1 files changed, 147 insertions, 59 deletions

diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 3cd57fc56ade..9286a5f40f55 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -20,6 +20,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/clk.h>
 #include <linux/gpio/consumer.h>
+#include <linux/gpio/machine.h>
 #include <linux/tty.h>
 #include <linux/interrupt.h>
 #include <linux/dmi.h>
@@ -51,10 +52,17 @@
 /**
  * struct bcm_device_data - device specific data
  * @no_early_set_baudrate: Disallow set baudrate before driver setup()
+ * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
+ * @no_uart_clock_set: UART clock set command for >3Mbps mode is unavailable
+ * @max_autobaud_speed: max baudrate supported by device in autobaud mode
+ * @max_speed: max baudrate supported
  */
 struct bcm_device_data {
 	bool	no_early_set_baudrate;
 	bool	drive_rts_on_open;
+	bool	no_uart_clock_set;
+	u32	max_autobaud_speed;
+	u32	max_speed;
 };
 
 /**
@@ -77,6 +85,8 @@ struct bcm_device_data {
  * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
  * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
  * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
+ * @gpio_count: internal counter for GPIO resources associated with ACPI device
+ * @gpio_int_idx: index in _CRS for GpioInt() resource
  * @txco_clk: external reference frequency clock used by Bluetooth device
  * @lpo_clk: external LPO clock used by Bluetooth device
  * @supplies: VBAT and VDDIO supplies used by Bluetooth device
@@ -88,10 +98,16 @@ struct bcm_device_data {
  *	set to 0 if @init_speed is already the preferred baudrate
  * @irq: interrupt triggered by HOST_WAKE_BT pin
  * @irq_active_low: whether @irq is active low
+ * @irq_acquired: flag to show if IRQ handler has been assigned
  * @hu: pointer to HCI UART controller struct,
  *	used to disable flow control during runtime suspend and system sleep
  * @is_suspended: whether flow control is currently disabled
  * @no_early_set_baudrate: don't set_baudrate before setup()
+ * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
+ * @no_uart_clock_set: UART clock set command for >3Mbps mode is unavailable
+ * @pcm_int_params: keep the initial PCM configuration
+ * @use_autobaud_mode: start Bluetooth device in autobaud mode
+ * @max_autobaud_speed: max baudrate supported by device in autobaud mode
  */
 struct bcm_device {
 	/* Must be the first member, hci_serdev.c expects this. */
@@ -129,7 +145,10 @@ struct bcm_device {
 #endif
 	bool			no_early_set_baudrate;
 	bool			drive_rts_on_open;
+	bool			no_uart_clock_set;
+	bool			use_autobaud_mode;
 	u8			pcm_int_params[5];
+	u32			max_autobaud_speed;
 };
 
 /* generic bcm uart resources */
@@ -159,10 +178,11 @@ static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
 {
 	struct hci_dev *hdev = hu->hdev;
+	struct bcm_data *bcm = hu->priv;
 	struct sk_buff *skb;
 	struct bcm_update_uart_baud_rate param;
 
-	if (speed > 3000000) {
+	if (speed > 3000000 && !bcm->dev->no_uart_clock_set) {
 		struct bcm_write_uart_clock_setting clock;
 
 		clock.type = BCM_UART_CLOCK_48MHZ;
@@ -306,7 +326,6 @@ static irqreturn_t bcm_host_wake(int irq, void *data)
 	bt_dev_dbg(bdev, "Host wake IRQ");
 
 	pm_runtime_get(bdev->dev);
-	pm_runtime_mark_last_busy(bdev->dev);
 	pm_runtime_put_autosuspend(bdev->dev);
 
 	return IRQ_HANDLED;
@@ -465,15 +484,20 @@ static int bcm_open(struct hci_uart *hu)
 
 out:
 	if (bcm->dev) {
-		if (bcm->dev->drive_rts_on_open)
+		if (bcm->dev->use_autobaud_mode)
+			hci_uart_set_flow_control(hu, false);	/* Assert BT_UART_CTS_N */
+		else if (bcm->dev->drive_rts_on_open)
 			hci_uart_set_flow_control(hu, true);
 
