Version:  2.0.40 2.2.26 2.4.37 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

Linux/drivers/usb/serial/ti_usb_3410_5052.c

  1 /*
  2  * TI 3410/5052 USB Serial Driver
  3  *
  4  * Copyright (C) 2004 Texas Instruments
  5  *
  6  * This driver is based on the Linux io_ti driver, which is
  7  *   Copyright (C) 2000-2002 Inside Out Networks
  8  *   Copyright (C) 2001-2002 Greg Kroah-Hartman
  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  * For questions or problems with this driver, contact Texas Instruments
 16  * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
 17  * Peter Berger <pberger@brimson.com>.
 18  */
 19 
 20 #include <linux/kernel.h>
 21 #include <linux/errno.h>
 22 #include <linux/firmware.h>
 23 #include <linux/slab.h>
 24 #include <linux/tty.h>
 25 #include <linux/tty_driver.h>
 26 #include <linux/tty_flip.h>
 27 #include <linux/module.h>
 28 #include <linux/spinlock.h>
 29 #include <linux/ioctl.h>
 30 #include <linux/serial.h>
 31 #include <linux/kfifo.h>
 32 #include <linux/mutex.h>
 33 #include <linux/uaccess.h>
 34 #include <linux/usb.h>
 35 #include <linux/usb/serial.h>
 36 
 37 /* Configuration ids */
 38 #define TI_BOOT_CONFIG                  1
 39 #define TI_ACTIVE_CONFIG                2
 40 
 41 /* Vendor and product ids */
 42 #define TI_VENDOR_ID                    0x0451
 43 #define IBM_VENDOR_ID                   0x04b3
 44 #define TI_3410_PRODUCT_ID              0x3410
 45 #define IBM_4543_PRODUCT_ID             0x4543
 46 #define IBM_454B_PRODUCT_ID             0x454b
 47 #define IBM_454C_PRODUCT_ID             0x454c
 48 #define TI_3410_EZ430_ID                0xF430  /* TI ez430 development tool */
 49 #define TI_5052_BOOT_PRODUCT_ID         0x5052  /* no EEPROM, no firmware */
 50 #define TI_5152_BOOT_PRODUCT_ID         0x5152  /* no EEPROM, no firmware */
 51 #define TI_5052_EEPROM_PRODUCT_ID       0x505A  /* EEPROM, no firmware */
 52 #define TI_5052_FIRMWARE_PRODUCT_ID     0x505F  /* firmware is running */
 53 #define FRI2_PRODUCT_ID                 0x5053  /* Fish River Island II */
 54 
 55 /* Multi-Tech vendor and product ids */
 56 #define MTS_VENDOR_ID                   0x06E0
 57 #define MTS_GSM_NO_FW_PRODUCT_ID        0xF108
 58 #define MTS_CDMA_NO_FW_PRODUCT_ID       0xF109
 59 #define MTS_CDMA_PRODUCT_ID             0xF110
 60 #define MTS_GSM_PRODUCT_ID              0xF111
 61 #define MTS_EDGE_PRODUCT_ID             0xF112
 62 #define MTS_MT9234MU_PRODUCT_ID         0xF114
 63 #define MTS_MT9234ZBA_PRODUCT_ID        0xF115
 64 #define MTS_MT9234ZBAOLD_PRODUCT_ID     0x0319
 65 
 66 /* Abbott Diabetics vendor and product ids */
 67 #define ABBOTT_VENDOR_ID                0x1a61
 68 #define ABBOTT_STEREO_PLUG_ID           0x3410
 69 #define ABBOTT_PRODUCT_ID               ABBOTT_STEREO_PLUG_ID
 70 #define ABBOTT_STRIP_PORT_ID            0x3420
 71 
 72 /* Honeywell vendor and product IDs */
 73 #define HONEYWELL_VENDOR_ID             0x10ac
 74 #define HONEYWELL_HGI80_PRODUCT_ID      0x0102  /* Honeywell HGI80 */
 75 
 76 /* Moxa UPORT 11x0 vendor and product IDs */
 77 #define MXU1_VENDOR_ID                          0x110a
 78 #define MXU1_1110_PRODUCT_ID                    0x1110
 79 #define MXU1_1130_PRODUCT_ID                    0x1130
 80 #define MXU1_1150_PRODUCT_ID                    0x1150
 81 #define MXU1_1151_PRODUCT_ID                    0x1151
 82 #define MXU1_1131_PRODUCT_ID                    0x1131
 83 
 84 /* Commands */
 85 #define TI_GET_VERSION                  0x01
 86 #define TI_GET_PORT_STATUS              0x02
 87 #define TI_GET_PORT_DEV_INFO            0x03
 88 #define TI_GET_CONFIG                   0x04
 89 #define TI_SET_CONFIG                   0x05
 90 #define TI_OPEN_PORT                    0x06
 91 #define TI_CLOSE_PORT                   0x07
 92 #define TI_START_PORT                   0x08
 93 #define TI_STOP_PORT                    0x09
 94 #define TI_TEST_PORT                    0x0A
 95 #define TI_PURGE_PORT                   0x0B
 96 #define TI_RESET_EXT_DEVICE             0x0C
 97 #define TI_WRITE_DATA                   0x80
 98 #define TI_READ_DATA                    0x81
 99 #define TI_REQ_TYPE_CLASS               0x82
100 
101 /* Module identifiers */
102 #define TI_I2C_PORT                     0x01
103 #define TI_IEEE1284_PORT                0x02
104 #define TI_UART1_PORT                   0x03
105 #define TI_UART2_PORT                   0x04
106 #define TI_RAM_PORT                     0x05
107 
108 /* Modem status */
109 #define TI_MSR_DELTA_CTS                0x01
110 #define TI_MSR_DELTA_DSR                0x02
111 #define TI_MSR_DELTA_RI                 0x04
112 #define TI_MSR_DELTA_CD                 0x08
113 #define TI_MSR_CTS                      0x10
114 #define TI_MSR_DSR                      0x20
115 #define TI_MSR_RI                       0x40
116 #define TI_MSR_CD                       0x80
117 #define TI_MSR_DELTA_MASK               0x0F
118 #define TI_MSR_MASK                     0xF0
119 
120 /* Line status */
121 #define TI_LSR_OVERRUN_ERROR            0x01
122 #define TI_LSR_PARITY_ERROR             0x02
123 #define TI_LSR_FRAMING_ERROR            0x04
124 #define TI_LSR_BREAK                    0x08
125 #define TI_LSR_ERROR                    0x0F
126 #define TI_LSR_RX_FULL                  0x10
127 #define TI_LSR_TX_EMPTY                 0x20
128 
129 /* Line control */
130 #define TI_LCR_BREAK                    0x40
131 
132 /* Modem control */
133 #define TI_MCR_LOOP                     0x04
134 #define TI_MCR_DTR                      0x10
135 #define TI_MCR_RTS                      0x20
136 
137 /* Mask settings */
138 #define TI_UART_ENABLE_RTS_IN           0x0001
139 #define TI_UART_DISABLE_RTS             0x0002
140 #define TI_UART_ENABLE_PARITY_CHECKING  0x0008
141 #define TI_UART_ENABLE_DSR_OUT          0x0010
142 #define TI_UART_ENABLE_CTS_OUT          0x0020
143 #define TI_UART_ENABLE_X_OUT            0x0040
144 #define TI_UART_ENABLE_XA_OUT           0x0080
145 #define TI_UART_ENABLE_X_IN             0x0100
146 #define TI_UART_ENABLE_DTR_IN           0x0800
147 #define TI_UART_DISABLE_DTR             0x1000
148 #define TI_UART_ENABLE_MS_INTS          0x2000
149 #define TI_UART_ENABLE_AUTO_START_DMA   0x4000
150 
151 /* Parity */
152 #define TI_UART_NO_PARITY               0x00
153 #define TI_UART_ODD_PARITY              0x01
154 #define TI_UART_EVEN_PARITY             0x02
155 #define TI_UART_MARK_PARITY             0x03
156 #define TI_UART_SPACE_PARITY            0x04
157 
158 /* Stop bits */
159 #define TI_UART_1_STOP_BITS             0x00
160 #define TI_UART_1_5_STOP_BITS           0x01
161 #define TI_UART_2_STOP_BITS             0x02
162 
163 /* Bits per character */
164 #define TI_UART_5_DATA_BITS             0x00
165 #define TI_UART_6_DATA_BITS             0x01
166 #define TI_UART_7_DATA_BITS             0x02
167 #define TI_UART_8_DATA_BITS             0x03
168 
169 /* 232/485 modes */
170 #define TI_UART_232                     0x00
171 #define TI_UART_485_RECEIVER_DISABLED   0x01
172 #define TI_UART_485_RECEIVER_ENABLED    0x02
173 
174 /* Pipe transfer mode and timeout */
175 #define TI_PIPE_MODE_CONTINUOUS         0x01
176 #define TI_PIPE_MODE_MASK               0x03
177 #define TI_PIPE_TIMEOUT_MASK            0x7C
178 #define TI_PIPE_TIMEOUT_ENABLE          0x80
179 
180 /* Config struct */
181 struct ti_uart_config {
182         __be16  wBaudRate;
183         __be16  wFlags;
184         u8      bDataBits;
185         u8      bParity;
186         u8      bStopBits;
187         char    cXon;
188         char    cXoff;
189         u8      bUartMode;
190 } __packed;
191 
192 /* Get port status */
193 struct ti_port_status {
194         u8 bCmdCode;
195         u8 bModuleId;
196         u8 bErrorCode;
197         u8 bMSR;
198         u8 bLSR;
199 } __packed;
200 
201 /* Purge modes */
202 #define TI_PURGE_OUTPUT                 0x00
203 #define TI_PURGE_INPUT                  0x80
204 
205 /* Read/Write data */
206 #define TI_RW_DATA_ADDR_SFR             0x10
207 #define TI_RW_DATA_ADDR_IDATA           0x20
208 #define TI_RW_DATA_ADDR_XDATA           0x30
209 #define TI_RW_DATA_ADDR_CODE            0x40
210 #define TI_RW_DATA_ADDR_GPIO            0x50
211 #define TI_RW_DATA_ADDR_I2C             0x60
212 #define TI_RW_DATA_ADDR_FLASH           0x70
213 #define TI_RW_DATA_ADDR_DSP             0x80
