1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Edgeport USB Serial Converter driver
4 *
5 * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
7 *
8 * Supports the following devices:
9 * EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
10 *
11 * For questions or problems with this driver, contact Inside Out
12 * Networks technical support, or Peter Berger <pberger@brimson.com>,
13 * or Al Borchers <alborchers@steinerpoint.com>.
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/jiffies.h>
18 #include <linux/errno.h>
19 #include <linux/slab.h>
20 #include <linux/tty.h>
21 #include <linux/tty_driver.h>
22 #include <linux/tty_flip.h>
23 #include <linux/module.h>
24 #include <linux/spinlock.h>
25 #include <linux/mutex.h>
26 #include <linux/serial.h>
27 #include <linux/swab.h>
28 #include <linux/kfifo.h>
29 #include <linux/ioctl.h>
30 #include <linux/firmware.h>
31 #include <linux/uaccess.h>
32 #include <linux/usb.h>
33 #include <linux/usb/serial.h>
34
35 #include "io_16654.h"
36 #include "io_usbvend.h"
37 #include "io_ti.h"
38
39 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
40 #define DRIVER_DESC "Edgeport USB Serial Driver"
41
42 #define EPROM_PAGE_SIZE 64
43
44
45 /* different hardware types */
46 #define HARDWARE_TYPE_930 0
47 #define HARDWARE_TYPE_TIUMP 1
48
49 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
50 #define TI_MODE_CONFIGURING 0 /* Device has not entered start device */
51 #define TI_MODE_BOOT 1 /* Staying in boot mode */
52 #define TI_MODE_DOWNLOAD 2 /* Made it to download mode */
53 #define TI_MODE_TRANSITIONING 3 /*
54 * Currently in boot mode but
55 * transitioning to download mode
56 */
57
58 /* read urb state */
59 #define EDGE_READ_URB_RUNNING 0
60 #define EDGE_READ_URB_STOPPING 1
61 #define EDGE_READ_URB_STOPPED 2
62
63
64 /* Product information read from the Edgeport */
65 struct product_info {
66 int TiMode; /* Current TI Mode */
67 u8 hardware_type; /* Type of hardware */
68 } __packed;
69
70 /*
71 * Edgeport firmware header
72 *
73 * "build_number" has been set to 0 in all three of the images I have
74 * seen, and Digi Tech Support suggests that it is safe to ignore it.
75 *
76 * "length" is the number of bytes of actual data following the header.
77 *
78 * "checksum" is the low order byte resulting from adding the values of
79 * all the data bytes.
80 */
81 struct edgeport_fw_hdr {
82 u8 major_version;
83 u8 minor_version;
84 __le16 build_number;
85 __le16 length;
86 u8 checksum;
87 } __packed;
88
89 struct edgeport_port {
90 u16 uart_base;
91 u16 dma_address;
92 u8 shadow_msr;
93 u8 shadow_mcr;
94 u8 shadow_lsr;
95 u8 lsr_mask;
96 u32 ump_read_timeout; /*
97 * Number of milliseconds the UMP will
98 * wait without data before completing
99 * a read short
100 */
101 int baud_rate;
102 int close_pending;
103 int lsr_event;
104
105 struct edgeport_serial *edge_serial;
106 struct usb_serial_port *port;
107 u8 bUartMode; /* Port type, 0: RS232, etc. */
108 spinlock_t ep_lock;
109 int ep_read_urb_state;
110 int ep_write_urb_in_use;
111 };
112
113 struct edgeport_serial {
114 struct product_info product_info;
115 u8 TI_I2C_Type; /* Type of I2C in UMP */
116 u8 TiReadI2C; /*
117 * Set to TRUE if we have read the
118 * I2c in Boot Mode
119 */
120 struct mutex es_lock;
121 int num_ports_open;
122 struct usb_serial *serial;
123 struct delayed_work heartbeat_work;
124 int fw_version;
125 bool use_heartbeat;
126 };
127
128
129 /* Devices that this driver supports */
130 static const struct usb_device_id edgeport_1port_id_table[] = {
131 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
132 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
133 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
134 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
135 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
136 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
137 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
138 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
147 { }
148 };
149
150 static const struct usb_device_id edgeport_2port_id_table[] = {
151 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
153 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
154 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
155 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
156 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
157 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
158 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
163 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
169 { }
170 };
171
172 /* Devices that this driver supports */
173 static const struct usb_device_id id_table_combined[] = {
174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
175 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
176 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
177 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
178 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
179 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
180 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
181 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
195 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
196 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
197 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
198 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
199 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
200 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
201 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
202 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
203 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
204 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
205 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
206 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
207 { }
208 };
209
210 MODULE_DEVICE_TABLE(usb, id_table_combined);
211
212 static bool ignore_cpu_rev;
213 static int default_uart_mode; /* RS232 */
214
215 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
216 int length);
217
218 static void stop_read(struct edgeport_port *edge_port);
219 static int restart_read(struct edgeport_port *edge_port);
220
221 static void edge_set_termios(struct tty_struct *tty,
222 struct usb_serial_port *port, struct ktermios *old_termios);
223 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
224
225 static int do_download_mode(struct edgeport_serial *serial,
226 const struct firmware *fw);
227 static int do_boot_mode(struct edgeport_serial *serial,
228 const struct firmware *fw);
229
230 /* sysfs attributes */
231 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
232 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
233
234 /*
235 * Some release of Edgeport firmware "down3.bin" after version 4.80
236 * introduced code to automatically disconnect idle devices on some
237 * Edgeport models after periods of inactivity, typically ~60 seconds.
238 * This occurs without regard to whether ports on the device are open
239 * or not. Digi International Tech Support suggested:
240 *
241 * 1. Adding driver "heartbeat" code to reset the firmware timer by
242 * requesting a descriptor record every 15 seconds, which should be
243 * effective with newer firmware versions that require it, and benign
244 * with older versions that do not. In practice 40 seconds seems often
245 * enough.
246 * 2. The heartbeat code is currently required only on Edgeport/416 models.
247 */
248 #define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80)
249 #define FW_HEARTBEAT_SECS 40
250
251 /* Timeouts in msecs: firmware downloads take longer */
252 #define TI_VSEND_TIMEOUT_DEFAULT 1000
253 #define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000
254
ti_vread_sync(struct usb_device * dev,u8 request,u16 value,u16 index,void * data,int size)255 static int ti_vread_sync(struct usb_device *dev, u8 request, u16 value,
256 u16 index, void *data, int size)
257 {
258 int status;
259
260 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
261 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
262 value, index, data, size, 1000);
263 if (status < 0)
264 return status;
265 if (status != size) {
266 dev_dbg(&dev->dev, "%s - wanted to read %d, but only read %d\n",
267 __func__, size, status);
268 return -ECOMM;
269 }
270 return 0;
271 }
272
ti_vsend_sync(struct usb_device * dev,u8 request,u16 value,u16 index,void * data,int size,int timeout)273 static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value,
274 u16 index, void *data, int size, int timeout)
275 {
276 int status;
277
278 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
279 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
280 value, index, data, size, timeout);
281 if (status < 0)
282 return status;
283
284 return 0;
285 }
286
read_port_cmd(struct usb_serial_port * port,u8 command,u16 value,void * data,int size)287 static int read_port_cmd(struct usb_serial_port *port, u8 command, u16 value,
288 void *data, int size)
289 {
290 return ti_vread_sync(port->serial->dev, command, value,
291 UMPM_UART1_PORT + port->port_number,
292 data, size);
293 }
294
send_port_cmd(struct usb_serial_port * port,u8 command,u16 value,void * data,int size)295 static int send_port_cmd(struct usb_serial_port *port, u8 command, u16 value,
296 void *data, int size)
297 {
298 return ti_vsend_sync(port->serial->dev, command, value,
299 UMPM_UART1_PORT + port->port_number,
300 data, size, TI_VSEND_TIMEOUT_DEFAULT);
301 }
302
303 /* clear tx/rx buffers and fifo in TI UMP */
purge_port(struct usb_serial_port * port,u16 mask)304 static int purge_port(struct usb_serial_port *port, u16 mask)
305 {
306 int port_number = port->port_number;
307
308 dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
309
310 return send_port_cmd(port, UMPC_PURGE_PORT, mask, NULL, 0);
311 }
312
313 /**
314 * read_download_mem - Read edgeport memory from TI chip
315 * @dev: usb device pointer
316 * @start_address: Device CPU address at which to read
317 * @length: Length of above data
318 * @address_type: Can read both XDATA and I2C
319 * @buffer: pointer to input data buffer
320 */
read_download_mem(struct usb_device * dev,int start_address,int length,u8 address_type,u8 * buffer)321 static int read_download_mem(struct usb_device *dev, int start_address,
322 int length, u8 address_type, u8 *buffer)
323 {
324 int status = 0;
325 u8 read_length;
326 u16 be_start_address;
327
328 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
329
330 /*
331 * Read in blocks of 64 bytes
332 * (TI firmware can't handle more than 64 byte reads)
333 */
334 while (length) {
335 if (length > 64)
336 read_length = 64;
337 else
338 read_length = (u8)length;
339
340 if (read_length > 1) {
341 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
342 }
343 /*
344 * NOTE: Must use swab as wIndex is sent in little-endian
345 * byte order regardless of host byte order.
