#include <linux/irqdomain.h>
#define DEV_NAME "max8997-muic"
+#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
-/* MAX8997-MUIC STATUS1 register */
-#define STATUS1_ADC_SHIFT 0
-#define STATUS1_ADCLOW_SHIFT 5
-#define STATUS1_ADCERR_SHIFT 6
-#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
-#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
-#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
-
-/* MAX8997-MUIC STATUS2 register */
-#define STATUS2_CHGTYP_SHIFT 0
-#define STATUS2_CHGDETRUN_SHIFT 3
-#define STATUS2_DCDTMR_SHIFT 4
-#define STATUS2_DBCHG_SHIFT 5
-#define STATUS2_VBVOLT_SHIFT 6
-#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
-#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
-#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
-#define STATUS2_DBCHG_MASK (0x1 << STATUS2_DBCHG_SHIFT)
-#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
-
-/* MAX8997-MUIC STATUS3 register */
-#define STATUS3_OVP_SHIFT 2
-#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
-
-/* MAX8997-MUIC CONTROL1 register */
-#define COMN1SW_SHIFT 0
-#define COMP2SW_SHIFT 3
-#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
-#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
-#define SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
-
-#define MAX8997_SW_USB ((1 << COMP2SW_SHIFT) | (1 << COMN1SW_SHIFT))
-#define MAX8997_SW_AUDIO ((2 << COMP2SW_SHIFT) | (2 << COMN1SW_SHIFT))
-#define MAX8997_SW_UART ((3 << COMP2SW_SHIFT) | (3 << COMN1SW_SHIFT))
-#define MAX8997_SW_OPEN ((0 << COMP2SW_SHIFT) | (0 << COMN1SW_SHIFT))
-
-#define MAX8997_ADC_GROUND 0x00
-#define MAX8997_ADC_MHL 0x01
-#define MAX8997_ADC_JIG_USB_1 0x18
-#define MAX8997_ADC_JIG_USB_2 0x19
-#define MAX8997_ADC_DESKDOCK 0x1a
-#define MAX8997_ADC_JIG_UART 0x1c
-#define MAX8997_ADC_CARDOCK 0x1d
-#define MAX8997_ADC_OPEN 0x1f
+enum max8997_muic_adc_debounce_time {
+ ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */
+ ADC_DEBOUNCE_TIME_10MS, /* 10ms */
+ ADC_DEBOUNCE_TIME_25MS, /* 25ms */
+ ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */
+};
struct max8997_muic_irq {
unsigned int irq;
};
static struct max8997_muic_irq muic_irqs[] = {
- { MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
- { MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
- { MAX8997_MUICIRQ_ADC, "muic-ADC" },
- { MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
- { MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
- { MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
- { MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
- { MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
- { MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
+ { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" },
+ { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" },
+ { MAX8997_MUICIRQ_ADC, "muic-ADC" },
+ { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" },
+ { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" },
+ { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" },
+ { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" },
+ { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" },
+ { MAX8997_MUICIRQ_OVP, "muic-OVP" },
+};
+
+/* Define supported cable type */
+enum max8997_muic_acc_type {
+ MAX8997_MUIC_ADC_GROUND = 0x0,
+ MAX8997_MUIC_ADC_MHL, /* MHL*/
+ MAX8997_MUIC_ADC_REMOTE_S1_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S2_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S3_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S4_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S5_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S6_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S7_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S8_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S9_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S10_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S11_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S12_BUTTON,
+ MAX8997_MUIC_ADC_RESERVED_ACC_1,
+ MAX8997_MUIC_ADC_RESERVED_ACC_2,
