Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 1 | /* |
| 2 | * wm9712.c -- Codec driver for Wolfson WM9712 AC97 Codecs. |
| 3 | * |
| 4 | * Copyright 2003, 2004, 2005, 2006, 2007 Wolfson Microelectronics PLC. |
Liam Girdwood | b8d055a | 2008-10-13 23:00:15 -0400 | [diff] [blame] | 5 | * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 6 | * Parts Copyright : Ian Molton <spyro@f2s.com> |
| 7 | * Andrew Zabolotny <zap@homelink.ru> |
| 8 | * Russell King <rmk@arm.linux.org.uk> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your |
| 13 | * option) any later version. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/moduleparam.h> |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 19 | #include <linux/kernel.h> |
| 20 | #include <linux/input.h> |
| 21 | #include <linux/delay.h> |
| 22 | #include <linux/bitops.h> |
| 23 | #include <linux/wm97xx.h> |
| 24 | |
| 25 | #define TS_NAME "wm97xx" |
| 26 | #define WM9712_VERSION "1.00" |
| 27 | #define DEFAULT_PRESSURE 0xb0c0 |
| 28 | |
| 29 | /* |
| 30 | * Module parameters |
| 31 | */ |
| 32 | |
| 33 | /* |
| 34 | * Set internal pull up for pen detect. |
| 35 | * |
| 36 | * Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive) |
| 37 | * i.e. pull up resistance = 64k Ohms / rpu. |
| 38 | * |
| 39 | * Adjust this value if you are having problems with pen detect not |
| 40 | * detecting any down event. |
| 41 | */ |
| 42 | static int rpu = 8; |
| 43 | module_param(rpu, int, 0); |
| 44 | MODULE_PARM_DESC(rpu, "Set internal pull up resitor for pen detect."); |
| 45 | |
| 46 | /* |
| 47 | * Set current used for pressure measurement. |
| 48 | * |
| 49 | * Set pil = 2 to use 400uA |
| 50 | * pil = 1 to use 200uA and |
| 51 | * pil = 0 to disable pressure measurement. |
| 52 | * |
| 53 | * This is used to increase the range of values returned by the adc |
| 54 | * when measureing touchpanel pressure. |
| 55 | */ |
| 56 | static int pil; |
| 57 | module_param(pil, int, 0); |
| 58 | MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); |
| 59 | |
| 60 | /* |
| 61 | * Set threshold for pressure measurement. |
| 62 | * |
| 63 | * Pen down pressure below threshold is ignored. |
| 64 | */ |
| 65 | static int pressure = DEFAULT_PRESSURE & 0xfff; |
| 66 | module_param(pressure, int, 0); |
| 67 | MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); |
| 68 | |
| 69 | /* |
| 70 | * Set adc sample delay. |
| 71 | * |
| 72 | * For accurate touchpanel measurements, some settling time may be |
| 73 | * required between the switch matrix applying a voltage across the |
| 74 | * touchpanel plate and the ADC sampling the signal. |
| 75 | * |
| 76 | * This delay can be set by setting delay = n, where n is the array |
| 77 | * position of the delay in the array delay_table below. |
| 78 | * Long delays > 1ms are supported for completeness, but are not |
| 79 | * recommended. |
| 80 | */ |
| 81 | static int delay = 3; |
| 82 | module_param(delay, int, 0); |
| 83 | MODULE_PARM_DESC(delay, "Set adc sample delay."); |
| 84 | |
| 85 | /* |
| 86 | * Set five_wire = 1 to use a 5 wire touchscreen. |
| 87 | * |
| 88 | * NOTE: Five wire mode does not allow for readback of pressure. |
| 89 | */ |
| 90 | static int five_wire; |
| 91 | module_param(five_wire, int, 0); |
| 92 | MODULE_PARM_DESC(five_wire, "Set to '1' to use 5-wire touchscreen."); |
| 93 | |
| 94 | /* |
| 95 | * Set adc mask function. |
| 96 | * |
| 97 | * Sources of glitch noise, such as signals driving an LCD display, may feed |
| 98 | * through to the touch screen plates and affect measurement accuracy. In |
| 99 | * order to minimise this, a signal may be applied to the MASK pin to delay or |
| 100 | * synchronise the sampling. |
| 101 | * |
| 102 | * 0 = No delay or sync |
