Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * cpia_pp CPiA Parallel Port driver |
| 3 | * |
| 4 | * Supports CPiA based parallel port Video Camera's. |
| 5 | * |
| 6 | * (C) Copyright 1999 Bas Huisman <bhuism@cs.utwente.nl> |
| 7 | * (C) Copyright 1999-2000 Scott J. Bertin <sbertin@securenym.net>, |
| 8 | * (C) Copyright 1999-2000 Peter Pregler <Peter_Pregler@email.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | */ |
| 24 | |
| 25 | /* define _CPIA_DEBUG_ for verbose debug output (see cpia.h) */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 26 | /* #define _CPIA_DEBUG_ 1 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/init.h> |
| 31 | |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/parport.h> |
| 34 | #include <linux/interrupt.h> |
| 35 | #include <linux/delay.h> |
| 36 | #include <linux/workqueue.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/sched.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 38 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #include <linux/kmod.h> |
| 41 | |
| 42 | /* #define _CPIA_DEBUG_ define for verbose debug output */ |
| 43 | #include "cpia.h" |
| 44 | |
| 45 | static int cpia_pp_open(void *privdata); |
| 46 | static int cpia_pp_registerCallback(void *privdata, void (*cb) (void *cbdata), |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 47 | void *cbdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | static int cpia_pp_transferCmd(void *privdata, u8 *command, u8 *data); |
| 49 | static int cpia_pp_streamStart(void *privdata); |
| 50 | static int cpia_pp_streamStop(void *privdata); |
| 51 | static int cpia_pp_streamRead(void *privdata, u8 *buffer, int noblock); |
| 52 | static int cpia_pp_close(void *privdata); |
| 53 | |
| 54 | |
| 55 | #define ABOUT "Parallel port driver for Vision CPiA based cameras" |
| 56 | |
| 57 | #define PACKET_LENGTH 8 |
| 58 | |
| 59 | /* Magic numbers for defining port-device mappings */ |
| 60 | #define PPCPIA_PARPORT_UNSPEC -4 |
| 61 | #define PPCPIA_PARPORT_AUTO -3 |
| 62 | #define PPCPIA_PARPORT_OFF -2 |
| 63 | #define PPCPIA_PARPORT_NONE -1 |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | static int parport_nr[PARPORT_MAX] = {[0 ... PARPORT_MAX - 1] = PPCPIA_PARPORT_UNSPEC}; |
| 66 | static char *parport[PARPORT_MAX] = {NULL,}; |
| 67 | |
| 68 | MODULE_AUTHOR("B. Huisman <bhuism@cs.utwente.nl> & Peter Pregler <Peter_Pregler@email.com>"); |
| 69 | MODULE_DESCRIPTION("Parallel port driver for Vision CPiA based cameras"); |
| 70 | MODULE_LICENSE("GPL"); |
| 71 | |
| 72 | module_param_array(parport, charp, NULL, 0); |
| 73 | MODULE_PARM_DESC(parport, "'auto' or a list of parallel port numbers. Just like lp."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | struct pp_cam_entry { |
| 76 | struct pardevice *pdev; |
| 77 | struct parport *port; |
| 78 | struct work_struct cb_task; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 79 | void (*cb_func)(void *cbdata); |
| 80 | void *cb_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | int open_count; |
| 82 | wait_queue_head_t wq_stream; |
| 83 | /* image state flags */ |
| 84 | int image_ready; /* we got an interrupt */ |
| 85 | int image_complete; /* we have seen 4 EOI */ |
| 86 | |
| 87 | int streaming; /* we are in streaming mode */ |
| 88 | int stream_irq; |
| 89 | }; |
| 90 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 91 | static struct cpia_camera_ops cpia_pp_ops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | { |
| 93 | cpia_pp_open, |
| 94 | cpia_pp_registerCallback, |
| 95 | cpia_pp_transferCmd, |
| 96 | cpia_pp_streamStart, |
| 97 | cpia_pp_streamStop, |
| 98 | cpia_pp_streamRead, |
| 99 | cpia_pp_close, |
| 100 | 1, |
| 101 | THIS_MODULE |
| 102 | }; |
| 103 | |
| 104 | static LIST_HEAD(cam_list); |
| 105 | static spinlock_t cam_list_lock_pp; |
| 106 | |
| 107 | /* FIXME */ |
| 108 | static void cpia_parport_enable_irq( struct parport *port ) { |
| 109 | parport_enable_irq(port); |
| 110 | mdelay(10); |
| 111 | return; |
| 112 | } |
| 113 | |
| 114 | static void cpia_parport_disable_irq( struct parport *port ) { |
