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_ACTZWAVE_PID) },
137 { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) },
138 { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) },
139 { USB_DEVICE(FTDI_VID, FTDI_IPLUS2_PID) },
140 { USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) },
141 { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
142 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
143 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
144 { USB_DEVICE(FTDI_VID, FTDI_232RL_PID) },
145 { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
146 { USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
147 { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
148 { USB_DEVICE(FTDI_VID, FTDI_OPENDCC_PID) },
149 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
150 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
151 { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
152 { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
153 { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
154 { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
155 { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
156 { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
157 { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
158 { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
159 { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
160 { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
161 { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
162 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
163 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
164 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
165 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
166 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
167 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
168 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
169 { USB_DEVICE(MTXORB_VK_VID, MTXORB_VK_PID),
170 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
171 { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
172 { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
173 { USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
174 { USB_DEVICE(FTDI_VID, FTDI_USBX_707_PID) },
175 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
176 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
177 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
178 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
179 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) },
180 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
181 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
182 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
183 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
184 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
185 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
186 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
187 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
188 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
189 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
190 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
191 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
192 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
193 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
194 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
195 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
196 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
197 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
198 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
199 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
200 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
201 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
202 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
203 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
204 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
205 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
206 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
207 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
208 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
209 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
210 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
211 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
212 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
213 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
214 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
215 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
216 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
217 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
218 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
219 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
220 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
221 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
222 { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
223 { USB_DEVICE(OCT_VID, OCT_US101_PID) },
224 { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
225 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
226 { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
227 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
228 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
229 { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
230 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
231 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
232 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
233 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
234 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
235 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
236 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
237 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
238 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
239 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
240 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
241 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
242 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
243 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
244 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
245 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
246 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
247 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
248 { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) },
249 { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
250 { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
251 { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
252 { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
253 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
254 { USB_DEVICE(FTDI_VID, FTDI_IBS_US485_PID) },
255 { USB_DEVICE(FTDI_VID, FTDI_IBS_PICPRO_PID) },
256 { USB_DEVICE(FTDI_VID, FTDI_IBS_PCMCIA_PID) },
257 { USB_DEVICE(FTDI_VID, FTDI_IBS_PK1_PID) },
258 { USB_DEVICE(FTDI_VID, FTDI_IBS_RS232MON_PID) },
259 { USB_DEVICE(FTDI_VID, FTDI_IBS_APP70_PID) },
260 { USB_DEVICE(FTDI_VID, FTDI_IBS_PEDO_PID) },
261 { USB_DEVICE(FTDI_VID, FTDI_IBS_PROD_PID) },
263 * Due to many user requests for multiple ELV devices we enable
266 { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) },
267 { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) },
268 { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) },
269 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) },
270 { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) },
271 { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) },
272 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) },
273 { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) },
274 { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) },
275 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) },
276 { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) },
277 { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) },
278 { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) },
279 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) },
280 { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) },
281 { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) },
282 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) },
283 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) },
284 { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1010PC_PID) },
285 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) },
286 { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
287 { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
288 { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
289 { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
290 { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
291 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
292 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
293 { USB_DEVICE(FTDI_VID, FTDI_CCSMACHX_2_PID) },
294 { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
295 { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
296 { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
297 { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
298 { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
299 { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) },
300 { USB_DEVICE(TTI_VID, TTI_QL355P_PID) },
301 { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
302 { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
303 { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
304 { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
305 { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
306 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
307 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
308 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
309 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
310 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
311 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
312 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
313 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
314 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
315 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
316 { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
317 { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
318 { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) },
319 { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) },
320 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
321 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
322 { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) },
323 { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) },
324 { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) },
325 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) },
