| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * |
| * Bluetooth HCI UART driver for Broadcom devices |
| * |
| * Copyright (C) 2015 Intel Corporation |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/skbuff.h> |
| #include <linux/firmware.h> |
| #include <linux/module.h> |
| #include <linux/acpi.h> |
| #include <linux/of.h> |
| #include <linux/of_irq.h> |
| #include <linux/property.h> |
| #include <linux/platform_data/x86/apple.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/clk.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/tty.h> |
| #include <linux/interrupt.h> |
| #include <linux/dmi.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/serdev.h> |
| |
| #include <net/bluetooth/bluetooth.h> |
| #include <net/bluetooth/hci_core.h> |
| |
| #include "btbcm.h" |
| #include "hci_uart.h" |
| |
| #define BCM_NULL_PKT 0x00 |
| #define BCM_NULL_SIZE 0 |
| |
| #define BCM_LM_DIAG_PKT 0x07 |
| #define BCM_LM_DIAG_SIZE 63 |
| |
| #define BCM_TYPE49_PKT 0x31 |
| #define BCM_TYPE49_SIZE 0 |
| |
| #define BCM_TYPE52_PKT 0x34 |
| #define BCM_TYPE52_SIZE 0 |
| |
| #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
| |
| #define BCM_NUM_SUPPLIES 2 |
| |
| /** |
| * struct bcm_device_data - device specific data |
| * @no_early_set_baudrate: Disallow set baudrate before driver setup() |
| */ |
| struct bcm_device_data { |
| bool no_early_set_baudrate; |
| bool drive_rts_on_open; |
| }; |
| |
| /** |
| * struct bcm_device - device driver resources |
| * @serdev_hu: HCI UART controller struct |
| * @list: bcm_device_list node |
| * @dev: physical UART slave |
| * @name: device name logged by bt_dev_*() functions |
| * @device_wakeup: BT_WAKE pin, |
| * assert = Bluetooth device must wake up or remain awake, |
| * deassert = Bluetooth device may sleep when sleep criteria are met |
| * @shutdown: BT_REG_ON pin, |
| * power up or power down Bluetooth device internal regulators |
| * @set_device_wakeup: callback to toggle BT_WAKE pin |
| * either by accessing @device_wakeup or by calling @btlp |
| * @set_shutdown: callback to toggle BT_REG_ON pin |
| * either by accessing @shutdown or by calling @btpu/@btpd |
| * @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") |
| * @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 |
| * @res_enabled: whether clocks and supplies are prepared and enabled |
| * @init_speed: default baudrate of Bluetooth device; |
| * the host UART is initially set to this baudrate so that |
| * it can configure the Bluetooth device for @oper_speed |
| * @oper_speed: preferred baudrate of Bluetooth device; |
| * 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 |
| * @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() |
| */ |
| struct bcm_device { |
| /* Must be the first member, hci_serdev.c expects this. */ |
| struct hci_uart serdev_hu; |
| struct list_head list; |
| |
| struct device *dev; |
| |
| const char *name; |
| struct gpio_desc *device_wakeup; |
| struct gpio_desc *shutdown; |
| int (*set_device_wakeup)(struct bcm_device *, bool); |
| int (*set_shutdown)(struct bcm_device *, bool); |
| #ifdef CONFIG_ACPI |
| acpi_handle btlp, btpu, btpd; |
| int gpio_count; |
| int gpio_int_idx; |
| #endif |
| |
| struct clk *txco_clk; |
| struct clk *lpo_clk; |
| struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; |
| bool res_enabled; |
| |
| u32 init_speed; |
| u32 oper_speed; |
| int irq; |
| bool irq_active_low; |
| bool irq_acquired; |
| |
| #ifdef CONFIG_PM |
| struct hci_uart *hu; |
| bool is_suspended; |
| #endif |
| bool no_early_set_baudrate; |
| bool drive_rts_on_open; |
| u8 pcm_int_params[5]; |
| }; |
| |
| /* generic bcm uart resources */ |
| struct bcm_data { |
| struct sk_buff *rx_skb; |
| struct sk_buff_head txq; |
| |
| struct bcm_device *dev; |
| }; |
| |
| /* List of BCM BT UART devices */ |
| static DEFINE_MUTEX(bcm_device_lock); |
| static LIST_HEAD(bcm_device_list); |
| |
| static int irq_polarity = -1; |
| module_param(irq_polarity, int, 0444); |
| MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); |
| |
| static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
| { |
| if (hu->serdev) |
| serdev_device_set_baudrate(hu->serdev, speed); |
| else |
| hci_uart_set_baudrate(hu, speed); |
| } |
| |
| static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
| { |
| struct hci_dev *hdev = hu->hdev; |
| struct sk_buff *skb; |
| struct bcm_update_uart_baud_rate param; |
| |
| if (speed > 3000000) { |
| struct bcm_write_uart_clock_setting clock; |
| |
| clock.type = BCM_UART_CLOCK_48MHZ; |
| |
| bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); |
