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Bluetooth: btrtl: Create separate module for Realtek BT driver
As already done for btintel and btbcm export setup as separate function in a vendor-specific module to hold all the Realtek specific commands. Signed-off-by: Carlo Caione <carlo@endlessm.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Carlo Caione
Marcel Holtmann
parent
a1e85f04d8
commit
db33c77ddd
@ -9,6 +9,10 @@ config BT_BCM
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tristate
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select FW_LOADER
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config BT_RTL
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tristate
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select FW_LOADER
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config BT_HCIBTUSB
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tristate "HCI USB driver"
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depends on USB
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@ -32,6 +36,17 @@ config BT_HCIBTUSB_BCM
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Say Y here to compile support for Broadcom protocol.
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config BT_HCIBTUSB_RTL
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bool "Realtek protocol support"
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depends on BT_HCIBTUSB
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select BT_RTL
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default y
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help
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The Realtek protocol support enables firmware and configuration
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download support for Realtek Bluetooth controllers.
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Say Y here to compile support for Realtek protocol.
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config BT_HCIBTSDIO
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tristate "HCI SDIO driver"
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depends on MMC
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@ -21,6 +21,7 @@ obj-$(CONFIG_BT_MRVL) += btmrvl.o
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obj-$(CONFIG_BT_MRVL_SDIO) += btmrvl_sdio.o
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obj-$(CONFIG_BT_WILINK) += btwilink.o
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obj-$(CONFIG_BT_BCM) += btbcm.o
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obj-$(CONFIG_BT_RTL) += btrtl.o
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btmrvl-y := btmrvl_main.o
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btmrvl-$(CONFIG_DEBUG_FS) += btmrvl_debugfs.o
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390
drivers/bluetooth/btrtl.c
Normal file
390
drivers/bluetooth/btrtl.c
Normal file
@ -0,0 +1,390 @@
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/*
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* Bluetooth support for Realtek devices
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*
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* Copyright (C) 2015 Endless Mobile, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/firmware.h>
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#include <asm/unaligned.h>
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#include <linux/usb.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include "btrtl.h"
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#define VERSION "0.1"
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#define RTL_EPATCH_SIGNATURE "Realtech"
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#define RTL_ROM_LMP_3499 0x3499
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#define RTL_ROM_LMP_8723A 0x1200
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#define RTL_ROM_LMP_8723B 0x8723
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#define RTL_ROM_LMP_8821A 0x8821
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#define RTL_ROM_LMP_8761A 0x8761
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static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
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{
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struct rtl_rom_version_evt *rom_version;
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struct sk_buff *skb;
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/* Read RTL ROM version command */
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skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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BT_ERR("%s: Read ROM version failed (%ld)",
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hdev->name, PTR_ERR(skb));
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return PTR_ERR(skb);
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}
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if (skb->len != sizeof(*rom_version)) {
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BT_ERR("%s: RTL version event length mismatch", hdev->name);
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kfree_skb(skb);
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return -EIO;
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}
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rom_version = (struct rtl_rom_version_evt *)skb->data;
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BT_INFO("%s: rom_version status=%x version=%x",
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hdev->name, rom_version->status, rom_version->version);
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*version = rom_version->version;
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kfree_skb(skb);
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return 0;
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}
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static int rtl8723b_parse_firmware(struct hci_dev *hdev, u16 lmp_subver,
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const struct firmware *fw,
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unsigned char **_buf)
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{
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const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
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struct rtl_epatch_header *epatch_info;
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unsigned char *buf;
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int i, ret, len;
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size_t min_size;
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u8 opcode, length, data, rom_version = 0;
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int project_id = -1;
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const unsigned char *fwptr, *chip_id_base;
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const unsigned char *patch_length_base, *patch_offset_base;
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u32 patch_offset = 0;
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u16 patch_length, num_patches;
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const u16 project_id_to_lmp_subver[] = {
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RTL_ROM_LMP_8723A,
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RTL_ROM_LMP_8723B,
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RTL_ROM_LMP_8821A,
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RTL_ROM_LMP_8761A
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};
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ret = rtl_read_rom_version(hdev, &rom_version);
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if (ret)
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return ret;
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min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3;
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if (fw->size < min_size)
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return -EINVAL;
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fwptr = fw->data + fw->size - sizeof(extension_sig);
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if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
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BT_ERR("%s: extension section signature mismatch", hdev->name);
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return -EINVAL;
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}
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/* Loop from the end of the firmware parsing instructions, until
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* we find an instruction that identifies the "project ID" for the
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* hardware supported by this firwmare file.
