Version:  2.0.40 2.2.26 2.4.37 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 4.10

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         if (serial->num_bulk_in < serial->num_ports ||
583                         serial->num_bulk_out < serial->num_ports) {
584                 dev_err(&serial->interface->dev, "missing endpoints\n");
585                 status = -ENODEV;
586                 goto free_tdev;
587         }
588 
589         return 0;
590 
591 free_tdev:
592         kfree(tdev);
593         usb_set_serial_data(serial, NULL);
594         return status;
595 }
596 
597 
598 static void ti_release(struct usb_serial *serial)
599 {
600         struct ti_device *tdev = usb_get_serial_data(serial);
601 
602         kfree(tdev);
603 }
604 
605 static int ti_port_probe(struct usb_serial_port *port)
606 {
607         struct ti_port *tport;
608 
609         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
610         if (!tport)
611                 return -ENOMEM;
612 
613         spin_lock_init(&tport->tp_lock);
614         if (port == port->serial->port[0])
615                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
616         else
617                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
618         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
619         tport->tp_port = port;
620         tport->tp_tdev = usb_get_serial_data(port->serial);
621 
622         if (tport->tp_tdev->td_rs485_only)
623                 tport->tp_uart_mode = TI_UART_485_RECEIVER_DISABLED;
624         else
625                 tport->tp_uart_mode = TI_UART_232;
626 
627         usb_set_serial_port_data(port, tport);
628 
629         port->port.drain_delay = 3;
630 
631         return 0;
632 }
633 
634 static int ti_port_remove(struct usb_serial_port *port)
635 {
636         struct ti_port *tport;
637 
638         tport = usb_get_serial_port_data(port);
639         kfree(tport);
640 
641         return 0;
642 }
643 
644 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
645 {
646         struct ti_port *tport = usb_get_serial_port_data(port);
647         struct ti_device *tdev;
648         struct usb_device *dev;
649         struct urb *urb;
650         int port_number;
651         int status;
652         u16 open_settings;
653 
654         open_settings = (TI_PIPE_MODE_CONTINUOUS |
655                          TI_PIPE_TIMEOUT_ENABLE |
656                          (TI_TRANSFER_TIMEOUT << 2));
657 
658         dev = port->serial->dev;
659         tdev = tport->tp_tdev;
660 
661         /* only one open on any port on a device at a time */
662         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
663                 return -ERESTARTSYS;
664 
665         port_number = port->port_number;
666 
667         tport->tp_msr = 0;
668         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
669 
670         /* start interrupt urb the first time a port is opened on this device */
671         if (tdev->td_open_port_count == 0) {
672                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
673                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
674                 if (!urb) {
675                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
676                         status = -EINVAL;
677                         goto release_lock;
678                 }
679                 urb->context = tdev;
680                 status = usb_submit_urb(urb, GFP_KERNEL);
681                 if (status) {
682                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
683                         goto release_lock;
684                 }
685         }
686 
687         if (tty)
688                 ti_set_termios(tty, port, &tty->termios);
689 
690         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
691                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
692         if (status) {
693                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
694                         __func__, status);
695                 goto unlink_int_urb;
696         }
697 
698         status = ti_command_out_sync(tdev, TI_START_PORT,
699                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
700         if (status) {
701                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
702                                                         __func__, status);
703                 goto unlink_int_urb;
704         }
705 
706         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
707                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
708         if (status) {
709                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
710                                                         __func__, status);
711                 goto unlink_int_urb;
712         }
713         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
714                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
715         if (status) {
716                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
717                                                         __func__, status);
718                 goto unlink_int_urb;
719         }
720 
721         /* reset the data toggle on the bulk endpoints to work around bug in
722          * host controllers where things get out of sync some times */
