xref: /linux/drivers/usb/serial/io_ti.c (revision 4949009eb8d40a441dcddcd96e101e77d31cf1b2)
1 /*
2  * Edgeport USB Serial Converter driver
3  *
4  * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6  *
7  *	This program is free software; you can redistribute it and/or modify
8  *	it under the terms of the GNU General Public License as published by
9  *	the Free Software Foundation; either version 2 of the License, or
10  *	(at your option) any later version.
11  *
12  * Supports the following devices:
13  *	EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
14  *
15  * For questions or problems with this driver, contact Inside Out
16  * Networks technical support, or Peter Berger <pberger@brimson.com>,
17  * or Al Borchers <alborchers@steinerpoint.com>.
18  */
19 
20 #include <linux/kernel.h>
21 #include <linux/jiffies.h>
22 #include <linux/errno.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/mutex.h>
30 #include <linux/serial.h>
31 #include <linux/swab.h>
32 #include <linux/kfifo.h>
33 #include <linux/ioctl.h>
34 #include <linux/firmware.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38 
39 #include "io_16654.h"
40 #include "io_usbvend.h"
41 #include "io_ti.h"
42 
43 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
44 #define DRIVER_DESC "Edgeport USB Serial Driver"
45 
46 #define EPROM_PAGE_SIZE		64
47 
48 
49 /* different hardware types */
50 #define HARDWARE_TYPE_930	0
51 #define HARDWARE_TYPE_TIUMP	1
52 
53 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
54 #define	TI_MODE_CONFIGURING	0   /* Device has not entered start device */
55 #define	TI_MODE_BOOT		1   /* Staying in boot mode		   */
56 #define TI_MODE_DOWNLOAD	2   /* Made it to download mode		   */
57 #define TI_MODE_TRANSITIONING	3   /* Currently in boot mode but
58 				       transitioning to download mode	   */
59 
60 /* read urb state */
61 #define EDGE_READ_URB_RUNNING	0
62 #define EDGE_READ_URB_STOPPING	1
63 #define EDGE_READ_URB_STOPPED	2
64 
65 #define EDGE_CLOSING_WAIT	4000	/* in .01 sec */
66 
67 
68 /* Product information read from the Edgeport */
69 struct product_info {
70 	int	TiMode;			/* Current TI Mode  */
71 	__u8	hardware_type;		/* Type of hardware */
72 } __attribute__((packed));
73 
74 struct edgeport_port {
75 	__u16 uart_base;
76 	__u16 dma_address;
77 	__u8 shadow_msr;
78 	__u8 shadow_mcr;
79 	__u8 shadow_lsr;
80 	__u8 lsr_mask;
81 	__u32 ump_read_timeout;		/* Number of milliseconds the UMP will
82 					   wait without data before completing
83 					   a read short */
84 	int baud_rate;
85 	int close_pending;
86 	int lsr_event;
87 
88 	struct edgeport_serial	*edge_serial;
89 	struct usb_serial_port	*port;
90 	__u8 bUartMode;		/* Port type, 0: RS232, etc. */
91 	spinlock_t ep_lock;
92 	int ep_read_urb_state;
93 	int ep_write_urb_in_use;
94 };
95 
96 struct edgeport_serial {
97 	struct product_info product_info;
98 	u8 TI_I2C_Type;			/* Type of I2C in UMP */
99 	u8 TiReadI2C;			/* Set to TRUE if we have read the
100 					   I2c in Boot Mode */
101 	struct mutex es_lock;
102 	int num_ports_open;
103 	struct usb_serial *serial;
104 };
105 
106 
107 /* Devices that this driver supports */
108 static const struct usb_device_id edgeport_1port_id_table[] = {
109 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
110 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
111 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
112 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
113 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
114 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
115 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
116 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
117 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
118 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
119 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
120 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
121 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
122 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
123 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
124 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
125 	{ }
126 };
127 
128 static const struct usb_device_id edgeport_2port_id_table[] = {
129 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
130 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
131 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
132 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
133 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
134 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
135 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
136 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
137 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
138 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
139 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
140 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
141 	/* The 4, 8 and 16 port devices show up as multiple 2 port devices */
142 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
143 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
144 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
145 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
146 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
147 	{ }
148 };
149 
150 /* Devices that this driver supports */
151 static const struct usb_device_id id_table_combined[] = {
152 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
153 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
154 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
155 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
156 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
157 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
158 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
159 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
160 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
161 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
162 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
163 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
164 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
165 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
166 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
167 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
168 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
169 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
170 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
171 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
172 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
173 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
174 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
175 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
176 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
177 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
178 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
179 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
180 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
181 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
182 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
183 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
184 	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
185 	{ }
186 };
187 
188 MODULE_DEVICE_TABLE(usb, id_table_combined);
189 
190 static unsigned char OperationalMajorVersion;
191 static unsigned char OperationalMinorVersion;
192 static unsigned short OperationalBuildNumber;
193 
194 static int closing_wait = EDGE_CLOSING_WAIT;
195 static bool ignore_cpu_rev;
196 static int default_uart_mode;		/* RS232 */
197 
198 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
199 		int length);
200 
201 static void stop_read(struct edgeport_port *edge_port);
202 static int restart_read(struct edgeport_port *edge_port);
203 
204 static void edge_set_termios(struct tty_struct *tty,
205 		struct usb_serial_port *port, struct ktermios *old_termios);
206 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
207 
208 /* sysfs attributes */
209 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
210 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
211 
212 
213 static int ti_vread_sync(struct usb_device *dev, __u8 request,
214 				__u16 value, __u16 index, u8 *data, int size)
215 {
216 	int status;
217 
218 	status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
219 			(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
220 			value, index, data, size, 1000);
221 	if (status < 0)
222 		return status;
223 	if (status != size) {
224 		dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
225 			__func__, size, status);
226 		return -ECOMM;
227 	}
228 	return 0;
229 }
230 
231 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
232 				__u16 value, __u16 index, u8 *data, int size)
233 {
234 	int status;
235 
236 	status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
237 			(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
238 			value, index, data, size, 1000);
239 	if (status < 0)
240 		return status;
241 	if (status != size) {
242 		dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
243 			__func__, size, status);
244 		return -ECOMM;
245 	}
246 	return 0;
247 }
248 
249 static int send_cmd(struct usb_device *dev, __u8 command,
250 				__u8 moduleid, __u16 value, u8 *data,
251 				int size)
252 {
253 	return ti_vsend_sync(dev, command, value, moduleid, data, size);
254 }
255 
256 /* clear tx/rx buffers and fifo in TI UMP */
257 static int purge_port(struct usb_serial_port *port, __u16 mask)
258 {
259 	int port_number = port->port_number;
260 
261 	dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
262 
263 	return send_cmd(port->serial->dev,
264 					UMPC_PURGE_PORT,
265 					(__u8)(UMPM_UART1_PORT + port_number),
266 					mask,
267 					NULL,
268 					0);
269 }
270 
271 /**
272  * read_download_mem - Read edgeport memory from TI chip
273  * @dev: usb device pointer
274  * @start_address: Device CPU address at which to read
275  * @length: Length of above data
276  * @address_type: Can read both XDATA and I2C
277  * @buffer: pointer to input data buffer
278  */
279 static int read_download_mem(struct usb_device *dev, int start_address,
280 				int length, __u8 address_type, __u8 *buffer)
281 {
282 	int status = 0;
283 	__u8 read_length;
284 	u16 be_start_address;
285 
286 	dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
287 
288 	/* Read in blocks of 64 bytes
289 	 * (TI firmware can't handle more than 64 byte reads)
290 	 */
291 	while (length) {
292 		if (length > 64)
293 			read_length = 64;
294 		else
295 			read_length = (__u8)length;
296 
297 		if (read_length > 1) {
298 			dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
299 		}
300 		/*
301 		 * NOTE: Must use swab as wIndex is sent in little-endian
302 		 *       byte order regardless of host byte order.
303 		 */
304 		be_start_address = swab16((u16)start_address);
305 		status = ti_vread_sync(dev, UMPC_MEMORY_READ,
306 					(__u16)address_type,
307 					be_start_address,
308 					buffer, read_length);
309 
310 		if (status) {
311 			dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
312 			return status;
313 		}
314 
315 		if (read_length > 1)
316 			usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
317 
318 		/* Update pointers/length */
319 		start_address += read_length;
320 		buffer += read_length;
321 		length -= read_length;
322 	}
323 
324 	return status;
325 }
326 
327 static int read_ram(struct usb_device *dev, int start_address,
328 						int length, __u8 *buffer)
329 {
330 	return read_download_mem(dev, start_address, length,
331 					DTK_ADDR_SPACE_XDATA, buffer);
332 }
333 
334 /* Read edgeport memory to a given block */
335 static int read_boot_mem(struct edgeport_serial *serial,
336 				int start_address, int length, __u8 *buffer)
337 {
338 	int status = 0;
339 	int i;
340 
341 	for (i = 0; i < length; i++) {
342 		status = ti_vread_sync(serial->serial->dev,
343 				UMPC_MEMORY_READ, serial->TI_I2C_Type,
344 				(__u16)(start_address+i), &buffer[i], 0x01);
345 		if (status) {
346 			dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
347 			return status;
348 		}
349 	}
350 
351 	dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
352 		__func__, start_address, length);
353 	usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
354 
355 	serial->TiReadI2C = 1;
356 
357 	return status;
358 }
359 
360 /* Write given block to TI EPROM memory */
361 static int write_boot_mem(struct edgeport_serial *serial,
362 				int start_address, int length, __u8 *buffer)
363 {
364 	int status = 0;
365 	int i;
366 	u8 *temp;
367 
368 	/* Must do a read before write */
369 	if (!serial->TiReadI2C) {
370 		temp = kmalloc(1, GFP_KERNEL);
371 		if (!temp)
372 			return -ENOMEM;
373 
374 		status = read_boot_mem(serial, 0, 1, temp);
375 		kfree(temp);
376 		if (status)
377 			return status;
378 	}
379 
380 	for (i = 0; i < length; ++i) {
381 		status = ti_vsend_sync(serial->serial->dev,
382 				UMPC_MEMORY_WRITE, buffer[i],
383 				(__u16)(i + start_address), NULL, 0);
384 		if (status)
385 			return status;
386 	}
387 
388 	dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
389 	usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
390 
391 	return status;
392 }
393 
394 
395 /* Write edgeport I2C memory to TI chip	*/
396 static int write_i2c_mem(struct edgeport_serial *serial,
397 		int start_address, int length, __u8 address_type, __u8 *buffer)
398 {
399 	struct device *dev = &serial->serial->dev->dev;
400 	int status = 0;
401 	int write_length;
402 	u16 be_start_address;
403 
404 	/* We can only send a maximum of 1 aligned byte page at a time */
405 
406 	/* calculate the number of bytes left in the first page */
407 	write_length = EPROM_PAGE_SIZE -
408 				(start_address & (EPROM_PAGE_SIZE - 1));
409 
410 	if (write_length > length)
411 		write_length = length;
412 
413 	dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
414 		__func__, start_address, write_length);
415 	usb_serial_debug_data(dev, __func__, write_length, buffer);
416 
417 	/*
418 	 * Write first page.
