ASoC: pxa: ac97: use normal MMIO accessors

To avoid dereferencing hardwired constant pointers from a global header
file, change the driver to use devm_platform_ioremap_resource for getting
an __iomem pointer, and then using readl/writel on that.

Each pointer dereference gets changed by a search&replace, which leads
to a few overlong lines, but seems less risky than trying to clean up
the code at the same time.

Cc: alsa-devel@alsa-project.org
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2019-09-18 10:52:31 +02:00
parent 4d2dba6b6e
commit 8ff064521f
3 changed files with 92 additions and 75 deletions

View File

@ -21,15 +21,17 @@
#include <sound/pxa2xx-lib.h>
#include <mach/regs-ac97.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);
static volatile long gsr_bits;
static struct clk *ac97_clk;
static struct clk *ac97conf_clk;
static int reset_gpio;
static void __iomem *ac97_reg_base;
extern void pxa27x_configure_ac97reset(int reset_gpio, bool to_gpio);
@ -46,7 +48,7 @@ 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;
@ -55,31 +57,33 @@ int pxa2xx_ac97_read(int slot, unsigned short reg)
/* 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)) {
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);
__func__, reg, readl(ac97_reg_base + GSR) | gsr_bits);
val = -ETIMEDOUT;
goto out;
}
/* 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);
wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE, 1);
out: mutex_unlock(&car_mutex);
return val;
@ -88,25 +92,27 @@ 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);
/* 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;
}
@ -120,17 +126,17 @@ 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
@ -142,15 +148,15 @@ 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;
@ -158,7 +164,7 @@ 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
@ -168,26 +174,26 @@ 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
@ -213,10 +219,10 @@ 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);
@ -250,10 +256,10 @@ 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);
@ -268,8 +274,10 @@ 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);
@ -277,9 +285,9 @@ 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);
@ -287,9 +295,9 @@ 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;
@ -301,7 +309,7 @@ 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;
}
@ -321,6 +329,12 @@ int pxa2xx_ac97_hw_probe(struct platform_device *dev)
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:
@ -398,7 +412,7 @@ int pxa2xx_ac97_hw_probe(struct platform_device *dev)
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;
@ -416,7 +430,7 @@ void pxa2xx_ac97_hw_remove(struct platform_device *dev)
{
if (cpu_is_pxa27x())
gpio_free(reset_gpio);
GCR |= GCR_ACLINK_OFF;
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);
@ -430,13 +444,19 @@ EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_remove);
u32 pxa2xx_ac97_read_modr(void)
{
return MODR;
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)
{
return MISR;
if (!ac97_reg_base)
return 0;
return readl(ac97_reg_base + MISR);
}
EXPORT_SYMBOL_GPL(pxa2xx_ac97_read_misr);

