Version:  2.0.40 2.2.26 2.4.37 3.11 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

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         __u16   wBaudRate;
183         __u16   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 /* supported setserial flags */
280 #define TI_SET_SERIAL_FLAGS     0
281 
282 /* read urb states */
283 #define TI_READ_URB_RUNNING     0
284 #define TI_READ_URB_STOPPING    1
285 #define TI_READ_URB_STOPPED     2
286 
287 #define TI_EXTRA_VID_PID_COUNT  5
288 
289 struct ti_port {
290         int                     tp_is_open;
291         __u8                    tp_msr;
292         __u8                    tp_shadow_mcr;
293         __u8                    tp_uart_mode;   /* 232 or 485 modes */
294         unsigned int            tp_uart_base_addr;
295         int                     tp_flags;
296         struct ti_device        *tp_tdev;
297         struct usb_serial_port  *tp_port;
298         spinlock_t              tp_lock;
299         int                     tp_read_urb_state;
300         int                     tp_write_urb_in_use;
301 };
302 
303 struct ti_device {
304         struct mutex            td_open_close_lock;
305         int                     td_open_port_count;
306         struct usb_serial       *td_serial;
307         int                     td_is_3410;
308         bool                    td_rs485_only;
309         int                     td_urb_error;
310 };
311 
312 static int ti_startup(struct usb_serial *serial);
313 static void ti_release(struct usb_serial *serial);
314 static int ti_port_probe(struct usb_serial_port *port);
315 static int ti_port_remove(struct usb_serial_port *port);
316 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
317 static void ti_close(struct usb_serial_port *port);
318 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
319                 const unsigned char *data, int count);
320 static int ti_write_room(struct tty_struct *tty);
321 static int ti_chars_in_buffer(struct tty_struct *tty);
322 static bool ti_tx_empty(struct usb_serial_port *port);
323 static void ti_throttle(struct tty_struct *tty);
324 static void ti_unthrottle(struct tty_struct *tty);
325 static int ti_ioctl(struct tty_struct *tty,
326                 unsigned int cmd, unsigned long arg);
327 static void ti_set_termios(struct tty_struct *tty,
328                 struct usb_serial_port *port, struct ktermios *old_termios);
329 static int ti_tiocmget(struct tty_struct *tty);
330 static int ti_tiocmset(struct tty_struct *tty,
331                 unsigned int set, unsigned int clear);
332 static void ti_break(struct tty_struct *tty, int break_state);
333 static void ti_interrupt_callback(struct urb *urb);
334 static void ti_bulk_in_callback(struct urb *urb);
335 static void ti_bulk_out_callback(struct urb *urb);
336 
337 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
338                 int length);
339 static void ti_send(struct ti_port *tport);
340 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
341 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
342 static int ti_get_serial_info(struct ti_port *tport,
343         struct serial_struct __user *ret_arg);
344 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
345         struct serial_struct __user *new_arg);
346 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
347 
348 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
349 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
350 
351 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
352         __u16 moduleid, __u16 value, __u8 *data, int size);
353 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
354         __u16 moduleid, __u16 value, __u8 *data, int size);
355 
356 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
357                          unsigned long addr, __u8 mask, __u8 byte);
358 
359 static int ti_download_firmware(struct ti_device *tdev);
360 
361 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
362 
363 static const struct usb_device_id ti_id_table_3410[] = {
364         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
365         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
366         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
367         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
368         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
369         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
370         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
371         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
372         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
373         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
374         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
375         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
376         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
377         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
378         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
379         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
380         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
381         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
382         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
383         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
384         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
385         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
386         { }     /* terminator */
387 };
388 
389 static const struct usb_device_id ti_id_table_5052[] = {
390         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
391         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
392         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
393         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
394         { }
395 };
396 
397 static const struct usb_device_id ti_id_table_combined[] = {
398         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
399         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
400         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
401         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
402         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
403         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
404         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
405         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
406         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
407         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
408         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
409         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
410         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
411         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
412         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
413         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
414         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
415         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
416         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
417         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
418         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
