1 /* 2 * USB FTDI SIO driver 3 * 4 * Copyright (C) 1999 - 2001 5 * Greg Kroah-Hartman (greg@kroah.com) 6 * Bill Ryder (bryder@sgi.com) 7 * Copyright (C) 2002 8 * Kuba Ober (kuba@mareimbrium.org) 9 * 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. 14 * 15 * See Documentation/usb/usb-serial.txt for more information on using this driver 16 * 17 * See http://ftdi-usb-sio.sourceforge.net for upto date testing info 18 * and extra documentation 19 * 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. 22 * 23 */ 24 25 /* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */ 26 /* Thanx to FTDI for so kindly providing details of the protocol required */ 27 /* to talk to the device */ 28 /* Thanx to gkh and the rest of the usb dev group for all code I have assimilated :-) */ 29 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> 43 #include "ftdi_sio.h" 44 45 /* 46 * Version Information 47 */ 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" 51 52 static int debug; 53 static __u16 vendor = FTDI_VID; 54 static __u16 product; 55 56 struct ftdi_private { 57 ftdi_chip_type_t chip_type; 58 /* type of the device, either SIO or FT8U232AM */ 59 int baud_base; /* baud base clock for divisor setting */ 60 int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */ 61 __u16 last_set_data_urb_value ; 62 /* the last data state set - needed for doing a break */ 63 int write_offset; /* This is the offset in the usb data block to write the serial data - 64 * it is different between devices 65 */ 66 int flags; /* some ASYNC_xxxx flags are supported */ 67 unsigned long last_dtr_rts; /* saved modem control outputs */ 68 wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ 69 char prev_status, diff_status; /* Used for TIOCMIWAIT */ 70 __u8 rx_flags; /* receive state flags (throttling) */ 71 spinlock_t rx_lock; /* spinlock for receive state */ 72 struct delayed_work rx_work; 73 struct usb_serial_port *port; 74 int rx_processed; 75 unsigned long rx_bytes; 76 77 __u16 interface; /* FT2232C port interface (0 for FT232/245) */ 78 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 */ 81 82 spinlock_t tx_lock; /* spinlock for transmit state */ 83 unsigned long tx_bytes; 84 unsigned long tx_outstanding_bytes; 85 unsigned long tx_outstanding_urbs; 86 }; 87 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. */ 92 }; 93 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); 98 99 static struct ftdi_sio_quirk ftdi_jtag_quirk = { 100 .probe = ftdi_jtag_probe, 101 }; 102 103 static struct ftdi_sio_quirk ftdi_mtxorb_hack_quirk = { 104 .probe = ftdi_mtxorb_hack_setup, 105 }; 106 107 static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = { 108 .port_probe = ftdi_USB_UIRT_setup, 109 }; 110 111 static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = { 112 .port_probe = ftdi_HE_TIRA1_setup, 113 }; 114 115 /* 116 * The 8U232AM has the same API as the sio except for: 117 * - it can support MUCH higher baudrates; up to: 118 * o 921600 for RS232 and 2000000 for RS422/485 at 48MHz 119 * o 230400 at 12MHz 120 * so .. 8U232AM's baudrate setting codes are different 121 * - it has a two byte status code. 122 * - it returns characters every 16ms (the FTDI does it every 40ms) 123 * 124 * the bcdDevice value is used to differentiate FT232BM and FT245BM from 125 * the earlier FT8U232AM and FT8U232BM. For now, include all known VID/PID 126 * combinations in both tables. 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] 129 */ 130 131 132 133 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) }, 262 /* 263 * Due to many user requests for multiple ELV devices we enable 264 * them by default. 265 */ 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 */ 371 }; 372 373 MODULE_DEVICE_TABLE (usb, id_table_combined); 374 375 static struct usb_driver ftdi_driver = { 376 .name = "ftdi_sio", 377 .probe = usb_serial_probe, 378 .disconnect = usb_serial_disconnect, 379 .id_table = id_table_combined, 380 .no_dynamic_id = 1, 381 }; 382 383 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", 389 }; 390 391 392 /* Constants for read urb and write urb */ 393 #define BUFSZ 512 394 #define PKTSZ 64 395 396 /* rx_flags */ 397 #define THROTTLED 0x01 398 #define ACTUALLY_THROTTLED 0x02 399 400 /* 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) 403 /* End TIOCMIWAIT */ 404 405 #define FTDI_IMPL_ASYNC_FLAGS = (ASYNC_SPD_HI | ASYNC_SPD_VHI \ 406 | ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP) 407 408 /* 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); 428 429 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); 433 434 static struct usb_serial_driver ftdi_sio_device = { 435 .driver = { 436 .owner = THIS_MODULE, 437 .name = "ftdi_sio", 438 }, 439 .description = "FTDI USB Serial Device", 440 .usb_driver = &ftdi_driver , 441 .id_table = id_table_combined, 442 .num_interrupt_in = 0, 443 .num_bulk_in = 1, 444 .num_bulk_out = 1, 445 .num_ports = 1, 446 .probe = ftdi_sio_probe, 447 .port_probe = ftdi_sio_port_probe, 448 .port_remove = ftdi_sio_port_remove, 449 .open = ftdi_open, 450 .close = ftdi_close, 451 .throttle = ftdi_throttle, 452 .unthrottle = ftdi_unthrottle, 453 .write = ftdi_write, 454 .write_room = ftdi_write_room, 455 .chars_in_buffer = ftdi_chars_in_buffer, 456 .read_bulk_callback = ftdi_read_bulk_callback, 457 .write_bulk_callback = ftdi_write_bulk_callback, 458 .tiocmget = ftdi_tiocmget, 459 .tiocmset = ftdi_tiocmset, 460 .ioctl = ftdi_ioctl, 461 .set_termios = ftdi_set_termios, 462 .break_ctl = ftdi_break_ctl, 463 .shutdown = ftdi_shutdown, 464 }; 465 466 467 #define WDR_TIMEOUT 5000 /* default urb timeout */ 468 #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */ 469 470 /* High and low are for DTR, RTS etc etc */ 471 #define HIGH 1 472 #define LOW 0 473 474 /* number of outstanding urbs to prevent userspace DoS from happening */ 475 #define URB_UPPER_LIMIT 42 476 477 /* 478 * *************************************************************************** 479 * Utility functions 480 * *************************************************************************** 481 */ 482 483 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base) 484 { 485 unsigned short int divisor; 486 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left 487 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1 488 divisor = divisor3 >> 3; 489 divisor3 &= 0x7; 490 if (divisor3 == 1) divisor |= 0xc000; else // 0.125 491 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5 492 if (divisor3 != 0) divisor |= 0x8000; // 0.25 493 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */ 494 return divisor; 495 } 496 497 static unsigned short int ftdi_232am_baud_to_divisor(int baud) 498 { 499 return(ftdi_232am_baud_base_to_divisor(baud, 48000000)); 500 } 501 502 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base) 503 { 504 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 }; 505 __u32 divisor; 506 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left 507 divisor = divisor3 >> 3; 508 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; 509 /* Deal with special cases for highest baud rates. */ 510 if (divisor == 1) divisor = 0; else // 1.0 511 if (divisor == 0x4001) divisor = 1; // 1.5 512 return divisor; 513 } 514 