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path: root/drivers/extcon/extcon-sm5502.c
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-rw-r--r--drivers/extcon/extcon-sm5502.c855
1 files changed, 855 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
new file mode 100644
index 0000000000..c8c4b9ef72
--- /dev/null
+++ b/drivers/extcon/extcon-sm5502.c
@@ -0,0 +1,855 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/extcon-provider.h>
+
+#include "extcon-sm5502.h"
+
+#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
+
+struct muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+struct reg_data {
+ u8 reg;
+ unsigned int val;
+ bool invert;
+};
+
+struct sm5502_muic_info {
+ struct device *dev;
+ struct extcon_dev *edev;
+
+ struct i2c_client *i2c;
+ struct regmap *regmap;
+
+ const struct sm5502_type *type;
+ struct regmap_irq_chip_data *irq_data;
+ int irq;
+ bool irq_attach;
+ bool irq_detach;
+ struct work_struct irq_work;
+
+ struct mutex mutex;
+
+ /*
+ * Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ struct delayed_work wq_detcable;
+};
+
+struct sm5502_type {
+ struct muic_irq *muic_irqs;
+ unsigned int num_muic_irqs;
+ const struct regmap_irq_chip *irq_chip;
+
+ struct reg_data *reg_data;
+ unsigned int num_reg_data;
+
+ unsigned int otg_dev_type1;
+ int (*parse_irq)(struct sm5502_muic_info *info, int irq_type);
+};
+
+/* Default value of SM5502 register to bring up MUIC device. */
+static struct reg_data sm5502_reg_data[] = {
+ {
+ .reg = SM5502_REG_RESET,
+ .val = SM5502_REG_RESET_MASK,
+ .invert = true,
+ }, {
+ .reg = SM5502_REG_CONTROL,
+ .val = SM5502_REG_CONTROL_MASK_INT_MASK,
+ .invert = false,
+ }, {
+ .reg = SM5502_REG_INTMASK1,
+ .val = SM5502_REG_INTM1_KP_MASK
+ | SM5502_REG_INTM1_LKP_MASK
+ | SM5502_REG_INTM1_LKR_MASK,
+ .invert = true,
+ }, {
+ .reg = SM5502_REG_INTMASK2,
+ .val = SM5502_REG_INTM2_VBUS_DET_MASK
+ | SM5502_REG_INTM2_REV_ACCE_MASK
+ | SM5502_REG_INTM2_ADC_CHG_MASK
+ | SM5502_REG_INTM2_STUCK_KEY_MASK
+ | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
+ | SM5502_REG_INTM2_MHL_MASK,
+ .invert = true,
+ },
+};
+
+/* Default value of SM5504 register to bring up MUIC device. */
+static struct reg_data sm5504_reg_data[] = {
+ {
+ .reg = SM5502_REG_RESET,
+ .val = SM5502_REG_RESET_MASK,
+ .invert = true,
+ }, {
+ .reg = SM5502_REG_INTMASK1,
+ .val = SM5504_REG_INTM1_ATTACH_MASK
+ | SM5504_REG_INTM1_DETACH_MASK,
+ .invert = false,
+ }, {
+ .reg = SM5502_REG_INTMASK2,
+ .val = SM5504_REG_INTM2_RID_CHG_MASK
+ | SM5504_REG_INTM2_UVLO_MASK
+ | SM5504_REG_INTM2_POR_MASK,
+ .invert = true,
+ }, {
+ .reg = SM5502_REG_CONTROL,
+ .val = SM5502_REG_CONTROL_MANUAL_SW_MASK
+ | SM5504_REG_CONTROL_CHGTYP_MASK
+ | SM5504_REG_CONTROL_USBCHDEN_MASK
+ | SM5504_REG_CONTROL_ADC_EN_MASK,
+ .invert = true,
+ },
+};
+
+/* List of detectable cables */
+static const unsigned int sm5502_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_CHG_USB_SDP,
+ EXTCON_CHG_USB_DCP,
+ EXTCON_NONE,
+};
+
+/* Define supported accessory type */
+enum sm5502_muic_acc_type {
+ SM5502_MUIC_ADC_GROUND = 0x0,
+ SM5502_MUIC_ADC_SEND_END_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
+ SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
+ SM5502_MUIC_ADC_RESERVED_ACC_1,
+ SM5502_MUIC_ADC_RESERVED_ACC_2,
+ SM5502_MUIC_ADC_RESERVED_ACC_3,
+ SM5502_MUIC_ADC_RESERVED_ACC_4,
+ SM5502_MUIC_ADC_RESERVED_ACC_5,
+ SM5502_MUIC_ADC_AUDIO_TYPE2,
+ SM5502_MUIC_ADC_PHONE_POWERED_DEV,
+ SM5502_MUIC_ADC_TTY_CONVERTER,
+ SM5502_MUIC_ADC_UART_CABLE,
+ SM5502_MUIC_ADC_TYPE1_CHARGER,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
+ SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
+ SM5502_MUIC_ADC_TYPE2_CHARGER,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
+ SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
+ SM5502_MUIC_ADC_AUDIO_TYPE1,
+ SM5502_MUIC_ADC_OPEN = 0x1f,
+
+ /*
+ * The below accessories have same ADC value (0x1f or 0x1e).
