[PATCH v2 05/10] ASoC: wcd9335: add CLASS-H Controller support

Srinivas Kandagatla
2018-07-27T12:21:21Z

CLASS-H controller/Amplifier is common accorss Qualcomm WCD codec series.
This patchset adds basic CLASS-H controller apis for WCD codecs after
wcd9335 to use.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
sound/soc/codecs/Makefile | 2 +-
sound/soc/codecs/wcd-clsh.c | 605 ++++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/wcd-clsh.h | 49 ++++
sound/soc/codecs/wcd9335.c | 10 +
4 files changed, 665 insertions(+), 1 deletion(-)
create mode 100644 sound/soc/codecs/wcd-clsh.c
create mode 100644 sound/soc/codecs/wcd-clsh.h

diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 01410b63daac..e3a3d4694e15 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -192,7 +192,7 @@ snd-soc-twl4030-objs := twl4030.o
snd-soc-twl6040-objs := twl6040.o
snd-soc-uda134x-objs := uda134x.o
snd-soc-uda1380-objs := uda1380.o
-snd-soc-wcd9335-objs := wcd9335.o
+snd-soc-wcd9335-objs := wcd-clsh.o wcd9335.o
snd-soc-wl1273-objs := wl1273.o
snd-soc-wm-adsp-objs := wm_adsp.o
snd-soc-wm0010-objs := wm0010.o
diff --git a/sound/soc/codecs/wcd-clsh.c b/sound/soc/codecs/wcd-clsh.c
new file mode 100644
index 000000000000..2393456cbd97
--- /dev/null
+++ b/sound/soc/codecs/wcd-clsh.c
@@ -0,0 +1,605 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
+// Copyright (c) 2017-2018, Linaro Limited
+
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/mfd/wcd9335/wcd9335.h>
+#include <linux/mfd/wcd9335/registers.h>
+#include "wcd-clsh.h"
+
+struct wcd_clsh_ctrl {
+ int state;
+ int mode;
+ int flyback_users;
+ int buck_users;
+ int clsh_users;
+ int codec_version;
+ struct snd_soc_component *comp;
+};
+
+/* Class-H registers for codecs from and above WCD9335 */
+#define WCD9XXX_A_CDC_RX0_RX_PATH_CFG0 WCD9335_REG(0xB, 0x42)
+#define WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK BIT(6)
+#define WCD9XXX_A_CDC_RX_PATH_CLSH_ENABLE BIT(6)
+#define WCD9XXX_A_CDC_RX_PATH_CLSH_DISABLE 0
+#define WCD9XXX_A_CDC_RX1_RX_PATH_CFG0 WCD9335_REG(0xB, 0x56)
+#define WCD9XXX_A_CDC_RX2_RX_PATH_CFG0 WCD9335_REG(0xB, 0x6A)
+#define WCD9XXX_A_CDC_CLSH_K1_MSB WCD9335_REG(0xC, 0x08)
+#define WCD9XXX_A_CDC_CLSH_K1_MSB_COEF_MASK GENMASK(3, 0)
+#define WCD9XXX_A_CDC_CLSH_K1_LSB WCD9335_REG(0xC, 0x09)
+#define WCD9XXX_A_CDC_CLSH_K1_LSB_COEF_MASK GENMASK(7, 0)
+#define WCD9XXX_A_ANA_RX_SUPPLIES WCD9335_REG(0x6, 0x08)
+#define WCD9XXX_A_ANA_RX_REGULATOR_MODE_MASK BIT(1)
+#define WCD9XXX_A_ANA_RX_REGULATOR_MODE_CLS_H 0
+#define WCD9XXX_A_ANA_RX_REGULATOR_MODE_CLS_AB BIT(1)
+#define WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_MASK BIT(2)
+#define WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_UHQA BIT(2)
+#define WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_DEFAULT 0
+#define WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_MASK BIT(3)
