ASoC: wm0010: Add initial wm0010 DSP driver

The WM0010 is a compact digital signal processor that has been
highly optimised for low-power audio applications.  Extensive memory
resources and core optimisation allow the device to manage all audio
processing algorithms efficiently and autonomously, while the host
processor sleeps or performs other tasks.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/wm0010.h

@@ -0,0 +1,27 @@
+/*
+ * wm0010.h -- Platform data for WM0010 DSP Driver
+ *
+ * Copyright 2012 Wolfson Microelectronics PLC.
+ *
+ * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
+ *
+ * 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.
+ */
+
+#ifndef WM0010_PDATA_H
+#define WM0010_PDATA_H
+
+struct wm0010_pdata {
+	int gpio_reset;
+
+	/* Set if there is an inverter between the GPIO controlling
+	 * the reset signal and the device.
+	 */
+	int reset_active_high;
+	int irq_flags;
+};
+
+#endif

sound/soc/codecs/Kconfig

@@ -70,6 +70,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_UDA134X
 	select SND_SOC_UDA1380 if I2C
 	select SND_SOC_WL1273 if MFD_WL1273_CORE
+	select SND_SOC_WM0010 if SPI_MASTER
 	select SND_SOC_WM1250_EV1 if I2C
 	select SND_SOC_WM2000 if I2C
 	select SND_SOC_WM2200 if I2C
@@ -326,6 +327,9 @@ config SND_SOC_UDA1380
 config SND_SOC_WL1273
 	tristate
 
+config SND_SOC_WM0010
+	tristate
+
 config SND_SOC_WM1250_EV1
 	tristate
 

sound/soc/codecs/Makefile

@@ -61,6 +61,7 @@ snd-soc-twl6040-objs := twl6040.o
 snd-soc-uda134x-objs := uda134x.o
 snd-soc-uda1380-objs := uda1380.o
 snd-soc-wl1273-objs := wl1273.o
+snd-soc-wm0010-objs := wm0010.o
 snd-soc-wm1250-ev1-objs := wm1250-ev1.o
 snd-soc-wm2000-objs := wm2000.o
 snd-soc-wm2200-objs := wm2200.o
@@ -177,6 +178,7 @@ obj-$(CONFIG_SND_SOC_TWL6040)	+= snd-soc-twl6040.o
 obj-$(CONFIG_SND_SOC_UDA134X)	+= snd-soc-uda134x.o
 obj-$(CONFIG_SND_SOC_UDA1380)	+= snd-soc-uda1380.o
 obj-$(CONFIG_SND_SOC_WL1273)	+= snd-soc-wl1273.o
+obj-$(CONFIG_SND_SOC_WM0010)	+= snd-soc-wm0010.o
 obj-$(CONFIG_SND_SOC_WM1250_EV1) += snd-soc-wm1250-ev1.o
 obj-$(CONFIG_SND_SOC_WM2000)	+= snd-soc-wm2000.o
 obj-$(CONFIG_SND_SOC_WM2200)	+= snd-soc-wm2200.o

sound/soc/codecs/wm0010.c

@@ -0,0 +1,930 @@
+/*
+ * wm0010.c  --  WM0010 DSP Driver
+ *
+ * Copyright 2012 Wolfson Microelectronics PLC.