515 static __u32 ftdi_232bm_baud_to_divisor(int baud) 516 { 517 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000)); 518 } 519 520 #define set_mctrl(port, set) update_mctrl((port), (set), 0) 521 #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear)) 522 523 static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear) 524 { 525 struct ftdi_private *priv = usb_get_serial_port_data(port); 526 char *buf; 527 unsigned urb_value; 528 int rv; 529 530 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { 531 dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__); 532 return 0; /* no change */ 533 } 534 535 buf = kmalloc(1, GFP_NOIO); 536 if (!buf) { 537 return -ENOMEM; 538 } 539 540 clear &= ~set; /* 'set' takes precedence over 'clear' */ 541 urb_value = 0; 542 if (clear & TIOCM_DTR) 543 urb_value |= FTDI_SIO_SET_DTR_LOW; 544 if (clear & TIOCM_RTS) 545 urb_value |= FTDI_SIO_SET_RTS_LOW; 546 if (set & TIOCM_DTR) 547 urb_value |= FTDI_SIO_SET_DTR_HIGH; 548 if (set & TIOCM_RTS) 549 urb_value |= FTDI_SIO_SET_RTS_HIGH; 550 rv = usb_control_msg(port->serial->dev, 551 usb_sndctrlpipe(port->serial->dev, 0), 552 FTDI_SIO_SET_MODEM_CTRL_REQUEST, 553 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, 554 urb_value, priv->interface, 555 buf, 0, WDR_TIMEOUT); 556 557 kfree(buf); 558 if (rv < 0) { 559 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s", 560 __FUNCTION__, 561 (set & TIOCM_DTR) ? "HIGH" : 562 (clear & TIOCM_DTR) ? "LOW" : "unchanged", 563 (set & TIOCM_RTS) ? "HIGH" : 564 (clear & TIOCM_RTS) ? "LOW" : "unchanged"); 565 } else { 566 dbg("%s - DTR %s, RTS %s", __FUNCTION__, 567 (set & TIOCM_DTR) ? "HIGH" : 568 (clear & TIOCM_DTR) ? "LOW" : "unchanged", 569 (set & TIOCM_RTS) ? "HIGH" : 570 (clear & TIOCM_RTS) ? "LOW" : "unchanged"); 571 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set; 572 } 573 return rv; 574 } 575 576 577 static __u32 get_ftdi_divisor(struct usb_serial_port * port); 578 579 580 static int change_speed(struct usb_serial_port *port) 581 { 582 struct ftdi_private *priv = usb_get_serial_port_data(port); 583 char *buf; 584 __u16 urb_value; 585 __u16 urb_index; 586 __u32 urb_index_value; 587 int rv; 588 589 buf = kmalloc(1, GFP_NOIO); 590 if (!buf) 591 return -ENOMEM; 592 593 urb_index_value = get_ftdi_divisor(port); 594 urb_value = (__u16)urb_index_value; 595 urb_index = (__u16)(urb_index_value >> 16); 596 if (priv->interface) { /* FT2232C */ 597 urb_index = (__u16)((urb_index << 8) | priv->interface); 598 } 599 600 rv = usb_control_msg(port->serial->dev, 601 usb_sndctrlpipe(port->serial->dev, 0), 602 FTDI_SIO_SET_BAUDRATE_REQUEST, 603 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE, 604 urb_value, urb_index, 605 buf, 0, WDR_SHORT_TIMEOUT); 606 607 kfree(buf); 608 return rv; 609 } 610 611 612 static __u32 get_ftdi_divisor(struct usb_serial_port * port) 613 { /* get_ftdi_divisor */ 614 struct ftdi_private *priv = usb_get_serial_port_data(port); 615 __u32 div_value = 0; 616 int div_okay = 1; 617 int baud; 618 619 /* 620 * The logic involved in setting the baudrate can be cleanly split in 3 steps. 621 * Obtaining the actual baud rate is a little tricky since unix traditionally 622 * somehow ignored the possibility to set non-standard baud rates. 623 * 1. Standard baud rates are set in tty->termios->c_cflag 624 * 2. If these are not enough, you can set any speed using alt_speed as follows: 625 * - set tty->termios->c_cflag speed to B38400 626 * - set your real speed in tty->alt_speed; it gets ignored when 627 * alt_speed==0, (or) 628 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: 629 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just 630 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800) 631 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate 632 * 3. You can also set baud rate by setting custom divisor as follows 633 * - set tty->termios->c_cflag speed to B38400 634 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: 635 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST 636 * o custom_divisor set to baud_base / your_new_baudrate 637 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really 638 * spend some time and separate+move this common code to serial.c, it is 639 * replicated in nearly every serial driver you see. 640 */ 641 642 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */ 643 644 baud = tty_get_baud_rate(port->tty); 645 dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud); 646 647 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */ 648 649 if (baud == 38400 && 650 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && 651 (priv->custom_divisor)) { 652 baud = priv->baud_base / priv->custom_divisor; 653 dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud); 654 } 655 656 /* 3. Convert baudrate to device-specific divisor */ 657 658 if (!baud) baud = 9600; 659 switch(priv->chip_type) { 660 case SIO: /* SIO chip */ 661 switch(baud) { 662 case 300: div_value = ftdi_sio_b300; break; 663 case 600: div_value = ftdi_sio_b600; break; 664 case 1200: div_value = ftdi_sio_b1200; break; 665 case 2400: div_value = ftdi_sio_b2400; break; 666 case 4800: div_value = ftdi_sio_b4800; break; 667 case 9600: div_value = ftdi_sio_b9600; break; 668 case 19200: div_value = ftdi_sio_b19200; break; 669 case 38400: div_value = ftdi_sio_b38400; break; 670 case 57600: div_value = ftdi_sio_b57600; break; 671 case 115200: div_value = ftdi_sio_b115200; break; 672 } /* baud */ 673 if (div_value == 0) { 674 dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud); 675 div_value = ftdi_sio_b9600; 676 baud = 9600; 677 div_okay = 0; 678 } 679 break; 680 case FT8U232AM: /* 8U232AM chip */ 681 if (baud <= 3000000) { 682 div_value = ftdi_232am_baud_to_divisor(baud); 683 } else { 684 dbg("%s - Baud rate too high!", __FUNCTION__); 685 baud = 9600; 686 div_value = ftdi_232am_baud_to_divisor(9600); 687 div_okay = 0; 688 } 689 break; 690 case FT232BM: /* FT232BM chip */ 691 case FT2232C: /* FT2232C chip */ 692 case FT232RL: 693 if (baud <= 3000000) { 694 div_value = ftdi_232bm_baud_to_divisor(baud); 695 } else { 696 dbg("%s - Baud rate too high!", __FUNCTION__); 697 div_value = ftdi_232bm_baud_to_divisor(9600); 698 div_okay = 0; 699 baud = 9600; 700 } 701 break; 702 } /* priv->chip_type */ 703 704 if (div_okay) { 705 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s", 706 __FUNCTION__, baud, (unsigned long)div_value, 707 ftdi_chip_name[priv->chip_type]); 708 } 709 710 tty_encode_baud_rate(port->tty, baud, baud); 711 return(div_value); 712 } 713 714 715 static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo) 716 { 717 struct ftdi_private *priv = usb_get_serial_port_data(port); 718 struct serial_struct tmp; 719 720 if (!retinfo) 721 return -EFAULT; 722 memset(&tmp, 0, sizeof(tmp)); 723 tmp.flags = priv->flags; 724 tmp.baud_base = priv->baud_base; 725 tmp.custom_divisor = priv->custom_divisor; 726 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 727 return -EFAULT; 728 return 0; 729 } /* get_serial_info */ 730 731 732 static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo) 733 { /* set_serial_info */ 734 struct ftdi_private *priv = usb_get_serial_port_data(port); 735 struct serial_struct new_serial; 736 struct ftdi_private