Merge pull request #569 from kkitayam/add_support_for_frdm_kl25z

add support for frdm_kl25z

hw/bsp/board_mcu.h

@@ -46,7 +46,7 @@
   #include "chip.h"
 
 #elif CFG_TUSB_MCU == OPT_MCU_LPC51UXX || CFG_TUSB_MCU == OPT_MCU_LPC54XXX || \
-      CFG_TUSB_MCU == OPT_MCU_LPC55XX
+      CFG_TUSB_MCU == OPT_MCU_LPC55XX  || CFG_TUSB_MCU == OPT_MCU_MKL25ZXX
   #include "fsl_device_registers.h"
 
 #elif CFG_TUSB_MCU == OPT_MCU_NRF5X

hw/bsp/frdm_kl25z/board.mk

@@ -0,0 +1,46 @@
+CFLAGS += \
+  -mthumb \
+  -mabi=aapcs \
+  -mcpu=cortex-m0plus \
+  -DCPU_MKL25Z128VLK4 \
+  -DCFG_TUSB_MCU=OPT_MCU_MKL25ZXX
+
+# mcu driver cause following warnings
+CFLAGS += -Wno-error=unused-parameter
+
+MCU_DIR = hw/mcu/nxp/sdk/devices/MKL25Z4
+
+# All source paths should be relative to the top level.
+LD_FILE = $(MCU_DIR)/gcc/MKL25Z128xxx4_flash.ld
+
+SRC_C += \
+	$(MCU_DIR)/system_MKL25Z4.c \
+	$(MCU_DIR)/project_template/clock_config.c \
+	$(MCU_DIR)/drivers/fsl_clock.c \
+	$(MCU_DIR)/drivers/fsl_gpio.c \
+	$(MCU_DIR)/drivers/fsl_lpsci.c
+
+INC += \
+	$(TOP)/hw/bsp/$(BOARD) \
+	$(TOP)/$(MCU_DIR)/../../CMSIS/Include \
+	$(TOP)/$(MCU_DIR) \
+	$(TOP)/$(MCU_DIR)/drivers \
+	$(TOP)/$(MCU_DIR)/project_template \
+
+SRC_S += $(MCU_DIR)/gcc/startup_MKL25Z4.S
+
+# For TinyUSB port source
+VENDOR = nxp
+CHIP_FAMILY = khci
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM0
+
+# For flash-jlink target
+JLINK_DEVICE = MKL25Z128xxx4
+
+# For flash-pyocd target
+PYOCD_TARGET = mkl25zl128
+
+# flash using pyocd
+flash: flash-pyocd

