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authorGareth McMullin2014-12-23 21:31:43 +1300
committerGareth McMullin2014-12-23 21:31:43 +1300
commitfdd77993041b20e85c1c98578ae2923bfba40449 (patch)
tree175ec09b517a18e392d3a4321ad441f072a01bed
parent9c78e26c1d97cd5f0c413c2804db0bf70cc348b5 (diff)
parent346258934b99c0ea50acfb5ea05fdf0537b3194a (diff)
Merge pull request #60 from themadinventor/lp-icdi-clean
Added (preliminary) support for TI TM4C123 Launchpad
-rw-r--r--src/lmi.c20
-rw-r--r--src/platforms/launchpad-icdi/Makefile.inc23
-rw-r--r--src/platforms/launchpad-icdi/platform.c86
-rw-r--r--src/platforms/launchpad-icdi/platform.h137
-rw-r--r--src/platforms/tm4c/cdcacm.c577
-rw-r--r--src/platforms/tm4c/gdb_if.c100
-rw-r--r--src/platforms/tm4c/jtagtap.c58
-rw-r--r--src/platforms/tm4c/swdptap.c125
-rw-r--r--src/platforms/tm4c/tm4c.ld29
-rw-r--r--src/platforms/tm4c/traceswo.c165
-rw-r--r--src/platforms/tm4c/usbuart.c182
11 files changed, 1501 insertions, 1 deletions
diff --git a/src/lmi.c b/src/lmi.c
index cb620c0..a08819e 100644
--- a/src/lmi.c
+++ b/src/lmi.c
@@ -38,7 +38,7 @@ static int lmi_flash_erase(struct target_s *target, uint32_t addr, int len);
static int lmi_flash_write(struct target_s *target, uint32_t dest,
const uint8_t *src, int len);
-static const char lmi_driver_str[] = "LuminaryMicro Stellaris";
+static const char lmi_driver_str[] = "TI Stellaris/Tiva";
static const char lmi_xml_memory_map[] = "<?xml version=\"1.0\"?>"
/* "<!DOCTYPE memory-map "
@@ -51,6 +51,17 @@ static const char lmi_xml_memory_map[] = "<?xml version=\"1.0\"?>"
" <memory type=\"ram\" start=\"0x20000000\" length=\"0x10000\"/>"
"</memory-map>";
+static const char tm4c123gh6pm_xml_memory_map[] = "<?xml version=\"1.0\"?>"
+/* "<!DOCTYPE memory-map "
+ " PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
+ " \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"*/
+ "<memory-map>"
+ " <memory type=\"flash\" start=\"0\" length=\"0x40000\">"
+ " <property name=\"blocksize\">0x400</property>"
+ " </memory>"
+ " <memory type=\"ram\" start=\"0x20000000\" length=\"0x8000\"/>"
+ "</memory-map>";
+
uint16_t lmi_flash_write_stub[] = {
// _start:
@@ -100,6 +111,13 @@ bool lmi_probe(struct target_s *target)
target->flash_erase = lmi_flash_erase;
target->flash_write = lmi_flash_write;
return true;
+
+ case 0x10A1: /* TM4C123GH6PM */
+ target->driver = lmi_driver_str;
+ target->xml_mem_map = tm4c123gh6pm_xml_memory_map;
+ target->flash_erase = lmi_flash_erase;
+ target->flash_write = lmi_flash_write;
+ return true;
}
return false;
}
diff --git a/src/platforms/launchpad-icdi/Makefile.inc b/src/platforms/launchpad-icdi/Makefile.inc
new file mode 100644
index 0000000..8a0f9a3
--- /dev/null
+++ b/src/platforms/launchpad-icdi/Makefile.inc
@@ -0,0 +1,23 @@
+CROSS_COMPILE ?= arm-none-eabi-
+CC = $(CROSS_COMPILE)gcc
+OBJCOPY = $(CROSS_COMPILE)objcopy
+
+INCLUDES = -I../libopencm3/include
+
+CPU_FLAGS = -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard
+CFLAGS += $(INCLUDES) $(CPU_FLAGS) -DTARGET_IS_BLIZZARD_RB1 -DLM4F -DPART_TM4C123GH6PM
+
+LINKER_SCRIPT="platforms/tm4c/tm4c.ld"
+LDFLAGS = -nostartfiles -lc $(CPU_FLAGS) -nodefaultlibs -T$(LINKER_SCRIPT) -Wl,--gc-sections \
+ -L../libopencm3/lib -lopencm3_lm4f -lnosys -lm -lgcc
+
+VPATH += platforms/tm4c
+
+SRC += cdcacm.c \
+ usbuart.c \
+ traceswo.o
+
+all: blackmagic.bin
+
+blackmagic.bin: blackmagic
+ $(OBJCOPY) -O binary $^ $@
diff --git a/src/platforms/launchpad-icdi/platform.c b/src/platforms/launchpad-icdi/platform.c
new file mode 100644
index 0000000..848271e
--- /dev/null
+++ b/src/platforms/launchpad-icdi/platform.c
@@ -0,0 +1,86 @@
+#include "platform.h"
+#include "gdb_if.h"
+#include "usbuart.h"
+
+#include <libopencm3/lm4f/rcc.h>
+#include <libopencm3/lm4f/nvic.h>
+#include <libopencm3/lm4f/uart.h>
+#include <libopencm3/cm3/systick.h>
+
+#define SYSTICKHZ 100
+#define SYSTICKMS (1000 / SYSTICKHZ)
+
+#define PLL_DIV_80MHZ 5
+#define PLL_DIV_25MHZ 16
+
+extern void trace_tick(void);
+
+jmp_buf fatal_error_jmpbuf;
+uint8_t running_status;
+volatile uint32_t timeout_counter;
+
+const char *morse_msg;
+
+void morse(const char *msg, char repeat)
+{
+ (void) msg;
+ (void) repeat;
+}
+
+void sys_tick_handler(void)
+{
+ if(timeout_counter)
+ timeout_counter--;
+ trace_tick();
+}
+
+int
+platform_init(void)
+{
+ int i;
+ for(i=0; i<1000000; i++);
+
+ rcc_sysclk_config(OSCSRC_MOSC, XTAL_16M, PLL_DIV_80MHZ);
+
+ // Enable all JTAG ports and set pins to output
+ periph_clock_enable(RCC_GPIOA);
+ periph_clock_enable(RCC_GPIOB);
+
+ gpio_enable_ahb_aperture();
+
+ gpio_mode_setup(TMS_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TMS_PIN);
+ gpio_mode_setup(TCK_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TCK_PIN);
+ gpio_mode_setup(TDI_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TDI_PIN);
+ gpio_mode_setup(TDO_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, TDO_PIN);
+ gpio_mode_setup(SRST_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, SRST_PIN);
