@@ -56,4 +56,14 @@ config TYPEC_MUX_PTN36502
Say Y or M if your system has a NXP PTN36502 Type-C redriver chip
found on some devices with a Type-C port.
+config TYPEC_MUX_WCD939X_USBSS
+ tristate "Qualcomm WCD939x USBSS Analog Audio Switch driver"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Driver for the Qualcomm WCD939x Audio Codec USBSS domain which
+ provides support for muxing analog audio and sideband signals on a
+ common USB Type-C connector.
+ If compiled as a module, the module will be named wcd939x-usbss.
+
endmenu
@@ -6,3 +6,4 @@ obj-$(CONFIG_TYPEC_MUX_PI3USB30532) += pi3usb30532.o
obj-$(CONFIG_TYPEC_MUX_INTEL_PMC) += intel_pmc_mux.o
obj-$(CONFIG_TYPEC_MUX_NB7VPQ904M) += nb7vpq904m.o
obj-$(CONFIG_TYPEC_MUX_PTN36502) += ptn36502.o
+obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) += wcd939x-usbss.o
new file mode 100644
@@ -0,0 +1,779 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (C) 2023 Linaro Ltd.
+ */
+
+#include <linux/bits.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/usb/typec_dp.h>
+#include <linux/usb/typec_mux.h>
+
+#define WCD_USBSS_PMP_OUT1 0x2
+
+#define WCD_USBSS_DP_DN_MISC1 0x20
+
+#define WCD_USBSS_DP_DN_MISC1_DP_PCOMP_2X_DYN_BST_ON_EN BIT(3)
+#define WCD_USBSS_DP_DN_MISC1_DN_PCOMP_2X_DYN_BST_ON_EN BIT(0)
+
+#define WCD_USBSS_MG1_EN 0x24
+
+#define WCD_USBSS_MG1_EN_CT_SNS_EN BIT(1)
+
+#define WCD_USBSS_MG1_BIAS 0x25
+
+#define WCD_USBSS_MG1_BIAS_PCOMP_DYN_BST_EN BIT(3)
+
+#define WCD_USBSS_MG1_MISC 0x27
+
+#define WCD_USBSS_MG1_MISC_PCOMP_2X_DYN_BST_ON_EN BIT(5)
+
+#define WCD_USBSS_MG2_EN 0x28
+
+#define WCD_USBSS_MG2_EN_CT_SNS_EN BIT(1)
+
+#define WCD_USBSS_MG2_BIAS 0x29
+
+#define WCD_USBSS_MG2_BIAS_PCOMP_DYN_BST_EN BIT(3)
+
+#define WCD_USBSS_MG2_MISC 0x30
+
+#define WCD_USBSS_MG2_MISC_PCOMP_2X_DYN_BST_ON_EN BIT(5)
+
+#define WCD_USBSS_DISP_AUXP_THRESH 0x80
+
+#define WCD_USBSS_DISP_AUXP_THRESH_DISP_AUXP_OVPON_CM GENMASK(7, 5)
+
+#define WCD_USBSS_DISP_AUXP_CTL 0x81
+
+#define WCD_USBSS_DISP_AUXP_CTL_LK_CANCEL_TRK_COEFF GENMASK(2, 0)
+
+#define WCD_USBSS_CPLDO_CTL2 0xa1
+
+#define WCD_USBSS_SWITCH_SETTINGS_ENABLE 0x403
+
+#define WCD_USBSS_SWITCH_SETTINGS_ENABLE_DEVICE_ENABLE BIT(7)
+#define WCD_USBSS_SWITCH_SETTINGS_ENABLE_DP_AUXP_TO_MGX_SWITCHES BIT(6)
+#define WCD_USBSS_SWITCH_SETTINGS_ENABLE_DP_AUXM_TO_MGX_SWITCHES BIT(5)
+#define WCD_USBSS_SWITCH_SETTINGS_ENABLE_DNL_SWITCHES BIT(4)
+#define WCD_USBSS_SWITCH_SETTINGS_ENABLE_DPR_SWITCHES BIT(3)
+#define WCD_USBSS_SWITCH_SETTINGS_ENABLE_SENSE_SWITCHES BIT(2)
+#define WCD_USBSS_SWITCH_SETTINGS_ENABLE_MIC_SWITCHES BIT(1)
+#define WCD_USBSS_SWITCH_SETTINGS_ENABLE_AGND_SWITCHES BIT(0)
+
+#define WCD_USBSS_SWITCH_SELECT0 0x404
+
+#define WCD_USBSS_SWITCH_SELECT0_DP_AUXP_SWITCHES BIT(7) /* 1-> MG2 */
+#define WCD_USBSS_SWITCH_SELECT0_DP_AUXM_SWITCHES BIT(6) /* 1-> MG2 */
+#define WCD_USBSS_SWITCH_SELECT0_DNL_SWITCHES GENMASK(5, 4)
+#define WCD_USBSS_SWITCH_SELECT0_DPR_SWITCHES GENMASK(3, 2)
+#define WCD_USBSS_SWITCH_SELECT0_SENSE_SWITCHES BIT(1) /* 1-> SBU2 */
+#define WCD_USBSS_SWITCH_SELECT0_MIC_SWITCHES BIT(0) /* 1-> MG2 */
+
+#define WCD_USBSS_SWITCH_SELECT0_DNL_SWITCH_L 0