+ * So, Device type1 is used to separate specific accessory.
+ */
+ /* |---------|--ADC| */
+ /* | [7:5]|[4:0]| */
+ SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
+ SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
+ /* |Dev Type1|--ADC| */
+ SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80, /* | 100|00000| */
+ SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
+ SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
+ SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
+};
+
+/* List of supported interrupt for SM5502 */
+static struct muic_irq sm5502_muic_irqs[] = {
+ { SM5502_IRQ_INT1_ATTACH, "muic-attach" },
+ { SM5502_IRQ_INT1_DETACH, "muic-detach" },
+ { SM5502_IRQ_INT1_KP, "muic-kp" },
+ { SM5502_IRQ_INT1_LKP, "muic-lkp" },
+ { SM5502_IRQ_INT1_LKR, "muic-lkr" },
+ { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
+ { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
+ { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
+ { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
+ { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
+ { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
+ { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
+ { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
+ { SM5502_IRQ_INT2_MHL, "muic-mhl" },
+};
+
+/* Define interrupt list of SM5502 to register regmap_irq */
+static const struct regmap_irq sm5502_irqs[] = {
+ /* INT1 interrupts */
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
+ { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
+
+ /* INT2 interrupts */
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
+ { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
+};
+
+static const struct regmap_irq_chip sm5502_muic_irq_chip = {
+ .name = "sm5502",
+ .status_base = SM5502_REG_INT1,
+ .mask_base = SM5502_REG_INTMASK1,
+ .num_regs = 2,
+ .irqs = sm5502_irqs,
+ .num_irqs = ARRAY_SIZE(sm5502_irqs),
+};
+
+/* List of supported interrupt for SM5504 */
+static struct muic_irq sm5504_muic_irqs[] = {
+ { SM5504_IRQ_INT1_ATTACH, "muic-attach" },
+ { SM5504_IRQ_INT1_DETACH, "muic-detach" },
+ { SM5504_IRQ_INT1_CHG_DET, "muic-chg-det" },
+ { SM5504_IRQ_INT1_DCD_OUT, "muic-dcd-out" },
+ { SM5504_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
+ { SM5504_IRQ_INT1_CONNECT, "muic-connect" },
+ { SM5504_IRQ_INT1_ADC_CHG, "muic-adc-chg" },
+ { SM5504_IRQ_INT2_RID_CHG, "muic-rid-chg" },
+ { SM5504_IRQ_INT2_UVLO, "muic-uvlo" },
+ { SM5504_IRQ_INT2_POR, "muic-por" },
+ { SM5504_IRQ_INT2_OVP_FET, "muic-ovp-fet" },
+ { SM5504_IRQ_INT2_OCP_LATCH, "muic-ocp-latch" },
+ { SM5504_IRQ_INT2_OCP_EVENT, "muic-ocp-event" },
+ { SM5504_IRQ_INT2_OVP_OCP_EVENT, "muic-ovp-ocp-event" },
+};
+
+/* Define interrupt list of SM5504 to register regmap_irq */
+static const struct regmap_irq sm5504_irqs[] = {
+ /* INT1 interrupts */
+ { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ATTACH_MASK, },
+ { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DETACH_MASK, },
+ { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CHG_DET_MASK, },
+ { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DCD_OUT_MASK, },
+ { .reg_offset = 0, .mask = SM5504_IRQ_INT1_OVP_MASK, },
+ { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CONNECT_MASK, },
+ { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ADC_CHG_MASK, },
+
+ /* INT2 interrupts */
+ { .reg_offset = 1, .mask = SM5504_IRQ_INT2_RID_CHG_MASK,},
+ { .reg_offset = 1, .mask = SM5504_IRQ_INT2_UVLO_MASK, },
+ { .reg_offset = 1, .mask = SM5504_IRQ_INT2_POR_MASK, },
+ { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_FET_MASK, },
+ { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_LATCH_MASK, },
+ { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_EVENT_MASK, },
+ { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_OCP_EVENT_MASK, },
+};