| |
| /* This Broadcom specific command changes the UART's controller |
| * clock for baud rate > 3000000. |
| */ |
| skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); |
| if (IS_ERR(skb)) { |
| int err = PTR_ERR(skb); |
| bt_dev_err(hdev, "BCM: failed to write clock (%d)", |
| err); |
| return err; |
| } |
| |
| kfree_skb(skb); |
| } |
| |
| bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); |
| |
| param.zero = cpu_to_le16(0); |
| param.baud_rate = cpu_to_le32(speed); |
| |
| /* This Broadcom specific command changes the UART's controller baud |
| * rate. |
| */ |
| skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, |
| HCI_INIT_TIMEOUT); |
| if (IS_ERR(skb)) { |
| int err = PTR_ERR(skb); |
| bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", |
| err); |
| return err; |
| } |
| |
| kfree_skb(skb); |
| |
| return 0; |
| } |
| |
| /* bcm_device_exists should be protected by bcm_device_lock */ |
| static bool bcm_device_exists(struct bcm_device *device) |
| { |
| struct list_head *p; |
| |
| #ifdef CONFIG_PM |
| /* Devices using serdev always exist */ |
| if (device && device->hu && device->hu->serdev) |
| return true; |
| #endif |
| |
| list_for_each(p, &bcm_device_list) { |
| struct bcm_device *dev = list_entry(p, struct bcm_device, list); |
| |
| if (device == dev) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) |
| { |
| int err; |
| |
| if (powered && !dev->res_enabled) { |
| /* Intel Macs use bcm_apple_get_resources() and don't |
| * have regulator supplies configured. |
| */ |
| if (dev->supplies[0].supply) { |
| err = regulator_bulk_enable(BCM_NUM_SUPPLIES, |
| dev->supplies); |
| if (err) |
| return err; |
| } |
| |
| /* LPO clock needs to be 32.768 kHz */ |
| err = clk_set_rate(dev->lpo_clk, 32768); |
| if (err) { |
| dev_err(dev->dev, "Could not set LPO clock rate\n"); |
| goto err_regulator_disable; |
| } |
| |
| err = clk_prepare_enable(dev->lpo_clk); |
| if (err) |
| goto err_regulator_disable; |
| |
| err = clk_prepare_enable(dev->txco_clk); |
| if (err) |
| goto err_lpo_clk_disable; |
| } |
| |
| err = dev->set_shutdown(dev, powered); |
| if (err) |
| goto err_txco_clk_disable; |
| |
| err = dev->set_device_wakeup(dev, powered); |
| if (err) |
| goto err_revert_shutdown; |
| |
| if (!powered && dev->res_enabled) { |
| clk_disable_unprepare(dev->txco_clk); |
| clk_disable_unprepare(dev->lpo_clk); |
| |
| /* Intel Macs use bcm_apple_get_resources() and don't |
| * have regulator supplies configured. |
| */ |
| if (dev->supplies[0].supply) |
| regulator_bulk_disable(BCM_NUM_SUPPLIES, |
| dev->supplies); |
| } |
| |
| /* wait for device to power on and come out of reset */ |
| usleep_range(100000, 120000); |
| |
| dev->res_enabled = powered; |
| |
| return 0; |
| |
| err_revert_shutdown: |
| dev->set_shutdown(dev, !powered); |
| err_txco_clk_disable: |
| if (powered && !dev->res_enabled) |
| clk_disable_unprepare(dev->txco_clk); |
| err_lpo_clk_disable: |
| if (powered && !dev->res_enabled) |
| clk_disable_unprepare(dev->lpo_clk); |
| err_regulator_disable: |
| if (powered && !dev->res_enabled) |
| regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); |
| return err; |
| } |
| |
| #ifdef CONFIG_PM |
| static irqreturn_t bcm_host_wake(int irq, void *data) |
| { |
| struct bcm_device *bdev = 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; |
| } |
| |
| static int bcm_request_irq(struct bcm_data *bcm) |
| { |
| struct bcm_device *bdev = bcm->dev; |
| int err; |
| |
| mutex_lock(&bcm_device_lock); |
| if (!bcm_device_exists(bdev)) { |
| err = -ENODEV; |
| goto unlock; |
| } |
| |
| if (bdev->irq <= 0) { |
| err = -EOPNOTSUPP; |
| goto unlock; |
| } |
| |
| err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, |
| bdev->irq_active_low ? IRQF_TRIGGER_FALLING : |
| IRQF_TRIGGER_RISING, |
| "host_wake", bdev); |
| if (err) { |
| bdev->irq = err; |
| goto unlock; |
| } |
| |
| bdev->irq_acquired = true; |
| |
| device_init_wakeup(bdev->dev, true); |
| |
| pm_runtime_set_autosuspend_delay(bdev->dev, |
| BCM_AUTOSUSPEND_DELAY); |
| pm_runtime_use_autosuspend(bdev->dev); |
| pm_runtime_set_active(bdev->dev); |
| pm_runtime_enable(bdev->dev); |
| |
| unlock: |
| mutex_unlock(&bcm_device_lock); |
| |
| return err; |
| } |
| |
| static const struct bcm_set_sleep_mode default_sleep_params = { |
| .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ |
| .idle_host = 2, /* idle threshold HOST, in 300ms */ |
| .idle_dev = 2, /* idle threshold device, in 300ms */ |
| .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ |
| .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ |
| .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ |
| .combine_modes = 1, /* Combine sleep and LPM flag */ |
| .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
| /* Irrelevant USB flags */ |
| .usb_auto_sleep = 0, |
| .usb_resume_timeout = 0, |
| .break_to_host = 0, |
| .pulsed_host_wake = 1, |
| }; |
| |
| static int bcm_setup_sleep(struct hci_uart *hu) |
| { |
| struct bcm_data *bcm = hu->priv; |
| struct sk_buff *skb; |
| struct bcm_set_sleep_mode sleep_params = default_sleep_params; |
| |
| sleep_params.host_wake_active = !bcm->dev->irq_active_low; |
| |
| skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), |
| &sleep_params, HCI_INIT_TIMEOUT); |
| if (IS_ERR(skb)) { |
| int err = PTR_ERR(skb); |
| bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); |
| return err; |
| } |
| kfree_skb(skb); |
| |
| bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); |
| |
| return 0; |
| } |
| #else |
| static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } |
| static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } |
| #endif |
| |
| static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
| { |
| struct hci_uart *hu = hci_get_drvdata(hdev); |
| struct bcm_data *bcm = hu->priv; |
| struct sk_buff *skb; |
| |
| if (!test_bit(HCI_RUNNING, &hdev->flags)) |
| return -ENETDOWN; |
| |
| skb = bt_skb_alloc(3, GFP_KERNEL); |
| if (!skb) |
| return -ENOMEM; |
| |
| skb_put_u8(skb, BCM_LM_DIAG_PKT); |
| skb_put_u8(skb, 0xf0); |
| skb_put_u8(skb, enable); |
| |
| skb_queue_tail(&bcm->txq, skb); |
| hci_uart_tx_wakeup(hu); |
| |
| return 0; |
| } |
| |
| static int bcm_open(struct hci_uart *hu) |
| { |
| struct bcm_data *bcm; |
| struct list_head *p; |
| int err; |
| |
| bt_dev_dbg(hu->hdev, "hu %p", hu); |
| |
| if (!hci_uart_has_flow_control(hu)) |
| return -EOPNOTSUPP; |
| |
| bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); |
| if (!bcm) |
| return -ENOMEM; |
| |
| skb_queue_head_init(&bcm->txq); |
| |
| hu->priv = bcm; |
| |
| mutex_lock(&bcm_device_lock); |
| |
| if (hu->serdev) { |
| bcm->dev = serdev_device_get_drvdata(hu->serdev); |
| goto out; |
| } |
| |
| if (!hu->tty->dev) |
| goto out; |
| |
| list_for_each(p, &bcm_device_list) { |
| struct bcm_device *dev = list_entry(p, struct bcm_device, list); |
| |
| /* Retrieve saved bcm_device based on parent of the |
| * platform device (saved during device probe) and |
| * parent of tty device used by hci_uart |
| */ |
| if (hu->tty->dev->parent == dev->dev->parent) { |
| bcm->dev = dev; |
| #ifdef CONFIG_PM |
| dev->hu = hu; |
| #endif |
| break; |
| } |
| } |
| |
| out: |
| if (bcm->dev) { |
| if (bcm->dev->drive_rts_on_open) |
| hci_uart_set_flow_control(hu, true); |
| |
| 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) |
| hu->oper_speed = bcm->dev->oper_speed; |
| |
| err = bcm_gpio_set_power(bcm->dev, true); |
| |
| if (bcm->dev->drive_rts_on_open) |
| hci_uart_set_flow_control(hu, false); |
| |
| if (err) |
| goto err_unset_hu; |
| } |
| |
| mutex_unlock(&bcm_device_lock); |
| return 0; |
| |
| err_unset_hu: |
| #ifdef CONFIG_PM |
| if (!hu->serdev) |
| bcm->dev->hu = NULL; |
| #endif |
| mutex_unlock(&bcm_device_lock); |
| hu->priv = NULL; |
| kfree(bcm); |
| return err; |
| } |
| |
| static int bcm_close(struct hci_uart *hu) |
| { |
| struct bcm_data *bcm = hu->priv; |
| struct bcm_device *bdev = NULL; |
| int err; |
| |
| bt_dev_dbg(hu->hdev, "hu %p", hu); |
| |
| /* Protect bcm->dev against removal of the device or driver */ |
| mutex_lock(&bcm_device_lock); |
| |
| if (hu->serdev) { |
| bdev = serdev_device_get_drvdata(hu->serdev); |
| } else if (bcm_device_exists(bcm->dev)) { |
| bdev = bcm->dev; |
| #ifdef CONFIG_PM |
| bdev->hu = NULL; |
| #endif |
| } |
| |
| if (bdev) { |
| if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) { |
| devm_free_irq(bdev->dev, bdev->irq, bdev); |
| device_init_wakeup(bdev->dev, false); |
| pm_runtime_disable(bdev->dev); |
| } |
| |
| err = bcm_gpio_set_power(bdev, false); |
| if (err) |
| bt_dev_err(hu->hdev, "Failed to power down"); |
| else |
| pm_runtime_set_suspended(bdev->dev); |
| } |
| mutex_unlock(&bcm_device_lock); |
| |
| skb_queue_purge(&bcm->txq); |
| kfree_skb(bcm->rx_skb); |
| kfree(bcm); |
| |
| hu->priv = NULL; |
| return 0; |
| } |
| |
| static int bcm_flush(struct hci_uart *hu) |
| { |
| struct bcm_data *bcm = hu->priv; |
| |
| bt_dev_dbg(hu->hdev, "hu %p", hu); |
| |
| skb_queue_purge(&bcm->txq); |
| |
| return 0; |
| } |
| |
| static int bcm_setup(struct hci_uart *hu) |
| { |
| struct bcm_data *bcm = hu->priv; |