214 
215 #define TI_RW_DATA_UNSPECIFIED          0x00
216 #define TI_RW_DATA_BYTE                 0x01
217 #define TI_RW_DATA_WORD                 0x02
218 #define TI_RW_DATA_DOUBLE_WORD          0x04
219 
220 struct ti_write_data_bytes {
221         u8      bAddrType;
222         u8      bDataType;
223         u8      bDataCounter;
224         __be16  wBaseAddrHi;
225         __be16  wBaseAddrLo;
226         u8      bData[0];
227 } __packed;
228 
229 struct ti_read_data_request {
230         __u8    bAddrType;
231         __u8    bDataType;
232         __u8    bDataCounter;
233         __be16  wBaseAddrHi;
234         __be16  wBaseAddrLo;
235 } __packed;
236 
237 struct ti_read_data_bytes {
238         __u8    bCmdCode;
239         __u8    bModuleId;
240         __u8    bErrorCode;
241         __u8    bData[0];
242 } __packed;
243 
244 /* Interrupt struct */
245 struct ti_interrupt {
246         __u8    bICode;
247         __u8    bIInfo;
248 } __packed;
249 
250 /* Interrupt codes */
251 #define TI_CODE_HARDWARE_ERROR          0xFF
252 #define TI_CODE_DATA_ERROR              0x03
253 #define TI_CODE_MODEM_STATUS            0x04
254 
255 /* Download firmware max packet size */
256 #define TI_DOWNLOAD_MAX_PACKET_SIZE     64
257 
258 /* Firmware image header */
259 struct ti_firmware_header {
260         __le16  wLength;
261         u8      bCheckSum;
262 } __packed;
263 
264 /* UART addresses */
265 #define TI_UART1_BASE_ADDR              0xFFA0  /* UART 1 base address */
266 #define TI_UART2_BASE_ADDR              0xFFB0  /* UART 2 base address */
267 #define TI_UART_OFFSET_LCR              0x0002  /* UART MCR register offset */
268 #define TI_UART_OFFSET_MCR              0x0004  /* UART MCR register offset */
269 
270 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
271 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
272 
273 #define TI_FIRMWARE_BUF_SIZE    16284
274 
275 #define TI_TRANSFER_TIMEOUT     2
276 
277 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
278 
279 /* read urb states */
280 #define TI_READ_URB_RUNNING     0
281 #define TI_READ_URB_STOPPING    1
282 #define TI_READ_URB_STOPPED     2
283 
284 #define TI_EXTRA_VID_PID_COUNT  5
285 
286 struct ti_port {
287         int                     tp_is_open;
288         u8                      tp_msr;
289         u8                      tp_shadow_mcr;
290         u8                      tp_uart_mode;   /* 232 or 485 modes */
291         unsigned int            tp_uart_base_addr;
292         struct ti_device        *tp_tdev;
293         struct usb_serial_port  *tp_port;
294         spinlock_t              tp_lock;
295         int                     tp_read_urb_state;
296         int                     tp_write_urb_in_use;
297 };
298 
299 struct ti_device {
300         struct mutex            td_open_close_lock;
301         int                     td_open_port_count;
302         struct usb_serial       *td_serial;
303         int                     td_is_3410;
304         bool                    td_rs485_only;
305 };
306 
307 static int ti_startup(struct usb_serial *serial);
308 static void ti_release(struct usb_serial *serial);
309 static int ti_port_probe(struct usb_serial_port *port);
310 static int ti_port_remove(struct usb_serial_port *port);
311 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
312 static void ti_close(struct usb_serial_port *port);
313 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
314                 const unsigned char *data, int count);
315 static int ti_write_room(struct tty_struct *tty);
316 static int ti_chars_in_buffer(struct tty_struct *tty);
317 static bool ti_tx_empty(struct usb_serial_port *port);
318 static void ti_throttle(struct tty_struct *tty);
319 static void ti_unthrottle(struct tty_struct *tty);
320 static int ti_ioctl(struct tty_struct *tty,
321                 unsigned int cmd, unsigned long arg);
322 static void ti_set_termios(struct tty_struct *tty,
323                 struct usb_serial_port *port, struct ktermios *old_termios);
324 static int ti_tiocmget(struct tty_struct *tty);
325 static int ti_tiocmset(struct tty_struct *tty,
326                 unsigned int set, unsigned int clear);
327 static void ti_break(struct tty_struct *tty, int break_state);
328 static void ti_interrupt_callback(struct urb *urb);
329 static void ti_bulk_in_callback(struct urb *urb);
330 static void ti_bulk_out_callback(struct urb *urb);
331 
332 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
333                 int length);
334 static void ti_send(struct ti_port *tport);
335 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
336 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
337 static int ti_get_serial_info(struct ti_port *tport,
338         struct serial_struct __user *ret_arg);
339 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
340         struct serial_struct __user *new_arg);
341 static void ti_handle_new_msr(struct ti_port *tport, u8 msr);
342 
343 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
344 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
345 
346 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
347         __u16 moduleid, __u16 value, __u8 *data, int size);
348 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
349         __u16 moduleid, __u16 value, __u8 *data, int size);
350 
351 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
352                          unsigned long addr, u8 mask, u8 byte);
353 
354 static int ti_download_firmware(struct ti_device *tdev);
355 
356 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
357 
358 static const struct usb_device_id ti_id_table_3410[] = {
359         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
360         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
361         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
362         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
363         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
364         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
365         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
366         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
367         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
368         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
369         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
370         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
371         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
372         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
373         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
374         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
375         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
376         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
377         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
378         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
379         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
380         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
381         { }     /* terminator */
382 };
383 
384 static const struct usb_device_id ti_id_table_5052[] = {
385         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
386         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
387         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
388         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
389         { }
390 };
391 
392 static const struct usb_device_id ti_id_table_combined[] = {
393         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
394         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
395         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
396         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
397         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
398         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
399         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
400         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
401         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
402         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
403         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
404         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