326 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
327 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
328 { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
329 { USB_DEVICE(EVOLUTION_VID, EVO_HYBRID_PID) },
330 { USB_DEVICE(EVOLUTION_VID, EVO_RCM4_PID) },
331 { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
332 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
333 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
334 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
335 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
336 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16IC_PID) },
337 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
338 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
339 { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
340 { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
341 { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) },
342 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
343 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
344 { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
345 { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
346 { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
347 { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
348 { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
349 { USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
350 { USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
351 { USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
352 { USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
353 { USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
354 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) },
355 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) },
356 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) },
357 { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) },
358 { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) },
359 { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) },
360 { USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) },
361 { USB_DEVICE(FTDI_VID, FTDI_ELSTER_UNICOM_PID) },
362 { USB_DEVICE(FTDI_VID, FTDI_PROPOX_JTAGCABLEII_PID) },
363 { USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID),
364 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
365 { USB_DEVICE(FIC_VID, FIC_NEO1973_DEBUG_PID),
366 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
367 { USB_DEVICE(FTDI_VID, FTDI_OOCDLINK_PID),
368 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
369 { }, /* Optional parameter entry */
370 { } /* Terminating entry */
373 MODULE_DEVICE_TABLE (usb, id_table_combined);
375 static struct usb_driver ftdi_driver = {
377 .probe = usb_serial_probe,
378 .disconnect = usb_serial_disconnect,
379 .id_table = id_table_combined,
383 static const char *ftdi_chip_name[] = {
384 [SIO] = "SIO", /* the serial part of FT8U100AX */
385 [FT8U232AM] = "FT8U232AM",
386 [FT232BM] = "FT232BM",
387 [FT2232C] = "FT2232C",
388 [FT232RL] = "FT232RL",
392 /* Constants for read urb and write urb */
397 #define THROTTLED 0x01
398 #define ACTUALLY_THROTTLED 0x02
400 /* Used for TIOCMIWAIT */
401 #define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
402 #define FTDI_STATUS_B1_MASK (FTDI_RS_BI)
405 #define FTDI_IMPL_ASYNC_FLAGS = (ASYNC_SPD_HI | ASYNC_SPD_VHI \
406 | ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP)
408 /* function prototypes for a FTDI serial converter */
409 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id);
410 static void ftdi_shutdown (struct usb_serial *serial);
411 static int ftdi_sio_port_probe (struct usb_serial_port *port);
412 static int ftdi_sio_port_remove (struct usb_serial_port *port);
413 static int ftdi_open (struct usb_serial_port *port, struct file *filp);
414 static void ftdi_close (struct usb_serial_port *port, struct file *filp);
415 static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count);
416 static int ftdi_write_room (struct usb_serial_port *port);
417 static int ftdi_chars_in_buffer (struct usb_serial_port *port);
418 static void ftdi_write_bulk_callback (struct urb *urb);
419 static void ftdi_read_bulk_callback (struct urb *urb);
420 static void ftdi_process_read (struct work_struct *work);
421 static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios * old);
422 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file);
423 static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear);
424 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
425 static void ftdi_break_ctl (struct usb_serial_port *port, int break_state );
426 static void ftdi_throttle (struct usb_serial_port *port);
427 static void ftdi_unthrottle (struct usb_serial_port *port);
429 static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base);
430 static unsigned short int ftdi_232am_baud_to_divisor (int baud);
431 static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base);
432 static __u32 ftdi_232bm_baud_to_divisor (int baud);
434 static struct usb_serial_driver ftdi_sio_device = {
436 .owner = THIS_MODULE,
439 .description = "FTDI USB Serial Device",
440 .usb_driver = &ftdi_driver ,
441 .id_table = id_table_combined,
443 .probe = ftdi_sio_probe,
444 .port_probe = ftdi_sio_port_probe,
445 .port_remove = ftdi_sio_port_remove,
448 .throttle = ftdi_throttle,
449 .unthrottle = ftdi_unthrottle,
451 .write_room = ftdi_write_room,
452 .chars_in_buffer = ftdi_chars_in_buffer,
453 .read_bulk_callback = ftdi_read_bulk_callback,
454 .write_bulk_callback = ftdi_write_bulk_callback,
455 .tiocmget = ftdi_tiocmget,
456 .tiocmset = ftdi_tiocmset,
458 .set_termios = ftdi_set_termios,
459 .break_ctl = ftdi_break_ctl,
460 .shutdown = ftdi_shutdown,
464 #define WDR_TIMEOUT 5000 /* default urb timeout */
465 #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
467 /* High and low are for DTR, RTS etc etc */
471 /* number of outstanding urbs to prevent userspace DoS from happening */
472 #define URB_UPPER_LIMIT 42
475 * ***************************************************************************
477 * ***************************************************************************
480 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
482 unsigned short int divisor;
483 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
484 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1
485 divisor = divisor3 >> 3;
487 if (divisor3 == 1) divisor |= 0xc000; else // 0.125
488 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5
489 if (divisor3 != 0) divisor |= 0x8000; // 0.25
490 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */
494 static unsigned short int ftdi_232am_baud_to_divisor(int baud)
496 return(ftdi_232am_baud_base_to_divisor(baud, 48000000));
499 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
501 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
503 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
504 divisor = divisor3 >> 3;
505 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
506 /* Deal with special cases for highest baud rates. */
507 if (divisor == 1) divisor = 0; else // 1.0
508 if (divisor == 0x4001) divisor = 1; // 1.5
512 static __u32 ftdi_232bm_baud_to_divisor(int baud)
514 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000));
517 #define set_mctrl(port, set) update_mctrl((port), (set), 0)
518 #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear))
520 static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear)
522 struct ftdi_private *priv = usb_get_serial_port_data(port);
527 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
528 dbg("%s - DTR|RTS not being set|cleared", __func__);
529 return 0; /* no change */
532 buf = kmalloc(1, GFP_NOIO);
536 clear &= ~set; /* 'set' takes precedence over 'clear' */
538 if (clear & TIOCM_DTR)
539 urb_value |= FTDI_SIO_SET_DTR_LOW;
540 if (clear & TIOCM_RTS)
541 urb_value |= FTDI_SIO_SET_RTS_LOW;
543 urb_value |= FTDI_SIO_SET_DTR_HIGH;
545 urb_value |= FTDI_SIO_SET_RTS_HIGH;
546 rv = usb_control_msg(port->serial->dev,
547 usb_sndctrlpipe(port->serial->dev, 0),
548 FTDI_SIO_SET_MODEM_CTRL_REQUEST,
549 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
550 urb_value, priv->interface,
551 buf, 0, WDR_TIMEOUT);
555 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
557 (set & TIOCM_DTR) ? "HIGH" :
558 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
559 (set & TIOCM_RTS) ? "HIGH" :
560 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
562 dbg("%s - DTR %s, RTS %s", __func__,
563 (set & TIOCM_DTR) ? "HIGH" :
564 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
565 (set & TIOCM_RTS) ? "HIGH" :
566 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
567 /* FIXME: locking on last_dtr_rts */
568 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
574 static __u32 get_ftdi_divisor(struct usb_serial_port * port);
577 static int change_speed(struct usb_serial_port *port)
579 struct ftdi_private *priv = usb_get_serial_port_data(port);
583 __u32 urb_index_value;
586 buf = kmalloc(1, GFP_NOIO);
590 urb_index_value = get_ftdi_divisor(port);
591 urb_value = (__u16)urb_index_value;
592 urb_index = (__u16)(urb_index_value >> 16);
593 if (priv->interface) { /* FT2232C */
594 urb_index = (__u16)((urb_index << 8) | priv->interface);
597 rv = usb_control_msg(port->serial->dev,
598 usb_sndctrlpipe(port->serial->dev, 0),
599 FTDI_SIO_SET_BAUDRATE_REQUEST,
600 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
601 urb_value, urb_index,
602 buf, 0, WDR_SHORT_TIMEOUT);
609 static __u32 get_ftdi_divisor(struct usb_serial_port * port)
610 { /* get_ftdi_divisor */
611 struct ftdi_private *priv = usb_get_serial_port_data(port);
617 * The logic involved in setting the baudrate can be cleanly split in 3 steps.
618 * Obtaining the actual baud rate is a little tricky since unix traditionally
619 * somehow ignored the possibility to set non-standard baud rates.
620 * 1. Standard baud rates are set in tty->termios->c_cflag
621 * 2. If these are not enough, you can set any speed using alt_speed as follows:
622 * - set tty->termios->c_cflag speed to B38400
623 * - set your real speed in tty->alt_speed; it gets ignored when
625 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
626 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just
627 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800)
628 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate
629 * 3. You can also set baud rate by setting custom divisor as follows
630 * - set tty->termios->c_cflag speed to B38400
631 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
632 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
633 * o custom_divisor set to baud_base / your_new_baudrate
634 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really
635 * spend some time and separate+move this common code to serial.c, it is
636 * replicated in nearly every serial driver you see.
