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Bluetooth: mediatek: update the common setup between MT7622 and other devices 

Update the setup sequence on MT7622 to apply the same flow with MT7663U
and MT7668U USB [1] as much as possible. These additional commands are
required to parse the corresponding event to determine what current state
the Bluetooth device is on and thus it's necessary to extend
mtk_hci_wmt_sync to support the reading status in the same patch.

[1] http://lists.infradead.org/pipermail/linux-mediatek/2019-January/017074.html

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Sean Wang 2019-02-15 07:19:37 +08:00 committed by Marcel Holtmann
parent 88e5f366a1
commit e0b67035a9
1 changed files with 191 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

206
drivers/bluetooth/btmtkuart.c
View File

@ -12,6 +12,7 @@
#include <linux/atomic.h>
#include <linux/clk.h>
#include <linux/firmware.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
@ -37,7 +38,17 @@
enum {
MTK_WMT_PATCH_DWNLD = 0x1,
MTK_WMT_FUNC_CTRL = 0x6,
MTK_WMT_RST = 0x7
MTK_WMT_RST = 0x7,
MTK_WMT_SEMAPHORE = 0x17,
};
enum {
BTMTK_WMT_INVALID,
BTMTK_WMT_PATCH_UNDONE,
BTMTK_WMT_PATCH_DONE,
BTMTK_WMT_ON_UNDONE,
BTMTK_WMT_ON_DONE,
BTMTK_WMT_ON_PROGRESS,
};
struct mtk_stp_hdr {
@ -58,6 +69,24 @@ struct mtk_hci_wmt_cmd {
u8 data[256];
} __packed;
struct btmtk_hci_wmt_evt {
struct hci_event_hdr hhdr;
struct mtk_wmt_hdr whdr;
} __packed;
struct btmtk_hci_wmt_evt_funcc {
struct btmtk_hci_wmt_evt hwhdr;
__be16 status;
} __packed;
struct btmtk_tci_sleep {
u8 mode;
__le16 duration;
__le16 host_duration;
u8 host_wakeup_pin;
u8 time_compensation;
} __packed;
struct btmtk_hci_wmt_params {
u8 op;
u8 flag;
@ -76,6 +105,7 @@ struct btmtkuart_dev {
struct sk_buff_head txq;
struct sk_buff *rx_skb;
struct sk_buff *evt_skb;
u8 stp_pad[6];
u8 stp_cursor;
@ -86,9 +116,11 @@ static int mtk_hci_wmt_sync(struct hci_dev *hdev,
struct btmtk_hci_wmt_params *wmt_params)
{
struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
u32 hlen, status = BTMTK_WMT_INVALID;
struct btmtk_hci_wmt_evt *wmt_evt;
struct mtk_hci_wmt_cmd wc;
struct mtk_wmt_hdr *hdr;
u32 hlen;
int err;
hlen = sizeof(*hdr) + wmt_params->dlen;
@ -133,7 +165,41 @@ static int mtk_hci_wmt_sync(struct hci_dev *hdev,
return -ETIMEDOUT;
}
return 0;
/* Parse and handle the return WMT event */
wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data;
if (wmt_evt->whdr.op != hdr->op) {
bt_dev_err(hdev, "Wrong op received %d expected %d",
wmt_evt->whdr.op, hdr->op);
err = -EIO;
goto err_free_skb;
}
switch (wmt_evt->whdr.op) {
case MTK_WMT_SEMAPHORE:
if (wmt_evt->whdr.flag == 2)
status = BTMTK_WMT_PATCH_UNDONE;
else
status = BTMTK_WMT_PATCH_DONE;
break;
case MTK_WMT_FUNC_CTRL:
wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
status = BTMTK_WMT_ON_DONE;
else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
status = BTMTK_WMT_ON_PROGRESS;
else
status = BTMTK_WMT_ON_UNDONE;
break;
}
if (wmt_params->status)
*wmt_params->status = status;
err_free_skb:
kfree_skb(bdev->evt_skb);
bdev->evt_skb = NULL;
return err;
}
static int mtk_setup_fw(struct hci_dev *hdev)
@ -184,13 +250,29 @@ static int mtk_setup_fw(struct hci_dev *hdev)
if (err < 0) {
bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
err);
break;
goto free_fw;
}
fw_size -= dlen;
fw_ptr += dlen;
}
wmt_params.op = MTK_WMT_RST;
wmt_params.flag = 4;
wmt_params.dlen = 0;
wmt_params.data = NULL;
wmt_params.status = NULL;
/* Activate funciton the firmware providing to */
err = mtk_hci_wmt_sync(hdev, &wmt_params);
if (err < 0) {
bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
goto free_fw;
}
/* Wait a few moments for firmware activation done */
usleep_range(10000, 12000);
free_fw:
release_firmware(fw);
return err;
@ -209,7 +291,20 @@ static int btmtkuart_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
if (hdr->evt == 0xe4)
hdr->evt = HCI_EV_VENDOR;
/* When someone waits for the WMT event, the skb is being cloned
* and being processed the events from there then.
*/
if (test_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state)) {
bdev->evt_skb = skb_clone(skb, GFP_KERNEL);
if (!bdev->evt_skb) {
err = -ENOMEM;
goto err_out;
}
}
err = hci_recv_frame(hdev, skb);
if (err < 0)
goto err_free_skb;
if (hdr->evt == HCI_EV_VENDOR) {
if (test_and_clear_bit(BTMTKUART_TX_WAIT_VND_EVT,
@ -220,6 +315,13 @@ static int btmtkuart_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
}
}
return 0;
err_free_skb:
kfree_skb(bdev->evt_skb);
bdev->evt_skb = NULL;
err_out:
return err;
}
@ -482,28 +584,79 @@ static int btmtkuart_flush(struct hci_dev *hdev)
return 0;
}
static int btmtkuart_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 = MTK_WMT_FUNC_CTRL;
wmt_params.flag = 4;
wmt_params.dlen = sizeof(param);
wmt_params.data = &param;
wmt_params.status = &status;
err = mtk_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 btmtkuart_setup(struct hci_dev *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;
int err, status;
u8 param = 0x1;
int err = 0;
calltime = ktime_get();
/* Query whether the firmware is already download */
wmt_params.op = MTK_WMT_SEMAPHORE;
wmt_params.flag = 1;
wmt_params.dlen = 0;
wmt_params.data = NULL;
wmt_params.status = &status;
err = mtk_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 = mtk_setup_fw(hdev);
if (err < 0)
return err;
wmt_params.op = MTK_WMT_RST;
wmt_params.flag = 4;
wmt_params.dlen = 0;
wmt_params.data = NULL;
wmt_params.status = NULL;
/* Activate funciton the firmware providing to */
err = mtk_hci_wmt_sync(hdev, &wmt_params);
if (err < 0) {
bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
ignore_setup_fw:
/* Query whether the device is already enabled */
err = readx_poll_timeout(btmtkuart_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 btusb_mtk_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 */
@ -519,6 +672,29 @@ static int btmtkuart_setup(struct hci_dev *hdev)
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);
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;
}