405         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
406         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
407         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
408         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
409         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
410         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
411         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
412         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
413         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
414         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
415         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
416         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
417         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
418         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
419         { }     /* terminator */
420 };
421 
422 static struct usb_serial_driver ti_1port_device = {
423         .driver = {
424                 .owner          = THIS_MODULE,
425                 .name           = "ti_usb_3410_5052_1",
426         },
427         .description            = "TI USB 3410 1 port adapter",
428         .id_table               = ti_id_table_3410,
429         .num_ports              = 1,
430         .attach                 = ti_startup,
431         .release                = ti_release,
432         .port_probe             = ti_port_probe,
433         .port_remove            = ti_port_remove,
434         .open                   = ti_open,
435         .close                  = ti_close,
436         .write                  = ti_write,
437         .write_room             = ti_write_room,
438         .chars_in_buffer        = ti_chars_in_buffer,
439         .tx_empty               = ti_tx_empty,
440         .throttle               = ti_throttle,
441         .unthrottle             = ti_unthrottle,
442         .ioctl                  = ti_ioctl,
443         .set_termios            = ti_set_termios,
444         .tiocmget               = ti_tiocmget,
445         .tiocmset               = ti_tiocmset,
446         .tiocmiwait             = usb_serial_generic_tiocmiwait,
447         .get_icount             = usb_serial_generic_get_icount,
448         .break_ctl              = ti_break,
449         .read_int_callback      = ti_interrupt_callback,
450         .read_bulk_callback     = ti_bulk_in_callback,
451         .write_bulk_callback    = ti_bulk_out_callback,
452 };
453 
454 static struct usb_serial_driver ti_2port_device = {
455         .driver = {
456                 .owner          = THIS_MODULE,
457                 .name           = "ti_usb_3410_5052_2",
458         },
459         .description            = "TI USB 5052 2 port adapter",
460         .id_table               = ti_id_table_5052,
461         .num_ports              = 2,
462         .attach                 = ti_startup,
463         .release                = ti_release,
464         .port_probe             = ti_port_probe,
465         .port_remove            = ti_port_remove,
466         .open                   = ti_open,
467         .close                  = ti_close,
468         .write                  = ti_write,
469         .write_room             = ti_write_room,
470         .chars_in_buffer        = ti_chars_in_buffer,
471         .tx_empty               = ti_tx_empty,
472         .throttle               = ti_throttle,
473         .unthrottle             = ti_unthrottle,
474         .ioctl                  = ti_ioctl,
475         .set_termios            = ti_set_termios,
476         .tiocmget               = ti_tiocmget,
477         .tiocmset               = ti_tiocmset,
478         .tiocmiwait             = usb_serial_generic_tiocmiwait,
479         .get_icount             = usb_serial_generic_get_icount,
480         .break_ctl              = ti_break,
481         .read_int_callback      = ti_interrupt_callback,
482         .read_bulk_callback     = ti_bulk_in_callback,
483         .write_bulk_callback    = ti_bulk_out_callback,
484 };
485 
486 static struct usb_serial_driver * const serial_drivers[] = {
487         &ti_1port_device, &ti_2port_device, NULL
488 };
489 
490 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
491 MODULE_DESCRIPTION(TI_DRIVER_DESC);
492 MODULE_LICENSE("GPL");
493 
494 MODULE_FIRMWARE("ti_3410.fw");
495 MODULE_FIRMWARE("ti_5052.fw");
496 MODULE_FIRMWARE("mts_cdma.fw");
497 MODULE_FIRMWARE("mts_gsm.fw");
498 MODULE_FIRMWARE("mts_edge.fw");
499 MODULE_FIRMWARE("mts_mt9234mu.fw");
500 MODULE_FIRMWARE("mts_mt9234zba.fw");
501 MODULE_FIRMWARE("moxa/moxa-1110.fw");
502 MODULE_FIRMWARE("moxa/moxa-1130.fw");
503 MODULE_FIRMWARE("moxa/moxa-1131.fw");
504 MODULE_FIRMWARE("moxa/moxa-1150.fw");
505 MODULE_FIRMWARE("moxa/moxa-1151.fw");
506 
507 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
508 MODULE_PARM_DESC(closing_wait,
509     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
510 
511 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
512 
513 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
514 
515 static int ti_startup(struct usb_serial *serial)
516 {
517         struct ti_device *tdev;
518         struct usb_device *dev = serial->dev;
519         struct usb_host_interface *cur_altsetting;
520         int num_endpoints;
521         u16 vid, pid;
522         int status;
523 
524         dev_dbg(&dev->dev,
525                 "%s - product 0x%4X, num configurations %d, configuration value %d\n",
526                 __func__, le16_to_cpu(dev->descriptor.idProduct),
527                 dev->descriptor.bNumConfigurations,
528                 dev->actconfig->desc.bConfigurationValue);
529 
530         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
531         if (!tdev)
532                 return -ENOMEM;
533 
534         mutex_init(&tdev->td_open_close_lock);
535         tdev->td_serial = serial;
536         usb_set_serial_data(serial, tdev);
537 
538         /* determine device type */
539         if (serial->type == &ti_1port_device)
540                 tdev->td_is_3410 = 1;
541         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
542                 tdev->td_is_3410 ? "3410" : "5052");
543 
544         vid = le16_to_cpu(dev->descriptor.idVendor);
545         pid = le16_to_cpu(dev->descriptor.idProduct);
546         if (vid == MXU1_VENDOR_ID) {
547                 switch (pid) {
548                 case MXU1_1130_PRODUCT_ID:
549                 case MXU1_1131_PRODUCT_ID:
550                         tdev->td_rs485_only = true;
551                         break;
552                 }
553         }
554 
555         cur_altsetting = serial->interface->cur_altsetting;
556         num_endpoints = cur_altsetting->desc.bNumEndpoints;
557 
558         /* if we have only 1 configuration and 1 endpoint, download firmware */
559         if (dev->descriptor.bNumConfigurations == 1 && num_endpoints == 1) {
560                 status = ti_download_firmware(tdev);
561 
562                 if (status != 0)
563                         goto free_tdev;
564 
565                 /* 3410 must be reset, 5052 resets itself */
566                 if (tdev->td_is_3410) {
567                         msleep_interruptible(100);
568                         usb_reset_device(dev);
569                 }
570 
571                 status = -ENODEV;
572                 goto free_tdev;
573         }
574 
575         /* the second configuration must be set */
576         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
577                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
578                 status = status ? status : -ENODEV;
579                 goto free_tdev;
580         }
581 
582         return 0;
583 
584 free_tdev:
585         kfree(tdev);
586         usb_set_serial_data(serial, NULL);
587         return status;
588 }
589 
590 
591 static void ti_release(struct usb_serial *serial)
592 {
593         struct ti_device *tdev = usb_get_serial_data(serial);
594 
595         kfree(tdev);
596 }
597 
598 static int ti_port_probe(struct usb_serial_port *port)
599 {
600         struct ti_port *tport;
601 
602         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
603         if (!tport)
604                 return -ENOMEM;
605 
606         spin_lock_init(&tport->tp_lock);
