
22465400 1015 spin_lock_init(&priv->tx_lock);
1da177e4
LT		 1016 init_waitqueue_head(&priv->delta_msr_wait);
1017 /* This will push the characters through immediately rather
1018 than queue a task to deliver them */
1019 priv->flags = ASYNC_LOW_LATENCY;
1020
0ffbbe25
ON		 1021 if (quirk && quirk->port_probe)
1022 quirk->port_probe(priv);
1023
1da177e4 1024 /* Increase the size of read buffers */
1bc3c9e1 1025 kfree(port->bulk_in_buffer);
1da177e4
LT		 1026 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL);
1027 if (!port->bulk_in_buffer) {
1028 kfree (priv);
1029 return -ENOMEM;
1030 }
1031 if (port->read_urb) {
1032 port->read_urb->transfer_buffer = port->bulk_in_buffer;
1033 port->read_urb->transfer_buffer_length = BUFSZ;
1034 }
1035
c4028958
DH		 1036 INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read);
1037 priv->port = port;
76854cea 1038
1da177e4
LT		 1039 /* Free port's existing write urb and transfer buffer. */
1040 if (port->write_urb) {
1041 usb_free_urb (port->write_urb);
1042 port->write_urb = NULL;
1043 }
1bc3c9e1
JJ		 1044 kfree(port->bulk_out_buffer);
1045 port->bulk_out_buffer = NULL;
1da177e4 1046
12bdbe03 1047 usb_set_serial_port_data(port, priv);
1da177e4 1048
12bdbe03
JR		 1049 ftdi_determine_type (port);
1050 create_sysfs_attrs(port);
1051 return 0;
1052}
1da177e4 1053
8f977e42
IA		 1054/* Setup for the USB-UIRT device, which requires hardwired
1055 * baudrate (38400 gets mapped to 312500) */
1da177e4 1056/* Called from usbserial:serial_probe */
0ffbbe25 1057static void ftdi_USB_UIRT_setup (struct ftdi_private *priv)
8f977e42 1058{
1da177e4 1059 dbg("%s",__FUNCTION__);
1da177e4 1060
1da177e4
LT		 1061 priv->flags |= ASYNC_SPD_CUST;
1062 priv->custom_divisor = 77;
669a6db1 1063 priv->force_baud = 38400;
8f977e42 1064} /* ftdi_USB_UIRT_setup */
1da177e4 1065
8f977e42
IA		 1066/* Setup for the HE-TIRA1 device, which requires hardwired
1067 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */
0ffbbe25 1068static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv)
8f977e42 1069{
1da177e4 1070 dbg("%s",__FUNCTION__);
1da177e4 1071
1da177e4
LT		 1072 priv->flags |= ASYNC_SPD_CUST;
1073 priv->custom_divisor = 240;
669a6db1 1074 priv->force_baud = 38400;
1da177e4 1075 priv->force_rtscts = 1;
8f977e42 1076} /* ftdi_HE_TIRA1_setup */
1da177e4 1077
fa91d43b 1078/*
20734345
HW		 1079 * First port on JTAG adaptors such as Olimex arm-usb-ocd or the FIC/OpenMoko
1080 * Neo1973 Debug Board is reserved for JTAG interface and can be accessed from
1081 * userspace using openocd.
fa91d43b 1082 */
20734345 1083static int ftdi_jtag_probe(struct usb_serial *serial)
fa91d43b
TL		 1084{
1085 struct usb_device *udev = serial->dev;
1086 struct usb_interface *interface = serial->interface;
1087
1088 dbg("%s",__FUNCTION__);
1089
1090 if (interface == udev->actconfig->interface[0]) {
20734345 1091 info("Ignoring serial port reserved for JTAG");
fa91d43b
TL		 1092 return -ENODEV;
1093 }
1094
1095 return 0;
1096}
1da177e4 1097
546d7eec
KV		 1098/*
1099 * The Matrix Orbital VK204-25-USB has an invalid IN endpoint.
1100 * We have to correct it if we want to read from it.