| 103 | * 1 = High on pin stops conversions |
| 104 | * 2 = Edge triggered, edge on pin delays conversion by delay param (above) |
| 105 | * 3 = Edge triggered, edge on pin starts conversion after delay param |
| 106 | */ |
| 107 | static int mask; |
| 108 | module_param(mask, int, 0); |
| 109 | MODULE_PARM_DESC(mask, "Set adc mask function."); |
| 110 | |
| 111 | /* |
| 112 | * Coordinate Polling Enable. |
| 113 | * |
| 114 | * Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together |
| 115 | * for every poll. |
| 116 | */ |
| 117 | static int coord; |
| 118 | module_param(coord, int, 0); |
| 119 | MODULE_PARM_DESC(coord, "Polling coordinate mode"); |
| 120 | |
| 121 | /* |
| 122 | * ADC sample delay times in uS |
| 123 | */ |
| 124 | static const int delay_table[] = { |
| 125 | 21, /* 1 AC97 Link frames */ |
| 126 | 42, /* 2 */ |
| 127 | 84, /* 4 */ |
| 128 | 167, /* 8 */ |
| 129 | 333, /* 16 */ |
| 130 | 667, /* 32 */ |
| 131 | 1000, /* 48 */ |
| 132 | 1333, /* 64 */ |
| 133 | 2000, /* 96 */ |
| 134 | 2667, /* 128 */ |
| 135 | 3333, /* 160 */ |
| 136 | 4000, /* 192 */ |
| 137 | 4667, /* 224 */ |
| 138 | 5333, /* 256 */ |
| 139 | 6000, /* 288 */ |
| 140 | 0 /* No delay, switch matrix always on */ |
| 141 | }; |
| 142 | |
| 143 | /* |
| 144 | * Delay after issuing a POLL command. |
| 145 | * |
| 146 | * The delay is 3 AC97 link frames + the touchpanel settling delay |
| 147 | */ |
| 148 | static inline void poll_delay(int d) |
| 149 | { |
| 150 | udelay(3 * AC97_LINK_FRAME + delay_table[d]); |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * set up the physical settings of the WM9712 |
| 155 | */ |
| 156 | static void wm9712_phy_init(struct wm97xx *wm) |
| 157 | { |
| 158 | u16 dig1 = 0; |
| 159 | u16 dig2 = WM97XX_RPR | WM9712_RPU(1); |
| 160 | |
| 161 | /* WM9712 rpu */ |
| 162 | if (rpu) { |
| 163 | dig2 &= 0xffc0; |
| 164 | dig2 |= WM9712_RPU(rpu); |
Markus Pargmann | d73a17e | 2013-03-09 15:22:35 -0800 | [diff] [blame] | 165 | dev_dbg(wm->dev, "setting pen detect pull-up to %d Ohms\n", |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 166 | 64000 / rpu); |
| 167 | } |
| 168 | |
Mark Brown | 8a65c02 | 2008-06-26 09:56:27 -0400 | [diff] [blame] | 169 | /* WM9712 five wire */ |
| 170 | if (five_wire) { |
| 171 | dig2 |= WM9712_45W; |
Markus Pargmann | d73a17e | 2013-03-09 15:22:35 -0800 | [diff] [blame] | 172 | dev_dbg(wm->dev, "setting 5-wire touchscreen mode.\n"); |
Mark Brown | 8a65c02 | 2008-06-26 09:56:27 -0400 | [diff] [blame] | 173 | |
| 174 | if (pil) { |
| 175 | dev_warn(wm->dev, "pressure measurement is not " |
| 176 | "supported in 5-wire mode\n"); |
| 177 | pil = 0; |
| 178 | } |
| 179 | } |
| 180 | |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 181 | /* touchpanel pressure current*/ |
| 182 | if (pil == 2) { |
| 183 | dig2 |= WM9712_PIL; |
| 184 | dev_dbg(wm->dev, |
Markus Pargmann | d73a17e | 2013-03-09 15:22:35 -0800 | [diff] [blame] | 185 | "setting pressure measurement current to 400uA.\n"); |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 186 | } else if (pil) |
| 187 | dev_dbg(wm->dev, |
Markus Pargmann | d73a17e | 2013-03-09 15:22:35 -0800 | [diff] [blame] | 188 | "setting pressure measurement current to 200uA.\n"); |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 189 | if (!pil) |
| 190 | pressure = 0; |
| 191 | |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 192 | /* polling mode sample settling delay */ |
| 193 | if (delay < 0 || delay > 15) { |
Markus Pargmann | d73a17e | 2013-03-09 15:22:35 -0800 | [diff] [blame] | 194 | dev_dbg(wm->dev, "supplied delay out of range.\n"); |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 195 | delay = 4; |
| 196 | } |
| 197 | dig1 &= 0xff0f; |
| 198 | dig1 |= WM97XX_DELAY(delay); |