639 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */
641 baud = tty_get_baud_rate(port->tty);
642 dbg("%s - tty_get_baud_rate reports speed %d", __func__, baud);
644 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */
647 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
648 (priv->custom_divisor)) {
649 baud = priv->baud_base / priv->custom_divisor;
650 dbg("%s - custom divisor %d sets baud rate to %d", __func__, priv->custom_divisor, baud);
653 /* 3. Convert baudrate to device-specific divisor */
655 if (!baud) baud = 9600;
656 switch(priv->chip_type) {
657 case SIO: /* SIO chip */
659 case 300: div_value = ftdi_sio_b300; break;
660 case 600: div_value = ftdi_sio_b600; break;
661 case 1200: div_value = ftdi_sio_b1200; break;
662 case 2400: div_value = ftdi_sio_b2400; break;
663 case 4800: div_value = ftdi_sio_b4800; break;
664 case 9600: div_value = ftdi_sio_b9600; break;
665 case 19200: div_value = ftdi_sio_b19200; break;
666 case 38400: div_value = ftdi_sio_b38400; break;
667 case 57600: div_value = ftdi_sio_b57600; break;
668 case 115200: div_value = ftdi_sio_b115200; break;
670 if (div_value == 0) {
671 dbg("%s - Baudrate (%d) requested is not supported", __func__, baud);
672 div_value = ftdi_sio_b9600;
677 case FT8U232AM: /* 8U232AM chip */
678 if (baud <= 3000000) {
679 div_value = ftdi_232am_baud_to_divisor(baud);
681 dbg("%s - Baud rate too high!", __func__);
683 div_value = ftdi_232am_baud_to_divisor(9600);
687 case FT232BM: /* FT232BM chip */
688 case FT2232C: /* FT2232C chip */
690 if (baud <= 3000000) {
691 div_value = ftdi_232bm_baud_to_divisor(baud);
693 dbg("%s - Baud rate too high!", __func__);
694 div_value = ftdi_232bm_baud_to_divisor(9600);
699 } /* priv->chip_type */
702 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
703 __func__, baud, (unsigned long)div_value,
704 ftdi_chip_name[priv->chip_type]);
707 tty_encode_baud_rate(port->tty, baud, baud);
712 static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo)
714 struct ftdi_private *priv = usb_get_serial_port_data(port);
715 struct serial_struct tmp;
719 memset(&tmp, 0, sizeof(tmp));
720 tmp.flags = priv->flags;
721 tmp.baud_base = priv->baud_base;
722 tmp.custom_divisor = priv->custom_divisor;
723 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
726 } /* get_serial_info */
729 static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo)
730 { /* set_serial_info */
731 struct ftdi_private *priv = usb_get_serial_port_data(port);
732 struct serial_struct new_serial;
733 struct ftdi_private old_priv;
735 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
739 /* Do error checking and permission checking */
741 if (!capable(CAP_SYS_ADMIN)) {
742 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
743 (priv->flags & ~ASYNC_USR_MASK)))
745 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
746 (new_serial.flags & ASYNC_USR_MASK));
747 priv->custom_divisor = new_serial.custom_divisor;
751 if ((new_serial.baud_base != priv->baud_base) &&
752 (new_serial.baud_base < 9600))
755 /* Make the changes - these are privileged changes! */
757 priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
758 (new_serial.flags & ASYNC_FLAGS));
759 priv->custom_divisor = new_serial.custom_divisor;
761 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
764 if ((old_priv.flags & ASYNC_SPD_MASK) !=
765 (priv->flags & ASYNC_SPD_MASK)) {
766 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
767 port->tty->alt_speed = 57600;
768 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
769 port->tty->alt_speed = 115200;
770 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
771 port->tty->alt_speed = 230400;
772 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
773 port->tty->alt_speed = 460800;
775 port->tty->alt_speed = 0;
777 if (((old_priv.flags & ASYNC_SPD_MASK) !=
778 (priv->flags & ASYNC_SPD_MASK)) ||
779 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
780 (old_priv.custom_divisor != priv->custom_divisor))) {
786 } /* set_serial_info */
789 /* Determine type of FTDI chip based on USB config and descriptor. */
790 static void ftdi_determine_type(struct usb_serial_port *port)
792 struct ftdi_private *priv = usb_get_serial_port_data(port);
793 struct usb_serial *serial = port->serial;
794 struct usb_device *udev = serial->dev;
798 /* Assume it is not the original SIO device for now. */
799 priv->baud_base = 48000000 / 2;
800 priv->write_offset = 0;
802 version = le16_to_cpu(udev->descriptor.bcdDevice);
803 interfaces = udev->actconfig->desc.bNumInterfaces;
804 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __func__,
805 version, interfaces);
806 if (interfaces > 1) {
809 /* Multiple interfaces. Assume FT2232C. */
810 priv->chip_type = FT2232C;
811 /* Determine interface code. */
812 inter = serial->interface->altsetting->desc.bInterfaceNumber;
814 priv->interface = PIT_SIOA;
816 priv->interface = PIT_SIOB;
818 /* BM-type devices have a bug where bcdDevice gets set
819 * to 0x200 when iSerialNumber is 0. */
820 if (version < 0x500) {
821 dbg("%s: something fishy - bcdDevice too low for multi-interface device",
824 } else if (version < 0x200) {
825 /* Old device. Assume its the original SIO. */
826 priv->chip_type = SIO;
827 priv->baud_base = 12000000 / 16;
828 priv->write_offset = 1;
829 } else if (version < 0x400) {
830 /* Assume its an FT8U232AM (or FT8U245AM) */
831 /* (It might be a BM because of the iSerialNumber bug,
832 * but it will still work as an AM device.) */
833 priv->chip_type = FT8U232AM;
834 } else if (version < 0x600) {
835 /* Assume its an FT232BM (or FT245BM) */
836 priv->chip_type = FT232BM;
838 /* Assume its an FT232R */
839 priv->chip_type = FT232RL;
841 info("Detected %s", ftdi_chip_name[priv->chip_type]);
846 * ***************************************************************************
848 * ***************************************************************************
851 static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf)
853 struct usb_serial_port *port = to_usb_serial_port(dev);
854 struct ftdi_private *priv = usb_get_serial_port_data(port);
855 struct usb_device *udev = port->serial->dev;
856 unsigned short latency = 0;
862 rv = usb_control_msg(udev,
863 usb_rcvctrlpipe(udev, 0),
864 FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
865 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
867 (char*) &latency, 1, WDR_TIMEOUT);
870 dev_err(dev, "Unable to read latency timer: %i\n", rv);
873 return sprintf(buf, "%i\n", latency);
876 /* Write a new value of the latency timer, in units of milliseconds. */
877 static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf,
880 struct usb_serial_port *port = to_usb_serial_port(dev);
881 struct ftdi_private *priv = usb_get_serial_port_data(port);
882 struct usb_device *udev = port->serial->dev;
884 int v = simple_strtoul(valbuf, NULL, 10);
887 dbg("%s: setting latency timer = %i", __func__, v);
889 rv = usb_control_msg(udev,
890 usb_sndctrlpipe(udev, 0),
891 FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
892 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
894 buf, 0, WDR_TIMEOUT);