+#define WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_UHQA BIT(3)
+#define WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_DEFAULT 0
+#define WCD9XXX_A_ANA_RX_VNEG_EN_MASK BIT(6)
+#define WCD9XXX_A_ANA_RX_VNEG_EN_SHIFT 6
+#define WCD9XXX_A_ANA_RX_VNEG_ENABLE BIT(6)
+#define WCD9XXX_A_ANA_RX_VNEG_DISABLE 0
+#define WCD9XXX_A_ANA_RX_VPOS_EN_MASK BIT(7)
+#define WCD9XXX_A_ANA_RX_VPOS_EN_SHIFT 7
+#define WCD9XXX_A_ANA_RX_VPOS_ENABLE BIT(7)
+#define WCD9XXX_A_ANA_RX_VPOS_DISABLE 0
+#define WCD9XXX_A_ANA_HPH WCD9335_REG(0x6, 0x09)
+#define WCD9XXX_A_ANA_HPH_PWR_LEVEL_MASK GENMASK(3, 2)
+#define WCD9XXX_A_ANA_HPH_PWR_LEVEL_UHQA 0x08
+#define WCD9XXX_A_ANA_HPH_PWR_LEVEL_LP 0x04
+#define WCD9XXX_A_ANA_HPH_PWR_LEVEL_NORMAL 0x0
+#define WCD9XXX_A_CDC_CLSH_CRC WCD9335_REG(0xC, 0x01)
+#define WCD9XXX_A_CDC_CLSH_CRC_CLK_EN_MASK BIT(0)
+#define WCD9XXX_A_CDC_CLSH_CRC_CLK_ENABLE BIT(0)
+#define WCD9XXX_A_CDC_CLSH_CRC_CLK_DISABLE 0
+#define WCD9XXX_FLYBACK_EN WCD9335_REG(0x6, 0xA4)
+#define WCD9XXX_FLYBACK_EN_DELAY_SEL_MASK GENMASK(6, 5)
+#define WCD9XXX_FLYBACK_EN_DELAY_26P25_US 0x40
+#define WCD9XXX_FLYBACK_EN_RESET_BY_EXT_MASK BIT(4)
+#define WCD9XXX_FLYBACK_EN_PWDN_WITHOUT_DELAY BIT(4)
+#define WCD9XXX_FLYBACK_EN_PWDN_WITH_DELAY 0
+#define WCD9XXX_RX_BIAS_FLYB_BUFF WCD9335_REG(0x6, 0xC7)
+#define WCD9XXX_RX_BIAS_FLYB_VNEG_5_UA_MASK GENMASK(7, 4)
+#define WCD9XXX_RX_BIAS_FLYB_VPOS_5_UA_MASK GENMASK(0, 3)
+#define WCD9XXX_HPH_L_EN WCD9335_REG(0x6, 0xD3)
+#define WCD9XXX_HPH_CONST_SEL_L_MASK GENMASK(7, 3)
+#define WCD9XXX_HPH_CONST_SEL_BYPASS 0
+#define WCD9XXX_HPH_CONST_SEL_LP_PATH 0x40
+#define WCD9XXX_HPH_CONST_SEL_HQ_PATH 0x80
+#define WCD9XXX_HPH_R_EN WCD9335_REG(0x6, 0xD6)
+#define WCD9XXX_HPH_REFBUFF_UHQA_CTL WCD9335_REG(0x6, 0xDD)
+#define WCD9XXX_HPH_REFBUFF_UHQA_GAIN_MASK GENMASK(2, 0)
+#define WCD9XXX_CLASSH_CTRL_VCL_2 WCD9335_REG(0x6, 0x9B)
+#define WCD9XXX_CLASSH_CTRL_VCL_2_VREF_FILT_1_MASK GENMASK(5, 4)
+#define WCD9XXX_CLASSH_CTRL_VCL_VREF_FILT_R_50KOHM 0x20
+#define WCD9XXX_CLASSH_CTRL_VCL_VREF_FILT_R_0KOHM 0x0
+#define WCD9XXX_CDC_RX1_RX_PATH_CTL WCD9335_REG(0xB, 0x55)
+#define WCD9XXX_CDC_RX2_RX_PATH_CTL WCD9335_REG(0xB, 0x69)
+#define WCD9XXX_CDC_CLK_RST_CTRL_MCLK_CONTROL WCD9335_REG(0xD, 0x41)
+#define WCD9XXX_CDC_CLK_RST_CTRL_MCLK_EN_MASK BIT(0)
+#define WCD9XXX_CDC_CLK_RST_CTRL_MCLK_11P3_EN_MASK BIT(1)
+#define WCD9XXX_CLASSH_CTRL_CCL_1 WCD9335_REG(0x6, 0x9C)
+#define WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_MASK GENMASK(7, 4)
+#define WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA 0x50
+#define WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_30MA 0x30
+
+#define CLSH_REQ_ENABLE true
+#define CLSH_REQ_DISABLE false
+#define WCD_USLEEP_RANGE 50
+
+enum {
+ DAC_GAIN_0DB = 0,
+ DAC_GAIN_0P2DB,
+ DAC_GAIN_0P4DB,
+ DAC_GAIN_0P6DB,
+ DAC_GAIN_0P8DB,
+ DAC_GAIN_M0P2DB,
+ DAC_GAIN_M0P4DB,
