4 * Copyright (C) 1999 - 2001
5 * Greg Kroah-Hartman (greg@kroah.com)
6 * Bill Ryder (bryder@sgi.com)
8 * Kuba Ober (kuba@mareimbrium.org)
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.
15 * See Documentation/usb/usb-serial.txt for more information on using this driver
17 * See http://ftdi-usb-sio.sourceforge.net for upto date testing info
18 * and extra documentation
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.
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 :-) */
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>
42 #include <linux/usb/serial.h>
48 #define DRIVER_VERSION "v1.4.3"
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"
53 static __u16 vendor = FTDI_VID;
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
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;
75 unsigned long rx_bytes;
77 __u16 interface; /* FT2232C port interface (0 for FT232/245) */
79 speed_t force_baud; /* if non-zero, force the baud rate to this value */
80 int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */
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;
88 /* struct ftdi_sio_quirk is used by devices requiring special attention. */
89 struct ftdi_sio_quirk {
90 int (*probe)(struct usb_serial *);
91 void (*port_probe)(struct ftdi_private *); /* Special settings for probed ports. */
94 static int ftdi_jtag_probe (struct usb_serial *serial);
95 static int ftdi_mtxorb_hack_setup (struct usb_serial *serial);
96 static void ftdi_USB_UIRT_setup (struct ftdi_private *priv);
97 static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv);
99 static struct ftdi_sio_quirk ftdi_jtag_quirk = {
100 .probe = ftdi_jtag_probe,
103 static struct ftdi_sio_quirk ftdi_mtxorb_hack_quirk = {
104 .probe = ftdi_mtxorb_hack_setup,
107 static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
108 .port_probe = ftdi_USB_UIRT_setup,
111 static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = {
112 .port_probe = ftdi_HE_TIRA1_setup,
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
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)
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.
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]
133 static struct usb_device_id id_table_combined [] = {
134 { USB_DEVICE(FTDI_VID, FTDI_AMC232_PID) },
135 { USB_DEVICE(FTDI_VID, FTDI_CANUSB_PID) },
136 { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_0_PID) },
137 { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_1_PID) },
138 { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_2_PID) },
139 { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_3_PID) },
140 { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_4_PID) },
141 { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_5_PID) },
142 { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_6_PID) },
143 { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_7_PID) },
144 { USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) },
145 { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) },
146 { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) },
147 { USB_DEVICE(FTDI_VID, FTDI_IPLUS2_PID) },
148 { USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) },
149 { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
150 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
151 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
152 { USB_DEVICE(FTDI_VID, FTDI_232RL_PID) },
153 { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
154 { USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
155 { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
156 { USB_DEVICE(FTDI_VID, FTDI_OPENDCC_PID) },
157 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
158 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
159 { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
160 { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
161 { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
162 { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
163 { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
164 { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
165 { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
166 { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
167 { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
168 { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
169 { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
170 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
171 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
172 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
173 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
174 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
175 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
176 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
177 { USB_DEVICE(MTXORB_VK_VID, MTXORB_VK_PID),
178 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
179 { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
180 { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
181 { USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
182 { USB_DEVICE(FTDI_VID, FTDI_USBX_707_PID) },
183 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
184 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
185 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
186 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
187 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) },
188 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
189 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
190 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
191 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
192 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
193 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
194 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
195 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
196 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
197 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
198 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
199 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
200 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
201 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
202 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
203 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
204 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
205 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
206 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
207 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
208 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
209 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
210 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
211 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
212 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
213 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
214 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
215 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
216 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
217 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
218 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
219 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
220 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
221 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
222 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
223 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
224 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
225 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
226 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
227 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
228 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
229 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
230 { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
231 { USB_DEVICE(OCT_VID, OCT_US101_PID) },
232 { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
233 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
234 { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
235 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
236 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
237 { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
238 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
239 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
240 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
241 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
242 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
243 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
244 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
245 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
246 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
247 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
248 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
249 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
250 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
251 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
252 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
253 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
254 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
255 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
256 { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) },
257 { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
258 { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
259 { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
260 { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
261 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
262 { USB_DEVICE(FTDI_VID, FTDI_IBS_US485_PID) },
263 { USB_DEVICE(FTDI_VID, FTDI_IBS_PICPRO_PID) },
264 { USB_DEVICE(FTDI_VID, FTDI_IBS_PCMCIA_PID) },
265 { USB_DEVICE(FTDI_VID, FTDI_IBS_PK1_PID) },
266 { USB_DEVICE(FTDI_VID, FTDI_IBS_RS232MON_PID) },
267 { USB_DEVICE(FTDI_VID, FTDI_IBS_APP70_PID) },
268 { USB_DEVICE(FTDI_VID, FTDI_IBS_PEDO_PID) },
269 { USB_DEVICE(FTDI_VID, FTDI_IBS_PROD_PID) },
271 * Due to many user requests for multiple ELV devices we enable
274 { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) },
275 { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) },
276 { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) },
277 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) },
278 { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) },
279 { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) },
280 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) },
281 { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) },
282 { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) },
283 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) },
284 { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) },
285 { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) },
286 { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) },
287 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) },
288 { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) },
289 { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) },
290 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) },
291 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) },
292 { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1010PC_PID) },
293 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) },
294 { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
295 { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
296 { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
297 { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
298 { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
299 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