+#define WCD_USBSS_SWITCH_SELECT0_DNL_SWITCH_DN 1
+#define WCD_USBSS_SWITCH_SELECT0_DNL_SWITCH_DN2 2
+
+#define WCD_USBSS_SWITCH_SELECT0_DPR_SWITCH_R 0
+#define WCD_USBSS_SWITCH_SELECT0_DPR_SWITCH_DP 1
+#define WCD_USBSS_SWITCH_SELECT0_DPR_SWITCH_DR2 2
+
+#define WCD_USBSS_SWITCH_SELECT1 0x405
+
+#define WCD_USBSS_SWITCH_SELECT1_AGND_SWITCHES BIT(0) /* 1-> MG2 */
+
+#define WCD_USBSS_DELAY_R_SW 0x40d
+#define WCD_USBSS_DELAY_MIC_SW 0x40e
+#define WCD_USBSS_DELAY_SENSE_SW 0x40f
+#define WCD_USBSS_DELAY_GND_SW 0x410
+#define WCD_USBSS_DELAY_L_SW 0x411
+
+#define WCD_USBSS_FUNCTION_ENABLE 0x413
+
+#define WCD_USBSS_FUNCTION_ENABLE_SOURCE_SELECT GENMASK(1, 0)
+
+#define WCD_USBSS_FUNCTION_ENABLE_SOURCE_SELECT_MANUAL 1
+#define WCD_USBSS_FUNCTION_ENABLE_SOURCE_SELECT_AUDIO_FSM 2
+
+#define WCD_USBSS_EQUALIZER1 0x415
+
+#define WCD_USBSS_EQUALIZER1_EQ_EN BIT(7)
+#define WCD_USBSS_EQUALIZER1_BW_SETTINGS GENMASK(6, 3)
+
+#define WCD_USBSS_USB_SS_CNTL 0x419
+
+#define WCD_USBSS_USB_SS_CNTL_STANDBY_STATE BIT(4)
+#define WCD_USBSS_USB_SS_CNTL_RCO_EN BIT(3)
+#define WCD_USBSS_USB_SS_CNTL_USB_SS_MODE GENMASK(2, 0)
+
+#define WCD_USBSS_USB_SS_CNTL_USB_SS_MODE_AATC 2
+#define WCD_USBSS_USB_SS_CNTL_USB_SS_MODE_USB 5
+
+#define WCD_USBSS_AUDIO_FSM_START 0x433
+
+#define WCD_USBSS_AUDIO_FSM_START_AUDIO_FSM_AUDIO_TRIG BIT(0)
+
+#define WCD_USBSS_RATIO_SPKR_REXT_L_LSB 0x461
+#define WCD_USBSS_RATIO_SPKR_REXT_L_MSB 0x462
+#define WCD_USBSS_RATIO_SPKR_REXT_R_LSB 0x463
+#define WCD_USBSS_RATIO_SPKR_REXT_R_MSB 0x464
+#define WCD_USBSS_AUD_COEF_L_K0_0 0x475
+#define WCD_USBSS_AUD_COEF_L_K0_1 0x476
+#define WCD_USBSS_AUD_COEF_L_K0_2 0x477
+#define WCD_USBSS_AUD_COEF_L_K1_0 0x478
+#define WCD_USBSS_AUD_COEF_L_K1_1 0x479
+#define WCD_USBSS_AUD_COEF_L_K2_0 0x47a
+#define WCD_USBSS_AUD_COEF_L_K2_1 0x47b
+#define WCD_USBSS_AUD_COEF_L_K3_0 0x47c
+#define WCD_USBSS_AUD_COEF_L_K3_1 0x47d
+#define WCD_USBSS_AUD_COEF_L_K4_0 0x47e
+#define WCD_USBSS_AUD_COEF_L_K4_1 0x47f
+#define WCD_USBSS_AUD_COEF_L_K5_0 0x480
+#define WCD_USBSS_AUD_COEF_L_K5_1 0x481
+#define WCD_USBSS_AUD_COEF_R_K0_0 0x482
+#define WCD_USBSS_AUD_COEF_R_K0_1 0x483
+#define WCD_USBSS_AUD_COEF_R_K0_2 0x484
+#define WCD_USBSS_AUD_COEF_R_K1_0 0x485
+#define WCD_USBSS_AUD_COEF_R_K1_1 0x486
+#define WCD_USBSS_AUD_COEF_R_K2_0 0x487
+#define WCD_USBSS_AUD_COEF_R_K2_1 0x488
+#define WCD_USBSS_AUD_COEF_R_K3_0 0x489
+#define WCD_USBSS_AUD_COEF_R_K3_1 0x48a
+#define WCD_USBSS_AUD_COEF_R_K4_0 0x48b
+#define WCD_USBSS_AUD_COEF_R_K4_1 0x48c
+#define WCD_USBSS_AUD_COEF_R_K5_0 0x48d
+#define WCD_USBSS_AUD_COEF_R_K5_1 0x48e
+#define WCD_USBSS_GND_COEF_L_K0_0 0x48f
+#define WCD_USBSS_GND_COEF_L_K0_1 0x490
+#define WCD_USBSS_GND_COEF_L_K0_2 0x491
+#define WCD_USBSS_GND_COEF_L_K1_0 0x492
+#define WCD_USBSS_GND_COEF_L_K1_1 0x493
+#define WCD_USBSS_GND_COEF_L_K2_0 0x494
+#define WCD_USBSS_GND_COEF_L_K2_1 0x495
+#define WCD_USBSS_GND_COEF_L_K3_0 0x496
+#define WCD_USBSS_GND_COEF_L_K3_1 0x497
+#define WCD_USBSS_GND_COEF_L_K4_0 0x498
+#define WCD_USBSS_GND_COEF_L_K4_1 0x499
+#define WCD_USBSS_GND_COEF_L_K5_0 0x49a
+#define WCD_USBSS_GND_COEF_L_K5_1 0x49b
