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path: root/drivers/bluetooth/btmtk.c
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Diffstat (limited to 'drivers/bluetooth/btmtk.c')
-rw-r--r--drivers/bluetooth/btmtk.c454
1 files changed, 451 insertions, 3 deletions
diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
index 3443a0837a86..f5ecb8227d3b 100644
--- a/drivers/bluetooth/btmtk.c
+++ b/drivers/bluetooth/btmtk.c
@@ -5,6 +5,8 @@
#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/usb.h>
+#include <linux/iopoll.h>
+#include <asm/unaligned.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@@ -567,8 +569,8 @@ static int btmtk_usb_submit_wmt_recv_urb(struct hci_dev *hdev)
return err;
}
-int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
- struct btmtk_hci_wmt_params *wmt_params)
+static int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
+ struct btmtk_hci_wmt_params *wmt_params)
{
struct btmtk_data *data = hci_get_priv(hdev);
struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
@@ -694,7 +696,453 @@ err_free_wc:
kfree(wc);
return err;
}
-EXPORT_SYMBOL_GPL(btmtk_usb_hci_wmt_sync);
+
+static int btmtk_usb_func_query(struct hci_dev *hdev)
+{
+ struct btmtk_hci_wmt_params wmt_params;
+ int status, err;
+ u8 param = 0;
+
+ /* Query whether the function is enabled */
+ wmt_params.op = BTMTK_WMT_FUNC_CTRL;
+ wmt_params.flag = 4;
+ wmt_params.dlen = sizeof(param);
+ wmt_params.data = &param;
+ wmt_params.status = &status;
+
+ err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to query function status (%d)", err);
+ return err;
+ }
+
+ return status;
+}
+
+static int btmtk_usb_uhw_reg_write(struct hci_dev *hdev, u32 reg, u32 val)
+{
+ struct btmtk_data *data = hci_get_priv(hdev);
+ int pipe, err;
+ void *buf;
+
+ buf = kzalloc(4, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ put_unaligned_le32(val, buf);
+
+ pipe = usb_sndctrlpipe(data->udev, 0);
+ err = usb_control_msg(data->udev, pipe, 0x02,
+ 0x5E,
+ reg >> 16, reg & 0xffff,
+ buf, 4, USB_CTRL_SET_TIMEOUT);
+ if (err < 0)
+ bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
+
+ kfree(buf);
+
+ return err;
+}
+
+static int btmtk_usb_uhw_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
+{
+ struct btmtk_data *data = hci_get_priv(hdev);
+ int pipe, err;
+ void *buf;
+
+ buf = kzalloc(4, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ pipe = usb_rcvctrlpipe(data->udev, 0);
+ err = usb_control_msg(data->udev, pipe, 0x01,
+ 0xDE,
+ reg >> 16, reg & 0xffff,
+ buf, 4, USB_CTRL_GET_TIMEOUT);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
+ goto err_free_buf;
+ }
+
+ *val = get_unaligned_le32(buf);
+ bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
+
+err_free_buf:
+ kfree(buf);
+
+ return err;
+}
+
+static int btmtk_usb_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
+{
+ struct btmtk_data *data = hci_get_priv(hdev);
+ int pipe, err, size = sizeof(u32);
+ void *buf;
+
+ buf = kzalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ pipe = usb_rcvctrlpipe(data->udev, 0);
+ err = usb_control_msg(data->udev, pipe, 0x63,
+ USB_TYPE_VENDOR | USB_DIR_IN,
+ reg >> 16, reg & 0xffff,
+ buf, size, USB_CTRL_GET_TIMEOUT);
+ if (err < 0)
+ goto err_free_buf;
+
+ *val = get_unaligned_le32(buf);
+
+err_free_buf:
+ kfree(buf);
+
+ return err;
+}
+
+static int btmtk_usb_id_get(struct hci_dev *hdev, u32 reg, u32 *id)
+{
+ return btmtk_usb_reg_read(hdev, reg, id);
+}
+
+static u32 btmtk_usb_reset_done(struct hci_dev *hdev)
+{
+ u32 val = 0;
+
+ btmtk_usb_uhw_reg_read(hdev, MTK_BT_MISC, &val);