+ MAX8997_MUIC_ADC_RESERVED_ACC_3,
+ MAX8997_MUIC_ADC_RESERVED_ACC_4,
+ MAX8997_MUIC_ADC_RESERVED_ACC_5,
+ MAX8997_MUIC_ADC_CEA936_AUDIO,
+ MAX8997_MUIC_ADC_PHONE_POWERED_DEV,
+ MAX8997_MUIC_ADC_TTY_CONVERTER,
+ MAX8997_MUIC_ADC_UART_CABLE,
+ MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG,
+ MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */
+ MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */
+ MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */
+ MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG,
+ MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */
+ MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */
+ MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE,
+ MAX8997_MUIC_ADC_OPEN, /* OPEN */
+};
+
+enum max8997_muic_cable_group {
+ MAX8997_CABLE_GROUP_ADC = 0,
+ MAX8997_CABLE_GROUP_ADC_GND,
+ MAX8997_CABLE_GROUP_CHG,
+ MAX8997_CABLE_GROUP_VBVOLT,
+};
+
+enum max8997_muic_usb_type {
+ MAX8997_USB_HOST,
+ MAX8997_USB_DEVICE,
+};
+
+enum max8997_muic_charger_type {
+ MAX8997_CHARGER_TYPE_NONE = 0,
+ MAX8997_CHARGER_TYPE_USB,
+ MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT,
+ MAX8997_CHARGER_TYPE_DEDICATED_CHG,
+ MAX8997_CHARGER_TYPE_500MA,
+ MAX8997_CHARGER_TYPE_1A,
+ MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7,
};
struct max8997_muic_info {
struct device *dev;
struct i2c_client *muic;
- struct max8997_muic_platform_data *muic_pdata;
+ struct extcon_dev *edev;
+ int prev_cable_type;
+ int prev_chg_type;
+ u8 status[2];
int irq;
struct work_struct irq_work;
+ struct mutex mutex;
+ struct max8997_muic_platform_data *muic_pdata;
enum max8997_muic_charger_type pre_charger_type;
- int pre_adc;
- 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;
+
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ int path_usb;
+ int path_uart;
+};
- struct extcon_dev *edev;
+enum {
+ EXTCON_CABLE_USB = 0,
+ EXTCON_CABLE_USB_HOST,
+ EXTCON_CABLE_TA,
+ EXTCON_CABLE_FAST_CHARGER,
+ EXTCON_CABLE_SLOW_CHARGER,
+ EXTCON_CABLE_CHARGE_DOWNSTREAM,
+ EXTCON_CABLE_MHL,
+ EXTCON_CABLE_DOCK_DESK,
+ EXTCON_CABLE_DOCK_CARD,
+ EXTCON_CABLE_JIG,
+
+ _EXTCON_CABLE_NUM,
};
-const char *max8997_extcon_cable[] = {
- [0] = "USB",
- [1] = "USB-Host",
- [2] = "TA",
- [3] = "Fast-charger",
- [4] = "Slow-charger",
- [5] = "Charge-downstream",
- [6] = "MHL",
- [7] = "Dock-desk",
- [8] = "Dock-card",
- [9] = "JIG",
+static const char *max8997_extcon_cable[] = {
+ [EXTCON_CABLE_USB] = "USB",
+ [EXTCON_CABLE_USB_HOST] = "USB-Host",
+ [EXTCON_CABLE_TA] = "TA",
+ [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
+ [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
+ [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
+ [EXTCON_CABLE_MHL] = "MHL",
+ [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
+ [EXTCON_CABLE_DOCK_CARD] = "Dock-Card",
+ [EXTCON_CABLE_JIG] = "JIG",
NULL,
};
+/*
+ * max8997_muic_set_debounce_time - Set the debounce time of ADC
+ * @info: the instance including private data of max8997 MUIC
+ * @time: the debounce time of ADC
+ */
+static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
+ enum max8997_muic_adc_debounce_time time)
+{
+ int ret;
+
+ switch (time) {
+ case ADC_DEBOUNCE_TIME_0_5MS:
+ case ADC_DEBOUNCE_TIME_10MS:
+ case ADC_DEBOUNCE_TIME_25MS:
+ case ADC_DEBOUNCE_TIME_38_62MS:
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL3,
+ time << CONTROL3_ADCDBSET_SHIFT,
+ CONTROL3_ADCDBSET_MASK);
+ if (ret) {
+ dev_err(info->dev, "failed to set ADC debounce time\n");
+ return -EAGAIN;
+ }
+ break;
+ default:
+ dev_err(info->dev, "invalid ADC debounce time\n");
+ return -EINVAL;
+ }
+
+ return 0;
+};
+
+/*
+ * max8997_muic_set_path - Set hardware line according to attached cable
+ * @info: the instance including private data of max8997 MUIC
+ * @value: the path according to attached cable
+ * @attached: the state of cable (true:attached, false:detached)
+ *
+ * The max8997 MUIC device share outside H/W line among a varity of cables,
+ * so this function set internal path of H/W line according to the type of
+ * attached cable.