hw/bsp/frdm_kl25z/frdm_kl25z.c

@@ -0,0 +1,148 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018, hathach (tinyusb.org)
+ * Copyright (c) 2020, Koji Kitayama
+ *
+ * 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 "../board.h"
+#include "fsl_device_registers.h"
+#include "fsl_gpio.h"
+#include "fsl_port.h"
+#include "fsl_clock.h"
+#include "fsl_lpsci.h"
+
+#include "clock_config.h"
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USB0_IRQHandler(void)
+{
+  tud_int_handler(0);
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM DECLARATION
+//--------------------------------------------------------------------+
+// LED
+#define LED_PINMUX            IOMUXC_GPIO_AD_B0_09_GPIO1_IO09
+#define LED_PORT              GPIOB
+#define LED_PIN_CLOCK         kCLOCK_PortB
+#define LED_PIN_PORT          PORTB
+#define LED_PIN               19U
+#define LED_PIN_FUNCTION      kPORT_MuxAsGpio
+#define LED_STATE_ON          0
+
+// UART
+#define UART_PORT             UART0
+#define UART_PIN_CLOCK        kCLOCK_PortA
+#define UART_PIN_PORT         PORTA
+#define UART_PIN_RX           1u
+#define UART_PIN_TX           2u
+#define UART_PIN_FUNCTION     kPORT_MuxAlt2
+#define SOPT5_UART0RXSRC_UART_RX      0x00u   /*!< UART0 receive data source select: UART0_RX pin */
+#define SOPT5_UART0TXSRC_UART_TX      0x00u   /*!< UART0 transmit data source select: UART0_TX pin */
+
+const uint8_t dcd_data[] = { 0x00 };
+
+void board_init(void)
+{
+  BOARD_BootClockRUN();
+  SystemCoreClockUpdate();
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  // 1ms tick timer
+  SysTick_Config(SystemCoreClock / 1000);
+#elif CFG_TUSB_OS == OPT_OS_FREERTOS
+  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
+  NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
+#endif
+
+  // LED
+  CLOCK_EnableClock(LED_PIN_CLOCK);
+  PORT_SetPinMux(LED_PIN_PORT, LED_PIN, LED_PIN_FUNCTION);
+  gpio_pin_config_t led_config = { kGPIO_DigitalOutput, 0 };
+  GPIO_PinInit(LED_PORT, LED_PIN, &led_config);
+  board_led_write(true);
+
+  // UART
+  CLOCK_EnableClock(UART_PIN_CLOCK);
+  PORT_SetPinMux(UART_PIN_PORT, UART_PIN_RX, UART_PIN_FUNCTION);
+  PORT_SetPinMux(UART_PIN_PORT, UART_PIN_TX, UART_PIN_FUNCTION);
+  SIM->SOPT5 = ((SIM->SOPT5 &
+    (~(SIM_SOPT5_UART0TXSRC_MASK | SIM_SOPT5_UART0RXSRC_MASK)))
+      | SIM_SOPT5_UART0TXSRC(SOPT5_UART0TXSRC_UART_TX)
+      | SIM_SOPT5_UART0RXSRC(SOPT5_UART0RXSRC_UART_RX)
+    );
+
+  lpsci_config_t uart_config;
+  CLOCK_SetLpsci0Clock(1);
+  LPSCI_GetDefaultConfig(&uart_config);
+  uart_config.baudRate_Bps = CFG_BOARD_UART_BAUDRATE;
+  uart_config.enableTx = true;
+  uart_config.enableRx = true;
+  LPSCI_Init(UART_PORT, &uart_config, CLOCK_GetPllFllSelClkFreq());
+
+  // USB
+  CLOCK_EnableUsbfs0Clock(kCLOCK_UsbSrcPll0, CLOCK_GetFreq(kCLOCK_PllFllSelClk));
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+  GPIO_WritePinOutput(LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
+}
+
+uint32_t board_button_read(void)
+{
+  return 0;
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+  LPSCI_ReadBlocking(UART_PORT, buf, len);
+  return len;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+  LPSCI_WriteBlocking(UART_PORT, (uint8_t*)buf, len);
+  return len;
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void SysTick_Handler(void)
+{
+  system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+#endif