-		hu->init_speed = bcm->dev->init_speed;
+		if (bcm->dev->use_autobaud_mode && bcm->dev->max_autobaud_speed)
+			hu->init_speed = min(bcm->dev->oper_speed, bcm->dev->max_autobaud_speed);
+		else
+			hu->init_speed = bcm->dev->init_speed;
 
 		/* If oper_speed is set, ldisc/serdev will set the baudrate
 		 * before calling setup()
 		 */
-		if (!bcm->dev->no_early_set_baudrate)
+		if (!bcm->dev->no_early_set_baudrate && !bcm->dev->use_autobaud_mode)
 			hu->oper_speed = bcm->dev->oper_speed;
 
 		err = bcm_gpio_set_power(bcm->dev, true);
@@ -557,6 +581,7 @@ static int bcm_setup(struct hci_uart *hu)
 {
 	struct bcm_data *bcm = hu->priv;
 	bool fw_load_done = false;
+	bool use_autobaud_mode = (bcm->dev ? bcm->dev->use_autobaud_mode : 0);
 	unsigned int speed;
 	int err;
 
@@ -565,7 +590,7 @@ static int bcm_setup(struct hci_uart *hu)
 	hu->hdev->set_diag = bcm_set_diag;
 	hu->hdev->set_bdaddr = btbcm_set_bdaddr;
 
-	err = btbcm_initialize(hu->hdev, &fw_load_done);
+	err = btbcm_initialize(hu->hdev, &fw_load_done, use_autobaud_mode);
 	if (err)
 		return err;
 
@@ -573,8 +598,8 @@ static int bcm_setup(struct hci_uart *hu)
 		return 0;
 
 	/* Init speed if any */
-	if (hu->init_speed)
-		speed = hu->init_speed;
+	if (bcm->dev && bcm->dev->init_speed)
+		speed = bcm->dev->init_speed;
 	else if (hu->proto->init_speed)
 		speed = hu->proto->init_speed;
 	else
@@ -609,7 +634,7 @@ static int bcm_setup(struct hci_uart *hu)
 		btbcm_write_pcm_int_params(hu->hdev, &params);
 	}
 
-	err = btbcm_finalize(hu->hdev, &fw_load_done);
+	err = btbcm_finalize(hu->hdev, &fw_load_done, use_autobaud_mode);
 	if (err)
 		return err;
 
@@ -617,7 +642,8 @@ static int bcm_setup(struct hci_uart *hu)
 	 * Allow the bootloader to set a valid address through the
 	 * device tree.
 	 */
-	set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks);
+	if (hci_test_quirk(hu->hdev, HCI_QUIRK_INVALID_BDADDR))
+		hci_set_quirk(hu->hdev, HCI_QUIRK_USE_BDADDR_PROPERTY);
 
 	if (!bcm_request_irq(bcm))
 		err = bcm_setup_sleep(hu);
@@ -671,7 +697,7 @@ static int bcm_recv(struct hci_uart *hu, const void *data, int count)
 	if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
 		return -EUNATCH;
 
-	bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
+	bcm->rx_skb = h4_recv_buf(hu, bcm->rx_skb, data, count,
 				  bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
 	if (IS_ERR(bcm->rx_skb)) {
 		int err = PTR_ERR(bcm->rx_skb);
@@ -683,7 +709,6 @@ static int bcm_recv(struct hci_uart *hu, const void *data, int count)
 		mutex_lock(&bcm_device_lock);
 		if (bcm->dev && bcm_device_exists(bcm->dev)) {
 			pm_runtime_get(bcm->dev->dev);
-			pm_runtime_mark_last_busy(bcm->dev->dev);
 			pm_runtime_put_autosuspend(bcm->dev->dev);
 		}
 		mutex_unlock(&bcm_device_lock);
@@ -721,10 +746,8 @@ static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
 
 	skb = skb_dequeue(&bcm->txq);
 
