[PATCH 2/3] Bluetooth: btrtl: add support for the RTL8723CS
From: Vasily Khoruzhick
Date: Sun Jul 05 2020 - 15:51:48 EST
The Realtek RTL8723CS is SDIO WiFi chip. It also contains a Bluetooth
module which is connected via UART to the host.
It shares lmp subversion with 8703B, so Realtek's userspace
initialization tool (rtk_hciattach) differentiates varieties of RTL8723CS
(CG, VF, XX) with RTL8703B using vendor's command to read chip type.
Also this chip declares support for some features it doesn't support
so add a quirk to indicate that these features are broken.
Signed-off-by: Vasily Khoruzhick <anarsoul@xxxxxxxxx>
---
drivers/bluetooth/btrtl.c | 128 ++++++++++++++++++++++++++++++++++++-
drivers/bluetooth/btrtl.h | 12 ++++
drivers/bluetooth/hci_h5.c | 6 ++
3 files changed, 143 insertions(+), 3 deletions(-)
diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
index 3a9afc905f24..8c7b35abe492 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -17,8 +17,12 @@
#define VERSION "0.1"
+#define RTL_CHIP_8723CS_CG 3
+#define RTL_CHIP_8723CS_VF 4
+#define RTL_CHIP_8723CS_XX 5
#define RTL_EPATCH_SIGNATURE "Realtech"
#define RTL_ROM_LMP_3499 0x3499
+#define RTL_ROM_LMP_8703B 0x8703
#define RTL_ROM_LMP_8723A 0x1200
#define RTL_ROM_LMP_8723B 0x8723
#define RTL_ROM_LMP_8723D 0x8873
@@ -31,6 +35,7 @@
#define IC_MATCH_FL_HCIREV (1 << 1)
#define IC_MATCH_FL_HCIVER (1 << 2)
#define IC_MATCH_FL_HCIBUS (1 << 3)
+#define IC_MATCH_FL_CHIP_TYPE (1 << 4)
#define IC_INFO(lmps, hcir) \
.match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV, \
.lmp_subver = (lmps), \
@@ -42,6 +47,7 @@ struct id_table {
__u16 hci_rev;
__u8 hci_ver;
__u8 hci_bus;
+ __u8 chip_type;
bool config_needed;
bool has_rom_version;
char *fw_name;
@@ -89,6 +95,39 @@ static const struct id_table ic_id_table[] = {
.fw_name = "rtl_bt/rtl8723b_fw.bin",
.cfg_name = "rtl_bt/rtl8723b_config" },
+ /* 8723CS-CG */
+ { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
+ IC_MATCH_FL_HCIBUS,
+ .lmp_subver = RTL_ROM_LMP_8703B,
+ .chip_type = RTL_CHIP_8723CS_CG,
+ .hci_bus = HCI_UART,
+ .config_needed = true,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723cs_cg_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723cs_cg_config" },
+
+ /* 8723CS-VF */
+ { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
+ IC_MATCH_FL_HCIBUS,
+ .lmp_subver = RTL_ROM_LMP_8703B,
+ .chip_type = RTL_CHIP_8723CS_VF,
+ .hci_bus = HCI_UART,
+ .config_needed = true,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723cs_vf_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723cs_vf_config" },
+
+ /* 8723CS-XX */
+ { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
+ IC_MATCH_FL_HCIBUS,
+ .lmp_subver = RTL_ROM_LMP_8703B,
+ .chip_type = RTL_CHIP_8723CS_XX,
+ .hci_bus = HCI_UART,
+ .config_needed = true,
+ .has_rom_version = true,
+ .fw_name = "rtl_bt/rtl8723cs_xx_fw.bin",
+ .cfg_name = "rtl_bt/rtl8723cs_xx_config" },
+
/* 8723D */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xd),
.config_needed = true,
@@ -171,7 +210,8 @@ static const struct id_table ic_id_table[] = {
};
static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
- u8 hci_ver, u8 hci_bus)
+ u8 hci_ver, u8 hci_bus,
+ u8 chip_type)
{
int i;
@@ -188,6 +228,9 @@ static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) &&
(ic_id_table[i].hci_bus != hci_bus))
continue;
+ if ((ic_id_table[i].match_flags & IC_MATCH_FL_CHIP_TYPE) &&
+ (ic_id_table[i].chip_type != chip_type))
+ continue;
break;
}
@@ -270,6 +313,7 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev,
{ RTL_ROM_LMP_8723B, 1 },
{ RTL_ROM_LMP_8821A, 2 },
{ RTL_ROM_LMP_8761A, 3 },
+ { RTL_ROM_LMP_8703B, 7 },
{ RTL_ROM_LMP_8822B, 8 },
{ RTL_ROM_LMP_8723B, 9 }, /* 8723D */
{ RTL_ROM_LMP_8821A, 10 }, /* 8821C */
@@ -545,6 +589,48 @@ static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
return ret;
}
+static bool rtl_has_chip_type(u16 lmp_subver)
+{
+ switch (lmp_subver) {
+ case RTL_ROM_LMP_8703B:
+ return true;
+ default:
+ break;
+ }
+
+ return false;
+}
+
+static int rtl_read_chip_type(struct hci_dev *hdev, u8 *type)
+{
+ struct rtl_chip_type_evt *chip_type;
+ struct sk_buff *skb;
+ const unsigned char cmd_buf[] = {0x00, 0x94, 0xa0, 0x00, 0xb0};
+
+ /* Read RTL chip type command */
+ skb = __hci_cmd_sync(hdev, 0xfc61, 5, cmd_buf, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ rtl_dev_err(hdev, "Read chip type failed (%ld)",
+ PTR_ERR(skb));
+ return PTR_ERR(skb);
+ }
+
+ if (skb->len != sizeof(*chip_type)) {
+ rtl_dev_err(hdev, "RTL chip type event length mismatch");
+ kfree_skb(skb);
+ return -EIO;
