#endif
}
+static inline void socket_block(int fd)
+{
+#ifdef _WIN32
+ unsigned long nonblock = 0;
+ ioctlsocket(fd, FIONBIO, &nonblock);
+#else
+ int oldopts = fcntl(fd, F_GETFL, 0);
+ fcntl(fd, F_SETFL, oldopts & ~O_NONBLOCK);
+#endif
+}
+
static inline void socket_nonblock(int fd)
{
#ifdef _WIN32
/* low level command set
*/
-static int at91rm9200_read(void);
-static void at91rm9200_write(int tck, int tms, int tdi);
-static void at91rm9200_reset(int trst, int srst);
+static bb_value_t at91rm9200_read(void);
+static int at91rm9200_write(int tck, int tms, int tdi);
+static int at91rm9200_reset(int trst, int srst);
static int at91rm9200_init(void);
static int at91rm9200_quit(void);
.blink = 0
};
-static int at91rm9200_read(void)
+static bb_value_t at91rm9200_read(void)
{
- return (pio_base[device->TDO_PIO + PIO_PDSR] & device->TDO_MASK) != 0;
+ return (pio_base[device->TDO_PIO + PIO_PDSR] & device->TDO_MASK) ? BB_HIGH : BB_LOW;
}
-static void at91rm9200_write(int tck, int tms, int tdi)
+static int at91rm9200_write(int tck, int tms, int tdi)
{
if (tck)
pio_base[device->TCK_PIO + PIO_SODR] = device->TCK_MASK;
pio_base[device->TDI_PIO + PIO_SODR] = device->TDI_MASK;
else
pio_base[device->TDI_PIO + PIO_CODR] = device->TDI_MASK;
+
+ return ERROR_OK;
}
/* (1) assert or (0) deassert reset lines */
-static void at91rm9200_reset(int trst, int srst)
+static int at91rm9200_reset(int trst, int srst)
{
if (trst == 0)
pio_base[device->TRST_PIO + PIO_SODR] = device->TRST_MASK;
pio_base[device->SRST_PIO + PIO_SODR] = device->SRST_MASK;
else if (srst == 1)
pio_base[device->SRST_PIO + PIO_CODR] = device->SRST_MASK;
+
+ return ERROR_OK;
}
COMMAND_HANDLER(at91rm9200_handle_device_command)
static int dev_mem_fd;
static volatile uint32_t *pio_base;
-static int bcm2835gpio_read(void);
-static void bcm2835gpio_write(int tck, int tms, int tdi);
-static void bcm2835gpio_reset(int trst, int srst);
+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 speed_offset = 28;
static unsigned int jtag_delay;
-static int bcm2835gpio_read(void)
+static bb_value_t bcm2835gpio_read(void)
{
- return !!(GPIO_LEV & 1<<tdo_gpio);
+ return (GPIO_LEV & 1<<tdo_gpio) ? BB_HIGH : BB_LOW;
}
-static void bcm2835gpio_write(int tck, int tms, int tdi)
+static int bcm2835gpio_write(int tck, int tms, int tdi)
{
uint32_t set = tck<<tck_gpio | tms<<tms_gpio | tdi<<tdi_gpio;
uint32_t clear = !tck<<tck_gpio | !tms<<tms_gpio | !tdi<<tdi_gpio;
for (unsigned int i = 0; i < jtag_delay; i++)
asm volatile ("");
+
+ return ERROR_OK;
}
-static void bcm2835gpio_swd_write(int tck, int tms, int tdi)
+static int bcm2835gpio_swd_write(int tck, int tms, int tdi)
{
uint32_t set = tck<<swclk_gpio | tdi<<swdio_gpio;
uint32_t clear = !tck<<swclk_gpio | !tdi<<swdio_gpio;
for (unsigned int i = 0; i < jtag_delay; i++)
asm volatile ("");
+
+ return ERROR_OK;
}
/* (1) assert or (0) deassert reset lines */
-static void bcm2835gpio_reset(int trst, int srst)
+static int bcm2835gpio_reset(int trst, int srst)
{
uint32_t set = 0;
uint32_t clear = 0;
GPIO_SET = set;
GPIO_CLR = clear;
+
+ return ERROR_OK;
}
static void bcm2835_swdio_drive(bool is_output)
* this function checks the current stable state to decide on the value of TMS
* to use.
