extcon: max77693: Add support Dock-Smart device for desktop mode
authorChanwoo Choi <cw00.choi@samsung.com>
Mon, 10 Dec 2012 10:07:53 +0000 (19:07 +0900)
committerChanwoo Choi <cw00.choi@samsung.com>
Tue, 15 Jan 2013 06:42:16 +0000 (15:42 +0900)
This patch support the detection of Dock-Smart device which include
three type of port(HDMI, USB for mouse/keyboard and Micro-USB for
USB/TA cable).The Dock-Smart device need always exteranl power supply
(USB/TA cable through micro-usb cable). Dock-Smart device support screen
output of target to separate monitor and mouse/keyboard for desktop
mode.

Features of 'Dock-Smart device'
- Support HDMI
- Support external output feature of audio
- Support charging through micro-usb port without data
  connection if TA cable is connected to target.
- Support charging and data connection through micro-usb port
  if USB cable is connected between target and host device.
- Support OTG device (Mouse/Keyboard)

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
drivers/extcon/extcon-max77693.c

index 28eff88..fb65276 100644 (file)
@@ -442,6 +442,8 @@ static int max77693_muic_dock_handler(struct max77693_muic_info *info,
                int cable_type, bool attached)
 {
        int ret = 0;
+       int vbvolt;
+       bool cable_attached;
        char dock_name[CABLE_NAME_MAX];
 
        dev_info(info->dev,
@@ -450,14 +452,45 @@ static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 
        switch (cable_type) {
        case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
-               /* PATH:AP_USB */
-               ret = max77693_muic_set_path(info,
-                               CONTROL1_SW_USB, attached);
+               /*
+                * Check power cable whether attached or detached state.
+                * The Dock-Smart device need surely external power supply.
+                * If power cable(USB/TA) isn't connected to Dock device,
+                * user can't use Dock-Smart for desktop mode.
+                */
+               vbvolt = max77693_muic_get_cable_type(info,
+                               MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
+               if (attached && !vbvolt) {
+                       dev_warn(info->dev,
+                               "Cannot detect external power supply\n");
+                       return 0;
+               }
+
+               /*
+                * Notify Dock-Smart/MHL state.
+                * - Dock-Smart device include three type of cable which
+                * are HDMI, USB for mouse/keyboard and micro-usb port
+                * for USB/TA cable. Dock-Smart device need always exteranl
+                * power supply(USB/TA cable through micro-usb cable). Dock-
+                * Smart device support screen output of target to separate
+                * monitor and mouse/keyboard for desktop mode.
+                *
+                * Features of 'USB/TA cable with Dock-Smart device'
+                * - Support MHL
+                * - Support external output feature of audio
+                * - Support charging through micro-usb port without data
+                *           connection if TA cable is connected to target.
+                * - Support charging and data connection through micro-usb port
+                *           if USB cable is connected between target and host
+                *           device.
+                * - Support OTG device (Mouse/Keyboard)
+                */
+               ret = max77693_muic_set_path(info, info->path_usb, attached);
                if (ret < 0)
-                       goto out;
+                       return ret;
 
-               /* Dock-Smart */
                extcon_set_cable_state(info->edev, "Dock-Smart", attached);
+               extcon_set_cable_state(info->edev, "MHL", attached);
                goto out;
        case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* Dock-Car */
                strcpy(dock_name, "Dock-Car");
@@ -475,11 +508,11 @@ static int max77693_muic_dock_handler(struct max77693_muic_info *info,
        /* Dock-Car/Desk/Audio, PATH:AUDIO */
        ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
        if (ret < 0)
-               goto out;
+               return ret;
        extcon_set_cable_state(info->edev, dock_name, attached);
 
