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path: root/drivers/bluetooth/btbcm.c
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Diffstat (limited to 'drivers/bluetooth/btbcm.c')
-rw-r--r--drivers/bluetooth/btbcm.c387
1 files changed, 387 insertions, 0 deletions
diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c
new file mode 100644
index 000000000000..d0741f3ed7ec
--- /dev/null
+++ b/drivers/bluetooth/btbcm.c
@@ -0,0 +1,387 @@
+/*
+ *
+ * Bluetooth support for Broadcom devices
+ *
+ * Copyright (C) 2015 Intel Corporation
+ *
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/firmware.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "btbcm.h"
+
+#define VERSION "0.1"
+
+#define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20, 0x00}})
+
+int btbcm_check_bdaddr(struct hci_dev *hdev)
+{
+ struct hci_rp_read_bd_addr *bda;
+ struct sk_buff *skb;
+
+ skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ int err = PTR_ERR(skb);
+ BT_ERR("%s: BCM: Reading device address failed (%d)",
+ hdev->name, err);
+ return err;
+ }
+
+ if (skb->len != sizeof(*bda)) {
+ BT_ERR("%s: BCM: Device address length mismatch", hdev->name);
+ kfree_skb(skb);
+ return -EIO;
+ }
+
+ bda = (struct hci_rp_read_bd_addr *)skb->data;
+ if (bda->status) {
+ BT_ERR("%s: BCM: Device address result failed (%02x)",
+ hdev->name, bda->status);
+ kfree_skb(skb);
+ return -bt_to_errno(bda->status);
+ }
+
+ /* The address 00:20:70:02:A0:00 indicates a BCM20702A0 controller
+ * with no configured address.
+ */
+ if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0)) {
+ BT_INFO("%s: BCM: Using default device address (%pMR)",
+ hdev->name, &bda->bdaddr);
+ set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
+ }
+
+ kfree_skb(skb);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_check_bdaddr);
+
+int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
+{
+ struct sk_buff *skb;
+ int err;
+
+ skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ BT_ERR("%s: BCM: Change address command failed (%d)",
+ hdev->name, err);
+ return err;
+ }
+ kfree_skb(skb);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);
+
+static int btbcm_reset(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+
+ skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ int err = PTR_ERR(skb);
+ BT_ERR("%s: BCM: Reset failed (%d)", hdev->name, err);
+ return err;
+ }
+ kfree_skb(skb);
+
+ return 0;
+}
+
+static struct sk_buff *btbcm_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)) {
+ BT_ERR("%s: BCM: Reading local version info failed (%ld)",
+ hdev->name, PTR_ERR(skb));
+ return skb;
+ }
+
+ if (skb->len != sizeof(struct hci_rp_read_local_version)) {
+ BT_ERR("%s: BCM: Local version length mismatch", hdev->name);
+ kfree_skb(skb);
+ return ERR_PTR(-EIO);
+ }
+
+ return skb;
+}
+
+static struct sk_buff *btbcm_read_verbose_config(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+
+ skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ BT_ERR("%s: BCM: Read verbose config info failed (%ld)",
+ hdev->name, PTR_ERR(skb));
+ return skb;
+ }
+
+ if (skb->len != 7) {
+ BT_ERR("%s: BCM: Verbose config length mismatch", hdev->name);
+ kfree_skb(skb);
+ return ERR_PTR(-EIO);
+ }
+
+ return skb;
+}
+
+static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+
+ skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ BT_ERR("%s: BCM: Read USB product info failed (%ld)",
+ hdev->name, PTR_ERR(skb));
+ return skb;
+ }
+
+ if (skb->len != 5) {
+ BT_ERR("%s: BCM: USB product length mismatch", hdev->name);
+ kfree_skb(skb);
+ return ERR_PTR(-EIO);
+ }
+
+ return skb;
+}
+
+static const struct {
+ u16 subver;
+ const char *name;
+} bcm_uart_subver_table[] = {
+ { 0x410e, "BCM43341B0" }, /* 002.001.014 */
+ { }
+};
+
+static const struct {
+ u16 subver;
+ const char *name;
+} bcm_usb_subver_table[] = {
+ { 0x210b, "BCM43142A0" }, /* 001.001.011 */
+ { 0x2112, "BCM4314A0" }, /* 001.001.018 */
+ { 0x2118, "BCM20702A0" }, /* 001.001.024 */
+ { 0x2126, "BCM4335A0" }, /* 001.001.038 */
+ { 0x220e, "BCM20702A1" }, /* 001.002.014 */
+ { 0x230f, "BCM4354A2" }, /* 001.003.015 */
+ { 0x4106, "BCM4335B0" }, /* 002.001.006 */
+ { 0x410e, "BCM20702B0" }, /* 002.001.014 */
+ { 0x6109, "BCM4335C0" }, /* 003.001.009 */
