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-rw-r--r--drivers/bluetooth/btmtkuart.c281
1 files changed, 271 insertions, 10 deletions
diff --git a/drivers/bluetooth/btmtkuart.c b/drivers/bluetooth/btmtkuart.c
index e73b1013ba73..b0b680dd69f4 100644
--- a/drivers/bluetooth/btmtkuart.c
+++ b/drivers/bluetooth/btmtkuart.c
@@ -12,11 +12,15 @@
#include <linux/atomic.h>
#include <linux/clk.h>
#include <linux/firmware.h>
+#include <linux/gpio/consumer.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
#include <linux/serdev.h>
#include <linux/skbuff.h>
@@ -25,18 +29,26 @@
#include "h4_recv.h"
-#define VERSION "0.1"
+#define VERSION "0.2"
#define FIRMWARE_MT7622 "mediatek/mt7622pr2h.bin"
+#define FIRMWARE_MT7663 "mediatek/mt7663pr2h.bin"
+#define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin"
#define MTK_STP_TLR_SIZE 2
#define BTMTKUART_TX_STATE_ACTIVE 1
#define BTMTKUART_TX_STATE_WAKEUP 2
#define BTMTKUART_TX_WAIT_VND_EVT 3
+#define BTMTKUART_REQUIRED_WAKEUP 4
+
+#define BTMTKUART_FLAG_STANDALONE_HW BIT(0)
enum {
MTK_WMT_PATCH_DWNLD = 0x1,
+ MTK_WMT_TEST = 0x2,
+ MTK_WMT_WAKEUP = 0x3,
+ MTK_WMT_HIF = 0x4,
MTK_WMT_FUNC_CTRL = 0x6,
MTK_WMT_RST = 0x7,
MTK_WMT_SEMAPHORE = 0x17,
@@ -57,6 +69,11 @@ struct mtk_stp_hdr {
u8 cs;
} __packed;
+struct btmtkuart_data {
+ unsigned int flags;
+ const char *fwname;
+};
+
struct mtk_wmt_hdr {
u8 dir;
u8 op;
@@ -100,6 +117,14 @@ struct btmtkuart_dev {
struct serdev_device *serdev;
struct clk *clk;
+ struct regulator *vcc;
+ struct gpio_desc *reset;
+ struct pinctrl *pinctrl;
+ struct pinctrl_state *pins_runtime;
+ struct pinctrl_state *pins_boot;
+ speed_t desired_speed;
+ speed_t curr_speed;
+
struct work_struct tx_work;
unsigned long tx_state;
struct sk_buff_head txq;
@@ -110,8 +135,15 @@ struct btmtkuart_dev {
u8 stp_pad[6];
u8 stp_cursor;
u16 stp_dlen;
+
+ const struct btmtkuart_data *data;
};
+#define btmtkuart_is_standalone(bdev) \
+ ((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
+#define btmtkuart_is_builtin_soc(bdev) \
+ !((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
+
static int mtk_hci_wmt_sync(struct hci_dev *hdev,
struct btmtk_hci_wmt_params *wmt_params)
{
@@ -202,7 +234,7 @@ err_free_skb:
return err;
}
-static int mtk_setup_fw(struct hci_dev *hdev)
+static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
{
struct btmtk_hci_wmt_params wmt_params;
const struct firmware *fw;
@@ -211,7 +243,7 @@ static int mtk_setup_fw(struct hci_dev *hdev)
int err, dlen;
u8 flag;
- err = request_firmware(&fw, FIRMWARE_MT7622, &hdev->dev);
+ err = request_firmware(&fw, fwname, &hdev->dev);
if (err < 0) {
bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
return err;
@@ -523,6 +555,23 @@ static int btmtkuart_open(struct hci_dev *hdev)
goto err_open;
}
+ if (btmtkuart_is_standalone(bdev)) {
+ if (bdev->curr_speed != bdev->desired_speed)
+ err = serdev_device_set_baudrate(bdev->serdev,
+ 115200);
+ else
+ err = serdev_device_set_baudrate(bdev->serdev,
+ bdev->desired_speed);
+
+ if (err < 0) {
+ bt_dev_err(hdev, "Unable to set baudrate UART device %s",
+ dev_name(&bdev->serdev->dev));
+ goto err_serdev_close;
+ }
+
+ serdev_device_set_flow_control(bdev->serdev, false);
+ }
+
bdev->stp_cursor = 2;
bdev->stp_dlen = 0;
@@ -546,6 +595,8 @@ err_put_rpm:
pm_runtime_put_sync(dev);
err_disable_rpm:
pm_runtime_disable(dev);
+err_serdev_close:
+ serdev_device_close(bdev->serdev);
err_open:
return err;
}
@@ -606,8 +657,74 @@ static int btmtkuart_func_query(struct hci_dev *hdev)
return status;
}
+static int btmtkuart_change_baudrate(struct hci_dev *hdev)
+{
+ struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
+ struct btmtk_hci_wmt_params wmt_params;
+ u32 baudrate;
+ u8 param;
+ int err;
+
+ /* Indicate the device to enter the probe state the host is
+ * ready to change a new baudrate.
