extcon: max14577: Add extcon-max14577 driver to support MUIC device

[firefly-linux-kernel-4.4.55.git] / drivers / extcon / extcon-arizona.c

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index a287cece0593c327c53e8961b70a0dde8b1af2ce..c20602f601ee22732635aa3fa04fe94e44ed6020 100644 (file)
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -44,6 +44,15 @@
 #define HPDET_DEBOUNCE 500
 #define DEFAULT_MICD_TIMEOUT 2000
 
+#define MICD_LVL_1_TO_7 (ARIZONA_MICD_LVL_1 | ARIZONA_MICD_LVL_2 | \
+                        ARIZONA_MICD_LVL_3 | ARIZONA_MICD_LVL_4 | \
+                        ARIZONA_MICD_LVL_5 | ARIZONA_MICD_LVL_6 | \
+                        ARIZONA_MICD_LVL_7)
+
+#define MICD_LVL_0_TO_7 (ARIZONA_MICD_LVL_0 | MICD_LVL_1_TO_7)
+
+#define MICD_LVL_0_TO_8 (MICD_LVL_0_TO_7 | ARIZONA_MICD_LVL_8)
+
 struct arizona_extcon_info {
        struct device *dev;
        struct arizona *arizona;
@@ -426,26 +435,15 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info)
                }
 
                val &= ARIZONA_HP_LVL_B_MASK;
+               /* Convert to ohms, the value is in 0.5 ohm increments */
+               val /= 2;
 
                regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
                            &range);
                range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
                           >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
 
-               /* Skip up or down a range? */
-               if (range && (val < arizona_hpdet_c_ranges[range].min)) {
-                       range--;
-                       dev_dbg(arizona->dev, "Moving to HPDET range %d-%d\n",
-                               arizona_hpdet_c_ranges[range].min,
-                               arizona_hpdet_c_ranges[range].max);
-                       regmap_update_bits(arizona->regmap,
-                                          ARIZONA_HEADPHONE_DETECT_1,
-                                          ARIZONA_HP_IMPEDANCE_RANGE_MASK,
-                                          range <<
-                                          ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
-                       return -EAGAIN;
-               }
-
+               /* Skip up a range, or report? */
                if (range < ARRAY_SIZE(arizona_hpdet_c_ranges) - 1 &&
                    (val >= arizona_hpdet_c_ranges[range].max)) {
                        range++;
@@ -459,6 +457,12 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info)
                                           ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
                        return -EAGAIN;
                }
+
+               if (range && (val < arizona_hpdet_c_ranges[range].min)) {
+                       dev_dbg(arizona->dev, "Reporting range boundary %d\n",
+                               arizona_hpdet_c_ranges[range].min);
+                       val = arizona_hpdet_c_ranges[range].min;
+               }
        }
 
        dev_dbg(arizona->dev, "HP impedance %d ohms\n", val);
@@ -594,9 +598,15 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data)
                dev_err(arizona->dev, "Failed to report HP/line: %d\n",
                        ret);
 
+done:
+       /* Reset back to starting range */
+       regmap_update_bits(arizona->regmap,
+                          ARIZONA_HEADPHONE_DETECT_1,
+                          ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL,
+                          0);
+
        arizona_extcon_do_magic(info, 0);
 
-done:
        if (id_gpio)
                gpio_set_value_cansleep(id_gpio, 0);
 
@@ -765,7 +775,20 @@ static void arizona_micd_detect(struct work_struct *work)
 
        mutex_lock(&info->lock);
 
-       for (i = 0; i < 10 && !(val & 0x7fc); i++) {
+       /* If the cable was removed while measuring ignore the result */
+       ret = extcon_get_cable_state_(&info->edev, ARIZONA_CABLE_MECHANICAL);
+       if (ret < 0) {
+               dev_err(arizona->dev, "Failed to check cable state: %d\n",
+                               ret);
+               mutex_unlock(&info->lock);
+               return;
+       } else if (!ret) {
+               dev_dbg(arizona->dev, "Ignoring MICDET for removed cable\n");
+               mutex_unlock(&info->lock);
+               return;
+       }
+
+       for (i = 0; i < 10 && !(val & MICD_LVL_0_TO_8); i++) {
                ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
                if (ret != 0) {
                        dev_err(arizona->dev,
@@ -784,7 +807,7 @@ static void arizona_micd_detect(struct work_struct *work)
                }
        }
 
-       if (i == 10 && !(val & 0x7fc)) {
+       if (i == 10 && !(val & MICD_LVL_0_TO_8)) {
                dev_err(arizona->dev, "Failed to get valid MICDET value\n");
                mutex_unlock(&info->lock);
                return;
@@ -798,7 +821,7 @@ static void arizona_micd_detect(struct work_struct *work)
        }
 
        /* If we got a high impedence we should have a headset, report it. */
-       if (info->detecting && (val & 0x400)) {
+       if (info->detecting && (val & ARIZONA_MICD_LVL_8)) {
                arizona_identify_headphone(info);
 
                ret = extcon_update_state(&info->edev,
@@ -827,7 +850,7 @@ static void arizona_micd_detect(struct work_struct *work)
         * plain headphones.  If both polarities report a low
         * impedence then give up and report headphones.
         */
-       if (info->detecting && (val & 0x3f8)) {
+       if (info->detecting && (val & MICD_LVL_1_TO_7)) {
                if (info->jack_flips >= info->micd_num_modes * 10) {
                        dev_dbg(arizona->dev, "Detected HP/line\n");
                        arizona_identify_headphone(info);
@@ -851,7 +874,7 @@ static void arizona_micd_detect(struct work_struct *work)
         * If we're still detecting and we detect a short then we've
         * got a headphone.  Otherwise it's a button press.
         */
-       if (val & 0x3fc) {
+       if (val & MICD_LVL_0_TO_7) {
                if (info->mic) {
                        dev_dbg(arizona->dev, "Mic button detected\n");
 
@@ -1126,6 +1149,16 @@ static int arizona_extcon_probe(struct platform_device *pdev)
                        break;
                }
                break;
+       case WM5110:
+               switch (arizona->rev) {
+               case 0 ... 2:
+                       break;
+               default:
+                       info->micd_clamp = true;
+                       info->hpdet_ip = 2;
+                       break;
+               }
+               break;
        default:
                break;
        }