+ DAC_GAIN_M0P6DB,
+};
+
+static inline void wcd_enable_clsh_block(struct wcd_clsh_ctrl *ctrl,
+ bool enable)
+{
+ struct snd_soc_component *comp = ctrl->comp;
+
+ if ((enable && ++ctrl->clsh_users == 1) ||
+ (!enable && --ctrl->clsh_users == 0))
+ snd_soc_component_update_bits(comp, WCD9XXX_A_CDC_CLSH_CRC,
+ WCD9XXX_A_CDC_CLSH_CRC_CLK_EN_MASK,
+ enable);
+ if (ctrl->clsh_users < 0)
+ ctrl->clsh_users = 0;
+}
+
+static inline bool wcd_clsh_enable_status(struct snd_soc_component *comp)
+{
+ return snd_soc_component_read32(comp, WCD9XXX_A_CDC_CLSH_CRC) &
+ WCD9XXX_A_CDC_CLSH_CRC_CLK_EN_MASK;
+}
+
+static inline void wcd_clsh_set_buck_mode(struct snd_soc_component *comp,
+ int mode)
+{
+ /* set to HIFI */
+ if (mode == CLS_H_HIFI)
+ snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+ WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_MASK,
+ WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_UHQA);
+ else
+ snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+ WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_MASK,
+ WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_DEFAULT);
+}
+
+static inline void wcd_clsh_set_flyback_mode(struct snd_soc_component *comp,
+ int mode)
+{
+ /* set to HIFI */
+ if (mode == CLS_H_HIFI)
+ snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+ WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_MASK,
+ WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_UHQA);
+ else
+ snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+ WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_MASK,
+ WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_DEFAULT);
+}
+
+static void wcd_clsh_buck_ctrl(struct wcd_clsh_ctrl *ctrl,
+ int mode,
+ bool enable)
+{
+ struct snd_soc_component *comp = ctrl->comp;
+
+ /* enable/disable buck */
+ if ((enable && (++ctrl->buck_users == 1)) ||
+ (!enable && (--ctrl->buck_users == 0)))
+ snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+ WCD9XXX_A_ANA_RX_VPOS_EN_MASK,
+ enable << WCD9XXX_A_ANA_RX_VPOS_EN_SHIFT);
+ /*
+ * 500us sleep is required after buck enable/disable
+ * as per HW requirement
+ */
+ usleep_range(500, 500 + WCD_USLEEP_RANGE);
+}
+
+static void wcd_clsh_flyback_ctrl(struct wcd_clsh_ctrl *ctrl,
+ int mode,
+ bool enable)
+{
+ struct snd_soc_component *comp = ctrl->comp;
+
+ int vneg[] = {0x00, 0x40};
+
+ /* enable/disable flyback */
+ if ((enable && (++ctrl->flyback_users == 1)) ||
+ (!enable && (--ctrl->flyback_users == 0))) {
+ snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+ WCD9XXX_A_ANA_RX_VNEG_EN_MASK,
+ enable << WCD9XXX_A_ANA_RX_VNEG_EN_SHIFT);
+ /* 100usec delay is needed as per HW requirement */
+ usleep_range(100, 110);
+
+ if (enable && (WCD9335_IS_1_1(ctrl->codec_version))) {
+ wcd_clsh_set_flyback_mode(comp, CLS_H_HIFI);
+ snd_soc_component_update_bits(comp, WCD9XXX_FLYBACK_EN,
