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btrtl.c
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btrtl.c
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// 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_EPATCH_SIGNATURE_V2 "RTBTCore"
#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 RTL_VSC_OP_COREDUMP 0xfcff
#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)
#define RTL_CHIP_SUBVER (&(struct rtl_vendor_cmd) {{0x10, 0x38, 0x04, 0x28, 0x80}})
#define RTL_CHIP_REV (&(struct rtl_vendor_cmd) {{0x10, 0x3A, 0x04, 0x28, 0x80}})
#define RTL_SEC_PROJ (&(struct rtl_vendor_cmd) {{0x10, 0xA4, 0x0D, 0x00, 0xb0}})
#define RTL_PATCH_SNIPPETS 0x01
#define RTL_PATCH_DUMMY_HEADER 0x02
#define RTL_PATCH_SECURITY_HEADER 0x03
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;
char *hw_info;
};
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;
u8 key_id;
struct list_head patch_subsecs;
};
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",
.cfg_name = NULL,
.hw_info = "rtl8723au" },
/* 8723BS */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723bs_fw",
.cfg_name = "rtl_bt/rtl8723bs_config",
.hw_info = "rtl8723bs" },
/* 8723B */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723b_fw",
.cfg_name = "rtl_bt/rtl8723b_config",
.hw_info = "rtl8723bu" },
/* 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",
.cfg_name = "rtl_bt/rtl8723cs_cg_config",
.hw_info = "rtl8723cs-cg" },
/* 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",
.cfg_name = "rtl_bt/rtl8723cs_vf_config",
.hw_info = "rtl8723cs-vf" },
/* 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",
.cfg_name = "rtl_bt/rtl8723cs_xx_config",
.hw_info = "rtl8723cs" },
/* 8723D */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_USB),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723d_fw",
.cfg_name = "rtl_bt/rtl8723d_config",
.hw_info = "rtl8723du" },
/* 8723DS */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723ds_fw",
.cfg_name = "rtl_bt/rtl8723ds_config",
.hw_info = "rtl8723ds" },
/* 8821A */
{ IC_INFO(RTL_ROM_LMP_8821A, 0xa, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8821a_fw",
.cfg_name = "rtl_bt/rtl8821a_config",
.hw_info = "rtl8821au" },
/* 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",
.cfg_name = "rtl_bt/rtl8821c_config",
.hw_info = "rtl8821cu" },
/* 8821CS */
{ IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8821cs_fw",
.cfg_name = "rtl_bt/rtl8821cs_config",
.hw_info = "rtl8821cs" },
/* 8761A */
{ IC_INFO(RTL_ROM_LMP_8761A, 0xa, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8761a_fw",
.cfg_name = "rtl_bt/rtl8761a_config",
.hw_info = "rtl8761au" },
/* 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",
.cfg_name = "rtl_bt/rtl8761b_config",
.hw_info = "rtl8761btv" },
/* 8761BU */
{ IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8761bu_fw",
.cfg_name = "rtl_bt/rtl8761bu_config",
.hw_info = "rtl8761bu" },
/* 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",
.cfg_name = "rtl_bt/rtl8822cs_config",
.hw_info = "rtl8822cs" },
/* 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",
.cfg_name = "rtl_bt/rtl8822cs_config",
.hw_info = "rtl8822cs" },
/* 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",
.cfg_name = "rtl_bt/rtl8822cu_config",
.hw_info = "rtl8822cu" },
/* 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",
.cfg_name = "rtl_bt/rtl8822b_config",
.hw_info = "rtl8822bu" },
/* 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",
.cfg_name = "rtl_bt/rtl8852au_config",
.hw_info = "rtl8852au" },
/* 8852B with UART interface */
{ IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8852bs_fw",
.cfg_name = "rtl_bt/rtl8852bs_config",
.hw_info = "rtl8852bs" },
/* 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",
.cfg_name = "rtl_bt/rtl8852bu_config",
.hw_info = "rtl8852bu" },
/* 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",