1101 */
1102static int ftdi_mtxorb_hack_setup(struct usb_serial *serial)
1103{
1104 struct usb_host_endpoint *ep = serial->dev->ep_in[1];
1105 struct usb_endpoint_descriptor *ep_desc = &ep->desc;
1106
1107 if (ep->enabled && ep_desc->wMaxPacketSize == 0) {
1108 ep_desc->wMaxPacketSize = 0x40;
1109 info("Fixing invalid wMaxPacketSize on read pipe");
1110 }
1111
1112 return 0;
1113}
1114
5c09d144 1115/* ftdi_shutdown is called from usbserial:usb_serial_disconnect
1da177e4
LT		 1116 * it is called when the usb device is disconnected
1117 *
1118 * usbserial:usb_serial_disconnect
1119 * calls __serial_close for each open of the port
1120 * shutdown is called then (ie ftdi_shutdown)
1121 */
1da177e4 1122static void ftdi_shutdown (struct usb_serial *serial)
12bdbe03
JR		 1123{
1124 dbg("%s", __FUNCTION__);
1125}
5c09d144 1126
12bdbe03
JR		 1127static int ftdi_sio_port_remove(struct usb_serial_port *port)
1128{
1da177e4
LT		 1129 struct ftdi_private *priv = usb_get_serial_port_data(port);
1130
1131 dbg("%s", __FUNCTION__);
1132
12bdbe03 1133 remove_sysfs_attrs(port);
5c09d144
DB		 1134
1135 /* all open ports are closed at this point
1136 * (by usbserial.c:__serial_close, which calls ftdi_close)
1da177e4
LT		 1137 */
1138
1139 if (priv) {
1140 usb_set_serial_port_data(port, NULL);
1141 kfree(priv);
1142 }
1da177e4 1143
12bdbe03
JR		 1144 return 0;
1145}
1da177e4
LT		 1146
1147static int ftdi_open (struct usb_serial_port *port, struct file *filp)
1148{ /* ftdi_open */
1da177e4
LT		 1149 struct usb_device *dev = port->serial->dev;
1150 struct ftdi_private *priv = usb_get_serial_port_data(port);
1151 unsigned long flags;
5c09d144 1152
1da177e4
LT		 1153 int result = 0;
1154 char buf[1]; /* Needed for the usb_control_msg I think */
1155
1156 dbg("%s", __FUNCTION__);
1157
22465400
IA		 1158 spin_lock_irqsave(&priv->tx_lock, flags);
1159 priv->tx_bytes = 0;
1160 spin_unlock_irqrestore(&priv->tx_lock, flags);
1161 spin_lock_irqsave(&priv->rx_lock, flags);
1162 priv->rx_bytes = 0;
1163 spin_unlock_irqrestore(&priv->rx_lock, flags);
1164
57845bd1
GL		 1165 if (port->tty)
1166 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1da177e4
LT		 1167
1168 /* No error checking for this (will get errors later anyway) */
1169 /* See ftdi_sio.h for description of what is reset */
1170 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
5c09d144
DB		 1171 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
1172 FTDI_SIO_RESET_SIO,
1da177e4
LT		 1173 priv->interface, buf, 0, WDR_TIMEOUT);
1174
1175 /* Termios defaults are set by usb_serial_init. We don't change
1176 port->tty->termios - this would loose speed settings, etc.
1177 This is same behaviour as serial.c/rs_open() - Kuba */
1178
1179 /* ftdi_set_termios will send usb control messages */
57845bd1 1180 if (port->tty)
669a6db1 1181 ftdi_set_termios(port, port->tty->termios);
1da177e4
LT		 1182
1183 /* FIXME: Flow control might be enabled, so it should be checked -
1184 we have no control of defaults! */
1185 /* Turn on RTS and DTR since we are not flow controlling by default */
74ede0ff 1186 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1da177e4
LT		 1187
1188 /* Not throttled */
1189 spin_lock_irqsave(&priv->rx_lock, flags);
1190 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
1191 spin_unlock_irqrestore(&priv->rx_lock, flags);
1192
1193 /* Start reading from the device */
76854cea 1194 priv->rx_processed = 0;
1da177e4
LT		 1195 usb_fill_bulk_urb(port->read_urb, dev,
1196 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
1197 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1198 ftdi_read_bulk_callback, port);
1199 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
1200 if (result)
1201 err("%s - failed submitting read urb, error %d", __FUNCTION__, result);
1202
1203
1204 return result;
1205} /* ftdi_open */
1206
1207
1208
5c09d144 1209/*
1da177e4
LT		 1210 * usbserial:__serial_close only calls ftdi_close if the point is open
1211 *
1212 * This only gets called when it is the last close
5c09d144
DB		 1213 *
1214 *
1da177e4
LT		 1215 */
1216
1217static void ftdi_close (struct usb_serial_port *port, struct file *filp)
1218{ /* ftdi_close */
1219 unsigned int c_cflag = port->tty->termios->c_cflag;
1220 struct ftdi_private *priv = usb_get_serial_port_data(port);
1221 char buf[1];
1222
1223 dbg("%s", __FUNCTION__);
1224
95bef012
ON		 1225 mutex_lock(&port->serial->disc_mutex);
1226 if (c_cflag & HUPCL && !port->serial->disconnected){
1da177e4 1227 /* Disable flow control */
5c09d144 1228 if (usb_control_msg(port->serial->dev,
1da177e4
LT		 1229 usb_sndctrlpipe(port->serial->dev, 0),
1230 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1231 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1232 0, priv->interface, buf, 0,
1233 WDR_TIMEOUT) < 0) {