+ *
+ * Authors: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *          Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
+ *          Scott Ling <sl@opensource.wolfsonmicro.com>
+ *
+ * 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 <linux/moduleparam.h>
+#include <linux/irqreturn.h>
+#include <linux/init.h>
+#include <linux/spi/spi.h>
+#include <linux/firmware.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/gpio.h>
+#include <linux/regulator/consumer.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+
+#include <sound/soc.h>
+#include <sound/wm0010.h>
+
+#define DEVICE_ID_WM0010	10
+
+enum dfw_cmd {
+	DFW_CMD_FUSE = 0x01,
+	DFW_CMD_CODE_HDR,
+	DFW_CMD_CODE_DATA,
+	DFW_CMD_PLL,
+	DFW_CMD_INFO = 0xff
+};
+
+struct dfw_binrec {
+	u8 command;
+	u32 length:24;
+	u32 address;
+	uint8_t data[0];
+} __packed;
+
+struct dfw_pllrec {
+	u8 command;
+	u32 length:24;
+	u32 address;
+	u32 clkctrl1;
+	u32 clkctrl2;
+	u32 clkctrl3;
+	u32 ldetctrl;
+	u32 uart_div;
+	u32 spi_div;
+} __packed;
+
+static struct pll_clock_map {
+	int max_sysclk;
+	int max_pll_spi_speed;
+	u32 pll_clkctrl1;
+} pll_clock_map[] = {			   /* Dividers */
+	{ 22000000, 26000000, 0x00201f11 }, /* 2,32,2  */
+	{ 18000000, 26000000, 0x00203f21 }, /* 2,64,4  */
+	{ 14000000, 26000000, 0x00202620 }, /* 1,39,4  */
+	{ 10000000, 22000000, 0x00203120 }, /* 1,50,4  */
+	{  6500000, 22000000, 0x00204520 }, /* 1,70,4  */
+	{  5500000, 22000000, 0x00103f10 }, /* 1,64,2  */
+};
+
+enum wm0010_state {
+	WM0010_POWER_OFF,
+	WM0010_OUT_OF_RESET,
+	WM0010_BOOTROM,
+	WM0010_STAGE2,
+	WM0010_FIRMWARE,
+};
+
+struct wm0010_priv {
+	struct snd_soc_codec *codec;
+
+	struct mutex lock;
+	struct device *dev;
+
+	struct wm0010_pdata pdata;
+
+	int gpio_reset;
+	int gpio_reset_value;
+
+	struct regulator_bulk_data core_supplies[2];
+	struct regulator *dbvdd;
+
+	int sysclk;
+
+	enum wm0010_state state;
+	bool boot_failed;
+	int boot_done;
+	bool ready;
+	bool pll_running;
+	int max_spi_freq;
+	int board_max_spi_speed;
+	u32 pll_clkctrl1;
+
+	spinlock_t irq_lock;
+	int irq;
+
+	struct completion boot_completion;
+};
+
+struct wm0010_spi_msg {
+	struct spi_message m;
+	struct spi_transfer t;
+	u8 *tx_buf;
+	u8 *rx_buf;
+	size_t len;
+};
+
+static const struct snd_soc_dapm_route wm0010_dapm_routes[] = {
+	{ "SDI2 Playback", NULL, "SDI1 Playback" },
+};
+
+static const char *wm0010_state_to_str(enum wm0010_state state)
+{
+	const char *state_to_str[] = {
+		"Power off",
+		"Out of reset",
+		"Bootrom",
+		"Stage2",
+		"Firmware"
+	};
+
+	if (state < 0 || state >= ARRAY_SIZE(state_to_str))
+		return "null";
+	return state_to_str[state];
+}
+
+/* Called with wm0010->lock held */
+static void wm0010_halt(struct snd_soc_codec *codec)
+{
+	struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
+	unsigned long flags;
+	enum wm0010_state state;
+
+	/* Fetch the wm0010 state */
+	spin_lock_irqsave(&wm0010->irq_lock, flags);
+	state = wm0010->state;
+	spin_unlock_irqrestore(&wm0010->irq_lock, flags);
+
+	switch (state) {
+	case WM0010_POWER_OFF:
+		/* If there's nothing to do, bail out */
+		return;
+	case WM0010_OUT_OF_RESET:
+	case WM0010_BOOTROM:
+	case WM0010_STAGE2:
+	case WM0010_FIRMWARE:
+		/* Remember to put chip back into reset */
+		gpio_set_value(wm0010->gpio_reset, wm0010->gpio_reset_value);
+		/* Disable the regulators */
+		regulator_disable(wm0010->dbvdd);
+		regulator_bulk_disable(ARRAY_SIZE(wm0010->core_supplies),
+				       wm0010->core_supplies);
+		break;
+	}
+
+	spin_lock_irqsave(&wm0010->irq_lock, flags);
+	wm0010->state = WM0010_POWER_OFF;
+	spin_unlock_irqrestore(&wm0010->irq_lock, flags);
+}
+
+struct wm0010_boot_xfer {
+	struct list_head list;
+	struct snd_soc_codec *codec;
+	struct completion *done;
+	struct spi_message m;
+	struct spi_transfer t;
+};
+
+/* Called with wm0010->lock held */
+static void wm0010_mark_boot_failure(struct wm0010_priv *wm0010)
+{
+	enum wm0010_state state;
+	unsigned long flags;
+
+	spin_lock_irqsave(&wm0010->irq_lock, flags);
+	state = wm0010->state;
+	spin_unlock_irqrestore(&wm0010->irq_lock, flags);
+
+	dev_err(wm0010->dev, "Failed to transition from `%s' state to `%s' state\n",
+		wm0010_state_to_str(state), wm0010_state_to_str(state + 1));
+
+	wm0010->boot_failed = true;
+}
+
+static void wm0010_boot_xfer_complete(void *data)
+{
+	struct wm0010_boot_xfer *xfer = data;
+	struct snd_soc_codec *codec = xfer->codec;
+	struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
+	u32 *out32 = xfer->t.rx_buf;
+	int i;
+
+	if (xfer->m.status != 0) {
+		dev_err(codec->dev, "SPI transfer failed: %d\n",
+			xfer->m.status);
+		wm0010_mark_boot_failure(wm0010);
+		if (xfer->done)
+			complete(xfer->done);
+		return;
+	}
+
+	for (i = 0; i < xfer->t.len / 4; i++) {
+		dev_dbg(codec->dev, "%d: %04x\n", i, out32[i]);
+
+		switch (be32_to_cpu(out32[i])) {
+		case 0xe0e0e0e0:
+			dev_err(codec->dev,
+				"%d: ROM error reported in stage 2\n", i);
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		case 0x55555555:
+			if (wm0010->boot_done == 0)
+				break;
+			dev_err(codec->dev,
+				"%d: ROM bootloader running in stage 2\n", i);
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		case 0x0fed0000:
+			dev_dbg(codec->dev, "Stage2 loader running\n");
+			break;
+
+		case 0x0fed0007:
+			dev_dbg(codec->dev, "CODE_HDR packet received\n");
+			break;
+
+		case 0x0fed0008:
+			dev_dbg(codec->dev, "CODE_DATA packet received\n");
+			break;
+
+		case 0x0fed0009:
+			dev_dbg(codec->dev, "Download complete\n");
+			break;
+
+		case 0x0fed000c:
+			dev_dbg(codec->dev, "Application start\n");
+			break;
+
+		case 0x0fed000e:
+			dev_dbg(codec->dev, "PLL packet received\n");
+			wm0010->pll_running = true;
+			break;
+
+		case 0x0fed0025:
+			dev_err(codec->dev, "Device reports image too long\n");
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		case 0x0fed002c:
+			dev_err(codec->dev, "Device reports bad SPI packet\n");
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		case 0x0fed0031:
+			dev_err(codec->dev, "Device reports SPI read overflow\n");
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		case 0x0fed0032:
+			dev_err(codec->dev, "Device reports SPI underclock\n");
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		case 0x0fed0033:
+			dev_err(codec->dev, "Device reports bad header packet\n");