607         if (port == port->serial->port[0])
608                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
609         else
610                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
611         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
612         tport->tp_port = port;
613         tport->tp_tdev = usb_get_serial_data(port->serial);
614 
615         if (tport->tp_tdev->td_rs485_only)
616                 tport->tp_uart_mode = TI_UART_485_RECEIVER_DISABLED;
617         else
618                 tport->tp_uart_mode = TI_UART_232;
619 
620         usb_set_serial_port_data(port, tport);
621 
622         port->port.drain_delay = 3;
623 
624         return 0;
625 }
626 
627 static int ti_port_remove(struct usb_serial_port *port)
628 {
629         struct ti_port *tport;
630 
631         tport = usb_get_serial_port_data(port);
632         kfree(tport);
633 
634         return 0;
635 }
636 
637 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
638 {
639         struct ti_port *tport = usb_get_serial_port_data(port);
640         struct ti_device *tdev;
641         struct usb_device *dev;
642         struct urb *urb;
643         int port_number;
644         int status;
645         u16 open_settings;
646 
647         open_settings = (TI_PIPE_MODE_CONTINUOUS |
648                          TI_PIPE_TIMEOUT_ENABLE |
649                          (TI_TRANSFER_TIMEOUT << 2));
650 
651         dev = port->serial->dev;
652         tdev = tport->tp_tdev;
653 
654         /* only one open on any port on a device at a time */
655         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
656                 return -ERESTARTSYS;
657 
658         port_number = port->port_number;
659 
660         tport->tp_msr = 0;
661         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
662 
663         /* start interrupt urb the first time a port is opened on this device */
664         if (tdev->td_open_port_count == 0) {
665                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
666                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
667                 if (!urb) {
668                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
669                         status = -EINVAL;
670                         goto release_lock;
671                 }
672                 urb->context = tdev;
673                 status = usb_submit_urb(urb, GFP_KERNEL);
674                 if (status) {
675                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
676                         goto release_lock;
677                 }
678         }
679 
680         if (tty)
681                 ti_set_termios(tty, port, &tty->termios);
682 
683         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
684                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
685         if (status) {
686                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
687                         __func__, status);
688                 goto unlink_int_urb;
689         }
690 
691         status = ti_command_out_sync(tdev, TI_START_PORT,
692                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
693         if (status) {
694                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
695                                                         __func__, status);
696                 goto unlink_int_urb;
697         }
698 
699         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
700                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
701         if (status) {
702                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
703                                                         __func__, status);
704                 goto unlink_int_urb;
705         }
706         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
707                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
708         if (status) {
709                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
710                                                         __func__, status);
711                 goto unlink_int_urb;
712         }
713 
714         /* reset the data toggle on the bulk endpoints to work around bug in
715          * host controllers where things get out of sync some times */
716         usb_clear_halt(dev, port->write_urb->pipe);
717         usb_clear_halt(dev, port->read_urb->pipe);
718 
719         if (tty)
720                 ti_set_termios(tty, port, &tty->termios);
721 
722         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
723                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
724         if (status) {
725                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
726                                                         __func__, status);
727                 goto unlink_int_urb;
728         }
729 
730         status = ti_command_out_sync(tdev, TI_START_PORT,
731                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
732         if (status) {
733                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
734                                                         __func__, status);
735                 goto unlink_int_urb;
736         }
737 
738         /* start read urb */
739         urb = port->read_urb;
740         if (!urb) {
741                 dev_err(&port->dev, "%s - no read urb\n", __func__);
742                 status = -EINVAL;
743                 goto unlink_int_urb;
744         }
745         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
746         urb->context = tport;
747         status = usb_submit_urb(urb, GFP_KERNEL);
748         if (status) {
749                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
750                                                         __func__, status);
751                 goto unlink_int_urb;
752         }
753 
754         tport->tp_is_open = 1;
755         ++tdev->td_open_port_count;
756 
757         goto release_lock;
758 
759 unlink_int_urb:
760         if (tdev->td_open_port_count == 0)
761                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
762 release_lock:
763         mutex_unlock(&tdev->td_open_close_lock);
764         return status;
765 }
766 
767 
768 static void ti_close(struct usb_serial_port *port)
769 {
770         struct ti_device *tdev;
771         struct ti_port *tport;
772         int port_number;
773         int status;
774         int do_unlock;
775         unsigned long flags;
776 
777         tdev = usb_get_serial_data(port->serial);
778         tport = usb_get_serial_port_data(port);
779 
780         tport->tp_is_open = 0;
781 
782         usb_kill_urb(port->read_urb);
783         usb_kill_urb(port->write_urb);
784         tport->tp_write_urb_in_use = 0;
785         spin_lock_irqsave(&tport->tp_lock, flags);
786         kfifo_reset_out(&port->write_fifo);
787         spin_unlock_irqrestore(&tport->tp_lock, flags);
788 
789         port_number = port->port_number;
790 
791         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
792                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
793         if (status)
794                 dev_err(&port->dev,
795                         "%s - cannot send close port command, %d\n"
796                                                         , __func__, status);
797 
798         /* if mutex_lock is interrupted, continue anyway */
799         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
800         --tport->tp_tdev->td_open_port_count;
801         if (tport->tp_tdev->td_open_port_count <= 0) {
802                 /* last port is closed, shut down interrupt urb */
803                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
804                 tport->tp_tdev->td_open_port_count = 0;
805         }
806         if (do_unlock)
807                 mutex_unlock(&tdev->td_open_close_lock);
808 }
809 
810 
811 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
812                         const unsigned char *data, int count)
813 {
814         struct ti_port *tport = usb_get_serial_port_data(port);
815 
816         if (count == 0) {
817                 return 0;
818         }
819 
820         if (!tport->tp_is_open)
821                 return -ENODEV;
822 