+ */
+ baudrate = cpu_to_le32(bdev->desired_speed);
+ wmt_params.op = MTK_WMT_HIF;
+ wmt_params.flag = 1;
+ wmt_params.dlen = 4;
+ wmt_params.data = &baudrate;
+ wmt_params.status = NULL;
+
+ err = mtk_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to device baudrate (%d)", err);
+ return err;
+ }
+
+ err = serdev_device_set_baudrate(bdev->serdev,
+ bdev->desired_speed);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to set up host baudrate (%d)",
+ err);
+ return err;
+ }
+
+ serdev_device_set_flow_control(bdev->serdev, false);
+
+ /* Send a dummy byte 0xff to activate the new baudrate */
+ param = 0xff;
+ err = serdev_device_write(bdev->serdev, &param, sizeof(param),
+ MAX_SCHEDULE_TIMEOUT);
+ if (err < 0 || err < sizeof(param))
+ return err;
+
+ serdev_device_wait_until_sent(bdev->serdev, 0);
+
+ /* Wait some time for the device changing baudrate done */
+ usleep_range(20000, 22000);
+
+ /* Test the new baudrate */
+ wmt_params.op = MTK_WMT_TEST;
+ wmt_params.flag = 7;
+ wmt_params.dlen = 0;
+ wmt_params.data = NULL;
+ wmt_params.status = NULL;
+
+ err = mtk_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to test new baudrate (%d)",
+ err);
+ return err;
+ }
+
+ bdev->curr_speed = bdev->desired_speed;
+
+ return 0;
+}
+
static int btmtkuart_setup(struct hci_dev *hdev)
{
+ struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
struct btmtk_hci_wmt_params wmt_params;
ktime_t calltime, delta, rettime;
struct btmtk_tci_sleep tci_sleep;
@@ -618,6 +735,28 @@ static int btmtkuart_setup(struct hci_dev *hdev)
calltime = ktime_get();
+ /* Wakeup MCUSYS is required for certain devices before we start to
+ * do any setups.
+ */
+ if (test_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state)) {
+ wmt_params.op = MTK_WMT_WAKEUP;
+ wmt_params.flag = 3;
+ wmt_params.dlen = 0;
+ wmt_params.data = NULL;
+ wmt_params.status = NULL;
+
+ err = mtk_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to wakeup the chip (%d)", err);
+ return err;
+ }
+
+ clear_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state);
+ }
+
+ if (btmtkuart_is_standalone(bdev))
+ btmtkuart_change_baudrate(hdev);
+
/* Query whether the firmware is already download */
wmt_params.op = MTK_WMT_SEMAPHORE;
wmt_params.flag = 1;
@@ -637,7 +776,7 @@ static int btmtkuart_setup(struct hci_dev *hdev)
}
/* Setup a firmware which the device definitely requires */
- err = mtk_setup_fw(hdev);
+ err = mtk_setup_firmware(hdev, bdev->data->fwname);
if (err < 0)
return err;
@@ -754,24 +893,82 @@ static int btmtkuart_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
return 0;
}
+static int btmtkuart_parse_dt(struct serdev_device *serdev)
+{
+ struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev);
+ struct device_node *node = serdev->dev.of_node;
+ u32 speed = 921600;
+ int err;
+
+ if (btmtkuart_is_standalone(bdev)) {
+ of_property_read_u32(node, "current-speed", &speed);
+
+ bdev->desired_speed = speed;
+
+ bdev->vcc = devm_regulator_get(&serdev->dev, "vcc");
+ if (IS_ERR(bdev->vcc)) {
+ err = PTR_ERR(bdev->vcc);
+ return err;
+ }
+
+ bdev->pinctrl = devm_pinctrl_get(&serdev->dev);
+ if (IS_ERR(bdev->pinctrl)) {
+ err = PTR_ERR(bdev->pinctrl);
+ return err;
+ }
+
+ bdev->pins_boot = pinctrl_lookup_state(bdev->pinctrl,
+ "default");
+ if (IS_ERR(bdev->pins_boot)) {
+ err = PTR_ERR(bdev->pins_boot);
+ return err;
+ }
+
+ bdev->pins_runtime = pinctrl_lookup_state(bdev->pinctrl,
+ "runtime");
+ if (IS_ERR(bdev->pins_runtime)) {
+ err = PTR_ERR(bdev->pins_runtime);
+ return err;
+ }
+
+ bdev->reset = devm_gpiod_get_optional(&serdev->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(bdev->reset)) {
+ err = PTR_ERR(bdev->reset);
+ return err;
+ }
+ } else if (btmtkuart_is_builtin_soc(bdev)) {