+ gpio_set_output_config(SRST_PORT, GPIO_OTYPE_OD, GPIO_DRIVE_2MA, SRST_PIN);
+ gpio_set(SRST_PORT, SRST_PIN);
+
+ systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
+ systick_set_reload(rcc_get_system_clock_frequency() / (SYSTICKHZ * 8));
+
+ systick_interrupt_enable();
+ systick_counter_enable();
+
+ nvic_enable_irq(NVIC_SYSTICK_IRQ);
+ nvic_enable_irq(NVIC_UART0_IRQ);
+
+ usbuart_init();
+ cdcacm_init();
+
+ //jtag_scan(NULL);
+
+ return 0;
+}
+
+void platform_delay(uint32_t delay)
+{
+ timeout_counter = delay * 10;
+ while(timeout_counter);
+}
+
+const char *platform_target_voltage(void)
+{
+ return "not supported";
+}
+
diff --git a/src/platforms/launchpad-icdi/platform.h b/src/platforms/launchpad-icdi/platform.h
new file mode 100644
index 0000000..7f5d55f
--- /dev/null
+++ b/src/platforms/launchpad-icdi/platform.h
@@ -0,0 +1,137 @@
+#ifndef __PLATFORM_H
+#define __PLATFORM_H
+
+#include <stdint.h>
+
+#include <setjmp.h>
+#include <alloca.h>
+
+#include <libopencm3/lm4f/gpio.h>
+#include <libopencm3/usb/usbd.h>
+
+#include "gdb_packet.h"
+
+#define CDCACM_PACKET_SIZE 64
+#define BOARD_IDENT "Black Magic Probe (Launchpad ICDI), (Firmware 1.5" VERSION_SUFFIX ", build " BUILDDATE ")"
+#define BOARD_IDENT_DFU "Black Magic (Upgrade) for Launchpad, (Firmware 1.5" VERSION_SUFFIX ", build " BUILDDATE ")"
+#define DFU_IDENT "Black Magic Firmware Upgrade (Launchpad)"
+#define DFU_IFACE_STRING "lolwut"
+
+extern usbd_device *usbdev;
+#define CDCACM_GDB_ENDPOINT 1
+#define CDCACM_UART_ENDPOINT 3
+
+extern jmp_buf fatal_error_jmpbuf;
+extern uint8_t running_status;
+extern const char *morse_msg;
+extern volatile uint32_t timeout_counter;
+
+#define TMS_PORT GPIOA_BASE
+#define TMS_PIN GPIO3
+
+#define TCK_PORT GPIOA_BASE
+#define TCK_PIN GPIO2
+
+#define TDI_PORT GPIOA_BASE
+#define TDI_PIN GPIO5
+
+#define TDO_PORT GPIOA_BASE
+#define TDO_PIN GPIO4
+
+#define SWO_PORT GPIOD_BASE
+#define SWO_PIN GPIO6
+
+#define SWDIO_PORT TMS_PORT
+#define SWDIO_PIN TMS_PIN
+
+#define SWCLK_PORT TCK_PORT
+#define SWCLK_PIN TCK_PIN
+
+#define SRST_PORT GPIOA_BASE
+#define SRST_PIN GPIO6
+
+#define TMS_SET_MODE() { \
+ gpio_mode_setup(TMS_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TMS_PIN); \
+ gpio_set_output_config(TMS_PORT, GPIO_OTYPE_PP, GPIO_DRIVE_2MA, TMS_PIN); \
+}
+
+#define SWDIO_MODE_FLOAT() { \
+ gpio_mode_setup(SWDIO_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, SWDIO_PIN); \
+}
+
+#define SWDIO_MODE_DRIVE() { \
+ gpio_mode_setup(SWDIO_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, SWDIO_PIN); \
+ gpio_set_output_config(SWDIO_PORT, GPIO_OTYPE_PP, GPIO_DRIVE_2MA, SWDIO_PIN); \
+}
+
+extern usbd_driver lm4f_usb_driver;
+#define USB_DRIVER lm4f_usb_driver
+#define USB_IRQ NVIC_USB0_IRQ
+#define USB_ISR usb0_isr
+
+#define IRQ_PRI_USB (2 << 4)
+
+#define USBUART UART0
+#define USBUART_CLK RCC_UART0
+#define USBUART_IRQ NVIC_UART0_IRQ
+#define USBUART_ISR uart0_isr
+#define UART_PIN_SETUP() do { \
+ periph_clock_enable(RCC_GPIOA); \
+ __asm__("nop"); __asm__("nop"); __asm__("nop"); \
+ gpio_set_af(GPIOA_BASE, 0x1, GPIO0 | GPIO1); \
+ gpio_mode_setup(GPIOA_BASE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO0); \
+ gpio_mode_setup(GPIOA_BASE, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO1); \
+ } while (0)
+
+#define TRACEUART UART2
+#define TRACEUART_CLK RCC_UART2
+#define TRACEUART_IRQ NVIC_UART2_IRQ
+#define TRACEUART_ISR uart2_isr
+
+/* Use newlib provided integer only stdio functions */
+#define sscanf siscanf
+#define sprintf siprintf
+#define vasprintf vasiprintf
+
+#define DEBUG(...)
+
+#define SET_RUN_STATE(state) {running_status = (state);}
+#define SET_IDLE_STATE(state) {}
+#define SET_ERROR_STATE(state) SET_IDLE_STATE(state)
+
+#define PLATFORM_SET_FATAL_ERROR_RECOVERY() {setjmp(fatal_error_jmpbuf);}
+#define PLATFORM_FATAL_ERROR(error) { \
+ if( running_status ) gdb_putpacketz("X1D"); \
+ else gdb_putpacketz("EFF"); \
+ running_status = 0; \
+ target_list_free(); \
+ morse("TARGET LOST.", 1); \
+ longjmp(fatal_error_jmpbuf, (error)); \
+}
+
+#define PLATFORM_HAS_TRACESWO
+
+int platform_init(void);
+void morse(const char *msg, char repeat);
+
+inline static void gpio_set_val(uint32_t port, uint8_t pin, uint8_t val) {
+ gpio_write(port, pin, val == 0 ? 0 : 0xff);
+}
+
+inline static uint8_t gpio_get(uint32_t port, uint8_t pin) {
+ return !(gpio_read(port, pin) == 0);
+}
+
+void platform_delay(uint32_t delay);
+const char *platform_target_voltage(void);
+
+/* <cdcacm.c> */
+void cdcacm_init(void);
+/* Returns current usb configuration, or 0 if not configured. */
+int cdcacm_get_config(void);
+int cdcacm_get_dtr(void);
+
+#define disconnect_usb() do { usbd_disconnect(usbdev,1); nvic_disable_irq(USB_IRQ);} while(0)
+#define setup_vbus_irq()
+
+#endif
diff --git a/src/platforms/tm4c/cdcacm.c b/src/platforms/tm4c/cdcacm.c
new file mode 100644
index 0000000..041d85b
--- /dev/null
+++ b/src/platforms/tm4c/cdcacm.c
@@ -0,0 +1,577 @@
+/*
+ * This file is part of the Black Magic Debug project.
