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FRV: Change the timerfd syscalls to be the same as i386
[deliverable/linux.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);
0ffbbe25
ON		 95static void ftdi_USB_UIRT_setup (struct ftdi_private *priv);
96static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv);
8f977e42 97
20734345
HW		 98static struct ftdi_sio_quirk ftdi_jtag_quirk = {
99 .probe = ftdi_jtag_probe,
fa91d43b
TL		 100};
101
8f977e42 102static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
0ffbbe25 103 .port_probe = ftdi_USB_UIRT_setup,
8f977e42
IA		 104};
105
106static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = {
0ffbbe25 107 .port_probe = ftdi_HE_TIRA1_setup,
1da177e4
LT		 108};
109
110/*
111 * The 8U232AM has the same API as the sio except for:
112 * - it can support MUCH higher baudrates; up to:
113 * o 921600 for RS232 and 2000000 for RS422/485 at 48MHz
114 * o 230400 at 12MHz
115 * so .. 8U232AM's baudrate setting codes are different
116 * - it has a two byte status code.
117 * - it returns characters every 16ms (the FTDI does it every 40ms)
118 *
119 * the bcdDevice value is used to differentiate FT232BM and FT245BM from
120 * the earlier FT8U232AM and FT8U232BM. For now, include all known VID/PID
121 * combinations in both tables.
8f977e42
IA		 122 * FIXME: perhaps bcdDevice can also identify 12MHz FT8U232AM devices,
123 * but I don't know if those ever went into mass production. [Ian Abbott]
1da177e4
LT		 124 */
125
126
1da177e4
LT		 127
128static struct usb_device_id id_table_combined [] = {
2011e924
JD		 129 { USB_DEVICE(FTDI_VID, FTDI_AMC232_PID) },
130 { USB_DEVICE(FTDI_VID, FTDI_CANUSB_PID) },
72a9f958 131 { USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) },
1da177e4 132 { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) },
69737dfa 133 { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) },
d099321b 134 { USB_DEVICE(FTDI_VID, FTDI_IPLUS2_PID) },
fad14a0d 135 { USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) },
1da177e4
LT		 136 { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
137 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
138 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
d8b21606 139 { USB_DEVICE(FTDI_VID, FTDI_232RL_PID) },
1da177e4 140 { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
c0f8d561 141 { USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
1da177e4 142 { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
2adb80e9 143 { USB_DEVICE(FTDI_VID, FTDI_OPENDCC_PID) },
1da177e4
LT		 144 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
145 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
146 { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
147 { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
148 { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
149 { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
150 { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
151 { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
152 { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
153 { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
154 { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
155 { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
156 { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
8f977e42
IA		 157 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
158 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
159 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
160 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
161 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
162 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
163 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
164 { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
1da177e4 165 { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
274a4bbc 166 { USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
868e440d 167 { USB_DEVICE(FTDI_VID, FTDI_USBX_707_PID) },
1da177e4
LT		 168 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
169 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
170 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
171 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
a1484827 172 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) },
1da177e4
LT		 173 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
174 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
175 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
176 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
177 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
178 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
179 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
180 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
181 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
182 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
183 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
184 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
185 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
186 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
187 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
188 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
189 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
190 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
191 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
192 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
193 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
194 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
195 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
196 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
197 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
198 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
199 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
200 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
201 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
202 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
203 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
204 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
205 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
206 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
207 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
208 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
209 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
210 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
211 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
212 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
213 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
214 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
215 { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
216 { USB_DEVICE(OCT_VID, OCT_US101_PID) },
8f977e42
IA		 217 { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
218 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
219 { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
220 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
1da177e4
LT		 221 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
222 { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
223 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
224 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
8f977e42
IA		 225 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
226 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
227 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
228 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
229 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
230 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
231 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
232 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
233 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
234 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
235 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
236 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
237 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
238 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
239 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
240 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
1da177e4 241 { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) },
47900743 242 { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
e6ac4a40
IA		 243 { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
244 { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
207c47e1 245 { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
bde62185 246 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
4eaf60e0
TS		 247 { USB_DEVICE(FTDI_VID, FTDI_IBS_US485_PID) },
248 { USB_DEVICE(FTDI_VID, FTDI_IBS_PICPRO_PID) },
249 { USB_DEVICE(FTDI_VID, FTDI_IBS_PCMCIA_PID) },
250 { USB_DEVICE(FTDI_VID, FTDI_IBS_PK1_PID) },
251 { USB_DEVICE(FTDI_VID, FTDI_IBS_RS232MON_PID) },
252 { USB_DEVICE(FTDI_VID, FTDI_IBS_APP70_PID) },
253 { USB_DEVICE(FTDI_VID, FTDI_IBS_PEDO_PID) },
254 { USB_DEVICE(FTDI_VID, FTDI_IBS_PROD_PID) },
e6ac4a40 255 /*
42f8aa94
PS		 256 * Due to many user requests for multiple ELV devices we enable
257 * them by default.
e6ac4a40 258 */
42f8aa94
PS		 259 { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) },
260 { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) },
261 { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) },
262 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) },
263 { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) },
264 { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) },
265 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) },
266 { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) },
267 { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) },
268 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) },
269 { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) },
270 { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) },
271 { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) },
272 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) },
273 { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) },
274 { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) },
275 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) },
276 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) },
277 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) },
5c09d144
DB		 278 { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
279 { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
280 { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
281 { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
282 { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
283 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
284 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
ec434e9b 285 { USB_DEVICE(FTDI_VID, FTDI_CCSMACHX_2_PID) },
1da177e4
LT		 286 { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
287 { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
288 { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
289 { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
e6ac4a40 290 { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
1da177e4 291 { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) },
ef31fec0 292 { USB_DEVICE(TTI_VID, TTI_QL355P_PID) },
6f92872c 293 { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
1da177e4
LT		 294 { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
295 { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
296 { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
297 { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
6f92872c
IA		 298 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
299 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
e6ac4a40
IA		 300 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
301 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
302 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
303 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
304 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
305 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
306 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
307 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
6f92872c 308 { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
8f977e42 309 { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
34d1a8aa
IA		 310 { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) },
311 { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) },
9b1513d9
IA		 312 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
313 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
34d1a8aa
IA		 314 { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) },
315 { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) },
316 { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) },
317 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) },
740a4282
