Blame view
sound/arm/pxa2xx-ac97-lib.c
8.31 KB
9c6363422 ALSA: Separate co... |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 |
/* * Based on sound/arm/pxa2xx-ac97.c and sound/soc/pxa/pxa2xx-ac97.c * which contain: * * Author: Nicolas Pitre * Created: Dec 02, 2004 * Copyright: MontaVista Software Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/interrupt.h> #include <linux/clk.h> #include <linux/delay.h> |
da155d5b4 sound: Add module... |
19 |
#include <linux/module.h> |
9c6363422 ALSA: Separate co... |
20 21 22 23 24 |
#include <sound/ac97_codec.h> #include <sound/pxa2xx-lib.h> #include <asm/irq.h> |
1f017a996 [ARM] pxa: move A... |
25 |
#include <mach/regs-ac97.h> |
9c6363422 ALSA: Separate co... |
26 27 28 29 30 31 |
#include <mach/audio.h> static DEFINE_MUTEX(car_mutex); static DECLARE_WAIT_QUEUE_HEAD(gsr_wq); static volatile long gsr_bits; static struct clk *ac97_clk; |
9c6363422 ALSA: Separate co... |
32 |
static struct clk *ac97conf_clk; |
26ade896b ASoC: Allow choic... |
33 |
static int reset_gpio; |
9c6363422 ALSA: Separate co... |
34 |
|
fb1bf8cd1 [ARM] pxa: introd... |
35 |
extern void pxa27x_assert_ac97reset(int reset_gpio, int on); |
9c6363422 ALSA: Separate co... |
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 |
/* * Beware PXA27x bugs: * * o Slot 12 read from modem space will hang controller. * o CDONE, SDONE interrupt fails after any slot 12 IO. * * We therefore have an hybrid approach for waiting on SDONE (interrupt or * 1 jiffy timeout if interrupt never comes). */ unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg) { unsigned short val = -1; volatile u32 *reg_addr; mutex_lock(&car_mutex); /* set up primary or secondary codec space */ |
8825e8e8d ALSA: Fix pxa2xx-... |
54 |
if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS) |
9c6363422 ALSA: Separate co... |
55 56 57 |
reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE; else reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE; |
9c6363422 ALSA: Separate co... |
58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 |
reg_addr += (reg >> 1); /* start read access across the ac97 link */ GSR = GSR_CDONE | GSR_SDONE; gsr_bits = 0; val = *reg_addr; if (reg == AC97_GPIO_STATUS) goto out; if (wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1) <= 0 && !((GSR | gsr_bits) & GSR_SDONE)) { printk(KERN_ERR "%s: read error (ac97_reg=%d GSR=%#lx) ", __func__, reg, GSR | gsr_bits); val = -1; goto out; } /* valid data now */ GSR = GSR_CDONE | GSR_SDONE; gsr_bits = 0; val = *reg_addr; /* but we've just started another cycle... */ wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1); out: mutex_unlock(&car_mutex); return val; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_read); void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) { volatile u32 *reg_addr; mutex_lock(&car_mutex); /* set up primary or secondary codec space */ |
8825e8e8d ALSA: Fix pxa2xx-... |
95 |
if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS) |
9c6363422 ALSA: Separate co... |
96 97 98 |
reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE; else reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE; |
9c6363422 ALSA: Separate co... |