old_priv; 737 738 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 739 return -EFAULT; 740 old_priv = * priv; 741 742 /* Do error checking and permission checking */ 743 744 if (!capable(CAP_SYS_ADMIN)) { 745 if (((new_serial.flags & ~ASYNC_USR_MASK) != 746 (priv->flags & ~ASYNC_USR_MASK))) 747 return -EPERM; 748 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) | 749 (new_serial.flags & ASYNC_USR_MASK)); 750 priv->custom_divisor = new_serial.custom_divisor; 751 goto check_and_exit; 752 } 753 754 if ((new_serial.baud_base != priv->baud_base) && 755 (new_serial.baud_base < 9600)) 756 return -EINVAL; 757 758 /* Make the changes - these are privileged changes! */ 759 760 priv->flags = ((priv->flags & ~ASYNC_FLAGS) | 761 (new_serial.flags & ASYNC_FLAGS)); 762 priv->custom_divisor = new_serial.custom_divisor; 763 764 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 765 766 check_and_exit: 767 if ((old_priv.flags & ASYNC_SPD_MASK) != 768 (priv->flags & ASYNC_SPD_MASK)) { 769 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) 770 port->tty->alt_speed = 57600; 771 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) 772 port->tty->alt_speed = 115200; 773 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) 774 port->tty->alt_speed = 230400; 775 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) 776 port->tty->alt_speed = 460800; 777 else 778 port->tty->alt_speed = 0; 779 } 780 if (((old_priv.flags & ASYNC_SPD_MASK) != 781 (priv->flags & ASYNC_SPD_MASK)) || 782 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && 783 (old_priv.custom_divisor != priv->custom_divisor))) { 784 change_speed(port); 785 } 786 787 return (0); 788 789 } /* set_serial_info */ 790 791 792 /* Determine type of FTDI chip based on USB config and descriptor. */ 793 static void ftdi_determine_type(struct usb_serial_port *port) 794 { 795 struct ftdi_private *priv = usb_get_serial_port_data(port); 796 struct usb_serial *serial = port->serial; 797 struct usb_device *udev = serial->dev; 798 unsigned version; 799 unsigned interfaces; 800 801 /* Assume it is not the original SIO device for now. */ 802 priv->baud_base = 48000000 / 2; 803 priv->write_offset = 0; 804 805 version = le16_to_cpu(udev->descriptor.bcdDevice); 806 interfaces = udev->actconfig->desc.bNumInterfaces; 807 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__, 808 version, interfaces); 809 if (interfaces > 1) { 810 int inter; 811 812 /* Multiple interfaces. Assume FT2232C. */ 813 priv->chip_type = FT2232C; 814 /* Determine interface code. */ 815 inter = serial->interface->altsetting->desc.bInterfaceNumber; 816 if (inter == 0) { 817 priv->interface = PIT_SIOA; 818 } else { 819 priv->interface = PIT_SIOB; 820 } 821 /* BM-type devices have a bug where bcdDevice gets set 822 * to 0x200 when iSerialNumber is 0. */ 823 if (version < 0x500) { 824 dbg("%s: something fishy - bcdDevice too low for multi-interface device", 825 __FUNCTION__); 826 } 827 } else if (version < 0x200) { 828 /* Old device. Assume its the original SIO. */ 829 priv->chip_type = SIO; 830 priv->baud_base = 12000000 / 16; 831 priv->write_offset = 1; 832 } else if (version < 0x400) { 833 /* Assume its an FT8U232AM (or FT8U245AM) */ 834 /* (It might be a BM because of the iSerialNumber bug, 835 * but it will still work as an AM device.) */ 836 priv->chip_type = FT8U232AM; 837 } else if (version < 0x600) { 838 /* Assume its an FT232BM (or FT245BM) */ 839 priv->chip_type = FT232BM; 840 } else { 841 /* Assume its an FT232R */ 842 priv->chip_type = FT232RL; 843 } 844 info("Detected %s", ftdi_chip_name[priv->chip_type]); 845 } 846 847 848 /* 849 * *************************************************************************** 850 * Sysfs Attribute 851 * *************************************************************************** 852 */ 853 854 static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf) 855 { 856 struct usb_serial_port *port = to_usb_serial_port(dev); 857 struct ftdi_private *priv = usb_get_serial_port_data(port); 858 struct usb_device *udev = port->serial->dev; 859 unsigned short latency = 0; 860 int rv = 0; 861 862 863 dbg("%s",__FUNCTION__); 864 865 rv = usb_control_msg(udev, 866 usb_rcvctrlpipe(udev, 0), 867 FTDI_SIO_GET_LATENCY_TIMER_REQUEST, 868 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE, 869 0, priv->interface, 870 (char*) &latency, 1, WDR_TIMEOUT); 871 872 if (rv < 0) { 873 dev_err(dev, "Unable to read latency timer: %i\n", rv); 874 return -EIO; 875 } 876 return sprintf(buf, "%i\n", latency); 877 } 878 879 /* Write a new value of the latency timer, in units of milliseconds. */ 880 static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf, 881 size_t count) 882 { 883 struct usb_serial_port *port = to_usb_serial_port(dev); 884 struct ftdi_private *priv = usb_get_serial_port_data(port); 885 struct usb_device *udev = port->serial->dev; 886 char buf[1]; 887 int v = simple_strtoul(valbuf, NULL, 10); 888 int rv = 0; 889 890 dbg("%s: setting latency timer = %i", __FUNCTION__, v); 891 892 rv = usb_control_msg(udev, 893 usb_sndctrlpipe(udev, 0), 894 FTDI_SIO_SET_LATENCY_TIMER_REQUEST, 895 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE, 896 v, priv->interface, 897 buf, 0, WDR_TIMEOUT); 898 899 if (rv < 0) { 900 dev_err(dev, "Unable to write latency timer: %i\n", rv); 901 return -EIO; 902 } 903 904 return count; 905 } 906 907 /* Write an event character directly to the FTDI register. The ASCII 908 value is in the low 8 bits, with the enable bit in the 9th bit. */ 909 static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf, 910 size_t count) 911 { 912 struct usb_serial_port *port = to_usb_serial_port(dev); 913 struct ftdi_private *priv = usb_get_serial_port_data(port); 914 struct usb_device *udev = port->serial->dev; 915 char buf[1]; 916 int v = simple_strtoul(valbuf, NULL, 10); 917 int rv = 0; 918 919 dbg("%s: setting event char = %i", __FUNCTION__, v); 920 921 rv = usb_control_msg(udev, 922 usb_sndctrlpipe(udev, 0), 923 FTDI_SIO_SET_EVENT_CHAR_REQUEST, 924 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE, 925 v, priv->interface, 926 buf, 0, WDR_TIMEOUT); 927 928 if (rv < 0) { 929 dbg("Unable to write event character: %i", rv); 930 return -EIO; 931 } 932 933 return count; 934 } 935 936 static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer); 937 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char); 938 939 static int create_sysfs_attrs(struct usb_serial_port *port) 940 { 941 struct ftdi_private *priv = usb_get_serial_port_data(port); 942 int retval = 0; 943 944 dbg("%s",__FUNCTION__); 945 946 /* XXX I've no idea if the original SIO supports the event_char 947 * sysfs parameter, so I'm playing it safe. */ 948 if (priv->chip_type != SIO) { 949 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]); 950 retval = device_create_file(&port->dev, &dev_attr_event_char); 951 if ((!retval) && 952 (priv->chip_type == FT232BM || 953 priv->chip_type == FT2232C || 954 priv->chip_type == FT232RL)) { 955 retval = device_create_file(&port->dev, 956 &dev_attr_latency_timer); 957 } 958 } 959 return retval; 960 } 961 962 static void remove_sysfs_attrs(struct usb_serial_port *port) 963 { 964 struct ftdi_private *priv = usb_get_serial_port_data(port); 965 966 