1 files changed, 342 insertions, 9 deletions

diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index 744600eff222..d6918cb966c0 100644
--- a/drivers/input/keyboard/adp5588-keys.c
+++ b/drivers/input/keyboard/adp5588-keys.c
@@ -19,6 +19,7 @@
 #include <linux/platform_device.h>
 #include <linux/input.h>
 #include <linux/i2c.h>
+#include <linux/gpio.h>
 #include <linux/slab.h>
 
 #include <linux/i2c/adp5588.h>
@@ -54,6 +55,10 @@
 
 #define KEYP_MAX_EVENT		10
 
+#define MAXGPIO			18
+#define ADP_BANK(offs)		((offs) >> 3)
+#define ADP_BIT(offs)		(1u << ((offs) & 0x7))
+
 /*
  * Early pre 4.0 Silicon required to delay readout by at least 25ms,
  * since the Event Counter Register updated 25ms after the interrupt
@@ -67,6 +72,16 @@ struct adp5588_kpad {
 	struct delayed_work work;
 	unsigned long delay;
 	unsigned short keycode[ADP5588_KEYMAPSIZE];
+	const struct adp5588_gpi_map *gpimap;
+	unsigned short gpimapsize;
+#ifdef CONFIG_GPIOLIB
+	unsigned char gpiomap[MAXGPIO];
+	bool export_gpio;
+	struct gpio_chip gc;
+	struct mutex gpio_lock;	/* Protect cached dir, dat_out */
+	u8 dat_out[3];
+	u8 dir[3];
+#endif
 };
 
 static int adp5588_read(struct i2c_client *client, u8 reg)
@@ -84,12 +99,222 @@ static int adp5588_write(struct i2c_client *client, u8 reg, u8 val)
 	return i2c_smbus_write_byte_data(client, reg, val);
 }
 
