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Merge "Bluetooth: btrtl: split the device initialization into smaller parts" into odroidg12-4.9.y-android

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This commit is contained in:
Chris
2020-11-09 16:16:55 +09:00
committed by Gerrit Code Review
parent 5cf810c0f2 9dd53ee7a3
commit 5ccd5b3715
2 changed files with 203 additions and 110 deletions
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287
drivers/bluetooth/btrtl.c
View File

@@ -47,48 +47,96 @@ struct id_table {
__u16 lmp_subver;
__u16 hci_rev;
bool config_needed;
bool has_rom_version;
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;
};
static const struct id_table ic_id_table[] = {
{ IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_8723A, 0x0,
.config_needed = false,
.has_rom_version = false,
.fw_name = "rtl_bt/rtl8723a_fw.bin",
.cfg_name = NULL },
{ IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_3499, 0x0,
.config_needed = false,
.has_rom_version = false,
.fw_name = "rtl_bt/rtl8723a_fw.bin",
.cfg_name = NULL },
/* 8723B */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xb),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723b_fw.bin",
.cfg_name = "rtl_bt/rtl8723b_config.bin" },
/* 8723D */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xd),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723d_fw.bin",
.cfg_name = "rtl_bt/rtl8723d_config.bin" },
/* 8821A */
{ IC_INFO(RTL_ROM_LMP_8821A, 0xa),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8821a_fw.bin",
.cfg_name = "rtl_bt/rtl8821a_config.bin" },
/* 8821C */
{ IC_INFO(RTL_ROM_LMP_8821A, 0xc),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8821c_fw.bin",
.cfg_name = "rtl_bt/rtl8821c_config.bin" },
/* 8761A */
{ IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_8761A, 0x0,
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8761a_fw.bin",
.cfg_name = "rtl_bt/rtl8761a_config.bin" },
/* 8822B */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xb),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8822b_fw.bin",
.cfg_name = "rtl_bt/rtl8822b_config.bin" },
};
static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev)
{
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;
break;
}
if (i >= ARRAY_SIZE(ic_id_table))
return NULL;
return &ic_id_table[i];
}
static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
{
struct rtl_rom_version_evt *rom_version;
@@ -118,16 +166,16 @@ static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
return 0;
}
static int rtlbt_parse_firmware(struct hci_dev *hdev, u16 lmp_subver,
const struct firmware *fw,
static int rtlbt_parse_firmware(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev,
unsigned char **_buf)
{
const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
struct rtl_epatch_header *epatch_info;
unsigned char *buf;
int i, ret, len;
int i, len;
size_t min_size;
u8 opcode, length, data, rom_version = 0;
u8 opcode, length, data;
int project_id = -1;
const unsigned char *fwptr, *chip_id_base;
const unsigned char *patch_length_base, *patch_offset_base;
@@ -146,15 +194,11 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev, u16 lmp_subver,
{ RTL_ROM_LMP_8821A, 10 }, /* 8821C */
};
ret = rtl_read_rom_version(hdev, &rom_version);
if (ret)
return ret;
min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3;
if (fw->size < min_size)
if (btrtl_dev->fw_len < min_size)
return -EINVAL;
fwptr = fw->data + fw->size - sizeof(extension_sig);
fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig);
if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
BT_ERR("%s: extension section signature mismatch", hdev->name);
return -EINVAL;
@@ -166,7 +210,7 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev, u16 lmp_subver,
* Once we have that, we double-check that that project_id is suitable
* for the hardware we are working with.
*/
while (fwptr >= fw->data + (sizeof(struct rtl_epatch_header) + 3)) {
while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) {
opcode = *--fwptr;
length = *--fwptr;
data = *--fwptr;
@@ -206,13 +250,15 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev, u16 lmp_subver,
return -EINVAL;
}
if (lmp_subver != project_id_to_lmp_subver[i].lmp_subver) {
if (btrtl_dev->ic_info->lmp_subver !=
project_id_to_lmp_subver[i].lmp_subver) {
BT_ERR("%s: firmware is for %x but this is a %x", hdev->name,
project_id_to_lmp_subver[i].lmp_subver, lmp_subver);
project_id_to_lmp_subver[i].lmp_subver,
btrtl_dev->ic_info->lmp_subver);
return -EINVAL;
}
epatch_info = (struct rtl_epatch_header *)fw->data;
epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data;
if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) {
BT_ERR("%s: bad EPATCH signature", hdev->name);
return -EINVAL;
@@ -229,16 +275,16 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev, u16 lmp_subver,
* Find the right patch for this chip.
