@@ -2293,6 +2293,35 @@ config MCP_UCB1200_TS
endmenu
+config MFD_CS40L26_CORE
+ tristate
+ select MFD_CORE
+ select FW_CS_DSP
+
+config MFD_CS40L26_I2C
+ tristate "Cirrus Logic CS40L26 (I2C)"
+ select REGMAP_I2C
+ select MFD_CS40L26_CORE
+ depends on I2C
+ help
+ Select this to support the Cirrus Logic CS40L26 Haptic
+ Driver over I2C.
+
+ This driver can be built as a module. If built as a module it will be
+ called "cs40l26-i2c".
+
+config MFD_CS40L26_SPI
+ tristate "Cirrus Logic CS40L26 (SPI)"
+ select REGMAP_SPI
+ select MFD_CS40L26_CORE
+ depends on SPI
+ help
+ Select this to support the Cirrus Logic CS40L26 Haptic
+ Driver over SPI.
+
+ This driver can be built as a module. If built as a module it will be
+ called "cs40l26-spi".
+
config MFD_CS40L50_CORE
tristate
select MFD_CORE
@@ -90,6 +90,10 @@ obj-$(CONFIG_MFD_MADERA) += madera.o
obj-$(CONFIG_MFD_MADERA_I2C) += madera-i2c.o
obj-$(CONFIG_MFD_MADERA_SPI) += madera-spi.o
+obj-$(CONFIG_MFD_CS40L26_CORE) += cs40l26-core.o
+obj-$(CONFIG_MFD_CS40L26_I2C) += cs40l26-i2c.o
+obj-$(CONFIG_MFD_CS40L26_SPI) += cs40l26-spi.o
+
obj-$(CONFIG_MFD_CS40L50_CORE) += cs40l50-core.o
obj-$(CONFIG_MFD_CS40L50_I2C) += cs40l50-i2c.o
obj-$(CONFIG_MFD_CS40L50_SPI) += cs40l50-spi.o
new file mode 100644
@@ -0,0 +1,1412 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CS40L26 Advanced Haptic Driver with waveform memory,
+ * integrated DSP, and closed-loop algorithms
+ *
+ * Copyright 2025 Cirrus Logic, Inc.
+ *
+ * Author: Fred Treven <ftreven@opensource.cirrus.com>
+ */
+
+#include <linux/cleanup.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/cs40l26.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+
+static const struct mfd_cell cs40l26_devs[] = {
+ { .name = "cs40l26-codec", },
+ { .name = "cs40l26-vibra", },
+};
+
+const struct regmap_config cs40l26_regmap = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .reg_format_endian = REGMAP_ENDIAN_BIG,
+ .val_format_endian = REGMAP_ENDIAN_BIG,
+ .max_register = CS40L26_LASTREG,
+ .cache_type = REGCACHE_NONE,
+};
+EXPORT_SYMBOL_GPL(cs40l26_regmap);
+
+static const char *const cs40l26_supplies[] = {
+ "va", "vp",
+};
+
+inline void cs40l26_pm_exit(struct device *dev)
+{
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+}
+EXPORT_SYMBOL_GPL(cs40l26_pm_exit);
+
+static int cs40l26_fw_write_raw(struct cs_dsp *dsp, const char *const name,
+ const unsigned int algo_id, const u32 offset_words,
+ const size_t len_words, u32 *buf)
+{
+ struct cs_dsp_coeff_ctl *ctl;
+ __be32 *val;
+ int i, ret;
+
+ ctl = cs_dsp_get_ctl(dsp, name, WMFW_ADSP2_XM, algo_id);
+ if (!ctl) {
+ dev_err(dsp->dev, "Failed to find FW control %s\n", name);
+ return -EINVAL;
+ }
+
+ val = kzalloc(len_words * sizeof(u32), GFP_KERNEL);
+ if (!val)
+ return -ENOMEM;
+
+ for (i = 0; i < len_words; i++)
+ val[i] = cpu_to_be32(buf[i]);
+
+ ret = cs_dsp_coeff_write_ctrl(ctl, offset_words, val, len_words * sizeof(u32));
+ if (ret < 0)
+ dev_err(dsp->dev, "Failed to write FW control %s\n", name);
+
+ kfree(val);
+
+ return (ret < 0) ? ret : 0;
+}
+
+inline int cs40l26_fw_write(struct cs_dsp *dsp, const char *const name, const unsigned int algo_id,
+ u32 val)
+{
+ return cs40l26_fw_write_raw(dsp, name, algo_id, 0, 1, &val);
+}
+EXPORT_SYMBOL_GPL(cs40l26_fw_write);
+
+static int cs40l26_fw_read_raw(struct cs_dsp *dsp, const char *const name,
+ const unsigned int algo_id, const unsigned int offset_words,
+ const size_t len_words, u32 *buf)
+{
+ struct cs_dsp_coeff_ctl *ctl;
+ int i, ret;
+
+ ctl = cs_dsp_get_ctl(dsp, name, WMFW_ADSP2_XM, algo_id);
+ if (!ctl) {
+ dev_err(dsp->dev, "Failed to find FW control %s\n", name);
+ return -EINVAL;
+ }
+
+ ret = cs_dsp_coeff_read_ctrl(ctl, offset_words, buf, len_words * sizeof(u32));
+ if (ret) {
+ dev_err(dsp->dev, "Failed to read FW control %s\n", name);
+ return ret;
+ }
+
+ for (i = 0; i < len_words; i++)
+ buf[i] = be32_to_cpu(buf[i]);
+
+ return 0;
+}
+
+inline int cs40l26_fw_read(struct cs_dsp *dsp, const char *const name, const unsigned int algo_id,
+ u32 *buf)
+{
+ return cs40l26_fw_read_raw(dsp, name, algo_id, 0, 1, buf);
+}
+EXPORT_SYMBOL_GPL(cs40l26_fw_read);
+
+static struct cs40l26_irq *cs40l26_get_irq(struct cs40l26 *cs40l26, const int num, const int bit);
+
+static int cs40l26_gpio1_rise_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+
+ if (cs40l26->wksrc_sts & CS40L26_WKSRC_STS_EN)
+ dev_dbg(cs40l26->dev, "GPIO1 Rising Edge Detected\n");
+
+ cs40l26->wksrc_sts |= CS40L26_WKSRC_STS_EN;
+
+ return 0;
+}
+
+static int cs40l26_gpio1_fall_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+
+ if (cs40l26->wksrc_sts & CS40L26_WKSRC_STS_EN)
+ dev_dbg(cs40l26->dev, "GPIO1 Falling Edge Detected\n");
+
+ cs40l26->wksrc_sts |= CS40L26_WKSRC_STS_EN;
+
+ return 0;
+}
+
+static int cs40l26_wksrc_any_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+ u32 last_wksrc, pwrmgt_sts;
+ int ret;
+
+ guard(mutex)(&cs40l26->dsp.pwr_lock);
+
+ ret = regmap_read(cs40l26->regmap, CS40L26_PWRMGT_STS, &pwrmgt_sts);
+ if (ret)
+ return ret;
+
+ cs40l26->wksrc_sts = (u8)FIELD_GET(CS40L26_WKSRC_STS_MASK, pwrmgt_sts);
+
+ ret = cs40l26_fw_read(&cs40l26->dsp, "LAST_WAKESRC_CTL", cs40l26->dsp.fw_id, &last_wksrc);
+ if (ret)
+ return ret;
+
+ cs40l26->last_wksrc_pol = (u8)(last_wksrc & CS40L26_WKSRC_GPIO_POL_MASK);
+
+ return 0;
+}
+
+static int cs40l26_wksrc_gpio1_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+
+ /*
+ * The GPIO wakesource and event interrupts are not able to reliably determine
+ * the GPIO edge that triggered the interrupt (rising/falling).
+ *
+ * The driver must therefore perform this logic in order to determine the edge
+ * of the GPIO event for two cases:
+ * 1. The GPIO event is waking the device from hibernation.
+ * 2. The GPIO event occurs when the device is already awake.