346 */
347 be_start_address = swab16((u16)start_address);
348 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
349 (u16)address_type,
350 be_start_address,
351 buffer, read_length);
352
353 if (status) {
354 dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
355 return status;
356 }
357
358 if (read_length > 1)
359 usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
360
361 /* Update pointers/length */
362 start_address += read_length;
363 buffer += read_length;
364 length -= read_length;
365 }
366
367 return status;
368 }
369
read_ram(struct usb_device * dev,int start_address,int length,u8 * buffer)370 static int read_ram(struct usb_device *dev, int start_address,
371 int length, u8 *buffer)
372 {
373 return read_download_mem(dev, start_address, length,
374 DTK_ADDR_SPACE_XDATA, buffer);
375 }
376
377 /* Read edgeport memory to a given block */
read_boot_mem(struct edgeport_serial * serial,int start_address,int length,u8 * buffer)378 static int read_boot_mem(struct edgeport_serial *serial,
379 int start_address, int length, u8 *buffer)
380 {
381 int status = 0;
382 int i;
383
384 for (i = 0; i < length; i++) {
385 status = ti_vread_sync(serial->serial->dev,
386 UMPC_MEMORY_READ, serial->TI_I2C_Type,
387 (u16)(start_address+i), &buffer[i], 0x01);
388 if (status) {
389 dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
390 return status;
391 }
392 }
393
394 dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
395 __func__, start_address, length);
396 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
397
398 serial->TiReadI2C = 1;
399
400 return status;
401 }
402
403 /* Write given block to TI EPROM memory */
write_boot_mem(struct edgeport_serial * serial,int start_address,int length,u8 * buffer)404 static int write_boot_mem(struct edgeport_serial *serial,
405 int start_address, int length, u8 *buffer)
406 {
407 int status = 0;
408 int i;
409 u8 *temp;
410
411 /* Must do a read before write */
412 if (!serial->TiReadI2C) {
413 temp = kmalloc(1, GFP_KERNEL);
414 if (!temp)
415 return -ENOMEM;
416
417 status = read_boot_mem(serial, 0, 1, temp);
418 kfree(temp);
419 if (status)
420 return status;
421 }
422
423 for (i = 0; i < length; ++i) {
424 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
425 buffer[i], (u16)(i + start_address), NULL,
426 0, TI_VSEND_TIMEOUT_DEFAULT);
427 if (status)
428 return status;
429 }
430
431 dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
432 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
433
434 return status;
435 }
436
437 /* Write edgeport I2C memory to TI chip */
write_i2c_mem(struct edgeport_serial * serial,int start_address,int length,u8 address_type,u8 * buffer)438 static int write_i2c_mem(struct edgeport_serial *serial,
439 int start_address, int length, u8 address_type, u8 *buffer)
440 {
441 struct device *dev = &serial->serial->dev->dev;
442 int status = 0;
443 int write_length;
444 u16 be_start_address;
445
446 /* We can only send a maximum of 1 aligned byte page at a time */
447
448 /* calculate the number of bytes left in the first page */
449 write_length = EPROM_PAGE_SIZE -
450 (start_address & (EPROM_PAGE_SIZE - 1));
451
452 if (write_length > length)
453 write_length = length;
454
455 dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
456 __func__, start_address, write_length);
457 usb_serial_debug_data(dev, __func__, write_length, buffer);
458
459 /*
460 * Write first page.
461 *
462 * NOTE: Must use swab as wIndex is sent in little-endian byte order
463 * regardless of host byte order.
464 */
465 be_start_address = swab16((u16)start_address);
466 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
467 (u16)address_type, be_start_address,
468 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT);
469 if (status) {
470 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
471 return status;
472 }
473
474 length -= write_length;
475 start_address += write_length;
476 buffer += write_length;
477
478 /*
479 * We should be aligned now -- can write max page size bytes at a
480 * time.
481 */
482 while (length) {
483 if (length > EPROM_PAGE_SIZE)
484 write_length = EPROM_PAGE_SIZE;
485 else
486 write_length = length;
487
488 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
489 __func__, start_address, write_length);
490 usb_serial_debug_data(dev, __func__, write_length, buffer);
491
492 /*
493 * Write next page.
494 *
495 * NOTE: Must use swab as wIndex is sent in little-endian byte
496 * order regardless of host byte order.
497 */
498 be_start_address = swab16((u16)start_address);
499 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
500 (u16)address_type, be_start_address, buffer,
501 write_length, TI_VSEND_TIMEOUT_DEFAULT);
502 if (status) {
503 dev_err(dev, "%s - ERROR %d\n", __func__, status);
504 return status;
505 }
506
507 length -= write_length;
508 start_address += write_length;
509 buffer += write_length;
510 }
511 return status;
512 }
513
514 /*
515 * Examine the UMP DMA registers and LSR
516 *
517 * Check the MSBit of the X and Y DMA byte count registers.
518 * A zero in this bit indicates that the TX DMA buffers are empty
519 * then check the TX Empty bit in the UART.
520 */
tx_active(struct edgeport_port * port)521 static int tx_active(struct edgeport_port *port)
522 {
523 int status;
524 struct out_endpoint_desc_block *oedb;
525 u8 *lsr;
526 int bytes_left = 0;
527
528 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
529 if (!oedb)
530 return -ENOMEM;
531
532 /*
533 * Sigh, that's right, just one byte, as not all platforms can
534 * do DMA from stack
535 */
536 lsr = kmalloc(1, GFP_KERNEL);
537 if (!lsr) {
538 kfree(oedb);
539 return -ENOMEM;
540 }
541 /* Read the DMA Count Registers */
542 status = read_ram(port->port->serial->dev, port->dma_address,
543 sizeof(*oedb), (void *)oedb);
544 if (status)
545 goto exit_is_tx_active;
546
547 dev_dbg(&port->port->dev, "%s - XByteCount 0x%X\n", __func__, oedb->XByteCount);
548
549 /* and the LSR */
550 status = read_ram(port->port->serial->dev,
551 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
552
553 if (status)
554 goto exit_is_tx_active;
555 dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
556
557 /* If either buffer has data or we are transmitting then return TRUE */
558 if ((oedb->XByteCount & 0x80) != 0)
559 bytes_left += 64;
560
561 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
562 bytes_left += 1;
563
564 /* We return Not Active if we get any kind of error */
565 exit_is_tx_active:
566 dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
567
568 kfree(lsr);
569 kfree(oedb);
570 return bytes_left;
571 }
572
choose_config(struct usb_device * dev)573 static int choose_config(struct usb_device *dev)
574 {
575 /*
576 * There may be multiple configurations on this device, in which case
577 * we would need to read and parse all of them to find out which one
578 * we want. However, we just support one config at this point,
579 * configuration # 1, which is Config Descriptor 0.
580 */
581
582 dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
583 __func__, dev->config->desc.bNumInterfaces);
584 dev_dbg(&dev->dev, "%s - MAX Power = %d\n",
585 __func__, dev->config->desc.bMaxPower * 2);
586
587 if (dev->config->desc.bNumInterfaces != 1) {
588 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
589 return -ENODEV;
590 }
591
592 return 0;
593 }
594
read_rom(struct edgeport_serial * serial,int start_address,int length,u8 * buffer)595 static int read_rom(struct edgeport_serial *serial,
596 int start_address, int length, u8 *buffer)
597 {
598 int status;
599
600 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
601 status = read_download_mem(serial->serial->dev,
602 start_address,
603 length,
604 serial->TI_I2C_Type,
605 buffer);
606 } else {
607 status = read_boot_mem(serial, start_address, length,
608 buffer);
609 }
610 return status;
611 }
612
write_rom(struct edgeport_serial * serial,int start_address,int length,u8 * buffer)613 static int write_rom(struct edgeport_serial *serial, int start_address,
614 int length, u8 *buffer)
615 {
616 if (serial->product_info.TiMode == TI_MODE_BOOT)
617 return write_boot_mem(serial, start_address, length,
618 buffer);
619
620 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
621 return write_i2c_mem(serial, start_address, length,
622 serial->TI_I2C_Type, buffer);
623 return -EINVAL;
624 }
625
626 /* Read a descriptor header from I2C based on type */
get_descriptor_addr(struct edgeport_serial * serial,int desc_type,struct ti_i2c_desc * rom_desc)627 static int get_descriptor_addr(struct edgeport_serial *serial,
628 int desc_type, struct ti_i2c_desc *rom_desc)
629 {
630 int start_address;
631 int status;
632
633 /* Search for requested descriptor in I2C */
634 start_address = 2;
635 do {
636 status = read_rom(serial,
637 start_address,
638 sizeof(struct ti_i2c_desc),
639 (u8 *)rom_desc);
640 if (status)
641 return 0;
642
643 if (rom_desc->Type == desc_type)
644 return start_address;
645
646 start_address = start_address + sizeof(struct ti_i2c_desc) +
647 le16_to_cpu(rom_desc->Size);
648
649 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
650
651 return 0;
652 }
653
654 /* Validate descriptor checksum */
valid_csum(struct ti_i2c_desc * rom_desc,u8 * buffer)655 static int valid_csum(struct ti_i2c_desc *rom_desc, u8 *buffer)
656 {
657 u16 i;
658 u8 cs = 0;
659
660 for (i = 0; i < le16_to_cpu(rom_desc->Size); i++)
661 cs = (u8)(cs + buffer[i]);
662
663 if (cs != rom_desc->CheckSum) {
664 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
665 return -EINVAL;
666 }
667 return 0;
668 }
669
670 /* Make sure that the I2C image is good */
check_i2c_image(struct edgeport_serial * serial)671 static int check_i2c_image(struct edgeport_serial *serial)
672 {
673 struct device *dev = &serial->serial->dev->dev;
674 int status = 0;
675 struct ti_i2c_desc *rom_desc;
676 int start_address = 2;
677 u8 *buffer;
678 u16 ttype;
679
680 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
681 if (!rom_desc)
682 return -ENOMEM;
683
684 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
685 if (!buffer) {
686 kfree(rom_desc);
687 return -ENOMEM;
688 }
689
690 /* Read the first byte (Signature0) must be 0x52 or 0x10 */
691 status = read_rom(serial, 0, 1, buffer);
692 if (status)
693 goto out;
694
695 if (*buffer != UMP5152 && *buffer != UMP3410) {
696 dev_err(dev, "%s - invalid buffer signature\n", __func__);
697 status = -ENODEV;
698 goto out;
699 }
700
701 do {
702 /* Validate the I2C */
703 status = read_rom(serial,
704 start_address,
705 sizeof(struct ti_i2c_desc),
706 (u8 *)rom_desc);
707 if (status)
708 break;
709
710 if ((start_address + sizeof(struct ti_i2c_desc) +
711 le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) {
712 status = -ENODEV;
713 dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
714 break;
715 }
716
717 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
718
719 /* Skip type 2 record */
720 ttype = rom_desc->Type & 0x0f;
721 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
722 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
723 /* Read the descriptor data */
724 status = read_rom(serial, start_address +
725 sizeof(struct ti_i2c_desc),
726 le16_to_cpu(rom_desc->Size),
727 buffer);
728 if (status)
729 break;
730
731 status = valid_csum(rom_desc, buffer);
732 if (status)
733 break;
734 }
735 start_address = start_address + sizeof(struct ti_i2c_desc) +
736 le16_to_cpu(rom_desc->Size);
737
738 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
739 (start_address < TI_MAX_I2C_SIZE));
740
741 if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
742 (start_address > TI_MAX_I2C_SIZE))
743 status = -ENODEV;
744
745 out:
746 kfree(buffer);
747 kfree(rom_desc);
748 return status;
749 }
750
get_manuf_info(struct edgeport_serial * serial,u8 * buffer)751 static int get_manuf_info(struct edgeport_serial *serial, u8 *buffer)
752 {
753 int status;
754 int start_address;
755 struct ti_i2c_desc *rom_desc;
756 struct edge_ti_manuf_descriptor *desc;
757 struct device *dev = &serial->serial->dev->dev;
758
759 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
760 if (!rom_desc)
761 return -ENOMEM;
762
763 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
764 rom_desc);
765
766 if (!start_address) {
767 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
768 status = -ENODEV;
769 goto exit;
770 }
771
772 /* Read the descriptor data */
773 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
774 le16_to_cpu(rom_desc->Size), buffer);
775 if (status)
776 goto exit;
777
778 status = valid_csum(rom_desc, buffer);
779
780 desc = (struct edge_ti_manuf_descriptor *)buffer;
781 dev_dbg(dev, "%s - IonConfig 0x%x\n", __func__, desc->IonConfig);
782 dev_dbg(dev, "%s - Version %d\n", __func__, desc->Version);
783 dev_dbg(dev, "%s - Cpu/Board 0x%x\n", __func__, desc->CpuRev_BoardRev);
784 dev_dbg(dev, "%s - NumPorts %d\n", __func__, desc->NumPorts);
785 dev_dbg(dev, "%s - NumVirtualPorts %d\n", __func__, desc->NumVirtualPorts);
786 dev_dbg(dev, "%s - TotalPorts %d\n", __func__, desc->TotalPorts);
787
788 exit:
789 kfree(rom_desc);
790 return status;
791 }
792
793 /* Build firmware header used for firmware update */
build_i2c_fw_hdr(u8 * header,const struct firmware * fw)794 static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw)
795 {
796 u8 *buffer;
797 int buffer_size;
798 int i;
799 u8 cs = 0;
800 struct ti_i2c_desc *i2c_header;
801 struct ti_i2c_image_header *img_header;
802 struct ti_i2c_firmware_rec *firmware_rec;
803 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
804
805 /*
806 * In order to update the I2C firmware we must change the type 2 record
807 * to type 0xF2. This will force the UMP to come up in Boot Mode.
