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linux-stable-mirror/drivers/bluetooth/btnxpuart.c
Neeraj Sanjay Kale 103308e50d Bluetooth: btnxpuart: Add an error message if FW dump trigger fails 
This prints an error message if the FW Dump trigger command fails. This
scenario is mainly observed in legacy chipsets 8987 and 8997 and also
IW416, where this feature is unavailable due to memory constraints.

Fixes: 998e447f443f ("Bluetooth: btnxpuart: Add support for HCI coredump feature")
Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2025-04-10 13:09:36 -04:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* NXP Bluetooth driver
* Copyright 2023-2025 NXP
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/serdev.h>
#include <linux/of.h>
#include <linux/skbuff.h>
#include <linux/unaligned.h>
#include <linux/firmware.h>
#include <linux/string.h>
#include <linux/crc8.h>
#include <linux/crc32.h>
#include <linux/string_helpers.h>
#include <linux/gpio/consumer.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "h4_recv.h"
#define MANUFACTURER_NXP 37
#define BTNXPUART_TX_STATE_ACTIVE 1
#define BTNXPUART_FW_DOWNLOADING 2
#define BTNXPUART_CHECK_BOOT_SIGNATURE 3
#define BTNXPUART_SERDEV_OPEN 4
#define BTNXPUART_IR_IN_PROGRESS 5
#define BTNXPUART_FW_DOWNLOAD_ABORT 6
#define BTNXPUART_FW_DUMP_IN_PROGRESS 7
/* NXP HW err codes */
#define BTNXPUART_IR_HW_ERR 0xb0
#define FIRMWARE_W8987 "uart8987_bt.bin"
#define FIRMWARE_W8987_OLD "uartuart8987_bt.bin"
#define FIRMWARE_W8997 "uart8997_bt_v4.bin"
#define FIRMWARE_W8997_OLD "uartuart8997_bt_v4.bin"
#define FIRMWARE_W9098 "uart9098_bt_v1.bin"
#define FIRMWARE_W9098_OLD "uartuart9098_bt_v1.bin"
#define FIRMWARE_IW416 "uartiw416_bt.bin"
#define FIRMWARE_IW416_OLD "uartiw416_bt_v0.bin"
#define FIRMWARE_IW612 "uartspi_n61x_v1.bin.se"
#define FIRMWARE_IW610 "uartspi_iw610.bin"
#define FIRMWARE_SECURE_IW610 "uartspi_iw610.bin.se"
#define FIRMWARE_IW624 "uartiw624_bt.bin"
#define FIRMWARE_SECURE_IW624 "uartiw624_bt.bin.se"
#define FIRMWARE_AW693 "uartaw693_bt.bin"
#define FIRMWARE_SECURE_AW693 "uartaw693_bt.bin.se"
#define FIRMWARE_AW693_A1 "uartaw693_bt_v1.bin"
#define FIRMWARE_SECURE_AW693_A1 "uartaw693_bt_v1.bin.se"
#define FIRMWARE_HELPER "helper_uart_3000000.bin"
#define CHIP_ID_W9098 0x5c03
#define CHIP_ID_IW416 0x7201
#define CHIP_ID_IW612 0x7601
#define CHIP_ID_IW624a 0x8000
#define CHIP_ID_IW624c 0x8001
#define CHIP_ID_AW693a0 0x8200
#define CHIP_ID_AW693a1 0x8201
#define CHIP_ID_IW610a0 0x8800
#define CHIP_ID_IW610a1 0x8801
#define FW_SECURE_MASK 0xc0
#define FW_OPEN 0x00
#define FW_AUTH_ILLEGAL 0x40
#define FW_AUTH_PLAIN 0x80
#define FW_AUTH_ENC 0xc0
#define HCI_NXP_PRI_BAUDRATE 115200
#define HCI_NXP_SEC_BAUDRATE 3000000
#define MAX_FW_FILE_NAME_LEN 50
/* Default ps timeout period in milliseconds */
#define PS_DEFAULT_TIMEOUT_PERIOD_MS 2000
/* wakeup methods */
#define WAKEUP_METHOD_DTR 0
#define WAKEUP_METHOD_BREAK 1
#define WAKEUP_METHOD_EXT_BREAK 2
#define WAKEUP_METHOD_RTS 3
#define WAKEUP_METHOD_GPIO 4
#define WAKEUP_METHOD_INVALID 0xff
/* power save mode status */
#define PS_MODE_DISABLE 0
#define PS_MODE_ENABLE 1
/* Power Save Commands to ps_work_func */
#define PS_CMD_EXIT_PS 1
#define PS_CMD_ENTER_PS 2
/* power save state */
#define PS_STATE_AWAKE 0
#define PS_STATE_SLEEP 1
/* NXP Vendor Commands. Refer user manual UM11628 on nxp.com */
/* Set custom BD Address */
#define HCI_NXP_SET_BD_ADDR 0xfc22
/* Set Auto-Sleep mode */
#define HCI_NXP_AUTO_SLEEP_MODE 0xfc23
/* Set Wakeup method */
#define HCI_NXP_WAKEUP_METHOD 0xfc53
/* Set operational baudrate */
#define HCI_NXP_SET_OPER_SPEED 0xfc09
/* Independent Reset (Soft Reset) */
#define HCI_NXP_IND_RESET 0xfcfc
/* Bluetooth vendor command: Trigger FW dump */
#define HCI_NXP_TRIGGER_DUMP 0xfe91
/* Bluetooth Power State : Vendor cmd params */
#define BT_PS_ENABLE 0x02
#define BT_PS_DISABLE 0x03
/* Bluetooth Host Wakeup Methods */
#define BT_HOST_WAKEUP_METHOD_NONE 0x00
#define BT_HOST_WAKEUP_METHOD_DTR 0x01
#define BT_HOST_WAKEUP_METHOD_BREAK 0x02
#define BT_HOST_WAKEUP_METHOD_GPIO 0x03
/* Bluetooth Chip Wakeup Methods */
#define BT_CTRL_WAKEUP_METHOD_DSR 0x00
#define BT_CTRL_WAKEUP_METHOD_BREAK 0x01
#define BT_CTRL_WAKEUP_METHOD_GPIO 0x02
#define BT_CTRL_WAKEUP_METHOD_EXT_BREAK 0x04
#define BT_CTRL_WAKEUP_METHOD_RTS 0x05
struct ps_data {
u8 target_ps_mode; /* ps mode to be set */
u8 cur_psmode; /* current ps_mode */
u8 ps_state; /* controller's power save state */
u8 ps_cmd;
u8 h2c_wakeupmode;
u8 cur_h2c_wakeupmode;
u8 c2h_wakeupmode;
u8 c2h_wakeup_gpio;
u8 h2c_wakeup_gpio;
bool driver_sent_cmd;
u16 h2c_ps_interval;
u16 c2h_ps_interval;
struct gpio_desc *h2c_ps_gpio;
struct hci_dev *hdev;
struct work_struct work;
struct timer_list ps_timer;
struct mutex ps_lock;
};
struct wakeup_cmd_payload {
u8 c2h_wakeupmode;
u8 c2h_wakeup_gpio;
u8 h2c_wakeupmode;
u8 h2c_wakeup_gpio;
} __packed;
struct psmode_cmd_payload {
u8 ps_cmd;
__le16 c2h_ps_interval;
} __packed;
struct btnxpuart_data {
const char *helper_fw_name;
const char *fw_name;
const char *fw_name_old;
};
enum bootloader_param_change {
not_changed,
cmd_sent,
changed
};
struct btnxpuart_dev {
struct hci_dev *hdev;
struct serdev_device *serdev;
struct work_struct tx_work;
unsigned long tx_state;
struct sk_buff_head txq;
struct sk_buff *rx_skb;
const struct firmware *fw;
u8 fw_name[MAX_FW_FILE_NAME_LEN];
u32 fw_dnld_v1_offset;
u32 fw_v1_sent_bytes;
u32 fw_dnld_v3_offset;
u32 fw_v3_offset_correction;
u32 fw_v3_prev_sent;
u32 fw_v1_expected_len;
u32 boot_reg_offset;
wait_queue_head_t fw_dnld_done_wait_q;
wait_queue_head_t check_boot_sign_wait_q;
u32 new_baudrate;
u32 current_baudrate;
u32 fw_init_baudrate;
enum bootloader_param_change timeout_changed;
enum bootloader_param_change baudrate_changed;
bool helper_downloaded;
struct ps_data psdata;
struct btnxpuart_data *nxp_data;
};
#define NXP_V1_FW_REQ_PKT 0xa5
#define NXP_V1_CHIP_VER_PKT 0xaa
#define NXP_V3_FW_REQ_PKT 0xa7
#define NXP_V3_CHIP_VER_PKT 0xab
#define NXP_ACK_V1 0x5a