419         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
420         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
421         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
422         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
423         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
424         { }     /* terminator */
425 };
426 
427 static struct usb_serial_driver ti_1port_device = {
428         .driver = {
429                 .owner          = THIS_MODULE,
430                 .name           = "ti_usb_3410_5052_1",
431         },
432         .description            = "TI USB 3410 1 port adapter",
433         .id_table               = ti_id_table_3410,
434         .num_ports              = 1,
435         .attach                 = ti_startup,
436         .release                = ti_release,
437         .port_probe             = ti_port_probe,
438         .port_remove            = ti_port_remove,
439         .open                   = ti_open,
440         .close                  = ti_close,
441         .write                  = ti_write,
442         .write_room             = ti_write_room,
443         .chars_in_buffer        = ti_chars_in_buffer,
444         .tx_empty               = ti_tx_empty,
445         .throttle               = ti_throttle,
446         .unthrottle             = ti_unthrottle,
447         .ioctl                  = ti_ioctl,
448         .set_termios            = ti_set_termios,
449         .tiocmget               = ti_tiocmget,
450         .tiocmset               = ti_tiocmset,
451         .tiocmiwait             = usb_serial_generic_tiocmiwait,
452         .get_icount             = usb_serial_generic_get_icount,
453         .break_ctl              = ti_break,
454         .read_int_callback      = ti_interrupt_callback,
455         .read_bulk_callback     = ti_bulk_in_callback,
456         .write_bulk_callback    = ti_bulk_out_callback,
457 };
458 
459 static struct usb_serial_driver ti_2port_device = {
460         .driver = {
461                 .owner          = THIS_MODULE,
462                 .name           = "ti_usb_3410_5052_2",
463         },
464         .description            = "TI USB 5052 2 port adapter",
465         .id_table               = ti_id_table_5052,
466         .num_ports              = 2,
467         .attach                 = ti_startup,
468         .release                = ti_release,
469         .port_probe             = ti_port_probe,
470         .port_remove            = ti_port_remove,
471         .open                   = ti_open,
472         .close                  = ti_close,
473         .write                  = ti_write,
474         .write_room             = ti_write_room,
475         .chars_in_buffer        = ti_chars_in_buffer,
476         .tx_empty               = ti_tx_empty,
477         .throttle               = ti_throttle,
478         .unthrottle             = ti_unthrottle,
479         .ioctl                  = ti_ioctl,
480         .set_termios            = ti_set_termios,
481         .tiocmget               = ti_tiocmget,
482         .tiocmset               = ti_tiocmset,
483         .tiocmiwait             = usb_serial_generic_tiocmiwait,
484         .get_icount             = usb_serial_generic_get_icount,
485         .break_ctl              = ti_break,
486         .read_int_callback      = ti_interrupt_callback,
487         .read_bulk_callback     = ti_bulk_in_callback,
488         .write_bulk_callback    = ti_bulk_out_callback,
489 };
490 
491 static struct usb_serial_driver * const serial_drivers[] = {
492         &ti_1port_device, &ti_2port_device, NULL
493 };
494 
495 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
496 MODULE_DESCRIPTION(TI_DRIVER_DESC);
497 MODULE_LICENSE("GPL");
498 
499 MODULE_FIRMWARE("ti_3410.fw");
500 MODULE_FIRMWARE("ti_5052.fw");
501 MODULE_FIRMWARE("mts_cdma.fw");
502 MODULE_FIRMWARE("mts_gsm.fw");
503 MODULE_FIRMWARE("mts_edge.fw");
504 MODULE_FIRMWARE("mts_mt9234mu.fw");
505 MODULE_FIRMWARE("mts_mt9234zba.fw");
506 MODULE_FIRMWARE("moxa/moxa-1110.fw");
507 MODULE_FIRMWARE("moxa/moxa-1130.fw");
508 MODULE_FIRMWARE("moxa/moxa-1131.fw");
509 MODULE_FIRMWARE("moxa/moxa-1150.fw");
510 MODULE_FIRMWARE("moxa/moxa-1151.fw");
511 
512 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
513 MODULE_PARM_DESC(closing_wait,
514     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
515 
516 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
517 
518 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
519 
520 static int ti_startup(struct usb_serial *serial)
521 {
522         struct ti_device *tdev;
523         struct usb_device *dev = serial->dev;
524         struct usb_host_interface *cur_altsetting;
525         int num_endpoints;
526         u16 vid, pid;
527         int status;
528 
529         dev_dbg(&dev->dev,
530                 "%s - product 0x%4X, num configurations %d, configuration value %d\n",
531                 __func__, le16_to_cpu(dev->descriptor.idProduct),
532                 dev->descriptor.bNumConfigurations,
533                 dev->actconfig->desc.bConfigurationValue);
534 
535         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
536         if (!tdev)
537                 return -ENOMEM;
538 
539         mutex_init(&tdev->td_open_close_lock);
540         tdev->td_serial = serial;
541         usb_set_serial_data(serial, tdev);
542 
543         /* determine device type */
544         if (serial->type == &ti_1port_device)
545                 tdev->td_is_3410 = 1;
546         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
547                 tdev->td_is_3410 ? "3410" : "5052");
548 
549         vid = le16_to_cpu(dev->descriptor.idVendor);
550         pid = le16_to_cpu(dev->descriptor.idProduct);
551         if (vid == MXU1_VENDOR_ID) {
552                 switch (pid) {
553                 case MXU1_1130_PRODUCT_ID:
554                 case MXU1_1131_PRODUCT_ID:
555                         tdev->td_rs485_only = true;
556                         break;
557                 }
558         }
559 
560         cur_altsetting = serial->interface->cur_altsetting;
561         num_endpoints = cur_altsetting->desc.bNumEndpoints;
562 
563         /* if we have only 1 configuration and 1 endpoint, download firmware */
564         if (dev->descriptor.bNumConfigurations == 1 && num_endpoints == 1) {
565                 status = ti_download_firmware(tdev);
566 
567                 if (status != 0)
568                         goto free_tdev;
569 
570                 /* 3410 must be reset, 5052 resets itself */
571                 if (tdev->td_is_3410) {
572                         msleep_interruptible(100);
573                         usb_reset_device(dev);
574                 }
575 
576                 status = -ENODEV;
577                 goto free_tdev;
578         }
579 
580         /* the second configuration must be set */
581         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
582                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
583                 status = status ? status : -ENODEV;
584                 goto free_tdev;
585         }
586 
587         return 0;
588 
589 free_tdev:
590         kfree(tdev);
591         usb_set_serial_data(serial, NULL);
592         return status;
593 }
594 
595 
596 static void ti_release(struct usb_serial *serial)
