/* * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip. * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pxa2xx-pcm.h" #include "pxa2xx-ac97.h" static DEFINE_MUTEX(car_mutex); static DECLARE_WAIT_QUEUE_HEAD(gsr_wq); static volatile long gsr_bits; static struct clk *ac97_clk; #ifdef CONFIG_PXA27x static struct clk *ac97conf_clk; #endif /* * 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). */ static 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/modem space */ #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx) reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE; #else if (reg == AC97_GPIO_STATUS) reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE; else reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE; #endif reg_addr += (reg >> 1); #ifndef CONFIG_PXA27x if (reg == AC97_GPIO_STATUS) { /* read from controller cache */ val = *reg_addr; goto out; } #endif /* start read access across the ac97 link */ GSR = GSR_CDONE | GSR_SDONE; gsr_bits = 0; val = *reg_addr; wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1); if (!((GSR | gsr_bits) & GSR_SDONE)) { printk(KERN_ERR "%s: read error (ac97_reg=%x GSR=%#lx)\n", __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; } static 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/modem space */ #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx) reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE; #else if (reg == AC97_GPIO_STATUS) reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE; else reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE; #endif reg_addr += (reg >> 1); GSR = GSR_CDONE | GSR_SDONE; gsr_bits = 0; *reg_addr = val; wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_CDONE, 1); if (!((GSR | gsr_bits) & GSR_CDONE)) printk(KERN_ERR "%s: write error (ac97_reg=%x GSR=%#lx)\n", __func__, reg, GSR | gsr_bits); mutex_unlock(&car_mutex); } static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97) { #ifdef CONFIG_PXA3xx int timeout = 100; #endif gsr_bits = 0; #ifdef CONFIG_PXA27x /* warm reset broken on Bulverde, so manually keep AC97 reset high */ pxa_gpio_mode(113 | GPIO_OUT | GPIO_DFLT_HIGH); udelay(10); GCR |= GCR_WARM_RST; pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT); udelay(500); #elif defined(CONFIG_PXA3xx) /* Can't use interrupts */ GCR |= GCR_WARM_RST; while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--) mdelay(1); #else GCR |= GCR_WARM_RST | GCR_PRIRDY_IEN | GCR_SECRDY_IEN; wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1); #endif if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR))) printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n", __func__, gsr_bits); GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN); GCR |= GCR_SDONE_IE|GCR_CDONE_IE; } static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97) { #ifdef CONFIG_PXA3xx int timeout = 1000; /* Hold CLKBPB for 100us */ GCR = 0; GCR = GCR_CLKBPB; udelay(100); GCR = 0; #endif GCR &= GCR_COLD_RST; /* clear everything but nCRST */ GCR &= ~GCR_COLD_RST; /* then assert nCRST */ gsr_bits = 0; #ifdef CONFIG_PXA27x /* 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); #elif defined(CONFIG_PXA3xx) /* 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); #else GCR = GCR_COLD_RST; GCR |= GCR_CDONE_IE|GCR_SDONE_IE; wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1); #endif if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR))) printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n", __func__, gsr_bits); GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN); GCR |= GCR_SDONE_IE|GCR_CDONE_IE; } 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); #ifdef CONFIG_PXA27x /* 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)... */ MISR = MISR_EOC; PISR = PISR_EOC; MCSR = MCSR_EOC; #endif return IRQ_HANDLED; } return IRQ_NONE; } struct snd_ac97_bus_ops soc_ac97_ops = { .read = pxa2xx_ac97_read, .write = pxa2xx_ac97_write, .warm_reset = pxa2xx_ac97_warm_reset, .reset = pxa2xx_ac97_cold_reset, }; static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_out = { .name = "AC97 PCM Stereo out", .dev_addr = __PREG(PCDR), .drcmr = &DRCMR(12), .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_BURST32 | DCMD_WIDTH4, }; static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_in = { .name = "AC97 PCM Stereo in", .dev_addr = __PREG(PCDR), .drcmr = &DRCMR(11), .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_BURST32 | DCMD_WIDTH4, }; static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_out = { .name = "AC97 Aux PCM (Slot 5) Mono out", .dev_addr = __PREG(MODR), .drcmr = &DRCMR(10), .