+ WCD9XXX_FLYBACK_EN_DELAY_SEL_MASK,
+ WCD9XXX_FLYBACK_EN_DELAY_26P25_US);
+ snd_soc_component_update_bits(comp, WCD9XXX_FLYBACK_EN,
+ WCD9XXX_FLYBACK_EN_RESET_BY_EXT_MASK,
+ WCD9XXX_FLYBACK_EN_PWDN_WITHOUT_DELAY);
+ vneg[0] = snd_soc_component_read32(comp,
+ WCD9XXX_A_ANA_RX_SUPPLIES);
+ vneg[0] &= ~(0x40);
+ vneg[1] = vneg[0] | 0x40;
+
+ snd_soc_component_write(comp,
+ WCD9XXX_A_ANA_RX_SUPPLIES, vneg[0]);
+ snd_soc_component_write(comp,
+ WCD9XXX_A_ANA_RX_SUPPLIES, vneg[1]);
+ /* 500usec delay is needed as per HW requirement */
+ usleep_range(500, 510);
+ snd_soc_component_update_bits(comp, WCD9XXX_FLYBACK_EN,
+ WCD9XXX_FLYBACK_EN_RESET_BY_EXT_MASK,
+ WCD9XXX_FLYBACK_EN_PWDN_WITH_DELAY);
+ wcd_clsh_set_flyback_mode(comp, mode);
+ }
+
+ }
+ /*
+ * 500us sleep is required after flyback enable/disable
+ * as per HW requirement
+ */
+ usleep_range(500, 500 + WCD_USLEEP_RANGE);
+}
+
+static void wcd_clsh_set_gain_path(struct wcd_clsh_ctrl *ctrl, int mode)
+{
+ struct snd_soc_component *comp = ctrl->comp;
+ int val = 0;
+
+ switch (mode) {
+ case CLS_H_NORMAL:
+ case CLS_AB:
+ val = WCD9XXX_HPH_CONST_SEL_BYPASS;
+ break;
+ case CLS_H_HIFI:
+ val = WCD9XXX_HPH_CONST_SEL_HQ_PATH;
+ break;
+ case CLS_H_LP:
+ val = WCD9XXX_HPH_CONST_SEL_LP_PATH;
+ break;
+ };
+
+ snd_soc_component_update_bits(comp, WCD9XXX_HPH_L_EN,
+ WCD9XXX_HPH_CONST_SEL_L_MASK,
+ val);
+
+ snd_soc_component_update_bits(comp, WCD9XXX_HPH_R_EN,
+ WCD9XXX_HPH_CONST_SEL_L_MASK,
+ val);
+}
+
+static void wcd_clsh_set_hph_mode(struct snd_soc_component *comp,
+ int mode)
+{
+ int val = 0, gain = 0, res_val;
+ int ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA;
+
+ res_val = WCD9XXX_CLASSH_CTRL_VCL_VREF_FILT_R_0KOHM;
+ switch (mode) {
+ case CLS_H_NORMAL:
+ res_val = WCD9XXX_CLASSH_CTRL_VCL_VREF_FILT_R_50KOHM;
+ val = WCD9XXX_A_ANA_HPH_PWR_LEVEL_NORMAL;
+ gain = DAC_GAIN_0DB;
+ ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA;
+ break;
+ case CLS_AB:
+ val = WCD9XXX_A_ANA_HPH_PWR_LEVEL_NORMAL;
+ gain = DAC_GAIN_0DB;
+ ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA;
+ break;
+ case CLS_H_HIFI:
+ val = WCD9XXX_A_ANA_HPH_PWR_LEVEL_UHQA;
+ gain = DAC_GAIN_M0P2DB;
+ ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA;
+ break;
+ case CLS_H_LP:
+ val = WCD9XXX_A_ANA_HPH_PWR_LEVEL_LP;
+ ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_30MA;
+ break;
+ };
+
+ snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_HPH,
+ WCD9XXX_A_ANA_HPH_PWR_LEVEL_MASK, val);
+ snd_soc_component_update_bits(comp, WCD9XXX_CLASSH_CTRL_VCL_2,
+ WCD9XXX_CLASSH_CTRL_VCL_2_VREF_FILT_1_MASK,
+ res_val);
+ if (mode != CLS_H_LP)
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_HPH_REFBUFF_UHQA_CTL,
+ WCD9XXX_HPH_REFBUFF_UHQA_GAIN_MASK,
+ gain);
+ snd_soc_component_update_bits(comp, WCD9XXX_CLASSH_CTRL_CCL_1,
+ WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_MASK,
+ ipeak);
+}
+
