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authorCarlo Caione <carlo@endlessm.com>2015-05-14 10:49:09 +0200
committerMarcel Holtmann <marcel@holtmann.org>2015-05-14 12:04:12 +0200
commitdb33c77dddc2ed2cff3061d0b096a9f5ab0c3647 (patch)
treeba2ea34ffbaa762f11b95f5843e0b9b6f144389c /drivers/bluetooth/btusb.c
parenta1e85f04d8c73f885de1cca46515f66b82049231 (diff)
downloadlwn-db33c77dddc2ed2cff3061d0b096a9f5ab0c3647.tar.gz
lwn-db33c77dddc2ed2cff3061d0b096a9f5ab0c3647.zip
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>
Diffstat (limited to 'drivers/bluetooth/btusb.c')
-rw-r--r--drivers/bluetooth/btusb.c377
1 files changed, 4 insertions, 373 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index d21f3b4176d3..df87016d18ab 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -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 */