+ *
+ * Copyright (C) 2011 Black Sphere Technologies Ltd.
+ * Written by Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* This file implements a the USB Communications Device Class - Abstract
+ * Control Model (CDC-ACM) as defined in CDC PSTN subclass 1.2.
+ * A Device Firmware Upgrade (DFU 1.1) class interface is provided for
+ * field firmware upgrade.
+ *
+ * The device's unique id is used as the USB serial number string.
+ */
+
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/cdc.h>
+#include <libopencm3/cm3/scb.h>
+#include <libopencm3/usb/dfu.h>
+#include <libopencm3/lm4f/rcc.h>
+#include <libopencm3/lm4f/usb.h>
+#include <stdlib.h>
+
+#include "platform.h"
+#include "gdb_if.h"
+#if defined(PLATFORM_HAS_TRACESWO)
+#include <traceswo.h>
+#endif
+#include <usbuart.h>
+
+#define DFU_IF_NO 4
+
+usbd_device * usbdev;
+
+static char *get_dev_unique_id(char *serial_no);
+
+static int configured;
+static int cdcacm_gdb_dtr = 1;
+
+
+static const struct usb_device_descriptor dev = {
+ .bLength = USB_DT_DEVICE_SIZE,
+ .bDescriptorType = USB_DT_DEVICE,
+ .bcdUSB = 0x0200,
+ .bDeviceClass = 0xEF, /* Miscellaneous Device */
+ .bDeviceSubClass = 2, /* Common Class */
+ .bDeviceProtocol = 1, /* Interface Association */
+ .bMaxPacketSize0 = 64,
+ .idVendor = 0x1D50,
+ .idProduct = 0x6018,
+ .bcdDevice = 0x0100,
+ .iManufacturer = 1,
+ .iProduct = 2,
+ .iSerialNumber = 3,
+ .bNumConfigurations = 1,
+};
+
+/* This notification endpoint isn't implemented. According to CDC spec its
+ * optional, but its absence causes a NULL pointer dereference in Linux cdc_acm
+ * driver. */
+static const struct usb_endpoint_descriptor gdb_comm_endp[] = {{
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x82,
+ .bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
+ .wMaxPacketSize = 16,
+ .bInterval = 255,
+}};
+
+static const struct usb_endpoint_descriptor gdb_data_endp[] = {{
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x01,
+ .bmAttributes = USB_ENDPOINT_ATTR_BULK,
+ .wMaxPacketSize = CDCACM_PACKET_SIZE,
+ .bInterval = 1,
+}, {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x81,
+ .bmAttributes = USB_ENDPOINT_ATTR_BULK,
+ .wMaxPacketSize = CDCACM_PACKET_SIZE,
+ .bInterval = 1,
+}};
+
+static const struct {
+ struct usb_cdc_header_descriptor header;
+ struct usb_cdc_call_management_descriptor call_mgmt;
+ struct usb_cdc_acm_descriptor acm;
+ struct usb_cdc_union_descriptor cdc_union;
+} __attribute__((packed)) gdb_cdcacm_functional_descriptors = {
+ .header = {
+ .bFunctionLength = sizeof(struct usb_cdc_header_descriptor),
+ .bDescriptorType = CS_INTERFACE,
+ .bDescriptorSubtype = USB_CDC_TYPE_HEADER,
+ .bcdCDC = 0x0110,
+ },
+ .call_mgmt = {
+ .bFunctionLength =
+ sizeof(struct usb_cdc_call_management_descriptor),
+ .bDescriptorType = CS_INTERFACE,
+ .bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT,
+ .bmCapabilities = 0,
+ .bDataInterface = 1,
+ },
+ .acm = {
+ .bFunctionLength = sizeof(struct usb_cdc_acm_descriptor),
+ .bDescriptorType = CS_INTERFACE,
+ .bDescriptorSubtype = USB_CDC_TYPE_ACM,
+ .bmCapabilities = 2, /* SET_LINE_CODING supported */
+ },
+ .cdc_union = {
+ .bFunctionLength = sizeof(struct usb_cdc_union_descriptor),
+ .bDescriptorType = CS_INTERFACE,
+ .bDescriptorSubtype = USB_CDC_TYPE_UNION,
+ .bControlInterface = 0,
+ .bSubordinateInterface0 = 1,
+ }
+};
+
+static const struct usb_interface_descriptor gdb_comm_iface[] = {{
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 0,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_CDC,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
+ .bInterfaceProtocol = USB_CDC_PROTOCOL_AT,
+ .iInterface = 4,
+
+ .endpoint = gdb_comm_endp,
+
+ .extra = &gdb_cdcacm_functional_descriptors,
+ .extralen = sizeof(gdb_cdcacm_functional_descriptors)
+}};
+
+static const struct usb_interface_descriptor gdb_data_iface[] = {{
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 1,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ .iInterface = 0,
+
+ .endpoint = gdb_data_endp,
+}};
+
+static const struct usb_iface_assoc_descriptor gdb_assoc = {
+ .bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+ .bFirstInterface = 0,
+ .bInterfaceCount = 2,
+ .bFunctionClass = USB_CLASS_CDC,
+ .bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
+ .bFunctionProtocol = USB_CDC_PROTOCOL_AT,
+ .iFunction = 0,
+};
+
+/* Serial ACM interface */
+static const struct usb_endpoint_descriptor uart_comm_endp[] = {{
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x84,
+ .bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
+ .wMaxPacketSize = 16,
+ .bInterval = 255,
+}};
+
+static const struct usb_endpoint_descriptor uart_data_endp[] = {{
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x03,
+ .bmAttributes = USB_ENDPOINT_ATTR_BULK,
+ .wMaxPacketSize = CDCACM_PACKET_SIZE,
+ .bInterval = 1,
+}, {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x83,
+ .bmAttributes = USB_ENDPOINT_ATTR_BULK,