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* Once we have that, we double-check that that project_id is suitable
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* for the hardware we are working with.
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*/
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while (fwptr >= fw->data + (sizeof(struct rtl_epatch_header) + 3)) {
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opcode = *--fwptr;
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length = *--fwptr;
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data = *--fwptr;
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BT_DBG("check op=%x len=%x data=%x", opcode, length, data);
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if (opcode == 0xff) /* EOF */
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break;
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if (length == 0) {
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BT_ERR("%s: found instruction with length 0",
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hdev->name);
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return -EINVAL;
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}
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if (opcode == 0 && length == 1) {
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project_id = data;
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break;
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}
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fwptr -= length;
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}
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if (project_id < 0) {
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BT_ERR("%s: failed to find version instruction", hdev->name);
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return -EINVAL;
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}
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if (project_id >= ARRAY_SIZE(project_id_to_lmp_subver)) {
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BT_ERR("%s: unknown project id %d", hdev->name, project_id);
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return -EINVAL;
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}
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if (lmp_subver != project_id_to_lmp_subver[project_id]) {
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BT_ERR("%s: firmware is for %x but this is a %x", hdev->name,
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project_id_to_lmp_subver[project_id], lmp_subver);
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return -EINVAL;
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}
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epatch_info = (struct rtl_epatch_header *)fw->data;
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if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) {
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BT_ERR("%s: bad EPATCH signature", hdev->name);
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return -EINVAL;
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}
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num_patches = le16_to_cpu(epatch_info->num_patches);
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BT_DBG("fw_version=%x, num_patches=%d",
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le32_to_cpu(epatch_info->fw_version), num_patches);
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/* After the rtl_epatch_header there is a funky patch metadata section.
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* Assuming 2 patches, the layout is:
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* ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2
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*
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* Find the right patch for this chip.
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*/
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min_size += 8 * num_patches;
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if (fw->size < min_size)
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return -EINVAL;
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chip_id_base = fw->data + sizeof(struct rtl_epatch_header);
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patch_length_base = chip_id_base + (sizeof(u16) * num_patches);
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patch_offset_base = patch_length_base + (sizeof(u16) * num_patches);
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for (i = 0; i < num_patches; i++) {
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u16 chip_id = get_unaligned_le16(chip_id_base +
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(i * sizeof(u16)));
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if (chip_id == rom_version + 1) {
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patch_length = get_unaligned_le16(patch_length_base +
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(i * sizeof(u16)));
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patch_offset = get_unaligned_le32(patch_offset_base +
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(i * sizeof(u32)));
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break;
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}
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}
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if (!patch_offset) {
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BT_ERR("%s: didn't find patch for chip id %d",
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hdev->name, rom_version);
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return -EINVAL;
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}
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BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i);
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min_size = patch_offset + patch_length;
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if (fw->size < min_size)
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return -EINVAL;
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/* Copy the firmware into a new buffer and write the version at
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* the end.