| char fw_name[64]; |
| const struct firmware *fw; |
| unsigned int speed; |
| int err; |
| |
| bt_dev_dbg(hu->hdev, "hu %p", hu); |
| |
| hu->hdev->set_diag = bcm_set_diag; |
| hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
| |
| err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false); |
| if (err) |
| return err; |
| |
| err = request_firmware(&fw, fw_name, &hu->hdev->dev); |
| if (err < 0) { |
| bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
| return 0; |
| } |
| |
| err = btbcm_patchram(hu->hdev, fw); |
| if (err) { |
| bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
| goto finalize; |
| } |
| |
| /* Init speed if any */ |
| if (hu->init_speed) |
| speed = hu->init_speed; |
| else if (hu->proto->init_speed) |
| speed = hu->proto->init_speed; |
| else |
| speed = 0; |
| |
| if (speed) |
| host_set_baudrate(hu, speed); |
| |
| /* Operational speed if any */ |
| if (hu->oper_speed) |
| speed = hu->oper_speed; |
| else if (bcm->dev && bcm->dev->oper_speed) |
| speed = bcm->dev->oper_speed; |
| else if (hu->proto->oper_speed) |
| speed = hu->proto->oper_speed; |
| else |
| speed = 0; |
| |
| if (speed) { |
| err = bcm_set_baudrate(hu, speed); |
| if (!err) |
| host_set_baudrate(hu, speed); |
| } |
| |
| /* PCM parameters if provided */ |
| if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) { |
| struct bcm_set_pcm_int_params params; |
| |
| btbcm_read_pcm_int_params(hu->hdev, ¶ms); |
| |
| memcpy(¶ms, bcm->dev->pcm_int_params, 5); |
| btbcm_write_pcm_int_params(hu->hdev, ¶ms); |
| } |
| |
| finalize: |
| release_firmware(fw); |
| |
| err = btbcm_finalize(hu->hdev); |
| if (err) |
| return err; |
| |
| if (!bcm_request_irq(bcm)) |
| err = bcm_setup_sleep(hu); |
| |
| return err; |
| } |
| |
| #define BCM_RECV_LM_DIAG \ |
| .type = BCM_LM_DIAG_PKT, \ |
| .hlen = BCM_LM_DIAG_SIZE, \ |
| .loff = 0, \ |
| .lsize = 0, \ |
| .maxlen = BCM_LM_DIAG_SIZE |
| |
| #define BCM_RECV_NULL \ |
| .type = BCM_NULL_PKT, \ |
| .hlen = BCM_NULL_SIZE, \ |
| .loff = 0, \ |
| .lsize = 0, \ |
| .maxlen = BCM_NULL_SIZE |
| |
| #define BCM_RECV_TYPE49 \ |
| .type = BCM_TYPE49_PKT, \ |
| .hlen = BCM_TYPE49_SIZE, \ |
| .loff = 0, \ |
| .lsize = 0, \ |
| .maxlen = BCM_TYPE49_SIZE |
| |
| #define BCM_RECV_TYPE52 \ |
| .type = BCM_TYPE52_PKT, \ |
| .hlen = BCM_TYPE52_SIZE, \ |
| .loff = 0, \ |
| .lsize = 0, \ |
| .maxlen = BCM_TYPE52_SIZE |
| |
| static const struct h4_recv_pkt bcm_recv_pkts[] = { |
| { H4_RECV_ACL, .recv = hci_recv_frame }, |
| { H4_RECV_SCO, .recv = hci_recv_frame }, |
| { H4_RECV_EVENT, .recv = hci_recv_frame }, |
| { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, |
| { BCM_RECV_NULL, .recv = hci_recv_diag }, |
| { BCM_RECV_TYPE49, .recv = hci_recv_diag }, |
| { BCM_RECV_TYPE52, .recv = hci_recv_diag }, |
| }; |
| |
| static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
| { |
| struct bcm_data *bcm = hu->priv; |
| |
| if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) |
| return -EUNATCH; |
| |
| bcm->rx_skb = h4_recv_buf(hu->hdev, 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); |
| bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
| bcm->rx_skb = NULL; |
| return err; |
| } else if (!bcm->rx_skb) { |
| /* Delay auto-suspend when receiving completed packet */ |
| 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); |
| } |
| |
| return count; |
| } |
| |
| static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) |
| { |
| struct bcm_data *bcm = hu->priv; |
| |
| bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
| |
| /* Prepend skb with frame type */ |
| memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
| skb_queue_tail(&bcm->txq, skb); |
| |
| return 0; |
| } |
| |
| static struct sk_buff *bcm_dequeue(struct hci_uart *hu) |
| { |
| struct bcm_data *bcm = hu->priv; |
| struct sk_buff *skb = NULL; |
| struct bcm_device *bdev = NULL; |
| |
| mutex_lock(&bcm_device_lock); |
| |
| if (bcm_device_exists(bcm->dev)) { |
| bdev = bcm->dev; |
| pm_runtime_get_sync(bdev->dev); |
| /* Shall be resumed here */ |
| } |
| |
| skb = skb_dequeue(&bcm->txq); |
| |
| if (bdev) { |
| pm_runtime_mark_last_busy(bdev->dev); |
| pm_runtime_put_autosuspend(bdev->dev); |
| } |
| |
| mutex_unlock(&bcm_device_lock); |
| |
| return skb; |
| } |
| |
| #ifdef CONFIG_PM |
| static int bcm_suspend_device(struct device *dev) |
| { |
| struct bcm_device *bdev = dev_get_drvdata(dev); |
| int err; |
| |
| bt_dev_dbg(bdev, ""); |
| |
| if (!bdev->is_suspended && bdev->hu) { |
| hci_uart_set_flow_control(bdev->hu, true); |
| |
| /* Once this returns, driver suspends BT via GPIO */ |