823         count = kfifo_in_locked(&port->write_fifo, data, count,
824                                                         &tport->tp_lock);
825         ti_send(tport);
826 
827         return count;
828 }
829 
830 
831 static int ti_write_room(struct tty_struct *tty)
832 {
833         struct usb_serial_port *port = tty->driver_data;
834         struct ti_port *tport = usb_get_serial_port_data(port);
835         int room = 0;
836         unsigned long flags;
837 
838         spin_lock_irqsave(&tport->tp_lock, flags);
839         room = kfifo_avail(&port->write_fifo);
840         spin_unlock_irqrestore(&tport->tp_lock, flags);
841 
842         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
843         return room;
844 }
845 
846 
847 static int ti_chars_in_buffer(struct tty_struct *tty)
848 {
849         struct usb_serial_port *port = tty->driver_data;
850         struct ti_port *tport = usb_get_serial_port_data(port);
851         int chars = 0;
852         unsigned long flags;
853 
854         spin_lock_irqsave(&tport->tp_lock, flags);
855         chars = kfifo_len(&port->write_fifo);
856         spin_unlock_irqrestore(&tport->tp_lock, flags);
857 
858         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
859         return chars;
860 }
861 
862 static bool ti_tx_empty(struct usb_serial_port *port)
863 {
864         struct ti_port *tport = usb_get_serial_port_data(port);
865         int ret;
866         u8 lsr;
867 
868         ret = ti_get_lsr(tport, &lsr);
869         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
870                 return false;
871 
872         return true;
873 }
874 
875 static void ti_throttle(struct tty_struct *tty)
876 {
877         struct usb_serial_port *port = tty->driver_data;
878         struct ti_port *tport = usb_get_serial_port_data(port);
879 
880         if (I_IXOFF(tty) || C_CRTSCTS(tty))
881                 ti_stop_read(tport, tty);
882 
883 }
884 
885 
886 static void ti_unthrottle(struct tty_struct *tty)
887 {
888         struct usb_serial_port *port = tty->driver_data;
889         struct ti_port *tport = usb_get_serial_port_data(port);
890         int status;
891 
892         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
893                 status = ti_restart_read(tport, tty);
894                 if (status)
895                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
896                                                         __func__, status);
897         }
898 }
899 
900 static int ti_ioctl(struct tty_struct *tty,
901         unsigned int cmd, unsigned long arg)
902 {
903         struct usb_serial_port *port = tty->driver_data;
904         struct ti_port *tport = usb_get_serial_port_data(port);
905 
906         switch (cmd) {
907         case TIOCGSERIAL:
908                 return ti_get_serial_info(tport,
909                                 (struct serial_struct __user *)arg);
910         case TIOCSSERIAL:
911                 return ti_set_serial_info(tty, tport,
912                                 (struct serial_struct __user *)arg);
913         }
914         return -ENOIOCTLCMD;
915 }
916 
917 
918 static void ti_set_termios(struct tty_struct *tty,
919                 struct usb_serial_port *port, struct ktermios *old_termios)
920 {
921         struct ti_port *tport = usb_get_serial_port_data(port);
922         struct ti_uart_config *config;
923         tcflag_t cflag, iflag;
924         int baud;
925         int status;
926         int port_number = port->port_number;
927         unsigned int mcr;
928         u16 wbaudrate;
929         u16 wflags = 0;
930 
931         cflag = tty->termios.c_cflag;
932         iflag = tty->termios.c_iflag;
933 
934         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
935         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
936                 old_termios->c_cflag, old_termios->c_iflag);
937 
938         config = kmalloc(sizeof(*config), GFP_KERNEL);
939         if (!config)
940                 return;
941 
942         /* these flags must be set */
943         wflags |= TI_UART_ENABLE_MS_INTS;
944         wflags |= TI_UART_ENABLE_AUTO_START_DMA;
945         config->bUartMode = tport->tp_uart_mode;
946 
947         switch (C_CSIZE(tty)) {
948         case CS5:
949                     config->bDataBits = TI_UART_5_DATA_BITS;
950                     break;
951         case CS6:
952                     config->bDataBits = TI_UART_6_DATA_BITS;
953                     break;
954         case CS7:
955                     config->bDataBits = TI_UART_7_DATA_BITS;
956                     break;
957         default:
958         case CS8:
959                     config->bDataBits = TI_UART_8_DATA_BITS;
960                     break;
961         }
962 
963         /* CMSPAR isn't supported by this driver */
964         tty->termios.c_cflag &= ~CMSPAR;
965 
966         if (C_PARENB(tty)) {
967                 if (C_PARODD(tty)) {
968                         wflags |= TI_UART_ENABLE_PARITY_CHECKING;
969                         config->bParity = TI_UART_ODD_PARITY;
970                 } else {
971                         wflags |= TI_UART_ENABLE_PARITY_CHECKING;
972                         config->bParity = TI_UART_EVEN_PARITY;
973                 }
974         } else {
975                 wflags &= ~TI_UART_ENABLE_PARITY_CHECKING;
976                 config->bParity = TI_UART_NO_PARITY;
977         }
978 
979         if (C_CSTOPB(tty))
980                 config->bStopBits = TI_UART_2_STOP_BITS;
981         else
982                 config->bStopBits = TI_UART_1_STOP_BITS;
983 
984         if (C_CRTSCTS(tty)) {
985                 /* RTS flow control must be off to drop RTS for baud rate B0 */
986                 if ((C_BAUD(tty)) != B0)
987                         wflags |= TI_UART_ENABLE_RTS_IN;
988                 wflags |= TI_UART_ENABLE_CTS_OUT;
989         } else {
990                 ti_restart_read(tport, tty);
991         }
992 
993         if (I_IXOFF(tty) || I_IXON(tty)) {
994                 config->cXon  = START_CHAR(tty);
995                 config->cXoff = STOP_CHAR(tty);
996 
997                 if (I_IXOFF(tty))
998                         wflags |= TI_UART_ENABLE_X_IN;
999                 else
1000                         ti_restart_read(tport, tty);
1001 
1002                 if (I_IXON(tty))
1003                         wflags |= TI_UART_ENABLE_X_OUT;
1004         }
1005 
1006         baud = tty_get_baud_rate(tty);
1007         if (!baud)
1008                 baud = 9600;
1009         if (tport->tp_tdev->td_is_3410)
1010                 wbaudrate = (923077 + baud/2) / baud;
1011         else
1012                 wbaudrate = (461538 + baud/2) / baud;
1013 
1014         /* FIXME: Should calculate resulting baud here and report it back */
1015         if ((C_BAUD(tty)) != B0)
1016                 tty_encode_baud_rate(tty, baud, baud);
1017 
1018         dev_dbg(&port->dev,
1019                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
1020                 __func__, baud, wbaudrate, wflags,
1021                 config->bDataBits, config->bParity, config->bStopBits,
1022                 config->cXon, config->cXoff, config->bUartMode);
1023 
1024         config->wBaudRate = cpu_to_be16(wbaudrate);
1025         config->wFlags = cpu_to_be16(wflags);
1026 
1027         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1028                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1029                 sizeof(*config));
1030         if (status)
1031                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
1032                                         __func__, port_number, status);
1033 
1034         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1035         mcr = tport->tp_shadow_mcr;
1036         /* if baud rate is B0, clear RTS and DTR */
1037         if (C_BAUD(tty) == B0)
1038                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1039         status = ti_set_mcr(tport, mcr);
1040         if (status)
1041                 dev_err(&port->dev,
1042                         "%s - cannot set modem control on port %d, %d\n",
1043                                                 __func__, port_number, status);
1044 
1045         kfree(config);
1046 }
1047 
1048 
1049 static int ti_tiocmget(struct tty_struct *tty)
1050 {
1051         struct usb_serial_port *port = tty->driver_data;