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*/
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len = patch_length;
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buf = kmemdup(fw->data + patch_offset, patch_length, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4);
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*_buf = buf;
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return len;
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}
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static int rtl_download_firmware(struct hci_dev *hdev,
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const unsigned char *data, int fw_len)
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{
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struct rtl_download_cmd *dl_cmd;
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int frag_num = fw_len / RTL_FRAG_LEN + 1;
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int frag_len = RTL_FRAG_LEN;
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int ret = 0;
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int i;
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dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL);
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if (!dl_cmd)
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return -ENOMEM;
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for (i = 0; i < frag_num; i++) {
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struct sk_buff *skb;
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BT_DBG("download fw (%d/%d)", i, frag_num);
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dl_cmd->index = i;
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if (i == (frag_num - 1)) {
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dl_cmd->index |= 0x80; /* data end */
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frag_len = fw_len % RTL_FRAG_LEN;
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}
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memcpy(dl_cmd->data, data, frag_len);
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/* Send download command */
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skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd,
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HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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BT_ERR("%s: download fw command failed (%ld)",
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hdev->name, PTR_ERR(skb));
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ret = -PTR_ERR(skb);
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goto out;
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}
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if (skb->len != sizeof(struct rtl_download_response)) {
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BT_ERR("%s: download fw event length mismatch",
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hdev->name);
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kfree_skb(skb);
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ret = -EIO;
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goto out;
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}
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kfree_skb(skb);
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data += RTL_FRAG_LEN;
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}
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out:
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kfree(dl_cmd);
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return ret;
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}
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static int btrtl_setup_rtl8723a(struct hci_dev *hdev)
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{
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const struct firmware *fw;
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int ret;
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BT_INFO("%s: rtl: loading rtl_bt/rtl8723a_fw.bin", hdev->name);
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ret = request_firmware(&fw, "rtl_bt/rtl8723a_fw.bin", &hdev->dev);
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if (ret < 0) {
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BT_ERR("%s: Failed to load rtl_bt/rtl8723a_fw.bin", hdev->name);
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return ret;
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}
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if (fw->size < 8) {
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ret = -EINVAL;
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goto out;
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}
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/* Check that the firmware doesn't have the epatch signature
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* (which is only for RTL8723B and newer).
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*/
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if (!memcmp(fw->data, RTL_EPATCH_SIGNATURE, 8)) {
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BT_ERR("%s: unexpected EPATCH signature!", hdev->name);
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ret = -EINVAL;
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goto out;
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}
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ret = rtl_download_firmware(hdev, fw->data, fw->size);
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out:
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release_firmware(fw);
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return ret;
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}
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static int btrtl_setup_rtl8723b(struct hci_dev *hdev, u16 lmp_subver,
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const char *fw_name)
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{
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unsigned char *fw_data = NULL;
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const struct firmware *fw;
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int ret;
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BT_INFO("%s: rtl: loading %s", hdev->name, fw_name);
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ret = request_firmware(&fw, fw_name, &hdev->dev);
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if (ret < 0) {
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BT_ERR("%s: Failed to load %s", hdev->name, fw_name);
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return ret;
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}
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ret = rtl8723b_parse_firmware(hdev, lmp_subver, fw, &fw_data);
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if (ret < 0)
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goto out;
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ret = rtl_download_firmware(hdev, fw_data, ret);
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kfree(fw_data);
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if (ret < 0)
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goto out;
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out:
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release_firmware(fw);
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return ret;
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}
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static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev)
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{
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struct sk_buff *skb;
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skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
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HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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BT_ERR("%s: HCI_OP_READ_LOCAL_VERSION failed (%ld)",
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hdev->name, PTR_ERR(skb));
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return skb;
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}
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if (skb->len != sizeof(struct hci_rp_read_local_version)) {
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BT_ERR("%s: HCI_OP_READ_LOCAL_VERSION event length mismatch",
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hdev->name);
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kfree_skb(skb);
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return ERR_PTR(-EIO);
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}
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return skb;
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}
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int btrtl_setup_realtek(struct hci_dev *hdev)
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{
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struct sk_buff *skb;
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struct hci_rp_read_local_version *resp;
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u16 lmp_subver;
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skb = btrtl_read_local_version(hdev);
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if (IS_ERR(skb))
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return -PTR_ERR(skb);
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resp = (struct hci_rp_read_local_version *)skb->data;
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BT_INFO("%s: rtl: examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x "
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"lmp_subver=%04x", hdev->name, resp->hci_ver, resp->hci_rev,
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resp->lmp_ver, resp->lmp_subver);
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lmp_subver = le16_to_cpu(resp->lmp_subver);
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kfree_skb(skb);
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/* Match a set of subver values that correspond to stock firmware,
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* which is not compatible with standard btusb.
