diff options
Diffstat (limited to 'drivers/bluetooth/btmtksdio.c')
| -rw-r--r-- | drivers/bluetooth/btmtksdio.c | 113 |
1 files changed, 112 insertions, 1 deletions
diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c index 8be763ab3bf4..8e200e80d2f6 100644 --- a/drivers/bluetooth/btmtksdio.c +++ b/drivers/bluetooth/btmtksdio.c @@ -12,10 +12,12 @@ #include <asm/unaligned.h> #include <linux/atomic.h> +#include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/pm_runtime.h> #include <linux/skbuff.h> @@ -83,6 +85,7 @@ MODULE_DEVICE_TABLE(sdio, btmtksdio_table); #define MTK_REG_CHCR 0xc #define C_INT_CLR_CTRL BIT(1) +#define BT_RST_DONE BIT(8) /* CHISR have the same bits field definition with CHIER */ #define MTK_REG_CHISR 0x10 @@ -114,6 +117,7 @@ MODULE_DEVICE_TABLE(sdio, btmtksdio_table); #define BTMTKSDIO_HW_TX_READY 2 #define BTMTKSDIO_FUNC_ENABLED 3 #define BTMTKSDIO_PATCH_ENABLED 4 +#define BTMTKSDIO_HW_RESET_ACTIVE 5 struct mtkbtsdio_hdr { __le16 len; @@ -133,6 +137,8 @@ struct btmtksdio_dev { struct sk_buff *evt_skb; const struct btmtksdio_data *data; + + struct gpio_desc *reset; }; static int mtk_hci_wmt_sync(struct hci_dev *hdev, @@ -297,6 +303,11 @@ static u32 btmtksdio_drv_own_query_79xx(struct btmtksdio_dev *bdev) return sdio_readl(bdev->func, MTK_REG_PD2HRM0R, NULL); } +static u32 btmtksdio_chcr_query(struct btmtksdio_dev *bdev) +{ + return sdio_readl(bdev->func, MTK_REG_CHCR, NULL); +} + static int btmtksdio_fw_pmctrl(struct btmtksdio_dev *bdev) { u32 status; @@ -967,6 +978,28 @@ static int btmtksdio_sco_setting(struct hci_dev *hdev) return btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0); } +static int btmtksdio_reset_setting(struct hci_dev *hdev) +{ + int err; + u32 val; + + err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val); + if (err < 0) + return err; + + val |= 0x20; /* set the pin (bit field 11:8) work as GPIO mode */ + err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0); + if (err < 0) + return err; + + err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val); + if (err < 0) + return err; + + val |= MT7921_BTSYS_RST_WITH_GPIO; + return btmtksdio_mtk_reg_write(hdev, MT7921_BTSYS_RST, val, ~0); +} + static int btmtksdio_setup(struct hci_dev *hdev) { struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); @@ -974,13 +1007,32 @@ static int btmtksdio_setup(struct hci_dev *hdev) unsigned long long duration; char fwname[64]; int err, dev_id; - u32 fw_version = 0; + u32 fw_version = 0, val; calltime = ktime_get(); set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state); switch (bdev->data->chipid) { case 0x7921: + if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) { + err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS, + &val); + if (err < 0) + return err; + + val &= ~BT_DL_STATE; + err = btmtksdio_mtk_reg_write(hdev, MT7921_DLSTATUS, + val, ~0); + if (err < 0) + return err; + + btmtksdio_fw_pmctrl(bdev); + msleep(20); + btmtksdio_drv_pmctrl(bdev); + + clear_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state); + } + err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id); if (err < 0) { bt_dev_err(hdev, "Failed to get device id (%d)", err); @@ -1015,6 +1067,16 @@ static int btmtksdio_setup(struct hci_dev *hdev) return err; } + /* Enable GPIO reset mechanism */ + if (bdev->reset) { + err = btmtksdio_reset_setting(hdev); + if (err < 0) { + bt_dev_err(hdev, "Failed to enable Reset setting (%d)", err); + devm_gpiod_put(bdev->dev, bdev->reset); + bdev->reset = NULL; + } + } + break; case 0x7663: case 0x7668: @@ -1111,6 +1173,47 @@ static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb) return 0; } +static void btmtksdio_cmd_timeout(struct hci_dev *hdev) +{ + struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); + u32 status; + int err; + + if (!bdev->reset || bdev->data->chipid != 0x7921) + return; + + pm_runtime_get_sync(bdev->dev); + + if (test_and_set_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) + return; + + sdio_claim_host(bdev->func); + + sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); + skb_queue_purge(&bdev->txq); + cancel_work_sync(&bdev->txrx_work); + + gpiod_set_value_cansleep(bdev->reset, 1); + msleep(100); + gpiod_set_value_cansleep(bdev->reset, 0); + + err = readx_poll_timeout(btmtksdio_chcr_query, bdev, status, + status & BT_RST_DONE, 100000, 2000000); + if (err < 0) { + bt_dev_err(hdev, "Failed to reset (%d)", err); + goto err; + } + + clear_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); +err: + sdio_release_host(bdev->func); + + pm_runtime_put_noidle(bdev->dev); + pm_runtime_disable(bdev->dev); + + hci_reset_dev(hdev); +} + static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev) { struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); @@ -1172,6 +1275,7 @@ static int btmtksdio_probe(struct sdio_func *func, hdev->open = btmtksdio_open; hdev->close = btmtksdio_close; + hdev->cmd_timeout = btmtksdio_cmd_timeout; hdev->flush = btmtksdio_flush; hdev->setup = btmtksdio_setup; hdev->shutdown = btmtksdio_shutdown; @@ -1216,6 +1320,13 @@ static int btmtksdio_probe(struct sdio_func *func, if (err) bt_dev_err(hdev, "failed to initialize device wakeup"); + bdev->dev->of_node = of_find_compatible_node(NULL, NULL, + "mediatek,mt7921s-bluetooth"); + bdev->reset = devm_gpiod_get_optional(bdev->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(bdev->reset)) + err = PTR_ERR(bdev->reset); + return err; } |