IA		 318 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
319 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
9b1513d9 320 { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
c1f8ea7d
SH		 321 { USB_DEVICE(EVOLUTION_VID, EVO_HYBRID_PID) },
322 { USB_DEVICE(EVOLUTION_VID, EVO_RCM4_PID) },
c9c7746d
RS		 323 { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
324 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
09c280a2 325 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
c9c7746d 326 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
09c280a2 327 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
34910434 328 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16IC_PID) },
b4723ae3
IA		 329 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
330 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
effac8be 331 { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
641adaae 332 { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
7e1c0b86 333 { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) },
a94b52ac
IA		 334 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
335 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
ce40d290 336 { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
cdd3b156 337 { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
7e0258fd 338 { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
bf58fbd5 339 { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
62a13db3 340 { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
20a0f47e 341 { USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
eb79b4fd 342 { USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
48437486 343 { USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
e1979fef 344 { USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
eaede2cb 345 { USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
9978f9e1
IA		 346 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) },
347 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) },
348 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) },
40c36092 349 { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) },
822c7ef4 350 { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) },
762e92fa 351 { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) },
d7fde2d6 352 { USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) },
4bb0ef19 353 { USB_DEVICE(FTDI_VID, FTDI_ELSTER_UNICOM_PID) },
fa91d43b 354 { USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID),
20734345
HW		 355 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
356 { USB_DEVICE(FIC_VID, FIC_NEO1973_DEBUG_PID),
357 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
358 { USB_DEVICE(FTDI_VID, FTDI_OOCDLINK_PID),
359 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
fdcb0a0f
IA		 360 { }, /* Optional parameter entry */
361 { } /* Terminating entry */
1da177e4
LT		 362};
363
364MODULE_DEVICE_TABLE (usb, id_table_combined);
365
366static struct usb_driver ftdi_driver = {
367 .name = "ftdi_sio",
368 .probe = usb_serial_probe,
369 .disconnect = usb_serial_disconnect,
370 .id_table = id_table_combined,
5c09d144 371 .no_dynamic_id = 1,
1da177e4
LT		 372};
373
4c4c9432 374static const char *ftdi_chip_name[] = {
1da177e4
LT		 375 [SIO] = "SIO", /* the serial part of FT8U100AX */
376 [FT8U232AM] = "FT8U232AM",
377 [FT232BM] = "FT232BM",
378 [FT2232C] = "FT2232C",
d8b21606 379 [FT232RL] = "FT232RL",
1da177e4
LT		 380};
381
382
383/* Constants for read urb and write urb */
384#define BUFSZ 512
385#define PKTSZ 64
386
387/* rx_flags */
388#define THROTTLED 0x01
389#define ACTUALLY_THROTTLED 0x02
390
1da177e4
LT		 391/* Used for TIOCMIWAIT */
392#define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
393#define FTDI_STATUS_B1_MASK (FTDI_RS_BI)
394/* End TIOCMIWAIT */
395
396#define FTDI_IMPL_ASYNC_FLAGS = ( ASYNC_SPD_HI | ASYNC_SPD_VHI \
397 ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP )
398
399/* function prototypes for a FTDI serial converter */
8f977e42 400static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id);
1da177e4 401static void ftdi_shutdown (struct usb_serial *serial);
12bdbe03
JR		 402static int ftdi_sio_port_probe (struct usb_serial_port *port);
403static int ftdi_sio_port_remove (struct usb_serial_port *port);
1da177e4
LT		 404static int ftdi_open (struct usb_serial_port *port, struct file *filp);
405static void ftdi_close (struct usb_serial_port *port, struct file *filp);
406static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count);
407static int ftdi_write_room (struct usb_serial_port *port);
408static int ftdi_chars_in_buffer (struct usb_serial_port *port);
7d12e780
DH		 409static void ftdi_write_bulk_callback (struct urb *urb);
410static void ftdi_read_bulk_callback (struct urb *urb);
c4028958 411static void ftdi_process_read (struct work_struct *work);
606d099c 412static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios * old);
1da177e4
LT		 413static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file);
414static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear);
415static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
416static void ftdi_break_ctl (struct usb_serial_port *port, int break_state );
417static void ftdi_throttle (struct usb_serial_port *port);
418static void ftdi_unthrottle (struct usb_serial_port *port);
419
420static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base);
421static unsigned short int ftdi_232am_baud_to_divisor (int baud);
422static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base);
423static __u32 ftdi_232bm_baud_to_divisor (int baud);
424
ea65370d 425static struct usb_serial_driver ftdi_sio_device = {
18fcac35
GKH		 426 .driver = {
427 .owner = THIS_MODULE,
269bda1c 428 .name = "ftdi_sio",
18fcac35 429 },
269bda1c 430 .description = "FTDI USB Serial Device",
d9b1b787 431 .usb_driver = &ftdi_driver ,
8f977e42 432 .id_table = id_table_combined,
1da177e4
LT		 433 .num_interrupt_in = 0,
434 .num_bulk_in = 1,
435 .num_bulk_out = 1,
436 .num_ports = 1,
8f977e42 437 .probe = ftdi_sio_probe,
12bdbe03
JR		 438 .port_probe = ftdi_sio_port_probe,
439 .port_remove = ftdi_sio_port_remove,
1da177e4
LT		 440 .open = ftdi_open,
441 .close = ftdi_close,
442 .throttle = ftdi_throttle,
443 .unthrottle = ftdi_unthrottle,
444 .write = ftdi_write,
445 .write_room = ftdi_write_room,
446 .chars_in_buffer = ftdi_chars_in_buffer,
447 .read_bulk_callback = ftdi_read_bulk_callback,
448 .write_bulk_callback = ftdi_write_bulk_callback,
449 .tiocmget = ftdi_tiocmget,
450 .tiocmset = ftdi_tiocmset,
451 .ioctl = ftdi_ioctl,
452 .set_termios = ftdi_set_termios,
453 .break_ctl = ftdi_break_ctl,
1da177e4
LT		 454 .shutdown = ftdi_shutdown,
455};
456
1da177e4
LT		 457
458#define WDR_TIMEOUT 5000 /* default urb timeout */
279e1545 459#define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
1da177e4
LT		 460
461/* High and low are for DTR, RTS etc etc */
462#define HIGH 1
463#define LOW 0
464
22465400
IA		 465/* number of outstanding urbs to prevent userspace DoS from happening */
466#define URB_UPPER_LIMIT 42
467
1da177e4
LT		 468/*
469 * ***************************************************************************
fa91d43b 470 * Utility functions
1da177e4
LT		 471 * ***************************************************************************
472 */
473
474static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
475{
476 unsigned short int divisor;
477 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
478 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1
479 divisor = divisor3 >> 3;
480 divisor3 &= 0x7;
481 if (divisor3 == 1) divisor |= 0xc000; else // 0.125
482 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5
483 if (divisor3 != 0) divisor |= 0x8000; // 0.25
484 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */
485 return divisor;
486}
487
488static unsigned short int ftdi_232am_baud_to_divisor(int baud)
489{
490 return(ftdi_232am_baud_base_to_divisor(baud, 48000000));
491}
492
493static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
494{
495 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
496 __u32 divisor;
497 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
498 divisor = divisor3 >> 3;
499 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
500 /* Deal with special cases for highest baud rates. */
501 if (divisor == 1) divisor = 0; else // 1.0
502 if (divisor == 0x4001) divisor = 1; // 1.5
503 return divisor;
504}
505
506static __u32 ftdi_232bm_baud_to_divisor(int baud)
507{
508 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000));
509}
510
74ede0ff
IA		 511#define set_mctrl(port, set) update_mctrl((port), (set), 0)
512#define clear_mctrl(port, clear) update_mctrl((port), 0, (clear))
513
514static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear)
1da177e4
LT		 515{
516 struct ftdi_private *priv = usb_get_serial_port_data(port);
517 char *buf;
74ede0ff 518 unsigned urb_value;
1da177e4 519 int rv;
1da177e4 520
74ede0ff
IA		 521 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
522 dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__);
523 return 0; /* no change */
524 }
1da177e4 525
1da177e4 526 buf = kmalloc(1, GFP_NOIO);
74ede0ff 527 if (!buf) {
1da177e4 528 return -ENOMEM;
1da177e4 529 }
74ede0ff
IA		 530
531 clear &= ~set; /* 'set' takes precedence over 'clear' */
532 urb_value = 0;
533 if (clear & TIOCM_DTR)
534 urb_value |= FTDI_SIO_SET_DTR_LOW;
535 if (clear & TIOCM_RTS)
536 urb_value |= FTDI_SIO_SET_RTS_LOW;
537 if (set & TIOCM_DTR)
538 urb_value |= FTDI_SIO_SET_DTR_HIGH;
539 if (set & TIOCM_RTS)
540 urb_value |= FTDI_SIO_SET_RTS_HIGH;
1da177e4
LT		 541 rv = usb_control_msg(port->serial->dev,
542 usb_sndctrlpipe(port->serial->dev, 0),
5c09d144 543 FTDI_SIO_SET_MODEM_CTRL_REQUEST,
1da177e4 544 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
74ede0ff 545 urb_value, priv->interface,
1da177e4
LT		 546 buf, 0, WDR_TIMEOUT);
547
548 kfree(buf);
74ede0ff
IA		 549 if (rv < 0) {
550 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
551 __FUNCTION__,
552 (set & TIOCM_DTR) ? "HIGH" :
553 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
554 (set & TIOCM_RTS) ? "HIGH" :
555 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
556 } else {
557 dbg("%s - DTR %s, RTS %s", __FUNCTION__,
558 (set & TIOCM_DTR) ? "HIGH" :
559 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
560 (set & TIOCM_RTS) ? "HIGH" :
561 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
562 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
563 }
1da177e4
LT		 564 return rv;
565}
566
567
568static __u32 get_ftdi_divisor(struct usb_serial_port * port);
569
570
571static int change_speed(struct usb_serial_port *port)
572{
573 struct ftdi_private *priv = usb_get_serial_port_data(port);
574 char *buf;
575 __u16 urb_value;
576 __u16 urb_index;
577 __u32 urb_index_value;
578 int rv;
579
580 buf = kmalloc(1, GFP_NOIO);
581 if (!buf)
582 return -ENOMEM;
583
584 urb_index_value = get_ftdi_divisor(port);
585 urb_value = (__u16)urb_index_value;
586 urb_index = (__u16)(urb_index_value >> 16);
587 if (priv->interface) { /* FT2232C */
588 urb_index = (__u16)((urb_index << 8) | priv->interface);
589 }
5c09d144 590
1da177e4
LT		 591 rv = usb_control_msg(port->serial->dev,
592 usb_sndctrlpipe(port->serial->dev, 0),
593 FTDI_SIO_SET_BAUDRATE_REQUEST,
594 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
595 urb_value, urb_index,
279e1545 596 buf, 0, WDR_SHORT_TIMEOUT);
1da177e4
LT		 597
598 kfree(buf);
599 return rv;
600}
601
602
603static __u32 get_ftdi_divisor(struct usb_serial_port * port)
604{ /* get_ftdi_divisor */
605 struct ftdi_private *priv = usb_get_serial_port_data(port);
606 __u32 div_value = 0;
607 int div_okay = 1;
608 int baud;
609
610 /*
611 * The logic involved in setting the baudrate can be cleanly split in 3 steps.
612 * Obtaining the actual baud rate is a little tricky since unix traditionally
613 * somehow ignored the possibility to set non-standard baud rates.
614 * 1. Standard baud rates are set in tty->termios->c_cflag
615 * 2. If these are not enough, you can set any speed using alt_speed as follows:
616 * - set tty->termios->c_cflag speed to B38400
617 * - set your real speed in tty->alt_speed; it gets ignored when
618 * alt_speed==0, (or)
619 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
620 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just
621 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800)
622 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate
623 * 3. You can also set baud rate by setting custom divisor as follows
624 * - set tty->termios->c_cflag speed to B38400
625 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
626 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
627 * o custom_divisor set to baud_base / your_new_baudrate
628 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really
629 * spend some time and separate+move this common code to serial.c, it is
630 * replicated in nearly every serial driver you see.
