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Diffstat (limited to 'sound/arm/pxa2xx-ac97-lib.c')
-rw-r--r--sound/arm/pxa2xx-ac97-lib.c166
1 files changed, 98 insertions, 68 deletions
diff --git a/sound/arm/pxa2xx-ac97-lib.c b/sound/arm/pxa2xx-ac97-lib.c
index 8eafd3d3dff6..64510318091f 100644
--- a/sound/arm/pxa2xx-ac97-lib.c
+++ b/sound/arm/pxa2xx-ac97-lib.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Based on sound/arm/pxa2xx-ac97.c and sound/soc/pxa/pxa2xx-ac97.c
* which contain:
@@ -5,10 +6,6 @@
* 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>
@@ -20,12 +17,13 @@
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
+#include <linux/soc/pxa/cpu.h>
#include <sound/pxa2xx-lib.h>
-#include <mach/irqs.h>
-#include <mach/regs-ac97.h>
-#include <mach/audio.h>
+#include <linux/platform_data/asoc-pxa.h>
+
+#include "pxa2xx-ac97-regs.h"
static DEFINE_MUTEX(car_mutex);
static DECLARE_WAIT_QUEUE_HEAD(gsr_wq);
@@ -33,8 +31,7 @@ static volatile long gsr_bits;
static struct clk *ac97_clk;
static struct clk *ac97conf_clk;
static int reset_gpio;
-
-extern void pxa27x_configure_ac97reset(int reset_gpio, bool to_gpio);
+static void __iomem *ac97_reg_base;
/*
* Beware PXA27x bugs:
@@ -49,71 +46,71 @@ extern void pxa27x_configure_ac97reset(int reset_gpio, bool to_gpio);
int pxa2xx_ac97_read(int slot, unsigned short reg)
{
int val = -ENODEV;
- volatile u32 *reg_addr;
+ u32 __iomem *reg_addr;
if (slot > 0)
return -ENODEV;
- mutex_lock(&car_mutex);
+ guard(mutex)(&car_mutex);
/* set up primary or secondary codec space */
if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS)
- reg_addr = slot ? &SMC_REG_BASE : &PMC_REG_BASE;
+ reg_addr = ac97_reg_base +
+ (slot ? SMC_REG_BASE : PMC_REG_BASE);
else
- reg_addr = slot ? &SAC_REG_BASE : &PAC_REG_BASE;
+ reg_addr = ac97_reg_base +
+ (slot ? SAC_REG_BASE : PAC_REG_BASE);
reg_addr += (reg >> 1);
/* start read access across the ac97 link */
- GSR = GSR_CDONE | GSR_SDONE;
+ writel(GSR_CDONE | GSR_SDONE, ac97_reg_base + GSR);
gsr_bits = 0;
- val = (*reg_addr & 0xffff);
+ val = (readl(reg_addr) & 0xffff);
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)) {
+ return val;
+ if (wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE, 1) <= 0 &&
+ !((readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE)) {
printk(KERN_ERR "%s: read error (ac97_reg=%d GSR=%#lx)\n",
- __func__, reg, GSR | gsr_bits);
- val = -ETIMEDOUT;
- goto out;
+ __func__, reg, readl(ac97_reg_base + GSR) | gsr_bits);
+ return -ETIMEDOUT;
}
/* valid data now */
- GSR = GSR_CDONE | GSR_SDONE;
+ writel(GSR_CDONE | GSR_SDONE, ac97_reg_base + GSR);
gsr_bits = 0;
- val = (*reg_addr & 0xffff);
+ val = (readl(reg_addr) & 0xffff);
/* but we've just started another cycle... */
- wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1);
-
-out: mutex_unlock(&car_mutex);
+ wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE, 1);
return val;
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_read);
int pxa2xx_ac97_write(int slot, unsigned short reg, unsigned short val)
{
- volatile u32 *reg_addr;
+ u32 __iomem *reg_addr;
int ret = 0;
- mutex_lock(&car_mutex);
+ guard(mutex)(&car_mutex);
/* set up primary or secondary codec space */
if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS)
- reg_addr = slot ? &SMC_REG_BASE : &PMC_REG_BASE;
+ reg_addr = ac97_reg_base +
+ (slot ? SMC_REG_BASE : PMC_REG_BASE);
else
- reg_addr = slot ? &SAC_REG_BASE : &PAC_REG_BASE;
+ reg_addr = ac97_reg_base +
+ (slot ? SAC_REG_BASE : PAC_REG_BASE);
reg_addr += (reg >> 1);
- GSR = GSR_CDONE | GSR_SDONE;
+ writel(GSR_CDONE | GSR_SDONE, ac97_reg_base + GSR);
gsr_bits = 0;
- *reg_addr = val;