+#define WCD_USBSS_GND_COEF_R_K0_0 0x49c
+#define WCD_USBSS_GND_COEF_R_K0_1 0x49d
+#define WCD_USBSS_GND_COEF_R_K0_2 0x49e
+#define WCD_USBSS_GND_COEF_R_K1_0 0x49f
+#define WCD_USBSS_GND_COEF_R_K1_1 0x4a0
+#define WCD_USBSS_GND_COEF_R_K2_0 0x4a1
+#define WCD_USBSS_GND_COEF_R_K2_1 0x4a2
+#define WCD_USBSS_GND_COEF_R_K3_0 0x4a3
+#define WCD_USBSS_GND_COEF_R_K3_1 0x4a4
+#define WCD_USBSS_GND_COEF_R_K4_0 0x4a5
+#define WCD_USBSS_GND_COEF_R_K4_1 0x4a6
+#define WCD_USBSS_GND_COEF_R_K5_0 0x4a7
+#define WCD_USBSS_GND_COEF_R_K5_1 0x4a8
+
+#define WCD_USBSS_MAX_REGISTER 0x4c1
+
+struct wcd939x_usbss {
+ struct i2c_client *client;
+ struct gpio_desc *reset_gpio;
+ struct regulator *vdd_supply;
+
+ /* used to serialize concurrent change requests */
+ struct mutex lock;
+
+ struct typec_switch_dev *sw;
+ struct typec_mux_dev *mux;
+
+ struct regmap *regmap;
+
+ struct typec_mux *codec;
+ struct typec_switch *codec_switch;
+
+ enum typec_orientation orientation;
+ unsigned long mode;
+ unsigned int svid;
+};
+
+static const struct regmap_range_cfg wcd939x_usbss_ranges[] = {
+ {
+ .range_min = 0,
+ .range_max = WCD_USBSS_MAX_REGISTER,
+ .selector_reg = 0x0,
+ .selector_mask = 0xff,
+ .selector_shift = 0,
+ .window_start = 0,
+ .window_len = 0x100,
+ },
+};
+
+static const struct regmap_config wcd939x_usbss_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = WCD_USBSS_MAX_REGISTER,
+ .ranges = wcd939x_usbss_ranges,
+ .num_ranges = ARRAY_SIZE(wcd939x_usbss_ranges),
+};
+
+/* Linearlizer coefficients for 32ohm load */
+static const struct {
+ unsigned int offset;
+ unsigned int mask;
+ unsigned int value;
+} wcd939x_usbss_coeff_init[] = {
+ { WCD_USBSS_AUD_COEF_L_K5_0, GENMASK(7, 0), 0x39 },
+ { WCD_USBSS_AUD_COEF_R_K5_0, GENMASK(7, 0), 0x39 },
+ { WCD_USBSS_GND_COEF_L_K2_0, GENMASK(7, 0), 0xe8 },
+ { WCD_USBSS_GND_COEF_L_K4_0, GENMASK(7, 0), 0x73 },
+ { WCD_USBSS_GND_COEF_R_K2_0, GENMASK(7, 0), 0xe8 },
+ { WCD_USBSS_GND_COEF_R_K4_0, GENMASK(7, 0), 0x73 },
+ { WCD_USBSS_RATIO_SPKR_REXT_L_LSB, GENMASK(7, 0), 0x00 },
+ { WCD_USBSS_RATIO_SPKR_REXT_L_MSB, GENMASK(6, 0), 0x04 },
+ { WCD_USBSS_RATIO_SPKR_REXT_R_LSB, GENMASK(7, 0), 0x00 },
+ { WCD_USBSS_RATIO_SPKR_REXT_R_MSB, GENMASK(6, 0), 0x04 },
+};
+
+static int wcd939x_usbss_set(struct wcd939x_usbss *usbss)
+{
+ bool reverse = (usbss->orientation == TYPEC_ORIENTATION_REVERSE);
+ bool enable_audio = false;
+ bool enable_usb = false;
+ bool enable_dp = false;
+ int ret;
+
+ /* USB Mode */
+ if (usbss->mode < TYPEC_STATE_MODAL ||
+ (!usbss->svid && (usbss->mode == TYPEC_MODE_USB2 ||
+ usbss->mode == TYPEC_MODE_USB3))) {
+ enable_usb = true;
+ } else if (usbss->svid) {
+ switch (usbss->mode) {
+ /* DP Only */
+ case TYPEC_DP_STATE_C:
+ case TYPEC_DP_STATE_E:
+ enable_dp = true;
+ break;
+
+ /* DP + USB */
+ case TYPEC_DP_STATE_D:
+ case TYPEC_DP_STATE_F:
+ enable_usb = true;
+ enable_dp = true;
+ break;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+ } else if (usbss->mode == TYPEC_MODE_AUDIO) {
+ enable_audio = true;
+ } else {
+ return -EOPNOTSUPP;
+ }
+
+ /* Disable all switches */