dbg("%s",__FUNCTION__); 967 968 /* XXX see create_sysfs_attrs */ 969 if (priv->chip_type != SIO) { 970 device_remove_file(&port->dev, &dev_attr_event_char); 971 if (priv->chip_type == FT232BM || 972 priv->chip_type == FT2232C || 973 priv->chip_type == FT232RL) { 974 device_remove_file(&port->dev, &dev_attr_latency_timer); 975 } 976 } 977 978 } 979 980 /* 981 * *************************************************************************** 982 * FTDI driver specific functions 983 * *************************************************************************** 984 */ 985 986 /* Probe function to check for special devices */ 987 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id) 988 { 989 struct ftdi_sio_quirk *quirk = (struct ftdi_sio_quirk *)id->driver_info; 990 991 if (quirk && quirk->probe) { 992 int ret = quirk->probe(serial); 993 if (ret != 0) 994 return ret; 995 } 996 997 usb_set_serial_data(serial, (void *)id->driver_info); 998 999 return 0; 1000 } 1001 1002 static int ftdi_sio_port_probe(struct usb_serial_port *port) 1003 { 1004 struct ftdi_private *priv; 1005 struct ftdi_sio_quirk *quirk = usb_get_serial_data(port->serial); 1006 1007 1008 dbg("%s",__FUNCTION__); 1009 1010 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL); 1011 if (!priv){ 1012 err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private)); 1013 return -ENOMEM; 1014 } 1015 1016 spin_lock_init(&priv->rx_lock); 1017 spin_lock_init(&priv->tx_lock); 1018 init_waitqueue_head(&priv->delta_msr_wait); 1019 /* This will push the characters through immediately rather 1020 than queue a task to deliver them */ 1021 priv->flags = ASYNC_LOW_LATENCY; 1022 1023 if (quirk && quirk->port_probe) 1024 quirk->port_probe(priv); 1025 1026 /* Increase the size of read buffers */ 1027 kfree(port->bulk_in_buffer); 1028 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL); 1029 if (!port->bulk_in_buffer) { 1030 kfree (priv); 1031 return -ENOMEM; 1032 } 1033 if (port->read_urb) { 1034 port->read_urb->transfer_buffer = port->bulk_in_buffer; 1035 port->read_urb->transfer_buffer_length = BUFSZ; 1036 } 1037 1038 INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read); 1039 priv->port = port; 1040 1041 /* Free port's existing write urb and transfer buffer. */ 1042 if (port->write_urb) { 1043 usb_free_urb (port->write_urb); 1044 port->write_urb = NULL; 1045 } 1046 kfree(port->bulk_out_buffer); 1047 port->bulk_out_buffer = NULL; 1048 1049 usb_set_serial_port_data(port, priv); 1050 1051 ftdi_determine_type (port); 1052 create_sysfs_attrs(port); 1053 return 0; 1054 } 1055 1056 /* Setup for the USB-UIRT device, which requires hardwired 1057 * baudrate (38400 gets mapped to 312500) */ 1058 /* Called from usbserial:serial_probe */ 1059 static void ftdi_USB_UIRT_setup (struct ftdi_private *priv) 1060 { 1061 dbg("%s",__FUNCTION__); 1062 1063 priv->flags |= ASYNC_SPD_CUST; 1064 priv->custom_divisor = 77; 1065 priv->force_baud = 38400; 1066 } /* ftdi_USB_UIRT_setup */ 1067 1068 /* Setup for the HE-TIRA1 device, which requires hardwired 1069 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */ 1070 static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv) 1071 { 1072 dbg("%s",__FUNCTION__); 1073 1074 priv->flags |= ASYNC_SPD_CUST; 1075 priv->custom_divisor = 240; 1076 priv->force_baud = 38400; 1077 priv->force_rtscts = 1; 1078 } /* ftdi_HE_TIRA1_setup */ 1079 1080 /* 1081 * First port on JTAG adaptors such as Olimex arm-usb-ocd or the FIC/OpenMoko 1082 * Neo1973 Debug Board is reserved for JTAG interface and can be accessed from 1083 * userspace using openocd. 1084 */ 1085 static int ftdi_jtag_probe(struct usb_serial *serial) 1086 { 1087 struct usb_device *udev = serial->dev; 1088 struct usb_interface *interface = serial->interface; 1089 1090 dbg("%s",__FUNCTION__); 1091 1092 if (interface == udev->actconfig->interface[0]) { 1093 info("Ignoring serial port reserved for JTAG"); 1094 return -ENODEV; 1095 } 1096 1097 return 0; 1098 } 1099 1100 /* 1101 * The Matrix Orbital VK204-25-USB has an invalid IN endpoint. 1102 * We have to correct it if we want to read from it. 1103 */ 1104 static int ftdi_mtxorb_hack_setup(struct usb_serial *serial) 1105 { 1106 struct usb_host_endpoint *ep = serial->dev->ep_in[1]; 1107 struct usb_endpoint_descriptor *ep_desc = &ep->desc; 1108 1109 if (ep->enabled && ep_desc->wMaxPacketSize == 0) { 1110 ep_desc->wMaxPacketSize = 0x40; 1111 info("Fixing invalid wMaxPacketSize on read pipe"); 1112 } 1113 1114 return 0; 1115 } 1116 1117 /* ftdi_shutdown is called from usbserial:usb_serial_disconnect 1118 * it is called when the usb device is disconnected 1119 * 1120 * usbserial:usb_serial_disconnect 1121 * calls __serial_close for each open of the port 1122 * shutdown is called then (ie ftdi_shutdown) 1123 */ 1124 static void ftdi_shutdown (struct usb_serial *serial) 1125 { 1126 dbg("%s", __FUNCTION__); 1127 } 1128 1129 static int ftdi_sio_port_remove(struct usb_serial_port *port) 1130 { 1131 struct ftdi_private *priv = usb_get_serial_port_data(port); 1132 1133 dbg("%s", __FUNCTION__); 1134 1135 remove_sysfs_attrs(port); 1136 1137 /* all open ports are closed at this point 1138 * (by usbserial.c:__serial_close, which calls ftdi_close) 1139 */ 1140 1141 if (priv) { 1142 usb_set_serial_port_data(port, NULL); 1143 kfree(priv); 1144 } 1145 1146 return 0; 1147 } 1148 1149 static int ftdi_open (struct usb_serial_port *port, struct file *filp) 1150 { /* ftdi_open */ 1151 struct usb_device *dev = port->serial->dev; 1152 struct ftdi_private *priv = usb_get_serial_port_data(port); 1153 unsigned long flags; 1154 1155 int result = 0; 1156 char buf[1]; /* Needed for the usb_control_msg I think */ 1157 1158 dbg("%s", __FUNCTION__); 1159 1160 spin_lock_irqsave(&priv->tx_lock, flags); 1161 priv->tx_bytes = 0; 1162 spin_unlock_irqrestore(&priv->tx_lock, flags); 1163 spin_lock_irqsave(&priv->rx_lock, flags); 1164 priv->rx_bytes = 0; 1165 spin_unlock_irqrestore(&priv->rx_lock, flags); 1166 1167 if (port->tty) 1168 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1169 1170 /* No error checking for this (will get errors later anyway) */ 1171 /* See ftdi_sio.h for description of what is reset */ 1172 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1173 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE, 1174 FTDI_SIO_RESET_SIO, 1175 priv->interface, buf, 0, WDR_TIMEOUT); 1176 1177 /* Termios defaults are set by usb_serial_init. We don't change 1178 port->tty->termios - this would loose speed settings, etc. 1179 This is same behaviour as serial.c/rs_open() - Kuba */ 1180 1181 /* ftdi_set_termios will send usb control messages */ 1182 if (port->tty) 1183 ftdi_set_termios(port, port->tty->termios); 1184 1185 /* FIXME: Flow control might be enabled, so it should be checked - 1186 we have no control of defaults! */ 1187 /* Turn on RTS and DTR since we are not flow controlling by default */ 1188 set_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1189 1190 /* Not throttled */ 1191 spin_lock_irqsave(&priv->rx_lock, flags); 1192 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 1193 spin_unlock_irqrestore(&priv->rx_lock, flags); 1194 1195 /* Start reading from the device */ 1196 priv->rx_processed = 0; 1197 usb_fill_bulk_urb(port->read_urb, dev, 