| bdev->is_suspended = true; |
| } |
| |
| /* Suspend the device */ |
| err = bdev->set_device_wakeup(bdev, false); |
| if (err) { |
| if (bdev->is_suspended && bdev->hu) { |
| bdev->is_suspended = false; |
| hci_uart_set_flow_control(bdev->hu, false); |
| } |
| return -EBUSY; |
| } |
| |
| bt_dev_dbg(bdev, "suspend, delaying 15 ms"); |
| msleep(15); |
| |
| return 0; |
| } |
| |
| static int bcm_resume_device(struct device *dev) |
| { |
| struct bcm_device *bdev = dev_get_drvdata(dev); |
| int err; |
| |
| bt_dev_dbg(bdev, ""); |
| |
| err = bdev->set_device_wakeup(bdev, true); |
| if (err) { |
| dev_err(dev, "Failed to power up\n"); |
| return err; |
| } |
| |
| bt_dev_dbg(bdev, "resume, delaying 15 ms"); |
| msleep(15); |
| |
| /* When this executes, the device has woken up already */ |
| if (bdev->is_suspended && bdev->hu) { |
| bdev->is_suspended = false; |
| |
| hci_uart_set_flow_control(bdev->hu, false); |
| } |
| |
| return 0; |
| } |
| #endif |
| |
| #ifdef CONFIG_PM_SLEEP |
| /* suspend callback */ |
| static int bcm_suspend(struct device *dev) |
| { |
| struct bcm_device *bdev = dev_get_drvdata(dev); |
| int error; |
| |
| bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); |
| |
| /* |
| * When used with a device instantiated as platform_device, bcm_suspend |
| * can be called at any time as long as the platform device is bound, |
| * so it should use bcm_device_lock to protect access to hci_uart |
| * and device_wake-up GPIO. |
| */ |
| mutex_lock(&bcm_device_lock); |
| |
| if (!bdev->hu) |
| goto unlock; |
| |
| if (pm_runtime_active(dev)) |
| bcm_suspend_device(dev); |
| |
| if (device_may_wakeup(dev) && bdev->irq > 0) { |
| error = enable_irq_wake(bdev->irq); |
| if (!error) |
| bt_dev_dbg(bdev, "BCM irq: enabled"); |
| } |
| |
| unlock: |
| mutex_unlock(&bcm_device_lock); |
| |
| return 0; |
| } |
| |
| /* resume callback */ |
| static int bcm_resume(struct device *dev) |
| { |
| struct bcm_device *bdev = dev_get_drvdata(dev); |
| int err = 0; |
| |
| bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
| |
| /* |
| * When used with a device instantiated as platform_device, bcm_resume |
| * can be called at any time as long as platform device is bound, |
| * so it should use bcm_device_lock to protect access to hci_uart |
| * and device_wake-up GPIO. |
| */ |
| mutex_lock(&bcm_device_lock); |
| |
| if (!bdev->hu) |
| goto unlock; |
| |
| if (device_may_wakeup(dev) && bdev->irq > 0) { |
| disable_irq_wake(bdev->irq); |
| bt_dev_dbg(bdev, "BCM irq: disabled"); |
| } |
| |
| err = bcm_resume_device(dev); |
| |
| unlock: |
| mutex_unlock(&bcm_device_lock); |
| |
| if (!err) { |
| pm_runtime_disable(dev); |
| pm_runtime_set_active(dev); |
| pm_runtime_enable(dev); |
| } |
| |
| return 0; |
| } |
| #endif |
| |
| /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ |
| static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { |
| { |
| .ident = "Meegopad T08", |
| .matches = { |
| DMI_EXACT_MATCH(DMI_BOARD_VENDOR, |
| "To be filled by OEM."), |
| DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), |
| DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), |
| }, |
| }, |
| { } |
| }; |
| |
| #ifdef CONFIG_ACPI |
| static const struct acpi_gpio_params first_gpio = { 0, 0, false }; |
| static const struct acpi_gpio_params second_gpio = { 1, 0, false }; |
| static const struct acpi_gpio_params third_gpio = { 2, 0, false }; |
| |
| static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { |
| { "device-wakeup-gpios", &first_gpio, 1 }, |
| { "shutdown-gpios", &second_gpio, 1 }, |
| { "host-wakeup-gpios", &third_gpio, 1 }, |
| { }, |
| }; |
| |
| static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { |
| { "host-wakeup-gpios", &first_gpio, 1 }, |
| { "device-wakeup-gpios", &second_gpio, 1 }, |
| { "shutdown-gpios", &third_gpio, 1 }, |
| { }, |
| }; |
| |
| static int bcm_resource(struct acpi_resource *ares, void *data) |
| { |
| struct bcm_device *dev = data; |
| struct acpi_resource_extended_irq *irq; |
| struct acpi_resource_gpio *gpio; |
| struct acpi_resource_uart_serialbus *sb; |
| |
| switch (ares->type) { |
| case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: |
| irq = &ares->data.extended_irq; |
| if (irq->polarity != ACPI_ACTIVE_LOW) |
| dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); |
| dev->irq_active_low = true; |
| break; |
| |
| case ACPI_RESOURCE_TYPE_GPIO: |
| gpio = &ares->data.gpio; |
| if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { |
| dev->gpio_int_idx = dev->gpio_count; |
| dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; |
