#endif
#include <jtag/interface.h>
+#include <transport/transport.h>
#include "bitbang.h"
#include <sys/mman.h>
static bb_value_t bcm2835gpio_read(void);
static int bcm2835gpio_write(int tck, int tms, int tdi);
-static int bcm2835gpio_reset(int trst, int srst);
static int bcm2835_swdio_read(void);
static void bcm2835_swdio_drive(bool is_output);
+static int bcm2835gpio_swd_write(int swclk, int swdio);
static int bcm2835gpio_init(void);
static int bcm2835gpio_quit(void);
static struct bitbang_interface bcm2835gpio_bitbang = {
.read = bcm2835gpio_read,
.write = bcm2835gpio_write,
- .reset = bcm2835gpio_reset,
.swdio_read = bcm2835_swdio_read,
.swdio_drive = bcm2835_swdio_drive,
+ .swd_write = bcm2835gpio_swd_write,
.blink = NULL
};
return ERROR_OK;
}
-static int bcm2835gpio_swd_write(int tck, int tms, int tdi)
+static int bcm2835gpio_swd_write(int swclk, int swdio)
{
- uint32_t set = tck<<swclk_gpio | tdi<<swdio_gpio;
- uint32_t clear = !tck<<swclk_gpio | !tdi<<swdio_gpio;
+ uint32_t set = swclk << swclk_gpio | swdio << swdio_gpio;
+ uint32_t clear = !swclk << swclk_gpio | !swdio << swdio_gpio;
GPIO_SET = set;
GPIO_CLR = clear;
return ERROR_COMMAND_SYNTAX_ERROR;
}
- command_print(CMD_CTX,
+ command_print(CMD,
"BCM2835 GPIO config: tck = %d, tms = %d, tdi = %d, tdo = %d",
tck_gpio, tms_gpio, tdi_gpio, tdo_gpio);
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], tck_gpio);
- command_print(CMD_CTX, "BCM2835 GPIO config: tck = %d", tck_gpio);
+ command_print(CMD, "BCM2835 GPIO config: tck = %d", tck_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], tms_gpio);
- command_print(CMD_CTX, "BCM2835 GPIO config: tms = %d", tms_gpio);
+ command_print(CMD, "BCM2835 GPIO config: tms = %d", tms_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], tdo_gpio);
- command_print(CMD_CTX, "BCM2835 GPIO config: tdo = %d", tdo_gpio);
+ command_print(CMD, "BCM2835 GPIO config: tdo = %d", tdo_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], tdi_gpio);
- command_print(CMD_CTX, "BCM2835 GPIO config: tdi = %d", tdi_gpio);
+ command_print(CMD, "BCM2835 GPIO config: tdi = %d", tdi_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], srst_gpio);
- command_print(CMD_CTX, "BCM2835 GPIO config: srst = %d", srst_gpio);
+ command_print(CMD, "BCM2835 GPIO config: srst = %d", srst_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], trst_gpio);
- command_print(CMD_CTX, "BCM2835 GPIO config: trst = %d", trst_gpio);
+ command_print(CMD, "BCM2835 GPIO config: trst = %d", trst_gpio);
return ERROR_OK;
}
return ERROR_COMMAND_SYNTAX_ERROR;
}
- command_print(CMD_CTX,
+ command_print(CMD,
"BCM2835 GPIO nums: swclk = %d, swdio = %d",
swclk_gpio, swdio_gpio);
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], swclk_gpio);
- command_print(CMD_CTX, "BCM2835 num: swclk = %d", swclk_gpio);
+ command_print(CMD, "BCM2835 num: swclk = %d", swclk_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], swdio_gpio);
- command_print(CMD_CTX, "BCM2835 num: swdio = %d", swdio_gpio);
+ command_print(CMD, "BCM2835 num: swdio = %d", swdio_gpio);
return ERROR_OK;
}
COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], speed_offset);
}
- command_print(CMD_CTX, "BCM2835 GPIO: speed_coeffs = %d, speed_offset = %d",
