[deliverable/linux.git] / sound / arm / pxa2xx-ac97-lib.c

/*
 * 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>
#include <linux/module.h>
#include <linux/io.h>

#include <sound/ac97_codec.h>
#include <sound/pxa2xx-lib.h>

#include <mach/irqs.h>
#include <mach/regs-ac97.h>
#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;
static struct clk *ac97conf_clk;
static int reset_gpio;

extern void pxa27x_assert_ac97reset(int reset_gpio, int on);

/*
 * 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 */
	if (cpu_is_pxa25x() && 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;
	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)\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;
}
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 */
	if (cpu_is_pxa25x() && 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;
	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)\n",
				__func__, reg, GSR | gsr_bits);

	mutex_unlock(&car_mutex);
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_write);

#ifdef CONFIG_PXA25x
static inline void pxa_ac97_warm_pxa25x(void)
{
	gsr_bits = 0;

	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

#ifdef CONFIG_PXA27x
static inline void pxa_ac97_warm_pxa27x(void)
{
	gsr_bits = 0;

	/* warm reset broken on Bulverde, so manually keep AC97 reset high */
	pxa27x_assert_ac97reset(reset_gpio, 1);
	udelay(10);
	GCR |= GCR_WARM_RST;
	pxa27x_assert_ac97reset(reset_gpio, 0);
	udelay(500);
}

static inline void pxa_ac97_cold_pxa27x(void)
{
	unsigned int timeout;

	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 | GCR_WARM_RST;
	timeout = 100;     /* wait for the codec-ready bit to be set */
	while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
		mdelay(1);
}
#endif

#ifdef CONFIG_PXA3xx
static inline void pxa_ac97_warm_pxa3xx(void)
{
	int timeout = 100;

	gsr_bits = 0;

	/* Can't use interrupts */
	GCR |= GCR_WARM_RST;
	while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
		mdelay(1);
}

static inline void pxa_ac97_cold_pxa3xx(void)
{
	int timeout = 1000;

	/* Hold CLKBPB for 100us */
	GCR = 0;
	GCR = GCR_CLKBPB;
	udelay(100);
	GCR = 0;

	GCR &=  GCR_COLD_RST;  /* clear everything but nCRST */
	GCR &= ~GCR_COLD_RST;  /* then assert nCRST */

	gsr_bits = 0;

	/* 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);
}
#endif

bool pxa2xx_ac97_try_warm_reset(struct snd_ac97 *ac97)
{
	unsigned long gsr;

#ifdef CONFIG_PXA25x
	if (cpu_is_pxa25x())
		pxa_ac97_warm_pxa25x();
	else
#endif
#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();
	gsr = GSR | gsr_bits;
	if (!(gsr & (GSR_PCR | GSR_SCR))) {
		printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
				 __func__, gsr);

		return false;
	}

	return true;
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_warm_reset);

bool pxa2xx_ac97_try_cold_reset(struct snd_ac97 *ac97)
{
	unsigned long gsr;

#ifdef CONFIG_PXA25x
	if (cpu_is_pxa25x())
		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();

	gsr = GSR | gsr_bits;
	if (!(gsr & (GSR_PCR | GSR_SCR))) {
		printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
				 __func__, gsr);

		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);

		/* 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)... */
		if (cpu_is_pxa27x()) {
			MISR = MISR_EOC;
			PISR = PISR_EOC;
			MCSR = MCSR_EOC;
		}

		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)
{
	clk_enable(ac97_clk);
	return 0;
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_resume);
#endif

int pxa2xx_ac97_hw_probe(struct platform_device *dev)
{
	int ret;
	pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;

	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:
			dev_err(&dev->dev, "Invalid reset GPIO %d\n",
				pdata->reset_gpio);
		}
	} else {
		if (cpu_is_pxa27x())
			reset_gpio = 113;
	}

	if (cpu_is_pxa27x()) {
		/* Use GPIO 113 as AC97 Reset on Bulverde */
		pxa27x_assert_ac97reset(reset_gpio, 0);
		ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK");
		if (IS_ERR(ac97conf_clk)) {
			ret = PTR_ERR(ac97conf_clk);
			ac97conf_clk = NULL;
			goto err_conf;
		}
	}

	ac97_clk = clk_get(&dev->dev, "AC97CLK");
	if (IS_ERR(ac97_clk)) {
		ret = PTR_ERR(ac97_clk);
		ac97_clk = NULL;
		goto err_clk;
	}

	ret = clk_enable(ac97_clk);
	if (ret)
		goto err_clk2;

	ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, 0, "AC97", NULL);
	if (ret < 0)
		goto err_irq;

	return 0;

err_irq:
	GCR |= GCR_ACLINK_OFF;
err_clk2:
	clk_put(ac97_clk);
	ac97_clk = NULL;
err_clk:
	if (ac97conf_clk) {
		clk_put(ac97conf_clk);
		ac97conf_clk = NULL;
	}
err_conf:
	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);
	if (ac97conf_clk) {
		clk_put(ac97conf_clk);
		ac97conf_clk = NULL;
	}
	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");
Commit	Line	Data
9c636342 DB	1	/*
	2	* Based on sound/arm/pxa2xx-ac97.c and sound/soc/pxa/pxa2xx-ac97.c
	3	* which contain:
	4	*
	5	* Author: Nicolas Pitre
	6	* Created: Dec 02, 2004
	7	* Copyright: MontaVista Software Inc.
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
	14	#include <linux/kernel.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/clk.h>
	18	#include <linux/delay.h>
da155d5b	19	#include <linux/module.h>
23019a73	20	#include <linux/io.h>
9c636342 DB	21
	22	#include <sound/ac97_codec.h>
	23	#include <sound/pxa2xx-lib.h>
	24
9482ee71	25	#include <mach/irqs.h>
1f017a99	26	#include <mach/regs-ac97.h>
9c636342 DB	27	#include <mach/audio.h>
	28
	29	static DEFINE_MUTEX(car_mutex);
	30	static DECLARE_WAIT_QUEUE_HEAD(gsr_wq);
	31	static volatile long gsr_bits;
	32	static struct clk *ac97_clk;
9c636342	33	static struct clk *ac97conf_clk;
26ade896	34	static int reset_gpio;
9c636342	35
fb1bf8cd EM	36	extern void pxa27x_assert_ac97reset(int reset_gpio, int on);
fb1bf8cd EM	37
9c636342 DB	38	/*
	39	* Beware PXA27x bugs:
	40	*
	41	* o Slot 12 read from modem space will hang controller.
	42	* o CDONE, SDONE interrupt fails after any slot 12 IO.
	43	*
	44	* We therefore have an hybrid approach for waiting on SDONE (interrupt or
	45	* 1 jiffy timeout if interrupt never comes).
	46	*/
	47
	48	unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
	49	{
	50	unsigned short val = -1;
	51	volatile u32 *reg_addr;
	52
	53	mutex_lock(&car_mutex);
	54
	55	/* set up primary or secondary codec space */
8825e8e8	56	if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS)
9c636342 DB	57	reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE;
	58	else
	59	reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
9c636342 DB	60	reg_addr += (reg >> 1);
	61
	62	/* start read access across the ac97 link */
	63	GSR = GSR_CDONE \| GSR_SDONE;
	64	gsr_bits = 0;
	65	val = *reg_addr;
	66	if (reg == AC97_GPIO_STATUS)
	67	goto out;
	68	if (wait_event_timeout(gsr_wq, (GSR \| gsr_bits) & GSR_SDONE, 1) <= 0 &&
	69	!((GSR \| gsr_bits) & GSR_SDONE)) {
	70	printk(KERN_ERR "%s: read error (ac97_reg=%d GSR=%#lx)\n",
	71	__func__, reg, GSR \| gsr_bits);
	72	val = -1;
	73	goto out;
	74	}
	75
	76	/* valid data now */
	77	GSR = GSR_CDONE \| GSR_SDONE;
	78	gsr_bits = 0;
	79	val = *reg_addr;
	80	/* but we've just started another cycle... */
	81	wait_event_timeout(gsr_wq, (GSR \| gsr_bits) & GSR_SDONE, 1);
	82
	83	out: mutex_unlock(&car_mutex);
	84	return val;