1234 err("error from flowcontrol urb");
5c09d144 1235 }
1da177e4 1236
74ede0ff
IA		 1237 /* drop RTS and DTR */
1238 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1da177e4 1239 } /* Note change no line if hupcl is off */
95bef012 1240 mutex_unlock(&port->serial->disc_mutex);
76854cea
IA		 1241
1242 /* cancel any scheduled reading */
1243 cancel_delayed_work(&priv->rx_work);
1244 flush_scheduled_work();
5c09d144 1245
1da177e4 1246 /* shutdown our bulk read */
794c944e 1247 usb_kill_urb(port->read_urb);
1da177e4
LT		 1248} /* ftdi_close */
1249
1250
5c09d144 1251
1da177e4
LT		 1252/* The SIO requires the first byte to have:
1253 * B0 1
1254 * B1 0
1255 * B2..7 length of message excluding byte 0
1256 *
1257 * The new devices do not require this byte
1258 */
1259static int ftdi_write (struct usb_serial_port *port,
1260 const unsigned char *buf, int count)
1261{ /* ftdi_write */
1262 struct ftdi_private *priv = usb_get_serial_port_data(port);
1263 struct urb *urb;
1264 unsigned char *buffer;
1265 int data_offset ; /* will be 1 for the SIO and 0 otherwise */
1266 int status;
1267 int transfer_size;
22465400 1268 unsigned long flags;
1da177e4
LT		 1269
1270 dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count);
1271
1272 if (count == 0) {
1273 dbg("write request of 0 bytes");
1274 return 0;
1275 }
22465400
IA		 1276 spin_lock_irqsave(&priv->tx_lock, flags);
1277 if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) {
1278 spin_unlock_irqrestore(&priv->tx_lock, flags);
1279 dbg("%s - write limit hit\n", __FUNCTION__);
1280 return 0;
1281 }
62127a58 1282 priv->tx_outstanding_urbs++;
22465400 1283 spin_unlock_irqrestore(&priv->tx_lock, flags);
5c09d144 1284
1da177e4
LT		 1285 data_offset = priv->write_offset;
1286 dbg("data_offset set to %d",data_offset);
1287
1288 /* Determine total transfer size */
1289 transfer_size = count;
1290 if (data_offset > 0) {
1291 /* Original sio needs control bytes too... */
1292 transfer_size += (data_offset *
1293 ((count + (PKTSZ - 1 - data_offset)) /
1294 (PKTSZ - data_offset)));
1295 }
1296
1297 buffer = kmalloc (transfer_size, GFP_ATOMIC);
1298 if (!buffer) {
1299 err("%s ran out of kernel memory for urb ...", __FUNCTION__);
62127a58
ON		 1300 count = -ENOMEM;
1301 goto error_no_buffer;
1da177e4
LT		 1302 }
1303
1304 urb = usb_alloc_urb(0, GFP_ATOMIC);
1305 if (!urb) {
1306 err("%s - no more free urbs", __FUNCTION__);
62127a58
ON		 1307 count = -ENOMEM;
1308 goto error_no_urb;
1da177e4
LT		 1309 }
1310
1311 /* Copy data */
1312 if (data_offset > 0) {
1313 /* Original sio requires control byte at start of each packet. */
1314 int user_pktsz = PKTSZ - data_offset;
1315 int todo = count;
1316 unsigned char *first_byte = buffer;
1317 const unsigned char *current_position = buf;
1318
1319 while (todo > 0) {
1320 if (user_pktsz > todo) {
1321 user_pktsz = todo;
1322 }
1323 /* Write the control byte at the front of the packet*/
5c09d144 1324 *first_byte = 1 | ((user_pktsz) << 2);
1da177e4
LT		 1325 /* Copy data for packet */
1326 memcpy (first_byte + data_offset,
1327 current_position, user_pktsz);
1328 first_byte += user_pktsz + data_offset;
1329 current_position += user_pktsz;
1330 todo -= user_pktsz;
1331 }
1332 } else {
1333 /* No control byte required. */
1334 /* Copy in the data to send */
1335 memcpy (buffer, buf, count);
1336 }
1337
1338 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer);
1339
1340 /* fill the buffer and send it */
5c09d144 1341 usb_fill_bulk_urb(urb, port->serial->dev,
1da177e4
LT		 1342 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
1343 buffer, transfer_size,
1344 ftdi_write_bulk_callback, port);
1345
1346 status = usb_submit_urb(urb, GFP_ATOMIC);
1347 if (status) {
1348 err("%s - failed submitting write urb, error %d", __FUNCTION__, status);
1349 count = status;
62127a58 1350 goto error;
22465400
IA		 1351 } else {
1352 spin_lock_irqsave(&priv->tx_lock, flags);
22465400
IA		 1353 priv->tx_outstanding_bytes += count;
1354 priv->tx_bytes += count;
1355 spin_unlock_irqrestore(&priv->tx_lock, flags);
1da177e4
LT		 1356 }
1357
1358 /* we are done with this urb, so let the host driver
1359 * really free it when it is finished with it */
62127a58 1360 usb_free_urb(urb);
1da177e4
LT		 1361
1362 dbg("%s write returning: %d", __FUNCTION__, count);
1363 return count;
62127a58
ON		 1364error:
1365 usb_free_urb(urb);
1366error_no_urb:
1367 kfree (buffer);
1368error_no_buffer:
1369 spin_lock_irqsave(&priv->tx_lock, flags);
1370 priv->tx_outstanding_urbs--;
1371 spin_unlock_irqrestore(&priv->tx_lock, flags);
1372 return count;
1da177e4
LT		 1373} /* ftdi_write */
1374
1375
1376/* This function may get called when the device is closed */
1377
7d12e780 1378static void ftdi_write_bulk_callback (struct urb *urb)
1da177e4 1379{
22465400 1380 unsigned long flags;
