diff options
Diffstat (limited to 'drivers/bluetooth/btnxpuart.c')
| -rw-r--r-- | drivers/bluetooth/btnxpuart.c | 1352 |
1 files changed, 1352 insertions, 0 deletions
diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c new file mode 100644 index 000000000000..3a34d7c1475b --- /dev/null +++ b/drivers/bluetooth/btnxpuart.c @@ -0,0 +1,1352 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * NXP Bluetooth driver + * Copyright 2023 NXP + */ + +#include <linux/module.h> +#include <linux/kernel.h> + +#include <linux/serdev.h> +#include <linux/of.h> +#include <linux/skbuff.h> +#include <asm/unaligned.h> +#include <linux/firmware.h> +#include <linux/string.h> +#include <linux/crc8.h> +#include <linux/crc32.h> +#include <linux/string_helpers.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 FIRMWARE_W8987 "nxp/uartuart8987_bt.bin" +#define FIRMWARE_W8997 "nxp/uartuart8997_bt_v4.bin" +#define FIRMWARE_W9098 "nxp/uartuart9098_bt_v1.bin" +#define FIRMWARE_IW416 "nxp/uartiw416_bt_v0.bin" +#define FIRMWARE_IW612 "nxp/uartspi_n61x_v1.bin.se" +#define FIRMWARE_HELPER "nxp/helper_uart_3000000.bin" + +#define CHIP_ID_W9098 0x5c03 +#define CHIP_ID_IW416 0x7201 +#define CHIP_ID_IW612 0x7601 + +#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_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 + +/* Bluetooth vendor command : Sleep mode */ +#define HCI_NXP_AUTO_SLEEP_MODE 0xfc23 +/* Bluetooth vendor command : Wakeup method */ +#define HCI_NXP_WAKEUP_METHOD 0xfc53 +/* Bluetooth vendor command : Set operational baudrate */ +#define HCI_NXP_SET_OPER_SPEED 0xfc09 +/* Bluetooth vendor command: Independent Reset */ +#define HCI_NXP_IND_RESET 0xfcfc + +/* 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 hci_dev *hdev; + struct work_struct work; + struct timer_list ps_timer; +}; + +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; +}; + +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_v3_offset_correction; + u32 fw_v1_expected_len; + 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; + bool timeout_changed; + bool 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 + +#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; + +static u8 crc8_table[CRC8_TABLE_SIZE]; + +/* Default configurations */ +#define DEFAULT_H2C_WAKEUP_MODE WAKEUP_METHOD_BREAK +#define DEFAULT_PS_MODE PS_MODE_DISABLE +#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)); +} + +static void ps_cancel_timer(struct btnxpuart_dev *nxpdev) +{ + struct ps_data *psdata = &nxpdev->psdata; + + flush_work(&psdata->work); + del_timer_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; + + if (psdata->ps_state == ps_state || + !test_bit(BTNXPUART_SERDEV_OPEN, &nxpdev->tx_state)) + return; + + switch (psdata->cur_h2c_wakeupmode) { + 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); + 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; + 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_init_work(struct hci_dev *hdev) +{ + struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev); + struct ps_data *psdata = &nxpdev->psdata; + + psdata->h2c_ps_interval = PS_DEFAULT_TIMEOUT_PERIOD_MS; + psdata->ps_state = PS_STATE_AWAKE; + psdata->target_ps_mode = DEFAULT_PS_MODE; + psdata->hdev = hdev; + psdata->c2h_wakeupmode = BT_HOST_WAKEUP_METHOD_NONE; + psdata->c2h_wakeup_gpio = 0xff; + + switch (DEFAULT_H2C_WAKEUP_MODE) { + case WAKEUP_METHOD_DTR: + psdata->h2c_wakeupmode = WAKEUP_METHOD_DTR; + break; + case WAKEUP_METHOD_BREAK: + default: + psdata->h2c_wakeupmode = WAKEUP_METHOD_BREAK; + break; + } + psdata->cur_psmode = PS_MODE_DISABLE; + psdata->cur_h2c_wakeupmode = WAKEUP_METHOD_INVALID; + INIT_WORK(&psdata->work, ps_work_func); + + return 0; +} + +static void ps_init_timer(struct hci_dev *hdev) +{ + struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev); + struct ps_data *psdata = &nxpdev->psdata; + + timer_setup(&psdata->ps_timer, ps_timeout_func, 0); +} + +static void ps_wakeup(struct btnxpuart_dev *nxpdev) +{ + struct ps_data *psdata = &nxpdev->psdata; + + if (psdata->ps_state != PS_STATE_AWAKE) { + psdata->ps_cmd = PS_CMD_EXIT_PS; + schedule_work(&psdata->work); + } +} + +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; + switch (psdata->h2c_wakeupmode) { + 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; + } + pcmd.h2c_wakeup_gpio = 0xff; + + 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; + + 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); + + switch (psdata->h2c_wakeupmode) { + case 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: + serdev_device_break_ctl(nxpdev->serdev, -1); + usleep_range(5000, 10000); + serdev_device_break_ctl(nxpdev->serdev, 0); + usleep_range(5000, 10000); + break; + } + if (psdata->cur_h2c_wakeupmode != psdata->h2c_wakeupmode) + hci_cmd_sync_queue(hdev, send_wakeup_method_cmd, NULL, NULL); + if (psdata->cur_psmode != psdata->target_ps_mode) + hci_cmd_sync_queue(hdev, send_ps_cmd, NULL, NULL); +} + +/* 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->fw_v3_offset_correction = 0; + nxpdev->baudrate_changed = false; + nxpdev->timeout_changed = false; + 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 and CTS becomes low */ + err = wait_event_interruptible_timeout(nxpdev->fw_dnld_done_wait_q, + !test_bit(BTNXPUART_FW_DOWNLOADING, + &nxpdev->tx_state), + msecs_to_jiffies(60000)); + if (err == 0) { + bt_dev_err(hdev, "FW Download Timeout."); + return -ETIMEDOUT; + } + + serdev_device_set_flow_control(nxpdev->serdev, true); + err = serdev_device_wait_for_cts(nxpdev->serdev, 1, 60000); + if (err < 0) { + bt_dev_err(hdev, "CTS is still high. FW Download failed."); + return err; + } + release_firmware(nxpdev->fw); + memset(nxpdev->fw_name, 0, sizeof(nxpdev->fw_name)); + + /* Allow the downloaded FW to initialize */ + usleep_range(800 * USEC_PER_MSEC, 1 * USEC_PER_SEC); + + 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; + + 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 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) +{ + struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev); + int err = 0; + + if (!strlen(nxpdev->fw_name)) { + snprintf(nxpdev->fw_name, MAX_FW_FILE_NAME_LEN, "%s", fw_name); + + bt_dev_dbg(hdev, "Request Firmware: %s", nxpdev->fw_name); + err = request_firmware(&nxpdev->fw, nxpdev->fw_name, &hdev->dev); + 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 = 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) { + nxpdev->timeout_changed = nxp_fw_change_timeout(hdev, + len); + goto free_skb; + } + if (!nxpdev->baudrate_changed) { + nxpdev->baudrate_changed = nxp_fw_change_baudrate(hdev, + len); + if (nxpdev->baudrate_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)) + goto free_skb; + } else if (nxp_data->helper_fw_name && !nxpdev->helper_downloaded) { + if (nxp_request_firmware(hdev, nxp_data->helper_fw_name)) + goto free_skb; + } + + if (!len) { + bt_dev_dbg(hdev, "FW Downloaded Successfully: %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) +{ + 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; + default: + bt_dev_err(hdev, "Unknown chip signature %04x", chipid); + break; + } + return fw_name; +} + +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); + u16 chip_id; + + if (!process_boot_signature(nxpdev)) + goto free_skb; + + chip_id = le16_to_cpu(req->chip_id); + if (!nxp_request_firmware(hdev, nxp_get_fw_name_from_chipid(hdev, + chip_id))) + nxp_send_ack(NXP_ACK_V3, hdev); + +free_skb: + kfree_skb(skb); + return 0; +} + +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; + __u32 offset; + + if (!process_boot_signature(nxpdev)) + goto free_skb; + + req = skb_pull_data(skb, sizeof(*req)); + if (!req || !nxpdev->fw) + goto free_skb; + + nxp_send_ack(NXP_ACK_V3, hdev); + + len = __le16_to_cpu(req->len); + + if (!nxpdev->timeout_changed) { + nxpdev->timeout_changed = nxp_fw_change_timeout(hdev, len); + goto free_skb; + } + + if (!nxpdev->baudrate_changed) { + nxpdev->baudrate_changed = nxp_fw_change_baudrate(hdev, len); + if (nxpdev->baudrate_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 (req->len == 0) { + bt_dev_dbg(hdev, "FW Downloaded Successfully: %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; + } + if (req->error) + bt_dev_dbg(hdev, "FW Download received err 0x%02x from chip", + req->error); + + 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; + } + + serdev_device_write_buf(nxpdev->serdev, nxpdev->fw->data + offset - + nxpdev->fw_v3_offset_correction, len); + +free_skb: + 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_set_ind_reset(struct hci_dev *hdev, void *data) +{ + struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev); + struct sk_buff *skb; + u8 *status; + u8 pcmd = 0; + int err = 0; + + skb = nxp_drv_send_cmd(hdev, HCI_NXP_IND_RESET, 1, &pcmd); + if (IS_ERR(skb)) + return PTR_ERR(skb); + + status = skb_pull_data(skb, 1); + if (!status || *status) + goto free_skb; + + set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state); + err = nxp_download_firmware(hdev); + if (err < 0) + goto free_skb; + serdev_device_set_baudrate(nxpdev->serdev, nxpdev->fw_init_baudrate); + nxpdev->current_baudrate = nxpdev->fw_init_baudrate; + if (nxpdev->current_baudrate != HCI_NXP_SEC_BAUDRATE) { + nxpdev->new_baudrate = HCI_NXP_SEC_BAUDRATE; + nxp_set_baudrate_cmd(hdev, NULL); + } + hci_cmd_sync_queue(hdev, send_wakeup_method_cmd, NULL, NULL); + hci_cmd_sync_queue(hdev, send_ps_cmd, NULL, NULL); + +free_skb: + kfree_skb(skb); + return err; +} + +/* NXP protocol */ +static int nxp_check_boot_sign(struct btnxpuart_dev *nxpdev) +{ + serdev_device_set_baudrate(nxpdev->serdev, HCI_NXP_PRI_BAUDRATE); + 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_setup(struct hci_dev *hdev) +{ + struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev); + int err = 0; + + set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state); + init_waitqueue_head(&nxpdev->fw_dnld_done_wait_q); + init_waitqueue_head(&nxpdev->check_boot_sign_wait_q); + + 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_dbg(hdev, "FW already running."); + clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state); + } + + 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; + serdev_device_set_baudrate(nxpdev->serdev, nxpdev->fw_init_baudrate); + nxpdev->current_baudrate = nxpdev->fw_init_baudrate; + + if (nxpdev->current_baudrate != HCI_NXP_SEC_BAUDRATE) { + nxpdev->new_baudrate = HCI_NXP_SEC_BAUDRATE; + hci_cmd_sync_queue(hdev, nxp_set_baudrate_cmd, NULL, NULL); + } + + ps_init(hdev); + + return 0; +} + +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 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_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_wakeup(nxpdev); + 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; + + 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); + break; + } + + 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); + + ps_wakeup(nxpdev); + serdev_device_close(nxpdev->serdev); + 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); + + kfree_skb(nxpdev->rx_skb); + nxpdev->rx_skb = NULL; + + return 0; +} + +static const struct h4_recv_pkt nxp_recv_pkts[] = { + { H4_RECV_ACL, .recv = hci_recv_frame }, + { H4_RECV_SCO, .recv = hci_recv_frame }, + { H4_RECV_EVENT, .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 int 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)) + return count; + bt_dev_err(nxpdev->hdev, "Frame reassembly failed (%d)", err); + nxpdev->rx_skb = NULL; + return err; + } + 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; + + 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); + + 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->send = nxp_enqueue; + SET_HCIDEV_DEV(hdev, &serdev->dev); + + if (hci_register_dev(hdev) < 0) { + dev_err(&serdev->dev, "Can't register HCI device\n"); + hci_free_dev(hdev); + return -ENODEV; + } + + ps_init_work(hdev); + ps_init_timer(hdev); + + return 0; +} + +static void nxp_serdev_remove(struct serdev_device *serdev) +{ + struct btnxpuart_dev *nxpdev = serdev_device_get_drvdata(serdev); + struct hci_dev *hdev = nxpdev->hdev; + + /* 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_cancel_timer(nxpdev); + hci_unregister_dev(hdev); + hci_free_dev(hdev); +} + +static struct btnxpuart_data w8987_data = { + .helper_fw_name = NULL, + .fw_name = FIRMWARE_W8987, +}; + +static struct btnxpuart_data w8997_data = { + .helper_fw_name = FIRMWARE_HELPER, + .fw_name = FIRMWARE_W8997, +}; + +static const struct of_device_id nxpuart_of_match_table[] = { + { .compatible = "nxp,88w8987-bt", .data = &w8987_data }, + { .compatible = "nxp,88w8997-bt", .data = &w8997_data }, + { } +}; +MODULE_DEVICE_TABLE(of, nxpuart_of_match_table); + +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), + }, +}; + +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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