linux-stable/drivers/bluetooth/btintel.c
Marcel Holtmann 213445b2b4 Bluetooth: btintel: Enable extra Intel vendor events
The Intel Bluetooth controllers can emit extra vendor specific events in
error conditions or for debugging purposes. To make the life easier for
engineers, enable them by default. When the vendor_diag options has been
enabled, then additional debug events are also enabled.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-10-21 07:34:11 +03:00

546 lines
12 KiB
C

/*
*
* Bluetooth support for Intel 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 <linux/regmap.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "btintel.h"
#define VERSION "0.1"
#define BDADDR_INTEL (&(bdaddr_t) {{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}})
int btintel_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: Reading Intel device address failed (%d)",
hdev->name, err);
return err;
}
if (skb->len != sizeof(*bda)) {
BT_ERR("%s: Intel device address length mismatch", hdev->name);
kfree_skb(skb);
return -EIO;
}
bda = (struct hci_rp_read_bd_addr *)skb->data;
/* For some Intel based controllers, the default Bluetooth device
* address 00:03:19:9E:8B:00 can be found. These controllers are
* fully operational, but have the danger of duplicate addresses
* and that in turn can cause problems with Bluetooth operation.
*/
if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) {
BT_ERR("%s: Found Intel default device address (%pMR)",
hdev->name, &bda->bdaddr);
set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
}
kfree_skb(skb);
return 0;
}
EXPORT_SYMBOL_GPL(btintel_check_bdaddr);
int btintel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
{
struct sk_buff *skb;
int err;
skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
BT_ERR("%s: Changing Intel device address failed (%d)",
hdev->name, err);
return err;
}
kfree_skb(skb);
return 0;
}
EXPORT_SYMBOL_GPL(btintel_set_bdaddr);
int btintel_set_diag(struct hci_dev *hdev, bool enable)
{
struct sk_buff *skb;
u8 param[3];
int err;
if (enable) {
param[0] = 0x03;
param[1] = 0x03;
param[2] = 0x03;
} else {
param[0] = 0x00;
param[1] = 0x00;
param[2] = 0x00;
}
skb = __hci_cmd_sync(hdev, 0xfc43, 3, param, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
if (err == -ENODATA)
goto done;
BT_ERR("%s: Changing Intel diagnostic mode failed (%d)",
hdev->name, err);
return err;
}
kfree_skb(skb);
done:
btintel_set_event_mask(hdev, enable);
return 0;
}
EXPORT_SYMBOL_GPL(btintel_set_diag);
int btintel_set_diag_mfg(struct hci_dev *hdev, bool enable)
{
struct sk_buff *skb;
u8 param[2];
int err;
param[0] = 0x01;
param[1] = 0x00;
skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
BT_ERR("%s: Entering Intel manufacturer mode failed (%d)",
hdev->name, err);
return PTR_ERR(skb);
}
kfree_skb(skb);
err = btintel_set_diag(hdev, enable);
param[0] = 0x00;
param[1] = 0x00;
skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
BT_ERR("%s: Leaving Intel manufacturer mode failed (%d)",
hdev->name, err);
return PTR_ERR(skb);
}
kfree_skb(skb);
return err;
}
EXPORT_SYMBOL_GPL(btintel_set_diag_mfg);
void btintel_hw_error(struct hci_dev *hdev, u8 code)
{
struct sk_buff *skb;
u8 type = 0x00;
BT_ERR("%s: Hardware error 0x%2.2x", hdev->name, code);
skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
BT_ERR("%s: Reset after hardware error failed (%ld)",
hdev->name, PTR_ERR(skb));
return;
}
kfree_skb(skb);
skb = __hci_cmd_sync(hdev, 0xfc22, 1, &type, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
BT_ERR("%s: Retrieving Intel exception info failed (%ld)",
hdev->name, PTR_ERR(skb));
return;
}
if (skb->len != 13) {