1da177e4 1381 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
22465400
IA		 1382 struct ftdi_private *priv;
1383 int data_offset; /* will be 1 for the SIO and 0 otherwise */
1384 unsigned long countback;
0fb0aa18 1385 int status = urb->status;
1da177e4
LT		 1386
1387 /* free up the transfer buffer, as usb_free_urb() does not do this */
1388 kfree (urb->transfer_buffer);
1389
1390 dbg("%s - port %d", __FUNCTION__, port->number);
5c09d144 1391
0fb0aa18
GKH		 1392 if (status) {
1393 dbg("nonzero write bulk status received: %d", status);
1da177e4
LT		 1394 return;
1395 }
1396
22465400
IA		 1397 priv = usb_get_serial_port_data(port);
1398 if (!priv) {
1399 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1400 return;
1401 }
1402 /* account for transferred data */
1403 countback = urb->actual_length;
1404 data_offset = priv->write_offset;
1405 if (data_offset > 0) {
1406 /* Subtract the control bytes */
1407 countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ));
1408 }
1409 spin_lock_irqsave(&priv->tx_lock, flags);
1410 --priv->tx_outstanding_urbs;
1411 priv->tx_outstanding_bytes -= countback;
1412 spin_unlock_irqrestore(&priv->tx_lock, flags);
1413
cf2c7481 1414 usb_serial_port_softint(port);
1da177e4
LT		 1415} /* ftdi_write_bulk_callback */
1416
1417
1418static int ftdi_write_room( struct usb_serial_port *port )
1419{
22465400
IA		 1420 struct ftdi_private *priv = usb_get_serial_port_data(port);
1421 int room;
1422 unsigned long flags;
1423
1da177e4
LT		 1424 dbg("%s - port %d", __FUNCTION__, port->number);
1425
22465400
IA		 1426 spin_lock_irqsave(&priv->tx_lock, flags);
1427 if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) {
1428 /*
1429 * We really can take anything the user throws at us
1430 * but let's pick a nice big number to tell the tty
1431 * layer that we have lots of free space
1432 */
1433 room = 2048;
1434 } else {
1435 room = 0;
1436 }
1437 spin_unlock_irqrestore(&priv->tx_lock, flags);
1438 return room;
1da177e4
LT		 1439} /* ftdi_write_room */
1440
1441
1442static int ftdi_chars_in_buffer (struct usb_serial_port *port)
1443{ /* ftdi_chars_in_buffer */
22465400
IA		 1444 struct ftdi_private *priv = usb_get_serial_port_data(port);
1445 int buffered;
1446 unsigned long flags;
1447
1da177e4
LT		 1448 dbg("%s - port %d", __FUNCTION__, port->number);
1449
22465400
IA		 1450 spin_lock_irqsave(&priv->tx_lock, flags);
1451 buffered = (int)priv->tx_outstanding_bytes;
1452 spin_unlock_irqrestore(&priv->tx_lock, flags);
1453 if (buffered < 0) {
1454 err("%s outstanding tx bytes is negative!", __FUNCTION__);
1455 buffered = 0;
1456 }
1457 return buffered;
1da177e4
LT		 1458} /* ftdi_chars_in_buffer */
1459
1460
1461
7d12e780 1462static void ftdi_read_bulk_callback (struct urb *urb)
1da177e4
LT		 1463{ /* ftdi_read_bulk_callback */
1464 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1465 struct tty_struct *tty;
1466 struct ftdi_private *priv;
22465400
IA		 1467 unsigned long countread;
1468 unsigned long flags;
0fb0aa18 1469 int status = urb->status;
1da177e4
LT		 1470
1471 if (urb->number_of_packets > 0) {
1472 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__,
1473 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets );
1474 err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags );
1475 }
1476
1477 dbg("%s - port %d", __FUNCTION__, port->number);
1478
1479 if (port->open_count <= 0)
1480 return;
1481
1482 tty = port->tty;
1483 if (!tty) {
1484 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1485 return;
1486 }
1487
1488 priv = usb_get_serial_port_data(port);
1489 if (!priv) {
1490 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1491 return;
1492 }
1493
1494 if (urb != port->read_urb) {
1495 err("%s - Not my urb!", __FUNCTION__);
1496 }
1497
0fb0aa18 1498 if (status) {
1da177e4 1499 /* This will happen at close every time so it is a dbg not an err */
0fb0aa18
GKH		 1500 dbg("(this is ok on close) nonzero read bulk status received: "
1501 "%d", status);
1da177e4
LT		 1502 return;
1503 }
1504
22465400
IA		 1505 /* count data bytes, but not status bytes */
1506 countread = urb->actual_length;
1507 countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ);
1508 spin_lock_irqsave(&priv->rx_lock, flags);
1509 priv->rx_bytes += countread;
1510 spin_unlock_irqrestore(&priv->rx_lock, flags);
1511
c4028958 1512 ftdi_process_read(&priv->rx_work.work);
1da177e4
LT		 1513
1514} /* ftdi_read_bulk_callback */
1515
1516
c4028958 1517static void ftdi_process_read (struct work_struct *work)
1da177e4 1518{ /* ftdi_process_read */
c4028958
DH		 1519 struct ftdi_private *priv =
1520 container_of(work, struct ftdi_private, rx_work.work);
1521 struct usb_serial_port *port = priv->port;
1da177e4
LT		 1522 struct urb *urb;
1523 struct tty_struct *tty;
1da177e4 1524 char error_flag;