1052         struct ti_port *tport = usb_get_serial_port_data(port);
1053         unsigned int result;
1054         unsigned int msr;
1055         unsigned int mcr;
1056         unsigned long flags;
1057 
1058         spin_lock_irqsave(&tport->tp_lock, flags);
1059         msr = tport->tp_msr;
1060         mcr = tport->tp_shadow_mcr;
1061         spin_unlock_irqrestore(&tport->tp_lock, flags);
1062 
1063         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1064                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1065                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1066                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1067                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1068                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1069                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1070 
1071         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1072 
1073         return result;
1074 }
1075 
1076 
1077 static int ti_tiocmset(struct tty_struct *tty,
1078                                 unsigned int set, unsigned int clear)
1079 {
1080         struct usb_serial_port *port = tty->driver_data;
1081         struct ti_port *tport = usb_get_serial_port_data(port);
1082         unsigned int mcr;
1083         unsigned long flags;
1084 
1085         spin_lock_irqsave(&tport->tp_lock, flags);
1086         mcr = tport->tp_shadow_mcr;
1087 
1088         if (set & TIOCM_RTS)
1089                 mcr |= TI_MCR_RTS;
1090         if (set & TIOCM_DTR)
1091                 mcr |= TI_MCR_DTR;
1092         if (set & TIOCM_LOOP)
1093                 mcr |= TI_MCR_LOOP;
1094 
1095         if (clear & TIOCM_RTS)
1096                 mcr &= ~TI_MCR_RTS;
1097         if (clear & TIOCM_DTR)
1098                 mcr &= ~TI_MCR_DTR;
1099         if (clear & TIOCM_LOOP)
1100                 mcr &= ~TI_MCR_LOOP;
1101         spin_unlock_irqrestore(&tport->tp_lock, flags);
1102 
1103         return ti_set_mcr(tport, mcr);
1104 }
1105 
1106 
1107 static void ti_break(struct tty_struct *tty, int break_state)
1108 {
1109         struct usb_serial_port *port = tty->driver_data;
1110         struct ti_port *tport = usb_get_serial_port_data(port);
1111         int status;
1112 
1113         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
1114 
1115         status = ti_write_byte(port, tport->tp_tdev,
1116                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1117                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1118 
1119         if (status)
1120                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
1121 }
1122 
1123 static int ti_get_port_from_code(unsigned char code)
1124 {
1125         return (code >> 4) - 3;
1126 }
1127 
1128 static int ti_get_func_from_code(unsigned char code)
1129 {
1130         return code & 0x0f;
1131 }
1132 
1133 static void ti_interrupt_callback(struct urb *urb)
1134 {
1135         struct ti_device *tdev = urb->context;
1136         struct usb_serial_port *port;
1137         struct usb_serial *serial = tdev->td_serial;
1138         struct ti_port *tport;
1139         struct device *dev = &urb->dev->dev;
1140         unsigned char *data = urb->transfer_buffer;
1141         int length = urb->actual_length;
1142         int port_number;
1143         int function;
1144         int status = urb->status;
1145         int retval;
1146         u8 msr;
1147 
1148         switch (status) {
1149         case 0:
1150                 break;
1151         case -ECONNRESET:
1152         case -ENOENT:
1153         case -ESHUTDOWN:
1154                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1155                 return;
1156         default:
1157                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1158                 goto exit;
1159         }
1160 
1161         if (length != 2) {
1162                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1163                 goto exit;
1164         }
1165 
1166         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1167                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1168                 goto exit;
1169         }
1170 
1171         port_number = ti_get_port_from_code(data[0]);
1172         function = ti_get_func_from_code(data[0]);
1173 
1174         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1175                 __func__, port_number, function, data[1]);
1176 
1177         if (port_number >= serial->num_ports) {
1178                 dev_err(dev, "%s - bad port number, %d\n",
1179                                                 __func__, port_number);
1180                 goto exit;
1181         }
1182 
1183         port = serial->port[port_number];
1184 
1185         tport = usb_get_serial_port_data(port);
1186         if (!tport)
1187                 goto exit;
1188 
1189         switch (function) {
1190         case TI_CODE_DATA_ERROR:
1191                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1192                         __func__, port_number, data[1]);
1193                 break;
1194 
1195         case TI_CODE_MODEM_STATUS:
1196                 msr = data[1];
1197                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1198                 ti_handle_new_msr(tport, msr);
1199                 break;
1200 
1201         default:
1202                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1203                                                         __func__, data[1]);
1204                 break;
1205         }
1206 
1207 exit:
1208         retval = usb_submit_urb(urb, GFP_ATOMIC);
1209         if (retval)
1210                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1211                         __func__, retval);
1212 }
1213 
1214 
1215 static void ti_bulk_in_callback(struct urb *urb)
1216 {
1217         struct ti_port *tport = urb->context;
1218         struct usb_serial_port *port = tport->tp_port;
1219         struct device *dev = &urb->dev->dev;
1220         int status = urb->status;
1221         int retval = 0;
1222 
1223         switch (status) {
1224         case 0:
1225                 break;
1226         case -ECONNRESET:
1227         case -ENOENT:
1228         case -ESHUTDOWN:
1229                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1230                 return;
1231         default:
1232                 dev_err(dev, "%s - nonzero urb status, %d\n",
1233                         __func__, status);
1234         }
1235 
1236         if (status == -EPIPE)
1237                 goto exit;
1238 
1239         if (status) {
1240                 dev_err(dev, "%s - stopping read!\n", __func__);
1241                 return;
1242         }
1243 
1244         if (urb->actual_length) {
1245                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1246                                       urb->transfer_buffer);
1247 
1248                 if (!tport->tp_is_open)
1249                         dev_dbg(dev, "%s - port closed, dropping data\n",
1250                                 __func__);
1251                 else
1252                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1253                 spin_lock(&tport->tp_lock);
1254                 port->icount.rx += urb->actual_length;
1255                 spin_unlock(&tport->tp_lock);
1256         }
1257 
1258 exit:
1259         /* continue to read unless stopping */
1260         spin_lock(&tport->tp_lock);
1261         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1262                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1263         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1264                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1265 
1266         spin_unlock(&tport->tp_lock);
1267         if (retval)
1268                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1269                         __func__, retval);
1270 }
1271 
1272 
1273 static void ti_bulk_out_callback(struct urb *urb)
1274 {
1275         struct ti_port *tport = urb->context;
1276         struct usb_serial_port *port = tport->tp_port;
1277         int status = urb->status;
1278 
1279         tport->tp_write_urb_in_use = 0;
1280 
1281         switch (status) {
1282         case 0:
1283                 break;