723         usb_clear_halt(dev, port->write_urb->pipe);
724         usb_clear_halt(dev, port->read_urb->pipe);
725 
726         if (tty)
727                 ti_set_termios(tty, port, &tty->termios);
728 
729         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
730                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
731         if (status) {
732                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
733                                                         __func__, status);
734                 goto unlink_int_urb;
735         }
736 
737         status = ti_command_out_sync(tdev, TI_START_PORT,
738                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
739         if (status) {
740                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
741                                                         __func__, status);
742                 goto unlink_int_urb;
743         }
744 
745         /* start read urb */
746         urb = port->read_urb;
747         if (!urb) {
748                 dev_err(&port->dev, "%s - no read urb\n", __func__);
749                 status = -EINVAL;
750                 goto unlink_int_urb;
751         }
752         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
753         urb->context = tport;
754         status = usb_submit_urb(urb, GFP_KERNEL);
755         if (status) {
756                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
757                                                         __func__, status);
758                 goto unlink_int_urb;
759         }
760 
761         tport->tp_is_open = 1;
762         ++tdev->td_open_port_count;
763 
764         goto release_lock;
765 
766 unlink_int_urb:
767         if (tdev->td_open_port_count == 0)
768                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
769 release_lock:
770         mutex_unlock(&tdev->td_open_close_lock);
771         return status;
772 }
773 
774 
775 static void ti_close(struct usb_serial_port *port)
776 {
777         struct ti_device *tdev;
778         struct ti_port *tport;
779         int port_number;
780         int status;
781         int do_unlock;
782         unsigned long flags;
783 
784         tdev = usb_get_serial_data(port->serial);
785         tport = usb_get_serial_port_data(port);
786 
787         tport->tp_is_open = 0;
788 
789         usb_kill_urb(port->read_urb);
790         usb_kill_urb(port->write_urb);
791         tport->tp_write_urb_in_use = 0;
792         spin_lock_irqsave(&tport->tp_lock, flags);
793         kfifo_reset_out(&port->write_fifo);
794         spin_unlock_irqrestore(&tport->tp_lock, flags);
795 
796         port_number = port->port_number;
797 
798         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
799                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
800         if (status)
801                 dev_err(&port->dev,
802                         "%s - cannot send close port command, %d\n"
803                                                         , __func__, status);
804 
805         /* if mutex_lock is interrupted, continue anyway */
806         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
807         --tport->tp_tdev->td_open_port_count;
808         if (tport->tp_tdev->td_open_port_count <= 0) {
809                 /* last port is closed, shut down interrupt urb */
810                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
811                 tport->tp_tdev->td_open_port_count = 0;
812         }
813         if (do_unlock)
814                 mutex_unlock(&tdev->td_open_close_lock);
815 }
816 
817 
818 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
819                         const unsigned char *data, int count)
820 {
821         struct ti_port *tport = usb_get_serial_port_data(port);
822 
823         if (count == 0) {
824                 return 0;
825         }
826 
827         if (!tport->tp_is_open)
828                 return -ENODEV;
829 
830         count = kfifo_in_locked(&port->write_fifo, data, count,
831                                                         &tport->tp_lock);
832         ti_send(tport);
833 
834         return count;
835 }
836 
837 
838 static int ti_write_room(struct tty_struct *tty)
839 {
840         struct usb_serial_port *port = tty->driver_data;
841         struct ti_port *tport = usb_get_serial_port_data(port);
842         int room = 0;
843         unsigned long flags;
844 
845         spin_lock_irqsave(&tport->tp_lock, flags);
846         room = kfifo_avail(&port->write_fifo);
847         spin_unlock_irqrestore(&tport->tp_lock, flags);
848 
849         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
850         return room;
851 }
852 
853 
854 static int ti_chars_in_buffer(struct tty_struct *tty)
855 {
856         struct usb_serial_port *port = tty->driver_data;
857         struct ti_port *tport = usb_get_serial_port_data(port);
858         int chars = 0;
859         unsigned long flags;
860 
861         spin_lock_irqsave(&tport->tp_lock, flags);
862         chars = kfifo_len(&port->write_fifo);
863         spin_unlock_irqrestore(&tport->tp_lock, flags);
864 
865         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
866         return chars;
867 }
868 
869 static bool ti_tx_empty(struct usb_serial_port *port)
