1 files changed, 168 insertions, 27 deletions

diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c
index 604ab2bba231..73a4a325c867 100644
--- a/drivers/bluetooth/btnxpuart.c
+++ b/drivers/bluetooth/btnxpuart.c
@@ -17,6 +17,9 @@
 #include <linux/crc32.h>
 #include <linux/string_helpers.h>
 #include <linux/gpio/consumer.h>
+#include <linux/of_irq.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -72,7 +75,8 @@
 #define FW_AUTH_ENC		0xc0
 
 #define HCI_NXP_PRI_BAUDRATE	115200
-#define HCI_NXP_SEC_BAUDRATE	3000000
+#define HCI_NXP_SEC_BAUDRATE_3M	3000000
+#define HCI_NXP_SEC_BAUDRATE_4M	4000000
 
 #define MAX_FW_FILE_NAME_LEN    50
 
@@ -143,7 +147,9 @@ struct ps_data {
 	bool  driver_sent_cmd;
 	u16   h2c_ps_interval;
 	u16   c2h_ps_interval;
+	bool  wakeup_source;
 	struct gpio_desc *h2c_ps_gpio;
+	s32 irq_handler;
 	struct hci_dev *hdev;
 	struct work_struct work;
 	struct timer_list ps_timer;
@@ -198,12 +204,14 @@ struct btnxpuart_dev {
 	u32 new_baudrate;
 	u32 current_baudrate;
 	u32 fw_init_baudrate;
+	u32 secondary_baudrate;
 	enum bootloader_param_change timeout_changed;
 	enum bootloader_param_change baudrate_changed;
 	bool helper_downloaded;
 
 	struct ps_data psdata;
 	struct btnxpuart_data *nxp_data;
+	struct reset_control *pdn;
 };
 
 #define NXP_V1_FW_REQ_PKT	0xa5
@@ -362,17 +370,26 @@ static u8 crc8_table[CRC8_TABLE_SIZE];
 
 static struct sk_buff *nxp_drv_send_cmd(struct hci_dev *hdev, u16 opcode,
 					u32 plen,
-					void *param)
+					void *param,
+					bool resp)
 {
 	struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
 	struct ps_data *psdata = &nxpdev->psdata;
-	struct sk_buff *skb;
+	struct sk_buff *skb = NULL;
 
 	/* set flag to prevent nxp_enqueue from parsing values from this command and
 	 * calling hci_cmd_sync_queue() again.
 	 */
 	psdata->driver_sent_cmd = true;
-	skb = __hci_cmd_sync(hdev, opcode, plen, param, HCI_CMD_TIMEOUT);
+	if (resp) {
+		skb = __hci_cmd_sync(hdev, opcode, plen, param, HCI_CMD_TIMEOUT);
+	} else {
+		__hci_cmd_send(hdev, opcode, plen, param);
+		/* Allow command to be sent before tx_work is cancelled
+		 * by btnxpuart_flush()
+		 */
+		msleep(20);
+	}
 	psdata->driver_sent_cmd = false;
 
 	return skb;
@@ -464,7 +481,7 @@ static void ps_work_func(struct work_struct *work)
 
 static void ps_timeout_func(struct timer_list *t)
 {
-	struct ps_data *data = from_timer(data, t, ps_timer);
+	struct ps_data *data = timer_container_of(data, t, ps_timer);
 	struct hci_dev *hdev = data->hdev;
 	struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
 
@@ -476,12 +493,21 @@ static void ps_timeout_func(struct timer_list *t)
 	}
 }
 
+static irqreturn_t ps_host_wakeup_irq_handler(int irq, void *priv)
+{
+	struct btnxpuart_dev *nxpdev = (struct btnxpuart_dev *)priv;
+
+	bt_dev_dbg(nxpdev->hdev, "Host wakeup interrupt");
+	return IRQ_HANDLED;
+}
 static int ps_setup(struct hci_dev *hdev)
 {
 	struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
 	struct serdev_device *serdev = nxpdev->serdev;
 	struct ps_data *psdata = &nxpdev->psdata;
+	int ret;
 
+	/* Out-Of-Band Device Wakeup */
 	psdata->h2c_ps_gpio = devm_gpiod_get_optional(&serdev->dev, "device-wakeup",
 						      GPIOD_OUT_LOW);
 	if (IS_ERR(psdata->h2c_ps_gpio)) {
@@ -493,11 +519,39 @@ static int ps_setup(struct hci_dev *hdev)
 	if (device_property_read_u8(&serdev->dev, "nxp,wakein-pin", &psdata->h2c_wakeup_gpio)) {
 		psdata->h2c_wakeup_gpio = 0xff; /* 0xff: use default pin/gpio */
 	} else if (!psdata->h2c_ps_gpio) {
-		bt_dev_warn(hdev, "nxp,wakein-pin property without device-wakeup GPIO");
+		bt_dev_warn(hdev, "nxp,wakein-pin property without device-wakeup-gpios");
 		psdata->h2c_wakeup_gpio = 0xff;
 	}
 