| } |
| dev->gpio_count++; |
| break; |
| |
| case ACPI_RESOURCE_TYPE_SERIAL_BUS: |
| sb = &ares->data.uart_serial_bus; |
| if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
| dev->init_speed = sb->default_baud_rate; |
| dev->oper_speed = 4000000; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) |
| { |
| if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) |
| { |
| if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, |
| NULL, NULL, NULL))) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| static int bcm_apple_get_resources(struct bcm_device *dev) |
| { |
| struct acpi_device *adev = ACPI_COMPANION(dev->dev); |
| const union acpi_object *obj; |
| |
| if (!adev || |
| ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || |
| ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || |
| ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) |
| return -ENODEV; |
| |
| if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && |
| obj->buffer.length == 8) |
| dev->init_speed = *(u64 *)obj->buffer.pointer; |
| |
| dev->set_device_wakeup = bcm_apple_set_device_wakeup; |
| dev->set_shutdown = bcm_apple_set_shutdown; |
| |
| return 0; |
| } |
| #else |
| static inline int bcm_apple_get_resources(struct bcm_device *dev) |
| { |
| return -EOPNOTSUPP; |
| } |
| #endif /* CONFIG_ACPI */ |
| |
| static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) |
| { |
| gpiod_set_value_cansleep(dev->device_wakeup, awake); |
| return 0; |
| } |
| |
| static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) |
| { |
| gpiod_set_value_cansleep(dev->shutdown, powered); |
| return 0; |
| } |
| |
| /* Try a bunch of names for TXCO */ |
| 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) |
| return clk; |
| |
| /* Deprecated name */ |
| clk = devm_clk_get(dev, "extclk"); |
| if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) |
| return clk; |
| |
| /* Original code used no name at all */ |
| return devm_clk_get(dev, NULL); |
| } |
| |
| static int bcm_get_resources(struct bcm_device *dev) |
| { |
| const struct dmi_system_id *dmi_id; |
| int err; |
| |
| dev->name = dev_name(dev->dev); |
| |
| if (x86_apple_machine && !bcm_apple_get_resources(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); |
| |
| if (IS_ERR(dev->lpo_clk)) |
| dev->lpo_clk = NULL; |
| |
| /* Check if we accidentally fetched the lpo clock twice */ |
| if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { |
| devm_clk_put(dev->dev, dev->txco_clk); |
| dev->txco_clk = NULL; |
| } |
| |
| dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", |
| GPIOD_OUT_LOW); |
| if (IS_ERR(dev->device_wakeup)) |
| return PTR_ERR(dev->device_wakeup); |
| |
| dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", |
| GPIOD_OUT_LOW); |
| if (IS_ERR(dev->shutdown)) |
| return PTR_ERR(dev->shutdown); |
| |
| dev->set_device_wakeup = bcm_gpio_set_device_wakeup; |
| dev->set_shutdown = bcm_gpio_set_shutdown; |
| |
| dev->supplies[0].supply = "vbat"; |
| dev->supplies[1].supply = "vddio"; |
| err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, |
| dev->supplies); |
| if (err) |
| return err; |
| |
| /* 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); |
| 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; |
| } |
| |
| dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); |
| return 0; |
| } |
| |
| #ifdef CONFIG_ACPI |
| static int bcm_acpi_probe(struct bcm_device *dev) |
| { |
| LIST_HEAD(resources); |
| const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; |
| struct resource_entry *entry; |
| int ret; |
| |
| /* Retrieve UART ACPI info */ |
| dev->gpio_int_idx = -1; |
| ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), |
| &resources, bcm_resource, dev); |
| if (ret < 0) |
| return ret; |
| |
| resource_list_for_each_entry(entry, &resources) { |
| if (resource_type(entry->res) == IORESOURCE_IRQ) { |
| dev->irq = entry->res->start; |
| break; |
| } |
| } |
| acpi_dev_free_resource_list(&resources); |
| |
| /* If the DSDT uses an Interrupt resource for the IRQ, then there are |
| * only 2 GPIO resources, we use the irq-last mapping for this, since |
| * we already have an irq the 3th / last mapping will not be used. |
| */ |
| if (dev->irq) |
| gpio_mapping = acpi_bcm_int_last_gpios; |
| else if (dev->gpio_int_idx == 0) |
| gpio_mapping = acpi_bcm_int_first_gpios; |
| else if (dev->gpio_int_idx == 2) |
| gpio_mapping = acpi_bcm_int_last_gpios; |
| else |
| dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", |
| dev->gpio_int_idx); |
| |
| /* Warn if our expectations are not met. */ |