897 dev_err(dev, "Unable to write latency timer: %i\n", rv);
904 /* Write an event character directly to the FTDI register. The ASCII
905 value is in the low 8 bits, with the enable bit in the 9th bit. */
906 static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf,
909 struct usb_serial_port *port = to_usb_serial_port(dev);
910 struct ftdi_private *priv = usb_get_serial_port_data(port);
911 struct usb_device *udev = port->serial->dev;
913 int v = simple_strtoul(valbuf, NULL, 10);
916 dbg("%s: setting event char = %i", __func__, v);
918 rv = usb_control_msg(udev,
919 usb_sndctrlpipe(udev, 0),
920 FTDI_SIO_SET_EVENT_CHAR_REQUEST,
921 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE,
923 buf, 0, WDR_TIMEOUT);
926 dbg("Unable to write event character: %i", rv);
933 static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer);
934 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);
936 static int create_sysfs_attrs(struct usb_serial_port *port)
938 struct ftdi_private *priv = usb_get_serial_port_data(port);
943 /* XXX I've no idea if the original SIO supports the event_char
944 * sysfs parameter, so I'm playing it safe. */
945 if (priv->chip_type != SIO) {
946 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]);
947 retval = device_create_file(&port->dev, &dev_attr_event_char);
949 (priv->chip_type == FT232BM ||
950 priv->chip_type == FT2232C ||
951 priv->chip_type == FT232RL)) {
952 retval = device_create_file(&port->dev,
953 &dev_attr_latency_timer);
959 static void remove_sysfs_attrs(struct usb_serial_port *port)
961 struct ftdi_private *priv = usb_get_serial_port_data(port);
965 /* XXX see create_sysfs_attrs */
966 if (priv->chip_type != SIO) {
967 device_remove_file(&port->dev, &dev_attr_event_char);
968 if (priv->chip_type == FT232BM ||
969 priv->chip_type == FT2232C ||
970 priv->chip_type == FT232RL) {
971 device_remove_file(&port->dev, &dev_attr_latency_timer);
978 * ***************************************************************************
979 * FTDI driver specific functions
980 * ***************************************************************************
983 /* Probe function to check for special devices */
984 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id)
986 struct ftdi_sio_quirk *quirk = (struct ftdi_sio_quirk *)id->driver_info;
988 if (quirk && quirk->probe) {
989 int ret = quirk->probe(serial);
994 usb_set_serial_data(serial, (void *)id->driver_info);
999 static int ftdi_sio_port_probe(struct usb_serial_port *port)
1001 struct ftdi_private *priv;
1002 struct ftdi_sio_quirk *quirk = usb_get_serial_data(port->serial);
1007 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL);
1009 err("%s- kmalloc(%Zd) failed.", __func__, sizeof(struct ftdi_private));
1013 spin_lock_init(&priv->rx_lock);
1014 spin_lock_init(&priv->tx_lock);
1015 init_waitqueue_head(&priv->delta_msr_wait);
1016 /* This will push the characters through immediately rather
1017 than queue a task to deliver them */
1018 priv->flags = ASYNC_LOW_LATENCY;
1020 if (quirk && quirk->port_probe)
1021 quirk->port_probe(priv);
1023 /* Increase the size of read buffers */
1024 kfree(port->bulk_in_buffer);
1025 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL);
1026 if (!port->bulk_in_buffer) {
1030 if (port->read_urb) {
1031 port->read_urb->transfer_buffer = port->bulk_in_buffer;
1032 port->read_urb->transfer_buffer_length = BUFSZ;
1035 INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read);
1038 /* Free port's existing write urb and transfer buffer. */
1039 if (port->write_urb) {
1040 usb_free_urb (port->write_urb);
1041 port->write_urb = NULL;
1043 kfree(port->bulk_out_buffer);
1044 port->bulk_out_buffer = NULL;
1046 usb_set_serial_port_data(port, priv);
1048 ftdi_determine_type (port);
1049 create_sysfs_attrs(port);
1053 /* Setup for the USB-UIRT device, which requires hardwired
1054 * baudrate (38400 gets mapped to 312500) */
1055 /* Called from usbserial:serial_probe */
1056 static void ftdi_USB_UIRT_setup (struct ftdi_private *priv)
1060 priv->flags |= ASYNC_SPD_CUST;
1061 priv->custom_divisor = 77;
1062 priv->force_baud = 38400;
1063 } /* ftdi_USB_UIRT_setup */
1065 /* Setup for the HE-TIRA1 device, which requires hardwired
1066 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */
1067 static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv)
1071 priv->flags |= ASYNC_SPD_CUST;
1072 priv->custom_divisor = 240;
1073 priv->force_baud = 38400;
1074 priv->force_rtscts = 1;
1075 } /* ftdi_HE_TIRA1_setup */
1078 * First port on JTAG adaptors such as Olimex arm-usb-ocd or the FIC/OpenMoko
1079 * Neo1973 Debug Board is reserved for JTAG interface and can be accessed from
1080 * userspace using openocd.
1082 static int ftdi_jtag_probe(struct usb_serial *serial)
1084 struct usb_device *udev = serial->dev;
1085 struct usb_interface *interface = serial->interface;
1089 if (interface == udev->actconfig->interface[0]) {
1090 info("Ignoring serial port reserved for JTAG");
1098 * The Matrix Orbital VK204-25-USB has an invalid IN endpoint.
1099 * We have to correct it if we want to read from it.
1101 static int ftdi_mtxorb_hack_setup(struct usb_serial *serial)
1103 struct usb_host_endpoint *ep = serial->dev->ep_in[1];
1104 struct usb_endpoint_descriptor *ep_desc = &ep->desc;
1106 if (ep->enabled && ep_desc->wMaxPacketSize == 0) {
1107 ep_desc->wMaxPacketSize = 0x40;
1108 info("Fixing invalid wMaxPacketSize on read pipe");
1114 /* ftdi_shutdown is called from usbserial:usb_serial_disconnect
1115 * it is called when the usb device is disconnected
1117 * usbserial:usb_serial_disconnect
1118 * calls __serial_close for each open of the port
1119 * shutdown is called then (ie ftdi_shutdown)
1121 static void ftdi_shutdown (struct usb_serial *serial)
1123 dbg("%s", __func__);
1126 static int ftdi_sio_port_remove(struct usb_serial_port *port)
1128 struct ftdi_private *priv = usb_get_serial_port_data(port);
1130 dbg("%s", __func__);
1132 remove_sysfs_attrs(port);
1134 /* all open ports are closed at this point
1135 * (by usbserial.c:__serial_close, which calls ftdi_close)
1139 usb_set_serial_port_data(port, NULL);
1146 static int ftdi_open (struct usb_serial_port *port, struct file *filp)
1148 struct usb_device *dev = port->serial->dev;
1149 struct ftdi_private *priv = usb_get_serial_port_data(port);
1150 unsigned long flags;
1153 char buf[1]; /* Needed for the usb_control_msg I think */
1155 dbg("%s", __func__);
1157 spin_lock_irqsave(&priv->tx_lock, flags);
1159 spin_unlock_irqrestore(&priv->tx_lock, flags);
1160 spin_lock_irqsave(&priv->rx_lock, flags);
1162 spin_unlock_irqrestore(&priv->rx_lock, flags);
1165 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1167 /* No error checking for this (will get errors later anyway) */
1168 /* See ftdi_sio.h for description of what is reset */
1169 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1170 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
1172 priv->interface, buf, 0, WDR_TIMEOUT);
1174 /* Termios defaults are set by usb_serial_init. We don't change
1175 port->tty->termios - this would loose speed settings, etc.
