]> git.openfabrics.org - ~shefty/rdma-dev.git/commitdiff
Merge remote-tracking branch 'asoc/topic/atmel' into asoc-next
authorMark Brown <broonie@opensource.wolfsonmicro.com>
Sun, 9 Dec 2012 15:22:02 +0000 (00:22 +0900)
committerMark Brown <broonie@opensource.wolfsonmicro.com>
Sun, 9 Dec 2012 15:22:02 +0000 (00:22 +0900)
32 files changed:
Documentation/devicetree/bindings/misc/atmel-ssc.txt [new file with mode: 0644]
Documentation/devicetree/bindings/sound/atmel-at91sam9g20ek-wm8731-audio.txt [new file with mode: 0644]
arch/arm/boot/dts/at91sam9260.dtsi
arch/arm/boot/dts/at91sam9263.dtsi
arch/arm/boot/dts/at91sam9g20ek_common.dtsi
arch/arm/boot/dts/at91sam9g45.dtsi
arch/arm/boot/dts/at91sam9x5.dtsi
arch/arm/mach-at91/at91rm9200.c
arch/arm/mach-at91/at91rm9200_devices.c
arch/arm/mach-at91/at91sam9260.c
arch/arm/mach-at91/at91sam9260_devices.c
arch/arm/mach-at91/at91sam9261.c
arch/arm/mach-at91/at91sam9261_devices.c
arch/arm/mach-at91/at91sam9263.c
arch/arm/mach-at91/at91sam9263_devices.c
arch/arm/mach-at91/at91sam9g45.c
arch/arm/mach-at91/at91sam9g45_devices.c
arch/arm/mach-at91/at91sam9rl.c
arch/arm/mach-at91/at91sam9rl_devices.c
arch/arm/mach-at91/at91sam9x5.c
arch/arm/mach-at91/board-sam9g20ek.c
drivers/misc/atmel-ssc.c
include/linux/atmel-ssc.h
sound/soc/atmel/Kconfig
sound/soc/atmel/Makefile
sound/soc/atmel/atmel-pcm-dma.c [new file with mode: 0644]
sound/soc/atmel/atmel-pcm-pdc.c [new file with mode: 0644]
sound/soc/atmel/atmel-pcm.c
sound/soc/atmel/atmel-pcm.h
sound/soc/atmel/atmel_ssc_dai.c
sound/soc/atmel/atmel_ssc_dai.h
sound/soc/atmel/sam9g20_wm8731.c

diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt
new file mode 100644 (file)
index 0000000..38e51ad
--- /dev/null
@@ -0,0 +1,15 @@
+* Atmel SSC driver.
+
+Required properties:
+- compatible: "atmel,at91rm9200-ssc" or "atmel,at91sam9g45-ssc"
+       - atmel,at91rm9200-ssc: support pdc transfer
+       - atmel,at91sam9g45-ssc: support dma transfer
+- reg: Should contain SSC registers location and length
+- interrupts: Should contain SSC interrupt
+
+Example:
+ssc0: ssc@fffbc000 {
+       compatible = "atmel,at91rm9200-ssc";
+       reg = <0xfffbc000 0x4000>;
+       interrupts = <14 4 5>;
+};
diff --git a/Documentation/devicetree/bindings/sound/atmel-at91sam9g20ek-wm8731-audio.txt b/Documentation/devicetree/bindings/sound/atmel-at91sam9g20ek-wm8731-audio.txt
new file mode 100644 (file)
index 0000000..9c5a994
--- /dev/null
@@ -0,0 +1,26 @@
+* Atmel at91sam9g20ek wm8731 audio complex
+
+Required properties:
+  - compatible: "atmel,at91sam9g20ek-wm8731-audio"
+  - atmel,model: The user-visible name of this sound complex.
+  - atmel,audio-routing: A list of the connections between audio components.
+  - atmel,ssc-controller: The phandle of the SSC controller
+  - atmel,audio-codec: The phandle of the WM8731 audio codec
+Optional properties:
+  - pinctrl-names, pinctrl-0: Please refer to pinctrl-bindings.txt
+
+Example:
+sound {
+       compatible = "atmel,at91sam9g20ek-wm8731-audio";
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_pck0_as_mck>;
+
+       atmel,model = "wm8731 @ AT91SAMG20EK";
+
+       atmel,audio-routing =
+               "Ext Spk", "LHPOUT",
+               "Int MIC", "MICIN";
+
+       atmel,ssc-controller = <&ssc0>;
+       atmel,audio-codec = <&wm8731>;
+};
index d410581a5a859901b32a49a1f037356c9f22e294..aaa42d8d4f8895233bdaddc00b3bdf69775e0379 100644 (file)
@@ -29,6 +29,7 @@
                tcb0 = &tcb0;
                tcb1 = &tcb1;
                i2c0 = &i2c0;
+               ssc0 = &ssc0;
        };
        cpus {
                cpu@0 {
                                status = "disabled";
                        };
 
+                       ssc0: ssc@fffbc000 {
+                               compatible = "atmel,at91rm9200-ssc";
+                               reg = <0xfffbc000 0x4000>;
+                               interrupts = <14 4 5>;
+                               status = "disable";
+                       };
+
                        adc0: adc@fffe0000 {
                                compatible = "atmel,at91sam9260-adc";
                                reg = <0xfffe0000 0x100>;
index 3e6e5c1abbf37184a44237e464080a52f4312e9f..3b721ee59b109500b688bebff12e098f0aaf05ce 100644 (file)
@@ -25,6 +25,8 @@
                gpio4 = &pioE;
                tcb0 = &tcb0;
                i2c0 = &i2c0;
+               ssc0 = &ssc0;
+               ssc1 = &ssc1;
        };
        cpus {
                cpu@0 {
                                status = "disabled";
                        };
 
+                       ssc0: ssc@fff98000 {
+                               compatible = "atmel,at91rm9200-ssc";
+                               reg = <0xfff98000 0x4000>;
+                               interrupts = <16 4 5>;
+                               status = "disable";
+                       };
+
+                       ssc1: ssc@fff9c000 {
+                               compatible = "atmel,at91rm9200-ssc";
+                               reg = <0xfff9c000 0x4000>;
+                               interrupts = <17 4 5>;
+                               status = "disable";
+                       };
+
                        macb0: ethernet@fffbc000 {
                                compatible = "cdns,at32ap7000-macb", "cdns,macb";
                                reg = <0xfffbc000 0x100>;
index e6391a4e6649cc3787ba14d7ed1d190b2d932964..2dcec8de759f97c31780027614f99866bb0c8a58 100644 (file)
 
        ahb {
                apb {
+                       pinctrl@fffff400 {
+                               board {
+                                       pinctrl_pck0_as_mck: pck0_as_mck {
+                                               atmel,pins =
+                                                       <2 1 0x2 0x0>;  /* PC1 periph B */
+                                       };
+
+                               };
+                       };
+
                        dbgu: serial@fffff200 {
                                status = "okay";
                        };
                                atmel,vbus-gpio = <&pioC 5 0>;
                                status = "okay";
                        };
+
+                       ssc0: ssc@fffbc000 {
+                               status = "okay";
+                               pinctrl-0 = <&pinctrl_ssc0_tx>;
+                       };
                };
 
                nand0: nand@40000000 {
                        reg = <0x50>;
                };
 
-               wm8731@1b {
+               wm8731: wm8731@1b {
                        compatible = "wm8731";
                        reg = <0x1b>;
                };
                        gpio-key,wakeup;
                };
        };
+
+       sound {
+               compatible = "atmel,at91sam9g20ek-wm8731-audio";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_pck0_as_mck>;
+
+               atmel,model = "wm8731 @ AT91SAMG20EK";
+
+               atmel,audio-routing =
+                       "Ext Spk", "LHPOUT",
+                       "Int Mic", "MICIN";
+
+               atmel,ssc-controller = <&ssc0>;
+               atmel,audio-codec = <&wm8731>;
+       };
 };
index 3add030d61f8651fcf5a0476b11423897de71560..acfa207162ff581eaaf063c4d3154a6f658ea177 100644 (file)
@@ -31,6 +31,8 @@
                tcb1 = &tcb1;
                i2c0 = &i2c0;
                i2c1 = &i2c1;
+               ssc0 = &ssc0;
+               ssc1 = &ssc1;
        };
        cpus {
                cpu@0 {
                                status = "disabled";
                        };
 
+                       ssc0: ssc@fff9c000 {
+                               compatible = "atmel,at91sam9g45-ssc";
+                               reg = <0xfff9c000 0x4000>;
+                               interrupts = <16 4 5>;
+                               status = "disable";
+                       };
+
+                       ssc1: ssc@fffa0000 {
+                               compatible = "atmel,at91sam9g45-ssc";
+                               reg = <0xfffa0000 0x4000>;
+                               interrupts = <17 4 5>;
+                               status = "disable";
+                       };
+
                        adc0: adc@fffb0000 {
                                compatible = "atmel,at91sam9260-adc";
                                reg = <0xfffb0000 0x100>;
index 03fc136421c5e31b01649c9caacdaf134bef4560..69667d0ac347f142a51c5acc704e731763ec2144 100644 (file)
@@ -30,6 +30,7 @@
                i2c0 = &i2c0;
                i2c1 = &i2c1;
                i2c2 = &i2c2;
+               ssc0 = &ssc0;
        };
        cpus {
                cpu@0 {
                                interrupts = <1 4 7>;
                        };
 