+ ret = regmap_clear_bits(usbss->regmap, WCD_USBSS_SWITCH_SETTINGS_ENABLE,
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DP_AUXP_TO_MGX_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DP_AUXM_TO_MGX_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DPR_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DNL_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_SENSE_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_MIC_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_AGND_SWITCHES);
+ if (ret)
+ return ret;
+
+ /* Clear switches */
+ ret = regmap_clear_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT0,
+ WCD_USBSS_SWITCH_SELECT0_DP_AUXP_SWITCHES |
+ WCD_USBSS_SWITCH_SELECT0_DP_AUXM_SWITCHES |
+ WCD_USBSS_SWITCH_SELECT0_DPR_SWITCHES |
+ WCD_USBSS_SWITCH_SELECT0_DNL_SWITCHES |
+ WCD_USBSS_SWITCH_SELECT0_SENSE_SWITCHES |
+ WCD_USBSS_SWITCH_SELECT0_MIC_SWITCHES);
+ if (ret)
+ return ret;
+
+ ret = regmap_clear_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT1,
+ WCD_USBSS_SWITCH_SELECT1_AGND_SWITCHES);
+ if (ret)
+ return ret;
+
+ /* Enable OVP_MG1_BIAS PCOMP_DYN_BST_EN */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_MG1_BIAS,
+ WCD_USBSS_MG1_BIAS_PCOMP_DYN_BST_EN);
+ if (ret)
+ return ret;
+
+ /* Enable OVP_MG2_BIAS PCOMP_DYN_BST_EN */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_MG2_BIAS,
+ WCD_USBSS_MG2_BIAS_PCOMP_DYN_BST_EN);
+ if (ret)
+ return ret;
+
+ /* Disable Equalizer in safe mode */
+ ret = regmap_clear_bits(usbss->regmap, WCD_USBSS_EQUALIZER1,
+ WCD_USBSS_EQUALIZER1_EQ_EN);
+ if (ret)
+ return ret;
+
+ /* Start FSM with all disabled, force write */
+ ret = regmap_write_bits(usbss->regmap, WCD_USBSS_AUDIO_FSM_START,
+ WCD_USBSS_AUDIO_FSM_START_AUDIO_FSM_AUDIO_TRIG,
+ WCD_USBSS_AUDIO_FSM_START_AUDIO_FSM_AUDIO_TRIG);
+
+ /* 35us to allow the SBU switch to turn off */
+ usleep_range(35, 1000);
+
+ /* Setup Audio Accessory mux/switch */
+ if (enable_audio) {
+ int i;
+
+ /*
+ * AATC switch configuration:
+ * "Normal":
+ * - R: DNR
+ * - L: DNL
+ * - Sense: GSBU2
+ * - Mic: MG1
+ * - AGND: MG2
+ * "Swapped":
+ * - R: DNR
+ * - L: DNL
+ * - Sense: GSBU1
+ * - Mic: MG2
+ * - AGND: MG1
+ * Swapped information is given by the codec MBHC logic
+ */
+
+ /* Set AATC mode */
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_USB_SS_CNTL,
+ WCD_USBSS_USB_SS_CNTL_USB_SS_MODE,
+ FIELD_PREP(WCD_USBSS_USB_SS_CNTL_USB_SS_MODE,
+ WCD_USBSS_USB_SS_CNTL_USB_SS_MODE_AATC));
+ if (ret)
+ return ret;
+
+ /* Select L for DNL_SWITCHES and R for DPR_SWITCHES */
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT0,
+ WCD_USBSS_SWITCH_SELECT0_DPR_SWITCHES |
+ WCD_USBSS_SWITCH_SELECT0_DNL_SWITCHES,
+ FIELD_PREP(WCD_USBSS_SWITCH_SELECT0_DNL_SWITCHES,
+ WCD_USBSS_SWITCH_SELECT0_DNL_SWITCH_L) |
+ FIELD_PREP(WCD_USBSS_SWITCH_SELECT0_DPR_SWITCHES,
+ WCD_USBSS_SWITCH_SELECT0_DPR_SWITCH_R));
+ if (ret)
+ return ret;
+
+ if (reverse)
+ /* Select MG2 for MIC, SBU1 for Sense */
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT0,
+ WCD_USBSS_SWITCH_SELECT0_MIC_SWITCHES,
+ WCD_USBSS_SWITCH_SELECT0_MIC_SWITCHES);
+ else
+ /* Select MG1 for MIC, SBU2 for Sense */