99 100 101 102 103 104 105 106 107 108 109 110 111 112 |
reg_addr += (reg >> 1); GSR = GSR_CDONE | GSR_SDONE; gsr_bits = 0; *reg_addr = val; if (wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_CDONE, 1) <= 0 && !((GSR | gsr_bits) & GSR_CDONE)) printk(KERN_ERR "%s: write error (ac97_reg=%d GSR=%#lx) ", __func__, reg, GSR | gsr_bits); mutex_unlock(&car_mutex); } EXPORT_SYMBOL_GPL(pxa2xx_ac97_write); |
9d1cf39be ALSA: pxa2xx-ac97... |
113 114 |
#ifdef CONFIG_PXA25x static inline void pxa_ac97_warm_pxa25x(void) |
9c6363422 ALSA: Separate co... |
115 |
{ |
9c6363422 ALSA: Separate co... |
116 |
gsr_bits = 0; |
9d1cf39be ALSA: pxa2xx-ac97... |
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 |
GCR |= GCR_WARM_RST | GCR_PRIRDY_IEN | GCR_SECRDY_IEN; wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1); } static inline void pxa_ac97_cold_pxa25x(void) { GCR &= GCR_COLD_RST; /* clear everything but nCRST */ GCR &= ~GCR_COLD_RST; /* then assert nCRST */ gsr_bits = 0; GCR = GCR_COLD_RST; GCR |= GCR_CDONE_IE|GCR_SDONE_IE; wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1); } #endif |
9c6363422 ALSA: Separate co... |
133 |
#ifdef CONFIG_PXA27x |
9d1cf39be ALSA: pxa2xx-ac97... |
134 135 136 |
static inline void pxa_ac97_warm_pxa27x(void) { gsr_bits = 0; |
fb1bf8cd1 [ARM] pxa: introd... |
137 138 |
/* warm reset broken on Bulverde, so manually keep AC97 reset high */ pxa27x_assert_ac97reset(reset_gpio, 1); |
9c6363422 ALSA: Separate co... |
139 140 |
udelay(10); GCR |= GCR_WARM_RST; |
fb1bf8cd1 [ARM] pxa: introd... |
141 |
pxa27x_assert_ac97reset(reset_gpio, 0); |
9c6363422 ALSA: Separate co... |
142 |
udelay(500); |
9d1cf39be ALSA: pxa2xx-ac97... |
143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 |
} static inline void pxa_ac97_cold_pxa27x(void) { GCR &= GCR_COLD_RST; /* clear everything but nCRST */ GCR &= ~GCR_COLD_RST; /* then assert nCRST */ gsr_bits = 0; /* PXA27x Developers Manual section 13.5.2.2.1 */ clk_enable(ac97conf_clk); udelay(5); clk_disable(ac97conf_clk); GCR = GCR_COLD_RST; udelay(50); } |
9c6363422 ALSA: Separate co... |
159 |
#endif |
9d1cf39be ALSA: pxa2xx-ac97... |
160 161 162 163 |
#ifdef CONFIG_PXA3xx static inline void pxa_ac97_warm_pxa3xx(void) { int timeout = 100; |
9c6363422 ALSA: Separate co... |
164 |
|
9d1cf39be ALSA: pxa2xx-ac97... |
165 |
gsr_bits = 0; |
9c6363422 ALSA: Separate co... |
166 |
|
9d1cf39be ALSA: pxa2xx-ac97... |
167 168 169 170 |
/* Can't use interrupts */ GCR |= GCR_WARM_RST; while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--) mdelay(1); |
9c6363422 ALSA: Separate co... |
171 |
} |
9c6363422 ALSA: Separate co... |
172 |
|
9d1cf39be ALSA: pxa2xx-ac97... |
173 |
static inline void pxa_ac97_cold_pxa3xx(void) |
9c6363422 ALSA: Separate co... |
174 |
{ |
9c6363422 ALSA: Separate co... |
175 176 177 178 179 180 181 |
int timeout = 1000; /* Hold CLKBPB for 100us */ GCR = 0; GCR = GCR_CLKBPB; udelay(100); GCR = 0; |
9c6363422 ALSA: Separate co... |
182 183 184 185 186 |
GCR &= GCR_COLD_RST; /* clear everything but nCRST */ GCR &= ~GCR_COLD_RST; /* then assert nCRST */ gsr_bits = 0; |
9d1cf39be ALSA: pxa2xx-ac97... |
187 |
|
9c6363422 ALSA: Separate co... |