+                       ssc0: ssc@f0010000 {
+                               compatible = "atmel,at91sam9g45-ssc";
+                               reg = <0xf0010000 0x4000>;
+                               interrupts = <28 4 5>;
+                               status = "disable";
+                       };
+
                        tcb0: timer@f8008000 {
                                compatible = "atmel,at91sam9x5-tcb";
                                reg = <0xf8008000 0x100>;
index 5269825194a8a41c620ffa3da9f5a2cf5269bcb5..af47c75db513b58a88be84e52f2e681ec863908c 100644 (file)
@@ -184,9 +184,12 @@ static struct clk_lookup periph_clocks_lookups[] = {
        CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk),
        CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
        CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.2", &ssc2_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.2", &ssc2_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffd0000.ssc", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffd4000.ssc", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffd8000.ssc", &ssc2_clk),
        CLKDEV_CON_DEV_ID(NULL, "i2c-at91rm9200.0", &twi_clk),
        /* fake hclk clock */
        CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
index 3cee0e6ea7c3c126ec3b319497b01cf335f3f16a..9e76427aaec29a0065963e8633196f598bc9d2bc 100644 (file)
@@ -752,7 +752,7 @@ static struct resource ssc0_resources[] = {
 };
 
 static struct platform_device at91rm9200_ssc0_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 0,
        .dev    = {
                .dma_mask               = &ssc0_dmamask,
@@ -794,7 +794,7 @@ static struct resource ssc1_resources[] = {
 };
 
 static struct platform_device at91rm9200_ssc1_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 1,
        .dev    = {
                .dma_mask               = &ssc1_dmamask,
@@ -836,7 +836,7 @@ static struct resource ssc2_resources[] = {
 };
 
 static struct platform_device at91rm9200_ssc2_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 2,
        .dev    = {
                .dma_mask               = &ssc2_dmamask,
index f8202615f4a867f32ffe970cde12f0b6887d2375..a41eb3d23f68dc282cc51117427ea446db7b97e5 100644 (file)
@@ -210,7 +210,8 @@ static struct clk_lookup periph_clocks_lookups[] = {
        CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk),
        CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
        CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffbc000.ssc", &ssc_clk),
        CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9260.0", &twi_clk),
        CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.0", &twi_clk),
        /* more usart lookup table for DT entries */
index 414bd855fb0cb7fd1d0295012016937175d9c449..e67cfa2acbe00d05fe773630113b3331cc4661eb 100644 (file)
@@ -742,7 +742,7 @@ static struct resource ssc_resources[] = {
 };
 
 static struct platform_device at91sam9260_ssc_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 0,
        .dev    = {
                .dma_mask               = &ssc_dmamask,
index 04295c04b3e03cb99d31aa2f226908ab2a975ec4..7fcbe05833426b7b648a145b796619f4e47d7d5b 100644 (file)
@@ -174,9 +174,12 @@ static struct clk_lookup periph_clocks_lookups[] = {
        CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
        CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
        CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.2", &ssc2_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.2", &ssc2_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffbc000.ssc", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffc0000.ssc", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffc4000.ssc", &ssc2_clk),
        CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &hck0),
        CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9261.0", &twi_clk),
        CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g10.0", &twi_clk),
index cd604aad8e963c217301df7fa421637d1b0315a3..a27d9dd0faa4a99b9a07e5416c7f0cc96ee18f73 100644 (file)
@@ -706,7 +706,7 @@ static struct resource ssc0_resources[] = {
 };
 
 static struct platform_device at91sam9261_ssc0_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 0,
        .dev    = {
                .dma_mask               = &ssc0_dmamask,
@@ -748,7 +748,7 @@ static struct resource ssc1_resources[] = {
 };
 
 static struct platform_device at91sam9261_ssc1_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 1,
        .dev    = {
                .dma_mask               = &ssc1_dmamask,
@@ -790,7 +790,7 @@ static struct resource ssc2_resources[] = {
 };
 
 static struct platform_device at91sam9261_ssc2_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 2,
        .dev    = {
                .dma_mask               = &ssc2_dmamask,
index d6f9c23927c48c92202776d049a582af01b8f520..c0f4c8c1f4ed59ad31cd004a317e7f436181285c 100644 (file)
@@ -186,8 +186,10 @@ static struct clk *periph_clocks[] __initdata = {
 static struct clk_lookup periph_clocks_lookups[] = {
        /* One additional fake clock for macb_hclk */
        CLKDEV_CON_ID("hclk", &macb_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fff98000.ssc", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fff9c000.ssc", &ssc1_clk),
        CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.0", &mmc0_clk),
        CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.1", &mmc1_clk),
        CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
index 9c61e59a2104e7f0399fc0dca4ea926d7136d4f9..8215839f2d540a46db98a83eeddf4228122c75b8 100644 (file)
@@ -1199,7 +1199,7 @@ static struct resource ssc0_resources[] = {
 };
 
 static struct platform_device at91sam9263_ssc0_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 0,
        .dev    = {
                .dma_mask               = &ssc0_dmamask,
@@ -1241,7 +1241,7 @@ static struct resource ssc1_resources[] = {
 };
 
 static struct platform_device at91sam9263_ssc1_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 1,
        .dev    = {
                .dma_mask               = &ssc1_dmamask,
index 84af1b506d92a0b1e9e88c885b1d57be95fbf40b..a4282d3742bf11098fed3a8101285b94eafeddbe 100644 (file)
@@ -239,8 +239,10 @@ static struct clk_lookup periph_clocks_lookups[] = {
        CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tcb0_clk),
        CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g10.0", &twi0_clk),
        CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g10.1", &twi1_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91sam9g45_ssc.0", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91sam9g45_ssc.1", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fff9c000.ssc", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffa0000.ssc", &ssc1_clk),
        CLKDEV_CON_DEV_ID(NULL, "atmel-trng", &trng_clk),
        CLKDEV_CON_DEV_ID(NULL, "atmel_sha", &aestdessha_clk),
        CLKDEV_CON_DEV_ID(NULL, "atmel_tdes", &aestdessha_clk),
index fcd233cb33d25d68417a992c3b09fac45e63501a..d26474a97fec884e1ef0338400cbf68b00d0ceae 100644 (file)
@@ -1459,7 +1459,7 @@ static struct resource ssc0_resources[] = {
 };
 
 static struct platform_device at91sam9g45_ssc0_device = {
-       .name   = "ssc",
+       .name   = "at91sam9g45_ssc",
        .id     = 0,
        .dev    = {
                .dma_mask               = &ssc0_dmamask,
@@ -1501,7 +1501,7 @@ static struct resource ssc1_resources[] = {
 };
 
 static struct platform_device at91sam9g45_ssc1_device = {
-       .name   = "ssc",
+       .name   = "at91sam9g45_ssc",
        .id     = 1,
        .dev    = {
                .dma_mask               = &ssc1_dmamask,
index 72e908412222615134fc0530cc339348093f76be..b683fdc699f12e1a97dc3c60fdf07f9abd7a02f1 100644 (file)
@@ -184,8 +184,10 @@ static struct clk_lookup periph_clocks_lookups[] = {
        CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
        CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
        CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
-       CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffc0000.ssc", &ssc0_clk),
+       CLKDEV_CON_DEV_ID("pclk", "fffc4000.ssc", &ssc1_clk),
        CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.0", &twi0_clk),
        CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.1", &twi1_clk),
        CLKDEV_CON_ID("pioA", &pioA_clk),
index 5047bdc92adfdb79395143d973468862219d33c4..b656110e8afe6fec0a55fa15edc3084301f54409 100644 (file)
@@ -832,7 +832,7 @@ static struct resource ssc0_resources[] = {
 };
 
 static struct platform_device at91sam9rl_ssc0_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 0,
        .dev    = {
                .dma_mask               = &ssc0_dmamask,
@@ -874,7 +874,7 @@ static struct resource ssc1_resources[] = {
 };
 
 static struct platform_device at91sam9rl_ssc1_device = {
-       .name   = "ssc",
+       .name   = "at91rm9200_ssc",
        .id     = 1,
        .dev    = {
                .dma_mask               = &ssc1_dmamask,
index e5035380dcbce16e806fb460625fd73d9a3c1153..18fbbb27f97fcbb7a191867af7edaa0c2c1f4e8a 100644 (file)
@@ -231,6 +231,7 @@ static struct clk_lookup periph_clocks_lookups[] = {
        CLKDEV_CON_DEV_ID("t0_clk", "f800c000.timer", &tcb0_clk),
        CLKDEV_CON_DEV_ID("dma_clk", "ffffec00.dma-controller", &dma0_clk),
        CLKDEV_CON_DEV_ID("dma_clk", "ffffee00.dma-controller", &dma1_clk),
+       CLKDEV_CON_DEV_ID("pclk", "f0010000.ssc", &ssc_clk),
        CLKDEV_CON_DEV_ID(NULL, "f8010000.i2c", &twi0_clk),
        CLKDEV_CON_DEV_ID(NULL, "f8014000.i2c", &twi1_clk),
        CLKDEV_CON_DEV_ID(NULL, "f8018000.i2c", &twi2_clk),
index 3ab2b86a3762a67da9b808386d39c51fb8cd2544..ebdbf42c02c19db171239a3d84add8da572135af 100644 (file)
@@ -353,6 +353,16 @@ static struct i2c_board_info __initdata ek_i2c_devices[] = {
         },
 };
 
+static struct platform_device sam9g20ek_audio_device = {
+       .name   = "at91sam9g20ek-audio",
+       .id     = -1,
+};
+
+static void __init ek_add_device_audio(void)
+{
+       platform_device_register(&sam9g20ek_audio_device);
+}
+
 
 static void __init ek_board_init(void)
 {
@@ -394,6 +404,7 @@ static void __init ek_board_init(void)
        at91_set_B_periph(AT91_PIN_PC1, 0);
        /* SSC (for WM8731) */
        at91_add_device_ssc(AT91SAM9260_ID_SSC, ATMEL_SSC_TX);
+       ek_add_device_audio();
 }
 
 MACHINE_START(AT91SAM9G20EK, "Atmel AT91SAM9G20-EK")
index 5bb1877810749da2581aff03c6d7d50c18b875c3..d07a9eda7fff4a29aebc43892658b339b4ebb196 100644 (file)
@@ -18,6 +18,8 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 
+#include <linux/of.h>
+
 /* Serialize access to ssc_list and user count */
 static DEFINE_SPINLOCK(user_lock);
 static LIST_HEAD(ssc_list);
@@ -29,7 +31,13 @@ struct ssc_device *ssc_request(unsigned int ssc_num)
 
        spin_lock(&user_lock);
        list_for_each_entry(ssc, &ssc_list, list) {
-               if (ssc->pdev->id == ssc_num) {
+               if (ssc->pdev->dev.of_node) {
+                       if (of_alias_get_id(ssc->pdev->dev.of_node, "ssc")
+                               == ssc_num) {
+                               ssc_valid = 1;
+                               break;
+                       }
+               } else if (ssc->pdev->id == ssc_num) {
                        ssc_valid = 1;
                        break;
                }
@@ -68,39 +76,93 @@ void ssc_free(struct ssc_device *ssc)
 }
 EXPORT_SYMBOL(ssc_free);
 
