From fb1bf8cd13bfa7ed0364ab0d82f717fc020d35f6 Mon Sep 17 00:00:00 2001 From: Eric Miao Date: Mon, 4 Jan 2010 16:30:58 +0800 Subject: [PATCH] [ARM] pxa: introduce processor specific pxa27x_assert_ac97reset() This is really pxa27x specific and should be kept in pxa27x.c. With this newly introduced function, the original set_resetgpio_mode() is deprecated. Cc: Dmitry Eremin-Solenikov Cc: Mark Brown Signed-off-by: Eric Miao --- arch/arm/mach-pxa/pxa27x.c | 19 ++++++++++++++ sound/arm/pxa2xx-ac97-lib.c | 50 +++++-------------------------------- 2 files changed, 25 insertions(+), 44 deletions(-) diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c index 6a0b73167e0..7c53543ba2d 100644 --- a/arch/arm/mach-pxa/pxa27x.c +++ b/arch/arm/mach-pxa/pxa27x.c @@ -40,6 +40,25 @@ void pxa27x_clear_otgph(void) } EXPORT_SYMBOL(pxa27x_clear_otgph); +static unsigned long ac97_reset_config[] = { + GPIO95_AC97_nRESET, + GPIO95_GPIO, + GPIO113_AC97_nRESET, + GPIO113_GPIO, +}; + +void pxa27x_assert_ac97reset(int reset_gpio, int on) +{ + if (reset_gpio == 113) + pxa2xx_mfp_config(on ? &ac97_reset_config[0] : + &ac97_reset_config[1], 1); + + if (reset_gpio == 95) + pxa2xx_mfp_config(on ? &ac97_reset_config[2] : + &ac97_reset_config[3], 1); +} +EXPORT_SYMBOL_GPL(pxa27x_assert_ac97reset); + /* Crystal clock: 13MHz */ #define BASE_CLK 13000000 diff --git a/sound/arm/pxa2xx-ac97-lib.c b/sound/arm/pxa2xx-ac97-lib.c index 7587a748ea0..ee687283b6a 100644 --- a/sound/arm/pxa2xx-ac97-lib.c +++ b/sound/arm/pxa2xx-ac97-lib.c @@ -32,6 +32,8 @@ 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: * @@ -42,45 +44,6 @@ static int reset_gpio; * 1 jiffy timeout if interrupt never comes). */ -enum { - RESETGPIO_FORCE_HIGH, - RESETGPIO_FORCE_LOW, - RESETGPIO_NORMAL_ALTFUNC -}; - -/** - * set_resetgpio_mode - computes and sets the AC97_RESET gpio mode on PXA - * @mode: chosen action - * - * As the PXA27x CPUs suffer from a AC97 bug, a manual control of the reset line - * must be done to insure proper work of AC97 reset line. This function - * computes the correct gpio_mode for further use by reset functions, and - * applied the change through pxa_gpio_mode. - */ -static void set_resetgpio_mode(int resetgpio_action) -{ - int mode = 0; - - if (reset_gpio) - switch (resetgpio_action) { - case RESETGPIO_NORMAL_ALTFUNC: - if (reset_gpio == 113) - mode = 113 | GPIO_ALT_FN_2_OUT; - if (reset_gpio == 95) - mode = 95 | GPIO_ALT_FN_1_OUT; - break; - case RESETGPIO_FORCE_LOW: - mode = reset_gpio | GPIO_OUT | GPIO_DFLT_LOW; - break; - case RESETGPIO_FORCE_HIGH: - mode = reset_gpio | GPIO_OUT | GPIO_DFLT_HIGH; - break; - }; - - if (mode) - pxa_gpio_mode(mode); -} - unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg) { unsigned short val = -1; @@ -174,12 +137,11 @@ static inline void pxa_ac97_warm_pxa27x(void) { gsr_bits = 0; - /* warm reset broken on Bulverde, - so manually keep AC97 reset high */ - set_resetgpio_mode(RESETGPIO_FORCE_HIGH); + /* warm reset broken on Bulverde, so manually keep AC97 reset high */ + pxa27x_assert_ac97reset(reset_gpio, 1); udelay(10); GCR |= GCR_WARM_RST; - set_resetgpio_mode(RESETGPIO_NORMAL_ALTFUNC); + pxa27x_assert_ac97reset(reset_gpio, 0); udelay(500); } @@ -385,7 +347,7 @@ int __devinit pxa2xx_ac97_hw_probe(struct platform_device *dev) if (cpu_is_pxa27x()) { /* Use GPIO 113 as AC97 Reset on Bulverde */ - set_resetgpio_mode(RESETGPIO_NORMAL_ALTFUNC); + pxa27x_assert_ac97reset(reset_gpio, 0); ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK"); if (IS_ERR(ac97conf_clk)) { ret = PTR_ERR(ac97conf_clk);