.cfg_name = "rtl_bt/rtl8852cu_config",
.hw_info = "rtl8852cu" },
/* 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",
.cfg_name = "rtl_bt/rtl8851bu_config",
.hw_info = "rtl8851bu" },
};
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 btrtl_vendor_read_reg16(struct hci_dev *hdev,
struct rtl_vendor_cmd *cmd, u8 *rp)
{
struct sk_buff *skb;
int err = 0;
skb = __hci_cmd_sync(hdev, 0xfc61, sizeof(*cmd), cmd,
HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
rtl_dev_err(hdev, "RTL: Read reg16 failed (%d)", err);
return err;
}
if (skb->len != 3 || skb->data[0]) {
bt_dev_err(hdev, "RTL: Read reg16 length mismatch");
kfree_skb(skb);
return -EIO;
}
if (rp)
memcpy(rp, skb->data + 1, 2);
kfree_skb(skb);
return 0;
}
static void *rtl_iov_pull_data(struct rtl_iovec *iov, u32 len)
{
void *data = iov->data;
if (iov->len < len)
return NULL;
iov->data += len;
iov->len -= len;
return data;
}
static void btrtl_insert_ordered_subsec(struct rtl_subsection *node,
struct btrtl_device_info *btrtl_dev)
{
struct list_head *pos;
struct list_head *next;
struct rtl_subsection *subsec;
list_for_each_safe(pos, next, &btrtl_dev->patch_subsecs) {
subsec = list_entry(pos, struct rtl_subsection, list);
if (subsec->prio >= node->prio)
break;
}
__list_add(&node->list, pos->prev, pos);
}
static int btrtl_parse_section(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev, u32 opcode,
u8 *data, u32 len)
{
struct rtl_section_hdr *hdr;
struct rtl_subsection *subsec;
struct rtl_common_subsec *common_subsec;
struct rtl_sec_hdr *sec_hdr;
int i;
u8 *ptr;
u16 num_subsecs;
u32 subsec_len;
int rc = 0;
struct rtl_iovec iov = {
.data = data,
.len = len,
};
hdr = rtl_iov_pull_data(&iov, sizeof(*hdr));
if (!hdr)
return -EINVAL;
num_subsecs = le16_to_cpu(hdr->num);
for (i = 0; i < num_subsecs; i++) {
common_subsec = rtl_iov_pull_data(&iov, sizeof(*common_subsec));
if (!common_subsec)
break;
subsec_len = le32_to_cpu(common_subsec->len);
rtl_dev_dbg(hdev, "subsec, eco 0x%02x, len %08x",
common_subsec->eco, subsec_len);
ptr = rtl_iov_pull_data(&iov, subsec_len);
if (!ptr)
break;
if (common_subsec->eco != btrtl_dev->rom_version + 1)
continue;
switch (opcode) {
case RTL_PATCH_SECURITY_HEADER:
sec_hdr = (void *)common_subsec;
if (sec_hdr->key_id != btrtl_dev->key_id)
continue;
break;
}
subsec = kzalloc(sizeof(*subsec), GFP_KERNEL);
if (!subsec)
return -ENOMEM;
subsec->opcode = opcode;
subsec->prio = common_subsec->prio;
subsec->len = subsec_len;
subsec->data = ptr;
btrtl_insert_ordered_subsec(subsec, btrtl_dev);
rc += subsec_len;
}
return rc;
}
static int rtlbt_parse_firmware_v2(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev,
unsigned char **_buf)
{
struct rtl_epatch_header_v2 *hdr;
int rc;
u8 reg_val[2];
u8 key_id;
u32 num_sections;
struct rtl_section *section;
struct rtl_subsection *entry, *tmp;
u32 section_len;
u32 opcode;
int len = 0;
int i;
u8 *ptr;
struct rtl_iovec iov = {
.data = btrtl_dev->fw_data,
.len = btrtl_dev->fw_len - 7, /* Cut the tail */
};
rc = btrtl_vendor_read_reg16(hdev, RTL_SEC_PROJ, reg_val);
if (rc < 0)
return -EIO;
key_id = reg_val[0];
rtl_dev_dbg(hdev, "%s: key id %u", __func__, key_id);
btrtl_dev->key_id = key_id;
hdr = rtl_iov_pull_data(&iov, sizeof(*hdr));
if (!hdr)
return -EINVAL;
num_sections = le32_to_cpu(hdr->num_sections);
rtl_dev_dbg(hdev, "FW version %08x-%08x", *((u32 *)hdr->fw_version),
*((u32 *)(hdr->fw_version + 4)));
for (i = 0; i < num_sections; i++) {
section = rtl_iov_pull_data(&iov, sizeof(*section));
if (!section)
break;
section_len = le32_to_cpu(section->len);
opcode = le32_to_cpu(section->opcode);
rtl_dev_dbg(hdev, "opcode 0x%04x", section->opcode);
ptr = rtl_iov_pull_data(&iov, section_len);
if (!ptr)
break;
switch (opcode) {
case RTL_PATCH_SNIPPETS:
rc = btrtl_parse_section(hdev, btrtl_dev, opcode,
ptr, section_len);
break;
case RTL_PATCH_SECURITY_HEADER:
/* If key_id from chip is zero, ignore all security
* headers.