300 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
301 { USB_DEVICE(FTDI_VID, FTDI_CCSMACHX_2_PID) },
302 { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
303 { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
304 { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
305 { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
306 { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
307 { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) },
308 { USB_DEVICE(TTI_VID, TTI_QL355P_PID) },
309 { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
310 { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
311 { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
312 { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
313 { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
314 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
315 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
316 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
317 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
318 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
319 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
320 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
321 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
322 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
323 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
324 { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
325 { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
326 { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) },
327 { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) },
328 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
329 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
330 { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) },
331 { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) },
332 { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) },
333 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) },
334 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
335 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
336 { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
337 { USB_DEVICE(EVOLUTION_VID, EVO_HYBRID_PID) },
338 { USB_DEVICE(EVOLUTION_VID, EVO_RCM4_PID) },
339 { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
340 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
341 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
342 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
343 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
344 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16IC_PID) },
345 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
346 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
347 { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
348 { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
349 { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) },
350 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
351 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
352 { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
353 { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
354 { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
355 { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
356 { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
357 { USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
358 { USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
359 { USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
360 { USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
361 { USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
362 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) },
363 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) },
364 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) },
365 { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) },
366 { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) },
367 { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) },
368 { USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) },
369 { USB_DEVICE(FTDI_VID, FTDI_ELSTER_UNICOM_PID) },
370 { USB_DEVICE(FTDI_VID, FTDI_PROPOX_JTAGCABLEII_PID) },
371 { USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID),
372 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
373 { USB_DEVICE(FIC_VID, FIC_NEO1973_DEBUG_PID),
374 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
375 { USB_DEVICE(FTDI_VID, FTDI_OOCDLINK_PID),
376 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
377 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID_USB60F) },
378 { }, /* Optional parameter entry */
379 { } /* Terminating entry */
382 MODULE_DEVICE_TABLE (usb, id_table_combined);
384 static struct usb_driver ftdi_driver = {
386 .probe = usb_serial_probe,
387 .disconnect = usb_serial_disconnect,
388 .id_table = id_table_combined,
392 static const char *ftdi_chip_name[] = {
393 [SIO] = "SIO", /* the serial part of FT8U100AX */
394 [FT8U232AM] = "FT8U232AM",
395 [FT232BM] = "FT232BM",
396 [FT2232C] = "FT2232C",
397 [FT232RL] = "FT232RL",
401 /* Constants for read urb and write urb */
406 #define THROTTLED 0x01
407 #define ACTUALLY_THROTTLED 0x02
409 /* Used for TIOCMIWAIT */
410 #define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
411 #define FTDI_STATUS_B1_MASK (FTDI_RS_BI)
414 #define FTDI_IMPL_ASYNC_FLAGS = (ASYNC_SPD_HI | ASYNC_SPD_VHI \
415 | ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP)
417 /* function prototypes for a FTDI serial converter */
418 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id);
419 static void ftdi_shutdown (struct usb_serial *serial);
420 static int ftdi_sio_port_probe (struct usb_serial_port *port);
421 static int ftdi_sio_port_remove (struct usb_serial_port *port);
422 static int ftdi_open (struct usb_serial_port *port, struct file *filp);
423 static void ftdi_close (struct usb_serial_port *port, struct file *filp);
424 static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count);
425 static int ftdi_write_room (struct usb_serial_port *port);
426 static int ftdi_chars_in_buffer (struct usb_serial_port *port);
427 static void ftdi_write_bulk_callback (struct urb *urb);
428 static void ftdi_read_bulk_callback (struct urb *urb);
429 static void ftdi_process_read (struct work_struct *work);
430 static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios * old);
431 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file);
432 static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear);
433 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
434 static void ftdi_break_ctl (struct usb_serial_port *port, int break_state );
435 static void ftdi_throttle (struct usb_serial_port *port);
436 static void ftdi_unthrottle (struct usb_serial_port *port);
438 static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base);
439 static unsigned short int ftdi_232am_baud_to_divisor (int baud);
440 static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base);
441 static __u32 ftdi_232bm_baud_to_divisor (int baud);
443 static struct usb_serial_driver ftdi_sio_device = {
445 .owner = THIS_MODULE,
448 .description = "FTDI USB Serial Device",
449 .usb_driver = &ftdi_driver ,
450 .id_table = id_table_combined,
452 .probe = ftdi_sio_probe,
453 .port_probe = ftdi_sio_port_probe,
454 .port_remove = ftdi_sio_port_remove,
457 .throttle = ftdi_throttle,
458 .unthrottle = ftdi_unthrottle,
460 .write_room = ftdi_write_room,
461 .chars_in_buffer = ftdi_chars_in_buffer,
462 .read_bulk_callback = ftdi_read_bulk_callback,
463 .write_bulk_callback = ftdi_write_bulk_callback,
464 .tiocmget = ftdi_tiocmget,
465 .tiocmset = ftdi_tiocmset,
467 .set_termios = ftdi_set_termios,
468 .break_ctl = ftdi_break_ctl,
469 .shutdown = ftdi_shutdown,
473 #define WDR_TIMEOUT 5000 /* default urb timeout */
474 #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
476 /* High and low are for DTR, RTS etc etc */
480 /* number of outstanding urbs to prevent userspace DoS from happening */
481 #define URB_UPPER_LIMIT 42
484 * ***************************************************************************
486 * ***************************************************************************
489 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
491 unsigned short int divisor;
492 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
493 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1
494 divisor = divisor3 >> 3;
496 if (divisor3 == 1) divisor |= 0xc000; else // 0.125
497 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5
498 if (divisor3 != 0) divisor |= 0x8000; // 0.25
499 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */
503 static unsigned short int ftdi_232am_baud_to_divisor(int baud)
505 return(ftdi_232am_baud_base_to_divisor(baud, 48000000));
508 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
510 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
512 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
513 divisor = divisor3 >> 3;
514 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
515 /* Deal with special cases for highest baud rates. */
516 if (divisor == 1) divisor = 0; else // 1.0
517 if (divisor == 0x4001) divisor = 1; // 1.5
521 static __u32 ftdi_232bm_baud_to_divisor(int baud)
523 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000));
526 #define set_mctrl(port, set) update_mctrl((port), (set), 0)
527 #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear))
529 static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear)
531 struct ftdi_private *priv = usb_get_serial_port_data(port);
536 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
537 dbg("%s - DTR|RTS not being set|cleared", __func__);
538 return 0; /* no change */
541 buf = kmalloc(1, GFP_NOIO);
545 clear &= ~set; /* 'set' takes precedence over 'clear' */
547 if (clear & TIOCM_DTR)
548 urb_value |= FTDI_SIO_SET_DTR_LOW;
549 if (clear & TIOCM_RTS)
550 urb_value |= FTDI_SIO_SET_RTS_LOW;
552 urb_value |= FTDI_SIO_SET_DTR_HIGH;
554 urb_value |= FTDI_SIO_SET_RTS_HIGH;
555 rv = usb_control_msg(port->serial->dev,
556 usb_sndctrlpipe(port->serial->dev, 0),
557 FTDI_SIO_SET_MODEM_CTRL_REQUEST,
558 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
559 urb_value, priv->interface,
560 buf, 0, WDR_TIMEOUT);
564 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
566 (set & TIOCM_DTR) ? "HIGH" :
567 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
568 (set & TIOCM_RTS) ? "HIGH" :
569 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
571 dbg("%s - DTR %s, RTS %s", __func__,
572 (set & TIOCM_DTR) ? "HIGH" :
573 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
574 (set & TIOCM_RTS) ? "HIGH" :
575 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
576 /* FIXME: locking on last_dtr_rts */
577 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
583 static __u32 get_ftdi_divisor(struct usb_serial_port * port);
586 static int change_speed(struct usb_serial_port *port)
588 struct ftdi_private *priv = usb_get_serial_port_data(port);
592 __u32 urb_index_value;
595 buf = kmalloc(1, GFP_NOIO);
599 urb_index_value = get_ftdi_divisor(port);
600 urb_value = (__u16)urb_index_value;
601 urb_index = (__u16)(urb_index_value >> 16);
602 if (priv->interface) { /* FT2232C */
603 urb_index = (__u16)((urb_index << 8) | priv->interface);
606 rv = usb_control_msg(port->serial->dev,
607 usb_sndctrlpipe(port->serial->dev, 0),
608 FTDI_SIO_SET_BAUDRATE_REQUEST,
609 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
610 urb_value, urb_index,
611 buf, 0, WDR_SHORT_TIMEOUT);
618 static __u32 get_ftdi_divisor(struct usb_serial_port * port)
619 { /* get_ftdi_divisor */
620 struct ftdi_private *priv = usb_get_serial_port_data(port);
626 * The logic involved in setting the baudrate can be cleanly split in 3 steps.