419 	 *
420 	 * NOTE: Must use swab as wIndex is sent in little-endian byte order
421 	 *       regardless of host byte order.
422 	 */
423 	be_start_address = swab16((u16)start_address);
424 	status = ti_vsend_sync(serial->serial->dev,
425 				UMPC_MEMORY_WRITE, (__u16)address_type,
426 				be_start_address,
427 				buffer,	write_length);
428 	if (status) {
429 		dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
430 		return status;
431 	}
432 
433 	length		-= write_length;
434 	start_address	+= write_length;
435 	buffer		+= write_length;
436 
437 	/* We should be aligned now -- can write
438 	   max page size bytes at a time */
439 	while (length) {
440 		if (length > EPROM_PAGE_SIZE)
441 			write_length = EPROM_PAGE_SIZE;
442 		else
443 			write_length = length;
444 
445 		dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
446 			__func__, start_address, write_length);
447 		usb_serial_debug_data(dev, __func__, write_length, buffer);
448 
449 		/*
450 		 * Write next page.
451 		 *
452 		 * NOTE: Must use swab as wIndex is sent in little-endian byte
453 		 *       order regardless of host byte order.
454 		 */
455 		be_start_address = swab16((u16)start_address);
456 		status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
457 				(__u16)address_type,
458 				be_start_address,
459 				buffer, write_length);
460 		if (status) {
461 			dev_err(dev, "%s - ERROR %d\n", __func__, status);
462 			return status;
463 		}
464 
465 		length		-= write_length;
466 		start_address	+= write_length;
467 		buffer		+= write_length;
468 	}
469 	return status;
470 }
471 
472 /* Examine the UMP DMA registers and LSR
473  *
474  * Check the MSBit of the X and Y DMA byte count registers.
475  * A zero in this bit indicates that the TX DMA buffers are empty
476  * then check the TX Empty bit in the UART.
477  */
478 static int tx_active(struct edgeport_port *port)
479 {
480 	int status;
481 	struct out_endpoint_desc_block *oedb;
482 	__u8 *lsr;
483 	int bytes_left = 0;
484 
485 	oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
486 	if (!oedb)
487 		return -ENOMEM;
488 
489 	lsr = kmalloc(1, GFP_KERNEL);	/* Sigh, that's right, just one byte,
490 					   as not all platforms can do DMA
491 					   from stack */
492 	if (!lsr) {
493 		kfree(oedb);
494 		return -ENOMEM;
495 	}
496 	/* Read the DMA Count Registers */
497 	status = read_ram(port->port->serial->dev, port->dma_address,
498 						sizeof(*oedb), (void *)oedb);
499 	if (status)
500 		goto exit_is_tx_active;
501 
502 	dev_dbg(&port->port->dev, "%s - XByteCount    0x%X\n", __func__, oedb->XByteCount);
503 
504 	/* and the LSR */
505 	status = read_ram(port->port->serial->dev,
506 			port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
507 
508 	if (status)
509 		goto exit_is_tx_active;
510 	dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
511 
512 	/* If either buffer has data or we are transmitting then return TRUE */
513 	if ((oedb->XByteCount & 0x80) != 0)
514 		bytes_left += 64;
515 
516 	if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
517 		bytes_left += 1;
518 
519 	/* We return Not Active if we get any kind of error */
520 exit_is_tx_active:
521 	dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
522 
523 	kfree(lsr);
524 	kfree(oedb);
525 	return bytes_left;
526 }
527 
528 static int choose_config(struct usb_device *dev)
529 {
530 	/*
531 	 * There may be multiple configurations on this device, in which case
532 	 * we would need to read and parse all of them to find out which one
533 	 * we want. However, we just support one config at this point,
534 	 * configuration # 1, which is Config Descriptor 0.
535 	 */
536 
537 	dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
538 		__func__, dev->config->desc.bNumInterfaces);
539 	dev_dbg(&dev->dev, "%s - MAX Power            = %d\n",
540 		__func__, dev->config->desc.bMaxPower * 2);
541 
542 	if (dev->config->desc.bNumInterfaces != 1) {
543 		dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
544 		return -ENODEV;
545 	}
546 
547 	return 0;
548 }
549 
550 static int read_rom(struct edgeport_serial *serial,
551 				int start_address, int length, __u8 *buffer)
552 {
553 	int status;
554 
555 	if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
556 		status = read_download_mem(serial->serial->dev,
557 					       start_address,
558 					       length,
559 					       serial->TI_I2C_Type,
560 					       buffer);
561 	} else {
562 		status = read_boot_mem(serial, start_address, length,
563 								buffer);
564 	}
565 	return status;
566 }
567 
568 static int write_rom(struct edgeport_serial *serial, int start_address,
569 						int length, __u8 *buffer)
570 {
571 	if (serial->product_info.TiMode == TI_MODE_BOOT)
572 		return write_boot_mem(serial, start_address, length,
573 								buffer);
574 
575 	if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
576 		return write_i2c_mem(serial, start_address, length,
577 						serial->TI_I2C_Type, buffer);
578 	return -EINVAL;
579 }
580 
581 
582 
583 /* Read a descriptor header from I2C based on type */
584 static int get_descriptor_addr(struct edgeport_serial *serial,
585 				int desc_type, struct ti_i2c_desc *rom_desc)
586 {
587 	int start_address;
588 	int status;
589 
590 	/* Search for requested descriptor in I2C */
591 	start_address = 2;
592 	do {
593 		status = read_rom(serial,
594 				   start_address,
595 				   sizeof(struct ti_i2c_desc),
596 				   (__u8 *)rom_desc);
597 		if (status)
598 			return 0;
599 
600 		if (rom_desc->Type == desc_type)
601 			return start_address;
602 
603 		start_address = start_address + sizeof(struct ti_i2c_desc) +
604 						le16_to_cpu(rom_desc->Size);
605 
606 	} while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
607 
608 	return 0;
609 }
610 
611 /* Validate descriptor checksum */
612 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
613 {
614 	__u16 i;
615 	__u8 cs = 0;
616 
617 	for (i = 0; i < le16_to_cpu(rom_desc->Size); i++)
618 		cs = (__u8)(cs + buffer[i]);
619 
620 	if (cs != rom_desc->CheckSum) {
621 		pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
622 		return -EINVAL;
623 	}
624 	return 0;
625 }
626 
627 /* Make sure that the I2C image is good */
628 static int check_i2c_image(struct edgeport_serial *serial)
629 {
630 	struct device *dev = &serial->serial->dev->dev;
631 	int status = 0;
632 	struct ti_i2c_desc *rom_desc;
633 	int start_address = 2;
634 	__u8 *buffer;
635 	__u16 ttype;
636 
637 	rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
638 	if (!rom_desc)
639 		return -ENOMEM;
640 
641 	buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
642 	if (!buffer) {
643 		kfree(rom_desc);
644 		return -ENOMEM;
645 	}
646 
647 	/* Read the first byte (Signature0) must be 0x52 or 0x10 */
648 	status = read_rom(serial, 0, 1, buffer);
649 	if (status)
650 		goto out;
651 
652 	if (*buffer != UMP5152 && *buffer != UMP3410) {
653 		dev_err(dev, "%s - invalid buffer signature\n", __func__);
654 		status = -ENODEV;
655 		goto out;
656 	}
657 
658 	do {
659 		/* Validate the I2C */
660 		status = read_rom(serial,
661 				start_address,
662 				sizeof(struct ti_i2c_desc),
663 				(__u8 *)rom_desc);
664 		if (status)
665 			break;
666 
667 		if ((start_address + sizeof(struct ti_i2c_desc) +
668 			le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) {
669 			status = -ENODEV;
670 			dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
671 			break;
672 		}
673 
674 		dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
675 
676 		/* Skip type 2 record */
677 		ttype = rom_desc->Type & 0x0f;
678 		if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
679 			&& ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
680 			/* Read the descriptor data */
681 			status = read_rom(serial, start_address +
682 						sizeof(struct ti_i2c_desc),
683 						le16_to_cpu(rom_desc->Size),
684 						buffer);
685 			if (status)
686 				break;
687 
688 			status = valid_csum(rom_desc, buffer);
689 			if (status)
690 				break;
691 		}
692 		start_address = start_address + sizeof(struct ti_i2c_desc) +
693 						le16_to_cpu(rom_desc->Size);
694 
695 	} while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
696 				(start_address < TI_MAX_I2C_SIZE));
697 
698 	if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
699 				(start_address > TI_MAX_I2C_SIZE))
700 		status = -ENODEV;
701 
702 out:
703 	kfree(buffer);
704 	kfree(rom_desc);
705 	return status;
706 }
707 
708 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
709 {
710 	int status;
711 	int start_address;
712 	struct ti_i2c_desc *rom_desc;
713 	struct edge_ti_manuf_descriptor *desc;
714 	struct device *dev = &serial->serial->dev->dev;
715 
716 	rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
717 	if (!rom_desc)
718 		return -ENOMEM;
719 
720 	start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
721 								rom_desc);
722 
723 	if (!start_address) {
724 		dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
725 		status = -ENODEV;
726 		goto exit;
727 	}
728 
729 	/* Read the descriptor data */
730 	status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
731 					le16_to_cpu(rom_desc->Size), buffer);
732 	if (status)
733 		goto exit;
734 
735 	status = valid_csum(rom_desc, buffer);
736 
737 	desc = (struct edge_ti_manuf_descriptor *)buffer;
738 	dev_dbg(dev, "%s - IonConfig      0x%x\n", __func__, desc->IonConfig);
739 	dev_dbg(dev, "%s - Version          %d\n", __func__, desc->Version);
740 	dev_dbg(dev, "%s - Cpu/Board      0x%x\n", __func__, desc->CpuRev_BoardRev);
741 	dev_dbg(dev, "%s - NumPorts         %d\n", __func__, desc->NumPorts);
742 	dev_dbg(dev, "%s - NumVirtualPorts  %d\n", __func__, desc->NumVirtualPorts);
743 	dev_dbg(dev, "%s - TotalPorts       %d\n", __func__, desc->TotalPorts);
744 
745 exit:
746 	kfree(rom_desc);
747 	return status;
748 }
749 
750 /* Build firmware header used for firmware update */
751 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
752 {
753 	__u8 *buffer;
754 	int buffer_size;
755 	int i;
756 	int err;
757 	__u8 cs = 0;
758 	struct ti_i2c_desc *i2c_header;
759 	struct ti_i2c_image_header *img_header;
760 	struct ti_i2c_firmware_rec *firmware_rec;
761 	const struct firmware *fw;
762 	const char *fw_name = "edgeport/down3.bin";
763 
764 	/* In order to update the I2C firmware we must change the type 2 record
765 	 * to type 0xF2.  This will force the UMP to come up in Boot Mode.
