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linuxdebug/drivers/bluetooth/btrtl.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Bluetooth support for Realtek devices
*
* Copyright (C) 2015 Endless Mobile, Inc.
*/
#include <linux/module.h>
#include <linux/firmware.h>
#include <asm/unaligned.h>
#include <linux/usb.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "btrtl.h"
#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_8703B 0x8703
#define RTL_ROM_LMP_8723A 0x1200
#define RTL_ROM_LMP_8723B 0x8723
#define RTL_ROM_LMP_8821A 0x8821
#define RTL_ROM_LMP_8761A 0x8761
#define RTL_ROM_LMP_8822B 0x8822
#define RTL_ROM_LMP_8852A 0x8852
#define RTL_ROM_LMP_8851B 0x8851
#define RTL_CONFIG_MAGIC 0x8723ab55
#define IC_MATCH_FL_LMPSUBV (1 << 0)
#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, hciv, bus) \
.match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV | \
IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS, \
.lmp_subver = (lmps), \
.hci_rev = (hcir), \
.hci_ver = (hciv), \
.hci_bus = (bus)
enum btrtl_chip_id {
CHIP_ID_8723A,
CHIP_ID_8723B,
CHIP_ID_8821A,
CHIP_ID_8761A,
CHIP_ID_8822B = 8,
CHIP_ID_8723D,
CHIP_ID_8821C,
CHIP_ID_8822C = 13,
CHIP_ID_8761B,
CHIP_ID_8852A = 18,
CHIP_ID_8852B = 20,
CHIP_ID_8852C = 25,
CHIP_ID_8851B = 36,
};
struct id_table {
__u16 match_flags;
__u16 lmp_subver;
__u16 hci_rev;
__u8 hci_ver;
__u8 hci_bus;
__u8 chip_type;
bool config_needed;
bool has_rom_version;
bool has_msft_ext;
char *fw_name;
char *cfg_name;
};
struct btrtl_device_info {
const struct id_table *ic_info;
u8 rom_version;
u8 *fw_data;
int fw_len;
u8 *cfg_data;
int cfg_len;
bool drop_fw;
int project_id;
};
static const struct id_table ic_id_table[] = {
/* 8723A */
{ IC_INFO(RTL_ROM_LMP_8723A, 0xb, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = false,
.fw_name = "rtl_bt/rtl8723a_fw.bin",
.cfg_name = NULL },
/* 8723BS */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723bs_fw.bin",
.cfg_name = "rtl_bt/rtl8723bs_config" },
/* 8723B */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.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, 0x8, HCI_USB),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723d_fw.bin",
.cfg_name = "rtl_bt/rtl8723d_config" },
/* 8723DS */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723ds_fw.bin",
.cfg_name = "rtl_bt/rtl8723ds_config" },
/* 8821A */
{ IC_INFO(RTL_ROM_LMP_8821A, 0xa, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8821a_fw.bin",
.cfg_name = "rtl_bt/rtl8821a_config" },
/* 8821C */
{ IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8821c_fw.bin",
.cfg_name = "rtl_bt/rtl8821c_config" },
/* 8761A */
{ IC_INFO(RTL_ROM_LMP_8761A, 0xa, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8761a_fw.bin",
.cfg_name = "rtl_bt/rtl8761a_config" },
/* 8761B */
{ IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_UART),
.config_needed = false,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8761b_fw.bin",
.cfg_name = "rtl_bt/rtl8761b_config" },
/* 8761BU */
{ IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8761bu_fw.bin",
.cfg_name = "rtl_bt/rtl8761bu_config" },
/* 8822C with UART interface */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0x8, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8822cs_fw.bin",
.cfg_name = "rtl_bt/rtl8822cs_config" },
/* 8822C with UART interface */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8822cs_fw.bin",
.cfg_name = "rtl_bt/rtl8822cs_config" },
/* 8822C with USB interface */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8822cu_fw.bin",
.cfg_name = "rtl_bt/rtl8822cu_config" },
/* 8822B */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xb, 0x7, HCI_USB),
.config_needed = true,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8822b_fw.bin",