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT0,
+ WCD_USBSS_SWITCH_SELECT0_SENSE_SWITCHES,
+ WCD_USBSS_SWITCH_SELECT0_SENSE_SWITCHES);
+ if (ret)
+ return ret;
+
+ if (reverse)
+ /* Disable OVP_MG1_BIAS PCOMP_DYN_BST_EN */
+ ret = regmap_clear_bits(usbss->regmap, WCD_USBSS_MG1_BIAS,
+ WCD_USBSS_MG1_BIAS_PCOMP_DYN_BST_EN);
+ else
+ /* Disable OVP_MG2_BIAS PCOMP_DYN_BST_EN */
+ ret = regmap_clear_bits(usbss->regmap, WCD_USBSS_MG2_BIAS,
+ WCD_USBSS_MG2_BIAS_PCOMP_DYN_BST_EN);
+ if (ret)
+ return ret;
+
+ /* Enable SENSE, MIC switches */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_SWITCH_SETTINGS_ENABLE,
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_SENSE_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_MIC_SWITCHES);
+ if (ret)
+ return ret;
+
+ if (reverse)
+ /* Select MG1 for AGND_SWITCHES */
+ ret = regmap_clear_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT1,
+ WCD_USBSS_SWITCH_SELECT1_AGND_SWITCHES);
+ else
+ /* Select MG2 for AGND_SWITCHES */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT1,
+ WCD_USBSS_SWITCH_SELECT1_AGND_SWITCHES);
+ if (ret)
+ return ret;
+
+ /* Enable AGND switches */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_SWITCH_SETTINGS_ENABLE,
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_AGND_SWITCHES);
+ if (ret)
+ return ret;
+
+ /* Enable DPR, DNL switches */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_SWITCH_SETTINGS_ENABLE,
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DNL_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DPR_SWITCHES);
+ if (ret)
+ return ret;
+
+ /* Setup FSM delays */
+ ret = regmap_write(usbss->regmap, WCD_USBSS_DELAY_L_SW, 0x02);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(usbss->regmap, WCD_USBSS_DELAY_R_SW, 0x02);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(usbss->regmap, WCD_USBSS_DELAY_MIC_SW, 0x01);
+ if (ret)
+ return ret;
+
+ /* Start FSM, force write */
+ ret = regmap_write_bits(usbss->regmap, WCD_USBSS_AUDIO_FSM_START,
+ WCD_USBSS_AUDIO_FSM_START_AUDIO_FSM_AUDIO_TRIG,
+ WCD_USBSS_AUDIO_FSM_START_AUDIO_FSM_AUDIO_TRIG);
+ if (ret)
+ return ret;
+
+ /* Default Linearlizer coefficients */
+ for (i = 0; i < ARRAY_SIZE(wcd939x_usbss_coeff_init); ++i)
+ regmap_update_bits(usbss->regmap,
+ wcd939x_usbss_coeff_init[i].offset,
+ wcd939x_usbss_coeff_init[i].mask,
+ wcd939x_usbss_coeff_init[i].value);
+
+ return 0;
+ }
+
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_USB_SS_CNTL,
+ WCD_USBSS_USB_SS_CNTL_USB_SS_MODE,
+ FIELD_PREP(WCD_USBSS_USB_SS_CNTL_USB_SS_MODE,
+ WCD_USBSS_USB_SS_CNTL_USB_SS_MODE_USB));
+ if (ret)
+ return ret;
+
+ /* Enable USB muxes */
+ if (enable_usb) {
+ /* Do not enable Equalizer in safe mode */
+ if (usbss->mode != TYPEC_STATE_SAFE) {
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_EQUALIZER1,
+ WCD_USBSS_EQUALIZER1_EQ_EN);
+ if (ret)
+ return ret;
+ }
+
+ /* Select DN for DNL_SWITCHES and DP for DPR_SWITCHES */
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT0,
+ WCD_USBSS_SWITCH_SELECT0_DPR_SWITCHES |
+ WCD_USBSS_SWITCH_SELECT0_DNL_SWITCHES,
+ FIELD_PREP(WCD_USBSS_SWITCH_SELECT0_DNL_SWITCHES,