597 {
598         struct ti_device *tdev = usb_get_serial_data(serial);
599 
600         kfree(tdev);
601 }
602 
603 static int ti_port_probe(struct usb_serial_port *port)
604 {
605         struct ti_port *tport;
606 
607         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
608         if (!tport)
609                 return -ENOMEM;
610 
611         spin_lock_init(&tport->tp_lock);
612         if (port == port->serial->port[0])
613                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
614         else
615                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
616         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
617         tport->tp_port = port;
618         tport->tp_tdev = usb_get_serial_data(port->serial);
619 
620         if (tport->tp_tdev->td_rs485_only)
621                 tport->tp_uart_mode = TI_UART_485_RECEIVER_DISABLED;
622         else
623                 tport->tp_uart_mode = TI_UART_232;
624 
625         usb_set_serial_port_data(port, tport);
626 
627         port->port.drain_delay = 3;
628 
629         return 0;
630 }
631 
632 static int ti_port_remove(struct usb_serial_port *port)
633 {
634         struct ti_port *tport;
635 
636         tport = usb_get_serial_port_data(port);
637         kfree(tport);
638 
639         return 0;
640 }
641 
642 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
643 {
644         struct ti_port *tport = usb_get_serial_port_data(port);
645         struct ti_device *tdev;
646         struct usb_device *dev;
647         struct urb *urb;
648         int port_number;
649         int status;
650         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINUOUS |
651                              TI_PIPE_TIMEOUT_ENABLE |
652                              (TI_TRANSFER_TIMEOUT << 2));
653 
654         if (tport == NULL)
655                 return -ENODEV;
656 
657         dev = port->serial->dev;
658         tdev = tport->tp_tdev;
659 
660         /* only one open on any port on a device at a time */
661         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
662                 return -ERESTARTSYS;
663 
664         port_number = port->port_number;
665 
666         tport->tp_msr = 0;
667         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
668 
669         /* start interrupt urb the first time a port is opened on this device */
670         if (tdev->td_open_port_count == 0) {
671                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
672                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
673                 if (!urb) {
674                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
675                         status = -EINVAL;
676                         goto release_lock;
677                 }
678                 urb->context = tdev;
679                 status = usb_submit_urb(urb, GFP_KERNEL);
680                 if (status) {
681                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
682                         goto release_lock;
683                 }
684         }
685 
686         if (tty)
687                 ti_set_termios(tty, port, &tty->termios);
688 
689         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
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         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
699         status = ti_command_out_sync(tdev, TI_START_PORT,
700                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
701         if (status) {
702                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
703                                                         __func__, status);
704                 goto unlink_int_urb;
705         }
706 
707         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
708         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
709                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
710         if (status) {
711                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
712                                                         __func__, status);
713                 goto unlink_int_urb;
714         }
715         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
716                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
717         if (status) {
718                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
719                                                         __func__, status);
720                 goto unlink_int_urb;
721         }
722 
723         /* reset the data toggle on the bulk endpoints to work around bug in
724          * host controllers where things get out of sync some times */
725         usb_clear_halt(dev, port->write_urb->pipe);
726         usb_clear_halt(dev, port->read_urb->pipe);
727 
728         if (tty)
729                 ti_set_termios(tty, port, &tty->termios);
730 
731         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
732         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
733                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
734         if (status) {
735                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
736                                                         __func__, status);
737                 goto unlink_int_urb;
738         }
739 
740         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
741         status = ti_command_out_sync(tdev, TI_START_PORT,
742                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
743         if (status) {
744                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
745                                                         __func__, status);
746                 goto unlink_int_urb;
747         }
748 
749         /* start read urb */
750         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
751         urb = port->read_urb;
752         if (!urb) {
753                 dev_err(&port->dev, "%s - no read urb\n", __func__);
754                 status = -EINVAL;
755                 goto unlink_int_urb;
756         }
757         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
758         urb->context = tport;
759         status = usb_submit_urb(urb, GFP_KERNEL);
760         if (status) {
761                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
762                                                         __func__, status);
763                 goto unlink_int_urb;
764         }
765 
766         tport->tp_is_open = 1;
767         ++tdev->td_open_port_count;
768 
769         goto release_lock;
770 
771 unlink_int_urb:
772         if (tdev->td_open_port_count == 0)
773                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
774 release_lock:
775         mutex_unlock(&tdev->td_open_close_lock);
776         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
777         return status;
778 }
779 
780 
781 static void ti_close(struct usb_serial_port *port)
782 {
783         struct ti_device *tdev;
784         struct ti_port *tport;
785         int port_number;
786         int status;
787         int do_unlock;
788         unsigned long flags;
789 
790         tdev = usb_get_serial_data(port->serial);
791         tport = usb_get_serial_port_data(port);
792         if (tdev == NULL || tport == NULL)