| 115 | parport_disable_irq(port); |
| 116 | mdelay(10); |
| 117 | return; |
| 118 | } |
| 119 | |
| 120 | /* Special CPiA PPC modes: These are invoked by using the 1284 Extensibility |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 121 | * Link Flag during negotiation */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | #define UPLOAD_FLAG 0x08 |
| 123 | #define NIBBLE_TRANSFER 0x01 |
| 124 | #define ECP_TRANSFER 0x03 |
| 125 | |
| 126 | #define PARPORT_CHUNK_SIZE PAGE_SIZE |
| 127 | |
| 128 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 129 | static void cpia_pp_run_callback(struct work_struct *work) |
| 130 | { |
| 131 | void (*cb_func)(void *cbdata); |
| 132 | void *cb_data; |
| 133 | struct pp_cam_entry *cam; |
| 134 | |
| 135 | cam = container_of(work, struct pp_cam_entry, cb_task); |
| 136 | cb_func = cam->cb_func; |
| 137 | cb_data = cam->cb_data; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 138 | |
| 139 | cb_func(cb_data); |
| 140 | } |
| 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | /**************************************************************************** |
| 143 | * |
| 144 | * CPiA-specific low-level parport functions for nibble uploads |
| 145 | * |
| 146 | ***************************************************************************/ |
| 147 | /* CPiA nonstandard "Nibble" mode (no nDataAvail signal after each byte). */ |
| 148 | /* The standard kernel parport_ieee1284_read_nibble() fails with the CPiA... */ |
| 149 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 150 | static size_t cpia_read_nibble (struct parport *port, |
| 151 | void *buffer, size_t len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | int flags) |
| 153 | { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 154 | /* adapted verbatim, with one change, from |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | parport_ieee1284_read_nibble() in drivers/parport/ieee1284-ops.c */ |
| 156 | |
| 157 | unsigned char *buf = buffer; |
| 158 | int i; |
| 159 | unsigned char byte = 0; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | len *= 2; /* in nibbles */ |
| 162 | for (i=0; i < len; i++) { |
| 163 | unsigned char nibble; |
| 164 | |
| 165 | /* The CPiA firmware suppresses the use of nDataAvail (nFault LO) |
| 166 | * after every second nibble to signal that more |
| 167 | * data is available. (the total number of Bytes that |
| 168 | * should be sent is known; if too few are received, an error |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 169 | * will be recorded after a timeout). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | * This is incompatible with parport_ieee1284_read_nibble(), |
| 171 | * which expects to find nFault LO after every second nibble. |
| 172 | */ |
| 173 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 174 | /* Solution: modify cpia_read_nibble to only check for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | * nDataAvail before the first nibble is sent. |
| 176 | */ |
| 177 | |
| 178 | /* Does the error line indicate end of data? */ |
| 179 | if (((i /*& 1*/) == 0) && |
| 180 | (parport_read_status(port) & PARPORT_STATUS_ERROR)) { |
Marko Kohtala | 742ec65 | 2006-01-06 00:19:44 -0800 | [diff] [blame] | 181 | DBG("%s: No more nibble data (%d bytes)\n", |
| 182 | port->name, i/2); |
| 183 | goto end_of_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | /* Event 7: Set nAutoFd low. */ |
| 187 | parport_frob_control (port, |
| 188 | PARPORT_CONTROL_AUTOFD, |
| 189 | PARPORT_CONTROL_AUTOFD); |
| 190 | |
| 191 | /* Event 9: nAck goes low. */ |
| 192 | port->ieee1284.phase = IEEE1284_PH_REV_DATA; |
| 193 | if (parport_wait_peripheral (port, |
| 194 | PARPORT_STATUS_ACK, 0)) { |
| 195 | /* Timeout -- no more data? */ |
| 196 | DBG("%s: Nibble timeout at event 9 (%d bytes)\n", |
| 197 | port->name, i/2); |
| 198 | parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); |
| 199 | break; |
| 200 | } |
| 201 | |
| 202 | |
| 203 | /* Read a nibble. */ |
| 204 | nibble = parport_read_status (port) >> 3; |
| 205 | nibble &= ~8; |
| 206 | if ((nibble & 0x10) == 0) |