1284         case -ECONNRESET:
1285         case -ENOENT:
1286         case -ESHUTDOWN:
1287                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1288                 return;
1289         default:
1290                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1291                         __func__, status);
1292         }
1293 
1294         /* send any buffered data */
1295         ti_send(tport);
1296 }
1297 
1298 
1299 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1300                 int length)
1301 {
1302         int cnt;
1303 
1304         do {
1305                 cnt = tty_insert_flip_string(&port->port, data, length);
1306                 if (cnt < length) {
1307                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1308                                                 __func__, length - cnt);
1309                         if (cnt == 0)
1310                                 break;
1311                 }
1312                 tty_flip_buffer_push(&port->port);
1313                 data += cnt;
1314                 length -= cnt;
1315         } while (length > 0);
1316 }
1317 
1318 
1319 static void ti_send(struct ti_port *tport)
1320 {
1321         int count, result;
1322         struct usb_serial_port *port = tport->tp_port;
1323         unsigned long flags;
1324 
1325         spin_lock_irqsave(&tport->tp_lock, flags);
1326 
1327         if (tport->tp_write_urb_in_use)
1328                 goto unlock;
1329 
1330         count = kfifo_out(&port->write_fifo,
1331                                 port->write_urb->transfer_buffer,
1332                                 port->bulk_out_size);
1333 
1334         if (count == 0)
1335                 goto unlock;
1336 
1337         tport->tp_write_urb_in_use = 1;
1338 
1339         spin_unlock_irqrestore(&tport->tp_lock, flags);
1340 
1341         usb_serial_debug_data(&port->dev, __func__, count,
1342                               port->write_urb->transfer_buffer);
1343 
1344         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1345                            usb_sndbulkpipe(port->serial->dev,
1346                                             port->bulk_out_endpointAddress),
1347                            port->write_urb->transfer_buffer, count,
1348                            ti_bulk_out_callback, tport);
1349 
1350         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1351         if (result) {
1352                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1353                                                         __func__, result);
1354                 tport->tp_write_urb_in_use = 0;
1355                 /* TODO: reschedule ti_send */
1356         } else {
1357                 spin_lock_irqsave(&tport->tp_lock, flags);
1358                 port->icount.tx += count;
1359                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1360         }
1361 
1362         /* more room in the buffer for new writes, wakeup */
1363         tty_port_tty_wakeup(&port->port);
1364 
1365         return;
1366 unlock:
1367         spin_unlock_irqrestore(&tport->tp_lock, flags);
1368         return;
1369 }
1370 
1371 
1372 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1373 {
1374         unsigned long flags;
1375         int status;
1376 
1377         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1378                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1379                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1380 
1381         spin_lock_irqsave(&tport->tp_lock, flags);
1382         if (!status)
1383                 tport->tp_shadow_mcr = mcr;
1384         spin_unlock_irqrestore(&tport->tp_lock, flags);
1385 
1386         return status;
1387 }
1388 
1389 
1390 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1391 {
1392         int size, status;
1393         struct ti_device *tdev = tport->tp_tdev;
1394         struct usb_serial_port *port = tport->tp_port;
1395         int port_number = port->port_number;
1396         struct ti_port_status *data;
1397 
1398         size = sizeof(struct ti_port_status);
1399         data = kmalloc(size, GFP_KERNEL);
1400         if (!data)
1401                 return -ENOMEM;
1402 
1403         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1404                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1405         if (status) {
1406                 dev_err(&port->dev,
1407                         "%s - get port status command failed, %d\n",
1408                                                         __func__, status);
1409                 goto free_data;
1410         }
1411 
1412         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1413 
1414         *lsr = data->bLSR;
1415 
1416 free_data:
1417         kfree(data);
1418         return status;
1419 }
1420 
1421 
1422 static int ti_get_serial_info(struct ti_port *tport,
1423         struct serial_struct __user *ret_arg)
1424 {
1425         struct usb_serial_port *port = tport->tp_port;
1426         struct serial_struct ret_serial;
1427         unsigned cwait;
1428 
1429         if (!ret_arg)
1430                 return -EFAULT;
1431 
1432         cwait = port->port.closing_wait;
1433         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1434                 cwait = jiffies_to_msecs(cwait) / 10;
1435 
1436         memset(&ret_serial, 0, sizeof(ret_serial));
1437 
1438         ret_serial.type = PORT_16550A;
1439         ret_serial.line = port->minor;
1440         ret_serial.port = port->port_number;
1441         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1442         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1443         ret_serial.closing_wait = cwait;
1444 
1445         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1446                 return -EFAULT;
1447 
1448         return 0;
1449 }
1450 
1451 
1452 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1453         struct serial_struct __user *new_arg)
1454 {
1455         struct serial_struct new_serial;
1456         unsigned cwait;
1457 
1458         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1459                 return -EFAULT;
1460 
1461         cwait = new_serial.closing_wait;
1462         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1463                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1464 
1465         tport->tp_port->port.closing_wait = cwait;
1466 
1467         return 0;
1468 }
1469 
1470 
1471 static void ti_handle_new_msr(struct ti_port *tport, u8 msr)
1472 {
1473         struct async_icount *icount;
1474         struct tty_struct *tty;
1475         unsigned long flags;
1476 
1477         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1478 
1479         if (msr & TI_MSR_DELTA_MASK) {
1480                 spin_lock_irqsave(&tport->tp_lock, flags);
1481                 icount = &tport->tp_port->icount;
1482                 if (msr & TI_MSR_DELTA_CTS)
1483                         icount->cts++;
1484                 if (msr & TI_MSR_DELTA_DSR)
1485                         icount->dsr++;
1486                 if (msr & TI_MSR_DELTA_CD)
1487                         icount->dcd++;
1488                 if (msr & TI_MSR_DELTA_RI)
1489                         icount->rng++;
1490                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1491                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1492         }
1493 
1494         tport->tp_msr = msr & TI_MSR_MASK;
1495 
1496         /* handle CTS flow control */
1497         tty = tty_port_tty_get(&tport->tp_port->port);
1498         if (tty && C_CRTSCTS(tty)) {
1499                 if (msr & TI_MSR_CTS)
1500                         tty_wakeup(tty);
1501         }
1502         tty_kref_put(tty);
1503 }
1504 
1505 
1506 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1507 {
1508         unsigned long flags;
1509 
1510         spin_lock_irqsave(&tport->tp_lock, flags);
1511 
1512         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1513                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1514 
1515         spin_unlock_irqrestore(&tport->tp_lock, flags);
1516 }
1517 
1518 
1519 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1520 {
1521         struct urb *urb;
1522         int status = 0;
1523         unsigned long flags;
