extcon: sm5502: Add support new SM5502 extcon device driver
authorChanwoo Choi <cw00.choi@samsung.com>
Thu, 22 May 2014 05:06:33 +0000 (14:06 +0900)
committerChanwoo Choi <cw00.choi@samsung.com>
Wed, 23 Jul 2014 01:22:30 +0000 (10:22 +0900)
This patch add new SM5502 MUIC(Micro-USB Interface Controller) device by using
EXTCON subsystem. The extcon-sm5502 driver is capable of identifying the type
of the external power source and attached accessory. An external power sources,
such as Deticated Charger or a standard USB port, are able to charge the battery
in the smart phone via the connector.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
drivers/extcon/Kconfig
drivers/extcon/Makefile
drivers/extcon/extcon-sm5502.c [new file with mode: 0644]
include/linux/extcon/sm5502.h [new file with mode: 0644]

index 9125eba6b3d60687a84532507424152721fac621..6f2f4727de2cbab5572d5726a30ddc86b034f895 100644 (file)
@@ -70,4 +70,14 @@ config EXTCON_PALMAS
          Say Y here to enable support for USB peripheral and USB host
          detection by palmas usb.
 
+config EXTCON_SM5502
+       tristate "SM5502 EXTCON support"
+       select IRQ_DOMAIN
+       select REGMAP_I2C
+       select REGMAP_IRQ
+       help
+         If you say yes here you get support for the MUIC device of
+         Silicon Mitus SM5502. The SM5502 is a USB port accessory
+         detector and switch.
+
 endif # MULTISTATE_SWITCH
index e48abc6d230f6cac7f5ba9c024ea2fe760e51045..b38546eb522aca00f888ff2ab115367bc306df96 100644 (file)
@@ -10,3 +10,4 @@ obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o
 obj-$(CONFIG_EXTCON_MAX77693)  += extcon-max77693.o
 obj-$(CONFIG_EXTCON_MAX8997)   += extcon-max8997.o
 obj-$(CONFIG_EXTCON_PALMAS)    += extcon-palmas.o
+obj-$(CONFIG_EXTCON_SM5502)    += extcon-sm5502.o
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
new file mode 100644 (file)
index 0000000..9f318c2
--- /dev/null
@@ -0,0 +1,620 @@
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/input.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.h>
+#include <linux/extcon/sm5502.h>
+
+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;
+
+       struct regmap_irq_chip_data *irq_data;
+       struct muic_irq *muic_irqs;
+       unsigned int num_muic_irqs;
+       int irq;
+       bool irq_attach;
+       bool irq_detach;
+       struct work_struct irq_work;
+
+       struct reg_data *reg_data;
+       unsigned int num_reg_data;
+
+       struct mutex mutex;
+};
+
+/* Default value of SM5502 register to bring up MUIC device. */
+static struct reg_data sm5502_reg_data[] = {
+       {
+               .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,
+       },
+       { }
+};
+
+/* List of detectable cables */
+enum {
+       EXTCON_CABLE_USB = 0,
+       EXTCON_CABLE_USB_HOST,
+       EXTCON_CABLE_TA,
+
+       EXTCON_CABLE_END,
+};
+
+static const char *sm5502_extcon_cable[] = {
+       [EXTCON_CABLE_USB]      = "USB",
+       [EXTCON_CABLE_USB_HOST] = "USB-Host",
+       [EXTCON_CABLE_TA]       = "TA",
+       NULL,
+};
+
+/* 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_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,
+       .mask_invert            = false,
+       .num_regs               = 2,
+       .irqs                   = sm5502_irqs,
+       .num_irqs               = ARRAY_SIZE(sm5502_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,
+};
+