| 207 | nibble |= 8; |
| 208 | nibble &= 0xf; |
| 209 | |
| 210 | /* Event 10: Set nAutoFd high. */ |
| 211 | parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); |
| 212 | |
| 213 | /* Event 11: nAck goes high. */ |
| 214 | if (parport_wait_peripheral (port, |
| 215 | PARPORT_STATUS_ACK, |
| 216 | PARPORT_STATUS_ACK)) { |
| 217 | /* Timeout -- no more data? */ |
| 218 | DBG("%s: Nibble timeout at event 11\n", |
| 219 | port->name); |
| 220 | break; |
| 221 | } |
| 222 | |
| 223 | if (i & 1) { |
| 224 | /* Second nibble */ |
| 225 | byte |= nibble << 4; |
| 226 | *buf++ = byte; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 227 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | byte = nibble; |
| 229 | } |
| 230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | if (i == len) { |
| 232 | /* Read the last nibble without checking data avail. */ |
Marko Kohtala | 742ec65 | 2006-01-06 00:19:44 -0800 | [diff] [blame] | 233 | if (parport_read_status (port) & PARPORT_STATUS_ERROR) { |
| 234 | end_of_data: |
| 235 | /* Go to reverse idle phase. */ |
| 236 | parport_frob_control (port, |
| 237 | PARPORT_CONTROL_AUTOFD, |
| 238 | PARPORT_CONTROL_AUTOFD); |
| 239 | port->physport->ieee1284.phase = IEEE1284_PH_REV_IDLE; |
| 240 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | else |
Marko Kohtala | 742ec65 | 2006-01-06 00:19:44 -0800 | [diff] [blame] | 242 | port->physport->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
| 244 | |
Marko Kohtala | 742ec65 | 2006-01-06 00:19:44 -0800 | [diff] [blame] | 245 | return i/2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | /* CPiA nonstandard "Nibble Stream" mode (2 nibbles per cycle, instead of 1) |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 249 | * (See CPiA Data sheet p. 31) |
| 250 | * |
| 251 | * "Nibble Stream" mode used by CPiA for uploads to non-ECP ports is a |
| 252 | * nonstandard variant of nibble mode which allows the same (mediocre) |
| 253 | * data flow of 8 bits per cycle as software-enabled ECP by TRISTATE-capable |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | * parallel ports, but works also for non-TRISTATE-capable ports. |
| 255 | * (Standard nibble mode only send 4 bits per cycle) |
| 256 | * |
| 257 | */ |
| 258 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 259 | static size_t cpia_read_nibble_stream(struct parport *port, |
| 260 | void *buffer, size_t len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | int flags) |
| 262 | { |
| 263 | int i; |
| 264 | unsigned char *buf = buffer; |
| 265 | int endseen = 0; |
| 266 | |
| 267 | for (i=0; i < len; i++) { |
| 268 | unsigned char nibble[2], byte = 0; |
| 269 | int j; |
| 270 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 271 | /* Image Data is complete when 4 consecutive EOI bytes (0xff) are seen */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | if (endseen > 3 ) |
| 273 | break; |
| 274 | |
| 275 | /* Event 7: Set nAutoFd low. */ |
| 276 | parport_frob_control (port, |
| 277 | PARPORT_CONTROL_AUTOFD, |
| 278 | PARPORT_CONTROL_AUTOFD); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | /* Event 9: nAck goes low. */ |
| 281 | port->ieee1284.phase = IEEE1284_PH_REV_DATA; |
| 282 | if (parport_wait_peripheral (port, |
| 283 | PARPORT_STATUS_ACK, 0)) { |
| 284 | /* Timeout -- no more data? */ |
| 285 | DBG("%s: Nibble timeout at event 9 (%d bytes)\n", |
| 286 | port->name, i/2); |
| 287 | parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); |
| 288 | break; |
| 289 | } |
| 290 | |
| 291 | /* Read lower nibble */ |
| 292 | nibble[0] = parport_read_status (port) >>3; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | /* Event 10: Set nAutoFd high. */ |
| 295 | parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); |
| 296 | |
| 297 | /* Event 11: nAck goes high. */ |
| 298 | if (parport_wait_peripheral (port, |
| 299 | PARPORT_STATUS_ACK, |
| 300 | PARPORT_STATUS_ACK)) { |
| 301 | /* Timeout -- no more data? */ |
| 302 | DBG("%s: Nibble timeout at event 11\n", |
| 303 | port->name); |
| 304 | break; |