+ */
+
+ if (cs40l26->wksrc_sts & cs40l26->last_wksrc_pol) {
+ dev_dbg(cs40l26->dev, "GPIO1 Falling Edge Detected\n");
+ cs40l26->wksrc_sts |= CS40L26_WKSRC_STS_EN;
+ } else {
+ dev_dbg(cs40l26->dev, "GPIO1 rising edge detected\n");
+ }
+
+ return 0;
+}
+
+static int cs40l26_error_release(struct cs40l26 *cs40l26, const enum cs40l26_error err)
+{
+ int ret;
+
+ dev_err(cs40l26->dev, "Device Reported Error: %u\n", (unsigned int)BIT(err));
+
+ ret = regmap_clear_bits(cs40l26->regmap, CS40L26_ERROR_RELEASE, BIT(err));
+ if (ret)
+ return ret;
+
+ ret = regmap_set_bits(cs40l26->regmap, CS40L26_ERROR_RELEASE, BIT(err));
+ if (ret)
+ return ret;
+
+ return regmap_clear_bits(cs40l26->regmap, CS40L26_ERROR_RELEASE, BIT(err));
+}
+
+static int cs40l26_bst_ovp_err_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+
+ return cs40l26_error_release(cs40l26, CS40L26_ERROR_BST_OVP);
+}
+
+static int cs40l26_bst_dcm_uvp_err_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+
+ return cs40l26_error_release(cs40l26, CS40L26_ERROR_BST_DCM_UVP);
+}
+
+static int cs40l26_bst_short_err_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+
+ return cs40l26_error_release(cs40l26, CS40L26_ERROR_BST_SHORT);
+}
+
+static int cs40l26_temp_warn_rise_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+
+ return cs40l26_error_release(cs40l26, CS40L26_ERROR_TEMP_WARN);
+}
+
+static int cs40l26_temp_err_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+
+ return cs40l26_error_release(cs40l26, CS40L26_ERROR_TEMP_ERR);
+}
+
+static int cs40l26_amp_short_err_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+
+ return cs40l26_error_release(cs40l26, CS40L26_ERROR_AMP_SHORT);
+}
+
+static int cs40l26_dsp_queue_buffer_read(struct cs40l26 *cs40l26, u32 *val)
+{
+ u32 queue_rd, queue_wt, sts;
+ int ret;
+
+ guard(mutex)(&cs40l26->dsp.pwr_lock);
+
+ ret = cs40l26_fw_read(&cs40l26->dsp, "QUEUE_WT", CS40L26_DSP_ALGO_ID, &queue_wt);
+ if (ret)
+ return ret;
+
+ ret = cs40l26_fw_read(&cs40l26->dsp, "QUEUE_RD", CS40L26_DSP_ALGO_ID, &queue_rd);
+ if (ret)
+ return ret;
+
+ if (queue_rd - sizeof(u32) == queue_wt) {
+ ret = cs40l26_fw_read(&cs40l26->dsp, "STATUS", CS40L26_DSP_ALGO_ID, &sts);
+ if (ret)
+ return ret;
+
+ if (sts) {
+ dev_err(cs40l26->dev, "DSP Queue Buffer is full, message(s) missed\n");
+ return -ENOSPC;
+ }
+ }
+
+ if (queue_rd == queue_wt) /* DSP Queue is Empty */
+ return 1;
+
+ ret = regmap_read(cs40l26->regmap, queue_rd, val);
+ if (ret)
+ return ret;
+
+ if (queue_rd == cs40l26->queue_last)
+ queue_rd = cs40l26->queue_base;
+ else
+ queue_rd += sizeof(u32);
+
+ return cs40l26_fw_write(&cs40l26->dsp, "QUEUE_RD", CS40L26_DSP_ALGO_ID, queue_rd);
+}
+
+static int cs40l26_dsp_queue_irq(void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+ bool end = false;
+ int ret;
+ u32 val;
+
+ ret = cs40l26_dsp_queue_buffer_read(cs40l26, &val);
+ if (ret == 1)
+ return 0;
+ else if (ret)
+ return ret;
+
+ while (!end) {
+ if ((val & CS40L26_DSP_CMD_INDEX_MASK) == CS40L26_DSP_PANIC) {
+ dev_err(cs40l26->dev, "DSP Panic! Error: 0x%06X\n",
+ (u32)(val & CS40L26_DSP_CMD_PAYLOAD_MASK));
+ return -ENOTRECOVERABLE;
+ }
+
+ switch (val) {
+ case CS40L26_DSP_COMPLETE_CP:
+ dev_dbg(cs40l26->dev, "DSP Queue: Control Port Haptics Completed\n");
+ break;
+ case CS40L26_DSP_COMPLETE_I2S:
+ dev_dbg(cs40l26->dev, "DSP Queue: I2S Stream Completed\n");
+ break;
+ case CS40L26_DSP_TRIGGER_CP:
+ dev_dbg(cs40l26->dev, "DSP Queue: Control Port Haptics Triggered\n");
+ break;
+ case CS40L26_DSP_TRIGGER_I2S:
+ dev_dbg(cs40l26->dev, "DSP Queue: I2S Stream Triggered\n");
+ break;
+ case CS40L26_DSP_PM_AWAKE:
+ cs40l26->wksrc_sts |= CS40L26_WKSRC_STS_EN;
+ dev_dbg(cs40l26->dev, "DSP Queue: AWAKE\n");
+ break;
+ case CS40L26_DSP_SYS_ACK:
+ dev_dbg(cs40l26->dev, "DSP Queue: Inbound PING received\n");
+ break;
+ default:
+ dev_err(cs40l26->dev, "DSP Queue value (0x%X) unrecognized\n", val);
+ return -EINVAL;
+ }
+
+ ret = cs40l26_dsp_queue_buffer_read(cs40l26, &val);
+ if (ret == 1)
+ end = true;
+ else if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct reg_sequence cs40l26_irq_masks[] = {
+ REG_SEQ0(CS40L26_IRQ1_MASK_1, CS40L26_IRQ_1_ALL_MASKED),
+ REG_SEQ0(CS40L26_IRQ1_MASK_2, CS40L26_IRQ_2_ALL_MASKED),
+};
+
+static void cs40l26_irq_unmask(struct cs40l26 *cs40l26, const int num, const int virq)
+{
+ struct cs40l26_irq *irq;
+
+ if (num != 1 && num != 2) {
+ dev_err(cs40l26->dev, "Invalid IRQ number %d\n", num);
+ return;
+ }
+
+ irq = cs40l26_get_irq(cs40l26, num, virq);
+ if (!irq)
+ return;
+
+ cs40l26->irq_masks[num - 1].def &= ~irq->mask;
+}
+
+static struct cs40l26_irq cs40l26_irqs_1[] = {
+ CS40L26_IRQ(GPIO1_RISE, "GPIO1 Rise", cs40l26_gpio1_rise_irq),
+ CS40L26_IRQ(GPIO1_FALL, "GPIO1 Fall", cs40l26_gpio1_fall_irq),
+ CS40L26_IRQ(WKSRC_STS_ANY, "ANY Wake", cs40l26_wksrc_any_irq),
+ CS40L26_IRQ(WKSRC_STS_GPIO1, "GPIO1 Wake", cs40l26_wksrc_gpio1_irq),
+ CS40L26_IRQ(WKSRC_STS_SPI, "SPI Wake", NULL),
+ CS40L26_IRQ(WKSRC_STS_I2C, "I2C Wake", NULL),
+ CS40L26_IRQ(BST_OVP_FLAG_RISE, "BST OVP Rise", NULL),
+ CS40L26_IRQ(BST_OVP_FLAG_FALL, "BST OVP Fall", NULL),
+ CS40L26_IRQ(BST_OVP_ERR, "BST OVP Error", cs40l26_bst_ovp_err_irq),
+ CS40L26_IRQ(BST_DCM_UVP_ERR, "BST UVP Error", cs40l26_bst_dcm_uvp_err_irq),
+ CS40L26_IRQ(BST_SHORT_ERR, "BST Short Error", cs40l26_bst_short_err_irq),
+ CS40L26_IRQ(BST_IPK_FLAG, "BST IPK Flag", NULL),
+ CS40L26_IRQ(TEMP_WARN_RISE, "TEMP Warn Rise", cs40l26_temp_warn_rise_irq),
+ CS40L26_IRQ(TEMP_WARN_FALL, "TEMP Warn Fall", NULL),
+ CS40L26_IRQ(TEMP_ERR, "TEMP Error", cs40l26_temp_err_irq),
+ CS40L26_IRQ(AMP_ERR, "AMP Error", cs40l26_amp_short_err_irq),
+ CS40L26_IRQ(DSP_RX_QUEUE, "DSP Rx", cs40l26_dsp_queue_irq),
+};
+
+static struct cs40l26_irq cs40l26_irqs_2[] = {
+ CS40L26_IRQ(REFCLK_PRESENT, "REFCLK Present", NULL),
+ CS40L26_IRQ(REFCLK_MISSING_FALL, "REFCLK Missing Fall", NULL),
+ CS40L26_IRQ(REFCLK_MISSING_RISE, "REFCLK Missing Rise", NULL),
+ CS40L26_IRQ(VPMON_CLIPPED, "VPMON Clipped", NULL),
+ CS40L26_IRQ(VBSTMON_CLIPPED, "VBSTMON Clipped", NULL),
+ CS40L26_IRQ(VMON_CLIPPED, "VMON Clipped", NULL),
+ CS40L26_IRQ(IMON_CLIPPED, "IMON Clipped", NULL),
+};
+
+static struct cs40l26_irq *cs40l26_get_irq(struct cs40l26 *cs40l26, const int num, const int bit)
+{
+ int i;
+
+ if (num == 1) {
+ for (i = 0; i < ARRAY_SIZE(cs40l26_irqs_1); i++) {
+ if (cs40l26_irqs_1[i].virq == bit)
+ return &cs40l26_irqs_1[i];
+ }
+ } else if (num == 2) {
+ for (i = 0; i < ARRAY_SIZE(cs40l26_irqs_2); i++) {
+ if (cs40l26_irqs_2[i].virq == bit)
+ return &cs40l26_irqs_2[i];
+ }
+ } else {
+ dev_err(cs40l26->dev, "Invalid IRQ number %d\n", num);
+ return NULL;
+ }
+
+ dev_err(cs40l26->dev, "Failed to find IRQ corresponding to bit in IRQ%d %d\n", bit, num);
+
+ return NULL;
+}
+
+static irqreturn_t cs40l26_irq_handler(int irq, void *data)
+{
+ struct cs40l26 *cs40l26 = data;
+ struct cs40l26_irq *irq_s;
+ unsigned long handle_bits;
+ u32 eint, mask, sts;
+ int i, j, ret;
+
+ if (pm_runtime_resume_and_get(cs40l26->dev)) {
+ dev_err(cs40l26->dev, "Failed to exit hibernate to service interrupt\n");
+ return IRQ_NONE;
+ }
+
+ guard(mutex)(&cs40l26->lock);
+
+ ret = regmap_read(cs40l26->regmap, CS40L26_IRQ1_STATUS, &sts);
+ if (ret)
+ goto err_pm;
+
+ if (!(sts & CS40L26_IRQ_STATUS_ASSERT)) {
+ dev_err(cs40l26->dev, "IRQ1 asserted with no pending interrupts\n");
+ ret = -EIO;
+ goto err_pm;
+ }
+
+ for (j = 0; j < 2; j++) {
+ ret = regmap_read(cs40l26->regmap, CS40L26_IRQ1_MASK_1 + j * 4, &mask);
+ if (ret)
+ goto err_pm;
+
+ ret = regmap_read(cs40l26->regmap, CS40L26_IRQ1_EINT_1 + j * 4, &eint);
+ if (ret)
+ goto err_pm;
+