+ command_print(CMD, "BCM2835 GPIO: speed_coeffs = %d, speed_offset = %d",
speed_coeff, speed_offset);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], bcm2835_peri_base);
- command_print(CMD_CTX, "BCM2835 GPIO: peripheral_base = 0x%08x",
+ command_print(CMD, "BCM2835 GPIO: peripheral_base = 0x%08x",
bcm2835_peri_base);
return ERROR_OK;
}
static const char * const bcm2835_transports[] = { "jtag", "swd", NULL };
-struct jtag_interface bcm2835gpio_interface = {
- .name = "bcm2835gpio",
+static struct jtag_interface bcm2835gpio_interface = {
.supported = DEBUG_CAP_TMS_SEQ,
.execute_queue = bitbang_execute_queue,
+};
+
+struct adapter_driver bcm2835gpio_adapter_driver = {
+ .name = "bcm2835gpio",
.transports = bcm2835_transports,
- .swd = &bitbang_swd,
- .speed = bcm2835gpio_speed,
- .khz = bcm2835gpio_khz,
- .speed_div = bcm2835gpio_speed_div,
.commands = bcm2835gpio_command_handlers,
+
.init = bcm2835gpio_init,
.quit = bcm2835gpio_quit,
+ .reset = bcm2835gpio_reset,
+ .speed = bcm2835gpio_speed,
+ .khz = bcm2835gpio_khz,
+ .speed_div = bcm2835gpio_speed_div,
+
+ .jtag_ops = &bcm2835gpio_interface,
+ .swd_ops = &bitbang_swd,
};
static bool bcm2835gpio_jtag_mode_possible(void)
LOG_INFO("BCM2835 GPIO JTAG/SWD bitbang driver");
- if (bcm2835gpio_jtag_mode_possible()) {
- if (bcm2835gpio_swd_mode_possible())
- LOG_INFO("JTAG and SWD modes enabled");
- else
- LOG_INFO("JTAG only mode enabled (specify swclk and swdio gpio to add SWD mode)");
- } else if (bcm2835gpio_swd_mode_possible()) {
- LOG_INFO("SWD only mode enabled (specify tck, tms, tdi and tdo gpios to add JTAG mode)");
- } else {
- LOG_ERROR("Require tck, tms, tdi and tdo gpios for JTAG mode and/or swclk and swdio gpio for SWD mode");
+ if (transport_is_jtag() && !bcm2835gpio_jtag_mode_possible()) {
+ LOG_ERROR("Require tck, tms, tdi and tdo gpios for JTAG mode");
return ERROR_JTAG_INIT_FAILED;
}
- dev_mem_fd = open("/dev/mem", O_RDWR | O_SYNC);
+ if (transport_is_swd() && !bcm2835gpio_swd_mode_possible()) {
+ LOG_ERROR("Require swclk and swdio gpio for SWD mode");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ dev_mem_fd = open("/dev/gpiomem", O_RDWR | O_SYNC);
+ if (dev_mem_fd < 0) {
+ LOG_DEBUG("Cannot open /dev/gpiomem, fallback to /dev/mem");
+ dev_mem_fd = open("/dev/mem", O_RDWR | O_SYNC);
+ }
if (dev_mem_fd < 0) {
- perror("open");
+ LOG_ERROR("open: %s", strerror(errno));
return ERROR_JTAG_INIT_FAILED;
}
MAP_SHARED, dev_mem_fd, BCM2835_GPIO_BASE);
if (pio_base == MAP_FAILED) {
- perror("mmap");
+ LOG_ERROR("mmap: %s", strerror(errno));
close(dev_mem_fd);
return ERROR_JTAG_INIT_FAILED;
}
MAP_SHARED, dev_mem_fd, BCM2835_PADS_GPIO_0_27);
if (pads_base == MAP_FAILED) {
- perror("mmap");
+ LOG_ERROR("mmap: %s", strerror(errno));
close(dev_mem_fd);
return ERROR_JTAG_INIT_FAILED;
}
/* set 4mA drive strength, slew rate limited, hysteresis on */
pads_base[BCM2835_PADS_GPIO_0_27_OFFSET] = 0x5a000008 + 1;
- tdo_gpio_mode = MODE_GPIO(tdo_gpio);
- tdi_gpio_mode = MODE_GPIO(tdi_gpio);
- tck_gpio_mode = MODE_GPIO(tck_gpio);
- tms_gpio_mode = MODE_GPIO(tms_gpio);
- swclk_gpio_mode = MODE_GPIO(swclk_gpio);
- swdio_gpio_mode = MODE_GPIO(swdio_gpio);
/*
* Configure TDO as an input, and TDI, TCK, TMS, TRST, SRST
* as outputs. Drive TDI and TCK low, and TMS/TRST/SRST high.