-	device_property_read_u8(&serdev->dev, "nxp,wakeout-pin", &psdata->c2h_wakeup_gpio);
+	/* Out-Of-Band Host Wakeup */
+	if (of_property_read_bool(serdev->dev.of_node, "wakeup-source")) {
+		psdata->irq_handler = of_irq_get_byname(serdev->dev.of_node, "wakeup");
+		bt_dev_info(nxpdev->hdev, "irq_handler: %d", psdata->irq_handler);
+		if (psdata->irq_handler > 0)
+			psdata->wakeup_source = true;
+	}
+
+	if (device_property_read_u8(&serdev->dev, "nxp,wakeout-pin", &psdata->c2h_wakeup_gpio)) {
+		psdata->c2h_wakeup_gpio = 0xff;
+		if (psdata->wakeup_source) {
+			bt_dev_warn(hdev, "host wakeup interrupt without nxp,wakeout-pin");
+			psdata->wakeup_source = false;
+		}
+	} else if (!psdata->wakeup_source) {
+		bt_dev_warn(hdev, "nxp,wakeout-pin property without host wakeup interrupt");
+		psdata->c2h_wakeup_gpio = 0xff;
+	}
+
+	if (psdata->wakeup_source) {
+		ret = devm_request_irq(&serdev->dev, psdata->irq_handler,
+					ps_host_wakeup_irq_handler,
+					IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
+					dev_name(&serdev->dev), nxpdev);
+		if (ret)
+			bt_dev_info(hdev, "error setting wakeup IRQ handler, ignoring\n");
+		disable_irq(psdata->irq_handler);
+		device_init_wakeup(&serdev->dev, true);
+	}
 
 	psdata->hdev = hdev;
 	INIT_WORK(&psdata->work, ps_work_func);
@@ -555,7 +609,8 @@ static int send_ps_cmd(struct hci_dev *hdev, void *data)
 		pcmd.ps_cmd = BT_PS_DISABLE;
 	pcmd.c2h_ps_interval = __cpu_to_le16(psdata->c2h_ps_interval);
 
-	skb = nxp_drv_send_cmd(hdev, HCI_NXP_AUTO_SLEEP_MODE, sizeof(pcmd), &pcmd);
+	skb = nxp_drv_send_cmd(hdev, HCI_NXP_AUTO_SLEEP_MODE, sizeof(pcmd),
+			       &pcmd, true);
 	if (IS_ERR(skb)) {
 		bt_dev_err(hdev, "Setting Power Save mode failed (%ld)", PTR_ERR(skb));
 		return PTR_ERR(skb);
@@ -604,7 +659,8 @@ static int send_wakeup_method_cmd(struct hci_dev *hdev, void *data)
 		break;
 	}
 
-	skb = nxp_drv_send_cmd(hdev, HCI_NXP_WAKEUP_METHOD, sizeof(pcmd), &pcmd);
+	skb = nxp_drv_send_cmd(hdev, HCI_NXP_WAKEUP_METHOD, sizeof(pcmd),
+			       &pcmd, true);
 	if (IS_ERR(skb)) {
 		bt_dev_err(hdev, "Setting wake-up method failed (%ld)", PTR_ERR(skb));
 		return PTR_ERR(skb);
@@ -637,12 +693,10 @@ static void ps_init(struct hci_dev *hdev)
 
 	psdata->ps_state = PS_STATE_AWAKE;
 
-	if (psdata->c2h_wakeup_gpio) {
+	if (psdata->c2h_wakeup_gpio != 0xff)
 		psdata->c2h_wakeupmode = BT_HOST_WAKEUP_METHOD_GPIO;
-	} else {
+	else
 		psdata->c2h_wakeupmode = BT_HOST_WAKEUP_METHOD_NONE;
-		psdata->c2h_wakeup_gpio = 0xff;
-	}
 