 out:
-       return ret;
+       return 0;
 }
 
 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
@@ -737,80 +770,125 @@ static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 
        switch (chg_type) {
        case MAX77693_CHARGER_TYPE_USB:
+       case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
        case MAX77693_CHARGER_TYPE_NONE:
-               /*
-                * MHL_TA(USB/TA) with MHL cable
-                * - MHL cable include two port(HDMI line and separate micro
-                * -usb port. When the target connect MHL cable, extcon driver
-                * check whether MHL_TA(USB/TA) cable is connected. If MHL_TA
-                * cable is connected, extcon driver notify state to notifiee
-                * for charging battery.
-                */
+               /* Check MAX77693_CABLE_GROUP_ADC_GND type */
                cable_type_gnd = max77693_muic_get_cable_type(info,
                                        MAX77693_CABLE_GROUP_ADC_GND,
                                        &cable_attached);
-               if (cable_type_gnd == MAX77693_MUIC_GND_MHL
-                       || cable_type_gnd == MAX77693_MUIC_GND_MHL_VB) {
+               switch (cable_type_gnd) {
+               case MAX77693_MUIC_GND_MHL:
+               case MAX77693_MUIC_GND_MHL_VB:
+                       /*
+                        * MHL cable with MHL_TA(USB/TA) cable
+                        * - MHL cable include two port(HDMI line and separate micro-
+                        * usb port. When the target connect MHL cable, extcon driver
+                        * check whether MHL_TA(USB/TA) cable is connected. If MHL_TA
+                        * cable is connected, extcon driver notify state to notifiee
+                        * for charging battery.
+                        *
+                        * Features of 'MHL_TA(USB/TA) with MHL cable'
+                        * - Support MHL
+                        * - Support charging through micro-usb port without data connection
+                        */
                        extcon_set_cable_state(info->edev, "MHL_TA", attached);
-
                        if (!cable_attached)
-                               extcon_set_cable_state(info->edev,
-                                       "MHL", false);
-                       goto out;
+                               extcon_set_cable_state(info->edev, "MHL", cable_attached);
+                       break;
                }
 
-               /*
-                * USB/TA cable with Dock-Audio device
-                * - Dock device include two port(Dock-Audio and micro-usb
-                * port). When the target connect Dock-Audio device, extcon
-                * driver check whether USB/TA cable is connected.
-                * If USB/TA cable is connected, extcon driver notify state
-                * to notifiee for charging battery.
-                */
+               /* Check MAX77693_CABLE_GROUP_ADC type */
                cable_type = max77693_muic_get_cable_type(info,
                                        MAX77693_CABLE_GROUP_ADC,
                                        &cable_attached);
-               if (cable_type == MAX77693_MUIC_ADC_AV_CABLE_NOLOAD) {
+               switch (cable_type) {
+               case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
+                       /*
+                        * Dock-Audio device with USB/TA cable
+                        * - Dock device include two port(Dock-Audio and micro-usb
+                        * port). When the target connect Dock-Audio device, extcon
+                        * driver check whether USB/TA cable is connected. If USB/TA
+                        * cable is connected, extcon driver notify state to notifiee
+                        * for charging battery.
+                        *
+                        * Features of 'USB/TA cable with Dock-Audio device'
+                        * - Support external output feature of audio.
+                        * - Support charging through micro-usb port without data
+                        *           connection.
+                        */
                        extcon_set_cable_state(info->edev, "USB", attached);
 
                        if (!cable_attached)
-                               extcon_set_cable_state(info->edev,
-                                               "Dock-Audio", false);
-                       goto out;
+                               extcon_set_cable_state(info->edev, "Dock-Audio", cable_attached);
+                       break;
+               case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
+                       /*
+                        * Dock-Smart device with USB/TA cable
+                        * - Dock-Desk device include three type of cable which
+                        * are HDMI, USB for mouse/keyboard and micro-usb port
+                        * for USB/TA cable. Dock-Smart device need always exteranl
+                        * power supply(USB/TA cable through micro-usb cable). Dock-
+                        * Smart device support screen output of target to separate
+                        * monitor and mouse/keyboard for desktop mode.
+                        *
+                        * Features of 'USB/TA cable with Dock-Smart device'
+                        * - Support MHL
+                        * - Support external output feature of audio
+                        * - Support charging through micro-usb port without data
+                        *           connection if TA cable is connected to target.
+                        * - Support charging and data connection through micro-usb port
+                        *           if USB cable is connected between target and host
+                        *           device.
+                        * - Support OTG device (Mouse/Keyboard)
+                        */
+                       ret = max77693_muic_set_path(info, info->path_usb, attached);
+                       if (ret < 0)
+                               return ret;
+
+                       extcon_set_cable_state(info->edev, "Dock-Smart", attached);
+                       extcon_set_cable_state(info->edev, "MHL", attached);
+
+                       break;
                }
 