*/
if (!key_id)
break;
rc = btrtl_parse_section(hdev, btrtl_dev, opcode,
ptr, section_len);
break;
case RTL_PATCH_DUMMY_HEADER:
rc = btrtl_parse_section(hdev, btrtl_dev, opcode,
ptr, section_len);
break;
default:
rc = 0;
break;
}
if (rc < 0) {
rtl_dev_err(hdev, "RTL: Parse section (%u) err %d",
opcode, rc);
return rc;
}
len += rc;
}
if (!len)
return -ENODATA;
/* Allocate mem and copy all found subsecs. */
ptr = kvmalloc(len, GFP_KERNEL);
if (!ptr)
return -ENOMEM;
len = 0;
list_for_each_entry_safe(entry, tmp, &btrtl_dev->patch_subsecs, list) {
rtl_dev_dbg(hdev, "RTL: opcode %08x, addr %p, len 0x%x",
entry->opcode, entry->data, entry->len);
memcpy(ptr + len, entry->data, entry->len);
len += entry->len;
}
if (!len)
return -EPERM;
*_buf = ptr;
return len;
}
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 btrealtek_data *coredump_info = hci_get_priv(hdev);
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 */
};
if (btrtl_dev->fw_len <= 8)
return -EINVAL;
if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8))
min_size = sizeof(struct rtl_epatch_header) +
sizeof(extension_sig) + 3;
else if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE_V2, 8))
min_size = sizeof(struct rtl_epatch_header_v2) +
sizeof(extension_sig) + 3;
else
return -EINVAL;
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;
}
if (memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8) != 0) {
if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE_V2, 8))
return rtlbt_parse_firmware_v2(hdev, btrtl_dev, _buf);
rtl_dev_err(hdev, "bad EPATCH signature");
return -EINVAL;
}
epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data;
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);
coredump_info->rtl_dump.fw_version = le32_to_cpu(epatch_info->fw_version);
/* 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;
int j = 0;
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;
dl_cmd->index = j++;
if (dl_cmd->index == 0x7f)
j = 1;
if (i == (frag_num - 1)) {
dl_cmd->index |= 0x80; /* data end */
frag_len = fw_len % RTL_FRAG_LEN;
}
rtl_dev_dbg(hdev, "download fw (%d/%d). index = %d", i,
frag_num, dl_cmd->index);
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 void btrtl_coredump(struct hci_dev *hdev)
{
static const u8 param[] = { 0x00, 0x00 };
__hci_cmd_send(hdev, RTL_VSC_OP_COREDUMP, sizeof(param), param);
}
static void btrtl_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb)
{
struct btrealtek_data *coredump_info = hci_get_priv(hdev);
char buf[80];
if (coredump_info->rtl_dump.controller)
snprintf(buf, sizeof(buf), "Controller Name: %s\n",
coredump_info->rtl_dump.controller);
else
snprintf(buf, sizeof(buf), "Controller Name: Unknown\n");
skb_put_data(skb, buf, strlen(buf));
snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n",
coredump_info->rtl_dump.fw_version);
skb_put_data(skb, buf, strlen(buf));
snprintf(buf, sizeof(buf), "Driver: %s\n", coredump_info->rtl_dump.driver_name);
skb_put_data(skb, buf, strlen(buf));
snprintf(buf, sizeof(buf), "Vendor: Realtek\n");
skb_put_data(skb, buf, strlen(buf));
}
static void btrtl_register_devcoredump_support(struct hci_dev *hdev)
{
hci_devcd_register(hdev, btrtl_coredump, btrtl_dmp_hdr, NULL);
}
void btrtl_set_driver_name(struct hci_dev *hdev, const char *driver_name)
{
struct btrealtek_data *coredump_info = hci_get_priv(hdev);
coredump_info->rtl_dump.driver_name = driver_name;
}
EXPORT_SYMBOL_GPL(btrtl_set_driver_name);
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)",