#define NXP_NAK_V1 0xbf
#define NXP_ACK_V3 0x7a
#define NXP_NAK_V3 0x7b
#define NXP_CRC_ERROR_V3 0x7c
/* Bootloader signature error codes: Refer AN12820 from nxp.com */
#define NXP_CRC_RX_ERROR BIT(0) /* CRC error in previous packet */
#define NXP_ACK_RX_TIMEOUT BIT(2) /* ACK not received from host */
#define NXP_HDR_RX_TIMEOUT BIT(3) /* FW Header chunk not received */
#define NXP_DATA_RX_TIMEOUT BIT(4) /* FW Data chunk not received */
#define HDR_LEN 16
#define NXP_RECV_CHIP_VER_V1 \
.type = NXP_V1_CHIP_VER_PKT, \
.hlen = 4, \
.loff = 0, \
.lsize = 0, \
.maxlen = 4
#define NXP_RECV_FW_REQ_V1 \
.type = NXP_V1_FW_REQ_PKT, \
.hlen = 4, \
.loff = 0, \
.lsize = 0, \
.maxlen = 4
#define NXP_RECV_CHIP_VER_V3 \
.type = NXP_V3_CHIP_VER_PKT, \
.hlen = 4, \
.loff = 0, \
.lsize = 0, \
.maxlen = 4
#define NXP_RECV_FW_REQ_V3 \
.type = NXP_V3_FW_REQ_PKT, \
.hlen = 9, \
.loff = 0, \
.lsize = 0, \
.maxlen = 9
struct v1_data_req {
__le16 len;
__le16 len_comp;
} __packed;
struct v1_start_ind {
__le16 chip_id;
__le16 chip_id_comp;
} __packed;
struct v3_data_req {
__le16 len;
__le32 offset;
__le16 error;
u8 crc;
} __packed;
struct v3_start_ind {
__le16 chip_id;
u8 loader_ver;
u8 crc;
} __packed;
/* UART register addresses of BT chip */
#define CLKDIVADDR 0x7f00008f
#define UARTDIVADDR 0x7f000090
#define UARTMCRADDR 0x7f000091
#define UARTREINITADDR 0x7f000092
#define UARTICRADDR 0x7f000093
#define UARTFCRADDR 0x7f000094
#define MCR 0x00000022
#define INIT 0x00000001
#define ICR 0x000000c7
#define FCR 0x000000c7
#define POLYNOMIAL8 0x07
struct uart_reg {
__le32 address;
__le32 value;
} __packed;
struct uart_config {
struct uart_reg clkdiv;
struct uart_reg uartdiv;
struct uart_reg mcr;
struct uart_reg re_init;
struct uart_reg icr;
struct uart_reg fcr;
__be32 crc;
} __packed;
struct nxp_bootloader_cmd {
__le32 header;
__le32 arg;
__le32 payload_len;
__be32 crc;
} __packed;
struct nxp_v3_rx_timeout_nak {
u8 nak;
__le32 offset;
u8 crc;
} __packed;
union nxp_v3_rx_timeout_nak_u {
struct nxp_v3_rx_timeout_nak pkt;
u8 buf[6];
};
struct nxp_v3_crc_nak {
u8 nak;
u8 crc;
} __packed;
union nxp_v3_crc_nak_u {
struct nxp_v3_crc_nak pkt;
u8 buf[2];
};
/* FW dump */
#define NXP_FW_DUMP_SIZE (1024 * 1000)
struct nxp_fw_dump_hdr {
__le16 seq_num;
__le16 reserved;
__le16 buf_type;
__le16 buf_len;
};
union nxp_set_bd_addr_payload {
struct {
u8 param_id;
u8 param_len;
u8 param[6];
} __packed data;
u8 buf[8];
};
static u8 crc8_table[CRC8_TABLE_SIZE];
/* Default configurations */
#define DEFAULT_H2C_WAKEUP_MODE WAKEUP_METHOD_BREAK
#define DEFAULT_PS_MODE PS_MODE_ENABLE
#define FW_INIT_BAUDRATE HCI_NXP_PRI_BAUDRATE
static struct sk_buff *nxp_drv_send_cmd(struct hci_dev *hdev, u16 opcode,
u32 plen,
void *param)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct ps_data *psdata = &nxpdev->psdata;
struct sk_buff *skb;
/* set flag to prevent nxp_enqueue from parsing values from this command and
* calling hci_cmd_sync_queue() again.
*/
psdata->driver_sent_cmd = true;
skb = __hci_cmd_sync(hdev, opcode, plen, param, HCI_CMD_TIMEOUT);
psdata->driver_sent_cmd = false;
return skb;
}
static void btnxpuart_tx_wakeup(struct btnxpuart_dev *nxpdev)
{
if (schedule_work(&nxpdev->tx_work))
set_bit(BTNXPUART_TX_STATE_ACTIVE, &nxpdev->tx_state);
}
/* NXP Power Save Feature */
static void ps_start_timer(struct btnxpuart_dev *nxpdev)
{
struct ps_data *psdata = &nxpdev->psdata;
if (!psdata)
return;
if (psdata->cur_psmode == PS_MODE_ENABLE)
mod_timer(&psdata->ps_timer, jiffies + msecs_to_jiffies(psdata->h2c_ps_interval));
if (psdata->ps_state == PS_STATE_AWAKE && psdata->ps_cmd == PS_CMD_ENTER_PS)
cancel_work_sync(&psdata->work);
}
static void ps_cancel_timer(struct btnxpuart_dev *nxpdev)
{
struct ps_data *psdata = &nxpdev->psdata;
flush_work(&psdata->work);
timer_shutdown_sync(&psdata->ps_timer);
}
static void ps_control(struct hci_dev *hdev, u8 ps_state)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct ps_data *psdata = &nxpdev->psdata;
int status = 0;
if (psdata->ps_state == ps_state ||
!test_bit(BTNXPUART_SERDEV_OPEN, &nxpdev->tx_state))
return;
mutex_lock(&psdata->ps_lock);
switch (psdata->cur_h2c_wakeupmode) {
case WAKEUP_METHOD_GPIO:
if (ps_state == PS_STATE_AWAKE)
gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 0);
else
gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 1);
bt_dev_dbg(hdev, "Set h2c_ps_gpio: %s",
str_high_low(ps_state == PS_STATE_SLEEP));
break;
case WAKEUP_METHOD_DTR:
if (ps_state == PS_STATE_AWAKE)
status = serdev_device_set_tiocm(nxpdev->serdev, TIOCM_DTR, 0);
else
status = serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_DTR);
break;
case WAKEUP_METHOD_BREAK:
default:
if (ps_state == PS_STATE_AWAKE)
status = serdev_device_break_ctl(nxpdev->serdev, 0);
else
status = serdev_device_break_ctl(nxpdev->serdev, -1);
msleep(20); /* Allow chip to detect UART-break and enter sleep */
bt_dev_dbg(hdev, "Set UART break: %s, status=%d",
str_on_off(ps_state == PS_STATE_SLEEP), status);
break;
}
if (!status)
psdata->ps_state = ps_state;
mutex_unlock(&psdata->ps_lock);
if (ps_state == PS_STATE_AWAKE)
btnxpuart_tx_wakeup(nxpdev);
}
static void ps_work_func(struct work_struct *work)
{
struct ps_data *data = container_of(work, struct ps_data, work);
if (data->ps_cmd == PS_CMD_ENTER_PS && data->cur_psmode == PS_MODE_ENABLE)
ps_control(data->hdev, PS_STATE_SLEEP);
else if (data->ps_cmd == PS_CMD_EXIT_PS)
ps_control(data->hdev, PS_STATE_AWAKE);
}
static void ps_timeout_func(struct timer_list *t)
{
struct ps_data *data = from_timer(data, t, ps_timer);
struct hci_dev *hdev = data->hdev;
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
if (test_bit(BTNXPUART_TX_STATE_ACTIVE, &nxpdev->tx_state)) {
ps_start_timer(nxpdev);
} else {
data->ps_cmd = PS_CMD_ENTER_PS;
schedule_work(&data->work);
}
}
static int ps_setup(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct serdev_device *serdev = nxpdev->serdev;
struct ps_data *psdata = &nxpdev->psdata;
psdata->h2c_ps_gpio = devm_gpiod_get_optional(&serdev->dev, "device-wakeup",
GPIOD_OUT_LOW);