631 */
632
633 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */
634
635 baud = tty_get_baud_rate(port->tty);
636 dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud);
637
638 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */
639
640 if (baud == 38400 &&
641 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
642 (priv->custom_divisor)) {
643 baud = priv->baud_base / priv->custom_divisor;
644 dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud);
645 }
646
647 /* 3. Convert baudrate to device-specific divisor */
648
5c09d144 649 if (!baud) baud = 9600;
1da177e4
LT		 650 switch(priv->chip_type) {
651 case SIO: /* SIO chip */
652 switch(baud) {
653 case 300: div_value = ftdi_sio_b300; break;
654 case 600: div_value = ftdi_sio_b600; break;
655 case 1200: div_value = ftdi_sio_b1200; break;
656 case 2400: div_value = ftdi_sio_b2400; break;
657 case 4800: div_value = ftdi_sio_b4800; break;
658 case 9600: div_value = ftdi_sio_b9600; break;
659 case 19200: div_value = ftdi_sio_b19200; break;
660 case 38400: div_value = ftdi_sio_b38400; break;
661 case 57600: div_value = ftdi_sio_b57600; break;
662 case 115200: div_value = ftdi_sio_b115200; break;
663 } /* baud */
664 if (div_value == 0) {
5c09d144 665 dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud);
1da177e4 666 div_value = ftdi_sio_b9600;
bd5e47cc 667 baud = 9600;
1da177e4
LT		 668 div_okay = 0;
669 }
670 break;
671 case FT8U232AM: /* 8U232AM chip */
672 if (baud <= 3000000) {
673 div_value = ftdi_232am_baud_to_divisor(baud);
674 } else {
675 dbg("%s - Baud rate too high!", __FUNCTION__);
bd5e47cc 676 baud = 9600;
1da177e4
LT		 677 div_value = ftdi_232am_baud_to_divisor(9600);
678 div_okay = 0;
679 }
680 break;
681 case FT232BM: /* FT232BM chip */
682 case FT2232C: /* FT2232C chip */
3b009c63 683 case FT232RL:
1da177e4
LT		 684 if (baud <= 3000000) {
685 div_value = ftdi_232bm_baud_to_divisor(baud);
686 } else {
687 dbg("%s - Baud rate too high!", __FUNCTION__);
688 div_value = ftdi_232bm_baud_to_divisor(9600);
689 div_okay = 0;
669a6db1 690 baud = 9600;
1da177e4
LT		 691 }
692 break;
693 } /* priv->chip_type */
694
695 if (div_okay) {
696 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
697 __FUNCTION__, baud, (unsigned long)div_value,
698 ftdi_chip_name[priv->chip_type]);
699 }
700
669a6db1 701 tty_encode_baud_rate(port->tty, baud, baud);
1da177e4
LT		 702 return(div_value);
703}
704
705
706static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo)
707{
708 struct ftdi_private *priv = usb_get_serial_port_data(port);
709 struct serial_struct tmp;
710
711 if (!retinfo)
712 return -EFAULT;
713 memset(&tmp, 0, sizeof(tmp));
714 tmp.flags = priv->flags;
715 tmp.baud_base = priv->baud_base;
716 tmp.custom_divisor = priv->custom_divisor;
717 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
718 return -EFAULT;
719 return 0;
720} /* get_serial_info */
721
722
723static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo)
724{ /* set_serial_info */
725 struct ftdi_private *priv = usb_get_serial_port_data(port);
726 struct serial_struct new_serial;
727 struct ftdi_private old_priv;
728
729 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
730 return -EFAULT;
731 old_priv = * priv;
732
733 /* Do error checking and permission checking */
734
735 if (!capable(CAP_SYS_ADMIN)) {
736 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
737 (priv->flags & ~ASYNC_USR_MASK)))
738 return -EPERM;
739 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
740 (new_serial.flags & ASYNC_USR_MASK));
741 priv->custom_divisor = new_serial.custom_divisor;
742 goto check_and_exit;
743 }
744
745 if ((new_serial.baud_base != priv->baud_base) &&
746 (new_serial.baud_base < 9600))
747 return -EINVAL;
748
749 /* Make the changes - these are privileged changes! */
750
751 priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
5c09d144 752 (new_serial.flags & ASYNC_FLAGS));
1da177e4
LT		 753 priv->custom_divisor = new_serial.custom_divisor;
754
755 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
756
757check_and_exit:
758 if ((old_priv.flags & ASYNC_SPD_MASK) !=
759 (priv->flags & ASYNC_SPD_MASK)) {
760 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
761 port->tty->alt_speed = 57600;
762 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
763 port->tty->alt_speed = 115200;
764 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
765 port->tty->alt_speed = 230400;
766 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
767 port->tty->alt_speed = 460800;
768 else
769 port->tty->alt_speed = 0;
770 }
771 if (((old_priv.flags & ASYNC_SPD_MASK) !=
772 (priv->flags & ASYNC_SPD_MASK)) ||
773 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
774 (old_priv.custom_divisor != priv->custom_divisor))) {
775 change_speed(port);
776 }
5c09d144 777
1da177e4
LT		 778 return (0);
779
780} /* set_serial_info */
781
782
8f977e42
IA		 783/* Determine type of FTDI chip based on USB config and descriptor. */
784static void ftdi_determine_type(struct usb_serial_port *port)
785{
786 struct ftdi_private *priv = usb_get_serial_port_data(port);
787 struct usb_serial *serial = port->serial;
788 struct usb_device *udev = serial->dev;
789 unsigned version;
790 unsigned interfaces;
791
792 /* Assume it is not the original SIO device for now. */
f5e09b7c 793 priv->baud_base = 48000000 / 2;
8f977e42
IA		 794 priv->write_offset = 0;
795
796 version = le16_to_cpu(udev->descriptor.bcdDevice);
797 interfaces = udev->actconfig->desc.bNumInterfaces;
798 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__,
799 version, interfaces);
800 if (interfaces > 1) {
801 int inter;
802
803 /* Multiple interfaces. Assume FT2232C. */
804 priv->chip_type = FT2232C;
805 /* Determine interface code. */
806 inter = serial->interface->altsetting->desc.bInterfaceNumber;
807 if (inter == 0) {
808 priv->interface = PIT_SIOA;
809 } else {
810 priv->interface = PIT_SIOB;
811 }
812 /* BM-type devices have a bug where bcdDevice gets set
813 * to 0x200 when iSerialNumber is 0. */
814 if (version < 0x500) {
815 dbg("%s: something fishy - bcdDevice too low for multi-interface device",
816 __FUNCTION__);
817 }
818 } else if (version < 0x200) {
819 /* Old device. Assume its the original SIO. */
820 priv->chip_type = SIO;
821 priv->baud_base = 12000000 / 16;
822 priv->write_offset = 1;
823 } else if (version < 0x400) {
824 /* Assume its an FT8U232AM (or FT8U245AM) */
825 /* (It might be a BM because of the iSerialNumber bug,
826 * but it will still work as an AM device.) */
827 priv->chip_type = FT8U232AM;
3b009c63 828 } else if (version < 0x600) {
8f977e42
IA		 829 /* Assume its an FT232BM (or FT245BM) */
830 priv->chip_type = FT232BM;
3b009c63
DB		 831 } else {
832 /* Assume its an FT232R */
833 priv->chip_type = FT232RL;
8f977e42
IA		 834 }
835 info("Detected %s", ftdi_chip_name[priv->chip_type]);
836}
837
838
1da177e4
LT		 839/*
840 * ***************************************************************************
841 * Sysfs Attribute
842 * ***************************************************************************
843 */
844
060b8845 845static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 846{
847 struct usb_serial_port *port = to_usb_serial_port(dev);
848 struct ftdi_private *priv = usb_get_serial_port_data(port);
12bdbe03 849 struct usb_device *udev = port->serial->dev;
1da177e4
LT		 850 unsigned short latency = 0;
851 int rv = 0;
5c09d144 852
5c09d144 853
1da177e4 854 dbg("%s",__FUNCTION__);
5c09d144 855
1da177e4
LT		 856 rv = usb_control_msg(udev,
857 usb_rcvctrlpipe(udev, 0),
858 FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
859 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
5c09d144 860 0, priv->interface,