-static int __init ssc_probe(struct platform_device *pdev)
+static struct atmel_ssc_platform_data at91rm9200_config = {
+       .use_dma = 0,
+};
+
+static struct atmel_ssc_platform_data at91sam9g45_config = {
+       .use_dma = 1,
+};
+
+static const struct platform_device_id atmel_ssc_devtypes[] = {
+       {
+               .name = "at91rm9200_ssc",
+               .driver_data = (unsigned long) &at91rm9200_config,
+       }, {
+               .name = "at91sam9g45_ssc",
+               .driver_data = (unsigned long) &at91sam9g45_config,
+       }, {
+               /* sentinel */
+       }
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id atmel_ssc_dt_ids[] = {
+       {
+               .compatible = "atmel,at91rm9200-ssc",
+               .data = &at91rm9200_config,
+       }, {
+               .compatible = "atmel,at91sam9g45-ssc",
+               .data = &at91sam9g45_config,
+       }, {
+               /* sentinel */
+       }
+};
+MODULE_DEVICE_TABLE(of, atmel_ssc_dt_ids);
+#endif
+
+static inline const struct atmel_ssc_platform_data * __init
+       atmel_ssc_get_driver_data(struct platform_device *pdev)
+{
+       if (pdev->dev.of_node) {
+               const struct of_device_id *match;
+               match = of_match_node(atmel_ssc_dt_ids, pdev->dev.of_node);
+               if (match == NULL)
+                       return NULL;
+               return match->data;
+       }
+
+       return (struct atmel_ssc_platform_data *)
+               platform_get_device_id(pdev)->driver_data;
+}
+
+static int ssc_probe(struct platform_device *pdev)
 {
-       int retval = 0;
        struct resource *regs;
        struct ssc_device *ssc;
+       const struct atmel_ssc_platform_data *plat_dat;
 
-       ssc = kzalloc(sizeof(struct ssc_device), GFP_KERNEL);
+       ssc = devm_kzalloc(&pdev->dev, sizeof(struct ssc_device), GFP_KERNEL);
        if (!ssc) {
                dev_dbg(&pdev->dev, "out of memory\n");
-               retval = -ENOMEM;
-               goto out;
+               return -ENOMEM;
        }
 
+       ssc->pdev = pdev;
+
+       plat_dat = atmel_ssc_get_driver_data(pdev);
+       if (!plat_dat)
+               return -ENODEV;
+       ssc->pdata = (struct atmel_ssc_platform_data *)plat_dat;
+
        regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!regs) {
                dev_dbg(&pdev->dev, "no mmio resource defined\n");
-               retval = -ENXIO;
-               goto out_free;
+               return -ENXIO;
        }
 
-       ssc->clk = clk_get(&pdev->dev, "pclk");
-       if (IS_ERR(ssc->clk)) {
-               dev_dbg(&pdev->dev, "no pclk clock defined\n");
-               retval = -ENXIO;
-               goto out_free;
-       }
-
-       ssc->pdev = pdev;
-       ssc->regs = ioremap(regs->start, resource_size(regs));
+       ssc->regs = devm_request_and_ioremap(&pdev->dev, regs);
        if (!ssc->regs) {
                dev_dbg(&pdev->dev, "ioremap failed\n");
-               retval = -EINVAL;
-               goto out_clk;
+               return -EINVAL;
+       }
+
+       ssc->phybase = regs->start;
+
+       ssc->clk = devm_clk_get(&pdev->dev, "pclk");
+       if (IS_ERR(ssc->clk)) {
+               dev_dbg(&pdev->dev, "no pclk clock defined\n");
+               return -ENXIO;
        }
 
        /* disable all interrupts */
@@ -112,8 +174,7 @@ static int __init ssc_probe(struct platform_device *pdev)
        ssc->irq = platform_get_irq(pdev, 0);
        if (!ssc->irq) {
                dev_dbg(&pdev->dev, "could not get irq\n");
-               retval = -ENXIO;
-               goto out_unmap;
+               return -ENXIO;
        }
 
        spin_lock(&user_lock);
@@ -125,16 +186,7 @@ static int __init ssc_probe(struct platform_device *pdev)
        dev_info(&pdev->dev, "Atmel SSC device at 0x%p (irq %d)\n",
                        ssc->regs, ssc->irq);
 
-       goto out;
-
-out_unmap:
-       iounmap(ssc->regs);
-out_clk:
-       clk_put(ssc->clk);
-out_free:
-       kfree(ssc);
-out:
-       return retval;
+       return 0;
 }
 
 static int __devexit ssc_remove(struct platform_device *pdev)
@@ -142,34 +194,23 @@ static int __devexit ssc_remove(struct platform_device *pdev)
        struct ssc_device *ssc = platform_get_drvdata(pdev);
 
        spin_lock(&user_lock);
-       iounmap(ssc->regs);
-       clk_put(ssc->clk);
        list_del(&ssc->list);
-       kfree(ssc);
        spin_unlock(&user_lock);
 
        return 0;
 }
 
 static struct platform_driver ssc_driver = {
-       .remove         = __devexit_p(ssc_remove),
        .driver         = {
                .name           = "ssc",
                .owner          = THIS_MODULE,
+               .of_match_table = of_match_ptr(atmel_ssc_dt_ids),
        },
+       .id_table       = atmel_ssc_devtypes,
+       .probe          = ssc_probe,
+       .remove         = __devexit_p(ssc_remove),
 };
-
-static int __init ssc_init(void)
-{
-       return platform_driver_probe(&ssc_driver, ssc_probe);
-}
-module_init(ssc_init);
-
-static void __exit ssc_exit(void)
-{
-       platform_driver_unregister(&ssc_driver);
-}
-module_exit(ssc_exit);
+module_platform_driver(ssc_driver);
 
 MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
 MODULE_DESCRIPTION("SSC driver for Atmel AVR32 and AT91");
index 4eb31752e2b77592e8a2fdbf3fde779d4851504d..deb0ae58b99bb3724bee4376b0a376b563c29cff 100644 (file)
@@ -5,10 +5,16 @@
 #include <linux/list.h>
 #include <linux/io.h>
 
+struct atmel_ssc_platform_data {
+       int                     use_dma;
+};
+
 struct ssc_device {
        struct list_head        list;
+       resource_size_t         phybase;
        void __iomem            *regs;
        struct platform_device  *pdev;
+       struct atmel_ssc_platform_data *pdata;
        struct clk              *clk;
        int                     user;
        int                     irq;
index 72b09cfd3dc367d4aa28826e750e27aa2ffb1885..d1b691bf8e2d918cb3e8fd97e61cce74c464cd76 100644 (file)
@@ -6,6 +6,14 @@ config SND_ATMEL_SOC
          the ATMEL SSC interface. You will also need
          to select the audio interfaces to support below.
 
+config SND_ATMEL_SOC_PDC
+       tristate
+       depends on SND_ATMEL_SOC
+
+config SND_ATMEL_SOC_DMA
+       tristate
+       depends on SND_ATMEL_SOC
+
 config SND_ATMEL_SOC_SSC
        tristate
        depends on SND_ATMEL_SOC
@@ -16,8 +24,8 @@ config SND_ATMEL_SOC_SSC
 
 config SND_AT91_SOC_SAM9G20_WM8731
        tristate "SoC Audio support for WM8731-based At91sam9g20 evaluation board"
-       depends on ATMEL_SSC && ARCH_AT91SAM9G20 && SND_ATMEL_SOC && \
-                   AT91_PROGRAMMABLE_CLOCKS
+       depends on ATMEL_SSC && SND_ATMEL_SOC && AT91_PROGRAMMABLE_CLOCKS
+       select SND_ATMEL_SOC_PDC
        select SND_ATMEL_SOC_SSC
        select SND_SOC_WM8731
        help
@@ -27,6 +35,7 @@ config SND_AT91_SOC_SAM9G20_WM8731
 config SND_AT91_SOC_AFEB9260
        tristate "SoC Audio support for AFEB9260 board"
        depends on ATMEL_SSC && ARCH_AT91 && MACH_AFEB9260 && SND_ATMEL_SOC
+       select SND_ATMEL_SOC_PDC
        select SND_ATMEL_SOC_SSC
        select SND_SOC_TLV320AIC23
        help
index a5c0bf19da78f01e823fc614c61528c30272a67c..41967ccb6f41e3968753d4922ad03f2439ad81b9 100644 (file)
@@ -1,8 +1,12 @@
 # AT91 Platform Support
 snd-soc-atmel-pcm-objs := atmel-pcm.o
+snd-soc-atmel-pcm-pdc-objs := atmel-pcm-pdc.o
+snd-soc-atmel-pcm-dma-objs := atmel-pcm-dma.o
 snd-soc-atmel_ssc_dai-objs := atmel_ssc_dai.o
 
 obj-$(CONFIG_SND_ATMEL_SOC) += snd-soc-atmel-pcm.o
+obj-$(CONFIG_SND_ATMEL_SOC_PDC) += snd-soc-atmel-pcm-pdc.o
+obj-$(CONFIG_SND_ATMEL_SOC_DMA) += snd-soc-atmel-pcm-dma.o
 obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
 