5c09d144 1525 unsigned char *data;
1da177e4
LT		 1526
1527 int i;
1528 int result;
1529 int need_flip;
1530 int packet_offset;
76854cea 1531 unsigned long flags;
1da177e4
LT		 1532
1533 dbg("%s - port %d", __FUNCTION__, port->number);
1534
1535 if (port->open_count <= 0)
1536 return;
1537
1538 tty = port->tty;
1539 if (!tty) {
1540 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1541 return;
1542 }
1543
1544 priv = usb_get_serial_port_data(port);
1545 if (!priv) {
1546 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1547 return;
1548 }
1549
1550 urb = port->read_urb;
1551 if (!urb) {
1552 dbg("%s - bad read_urb pointer - exiting", __FUNCTION__);
1553 return;
1554 }
1555
1556 data = urb->transfer_buffer;
1557
76854cea
IA		 1558 if (priv->rx_processed) {
1559 dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__,
1560 priv->rx_processed,
1561 urb->actual_length - priv->rx_processed);
1da177e4 1562 } else {
76854cea
IA		 1563 /* The first two bytes of every read packet are status */
1564 if (urb->actual_length > 2) {
1565 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1566 } else {
1567 dbg("Status only: %03oo %03oo",data[0],data[1]);
1568 }
1569 }
1da177e4
LT		 1570
1571
1572 /* TO DO -- check for hung up line and handle appropriately: */
1573 /* send hangup */
1574 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */
1575 /* if CD is dropped and the line is not CLOCAL then we should hangup */
1576
1577 need_flip = 0;
76854cea
IA		 1578 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) {
1579 int length;
1580
1da177e4 1581 /* Compare new line status to the old one, signal if different */
76854cea
IA		 1582 /* N.B. packet may be processed more than once, but differences
1583 * are only processed once. */
1da177e4
LT		 1584 if (priv != NULL) {
1585 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK;
1586 if (new_status != priv->prev_status) {
1587 priv->diff_status |= new_status ^ priv->prev_status;
1588 wake_up_interruptible(&priv->delta_msr_wait);
1589 priv->prev_status = new_status;
1590 }
1591 }
1592
76854cea
IA		 1593 length = min(PKTSZ, urb->actual_length-packet_offset)-2;
1594 if (length < 0) {
1595 err("%s - bad packet length: %d", __FUNCTION__, length+2);
1596 length = 0;
1597 }
1598
76854cea
IA		 1599 if (priv->rx_flags & THROTTLED) {
1600 dbg("%s - throttled", __FUNCTION__);
1601 break;
1602 }
33f0f88f 1603 if (tty_buffer_request_room(tty, length) < length) {
76854cea
IA		 1604 /* break out & wait for throttling/unthrottling to happen */
1605 dbg("%s - receive room low", __FUNCTION__);
1606 break;
1607 }
1608
1da177e4
LT		 1609 /* Handle errors and break */
1610 error_flag = TTY_NORMAL;
1611 /* Although the device uses a bitmask and hence can have multiple */
1612 /* errors on a packet - the order here sets the priority the */
1613 /* error is returned to the tty layer */
1614
1615 if ( data[packet_offset+1] & FTDI_RS_OE ) {
1616 error_flag = TTY_OVERRUN;
1617 dbg("OVERRRUN error");
1618 }
1619 if ( data[packet_offset+1] & FTDI_RS_BI ) {
1620 error_flag = TTY_BREAK;
1621 dbg("BREAK received");
1622 }
1623 if ( data[packet_offset+1] & FTDI_RS_PE ) {
1624 error_flag = TTY_PARITY;
1625 dbg("PARITY error");
1626 }
1627 if ( data[packet_offset+1] & FTDI_RS_FE ) {
1628 error_flag = TTY_FRAME;
1629 dbg("FRAMING error");
1630 }
76854cea
IA		 1631 if (length > 0) {
1632 for (i = 2; i < length+2; i++) {
5c09d144 1633 /* Note that the error flag is duplicated for
1da177e4
LT		 1634 every character received since we don't know
1635 which character it applied to */
1636 tty_insert_flip_char(tty, data[packet_offset+i], error_flag);
1637 }
1638 need_flip = 1;
1639 }
1640
1641#ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW
1642 /* if a parity error is detected you get status packets forever
1643 until a character is sent without a parity error.
1644 This doesn't work well since the application receives a never
1645 ending stream of bad data - even though new data hasn't been sent.
1646 Therefore I (bill) have taken this out.
5c09d144 1647 However - this might make sense for framing errors and so on
1da177e4
LT		 1648 so I am leaving the code in for now.
1649 */
1650 else {
1651 if (error_flag != TTY_NORMAL){
1652 dbg("error_flag is not normal");
1653 /* In this case it is just status - if that is an error send a bad character */
1654 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
1655 tty_flip_buffer_push(tty);
1656 }
1657 tty_insert_flip_char(tty, 0xff, error_flag);
1658 need_flip = 1;
1659 }
1660 }
1661#endif
1662 } /* "for(packet_offset=0..." */
1663
1664 /* Low latency */
1665 if (need_flip) {
1666 tty_flip_buffer_push(tty);
1667 }
1668
76854cea
IA		 1669 if (packet_offset < urb->actual_length) {
1670 /* not completely processed - record progress */