+ handle_bits = eint & ~mask;
+
+ for_each_set_bit(i, &handle_bits, j ? CS40L26_IRQ_2_NBITS : CS40L26_IRQ_1_NBITS) {
+ irq_s = cs40l26_get_irq(cs40l26, j + 1, i);
+ if (!irq_s)
+ continue;
+
+ dev_dbg(cs40l26->dev, "%s", irq_s->name);
+
+ if (irq_s->handler) {
+ ret = irq_s->handler(cs40l26);
+ if (ret)
+ goto err_pm;
+ }
+
+ ret = regmap_write(cs40l26->regmap, CS40L26_IRQ1_EINT_1 + j * 4, BIT(i));
+ if (ret)
+ goto err_pm;
+ }
+ }
+
+err_pm:
+ cs40l26_pm_exit(cs40l26->dev);
+
+ return IRQ_RETVAL(ret);
+}
+
+int cs40l26_dsp_write(struct cs40l26 *cs40l26, const u32 val)
+{
+ int i, ret;
+ u32 ack;
+
+ /* Device NAKs if hibernating, so retry if this is the case */
+ for (i = 0; i < CS40L26_DSP_TIMEOUT_COUNT; i++) {
+ ret = regmap_write(cs40l26->regmap, CS40L26_DSP_QUEUE, val);
+ if (!ret)
+ break;
+
+ usleep_range(CS40L26_DSP_POLL_US, CS40L26_DSP_POLL_US + 100);
+ }
+
+ if (i == CS40L26_DSP_TIMEOUT_COUNT) {
+ dev_err(cs40l26->dev, "Timed out writing %#X to DSP\n", val);
+ return -ETIMEDOUT;
+ }
+
+ ret = regmap_read_poll_timeout(cs40l26->regmap, CS40L26_DSP_QUEUE, ack, !ack,
+ CS40L26_DSP_POLL_US,
+ CS40L26_DSP_POLL_US * CS40L26_DSP_TIMEOUT_COUNT);
+ if (ret)
+ dev_err(cs40l26->dev, "DSP failed to ACK %#X: %d\n", val, ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cs40l26_dsp_write);
+
+int cs40l26_dsp_state_get(struct cs40l26 *cs40l26, u32 *state)
+{
+ u32 dsp_state = CS40L26_DSP_STATE_NONE;
+ int i, ret;
+
+ if (cs40l26->dsp.running) {
+ for (i = 0; i < CS40L26_DSP_TIMEOUT_COUNT; i++) {
+ ret = cs40l26_fw_read(&cs40l26->dsp, "PM_CUR_STATE", CS40L26_PM_ALGO_ID,
+ &dsp_state);
+ if (ret)
+ return ret;
+
+ if (dsp_state != CS40L26_DSP_STATE_NONE)
+ break;
+
+ usleep_range(CS40L26_DSP_POLL_US, CS40L26_DSP_POLL_US + 100);
+ }
+
+ if (i == CS40L26_DSP_TIMEOUT_COUNT) {
+ dev_err(cs40l26->dev, "Timed out reading PM_CUR_STATE\n");
+ return -ETIMEDOUT;
+ }
+ } else {
+ ret = regmap_read_poll_timeout(cs40l26->regmap,
+ cs40l26->variant->info->pm_cur_state, dsp_state,
+ dsp_state != CS40L26_DSP_STATE_NONE,
+ CS40L26_DSP_POLL_US,
+ CS40L26_DSP_POLL_US * CS40L26_DSP_TIMEOUT_COUNT);
+ if (ret) {
+ dev_err(cs40l26->dev, "Failed to read poll for static PM_CUR_STATE\n");
+ return ret;
+ }
+ }
+
+ *state = dsp_state;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cs40l26_dsp_state_get);
+
+static bool cs40l26_dsp_can_run(struct cs40l26 *cs40l26)
+{
+ struct regmap *regmap = cs40l26->regmap;
+ u32 dsp_state, pm_state_locks;
+ int ret;
+
+ ret = cs40l26_dsp_state_get(cs40l26, &dsp_state);
+ if (ret)
+ return false;
+
+ if (dsp_state == CS40L26_DSP_STATE_ACTIVE)
+ return true;
+
+ if (dsp_state != CS40L26_DSP_STATE_STANDBY) {
+ dev_err(cs40l26->dev, "DSP in bad state: %u\n", dsp_state);
+ return false;
+ }
+
+ if (cs40l26->dsp.running)
+ ret = cs40l26_fw_read_raw(&cs40l26->dsp, "PM_STATE_LOCKS", CS40L26_PM_ALGO_ID,
+ CS40L26_DSP_LOCK3_OFFSET_WORDS, 1, &pm_state_locks);
+ else
+ ret = regmap_read(regmap, cs40l26->variant->info->pm_state_locks3, &pm_state_locks);
+
+ if (ret) {
+ dev_err(cs40l26->dev, "Failed to read PM_STATE_LOCKS\n");
+ return false;
+ }
+
+ return pm_state_locks & CS40L26_DSP_LOCK3_MASK;
+}
+
+static int cs40l26_prevent_hiber(struct cs40l26 *cs40l26)
+{
+ int i, ret;
+
+ for (i = 0; i < CS40L26_DSP_TIMEOUT_COUNT; i++) {
+ ret = cs40l26_dsp_write(cs40l26, CS40L26_DSP_CMD_PREVENT_HIBER);
+ if (ret)
+ return ret;
+
+ usleep_range(CS40L26_DSP_POLL_US, CS40L26_DSP_POLL_US + 100);
+
+ if (cs40l26_dsp_can_run(cs40l26))
+ break;
+ }
+
+ if (i == CS40L26_DSP_TIMEOUT_COUNT) {
+ dev_err(cs40l26->dev, "Failed to prevent hibernation\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int cs40l26_lbst_short_test(struct cs40l26 *cs40l26)
+{
+ u32 err, vbst_ctl_1, vbst_ctl_2;
+ int ret;
+
+ /* Read initial values to restore after test is complete */
+ ret = regmap_read(cs40l26->regmap, CS40L26_VBST_CTL_2, &vbst_ctl_2);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(cs40l26->regmap, CS40L26_VBST_CTL_1, &vbst_ctl_1);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(cs40l26->regmap, CS40L26_VBST_CTL_2, CS40L26_BST_CTL_SEL_MASK,
+ CS40L26_BST_CTL_SEL_FIXED);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(cs40l26->regmap, CS40L26_VBST_CTL_1, CS40L26_BST_CTL_MASK,
+ CS40L26_BST_CTL_VP);
+ if (ret)
+ return ret;
+
+ ret = regmap_set_bits(cs40l26->regmap, CS40L26_GLOBAL_ENABLES, CS40L26_GLOBAL_EN);
+ if (ret)
+ return ret;
+
+ /* Wait for boost converter to power up */
+ usleep_range(CS40L26_BST_TIME_US, CS40L26_BST_TIME_US + 100);
+
+ ret = regmap_read(cs40l26->regmap, CS40L26_ERROR_RELEASE, &err);
+ if (ret)
+ return ret;
+
+ if (err & BIT(CS40L26_ERROR_BST_SHORT)) {
+ dev_err(cs40l26->dev, "Boost shorted at startup\n");
+ return -ENOTRECOVERABLE;
+ }
+
+ /* Return to previous state before test */
+ ret = regmap_clear_bits(cs40l26->regmap, CS40L26_GLOBAL_ENABLES, CS40L26_GLOBAL_EN);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(cs40l26->regmap, CS40L26_VBST_CTL_1, vbst_ctl_1);
+ if (ret)
+ return ret;
+
+ return regmap_write(cs40l26->regmap, CS40L26_VBST_CTL_2, vbst_ctl_2);
+}
+
+static const struct reg_sequence cs40l26_a1_b1_errata[] = {
+ { CS40L26_PLL_REFCLK_DETECT_0, CS40L26_PLL_REFCLK_DET_DISABLE },
+ { 0x00000040, 0x00000055 },
+ { 0x00000040, 0x000000AA },
+ { CS40L26_TEST_LBST, CS40L26_DISABLE_EXPL_MODE },
+};
+
+static int cs40l26_a1_b1_handle_errata(struct cs40l26 *cs40l26)
+{
+ int ret;
+
+ /*
+ * Boost Exploratory Mode must be disabled on 0xA1/0xB1 devices in order to ensure there is
+ * no unintentional damage to the boost inductor. Any boost short that occurs after the
+ * LBST short test at probe will not be detected.
+ */
+ ret = cs40l26_lbst_short_test(cs40l26);
+ if (ret)
+ return ret;
+
+ ret = regmap_multi_reg_write(cs40l26->regmap, cs40l26_a1_b1_errata,
+ ARRAY_SIZE(cs40l26_a1_b1_errata));
+ if (ret)
+ return ret;
+
+ return cs_dsp_wseq_multi_write(&cs40l26->dsp, &cs40l26->wseqs[CS40L26_WSEQ_POWER_ON],
+ cs40l26_a1_b1_errata, ARRAY_SIZE(cs40l26_a1_b1_errata),
+ CS_DSP_WSEQ_FULL, false);
+}
+
+static const struct cs40l26_variant_info cs40l26_a1_b1_info = {
+ .pm_cur_state = CS40L26_A1_B1_PM_CUR_STATE,
+ .pm_state_locks = CS40L26_A1_B1_PM_STATE_LOCKS,
+ .pm_state_locks3 = CS40L26_A1_B1_PM_STATE_LOCKS3,
+ .pm_stdby_ticks = CS40L26_A1_B1_PM_STDBY_TICKS,
+ .pm_active_ticks = CS40L26_A1_B1_PM_ACTIVE_TICKS,
+ .halo_state = CS40L26_A1_B1_HALO_STATE,
+ .event_map_1 = CS40L26_A1_B1_EVENT_MAP_1,
+ .event_map_2 = CS40L26_A1_B1_EVENT_MAP_2,
+ .fw_min_rev = CS40L26_FW_A1_B1_MIN_REV,
+ .ram_ext_algo_id = CS40L26_EXT_ALGO_ID,
+ .vibegen_algo_id = CS40L26_VIBEGEN_ALGO_ID_A1,
+};
+
+static const struct cs40l26_variant_info cs40l26_b2_info = {
+ .pm_cur_state = CS40L26_B2_PM_CUR_STATE,
+ .pm_state_locks = CS40L26_B2_PM_STATE_LOCKS,
+ .pm_state_locks3 = CS40L26_B2_PM_STATE_LOCKS3,
+ .pm_stdby_ticks = CS40L26_B2_PM_STDBY_TICKS,
+ .pm_active_ticks = CS40L26_B2_PM_ACTIVE_TICKS,
+ .halo_state = CS40L26_B2_HALO_STATE,
+ .event_map_1 = CS40L26_B2_EVENT_MAP_1,
+ .event_map_2 = CS40L26_B2_EVENT_MAP_2,
+ .fw_min_rev = CS40L26_FW_B2_MIN_REV,
+ .ram_ext_algo_id = CS40L26_FW_ID,
+ .vibegen_algo_id = CS40L26_VIBEGEN_ALGO_ID_B2,
+};
+
+static const struct cs40l26_variant cs40l26_a1_b1_variant = {
+ .info = &cs40l26_a1_b1_info,
+ .handle_errata = &cs40l26_a1_b1_handle_errata,
+};
+
+static const struct cs40l26_variant cs40l26_b2_variant = {
+ .info = &cs40l26_b2_info,
+ .handle_errata = NULL,
+};
+
+static inline int cs40l26_pm_timeout_ms_set(struct cs40l26 *cs40l26, const u32 dsp_state,
+ const u32 timeout_ms)
+{
+ return regmap_write(cs40l26->regmap,
+ dsp_state == CS40L26_DSP_STATE_STANDBY ?