+
+static const struct regmap_irq_chip sm5504_muic_irq_chip = {
+ .name = "sm5504",
+ .status_base = SM5502_REG_INT1,
+ .mask_base = SM5502_REG_INTMASK1,
+ .num_regs = 2,
+ .irqs = sm5504_irqs,
+ .num_irqs = ARRAY_SIZE(sm5504_irqs),
+};
+
+/* Define regmap configuration of SM5502 for I2C communication */
+static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SM5502_REG_INTMASK1:
+ case SM5502_REG_INTMASK2:
+ return true;
+ default:
+ break;
+ }
+ return false;
+}
+
+static const struct regmap_config sm5502_muic_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_reg = sm5502_muic_volatile_reg,
+ .max_register = SM5502_REG_END,
+};
+
+/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
+static int sm5502_muic_set_path(struct sm5502_muic_info *info,
+ unsigned int con_sw, unsigned int vbus_sw,
+ bool attached)
+{
+ int ret;
+
+ if (!attached) {
+ con_sw = DM_DP_SWITCH_OPEN;
+ vbus_sw = VBUSIN_SWITCH_OPEN;
+ }
+
+ switch (con_sw) {
+ case DM_DP_SWITCH_OPEN:
+ case DM_DP_SWITCH_USB:
+ case DM_DP_SWITCH_AUDIO:
+ case DM_DP_SWITCH_UART:
+ ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
+ SM5502_REG_MANUAL_SW1_DP_MASK |
+ SM5502_REG_MANUAL_SW1_DM_MASK,
+ con_sw);
+ if (ret < 0) {
+ dev_err(info->dev,
+ "cannot update DM_CON/DP_CON switch\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
+ con_sw);
+ return -EINVAL;
+ }
+
+ switch (vbus_sw) {
+ case VBUSIN_SWITCH_OPEN:
+ case VBUSIN_SWITCH_VBUSOUT:
+ case VBUSIN_SWITCH_MIC:
+ case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
+ ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
+ SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
+ vbus_sw);
+ if (ret < 0) {
+ dev_err(info->dev,
+ "cannot update VBUSIN switch\n");
+ return ret;
+ }
+ break;
+ default:
+ dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* Return cable type of attached or detached accessories */
+static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
+{
+ unsigned int cable_type, adc, dev_type1;
+ int ret;
+
+ /* Read ADC value according to external cable or button */
+ ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
+ if (ret) {
+ dev_err(info->dev, "failed to read ADC register\n");
+ return ret;
+ }
+
+ /*
+ * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
+ * connected with to MUIC device.
+ */
+ cable_type = adc & SM5502_REG_ADC_MASK;
+
+ switch (cable_type) {
+ case SM5502_MUIC_ADC_GROUND:
+ ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
+ &dev_type1);
+ if (ret) {
+ dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
+ return ret;
+ }
+
+ if (dev_type1 == info->type->otg_dev_type1) {
+ cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG;
+ } else {
+ dev_dbg(info->dev,
+ "cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n",
+ adc, dev_type1);
+ return -EINVAL;
+ }
+ break;
+ case SM5502_MUIC_ADC_SEND_END_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
+ case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
+ case SM5502_MUIC_ADC_RESERVED_ACC_1:
+ case SM5502_MUIC_ADC_RESERVED_ACC_2:
+ case SM5502_MUIC_ADC_RESERVED_ACC_3:
+ case SM5502_MUIC_ADC_RESERVED_ACC_4:
+ case SM5502_MUIC_ADC_RESERVED_ACC_5:
+ case SM5502_MUIC_ADC_AUDIO_TYPE2:
+ case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
+ case SM5502_MUIC_ADC_TTY_CONVERTER:
+ case SM5502_MUIC_ADC_UART_CABLE:
+ case SM5502_MUIC_ADC_TYPE1_CHARGER:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
+ case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
+ case SM5502_MUIC_ADC_TYPE2_CHARGER:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
+ case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
+ break;
+ case SM5502_MUIC_ADC_AUDIO_TYPE1:
+ /*
+ * Check whether cable type is
+ * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
+ * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
+ * by using Button event.