808 * Then while in boot mode, the driver will download the latest
809 * firmware (padded to 15.5k) into the UMP ram. And finally when the
810 * device comes back up in download mode the driver will cause the new
811 * firmware to be copied from the UMP Ram to I2C and the firmware will
812 * update the record type from 0xf2 to 0x02.
813 */
814
815 /*
816 * Allocate a 15.5k buffer + 2 bytes for version number (Firmware
817 * Record)
818 */
819 buffer_size = (((1024 * 16) - 512 ) +
820 sizeof(struct ti_i2c_firmware_rec));
821
822 buffer = kmalloc(buffer_size, GFP_KERNEL);
823 if (!buffer)
824 return -ENOMEM;
825
826 /* Set entire image of 0xffs */
827 memset(buffer, 0xff, buffer_size);
828
829 /* Copy version number into firmware record */
830 firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
831
832 firmware_rec->Ver_Major = fw_hdr->major_version;
833 firmware_rec->Ver_Minor = fw_hdr->minor_version;
834
835 /* Pointer to fw_down memory image */
836 img_header = (struct ti_i2c_image_header *)&fw->data[4];
837
838 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
839 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
840 le16_to_cpu(img_header->Length));
841
842 for (i=0; i < buffer_size; i++) {
843 cs = (u8)(cs + buffer[i]);
844 }
845
846 kfree(buffer);
847
848 /* Build new header */
849 i2c_header = (struct ti_i2c_desc *)header;
850 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data;
851
852 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK;
853 i2c_header->Size = cpu_to_le16(buffer_size);
854 i2c_header->CheckSum = cs;
855 firmware_rec->Ver_Major = fw_hdr->major_version;
856 firmware_rec->Ver_Minor = fw_hdr->minor_version;
857
858 return 0;
859 }
860
861 /* Try to figure out what type of I2c we have */
i2c_type_bootmode(struct edgeport_serial * serial)862 static int i2c_type_bootmode(struct edgeport_serial *serial)
863 {
864 struct device *dev = &serial->serial->dev->dev;
865 int status;
866 u8 *data;
867
868 data = kmalloc(1, GFP_KERNEL);
869 if (!data)
870 return -ENOMEM;
871
872 /* Try to read type 2 */
873 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
874 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
875 if (status)
876 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
877 else
878 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
879 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
880 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
881 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
882 goto out;
883 }
884
885 /* Try to read type 3 */
886 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
887 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
888 if (status)
889 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
890 else
891 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
892 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
893 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
894 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
895 goto out;
896 }
897
898 dev_dbg(dev, "%s - Unknown\n", __func__);
899 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
900 status = -ENODEV;
901 out:
902 kfree(data);
903 return status;
904 }
905
bulk_xfer(struct usb_serial * serial,void * buffer,int length,int * num_sent)906 static int bulk_xfer(struct usb_serial *serial, void *buffer,
907 int length, int *num_sent)
908 {
909 int status;
910
911 status = usb_bulk_msg(serial->dev,
912 usb_sndbulkpipe(serial->dev,
913 serial->port[0]->bulk_out_endpointAddress),
914 buffer, length, num_sent, 1000);
915 return status;
916 }
917
918 /* Download given firmware image to the device (IN BOOT MODE) */
download_code(struct edgeport_serial * serial,u8 * image,int image_length)919 static int download_code(struct edgeport_serial *serial, u8 *image,
920 int image_length)
921 {
922 int status = 0;
923 int pos;
924 int transfer;
925 int done;
926
927 /* Transfer firmware image */
928 for (pos = 0; pos < image_length; ) {
929 /* Read the next buffer from file */
930 transfer = image_length - pos;
931 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
932 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
933
934 /* Transfer data */
935 status = bulk_xfer(serial->serial, &image[pos],
936 transfer, &done);
937 if (status)
938 break;
939 /* Advance buffer pointer */
940 pos += done;
941 }
942
943 return status;
944 }
945
946 /* FIXME!!! */
config_boot_dev(struct usb_device * dev)947 static int config_boot_dev(struct usb_device *dev)
948 {
949 return 0;
950 }
951
ti_cpu_rev(struct edge_ti_manuf_descriptor * desc)952 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
953 {
954 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
955 }
956
check_fw_sanity(struct edgeport_serial * serial,const struct firmware * fw)957 static int check_fw_sanity(struct edgeport_serial *serial,
958 const struct firmware *fw)
959 {
960 u16 length_total;
961 u8 checksum = 0;
962 int pos;
963 struct device *dev = &serial->serial->interface->dev;
964 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
965
966 if (fw->size < sizeof(struct edgeport_fw_hdr)) {
967 dev_err(dev, "incomplete fw header\n");
968 return -EINVAL;
969 }
970
971 length_total = le16_to_cpu(fw_hdr->length) +
972 sizeof(struct edgeport_fw_hdr);
973
974 if (fw->size != length_total) {
975 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n",
976 length_total, fw->size);
977 return -EINVAL;
978 }
979
980 for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos)
981 checksum += fw->data[pos];
982
983 if (checksum != fw_hdr->checksum) {
984 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n",
985 fw_hdr->checksum, checksum);
986 return -EINVAL;
987 }
988
989 return 0;
990 }
991
992 /*
993 * DownloadTIFirmware - Download run-time operating firmware to the TI5052
994 *
995 * This routine downloads the main operating code into the TI5052, using the
996 * boot code already burned into E2PROM or ROM.
997 */
download_fw(struct edgeport_serial * serial)998 static int download_fw(struct edgeport_serial *serial)
999 {
1000 struct device *dev = &serial->serial->interface->dev;
1001 int status = 0;
1002 struct usb_interface_descriptor *interface;
1003 const struct firmware *fw;
1004 const char *fw_name = "edgeport/down3.bin";
1005 struct edgeport_fw_hdr *fw_hdr;
1006
1007 status = request_firmware(&fw, fw_name, dev);
1008 if (status) {
1009 dev_err(dev, "Failed to load image \"%s\" err %d\n",
1010 fw_name, status);
1011 return status;
1012 }
1013
1014 if (check_fw_sanity(serial, fw)) {
1015 status = -EINVAL;
1016 goto out;
1017 }
1018
1019 fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1020
1021 /* If on-board version is newer, "fw_version" will be updated later. */
1022 serial->fw_version = (fw_hdr->major_version << 8) +
1023 fw_hdr->minor_version;
1024
1025 /*
1026 * This routine is entered by both the BOOT mode and the Download mode
1027 * We can determine which code is running by the reading the config
1028 * descriptor and if we have only one bulk pipe it is in boot mode
1029 */
1030 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1031
1032 /* Default to type 2 i2c */
1033 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1034
1035 status = choose_config(serial->serial->dev);
1036 if (status)
1037 goto out;
1038
1039 interface = &serial->serial->interface->cur_altsetting->desc;
1040 if (!interface) {
1041 dev_err(dev, "%s - no interface set, error!\n", __func__);
1042 status = -ENODEV;
1043 goto out;
1044 }
1045
1046 /*
1047 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1048 * if we have more than one endpoint we are definitely in download
1049 * mode
1050 */
1051 if (interface->bNumEndpoints > 1) {
1052 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1053 status = do_download_mode(serial, fw);
1054 } else {
1055 /* Otherwise we will remain in configuring mode */
1056 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1057 status = do_boot_mode(serial, fw);
1058 }
1059
1060 out:
1061 release_firmware(fw);
1062 return status;
1063 }
1064
do_download_mode(struct edgeport_serial * serial,const struct firmware * fw)1065 static int do_download_mode(struct edgeport_serial *serial,
1066 const struct firmware *fw)
1067 {
1068 struct device *dev = &serial->serial->interface->dev;
1069 int status = 0;
1070 int start_address;
1071 struct edge_ti_manuf_descriptor *ti_manuf_desc;
1072 int download_cur_ver;
1073 int download_new_ver;
1074 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1075 struct ti_i2c_desc *rom_desc;
1076
1077 dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
1078
1079 status = check_i2c_image(serial);
1080 if (status) {
1081 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
1082 return status;
1083 }
1084
1085 /*
1086 * Validate Hardware version number
1087 * Read Manufacturing Descriptor from TI Based Edgeport
1088 */
1089 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1090 if (!ti_manuf_desc)
1091 return -ENOMEM;
1092
1093 status = get_manuf_info(serial, (u8 *)ti_manuf_desc);
1094 if (status) {
1095 kfree(ti_manuf_desc);
1096 return status;
1097 }
1098
1099 /* Check version number of ION descriptor */
1100 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1101 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1102 __func__, ti_cpu_rev(ti_manuf_desc));
1103 kfree(ti_manuf_desc);
1104 return -EINVAL;
1105 }
1106
1107 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1108 if (!rom_desc) {
1109 kfree(ti_manuf_desc);
1110 return -ENOMEM;
1111 }
1112
1113 /* Search for type 2 record (firmware record) */
1114 start_address = get_descriptor_addr(serial,
1115 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1116 if (start_address != 0) {
1117 struct ti_i2c_firmware_rec *firmware_version;
1118 u8 *record;
1119
1120 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n",
1121 __func__);
1122
1123 firmware_version = kmalloc(sizeof(*firmware_version),
1124 GFP_KERNEL);
1125 if (!firmware_version) {
1126 kfree(rom_desc);
1127 kfree(ti_manuf_desc);
1128 return -ENOMEM;
1129 }
1130
1131 /*
1132 * Validate version number
1133 * Read the descriptor data
1134 */
1135 status = read_rom(serial, start_address +
1136 sizeof(struct ti_i2c_desc),
1137 sizeof(struct ti_i2c_firmware_rec),
1138 (u8 *)firmware_version);
1139 if (status) {
1140 kfree(firmware_version);
1141 kfree(rom_desc);
1142 kfree(ti_manuf_desc);
1143 return status;
1144 }
1145
1146 /*
1147 * Check version number of download with current
1148 * version in I2c
1149 */
1150 download_cur_ver = (firmware_version->Ver_Major << 8) +
1151 (firmware_version->Ver_Minor);
1152 download_new_ver = (fw_hdr->major_version << 8) +
1153 (fw_hdr->minor_version);
1154
1155 dev_dbg(dev, "%s - >> FW Versions Device %d.%d Driver %d.%d\n",
1156 __func__, firmware_version->Ver_Major,
1157 firmware_version->Ver_Minor,
1158 fw_hdr->major_version, fw_hdr->minor_version);
1159
1160 /*
1161 * Check if we have an old version in the I2C and
1162 * update if necessary
1163 */
1164 if (download_cur_ver < download_new_ver) {
1165 dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1166 __func__,
1167 firmware_version->Ver_Major,
1168 firmware_version->Ver_Minor,
1169 fw_hdr->major_version,
1170 fw_hdr->minor_version);
1171
1172 record = kmalloc(1, GFP_KERNEL);
1173 if (!record) {
1174 kfree(firmware_version);
1175 kfree(rom_desc);
1176 kfree(ti_manuf_desc);
1177 return -ENOMEM;
1178 }
1179 /*
1180 * In order to update the I2C firmware we must
1181 * change the type 2 record to type 0xF2. This
1182 * will force the UMP to come up in Boot Mode.