870 {
871         struct ti_port *tport = usb_get_serial_port_data(port);
872         int ret;
873         u8 lsr;
874 
875         ret = ti_get_lsr(tport, &lsr);
876         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
877                 return false;
878 
879         return true;
880 }
881 
882 static void ti_throttle(struct tty_struct *tty)
883 {
884         struct usb_serial_port *port = tty->driver_data;
885         struct ti_port *tport = usb_get_serial_port_data(port);
886 
887         if (I_IXOFF(tty) || C_CRTSCTS(tty))
888                 ti_stop_read(tport, tty);
889 
890 }
891 
892 
893 static void ti_unthrottle(struct tty_struct *tty)
894 {
895         struct usb_serial_port *port = tty->driver_data;
896         struct ti_port *tport = usb_get_serial_port_data(port);
897         int status;
898 
899         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
900                 status = ti_restart_read(tport, tty);
901                 if (status)
902                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
903                                                         __func__, status);
904         }
905 }
906 
907 static int ti_ioctl(struct tty_struct *tty,
908         unsigned int cmd, unsigned long arg)
909 {
910         struct usb_serial_port *port = tty->driver_data;
911         struct ti_port *tport = usb_get_serial_port_data(port);
912 
913         switch (cmd) {
914         case TIOCGSERIAL:
915                 return ti_get_serial_info(tport,
916                                 (struct serial_struct __user *)arg);
917         case TIOCSSERIAL:
918                 return ti_set_serial_info(tty, tport,
919                                 (struct serial_struct __user *)arg);
920         }
921         return -ENOIOCTLCMD;
922 }
923 
924 
925 static void ti_set_termios(struct tty_struct *tty,
926                 struct usb_serial_port *port, struct ktermios *old_termios)
927 {
928         struct ti_port *tport = usb_get_serial_port_data(port);
929         struct ti_uart_config *config;
930         tcflag_t cflag, iflag;
931         int baud;
932         int status;
933         int port_number = port->port_number;
934         unsigned int mcr;
935         u16 wbaudrate;
936         u16 wflags = 0;
937 
938         cflag = tty->termios.c_cflag;
939         iflag = tty->termios.c_iflag;
940 
941         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
942         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
943                 old_termios->c_cflag, old_termios->c_iflag);
944 
945         config = kmalloc(sizeof(*config), GFP_KERNEL);
946         if (!config)
947                 return;
948 
949         /* these flags must be set */
950         wflags |= TI_UART_ENABLE_MS_INTS;
951         wflags |= TI_UART_ENABLE_AUTO_START_DMA;
952         config->bUartMode = tport->tp_uart_mode;
953 
954         switch (C_CSIZE(tty)) {
955         case CS5:
956                     config->bDataBits = TI_UART_5_DATA_BITS;
957                     break;
958         case CS6:
959                     config->bDataBits = TI_UART_6_DATA_BITS;
960                     break;
961         case CS7:
962                     config->bDataBits = TI_UART_7_DATA_BITS;
963                     break;
964         default:
965         case CS8:
966                     config->bDataBits = TI_UART_8_DATA_BITS;
967                     break;
968         }
969 
970         /* CMSPAR isn't supported by this driver */
971         tty->termios.c_cflag &= ~CMSPAR;
972 
973         if (C_PARENB(tty)) {
974                 if (C_PARODD(tty)) {
975                         wflags |= TI_UART_ENABLE_PARITY_CHECKING;
976                         config->bParity = TI_UART_ODD_PARITY;
977                 } else {
978                         wflags |= TI_UART_ENABLE_PARITY_CHECKING;
979                         config->bParity = TI_UART_EVEN_PARITY;
980                 }
981         } else {
982                 wflags &= ~TI_UART_ENABLE_PARITY_CHECKING;
983                 config->bParity = TI_UART_NO_PARITY;
984         }
985 
986         if (C_CSTOPB(tty))
987                 config->bStopBits = TI_UART_2_STOP_BITS;
988         else
989                 config->bStopBits = TI_UART_1_STOP_BITS;
990 
991         if (C_CRTSCTS(tty)) {
992                 /* RTS flow control must be off to drop RTS for baud rate B0 */
993                 if ((C_BAUD(tty)) != B0)
994                         wflags |= TI_UART_ENABLE_RTS_IN;
995                 wflags |= TI_UART_ENABLE_CTS_OUT;
996         } else {
997                 ti_restart_read(tport, tty);
998         }
999 
1000         if (I_IXOFF(tty) || I_IXON(tty)) {
1001                 config->cXon  = START_CHAR(tty);
1002                 config->cXoff = STOP_CHAR(tty);
1003 
1004                 if (I_IXOFF(tty))
1005                         wflags |= TI_UART_ENABLE_X_IN;
1006                 else
1007                         ti_restart_read(tport, tty);
1008 
1009                 if (I_IXON(tty))
1010                         wflags |= TI_UART_ENABLE_X_OUT;
1011         }
1012 
1013         baud = tty_get_baud_rate(tty);
1014         if (!baud)
1015                 baud = 9600;
1016         if (tport->tp_tdev->td_is_3410)
1017                 wbaudrate = (923077 + baud/2) / baud;
1018         else
