--- /dev/null
+// 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 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 {
+ bool fw_download_3M_baudrate;
+ 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;
+
+ 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_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 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_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));
+}
+
+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;
+
+ serdev_device_set_baudrate(nxpdev->serdev, HCI_NXP_PRI_BAUDRATE);
+ serdev_device_set_flow_control(nxpdev->serdev, 0);
+ 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, 1);
+ 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_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;
+ u32 requested_len;
+
+ if (!process_boot_signature(nxpdev))
+ goto free_skb;
+
+ req = (struct v1_data_req *)skb_pull_data(skb, sizeof(struct v1_data_req));
+ if (!req)
+ goto free_skb;
+
+ if ((req->len ^ req->len_comp) != 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);
+
+ if (nxp_data->fw_download_3M_baudrate) {
+ if (!nxpdev->timeout_changed) {
+ nxpdev->timeout_changed = nxp_fw_change_timeout(hdev, req->len);
+ goto free_skb;
+ }
+ if (!nxpdev->baudrate_changed) {
+ nxpdev->baudrate_changed = nxp_fw_change_baudrate(hdev, req->len);
+ if (nxpdev->baudrate_changed) {
+ serdev_device_set_baudrate(nxpdev->serdev,
+ HCI_NXP_SEC_BAUDRATE);
+ serdev_device_set_flow_control(nxpdev->serdev, 1);
+ nxpdev->current_baudrate = HCI_NXP_SEC_BAUDRATE;
+ }
+ goto free_skb;
+ }
+ }
+
+ if (nxp_request_firmware(hdev, nxp_data->fw_name))
+ goto free_skb;
+
+ requested_len = req->len;
+ if (requested_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 (requested_len & 0x01) {
+ /* The CRC did not match at the other end.
+ * Simply send the same bytes again.
+ */
+ requested_len = nxpdev->fw_v1_sent_bytes;
+ bt_dev_dbg(hdev, "CRC error. Resend %d bytes of FW.", requested_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 (requested_len == nxpdev->fw_v1_expected_len) {
+ if (requested_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 (requested_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 + requested_len <= nxpdev->fw->size)
+ serdev_device_write_buf(nxpdev->serdev,
+ nxpdev->fw->data + nxpdev->fw_dnld_v1_offset,
+ requested_len);
+ nxpdev->fw_v1_sent_bytes = requested_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(struct v3_start_ind));
+ struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
+
+ if (!process_boot_signature(nxpdev))
+ goto free_skb;
+
+ if (!nxp_request_firmware(hdev, nxp_get_fw_name_from_chipid(hdev, req->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;
+
+ if (!process_boot_signature(nxpdev))
+ goto free_skb;
+
+ req = (struct v3_data_req *)skb_pull_data(skb, sizeof(struct v3_data_req));
+ if (!req || !nxpdev->fw)
+ goto free_skb;
+
+ nxp_send_ack(NXP_ACK_V3, hdev);
+
+ if (!nxpdev->timeout_changed) {
+ nxpdev->timeout_changed = nxp_fw_change_timeout(hdev, req->len);
+ goto free_skb;
+ }
+
+ if (!nxpdev->baudrate_changed) {
+ nxpdev->baudrate_changed = nxp_fw_change_baudrate(hdev, req->len);
+ if (nxpdev->baudrate_changed) {
+ serdev_device_set_baudrate(nxpdev->serdev,
+ HCI_NXP_SEC_BAUDRATE);
+ serdev_device_set_flow_control(nxpdev->serdev, 1);
+ 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);
+
+ if (req->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. Please power cycle and try again");
+ goto free_skb;
+ }
+
+ serdev_device_write_buf(nxpdev->serdev,
+ nxpdev->fw->data + req->offset - nxpdev->fw_v3_offset_correction,
+ req->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, 0);
+ 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);
+ }
+
+ serdev_device_set_flow_control(nxpdev->serdev, 1);
+ 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);
+
+ 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_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 bool is_valid_bootloader_signature(const u8 *data, size_t count)
+{
+ if ((*data == NXP_V1_FW_REQ_PKT && count == sizeof(struct v1_data_req) + 1) ||
+ (*data == NXP_V3_FW_REQ_PKT && count == sizeof(struct v3_data_req) + 1) ||
+ (*data == NXP_V3_CHIP_VER_PKT && count == sizeof(struct v3_start_ind) + 1))
+ return true;
+ else
+ return false;
+}
+
+static int btnxpuart_receive_buf(struct serdev_device *serdev, const u8 *data,
+ size_t count)
+{
+ struct btnxpuart_dev *nxpdev = serdev_device_get_drvdata(serdev);
+
+ if (is_fw_downloading(nxpdev) && !is_valid_bootloader_signature(data, count)) {
+ /* Unknown bootloader signature, skip without returning error */
+ return count;
+ }
+
+ 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);
+
+ 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 = {
+ .fw_download_3M_baudrate = true,
+ .fw_name = FIRMWARE_W8987,
+};
+
+static struct btnxpuart_data w8997_data = {
+ .fw_download_3M_baudrate = false,
+ .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");
projects / platform / kernel / linux-starfive.git / commitdiff