Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 1 | /* |
| 2 | * |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2005 Mike Isely <isely@pobox.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | * |
| 19 | */ |
| 20 | |
Mike Isely | 59af336 | 2009-03-07 03:06:09 -0300 | [diff] [blame] | 21 | #include <linux/i2c.h> |
Paul Gortmaker | 7a707b8 | 2011-07-03 14:03:12 -0400 | [diff] [blame] | 22 | #include <linux/module.h> |
Andy Walls | 4999e27 | 2011-01-16 21:21:03 -0300 | [diff] [blame] | 23 | #include <media/ir-kbd-i2c.h> |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 24 | #include "pvrusb2-i2c-core.h" |
| 25 | #include "pvrusb2-hdw-internal.h" |
| 26 | #include "pvrusb2-debug.h" |
Michael Krufky | 8d36436 | 2007-01-22 02:17:55 -0300 | [diff] [blame] | 27 | #include "pvrusb2-fx2-cmd.h" |
Mike Isely | 5c808e6 | 2007-04-28 20:11:03 -0300 | [diff] [blame] | 28 | #include "pvrusb2.h" |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 29 | |
| 30 | #define trace_i2c(...) pvr2_trace(PVR2_TRACE_I2C,__VA_ARGS__) |
| 31 | |
| 32 | /* |
| 33 | |
| 34 | This module attempts to implement a compliant I2C adapter for the pvrusb2 |
Mike Isely | 59af336 | 2009-03-07 03:06:09 -0300 | [diff] [blame] | 35 | device. |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 36 | |
| 37 | */ |
| 38 | |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame] | 39 | static unsigned int i2c_scan; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 40 | module_param(i2c_scan, int, S_IRUGO|S_IWUSR); |
| 41 | MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time"); |
| 42 | |
Mike Isely | 5c808e6 | 2007-04-28 20:11:03 -0300 | [diff] [blame] | 43 | static int ir_mode[PVR_NUM] = { [0 ... PVR_NUM-1] = 1 }; |
| 44 | module_param_array(ir_mode, int, NULL, 0444); |
| 45 | MODULE_PARM_DESC(ir_mode,"specify: 0=disable IR reception, 1=normal IR"); |
| 46 | |
Jean Delvare | 7e11118 | 2009-05-13 16:56:20 -0300 | [diff] [blame] | 47 | static int pvr2_disable_ir_video; |
Mike Isely | cd85b7a | 2009-05-01 22:23:39 -0300 | [diff] [blame] | 48 | module_param_named(disable_autoload_ir_video, pvr2_disable_ir_video, |
| 49 | int, S_IRUGO|S_IWUSR); |
| 50 | MODULE_PARM_DESC(disable_autoload_ir_video, |
| 51 | "1=do not try to autoload ir_video IR receiver"); |
| 52 | |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 53 | static int pvr2_i2c_write(struct pvr2_hdw *hdw, /* Context */ |
| 54 | u8 i2c_addr, /* I2C address we're talking to */ |
| 55 | u8 *data, /* Data to write */ |
| 56 | u16 length) /* Size of data to write */ |
| 57 | { |
| 58 | /* Return value - default 0 means success */ |
| 59 | int ret; |
| 60 | |
| 61 | |
| 62 | if (!data) length = 0; |
| 63 | if (length > (sizeof(hdw->cmd_buffer) - 3)) { |
| 64 | pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| 65 | "Killing an I2C write to %u that is too large" |
| 66 | " (desired=%u limit=%u)", |
| 67 | i2c_addr, |
| 68 | length,(unsigned int)(sizeof(hdw->cmd_buffer) - 3)); |
| 69 | return -ENOTSUPP; |
| 70 | } |
| 71 | |
| 72 | LOCK_TAKE(hdw->ctl_lock); |
| 73 | |
| 74 | /* Clear the command buffer (likely to be paranoia) */ |
| 75 | memset(hdw->cmd_buffer, 0, sizeof(hdw->cmd_buffer)); |
| 76 | |
| 77 | /* Set up command buffer for an I2C write */ |
Michael Krufky | 8d36436 | 2007-01-22 02:17:55 -0300 | [diff] [blame] | 78 | hdw->cmd_buffer[0] = FX2CMD_I2C_WRITE; /* write prefix */ |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 79 | hdw->cmd_buffer[1] = i2c_addr; /* i2c addr of chip */ |
| 80 | hdw->cmd_buffer[2] = length; /* length of what follows */ |
| 81 | if (length) memcpy(hdw->cmd_buffer + 3, data, length); |
| 82 | |
| 83 | /* Do the operation */ |
| 84 | ret = pvr2_send_request(hdw, |
| 85 | hdw->cmd_buffer, |
| 86 | length + 3, |
| 87 | hdw->cmd_buffer, |
| 88 | 1); |
| 89 | if (!ret) { |
| 90 | if (hdw->cmd_buffer[0] != 8) { |