1019                 wbaudrate = (461538 + baud/2) / baud;
1020 
1021         /* FIXME: Should calculate resulting baud here and report it back */
1022         if ((C_BAUD(tty)) != B0)
1023                 tty_encode_baud_rate(tty, baud, baud);
1024 
1025         dev_dbg(&port->dev,
1026                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
1027                 __func__, baud, wbaudrate, wflags,
1028                 config->bDataBits, config->bParity, config->bStopBits,
1029                 config->cXon, config->cXoff, config->bUartMode);
1030 
1031         config->wBaudRate = cpu_to_be16(wbaudrate);
1032         config->wFlags = cpu_to_be16(wflags);
1033 
1034         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1035                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1036                 sizeof(*config));
1037         if (status)
1038                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
1039                                         __func__, port_number, status);
1040 
1041         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1042         mcr = tport->tp_shadow_mcr;
1043         /* if baud rate is B0, clear RTS and DTR */
1044         if (C_BAUD(tty) == B0)
1045                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1046         status = ti_set_mcr(tport, mcr);
1047         if (status)
1048                 dev_err(&port->dev,
1049                         "%s - cannot set modem control on port %d, %d\n",
1050                                                 __func__, port_number, status);
1051 
1052         kfree(config);
1053 }
1054 
1055 
1056 static int ti_tiocmget(struct tty_struct *tty)
1057 {
1058         struct usb_serial_port *port = tty->driver_data;
1059         struct ti_port *tport = usb_get_serial_port_data(port);
1060         unsigned int result;
1061         unsigned int msr;
1062         unsigned int mcr;
1063         unsigned long flags;
1064 
1065         spin_lock_irqsave(&tport->tp_lock, flags);
1066         msr = tport->tp_msr;
1067         mcr = tport->tp_shadow_mcr;
1068         spin_unlock_irqrestore(&tport->tp_lock, flags);
1069 
1070         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1071                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1072                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1073                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1074                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1075                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1076                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1077 
1078         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1079 
1080         return result;
1081 }
1082 
1083 
1084 static int ti_tiocmset(struct tty_struct *tty,
1085                                 unsigned int set, unsigned int clear)
1086 {
1087         struct usb_serial_port *port = tty->driver_data;
1088         struct ti_port *tport = usb_get_serial_port_data(port);
1089         unsigned int mcr;
1090         unsigned long flags;
1091 
1092         spin_lock_irqsave(&tport->tp_lock, flags);
1093         mcr = tport->tp_shadow_mcr;
1094 
1095         if (set & TIOCM_RTS)
1096                 mcr |= TI_MCR_RTS;
1097         if (set & TIOCM_DTR)
1098                 mcr |= TI_MCR_DTR;
1099         if (set & TIOCM_LOOP)
1100                 mcr |= TI_MCR_LOOP;
1101 
1102         if (clear & TIOCM_RTS)
1103                 mcr &= ~TI_MCR_RTS;
1104         if (clear & TIOCM_DTR)
1105                 mcr &= ~TI_MCR_DTR;
1106         if (clear & TIOCM_LOOP)
1107                 mcr &= ~TI_MCR_LOOP;
1108         spin_unlock_irqrestore(&tport->tp_lock, flags);
1109 
1110         return ti_set_mcr(tport, mcr);
1111 }
1112 
1113 
1114 static void ti_break(struct tty_struct *tty, int break_state)
1115 {
1116         struct usb_serial_port *port = tty->driver_data;
1117         struct ti_port *tport = usb_get_serial_port_data(port);
1118         int status;
1119 
1120         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
1121 
1122         status = ti_write_byte(port, tport->tp_tdev,
1123                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1124                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1125 
1126         if (status)
1127                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
1128 }
1129 
1130 static int ti_get_port_from_code(unsigned char code)
1131 {
1132         return (code >> 4) - 3;
1133 }
1134 
1135 static int ti_get_func_from_code(unsigned char code)
1136 {
1137         return code & 0x0f;
1138 }
1139 
1140 static void ti_interrupt_callback(struct urb *urb)
1141 {
1142         struct ti_device *tdev = urb->context;
1143         struct usb_serial_port *port;
1144         struct usb_serial *serial = tdev->td_serial;
1145         struct ti_port *tport;
1146         struct device *dev = &urb->dev->dev;
1147         unsigned char *data = urb->transfer_buffer;
1148         int length = urb->actual_length;
1149         int port_number;
1150         int function;
1151         int status = urb->status;
1152         int retval;
1153         u8 msr;
1154 
1155         switch (status) {
1156         case 0:
1157                 break;
1158         case -ECONNRESET:
1159         case -ENOENT:
1160         case -ESHUTDOWN:
1161                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1162                 return;
1163         default:
1164                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1165                 goto exit;
1166         }
1167 
1168         if (length != 2) {
1169                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1170                 goto exit;
1171         }
1172 
1173         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1174                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1175                 goto exit;
1176         }
1177 
1178         port_number = ti_get_port_from_code(data[0]);
1179         function = ti_get_func_from_code(data[0]);
1180 
1181         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1182                 __func__, port_number, function, data[1]);
1183 
1184         if (port_number >= serial->num_ports) {
1185                 dev_err(dev, "%s - bad port number, %d\n",
1186                                                 __func__, port_number);
1187                 goto exit;
1188         }
1189 
1190         port = serial->port[port_number];
1191 
1192         tport = usb_get_serial_port_data(port);
1193         if (!tport)
1194                 goto exit;
1195 
1196         switch (function) {
1197         case TI_CODE_DATA_ERROR:
1198                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1199                         __func__, port_number, data[1]);
1200                 break;
1201 
1202         case TI_CODE_MODEM_STATUS:
1203                 msr = data[1];
1204                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1205                 ti_handle_new_msr(tport, msr);
1206                 break;
1207 
1208         default:
1209                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1210                                                         __func__, data[1]);
1211                 break;
1212         }
1213 
1214 exit:
1215         retval = usb_submit_urb(urb, GFP_ATOMIC);
1216         if (retval)
1217                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1218                         __func__, retval);
1219 }
1220 
1221 
1222 static void ti_bulk_in_callback(struct urb *urb)
1223 {
1224         struct ti_port *tport = urb->context;
1225         struct usb_serial_port *port = tport->tp_port;
1226         struct device *dev = &urb->dev->dev;
1227         int status = urb->status;
1228         int retval = 0;
1229 
1230         switch (status) {
1231         case 0:
1232                 break;
1233         case -ECONNRESET:
1234         case -ENOENT:
1235         case -ESHUTDOWN:
1236                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1237                 return;
1238         default:
1239                 dev_err(dev, "%s - nonzero urb status, %d\n",
1240                         __func__, status);
1241         }
1242 
1243         if (status == -EPIPE)
1244                 goto exit;
1245 
1246         if (status) {
1247                 dev_err(dev, "%s - stopping read!\n", __func__);
1248                 return;
1249         }
1250 
1251         if (urb->actual_length) {
1252                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1253                                       urb->transfer_buffer);
1254 
1255                 if (!tport->tp_is_open)
1256                         dev_dbg(dev, "%s - port closed, dropping data\n",
1257                                 __func__);
1258                 else
1259                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1260                 spin_lock(&tport->tp_lock);
1261                 port->icount.rx += urb->actual_length;
1262                 spin_unlock(&tport->tp_lock);
1263         }
1264 
1265 exit:
1266         /* continue to read unless stopping */
1267         spin_lock(&tport->tp_lock);
1268         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1269                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1270         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1271                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1272 
1273         spin_unlock(&tport->tp_lock);
1274         if (retval)
1275                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1276                         __func__, retval);
1277 }
1278 
1279 
1280 static void ti_bulk_out_callback(struct urb *urb)
1281 {
1282         struct ti_port *tport = urb->context;
1283         struct usb_serial_port *port = tport->tp_port;
1284         int status = urb->status;
1285 
1286         tport->tp_write_urb_in_use = 0;
1287 
1288         switch (status) {
1289         case 0:
1290                 break;
1291         case -ECONNRESET:
1292         case -ENOENT:
1293         case -ESHUTDOWN:
1294                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1295                 return;
1296         default:
1297                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1298                         __func__, status);
1299         }
1300 
1301         /* send any buffered data */
1302         ti_send(tport);
1303 }
1304 
1305 
1306 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1307                 int length)
1308 {
1309         int cnt;
1310 
1311         do {
