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MXC: Add a digital audio multiplexer driver

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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2009-10-29 17:12:39 +01:00
parent d8d982b1b2
commit 9eedbdf1b4
7 changed files with 192 additions and 0 deletions
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2
arch/arm/mach-mx2/Kconfig
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@ -6,11 +6,13 @@ choice
config MACH_MX21
bool "i.MX21 support"
select ARCH_MXC_AUDMUX_V1
help
This enables support for Freescale's MX2 based i.MX21 processor.
config MACH_MX27
bool "i.MX27 support"
select ARCH_MXC_AUDMUX_V1
help
This enables support for Freescale's MX2 based i.MX27 processor.

2
arch/arm/mach-mx3/Kconfig
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@ -2,11 +2,13 @@ if ARCH_MX3
config ARCH_MX31
select ARCH_HAS_RNGA
select ARCH_MXC_AUDMUX_V2
bool
config ARCH_MX35
bool
select ARCH_MXC_IOMUX_V3
select ARCH_MXC_AUDMUX_V2
comment "MX3 platforms:"

7
arch/arm/plat-mxc/Kconfig
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@ -78,4 +78,11 @@ config ARCH_HAS_RNGA
config ARCH_MXC_IOMUX_V3
bool
config ARCH_MXC_AUDMUX_V1
bool
config ARCH_MXC_AUDMUX_V2
bool
endif

2
arch/arm/plat-mxc/Makefile
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@ -10,3 +10,5 @@ obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o dma-mx1-mx2.o
obj-$(CONFIG_ARCH_MXC_IOMUX_V3) += iomux-v3.o
obj-$(CONFIG_MXC_PWM) += pwm.o
obj-$(CONFIG_MXC_ULPI) += ulpi.o
obj-$(CONFIG_ARCH_MXC_AUDMUX_V1) += audmux-v1.o
obj-$(CONFIG_ARCH_MXC_AUDMUX_V2) += audmux-v2.o

53
arch/arm/plat-mxc/audmux-v1.c Normal file
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@ -0,0 +1,53 @@
/*
* Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
*
* Initial development of this code was funded by
* Phytec Messtechnik GmbH, http://www.phytec.de
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <mach/audmux.h>
#include <mach/hardware.h>
static void __iomem *audmux_base;
#define MXC_AUDMUX_V1_PCR(x) ((x) * 4)
int mxc_audmux_v1_configure_port(unsigned int port, unsigned int pcr)
{
if (!audmux_base) {
printk("%s: not configured\n", __func__);
return -ENOSYS;
}
writel(pcr, audmux_base + MXC_AUDMUX_V1_PCR(port));
return 0;
}
EXPORT_SYMBOL_GPL(mxc_audmux_v1_configure_port);
static int mxc_audmux_v1_init(void)
{
if (cpu_is_mx27() || cpu_is_mx21())
audmux_base = IO_ADDRESS(AUDMUX_BASE_ADDR);
return 0;
}
postcore_initcall(mxc_audmux_v1_init);

74
arch/arm/plat-mxc/audmux-v2.c Normal file
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@ -0,0 +1,74 @@
/*
* Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
*
* Initial development of this code was funded by
* Phytec Messtechnik GmbH, http://www.phytec.de
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <mach/audmux.h>
#include <mach/hardware.h>
static struct clk *audmux_clk;
static void __iomem *audmux_base;
#define MXC_AUDMUX_V2_PTCR(x) ((x) * 8)
#define MXC_AUDMUX_V2_PDCR(x) ((x) * 8 + 4)
int mxc_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,
unsigned int pdcr)
{
if (!audmux_base)
return -ENOSYS;
if (audmux_clk)
clk_enable(audmux_clk);
writel(ptcr, audmux_base + MXC_AUDMUX_V2_PTCR(port));
writel(pdcr, audmux_base + MXC_AUDMUX_V2_PDCR(port));
if (audmux_clk)
clk_disable(audmux_clk);
return 0;
}
EXPORT_SYMBOL_GPL(mxc_audmux_v2_configure_port);
static int mxc_audmux_v2_init(void)
{
int ret;
if (cpu_is_mx35()) {
audmux_clk = clk_get(NULL, "audmux");
if (IS_ERR(audmux_clk)) {
ret = PTR_ERR(audmux_clk);
printk(KERN_ERR "%s: cannot get clock: %d\n", __func__,
ret);
return ret;
}
}
if (cpu_is_mx31() || cpu_is_mx35())
audmux_base = IO_ADDRESS(AUDMUX_BASE_ADDR);
return 0;
}
postcore_initcall(mxc_audmux_v2_init);