+ .wMaxPacketSize = CDCACM_PACKET_SIZE,
+ .bInterval = 1,
+}};
+
+static const struct {
+ struct usb_cdc_header_descriptor header;
+ struct usb_cdc_call_management_descriptor call_mgmt;
+ struct usb_cdc_acm_descriptor acm;
+ struct usb_cdc_union_descriptor cdc_union;
+} __attribute__((packed)) uart_cdcacm_functional_descriptors = {
+ .header = {
+ .bFunctionLength = sizeof(struct usb_cdc_header_descriptor),
+ .bDescriptorType = CS_INTERFACE,
+ .bDescriptorSubtype = USB_CDC_TYPE_HEADER,
+ .bcdCDC = 0x0110,
+ },
+ .call_mgmt = {
+ .bFunctionLength =
+ sizeof(struct usb_cdc_call_management_descriptor),
+ .bDescriptorType = CS_INTERFACE,
+ .bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT,
+ .bmCapabilities = 0,
+ .bDataInterface = 3,
+ },
+ .acm = {
+ .bFunctionLength = sizeof(struct usb_cdc_acm_descriptor),
+ .bDescriptorType = CS_INTERFACE,
+ .bDescriptorSubtype = USB_CDC_TYPE_ACM,
+ .bmCapabilities = 2, /* SET_LINE_CODING supported*/
+ },
+ .cdc_union = {
+ .bFunctionLength = sizeof(struct usb_cdc_union_descriptor),
+ .bDescriptorType = CS_INTERFACE,
+ .bDescriptorSubtype = USB_CDC_TYPE_UNION,
+ .bControlInterface = 2,
+ .bSubordinateInterface0 = 3,
+ }
+};
+
+static const struct usb_interface_descriptor uart_comm_iface[] = {{
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 2,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_CDC,
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
+ .bInterfaceProtocol = USB_CDC_PROTOCOL_AT,
+ .iInterface = 5,
+
+ .endpoint = uart_comm_endp,
+
+ .extra = &uart_cdcacm_functional_descriptors,
+ .extralen = sizeof(uart_cdcacm_functional_descriptors)
+}};
+
+static const struct usb_interface_descriptor uart_data_iface[] = {{
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 3,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_DATA,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ .iInterface = 0,
+
+ .endpoint = uart_data_endp,
+}};
+
+static const struct usb_iface_assoc_descriptor uart_assoc = {
+ .bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+ .bFirstInterface = 2,
+ .bInterfaceCount = 2,
+ .bFunctionClass = USB_CLASS_CDC,
+ .bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
+ .bFunctionProtocol = USB_CDC_PROTOCOL_AT,
+ .iFunction = 0,
+};
+
+const struct usb_dfu_descriptor dfu_function = {
+ .bLength = sizeof(struct usb_dfu_descriptor),
+ .bDescriptorType = DFU_FUNCTIONAL,
+ .bmAttributes = USB_DFU_CAN_DOWNLOAD | USB_DFU_WILL_DETACH,
+ .wDetachTimeout = 255,
+ .wTransferSize = 1024,
+ .bcdDFUVersion = 0x011A,
+};
+
+const struct usb_interface_descriptor dfu_iface = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = DFU_IF_NO,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = 0xFE,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 1,
+ .iInterface = 6,
+
+ .extra = &dfu_function,
+ .extralen = sizeof(dfu_function),
+};
+
+static const struct usb_iface_assoc_descriptor dfu_assoc = {
+ .bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+ .bFirstInterface = 4,
+ .bInterfaceCount = 1,
+ .bFunctionClass = 0xFE,
+ .bFunctionSubClass = 1,
+ .bFunctionProtocol = 1,
+ .iFunction = 6,
+};
+
+#if defined(PLATFORM_HAS_TRACESWO)
+static const struct usb_endpoint_descriptor trace_endp[] = {{
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 0x85,
+ .bmAttributes = USB_ENDPOINT_ATTR_BULK,
+ .wMaxPacketSize = 64,
+ .bInterval = 0,
+}};
+
+const struct usb_interface_descriptor trace_iface = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 5,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = 0xFF,
+ .bInterfaceSubClass = 0xFF,
+ .bInterfaceProtocol = 0xFF,
+ .iInterface = 7,
+
+ .endpoint = trace_endp,
+};
+
+static const struct usb_iface_assoc_descriptor trace_assoc = {
+ .bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+ .bFirstInterface = 5,
+ .bInterfaceCount = 1,
+ .bFunctionClass = 0xFF,
+ .bFunctionSubClass = 0xFF,
+ .bFunctionProtocol = 0xFF,
+ .iFunction = 7,
+};
+#endif
+
+static const struct usb_interface ifaces[] = {{
+ .num_altsetting = 1,
+ .iface_assoc = &gdb_assoc,
+ .altsetting = gdb_comm_iface,
+}, {
+ .num_altsetting = 1,
+ .altsetting = gdb_data_iface,
+}, {
+ .num_altsetting = 1,
+ .iface_assoc = &uart_assoc,
+ .altsetting = uart_comm_iface,
+}, {
+ .num_altsetting = 1,
+ .altsetting = uart_data_iface,
+}, {
+ .num_altsetting = 1,
+ .iface_assoc = &dfu_assoc,
+ .altsetting = &dfu_iface,
+#if defined(PLATFORM_HAS_TRACESWO)
+}, {
+ .num_altsetting = 1,
+ .iface_assoc = &trace_assoc,
+ .altsetting = &trace_iface,
+#endif
+}};
+
+static const struct usb_config_descriptor config = {
+ .bLength = USB_DT_CONFIGURATION_SIZE,
+ .bDescriptorType = USB_DT_CONFIGURATION,
+ .wTotalLength = 0,
+#if defined(PLATFORM_HAS_TRACESWO)
+ .bNumInterfaces = 6,
+#else
+ .bNumInterfaces = 5,
+#endif
+ .bConfigurationValue = 1,
+ .iConfiguration = 0,
+ .bmAttributes = 0x80,
+ .bMaxPower = 0x32,
+
+ .interface = ifaces,
+};
+
+char serial_no[9];
+
+static const char *usb_strings[] = {