1183 * Then while in boot mode, the driver will
1184 * download the latest firmware (padded to
1185 * 15.5k) into the UMP ram. Finally when the
1186 * device comes back up in download mode the
1187 * driver will cause the new firmware to be
1188 * copied from the UMP Ram to I2C and the
1189 * firmware will update the record type from
1190 * 0xf2 to 0x02.
1191 */
1192 *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1193
1194 /*
1195 * Change the I2C Firmware record type to
1196 * 0xf2 to trigger an update
1197 */
1198 status = write_rom(serial, start_address,
1199 sizeof(*record), record);
1200 if (status) {
1201 kfree(record);
1202 kfree(firmware_version);
1203 kfree(rom_desc);
1204 kfree(ti_manuf_desc);
1205 return status;
1206 }
1207
1208 /*
1209 * verify the write -- must do this in order
1210 * for write to complete before we do the
1211 * hardware reset
1212 */
1213 status = read_rom(serial,
1214 start_address,
1215 sizeof(*record),
1216 record);
1217 if (status) {
1218 kfree(record);
1219 kfree(firmware_version);
1220 kfree(rom_desc);
1221 kfree(ti_manuf_desc);
1222 return status;
1223 }
1224
1225 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1226 dev_err(dev, "%s - error resetting device\n",
1227 __func__);
1228 kfree(record);
1229 kfree(firmware_version);
1230 kfree(rom_desc);
1231 kfree(ti_manuf_desc);
1232 return -ENODEV;
1233 }
1234
1235 dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1236
1237 /* Reset UMP -- Back to BOOT MODE */
1238 status = ti_vsend_sync(serial->serial->dev,
1239 UMPC_HARDWARE_RESET,
1240 0, 0, NULL, 0,
1241 TI_VSEND_TIMEOUT_DEFAULT);
1242
1243 dev_dbg(dev, "%s - HARDWARE RESET return %d\n",
1244 __func__, status);
1245
1246 /* return an error on purpose. */
1247 kfree(record);
1248 kfree(firmware_version);
1249 kfree(rom_desc);
1250 kfree(ti_manuf_desc);
1251 return -ENODEV;
1252 }
1253 /* Same or newer fw version is already loaded */
1254 serial->fw_version = download_cur_ver;
1255 kfree(firmware_version);
1256 }
1257 /* Search for type 0xF2 record (firmware blank record) */
1258 else {
1259 start_address = get_descriptor_addr(serial,
1260 I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc);
1261 if (start_address != 0) {
1262 #define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \
1263 sizeof(struct ti_i2c_firmware_rec))
1264 u8 *header;
1265 u8 *vheader;
1266
1267 header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1268 if (!header) {
1269 kfree(rom_desc);
1270 kfree(ti_manuf_desc);
1271 return -ENOMEM;
1272 }
1273
1274 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1275 if (!vheader) {
1276 kfree(header);
1277 kfree(rom_desc);
1278 kfree(ti_manuf_desc);
1279 return -ENOMEM;
1280 }
1281
1282 dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n",
1283 __func__);
1284
1285 /*
1286 * In order to update the I2C firmware we must change
1287 * the type 2 record to type 0xF2. This will force the
1288 * UMP to come up in Boot Mode. Then while in boot
1289 * mode, the driver will download the latest firmware
1290 * (padded to 15.5k) into the UMP ram. Finally when the
1291 * device comes back up in download mode the driver
1292 * will cause the new firmware to be copied from the
1293 * UMP Ram to I2C and the firmware will update the
1294 * record type from 0xf2 to 0x02.
1295 */
1296 status = build_i2c_fw_hdr(header, fw);
1297 if (status) {
1298 kfree(vheader);
1299 kfree(header);
1300 kfree(rom_desc);
1301 kfree(ti_manuf_desc);
1302 return -EINVAL;
1303 }
1304
1305 /*
1306 * Update I2C with type 0xf2 record with correct
1307 * size and checksum
1308 */
1309 status = write_rom(serial,
1310 start_address,
1311 HEADER_SIZE,
1312 header);
1313 if (status) {
1314 kfree(vheader);
1315 kfree(header);
1316 kfree(rom_desc);
1317 kfree(ti_manuf_desc);
1318 return -EINVAL;
1319 }
1320
1321 /*
1322 * verify the write -- must do this in order for
1323 * write to complete before we do the hardware reset
1324 */
1325 status = read_rom(serial, start_address,
1326 HEADER_SIZE, vheader);
1327
1328 if (status) {
1329 dev_dbg(dev, "%s - can't read header back\n",
1330 __func__);
1331 kfree(vheader);
1332 kfree(header);
1333 kfree(rom_desc);
1334 kfree(ti_manuf_desc);
1335 return status;
1336 }
1337 if (memcmp(vheader, header, HEADER_SIZE)) {
1338 dev_dbg(dev, "%s - write download record failed\n",
1339 __func__);
1340 kfree(vheader);
1341 kfree(header);
1342 kfree(rom_desc);
1343 kfree(ti_manuf_desc);
1344 return -EINVAL;
1345 }
1346
1347 kfree(vheader);
1348 kfree(header);
1349
1350 dev_dbg(dev, "%s - Start firmware update\n", __func__);
1351
1352 /* Tell firmware to copy download image into I2C */
1353 status = ti_vsend_sync(serial->serial->dev,
1354 UMPC_COPY_DNLD_TO_I2C,
1355 0, 0, NULL, 0,
1356 TI_VSEND_TIMEOUT_FW_DOWNLOAD);
1357
1358 dev_dbg(dev, "%s - Update complete 0x%x\n", __func__,
1359 status);
1360 if (status) {
1361 dev_err(dev,
1362 "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1363 __func__);
1364 kfree(rom_desc);
1365 kfree(ti_manuf_desc);
1366 return status;
1367 }
1368 }
1369 }
1370
1371 /* The device is running the download code */
1372 kfree(rom_desc);
1373 kfree(ti_manuf_desc);
1374 return 0;
1375 }
1376
do_boot_mode(struct edgeport_serial * serial,const struct firmware * fw)1377 static int do_boot_mode(struct edgeport_serial *serial,
1378 const struct firmware *fw)
1379 {
1380 struct device *dev = &serial->serial->interface->dev;
1381 int status = 0;
1382 struct edge_ti_manuf_descriptor *ti_manuf_desc;
1383 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1384
1385 dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1386
1387 /* Configure the TI device so we can use the BULK pipes for download */
1388 status = config_boot_dev(serial->serial->dev);
1389 if (status)
1390 return status;
1391
1392 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1393 != USB_VENDOR_ID_ION) {
1394 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1395 le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1396 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1397 goto stayinbootmode;
1398 }
1399
1400 /*
1401 * We have an ION device (I2c Must be programmed)
1402 * Determine I2C image type
1403 */
1404 if (i2c_type_bootmode(serial))
1405 goto stayinbootmode;
1406
1407 /* Check for ION Vendor ID and that the I2C is valid */
1408 if (!check_i2c_image(serial)) {
1409 struct ti_i2c_image_header *header;
1410 int i;
1411 u8 cs = 0;
1412 u8 *buffer;
1413 int buffer_size;
1414
1415 /*
1416 * Validate Hardware version number
1417 * Read Manufacturing Descriptor from TI Based Edgeport
1418 */
1419 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1420 if (!ti_manuf_desc)
1421 return -ENOMEM;
1422
1423 status = get_manuf_info(serial, (u8 *)ti_manuf_desc);
1424 if (status) {
1425 kfree(ti_manuf_desc);
1426 goto stayinbootmode;
1427 }
1428
1429 /* Check for version 2 */
1430 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1431 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1432 __func__, ti_cpu_rev(ti_manuf_desc));
1433 kfree(ti_manuf_desc);
1434 goto stayinbootmode;
1435 }
1436
1437 kfree(ti_manuf_desc);
1438
1439 /*
1440 * In order to update the I2C firmware we must change the type
1441 * 2 record to type 0xF2. This will force the UMP to come up
1442 * in Boot Mode. Then while in boot mode, the driver will
1443 * download the latest firmware (padded to 15.5k) into the
1444 * UMP ram. Finally when the device comes back up in download
1445 * mode the driver will cause the new firmware to be copied
1446 * from the UMP Ram to I2C and the firmware will update the
1447 * record type from 0xf2 to 0x02.