+static void wcd_clsh_set_flyback_current(struct snd_soc_component *comp,
+ int mode)
+{
+
+ snd_soc_component_update_bits(comp, WCD9XXX_RX_BIAS_FLYB_BUFF,
+ WCD9XXX_RX_BIAS_FLYB_VPOS_5_UA_MASK, 0x0A);
+ snd_soc_component_update_bits(comp, WCD9XXX_RX_BIAS_FLYB_BUFF,
+ WCD9XXX_RX_BIAS_FLYB_VNEG_5_UA_MASK, 0x0A);
+ /* Sleep needed to avoid click and pop as per HW requirement */
+ usleep_range(100, 110);
+}
+
+static void wcd_clsh_set_buck_regulator_mode(struct snd_soc_component *comp,
+ int mode)
+{
+ if (mode == CLS_AB)
+ snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+ WCD9XXX_A_ANA_RX_REGULATOR_MODE_MASK,
+ WCD9XXX_A_ANA_RX_REGULATOR_MODE_CLS_AB);
+ else
+ snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+ WCD9XXX_A_ANA_RX_REGULATOR_MODE_MASK,
+ WCD9XXX_A_ANA_RX_REGULATOR_MODE_CLS_H);
+}
+
+static void wcd_clsh_state_lo(struct wcd_clsh_ctrl *ctrl, int req_state,
+ bool is_enable, int mode)
+{
+ struct snd_soc_component *comp = ctrl->comp;
+
+ if (mode != CLS_AB) {
+ dev_err(comp->dev, "%s: LO cannot be in this mode: %d\n",
+ __func__, mode);
+ return;
+ }
+
+ if (is_enable) {
+ wcd_clsh_set_buck_regulator_mode(comp, mode);
+ wcd_clsh_set_buck_mode(comp, mode);
+ wcd_clsh_set_flyback_mode(comp, mode);
+ wcd_clsh_flyback_ctrl(ctrl, mode, true);
+ wcd_clsh_set_flyback_current(comp, mode);
+ wcd_clsh_buck_ctrl(ctrl, mode, true);
+ } else {
+ wcd_clsh_buck_ctrl(ctrl, mode, false);
+ wcd_clsh_flyback_ctrl(ctrl, mode, false);
+ wcd_clsh_set_flyback_mode(comp, CLS_H_NORMAL);
+ wcd_clsh_set_buck_mode(comp, CLS_H_NORMAL);
+ wcd_clsh_set_buck_regulator_mode(comp, CLS_H_NORMAL);
+ }
+}
+
+static void wcd_clsh_state_hph_r(struct wcd_clsh_ctrl *ctrl, int req_state,
+ bool is_enable, int mode)
+{
+ struct snd_soc_component *comp = ctrl->comp;
+
+ if (mode == CLS_H_NORMAL) {
+ dev_err(comp->dev, "%s: Normal mode not applicable for hph_r\n",
+ __func__);
+ return;
+ }
+
+ if (is_enable) {
+ if (mode != CLS_AB) {
+ wcd_enable_clsh_block(ctrl, true);
+ /*
+ * These K1 values depend on the Headphone Impedance
+ * For now it is assumed to be 16 ohm
+ */
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_CLSH_K1_MSB,
+ WCD9XXX_A_CDC_CLSH_K1_MSB_COEF_MASK,
+ 0x00);
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_CLSH_K1_LSB,
+ WCD9XXX_A_CDC_CLSH_K1_LSB_COEF_MASK,
+ 0xC0);
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_ENABLE);
+ }
+ wcd_clsh_set_buck_regulator_mode(comp, mode);
+ wcd_clsh_set_flyback_mode(comp, mode);
+ wcd_clsh_flyback_ctrl(ctrl, mode, true);
+ wcd_clsh_set_flyback_current(comp, mode);
+ wcd_clsh_set_buck_mode(comp, mode);
+ wcd_clsh_buck_ctrl(ctrl, mode, true);
+ wcd_clsh_set_hph_mode(comp, mode);
+ wcd_clsh_set_gain_path(ctrl, mode);
+ } else {
+ wcd_clsh_set_hph_mode(comp, CLS_H_NORMAL);
+
+ if (mode != CLS_AB) {
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_DISABLE);
+ wcd_enable_clsh_block(ctrl, false);
