dm: cros_ec: Convert cros_ec keyboard driver to driver model

Adjust the cros_ec keyboard driver to support driver model. Make this the
default for all Exynos boards so that those that use a keyboard will build
correctly with this driver.

Signed-off-by: Simon Glass <sjg@chromium.org>

README

@@ -1785,11 +1785,6 @@ CBFS (Coreboot Filesystem) support
 		Export function i8042_kbd_init, i8042_tstc and i8042_getc
 		for cfb_console. Supports cursor blinking.
 
-		CONFIG_CROS_EC_KEYB
-		Enables a Chrome OS keyboard using the CROS_EC interface.
-		This uses CROS_EC to communicate with a second microcontroller
-		which provides key scans on request.
-
 - Video support:
 		CONFIG_VIDEO
 

arch/arm/Kconfig

@@ -419,6 +419,7 @@ config ARCH_EXYNOS
 	select DM_SERIAL
 	select DM_SPI
 	select DM_GPIO
+	select DM_KEYBOARD
 
 config ARCH_S5PC1XX
 	bool "Samsung S5PC1XX"

arch/sandbox/Kconfig

@@ -17,4 +17,7 @@ config PCI
 	  used on some devices to allow the CPU to communicate with its
 	  peripherals.
 
+config DM_KEYBOARD
+	default y
+
 endmenu

drivers/input/cros_ec_keyb.c

@@ -8,9 +8,11 @@
 
 #include <common.h>
 #include <cros_ec.h>
+#include <dm.h>
 #include <errno.h>
 #include <fdtdec.h>
 #include <input.h>
+#include <keyboard.h>
 #include <key_matrix.h>
 #include <stdio_dev.h>
 
@@ -22,31 +24,29 @@ enum {
 	KBC_REPEAT_DELAY_MS	= 240,
 };
 
-static struct keyb {
-	struct cros_ec_dev *dev;		/* The CROS_EC device */
-	struct input_config input;	/* The input layer */
+struct cros_ec_keyb_priv {
+	struct input_config *input;	/* The input layer */
 	struct key_matrix matrix;	/* The key matrix layer */
 	int key_rows;			/* Number of keyboard rows */
 	int key_cols;			/* Number of keyboard columns */
 	int ghost_filter;		/* 1 to enable ghost filter, else 0 */
-	int inited;			/* 1 if keyboard is ready */
-} config;
+};
 
 
 /**
  * Check the keyboard controller and return a list of key matrix positions
  * for which a key is pressed
  *
- * @param config	Keyboard config
+ * @param dev		Keyboard device
  * @param keys		List of keys that we have detected
  * @param max_count	Maximum number of keys to return
  * @param samep		Set to true if this scan repeats the last, else false
  * @return number of pressed keys, 0 for none, -EIO on error
  */
-static int check_for_keys(struct keyb *config,
-			   struct key_matrix_key *keys, int max_count,
-			   bool *samep)
+static int check_for_keys(struct udevice *dev, struct key_matrix_key *keys,
+			  int max_count, bool *samep)
 {
+	struct cros_ec_keyb_priv *priv = dev_get_priv(dev);
 	struct key_matrix_key *key;
 	static struct mbkp_keyscan last_scan;
 	static bool last_scan_valid;
@@ -54,7 +54,7 @@ static int check_for_keys(struct keyb *config,
 	unsigned int row, col, bit, data;
 	int num_keys;
 
-	if (cros_ec_scan_keyboard(config->dev->dev, &scan)) {
+	if (cros_ec_scan_keyboard(dev->parent, &scan)) {
 		debug("%s: keyboard scan failed\n", __func__);
 		return -EIO;
 	}
@@ -69,9 +69,9 @@ static int check_for_keys(struct keyb *config,
 	last_scan_valid = true;
 	memcpy(&last_scan, &scan, sizeof(last_scan));
 
-	for (col = num_keys = bit = 0; col < config->matrix.num_cols;
+	for (col = num_keys = bit = 0; col < priv->matrix.num_cols;
 			col++) {
-		for (row = 0; row < config->matrix.num_rows; row++) {
+		for (row = 0; row < priv->matrix.num_rows; row++) {
 			unsigned int mask = 1 << (bit & 7);
 
 			data = scan.data[bit / 8];
@@ -88,28 +88,6 @@ static int check_for_keys(struct keyb *config,
 	return num_keys;
 }
 
-/**
- * Test if keys are available to be read
- *
- * @return 0 if no keys available, 1 if keys are available
- */
-static int kbd_tstc(struct stdio_dev *dev)
-{
-	/* Just get input to do this for us */
-	return config.inited ? input_tstc(&config.input) : 0;
-}
-
-/**
- * Read a key
- *
- * @return ASCII key code, or 0 if no key, or -1 if error
- */
-static int kbd_getc(struct stdio_dev *dev)
-{
-	/* Just get input to do this for us */
-	return config.inited ? input_getc(&config.input) : 0;
-}
-
 /**
  * Check the keyboard, and send any keys that are pressed.
  *
@@ -121,6 +99,8 @@ static int kbd_getc(struct stdio_dev *dev)
  */
 int cros_ec_kbc_check(struct input_config *input)
 {
+	struct udevice *dev = input->dev;
+	struct cros_ec_keyb_priv *priv = dev_get_priv(dev);
 	static struct key_matrix_key last_keys[KBC_MAX_KEYS];
 	static int last_num_keys;
 	struct key_matrix_key keys[KBC_MAX_KEYS];
@@ -139,9 +119,9 @@ int cros_ec_kbc_check(struct input_config *input)
 	 * may return 0 before all keys have been read from the EC.
 	 */
 	do {
-		irq_pending = cros_ec_interrupt_pending(config.dev->dev);
+		irq_pending = cros_ec_interrupt_pending(dev->parent);
 		if (irq_pending) {
-			num_keys = check_for_keys(&config, keys, KBC_MAX_KEYS,
+			num_keys = check_for_keys(dev, keys, KBC_MAX_KEYS,
 						  &same);
 			if (num_keys < 0)
 				return 0;
@@ -158,7 +138,7 @@ int cros_ec_kbc_check(struct input_config *input)
 
 		if (num_keys < 0)
 			return -1;
-		num_keycodes = key_matrix_decode(&config.matrix, keys,
+		num_keycodes = key_matrix_decode(&priv->matrix, keys,
 				num_keys, keycodes, KBC_MAX_KEYS);
 		sent = input_send_keycodes(input, keycodes, num_keycodes);
 
