drivers/cyw43: Remove old BTHCI UART backend.

It has been completely replaced by equivalent code in cyw43-driver.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

drivers/cyw43/README.md

@@ -1,17 +0,0 @@
-CYW43xx WiFi SoC driver
-=======================
-
-This is a driver for the CYW43xx WiFi SoC.
-
-There are four layers to the driver:
-
-1. SDIO bus interface, provided by the host device/system.
-
-2. Low-level CYW43xx interface, managing the bus, control messages, Ethernet
-   frames and asynchronous events.  Includes download of SoC firmware.  The
-   header file `cyw43_ll.h` defines the interface to this layer.
-
-3. Mid-level CYW43xx control, to control and set WiFi parameters and manage
-   events.  See `cyw43_ctrl.c`.
-
-4. TCP/IP bindings to lwIP.  See `cyw43_lwip.c`.

drivers/cyw43/cywbt.c

@@ -1,304 +0,0 @@
-/*
- * This file is part of the MicroPython project, http://micropython.org/
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2019-2020 Damien P. George
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include <stdio.h>
-#include <string.h>
-
-#include "py/runtime.h"
-#include "py/mphal.h"
-#include "extmod/mpbthci.h"
-
-#if MICROPY_PY_NETWORK_CYW43
-
-#include "lib/cyw43-driver/src/cyw43_config.h"
-#include "lib/cyw43-driver/firmware/cyw43_btfw_4343A1.h"
-
-// Provided by the port, and also possibly shared with the stack.
-extern uint8_t mp_bluetooth_hci_cmd_buf[4 + 256];
-
-/******************************************************************************/
-// CYW BT HCI low-level driver
-
-#ifdef CYW43_PIN_BT_CTS
-// This code is not portable and currently only builds on stm32 port.
-
-#include "pin_static_af.h"
-#include "uart.h"
-
-// Provided by the port.
-extern machine_uart_obj_t mp_bluetooth_hci_uart_obj;
-
-static void cywbt_wait_cts_low(void) {
-    mp_hal_pin_config(CYW43_PIN_BT_CTS, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_UP, 0);
-    for (int i = 0; i < 200; ++i) {
-        if (mp_hal_pin_read(CYW43_PIN_BT_CTS) == 0) {
-            break;
-        }
-        mp_hal_delay_ms(1);
-    }
-    mp_hal_pin_config_alt(CYW43_PIN_BT_CTS, MP_HAL_PIN_MODE_ALT,
-        MP_HAL_PIN_PULL_UP, AF_FN_UART, mp_bluetooth_hci_uart_obj.uart_id);
-}
-#endif
-
-static int cywbt_hci_cmd_raw(size_t len, uint8_t *buf) {
-    mp_bluetooth_hci_uart_write((void *)buf, len);
-    for (int c, i = 0; i < 6; ++i) {
-        while ((c = mp_bluetooth_hci_uart_readchar()) == -1) {
-            mp_event_wait_indefinite();
-        }
-        buf[i] = c;
-    }
-
-    // expect a command complete event (event 0x0e)
-    if (buf[0] != 0x04 || buf[1] != 0x0e) {
-        printf("unknown response: %02x %02x %02x %02x\n", buf[0], buf[1], buf[2], buf[3]);
-        return -1;
-    }
-
-    /*
-    if buf[3:6] != cmd[:3]:
-        print('response doesn\'t match cmd:', cmd, ev)
-        return b''
-        */
-
-    int sz = buf[2] - 3;
-    for (int c, i = 0; i < sz; ++i) {
-        while ((c = mp_bluetooth_hci_uart_readchar()) == -1) {
-            mp_event_wait_indefinite();
-        }