+ }
+
+ chip_type = (struct rtl_chip_type_evt *)skb->data;
+ rtl_dev_info(hdev, "chip_type status=%x type=%x",
+ chip_type->status, chip_type->type);
+
+ *type = chip_type->type & 0x0f;
+
+ kfree_skb(skb);
+ return 0;
+}
+
void btrtl_free(struct btrtl_device_info *btrtl_dev)
{
kvfree(btrtl_dev->fw_data);
@@ -561,7 +647,7 @@ struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
struct hci_rp_read_local_version *resp;
char cfg_name[40];
u16 hci_rev, lmp_subver;
- u8 hci_ver;
+ u8 hci_ver, chip_type = 0;
int ret;
btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL);
@@ -586,8 +672,14 @@ struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
lmp_subver = le16_to_cpu(resp->lmp_subver);
kfree_skb(skb);
+ if (rtl_has_chip_type(lmp_subver)) {
+ ret = rtl_read_chip_type(hdev, &chip_type);
+ if (ret)
+ goto err_free;
+ }
+
btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
- hdev->bus);
+ hdev->bus, chip_type);
if (!btrtl_dev->ic_info) {
rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x",
@@ -660,6 +752,7 @@ int btrtl_download_firmware(struct hci_dev *hdev,
case RTL_ROM_LMP_8821A:
case RTL_ROM_LMP_8761A:
case RTL_ROM_LMP_8822B:
+ case RTL_ROM_LMP_8703B:
return btrtl_setup_rtl8723b(hdev, btrtl_dev);
default:
rtl_dev_info(hdev, "assuming no firmware upload needed");
@@ -678,7 +771,12 @@ int btrtl_setup_realtek(struct hci_dev *hdev)
return PTR_ERR(btrtl_dev);
ret = btrtl_download_firmware(hdev, btrtl_dev);
+ if (ret)
+ goto out_free;
+ btrtl_apply_quirks(hdev, btrtl_dev);
+
+out_free:
btrtl_free(btrtl_dev);
/* Enable controller to do both LE scan and BR/EDR inquiry
@@ -818,6 +916,24 @@ int btrtl_get_uart_settings(struct hci_dev *hdev,
}
EXPORT_SYMBOL_GPL(btrtl_get_uart_settings);
+void btrtl_apply_quirks(struct hci_dev *hdev,
+ struct btrtl_device_info *btrtl_dev)
+{
+ switch (btrtl_dev->ic_info->lmp_subver) {
+ case RTL_ROM_LMP_8703B:
+ /* 8723CS reports two pages for local ext features,
+ * but it doesn't support any features from page 2 -
+ * it either responds with garbage or with error status
+ */
+ set_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FTR_MAX_PAGE,
+ &hdev->quirks);
+ break;
+ default:
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(btrtl_apply_quirks);
+
MODULE_AUTHOR("Daniel Drake <drake@xxxxxxxxxxxx>");
MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION);
MODULE_VERSION(VERSION);
@@ -827,6 +943,12 @@ MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin");
MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_cg_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_cg_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_vf_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_vf_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_xx_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8723cs_xx_config.bin");
MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin");
MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin");
diff --git a/drivers/bluetooth/btrtl.h b/drivers/bluetooth/btrtl.h
index 2a582682136d..152ed2ece4c2 100644
--- a/drivers/bluetooth/btrtl.h
+++ b/drivers/bluetooth/btrtl.h
@@ -14,6 +14,11 @@
struct btrtl_device_info;
+struct rtl_chip_type_evt {
+ __u8 status;
+ __u8 type;
+} __packed;
+
struct rtl_download_cmd {
__u8 index;
__u8 data[RTL_FRAG_LEN];
@@ -60,6 +65,8 @@ int btrtl_get_uart_settings(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev,
unsigned int *controller_baudrate,
u32 *device_baudrate, bool *flow_control);
+void btrtl_apply_quirks(struct hci_dev *hdev,
+ struct btrtl_device_info *btrtl_dev);
#else
@@ -96,6 +103,11 @@ static inline int btrtl_get_uart_settings(struct hci_dev *hdev,
bool *flow_control)
{
return -ENOENT;
+
+static inline void btrtl_apply_quirks(struct hci_dev *hdev,
+ struct btrtl_device_info *btrtl_dev)
+{
+}
}
#endif
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index e60b2e0773db..c34acab9e8ac 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -904,6 +904,10 @@ static int h5_btrtl_setup(struct h5 *h5)
err = btrtl_download_firmware(h5->hu->hdev, btrtl_dev);
/* Give the device some time before the hci-core sends it a reset */
usleep_range(10000, 20000);
+ if (err)
+ goto out_free;
+
+ btrtl_apply_quirks(h5->hu->hdev, btrtl_dev);
out_free:
btrtl_free(btrtl_dev);
@@ -1020,6 +1024,8 @@ static const struct of_device_id rtl_bluetooth_of_match[] = {
.data = (const void *)&rtl_vnd },
{ .compatible = "realtek,rtl8723bs-bt",
.data = (const void *)&rtl_vnd },
+ { .compatible = "realtek,rtl8723cs-bt",
+ .data = (const void *)&rtl_vnd },
#endif
{ },
};
--
2.27.0