| 91 | ret = -EIO; |
| 92 | if (hdw->cmd_buffer[0] != 7) { |
| 93 | trace_i2c("unexpected status" |
| 94 | " from i2_write[%d]: %d", |
| 95 | i2c_addr,hdw->cmd_buffer[0]); |
| 96 | } |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | LOCK_GIVE(hdw->ctl_lock); |
| 101 | |
| 102 | return ret; |
| 103 | } |
| 104 | |
| 105 | static int pvr2_i2c_read(struct pvr2_hdw *hdw, /* Context */ |
| 106 | u8 i2c_addr, /* I2C address we're talking to */ |
| 107 | u8 *data, /* Data to write */ |
| 108 | u16 dlen, /* Size of data to write */ |
| 109 | u8 *res, /* Where to put data we read */ |
| 110 | u16 rlen) /* Amount of data to read */ |
| 111 | { |
| 112 | /* Return value - default 0 means success */ |
| 113 | int ret; |
| 114 | |
| 115 | |
| 116 | if (!data) dlen = 0; |
| 117 | if (dlen > (sizeof(hdw->cmd_buffer) - 4)) { |
| 118 | pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| 119 | "Killing an I2C read to %u that has wlen too large" |
| 120 | " (desired=%u limit=%u)", |
| 121 | i2c_addr, |
| 122 | dlen,(unsigned int)(sizeof(hdw->cmd_buffer) - 4)); |
| 123 | return -ENOTSUPP; |
| 124 | } |
| 125 | if (res && (rlen > (sizeof(hdw->cmd_buffer) - 1))) { |
| 126 | pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| 127 | "Killing an I2C read to %u that has rlen too large" |
| 128 | " (desired=%u limit=%u)", |
| 129 | i2c_addr, |
| 130 | rlen,(unsigned int)(sizeof(hdw->cmd_buffer) - 1)); |
| 131 | return -ENOTSUPP; |
| 132 | } |
| 133 | |
| 134 | LOCK_TAKE(hdw->ctl_lock); |
| 135 | |
| 136 | /* Clear the command buffer (likely to be paranoia) */ |
| 137 | memset(hdw->cmd_buffer, 0, sizeof(hdw->cmd_buffer)); |
| 138 | |
| 139 | /* Set up command buffer for an I2C write followed by a read */ |
Michael Krufky | 8d36436 | 2007-01-22 02:17:55 -0300 | [diff] [blame] | 140 | hdw->cmd_buffer[0] = FX2CMD_I2C_READ; /* read prefix */ |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 141 | hdw->cmd_buffer[1] = dlen; /* arg length */ |
| 142 | hdw->cmd_buffer[2] = rlen; /* answer length. Device will send one |
| 143 | more byte (status). */ |
| 144 | hdw->cmd_buffer[3] = i2c_addr; /* i2c addr of chip */ |
| 145 | if (dlen) memcpy(hdw->cmd_buffer + 4, data, dlen); |
| 146 | |
| 147 | /* Do the operation */ |
| 148 | ret = pvr2_send_request(hdw, |
| 149 | hdw->cmd_buffer, |
| 150 | 4 + dlen, |
| 151 | hdw->cmd_buffer, |
| 152 | rlen + 1); |
| 153 | if (!ret) { |
| 154 | if (hdw->cmd_buffer[0] != 8) { |
| 155 | ret = -EIO; |
| 156 | if (hdw->cmd_buffer[0] != 7) { |
| 157 | trace_i2c("unexpected status" |
| 158 | " from i2_read[%d]: %d", |
| 159 | i2c_addr,hdw->cmd_buffer[0]); |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | /* Copy back the result */ |
| 165 | if (res && rlen) { |
| 166 | if (ret) { |
| 167 | /* Error, just blank out the return buffer */ |
| 168 | memset(res, 0, rlen); |
| 169 | } else { |
| 170 | memcpy(res, hdw->cmd_buffer + 1, rlen); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | LOCK_GIVE(hdw->ctl_lock); |
| 175 | |
| 176 | return ret; |
| 177 | } |
| 178 | |
| 179 | /* This is the common low level entry point for doing I2C operations to the |
| 180 | hardware. */ |
Adrian Bunk | 07e337e | 2006-06-30 11:30:20 -0300 | [diff] [blame] | 181 | static int pvr2_i2c_basic_op(struct pvr2_hdw *hdw, |
| 182 | u8 i2c_addr, |
| 183 | u8 *wdata, |
| 184 | u16 wlen, |
| 185 | u8 *rdata, |
| 186 | u16 rlen) |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 187 | { |
| 188 | if (!rdata) rlen = 0; |
| 189 | if (!wdata) wlen = 0; |
| 190 | if (rlen || !wlen) { |
| 191 | return pvr2_i2c_read(hdw,i2c_addr,wdata,wlen,rdata,rlen); |
| 192 | } else { |
| 193 | return pvr2_i2c_write(hdw,i2c_addr,wdata,wlen); |
| 194 | } |
| 195 | } |
| 196 | |
Mike Isely | cc75aed | 2006-10-15 21:35:14 -0300 | [diff] [blame] | 197 | |
| 198 | /* This is a special entry point for cases of I2C transaction attempts to |