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		case 0x0fed0034:
+			dev_err(codec->dev, "Device reports invalid packet type\n");
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		case 0x0fed0035:
+			dev_err(codec->dev, "Device reports data before header error\n");
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		case 0x0fed0038:
+			dev_err(codec->dev, "Device reports invalid PLL packet\n");
+			break;
+
+		case 0x0fed003a:
+			dev_err(codec->dev, "Device reports packet alignment error\n");
+			wm0010_mark_boot_failure(wm0010);
+			break;
+
+		default:
+			dev_err(codec->dev, "Unrecognised return 0x%x\n",
+			    be32_to_cpu(out32[i]));
+			wm0010_mark_boot_failure(wm0010);
+			break;
+		}
+
+		if (wm0010->boot_failed)
+			break;
+	}
+
+	wm0010->boot_done++;
+	if (xfer->done)
+		complete(xfer->done);
+}
+
+static void byte_swap_64(u64 *data_in, u64 *data_out, u32 len)
+{
+	int i;
+
+	for (i = 0; i < len / 8; i++)
+		data_out[i] = cpu_to_be64(le64_to_cpu(data_in[i]));
+}
+
+static int wm0010_boot(struct snd_soc_codec *codec)
+{
+	struct spi_device *spi = to_spi_device(codec->dev);
+	struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
+	unsigned long flags;
+	struct list_head xfer_list;
+	struct wm0010_boot_xfer *xfer;
+	int ret;
+	struct completion done;
+	const struct firmware *fw;
+	const struct dfw_binrec *rec;
+	struct spi_message m;
+	struct spi_transfer t;
+	struct dfw_pllrec pll_rec;
+	u32 *img, *p;
+	u64 *img_swap;
+	u8 *out;
+	u32 len, offset;
+	int i;
+
+	spin_lock_irqsave(&wm0010->irq_lock, flags);
+	if (wm0010->state != WM0010_POWER_OFF)
+		dev_warn(wm0010->dev, "DSP already powered up!\n");
+	spin_unlock_irqrestore(&wm0010->irq_lock, flags);
+
+	if (wm0010->sysclk > 26000000) {
+		dev_err(codec->dev, "Max DSP clock frequency is 26MHz\n");
+		ret = -ECANCELED;
+		goto err;
+	}
+
+	INIT_LIST_HEAD(&xfer_list);
+
+	mutex_lock(&wm0010->lock);
+	wm0010->pll_running = false;
+
+	dev_dbg(codec->dev, "max_spi_freq: %d\n", wm0010->max_spi_freq);
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(wm0010->core_supplies),
+				    wm0010->core_supplies);
+	if (ret != 0) {
+		dev_err(&spi->dev, "Failed to enable core supplies: %d\n",
+			ret);
+		mutex_unlock(&wm0010->lock);
+		goto err;
+	}
+
+	ret = regulator_enable(wm0010->dbvdd);
+	if (ret != 0) {
+		dev_err(&spi->dev, "Failed to enable DBVDD: %d\n", ret);
+		goto err_core;
+	}
+
+	/* Release reset */
+	gpio_set_value(wm0010->gpio_reset, !wm0010->gpio_reset_value);
+	spin_lock_irqsave(&wm0010->irq_lock, flags);
+	wm0010->state = WM0010_OUT_OF_RESET;
+	spin_unlock_irqrestore(&wm0010->irq_lock, flags);
+
+	/* First the bootloader */
+	ret = request_firmware(&fw, "wm0010_stage2.bin", codec->dev);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to request stage2 loader: %d\n",
+			ret);
+		goto abort;
+	}
+
+	if (!wait_for_completion_timeout(&wm0010->boot_completion,
+					 msecs_to_jiffies(10)))
+		dev_err(codec->dev, "Failed to get interrupt from DSP\n");
+
+	spin_lock_irqsave(&wm0010->irq_lock, flags);
+	wm0010->state = WM0010_BOOTROM;
+	spin_unlock_irqrestore(&wm0010->irq_lock, flags);
+
+	dev_dbg(codec->dev, "Downloading %d byte stage 2 loader\n", fw->size);