	85	}
	86	EXPORT_SYMBOL_GPL(pxa2xx_ac97_read);
	87
	88	void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
	89	unsigned short val)
	90	{
	91	volatile u32 *reg_addr;
	92
	93	mutex_lock(&car_mutex);
	94
	95	/* set up primary or secondary codec space */
8825e8e8	96	if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS)
9c636342 DB	97	reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE;
	98	else
	99	reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
9c636342 DB	100	reg_addr += (reg >> 1);
	101
	102	GSR = GSR_CDONE \| GSR_SDONE;
	103	gsr_bits = 0;
	104	*reg_addr = val;
	105	if (wait_event_timeout(gsr_wq, (GSR \| gsr_bits) & GSR_CDONE, 1) <= 0 &&
	106	!((GSR \| gsr_bits) & GSR_CDONE))
	107	printk(KERN_ERR "%s: write error (ac97_reg=%d GSR=%#lx)\n",
	108	__func__, reg, GSR \| gsr_bits);
	109
	110	mutex_unlock(&car_mutex);
	111	}
	112	EXPORT_SYMBOL_GPL(pxa2xx_ac97_write);
	113
9d1cf39b DB	114	#ifdef CONFIG_PXA25x
9d1cf39b DB	115	static inline void pxa_ac97_warm_pxa25x(void)
9c636342	116	{
9c636342 DB	117	gsr_bits = 0;
9c636342 DB	118
9d1cf39b DB	119	GCR \|= GCR_WARM_RST \| GCR_PRIRDY_IEN \| GCR_SECRDY_IEN;
	120	wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR \| GSR_SCR), 1);
	121	}
	122
	123	static inline void pxa_ac97_cold_pxa25x(void)
	124	{
	125	GCR &= GCR_COLD_RST; /* clear everything but nCRST */
	126	GCR &= ~GCR_COLD_RST; /* then assert nCRST */
	127
	128	gsr_bits = 0;
	129
	130	GCR = GCR_COLD_RST;
	131	GCR \|= GCR_CDONE_IE\|GCR_SDONE_IE;
	132	wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR \| GSR_SCR), 1);
	133	}
	134	#endif
	135
9c636342	136	#ifdef CONFIG_PXA27x
9d1cf39b DB	137	static inline void pxa_ac97_warm_pxa27x(void)
	138	{
	139	gsr_bits = 0;
	140
fb1bf8cd EM	141	/* warm reset broken on Bulverde, so manually keep AC97 reset high */
fb1bf8cd EM	142	pxa27x_assert_ac97reset(reset_gpio, 1);
9c636342 DB	143	udelay(10);
9c636342 DB	144	GCR \|= GCR_WARM_RST;
fb1bf8cd	145	pxa27x_assert_ac97reset(reset_gpio, 0);
9c636342	146	udelay(500);
9d1cf39b DB	147	}
	148
	149	static inline void pxa_ac97_cold_pxa27x(void)
	150	{
41b645c8 MD	151	unsigned int timeout;
41b645c8 MD	152
9d1cf39b DB	153	GCR &= GCR_COLD_RST; /* clear everything but nCRST */
	154	GCR &= ~GCR_COLD_RST; /* then assert nCRST */
	155
	156	gsr_bits = 0;
	157
	158	/* PXA27x Developers Manual section 13.5.2.2.1 */
	159	clk_enable(ac97conf_clk);
	160	udelay(5);
	161	clk_disable(ac97conf_clk);
41b645c8 MD	162	GCR = GCR_COLD_RST \| GCR_WARM_RST;
	163	timeout = 100; /* wait for the codec-ready bit to be set */
	164	while (!((GSR \| gsr_bits) & (GSR_PCR \| GSR_SCR)) && timeout--)
	165	mdelay(1);
9d1cf39b	166	}
9c636342 DB	167	#endif
9c636342 DB	168
9d1cf39b DB	169	#ifdef CONFIG_PXA3xx
	170	static inline void pxa_ac97_warm_pxa3xx(void)
	171	{
	172	int timeout = 100;
9c636342	173
9d1cf39b	174	gsr_bits = 0;
9c636342	175
9d1cf39b DB	176	/* Can't use interrupts */
	177	GCR \|= GCR_WARM_RST;