+/* 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 = -1, 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 &= SM5502_REG_ADC_MASK;
+       if (cable_type == SM5502_MUIC_ADC_GROUND)
+               return SM5502_MUIC_ADC_GROUND;
+
+       switch (cable_type) {
+       case SM5502_MUIC_ADC_GROUND:
+       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;
+               }
+
+               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;
+               case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
+                       cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
+                       break;
+               default:
+                       dev_dbg(info->dev,
+                               "cannot identify the cable type: adc(0x%x) "
+                               "dev_type1(0x%x)\n", adc, dev_type1);
+                       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;
+       const char **cable_names = info->edev->supported_cable;
+       unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
+       unsigned int idx = 0;
+
+       if (!cable_names)
+               return 0;
+
+       /* Get the type of attached or detached cable */
+       if (attached)
+               cable_type = sm5502_muic_get_cable_type(info);
+       else if (!attached)
+               cable_type = prev_cable_type;
+       prev_cable_type = cable_type;
+
+       switch (cable_type) {
+       case SM5502_MUIC_ADC_OPEN_USB:
+               idx = EXTCON_CABLE_USB;
+               break;
+       case SM5502_MUIC_ADC_OPEN_TA:
+               idx = EXTCON_CABLE_TA;
+               break;
+       case SM5502_MUIC_ADC_OPEN_USB_OTG:
+               idx = EXTCON_CABLE_USB_HOST;
+               break;
+       default:
+               dev_dbg(info->dev,
+                       "cannot handle this cable_type (0x%x)\n", cable_type);
+               return 0;
+       };
+
+       extcon_set_cable_state(info->edev, cable_names[idx], 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);
+
+       return;
+}
+
+/*
+ * 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 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->num_muic_irqs; i++)
+               if (irq == info->muic_irqs[i].virq)
+                       irq_type = info->muic_irqs[i].irq;
+
+       ret = sm5502_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_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->num_reg_data; i++) {
+               unsigned int val = 0;
+
+               if (!info->reg_data[i].invert)
+                       val |= ~info->reg_data[i].val;
+               else
+                       val = info->reg_data[i].val;
+               regmap_write(info->regmap, info->reg_data[i].reg, val);
+       }
+}
+
+static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
+                                const struct i2c_device_id *id)
+{
+       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->muic_irqs = sm5502_muic_irqs;
+       info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
+       info->reg_data = sm5502_reg_data;
+       info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
+
+       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 = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
+                                 &sm5502_muic_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->num_muic_irqs; i++) {