+
+	/* Copy to local buffer first as vmalloc causes problems for dma */
+	img = kzalloc(fw->size, GFP_KERNEL);
+	if (!img) {
+		dev_err(codec->dev, "Failed to allocate image buffer\n");
+		goto abort;
+	}
+
+	out = kzalloc(fw->size, GFP_KERNEL);
+	if (!out) {
+		dev_err(codec->dev, "Failed to allocate output buffer\n");
+		goto abort;
+	}
+
+	memcpy(img, &fw->data[0], fw->size);
+
+	spi_message_init(&m);
+	memset(&t, 0, sizeof(t));
+	t.rx_buf = out;
+	t.tx_buf = img;
+	t.len = fw->size;
+	t.bits_per_word = 8;
+	t.speed_hz = wm0010->sysclk / 10;
+	spi_message_add_tail(&t, &m);
+
+	dev_dbg(codec->dev, "Starting initial download at %dHz\n",
+		t.speed_hz);
+
+	ret = spi_sync(spi, &m);
+	if (ret != 0) {
+		dev_err(codec->dev, "Initial download failed: %d\n", ret);
+		goto abort;
+	}
+
+	/* Look for errors from the boot ROM */
+	for (i = 0; i < fw->size; i++) {
+		if (out[i] != 0x55) {
+			ret = -EBUSY;
+			dev_err(codec->dev, "Boot ROM error: %x in %d\n",
+				out[i], i);
+			wm0010_mark_boot_failure(wm0010);
+			goto abort;
+		}
+	}
+
+	release_firmware(fw);
+	kfree(img);
+	kfree(out);
+
+	if (!wait_for_completion_timeout(&wm0010->boot_completion,
+					 msecs_to_jiffies(10)))
+		dev_err(codec->dev, "Failed to get interrupt from DSP loader.\n");
+
+	spin_lock_irqsave(&wm0010->irq_lock, flags);
+	wm0010->state = WM0010_STAGE2;
+	spin_unlock_irqrestore(&wm0010->irq_lock, flags);
+
+	/* Only initialise PLL if max_spi_freq initialised */
+	if (wm0010->max_spi_freq) {
+
+		/* Initialise a PLL record */
+		memset(&pll_rec, 0, sizeof(pll_rec));
+		pll_rec.command = DFW_CMD_PLL;
+		pll_rec.length = (sizeof(pll_rec) - 8);
+
+		/* On wm0010 only the CLKCTRL1 value is used */
+		pll_rec.clkctrl1 = wm0010->pll_clkctrl1;
+
+		len = pll_rec.length + 8;
+		out = kzalloc(len, GFP_KERNEL);
+		if (!out) {
+			dev_err(codec->dev,
+				"Failed to allocate RX buffer\n");
+			goto abort;
+		}
+
+		img_swap = kzalloc(len, GFP_KERNEL);
+		if (!img_swap) {
+			dev_err(codec->dev,
+				"Failed to allocate image buffer\n");
+			goto abort;
+		}
+
+		/* We need to re-order for 0010 */
+		byte_swap_64((u64 *)&pll_rec, img_swap, len);
+
+		spi_message_init(&m);
+		memset(&t, 0, sizeof(t));
+		t.rx_buf = out;
+		t.tx_buf = img_swap;
+		t.len = len;
+		t.bits_per_word = 8;
+		t.speed_hz = wm0010->sysclk / 6;
+		spi_message_add_tail(&t, &m);
+
+		ret = spi_sync(spi, &m);
+		if (ret != 0) {
+			dev_err(codec->dev, "First PLL write failed: %d\n", ret);
+			goto abort;
+		}
+
+		/* Use a second send of the message to get the return status */
+		ret = spi_sync(spi, &m);
+		if (ret != 0) {
+			dev_err(codec->dev, "Second PLL write failed: %d\n", ret);
+			goto abort;
+		}
+
+		p = (u32 *)out;
+
+		/* Look for PLL active code from the DSP */
+		for (i = 0; i < len / 4; i++) {
+			if (*p == 0x0e00ed0f) {
+				dev_dbg(codec->dev, "PLL packet received\n");
+				wm0010->pll_running = true;
+				break;
+			}
+			p++;
+		}
+
+		kfree(img_swap);
+		kfree(out);
+	} else
+		dev_dbg(codec->dev, "Not enabling DSP PLL.");
+
+	ret = request_firmware(&fw, "wm0010.dfw", codec->dev);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to request application: %d\n",