-        buf[i] = c;
-    }
-
-    return 0;
-}
-
-static int cywbt_hci_cmd(int ogf, int ocf, size_t param_len, const uint8_t *param_buf) {
-    uint8_t *buf = mp_bluetooth_hci_cmd_buf;
-    buf[0] = 0x01;
-    buf[1] = ocf;
-    buf[2] = ogf << 2 | ocf >> 8;
-    buf[3] = param_len;
-    if (param_len) {
-        memcpy(buf + 4, param_buf, param_len);
-    }
-    return cywbt_hci_cmd_raw(4 + param_len, buf);
-}
-
-static void put_le16(uint8_t *buf, uint16_t val) {
-    buf[0] = val;
-    buf[1] = val >> 8;
-}
-
-static void put_le32(uint8_t *buf, uint32_t val) {
-    buf[0] = val;
-    buf[1] = val >> 8;
-    buf[2] = val >> 16;
-    buf[3] = val >> 24;
-}
-
-static int cywbt_set_baudrate(uint32_t baudrate) {
-    uint8_t buf[6];
-    put_le16(buf, 0);
-    put_le32(buf + 2, baudrate);
-    return cywbt_hci_cmd(0x3f, 0x18, 6, buf);
-}
-
-// download firmware
-static int cywbt_download_firmware(const uint8_t *firmware) {
-    cywbt_hci_cmd(0x3f, 0x2e, 0, NULL);
-
-    bool last_packet = false;
-    while (!last_packet) {
-        uint8_t *buf = mp_bluetooth_hci_cmd_buf;
-        memcpy(buf + 1, firmware, 3);
-        firmware += 3;
-        last_packet = buf[1] == 0x4e;
-        if (buf[2] != 0xfc) {
-            printf("fail1 %02x\n", buf[2]);
-            break;
-        }
-        uint8_t len = buf[3];
-
-        memcpy(buf + 4, firmware, len);
-        firmware += len;
-
-        buf[0] = 1;
-        cywbt_hci_cmd_raw(4 + len, buf);
-        if (buf[0] != 0) {
-            printf("fail3 %02x\n", buf[0]);
-            break;
-        }
-    }
-
-    // RF switch must select high path during BT patch boot
-    #if MICROPY_HW_ENABLE_RF_SWITCH
-    mp_hal_pin_config(CYW43_PIN_WL_GPIO_1, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_UP, 0);
-    #endif
-    mp_hal_delay_ms(10); // give some time for CTS to go high
-    #ifdef CYW43_PIN_BT_CTS
-    cywbt_wait_cts_low();
-    #endif
-    #if MICROPY_HW_ENABLE_RF_SWITCH
-    // Select chip antenna (could also select external)
-    mp_hal_pin_config(CYW43_PIN_WL_GPIO_1, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_DOWN, 0);
-    #endif
-
-    mp_bluetooth_hci_uart_set_baudrate(115200);
-    cywbt_set_baudrate(MICROPY_HW_BLE_UART_BAUDRATE_SECONDARY);
-    mp_bluetooth_hci_uart_set_baudrate(MICROPY_HW_BLE_UART_BAUDRATE_SECONDARY);
-
-    return 0;
-}
-
-int mp_bluetooth_hci_controller_init(void) {
-    // This is called immediately after the UART is initialised during stack initialisation.
-
-    mp_hal_pin_output(CYW43_PIN_BT_REG_ON);
-    mp_hal_pin_low(CYW43_PIN_BT_REG_ON);
-    #ifdef CYW43_PIN_BT_HOST_WAKE
-    mp_hal_pin_input(CYW43_PIN_BT_HOST_WAKE);
-    #endif
-    #ifdef CYW43_PIN_BT_DEV_WAKE
-    mp_hal_pin_output(CYW43_PIN_BT_DEV_WAKE);
-    mp_hal_pin_low(CYW43_PIN_BT_DEV_WAKE);
-    #endif
-
-    #if MICROPY_HW_ENABLE_RF_SWITCH
-    // TODO don't select antenna if wifi is enabled
-    mp_hal_pin_config(CYW43_PIN_WL_GPIO_4, MP_HAL_PIN_MODE_OUTPUT, MP_HAL_PIN_PULL_NONE, 0); // RF-switch power
-    mp_hal_pin_high(CYW43_PIN_WL_GPIO_4); // Turn the RF-switch on