1671 priv->rx_processed = packet_offset;
1672 dbg("%s - incomplete, %d bytes processed, %d remain",
1673 __FUNCTION__, packet_offset,
1674 urb->actual_length - packet_offset);
1675 /* check if we were throttled while processing */
1676 spin_lock_irqsave(&priv->rx_lock, flags);
1677 if (priv->rx_flags & THROTTLED) {
1678 priv->rx_flags |= ACTUALLY_THROTTLED;
1679 spin_unlock_irqrestore(&priv->rx_lock, flags);
1680 dbg("%s - deferring remainder until unthrottled",
1681 __FUNCTION__);
1682 return;
1683 }
1684 spin_unlock_irqrestore(&priv->rx_lock, flags);
1685 /* if the port is closed stop trying to read */
1686 if (port->open_count > 0){
1687 /* delay processing of remainder */
1688 schedule_delayed_work(&priv->rx_work, 1);
1689 } else {
1690 dbg("%s - port is closed", __FUNCTION__);
1691 }
1692 return;
1693 }
1694
1695 /* urb is completely processed */
1696 priv->rx_processed = 0;
1697
1da177e4
LT		 1698 /* if the port is closed stop trying to read */
1699 if (port->open_count > 0){
1700 /* Continue trying to always read */
5c09d144 1701 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1da177e4
LT		 1702 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
1703 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1704 ftdi_read_bulk_callback, port);
1705
1706 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1707 if (result)
1708 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1709 }
1710
1711 return;
1712} /* ftdi_process_read */
1713
1714
1715static void ftdi_break_ctl( struct usb_serial_port *port, int break_state )
1716{
1717 struct ftdi_private *priv = usb_get_serial_port_data(port);
5c09d144 1718 __u16 urb_value = 0;
1da177e4 1719 char buf[1];
5c09d144 1720
1da177e4
LT		 1721 /* break_state = -1 to turn on break, and 0 to turn off break */
1722 /* see drivers/char/tty_io.c to see it used */
1723 /* last_set_data_urb_value NEVER has the break bit set in it */
1724
1725 if (break_state) {
1726 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
1727 } else {
5c09d144 1728 urb_value = priv->last_set_data_urb_value;
1da177e4
LT		 1729 }
1730
5c09d144 1731
1da177e4 1732 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
5c09d144 1733 FTDI_SIO_SET_DATA_REQUEST,
1da177e4
LT		 1734 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1735 urb_value , priv->interface,
1736 buf, 0, WDR_TIMEOUT) < 0) {
1737 err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state);
5c09d144 1738 }
1da177e4
LT		 1739
1740 dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value);
5c09d144 1741
1da177e4
LT		 1742}
1743
1744
1745/* old_termios contains the original termios settings and tty->termios contains
1746 * the new setting to be used
1747 * WARNING: set_termios calls this with old_termios in kernel space
1748 */
1749
606d099c 1750static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
1da177e4
LT		 1751{ /* ftdi_termios */
1752 struct usb_device *dev = port->serial->dev;
1da177e4 1753 struct ftdi_private *priv = usb_get_serial_port_data(port);
669a6db1
AC		 1754 struct ktermios *termios = port->tty->termios;
1755 unsigned int cflag = termios->c_cflag;
1da177e4
LT		 1756 __u16 urb_value; /* will hold the new flags */
1757 char buf[1]; /* Perhaps I should dynamically alloc this? */
5c09d144 1758
1da177e4 1759 // Added for xon/xoff support
669a6db1 1760 unsigned int iflag = termios->c_iflag;
1da177e4
LT		 1761 unsigned char vstop;
1762 unsigned char vstart;
5c09d144 1763
1da177e4
LT		 1764 dbg("%s", __FUNCTION__);
1765
1766 /* Force baud rate if this device requires it, unless it is set to B0. */
669a6db1 1767 if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) {
1da177e4 1768 dbg("%s: forcing baud rate for this device", __FUNCTION__);
bd5e47cc
AM		 1769 tty_encode_baud_rate(port->tty, priv->force_baud,
1770 priv->force_baud);
1da177e4
LT		 1771 }
1772
1773 /* Force RTS-CTS if this device requires it. */
1774 if (priv->force_rtscts) {
1775 dbg("%s: forcing rtscts for this device", __FUNCTION__);
669a6db1 1776 termios->c_cflag |= CRTSCTS;
1da177e4
LT		 1777 }
1778
669a6db1 1779 cflag = termios->c_cflag;
1da177e4 1780
5c09d144
DB		 1781 /* FIXME -For this cut I don't care if the line is really changing or
1782 not - so just do the change regardless - should be able to
1da177e4 1783 compare old_termios and tty->termios */
5c09d144
DB		 1784 /* NOTE These routines can get interrupted by
1785 ftdi_sio_read_bulk_callback - need to examine what this
1da177e4 1786 means - don't see any problems yet */
5c09d144 1787
1da177e4 1788 /* Set number of data bits, parity, stop bits */
5c09d144 1789
669a6db1
AC		 1790 termios->c_cflag &= ~CMSPAR;
1791
1da177e4
LT		 1792 urb_value = 0;
1793 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
1794 FTDI_SIO_SET_DATA_STOP_BITS_1);
5c09d144
DB		 1795 urb_value |= (cflag & PARENB ?