| 305 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | /* Read upper nibble */ |
| 308 | nibble[1] = parport_read_status (port) >>3; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | /* reassemble the byte */ |
| 311 | for (j = 0; j < 2 ; j++ ) { |
| 312 | nibble[j] &= ~8; |
| 313 | if ((nibble[j] & 0x10) == 0) |
| 314 | nibble[j] |= 8; |
| 315 | nibble[j] &= 0xf; |
| 316 | } |
| 317 | byte = (nibble[0] |(nibble[1] << 4)); |
| 318 | *buf++ = byte; |
| 319 | |
| 320 | if(byte == EOI) |
| 321 | endseen++; |
| 322 | else |
| 323 | endseen = 0; |
| 324 | } |
| 325 | return i; |
| 326 | } |
| 327 | |
| 328 | /**************************************************************************** |
| 329 | * |
| 330 | * EndTransferMode |
| 331 | * |
| 332 | ***************************************************************************/ |
| 333 | static void EndTransferMode(struct pp_cam_entry *cam) |
| 334 | { |
| 335 | parport_negotiate(cam->port, IEEE1284_MODE_COMPAT); |
| 336 | } |
| 337 | |
| 338 | /**************************************************************************** |
| 339 | * |
| 340 | * ForwardSetup |
| 341 | * |
| 342 | ***************************************************************************/ |
| 343 | static int ForwardSetup(struct pp_cam_entry *cam) |
| 344 | { |
| 345 | int retry; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 346 | |
| 347 | /* The CPiA uses ECP protocol for Downloads from the Host to the camera. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | * This will be software-emulated if ECP hardware is not present |
| 349 | */ |
| 350 | |
| 351 | /* the usual camera maximum response time is 10ms, but after receiving |
| 352 | * some commands, it needs up to 40ms. (Data Sheet p. 32)*/ |
| 353 | |
| 354 | for(retry = 0; retry < 4; ++retry) { |
| 355 | if(!parport_negotiate(cam->port, IEEE1284_MODE_ECP)) { |
| 356 | break; |
| 357 | } |
| 358 | mdelay(10); |
| 359 | } |
| 360 | if(retry == 4) { |
| 361 | DBG("Unable to negotiate IEEE1284 ECP Download mode\n"); |
| 362 | return -1; |
| 363 | } |
| 364 | return 0; |
| 365 | } |
| 366 | /**************************************************************************** |
| 367 | * |
| 368 | * ReverseSetup |
| 369 | * |
| 370 | ***************************************************************************/ |
| 371 | static int ReverseSetup(struct pp_cam_entry *cam, int extensibility) |
| 372 | { |
| 373 | int retry; |
| 374 | int upload_mode, mode = IEEE1284_MODE_ECP; |
| 375 | int transfer_mode = ECP_TRANSFER; |
| 376 | |
| 377 | if (!(cam->port->modes & PARPORT_MODE_ECP) && |
| 378 | !(cam->port->modes & PARPORT_MODE_TRISTATE)) { |
| 379 | mode = IEEE1284_MODE_NIBBLE; |
| 380 | transfer_mode = NIBBLE_TRANSFER; |
| 381 | } |
| 382 | |
| 383 | upload_mode = mode; |
| 384 | if(extensibility) mode = UPLOAD_FLAG|transfer_mode|IEEE1284_EXT_LINK; |
| 385 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 386 | /* the usual camera maximum response time is 10ms, but after |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | * receiving some commands, it needs up to 40ms. */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | for(retry = 0; retry < 4; ++retry) { |
| 390 | if(!parport_negotiate(cam->port, mode)) { |
| 391 | break; |
| 392 | } |
| 393 | mdelay(10); |
| 394 | } |
| 395 | if(retry == 4) { |
| 396 | if(extensibility) |
| 397 | DBG("Unable to negotiate upload extensibility mode\n"); |
| 398 | else |
| 399 | DBG("Unable to negotiate upload mode\n"); |
| 400 | return -1; |
| 401 | } |
| 402 | if(extensibility) cam->port->ieee1284.mode = upload_mode; |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | /**************************************************************************** |
| 407 | * |
| 408 | * WritePacket |
| 409 | * |
| 410 | ***************************************************************************/ |
| 411 | static int WritePacket(struct pp_cam_entry *cam, const u8 *packet, size_t size) |
| 412 | { |
| 413 | int retval=0; |
| 414 | int size_written; |
| 415 | |
| 416 | if (packet == NULL) { |
| 417 | return -EINVAL; |
| 418 | } |
| 419 | if (ForwardSetup(cam)) { |