.cfg_name = "rtl_bt/rtl8822b_config" },
/* 8852A */
{ IC_INFO(RTL_ROM_LMP_8852A, 0xa, 0xb, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8852au_fw.bin",
.cfg_name = "rtl_bt/rtl8852au_config" },
/* 8852B */
{ IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8852bu_fw.bin",
.cfg_name = "rtl_bt/rtl8852bu_config" },
/* 8852C */
{ IC_INFO(RTL_ROM_LMP_8852A, 0xc, 0xc, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8852cu_fw.bin",
.cfg_name = "rtl_bt/rtl8852cu_config" },
/* 8851B */
{ IC_INFO(RTL_ROM_LMP_8851B, 0xb, 0xc, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.has_msft_ext = false,
.fw_name = "rtl_bt/rtl8851bu_fw.bin",
.cfg_name = "rtl_bt/rtl8851bu_config" },
};
static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
u8 hci_ver, u8 hci_bus,
u8 chip_type)
{
int i;
for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) {
if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) &&
(ic_id_table[i].lmp_subver != lmp_subver))
continue;
if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) &&
(ic_id_table[i].hci_rev != hci_rev))
continue;
if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) &&
(ic_id_table[i].hci_ver != hci_ver))
continue;
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;
}
if (i >= ARRAY_SIZE(ic_id_table))
return NULL;
return &ic_id_table[i];
}
static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev)
{
struct sk_buff *skb;
skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION failed (%ld)",
PTR_ERR(skb));
return skb;
}
if (skb->len != sizeof(struct hci_rp_read_local_version)) {
rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION event length mismatch");
kfree_skb(skb);
return ERR_PTR(-EIO);
}
return skb;
}
static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
{
struct rtl_rom_version_evt *rom_version;
struct sk_buff *skb;
/* Read RTL ROM version command */
skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
rtl_dev_err(hdev, "Read ROM version failed (%ld)",
PTR_ERR(skb));
return PTR_ERR(skb);
}
if (skb->len != sizeof(*rom_version)) {
rtl_dev_err(hdev, "version event length mismatch");
kfree_skb(skb);
return -EIO;
}
rom_version = (struct rtl_rom_version_evt *)skb->data;
rtl_dev_info(hdev, "rom_version status=%x version=%x",
rom_version->status, rom_version->version);
*version = rom_version->version;
kfree_skb(skb);
return 0;
}
static int rtlbt_parse_firmware(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev,
unsigned char **_buf)
{
static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
struct rtl_epatch_header *epatch_info;
unsigned char *buf;
int i, len;
size_t min_size;
u8 opcode, length, data;
int project_id = -1;
const unsigned char *fwptr, *chip_id_base;
const unsigned char *patch_length_base, *patch_offset_base;
u32 patch_offset = 0;
u16 patch_length, num_patches;
static const struct {
__u16 lmp_subver;
__u8 id;
} project_id_to_lmp_subver[] = {
{ RTL_ROM_LMP_8723A, 0 },
{ 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 */
{ RTL_ROM_LMP_8822B, 13 }, /* 8822C */
{ RTL_ROM_LMP_8761A, 14 }, /* 8761B */
{ RTL_ROM_LMP_8852A, 18 }, /* 8852A */
{ RTL_ROM_LMP_8852A, 20 }, /* 8852B */
{ RTL_ROM_LMP_8852A, 25 }, /* 8852C */
{ RTL_ROM_LMP_8851B, 36 }, /* 8851B */
};
min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3;
if (btrtl_dev->fw_len < min_size)
return -EINVAL;
fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig);
if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
rtl_dev_err(hdev, "extension section signature mismatch");
return -EINVAL;
}
/* Loop from the end of the firmware parsing instructions, until
* we find an instruction that identifies the "project ID" for the
* hardware supported by this firwmare file.
* Once we have that, we double-check that project_id is suitable
* for the hardware we are working with.