if (IS_ERR(psdata->h2c_ps_gpio)) {
bt_dev_err(hdev, "Error fetching device-wakeup-gpios: %ld",
PTR_ERR(psdata->h2c_ps_gpio));
return PTR_ERR(psdata->h2c_ps_gpio);
}
if (device_property_read_u8(&serdev->dev, "nxp,wakein-pin", &psdata->h2c_wakeup_gpio)) {
psdata->h2c_wakeup_gpio = 0xff; /* 0xff: use default pin/gpio */
} else if (!psdata->h2c_ps_gpio) {
bt_dev_warn(hdev, "nxp,wakein-pin property without device-wakeup GPIO");
psdata->h2c_wakeup_gpio = 0xff;
}
device_property_read_u8(&serdev->dev, "nxp,wakeout-pin", &psdata->c2h_wakeup_gpio);
psdata->hdev = hdev;
INIT_WORK(&psdata->work, ps_work_func);
mutex_init(&psdata->ps_lock);
timer_setup(&psdata->ps_timer, ps_timeout_func, 0);
return 0;
}
static bool ps_wakeup(struct btnxpuart_dev *nxpdev)
{
struct ps_data *psdata = &nxpdev->psdata;
u8 ps_state;
mutex_lock(&psdata->ps_lock);
ps_state = psdata->ps_state;
mutex_unlock(&psdata->ps_lock);
if (ps_state != PS_STATE_AWAKE) {
psdata->ps_cmd = PS_CMD_EXIT_PS;
schedule_work(&psdata->work);
return true;
}
return false;
}
static void ps_cleanup(struct btnxpuart_dev *nxpdev)
{
struct ps_data *psdata = &nxpdev->psdata;
u8 ps_state;
mutex_lock(&psdata->ps_lock);
ps_state = psdata->ps_state;
mutex_unlock(&psdata->ps_lock);
if (ps_state != PS_STATE_AWAKE)
ps_control(psdata->hdev, PS_STATE_AWAKE);
ps_cancel_timer(nxpdev);
cancel_work_sync(&psdata->work);
mutex_destroy(&psdata->ps_lock);
}
static int send_ps_cmd(struct hci_dev *hdev, void *data)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct ps_data *psdata = &nxpdev->psdata;
struct psmode_cmd_payload pcmd;
struct sk_buff *skb;
u8 *status;
if (psdata->target_ps_mode == PS_MODE_ENABLE)
pcmd.ps_cmd = BT_PS_ENABLE;
else
pcmd.ps_cmd = BT_PS_DISABLE;
pcmd.c2h_ps_interval = __cpu_to_le16(psdata->c2h_ps_interval);
skb = nxp_drv_send_cmd(hdev, HCI_NXP_AUTO_SLEEP_MODE, sizeof(pcmd), &pcmd);
if (IS_ERR(skb)) {
bt_dev_err(hdev, "Setting Power Save mode failed (%ld)", PTR_ERR(skb));
return PTR_ERR(skb);
}
status = skb_pull_data(skb, 1);
if (status) {
if (!*status)
psdata->cur_psmode = psdata->target_ps_mode;
else
psdata->target_ps_mode = psdata->cur_psmode;
if (psdata->cur_psmode == PS_MODE_ENABLE)
ps_start_timer(nxpdev);
else
ps_wakeup(nxpdev);
bt_dev_dbg(hdev, "Power Save mode response: status=%d, ps_mode=%d",
*status, psdata->cur_psmode);
}
kfree_skb(skb);
return 0;
}
static int send_wakeup_method_cmd(struct hci_dev *hdev, void *data)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct ps_data *psdata = &nxpdev->psdata;
struct wakeup_cmd_payload pcmd;
struct sk_buff *skb;
u8 *status;
pcmd.c2h_wakeupmode = psdata->c2h_wakeupmode;
pcmd.c2h_wakeup_gpio = psdata->c2h_wakeup_gpio;
pcmd.h2c_wakeup_gpio = 0xff;
switch (psdata->h2c_wakeupmode) {
case WAKEUP_METHOD_GPIO:
pcmd.h2c_wakeupmode = BT_CTRL_WAKEUP_METHOD_GPIO;
pcmd.h2c_wakeup_gpio = psdata->h2c_wakeup_gpio;
break;
case WAKEUP_METHOD_DTR:
pcmd.h2c_wakeupmode = BT_CTRL_WAKEUP_METHOD_DSR;
break;
case WAKEUP_METHOD_BREAK:
default:
pcmd.h2c_wakeupmode = BT_CTRL_WAKEUP_METHOD_BREAK;
break;
}
skb = nxp_drv_send_cmd(hdev, HCI_NXP_WAKEUP_METHOD, sizeof(pcmd), &pcmd);
if (IS_ERR(skb)) {
bt_dev_err(hdev, "Setting wake-up method failed (%ld)", PTR_ERR(skb));
return PTR_ERR(skb);
}
status = skb_pull_data(skb, 1);
if (status) {
if (*status == 0)
psdata->cur_h2c_wakeupmode = psdata->h2c_wakeupmode;
else
psdata->h2c_wakeupmode = psdata->cur_h2c_wakeupmode;
bt_dev_dbg(hdev, "Set Wakeup Method response: status=%d, h2c_wakeupmode=%d",
*status, psdata->cur_h2c_wakeupmode);
}
kfree_skb(skb);
return 0;
}
static void ps_init(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct ps_data *psdata = &nxpdev->psdata;
u8 default_h2c_wakeup_mode = DEFAULT_H2C_WAKEUP_MODE;
serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_RTS);
usleep_range(5000, 10000);
serdev_device_set_tiocm(nxpdev->serdev, TIOCM_RTS, 0);
usleep_range(5000, 10000);
psdata->ps_state = PS_STATE_AWAKE;
if (psdata->c2h_wakeup_gpio) {
psdata->c2h_wakeupmode = BT_HOST_WAKEUP_METHOD_GPIO;
} else {
psdata->c2h_wakeupmode = BT_HOST_WAKEUP_METHOD_NONE;
psdata->c2h_wakeup_gpio = 0xff;
}
psdata->cur_h2c_wakeupmode = WAKEUP_METHOD_INVALID;
if (psdata->h2c_ps_gpio)
default_h2c_wakeup_mode = WAKEUP_METHOD_GPIO;
psdata->h2c_ps_interval = PS_DEFAULT_TIMEOUT_PERIOD_MS;
switch (default_h2c_wakeup_mode) {
case WAKEUP_METHOD_GPIO:
psdata->h2c_wakeupmode = WAKEUP_METHOD_GPIO;
gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 0);
usleep_range(5000, 10000);
break;
case WAKEUP_METHOD_DTR:
psdata->h2c_wakeupmode = WAKEUP_METHOD_DTR;
serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_DTR);
serdev_device_set_tiocm(nxpdev->serdev, TIOCM_DTR, 0);
break;
case WAKEUP_METHOD_BREAK:
default:
psdata->h2c_wakeupmode = WAKEUP_METHOD_BREAK;
serdev_device_break_ctl(nxpdev->serdev, -1);
usleep_range(5000, 10000);
serdev_device_break_ctl(nxpdev->serdev, 0);
usleep_range(5000, 10000);
break;
}
psdata->cur_psmode = PS_MODE_DISABLE;
psdata->target_ps_mode = DEFAULT_PS_MODE;
}
/* NXP Firmware Download Feature */
static int nxp_download_firmware(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
int err = 0;
nxpdev->fw_dnld_v1_offset = 0;
nxpdev->fw_v1_sent_bytes = 0;
nxpdev->fw_v1_expected_len = HDR_LEN;
nxpdev->boot_reg_offset = 0;
nxpdev->fw_dnld_v3_offset = 0;
nxpdev->fw_v3_offset_correction = 0;
nxpdev->baudrate_changed = not_changed;
nxpdev->timeout_changed = not_changed;
nxpdev->helper_downloaded = false;
serdev_device_set_baudrate(nxpdev->serdev, HCI_NXP_PRI_BAUDRATE);
serdev_device_set_flow_control(nxpdev->serdev, false);
nxpdev->current_baudrate = HCI_NXP_PRI_BAUDRATE;
/* Wait till FW is downloaded */
err = wait_event_interruptible_timeout(nxpdev->fw_dnld_done_wait_q,
!test_bit(BTNXPUART_FW_DOWNLOADING,
&nxpdev->tx_state),
msecs_to_jiffies(60000));
if (nxpdev->fw && strlen(nxpdev->fw_name)) {
release_firmware(nxpdev->fw);
memset(nxpdev->fw_name, 0, sizeof(nxpdev->fw_name));
}
if (err == 0) {
bt_dev_err(hdev, "FW Download Timeout. offset: %d",
nxpdev->fw_dnld_v1_offset ?
