Add Raspberry Pi Zero W and Zero 2 W

These are different Broadcom chips. The peripherals are essentially
the same. The main differences are:
* The CPU(s)
* The interrupt controller
* The peripheral base address (but not the peripherals that we use)

hw/bsp/bcm2835/boards/raspberrypi_cm4/board.mk

@@ -0,0 +1,9 @@
+CFLAGS += -mcpu=cortex-a72 \
+          -DBCM_VERSION=2711 \
+          -DCFG_TUSB_MCU=OPT_MCU_BCM2711
+
+CROSS_COMPILE = aarch64-none-elf-
+
+SUFFIX = 8
+
+INC += $(TOP)/lib/CMSIS_5/CMSIS/Core_A/Include

hw/bsp/bcm2835/boards/raspberrypi_zero2w/board.h

@@ -0,0 +1,38 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, 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.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */

hw/bsp/bcm2835/boards/raspberrypi_zero2w/board.mk

@@ -0,0 +1,9 @@
+CFLAGS += -mcpu=cortex-a53 \
+          -DBCM_VERSION=2837 \
+          -DCFG_TUSB_MCU=OPT_MCU_BCM2837
+
+CROSS_COMPILE = aarch64-none-elf-
+
+SUFFIX = 8
+
+INC += $(TOP)/lib/CMSIS_5/CMSIS/Core_A/Include

hw/bsp/bcm2835/boards/raspberrypi_zero_w/board.h

@@ -0,0 +1,38 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, 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.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */

hw/bsp/bcm2835/boards/raspberrypi_zero_w/board.mk

@@ -0,0 +1,7 @@
+CFLAGS += -mcpu=arm1176jzf-s \
+          -DBCM_VERSION=2835 \
+          -DCFG_TUSB_MCU=OPT_MCU_BCM2835
+
+CROSS_COMPILE = arm-none-eabi-
+
+SUFFIX = 

hw/bsp/raspberrypi4/family.c → hw/bsp/bcm2835/family.c

@@ -27,8 +27,9 @@
 #include "bsp/board.h"
 #include "board.h"
 
+#include "broadcom/cpu.h"
+#include "broadcom/gpio.h"
 #include "broadcom/interrupts.h"
-#include "broadcom/io.h"
 #include "broadcom/mmu.h"
 #include "broadcom/caches.h"
 #include "broadcom/vcmailbox.h"
@@ -37,9 +38,8 @@
 #define LED_PIN               18
 #define LED_STATE_ON          1
 
-// Button
-#define BUTTON_PIN            16
-#define BUTTON_STATE_ACTIVE   0
+// UART TX
+#define UART_TX_PIN           14
 
 //--------------------------------------------------------------------+
 // Forward USB interrupt events to TinyUSB IRQ Handler
@@ -62,14 +62,26 @@ void board_init(void)
   init_caches();
 
   // LED
-  gpio_initOutputPinWithPullNone(LED_PIN);
+  gpio_set_function(LED_PIN, GPIO_FUNCTION_OUTPUT);
+  gpio_set_pull(LED_PIN, BP_PULL_NONE);
   board_led_write(true);
 
-  // Button
-  // TODO
-
   // Uart
-  uart_init();
+  COMPLETE_MEMORY_READS;
+  AUX->ENABLES_b.UART_1 = true;
+
+  UART1->IER = 0;
+  UART1->CNTL = 0;
+  UART1->LCR_b.DATA_SIZE = UART1_LCR_DATA_SIZE_MODE_8BIT;
+  UART1->MCR = 0;
+  UART1->IER = 0;
+
+  uint32_t source_clock = vcmailbox_get_clock_rate_measured(VCMAILBOX_CLOCK_CORE);
+  UART1->BAUD = ((source_clock / (115200 * 8)) - 1);
+  UART1->CNTL |= UART1_CNTL_TX_ENABLE_Msk;
+  COMPLETE_MEMORY_READS;
+
+  gpio_set_function(UART_TX_PIN, GPIO_FUNCTION_ALT5);
 
   // Turn on USB peripheral.
   vcmailbox_set_power_state(VCMAILBOX_DEVICE_USB_HCD, true);
@@ -87,7 +99,7 @@ void board_init(void)
 
 void board_led_write(bool state)
 {
-  gpio_setPinOutputBool(LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
+  gpio_set_value(LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
 }
 
 uint32_t board_button_read(void)

hw/bsp/raspberrypi4/family.mk → hw/bsp/bcm2835/family.mk

@@ -3,18 +3,14 @@ DEPS_SUBMODULES += $(MCU_DIR)
 
 include $(TOP)/$(BOARD_PATH)/board.mk
 
-CC = clang
-
 CFLAGS += \
-	-mcpu=cortex-a72 \
 	-Wall \
 	-O0 \
 	-ffreestanding \
 	-nostdlib \
 	-nostartfiles \
-	-std=c17 \
 	-mgeneral-regs-only \
-	-DCFG_TUSB_MCU=OPT_MCU_BCM2711
+	-std=c17
 
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=cast-qual
@@ -22,30 +18,26 @@ CFLAGS += -Wno-error=cast-qual
 SRC_C += \
 	src/portable/synopsys/dwc2/dcd_dwc2.c \
 	$(MCU_DIR)/broadcom/gen/interrupt_handlers.c \
+	$(MCU_DIR)/broadcom/gpio.c \
 	$(MCU_DIR)/broadcom/interrupts.c \
-	$(MCU_DIR)/broadcom/io.c \
 	$(MCU_DIR)/broadcom/mmu.c \
 	$(MCU_DIR)/broadcom/caches.c \
 	$(MCU_DIR)/broadcom/vcmailbox.c
 