1796 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
1da177e4
LT		 1797 FTDI_SIO_SET_DATA_PARITY_EVEN) :
1798 FTDI_SIO_SET_DATA_PARITY_NONE);
1799 if (cflag & CSIZE) {
1800 switch (cflag & CSIZE) {
1801 case CS5: urb_value |= 5; dbg("Setting CS5"); break;
1802 case CS6: urb_value |= 6; dbg("Setting CS6"); break;
1803 case CS7: urb_value |= 7; dbg("Setting CS7"); break;
1804 case CS8: urb_value |= 8; dbg("Setting CS8"); break;
1805 default:
1806 err("CSIZE was set but not CS5-CS8");
1807 }
1808 }
1809
1810 /* This is needed by the break command since it uses the same command - but is
1811 * or'ed with this value */
1812 priv->last_set_data_urb_value = urb_value;
5c09d144 1813
1da177e4 1814 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
5c09d144 1815 FTDI_SIO_SET_DATA_REQUEST,
1da177e4
LT		 1816 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1817 urb_value , priv->interface,
279e1545 1818 buf, 0, WDR_SHORT_TIMEOUT) < 0) {
1da177e4 1819 err("%s FAILED to set databits/stopbits/parity", __FUNCTION__);
5c09d144 1820 }
1da177e4
LT		 1821
1822 /* Now do the baudrate */
1823 if ((cflag & CBAUD) == B0 ) {
1824 /* Disable flow control */
1825 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
5c09d144 1826 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1da177e4 1827 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
5c09d144 1828 0, priv->interface,
1da177e4
LT		 1829 buf, 0, WDR_TIMEOUT) < 0) {
1830 err("%s error from disable flowcontrol urb", __FUNCTION__);
5c09d144 1831 }
1da177e4 1832 /* Drop RTS and DTR */
74ede0ff 1833 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1da177e4
LT		 1834 } else {
1835 /* set the baudrate determined before */
1836 if (change_speed(port)) {
72a755fc
PF		 1837 err("%s urb failed to set baudrate", __FUNCTION__);
1838 }
1839 /* Ensure RTS and DTR are raised when baudrate changed from 0 */
57845bd1 1840 if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) {
72a755fc 1841 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1da177e4 1842 }
1da177e4
LT		 1843 }
1844
1845 /* Set flow control */
1846 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
1847 if (cflag & CRTSCTS) {
1848 dbg("%s Setting to CRTSCTS flow control", __FUNCTION__);
5c09d144 1849 if (usb_control_msg(dev,
1da177e4 1850 usb_sndctrlpipe(dev, 0),
5c09d144 1851 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1da177e4
LT		 1852 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1853 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
1854 buf, 0, WDR_TIMEOUT) < 0) {
1855 err("urb failed to set to rts/cts flow control");
5c09d144
DB		 1856 }
1857
1858 } else {
1da177e4
LT		 1859 /*
1860 * Xon/Xoff code
1861 *
1862 * Check the IXOFF status in the iflag component of the termios structure
1863 * if IXOFF is not set, the pre-xon/xoff code is executed.
1864 */
1865 if (iflag & IXOFF) {
1866 dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag);
1867 // Try to enable the XON/XOFF on the ftdi_sio
1868 // Set the vstart and vstop -- could have been done up above where
1869 // a lot of other dereferencing is done but that would be very
1870 // inefficient as vstart and vstop are not always needed
669a6db1
AC		 1871 vstart = termios->c_cc[VSTART];
1872 vstop = termios->c_cc[VSTOP];
1da177e4
LT		 1873 urb_value=(vstop << 8) | (vstart);
1874
1875 if (usb_control_msg(dev,
1876 usb_sndctrlpipe(dev, 0),
1877 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1878 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1879 urb_value , (FTDI_SIO_XON_XOFF_HS
1880 | priv->interface),
1881 buf, 0, WDR_TIMEOUT) < 0) {
1882 err("urb failed to set to xon/xoff flow control");
1883 }
1884 } else {
1885 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */
1886 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */
1887 dbg("%s Turning off hardware flow control", __FUNCTION__);
5c09d144 1888 if (usb_control_msg(dev,
1da177e4 1889 usb_sndctrlpipe(dev, 0),
5c09d144 1890 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1da177e4 1891 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
5c09d144 1892 0, priv->interface,
1da177e4
LT		 1893 buf, 0, WDR_TIMEOUT) < 0) {
1894 err("urb failed to clear flow control");
5c09d144 1895 }
1da177e4 1896 }
5c09d144 1897
1da177e4
LT		 1898 }
1899 return;
1900} /* ftdi_termios */
1901
1902
1903static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file)
1904{
1905 struct ftdi_private *priv = usb_get_serial_port_data(port);
1906 unsigned char buf[2];
1907 int ret;
1908
1909 dbg("%s TIOCMGET", __FUNCTION__);
1910 switch (priv->chip_type) {
1911 case SIO:
1912 /* Request the status from the device */
5c09d144 1913 if ((ret = usb_control_msg(port->serial->dev,
1da177e4 1914 usb_rcvctrlpipe(port->serial->dev, 0),
5c09d144 1915 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1da177e4 1916 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
5c09d144 1917 0, 0,
1da177e4
LT		 1918 buf, 1, WDR_TIMEOUT)) < 0 ) {
1919 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
1920 ret);
1921 return(ret);
1922 }
1923 break;
1924 case FT8U232AM:
1925 case FT232BM:
1926 case FT2232C:
ed6e5282 1927 case FT232RL:
1da177e4
LT		 1928 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same
1929 format as the data returned from the in point */
5c09d144 1930 if ((ret = usb_control_msg(port->serial->dev,
1da177e4 1931 usb_rcvctrlpipe(port->serial->dev, 0),
5c09d144 1932 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1da177e4 1933 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
5c09d144 1934 0, priv->interface,
1da177e4
LT		 1935 buf, 2, WDR_TIMEOUT)) < 0 ) {
1936 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
1937 ret);
1938 return(ret);
1939 }
1940 break;
1941 default:
1942 return -EFAULT;
1943 break;
1944 }
5c09d144 1945
1da177e4
LT		 1946 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
1947 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
1948 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) |
1949 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) |
5c09d144 1950 priv->last_dtr_rts;
1da177e4
LT		 1951}
1952
1953static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear)
1954{
1da177e4 1955 dbg("%s TIOCMSET", __FUNCTION__);
74ede0ff 1956 return update_mctrl(port, set, clear);
1da177e4
LT		 1957}
1958
1959
1960static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
1961{
1962 struct ftdi_private *priv = usb_get_serial_port_data(port);
1963
1da177e4
LT		 1964 dbg("%s cmd 0x%04x", __FUNCTION__, cmd);
1965
1966 /* Based on code from acm.c and others */
1967 switch (cmd) {
1968
1da177e4
LT		 1969 case TIOCGSERIAL: /* gets serial port data */
1970 return get_serial_info(port, (struct serial_struct __user *) arg);
1971
1972 case TIOCSSERIAL: /* sets serial port data */
1973 return set_serial_info(port, (struct serial_struct __user *) arg);
1974
1975 /*
1976 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1977 * - mask passed in arg for lines of interest
1978 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1979 * Caller should use TIOCGICOUNT to see which one it was.