766 	 * Then while in boot mode, the driver will download the latest
767 	 * firmware (padded to 15.5k) into the UMP ram.  And finally when the
768 	 * device comes back up in download mode the driver will cause the new
769 	 * firmware to be copied from the UMP Ram to I2C and the firmware will
770 	 * update the record type from 0xf2 to 0x02.
771 	 */
772 
773 	/* Allocate a 15.5k buffer + 2 bytes for version number
774 	 * (Firmware Record) */
775 	buffer_size = (((1024 * 16) - 512 ) +
776 			sizeof(struct ti_i2c_firmware_rec));
777 
778 	buffer = kmalloc(buffer_size, GFP_KERNEL);
779 	if (!buffer)
780 		return -ENOMEM;
781 
782 	// Set entire image of 0xffs
783 	memset(buffer, 0xff, buffer_size);
784 
785 	err = request_firmware(&fw, fw_name, dev);
786 	if (err) {
787 		dev_err(dev, "Failed to load image \"%s\" err %d\n",
788 			fw_name, err);
789 		kfree(buffer);
790 		return err;
791 	}
792 
793 	/* Save Download Version Number */
794 	OperationalMajorVersion = fw->data[0];
795 	OperationalMinorVersion = fw->data[1];
796 	OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
797 
798 	/* Copy version number into firmware record */
799 	firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
800 
801 	firmware_rec->Ver_Major	= OperationalMajorVersion;
802 	firmware_rec->Ver_Minor	= OperationalMinorVersion;
803 
804 	/* Pointer to fw_down memory image */
805 	img_header = (struct ti_i2c_image_header *)&fw->data[4];
806 
807 	memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
808 		&fw->data[4 + sizeof(struct ti_i2c_image_header)],
809 		le16_to_cpu(img_header->Length));
810 
811 	release_firmware(fw);
812 
813 	for (i=0; i < buffer_size; i++) {
814 		cs = (__u8)(cs + buffer[i]);
815 	}
816 
817 	kfree(buffer);
818 
819 	/* Build new header */
820 	i2c_header =  (struct ti_i2c_desc *)header;
821 	firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
822 
823 	i2c_header->Type	= I2C_DESC_TYPE_FIRMWARE_BLANK;
824 	i2c_header->Size	= cpu_to_le16(buffer_size);
825 	i2c_header->CheckSum	= cs;
826 	firmware_rec->Ver_Major	= OperationalMajorVersion;
827 	firmware_rec->Ver_Minor	= OperationalMinorVersion;
828 
829 	return 0;
830 }
831 
832 /* Try to figure out what type of I2c we have */
833 static int i2c_type_bootmode(struct edgeport_serial *serial)
834 {
835 	struct device *dev = &serial->serial->dev->dev;
836 	int status;
837 	u8 *data;
838 
839 	data = kmalloc(1, GFP_KERNEL);
840 	if (!data)
841 		return -ENOMEM;
842 
843 	/* Try to read type 2 */
844 	status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
845 				DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
846 	if (status)
847 		dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
848 	else
849 		dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
850 	if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
851 		dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
852 		serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
853 		goto out;
854 	}
855 
856 	/* Try to read type 3 */
857 	status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
858 				DTK_ADDR_SPACE_I2C_TYPE_III, 0,	data, 0x01);
859 	if (status)
860 		dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
861 	else
862 		dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
863 	if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
864 		dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
865 		serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
866 		goto out;
867 	}
868 
869 	dev_dbg(dev, "%s - Unknown\n", __func__);
870 	serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
871 	status = -ENODEV;
872 out:
873 	kfree(data);
874 	return status;
875 }
876 
877 static int bulk_xfer(struct usb_serial *serial, void *buffer,
878 						int length, int *num_sent)
879 {
880 	int status;
881 
882 	status = usb_bulk_msg(serial->dev,
883 			usb_sndbulkpipe(serial->dev,
884 				serial->port[0]->bulk_out_endpointAddress),
885 			buffer, length, num_sent, 1000);
886 	return status;
887 }
888 
889 /* Download given firmware image to the device (IN BOOT MODE) */
890 static int download_code(struct edgeport_serial *serial, __u8 *image,
891 							int image_length)
892 {
893 	int status = 0;
894 	int pos;
895 	int transfer;
896 	int done;
897 
898 	/* Transfer firmware image */
899 	for (pos = 0; pos < image_length; ) {
900 		/* Read the next buffer from file */
901 		transfer = image_length - pos;
902 		if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
903 			transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
904 
905 		/* Transfer data */
906 		status = bulk_xfer(serial->serial, &image[pos],
907 							transfer, &done);
908 		if (status)
909 			break;
910 		/* Advance buffer pointer */
911 		pos += done;
912 	}
913 
914 	return status;
915 }
916 
917 /* FIXME!!! */
918 static int config_boot_dev(struct usb_device *dev)
919 {
920 	return 0;
921 }
922 
923 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
924 {
925 	return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
926 }
927 
928 /**
929  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
930  *
931  * This routine downloads the main operating code into the TI5052, using the
932  * boot code already burned into E2PROM or ROM.
933  */
934 static int download_fw(struct edgeport_serial *serial)
935 {
936 	struct device *dev = &serial->serial->dev->dev;
937 	int status = 0;
938 	int start_address;
939 	struct edge_ti_manuf_descriptor *ti_manuf_desc;
940 	struct usb_interface_descriptor *interface;
941 	int download_cur_ver;
942 	int download_new_ver;
943 
944 	/* This routine is entered by both the BOOT mode and the Download mode
945 	 * We can determine which code is running by the reading the config
946 	 * descriptor and if we have only one bulk pipe it is in boot mode
947 	 */
948 	serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
949 
950 	/* Default to type 2 i2c */
951 	serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
952 
953 	status = choose_config(serial->serial->dev);
954 	if (status)
955 		return status;
956 
957 	interface = &serial->serial->interface->cur_altsetting->desc;
958 	if (!interface) {
959 		dev_err(dev, "%s - no interface set, error!\n", __func__);
960 		return -ENODEV;
961 	}
962 
963 	/*
964 	 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
965 	 * if we have more than one endpoint we are definitely in download
966 	 * mode
967 	 */
968 	if (interface->bNumEndpoints > 1)
969 		serial->product_info.TiMode = TI_MODE_DOWNLOAD;
970 	else
971 		/* Otherwise we will remain in configuring mode */
972 		serial->product_info.TiMode = TI_MODE_CONFIGURING;
973 
974 	/********************************************************************/
975 	/* Download Mode */
976 	/********************************************************************/
977 	if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
978 		struct ti_i2c_desc *rom_desc;
979 
980 		dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
981 
982 		status = check_i2c_image(serial);
983 		if (status) {
984 			dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
985 			return status;
986 		}
987 
988 		/* Validate Hardware version number
989 		 * Read Manufacturing Descriptor from TI Based Edgeport
990 		 */
991 		ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
992 		if (!ti_manuf_desc)
993 			return -ENOMEM;
994 
995 		status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
996 		if (status) {
997 			kfree(ti_manuf_desc);
998 			return status;
999 		}
1000 
1001 		/* Check version number of ION descriptor */
1002 		if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1003 			dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1004 				__func__, ti_cpu_rev(ti_manuf_desc));
1005 			kfree(ti_manuf_desc);
1006 			return -EINVAL;
1007   		}
1008 
1009 		rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1010 		if (!rom_desc) {
1011 			kfree(ti_manuf_desc);
1012 			return -ENOMEM;
1013 		}
1014 
1015 		/* Search for type 2 record (firmware record) */
1016 		start_address = get_descriptor_addr(serial,
1017 				I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1018 		if (start_address != 0) {
1019 			struct ti_i2c_firmware_rec *firmware_version;
1020 			u8 *record;
1021 
1022 			dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n", __func__);
1023 
1024 			firmware_version = kmalloc(sizeof(*firmware_version),
1025 								GFP_KERNEL);
1026 			if (!firmware_version) {
1027 				kfree(rom_desc);
1028 				kfree(ti_manuf_desc);
1029 				return -ENOMEM;
1030 			}
1031 
1032 			/* Validate version number
1033 			 * Read the descriptor data
1034 			 */
1035 			status = read_rom(serial, start_address +
1036 					sizeof(struct ti_i2c_desc),
1037 					sizeof(struct ti_i2c_firmware_rec),
1038 					(__u8 *)firmware_version);
1039 			if (status) {
1040 				kfree(firmware_version);
1041 				kfree(rom_desc);
1042 				kfree(ti_manuf_desc);
1043 				return status;
1044 			}
1045 
1046 			/* Check version number of download with current
1047 			   version in I2c */
1048 			download_cur_ver = (firmware_version->Ver_Major << 8) +
1049 					   (firmware_version->Ver_Minor);
1050 			download_new_ver = (OperationalMajorVersion << 8) +
1051 					   (OperationalMinorVersion);
1052 
1053 			dev_dbg(dev, "%s - >> FW Versions Device %d.%d  Driver %d.%d\n",
1054 				__func__, firmware_version->Ver_Major,
1055 				firmware_version->Ver_Minor,
1056 				OperationalMajorVersion,
1057 				OperationalMinorVersion);
1058 
1059 			/* Check if we have an old version in the I2C and
1060 			   update if necessary */
1061 			if (download_cur_ver < download_new_ver) {
1062 				dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1063 					__func__,
1064 					firmware_version->Ver_Major,
1065 					firmware_version->Ver_Minor,
1066 					OperationalMajorVersion,
1067 					OperationalMinorVersion);
1068 
1069 				record = kmalloc(1, GFP_KERNEL);
1070 				if (!record) {
1071 					kfree(firmware_version);
1072 					kfree(rom_desc);
1073 					kfree(ti_manuf_desc);
1074 					return -ENOMEM;
1075 				}
1076 				/* In order to update the I2C firmware we must
1077 				 * change the type 2 record to type 0xF2. This
1078 				 * will force the UMP to come up in Boot Mode.