+               struct muic_irq *muic_irq = &info->muic_irqs[i];
+               unsigned 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,
+                                               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;
+       }
+       info->edev->name = np->name;
+
+       /* 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;
+       }
+
+       /* Initialize SM5502 device and print vendor id and version id */
+       sm5502_init_dev_type(info);
+
+       return 0;
+}
+
+static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
+{
+       struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
+
+       regmap_del_irq_chip(info->irq, info->irq_data);
+
+       return 0;
+}
+
+static struct of_device_id sm5502_dt_match[] = {
+       { .compatible = "siliconmitus,sm5502-muic" },
+       { },
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int sm5502_muic_suspend(struct device *dev)
+{
+       struct i2c_client *i2c = container_of(dev, struct 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 = container_of(dev, struct 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", TYPE_SM5502 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
+
+static struct i2c_driver sm5502_muic_i2c_driver = {
+       .driver         = {
+               .name   = "sm5502",
+               .owner  = THIS_MODULE,
+               .pm     = &sm5502_muic_pm_ops,
+               .of_match_table = sm5502_dt_match,
+       },
+       .probe  = sm5022_muic_i2c_probe,
+       .remove = sm5502_muic_i2c_remove,
+       .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");
diff --git a/include/linux/extcon/sm5502.h b/include/linux/extcon/sm5502.h
new file mode 100644 (file)
index 0000000..17bd655
--- /dev/null
@@ -0,0 +1,264 @@
+/*
+ * sm5502.h
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_EXTCON_SM5502_H
+#define __LINUX_EXTCON_SM5502_H
+
+enum sm5502_types {
+       TYPE_SM5502,
+};
+
+/* SM5502 registers */
+enum sm5502_reg {
+       SM5502_REG_DEVICE_ID = 0x01,
+       SM5502_REG_CONTROL,
+       SM5502_REG_INT1,
+       SM5502_REG_INT2,
+       SM5502_REG_INTMASK1,
+       SM5502_REG_INTMASK2,
+       SM5502_REG_ADC,
+       SM5502_REG_TIMING_SET1,
+       SM5502_REG_TIMING_SET2,
+       SM5502_REG_DEV_TYPE1,
+       SM5502_REG_DEV_TYPE2,
+       SM5502_REG_BUTTON1,
+       SM5502_REG_BUTTON2,
+       SM5502_REG_CAR_KIT_STATUS,
+       SM5502_REG_RSVD1,
+       SM5502_REG_RSVD2,
+       SM5502_REG_RSVD3,
+       SM5502_REG_RSVD4,
+       SM5502_REG_MANUAL_SW1,
+       SM5502_REG_MANUAL_SW2,
+       SM5502_REG_DEV_TYPE3,
+       SM5502_REG_RSVD5,
+       SM5502_REG_RSVD6,
+       SM5502_REG_RSVD7,
+       SM5502_REG_RSVD8,
+       SM5502_REG_RSVD9,
+       SM5502_REG_RESET,
+       SM5502_REG_RSVD10,
+       SM5502_REG_RESERVED_ID1,
+       SM5502_REG_RSVD11,
+       SM5502_REG_RSVD12,
+       SM5502_REG_RESERVED_ID2,
+       SM5502_REG_RSVD13,
+       SM5502_REG_OCP,
+       SM5502_REG_RSVD14,
+       SM5502_REG_RSVD15,
+       SM5502_REG_RSVD16,
+       SM5502_REG_RSVD17,
+       SM5502_REG_RSVD18,
+       SM5502_REG_RSVD19,
+       SM5502_REG_RSVD20,
+       SM5502_REG_RSVD21,
+       SM5502_REG_RSVD22,
+       SM5502_REG_RSVD23,
+       SM5502_REG_RSVD24,
+       SM5502_REG_RSVD25,
+       SM5502_REG_RSVD26,
+       SM5502_REG_RSVD27,
+       SM5502_REG_RSVD28,
+       SM5502_REG_RSVD29,
+       SM5502_REG_RSVD30,
+       SM5502_REG_RSVD31,