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* If matched, upload an alternative firmware that does conform to
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* standard btusb. Once that firmware is uploaded, the subver changes
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* to a different value.
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*/
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switch (lmp_subver) {
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case RTL_ROM_LMP_8723A:
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case RTL_ROM_LMP_3499:
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return btrtl_setup_rtl8723a(hdev);
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case RTL_ROM_LMP_8723B:
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return btrtl_setup_rtl8723b(hdev, lmp_subver,
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"rtl_bt/rtl8723b_fw.bin");
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case RTL_ROM_LMP_8821A:
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return btrtl_setup_rtl8723b(hdev, lmp_subver,
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"rtl_bt/rtl8821a_fw.bin");
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case RTL_ROM_LMP_8761A:
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return btrtl_setup_rtl8723b(hdev, lmp_subver,
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"rtl_bt/rtl8761a_fw.bin");
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default:
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BT_INFO("rtl: assuming no firmware upload needed.");
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return 0;
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}
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}
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EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
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MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>");
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MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION);
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MODULE_VERSION(VERSION);
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MODULE_LICENSE("GPL");
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52
drivers/bluetooth/btrtl.h
Normal file
52
drivers/bluetooth/btrtl.h
Normal file
@ -0,0 +1,52 @@
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/*
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* Bluetooth support for Realtek devices
|
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*
|
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* Copyright (C) 2015 Endless Mobile, Inc.
|
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*
|
||||
* 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.
|
||||
*
|
||||
*/
|
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|
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#define RTL_FRAG_LEN 252
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struct rtl_download_cmd {
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__u8 index;
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__u8 data[RTL_FRAG_LEN];
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} __packed;
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struct rtl_download_response {
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__u8 status;
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__u8 index;
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} __packed;
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||||
|
||||
struct rtl_rom_version_evt {
|
||||
__u8 status;
|
||||
__u8 version;
|
||||
} __packed;
|
||||
|
||||
struct rtl_epatch_header {
|
||||
__u8 signature[8];
|
||||
__le32 fw_version;
|
||||
__le16 num_patches;
|
||||
} __packed;
|
||||
|
||||
#if IS_ENABLED(CONFIG_BT_RTL)
|
||||
|
||||
int btrtl_setup_realtek(struct hci_dev *hdev);
|
||||
|
||||
#else
|
||||
|
||||
static inline int btrtl_setup_realtek(struct hci_dev *hdev)
|
||||
{
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
#endif
|
||||
@ -31,6 +31,7 @@
|
||||
|
||||
#include "btintel.h"
|
||||
#include "btbcm.h"
|