*/
-static void bitbang_stableclocks(int num_cycles);
+static int bitbang_stableclocks(int num_cycles);
static void bitbang_swd_write_reg(uint8_t cmd, uint32_t value, uint32_t ap_delay_clk);
/* The bitbang driver leaves the TCK 0 when in idle */
static void bitbang_end_state(tap_state_t state)
{
- if (tap_is_state_stable(state))
- tap_set_end_state(state);
- else {
- LOG_ERROR("BUG: %i is not a valid end state", state);
- exit(-1);
- }
+ assert(tap_is_state_stable(state));
+ tap_set_end_state(state);
}
-static void bitbang_state_move(int skip)
+static int bitbang_state_move(int skip)
{
int i = 0, tms = 0;
uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
for (i = skip; i < tms_count; i++) {
tms = (tms_scan >> i) & 1;
- bitbang_interface->write(0, tms, 0);
- bitbang_interface->write(1, tms, 0);
+ if (bitbang_interface->write(0, tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
+ if (bitbang_interface->write(1, tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
}
- bitbang_interface->write(CLOCK_IDLE(), tms, 0);
+ if (bitbang_interface->write(CLOCK_IDLE(), tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
tap_set_state(tap_get_end_state());
+ return ERROR_OK;
}
/**
int tms = 0;
for (unsigned i = 0; i < num_bits; i++) {
tms = ((bits[i/8] >> (i % 8)) & 1);
- bitbang_interface->write(0, tms, 0);
- bitbang_interface->write(1, tms, 0);
+ if (bitbang_interface->write(0, tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
+ if (bitbang_interface->write(1, tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
}
- bitbang_interface->write(CLOCK_IDLE(), tms, 0);
+ if (bitbang_interface->write(CLOCK_IDLE(), tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
return ERROR_OK;
}
-static void bitbang_path_move(struct pathmove_command *cmd)
+static int bitbang_path_move(struct pathmove_command *cmd)
{
int num_states = cmd->num_states;
int state_count;
exit(-1);
}
- bitbang_interface->write(0, tms, 0);
- bitbang_interface->write(1, tms, 0);
+ if (bitbang_interface->write(0, tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
+ if (bitbang_interface->write(1, tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
tap_set_state(cmd->path[state_count]);
state_count++;
num_states--;
}
- bitbang_interface->write(CLOCK_IDLE(), tms, 0);
+ if (bitbang_interface->write(CLOCK_IDLE(), tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
tap_set_end_state(tap_get_state());
+ return ERROR_OK;
}
-static void bitbang_runtest(int num_cycles)
+static int bitbang_runtest(int num_cycles)
{
int i;
/* only do a state_move when we're not already in IDLE */
if (tap_get_state() != TAP_IDLE) {
bitbang_end_state(TAP_IDLE);
- bitbang_state_move(0);
+ if (bitbang_state_move(0) != ERROR_OK)
+ return ERROR_FAIL;
}
/* execute num_cycles */
for (i = 0; i < num_cycles; i++) {
- bitbang_interface->write(0, 0, 0);
- bitbang_interface->write(1, 0, 0);
+ if (bitbang_interface->write(0, 0, 0) != ERROR_OK)
+ return ERROR_FAIL;
+ if (bitbang_interface->write(1, 0, 0) != ERROR_OK)
+ return ERROR_FAIL;
}
- bitbang_interface->write(CLOCK_IDLE(), 0, 0);
+ if (bitbang_interface->write(CLOCK_IDLE(), 0, 0) != ERROR_OK)
+ return ERROR_FAIL;
/* finish in end_state */
bitbang_end_state(saved_end_state);
if (tap_get_state() != tap_get_end_state())
- bitbang_state_move(0);
+ if (bitbang_state_move(0) != ERROR_OK)
+ return ERROR_FAIL;
+