793                 return;
794 
795         tport->tp_is_open = 0;
796 
797         usb_kill_urb(port->read_urb);
798         usb_kill_urb(port->write_urb);
799         tport->tp_write_urb_in_use = 0;
800         spin_lock_irqsave(&tport->tp_lock, flags);
801         kfifo_reset_out(&port->write_fifo);
802         spin_unlock_irqrestore(&tport->tp_lock, flags);
803 
804         port_number = port->port_number;
805 
806         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
807         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
808                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
809         if (status)
810                 dev_err(&port->dev,
811                         "%s - cannot send close port command, %d\n"
812                                                         , __func__, status);
813 
814         /* if mutex_lock is interrupted, continue anyway */
815         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
816         --tport->tp_tdev->td_open_port_count;
817         if (tport->tp_tdev->td_open_port_count <= 0) {
818                 /* last port is closed, shut down interrupt urb */
819                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
820                 tport->tp_tdev->td_open_port_count = 0;
821         }
822         if (do_unlock)
823                 mutex_unlock(&tdev->td_open_close_lock);
824 }
825 
826 
827 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
828                         const unsigned char *data, int count)
829 {
830         struct ti_port *tport = usb_get_serial_port_data(port);
831 
832         if (count == 0) {
833                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
834                 return 0;
835         }
836 
837         if (tport == NULL || !tport->tp_is_open)
838                 return -ENODEV;
839 
840         count = kfifo_in_locked(&port->write_fifo, data, count,
841                                                         &tport->tp_lock);
842         ti_send(tport);
843 
844         return count;
845 }
846 
847 
848 static int ti_write_room(struct tty_struct *tty)
849 {
850         struct usb_serial_port *port = tty->driver_data;
851         struct ti_port *tport = usb_get_serial_port_data(port);
852         int room = 0;
853         unsigned long flags;
854 
855         if (tport == NULL)
856                 return 0;
857 
858         spin_lock_irqsave(&tport->tp_lock, flags);
859         room = kfifo_avail(&port->write_fifo);
860         spin_unlock_irqrestore(&tport->tp_lock, flags);
861 
862         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
863         return room;
864 }
865 
866 
867 static int ti_chars_in_buffer(struct tty_struct *tty)
868 {
869         struct usb_serial_port *port = tty->driver_data;
870         struct ti_port *tport = usb_get_serial_port_data(port);
871         int chars = 0;
872         unsigned long flags;
873 
874         if (tport == NULL)
875                 return 0;
876 
877         spin_lock_irqsave(&tport->tp_lock, flags);
878         chars = kfifo_len(&port->write_fifo);
879         spin_unlock_irqrestore(&tport->tp_lock, flags);
880 
881         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
882         return chars;
883 }
884 
885 static bool ti_tx_empty(struct usb_serial_port *port)
886 {
887         struct ti_port *tport = usb_get_serial_port_data(port);
888         int ret;
889         u8 lsr;
890 
891         ret = ti_get_lsr(tport, &lsr);
892         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
893                 return false;
894 
895         return true;
896 }
897 
898 static void ti_throttle(struct tty_struct *tty)
899 {
900         struct usb_serial_port *port = tty->driver_data;
901         struct ti_port *tport = usb_get_serial_port_data(port);
902 
903         if (tport == NULL)
904                 return;
905 
906         if (I_IXOFF(tty) || C_CRTSCTS(tty))
907                 ti_stop_read(tport, tty);
908 
909 }
910 
911 
912 static void ti_unthrottle(struct tty_struct *tty)
913 {
914         struct usb_serial_port *port = tty->driver_data;
915         struct ti_port *tport = usb_get_serial_port_data(port);
916         int status;
917 
918         if (tport == NULL)
919                 return;
920 
921         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
922                 status = ti_restart_read(tport, tty);
923                 if (status)
924                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
925                                                         __func__, status);
926         }
927 }
928 
929 static int ti_ioctl(struct tty_struct *tty,
930         unsigned int cmd, unsigned long arg)
931 {
932         struct usb_serial_port *port = tty->driver_data;
933         struct ti_port *tport = usb_get_serial_port_data(port);
934 
935         if (tport == NULL)
936                 return -ENODEV;
937 
938         switch (cmd) {
939         case TIOCGSERIAL:
940                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
941                 return ti_get_serial_info(tport,
942                                 (struct serial_struct __user *)arg);
943         case TIOCSSERIAL:
944                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
945                 return ti_set_serial_info(tty, tport,
946                                 (struct serial_struct __user *)arg);
947         }
948         return -ENOIOCTLCMD;
949 }
950 
951 
952 static void ti_set_termios(struct tty_struct *tty,
953                 struct usb_serial_port *port, struct ktermios *old_termios)
954 {
955         struct ti_port *tport = usb_get_serial_port_data(port);
956         struct ti_uart_config *config;
957         tcflag_t cflag, iflag;
958         int baud;
959         int status;
960         int port_number = port->port_number;
961         unsigned int mcr;
962 
963         cflag = tty->termios.c_cflag;
964         iflag = tty->termios.c_iflag;
965 
966         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
967         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
968                 old_termios->c_cflag, old_termios->c_iflag);
969 
970         if (tport == NULL)
971                 return;
972 
973         config = kmalloc(sizeof(*config), GFP_KERNEL);
974         if (!config)
975                 return;
976 
977         config->wFlags = 0;
978 
979         /* these flags must be set */
980         config->wFlags |= TI_UART_ENABLE_MS_INTS;
981         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
982         config->bUartMode = (__u8)(tport->tp_uart_mode);
983 
984         switch (cflag & CSIZE) {
985         case CS5:
986                     config->bDataBits = TI_UART_5_DATA_BITS;
987                     break;
988         case CS6:
989                     config->bDataBits = TI_UART_6_DATA_BITS;
990                     break;
991         case CS7:
992                     config->bDataBits = TI_UART_7_DATA_BITS;
993                     break;
994         default:
995         case CS8:
996                     config->bDataBits = TI_UART_8_DATA_BITS;
997                     break;
998         }
999 
1000         /* CMSPAR isn't supported by this driver */
1001         tty->termios.c_cflag &= ~CMSPAR;
1002 
1003         if (cflag & PARENB) {
1004                 if (cflag & PARODD) {