| if (dev->gpio_count != (dev->irq ? 2 : 3)) |
| dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", |
| dev->gpio_count); |
| |
| ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); |
| if (ret) |
| return ret; |
| |
| if (irq_polarity != -1) { |
| dev->irq_active_low = irq_polarity; |
| dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", |
| dev->irq_active_low ? "low" : "high"); |
| } |
| |
| return 0; |
| } |
| #else |
| static int bcm_acpi_probe(struct bcm_device *dev) |
| { |
| return -EINVAL; |
| } |
| #endif /* CONFIG_ACPI */ |
| |
| static int bcm_of_probe(struct bcm_device *bdev) |
| { |
| 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); |
| bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup"); |
| bdev->irq_active_low = irq_get_trigger_type(bdev->irq) |
| & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW); |
| return 0; |
| } |
| |
| static int bcm_probe(struct platform_device *pdev) |
| { |
| struct bcm_device *dev; |
| int ret; |
| |
| dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); |
| if (!dev) |
| return -ENOMEM; |
| |
| dev->dev = &pdev->dev; |
| dev->irq = platform_get_irq(pdev, 0); |
| |
| /* Initialize routing field to an unused value */ |
| dev->pcm_int_params[0] = 0xff; |
| |
| if (has_acpi_companion(&pdev->dev)) { |
| ret = bcm_acpi_probe(dev); |
| if (ret) |
| return ret; |
| } |
| |
| ret = bcm_get_resources(dev); |
| if (ret) |
| return ret; |
| |
| platform_set_drvdata(pdev, dev); |
| |
| dev_info(&pdev->dev, "%s device registered.\n", dev->name); |
| |
| /* Place this instance on the device list */ |
| mutex_lock(&bcm_device_lock); |
| list_add_tail(&dev->list, &bcm_device_list); |
| mutex_unlock(&bcm_device_lock); |
| |
| ret = bcm_gpio_set_power(dev, false); |
| if (ret) |
| dev_err(&pdev->dev, "Failed to power down\n"); |
| |
| return 0; |
| } |
| |
| static int bcm_remove(struct platform_device *pdev) |
| { |
| struct bcm_device *dev = platform_get_drvdata(pdev); |
| |
| mutex_lock(&bcm_device_lock); |
| list_del(&dev->list); |
| 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 = { |
| .id = HCI_UART_BCM, |
| .name = "Broadcom", |
| .manufacturer = 15, |
| .init_speed = 115200, |
| .open = bcm_open, |
| .close = bcm_close, |
| .flush = bcm_flush, |
| .setup = bcm_setup, |
| .set_baudrate = bcm_set_baudrate, |
| .recv = bcm_recv, |
| .enqueue = bcm_enqueue, |
| .dequeue = bcm_dequeue, |
| }; |
| |
| #ifdef CONFIG_ACPI |
| static const struct acpi_device_id bcm_acpi_match[] = { |
| { "BCM2E00" }, |
| { "BCM2E01" }, |
| { "BCM2E02" }, |
| { "BCM2E03" }, |
| { "BCM2E04" }, |
| { "BCM2E05" }, |
| { "BCM2E06" }, |
| { "BCM2E07" }, |
| { "BCM2E08" }, |
| { "BCM2E09" }, |
| { "BCM2E0A" }, |
| { "BCM2E0B" }, |
| { "BCM2E0C" }, |
| { "BCM2E0D" }, |
| { "BCM2E0E" }, |
| { "BCM2E0F" }, |
| { "BCM2E10" }, |
| { "BCM2E11" }, |
| { "BCM2E12" }, |
| { "BCM2E13" }, |
| { "BCM2E14" }, |
| { "BCM2E15" }, |
| { "BCM2E16" }, |
| { "BCM2E17" }, |
| { "BCM2E18" }, |
| { "BCM2E19" }, |
| { "BCM2E1A" }, |
| { "BCM2E1B" }, |
| { "BCM2E1C" }, |
| { "BCM2E1D" }, |
| { "BCM2E1F" }, |
| { "BCM2E20" }, |
| { "BCM2E21" }, |
| { "BCM2E22" }, |
| { "BCM2E23" }, |
| { "BCM2E24" }, |
| { "BCM2E25" }, |
| { "BCM2E26" }, |
| { "BCM2E27" }, |
| { "BCM2E28" }, |
| { "BCM2E29" }, |
| { "BCM2E2A" }, |
| { "BCM2E2B" }, |
| { "BCM2E2C" }, |
| { "BCM2E2D" }, |
| { "BCM2E2E" }, |
| { "BCM2E2F" }, |
| { "BCM2E30" }, |
| { "BCM2E31" }, |
| { "BCM2E32" }, |
| { "BCM2E33" }, |
| { "BCM2E34" }, |
| { "BCM2E35" }, |
| { "BCM2E36" }, |
| { "BCM2E37" }, |
| { "BCM2E38" }, |
| { "BCM2E39" }, |
| { "BCM2E3A" }, |
| { "BCM2E3B" }, |
| { "BCM2E3C" }, |
| { "BCM2E3D" }, |
| { "BCM2E3E" }, |
| { "BCM2E3F" }, |
| { "BCM2E40" }, |
| { "BCM2E41" }, |
| { "BCM2E42" }, |
| { "BCM2E43" }, |
| { "BCM2E44" }, |
| { "BCM2E45" }, |
| { "BCM2E46" }, |
| { "BCM2E47" }, |
| { "BCM2E48" }, |
| { "BCM2E49" }, |
| { "BCM2E4A" }, |
| { "BCM2E4B" }, |
| { "BCM2E4C" }, |
| { "BCM2E4D" }, |
| { "BCM2E4E" }, |
| { "BCM2E4F" }, |
| { "BCM2E50" }, |
| { "BCM2E51" }, |
| { "BCM2E52" }, |
| { "BCM2E53" }, |
| { "BCM2E54" }, |
| { "BCM2E55" }, |
| { "BCM2E56" }, |
| { "BCM2E57" }, |
| { "BCM2E58" }, |
| { "BCM2E59" }, |
| { "BCM2E5A" }, |
| { "BCM2E5B" }, |
| { "BCM2E5C" }, |
| { "BCM2E5D" }, |
| { "BCM2E5E" }, |
| { "BCM2E5F" }, |
| { "BCM2E60" }, |
| { "BCM2E61" }, |
| { "BCM2E62" }, |
| { "BCM2E63" }, |
| { "BCM2E64" }, |
| { "BCM2E65" }, |
| { "BCM2E66" }, |
| { "BCM2E67" }, |
| { "BCM2E68" }, |
| { "BCM2E69" }, |
| { "BCM2E6B" }, |
| { "BCM2E6D" }, |
| { "BCM2E6E" }, |
| { "BCM2E6F" }, |
| { "BCM2E70" }, |
| { "BCM2E71" }, |