627 * Obtaining the actual baud rate is a little tricky since unix traditionally
628 * somehow ignored the possibility to set non-standard baud rates.
629 * 1. Standard baud rates are set in tty->termios->c_cflag
630 * 2. If these are not enough, you can set any speed using alt_speed as follows:
631 * - set tty->termios->c_cflag speed to B38400
632 * - set your real speed in tty->alt_speed; it gets ignored when
634 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
635 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just
636 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800)
637 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate
638 * 3. You can also set baud rate by setting custom divisor as follows
639 * - set tty->termios->c_cflag speed to B38400
640 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
641 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
642 * o custom_divisor set to baud_base / your_new_baudrate
643 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really
644 * spend some time and separate+move this common code to serial.c, it is
645 * replicated in nearly every serial driver you see.
648 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */
650 baud = tty_get_baud_rate(port->tty);
651 dbg("%s - tty_get_baud_rate reports speed %d", __func__, baud);
653 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */
656 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
657 (priv->custom_divisor)) {
658 baud = priv->baud_base / priv->custom_divisor;
659 dbg("%s - custom divisor %d sets baud rate to %d", __func__, priv->custom_divisor, baud);
662 /* 3. Convert baudrate to device-specific divisor */
664 if (!baud) baud = 9600;
665 switch(priv->chip_type) {
666 case SIO: /* SIO chip */
668 case 300: div_value = ftdi_sio_b300; break;
669 case 600: div_value = ftdi_sio_b600; break;
670 case 1200: div_value = ftdi_sio_b1200; break;
671 case 2400: div_value = ftdi_sio_b2400; break;
672 case 4800: div_value = ftdi_sio_b4800; break;
673 case 9600: div_value = ftdi_sio_b9600; break;
674 case 19200: div_value = ftdi_sio_b19200; break;
675 case 38400: div_value = ftdi_sio_b38400; break;
676 case 57600: div_value = ftdi_sio_b57600; break;
677 case 115200: div_value = ftdi_sio_b115200; break;
679 if (div_value == 0) {
680 dbg("%s - Baudrate (%d) requested is not supported", __func__, baud);
681 div_value = ftdi_sio_b9600;
686 case FT8U232AM: /* 8U232AM chip */
687 if (baud <= 3000000) {
688 div_value = ftdi_232am_baud_to_divisor(baud);
690 dbg("%s - Baud rate too high!", __func__);
692 div_value = ftdi_232am_baud_to_divisor(9600);
696 case FT232BM: /* FT232BM chip */
697 case FT2232C: /* FT2232C chip */
699 if (baud <= 3000000) {
700 div_value = ftdi_232bm_baud_to_divisor(baud);
702 dbg("%s - Baud rate too high!", __func__);
703 div_value = ftdi_232bm_baud_to_divisor(9600);
708 } /* priv->chip_type */
711 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
712 __func__, baud, (unsigned long)div_value,
713 ftdi_chip_name[priv->chip_type]);
716 tty_encode_baud_rate(port->tty, baud, baud);
721 static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo)
723 struct ftdi_private *priv = usb_get_serial_port_data(port);
724 struct serial_struct tmp;
728 memset(&tmp, 0, sizeof(tmp));
729 tmp.flags = priv->flags;
730 tmp.baud_base = priv->baud_base;
731 tmp.custom_divisor = priv->custom_divisor;
732 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
735 } /* get_serial_info */
738 static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo)
739 { /* set_serial_info */
740 struct ftdi_private *priv = usb_get_serial_port_data(port);
741 struct serial_struct new_serial;
742 struct ftdi_private old_priv;
744 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
748 /* Do error checking and permission checking */
750 if (!capable(CAP_SYS_ADMIN)) {
751 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
752 (priv->flags & ~ASYNC_USR_MASK)))
754 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
755 (new_serial.flags & ASYNC_USR_MASK));
756 priv->custom_divisor = new_serial.custom_divisor;
760 if ((new_serial.baud_base != priv->baud_base) &&
761 (new_serial.baud_base < 9600))
764 /* Make the changes - these are privileged changes! */
766 priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
767 (new_serial.flags & ASYNC_FLAGS));
768 priv->custom_divisor = new_serial.custom_divisor;
770 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
773 if ((old_priv.flags & ASYNC_SPD_MASK) !=
774 (priv->flags & ASYNC_SPD_MASK)) {
775 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
776 port->tty->alt_speed = 57600;
777 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
778 port->tty->alt_speed = 115200;
779 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
780 port->tty->alt_speed = 230400;
781 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
782 port->tty->alt_speed = 460800;
784 port->tty->alt_speed = 0;
786 if (((old_priv.flags & ASYNC_SPD_MASK) !=
787 (priv->flags & ASYNC_SPD_MASK)) ||
788 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
789 (old_priv.custom_divisor != priv->custom_divisor))) {
795 } /* set_serial_info */
798 /* Determine type of FTDI chip based on USB config and descriptor. */
799 static void ftdi_determine_type(struct usb_serial_port *port)
801 struct ftdi_private *priv = usb_get_serial_port_data(port);
802 struct usb_serial *serial = port->serial;
803 struct usb_device *udev = serial->dev;
807 /* Assume it is not the original SIO device for now. */
808 priv->baud_base = 48000000 / 2;
809 priv->write_offset = 0;
811 version = le16_to_cpu(udev->descriptor.bcdDevice);
812 interfaces = udev->actconfig->desc.bNumInterfaces;
813 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __func__,
814 version, interfaces);
815 if (interfaces > 1) {
818 /* Multiple interfaces. Assume FT2232C. */
819 priv->chip_type = FT2232C;
820 /* Determine interface code. */
821 inter = serial->interface->altsetting->desc.bInterfaceNumber;
823 priv->interface = PIT_SIOA;
825 priv->interface = PIT_SIOB;
827 /* BM-type devices have a bug where bcdDevice gets set
828 * to 0x200 when iSerialNumber is 0. */
829 if (version < 0x500) {
830 dbg("%s: something fishy - bcdDevice too low for multi-interface device",
833 } else if (version < 0x200) {
834 /* Old device. Assume its the original SIO. */
835 priv->chip_type = SIO;
836 priv->baud_base = 12000000 / 16;
837 priv->write_offset = 1;
838 } else if (version < 0x400) {
839 /* Assume its an FT8U232AM (or FT8U245AM) */
840 /* (It might be a BM because of the iSerialNumber bug,
841 * but it will still work as an AM device.) */
842 priv->chip_type = FT8U232AM;
843 } else if (version < 0x600) {