*/
min_size += 8 * num_patches;
if (fw->size < min_size)
if (btrtl_dev->fw_len < min_size)
return -EINVAL;
chip_id_base = fw->data + sizeof(struct rtl_epatch_header);
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 == rom_version + 1) {
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 +
@@ -249,20 +295,21 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev, u16 lmp_subver,
if (!patch_offset) {
BT_ERR("%s: didn't find patch for chip id %d",
hdev->name, rom_version);
hdev->name, 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 (fw->size < min_size)
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 = kmemdup(fw->data + patch_offset, patch_length, GFP_KERNEL);
buf = kmemdup(btrtl_dev->fw_data + patch_offset, patch_length,
GFP_KERNEL);
if (!buf)
return -ENOMEM;
@@ -324,7 +371,7 @@ out:
return ret;
}
static int rtl_load_config(struct hci_dev *hdev, const char *name, u8 **buff)
static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff)
{
const struct firmware *fw;
int ret;
@@ -343,96 +390,37 @@ static int rtl_load_config(struct hci_dev *hdev, const char *name, u8 **buff)
return ret;
}
static int btrtl_setup_rtl8723a(struct hci_dev *hdev)
static int btrtl_setup_rtl8723a(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev)
{
const struct firmware *fw;
int ret;
bt_dev_info(hdev, "rtl: loading rtl_bt/rtl8723a_fw.bin");
ret = request_firmware(&fw, "rtl_bt/rtl8723a_fw.bin", &hdev->dev);
if (ret < 0) {
BT_ERR("%s: Failed to load rtl_bt/rtl8723a_fw.bin", hdev->name);
return ret;
}
if (fw->size < 8) {
ret = -EINVAL;
goto out;
}
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(fw->data, RTL_EPATCH_SIGNATURE, 8)) {
if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) {
BT_ERR("%s: unexpected EPATCH signature!", hdev->name);
ret = -EINVAL;
goto out;
}
ret = rtl_download_firmware(hdev, fw->data, fw->size);
out:
release_firmware(fw);
return ret;
}
static int btrtl_setup_rtl8723b(struct hci_dev *hdev, u16 hci_rev,
u16 lmp_subver)
{
unsigned char *fw_data = NULL;
const struct firmware *fw;
int ret;
int cfg_sz;
u8 *cfg_buff = NULL;
u8 *tbuff;
char *cfg_name = NULL;
char *fw_name = NULL;
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;
break;
}
if (i >= ARRAY_SIZE(ic_id_table)) {
BT_ERR("%s: unknown IC info, lmp subver %04x, hci rev %04x",
hdev->name, lmp_subver, hci_rev);
return -EINVAL;
}
cfg_name = ic_id_table[i].cfg_name;
return rtl_download_firmware(hdev, btrtl_dev->fw_data,
btrtl_dev->fw_len);
}
if (cfg_name) {
cfg_sz = rtl_load_config(hdev, cfg_name, &cfg_buff);
if (cfg_sz < 0) {
cfg_sz = 0;
if (ic_id_table[i].config_needed)
BT_ERR("Necessary config file %s not found\n",
cfg_name);
}
} else
cfg_sz = 0;
static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev)
{
unsigned char *fw_data = NULL;
int ret;
u8 *tbuff;
fw_name = ic_id_table[i].fw_name;
bt_dev_info(hdev, "rtl: loading %s", fw_name);
ret = request_firmware(&fw, fw_name, &hdev->dev);
if (ret < 0) {
BT_ERR("%s: Failed to load %s", hdev->name, fw_name);
goto err_req_fw;
}
ret = rtlbt_parse_firmware(hdev, lmp_subver, fw, &fw_data);
ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data);
if (ret < 0)
goto out;
if (cfg_sz) {
tbuff = kzalloc(ret + cfg_sz, GFP_KERNEL);
if (btrtl_dev->cfg_len > 0) {
tbuff = kzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL);
if (!tbuff) {
ret = -ENOMEM;
goto out;
@@ -441,22 +429,18 @@ static int btrtl_setup_rtl8723b(struct hci_dev *hdev, u16 hci_rev,
memcpy(tbuff, fw_data, ret);
kfree(fw_data);
memcpy(tbuff + ret, cfg_buff, cfg_sz);
ret += cfg_sz;
memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len);
ret += btrtl_dev->cfg_len;
fw_data = tbuff;
}
bt_dev_info(hdev, "cfg_sz %d, total size %d", cfg_sz, ret);
