diff options
Diffstat (limited to 'sound/soc/pxa/pxa2xx-ac97.c')
| -rw-r--r-- | sound/soc/pxa/pxa2xx-ac97.c | 282 |
1 files changed, 14 insertions, 268 deletions
diff --git a/sound/soc/pxa/pxa2xx-ac97.c b/sound/soc/pxa/pxa2xx-ac97.c index d94a495..a7a3a9c 100644 --- a/sound/soc/pxa/pxa2xx-ac97.c +++ b/sound/soc/pxa/pxa2xx-ac97.c @@ -13,225 +13,30 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/wait.h> -#include <linux/clk.h> -#include <linux/delay.h> #include <sound/core.h> -#include <sound/pcm.h> #include <sound/ac97_codec.h> -#include <sound/initval.h> #include <sound/soc.h> +#include <sound/pxa2xx-lib.h> -#include <asm/irq.h> -#include <linux/mutex.h> #include <mach/hardware.h> #include <mach/pxa-regs.h> -#include <mach/pxa2xx-gpio.h> -#include <mach/audio.h> #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); + pxa2xx_ac97_try_warm_reset(ac97); - GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN); - GCR |= GCR_SDONE_IE|GCR_CDONE_IE; + pxa2xx_ac97_finish_reset(ac97); } 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 + pxa2xx_ac97_try_cold_reset(ac97); - 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; + pxa2xx_ac97_finish_reset(ac97); } struct snd_ac97_bus_ops soc_ac97_ops = { @@ -244,7 +49,7 @@ struct snd_ac97_bus_ops soc_ac97_ops = { static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_out = { .name = "AC97 PCM Stereo out", .dev_addr = __PREG(PCDR), - .drcmr = &DRCMRTXPCDR, + .drcmr = &DRCMR(12), .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_BURST32 | DCMD_WIDTH4, }; @@ -252,7 +57,7 @@ static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_out = { static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_in = { .name = "AC97 PCM Stereo in", .dev_addr = __PREG(PCDR), - .drcmr = &DRCMRRXPCDR, + .drcmr = &DRCMR(11), .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_BURST32 | DCMD_WIDTH4, }; @@ -260,7 +65,7 @@ static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_in = { 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 = &DRCMRTXMODR, + .drcmr = &DRCMR(10), .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_BURST16 | DCMD_WIDTH2, }; @@ -268,7 +73,7 @@ static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_out = { 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 = &DRCMRRXMODR, + .drcmr = &DRCMR(9), .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_BURST16 | DCMD_WIDTH2, }; @@ -276,7 +81,7 @@ static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_in = { 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 = &DRCMRRXMCDR, + .drcmr = &DRCMR(8), .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_BURST16 | DCMD_WIDTH2, }; @@ -285,24 +90,13 @@ static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_mic_mono_in = { static int pxa2xx_ac97_suspend(struct platform_device *pdev, struct snd_soc_dai *dai) { - GCR |= GCR_ACLINK_OFF; - clk_disable(ac97_clk); - return 0; + return pxa2xx_ac97_hw_suspend(); } static int pxa2xx_ac97_resume(struct platform_device *pdev, struct snd_soc_dai *dai) { - 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); -#endif - clk_enable(ac97_clk); - return 0; + return pxa2xx_ac97_hw_resume(); } #else @@ -313,61 +107,13 @@ static int pxa2xx_ac97_resume(struct platform_device *pdev, 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; + return pxa2xx_ac97_hw_probe(pdev); } 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; + pxa2xx_ac97_hw_remove(pdev); } static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream, |