+#ifdef CONFIG_GPIOLIB
+static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off)
+{
+	struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+	return !!(adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank) & bit);
+}
+
+static void adp5588_gpio_set_value(struct gpio_chip *chip,
+				   unsigned off, int val)
+{
+	struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+	mutex_lock(&kpad->gpio_lock);
+
+	if (val)
+		kpad->dat_out[bank] |= bit;
+	else
+		kpad->dat_out[bank] &= ~bit;
+
+	adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
+			   kpad->dat_out[bank]);
+
+	mutex_unlock(&kpad->gpio_lock);
+}
+
+static int adp5588_gpio_direction_input(struct gpio_chip *chip, unsigned off)
+{
+	struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+	int ret;
+
+	mutex_lock(&kpad->gpio_lock);
+
+	kpad->dir[bank] &= ~bit;
+	ret = adp5588_write(kpad->client, GPIO_DIR1 + bank, kpad->dir[bank]);
+
+	mutex_unlock(&kpad->gpio_lock);
+
+	return ret;
+}
+
+static int adp5588_gpio_direction_output(struct gpio_chip *chip,
+					 unsigned off, int val)
+{
+	struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
+	unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+	unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+	int ret;
+
+	mutex_lock(&kpad->gpio_lock);
+
+	kpad->dir[bank] |= bit;
+
+	if (val)
+		kpad->dat_out[bank] |= bit;
+	else
+		kpad->dat_out[bank] &= ~bit;
+
+	ret = adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
+				 kpad->dat_out[bank]);
+	ret |= adp5588_write(kpad->client, GPIO_DIR1 + bank,
+				 kpad->dir[bank]);
+
+	mutex_unlock(&kpad->gpio_lock);
+
+	return ret;
+}
+
+static int __devinit adp5588_build_gpiomap(struct adp5588_kpad *kpad,
+				const struct adp5588_kpad_platform_data *pdata)
+{
+	bool pin_used[MAXGPIO];
+	int n_unused = 0;
+	int i;
+
+	memset(pin_used, 0, sizeof(pin_used));
+
+	for (i = 0; i < pdata->rows; i++)
+		pin_used[i] = true;
+
+	for (i = 0; i < pdata->cols; i++)
+		pin_used[i + GPI_PIN_COL_BASE - GPI_PIN_BASE] = true;
+
+	for (i = 0; i < kpad->gpimapsize; i++)
+		pin_used[kpad->gpimap[i].pin - GPI_PIN_BASE] = true;
+
+	for (i = 0; i < MAXGPIO; i++)
+		if (!pin_used[i])
+			kpad->gpiomap[n_unused++] = i;
+
+	return n_unused;
+}
+
+static int __devinit adp5588_gpio_add(struct adp5588_kpad *kpad)
+{
+	struct device *dev = &kpad->client->dev;
+	const struct adp5588_kpad_platform_data *pdata = dev->platform_data;
+	const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
+	int i, error;
+
+	if (!gpio_data)
+		return 0;
+
+	kpad->gc.ngpio = adp5588_build_gpiomap(kpad, pdata);
+	if (kpad->gc.ngpio == 0) {
+		dev_info(dev, "No unused gpios left to export\n");
+		return 0;
+	}
+
+	kpad->export_gpio = true;
+
+	kpad->gc.direction_input = adp5588_gpio_direction_input;
+	kpad->gc.direction_output = adp5588_gpio_direction_output;
+	kpad->gc.get = adp5588_gpio_get_value;
+	kpad->gc.set = adp5588_gpio_set_value;
+	kpad->gc.can_sleep = 1;
+
+	kpad->gc.base = gpio_data->gpio_start;
+	kpad->gc.label = kpad->client->name;
+	kpad->gc.owner = THIS_MODULE;
+
+	mutex_init(&kpad->gpio_lock);
+
+	error = gpiochip_add(&kpad->gc);
+	if (error) {
+		dev_err(dev, "gpiochip_add failed, err: %d\n", error);
+		return error;
+	}
+
+	for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
+		kpad->dat_out[i] = adp5588_read(kpad->client,
+						GPIO_DAT_OUT1 + i);
+		kpad->dir[i] = adp5588_read(kpad->client, GPIO_DIR1 + i);
+	}
+
+	if (gpio_data->setup) {
+		error = gpio_data->setup(kpad->client,
+					 kpad->gc.base, kpad->gc.ngpio,
+					 gpio_data->context);
+		if (error)
+			dev_warn(dev, "setup failed, %d\n", error);
+	}
+
+	return 0;
+}
+
+static void __devexit adp5588_gpio_remove(struct adp5588_kpad *kpad)
+{
+	struct device *dev = &kpad->client->dev;
+	const struct adp5588_kpad_platform_data *pdata = dev->platform_data;
+	const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
+	int error;
+
+	if (!kpad->export_gpio)
+		return;
+
+	if (gpio_data->teardown) {
+		error = gpio_data->teardown(kpad->client,
+					    kpad->gc.base, kpad->gc.ngpio,
+					    gpio_data->context);
+		if (error)
+			dev_warn(dev, "teardown failed %d\n", error);
+	}
+
+	error = gpiochip_remove(&kpad->gc);
+	if (error)
+		dev_warn(dev, "gpiochip_remove failed %d\n", error);
+}
+#else
+static inline int adp5588_gpio_add(struct adp5588_kpad *kpad)
+{
+	return 0;
+}
+
+static inline void adp5588_gpio_remove(struct adp5588_kpad *kpad)
+{
+}
+#endif
+
+static void adp5588_report_events(struct adp5588_kpad *kpad, int ev_cnt)
+{
+	int i, j;
+
+	for (i = 0; i < ev_cnt; i++) {
+		int key = adp5588_read(kpad->client, Key_EVENTA + i);
+		int key_val = key & KEY_EV_MASK;
+
+		if (key_val >= GPI_PIN_BASE && key_val <= GPI_PIN_END) {
+			for (j = 0; j < kpad->gpimapsize; j++) {
+				if (key_val == kpad->gpimap[j].pin) {
+					input_report_switch(kpad->input,
+							kpad->gpimap[j].sw_evt,
+							key & KEY_EV_PRESSED);
+					break;
+				}
+			}
+		} else {
+			input_report_key(kpad->input,
+					 kpad->keycode[key_val - 1],
+					 key & KEY_EV_PRESSED);
+		}
+	}
+}
+
 static void adp5588_work(struct work_struct *work)
 {
 	struct adp5588_kpad *kpad = container_of(work,
 						struct adp5588_kpad, work.work);
 	struct i2c_client *client = kpad->client;
-	int i, key, status, ev_cnt;
+	int status, ev_cnt;
 
 	status = adp5588_read(client, INT_STAT);
 