	178	while (!((GSR \| gsr_bits) & (GSR_PCR \| GSR_SCR)) && timeout--)
	179	mdelay(1);
9c636342	180	}
9c636342	181
9d1cf39b	182	static inline void pxa_ac97_cold_pxa3xx(void)
9c636342	183	{
9c636342 DB	184	int timeout = 1000;
	185
	186	/* Hold CLKBPB for 100us */
	187	GCR = 0;
	188	GCR = GCR_CLKBPB;
	189	udelay(100);
	190	GCR = 0;
9c636342 DB	191
	192	GCR &= GCR_COLD_RST; /* clear everything but nCRST */
	193	GCR &= ~GCR_COLD_RST; /* then assert nCRST */
	194
	195	gsr_bits = 0;
9d1cf39b	196
9c636342 DB	197	/* Can't use interrupts on PXA3xx */
	198	GCR &= ~(GCR_PRIRDY_IEN\|GCR_SECRDY_IEN);
	199
	200	GCR = GCR_WARM_RST \| GCR_COLD_RST;
	201	while (!(GSR & (GSR_PCR \| GSR_SCR)) && timeout--)
	202	mdelay(10);
9d1cf39b DB	203	}
	204	#endif
	205
	206	bool pxa2xx_ac97_try_warm_reset(struct snd_ac97 *ac97)
	207	{
057de50c LF	208	unsigned long gsr;
057de50c LF	209
9d1cf39b	210	#ifdef CONFIG_PXA25x
8825e8e8	211	if (cpu_is_pxa25x())
9d1cf39b DB	212	pxa_ac97_warm_pxa25x();
9d1cf39b DB	213	else
9c636342	214	#endif
9d1cf39b DB	215	#ifdef CONFIG_PXA27x
	216	if (cpu_is_pxa27x())
	217	pxa_ac97_warm_pxa27x();
	218	else
	219	#endif
	220	#ifdef CONFIG_PXA3xx
	221	if (cpu_is_pxa3xx())
	222	pxa_ac97_warm_pxa3xx();
	223	else
	224	#endif
	225	BUG();
057de50c LF	226	gsr = GSR \| gsr_bits;
057de50c LF	227	if (!(gsr & (GSR_PCR \| GSR_SCR))) {
9d1cf39b	228	printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
057de50c	229	__func__, gsr);
9d1cf39b DB	230
	231	return false;
	232	}
	233
	234	return true;
	235	}
	236	EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_warm_reset);
	237
	238	bool pxa2xx_ac97_try_cold_reset(struct snd_ac97 *ac97)
	239	{
057de50c LF	240	unsigned long gsr;
057de50c LF	241
9d1cf39b	242	#ifdef CONFIG_PXA25x
8825e8e8	243	if (cpu_is_pxa25x())
9d1cf39b DB	244	pxa_ac97_cold_pxa25x();
	245	else
	246	#endif
	247	#ifdef CONFIG_PXA27x
	248	if (cpu_is_pxa27x())
	249	pxa_ac97_cold_pxa27x();
	250	else
	251	#endif
	252	#ifdef CONFIG_PXA3xx
	253	if (cpu_is_pxa3xx())
	254	pxa_ac97_cold_pxa3xx();
	255	else
	256	#endif
	257	BUG();
9c636342	258
057de50c LF	259	gsr = GSR \| gsr_bits;
057de50c LF	260	if (!(gsr & (GSR_PCR \| GSR_SCR))) {
9c636342	261	printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
057de50c	262	__func__, gsr);
9c636342 DB	263
	264	return false;
	265	}
	266
	267	return true;
	268	}
	269	EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_cold_reset);
	270
	271
	272	void pxa2xx_ac97_finish_reset(struct snd_ac97 *ac97)
	273	{
	274	GCR &= ~(GCR_PRIRDY_IEN\|GCR_SECRDY_IEN);
	275	GCR \|= GCR_SDONE_IE\|GCR_CDONE_IE;
	276	}
	277	EXPORT_SYMBOL_GPL(pxa2xx_ac97_finish_reset);
	278
	279	static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id)
	280	{
	281	long status;
	282
	283	status = GSR;
	284	if (status) {
	285	GSR = status;
	286	gsr_bits \|= status;
	287	wake_up(&gsr_wq);
	288
9c636342 DB	289	/* Although we don't use those we still need to clear them
	290	since they tend to spuriously trigger when MMC is used