| 420 | DBG("Write failed in setup\n"); |
| 421 | return -EIO; |
| 422 | } |
| 423 | size_written = parport_write(cam->port, packet, size); |
| 424 | if(size_written != size) { |
| 425 | DBG("Write failed, wrote %d/%d\n", size_written, size); |
| 426 | retval = -EIO; |
| 427 | } |
| 428 | EndTransferMode(cam); |
| 429 | return retval; |
| 430 | } |
| 431 | |
| 432 | /**************************************************************************** |
| 433 | * |
| 434 | * ReadPacket |
| 435 | * |
| 436 | ***************************************************************************/ |
| 437 | static int ReadPacket(struct pp_cam_entry *cam, u8 *packet, size_t size) |
| 438 | { |
| 439 | int retval=0; |
| 440 | |
| 441 | if (packet == NULL) { |
| 442 | return -EINVAL; |
| 443 | } |
| 444 | if (ReverseSetup(cam, 0)) { |
| 445 | return -EIO; |
| 446 | } |
| 447 | |
| 448 | /* support for CPiA variant nibble reads */ |
| 449 | if(cam->port->ieee1284.mode == IEEE1284_MODE_NIBBLE) { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 450 | if(cpia_read_nibble(cam->port, packet, size, 0) != size) |
| 451 | retval = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } else { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 453 | if(parport_read(cam->port, packet, size) != size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | retval = -EIO; |
| 455 | } |
| 456 | EndTransferMode(cam); |
| 457 | return retval; |
| 458 | } |
| 459 | |
| 460 | /**************************************************************************** |
| 461 | * |
| 462 | * cpia_pp_streamStart |
| 463 | * |
| 464 | ***************************************************************************/ |
| 465 | static int cpia_pp_streamStart(void *privdata) |
| 466 | { |
| 467 | struct pp_cam_entry *cam = privdata; |
| 468 | DBG("\n"); |
| 469 | cam->streaming=1; |
| 470 | cam->image_ready=0; |
| 471 | //if (ReverseSetup(cam,1)) return -EIO; |
| 472 | if(cam->stream_irq) cpia_parport_enable_irq(cam->port); |
| 473 | return 0; |
| 474 | } |
| 475 | |
| 476 | /**************************************************************************** |
| 477 | * |
| 478 | * cpia_pp_streamStop |
| 479 | * |
| 480 | ***************************************************************************/ |
| 481 | static int cpia_pp_streamStop(void *privdata) |
| 482 | { |
| 483 | struct pp_cam_entry *cam = privdata; |
| 484 | |
| 485 | DBG("\n"); |
| 486 | cam->streaming=0; |
| 487 | cpia_parport_disable_irq(cam->port); |
| 488 | //EndTransferMode(cam); |
| 489 | |
| 490 | return 0; |
| 491 | } |
| 492 | |
| 493 | /**************************************************************************** |
| 494 | * |
| 495 | * cpia_pp_streamRead |
| 496 | * |
| 497 | ***************************************************************************/ |
| 498 | static int cpia_pp_read(struct parport *port, u8 *buffer, int len) |
| 499 | { |
| 500 | int bytes_read; |
| 501 | |
| 502 | /* support for CPiA variant "nibble stream" reads */ |
| 503 | if(port->ieee1284.mode == IEEE1284_MODE_NIBBLE) |
| 504 | bytes_read = cpia_read_nibble_stream(port,buffer,len,0); |
| 505 | else { |
| 506 | int new_bytes; |
| 507 | for(bytes_read=0; bytes_read<len; bytes_read += new_bytes) { |
| 508 | new_bytes = parport_read(port, buffer+bytes_read, |
| 509 | len-bytes_read); |
| 510 | if(new_bytes < 0) break; |
| 511 | } |
| 512 | } |
| 513 | return bytes_read; |
| 514 | } |
| 515 | |
| 516 | static int cpia_pp_streamRead(void *privdata, u8 *buffer, int noblock) |
| 517 | { |
| 518 | struct pp_cam_entry *cam = privdata; |
| 519 | int read_bytes = 0; |
| 520 | int i, endseen, block_size, new_bytes; |
| 521 | |
| 522 | if(cam == NULL) { |
| 523 | DBG("Internal driver error: cam is NULL\n"); |
| 524 | return -EINVAL; |
| 525 | } |
| 526 | if(buffer == NULL) { |
| 527 | DBG("Internal driver error: buffer is NULL\n"); |
| 528 | return -EINVAL; |
| 529 | } |
| 530 | //if(cam->streaming) DBG("%d / %d\n", cam->image_ready, noblock); |
| 531 | if( cam->stream_irq ) { |
| 532 | DBG("%d\n", cam->image_ready); |
| 533 | cam->image_ready--; |
| 534 | } |