nxpdev->fw_dnld_v1_offset :
nxpdev->fw_dnld_v3_offset);
return -ETIMEDOUT;
}
if (test_bit(BTNXPUART_FW_DOWNLOAD_ABORT, &nxpdev->tx_state)) {
bt_dev_err(hdev, "FW Download Aborted");
return -EINTR;
}
serdev_device_set_flow_control(nxpdev->serdev, true);
/* Allow the downloaded FW to initialize */
msleep(1200);
return 0;
}
static void nxp_send_ack(u8 ack, struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
u8 ack_nak[2];
int len = 1;
ack_nak[0] = ack;
if (ack == NXP_ACK_V3) {
ack_nak[1] = crc8(crc8_table, ack_nak, 1, 0xff);
len = 2;
}
serdev_device_write_buf(nxpdev->serdev, ack_nak, len);
}
static bool nxp_fw_change_baudrate(struct hci_dev *hdev, u16 req_len)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct nxp_bootloader_cmd nxp_cmd5;
struct uart_config uart_config;
u32 clkdivaddr = CLKDIVADDR - nxpdev->boot_reg_offset;
u32 uartdivaddr = UARTDIVADDR - nxpdev->boot_reg_offset;
u32 uartmcraddr = UARTMCRADDR - nxpdev->boot_reg_offset;
u32 uartreinitaddr = UARTREINITADDR - nxpdev->boot_reg_offset;
u32 uarticraddr = UARTICRADDR - nxpdev->boot_reg_offset;
u32 uartfcraddr = UARTFCRADDR - nxpdev->boot_reg_offset;
if (req_len == sizeof(nxp_cmd5)) {
nxp_cmd5.header = __cpu_to_le32(5);
nxp_cmd5.arg = 0;
nxp_cmd5.payload_len = __cpu_to_le32(sizeof(uart_config));
/* FW expects swapped CRC bytes */
nxp_cmd5.crc = __cpu_to_be32(crc32_be(0UL, (char *)&nxp_cmd5,
sizeof(nxp_cmd5) - 4));
serdev_device_write_buf(nxpdev->serdev, (u8 *)&nxp_cmd5, sizeof(nxp_cmd5));
nxpdev->fw_v3_offset_correction += req_len;
} else if (req_len == sizeof(uart_config)) {
uart_config.clkdiv.address = __cpu_to_le32(clkdivaddr);
uart_config.clkdiv.value = __cpu_to_le32(0x00c00000);
uart_config.uartdiv.address = __cpu_to_le32(uartdivaddr);
uart_config.uartdiv.value = __cpu_to_le32(1);
uart_config.mcr.address = __cpu_to_le32(uartmcraddr);
uart_config.mcr.value = __cpu_to_le32(MCR);
uart_config.re_init.address = __cpu_to_le32(uartreinitaddr);
uart_config.re_init.value = __cpu_to_le32(INIT);
uart_config.icr.address = __cpu_to_le32(uarticraddr);
uart_config.icr.value = __cpu_to_le32(ICR);
uart_config.fcr.address = __cpu_to_le32(uartfcraddr);
uart_config.fcr.value = __cpu_to_le32(FCR);
/* FW expects swapped CRC bytes */
uart_config.crc = __cpu_to_be32(crc32_be(0UL, (char *)&uart_config,
sizeof(uart_config) - 4));
serdev_device_write_buf(nxpdev->serdev, (u8 *)&uart_config, sizeof(uart_config));
serdev_device_wait_until_sent(nxpdev->serdev, 0);
nxpdev->fw_v3_offset_correction += req_len;
return true;
}
return false;
}
static bool nxp_fw_change_timeout(struct hci_dev *hdev, u16 req_len)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct nxp_bootloader_cmd nxp_cmd7;
if (req_len != sizeof(nxp_cmd7))
return false;
nxp_cmd7.header = __cpu_to_le32(7);
nxp_cmd7.arg = __cpu_to_le32(0x70);
nxp_cmd7.payload_len = 0;
/* FW expects swapped CRC bytes */
nxp_cmd7.crc = __cpu_to_be32(crc32_be(0UL, (char *)&nxp_cmd7,
sizeof(nxp_cmd7) - 4));
serdev_device_write_buf(nxpdev->serdev, (u8 *)&nxp_cmd7, sizeof(nxp_cmd7));
serdev_device_wait_until_sent(nxpdev->serdev, 0);
nxpdev->fw_v3_offset_correction += req_len;
return true;
}
static u32 nxp_get_data_len(const u8 *buf)
{
struct nxp_bootloader_cmd *hdr = (struct nxp_bootloader_cmd *)buf;
return __le32_to_cpu(hdr->payload_len);
}
static bool is_fw_downloading(struct btnxpuart_dev *nxpdev)
{
return test_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
}
static bool ind_reset_in_progress(struct btnxpuart_dev *nxpdev)
{
return test_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state);
}
static bool fw_dump_in_progress(struct btnxpuart_dev *nxpdev)
{
return test_bit(BTNXPUART_FW_DUMP_IN_PROGRESS, &nxpdev->tx_state);
}
static bool process_boot_signature(struct btnxpuart_dev *nxpdev)
{
if (test_bit(BTNXPUART_CHECK_BOOT_SIGNATURE, &nxpdev->tx_state)) {
clear_bit(BTNXPUART_CHECK_BOOT_SIGNATURE, &nxpdev->tx_state);
wake_up_interruptible(&nxpdev->check_boot_sign_wait_q);
return false;
}
return is_fw_downloading(nxpdev);
}
static int nxp_request_firmware(struct hci_dev *hdev, const char *fw_name,
const char *fw_name_old)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
const char *fw_name_dt;
int err = 0;
if (!fw_name)
return -ENOENT;
if (!strlen(nxpdev->fw_name)) {
if (strcmp(fw_name, FIRMWARE_HELPER) &&
!device_property_read_string(&nxpdev->serdev->dev,
"firmware-name",
&fw_name_dt))
fw_name = fw_name_dt;
snprintf(nxpdev->fw_name, MAX_FW_FILE_NAME_LEN, "nxp/%s", fw_name);
err = request_firmware_direct(&nxpdev->fw, nxpdev->fw_name, &hdev->dev);
if (err < 0 && fw_name_old) {
snprintf(nxpdev->fw_name, MAX_FW_FILE_NAME_LEN, "nxp/%s", fw_name_old);
err = request_firmware_direct(&nxpdev->fw, nxpdev->fw_name, &hdev->dev);
}
bt_dev_info(hdev, "Request Firmware: %s", nxpdev->fw_name);
if (err < 0) {
bt_dev_err(hdev, "Firmware file %s not found", nxpdev->fw_name);
clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
}
}
return err;
}
/* for legacy chipsets with V1 bootloader */
static int nxp_recv_chip_ver_v1(struct hci_dev *hdev, struct sk_buff *skb)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct v1_start_ind *req;
__u16 chip_id;
req = skb_pull_data(skb, sizeof(*req));
if (!req)
goto free_skb;
chip_id = le16_to_cpu(req->chip_id ^ req->chip_id_comp);
if (chip_id == 0xffff && nxpdev->fw_dnld_v1_offset) {
nxpdev->fw_dnld_v1_offset = 0;
nxpdev->fw_v1_sent_bytes = 0;
nxpdev->fw_v1_expected_len = HDR_LEN;
release_firmware(nxpdev->fw);
memset(nxpdev->fw_name, 0, sizeof(nxpdev->fw_name));
nxp_send_ack(NXP_ACK_V1, hdev);
}
free_skb:
kfree_skb(skb);
return 0;
}
static int nxp_recv_fw_req_v1(struct hci_dev *hdev, struct sk_buff *skb)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct btnxpuart_data *nxp_data = nxpdev->nxp_data;
struct v1_data_req *req;
__u16 len;
if (!process_boot_signature(nxpdev))
goto free_skb;
req = skb_pull_data(skb, sizeof(*req));
if (!req)
goto free_skb;
len = __le16_to_cpu(req->len ^ req->len_comp);
if (len != 0xffff) {
bt_dev_dbg(hdev, "ERR: Send NAK");
nxp_send_ack(NXP_NAK_V1, hdev);
goto free_skb;
}
nxp_send_ack(NXP_ACK_V1, hdev);
len = __le16_to_cpu(req->len);
if (!nxp_data->helper_fw_name) {
if (nxpdev->timeout_changed != changed) {
nxp_fw_change_timeout(hdev, len);
nxpdev->timeout_changed = changed;
goto free_skb;
}
if (nxpdev->baudrate_changed != changed) {
if (nxp_fw_change_baudrate(hdev, len)) {
nxpdev->baudrate_changed = changed;
serdev_device_set_baudrate(nxpdev->serdev,
HCI_NXP_SEC_BAUDRATE);
serdev_device_set_flow_control(nxpdev->serdev, true);
nxpdev->current_baudrate = HCI_NXP_SEC_BAUDRATE;
}
goto free_skb;
}
}
if (!nxp_data->helper_fw_name || nxpdev->helper_downloaded) {
if (nxp_request_firmware(hdev, nxp_data->fw_name, nxp_data->fw_name_old))
goto free_skb;
} else if (nxp_data->helper_fw_name && !nxpdev->helper_downloaded) {
if (nxp_request_firmware(hdev, nxp_data->helper_fw_name, NULL))
goto free_skb;
}
if (!len) {
bt_dev_info(hdev, "FW Download Complete: %zu bytes",
nxpdev->fw->size);
if (nxp_data->helper_fw_name && !nxpdev->helper_downloaded) {
nxpdev->helper_downloaded = true;
serdev_device_wait_until_sent(nxpdev->serdev, 0);
serdev_device_set_baudrate(nxpdev->serdev,
HCI_NXP_SEC_BAUDRATE);
serdev_device_set_flow_control(nxpdev->serdev, true);
} else {
clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
wake_up_interruptible(&nxpdev->fw_dnld_done_wait_q);
}
goto free_skb;
}
if (len & 0x01) {
/* The CRC did not match at the other end.