+       SM5502_REG_RSVD32,
+       SM5502_REG_RSVD33,
+       SM5502_REG_RSVD34,
+       SM5502_REG_RSVD35,
+       SM5502_REG_RSVD36,
+       SM5502_REG_RESERVED_ID3,
+
+       SM5502_REG_END,
+};
+
+/* Define SM5502 MASK/SHIFT constant */
+#define SM5502_REG_DEVICE_ID_VENDOR_SHIFT      0
+#define SM5502_REG_DEVICE_ID_VERSION_SHIFT     3
+#define SM5502_REG_DEVICE_ID_VENDOR_MASK       (0x3 << SM5502_REG_DEVICE_ID_VENDOR_SHIFT)
+#define SM5502_REG_DEVICE_ID_VERSION_MASK      (0x1f << SM5502_REG_DEVICE_ID_VERSION_SHIFT)
+
+#define SM5502_REG_CONTROL_MASK_INT_SHIFT      0
+#define SM5502_REG_CONTROL_WAIT_SHIFT          1
+#define SM5502_REG_CONTROL_MANUAL_SW_SHIFT     2
+#define SM5502_REG_CONTROL_RAW_DATA_SHIFT      3
+#define SM5502_REG_CONTROL_SW_OPEN_SHIFT       4
+#define SM5502_REG_CONTROL_MASK_INT_MASK       (0x1 << SM5502_REG_CONTROL_MASK_INT_SHIFT)
+#define SM5502_REG_CONTROL_WAIT_MASK           (0x1 << SM5502_REG_CONTROL_WAIT_SHIFT)
+#define SM5502_REG_CONTROL_MANUAL_SW_MASK      (0x1 << SM5502_REG_CONTROL_MANUAL_SW_SHIFT)
+#define SM5502_REG_CONTROL_RAW_DATA_MASK       (0x1 << SM5502_REG_CONTROL_RAW_DATA_SHIFT)
+#define SM5502_REG_CONTROL_SW_OPEN_MASK                (0x1 << SM5502_REG_CONTROL_SW_OPEN_SHIFT)
+
+#define SM5502_REG_INTM1_ATTACH_SHIFT          0
+#define SM5502_REG_INTM1_DETACH_SHIFT          1
+#define SM5502_REG_INTM1_KP_SHIFT              2
+#define SM5502_REG_INTM1_LKP_SHIFT             3
+#define SM5502_REG_INTM1_LKR_SHIFT             4
+#define SM5502_REG_INTM1_OVP_EVENT_SHIFT       5
+#define SM5502_REG_INTM1_OCP_EVENT_SHIFT       6
+#define SM5502_REG_INTM1_OVP_OCP_DIS_SHIFT     7
+#define SM5502_REG_INTM1_ATTACH_MASK           (0x1 << SM5502_REG_INTM1_ATTACH_SHIFT)
+#define SM5502_REG_INTM1_DETACH_MASK           (0x1 << SM5502_REG_INTM1_DETACH_SHIFT)
+#define SM5502_REG_INTM1_KP_MASK               (0x1 << SM5502_REG_INTM1_KP_SHIFT)
+#define SM5502_REG_INTM1_LKP_MASK              (0x1 << SM5502_REG_INTM1_LKP_SHIFT)
+#define SM5502_REG_INTM1_LKR_MASK              (0x1 << SM5502_REG_INTM1_LKR_SHIFT)
+#define SM5502_REG_INTM1_OVP_EVENT_MASK                (0x1 << SM5502_REG_INTM1_OVP_EVENT_SHIFT)
+#define SM5502_REG_INTM1_OCP_EVENT_MASK                (0x1 << SM5502_REG_INTM1_OCP_EVENT_SHIFT)
+#define SM5502_REG_INTM1_OVP_OCP_DIS_MASK      (0x1 << SM5502_REG_INTM1_OVP_OCP_DIS_SHIFT)
+
+#define SM5502_REG_INTM2_VBUS_DET_SHIFT                0
+#define SM5502_REG_INTM2_REV_ACCE_SHIFT                1
+#define SM5502_REG_INTM2_ADC_CHG_SHIFT         2
+#define SM5502_REG_INTM2_STUCK_KEY_SHIFT       3
+#define SM5502_REG_INTM2_STUCK_KEY_RCV_SHIFT   4
+#define SM5502_REG_INTM2_MHL_SHIFT             5
+#define SM5502_REG_INTM2_VBUS_DET_MASK         (0x1 << SM5502_REG_INTM2_VBUS_DET_SHIFT)
+#define SM5502_REG_INTM2_REV_ACCE_MASK         (0x1 << SM5502_REG_INTM2_REV_ACCE_SHIFT)
+#define SM5502_REG_INTM2_ADC_CHG_MASK          (0x1 << SM5502_REG_INTM2_ADC_CHG_SHIFT)
+#define SM5502_REG_INTM2_STUCK_KEY_MASK                (0x1 << SM5502_REG_INTM2_STUCK_KEY_SHIFT)
+#define SM5502_REG_INTM2_STUCK_KEY_RCV_MASK    (0x1 << SM5502_REG_INTM2_STUCK_KEY_RCV_SHIFT)
+#define SM5502_REG_INTM2_MHL_MASK              (0x1 << SM5502_REG_INTM2_MHL_SHIFT)
+
+#define SM5502_REG_ADC_SHIFT                   0
+#define SM5502_REG_ADC_MASK                    (0x1f << SM5502_REG_ADC_SHIFT)
+
+#define SM5502_REG_TIMING_SET1_KEY_PRESS_SHIFT 4