1312                 cnt = tty_insert_flip_string(&port->port, data, length);
1313                 if (cnt < length) {
1314                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1315                                                 __func__, length - cnt);
1316                         if (cnt == 0)
1317                                 break;
1318                 }
1319                 tty_flip_buffer_push(&port->port);
1320                 data += cnt;
1321                 length -= cnt;
1322         } while (length > 0);
1323 }
1324 
1325 
1326 static void ti_send(struct ti_port *tport)
1327 {
1328         int count, result;
1329         struct usb_serial_port *port = tport->tp_port;
1330         unsigned long flags;
1331 
1332         spin_lock_irqsave(&tport->tp_lock, flags);
1333 
1334         if (tport->tp_write_urb_in_use)
1335                 goto unlock;
1336 
1337         count = kfifo_out(&port->write_fifo,
1338                                 port->write_urb->transfer_buffer,
1339                                 port->bulk_out_size);
1340 
1341         if (count == 0)
1342                 goto unlock;
1343 
1344         tport->tp_write_urb_in_use = 1;
1345 
1346         spin_unlock_irqrestore(&tport->tp_lock, flags);
1347 
1348         usb_serial_debug_data(&port->dev, __func__, count,
1349                               port->write_urb->transfer_buffer);
1350 
1351         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1352                            usb_sndbulkpipe(port->serial->dev,
1353                                             port->bulk_out_endpointAddress),
1354                            port->write_urb->transfer_buffer, count,
1355                            ti_bulk_out_callback, tport);
1356 
1357         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1358         if (result) {
1359                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1360                                                         __func__, result);
1361                 tport->tp_write_urb_in_use = 0;
1362                 /* TODO: reschedule ti_send */
1363         } else {
1364                 spin_lock_irqsave(&tport->tp_lock, flags);
1365                 port->icount.tx += count;
1366                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1367         }
1368 
1369         /* more room in the buffer for new writes, wakeup */
1370         tty_port_tty_wakeup(&port->port);
1371 
1372         return;
1373 unlock:
1374         spin_unlock_irqrestore(&tport->tp_lock, flags);
1375         return;
1376 }
1377 
1378 
1379 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1380 {
1381         unsigned long flags;
1382         int status;
1383 
1384         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1385                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1386                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1387 
1388         spin_lock_irqsave(&tport->tp_lock, flags);
1389         if (!status)
1390                 tport->tp_shadow_mcr = mcr;
1391         spin_unlock_irqrestore(&tport->tp_lock, flags);
1392 
1393         return status;
1394 }
1395 
1396 
1397 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1398 {
1399         int size, status;
1400         struct ti_device *tdev = tport->tp_tdev;
1401         struct usb_serial_port *port = tport->tp_port;
1402         int port_number = port->port_number;
1403         struct ti_port_status *data;
1404 
1405         size = sizeof(struct ti_port_status);
1406         data = kmalloc(size, GFP_KERNEL);
1407         if (!data)
1408                 return -ENOMEM;
1409 
1410         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1411                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1412         if (status) {
1413                 dev_err(&port->dev,
1414                         "%s - get port status command failed, %d\n",
1415                                                         __func__, status);
1416                 goto free_data;
1417         }
1418 
1419         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1420 
1421         *lsr = data->bLSR;
1422 
1423 free_data:
1424         kfree(data);
1425         return status;
1426 }
1427 
1428 
1429 static int ti_get_serial_info(struct ti_port *tport,
1430         struct serial_struct __user *ret_arg)
1431 {
1432         struct usb_serial_port *port = tport->tp_port;
1433         struct serial_struct ret_serial;
1434         unsigned cwait;
1435 
1436         cwait = port->port.closing_wait;
1437         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1438                 cwait = jiffies_to_msecs(cwait) / 10;
1439 
1440         memset(&ret_serial, 0, sizeof(ret_serial));
1441 
1442         ret_serial.type = PORT_16550A;
1443         ret_serial.line = port->minor;
1444         ret_serial.port = port->port_number;
1445         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1446         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1447         ret_serial.closing_wait = cwait;
1448 
1449         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1450                 return -EFAULT;
1451 
1452         return 0;
1453 }
1454 
1455 
1456 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1457         struct serial_struct __user *new_arg)
1458 {