+ return ERROR_OK;
}
-static void bitbang_stableclocks(int num_cycles)
+static int bitbang_stableclocks(int num_cycles)
{
int tms = (tap_get_state() == TAP_RESET ? 1 : 0);
int i;
/* send num_cycles clocks onto the cable */
for (i = 0; i < num_cycles; i++) {
- bitbang_interface->write(1, tms, 0);
- bitbang_interface->write(0, tms, 0);
+ if (bitbang_interface->write(1, tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
+ if (bitbang_interface->write(0, tms, 0) != ERROR_OK)
+ return ERROR_FAIL;
}
+
+ return ERROR_OK;
}
-static void bitbang_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
+static int bitbang_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
+ unsigned scan_size)
{
tap_state_t saved_end_state = tap_get_end_state();
- int bit_cnt;
+ unsigned bit_cnt;
if (!((!ir_scan &&
(tap_get_state() == TAP_DRSHIFT)) ||
else
bitbang_end_state(TAP_DRSHIFT);
- bitbang_state_move(0);
+ if (bitbang_state_move(0) != ERROR_OK)
+ return ERROR_FAIL;
bitbang_end_state(saved_end_state);
}
+ size_t buffered = 0;
for (bit_cnt = 0; bit_cnt < scan_size; bit_cnt++) {
- int val = 0;
int tms = (bit_cnt == scan_size-1) ? 1 : 0;
int tdi;
int bytec = bit_cnt/8;
if ((type != SCAN_IN) && (buffer[bytec] & bcval))
tdi = 1;
- bitbang_interface->write(0, tms, tdi);
-
- if (type != SCAN_OUT)
- val = bitbang_interface->read();
-
- bitbang_interface->write(1, tms, tdi);
+ if (bitbang_interface->write(0, tms, tdi) != ERROR_OK)
+ return ERROR_FAIL;
if (type != SCAN_OUT) {
- if (val)
- buffer[bytec] |= bcval;
- else
- buffer[bytec] &= ~bcval;
+ if (bitbang_interface->buf_size) {
+ if (bitbang_interface->sample() != ERROR_OK)
+ return ERROR_FAIL;
+ buffered++;
+ } else {
+ switch (bitbang_interface->read()) {
+ case BB_LOW:
+ buffer[bytec] &= ~bcval;
+ break;
+ case BB_HIGH:
+ buffer[bytec] |= bcval;
+ break;
+ default:
+ return ERROR_FAIL;
+ }
+ }
+ }
+
+ if (bitbang_interface->write(1, tms, tdi) != ERROR_OK)
+ return ERROR_FAIL;
+
+ if (type != SCAN_OUT && bitbang_interface->buf_size &&
+ (buffered == bitbang_interface->buf_size ||
+ bit_cnt == scan_size - 1)) {
+ for (unsigned i = bit_cnt + 1 - buffered; i <= bit_cnt; i++) {
+ switch (bitbang_interface->read_sample()) {
+ case BB_LOW:
+ buffer[i/8] &= ~(1 << (i % 8));
+ break;
+ case BB_HIGH:
+ buffer[i/8] |= 1 << (i % 8);
+ break;
+ default:
+ return ERROR_FAIL;
+ }
+ }
+ buffered = 0;
}
}
* the shift state, so we skip the first state
* and move directly to the end state.
*/
- bitbang_state_move(1);
+ if (bitbang_state_move(1) != ERROR_OK)
+ return ERROR_FAIL;
}
+ return ERROR_OK;
}
int bitbang_execute_queue(void)
*/
retval = ERROR_OK;
- if (bitbang_interface->blink)
- bitbang_interface->blink(1);
+ if (bitbang_interface->blink) {
+ if (bitbang_interface->blink(1) != ERROR_OK)
+ return ERROR_FAIL;
+ }
while (cmd) {
switch (cmd->type) {
if ((cmd->cmd.reset->trst == 1) ||
(cmd->cmd.reset->srst && (jtag_get_reset_config() & RESET_SRST_PULLS_TRST)))
tap_set_state(TAP_RESET);
- bitbang_interface->reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
+ if (bitbang_interface->reset(cmd->cmd.reset->trst,
+ cmd->cmd.reset->srst) != ERROR_OK)
+ return ERROR_FAIL;
break;
case JTAG_RUNTEST:
#ifdef _DEBUG_JTAG_IO_
tap_state_name(cmd->cmd.runtest->end_state));
#endif
bitbang_end_state(cmd->cmd.runtest->end_state);
- bitbang_runtest(cmd->cmd.runtest->num_cycles);
+ if (bitbang_runtest(cmd->cmd.runtest->num_cycles) != ERROR_OK)