| 535 | cam->image_complete=0; |
| 536 | if (0/*cam->streaming*/) { |
| 537 | if(!cam->image_ready) { |
| 538 | if(noblock) return -EWOULDBLOCK; |
| 539 | interruptible_sleep_on(&cam->wq_stream); |
| 540 | if( signal_pending(current) ) return -EINTR; |
| 541 | DBG("%d\n", cam->image_ready); |
| 542 | } |
| 543 | } else { |
| 544 | if (ReverseSetup(cam, 1)) { |
| 545 | DBG("unable to ReverseSetup\n"); |
| 546 | return -EIO; |
| 547 | } |
| 548 | } |
| 549 | endseen = 0; |
| 550 | block_size = PARPORT_CHUNK_SIZE; |
| 551 | while( !cam->image_complete ) { |
| 552 | cond_resched(); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 553 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | new_bytes = cpia_pp_read(cam->port, buffer, block_size ); |
| 555 | if( new_bytes <= 0 ) { |
| 556 | break; |
| 557 | } |
| 558 | i=-1; |
| 559 | while(++i<new_bytes && endseen<4) { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 560 | if(*buffer==EOI) { |
| 561 | endseen++; |
| 562 | } else { |
| 563 | endseen=0; |
| 564 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | buffer++; |
| 566 | } |
| 567 | read_bytes += i; |
| 568 | if( endseen==4 ) { |
| 569 | cam->image_complete=1; |
| 570 | break; |
| 571 | } |
| 572 | if( CPIA_MAX_IMAGE_SIZE-read_bytes <= PARPORT_CHUNK_SIZE ) { |
| 573 | block_size=CPIA_MAX_IMAGE_SIZE-read_bytes; |
| 574 | } |
| 575 | } |
| 576 | EndTransferMode(cam); |
| 577 | return cam->image_complete ? read_bytes : -EIO; |
| 578 | } |
| 579 | /**************************************************************************** |
| 580 | * |
| 581 | * cpia_pp_transferCmd |
| 582 | * |
| 583 | ***************************************************************************/ |
| 584 | static int cpia_pp_transferCmd(void *privdata, u8 *command, u8 *data) |
| 585 | { |
| 586 | int err; |
| 587 | int retval=0; |
| 588 | int databytes; |
| 589 | struct pp_cam_entry *cam = privdata; |
| 590 | |
| 591 | if(cam == NULL) { |
| 592 | DBG("Internal driver error: cam is NULL\n"); |
| 593 | return -EINVAL; |
| 594 | } |
| 595 | if(command == NULL) { |
| 596 | DBG("Internal driver error: command is NULL\n"); |
| 597 | return -EINVAL; |
| 598 | } |
| 599 | databytes = (((int)command[7])<<8) | command[6]; |
| 600 | if ((err = WritePacket(cam, command, PACKET_LENGTH)) < 0) { |
| 601 | DBG("Error writing command\n"); |
| 602 | return err; |
| 603 | } |
| 604 | if(command[0] == DATA_IN) { |
| 605 | u8 buffer[8]; |
| 606 | if(data == NULL) { |
| 607 | DBG("Internal driver error: data is NULL\n"); |
| 608 | return -EINVAL; |
| 609 | } |
| 610 | if((err = ReadPacket(cam, buffer, 8)) < 0) { |
| 611 | DBG("Error reading command result\n"); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 612 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
| 614 | memcpy(data, buffer, databytes); |
| 615 | } else if(command[0] == DATA_OUT) { |
| 616 | if(databytes > 0) { |
| 617 | if(data == NULL) { |
| 618 | DBG("Internal driver error: data is NULL\n"); |
| 619 | retval = -EINVAL; |
| 620 | } else { |
| 621 | if((err=WritePacket(cam, data, databytes)) < 0){ |
| 622 | DBG("Error writing command data\n"); |
| 623 | return err; |
| 624 | } |
| 625 | } |
| 626 | } |
| 627 | } else { |
| 628 | DBG("Unexpected first byte of command: %x\n", command[0]); |
| 629 | retval = -EINVAL; |
| 630 | } |
| 631 | return retval; |
| 632 | } |
| 633 | |
| 634 | /**************************************************************************** |
| 635 | * |
| 636 | * cpia_pp_open |
| 637 | * |
| 638 | ***************************************************************************/ |
| 639 | static int cpia_pp_open(void *privdata) |
| 640 | { |
| 641 | struct pp_cam_entry *cam = (struct pp_cam_entry *)privdata; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | if (cam == NULL) |
| 644 | return -EINVAL; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 645 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | if(cam->open_count == 0) { |
| 647 | if (parport_claim(cam->pdev)) { |
| 648 | DBG("failed to claim the port\n"); |
| 649 | return -EBUSY; |
| 650 | } |