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_BURST16 | DCMD_WIDTH2, }; static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_in = { .name = "AC97 Aux PCM (Slot 5) Mono in", .dev_addr = __PREG(MODR), .drcmr = &DRCMR(9), .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_BURST16 | DCMD_WIDTH2, }; static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_mic_mono_in = { .name = "AC97 Mic PCM (Slot 6) Mono in", .dev_addr = __PREG(MCDR), .drcmr = &DRCMR(8), .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_BURST16 | DCMD_WIDTH2, }; #ifdef CONFIG_PM static int pxa2xx_ac97_suspend(struct platform_device *pdev, struct snd_soc_dai *dai) { GCR |= GCR_ACLINK_OFF; clk_disable(ac97_clk); return 0; } static int pxa2xx_ac97_resume(struct platform_device *pdev, struct snd_soc_dai *dai) { clk_enable(ac97_clk); return 0; } #else #define pxa2xx_ac97_suspend NULL #define pxa2xx_ac97_resume NULL #endif static int pxa2xx_ac97_probe(struct platform_device *pdev, struct snd_soc_dai *dai) { int ret; ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, IRQF_DISABLED, "AC97", NULL); if (ret < 0) goto err; pxa_gpio_mode(GPIO31_SYNC_AC97_MD); pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD); pxa_gpio_mode(GPIO28_BITCLK_AC97_MD); pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD); #ifdef CONFIG_PXA27x /* Use GPIO 113 as AC97 Reset on Bulverde */ pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT); ac97conf_clk = clk_get(&pdev->dev, "AC97CONFCLK"); if (IS_ERR(ac97conf_clk)) { ret = PTR_ERR(ac97conf_clk); ac97conf_clk = NULL; goto err_irq; } #endif ac97_clk = clk_get(&pdev->dev, "AC97CLK"); if (IS_ERR(ac97_clk)) { ret = PTR_ERR(ac97_clk); ac97_clk = NULL; goto err_irq; } clk_enable(ac97_clk); return 0; err_irq: GCR |= GCR_ACLINK_OFF; #ifdef CONFIG_PXA27x if (ac97conf_clk) { clk_put(ac97conf_clk); ac97conf_clk = NULL; } #endif free_irq(IRQ_AC97, NULL); err: return ret; } static void pxa2xx_ac97_remove(struct platform_device *pdev, struct snd_soc_dai *dai) { GCR |= GCR_ACLINK_OFF; free_irq(IRQ_AC97, NULL); #ifdef CONFIG_PXA27x clk_put(ac97conf_clk); ac97conf_clk = NULL; #endif clk_disable(ac97_clk); clk_put(ac97_clk); ac97_clk = NULL; } static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) cpu_dai->dma_data = &pxa2xx_ac97_pcm_stereo_out; else cpu_dai->dma_data = &pxa2xx_ac97_pcm_stereo_in; return 0; } static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) cpu_dai->dma_data = &pxa2xx_ac97_pcm_aux_mono_out; else cpu_dai->dma_data = &pxa2xx_ac97_pcm_aux_mono_in; return 0; } static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) return -ENODEV; else cpu_dai->dma_data = &pxa2xx_ac97_pcm_mic_mono_in; return 0; } #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \ SNDRV_PCM_RATE_48000) /* * There is only 1 physical AC97 interface for pxa2xx, but it * has extra fifo's that can be used for aux DACs and ADCs. */ struct snd_soc_dai pxa_ac97_dai[] = { { .name = "pxa2xx-ac97", .id = 0, .type = SND_SOC_DAI_AC97, .probe = pxa2xx_ac97_probe, .remove = pxa2xx_ac97_remove, .suspend = pxa2xx_ac97_suspend, .resume = pxa2xx_ac97_resume, .playback = { .stream_name = "AC97 Playback", .channels_min = 2, .channels_max = 2, .rates = PXA2XX_AC97_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE,}, .capture = { .stream_name = "AC97 Capture", .channels_min = 2, .channels_max = 2, .rates = PXA2XX_AC97_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE,}, .ops = { .hw_params = pxa2xx_ac97_hw_params,}, }, { .name = "pxa2xx-ac97-aux", .id = 1, .type = SND_SOC_DAI_AC97, .playback = { .stream_name = "AC97 Aux Playback", .channels_min = 1, .channels_max = 1, .rates = PXA2XX_AC97_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE,}, .capture = { .stream_name = "AC97 Aux Capture", .channels_min = 1, .channels_max = 1, .rates = PXA2XX_AC97_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE,}, .ops = { .hw_params = pxa2xx_ac97_hw_aux_params,}, }, { .name = "pxa2xx-ac97-mic", .id = 2, .type = SND_SOC_DAI_AC97, .capture = { .stream_name = "AC97 Mic Capture", .channels_min = 1, .channels_max = 1, .rates = PXA2XX_AC97_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE,}, .ops = { .hw_params = pxa2xx_ac97_hw_mic_params,}, }, }; EXPORT_SYMBOL_GPL(pxa_ac97_dai); EXPORT_SYMBOL_GPL(soc_ac97_ops); MODULE_AUTHOR("Nicolas Pitre"); MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); MODULE_LICENSE("GPL");