188 189 190 191 192 193 |
/* Can't use interrupts on PXA3xx */ GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN); GCR = GCR_WARM_RST | GCR_COLD_RST; while (!(GSR & (GSR_PCR | GSR_SCR)) && timeout--) mdelay(10); |
9d1cf39be ALSA: pxa2xx-ac97... |
194 195 196 197 198 |
} #endif bool pxa2xx_ac97_try_warm_reset(struct snd_ac97 *ac97) { |
057de50c0 pxa2xx-ac97: fix ... |
199 |
unsigned long gsr; |
9d1cf39be ALSA: pxa2xx-ac97... |
200 |
#ifdef CONFIG_PXA25x |
8825e8e8d ALSA: Fix pxa2xx-... |
201 |
if (cpu_is_pxa25x()) |
9d1cf39be ALSA: pxa2xx-ac97... |
202 203 |
pxa_ac97_warm_pxa25x(); else |
9c6363422 ALSA: Separate co... |
204 |
#endif |
9d1cf39be ALSA: pxa2xx-ac97... |
205 206 207 208 209 210 211 212 213 214 215 |
#ifdef CONFIG_PXA27x if (cpu_is_pxa27x()) pxa_ac97_warm_pxa27x(); else #endif #ifdef CONFIG_PXA3xx if (cpu_is_pxa3xx()) pxa_ac97_warm_pxa3xx(); else #endif BUG(); |
057de50c0 pxa2xx-ac97: fix ... |
216 217 |
gsr = GSR | gsr_bits; if (!(gsr & (GSR_PCR | GSR_SCR))) { |
9d1cf39be ALSA: pxa2xx-ac97... |
218 219 |
printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx) ", |
057de50c0 pxa2xx-ac97: fix ... |
220 |
__func__, gsr); |
9d1cf39be ALSA: pxa2xx-ac97... |
221 222 223 224 225 226 227 228 229 230 |
return false; } return true; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_warm_reset); bool pxa2xx_ac97_try_cold_reset(struct snd_ac97 *ac97) { |
057de50c0 pxa2xx-ac97: fix ... |
231 |
unsigned long gsr; |
9d1cf39be ALSA: pxa2xx-ac97... |
232 |
#ifdef CONFIG_PXA25x |
8825e8e8d ALSA: Fix pxa2xx-... |
233 |
if (cpu_is_pxa25x()) |
9d1cf39be ALSA: pxa2xx-ac97... |
234 235 236 237 238 239 240 241 242 243 244 245 246 247 |
pxa_ac97_cold_pxa25x(); else #endif #ifdef CONFIG_PXA27x if (cpu_is_pxa27x()) pxa_ac97_cold_pxa27x(); else #endif #ifdef CONFIG_PXA3xx if (cpu_is_pxa3xx()) pxa_ac97_cold_pxa3xx(); else #endif BUG(); |
9c6363422 ALSA: Separate co... |
248 |
|
057de50c0 pxa2xx-ac97: fix ... |
249 250 |
gsr = GSR | gsr_bits; if (!(gsr & (GSR_PCR | GSR_SCR))) { |
9c6363422 ALSA: Separate co... |
251 252 |
printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx) ", |
057de50c0 pxa2xx-ac97: fix ... |
253 |
__func__, gsr); |
9c6363422 ALSA: Separate co... |
254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 |
return false; } return true; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_cold_reset); void pxa2xx_ac97_finish_reset(struct snd_ac97 *ac97) { GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN); GCR |= GCR_SDONE_IE|GCR_CDONE_IE; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_finish_reset); static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id) { long status; status = GSR; if (status) { GSR = status; gsr_bits |= status; wake_up(&gsr_wq); |
9c6363422 ALSA: Separate co... |
279 280 281 |
/* Although we don't use those we still need to clear them since they tend to spuriously trigger when MMC is used (hardware bug? go figure)... */ |
9d1cf39be ALSA: pxa2xx-ac97... |
282 283 284 285 286 |
if (cpu_is_pxa27x()) { MISR = MISR_EOC; PISR = PISR_EOC; MCSR = MCSR_EOC; } |
9c6363422 ALSA: Separate co... |
287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 |