	291	(hardware bug? go figure)... */
9d1cf39b DB	292	if (cpu_is_pxa27x()) {
	293	MISR = MISR_EOC;
	294	PISR = PISR_EOC;
	295	MCSR = MCSR_EOC;
	296	}
9c636342 DB	297
	298	return IRQ_HANDLED;
	299	}
	300
	301	return IRQ_NONE;
	302	}
	303
	304	#ifdef CONFIG_PM
	305	int pxa2xx_ac97_hw_suspend(void)
	306	{
	307	GCR \|= GCR_ACLINK_OFF;
	308	clk_disable(ac97_clk);
	309	return 0;
	310	}
	311	EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_suspend);
	312
	313	int pxa2xx_ac97_hw_resume(void)
	314	{
9c636342 DB	315	clk_enable(ac97_clk);
	316	return 0;
	317	}
	318	EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_resume);
	319	#endif
	320
e21596bb	321	int pxa2xx_ac97_hw_probe(struct platform_device *dev)
9c636342 DB	322	{
9c636342 DB	323	int ret;
eae17754	324	pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
26ade896 RJ	325
	326	if (pdata) {
	327	switch (pdata->reset_gpio) {
	328	case 95:
	329	case 113:
	330	reset_gpio = pdata->reset_gpio;
	331	break;
	332	case 0:
	333	reset_gpio = 113;
	334	break;
	335	case -1:
	336	break;
	337	default:
1f218695	338	dev_err(&dev->dev, "Invalid reset GPIO %d\n",
26ade896 RJ	339	pdata->reset_gpio);
	340	}
	341	} else {
	342	if (cpu_is_pxa27x())
	343	reset_gpio = 113;
	344	}
9c636342	345
9d1cf39b DB	346	if (cpu_is_pxa27x()) {
9d1cf39b DB	347	/* Use GPIO 113 as AC97 Reset on Bulverde */
fb1bf8cd	348	pxa27x_assert_ac97reset(reset_gpio, 0);
9d1cf39b DB	349	ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK");
	350	if (IS_ERR(ac97conf_clk)) {
	351	ret = PTR_ERR(ac97conf_clk);
	352	ac97conf_clk = NULL;
79612336	353	goto err_conf;
9d1cf39b	354	}
9c636342	355	}
9c636342 DB	356
	357	ac97_clk = clk_get(&dev->dev, "AC97CLK");
	358	if (IS_ERR(ac97_clk)) {
	359	ret = PTR_ERR(ac97_clk);
	360	ac97_clk = NULL;
79612336	361	goto err_clk;
9c636342 DB	362	}
9c636342 DB	363
79612336 DB	364	ret = clk_enable(ac97_clk);
	365	if (ret)
	366	goto err_clk2;
	367
88e24c3a	368	ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, 0, "AC97", NULL);
79612336 DB	369	if (ret < 0)
	370	goto err_irq;
	371
	372	return 0;
9c636342 DB	373
	374	err_irq:
	375	GCR \|= GCR_ACLINK_OFF;
79612336 DB	376	err_clk2:
	377	clk_put(ac97_clk);
	378	ac97_clk = NULL;
	379	err_clk:
9c636342 DB	380	if (ac97conf_clk) {
	381	clk_put(ac97conf_clk);
	382	ac97conf_clk = NULL;
	383	}
79612336	384	err_conf:
9c636342 DB	385	return ret;
	386	}
	387	EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_probe);
	388
	389	void pxa2xx_ac97_hw_remove(struct platform_device *dev)
	390	{
	391	GCR \|= GCR_ACLINK_OFF;
	392	free_irq(IRQ_AC97, NULL);
9d1cf39b DB	393	if (ac97conf_clk) {
	394	clk_put(ac97conf_clk);
	395	ac97conf_clk = NULL;
	396	}
9c636342 DB	397	clk_disable(ac97_clk);
	398	clk_put(ac97_clk);
	399	ac97_clk = NULL;
	400	}
	401	EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_remove);
	402
	403	MODULE_AUTHOR("Nicolas Pitre");
	404	MODULE_DESCRIPTION("Intel/Marvell PXA sound library");
	405	MODULE_LICENSE("GPL");
	406