1 files changed, 566 insertions, 0 deletions

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
new file mode 100644
index 000000000000..c7983e862549
--- /dev/null
+++ b/drivers/mfd/arizona-core.c
@@ -0,0 +1,566 @@
+/*
+ * Arizona core driver
+ *
+ * Copyright 2012 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@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/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/arizona/core.h>
+#include <linux/mfd/arizona/registers.h>
+
+#include "arizona.h"
+
+static const char *wm5102_core_supplies[] = {
+	"AVDD",
+	"DBVDD1",
+};
+
+int arizona_clk32k_enable(struct arizona *arizona)
+{
+	int ret = 0;
+
+	mutex_lock(&arizona->clk_lock);
+
+	arizona->clk32k_ref++;
+
+	if (arizona->clk32k_ref == 1)
+		ret = regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
+					 ARIZONA_CLK_32K_ENA,
+					 ARIZONA_CLK_32K_ENA);
+
+	if (ret != 0)
+		arizona->clk32k_ref--;
+
+	mutex_unlock(&arizona->clk_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(arizona_clk32k_enable);
+
+int arizona_clk32k_disable(struct arizona *arizona)
+{
+	int ret = 0;
+
+	mutex_lock(&arizona->clk_lock);
+
+	BUG_ON(arizona->clk32k_ref <= 0);
+
+	arizona->clk32k_ref--;
+
+	if (arizona->clk32k_ref == 0)
+		regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
+				   ARIZONA_CLK_32K_ENA, 0);
+
+	mutex_unlock(&arizona->clk_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(arizona_clk32k_disable);
+
+static irqreturn_t arizona_clkgen_err(int irq, void *data)
+{
+	struct arizona *arizona = data;
+
+	dev_err(arizona->dev, "CLKGEN error\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t arizona_underclocked(int irq, void *data)
+{
+	struct arizona *arizona = data;
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_8,
+			  &val);
+	if (ret != 0) {
+		dev_err(arizona->dev, "Failed to read underclock status: %d\n",
+			ret);
+		return IRQ_NONE;
+	}
+
+	if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "AIF3 underclocked\n");
+	if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "AIF3 underclocked\n");
+	if (val & ARIZONA_AIF2_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "AIF1 underclocked\n");
+	if (val & ARIZONA_ISRC2_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "ISRC2 underclocked\n");
+	if (val & ARIZONA_ISRC1_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "ISRC1 underclocked\n");
+	if (val & ARIZONA_FX_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "FX underclocked\n");
+	if (val & ARIZONA_ASRC_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "ASRC underclocked\n");
+	if (val & ARIZONA_DAC_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "DAC underclocked\n");
+	if (val & ARIZONA_ADC_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "ADC underclocked\n");
+	if (val & ARIZONA_MIXER_UNDERCLOCKED_STS)
+		dev_err(arizona->dev, "Mixer underclocked\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t arizona_overclocked(int irq, void *data)
+{
+	struct arizona *arizona = data;
+	unsigned int val[2];
+	int ret;
+	
+	ret = regmap_bulk_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_6,
+			       &val[0], 2);
+	if (ret != 0) {