 # AT91 Machine Support
diff --git a/sound/soc/atmel/atmel-pcm-dma.c b/sound/soc/atmel/atmel-pcm-dma.c
new file mode 100644 (file)
index 0000000..30184a4
--- /dev/null
@@ -0,0 +1,240 @@
+/*
+ * atmel-pcm-dma.c  --  ALSA PCM DMA support for the Atmel SoC.
+ *
+ *  Copyright (C) 2012 Atmel
+ *
+ * Author: Bo Shen <voice.shen@atmel.com>
+ *
+ * Based on atmel-pcm by:
+ * Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ * Copyright 2008 Atmel
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/atmel-ssc.h>
+#include <linux/platform_data/dma-atmel.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "atmel-pcm.h"
+
+/*--------------------------------------------------------------------------*\
+ * Hardware definition
+\*--------------------------------------------------------------------------*/
+static const struct snd_pcm_hardware atmel_pcm_dma_hardware = {
+       .info                   = SNDRV_PCM_INFO_MMAP |
+                                 SNDRV_PCM_INFO_MMAP_VALID |
+                                 SNDRV_PCM_INFO_INTERLEAVED |
+                                 SNDRV_PCM_INFO_RESUME |
+                                 SNDRV_PCM_INFO_PAUSE,
+       .formats                = SNDRV_PCM_FMTBIT_S16_LE,
+       .period_bytes_min       = 256,          /* lighting DMA overhead */
+       .period_bytes_max       = 2 * 0xffff,   /* if 2 bytes format */
+       .periods_min            = 8,
+       .periods_max            = 1024,         /* no limit */
+       .buffer_bytes_max       = ATMEL_SSC_DMABUF_SIZE,
+};
+
+/**
+ * atmel_pcm_dma_irq: SSC interrupt handler for DMAENGINE enabled SSC
+ *
+ * We use DMAENGINE to send/receive data to/from SSC so this ISR is only to
+ * check if any overrun occured.
+ */
+static void atmel_pcm_dma_irq(u32 ssc_sr,
+       struct snd_pcm_substream *substream)
+{
+       struct atmel_pcm_dma_params *prtd;
+
+       prtd = snd_dmaengine_pcm_get_data(substream);
+
+       if (ssc_sr & prtd->mask->ssc_error) {
+               if (snd_pcm_running(substream))
+                       pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x)\n",
+                               substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+                               ? "underrun" : "overrun", prtd->name,
+                               ssc_sr);
+
+               /* stop RX and capture: will be enabled again at restart */
+               ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_disable);
+               snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
+
+               /* now drain RHR and read status to remove xrun condition */
+               ssc_readx(prtd->ssc->regs, SSC_RHR);
+               ssc_readx(prtd->ssc->regs, SSC_SR);
+       }
+}
+
+/*--------------------------------------------------------------------------*\
+ * DMAENGINE operations
+\*--------------------------------------------------------------------------*/
+static bool filter(struct dma_chan *chan, void *slave)
+{
+       struct at_dma_slave *sl = slave;
+
+       if (sl->dma_dev == chan->device->dev) {
+               chan->private = sl;
+               return true;
+       } else {
+               return false;
+       }
+}
+
+static int atmel_pcm_configure_dma(struct snd_pcm_substream *substream,
+       struct snd_pcm_hw_params *params)
+{
+       struct atmel_pcm_dma_params *prtd;
+       struct ssc_device *ssc;
+       struct dma_chan *dma_chan;
+       struct dma_slave_config slave_config;
+       int ret;
+
+       prtd = snd_dmaengine_pcm_get_data(substream);
+       ssc = prtd->ssc;
+
+       ret = snd_hwparams_to_dma_slave_config(substream, params,
+                       &slave_config);
+       if (ret) {
+               pr_err("atmel-pcm: hwparams to dma slave configure failed\n");
+               return ret;
+       }
+
+       if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+               slave_config.dst_addr = (dma_addr_t)ssc->phybase + SSC_THR;
+               slave_config.dst_maxburst = 1;
+       } else {
+               slave_config.src_addr = (dma_addr_t)ssc->phybase + SSC_RHR;
+               slave_config.src_maxburst = 1;
+       }
+
+       slave_config.device_fc = false;
+
+       dma_chan = snd_dmaengine_pcm_get_chan(substream);
+       if (dmaengine_slave_config(dma_chan, &slave_config)) {
+               pr_err("atmel-pcm: failed to configure dma channel\n");
+               ret = -EBUSY;
+               return ret;
+       }
+
+       return 0;
+}
+
+static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
+       struct snd_pcm_hw_params *params)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct atmel_pcm_dma_params *prtd;
+       struct ssc_device *ssc;
+       struct at_dma_slave *sdata = NULL;
+       int ret;
+
+       snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+       prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+       ssc = prtd->ssc;
+       if (ssc->pdev)
+               sdata = ssc->pdev->dev.platform_data;
+
+       ret = snd_dmaengine_pcm_open(substream, filter, sdata);
+       if (ret) {
+               pr_err("atmel-pcm: dmaengine pcm open failed\n");
+               return -EINVAL;
+       }
+
+       snd_dmaengine_pcm_set_data(substream, prtd);
+
+       ret = atmel_pcm_configure_dma(substream, params);
+       if (ret) {
+               pr_err("atmel-pcm: failed to configure dmai\n");
+               goto err;
+       }
+
+       prtd->dma_intr_handler = atmel_pcm_dma_irq;
+
+       return 0;
+err:
+       snd_dmaengine_pcm_close(substream);
+       return ret;
+}
+
+static int atmel_pcm_dma_prepare(struct snd_pcm_substream *substream)
+{
+       struct atmel_pcm_dma_params *prtd;
+
+       prtd = snd_dmaengine_pcm_get_data(substream);
+
+       ssc_writex(prtd->ssc->regs, SSC_IER, prtd->mask->ssc_error);
+       ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_enable);
+
+       return 0;
+}
+
+static int atmel_pcm_open(struct snd_pcm_substream *substream)
+{
+       snd_soc_set_runtime_hwparams(substream, &atmel_pcm_dma_hardware);
+
+       return 0;
+}
+
+static int atmel_pcm_close(struct snd_pcm_substream *substream)
+{
+       snd_dmaengine_pcm_close(substream);
+
+       return 0;
+}
+
+static struct snd_pcm_ops atmel_pcm_ops = {
+       .open           = atmel_pcm_open,
+       .close          = atmel_pcm_close,
+       .ioctl          = snd_pcm_lib_ioctl,
+       .hw_params      = atmel_pcm_hw_params,
+       .prepare        = atmel_pcm_dma_prepare,
+       .trigger        = snd_dmaengine_pcm_trigger,
+       .pointer        = snd_dmaengine_pcm_pointer_no_residue,
+       .mmap           = atmel_pcm_mmap,
+};
+
+static struct snd_soc_platform_driver atmel_soc_platform = {
+       .ops            = &atmel_pcm_ops,
+       .pcm_new        = atmel_pcm_new,
+       .pcm_free       = atmel_pcm_free,
+};
+
+int atmel_pcm_dma_platform_register(struct device *dev)
+{
+       return snd_soc_register_platform(dev, &atmel_soc_platform);
+}
+EXPORT_SYMBOL(atmel_pcm_dma_platform_register);
+
+void atmel_pcm_dma_platform_unregister(struct device *dev)
+{
+       snd_soc_unregister_platform(dev);
+}
+EXPORT_SYMBOL(atmel_pcm_dma_platform_unregister);
+
+MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
+MODULE_DESCRIPTION("Atmel DMA based PCM module");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/atmel-pcm-pdc.c b/sound/soc/atmel/atmel-pcm-pdc.c
new file mode 100644 (file)
index 0000000..6a293c7
--- /dev/null
@@ -0,0 +1,401 @@
+/*
+ * atmel-pcm.c  --  ALSA PCM interface for the Atmel atmel SoC.
+ *
+ *  Copyright (C) 2005 SAN People
+ *  Copyright (C) 2008 Atmel
+ *
+ * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ *
+ * Based on at91-pcm. by:
+ * Frank Mandarino <fmandarino@endrelia.com>
+ * Copyright 2006 Endrelia Technologies Inc.
+ *
+ * Based on pxa2xx-pcm.c by:
+ *
+ * Author:     Nicolas Pitre
+ * Created:    Nov 30, 2004
+ * Copyright:  (C) 2004 MontaVista Software, Inc.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/atmel_pdc.h>
+#include <linux/atmel-ssc.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "atmel-pcm.h"
+
+
+/*--------------------------------------------------------------------------*\
+ * Hardware definition
+\*--------------------------------------------------------------------------*/
+/* TODO: These values were taken from the AT91 platform driver, check
+ *      them against real values for AT32
+ */
+static const struct snd_pcm_hardware atmel_pcm_hardware = {
+       .info                   = SNDRV_PCM_INFO_MMAP |
+                                 SNDRV_PCM_INFO_MMAP_VALID |
+                                 SNDRV_PCM_INFO_INTERLEAVED |
+                                 SNDRV_PCM_INFO_PAUSE,
+       .formats                = SNDRV_PCM_FMTBIT_S16_LE,
+       .period_bytes_min       = 32,
+       .period_bytes_max       = 8192,
+       .periods_min            = 2,
+       .periods_max            = 1024,
+       .buffer_bytes_max       = ATMEL_SSC_DMABUF_SIZE,
+};
+
+
+/*--------------------------------------------------------------------------*\
+ * Data types
+\*--------------------------------------------------------------------------*/
+struct atmel_runtime_data {
+       struct atmel_pcm_dma_params *params;
+       dma_addr_t dma_buffer;          /* physical address of dma buffer */
+       dma_addr_t dma_buffer_end;      /* first address beyond DMA buffer */
+       size_t period_size;
+
+       dma_addr_t period_ptr;          /* physical address of next period */
+
+       /* PDC register save */
+       u32 pdc_xpr_save;
+       u32 pdc_xcr_save;
+       u32 pdc_xnpr_save;
+       u32 pdc_xncr_save;
+};
+
+/*--------------------------------------------------------------------------*\
+ * ISR
+\*--------------------------------------------------------------------------*/
+static void atmel_pcm_dma_irq(u32 ssc_sr,
+       struct snd_pcm_substream *substream)
+{
+       struct atmel_runtime_data *prtd = substream->runtime->private_data;
+       struct atmel_pcm_dma_params *params = prtd->params;
+       static int count;
+
+       count++;
+
+       if (ssc_sr & params->mask->ssc_endbuf) {
+               pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
+                               substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+                               ? "underrun" : "overrun",
+                               params->name, ssc_sr, count);
+
+               /* re-start the PDC */
+               ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+                          params->mask->pdc_disable);
+               prtd->period_ptr += prtd->period_size;
+               if (prtd->period_ptr >= prtd->dma_buffer_end)
+                       prtd->period_ptr = prtd->dma_buffer;
+
+               ssc_writex(params->ssc->regs, params->pdc->xpr,
+                          prtd->period_ptr);
+               ssc_writex(params->ssc->regs, params->pdc->xcr,
+                          prtd->period_size / params->pdc_xfer_size);
+               ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+                          params->mask->pdc_enable);
+       }
+
+       if (ssc_sr & params->mask->ssc_endx) {
+               /* Load the PDC next pointer and counter registers */
+               prtd->period_ptr += prtd->period_size;
+               if (prtd->period_ptr >= prtd->dma_buffer_end)
+                       prtd->period_ptr = prtd->dma_buffer;
+
+               ssc_writex(params->ssc->regs, params->pdc->xnpr,
+                          prtd->period_ptr);
+               ssc_writex(params->ssc->regs, params->pdc->xncr,
+                          prtd->period_size / params->pdc_xfer_size);
+       }
+
+       snd_pcm_period_elapsed(substream);
+}
+
+
+/*--------------------------------------------------------------------------*\
+ * PCM operations
+\*--------------------------------------------------------------------------*/
+static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
+       struct snd_pcm_hw_params *params)
+{
+       struct snd_pcm_runtime *runtime = substream->runtime;
+       struct atmel_runtime_data *prtd = runtime->private_data;
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+       /* this may get called several times by oss emulation
+        * with different params */
+
+       snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+       runtime->dma_bytes = params_buffer_bytes(params);
+
+       prtd->params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+       prtd->params->dma_intr_handler = atmel_pcm_dma_irq;
+
+       prtd->dma_buffer = runtime->dma_addr;
+       prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
+       prtd->period_size = params_period_bytes(params);
+
+       pr_debug("atmel-pcm: "
+               "hw_params: DMA for %s initialized "
+               "(dma_bytes=%u, period_size=%u)\n",
+               prtd->params->name,
+               runtime->dma_bytes,
+               prtd->period_size);
+       return 0;
+}
+
+static int atmel_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+       struct atmel_runtime_data *prtd = substream->runtime->private_data;
+       struct atmel_pcm_dma_params *params = prtd->params;
+
+       if (params != NULL) {
+               ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
+                          params->mask->pdc_disable);
+               prtd->params->dma_intr_handler = NULL;
+       }
+
+       return 0;
+}
+
+static int atmel_pcm_prepare(struct snd_pcm_substream *substream)
+{
+       struct atmel_runtime_data *prtd = substream->runtime->private_data;
+       struct atmel_pcm_dma_params *params = prtd->params;
+
+       ssc_writex(params->ssc->regs, SSC_IDR,
+                  params->mask->ssc_endx | params->mask->ssc_endbuf);
+       ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+                  params->mask->pdc_disable);
+       return 0;
+}
+
+static int atmel_pcm_trigger(struct snd_pcm_substream *substream,
+       int cmd)
+{
+       struct snd_pcm_runtime *rtd = substream->runtime;
+       struct atmel_runtime_data *prtd = rtd->private_data;
+       struct atmel_pcm_dma_params *params = prtd->params;
+       int ret = 0;
+
+       pr_debug("atmel-pcm:buffer_size = %ld,"
+               "dma_area = %p, dma_bytes = %u\n",
+               rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
+
+       switch (cmd) {
+       case SNDRV_PCM_TRIGGER_START:
+               prtd->period_ptr = prtd->dma_buffer;
+
+               ssc_writex(params->ssc->regs, params->pdc->xpr,
+                          prtd->period_ptr);
+               ssc_writex(params->ssc->regs, params->pdc->xcr,
+                          prtd->period_size / params->pdc_xfer_size);
+
+               prtd->period_ptr += prtd->period_size;
+               ssc_writex(params->ssc->regs, params->pdc->xnpr,
+                          prtd->period_ptr);
+               ssc_writex(params->ssc->regs, params->pdc->xncr,
+                          prtd->period_size / params->pdc_xfer_size);
+
+               pr_debug("atmel-pcm: trigger: "
+                       "period_ptr=%lx, xpr=%u, "
+                       "xcr=%u, xnpr=%u, xncr=%u\n",
+                       (unsigned long)prtd->period_ptr,
+                       ssc_readx(params->ssc->regs, params->pdc->xpr),
+                       ssc_readx(params->ssc->regs, params->pdc->xcr),
+                       ssc_readx(params->ssc->regs, params->pdc->xnpr),
+                       ssc_readx(params->ssc->regs, params->pdc->xncr));
+
+               ssc_writex(params->ssc->regs, SSC_IER,
+                          params->mask->ssc_endx | params->mask->ssc_endbuf);
+               ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
+                          params->mask->pdc_enable);
+
+               pr_debug("sr=%u imr=%u\n",
+                       ssc_readx(params->ssc->regs, SSC_SR),
+                       ssc_readx(params->ssc->regs, SSC_IER));
+               break;          /* SNDRV_PCM_TRIGGER_START */
+
+       case SNDRV_PCM_TRIGGER_STOP:
+       case SNDRV_PCM_TRIGGER_SUSPEND:
+       case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+               ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+                          params->mask->pdc_disable);
+               break;
+
+       case SNDRV_PCM_TRIGGER_RESUME:
+       case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+               ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+                          params->mask->pdc_enable);
+               break;
+
+       default:
+               ret = -EINVAL;
+       }
+
+       return ret;
+}
+
+static snd_pcm_uframes_t atmel_pcm_pointer(
+       struct snd_pcm_substream *substream)
+{
+       struct snd_pcm_runtime *runtime = substream->runtime;
+       struct atmel_runtime_data *prtd = runtime->private_data;
+       struct atmel_pcm_dma_params *params = prtd->params;
+       dma_addr_t ptr;
+       snd_pcm_uframes_t x;
+
+       ptr = (dma_addr_t) ssc_readx(params->ssc->regs, params->pdc->xpr);
+       x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
+
+       if (x == runtime->buffer_size)
+               x = 0;
+
+       return x;
+}
+
+static int atmel_pcm_open(struct snd_pcm_substream *substream)
+{
+       struct snd_pcm_runtime *runtime = substream->runtime;
+       struct atmel_runtime_data *prtd;
+       int ret = 0;
+
+       snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware);
+
+       /* ensure that buffer size is a multiple of period size */
+       ret = snd_pcm_hw_constraint_integer(runtime,
+                                               SNDRV_PCM_HW_PARAM_PERIODS);
+       if (ret < 0)
+               goto out;
+
+       prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL);
+       if (prtd == NULL) {
+               ret = -ENOMEM;
+               goto out;
+       }
+       runtime->private_data = prtd;
+
+ out:
+       return ret;
+}
+
+static int atmel_pcm_close(struct snd_pcm_substream *substream)
+{
+       struct atmel_runtime_data *prtd = substream->runtime->private_data;
+
+       kfree(prtd);
+       return 0;
+}
+
+static struct snd_pcm_ops atmel_pcm_ops = {
+       .open           = atmel_pcm_open,
+       .close          = atmel_pcm_close,
+       .ioctl          = snd_pcm_lib_ioctl,
+       .hw_params      = atmel_pcm_hw_params,
+       .hw_free        = atmel_pcm_hw_free,
+       .prepare        = atmel_pcm_prepare,
+       .trigger        = atmel_pcm_trigger,
+       .pointer        = atmel_pcm_pointer,
+       .mmap           = atmel_pcm_mmap,
+};
+
+
+/*--------------------------------------------------------------------------*\
+ * ASoC platform driver
+\*--------------------------------------------------------------------------*/
+#ifdef CONFIG_PM
+static int atmel_pcm_suspend(struct snd_soc_dai *dai)
+{
+       struct snd_pcm_runtime *runtime = dai->runtime;
+       struct atmel_runtime_data *prtd;
+       struct atmel_pcm_dma_params *params;
+
+       if (!runtime)
+               return 0;
+
+       prtd = runtime->private_data;
+       params = prtd->params;
+
+       /* disable the PDC and save the PDC registers */
+
+       ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable);
+
+       prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr);
+       prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr);
+       prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr);
+       prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr);
+
+       return 0;
+}
+
+static int atmel_pcm_resume(struct snd_soc_dai *dai)
+{
+       struct snd_pcm_runtime *runtime = dai->runtime;
+       struct atmel_runtime_data *prtd;
+       struct atmel_pcm_dma_params *params;
+
+       if (!runtime)
+               return 0;
+
+       prtd = runtime->private_data;
+       params = prtd->params;
+
+       /* restore the PDC registers and enable the PDC */
+       ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save);
+       ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save);
+       ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save);
+       ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save);
+
+       ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable);
+       return 0;
+}
+#else
+#define atmel_pcm_suspend      NULL
+#define atmel_pcm_resume       NULL
+#endif
+
+static struct snd_soc_platform_driver atmel_soc_platform = {
+       .ops            = &atmel_pcm_ops,
+       .pcm_new        = atmel_pcm_new,
+       .pcm_free       = atmel_pcm_free,
+       .suspend        = atmel_pcm_suspend,
+       .resume         = atmel_pcm_resume,
+};
+
+int atmel_pcm_pdc_platform_register(struct device *dev)
+{
+       return snd_soc_register_platform(dev, &atmel_soc_platform);
+}
+EXPORT_SYMBOL(atmel_pcm_pdc_platform_register);
+
+void atmel_pcm_pdc_platform_unregister(struct device *dev)
+{
+       snd_soc_unregister_platform(dev);
+}
+EXPORT_SYMBOL(atmel_pcm_pdc_platform_unregister);
+
+MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
+MODULE_DESCRIPTION("Atmel PCM module");
+MODULE_LICENSE("GPL");
index 9b84f985770ee4e09ca1d7a8ab04cbe410fda037..e99f1811300aef179a5c1d5c33dc702249175681 100644 (file)
  */
 