 	psdata->cur_h2c_wakeupmode = WAKEUP_METHOD_INVALID;
 	if (psdata->h2c_ps_gpio)
@@ -764,7 +818,10 @@ static bool nxp_fw_change_baudrate(struct hci_dev *hdev, u16 req_len)
 		nxpdev->fw_v3_offset_correction += req_len;
 	} else if (req_len == sizeof(uart_config)) {
 		uart_config.clkdiv.address = __cpu_to_le32(clkdivaddr);
-		uart_config.clkdiv.value = __cpu_to_le32(0x00c00000);
+		if (nxpdev->new_baudrate == HCI_NXP_SEC_BAUDRATE_4M)
+			uart_config.clkdiv.value = __cpu_to_le32(0x01000000);
+		else
+			uart_config.clkdiv.value = __cpu_to_le32(0x00c00000);
 		uart_config.uartdiv.address = __cpu_to_le32(uartdivaddr);
 		uart_config.uartdiv.value = __cpu_to_le32(1);
 		uart_config.mcr.address = __cpu_to_le32(uartmcraddr);
@@ -928,12 +985,13 @@ static int nxp_recv_fw_req_v1(struct hci_dev *hdev, struct sk_buff *skb)
 			goto free_skb;
 		}
 		if (nxpdev->baudrate_changed != changed) {
+			nxpdev->new_baudrate = nxpdev->secondary_baudrate;
 			if (nxp_fw_change_baudrate(hdev, len)) {
 				nxpdev->baudrate_changed = changed;
 				serdev_device_set_baudrate(nxpdev->serdev,
-							   HCI_NXP_SEC_BAUDRATE);
+							   nxpdev->secondary_baudrate);
 				serdev_device_set_flow_control(nxpdev->serdev, true);
-				nxpdev->current_baudrate = HCI_NXP_SEC_BAUDRATE;
+				nxpdev->current_baudrate = nxpdev->secondary_baudrate;
 			}
 			goto free_skb;
 		}
@@ -954,7 +1012,7 @@ static int nxp_recv_fw_req_v1(struct hci_dev *hdev, struct sk_buff *skb)
 			nxpdev->helper_downloaded = true;
 			serdev_device_wait_until_sent(nxpdev->serdev, 0);
 			serdev_device_set_baudrate(nxpdev->serdev,
-						   HCI_NXP_SEC_BAUDRATE);
+						   HCI_NXP_SEC_BAUDRATE_3M);
 			serdev_device_set_flow_control(nxpdev->serdev, true);
 		} else {
 			clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
@@ -1178,12 +1236,13 @@ static int nxp_recv_fw_req_v3(struct hci_dev *hdev, struct sk_buff *skb)
 	}
 
 	if (nxpdev->baudrate_changed != changed) {
+		nxpdev->new_baudrate = nxpdev->secondary_baudrate;
 		if (nxp_fw_change_baudrate(hdev, len)) {
 			nxpdev->baudrate_changed = cmd_sent;
 			serdev_device_set_baudrate(nxpdev->serdev,
-						   HCI_NXP_SEC_BAUDRATE);
+						   nxpdev->secondary_baudrate);
 			serdev_device_set_flow_control(nxpdev->serdev, true);
-			nxpdev->current_baudrate = HCI_NXP_SEC_BAUDRATE;
+			nxpdev->current_baudrate = nxpdev->secondary_baudrate;
 		}
 		goto free_skb;
 	}
@@ -1227,7 +1286,8 @@ static int nxp_set_baudrate_cmd(struct hci_dev *hdev, void *data)
 	if (!psdata)
 		return 0;
 
-	skb = nxp_drv_send_cmd(hdev, HCI_NXP_SET_OPER_SPEED, 4, (u8 *)&new_baudrate);
+	skb = nxp_drv_send_cmd(hdev, HCI_NXP_SET_OPER_SPEED, 4,
+			       (u8 *)&new_baudrate, true);
 	if (IS_ERR(skb)) {
 		bt_dev_err(hdev, "Setting baudrate failed (%ld)", PTR_ERR(skb));
 		return PTR_ERR(skb);
@@ -1285,7 +1345,7 @@ static void nxp_coredump(struct hci_dev *hdev)
 	struct sk_buff *skb;
 	u8 pcmd = 2;
 