-
-CROSS_COMPILE = aarch64-none-elf-
-
 SKIP_NANOLIB = 1
 
-LD_FILE = $(MCU_DIR)/broadcom/link.ld
+LD_FILE = $(MCU_DIR)/broadcom/link$(SUFFIX).ld
 
 INC += \
 	$(TOP)/$(BOARD_PATH) \
-	$(TOP)/$(MCU_DIR) \
-	$(TOP)/lib/CMSIS_5/CMSIS/Core_A/Include
+	$(TOP)/$(MCU_DIR)
 
-SRC_S += $(MCU_DIR)/broadcom/boot.S
+SRC_S += $(MCU_DIR)/broadcom/boot$(SUFFIX).S
 
-$(BUILD)/kernel8.img: $(BUILD)/$(PROJECT).elf
+$(BUILD)/kernel$(SUFFIX).img: $(BUILD)/$(PROJECT).elf
 	$(OBJCOPY) -O binary $^ $@
 
 # Copy to kernel to netboot drive or SD card
 # Change destinaation to fit your need
-flash: $(BUILD)/kernel8.img
-	$(CP) $< /home/$(USER)/Documents/code/pi4_tinyusb/boot_cpy
+flash: $(BUILD)/kernel$(SUFFIX).img
+	@$(CP) $< /home/$(USER)/Documents/code/pi_tinyusb/boot_cpy

hw/bsp/raspberrypi4/boards/raspberrypi_cm4/board.mk

@@ -1 +0,0 @@
-CFLAGS += -DBCM_VERSION=2711

hw/mcu/broadcom

@@ -1 +1 @@
-Subproject commit 5bff1d5e02c37c38ee1e5cf3f7fe82fdc7e1517e
+Subproject commit 08370086080759ed54ac1136d62d2ad24c6fa267

src/device/dcd_attr.h

@@ -190,7 +190,7 @@
   #define DCD_ATTR_ENDPOINT_MAX   4
 
 //------------- Broadcom -------------//
-#elif TU_CHECK_MCU(OPT_MCU_BCM2711)
+#elif TU_CHECK_MCU(OPT_MCU_BCM2711, OPT_MCU_BCM2835, OPT_MCU_BCM2837)
   #define DCD_ATTR_ENDPOINT_MAX   8
 
 //------------- Broadcom -------------//

src/portable/synopsys/dwc2/dcd_dwc2.c

@@ -33,7 +33,8 @@
 #if TUSB_OPT_DEVICE_ENABLED && \
     ( defined(DCD_ATTR_DWC2_STM32) || \
       TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3, OPT_MCU_GD32VF103) || \
-      TU_CHECK_MCU(OPT_MCU_EFM32GG, OPT_MCU_BCM2711, OPT_MCU_XMC4000) )
+      TU_CHECK_MCU(OPT_MCU_EFM32GG, OPT_MCU_BCM2711, OPT_MCU_BCM2835) || \
+      TU_CHECK_MCU(OPT_MCU_BCM2837, OPT_MCU_XMC4000) )
 
 #include "device/dcd.h"
 #include "dwc2_type.h"
@@ -44,7 +45,7 @@
   #include "dwc2_esp32.h"
 #elif TU_CHECK_MCU(OPT_MCU_GD32VF103)
   #include "dwc2_gd32.h"
-#elif TU_CHECK_MCU(OPT_MCU_BCM2711)
+#elif TU_CHECK_MCU(OPT_MCU_BCM2711, OPT_MCU_BCM2835, OPT_MCU_BCM2837)
   #include "dwc2_bcm.h"
 #elif TU_CHECK_MCU(OPT_MCU_EFM32GG)
   #include "dwc2_efm32.h"

src/portable/synopsys/dwc2/dwc2_bcm.h

@@ -31,6 +31,7 @@
  extern "C" {
 #endif
 
+#include "broadcom/defines.h"
 #include "broadcom/interrupts.h"
 #include "broadcom/caches.h"
 
@@ -47,7 +48,6 @@ static inline void dwc2_dcd_int_enable(uint8_t rhport)
 {
   (void) rhport;
   BP_EnableIRQ(USB_IRQn);
-  __asm__ volatile("isb"); // needed if TIMER1 IRQ is not enabled !?
 }
 
 TU_ATTR_ALWAYS_INLINE
@@ -55,7 +55,6 @@ static inline void dwc2_dcd_int_disable (uint8_t rhport)
 {
   (void) rhport;
   BP_DisableIRQ(USB_IRQn);
-  __asm__ volatile("isb"); // needed if TIMER1 IRQ is not enabled !?
 }
 
 static inline void dwc2_remote_wakeup_delay(void)

src/tusb_option.h

@@ -132,6 +132,8 @@
 
 // Broadcom
 #define OPT_MCU_BCM2711          1700 ///< Broadcom BCM2711
+#define OPT_MCU_BCM2835          1701 ///< Broadcom BCM2835
+#define OPT_MCU_BCM2837          1702 ///< Broadcom BCM2837
 
 // Infineon
 #define OPT_MCU_XMC4000          1800 ///< Infineon XMC4000