844 /* Assume its an FT232BM (or FT245BM) */
845 priv->chip_type = FT232BM;
847 /* Assume its an FT232R */
848 priv->chip_type = FT232RL;
850 info("Detected %s", ftdi_chip_name[priv->chip_type]);
855 * ***************************************************************************
857 * ***************************************************************************
860 static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf)
862 struct usb_serial_port *port = to_usb_serial_port(dev);
863 struct ftdi_private *priv = usb_get_serial_port_data(port);
864 struct usb_device *udev = port->serial->dev;
865 unsigned short latency = 0;
871 rv = usb_control_msg(udev,
872 usb_rcvctrlpipe(udev, 0),
873 FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
874 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
876 (char*) &latency, 1, WDR_TIMEOUT);
879 dev_err(dev, "Unable to read latency timer: %i\n", rv);
882 return sprintf(buf, "%i\n", latency);
885 /* Write a new value of the latency timer, in units of milliseconds. */
886 static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf,
889 struct usb_serial_port *port = to_usb_serial_port(dev);
890 struct ftdi_private *priv = usb_get_serial_port_data(port);
891 struct usb_device *udev = port->serial->dev;
893 int v = simple_strtoul(valbuf, NULL, 10);
896 dbg("%s: setting latency timer = %i", __func__, v);
898 rv = usb_control_msg(udev,
899 usb_sndctrlpipe(udev, 0),
900 FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
901 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
903 buf, 0, WDR_TIMEOUT);
906 dev_err(dev, "Unable to write latency timer: %i\n", rv);
913 /* Write an event character directly to the FTDI register. The ASCII
914 value is in the low 8 bits, with the enable bit in the 9th bit. */
915 static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf,
918 struct usb_serial_port *port = to_usb_serial_port(dev);
919 struct ftdi_private *priv = usb_get_serial_port_data(port);
920 struct usb_device *udev = port->serial->dev;
922 int v = simple_strtoul(valbuf, NULL, 10);
925 dbg("%s: setting event char = %i", __func__, v);
927 rv = usb_control_msg(udev,
928 usb_sndctrlpipe(udev, 0),
929 FTDI_SIO_SET_EVENT_CHAR_REQUEST,
930 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE,
932 buf, 0, WDR_TIMEOUT);
935 dbg("Unable to write event character: %i", rv);
942 static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer);
943 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);
945 static int create_sysfs_attrs(struct usb_serial_port *port)
947 struct ftdi_private *priv = usb_get_serial_port_data(port);
952 /* XXX I've no idea if the original SIO supports the event_char
953 * sysfs parameter, so I'm playing it safe. */
954 if (priv->chip_type != SIO) {
955 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]);
956 retval = device_create_file(&port->dev, &dev_attr_event_char);
958 (priv->chip_type == FT232BM ||
959 priv->chip_type == FT2232C ||
960 priv->chip_type == FT232RL)) {
961 retval = device_create_file(&port->dev,
962 &dev_attr_latency_timer);
968 static void remove_sysfs_attrs(struct usb_serial_port *port)
970 struct ftdi_private *priv = usb_get_serial_port_data(port);
974 /* XXX see create_sysfs_attrs */
975 if (priv->chip_type != SIO) {
976 device_remove_file(&port->dev, &dev_attr_event_char);
977 if (priv->chip_type == FT232BM ||
978 priv->chip_type == FT2232C ||
979 priv->chip_type == FT232RL) {
980 device_remove_file(&port->dev, &dev_attr_latency_timer);
987 * ***************************************************************************
988 * FTDI driver specific functions
989 * ***************************************************************************
992 /* Probe function to check for special devices */
993 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id)
995 struct ftdi_sio_quirk *quirk = (struct ftdi_sio_quirk *)id->driver_info;
997 if (quirk && quirk->probe) {
998 int ret = quirk->probe(serial);
1003 usb_set_serial_data(serial, (void *)id->driver_info);
1008 static int ftdi_sio_port_probe(struct usb_serial_port *port)
1010 struct ftdi_private *priv;
1011 struct ftdi_sio_quirk *quirk = usb_get_serial_data(port->serial);
1016 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL);
1018 err("%s- kmalloc(%Zd) failed.", __func__, sizeof(struct ftdi_private));
1022 spin_lock_init(&priv->rx_lock);
1023 spin_lock_init(&priv->tx_lock);
1024 init_waitqueue_head(&priv->delta_msr_wait);
1025 /* This will push the characters through immediately rather
1026 than queue a task to deliver them */
1027 priv->flags = ASYNC_LOW_LATENCY;
1029 if (quirk && quirk->port_probe)
1030 quirk->port_probe(priv);
1032 /* Increase the size of read buffers */
1033 kfree(port->bulk_in_buffer);
1034 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL);
1035 if (!port->bulk_in_buffer) {
1039 if (port->read_urb) {
1040 port->read_urb->transfer_buffer = port->bulk_in_buffer;
1041 port->read_urb->transfer_buffer_length = BUFSZ;
1044 INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read);
1047 /* Free port's existing write urb and transfer buffer. */
1048 if (port->write_urb) {
1049 usb_free_urb (port->write_urb);
1050 port->write_urb = NULL;
1052 kfree(port->bulk_out_buffer);
1053 port->bulk_out_buffer = NULL;
1055 usb_set_serial_port_data(port, priv);
1057 ftdi_determine_type (port);
1058 create_sysfs_attrs(port);
1062 /* Setup for the USB-UIRT device, which requires hardwired
1063 * baudrate (38400 gets mapped to 312500) */
1064 /* Called from usbserial:serial_probe */
1065 static void ftdi_USB_UIRT_setup (struct ftdi_private *priv)
1069 priv->flags |= ASYNC_SPD_CUST;
1070 priv->custom_divisor = 77;
1071 priv->force_baud = 38400;
1072 } /* ftdi_USB_UIRT_setup */
1074 /* Setup for the HE-TIRA1 device, which requires hardwired
1075 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */
1076 static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv)
1080 priv->flags |= ASYNC_SPD_CUST;
1081 priv->custom_divisor = 240;
1082 priv->force_baud = 38400;
1083 priv->force_rtscts = 1;
1084 } /* ftdi_HE_TIRA1_setup */
1087 * First port on JTAG adaptors such as Olimex arm-usb-ocd or the FIC/OpenMoko
1088 * Neo1973 Debug Board is reserved for JTAG interface and can be accessed from
1089 * userspace using openocd.
1091 static int ftdi_jtag_probe(struct usb_serial *serial)
1093 struct usb_device *udev = serial->dev;
1094 struct usb_interface *interface = serial->interface;
1098 if (interface == udev->actconfig->interface[0]) {
1099 info("Ignoring serial port reserved for JTAG");
1107 * The Matrix Orbital VK204-25-USB has an invalid IN endpoint.
1108 * We have to correct it if we want to read from it.
