[PATCH 74/90] ARM: OMAP: N800: Update board-specific audio support

Tony Lindgren
2007-04-04T18:21:47Z

From: Jarkko Nikula <jarkko.nikula@nokia.com>

Signed-off-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
---
arch/arm/mach-omap2/board-n800-audio.c | 61 ++++++++++++++++++-------------
1 files changed, 35 insertions(+), 26 deletions(-)

diff --git a/arch/arm/mach-omap2/board-n800-audio.c b/arch/arm/mach-omap2/board-n800-audio.c
index 8e36691..fa6ab86 100644
--- a/arch/arm/mach-omap2/board-n800-audio.c
+++ b/arch/arm/mach-omap2/board-n800-audio.c
@@ -2,7 +2,7 @@
* linux/arch/arm/mach-omap2/board-n800-audio.c
*
* Copyright (C) 2006 Nokia Corporation
- * Contact: Juha Yrj?l?
+ * Contact: Juha Yrjola
* Jarkko Nikula <jarkko.nikula@nokia.com>
*
* This program is free software; you can redistribute it and/or
@@ -23,7 +23,6 @@

#include <linux/err.h>
#include <linux/clk.h>
-#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/spi/tsc2301.h>

@@ -44,47 +43,63 @@ static int enable_audio;
static int audio_ok;
static spinlock_t audio_lock;

-
/*
- * Leaving EAC pins multiplexed to EAC functionality results
- * in about 2 mA extra current leaked. The workaround is to
- * multiplex the EAC pins to protected mode (with pull-ups enabled)
+ * Leaving EAC and sys_clkout2 pins multiplexed to those subsystems results
+ * in about 2 mA extra current leak when audios are powered down. The
+ * workaround is to multiplex them to protected mode (with pull-ups enabled)
* whenever audio is not being used.
*/
-static int mux_disabled;
+static int eac_mux_disabled = 0;
+static int clkout2_mux_disabled = 0;
static u32 saved_mux[2];

static void n800_enable_eac_mux(void)
{
- if (!mux_disabled)
+ if (!eac_mux_disabled)
return;
- __raw_writel(saved_mux[0], IO_ADDRESS(0x480000e8));
__raw_writel(saved_mux[1], IO_ADDRESS(0x48000124));
- mux_disabled = 0;
+ eac_mux_disabled = 0;
}

static void n800_disable_eac_mux(void)
{
+ if (eac_mux_disabled) {
+ WARN_ON(eac_mux_disabled);
+ return;
+ }
+ saved_mux[1] = __raw_readl(IO_ADDRESS(0x48000124));
+ __raw_writel(0x1f1f1f1f, IO_ADDRESS(0x48000124));
+ eac_mux_disabled = 1;
+}
+
+static void n800_enable_clkout2_mux(void)
+{
+ if (!clkout2_mux_disabled)
+ return;
+ __raw_writel(saved_mux[0], IO_ADDRESS(0x480000e8));
+ clkout2_mux_disabled = 0;
+}
+
+static void n800_disable_clkout2_mux(void)
+{
u32 l;

- if (mux_disabled) {
- WARN_ON(mux_disabled);
+ if (clkout2_mux_disabled) {
+ WARN_ON(clkout2_mux_disabled);
return;
}
saved_mux[0] = __raw_readl(IO_ADDRESS(0x480000e8));
- saved_mux[1] = __raw_readl(IO_ADDRESS(0x48000124));
l = saved_mux[0] & ~0xff;
l |= 0x1f;
__raw_writel(l, IO_ADDRESS(0x480000e8));
- __raw_writel(0x1f1f1f1f, IO_ADDRESS(0x48000124));
- mux_disabled = 1;
+ clkout2_mux_disabled = 1;
}

static int n800_eac_enable_ext_clocks(struct device *dev)
{
BUG_ON(tsc2301_device == NULL);
n800_enable_eac_mux();
- tsc2301_enable_mclk(tsc2301_device);
+ tsc2301_mixer_enable_mclk(tsc2301_device);

return 0;
}
@@ -92,8 +107,8 @@ static int n800_eac_enable_ext_clocks(struct device *dev)
static void n800_eac_disable_ext_clocks(struct device *dev)
{
BUG_ON(tsc2301_device == NULL);
+ tsc2301_mixer_disable_mclk(tsc2301_device);
n800_disable_eac_mux();
- tsc2301_disable_mclk(tsc2301_device);
}

static int n800_audio_set_power(void *pdata, int dac, int adc)
@@ -199,20 +214,14 @@ static void n800_codec_put_clocks(struct device *dev)

static int n800_codec_enable_clock(struct device *dev)
{
- int err;
-
- err = clk_enable(sys_clkout2);
- if (err)
- return err;
- /* TODO: 'educated' guess for audio codec's PLL startup delay */
- mdelay(1);
-
- return 0;
+ n800_enable_clkout2_mux();
+ return clk_enable(sys_clkout2);
}

static void n800_codec_disable_clock(struct device *dev)
{
clk_disable(sys_clkout2);
+ n800_disable_clkout2_mux();
}

static int n800_codec_init(struct device *dev)
--
1.4.4.2