Markus Pargmann | d73a17e | 2013-03-09 15:22:35 -0800 | [diff] [blame] | 199 | dev_dbg(wm->dev, "setting adc sample delay to %d u Secs.\n", |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 200 | delay_table[delay]); |
| 201 | |
| 202 | /* mask */ |
| 203 | dig2 |= ((mask & 0x3) << 6); |
| 204 | if (mask) { |
| 205 | u16 reg; |
| 206 | /* Set GPIO4 as Mask Pin*/ |
| 207 | reg = wm97xx_reg_read(wm, AC97_MISC_AFE); |
| 208 | wm97xx_reg_write(wm, AC97_MISC_AFE, reg | WM97XX_GPIO_4); |
| 209 | reg = wm97xx_reg_read(wm, AC97_GPIO_CFG); |
| 210 | wm97xx_reg_write(wm, AC97_GPIO_CFG, reg | WM97XX_GPIO_4); |
| 211 | } |
| 212 | |
| 213 | /* wait - coord mode */ |
| 214 | if (coord) |
| 215 | dig2 |= WM9712_WAIT; |
| 216 | |
| 217 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); |
| 218 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); |
| 219 | } |
| 220 | |
| 221 | static void wm9712_dig_enable(struct wm97xx *wm, int enable) |
| 222 | { |
| 223 | u16 dig2 = wm->dig[2]; |
| 224 | |
| 225 | if (enable) { |
| 226 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, |
| 227 | dig2 | WM97XX_PRP_DET_DIG); |
| 228 | wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ |
| 229 | } else |
| 230 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, |
| 231 | dig2 & ~WM97XX_PRP_DET_DIG); |
| 232 | } |
| 233 | |
| 234 | static void wm9712_aux_prepare(struct wm97xx *wm) |
| 235 | { |
| 236 | memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); |
| 237 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, 0); |
| 238 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, WM97XX_PRP_DET_DIG); |
| 239 | } |
| 240 | |
| 241 | static void wm9712_dig_restore(struct wm97xx *wm) |
| 242 | { |
| 243 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]); |
| 244 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]); |
| 245 | } |
| 246 | |
| 247 | static inline int is_pden(struct wm97xx *wm) |
| 248 | { |
| 249 | return wm->dig[2] & WM9712_PDEN; |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * Read a sample from the WM9712 adc in polling mode. |
| 254 | */ |
| 255 | static int wm9712_poll_sample(struct wm97xx *wm, int adcsel, int *sample) |
| 256 | { |
| 257 | int timeout = 5 * delay; |
Wolfram Sang | 77da383 | 2011-07-04 19:22:01 -0700 | [diff] [blame] | 258 | bool wants_pen = adcsel & WM97XX_PEN_DOWN; |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 259 | |
Wolfram Sang | 77da383 | 2011-07-04 19:22:01 -0700 | [diff] [blame] | 260 | if (wants_pen && !wm->pen_probably_down) { |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 261 | u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); |
| 262 | if (!(data & WM97XX_PEN_DOWN)) |
| 263 | return RC_PENUP; |
| 264 | wm->pen_probably_down = 1; |
| 265 | } |
| 266 | |
| 267 | /* set up digitiser */ |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 268 | if (wm->mach_ops && wm->mach_ops->pre_sample) |
| 269 | wm->mach_ops->pre_sample(adcsel); |
Wolfram Sang | c8f2052 | 2011-07-04 19:22:00 -0700 | [diff] [blame] | 270 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, (adcsel & WM97XX_ADCSEL_MASK) |
| 271 | | WM97XX_POLL | WM97XX_DELAY(delay)); |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 272 | |
| 273 | /* wait 3 AC97 time slots + delay for conversion */ |
| 274 | poll_delay(delay); |
| 275 | |
| 276 | /* wait for POLL to go low */ |
| 277 | while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) |
| 278 | && timeout) { |
| 279 | udelay(AC97_LINK_FRAME); |
| 280 | timeout--; |
| 281 | } |
| 282 | |
| 283 | if (timeout <= 0) { |
| 284 | /* If PDEN is set, we can get a timeout when pen goes up */ |
| 285 | if (is_pden(wm)) |
| 286 | wm->pen_probably_down = 0; |
| 287 | else |