1110 static int ftdi_mtxorb_hack_setup(struct usb_serial *serial)
1112 struct usb_host_endpoint *ep = serial->dev->ep_in[1];
1113 struct usb_endpoint_descriptor *ep_desc = &ep->desc;
1115 if (ep->enabled && ep_desc->wMaxPacketSize == 0) {
1116 ep_desc->wMaxPacketSize = cpu_to_le16(0x40);
1117 info("Fixing invalid wMaxPacketSize on read pipe");
1123 /* ftdi_shutdown is called from usbserial:usb_serial_disconnect
1124 * it is called when the usb device is disconnected
1126 * usbserial:usb_serial_disconnect
1127 * calls __serial_close for each open of the port
1128 * shutdown is called then (ie ftdi_shutdown)
1130 static void ftdi_shutdown (struct usb_serial *serial)
1132 dbg("%s", __func__);
1135 static int ftdi_sio_port_remove(struct usb_serial_port *port)
1137 struct ftdi_private *priv = usb_get_serial_port_data(port);
1139 dbg("%s", __func__);
1141 remove_sysfs_attrs(port);
1143 /* all open ports are closed at this point
1144 * (by usbserial.c:__serial_close, which calls ftdi_close)
1148 usb_set_serial_port_data(port, NULL);
1155 static int ftdi_open (struct usb_serial_port *port, struct file *filp)
1157 struct usb_device *dev = port->serial->dev;
1158 struct ftdi_private *priv = usb_get_serial_port_data(port);
1159 unsigned long flags;
1162 char buf[1]; /* Needed for the usb_control_msg I think */
1164 dbg("%s", __func__);
1166 spin_lock_irqsave(&priv->tx_lock, flags);
1168 spin_unlock_irqrestore(&priv->tx_lock, flags);
1169 spin_lock_irqsave(&priv->rx_lock, flags);
1171 spin_unlock_irqrestore(&priv->rx_lock, flags);
1174 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1176 /* No error checking for this (will get errors later anyway) */
1177 /* See ftdi_sio.h for description of what is reset */
1178 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1179 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
1181 priv->interface, buf, 0, WDR_TIMEOUT);
1183 /* Termios defaults are set by usb_serial_init. We don't change
1184 port->tty->termios - this would loose speed settings, etc.
1185 This is same behaviour as serial.c/rs_open() - Kuba */
1187 /* ftdi_set_termios will send usb control messages */
1189 ftdi_set_termios(port, port->tty->termios);
1191 /* FIXME: Flow control might be enabled, so it should be checked -
1192 we have no control of defaults! */
1193 /* Turn on RTS and DTR since we are not flow controlling by default */
1194 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1197 spin_lock_irqsave(&priv->rx_lock, flags);
1198 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
1199 spin_unlock_irqrestore(&priv->rx_lock, flags);
1201 /* Start reading from the device */
1202 priv->rx_processed = 0;
1203 usb_fill_bulk_urb(port->read_urb, dev,
1204 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
1205 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1206 ftdi_read_bulk_callback, port);
1207 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
1209 err("%s - failed submitting read urb, error %d", __func__, result);
1218 * usbserial:__serial_close only calls ftdi_close if the point is open
1220 * This only gets called when it is the last close
1225 static void ftdi_close (struct usb_serial_port *port, struct file *filp)
1227 unsigned int c_cflag = port->tty->termios->c_cflag;
1228 struct ftdi_private *priv = usb_get_serial_port_data(port);
1231 dbg("%s", __func__);
1233 mutex_lock(&port->serial->disc_mutex);
1234 if (c_cflag & HUPCL && !port->serial->disconnected){
1235 /* Disable flow control */
1236 if (usb_control_msg(port->serial->dev,
1237 usb_sndctrlpipe(port->serial->dev, 0),
1238 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1239 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1240 0, priv->interface, buf, 0,
1242 err("error from flowcontrol urb");
1245 /* drop RTS and DTR */
1246 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1247 } /* Note change no line if hupcl is off */
1248 mutex_unlock(&port->serial->disc_mutex);
1250 /* cancel any scheduled reading */
1251 cancel_delayed_work(&priv->rx_work);
1252 flush_scheduled_work();
1254 /* shutdown our bulk read */
1255 usb_kill_urb(port->read_urb);
1260 /* The SIO requires the first byte to have:
1263 * B2..7 length of message excluding byte 0
1265 * The new devices do not require this byte
1267 static int ftdi_write (struct usb_serial_port *port,
1268 const unsigned char *buf, int count)
1270 struct ftdi_private *priv = usb_get_serial_port_data(port);
1272 unsigned char *buffer;
1273 int data_offset ; /* will be 1 for the SIO and 0 otherwise */
1276 unsigned long flags;
1278 dbg("%s port %d, %d bytes", __func__, port->number, count);
1281 dbg("write request of 0 bytes");
1284 spin_lock_irqsave(&priv->tx_lock, flags);
1285 if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) {
1286 spin_unlock_irqrestore(&priv->tx_lock, flags);
1287 dbg("%s - write limit hit\n", __func__);
1290 priv->tx_outstanding_urbs++;
1291 spin_unlock_irqrestore(&priv->tx_lock, flags);
1293 data_offset = priv->write_offset;
1294 dbg("data_offset set to %d",data_offset);
1296 /* Determine total transfer size */
1297 transfer_size = count;
1298 if (data_offset > 0) {
1299 /* Original sio needs control bytes too... */
1300 transfer_size += (data_offset *
1301 ((count + (PKTSZ - 1 - data_offset)) /
1302 (PKTSZ - data_offset)));
1305 buffer = kmalloc (transfer_size, GFP_ATOMIC);
1307 err("%s ran out of kernel memory for urb ...", __func__);
1309 goto error_no_buffer;
1312 urb = usb_alloc_urb(0, GFP_ATOMIC);
1314 err("%s - no more free urbs", __func__);
1320 if (data_offset > 0) {
1321 /* Original sio requires control byte at start of each packet. */
1322 int user_pktsz = PKTSZ - data_offset;
1324 unsigned char *first_byte = buffer;
1325 const unsigned char *current_position = buf;
1328 if (user_pktsz > todo) {
1331 /* Write the control byte at the front of the packet*/
1332 *first_byte = 1 | ((user_pktsz) << 2);
1333 /* Copy data for packet */
1334 memcpy (first_byte + data_offset,
1335 current_position, user_pktsz);
1336 first_byte += user_pktsz + data_offset;
1337 current_position += user_pktsz;
1341 /* No control byte required. */
1342 /* Copy in the data to send */
1343 memcpy (buffer, buf, count);
1346 usb_serial_debug_data(debug, &port->dev, __func__, transfer_size, buffer);
1348 /* fill the buffer and send it */
1349 usb_fill_bulk_urb(urb, port->serial->dev,
1350 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
1351 buffer, transfer_size,
1352 ftdi_write_bulk_callback, port);
1354 status = usb_submit_urb(urb, GFP_ATOMIC);
1356 err("%s - failed submitting write urb, error %d", __func__, status);
1360 spin_lock_irqsave(&priv->tx_lock, flags);
1361 priv->tx_outstanding_bytes += count;
1362 priv->tx_bytes += count;
1363 spin_unlock_irqrestore(&priv->tx_lock, flags);
1366 /* we are done with this urb, so let the host driver
1367 * really free it when it is finished with it */
1370 dbg("%s write returning: %d", __func__, count);
