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-rw-r--r--sound/arm/pxa2xx-ac97-lib.c50
1 files changed, 6 insertions, 44 deletions
diff --git a/sound/arm/pxa2xx-ac97-lib.c b/sound/arm/pxa2xx-ac97-lib.c
index 7587a748ea06..ee687283b6a1 100644
--- a/sound/arm/pxa2xx-ac97-lib.c
+++ b/sound/arm/pxa2xx-ac97-lib.c
@@ -32,6 +32,8 @@ static struct clk *ac97_clk;
32static struct clk *ac97conf_clk; 32static struct clk *ac97conf_clk;
33static int reset_gpio; 33static int reset_gpio;
34 34
35extern void pxa27x_assert_ac97reset(int reset_gpio, int on);
36
35/* 37/*
36 * Beware PXA27x bugs: 38 * Beware PXA27x bugs:
37 * 39 *
@@ -42,45 +44,6 @@ static int reset_gpio;
42 * 1 jiffy timeout if interrupt never comes). 44 * 1 jiffy timeout if interrupt never comes).
43 */ 45 */
44 46
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) 47unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
85{ 48{
86 unsigned short val = -1; 49 unsigned short val = -1;
@@ -174,12 +137,11 @@ static inline void pxa_ac97_warm_pxa27x(void)
174{ 137{
175 gsr_bits = 0; 138 gsr_bits = 0;
176 139
177 /* warm reset broken on Bulverde, 140 /* warm reset broken on Bulverde, so manually keep AC97 reset high */
178 so manually keep AC97 reset high */ 141 pxa27x_assert_ac97reset(reset_gpio, 1);
179 set_resetgpio_mode(RESETGPIO_FORCE_HIGH);
180 udelay(10); 142 udelay(10);
181 GCR |= GCR_WARM_RST; 143 GCR |= GCR_WARM_RST;
182 set_resetgpio_mode(RESETGPIO_NORMAL_ALTFUNC); 144 pxa27x_assert_ac97reset(reset_gpio, 0);
183 udelay(500); 145 udelay(500);
184} 146}
185 147
@@ -385,7 +347,7 @@ int __devinit pxa2xx_ac97_hw_probe(struct platform_device *dev)
385 347
386 if (cpu_is_pxa27x()) { 348 if (cpu_is_pxa27x()) {
387 /* Use GPIO 113 as AC97 Reset on Bulverde */ 349 /* Use GPIO 113 as AC97 Reset on Bulverde */
388 set_resetgpio_mode(RESETGPIO_NORMAL_ALTFUNC); 350 pxa27x_assert_ac97reset(reset_gpio, 0);
389 ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK"); 351 ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK");
390 if (IS_ERR(ac97conf_clk)) { 352 if (IS_ERR(ac97conf_clk)) {
391 ret = PTR_ERR(ac97conf_clk); 353 ret = PTR_ERR(ac97conf_clk);