1da177e4 861 (char*) &latency, 1, WDR_TIMEOUT);
5c09d144 862
1da177e4 863 if (rv < 0) {
898eb71c 864 dev_err(dev, "Unable to read latency timer: %i\n", rv);
1da177e4
LT		 865 return -EIO;
866 }
867 return sprintf(buf, "%i\n", latency);
868}
869
870/* Write a new value of the latency timer, in units of milliseconds. */
060b8845 871static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf,
1da177e4
LT		 872 size_t count)
873{
874 struct usb_serial_port *port = to_usb_serial_port(dev);
875 struct ftdi_private *priv = usb_get_serial_port_data(port);
12bdbe03 876 struct usb_device *udev = port->serial->dev;
1da177e4
LT		 877 char buf[1];
878 int v = simple_strtoul(valbuf, NULL, 10);
879 int rv = 0;
5c09d144 880
1da177e4 881 dbg("%s: setting latency timer = %i", __FUNCTION__, v);
5c09d144 882
1da177e4
LT		 883 rv = usb_control_msg(udev,
884 usb_sndctrlpipe(udev, 0),
885 FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
886 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
5c09d144 887 v, priv->interface,
1da177e4 888 buf, 0, WDR_TIMEOUT);
5c09d144 889
1da177e4 890 if (rv < 0) {
898eb71c 891 dev_err(dev, "Unable to write latency timer: %i\n", rv);
1da177e4
LT		 892 return -EIO;
893 }
5c09d144 894
1da177e4
LT		 895 return count;
896}
897
898/* Write an event character directly to the FTDI register. The ASCII
899 value is in the low 8 bits, with the enable bit in the 9th bit. */
060b8845 900static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf,
1da177e4
LT		 901 size_t count)
902{
903 struct usb_serial_port *port = to_usb_serial_port(dev);
904 struct ftdi_private *priv = usb_get_serial_port_data(port);
12bdbe03 905 struct usb_device *udev = port->serial->dev;
1da177e4
LT		 906 char buf[1];
907 int v = simple_strtoul(valbuf, NULL, 10);
908 int rv = 0;
5c09d144 909
1da177e4 910 dbg("%s: setting event char = %i", __FUNCTION__, v);
5c09d144 911
1da177e4
LT		 912 rv = usb_control_msg(udev,
913 usb_sndctrlpipe(udev, 0),
914 FTDI_SIO_SET_EVENT_CHAR_REQUEST,
915 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE,
5c09d144 916 v, priv->interface,
1da177e4 917 buf, 0, WDR_TIMEOUT);
5c09d144 918
1da177e4
LT		 919 if (rv < 0) {
920 dbg("Unable to write event character: %i", rv);
921 return -EIO;
922 }
5c09d144 923
1da177e4
LT		 924 return count;
925}
926
927static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer);
928static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);
929
12bdbe03 930static int create_sysfs_attrs(struct usb_serial_port *port)
13f4db9e 931{
12bdbe03 932 struct ftdi_private *priv = usb_get_serial_port_data(port);
13f4db9e 933 int retval = 0;
1da177e4
LT		 934
935 dbg("%s",__FUNCTION__);
13f4db9e 936
1da177e4
LT		 937 /* XXX I've no idea if the original SIO supports the event_char
938 * sysfs parameter, so I'm playing it safe. */
939 if (priv->chip_type != SIO) {
940 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]);
12bdbe03 941 retval = device_create_file(&port->dev, &dev_attr_event_char);
13f4db9e 942 if ((!retval) &&
97cd49eb
SM		 943 (priv->chip_type == FT232BM ||
944 priv->chip_type == FT2232C ||
945 priv->chip_type == FT232RL)) {
12bdbe03 946 retval = device_create_file(&port->dev,
13f4db9e 947 &dev_attr_latency_timer);
1da177e4
LT		 948 }
949 }
13f4db9e 950 return retval;
1da177e4
LT		 951}
952
12bdbe03 953static void remove_sysfs_attrs(struct usb_serial_port *port)
1da177e4 954{
12bdbe03 955 struct ftdi_private *priv = usb_get_serial_port_data(port);
1da177e4 956
5c09d144 957 dbg("%s",__FUNCTION__);
1da177e4 958
1da177e4
LT		 959 /* XXX see create_sysfs_attrs */
960 if (priv->chip_type != SIO) {
12bdbe03 961 device_remove_file(&port->dev, &dev_attr_event_char);
ed6e5282
AB		 962 if (priv->chip_type == FT232BM ||
963 priv->chip_type == FT2232C ||
964 priv->chip_type == FT232RL) {
12bdbe03 965 device_remove_file(&port->dev, &dev_attr_latency_timer);
1da177e4
LT		 966 }
967 }
5c09d144 968
1da177e4
LT		 969}
970
971/*
972 * ***************************************************************************
973 * FTDI driver specific functions
974 * ***************************************************************************
975 */
976
8f977e42
IA		 977/* Probe function to check for special devices */
978static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id)
979{
fa91d43b
TL		 980 struct ftdi_sio_quirk *quirk = (struct ftdi_sio_quirk *)id->driver_info;
981
982 if (quirk && quirk->probe) {
983 int ret = quirk->probe(serial);
984 if (ret != 0)
985 return ret;
986 }
987
8f977e42
IA		 988 usb_set_serial_data(serial, (void *)id->driver_info);
989
fa91d43b 990 return 0;
8f977e42
IA		 991}
992
12bdbe03 993static int ftdi_sio_port_probe(struct usb_serial_port *port)
1da177e4 994{
1da177e4 995 struct ftdi_private *priv;
0ffbbe25
ON		 996 struct ftdi_sio_quirk *quirk = usb_get_serial_data(port->serial);
997
13f4db9e 998
1da177e4
LT		 999 dbg("%s",__FUNCTION__);
1000
80b6ca48 1001 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL);
1da177e4
LT		 1002 if (!priv){
1003 err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private));
1004 return -ENOMEM;
1005 }
1da177e4
LT		 1006
1007 spin_lock_init(&priv->rx_lock);
22465400 1008 spin_lock_init(&priv->tx_lock);
1da177e4
LT		 1009 init_waitqueue_head(&priv->delta_msr_wait);
1010 /* This will push the characters through immediately rather
1011 than queue a task to deliver them */
1012 priv->flags = ASYNC_LOW_LATENCY;
1013
0ffbbe25
ON		 1014 if (quirk && quirk->port_probe)
1015 quirk->port_probe(priv);
1016
1da177e4 1017 /* Increase the size of read buffers */
1bc3c9e1 1018 kfree(port->bulk_in_buffer);
1da177e4
LT		 1019 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL);
1020 if (!port->bulk_in_buffer) {
1021 kfree (priv);
1022 return -ENOMEM;
1023 }
1024 if (port->read_urb) {
1025 port->read_urb->transfer_buffer = port->bulk_in_buffer;
1026 port->read_urb->transfer_buffer_length = BUFSZ;
1027 }
1028
c4028958
DH		 1029 INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read);
1030 priv->port = port;
76854cea 1031
1da177e4
LT		 1032 /* Free port's existing write urb and transfer buffer. */
1033 if (port->write_urb) {
1034 usb_free_urb (port->write_urb);
1035 port->write_urb = NULL;
1036 }
1bc3c9e1
JJ		 1037 kfree(port->bulk_out_buffer);
1038 port->bulk_out_buffer = NULL;
1da177e4 1039
12bdbe03 1040 usb_set_serial_port_data(port, priv);
1da177e4 1041
12bdbe03
JR		 1042 ftdi_determine_type (port);
1043 create_sysfs_attrs(port);
1044 return 0;
1045}
1da177e4 1046
8f977e42
IA		 1047/* Setup for the USB-UIRT device, which requires hardwired
1048 * baudrate (38400 gets mapped to 312500) */
1da177e4 1049/* Called from usbserial:serial_probe */
0ffbbe25 1050static void ftdi_USB_UIRT_setup (struct ftdi_private *priv)
8f977e42 1051{
1da177e4 1052 dbg("%s",__FUNCTION__);
1da177e4 1053
1da177e4
LT		 1054 priv->flags |= ASYNC_SPD_CUST;
1055 priv->custom_divisor = 77;
669a6db1 1056 priv->force_baud = 38400;
8f977e42 1057} /* ftdi_USB_UIRT_setup */
1da177e4 1058
8f977e42
IA		 1059/* Setup for the HE-TIRA1 device, which requires hardwired
1060 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */
0ffbbe25 1061static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv)
8f977e42 1062{
1da177e4 1063 dbg("%s",__FUNCTION__);
1da177e4 1064
1da177e4
LT		 1065 priv->flags |= ASYNC_SPD_CUST;
1066 priv->custom_divisor = 240;
669a6db1 1067 priv->force_baud = 38400;
1da177e4 1068 priv->force_rtscts = 1;
8f977e42 1069} /* ftdi_HE_TIRA1_setup */
1da177e4 1070
fa91d43b 1071/*
20734345
HW		 1072 * First port on JTAG adaptors such as Olimex arm-usb-ocd or the FIC/OpenMoko
1073 * Neo1973 Debug Board is reserved for JTAG interface and can be accessed from
1074 * userspace using openocd.