+ */
+static int max8997_muic_set_path(struct max8997_muic_info *info,
+ u8 val, bool attached)
+{
+ int ret = 0;
+ u8 ctrl1, ctrl2 = 0;
+
+ if (attached)
+ ctrl1 = val;
+ else
+ ctrl1 = CONTROL1_SW_OPEN;
+
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return -EAGAIN;
+ }
+
+ if (attached)
+ ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
+ else
+ ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
+
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL2, ctrl2,
+ CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return -EAGAIN;
+ }
+
+ dev_info(info->dev,
+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+ ctrl1, ctrl2, attached ? "attached" : "detached");
+
+ return 0;
+}
+
+/*
+ * max8997_muic_get_cable_type - Return cable type and check cable state
+ * @info: the instance including private data of max8997 MUIC
+ * @group: the path according to attached cable
+ * @attached: store cable state and return
+ *
+ * This function check the cable state either attached or detached,
+ * and then divide precise type of cable according to cable group.
+ * - MAX8997_CABLE_GROUP_ADC
+ * - MAX8997_CABLE_GROUP_CHG
+ */
+static int max8997_muic_get_cable_type(struct max8997_muic_info *info,
+ enum max8997_muic_cable_group group, bool *attached)
+{
+ int cable_type = 0;
+ int adc;
+ int chg_type;
+
+ switch (group) {
+ case MAX8997_CABLE_GROUP_ADC:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ /*
+ * Check current cable state/cable type and store cable type
+ * (info->prev_cable_type) for handling cable when cable is
+ * detached.
+ */
+ if (adc == MAX8997_MUIC_ADC_OPEN) {
+ *attached = false;
+
+ cable_type = info->prev_cable_type;
+ info->prev_cable_type = MAX8997_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+
+ cable_type = info->prev_cable_type = adc;
+ }
+ break;
+ case MAX8997_CABLE_GROUP_CHG:
+ /*
+ * Read charger type to check cable type and decide cable state
+ * according to type of charger cable.
+ */
+ chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ if (chg_type == MAX8997_CHARGER_TYPE_NONE) {
+ *attached = false;
+
+ cable_type = info->prev_chg_type;
+ info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE;
+ } else {
+ *attached = true;
+
+ /*
+ * Check current cable state/cable type and store cable
+ * type(info->prev_chg_type) for handling cable when
+ * charger cable is detached.
+ */
+ cable_type = info->prev_chg_type = chg_type;
+ }
+
+ break;
+ default:
+ dev_err(info->dev, "Unknown cable group (%d)\n", group);
+ cable_type = -EINVAL;
+ break;
+ }
+
+ return cable_type;
+}
+
static int max8997_muic_handle_usb(struct max8997_muic_info *info,
enum max8997_muic_usb_type usb_type, bool attached)
{
int ret = 0;
if (usb_type == MAX8997_USB_HOST) {
- /* switch to USB */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
- SW_MASK);
- if (ret) {
+ ret = max8997_muic_set_path(info, info->path_usb, attached);
+ if (ret < 0) {
dev_err(info->dev, "failed to update muic register\n");
- goto out;
+ return ret;
}
}
extcon_set_cable_state(info->edev, "USB", attached);
break;
default:
- ret = -EINVAL;
- break;
+ dev_err(info->dev, "failed to detect %s usb cable\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
}
-out:
- return ret;
+ return 0;
}
static int max8997_muic_handle_dock(struct max8997_muic_info *info,
- int adc, bool attached)
+ int cable_type, bool attached)
{
int ret = 0;
- /* switch to AUDIO */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
- SW_MASK);
+ ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
if (ret) {
dev_err(info->dev, "failed to update muic register\n");
- goto out;
+ return ret;
}
- switch (adc) {
- case MAX8997_ADC_DESKDOCK:
+ switch (cable_type) {
+ case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
extcon_set_cable_state(info->edev, "Dock-desk", attached);
break;
- case MAX8997_ADC_CARDOCK:
+ case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
extcon_set_cable_state(info->edev, "Dock-card", attached);
break;
default:
- ret = -EINVAL;
- break;
+ dev_err(info->dev, "failed to detect %s dock device\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
}
-out:
- return ret;
+
+ return 0;
}