 #include <linux/module.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
 #include <linux/dma-mapping.h>
-#include <linux/atmel_pdc.h>
-#include <linux/atmel-ssc.h>
-
-#include <sound/core.h>
 #include <sound/pcm.h>
-#include <sound/pcm_params.h>
 #include <sound/soc.h>
-
 #include "atmel-pcm.h"
 
-
-/*--------------------------------------------------------------------------*\
- * Hardware definition
-\*--------------------------------------------------------------------------*/
-/* TODO: These values were taken from the AT91 platform driver, check
- *      them against real values for AT32
- */
-static const struct snd_pcm_hardware atmel_pcm_hardware = {
-       .info                   = SNDRV_PCM_INFO_MMAP |
-                                 SNDRV_PCM_INFO_MMAP_VALID |
-                                 SNDRV_PCM_INFO_INTERLEAVED |
-                                 SNDRV_PCM_INFO_PAUSE,
-       .formats                = SNDRV_PCM_FMTBIT_S16_LE,
-       .period_bytes_min       = 32,
-       .period_bytes_max       = 8192,
-       .periods_min            = 2,
-       .periods_max            = 1024,
-       .buffer_bytes_max       = 32 * 1024,
-};
-
-
-/*--------------------------------------------------------------------------*\
- * Data types
-\*--------------------------------------------------------------------------*/
-struct atmel_runtime_data {
-       struct atmel_pcm_dma_params *params;
-       dma_addr_t dma_buffer;          /* physical address of dma buffer */
-       dma_addr_t dma_buffer_end;      /* first address beyond DMA buffer */
-       size_t period_size;
-
-       dma_addr_t period_ptr;          /* physical address of next period */
-
-       /* PDC register save */
-       u32 pdc_xpr_save;
-       u32 pdc_xcr_save;
-       u32 pdc_xnpr_save;
-       u32 pdc_xncr_save;
-};
-
-
-/*--------------------------------------------------------------------------*\
- * Helper functions
-\*--------------------------------------------------------------------------*/
 static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
        int stream)
 {
        struct snd_pcm_substream *substream = pcm->streams[stream].substream;
        struct snd_dma_buffer *buf = &substream->dma_buffer;
-       size_t size = atmel_pcm_hardware.buffer_bytes_max;
+       size_t size = ATMEL_SSC_DMABUF_SIZE;
 
