aboutsummaryrefslogtreecommitdiffstats
path: root/sound/arm/pxa2xx-ac97-lib.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/arm/pxa2xx-ac97-lib.c')
-rw-r--r--sound/arm/pxa2xx-ac97-lib.c68
1 files changed, 6 insertions, 62 deletions
diff --git a/sound/arm/pxa2xx-ac97-lib.c b/sound/arm/pxa2xx-ac97-lib.c
index 6fdca97186e7..88eec3847df2 100644
--- a/sound/arm/pxa2xx-ac97-lib.c
+++ b/sound/arm/pxa2xx-ac97-lib.c
@@ -22,7 +22,6 @@
22 22
23#include <asm/irq.h> 23#include <asm/irq.h>
24#include <mach/regs-ac97.h> 24#include <mach/regs-ac97.h>
25#include <mach/pxa2xx-gpio.h>
26#include <mach/audio.h> 25#include <mach/audio.h>
27 26
28static DEFINE_MUTEX(car_mutex); 27static DEFINE_MUTEX(car_mutex);
@@ -32,6 +31,8 @@ static struct clk *ac97_clk;
32static struct clk *ac97conf_clk; 31static struct clk *ac97conf_clk;
33static int reset_gpio; 32static int reset_gpio;
34 33
34extern void pxa27x_assert_ac97reset(int reset_gpio, int on);
35
35/* 36/*
36 * Beware PXA27x bugs: 37 * Beware PXA27x bugs:
37 * 38 *
@@ -42,45 +43,6 @@ static int reset_gpio;
42 * 1 jiffy timeout if interrupt never comes). 43 * 1 jiffy timeout if interrupt never comes).
43 */ 44 */
44 45
45enum {
46 RESETGPIO_FORCE_HIGH,
47 RESETGPIO_FORCE_LOW,
48 RESETGPIO_NORMAL_ALTFUNC
49};
50
51/**
52 * set_resetgpio_mode - computes and sets the AC97_RESET gpio mode on PXA
53 * @mode: chosen action
54 *
55 * As the PXA27x CPUs suffer from a AC97 bug, a manual control of the reset line
56 * must be done to insure proper work of AC97 reset line. This function
57 * computes the correct gpio_mode for further use by reset functions, and
58 * applied the change through pxa_gpio_mode.
59 */
60static void set_resetgpio_mode(int resetgpio_action)
61{
62 int mode = 0;
63
64 if (reset_gpio)
65 switch (resetgpio_action) {
66 case RESETGPIO_NORMAL_ALTFUNC:
67 if (reset_gpio == 113)
68 mode = 113 | GPIO_ALT_FN_2_OUT;
69 if (reset_gpio == 95)
70 mode = 95 | GPIO_ALT_FN_1_OUT;
71 break;
72 case RESETGPIO_FORCE_LOW:
73 mode = reset_gpio | GPIO_OUT | GPIO_DFLT_LOW;
74 break;
75 case RESETGPIO_FORCE_HIGH:
76 mode = reset_gpio | GPIO_OUT | GPIO_DFLT_HIGH;
77 break;
78 };
79
80 if (mode)
81 pxa_gpio_mode(mode);
82}
83
84unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg) 46unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
85{ 47{
86 unsigned short val = -1; 48 unsigned short val = -1;
@@ -174,12 +136,11 @@ static inline void pxa_ac97_warm_pxa27x(void)
174{ 136{
175 gsr_bits = 0; 137 gsr_bits = 0;
176 138
177 /* warm reset broken on Bulverde, 139 /* warm reset broken on Bulverde, so manually keep AC97 reset high */
178 so manually keep AC97 reset high */ 140 pxa27x_assert_ac97reset(reset_gpio, 1);
179 set_resetgpio_mode(RESETGPIO_FORCE_HIGH);
180 udelay(10); 141 udelay(10);
181 GCR |= GCR_WARM_RST; 142 GCR |= GCR_WARM_RST;
182 set_resetgpio_mode(RESETGPIO_NORMAL_ALTFUNC); 143 pxa27x_assert_ac97reset(reset_gpio, 0);
183 udelay(500); 144 udelay(500);
184} 145}
185 146
@@ -345,16 +306,6 @@ EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_suspend);
345 306
346int pxa2xx_ac97_hw_resume(void) 307int pxa2xx_ac97_hw_resume(void)
347{ 308{
348 if (cpu_is_pxa25x() || cpu_is_pxa27x()) {
349 pxa_gpio_mode(GPIO31_SYNC_AC97_MD);
350 pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD);
351 pxa_gpio_mode(GPIO28_BITCLK_AC97_MD);
352 pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD);
353 }
354 if (cpu_is_pxa27x()) {
355 /* Use GPIO 113 or 95 as AC97 Reset on Bulverde */
356 set_resetgpio_mode(RESETGPIO_NORMAL_ALTFUNC);
357 }
358 clk_enable(ac97_clk); 309 clk_enable(ac97_clk);
359 return 0; 310 return 0;
360} 311}
@@ -386,16 +337,9 @@ int __devinit pxa2xx_ac97_hw_probe(struct platform_device *dev)
386 reset_gpio = 113; 337 reset_gpio = 113;
387 } 338 }
388 339
389 if (cpu_is_pxa25x() || cpu_is_pxa27x()) {
390 pxa_gpio_mode(GPIO31_SYNC_AC97_MD);
391 pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD);
392 pxa_gpio_mode(GPIO28_BITCLK_AC97_MD);
393 pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD);
394 }
395
396 if (cpu_is_pxa27x()) { 340 if (cpu_is_pxa27x()) {
397 /* Use GPIO 113 as AC97 Reset on Bulverde */ 341 /* Use GPIO 113 as AC97 Reset on Bulverde */
398 set_resetgpio_mode(RESETGPIO_NORMAL_ALTFUNC); 342 pxa27x_assert_ac97reset(reset_gpio, 0);
399 ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK"); 343 ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK");
400 if (IS_ERR(ac97conf_clk)) { 344 if (IS_ERR(ac97conf_clk)) {
401 ret = PTR_ERR(ac97conf_clk); 345 ret = PTR_ERR(ac97conf_clk);