+ cs40l26->variant->info->pm_stdby_ticks :
+ cs40l26->variant->info->pm_active_ticks,
+ (timeout_ms * CS40L26_PM_TICKS_PER_SEC) / 1000);
+}
+
+static int cs40l26_pm_timeout_ms_get(struct cs40l26 *cs40l26, const u32 dsp_state, u32 *timeout_ms)
+{
+ u32 timeout_ticks;
+ int ret;
+
+ ret = regmap_read(cs40l26->regmap,
+ dsp_state == CS40L26_DSP_STATE_STANDBY ?
+ cs40l26->variant->info->pm_stdby_ticks :
+ cs40l26->variant->info->pm_active_ticks,
+ &timeout_ticks);
+ if (ret)
+ return ret;
+
+ *timeout_ms = DIV_ROUND_UP(timeout_ticks * 1000, CS40L26_PM_TICKS_PER_SEC);
+
+ return 0;
+}
+
+static int cs40l26_pm_runtime_setup(struct device *dev)
+{
+ int ret;
+
+ pm_runtime_set_autosuspend_delay(dev, CS40L26_AUTOSUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_get_noresume(dev);
+ ret = pm_runtime_set_active(dev);
+ if (ret)
+ return ret;
+
+ return devm_pm_runtime_enable(dev);
+}
+
+static int cs40l26_dsp_pre_config(struct cs40l26 *cs40l26)
+{
+ u32 dsp_state, halo_state, timeout_ms;
+ int i, ret;
+
+ ret = regmap_read(cs40l26->regmap, cs40l26->variant->info->halo_state, &halo_state);
+ if (ret)
+ return ret;
+
+ if (halo_state != CS40L26_DSP_HALO_STATE_RUN) {
+ dev_err(cs40l26->dev, "Invalid DSP state: %u\n", halo_state);
+ return -EINVAL;
+ }
+
+ ret = cs40l26_pm_timeout_ms_get(cs40l26, CS40L26_DSP_STATE_ACTIVE, &timeout_ms);
+ if (ret) {
+ dev_err(cs40l26->dev, "Failed to get ACTIVE timeout\n");
+ return ret;
+ }
+
+ for (i = 0; i < CS40L26_DSP_STATE_TIMEOUT_COUNT; i++) {
+ ret = cs40l26_dsp_state_get(cs40l26, &dsp_state);
+ if (ret)
+ return ret;
+
+ if (dsp_state != CS40L26_DSP_STATE_SHUTDOWN &&
+ dsp_state != CS40L26_DSP_STATE_STANDBY)
+ dev_warn(cs40l26->dev, "DSP core not safe to kill\n");
+ else
+ break;
+
+ usleep_range(timeout_ms * 1000, (timeout_ms * 1000) + 100);
+ }
+
+ if (i == CS40L26_DSP_STATE_TIMEOUT_COUNT) {
+ dev_err(cs40l26->dev, "DSP Core could not be shut down\n");
+ return -ETIMEDOUT;
+ }
+
+ return regmap_write(cs40l26->regmap, CS40L26_DSP1_CCM_CORE_CONTROL,
+ CS40L26_DSP_CCM_CORE_KILL);
+}
+
+static const struct cs_dsp_region cs40l26_dsp_regions[] = {
+ { .type = WMFW_HALO_PM_PACKED, .base = CS40L26_DSP1_PMEM_0 },
+ { .type = WMFW_HALO_XM_PACKED, .base = CS40L26_DSP1_XMEM_PACKED_0 },
+ { .type = WMFW_HALO_YM_PACKED, .base = CS40L26_DSP1_YMEM_PACKED_0 },
+ { .type = WMFW_ADSP2_XM, .base = CS40L26_DSP1_XMEM_UNPACKED24_0 },
+ { .type = WMFW_ADSP2_YM, .base = CS40L26_DSP1_YMEM_UNPACKED24_0 },
+};
+
+static int cs40l26_get_model(struct cs40l26 *cs40l26)
+{
+ int ret;
+
+ ret = regmap_read(cs40l26->regmap, CS40L26_DEVID, &cs40l26->devid);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(cs40l26->regmap, CS40L26_REVID, &cs40l26->revid);
+ if (ret)
+ return ret;
+
+ switch (cs40l26->devid) {
+ case CS40L26_DEVID_L26:
+ if (cs40l26->revid != CS40L26_REVID_A1 && cs40l26->revid != CS40L26_REVID_B1)
+ goto err;
+
+ cs40l26->variant = &cs40l26_a1_b1_variant;
+ break;
+ case CS40L26_DEVID_L27:
+ if (cs40l26->revid != CS40L26_REVID_B2)
+ goto err;
+
+ cs40l26->variant = &cs40l26_b2_variant;
+ break;
+ default:
+ dev_err(cs40l26->dev, "Invalid device ID 0x%06X\n", cs40l26->devid);
+ return -EINVAL;
+ }
+
+ dev_info(cs40l26->dev, "Cirrus Logic CS40L26 ID: 0x%06X, Revision: 0x%02X\n",
+ cs40l26->devid, cs40l26->revid);
+
+ return 0;
+
+err:
+ dev_err(cs40l26->dev, "Invalid revision 0x%02X for device 0x%06X\n", cs40l26->revid,
+ cs40l26->devid);
+ return -EINVAL;
+}
+
+int cs40l26_set_pll_loop(struct cs40l26 *cs40l26, const u32 pll_loop)
+{
+ int i;
+
+ /* Retry in case DSP is hibernating */
+ for (i = 0; i < CS40L26_PLL_NUM_SET_ATTEMPTS; i++) {
+ if (!regmap_update_bits(cs40l26->regmap, CS40L26_REFCLK_INPUT,
+ CS40L26_PLL_REFCLK_LOOP_MASK,
+ pll_loop << CS40L26_PLL_REFCLK_LOOP_SHIFT))
+ break;
+ }
+
+ if (i == CS40L26_PLL_NUM_SET_ATTEMPTS) {
+ dev_err(cs40l26->dev, "Failed to configure PLL\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cs40l26_set_pll_loop);
+
+static int cs40l26_wseq_init(struct cs40l26 *cs40l26)
+{
+ struct cs_dsp *dsp = &cs40l26->dsp;
+
+ cs40l26->wseqs[CS40L26_WSEQ_POWER_ON].ctl =
+ cs_dsp_get_ctl(dsp, "POWER_ON_SEQUENCE", WMFW_ADSP2_XM, CS40L26_PM_ALGO_ID);
+ if (!cs40l26->wseqs[CS40L26_WSEQ_POWER_ON].ctl) {
+ dev_err(cs40l26->dev, "POWER_ON write sequence not found\n");
+ return -EINVAL;
+ }
+
+ cs40l26->wseqs[CS40L26_WSEQ_ACTIVE].ctl =
+ cs_dsp_get_ctl(dsp, "ACTIVE_SEQUENCE", WMFW_ADSP2_XM, CS40L26_PM_ALGO_ID);
+ if (!cs40l26->wseqs[CS40L26_WSEQ_ACTIVE].ctl) {
+ dev_err(cs40l26->dev, "ACTIVE write sequence not found\n");
+ return -EINVAL;
+ }
+
+ cs40l26->wseqs[CS40L26_WSEQ_STANDBY].ctl =
+ cs_dsp_get_ctl(dsp, "STANDBY_SEQUENCE", WMFW_ADSP2_XM, CS40L26_PM_ALGO_ID);
+ if (!cs40l26->wseqs[CS40L26_WSEQ_STANDBY].ctl) {
+ dev_err(cs40l26->dev, "STANDBY write sequence not found\n");
+ return -EINVAL;
+ }
+
+ return cs_dsp_wseq_init(dsp, cs40l26->wseqs, CS40L26_NUM_WSEQS);
+}
+
+static int cs40l26_wksrc_config(struct cs40l26 *cs40l26)
+{
+ u32 wksrc;
+ int ret;
+
+ if (!strncmp(cs40l26->bus->name, "spi", strlen(cs40l26->bus->name))) {
+ cs40l26_irq_unmask(cs40l26, 1, CS40L26_IRQ_WKSRC_STS_SPI);
+ wksrc = CS40L26_WKSRC_POL_SPI | CS40L26_WKSRC_EN_SPI;
+ } else if (!strncmp(cs40l26->bus->name, "i2c", strlen(cs40l26->bus->name))) {
+ cs40l26_irq_unmask(cs40l26, 1, CS40L26_IRQ_WKSRC_STS_I2C);
+ wksrc = CS40L26_WKSRC_EN_I2C;
+ } else {
+ dev_err(cs40l26->dev, "Invalid bus type\n");
+ return -EINVAL;
+ }
+
+ cs40l26_irq_unmask(cs40l26, 1, CS40L26_IRQ_WKSRC_STS_GPIO1);
+ cs40l26_irq_unmask(cs40l26, 1, CS40L26_IRQ_WKSRC_STS_ANY);
+
+ ret = regmap_write(cs40l26->regmap, CS40L26_WAKESRC_CTL, wksrc);
+ if (ret)
+ return ret;
+
+ return cs_dsp_wseq_write(&cs40l26->dsp, &cs40l26->wseqs[CS40L26_WSEQ_POWER_ON],
+ CS40L26_WAKESRC_CTL, wksrc, CS_DSP_WSEQ_L16, true);
+}
+
+static inline void cs40l26_gpio_config(struct cs40l26 *cs40l26)
+{
+ cs40l26_irq_unmask(cs40l26, 1, CS40L26_IRQ_GPIO1_RISE);
+ cs40l26_irq_unmask(cs40l26, 1, CS40L26_IRQ_GPIO1_FALL);
+}
+
+static int cs40l26_bst_ipk_config(struct cs40l26 *cs40l26)
+{
+ u32 bst_ipk;
+ int ret;
+
+ bst_ipk = (clamp_val(cs40l26->bst_ipk_ua, CS40L26_BST_IPK_UA_MIN, CS40L26_BST_IPK_UA_MAX) -
+ CS40L26_BST_IPK_UA_OFFSET) / CS40L26_BST_IPK_UA_STEP;
+
+ cs40l26_irq_unmask(cs40l26, 1, CS40L26_IRQ_BST_IPK_FLAG);
+
+ ret = regmap_write(cs40l26->regmap, CS40L26_BST_IPK_CTL, bst_ipk);
+ if (ret)
+ return ret;
+
+ return cs_dsp_wseq_write(&cs40l26->dsp, &cs40l26->wseqs[CS40L26_WSEQ_POWER_ON],
+ CS40L26_BST_IPK_CTL, bst_ipk, CS_DSP_WSEQ_L16, true);
+}
+
+static int cs40l26_bst_ctl_config(struct cs40l26 *cs40l26)
+{
+ u32 bst_ctl, bst_ctl_lim;
+ int ret;
+
+ ret = regmap_read(cs40l26->regmap, CS40L26_VBST_CTL_2, &bst_ctl_lim);
+ if (ret)
+ return ret;
+
+ bst_ctl_lim |= FIELD_PREP(CS40L26_BST_CTL_LIM_EN_MASK, CS40L26_BST_CTL_LIM_EN);
+
+ ret = regmap_write(cs40l26->regmap, CS40L26_VBST_CTL_2, bst_ctl_lim);
+ if (ret)
+ return ret;
+
+ ret = cs_dsp_wseq_write(&cs40l26->dsp, &cs40l26->wseqs[CS40L26_WSEQ_POWER_ON],