*/
while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) {
opcode = *--fwptr;
length = *--fwptr;
data = *--fwptr;
BT_DBG("check op=%x len=%x data=%x", opcode, length, data);
if (opcode == 0xff) /* EOF */
break;
if (length == 0) {
rtl_dev_err(hdev, "found instruction with length 0");
return -EINVAL;
}
if (opcode == 0 && length == 1) {
project_id = data;
break;
}
fwptr -= length;
}
if (project_id < 0) {
rtl_dev_err(hdev, "failed to find version instruction");
return -EINVAL;
}
/* Find project_id in table */
for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) {
if (project_id == project_id_to_lmp_subver[i].id) {
btrtl_dev->project_id = project_id;
break;
}
}
if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) {
rtl_dev_err(hdev, "unknown project id %d", project_id);
return -EINVAL;
}
if (btrtl_dev->ic_info->lmp_subver !=
project_id_to_lmp_subver[i].lmp_subver) {
rtl_dev_err(hdev, "firmware is for %x but this is a %x",
project_id_to_lmp_subver[i].lmp_subver,
btrtl_dev->ic_info->lmp_subver);
return -EINVAL;
}
epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data;
if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) {
rtl_dev_err(hdev, "bad EPATCH signature");
return -EINVAL;
}
num_patches = le16_to_cpu(epatch_info->num_patches);
BT_DBG("fw_version=%x, num_patches=%d",
le32_to_cpu(epatch_info->fw_version), num_patches);
/* After the rtl_epatch_header there is a funky patch metadata section.
* Assuming 2 patches, the layout is:
* ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2
*
* Find the right patch for this chip.
*/
min_size += 8 * num_patches;
if (btrtl_dev->fw_len < min_size)
return -EINVAL;
chip_id_base = btrtl_dev->fw_data + sizeof(struct rtl_epatch_header);
patch_length_base = chip_id_base + (sizeof(u16) * num_patches);
patch_offset_base = patch_length_base + (sizeof(u16) * num_patches);
for (i = 0; i < num_patches; i++) {
u16 chip_id = get_unaligned_le16(chip_id_base +
(i * sizeof(u16)));
if (chip_id == btrtl_dev->rom_version + 1) {
patch_length = get_unaligned_le16(patch_length_base +
(i * sizeof(u16)));
patch_offset = get_unaligned_le32(patch_offset_base +
(i * sizeof(u32)));
break;
}
}
if (!patch_offset) {
rtl_dev_err(hdev, "didn't find patch for chip id %d",
btrtl_dev->rom_version);
return -EINVAL;
}
BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i);
min_size = patch_offset + patch_length;
if (btrtl_dev->fw_len < min_size)
return -EINVAL;
/* Copy the firmware into a new buffer and write the version at
* the end.
*/
len = patch_length;
buf = kvmalloc(patch_length, GFP_KERNEL);
if (!buf)
return -ENOMEM;
memcpy(buf, btrtl_dev->fw_data + patch_offset, patch_length - 4);
memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4);
*_buf = buf;
return len;
}
static int rtl_download_firmware(struct hci_dev *hdev,
const unsigned char *data, int fw_len)
{
struct rtl_download_cmd *dl_cmd;
int frag_num = fw_len / RTL_FRAG_LEN + 1;
int frag_len = RTL_FRAG_LEN;
int ret = 0;
int i;
struct sk_buff *skb;
struct hci_rp_read_local_version *rp;
dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL);
if (!dl_cmd)
return -ENOMEM;
for (i = 0; i < frag_num; i++) {
struct sk_buff *skb;
BT_DBG("download fw (%d/%d)", i, frag_num);
if (i > 0x7f)
dl_cmd->index = (i & 0x7f) + 1;
else
dl_cmd->index = i;
if (i == (frag_num - 1)) {
dl_cmd->index |= 0x80; /* data end */
frag_len = fw_len % RTL_FRAG_LEN;
}
memcpy(dl_cmd->data, data, frag_len);
/* Send download command */
skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd,
HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
rtl_dev_err(hdev, "download fw command failed (%ld)",
PTR_ERR(skb));
ret = PTR_ERR(skb);
goto out;
}
if (skb->len != sizeof(struct rtl_download_response)) {
rtl_dev_err(hdev, "download fw event length mismatch");
kfree_skb(skb);
ret = -EIO;
goto out;
}
kfree_skb(skb);
data += RTL_FRAG_LEN;
}
skb = btrtl_read_local_version(hdev);
if (IS_ERR(skb)) {
ret = PTR_ERR(skb);
rtl_dev_err(hdev, "read local version failed");
goto out;
}
rp = (struct hci_rp_read_local_version *)skb->data;
rtl_dev_info(hdev, "fw version 0x%04x%04x",
__le16_to_cpu(rp->hci_rev), __le16_to_cpu(rp->lmp_subver));
kfree_skb(skb);
out:
kfree(dl_cmd);
return ret;
}
static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff)
{
const struct firmware *fw;
int ret;
rtl_dev_info(hdev, "loading %s", name);
ret = request_firmware(&fw, name, &hdev->dev);
if (ret < 0)
return ret;
ret = fw->size;
*buff = kvmalloc(fw->size, GFP_KERNEL);
if (*buff)
memcpy(*buff, fw->data, ret);
else
ret = -ENOMEM;
release_firmware(fw);
return ret;
}
static int btrtl_setup_rtl8723a(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev)
{
if (btrtl_dev->fw_len < 8)
return -EINVAL;
/* Check that the firmware doesn't have the epatch signature
* (which is only for RTL8723B and newer).