| 651 | parport_negotiate(cam->port, IEEE1284_MODE_COMPAT); |
| 652 | parport_data_forward(cam->port); |
| 653 | parport_write_control(cam->port, PARPORT_CONTROL_SELECT); |
| 654 | udelay(50); |
| 655 | parport_write_control(cam->port, |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 656 | PARPORT_CONTROL_SELECT |
| 657 | | PARPORT_CONTROL_INIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | ++cam->open_count; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | return 0; |
| 663 | } |
| 664 | |
| 665 | /**************************************************************************** |
| 666 | * |
| 667 | * cpia_pp_registerCallback |
| 668 | * |
| 669 | ***************************************************************************/ |
| 670 | static int cpia_pp_registerCallback(void *privdata, void (*cb)(void *cbdata), void *cbdata) |
| 671 | { |
| 672 | struct pp_cam_entry *cam = privdata; |
| 673 | int retval = 0; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | if(cam->port->irq != PARPORT_IRQ_NONE) { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 676 | cam->cb_func = cb; |
| 677 | cam->cb_data = cbdata; |
Oleg Nesterov | 5cdc178 | 2007-03-09 17:43:39 -0300 | [diff] [blame] | 678 | INIT_WORK(&cam->cb_task, cpia_pp_run_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | } else { |
| 680 | retval = -1; |
| 681 | } |
| 682 | return retval; |
| 683 | } |
| 684 | |
| 685 | /**************************************************************************** |
| 686 | * |
| 687 | * cpia_pp_close |
| 688 | * |
| 689 | ***************************************************************************/ |
| 690 | static int cpia_pp_close(void *privdata) |
| 691 | { |
| 692 | struct pp_cam_entry *cam = privdata; |
| 693 | if (--cam->open_count == 0) { |
| 694 | parport_release(cam->pdev); |
| 695 | } |
| 696 | return 0; |
| 697 | } |
| 698 | |
| 699 | /**************************************************************************** |
| 700 | * |
| 701 | * cpia_pp_register |
| 702 | * |
| 703 | ***************************************************************************/ |
| 704 | static int cpia_pp_register(struct parport *port) |
| 705 | { |
| 706 | struct pardevice *pdev = NULL; |
| 707 | struct pp_cam_entry *cam; |
| 708 | struct cam_data *cpia; |
| 709 | |
| 710 | if (!(port->modes & PARPORT_MODE_PCSPP)) { |
| 711 | LOG("port is not supported by CPiA driver\n"); |
| 712 | return -ENXIO; |
| 713 | } |
| 714 | |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 715 | cam = kzalloc(sizeof(struct pp_cam_entry), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | if (cam == NULL) { |
| 717 | LOG("failed to allocate camera structure\n"); |
| 718 | return -ENOMEM; |
| 719 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | pdev = parport_register_device(port, "cpia_pp", NULL, NULL, |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 722 | NULL, 0, cam); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
| 724 | if (!pdev) { |
| 725 | LOG("failed to parport_register_device\n"); |
| 726 | kfree(cam); |
| 727 | return -ENXIO; |
| 728 | } |
| 729 | |
| 730 | cam->pdev = pdev; |
| 731 | cam->port = port; |
| 732 | init_waitqueue_head(&cam->wq_stream); |
| 733 | |
| 734 | cam->streaming = 0; |
| 735 | cam->stream_irq = 0; |
| 736 | |
| 737 | if((cpia = cpia_register_camera(&cpia_pp_ops, cam)) == NULL) { |
| 738 | LOG("failed to cpia_register_camera\n"); |
| 739 | parport_unregister_device(pdev); |
| 740 | kfree(cam); |
| 741 | return -ENXIO; |
| 742 | } |
| 743 | spin_lock( &cam_list_lock_pp ); |
| 744 | list_add( &cpia->cam_data_list, &cam_list ); |
| 745 | spin_unlock( &cam_list_lock_pp ); |
| 746 | |
| 747 | return 0; |
| 748 | } |
| 749 | |
| 750 | static void cpia_pp_detach (struct parport *port) |
| 751 | { |
| 752 | struct list_head *tmp; |
| 753 | struct cam_data *cpia = NULL; |
| 754 | struct pp_cam_entry *cam; |
| 755 | |
| 756 | spin_lock( &cam_list_lock_pp ); |
| 757 | list_for_each (tmp, &cam_list) { |
| 758 | cpia = list_entry(tmp, struct cam_data, cam_data_list); |
| 759 | cam = (struct pp_cam_entry *) cpia->lowlevel_data; |