+ CS40L26_VBST_CTL_2, bst_ctl_lim, CS_DSP_WSEQ_L16, true);
+ if (ret)
+ return ret;
+
+ bst_ctl = (clamp_val(cs40l26->vbst_uv, CS40L26_BST_UV_MIN, CS40L26_BST_UV_MAX) -
+ CS40L26_BST_UV_MIN) / CS40L26_BST_UV_STEP;
+
+ ret = regmap_write(cs40l26->regmap, CS40L26_VBST_CTL_1, bst_ctl);
+ if (ret)
+ return ret;
+
+ return cs_dsp_wseq_write(&cs40l26->dsp, &cs40l26->wseqs[CS40L26_WSEQ_POWER_ON],
+ CS40L26_VBST_CTL_1, bst_ctl, CS_DSP_WSEQ_L16, true);
+}
+
+static int cs40l26_irq_init(struct cs40l26 *cs40l26)
+{
+ int i, ret;
+
+ /* Unmask relevant warnings and error interrupts */
+ for (i = CS40L26_IRQ_BST_OVP_FLAG_RISE; i <= CS40L26_IRQ_AMP_ERR; i++)
+ cs40l26_irq_unmask(cs40l26, 1, i);
+
+ cs40l26_irq_unmask(cs40l26, 1, CS40L26_IRQ_DSP_RX_QUEUE);
+
+ for (i = CS40L26_IRQ_VPMON_CLIPPED; i <= CS40L26_IRQ_IMON_CLIPPED; i++)
+ cs40l26_irq_unmask(cs40l26, 2, i);
+
+ for (i = CS40L26_IRQ_REFCLK_PRESENT; i <= CS40L26_IRQ_REFCLK_MISSING_RISE; i++)
+ cs40l26_irq_unmask(cs40l26, 2, i);
+
+ ret = regmap_multi_reg_write(cs40l26->regmap, cs40l26_irq_masks, 2);
+ if (ret)
+ return ret;
+
+ ret = cs_dsp_wseq_multi_write(&cs40l26->dsp, &cs40l26->wseqs[CS40L26_WSEQ_POWER_ON],
+ cs40l26_irq_masks, 2, CS_DSP_WSEQ_FULL, true);
+ if (ret)
+ return ret;
+
+ ret = devm_request_threaded_irq(cs40l26->dev, cs40l26->irq, NULL, cs40l26_irq_handler,
+ IRQF_ONESHOT, "cs40l26", cs40l26);
+ if (ret)
+ dev_err(cs40l26->dev, "Failed to request IRQ\n");
+
+ return ret;
+}
+
+static int cs40l26_hw_init(struct cs40l26 *cs40l26)
+{
+ int ret;
+
+ cs40l26->irq_masks = cs40l26_irq_masks;
+
+ ret = cs40l26_wksrc_config(cs40l26);
+ if (ret)
+ return ret;
+
+ cs40l26_gpio_config(cs40l26);
+
+ ret = cs40l26_bst_ipk_config(cs40l26);
+ if (ret)
+ return ret;
+
+ ret = cs40l26_bst_ctl_config(cs40l26);
+ if (ret)
+ return ret;
+
+ return cs40l26_irq_init(cs40l26);
+}
+
+static int cs40l26_cs_dsp_pre_run(struct cs_dsp *dsp)
+{
+ struct cs40l26 *cs40l26 = container_of(dsp, struct cs40l26, dsp);
+ int ret;
+
+ ret = cs40l26_pm_timeout_ms_set(cs40l26, CS40L26_DSP_STATE_STANDBY, 100);
+ if (ret) {
+ dev_err(cs40l26->dev, "Failed to set standby timeout\n");
+ return ret;
+ }
+
+ ret = cs40l26_pm_timeout_ms_set(cs40l26, CS40L26_DSP_STATE_ACTIVE, 250);
+ if (ret) {
+ dev_err(cs40l26->dev, "Failed to set active timeout\n");
+ return ret;
+ }
+
+ ret = regmap_set_bits(cs40l26->regmap, CS40L26_PWRMGT_CTL, CS40L26_MEM_RDY);
+ if (ret) {
+ dev_err(cs40l26->dev, "Failed to set MEM_RDY\n");
+ return ret;
+ }
+
+ ret = cs40l26_fw_read(dsp, "QUEUE_BASE", CS40L26_DSP_ALGO_ID, &cs40l26->queue_base);
+ if (ret)
+ return ret;
+
+ ret = cs40l26_fw_read(dsp, "QUEUE_LEN", CS40L26_DSP_ALGO_ID, &cs40l26->queue_len);
+ if (ret)
+ return ret;
+
+ cs40l26->queue_last = cs40l26->queue_base + ((cs40l26->queue_len - 1) * sizeof(u32));
+
+ ret = cs40l26_fw_write(dsp, "CALL_RAM_INIT", dsp->fw_id, 1);
+ if (ret)
+ return ret;
+
+ ret = cs40l26_wseq_init(cs40l26);
+ if (ret)
+ return ret;
+
+ if (cs40l26->variant->handle_errata)
+ return cs40l26->variant->handle_errata(cs40l26);
+ else
+ return 0;
+}
+
+static int cs40l26_cs_dsp_post_run(struct cs_dsp *dsp)
+{
+ struct cs40l26 *cs40l26 = container_of(dsp, struct cs40l26, dsp);
+ u32 halo_state;
+ int ret;
+
+ /*
+ * cs_dsp_halo_start_core() has reset the DSP core at this point.
+ * Hibernation must be disabled again.
+ */
+ ret = cs40l26_prevent_hiber(cs40l26);
+ if (ret)
+ return ret;
+
+ ret = cs40l26_fw_read(dsp, "HALO_STATE", dsp->fw_id, &halo_state);
+ if (ret)
+ return ret;
+
+ if (halo_state != CS40L26_DSP_HALO_STATE_RUN) {
+ dev_err(dsp->dev, "Invalid DSP state: %u\n", halo_state);
+ return -EINVAL;
+ }
+
+ ret = cs40l26_hw_init(cs40l26);
+ if (ret)
+ return ret;
+
+ dev_dbg(dsp->dev, "CS40L26/L27 DSP started successfully\n");
+
+ ret = devm_mfd_add_devices(cs40l26->dev, PLATFORM_DEVID_AUTO, cs40l26_devs,
+ ARRAY_SIZE(cs40l26_devs), NULL, 0, NULL);
+ if (ret)
+ dev_err(cs40l26->dev, "Failed to add MFD child devices: %d\n", ret);
+
+ return ret;
+}
+
+static const struct cs_dsp_client_ops cs40l26_cs_dsp_client_ops = {
+ .pre_run = cs40l26_cs_dsp_pre_run,
+ .post_run = cs40l26_cs_dsp_post_run,
+};
+
+static void cs40l26_cs_dsp_remove(void *data)
+{
+ cs_dsp_remove((struct cs_dsp *)data);
+}
+
+static struct cs_dsp_coeff_desc cs40l26_coeffs[] = {
+ { .coeff_firmware = NULL, .coeff_filename = "cs40l26.bin" },
+ { .coeff_firmware = NULL, .coeff_filename = "cs40l26-svc.bin" },
+ { .coeff_firmware = NULL, .coeff_filename = "cs40l26-dvl.bin" },
+};
+
+static int cs40l26_cs_dsp_init(struct cs40l26 *cs40l26)
+{
+ struct cs_dsp *dsp = &cs40l26->dsp;
+ int ret;
+
+ dsp->num = 1;
+ dsp->type = WMFW_HALO;
+ dsp->dev = cs40l26->dev;
+ dsp->regmap = cs40l26->regmap;
+ dsp->base = CS40L26_DSP_CTRL_BASE;
+ dsp->base_sysinfo = CS40L26_DSP1_SYS_INFO_ID;
+ dsp->mem = cs40l26_dsp_regions;
+ dsp->num_mems = ARRAY_SIZE(cs40l26_dsp_regions);
+ dsp->client_ops = &cs40l26_cs_dsp_client_ops;
+
+ ret = cs_dsp_halo_init(dsp);
+ if (ret) {
+ dev_err(cs40l26->dev, "Failed to initialize HALO core\n");
+ return ret;
+ }
+
+ return devm_add_action_or_reset(cs40l26->dev, cs40l26_cs_dsp_remove, dsp);
+}
+
+static void cs40l26_dsp_start(struct cs40l26 *cs40l26)
+{
+ int i, ret;
+
+ ret = cs40l26_dsp_pre_config(cs40l26);
+ if (ret) {
+ dev_err(cs40l26->dev, "DSP Pre Config. Failed: %d\n", ret);
+ goto err_fw_rls;
+ }
+
+ guard(mutex)(&cs40l26->lock);
+
+ ret = cs_dsp_power_up_multiple(&cs40l26->dsp, cs40l26->wmfw, "cs40l26.wmfw", cs40l26_coeffs,
+ CS40L26_NUM_COEFF_FILES, "cs40l26");
+ if (ret) {
+ dev_err(cs40l26->dev, "Failed to Power Up DSP\n");
+ goto err_fw_rls;
+ }
+
+ if (cs40l26->dsp.fw_id != CS40L26_FW_ID) {
+ dev_err(cs40l26->dev, "Invalid firmware ID: 0x%X\n", cs40l26->dsp.fw_id);
+ goto err_fw_rls;
+ }
+
+ if (cs40l26->dsp.fw_id_version < cs40l26->variant->info->fw_min_rev) {
+ dev_err(cs40l26->dev, "Invalid firmware revision: 0x%X\n",
+ cs40l26->dsp.fw_id_version);
+ goto err_fw_rls;
+ }
+
+ ret = cs_dsp_run(&cs40l26->dsp);
+ if (ret)
+ dev_err(cs40l26->dev, "DSP Failed to run: %d\n", ret);
+
+err_fw_rls:
+ for (i = 0; i < CS40L26_NUM_COEFF_FILES; i++)
+ release_firmware(cs40l26_coeffs[i].coeff_firmware);
+
+ release_firmware(cs40l26->wmfw);
+}
+
+static void cs40l26_fw_upload(const struct firmware *wmfw, void *context)
+{
+ struct cs40l26 *cs40l26 = (struct cs40l26 *)context;
+ const struct firmware *coeff;
+ int i, ret;
+
+ if (!wmfw) {
+ dev_err(cs40l26->dev, "Failed to request firmware file\n");
+ return;
+ }
+
+ cs40l26->wmfw = wmfw;
+
+ for (i = 0; i < CS40L26_NUM_COEFF_FILES; i++) {
+ ret = request_firmware(&coeff, cs40l26_coeffs[i].coeff_filename, cs40l26->dev);
+ if (ret)
+ continue;
+
+ cs40l26_coeffs[i].coeff_firmware = coeff;
+ }
+
+ return cs40l26_dsp_start(cs40l26);
+}
+
+static int cs40l26_init(struct cs40l26 *cs40l26)
+{
+ int ret;
+
+ cs40l26->bst_ipk_ua = CS40L26_BST_IPK_UA_DEFAULT;
+ cs40l26->vbst_uv = CS40L26_BST_UV_MAX;
+ /*
+ * Set the PLL to open-loop and remove default GPI mappings to prevent DSP lockup while
+ * the driver configures RAM firmware.