+
+ return val & MTK_BT_RST_DONE;
+}
+
+int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
+{
+ u32 val;
+ int err;
+
+ if (dev_id == 0x7922) {
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
+ if (err < 0)
+ return err;
+ val |= 0x00002020;
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
+ if (err < 0)
+ return err;
+ val |= BIT(0);
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
+ if (err < 0)
+ return err;
+ msleep(100);
+ } else if (dev_id == 0x7925) {
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
+ if (err < 0)
+ return err;
+ val |= (1 << 5);
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
+ if (err < 0)
+ return err;
+ val &= 0xFFFF00FF;
+ val |= (1 << 13);
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
+ if (err < 0)
+ return err;
+ val |= (1 << 0);
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
+ if (err < 0)
+ return err;
+ msleep(100);
+ } else {
+ /* It's Device EndPoint Reset Option Register */
+ bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_WDT_STATUS, &val);
+ if (err < 0)
+ return err;
+ /* Reset the bluetooth chip via USB interface. */
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 1);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
+ if (err < 0)
+ return err;
+ /* MT7921 need to delay 20ms between toggle reset bit */
+ msleep(20);
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 0);
+ if (err < 0)
+ return err;
+ err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
+ if (err < 0)
+ return err;
+ }
+
+ err = readx_poll_timeout(btmtk_usb_reset_done, hdev, val,
+ val & MTK_BT_RST_DONE, 20000, 1000000);
+ if (err < 0)
+ bt_dev_err(hdev, "Reset timeout");
+
+ if (dev_id == 0x7922) {
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
+ if (err < 0)
+ return err;
+ }
+
+ err = btmtk_usb_id_get(hdev, 0x70010200, &val);
+ if (err < 0 || !val)
+ bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_subsys_reset);
+
+int btmtk_usb_setup(struct hci_dev *hdev)
+{
+ struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+ struct btmtk_hci_wmt_params wmt_params;
+ ktime_t calltime, delta, rettime;
+ struct btmtk_tci_sleep tci_sleep;
+ unsigned long long duration;
+ struct sk_buff *skb;
+ const char *fwname;
+ int err, status;
+ u32 dev_id = 0;
+ char fw_bin_name[64];
+ u32 fw_version = 0, fw_flavor = 0;
+ u8 param;
+
+ calltime = ktime_get();
+
+ err = btmtk_usb_id_get(hdev, 0x80000008, &dev_id);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to get device id (%d)", err);
+ return err;
+ }
+
+ if (!dev_id || dev_id != 0x7663) {
+ err = btmtk_usb_id_get(hdev, 0x70010200, &dev_id);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to get device id (%d)", err);
+ return err;
+ }
+ err = btmtk_usb_id_get(hdev, 0x80021004, &fw_version);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to get fw version (%d)", err);
+ return err;
+ }
+ err = btmtk_usb_id_get(hdev, 0x70010020, &fw_flavor);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to get fw flavor (%d)", err);
+ return err;
+ }
+ fw_flavor = (fw_flavor & 0x00000080) >> 7;
+ }
+
+ btmtk_data->dev_id = dev_id;
+
+ err = btmtk_register_coredump(hdev, btmtk_data->drv_name, fw_version);
+ if (err < 0)
+ bt_dev_err(hdev, "Failed to register coredump (%d)", err);
+
+ switch (dev_id) {
+ case 0x7663:
+ fwname = FIRMWARE_MT7663;
+ break;
+ case 0x7668:
+ fwname = FIRMWARE_MT7668;
+ break;
+ case 0x7922:
+ case 0x7961:
+ case 0x7925:
+ /* Reset the device to ensure it's in the initial state before
+ * downloading the firmware to ensure.