@@ -99,12 +324,7 @@ static void adp5588_work(struct work_struct *work)
 	if (status & KE_INT) {
 		ev_cnt = adp5588_read(client, KEY_LCK_EC_STAT) & KEC;
 		if (ev_cnt) {
-			for (i = 0; i < ev_cnt; i++) {
-				key = adp5588_read(client, Key_EVENTA + i);
-				input_report_key(kpad->input,
-					kpad->keycode[(key & KEY_EV_MASK) - 1],
-					key & KEY_EV_PRESSED);
-			}
+			adp5588_report_events(kpad, ev_cnt);
 			input_sync(kpad->input);
 		}
 	}
@@ -128,8 +348,10 @@ static irqreturn_t adp5588_irq(int irq, void *handle)
 
 static int __devinit adp5588_setup(struct i2c_client *client)
 {
-	struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
+	const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
+	const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
 	int i, ret;
+	unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
 
 	ret = adp5588_write(client, KP_GPIO1, KP_SEL(pdata->rows));
 	ret |= adp5588_write(client, KP_GPIO2, KP_SEL(pdata->cols) & 0xFF);
@@ -144,6 +366,32 @@ static int __devinit adp5588_setup(struct i2c_client *client)
 	for (i = 0; i < KEYP_MAX_EVENT; i++)
 		ret |= adp5588_read(client, Key_EVENTA);
 
+	for (i = 0; i < pdata->gpimapsize; i++) {
+		unsigned short pin = pdata->gpimap[i].pin;
+
+		if (pin <= GPI_PIN_ROW_END) {
+			evt_mode1 |= (1 << (pin - GPI_PIN_ROW_BASE));
+		} else {
+			evt_mode2 |= ((1 << (pin - GPI_PIN_COL_BASE)) & 0xFF);
+			evt_mode3 |= ((1 << (pin - GPI_PIN_COL_BASE)) >> 8);
+		}
+	}
+
+	if (pdata->gpimapsize) {
+		ret |= adp5588_write(client, GPI_EM1, evt_mode1);
+		ret |= adp5588_write(client, GPI_EM2, evt_mode2);
+		ret |= adp5588_write(client, GPI_EM3, evt_mode3);
+	}
+
+	if (gpio_data) {
+		for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
+			int pull_mask = gpio_data->pullup_dis_mask;
+
+			ret |= adp5588_write(client, GPIO_PULL1 + i,
+				(pull_mask >> (8 * i)) & 0xFF);
+		}
+	}
+
 	ret |= adp5588_write(client, INT_STAT, CMP2_INT | CMP1_INT |
 					OVR_FLOW_INT | K_LCK_INT |
 					GPI_INT | KE_INT); /* Status is W1C */
@@ -158,11 +406,49 @@ static int __devinit adp5588_setup(struct i2c_client *client)
 	return 0;
 }
 