| { "BCM2E72" }, |
| { "BCM2E73" }, |
| { "BCM2E74" }, |
| { "BCM2E75" }, |
| { "BCM2E76" }, |
| { "BCM2E77" }, |
| { "BCM2E78" }, |
| { "BCM2E79" }, |
| { "BCM2E7A" }, |
| { "BCM2E7B" }, |
| { "BCM2E7C" }, |
| { "BCM2E7D" }, |
| { "BCM2E7E" }, |
| { "BCM2E7F" }, |
| { "BCM2E80" }, |
| { "BCM2E81" }, |
| { "BCM2E82" }, |
| { "BCM2E83" }, |
| { "BCM2E84" }, |
| { "BCM2E85" }, |
| { "BCM2E86" }, |
| { "BCM2E87" }, |
| { "BCM2E88" }, |
| { "BCM2E89" }, |
| { "BCM2E8A" }, |
| { "BCM2E8B" }, |
| { "BCM2E8C" }, |
| { "BCM2E8D" }, |
| { "BCM2E8E" }, |
| { "BCM2E90" }, |
| { "BCM2E92" }, |
| { "BCM2E93" }, |
| { "BCM2E94" }, |
| { "BCM2E95" }, |
| { "BCM2E96" }, |
| { "BCM2E97" }, |
| { "BCM2E98" }, |
| { "BCM2E99" }, |
| { "BCM2E9A" }, |
| { "BCM2E9B" }, |
| { "BCM2E9C" }, |
| { "BCM2E9D" }, |
| { "BCM2EA0" }, |
| { "BCM2EA1" }, |
| { "BCM2EA2" }, |
| { "BCM2EA3" }, |
| { "BCM2EA4" }, |
| { "BCM2EA5" }, |
| { "BCM2EA6" }, |
| { "BCM2EA7" }, |
| { "BCM2EA8" }, |
| { "BCM2EA9" }, |
| { "BCM2EAA" }, |
| { "BCM2EAB" }, |
| { "BCM2EAC" }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); |
| #endif |
| |
| /* suspend and resume callbacks */ |
| static const struct dev_pm_ops bcm_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) |
| SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) |
| }; |
| |
| static struct platform_driver bcm_driver = { |
| .probe = bcm_probe, |
| .remove = bcm_remove, |
| .driver = { |
| .name = "hci_bcm", |
| .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
| .pm = &bcm_pm_ops, |
| }, |
| }; |
| |
| static int bcm_serdev_probe(struct serdev_device *serdev) |
| { |
| struct bcm_device *bcmdev; |
| const struct bcm_device_data *data; |
| int err; |
| |
| bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); |
| if (!bcmdev) |
| return -ENOMEM; |
| |
| bcmdev->dev = &serdev->dev; |
| #ifdef CONFIG_PM |
| bcmdev->hu = &bcmdev->serdev_hu; |
| #endif |
| bcmdev->serdev_hu.serdev = serdev; |
| serdev_device_set_drvdata(serdev, bcmdev); |
| |
| /* Initialize routing field to an unused value */ |
| bcmdev->pcm_int_params[0] = 0xff; |
| |
| if (has_acpi_companion(&serdev->dev)) |
| err = bcm_acpi_probe(bcmdev); |
| else |
| err = bcm_of_probe(bcmdev); |
| if (err) |
| return err; |
| |
| err = bcm_get_resources(bcmdev); |
| if (err) |
| return err; |
| |
| if (!bcmdev->shutdown) { |
| dev_warn(&serdev->dev, |
| "No reset resource, using default baud rate\n"); |
| bcmdev->oper_speed = bcmdev->init_speed; |
| } |
| |
| err = bcm_gpio_set_power(bcmdev, false); |
| if (err) |
| dev_err(&serdev->dev, "Failed to power down\n"); |
| |
| data = device_get_match_data(bcmdev->dev); |
| if (data) { |
| bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; |
| bcmdev->drive_rts_on_open = data->drive_rts_on_open; |
| } |
| |
| return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); |
| } |
| |
| static void bcm_serdev_remove(struct serdev_device *serdev) |
| { |
| struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); |
| |
| hci_uart_unregister_device(&bcmdev->serdev_hu); |
| } |
| |
| #ifdef CONFIG_OF |
| static struct bcm_device_data bcm4354_device_data = { |
| .no_early_set_baudrate = true, |
| }; |
| |
| static struct bcm_device_data bcm43438_device_data = { |
| .drive_rts_on_open = true, |
| }; |
| |
| static const struct of_device_id bcm_bluetooth_of_match[] = { |
| { .compatible = "brcm,bcm20702a1" }, |
| { .compatible = "brcm,bcm4329-bt" }, |
| { .compatible = "brcm,bcm4345c5" }, |
| { .compatible = "brcm,bcm4330-bt" }, |
| { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data }, |
| { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, |
| { .compatible = "brcm,bcm4335a0" }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); |
| #endif |
| |
| static struct serdev_device_driver bcm_serdev_driver = { |
| .probe = bcm_serdev_probe, |
| .remove = bcm_serdev_remove, |
| .driver = { |
| .name = "hci_uart_bcm", |
| .of_match_table = of_match_ptr(bcm_bluetooth_of_match), |
| .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
| .pm = &bcm_pm_ops, |
| }, |
| }; |
| |
| int __init bcm_init(void) |
| { |
| /* For now, we need to keep both platform device |
| * driver (ACPI generated) and serdev driver (DT). |
| */ |
| platform_driver_register(&bcm_driver); |
| serdev_device_driver_register(&bcm_serdev_driver); |
| |
| return hci_uart_register_proto(&bcm_proto); |
| } |
| |
| int __exit bcm_deinit(void) |
| { |
| platform_driver_unregister(&bcm_driver); |
| serdev_device_driver_unregister(&bcm_serdev_driver); |
| |
| return hci_uart_unregister_proto(&bcm_proto); |
| } |