- if (wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_CDONE, 1) <= 0 &&
- !((GSR | gsr_bits) & GSR_CDONE)) {
+ writel(val, reg_addr);
+ if (wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_CDONE, 1) <= 0 &&
+ !((readl(ac97_reg_base + GSR) | gsr_bits) & GSR_CDONE)) {
printk(KERN_ERR "%s: write error (ac97_reg=%d GSR=%#lx)\n",
- __func__, reg, GSR | gsr_bits);
+ __func__, reg, readl(ac97_reg_base + GSR) | gsr_bits);
ret = -EIO;
}
- mutex_unlock(&car_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_write);
@@ -123,17 +120,17 @@ static inline void pxa_ac97_warm_pxa25x(void)
{
gsr_bits = 0;
- GCR |= GCR_WARM_RST;
+ writel(readl(ac97_reg_base + GCR) | (GCR_WARM_RST), ac97_reg_base + GCR);
}
static inline void pxa_ac97_cold_pxa25x(void)
{
- GCR &= GCR_COLD_RST; /* clear everything but nCRST */
- GCR &= ~GCR_COLD_RST; /* then assert nCRST */
+ writel(readl(ac97_reg_base + GCR) & ( GCR_COLD_RST), ac97_reg_base + GCR); /* clear everything but nCRST */
+ writel(readl(ac97_reg_base + GCR) & (~GCR_COLD_RST), ac97_reg_base + GCR); /* then assert nCRST */
gsr_bits = 0;
- GCR = GCR_COLD_RST;
+ writel(GCR_COLD_RST, ac97_reg_base + GCR);
}
#endif
@@ -145,15 +142,15 @@ static inline void pxa_ac97_warm_pxa27x(void)
/* warm reset broken on Bulverde, so manually keep AC97 reset high */
pxa27x_configure_ac97reset(reset_gpio, true);
udelay(10);
- GCR |= GCR_WARM_RST;
+ writel(readl(ac97_reg_base + GCR) | (GCR_WARM_RST), ac97_reg_base + GCR);
pxa27x_configure_ac97reset(reset_gpio, false);
udelay(500);
}
static inline void pxa_ac97_cold_pxa27x(void)
{
- GCR &= GCR_COLD_RST; /* clear everything but nCRST */
- GCR &= ~GCR_COLD_RST; /* then assert nCRST */
+ writel(readl(ac97_reg_base + GCR) & ( GCR_COLD_RST), ac97_reg_base + GCR); /* clear everything but nCRST */
+ writel(readl(ac97_reg_base + GCR) & (~GCR_COLD_RST), ac97_reg_base + GCR); /* then assert nCRST */
gsr_bits = 0;
@@ -161,7 +158,7 @@ static inline void pxa_ac97_cold_pxa27x(void)
clk_prepare_enable(ac97conf_clk);
udelay(5);
clk_disable_unprepare(ac97conf_clk);
- GCR = GCR_COLD_RST | GCR_WARM_RST;
+ writel(GCR_COLD_RST | GCR_WARM_RST, ac97_reg_base + GCR);
}
#endif
@@ -171,26 +168,26 @@ static inline void pxa_ac97_warm_pxa3xx(void)
gsr_bits = 0;
/* Can't use interrupts */
- GCR |= GCR_WARM_RST;
+ writel(readl(ac97_reg_base + GCR) | (GCR_WARM_RST), ac97_reg_base + GCR);
}
static inline void pxa_ac97_cold_pxa3xx(void)
{
/* Hold CLKBPB for 100us */
- GCR = 0;
- GCR = GCR_CLKBPB;
+ writel(0, ac97_reg_base + GCR);
+ writel(GCR_CLKBPB, ac97_reg_base + GCR);
udelay(100);
- GCR = 0;
+ writel(0, ac97_reg_base + GCR);
- GCR &= GCR_COLD_RST; /* clear everything but nCRST */
- GCR &= ~GCR_COLD_RST; /* then assert nCRST */
+ writel(readl(ac97_reg_base + GCR) & ( GCR_COLD_RST), ac97_reg_base + GCR); /* clear everything but nCRST */
+ writel(readl(ac97_reg_base + GCR) & (~GCR_COLD_RST), ac97_reg_base + GCR); /* then assert nCRST */
gsr_bits = 0;
/* Can't use interrupts on PXA3xx */
- GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
+ writel(readl(ac97_reg_base + GCR) & (~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN)), ac97_reg_base + GCR);
- GCR = GCR_WARM_RST | GCR_COLD_RST;
+ writel(GCR_WARM_RST | GCR_COLD_RST, ac97_reg_base + GCR);
}
#endif
@@ -216,10 +213,10 @@ bool pxa2xx_ac97_try_warm_reset(void)
#endif
snd_BUG();
- while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
+ while (!((readl(ac97_reg_base + GSR) | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
mdelay(1);
- gsr = GSR | gsr_bits;
+ gsr = readl(ac97_reg_base + GSR) | gsr_bits;
if (!(gsr & (GSR_PCR | GSR_SCR))) {
printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