+ */
+
+ if (!test_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags))
+ btmtk_usb_subsys_reset(hdev, dev_id);
+
+ btmtk_fw_get_filename(fw_bin_name, sizeof(fw_bin_name), dev_id,
+ fw_version, fw_flavor);
+
+ err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
+ btmtk_usb_hci_wmt_sync);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
+ clear_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags);
+ return err;
+ }
+
+ set_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags);
+
+ /* It's Device EndPoint Reset Option Register */
+ err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT,
+ MTK_EP_RST_IN_OUT_OPT);
+ if (err < 0)
+ return err;
+
+ /* Enable Bluetooth protocol */
+ param = 1;
+ wmt_params.op = BTMTK_WMT_FUNC_CTRL;
+ wmt_params.flag = 0;
+ wmt_params.dlen = sizeof(param);
+ wmt_params.data = &param;
+ wmt_params.status = NULL;
+
+ err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
+ return err;
+ }
+
+ hci_set_msft_opcode(hdev, 0xFD30);
+ hci_set_aosp_capable(hdev);
+
+ goto done;
+ default:
+ bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
+ dev_id);
+ return -ENODEV;
+ }
+
+ /* Query whether the firmware is already download */
+ wmt_params.op = BTMTK_WMT_SEMAPHORE;
+ wmt_params.flag = 1;
+ wmt_params.dlen = 0;
+ wmt_params.data = NULL;
+ wmt_params.status = &status;
+
+ err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
+ return err;
+ }
+
+ if (status == BTMTK_WMT_PATCH_DONE) {
+ bt_dev_info(hdev, "firmware already downloaded");
+ goto ignore_setup_fw;
+ }
+
+ /* Setup a firmware which the device definitely requires */
+ err = btmtk_setup_firmware(hdev, fwname,
+ btmtk_usb_hci_wmt_sync);
+ if (err < 0)
+ return err;
+
+ignore_setup_fw:
+ err = readx_poll_timeout(btmtk_usb_func_query, hdev, status,
+ status < 0 || status != BTMTK_WMT_ON_PROGRESS,
+ 2000, 5000000);
+ /* -ETIMEDOUT happens */
+ if (err < 0)
+ return err;
+
+ /* The other errors happen in btmtk_usb_func_query */
+ if (status < 0)
+ return status;
+
+ if (status == BTMTK_WMT_ON_DONE) {
+ bt_dev_info(hdev, "function already on");
+ goto ignore_func_on;
+ }
+
+ /* Enable Bluetooth protocol */
+ param = 1;
+ wmt_params.op = BTMTK_WMT_FUNC_CTRL;
+ wmt_params.flag = 0;
+ wmt_params.dlen = sizeof(param);
+ wmt_params.data = &param;
+ wmt_params.status = NULL;
+
+ err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
+ return err;
+ }
+
+ignore_func_on:
+ /* Apply the low power environment setup */
+ tci_sleep.mode = 0x5;
+ tci_sleep.duration = cpu_to_le16(0x640);
+ tci_sleep.host_duration = cpu_to_le16(0x640);
+ tci_sleep.host_wakeup_pin = 0;
+ tci_sleep.time_compensation = 0;
+
+ skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
+ return err;
+ }
+ kfree_skb(skb);
+
+done:
+ rettime = ktime_get();
+ delta = ktime_sub(rettime, calltime);
+ duration = (unsigned long long)ktime_to_ns(delta) >> 10;
+
+ bt_dev_info(hdev, "Device setup in %llu usecs", duration);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_setup);
+
+int btmtk_usb_shutdown(struct hci_dev *hdev)
+{
+ struct btmtk_hci_wmt_params wmt_params;
+ u8 param = 0;
+ int err;
+
+ /* Disable the device */
+ wmt_params.op = BTMTK_WMT_FUNC_CTRL;
+ wmt_params.flag = 0;
+ wmt_params.dlen = sizeof(param);
+ wmt_params.data = &param;
+ wmt_params.status = NULL;
+
+ err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_shutdown);
MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
MODULE_AUTHOR("Mark Chen <mark-yw.chen@mediatek.com>");
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-22 02:23:40 +0000