52
arch/arm/plat-mxc/include/mach/audmux.h Normal file
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@ -0,0 +1,52 @@
#ifndef __MACH_AUDMUX_H
#define __MACH_AUDMUX_H
#define MX27_AUDMUX_HPCR1_SSI0 0
#define MX27_AUDMUX_HPCR2_SSI1 1
#define MX27_AUDMUX_HPCR3_SSI_PINS_4 2
#define MX27_AUDMUX_PPCR1_SSI_PINS_1 3
#define MX27_AUDMUX_PPCR2_SSI_PINS_2 4
#define MX27_AUDMUX_PPCR3_SSI_PINS_3 5
#define MX31_AUDMUX_PORT1_SSI0 0
#define MX31_AUDMUX_PORT2_SSI1 1
#define MX31_AUDMUX_PORT3_SSI_PINS_3 2
#define MX31_AUDMUX_PORT4_SSI_PINS_4 3
#define MX31_AUDMUX_PORT5_SSI_PINS_5 4
#define MX31_AUDMUX_PORT6_SSI_PINS_6 5
/* Register definitions for the i.MX21/27 Digital Audio Multiplexer */
#define MXC_AUDMUX_V1_PCR_INMMASK(x) ((x) & 0xff)
#define MXC_AUDMUX_V1_PCR_INMEN (1 << 8)
#define MXC_AUDMUX_V1_PCR_TXRXEN (1 << 10)
#define MXC_AUDMUX_V1_PCR_SYN (1 << 12)
#define MXC_AUDMUX_V1_PCR_RXDSEL(x) (((x) & 0x7) << 13)
#define MXC_AUDMUX_V1_PCR_RFCSEL(x) (((x) & 0xf) << 20)
#define MXC_AUDMUX_V1_PCR_RCLKDIR (1 << 24)
#define MXC_AUDMUX_V1_PCR_RFSDIR (1 << 25)
#define MXC_AUDMUX_V1_PCR_TFCSEL(x) (((x) & 0xf) << 26)
#define MXC_AUDMUX_V1_PCR_TCLKDIR (1 << 30)
#define MXC_AUDMUX_V1_PCR_TFSDIR (1 << 31)
/* Register definitions for the i.MX25/31/35 Digital Audio Multiplexer */
#define MXC_AUDMUX_V2_PTCR_TFSDIR (1 << 31)
#define MXC_AUDMUX_V2_PTCR_TFSEL(x) (((x) & 0xf) << 27)
#define MXC_AUDMUX_V2_PTCR_TCLKDIR (1 << 26)
#define MXC_AUDMUX_V2_PTCR_TCSEL(x) (((x) & 0xf) << 22)
#define MXC_AUDMUX_V2_PTCR_RFSDIR (1 << 21)
#define MXC_AUDMUX_V2_PTCR_RFSEL(x) (((x) & 0xf) << 17)
#define MXC_AUDMUX_V2_PTCR_RCLKDIR (1 << 16)
#define MXC_AUDMUX_V2_PTCR_RCSEL(x) (((x) & 0xf) << 12)
#define MXC_AUDMUX_V2_PTCR_SYN (1 << 11)
#define MXC_AUDMUX_V2_PDCR_RXDSEL(x) (((x) & 0x7) << 13)
#define MXC_AUDMUX_V2_PDCR_TXRXEN (1 << 12)
#define MXC_AUDMUX_V2_PDCR_MODE(x) (((x) & 0x3) << 8)
#define MXC_AUDMUX_V2_PDCR_INMMASK(x) ((x) & 0xff)
int mxc_audmux_v1_configure_port(unsigned int port, unsigned int pcr);
int mxc_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,
unsigned int pdcr);
#endif /* __MACH_AUDMUX_H */