BT_ERR("%s: Exception info size mismatch", hdev->name);
kfree_skb(skb);
return;
}
BT_ERR("%s: Exception info %s", hdev->name, (char *)(skb->data + 1));
kfree_skb(skb);
}
EXPORT_SYMBOL_GPL(btintel_hw_error);
void btintel_version_info(struct hci_dev *hdev, struct intel_version *ver)
{
const char *variant;
switch (ver->fw_variant) {
case 0x06:
variant = "Bootloader";
break;
case 0x23:
variant = "Firmware";
break;
default:
return;
}
BT_INFO("%s: %s revision %u.%u build %u week %u %u", hdev->name,
variant, ver->fw_revision >> 4, ver->fw_revision & 0x0f,
ver->fw_build_num, ver->fw_build_ww, 2000 + ver->fw_build_yy);
}
EXPORT_SYMBOL_GPL(btintel_version_info);
int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen,
const void *param)
{
while (plen > 0) {
struct sk_buff *skb;
u8 cmd_param[253], fragment_len = (plen > 252) ? 252 : plen;
cmd_param[0] = fragment_type;
memcpy(cmd_param + 1, param, fragment_len);
skb = __hci_cmd_sync(hdev, 0xfc09, fragment_len + 1,
cmd_param, HCI_INIT_TIMEOUT);
if (IS_ERR(skb))
return PTR_ERR(skb);
kfree_skb(skb);
plen -= fragment_len;
param += fragment_len;
}
return 0;
}
EXPORT_SYMBOL_GPL(btintel_secure_send);
int btintel_load_ddc_config(struct hci_dev *hdev, const char *ddc_name)
{
const struct firmware *fw;
struct sk_buff *skb;
const u8 *fw_ptr;
int err;
err = request_firmware_direct(&fw, ddc_name, &hdev->dev);
if (err < 0) {
bt_dev_err(hdev, "Failed to load Intel DDC file %s (%d)",
ddc_name, err);
return err;
}
bt_dev_info(hdev, "Found Intel DDC parameters: %s", ddc_name);
fw_ptr = fw->data;
/* DDC file contains one or more DDC structure which has
* Length (1 byte), DDC ID (2 bytes), and DDC value (Length - 2).
*/
while (fw->size > fw_ptr - fw->data) {
u8 cmd_plen = fw_ptr[0] + sizeof(u8);
skb = __hci_cmd_sync(hdev, 0xfc8b, cmd_plen, fw_ptr,
HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
bt_dev_err(hdev, "Failed to send Intel_Write_DDC (%ld)",
PTR_ERR(skb));
release_firmware(fw);
return PTR_ERR(skb);
}
fw_ptr += cmd_plen;
kfree_skb(skb);
}
release_firmware(fw);
bt_dev_info(hdev, "Applying Intel DDC parameters completed");
return 0;
}
EXPORT_SYMBOL_GPL(btintel_load_ddc_config);
int btintel_set_event_mask(struct hci_dev *hdev, bool debug)
{
u8 mask[8] = { 0x87, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
struct sk_buff *skb;
int err;
if (debug)
mask[1] |= 0x62;
skb = __hci_cmd_sync(hdev, 0xfc52, 8, mask, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
BT_ERR("%s: Setting Intel event mask failed (%d)",
hdev->name, err);
return err;
}
kfree_skb(skb);
return 0;
}
EXPORT_SYMBOL_GPL(btintel_set_event_mask);
int btintel_set_event_mask_mfg(struct hci_dev *hdev, bool debug)
{
struct sk_buff *skb;
u8 param[2];
int err;
param[0] = 0x01;
param[1] = 0x00;
skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
BT_ERR("%s: Entering Intel manufacturer mode failed (%d)",
hdev->name, err);
return PTR_ERR(skb);
}
kfree_skb(skb);
err = btintel_set_event_mask(hdev, debug);
param[0] = 0x00;
param[1] = 0x00;
skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
BT_ERR("%s: Leaving Intel manufacturer mode failed (%d)",
hdev->name, err);
return PTR_ERR(skb);
}
kfree_skb(skb);
return err;
}
EXPORT_SYMBOL_GPL(btintel_set_event_mask_mfg);
/* ------- REGMAP IBT SUPPORT ------- */
#define IBT_REG_MODE_8BIT 0x00
#define IBT_REG_MODE_16BIT 0x01
#define IBT_REG_MODE_32BIT 0x02
struct regmap_ibt_context {
struct hci_dev *hdev;
__u16 op_write;
__u16 op_read;
};
struct ibt_cp_reg_access {
__le32 addr;
__u8 mode;
__u8 len;
__u8 data[0];
} __packed;
struct ibt_rp_reg_access {
__u8 status;
__le32 addr;
__u8 data[0];
} __packed;
static int regmap_ibt_read(void *context, const void *addr, size_t reg_size,