| 199 | the IR receiver. The implementation here simulates the IR receiver by |
| 200 | issuing a command to the FX2 firmware and using that response to return |
| 201 | what the real I2C receiver would have returned. We use this for 24xxx |
| 202 | devices, where the IR receiver chip has been removed and replaced with |
| 203 | FX2 related logic. */ |
| 204 | static int i2c_24xxx_ir(struct pvr2_hdw *hdw, |
| 205 | u8 i2c_addr,u8 *wdata,u16 wlen,u8 *rdata,u16 rlen) |
| 206 | { |
| 207 | u8 dat[4]; |
| 208 | unsigned int stat; |
| 209 | |
| 210 | if (!(rlen || wlen)) { |
| 211 | /* This is a probe attempt. Just let it succeed. */ |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | /* We don't understand this kind of transaction */ |
| 216 | if ((wlen != 0) || (rlen == 0)) return -EIO; |
| 217 | |
| 218 | if (rlen < 3) { |
| 219 | /* Mike Isely <isely@pobox.com> Appears to be a probe |
| 220 | attempt from lirc. Just fill in zeroes and return. If |
| 221 | we try instead to do the full transaction here, then bad |
| 222 | things seem to happen within the lirc driver module |
| 223 | (version 0.8.0-7 sources from Debian, when run under |
| 224 | vanilla 2.6.17.6 kernel) - and I don't have the patience |
| 225 | to chase it down. */ |
| 226 | if (rlen > 0) rdata[0] = 0; |
| 227 | if (rlen > 1) rdata[1] = 0; |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | /* Issue a command to the FX2 to read the IR receiver. */ |
| 232 | LOCK_TAKE(hdw->ctl_lock); do { |
Michael Krufky | 8d36436 | 2007-01-22 02:17:55 -0300 | [diff] [blame] | 233 | hdw->cmd_buffer[0] = FX2CMD_GET_IR_CODE; |
Mike Isely | cc75aed | 2006-10-15 21:35:14 -0300 | [diff] [blame] | 234 | stat = pvr2_send_request(hdw, |
| 235 | hdw->cmd_buffer,1, |
| 236 | hdw->cmd_buffer,4); |
| 237 | dat[0] = hdw->cmd_buffer[0]; |
| 238 | dat[1] = hdw->cmd_buffer[1]; |
| 239 | dat[2] = hdw->cmd_buffer[2]; |
| 240 | dat[3] = hdw->cmd_buffer[3]; |
| 241 | } while (0); LOCK_GIVE(hdw->ctl_lock); |
| 242 | |
| 243 | /* Give up if that operation failed. */ |
| 244 | if (stat != 0) return stat; |
| 245 | |
| 246 | /* Mangle the results into something that looks like the real IR |
| 247 | receiver. */ |
| 248 | rdata[2] = 0xc1; |
| 249 | if (dat[0] != 1) { |
| 250 | /* No code received. */ |
| 251 | rdata[0] = 0; |
| 252 | rdata[1] = 0; |
| 253 | } else { |
| 254 | u16 val; |
| 255 | /* Mash the FX2 firmware-provided IR code into something |
| 256 | that the normal i2c chip-level driver expects. */ |
| 257 | val = dat[1]; |
| 258 | val <<= 8; |
| 259 | val |= dat[2]; |
| 260 | val >>= 1; |
| 261 | val &= ~0x0003; |
| 262 | val |= 0x8000; |
| 263 | rdata[0] = (val >> 8) & 0xffu; |
| 264 | rdata[1] = val & 0xffu; |
| 265 | } |
| 266 | |
| 267 | return 0; |
| 268 | } |
| 269 | |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 270 | /* This is a special entry point that is entered if an I2C operation is |
| 271 | attempted to a wm8775 chip on model 24xxx hardware. Autodetect of this |
| 272 | part doesn't work, but we know it is really there. So let's look for |
| 273 | the autodetect attempt and just return success if we see that. */ |
| 274 | static int i2c_hack_wm8775(struct pvr2_hdw *hdw, |
| 275 | u8 i2c_addr,u8 *wdata,u16 wlen,u8 *rdata,u16 rlen) |
| 276 | { |
| 277 | if (!(rlen || wlen)) { |
| 278 | // This is a probe attempt. Just let it succeed. |
| 279 | return 0; |
| 280 | } |
| 281 | return pvr2_i2c_basic_op(hdw,i2c_addr,wdata,wlen,rdata,rlen); |
| 282 | } |
| 283 | |
Mike Isely | 5c808e6 | 2007-04-28 20:11:03 -0300 | [diff] [blame] | 284 | /* This is an entry point designed to always fail any attempt to perform a |
| 285 | transfer. We use this to cause certain I2C addresses to not be |
| 286 | probed. */ |
| 287 | static int i2c_black_hole(struct pvr2_hdw *hdw, |
| 288 | u8 i2c_addr,u8 *wdata,u16 wlen,u8 *rdata,u16 rlen) |
