1 files changed, 199 insertions, 0 deletions
diff --git a/tinyusb/hw/bsp/rp2040/family.c b/tinyusb/hw/bsp/rp2040/family.c
new file mode 100755
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+++ b/tinyusb/hw/bsp/rp2040/family.c
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+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ * Copyright (c) 2021, Ha Thach (tinyusb.org)
+ *
+ * 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.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "pico/stdlib.h"
+#include "pico/binary_info.h"
+#include "hardware/gpio.h"
+#include "hardware/sync.h"
+#include "hardware/structs/ioqspi.h"
+#include "hardware/structs/sio.h"
+
+#include "bsp/board.h"
+#include "board.h"
+
+#ifdef BUTTON_BOOTSEL
+// This example blinks the Picoboard LED when the BOOTSEL button is pressed.
+//
+// Picoboard has a button attached to the flash CS pin, which the bootrom
+// checks, and jumps straight to the USB bootcode if the button is pressed
+// (pulling flash CS low). We can check this pin in by jumping to some code in
+// SRAM (so that the XIP interface is not required), floating the flash CS
+// pin, and observing whether it is pulled low.
+//
+// This doesn't work if others are trying to access flash at the same time,
+// e.g. XIP streamer, or the other core.
+bool __no_inline_not_in_flash_func(get_bootsel_button)() {
+    const uint CS_PIN_INDEX = 1;
+
+    // Must disable interrupts, as interrupt handlers may be in flash, and we
+    // are about to temporarily disable flash access!
+    uint32_t flags = save_and_disable_interrupts();
+
+    // Set chip select to Hi-Z
+    hw_write_masked(&ioqspi_hw->io[CS_PIN_INDEX].ctrl,
+                    GPIO_OVERRIDE_LOW << IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_LSB,
+                    IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_BITS);
+
+    // Note we can't call into any sleep functions in flash right now
+    for (volatile int i = 0; i < 1000; ++i);
+
+    // The HI GPIO registers in SIO can observe and control the 6 QSPI pins.
+    // Note the button pulls the pin *low* when pressed.
+    bool button_state = (sio_hw->gpio_hi_in & (1u << CS_PIN_INDEX));
+
+    // Need to restore the state of chip select, else we are going to have a
+    // bad time when we return to code in flash!
+    hw_write_masked(&ioqspi_hw->io[CS_PIN_INDEX].ctrl,
+                    GPIO_OVERRIDE_NORMAL << IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_LSB,
+                    IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_BITS);
+
+    restore_interrupts(flags);
+
+    return button_state;
+}
+#endif
+
+//------------- Segger RTT retarget -------------//
+#if defined(LOGGER_RTT)
+
+// Logging with RTT
+// - If RTT Control Block is not found by 'Auto Detection` try to use 'Search Range` with '0x20000000 0x10000'
+// - SWD speed is rather slow around 1000Khz
+
+#include "pico/stdio/driver.h"
+#include "SEGGER_RTT.h"
+
+static void stdio_rtt_write (const char *buf, int length)
+{
+  SEGGER_RTT_Write(0, buf, length);
+}
+
+static int stdio_rtt_read (char *buf, int len)
+{
+  return SEGGER_RTT_Read(0, buf, len);
+}
+
+static stdio_driver_t stdio_rtt =
+{
+  .out_chars = stdio_rtt_write,
+  .out_flush = NULL,
+  .in_chars = stdio_rtt_read
+};
+
+void stdio_rtt_init(void)
+{
+  stdio_set_driver_enabled(&stdio_rtt, true);
+}
+
+#endif
+
+#ifdef UART_DEV
+static uart_inst_t *uart_inst;
+#endif
+
+void board_init(void)
+{
+#ifdef LED_PIN
+  bi_decl(bi_1pin_with_name(LED_PIN, "LED"));
+  gpio_init(LED_PIN);
+  gpio_set_dir(LED_PIN, GPIO_OUT);
+#endif
+
+  // Button
+#ifndef BUTTON_BOOTSEL
+#endif
+
+#if defined(UART_DEV) && defined(LIB_PICO_STDIO_UART)
+  bi_decl(bi_2pins_with_func(UART_TX_PIN, UART_TX_PIN, GPIO_FUNC_UART));
+  uart_inst = uart_get_instance(UART_DEV);
+  stdio_uart_init_full(uart_inst, CFG_BOARD_UART_BAUDRATE, UART_TX_PIN, UART_RX_PIN);
+#endif
+
+#if defined(LOGGER_RTT)
+  stdio_rtt_init();
+#endif
+
+  // todo probably set up device mode?
+#if TUSB_OPT_DEVICE_ENABLED
+
+#endif
+
+#if TUSB_OPT_HOST_ENABLED
+  // set portfunc to host !!!
+#endif
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+#ifdef LED_PIN
+  gpio_put(LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
+#endif
+}
+
+uint32_t board_button_read(void)
+{
+#ifdef BUTTON_BOOTSEL
+  return BUTTON_STATE_ACTIVE == get_bootsel_button();
+#else
+  return 0;
+#endif
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+#ifdef UART_DEV
+  for(int i=0;i<len;i++) {
+    buf[i] = uart_getc(uart_inst);
+  }
+  return len;
+#else
+  return 0;
+#endif
+}
+
+int board_uart_write(void const * buf, int len)
+{
+#ifdef UART_DEV
+  char const* bufch = (char const*) buf;
+  for(int i=0;i<len;i++) {
+    uart_putc(uart_inst, bufch[i]);
+  }
+  return len;
+#else
+  return 0;
+#endif
+}
+
+//--------------------------------------------------------------------+
+// USB Interrupt Handler
+// rp2040 implementation will install approriate handler when initializing
+// tinyusb. There is no need to forward IRQ from application
+//--------------------------------------------------------------------+