+			ret);
+		goto abort;
+	}
+
+	rec = (const struct dfw_binrec *)fw->data;
+	offset = 0;
+	wm0010->boot_done = 0;
+	wm0010->boot_failed = false;
+	BUG_ON(!list_empty(&xfer_list));
+	init_completion(&done);
+
+	/* First record should be INFO */
+	if (rec->command != DFW_CMD_INFO) {
+		dev_err(codec->dev, "First record not INFO\r\n");
+		goto abort;
+	}
+
+	/* Check it's a 0010 file */
+	if (rec->data[0] != DEVICE_ID_WM0010) {
+		dev_err(codec->dev, "Not a WM0010 firmware file.\r\n");
+		goto abort;
+	}
+
+	/* Skip the info record as we don't need to send it */
+	offset += ((rec->length) + 8);
+	rec = (void *)&rec->data[rec->length];
+
+	while (offset < fw->size) {
+		dev_dbg(codec->dev,
+			"Packet: command %d, data length = 0x%x\r\n",
+			rec->command, rec->length);
+		len = rec->length + 8;
+
+		out = kzalloc(len, GFP_KERNEL);
+		if (!out) {
+			dev_err(codec->dev,
+				"Failed to allocate RX buffer\n");
+			goto abort;
+		}
+
+		img_swap = kzalloc(len, GFP_KERNEL);
+		if (!img_swap) {
+			dev_err(codec->dev,
+				"Failed to allocate image buffer\n");
+			goto abort;
+		}
+
+		/* We need to re-order for 0010 */
+		byte_swap_64((u64 *)&rec->command, img_swap, len);
+
+		xfer = kzalloc(sizeof(*xfer), GFP_KERNEL);
+		if (!xfer) {
+			dev_err(codec->dev, "Failed to allocate xfer\n");
+			goto abort;
+		}
+
+		xfer->codec = codec;
+		list_add_tail(&xfer->list, &xfer_list);
+
+		spi_message_init(&xfer->m);
+		xfer->m.complete = wm0010_boot_xfer_complete;
+		xfer->m.context = xfer;
+		xfer->t.tx_buf = img_swap;
+		xfer->t.rx_buf = out;
+		xfer->t.len = len;
+		xfer->t.bits_per_word = 8;
+
+		if (!wm0010->pll_running) {
+			xfer->t.speed_hz = wm0010->sysclk / 6;
+		} else {
+			xfer->t.speed_hz = wm0010->max_spi_freq;
+
+			if (wm0010->board_max_spi_speed &&
+			   (wm0010->board_max_spi_speed < wm0010->max_spi_freq))
+					xfer->t.speed_hz = wm0010->board_max_spi_speed;
+		}
+
+		/* Store max usable spi frequency for later use */
+		wm0010->max_spi_freq = xfer->t.speed_hz;
+
+		spi_message_add_tail(&xfer->t, &xfer->m);
+
+		offset += ((rec->length) + 8);
+		rec = (void *)&rec->data[rec->length];
+
+		if (offset >= fw->size) {
+			dev_dbg(codec->dev, "All transfers scheduled\n");
+			xfer->done = &done;
+		}
+
+		ret = spi_async(spi, &xfer->m);
+		if (ret != 0) {
+			dev_err(codec->dev, "Write failed: %d\n", ret);
+			goto abort;
+		}
+
+		if (wm0010->boot_failed)
+			goto abort;
+	}
+
+	wait_for_completion(&done);
+
+	spin_lock_irqsave(&wm0010->irq_lock, flags);
+	wm0010->state = WM0010_FIRMWARE;
+	spin_unlock_irqrestore(&wm0010->irq_lock, flags);
+
+	mutex_unlock(&wm0010->lock);
+
+	release_firmware(fw);
+
+	while (!list_empty(&xfer_list)) {
+		xfer = list_first_entry(&xfer_list, struct wm0010_boot_xfer,
+					list);
+		kfree(xfer->t.rx_buf);
+		kfree(xfer->t.tx_buf);
+		list_del(&xfer->list);
+		kfree(xfer);
+	}
+
+	return 0;
+
+abort:
+	/* Put the chip back into reset */
+	wm0010_halt(codec);
+	mutex_unlock(&wm0010->lock);
+	return ret;
+err_core:
+	regulator_bulk_disable(ARRAY_SIZE(wm0010->core_supplies),
+			       wm0010->core_supplies);
+err:
+	return ret;
+}
+
+static int wm0010_set_bias_level(struct snd_soc_codec *codec,