| 289 | { |
| 290 | return -EIO; |
| 291 | } |
| 292 | |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 293 | /* This is a special entry point that is entered if an I2C operation is |
| 294 | attempted to a cx25840 chip on model 24xxx hardware. This chip can |
| 295 | sometimes wedge itself. Worse still, when this happens msp3400 can |
| 296 | falsely detect this part and then the system gets hosed up after msp3400 |
| 297 | gets confused and dies. What we want to do here is try to keep msp3400 |
| 298 | away and also try to notice if the chip is wedged and send a warning to |
| 299 | the system log. */ |
| 300 | static int i2c_hack_cx25840(struct pvr2_hdw *hdw, |
| 301 | u8 i2c_addr,u8 *wdata,u16 wlen,u8 *rdata,u16 rlen) |
| 302 | { |
| 303 | int ret; |
| 304 | unsigned int subaddr; |
| 305 | u8 wbuf[2]; |
| 306 | int state = hdw->i2c_cx25840_hack_state; |
| 307 | |
| 308 | if (!(rlen || wlen)) { |
| 309 | // Probe attempt - always just succeed and don't bother the |
| 310 | // hardware (this helps to make the state machine further |
| 311 | // down somewhat easier). |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | if (state == 3) { |
| 316 | return pvr2_i2c_basic_op(hdw,i2c_addr,wdata,wlen,rdata,rlen); |
| 317 | } |
| 318 | |
| 319 | /* We're looking for the exact pattern where the revision register |
| 320 | is being read. The cx25840 module will always look at the |
| 321 | revision register first. Any other pattern of access therefore |
| 322 | has to be a probe attempt from somebody else so we'll reject it. |
| 323 | Normally we could just let each client just probe the part |
| 324 | anyway, but when the cx25840 is wedged, msp3400 will get a false |
| 325 | positive and that just screws things up... */ |
| 326 | |
| 327 | if (wlen == 0) { |
| 328 | switch (state) { |
| 329 | case 1: subaddr = 0x0100; break; |
| 330 | case 2: subaddr = 0x0101; break; |
| 331 | default: goto fail; |
| 332 | } |
| 333 | } else if (wlen == 2) { |
| 334 | subaddr = (wdata[0] << 8) | wdata[1]; |
| 335 | switch (subaddr) { |
| 336 | case 0x0100: state = 1; break; |
| 337 | case 0x0101: state = 2; break; |
| 338 | default: goto fail; |
| 339 | } |
| 340 | } else { |
| 341 | goto fail; |
| 342 | } |
| 343 | if (!rlen) goto success; |
| 344 | state = 0; |
| 345 | if (rlen != 1) goto fail; |
| 346 | |
| 347 | /* If we get to here then we have a legitimate read for one of the |
| 348 | two revision bytes, so pass it through. */ |
| 349 | wbuf[0] = subaddr >> 8; |
| 350 | wbuf[1] = subaddr; |
| 351 | ret = pvr2_i2c_basic_op(hdw,i2c_addr,wbuf,2,rdata,rlen); |
| 352 | |
| 353 | if ((ret != 0) || (*rdata == 0x04) || (*rdata == 0x0a)) { |
| 354 | pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| 355 | "WARNING: Detected a wedged cx25840 chip;" |
| 356 | " the device will not work."); |
| 357 | pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| 358 | "WARNING: Try power cycling the pvrusb2 device."); |
| 359 | pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| 360 | "WARNING: Disabling further access to the device" |
| 361 | " to prevent other foul-ups."); |
| 362 | // This blocks all further communication with the part. |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 363 | hdw->i2c_func[0x44] = NULL; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 364 | pvr2_hdw_render_useless(hdw); |
| 365 | goto fail; |
| 366 | } |
| 367 | |
| 368 | /* Success! */ |
| 369 | pvr2_trace(PVR2_TRACE_CHIPS,"cx25840 appears to be OK."); |
| 370 | state = 3; |
| 371 | |
| 372 | success: |
| 373 | hdw->i2c_cx25840_hack_state = state; |
| 374 | return 0; |
| 375 | |
| 376 | fail: |
| 377 | hdw->i2c_cx25840_hack_state = state; |
| 378 | return -EIO; |
| 379 | } |
| 380 | |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 381 | /* This is a very, very limited I2C adapter implementation. We can only |