1377 spin_lock_irqsave(&priv->tx_lock, flags);
1378 priv->tx_outstanding_urbs--;
1379 spin_unlock_irqrestore(&priv->tx_lock, flags);
1384 /* This function may get called when the device is closed */
1386 static void ftdi_write_bulk_callback (struct urb *urb)
1388 unsigned long flags;
1389 struct usb_serial_port *port = urb->context;
1390 struct ftdi_private *priv;
1391 int data_offset; /* will be 1 for the SIO and 0 otherwise */
1392 unsigned long countback;
1393 int status = urb->status;
1395 /* free up the transfer buffer, as usb_free_urb() does not do this */
1396 kfree (urb->transfer_buffer);
1398 dbg("%s - port %d", __func__, port->number);
1401 dbg("nonzero write bulk status received: %d", status);
1405 priv = usb_get_serial_port_data(port);
1407 dbg("%s - bad port private data pointer - exiting", __func__);
1410 /* account for transferred data */
1411 countback = urb->actual_length;
1412 data_offset = priv->write_offset;
1413 if (data_offset > 0) {
1414 /* Subtract the control bytes */
1415 countback -= (data_offset * DIV_ROUND_UP(countback, PKTSZ));
1417 spin_lock_irqsave(&priv->tx_lock, flags);
1418 --priv->tx_outstanding_urbs;
1419 priv->tx_outstanding_bytes -= countback;
1420 spin_unlock_irqrestore(&priv->tx_lock, flags);
1422 usb_serial_port_softint(port);
1423 } /* ftdi_write_bulk_callback */
1426 static int ftdi_write_room( struct usb_serial_port *port )
1428 struct ftdi_private *priv = usb_get_serial_port_data(port);
1430 unsigned long flags;
1432 dbg("%s - port %d", __func__, port->number);
1434 spin_lock_irqsave(&priv->tx_lock, flags);
1435 if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) {
1437 * We really can take anything the user throws at us
1438 * but let's pick a nice big number to tell the tty
1439 * layer that we have lots of free space
1445 spin_unlock_irqrestore(&priv->tx_lock, flags);
1447 } /* ftdi_write_room */
1450 static int ftdi_chars_in_buffer (struct usb_serial_port *port)
1451 { /* ftdi_chars_in_buffer */
1452 struct ftdi_private *priv = usb_get_serial_port_data(port);
1454 unsigned long flags;
1456 dbg("%s - port %d", __func__, port->number);
1458 spin_lock_irqsave(&priv->tx_lock, flags);
1459 buffered = (int)priv->tx_outstanding_bytes;
1460 spin_unlock_irqrestore(&priv->tx_lock, flags);
1462 err("%s outstanding tx bytes is negative!", __func__);
1466 } /* ftdi_chars_in_buffer */
1470 static void ftdi_read_bulk_callback (struct urb *urb)
1471 { /* ftdi_read_bulk_callback */
1472 struct usb_serial_port *port = urb->context;
1473 struct tty_struct *tty;
1474 struct ftdi_private *priv;
1475 unsigned long countread;
1476 unsigned long flags;
1477 int status = urb->status;
1479 if (urb->number_of_packets > 0) {
1480 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__func__,
1481 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets );
1482 err("%s transfer_flags %x ", __func__,urb->transfer_flags );
1485 dbg("%s - port %d", __func__, port->number);
1487 if (port->open_count <= 0)
1492 dbg("%s - bad tty pointer - exiting",__func__);
1496 priv = usb_get_serial_port_data(port);
1498 dbg("%s - bad port private data pointer - exiting", __func__);
1502 if (urb != port->read_urb) {
1503 err("%s - Not my urb!", __func__);
1507 /* This will happen at close every time so it is a dbg not an err */
1508 dbg("(this is ok on close) nonzero read bulk status received: "
1513 /* count data bytes, but not status bytes */
1514 countread = urb->actual_length;
1515 countread -= 2 * DIV_ROUND_UP(countread, PKTSZ);
1516 spin_lock_irqsave(&priv->rx_lock, flags);
1517 priv->rx_bytes += countread;
1518 spin_unlock_irqrestore(&priv->rx_lock, flags);
1520 ftdi_process_read(&priv->rx_work.work);
1522 } /* ftdi_read_bulk_callback */
1525 static void ftdi_process_read (struct work_struct *work)
1526 { /* ftdi_process_read */
1527 struct ftdi_private *priv =
1528 container_of(work, struct ftdi_private, rx_work.work);
1529 struct usb_serial_port *port = priv->port;
1531 struct tty_struct *tty;
1533 unsigned char *data;
1539 unsigned long flags;
1541 dbg("%s - port %d", __func__, port->number);
1543 if (port->open_count <= 0)
1548 dbg("%s - bad tty pointer - exiting",__func__);
1552 priv = usb_get_serial_port_data(port);
1554 dbg("%s - bad port private data pointer - exiting", __func__);
1558 urb = port->read_urb;
1560 dbg("%s - bad read_urb pointer - exiting", __func__);
1564 data = urb->transfer_buffer;
1566 if (priv->rx_processed) {
1567 dbg("%s - already processed: %d bytes, %d remain", __func__,
1569 urb->actual_length - priv->rx_processed);
1571 /* The first two bytes of every read packet are status */
1572 if (urb->actual_length > 2) {
1573 usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data);
1575 dbg("Status only: %03oo %03oo",data[0],data[1]);
1580 /* TO DO -- check for hung up line and handle appropriately: */
1582 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */
1583 /* if CD is dropped and the line is not CLOCAL then we should hangup */
1586 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) {
1589 /* Compare new line status to the old one, signal if different */
1590 /* N.B. packet may be processed more than once, but differences
1591 * are only processed once. */
1593 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK;
1594 if (new_status != priv->prev_status) {
1595 priv->diff_status |= new_status ^ priv->prev_status;
1596 wake_up_interruptible(&priv->delta_msr_wait);
1597 priv->prev_status = new_status;
1601 length = min(PKTSZ, urb->actual_length-packet_offset)-2;
1603 err("%s - bad packet length: %d", __func__, length+2);
1607 if (priv->rx_flags & THROTTLED) {
1608 dbg("%s - throttled", __func__);
1611 if (tty_buffer_request_room(tty, length) < length) {
1612 /* break out & wait for throttling/unthrottling to happen */
1613 dbg("%s - receive room low", __func__);
1617 /* Handle errors and break */
1618 error_flag = TTY_NORMAL;
1619 /* Although the device uses a bitmask and hence can have multiple */
1620 /* errors on a packet - the order here sets the priority the */
1621 /* error is returned to the tty layer */
1623 if ( data[packet_offset+1] & FTDI_RS_OE ) {
1624 error_flag = TTY_OVERRUN;
1625 dbg("OVERRRUN error");
1627 if ( data[packet_offset+1] & FTDI_RS_BI ) {
1628 error_flag = TTY_BREAK;
1629 dbg("BREAK received");
1631 if ( data[packet_offset+1] & FTDI_RS_PE ) {
1632 error_flag = TTY_PARITY;
1633 dbg("PARITY error");
1635 if ( data[packet_offset+1] & FTDI_RS_FE ) {
1636 error_flag = TTY_FRAME;
1637 dbg("FRAMING error");
1640 for (i = 2; i < length+2; i++) {
1641 /* Note that the error flag is duplicated for
1642 every character received since we don't know
1643 which character it applied to */
1644 tty_insert_flip_char(tty, data[packet_offset+i], error_flag);
1649 #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW
1650 /* if a parity error is detected you get status packets forever
1651 until a character is sent without a parity error.
