Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/usb/serial/io_ti.c

  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/kfifo.h>
 32 #include <linux/ioctl.h>
 33 #include <linux/firmware.h>
 34 #include <linux/uaccess.h>
 35 #include <linux/usb.h>
 36 #include <linux/usb/serial.h>
 37 
 38 #include "io_16654.h"
 39 #include "io_usbvend.h"
 40 #include "io_ti.h"
 41 
 42 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
 43 #define DRIVER_DESC "Edgeport USB Serial Driver"
 44 
 45 #define EPROM_PAGE_SIZE         64
 46 
 47 
 48 /* different hardware types */
 49 #define HARDWARE_TYPE_930       0
 50 #define HARDWARE_TYPE_TIUMP     1
 51 
 52 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
 53 #define TI_MODE_CONFIGURING     0   /* Device has not entered start device */
 54 #define TI_MODE_BOOT            1   /* Staying in boot mode                */
 55 #define TI_MODE_DOWNLOAD        2   /* Made it to download mode            */
 56 #define TI_MODE_TRANSITIONING   3   /* Currently in boot mode but
 57                                        transitioning to download mode      */
 58 
 59 /* read urb state */
 60 #define EDGE_READ_URB_RUNNING   0
 61 #define EDGE_READ_URB_STOPPING  1
 62 #define EDGE_READ_URB_STOPPED   2
 63 
 64 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
 65 
 66 
 67 /* Product information read from the Edgeport */
 68 struct product_info {
 69         int     TiMode;                 /* Current TI Mode  */
 70         __u8    hardware_type;          /* Type of hardware */
 71 } __attribute__((packed));
 72 
 73 struct edgeport_port {
 74         __u16 uart_base;
 75         __u16 dma_address;
 76         __u8 shadow_msr;
 77         __u8 shadow_mcr;
 78         __u8 shadow_lsr;
 79         __u8 lsr_mask;
 80         __u32 ump_read_timeout;         /* Number of milliseconds the UMP will
 81                                            wait without data before completing
 82                                            a read short */
 83         int baud_rate;
 84         int close_pending;
 85         int lsr_event;
 86 
 87         struct edgeport_serial  *edge_serial;
 88         struct usb_serial_port  *port;
 89         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
 90         spinlock_t ep_lock;
 91         int ep_read_urb_state;
 92         int ep_write_urb_in_use;
 93 };
 94 
 95 struct edgeport_serial {
 96         struct product_info product_info;
 97         u8 TI_I2C_Type;                 /* Type of I2C in UMP */
 98         u8 TiReadI2C;                   /* Set to TRUE if we have read the
 99                                            I2c in Boot Mode */
100         struct mutex es_lock;
101         int num_ports_open;
102         struct usb_serial *serial;
103 };
104 
105 
106 /* Devices that this driver supports */
107 static const struct usb_device_id edgeport_1port_id_table[] = {
108         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
109         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
110         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
111         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
112         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
113         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
114         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
115         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
116         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
117         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
118         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
119         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
120         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
121         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
122         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
123         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
124         { }
125 };
126 
127 static const struct usb_device_id edgeport_2port_id_table[] = {
128         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
129         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
130         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
131         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
132         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
133         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
134         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
135         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
136         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
137         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
138         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
139         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
140         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
141         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
142         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
143         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
146         { }
147 };
148 
149 /* Devices that this driver supports */
150 static const struct usb_device_id id_table_combined[] = {
151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
153         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
154         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
155         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
156         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
157         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
158         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
160         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
161         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
162         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
163         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
165         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
169         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
170         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
171         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
172         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
173         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
174         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
175         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
176         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
177         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
178         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
179         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
180         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
182         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
183         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
184         { }
185 };
186 
187 MODULE_DEVICE_TABLE(usb, id_table_combined);
188 
189 static unsigned char OperationalMajorVersion;
190 static unsigned char OperationalMinorVersion;
191 static unsigned short OperationalBuildNumber;
192 
193 static int closing_wait = EDGE_CLOSING_WAIT;
194 static bool ignore_cpu_rev;
195 static int default_uart_mode;           /* RS232 */
196 
197 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
198                 int length);
199 
200 static void stop_read(struct edgeport_port *edge_port);
201 static int restart_read(struct edgeport_port *edge_port);
202 
203 static void edge_set_termios(struct tty_struct *tty,
204                 struct usb_serial_port *port, struct ktermios *old_termios);
205 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
206 
207 /* sysfs attributes */
208 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
209 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
210 
211 
212 static int ti_vread_sync(struct usb_device *dev, __u8 request,
213                                 __u16 value, __u16 index, u8 *data, int size)
214 {
215         int status;
216 
217         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
218                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
219                         value, index, data, size, 1000);
220         if (status < 0)
221                 return status;
222         if (status != size) {
223                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
224                         __func__, size, status);
225                 return -ECOMM;
226         }
227         return 0;
228 }
229 
230 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
231                                 __u16 value, __u16 index, u8 *data, int size)
232 {
233         int status;
234 
235         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
236                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
237                         value, index, data, size, 1000);
238         if (status < 0)
239                 return status;
240         if (status != size) {
241                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
242                         __func__, size, status);
243                 return -ECOMM;
244         }
245         return 0;
246 }
247 
248 static int send_cmd(struct usb_device *dev, __u8 command,
249                                 __u8 moduleid, __u16 value, u8 *data,
250                                 int size)
251 {
252         return ti_vsend_sync(dev, command, value, moduleid, data, size);
253 }
254 
255 /* clear tx/rx buffers and fifo in TI UMP */
256 static int purge_port(struct usb_serial_port *port, __u16 mask)
257 {
258         int port_number = port->port_number;
259 
260         dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
261 
262         return send_cmd(port->serial->dev,
263                                         UMPC_PURGE_PORT,
264                                         (__u8)(UMPM_UART1_PORT + port_number),
265                                         mask,
266                                         NULL,
267                                         0);
268 }
269 
270 /**
271  * read_download_mem - Read edgeport memory from TI chip
272  * @dev: usb device pointer
273  * @start_address: Device CPU address at which to read
274  * @length: Length of above data
275  * @address_type: Can read both XDATA and I2C
276  * @buffer: pointer to input data buffer
277  */
278 static int read_download_mem(struct usb_device *dev, int start_address,
279                                 int length, __u8 address_type, __u8 *buffer)
280 {
281         int status = 0;
282         __u8 read_length;
283         __be16 be_start_address;
284 
285         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
286 
287         /* Read in blocks of 64 bytes
288          * (TI firmware can't handle more than 64 byte reads)
289          */
290         while (length) {
291                 if (length > 64)
292                         read_length = 64;
293                 else
294                         read_length = (__u8)length;
295 
296                 if (read_length > 1) {
297                         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
298                 }
299                 be_start_address = cpu_to_be16(start_address);
300                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
301                                         (__u16)address_type,
302                                         (__force __u16)be_start_address,
303                                         buffer, read_length);
304 
305                 if (status) {
306                         dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
307                         return status;
308                 }
309 
310                 if (read_length > 1)
311                         usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
312 
313                 /* Update pointers/length */
314                 start_address += read_length;
315                 buffer += read_length;
316                 length -= read_length;
317         }
318 
319         return status;
320 }
321 
322 static int read_ram(struct usb_device *dev, int start_address,
323                                                 int length, __u8 *buffer)
324 {
325         return read_download_mem(dev, start_address, length,
326                                         DTK_ADDR_SPACE_XDATA, buffer);
327 }
328 
329 /* Read edgeport memory to a given block */
330 static int read_boot_mem(struct edgeport_serial *serial,
331                                 int start_address, int length, __u8 *buffer)
332 {
333         int status = 0;
334         int i;
335 
336         for (i = 0; i < length; i++) {
337                 status = ti_vread_sync(serial->serial->dev,
338                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
339                                 (__u16)(start_address+i), &buffer[i], 0x01);
340                 if (status) {
341                         dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
342                         return status;
343                 }
344         }
345 
346         dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
347                 __func__, start_address, length);
348         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
349 
350         serial->TiReadI2C = 1;
351 
352         return status;
353 }
354 
355 /* Write given block to TI EPROM memory */
356 static int write_boot_mem(struct edgeport_serial *serial,
357                                 int start_address, int length, __u8 *buffer)
358 {
359         int status = 0;
360         int i;
361         u8 *temp;
362 
363         /* Must do a read before write */
364         if (!serial->TiReadI2C) {
365                 temp = kmalloc(1, GFP_KERNEL);
366                 if (!temp)
367                         return -ENOMEM;
368 
369                 status = read_boot_mem(serial, 0, 1, temp);
370                 kfree(temp);
371                 if (status)
372                         return status;
373         }
374 
375         for (i = 0; i < length; ++i) {
376                 status = ti_vsend_sync(serial->serial->dev,
377                                 UMPC_MEMORY_WRITE, buffer[i],
378                                 (__u16)(i + start_address), NULL, 0);
379                 if (status)
380                         return status;
381         }
382 
383         dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
384         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
385 
386         return status;
387 }
388 
389 
390 /* Write edgeport I2C memory to TI chip */
391 static int write_i2c_mem(struct edgeport_serial *serial,
392                 int start_address, int length, __u8 address_type, __u8 *buffer)
393 {
394         struct device *dev = &serial->serial->dev->dev;
395         int status = 0;
396         int write_length;
397         __be16 be_start_address;
398 
399         /* We can only send a maximum of 1 aligned byte page at a time */
400 
401         /* calculate the number of bytes left in the first page */
402         write_length = EPROM_PAGE_SIZE -
403                                 (start_address & (EPROM_PAGE_SIZE - 1));
404 
405         if (write_length > length)
406                 write_length = length;
407 
408         dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
409                 __func__, start_address, write_length);
410         usb_serial_debug_data(dev, __func__, write_length, buffer);
411 
412         /* Write first page */
413         be_start_address = cpu_to_be16(start_address);
414         status = ti_vsend_sync(serial->serial->dev,
415                                 UMPC_MEMORY_WRITE, (__u16)address_type,
416                                 (__force __u16)be_start_address,
417                                 buffer, write_length);
418         if (status) {
419                 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
420                 return status;
421         }
422 
423         length          -= write_length;
424         start_address   += write_length;
425         buffer          += write_length;
426 
427         /* We should be aligned now -- can write
428            max page size bytes at a time */
429         while (length) {
430                 if (length > EPROM_PAGE_SIZE)
431                         write_length = EPROM_PAGE_SIZE;
432                 else
433                         write_length = length;
434 
435                 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
436                         __func__, start_address, write_length);
437                 usb_serial_debug_data(dev, __func__, write_length, buffer);
438 
439                 /* Write next page */
440                 be_start_address = cpu_to_be16(start_address);
441                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
442                                 (__u16)address_type,
443                                 (__force __u16)be_start_address,
444                                 buffer, write_length);
445                 if (status) {
446                         dev_err(dev, "%s - ERROR %d\n", __func__, status);
447                         return status;
448                 }
449 
450                 length          -= write_length;
451                 start_address   += write_length;
452                 buffer          += write_length;
453         }
454         return status;
455 }
456 
457 /* Examine the UMP DMA registers and LSR
458  *
459  * Check the MSBit of the X and Y DMA byte count registers.