+ */
+ break;
+ case SM5502_MUIC_ADC_OPEN:
+ ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
+ &dev_type1);
+ if (ret) {
+ dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
+ return ret;
+ }
+
+ if (dev_type1 == info->type->otg_dev_type1) {
+ cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
+ break;
+ }
+
+ switch (dev_type1) {
+ case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
+ cable_type = SM5502_MUIC_ADC_OPEN_USB;
+ break;
+ case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
+ cable_type = SM5502_MUIC_ADC_OPEN_TA;
+ break;
+ default:
+ dev_dbg(info->dev,
+ "cannot identify the cable type: adc(0x%x)\n",
+ adc);
+ return -EINVAL;
+ }
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to identify the cable type: adc(0x%x)\n", adc);
+ return -EINVAL;
+ }
+
+ return cable_type;
+}
+
+static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
+ bool attached)
+{
+ static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
+ unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
+ unsigned int con_sw = DM_DP_SWITCH_OPEN;
+ unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
+ unsigned int id;
+ int ret;
+
+ /* Get the type of attached or detached cable */
+ if (attached)
+ cable_type = sm5502_muic_get_cable_type(info);
+ else
+ cable_type = prev_cable_type;
+ prev_cable_type = cable_type;
+
+ switch (cable_type) {
+ case SM5502_MUIC_ADC_OPEN_USB:
+ id = EXTCON_USB;
+ con_sw = DM_DP_SWITCH_USB;
+ vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
+ break;
+ case SM5502_MUIC_ADC_OPEN_TA:
+ id = EXTCON_CHG_USB_DCP;
+ con_sw = DM_DP_SWITCH_OPEN;
+ vbus_sw = VBUSIN_SWITCH_VBUSOUT;
+ break;
+ case SM5502_MUIC_ADC_GROUND_USB_OTG:
+ case SM5502_MUIC_ADC_OPEN_USB_OTG:
+ id = EXTCON_USB_HOST;
+ con_sw = DM_DP_SWITCH_USB;
+ vbus_sw = VBUSIN_SWITCH_OPEN;
+ break;
+ default:
+ dev_dbg(info->dev,
+ "cannot handle this cable_type (0x%x)\n", cable_type);
+ return 0;
+ }
+
+ /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
+ ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
+ if (ret < 0)
+ return ret;
+
+ /* Change the state of external accessory */
+ extcon_set_state_sync(info->edev, id, attached);
+ if (id == EXTCON_USB)
+ extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+ attached);
+
+ return 0;
+}
+
+static void sm5502_muic_irq_work(struct work_struct *work)
+{
+ struct sm5502_muic_info *info = container_of(work,
+ struct sm5502_muic_info, irq_work);
+ int ret = 0;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ /* Detect attached or detached cables */
+ if (info->irq_attach) {
+ ret = sm5502_muic_cable_handler(info, true);
+ info->irq_attach = false;
+ }
+ if (info->irq_detach) {
+ ret = sm5502_muic_cable_handler(info, false);
+ info->irq_detach = false;
+ }
+
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+ mutex_unlock(&info->mutex);
+}
+
+/*
+ * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
+ * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
+ */
+static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
+{
+ switch (irq_type) {
+ case SM5502_IRQ_INT1_ATTACH:
+ info->irq_attach = true;
+ break;
+ case SM5502_IRQ_INT1_DETACH:
+ info->irq_detach = true;
+ break;
+ case SM5502_IRQ_INT1_KP:
+ case SM5502_IRQ_INT1_LKP:
+ case SM5502_IRQ_INT1_LKR:
+ case SM5502_IRQ_INT1_OVP_EVENT:
+ case SM5502_IRQ_INT1_OCP_EVENT:
+ case SM5502_IRQ_INT1_OVP_OCP_DIS:
+ case SM5502_IRQ_INT2_VBUS_DET:
+ case SM5502_IRQ_INT2_REV_ACCE:
+ case SM5502_IRQ_INT2_ADC_CHG:
+ case SM5502_IRQ_INT2_STUCK_KEY:
+ case SM5502_IRQ_INT2_STUCK_KEY_RCV:
+ case SM5502_IRQ_INT2_MHL:
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int sm5504_parse_irq(struct sm5502_muic_info *info, int irq_type)
+{
+ switch (irq_type) {
+ case SM5504_IRQ_INT1_ATTACH:
+ info->irq_attach = true;
+ break;
+ case SM5504_IRQ_INT1_DETACH:
+ info->irq_detach = true;
+ break;
+ case SM5504_IRQ_INT1_CHG_DET:
+ case SM5504_IRQ_INT1_DCD_OUT:
+ case SM5504_IRQ_INT1_OVP_EVENT:
+ case SM5504_IRQ_INT1_CONNECT:
+ case SM5504_IRQ_INT1_ADC_CHG:
+ case SM5504_IRQ_INT2_RID_CHG:
+ case SM5504_IRQ_INT2_UVLO:
+ case SM5504_IRQ_INT2_POR:
+ case SM5504_IRQ_INT2_OVP_FET:
+ case SM5504_IRQ_INT2_OCP_LATCH:
+ case SM5504_IRQ_INT2_OCP_EVENT:
+ case SM5504_IRQ_INT2_OVP_OCP_EVENT:
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
+{
+ struct sm5502_muic_info *info = data;
+ int i, irq_type = -1, ret;
+
+ for (i = 0; i < info->type->num_muic_irqs; i++)
+ if (irq == info->type->muic_irqs[i].virq)
+ irq_type = info->type->muic_irqs[i].irq;
+
+ ret = info->type->parse_irq(info, irq_type);
+ if (ret < 0) {
+ dev_warn(info->dev, "cannot handle is interrupt:%d\n",
+ irq_type);
+ return IRQ_HANDLED;
+ }
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static void sm5502_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct sm5502_muic_info *info = container_of(to_delayed_work(work),
+ struct sm5502_muic_info, wq_detcable);
+ int ret;
+
+ /* Notify the state of connector cable or not */
+ ret = sm5502_muic_cable_handler(info, true);
+ if (ret < 0)
+ dev_warn(info->dev, "failed to detect cable state\n");
+}
+
+static void sm5502_init_dev_type(struct sm5502_muic_info *info)
+{
+ unsigned int reg_data, vendor_id, version_id;
+ int i, ret;
+
+ /* To test I2C, Print version_id and vendor_id of SM5502 */
+ ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read DEVICE_ID register: %d\n", ret);
+ return;
+ }
+
+ vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
+ SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
+ version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
+ SM5502_REG_DEVICE_ID_VERSION_SHIFT);
+
+ dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
+ version_id, vendor_id);
+
+ /* Initiazle the register of SM5502 device to bring-up */
+ for (i = 0; i < info->type->num_reg_data; i++) {
+ unsigned int val = 0;
+
+ if (!info->type->reg_data[i].invert)
+ val |= ~info->type->reg_data[i].val;
+ else
+ val = info->type->reg_data[i].val;
+ regmap_write(info->regmap, info->type->reg_data[i].reg, val);
+ }
+}
+
+static int sm5022_muic_i2c_probe(struct i2c_client *i2c)
+{
+ struct device_node *np = i2c->dev.of_node;
+ struct sm5502_muic_info *info;
+ int i, ret, irq_flags;
+
+ if (!np)
+ return -EINVAL;
+
+ info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+ i2c_set_clientdata(i2c, info);
+
+ info->dev = &i2c->dev;
+ info->i2c = i2c;
+ info->irq = i2c->irq;
+ info->type = device_get_match_data(info->dev);
+ if (!info->type)
+ return -EINVAL;
+ if (!info->type->parse_irq) {
+ dev_err(info->dev, "parse_irq missing in struct sm5502_type\n");
+ return -EINVAL;
+ }
+
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
+
+ info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
+ if (IS_ERR(info->regmap)) {
+ ret = PTR_ERR(info->regmap);
+ dev_err(info->dev, "failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* Support irq domain for SM5502 MUIC device */
+ irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
+ ret = devm_regmap_add_irq_chip(info->dev, info->regmap, info->irq,