1198 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress), 1199 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, 1200 ftdi_read_bulk_callback, port); 1201 result = usb_submit_urb(port->read_urb, GFP_KERNEL); 1202 if (result) 1203 err("%s - failed submitting read urb, error %d", __FUNCTION__, result); 1204 1205 1206 return result; 1207 } /* ftdi_open */ 1208 1209 1210 1211 /* 1212 * usbserial:__serial_close only calls ftdi_close if the point is open 1213 * 1214 * This only gets called when it is the last close 1215 * 1216 * 1217 */ 1218 1219 static void ftdi_close (struct usb_serial_port *port, struct file *filp) 1220 { /* ftdi_close */ 1221 unsigned int c_cflag = port->tty->termios->c_cflag; 1222 struct ftdi_private *priv = usb_get_serial_port_data(port); 1223 char buf[1]; 1224 1225 dbg("%s", __FUNCTION__); 1226 1227 mutex_lock(&port->serial->disc_mutex); 1228 if (c_cflag & HUPCL && !port->serial->disconnected){ 1229 /* Disable flow control */ 1230 if (usb_control_msg(port->serial->dev, 1231 usb_sndctrlpipe(port->serial->dev, 0), 1232 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1233 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1234 0, priv->interface, buf, 0, 1235 WDR_TIMEOUT) < 0) { 1236 err("error from flowcontrol urb"); 1237 } 1238 1239 /* drop RTS and DTR */ 1240 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1241 } /* Note change no line if hupcl is off */ 1242 mutex_unlock(&port->serial->disc_mutex); 1243 1244 /* cancel any scheduled reading */ 1245 cancel_delayed_work(&priv->rx_work); 1246 flush_scheduled_work(); 1247 1248 /* shutdown our bulk read */ 1249 usb_kill_urb(port->read_urb); 1250 } /* ftdi_close */ 1251 1252 1253 1254 /* The SIO requires the first byte to have: 1255 * B0 1 1256 * B1 0 1257 * B2..7 length of message excluding byte 0 1258 * 1259 * The new devices do not require this byte 1260 */ 1261 static int ftdi_write (struct usb_serial_port *port, 1262 const unsigned char *buf, int count) 1263 { /* ftdi_write */ 1264 struct ftdi_private *priv = usb_get_serial_port_data(port); 1265 struct urb *urb; 1266 unsigned char *buffer; 1267 int data_offset ; /* will be 1 for the SIO and 0 otherwise */ 1268 int status; 1269 int transfer_size; 1270 unsigned long flags; 1271 1272 dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count); 1273 1274 if (count == 0) { 1275 dbg("write request of 0 bytes"); 1276 return 0; 1277 } 1278 spin_lock_irqsave(&priv->tx_lock, flags); 1279 if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) { 1280 spin_unlock_irqrestore(&priv->tx_lock, flags); 1281 dbg("%s - write limit hit\n", __FUNCTION__); 1282 return 0; 1283 } 1284 priv->tx_outstanding_urbs++; 1285 spin_unlock_irqrestore(&priv->tx_lock, flags); 1286 1287 data_offset = priv->write_offset; 1288 dbg("data_offset set to %d",data_offset); 1289 1290 /* Determine total transfer size */ 1291 transfer_size = count; 1292 if (data_offset > 0) { 1293 /* Original sio needs control bytes too... */ 1294 transfer_size += (data_offset * 1295 ((count + (PKTSZ - 1 - data_offset)) / 1296 (PKTSZ - data_offset))); 1297 } 1298 1299 buffer = kmalloc (transfer_size, GFP_ATOMIC); 1300 if (!buffer) { 1301 err("%s ran out of kernel memory for urb ...", __FUNCTION__); 1302 count = -ENOMEM; 1303 goto error_no_buffer; 1304 } 1305 1306 urb = usb_alloc_urb(0, GFP_ATOMIC); 1307 if (!urb) { 1308 err("%s - no more free urbs", __FUNCTION__); 1309 count = -ENOMEM; 1310 goto error_no_urb; 1311 } 1312 1313 /* Copy data */ 1314 if (data_offset > 0) { 1315 /* Original sio requires control byte at start of each packet. */ 1316 int user_pktsz = PKTSZ - data_offset; 1317 int todo = count; 1318 unsigned char *first_byte = buffer; 1319 const unsigned char *current_position = buf; 1320 1321 while (todo > 0) { 1322 if (user_pktsz > todo) { 1323 user_pktsz = todo; 1324 } 1325 /* Write the control byte at the front of the packet*/ 1326 *first_byte = 1 | ((user_pktsz) << 2); 1327 /* Copy data for packet */ 1328 memcpy (first_byte + data_offset, 1329 current_position, user_pktsz); 1330 first_byte += user_pktsz + data_offset; 1331 current_position += user_pktsz; 1332 todo -= user_pktsz; 1333 } 1334 } else { 1335 /* No control byte required. */ 1336 /* Copy in the data to send */ 1337 memcpy (buffer, buf, count); 1338 } 1339 1340 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer); 1341 1342 /* fill the buffer and send it */ 1343 usb_fill_bulk_urb(urb, port->serial->dev, 1344 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress), 1345 buffer, transfer_size, 1346 ftdi_write_bulk_callback, port); 1347 1348 status = usb_submit_urb(urb, GFP_ATOMIC); 1349 if (status) { 1350 err("%s - failed submitting write urb, error %d", __FUNCTION__, status); 1351 count = status; 1352 goto error; 1353 } else { 1354 spin_lock_irqsave(&priv->tx_lock, flags); 1355 priv->tx_outstanding_bytes += count; 1356 priv->tx_bytes += count; 1357 spin_unlock_irqrestore(&priv->tx_lock, flags); 1358 } 1359 1360 /* we are done with this urb, so let the host driver 1361 * really free it when it is finished with it */ 1362 usb_free_urb(urb); 1363 1364 dbg("%s write returning: %d", __FUNCTION__, count); 1365 return count; 1366 error: 1367 usb_free_urb(urb); 1368 error_no_urb: 1369 kfree (buffer); 1370 error_no_buffer: 1371 spin_lock_irqsave(&priv->tx_lock, flags); 1372 priv->tx_outstanding_urbs--; 1373 spin_unlock_irqrestore(&priv->tx_lock, flags); 1374 return count; 1375 } /* ftdi_write */ 1376 1377 1378 /* This function may get called when the device is closed */ 1379 1380 static void ftdi_write_bulk_callback (struct urb *urb) 1381 { 1382 unsigned long flags; 1383 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1384 struct ftdi_private *priv; 1385 int data_offset; /* will be 1 for the SIO and 0 otherwise */ 1386 unsigned long countback; 1387 int status = urb->status; 1388 1389 /* free up the transfer buffer, as usb_free_urb() does not do this */ 1390 kfree (urb->transfer_buffer); 1391 1392 dbg("%s - port %d", __FUNCTION__, port->number); 1393 1394 if (status) { 1395 dbg("nonzero write bulk status received: %d", status); 1396 return; 1397 } 1398 1399 priv = usb_get_serial_port_data(port); 1400 if (!priv) { 1401 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1402 return; 1403 } 1404 /* account for transferred data */ 1405 countback = urb->actual_length; 1406 data_offset = priv->write_offset; 1407 if (data_offset > 0) { 1408 /* Subtract the control bytes */ 1409 countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ)); 1410 } 1411 spin_lock_irqsave(&priv->tx_lock, flags); 1412 --priv->tx_outstanding_urbs; 1413 priv->tx_outstanding_bytes -= countback; 1414 spin_unlock_irqrestore(&priv->tx_lock, flags); 1415 1416 usb_serial_port_softint(port); 1417 } /* ftdi_write_bulk_callback */ 1418 1419 1420 static int ftdi_write_room( struct usb_serial_port *port ) 1421 { 1422 struct ftdi_private *priv = usb_get_serial_port_data(port); 1423 int room; 1424 unsigned long flags; 1425 1426 dbg("%s - port %d", __FUNCTION__, port->number); 1427 1428 spin_lock_irqsave(&priv->tx_lock, flags); 1429 if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) { 1430 /* 1431 * We really can take anything the user throws at us 1432 * but let's pick a nice big