460  * A zero in this bit indicates that the TX DMA buffers are empty
461  * then check the TX Empty bit in the UART.
462  */
463 static int tx_active(struct edgeport_port *port)
464 {
465         int status;
466         struct out_endpoint_desc_block *oedb;
467         __u8 *lsr;
468         int bytes_left = 0;
469 
470         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
471         if (!oedb)
472                 return -ENOMEM;
473 
474         lsr = kmalloc(1, GFP_KERNEL);   /* Sigh, that's right, just one byte,
475                                            as not all platforms can do DMA
476                                            from stack */
477         if (!lsr) {
478                 kfree(oedb);
479                 return -ENOMEM;
480         }
481         /* Read the DMA Count Registers */
482         status = read_ram(port->port->serial->dev, port->dma_address,
483                                                 sizeof(*oedb), (void *)oedb);
484         if (status)
485                 goto exit_is_tx_active;
486 
487         dev_dbg(&port->port->dev, "%s - XByteCount    0x%X\n", __func__, oedb->XByteCount);
488 
489         /* and the LSR */
490         status = read_ram(port->port->serial->dev,
491                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
492 
493         if (status)
494                 goto exit_is_tx_active;
495         dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
496 
497         /* If either buffer has data or we are transmitting then return TRUE */
498         if ((oedb->XByteCount & 0x80) != 0)
499                 bytes_left += 64;
500 
501         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
502                 bytes_left += 1;
503 
504         /* We return Not Active if we get any kind of error */
505 exit_is_tx_active:
506         dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
507 
508         kfree(lsr);
509         kfree(oedb);
510         return bytes_left;
511 }
512 
513 static int choose_config(struct usb_device *dev)
514 {
515         /*
516          * There may be multiple configurations on this device, in which case
517          * we would need to read and parse all of them to find out which one
518          * we want. However, we just support one config at this point,
519          * configuration # 1, which is Config Descriptor 0.
520          */
521 
522         dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
523                 __func__, dev->config->desc.bNumInterfaces);
524         dev_dbg(&dev->dev, "%s - MAX Power            = %d\n",
525                 __func__, dev->config->desc.bMaxPower * 2);
526 
527         if (dev->config->desc.bNumInterfaces != 1) {
528                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
529                 return -ENODEV;
530         }
531 
532         return 0;
533 }
534 
535 static int read_rom(struct edgeport_serial *serial,
536                                 int start_address, int length, __u8 *buffer)
537 {
538         int status;
539 
540         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
541                 status = read_download_mem(serial->serial->dev,
542                                                start_address,
543                                                length,
544                                                serial->TI_I2C_Type,
545                                                buffer);
546         } else {
547                 status = read_boot_mem(serial, start_address, length,
548                                                                 buffer);
549         }
550         return status;
551 }
552 
553 static int write_rom(struct edgeport_serial *serial, int start_address,
554                                                 int length, __u8 *buffer)
555 {
556         if (serial->product_info.TiMode == TI_MODE_BOOT)
557                 return write_boot_mem(serial, start_address, length,
558                                                                 buffer);
559 
560         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
561                 return write_i2c_mem(serial, start_address, length,
562                                                 serial->TI_I2C_Type, buffer);
563         return -EINVAL;
564 }
565 
566 
567 
568 /* Read a descriptor header from I2C based on type */
569 static int get_descriptor_addr(struct edgeport_serial *serial,
570                                 int desc_type, struct ti_i2c_desc *rom_desc)
571 {
572         int start_address;
573         int status;
574 
575         /* Search for requested descriptor in I2C */
576         start_address = 2;
577         do {
578                 status = read_rom(serial,
579                                    start_address,
580                                    sizeof(struct ti_i2c_desc),
581                                    (__u8 *)rom_desc);
582                 if (status)
583                         return 0;
584 
585                 if (rom_desc->Type == desc_type)
586                         return start_address;
587 
588                 start_address = start_address + sizeof(struct ti_i2c_desc)
589                                                         + rom_desc->Size;
590 
591         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
592 
593         return 0;
594 }
595 
596 /* Validate descriptor checksum */
597 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
598 {
599         __u16 i;
600         __u8 cs = 0;
601 
602         for (i = 0; i < rom_desc->Size; i++)
603                 cs = (__u8)(cs + buffer[i]);
604 
605         if (cs != rom_desc->CheckSum) {
606                 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
607                 return -EINVAL;
608         }
609         return 0;
610 }
611 
612 /* Make sure that the I2C image is good */
613 static int check_i2c_image(struct edgeport_serial *serial)
614 {
615         struct device *dev = &serial->serial->dev->dev;
616         int status = 0;
617         struct ti_i2c_desc *rom_desc;
618         int start_address = 2;
619         __u8 *buffer;
620         __u16 ttype;
621 
622         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
623         if (!rom_desc)
624                 return -ENOMEM;
625 
626         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
627         if (!buffer) {
628                 kfree(rom_desc);
629                 return -ENOMEM;
630         }
631 
632         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
633         status = read_rom(serial, 0, 1, buffer);
634         if (status)
635                 goto out;
636 
637         if (*buffer != UMP5152 && *buffer != UMP3410) {
638                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
639                 status = -ENODEV;
640                 goto out;
641         }
642 
643         do {
644                 /* Validate the I2C */
645                 status = read_rom(serial,
646                                 start_address,
647                                 sizeof(struct ti_i2c_desc),
648                                 (__u8 *)rom_desc);
649                 if (status)
650                         break;
651 
652                 if ((start_address + sizeof(struct ti_i2c_desc) +
653                                         rom_desc->Size) > TI_MAX_I2C_SIZE) {
654                         status = -ENODEV;
655                         dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
656                         break;
657                 }
658 
659                 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
660 
661                 /* Skip type 2 record */
662                 ttype = rom_desc->Type & 0x0f;
663                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
664                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
665                         /* Read the descriptor data */
666                         status = read_rom(serial, start_address +
667                                                 sizeof(struct ti_i2c_desc),
668                                                 rom_desc->Size, buffer);
669                         if (status)
670                                 break;
671 
672                         status = valid_csum(rom_desc, buffer);
673                         if (status)
674                                 break;
675                 }
676                 start_address = start_address + sizeof(struct ti_i2c_desc) +
677                                                                 rom_desc->Size;
678 
679         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
680                                 (start_address < TI_MAX_I2C_SIZE));
681 
682         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
683                                 (start_address > TI_MAX_I2C_SIZE))
684                 status = -ENODEV;
685 
686 out:
687         kfree(buffer);
688         kfree(rom_desc);
689         return status;
690 }
691 
692 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
693 {
694         int status;
695         int start_address;
696         struct ti_i2c_desc *rom_desc;
697         struct edge_ti_manuf_descriptor *desc;
698         struct device *dev = &serial->serial->dev->dev;
699 
700         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
701         if (!rom_desc)
702                 return -ENOMEM;
703 
704         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
705                                                                 rom_desc);
706 
707         if (!start_address) {
708                 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
709                 status = -ENODEV;
710                 goto exit;
711         }
712 
713         /* Read the descriptor data */
714         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
715                                                 rom_desc->Size, buffer);
716         if (status)
717                 goto exit;
718 
719         status = valid_csum(rom_desc, buffer);
720 
721         desc = (struct edge_ti_manuf_descriptor *)buffer;
722         dev_dbg(dev, "%s - IonConfig      0x%x\n", __func__, desc->IonConfig);
723         dev_dbg(dev, "%s - Version          %d\n", __func__, desc->Version);
724         dev_dbg(dev, "%s - Cpu/Board      0x%x\n", __func__, desc->CpuRev_BoardRev);
725         dev_dbg(dev, "%s - NumPorts         %d\n", __func__, desc->NumPorts);
726         dev_dbg(dev, "%s - NumVirtualPorts  %d\n", __func__, desc->NumVirtualPorts);
727         dev_dbg(dev, "%s - TotalPorts       %d\n", __func__, desc->TotalPorts);
728 
729 exit:
730         kfree(rom_desc);
731         return status;
732 }
733 
734 /* Build firmware header used for firmware update */
735 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
736 {
737         __u8 *buffer;
738         int buffer_size;
739         int i;
740         int err;
741         __u8 cs = 0;
742         struct ti_i2c_desc *i2c_header;
743         struct ti_i2c_image_header *img_header;
744         struct ti_i2c_firmware_rec *firmware_rec;
745         const struct firmware *fw;
746         const char *fw_name = "edgeport/down3.bin";
747 
748         /* In order to update the I2C firmware we must change the type 2 record
749          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
750          * Then while in boot mode, the driver will download the latest
751          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
752          * device comes back up in download mode the driver will cause the new
753          * firmware to be copied from the UMP Ram to I2C and the firmware will
754          * update the record type from 0xf2 to 0x02.