static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
int ret = 0;
/* switch to UART */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
- SW_MASK);
+ ret = max8997_muic_set_path(info, info->path_uart, attached);
if (ret) {
dev_err(info->dev, "failed to update muic register\n");
- goto out;
+ return -EINVAL;
}
extcon_set_cable_state(info->edev, "JIG", attached);
-out:
- return ret;
-}
-
-static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
-{
- int ret = 0;
- switch (info->pre_adc) {
- case MAX8997_ADC_GROUND:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
- break;
- case MAX8997_ADC_MHL:
- extcon_set_cable_state(info->edev, "MHL", false);
- break;
- case MAX8997_ADC_JIG_USB_1:
- case MAX8997_ADC_JIG_USB_2:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
- break;
- case MAX8997_ADC_DESKDOCK:
- case MAX8997_ADC_CARDOCK:
- ret = max8997_muic_handle_dock(info, info->pre_adc, false);
- break;
- case MAX8997_ADC_JIG_UART:
- ret = max8997_muic_handle_jig_uart(info, false);
- break;
- default:
- break;
- }
-
- return ret;
+ return 0;
}
-static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
+static int max8997_muic_adc_handler(struct max8997_muic_info *info)
{
+ int cable_type;
+ bool attached;
int ret = 0;
- switch (adc) {
- case MAX8997_ADC_GROUND:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
- break;
- case MAX8997_ADC_MHL:
- extcon_set_cable_state(info->edev, "MHL", true);
- break;
- case MAX8997_ADC_JIG_USB_1:
- case MAX8997_ADC_JIG_USB_2:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
- break;
- case MAX8997_ADC_DESKDOCK:
- case MAX8997_ADC_CARDOCK:
- ret = max8997_muic_handle_dock(info, adc, true);
- break;
- case MAX8997_ADC_JIG_UART:
- ret = max8997_muic_handle_jig_uart(info, true);
- break;
- case MAX8997_ADC_OPEN:
- ret = max8997_muic_handle_adc_detach(info);
- break;
- default:
- ret = -EINVAL;
- goto out;
- }
-
- info->pre_adc = adc;
-out:
- return ret;
-}
-
-static int max8997_muic_handle_charger_type_detach(
- struct max8997_muic_info *info)
-{
- switch (info->pre_charger_type) {
- case MAX8997_CHARGER_TYPE_USB:
- extcon_set_cable_state(info->edev, "USB", false);
- break;
- case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
- extcon_set_cable_state(info->edev, "Charge-downstream", false);
- break;
- case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
- extcon_set_cable_state(info->edev, "TA", false);
- break;
- case MAX8997_CHARGER_TYPE_500MA:
- extcon_set_cable_state(info->edev, "Slow-charger", false);
- break;
- case MAX8997_CHARGER_TYPE_1A:
- extcon_set_cable_state(info->edev, "Fast-charger", false);
- break;
+ /* Check cable state which is either detached or attached */
+ cable_type = max8997_muic_get_cable_type(info,
+ MAX8997_CABLE_GROUP_ADC, &attached);
+
+ switch (cable_type) {
+ case MAX8997_MUIC_ADC_GROUND:
+ ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX8997_MUIC_ADC_MHL:
+ extcon_set_cable_state(info->edev, "MHL", attached);
+ break;
+ case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF:
+ case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON:
+ ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
+ case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
+ ret = max8997_muic_handle_dock(info, cable_type, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ ret = max8997_muic_handle_jig_uart(info, attached);
+ break;
+ case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_1:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_2:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_3:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_4:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_5:
+ case MAX8997_MUIC_ADC_CEA936_AUDIO:
+ case MAX8997_MUIC_ADC_PHONE_POWERED_DEV:
+ case MAX8997_MUIC_ADC_TTY_CONVERTER:
+ case MAX8997_MUIC_ADC_UART_CABLE:
+ case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG:
+ case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG:
+ case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE:
+ /*
+ * This cable isn't used in general case if it is specially
+ * needed to detect additional cable, should implement
+ * proper operation when this cable is attached/detached.