+ *
+ * The firmware will set the PLL back to closed-loop when the DSP has been started.
+ */
+ ret = cs40l26_set_pll_loop(cs40l26, CS40L26_PLL_OPEN);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(cs40l26->regmap, cs40l26->variant->info->event_map_1,
+ CS40L26_EVENT_MAP_GPI_DISABLE);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(cs40l26->regmap, cs40l26->variant->info->event_map_2,
+ CS40L26_EVENT_MAP_GPI_DISABLE);
+ if (ret)
+ return ret;
+
+ /* Set LRA to HI-Z to avoid fault conditions */
+ return regmap_set_bits(cs40l26->regmap, CS40L26_TST_DAC_MSM_CONFIG,
+ CS40L26_SPK_DEFAULT_HIZ);
+}
+
+static int cs40l26_parse_properties(struct cs40l26 *cs40l26)
+{
+ struct device *dev = cs40l26->dev;
+ int ret;
+
+ ret = device_property_read_u32(dev, "cirrus,bst-ctl-microvolt", &cs40l26->vbst_uv);
+ if (ret && ret != -EINVAL)
+ return ret;
+
+ ret = device_property_read_u32(dev, "cirrus,bst-ipk-microamp", &cs40l26->bst_ipk_ua);
+ if (ret && ret != -EINVAL)
+ return ret;
+
+ return 0;
+}
+
+int cs40l26_probe(struct cs40l26 *cs40l26)
+{
+ int ret;
+
+ mutex_init(&cs40l26->lock);
+
+ cs40l26->reset_gpio = devm_gpiod_get_optional(cs40l26->dev, "reset", GPIOD_OUT_HIGH);
+ if (!cs40l26->reset_gpio)
+ return dev_err_probe(cs40l26->dev, -EINVAL, "Failed to get reset GPIO\n");
+
+ ret = devm_regulator_bulk_get_enable(cs40l26->dev, ARRAY_SIZE(cs40l26_supplies),
+ cs40l26_supplies);
+ if (ret)
+ return dev_err_probe(cs40l26->dev, ret, "Failed to get supplies\n");
+
+ usleep_range(CS40L26_MIN_RESET_PULSE_US, CS40L26_MIN_RESET_PULSE_US + 100);
+
+ gpiod_set_value_cansleep(cs40l26->reset_gpio, 0);
+
+ usleep_range(CS40L26_CP_READY_DELAY_US, CS40L26_CP_READY_DELAY_US + 100);
+
+ ret = cs40l26_get_model(cs40l26);
+ if (ret)
+ return dev_err_probe(cs40l26->dev, ret, "Failed to get part number\n");
+
+ ret = cs40l26_prevent_hiber(cs40l26);
+ if (ret)
+ return dev_err_probe(cs40l26->dev, ret, "Failed to prevent hibernation\n");
+
+ ret = cs40l26_init(cs40l26);
+ if (ret)
+ return dev_err_probe(cs40l26->dev, ret, "Failed to initialize device\n");
+
+ ret = cs40l26_parse_properties(cs40l26);
+ if (ret)
+ return dev_err_probe(cs40l26->dev, ret, "Failed to parse devicetree\n");
+
+ ret = cs40l26_cs_dsp_init(cs40l26);
+ if (ret)
+ return dev_err_probe(cs40l26->dev, ret, "Failed to initialize CS DSP\n");
+
+ ret = cs40l26_pm_runtime_setup(cs40l26->dev);
+ if (ret)
+ return dev_err_probe(cs40l26->dev, ret, "Failed to set up PM Runtime\n");
+
+ ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT, "cs40l26.wmfw", cs40l26->dev,
+ GFP_KERNEL, cs40l26, cs40l26_fw_upload);
+ if (ret)
+ return dev_err_probe(cs40l26->dev, ret, "Failed to load firmware\n");
+
+ cs40l26_pm_exit(cs40l26->dev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cs40l26_probe);
+
+static int __maybe_unused cs40l26_suspend(struct device *dev)
+{
+ struct cs40l26 *cs40l26 = dev_get_drvdata(dev);
+
+ guard(mutex)(&cs40l26->lock);
+
+ dev_dbg(dev, "%s: Enabling hibernation\n", __func__);
+
+ cs40l26->wksrc_sts = 0x00;
+
+ /* Don't poll DSP since reading for ACK will wake the device again */
+ return regmap_write(cs40l26->regmap, CS40L26_DSP_QUEUE, CS40L26_DSP_CMD_ALLOW_HIBER);
+}
+
+static int __maybe_unused cs40l26_sys_suspend(struct device *dev)
+{
+ struct cs40l26 *cs40l26 = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "System suspend, disabling IRQ\n");
+
+ disable_irq(cs40l26->irq);
+
+ return 0;
+}
+
+static int __maybe_unused cs40l26_sys_suspend_noirq(struct device *dev)
+{
+ struct cs40l26 *cs40l26 = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "Late system suspend, re-enabling IRQ\n");
+
+ enable_irq(cs40l26->irq);
+
+ return 0;
+}
+
+static int __maybe_unused cs40l26_resume(struct device *dev)
+{
+ struct cs40l26 *cs40l26 = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "%s: Disabling hibernation\n", __func__);
+
+ guard(mutex)(&cs40l26->dsp.pwr_lock);
+
+ return cs40l26_prevent_hiber(cs40l26);
+}
+
+static int __maybe_unused cs40l26_sys_resume(struct device *dev)
+{
+ struct cs40l26 *cs40l26 = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "System resume, re-enabling IRQ\n");
+
+ enable_irq(cs40l26->irq);
+
+ return 0;
+}
+
+static int __maybe_unused cs40l26_sys_resume_noirq(struct device *dev)
+{
+ struct cs40l26 *cs40l26 = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "Early system resume, disabling IRQ\n");
+
+ disable_irq(cs40l26->irq);
+
+ return 0;
+}
+
+EXPORT_GPL_DEV_PM_OPS(cs40l26_pm_ops) = {
+ RUNTIME_PM_OPS(cs40l26_suspend, cs40l26_resume, NULL)
+ SYSTEM_SLEEP_PM_OPS(cs40l26_sys_suspend, cs40l26_sys_resume)
+ NOIRQ_SYSTEM_SLEEP_PM_OPS(cs40l26_sys_suspend_noirq, cs40l26_sys_resume_noirq)
+};
+
+MODULE_DESCRIPTION("CS40L26 Boosted Class D Amplifier for Haptics");
+MODULE_AUTHOR("Fred Treven, Cirrus Logic Inc. <ftreven@opensource.cirrus.com>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("FW_CS_DSP");
new file mode 100644
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CS40L26 Boosted Haptic Driver with Integrated DSP and
+ * Waveform Memory with Advanced Closed Loop Algorithms and LRA protection
+ *
+ * Copyright 2025 Cirrus Logic, Inc.
+ *
+ * Author: Fred Treven <ftreven@opensource.cirrus.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/mfd/cs40l26.h>
+
+static int cs40l26_i2c_probe(struct i2c_client *i2c)
+{
+ struct cs40l26 *cs40l26;
+
+ cs40l26 = devm_kzalloc(&i2c->dev, sizeof(struct cs40l26), GFP_KERNEL);
+ if (!cs40l26)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, cs40l26);
+
+ cs40l26->dev = &i2c->dev;
+ cs40l26->irq = i2c->irq;
+ cs40l26->bus = &i2c_bus_type;
+
+ cs40l26->regmap = devm_regmap_init_i2c(i2c, &cs40l26_regmap);
+ if (IS_ERR(cs40l26->regmap))
+ return dev_err_probe(cs40l26->dev, PTR_ERR(cs40l26->regmap),
+ "Failed to allocate register map\n");
+
+ return cs40l26_probe(cs40l26);
+}
+
+static const struct i2c_device_id cs40l26_id_i2c[] = {
+ { "cs40l26a", 0 },
+ { "cs40l27b", 1 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, cs40l26_id_i2c);
+
+static const struct of_device_id cs40l26_of_match[] = {
+ { .compatible = "cirrus,cs40l26a" },
+ { .compatible = "cirrus,cs40l27b" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, cs40l26_of_match);
+
+static struct i2c_driver cs40l26_i2c_driver = {
+ .driver = {
+ .name = "cs40l26",
+ .of_match_table = cs40l26_of_match,
+ .pm = pm_ptr(&cs40l26_pm_ops),
+ },
+ .id_table = cs40l26_id_i2c,
+ .probe = cs40l26_i2c_probe,
+};
+module_i2c_driver(cs40l26_i2c_driver);
+
+MODULE_DESCRIPTION("CS40L26 I2C Driver");
+MODULE_AUTHOR("Fred Treven, Cirrus Logic Inc. <ftreven@opensource.cirrus.com>");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CS40L26 Boosted Haptic Driver with Integrated DSP and
+ * Waveform Memory with Advanced Closed Loop Algorithms and LRA protection
+ *
+ * Copyright 2025 Cirrus Logic, Inc.