1652 This doesn't work well since the application receives a never
1653 ending stream of bad data - even though new data hasn't been sent.
1654 Therefore I (bill) have taken this out.
1655 However - this might make sense for framing errors and so on
1656 so I am leaving the code in for now.
1659 if (error_flag != TTY_NORMAL){
1660 dbg("error_flag is not normal");
1661 /* In this case it is just status - if that is an error send a bad character */
1662 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
1663 tty_flip_buffer_push(tty);
1665 tty_insert_flip_char(tty, 0xff, error_flag);
1670 } /* "for(packet_offset=0..." */
1674 tty_flip_buffer_push(tty);
1677 if (packet_offset < urb->actual_length) {
1678 /* not completely processed - record progress */
1679 priv->rx_processed = packet_offset;
1680 dbg("%s - incomplete, %d bytes processed, %d remain",
1681 __func__, packet_offset,
1682 urb->actual_length - packet_offset);
1683 /* check if we were throttled while processing */
1684 spin_lock_irqsave(&priv->rx_lock, flags);
1685 if (priv->rx_flags & THROTTLED) {
1686 priv->rx_flags |= ACTUALLY_THROTTLED;
1687 spin_unlock_irqrestore(&priv->rx_lock, flags);
1688 dbg("%s - deferring remainder until unthrottled",
1692 spin_unlock_irqrestore(&priv->rx_lock, flags);
1693 /* if the port is closed stop trying to read */
1694 if (port->open_count > 0){
1695 /* delay processing of remainder */
1696 schedule_delayed_work(&priv->rx_work, 1);
1698 dbg("%s - port is closed", __func__);
1703 /* urb is completely processed */
1704 priv->rx_processed = 0;
1706 /* if the port is closed stop trying to read */
1707 if (port->open_count > 0){
1708 /* Continue trying to always read */
1709 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1710 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
1711 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1712 ftdi_read_bulk_callback, port);
1714 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1716 err("%s - failed resubmitting read urb, error %d", __func__, result);
1720 } /* ftdi_process_read */
1723 static void ftdi_break_ctl( struct usb_serial_port *port, int break_state )
1725 struct ftdi_private *priv = usb_get_serial_port_data(port);
1726 __u16 urb_value = 0;
1729 /* break_state = -1 to turn on break, and 0 to turn off break */
1730 /* see drivers/char/tty_io.c to see it used */
1731 /* last_set_data_urb_value NEVER has the break bit set in it */
1734 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
1736 urb_value = priv->last_set_data_urb_value;
1740 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
1741 FTDI_SIO_SET_DATA_REQUEST,
1742 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1743 urb_value , priv->interface,
1744 buf, 0, WDR_TIMEOUT) < 0) {
1745 err("%s FAILED to enable/disable break state (state was %d)", __func__,break_state);
1748 dbg("%s break state is %d - urb is %d", __func__,break_state, urb_value);
1753 /* old_termios contains the original termios settings and tty->termios contains
1754 * the new setting to be used
1755 * WARNING: set_termios calls this with old_termios in kernel space
1758 static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
1759 { /* ftdi_termios */
1760 struct usb_device *dev = port->serial->dev;
1761 struct ftdi_private *priv = usb_get_serial_port_data(port);
1762 struct ktermios *termios = port->tty->termios;
1763 unsigned int cflag = termios->c_cflag;
1764 __u16 urb_value; /* will hold the new flags */
1765 char buf[1]; /* Perhaps I should dynamically alloc this? */
1767 // Added for xon/xoff support
1768 unsigned int iflag = termios->c_iflag;
1769 unsigned char vstop;
1770 unsigned char vstart;
1772 dbg("%s", __func__);
1774 /* Force baud rate if this device requires it, unless it is set to B0. */
1775 if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) {
1776 dbg("%s: forcing baud rate for this device", __func__);
1777 tty_encode_baud_rate(port->tty, priv->force_baud,
1781 /* Force RTS-CTS if this device requires it. */
1782 if (priv->force_rtscts) {
1783 dbg("%s: forcing rtscts for this device", __func__);
1784 termios->c_cflag |= CRTSCTS;
1787 cflag = termios->c_cflag;
1789 /* FIXME -For this cut I don't care if the line is really changing or
1790 not - so just do the change regardless - should be able to
1791 compare old_termios and tty->termios */
1792 /* NOTE These routines can get interrupted by
1793 ftdi_sio_read_bulk_callback - need to examine what this
1794 means - don't see any problems yet */
1796 /* Set number of data bits, parity, stop bits */
1798 termios->c_cflag &= ~CMSPAR;
1801 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
1802 FTDI_SIO_SET_DATA_STOP_BITS_1);
1803 urb_value |= (cflag & PARENB ?
1804 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
1805 FTDI_SIO_SET_DATA_PARITY_EVEN) :
1806 FTDI_SIO_SET_DATA_PARITY_NONE);
1807 if (cflag & CSIZE) {
1808 switch (cflag & CSIZE) {
1809 case CS5: urb_value |= 5; dbg("Setting CS5"); break;
1810 case CS6: urb_value |= 6; dbg("Setting CS6"); break;
1811 case CS7: urb_value |= 7; dbg("Setting CS7"); break;
1812 case CS8: urb_value |= 8; dbg("Setting CS8"); break;
1814 err("CSIZE was set but not CS5-CS8");
1818 /* This is needed by the break command since it uses the same command - but is
1819 * or'ed with this value */
1820 priv->last_set_data_urb_value = urb_value;
1822 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1823 FTDI_SIO_SET_DATA_REQUEST,
1824 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1825 urb_value , priv->interface,
1826 buf, 0, WDR_SHORT_TIMEOUT) < 0) {
1827 err("%s FAILED to set databits/stopbits/parity", __func__);
1830 /* Now do the baudrate */
1831 if ((cflag & CBAUD) == B0 ) {
1832 /* Disable flow control */
1833 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1834 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1835 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1837 buf, 0, WDR_TIMEOUT) < 0) {
1838 err("%s error from disable flowcontrol urb", __func__);
1840 /* Drop RTS and DTR */
1841 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1843 /* set the baudrate determined before */
1844 if (change_speed(port)) {
1845 err("%s urb failed to set baudrate", __func__);
1847 /* Ensure RTS and DTR are raised when baudrate changed from 0 */
1848 if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) {
1849 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1853 /* Set flow control */
1854 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
1855 if (cflag & CRTSCTS) {
1856 dbg("%s Setting to CRTSCTS flow control", __func__);
1857 if (usb_control_msg(dev,
1858 usb_sndctrlpipe(dev, 0),
1859 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1860 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1861 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
1862 buf, 0, WDR_TIMEOUT) < 0) {
1863 err("urb failed to set to rts/cts flow control");
1870 * Check the IXOFF status in the iflag component of the termios structure
1871 * if IXOFF is not set, the pre-xon/xoff code is executed.