| 760 | if (cam && cam->port->number == port->number) { |
| 761 | list_del(&cpia->cam_data_list); |
| 762 | break; |
| 763 | } |
| 764 | cpia = NULL; |
| 765 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 766 | spin_unlock( &cam_list_lock_pp ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | |
| 768 | if (!cpia) { |
| 769 | DBG("cpia_pp_detach failed to find cam_data in cam_list\n"); |
| 770 | return; |
| 771 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 772 | |
| 773 | cam = (struct pp_cam_entry *) cpia->lowlevel_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | cpia_unregister_camera(cpia); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 775 | if(cam->open_count > 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | cpia_pp_close(cam); |
| 777 | parport_unregister_device(cam->pdev); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 778 | cpia->lowlevel_data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | kfree(cam); |
| 780 | } |
| 781 | |
| 782 | static void cpia_pp_attach (struct parport *port) |
| 783 | { |
| 784 | unsigned int i; |
| 785 | |
| 786 | switch (parport_nr[0]) |
| 787 | { |
| 788 | case PPCPIA_PARPORT_UNSPEC: |
| 789 | case PPCPIA_PARPORT_AUTO: |
| 790 | if (port->probe_info[0].class != PARPORT_CLASS_MEDIA || |
| 791 | port->probe_info[0].cmdset == NULL || |
| 792 | strncmp(port->probe_info[0].cmdset, "CPIA_1", 6) != 0) |
| 793 | return; |
| 794 | |
| 795 | cpia_pp_register(port); |
| 796 | |
| 797 | break; |
| 798 | |
| 799 | default: |
| 800 | for (i = 0; i < PARPORT_MAX; ++i) { |
| 801 | if (port->number == parport_nr[i]) { |
| 802 | cpia_pp_register(port); |
| 803 | break; |
| 804 | } |
| 805 | } |
| 806 | break; |
| 807 | } |
| 808 | } |
| 809 | |
| 810 | static struct parport_driver cpia_pp_driver = { |
| 811 | .name = "cpia_pp", |
| 812 | .attach = cpia_pp_attach, |
| 813 | .detach = cpia_pp_detach, |
| 814 | }; |
| 815 | |
Adrian Bunk | 9ab7e32 | 2007-03-25 12:14:38 -0300 | [diff] [blame] | 816 | static int __init cpia_pp_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 818 | printk(KERN_INFO "%s v%d.%d.%d\n",ABOUT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | CPIA_PP_MAJ_VER,CPIA_PP_MIN_VER,CPIA_PP_PATCH_VER); |
| 820 | |
| 821 | if(parport_nr[0] == PPCPIA_PARPORT_OFF) { |
| 822 | printk(" disabled\n"); |
| 823 | return 0; |
| 824 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 825 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | spin_lock_init( &cam_list_lock_pp ); |
| 827 | |
| 828 | if (parport_register_driver (&cpia_pp_driver)) { |
| 829 | LOG ("unable to register with parport\n"); |
| 830 | return -EIO; |
| 831 | } |
| 832 | return 0; |
| 833 | } |
| 834 | |
Adrian Bunk | 9ab7e32 | 2007-03-25 12:14:38 -0300 | [diff] [blame] | 835 | static int __init cpia_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | { |
| 837 | if (parport[0]) { |
| 838 | /* The user gave some parameters. Let's see what they were. */ |
| 839 | if (!strncmp(parport[0], "auto", 4)) { |
| 840 | parport_nr[0] = PPCPIA_PARPORT_AUTO; |
| 841 | } else { |
| 842 | int n; |
| 843 | for (n = 0; n < PARPORT_MAX && parport[n]; n++) { |
| 844 | if (!strncmp(parport[n], "none", 4)) { |
| 845 | parport_nr[n] = PPCPIA_PARPORT_NONE; |
| 846 | } else { |
| 847 | char *ep; |
| 848 | unsigned long r = simple_strtoul(parport[n], &ep, 0); |
| 849 | if (ep != parport[n]) { |
| 850 | parport_nr[n] = r; |
| 851 | } else { |
| 852 | LOG("bad port specifier `%s'\n", parport[n]); |
| 853 | return -ENODEV; |
| 854 | } |
| 855 | } |
| 856 | } |
| 857 | } |
| 858 | } |
| 859 | return cpia_pp_init(); |
| 860 | } |
| 861 | |
Adrian Bunk | 9ab7e32 | 2007-03-25 12:14:38 -0300 | [diff] [blame] | 862 | static void __exit cpia_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | { |
Adrian Bunk | 9ab7e32 | 2007-03-25 12:14:38 -0300 | [diff] [blame] | 864 | parport_unregister_driver(&cpia_pp_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | return; |
| 866 | } |
| 867 | |
Adrian Bunk | 9ab7e32 | 2007-03-25 12:14:38 -0300 | [diff] [blame] | 868 | module_init(cpia_init); |
| 869 | module_exit(cpia_cleanup); |