+ *
+ * Author: Fred Treven <ftreven@opensource.cirrus.com>
+ */
+
+#include <linux/mfd/cs40l26.h>
+#include <linux/spi/spi.h>
+
+static int cs40l26_spi_probe(struct spi_device *spi)
+{
+ struct cs40l26 *cs40l26;
+
+ cs40l26 = devm_kzalloc(&spi->dev, sizeof(struct cs40l26), GFP_KERNEL);
+ if (!cs40l26)
+ return -ENOMEM;
+
+ spi_set_drvdata(spi, cs40l26);
+
+ cs40l26->dev = &spi->dev;
+ cs40l26->irq = spi->irq;
+ cs40l26->bus = &spi_bus_type;
+
+ cs40l26->regmap = devm_regmap_init_spi(spi, &cs40l26_regmap);
+ if (IS_ERR(cs40l26->regmap))
+ return dev_err_probe(cs40l26->dev, PTR_ERR(cs40l26->regmap),
+ "Failed to allocate register map\n");
+
+ return cs40l26_probe(cs40l26);
+}
+
+static const struct spi_device_id cs40l26_id_spi[] = {
+ { "cs40l26a", 0 },
+ { "cs40l27b", 1 },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, cs40l26_id_spi);
+
+static const struct of_device_id cs40l26_of_match[] = {
+ { .compatible = "cirrus,cs40l26a" },
+ { .compatible = "cirrus,cs40l27b" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, cs40l26_of_match);
+
+static struct spi_driver cs40l26_spi_driver = {
+ .driver = {
+ .name = "cs40l26",
+ .of_match_table = cs40l26_of_match,
+ .pm = pm_ptr(&cs40l26_pm_ops),
+ },
+ .id_table = cs40l26_id_spi,
+ .probe = cs40l26_spi_probe,
+};
+module_spi_driver(cs40l26_spi_driver);
+
+MODULE_DESCRIPTION("CS40L26 SPI Driver");
+MODULE_AUTHOR("Fred Treven, Cirrus Logic Inc. <ftreven@opensource.cirrus.com>");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,341 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * CS40L26 Boosted Haptic Driver with Integrated DSP and
+ * Waveform Memory with Advanced Closed Loop Algorithms and LRA protection
+ *
+ * Copyright 2025 Cirrus Logic, Inc.
+ *
+ * Author: Fred Treven <ftreven@opensource.cirrus.com>
+ */
+
+#ifndef __MFD_CS40L26_H__
+#define __MFD_CS40L26_H__
+
+#include <linux/bitops.h>
+#include <linux/firmware/cirrus/cs_dsp.h>
+#include <linux/firmware/cirrus/wmfw.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+/* Register Addresses */
+#define CS40L26_LASTREG 0x3C7DFE8
+#define CS40L26_DEVID 0x0
+#define CS40L26_REVID 0x4
+#define CS40L26_GLOBAL_ENABLES 0x2014
+#define CS40L26_ERROR_RELEASE 0x2034
+#define CS40L26_PWRMGT_CTL 0x2900
+#define CS40L26_WAKESRC_CTL 0x2904
+#define CS40L26_PWRMGT_STS 0x290C
+#define CS40L26_REFCLK_INPUT 0x2C04
+#define CS40L26_PLL_REFCLK_DETECT_0 0x2C28
+#define CS40L26_VBST_CTL_1 0x3800
+#define CS40L26_VBST_CTL_2 0x3804
+#define CS40L26_BST_IPK_CTL 0x3808
+#define CS40L26_TEST_LBST 0x391C
+#define CS40L26_DAC_MSM_CONFIG 0x7400
+#define CS40L26_TST_DAC_MSM_CONFIG 0x7404
+#define CS40L26_IRQ1_STATUS 0x10004
+#define CS40L26_IRQ1_EINT_1 0x10010
+#define CS40L26_IRQ1_EINT_2 0x10014
+#define CS40L26_IRQ1_MASK_1 0x10110
+#define CS40L26_IRQ1_MASK_2 0x10114
+#define CS40L26_DSP_QUEUE 0x13020
+#define CS40L26_DSP1_XMEM_PACKED_0 0x2000000
+#define CS40L26_DSP1_SYS_INFO_ID 0x25E0000
+#define CS40L26_DSP1_XMEM_UNPACKED24_0 0x2800000
+#define CS40L26_DSP1_CCM_CORE_CONTROL 0x2BC1000
+#define CS40L26_DSP1_YMEM_PACKED_0 0x2C00000
+#define CS40L26_DSP1_YMEM_UNPACKED32_0 0x3000000
+#define CS40L26_DSP1_YMEM_UNPACKED24_0 0x3400000
+#define CS40L26_DSP1_PMEM_0 0x3800000
+
+/* Device */
+#define CS40L26_DEVID_L26 0x40A260
+#define CS40L26_DEVID_L27 0x40A270
+#define CS40L26_REVID_A1 0xA1
+#define CS40L26_REVID_B1 0xB1
+#define CS40L26_REVID_B2 0xB2
+#define CS40L26_MIN_RESET_PULSE_US 1500
+#define CS40L26_CP_READY_DELAY_US 6000
+#define CS40L26_SPK_DEFAULT_HIZ BIT(28)
+#define CS40L26_DSP_CCM_CORE_KILL 0x00000080
+#define CS40L26_MEM_RDY BIT(1)
+
+/* Errata */
+#define CS40L26_DISABLE_EXPL_MODE 0x0100C080
+
+#define CS40L26_PLL_REFCLK_DET_DISABLE 0x0
+
+/* Boost Converter Control */
+#define CS40L26_GLOBAL_EN BIT(0)
+
+#define CS40L26_BST_IPK_UA_MAX 4800000
+#define CS40L26_BST_IPK_UA_DEFAULT 4500000
+#define CS40L26_BST_IPK_UA_MIN 1600000
+#define CS40L26_BST_IPK_UA_STEP 50000
+#define CS40L26_BST_IPK_UA_OFFSET 800000
+
+#define CS40L26_BST_UV_MIN 2500000
+#define CS40L26_BST_UV_MAX 11000000
+#define CS40L26_BST_UV_STEP 50000
+
+#define CS40L26_BST_CTL_VP 0x00
+#define CS40L26_BST_CTL_MASK GENMASK(7, 0)
+#define CS40L26_BST_CTL_SEL_MASK GENMASK(1, 0)
+#define CS40L26_BST_CTL_SEL_FIXED 0x0
+#define CS40L26_BST_CTL_LIM_EN_MASK BIT(2)
+#define CS40L26_BST_CTL_LIM_EN 1
+
+#define CS40L26_BST_TIME_US 10000
+
+/* Phase Locked Loop */
+#define CS40L26_PLL_REFCLK_LOOP_MASK BIT(11)
+#define CS40L26_PLL_REFCLK_LOOP_SHIFT 11
+#define CS40L26_PLL_NUM_SET_ATTEMPTS 5
+
+/* GPIO */
+#define CS40L26_EVENT_MAP_GPI_DISABLE 0x1FF
+
+#define CS40L26_A1_B1_EVENT_MAP_1 0x02806FC4
+#define CS40L26_A1_B1_EVENT_MAP_2 0x02806FC8
+
+#define CS40L26_B2_EVENT_MAP_1 0x02806FB0
+#define CS40L26_B2_EVENT_MAP_2 0x02806FB4
+
+/* Power Management */
+#define CS40L26_PM_STDBY_TICKS_OFFSET 16
+#define CS40L26_PM_ACTIVE_TICKS_OFFSET 24
+
+#define CS40L26_A1_B1_PM_CUR_STATE 0x02800370
+#define CS40L26_A1_B1_PM_STATE_LOCKS 0x02800378
+#define CS40L26_A1_B1_PM_STATE_LOCKS3 (CS40L26_A1_B1_PM_STATE_LOCKS + \
+ CS40L26_DSP_LOCK3_OFFSET_BYTES)
+
+#define CS40L26_A1_B1_PM_TIMEOUT_TICKS 0x02800350
+#define CS40L26_A1_B1_PM_STDBY_TICKS (CS40L26_A1_B1_PM_TIMEOUT_TICKS + \
+ CS40L26_PM_STDBY_TICKS_OFFSET)
+#define CS40L26_A1_B1_PM_ACTIVE_TICKS (CS40L26_A1_B1_PM_TIMEOUT_TICKS + \
+ CS40L26_PM_ACTIVE_TICKS_OFFSET)
+
+#define CS40L26_A1_B1_HALO_STATE 0x02800FA8
+
+#define CS40L26_B2_PM_CUR_STATE 0x02801F98
+#define CS40L26_B2_PM_STATE_LOCKS 0x02801FA0
+#define CS40L26_B2_PM_STATE_LOCKS3 (CS40L26_B2_PM_STATE_LOCKS + CS40L26_DSP_LOCK3_OFFSET_BYTES)
+#define CS40L26_B2_PM_TIMEOUT_TICKS 0x02801F78
+#define CS40L26_B2_PM_STDBY_TICKS (CS40L26_B2_PM_TIMEOUT_TICKS + \
+ CS40L26_PM_STDBY_TICKS_OFFSET)
+#define CS40L26_B2_PM_ACTIVE_TICKS (CS40L26_B2_PM_TIMEOUT_TICKS + \
+ CS40L26_PM_ACTIVE_TICKS_OFFSET)
+
+#define CS40L26_B2_HALO_STATE 0x02806AF8
+
+#define CS40L26_AUTOSUSPEND_DELAY_MS 2000
+#define CS40L26_PM_TICKS_PER_SEC 32768
+
+/* Firmware Handling */
+#define CS40L26_FW_ID 0x1800D4
+#define CS40L26_FW_A1_B1_MIN_REV 0x070247
+#define CS40L26_FW_B2_MIN_REV 0x0A0000
+