755          */
756 
757         /* Allocate a 15.5k buffer + 2 bytes for version number
758          * (Firmware Record) */
759         buffer_size = (((1024 * 16) - 512 ) +
760                         sizeof(struct ti_i2c_firmware_rec));
761 
762         buffer = kmalloc(buffer_size, GFP_KERNEL);
763         if (!buffer)
764                 return -ENOMEM;
765 
766         // Set entire image of 0xffs
767         memset(buffer, 0xff, buffer_size);
768 
769         err = request_firmware(&fw, fw_name, dev);
770         if (err) {
771                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
772                         fw_name, err);
773                 kfree(buffer);
774                 return err;
775         }
776 
777         /* Save Download Version Number */
778         OperationalMajorVersion = fw->data[0];
779         OperationalMinorVersion = fw->data[1];
780         OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
781 
782         /* Copy version number into firmware record */
783         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
784 
785         firmware_rec->Ver_Major = OperationalMajorVersion;
786         firmware_rec->Ver_Minor = OperationalMinorVersion;
787 
788         /* Pointer to fw_down memory image */
789         img_header = (struct ti_i2c_image_header *)&fw->data[4];
790 
791         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
792                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
793                 le16_to_cpu(img_header->Length));
794 
795         release_firmware(fw);
796 
797         for (i=0; i < buffer_size; i++) {
798                 cs = (__u8)(cs + buffer[i]);
799         }
800 
801         kfree(buffer);
802 
803         /* Build new header */
804         i2c_header =  (struct ti_i2c_desc *)header;
805         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
806 
807         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
808         i2c_header->Size        = (__u16)buffer_size;
809         i2c_header->CheckSum    = cs;
810         firmware_rec->Ver_Major = OperationalMajorVersion;
811         firmware_rec->Ver_Minor = OperationalMinorVersion;
812 
813         return 0;
814 }
815 
816 /* Try to figure out what type of I2c we have */
817 static int i2c_type_bootmode(struct edgeport_serial *serial)
818 {
819         struct device *dev = &serial->serial->dev->dev;
820         int status;
821         u8 *data;
822 
823         data = kmalloc(1, GFP_KERNEL);
824         if (!data)
825                 return -ENOMEM;
826 
827         /* Try to read type 2 */
828         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
829                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
830         if (status)
831                 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
832         else
833                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
834         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
835                 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
836                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
837                 goto out;
838         }
839 
840         /* Try to read type 3 */
841         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
842                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
843         if (status)
844                 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
845         else
846                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
847         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
848                 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
849                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
850                 goto out;
851         }
852 
853         dev_dbg(dev, "%s - Unknown\n", __func__);
854         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
855         status = -ENODEV;
856 out:
857         kfree(data);
858         return status;
859 }
860 
861 static int bulk_xfer(struct usb_serial *serial, void *buffer,
862                                                 int length, int *num_sent)
863 {
864         int status;
865 
866         status = usb_bulk_msg(serial->dev,
867                         usb_sndbulkpipe(serial->dev,
868                                 serial->port[0]->bulk_out_endpointAddress),
869                         buffer, length, num_sent, 1000);
870         return status;
871 }
872 
873 /* Download given firmware image to the device (IN BOOT MODE) */
874 static int download_code(struct edgeport_serial *serial, __u8 *image,
875                                                         int image_length)
876 {
877         int status = 0;
878         int pos;
879         int transfer;
880         int done;
881 
882         /* Transfer firmware image */
883         for (pos = 0; pos < image_length; ) {
884                 /* Read the next buffer from file */
885                 transfer = image_length - pos;
886                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
887                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
888 
889                 /* Transfer data */
890                 status = bulk_xfer(serial->serial, &image[pos],
891                                                         transfer, &done);
892                 if (status)
893                         break;
894                 /* Advance buffer pointer */
895                 pos += done;
896         }
897 
898         return status;
899 }
900 
901 /* FIXME!!! */
902 static int config_boot_dev(struct usb_device *dev)
903 {
904         return 0;
905 }
906 
907 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
908 {
909         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
910 }
911 
912 /**
913  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
914  *
915  * This routine downloads the main operating code into the TI5052, using the
916  * boot code already burned into E2PROM or ROM.
917  */
918 static int download_fw(struct edgeport_serial *serial)
919 {
920         struct device *dev = &serial->serial->dev->dev;
921         int status = 0;
922         int start_address;
923         struct edge_ti_manuf_descriptor *ti_manuf_desc;
924         struct usb_interface_descriptor *interface;
925         int download_cur_ver;
926         int download_new_ver;
927 
928         /* This routine is entered by both the BOOT mode and the Download mode
929          * We can determine which code is running by the reading the config
930          * descriptor and if we have only one bulk pipe it is in boot mode
931          */
932         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
933 
934         /* Default to type 2 i2c */
935         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
936 
937         status = choose_config(serial->serial->dev);
938         if (status)
939                 return status;
940 
941         interface = &serial->serial->interface->cur_altsetting->desc;
942         if (!interface) {
943                 dev_err(dev, "%s - no interface set, error!\n", __func__);
944                 return -ENODEV;
945         }
946 
947         /*
948          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
949          * if we have more than one endpoint we are definitely in download
950          * mode
951          */
952         if (interface->bNumEndpoints > 1)
953                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
954         else
955                 /* Otherwise we will remain in configuring mode */
956                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
957 
958         /********************************************************************/
959         /* Download Mode */
960         /********************************************************************/
961         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
962                 struct ti_i2c_desc *rom_desc;
963 
964                 dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
965 
966                 status = check_i2c_image(serial);
967                 if (status) {
968                         dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
969                         return status;
970                 }
971 
972                 /* Validate Hardware version number
973                  * Read Manufacturing Descriptor from TI Based Edgeport
974                  */
975                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
976                 if (!ti_manuf_desc)
977                         return -ENOMEM;
978 
979                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
980                 if (status) {
981                         kfree(ti_manuf_desc);
982                         return status;
983                 }
984 
985                 /* Check version number of ION descriptor */
986                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
987                         dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
988                                 __func__, ti_cpu_rev(ti_manuf_desc));
989                         kfree(ti_manuf_desc);
990                         return -EINVAL;
991                 }
992 
993                 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
994                 if (!rom_desc) {
995                         kfree(ti_manuf_desc);
996                         return -ENOMEM;
997                 }
998 
999                 /* Search for type 2 record (firmware record) */
1000                 start_address = get_descriptor_addr(serial,
1001                                 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1002                 if (start_address != 0) {
1003                         struct ti_i2c_firmware_rec *firmware_version;
1004                         u8 *record;
1005 
1006                         dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n", __func__);
1007 
1008                         firmware_version = kmalloc(sizeof(*firmware_version),
1009                                                                 GFP_KERNEL);
1010                         if (!firmware_version) {
1011                                 kfree(rom_desc);
1012                                 kfree(ti_manuf_desc);
1013                                 return -ENOMEM;
1014                         }
1015 
1016                         /* Validate version number
1017                          * Read the descriptor data
1018                          */
1019                         status = read_rom(serial, start_address +
1020                                         sizeof(struct ti_i2c_desc),
1021                                         sizeof(struct ti_i2c_firmware_rec),
1022                                         (__u8 *)firmware_version);
1023                         if (status) {
1024                                 kfree(firmware_version);
1025                                 kfree(rom_desc);
1026                                 kfree(ti_manuf_desc);
1027                                 return status;
1028                         }
1029 
1030                         /* Check version number of download with current
1031                            version in I2c */
1032                         download_cur_ver = (firmware_version->Ver_Major << 8) +
1033                                            (firmware_version->Ver_Minor);
1034                         download_new_ver = (OperationalMajorVersion << 8) +
1035                                            (OperationalMinorVersion);
1036 
1037                         dev_dbg(dev, "%s - >> FW Versions Device %d.%d  Driver %d.%d\n",
1038                                 __func__, firmware_version->Ver_Major,
1039                                 firmware_version->Ver_Minor,
1040                                 OperationalMajorVersion,
1041                                 OperationalMinorVersion);
1042 
1043                         /* Check if we have an old version in the I2C and
1044                            update if necessary */
1045                         if (download_cur_ver < download_new_ver) {
1046                                 dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1047                                         __func__,
1048                                         firmware_version->Ver_Major,
1049                                         firmware_version->Ver_Minor,
1050                                         OperationalMajorVersion,
1051                                         OperationalMinorVersion);
1052 
1053                                 record = kmalloc(1, GFP_KERNEL);
1054                                 if (!record) {
1055                                         kfree(firmware_version);
1056                                         kfree(rom_desc);
1057                                         kfree(ti_manuf_desc);
1058                                         return -ENOMEM;
1059                                 }
1060                                 /* In order to update the I2C firmware we must
1061                                  * change the type 2 record to type 0xF2. This
1062                                  * will force the UMP to come up in Boot Mode.