1459         struct serial_struct new_serial;
1460         unsigned cwait;
1461 
1462         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1463                 return -EFAULT;
1464 
1465         cwait = new_serial.closing_wait;
1466         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1467                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1468 
1469         tport->tp_port->port.closing_wait = cwait;
1470 
1471         return 0;
1472 }
1473 
1474 
1475 static void ti_handle_new_msr(struct ti_port *tport, u8 msr)
1476 {
1477         struct async_icount *icount;
1478         struct tty_struct *tty;
1479         unsigned long flags;
1480 
1481         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1482 
1483         if (msr & TI_MSR_DELTA_MASK) {
1484                 spin_lock_irqsave(&tport->tp_lock, flags);
1485                 icount = &tport->tp_port->icount;
1486                 if (msr & TI_MSR_DELTA_CTS)
1487                         icount->cts++;
1488                 if (msr & TI_MSR_DELTA_DSR)
1489                         icount->dsr++;
1490                 if (msr & TI_MSR_DELTA_CD)
1491                         icount->dcd++;
1492                 if (msr & TI_MSR_DELTA_RI)
1493                         icount->rng++;
1494                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1495                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1496         }
1497 
1498         tport->tp_msr = msr & TI_MSR_MASK;
1499 
1500         /* handle CTS flow control */
1501         tty = tty_port_tty_get(&tport->tp_port->port);
1502         if (tty && C_CRTSCTS(tty)) {
1503                 if (msr & TI_MSR_CTS)
1504                         tty_wakeup(tty);
1505         }
1506         tty_kref_put(tty);
1507 }
1508 
1509 
1510 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1511 {
1512         unsigned long flags;
1513 
1514         spin_lock_irqsave(&tport->tp_lock, flags);
1515 
1516         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1517                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1518 
1519         spin_unlock_irqrestore(&tport->tp_lock, flags);
1520 }
1521 
1522 
1523 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1524 {
1525         struct urb *urb;
1526         int status = 0;
1527         unsigned long flags;
1528 
1529         spin_lock_irqsave(&tport->tp_lock, flags);
1530 
1531         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1532                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1533                 urb = tport->tp_port->read_urb;
1534                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1535                 urb->context = tport;
1536                 status = usb_submit_urb(urb, GFP_KERNEL);
1537         } else  {
1538                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1539                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1540         }
1541 
1542         return status;
1543 }
1544 
1545 
1546 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1547         __u16 moduleid, __u16 value, __u8 *data, int size)
1548 {
1549         int status;
1550 
1551         status = usb_control_msg(tdev->td_serial->dev,
1552                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1553                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1554                 value, moduleid, data, size, 1000);
1555 
1556         if (status == size)
1557                 status = 0;
1558 
1559         if (status > 0)
1560                 status = -ECOMM;
1561 
1562         return status;
1563 }
1564 
1565 
1566 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1567         __u16 moduleid, __u16 value, __u8 *data, int size)
1568 {
1569         int status;
1570 
1571         status = usb_control_msg(tdev->td_serial->dev,
1572                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1573                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1574                 value, moduleid, data, size, 1000);
1575 
1576         if (status == size)
1577                 status = 0;
1578 
1579         if (status > 0)
1580                 status = -ECOMM;
1581 
1582         return status;
1583 }
1584 
1585 
1586 static int ti_write_byte(struct usb_serial_port *port,
1587                          struct ti_device *tdev, unsigned long addr,
1588                          u8 mask, u8 byte)
1589 {
1590         int status;
1591         unsigned int size;
1592         struct ti_write_data_bytes *data;
1593 
1594         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1595                 addr, mask, byte);
1596 
1597         size = sizeof(struct ti_write_data_bytes) + 2;
1598         data = kmalloc(size, GFP_KERNEL);
1599         if (!data)
1600                 return -ENOMEM;
1601 
1602         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1603         data->bDataType = TI_RW_DATA_BYTE;
1604         data->bDataCounter = 1;
1605         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1606         data->wBaseAddrLo = cpu_to_be16(addr);
1607         data->bData[0] = mask;
1608         data->bData[1] = byte;
1609 
1610         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1611                 (__u8 *)data, size);
1612 
1613         if (status < 0)