||||
#include "btrtl.h"
|
||||
|
||||
#define VERSION "0.8"
|
||||
|
||||
@ -1369,378 +1370,6 @@ static int btusb_setup_csr(struct hci_dev *hdev)
|
||||
return ret;
|
||||
}
|
||||
|
||||
#define RTL_FRAG_LEN 252
|
||||
|
||||
struct rtl_download_cmd {
|
||||
__u8 index;
|
||||
__u8 data[RTL_FRAG_LEN];
|
||||
} __packed;
|
||||
|
||||
struct rtl_download_response {
|
||||
__u8 status;
|
||||
__u8 index;
|
||||
} __packed;
|
||||
|
||||
struct rtl_rom_version_evt {
|
||||
__u8 status;
|
||||
__u8 version;
|
||||
} __packed;
|
||||
|
||||
struct rtl_epatch_header {
|
||||
__u8 signature[8];
|
||||
__le32 fw_version;
|
||||
__le16 num_patches;
|
||||
} __packed;
|
||||
|
||||
#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
|
||||
|
||||
static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
|
||||
{
|
||||
struct rtl_rom_version_evt *rom_version;
|
||||
struct sk_buff *skb;
|
||||
int ret;
|
||||
|
||||
/* Read RTL ROM version command */
|
||||
skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
|
||||
if (IS_ERR(skb)) {
|
||||
BT_ERR("%s: Read ROM version failed (%ld)",
|
||||
hdev->name, PTR_ERR(skb));
|
||||
return PTR_ERR(skb);
|
||||
}
|
||||
|
||||
if (skb->len != sizeof(*rom_version)) {
|
||||
BT_ERR("%s: RTL version event length mismatch", hdev->name);
|
||||
kfree_skb(skb);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
rom_version = (struct rtl_rom_version_evt *)skb->data;
|
||||
BT_INFO("%s: rom_version status=%x version=%x",
|
||||
hdev->name, rom_version->status, rom_version->version);
|
||||
|
||||
ret = rom_version->status;
|
||||
if (ret == 0)
|
||||
*version = rom_version->version;
|
||||
|
||||
kfree_skb(skb);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rtl8723b_parse_firmware(struct hci_dev *hdev, u16 lmp_subver,
|
||||
const struct firmware *fw,
|
||||
unsigned char **_buf)
|
||||
{
|
||||
const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
|
||||
struct rtl_epatch_header *epatch_info;
|
||||
unsigned char *buf;
|
||||
int i, ret, len;
|
||||
size_t min_size;
|
||||
u8 opcode, length, data, rom_version = 0;
|
||||
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;
|
||||
const u16 project_id_to_lmp_subver[] = {
|
||||
RTL_ROM_LMP_8723A,
|
||||
RTL_ROM_LMP_8723B,
|
||||
RTL_ROM_LMP_8821A,
|
||||
RTL_ROM_LMP_8761A
|
||||
};
|
||||
|
||||
ret = rtl_read_rom_version(hdev, &rom_version);
|
||||
if (ret)
|
||||
return -bt_to_errno(ret);
|
||||
|
||||
min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3;
|
||||
if (fw->size < min_size)
|
||||
return -EINVAL;
|
||||
|
||||
fwptr = fw->data + fw->size - sizeof(extension_sig);
|
||||
if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
|
||||
BT_ERR("%s: extension section signature mismatch", hdev->name);
|
||||
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 >= fw->data + (sizeof(struct rtl_epatch_header) + 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) {
|
||||
BT_ERR("%s: found instruction with length 0",
|
||||
hdev->name);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (opcode == 0 && length == 1) {
|
||||
project_id = data;
|
||||
break;
|
||||
}
|
||||
|
||||
fwptr -= length;
|
||||
}
|
||||
|
||||
if (project_id < 0) {
|
||||
BT_ERR("%s: failed to find version instruction", hdev->name);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (project_id >= ARRAY_SIZE(project_id_to_lmp_subver)) {
|
||||
BT_ERR("%s: unknown project id %d", hdev->name, project_id);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (lmp_subver != project_id_to_lmp_subver[project_id]) {
|
||||
BT_ERR("%s: firmware is for %x but this is a %x", hdev->name,
|
||||
project_id_to_lmp_subver[project_id], lmp_subver);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
epatch_info = (struct rtl_epatch_header *)fw->data;
|
||||
if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) {
|
||||
BT_ERR("%s: bad EPATCH signature", hdev->name);
|
||||
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 (fw->size < min_size)
|
||||
return -EINVAL;
|
||||
|
||||
chip_id_base = 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) {
|
||||
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) {
|
||||
BT_ERR("%s: didn't find patch for chip id %d",
|
||||