+ WCD_USBSS_SWITCH_SELECT0_DNL_SWITCH_DN) |
+ FIELD_PREP(WCD_USBSS_SWITCH_SELECT0_DPR_SWITCHES,
+ WCD_USBSS_SWITCH_SELECT0_DPR_SWITCH_DP));
+ if (ret)
+ return ret;
+
+ /* Enable DNL_SWITCHES and DPR_SWITCHES */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_SWITCH_SETTINGS_ENABLE,
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DPR_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DNL_SWITCHES);
+ if (ret)
+ return ret;
+ }
+
+ /* Enable DP AUX muxes */
+ if (enable_dp) {
+ /* Update Leakage Canceller Coefficient for AUXP pins */
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_DISP_AUXP_CTL,
+ WCD_USBSS_DISP_AUXP_CTL_LK_CANCEL_TRK_COEFF,
+ FIELD_PREP(WCD_USBSS_DISP_AUXP_CTL_LK_CANCEL_TRK_COEFF,
+ 5));
+ if (ret)
+ return ret;
+
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_DISP_AUXP_THRESH,
+ WCD_USBSS_DISP_AUXP_THRESH_DISP_AUXP_OVPON_CM);
+ if (ret)
+ return ret;
+
+ if (reverse)
+ /* Select MG2 for AUXP and MG1 for AUXM */
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT0,
+ WCD_USBSS_SWITCH_SELECT0_DP_AUXP_SWITCHES |
+ WCD_USBSS_SWITCH_SELECT0_DP_AUXM_SWITCHES,
+ WCD_USBSS_SWITCH_SELECT0_DP_AUXP_SWITCHES);
+ else
+ /* Select MG1 for AUXP and MG2 for AUXM */
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_SWITCH_SELECT0,
+ WCD_USBSS_SWITCH_SELECT0_DP_AUXP_SWITCHES |
+ WCD_USBSS_SWITCH_SELECT0_DP_AUXM_SWITCHES,
+ WCD_USBSS_SWITCH_SELECT0_DP_AUXM_SWITCHES);
+ if (ret)
+ return ret;
+
+ /* Enable DP_AUXP_TO_MGX and DP_AUXM_TO_MGX switches */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_SWITCH_SETTINGS_ENABLE,
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DP_AUXP_TO_MGX_SWITCHES |
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DP_AUXM_TO_MGX_SWITCHES);
+
+ /* 15us to allow the SBU switch to turn on again */
+ usleep_range(15, 1000);
+ }
+
+ return 0;
+}
+
+static int wcd939x_usbss_switch_set(struct typec_switch_dev *sw,
+ enum typec_orientation orientation)
+{
+ struct wcd939x_usbss *usbss = typec_switch_get_drvdata(sw);
+ int ret = 0;
+
+ mutex_lock(&usbss->lock);
+
+ if (usbss->orientation != orientation) {
+ usbss->orientation = orientation;
+
+ ret = wcd939x_usbss_set(usbss);
+ }
+
+ mutex_unlock(&usbss->lock);
+
+ if (ret)
+ return ret;
+
+ /* Report orientation to codec after switch has been done */
+ return typec_switch_set(usbss->codec_switch, orientation);
+}
+
+static int wcd939x_usbss_mux_set(struct typec_mux_dev *mux,
+ struct typec_mux_state *state)
+{
+ struct wcd939x_usbss *usbss = typec_mux_get_drvdata(mux);
+ int ret = 0;
+
+ mutex_lock(&usbss->lock);
+
+ if (usbss->mode != state->mode) {
+ usbss->mode = state->mode;
+
+ if (state->alt)
+ usbss->svid = state->alt->svid;
+ else
+ usbss->svid = 0; // No SVID
+
+ ret = wcd939x_usbss_set(usbss);
+ }
+
+ mutex_unlock(&usbss->lock);
+
+ if (ret)
+ return ret;
+
+ /* Report event to codec after switch has been done */
+ return typec_mux_set(usbss->codec, state);
+}
+
+static int wcd939x_usbss_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct typec_switch_desc sw_desc = { };
+ struct typec_mux_desc mux_desc = { };
+ struct wcd939x_usbss *usbss;