src/portable/nxp/khci/dcd_khci.c

@@ -0,0 +1,477 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Koji Kitayama
+ *
+ * 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 "tusb_option.h"
+
+#if TUSB_OPT_DEVICE_ENABLED && ( CFG_TUSB_MCU == OPT_MCU_MKL25ZXX )
+
+#include "fsl_device_registers.h"
+#define KHCI        USB0
+
+#include "device/dcd.h"
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM DECLARATION
+//--------------------------------------------------------------------+
+
+enum {
+  TOK_PID_OUT   = 0x1u,
+  TOK_PID_IN    = 0x9u,
+  TOK_PID_SETUP = 0xDu,
+};
+
+typedef struct TU_ATTR_PACKED
+{
+  union {
+    uint32_t head;
+    struct {
+      union {
+        struct {
+          uint16_t          :  2;
+          uint16_t tok_pid  :  4;
+          uint16_t data     :  1;
+          uint16_t own      :  1;
+          uint16_t          :  8;
+        };
+        struct {
+          uint16_t          :  2;
+          uint16_t bdt_stall:  1;
+          uint16_t dts      :  1;
+          uint16_t ninc     :  1;
+          uint16_t keep     :  1;
+          uint16_t          : 10;
+        };
+      };
+      uint16_t bc          : 10;
+      uint16_t             :  6;
+    };
+  };
+  uint8_t *addr;
+}buffer_descriptor_t;
+
+TU_VERIFY_STATIC( sizeof(buffer_descriptor_t) == 8, "size is not correct" );
+
+typedef struct TU_ATTR_PACKED
+{
+  union {
+    uint32_t state;
+    struct {
+      uint32_t max_packet_size :11;
+      uint32_t                 : 5;
+      uint32_t odd             : 1;
+      uint32_t                 :15;
+    };
+  };
+  uint16_t length;
+  uint16_t remaining;
+}endpoint_state_t;
+
+TU_VERIFY_STATIC( sizeof(endpoint_state_t) == 8, "size is not correct" );
+
+typedef struct
+{
+  union {
+    /* [#EP][OUT,IN][EVEN,ODD] */
+    buffer_descriptor_t bdt[16][2][2];
+    uint16_t            bda[512];
+  };
+  TU_ATTR_ALIGNED(4) union {
+    endpoint_state_t endpoint[16][2];
+    endpoint_state_t endpoint_unified[16 * 2];
+  };
+  uint8_t setup_packet[8];
+  uint8_t addr;
+}dcd_data_t;
+
+//--------------------------------------------------------------------+
+// INTERNAL OBJECT & FUNCTION DECLARATION
+//--------------------------------------------------------------------+
+// BDT(Buffer Descriptor Table) must be 256-byte aligned
+CFG_TUSB_MEM_SECTION TU_ATTR_ALIGNED(512) static dcd_data_t _dcd;
+
+TU_VERIFY_STATIC( sizeof(_dcd.bdt) == 512, "size is not correct" );
+
+static void prepare_next_setup_packet(uint8_t rhport)
+{
+  const unsigned out_odd = _dcd.endpoint[0][0].odd;
+  const unsigned in_odd  = _dcd.endpoint[0][1].odd;
+  if (_dcd.bdt[0][0][out_odd].own) {
+    TU_LOG1("DCD fail to prepare the next SETUP %d %d\r\n", out_odd, in_odd);
+    return;
+  }
+  _dcd.bdt[0][0][out_odd].data     = 0;
+  _dcd.bdt[0][0][out_odd ^ 1].data = 1;
+  _dcd.bdt[0][1][in_odd].data      = 1;