number to tell the tty 1433 * layer that we have lots of free space 1434 */ 1435 room = 2048; 1436 } else { 1437 room = 0; 1438 } 1439 spin_unlock_irqrestore(&priv->tx_lock, flags); 1440 return room; 1441 } /* ftdi_write_room */ 1442 1443 1444 static int ftdi_chars_in_buffer (struct usb_serial_port *port) 1445 { /* ftdi_chars_in_buffer */ 1446 struct ftdi_private *priv = usb_get_serial_port_data(port); 1447 int buffered; 1448 unsigned long flags; 1449 1450 dbg("%s - port %d", __FUNCTION__, port->number); 1451 1452 spin_lock_irqsave(&priv->tx_lock, flags); 1453 buffered = (int)priv->tx_outstanding_bytes; 1454 spin_unlock_irqrestore(&priv->tx_lock, flags); 1455 if (buffered < 0) { 1456 err("%s outstanding tx bytes is negative!", __FUNCTION__); 1457 buffered = 0; 1458 } 1459 return buffered; 1460 } /* ftdi_chars_in_buffer */ 1461 1462 1463 1464 static void ftdi_read_bulk_callback (struct urb *urb) 1465 { /* ftdi_read_bulk_callback */ 1466 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1467 struct tty_struct *tty; 1468 struct ftdi_private *priv; 1469 unsigned long countread; 1470 unsigned long flags; 1471 int status = urb->status; 1472 1473 if (urb->number_of_packets > 0) { 1474 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__, 1475 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets ); 1476 err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags ); 1477 } 1478 1479 dbg("%s - port %d", __FUNCTION__, port->number); 1480 1481 if (port->open_count <= 0) 1482 return; 1483 1484 tty = port->tty; 1485 if (!tty) { 1486 dbg("%s - bad tty pointer - exiting",__FUNCTION__); 1487 return; 1488 } 1489 1490 priv = usb_get_serial_port_data(port); 1491 if (!priv) { 1492 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1493 return; 1494 } 1495 1496 if (urb != port->read_urb) { 1497 err("%s - Not my urb!", __FUNCTION__); 1498 } 1499 1500 if (status) { 1501 /* This will happen at close every time so it is a dbg not an err */ 1502 dbg("(this is ok on close) nonzero read bulk status received: " 1503 "%d", status); 1504 return; 1505 } 1506 1507 /* count data bytes, but not status bytes */ 1508 countread = urb->actual_length; 1509 countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ); 1510 spin_lock_irqsave(&priv->rx_lock, flags); 1511 priv->rx_bytes += countread; 1512 spin_unlock_irqrestore(&priv->rx_lock, flags); 1513 1514 ftdi_process_read(&priv->rx_work.work); 1515 1516 } /* ftdi_read_bulk_callback */ 1517 1518 1519 static void ftdi_process_read (struct work_struct *work) 1520 { /* ftdi_process_read */ 1521 struct ftdi_private *priv = 1522 container_of(work, struct ftdi_private, rx_work.work); 1523 struct usb_serial_port *port = priv->port; 1524 struct urb *urb; 1525 struct tty_struct *tty; 1526 char error_flag; 1527 unsigned char *data; 1528 1529 int i; 1530 int result; 1531 int need_flip; 1532 int packet_offset; 1533 unsigned long flags; 1534 1535 dbg("%s - port %d", __FUNCTION__, port->number); 1536 1537 if (port->open_count <= 0) 1538 return; 1539 1540 tty = port->tty; 1541 if (!tty) { 1542 dbg("%s - bad tty pointer - exiting",__FUNCTION__); 1543 return; 1544 } 1545 1546 priv = usb_get_serial_port_data(port); 1547 if (!priv) { 1548 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1549 return; 1550 } 1551 1552 urb = port->read_urb; 1553 if (!urb) { 1554 dbg("%s - bad read_urb pointer - exiting", __FUNCTION__); 1555 return; 1556 } 1557 1558 data = urb->transfer_buffer; 1559 1560 if (priv->rx_processed) { 1561 dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__, 1562 priv->rx_processed, 1563 urb->actual_length - priv->rx_processed); 1564 } else { 1565 /* The first two bytes of every read packet are status */ 1566 if (urb->actual_length > 2) { 1567 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 1568 } else { 1569 dbg("Status only: %03oo %03oo",data[0],data[1]); 1570 } 1571 } 1572 1573 1574 /* TO DO -- check for hung up line and handle appropriately: */ 1575 /* send hangup */ 1576 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */ 1577 /* if CD is dropped and the line is not CLOCAL then we should hangup */ 1578 1579 need_flip = 0; 1580 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) { 1581 int length; 1582 1583 /* Compare new line status to the old one, signal if different */ 1584 /* N.B. packet may be processed more than once, but differences 1585 * are only processed once. */ 1586 if (priv != NULL) { 1587 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK; 1588 if (new_status != priv->prev_status) { 1589 priv->diff_status |= new_status ^ priv->prev_status; 1590 wake_up_interruptible(&priv->delta_msr_wait); 1591 priv->prev_status = new_status; 1592 } 1593 } 1594 1595 length = min(PKTSZ, urb->actual_length-packet_offset)-2; 1596 if (length < 0) { 1597 err("%s - bad packet length: %d", __FUNCTION__, length+2); 1598 length = 0; 1599 } 1600 1601 if (priv->rx_flags & THROTTLED) { 1602 dbg("%s - throttled", __FUNCTION__); 1603 break; 1604 } 1605 if (tty_buffer_request_room(tty, length) < length) { 1606 /* break out & wait for throttling/unthrottling to happen */ 1607 dbg("%s - receive room low", __FUNCTION__); 1608 break; 1609 } 1610 1611 /* Handle errors and break */ 1612 error_flag = TTY_NORMAL; 1613 /* Although the device uses a bitmask and hence can have multiple */ 1614 /* errors on a packet - the order here sets the priority the */ 1615 /* error is returned to the tty layer */ 1616 1617 if ( data[packet_offset+1] & FTDI_RS_OE ) { 1618 error_flag = TTY_OVERRUN; 1619 dbg("OVERRRUN error"); 1620 } 1621 if ( data[packet_offset+1] & FTDI_RS_BI ) { 1622 error_flag = TTY_BREAK; 1623 dbg("BREAK received"); 1624 } 1625 if ( data[packet_offset+1] & FTDI_RS_PE ) { 1626 error_flag = TTY_PARITY; 1627 dbg("PARITY error"); 1628 } 1629 if ( data[packet_offset+1] & FTDI_RS_FE ) { 1630 error_flag = TTY_FRAME; 1631 dbg("FRAMING error"); 1632 } 1633 if (length > 0) { 1634 for (i = 2; i < length+2; i++) { 1635 /* Note that the error flag is duplicated for 1636 every character received since we don't know 1637 which character it applied to */ 1638 tty_insert_flip_char(tty, data[packet_offset+i], error_flag); 1639 } 1640 need_flip = 1; 1641 } 1642 1643 #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW 1644 /* if a parity error is detected you get status packets forever 1645 until a character is sent without a parity error. 