fa91d43b 1075 */
20734345 1076static int ftdi_jtag_probe(struct usb_serial *serial)
fa91d43b
TL		 1077{
1078 struct usb_device *udev = serial->dev;
1079 struct usb_interface *interface = serial->interface;
1080
1081 dbg("%s",__FUNCTION__);
1082
1083 if (interface == udev->actconfig->interface[0]) {
20734345 1084 info("Ignoring serial port reserved for JTAG");
fa91d43b
TL		 1085 return -ENODEV;
1086 }
1087
1088 return 0;
1089}
1da177e4 1090
5c09d144 1091/* ftdi_shutdown is called from usbserial:usb_serial_disconnect
1da177e4
LT		 1092 * it is called when the usb device is disconnected
1093 *
1094 * usbserial:usb_serial_disconnect
1095 * calls __serial_close for each open of the port
1096 * shutdown is called then (ie ftdi_shutdown)
1097 */
1da177e4 1098static void ftdi_shutdown (struct usb_serial *serial)
12bdbe03
JR		 1099{
1100 dbg("%s", __FUNCTION__);
1101}
5c09d144 1102
12bdbe03
JR		 1103static int ftdi_sio_port_remove(struct usb_serial_port *port)
1104{
1da177e4
LT		 1105 struct ftdi_private *priv = usb_get_serial_port_data(port);
1106
1107 dbg("%s", __FUNCTION__);
1108
12bdbe03 1109 remove_sysfs_attrs(port);
5c09d144
DB		 1110
1111 /* all open ports are closed at this point
1112 * (by usbserial.c:__serial_close, which calls ftdi_close)
1da177e4
LT		 1113 */
1114
1115 if (priv) {
1116 usb_set_serial_port_data(port, NULL);
1117 kfree(priv);
1118 }
1da177e4 1119
12bdbe03
JR		 1120 return 0;
1121}
1da177e4
LT		 1122
1123static int ftdi_open (struct usb_serial_port *port, struct file *filp)
1124{ /* ftdi_open */
1da177e4
LT		 1125 struct usb_device *dev = port->serial->dev;
1126 struct ftdi_private *priv = usb_get_serial_port_data(port);
1127 unsigned long flags;
5c09d144 1128
1da177e4
LT		 1129 int result = 0;
1130 char buf[1]; /* Needed for the usb_control_msg I think */
1131
1132 dbg("%s", __FUNCTION__);
1133
22465400
IA		 1134 spin_lock_irqsave(&priv->tx_lock, flags);
1135 priv->tx_bytes = 0;
1136 spin_unlock_irqrestore(&priv->tx_lock, flags);
1137 spin_lock_irqsave(&priv->rx_lock, flags);
1138 priv->rx_bytes = 0;
1139 spin_unlock_irqrestore(&priv->rx_lock, flags);
1140
57845bd1
GL		 1141 if (port->tty)
1142 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1da177e4
LT		 1143
1144 /* No error checking for this (will get errors later anyway) */
1145 /* See ftdi_sio.h for description of what is reset */
1146 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
5c09d144
DB		 1147 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
1148 FTDI_SIO_RESET_SIO,
1da177e4
LT		 1149 priv->interface, buf, 0, WDR_TIMEOUT);
1150
1151 /* Termios defaults are set by usb_serial_init. We don't change
1152 port->tty->termios - this would loose speed settings, etc.
1153 This is same behaviour as serial.c/rs_open() - Kuba */
1154
1155 /* ftdi_set_termios will send usb control messages */
57845bd1 1156 if (port->tty)
669a6db1 1157 ftdi_set_termios(port, port->tty->termios);
1da177e4
LT		 1158
1159 /* FIXME: Flow control might be enabled, so it should be checked -
1160 we have no control of defaults! */
1161 /* Turn on RTS and DTR since we are not flow controlling by default */
74ede0ff 1162 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1da177e4
LT		 1163
1164 /* Not throttled */
1165 spin_lock_irqsave(&priv->rx_lock, flags);
1166 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
1167 spin_unlock_irqrestore(&priv->rx_lock, flags);
1168
1169 /* Start reading from the device */
76854cea 1170 priv->rx_processed = 0;
1da177e4
LT		 1171 usb_fill_bulk_urb(port->read_urb, dev,
1172 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
1173 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1174 ftdi_read_bulk_callback, port);
1175 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
1176 if (result)
1177 err("%s - failed submitting read urb, error %d", __FUNCTION__, result);
1178
1179
1180 return result;
1181} /* ftdi_open */
1182
1183
1184
5c09d144 1185/*
1da177e4
LT		 1186 * usbserial:__serial_close only calls ftdi_close if the point is open
1187 *
1188 * This only gets called when it is the last close
5c09d144
DB		 1189 *
1190 *
1da177e4
LT		 1191 */
1192
1193static void ftdi_close (struct usb_serial_port *port, struct file *filp)
1194{ /* ftdi_close */
1195 unsigned int c_cflag = port->tty->termios->c_cflag;
1196 struct ftdi_private *priv = usb_get_serial_port_data(port);
1197 char buf[1];
1198
1199 dbg("%s", __FUNCTION__);
1200
95bef012
ON		 1201 mutex_lock(&port->serial->disc_mutex);
1202 if (c_cflag & HUPCL && !port->serial->disconnected){
1da177e4 1203 /* Disable flow control */
5c09d144 1204 if (usb_control_msg(port->serial->dev,
1da177e4
LT		 1205 usb_sndctrlpipe(port->serial->dev, 0),
1206 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1207 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1208 0, priv->interface, buf, 0,
1209 WDR_TIMEOUT) < 0) {
1210 err("error from flowcontrol urb");
5c09d144 1211 }
1da177e4 1212
74ede0ff
IA		 1213 /* drop RTS and DTR */
1214 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1da177e4 1215 } /* Note change no line if hupcl is off */
95bef012 1216 mutex_unlock(&port->serial->disc_mutex);
76854cea
IA		 1217
1218 /* cancel any scheduled reading */
1219 cancel_delayed_work(&priv->rx_work);
1220 flush_scheduled_work();
5c09d144 1221
1da177e4 1222 /* shutdown our bulk read */
794c944e 1223 usb_kill_urb(port->read_urb);
1da177e4
LT		 1224} /* ftdi_close */
1225
1226
5c09d144 1227
1da177e4
LT		 1228/* The SIO requires the first byte to have:
1229 * B0 1
1230 * B1 0
1231 * B2..7 length of message excluding byte 0
1232 *
1233 * The new devices do not require this byte
1234 */
1235static int ftdi_write (struct usb_serial_port *port,
1236 const unsigned char *buf, int count)
1237{ /* ftdi_write */
1238 struct ftdi_private *priv = usb_get_serial_port_data(port);
1239 struct urb *urb;
1240 unsigned char *buffer;
1241 int data_offset ; /* will be 1 for the SIO and 0 otherwise */
1242 int status;
1243 int transfer_size;
22465400 1244 unsigned long flags;
1da177e4
LT		 1245
1246 dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count);
1247
1248 if (count == 0) {
1249 dbg("write request of 0 bytes");
1250 return 0;
1251 }
22465400
IA		 1252 spin_lock_irqsave(&priv->tx_lock, flags);
1253 if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) {
1254 spin_unlock_irqrestore(&priv->tx_lock, flags);
1255 dbg("%s - write limit hit\n", __FUNCTION__);
1256 return 0;
1257 }
62127a58 1258 priv->tx_outstanding_urbs++;
22465400 1259 spin_unlock_irqrestore(&priv->tx_lock, flags);
5c09d144 1260
1da177e4
LT		 1261 data_offset = priv->write_offset;
1262 dbg("data_offset set to %d",data_offset);
1263
1264 /* Determine total transfer size */
1265 transfer_size = count;
1266 if (data_offset > 0) {
1267 /* Original sio needs control bytes too... */
1268 transfer_size += (data_offset *
1269 ((count + (PKTSZ - 1 - data_offset)) /
1270 (PKTSZ - data_offset)));
1271 }
1272
1273 buffer = kmalloc (transfer_size, GFP_ATOMIC);
1274 if (!buffer) {
1275 err("%s ran out of kernel memory for urb ...", __FUNCTION__);
62127a58
ON		 1276 count = -ENOMEM;
1277 goto error_no_buffer;
1da177e4
LT		 1278 }
1279
1280 urb = usb_alloc_urb(0, GFP_ATOMIC);
1281 if (!urb) {
1282 err("%s - no more free urbs", __FUNCTION__);
62127a58
ON		 1283 count = -ENOMEM;
1284 goto error_no_urb;
1da177e4
LT		 1285 }
1286
1287 /* Copy data */
1288 if (data_offset > 0) {
1289 /* Original sio requires control byte at start of each packet. */
1290 int user_pktsz = PKTSZ - data_offset;
1291 int todo = count;
1292 unsigned char *first_byte = buffer;
1293 const unsigned char *current_position = buf;
1294
1295 while (todo > 0) {
1296 if (user_pktsz > todo) {
1297 user_pktsz = todo;
1298 }
1299 /* Write the control byte at the front of the packet*/
5c09d144 1300 *first_byte = 1 | ((user_pktsz) << 2);
1da177e4
LT		 1301 /* Copy data for packet */
1302 memcpy (first_byte + data_offset,
1303 current_position, user_pktsz);
1304 first_byte += user_pktsz + data_offset;
1305 current_position += user_pktsz;
1306 todo -= user_pktsz;
1307 }
1308 } else {
1309 /* No control byte required. */
1310 /* Copy in the data to send */
1311 memcpy (buffer, buf, count);
1312 }
1313
1314 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer);
1315
1316 /* fill the buffer and send it */
5c09d144 1317 usb_fill_bulk_urb(urb, port->serial->dev,
1da177e4
LT		 1318 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
1319 buffer, transfer_size,
1320 ftdi_write_bulk_callback, port);
1321
1322 status = usb_submit_urb(urb, GFP_ATOMIC);
1323 if (status) {
1324 err("%s - failed submitting write urb, error %d", __FUNCTION__, status);
1325 count = status;
62127a58 1326 goto error;
22465400
IA		 1327 } else {
1328 spin_lock_irqsave(&priv->tx_lock, flags);
22465400
IA		 1329 priv->tx_outstanding_bytes += count;
1330 priv->tx_bytes += count;
1331 spin_unlock_irqrestore(&priv->tx_lock, flags);
1da177e4
LT		 1332 }
1333
1334 /* we are done with this urb, so let the host driver
1335 * really free it when it is finished with it */
62127a58 1336 usb_free_urb(urb);
1da177e4
LT		 1337