1079 				 * Then while in boot mode, the driver will
1080 				 * download the latest firmware (padded to
1081 				 * 15.5k) into the UMP ram. Finally when the
1082 				 * device comes back up in download mode the
1083 				 * driver will cause the new firmware to be
1084 				 * copied from the UMP Ram to I2C and the
1085 				 * firmware will update the record type from
1086 				 * 0xf2 to 0x02.
1087 				 */
1088 				*record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1089 
1090 				/* Change the I2C Firmware record type to
1091 				   0xf2 to trigger an update */
1092 				status = write_rom(serial, start_address,
1093 						sizeof(*record), record);
1094 				if (status) {
1095 					kfree(record);
1096 					kfree(firmware_version);
1097 					kfree(rom_desc);
1098 					kfree(ti_manuf_desc);
1099 					return status;
1100 				}
1101 
1102 				/* verify the write -- must do this in order
1103 				 * for write to complete before we do the
1104 				 * hardware reset
1105 				 */
1106 				status = read_rom(serial,
1107 							start_address,
1108 							sizeof(*record),
1109 							record);
1110 				if (status) {
1111 					kfree(record);
1112 					kfree(firmware_version);
1113 					kfree(rom_desc);
1114 					kfree(ti_manuf_desc);
1115 					return status;
1116 				}
1117 
1118 				if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1119 					dev_err(dev, "%s - error resetting device\n", __func__);
1120 					kfree(record);
1121 					kfree(firmware_version);
1122 					kfree(rom_desc);
1123 					kfree(ti_manuf_desc);
1124 					return -ENODEV;
1125 				}
1126 
1127 				dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1128 
1129 				/* Reset UMP -- Back to BOOT MODE */
1130 				status = ti_vsend_sync(serial->serial->dev,
1131 						UMPC_HARDWARE_RESET,
1132 						0, 0, NULL, 0);
1133 
1134 				dev_dbg(dev, "%s - HARDWARE RESET return %d\n", __func__, status);
1135 
1136 				/* return an error on purpose. */
1137 				kfree(record);
1138 				kfree(firmware_version);
1139 				kfree(rom_desc);
1140 				kfree(ti_manuf_desc);
1141 				return -ENODEV;
1142 			}
1143 			kfree(firmware_version);
1144 		}
1145 		/* Search for type 0xF2 record (firmware blank record) */
1146 		else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1147 #define HEADER_SIZE	(sizeof(struct ti_i2c_desc) + \
1148 					sizeof(struct ti_i2c_firmware_rec))
1149 			__u8 *header;
1150 			__u8 *vheader;
1151 
1152 			header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1153 			if (!header) {
1154 				kfree(rom_desc);
1155 				kfree(ti_manuf_desc);
1156 				return -ENOMEM;
1157 			}
1158 
1159 			vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1160 			if (!vheader) {
1161 				kfree(header);
1162 				kfree(rom_desc);
1163 				kfree(ti_manuf_desc);
1164 				return -ENOMEM;
1165 			}
1166 
1167 			dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n", __func__);
1168 
1169 			/*
1170 			 * In order to update the I2C firmware we must change
1171 			 * the type 2 record to type 0xF2. This will force the
1172 			 * UMP to come up in Boot Mode.  Then while in boot
1173 			 * mode, the driver will download the latest firmware
1174 			 * (padded to 15.5k) into the UMP ram. Finally when the
1175 			 * device comes back up in download mode the driver
1176 			 * will cause the new firmware to be copied from the
1177 			 * UMP Ram to I2C and the firmware will update the
1178 			 * record type from 0xf2 to 0x02.
1179 			 */
1180 			status = build_i2c_fw_hdr(header, dev);
1181 			if (status) {
1182 				kfree(vheader);
1183 				kfree(header);
1184 				kfree(rom_desc);
1185 				kfree(ti_manuf_desc);
1186 				return -EINVAL;
1187 			}
1188 
1189 			/* Update I2C with type 0xf2 record with correct
1190 			   size and checksum */
1191 			status = write_rom(serial,
1192 						start_address,
1193 						HEADER_SIZE,
1194 						header);
1195 			if (status) {
1196 				kfree(vheader);
1197 				kfree(header);
1198 				kfree(rom_desc);
1199 				kfree(ti_manuf_desc);
1200 				return -EINVAL;
1201 			}
1202 
1203 			/* verify the write -- must do this in order for
1204 			   write to complete before we do the hardware reset */
1205 			status = read_rom(serial, start_address,
1206 							HEADER_SIZE, vheader);
1207 
1208 			if (status) {
1209 				dev_dbg(dev, "%s - can't read header back\n", __func__);
1210 				kfree(vheader);
1211 				kfree(header);
1212 				kfree(rom_desc);
1213 				kfree(ti_manuf_desc);
1214 				return status;
1215 			}
1216 			if (memcmp(vheader, header, HEADER_SIZE)) {
1217 				dev_dbg(dev, "%s - write download record failed\n", __func__);
1218 				kfree(vheader);
1219 				kfree(header);
1220 				kfree(rom_desc);
1221 				kfree(ti_manuf_desc);
1222 				return -EINVAL;
1223 			}
1224 
1225 			kfree(vheader);
1226 			kfree(header);
1227 
1228 			dev_dbg(dev, "%s - Start firmware update\n", __func__);
1229 
1230 			/* Tell firmware to copy download image into I2C */
1231 			status = ti_vsend_sync(serial->serial->dev,
1232 					UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1233 
1234 		  	dev_dbg(dev, "%s - Update complete 0x%x\n", __func__, status);
1235 			if (status) {
1236 				dev_err(dev,
1237 					"%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1238 								__func__);
1239 				kfree(rom_desc);
1240 				kfree(ti_manuf_desc);
1241 				return status;
1242 			}
1243 		}
1244 
1245 		// The device is running the download code
1246 		kfree(rom_desc);
1247 		kfree(ti_manuf_desc);
1248 		return 0;
1249 	}
1250 
1251 	/********************************************************************/
1252 	/* Boot Mode */
1253 	/********************************************************************/
1254 	dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1255 
1256 	/* Configure the TI device so we can use the BULK pipes for download */
1257 	status = config_boot_dev(serial->serial->dev);
1258 	if (status)
1259 		return status;
1260 
1261 	if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1262 							!= USB_VENDOR_ID_ION) {
1263 		dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1264 			le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1265 		serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1266 		goto stayinbootmode;
1267 	}
1268 
1269 	/* We have an ION device (I2c Must be programmed)
1270 	   Determine I2C image type */
1271 	if (i2c_type_bootmode(serial))
1272 		goto stayinbootmode;
1273 
1274 	/* Check for ION Vendor ID and that the I2C is valid */
1275 	if (!check_i2c_image(serial)) {
1276 		struct ti_i2c_image_header *header;
1277 		int i;
1278 		__u8 cs = 0;
1279 		__u8 *buffer;
1280 		int buffer_size;
1281 		int err;
1282 		const struct firmware *fw;
1283 		const char *fw_name = "edgeport/down3.bin";
1284 
1285 		/* Validate Hardware version number
1286 		 * Read Manufacturing Descriptor from TI Based Edgeport
1287 		 */
1288 		ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1289 		if (!ti_manuf_desc)
1290 			return -ENOMEM;
1291 
1292 		status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1293 		if (status) {
1294 			kfree(ti_manuf_desc);
1295 			goto stayinbootmode;
1296 		}
1297 
1298 		/* Check for version 2 */
1299 		if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1300 			dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1301 				__func__, ti_cpu_rev(ti_manuf_desc));
1302 			kfree(ti_manuf_desc);
1303 			goto stayinbootmode;
1304 		}
1305 
1306 		kfree(ti_manuf_desc);
1307 
1308 		/*
1309 		 * In order to update the I2C firmware we must change the type
1310 		 * 2 record to type 0xF2. This will force the UMP to come up
1311 		 * in Boot Mode.  Then while in boot mode, the driver will
1312 		 * download the latest firmware (padded to 15.5k) into the
1313 		 * UMP ram. Finally when the device comes back up in download
1314 		 * mode the driver will cause the new firmware to be copied
1315 		 * from the UMP Ram to I2C and the firmware will update the
1316 		 * record type from 0xf2 to 0x02.
1317 		 *
1318 		 * Do we really have to copy the whole firmware image,
1319 		 * or could we do this in place!