1005                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
1006                         config->bParity = TI_UART_ODD_PARITY;
1007                 } else {
1008                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
1009                         config->bParity = TI_UART_EVEN_PARITY;
1010                 }
1011         } else {
1012                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
1013                 config->bParity = TI_UART_NO_PARITY;
1014         }
1015 
1016         if (cflag & CSTOPB)
1017                 config->bStopBits = TI_UART_2_STOP_BITS;
1018         else
1019                 config->bStopBits = TI_UART_1_STOP_BITS;
1020 
1021         if (cflag & CRTSCTS) {
1022                 /* RTS flow control must be off to drop RTS for baud rate B0 */
1023                 if ((cflag & CBAUD) != B0)
1024                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
1025                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
1026         } else {
1027                 ti_restart_read(tport, tty);
1028         }
1029 
1030         if (I_IXOFF(tty) || I_IXON(tty)) {
1031                 config->cXon  = START_CHAR(tty);
1032                 config->cXoff = STOP_CHAR(tty);
1033 
1034                 if (I_IXOFF(tty))
1035                         config->wFlags |= TI_UART_ENABLE_X_IN;
1036                 else
1037                         ti_restart_read(tport, tty);
1038 
1039                 if (I_IXON(tty))
1040                         config->wFlags |= TI_UART_ENABLE_X_OUT;
1041         }
1042 
1043         baud = tty_get_baud_rate(tty);
1044         if (!baud)
1045                 baud = 9600;
1046         if (tport->tp_tdev->td_is_3410)
1047                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
1048         else
1049                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
1050 
1051         /* FIXME: Should calculate resulting baud here and report it back */
1052         if ((cflag & CBAUD) != B0)
1053                 tty_encode_baud_rate(tty, baud, baud);
1054 
1055         dev_dbg(&port->dev,
1056                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
1057                 __func__, baud, config->wBaudRate, config->wFlags,
1058                 config->bDataBits, config->bParity, config->bStopBits,
1059                 config->cXon, config->cXoff, config->bUartMode);
1060 
1061         cpu_to_be16s(&config->wBaudRate);
1062         cpu_to_be16s(&config->wFlags);
1063 
1064         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1065                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1066                 sizeof(*config));
1067         if (status)
1068                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
1069                                         __func__, port_number, status);
1070 
1071         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1072         mcr = tport->tp_shadow_mcr;
1073         /* if baud rate is B0, clear RTS and DTR */
1074         if ((cflag & CBAUD) == B0)
1075                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1076         status = ti_set_mcr(tport, mcr);
1077         if (status)
1078                 dev_err(&port->dev,
1079                         "%s - cannot set modem control on port %d, %d\n",
1080                                                 __func__, port_number, status);
1081 
1082         kfree(config);
1083 }
1084 
1085 
1086 static int ti_tiocmget(struct tty_struct *tty)
1087 {
1088         struct usb_serial_port *port = tty->driver_data;
1089         struct ti_port *tport = usb_get_serial_port_data(port);
1090         unsigned int result;
1091         unsigned int msr;
1092         unsigned int mcr;
1093         unsigned long flags;
1094 
1095         if (tport == NULL)
1096                 return -ENODEV;
1097 
1098         spin_lock_irqsave(&tport->tp_lock, flags);
1099         msr = tport->tp_msr;
1100         mcr = tport->tp_shadow_mcr;
1101         spin_unlock_irqrestore(&tport->tp_lock, flags);
1102 
1103         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1104                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1105                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1106                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1107                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1108                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1109                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1110 
1111         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1112 
1113         return result;
1114 }
1115 
1116 
1117 static int ti_tiocmset(struct tty_struct *tty,
1118                                 unsigned int set, unsigned int clear)
1119 {
1120         struct usb_serial_port *port = tty->driver_data;
1121         struct ti_port *tport = usb_get_serial_port_data(port);
1122         unsigned int mcr;
1123         unsigned long flags;
1124 
1125         if (tport == NULL)
1126                 return -ENODEV;
1127 
1128         spin_lock_irqsave(&tport->tp_lock, flags);
1129         mcr = tport->tp_shadow_mcr;
1130 
1131         if (set & TIOCM_RTS)
1132                 mcr |= TI_MCR_RTS;
1133         if (set & TIOCM_DTR)
1134                 mcr |= TI_MCR_DTR;
1135         if (set & TIOCM_LOOP)
1136                 mcr |= TI_MCR_LOOP;
1137 
1138         if (clear & TIOCM_RTS)
1139                 mcr &= ~TI_MCR_RTS;
1140         if (clear & TIOCM_DTR)
1141                 mcr &= ~TI_MCR_DTR;
1142         if (clear & TIOCM_LOOP)
1143                 mcr &= ~TI_MCR_LOOP;
1144         spin_unlock_irqrestore(&tport->tp_lock, flags);
1145 
1146         return ti_set_mcr(tport, mcr);
1147 }
1148 
1149 
1150 static void ti_break(struct tty_struct *tty, int break_state)
1151 {
1152         struct usb_serial_port *port = tty->driver_data;
1153         struct ti_port *tport = usb_get_serial_port_data(port);
1154         int status;
1155 
1156         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
1157 
1158         if (tport == NULL)
1159                 return;
1160 
1161         status = ti_write_byte(port, tport->tp_tdev,
1162                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1163                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1164 
1165         if (status)
1166                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
1167 }
1168 
1169 static int ti_get_port_from_code(unsigned char code)
1170 {
1171         return (code >> 4) - 3;
1172 }
1173 
1174 static int ti_get_func_from_code(unsigned char code)
1175 {
1176         return code & 0x0f;
1177 }
1178 
1179 static void ti_interrupt_callback(struct urb *urb)
1180 {
1181         struct ti_device *tdev = urb->context;
1182         struct usb_serial_port *port;
1183         struct usb_serial *serial = tdev->td_serial;
1184         struct ti_port *tport;
1185         struct device *dev = &urb->dev->dev;
1186         unsigned char *data = urb->transfer_buffer;
1187         int length = urb->actual_length;
1188         int port_number;
1189         int function;
1190         int status = urb->status;
1191         int retval;
1192         __u8 msr;
1193 
1194         switch (status) {
1195         case 0:
1196                 break;
1197         case -ECONNRESET:
1198         case -ENOENT:
1199         case -ESHUTDOWN:
1200                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1201                 tdev->td_urb_error = 1;
1202                 return;
1203         default:
1204                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1205                 tdev->td_urb_error = 1;
1206                 goto exit;
1207         }
1208 
1209         if (length != 2) {
1210                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1211                 goto exit;
1212         }
1213 
1214         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1215                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1216                 goto exit;
1217         }
1218 
1219         port_number = ti_get_port_from_code(data[0]);
1220         function = ti_get_func_from_code(data[0]);
1221 
1222         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1223                 __func__, port_number, function, data[1]);
1224 
1225         if (port_number >= serial->num_ports) {
1226                 dev_err(dev, "%s - bad port number, %d\n",
1227                                                 __func__, port_number);
1228                 goto exit;
1229         }
1230 
1231         port = serial->port[port_number];
1232 
1233         tport = usb_get_serial_port_data(port);
1234         if (!tport)
1235                 goto exit;
1236 
1237         switch (function) {
1238         case TI_CODE_DATA_ERROR:
1239                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1240                         __func__, port_number, data[1]);
1241                 break;
1242 
1243         case TI_CODE_MODEM_STATUS:
1244                 msr = data[1];
1245                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1246                 ti_handle_new_msr(tport, msr);
1247                 break;
1248 
1249         default:
1250                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1251                                                         __func__, data[1]);
1252                 break;
1253         }
1254 
1255 exit:
1256         retval = usb_submit_urb(urb, GFP_ATOMIC);
1257         if (retval)
1258                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1259                         __func__, retval);
1260 }
1261 
1262 
1263 static void ti_bulk_in_callback(struct urb *urb)
1264 {
1265         struct ti_port *tport = urb->context;
1266         struct usb_serial_port *port = tport->tp_port;
1267         struct device *dev = &urb->dev->dev;
1268         int status = urb->status;
1269         int retval = 0;
1270 
1271         switch (status) {
1272         case 0:
1273                 break;
1274         case -ECONNRESET:
1275         case -ENOENT:
1276         case -ESHUTDOWN:
1277                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1278                 tport->tp_tdev->td_urb_error = 1;
1279                 return;
1280         default:
1281                 dev_err(dev, "%s - nonzero urb status, %d\n",
1282                         __func__, status);
1283                 tport->tp_tdev->td_urb_error = 1;
1284         }
1285 
1286         if (status == -EPIPE)
1287                 goto exit;
1288 
1289         if (status) {
1290                 dev_err(dev, "%s - stopping read!\n", __func__);
1291                 return;
1292         }
1293 
1294         if (urb->actual_length) {
1295                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1296                                       urb->transfer_buffer);
1297 
1298                 if (!tport->tp_is_open)
1299                         dev_dbg(dev, "%s - port closed, dropping data\n",
1300                                 __func__);
1301                 else
1302                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1303                 spin_lock(&tport->tp_lock);
1304                 port->icount.rx += urb->actual_length;
1305                 spin_unlock(&tport->tp_lock);
1306         }
1307 
1308 exit:
1309         /* continue to read unless stopping */
1310         spin_lock(&tport->tp_lock);
1311         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1312                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1313         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1314                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1315 
1316         spin_unlock(&tport->tp_lock);
1317         if (retval)
1318                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1319                         __func__, retval);
1320 }
1321 
1322 
1323 static void ti_bulk_out_callback(struct urb *urb)
1324 {
1325         struct ti_port *tport = urb->context;
1326         struct usb_serial_port *port = tport->tp_port;
1327         int status = urb->status;
1328 
1329         tport->tp_write_urb_in_use = 0;
1330 
1331         switch (status) {
1332         case 0:
1333                 break;
1334         case -ECONNRESET:
1335         case -ENOENT:
1336         case -ESHUTDOWN:
1337                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1338                 tport->tp_tdev->td_urb_error = 1;
1339                 return;
1340         default:
1341                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1342                         __func__, status);
1343                 tport->tp_tdev->td_urb_error = 1;
1344         }
1345 
1346         /* send any buffered data */
1347         ti_send(tport);
1348 }
1349 
1350 
1351 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1352                 int length)
1353 {
1354         int cnt;
1355 
1356         do {
1357                 cnt = tty_insert_flip_string(&port->port, data, length);
1358                 if (cnt < length) {
1359                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1360                                                 __func__, length - cnt);
1361                         if (cnt == 0)
1362                                 break;
1363                 }
1364                 tty_flip_buffer_push(&port->port);
1365                 data += cnt;
1366                 length -= cnt;
1367         } while (length > 0);
1368 }
1369 
1370 
1371 static void ti_send(struct ti_port *tport)
1372 {
1373         int count, result;
1374         struct usb_serial_port *port = tport->tp_port;
1375         unsigned long flags;
1376 
1377         spin_lock_irqsave(&tport->tp_lock, flags);
1378 
1379         if (tport->tp_write_urb_in_use)
1380                 goto unlock;
1381 
1382         count = kfifo_out(&port->write_fifo,
1383                                 port->write_urb->transfer_buffer,
1384                                 port->bulk_out_size);
1385 
1386         if (count == 0)
1387                 goto unlock;
1388 
1389         tport->tp_write_urb_in_use = 1;
1390 
1391         spin_unlock_irqrestore(&tport->tp_lock, flags);
1392 
1393         usb_serial_debug_data(&port->dev, __func__, count,
1394                               port->write_urb->transfer_buffer);
1395 
1396         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1397                            usb_sndbulkpipe(port->serial->dev,
1398                                             port->bulk_out_endpointAddress),