+ "Black Sphere Technologies",
+ BOARD_IDENT,
+ serial_no,
+ "Black Magic GDB Server",
+ "Black Magic UART Port",
+ DFU_IDENT,
+#if defined(PLATFORM_HAS_TRACESWO)
+ "Black Magic Trace Capture",
+#endif
+};
+
+static void dfu_detach_complete(usbd_device *dev, struct usb_setup_data *req)
+{
+ (void)dev;
+ (void)req;
+
+ /* Disconnect USB cable */
+ disconnect_usb();
+
+ /* Assert boot-request pin */
+ //assert_boot_pin();
+
+ /* Reset core to enter bootloader */
+ scb_reset_core();
+}
+
+static int cdcacm_control_request(usbd_device *dev,
+ struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
+ void (**complete)(usbd_device *dev, struct usb_setup_data *req))
+{
+ (void)dev;
+ (void)complete;
+ (void)buf;
+ (void)len;
+
+ switch(req->bRequest) {
+ case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
+ /* Ignore if not for GDB interface */
+ if(req->wIndex != 0)
+ return 1;
+
+ cdcacm_gdb_dtr = req->wValue & 1;
+
+ return 1;
+ case USB_CDC_REQ_SET_LINE_CODING:
+ if(*len < sizeof(struct usb_cdc_line_coding))
+ return 0;
+
+ switch(req->wIndex) {
+ case 2:
+ usbuart_set_line_coding((struct usb_cdc_line_coding*)*buf);
+ case 0:
+ return 1; /* Ignore on GDB Port */
+ default:
+ return 0;
+ }
+ case DFU_GETSTATUS:
+ if(req->wIndex == DFU_IF_NO) {
+ (*buf)[0] = DFU_STATUS_OK;
+ (*buf)[1] = 0;
+ (*buf)[2] = 0;
+ (*buf)[3] = 0;
+ (*buf)[4] = STATE_APP_IDLE;
+ (*buf)[5] = 0; /* iString not used here */
+ *len = 6;
+
+ return 1;
+ }
+ case DFU_DETACH:
+ if(req->wIndex == DFU_IF_NO) {
+ *complete = dfu_detach_complete;
+ return 1;
+ }
+ return 0;
+ }
+ return 0;
+}
+
+int cdcacm_get_config(void)
+{
+ return configured;
+}
+
+int cdcacm_get_dtr(void)
+{
+ return cdcacm_gdb_dtr;
+}
+
+static void cdcacm_set_config(usbd_device *dev, uint16_t wValue)
+{
+ configured = wValue;
+
+ /* GDB interface */
+ usbd_ep_setup(dev, 0x01, USB_ENDPOINT_ATTR_BULK,
+ CDCACM_PACKET_SIZE, gdb_usb_out_cb);
+ usbd_ep_setup(dev, 0x81, USB_ENDPOINT_ATTR_BULK,
+ CDCACM_PACKET_SIZE, NULL);
+ usbd_ep_setup(dev, 0x82, USB_ENDPOINT_ATTR_INTERRUPT, 16, NULL);
+
+ /* Serial interface */
+ usbd_ep_setup(dev, 0x03, USB_ENDPOINT_ATTR_BULK,
+ CDCACM_PACKET_SIZE, usbuart_usb_out_cb);
+ usbd_ep_setup(dev, 0x83, USB_ENDPOINT_ATTR_BULK,
+ CDCACM_PACKET_SIZE, usbuart_usb_in_cb);
+ usbd_ep_setup(dev, 0x84, USB_ENDPOINT_ATTR_INTERRUPT, 16, NULL);
+
+#if defined(PLATFORM_HAS_TRACESWO)
+ /* Trace interface */
+ usbd_ep_setup(dev, 0x85, USB_ENDPOINT_ATTR_BULK,
+ 64, trace_buf_drain);
+#endif
+
+ usbd_register_control_callback(dev,
+ USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
+ USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+ cdcacm_control_request);
+
+ /* Notify the host that DCD is asserted.
+ * Allows the use of /dev/tty* devices on *BSD/MacOS
+ */
+ char buf[10];
+ struct usb_cdc_notification *notif = (void*)buf;
+ /* We echo signals back to host as notification */
+ notif->bmRequestType = 0xA1;
+ notif->bNotification = USB_CDC_NOTIFY_SERIAL_STATE;
+ notif->wValue = 0;
+ notif->wIndex = 0;
+ notif->wLength = 2;
+ buf[8] = 3; /* DCD | DSR */
+ buf[9] = 0;
+ usbd_ep_write_packet(dev, 0x82, buf, 10);
+ notif->wIndex = 2;
+ usbd_ep_write_packet(dev, 0x84, buf, 10);
+}
+
+/* We need a special large control buffer for this device: */
+uint8_t usbd_control_buffer[256];
+
+void cdcacm_init(void)
+{
+ get_dev_unique_id(serial_no);
+
+ periph_clock_enable(RCC_GPIOD);
+ __asm__("nop"); __asm__("nop"); __asm__("nop");
+ gpio_mode_setup(GPIOD_BASE, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO4|GPIO5);
+
+ usbdev = usbd_init(&USB_DRIVER, &dev, &config, usb_strings,
+ sizeof(usb_strings)/sizeof(char *),
+ usbd_control_buffer, sizeof(usbd_control_buffer));
+
+ usbd_register_set_config_callback(usbdev, cdcacm_set_config);
+
+ usb_enable_interrupts(USB_INT_RESET|USB_INT_DISCON|USB_INT_RESUME|USB_INT_SUSPEND,
+ 0xff, 0xff);
+ nvic_set_priority(USB_IRQ, IRQ_PRI_USB);
+ nvic_enable_irq(USB_IRQ);
+ setup_vbus_irq();
+}
+
+void USB_ISR(void)
+{
+ usbd_poll(usbdev);
+}
+
+static char *get_dev_unique_id(char *s)
+{
+ /* FIXME: Store a unique serial number somewhere and retreive here */
+ uint32_t unique_id = 1;
+ int i;
+
+ /* Fetch serial number from chip's unique ID */
+ for(i = 0; i < 8; i++) {
+ s[7-i] = ((unique_id >> (4*i)) & 0xF) + '0';
+ }
+ for(i = 0; i < 8; i++)
+ if(s[i] > '9')
+ s[i] += 'A' - '9' - 1;
+ s[8] = 0;
+
+ return s;
+}
diff --git a/src/platforms/tm4c/gdb_if.c b/src/platforms/tm4c/gdb_if.c
new file mode 100644
index 0000000..b14bbd3
--- /dev/null
+++ b/src/platforms/tm4c/gdb_if.c
@@ -0,0 +1,100 @@
+/*
+ * This file is part of the Black Magic Debug project.
+ *
+ * Copyright (C) 2011 Black Sphere Technologies Ltd.
+ * Written by Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* This file implements a transparent channel over which the GDB Remote
+ * Serial Debugging protocol is implemented. This implementation for STM32
+ * uses the USB CDC-ACM device bulk endpoints to implement the channel.