        buf->dev.type = SNDRV_DMA_TYPE_DEV;
        buf->dev.dev = pcm->card->dev;
        buf->private_data = NULL;
        buf->area = dma_alloc_coherent(pcm->card->dev, size,
-                                         &buf->addr, GFP_KERNEL);
-       pr_debug("atmel-pcm:"
-               "preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
-               (void *) buf->area,
-               (void *) buf->addr,
-               size);
+                       &buf->addr, GFP_KERNEL);
+       pr_debug("atmel-pcm: alloc dma buffer: area=%p, addr=%p, size=%d\n",
+                       (void *)buf->area, (void *)buf->addr, size);
 
        if (!buf->area)
                return -ENOMEM;
@@ -113,258 +58,19 @@ static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
        buf->bytes = size;
        return 0;
 }
-/*--------------------------------------------------------------------------*\
- * ISR
-\*--------------------------------------------------------------------------*/
-static void atmel_pcm_dma_irq(u32 ssc_sr,
-       struct snd_pcm_substream *substream)
-{
-       struct atmel_runtime_data *prtd = substream->runtime->private_data;
-       struct atmel_pcm_dma_params *params = prtd->params;
-       static int count;
-
-       count++;
-
-       if (ssc_sr & params->mask->ssc_endbuf) {
-               pr_warning("atmel-pcm: buffer %s on %s"
-                               " (SSC_SR=%#x, count=%d)\n",
-                               substream->stream == SNDRV_PCM_STREAM_PLAYBACK
-                               ? "underrun" : "overrun",
-                               params->name, ssc_sr, count);
-
-               /* re-start the PDC */
-               ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
-                          params->mask->pdc_disable);
-               prtd->period_ptr += prtd->period_size;
-               if (prtd->period_ptr >= prtd->dma_buffer_end)
-                       prtd->period_ptr = prtd->dma_buffer;
-
-               ssc_writex(params->ssc->regs, params->pdc->xpr,
-                          prtd->period_ptr);
-               ssc_writex(params->ssc->regs, params->pdc->xcr,
-                          prtd->period_size / params->pdc_xfer_size);
-               ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
-                          params->mask->pdc_enable);
-       }
-
-       if (ssc_sr & params->mask->ssc_endx) {
-               /* Load the PDC next pointer and counter registers */
-               prtd->period_ptr += prtd->period_size;
-               if (prtd->period_ptr >= prtd->dma_buffer_end)
-                       prtd->period_ptr = prtd->dma_buffer;
-
-               ssc_writex(params->ssc->regs, params->pdc->xnpr,
-                          prtd->period_ptr);
-               ssc_writex(params->ssc->regs, params->pdc->xncr,
-                          prtd->period_size / params->pdc_xfer_size);
-       }
-
-       snd_pcm_period_elapsed(substream);
-}
-
-
-/*--------------------------------------------------------------------------*\
- * PCM operations
-\*--------------------------------------------------------------------------*/
-static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
-       struct snd_pcm_hw_params *params)
-{
-       struct snd_pcm_runtime *runtime = substream->runtime;
-       struct atmel_runtime_data *prtd = runtime->private_data;
-       struct snd_soc_pcm_runtime *rtd = substream->private_data;
-
-       /* this may get called several times by oss emulation
-        * with different params */
-
-       snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
-       runtime->dma_bytes = params_buffer_bytes(params);
-
-       prtd->params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-       prtd->params->dma_intr_handler = atmel_pcm_dma_irq;
-
-       prtd->dma_buffer = runtime->dma_addr;
-       prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
-       prtd->period_size = params_period_bytes(params);
-
-       pr_debug("atmel-pcm: "
-               "hw_params: DMA for %s initialized "
-               "(dma_bytes=%u, period_size=%u)\n",
-               prtd->params->name,
-               runtime->dma_bytes,
-               prtd->period_size);
-       return 0;
-}
-
-static int atmel_pcm_hw_free(struct snd_pcm_substream *substream)
-{
-       struct atmel_runtime_data *prtd = substream->runtime->private_data;
-       struct atmel_pcm_dma_params *params = prtd->params;
-
-       if (params != NULL) {
-               ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
-                          params->mask->pdc_disable);
-               prtd->params->dma_intr_handler = NULL;
-       }
-
-       return 0;
-}
-
-static int atmel_pcm_prepare(struct snd_pcm_substream *substream)
-{
-       struct atmel_runtime_data *prtd = substream->runtime->private_data;
-       struct atmel_pcm_dma_params *params = prtd->params;
-
-       ssc_writex(params->ssc->regs, SSC_IDR,
-                  params->mask->ssc_endx | params->mask->ssc_endbuf);
-       ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
-                  params->mask->pdc_disable);
-       return 0;
-}
-
-static int atmel_pcm_trigger(struct snd_pcm_substream *substream,
-       int cmd)
-{
-       struct snd_pcm_runtime *rtd = substream->runtime;
-       struct atmel_runtime_data *prtd = rtd->private_data;
-       struct atmel_pcm_dma_params *params = prtd->params;
-       int ret = 0;
-
-       pr_debug("atmel-pcm:buffer_size = %ld,"
-               "dma_area = %p, dma_bytes = %u\n",
-               rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
-
-       switch (cmd) {
-       case SNDRV_PCM_TRIGGER_START:
-               prtd->period_ptr = prtd->dma_buffer;
-
-               ssc_writex(params->ssc->regs, params->pdc->xpr,
-                          prtd->period_ptr);
-               ssc_writex(params->ssc->regs, params->pdc->xcr,
-                          prtd->period_size / params->pdc_xfer_size);
-
-               prtd->period_ptr += prtd->period_size;
-               ssc_writex(params->ssc->regs, params->pdc->xnpr,
-                          prtd->period_ptr);
-               ssc_writex(params->ssc->regs, params->pdc->xncr,
-                          prtd->period_size / params->pdc_xfer_size);
-
-               pr_debug("atmel-pcm: trigger: "
-                       "period_ptr=%lx, xpr=%u, "
-                       "xcr=%u, xnpr=%u, xncr=%u\n",
-                       (unsigned long)prtd->period_ptr,
-                       ssc_readx(params->ssc->regs, params->pdc->xpr),
-                       ssc_readx(params->ssc->regs, params->pdc->xcr),
-                       ssc_readx(params->ssc->regs, params->pdc->xnpr),
-                       ssc_readx(params->ssc->regs, params->pdc->xncr));
-
-               ssc_writex(params->ssc->regs, SSC_IER,
-                          params->mask->ssc_endx | params->mask->ssc_endbuf);
-               ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
-                          params->mask->pdc_enable);
-
-               pr_debug("sr=%u imr=%u\n",
-                       ssc_readx(params->ssc->regs, SSC_SR),
-                       ssc_readx(params->ssc->regs, SSC_IER));
-               break;          /* SNDRV_PCM_TRIGGER_START */
-
-       case SNDRV_PCM_TRIGGER_STOP:
-       case SNDRV_PCM_TRIGGER_SUSPEND:
-       case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-               ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
-                          params->mask->pdc_disable);
-               break;
-
-       case SNDRV_PCM_TRIGGER_RESUME:
-       case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
-               ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
-                          params->mask->pdc_enable);
-               break;
-
-       default:
-               ret = -EINVAL;
-       }
 
-       return ret;
-}
-
-static snd_pcm_uframes_t atmel_pcm_pointer(
-       struct snd_pcm_substream *substream)
-{
-       struct snd_pcm_runtime *runtime = substream->runtime;
-       struct atmel_runtime_data *prtd = runtime->private_data;
-       struct atmel_pcm_dma_params *params = prtd->params;
-       dma_addr_t ptr;
-       snd_pcm_uframes_t x;
-
-       ptr = (dma_addr_t) ssc_readx(params->ssc->regs, params->pdc->xpr);
-       x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
-
-       if (x == runtime->buffer_size)
-               x = 0;
-
-       return x;
-}
-
-static int atmel_pcm_open(struct snd_pcm_substream *substream)
-{
-       struct snd_pcm_runtime *runtime = substream->runtime;
-       struct atmel_runtime_data *prtd;
-       int ret = 0;
-
-       snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware);
-
-       /* ensure that buffer size is a multiple of period size */
-       ret = snd_pcm_hw_constraint_integer(runtime,
-                                               SNDRV_PCM_HW_PARAM_PERIODS);
-       if (ret < 0)
-               goto out;
-
-       prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL);
-       if (prtd == NULL) {
-               ret = -ENOMEM;
-               goto out;
-       }
-       runtime->private_data = prtd;
-
- out:
-       return ret;
-}
-
-static int atmel_pcm_close(struct snd_pcm_substream *substream)
-{
-       struct atmel_runtime_data *prtd = substream->runtime->private_data;
-
-       kfree(prtd);
-       return 0;
-}
-
-static int atmel_pcm_mmap(struct snd_pcm_substream *substream,
+int atmel_pcm_mmap(struct snd_pcm_substream *substream,
        struct vm_area_struct *vma)
 {
        return remap_pfn_range(vma, vma->vm_start,
                       substream->dma_buffer.addr >> PAGE_SHIFT,
                       vma->vm_end - vma->vm_start, vma->vm_page_prot);
 }
+EXPORT_SYMBOL_GPL(atmel_pcm_mmap);
 
-static struct snd_pcm_ops atmel_pcm_ops = {
-       .open           = atmel_pcm_open,
-       .close          = atmel_pcm_close,
-       .ioctl          = snd_pcm_lib_ioctl,
-       .hw_params      = atmel_pcm_hw_params,
-       .hw_free        = atmel_pcm_hw_free,
-       .prepare        = atmel_pcm_prepare,
-       .trigger        = atmel_pcm_trigger,
-       .pointer        = atmel_pcm_pointer,
-       .mmap           = atmel_pcm_mmap,
-};
-
-
-/*--------------------------------------------------------------------------*\
- * ASoC platform driver
-\*--------------------------------------------------------------------------*/
 static u64 atmel_pcm_dmamask = DMA_BIT_MASK(32);
 
-static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
+int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
        struct snd_card *card = rtd->card->snd_card;
        struct snd_pcm *pcm = rtd->pcm;
@@ -376,6 +82,7 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
                card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
 
        if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
+               pr_debug("atmel-pcm: allocating PCM playback DMA buffer\n");
                ret = atmel_pcm_preallocate_dma_buffer(pcm,
                        SNDRV_PCM_STREAM_PLAYBACK);
                if (ret)
@@ -383,8 +90,7 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
        }
 
        if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
-               pr_debug("atmel-pcm:"
-                               "Allocating PCM capture DMA buffer\n");
+               pr_debug("atmel-pcm: allocating PCM capture DMA buffer\n");
                ret = atmel_pcm_preallocate_dma_buffer(pcm,
                        SNDRV_PCM_STREAM_CAPTURE);
                if (ret)
@@ -393,8 +99,9 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
  out:
        return ret;
 }
+EXPORT_SYMBOL_GPL(atmel_pcm_new);
 