+  _dcd.bdt[0][1][in_odd ^ 1].data  = 0;
+  dcd_edpt_xfer(rhport, tu_edpt_addr(0, TUSB_DIR_OUT),
+                _dcd.setup_packet, sizeof(_dcd.setup_packet));
+}
+
+static void process_stall(uint8_t rhport)
+{
+  if (KHCI->ENDPOINT[0].ENDPT & USB_ENDPT_EPSTALL_MASK) {
+    /* clear stall condition of the control pipe */
+    prepare_next_setup_packet(rhport);
+    KHCI->ENDPOINT[0].ENDPT &= ~USB_ENDPT_EPSTALL_MASK;
+  }
+}
+
+static void process_tokdne(uint8_t rhport)
+{
+  const unsigned s = KHCI->STAT;
+  KHCI->ISTAT = USB_ISTAT_TOKDNE_MASK; /* fetch the next token if received */
+  buffer_descriptor_t *bd = (buffer_descriptor_t *)&_dcd.bda[s];
+  endpoint_state_t    *ep = &_dcd.endpoint_unified[s >> 3];
+  unsigned odd = (s & USB_STAT_ODD_MASK) ? 1 : 0;
+
+  /* fetch pid before discarded by the next steps */
+  const unsigned pid = bd->tok_pid;
+  /* reset values for a next transfer */
+  bd->bdt_stall = 0;
+  bd->dts       = 1;
+  bd->ninc      = 0;
+  bd->keep      = 0;
+  /* update the odd variable to prepare for the next transfer */
+  ep->odd       = odd ^ 1;
+  if (pid == TOK_PID_SETUP) {
+    dcd_event_setup_received(rhport, bd->addr, true);
+    KHCI->CTL &= ~USB_CTL_TXSUSPENDTOKENBUSY_MASK;
+    return;
+  }
+  if (s >> 4) {
+    TU_LOG1("TKDNE %x\r\n", s);
+  }
+
+  const unsigned bc = bd->bc;
+  const unsigned remaining = ep->remaining - bc;
+  if (remaining && bc == ep->max_packet_size) {
+    /* continue the transferring consecutive data */
+    ep->remaining = remaining;
+    const int next_remaining = remaining - ep->max_packet_size;
+    if (next_remaining > 0) {
+      /* prepare to the after next transfer */
+      bd->addr += ep->max_packet_size * 2;
+      bd->bc    = next_remaining > ep->max_packet_size ? ep->max_packet_size: next_remaining;
+      __DSB();
+      bd->own   = 1; /* the own bit must set after addr */
+    }
+    return;
+  }
+  const unsigned length = ep->length;
+  dcd_event_xfer_complete(rhport,
+                          ((s & USB_STAT_TX_MASK) << 4) | (s >> USB_STAT_ENDP_SHIFT),
+                          length - remaining, XFER_RESULT_SUCCESS, true);
+  if (0 == (s & USB_STAT_ENDP_MASK) && 0 == length) {
+    /* After completion a ZLP of control transfer,
+     * it prepares for the next steup transfer. */
+    if (_dcd.addr) {
+      /* When the transfer was the SetAddress,
+       * the device address should be updated here. */
+      KHCI->ADDR = _dcd.addr;
+      _dcd.addr  = 0;
+    }
+    prepare_next_setup_packet(rhport);
+  }
+}
+
+static void process_bus_reset(uint8_t rhport)
+{
+  KHCI->USBCTRL &= ~USB_USBCTRL_SUSP_MASK;
+  KHCI->CTL     |= USB_CTL_ODDRST_MASK;
+  KHCI->ADDR     = 0;
+  KHCI->INTEN    = (KHCI->INTEN & ~USB_INTEN_RESUMEEN_MASK) | USB_INTEN_SLEEPEN_MASK;
+