+ */
+#include "platform.h"
+#include <libopencm3/usb/usbd.h>
+
+#include "gdb_if.h"
+
+static volatile uint32_t head_out, tail_out;
+static volatile uint32_t count_in;
+static volatile uint8_t buffer_out[16*CDCACM_PACKET_SIZE];
+static volatile uint8_t buffer_in[CDCACM_PACKET_SIZE];
+
+void gdb_if_putchar(unsigned char c, int flush)
+{
+ buffer_in[count_in++] = c;
+ if(flush || (count_in == CDCACM_PACKET_SIZE)) {
+ /* Refuse to send if USB isn't configured, and
+ * don't bother if nobody's listening */
+ if((cdcacm_get_config() != 1) || !cdcacm_get_dtr()) {
+ count_in = 0;
+ return;
+ }
+ while(usbd_ep_write_packet(usbdev, CDCACM_GDB_ENDPOINT,
+ (uint8_t *)buffer_in, count_in) <= 0);
+ count_in = 0;
+ }
+}
+
+void gdb_usb_out_cb(usbd_device *dev, uint8_t ep)
+{
+ (void)ep;
+ static uint8_t buf[CDCACM_PACKET_SIZE];
+
+ usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 1);
+ uint32_t count = usbd_ep_read_packet(dev, CDCACM_GDB_ENDPOINT,
+ (uint8_t *)buf, CDCACM_PACKET_SIZE);
+
+
+ uint32_t idx;
+ for (idx=0; idx<count; idx++) {
+ buffer_out[head_out++ % sizeof(buffer_out)] = buf[idx];
+ }
+
+ usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 0);
+}
+
+unsigned char gdb_if_getchar(void)
+{
+
+ while(tail_out == head_out) {
+ /* Detach if port closed */
+ if(!cdcacm_get_dtr())
+ return 0x04;
+
+ while(cdcacm_get_config() != 1);
+ }
+
+ return buffer_out[tail_out++ % sizeof(buffer_out)];
+}
+
+unsigned char gdb_if_getchar_to(int timeout)
+{
+ timeout_counter = timeout/100;
+
+ if(head_out == tail_out) do {
+ /* Detach if port closed */
+ if(!cdcacm_get_dtr())
+ return 0x04;
+
+ while(cdcacm_get_config() != 1);
+ } while(timeout_counter && head_out == tail_out);
+
+ if(head_out != tail_out)
+ return gdb_if_getchar();
+
+ return -1;
+}
+
diff --git a/src/platforms/tm4c/jtagtap.c b/src/platforms/tm4c/jtagtap.c
new file mode 100644
index 0000000..f340b1e
--- /dev/null
+++ b/src/platforms/tm4c/jtagtap.c
@@ -0,0 +1,58 @@
+#include "jtagtap.h"
+
+int
+jtagtap_init(void)
+{
+ TMS_SET_MODE();
+
+ for(int i = 0; i <= 50; i++) jtagtap_next(1,0);
+ jtagtap_tms_seq(0xE73C, 16);
+ jtagtap_soft_reset();
+
+ return 0;
+}
+
+void
+jtagtap_reset(void)
+{
+#ifdef TRST_PORT
+ volatile int i;
+ gpio_clear(TRST_PORT, TRST_PIN);
+ for(i = 0; i < 10000; i++) asm("nop");
+ gpio_set(TRST_PORT, TRST_PIN);
+#endif
+ jtagtap_soft_reset();
+}
+
+void
+jtagtap_srst(bool assert)
+{
+ volatile int i;
+ if (assert) {
+ gpio_clear(SRST_PORT, SRST_PIN);
+ for(i = 0; i < 10000; i++) asm("nop");
+ } else {
+ gpio_set(SRST_PORT, SRST_PIN);
+ }
+}
+
+uint8_t
+jtagtap_next(const uint8_t dTMS, const uint8_t dTDO)
+{
+ uint16_t ret;
+
+ gpio_set_val(TMS_PORT, TMS_PIN, dTMS);
+ gpio_set_val(TDI_PORT, TDI_PIN, dTDO);
+ gpio_set(TCK_PORT, TCK_PIN);
+ ret = gpio_get(TDO_PORT, TDO_PIN);
+ gpio_clear(TCK_PORT, TCK_PIN);
+
+ DEBUG("jtagtap_next(TMS = %d, TDO = %d) = %d\n", dTMS, dTDO, ret);
+
+ return ret != 0;
+}
+
+#define PROVIDE_GENERIC_JTAGTAP_TMS_SEQ
+#define PROVIDE_GENERIC_JTAGTAP_TDI_TDO_SEQ
+#define PROVIDE_GENERIC_JTAGTAP_TDI_SEQ
+#include "jtagtap_generic.c"
diff --git a/src/platforms/tm4c/swdptap.c b/src/platforms/tm4c/swdptap.c
new file mode 100644
index 0000000..7004598
--- /dev/null
+++ b/src/platforms/tm4c/swdptap.c
@@ -0,0 +1,125 @@
+#include "general.h"
+#include "platform.h"
+#include "swdptap.h"
+
+static void swdptap_turnaround(uint8_t dir)
+{
+ static uint8_t olddir = 0;
+
+ DEBUG("%s", dir ? "\n-> ":"\n<- ");
+
+ /* Don't turnaround if direction not changing */
+ if(dir == olddir) return;
+ olddir = dir;
+
+ if(dir)
+ SWDIO_MODE_FLOAT();
+ gpio_set(SWCLK_PORT, SWCLK_PIN);
+ gpio_clear(SWCLK_PORT, SWCLK_PIN);
+ if(!dir)
+ SWDIO_MODE_DRIVE();
+}
+
+static uint8_t swdptap_bit_in(void)
+{
+ uint16_t ret;
+
+ ret = gpio_get(SWDIO_PORT, SWDIO_PIN);
+ gpio_set(SWCLK_PORT, SWCLK_PIN);
+ gpio_clear(SWCLK_PORT, SWCLK_PIN);
+
+ DEBUG("%d", ret?1:0);
+
+ return ret != 0;
+}
+
+static void swdptap_bit_out(uint8_t val)
+{
+ DEBUG("%d", val);
+
+ gpio_set_val(SWDIO_PORT, SWDIO_PIN, val);
+ gpio_set(SWCLK_PORT, SWCLK_PIN);
+ gpio_clear(SWCLK_PORT, SWCLK_PIN);
+}
+
+int
+swdptap_init(void)
+{
+ swdptap_reset();
+ swdptap_seq_out(0xE79E, 16); /* 0b0111100111100111 */
+ swdptap_reset();
+ swdptap_seq_out(0, 16);
+
+ return 0;
+}
+
+void
+swdptap_reset(void)
+{
+ swdptap_turnaround(0);
+ /* 50 clocks with TMS high */
+ for(int i = 0; i < 50; i++) swdptap_bit_out(1);
+}
+
+uint32_t
+swdptap_seq_in(int ticks)
+{
+ uint32_t index = 1;
+ uint32_t ret = 0;
+
+ swdptap_turnaround(1);
+
+ while(ticks--) {
+ if(swdptap_bit_in()) ret |= index;
+ index <<= 1;
+ }
+
+ return ret;
+}
+
+uint8_t
+swdptap_seq_in_parity(uint32_t *ret, int ticks)