-               /*
-                * When MHL(with USB/TA cable) or Dock-Audio with USB/TA cable
-                * is attached, muic device happen below two interrupt.
-                * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting MHL/Dock-Audio.
-                * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting USB/TA cable
-                *   connected to MHL or Dock-Audio.
-                * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC interrupt
-                * than MAX77693_MUIC_IRQ_INT2_CHGTYP interrupt.
-                *
-                * If user attach MHL (with USB/TA cable and immediately detach
-                * MHL with USB/TA cable before MAX77693_MUIC_IRQ_INT2_CHGTYP
-                * interrupt is happened, USB/TA cable remain connected state to
-                * target. But USB/TA cable isn't connected to target. The user
-                * be face with unusual action. So, driver should check this
-                * situation in spite of, that previous charger type is N/A.
-                */
-               if (chg_type == MAX77693_CHARGER_TYPE_NONE)
+               /* Check MAX77693_CABLE_GROUP_CHG type */
+               switch (chg_type) {
+               case MAX77693_CHARGER_TYPE_NONE:
+                       /*
+                        * When MHL(with USB/TA cable) or Dock-Audio with USB/TA cable
+                        * is attached, muic device happen below two interrupt.
+                        * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting MHL/Dock-Audio.
+                        * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting USB/TA cable
+                        *   connected to MHL or Dock-Audio.
+                        * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC interrupt
+                        * than MAX77693_MUIC_IRQ_INT2_CHGTYP interrupt.
+                        *
+                        * If user attach MHL (with USB/TA cable and immediately detach
+                        * MHL with USB/TA cable before MAX77693_MUIC_IRQ_INT2_CHGTYP
+                        * interrupt is happened, USB/TA cable remain connected state to
+                        * target. But USB/TA cable isn't connected to target. The user
+                        * be face with unusual action. So, driver should check this
+                        * situation in spite of, that previous charger type is N/A.
+                        */
                        break;
+               case MAX77693_CHARGER_TYPE_USB:
+                       /* Only USB cable, PATH:AP_USB */
+                       ret = max77693_muic_set_path(info, info->path_usb, attached);
+                       if (ret < 0)
+                               return ret;
 
-               /* Only USB cable, PATH:AP_USB */
-               ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
-               if (ret < 0)
-                       goto out;
-               extcon_set_cable_state(info->edev, "USB", attached);
+                       extcon_set_cable_state(info->edev, "USB", attached);
+                       break;
+               case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
+                       /* Only TA cable */
+                       extcon_set_cable_state(info->edev, "TA", attached);
+                       break;
+               }
                break;
        case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
                extcon_set_cable_state(info->edev,
                                "Charge-downstream", attached);
                break;
-       case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
-               extcon_set_cable_state(info->edev, "TA", attached);
-               break;
        case MAX77693_CHARGER_TYPE_APPLE_500MA:
                extcon_set_cable_state(info->edev, "Slow-charger", attached);
                break;
@@ -823,12 +901,10 @@ static int max77693_muic_chg_handler(struct max77693_muic_info *info)
                dev_err(info->dev,
                        "failed to detect %s accessory (chg_type:0x%x)\n",
                        attached ? "attached" : "detached", chg_type);
-               ret = -EINVAL;
-               goto out;
+               return -EINVAL;
        }
 
-out:
-       return ret;
+       return 0;
 }
 
 static void max77693_muic_irq_work(struct work_struct *work)