1063                                  * Then while in boot mode, the driver will
1064                                  * download the latest firmware (padded to
1065                                  * 15.5k) into the UMP ram. Finally when the
1066                                  * device comes back up in download mode the
1067                                  * driver will cause the new firmware to be
1068                                  * copied from the UMP Ram to I2C and the
1069                                  * firmware will update the record type from
1070                                  * 0xf2 to 0x02.
1071                                  */
1072                                 *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1073 
1074                                 /* Change the I2C Firmware record type to
1075                                    0xf2 to trigger an update */
1076                                 status = write_rom(serial, start_address,
1077                                                 sizeof(*record), record);
1078                                 if (status) {
1079                                         kfree(record);
1080                                         kfree(firmware_version);
1081                                         kfree(rom_desc);
1082                                         kfree(ti_manuf_desc);
1083                                         return status;
1084                                 }
1085 
1086                                 /* verify the write -- must do this in order
1087                                  * for write to complete before we do the
1088                                  * hardware reset
1089                                  */
1090                                 status = read_rom(serial,
1091                                                         start_address,
1092                                                         sizeof(*record),
1093                                                         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                                 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1103                                         dev_err(dev, "%s - error resetting device\n", __func__);
1104                                         kfree(record);
1105                                         kfree(firmware_version);
1106                                         kfree(rom_desc);
1107                                         kfree(ti_manuf_desc);
1108                                         return -ENODEV;
1109                                 }
1110 
1111                                 dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1112 
1113                                 /* Reset UMP -- Back to BOOT MODE */
1114                                 status = ti_vsend_sync(serial->serial->dev,
1115                                                 UMPC_HARDWARE_RESET,
1116                                                 0, 0, NULL, 0);
1117 
1118                                 dev_dbg(dev, "%s - HARDWARE RESET return %d\n", __func__, status);
1119 
1120                                 /* return an error on purpose. */
1121                                 kfree(record);
1122                                 kfree(firmware_version);
1123                                 kfree(rom_desc);
1124                                 kfree(ti_manuf_desc);
1125                                 return -ENODEV;
1126                         }
1127                         kfree(firmware_version);
1128                 }
1129                 /* Search for type 0xF2 record (firmware blank record) */
1130                 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1131 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1132                                         sizeof(struct ti_i2c_firmware_rec))
1133                         __u8 *header;
1134                         __u8 *vheader;
1135 
1136                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1137                         if (!header) {
1138                                 kfree(rom_desc);
1139                                 kfree(ti_manuf_desc);
1140                                 return -ENOMEM;
1141                         }
1142 
1143                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1144                         if (!vheader) {
1145                                 kfree(header);
1146                                 kfree(rom_desc);
1147                                 kfree(ti_manuf_desc);
1148                                 return -ENOMEM;
1149                         }
1150 
1151                         dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n", __func__);
1152 
1153                         /*
1154                          * In order to update the I2C firmware we must change
1155                          * the type 2 record to type 0xF2. This will force the
1156                          * UMP to come up in Boot Mode.  Then while in boot
1157                          * mode, the driver will download the latest firmware
1158                          * (padded to 15.5k) into the UMP ram. Finally when the
1159                          * device comes back up in download mode the driver
1160                          * will cause the new firmware to be copied from the
1161                          * UMP Ram to I2C and the firmware will update the
1162                          * record type from 0xf2 to 0x02.
1163                          */
1164                         status = build_i2c_fw_hdr(header, dev);
1165                         if (status) {
1166                                 kfree(vheader);
1167                                 kfree(header);
1168                                 kfree(rom_desc);
1169                                 kfree(ti_manuf_desc);
1170                                 return -EINVAL;
1171                         }
1172 
1173                         /* Update I2C with type 0xf2 record with correct
1174                            size and checksum */
1175                         status = write_rom(serial,
1176                                                 start_address,
1177                                                 HEADER_SIZE,
1178                                                 header);
1179                         if (status) {
1180                                 kfree(vheader);
1181                                 kfree(header);
1182                                 kfree(rom_desc);
1183                                 kfree(ti_manuf_desc);
1184                                 return -EINVAL;
1185                         }
1186 
1187                         /* verify the write -- must do this in order for
1188                            write to complete before we do the hardware reset */
1189                         status = read_rom(serial, start_address,
1190                                                         HEADER_SIZE, vheader);
1191 
1192                         if (status) {
1193                                 dev_dbg(dev, "%s - can't read header back\n", __func__);
1194                                 kfree(vheader);
1195                                 kfree(header);
1196                                 kfree(rom_desc);
1197                                 kfree(ti_manuf_desc);
1198                                 return status;
1199                         }
1200                         if (memcmp(vheader, header, HEADER_SIZE)) {
1201                                 dev_dbg(dev, "%s - write download record failed\n", __func__);
1202                                 kfree(vheader);
1203                                 kfree(header);
1204                                 kfree(rom_desc);
1205                                 kfree(ti_manuf_desc);
1206                                 return -EINVAL;
1207                         }
1208 
1209                         kfree(vheader);
1210                         kfree(header);
1211 
1212                         dev_dbg(dev, "%s - Start firmware update\n", __func__);
1213 
1214                         /* Tell firmware to copy download image into I2C */
1215                         status = ti_vsend_sync(serial->serial->dev,
1216                                         UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1217 
1218                         dev_dbg(dev, "%s - Update complete 0x%x\n", __func__, status);
1219                         if (status) {
1220                                 dev_err(dev,
1221                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1222                                                                 __func__);
1223                                 kfree(rom_desc);
1224                                 kfree(ti_manuf_desc);
1225                                 return status;
1226                         }
1227                 }
1228 
1229                 // The device is running the download code
1230                 kfree(rom_desc);
1231                 kfree(ti_manuf_desc);
1232                 return 0;
1233         }
1234 
1235         /********************************************************************/
1236         /* Boot Mode */
1237         /********************************************************************/
1238         dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1239 
1240         /* Configure the TI device so we can use the BULK pipes for download */
1241         status = config_boot_dev(serial->serial->dev);
1242         if (status)
1243                 return status;
1244 
1245         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1246                                                         != USB_VENDOR_ID_ION) {
1247                 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1248                         le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1249                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1250                 goto stayinbootmode;
1251         }
1252 
1253         /* We have an ION device (I2c Must be programmed)
1254            Determine I2C image type */
1255         if (i2c_type_bootmode(serial))
1256                 goto stayinbootmode;
1257 
1258         /* Check for ION Vendor ID and that the I2C is valid */
1259         if (!check_i2c_image(serial)) {
1260                 struct ti_i2c_image_header *header;
1261                 int i;
1262                 __u8 cs = 0;
1263                 __u8 *buffer;
1264                 int buffer_size;
1265                 int err;
1266                 const struct firmware *fw;
1267                 const char *fw_name = "edgeport/down3.bin";
1268 
1269                 /* Validate Hardware version number
1270                  * Read Manufacturing Descriptor from TI Based Edgeport
1271                  */
1272                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1273                 if (!ti_manuf_desc)
1274                         return -ENOMEM;
1275 
1276                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1277                 if (status) {
1278                         kfree(ti_manuf_desc);
1279                         goto stayinbootmode;
1280                 }
1281 
1282                 /* Check for version 2 */
1283                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1284                         dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1285                                 __func__, ti_cpu_rev(ti_manuf_desc));
1286                         kfree(ti_manuf_desc);
1287                         goto stayinbootmode;
1288                 }
1289 
1290                 kfree(ti_manuf_desc);
1291 
1292                 /*
1293                  * In order to update the I2C firmware we must change the type
1294                  * 2 record to type 0xF2. This will force the UMP to come up
1295                  * in Boot Mode.  Then while in boot mode, the driver will
1296                  * download the latest firmware (padded to 15.5k) into the
1297                  * UMP ram. Finally when the device comes back up in download
1298                  * mode the driver will cause the new firmware to be copied
1299                  * from the UMP Ram to I2C and the firmware will update the
1300                  * record type from 0xf2 to 0x02.
1301                  *
1302                  * Do we really have to copy the whole firmware image,
1303                  * or could we do this in place!