+  KHCI->ENDPOINT[0].ENDPT = USB_ENDPT_EPHSHK_MASK | USB_ENDPT_EPRXEN_MASK | USB_ENDPT_EPTXEN_MASK;
+  for (unsigned i = 1; i < 16; ++i) {
+    KHCI->ENDPOINT[i].ENDPT = 0;
+  }
+  buffer_descriptor_t *bd = _dcd.bdt[0][0];
+  for (unsigned i = 0; i < sizeof(_dcd.bdt)/sizeof(*bd); ++i, ++bd) {
+    bd->head = 0;
+  }
+  const endpoint_state_t ep0 = {
+    .max_packet_size = CFG_TUD_ENDPOINT0_SIZE,
+    .odd             = 0,
+    .length          = 0,
+    .remaining       = 0,
+  };
+  _dcd.endpoint[0][0] = ep0;
+  _dcd.endpoint[0][1] = ep0;
+  tu_memclr(_dcd.endpoint[1], sizeof(_dcd.endpoint) - sizeof(_dcd.endpoint[0]));
+  _dcd.addr = 0;
+  prepare_next_setup_packet(rhport);
+  KHCI->CTL &= ~USB_CTL_ODDRST_MASK;
+  dcd_event_bus_signal(rhport, DCD_EVENT_BUS_RESET, true);
+}
+
+static void process_bus_inactive(uint8_t rhport)
+{
+  (void) rhport;
+  const unsigned inten = KHCI->INTEN;
+  KHCI->INTEN    = (inten & ~USB_INTEN_SLEEPEN_MASK) | USB_INTEN_RESUMEEN_MASK;
+  KHCI->USBCTRL |= USB_USBCTRL_SUSP_MASK;
+  dcd_event_bus_signal(rhport, DCD_EVENT_SUSPEND, true);
+}
+
+static void process_bus_active(uint8_t rhport)
+{
+  (void) rhport;
+  KHCI->USBCTRL &= ~USB_USBCTRL_SUSP_MASK;
+  const unsigned inten = KHCI->INTEN;
+  KHCI->INTEN    = (inten & ~USB_INTEN_RESUMEEN_MASK) | USB_INTEN_SLEEPEN_MASK;
+  dcd_event_bus_signal(rhport, DCD_EVENT_RESUME, true);
+}
+
+/*------------------------------------------------------------------*/
+/* Device API
+ *------------------------------------------------------------------*/
+void dcd_init(uint8_t rhport)
+{
+  (void) rhport;
+
+  KHCI->USBTRC0 |= USB_USBTRC0_USBRESET_MASK;
+  while (KHCI->USBTRC0 & USB_USBTRC0_USBRESET_MASK);
+  tu_memclr(&_dcd, sizeof(_dcd));
+  KHCI->USBTRC0 |= TU_BIT(6); /* software must set this bit to 1 */
+  KHCI->BDTPAGE1 = (uint8_t)((uintptr_t)_dcd.bdt >>  8);
+  KHCI->BDTPAGE2 = (uint8_t)((uintptr_t)_dcd.bdt >> 16);
+  KHCI->BDTPAGE3 = (uint8_t)((uintptr_t)_dcd.bdt >> 24);
+
+  dcd_connect(rhport);
+  NVIC_ClearPendingIRQ(USB0_IRQn);
+}
+
+void dcd_int_enable(uint8_t rhport)
+{
+  (void) rhport;
+  KHCI->INTEN = USB_INTEN_USBRSTEN_MASK | USB_INTEN_TOKDNEEN_MASK |
+    USB_INTEN_SLEEPEN_MASK | USB_INTEN_ERROREN_MASK | USB_INTEN_STALLEN_MASK;
+  NVIC_EnableIRQ(USB0_IRQn);
+}
+
+void dcd_int_disable(uint8_t rhport)
+{
+  (void) rhport;
+  NVIC_DisableIRQ(USB0_IRQn);
+  KHCI->INTEN = 0;
+}
+
+void dcd_set_address(uint8_t rhport, uint8_t dev_addr)
+{
+  (void) rhport;
+  _dcd.addr = dev_addr & 0x7F;
+  /* Response with status first before changing device address */
+  dcd_edpt_xfer(rhport, tu_edpt_addr(0, TUSB_DIR_IN), NULL, 0);
+}
+
+void dcd_remote_wakeup(uint8_t rhport)
+{
+  (void) rhport;
+  unsigned cnt = SystemCoreClock / 100;
+  KHCI->CTL |= USB_CTL_RESUME_MASK;
+  while (cnt--) __NOP();
+  KHCI->CTL &= ~USB_CTL_RESUME_MASK;
+}
+
+void dcd_connect(uint8_t rhport)
+{
