ASoC: cs35l56: Move utility functions to shared file

Move the cs35l56 utility functions into the shared file so they are
available for use in HDA.

Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230721132120.5523-5-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 208 insertions, 0 deletions

diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c
index 47b915f33f52..d22aede1ee8d 100644
--- a/sound/soc/codecs/cs35l56-shared.c
+++ b/sound/soc/codecs/cs35l56-shared.c
@@ -195,6 +195,214 @@ static bool cs35l56_volatile_reg(struct device *dev, unsigned int reg)
 	}
 }
 
+int cs35l56_mbox_send(struct cs35l56_base *cs35l56_base, unsigned int command)
+{
+	unsigned int val;
+	int ret;
+
+	regmap_write(cs35l56_base->regmap, CS35L56_DSP_VIRTUAL1_MBOX_1, command);
+	ret = regmap_read_poll_timeout(cs35l56_base->regmap, CS35L56_DSP_VIRTUAL1_MBOX_1,
+				       val, (val == 0),
+				       CS35L56_MBOX_POLL_US, CS35L56_MBOX_TIMEOUT_US);
+	if (ret) {
+		dev_warn(cs35l56_base->dev, "MBOX command %#x failed: %d\n", command, ret);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_mbox_send, SND_SOC_CS35L56_SHARED);
+
+int cs35l56_wait_for_firmware_boot(struct cs35l56_base *cs35l56_base)
+{
+	unsigned int reg;
+	unsigned int val;
+	int ret;
+
+	if (cs35l56_base->rev < CS35L56_REVID_B0)
+		reg = CS35L56_DSP1_HALO_STATE_A1;
+	else
+		reg = CS35L56_DSP1_HALO_STATE;
+
+	ret = regmap_read_poll_timeout(cs35l56_base->regmap, reg,
+				       val,
+				       (val < 0xFFFF) && (val >= CS35L56_HALO_STATE_BOOT_DONE),
+				       CS35L56_HALO_STATE_POLL_US,
+				       CS35L56_HALO_STATE_TIMEOUT_US);
+
+	if ((ret < 0) && (ret != -ETIMEDOUT)) {
+		dev_err(cs35l56_base->dev, "Failed to read HALO_STATE: %d\n", ret);
+		return ret;
+	}
+
+	if ((ret == -ETIMEDOUT) || (val != CS35L56_HALO_STATE_BOOT_DONE)) {
+		dev_err(cs35l56_base->dev, "Firmware boot fail: HALO_STATE=%#x\n", val);
+		return -EIO;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_wait_for_firmware_boot, SND_SOC_CS35L56_SHARED);
+
+void cs35l56_wait_min_reset_pulse(void)
+{
+	/* Satisfy minimum reset pulse width spec */
+	usleep_range(CS35L56_RESET_PULSE_MIN_US, 2 * CS35L56_RESET_PULSE_MIN_US);
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_wait_min_reset_pulse, SND_SOC_CS35L56_SHARED);
+
+static const struct reg_sequence cs35l56_system_reset_seq[] = {
+	REG_SEQ0(CS35L56_DSP_VIRTUAL1_MBOX_1, CS35L56_MBOX_CMD_SYSTEM_RESET),
+};
+
+void cs35l56_system_reset(struct cs35l56_base *cs35l56_base, bool is_soundwire)
+{
+	/*
+	 * Must enter cache-only first so there can't be any more register
+	 * accesses other than the controlled system reset sequence below.
+	 */
+	regcache_cache_only(cs35l56_base->regmap, true);
+	regmap_multi_reg_write_bypassed(cs35l56_base->regmap,
+					cs35l56_system_reset_seq,
+					ARRAY_SIZE(cs35l56_system_reset_seq));
+
+	/* On SoundWire the registers won't be accessible until it re-enumerates. */
+	if (is_soundwire)
+		return;
+
+	usleep_range(CS35L56_CONTROL_PORT_READY_US, CS35L56_CONTROL_PORT_READY_US + 400);
+	regcache_cache_only(cs35l56_base->regmap, false);
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_system_reset, SND_SOC_CS35L56_SHARED);
+
+int cs35l56_irq_request(struct cs35l56_base *cs35l56_base, int irq)
+{
+	int ret;
+
+	if (!irq)
+		return 0;
+
+	ret = devm_request_threaded_irq(cs35l56_base->dev, irq, NULL, cs35l56_irq,
+					IRQF_ONESHOT | IRQF_SHARED | IRQF_TRIGGER_LOW,
+					"cs35l56", cs35l56_base);
+	if (!ret)
+		cs35l56_base->irq = irq;
+	else