-	skb = nxp_drv_send_cmd(hdev, HCI_NXP_TRIGGER_DUMP, 1, &pcmd);
+	skb = nxp_drv_send_cmd(hdev, HCI_NXP_TRIGGER_DUMP, 1, &pcmd, true);
 	if (IS_ERR(skb))
 		bt_dev_err(hdev, "Failed to trigger FW Dump. (%ld)", PTR_ERR(skb));
 	else
@@ -1327,7 +1387,6 @@ static int nxp_process_fw_dump(struct hci_dev *hdev, struct sk_buff *skb)
 
 	if (buf_len == 0) {
 		bt_dev_warn(hdev, "==== FW dump complete ===");
-		clear_bit(BTNXPUART_FW_DUMP_IN_PROGRESS, &nxpdev->tx_state);
 		hci_devcd_complete(hdev);
 		nxp_set_ind_reset(hdev, NULL);
 	}
@@ -1381,6 +1440,10 @@ static int nxp_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 static int nxp_setup(struct hci_dev *hdev)
 {
 	struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
+	struct serdev_device *serdev = nxpdev->serdev;
+	char device_string[30];
+	char event_string[50];
+	char *envp[] = {device_string, event_string, NULL};
 	int err = 0;
 
 	if (nxp_check_boot_sign(nxpdev)) {
@@ -1393,6 +1456,12 @@ static int nxp_setup(struct hci_dev *hdev)
 		clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
 	}
 
+	snprintf(device_string, 30, "BTNXPUART_DEV=%s", dev_name(&serdev->dev));
+	snprintf(event_string, 50, "BTNXPUART_STATE=FW_READY");
+	bt_dev_dbg(hdev, "==== Send uevent: %s:%s ===", device_string,
+		   event_string);
+	kobject_uevent_env(&serdev->dev.kobj, KOBJ_CHANGE, envp);
+
 	serdev_device_set_baudrate(nxpdev->serdev, nxpdev->fw_init_baudrate);
 	nxpdev->current_baudrate = nxpdev->fw_init_baudrate;
 
@@ -1409,8 +1478,8 @@ static int nxp_post_init(struct hci_dev *hdev)
 	struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
 	struct ps_data *psdata = &nxpdev->psdata;
 
-	if (nxpdev->current_baudrate != HCI_NXP_SEC_BAUDRATE) {
-		nxpdev->new_baudrate = HCI_NXP_SEC_BAUDRATE;
+	if (nxpdev->current_baudrate != nxpdev->secondary_baudrate) {
+		nxpdev->new_baudrate = nxpdev->secondary_baudrate;
 		nxp_set_baudrate_cmd(hdev, NULL);
 	}
 	if (psdata->cur_h2c_wakeupmode != psdata->h2c_wakeupmode)
@@ -1441,7 +1510,13 @@ static int nxp_shutdown(struct hci_dev *hdev)
 	u8 pcmd = 0;
 
 	if (ind_reset_in_progress(nxpdev)) {
-		skb = nxp_drv_send_cmd(hdev, HCI_NXP_IND_RESET, 1, &pcmd);
+		if (test_and_clear_bit(BTNXPUART_FW_DUMP_IN_PROGRESS,
+				       &nxpdev->tx_state))
+			skb = nxp_drv_send_cmd(hdev, HCI_NXP_IND_RESET, 1,
+					       &pcmd, false);
+		else
+			skb = nxp_drv_send_cmd(hdev, HCI_NXP_IND_RESET, 1,
+					       &pcmd, true);
 		serdev_device_set_flow_control(nxpdev->serdev, false);
 		set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
 		/* HCI_NXP_IND_RESET command may not returns any response */
@@ -1707,11 +1782,41 @@ static const struct serdev_device_ops btnxpuart_client_ops = {
 	.write_wakeup = btnxpuart_write_wakeup,
 };
 
+static void nxp_coredump_notify(struct hci_dev *hdev, int state)
+{
+	struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
+	struct serdev_device *serdev = nxpdev->serdev;
+	char device_string[30];
+	char event_string[50];
+	char *envp[] = {device_string, event_string, NULL};
+
+	snprintf(device_string, 30, "BTNXPUART_DEV=%s", dev_name(&serdev->dev));
+	switch (state) {
+	case HCI_DEVCOREDUMP_ACTIVE:
+		snprintf(event_string, 50, "BTNXPUART_STATE=FW_DUMP_ACTIVE");
+		break;
+	case HCI_DEVCOREDUMP_DONE:
+		snprintf(event_string, 50, "BTNXPUART_STATE=FW_DUMP_DONE");
+		break;
+	case HCI_DEVCOREDUMP_TIMEOUT:
+		snprintf(event_string, 50, "BTNXPUART_STATE=FW_DUMP_TIMEOUT");
+		break;
+	default:
+		snprintf(event_string, 50, "BTNXPUART_STATE=FW_DUMP_STATE_%d",
+			 state);
+		break;
+	}
+	bt_dev_dbg(hdev, "==== Send uevent: %s:%s ===", device_string,
+		   event_string);
+	kobject_uevent_env(&serdev->dev.kobj, KOBJ_CHANGE, envp);
+}
+
 static int nxp_serdev_probe(struct serdev_device *serdev)
 {
 	struct hci_dev *hdev;
 	struct btnxpuart_dev *nxpdev;
 	bdaddr_t ba = {0};
+	int err;
 
 	nxpdev = devm_kzalloc(&serdev->dev, sizeof(*nxpdev), GFP_KERNEL);
 	if (!nxpdev)
@@ -1735,10 +1840,31 @@ static int nxp_serdev_probe(struct serdev_device *serdev)
 	if (!nxpdev->fw_init_baudrate)
 		nxpdev->fw_init_baudrate = FW_INIT_BAUDRATE;
 