* Simply send the same bytes again.
*/
len = nxpdev->fw_v1_sent_bytes;
bt_dev_dbg(hdev, "CRC error. Resend %d bytes of FW.", len);
} else {
nxpdev->fw_dnld_v1_offset += nxpdev->fw_v1_sent_bytes;
/* The FW bin file is made up of many blocks of
* 16 byte header and payload data chunks. If the
* FW has requested a header, read the payload length
* info from the header, before sending the header.
* In the next iteration, the FW should request the
* payload data chunk, which should be equal to the
* payload length read from header. If there is a
* mismatch, clearly the driver and FW are out of sync,
* and we need to re-send the previous header again.
*/
if (len == nxpdev->fw_v1_expected_len) {
if (len == HDR_LEN)
nxpdev->fw_v1_expected_len = nxp_get_data_len(nxpdev->fw->data +
nxpdev->fw_dnld_v1_offset);
else
nxpdev->fw_v1_expected_len = HDR_LEN;
} else if (len == HDR_LEN) {
/* FW download out of sync. Send previous chunk again */
nxpdev->fw_dnld_v1_offset -= nxpdev->fw_v1_sent_bytes;
nxpdev->fw_v1_expected_len = HDR_LEN;
}
}
if (nxpdev->fw_dnld_v1_offset + len <= nxpdev->fw->size)
serdev_device_write_buf(nxpdev->serdev, nxpdev->fw->data +
nxpdev->fw_dnld_v1_offset, len);
nxpdev->fw_v1_sent_bytes = len;
free_skb:
kfree_skb(skb);
return 0;
}
static char *nxp_get_fw_name_from_chipid(struct hci_dev *hdev, u16 chipid,
u8 loader_ver)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
char *fw_name = NULL;
switch (chipid) {
case CHIP_ID_W9098:
fw_name = FIRMWARE_W9098;
break;
case CHIP_ID_IW416:
fw_name = FIRMWARE_IW416;
break;
case CHIP_ID_IW612:
fw_name = FIRMWARE_IW612;
break;
case CHIP_ID_IW624a:
case CHIP_ID_IW624c:
nxpdev->boot_reg_offset = 1;
if ((loader_ver & FW_SECURE_MASK) == FW_OPEN)
fw_name = FIRMWARE_IW624;
else if ((loader_ver & FW_SECURE_MASK) != FW_AUTH_ILLEGAL)
fw_name = FIRMWARE_SECURE_IW624;
else
bt_dev_err(hdev, "Illegal loader version %02x", loader_ver);
break;
case CHIP_ID_AW693a0:
if ((loader_ver & FW_SECURE_MASK) == FW_OPEN)
fw_name = FIRMWARE_AW693;
else if ((loader_ver & FW_SECURE_MASK) != FW_AUTH_ILLEGAL)
fw_name = FIRMWARE_SECURE_AW693;
else
bt_dev_err(hdev, "Illegal loader version %02x", loader_ver);
break;
case CHIP_ID_AW693a1:
if ((loader_ver & FW_SECURE_MASK) == FW_OPEN)
fw_name = FIRMWARE_AW693_A1;
else if ((loader_ver & FW_SECURE_MASK) != FW_AUTH_ILLEGAL)
fw_name = FIRMWARE_SECURE_AW693_A1;
else
bt_dev_err(hdev, "Illegal loader version %02x", loader_ver);
break;
case CHIP_ID_IW610a0:
case CHIP_ID_IW610a1:
if ((loader_ver & FW_SECURE_MASK) == FW_OPEN)
fw_name = FIRMWARE_IW610;
else if ((loader_ver & FW_SECURE_MASK) != FW_AUTH_ILLEGAL)
fw_name = FIRMWARE_SECURE_IW610;
else
bt_dev_err(hdev, "Illegal loader version %02x", loader_ver);
break;
default:
bt_dev_err(hdev, "Unknown chip signature %04x", chipid);
break;
}
return fw_name;
}
static char *nxp_get_old_fw_name_from_chipid(struct hci_dev *hdev, u16 chipid,
u8 loader_ver)
{
char *fw_name_old = NULL;
switch (chipid) {
case CHIP_ID_W9098:
fw_name_old = FIRMWARE_W9098_OLD;
break;
case CHIP_ID_IW416:
fw_name_old = FIRMWARE_IW416_OLD;
break;
}
return fw_name_old;
}
static int nxp_recv_chip_ver_v3(struct hci_dev *hdev, struct sk_buff *skb)
{
struct v3_start_ind *req = skb_pull_data(skb, sizeof(*req));
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
const char *fw_name;
const char *fw_name_old;
u16 chip_id;
u8 loader_ver;
if (!process_boot_signature(nxpdev))
goto free_skb;
chip_id = le16_to_cpu(req->chip_id);
loader_ver = req->loader_ver;
bt_dev_info(hdev, "ChipID: %04x, Version: %d", chip_id, loader_ver);
fw_name = nxp_get_fw_name_from_chipid(hdev, chip_id, loader_ver);
fw_name_old = nxp_get_old_fw_name_from_chipid(hdev, chip_id, loader_ver);
if (!nxp_request_firmware(hdev, fw_name, fw_name_old))
nxp_send_ack(NXP_ACK_V3, hdev);
free_skb:
kfree_skb(skb);
return 0;
}
static void nxp_handle_fw_download_error(struct hci_dev *hdev, struct v3_data_req *req)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
__u32 offset = __le32_to_cpu(req->offset);
__u16 err = __le16_to_cpu(req->error);
union nxp_v3_rx_timeout_nak_u timeout_nak_buf;
union nxp_v3_crc_nak_u crc_nak_buf;
if (err & NXP_CRC_RX_ERROR) {
crc_nak_buf.pkt.nak = NXP_CRC_ERROR_V3;
crc_nak_buf.pkt.crc = crc8(crc8_table, crc_nak_buf.buf,
sizeof(crc_nak_buf) - 1, 0xff);
serdev_device_write_buf(nxpdev->serdev, crc_nak_buf.buf,
sizeof(crc_nak_buf));
} else if (err & NXP_ACK_RX_TIMEOUT ||
err & NXP_HDR_RX_TIMEOUT ||
err & NXP_DATA_RX_TIMEOUT) {
timeout_nak_buf.pkt.nak = NXP_NAK_V3;
timeout_nak_buf.pkt.offset = __cpu_to_le32(offset);
timeout_nak_buf.pkt.crc = crc8(crc8_table, timeout_nak_buf.buf,
sizeof(timeout_nak_buf) - 1, 0xff);
serdev_device_write_buf(nxpdev->serdev, timeout_nak_buf.buf,
sizeof(timeout_nak_buf));
} else {
bt_dev_err(hdev, "Unknown bootloader error code: %d", err);
}
}
static int nxp_recv_fw_req_v3(struct hci_dev *hdev, struct sk_buff *skb)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct v3_data_req *req;
__u16 len = 0;
__u16 err = 0;
__u32 offset;
if (!process_boot_signature(nxpdev))
goto free_skb;
req = skb_pull_data(skb, sizeof(*req));
if (!req || !nxpdev->fw)
goto free_skb;
err = __le16_to_cpu(req->error);
if (!err) {
nxp_send_ack(NXP_ACK_V3, hdev);
if (nxpdev->timeout_changed == cmd_sent)
nxpdev->timeout_changed = changed;
if (nxpdev->baudrate_changed == cmd_sent)
nxpdev->baudrate_changed = changed;
} else {
nxp_handle_fw_download_error(hdev, req);
if (nxpdev->timeout_changed == cmd_sent &&
err == NXP_CRC_RX_ERROR) {
nxpdev->fw_v3_offset_correction -= nxpdev->fw_v3_prev_sent;
nxpdev->timeout_changed = not_changed;
}
if (nxpdev->baudrate_changed == cmd_sent &&
err == NXP_CRC_RX_ERROR) {
nxpdev->fw_v3_offset_correction -= nxpdev->fw_v3_prev_sent;
nxpdev->baudrate_changed = not_changed;
}
goto free_skb;
}
len = __le16_to_cpu(req->len);
if (nxpdev->timeout_changed != changed) {
nxp_fw_change_timeout(hdev, len);
nxpdev->timeout_changed = cmd_sent;
goto free_skb;
}
if (nxpdev->baudrate_changed != changed) {
if (nxp_fw_change_baudrate(hdev, len)) {
nxpdev->baudrate_changed = cmd_sent;
serdev_device_set_baudrate(nxpdev->serdev,
HCI_NXP_SEC_BAUDRATE);
serdev_device_set_flow_control(nxpdev->serdev, true);
nxpdev->current_baudrate = HCI_NXP_SEC_BAUDRATE;
}
goto free_skb;
}
if (req->len == 0) {
bt_dev_info(hdev, "FW Download Complete: %zu bytes",
nxpdev->fw->size);
clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
wake_up_interruptible(&nxpdev->fw_dnld_done_wait_q);
goto free_skb;
}
offset = __le32_to_cpu(req->offset);
if (offset < nxpdev->fw_v3_offset_correction) {
/* This scenario should ideally never occur. But if it ever does,
* FW is out of sync and needs a power cycle.