+ int ret;
+
+ usbss = devm_kzalloc(dev, sizeof(*usbss), GFP_KERNEL);
+ if (!usbss)
+ return -ENOMEM;
+
+ usbss->client = client;
+ mutex_init(&usbss->lock);
+
+ usbss->regmap = devm_regmap_init_i2c(client, &wcd939x_usbss_regmap_config);
+ if (IS_ERR(usbss->regmap))
+ return dev_err_probe(dev, PTR_ERR(usbss->regmap), "failed to initialize regmap\n");
+
+ usbss->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(usbss->reset_gpio))
+ return dev_err_probe(dev, PTR_ERR(usbss->reset_gpio),
+ "unable to acquire reset gpio\n");
+
+ usbss->vdd_supply = devm_regulator_get_optional(dev, "vdd");
+ if (IS_ERR(usbss->vdd_supply))
+ return PTR_ERR(usbss->vdd_supply);
+
+ /* Get Codec's MUX & Switch devices */
+ usbss->codec = fwnode_typec_mux_get(dev->fwnode);
+ if (IS_ERR(usbss->codec))
+ return dev_err_probe(dev, PTR_ERR(usbss->codec),
+ "failed to acquire codec mode-switch\n");
+
+ usbss->codec_switch = fwnode_typec_switch_get(dev->fwnode);
+ if (IS_ERR(usbss->codec_switch)) {
+ ret = dev_err_probe(dev, PTR_ERR(usbss->codec_switch),
+ "failed to acquire codec orientation-switch\n");
+ goto err_mux_put;
+ }
+
+ usbss->mode = TYPEC_STATE_SAFE;
+ usbss->orientation = TYPEC_ORIENTATION_NONE;
+
+ gpiod_set_value(usbss->reset_gpio, 1);
+
+ ret = regulator_enable(usbss->vdd_supply);
+ if (ret) {
+ dev_err(dev, "Failed to enable vdd: %d\n", ret);
+ goto err_mux_switch;
+ }
+
+ msleep(20);
+
+ gpiod_set_value(usbss->reset_gpio, 0);
+
+ msleep(20);
+
+ /* Disable standby */
+ ret = regmap_clear_bits(usbss->regmap, WCD_USBSS_USB_SS_CNTL,
+ WCD_USBSS_USB_SS_CNTL_STANDBY_STATE);
+ if (ret)
+ goto err_regulator_disable;
+
+ /* Set manual mode by default */
+ ret = regmap_update_bits(usbss->regmap, WCD_USBSS_FUNCTION_ENABLE,
+ WCD_USBSS_FUNCTION_ENABLE_SOURCE_SELECT,
+ FIELD_PREP(WCD_USBSS_FUNCTION_ENABLE_SOURCE_SELECT,
+ WCD_USBSS_FUNCTION_ENABLE_SOURCE_SELECT_MANUAL));
+ if (ret)
+ goto err_regulator_disable;
+
+ /* Enable dynamic boosting for DP and DN */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_DP_DN_MISC1,
+ WCD_USBSS_DP_DN_MISC1_DP_PCOMP_2X_DYN_BST_ON_EN |
+ WCD_USBSS_DP_DN_MISC1_DN_PCOMP_2X_DYN_BST_ON_EN);
+ if (ret)
+ goto err_regulator_disable;
+
+ /* Enable dynamic boosting for MG1 OVP */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_MG1_MISC,
+ WCD_USBSS_MG1_MISC_PCOMP_2X_DYN_BST_ON_EN);
+ if (ret)
+ goto err_regulator_disable;
+
+ /* Enable dynamic boosting for MG2 OVP */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_MG2_MISC,
+ WCD_USBSS_MG2_MISC_PCOMP_2X_DYN_BST_ON_EN);
+ if (ret)
+ goto err_regulator_disable;
+
+ /* Write 0xFF to WCD_USBSS_CPLDO_CTL2 */
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_CPLDO_CTL2, 0xff);
+ if (ret)
+ goto err_regulator_disable;
+
+ /* Set RCO_EN: WCD_USBSS_USB_SS_CNTL Bit<3> --> 0x0 --> 0x1 */
+ ret = regmap_clear_bits(usbss->regmap, WCD_USBSS_USB_SS_CNTL,
+ WCD_USBSS_USB_SS_CNTL_RCO_EN);
+ if (ret)
+ goto err_regulator_disable;
+
+ ret = regmap_set_bits(usbss->regmap, WCD_USBSS_USB_SS_CNTL,
+ WCD_USBSS_USB_SS_CNTL_RCO_EN);
+ if (ret)
+ goto err_regulator_disable;
+
+ /* Disable all switches but enable the mux */