*/
if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) {
rtl_dev_err(hdev, "unexpected EPATCH signature!");
return -EINVAL;
}
return rtl_download_firmware(hdev, btrtl_dev->fw_data,
btrtl_dev->fw_len);
}
static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev)
{
unsigned char *fw_data = NULL;
int ret;
u8 *tbuff;
ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data);
if (ret < 0)
goto out;
if (btrtl_dev->cfg_len > 0) {
tbuff = kvzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL);
if (!tbuff) {
ret = -ENOMEM;
goto out;
}
memcpy(tbuff, fw_data, ret);
kvfree(fw_data);
memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len);
ret += btrtl_dev->cfg_len;
fw_data = tbuff;
}
rtl_dev_info(hdev, "cfg_sz %d, total sz %d", btrtl_dev->cfg_len, ret);
ret = rtl_download_firmware(hdev, fw_data, ret);
out:
kvfree(fw_data);
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);
}
chip_type = skb_pull_data(skb, sizeof(*chip_type));
if (!chip_type) {
rtl_dev_err(hdev, "RTL chip type event length mismatch");
kfree_skb(skb);
return -EIO;
}
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);
kvfree(btrtl_dev->cfg_data);
kfree(btrtl_dev);
}
EXPORT_SYMBOL_GPL(btrtl_free);
struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
const char *postfix)
{
struct btrtl_device_info *btrtl_dev;
struct sk_buff *skb;
struct hci_rp_read_local_version *resp;
char cfg_name[40];
u16 hci_rev, lmp_subver;
u8 hci_ver, chip_type = 0;
int ret;
u16 opcode;
u8 cmd[2];
btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL);
if (!btrtl_dev) {
ret = -ENOMEM;
goto err_alloc;
}
skb = btrtl_read_local_version(hdev);
if (IS_ERR(skb)) {
ret = PTR_ERR(skb);
goto err_free;
}
resp = (struct hci_rp_read_local_version *)skb->data;
rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x",
resp->hci_ver, resp->hci_rev,
resp->lmp_ver, resp->lmp_subver);
hci_ver = resp->hci_ver;
hci_rev = le16_to_cpu(resp->hci_rev);
lmp_subver = le16_to_cpu(resp->lmp_subver);
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, chip_type);
if (!btrtl_dev->ic_info)
btrtl_dev->drop_fw = true;
if (btrtl_dev->drop_fw) {
opcode = hci_opcode_pack(0x3f, 0x66);
cmd[0] = opcode & 0xff;
cmd[1] = opcode >> 8;
skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
if (!skb)
goto out_free;
skb_put_data(skb, cmd, sizeof(cmd));
hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
hdev->send(hdev, skb);
/* Ensure the above vendor command is sent to controller and
* process has done.
*/
msleep(200);
/* Read the local version again. Expect to have the vanilla
* version as cold boot.