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@ -2,25 +2,23 @@
#ifndef __ASM_ARCH_REGS_AC97_H
#define __ASM_ARCH_REGS_AC97_H
#include "pxa-regs.h"
/*
* AC97 Controller registers
*/
#define POCR __REG(0x40500000) /* PCM Out Control Register */
#define POCR (0x0000) /* PCM Out Control Register */
#define POCR_FEIE (1 << 3) /* FIFO Error Interrupt Enable */
#define POCR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
#define PICR __REG(0x40500004) /* PCM In Control Register */
#define PICR (0x0004) /* PCM In Control Register */
#define PICR_FEIE (1 << 3) /* FIFO Error Interrupt Enable */
#define PICR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
#define MCCR __REG(0x40500008) /* Mic In Control Register */
#define MCCR (0x0008) /* Mic In Control Register */
#define MCCR_FEIE (1 << 3) /* FIFO Error Interrupt Enable */
#define MCCR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
#define GCR __REG(0x4050000C) /* Global Control Register */
#define GCR (0x000C) /* Global Control Register */
#ifdef CONFIG_PXA3xx
#define GCR_CLKBPB (1 << 31) /* Internal clock enable */
#endif
@ -36,21 +34,21 @@
#define GCR_COLD_RST (1 << 1) /* AC'97 Cold Reset (0 = active) */
#define GCR_GIE (1 << 0) /* Codec GPI Interrupt Enable */
#define POSR __REG(0x40500010) /* PCM Out Status Register */
#define POSR (0x0010) /* PCM Out Status Register */
#define POSR_FIFOE (1 << 4) /* FIFO error */
#define POSR_FSR (1 << 2) /* FIFO Service Request */
#define PISR __REG(0x40500014) /* PCM In Status Register */
#define PISR (0x0014) /* PCM In Status Register */
#define PISR_FIFOE (1 << 4) /* FIFO error */
#define PISR_EOC (1 << 3) /* DMA End-of-Chain (exclusive clear) */
#define PISR_FSR (1 << 2) /* FIFO Service Request */
#define MCSR __REG(0x40500018) /* Mic In Status Register */
#define MCSR (0x0018) /* Mic In Status Register */
#define MCSR_FIFOE (1 << 4) /* FIFO error */
#define MCSR_EOC (1 << 3) /* DMA End-of-Chain (exclusive clear) */
#define MCSR_FSR (1 << 2) /* FIFO Service Request */
#define GSR __REG(0x4050001C) /* Global Status Register */
#define GSR (0x001C) /* Global Status Register */
#define GSR_CDONE (1 << 19) /* Command Done */
#define GSR_SDONE (1 << 18) /* Status Done */
#define GSR_RDCS (1 << 15) /* Read Completion Status */
@ -69,34 +67,34 @@
#define GSR_MIINT (1 << 1) /* Modem In Interrupt */
#define GSR_GSCI (1 << 0) /* Codec GPI Status Change Interrupt */
#define CAR __REG(0x40500020) /* CODEC Access Register */
#define CAR (0x0020) /* CODEC Access Register */
#define CAR_CAIP (1 << 0) /* Codec Access In Progress */
#define PCDR __REG(0x40500040) /* PCM FIFO Data Register */
#define MCDR __REG(0x40500060) /* Mic-in FIFO Data Register */
#define PCDR (0x0040) /* PCM FIFO Data Register */
#define MCDR (0x0060) /* Mic-in FIFO Data Register */
#define MOCR __REG(0x40500100) /* Modem Out Control Register */
#define MOCR (0x0100) /* Modem Out Control Register */
#define MOCR_FEIE (1 << 3) /* FIFO Error */
#define MOCR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
#define MICR __REG(0x40500108) /* Modem In Control Register */
#define MICR (0x0108) /* Modem In Control Register */
#define MICR_FEIE (1 << 3) /* FIFO Error */
#define MICR_FSRIE (1 << 1) /* FIFO Service Request Interrupt Enable */
#define MOSR __REG(0x40500110) /* Modem Out Status Register */
#define MOSR (0x0110) /* Modem Out Status Register */
#define MOSR_FIFOE (1 << 4) /* FIFO error */
#define MOSR_FSR (1 << 2) /* FIFO Service Request */
#define MISR __REG(0x40500118) /* Modem In Status Register */
#define MISR (0x0118) /* Modem In Status Register */
#define MISR_FIFOE (1 << 4) /* FIFO error */
#define MISR_EOC (1 << 3) /* DMA End-of-Chain (exclusive clear) */
#define MISR_FSR (1 << 2) /* FIFO Service Request */
#define MODR __REG(0x40500140) /* Modem FIFO Data Register */
#define MODR (0x0140) /* Modem FIFO Data Register */
#define PAC_REG_BASE __REG(0x40500200) /* Primary Audio Codec */
#define SAC_REG_BASE __REG(0x40500300) /* Secondary Audio Codec */
#define PMC_REG_BASE __REG(0x40500400) /* Primary Modem Codec */
#define SMC_REG_BASE __REG(0x40500500) /* Secondary Modem Codec */
#define PAC_REG_BASE (0x0200) /* Primary Audio Codec */
#define SAC_REG_BASE (0x0300) /* Secondary Audio Codec */
#define PMC_REG_BASE (0x0400) /* Primary Modem Codec */
#define SMC_REG_BASE (0x0500) /* Secondary Modem Codec */
#endif /* __ASM_ARCH_REGS_AC97_H */

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@ -21,7 +21,6 @@
#include <sound/pxa2xx-lib.h>
#include <sound/dmaengine_pcm.h>
#include <mach/regs-ac97.h>
#include <linux/platform_data/asoc-pxa.h>
static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)