+		dev_err(arizona->dev, "Failed to read overclock status: %d\n",
+			ret);
+		return IRQ_NONE;
+	}
+
+	if (val[0] & ARIZONA_PWM_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "PWM overclocked\n");
+	if (val[0] & ARIZONA_FX_CORE_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "FX core overclocked\n");
+	if (val[0] & ARIZONA_DAC_SYS_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "DAC SYS overclocked\n");
+	if (val[0] & ARIZONA_DAC_WARP_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "DAC WARP overclocked\n");
+	if (val[0] & ARIZONA_ADC_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "ADC overclocked\n");
+	if (val[0] & ARIZONA_MIXER_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "Mixer overclocked\n");
+	if (val[0] & ARIZONA_AIF3_SYNC_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "AIF3 overclocked\n");
+	if (val[0] & ARIZONA_AIF2_SYNC_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "AIF2 overclocked\n");
+	if (val[0] & ARIZONA_AIF1_SYNC_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "AIF1 overclocked\n");
+	if (val[0] & ARIZONA_PAD_CTRL_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "Pad control overclocked\n");
+
+	if (val[1] & ARIZONA_SLIMBUS_SUBSYS_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "Slimbus subsystem overclocked\n");
+	if (val[1] & ARIZONA_SLIMBUS_ASYNC_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "Slimbus async overclocked\n");
+	if (val[1] & ARIZONA_SLIMBUS_SYNC_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "Slimbus sync overclocked\n");
+	if (val[1] & ARIZONA_ASRC_ASYNC_SYS_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "ASRC async system overclocked\n");
+	if (val[1] & ARIZONA_ASRC_ASYNC_WARP_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "ASRC async WARP overclocked\n");
+	if (val[1] & ARIZONA_ASRC_SYNC_SYS_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "ASRC sync system overclocked\n");
+	if (val[1] & ARIZONA_ASRC_SYNC_WARP_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "ASRC sync WARP overclocked\n");
+	if (val[1] & ARIZONA_ADSP2_1_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "DSP1 overclocked\n");
+	if (val[1] & ARIZONA_ISRC2_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "ISRC2 overclocked\n");
+	if (val[1] & ARIZONA_ISRC1_OVERCLOCKED_STS)
+		dev_err(arizona->dev, "ISRC1 overclocked\n");
+
+	return IRQ_HANDLED;
+}
+
+static int arizona_wait_for_boot(struct arizona *arizona)
+{
+	unsigned int reg;
+	int ret, i;
+
+	/*
+	 * We can't use an interrupt as we need to runtime resume to do so,
+	 * we won't race with the interrupt handler as it'll be blocked on
+	 * runtime resume.
+	 */
+	for (i = 0; i < 5; i++) {
+		msleep(1);
+
+		ret = regmap_read(arizona->regmap,
+				  ARIZONA_INTERRUPT_RAW_STATUS_5, &reg);
+		if (ret != 0) {
+			dev_err(arizona->dev, "Failed to read boot state: %d\n",
+				ret);
+			continue;
+		}
+
+		if (reg & ARIZONA_BOOT_DONE_STS)
+			break;
+	}
+
+	if (reg & ARIZONA_BOOT_DONE_STS) {
+		regmap_write(arizona->regmap, ARIZONA_INTERRUPT_STATUS_5,
+			     ARIZONA_BOOT_DONE_STS);
+	} else {
+		dev_err(arizona->dev, "Device boot timed out: %x\n", reg);