*/
skb = btrtl_read_local_version(hdev);
if (IS_ERR(skb)) {
ret = PTR_ERR(skb);
goto err_free;
}
resp = (struct hci_rp_read_local_version *)skb->data;
rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x",
resp->hci_ver, resp->hci_rev,
resp->lmp_ver, resp->lmp_subver);
hci_ver = resp->hci_ver;
hci_rev = le16_to_cpu(resp->hci_rev);
lmp_subver = le16_to_cpu(resp->lmp_subver);
btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
hdev->bus, chip_type);
}
out_free:
kfree_skb(skb);
if (!btrtl_dev->ic_info) {
rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x",
lmp_subver, hci_rev, hci_ver);
return btrtl_dev;
}
if (btrtl_dev->ic_info->has_rom_version) {
ret = rtl_read_rom_version(hdev, &btrtl_dev->rom_version);
if (ret)
goto err_free;
}
btrtl_dev->fw_len = rtl_load_file(hdev, btrtl_dev->ic_info->fw_name,
&btrtl_dev->fw_data);
if (btrtl_dev->fw_len < 0) {
rtl_dev_err(hdev, "firmware file %s not found",
btrtl_dev->ic_info->fw_name);
ret = btrtl_dev->fw_len;
goto err_free;
}
if (btrtl_dev->ic_info->cfg_name) {
if (postfix) {
snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin",
btrtl_dev->ic_info->cfg_name, postfix);
} else {
snprintf(cfg_name, sizeof(cfg_name), "%s.bin",
btrtl_dev->ic_info->cfg_name);
}
btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name,
&btrtl_dev->cfg_data);
if (btrtl_dev->ic_info->config_needed &&
btrtl_dev->cfg_len <= 0) {
rtl_dev_err(hdev, "mandatory config file %s not found",
btrtl_dev->ic_info->cfg_name);
ret = btrtl_dev->cfg_len;
goto err_free;
}
}
/* The following chips supports the Microsoft vendor extension,
* therefore set the corresponding VsMsftOpCode.
*/
if (btrtl_dev->ic_info->has_msft_ext)
hci_set_msft_opcode(hdev, 0xFCF0);
return btrtl_dev;
err_free:
btrtl_free(btrtl_dev);
err_alloc:
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(btrtl_initialize);
int btrtl_download_firmware(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev)
{
/* Match a set of subver values that correspond to stock firmware,
* which is not compatible with standard btusb.
* If matched, upload an alternative firmware that does conform to
* standard btusb. Once that firmware is uploaded, the subver changes
* to a different value.
*/
if (!btrtl_dev->ic_info) {
rtl_dev_info(hdev, "assuming no firmware upload needed");
return 0;
}
switch (btrtl_dev->ic_info->lmp_subver) {
case RTL_ROM_LMP_8723A:
return btrtl_setup_rtl8723a(hdev, btrtl_dev);
case RTL_ROM_LMP_8723B:
case RTL_ROM_LMP_8821A:
case RTL_ROM_LMP_8761A:
case RTL_ROM_LMP_8822B:
case RTL_ROM_LMP_8852A:
case RTL_ROM_LMP_8703B:
case RTL_ROM_LMP_8851B:
return btrtl_setup_rtl8723b(hdev, btrtl_dev);
default:
rtl_dev_info(hdev, "assuming no firmware upload needed");
return 0;
}
}
EXPORT_SYMBOL_GPL(btrtl_download_firmware);
void btrtl_set_quirks(struct hci_dev *hdev, struct btrtl_device_info *btrtl_dev)
{
/* Enable controller to do both LE scan and BR/EDR inquiry
* simultaneously.
*/
set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
/* Enable central-peripheral role (able to create new connections with
* an existing connection in slave role).