*/
bt_dev_err(hdev, "Something went wrong during FW download");
bt_dev_err(hdev, "Please power cycle and try again");
goto free_skb;
}
nxpdev->fw_dnld_v3_offset = offset - nxpdev->fw_v3_offset_correction;
serdev_device_write_buf(nxpdev->serdev, nxpdev->fw->data +
nxpdev->fw_dnld_v3_offset, len);
free_skb:
nxpdev->fw_v3_prev_sent = len;
kfree_skb(skb);
return 0;
}
static int nxp_set_baudrate_cmd(struct hci_dev *hdev, void *data)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
__le32 new_baudrate = __cpu_to_le32(nxpdev->new_baudrate);
struct ps_data *psdata = &nxpdev->psdata;
struct sk_buff *skb;
u8 *status;
if (!psdata)
return 0;
skb = nxp_drv_send_cmd(hdev, HCI_NXP_SET_OPER_SPEED, 4, (u8 *)&new_baudrate);
if (IS_ERR(skb)) {
bt_dev_err(hdev, "Setting baudrate failed (%ld)", PTR_ERR(skb));
return PTR_ERR(skb);
}
status = (u8 *)skb_pull_data(skb, 1);
if (status) {
if (*status == 0) {
serdev_device_set_baudrate(nxpdev->serdev, nxpdev->new_baudrate);
nxpdev->current_baudrate = nxpdev->new_baudrate;
}
bt_dev_dbg(hdev, "Set baudrate response: status=%d, baudrate=%d",
*status, nxpdev->new_baudrate);
}
kfree_skb(skb);
return 0;
}
static int nxp_check_boot_sign(struct btnxpuart_dev *nxpdev)
{
serdev_device_set_baudrate(nxpdev->serdev, HCI_NXP_PRI_BAUDRATE);
if (ind_reset_in_progress(nxpdev))
serdev_device_set_flow_control(nxpdev->serdev, false);
else
serdev_device_set_flow_control(nxpdev->serdev, true);
set_bit(BTNXPUART_CHECK_BOOT_SIGNATURE, &nxpdev->tx_state);
return wait_event_interruptible_timeout(nxpdev->check_boot_sign_wait_q,
!test_bit(BTNXPUART_CHECK_BOOT_SIGNATURE,
&nxpdev->tx_state),
msecs_to_jiffies(1000));
}
static int nxp_set_ind_reset(struct hci_dev *hdev, void *data)
{
static const u8 ir_hw_err[] = { HCI_EV_HARDWARE_ERROR,
0x01, BTNXPUART_IR_HW_ERR };
struct sk_buff *skb;
skb = bt_skb_alloc(3, GFP_ATOMIC);
if (!skb)
return -ENOMEM;
hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
skb_put_data(skb, ir_hw_err, 3);
/* Inject Hardware Error to upper stack */
return hci_recv_frame(hdev, skb);
}
/* Firmware dump */
static void nxp_coredump(struct hci_dev *hdev)
{
struct sk_buff *skb;
u8 pcmd = 2;
skb = nxp_drv_send_cmd(hdev, HCI_NXP_TRIGGER_DUMP, 1, &pcmd);
if (IS_ERR(skb))
bt_dev_err(hdev, "Failed to trigger FW Dump. (%ld)", PTR_ERR(skb));
else
kfree_skb(skb);
}
static void nxp_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb)
{
/* Nothing to be added in FW dump header */
}
static int nxp_process_fw_dump(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_acl_hdr *acl_hdr = (struct hci_acl_hdr *)skb_pull_data(skb,
sizeof(*acl_hdr));
struct nxp_fw_dump_hdr *fw_dump_hdr = (struct nxp_fw_dump_hdr *)skb->data;
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
__u16 seq_num = __le16_to_cpu(fw_dump_hdr->seq_num);
__u16 buf_len = __le16_to_cpu(fw_dump_hdr->buf_len);
int err;
if (seq_num == 0x0001) {
if (test_and_set_bit(BTNXPUART_FW_DUMP_IN_PROGRESS, &nxpdev->tx_state)) {
bt_dev_err(hdev, "FW dump already in progress");
goto free_skb;
}
bt_dev_warn(hdev, "==== Start FW dump ===");
err = hci_devcd_init(hdev, NXP_FW_DUMP_SIZE);
if (err < 0)
goto free_skb;
schedule_delayed_work(&hdev->dump.dump_timeout,
msecs_to_jiffies(20000));
}
err = hci_devcd_append(hdev, skb_clone(skb, GFP_ATOMIC));
if (err < 0)
goto free_skb;
if (buf_len == 0) {
bt_dev_warn(hdev, "==== FW dump complete ===");
clear_bit(BTNXPUART_FW_DUMP_IN_PROGRESS, &nxpdev->tx_state);
hci_devcd_complete(hdev);
nxp_set_ind_reset(hdev, NULL);
}
free_skb:
kfree_skb(skb);
return 0;
}
static int nxp_recv_acl_pkt(struct hci_dev *hdev, struct sk_buff *skb)
{
__u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
/* FW dump chunks are ACL packets with conn handle 0xfff */
if ((handle & 0x0FFF) == 0xFFF)
return nxp_process_fw_dump(hdev, skb);
else
return hci_recv_frame(hdev, skb);
}
static int nxp_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
{
union nxp_set_bd_addr_payload pcmd;
int err;
pcmd.data.param_id = 0xfe;
pcmd.data.param_len = 6;
memcpy(pcmd.data.param, bdaddr, 6);
/* BD address can be assigned only after first reset command. */
err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
HCI_INIT_TIMEOUT);
if (err) {
bt_dev_err(hdev,
"Reset before setting local-bd-addr failed (%d)",
err);
return err;
}
err = __hci_cmd_sync_status(hdev, HCI_NXP_SET_BD_ADDR, sizeof(pcmd),
pcmd.buf, HCI_CMD_TIMEOUT);
if (err) {
bt_dev_err(hdev, "Changing device address failed (%d)", err);
return err;
}
return 0;
}
/* NXP protocol */
static int nxp_setup(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
int err = 0;
if (nxp_check_boot_sign(nxpdev)) {
bt_dev_dbg(hdev, "Need FW Download.");
err = nxp_download_firmware(hdev);
if (err < 0)
return err;
} else {
bt_dev_info(hdev, "FW already running.");
clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
}
serdev_device_set_baudrate(nxpdev->serdev, nxpdev->fw_init_baudrate);
nxpdev->current_baudrate = nxpdev->fw_init_baudrate;
ps_init(hdev);
if (test_and_clear_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state))
hci_dev_clear_flag(hdev, HCI_SETUP);
return 0;
}
static int nxp_post_init(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct ps_data *psdata = &nxpdev->psdata;
if (nxpdev->current_baudrate != HCI_NXP_SEC_BAUDRATE) {
nxpdev->new_baudrate = HCI_NXP_SEC_BAUDRATE;
nxp_set_baudrate_cmd(hdev, NULL);
}
if (psdata->cur_h2c_wakeupmode != psdata->h2c_wakeupmode)
send_wakeup_method_cmd(hdev, NULL);
if (psdata->cur_psmode != psdata->target_ps_mode)
send_ps_cmd(hdev, NULL);
return 0;
}
static void nxp_hw_err(struct hci_dev *hdev, u8 code)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
switch (code) {
case BTNXPUART_IR_HW_ERR:
set_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state);
hci_dev_set_flag(hdev, HCI_SETUP);
break;
default:
break;
}
}