-static void atmel_pcm_free_dma_buffers(struct snd_pcm *pcm)
+void atmel_pcm_free(struct snd_pcm *pcm)
 {
        struct snd_pcm_substream *substream;
        struct snd_dma_buffer *buf;
@@ -413,89 +120,5 @@ static void atmel_pcm_free_dma_buffers(struct snd_pcm *pcm)
                buf->area = NULL;
        }
 }
+EXPORT_SYMBOL_GPL(atmel_pcm_free);
 
-#ifdef CONFIG_PM
-static int atmel_pcm_suspend(struct snd_soc_dai *dai)
-{
-       struct snd_pcm_runtime *runtime = dai->runtime;
-       struct atmel_runtime_data *prtd;
-       struct atmel_pcm_dma_params *params;
-
-       if (!runtime)
-               return 0;
-
-       prtd = runtime->private_data;
-       params = prtd->params;
-
-       /* disable the PDC and save the PDC registers */
-
-       ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable);
-
-       prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr);
-       prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr);
-       prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr);
-       prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr);
-
-       return 0;
-}
-
-static int atmel_pcm_resume(struct snd_soc_dai *dai)
-{
-       struct snd_pcm_runtime *runtime = dai->runtime;
-       struct atmel_runtime_data *prtd;
-       struct atmel_pcm_dma_params *params;
-
-       if (!runtime)
-               return 0;
-
-       prtd = runtime->private_data;
-       params = prtd->params;
-
-       /* restore the PDC registers and enable the PDC */
-       ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save);
-       ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save);
-       ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save);
-       ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save);
-
-       ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable);
-       return 0;
-}
-#else
-#define atmel_pcm_suspend      NULL
-#define atmel_pcm_resume       NULL
-#endif
-
-static struct snd_soc_platform_driver atmel_soc_platform = {
-       .ops            = &atmel_pcm_ops,
-       .pcm_new        = atmel_pcm_new,
-       .pcm_free       = atmel_pcm_free_dma_buffers,
-       .suspend        = atmel_pcm_suspend,
-       .resume         = atmel_pcm_resume,
-};
-
-static int __devinit atmel_soc_platform_probe(struct platform_device *pdev)
-{
-       return snd_soc_register_platform(&pdev->dev, &atmel_soc_platform);
-}
-
-static int __devexit atmel_soc_platform_remove(struct platform_device *pdev)
-{
-       snd_soc_unregister_platform(&pdev->dev);
-       return 0;
-}
-
-static struct platform_driver atmel_pcm_driver = {
-       .driver = {
-                       .name = "atmel-pcm-audio",
-                       .owner = THIS_MODULE,
-       },
-
-       .probe = atmel_soc_platform_probe,
-       .remove = __devexit_p(atmel_soc_platform_remove),
-};
-
-module_platform_driver(atmel_pcm_driver);
-
-MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
-MODULE_DESCRIPTION("Atmel PCM module");
-MODULE_LICENSE("GPL");
index 5e0a95e643298b8f5210e7619139b48a02ae939f..bb45d20e7250aeace79a2595f5f9676349ba05d9 100644 (file)
@@ -36,6 +36,8 @@
 
 #include <linux/atmel-ssc.h>
 
+#define ATMEL_SSC_DMABUF_SIZE  (64 * 1024)
+
 /*
  * Registers and status bits that are required by the PCM driver.
  */
@@ -50,6 +52,7 @@ struct atmel_pdc_regs {
 struct atmel_ssc_mask {
        u32     ssc_enable;             /* SSC recv/trans enable */
        u32     ssc_disable;            /* SSC recv/trans disable */
+       u32     ssc_error;              /* SSC error conditions */
        u32     ssc_endx;               /* SSC ENDTX or ENDRX */
        u32     ssc_endbuf;             /* SSC TXBUFE or RXBUFF */
        u32     pdc_enable;             /* PDC recv/trans enable */
@@ -80,4 +83,35 @@ struct atmel_pcm_dma_params {
 #define ssc_readx(base, reg)            (__raw_readl((base) + (reg)))
 #define ssc_writex(base, reg, value)    __raw_writel((value), (base) + (reg))
 
+int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd);
+void atmel_pcm_free(struct snd_pcm *pcm);
+int atmel_pcm_mmap(struct snd_pcm_substream *substream,
+               struct vm_area_struct *vma);
+
+#ifdef CONFIG_SND_ATMEL_SOC_PDC
+int atmel_pcm_pdc_platform_register(struct device *dev);
+void atmel_pcm_pdc_platform_unregister(struct device *dev);
+#else
+static inline int atmel_pcm_pdc_platform_register(struct device *dev)
+{
+       return 0;
+}
+static inline void atmel_pcm_pdc_platform_unregister(struct device *dev)
+{
+}
+#endif
+
+#ifdef CONFIG_SND_ATMEL_SOC_DMA
+int atmel_pcm_dma_platform_register(struct device *dev);
+void atmel_pcm_dma_platform_unregister(struct device *dev);
+#else
+static inline int atmel_pcm_dma_platform_register(struct device *dev)
+{
+       return 0;
+}
+static inline void atmel_pcm_dma_platform_unregister(struct device *dev)
+{
+}
+#endif
+
 #endif /* _ATMEL_PCM_H */
index 354341ec0f42f1129adbaaf310366af46b866229..1c7663422054049265957743bad8c6f8678e9e17 100644 (file)
 #include "atmel_ssc_dai.h"
 
 
-#if defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
-#define NUM_SSC_DEVICES                1
-#else
 #define NUM_SSC_DEVICES                3
-#endif
 
 /*
  * SSC PDC registers required by the PCM DMA engine.
@@ -107,7 +103,6 @@ static struct atmel_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
        .pdc            = &pdc_rx_reg,
        .mask           = &ssc_rx_mask,
        } },
-#if NUM_SSC_DEVICES == 3
        {{
        .name           = "SSC1 PCM out",
        .pdc            = &pdc_tx_reg,
@@ -128,7 +123,6 @@ static struct atmel_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
        .pdc            = &pdc_rx_reg,
        .mask           = &ssc_rx_mask,
        } },
-#endif
 };
 
 
@@ -139,7 +133,6 @@ static struct atmel_ssc_info ssc_info[NUM_SSC_DEVICES] = {
        .dir_mask       = SSC_DIR_MASK_UNUSED,
        .initialized    = 0,
        },
-#if NUM_SSC_DEVICES == 3
        {
        .name           = "ssc1",
        .lock           = __SPIN_LOCK_UNLOCKED(ssc_info[1].lock),
@@ -152,7 +145,6 @@ static struct atmel_ssc_info ssc_info[NUM_SSC_DEVICES] = {
        .dir_mask       = SSC_DIR_MASK_UNUSED,
        .initialized    = 0,
        },
-#endif
 };
 
 
@@ -690,27 +682,9 @@ static int atmel_ssc_resume(struct snd_soc_dai *cpu_dai)
 static int atmel_ssc_probe(struct snd_soc_dai *dai)
 {
        struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
-       int ret = 0;
 
        snd_soc_dai_set_drvdata(dai, ssc_p);
 
-       /*
-        * Request SSC device
-        */
-       ssc_p->ssc = ssc_request(dai->id);
-       if (IS_ERR(ssc_p->ssc)) {
-               printk(KERN_ERR "ASoC: Failed to request SSC %d\n", dai->id);
-               ret = PTR_ERR(ssc_p->ssc);
-       }
-
-       return ret;
-}
-
-static int atmel_ssc_remove(struct snd_soc_dai *dai)
-{
-       struct atmel_ssc_info *ssc_p = snd_soc_dai_get_drvdata(dai);
-
-       ssc_free(ssc_p->ssc);
        return 0;
 }
 
@@ -728,30 +702,8 @@ static const struct snd_soc_dai_ops atmel_ssc_dai_ops = {
        .set_clkdiv     = atmel_ssc_set_dai_clkdiv,
 };
 
-static struct snd_soc_dai_driver atmel_ssc_dai[NUM_SSC_DEVICES] = {
-       {
-               .name = "atmel-ssc-dai.0",
-               .probe = atmel_ssc_probe,
-               .remove = atmel_ssc_remove,
-               .suspend = atmel_ssc_suspend,
-               .resume = atmel_ssc_resume,
-               .playback = {
-                       .channels_min = 1,
-                       .channels_max = 2,
-                       .rates = ATMEL_SSC_RATES,
-                       .formats = ATMEL_SSC_FORMATS,},
-               .capture = {
-                       .channels_min = 1,
-                       .channels_max = 2,
-                       .rates = ATMEL_SSC_RATES,
-                       .formats = ATMEL_SSC_FORMATS,},
-               .ops = &atmel_ssc_dai_ops,
-       },
-#if NUM_SSC_DEVICES == 3
-       {
-               .name = "atmel-ssc-dai.1",
+static struct snd_soc_dai_driver atmel_ssc_dai = {
                .probe = atmel_ssc_probe,
-               .remove = atmel_ssc_remove,
                .suspend = atmel_ssc_suspend,
                .resume = atmel_ssc_resume,
                .playback = {
@@ -765,50 +717,50 @@ static struct snd_soc_dai_driver atmel_ssc_dai[NUM_SSC_DEVICES] = {
                        .rates = ATMEL_SSC_RATES,
                        .formats = ATMEL_SSC_FORMATS,},
                .ops = &atmel_ssc_dai_ops,
-       },
-       {
-               .name = "atmel-ssc-dai.2",
-               .probe = atmel_ssc_probe,
-               .remove = atmel_ssc_remove,
-               .suspend = atmel_ssc_suspend,
-               .resume = atmel_ssc_resume,
-               .playback = {
-                       .channels_min = 1,
-                       .channels_max = 2,
-                       .rates = ATMEL_SSC_RATES,
-                       .formats = ATMEL_SSC_FORMATS,},
-               .capture = {
-                       .channels_min = 1,
-                       .channels_max = 2,
-                       .rates = ATMEL_SSC_RATES,
-                       .formats = ATMEL_SSC_FORMATS,},
-               .ops = &atmel_ssc_dai_ops,
-       },
-#endif
 };
 
