This is a note to let you know that I've just added the patch titled Bluetooth: btmtksdio: refactor btmtksdio_runtime_[suspend|resume]() to the 5.17-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: bluetooth-btmtksdio-refactor-btmtksdio_runtime_-susp.patch and it can be found in the queue-5.17 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 434de0385abe4a79471f3815dff240914b9fb05a Author: Mark Chen <mark-yw.chen@xxxxxxxxxxxx> Date: Wed Jan 12 15:39:12 2022 +0800 Bluetooth: btmtksdio: refactor btmtksdio_runtime_[suspend|resume]() [ Upstream commit c7e301d7c85544607ccc52ca5f26d20c59485342 ] Refactor btmtksdio_runtime_[suspend|resume]() to create the common funcitons btmtksdio_[fw|drv]_pmctrl() shared with btmtksdio_[open|close]() to avoid the redundant code as well. This is also a prerequisite patch for the incoming patches. Co-developed-by: Sean Wang <sean.wang@xxxxxxxxxxxx> Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx> Signed-off-by: Mark Chen <mark-yw.chen@xxxxxxxxxxxx> Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c index c05578b52d33..cf757574fb63 100644 --- a/drivers/bluetooth/btmtksdio.c +++ b/drivers/bluetooth/btmtksdio.c @@ -282,6 +282,54 @@ static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev) return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL); } +static int btmtksdio_fw_pmctrl(struct btmtksdio_dev *bdev) +{ + u32 status; + int err; + + sdio_claim_host(bdev->func); + + /* Return ownership to the device */ + sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err); + if (err < 0) + goto out; + + err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, + !(status & C_COM_DRV_OWN), 2000, 1000000); + +out: + sdio_release_host(bdev->func); + + if (err < 0) + bt_dev_err(bdev->hdev, "Cannot return ownership to device"); + + return err; +} + +static int btmtksdio_drv_pmctrl(struct btmtksdio_dev *bdev) +{ + u32 status; + int err; + + sdio_claim_host(bdev->func); + + /* Get ownership from the device */ + sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err); + if (err < 0) + goto out; + + err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, + status & C_COM_DRV_OWN, 2000, 1000000); + +out: + sdio_release_host(bdev->func); + + if (err < 0) + bt_dev_err(bdev->hdev, "Cannot get ownership from device"); + + return err; +} + static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb) { struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); @@ -541,7 +589,7 @@ static void btmtksdio_interrupt(struct sdio_func *func) static int btmtksdio_open(struct hci_dev *hdev) { struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); - u32 status, val; + u32 val; int err; sdio_claim_host(bdev->func); @@ -552,18 +600,10 @@ static int btmtksdio_open(struct hci_dev *hdev) set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); - /* Get ownership from the device */ - sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err); + err = btmtksdio_drv_pmctrl(bdev); if (err < 0) goto err_disable_func; - err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, - status & C_COM_DRV_OWN, 2000, 1000000); - if (err < 0) { - bt_dev_err(bdev->hdev, "Cannot get ownership from device"); - goto err_disable_func; - } - /* Disable interrupt & mask out all interrupt sources */ sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err); if (err < 0) @@ -633,8 +673,6 @@ static int btmtksdio_open(struct hci_dev *hdev) static int btmtksdio_close(struct hci_dev *hdev) { struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); - u32 status; - int err; sdio_claim_host(bdev->func); @@ -645,13 +683,7 @@ static int btmtksdio_close(struct hci_dev *hdev) cancel_work_sync(&bdev->txrx_work); - /* Return ownership to the device */ - sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, NULL); - - err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, - !(status & C_COM_DRV_OWN), 2000, 1000000); - if (err < 0) - bt_dev_err(bdev->hdev, "Cannot return ownership to device"); + btmtksdio_fw_pmctrl(bdev); clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); sdio_disable_func(bdev->func); @@ -1077,7 +1109,6 @@ static int btmtksdio_runtime_suspend(struct device *dev) { struct sdio_func *func = dev_to_sdio_func(dev); struct btmtksdio_dev *bdev; - u32 status; int err; bdev = sdio_get_drvdata(func); @@ -1089,19 +1120,10 @@ static int btmtksdio_runtime_suspend(struct device *dev) sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); - sdio_claim_host(bdev->func); - - sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err); - if (err < 0) - goto out; + err = btmtksdio_fw_pmctrl(bdev); - err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, - !(status & C_COM_DRV_OWN), 2000, 1000000); -out: bt_dev_info(bdev->hdev, "status (%d) return ownership to device", err); - sdio_release_host(bdev->func); - return err; } @@ -1109,7 +1131,6 @@ static int btmtksdio_runtime_resume(struct device *dev) { struct sdio_func *func = dev_to_sdio_func(dev); struct btmtksdio_dev *bdev; - u32 status; int err; bdev = sdio_get_drvdata(func); @@ -1119,19 +1140,10 @@ static int btmtksdio_runtime_resume(struct device *dev) if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) return 0; - sdio_claim_host(bdev->func); - - sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err); - if (err < 0) - goto out; + err = btmtksdio_drv_pmctrl(bdev); - err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, - status & C_COM_DRV_OWN, 2000, 1000000); -out: bt_dev_info(bdev->hdev, "status (%d) get ownership from device", err); - sdio_release_host(bdev->func); - return err; }