+ }
+ /* buck and flyback set to default mode and disable */
+ wcd_clsh_buck_ctrl(ctrl, CLS_H_NORMAL, false);
+ wcd_clsh_flyback_ctrl(ctrl, CLS_H_NORMAL, false);
+ wcd_clsh_set_flyback_mode(comp, CLS_H_NORMAL);
+ wcd_clsh_set_buck_mode(comp, CLS_H_NORMAL);
+ wcd_clsh_set_buck_regulator_mode(comp, CLS_H_NORMAL);
+ }
+}
+
+static void wcd_clsh_state_hph_l(struct wcd_clsh_ctrl *ctrl, int req_state,
+ bool is_enable, int mode)
+{
+ struct snd_soc_component *comp = ctrl->comp;
+
+ if (mode == CLS_H_NORMAL) {
+ dev_err(comp->dev, "%s: Normal mode not applicable for hph_l\n",
+ __func__);
+ return;
+ }
+
+ if (is_enable) {
+ if (mode != CLS_AB) {
+ wcd_enable_clsh_block(ctrl, true);
+ /*
+ * These K1 values depend on the Headphone Impedance
+ * For now it is assumed to be 16 ohm
+ */
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_CLSH_K1_MSB,
+ WCD9XXX_A_CDC_CLSH_K1_MSB_COEF_MASK,
+ 0x00);
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_CLSH_K1_LSB,
+ WCD9XXX_A_CDC_CLSH_K1_LSB_COEF_MASK,
+ 0xC0);
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_ENABLE);
+ }
+ wcd_clsh_set_buck_regulator_mode(comp, mode);
+ wcd_clsh_set_flyback_mode(comp, mode);
+ wcd_clsh_flyback_ctrl(ctrl, mode, true);
+ wcd_clsh_set_flyback_current(comp, mode);
+ wcd_clsh_set_buck_mode(comp, mode);
+ wcd_clsh_buck_ctrl(ctrl, mode, true);
+ wcd_clsh_set_hph_mode(comp, mode);
+ wcd_clsh_set_gain_path(ctrl, mode);
+ } else {
+ wcd_clsh_set_hph_mode(comp, CLS_H_NORMAL);
+
+ if (mode != CLS_AB) {
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_DISABLE);
+ wcd_enable_clsh_block(ctrl, false);
+ }
+ /* set buck and flyback to Default Mode */
+ wcd_clsh_buck_ctrl(ctrl, CLS_H_NORMAL, false);
+ wcd_clsh_flyback_ctrl(ctrl, CLS_H_NORMAL, false);
+ wcd_clsh_set_flyback_mode(comp, CLS_H_NORMAL);
+ wcd_clsh_set_buck_mode(comp, CLS_H_NORMAL);
+ wcd_clsh_set_buck_regulator_mode(comp, CLS_H_NORMAL);
+ }
+}
+
+static void wcd_clsh_state_ear(struct wcd_clsh_ctrl *ctrl, int req_state,
+ bool is_enable, int mode)
+{
+ struct snd_soc_component *comp = ctrl->comp;
+
+ if (mode != CLS_H_NORMAL) {
+ dev_err(comp->dev, "%s: mode: %d cannot be used for EAR\n",
+ __func__, mode);
+ return;
+ }
+
+ if (is_enable) {
+ wcd_enable_clsh_block(ctrl, true);
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_ENABLE);
+ wcd_clsh_set_buck_mode(comp, mode);
+ wcd_clsh_set_flyback_mode(comp, mode);
+ wcd_clsh_flyback_ctrl(ctrl, mode, true);
+ wcd_clsh_set_flyback_current(comp, mode);
+ wcd_clsh_buck_ctrl(ctrl, mode, true);
+ } else {
+ snd_soc_component_update_bits(comp,
+ WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+ WCD9XXX_A_CDC_RX_PATH_CLSH_DISABLE);
+ wcd_enable_clsh_block(ctrl, false);
+ wcd_clsh_buck_ctrl(ctrl, mode, false);
+ wcd_clsh_flyback_ctrl(ctrl, mode, false);
+ wcd_clsh_set_flyback_mode(comp, CLS_H_NORMAL);
+ wcd_clsh_set_buck_mode(comp, CLS_H_NORMAL);