1320 		 */
1321 
1322 		/* Allocate a 15.5k buffer + 3 byte header */
1323 		buffer_size = (((1024 * 16) - 512) +
1324 					sizeof(struct ti_i2c_image_header));
1325 		buffer = kmalloc(buffer_size, GFP_KERNEL);
1326 		if (!buffer)
1327 			return -ENOMEM;
1328 
1329 		/* Initialize the buffer to 0xff (pad the buffer) */
1330 		memset(buffer, 0xff, buffer_size);
1331 
1332 		err = request_firmware(&fw, fw_name, dev);
1333 		if (err) {
1334 			dev_err(dev, "Failed to load image \"%s\" err %d\n",
1335 				fw_name, err);
1336 			kfree(buffer);
1337 			return err;
1338 		}
1339 		memcpy(buffer, &fw->data[4], fw->size - 4);
1340 		release_firmware(fw);
1341 
1342 		for (i = sizeof(struct ti_i2c_image_header);
1343 				i < buffer_size; i++) {
1344 			cs = (__u8)(cs + buffer[i]);
1345 		}
1346 
1347 		header = (struct ti_i2c_image_header *)buffer;
1348 
1349 		/* update length and checksum after padding */
1350 		header->Length 	 = cpu_to_le16((__u16)(buffer_size -
1351 					sizeof(struct ti_i2c_image_header)));
1352 		header->CheckSum = cs;
1353 
1354 		/* Download the operational code  */
1355 		dev_dbg(dev, "%s - Downloading operational code image (TI UMP)\n", __func__);
1356 		status = download_code(serial, buffer, buffer_size);
1357 
1358 		kfree(buffer);
1359 
1360 		if (status) {
1361 			dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1362 			return status;
1363 		}
1364 
1365 		/* Device will reboot */
1366 		serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1367 
1368 		dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1369 
1370 		/* return an error on purpose */
1371 		return -ENODEV;
1372 	}
1373 
1374 stayinbootmode:
1375 	/* Eprom is invalid or blank stay in boot mode */
1376 	dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1377 	serial->product_info.TiMode = TI_MODE_BOOT;
1378 
1379 	return 0;
1380 }
1381 
1382 
1383 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1384 {
1385 	int port_number = port->port->port_number;
1386 
1387 	on = !!on;	/* 1 or 0 not bitmask */
1388 	return send_cmd(port->port->serial->dev,
1389 			feature, (__u8)(UMPM_UART1_PORT + port_number),
1390 			on, NULL, 0);
1391 }
1392 
1393 
1394 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1395 {
1396 	int status = 0;
1397 
1398 	dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1399 
1400 	status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1401 	if (status)
1402 		return status;
1403 	status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1404 	if (status)
1405 		return status;
1406 	return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1407 }
1408 
1409 /* Convert TI LSR to standard UART flags */
1410 static __u8 map_line_status(__u8 ti_lsr)
1411 {
1412 	__u8 lsr = 0;
1413 
1414 #define MAP_FLAG(flagUmp, flagUart)    \
1415 	if (ti_lsr & flagUmp) \
1416 		lsr |= flagUart;
1417 
1418 	MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)	/* overrun */
1419 	MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)	/* parity error */
1420 	MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)	/* framing error */
1421 	MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)	/* break detected */
1422 	MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)	/* rx data available */
1423 	MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)	/* tx hold reg empty */
1424 
1425 #undef MAP_FLAG
1426 
1427 	return lsr;
1428 }
1429 
1430 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1431 {
1432 	struct async_icount *icount;
1433 	struct tty_struct *tty;
1434 
1435 	dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1436 
1437 	if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1438 			EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1439 		icount = &edge_port->port->icount;
1440 
1441 		/* update input line counters */
1442 		if (msr & EDGEPORT_MSR_DELTA_CTS)
1443 			icount->cts++;
1444 		if (msr & EDGEPORT_MSR_DELTA_DSR)
1445 			icount->dsr++;
1446 		if (msr & EDGEPORT_MSR_DELTA_CD)
1447 			icount->dcd++;
1448 		if (msr & EDGEPORT_MSR_DELTA_RI)
1449 			icount->rng++;
1450 		wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1451 	}
1452 
1453 	/* Save the new modem status */
1454 	edge_port->shadow_msr = msr & 0xf0;
1455 
1456 	tty = tty_port_tty_get(&edge_port->port->port);
1457 	/* handle CTS flow control */
1458 	if (tty && C_CRTSCTS(tty)) {
1459 		if (msr & EDGEPORT_MSR_CTS)
1460 			tty_wakeup(tty);
1461 	}
1462 	tty_kref_put(tty);
1463 }
1464 
1465 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1466 							__u8 lsr, __u8 data)
1467 {
1468 	struct async_icount *icount;
1469 	__u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1470 						LSR_FRM_ERR | LSR_BREAK));
1471 
1472 	dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1473 
1474 	edge_port->shadow_lsr = lsr;
1475 
1476 	if (new_lsr & LSR_BREAK)
1477 		/*
1478 		 * Parity and Framing errors only count if they
1479 		 * occur exclusive of a break being received.
1480 		 */
1481 		new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1482 
1483 	/* Place LSR data byte into Rx buffer */
1484 	if (lsr_data)
1485 		edge_tty_recv(edge_port->port, &data, 1);
1486 
1487 	/* update input line counters */
1488 	icount = &edge_port->port->icount;
1489 	if (new_lsr & LSR_BREAK)
1490 		icount->brk++;
1491 	if (new_lsr & LSR_OVER_ERR)
1492 		icount->overrun++;
1493 	if (new_lsr & LSR_PAR_ERR)
1494 		icount->parity++;
1495 	if (new_lsr & LSR_FRM_ERR)
1496 		icount->frame++;
1497 }
1498 
1499 
1500 static void edge_interrupt_callback(struct urb *urb)
1501 {
1502 	struct edgeport_serial *edge_serial = urb->context;
1503 	struct usb_serial_port *port;
1504 	struct edgeport_port *edge_port;
1505 	struct device *dev;
1506 	unsigned char *data = urb->transfer_buffer;
1507 	int length = urb->actual_length;
1508 	int port_number;
1509 	int function;
1510 	int retval;
1511 	__u8 lsr;
1512 	__u8 msr;
1513 	int status = urb->status;
1514 
1515 	switch (status) {
1516 	case 0:
1517 		/* success */
1518 		break;
1519 	case -ECONNRESET:
1520 	case -ENOENT:
1521 	case -ESHUTDOWN:
1522 		/* this urb is terminated, clean up */
1523 		dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1524 		    __func__, status);
1525 		return;
1526 	default:
1527 		dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1528 			"%d\n", __func__, status);
1529 		goto exit;
1530 	}
1531 
1532 	if (!length) {
1533 		dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1534 		goto exit;
1535 	}
1536 
1537 	dev = &edge_serial->serial->dev->dev;
1538 	usb_serial_debug_data(dev, __func__, length, data);
1539 
1540 	if (length != 2) {
1541 		dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1542 		goto exit;
1543 	}
1544 
1545 	port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1546 	function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1547 	dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1548 		port_number, function, data[1]);
1549 	port = edge_serial->serial->port[port_number];
1550 	edge_port = usb_get_serial_port_data(port);
1551 	if (!edge_port) {
1552 		dev_dbg(dev, "%s - edge_port not found\n", __func__);
1553 		return;
1554 	}
1555 	switch (function) {
1556 	case TIUMP_INTERRUPT_CODE_LSR:
1557 		lsr = map_line_status(data[1]);
1558 		if (lsr & UMP_UART_LSR_DATA_MASK) {
1559 			/* Save the LSR event for bulk read
1560 			   completion routine */
1561 			dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1562 				__func__, port_number, lsr);
1563 			edge_port->lsr_event = 1;
1564 			edge_port->lsr_mask = lsr;
1565 		} else {
1566 			dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1567 				__func__, port_number, lsr);
1568 			handle_new_lsr(edge_port, 0, lsr, 0);
1569 		}
1570 		break;
1571 
1572 	case TIUMP_INTERRUPT_CODE_MSR:	/* MSR */
1573 		/* Copy MSR from UMP */
1574 		msr = data[1];
1575 		dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1576 			__func__, port_number, msr);
1577 		handle_new_msr(edge_port, msr);
1578 		break;
1579 
1580 	default:
1581 		dev_err(&urb->dev->dev,
1582 			"%s - Unknown Interrupt code from UMP %x\n",
1583 			__func__, data[1]);
1584 		break;
1585 
1586 	}
1587 
1588 exit:
1589 	retval = usb_submit_urb(urb, GFP_ATOMIC);
1590 	if (retval)
1591 		dev_err(&urb->dev->dev,
1592 			"%s - usb_submit_urb failed with result %d\n",
1593 			 __func__, retval);
1594 }
1595 
1596 static void edge_bulk_in_callback(struct urb *urb)
1597 {
1598 	struct edgeport_port *edge_port = urb->context;
1599 	struct device *dev = &edge_port->port->dev;
1600 	unsigned char *data = urb->transfer_buffer;
1601 	int retval = 0;
1602 	int port_number;
1603 	int status = urb->status;
1604 
1605 	switch (status) {
1606 	case 0:
1607 		/* success */
1608 		break;
1609 	case -ECONNRESET:
1610 	case -ENOENT:
1611 	case -ESHUTDOWN:
1612 		/* this urb is terminated, clean up */
1613 		dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1614 		return;
1615 	default:
1616 		dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1617 	}
1618 
1619 	if (status == -EPIPE)
1620 		goto exit;
1621 
1622 	if (status) {
1623 		dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1624 		return;
1625 	}
1626 
1627 	port_number = edge_port->port->port_number;
1628 
1629 	if (edge_port->lsr_event) {
1630 		edge_port->lsr_event = 0;
1631 		dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1632 			__func__, port_number, edge_port->lsr_mask, *data);
1633 		handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1634 		/* Adjust buffer length/pointer */
1635 		--urb->actual_length;
1636 		++data;
1637 	}
1638 
1639 	if (urb->actual_length) {
1640 		usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1641 		if (edge_port->close_pending)
1642 			dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1643 								__func__);
1644 		else
1645 			edge_tty_recv(edge_port->port, data,
1646 					urb->actual_length);
1647 		edge_port->port->icount.rx += urb->actual_length;