*/
- INP_GPIO(tdo_gpio);
-
- GPIO_CLR = 1<<tdi_gpio | 1<<tck_gpio | 1<<swdio_gpio | 1<<swclk_gpio;
- GPIO_SET = 1<<tms_gpio;
-
- OUT_GPIO(tdi_gpio);
- OUT_GPIO(tck_gpio);
- OUT_GPIO(tms_gpio);
- OUT_GPIO(swclk_gpio);
- OUT_GPIO(swdio_gpio);
- if (trst_gpio != -1) {
- trst_gpio_mode = MODE_GPIO(trst_gpio);
- GPIO_SET = 1 << trst_gpio;
- OUT_GPIO(trst_gpio);
+ if (transport_is_jtag()) {
+ tdo_gpio_mode = MODE_GPIO(tdo_gpio);
+ tdi_gpio_mode = MODE_GPIO(tdi_gpio);
+ tck_gpio_mode = MODE_GPIO(tck_gpio);
+ tms_gpio_mode = MODE_GPIO(tms_gpio);
+
+ INP_GPIO(tdo_gpio);
+
+ GPIO_CLR = 1<<tdi_gpio | 1<<tck_gpio;
+ GPIO_SET = 1<<tms_gpio;
+
+ OUT_GPIO(tdi_gpio);
+ OUT_GPIO(tck_gpio);
+ OUT_GPIO(tms_gpio);
+
+ if (trst_gpio != -1) {
+ trst_gpio_mode = MODE_GPIO(trst_gpio);
+ GPIO_SET = 1 << trst_gpio;
+ OUT_GPIO(trst_gpio);
+ }
+ }
+
+ if (transport_is_swd()) {
+ swclk_gpio_mode = MODE_GPIO(swclk_gpio);
+ swdio_gpio_mode = MODE_GPIO(swdio_gpio);
+
+ GPIO_CLR = 1<<swdio_gpio | 1<<swclk_gpio;
+
+ OUT_GPIO(swclk_gpio);
+ OUT_GPIO(swdio_gpio);
}
+
if (srst_gpio != -1) {
srst_gpio_mode = MODE_GPIO(srst_gpio);
GPIO_SET = 1 << srst_gpio;
"tdo %d trst %d srst %d", tck_gpio_mode, tms_gpio_mode,
tdi_gpio_mode, tdo_gpio_mode, trst_gpio_mode, srst_gpio_mode);
- if (swd_mode) {
- bcm2835gpio_bitbang.write = bcm2835gpio_swd_write;
- bitbang_switch_to_swd();
- }
-
return ERROR_OK;
}
static int bcm2835gpio_quit(void)
{
- SET_MODE_GPIO(tdo_gpio, tdo_gpio_mode);
- SET_MODE_GPIO(tdi_gpio, tdi_gpio_mode);
- SET_MODE_GPIO(tck_gpio, tck_gpio_mode);
- SET_MODE_GPIO(tms_gpio, tms_gpio_mode);
- SET_MODE_GPIO(swclk_gpio, swclk_gpio_mode);
- SET_MODE_GPIO(swdio_gpio, swdio_gpio_mode);
- if (trst_gpio != -1)
- SET_MODE_GPIO(trst_gpio, trst_gpio_mode);
+ if (transport_is_jtag()) {
+ SET_MODE_GPIO(tdo_gpio, tdo_gpio_mode);
+ SET_MODE_GPIO(tdi_gpio, tdi_gpio_mode);
+ SET_MODE_GPIO(tck_gpio, tck_gpio_mode);
+ SET_MODE_GPIO(tms_gpio, tms_gpio_mode);
+ if (trst_gpio != -1)
+ SET_MODE_GPIO(trst_gpio, trst_gpio_mode);
+ }
+
+ if (transport_is_swd()) {
+ SET_MODE_GPIO(swclk_gpio, swclk_gpio_mode);
+ SET_MODE_GPIO(swdio_gpio, swdio_gpio_mode);
+ }
+
if (srst_gpio != -1)
SET_MODE_GPIO(srst_gpio, srst_gpio_mode);