-static __devinit int asoc_ssc_probe(struct platform_device *pdev)
+static int asoc_ssc_init(struct device *dev)
 {
-       BUG_ON(pdev->id < 0);
-       BUG_ON(pdev->id >= ARRAY_SIZE(atmel_ssc_dai));
-       return snd_soc_register_dai(&pdev->dev, &atmel_ssc_dai[pdev->id]);
-}
+       struct platform_device *pdev = to_platform_device(dev);
+       struct ssc_device *ssc = platform_get_drvdata(pdev);
+       int ret;
+
+       ret = snd_soc_register_dai(dev, &atmel_ssc_dai);
+       if (ret) {
+               dev_err(dev, "Could not register DAI: %d\n", ret);
+               goto err;
+       }
+
+       if (ssc->pdata->use_dma)
+               ret = atmel_pcm_dma_platform_register(dev);
+       else
+               ret = atmel_pcm_pdc_platform_register(dev);
+
+       if (ret) {
+               dev_err(dev, "Could not register PCM: %d\n", ret);
+               goto err_unregister_dai;
+       };
 
-static int __devexit asoc_ssc_remove(struct platform_device *pdev)
-{
-       snd_soc_unregister_dai(&pdev->dev);
        return 0;
+
+err_unregister_dai:
+       snd_soc_unregister_dai(dev);
+err:
+       return ret;
 }
 
-static struct platform_driver asoc_ssc_driver = {
-       .driver = {
-                       .name = "atmel-ssc-dai",
-                       .owner = THIS_MODULE,
-       },
+static void asoc_ssc_exit(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct ssc_device *ssc = platform_get_drvdata(pdev);
 
-       .probe = asoc_ssc_probe,
-       .remove = __devexit_p(asoc_ssc_remove),
-};
+       if (ssc->pdata->use_dma)
+               atmel_pcm_dma_platform_unregister(dev);
+       else
+               atmel_pcm_pdc_platform_unregister(dev);
+
+       snd_soc_unregister_dai(dev);
+}
 
 /**
  * atmel_ssc_set_audio - Allocate the specified SSC for audio use.
@@ -816,50 +768,32 @@ static struct platform_driver asoc_ssc_driver = {
 int atmel_ssc_set_audio(int ssc_id)
 {
        struct ssc_device *ssc;
-       static struct platform_device *dma_pdev;
-       struct platform_device *ssc_pdev;
        int ret;
 
-       if (ssc_id < 0 || ssc_id >= ARRAY_SIZE(atmel_ssc_dai))
-               return -EINVAL;
-
-       /* Allocate a dummy device for DMA if we don't have one already */
-       if (!dma_pdev) {
-               dma_pdev = platform_device_alloc("atmel-pcm-audio", -1);
-               if (!dma_pdev)
-                       return -ENOMEM;
-
-               ret = platform_device_add(dma_pdev);
-               if (ret < 0) {
-                       platform_device_put(dma_pdev);
-                       dma_pdev = NULL;
-                       return ret;
-               }
-       }
-
-       ssc_pdev = platform_device_alloc("atmel-ssc-dai", ssc_id);
-       if (!ssc_pdev)
-               return -ENOMEM;
-
        /* If we can grab the SSC briefly to parent the DAI device off it */
        ssc = ssc_request(ssc_id);
-       if (IS_ERR(ssc))
-               pr_warn("Unable to parent ASoC SSC DAI on SSC: %ld\n",
+       if (IS_ERR(ssc)) {
+               pr_err("Unable to parent ASoC SSC DAI on SSC: %ld\n",
                        PTR_ERR(ssc));
-       else {
-               ssc_pdev->dev.parent = &(ssc->pdev->dev);
-               ssc_free(ssc);
+               return PTR_ERR(ssc);
+       } else {
+               ssc_info[ssc_id].ssc = ssc;
        }
 
-       ret = platform_device_add(ssc_pdev);
-       if (ret < 0)
-               platform_device_put(ssc_pdev);
+       ret = asoc_ssc_init(&ssc->pdev->dev);
 
        return ret;
 }
 EXPORT_SYMBOL_GPL(atmel_ssc_set_audio);
 
-module_platform_driver(asoc_ssc_driver);
+void atmel_ssc_put_audio(int ssc_id)
+{
+       struct ssc_device *ssc = ssc_info[ssc_id].ssc;
+
+       ssc_free(ssc);
+       asoc_ssc_exit(&ssc->pdev->dev);
+}
+EXPORT_SYMBOL_GPL(atmel_ssc_put_audio);
 
 /* Module information */
 MODULE_AUTHOR("Sedji Gaouaou, sedji.gaouaou@atmel.com, www.atmel.com");
index 5d4f0f9b4d9a875eb935ec79488b76ff17073ab0..b1f08d51149526006021c7314aa4f3e15847de3d 100644 (file)
@@ -117,6 +117,7 @@ struct atmel_ssc_info {
        struct atmel_ssc_state ssc_state;
 };
 
-int atmel_ssc_set_audio(int ssc);
+int atmel_ssc_set_audio(int ssc_id);
+void atmel_ssc_put_audio(int ssc_id);
 
 #endif /* _AT91_SSC_DAI_H */
index c88351488f45c5c6adb0529a212ab257531a90fd..0744610e53dd97201d4a5e24099aa58e337b44fc 100644 (file)
@@ -38,6 +38,8 @@
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 
+#include <linux/pinctrl/consumer.h>
+
 #include <linux/atmel-ssc.h>
 
 #include <sound/core.h>
@@ -179,10 +181,10 @@ static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
 static struct snd_soc_dai_link at91sam9g20ek_dai = {
        .name = "WM8731",
        .stream_name = "WM8731 PCM",
-       .cpu_dai_name = "atmel-ssc-dai.0",
+       .cpu_dai_name = "at91rm9200_ssc.0",
        .codec_dai_name = "wm8731-hifi",
        .init = at91sam9g20ek_wm8731_init,
-       .platform_name = "atmel-pcm-audio",
+       .platform_name = "at91rm9200_ssc.0",
        .codec_name = "wm8731.0-001b",
        .ops = &at91sam9g20ek_ops,
 };
@@ -195,20 +197,31 @@ static struct snd_soc_card snd_soc_at91sam9g20ek = {
        .set_bias_level = at91sam9g20ek_set_bias_level,
 };
 
-static struct platform_device *at91sam9g20ek_snd_device;
-
-static int __init at91sam9g20ek_init(void)
+static int __devinit at91sam9g20ek_audio_probe(struct platform_device *pdev)
 {
+       struct device_node *np = pdev->dev.of_node;
+       struct device_node *codec_np, *cpu_np;
        struct clk *pllb;
+       struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
+       struct pinctrl *pinctrl;
        int ret;
 
-       if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc()))
-               return -ENODEV;
+       pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+       if (IS_ERR(pinctrl)) {
+               dev_err(&pdev->dev, "Failed to request pinctrl for mck\n");
+               return PTR_ERR(pinctrl);
+       }
+
+       if (!np) {
+               if (!(machine_is_at91sam9g20ek() ||
+                       machine_is_at91sam9g20ek_2mmc()))
+                       return -ENODEV;
+       }
 
        ret = atmel_ssc_set_audio(0);
-       if (ret != 0) {
-               pr_err("Failed to set SSC 0 for audio: %d\n", ret);
-               return ret;
+       if (ret) {
+               dev_err(&pdev->dev, "ssc channel is not valid\n");
+               return -EINVAL;
        }
 
        /*
@@ -236,45 +249,92 @@ static int __init at91sam9g20ek_init(void)
 
        clk_set_rate(mclk, MCLK_RATE);
 
-       at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
-       if (!at91sam9g20ek_snd_device) {
-               printk(KERN_ERR "ASoC: Platform device allocation failed\n");
-               ret = -ENOMEM;
-               goto err_mclk;
+       card->dev = &pdev->dev;
+
+       /* Parse device node info */
+       if (np) {
+               ret = snd_soc_of_parse_card_name(card, "atmel,model");
+               if (ret)
+                       goto err;
+
+               ret = snd_soc_of_parse_audio_routing(card,
+                       "atmel,audio-routing");
+               if (ret)
+                       goto err;
+
+               /* Parse codec info */
+               at91sam9g20ek_dai.codec_name = NULL;
+               codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
+               if (!codec_np) {
+                       dev_err(&pdev->dev, "codec info missing\n");
+                       return -EINVAL;
+               }
+               at91sam9g20ek_dai.codec_of_node = codec_np;
+
+               /* Parse dai and platform info */
+               at91sam9g20ek_dai.cpu_dai_name = NULL;
+               at91sam9g20ek_dai.platform_name = NULL;
+               cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
+               if (!cpu_np) {
+                       dev_err(&pdev->dev, "dai and pcm info missing\n");
+                       return -EINVAL;
+               }
+               at91sam9g20ek_dai.cpu_of_node = cpu_np;
+               at91sam9g20ek_dai.platform_of_node = cpu_np;
+
+               of_node_put(codec_np);
+               of_node_put(cpu_np);
        }
 
-       platform_set_drvdata(at91sam9g20ek_snd_device,
-                       &snd_soc_at91sam9g20ek);
-
-       ret = platform_device_add(at91sam9g20ek_snd_device);
+       ret = snd_soc_register_card(card);
        if (ret) {
-               printk(KERN_ERR "ASoC: Platform device allocation failed\n");
-               goto err_device_add;
+               printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
        }
 
        return ret;
 
-err_device_add:
-       platform_device_put(at91sam9g20ek_snd_device);
 err_mclk:
        clk_put(mclk);
        mclk = NULL;
 err:
+       atmel_ssc_put_audio(0);
        return ret;
 }
 
-static void __exit at91sam9g20ek_exit(void)
+static int __devexit at91sam9g20ek_audio_remove(struct platform_device *pdev)
 {
-       platform_device_unregister(at91sam9g20ek_snd_device);
-       at91sam9g20ek_snd_device = NULL;
+       struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+       atmel_ssc_put_audio(0);
+       snd_soc_unregister_card(card);
        clk_put(mclk);
        mclk = NULL;
+
+       return 0;
 }
 
-module_init(at91sam9g20ek_init);
-module_exit(at91sam9g20ek_exit);
+#ifdef CONFIG_OF
+static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
+       { .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
+       { }
+};
+MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
+#endif
+
+static struct platform_driver at91sam9g20ek_audio_driver = {
+       .driver = {
+               .name   = "at91sam9g20ek-audio",
+               .owner  = THIS_MODULE,
+               .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
+       },
+       .probe  = at91sam9g20ek_audio_probe,
+       .remove = __devexit_p(at91sam9g20ek_audio_remove),
+};
+
+module_platform_driver(at91sam9g20ek_audio_driver);
 
 /* Module information */
 MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
 MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
+MODULE_ALIAS("platform:at91sam9g20ek-audio");
 MODULE_LICENSE("GPL");