1176 This is same behaviour as serial.c/rs_open() - Kuba */
1178 /* ftdi_set_termios will send usb control messages */
1180 ftdi_set_termios(port, port->tty->termios);
1182 /* FIXME: Flow control might be enabled, so it should be checked -
1183 we have no control of defaults! */
1184 /* Turn on RTS and DTR since we are not flow controlling by default */
1185 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1188 spin_lock_irqsave(&priv->rx_lock, flags);
1189 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
1190 spin_unlock_irqrestore(&priv->rx_lock, flags);
1192 /* Start reading from the device */
1193 priv->rx_processed = 0;
1194 usb_fill_bulk_urb(port->read_urb, dev,
1195 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
1196 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1197 ftdi_read_bulk_callback, port);
1198 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
1200 err("%s - failed submitting read urb, error %d", __func__, result);
1209 * usbserial:__serial_close only calls ftdi_close if the point is open
1211 * This only gets called when it is the last close
1216 static void ftdi_close (struct usb_serial_port *port, struct file *filp)
1218 unsigned int c_cflag = port->tty->termios->c_cflag;
1219 struct ftdi_private *priv = usb_get_serial_port_data(port);
1222 dbg("%s", __func__);
1224 mutex_lock(&port->serial->disc_mutex);
1225 if (c_cflag & HUPCL && !port->serial->disconnected){
1226 /* Disable flow control */
1227 if (usb_control_msg(port->serial->dev,
1228 usb_sndctrlpipe(port->serial->dev, 0),
1229 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1230 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1231 0, priv->interface, buf, 0,
1233 err("error from flowcontrol urb");
1236 /* drop RTS and DTR */
1237 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1238 } /* Note change no line if hupcl is off */
1239 mutex_unlock(&port->serial->disc_mutex);
1241 /* cancel any scheduled reading */
1242 cancel_delayed_work(&priv->rx_work);
1243 flush_scheduled_work();
1245 /* shutdown our bulk read */
1246 usb_kill_urb(port->read_urb);
1251 /* The SIO requires the first byte to have:
1254 * B2..7 length of message excluding byte 0
1256 * The new devices do not require this byte
1258 static int ftdi_write (struct usb_serial_port *port,
1259 const unsigned char *buf, int count)
1261 struct ftdi_private *priv = usb_get_serial_port_data(port);
1263 unsigned char *buffer;
1264 int data_offset ; /* will be 1 for the SIO and 0 otherwise */
1267 unsigned long flags;
1269 dbg("%s port %d, %d bytes", __func__, port->number, count);
1272 dbg("write request of 0 bytes");
1275 spin_lock_irqsave(&priv->tx_lock, flags);
1276 if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) {
1277 spin_unlock_irqrestore(&priv->tx_lock, flags);
1278 dbg("%s - write limit hit\n", __func__);
1281 priv->tx_outstanding_urbs++;
1282 spin_unlock_irqrestore(&priv->tx_lock, flags);
1284 data_offset = priv->write_offset;
1285 dbg("data_offset set to %d",data_offset);
1287 /* Determine total transfer size */
1288 transfer_size = count;
1289 if (data_offset > 0) {
1290 /* Original sio needs control bytes too... */
1291 transfer_size += (data_offset *
1292 ((count + (PKTSZ - 1 - data_offset)) /
1293 (PKTSZ - data_offset)));
1296 buffer = kmalloc (transfer_size, GFP_ATOMIC);
1298 err("%s ran out of kernel memory for urb ...", __func__);
1300 goto error_no_buffer;
1303 urb = usb_alloc_urb(0, GFP_ATOMIC);
1305 err("%s - no more free urbs", __func__);
1311 if (data_offset > 0) {
1312 /* Original sio requires control byte at start of each packet. */
1313 int user_pktsz = PKTSZ - data_offset;
1315 unsigned char *first_byte = buffer;
1316 const unsigned char *current_position = buf;
1319 if (user_pktsz > todo) {
1322 /* Write the control byte at the front of the packet*/
1323 *first_byte = 1 | ((user_pktsz) << 2);
1324 /* Copy data for packet */
1325 memcpy (first_byte + data_offset,
1326 current_position, user_pktsz);
1327 first_byte += user_pktsz + data_offset;
1328 current_position += user_pktsz;
1332 /* No control byte required. */
1333 /* Copy in the data to send */
1334 memcpy (buffer, buf, count);
1337 usb_serial_debug_data(debug, &port->dev, __func__, transfer_size, buffer);
1339 /* fill the buffer and send it */
1340 usb_fill_bulk_urb(urb, port->serial->dev,
1341 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
1342 buffer, transfer_size,
1343 ftdi_write_bulk_callback, port);
1345 status = usb_submit_urb(urb, GFP_ATOMIC);
1347 err("%s - failed submitting write urb, error %d", __func__, status);
1351 spin_lock_irqsave(&priv->tx_lock, flags);
1352 priv->tx_outstanding_bytes += count;
1353 priv->tx_bytes += count;
1354 spin_unlock_irqrestore(&priv->tx_lock, flags);
1357 /* we are done with this urb, so let the host driver
1358 * really free it when it is finished with it */
1361 dbg("%s write returning: %d", __func__, count);
1368 spin_lock_irqsave(&priv->tx_lock, flags);
1369 priv->tx_outstanding_urbs--;
1370 spin_unlock_irqrestore(&priv->tx_lock, flags);
1375 /* This function may get called when the device is closed */
1377 static void ftdi_write_bulk_callback (struct urb *urb)
1379 unsigned long flags;
1380 struct usb_serial_port *port = urb->context;
1381 struct ftdi_private *priv;
1382 int data_offset; /* will be 1 for the SIO and 0 otherwise */
1383 unsigned long countback;
1384 int status = urb->status;
1386 /* free up the transfer buffer, as usb_free_urb() does not do this */
1387 kfree (urb->transfer_buffer);
1389 dbg("%s - port %d", __func__, port->number);
1392 dbg("nonzero write bulk status received: %d", status);
1396 priv = usb_get_serial_port_data(port);
1398 dbg("%s - bad port private data pointer - exiting", __func__);
1401 /* account for transferred data */
1402 countback = urb->actual_length;
1403 data_offset = priv->write_offset;
1404 if (data_offset > 0) {
1405 /* Subtract the control bytes */