+		dev_err(cs35l56_base->dev, "Failed to get IRQ: %d\n", ret);
+
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_irq_request, SND_SOC_CS35L56_SHARED);
+
+irqreturn_t cs35l56_irq(int irq, void *data)
+{
+	struct cs35l56_base *cs35l56_base = data;
+	unsigned int status1 = 0, status8 = 0, status20 = 0;
+	unsigned int mask1, mask8, mask20;
+	unsigned int val;
+	int rv;
+
+	irqreturn_t ret = IRQ_NONE;
+
+	if (!cs35l56_base->init_done)
+		return IRQ_NONE;
+
+	mutex_lock(&cs35l56_base->irq_lock);
+
+	rv = pm_runtime_resume_and_get(cs35l56_base->dev);
+	if (rv < 0) {
+		dev_err(cs35l56_base->dev, "irq: failed to get pm_runtime: %d\n", rv);
+		goto err_unlock;
+	}
+
+	regmap_read(cs35l56_base->regmap, CS35L56_IRQ1_STATUS, &val);
+	if ((val & CS35L56_IRQ1_STS_MASK) == 0) {
+		dev_dbg(cs35l56_base->dev, "Spurious IRQ: no pending interrupt\n");
+		goto err;
+	}
+
+	/* Ack interrupts */
+	regmap_read(cs35l56_base->regmap, CS35L56_IRQ1_EINT_1, &status1);
+	regmap_read(cs35l56_base->regmap, CS35L56_IRQ1_MASK_1, &mask1);
+	status1 &= ~mask1;
+	regmap_write(cs35l56_base->regmap, CS35L56_IRQ1_EINT_1, status1);
+
+	regmap_read(cs35l56_base->regmap, CS35L56_IRQ1_EINT_8, &status8);
+	regmap_read(cs35l56_base->regmap, CS35L56_IRQ1_MASK_8, &mask8);
+	status8 &= ~mask8;
+	regmap_write(cs35l56_base->regmap, CS35L56_IRQ1_EINT_8, status8);
+
+	regmap_read(cs35l56_base->regmap, CS35L56_IRQ1_EINT_20, &status20);
+	regmap_read(cs35l56_base->regmap, CS35L56_IRQ1_MASK_20, &mask20);
+	status20 &= ~mask20;
+	/* We don't want EINT20 but they default to unmasked: force mask */
+	regmap_write(cs35l56_base->regmap, CS35L56_IRQ1_MASK_20, 0xffffffff);
+
+	dev_dbg(cs35l56_base->dev, "%s: %#x %#x\n", __func__, status1, status8);
+
+	/* Check to see if unmasked bits are active */
+	if (!status1 && !status8 && !status20)
+		goto err;
+
+	if (status1 & CS35L56_AMP_SHORT_ERR_EINT1_MASK)
+		dev_crit(cs35l56_base->dev, "Amp short error\n");
+
+	if (status8 & CS35L56_TEMP_ERR_EINT1_MASK)
+		dev_crit(cs35l56_base->dev, "Overtemp error\n");
+
+	ret = IRQ_HANDLED;
+
+err:
+	pm_runtime_put(cs35l56_base->dev);
+err_unlock:
+	mutex_unlock(&cs35l56_base->irq_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_irq, SND_SOC_CS35L56_SHARED);
+
+int cs35l56_is_fw_reload_needed(struct cs35l56_base *cs35l56_base)
+{
+	unsigned int val;
+	int ret;
+
+	/* Nothing to re-patch if we haven't done any patching yet. */
+	if (!cs35l56_base->fw_patched)
+		return false;
+
+	/*
+	 * If we have control of RESET we will have asserted it so the firmware
+	 * will need re-patching.
+	 */
+	if (cs35l56_base->reset_gpio)
+		return true;
+
+	/*
+	 * In secure mode FIRMWARE_MISSING is cleared by the BIOS loader so
+	 * can't be used here to test for memory retention.
+	 * Assume that tuning must be re-loaded.
+	 */
+	if (cs35l56_base->secured)
+		return true;
+
+	ret = pm_runtime_resume_and_get(cs35l56_base->dev);
+	if (ret) {
+		dev_err(cs35l56_base->dev, "Failed to runtime_get: %d\n", ret);
+		return ret;
+	}
+
+	ret = regmap_read(cs35l56_base->regmap, CS35L56_PROTECTION_STATUS, &val);
+	if (ret)
+		dev_err(cs35l56_base->dev, "Failed to read PROTECTION_STATUS: %d\n", ret);
+	else
+		ret = !!(val & CS35L56_FIRMWARE_MISSING);
+
+	pm_runtime_put_autosuspend(cs35l56_base->dev);
+
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_is_fw_reload_needed, SND_SOC_CS35L56_SHARED);
+
 const struct cs_dsp_region cs35l56_dsp1_regions[] = {
 	{ .type = WMFW_HALO_PM_PACKED,	.base = CS35L56_DSP1_PMEM_0 },
 	{ .type = WMFW_HALO_XM_PACKED,	.base = CS35L56_DSP1_XMEM_PACKED_0 },