-    #endif
-
-    uint8_t buf[256];
-
-    mp_hal_pin_low(CYW43_PIN_BT_REG_ON);
-    mp_bluetooth_hci_uart_set_baudrate(115200);
-    mp_hal_delay_ms(100);
-    mp_hal_pin_high(CYW43_PIN_BT_REG_ON);
-    #ifdef CYW43_PIN_BT_CTS
-    cywbt_wait_cts_low();
-    #else
-    mp_hal_delay_ms(100);
-    #endif
-
-    // Reset
-    cywbt_hci_cmd(0x03, 0x0003, 0, NULL);
-
-    #ifdef MICROPY_HW_BLE_UART_BAUDRATE_DOWNLOAD_FIRMWARE
-    // Change baudrate
-    cywbt_set_baudrate(MICROPY_HW_BLE_UART_BAUDRATE_DOWNLOAD_FIRMWARE);
-    mp_bluetooth_hci_uart_set_baudrate(MICROPY_HW_BLE_UART_BAUDRATE_DOWNLOAD_FIRMWARE);
-    #endif
-
-    cywbt_download_firmware((const uint8_t *)&cyw43_btfw_4343A1[0]);
-
-    // Reset
-    cywbt_hci_cmd(0x03, 0x0003, 0, NULL);
-
-    // Set BD_ADDR (sent as little endian)
-    uint8_t bdaddr[6];
-    mp_hal_get_mac(MP_HAL_MAC_BDADDR, bdaddr);
-    buf[0] = bdaddr[5];
-    buf[1] = bdaddr[4];
-    buf[2] = bdaddr[3];
-    buf[3] = bdaddr[2];
-    buf[4] = bdaddr[1];
-    buf[5] = bdaddr[0];
-    cywbt_hci_cmd(0x3f, 0x0001, 6, buf);
-
-    // Set local name
-    // memset(buf, 0, 248);
-    // memcpy(buf, "PYBD-BLE", 8);
-    // cywbt_hci_cmd(0x03, 0x0013, 248, buf);
-
-    // Configure sleep mode
-    cywbt_hci_cmd(0x3f, 0x27, 12, (const uint8_t *)"\x01\x02\x02\x00\x00\x00\x01\x00\x00\x00\x00\x00");
-
-    // HCI_Write_LE_Host_Support
-    cywbt_hci_cmd(3, 109, 2, (const uint8_t *)"\x01\x00");
-
-    #ifdef CYW43_PIN_BT_DEV_WAKE
-    mp_hal_pin_high(CYW43_PIN_BT_DEV_WAKE); // let sleep
-    #endif
-
-    return 0;
-}
-
-int mp_bluetooth_hci_controller_deinit(void) {
-    mp_hal_pin_low(CYW43_PIN_BT_REG_ON);
-
-    return 0;
-}
-
-#ifdef CYW43_PIN_BT_DEV_WAKE
-static uint32_t bt_sleep_ticks;
-#endif
-
-int mp_bluetooth_hci_controller_sleep_maybe(void) {
-    #ifdef CYW43_PIN_BT_DEV_WAKE
-    if (mp_hal_pin_read(CYW43_PIN_BT_DEV_WAKE) == 0) {
-        if (mp_hal_ticks_ms() - bt_sleep_ticks > 500) {
-            mp_hal_pin_high(CYW43_PIN_BT_DEV_WAKE); // let sleep
-        }
-    }
-    #endif
-    return 0;
-}
-
-bool mp_bluetooth_hci_controller_woken(void) {
-    #ifdef CYW43_PIN_BT_HOST_WAKE
-    bool host_wake = mp_hal_pin_read(CYW43_PIN_BT_HOST_WAKE);
-    /*
-    // this is just for info/tracing purposes
-    static bool last_host_wake = false;
-    if (host_wake != last_host_wake) {
-        printf("HOST_WAKE change %d -> %d\n", last_host_wake, host_wake);
-        last_host_wake = host_wake;
-    }
-    */
-    return host_wake;
-    #else
-    return true;
-    #endif
-}
-
-int mp_bluetooth_hci_controller_wakeup(void) {
-    #ifdef CYW43_PIN_BT_DEV_WAKE
-    bt_sleep_ticks = mp_hal_ticks_ms();
-
-    if (mp_hal_pin_read(CYW43_PIN_BT_DEV_WAKE) == 1) {
-        mp_hal_pin_low(CYW43_PIN_BT_DEV_WAKE); // wake up
-        // Use delay_us rather than delay_ms to prevent running the scheduler (which
-        // might result in more BLE operations).
-        mp_hal_delay_us(5000); // can't go lower than this
-    }
-    #endif
-
-    return 0;
-}
-
-#endif