+ irq_flags, 0, info->type->irq_chip,
+ &info->irq_data);
+ if (ret != 0) {
+ dev_err(info->dev, "failed to request IRQ %d: %d\n",
+ info->irq, ret);
+ return ret;
+ }
+
+ for (i = 0; i < info->type->num_muic_irqs; i++) {
+ struct muic_irq *muic_irq = &info->type->muic_irqs[i];
+ int virq = 0;
+
+ virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
+ if (virq <= 0)
+ return -EINVAL;
+ muic_irq->virq = virq;
+
+ ret = devm_request_threaded_irq(info->dev, virq, NULL,
+ sm5502_muic_irq_handler,
+ IRQF_NO_SUSPEND | IRQF_ONESHOT,
+ muic_irq->name, info);
+ if (ret) {
+ dev_err(info->dev,
+ "failed: irq request (IRQ: %d, error :%d)\n",
+ muic_irq->irq, ret);
+ return ret;
+ }
+ }
+
+ /* Allocate extcon device */
+ info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(info->dev, "failed to allocate memory for extcon\n");
+ return -ENOMEM;
+ }
+
+ /* Register extcon device */
+ ret = devm_extcon_dev_register(info->dev, info->edev);
+ if (ret) {
+ dev_err(info->dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ /*
+ * Detect accessory after completing the initialization of platform
+ *
+ * - Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ msecs_to_jiffies(DELAY_MS_DEFAULT));
+
+ /* Initialize SM5502 device and print vendor id and version id */
+ sm5502_init_dev_type(info);
+
+ return 0;
+}
+
+static const struct sm5502_type sm5502_data = {
+ .muic_irqs = sm5502_muic_irqs,
+ .num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs),
+ .irq_chip = &sm5502_muic_irq_chip,
+ .reg_data = sm5502_reg_data,
+ .num_reg_data = ARRAY_SIZE(sm5502_reg_data),
+ .otg_dev_type1 = SM5502_REG_DEV_TYPE1_USB_OTG_MASK,
+ .parse_irq = sm5502_parse_irq,
+};
+
+static const struct sm5502_type sm5504_data = {
+ .muic_irqs = sm5504_muic_irqs,
+ .num_muic_irqs = ARRAY_SIZE(sm5504_muic_irqs),
+ .irq_chip = &sm5504_muic_irq_chip,
+ .reg_data = sm5504_reg_data,
+ .num_reg_data = ARRAY_SIZE(sm5504_reg_data),
+ .otg_dev_type1 = SM5504_REG_DEV_TYPE1_USB_OTG_MASK,
+ .parse_irq = sm5504_parse_irq,
+};
+
+static const struct of_device_id sm5502_dt_match[] = {
+ { .compatible = "siliconmitus,sm5502-muic", .data = &sm5502_data },
+ { .compatible = "siliconmitus,sm5504-muic", .data = &sm5504_data },
+ { .compatible = "siliconmitus,sm5703-muic", .data = &sm5502_data },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sm5502_dt_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int sm5502_muic_suspend(struct device *dev)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+ enable_irq_wake(info->irq);
+
+ return 0;
+}
+
+static int sm5502_muic_resume(struct device *dev)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+ disable_irq_wake(info->irq);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
+ sm5502_muic_suspend, sm5502_muic_resume);
+
+static const struct i2c_device_id sm5502_i2c_id[] = {
+ { "sm5502", (kernel_ulong_t)&sm5502_data },
+ { "sm5504", (kernel_ulong_t)&sm5504_data },
+ { "sm5703-muic", (kernel_ulong_t)&sm5502_data },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
+
+static struct i2c_driver sm5502_muic_i2c_driver = {
+ .driver = {
+ .name = "sm5502",
+ .pm = &sm5502_muic_pm_ops,
+ .of_match_table = sm5502_dt_match,
+ },
+ .probe = sm5022_muic_i2c_probe,
+ .id_table = sm5502_i2c_id,
+};
+
+static int __init sm5502_muic_i2c_init(void)
+{
+ return i2c_add_driver(&sm5502_muic_i2c_driver);
+}
+subsys_initcall(sm5502_muic_i2c_init);
+
+MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 23:08:26 +0000