+#define SM5502_REG_TIMING_SET1_KEY_PRESS_MASK  (0xf << SM5502_REG_TIMING_SET1_KEY_PRESS_SHIFT)
+#define TIMING_KEY_PRESS_100MS                 0x0
+#define TIMING_KEY_PRESS_200MS                 0x1
+#define TIMING_KEY_PRESS_300MS                 0x2
+#define TIMING_KEY_PRESS_400MS                 0x3
+#define TIMING_KEY_PRESS_500MS                 0x4
+#define TIMING_KEY_PRESS_600MS                 0x5
+#define TIMING_KEY_PRESS_700MS                 0x6
+#define TIMING_KEY_PRESS_800MS                 0x7
+#define TIMING_KEY_PRESS_900MS                 0x8
+#define TIMING_KEY_PRESS_1000MS                        0x9
+#define SM5502_REG_TIMING_SET1_ADC_DET_SHIFT   0
+#define SM5502_REG_TIMING_SET1_ADC_DET_MASK    (0xf << SM5502_REG_TIMING_SET1_ADC_DET_SHIFT)
+#define TIMING_ADC_DET_50MS                    0x0
+#define TIMING_ADC_DET_100MS                   0x1
+#define TIMING_ADC_DET_150MS                   0x2
+#define TIMING_ADC_DET_200MS                   0x3
+#define TIMING_ADC_DET_300MS                   0x4
+#define TIMING_ADC_DET_400MS                   0x5
+#define TIMING_ADC_DET_500MS                   0x6
+#define TIMING_ADC_DET_600MS                   0x7
+#define TIMING_ADC_DET_700MS                   0x8
+#define TIMING_ADC_DET_800MS                   0x9
+#define TIMING_ADC_DET_900MS                   0xA
+#define TIMING_ADC_DET_1000MS                  0xB
+
+#define SM5502_REG_TIMING_SET2_SW_WAIT_SHIFT   4
+#define SM5502_REG_TIMING_SET2_SW_WAIT_MASK    (0xf << SM5502_REG_TIMING_SET2_SW_WAIT_SHIFT)
+#define TIMING_SW_WAIT_10MS                    0x0
+#define TIMING_SW_WAIT_30MS                    0x1
+#define TIMING_SW_WAIT_50MS                    0x2
+#define TIMING_SW_WAIT_70MS                    0x3
+#define TIMING_SW_WAIT_90MS                    0x4
+#define TIMING_SW_WAIT_110MS                   0x5
+#define TIMING_SW_WAIT_130MS                   0x6
+#define TIMING_SW_WAIT_150MS                   0x7
+#define TIMING_SW_WAIT_170MS                   0x8
+#define TIMING_SW_WAIT_190MS                   0x9
+#define TIMING_SW_WAIT_210MS                   0xA
+#define SM5502_REG_TIMING_SET2_LONG_KEY_SHIFT  0
+#define SM5502_REG_TIMING_SET2_LONG_KEY_MASK   (0xf << SM5502_REG_TIMING_SET2_LONG_KEY_SHIFT)
+#define TIMING_LONG_KEY_300MS                  0x0
+#define TIMING_LONG_KEY_400MS                  0x1
+#define TIMING_LONG_KEY_500MS                  0x2
+#define TIMING_LONG_KEY_600MS                  0x3
+#define TIMING_LONG_KEY_700MS                  0x4
+#define TIMING_LONG_KEY_800MS                  0x5
+#define TIMING_LONG_KEY_900MS                  0x6
+#define TIMING_LONG_KEY_1000MS                 0x7
+#define TIMING_LONG_KEY_1100MS                 0x8
+#define TIMING_LONG_KEY_1200MS                 0x9
+#define TIMING_LONG_KEY_1300MS                 0xA
+#define TIMING_LONG_KEY_1400MS                 0xB
+#define TIMING_LONG_KEY_1500MS                 0xC
+
+#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE1_SHIFT         0
+#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE2_SHIFT         1
+#define SM5502_REG_DEV_TYPE1_USB_SDP_SHIFT             2
+#define SM5502_REG_DEV_TYPE1_UART_SHIFT                        3
+#define SM5502_REG_DEV_TYPE1_CAR_KIT_CHARGER_SHIFT     4
+#define SM5502_REG_DEV_TYPE1_USB_CHG_SHIFT             5
+#define SM5502_REG_DEV_TYPE1_DEDICATED_CHG_SHIFT       6
+#define SM5502_REG_DEV_TYPE1_USB_OTG_SHIFT             7