+ ret = regmap_write(usbss->regmap, WCD_USBSS_SWITCH_SETTINGS_ENABLE,
+ WCD_USBSS_SWITCH_SETTINGS_ENABLE_DEVICE_ENABLE);
+ if (ret)
+ goto err_regulator_disable;
+
+ /* Setup in SAFE mode */
+ ret = wcd939x_usbss_set(usbss);
+ if (ret)
+ goto err_regulator_disable;
+
+ sw_desc.drvdata = usbss;
+ sw_desc.fwnode = dev_fwnode(dev);
+ sw_desc.set = wcd939x_usbss_switch_set;
+
+ usbss->sw = typec_switch_register(dev, &sw_desc);
+ if (IS_ERR(usbss->sw)) {
+ ret = dev_err_probe(dev, PTR_ERR(usbss->sw), "failed to register typec switch\n");
+ goto err_regulator_disable;
+ }
+
+ mux_desc.drvdata = usbss;
+ mux_desc.fwnode = dev_fwnode(dev);
+ mux_desc.set = wcd939x_usbss_mux_set;
+
+ usbss->mux = typec_mux_register(dev, &mux_desc);
+ if (IS_ERR(usbss->mux)) {
+ typec_switch_unregister(usbss->sw);
+ ret = dev_err_probe(dev, PTR_ERR(usbss->mux), "failed to register typec mux\n");
+ goto err_switch_unregister;
+ }
+
+ i2c_set_clientdata(client, usbss);
+
+ return 0;
+
+err_switch_unregister:
+ typec_switch_unregister(usbss->sw);
+
+err_regulator_disable:
+ regulator_disable(usbss->vdd_supply);
+
+err_mux_switch:
+ typec_switch_put(usbss->codec_switch);
+
+err_mux_put:
+ typec_mux_put(usbss->codec);
+
+ return ret;
+}
+
+static void wcd939x_usbss_remove(struct i2c_client *client)
+{
+ struct wcd939x_usbss *usbss = i2c_get_clientdata(client);
+
+ typec_mux_unregister(usbss->mux);
+ typec_switch_unregister(usbss->sw);
+
+ regulator_disable(usbss->vdd_supply);
+
+ typec_mux_put(usbss->codec);
+}
+
+static const struct i2c_device_id wcd939x_usbss_table[] = {
+ { "wcd9390-usbss" },
+ { "wcd9395-usbss" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, wcd939x_usbss_table);
+
+static const struct of_device_id wcd939x_usbss_of_table[] = {
+ { .compatible = "qcom,wcd9390-usbss" },
+ { .compatible = "qcom,wcd9395-usbss" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wcd939x_usbss_of_table);
+
+static struct i2c_driver wcd939x_usbss_driver = {
+ .driver = {
+ .name = "wcd939x-usbss",
+ .of_match_table = wcd939x_usbss_of_table,
+ },
+ .probe = wcd939x_usbss_probe,
+ .remove = wcd939x_usbss_remove,
+ .id_table = wcd939x_usbss_table,
+};
+module_i2c_driver(wcd939x_usbss_driver);
+
+MODULE_DESCRIPTION("Qualcomm WCD939x USBSS driver");
+MODULE_LICENSE("GPL");
Qualcomm WCD9390/WCD9395 is a standalone Hi-Fi audio codec IC with a functionally separate USB SubSystem for Altmode/Analog Audio Switch accessible over an I2C interface. It provides switching USB-C USB2.0 lines between USB and Audio Headphones speaker lines, and the USB-C SBU lines between DisplayPort AUX and Audio Headphones Microphone/Ground. The Audio Headphone and Microphone data path between the Codec and the USB-C Mux subsystems are external to the IC, thus requiring DT port-endpoint graph description to handle USB-C altmode & orientation switching for Audio Accessory Mode. Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> --- drivers/usb/typec/mux/Kconfig | 10 + drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/wcd939x-usbss.c | 779 ++++++++++++++++++++++++++++++++++ 3 files changed, 790 insertions(+)