1304                  */
1305 
1306                 /* Allocate a 15.5k buffer + 3 byte header */
1307                 buffer_size = (((1024 * 16) - 512) +
1308                                         sizeof(struct ti_i2c_image_header));
1309                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1310                 if (!buffer)
1311                         return -ENOMEM;
1312 
1313                 /* Initialize the buffer to 0xff (pad the buffer) */
1314                 memset(buffer, 0xff, buffer_size);
1315 
1316                 err = request_firmware(&fw, fw_name, dev);
1317                 if (err) {
1318                         dev_err(dev, "Failed to load image \"%s\" err %d\n",
1319                                 fw_name, err);
1320                         kfree(buffer);
1321                         return err;
1322                 }
1323                 memcpy(buffer, &fw->data[4], fw->size - 4);
1324                 release_firmware(fw);
1325 
1326                 for (i = sizeof(struct ti_i2c_image_header);
1327                                 i < buffer_size; i++) {
1328                         cs = (__u8)(cs + buffer[i]);
1329                 }
1330 
1331                 header = (struct ti_i2c_image_header *)buffer;
1332 
1333                 /* update length and checksum after padding */
1334                 header->Length   = cpu_to_le16((__u16)(buffer_size -
1335                                         sizeof(struct ti_i2c_image_header)));
1336                 header->CheckSum = cs;
1337 
1338                 /* Download the operational code  */
1339                 dev_dbg(dev, "%s - Downloading operational code image (TI UMP)\n", __func__);
1340                 status = download_code(serial, buffer, buffer_size);
1341 
1342                 kfree(buffer);
1343 
1344                 if (status) {
1345                         dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1346                         return status;
1347                 }
1348 
1349                 /* Device will reboot */
1350                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1351 
1352                 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1353 
1354                 /* return an error on purpose */
1355                 return -ENODEV;
1356         }
1357 
1358 stayinbootmode:
1359         /* Eprom is invalid or blank stay in boot mode */
1360         dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1361         serial->product_info.TiMode = TI_MODE_BOOT;
1362 
1363         return 0;
1364 }
1365 
1366 
1367 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1368 {
1369         int port_number = port->port->port_number;
1370 
1371         on = !!on;      /* 1 or 0 not bitmask */
1372         return send_cmd(port->port->serial->dev,
1373                         feature, (__u8)(UMPM_UART1_PORT + port_number),
1374                         on, NULL, 0);
1375 }
1376 
1377 
1378 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1379 {
1380         int status = 0;
1381 
1382         dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1383 
1384         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1385         if (status)
1386                 return status;
1387         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1388         if (status)
1389                 return status;
1390         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1391 }
1392 
1393 /* Convert TI LSR to standard UART flags */
1394 static __u8 map_line_status(__u8 ti_lsr)
1395 {
1396         __u8 lsr = 0;
1397 
1398 #define MAP_FLAG(flagUmp, flagUart)    \
1399         if (ti_lsr & flagUmp) \
1400                 lsr |= flagUart;
1401 
1402         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1403         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1404         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1405         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1406         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1407         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1408 
1409 #undef MAP_FLAG
1410 
1411         return lsr;
1412 }
1413 
1414 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1415 {
1416         struct async_icount *icount;
1417         struct tty_struct *tty;
1418 
1419         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1420 
1421         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1422                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1423                 icount = &edge_port->port->icount;
1424 
1425                 /* update input line counters */
1426                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1427                         icount->cts++;
1428                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1429                         icount->dsr++;
1430                 if (msr & EDGEPORT_MSR_DELTA_CD)
1431                         icount->dcd++;
1432                 if (msr & EDGEPORT_MSR_DELTA_RI)
1433                         icount->rng++;
1434                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1435         }
1436 
1437         /* Save the new modem status */
1438         edge_port->shadow_msr = msr & 0xf0;
1439 
1440         tty = tty_port_tty_get(&edge_port->port->port);
1441         /* handle CTS flow control */
1442         if (tty && C_CRTSCTS(tty)) {
1443                 if (msr & EDGEPORT_MSR_CTS) {
1444                         tty->hw_stopped = 0;
1445                         tty_wakeup(tty);
1446                 } else {
1447                         tty->hw_stopped = 1;
1448                 }
1449         }
1450         tty_kref_put(tty);
1451 }
1452 
1453 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1454                                                         __u8 lsr, __u8 data)
1455 {
1456         struct async_icount *icount;
1457         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1458                                                 LSR_FRM_ERR | LSR_BREAK));
1459 
1460         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1461 
1462         edge_port->shadow_lsr = lsr;
1463 
1464         if (new_lsr & LSR_BREAK)
1465                 /*
1466                  * Parity and Framing errors only count if they
1467                  * occur exclusive of a break being received.
1468                  */
1469                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1470 
1471         /* Place LSR data byte into Rx buffer */
1472         if (lsr_data)
1473                 edge_tty_recv(edge_port->port, &data, 1);
1474 
1475         /* update input line counters */
1476         icount = &edge_port->port->icount;
1477         if (new_lsr & LSR_BREAK)
1478                 icount->brk++;
1479         if (new_lsr & LSR_OVER_ERR)
1480                 icount->overrun++;
1481         if (new_lsr & LSR_PAR_ERR)
1482                 icount->parity++;
1483         if (new_lsr & LSR_FRM_ERR)
1484                 icount->frame++;
1485 }
1486 
1487 
1488 static void edge_interrupt_callback(struct urb *urb)
1489 {
1490         struct edgeport_serial *edge_serial = urb->context;
1491         struct usb_serial_port *port;
1492         struct edgeport_port *edge_port;
1493         struct device *dev;
1494         unsigned char *data = urb->transfer_buffer;
1495         int length = urb->actual_length;
1496         int port_number;
1497         int function;
1498         int retval;
1499         __u8 lsr;
1500         __u8 msr;
1501         int status = urb->status;
1502 
1503         switch (status) {
1504         case 0:
1505                 /* success */
1506                 break;
1507         case -ECONNRESET:
1508         case -ENOENT:
1509         case -ESHUTDOWN:
1510                 /* this urb is terminated, clean up */
1511                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1512                     __func__, status);
1513                 return;
1514         default:
1515                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1516                         "%d\n", __func__, status);
1517                 goto exit;
1518         }
1519 
1520         if (!length) {
1521                 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1522                 goto exit;
1523         }
1524 
1525         dev = &edge_serial->serial->dev->dev;
1526         usb_serial_debug_data(dev, __func__, length, data);
1527 
1528         if (length != 2) {
1529                 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1530                 goto exit;
1531         }
1532 
1533         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1534         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1535         dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1536                 port_number, function, data[1]);
1537         port = edge_serial->serial->port[port_number];
1538         edge_port = usb_get_serial_port_data(port);
1539         if (!edge_port) {
1540                 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1541                 return;
1542         }
1543         switch (function) {
1544         case TIUMP_INTERRUPT_CODE_LSR:
1545                 lsr = map_line_status(data[1]);
1546                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1547                         /* Save the LSR event for bulk read
1548                            completion routine */
1549                         dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1550                                 __func__, port_number, lsr);
1551                         edge_port->lsr_event = 1;
1552                         edge_port->lsr_mask = lsr;
1553                 } else {
1554                         dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1555                                 __func__, port_number, lsr);
1556                         handle_new_lsr(edge_port, 0, lsr, 0);
1557                 }
1558                 break;
1559 
1560         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1561                 /* Copy MSR from UMP */
1562                 msr = data[1];
1563                 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1564                         __func__, port_number, msr);
1565                 handle_new_msr(edge_port, msr);
1566                 break;
1567 
1568         default:
1569                 dev_err(&urb->dev->dev,
1570                         "%s - Unknown Interrupt code from UMP %x\n",
1571                         __func__, data[1]);
1572                 break;
1573 
1574         }
1575 
1576 exit:
1577         retval = usb_submit_urb(urb, GFP_ATOMIC);
1578         if (retval)
1579                 dev_err(&urb->dev->dev,
1580                         "%s - usb_submit_urb failed with result %d\n",
1581                          __func__, retval);
1582 }
1583 
1584 static void edge_bulk_in_callback(struct urb *urb)
1585 {
1586         struct edgeport_port *edge_port = urb->context;
1587         struct device *dev = &edge_port->port->dev;
1588         unsigned char *data = urb->transfer_buffer;
1589         int retval = 0;
1590         int port_number;
1591         int status = urb->status;
1592 
1593         switch (status) {
1594         case 0:
1595                 /* success */
1596                 break;
1597         case -ECONNRESET:
1598         case -ENOENT:
1599         case -ESHUTDOWN:
1600                 /* this urb is terminated, clean up */
1601                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1602                 return;
1603         default:
1604                 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1605         }
1606 
1607         if (status == -EPIPE)
1608                 goto exit;
1609 
1610         if (status) {
1611                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1612                 return;
1613         }
1614 
1615         port_number = edge_port->port->port_number;
1616 
1617         if (edge_port->lsr_event) {
1618                 edge_port->lsr_event = 0;
1619                 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1620                         __func__, port_number, edge_port->lsr_mask, *data);
1621                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1622                 /* Adjust buffer length/pointer */
1623                 --urb->actual_length;
1624                 ++data;
1625         }
1626 
1627         if (urb->actual_length) {