hdev->name, 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)
|
||||
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);
|
||||
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 rtl_download_response *dl_resp;
|
||||
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)) {
|
||||
BT_ERR("%s: download fw command failed (%ld)",
|
||||
hdev->name, PTR_ERR(skb));
|
||||
ret = -PTR_ERR(skb);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (skb->len != sizeof(*dl_resp)) {
|
||||
BT_ERR("%s: download fw event length mismatch",
|
||||
hdev->name);
|
||||
kfree_skb(skb);
|
||||
ret = -EIO;
|
||||
goto out;
|
||||
}
|
||||
|
||||
dl_resp = (struct rtl_download_response *)skb->data;
|
||||
if (dl_resp->status != 0) {
|
||||
kfree_skb(skb);
|
||||
ret = bt_to_errno(dl_resp->status);
|
||||
goto out;
|
||||
}
|
||||
|
||||
kfree_skb(skb);
|
||||
data += RTL_FRAG_LEN;
|
||||
}
|
||||
|
||||
out:
|
||||
kfree(dl_cmd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int btusb_setup_rtl8723a(struct hci_dev *hdev)
|
||||
{
|
||||
struct btusb_data *data = dev_get_drvdata(&hdev->dev);
|
||||
struct usb_device *udev = interface_to_usbdev(data->intf);
|
||||
const struct firmware *fw;
|
||||
int ret;
|
||||
|
||||
BT_INFO("%s: rtl: loading rtl_bt/rtl8723a_fw.bin", hdev->name);
|
||||
ret = request_firmware(&fw, "rtl_bt/rtl8723a_fw.bin", &udev->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;
|
||||
}
|
||||
|
||||
/* 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)) {
|
||||
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 btusb_setup_rtl8723b(struct hci_dev *hdev, u16 lmp_subver,
|
||||
const char *fw_name)
|
||||
{
|
||||
struct btusb_data *data = dev_get_drvdata(&hdev->dev);
|
||||
struct usb_device *udev = interface_to_usbdev(data->intf);
|
||||
unsigned char *fw_data = NULL;
|
||||
const struct firmware *fw;
|
||||
int ret;
|
||||
|
||||
BT_INFO("%s: rtl: loading %s", hdev->name, fw_name);
|
||||
ret = request_firmware(&fw, fw_name, &udev->dev);
|
||||
if (ret < 0) {
|
||||
BT_ERR("%s: Failed to load %s", hdev->name, fw_name);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = rtl8723b_parse_firmware(hdev, lmp_subver, fw, &fw_data);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
ret = rtl_download_firmware(hdev, fw_data, ret);
|
||||
kfree(fw_data);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
out:
|
||||
release_firmware(fw);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int btusb_setup_realtek(struct hci_dev *hdev)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
struct hci_rp_read_local_version *resp;
|
||||
u16 lmp_subver;
|
||||
|
||||
skb = btusb_read_local_version(hdev);
|
||||
if (IS_ERR(skb))
|
||||
return -PTR_ERR(skb);
|
||||
|
||||
resp = (struct hci_rp_read_local_version *)skb->data;
|
||||
BT_INFO("%s: rtl: examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x "
|
||||
"lmp_subver=%04x", hdev->name, resp->hci_ver, resp->hci_rev,
|
||||
resp->lmp_ver, resp->lmp_subver);
|
||||
|
||||
lmp_subver = le16_to_cpu(resp->lmp_subver);
|
||||
kfree_skb(skb);
|
||||
|
||||
/* 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) {
|
||||
case RTL_ROM_LMP_8723A:
|
||||
case RTL_ROM_LMP_3499:
|
||||
return btusb_setup_rtl8723a(hdev);
|
||||
case RTL_ROM_LMP_8723B:
|
||||
return btusb_setup_rtl8723b(hdev, lmp_subver,
|
||||
"rtl_bt/rtl8723b_fw.bin");
|
||||
case RTL_ROM_LMP_8821A:
|
||||
return btusb_setup_rtl8723b(hdev, lmp_subver,
|
||||
"rtl_bt/rtl8821a_fw.bin");
|
||||
case RTL_ROM_LMP_8761A:
|
||||
return btusb_setup_rtl8723b(hdev, lmp_subver,
|
||||
"rtl_bt/rtl8761a_fw.bin");
|
||||
default:
|
||||
BT_INFO("rtl: assuming no firmware upload needed.");
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
|
||||
struct intel_version *ver)
|
||||
{
|
||||
@ -3172,8 +2801,10 @@ static int btusb_probe(struct usb_interface *intf,
|
||||
hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BT_HCIBTUSB_RTL
|
||||
if (id->driver_info & BTUSB_REALTEK)
|
||||
hdev->setup = btusb_setup_realtek;
|
||||
hdev->setup = btrtl_setup_realtek;
|
||||
#endif
|
||||
|
||||
if (id->driver_info & BTUSB_AMP) {
|
||||
/* AMP controllers do not support SCO packets */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user