-	if (bdev) {
-		pm_runtime_mark_last_busy(bdev->dev);
+	if (bdev)
 		pm_runtime_put_autosuspend(bdev->dev);
-	}
 
 	mutex_unlock(&bcm_device_lock);
 
@@ -864,8 +887,43 @@ unlock:
 #endif
 
 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
+static struct gpiod_lookup_table irq_on_int33fc02_pin17_gpios = {
+	.dev_id = "serial0-0",
+	.table = {
+		GPIO_LOOKUP("INT33FC:02", 17, "host-wakeup-alt", GPIO_ACTIVE_HIGH),
+		{ }
+	},
+};
+
 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
 	{
+		.ident = "Acer Iconia One 7 B1-750",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2"),
+		},
+		.driver_data = &irq_on_int33fc02_pin17_gpios,
+	},
+	{
+		.ident = "Asus TF103C",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
+		},
+		.driver_data = &irq_on_int33fc02_pin17_gpios,
+	},
+	{
+		.ident = "Lenovo Yoga Tablet 2 830F/L / 1050F/L",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"),
+			DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
+			/* Partial match on beginning of BIOS version */
+			DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"),
+		},
+		.driver_data = &irq_on_int33fc02_pin17_gpios,
+	},
+	{
 		.ident = "Meegopad T08",
 		.matches = {
 			DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
@@ -1006,22 +1064,23 @@ static struct clk *bcm_get_txco(struct device *dev)
 	struct clk *clk;
 
 	/* New explicit name */
-	clk = devm_clk_get(dev, "txco");
-	if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
+	clk = devm_clk_get_optional(dev, "txco");
+	if (clk)
 		return clk;
 
 	/* Deprecated name */
-	clk = devm_clk_get(dev, "extclk");
-	if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
+	clk = devm_clk_get_optional(dev, "extclk");
+	if (clk)
 		return clk;
 
 	/* Original code used no name at all */
-	return devm_clk_get(dev, NULL);
+	return devm_clk_get_optional(dev, NULL);
 }
 
 static int bcm_get_resources(struct bcm_device *dev)
 {
-	const struct dmi_system_id *dmi_id;
+	const struct dmi_system_id *broken_irq_dmi_id;
+	const char *irq_con_id = "host-wakeup";
 	int err;
 
 	dev->name = dev_name(dev->dev);
@@ -1030,21 +1089,12 @@ static int bcm_get_resources(struct bcm_device *dev)
 		return 0;
 
 	dev->txco_clk = bcm_get_txco(dev->dev);
-
-	/* Handle deferred probing */
-	if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
-		return PTR_ERR(dev->txco_clk);
-
-	/* Ignore all other errors as before */
 	if (IS_ERR(dev->txco_clk))
-		dev->txco_clk = NULL;
-
-	dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
-	if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
-		return PTR_ERR(dev->lpo_clk);
+		return PTR_ERR(dev->txco_clk);
 
+	dev->lpo_clk = devm_clk_get_optional(dev->dev, "lpo");
 	if (IS_ERR(dev->lpo_clk))
-		dev->lpo_clk = NULL;
+		return PTR_ERR(dev->lpo_clk);
 
 	/* Check if we accidentally fetched the lpo clock twice */
 	if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
@@ -1077,23 +1127,33 @@ static int bcm_get_resources(struct bcm_device *dev)
 	if (err)
 		return err;
 
+	broken_irq_dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
+	if (broken_irq_dmi_id && broken_irq_dmi_id->driver_data) {
+		gpiod_add_lookup_table(broken_irq_dmi_id->driver_data);
+		irq_con_id = "host-wakeup-alt";
+		dev->irq_active_low = false;
+		dev->irq = 0;
+	}
+
 	/* IRQ can be declared in ACPI table as Interrupt or GpioInt */
 	if (dev->irq <= 0) {
 		struct gpio_desc *gpio;
 