+  (void) rhport;
+  KHCI->USBCTRL  = 0;
+  KHCI->CONTROL |= USB_CONTROL_DPPULLUPNONOTG_MASK;
+  KHCI->CTL     |= USB_CTL_USBENSOFEN_MASK;
+}
+
+void dcd_disconnect(uint8_t rhport)
+{
+  (void) rhport;
+  KHCI->CTL      = 0;
+  KHCI->CONTROL &= ~USB_CONTROL_DPPULLUPNONOTG_MASK;
+}
+
+//--------------------------------------------------------------------+
+// Endpoint API
+//--------------------------------------------------------------------+
+bool dcd_edpt_open(uint8_t rhport, tusb_desc_endpoint_t const * ep_desc)
+{
+  (void) rhport;
+
+  const unsigned ep_addr  = ep_desc->bEndpointAddress;
+  const unsigned epn      = ep_addr & 0xFu;
+  const unsigned dir      = (ep_addr & TUSB_DIR_IN_MASK) ? TUSB_DIR_IN : TUSB_DIR_OUT;
+  const unsigned xfer     = ep_desc->bmAttributes.xfer;
+  endpoint_state_t *ep    = &_dcd.endpoint[epn][dir];
+  const unsigned odd      = ep->odd;
+  buffer_descriptor_t *bd = &_dcd.bdt[epn][dir][0];
+
+  /* No support for control transfer */
+  TU_ASSERT(epn && (xfer != TUSB_XFER_CONTROL));
+
+  ep->max_packet_size = ep_desc->wMaxPacketSize.size;
+  unsigned val = USB_ENDPT_EPCTLDIS_MASK;
+  val |= (xfer != TUSB_XFER_ISOCHRONOUS) ? USB_ENDPT_EPHSHK_MASK: 0;
+  val |= dir ? USB_ENDPT_EPTXEN_MASK : USB_ENDPT_EPRXEN_MASK;
+  KHCI->ENDPOINT[epn].ENDPT |= val;
+
+  if (xfer != TUSB_XFER_ISOCHRONOUS) {
+    bd[odd].dts      = 1;
+    bd[odd].data     = 0;
+    bd[odd ^ 1].dts  = 1;
+    bd[odd ^ 1].data = 1;
+  }
+
+  return true;
+}
+
+void dcd_edpt_close(uint8_t rhport, uint8_t ep_addr)
+{
+  (void) rhport;
+
+  const unsigned epn      = ep_addr & 0xFu;
+  const unsigned dir      = (ep_addr & TUSB_DIR_IN_MASK) ? TUSB_DIR_IN : TUSB_DIR_OUT;
+  endpoint_state_t *ep    = &_dcd.endpoint[epn][dir];
+  buffer_descriptor_t *bd = &_dcd.bdt[epn][dir][0];
+  const unsigned msk      = dir ? USB_ENDPT_EPTXEN_MASK : USB_ENDPT_EPRXEN_MASK;
+  KHCI->ENDPOINT[epn].ENDPT &= ~msk;
+  ep->max_packet_size = 0;
+  ep->length          = 0;
+  ep->remaining       = 0;
+  bd->head            = 0;
+}
+
+bool dcd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t total_bytes)
+{
+  (void) rhport;
+  NVIC_DisableIRQ(USB0_IRQn);
+  const unsigned epn = ep_addr & 0xFu;
+  const unsigned dir = (ep_addr & TUSB_DIR_IN_MASK) ? TUSB_DIR_IN : TUSB_DIR_OUT;
+  endpoint_state_t    *ep = &_dcd.endpoint[epn][dir];
+  buffer_descriptor_t *bd = &_dcd.bdt[epn][dir][ep->odd];
+
+  if (bd->own) {
+    TU_LOG1("DCD XFER fail %x %d %lx %lx\r\n", ep_addr, total_bytes, ep->state, bd->head);
+    return false; /* The last transfer has not completed */
+  }
+  ep->length    = total_bytes;
+  ep->remaining = total_bytes;
+
+  const unsigned mps = ep->max_packet_size;
+  if (total_bytes > mps) {
+    buffer_descriptor_t *next = ep->odd ? bd - 1: bd + 1;
+    /* When total_bytes is greater than the max packet size,