| 382 | support what we actually know will work on the device... */ |
| 383 | static int pvr2_i2c_xfer(struct i2c_adapter *i2c_adap, |
| 384 | struct i2c_msg msgs[], |
| 385 | int num) |
| 386 | { |
| 387 | int ret = -ENOTSUPP; |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 388 | pvr2_i2c_func funcp = NULL; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 389 | struct pvr2_hdw *hdw = (struct pvr2_hdw *)(i2c_adap->algo_data); |
| 390 | |
| 391 | if (!num) { |
| 392 | ret = -EINVAL; |
| 393 | goto done; |
| 394 | } |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 395 | if (msgs[0].addr < PVR2_I2C_FUNC_CNT) { |
| 396 | funcp = hdw->i2c_func[msgs[0].addr]; |
| 397 | } |
| 398 | if (!funcp) { |
| 399 | ret = -EIO; |
| 400 | goto done; |
| 401 | } |
| 402 | |
| 403 | if (num == 1) { |
| 404 | if (msgs[0].flags & I2C_M_RD) { |
| 405 | /* Simple read */ |
| 406 | u16 tcnt,bcnt,offs; |
| 407 | if (!msgs[0].len) { |
| 408 | /* Length == 0 read. This is a probe. */ |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 409 | if (funcp(hdw,msgs[0].addr,NULL,0,NULL,0)) { |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 410 | ret = -EIO; |
| 411 | goto done; |
| 412 | } |
| 413 | ret = 1; |
| 414 | goto done; |
| 415 | } |
| 416 | /* If the read is short enough we'll do the whole |
| 417 | thing atomically. Otherwise we have no choice |
| 418 | but to break apart the reads. */ |
| 419 | tcnt = msgs[0].len; |
| 420 | offs = 0; |
| 421 | while (tcnt) { |
| 422 | bcnt = tcnt; |
| 423 | if (bcnt > sizeof(hdw->cmd_buffer)-1) { |
| 424 | bcnt = sizeof(hdw->cmd_buffer)-1; |
| 425 | } |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 426 | if (funcp(hdw,msgs[0].addr,NULL,0, |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 427 | msgs[0].buf+offs,bcnt)) { |
| 428 | ret = -EIO; |
| 429 | goto done; |
| 430 | } |
| 431 | offs += bcnt; |
| 432 | tcnt -= bcnt; |
| 433 | } |
| 434 | ret = 1; |
| 435 | goto done; |
| 436 | } else { |
| 437 | /* Simple write */ |
| 438 | ret = 1; |
| 439 | if (funcp(hdw,msgs[0].addr, |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 440 | msgs[0].buf,msgs[0].len,NULL,0)) { |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 441 | ret = -EIO; |
| 442 | } |
| 443 | goto done; |
| 444 | } |
| 445 | } else if (num == 2) { |
| 446 | if (msgs[0].addr != msgs[1].addr) { |
| 447 | trace_i2c("i2c refusing 2 phase transfer with" |
| 448 | " conflicting target addresses"); |
| 449 | ret = -ENOTSUPP; |
| 450 | goto done; |
| 451 | } |
| 452 | if ((!((msgs[0].flags & I2C_M_RD))) && |
| 453 | (msgs[1].flags & I2C_M_RD)) { |
| 454 | u16 tcnt,bcnt,wcnt,offs; |
| 455 | /* Write followed by atomic read. If the read |
| 456 | portion is short enough we'll do the whole thing |
| 457 | atomically. Otherwise we have no choice but to |
| 458 | break apart the reads. */ |
| 459 | tcnt = msgs[1].len; |
| 460 | wcnt = msgs[0].len; |
| 461 | offs = 0; |
| 462 | while (tcnt || wcnt) { |
| 463 | bcnt = tcnt; |
| 464 | if (bcnt > sizeof(hdw->cmd_buffer)-1) { |
| 465 | bcnt = sizeof(hdw->cmd_buffer)-1; |
| 466 | } |
| 467 | if (funcp(hdw,msgs[0].addr, |
| 468 | msgs[0].buf,wcnt, |
| 469 | msgs[1].buf+offs,bcnt)) { |
| 470 | ret = -EIO; |
| 471 | goto done; |
| 472 | } |
| 473 | offs += bcnt; |
| 474 | tcnt -= bcnt; |
| 475 | wcnt = 0; |
| 476 | } |
| 477 | ret = 2; |
| 478 | goto done; |
| 479 | } else { |
| 480 | trace_i2c("i2c refusing complex transfer" |
| 481 | " read0=%d read1=%d", |
| 482 | (msgs[0].flags & I2C_M_RD), |
| 483 | (msgs[1].flags & I2C_M_RD)); |
| 484 | } |
| 485 | } else { |
| 486 | trace_i2c("i2c refusing %d phase transfer",num); |
| 487 | } |
| 488 | |
| 489 | done: |
| 490 | if (pvrusb2_debug & PVR2_TRACE_I2C_TRAF) { |
| 491 | unsigned int idx,offs,cnt; |
| 492 | for (idx = 0; idx < num; idx++) { |
| 493 | cnt = msgs[idx].len; |
| 494 | printk(KERN_INFO |