-		gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
-					       GPIOD_IN);
+		gpio = devm_gpiod_get_optional(dev->dev, irq_con_id, GPIOD_IN);
 		if (IS_ERR(gpio))
 			return PTR_ERR(gpio);
 
 		dev->irq = gpiod_to_irq(gpio);
 	}
 
-	dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
-	if (dmi_id) {
-		dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
-			 dmi_id->ident);
-		dev->irq = 0;
+	if (broken_irq_dmi_id) {
+		if (broken_irq_dmi_id->driver_data) {
+			gpiod_remove_lookup_table(broken_irq_dmi_id->driver_data);
+		} else {
+			dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
+				 broken_irq_dmi_id->ident);
+			dev->irq = 0;
+		}
 	}
 
 	dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
@@ -1163,6 +1223,8 @@ static int bcm_acpi_probe(struct bcm_device *dev)
 
 static int bcm_of_probe(struct bcm_device *bdev)
 {
+	bdev->use_autobaud_mode = device_property_read_bool(bdev->dev,
+							    "brcm,requires-autobaud-mode");
 	device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
 	device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
 				      bdev->pcm_int_params, 5);
@@ -1182,7 +1244,12 @@ static int bcm_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	dev->dev = &pdev->dev;
-	dev->irq = platform_get_irq(pdev, 0);
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
+
+	dev->irq = ret;
 
 	/* Initialize routing field to an unused value */
 	dev->pcm_int_params[0] = 0xff;
@@ -1213,7 +1280,7 @@ static int bcm_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int bcm_remove(struct platform_device *pdev)
+static void bcm_remove(struct platform_device *pdev)
 {
 	struct bcm_device *dev = platform_get_drvdata(pdev);
 
@@ -1222,8 +1289,6 @@ static int bcm_remove(struct platform_device *pdev)
 	mutex_unlock(&bcm_device_lock);
 
 	dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
-
-	return 0;
 }
 
 static const struct hci_uart_proto bcm_proto = {
@@ -1242,6 +1307,12 @@ static const struct hci_uart_proto bcm_proto = {
 };
 