+		return -ETIMEDOUT;
+	}
+
+	pm_runtime_mark_last_busy(arizona->dev);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int arizona_runtime_resume(struct device *dev)
+{
+	struct arizona *arizona = dev_get_drvdata(dev);
+	int ret;
+
+	dev_dbg(arizona->dev, "Leaving AoD mode\n");
+
+	ret = regulator_enable(arizona->dcvdd);
+	if (ret != 0) {
+		dev_err(arizona->dev, "Failed to enable DCVDD: %d\n", ret);
+		return ret;
+	}
+
+	regcache_cache_only(arizona->regmap, false);
+
+	ret = arizona_wait_for_boot(arizona);
+	if (ret != 0) {
+		regulator_disable(arizona->dcvdd);
+		return ret;
+	}
+
+	regcache_sync(arizona->regmap);
+
+	return 0;
+}
+
+static int arizona_runtime_suspend(struct device *dev)
+{
+	struct arizona *arizona = dev_get_drvdata(dev);
+
+	dev_dbg(arizona->dev, "Entering AoD mode\n");
+
+	regulator_disable(arizona->dcvdd);
+	regcache_cache_only(arizona->regmap, true);
+	regcache_mark_dirty(arizona->regmap);
+
+	return 0;
+}
+#endif
+
+const struct dev_pm_ops arizona_pm_ops = {
+	SET_RUNTIME_PM_OPS(arizona_runtime_suspend,
+			   arizona_runtime_resume,
+			   NULL)
+};
+EXPORT_SYMBOL_GPL(arizona_pm_ops);
+
+static struct mfd_cell early_devs[] = {
+	{ .name = "arizona-ldo1" },
+};
+
+static struct mfd_cell wm5102_devs[] = {
+	{ .name = "arizona-extcon" },
+	{ .name = "arizona-gpio" },
+	{ .name = "arizona-micsupp" },
+	{ .name = "arizona-pwm" },
+	{ .name = "wm5102-codec" },
+};
+
+static struct mfd_cell wm5110_devs[] = {
+	{ .name = "arizona-extcon" },
+	{ .name = "arizona-gpio" },
+	{ .name = "arizona-micsupp" },
+	{ .name = "arizona-pwm" },
+	{ .name = "wm5110-codec" },
+};
+
+int __devinit arizona_dev_init(struct arizona *arizona)
+{
+	struct device *dev = arizona->dev;
+	const char *type_name;
+	unsigned int reg, val;
+	int ret, i;
+
+	dev_set_drvdata(arizona->dev, arizona);
+	mutex_init(&arizona->clk_lock);
+
+	if (dev_get_platdata(arizona->dev))
+		memcpy(&arizona->pdata, dev_get_platdata(arizona->dev),
+		       sizeof(arizona->pdata));
+
+	regcache_cache_only(arizona->regmap, true);
+
+	switch (arizona->type) {
+	case WM5102:
+	case WM5110:
+		for (i = 0; i < ARRAY_SIZE(wm5102_core_supplies); i++)
+			arizona->core_supplies[i].supply
+				= wm5102_core_supplies[i];
+		arizona->num_core_supplies = ARRAY_SIZE(wm5102_core_supplies);
+		break;
+	default:
+		dev_err(arizona->dev, "Unknown device type %d\n",
+			arizona->type);
+		return -EINVAL;
+	}
+
+	ret = mfd_add_devices(arizona->dev, -1, early_devs,
+			      ARRAY_SIZE(early_devs), NULL, 0);
+	if (ret != 0) {
+		dev_err(dev, "Failed to add early children: %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_regulator_bulk_get(dev, arizona->num_core_supplies,
+				      arizona->core_supplies);
+	if (ret != 0) {
+		dev_err(dev, "Failed to request core supplies: %d\n",
+			ret);
+		goto err_early;
+	}
+
+	arizona->dcvdd = devm_regulator_get(arizona->dev, "DCVDD");
+	if (IS_ERR(arizona->dcvdd)) {
+		ret = PTR_ERR(arizona->dcvdd);
+		dev_err(dev, "Failed to request DCVDD: %d\n", ret);
+		goto err_early;
+	}
+
+	ret = regulator_bulk_enable(arizona->num_core_supplies,
+				    arizona->core_supplies);
+	if (ret != 0) {