1646 This doesn't work well since the application receives a never 1647 ending stream of bad data - even though new data hasn't been sent. 1648 Therefore I (bill) have taken this out. 1649 However - this might make sense for framing errors and so on 1650 so I am leaving the code in for now. 1651 */ 1652 else { 1653 if (error_flag != TTY_NORMAL){ 1654 dbg("error_flag is not normal"); 1655 /* In this case it is just status - if that is an error send a bad character */ 1656 if(tty->flip.count >= TTY_FLIPBUF_SIZE) { 1657 tty_flip_buffer_push(tty); 1658 } 1659 tty_insert_flip_char(tty, 0xff, error_flag); 1660 need_flip = 1; 1661 } 1662 } 1663 #endif 1664 } /* "for(packet_offset=0..." */ 1665 1666 /* Low latency */ 1667 if (need_flip) { 1668 tty_flip_buffer_push(tty); 1669 } 1670 1671 if (packet_offset < urb->actual_length) { 1672 /* not completely processed - record progress */ 1673 priv->rx_processed = packet_offset; 1674 dbg("%s - incomplete, %d bytes processed, %d remain", 1675 __FUNCTION__, packet_offset, 1676 urb->actual_length - packet_offset); 1677 /* check if we were throttled while processing */ 1678 spin_lock_irqsave(&priv->rx_lock, flags); 1679 if (priv->rx_flags & THROTTLED) { 1680 priv->rx_flags |= ACTUALLY_THROTTLED; 1681 spin_unlock_irqrestore(&priv->rx_lock, flags); 1682 dbg("%s - deferring remainder until unthrottled", 1683 __FUNCTION__); 1684 return; 1685 } 1686 spin_unlock_irqrestore(&priv->rx_lock, flags); 1687 /* if the port is closed stop trying to read */ 1688 if (port->open_count > 0){ 1689 /* delay processing of remainder */ 1690 schedule_delayed_work(&priv->rx_work, 1); 1691 } else { 1692 dbg("%s - port is closed", __FUNCTION__); 1693 } 1694 return; 1695 } 1696 1697 /* urb is completely processed */ 1698 priv->rx_processed = 0; 1699 1700 /* if the port is closed stop trying to read */ 1701 if (port->open_count > 0){ 1702 /* Continue trying to always read */ 1703 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 1704 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress), 1705 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, 1706 ftdi_read_bulk_callback, port); 1707 1708 result = usb_submit_urb(port->read_urb, GFP_ATOMIC); 1709 if (result) 1710 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1711 } 1712 1713 return; 1714 } /* ftdi_process_read */ 1715 1716 1717 static void ftdi_break_ctl( struct usb_serial_port *port, int break_state ) 1718 { 1719 struct ftdi_private *priv = usb_get_serial_port_data(port); 1720 __u16 urb_value = 0; 1721 char buf[1]; 1722 1723 /* break_state = -1 to turn on break, and 0 to turn off break */ 1724 /* see drivers/char/tty_io.c to see it used */ 1725 /* last_set_data_urb_value NEVER has the break bit set in it */ 1726 1727 if (break_state) { 1728 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK; 1729 } else { 1730 urb_value = priv->last_set_data_urb_value; 1731 } 1732 1733 1734 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), 1735 FTDI_SIO_SET_DATA_REQUEST, 1736 FTDI_SIO_SET_DATA_REQUEST_TYPE, 1737 urb_value , priv->interface, 1738 buf, 0, WDR_TIMEOUT) < 0) { 1739 err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state); 1740 } 1741 1742 dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value); 1743 1744 } 1745 1746 1747 /* old_termios contains the original termios settings and tty->termios contains 1748 * the new setting to be used 1749 * WARNING: set_termios calls this with old_termios in kernel space 1750 */ 1751 1752 static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios) 1753 { /* ftdi_termios */ 1754 struct usb_device *dev = port->serial->dev; 1755 struct ftdi_private *priv = usb_get_serial_port_data(port); 1756 struct ktermios *termios = port->tty->termios; 1757 unsigned int cflag = termios->c_cflag; 1758 __u16 urb_value; /* will hold the new flags */ 1759 char buf[1]; /* Perhaps I should dynamically alloc this? */ 1760 1761 // Added for xon/xoff support 1762 unsigned int iflag = termios->c_iflag; 1763 unsigned char vstop; 1764 unsigned char vstart; 1765 1766 dbg("%s", __FUNCTION__); 1767 1768 /* Force baud rate if this device requires it, unless it is set to B0. */ 1769 if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) { 1770 dbg("%s: forcing baud rate for this device", __FUNCTION__); 1771 tty_encode_baud_rate(port->tty, priv->force_baud, 1772 priv->force_baud); 1773 } 1774 1775 /* Force RTS-CTS if this device requires it. */ 1776 if (priv->force_rtscts) { 1777 dbg("%s: forcing rtscts for this device", __FUNCTION__); 1778 termios->c_cflag |= CRTSCTS; 1779 } 1780 1781 cflag = termios->c_cflag; 1782 1783 /* FIXME -For this cut I don't care if the line is really changing or 1784 not - so just do the change regardless - should be able to 1785 compare old_termios and tty->termios */ 1786 /* NOTE These routines can get interrupted by 1787 ftdi_sio_read_bulk_callback - need to examine what this 1788 means - don't see any problems yet */ 1789 1790 /* Set number of data bits, parity, stop bits */ 1791 1792 termios->c_cflag &= ~CMSPAR; 1793 1794 urb_value = 0; 1795 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 : 1796 FTDI_SIO_SET_DATA_STOP_BITS_1); 1797 urb_value |= (cflag & PARENB ? 1798 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD : 1799 FTDI_SIO_SET_DATA_PARITY_EVEN) : 1800 FTDI_SIO_SET_DATA_PARITY_NONE); 1801 if (cflag & CSIZE) { 1802 switch (cflag & CSIZE) { 1803 case CS5: urb_value |= 5; dbg("Setting CS5"); break; 1804 case CS6: urb_value |= 6; dbg("Setting CS6"); break; 1805 case CS7: urb_value |= 7; dbg("Setting CS7"); break; 1806 case CS8: urb_value |= 8; dbg("Setting CS8"); break; 1807 default: 1808 err("CSIZE was set but not CS5-CS8"); 1809 } 1810 } 1811 1812 /* This is needed by the break command since it uses the same command - but is 1813 * or'ed with this value */ 1814 priv->last_set_data_urb_value = urb_value; 1815 1816 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1817 FTDI_SIO_SET_DATA_REQUEST, 1818 FTDI_SIO_SET_DATA_REQUEST_TYPE, 1819 urb_value , priv->interface, 1820 buf, 0, WDR_SHORT_TIMEOUT) < 0) { 1821 err("%s FAILED to set databits/stopbits/parity", __FUNCTION__); 1822 } 1823 1824 /* Now do the baudrate */ 1825 if ((cflag & CBAUD) == B0 ) { 1826 /* Disable flow control */ 1827 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1828 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1829 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1830 0, priv->interface, 1831 buf, 0, WDR_TIMEOUT) < 0) { 1832 err("%s error from disable flowcontrol urb", __FUNCTION__); 1833 } 1834 /* Drop RTS and DTR */ 1835 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1836 } else { 1837 /* set the baudrate determined before */ 1838 if (change_speed(port)) { 1839 err("%s urb failed to set baudrate", __FUNCTION__); 1840 } 1841 /* Ensure RTS and DTR are raised when baudrate changed from 0 */ 1842 if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) { 1843 set_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1844 } 1845 } 1846 1847 /* Set flow control */ 1848 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */ 1849 if (cflag & CRTSCTS) { 1850 dbg("%s Setting to CRTSCTS flow control", __FUNCTION__); 1851 if (usb_control_msg(dev, 1852 usb_sndctrlpipe(dev, 0), 1853 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1854 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1855 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface), 1856 buf, 0, WDR_TIMEOUT) < 0) { 1857 err("urb failed to set to rts/cts flow control"); 1858 } 1859 1860 } else { 1861 /* 1862 * Xon/Xoff code 1863 * 1864 * Check the IXOFF status in the iflag component of the termios structure 1865 * if IXOFF is not set, the pre-xon/xoff code is executed. 