1628                 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1629                 if (edge_port->close_pending)
1630                         dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1631                                                                 __func__);
1632                 else
1633                         edge_tty_recv(edge_port->port, data,
1634                                         urb->actual_length);
1635                 edge_port->port->icount.rx += urb->actual_length;
1636         }
1637 
1638 exit:
1639         /* continue read unless stopped */
1640         spin_lock(&edge_port->ep_lock);
1641         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1642                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1643         else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1644                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1645 
1646         spin_unlock(&edge_port->ep_lock);
1647         if (retval)
1648                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1649 }
1650 
1651 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1652                 int length)
1653 {
1654         int queued;
1655 
1656         queued = tty_insert_flip_string(&port->port, data, length);
1657         if (queued < length)
1658                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1659                         __func__, length - queued);
1660         tty_flip_buffer_push(&port->port);
1661 }
1662 
1663 static void edge_bulk_out_callback(struct urb *urb)
1664 {
1665         struct usb_serial_port *port = urb->context;
1666         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1667         int status = urb->status;
1668         struct tty_struct *tty;
1669 
1670         edge_port->ep_write_urb_in_use = 0;
1671 
1672         switch (status) {
1673         case 0:
1674                 /* success */
1675                 break;
1676         case -ECONNRESET:
1677         case -ENOENT:
1678         case -ESHUTDOWN:
1679                 /* this urb is terminated, clean up */
1680                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1681                     __func__, status);
1682                 return;
1683         default:
1684                 dev_err_console(port, "%s - nonzero write bulk status "
1685                         "received: %d\n", __func__, status);
1686         }
1687 
1688         /* send any buffered data */
1689         tty = tty_port_tty_get(&port->port);
1690         edge_send(port, tty);
1691         tty_kref_put(tty);
1692 }
1693 
1694 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1695 {
1696         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1697         struct edgeport_serial *edge_serial;
1698         struct usb_device *dev;
1699         struct urb *urb;
1700         int port_number;
1701         int status;
1702         u16 open_settings;
1703         u8 transaction_timeout;
1704 
1705         if (edge_port == NULL)
1706                 return -ENODEV;
1707 
1708         port_number = port->port_number;
1709 
1710         dev = port->serial->dev;
1711 
1712         /* turn off loopback */
1713         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1714         if (status) {
1715                 dev_err(&port->dev,
1716                                 "%s - cannot send clear loopback command, %d\n",
1717                         __func__, status);
1718                 return status;
1719         }
1720 
1721         /* set up the port settings */
1722         if (tty)
1723                 edge_set_termios(tty, port, &tty->termios);
1724 
1725         /* open up the port */
1726 
1727         /* milliseconds to timeout for DMA transfer */
1728         transaction_timeout = 2;
1729 
1730         edge_port->ump_read_timeout =
1731                                 max(20, ((transaction_timeout * 3) / 2));
1732 
1733         /* milliseconds to timeout for DMA transfer */
1734         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1735                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1736                              (transaction_timeout << 2));
1737 
1738         dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1739 
1740         /* Tell TI to open and start the port */
1741         status = send_cmd(dev, UMPC_OPEN_PORT,
1742                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1743         if (status) {
1744                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1745                                                         __func__, status);
1746                 return status;
1747         }
1748 
1749         /* Start the DMA? */
1750         status = send_cmd(dev, UMPC_START_PORT,
1751                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1752         if (status) {
1753                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1754                                                         __func__, status);
1755                 return status;
1756         }
1757 
1758         /* Clear TX and RX buffers in UMP */
1759         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1760         if (status) {
1761                 dev_err(&port->dev,
1762                         "%s - cannot send clear buffers command, %d\n",
1763                         __func__, status);
1764                 return status;
1765         }
1766 
1767         /* Read Initial MSR */
1768         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1769                                 (__u16)(UMPM_UART1_PORT + port_number),
1770                                 &edge_port->shadow_msr, 1);
1771         if (status) {
1772                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1773                                                         __func__, status);
1774                 return status;
1775         }
1776 
1777         dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1778 
1779         /* Set Initial MCR */
1780         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1781         dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1782 
1783         edge_serial = edge_port->edge_serial;
1784         if (mutex_lock_interruptible(&edge_serial->es_lock))
1785                 return -ERESTARTSYS;
1786         if (edge_serial->num_ports_open == 0) {
1787                 /* we are the first port to open, post the interrupt urb */
1788                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1789                 if (!urb) {
1790                         dev_err(&port->dev,
1791                                 "%s - no interrupt urb present, exiting\n",
1792                                 __func__);
1793                         status = -EINVAL;
1794                         goto release_es_lock;
1795                 }
1796                 urb->context = edge_serial;
1797                 status = usb_submit_urb(urb, GFP_KERNEL);
1798                 if (status) {
1799                         dev_err(&port->dev,
1800                                 "%s - usb_submit_urb failed with value %d\n",
1801                                         __func__, status);
1802                         goto release_es_lock;
1803                 }
1804         }
1805 
1806         /*
1807          * reset the data toggle on the bulk endpoints to work around bug in
1808          * host controllers where things get out of sync some times
1809          */
1810         usb_clear_halt(dev, port->write_urb->pipe);
1811         usb_clear_halt(dev, port->read_urb->pipe);
1812 
1813         /* start up our bulk read urb */
1814         urb = port->read_urb;
1815         if (!urb) {
1816                 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1817                                                                 __func__);
1818                 status = -EINVAL;
1819                 goto unlink_int_urb;
1820         }
1821         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1822         urb->context = edge_port;
1823         status = usb_submit_urb(urb, GFP_KERNEL);
1824         if (status) {
1825                 dev_err(&port->dev,
1826                         "%s - read bulk usb_submit_urb failed with value %d\n",
1827                                 __func__, status);
1828                 goto unlink_int_urb;
1829         }
1830 
1831         ++edge_serial->num_ports_open;
1832 
1833         goto release_es_lock;
1834 
1835 unlink_int_urb:
1836         if (edge_port->edge_serial->num_ports_open == 0)
1837                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1838 release_es_lock:
1839         mutex_unlock(&edge_serial->es_lock);
1840         return status;
1841 }
1842 
1843 static void edge_close(struct usb_serial_port *port)
1844 {
1845         struct edgeport_serial *edge_serial;
1846         struct edgeport_port *edge_port;
1847         struct usb_serial *serial = port->serial;
1848         unsigned long flags;
1849         int port_number;
1850 
1851         edge_serial = usb_get_serial_data(port->serial);
1852         edge_port = usb_get_serial_port_data(port);
1853         if (edge_serial == NULL || edge_port == NULL)
1854                 return;
1855 
1856         /* The bulkreadcompletion routine will check
1857          * this flag and dump add read data */
1858         edge_port->close_pending = 1;
1859 
1860         usb_kill_urb(port->read_urb);
1861         usb_kill_urb(port->write_urb);
1862         edge_port->ep_write_urb_in_use = 0;
1863         spin_lock_irqsave(&edge_port->ep_lock, flags);
1864         kfifo_reset_out(&port->write_fifo);
1865         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1866 
1867         dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
1868         port_number = port->port_number;
1869         send_cmd(serial->dev, UMPC_CLOSE_PORT,
1870                      (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1871 
1872         mutex_lock(&edge_serial->es_lock);
1873         --edge_port->edge_serial->num_ports_open;
1874         if (edge_port->edge_serial->num_ports_open <= 0) {
1875                 /* last port is now closed, let's shut down our interrupt urb */
1876                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1877                 edge_port->edge_serial->num_ports_open = 0;
1878         }
1879         mutex_unlock(&edge_serial->es_lock);
1880         edge_port->close_pending = 0;
1881 }
1882 
1883 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1884                                 const unsigned char *data, int count)
1885 {
1886         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1887 
1888         if (count == 0) {
1889                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
1890                 return 0;
1891         }
1892 
1893         if (edge_port == NULL)
1894                 return -ENODEV;
1895         if (edge_port->close_pending == 1)
1896                 return -ENODEV;
1897 
1898         count = kfifo_in_locked(&port->write_fifo, data, count,
1899                                                         &edge_port->ep_lock);
1900         edge_send(port, tty);
1901 
1902         return count;
1903 }
1904 
1905 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
1906 {
1907         int count, result;
1908         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1909         unsigned long flags;
1910 
1911         spin_lock_irqsave(&edge_port->ep_lock, flags);
1912 
1913         if (edge_port->ep_write_urb_in_use) {
1914                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1915                 return;
1916         }
1917 
1918         count = kfifo_out(&port->write_fifo,
1919                                 port->write_urb->transfer_buffer,
1920                                 port->bulk_out_size);
1921 
1922         if (count == 0) {
1923                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1924                 return;
1925         }
1926 
1927         edge_port->ep_write_urb_in_use = 1;
1928 
1929         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1930 
1931         usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
1932 
1933         /* set up our urb */
1934         port->write_urb->transfer_buffer_length = count;
1935 
1936         /* send the data out the bulk port */
1937         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1938         if (result) {
1939                 dev_err_console(port,
1940                         "%s - failed submitting write urb, error %d\n",