+ }
+}
+
+static int _wcd_clsh_ctrl_set_state(struct wcd_clsh_ctrl *ctrl, int req_state,
+ bool is_enable, int mode)
+{
+ switch (req_state) {
+ case WCD_CLSH_STATE_EAR:
+ wcd_clsh_state_ear(ctrl, req_state, is_enable, mode);
+ break;
+ case WCD_CLSH_STATE_HPHL:
+ wcd_clsh_state_hph_l(ctrl, req_state, is_enable, mode);
+ break;
+ case WCD_CLSH_STATE_HPHR:
+ wcd_clsh_state_hph_r(ctrl, req_state, is_enable, mode);
+ break;
+ break;
+ case WCD_CLSH_STATE_LO:
+ wcd_clsh_state_lo(ctrl, req_state, is_enable, mode);
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * Function: wcd_clsh_is_state_valid
+ * Params: state
+ * Description:
+ * Provides information on valid states of Class H configuration
+ */
+static bool wcd_clsh_is_state_valid(int state)
+{
+ switch (state) {
+ case WCD_CLSH_STATE_IDLE:
+ case WCD_CLSH_STATE_EAR:
+ case WCD_CLSH_STATE_HPHL:
+ case WCD_CLSH_STATE_HPHR:
+ case WCD_CLSH_STATE_LO:
+ return true;
+ default:
+ return false;
+ };
+}
+
+/*
+ * Function: wcd_clsh_fsm
+ * Params: ctrl, req_state, req_type, clsh_event
+ * Description:
+ * This function handles PRE DAC and POST DAC conditions of different devices
+ * and updates class H configuration of different combination of devices
+ * based on validity of their states. ctrl will contain current
+ * class h state information
+ */
+int wcd_clsh_ctrl_set_state(struct wcd_clsh_ctrl *ctrl,
+ enum wcd_clsh_event clsh_event,
+ int nstate,
+ enum wcd_clsh_mode mode)
+{
+ struct snd_soc_component *comp = ctrl->comp;
+
+ if (nstate == ctrl->state)
+ return 0;
+
+ if (!wcd_clsh_is_state_valid(nstate)) {
+ dev_err(comp->dev, "Class-H not a valid new state:\n");
+ return -EINVAL;
+ }
+
+ switch (clsh_event) {
+ case WCD_CLSH_EVENT_PRE_DAC:
+ _wcd_clsh_ctrl_set_state(ctrl, nstate, CLSH_REQ_ENABLE, mode);
+ break;
+ case WCD_CLSH_EVENT_POST_PA:
+ _wcd_clsh_ctrl_set_state(ctrl, nstate, CLSH_REQ_DISABLE, mode);
+ break;
+ };
+
+ ctrl->state = nstate;
+ ctrl->mode = mode;
+
+ return 0;
+}
+
+int wcd_clsh_ctrl_get_state(struct wcd_clsh_ctrl *ctrl)
+{
+ return ctrl->state;
+}
+
+struct wcd_clsh_ctrl *wcd_clsh_ctrl_alloc(struct snd_soc_component *comp,
+ int version)
+{
+ struct wcd_clsh_ctrl *ctrl;
+
+ ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
+ if (!ctrl)
+ return ERR_PTR(-ENOMEM);
+
+ ctrl->state = WCD_CLSH_STATE_IDLE;
+ ctrl->comp = comp;
+
+ return ctrl;
+}
+
+void wcd_clsh_ctrl_free(struct wcd_clsh_ctrl *ctrl)
+{
+ kfree(ctrl);
+}
diff --git a/sound/soc/codecs/wcd-clsh.h b/sound/soc/codecs/wcd-clsh.h
new file mode 100644
index 000000000000..a902f9893467
--- /dev/null
+++ b/sound/soc/codecs/wcd-clsh.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _WCD_CLSH_V2_H_
+#define _WCD_CLSH_V2_H_
+#include <sound/soc.h>
+
+enum wcd_clsh_event {
+ WCD_CLSH_EVENT_PRE_DAC = 1,
+ WCD_CLSH_EVENT_POST_PA,
+};
+
+/*
+ * Basic states for Class H state machine.