+ return ERROR_FAIL;
break;
case JTAG_STABLECLOCKS:
/* this is only allowed while in a stable state. A check for a stable
* state was done in jtag_add_clocks()
*/
- bitbang_stableclocks(cmd->cmd.stableclocks->num_cycles);
+ if (bitbang_stableclocks(cmd->cmd.stableclocks->num_cycles) != ERROR_OK)
+ return ERROR_FAIL;
break;
case JTAG_TLR_RESET:
tap_state_name(cmd->cmd.statemove->end_state));
#endif
bitbang_end_state(cmd->cmd.statemove->end_state);
- bitbang_state_move(0);
+ if (bitbang_state_move(0) != ERROR_OK)
+ return ERROR_FAIL;
break;
case JTAG_PATHMOVE:
#ifdef _DEBUG_JTAG_IO_
cmd->cmd.pathmove->num_states,
tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
#endif
- bitbang_path_move(cmd->cmd.pathmove);
+ if (bitbang_path_move(cmd->cmd.pathmove) != ERROR_OK)
+ return ERROR_FAIL;
break;
case JTAG_SCAN:
+ bitbang_end_state(cmd->cmd.scan->end_state);
+ scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("%s scan end in %s",
+ LOG_DEBUG("%s scan %d bits; end in %s",
(cmd->cmd.scan->ir_scan) ? "IR" : "DR",
+ scan_size,
tap_state_name(cmd->cmd.scan->end_state));
#endif
- bitbang_end_state(cmd->cmd.scan->end_state);
- scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
type = jtag_scan_type(cmd->cmd.scan);
- bitbang_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
+ if (bitbang_scan(cmd->cmd.scan->ir_scan, type, buffer,
+ scan_size) != ERROR_OK)
+ return ERROR_FAIL;
if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
if (buffer)
}
cmd = cmd->next;
}
- if (bitbang_interface->blink)
- bitbang_interface->blink(0);
+ if (bitbang_interface->blink) {
+ if (bitbang_interface->blink(0) != ERROR_OK)
+ return ERROR_FAIL;
+ }
return retval;
}
#include <jtag/swd.h>
+typedef enum {
+ BB_LOW,
+ BB_HIGH,
+ BB_ERROR
+} bb_value_t;
+
+/** Low level callbacks (for bitbang).
+ *
+ * Either read(), or sample() and read_sample() must be implemented.
+ *
+ * The sample functions allow an interface to batch a number of writes and
+ * sample requests together. Not waiting for a value to come back can greatly
+ * increase throughput. */
struct bitbang_interface {
- /* low level callbacks (for bitbang)
- */
- int (*read)(void);
- void (*write)(int tck, int tms, int tdi);
- void (*reset)(int trst, int srst);
- void (*blink)(int on);
+ /** Sample TDO. */
+ bb_value_t (*read)(void);
+
+ /** The number of TDO samples that can be buffered up before the caller has
+ * to call read_sample. */
+ size_t buf_size;
+ /** Sample TDO and put the result in a buffer. */
+ int (*sample)(void);
+ /** Return the next unread value from the buffer. */
+ bb_value_t (*read_sample)(void);
+
+ /** Set TCK, TMS, and TDI to the given values. */
+ int (*write)(int tck, int tms, int tdi);
+ int (*reset)(int trst, int srst);
+ int (*blink)(int on);
int (*swdio_read)(void);
void (*swdio_drive)(bool on);
};
static uint32_t dummy_data;
-static int dummy_read(void)
+static bb_value_t dummy_read(void)
{
int data = 1 & dummy_data;
dummy_data = (dummy_data >> 1) | (1 << 31);
- return data;
+ return data ? BB_HIGH : BB_LOW;
}
-static void dummy_write(int tck, int tms, int tdi)
+static int dummy_write(int tck, int tms, int tdi)
{
/* TAP standard: "state transitions occur on rising edge of clock" */
if (tck != dummy_clock) {
}
dummy_clock = tck;
}
+ return ERROR_OK;
}
-static void dummy_reset(int trst, int srst)