1866 */ 1867 if (iflag & IXOFF) { 1868 dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag); 1869 // Try to enable the XON/XOFF on the ftdi_sio 1870 // Set the vstart and vstop -- could have been done up above where 1871 // a lot of other dereferencing is done but that would be very 1872 // inefficient as vstart and vstop are not always needed 1873 vstart = termios->c_cc[VSTART]; 1874 vstop = termios->c_cc[VSTOP]; 1875 urb_value=(vstop << 8) | (vstart); 1876 1877 if (usb_control_msg(dev, 1878 usb_sndctrlpipe(dev, 0), 1879 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1880 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1881 urb_value , (FTDI_SIO_XON_XOFF_HS 1882 | priv->interface), 1883 buf, 0, WDR_TIMEOUT) < 0) { 1884 err("urb failed to set to xon/xoff flow control"); 1885 } 1886 } else { 1887 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */ 1888 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */ 1889 dbg("%s Turning off hardware flow control", __FUNCTION__); 1890 if (usb_control_msg(dev, 1891 usb_sndctrlpipe(dev, 0), 1892 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1893 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1894 0, priv->interface, 1895 buf, 0, WDR_TIMEOUT) < 0) { 1896 err("urb failed to clear flow control"); 1897 } 1898 } 1899 1900 } 1901 return; 1902 } /* ftdi_termios */ 1903 1904 1905 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file) 1906 { 1907 struct ftdi_private *priv = usb_get_serial_port_data(port); 1908 unsigned char buf[2]; 1909 int ret; 1910 1911 dbg("%s TIOCMGET", __FUNCTION__); 1912 switch (priv->chip_type) { 1913 case SIO: 1914 /* Request the status from the device */ 1915 if ((ret = usb_control_msg(port->serial->dev, 1916 usb_rcvctrlpipe(port->serial->dev, 0), 1917 FTDI_SIO_GET_MODEM_STATUS_REQUEST, 1918 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 1919 0, 0, 1920 buf, 1, WDR_TIMEOUT)) < 0 ) { 1921 err("%s Could not get modem status of device - err: %d", __FUNCTION__, 1922 ret); 1923 return(ret); 1924 } 1925 break; 1926 case FT8U232AM: 1927 case FT232BM: 1928 case FT2232C: 1929 case FT232RL: 1930 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same 1931 format as the data returned from the in point */ 1932 if ((ret = usb_control_msg(port->serial->dev, 1933 usb_rcvctrlpipe(port->serial->dev, 0), 1934 FTDI_SIO_GET_MODEM_STATUS_REQUEST, 1935 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 1936 0, priv->interface, 1937 buf, 2, WDR_TIMEOUT)) < 0 ) { 1938 err("%s Could not get modem status of device - err: %d", __FUNCTION__, 1939 ret); 1940 return(ret); 1941 } 1942 break; 1943 default: 1944 return -EFAULT; 1945 break; 1946 } 1947 1948 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) | 1949 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) | 1950 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) | 1951 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) | 1952 priv->last_dtr_rts; 1953 } 1954 1955 static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear) 1956 { 1957 dbg("%s TIOCMSET", __FUNCTION__); 1958 return update_mctrl(port, set, clear); 1959 } 1960 1961 1962 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) 1963 { 1964 struct ftdi_private *priv = usb_get_serial_port_data(port); 1965 1966 dbg("%s cmd 0x%04x", __FUNCTION__, cmd); 1967 1968 /* Based on code from acm.c and others */ 1969 switch (cmd) { 1970 1971 case TIOCGSERIAL: /* gets serial port data */ 1972 return get_serial_info(port, (struct serial_struct __user *) arg); 1973 1974 case TIOCSSERIAL: /* sets serial port data */ 1975 return set_serial_info(port, (struct serial_struct __user *) arg); 1976 1977 /* 1978 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1979 * - mask passed in arg for lines of interest 1980 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1981 * Caller should use TIOCGICOUNT to see which one it was. 1982 * 1983 * This code is borrowed from linux/drivers/char/serial.c 1984 */ 1985 case TIOCMIWAIT: 1986 while (priv != NULL) { 1987 interruptible_sleep_on(&priv->delta_msr_wait); 1988 /* see if a signal did it */ 1989 if (signal_pending(current)) 1990 return -ERESTARTSYS; 1991 else { 1992 char diff = priv->diff_status; 1993 1994 if (diff == 0) { 1995 return -EIO; /* no change => error */ 1996 } 1997 1998 /* Consume all events */ 1999 priv->diff_status = 0; 2000 2001 /* Return 0 if caller wanted to know about these bits */ 2002 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) || 2003 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) || 2004 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) || 2005 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) { 2006 return 0; 2007 } 2008 /* 2009 * Otherwise caller can't care less about what happened, 2010 * and so we continue to wait for more events. 2011 */ 2012 } 2013 } 2014 return(0); 2015 break; 2016 default: 2017 break; 2018 2019 } 2020 2021 2022 /* This is not necessarily an error - turns out the higher layers will do 2023 * some ioctls itself (see comment above) 2024 */ 2025 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd); 2026 2027 return(-ENOIOCTLCMD); 2028 } /* ftdi_ioctl */ 2029 2030 2031 static void ftdi_throttle (struct usb_serial_port *port) 2032 { 2033 struct ftdi_private *priv = usb_get_serial_port_data(port); 2034 unsigned long flags; 2035 2036 dbg("%s - port %d", __FUNCTION__, port->number); 2037 2038 spin_lock_irqsave(&priv->rx_lock, flags); 2039 priv->rx_flags |= THROTTLED; 2040 spin_unlock_irqrestore(&priv->rx_lock, flags); 2041 } 2042 2043 2044 static void ftdi_unthrottle (struct usb_serial_port *port) 2045 { 2046 struct ftdi_private *priv = usb_get_serial_port_data(port); 2047 int actually_throttled; 2048 unsigned long flags; 2049 2050 dbg("%s - port %d", __FUNCTION__, port->number); 2051 2052 spin_lock_irqsave(&priv->rx_lock, flags); 2053 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; 2054 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 2055 spin_unlock_irqrestore(&priv->rx_lock, flags); 2056 2057 if (actually_throttled) 2058 schedule_delayed_work(&priv->rx_work, 0); 2059 } 2060 2061 static int __init ftdi_init (void) 2062 { 2063 int retval; 2064 2065 dbg("%s", __FUNCTION__); 2066 if (vendor > 0 && product > 0) { 2067 /* Add user specified VID/PID to reserved element of table. */ 2068 int i; 2069 for (i = 0; id_table_combined[i].idVendor; i++) 2070 ; 2071 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 2072 id_table_combined[i].idVendor = vendor; 2073 id_table_combined[i].idProduct = product; 2074 } 2075 retval = usb_serial_register(&ftdi_sio_device); 2076 if (retval) 2077 goto failed_sio_register; 2078 retval = usb_register(&ftdi_driver); 2079 if (retval) 2080 goto failed_usb_register; 2081 2082 info(DRIVER_VERSION ":" DRIVER_DESC); 2083 return 0; 2084 failed_usb_register: 2085 usb_serial_deregister(&ftdi_sio_device); 2086 failed_sio_register: 2087 return retval; 2088 } 2089 2090 2091 static void __exit ftdi_exit (void) 2092 { 2093 2094 dbg("%s", __FUNCTION__); 2095 2096 usb_deregister (&ftdi_driver); 2097 usb_serial_deregister (&ftdi_sio_device); 2098 2099 } 2100 2101 2102 module_init(ftdi_init); 2103 module_exit(ftdi_exit); 2104 2105 MODULE_AUTHOR( DRIVER_AUTHOR ); 2106 MODULE_DESCRIPTION( DRIVER_DESC ); 2107 MODULE_LICENSE("GPL"); 2108 2109 module_param(debug, bool, S_IRUGO | S_IWUSR); 2110 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2111 module_param(vendor, ushort, 0); 2112 MODULE_PARM_DESC(vendor, "User specified vendor ID (default=" 2113 __MODULE_STRING(FTDI_VID)")"); 2114 module_param(product, ushort, 0); 2115 MODULE_PARM_DESC(vendor, "User specified product ID"); 2116 2117