+				 enum snd_soc_bias_level level)
+{
+	struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		if (codec->dapm.bias_level == SND_SOC_BIAS_PREPARE)
+			wm0010_boot(codec);
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		if (codec->dapm.bias_level == SND_SOC_BIAS_PREPARE) {
+			mutex_lock(&wm0010->lock);
+			wm0010_halt(codec);
+			mutex_unlock(&wm0010->lock);
+		}
+		break;
+	case SND_SOC_BIAS_OFF:
+		break;
+	}
+
+	codec->dapm.bias_level = level;
+
+	return 0;
+}
+
+static int wm0010_set_sysclk(struct snd_soc_codec *codec, int source,
+			     int clk_id, unsigned int freq, int dir)
+{
+	struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
+	unsigned int i;
+
+	wm0010->sysclk = freq;
+
+	if (freq < pll_clock_map[ARRAY_SIZE(pll_clock_map)-1].max_sysclk) {
+		wm0010->max_spi_freq = 0;
+	} else {
+		for (i = 0; i < ARRAY_SIZE(pll_clock_map); i++)
+			if (freq >= pll_clock_map[i].max_sysclk)
+				break;
+
+		wm0010->max_spi_freq = pll_clock_map[i].max_pll_spi_speed;
+		wm0010->pll_clkctrl1 = pll_clock_map[i].pll_clkctrl1;
+	}
+
+	return 0;
+}
+
+static int wm0010_probe(struct snd_soc_codec *codec);
+
+static struct snd_soc_codec_driver soc_codec_dev_wm0010 = {
+	.probe = wm0010_probe,
+	.set_bias_level = wm0010_set_bias_level,
+	.set_sysclk = wm0010_set_sysclk,
+
+	.dapm_routes = wm0010_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(wm0010_dapm_routes),
+};
+
+#define WM0010_RATES (SNDRV_PCM_RATE_48000)
+#define WM0010_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
+			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |\
+			SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_driver wm0010_dai[] = {
+	{
+		.name = "wm0010-sdi1",
+		.playback = {
+			.stream_name = "SDI1 Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = WM0010_RATES,
+			.formats = WM0010_FORMATS,
+		},
+		.capture = {
+			 .stream_name = "SDI1 Capture",
+			 .channels_min = 1,
+			 .channels_max = 2,
+			 .rates = WM0010_RATES,
+			 .formats = WM0010_FORMATS,
+		 },
+	},
+	{
+		.name = "wm0010-sdi2",
+		.playback = {
+			.stream_name = "SDI2 Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = WM0010_RATES,
+			.formats = WM0010_FORMATS,
+		},
+		.capture = {
+			 .stream_name = "SDI2 Capture",
+			 .channels_min = 1,
+			 .channels_max = 2,
+			 .rates = WM0010_RATES,
+			 .formats = WM0010_FORMATS,
+		 },
+	},
+};
+
+static irqreturn_t wm0010_irq(int irq, void *data)
+{
+	struct wm0010_priv *wm0010 = data;
+
+	switch (wm0010->state) {
+	case WM0010_POWER_OFF:
+	case WM0010_OUT_OF_RESET:
+	case WM0010_BOOTROM:
+	case WM0010_STAGE2:
+		spin_lock(&wm0010->irq_lock);
+		complete(&wm0010->boot_completion);
+		spin_unlock(&wm0010->irq_lock);
+		return IRQ_HANDLED;
+	default:
+		return IRQ_NONE;
+	}
+
+	return IRQ_NONE;
+}
+
+static int wm0010_probe(struct snd_soc_codec *codec)
+{
+	struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
+	struct spi_device *spi = to_spi_device(wm0010->dev);
+	unsigned long flags;
+	unsigned long gpio_flags;
+	int ret;
+	int trigger;
+	int irq;
+
+	wm0010->codec = codec;
+
+	init_completion(&wm0010->boot_completion);
+
+	wm0010->core_supplies[0].supply = "AVDD";