 #ifdef CONFIG_ACPI
+
+/* bcm43430a0/a1 BT does not support 48MHz UART clock, limit to 2000000 baud */
+static struct bcm_device_data bcm43430_device_data = {
+	.max_speed = 2000000,
+};
+
 static const struct acpi_device_id bcm_acpi_match[] = {
 	{ "BCM2E00" },
 	{ "BCM2E01" },
@@ -1356,19 +1427,19 @@ static const struct acpi_device_id bcm_acpi_match[] = {
 	{ "BCM2E71" },
 	{ "BCM2E72" },
 	{ "BCM2E73" },
-	{ "BCM2E74" },
-	{ "BCM2E75" },
+	{ "BCM2E74", (long)&bcm43430_device_data },
+	{ "BCM2E75", (long)&bcm43430_device_data },
 	{ "BCM2E76" },
 	{ "BCM2E77" },
 	{ "BCM2E78" },
 	{ "BCM2E79" },
 	{ "BCM2E7A" },
-	{ "BCM2E7B" },
+	{ "BCM2E7B", (long)&bcm43430_device_data },
 	{ "BCM2E7C" },
 	{ "BCM2E7D" },
 	{ "BCM2E7E" },
 	{ "BCM2E7F" },
-	{ "BCM2E80" },
+	{ "BCM2E80", (long)&bcm43430_device_data },
 	{ "BCM2E81" },
 	{ "BCM2E82" },
 	{ "BCM2E83" },
@@ -1377,7 +1448,7 @@ static const struct acpi_device_id bcm_acpi_match[] = {
 	{ "BCM2E86" },
 	{ "BCM2E87" },
 	{ "BCM2E88" },
-	{ "BCM2E89" },
+	{ "BCM2E89", (long)&bcm43430_device_data },
 	{ "BCM2E8A" },
 	{ "BCM2E8B" },
 	{ "BCM2E8C" },
@@ -1386,29 +1457,30 @@ static const struct acpi_device_id bcm_acpi_match[] = {
 	{ "BCM2E90" },
 	{ "BCM2E92" },
 	{ "BCM2E93" },
-	{ "BCM2E94" },
+	{ "BCM2E94", (long)&bcm43430_device_data },
 	{ "BCM2E95" },
 	{ "BCM2E96" },
 	{ "BCM2E97" },
 	{ "BCM2E98" },
-	{ "BCM2E99" },
+	{ "BCM2E99", (long)&bcm43430_device_data },
 	{ "BCM2E9A" },
-	{ "BCM2E9B" },
+	{ "BCM2E9B", (long)&bcm43430_device_data },
 	{ "BCM2E9C" },
 	{ "BCM2E9D" },
+	{ "BCM2E9F", (long)&bcm43430_device_data },
 	{ "BCM2EA0" },
 	{ "BCM2EA1" },
-	{ "BCM2EA2" },
-	{ "BCM2EA3" },
-	{ "BCM2EA4" },
+	{ "BCM2EA2", (long)&bcm43430_device_data },
+	{ "BCM2EA3", (long)&bcm43430_device_data },
+	{ "BCM2EA4", (long)&bcm43430_device_data }, /* bcm43455 */
 	{ "BCM2EA5" },
 	{ "BCM2EA6" },
 	{ "BCM2EA7" },
 	{ "BCM2EA8" },
 	{ "BCM2EA9" },
-	{ "BCM2EAA" },
-	{ "BCM2EAB" },
-	{ "BCM2EAC" },
+	{ "BCM2EAA", (long)&bcm43430_device_data },
+	{ "BCM2EAB", (long)&bcm43430_device_data },
+	{ "BCM2EAC", (long)&bcm43430_device_data },
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
@@ -1473,8 +1545,12 @@ static int bcm_serdev_probe(struct serdev_device *serdev)
 
 	data = device_get_match_data(bcmdev->dev);
 	if (data) {
+		bcmdev->max_autobaud_speed = data->max_autobaud_speed;
 		bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
 		bcmdev->drive_rts_on_open = data->drive_rts_on_open;
+		bcmdev->no_uart_clock_set = data->no_uart_clock_set;
+		if (data->max_speed && bcmdev->oper_speed > data->max_speed)
+			bcmdev->oper_speed = data->max_speed;
 	}
 
 	return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
@@ -1496,16 +1572,28 @@ static struct bcm_device_data bcm43438_device_data = {
 	.drive_rts_on_open = true,
 };
 
+static struct bcm_device_data cyw4373a0_device_data = {
+	.no_uart_clock_set = true,
+};
+
+static struct bcm_device_data cyw55572_device_data = {
+	.max_autobaud_speed = 921600,
+};
+
 static const struct of_device_id bcm_bluetooth_of_match[] = {
 	{ .compatible = "brcm,bcm20702a1" },
 	{ .compatible = "brcm,bcm4329-bt" },
 	{ .compatible = "brcm,bcm4330-bt" },
 	{ .compatible = "brcm,bcm4334-bt" },
 	{ .compatible = "brcm,bcm4345c5" },
-	{ .compatible = "brcm,bcm4330-bt" },
+	{ .compatible = "brcm,bcm43430a0-bt" },
+	{ .compatible = "brcm,bcm43430a1-bt" },
 	{ .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
+	{ .compatible = "brcm,bcm4349-bt", .data = &bcm43438_device_data },
 	{ .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
 	{ .compatible = "brcm,bcm4335a0" },
+	{ .compatible = "cypress,cyw4373a0-bt", .data = &cyw4373a0_device_data },
+	{ .compatible = "infineon,cyw55572-bt", .data = &cyw55572_device_data },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);