1338 dbg("%s write returning: %d", __FUNCTION__, count);
1339 return count;
62127a58
ON		 1340error:
1341 usb_free_urb(urb);
1342error_no_urb:
1343 kfree (buffer);
1344error_no_buffer:
1345 spin_lock_irqsave(&priv->tx_lock, flags);
1346 priv->tx_outstanding_urbs--;
1347 spin_unlock_irqrestore(&priv->tx_lock, flags);
1348 return count;
1da177e4
LT		 1349} /* ftdi_write */
1350
1351
1352/* This function may get called when the device is closed */
1353
7d12e780 1354static void ftdi_write_bulk_callback (struct urb *urb)
1da177e4 1355{
22465400 1356 unsigned long flags;
1da177e4 1357 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
22465400
IA		 1358 struct ftdi_private *priv;
1359 int data_offset; /* will be 1 for the SIO and 0 otherwise */
1360 unsigned long countback;
0fb0aa18 1361 int status = urb->status;
1da177e4
LT		 1362
1363 /* free up the transfer buffer, as usb_free_urb() does not do this */
1364 kfree (urb->transfer_buffer);
1365
1366 dbg("%s - port %d", __FUNCTION__, port->number);
5c09d144 1367
0fb0aa18
GKH		 1368 if (status) {
1369 dbg("nonzero write bulk status received: %d", status);
1da177e4
LT		 1370 return;
1371 }
1372
22465400
IA		 1373 priv = usb_get_serial_port_data(port);
1374 if (!priv) {
1375 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1376 return;
1377 }
1378 /* account for transferred data */
1379 countback = urb->actual_length;
1380 data_offset = priv->write_offset;
1381 if (data_offset > 0) {
1382 /* Subtract the control bytes */
1383 countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ));
1384 }
1385 spin_lock_irqsave(&priv->tx_lock, flags);
1386 --priv->tx_outstanding_urbs;
1387 priv->tx_outstanding_bytes -= countback;
1388 spin_unlock_irqrestore(&priv->tx_lock, flags);
1389
cf2c7481 1390 usb_serial_port_softint(port);
1da177e4
LT		 1391} /* ftdi_write_bulk_callback */
1392
1393
1394static int ftdi_write_room( struct usb_serial_port *port )
1395{
22465400
IA		 1396 struct ftdi_private *priv = usb_get_serial_port_data(port);
1397 int room;
1398 unsigned long flags;
1399
1da177e4
LT		 1400 dbg("%s - port %d", __FUNCTION__, port->number);
1401
22465400
IA		 1402 spin_lock_irqsave(&priv->tx_lock, flags);
1403 if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) {
1404 /*
1405 * We really can take anything the user throws at us
1406 * but let's pick a nice big number to tell the tty
1407 * layer that we have lots of free space
1408 */
1409 room = 2048;
1410 } else {
1411 room = 0;
1412 }
1413 spin_unlock_irqrestore(&priv->tx_lock, flags);
1414 return room;
1da177e4
LT		 1415} /* ftdi_write_room */
1416
1417
1418static int ftdi_chars_in_buffer (struct usb_serial_port *port)
1419{ /* ftdi_chars_in_buffer */
22465400
IA		 1420 struct ftdi_private *priv = usb_get_serial_port_data(port);
1421 int buffered;
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 buffered = (int)priv->tx_outstanding_bytes;
1428 spin_unlock_irqrestore(&priv->tx_lock, flags);
1429 if (buffered < 0) {
1430 err("%s outstanding tx bytes is negative!", __FUNCTION__);
1431 buffered = 0;
1432 }
1433 return buffered;
1da177e4
LT		 1434} /* ftdi_chars_in_buffer */
1435
1436
1437
7d12e780 1438static void ftdi_read_bulk_callback (struct urb *urb)
1da177e4
LT		 1439{ /* ftdi_read_bulk_callback */
1440 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1441 struct tty_struct *tty;
1442 struct ftdi_private *priv;
22465400
IA		 1443 unsigned long countread;
1444 unsigned long flags;
0fb0aa18 1445 int status = urb->status;
1da177e4
LT		 1446
1447 if (urb->number_of_packets > 0) {
1448 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__,
1449 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets );
1450 err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags );
1451 }
1452
1453 dbg("%s - port %d", __FUNCTION__, port->number);
1454
1455 if (port->open_count <= 0)
1456 return;
1457
1458 tty = port->tty;
1459 if (!tty) {
1460 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1461 return;
1462 }
1463
1464 priv = usb_get_serial_port_data(port);
1465 if (!priv) {
1466 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1467 return;
1468 }
1469
1470 if (urb != port->read_urb) {
1471 err("%s - Not my urb!", __FUNCTION__);
1472 }
1473
0fb0aa18 1474 if (status) {
1da177e4 1475 /* This will happen at close every time so it is a dbg not an err */
0fb0aa18
GKH		 1476 dbg("(this is ok on close) nonzero read bulk status received: "
1477 "%d", status);
1da177e4
LT		 1478 return;
1479 }
1480
22465400
IA		 1481 /* count data bytes, but not status bytes */
1482 countread = urb->actual_length;
1483 countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ);
1484 spin_lock_irqsave(&priv->rx_lock, flags);
1485 priv->rx_bytes += countread;
1486 spin_unlock_irqrestore(&priv->rx_lock, flags);
1487
c4028958 1488 ftdi_process_read(&priv->rx_work.work);
1da177e4
LT		 1489
1490} /* ftdi_read_bulk_callback */
1491
1492
c4028958 1493static void ftdi_process_read (struct work_struct *work)
1da177e4 1494{ /* ftdi_process_read */
c4028958
DH		 1495 struct ftdi_private *priv =
1496 container_of(work, struct ftdi_private, rx_work.work);
1497 struct usb_serial_port *port = priv->port;
1da177e4
LT		 1498 struct urb *urb;
1499 struct tty_struct *tty;
1da177e4 1500 char error_flag;
5c09d144 1501 unsigned char *data;
1da177e4
LT		 1502
1503 int i;
1504 int result;
1505 int need_flip;
1506 int packet_offset;
76854cea 1507 unsigned long flags;
1da177e4
LT		 1508
1509 dbg("%s - port %d", __FUNCTION__, port->number);
1510
1511 if (port->open_count <= 0)
1512 return;
1513
1514 tty = port->tty;
1515 if (!tty) {
1516 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1517 return;
1518 }
1519
1520 priv = usb_get_serial_port_data(port);
1521 if (!priv) {
1522 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1523 return;
1524 }
1525
1526 urb = port->read_urb;
1527 if (!urb) {
1528 dbg("%s - bad read_urb pointer - exiting", __FUNCTION__);
1529 return;
1530 }
1531
1532 data = urb->transfer_buffer;
1533
76854cea
IA		 1534 if (priv->rx_processed) {
1535 dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__,
1536 priv->rx_processed,
1537 urb->actual_length - priv->rx_processed);
1da177e4 1538 } else {
76854cea
IA		 1539 /* The first two bytes of every read packet are status */
1540 if (urb->actual_length > 2) {
1541 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1542 } else {
1543 dbg("Status only: %03oo %03oo",data[0],data[1]);
1544 }
1545 }
1da177e4
LT		 1546
1547
1548 /* TO DO -- check for hung up line and handle appropriately: */
1549 /* send hangup */
1550 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */
1551 /* if CD is dropped and the line is not CLOCAL then we should hangup */
1552
1553 need_flip = 0;
76854cea
IA		 1554 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) {
1555 int length;
1556
1da177e4 1557 /* Compare new line status to the old one, signal if different */
76854cea
IA		 1558 /* N.B. packet may be processed more than once, but differences
1559 * are only processed once. */
1da177e4
LT		 1560 if (priv != NULL) {
1561 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK;
1562 if (new_status != priv->prev_status) {
1563 priv->diff_status |= new_status ^ priv->prev_status;
1564 wake_up_interruptible(&priv->delta_msr_wait);
1565 priv->prev_status = new_status;
1566 }
1567 }
1568
76854cea
IA		 1569 length = min(PKTSZ, urb->actual_length-packet_offset)-2;
1570 if (length < 0) {
1571 err("%s - bad packet length: %d", __FUNCTION__, length+2);
1572 length = 0;
1573 }
1574
76854cea
IA		 1575 if (priv->rx_flags & THROTTLED) {
1576 dbg("%s - throttled", __FUNCTION__);
1577 break;
1578 }
33f0f88f 1579 if (tty_buffer_request_room(tty, length) < length) {
76854cea
IA		 1580 /* break out & wait for throttling/unthrottling to happen */
1581 dbg("%s - receive room low", __FUNCTION__);
1582 break;
1583 }
1584
1da177e4
LT		 1585 /* Handle errors and break */
1586 error_flag = TTY_NORMAL;
1587 /* Although the device uses a bitmask and hence can have multiple */
1588 /* errors on a packet - the order here sets the priority the */
1589 /* error is returned to the tty layer */
1590
1591 if ( data[packet_offset+1] & FTDI_RS_OE ) {
1592 error_flag = TTY_OVERRUN;
1593 dbg("OVERRRUN error");
1594 }
1595 if ( data[packet_offset+1] & FTDI_RS_BI ) {
1596 error_flag = TTY_BREAK;
1597 dbg("BREAK received");
1598 }
1599 if ( data[packet_offset+1] & FTDI_RS_PE ) {
1600 error_flag = TTY_PARITY;
1601 dbg("PARITY error");
1602 }
1603 if ( data[packet_offset+1] & FTDI_RS_FE ) {
1604 error_flag = TTY_FRAME;
1605 dbg("FRAMING error");
1606 }
76854cea
IA		 1607 if (length > 0) {
1608 for (i = 2; i < length+2; i++) {
5c09d144 1609 /* Note that the error flag is duplicated for
1da177e4
LT		 1610 every character received since we don't know
1611 which character it applied to */
1612 tty_insert_flip_char(tty, data[packet_offset+i], error_flag);
1613 }
1614 need_flip = 1;
1615 }
1616
1617#ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW
1618 /* if a parity error is detected you get status packets forever
1619 until a character is sent without a parity error.