1941                                 __func__, result);
1942                 edge_port->ep_write_urb_in_use = 0;
1943                 /* TODO: reschedule edge_send */
1944         } else
1945                 edge_port->port->icount.tx += count;
1946 
1947         /* wakeup any process waiting for writes to complete */
1948         /* there is now more room in the buffer for new writes */
1949         if (tty)
1950                 tty_wakeup(tty);
1951 }
1952 
1953 static int edge_write_room(struct tty_struct *tty)
1954 {
1955         struct usb_serial_port *port = tty->driver_data;
1956         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1957         int room = 0;
1958         unsigned long flags;
1959 
1960         if (edge_port == NULL)
1961                 return 0;
1962         if (edge_port->close_pending == 1)
1963                 return 0;
1964 
1965         spin_lock_irqsave(&edge_port->ep_lock, flags);
1966         room = kfifo_avail(&port->write_fifo);
1967         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1968 
1969         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1970         return room;
1971 }
1972 
1973 static int edge_chars_in_buffer(struct tty_struct *tty)
1974 {
1975         struct usb_serial_port *port = tty->driver_data;
1976         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1977         int chars = 0;
1978         unsigned long flags;
1979         if (edge_port == NULL)
1980                 return 0;
1981 
1982         spin_lock_irqsave(&edge_port->ep_lock, flags);
1983         chars = kfifo_len(&port->write_fifo);
1984         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1985 
1986         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1987         return chars;
1988 }
1989 
1990 static bool edge_tx_empty(struct usb_serial_port *port)
1991 {
1992         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1993         int ret;
1994 
1995         ret = tx_active(edge_port);
1996         if (ret > 0)
1997                 return false;
1998 
1999         return true;
2000 }
2001 
2002 static void edge_throttle(struct tty_struct *tty)
2003 {
2004         struct usb_serial_port *port = tty->driver_data;
2005         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2006         int status;
2007 
2008         if (edge_port == NULL)
2009                 return;
2010 
2011         /* if we are implementing XON/XOFF, send the stop character */
2012         if (I_IXOFF(tty)) {
2013                 unsigned char stop_char = STOP_CHAR(tty);
2014                 status = edge_write(tty, port, &stop_char, 1);
2015                 if (status <= 0) {
2016                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2017                 }
2018         }
2019 
2020         /* if we are implementing RTS/CTS, stop reads */
2021         /* and the Edgeport will clear the RTS line */
2022         if (C_CRTSCTS(tty))
2023                 stop_read(edge_port);
2024 
2025 }
2026 
2027 static void edge_unthrottle(struct tty_struct *tty)
2028 {
2029         struct usb_serial_port *port = tty->driver_data;
2030         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2031         int status;
2032 
2033         if (edge_port == NULL)
2034                 return;
2035 
2036         /* if we are implementing XON/XOFF, send the start character */
2037         if (I_IXOFF(tty)) {
2038                 unsigned char start_char = START_CHAR(tty);
2039                 status = edge_write(tty, port, &start_char, 1);
2040                 if (status <= 0) {
2041                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2042                 }
2043         }
2044         /* if we are implementing RTS/CTS, restart reads */
2045         /* are the Edgeport will assert the RTS line */
2046         if (C_CRTSCTS(tty)) {
2047                 status = restart_read(edge_port);
2048                 if (status)
2049                         dev_err(&port->dev,
2050                                 "%s - read bulk usb_submit_urb failed: %d\n",
2051                                                         __func__, status);
2052         }
2053 
2054 }
2055 
2056 static void stop_read(struct edgeport_port *edge_port)
2057 {
2058         unsigned long flags;
2059 
2060         spin_lock_irqsave(&edge_port->ep_lock, flags);
2061 
2062         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2063                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2064         edge_port->shadow_mcr &= ~MCR_RTS;
2065 
2066         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2067 }
2068 
2069 static int restart_read(struct edgeport_port *edge_port)
2070 {
2071         struct urb *urb;
2072         int status = 0;
2073         unsigned long flags;
2074 
2075         spin_lock_irqsave(&edge_port->ep_lock, flags);
2076 
2077         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2078                 urb = edge_port->port->read_urb;
2079                 status = usb_submit_urb(urb, GFP_ATOMIC);
2080         }
2081         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2082         edge_port->shadow_mcr |= MCR_RTS;
2083 
2084         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2085 
2086         return status;
2087 }
2088 
2089 static void change_port_settings(struct tty_struct *tty,
2090                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2091 {
2092         struct device *dev = &edge_port->port->dev;
2093         struct ump_uart_config *config;
2094         int baud;
2095         unsigned cflag;
2096         int status;
2097         int port_number = edge_port->port->port_number;
2098 
2099         config = kmalloc (sizeof (*config), GFP_KERNEL);
2100         if (!config) {
2101                 tty->termios = *old_termios;
2102                 return;
2103         }
2104 
2105         cflag = tty->termios.c_cflag;
2106 
2107         config->wFlags = 0;
2108 
2109         /* These flags must be set */
2110         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2111         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2112         config->bUartMode = (__u8)(edge_port->bUartMode);
2113 
2114         switch (cflag & CSIZE) {
2115         case CS5:
2116                     config->bDataBits = UMP_UART_CHAR5BITS;
2117                     dev_dbg(dev, "%s - data bits = 5\n", __func__);
2118                     break;
2119         case CS6:
2120                     config->bDataBits = UMP_UART_CHAR6BITS;
2121                     dev_dbg(dev, "%s - data bits = 6\n", __func__);
2122                     break;
2123         case CS7:
2124                     config->bDataBits = UMP_UART_CHAR7BITS;
2125                     dev_dbg(dev, "%s - data bits = 7\n", __func__);
2126                     break;
2127         default:
2128         case CS8:
2129                     config->bDataBits = UMP_UART_CHAR8BITS;
2130                     dev_dbg(dev, "%s - data bits = 8\n", __func__);
2131                             break;
2132         }
2133 
2134         if (cflag & PARENB) {
2135                 if (cflag & PARODD) {
2136                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2137                         config->bParity = UMP_UART_ODDPARITY;
2138                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2139                 } else {
2140                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2141                         config->bParity = UMP_UART_EVENPARITY;
2142                         dev_dbg(dev, "%s - parity = even\n", __func__);
2143                 }
2144         } else {
2145                 config->bParity = UMP_UART_NOPARITY;
2146                 dev_dbg(dev, "%s - parity = none\n", __func__);
2147         }
2148 
2149         if (cflag & CSTOPB) {
2150                 config->bStopBits = UMP_UART_STOPBIT2;
2151                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2152         } else {
2153                 config->bStopBits = UMP_UART_STOPBIT1;
2154                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2155         }
2156 
2157         /* figure out the flow control settings */
2158         if (cflag & CRTSCTS) {
2159                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2160                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2161                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2162         } else {
2163                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2164                 tty->hw_stopped = 0;
2165                 restart_read(edge_port);
2166         }
2167 
2168         /* if we are implementing XON/XOFF, set the start and stop
2169            character in the device */
2170         config->cXon  = START_CHAR(tty);
2171         config->cXoff = STOP_CHAR(tty);
2172 
2173         /* if we are implementing INBOUND XON/XOFF */
2174         if (I_IXOFF(tty)) {
2175                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2176                 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2177                         __func__, config->cXon, config->cXoff);
2178         } else
2179                 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2180 
2181         /* if we are implementing OUTBOUND XON/XOFF */
2182         if (I_IXON(tty)) {
2183                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2184                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2185                         __func__, config->cXon, config->cXoff);
2186         } else
2187                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2188 
2189         tty->termios.c_cflag &= ~CMSPAR;
2190 
2191         /* Round the baud rate */
2192         baud = tty_get_baud_rate(tty);
2193         if (!baud) {
2194                 /* pick a default, any default... */
2195                 baud = 9600;
2196         } else
2197                 tty_encode_baud_rate(tty, baud, baud);
2198 
2199         edge_port->baud_rate = baud;
2200         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2201 
2202         /* FIXME: Recompute actual baud from divisor here */
2203 
2204         dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2205 
2206         dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
2207         dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
2208         dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
2209         dev_dbg(dev, "bParity:     %d\n", config->bParity);
2210         dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
2211         dev_dbg(dev, "cXon:        %d\n", config->cXon);
2212         dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
2213         dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
2214 
2215         /* move the word values into big endian mode */
2216         cpu_to_be16s(&config->wFlags);
2217         cpu_to_be16s(&config->wBaudRate);
2218 
2219         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2220                                 (__u8)(UMPM_UART1_PORT + port_number),
2221                                 0, (__u8 *)config, sizeof(*config));
2222         if (status)
2223                 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2224                         __func__, status);
2225         kfree(config);
2226 }
2227 
2228 static void edge_set_termios(struct tty_struct *tty,
2229                 struct usb_serial_port *port, struct ktermios *old_termios)
2230 {
2231         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2232         unsigned int cflag;
2233 
2234         cflag = tty->termios.c_cflag;
2235 
2236         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2237                 tty->termios.c_cflag, tty->termios.c_iflag);
2238         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2239                 old_termios->c_cflag, old_termios->c_iflag);
2240 
2241         if (edge_port == NULL)
2242                 return;
2243         /* change the port settings to the new ones specified */
2244         change_port_settings(tty, edge_port, old_termios);
2245 }
2246 
2247 static int edge_tiocmset(struct tty_struct *tty,
2248                                         unsigned int set, unsigned int clear)
2249 {
2250         struct usb_serial_port *port = tty->driver_data;
2251         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2252         unsigned int mcr;
2253         unsigned long flags;
2254 
2255         spin_lock_irqsave(&edge_port->ep_lock, flags);
2256         mcr = edge_port->shadow_mcr;