1648 	}
1649 
1650 exit:
1651 	/* continue read unless stopped */
1652 	spin_lock(&edge_port->ep_lock);
1653 	if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1654 		retval = usb_submit_urb(urb, GFP_ATOMIC);
1655 	else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1656 		edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1657 
1658 	spin_unlock(&edge_port->ep_lock);
1659 	if (retval)
1660 		dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1661 }
1662 
1663 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1664 		int length)
1665 {
1666 	int queued;
1667 
1668 	queued = tty_insert_flip_string(&port->port, data, length);
1669 	if (queued < length)
1670 		dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1671 			__func__, length - queued);
1672 	tty_flip_buffer_push(&port->port);
1673 }
1674 
1675 static void edge_bulk_out_callback(struct urb *urb)
1676 {
1677 	struct usb_serial_port *port = urb->context;
1678 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1679 	int status = urb->status;
1680 	struct tty_struct *tty;
1681 
1682 	edge_port->ep_write_urb_in_use = 0;
1683 
1684 	switch (status) {
1685 	case 0:
1686 		/* success */
1687 		break;
1688 	case -ECONNRESET:
1689 	case -ENOENT:
1690 	case -ESHUTDOWN:
1691 		/* this urb is terminated, clean up */
1692 		dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1693 		    __func__, status);
1694 		return;
1695 	default:
1696 		dev_err_console(port, "%s - nonzero write bulk status "
1697 			"received: %d\n", __func__, status);
1698 	}
1699 
1700 	/* send any buffered data */
1701 	tty = tty_port_tty_get(&port->port);
1702 	edge_send(port, tty);
1703 	tty_kref_put(tty);
1704 }
1705 
1706 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1707 {
1708 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1709 	struct edgeport_serial *edge_serial;
1710 	struct usb_device *dev;
1711 	struct urb *urb;
1712 	int port_number;
1713 	int status;
1714 	u16 open_settings;
1715 	u8 transaction_timeout;
1716 
1717 	if (edge_port == NULL)
1718 		return -ENODEV;
1719 
1720 	port_number = port->port_number;
1721 
1722 	dev = port->serial->dev;
1723 
1724 	/* turn off loopback */
1725 	status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1726 	if (status) {
1727 		dev_err(&port->dev,
1728 				"%s - cannot send clear loopback command, %d\n",
1729 			__func__, status);
1730 		return status;
1731 	}
1732 
1733 	/* set up the port settings */
1734 	if (tty)
1735 		edge_set_termios(tty, port, &tty->termios);
1736 
1737 	/* open up the port */
1738 
1739 	/* milliseconds to timeout for DMA transfer */
1740 	transaction_timeout = 2;
1741 
1742 	edge_port->ump_read_timeout =
1743 				max(20, ((transaction_timeout * 3) / 2));
1744 
1745 	/* milliseconds to timeout for DMA transfer */
1746 	open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1747 			     UMP_PIPE_TRANS_TIMEOUT_ENA |
1748 			     (transaction_timeout << 2));
1749 
1750 	dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1751 
1752 	/* Tell TI to open and start the port */
1753 	status = send_cmd(dev, UMPC_OPEN_PORT,
1754 		(u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1755 	if (status) {
1756 		dev_err(&port->dev, "%s - cannot send open command, %d\n",
1757 							__func__, status);
1758 		return status;
1759 	}
1760 
1761 	/* Start the DMA? */
1762 	status = send_cmd(dev, UMPC_START_PORT,
1763 		(u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1764 	if (status) {
1765 		dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1766 							__func__, status);
1767 		return status;
1768 	}
1769 
1770 	/* Clear TX and RX buffers in UMP */
1771 	status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1772 	if (status) {
1773 		dev_err(&port->dev,
1774 			"%s - cannot send clear buffers command, %d\n",
1775 			__func__, status);
1776 		return status;
1777 	}
1778 
1779 	/* Read Initial MSR */
1780 	status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1781 				(__u16)(UMPM_UART1_PORT + port_number),
1782 				&edge_port->shadow_msr, 1);
1783 	if (status) {
1784 		dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1785 							__func__, status);
1786 		return status;
1787 	}
1788 
1789 	dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1790 
1791 	/* Set Initial MCR */
1792 	edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1793 	dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1794 
1795 	edge_serial = edge_port->edge_serial;
1796 	if (mutex_lock_interruptible(&edge_serial->es_lock))
1797 		return -ERESTARTSYS;
1798 	if (edge_serial->num_ports_open == 0) {
1799 		/* we are the first port to open, post the interrupt urb */
1800 		urb = edge_serial->serial->port[0]->interrupt_in_urb;
1801 		if (!urb) {
1802 			dev_err(&port->dev,
1803 				"%s - no interrupt urb present, exiting\n",
1804 				__func__);
1805 			status = -EINVAL;
1806 			goto release_es_lock;
1807 		}
1808 		urb->context = edge_serial;
1809 		status = usb_submit_urb(urb, GFP_KERNEL);
1810 		if (status) {
1811 			dev_err(&port->dev,
1812 				"%s - usb_submit_urb failed with value %d\n",
1813 					__func__, status);
1814 			goto release_es_lock;
1815 		}
1816 	}
1817 
1818 	/*
1819 	 * reset the data toggle on the bulk endpoints to work around bug in
1820 	 * host controllers where things get out of sync some times
1821 	 */
1822 	usb_clear_halt(dev, port->write_urb->pipe);
1823 	usb_clear_halt(dev, port->read_urb->pipe);
1824 
1825 	/* start up our bulk read urb */
1826 	urb = port->read_urb;
1827 	if (!urb) {
1828 		dev_err(&port->dev, "%s - no read urb present, exiting\n",
1829 								__func__);
1830 		status = -EINVAL;
1831 		goto unlink_int_urb;
1832 	}
1833 	edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1834 	urb->context = edge_port;
1835 	status = usb_submit_urb(urb, GFP_KERNEL);
1836 	if (status) {
1837 		dev_err(&port->dev,
1838 			"%s - read bulk usb_submit_urb failed with value %d\n",
1839 				__func__, status);
1840 		goto unlink_int_urb;
1841 	}
1842 
1843 	++edge_serial->num_ports_open;
1844 
1845 	goto release_es_lock;
1846 
1847 unlink_int_urb:
1848 	if (edge_port->edge_serial->num_ports_open == 0)
1849 		usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1850 release_es_lock:
1851 	mutex_unlock(&edge_serial->es_lock);
1852 	return status;
1853 }
1854 
1855 static void edge_close(struct usb_serial_port *port)
1856 {
1857 	struct edgeport_serial *edge_serial;
1858 	struct edgeport_port *edge_port;
1859 	struct usb_serial *serial = port->serial;
1860 	unsigned long flags;
1861 	int port_number;
1862 
1863 	edge_serial = usb_get_serial_data(port->serial);
1864 	edge_port = usb_get_serial_port_data(port);
1865 	if (edge_serial == NULL || edge_port == NULL)
1866 		return;
1867 
1868 	/* The bulkreadcompletion routine will check
1869 	 * this flag and dump add read data */
1870 	edge_port->close_pending = 1;
1871 
1872 	usb_kill_urb(port->read_urb);
1873 	usb_kill_urb(port->write_urb);
1874 	edge_port->ep_write_urb_in_use = 0;
1875 	spin_lock_irqsave(&edge_port->ep_lock, flags);
1876 	kfifo_reset_out(&port->write_fifo);
1877 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1878 
1879 	dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
1880 	port_number = port->port_number;
1881 	send_cmd(serial->dev, UMPC_CLOSE_PORT,
1882 		     (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1883 
1884 	mutex_lock(&edge_serial->es_lock);
1885 	--edge_port->edge_serial->num_ports_open;
1886 	if (edge_port->edge_serial->num_ports_open <= 0) {
1887 		/* last port is now closed, let's shut down our interrupt urb */
1888 		usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1889 		edge_port->edge_serial->num_ports_open = 0;
1890 	}
1891 	mutex_unlock(&edge_serial->es_lock);
1892 	edge_port->close_pending = 0;
1893 }
1894 
1895 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1896 				const unsigned char *data, int count)
1897 {
1898 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1899 
1900 	if (count == 0) {
1901 		dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
1902 		return 0;
1903 	}
1904 
1905 	if (edge_port == NULL)
1906 		return -ENODEV;
1907 	if (edge_port->close_pending == 1)
1908 		return -ENODEV;
1909 
1910 	count = kfifo_in_locked(&port->write_fifo, data, count,
1911 							&edge_port->ep_lock);
1912 	edge_send(port, tty);
1913 
1914 	return count;
1915 }
1916 
1917 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
1918 {
1919 	int count, result;
1920 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1921 	unsigned long flags;
1922 
1923 	spin_lock_irqsave(&edge_port->ep_lock, flags);
1924 
1925 	if (edge_port->ep_write_urb_in_use) {
1926 		spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1927 		return;
1928 	}
1929 
1930 	count = kfifo_out(&port->write_fifo,
1931 				port->write_urb->transfer_buffer,
1932 				port->bulk_out_size);
1933 
1934 	if (count == 0) {
1935 		spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1936 		return;
1937 	}
1938 
1939 	edge_port->ep_write_urb_in_use = 1;
1940 
1941 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1942 
1943 	usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
1944 
1945 	/* set up our urb */
1946 	port->write_urb->transfer_buffer_length = count;
1947 
1948 	/* send the data out the bulk port */
1949 	result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1950 	if (result) {
1951 		dev_err_console(port,
1952 			"%s - failed submitting write urb, error %d\n",
1953 				__func__, result);
1954 		edge_port->ep_write_urb_in_use = 0;
1955 		/* TODO: reschedule edge_send */
1956 	} else
1957 		edge_port->port->icount.tx += count;
1958 
1959 	/* wakeup any process waiting for writes to complete */
1960 	/* there is now more room in the buffer for new writes */
1961 	if (tty)
1962 		tty_wakeup(tty);
1963 }
1964 
1965 static int edge_write_room(struct tty_struct *tty)
1966 {
1967 	struct usb_serial_port *port = tty->driver_data;