+#define CS40L26_NUM_COEFF_FILES 3
+
+/* Algorithms */
+#define CS40L26_VIBEGEN_ALGO_ID_A1 0x000400BD
+#define CS40L26_VIBEGEN_ALGO_ID_B2 0x000A00BD
+
+#define CS40L26_BUZZGEN_ALGO_ID 0x0004F202
+#define CS40L26_A2H_ALGO_ID 0x00040110
+#define CS40L26_EXT_ALGO_ID 0x0004013C
+#define CS40L26_DSP_ALGO_ID 0x0004F203
+#define CS40L26_PM_ALGO_ID 0x0004F206
+
+/* DSP */
+#define CS40L26_DSP_LOCK3_OFFSET_BYTES 8
+#define CS40L26_DSP_LOCK3_OFFSET_WORDS (CS40L26_DSP_LOCK3_OFFSET_BYTES / sizeof(u32))
+#define CS40L26_DSP_LOCK3_MASK BIT(1)
+#define CS40L26_DSP_HALO_STATE_RUN 2
+#define CS40L26_DSP_CTRL_BASE 0x2B80000
+#define CS40L26_DSP_POLL_US 1000
+#define CS40L26_DSP_TIMEOUT_COUNT 100
+#define CS40L26_PM_LOCKS_TIMEOUT_COUNT 10
+#define CS40L26_DSP_STATE_TIMEOUT_COUNT 10
+
+#define CS40L26_DSP_CMD_PREVENT_HIBER 0x02000003
+#define CS40L26_DSP_CMD_ALLOW_HIBER 0x02000004
+#define CS40L26_DSP_CMD_INDEX_MASK GENMASK(28, 24)
+#define CS40L26_DSP_CMD_PAYLOAD_MASK GENMASK(23, 0)
+
+#define CS40L26_DSP_COMPLETE_CP 0x01000000
+#define CS40L26_DSP_COMPLETE_I2S 0x01000002
+#define CS40L26_DSP_TRIGGER_CP 0x01000010
+#define CS40L26_DSP_TRIGGER_I2S 0x01000012
+#define CS40L26_DSP_PM_AWAKE 0x02000002
+#define CS40L26_DSP_SYS_ACK 0x0A000000
+#define CS40L26_DSP_PANIC 0x0C000000
+
+/* Wake Sources */
+#define CS40L26_WKSRC_STS_MASK GENMASK(9, 4)
+#define CS40L26_WKSRC_STS_SHIFT 4
+#define CS40L26_WKSRC_STS_EN BIT(7)
+#define CS40L26_WKSRC_POL_SPI BIT(4)
+#define CS40L26_WKSRC_EN_SPI BIT(9)
+#define CS40L26_WKSRC_EN_I2C BIT(10)
+#define CS40L26_WKSRC_GPIO_POL_MASK GENMASK(3, 0)
+
+/* Interrupts */
+#define CS40L26_IRQ_GPIO1_RISE 0
+#define CS40L26_IRQ_GPIO1_FALL 1
+#define CS40L26_IRQ_WKSRC_STS_ANY 8
+#define CS40L26_IRQ_WKSRC_STS_GPIO1 9
+#define CS40L26_IRQ_WKSRC_STS_SPI 13
+#define CS40L26_IRQ_WKSRC_STS_I2C 14
+#define CS40L26_IRQ_BST_OVP_FLAG_RISE 18
+#define CS40L26_IRQ_BST_OVP_FLAG_FALL 19
+#define CS40L26_IRQ_BST_OVP_ERR 20
+#define CS40L26_IRQ_BST_DCM_UVP_ERR 21
+#define CS40L26_IRQ_BST_SHORT_ERR 22
+#define CS40L26_IRQ_BST_IPK_FLAG 23
+#define CS40L26_IRQ_TEMP_WARN_RISE 24
+#define CS40L26_IRQ_TEMP_WARN_FALL 25
+#define CS40L26_IRQ_TEMP_ERR 26
+#define CS40L26_IRQ_AMP_ERR 27
+#define CS40L26_IRQ_DSP_RX_QUEUE 31
+
+#define CS40L26_IRQ_1_NBITS 32
+
+#define CS40L26_IRQ_REFCLK_PRESENT 6
+#define CS40L26_IRQ_REFCLK_MISSING_FALL 7
+#define CS40L26_IRQ_REFCLK_MISSING_RISE 8
+#define CS40L26_IRQ_VPMON_CLIPPED 23
+#define CS40L26_IRQ_VBSTMON_CLIPPED 24
+#define CS40L26_IRQ_VMON_CLIPPED 25
+#define CS40L26_IRQ_IMON_CLIPPED 26
+
+#define CS40L26_IRQ_2_NBITS 30
+
+#define CS40L26_IRQ_1_ALL_MASKED 0xFFFFFFFF
+#define CS40L26_IRQ_2_ALL_MASKED 0x3FFFFFFF
+
+#define CS40L26_IRQ_STATUS_ASSERT 0x1
+
+/* Playback */
+#define CS40L26_STOP_PLAYBACK 0x05000000
+
+#define CS40L26_START_I2S 0x03000002
+#define CS40L26_STOP_I2S 0x03000003
+
+/* Error Release */
+enum cs40l26_error {
+ CS40L26_ERROR_NONE,
+ CS40L26_ERROR_AMP_SHORT,
+ CS40L26_ERROR_BST_SHORT,
+ CS40L26_ERROR_BST_OVP,
+ CS40L26_ERROR_BST_DCM_UVP,
+ CS40L26_ERROR_TEMP_WARN,
+ CS40L26_ERROR_TEMP_ERR,
+};
+
+struct cs40l26_irq {
+ int virq;
+ u32 mask;
+ const char *name;
+ int (*handler)(void *data);
+};
+
+#define CS40L26_IRQ(_irq, _name, _hand) \
+ { \
+ .virq = CS40L26_IRQ_ ## _irq, \
+ .mask = BIT(CS40L26_ ## IRQ_ ## _irq), \
+ .name = _name, \
+ .handler = _hand, \
+ }
+
+enum cs40l26_dsp_state {
+ CS40L26_DSP_STATE_HIBERNATE,
+ CS40L26_DSP_STATE_SHUTDOWN,
+ CS40L26_DSP_STATE_STANDBY,
+ CS40L26_DSP_STATE_ACTIVE,
+ CS40L26_DSP_STATE_NONE,
+};
+
+enum cs40l26_gpio_map {
+ CS40L26_GPIO_MAP_A_PRESS,
+ CS40L26_GPIO_MAP_A_RELEASE,
+ CS40L26_GPIO_MAP_NUM_AVAILABLE,
+ CS40L26_GPIO_MAP_INVALID,
+};
+
+enum cs40l26_pll {
+ CS40L26_PLL_CLOSED,
+ CS40L26_PLL_OPEN,
+};
+
+enum cs40l50_wseqs {
+ CS40L26_WSEQ_POWER_ON,
+ CS40L26_WSEQ_ACTIVE,
+ CS40L26_WSEQ_STANDBY,
+ CS40L26_NUM_WSEQS,
+};
+
+struct cs40l26_variant_info {
+ u32 pm_cur_state;
+ u32 pm_state_locks;
+ u32 pm_state_locks3;
+ u32 pm_stdby_ticks;
+ u32 pm_active_ticks;
+ u32 halo_state;
+ u32 event_map_1;
+ u32 event_map_2;
+ u32 fw_min_rev;
+ u32 ram_ext_algo_id;
+ u32 vibegen_algo_id;
+};
+
+struct cs40l26_variant;
+
+struct cs40l26 {
+ struct device *dev;
+ struct regmap *regmap;
+ struct cs_dsp dsp;
+ int irq;
+ struct mutex lock;
+ struct gpio_desc *reset_gpio;
+ u32 devid;
+ u32 revid;
+ const struct cs40l26_variant *variant;
+ struct cs_dsp_wseq wseqs[CS40L26_NUM_WSEQS];
+ u8 wksrc_sts;
+ u8 last_wksrc_pol;
+ u32 queue_base;
+ u32 queue_len;
+ u32 queue_last;
+ unsigned int bst_ipk_ua;
+ unsigned int vbst_uv;
+ const struct firmware *wmfw;
+ const struct bus_type *bus;
+ struct reg_sequence *irq_masks;
+};
+
+struct cs40l26_variant {
+ const struct cs40l26_variant_info *info;
+ int (*handle_errata)(struct cs40l26 *cs40l26);
+};
+
+inline void cs40l26_pm_exit(struct device *dev);
+int cs40l26_probe(struct cs40l26 *cs40l26);
+int cs40l26_set_pll_loop(struct cs40l26 *cs40l26, const u32 pll_loop);
+int cs40l26_dsp_write(struct cs40l26 *cs40l26, const u32 val);
+int cs40l26_dsp_state_get(struct cs40l26 *cs40l26, u32 *state);
+inline int cs40l26_fw_write(struct cs_dsp *dsp, const char *const name,
+ const unsigned int algo_id, u32 val);
+inline int cs40l26_fw_read(struct cs_dsp *dsp, const char *const name,
+ const unsigned int algo_id, u32 *buf);
+
+extern const struct regmap_config cs40l26_regmap;
+extern const struct dev_pm_ops cs40l26_pm_ops;
+
+#endif /* __CS40L26_H__ */
Introduce support for Cirrus Logic Device CS40L26: A boosted haptic driver with integrated DSP and waveform memory with advanced closed loop algorithms and LRA protection. Signed-off-by: Fred Treven <ftreven@opensource.cirrus.com> --- drivers/mfd/Kconfig | 29 + drivers/mfd/Makefile | 4 + drivers/mfd/cs40l26-core.c | 1412 +++++++++++++++++++++++++++++++++++ drivers/mfd/cs40l26-i2c.c | 63 ++ drivers/mfd/cs40l26-spi.c | 63 ++ include/linux/mfd/cs40l26.h | 341 +++++++++ 6 files changed, 1912 insertions(+) create mode 100644 drivers/mfd/cs40l26-core.c create mode 100644 drivers/mfd/cs40l26-i2c.c create mode 100644 drivers/mfd/cs40l26-spi.c create mode 100644 include/linux/mfd/cs40l26.h