+#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE1_MASK          (0x1 << SM5502_REG_DEV_TYPE1_AUDIO_TYPE1_SHIFT)
+#define SM5502_REG_DEV_TYPE1_AUDIO_TYPE1__MASK         (0x1 << SM5502_REG_DEV_TYPE1_AUDIO_TYPE2_SHIFT)
+#define SM5502_REG_DEV_TYPE1_USB_SDP_MASK              (0x1 << SM5502_REG_DEV_TYPE1_USB_SDP_SHIFT)
+#define SM5502_REG_DEV_TYPE1_UART_MASK                 (0x1 << SM5502_REG_DEV_TYPE1_UART_SHIFT)
+#define SM5502_REG_DEV_TYPE1_CAR_KIT_CHARGER_MASK      (0x1 << SM5502_REG_DEV_TYPE1_CAR_KIT_CHARGER_SHIFT)
+#define SM5502_REG_DEV_TYPE1_USB_CHG_MASK              (0x1 << SM5502_REG_DEV_TYPE1_USB_CHG_SHIFT)
+#define SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK                (0x1 << SM5502_REG_DEV_TYPE1_DEDICATED_CHG_SHIFT)
+#define SM5502_REG_DEV_TYPE1_USB_OTG_MASK              (0x1 << SM5502_REG_DEV_TYPE1_USB_OTG_SHIFT)
+
+#define SM5502_REG_DEV_TYPE2_JIG_USB_ON_SHIFT          0
+#define SM5502_REG_DEV_TYPE2_JIG_USB_OFF_SHIFT         1
+#define SM5502_REG_DEV_TYPE2_JIG_UART_ON_SHIFT         2
+#define SM5502_REG_DEV_TYPE2_JIG_UART_OFF_SHIFT                3
+#define SM5502_REG_DEV_TYPE2_PPD_SHIFT                 4
+#define SM5502_REG_DEV_TYPE2_TTY_SHIFT                 5
+#define SM5502_REG_DEV_TYPE2_AV_CABLE_SHIFT            6
+#define SM5502_REG_DEV_TYPE2_JIG_USB_ON_MASK           (0x1 << SM5502_REG_DEV_TYPE2_JIG_USB_ON_SHIFT)
+#define SM5502_REG_DEV_TYPE2_JIG_USB_OFF_MASK          (0x1 << SM5502_REG_DEV_TYPE2_JIG_USB_OFF_SHIFT)
+#define SM5502_REG_DEV_TYPE2_JIG_UART_ON_MASK          (0x1 << SM5502_REG_DEV_TYPE2_JIG_UART_ON_SHIFT)
+#define SM5502_REG_DEV_TYPE2_JIG_UART_OFF_MASK         (0x1 << SM5502_REG_DEV_TYPE2_JIG_UART_OFF_SHIFT)
+#define SM5502_REG_DEV_TYPE2_PPD_MASK                  (0x1 << SM5502_REG_DEV_TYPE2_PPD_SHIFT)
+#define SM5502_REG_DEV_TYPE2_TTY_MASK                  (0x1 << SM5502_REG_DEV_TYPE2_TTY_SHIFT)
+#define SM5502_REG_DEV_TYPE2_AV_CABLE_MASK             (0x1 << SM5502_REG_DEV_TYPE2_AV_CABLE_SHIFT)
+
+/* SM5502 Interrupts */
+enum sm5502_irq {
+       /* INT1 */
+       SM5502_IRQ_INT1_ATTACH,
+       SM5502_IRQ_INT1_DETACH,
+       SM5502_IRQ_INT1_KP,
+       SM5502_IRQ_INT1_LKP,
+       SM5502_IRQ_INT1_LKR,
+       SM5502_IRQ_INT1_OVP_EVENT,
+       SM5502_IRQ_INT1_OCP_EVENT,
+       SM5502_IRQ_INT1_OVP_OCP_DIS,
+
+       /* INT2 */
+       SM5502_IRQ_INT2_VBUS_DET,
+       SM5502_IRQ_INT2_REV_ACCE,
+       SM5502_IRQ_INT2_ADC_CHG,
+       SM5502_IRQ_INT2_STUCK_KEY,
+       SM5502_IRQ_INT2_STUCK_KEY_RCV,
+       SM5502_IRQ_INT2_MHL,
+
+       SM5502_IRQ_NUM,
+};
+
+#define SM5502_IRQ_INT1_ATTACH_MASK            BIT(0)
+#define SM5502_IRQ_INT1_DETACH_MASK            BIT(1)
+#define SM5502_IRQ_INT1_KP_MASK                        BIT(2)
+#define SM5502_IRQ_INT1_LKP_MASK               BIT(3)
+#define SM5502_IRQ_INT1_LKR_MASK               BIT(4)
+#define SM5502_IRQ_INT1_OVP_EVENT_MASK         BIT(5)
+#define SM5502_IRQ_INT1_OCP_EVENT_MASK         BIT(6)
+#define SM5502_IRQ_INT1_OVP_OCP_DIS_MASK       BIT(7)
+#define SM5502_IRQ_INT2_VBUS_DET_MASK          BIT(0)
+#define SM5502_IRQ_INT2_REV_ACCE_MASK          BIT(1)
+#define SM5502_IRQ_INT2_ADC_CHG_MASK           BIT(2)
+#define SM5502_IRQ_INT2_STUCK_KEY_MASK         BIT(3)
+#define SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK     BIT(4)
+#define SM5502_IRQ_INT2_MHL_MASK               BIT(5)
+
+#endif /*  __LINUX_EXTCON_SM5502_H */