return IRQ_HANDLED; } return IRQ_NONE; } #ifdef CONFIG_PM int pxa2xx_ac97_hw_suspend(void) { GCR |= GCR_ACLINK_OFF; clk_disable(ac97_clk); return 0; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_suspend); int pxa2xx_ac97_hw_resume(void) { |
9c6363422 ALSA: Separate co... |
305 306 307 308 309 310 311 312 313 |
clk_enable(ac97_clk); return 0; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_resume); #endif int __devinit pxa2xx_ac97_hw_probe(struct platform_device *dev) { int ret; |
eae17754a [ARM] pxa: merge ... |
314 |
pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; |
26ade896b ASoC: Allow choic... |
315 316 317 318 319 320 321 322 323 324 325 326 327 |
if (pdata) { switch (pdata->reset_gpio) { case 95: case 113: reset_gpio = pdata->reset_gpio; break; case 0: reset_gpio = 113; break; case -1: break; default: |
1f2186951 ALSA: Fix wrong p... |
328 329 |
dev_err(&dev->dev, "Invalid reset GPIO %d ", |
26ade896b ASoC: Allow choic... |
330 331 332 333 334 335 |
pdata->reset_gpio); } } else { if (cpu_is_pxa27x()) reset_gpio = 113; } |
9c6363422 ALSA: Separate co... |
336 |
|
9d1cf39be ALSA: pxa2xx-ac97... |
337 338 |
if (cpu_is_pxa27x()) { /* Use GPIO 113 as AC97 Reset on Bulverde */ |
fb1bf8cd1 [ARM] pxa: introd... |
339 |
pxa27x_assert_ac97reset(reset_gpio, 0); |
9d1cf39be ALSA: pxa2xx-ac97... |
340 341 342 343 |
ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK"); if (IS_ERR(ac97conf_clk)) { ret = PTR_ERR(ac97conf_clk); ac97conf_clk = NULL; |
796123368 pxa2xx-ac97: swit... |
344 |
goto err_conf; |
9d1cf39be ALSA: pxa2xx-ac97... |
345 |
} |
9c6363422 ALSA: Separate co... |
346 |
} |
9c6363422 ALSA: Separate co... |
347 348 349 350 351 |
ac97_clk = clk_get(&dev->dev, "AC97CLK"); if (IS_ERR(ac97_clk)) { ret = PTR_ERR(ac97_clk); ac97_clk = NULL; |
796123368 pxa2xx-ac97: swit... |
352 |
goto err_clk; |
9c6363422 ALSA: Separate co... |
353 |
} |
796123368 pxa2xx-ac97: swit... |
354 355 356 |
ret = clk_enable(ac97_clk); if (ret) goto err_clk2; |
88e24c3a4 sound: irq: Remov... |
357 |
ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, 0, "AC97", NULL); |
796123368 pxa2xx-ac97: swit... |
358 359 360 361 |
if (ret < 0) goto err_irq; return 0; |
9c6363422 ALSA: Separate co... |
362 363 364 |
err_irq: GCR |= GCR_ACLINK_OFF; |
796123368 pxa2xx-ac97: swit... |
365 366 367 368 |
err_clk2: clk_put(ac97_clk); ac97_clk = NULL; err_clk: |
9c6363422 ALSA: Separate co... |
369 370 371 372 |
if (ac97conf_clk) { clk_put(ac97conf_clk); ac97conf_clk = NULL; } |
796123368 pxa2xx-ac97: swit... |
373 |
err_conf: |
9c6363422 ALSA: Separate co... |
374 375 376 377 378 379 380 381 |
return ret; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_probe); void pxa2xx_ac97_hw_remove(struct platform_device *dev) { GCR |= GCR_ACLINK_OFF; free_irq(IRQ_AC97, NULL); |
9d1cf39be ALSA: pxa2xx-ac97... |
382 383 384 385 |
if (ac97conf_clk) { clk_put(ac97conf_clk); ac97conf_clk = NULL; } |
9c6363422 ALSA: Separate co... |
386 387 388 389 390 391 392 393 394 |
clk_disable(ac97_clk); clk_put(ac97_clk); ac97_clk = NULL; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_remove); MODULE_AUTHOR("Nicolas Pitre"); MODULE_DESCRIPTION("Intel/Marvell PXA sound library"); MODULE_LICENSE("GPL"); |