1873 if (iflag & IXOFF) {
1874 dbg("%s request to enable xonxoff iflag=%04x",__func__,iflag);
1875 // Try to enable the XON/XOFF on the ftdi_sio
1876 // Set the vstart and vstop -- could have been done up above where
1877 // a lot of other dereferencing is done but that would be very
1878 // inefficient as vstart and vstop are not always needed
1879 vstart = termios->c_cc[VSTART];
1880 vstop = termios->c_cc[VSTOP];
1881 urb_value=(vstop << 8) | (vstart);
1883 if (usb_control_msg(dev,
1884 usb_sndctrlpipe(dev, 0),
1885 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1886 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1887 urb_value , (FTDI_SIO_XON_XOFF_HS
1889 buf, 0, WDR_TIMEOUT) < 0) {
1890 err("urb failed to set to xon/xoff flow control");
1893 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */
1894 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */
1895 dbg("%s Turning off hardware flow control", __func__);
1896 if (usb_control_msg(dev,
1897 usb_sndctrlpipe(dev, 0),
1898 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1899 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1901 buf, 0, WDR_TIMEOUT) < 0) {
1902 err("urb failed to clear flow control");
1908 } /* ftdi_termios */
1911 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file)
1913 struct ftdi_private *priv = usb_get_serial_port_data(port);
1914 unsigned char buf[2];
1917 dbg("%s TIOCMGET", __func__);
1918 switch (priv->chip_type) {
1920 /* Request the status from the device */
1921 if ((ret = usb_control_msg(port->serial->dev,
1922 usb_rcvctrlpipe(port->serial->dev, 0),
1923 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1924 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
1926 buf, 1, WDR_TIMEOUT)) < 0 ) {
1927 err("%s Could not get modem status of device - err: %d", __func__,
1936 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same
1937 format as the data returned from the in point */
1938 if ((ret = usb_control_msg(port->serial->dev,
1939 usb_rcvctrlpipe(port->serial->dev, 0),
1940 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1941 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
1943 buf, 2, WDR_TIMEOUT)) < 0 ) {
1944 err("%s Could not get modem status of device - err: %d", __func__,
1954 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
1955 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
1956 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) |
1957 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) |
1961 static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear)
1963 dbg("%s TIOCMSET", __func__);
1964 return update_mctrl(port, set, clear);
1968 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
1970 struct ftdi_private *priv = usb_get_serial_port_data(port);
1972 dbg("%s cmd 0x%04x", __func__, cmd);
1974 /* Based on code from acm.c and others */
1977 case TIOCGSERIAL: /* gets serial port data */
1978 return get_serial_info(port, (struct serial_struct __user *) arg);
1980 case TIOCSSERIAL: /* sets serial port data */
1981 return set_serial_info(port, (struct serial_struct __user *) arg);
1984 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1985 * - mask passed in arg for lines of interest
1986 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1987 * Caller should use TIOCGICOUNT to see which one it was.
1989 * This code is borrowed from linux/drivers/char/serial.c
1992 while (priv != NULL) {
1993 interruptible_sleep_on(&priv->delta_msr_wait);
1994 /* see if a signal did it */
1995 if (signal_pending(current))
1996 return -ERESTARTSYS;
1998 char diff = priv->diff_status;
2001 return -EIO; /* no change => error */
2004 /* Consume all events */
2005 priv->diff_status = 0;
2007 /* Return 0 if caller wanted to know about these bits */
2008 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
2009 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
2010 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) ||
2011 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) {
2015 * Otherwise caller can't care less about what happened,
2016 * and so we continue to wait for more events.
2028 /* This is not necessarily an error - turns out the higher layers will do
2029 * some ioctls itself (see comment above)
2031 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __func__, cmd);
2033 return(-ENOIOCTLCMD);
2037 static void ftdi_throttle (struct usb_serial_port *port)
2039 struct ftdi_private *priv = usb_get_serial_port_data(port);
2040 unsigned long flags;
2042 dbg("%s - port %d", __func__, port->number);
2044 spin_lock_irqsave(&priv->rx_lock, flags);
2045 priv->rx_flags |= THROTTLED;
2046 spin_unlock_irqrestore(&priv->rx_lock, flags);
2050 static void ftdi_unthrottle (struct usb_serial_port *port)
2052 struct ftdi_private *priv = usb_get_serial_port_data(port);
2053 int actually_throttled;
2054 unsigned long flags;
2056 dbg("%s - port %d", __func__, port->number);
2058 spin_lock_irqsave(&priv->rx_lock, flags);
2059 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
2060 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
2061 spin_unlock_irqrestore(&priv->rx_lock, flags);
2063 if (actually_throttled)
2064 schedule_delayed_work(&priv->rx_work, 0);
2067 static int __init ftdi_init (void)
2071 dbg("%s", __func__);
2072 if (vendor > 0 && product > 0) {
2073 /* Add user specified VID/PID to reserved element of table. */
2075 for (i = 0; id_table_combined[i].idVendor; i++)
2077 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
2078 id_table_combined[i].idVendor = vendor;
2079 id_table_combined[i].idProduct = product;
2081 retval = usb_serial_register(&ftdi_sio_device);
2083 goto failed_sio_register;
2084 retval = usb_register(&ftdi_driver);
2086 goto failed_usb_register;
2088 info(DRIVER_VERSION ":" DRIVER_DESC);
2090 failed_usb_register:
2091 usb_serial_deregister(&ftdi_sio_device);
2092 failed_sio_register:
2097 static void __exit ftdi_exit (void)
2100 dbg("%s", __func__);
2102 usb_deregister (&ftdi_driver);
2103 usb_serial_deregister (&ftdi_sio_device);
2108 module_init(ftdi_init);
2109 module_exit(ftdi_exit);
2111 MODULE_AUTHOR( DRIVER_AUTHOR );
2112 MODULE_DESCRIPTION( DRIVER_DESC );
2113 MODULE_LICENSE("GPL");
2115 module_param(debug, bool, S_IRUGO | S_IWUSR);
2116 MODULE_PARM_DESC(debug, "Debug enabled or not");
2117 module_param(vendor, ushort, 0);
2118 MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
2119 __MODULE_STRING(FTDI_VID)")");
2120 module_param(product, ushort, 0);
2121 MODULE_PARM_DESC(vendor, "User specified product ID");