1399                            port->write_urb->transfer_buffer, count,
1400                            ti_bulk_out_callback, tport);
1401 
1402         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1403         if (result) {
1404                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1405                                                         __func__, result);
1406                 tport->tp_write_urb_in_use = 0;
1407                 /* TODO: reschedule ti_send */
1408         } else {
1409                 spin_lock_irqsave(&tport->tp_lock, flags);
1410                 port->icount.tx += count;
1411                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1412         }
1413 
1414         /* more room in the buffer for new writes, wakeup */
1415         tty_port_tty_wakeup(&port->port);
1416 
1417         return;
1418 unlock:
1419         spin_unlock_irqrestore(&tport->tp_lock, flags);
1420         return;
1421 }
1422 
1423 
1424 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1425 {
1426         unsigned long flags;
1427         int status;
1428 
1429         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1430                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1431                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1432 
1433         spin_lock_irqsave(&tport->tp_lock, flags);
1434         if (!status)
1435                 tport->tp_shadow_mcr = mcr;
1436         spin_unlock_irqrestore(&tport->tp_lock, flags);
1437 
1438         return status;
1439 }
1440 
1441 
1442 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1443 {
1444         int size, status;
1445         struct ti_device *tdev = tport->tp_tdev;
1446         struct usb_serial_port *port = tport->tp_port;
1447         int port_number = port->port_number;
1448         struct ti_port_status *data;
1449 
1450         size = sizeof(struct ti_port_status);
1451         data = kmalloc(size, GFP_KERNEL);
1452         if (!data)
1453                 return -ENOMEM;
1454 
1455         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1456                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1457         if (status) {
1458                 dev_err(&port->dev,
1459                         "%s - get port status command failed, %d\n",
1460                                                         __func__, status);
1461                 goto free_data;
1462         }
1463 
1464         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1465 
1466         *lsr = data->bLSR;
1467 
1468 free_data:
1469         kfree(data);
1470         return status;
1471 }
1472 
1473 
1474 static int ti_get_serial_info(struct ti_port *tport,
1475         struct serial_struct __user *ret_arg)
1476 {
1477         struct usb_serial_port *port = tport->tp_port;
1478         struct serial_struct ret_serial;
1479         unsigned cwait;
1480 
1481         if (!ret_arg)
1482                 return -EFAULT;
1483 
1484         cwait = port->port.closing_wait;
1485         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1486                 cwait = jiffies_to_msecs(cwait) / 10;
1487 
1488         memset(&ret_serial, 0, sizeof(ret_serial));
1489 
1490         ret_serial.type = PORT_16550A;
1491         ret_serial.line = port->minor;
1492         ret_serial.port = port->port_number;
1493         ret_serial.flags = tport->tp_flags;
1494         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1495         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1496         ret_serial.closing_wait = cwait;
1497 
1498         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1499                 return -EFAULT;
1500 
1501         return 0;
1502 }
1503 
1504 
1505 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1506         struct serial_struct __user *new_arg)
1507 {
1508         struct serial_struct new_serial;
1509         unsigned cwait;
1510 
1511         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1512                 return -EFAULT;
1513 
1514         cwait = new_serial.closing_wait;
1515         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1516                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1517 
1518         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1519         tport->tp_port->port.closing_wait = cwait;
1520 
1521         return 0;
1522 }
1523 
1524 
1525 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1526 {
1527         struct async_icount *icount;
1528         struct tty_struct *tty;
1529         unsigned long flags;
1530 
1531         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1532 
1533         if (msr & TI_MSR_DELTA_MASK) {
1534                 spin_lock_irqsave(&tport->tp_lock, flags);
1535                 icount = &tport->tp_port->icount;
1536                 if (msr & TI_MSR_DELTA_CTS)
1537                         icount->cts++;
1538                 if (msr & TI_MSR_DELTA_DSR)
1539                         icount->dsr++;
1540                 if (msr & TI_MSR_DELTA_CD)
1541                         icount->dcd++;
1542                 if (msr & TI_MSR_DELTA_RI)
1543                         icount->rng++;
1544                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1545                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1546         }
1547 
1548         tport->tp_msr = msr & TI_MSR_MASK;
1549 
1550         /* handle CTS flow control */
1551         tty = tty_port_tty_get(&tport->tp_port->port);
1552         if (tty && C_CRTSCTS(tty)) {
1553                 if (msr & TI_MSR_CTS)
1554                         tty_wakeup(tty);
1555         }
1556         tty_kref_put(tty);
1557 }
1558 
1559 
1560 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1561 {
1562         unsigned long flags;
1563 
1564         spin_lock_irqsave(&tport->tp_lock, flags);
1565 
1566         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1567                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1568 
1569         spin_unlock_irqrestore(&tport->tp_lock, flags);
1570 }
1571 
1572 
1573 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1574 {
1575         struct urb *urb;
1576         int status = 0;
1577         unsigned long flags;
1578 
1579         spin_lock_irqsave(&tport->tp_lock, flags);
1580 
1581         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1582                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1583                 urb = tport->tp_port->read_urb;
1584                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1585                 urb->context = tport;
1586                 status = usb_submit_urb(urb, GFP_KERNEL);
1587         } else  {
1588                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1589                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1590         }
1591 
1592         return status;
1593 }
1594 
1595 
1596 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1597         __u16 moduleid, __u16 value, __u8 *data, int size)
1598 {
1599         int status;
1600 
1601         status = usb_control_msg(tdev->td_serial->dev,
1602                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1603                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1604                 value, moduleid, data, size, 1000);