1448 *
1449 * Do we really have to copy the whole firmware image,
1450 * or could we do this in place!
1451 */
1452
1453 /* Allocate a 15.5k buffer + 3 byte header */
1454 buffer_size = (((1024 * 16) - 512) +
1455 sizeof(struct ti_i2c_image_header));
1456 buffer = kmalloc(buffer_size, GFP_KERNEL);
1457 if (!buffer)
1458 return -ENOMEM;
1459
1460 /* Initialize the buffer to 0xff (pad the buffer) */
1461 memset(buffer, 0xff, buffer_size);
1462 memcpy(buffer, &fw->data[4], fw->size - 4);
1463
1464 for (i = sizeof(struct ti_i2c_image_header);
1465 i < buffer_size; i++) {
1466 cs = (u8)(cs + buffer[i]);
1467 }
1468
1469 header = (struct ti_i2c_image_header *)buffer;
1470
1471 /* update length and checksum after padding */
1472 header->Length = cpu_to_le16((u16)(buffer_size -
1473 sizeof(struct ti_i2c_image_header)));
1474 header->CheckSum = cs;
1475
1476 /* Download the operational code */
1477 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
1478 __func__,
1479 fw_hdr->major_version, fw_hdr->minor_version);
1480 status = download_code(serial, buffer, buffer_size);
1481
1482 kfree(buffer);
1483
1484 if (status) {
1485 dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1486 return status;
1487 }
1488
1489 /* Device will reboot */
1490 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1491
1492 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1493
1494 return 1;
1495 }
1496
1497 stayinbootmode:
1498 /* Eprom is invalid or blank stay in boot mode */
1499 dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1500 serial->product_info.TiMode = TI_MODE_BOOT;
1501
1502 return 1;
1503 }
1504
ti_do_config(struct edgeport_port * port,int feature,int on)1505 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1506 {
1507 on = !!on; /* 1 or 0 not bitmask */
1508
1509 return send_port_cmd(port->port, feature, on, NULL, 0);
1510 }
1511
restore_mcr(struct edgeport_port * port,u8 mcr)1512 static int restore_mcr(struct edgeport_port *port, u8 mcr)
1513 {
1514 int status = 0;
1515
1516 dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1517
1518 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1519 if (status)
1520 return status;
1521 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1522 if (status)
1523 return status;
1524 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1525 }
1526
1527 /* Convert TI LSR to standard UART flags */
map_line_status(u8 ti_lsr)1528 static u8 map_line_status(u8 ti_lsr)
1529 {
1530 u8 lsr = 0;
1531
1532 #define MAP_FLAG(flagUmp, flagUart) \
1533 if (ti_lsr & flagUmp) \
1534 lsr |= flagUart;
1535
1536 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */
1537 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */
1538 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */
1539 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */
1540 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */
1541 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */
1542
1543 #undef MAP_FLAG
1544
1545 return lsr;
1546 }
1547
handle_new_msr(struct edgeport_port * edge_port,u8 msr)1548 static void handle_new_msr(struct edgeport_port *edge_port, u8 msr)
1549 {
1550 struct async_icount *icount;
1551 struct tty_struct *tty;
1552
1553 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1554
1555 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1556 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1557 icount = &edge_port->port->icount;
1558
1559 /* update input line counters */
1560 if (msr & EDGEPORT_MSR_DELTA_CTS)
1561 icount->cts++;
1562 if (msr & EDGEPORT_MSR_DELTA_DSR)
1563 icount->dsr++;
1564 if (msr & EDGEPORT_MSR_DELTA_CD)
1565 icount->dcd++;
1566 if (msr & EDGEPORT_MSR_DELTA_RI)
1567 icount->rng++;
1568 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1569 }
1570
1571 /* Save the new modem status */
1572 edge_port->shadow_msr = msr & 0xf0;
1573
1574 tty = tty_port_tty_get(&edge_port->port->port);
1575 /* handle CTS flow control */
1576 if (tty && C_CRTSCTS(tty)) {
1577 if (msr & EDGEPORT_MSR_CTS)
1578 tty_wakeup(tty);
1579 }
1580 tty_kref_put(tty);
1581 }
1582
handle_new_lsr(struct edgeport_port * edge_port,int lsr_data,u8 lsr,u8 data)1583 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1584 u8 lsr, u8 data)
1585 {
1586 struct async_icount *icount;
1587 u8 new_lsr = (u8)(lsr & (u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1588 LSR_FRM_ERR | LSR_BREAK));
1589
1590 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1591
1592 edge_port->shadow_lsr = lsr;
1593
1594 if (new_lsr & LSR_BREAK)
1595 /*
1596 * Parity and Framing errors only count if they
1597 * occur exclusive of a break being received.
1598 */
1599 new_lsr &= (u8)(LSR_OVER_ERR | LSR_BREAK);
1600
1601 /* Place LSR data byte into Rx buffer */
1602 if (lsr_data)
1603 edge_tty_recv(edge_port->port, &data, 1);
1604
1605 /* update input line counters */
1606 icount = &edge_port->port->icount;
1607 if (new_lsr & LSR_BREAK)
1608 icount->brk++;
1609 if (new_lsr & LSR_OVER_ERR)
1610 icount->overrun++;
1611 if (new_lsr & LSR_PAR_ERR)
1612 icount->parity++;
1613 if (new_lsr & LSR_FRM_ERR)
1614 icount->frame++;
1615 }
1616
edge_interrupt_callback(struct urb * urb)1617 static void edge_interrupt_callback(struct urb *urb)
1618 {
1619 struct edgeport_serial *edge_serial = urb->context;
1620 struct usb_serial_port *port;
1621 struct edgeport_port *edge_port;
1622 struct device *dev;
1623 unsigned char *data = urb->transfer_buffer;
1624 int length = urb->actual_length;
1625 int port_number;
1626 int function;
1627 int retval;
1628 u8 lsr;
1629 u8 msr;
1630 int status = urb->status;
1631
1632 switch (status) {
1633 case 0:
1634 /* success */
1635 break;
1636 case -ECONNRESET:
1637 case -ENOENT:
1638 case -ESHUTDOWN:
1639 /* this urb is terminated, clean up */
1640 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1641 __func__, status);
1642 return;
1643 default:
1644 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1645 "%d\n", __func__, status);
1646 goto exit;
1647 }
1648
1649 if (!length) {
1650 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1651 goto exit;
1652 }
1653
1654 dev = &edge_serial->serial->dev->dev;
1655 usb_serial_debug_data(dev, __func__, length, data);
1656
1657 if (length != 2) {
1658 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1659 goto exit;
1660 }
1661
1662 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1663 function = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1664 dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1665 port_number, function, data[1]);
1666
1667 if (port_number >= edge_serial->serial->num_ports) {
1668 dev_err(dev, "bad port number %d\n", port_number);
1669 goto exit;
1670 }
1671
1672 port = edge_serial->serial->port[port_number];
1673 edge_port = usb_get_serial_port_data(port);
1674 if (!edge_port) {
1675 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1676 return;
1677 }
1678 switch (function) {
1679 case TIUMP_INTERRUPT_CODE_LSR:
1680 lsr = map_line_status(data[1]);
1681 if (lsr & UMP_UART_LSR_DATA_MASK) {
1682 /*
1683 * Save the LSR event for bulk read completion routine
1684 */
1685 dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1686 __func__, port_number, lsr);
1687 edge_port->lsr_event = 1;
1688 edge_port->lsr_mask = lsr;
1689 } else {
1690 dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1691 __func__, port_number, lsr);
1692 handle_new_lsr(edge_port, 0, lsr, 0);
1693 }
1694 break;
1695
1696 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */
1697 /* Copy MSR from UMP */
1698 msr = data[1];
1699 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1700 __func__, port_number, msr);
1701 handle_new_msr(edge_port, msr);
1702 break;
1703
1704 default:
1705 dev_err(&urb->dev->dev,
1706 "%s - Unknown Interrupt code from UMP %x\n",
1707 __func__, data[1]);
1708 break;
1709
1710 }
1711
1712 exit:
1713 retval = usb_submit_urb(urb, GFP_ATOMIC);
1714 if (retval)
1715 dev_err(&urb->dev->dev,
1716 "%s - usb_submit_urb failed with result %d\n",
1717 __func__, retval);
1718 }
1719
edge_bulk_in_callback(struct urb * urb)1720 static void edge_bulk_in_callback(struct urb *urb)
1721 {
1722 struct edgeport_port *edge_port = urb->context;
1723 struct device *dev = &edge_port->port->dev;
1724 unsigned char *data = urb->transfer_buffer;
1725 unsigned long flags;
1726 int retval = 0;
1727 int port_number;
1728 int status = urb->status;
1729
1730 switch (status) {
1731 case 0:
1732 /* success */
1733 break;
1734 case -ECONNRESET:
1735 case -ENOENT:
1736 case -ESHUTDOWN:
1737 /* this urb is terminated, clean up */
1738 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1739 return;
1740 default:
1741 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1742 }
1743
1744 if (status == -EPIPE)
1745 goto exit;
1746
1747 if (status) {
1748 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1749 return;
1750 }
1751
1752 port_number = edge_port->port->port_number;
1753
1754 if (urb->actual_length > 0 && edge_port->lsr_event) {
1755 edge_port->lsr_event = 0;
1756 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1757 __func__, port_number, edge_port->lsr_mask, *data);
1758 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1759 /* Adjust buffer length/pointer */
1760 --urb->actual_length;
1761 ++data;
1762 }
1763
1764 if (urb->actual_length) {
1765 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1766 if (edge_port->close_pending)
1767 dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1768 __func__);
1769 else
1770 edge_tty_recv(edge_port->port, data,
1771 urb->actual_length);
1772 edge_port->port->icount.rx += urb->actual_length;
1773 }
1774
1775 exit:
1776 /* continue read unless stopped */
1777 spin_lock_irqsave(&edge_port->ep_lock, flags);
1778 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1779 retval = usb_submit_urb(urb, GFP_ATOMIC);
1780 else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1781 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1782
1783 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1784 if (retval)
1785 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1786 }
1787
