linux/drivers/bluetooth/btrtl.c
Kai-Heng Feng 00df214b1f Bluetooth: btrtl: Restore old logic to assume firmware is already loaded
Realtek bluetooth may not work after reboot:
[   12.446130] Bluetooth: hci0: RTL: rtl: unknown IC info, lmp subver a99e, hci rev 826c, hci ver 0008

This is a regression introduced by commit 26503ad25d ("Bluetooth:
btrtl: split the device initialization into smaller parts"). The new
logic errors out early when no matching IC info can be found, in this
case it means the firmware is already loaded.

So let's assume the firmware is already loaded when we can't find
matching IC info, like the old logic did.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=201921
Fixes: 26503ad25d ("Bluetooth: btrtl: split the device initialization into smaller parts")
Cc: stable@vger.kernel.org # 4.19+
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2019-01-28 13:23:59 +01:00

775 lines
20 KiB
C

/*
* Bluetooth support for Realtek devices
*
* Copyright (C) 2015 Endless Mobile, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#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_EPATCH_SIGNATURE "Realtech"
#define RTL_ROM_LMP_3499 0x3499
#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_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_INFO(lmps, hcir) \
.match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV, \
.lmp_subver = (lmps), \
.hci_rev = (hcir)
struct id_table {
__u16 match_flags;
__u16 lmp_subver;
__u16 hci_rev;
__u8 hci_ver;
__u8 hci_bus;
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 },
/* 8723BS */
{ .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV |
IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS,
.lmp_subver = RTL_ROM_LMP_8723B,
.hci_rev = 0xb,
.hci_ver = 6,
.hci_bus = 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),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723b_fw.bin",
.cfg_name = "rtl_bt/rtl8723b_config" },
/* 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" },
/* 8723DS */
{ .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV |
IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS,
.lmp_subver = RTL_ROM_LMP_8723B,
.hci_rev = 0xd,
.hci_ver = 8,
.hci_bus = 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),
.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),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8821c_fw.bin",
.cfg_name = "rtl_bt/rtl8821c_config" },
/* 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" },
/* 8822C with USB interface */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xc),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8822cu_fw.bin",
.cfg_name = "rtl_bt/rtl8822cu_config" },
/* 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" },
};
static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
u8 hci_ver, u8 hci_bus)
{
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;
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;
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)\n",
PTR_ERR(skb));
return PTR_ERR(skb);
}
if (skb->len != sizeof(*rom_version)) {
rtl_dev_err(hdev, "RTL version event length mismatch\n");
kfree_skb(skb);
return -EIO;
}
rom_version = (struct rtl_rom_version_evt *)skb->data;
rtl_dev_info(hdev, "rom_version status=%x version=%x\n",
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_8822B, 8 },
{ RTL_ROM_LMP_8723B, 9 }, /* 8723D */
{ RTL_ROM_LMP_8821A, 10 }, /* 8821C */
{ RTL_ROM_LMP_8822B, 13 }, /* 8822C */
};
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\n");
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 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\n");
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\n");
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)
break;
}
if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) {
rtl_dev_err(hdev, "unknown project id %d\n", 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\n",
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\n");
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 = kmemdup(btrtl_dev->fw_data + patch_offset, patch_length,
GFP_KERNEL);
if (!buf)
return -ENOMEM;
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;
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);
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)\n",
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\n");
kfree_skb(skb);
ret = -EIO;
goto out;
}
kfree_skb(skb);
data += RTL_FRAG_LEN;
}
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, "rtl: loading %s\n", name);
ret = request_firmware(&fw, name, &hdev->dev);
if (ret < 0)
return ret;
ret = fw->size;
*buff = kmemdup(fw->data, ret, GFP_KERNEL);
if (!*buff)
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!\n");
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 = kzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL);
if (!tbuff) {
ret = -ENOMEM;
goto out;
}
memcpy(tbuff, fw_data, ret);
kfree(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\n", btrtl_dev->cfg_len, ret);
ret = rtl_download_firmware(hdev, fw_data, ret);
out:
kfree(fw_data);
return ret;
}
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)\n",
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\n");
kfree_skb(skb);
return ERR_PTR(-EIO);
}
return skb;
}
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,
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;
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)) {
ret = PTR_ERR(skb);
goto err_free;
}
resp = (struct hci_rp_read_local_version *)skb->data;
rtl_dev_info(hdev, "rtl: examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x\n",
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);
kfree_skb(skb);
btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
hdev->bus);
if (!btrtl_dev->ic_info) {
rtl_dev_info(hdev, "rtl: 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\n",
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\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.
*/
if (!btrtl_dev->ic_info) {
rtl_dev_info(hdev, "rtl: assuming no firmware upload needed\n");
return 0;
}
switch (btrtl_dev->ic_info->lmp_subver) {
case RTL_ROM_LMP_8723A:
case RTL_ROM_LMP_3499:
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, btrtl_dev);
default:
rtl_dev_info(hdev, "rtl: assuming no firmware upload needed\n");
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, NULL);
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);
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\n");
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\n");
return -EINVAL;
}
if (total_data_len < le16_to_cpu(config->total_len)) {
rtl_dev_err(hdev, "config is too short\n");
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\n");
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)\n",
le16_to_cpu(entry->offset), entry->len);
break;
};
i += sizeof(*entry) + entry->len;
}
if (!found) {
rtl_dev_err(hdev, "no UART config entry found\n");
return -ENOENT;
}
rtl_dev_dbg(hdev, "device baudrate = 0x%08x\n", *device_baudrate);
rtl_dev_dbg(hdev, "controller baudrate = %u\n", *controller_baudrate);
rtl_dev_dbg(hdev, "flow control %d\n", *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/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");