+{
+ uint32_t index = 1;
+ uint8_t parity = 0;
+ *ret = 0;
+
+ swdptap_turnaround(1);
+
+ while(ticks--) {
+ if(swdptap_bit_in()) {
+ *ret |= index;
+ parity ^= 1;
+ }
+ index <<= 1;
+ }
+ if(swdptap_bit_in()) parity ^= 1;
+
+ return parity;
+}
+
+void
+swdptap_seq_out(uint32_t MS, int ticks)
+{
+ swdptap_turnaround(0);
+
+ while(ticks--) {
+ swdptap_bit_out(MS & 1);
+ MS >>= 1;
+ }
+}
+
+void
+swdptap_seq_out_parity(uint32_t MS, int ticks)
+{
+ uint8_t parity = 0;
+
+ swdptap_turnaround(0);
+
+ while(ticks--) {
+ swdptap_bit_out(MS & 1);
+ parity ^= MS;
+ MS >>= 1;
+ }
+ swdptap_bit_out(parity & 1);
+}
diff --git a/src/platforms/tm4c/tm4c.ld b/src/platforms/tm4c/tm4c.ld
new file mode 100644
index 0000000..8fe93a4
--- /dev/null
+++ b/src/platforms/tm4c/tm4c.ld
@@ -0,0 +1,29 @@
+/*
+ * This file is part of the libopenstm32 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Define memory regions. */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x00000000, LENGTH = 256K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 32K
+}
+
+/* Include the common ld script from libopenstm32. */
+INCLUDE libopencm3_lm4f.ld
+
diff --git a/src/platforms/tm4c/traceswo.c b/src/platforms/tm4c/traceswo.c
new file mode 100644
index 0000000..eb63139
--- /dev/null
+++ b/src/platforms/tm4c/traceswo.c
@@ -0,0 +1,165 @@
+/*
+ * This file is part of the Black Magic Debug project.
+ *
+ * Copyright (C) 2012 Black Sphere Technologies Ltd.
+ * Written by Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * Copyright (C) 2014 Fredrik Ahlberg <fredrik@z80.se>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* This file implements capture of the TRACESWO output.
+ *
+ * ARM DDI 0403D - ARMv7M Architecture Reference Manual
+ * ARM DDI 0337I - Cortex-M3 Technical Reference Manual
+ * ARM DDI 0314H - CoreSight Components Technical Reference Manual
+ */
+
+#include "general.h"
+
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/lm4f/rcc.h>
+#include <libopencm3/lm4f/nvic.h>
+
+#include <libopencm3/lm4f/uart.h>
+
+#include <libopencm3/usb/usbd.h>
+
+#include <string.h>
+#include "platform.h"
+
+void traceswo_init(void)
+{
+ periph_clock_enable(RCC_GPIOD);
+ periph_clock_enable(TRACEUART_CLK);
+ __asm__("nop"); __asm__("nop"); __asm__("nop");
+
+ gpio_mode_setup(SWO_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, SWO_PIN);
+ gpio_set_af(SWO_PORT, 1, SWO_PIN); /* U2RX */
+
+ uart_disable(TRACEUART);
+
+ /* Setup UART parameters. */
+ uart_clock_from_sysclk(TRACEUART);
+ uart_set_baudrate(TRACEUART, 800000);
+ uart_set_databits(TRACEUART, 8);
+ uart_set_stopbits(TRACEUART, 1);
+ uart_set_parity(TRACEUART, UART_PARITY_NONE);
+
+ // Enable FIFO
+ uart_enable_fifo(TRACEUART);
+
+ // Set FIFO interrupt trigger levels to 4/8 full for RX buffer and
+ // 7/8 empty (1/8 full) for TX buffer
+ uart_set_fifo_trigger_levels(TRACEUART, UART_FIFO_RX_TRIG_1_2, UART_FIFO_TX_TRIG_7_8);
+
+ uart_clear_interrupt_flag(TRACEUART, UART_INT_RX | UART_INT_RT);
+
+ /* Enable interrupts */
+ uart_enable_interrupts(TRACEUART, UART_INT_RX | UART_INT_RT);
+
+ /* Finally enable the USART. */
+ uart_enable(TRACEUART);
+
+ nvic_set_priority(TRACEUART_IRQ, 0);
+ nvic_enable_irq(TRACEUART_IRQ);
+
+ /* Un-stall USB endpoint */
+ usbd_ep_stall_set(usbdev, 0x85, 0);
+
+ gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO3);
+}
+
+void traceswo_baud(unsigned int baud)
+{
+ uart_set_baudrate(TRACEUART, baud);
+ uart_set_databits(TRACEUART, 8);
+}
+
+#define FIFO_SIZE 256
+
+/* RX Fifo buffer */
+static volatile uint8_t buf_rx[FIFO_SIZE];
+/* Fifo in pointer, writes assumed to be atomic, should be only incremented within RX ISR */
+static volatile uint32_t buf_rx_in = 0;
+/* Fifo out pointer, writes assumed to be atomic, should be only incremented outside RX ISR */
+static volatile uint32_t buf_rx_out = 0;
+
+void trace_buf_push(void)
+{
+ size_t len;
+
+ if (buf_rx_in == buf_rx_out) {
+ return;
+ } else if (buf_rx_in > buf_rx_out) {
+ len = buf_rx_in - buf_rx_out;
+ } else {
+ len = FIFO_SIZE - buf_rx_out;
+ }
+
+ if (len > 64) {
+ len = 64;
+ }
+
+ if (usbd_ep_write_packet(usbdev, 0x85, (uint8_t *)&buf_rx[buf_rx_out], len) == len) {
+ buf_rx_out += len;
+ buf_rx_out %= FIFO_SIZE;
+ }
+}
+
+void trace_buf_drain(usbd_device *dev, uint8_t ep)
+{
+ (void) dev;
+ (void) ep;
+ trace_buf_push();
+}
+
+void trace_tick(void)
+{
+ trace_buf_push();
+}
+
+void TRACEUART_ISR(void)
+{
+ uint32_t flush = uart_is_interrupt_source(TRACEUART, UART_INT_RT);
+
+ while (!uart_is_rx_fifo_empty(TRACEUART)) {
+ uint32_t c = uart_recv(TRACEUART);
+
+ /* If the next increment of rx_in would put it at the same point
+ * as rx_out, the FIFO is considered full.