| 495 | "pvrusb2 i2c xfer %u/%u:" |
Jean Delvare | 7fb0dfc | 2007-09-08 23:19:32 -0300 | [diff] [blame] | 496 | " addr=0x%x len=%d %s", |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 497 | idx+1,num, |
| 498 | msgs[idx].addr, |
| 499 | cnt, |
| 500 | (msgs[idx].flags & I2C_M_RD ? |
Jean Delvare | 7fb0dfc | 2007-09-08 23:19:32 -0300 | [diff] [blame] | 501 | "read" : "write")); |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 502 | if ((ret > 0) || !(msgs[idx].flags & I2C_M_RD)) { |
| 503 | if (cnt > 8) cnt = 8; |
| 504 | printk(" ["); |
| 505 | for (offs = 0; offs < (cnt>8?8:cnt); offs++) { |
| 506 | if (offs) printk(" "); |
| 507 | printk("%02x",msgs[idx].buf[offs]); |
| 508 | } |
| 509 | if (offs < cnt) printk(" ..."); |
| 510 | printk("]"); |
| 511 | } |
| 512 | if (idx+1 == num) { |
| 513 | printk(" result=%d",ret); |
| 514 | } |
| 515 | printk("\n"); |
| 516 | } |
| 517 | if (!num) { |
| 518 | printk(KERN_INFO |
| 519 | "pvrusb2 i2c xfer null transfer result=%d\n", |
| 520 | ret); |
| 521 | } |
| 522 | } |
| 523 | return ret; |
| 524 | } |
| 525 | |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 526 | static u32 pvr2_i2c_functionality(struct i2c_adapter *adap) |
| 527 | { |
Jean Delvare | 7fb0dfc | 2007-09-08 23:19:32 -0300 | [diff] [blame] | 528 | return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 529 | } |
| 530 | |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 531 | static struct i2c_algorithm pvr2_i2c_algo_template = { |
| 532 | .master_xfer = pvr2_i2c_xfer, |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 533 | .functionality = pvr2_i2c_functionality, |
| 534 | }; |
| 535 | |
| 536 | static struct i2c_adapter pvr2_i2c_adap_template = { |
| 537 | .owner = THIS_MODULE, |
Mike Isely | 15b4744 | 2009-03-06 23:51:35 -0300 | [diff] [blame] | 538 | .class = 0, |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 539 | }; |
| 540 | |
Mike Isely | 0cc1186 | 2008-08-31 21:06:11 -0300 | [diff] [blame] | 541 | |
| 542 | /* Return true if device exists at given address */ |
| 543 | static int do_i2c_probe(struct pvr2_hdw *hdw, int addr) |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 544 | { |
| 545 | struct i2c_msg msg[1]; |
Mike Isely | 0cc1186 | 2008-08-31 21:06:11 -0300 | [diff] [blame] | 546 | int rc; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 547 | msg[0].addr = 0; |
| 548 | msg[0].flags = I2C_M_RD; |
| 549 | msg[0].len = 0; |
Mike Isely | a0fd1cb | 2006-06-30 11:35:28 -0300 | [diff] [blame] | 550 | msg[0].buf = NULL; |
Mike Isely | 0cc1186 | 2008-08-31 21:06:11 -0300 | [diff] [blame] | 551 | msg[0].addr = addr; |
| 552 | rc = i2c_transfer(&hdw->i2c_adap, msg, ARRAY_SIZE(msg)); |
| 553 | return rc == 1; |
| 554 | } |
| 555 | |
| 556 | static void do_i2c_scan(struct pvr2_hdw *hdw) |
| 557 | { |
| 558 | int i; |
| 559 | printk(KERN_INFO "%s: i2c scan beginning\n", hdw->name); |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 560 | for (i = 0; i < 128; i++) { |
Mike Isely | 0cc1186 | 2008-08-31 21:06:11 -0300 | [diff] [blame] | 561 | if (do_i2c_probe(hdw, i)) { |
| 562 | printk(KERN_INFO "%s: i2c scan: found device @ 0x%x\n", |
| 563 | hdw->name, i); |
| 564 | } |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 565 | } |
Mike Isely | 0cc1186 | 2008-08-31 21:06:11 -0300 | [diff] [blame] | 566 | printk(KERN_INFO "%s: i2c scan done.\n", hdw->name); |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 567 | } |
| 568 | |
Mike Isely | cd85b7a | 2009-05-01 22:23:39 -0300 | [diff] [blame] | 569 | static void pvr2_i2c_register_ir(struct pvr2_hdw *hdw) |
| 570 | { |
| 571 | struct i2c_board_info info; |
Andy Walls | 4999e27 | 2011-01-16 21:21:03 -0300 | [diff] [blame] | 572 | struct IR_i2c_init_data *init_data = &hdw->ir_init_data; |
Mike Isely | cd85b7a | 2009-05-01 22:23:39 -0300 | [diff] [blame] | 573 | if (pvr2_disable_ir_video) { |