rtl_dev_info(hdev, "cfg_sz %d, total sz %d\n", btrtl_dev->cfg_len, ret);
ret = rtl_download_firmware(hdev, fw_data, ret);
out:
release_firmware(fw);
kfree(fw_data);
err_req_fw:
if (cfg_sz)
kfree(cfg_buff);
return ret;
}
@@ -482,15 +466,33 @@ static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev)
return skb;
}
int btrtl_setup_realtek(struct hci_dev *hdev)
void btrtl_free(struct btrtl_device_info *btrtl_dev)
{
kfree(btrtl_dev->fw_data);
kfree(btrtl_dev->cfg_data);
kfree(btrtl_dev);
}
EXPORT_SYMBOL_GPL(btrtl_free);
struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev)
{
struct btrtl_device_info *btrtl_dev;
struct sk_buff *skb;
struct hci_rp_read_local_version *resp;
u16 hci_rev, lmp_subver;
int ret;
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))
return -PTR_ERR(skb);
if (IS_ERR(skb)) {
ret = PTR_ERR(skb);
goto err_free;
}
resp = (struct hci_rp_read_local_version *)skb->data;
bt_dev_info(hdev, "rtl: examining hci_ver=%02x hci_rev=%04x "
@@ -502,26 +504,91 @@ int btrtl_setup_realtek(struct hci_dev *hdev)
lmp_subver = le16_to_cpu(resp->lmp_subver);
kfree_skb(skb);
btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev);
if (!btrtl_dev->ic_info) {
rtl_dev_err(hdev, "unknown IC info, lmp subver %04x, hci rev %04x\n",
lmp_subver, hci_rev);
ret = -EINVAL;
goto err_free;
}
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\n",
btrtl_dev->ic_info->fw_name);
ret = btrtl_dev->fw_len;
goto err_free;
}
if (btrtl_dev->ic_info->cfg_name) {
btrtl_dev->cfg_len = rtl_load_file(hdev,
btrtl_dev->ic_info->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\n",
btrtl_dev->ic_info->cfg_name);
ret = btrtl_dev->cfg_len;
goto err_free;
}
}
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.
*/
switch (lmp_subver) {
switch (btrtl_dev->ic_info->lmp_subver) {
case RTL_ROM_LMP_8723A:
case RTL_ROM_LMP_3499:
return btrtl_setup_rtl8723a(hdev);
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:
return btrtl_setup_rtl8723b(hdev, hci_rev, lmp_subver);
return btrtl_setup_rtl8723b(hdev, btrtl_dev);
default:
bt_dev_info(hdev, "rtl: assuming no firmware upload needed");
return 0;
}
}
EXPORT_SYMBOL_GPL(btrtl_download_firmware);
int btrtl_setup_realtek(struct hci_dev *hdev)
{
struct btrtl_device_info *btrtl_dev;
int ret;
btrtl_dev = btrtl_initialize(hdev);
if (IS_ERR(btrtl_dev))
return PTR_ERR(btrtl_dev);
ret = btrtl_download_firmware(hdev, btrtl_dev);
btrtl_free(btrtl_dev);
return ret;
}
EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>");

26
drivers/bluetooth/btrtl.h
View File

@@ -17,6 +17,13 @@
#define RTL_FRAG_LEN 252
#define rtl_dev_err(dev, fmt, ...) bt_dev_err(dev, "RTL: " fmt, ##__VA_ARGS__)
#define rtl_dev_warn(dev, fmt, ...) bt_dev_warn(dev, "RTL: " fmt, ##__VA_ARGS__)
#define rtl_dev_info(dev, fmt, ...) bt_dev_info(dev, "RTL: " fmt, ##__VA_ARGS__)
#define rtl_dev_dbg(dev, fmt, ...) bt_dev_dbg(dev, "RTL: " fmt, ##__VA_ARGS__)
struct btrtl_device_info;
struct rtl_download_cmd {
__u8 index;
__u8 data[RTL_FRAG_LEN];
@@ -40,10 +47,29 @@ struct rtl_epatch_header {
#if IS_ENABLED(CONFIG_BT_RTL)
struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev);
void btrtl_free(struct btrtl_device_info *btrtl_dev);
int btrtl_download_firmware(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev);
int btrtl_setup_realtek(struct hci_dev *hdev);
#else
static inline struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline void btrtl_free(struct btrtl_device_info *btrtl_dev)
{
}
static inline int btrtl_download_firmware(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev)
{
return -EOPNOTSUPP;
}
static inline int btrtl_setup_realtek(struct hci_dev *hdev)
{
return -EOPNOTSUPP;