+ */
+ if (((buf_rx_in + 1) % FIFO_SIZE) != buf_rx_out)
+ {
+ /* insert into FIFO */
+ buf_rx[buf_rx_in++] = c;
+
+ /* wrap out pointer */
+ if (buf_rx_in >= FIFO_SIZE)
+ {
+ buf_rx_in = 0;
+ }
+ } else {
+ flush = 1;
+ break;
+ }
+ }
+
+ if (flush) {
+ /* advance fifo out pointer by amount written */
+ trace_buf_push();
+ }
+}
+
diff --git a/src/platforms/tm4c/usbuart.c b/src/platforms/tm4c/usbuart.c
new file mode 100644
index 0000000..bb769f0
--- /dev/null
+++ b/src/platforms/tm4c/usbuart.c
@@ -0,0 +1,182 @@
+/*
+ * This file is part of the Black Magic Debug project.
+ *
+ * Copyright (C) 2012 Black Sphere Technologies Ltd.
+ * Written by Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * Copyright (C) 2014 Fredrik Ahlberg <fredrik@z80.se>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/cm3/scs.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/cdc.h>
+#include <libopencm3/lm4f/rcc.h>
+#include <libopencm3/lm4f/uart.h>
+
+#include <platform.h>
+
+#define FIFO_SIZE 128
+
+/* RX Fifo buffer */
+static uint8_t buf_rx[FIFO_SIZE];
+/* Fifo in pointer, writes assumed to be atomic, should be only incremented within RX ISR */
+static uint8_t buf_rx_in;
+/* Fifo out pointer, writes assumed to be atomic, should be only incremented outside RX ISR */
+static uint8_t buf_rx_out;
+
+void usbuart_init(void)
+{
+ UART_PIN_SETUP();
+
+ periph_clock_enable(USBUART_CLK);
+ __asm__("nop"); __asm__("nop"); __asm__("nop");
+
+ uart_disable(USBUART);
+
+ /* Setup UART parameters. */
+ uart_clock_from_sysclk(USBUART);
+ uart_set_baudrate(USBUART, 38400);
+ uart_set_databits(USBUART, 8);
+ uart_set_stopbits(USBUART, 1);
+ uart_set_parity(USBUART, UART_PARITY_NONE);
+
+ // Enable FIFO
+ uart_enable_fifo(USBUART);
+
+ // Set FIFO interrupt trigger levels to 1/8 full for RX buffer and
+ // 7/8 empty (1/8 full) for TX buffer
+ uart_set_fifo_trigger_levels(USBUART, UART_FIFO_RX_TRIG_1_8, UART_FIFO_TX_TRIG_7_8);
+
+ uart_clear_interrupt_flag(USBUART, UART_INT_RX | UART_INT_RT);
+
+ /* Enable interrupts */
+ uart_enable_interrupts(UART0, UART_INT_RX| UART_INT_RT);
+
+ /* Finally enable the USART. */
+ uart_enable(USBUART);
+
+ //nvic_set_priority(USBUSART_IRQ, IRQ_PRI_USBUSART);
+ nvic_enable_irq(USBUART_IRQ);
+}
+
+void usbuart_set_line_coding(struct usb_cdc_line_coding *coding)
+{
+ uart_set_baudrate(USBUART, coding->dwDTERate);
+ uart_set_databits(USBUART, coding->bDataBits);
+ switch(coding->bCharFormat) {
+ case 0:
+ case 1:
+ uart_set_stopbits(USBUART, 1);
+ break;
+ case 2:
+ uart_set_stopbits(USBUART, 2);
+ break;
+ }
+ switch(coding->bParityType) {
+ case 0:
+ uart_set_parity(USBUART, UART_PARITY_NONE);
+ break;
+ case 1:
+ uart_set_parity(USBUART, UART_PARITY_ODD);
+ break;
+ case 2:
+ uart_set_parity(USBUART, UART_PARITY_EVEN);
+ break;
+ }
+}
+
+void usbuart_usb_out_cb(usbd_device *dev, uint8_t ep)
+{
+ (void)ep;
+
+ char buf[CDCACM_PACKET_SIZE];
+ int len = usbd_ep_read_packet(dev, CDCACM_UART_ENDPOINT,
+ buf, CDCACM_PACKET_SIZE);
+
+ for(int i = 0; i < len; i++)
+ uart_send_blocking(USBUART, buf[i]);
+}
+
+
+void usbuart_usb_in_cb(usbd_device *dev, uint8_t ep)
+{
+ (void) dev;
+ (void) ep;
+}
+
+/*
+ * Read a character from the UART RX and stuff it in a software FIFO.
+ * Allowed to read from FIFO out pointer, but not write to it.
+ * Allowed to write to FIFO in pointer.
+ */
+void USBUART_ISR(void)
+{
+ int flush = uart_is_interrupt_source(USBUART, UART_INT_RT);
+
+ while (!uart_is_rx_fifo_empty(USBUART)) {
+ char c = uart_recv(USBUART);
+
+ /* If the next increment of rx_in would put it at the same point
+ * as rx_out, the FIFO is considered full.
+ */
+ if (((buf_rx_in + 1) % FIFO_SIZE) != buf_rx_out)
+ {
+ /* insert into FIFO */
+ buf_rx[buf_rx_in++] = c;
+
+ /* wrap out pointer */
+ if (buf_rx_in >= FIFO_SIZE)
+ {
+ buf_rx_in = 0;
+ }
+ } else {
+ flush = 1;
+ }
+ }
+
+ if (flush) {
+ /* forcibly empty fifo if no USB endpoint */
+ if (cdcacm_get_config() != 1)
+ {
+ buf_rx_out = buf_rx_in;
+ return;
+ }
+
+ uint8_t packet_buf[CDCACM_PACKET_SIZE];
+ uint8_t packet_size = 0;
+ uint8_t buf_out = buf_rx_out;
+
+ /* copy from uart FIFO into local usb packet buffer */
+ while (buf_rx_in != buf_out && packet_size < CDCACM_PACKET_SIZE)
+ {
+ packet_buf[packet_size++] = buf_rx[buf_out++];
+
+ /* wrap out pointer */
+ if (buf_out >= FIFO_SIZE)
+ {
+ buf_out = 0;
+ }
+
+ }
+
+ /* advance fifo out pointer by amount written */
+ buf_rx_out += usbd_ep_write_packet(usbdev,
+ CDCACM_UART_ENDPOINT, packet_buf, packet_size);
+ buf_rx_out %= FIFO_SIZE;
+ }
+}
+