__func__, gsr);
@@ -253,10 +250,10 @@ bool pxa2xx_ac97_try_cold_reset(void)
#endif
snd_BUG();
- while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
+ while (!((readl(ac97_reg_base + GSR) | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)
mdelay(1);
- gsr = GSR | gsr_bits;
+ gsr = readl(ac97_reg_base + GSR) | gsr_bits;
if (!(gsr & (GSR_PCR | GSR_SCR))) {
printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
__func__, gsr);
@@ -271,8 +268,10 @@ EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_cold_reset);
void pxa2xx_ac97_finish_reset(void)
{
- GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
- GCR |= GCR_SDONE_IE|GCR_CDONE_IE;
+ u32 gcr = readl(ac97_reg_base + GCR);
+ gcr &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
+ gcr |= GCR_SDONE_IE|GCR_CDONE_IE;
+ writel(gcr, ac97_reg_base + GCR);
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_finish_reset);
@@ -280,9 +279,9 @@ static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id)
{
long status;
- status = GSR;
+ status = readl(ac97_reg_base + GSR);
if (status) {
- GSR = status;
+ writel(status, ac97_reg_base + GSR);
gsr_bits |= status;
wake_up(&gsr_wq);
@@ -290,9 +289,9 @@ static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id)
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;
+ writel(MISR_EOC, ac97_reg_base + MISR);
+ writel(PISR_EOC, ac97_reg_base + PISR);
+ writel(MCSR_EOC, ac97_reg_base + MCSR);
}
return IRQ_HANDLED;
@@ -304,7 +303,7 @@ static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id)
#ifdef CONFIG_PM
int pxa2xx_ac97_hw_suspend(void)
{
- GCR |= GCR_ACLINK_OFF;
+ writel(readl(ac97_reg_base + GCR) | (GCR_ACLINK_OFF), ac97_reg_base + GCR);
clk_disable_unprepare(ac97_clk);
return 0;
}
@@ -321,8 +320,15 @@ EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_resume);
int pxa2xx_ac97_hw_probe(struct platform_device *dev)
{
int ret;
+ int irq;
pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
+ ac97_reg_base = devm_platform_ioremap_resource(dev, 0);
+ if (IS_ERR(ac97_reg_base)) {
+ dev_err(&dev->dev, "Missing MMIO resource\n");
+ return PTR_ERR(ac97_reg_base);
+ }
+
if (pdata) {
switch (pdata->reset_gpio) {
case 95:
@@ -389,14 +395,20 @@ int pxa2xx_ac97_hw_probe(struct platform_device *dev)
if (ret)
goto err_clk2;
- ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, 0, "AC97", NULL);
+ irq = platform_get_irq(dev, 0);
+ if (irq < 0) {
+ ret = irq;
+ goto err_irq;
+ }
+
+ ret = request_irq(irq, pxa2xx_ac97_irq, 0, "AC97", NULL);
if (ret < 0)
goto err_irq;
return 0;
err_irq:
- GCR |= GCR_ACLINK_OFF;
+ writel(readl(ac97_reg_base + GCR) | (GCR_ACLINK_OFF), ac97_reg_base + GCR);
err_clk2:
clk_put(ac97_clk);
ac97_clk = NULL;
@@ -414,8 +426,8 @@ void pxa2xx_ac97_hw_remove(struct platform_device *dev)
{
if (cpu_is_pxa27x())
gpio_free(reset_gpio);
- GCR |= GCR_ACLINK_OFF;
- free_irq(IRQ_AC97, NULL);
+ writel(readl(ac97_reg_base + GCR) | (GCR_ACLINK_OFF), ac97_reg_base + GCR);
+ free_irq(platform_get_irq(dev, 0), NULL);
if (ac97conf_clk) {
clk_put(ac97conf_clk);
ac97conf_clk = NULL;
@@ -426,6 +438,24 @@ void pxa2xx_ac97_hw_remove(struct platform_device *dev)
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_remove);
+u32 pxa2xx_ac97_read_modr(void)
+{
+ if (!ac97_reg_base)
+ return 0;
+
+ return readl(ac97_reg_base + MODR);
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_read_modr);
+
+u32 pxa2xx_ac97_read_misr(void)
+{
+ if (!ac97_reg_base)
+ return 0;
+
+ return readl(ac97_reg_base + MISR);
+}
+EXPORT_SYMBOL_GPL(pxa2xx_ac97_read_misr);
+
MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("Intel/Marvell PXA sound library");
MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-25 22:36:04 +0000