1620 This doesn't work well since the application receives a never
1621 ending stream of bad data - even though new data hasn't been sent.
1622 Therefore I (bill) have taken this out.
5c09d144 1623 However - this might make sense for framing errors and so on
1da177e4
LT		 1624 so I am leaving the code in for now.
1625 */
1626 else {
1627 if (error_flag != TTY_NORMAL){
1628 dbg("error_flag is not normal");
1629 /* In this case it is just status - if that is an error send a bad character */
1630 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
1631 tty_flip_buffer_push(tty);
1632 }
1633 tty_insert_flip_char(tty, 0xff, error_flag);
1634 need_flip = 1;
1635 }
1636 }
1637#endif
1638 } /* "for(packet_offset=0..." */
1639
1640 /* Low latency */
1641 if (need_flip) {
1642 tty_flip_buffer_push(tty);
1643 }
1644
76854cea
IA		 1645 if (packet_offset < urb->actual_length) {
1646 /* not completely processed - record progress */
1647 priv->rx_processed = packet_offset;
1648 dbg("%s - incomplete, %d bytes processed, %d remain",
1649 __FUNCTION__, packet_offset,
1650 urb->actual_length - packet_offset);
1651 /* check if we were throttled while processing */
1652 spin_lock_irqsave(&priv->rx_lock, flags);
1653 if (priv->rx_flags & THROTTLED) {
1654 priv->rx_flags |= ACTUALLY_THROTTLED;
1655 spin_unlock_irqrestore(&priv->rx_lock, flags);
1656 dbg("%s - deferring remainder until unthrottled",
1657 __FUNCTION__);
1658 return;
1659 }
1660 spin_unlock_irqrestore(&priv->rx_lock, flags);
1661 /* if the port is closed stop trying to read */
1662 if (port->open_count > 0){
1663 /* delay processing of remainder */
1664 schedule_delayed_work(&priv->rx_work, 1);
1665 } else {
1666 dbg("%s - port is closed", __FUNCTION__);
1667 }
1668 return;
1669 }
1670
1671 /* urb is completely processed */
1672 priv->rx_processed = 0;
1673
1da177e4
LT		 1674 /* if the port is closed stop trying to read */
1675 if (port->open_count > 0){
1676 /* Continue trying to always read */
5c09d144 1677 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1da177e4
LT		 1678 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
1679 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1680 ftdi_read_bulk_callback, port);
1681
1682 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1683 if (result)
1684 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1685 }
1686
1687 return;
1688} /* ftdi_process_read */
1689
1690
1691static void ftdi_break_ctl( struct usb_serial_port *port, int break_state )
1692{
1693 struct ftdi_private *priv = usb_get_serial_port_data(port);
5c09d144 1694 __u16 urb_value = 0;
1da177e4 1695 char buf[1];
5c09d144 1696
1da177e4
LT		 1697 /* break_state = -1 to turn on break, and 0 to turn off break */
1698 /* see drivers/char/tty_io.c to see it used */
1699 /* last_set_data_urb_value NEVER has the break bit set in it */
1700
1701 if (break_state) {
1702 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
1703 } else {
5c09d144 1704 urb_value = priv->last_set_data_urb_value;
1da177e4
LT		 1705 }
1706
5c09d144 1707
1da177e4 1708 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
5c09d144 1709 FTDI_SIO_SET_DATA_REQUEST,
1da177e4
LT		 1710 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1711 urb_value , priv->interface,
1712 buf, 0, WDR_TIMEOUT) < 0) {
1713 err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state);
5c09d144 1714 }
1da177e4
LT		 1715
1716 dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value);
5c09d144 1717
1da177e4
LT		 1718}
1719
1720
1721/* old_termios contains the original termios settings and tty->termios contains
1722 * the new setting to be used
1723 * WARNING: set_termios calls this with old_termios in kernel space
1724 */
1725
606d099c 1726static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
1da177e4
LT		 1727{ /* ftdi_termios */
1728 struct usb_device *dev = port->serial->dev;
1da177e4 1729 struct ftdi_private *priv = usb_get_serial_port_data(port);
669a6db1
AC		 1730 struct ktermios *termios = port->tty->termios;
1731 unsigned int cflag = termios->c_cflag;
1da177e4
LT		 1732 __u16 urb_value; /* will hold the new flags */
1733 char buf[1]; /* Perhaps I should dynamically alloc this? */
5c09d144 1734
1da177e4 1735 // Added for xon/xoff support
669a6db1 1736 unsigned int iflag = termios->c_iflag;
1da177e4
LT		 1737 unsigned char vstop;
1738 unsigned char vstart;
5c09d144 1739
1da177e4
LT		 1740 dbg("%s", __FUNCTION__);
1741
1742 /* Force baud rate if this device requires it, unless it is set to B0. */
669a6db1 1743 if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) {
1da177e4 1744 dbg("%s: forcing baud rate for this device", __FUNCTION__);
bd5e47cc
AM		 1745 tty_encode_baud_rate(port->tty, priv->force_baud,
1746 priv->force_baud);
1da177e4
LT		 1747 }
1748
1749 /* Force RTS-CTS if this device requires it. */
1750 if (priv->force_rtscts) {
1751 dbg("%s: forcing rtscts for this device", __FUNCTION__);
669a6db1 1752 termios->c_cflag |= CRTSCTS;
1da177e4
LT		 1753 }
1754
669a6db1 1755 cflag = termios->c_cflag;
1da177e4 1756
5c09d144
DB		 1757 /* FIXME -For this cut I don't care if the line is really changing or
1758 not - so just do the change regardless - should be able to
1da177e4 1759 compare old_termios and tty->termios */
5c09d144
DB		 1760 /* NOTE These routines can get interrupted by
1761 ftdi_sio_read_bulk_callback - need to examine what this
1da177e4 1762 means - don't see any problems yet */
5c09d144 1763
1da177e4 1764 /* Set number of data bits, parity, stop bits */
5c09d144 1765
669a6db1
AC		 1766 termios->c_cflag &= ~CMSPAR;
1767
1da177e4
LT		 1768 urb_value = 0;
1769 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
1770 FTDI_SIO_SET_DATA_STOP_BITS_1);
5c09d144
DB		 1771 urb_value |= (cflag & PARENB ?
1772 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
1da177e4
LT		 1773 FTDI_SIO_SET_DATA_PARITY_EVEN) :
1774 FTDI_SIO_SET_DATA_PARITY_NONE);
1775 if (cflag & CSIZE) {
1776 switch (cflag & CSIZE) {
1777 case CS5: urb_value |= 5; dbg("Setting CS5"); break;
1778 case CS6: urb_value |= 6; dbg("Setting CS6"); break;
1779 case CS7: urb_value |= 7; dbg("Setting CS7"); break;
1780 case CS8: urb_value |= 8; dbg("Setting CS8"); break;
1781 default:
1782 err("CSIZE was set but not CS5-CS8");
1783 }
1784 }
1785
1786 /* This is needed by the break command since it uses the same command - but is
1787 * or'ed with this value */
1788 priv->last_set_data_urb_value = urb_value;
5c09d144 1789
1da177e4 1790 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
5c09d144 1791 FTDI_SIO_SET_DATA_REQUEST,
1da177e4
LT		 1792 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1793 urb_value , priv->interface,
279e1545 1794 buf, 0, WDR_SHORT_TIMEOUT) < 0) {
1da177e4 1795 err("%s FAILED to set databits/stopbits/parity", __FUNCTION__);
5c09d144 1796 }
1da177e4
LT		 1797
1798 /* Now do the baudrate */
1799 if ((cflag & CBAUD) == B0 ) {
1800 /* Disable flow control */
1801 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
5c09d144 1802 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1da177e4 1803 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
5c09d144 1804 0, priv->interface,
1da177e4
LT		 1805 buf, 0, WDR_TIMEOUT) < 0) {
1806 err("%s error from disable flowcontrol urb", __FUNCTION__);
5c09d144 1807 }
1da177e4 1808 /* Drop RTS and DTR */
74ede0ff 1809 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1da177e4
LT		 1810 } else {
1811 /* set the baudrate determined before */
1812 if (change_speed(port)) {
72a755fc
PF		 1813 err("%s urb failed to set baudrate", __FUNCTION__);
1814 }
1815 /* Ensure RTS and DTR are raised when baudrate changed from 0 */
57845bd1 1816 if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) {
72a755fc 1817 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1da177e4 1818 }
1da177e4
LT		 1819 }
1820
1821 /* Set flow control */
1822 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
1823 if (cflag & CRTSCTS) {
1824 dbg("%s Setting to CRTSCTS flow control", __FUNCTION__);
5c09d144 1825 if (usb_control_msg(dev,
1da177e4 1826 usb_sndctrlpipe(dev, 0),
5c09d144 1827 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1da177e4
LT		 1828 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1829 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
1830 buf, 0, WDR_TIMEOUT) < 0) {
1831 err("urb failed to set to rts/cts flow control");
5c09d144
DB		 1832 }
1833
1834 } else {
1da177e4
LT		 1835 /*
1836 * Xon/Xoff code
1837 *
1838 * Check the IXOFF status in the iflag component of the termios structure
1839 * if IXOFF is not set, the pre-xon/xoff code is executed.
