Commit 8380222e authored by Sascha Hauer's avatar Sascha Hauer Committed by Mark Brown
Browse files

ASoC: Add a new imx-ssi sound driver 



The old driver has the number of SSI units in the system hardcoded,
does not make use of the device model and works only on i.MX21/27.

This driver replaces it. It works in DMA mode on i.MX21/27 and using
an FIQ handler on other systems. It also supports AC97 mode of
the SSI units.

Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Acked-by: default avatarJavier Martin <javier.martin@vista-silicon.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 53242c68

arch/arm/plat-mxc/Makefile

+6 −0
Original line number Diff line number Diff line
@@ -9,3 +9,9 @@ obj-$(CONFIG_ARCH_MX1) += iomux-mx1-mx2.o dma-mx1-mx2.o 
obj-$(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_ARCH_MXC_AUDMUX_V1) += audmux-v1.o

obj-$(CONFIG_ARCH_MXC_AUDMUX_V2) += audmux-v2.o

ifdef CONFIG_SND_IMX_SOC

obj-y += ssi-fiq.o

obj-y += ssi-fiq-ksym.o

endif

arch/arm/plat-mxc/ssi-fiq-ksym.c

0 → 100644
+20 −0
Original line number Diff line number Diff line 
/*

 * Exported ksyms for the SSI FIQ handler

 *

 * Copyright (C) 2009, Sascha Hauer <s.hauer@pengutronix.de>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



#include <linux/module.h>



#include <mach/ssi.h>



EXPORT_SYMBOL(imx_ssi_fiq_tx_buffer);

EXPORT_SYMBOL(imx_ssi_fiq_rx_buffer);

EXPORT_SYMBOL(imx_ssi_fiq_start);

EXPORT_SYMBOL(imx_ssi_fiq_end);

EXPORT_SYMBOL(imx_ssi_fiq_base);

arch/arm/plat-mxc/ssi-fiq.S

0 → 100644
+134 −0
Original line number Diff line number Diff line 
/*

 *  Copyright (C) 2009 Sascha Hauer <s.hauer@pengutronix.de>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



#include <linux/linkage.h>

#include <asm/assembler.h>



/*

 * r8  = bit 0-15: tx offset, bit 16-31: tx buffer size

 * r9  = bit 0-15: rx offset, bit 16-31: rx buffer size

 */



#define SSI_STX0	0x00

#define SSI_SRX0	0x08

#define SSI_SISR	0x14

#define SSI_SIER	0x18

#define SSI_SACNT	0x38



#define SSI_SACNT_AC97EN	(1 << 0)



#define SSI_SIER_TFE0_EN	(1 << 0)

#define SSI_SISR_TFE0		(1 << 0)

#define SSI_SISR_RFF0		(1 << 2)

#define SSI_SIER_RFF0_EN	(1 << 2)



		.text

		.global	imx_ssi_fiq_start

		.global	imx_ssi_fiq_end

		.global imx_ssi_fiq_base

		.global imx_ssi_fiq_rx_buffer

		.global imx_ssi_fiq_tx_buffer



imx_ssi_fiq_start:

		ldr r12, imx_ssi_fiq_base



		/* TX */

		ldr r11, imx_ssi_fiq_tx_buffer



		/* shall we send? */

		ldr r13, [r12, #SSI_SIER]

		tst r13, #SSI_SIER_TFE0_EN

		beq 1f



		/* TX FIFO empty? */

		ldr r13, [r12, #SSI_SISR]

		tst r13, #SSI_SISR_TFE0

		beq 1f



		mov r10, #0x10000

		sub r10, #1

		and r10, r10, r8	/* r10: current buffer offset */



		add r11, r11, r10



		ldrh r13, [r11]

		strh r13, [r12, #SSI_STX0]



		ldrh r13, [r11, #2]

		strh r13, [r12, #SSI_STX0]



		ldrh r13, [r11, #4]

		strh r13, [r12, #SSI_STX0]



		ldrh r13, [r11, #6]

		strh r13, [r12, #SSI_STX0]



		add r10, #8

		lsr r13, r8, #16	/* r13: buffer size */

		cmp r10, r13

		lslgt r8, r13, #16

		addle r8, #8

1:

		/* RX */



		/* shall we receive? */

		ldr r13, [r12, #SSI_SIER]

		tst r13, #SSI_SIER_RFF0_EN

		beq 1f



		/* RX FIFO full? */

		ldr r13, [r12, #SSI_SISR]

		tst r13, #SSI_SISR_RFF0

		beq 1f



		ldr r11, imx_ssi_fiq_rx_buffer



		mov r10, #0x10000

		sub r10, #1

		and r10, r10, r9	/* r10: current buffer offset */



		add r11, r11, r10



		ldr r13, [r12, #SSI_SACNT]

		tst r13, #SSI_SACNT_AC97EN



		ldr r13, [r12, #SSI_SRX0]

		strh r13, [r11]



		ldr r13, [r12, #SSI_SRX0]

		strh r13, [r11, #2]



		/* dummy read to skip slot 12 */

		ldrne r13, [r12, #SSI_SRX0]



		ldr r13, [r12, #SSI_SRX0]

		strh r13, [r11, #4]



		ldr r13, [r12, #SSI_SRX0]

		strh r13, [r11, #6]



		/* dummy read to skip slot 12 */

		ldrne r13, [r12, #SSI_SRX0]



		add r10, #8

		lsr r13, r9, #16	/* r13: buffer size */

		cmp r10, r13

		lslgt r9, r13, #16

		addle r9, #8



1:

		@ return from FIQ

		subs	pc, lr, #4

imx_ssi_fiq_base:

		.word 0x0

imx_ssi_fiq_rx_buffer:

		.word 0x0

imx_ssi_fiq_tx_buffer:

		.word 0x0

imx_ssi_fiq_end:

sound/soc/imx/Kconfig

+6 −14
Original line number Diff line number Diff line 
config SND_MX1_MX2_SOC

	tristate "SoC Audio for Freecale i.MX1x i.MX2x CPUs"

	depends on ARCH_MX2 || ARCH_MX1

config SND_IMX_SOC

	tristate "SoC Audio for Freecale i.MX CPUs"

	depends on ARCH_MXC

	select SND_PCM

	select FIQ

	select SND_SOC_AC97_BUS

	help

	  Say Y or M if you want to add support for codecs attached to

	  the MX1 or MX2 SSI interface.

	  the i.MX SSI interface.



config SND_MXC_SOC_SSI

	tristate

config SND_SOC_MX27VIS_WM8974

	tristate "SoC Audio support for MX27 - WM8974 Visstrim_sm10 board"

	depends on SND_MX1_MX2_SOC && MACH_MX27 && MACH_IMX27_VISSTRIM_M10

	select SND_MXC_SOC_SSI

	select SND_SOC_WM8974

	help

	  Say Y if you want to add support for SoC audio on Visstrim SM10

	  board with WM8974.

sound/soc/imx/Makefile

+6 −6
Original line number Diff line number Diff line 
# i.MX Platform Support

snd-soc-mx1_mx2-objs := mx1_mx2-pcm.o

snd-soc-mxc-ssi-objs := mxc-ssi.o

snd-soc-imx-objs := imx-ssi.o imx-pcm-fiq.o imx-pcm-dma-mx2.o



obj-$(CONFIG_SND_MX1_MX2_SOC) += snd-soc-mx1_mx2.o

obj-$(CONFIG_SND_MXC_SOC_SSI) += snd-soc-mxc-ssi.o

ifdef CONFIG_MACH_MX27

snd-soc-imx-objs += imx-pcm-dma-mx2.o

endif



obj-$(CONFIG_SND_IMX_SOC) += snd-soc-imx.o



# i.MX Machine Support
 
snd-soc-mx27vis-wm8974-objs := mx27vis_wm8974.o

obj-$(CONFIG_SND_SOC_MX27VIS_WM8974) += snd-soc-mx27vis-wm8974.o

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