+		dev_err(dev, "Failed to enable core supplies: %d\n",
+			ret);
+		goto err_early;
+	}
+
+	ret = regulator_enable(arizona->dcvdd);
+	if (ret != 0) {
+		dev_err(dev, "Failed to enable DCVDD: %d\n", ret);
+		goto err_enable;
+	}
+
+	if (arizona->pdata.reset) {
+		/* Start out with /RESET low to put the chip into reset */
+		ret = gpio_request_one(arizona->pdata.reset,
+				       GPIOF_DIR_OUT | GPIOF_INIT_LOW,
+				       "arizona /RESET");
+		if (ret != 0) {
+			dev_err(dev, "Failed to request /RESET: %d\n", ret);
+			goto err_dcvdd;
+		}
+
+		gpio_set_value_cansleep(arizona->pdata.reset, 1);
+	}
+
+	regcache_cache_only(arizona->regmap, false);
+
+	ret = regmap_read(arizona->regmap, ARIZONA_SOFTWARE_RESET, &reg);
+	if (ret != 0) {
+		dev_err(dev, "Failed to read ID register: %d\n", ret);
+		goto err_reset;
+	}
+
+	ret = regmap_read(arizona->regmap, ARIZONA_DEVICE_REVISION,
+			  &arizona->rev);
+	if (ret != 0) {
+		dev_err(dev, "Failed to read revision register: %d\n", ret);
+		goto err_reset;
+	}
+	arizona->rev &= ARIZONA_DEVICE_REVISION_MASK;
+
+	switch (reg) {
+#ifdef CONFIG_MFD_WM5102
+	case 0x5102:
+		type_name = "WM5102";
+		if (arizona->type != WM5102) {
+			dev_err(arizona->dev, "WM5102 registered as %d\n",
+				arizona->type);
+			arizona->type = WM5102;
+		}
+		ret = wm5102_patch(arizona);
+		break;
+#endif
+#ifdef CONFIG_MFD_WM5110
+	case 0x5110:
+		type_name = "WM5110";
+		if (arizona->type != WM5110) {
+			dev_err(arizona->dev, "WM5110 registered as %d\n",
+				arizona->type);
+			arizona->type = WM5110;
+		}
+		ret = wm5110_patch(arizona);
+		break;
+#endif
+	default:
+		dev_err(arizona->dev, "Unknown device ID %x\n", reg);
+		goto err_reset;
+	}
+
+	dev_info(dev, "%s revision %c\n", type_name, arizona->rev + 'A');
+
+	if (ret != 0)
+		dev_err(arizona->dev, "Failed to apply patch: %d\n", ret);
+
+	/* If we have a /RESET GPIO we'll already be reset */
+	if (!arizona->pdata.reset) {
+		ret = regmap_write(arizona->regmap, ARIZONA_SOFTWARE_RESET, 0);
+		if (ret != 0) {
+			dev_err(dev, "Failed to reset device: %d\n", ret);
+			goto err_reset;
+		}
+	}
+
+	ret = arizona_wait_for_boot(arizona);
+	if (ret != 0) {
+		dev_err(arizona->dev, "Device failed initial boot: %d\n", ret);
+		goto err_reset;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(arizona->pdata.gpio_defaults); i++) {
+		if (!arizona->pdata.gpio_defaults[i])
+			continue;
+
+		regmap_write(arizona->regmap, ARIZONA_GPIO1_CTRL + i,
+			     arizona->pdata.gpio_defaults[i]);
+	}
+
+	pm_runtime_set_autosuspend_delay(arizona->dev, 100);
+	pm_runtime_use_autosuspend(arizona->dev);
+	pm_runtime_enable(arizona->dev);
+
+	/* Chip default */
+	if (!arizona->pdata.clk32k_src)
+		arizona->pdata.clk32k_src = ARIZONA_32KZ_MCLK2;
+
+	switch (arizona->pdata.clk32k_src) {
+	case ARIZONA_32KZ_MCLK1:
+	case ARIZONA_32KZ_MCLK2:
+		regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
+				   ARIZONA_CLK_32K_SRC_MASK,
+				   arizona->pdata.clk32k_src - 1);
+		break;
+	case ARIZONA_32KZ_NONE:
+		regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
+				   ARIZONA_CLK_32K_SRC_MASK, 2);
+		break;
+	default:
+		dev_err(arizona->dev, "Invalid 32kHz clock source: %d\n",
+			arizona->pdata.clk32k_src);
+		ret = -EINVAL;
+		goto err_reset;
+	}
+
+	for (i = 0; i < ARIZONA_MAX_INPUT; i++) {
+		/* Default for both is 0 so noop with defaults */
+		val = arizona->pdata.dmic_ref[i]
+			<< ARIZONA_IN1_DMIC_SUP_SHIFT;
+		val |= arizona->pdata.inmode[i] << ARIZONA_IN1_MODE_SHIFT;
+
+		regmap_update_bits(arizona->regmap,
+				   ARIZONA_IN1L_CONTROL + (i * 8),
+				   ARIZONA_IN1_DMIC_SUP_MASK |
+				   ARIZONA_IN1_MODE_MASK, val);
+	}
+
+	for (i = 0; i < ARIZONA_MAX_OUTPUT; i++) {
+		/* Default is 0 so noop with defaults */
+		if (arizona->pdata.out_mono[i])
+			val = ARIZONA_OUT1_MONO;
+		else
+			val = 0;
+
+		regmap_update_bits(arizona->regmap,
+				   ARIZONA_OUTPUT_PATH_CONFIG_1L + (i * 8),
+				   ARIZONA_OUT1_MONO, val);
+	}
+
+	for (i = 0; i < ARIZONA_MAX_PDM_SPK; i++) {
+		if (arizona->pdata.spk_mute[i])
+			regmap_update_bits(arizona->regmap,
+					   ARIZONA_PDM_SPK1_CTRL_1 + (i * 2),
+					   ARIZONA_SPK1_MUTE_ENDIAN_MASK |
+					   ARIZONA_SPK1_MUTE_SEQ1_MASK,
+					   arizona->pdata.spk_mute[i]);
+
+		if (arizona->pdata.spk_fmt[i])
+			regmap_update_bits(arizona->regmap,
+					   ARIZONA_PDM_SPK1_CTRL_2 + (i * 2),
+					   ARIZONA_SPK1_FMT_MASK,
+					   arizona->pdata.spk_fmt[i]);
+	}
+
+	/* Set up for interrupts */
+	ret = arizona_irq_init(arizona);
+	if (ret != 0)
+		goto err_reset;
+
+	arizona_request_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, "CLKGEN error",
+			    arizona_clkgen_err, arizona);
+	arizona_request_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, "Overclocked",
+			    arizona_overclocked, arizona);
+	arizona_request_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, "Underclocked",
+			    arizona_underclocked, arizona);
+
+	switch (arizona->type) {
+	case WM5102:
+		ret = mfd_add_devices(arizona->dev, -1, wm5102_devs,
+				      ARRAY_SIZE(wm5102_devs), NULL, 0);
+		break;
+	case WM5110:
+		ret = mfd_add_devices(arizona->dev, -1, wm5110_devs,
+				      ARRAY_SIZE(wm5102_devs), NULL, 0);
+		break;
+	}
+
+	if (ret != 0) {
+		dev_err(arizona->dev, "Failed to add subdevices: %d\n", ret);
+		goto err_irq;
+	}
+
+#ifdef CONFIG_PM_RUNTIME
+	regulator_disable(arizona->dcvdd);
+#endif
+
+	return 0;
+
+err_irq:
+	arizona_irq_exit(arizona);
+err_reset:
+	if (arizona->pdata.reset) {
+		gpio_set_value_cansleep(arizona->pdata.reset, 1);
+		gpio_free(arizona->pdata.reset);
+	}
+err_dcvdd:
+	regulator_disable(arizona->dcvdd);
+err_enable:
+	regulator_bulk_disable(arizona->num_core_supplies,
+			       arizona->core_supplies);
+err_early:
+	mfd_remove_devices(dev);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(arizona_dev_init);
+
+int __devexit arizona_dev_exit(struct arizona *arizona)
+{
+	mfd_remove_devices(arizona->dev);
+	arizona_free_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, arizona);
+	arizona_free_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, arizona);
+	arizona_free_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, arizona);
+	pm_runtime_disable(arizona->dev);
+	arizona_irq_exit(arizona);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(arizona_dev_exit);