Orange Pi5 kernel

// 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_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_8723D	0x8873
#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_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" },
 
<------>/* 8723DU */
<------>{ IC_INFO(RTL_ROM_LMP_8723D, 0x826C),
<------>  .config_needed = true,
<------>  .has_rom_version = true,
<------>  .fw_name  = "rtl_bt/rtl8723d_fw.bin",
<------>  .cfg_name = "rtl_bt/rtl8723d_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_INFO(RTL_ROM_LMP_8761A, 0xa),
<------>  .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),
<------>  .config_needed = false,
<------>  .has_rom_version = true,
<------>  .fw_name  = "rtl_bt/rtl8761b_fw.bin",
<------>  .cfg_name = "rtl_bt/rtl8761b_config" },
 
<------>/* 8822C with UART interface */
<------>{ .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV |
<------><------><------> IC_MATCH_FL_HCIBUS,
<------>  .lmp_subver = RTL_ROM_LMP_8822B,
<------>  .hci_rev = 0x000c,
<------>  .hci_ver = 0x0a,
<------>  .hci_bus = HCI_UART,
<------>  .config_needed = true,
<------>  .has_rom_version = 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),
<------>  .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" },
 
<------>/* 8852B */
<------>{ IC_INFO(RTL_ROM_LMP_8852A, 0xb),
<------>  .config_needed = false,
<------>  .has_rom_version = true,
<------>  .fw_name  = "rtl_bt/rtl8852bu_fw.bin",
<------>  .cfg_name = "rtl_bt/rtl8852bu_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 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_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, 20 },	/* 8852B */
<------>};
 
<------>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 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)
<------><------><------>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;
}
 
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;
<------>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, "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);
<------>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, "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;
<------><------>}
<------>}
 
<------>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:
<------>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:
<------>case RTL_ROM_LMP_8852A:
<------><------>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);
 
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);
 
<------>/* Enable controller to do both LE scan and BR/EDR inquiry
<------> * simultaneously.
<------> */
<------>set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
 
<------>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/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/rtl8852bu_fw.bin");
MODULE_FIRMWARE("rtl_bt/rtl8852bu_config.bin");