1968 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1969 	int room = 0;
1970 	unsigned long flags;
1971 
1972 	if (edge_port == NULL)
1973 		return 0;
1974 	if (edge_port->close_pending == 1)
1975 		return 0;
1976 
1977 	spin_lock_irqsave(&edge_port->ep_lock, flags);
1978 	room = kfifo_avail(&port->write_fifo);
1979 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1980 
1981 	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1982 	return room;
1983 }
1984 
1985 static int edge_chars_in_buffer(struct tty_struct *tty)
1986 {
1987 	struct usb_serial_port *port = tty->driver_data;
1988 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1989 	int chars = 0;
1990 	unsigned long flags;
1991 	if (edge_port == NULL)
1992 		return 0;
1993 
1994 	spin_lock_irqsave(&edge_port->ep_lock, flags);
1995 	chars = kfifo_len(&port->write_fifo);
1996 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1997 
1998 	dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1999 	return chars;
2000 }
2001 
2002 static bool edge_tx_empty(struct usb_serial_port *port)
2003 {
2004 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2005 	int ret;
2006 
2007 	ret = tx_active(edge_port);
2008 	if (ret > 0)
2009 		return false;
2010 
2011 	return true;
2012 }
2013 
2014 static void edge_throttle(struct tty_struct *tty)
2015 {
2016 	struct usb_serial_port *port = tty->driver_data;
2017 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2018 	int status;
2019 
2020 	if (edge_port == NULL)
2021 		return;
2022 
2023 	/* if we are implementing XON/XOFF, send the stop character */
2024 	if (I_IXOFF(tty)) {
2025 		unsigned char stop_char = STOP_CHAR(tty);
2026 		status = edge_write(tty, port, &stop_char, 1);
2027 		if (status <= 0) {
2028 			dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2029 		}
2030 	}
2031 
2032 	/* if we are implementing RTS/CTS, stop reads */
2033 	/* and the Edgeport will clear the RTS line */
2034 	if (C_CRTSCTS(tty))
2035 		stop_read(edge_port);
2036 
2037 }
2038 
2039 static void edge_unthrottle(struct tty_struct *tty)
2040 {
2041 	struct usb_serial_port *port = tty->driver_data;
2042 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2043 	int status;
2044 
2045 	if (edge_port == NULL)
2046 		return;
2047 
2048 	/* if we are implementing XON/XOFF, send the start character */
2049 	if (I_IXOFF(tty)) {
2050 		unsigned char start_char = START_CHAR(tty);
2051 		status = edge_write(tty, port, &start_char, 1);
2052 		if (status <= 0) {
2053 			dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2054 		}
2055 	}
2056 	/* if we are implementing RTS/CTS, restart reads */
2057 	/* are the Edgeport will assert the RTS line */
2058 	if (C_CRTSCTS(tty)) {
2059 		status = restart_read(edge_port);
2060 		if (status)
2061 			dev_err(&port->dev,
2062 				"%s - read bulk usb_submit_urb failed: %d\n",
2063 							__func__, status);
2064 	}
2065 
2066 }
2067 
2068 static void stop_read(struct edgeport_port *edge_port)
2069 {
2070 	unsigned long flags;
2071 
2072 	spin_lock_irqsave(&edge_port->ep_lock, flags);
2073 
2074 	if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2075 		edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2076 	edge_port->shadow_mcr &= ~MCR_RTS;
2077 
2078 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2079 }
2080 
2081 static int restart_read(struct edgeport_port *edge_port)
2082 {
2083 	struct urb *urb;
2084 	int status = 0;
2085 	unsigned long flags;
2086 
2087 	spin_lock_irqsave(&edge_port->ep_lock, flags);
2088 
2089 	if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2090 		urb = edge_port->port->read_urb;
2091 		status = usb_submit_urb(urb, GFP_ATOMIC);
2092 	}
2093 	edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2094 	edge_port->shadow_mcr |= MCR_RTS;
2095 
2096 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2097 
2098 	return status;
2099 }
2100 
2101 static void change_port_settings(struct tty_struct *tty,
2102 		struct edgeport_port *edge_port, struct ktermios *old_termios)
2103 {
2104 	struct device *dev = &edge_port->port->dev;
2105 	struct ump_uart_config *config;
2106 	int baud;
2107 	unsigned cflag;
2108 	int status;
2109 	int port_number = edge_port->port->port_number;
2110 
2111 	config = kmalloc (sizeof (*config), GFP_KERNEL);
2112 	if (!config) {
2113 		tty->termios = *old_termios;
2114 		return;
2115 	}
2116 
2117 	cflag = tty->termios.c_cflag;
2118 
2119 	config->wFlags = 0;
2120 
2121 	/* These flags must be set */
2122 	config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2123 	config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2124 	config->bUartMode = (__u8)(edge_port->bUartMode);
2125 
2126 	switch (cflag & CSIZE) {
2127 	case CS5:
2128 		    config->bDataBits = UMP_UART_CHAR5BITS;
2129 		    dev_dbg(dev, "%s - data bits = 5\n", __func__);
2130 		    break;
2131 	case CS6:
2132 		    config->bDataBits = UMP_UART_CHAR6BITS;
2133 		    dev_dbg(dev, "%s - data bits = 6\n", __func__);
2134 		    break;
2135 	case CS7:
2136 		    config->bDataBits = UMP_UART_CHAR7BITS;
2137 		    dev_dbg(dev, "%s - data bits = 7\n", __func__);
2138 		    break;
2139 	default:
2140 	case CS8:
2141 		    config->bDataBits = UMP_UART_CHAR8BITS;
2142 		    dev_dbg(dev, "%s - data bits = 8\n", __func__);
2143 			    break;
2144 	}
2145 
2146 	if (cflag & PARENB) {
2147 		if (cflag & PARODD) {
2148 			config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2149 			config->bParity = UMP_UART_ODDPARITY;
2150 			dev_dbg(dev, "%s - parity = odd\n", __func__);
2151 		} else {
2152 			config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2153 			config->bParity = UMP_UART_EVENPARITY;
2154 			dev_dbg(dev, "%s - parity = even\n", __func__);
2155 		}
2156 	} else {
2157 		config->bParity = UMP_UART_NOPARITY;
2158 		dev_dbg(dev, "%s - parity = none\n", __func__);
2159 	}
2160 
2161 	if (cflag & CSTOPB) {
2162 		config->bStopBits = UMP_UART_STOPBIT2;
2163 		dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2164 	} else {
2165 		config->bStopBits = UMP_UART_STOPBIT1;
2166 		dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2167 	}
2168 
2169 	/* figure out the flow control settings */
2170 	if (cflag & CRTSCTS) {
2171 		config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2172 		config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2173 		dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2174 	} else {
2175 		dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2176 		restart_read(edge_port);
2177 	}
2178 
2179 	/* if we are implementing XON/XOFF, set the start and stop
2180 	   character in the device */
2181 	config->cXon  = START_CHAR(tty);
2182 	config->cXoff = STOP_CHAR(tty);
2183 
2184 	/* if we are implementing INBOUND XON/XOFF */
2185 	if (I_IXOFF(tty)) {
2186 		config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2187 		dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2188 			__func__, config->cXon, config->cXoff);
2189 	} else
2190 		dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2191 
2192 	/* if we are implementing OUTBOUND XON/XOFF */
2193 	if (I_IXON(tty)) {
2194 		config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2195 		dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2196 			__func__, config->cXon, config->cXoff);
2197 	} else
2198 		dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2199 
2200 	tty->termios.c_cflag &= ~CMSPAR;
2201 
2202 	/* Round the baud rate */
2203 	baud = tty_get_baud_rate(tty);
2204 	if (!baud) {
2205 		/* pick a default, any default... */
2206 		baud = 9600;
2207 	} else
2208 		tty_encode_baud_rate(tty, baud, baud);
2209 
2210 	edge_port->baud_rate = baud;
2211 	config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2212 
2213 	/* FIXME: Recompute actual baud from divisor here */
2214 
2215 	dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2216 
2217 	dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
2218 	dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
2219 	dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
2220 	dev_dbg(dev, "bParity:     %d\n", config->bParity);
2221 	dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
2222 	dev_dbg(dev, "cXon:        %d\n", config->cXon);
2223 	dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
2224 	dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
2225 
2226 	/* move the word values into big endian mode */
2227 	cpu_to_be16s(&config->wFlags);
2228 	cpu_to_be16s(&config->wBaudRate);
2229 
2230 	status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2231 				(__u8)(UMPM_UART1_PORT + port_number),
2232 				0, (__u8 *)config, sizeof(*config));
2233 	if (status)
2234 		dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2235 			__func__, status);
2236 	kfree(config);
2237 }
2238 
2239 static void edge_set_termios(struct tty_struct *tty,
2240 		struct usb_serial_port *port, struct ktermios *old_termios)
2241 {
2242 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2243 	unsigned int cflag;
2244 
2245 	cflag = tty->termios.c_cflag;
2246 
2247 	dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2248 		tty->termios.c_cflag, tty->termios.c_iflag);
2249 	dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2250 		old_termios->c_cflag, old_termios->c_iflag);
2251 
2252 	if (edge_port == NULL)
2253 		return;
2254 	/* change the port settings to the new ones specified */
2255 	change_port_settings(tty, edge_port, old_termios);
2256 }
2257 
2258 static int edge_tiocmset(struct tty_struct *tty,
2259 					unsigned int set, unsigned int clear)
2260 {
2261 	struct usb_serial_port *port = tty->driver_data;
2262 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2263 	unsigned int mcr;
2264 	unsigned long flags;
2265 
2266 	spin_lock_irqsave(&edge_port->ep_lock, flags);
2267 	mcr = edge_port->shadow_mcr;
2268 	if (set & TIOCM_RTS)
2269 		mcr |= MCR_RTS;
2270 	if (set & TIOCM_DTR)
2271 		mcr |= MCR_DTR;