2257         if (set & TIOCM_RTS)
2258                 mcr |= MCR_RTS;
2259         if (set & TIOCM_DTR)
2260                 mcr |= MCR_DTR;
2261         if (set & TIOCM_LOOP)
2262                 mcr |= MCR_LOOPBACK;
2263 
2264         if (clear & TIOCM_RTS)
2265                 mcr &= ~MCR_RTS;
2266         if (clear & TIOCM_DTR)
2267                 mcr &= ~MCR_DTR;
2268         if (clear & TIOCM_LOOP)
2269                 mcr &= ~MCR_LOOPBACK;
2270 
2271         edge_port->shadow_mcr = mcr;
2272         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2273 
2274         restore_mcr(edge_port, mcr);
2275         return 0;
2276 }
2277 
2278 static int edge_tiocmget(struct tty_struct *tty)
2279 {
2280         struct usb_serial_port *port = tty->driver_data;
2281         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2282         unsigned int result = 0;
2283         unsigned int msr;
2284         unsigned int mcr;
2285         unsigned long flags;
2286 
2287         spin_lock_irqsave(&edge_port->ep_lock, flags);
2288 
2289         msr = edge_port->shadow_msr;
2290         mcr = edge_port->shadow_mcr;
2291         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2292                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2293                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2294                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2295                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2296                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2297 
2298 
2299         dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2300         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2301 
2302         return result;
2303 }
2304 
2305 static int get_serial_info(struct edgeport_port *edge_port,
2306                                 struct serial_struct __user *retinfo)
2307 {
2308         struct serial_struct tmp;
2309         unsigned cwait;
2310 
2311         if (!retinfo)
2312                 return -EFAULT;
2313 
2314         cwait = edge_port->port->port.closing_wait;
2315         if (cwait != ASYNC_CLOSING_WAIT_NONE)
2316                 cwait = jiffies_to_msecs(cwait) / 10;
2317 
2318         memset(&tmp, 0, sizeof(tmp));
2319 
2320         tmp.type                = PORT_16550A;
2321         tmp.line                = edge_port->port->minor;
2322         tmp.port                = edge_port->port->port_number;
2323         tmp.irq                 = 0;
2324         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2325         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2326         tmp.baud_base           = 9600;
2327         tmp.close_delay         = 5*HZ;
2328         tmp.closing_wait        = cwait;
2329 
2330         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2331                 return -EFAULT;
2332         return 0;
2333 }
2334 
2335 static int edge_ioctl(struct tty_struct *tty,
2336                                         unsigned int cmd, unsigned long arg)
2337 {
2338         struct usb_serial_port *port = tty->driver_data;
2339         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2340 
2341         switch (cmd) {
2342         case TIOCGSERIAL:
2343                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
2344                 return get_serial_info(edge_port,
2345                                 (struct serial_struct __user *) arg);
2346         }
2347         return -ENOIOCTLCMD;
2348 }
2349 
2350 static void edge_break(struct tty_struct *tty, int break_state)
2351 {
2352         struct usb_serial_port *port = tty->driver_data;
2353         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2354         int status;
2355         int bv = 0;     /* Off */
2356 
2357         if (break_state == -1)
2358                 bv = 1; /* On */
2359         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2360         if (status)
2361                 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2362                         __func__, status);
2363 }
2364 
2365 static int edge_startup(struct usb_serial *serial)
2366 {
2367         struct edgeport_serial *edge_serial;
2368         int status;
2369 
2370         /* create our private serial structure */
2371         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2372         if (!edge_serial)
2373                 return -ENOMEM;
2374 
2375         mutex_init(&edge_serial->es_lock);
2376         edge_serial->serial = serial;
2377         usb_set_serial_data(serial, edge_serial);
2378 
2379         status = download_fw(edge_serial);
2380         if (status) {
2381                 kfree(edge_serial);
2382                 return status;
2383         }
2384 
2385         return 0;
2386 }
2387 
2388 static void edge_disconnect(struct usb_serial *serial)
2389 {
2390 }
2391 
2392 static void edge_release(struct usb_serial *serial)
2393 {
2394         kfree(usb_get_serial_data(serial));
2395 }
2396 
2397 static int edge_port_probe(struct usb_serial_port *port)
2398 {
2399         struct edgeport_port *edge_port;
2400         int ret;
2401 
2402         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2403         if (!edge_port)
2404                 return -ENOMEM;
2405 
2406         spin_lock_init(&edge_port->ep_lock);
2407         edge_port->port = port;
2408         edge_port->edge_serial = usb_get_serial_data(port->serial);
2409         edge_port->bUartMode = default_uart_mode;
2410 
2411         switch (port->port_number) {
2412         case 0:
2413                 edge_port->uart_base = UMPMEM_BASE_UART1;
2414                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2415                 break;
2416         case 1:
2417                 edge_port->uart_base = UMPMEM_BASE_UART2;
2418                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2419                 break;
2420         default:
2421                 dev_err(&port->dev, "unknown port number\n");
2422                 ret = -ENODEV;
2423                 goto err;
2424         }
2425 
2426         dev_dbg(&port->dev,
2427                 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2428                 __func__, port->port_number, edge_port->uart_base,
2429                 edge_port->dma_address);
2430 
2431         usb_set_serial_port_data(port, edge_port);
2432 
2433         ret = edge_create_sysfs_attrs(port);
2434         if (ret)
2435                 goto err;
2436 
2437         port->port.closing_wait = msecs_to_jiffies(closing_wait * 10);
2438         port->port.drain_delay = 1;
2439 
2440         return 0;
2441 err:
2442         kfree(edge_port);
2443 
2444         return ret;
2445 }
2446 
2447 static int edge_port_remove(struct usb_serial_port *port)
2448 {
2449         struct edgeport_port *edge_port;
2450 
2451         edge_port = usb_get_serial_port_data(port);
2452         edge_remove_sysfs_attrs(port);
2453         kfree(edge_port);
2454 
2455         return 0;
2456 }
2457 
2458 /* Sysfs Attributes */
2459 
2460 static ssize_t uart_mode_show(struct device *dev,
2461         struct device_attribute *attr, char *buf)
2462 {
2463         struct usb_serial_port *port = to_usb_serial_port(dev);
2464         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2465 
2466         return sprintf(buf, "%d\n", edge_port->bUartMode);
2467 }
2468 
2469 static ssize_t uart_mode_store(struct device *dev,
2470         struct device_attribute *attr, const char *valbuf, size_t count)
2471 {
2472         struct usb_serial_port *port = to_usb_serial_port(dev);
2473         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2474         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2475 
2476         dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2477 
2478         if (v < 256)
2479                 edge_port->bUartMode = v;
2480         else
2481                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2482 
2483         return count;
2484 }
2485 static DEVICE_ATTR_RW(uart_mode);
2486 
2487 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2488 {
2489         return device_create_file(&port->dev, &dev_attr_uart_mode);
2490 }
2491 
2492 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2493 {
2494         device_remove_file(&port->dev, &dev_attr_uart_mode);
2495         return 0;
2496 }
2497 
2498 
2499 static struct usb_serial_driver edgeport_1port_device = {
2500         .driver = {
2501                 .owner          = THIS_MODULE,
2502                 .name           = "edgeport_ti_1",
2503         },
2504         .description            = "Edgeport TI 1 port adapter",
2505         .id_table               = edgeport_1port_id_table,
2506         .num_ports              = 1,
2507         .open                   = edge_open,
2508         .close                  = edge_close,
2509         .throttle               = edge_throttle,
2510         .unthrottle             = edge_unthrottle,
2511         .attach                 = edge_startup,
2512         .disconnect             = edge_disconnect,
2513         .release                = edge_release,
2514         .port_probe             = edge_port_probe,
2515         .port_remove            = edge_port_remove,
2516         .ioctl                  = edge_ioctl,
2517         .set_termios            = edge_set_termios,
2518         .tiocmget               = edge_tiocmget,
2519         .tiocmset               = edge_tiocmset,
2520         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2521         .get_icount             = usb_serial_generic_get_icount,
2522         .write                  = edge_write,
2523         .write_room             = edge_write_room,
2524         .chars_in_buffer        = edge_chars_in_buffer,
2525         .tx_empty               = edge_tx_empty,
2526         .break_ctl              = edge_break,
2527         .read_int_callback      = edge_interrupt_callback,
2528         .read_bulk_callback     = edge_bulk_in_callback,
2529         .write_bulk_callback    = edge_bulk_out_callback,
2530 };
2531 
2532 static struct usb_serial_driver edgeport_2port_device = {
2533         .driver = {
2534                 .owner          = THIS_MODULE,
2535                 .name           = "edgeport_ti_2",
2536         },
2537         .description            = "Edgeport TI 2 port adapter",
2538         .id_table               = edgeport_2port_id_table,
2539         .num_ports              = 2,
2540         .open                   = edge_open,
2541         .close                  = edge_close,
2542         .throttle               = edge_throttle,
2543         .unthrottle             = edge_unthrottle,
2544         .attach                 = edge_startup,
2545         .disconnect             = edge_disconnect,
2546         .release                = edge_release,
2547         .port_probe             = edge_port_probe,
2548         .port_remove            = edge_port_remove,
2549         .ioctl                  = edge_ioctl,
2550         .set_termios            = edge_set_termios,
2551         .tiocmget               = edge_tiocmget,
2552         .tiocmset               = edge_tiocmset,
2553         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2554         .get_icount             = usb_serial_generic_get_icount,
2555         .write                  = edge_write,
2556         .write_room             = edge_write_room,
2557         .chars_in_buffer        = edge_chars_in_buffer,
2558         .tx_empty               = edge_tx_empty,
2559         .break_ctl              = edge_break,
2560         .read_int_callback      = edge_interrupt_callback,
2561         .read_bulk_callback     = edge_bulk_in_callback,
2562         .write_bulk_callback    = edge_bulk_out_callback,
2563 };
2564 
2565 static struct usb_serial_driver * const serial_drivers[] = {
2566         &edgeport_1port_device, &edgeport_2port_device, NULL
2567 };
2568 
2569 module_usb_serial_driver(serial_drivers, id_table_combined);
2570 
2571 MODULE_AUTHOR(DRIVER_AUTHOR);
2572 MODULE_DESCRIPTION(DRIVER_DESC);
2573 MODULE_LICENSE("GPL");
2574 MODULE_FIRMWARE("edgeport/down3.bin");
2575 
2576 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2577 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2578 
2579 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2580 MODULE_PARM_DESC(ignore_cpu_rev,
2581                         "Ignore the cpu revision when connecting to a device");
2582 
2583 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2584 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
2585 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us