Markus Pargmann | d73a17e | 2013-03-09 15:22:35 -0800 | [diff] [blame] | 288 | dev_dbg(wm->dev, "adc sample timeout\n"); |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 289 | return RC_PENUP; |
| 290 | } |
| 291 | |
| 292 | *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); |
| 293 | if (wm->mach_ops && wm->mach_ops->post_sample) |
| 294 | wm->mach_ops->post_sample(adcsel); |
| 295 | |
| 296 | /* check we have correct sample */ |
Wolfram Sang | c8f2052 | 2011-07-04 19:22:00 -0700 | [diff] [blame] | 297 | if ((*sample ^ adcsel) & WM97XX_ADCSEL_MASK) { |
Markus Pargmann | d73a17e | 2013-03-09 15:22:35 -0800 | [diff] [blame] | 298 | dev_dbg(wm->dev, "adc wrong sample, wanted %x got %x\n", |
Wolfram Sang | c8f2052 | 2011-07-04 19:22:00 -0700 | [diff] [blame] | 299 | adcsel & WM97XX_ADCSEL_MASK, |
| 300 | *sample & WM97XX_ADCSEL_MASK); |
Markus Pargmann | fa45255 | 2013-03-09 15:20:50 -0800 | [diff] [blame] | 301 | return RC_AGAIN; |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 302 | } |
| 303 | |
Wolfram Sang | 77da383 | 2011-07-04 19:22:01 -0700 | [diff] [blame] | 304 | if (wants_pen && !(*sample & WM97XX_PEN_DOWN)) { |
Markus Pargmann | 5407927 | 2013-03-09 15:21:33 -0800 | [diff] [blame] | 305 | /* Sometimes it reads a wrong value the first time. */ |
| 306 | *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); |
| 307 | if (!(*sample & WM97XX_PEN_DOWN)) { |
| 308 | wm->pen_probably_down = 0; |
| 309 | return RC_PENUP; |
| 310 | } |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | return RC_VALID; |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * Read a coord from the WM9712 adc in polling mode. |
| 318 | */ |
| 319 | static int wm9712_poll_coord(struct wm97xx *wm, struct wm97xx_data *data) |
| 320 | { |
| 321 | int timeout = 5 * delay; |
| 322 | |
| 323 | if (!wm->pen_probably_down) { |
| 324 | u16 data_rd = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); |
| 325 | if (!(data_rd & WM97XX_PEN_DOWN)) |
| 326 | return RC_PENUP; |
| 327 | wm->pen_probably_down = 1; |
| 328 | } |
| 329 | |
| 330 | /* set up digitiser */ |
| 331 | if (wm->mach_ops && wm->mach_ops->pre_sample) |
| 332 | wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); |
| 333 | |
| 334 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, |
| 335 | WM97XX_COO | WM97XX_POLL | WM97XX_DELAY(delay)); |
| 336 | |
| 337 | /* wait 3 AC97 time slots + delay for conversion and read x */ |
| 338 | poll_delay(delay); |
| 339 | data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); |
| 340 | /* wait for POLL to go low */ |
| 341 | while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) |
| 342 | && timeout) { |
| 343 | udelay(AC97_LINK_FRAME); |
| 344 | timeout--; |
| 345 | } |
| 346 | |
| 347 | if (timeout <= 0) { |
| 348 | /* If PDEN is set, we can get a timeout when pen goes up */ |
| 349 | if (is_pden(wm)) |
| 350 | wm->pen_probably_down = 0; |
| 351 | else |
Markus Pargmann | d73a17e | 2013-03-09 15:22:35 -0800 | [diff] [blame] | 352 | dev_dbg(wm->dev, "adc sample timeout\n"); |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 353 | return RC_PENUP; |
| 354 | } |
| 355 | |
| 356 | /* read back y data */ |
| 357 | data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); |
| 358 | if (pil) |
| 359 | data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); |
| 360 | else |
| 361 | data->p = DEFAULT_PRESSURE; |
| 362 | |
| 363 | if (wm->mach_ops && wm->mach_ops->post_sample) |
| 364 | wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); |
| 365 | |
| 366 | /* check we have correct sample */ |
| 367 | if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y)) |
| 368 | goto err; |
| 369 | if (pil && !(data->p & WM97XX_ADCSEL_PRES)) |
| 370 | goto err; |
| 371 | |