+ { 0x610c, "BCM4354" }, /* 003.001.012 */
+ { }
+};
+
+int btbcm_setup_patchram(struct hci_dev *hdev)
+{
+ const struct hci_command_hdr *cmd;
+ const struct firmware *fw;
+ const u8 *fw_ptr;
+ size_t fw_size;
+ char fw_name[64];
+ u16 opcode, subver, rev, pid, vid;
+ const char *hw_name = NULL;
+ struct sk_buff *skb;
+ struct hci_rp_read_local_version *ver;
+ int i, err;
+
+ /* Reset */
+ err = btbcm_reset(hdev);
+ if (err)
+ return err;
+
+ /* Read Local Version Info */
+ skb = btbcm_read_local_version(hdev);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ ver = (struct hci_rp_read_local_version *)skb->data;
+ rev = le16_to_cpu(ver->hci_rev);
+ subver = le16_to_cpu(ver->lmp_subver);
+ kfree_skb(skb);
+
+ /* Read Verbose Config Version Info */
+ skb = btbcm_read_verbose_config(hdev);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ BT_INFO("%s: BCM: chip id %u", hdev->name, skb->data[1]);
+ kfree_skb(skb);
+
+ switch ((rev & 0xf000) >> 12) {
+ case 0:
+ for (i = 0; bcm_uart_subver_table[i].name; i++) {
+ if (subver == bcm_uart_subver_table[i].subver) {
+ hw_name = bcm_uart_subver_table[i].name;
+ break;
+ }
+ }
+
+ snprintf(fw_name, sizeof(fw_name), "brcm/%s.hcd",
+ hw_name ? : "BCM");
+ break;
+ case 1:
+ case 2:
+ /* Read USB Product Info */
+ skb = btbcm_read_usb_product(hdev);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ vid = get_unaligned_le16(skb->data + 1);
+ pid = get_unaligned_le16(skb->data + 3);
+ kfree_skb(skb);
+
+ for (i = 0; bcm_usb_subver_table[i].name; i++) {
+ if (subver == bcm_usb_subver_table[i].subver) {
+ hw_name = bcm_usb_subver_table[i].name;
+ break;
+ }
+ }
+
+ snprintf(fw_name, sizeof(fw_name), "brcm/%s-%4.4x-%4.4x.hcd",
+ hw_name ? : "BCM", vid, pid);
+ break;
+ default:
+ return 0;
+ }
+
+ BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
+ hw_name ? : "BCM", (subver & 0x7000) >> 13,
+ (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
+
+ err = request_firmware(&fw, fw_name, &hdev->dev);
+ if (err < 0) {
+ BT_INFO("%s: BCM: patch %s not found", hdev->name, fw_name);
+ return 0;
+ }
+
+ /* Start Download */
+ skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ BT_ERR("%s: BCM: Download Minidrv command failed (%d)",
+ hdev->name, err);
+ goto reset;
+ }
+ kfree_skb(skb);
+
+ /* 50 msec delay after Download Minidrv completes */
+ msleep(50);
+
+ fw_ptr = fw->data;
+ fw_size = fw->size;
+
+ while (fw_size >= sizeof(*cmd)) {
+ const u8 *cmd_param;
+
+ cmd = (struct hci_command_hdr *)fw_ptr;
+ fw_ptr += sizeof(*cmd);
+ fw_size -= sizeof(*cmd);
+
+ if (fw_size < cmd->plen) {
+ BT_ERR("%s: BCM: patch %s is corrupted", hdev->name,
+ fw_name);
+ err = -EINVAL;
+ goto reset;
+ }
+
+ cmd_param = fw_ptr;
+ fw_ptr += cmd->plen;
+ fw_size -= cmd->plen;
+
+ opcode = le16_to_cpu(cmd->opcode);
+
+ skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ BT_ERR("%s: BCM: patch command %04x failed (%d)",
+ hdev->name, opcode, err);
+ goto reset;
+ }
+ kfree_skb(skb);
+ }
+
+ /* 250 msec delay after Launch Ram completes */
+ msleep(250);
+
+reset:
+ /* Reset */
+ err = btbcm_reset(hdev);
+ if (err)
+ goto done;
+
+ /* Read Local Version Info */
+ skb = btbcm_read_local_version(hdev);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ goto done;
+ }
+
+ ver = (struct hci_rp_read_local_version *)skb->data;
+ rev = le16_to_cpu(ver->hci_rev);
+ subver = le16_to_cpu(ver->lmp_subver);
+ kfree_skb(skb);
+
+ BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
+ hw_name ? : "BCM", (subver & 0x7000) >> 13,
+ (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
+
+ btbcm_check_bdaddr(hdev);
+
+ set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
+
+done:
+ release_firmware(fw);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(btbcm_setup_patchram);
+
+int btbcm_setup_apple(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+
+ /* Read Verbose Config Version Info */
+ skb = btbcm_read_verbose_config(hdev);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ BT_INFO("%s: BCM: chip id %u build %4.4u", hdev->name, skb->data[1],
+ get_unaligned_le16(skb->data + 5));
+ kfree_skb(skb);
+
+ set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_setup_apple);
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-19 19:50:48 +0300