*/
/* Enable WBS supported for the specific Realtek devices. */
switch (btrtl_dev->project_id) {
case CHIP_ID_8822C:
case CHIP_ID_8852A:
case CHIP_ID_8852B:
case CHIP_ID_8852C:
case CHIP_ID_8851B:
set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
hci_set_aosp_capable(hdev);
break;
default:
rtl_dev_dbg(hdev, "Central-peripheral role not enabled.");
rtl_dev_dbg(hdev, "WBS supported not enabled.");
break;
}
if (!btrtl_dev->ic_info)
return;
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_FEATURES_PAGE_2,
&hdev->quirks);
break;
default:
break;
}
}
EXPORT_SYMBOL_GPL(btrtl_set_quirks);
int btrtl_setup_realtek(struct hci_dev *hdev)
{
struct btrtl_device_info *btrtl_dev;
int ret;
btrtl_dev = btrtl_initialize(hdev, NULL);
if (IS_ERR(btrtl_dev))
return PTR_ERR(btrtl_dev);
ret = btrtl_download_firmware(hdev, btrtl_dev);
btrtl_set_quirks(hdev, btrtl_dev);
btrtl_free(btrtl_dev);
return ret;
}
EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
int btrtl_shutdown_realtek(struct hci_dev *hdev)
{
struct sk_buff *skb;
int ret;
/* According to the vendor driver, BT must be reset on close to avoid
* firmware crash.
*/
skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
ret = PTR_ERR(skb);
bt_dev_err(hdev, "HCI reset during shutdown failed");
return ret;
}
kfree_skb(skb);
return 0;
}
EXPORT_SYMBOL_GPL(btrtl_shutdown_realtek);
static unsigned int btrtl_convert_baudrate(u32 device_baudrate)
{
switch (device_baudrate) {
case 0x0252a00a:
return 230400;
case 0x05f75004:
return 921600;
case 0x00005004:
return 1000000;
case 0x04928002:
case 0x01128002:
return 1500000;
case 0x00005002:
return 2000000;
case 0x0000b001:
return 2500000;
case 0x04928001:
return 3000000;
case 0x052a6001:
return 3500000;
case 0x00005001:
return 4000000;
case 0x0252c014:
default:
return 115200;
}
}
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)
{
struct rtl_vendor_config *config;
struct rtl_vendor_config_entry *entry;
int i, total_data_len;
bool found = false;
total_data_len = btrtl_dev->cfg_len - sizeof(*config);
if (total_data_len <= 0) {
rtl_dev_warn(hdev, "no config loaded");
return -EINVAL;
}
config = (struct rtl_vendor_config *)btrtl_dev->cfg_data;
if (le32_to_cpu(config->signature) != RTL_CONFIG_MAGIC) {
rtl_dev_err(hdev, "invalid config magic");
return -EINVAL;
}
if (total_data_len < le16_to_cpu(config->total_len)) {
rtl_dev_err(hdev, "config is too short");
return -EINVAL;
}
for (i = 0; i < total_data_len; ) {
entry = ((void *)config->entry) + i;
switch (le16_to_cpu(entry->offset)) {
case 0xc:
if (entry->len < sizeof(*device_baudrate)) {
rtl_dev_err(hdev, "invalid UART config entry");
return -EINVAL;
}
*device_baudrate = get_unaligned_le32(entry->data);
*controller_baudrate = btrtl_convert_baudrate(
*device_baudrate);
if (entry->len >= 13)
*flow_control = !!(entry->data[12] & BIT(2));
else
*flow_control = false;
found = true;
break;
default:
rtl_dev_dbg(hdev, "skipping config entry 0x%x (len %u)",
le16_to_cpu(entry->offset), entry->len);
break;
}
i += sizeof(*entry) + entry->len;
}
if (!found) {
rtl_dev_err(hdev, "no UART config entry found");
return -ENOENT;
}
rtl_dev_dbg(hdev, "device baudrate = 0x%08x", *device_baudrate);
rtl_dev_dbg(hdev, "controller baudrate = %u", *controller_baudrate);
rtl_dev_dbg(hdev, "flow control %d", *flow_control);
return 0;
}
EXPORT_SYMBOL_GPL(btrtl_get_uart_settings);
MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>");
MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin");
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");
MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin");
MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin");
MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin");
MODULE_FIRMWARE("rtl_bt/rtl8852au_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8852au_config.bin");
MODULE_FIRMWARE("rtl_bt/rtl8852bu_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8852bu_config.bin");
MODULE_FIRMWARE("rtl_bt/rtl8852cu_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8852cu_config.bin");
MODULE_FIRMWARE("rtl_bt/rtl8851bu_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8851bu_config.bin");