void *val, size_t val_size)
{
struct regmap_ibt_context *ctx = context;
struct ibt_cp_reg_access cp;
struct ibt_rp_reg_access *rp;
struct sk_buff *skb;
int err = 0;
if (reg_size != sizeof(__le32))
return -EINVAL;
switch (val_size) {
case 1:
cp.mode = IBT_REG_MODE_8BIT;
break;
case 2:
cp.mode = IBT_REG_MODE_16BIT;
break;
case 4:
cp.mode = IBT_REG_MODE_32BIT;
break;
default:
return -EINVAL;
}
/* regmap provides a little-endian formatted addr */
cp.addr = *(__le32 *)addr;
cp.len = val_size;
bt_dev_dbg(ctx->hdev, "Register (0x%x) read", le32_to_cpu(cp.addr));
skb = hci_cmd_sync(ctx->hdev, ctx->op_read, sizeof(cp), &cp,
HCI_CMD_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error (%d)",
le32_to_cpu(cp.addr), err);
return err;
}
if (skb->len != sizeof(*rp) + val_size) {
bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad len",
le32_to_cpu(cp.addr));
err = -EINVAL;
goto done;
}
rp = (struct ibt_rp_reg_access *)skb->data;
if (rp->addr != cp.addr) {
bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad addr",
le32_to_cpu(rp->addr));
err = -EINVAL;
goto done;
}
memcpy(val, rp->data, val_size);
done:
kfree_skb(skb);
return err;
}
static int regmap_ibt_gather_write(void *context,
const void *addr, size_t reg_size,
const void *val, size_t val_size)
{
struct regmap_ibt_context *ctx = context;
struct ibt_cp_reg_access *cp;
struct sk_buff *skb;
int plen = sizeof(*cp) + val_size;
u8 mode;
int err = 0;
if (reg_size != sizeof(__le32))
return -EINVAL;
switch (val_size) {
case 1:
mode = IBT_REG_MODE_8BIT;
break;
case 2:
mode = IBT_REG_MODE_16BIT;
break;
case 4:
mode = IBT_REG_MODE_32BIT;
break;
default:
return -EINVAL;
}
cp = kmalloc(plen, GFP_KERNEL);
if (!cp)
return -ENOMEM;
/* regmap provides a little-endian formatted addr/value */
cp->addr = *(__le32 *)addr;
cp->mode = mode;
cp->len = val_size;
memcpy(&cp->data, val, val_size);
bt_dev_dbg(ctx->hdev, "Register (0x%x) write", le32_to_cpu(cp->addr));
skb = hci_cmd_sync(ctx->hdev, ctx->op_write, plen, cp, HCI_CMD_TIMEOUT);
if (IS_ERR(skb)) {
err = PTR_ERR(skb);
bt_dev_err(ctx->hdev, "regmap: Register (0x%x) write error (%d)",
le32_to_cpu(cp->addr), err);
goto done;
}
kfree_skb(skb);
done:
kfree(cp);
return err;
}
static int regmap_ibt_write(void *context, const void *data, size_t count)
{
/* data contains register+value, since we only support 32bit addr,
* minimum data size is 4 bytes.
*/
if (WARN_ONCE(count < 4, "Invalid register access"))
return -EINVAL;
return regmap_ibt_gather_write(context, data, 4, data + 4, count - 4);
}
static void regmap_ibt_free_context(void *context)
{
kfree(context);
}
static struct regmap_bus regmap_ibt = {
.read = regmap_ibt_read,
.write = regmap_ibt_write,
.gather_write = regmap_ibt_gather_write,
.free_context = regmap_ibt_free_context,
.reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
.val_format_endian_default = REGMAP_ENDIAN_LITTLE,
};
/* Config is the same for all register regions */
static const struct regmap_config regmap_ibt_cfg = {
.name = "btintel_regmap",
.reg_bits = 32,
.val_bits = 32,
};
struct regmap *btintel_regmap_init(struct hci_dev *hdev, u16 opcode_read,
u16 opcode_write)
{
struct regmap_ibt_context *ctx;
bt_dev_info(hdev, "regmap: Init R%x-W%x region", opcode_read,
opcode_write);
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return ERR_PTR(-ENOMEM);
ctx->op_read = opcode_read;
ctx->op_write = opcode_write;
ctx->hdev = hdev;
return regmap_init(&hdev->dev, &regmap_ibt, ctx, &regmap_ibt_cfg);
}
EXPORT_SYMBOL_GPL(btintel_regmap_init);
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("intel/ibt-11-5.sfi");
MODULE_FIRMWARE("intel/ibt-11-5.ddc");