1980 *
1981 * This code is borrowed from linux/drivers/char/serial.c
1982 */
1983 case TIOCMIWAIT:
1984 while (priv != NULL) {
1985 interruptible_sleep_on(&priv->delta_msr_wait);
1986 /* see if a signal did it */
1987 if (signal_pending(current))
1988 return -ERESTARTSYS;
1989 else {
1990 char diff = priv->diff_status;
1991
1992 if (diff == 0) {
1993 return -EIO; /* no change => error */
1994 }
1995
1996 /* Consume all events */
1997 priv->diff_status = 0;
1998
1999 /* Return 0 if caller wanted to know about these bits */
2000 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
2001 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
2002 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) ||
2003 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) {
2004 return 0;
2005 }
2006 /*
2007 * Otherwise caller can't care less about what happened,
2008 * and so we continue to wait for more events.
2009 */
2010 }
2011 }
2012 return(0);
2013 break;
2014 default:
2015 break;
5c09d144 2016
1da177e4
LT		 2017 }
2018
2019
5c09d144 2020 /* This is not necessarily an error - turns out the higher layers will do
1da177e4
LT		 2021 * some ioctls itself (see comment above)
2022 */
2023 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd);
2024
2025 return(-ENOIOCTLCMD);
2026} /* ftdi_ioctl */
2027
2028
2029static void ftdi_throttle (struct usb_serial_port *port)
2030{
2031 struct ftdi_private *priv = usb_get_serial_port_data(port);
2032 unsigned long flags;
2033
2034 dbg("%s - port %d", __FUNCTION__, port->number);
2035
2036 spin_lock_irqsave(&priv->rx_lock, flags);
2037 priv->rx_flags |= THROTTLED;
2038 spin_unlock_irqrestore(&priv->rx_lock, flags);
2039}
2040
2041
2042static void ftdi_unthrottle (struct usb_serial_port *port)
2043{
2044 struct ftdi_private *priv = usb_get_serial_port_data(port);
2045 int actually_throttled;
2046 unsigned long flags;
2047
2048 dbg("%s - port %d", __FUNCTION__, port->number);
2049
2050 spin_lock_irqsave(&priv->rx_lock, flags);
2051 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
2052 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
2053 spin_unlock_irqrestore(&priv->rx_lock, flags);
2054
2055 if (actually_throttled)
c4028958 2056 schedule_delayed_work(&priv->rx_work, 0);
1da177e4
LT		 2057}
2058
2059static int __init ftdi_init (void)
2060{
2061 int retval;
2062
2063 dbg("%s", __FUNCTION__);
fdcb0a0f
IA		 2064 if (vendor > 0 && product > 0) {
2065 /* Add user specified VID/PID to reserved element of table. */
2066 int i;
2067 for (i = 0; id_table_combined[i].idVendor; i++)
2068 ;
2069 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
2070 id_table_combined[i].idVendor = vendor;
2071 id_table_combined[i].idProduct = product;
2072 }
8f977e42 2073 retval = usb_serial_register(&ftdi_sio_device);
1da177e4 2074 if (retval)
8f977e42 2075 goto failed_sio_register;
1da177e4 2076 retval = usb_register(&ftdi_driver);
5c09d144 2077 if (retval)
1da177e4
LT		 2078 goto failed_usb_register;
2079
2080 info(DRIVER_VERSION ":" DRIVER_DESC);
2081 return 0;
2082failed_usb_register:
8f977e42
IA		 2083 usb_serial_deregister(&ftdi_sio_device);
2084failed_sio_register:
1da177e4
LT		 2085 return retval;
2086}
2087
2088
2089static void __exit ftdi_exit (void)
2090{
2091
2092 dbg("%s", __FUNCTION__);
2093
2094 usb_deregister (&ftdi_driver);
8f977e42 2095 usb_serial_deregister (&ftdi_sio_device);
1da177e4
LT		 2096
2097}
2098
2099
2100module_init(ftdi_init);
2101module_exit(ftdi_exit);
2102
2103MODULE_AUTHOR( DRIVER_AUTHOR );
2104MODULE_DESCRIPTION( DRIVER_DESC );
2105MODULE_LICENSE("GPL");
2106
2107module_param(debug, bool, S_IRUGO | S_IWUSR);
2108MODULE_PARM_DESC(debug, "Debug enabled or not");
fdcb0a0f
IA		 2109module_param(vendor, ushort, 0);
2110MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
2111 __MODULE_STRING(FTDI_VID)")");
2112module_param(product, ushort, 0);
2113MODULE_PARM_DESC(vendor, "User specified product ID");
1da177e4 2114
Clone of davem's net-next-2.6 tree