+ */
+ dev_info(info->dev,
+ "cable is %s but it isn't used (type:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EAGAIN;
default:
+ dev_err(info->dev,
+ "failed to detect %s unknown cable (type:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
return -EINVAL;
- break;
}
return 0;
}
-static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
- enum max8997_muic_charger_type charger_type)
+static int max8997_muic_chg_handler(struct max8997_muic_info *info)
{
- u8 adc;
- int ret;
+ int chg_type;
+ bool attached;
+ int adc;
- ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
- if (ret) {
- dev_err(info->dev, "failed to read muic register\n");
- goto out;
- }
+ chg_type = max8997_muic_get_cable_type(info,
+ MAX8997_CABLE_GROUP_CHG, &attached);
- switch (charger_type) {
+ switch (chg_type) {
case MAX8997_CHARGER_TYPE_NONE:
- ret = max8997_muic_handle_charger_type_detach(info);
break;
case MAX8997_CHARGER_TYPE_USB:
- if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) {
max8997_muic_handle_usb(info,
- MAX8997_USB_DEVICE, true);
+ MAX8997_USB_DEVICE, attached);
}
break;
case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
- extcon_set_cable_state(info->edev, "Charge-downstream", true);
+ extcon_set_cable_state(info->edev, "Charge-downstream", attached);
break;
case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
- extcon_set_cable_state(info->edev, "TA", true);
+ extcon_set_cable_state(info->edev, "TA", attached);
break;
case MAX8997_CHARGER_TYPE_500MA:
- extcon_set_cable_state(info->edev, "Slow-charger", true);
+ extcon_set_cable_state(info->edev, "Slow-charger", attached);
break;
case MAX8997_CHARGER_TYPE_1A:
- extcon_set_cable_state(info->edev, "Fast-charger", true);
+ extcon_set_cable_state(info->edev, "Fast-charger", attached);
break;
default:
- ret = -EINVAL;
- goto out;
+ dev_err(info->dev,
+ "failed to detect %s unknown chg cable (type:0x%x)\n",
+ attached ? "attached" : "detached", chg_type);
+ return -EINVAL;
}
- info->pre_charger_type = charger_type;
-out:
- return ret;
+ return 0;
}
static void max8997_muic_irq_work(struct work_struct *work)
{
struct max8997_muic_info *info = container_of(work,
struct max8997_muic_info, irq_work);
- u8 status[2];
- u8 adc, chg_type;
int irq_type = 0;
int i, ret;
+ if (!info->edev)
+ return;
+
mutex_lock(&info->mutex);
+ for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
+ if (info->irq == muic_irqs[i].virq)
+ irq_type = muic_irqs[i].irq;
+
ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
- 2, status);
+ 2, info->status);
if (ret) {
dev_err(info->dev, "failed to read muic register\n");
mutex_unlock(&info->mutex);
return;
}
- dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
- status[0], status[1]);
-
- for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
- if (info->irq == muic_irqs[i].virq)
- irq_type = muic_irqs[i].irq;
-
switch (irq_type) {
+ case MAX8997_MUICIRQ_ADCError:
+ case MAX8997_MUICIRQ_ADCLow:
case MAX8997_MUICIRQ_ADC:
- adc = status[0] & STATUS1_ADC_MASK;
- adc >>= STATUS1_ADC_SHIFT;
-
- max8997_muic_handle_adc(info, adc);
+ /* Handle all of cable except for charger cable */
+ ret = max8997_muic_adc_handler(info);
break;
+ case MAX8997_MUICIRQ_VBVolt:
+ case MAX8997_MUICIRQ_DBChg:
+ case MAX8997_MUICIRQ_DCDTmr:
+ case MAX8997_MUICIRQ_ChgDetRun:
case MAX8997_MUICIRQ_ChgTyp:
- chg_type = status[1] & STATUS2_CHGTYP_MASK;
- chg_type >>= STATUS2_CHGTYP_SHIFT;
-
- max8997_muic_handle_charger_type(info, chg_type);
+ /* Handle charger cable */
+ ret = max8997_muic_chg_handler(info);
+ break;
+ case MAX8997_MUICIRQ_OVP:
break;
default:
dev_info(info->dev, "misc interrupt: irq %d occurred\n",
irq_type);
- break;
+ mutex_unlock(&info->mutex);
+ return;
}
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
mutex_unlock(&info->mutex);
return;
return IRQ_HANDLED;
}
-static void max8997_muic_detect_dev(struct max8997_muic_info *info)
+static int max8997_muic_detect_dev(struct max8997_muic_info *info)
{
- int ret;
- u8 status[2], adc, chg_type;
+ int ret = 0;
+ int adc;
+ int chg_type;
+ bool attached;
- ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
- 2, status);
+ mutex_lock(&info->mutex);
+
+ /* Read STATUSx register to detect accessory */
+ ret = max8997_bulk_read(info->muic,
+ MAX8997_MUIC_REG_STATUS1, 2, info->status);
if (ret) {
- dev_err(info->dev, "failed to read muic register\n");
- return;
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return -EINVAL;
}
- dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
- status[0], status[1]);
+ adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC,
+ &attached);
+ if (attached && adc != MAX8997_MUIC_ADC_OPEN) {
+ ret = max8997_muic_adc_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect ADC cable\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
- adc = status[0] & STATUS1_ADC_MASK;
- adc >>= STATUS1_ADC_SHIFT;
+ chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG,
+ &attached);
+ if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) {
+ ret = max8997_muic_chg_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect charger cable\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
+
+ mutex_unlock(&info->mutex);
+
+ return 0;
+}
- chg_type = status[1] & STATUS2_CHGTYP_MASK;
- chg_type >>= STATUS2_CHGTYP_SHIFT;
+static void max8997_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct max8997_muic_info *info = container_of(to_delayed_work(work),
+ struct max8997_muic_info, wq_detcable);
+ int ret;
- max8997_muic_handle_adc(info, adc);
- max8997_muic_handle_charger_type(info, chg_type);
+ ret = max8997_muic_detect_dev(info);
+ if (ret < 0)
+ pr_err("failed to detect cable type\n");
}
static int max8997_muic_probe(struct platform_device *pdev)
struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
struct max8997_muic_info *info;
+ int delay_jiffies;
int ret, i;
info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
}
muic_irq->virq = virq;
- ret = request_threaded_irq(virq, NULL, max8997_muic_irq_handler,
- 0, muic_irq->name, info);
+ ret = request_threaded_irq(virq, NULL,
+ max8997_muic_irq_handler,
+ IRQF_NO_SUSPEND,
+ muic_irq->name, info);
if (ret) {
dev_err(&pdev->dev,
"failed: irq request (IRQ: %d,"
}
}
- /* Initial device detection */
- max8997_muic_detect_dev(info);
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ if (pdata->muic_pdata->path_uart)
+ info->path_uart = pdata->muic_pdata->path_uart;
+ else
+ info->path_uart = CONTROL1_SW_UART;
+
+ if (pdata->muic_pdata->path_usb)
+ info->path_usb = pdata->muic_pdata->path_usb;
+ else
+ info->path_usb = CONTROL1_SW_USB;
+
+ /* Set initial path for UART */
+ max8997_muic_set_path(info, info->path_uart, true);
+
+ /* Set ADC debounce time */
+ max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
+ /*
+ * 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, max8997_muic_detect_cable_wq);
+ if (pdata->muic_pdata->detcable_delay_ms)
+ delay_jiffies = msecs_to_jiffies(pdata->muic_pdata->detcable_delay_ms);
+ else
+ delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
+ schedule_delayed_work(&info->wq_detcable, delay_jiffies);
- return ret;
+ return 0;
err_irq:
while (--i >= 0)
projects / karo-tx-linux.git / blobdiff