edge_tty_recv(struct usb_serial_port * port,unsigned char * data,int length)1788 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1789 int length)
1790 {
1791 int queued;
1792
1793 queued = tty_insert_flip_string(&port->port, data, length);
1794 if (queued < length)
1795 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1796 __func__, length - queued);
1797 tty_flip_buffer_push(&port->port);
1798 }
1799
edge_bulk_out_callback(struct urb * urb)1800 static void edge_bulk_out_callback(struct urb *urb)
1801 {
1802 struct usb_serial_port *port = urb->context;
1803 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1804 int status = urb->status;
1805 struct tty_struct *tty;
1806
1807 edge_port->ep_write_urb_in_use = 0;
1808
1809 switch (status) {
1810 case 0:
1811 /* success */
1812 break;
1813 case -ECONNRESET:
1814 case -ENOENT:
1815 case -ESHUTDOWN:
1816 /* this urb is terminated, clean up */
1817 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1818 __func__, status);
1819 return;
1820 default:
1821 dev_err_console(port, "%s - nonzero write bulk status "
1822 "received: %d\n", __func__, status);
1823 }
1824
1825 /* send any buffered data */
1826 tty = tty_port_tty_get(&port->port);
1827 edge_send(port, tty);
1828 tty_kref_put(tty);
1829 }
1830
edge_open(struct tty_struct * tty,struct usb_serial_port * port)1831 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1832 {
1833 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1834 struct edgeport_serial *edge_serial;
1835 struct usb_device *dev;
1836 struct urb *urb;
1837 int status;
1838 u16 open_settings;
1839 u8 transaction_timeout;
1840
1841 if (edge_port == NULL)
1842 return -ENODEV;
1843
1844 dev = port->serial->dev;
1845
1846 /* turn off loopback */
1847 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1848 if (status) {
1849 dev_err(&port->dev,
1850 "%s - cannot send clear loopback command, %d\n",
1851 __func__, status);
1852 return status;
1853 }
1854
1855 /* set up the port settings */
1856 if (tty)
1857 edge_set_termios(tty, port, &tty->termios);
1858
1859 /* open up the port */
1860
1861 /* milliseconds to timeout for DMA transfer */
1862 transaction_timeout = 2;
1863
1864 edge_port->ump_read_timeout =
1865 max(20, ((transaction_timeout * 3) / 2));
1866
1867 /* milliseconds to timeout for DMA transfer */
1868 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1869 UMP_PIPE_TRANS_TIMEOUT_ENA |
1870 (transaction_timeout << 2));
1871
1872 dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1873
1874 /* Tell TI to open and start the port */
1875 status = send_port_cmd(port, UMPC_OPEN_PORT, open_settings, NULL, 0);
1876 if (status) {
1877 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1878 __func__, status);
1879 return status;
1880 }
1881
1882 /* Start the DMA? */
1883 status = send_port_cmd(port, UMPC_START_PORT, 0, NULL, 0);
1884 if (status) {
1885 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1886 __func__, status);
1887 return status;
1888 }
1889
1890 /* Clear TX and RX buffers in UMP */
1891 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1892 if (status) {
1893 dev_err(&port->dev,
1894 "%s - cannot send clear buffers command, %d\n",
1895 __func__, status);
1896 return status;
1897 }
1898
1899 /* Read Initial MSR */
1900 status = read_port_cmd(port, UMPC_READ_MSR, 0, &edge_port->shadow_msr, 1);
1901 if (status) {
1902 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1903 __func__, status);
1904 return status;
1905 }
1906
1907 dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1908
1909 /* Set Initial MCR */
1910 edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1911 dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1912
1913 edge_serial = edge_port->edge_serial;
1914 if (mutex_lock_interruptible(&edge_serial->es_lock))
1915 return -ERESTARTSYS;
1916 if (edge_serial->num_ports_open == 0) {
1917 /* we are the first port to open, post the interrupt urb */
1918 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1919 urb->context = edge_serial;
1920 status = usb_submit_urb(urb, GFP_KERNEL);
1921 if (status) {
1922 dev_err(&port->dev,
1923 "%s - usb_submit_urb failed with value %d\n",
1924 __func__, status);
1925 goto release_es_lock;
1926 }
1927 }
1928
1929 /*
1930 * reset the data toggle on the bulk endpoints to work around bug in
1931 * host controllers where things get out of sync some times
1932 */
1933 usb_clear_halt(dev, port->write_urb->pipe);
1934 usb_clear_halt(dev, port->read_urb->pipe);
1935
1936 /* start up our bulk read urb */
1937 urb = port->read_urb;
1938 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1939 urb->context = edge_port;
1940 status = usb_submit_urb(urb, GFP_KERNEL);
1941 if (status) {
1942 dev_err(&port->dev,
1943 "%s - read bulk usb_submit_urb failed with value %d\n",
1944 __func__, status);
1945 goto unlink_int_urb;
1946 }
1947
1948 ++edge_serial->num_ports_open;
1949
1950 goto release_es_lock;
1951
1952 unlink_int_urb:
1953 if (edge_port->edge_serial->num_ports_open == 0)
1954 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1955 release_es_lock:
1956 mutex_unlock(&edge_serial->es_lock);
1957 return status;
1958 }
1959
edge_close(struct usb_serial_port * port)1960 static void edge_close(struct usb_serial_port *port)
1961 {
1962 struct edgeport_serial *edge_serial;
1963 struct edgeport_port *edge_port;
1964 unsigned long flags;
1965
1966 edge_serial = usb_get_serial_data(port->serial);
1967 edge_port = usb_get_serial_port_data(port);
1968 if (edge_serial == NULL || edge_port == NULL)
1969 return;
1970
1971 /*
1972 * The bulkreadcompletion routine will check
1973 * this flag and dump add read data
1974 */
1975 edge_port->close_pending = 1;
1976
1977 usb_kill_urb(port->read_urb);
1978 usb_kill_urb(port->write_urb);
1979 edge_port->ep_write_urb_in_use = 0;
1980 spin_lock_irqsave(&edge_port->ep_lock, flags);
1981 kfifo_reset_out(&port->write_fifo);
1982 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1983
1984 dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
1985 send_port_cmd(port, UMPC_CLOSE_PORT, 0, NULL, 0);
1986
1987 mutex_lock(&edge_serial->es_lock);
1988 --edge_port->edge_serial->num_ports_open;
1989 if (edge_port->edge_serial->num_ports_open <= 0) {
1990 /* last port is now closed, let's shut down our interrupt urb */
1991 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1992 edge_port->edge_serial->num_ports_open = 0;
1993 }
1994 mutex_unlock(&edge_serial->es_lock);
1995 edge_port->close_pending = 0;
1996 }
1997
edge_write(struct tty_struct * tty,struct usb_serial_port * port,const unsigned char * data,int count)1998 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1999 const unsigned char *data, int count)
2000 {
2001 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2002
2003 if (count == 0) {
2004 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
2005 return 0;
2006 }
2007
2008 if (edge_port == NULL)
2009 return -ENODEV;
2010 if (edge_port->close_pending == 1)
2011 return -ENODEV;
2012
2013 count = kfifo_in_locked(&port->write_fifo, data, count,
2014 &edge_port->ep_lock);
2015 edge_send(port, tty);
2016
2017 return count;
2018 }
2019
edge_send(struct usb_serial_port * port,struct tty_struct * tty)2020 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
2021 {
2022 int count, result;
2023 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2024 unsigned long flags;
2025
2026 spin_lock_irqsave(&edge_port->ep_lock, flags);
2027
2028 if (edge_port->ep_write_urb_in_use) {
2029 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2030 return;
2031 }
2032
2033 count = kfifo_out(&port->write_fifo,
2034 port->write_urb->transfer_buffer,
2035 port->bulk_out_size);
2036
2037 if (count == 0) {
2038 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2039 return;
2040 }
2041
2042 edge_port->ep_write_urb_in_use = 1;
2043
2044 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2045
2046 usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
2047
2048 /* set up our urb */
2049 port->write_urb->transfer_buffer_length = count;
2050
2051 /* send the data out the bulk port */
2052 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2053 if (result) {
2054 dev_err_console(port,
2055 "%s - failed submitting write urb, error %d\n",
2056 __func__, result);
2057 edge_port->ep_write_urb_in_use = 0;
2058 /* TODO: reschedule edge_send */
2059 } else
2060 edge_port->port->icount.tx += count;
2061
2062 /*
2063 * wakeup any process waiting for writes to complete
2064 * there is now more room in the buffer for new writes
2065 */
2066 if (tty)
2067 tty_wakeup(tty);
2068 }
2069
edge_write_room(struct tty_struct * tty)2070 static int edge_write_room(struct tty_struct *tty)
2071 {
2072 struct usb_serial_port *port = tty->driver_data;
2073 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2074 int room = 0;
2075 unsigned long flags;
2076
2077 if (edge_port == NULL)
2078 return 0;
2079 if (edge_port->close_pending == 1)
2080 return 0;
2081
2082 spin_lock_irqsave(&edge_port->ep_lock, flags);
2083 room = kfifo_avail(&port->write_fifo);
2084 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2085
2086 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
2087 return room;
2088 }
2089
edge_chars_in_buffer(struct tty_struct * tty)2090 static int edge_chars_in_buffer(struct tty_struct *tty)
2091 {
2092 struct usb_serial_port *port = tty->driver_data;
2093 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2094 int chars = 0;
2095 unsigned long flags;
2096 if (edge_port == NULL)
2097 return 0;
2098
2099 spin_lock_irqsave(&edge_port->ep_lock, flags);
2100 chars = kfifo_len(&port->write_fifo);
2101 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2102
2103 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
2104 return chars;
2105 }
2106
edge_tx_empty(struct usb_serial_port * port)2107 static bool edge_tx_empty(struct usb_serial_port *port)
2108 {
2109 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2110 int ret;
2111
2112 ret = tx_active(edge_port);
2113 if (ret > 0)
2114 return false;
2115
2116 return true;
2117 }
2118
edge_throttle(struct tty_struct * tty)2119 static void edge_throttle(struct tty_struct *tty)
2120 {
2121 struct usb_serial_port *port = tty->driver_data;