static int nxp_shutdown(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct sk_buff *skb;
u8 pcmd = 0;
if (ind_reset_in_progress(nxpdev)) {
skb = nxp_drv_send_cmd(hdev, HCI_NXP_IND_RESET, 1, &pcmd);
serdev_device_set_flow_control(nxpdev->serdev, false);
set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
/* HCI_NXP_IND_RESET command may not returns any response */
if (!IS_ERR(skb))
kfree_skb(skb);
}
return 0;
}
static bool nxp_wakeup(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct ps_data *psdata = &nxpdev->psdata;
if (psdata->c2h_wakeupmode != BT_HOST_WAKEUP_METHOD_NONE)
return true;
return false;
}
static void nxp_reset(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
if (!ind_reset_in_progress(nxpdev) && !fw_dump_in_progress(nxpdev)) {
bt_dev_dbg(hdev, "CMD Timeout detected. Resetting.");
nxp_set_ind_reset(hdev, NULL);
}
}
static int btnxpuart_queue_skb(struct hci_dev *hdev, struct sk_buff *skb)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
/* Prepend skb with frame type */
memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
skb_queue_tail(&nxpdev->txq, skb);
btnxpuart_tx_wakeup(nxpdev);
return 0;
}
static int nxp_enqueue(struct hci_dev *hdev, struct sk_buff *skb)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct ps_data *psdata = &nxpdev->psdata;
struct hci_command_hdr *hdr;
struct psmode_cmd_payload ps_parm;
struct wakeup_cmd_payload wakeup_parm;
__le32 baudrate_parm;
if (fw_dump_in_progress(nxpdev))
return -EBUSY;
/* if vendor commands are received from user space (e.g. hcitool), update
* driver flags accordingly and ask driver to re-send the command to FW.
* In case the payload for any command does not match expected payload
* length, let the firmware and user space program handle it, or throw
* an error.
*/
if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT && !psdata->driver_sent_cmd) {
hdr = (struct hci_command_hdr *)skb->data;
if (hdr->plen != (skb->len - HCI_COMMAND_HDR_SIZE))
return btnxpuart_queue_skb(hdev, skb);
switch (__le16_to_cpu(hdr->opcode)) {
case HCI_NXP_AUTO_SLEEP_MODE:
if (hdr->plen == sizeof(ps_parm)) {
memcpy(&ps_parm, skb->data + HCI_COMMAND_HDR_SIZE, hdr->plen);
if (ps_parm.ps_cmd == BT_PS_ENABLE)
psdata->target_ps_mode = PS_MODE_ENABLE;
else if (ps_parm.ps_cmd == BT_PS_DISABLE)
psdata->target_ps_mode = PS_MODE_DISABLE;
psdata->c2h_ps_interval = __le16_to_cpu(ps_parm.c2h_ps_interval);
hci_cmd_sync_queue(hdev, send_ps_cmd, NULL, NULL);
goto free_skb;
}
break;
case HCI_NXP_WAKEUP_METHOD:
if (hdr->plen == sizeof(wakeup_parm)) {
memcpy(&wakeup_parm, skb->data + HCI_COMMAND_HDR_SIZE, hdr->plen);
psdata->c2h_wakeupmode = wakeup_parm.c2h_wakeupmode;
psdata->c2h_wakeup_gpio = wakeup_parm.c2h_wakeup_gpio;
psdata->h2c_wakeup_gpio = wakeup_parm.h2c_wakeup_gpio;
switch (wakeup_parm.h2c_wakeupmode) {
case BT_CTRL_WAKEUP_METHOD_GPIO:
psdata->h2c_wakeupmode = WAKEUP_METHOD_GPIO;
break;
case BT_CTRL_WAKEUP_METHOD_DSR:
psdata->h2c_wakeupmode = WAKEUP_METHOD_DTR;
break;
case BT_CTRL_WAKEUP_METHOD_BREAK:
default:
psdata->h2c_wakeupmode = WAKEUP_METHOD_BREAK;
break;
}
hci_cmd_sync_queue(hdev, send_wakeup_method_cmd, NULL, NULL);
goto free_skb;
}
break;
case HCI_NXP_SET_OPER_SPEED:
if (hdr->plen == sizeof(baudrate_parm)) {
memcpy(&baudrate_parm, skb->data + HCI_COMMAND_HDR_SIZE, hdr->plen);
nxpdev->new_baudrate = __le32_to_cpu(baudrate_parm);
hci_cmd_sync_queue(hdev, nxp_set_baudrate_cmd, NULL, NULL);
goto free_skb;
}
break;
case HCI_NXP_IND_RESET:
if (hdr->plen == 1) {
hci_cmd_sync_queue(hdev, nxp_set_ind_reset, NULL, NULL);
goto free_skb;
}
break;
default:
break;
}
}
return btnxpuart_queue_skb(hdev, skb);
free_skb:
kfree_skb(skb);
return 0;
}
static struct sk_buff *nxp_dequeue(void *data)
{
struct btnxpuart_dev *nxpdev = (struct btnxpuart_dev *)data;
ps_start_timer(nxpdev);
return skb_dequeue(&nxpdev->txq);
}
/* btnxpuart based on serdev */
static void btnxpuart_tx_work(struct work_struct *work)
{
struct btnxpuart_dev *nxpdev = container_of(work, struct btnxpuart_dev,
tx_work);
struct serdev_device *serdev = nxpdev->serdev;
struct hci_dev *hdev = nxpdev->hdev;
struct sk_buff *skb;
int len;
if (ps_wakeup(nxpdev))
return;
while ((skb = nxp_dequeue(nxpdev))) {
len = serdev_device_write_buf(serdev, skb->data, skb->len);
hdev->stat.byte_tx += len;
skb_pull(skb, len);
if (skb->len > 0) {
skb_queue_head(&nxpdev->txq, skb);
continue;
}
switch (hci_skb_pkt_type(skb)) {
case HCI_COMMAND_PKT:
hdev->stat.cmd_tx++;
break;
case HCI_ACLDATA_PKT:
hdev->stat.acl_tx++;
break;
case HCI_SCODATA_PKT:
hdev->stat.sco_tx++;
break;
}
kfree_skb(skb);
}
clear_bit(BTNXPUART_TX_STATE_ACTIVE, &nxpdev->tx_state);
}
static int btnxpuart_open(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
int err = 0;
err = serdev_device_open(nxpdev->serdev);
if (err) {
bt_dev_err(hdev, "Unable to open UART device %s",
dev_name(&nxpdev->serdev->dev));
} else {
set_bit(BTNXPUART_SERDEV_OPEN, &nxpdev->tx_state);
}
return err;
}
static int btnxpuart_close(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
serdev_device_close(nxpdev->serdev);
skb_queue_purge(&nxpdev->txq);
if (!IS_ERR_OR_NULL(nxpdev->rx_skb)) {
kfree_skb(nxpdev->rx_skb);
nxpdev->rx_skb = NULL;
}
clear_bit(BTNXPUART_SERDEV_OPEN, &nxpdev->tx_state);
return 0;
}
static int btnxpuart_flush(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
/* Flush any pending characters */
serdev_device_write_flush(nxpdev->serdev);
skb_queue_purge(&nxpdev->txq);
cancel_work_sync(&nxpdev->tx_work);
if (!IS_ERR_OR_NULL(nxpdev->rx_skb)) {
kfree_skb(nxpdev->rx_skb);
nxpdev->rx_skb = NULL;
}
return 0;
}
static const struct h4_recv_pkt nxp_recv_pkts[] = {
{ H4_RECV_ACL, .recv = nxp_recv_acl_pkt },
{ H4_RECV_SCO, .recv = hci_recv_frame },
{ H4_RECV_EVENT, .recv = hci_recv_frame },
{ H4_RECV_ISO, .recv = hci_recv_frame },