@@ -182,7 +162,7 @@ int cros_ec_kbc_check(struct input_config *input)
  * @return 0 if ok, -1 on error
  */
 static int cros_ec_keyb_decode_fdt(const void *blob, int node,
-				struct keyb *config)
+				struct cros_ec_keyb_priv *config)
 {
 	/*
 	 * Get keyboard rows and columns - at present we are limited to
@@ -202,68 +182,56 @@ static int cros_ec_keyb_decode_fdt(const void *blob, int node,
 	return 0;
 }
 
-/**
- * Set up the keyboard. This is called by the stdio device handler.
- *
- * We want to do this init when the keyboard is actually used rather than
- * at start-up, since keyboard input may not currently be selected.
- *
- * @return 0 if ok, -1 on error
- */
-static int cros_ec_init_keyboard(struct stdio_dev *dev)
+static int cros_ec_kbd_probe(struct udevice *dev)
 {
+	struct cros_ec_keyb_priv *priv = dev_get_priv(dev);
+	struct keyboard_priv *uc_priv = dev_get_uclass_priv(dev);
+	struct stdio_dev *sdev = &uc_priv->sdev;
+	struct input_config *input = &uc_priv->input;
 	const void *blob = gd->fdt_blob;
-	int node;
+	int node = dev->of_offset;
+	int ret;
 
-	config.dev = board_get_cros_ec_dev();
-	if (!config.dev) {
-		debug("%s: no cros_ec device: cannot init keyboard\n",
-		      __func__);
+	if (cros_ec_keyb_decode_fdt(blob, node, priv))
 		return -1;
-	}
-	node = fdtdec_next_compatible(blob, 0, COMPAT_GOOGLE_CROS_EC_KEYB);
-	if (node < 0) {
-		debug("%s: Node not found\n", __func__);
-		return -1;
-	}
-	if (cros_ec_keyb_decode_fdt(blob, node, &config))
-		return -1;
-	input_set_delays(&config.input, KBC_REPEAT_DELAY_MS,
-			 KBC_REPEAT_RATE_MS);
-	if (key_matrix_init(&config.matrix, config.key_rows,
-			config.key_cols, config.ghost_filter)) {
+	input_set_delays(input, KBC_REPEAT_DELAY_MS, KBC_REPEAT_RATE_MS);
+	ret = key_matrix_init(&priv->matrix, priv->key_rows, priv->key_cols,
+			      priv->ghost_filter);
+	if (ret) {
 		debug("%s: cannot init key matrix\n", __func__);
-		return -1;
+		return ret;
 	}
-	if (key_matrix_decode_fdt(&config.matrix, gd->fdt_blob, node)) {
+	ret = key_matrix_decode_fdt(&priv->matrix, gd->fdt_blob, node);
+	if (ret) {
 		debug("%s: Could not decode key matrix from fdt\n", __func__);
-		return -1;
+		return ret;
 	}
-	config.inited = 1;
-	debug("%s: Matrix keyboard %dx%d ready\n", __func__, config.key_rows,
-	      config.key_cols);
+	debug("%s: Matrix keyboard %dx%d ready\n", __func__, priv->key_rows,
+	      priv->key_cols);
 
-	return 0;
-}
-
-int drv_keyboard_init(void)
-{
-	struct stdio_dev dev;
-
-	if (input_init(&config.input, 0)) {
-		debug("%s: Cannot set up input\n", __func__);
-		return -1;
-	}
-	config.input.read_keys = cros_ec_kbc_check;
-	input_add_tables(&config.input);
-
-	memset(&dev, '\0', sizeof(dev));
-	strcpy(dev.name, "cros-ec-keyb");
-	dev.flags = DEV_FLAGS_INPUT;
-	dev.getc = kbd_getc;
-	dev.tstc = kbd_tstc;
-	dev.start = cros_ec_init_keyboard;
+	priv->input = input;
+	input->dev = dev;
+	input_add_tables(input);
+	input->read_keys = cros_ec_kbc_check;
+	strcpy(sdev->name, "cros-ec-keyb");
 
 	/* Register the device. cros_ec_init_keyboard() will be called soon */
-	return input_stdio_register(&dev);
+	return input_stdio_register(sdev);
 }
+
+static const struct keyboard_ops cros_ec_kbd_ops = {
+};
+
+static const struct udevice_id cros_ec_kbd_ids[] = {
+	{ .compatible = "google,cros-ec-keyb" },
+	{ }
+};
+
+U_BOOT_DRIVER(cros_ec_kbd) = {
+	.name	= "cros_ec_kbd",
+	.id	= UCLASS_KEYBOARD,
+	.of_match = cros_ec_kbd_ids,
+	.probe = cros_ec_kbd_probe,
+	.ops	= &cros_ec_kbd_ops,
+	.priv_auto_alloc_size = sizeof(struct cros_ec_keyb_priv),
+};