2122 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2123 int status;
2124
2125 if (edge_port == NULL)
2126 return;
2127
2128 /* if we are implementing XON/XOFF, send the stop character */
2129 if (I_IXOFF(tty)) {
2130 unsigned char stop_char = STOP_CHAR(tty);
2131 status = edge_write(tty, port, &stop_char, 1);
2132 if (status <= 0) {
2133 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2134 }
2135 }
2136
2137 /*
2138 * if we are implementing RTS/CTS, stop reads
2139 * and the Edgeport will clear the RTS line
2140 */
2141 if (C_CRTSCTS(tty))
2142 stop_read(edge_port);
2143
2144 }
2145
edge_unthrottle(struct tty_struct * tty)2146 static void edge_unthrottle(struct tty_struct *tty)
2147 {
2148 struct usb_serial_port *port = tty->driver_data;
2149 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2150 int status;
2151
2152 if (edge_port == NULL)
2153 return;
2154
2155 /* if we are implementing XON/XOFF, send the start character */
2156 if (I_IXOFF(tty)) {
2157 unsigned char start_char = START_CHAR(tty);
2158 status = edge_write(tty, port, &start_char, 1);
2159 if (status <= 0) {
2160 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2161 }
2162 }
2163 /*
2164 * if we are implementing RTS/CTS, restart reads
2165 * are the Edgeport will assert the RTS line
2166 */
2167 if (C_CRTSCTS(tty)) {
2168 status = restart_read(edge_port);
2169 if (status)
2170 dev_err(&port->dev,
2171 "%s - read bulk usb_submit_urb failed: %d\n",
2172 __func__, status);
2173 }
2174
2175 }
2176
stop_read(struct edgeport_port * edge_port)2177 static void stop_read(struct edgeport_port *edge_port)
2178 {
2179 unsigned long flags;
2180
2181 spin_lock_irqsave(&edge_port->ep_lock, flags);
2182
2183 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2184 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2185 edge_port->shadow_mcr &= ~MCR_RTS;
2186
2187 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2188 }
2189
restart_read(struct edgeport_port * edge_port)2190 static int restart_read(struct edgeport_port *edge_port)
2191 {
2192 struct urb *urb;
2193 int status = 0;
2194 unsigned long flags;
2195
2196 spin_lock_irqsave(&edge_port->ep_lock, flags);
2197
2198 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2199 urb = edge_port->port->read_urb;
2200 status = usb_submit_urb(urb, GFP_ATOMIC);
2201 }
2202 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2203 edge_port->shadow_mcr |= MCR_RTS;
2204
2205 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2206
2207 return status;
2208 }
2209
change_port_settings(struct tty_struct * tty,struct edgeport_port * edge_port,struct ktermios * old_termios)2210 static void change_port_settings(struct tty_struct *tty,
2211 struct edgeport_port *edge_port, struct ktermios *old_termios)
2212 {
2213 struct device *dev = &edge_port->port->dev;
2214 struct ump_uart_config *config;
2215 int baud;
2216 unsigned cflag;
2217 int status;
2218
2219 config = kmalloc (sizeof (*config), GFP_KERNEL);
2220 if (!config) {
2221 tty->termios = *old_termios;
2222 return;
2223 }
2224
2225 cflag = tty->termios.c_cflag;
2226
2227 config->wFlags = 0;
2228
2229 /* These flags must be set */
2230 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2231 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2232 config->bUartMode = (u8)(edge_port->bUartMode);
2233
2234 switch (cflag & CSIZE) {
2235 case CS5:
2236 config->bDataBits = UMP_UART_CHAR5BITS;
2237 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2238 break;
2239 case CS6:
2240 config->bDataBits = UMP_UART_CHAR6BITS;
2241 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2242 break;
2243 case CS7:
2244 config->bDataBits = UMP_UART_CHAR7BITS;
2245 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2246 break;
2247 default:
2248 case CS8:
2249 config->bDataBits = UMP_UART_CHAR8BITS;
2250 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2251 break;
2252 }
2253
2254 if (cflag & PARENB) {
2255 if (cflag & PARODD) {
2256 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2257 config->bParity = UMP_UART_ODDPARITY;
2258 dev_dbg(dev, "%s - parity = odd\n", __func__);
2259 } else {
2260 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2261 config->bParity = UMP_UART_EVENPARITY;
2262 dev_dbg(dev, "%s - parity = even\n", __func__);
2263 }
2264 } else {
2265 config->bParity = UMP_UART_NOPARITY;
2266 dev_dbg(dev, "%s - parity = none\n", __func__);
2267 }
2268
2269 if (cflag & CSTOPB) {
2270 config->bStopBits = UMP_UART_STOPBIT2;
2271 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2272 } else {
2273 config->bStopBits = UMP_UART_STOPBIT1;
2274 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2275 }
2276
2277 /* figure out the flow control settings */
2278 if (cflag & CRTSCTS) {
2279 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2280 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2281 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2282 } else {
2283 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2284 restart_read(edge_port);
2285 }
2286
2287 /*
2288 * if we are implementing XON/XOFF, set the start and stop
2289 * character in the device
2290 */
2291 config->cXon = START_CHAR(tty);
2292 config->cXoff = STOP_CHAR(tty);
2293
2294 /* if we are implementing INBOUND XON/XOFF */
2295 if (I_IXOFF(tty)) {
2296 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2297 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2298 __func__, config->cXon, config->cXoff);
2299 } else
2300 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2301
2302 /* if we are implementing OUTBOUND XON/XOFF */
2303 if (I_IXON(tty)) {
2304 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2305 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2306 __func__, config->cXon, config->cXoff);
2307 } else
2308 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2309
2310 tty->termios.c_cflag &= ~CMSPAR;
2311
2312 /* Round the baud rate */
2313 baud = tty_get_baud_rate(tty);
2314 if (!baud) {
2315 /* pick a default, any default... */
2316 baud = 9600;
2317 } else {
2318 /* Avoid a zero divisor. */
2319 baud = min(baud, 461550);
2320 tty_encode_baud_rate(tty, baud, baud);
2321 }
2322
2323 edge_port->baud_rate = baud;
2324 config->wBaudRate = (u16)((461550L + baud/2) / baud);
2325
2326 /* FIXME: Recompute actual baud from divisor here */
2327
2328 dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2329
2330 dev_dbg(dev, "wBaudRate: %d\n", (int)(461550L / config->wBaudRate));
2331 dev_dbg(dev, "wFlags: 0x%x\n", config->wFlags);
2332 dev_dbg(dev, "bDataBits: %d\n", config->bDataBits);
2333 dev_dbg(dev, "bParity: %d\n", config->bParity);
2334 dev_dbg(dev, "bStopBits: %d\n", config->bStopBits);
2335 dev_dbg(dev, "cXon: %d\n", config->cXon);
2336 dev_dbg(dev, "cXoff: %d\n", config->cXoff);
2337 dev_dbg(dev, "bUartMode: %d\n", config->bUartMode);
2338
2339 /* move the word values into big endian mode */
2340 cpu_to_be16s(&config->wFlags);
2341 cpu_to_be16s(&config->wBaudRate);
2342
2343 status = send_port_cmd(edge_port->port, UMPC_SET_CONFIG, 0, config,
2344 sizeof(*config));
2345 if (status)
2346 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2347 __func__, status);
2348 kfree(config);
2349 }
2350
edge_set_termios(struct tty_struct * tty,struct usb_serial_port * port,struct ktermios * old_termios)2351 static void edge_set_termios(struct tty_struct *tty,
2352 struct usb_serial_port *port, struct ktermios *old_termios)
2353 {
2354 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2355
2356 if (edge_port == NULL)
2357 return;
2358 /* change the port settings to the new ones specified */
2359 change_port_settings(tty, edge_port, old_termios);
2360 }
2361
edge_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)2362 static int edge_tiocmset(struct tty_struct *tty,
2363 unsigned int set, unsigned int clear)
2364 {
2365 struct usb_serial_port *port = tty->driver_data;
2366 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2367 unsigned int mcr;
2368 unsigned long flags;
2369
2370 spin_lock_irqsave(&edge_port->ep_lock, flags);
2371 mcr = edge_port->shadow_mcr;
2372 if (set & TIOCM_RTS)
2373 mcr |= MCR_RTS;
2374 if (set & TIOCM_DTR)
2375 mcr |= MCR_DTR;
2376 if (set & TIOCM_LOOP)
2377 mcr |= MCR_LOOPBACK;
2378
2379 if (clear & TIOCM_RTS)
2380 mcr &= ~MCR_RTS;
2381 if (clear & TIOCM_DTR)
2382 mcr &= ~MCR_DTR;
2383 if (clear & TIOCM_LOOP)
2384 mcr &= ~MCR_LOOPBACK;
2385
2386 edge_port->shadow_mcr = mcr;
2387 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2388
2389 restore_mcr(edge_port, mcr);
2390 return 0;
2391 }
2392
edge_tiocmget(struct tty_struct * tty)2393 static int edge_tiocmget(struct tty_struct *tty)
2394 {
2395 struct usb_serial_port *port = tty->driver_data;
2396 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2397 unsigned int result = 0;
2398 unsigned int msr;
2399 unsigned int mcr;
2400 unsigned long flags;
2401
2402 spin_lock_irqsave(&edge_port->ep_lock, flags);
2403
2404 msr = edge_port->shadow_msr;
2405 mcr = edge_port->shadow_mcr;
2406 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
2407 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
2408 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
2409 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
2410 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
2411 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
2412
2413
2414 dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2415 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2416
2417 return result;
2418 }
2419
edge_break(struct tty_struct * tty,int break_state)2420 static void edge_break(struct tty_struct *tty, int break_state)
2421 {
2422 struct usb_serial_port *port = tty->driver_data;
2423 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2424 int status;
2425 int bv = 0; /* Off */
2426
2427 if (break_state == -1)
2428 bv = 1; /* On */
2429 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2430 if (status)
2431 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2432 __func__, status);
2433 }
2434
edge_heartbeat_schedule(struct edgeport_serial * edge_serial)2435 static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial)