1524 
1525         spin_lock_irqsave(&tport->tp_lock, flags);
1526 
1527         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1528                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1529                 urb = tport->tp_port->read_urb;
1530                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1531                 urb->context = tport;
1532                 status = usb_submit_urb(urb, GFP_KERNEL);
1533         } else  {
1534                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1535                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1536         }
1537 
1538         return status;
1539 }
1540 
1541 
1542 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1543         __u16 moduleid, __u16 value, __u8 *data, int size)
1544 {
1545         int status;
1546 
1547         status = usb_control_msg(tdev->td_serial->dev,
1548                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1549                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1550                 value, moduleid, data, size, 1000);
1551 
1552         if (status == size)
1553                 status = 0;
1554 
1555         if (status > 0)
1556                 status = -ECOMM;
1557 
1558         return status;
1559 }
1560 
1561 
1562 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1563         __u16 moduleid, __u16 value, __u8 *data, int size)
1564 {
1565         int status;
1566 
1567         status = usb_control_msg(tdev->td_serial->dev,
1568                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1569                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1570                 value, moduleid, data, size, 1000);
1571 
1572         if (status == size)
1573                 status = 0;
1574 
1575         if (status > 0)
1576                 status = -ECOMM;
1577 
1578         return status;
1579 }
1580 
1581 
1582 static int ti_write_byte(struct usb_serial_port *port,
1583                          struct ti_device *tdev, unsigned long addr,
1584                          u8 mask, u8 byte)
1585 {
1586         int status;
1587         unsigned int size;
1588         struct ti_write_data_bytes *data;
1589 
1590         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1591                 addr, mask, byte);
1592 
1593         size = sizeof(struct ti_write_data_bytes) + 2;
1594         data = kmalloc(size, GFP_KERNEL);
1595         if (!data)
1596                 return -ENOMEM;
1597 
1598         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1599         data->bDataType = TI_RW_DATA_BYTE;
1600         data->bDataCounter = 1;
1601         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1602         data->wBaseAddrLo = cpu_to_be16(addr);
1603         data->bData[0] = mask;
1604         data->bData[1] = byte;
1605 
1606         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1607                 (__u8 *)data, size);
1608 
1609         if (status < 0)
1610                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1611 
1612         kfree(data);
1613 
1614         return status;
1615 }
1616 
1617 static int ti_do_download(struct usb_device *dev, int pipe,
1618                                                 u8 *buffer, int size)
1619 {
1620         int pos;
1621         u8 cs = 0;
1622         int done;
1623         struct ti_firmware_header *header;
1624         int status = 0;
1625         int len;
1626 
1627         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1628                 cs = (u8)(cs + buffer[pos]);
1629 
1630         header = (struct ti_firmware_header *)buffer;
1631         header->wLength = cpu_to_le16(size - sizeof(*header));
1632         header->bCheckSum = cs;
1633 
1634         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1635         for (pos = 0; pos < size; pos += done) {
1636                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1637                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1638                                                                 &done, 1000);
1639                 if (status)
1640                         break;
1641         }
1642         return status;
1643 }
1644 
1645 static int ti_download_firmware(struct ti_device *tdev)
1646 {
1647         int status;
1648         int buffer_size;
1649         u8 *buffer;
1650         struct usb_device *dev = tdev->td_serial->dev;
1651         unsigned int pipe = usb_sndbulkpipe(dev,
1652                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1653         const struct firmware *fw_p;
1654         char buf[32];
1655 
1656         if (le16_to_cpu(dev->descriptor.idVendor) == MXU1_VENDOR_ID) {
1657                 snprintf(buf,
1658                         sizeof(buf),
1659                         "moxa/moxa-%04x.fw",
1660                         le16_to_cpu(dev->descriptor.idProduct));
1661 
1662                 status = request_firmware(&fw_p, buf, &dev->dev);
1663                 goto check_firmware;
1664         }
1665 
1666         /* try ID specific firmware first, then try generic firmware */
1667         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1668                         le16_to_cpu(dev->descriptor.idVendor),
1669                         le16_to_cpu(dev->descriptor.idProduct));
1670         status = request_firmware(&fw_p, buf, &dev->dev);
1671 
1672         if (status != 0) {
1673                 buf[0] = '\0';
1674                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1675                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1676                         case MTS_CDMA_PRODUCT_ID:
1677                                 strcpy(buf, "mts_cdma.fw");
1678                                 break;
1679                         case MTS_GSM_PRODUCT_ID:
1680                                 strcpy(buf, "mts_gsm.fw");
1681                                 break;
1682                         case MTS_EDGE_PRODUCT_ID:
1683                                 strcpy(buf, "mts_edge.fw");
1684                                 break;
1685                         case MTS_MT9234MU_PRODUCT_ID:
1686                                 strcpy(buf, "mts_mt9234mu.fw");
1687                                 break;
1688                         case MTS_MT9234ZBA_PRODUCT_ID:
1689                                 strcpy(buf, "mts_mt9234zba.fw");
1690                                 break;
1691                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1692                                 strcpy(buf, "mts_mt9234zba.fw");
1693                                 break;                  }
1694                 }
1695                 if (buf[0] == '\0') {
1696                         if (tdev->td_is_3410)
1697                                 strcpy(buf, "ti_3410.fw");
1698                         else
1699                                 strcpy(buf, "ti_5052.fw");
1700                 }
1701                 status = request_firmware(&fw_p, buf, &dev->dev);
1702         }
1703 
1704 check_firmware:
1705         if (status) {
1706                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1707                 return -ENOENT;
1708         }
1709         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1710                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1711                 release_firmware(fw_p);
1712                 return -ENOENT;
1713         }
1714 
1715         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1716         buffer = kmalloc(buffer_size, GFP_KERNEL);
1717         if (buffer) {
1718                 memcpy(buffer, fw_p->data, fw_p->size);
1719                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1720                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1721                 kfree(buffer);
1722         } else {
1723                 status = -ENOMEM;
1724         }
1725         release_firmware(fw_p);
1726         if (status) {
1727                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1728                                                         __func__, status);
1729                 return status;
1730         }
1731 
1732         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1733 
1734         return 0;
1735 }
1736 

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