| 574 | pvr2_trace(PVR2_TRACE_INFO, |
| 575 | "Automatic binding of ir_video has been disabled."); |
| 576 | return; |
| 577 | } |
Andy Walls | 4999e27 | 2011-01-16 21:21:03 -0300 | [diff] [blame] | 578 | memset(&info, 0, sizeof(struct i2c_board_info)); |
| 579 | switch (hdw->ir_scheme_active) { |
| 580 | case PVR2_IR_SCHEME_24XXX: /* FX2-controlled IR */ |
| 581 | case PVR2_IR_SCHEME_29XXX: /* Original 29xxx device */ |
Mauro Carvalho Chehab | af86ce7 | 2011-01-24 12:18:48 -0300 | [diff] [blame] | 582 | init_data->ir_codes = RC_MAP_HAUPPAUGE; |
Andy Walls | 4999e27 | 2011-01-16 21:21:03 -0300 | [diff] [blame] | 583 | init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP; |
David Härdeman | c003ab1 | 2012-10-11 19:11:54 -0300 | [diff] [blame] | 584 | init_data->type = RC_BIT_RC5; |
Andy Walls | 4999e27 | 2011-01-16 21:21:03 -0300 | [diff] [blame] | 585 | init_data->name = hdw->hdw_desc->description; |
| 586 | init_data->polling_interval = 100; /* ms From ir-kbd-i2c */ |
| 587 | /* IR Receiver */ |
| 588 | info.addr = 0x18; |
| 589 | info.platform_data = init_data; |
| 590 | strlcpy(info.type, "ir_video", I2C_NAME_SIZE); |
| 591 | pvr2_trace(PVR2_TRACE_INFO, "Binding %s to i2c address 0x%02x.", |
| 592 | info.type, info.addr); |
| 593 | i2c_new_device(&hdw->i2c_adap, &info); |
| 594 | break; |
| 595 | case PVR2_IR_SCHEME_ZILOG: /* HVR-1950 style */ |
| 596 | case PVR2_IR_SCHEME_24XXX_MCE: /* 24xxx MCE device */ |
Mauro Carvalho Chehab | af86ce7 | 2011-01-24 12:18:48 -0300 | [diff] [blame] | 597 | init_data->ir_codes = RC_MAP_HAUPPAUGE; |
Andy Walls | 4999e27 | 2011-01-16 21:21:03 -0300 | [diff] [blame] | 598 | init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; |
David Härdeman | c003ab1 | 2012-10-11 19:11:54 -0300 | [diff] [blame] | 599 | init_data->type = RC_BIT_RC5; |
Andy Walls | 4999e27 | 2011-01-16 21:21:03 -0300 | [diff] [blame] | 600 | init_data->name = hdw->hdw_desc->description; |
Andy Walls | 4999e27 | 2011-01-16 21:21:03 -0300 | [diff] [blame] | 601 | /* IR Receiver */ |
| 602 | info.addr = 0x71; |
| 603 | info.platform_data = init_data; |
| 604 | strlcpy(info.type, "ir_rx_z8f0811_haup", I2C_NAME_SIZE); |
| 605 | pvr2_trace(PVR2_TRACE_INFO, "Binding %s to i2c address 0x%02x.", |
| 606 | info.type, info.addr); |
| 607 | i2c_new_device(&hdw->i2c_adap, &info); |
| 608 | /* IR Trasmitter */ |
| 609 | info.addr = 0x70; |
| 610 | info.platform_data = init_data; |
| 611 | strlcpy(info.type, "ir_tx_z8f0811_haup", I2C_NAME_SIZE); |
| 612 | pvr2_trace(PVR2_TRACE_INFO, "Binding %s to i2c address 0x%02x.", |
| 613 | info.type, info.addr); |
| 614 | i2c_new_device(&hdw->i2c_adap, &info); |
| 615 | break; |
| 616 | default: |
Mike Isely | cd85b7a | 2009-05-01 22:23:39 -0300 | [diff] [blame] | 617 | /* The device either doesn't support I2C-based IR or we |
| 618 | don't know (yet) how to operate IR on the device. */ |
Andy Walls | 4999e27 | 2011-01-16 21:21:03 -0300 | [diff] [blame] | 619 | break; |
Mike Isely | cd85b7a | 2009-05-01 22:23:39 -0300 | [diff] [blame] | 620 | } |
Mike Isely | cd85b7a | 2009-05-01 22:23:39 -0300 | [diff] [blame] | 621 | } |
| 622 | |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 623 | void pvr2_i2c_core_init(struct pvr2_hdw *hdw) |
| 624 | { |
| 625 | unsigned int idx; |
| 626 | |
Mike Isely | cc75aed | 2006-10-15 21:35:14 -0300 | [diff] [blame] | 627 | /* The default action for all possible I2C addresses is just to do |
| 628 | the transfer normally. */ |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 629 | for (idx = 0; idx < PVR2_I2C_FUNC_CNT; idx++) { |
| 630 | hdw->i2c_func[idx] = pvr2_i2c_basic_op; |
| 631 | } |
| 632 | |
Mike Isely | cc75aed | 2006-10-15 21:35:14 -0300 | [diff] [blame] | 633 | /* However, deal with various special cases for 24xxx hardware. */ |
Mike Isely | 5c808e6 | 2007-04-28 20:11:03 -0300 | [diff] [blame] | 634 | if (ir_mode[hdw->unit_number] == 0) { |