1840 */
1841 if (iflag & IXOFF) {
1842 dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag);
1843 // Try to enable the XON/XOFF on the ftdi_sio
1844 // Set the vstart and vstop -- could have been done up above where
1845 // a lot of other dereferencing is done but that would be very
1846 // inefficient as vstart and vstop are not always needed
669a6db1
AC		 1847 vstart = termios->c_cc[VSTART];
1848 vstop = termios->c_cc[VSTOP];
1da177e4
LT		 1849 urb_value=(vstop << 8) | (vstart);
1850
1851 if (usb_control_msg(dev,
1852 usb_sndctrlpipe(dev, 0),
1853 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1854 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1855 urb_value , (FTDI_SIO_XON_XOFF_HS
1856 | priv->interface),
1857 buf, 0, WDR_TIMEOUT) < 0) {
1858 err("urb failed to set to xon/xoff flow control");
1859 }
1860 } else {
1861 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */
1862 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */
1863 dbg("%s Turning off hardware flow control", __FUNCTION__);
5c09d144 1864 if (usb_control_msg(dev,
1da177e4 1865 usb_sndctrlpipe(dev, 0),
5c09d144 1866 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1da177e4 1867 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
5c09d144 1868 0, priv->interface,
1da177e4
LT		 1869 buf, 0, WDR_TIMEOUT) < 0) {
1870 err("urb failed to clear flow control");
5c09d144 1871 }
1da177e4 1872 }
5c09d144 1873
1da177e4
LT		 1874 }
1875 return;
1876} /* ftdi_termios */
1877
1878
1879static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file)
1880{
1881 struct ftdi_private *priv = usb_get_serial_port_data(port);
1882 unsigned char buf[2];
1883 int ret;
1884
1885 dbg("%s TIOCMGET", __FUNCTION__);
1886 switch (priv->chip_type) {
1887 case SIO:
1888 /* Request the status from the device */
5c09d144 1889 if ((ret = usb_control_msg(port->serial->dev,
1da177e4 1890 usb_rcvctrlpipe(port->serial->dev, 0),
5c09d144 1891 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1da177e4 1892 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
5c09d144 1893 0, 0,
1da177e4
LT		 1894 buf, 1, WDR_TIMEOUT)) < 0 ) {
1895 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
1896 ret);
1897 return(ret);
1898 }
1899 break;
1900 case FT8U232AM:
1901 case FT232BM:
1902 case FT2232C:
ed6e5282 1903 case FT232RL:
1da177e4
LT		 1904 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same
1905 format as the data returned from the in point */
5c09d144 1906 if ((ret = usb_control_msg(port->serial->dev,
1da177e4 1907 usb_rcvctrlpipe(port->serial->dev, 0),
5c09d144 1908 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1da177e4 1909 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
5c09d144 1910 0, priv->interface,
1da177e4
LT		 1911 buf, 2, WDR_TIMEOUT)) < 0 ) {
1912 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
1913 ret);
1914 return(ret);
1915 }
1916 break;
1917 default:
1918 return -EFAULT;
1919 break;
1920 }
5c09d144 1921
1da177e4
LT		 1922 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
1923 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
1924 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) |
1925 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) |
5c09d144 1926 priv->last_dtr_rts;
1da177e4
LT		 1927}
1928
1929static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear)
1930{
1da177e4 1931 dbg("%s TIOCMSET", __FUNCTION__);
74ede0ff 1932 return update_mctrl(port, set, clear);
1da177e4
LT		 1933}
1934
1935
1936static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
1937{
1938 struct ftdi_private *priv = usb_get_serial_port_data(port);
1939
1da177e4
LT		 1940 dbg("%s cmd 0x%04x", __FUNCTION__, cmd);
1941
1942 /* Based on code from acm.c and others */
1943 switch (cmd) {
1944
1da177e4
LT		 1945 case TIOCGSERIAL: /* gets serial port data */
1946 return get_serial_info(port, (struct serial_struct __user *) arg);
1947
1948 case TIOCSSERIAL: /* sets serial port data */
1949 return set_serial_info(port, (struct serial_struct __user *) arg);
1950
1951 /*
1952 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1953 * - mask passed in arg for lines of interest
1954 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1955 * Caller should use TIOCGICOUNT to see which one it was.
1956 *
1957 * This code is borrowed from linux/drivers/char/serial.c
1958 */
1959 case TIOCMIWAIT:
1960 while (priv != NULL) {
1961 interruptible_sleep_on(&priv->delta_msr_wait);
1962 /* see if a signal did it */
1963 if (signal_pending(current))
1964 return -ERESTARTSYS;
1965 else {
1966 char diff = priv->diff_status;
1967
1968 if (diff == 0) {
1969 return -EIO; /* no change => error */
1970 }
1971
1972 /* Consume all events */
1973 priv->diff_status = 0;
1974
1975 /* Return 0 if caller wanted to know about these bits */
1976 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
1977 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
1978 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) ||
1979 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) {
1980 return 0;
1981 }
1982 /*
1983 * Otherwise caller can't care less about what happened,
1984 * and so we continue to wait for more events.
1985 */
1986 }
1987 }
1988 return(0);
1989 break;
1990 default:
1991 break;
5c09d144 1992
1da177e4
LT		 1993 }
1994
1995
5c09d144 1996 /* This is not necessarily an error - turns out the higher layers will do
1da177e4
LT		 1997 * some ioctls itself (see comment above)
1998 */
1999 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd);
2000
2001 return(-ENOIOCTLCMD);
2002} /* ftdi_ioctl */
2003
2004
2005static void ftdi_throttle (struct usb_serial_port *port)
2006{
2007 struct ftdi_private *priv = usb_get_serial_port_data(port);
2008 unsigned long flags;
2009
2010 dbg("%s - port %d", __FUNCTION__, port->number);
2011
2012 spin_lock_irqsave(&priv->rx_lock, flags);
2013 priv->rx_flags |= THROTTLED;
2014 spin_unlock_irqrestore(&priv->rx_lock, flags);
2015}
2016
2017
2018static void ftdi_unthrottle (struct usb_serial_port *port)
2019{
2020 struct ftdi_private *priv = usb_get_serial_port_data(port);
2021 int actually_throttled;
2022 unsigned long flags;
2023
2024 dbg("%s - port %d", __FUNCTION__, port->number);
2025
2026 spin_lock_irqsave(&priv->rx_lock, flags);
2027 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
2028 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
2029 spin_unlock_irqrestore(&priv->rx_lock, flags);
2030
2031 if (actually_throttled)
c4028958 2032 schedule_delayed_work(&priv->rx_work, 0);
1da177e4
LT		 2033}
2034
2035static int __init ftdi_init (void)
2036{
2037 int retval;
2038
2039 dbg("%s", __FUNCTION__);
fdcb0a0f
IA		 2040 if (vendor > 0 && product > 0) {
2041 /* Add user specified VID/PID to reserved element of table. */
2042 int i;
2043 for (i = 0; id_table_combined[i].idVendor; i++)
2044 ;
2045 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
2046 id_table_combined[i].idVendor = vendor;
2047 id_table_combined[i].idProduct = product;
2048 }
8f977e42 2049 retval = usb_serial_register(&ftdi_sio_device);
1da177e4 2050 if (retval)
8f977e42 2051 goto failed_sio_register;
1da177e4 2052 retval = usb_register(&ftdi_driver);
5c09d144 2053 if (retval)
1da177e4
LT		 2054 goto failed_usb_register;
2055
2056 info(DRIVER_VERSION ":" DRIVER_DESC);
2057 return 0;
2058failed_usb_register:
8f977e42
IA		 2059 usb_serial_deregister(&ftdi_sio_device);
2060failed_sio_register:
1da177e4
LT		 2061 return retval;
2062}
2063
2064
2065static void __exit ftdi_exit (void)
2066{
2067
2068 dbg("%s", __FUNCTION__);
2069
2070 usb_deregister (&ftdi_driver);
8f977e42 2071 usb_serial_deregister (&ftdi_sio_device);
1da177e4
LT		 2072
2073}
2074
2075
2076module_init(ftdi_init);
2077module_exit(ftdi_exit);
2078
2079MODULE_AUTHOR( DRIVER_AUTHOR );
2080MODULE_DESCRIPTION( DRIVER_DESC );
2081MODULE_LICENSE("GPL");
2082
2083module_param(debug, bool, S_IRUGO | S_IWUSR);
2084MODULE_PARM_DESC(debug, "Debug enabled or not");
fdcb0a0f
IA		 2085module_param(vendor, ushort, 0);
2086MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
2087 __MODULE_STRING(FTDI_VID)")");
2088module_param(product, ushort, 0);
2089MODULE_PARM_DESC(vendor, "User specified product ID");
1da177e4 2090
Linux kernel - Deliverables
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