#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
-
- 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;
- }
+ pxa2xx_ac97_try_cold_reset(ac97);
- return IRQ_NONE;
+ pxa2xx_ac97_finish_reset(ac97);
}
struct snd_ac97_bus_ops soc_ac97_ops = {
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)
{
- clk_enable(ac97_clk);
- return 0;
+ return pxa2xx_ac97_hw_resume();
}
#else
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,
projects / h-e-n / blobdiff