+	wm0010->core_supplies[1].supply = "DCVDD";
+	ret = devm_regulator_bulk_get(wm0010->dev, ARRAY_SIZE(wm0010->core_supplies),
+				      wm0010->core_supplies);
+	if (ret != 0) {
+		dev_err(wm0010->dev, "Failed to obtain core supplies: %d\n",
+			ret);
+		return ret;
+	}
+
+	wm0010->dbvdd = devm_regulator_get(wm0010->dev, "DBVDD");
+	if (IS_ERR(wm0010->dbvdd)) {
+		ret = PTR_ERR(wm0010->dbvdd);
+		dev_err(wm0010->dev, "Failed to obtain DBVDD: %d\n", ret);
+		return ret;
+	}
+
+	if (wm0010->pdata.gpio_reset) {
+		wm0010->gpio_reset = wm0010->pdata.gpio_reset;
+
+		if (wm0010->pdata.reset_active_high)
+			wm0010->gpio_reset_value = 1;
+		else
+			wm0010->gpio_reset_value = 0;
+
+		if (wm0010->gpio_reset_value)
+			gpio_flags = GPIOF_OUT_INIT_HIGH;
+		else
+			gpio_flags = GPIOF_OUT_INIT_LOW;
+
+		ret = devm_gpio_request_one(wm0010->dev, wm0010->gpio_reset,
+					    gpio_flags, "wm0010 reset");
+		if (ret < 0) {
+			dev_err(wm0010->dev,
+				"Failed to request GPIO for DSP reset: %d\n",
+				ret);
+			return ret;
+		}
+	} else {
+		dev_err(wm0010->dev, "No reset GPIO configured\n");
+		return ret;
+	}
+
+	irq = spi->irq;
+	if (wm0010->pdata.irq_flags)
+		trigger = wm0010->pdata.irq_flags;
+	else
+		trigger = IRQF_TRIGGER_FALLING;
+	trigger |= IRQF_ONESHOT;
+
+	ret = request_threaded_irq(irq, NULL, wm0010_irq, trigger,
+				   "wm0010", wm0010);
+	if (ret)
+		dev_err(wm0010->dev, "Failed to request IRQ %d: %d\n",
+			irq, ret);
+	wm0010->irq = irq;
+
+	if (spi->max_speed_hz)
+		wm0010->board_max_spi_speed = spi->max_speed_hz;
+	else
+		wm0010->board_max_spi_speed = 0;
+
+	spin_lock_irqsave(&wm0010->irq_lock, flags);
+	wm0010->state = WM0010_POWER_OFF;
+	spin_unlock_irqrestore(&wm0010->irq_lock, flags);
+
+	return 0;
+}
+
+static int __devinit wm0010_spi_probe(struct spi_device *spi)
+{
+	struct wm0010_priv *wm0010;
+	int ret;
+
+	wm0010 = devm_kzalloc(&spi->dev, sizeof(*wm0010),
+			      GFP_KERNEL);
+	if (!wm0010)
+		return -ENOMEM;
+
+	mutex_init(&wm0010->lock);
+	spin_lock_init(&wm0010->irq_lock);
+
+	spi_set_drvdata(spi, wm0010);
+	wm0010->dev = &spi->dev;
+
+	if (dev_get_platdata(&spi->dev))
+		memcpy(&wm0010->pdata, dev_get_platdata(&spi->dev),
+		       sizeof(wm0010->pdata));
+
+	ret = snd_soc_register_codec(&spi->dev,
+				     &soc_codec_dev_wm0010, wm0010_dai,
+				     ARRAY_SIZE(wm0010_dai));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int __devexit wm0010_spi_remove(struct spi_device *spi)
+{
+	struct wm0010_priv *wm0010 = spi_get_drvdata(spi);
+
+	snd_soc_unregister_codec(&spi->dev);
+
+	if (wm0010->gpio_reset) {
+		/* Remember to put chip back into reset */
+		gpio_set_value(wm0010->gpio_reset, wm0010->gpio_reset_value);
+		gpio_free(wm0010->gpio_reset);
+	}
+
+	if (wm0010->irq)
+		free_irq(wm0010->irq, wm0010);
+
+	return 0;
+}
+
+static struct spi_driver wm0010_spi_driver = {
+	.driver = {
+		.name	= "wm0010",
+		.bus 	= &spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= wm0010_spi_probe,
+	.remove		= __devexit_p(wm0010_spi_remove),
+};
+
+module_spi_driver(wm0010_spi_driver);
+
+MODULE_DESCRIPTION("ASoC WM0010 driver");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");