+ bdev->clk = devm_clk_get(&serdev->dev, "ref");
+ if (IS_ERR(bdev->clk))
+ return PTR_ERR(bdev->clk);
+ }
+
+ return 0;
+}
+
static int btmtkuart_probe(struct serdev_device *serdev)
{
struct btmtkuart_dev *bdev;
struct hci_dev *hdev;
+ int err;
bdev = devm_kzalloc(&serdev->dev, sizeof(*bdev), GFP_KERNEL);
if (!bdev)
return -ENOMEM;
- bdev->clk = devm_clk_get(&serdev->dev, "ref");
- if (IS_ERR(bdev->clk))
- return PTR_ERR(bdev->clk);
+ bdev->data = of_device_get_match_data(&serdev->dev);
+ if (!bdev->data)
+ return -ENODEV;
bdev->serdev = serdev;
serdev_device_set_drvdata(serdev, bdev);
serdev_device_set_client_ops(serdev, &btmtkuart_client_ops);
+ err = btmtkuart_parse_dt(serdev);
+ if (err < 0)
+ return err;
+
INIT_WORK(&bdev->tx_work, btmtkuart_tx_work);
skb_queue_head_init(&bdev->txq);
@@ -798,13 +995,54 @@ static int btmtkuart_probe(struct serdev_device *serdev)
hdev->manufacturer = 70;
set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
- if (hci_register_dev(hdev) < 0) {
+ if (btmtkuart_is_standalone(bdev)) {
+ /* Switch to the specific pin state for the booting requires */
+ pinctrl_select_state(bdev->pinctrl, bdev->pins_boot);
+
+ /* Power on */
+ err = regulator_enable(bdev->vcc);
+ if (err < 0)
+ return err;
+
+ /* Reset if the reset-gpios is available otherwise the board
+ * -level design should be guaranteed.
+ */
+ if (bdev->reset) {
+ gpiod_set_value_cansleep(bdev->reset, 1);
+ usleep_range(1000, 2000);
+ gpiod_set_value_cansleep(bdev->reset, 0);
+ }
+
+ /* Wait some time until device got ready and switch to the pin
+ * mode the device requires for UART transfers.
+ */
+ msleep(50);
+ pinctrl_select_state(bdev->pinctrl, bdev->pins_runtime);
+
+ /* A standalone device doesn't depends on power domain on SoC,
+ * so mark it as no callbacks.
+ */
+ pm_runtime_no_callbacks(&serdev->dev);
+
+ set_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state);
+ }
+
+ err = hci_register_dev(hdev);
+ if (err < 0) {
dev_err(&serdev->dev, "Can't register HCI device\n");
hci_free_dev(hdev);
- return -ENODEV;
+ goto err_regulator_disable;
}
return 0;
+
+err_regulator_disable:
+ if (btmtkuart_is_standalone(bdev)) {
+ pinctrl_select_state(bdev->pinctrl, bdev->pins_boot);
+ regulator_disable(bdev->vcc);
+ }
+
+ return err;
}
static void btmtkuart_remove(struct serdev_device *serdev)
@@ -812,13 +1050,34 @@ static void btmtkuart_remove(struct serdev_device *serdev)
struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev);
struct hci_dev *hdev = bdev->hdev;
+ if (btmtkuart_is_standalone(bdev)) {
+ pinctrl_select_state(bdev->pinctrl, bdev->pins_boot);
+ regulator_disable(bdev->vcc);
+ }
+
hci_unregister_dev(hdev);
hci_free_dev(hdev);
}
+static const struct btmtkuart_data mt7622_data = {
+ .fwname = FIRMWARE_MT7622,
+};
+
+static const struct btmtkuart_data mt7663_data = {
+ .flags = BTMTKUART_FLAG_STANDALONE_HW,
+ .fwname = FIRMWARE_MT7663,
+};
+
+static const struct btmtkuart_data mt7668_data = {
+ .flags = BTMTKUART_FLAG_STANDALONE_HW,
+ .fwname = FIRMWARE_MT7668,
+};
+
#ifdef CONFIG_OF
static const struct of_device_id mtk_of_match_table[] = {
- { .compatible = "mediatek,mt7622-bluetooth"},
+ { .compatible = "mediatek,mt7622-bluetooth", .data = &mt7622_data},
+ { .compatible = "mediatek,mt7663u-bluetooth", .data = &mt7663_data},
+ { .compatible = "mediatek,mt7668u-bluetooth", .data = &mt7668_data},
{ }
};
MODULE_DEVICE_TABLE(of, mtk_of_match_table);
@@ -840,3 +1099,5 @@ MODULE_DESCRIPTION("MediaTek Bluetooth Serial driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(FIRMWARE_MT7622);
+MODULE_FIRMWARE(FIRMWARE_MT7663);
+MODULE_FIRMWARE(FIRMWARE_MT7668);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-25 04:54:56 +0000