+ * represented as a bit mask within a u8 data type
+ * bit 0: EAR mode
+ * bit 1: HPH Left mode
+ * bit 2: HPH Right mode
+ * bit 3: Lineout mode
+ */
+#define WCD_CLSH_STATE_IDLE 0
+#define WCD_CLSH_STATE_EAR BIT(0)
+#define WCD_CLSH_STATE_HPHL BIT(1)
+#define WCD_CLSH_STATE_HPHR BIT(2)
+#define WCD_CLSH_STATE_LO BIT(3)
+#define WCD_CLSH_STATE_MAX 4
+#define NUM_CLSH_STATES_V2 BIT(WCD_CLSH_STATE_MAX)
+
+enum wcd_clsh_mode {
+ CLS_H_NORMAL = 0, /* Class-H Default */
+ CLS_H_HIFI, /* Class-H HiFi */
+ CLS_H_LP, /* Class-H Low Power */
+ CLS_AB, /* Class-AB */
+ CLS_H_LOHIFI, /* LoHIFI */
+ CLS_NONE, /* None of the above modes */
+};
+
+struct wcd_clsh_ctrl;
+
+extern struct wcd_clsh_ctrl *wcd_clsh_ctrl_alloc(
+ struct snd_soc_component *component,
+ int version);
+extern void wcd_clsh_ctrl_free(struct wcd_clsh_ctrl *ctrl);
+extern int wcd_clsh_ctrl_get_state(struct wcd_clsh_ctrl *ctrl);
+extern int wcd_clsh_ctrl_set_state(struct wcd_clsh_ctrl *ctrl,
+ enum wcd_clsh_event event,
+ int state,
+ enum wcd_clsh_mode mode);
+
+#endif /* _WCD_CLSH_V2_H_ */
diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
index bd9de5d45fa9..06c73699f16f 100644
--- a/sound/soc/codecs/wcd9335.c
+++ b/sound/soc/codecs/wcd9335.c
@@ -21,6 +21,7 @@
#include <dt-bindings/mfd/wcd9335.h>
#include <linux/mfd/wcd9335/wcd9335.h>
#include <linux/mfd/wcd9335/registers.h>
+#include "wcd-clsh.h"

#define WCD9335_RATES_MASK (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000 |\
@@ -181,6 +182,7 @@ struct wcd9335_codec {
int sido_ccl_cnt;
enum wcd_clock_type clk_type;

+ struct wcd_clsh_ctrl *clsh_ctrl;
u32 hph_mode;
};

@@ -1066,6 +1068,13 @@ static int wcd9335_codec_probe(struct snd_soc_component *component)
int i;

snd_soc_component_init_regmap(component, wcd->regmap);
+ /* Class-H Init*/
+ wcd->clsh_ctrl = wcd_clsh_ctrl_alloc(component, wcd->version);
+ if (IS_ERR(wcd->clsh_ctrl))
+ return PTR_ERR(wcd->clsh_ctrl);
+
+ /* Default HPH Mode to Class-H HiFi */
+ wcd->hph_mode = CLS_H_HIFI;
wcd->component = component;

wcd9335_codec_init(component);
@@ -1080,6 +1089,7 @@ static void wcd9335_codec_remove(struct snd_soc_component *comp)
{
struct wcd9335_codec *wcd = dev_get_drvdata(comp->dev);

+ wcd_clsh_ctrl_free(wcd->clsh_ctrl);
free_irq(regmap_irq_get_virq(wcd->irq_data, WCD9335_IRQ_SLIMBUS), wcd);
}

--
2.16.2