Re: [PATCH 2/3] Bluetooth: btrtl: add support for the RTL8723CS

From: Marcel Holtmann
Date: Tue Jul 07 2020 - 12:01:38 EST

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In reply to: Vasily Khoruzhick: "[PATCH 2/3] Bluetooth: btrtl: add support for the RTL8723CS"
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Hi Vasily,

> 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)
> +{
> +}
> }

this hunk is fundamentally broken.

Regards

Marcel

Next message: Steven Rostedt: "Re: [PATCH v2 2/2] kbuild: trace functions in subdirectories of lib/"
Previous message: Greg Kroah-Hartman: "Re: [PATCH v3 1/1] power: Emit changed uevent on wakeup_sysfs_add/remove"
In reply to: Vasily Khoruzhick: "[PATCH 2/3] Bluetooth: btrtl: add support for the RTL8723CS"
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