+	device_property_read_u32(&nxpdev->serdev->dev, "max-speed",
+				 &nxpdev->secondary_baudrate);
+	if (!nxpdev->secondary_baudrate ||
+	    (nxpdev->secondary_baudrate != HCI_NXP_SEC_BAUDRATE_3M &&
+	     nxpdev->secondary_baudrate != HCI_NXP_SEC_BAUDRATE_4M)) {
+		if (nxpdev->secondary_baudrate)
+			dev_err(&serdev->dev,
+				"Invalid max-speed. Using default 3000000.");
+		nxpdev->secondary_baudrate = HCI_NXP_SEC_BAUDRATE_3M;
+	}
+
 	set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
 
 	crc8_populate_msb(crc8_table, POLYNOMIAL8);
 
+	nxpdev->pdn = devm_reset_control_get_optional_shared(&serdev->dev, NULL);
+	if (IS_ERR(nxpdev->pdn))
+		return PTR_ERR(nxpdev->pdn);
+
+	err = devm_regulator_get_enable(&serdev->dev, "vcc");
+	if (err) {
+		dev_err(&serdev->dev, "Failed to enable vcc regulator\n");
+		return err;
+	}
+
 	/* Initialize and register HCI device */
 	hdev = hci_alloc_dev();
 	if (!hdev) {
@@ -1746,6 +1872,8 @@ static int nxp_serdev_probe(struct serdev_device *serdev)
 		return -ENOMEM;
 	}
 
+	reset_control_deassert(nxpdev->pdn);
+
 	nxpdev->hdev = hdev;
 
 	hdev->bus = HCI_UART;
@@ -1769,7 +1897,7 @@ static int nxp_serdev_probe(struct serdev_device *serdev)
 				      "local-bd-address",
 				      (u8 *)&ba, sizeof(ba));
 	if (bacmp(&ba, BDADDR_ANY))
-		set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
+		hci_set_quirk(hdev, HCI_QUIRK_USE_BDADDR_PROPERTY);
 
 	if (hci_register_dev(hdev) < 0) {
 		dev_err(&serdev->dev, "Can't register HCI device\n");
@@ -1779,11 +1907,13 @@ static int nxp_serdev_probe(struct serdev_device *serdev)
 	if (ps_setup(hdev))
 		goto probe_fail;
 
-	hci_devcd_register(hdev, nxp_coredump, nxp_coredump_hdr, NULL);
+	hci_devcd_register(hdev, nxp_coredump, nxp_coredump_hdr,
+			   nxp_coredump_notify);
 
 	return 0;
 
 probe_fail:
+	reset_control_assert(nxpdev->pdn);
 	hci_free_dev(hdev);
 	return -ENODEV;
 }
@@ -1811,6 +1941,7 @@ static void nxp_serdev_remove(struct serdev_device *serdev)
 
 	ps_cleanup(nxpdev);
 	hci_unregister_dev(hdev);
+	reset_control_assert(nxpdev->pdn);
 	hci_free_dev(hdev);
 }
 
@@ -1821,6 +1952,11 @@ static int nxp_serdev_suspend(struct device *dev)
 	struct ps_data *psdata = &nxpdev->psdata;
 
 	ps_control(psdata->hdev, PS_STATE_SLEEP);
+
+	if (psdata->wakeup_source) {
+		enable_irq_wake(psdata->irq_handler);
+		enable_irq(psdata->irq_handler);
+	}
 	return 0;
 }
 
@@ -1829,6 +1965,11 @@ static int nxp_serdev_resume(struct device *dev)
 	struct btnxpuart_dev *nxpdev = dev_get_drvdata(dev);
 	struct ps_data *psdata = &nxpdev->psdata;
 
+	if (psdata->wakeup_source) {
+		disable_irq(psdata->irq_handler);
+		disable_irq_wake(psdata->irq_handler);
+	}
+
 	ps_control(psdata->hdev, PS_STATE_AWAKE);
 	return 0;
 }