1406 countback -= (data_offset * DIV_ROUND_UP(countback, PKTSZ));
1408 spin_lock_irqsave(&priv->tx_lock, flags);
1409 --priv->tx_outstanding_urbs;
1410 priv->tx_outstanding_bytes -= countback;
1411 spin_unlock_irqrestore(&priv->tx_lock, flags);
1413 usb_serial_port_softint(port);
1414 } /* ftdi_write_bulk_callback */
1417 static int ftdi_write_room( struct usb_serial_port *port )
1419 struct ftdi_private *priv = usb_get_serial_port_data(port);
1421 unsigned long flags;
1423 dbg("%s - port %d", __func__, port->number);
1425 spin_lock_irqsave(&priv->tx_lock, flags);
1426 if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) {
1428 * We really can take anything the user throws at us
1429 * but let's pick a nice big number to tell the tty
1430 * layer that we have lots of free space
1436 spin_unlock_irqrestore(&priv->tx_lock, flags);
1438 } /* ftdi_write_room */
1441 static int ftdi_chars_in_buffer (struct usb_serial_port *port)
1442 { /* ftdi_chars_in_buffer */
1443 struct ftdi_private *priv = usb_get_serial_port_data(port);
1445 unsigned long flags;
1447 dbg("%s - port %d", __func__, port->number);
1449 spin_lock_irqsave(&priv->tx_lock, flags);
1450 buffered = (int)priv->tx_outstanding_bytes;
1451 spin_unlock_irqrestore(&priv->tx_lock, flags);
1453 err("%s outstanding tx bytes is negative!", __func__);
1457 } /* ftdi_chars_in_buffer */
1461 static void ftdi_read_bulk_callback (struct urb *urb)
1462 { /* ftdi_read_bulk_callback */
1463 struct usb_serial_port *port = urb->context;
1464 struct tty_struct *tty;
1465 struct ftdi_private *priv;
1466 unsigned long countread;
1467 unsigned long flags;
1468 int status = urb->status;
1470 if (urb->number_of_packets > 0) {
1471 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__func__,
1472 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets );
1473 err("%s transfer_flags %x ", __func__,urb->transfer_flags );
1476 dbg("%s - port %d", __func__, port->number);
1478 if (port->open_count <= 0)
1483 dbg("%s - bad tty pointer - exiting",__func__);
1487 priv = usb_get_serial_port_data(port);
1489 dbg("%s - bad port private data pointer - exiting", __func__);
1493 if (urb != port->read_urb) {
1494 err("%s - Not my urb!", __func__);
1498 /* This will happen at close every time so it is a dbg not an err */
1499 dbg("(this is ok on close) nonzero read bulk status received: "
1504 /* count data bytes, but not status bytes */
1505 countread = urb->actual_length;
1506 countread -= 2 * DIV_ROUND_UP(countread, PKTSZ);
1507 spin_lock_irqsave(&priv->rx_lock, flags);
1508 priv->rx_bytes += countread;
1509 spin_unlock_irqrestore(&priv->rx_lock, flags);
1511 ftdi_process_read(&priv->rx_work.work);
1513 } /* ftdi_read_bulk_callback */
1516 static void ftdi_process_read (struct work_struct *work)
1517 { /* ftdi_process_read */
1518 struct ftdi_private *priv =
1519 container_of(work, struct ftdi_private, rx_work.work);
1520 struct usb_serial_port *port = priv->port;
1522 struct tty_struct *tty;
1524 unsigned char *data;
1530 unsigned long flags;
1532 dbg("%s - port %d", __func__, port->number);
1534 if (port->open_count <= 0)
1539 dbg("%s - bad tty pointer - exiting",__func__);
1543 priv = usb_get_serial_port_data(port);
1545 dbg("%s - bad port private data pointer - exiting", __func__);
1549 urb = port->read_urb;
1551 dbg("%s - bad read_urb pointer - exiting", __func__);
1555 data = urb->transfer_buffer;
1557 if (priv->rx_processed) {
1558 dbg("%s - already processed: %d bytes, %d remain", __func__,
1560 urb->actual_length - priv->rx_processed);
1562 /* The first two bytes of every read packet are status */
1563 if (urb->actual_length > 2) {
1564 usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data);
1566 dbg("Status only: %03oo %03oo",data[0],data[1]);
1571 /* TO DO -- check for hung up line and handle appropriately: */
1573 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */
1574 /* if CD is dropped and the line is not CLOCAL then we should hangup */
1577 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) {
1580 /* Compare new line status to the old one, signal if different */
1581 /* N.B. packet may be processed more than once, but differences
1582 * are only processed once. */
1584 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK;
1585 if (new_status != priv->prev_status) {
1586 priv->diff_status |= new_status ^ priv->prev_status;
1587 wake_up_interruptible(&priv->delta_msr_wait);
1588 priv->prev_status = new_status;
1592 length = min(PKTSZ, urb->actual_length-packet_offset)-2;
1594 err("%s - bad packet length: %d", __func__, length+2);
1598 if (priv->rx_flags & THROTTLED) {
1599 dbg("%s - throttled", __func__);
1602 if (tty_buffer_request_room(tty, length) < length) {
1603 /* break out & wait for throttling/unthrottling to happen */
1604 dbg("%s - receive room low", __func__);
1608 /* Handle errors and break */
1609 error_flag = TTY_NORMAL;
1610 /* Although the device uses a bitmask and hence can have multiple */
1611 /* errors on a packet - the order here sets the priority the */
1612 /* error is returned to the tty layer */
1614 if ( data[packet_offset+1] & FTDI_RS_OE ) {
1615 error_flag = TTY_OVERRUN;
1616 dbg("OVERRRUN error");
1618 if ( data[packet_offset+1] & FTDI_RS_BI ) {
1619 error_flag = TTY_BREAK;
1620 dbg("BREAK received");
1622 if ( data[packet_offset+1] & FTDI_RS_PE ) {
1623 error_flag = TTY_PARITY;
1624 dbg("PARITY error");
1626 if ( data[packet_offset+1] & FTDI_RS_FE ) {
1627 error_flag = TTY_FRAME;
1628 dbg("FRAMING error");
1631 for (i = 2; i < length+2; i++) {
1632 /* Note that the error flag is duplicated for
1633 every character received since we don't know
1634 which character it applied to */
1635 tty_insert_flip_char(tty, data[packet_offset+i], error_flag);
1640 #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW
1641 /* if a parity error is detected you get status packets forever
1642 until a character is sent without a parity error.