+static void __devinit adp5588_report_switch_state(struct adp5588_kpad *kpad)
+{
+	int gpi_stat1 = adp5588_read(kpad->client, GPIO_DAT_STAT1);
+	int gpi_stat2 = adp5588_read(kpad->client, GPIO_DAT_STAT2);
+	int gpi_stat3 = adp5588_read(kpad->client, GPIO_DAT_STAT3);
+	int gpi_stat_tmp, pin_loc;
+	int i;
+
+	for (i = 0; i < kpad->gpimapsize; i++) {
+		unsigned short pin = kpad->gpimap[i].pin;
+
+		if (pin <= GPI_PIN_ROW_END) {
+			gpi_stat_tmp = gpi_stat1;
+			pin_loc = pin - GPI_PIN_ROW_BASE;
+		} else if ((pin - GPI_PIN_COL_BASE) < 8) {
+			gpi_stat_tmp = gpi_stat2;
+			pin_loc = pin - GPI_PIN_COL_BASE;
+		} else {
+			gpi_stat_tmp = gpi_stat3;
+			pin_loc = pin - GPI_PIN_COL_BASE - 8;
+		}
+
+		if (gpi_stat_tmp < 0) {
+			dev_err(&kpad->client->dev,
+				"Can't read GPIO_DAT_STAT switch %d default to OFF\n",
+				pin);
+			gpi_stat_tmp = 0;
+		}
+
+		input_report_switch(kpad->input,
+				    kpad->gpimap[i].sw_evt,
+				    !(gpi_stat_tmp & (1 << pin_loc)));
+	}
+
+	input_sync(kpad->input);
+}
+
+
 static int __devinit adp5588_probe(struct i2c_client *client,
 					const struct i2c_device_id *id)
 {
 	struct adp5588_kpad *kpad;
-	struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
+	const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
 	struct input_dev *input;
 	unsigned int revid;
 	int ret, i;
@@ -189,6 +475,37 @@ static int __devinit adp5588_probe(struct i2c_client *client,
 		return -EINVAL;
 	}
 
+	if (!pdata->gpimap && pdata->gpimapsize) {
+		dev_err(&client->dev, "invalid gpimap from pdata\n");
+		return -EINVAL;
+	}
+
+	if (pdata->gpimapsize > ADP5588_GPIMAPSIZE_MAX) {
+		dev_err(&client->dev, "invalid gpimapsize\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < pdata->gpimapsize; i++) {
+		unsigned short pin = pdata->gpimap[i].pin;
+
+		if (pin < GPI_PIN_BASE || pin > GPI_PIN_END) {
+			dev_err(&client->dev, "invalid gpi pin data\n");
+			return -EINVAL;
+		}
+
+		if (pin <= GPI_PIN_ROW_END) {
+			if (pin - GPI_PIN_ROW_BASE + 1 <= pdata->rows) {
+				dev_err(&client->dev, "invalid gpi row data\n");
+				return -EINVAL;
+			}
+		} else {
+			if (pin - GPI_PIN_COL_BASE + 1 <= pdata->cols) {
+				dev_err(&client->dev, "invalid gpi col data\n");
+				return -EINVAL;
+			}
+		}
+	}
+
 	if (!client->irq) {
 		dev_err(&client->dev, "no IRQ?\n");
 		return -EINVAL;
@@ -233,6 +550,9 @@ static int __devinit adp5588_probe(struct i2c_client *client,
 	memcpy(kpad->keycode, pdata->keymap,
 		pdata->keymapsize * input->keycodesize);
 
+	kpad->gpimap = pdata->gpimap;
+	kpad->gpimapsize = pdata->gpimapsize;
+
 	/* setup input device */
 	__set_bit(EV_KEY, input->evbit);
 
@@ -243,6 +563,11 @@ static int __devinit adp5588_probe(struct i2c_client *client,
 		__set_bit(kpad->keycode[i] & KEY_MAX, input->keybit);
 	__clear_bit(KEY_RESERVED, input->keybit);
 
+	if (kpad->gpimapsize)
+		__set_bit(EV_SW, input->evbit);
+	for (i = 0; i < kpad->gpimapsize; i++)
+		__set_bit(kpad->gpimap[i].sw_evt, input->swbit);
+
 	error = input_register_device(input);
 	if (error) {
 		dev_err(&client->dev, "unable to register input device\n");
@@ -261,6 +586,13 @@ static int __devinit adp5588_probe(struct i2c_client *client,
 	if (error)
 		goto err_free_irq;
 
+	if (kpad->gpimapsize)
+		adp5588_report_switch_state(kpad);
+
+	error = adp5588_gpio_add(kpad);
+	if (error)
+		goto err_free_irq;
+
 	device_init_wakeup(&client->dev, 1);
 	i2c_set_clientdata(client, kpad);
 
@@ -287,6 +619,7 @@ static int __devexit adp5588_remove(struct i2c_client *client)
 	free_irq(client->irq, kpad);
 	cancel_delayed_work_sync(&kpad->work);
 	input_unregister_device(kpad->input);
+	adp5588_gpio_remove(kpad);
 	kfree(kpad);
 
 	return 0;