2272 	if (set & TIOCM_LOOP)
2273 		mcr |= MCR_LOOPBACK;
2274 
2275 	if (clear & TIOCM_RTS)
2276 		mcr &= ~MCR_RTS;
2277 	if (clear & TIOCM_DTR)
2278 		mcr &= ~MCR_DTR;
2279 	if (clear & TIOCM_LOOP)
2280 		mcr &= ~MCR_LOOPBACK;
2281 
2282 	edge_port->shadow_mcr = mcr;
2283 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2284 
2285 	restore_mcr(edge_port, mcr);
2286 	return 0;
2287 }
2288 
2289 static int edge_tiocmget(struct tty_struct *tty)
2290 {
2291 	struct usb_serial_port *port = tty->driver_data;
2292 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2293 	unsigned int result = 0;
2294 	unsigned int msr;
2295 	unsigned int mcr;
2296 	unsigned long flags;
2297 
2298 	spin_lock_irqsave(&edge_port->ep_lock, flags);
2299 
2300 	msr = edge_port->shadow_msr;
2301 	mcr = edge_port->shadow_mcr;
2302 	result = ((mcr & MCR_DTR)	? TIOCM_DTR: 0)	  /* 0x002 */
2303 		  | ((mcr & MCR_RTS)	? TIOCM_RTS: 0)   /* 0x004 */
2304 		  | ((msr & EDGEPORT_MSR_CTS)	? TIOCM_CTS: 0)   /* 0x020 */
2305 		  | ((msr & EDGEPORT_MSR_CD)	? TIOCM_CAR: 0)   /* 0x040 */
2306 		  | ((msr & EDGEPORT_MSR_RI)	? TIOCM_RI:  0)   /* 0x080 */
2307 		  | ((msr & EDGEPORT_MSR_DSR)	? TIOCM_DSR: 0);  /* 0x100 */
2308 
2309 
2310 	dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2311 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2312 
2313 	return result;
2314 }
2315 
2316 static int get_serial_info(struct edgeport_port *edge_port,
2317 				struct serial_struct __user *retinfo)
2318 {
2319 	struct serial_struct tmp;
2320 	unsigned cwait;
2321 
2322 	if (!retinfo)
2323 		return -EFAULT;
2324 
2325 	cwait = edge_port->port->port.closing_wait;
2326 	if (cwait != ASYNC_CLOSING_WAIT_NONE)
2327 		cwait = jiffies_to_msecs(cwait) / 10;
2328 
2329 	memset(&tmp, 0, sizeof(tmp));
2330 
2331 	tmp.type		= PORT_16550A;
2332 	tmp.line		= edge_port->port->minor;
2333 	tmp.port		= edge_port->port->port_number;
2334 	tmp.irq			= 0;
2335 	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2336 	tmp.xmit_fifo_size	= edge_port->port->bulk_out_size;
2337 	tmp.baud_base		= 9600;
2338 	tmp.close_delay		= 5*HZ;
2339 	tmp.closing_wait	= cwait;
2340 
2341 	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2342 		return -EFAULT;
2343 	return 0;
2344 }
2345 
2346 static int edge_ioctl(struct tty_struct *tty,
2347 					unsigned int cmd, unsigned long arg)
2348 {
2349 	struct usb_serial_port *port = tty->driver_data;
2350 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2351 
2352 	switch (cmd) {
2353 	case TIOCGSERIAL:
2354 		dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
2355 		return get_serial_info(edge_port,
2356 				(struct serial_struct __user *) arg);
2357 	}
2358 	return -ENOIOCTLCMD;
2359 }
2360 
2361 static void edge_break(struct tty_struct *tty, int break_state)
2362 {
2363 	struct usb_serial_port *port = tty->driver_data;
2364 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2365 	int status;
2366 	int bv = 0;	/* Off */
2367 
2368 	if (break_state == -1)
2369 		bv = 1;	/* On */
2370 	status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2371 	if (status)
2372 		dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2373 			__func__, status);
2374 }
2375 
2376 static int edge_startup(struct usb_serial *serial)
2377 {
2378 	struct edgeport_serial *edge_serial;
2379 	int status;
2380 
2381 	/* create our private serial structure */
2382 	edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2383 	if (!edge_serial)
2384 		return -ENOMEM;
2385 
2386 	mutex_init(&edge_serial->es_lock);
2387 	edge_serial->serial = serial;
2388 	usb_set_serial_data(serial, edge_serial);
2389 
2390 	status = download_fw(edge_serial);
2391 	if (status) {
2392 		kfree(edge_serial);
2393 		return status;
2394 	}
2395 
2396 	return 0;
2397 }
2398 
2399 static void edge_disconnect(struct usb_serial *serial)
2400 {
2401 }
2402 
2403 static void edge_release(struct usb_serial *serial)
2404 {
2405 	kfree(usb_get_serial_data(serial));
2406 }
2407 
2408 static int edge_port_probe(struct usb_serial_port *port)
2409 {
2410 	struct edgeport_port *edge_port;
2411 	int ret;
2412 
2413 	edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2414 	if (!edge_port)
2415 		return -ENOMEM;
2416 
2417 	spin_lock_init(&edge_port->ep_lock);
2418 	edge_port->port = port;
2419 	edge_port->edge_serial = usb_get_serial_data(port->serial);
2420 	edge_port->bUartMode = default_uart_mode;
2421 
2422 	switch (port->port_number) {
2423 	case 0:
2424 		edge_port->uart_base = UMPMEM_BASE_UART1;
2425 		edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2426 		break;
2427 	case 1:
2428 		edge_port->uart_base = UMPMEM_BASE_UART2;
2429 		edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2430 		break;
2431 	default:
2432 		dev_err(&port->dev, "unknown port number\n");
2433 		ret = -ENODEV;
2434 		goto err;
2435 	}
2436 
2437 	dev_dbg(&port->dev,
2438 		"%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2439 		__func__, port->port_number, edge_port->uart_base,
2440 		edge_port->dma_address);
2441 
2442 	usb_set_serial_port_data(port, edge_port);
2443 
2444 	ret = edge_create_sysfs_attrs(port);
2445 	if (ret)
2446 		goto err;
2447 
2448 	port->port.closing_wait = msecs_to_jiffies(closing_wait * 10);
2449 	port->port.drain_delay = 1;
2450 
2451 	return 0;
2452 err:
2453 	kfree(edge_port);
2454 
2455 	return ret;
2456 }
2457 
2458 static int edge_port_remove(struct usb_serial_port *port)
2459 {
2460 	struct edgeport_port *edge_port;
2461 
2462 	edge_port = usb_get_serial_port_data(port);
2463 	edge_remove_sysfs_attrs(port);
2464 	kfree(edge_port);
2465 
2466 	return 0;
2467 }
2468 
2469 /* Sysfs Attributes */
2470 
2471 static ssize_t uart_mode_show(struct device *dev,
2472 	struct device_attribute *attr, char *buf)
2473 {
2474 	struct usb_serial_port *port = to_usb_serial_port(dev);
2475 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2476 
2477 	return sprintf(buf, "%d\n", edge_port->bUartMode);
2478 }
2479 
2480 static ssize_t uart_mode_store(struct device *dev,
2481 	struct device_attribute *attr, const char *valbuf, size_t count)
2482 {
2483 	struct usb_serial_port *port = to_usb_serial_port(dev);
2484 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2485 	unsigned int v = simple_strtoul(valbuf, NULL, 0);
2486 
2487 	dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2488 
2489 	if (v < 256)
2490 		edge_port->bUartMode = v;
2491 	else
2492 		dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2493 
2494 	return count;
2495 }
2496 static DEVICE_ATTR_RW(uart_mode);
2497 
2498 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2499 {
2500 	return device_create_file(&port->dev, &dev_attr_uart_mode);
2501 }
2502 
2503 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2504 {
2505 	device_remove_file(&port->dev, &dev_attr_uart_mode);
2506 	return 0;
2507 }
2508 
2509 
2510 static struct usb_serial_driver edgeport_1port_device = {
2511 	.driver = {
2512 		.owner		= THIS_MODULE,
2513 		.name		= "edgeport_ti_1",
2514 	},
2515 	.description		= "Edgeport TI 1 port adapter",
2516 	.id_table		= edgeport_1port_id_table,
2517 	.num_ports		= 1,
2518 	.open			= edge_open,
2519 	.close			= edge_close,
2520 	.throttle		= edge_throttle,
2521 	.unthrottle		= edge_unthrottle,
2522 	.attach			= edge_startup,
2523 	.disconnect		= edge_disconnect,
2524 	.release		= edge_release,
2525 	.port_probe		= edge_port_probe,
2526 	.port_remove		= edge_port_remove,
2527 	.ioctl			= edge_ioctl,
2528 	.set_termios		= edge_set_termios,
2529 	.tiocmget		= edge_tiocmget,
2530 	.tiocmset		= edge_tiocmset,
2531 	.tiocmiwait		= usb_serial_generic_tiocmiwait,
2532 	.get_icount		= usb_serial_generic_get_icount,
2533 	.write			= edge_write,
2534 	.write_room		= edge_write_room,
2535 	.chars_in_buffer	= edge_chars_in_buffer,
2536 	.tx_empty		= edge_tx_empty,
2537 	.break_ctl		= edge_break,
2538 	.read_int_callback	= edge_interrupt_callback,
2539 	.read_bulk_callback	= edge_bulk_in_callback,
2540 	.write_bulk_callback	= edge_bulk_out_callback,
2541 };
2542 
2543 static struct usb_serial_driver edgeport_2port_device = {
2544 	.driver = {
2545 		.owner		= THIS_MODULE,
2546 		.name		= "edgeport_ti_2",
2547 	},
2548 	.description		= "Edgeport TI 2 port adapter",
2549 	.id_table		= edgeport_2port_id_table,
2550 	.num_ports		= 2,
2551 	.open			= edge_open,
2552 	.close			= edge_close,
2553 	.throttle		= edge_throttle,
2554 	.unthrottle		= edge_unthrottle,
2555 	.attach			= edge_startup,
2556 	.disconnect		= edge_disconnect,
2557 	.release		= edge_release,
2558 	.port_probe		= edge_port_probe,
2559 	.port_remove		= edge_port_remove,
2560 	.ioctl			= edge_ioctl,
2561 	.set_termios		= edge_set_termios,
2562 	.tiocmget		= edge_tiocmget,
2563 	.tiocmset		= edge_tiocmset,
2564 	.tiocmiwait		= usb_serial_generic_tiocmiwait,
2565 	.get_icount		= usb_serial_generic_get_icount,
2566 	.write			= edge_write,
2567 	.write_room		= edge_write_room,
2568 	.chars_in_buffer	= edge_chars_in_buffer,
2569 	.tx_empty		= edge_tx_empty,
2570 	.break_ctl		= edge_break,
2571 	.read_int_callback	= edge_interrupt_callback,
2572 	.read_bulk_callback	= edge_bulk_in_callback,
2573 	.write_bulk_callback	= edge_bulk_out_callback,
2574 };
2575 
2576 static struct usb_serial_driver * const serial_drivers[] = {
2577 	&edgeport_1port_device, &edgeport_2port_device, NULL
2578 };
2579 
2580 module_usb_serial_driver(serial_drivers, id_table_combined);
2581 
2582 MODULE_AUTHOR(DRIVER_AUTHOR);
2583 MODULE_DESCRIPTION(DRIVER_DESC);
2584 MODULE_LICENSE("GPL");
2585 MODULE_FIRMWARE("edgeport/down3.bin");
2586 
2587 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2588 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2589 
2590 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2591 MODULE_PARM_DESC(ignore_cpu_rev,
2592 			"Ignore the cpu revision when connecting to a device");
2593 
2594 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2595 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
2596