| 635 | printk(KERN_INFO "%s: IR disabled\n",hdw->name); |
| 636 | hdw->i2c_func[0x18] = i2c_black_hole; |
| 637 | } else if (ir_mode[hdw->unit_number] == 1) { |
Mike Isely | 27eab38 | 2009-04-06 01:51:38 -0300 | [diff] [blame] | 638 | if (hdw->ir_scheme_active == PVR2_IR_SCHEME_24XXX) { |
| 639 | /* Set up translation so that our IR looks like a |
| 640 | 29xxx device */ |
Mike Isely | 5c808e6 | 2007-04-28 20:11:03 -0300 | [diff] [blame] | 641 | hdw->i2c_func[0x18] = i2c_24xxx_ir; |
| 642 | } |
| 643 | } |
Mike Isely | 989eb15 | 2007-11-26 01:53:12 -0300 | [diff] [blame] | 644 | if (hdw->hdw_desc->flag_has_cx25840) { |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 645 | hdw->i2c_func[0x44] = i2c_hack_cx25840; |
| 646 | } |
Mike Isely | 989eb15 | 2007-11-26 01:53:12 -0300 | [diff] [blame] | 647 | if (hdw->hdw_desc->flag_has_wm8775) { |
| 648 | hdw->i2c_func[0x1b] = i2c_hack_wm8775; |
| 649 | } |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 650 | |
| 651 | // Configure the adapter and set up everything else related to it. |
Ezequiel Garcia | 5338c16 | 2012-10-23 15:57:09 -0300 | [diff] [blame] | 652 | hdw->i2c_adap = pvr2_i2c_adap_template; |
| 653 | hdw->i2c_algo = pvr2_i2c_algo_template; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 654 | strlcpy(hdw->i2c_adap.name,hdw->name,sizeof(hdw->i2c_adap.name)); |
Jean Delvare | 12a917f | 2007-02-13 22:09:03 +0100 | [diff] [blame] | 655 | hdw->i2c_adap.dev.parent = &hdw->usb_dev->dev; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 656 | hdw->i2c_adap.algo = &hdw->i2c_algo; |
| 657 | hdw->i2c_adap.algo_data = hdw; |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 658 | hdw->i2c_linked = !0; |
Mike Isely | e9c64a7 | 2009-03-06 23:42:20 -0300 | [diff] [blame] | 659 | i2c_set_adapdata(&hdw->i2c_adap, &hdw->v4l2_dev); |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 660 | i2c_add_adapter(&hdw->i2c_adap); |
Mike Isely | 0cc1186 | 2008-08-31 21:06:11 -0300 | [diff] [blame] | 661 | if (hdw->i2c_func[0x18] == i2c_24xxx_ir) { |
| 662 | /* Probe for a different type of IR receiver on this |
Mike Isely | 27eab38 | 2009-04-06 01:51:38 -0300 | [diff] [blame] | 663 | device. This is really the only way to differentiate |
| 664 | older 24xxx devices from 24xxx variants that include an |
| 665 | IR blaster. If the IR blaster is present, the IR |
| 666 | receiver is part of that chip and thus we must disable |
| 667 | the emulated IR receiver. */ |
Mike Isely | 0cc1186 | 2008-08-31 21:06:11 -0300 | [diff] [blame] | 668 | if (do_i2c_probe(hdw, 0x71)) { |
| 669 | pvr2_trace(PVR2_TRACE_INFO, |
| 670 | "Device has newer IR hardware;" |
| 671 | " disabling unneeded virtual IR device"); |
| 672 | hdw->i2c_func[0x18] = NULL; |
Mike Isely | 27eab38 | 2009-04-06 01:51:38 -0300 | [diff] [blame] | 673 | /* Remember that this is a different device... */ |
| 674 | hdw->ir_scheme_active = PVR2_IR_SCHEME_24XXX_MCE; |
Mike Isely | 0cc1186 | 2008-08-31 21:06:11 -0300 | [diff] [blame] | 675 | } |
| 676 | } |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 677 | if (i2c_scan) do_i2c_scan(hdw); |
Mike Isely | cd85b7a | 2009-05-01 22:23:39 -0300 | [diff] [blame] | 678 | |
| 679 | pvr2_i2c_register_ir(hdw); |
Mike Isely | d855497 | 2006-06-26 20:58:46 -0300 | [diff] [blame] | 680 | } |
| 681 | |
| 682 | void pvr2_i2c_core_done(struct pvr2_hdw *hdw) |
| 683 | { |
| 684 | if (hdw->i2c_linked) { |
| 685 | i2c_del_adapter(&hdw->i2c_adap); |
| 686 | hdw->i2c_linked = 0; |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | /* |
| 691 | Stuff for Emacs to see, in order to encourage consistent editing style: |
| 692 | *** Local Variables: *** |
| 693 | *** mode: c *** |
| 694 | *** fill-column: 75 *** |
| 695 | *** tab-width: 8 *** |
| 696 | *** c-basic-offset: 8 *** |
| 697 | *** End: *** |
| 698 | */ |