2436 {
2437 if (!edge_serial->use_heartbeat)
2438 return;
2439
2440 schedule_delayed_work(&edge_serial->heartbeat_work,
2441 FW_HEARTBEAT_SECS * HZ);
2442 }
2443
edge_heartbeat_work(struct work_struct * work)2444 static void edge_heartbeat_work(struct work_struct *work)
2445 {
2446 struct edgeport_serial *serial;
2447 struct ti_i2c_desc *rom_desc;
2448
2449 serial = container_of(work, struct edgeport_serial,
2450 heartbeat_work.work);
2451
2452 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
2453
2454 /* Descriptor address request is enough to reset the firmware timer */
2455 if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
2456 rom_desc)) {
2457 dev_err(&serial->serial->interface->dev,
2458 "%s - Incomplete heartbeat\n", __func__);
2459 }
2460 kfree(rom_desc);
2461
2462 edge_heartbeat_schedule(serial);
2463 }
2464
edge_calc_num_ports(struct usb_serial * serial,struct usb_serial_endpoints * epds)2465 static int edge_calc_num_ports(struct usb_serial *serial,
2466 struct usb_serial_endpoints *epds)
2467 {
2468 struct device *dev = &serial->interface->dev;
2469 unsigned char num_ports = serial->type->num_ports;
2470
2471 /* Make sure we have the required endpoints when in download mode. */
2472 if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) {
2473 if (epds->num_bulk_in < num_ports ||
2474 epds->num_bulk_out < num_ports ||
2475 epds->num_interrupt_in < 1) {
2476 dev_err(dev, "required endpoints missing\n");
2477 return -ENODEV;
2478 }
2479 }
2480
2481 return num_ports;
2482 }
2483
edge_startup(struct usb_serial * serial)2484 static int edge_startup(struct usb_serial *serial)
2485 {
2486 struct edgeport_serial *edge_serial;
2487 int status;
2488 u16 product_id;
2489
2490 /* create our private serial structure */
2491 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2492 if (!edge_serial)
2493 return -ENOMEM;
2494
2495 mutex_init(&edge_serial->es_lock);
2496 edge_serial->serial = serial;
2497 INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work);
2498 usb_set_serial_data(serial, edge_serial);
2499
2500 status = download_fw(edge_serial);
2501 if (status < 0) {
2502 kfree(edge_serial);
2503 return status;
2504 }
2505
2506 if (status > 0)
2507 return 1; /* bind but do not register any ports */
2508
2509 product_id = le16_to_cpu(
2510 edge_serial->serial->dev->descriptor.idProduct);
2511
2512 /* Currently only the EP/416 models require heartbeat support */
2513 if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) {
2514 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 ||
2515 product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) {
2516 edge_serial->use_heartbeat = true;
2517 }
2518 }
2519
2520 edge_heartbeat_schedule(edge_serial);
2521
2522 return 0;
2523 }
2524
edge_disconnect(struct usb_serial * serial)2525 static void edge_disconnect(struct usb_serial *serial)
2526 {
2527 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2528
2529 cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2530 }
2531
edge_release(struct usb_serial * serial)2532 static void edge_release(struct usb_serial *serial)
2533 {
2534 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2535
2536 cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2537 kfree(edge_serial);
2538 }
2539
edge_port_probe(struct usb_serial_port * port)2540 static int edge_port_probe(struct usb_serial_port *port)
2541 {
2542 struct edgeport_port *edge_port;
2543 int ret;
2544
2545 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2546 if (!edge_port)
2547 return -ENOMEM;
2548
2549 spin_lock_init(&edge_port->ep_lock);
2550 edge_port->port = port;
2551 edge_port->edge_serial = usb_get_serial_data(port->serial);
2552 edge_port->bUartMode = default_uart_mode;
2553
2554 switch (port->port_number) {
2555 case 0:
2556 edge_port->uart_base = UMPMEM_BASE_UART1;
2557 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2558 break;
2559 case 1:
2560 edge_port->uart_base = UMPMEM_BASE_UART2;
2561 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2562 break;
2563 default:
2564 dev_err(&port->dev, "unknown port number\n");
2565 ret = -ENODEV;
2566 goto err;
2567 }
2568
2569 dev_dbg(&port->dev,
2570 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2571 __func__, port->port_number, edge_port->uart_base,
2572 edge_port->dma_address);
2573
2574 usb_set_serial_port_data(port, edge_port);
2575
2576 ret = edge_create_sysfs_attrs(port);
2577 if (ret)
2578 goto err;
2579
2580 /*
2581 * The LSR does not tell when the transmitter shift register has
2582 * emptied so add a one-character drain delay.
2583 */
2584 port->port.drain_delay = 1;
2585
2586 return 0;
2587 err:
2588 kfree(edge_port);
2589
2590 return ret;
2591 }
2592
edge_port_remove(struct usb_serial_port * port)2593 static void edge_port_remove(struct usb_serial_port *port)
2594 {
2595 struct edgeport_port *edge_port;
2596
2597 edge_port = usb_get_serial_port_data(port);
2598 edge_remove_sysfs_attrs(port);
2599 kfree(edge_port);
2600 }
2601
2602 /* Sysfs Attributes */
2603
uart_mode_show(struct device * dev,struct device_attribute * attr,char * buf)2604 static ssize_t uart_mode_show(struct device *dev,
2605 struct device_attribute *attr, char *buf)
2606 {
2607 struct usb_serial_port *port = to_usb_serial_port(dev);
2608 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2609
2610 return sprintf(buf, "%d\n", edge_port->bUartMode);
2611 }
2612
uart_mode_store(struct device * dev,struct device_attribute * attr,const char * valbuf,size_t count)2613 static ssize_t uart_mode_store(struct device *dev,
2614 struct device_attribute *attr, const char *valbuf, size_t count)
2615 {
2616 struct usb_serial_port *port = to_usb_serial_port(dev);
2617 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2618 unsigned int v = simple_strtoul(valbuf, NULL, 0);
2619
2620 dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2621
2622 if (v < 256)
2623 edge_port->bUartMode = v;
2624 else
2625 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2626
2627 return count;
2628 }
2629 static DEVICE_ATTR_RW(uart_mode);
2630
edge_create_sysfs_attrs(struct usb_serial_port * port)2631 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2632 {
2633 return device_create_file(&port->dev, &dev_attr_uart_mode);
2634 }
2635
edge_remove_sysfs_attrs(struct usb_serial_port * port)2636 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2637 {
2638 device_remove_file(&port->dev, &dev_attr_uart_mode);
2639 return 0;
2640 }
2641
2642 #ifdef CONFIG_PM
edge_suspend(struct usb_serial * serial,pm_message_t message)2643 static int edge_suspend(struct usb_serial *serial, pm_message_t message)
2644 {
2645 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2646
2647 cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2648
2649 return 0;
2650 }
2651
edge_resume(struct usb_serial * serial)2652 static int edge_resume(struct usb_serial *serial)
2653 {
2654 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2655
2656 edge_heartbeat_schedule(edge_serial);
2657
2658 return 0;
2659 }
2660 #endif
2661
2662 static struct usb_serial_driver edgeport_1port_device = {
2663 .driver = {
2664 .owner = THIS_MODULE,
2665 .name = "edgeport_ti_1",
2666 },
2667 .description = "Edgeport TI 1 port adapter",
2668 .id_table = edgeport_1port_id_table,
2669 .num_ports = 1,
2670 .num_bulk_out = 1,
2671 .open = edge_open,
2672 .close = edge_close,
2673 .throttle = edge_throttle,
2674 .unthrottle = edge_unthrottle,
2675 .attach = edge_startup,
2676 .calc_num_ports = edge_calc_num_ports,
2677 .disconnect = edge_disconnect,
2678 .release = edge_release,
2679 .port_probe = edge_port_probe,
2680 .port_remove = edge_port_remove,
2681 .set_termios = edge_set_termios,
2682 .tiocmget = edge_tiocmget,
2683 .tiocmset = edge_tiocmset,
2684 .tiocmiwait = usb_serial_generic_tiocmiwait,
2685 .get_icount = usb_serial_generic_get_icount,
2686 .write = edge_write,
2687 .write_room = edge_write_room,
2688 .chars_in_buffer = edge_chars_in_buffer,
2689 .tx_empty = edge_tx_empty,
2690 .break_ctl = edge_break,
2691 .read_int_callback = edge_interrupt_callback,
2692 .read_bulk_callback = edge_bulk_in_callback,
2693 .write_bulk_callback = edge_bulk_out_callback,
2694 #ifdef CONFIG_PM
2695 .suspend = edge_suspend,
2696 .resume = edge_resume,
2697 #endif
2698 };
2699
2700 static struct usb_serial_driver edgeport_2port_device = {
2701 .driver = {
2702 .owner = THIS_MODULE,
2703 .name = "edgeport_ti_2",
2704 },
2705 .description = "Edgeport TI 2 port adapter",
2706 .id_table = edgeport_2port_id_table,
2707 .num_ports = 2,
2708 .num_bulk_out = 1,
2709 .open = edge_open,
2710 .close = edge_close,
2711 .throttle = edge_throttle,
2712 .unthrottle = edge_unthrottle,
2713 .attach = edge_startup,
2714 .calc_num_ports = edge_calc_num_ports,
2715 .disconnect = edge_disconnect,
2716 .release = edge_release,
2717 .port_probe = edge_port_probe,
2718 .port_remove = edge_port_remove,
2719 .set_termios = edge_set_termios,
2720 .tiocmget = edge_tiocmget,
2721 .tiocmset = edge_tiocmset,
2722 .tiocmiwait = usb_serial_generic_tiocmiwait,
2723 .get_icount = usb_serial_generic_get_icount,
2724 .write = edge_write,
2725 .write_room = edge_write_room,
2726 .chars_in_buffer = edge_chars_in_buffer,
2727 .tx_empty = edge_tx_empty,
2728 .break_ctl = edge_break,
2729 .read_int_callback = edge_interrupt_callback,
2730 .read_bulk_callback = edge_bulk_in_callback,
2731 .write_bulk_callback = edge_bulk_out_callback,
2732 #ifdef CONFIG_PM
2733 .suspend = edge_suspend,
2734 .resume = edge_resume,
2735 #endif
2736 };
2737
2738 static struct usb_serial_driver * const serial_drivers[] = {
2739 &edgeport_1port_device, &edgeport_2port_device, NULL
2740 };
2741
2742 module_usb_serial_driver(serial_drivers, id_table_combined);
2743
2744 MODULE_AUTHOR(DRIVER_AUTHOR);
2745 MODULE_DESCRIPTION(DRIVER_DESC);
2746 MODULE_LICENSE("GPL");
2747 MODULE_FIRMWARE("edgeport/down3.bin");
2748
2749 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2750 MODULE_PARM_DESC(ignore_cpu_rev,
2751 "Ignore the cpu revision when connecting to a device");
2752
2753 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2754 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
2755