+     * it prepares to the next transfer to avoid NAK in advance. */
+    next->bc   = total_bytes >= 2 * mps ? mps: total_bytes - mps;
+    next->addr = buffer + mps;
+    next->own  = 1;
+  }
+  bd->bc        = total_bytes >= mps ? mps: total_bytes;
+  bd->addr      = buffer;
+  __DSB();
+  bd->own  = 1; /* the own bit must set after addr */
+  NVIC_EnableIRQ(USB0_IRQn);
+  return true;
+}
+
+void dcd_edpt_stall(uint8_t rhport, uint8_t ep_addr)
+{
+  (void) rhport;
+  const unsigned epn = ep_addr & 0xFu;
+  if (0 == epn) {
+    KHCI->ENDPOINT[epn].ENDPT |=  USB_ENDPT_EPSTALL_MASK;
+  } else {
+    const unsigned dir      = (ep_addr & TUSB_DIR_IN_MASK) ? TUSB_DIR_IN : TUSB_DIR_OUT;
+    buffer_descriptor_t *bd = _dcd.bdt[epn][dir];
+    bd[0].bdt_stall = 1;
+    bd[1].bdt_stall = 1;
+  }
+}
+
+void dcd_edpt_clear_stall(uint8_t rhport, uint8_t ep_addr)
+{
+  (void) rhport;
+  const unsigned epn      = ep_addr & 0xFu;
+  const unsigned dir      = (ep_addr & TUSB_DIR_IN_MASK) ? TUSB_DIR_IN : TUSB_DIR_OUT;
+  const unsigned odd      = _dcd.endpoint[epn][dir].odd;
+  buffer_descriptor_t *bd = _dcd.bdt[epn][dir];
+
+  bd[odd ^ 1].own       = 0;
+  bd[odd ^ 1].data      = 1;
+  bd[odd ^ 1].bdt_stall = 0;
+  bd[odd].own           = 0;
+  bd[odd].data          = 0;
+  bd[odd].bdt_stall     = 0;
+}
+
+//--------------------------------------------------------------------+
+// ISR
+//--------------------------------------------------------------------+
+void dcd_int_handler(uint8_t rhport)
+{
+  (void) rhport;
+
+  uint32_t is  = KHCI->ISTAT;
+  uint32_t msk = KHCI->INTEN;
+  KHCI->ISTAT = is & ~msk;
+  is &= msk;
+  if (is & USB_ISTAT_ERROR_MASK) {
+    /* TODO: */
+    uint32_t es = KHCI->ERRSTAT;
+    KHCI->ERRSTAT = es;
+    KHCI->ISTAT   = is; /* discard any pending events */
+    return;
+  }
+
+  if (is & USB_ISTAT_USBRST_MASK) {
+    KHCI->ISTAT = is; /* discard any pending events */
+    process_bus_reset(rhport);
+    return;
+  }
+  if (is & USB_ISTAT_SLEEP_MASK) {
+    KHCI->ISTAT = USB_ISTAT_SLEEP_MASK;
+    process_bus_inactive(rhport);
+    return;
+  }
+  if (is & USB_ISTAT_RESUME_MASK) {
+    KHCI->ISTAT = USB_ISTAT_RESUME_MASK;
+    process_bus_active(rhport);
+    return;
+  }
+  if (is & USB_ISTAT_SOFTOK_MASK) {
+    KHCI->ISTAT = USB_ISTAT_SOFTOK_MASK;
+    dcd_event_bus_signal(rhport, DCD_EVENT_SOF, true);
+    return;
+  }
+  if (is & USB_ISTAT_STALL_MASK) {
+    KHCI->ISTAT = USB_ISTAT_STALL_MASK;
+    process_stall(rhport);
+    return;
+  }
+  if (is & USB_ISTAT_TOKDNE_MASK) {
+    process_tokdne(rhport);
+    return;
+  }
+}
+
+#endif

src/tusb_option.h

@@ -97,6 +97,10 @@
 // Dialog
 #define OPT_MCU_DA1469X          1000 ///< Dialog Semiconductor DA1469x
 
+// NXP Kinetis
+#define OPT_MCU_MKL25ZXX         1100 ///< NXP MKL25Zxx
+
+
 /** @} */
 
 /** \defgroup group_supported_os Supported RTOS