| 372 | if (!(data->x & WM97XX_PEN_DOWN) || !(data->y & WM97XX_PEN_DOWN)) { |
| 373 | wm->pen_probably_down = 0; |
| 374 | return RC_PENUP; |
| 375 | } |
| 376 | return RC_VALID; |
| 377 | err: |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | /* |
| 382 | * Sample the WM9712 touchscreen in polling mode |
| 383 | */ |
| 384 | static int wm9712_poll_touch(struct wm97xx *wm, struct wm97xx_data *data) |
| 385 | { |
| 386 | int rc; |
| 387 | |
| 388 | if (coord) { |
| 389 | rc = wm9712_poll_coord(wm, data); |
| 390 | if (rc != RC_VALID) |
| 391 | return rc; |
| 392 | } else { |
Wolfram Sang | 77da383 | 2011-07-04 19:22:01 -0700 | [diff] [blame] | 393 | rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_X | WM97XX_PEN_DOWN, |
| 394 | &data->x); |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 395 | if (rc != RC_VALID) |
| 396 | return rc; |
| 397 | |
Wolfram Sang | 77da383 | 2011-07-04 19:22:01 -0700 | [diff] [blame] | 398 | rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_Y | WM97XX_PEN_DOWN, |
| 399 | &data->y); |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 400 | if (rc != RC_VALID) |
| 401 | return rc; |
| 402 | |
| 403 | if (pil && !five_wire) { |
Wolfram Sang | 77da383 | 2011-07-04 19:22:01 -0700 | [diff] [blame] | 404 | rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_PRES | WM97XX_PEN_DOWN, |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 405 | &data->p); |
| 406 | if (rc != RC_VALID) |
| 407 | return rc; |
| 408 | } else |
| 409 | data->p = DEFAULT_PRESSURE; |
| 410 | } |
| 411 | return RC_VALID; |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * Enable WM9712 continuous mode, i.e. touch data is streamed across |
| 416 | * an AC97 slot |
| 417 | */ |
| 418 | static int wm9712_acc_enable(struct wm97xx *wm, int enable) |
| 419 | { |
| 420 | u16 dig1, dig2; |
| 421 | int ret = 0; |
| 422 | |
| 423 | dig1 = wm->dig[1]; |
| 424 | dig2 = wm->dig[2]; |
| 425 | |
| 426 | if (enable) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 427 | /* continuous mode */ |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 428 | if (wm->mach_ops->acc_startup) { |
| 429 | ret = wm->mach_ops->acc_startup(wm); |
| 430 | if (ret < 0) |
| 431 | return ret; |
| 432 | } |
| 433 | dig1 &= ~(WM97XX_CM_RATE_MASK | WM97XX_ADCSEL_MASK | |
| 434 | WM97XX_DELAY_MASK | WM97XX_SLT_MASK); |
| 435 | dig1 |= WM97XX_CTC | WM97XX_COO | WM97XX_SLEN | |
| 436 | WM97XX_DELAY(delay) | |
| 437 | WM97XX_SLT(wm->acc_slot) | |
| 438 | WM97XX_RATE(wm->acc_rate); |
| 439 | if (pil) |
| 440 | dig1 |= WM97XX_ADCSEL_PRES; |
| 441 | dig2 |= WM9712_PDEN; |
| 442 | } else { |
| 443 | dig1 &= ~(WM97XX_CTC | WM97XX_COO | WM97XX_SLEN); |
| 444 | dig2 &= ~WM9712_PDEN; |
| 445 | if (wm->mach_ops->acc_shutdown) |
| 446 | wm->mach_ops->acc_shutdown(wm); |
| 447 | } |
| 448 | |
| 449 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); |
| 450 | wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | struct wm97xx_codec_drv wm9712_codec = { |
| 456 | .id = WM9712_ID2, |
| 457 | .name = "wm9712", |
| 458 | .poll_sample = wm9712_poll_sample, |
| 459 | .poll_touch = wm9712_poll_touch, |
| 460 | .acc_enable = wm9712_acc_enable, |
| 461 | .phy_init = wm9712_phy_init, |
| 462 | .dig_enable = wm9712_dig_enable, |
| 463 | .dig_restore = wm9712_dig_restore, |
| 464 | .aux_prepare = wm9712_aux_prepare, |
| 465 | }; |
| 466 | EXPORT_SYMBOL_GPL(wm9712_codec); |
| 467 | |
| 468 | /* Module information */ |
Liam Girdwood | b8d055a | 2008-10-13 23:00:15 -0400 | [diff] [blame] | 469 | MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>"); |
Mark Brown | de22b9e | 2008-04-02 00:51:26 -0400 | [diff] [blame] | 470 | MODULE_DESCRIPTION("WM9712 Touch Screen Driver"); |
| 471 | MODULE_LICENSE("GPL"); |