1643 This doesn't work well since the application receives a never
1644 ending stream of bad data - even though new data hasn't been sent.
1645 Therefore I (bill) have taken this out.
1646 However - this might make sense for framing errors and so on
1647 so I am leaving the code in for now.
1650 if (error_flag != TTY_NORMAL){
1651 dbg("error_flag is not normal");
1652 /* In this case it is just status - if that is an error send a bad character */
1653 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
1654 tty_flip_buffer_push(tty);
1656 tty_insert_flip_char(tty, 0xff, error_flag);
1661 } /* "for(packet_offset=0..." */
1665 tty_flip_buffer_push(tty);
1668 if (packet_offset < urb->actual_length) {
1669 /* not completely processed - record progress */
1670 priv->rx_processed = packet_offset;
1671 dbg("%s - incomplete, %d bytes processed, %d remain",
1672 __func__, packet_offset,
1673 urb->actual_length - packet_offset);
1674 /* check if we were throttled while processing */
1675 spin_lock_irqsave(&priv->rx_lock, flags);
1676 if (priv->rx_flags & THROTTLED) {
1677 priv->rx_flags |= ACTUALLY_THROTTLED;
1678 spin_unlock_irqrestore(&priv->rx_lock, flags);
1679 dbg("%s - deferring remainder until unthrottled",
1683 spin_unlock_irqrestore(&priv->rx_lock, flags);
1684 /* if the port is closed stop trying to read */
1685 if (port->open_count > 0){
1686 /* delay processing of remainder */
1687 schedule_delayed_work(&priv->rx_work, 1);
1689 dbg("%s - port is closed", __func__);
1694 /* urb is completely processed */
1695 priv->rx_processed = 0;
1697 /* if the port is closed stop trying to read */
1698 if (port->open_count > 0){
1699 /* Continue trying to always read */
1700 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1701 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
1702 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1703 ftdi_read_bulk_callback, port);
1705 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1707 err("%s - failed resubmitting read urb, error %d", __func__, result);
1711 } /* ftdi_process_read */
1714 static void ftdi_break_ctl( struct usb_serial_port *port, int break_state )
1716 struct ftdi_private *priv = usb_get_serial_port_data(port);
1717 __u16 urb_value = 0;
1720 /* break_state = -1 to turn on break, and 0 to turn off break */
1721 /* see drivers/char/tty_io.c to see it used */
1722 /* last_set_data_urb_value NEVER has the break bit set in it */
1725 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
1727 urb_value = priv->last_set_data_urb_value;
1731 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
1732 FTDI_SIO_SET_DATA_REQUEST,
1733 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1734 urb_value , priv->interface,
1735 buf, 0, WDR_TIMEOUT) < 0) {
1736 err("%s FAILED to enable/disable break state (state was %d)", __func__,break_state);
1739 dbg("%s break state is %d - urb is %d", __func__,break_state, urb_value);
1744 /* old_termios contains the original termios settings and tty->termios contains
1745 * the new setting to be used
1746 * WARNING: set_termios calls this with old_termios in kernel space
1749 static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
1750 { /* ftdi_termios */
1751 struct usb_device *dev = port->serial->dev;
1752 struct ftdi_private *priv = usb_get_serial_port_data(port);
1753 struct ktermios *termios = port->tty->termios;
1754 unsigned int cflag = termios->c_cflag;
1755 __u16 urb_value; /* will hold the new flags */
1756 char buf[1]; /* Perhaps I should dynamically alloc this? */
1758 // Added for xon/xoff support
1759 unsigned int iflag = termios->c_iflag;
1760 unsigned char vstop;
1761 unsigned char vstart;
1763 dbg("%s", __func__);
1765 /* Force baud rate if this device requires it, unless it is set to B0. */
1766 if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) {
1767 dbg("%s: forcing baud rate for this device", __func__);
1768 tty_encode_baud_rate(port->tty, priv->force_baud,
1772 /* Force RTS-CTS if this device requires it. */
1773 if (priv->force_rtscts) {
1774 dbg("%s: forcing rtscts for this device", __func__);
1775 termios->c_cflag |= CRTSCTS;
1778 cflag = termios->c_cflag;
1780 /* FIXME -For this cut I don't care if the line is really changing or
1781 not - so just do the change regardless - should be able to
1782 compare old_termios and tty->termios */
1783 /* NOTE These routines can get interrupted by
1784 ftdi_sio_read_bulk_callback - need to examine what this
1785 means - don't see any problems yet */
1787 /* Set number of data bits, parity, stop bits */
1789 termios->c_cflag &= ~CMSPAR;
1792 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
1793 FTDI_SIO_SET_DATA_STOP_BITS_1);
1794 urb_value |= (cflag & PARENB ?
1795 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
1796 FTDI_SIO_SET_DATA_PARITY_EVEN) :
1797 FTDI_SIO_SET_DATA_PARITY_NONE);
1798 if (cflag & CSIZE) {
1799 switch (cflag & CSIZE) {
1800 case CS5: urb_value |= 5; dbg("Setting CS5"); break;
1801 case CS6: urb_value |= 6; dbg("Setting CS6"); break;
1802 case CS7: urb_value |= 7; dbg("Setting CS7"); break;
1803 case CS8: urb_value |= 8; dbg("Setting CS8"); break;
1805 err("CSIZE was set but not CS5-CS8");
1809 /* This is needed by the break command since it uses the same command - but is
1810 * or'ed with this value */
1811 priv->last_set_data_urb_value = urb_value;
1813 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1814 FTDI_SIO_SET_DATA_REQUEST,
1815 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1816 urb_value , priv->interface,
1817 buf, 0, WDR_SHORT_TIMEOUT) < 0) {
1818 err("%s FAILED to set databits/stopbits/parity", __func__);
1821 /* Now do the baudrate */
1822 if ((cflag & CBAUD) == B0 ) {
1823 /* Disable flow control */
1824 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1825 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1826 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1828 buf, 0, WDR_TIMEOUT) < 0) {
1829 err("%s error from disable flowcontrol urb", __func__);
1831 /* Drop RTS and DTR */
1832 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1834 /* set the baudrate determined before */
1835 if (change_speed(port)) {
1836 err("%s urb failed to set baudrate", __func__);
1838 /* Ensure RTS and DTR are raised when baudrate changed from 0 */
1839 if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) {
1840 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1844 /* Set flow control */
1845 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
1846 if (cflag & CRTSCTS) {
1847 dbg("%s Setting to CRTSCTS flow control", __func__);
1848 if (usb_control_msg(dev,
1849 usb_sndctrlpipe(dev, 0),
1850 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1851 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1852 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
1853 buf, 0, WDR_TIMEOUT) < 0) {
1854 err("urb failed to set to rts/cts flow control");
1861 * Check the IXOFF status in the iflag component of the termios structure
1862 * if IXOFF is not set, the pre-xon/xoff code is executed.