{ NXP_RECV_CHIP_VER_V1, .recv = nxp_recv_chip_ver_v1 },
{ NXP_RECV_FW_REQ_V1, .recv = nxp_recv_fw_req_v1 },
{ NXP_RECV_CHIP_VER_V3, .recv = nxp_recv_chip_ver_v3 },
{ NXP_RECV_FW_REQ_V3, .recv = nxp_recv_fw_req_v3 },
};
static size_t btnxpuart_receive_buf(struct serdev_device *serdev,
const u8 *data, size_t count)
{
struct btnxpuart_dev *nxpdev = serdev_device_get_drvdata(serdev);
ps_start_timer(nxpdev);
nxpdev->rx_skb = h4_recv_buf(nxpdev->hdev, nxpdev->rx_skb, data, count,
nxp_recv_pkts, ARRAY_SIZE(nxp_recv_pkts));
if (IS_ERR(nxpdev->rx_skb)) {
int err = PTR_ERR(nxpdev->rx_skb);
/* Safe to ignore out-of-sync bootloader signatures */
if (!is_fw_downloading(nxpdev) &&
!ind_reset_in_progress(nxpdev))
bt_dev_err(nxpdev->hdev, "Frame reassembly failed (%d)", err);
return count;
}
if (!is_fw_downloading(nxpdev) &&
!ind_reset_in_progress(nxpdev))
nxpdev->hdev->stat.byte_rx += count;
return count;
}
static void btnxpuart_write_wakeup(struct serdev_device *serdev)
{
serdev_device_write_wakeup(serdev);
}
static const struct serdev_device_ops btnxpuart_client_ops = {
.receive_buf = btnxpuart_receive_buf,
.write_wakeup = btnxpuart_write_wakeup,
};
static int nxp_serdev_probe(struct serdev_device *serdev)
{
struct hci_dev *hdev;
struct btnxpuart_dev *nxpdev;
bdaddr_t ba = {0};
nxpdev = devm_kzalloc(&serdev->dev, sizeof(*nxpdev), GFP_KERNEL);
if (!nxpdev)
return -ENOMEM;
nxpdev->nxp_data = (struct btnxpuart_data *)device_get_match_data(&serdev->dev);
nxpdev->serdev = serdev;
serdev_device_set_drvdata(serdev, nxpdev);
serdev_device_set_client_ops(serdev, &btnxpuart_client_ops);
INIT_WORK(&nxpdev->tx_work, btnxpuart_tx_work);
skb_queue_head_init(&nxpdev->txq);
init_waitqueue_head(&nxpdev->fw_dnld_done_wait_q);
init_waitqueue_head(&nxpdev->check_boot_sign_wait_q);
device_property_read_u32(&nxpdev->serdev->dev, "fw-init-baudrate",
&nxpdev->fw_init_baudrate);
if (!nxpdev->fw_init_baudrate)
nxpdev->fw_init_baudrate = FW_INIT_BAUDRATE;
set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
crc8_populate_msb(crc8_table, POLYNOMIAL8);
/* Initialize and register HCI device */
hdev = hci_alloc_dev();
if (!hdev) {
dev_err(&serdev->dev, "Can't allocate HCI device\n");
return -ENOMEM;
}
nxpdev->hdev = hdev;
hdev->bus = HCI_UART;
hci_set_drvdata(hdev, nxpdev);
hdev->manufacturer = MANUFACTURER_NXP;
hdev->open = btnxpuart_open;
hdev->close = btnxpuart_close;
hdev->flush = btnxpuart_flush;
hdev->setup = nxp_setup;
hdev->post_init = nxp_post_init;
hdev->send = nxp_enqueue;
hdev->hw_error = nxp_hw_err;
hdev->shutdown = nxp_shutdown;
hdev->wakeup = nxp_wakeup;
hdev->reset = nxp_reset;
hdev->set_bdaddr = nxp_set_bdaddr;
SET_HCIDEV_DEV(hdev, &serdev->dev);
device_property_read_u8_array(&nxpdev->serdev->dev,
"local-bd-address",
(u8 *)&ba, sizeof(ba));
if (bacmp(&ba, BDADDR_ANY))
set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
if (hci_register_dev(hdev) < 0) {
dev_err(&serdev->dev, "Can't register HCI device\n");
goto probe_fail;
}
if (ps_setup(hdev))
goto probe_fail;
hci_devcd_register(hdev, nxp_coredump, nxp_coredump_hdr, NULL);
return 0;
probe_fail:
hci_free_dev(hdev);
return -ENODEV;
}
static void nxp_serdev_remove(struct serdev_device *serdev)
{
struct btnxpuart_dev *nxpdev = serdev_device_get_drvdata(serdev);
struct hci_dev *hdev = nxpdev->hdev;
if (is_fw_downloading(nxpdev)) {
set_bit(BTNXPUART_FW_DOWNLOAD_ABORT, &nxpdev->tx_state);
clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
wake_up_interruptible(&nxpdev->check_boot_sign_wait_q);
wake_up_interruptible(&nxpdev->fw_dnld_done_wait_q);
} else {
/* Restore FW baudrate to fw_init_baudrate if changed.
* This will ensure FW baudrate is in sync with
* driver baudrate in case this driver is re-inserted.
*/
if (nxpdev->current_baudrate != nxpdev->fw_init_baudrate) {
nxpdev->new_baudrate = nxpdev->fw_init_baudrate;
nxp_set_baudrate_cmd(hdev, NULL);
}
}
ps_cleanup(nxpdev);
hci_unregister_dev(hdev);
hci_free_dev(hdev);
}
#ifdef CONFIG_PM_SLEEP
static int nxp_serdev_suspend(struct device *dev)
{
struct btnxpuart_dev *nxpdev = dev_get_drvdata(dev);
struct ps_data *psdata = &nxpdev->psdata;
ps_control(psdata->hdev, PS_STATE_SLEEP);
return 0;
}
static int nxp_serdev_resume(struct device *dev)
{
struct btnxpuart_dev *nxpdev = dev_get_drvdata(dev);
struct ps_data *psdata = &nxpdev->psdata;
ps_control(psdata->hdev, PS_STATE_AWAKE);
return 0;
}
#endif
#ifdef CONFIG_DEV_COREDUMP
static void nxp_serdev_coredump(struct device *dev)
{
struct btnxpuart_dev *nxpdev = dev_get_drvdata(dev);
struct hci_dev *hdev = nxpdev->hdev;
if (hdev->dump.coredump)
hdev->dump.coredump(hdev);
}
#endif
static struct btnxpuart_data w8987_data __maybe_unused = {
.helper_fw_name = NULL,
.fw_name = FIRMWARE_W8987,
.fw_name_old = FIRMWARE_W8987_OLD,
};
static struct btnxpuart_data w8997_data __maybe_unused = {
.helper_fw_name = FIRMWARE_HELPER,
.fw_name = FIRMWARE_W8997,
.fw_name_old = FIRMWARE_W8997_OLD,
};
static const struct of_device_id nxpuart_of_match_table[] __maybe_unused = {
{ .compatible = "nxp,88w8987-bt", .data = &w8987_data },
{ .compatible = "nxp,88w8997-bt", .data = &w8997_data },
{ }
};
MODULE_DEVICE_TABLE(of, nxpuart_of_match_table);
static const struct dev_pm_ops nxp_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(nxp_serdev_suspend, nxp_serdev_resume)
};
static struct serdev_device_driver nxp_serdev_driver = {
.probe = nxp_serdev_probe,
.remove = nxp_serdev_remove,
.driver = {
.name = "btnxpuart",
.of_match_table = of_match_ptr(nxpuart_of_match_table),
.pm = &nxp_pm_ops,
#ifdef CONFIG_DEV_COREDUMP
.coredump = nxp_serdev_coredump,
#endif
},
};
module_serdev_device_driver(nxp_serdev_driver);
MODULE_AUTHOR("Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>");
MODULE_DESCRIPTION("NXP Bluetooth Serial driver");
MODULE_LICENSE("GPL");
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