1614                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1615 
1616         kfree(data);
1617 
1618         return status;
1619 }
1620 
1621 static int ti_do_download(struct usb_device *dev, int pipe,
1622                                                 u8 *buffer, int size)
1623 {
1624         int pos;
1625         u8 cs = 0;
1626         int done;
1627         struct ti_firmware_header *header;
1628         int status = 0;
1629         int len;
1630 
1631         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1632                 cs = (u8)(cs + buffer[pos]);
1633 
1634         header = (struct ti_firmware_header *)buffer;
1635         header->wLength = cpu_to_le16(size - sizeof(*header));
1636         header->bCheckSum = cs;
1637 
1638         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1639         for (pos = 0; pos < size; pos += done) {
1640                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1641                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1642                                                                 &done, 1000);
1643                 if (status)
1644                         break;
1645         }
1646         return status;
1647 }
1648 
1649 static int ti_download_firmware(struct ti_device *tdev)
1650 {
1651         int status;
1652         int buffer_size;
1653         u8 *buffer;
1654         struct usb_device *dev = tdev->td_serial->dev;
1655         unsigned int pipe = usb_sndbulkpipe(dev,
1656                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1657         const struct firmware *fw_p;
1658         char buf[32];
1659 
1660         if (le16_to_cpu(dev->descriptor.idVendor) == MXU1_VENDOR_ID) {
1661                 snprintf(buf,
1662                         sizeof(buf),
1663                         "moxa/moxa-%04x.fw",
1664                         le16_to_cpu(dev->descriptor.idProduct));
1665 
1666                 status = request_firmware(&fw_p, buf, &dev->dev);
1667                 goto check_firmware;
1668         }
1669 
1670         /* try ID specific firmware first, then try generic firmware */
1671         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1672                         le16_to_cpu(dev->descriptor.idVendor),
1673                         le16_to_cpu(dev->descriptor.idProduct));
1674         status = request_firmware(&fw_p, buf, &dev->dev);
1675 
1676         if (status != 0) {
1677                 buf[0] = '\0';
1678                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1679                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1680                         case MTS_CDMA_PRODUCT_ID:
1681                                 strcpy(buf, "mts_cdma.fw");
1682                                 break;
1683                         case MTS_GSM_PRODUCT_ID:
1684                                 strcpy(buf, "mts_gsm.fw");
1685                                 break;
1686                         case MTS_EDGE_PRODUCT_ID:
1687                                 strcpy(buf, "mts_edge.fw");
1688                                 break;
1689                         case MTS_MT9234MU_PRODUCT_ID:
1690                                 strcpy(buf, "mts_mt9234mu.fw");
1691                                 break;
1692                         case MTS_MT9234ZBA_PRODUCT_ID:
1693                                 strcpy(buf, "mts_mt9234zba.fw");
1694                                 break;
1695                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1696                                 strcpy(buf, "mts_mt9234zba.fw");
1697                                 break;                  }
1698                 }
1699                 if (buf[0] == '\0') {
1700                         if (tdev->td_is_3410)
1701                                 strcpy(buf, "ti_3410.fw");
1702                         else
1703                                 strcpy(buf, "ti_5052.fw");
1704                 }
1705                 status = request_firmware(&fw_p, buf, &dev->dev);
1706         }
1707 
1708 check_firmware:
1709         if (status) {
1710                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1711                 return -ENOENT;
1712         }
1713         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1714                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1715                 release_firmware(fw_p);
1716                 return -ENOENT;
1717         }
1718 
1719         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1720         buffer = kmalloc(buffer_size, GFP_KERNEL);
1721         if (buffer) {
1722                 memcpy(buffer, fw_p->data, fw_p->size);
1723                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1724                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1725                 kfree(buffer);
1726         } else {
1727                 status = -ENOMEM;
1728         }
1729         release_firmware(fw_p);
1730         if (status) {
1731                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1732                                                         __func__, status);
1733                 return status;
1734         }
1735 
1736         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1737 
1738         return 0;
1739 }
1740 

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