1864 if (iflag & IXOFF) {
1865 dbg("%s request to enable xonxoff iflag=%04x",__func__,iflag);
1866 // Try to enable the XON/XOFF on the ftdi_sio
1867 // Set the vstart and vstop -- could have been done up above where
1868 // a lot of other dereferencing is done but that would be very
1869 // inefficient as vstart and vstop are not always needed
1870 vstart = termios->c_cc[VSTART];
1871 vstop = termios->c_cc[VSTOP];
1872 urb_value=(vstop << 8) | (vstart);
1874 if (usb_control_msg(dev,
1875 usb_sndctrlpipe(dev, 0),
1876 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1877 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1878 urb_value , (FTDI_SIO_XON_XOFF_HS
1880 buf, 0, WDR_TIMEOUT) < 0) {
1881 err("urb failed to set to xon/xoff flow control");
1884 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */
1885 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */
1886 dbg("%s Turning off hardware flow control", __func__);
1887 if (usb_control_msg(dev,
1888 usb_sndctrlpipe(dev, 0),
1889 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1890 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1892 buf, 0, WDR_TIMEOUT) < 0) {
1893 err("urb failed to clear flow control");
1899 } /* ftdi_termios */
1902 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file)
1904 struct ftdi_private *priv = usb_get_serial_port_data(port);
1905 unsigned char buf[2];
1908 dbg("%s TIOCMGET", __func__);
1909 switch (priv->chip_type) {
1911 /* Request the status from the device */
1912 if ((ret = usb_control_msg(port->serial->dev,
1913 usb_rcvctrlpipe(port->serial->dev, 0),
1914 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1915 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
1917 buf, 1, WDR_TIMEOUT)) < 0 ) {
1918 err("%s Could not get modem status of device - err: %d", __func__,
1927 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same
1928 format as the data returned from the in point */
1929 if ((ret = usb_control_msg(port->serial->dev,
1930 usb_rcvctrlpipe(port->serial->dev, 0),
1931 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1932 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
1934 buf, 2, WDR_TIMEOUT)) < 0 ) {
1935 err("%s Could not get modem status of device - err: %d", __func__,
1945 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
1946 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
1947 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) |
1948 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) |
1952 static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear)
1954 dbg("%s TIOCMSET", __func__);
1955 return update_mctrl(port, set, clear);
1959 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
1961 struct ftdi_private *priv = usb_get_serial_port_data(port);
1963 dbg("%s cmd 0x%04x", __func__, cmd);
1965 /* Based on code from acm.c and others */
1968 case TIOCGSERIAL: /* gets serial port data */
1969 return get_serial_info(port, (struct serial_struct __user *) arg);
1971 case TIOCSSERIAL: /* sets serial port data */
1972 return set_serial_info(port, (struct serial_struct __user *) arg);
1975 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1976 * - mask passed in arg for lines of interest
1977 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1978 * Caller should use TIOCGICOUNT to see which one it was.
1980 * This code is borrowed from linux/drivers/char/serial.c
1983 while (priv != NULL) {
1984 interruptible_sleep_on(&priv->delta_msr_wait);
1985 /* see if a signal did it */
1986 if (signal_pending(current))
1987 return -ERESTARTSYS;
1989 char diff = priv->diff_status;
1992 return -EIO; /* no change => error */
1995 /* Consume all events */
1996 priv->diff_status = 0;
1998 /* Return 0 if caller wanted to know about these bits */
1999 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
2000 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
2001 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) ||
2002 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) {
2006 * Otherwise caller can't care less about what happened,
2007 * and so we continue to wait for more events.
2019 /* This is not necessarily an error - turns out the higher layers will do
2020 * some ioctls itself (see comment above)
2022 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __func__, cmd);
2024 return(-ENOIOCTLCMD);
2028 static void ftdi_throttle (struct usb_serial_port *port)
2030 struct ftdi_private *priv = usb_get_serial_port_data(port);
2031 unsigned long flags;
2033 dbg("%s - port %d", __func__, port->number);
2035 spin_lock_irqsave(&priv->rx_lock, flags);
2036 priv->rx_flags |= THROTTLED;
2037 spin_unlock_irqrestore(&priv->rx_lock, flags);
2041 static void ftdi_unthrottle (struct usb_serial_port *port)
2043 struct ftdi_private *priv = usb_get_serial_port_data(port);
2044 int actually_throttled;
2045 unsigned long flags;
2047 dbg("%s - port %d", __func__, port->number);
2049 spin_lock_irqsave(&priv->rx_lock, flags);
2050 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
2051 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
2052 spin_unlock_irqrestore(&priv->rx_lock, flags);
2054 if (actually_throttled)
2055 schedule_delayed_work(&priv->rx_work, 0);
2058 static int __init ftdi_init (void)
2062 dbg("%s", __func__);
2063 if (vendor > 0 && product > 0) {
2064 /* Add user specified VID/PID to reserved element of table. */
2066 for (i = 0; id_table_combined[i].idVendor; i++)
2068 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
2069 id_table_combined[i].idVendor = vendor;
2070 id_table_combined[i].idProduct = product;
2072 retval = usb_serial_register(&ftdi_sio_device);
2074 goto failed_sio_register;
2075 retval = usb_register(&ftdi_driver);
2077 goto failed_usb_register;
2079 info(DRIVER_VERSION ":" DRIVER_DESC);
2081 failed_usb_register:
2082 usb_serial_deregister(&ftdi_sio_device);
2083 failed_sio_register:
2088 static void __exit ftdi_exit (void)
2091 dbg("%s", __func__);
2093 usb_deregister (&ftdi_driver);
2094 usb_serial_deregister (&ftdi_sio_device);
2099 module_init(ftdi_init);
2100 module_exit(ftdi_exit);
2102 MODULE_AUTHOR( DRIVER_AUTHOR );
2103 MODULE_DESCRIPTION( DRIVER_DESC );
2104 MODULE_LICENSE("GPL");
2106 module_param(debug, bool, S_IRUGO | S_IWUSR);
2107 MODULE_PARM_DESC(debug, "Debug enabled or not");
2108 module_param(vendor, ushort, 0);
2109 MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
2110 __MODULE_STRING(FTDI_VID)")");
2111 module_param(product, ushort, 0);
2112 MODULE_PARM_DESC(vendor, "User specified product ID");