1605 
1606         if (status == size)
1607                 status = 0;
1608 
1609         if (status > 0)
1610                 status = -ECOMM;
1611 
1612         return status;
1613 }
1614 
1615 
1616 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1617         __u16 moduleid, __u16 value, __u8 *data, int size)
1618 {
1619         int status;
1620 
1621         status = usb_control_msg(tdev->td_serial->dev,
1622                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1623                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1624                 value, moduleid, data, size, 1000);
1625 
1626         if (status == size)
1627                 status = 0;
1628 
1629         if (status > 0)
1630                 status = -ECOMM;
1631 
1632         return status;
1633 }
1634 
1635 
1636 static int ti_write_byte(struct usb_serial_port *port,
1637                         struct ti_device *tdev, unsigned long addr,
1638                         __u8 mask, __u8 byte)
1639 {
1640         int status;
1641         unsigned int size;
1642         struct ti_write_data_bytes *data;
1643 
1644         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1645                 addr, mask, byte);
1646 
1647         size = sizeof(struct ti_write_data_bytes) + 2;
1648         data = kmalloc(size, GFP_KERNEL);
1649         if (!data)
1650                 return -ENOMEM;
1651 
1652         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1653         data->bDataType = TI_RW_DATA_BYTE;
1654         data->bDataCounter = 1;
1655         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1656         data->wBaseAddrLo = cpu_to_be16(addr);
1657         data->bData[0] = mask;
1658         data->bData[1] = byte;
1659 
1660         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1661                 (__u8 *)data, size);
1662 
1663         if (status < 0)
1664                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1665 
1666         kfree(data);
1667 
1668         return status;
1669 }
1670 
1671 static int ti_do_download(struct usb_device *dev, int pipe,
1672                                                 u8 *buffer, int size)
1673 {
1674         int pos;
1675         u8 cs = 0;
1676         int done;
1677         struct ti_firmware_header *header;
1678         int status = 0;
1679         int len;
1680 
1681         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1682                 cs = (__u8)(cs + buffer[pos]);
1683 
1684         header = (struct ti_firmware_header *)buffer;
1685         header->wLength = cpu_to_le16((__u16)(size
1686                                         - sizeof(struct ti_firmware_header)));
1687         header->bCheckSum = cs;
1688 
1689         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1690         for (pos = 0; pos < size; pos += done) {
1691                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1692                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1693                                                                 &done, 1000);
1694                 if (status)
1695                         break;
1696         }
1697         return status;
1698 }
1699 
1700 static int ti_download_firmware(struct ti_device *tdev)
1701 {
1702         int status;
1703         int buffer_size;
1704         __u8 *buffer;
1705         struct usb_device *dev = tdev->td_serial->dev;
1706         unsigned int pipe = usb_sndbulkpipe(dev,
1707                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1708         const struct firmware *fw_p;
1709         char buf[32];
1710 
1711         if (le16_to_cpu(dev->descriptor.idVendor) == MXU1_VENDOR_ID) {
1712                 snprintf(buf,
1713                         sizeof(buf),
1714                         "moxa/moxa-%04x.fw",
1715                         le16_to_cpu(dev->descriptor.idProduct));
1716 
1717                 status = request_firmware(&fw_p, buf, &dev->dev);
1718                 goto check_firmware;
1719         }
1720 
1721         /* try ID specific firmware first, then try generic firmware */
1722         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1723                         le16_to_cpu(dev->descriptor.idVendor),
1724                         le16_to_cpu(dev->descriptor.idProduct));
1725         status = request_firmware(&fw_p, buf, &dev->dev);
1726 
1727         if (status != 0) {
1728                 buf[0] = '\0';
1729                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1730                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1731                         case MTS_CDMA_PRODUCT_ID:
1732                                 strcpy(buf, "mts_cdma.fw");
1733                                 break;
1734                         case MTS_GSM_PRODUCT_ID:
1735                                 strcpy(buf, "mts_gsm.fw");
1736                                 break;
1737                         case MTS_EDGE_PRODUCT_ID:
1738                                 strcpy(buf, "mts_edge.fw");
1739                                 break;
1740                         case MTS_MT9234MU_PRODUCT_ID:
1741                                 strcpy(buf, "mts_mt9234mu.fw");
1742                                 break;
1743                         case MTS_MT9234ZBA_PRODUCT_ID:
1744                                 strcpy(buf, "mts_mt9234zba.fw");
1745                                 break;
1746                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1747                                 strcpy(buf, "mts_mt9234zba.fw");
1748                                 break;                  }
1749                 }
1750                 if (buf[0] == '\0') {
1751                         if (tdev->td_is_3410)
1752                                 strcpy(buf, "ti_3410.fw");
1753                         else
1754                                 strcpy(buf, "ti_5052.fw");
1755                 }
1756                 status = request_firmware(&fw_p, buf, &dev->dev);
1757         }
1758 
1759 check_firmware:
1760         if (status) {
1761                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1762                 return -ENOENT;
1763         }
1764         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1765                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1766                 release_firmware(fw_p);
1767                 return -ENOENT;
1768         }
1769 
1770         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1771         buffer = kmalloc(buffer_size, GFP_KERNEL);
1772         if (buffer) {
1773                 memcpy(buffer, fw_p->data, fw_p->size);
1774                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1775                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1776                 kfree(buffer);
1777         } else {
1778                 status = -ENOMEM;
1779         }
1780         release_firmware(fw_p);
1781         if (status) {
1782                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1783                                                         __func__, status);
1784                 return status;
1785         }
1786 
1787         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1788 
1789         return 0;
1790 }
1791 

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