+static int dummy_reset(int trst, int srst)
{
dummy_clock = 0;
dummy_state = TAP_RESET;
LOG_DEBUG("reset to: %s", tap_state_name(dummy_state));
+ return ERROR_OK;
}
-static void dummy_led(int on)
+static int dummy_led(int on)
{
+ return ERROR_OK;
}
static struct bitbang_interface dummy_bitbang = {
/* low level command set
*/
-static int ep93xx_read(void);
-static void ep93xx_write(int tck, int tms, int tdi);
-static void ep93xx_reset(int trst, int srst);
+static bb_value_t ep93xx_read(void);
+static int ep93xx_write(int tck, int tms, int tdi);
+static int ep93xx_reset(int trst, int srst);
static int ep93xx_init(void);
static int ep93xx_quit(void);
.blink = 0,
};
-static int ep93xx_read(void)
+static bb_value_t ep93xx_read(void)
{
- return !!(*gpio_data_register & TDO_BIT);
+ return (*gpio_data_register & TDO_BIT) ? BB_HIGH : BB_LOW;
}
-static void ep93xx_write(int tck, int tms, int tdi)
+static int ep93xx_write(int tck, int tms, int tdi)
{
if (tck)
output_value |= TCK_BIT;
*gpio_data_register = output_value;
nanosleep(&ep93xx_zzzz, NULL);
+
+ return ERROR_OK;
}
/* (1) assert or (0) deassert reset lines */
-static void ep93xx_reset(int trst, int srst)
+static int ep93xx_reset(int trst, int srst)
{
if (trst == 0)
output_value |= TRST_BIT;
*gpio_data_register = output_value;
nanosleep(&ep93xx_zzzz, NULL);
+
+ return ERROR_OK;
}
static int set_gonk_mode(void)
return pio_base[g / 32].dr >> (g & 0x1F) & 1;
}
-static int imx_gpio_read(void);
-static void imx_gpio_write(int tck, int tms, int tdi);
-static void imx_gpio_reset(int trst, int srst);
+static bb_value_t imx_gpio_read(void);
+static int imx_gpio_write(int tck, int tms, int tdi);
+static int imx_gpio_reset(int trst, int srst);
static int imx_gpio_swdio_read(void);
static void imx_gpio_swdio_drive(bool is_output);
static int speed_offset = 100;
static unsigned int jtag_delay;
-static int imx_gpio_read(void)
+static bb_value_t imx_gpio_read(void)
{
- return gpio_level(tdo_gpio);
+ return gpio_level(tdo_gpio) ? BB_HIGH : BB_LOW;
}
-static void imx_gpio_write(int tck, int tms, int tdi)
+static int imx_gpio_write(int tck, int tms, int tdi)
{
tms ? gpio_set(tms_gpio) : gpio_clear(tms_gpio);
tdi ? gpio_set(tdi_gpio) : gpio_clear(tdi_gpio);
for (unsigned int i = 0; i < jtag_delay; i++)
asm volatile ("");
+
+ return ERROR_OK;
}
-static void imx_gpio_swd_write(int tck, int tms, int tdi)
+static int imx_gpio_swd_write(int tck, int tms, int tdi)
{
tdi ? gpio_set(swdio_gpio) : gpio_clear(swdio_gpio);
tck ? gpio_set(swclk_gpio) : gpio_clear(swclk_gpio);
for (unsigned int i = 0; i < jtag_delay; i++)
asm volatile ("");
+
+ return ERROR_OK;
}
/* (1) assert or (0) deassert reset lines */
-static void imx_gpio_reset(int trst, int srst)
+static int imx_gpio_reset(int trst, int srst)
{
if (trst_gpio != -1)
trst ? gpio_set(trst_gpio) : gpio_clear(trst_gpio);
if (srst_gpio != -1)
srst ? gpio_set(srst_gpio) : gpio_clear(srst_gpio);
+
+ return ERROR_OK;
}
static void imx_gpio_swdio_drive(bool is_output)
LOG_INFO("imx_gpio mmap: pagesize: %u, regionsize: %u",
- sysconf(_SC_PAGE_SIZE), IMX_GPIO_REGS_COUNT * IMX_GPIO_SIZE);
+ (unsigned int) sysconf(_SC_PAGE_SIZE), IMX_GPIO_REGS_COUNT * IMX_GPIO_SIZE);
pio_base = mmap(NULL, IMX_GPIO_REGS_COUNT * IMX_GPIO_SIZE,
PROT_READ | PROT_WRITE,
MAP_SHARED, dev_mem_fd, imx_gpio_peri_base);
static unsigned long statusport;
#endif
-static int parport_read(void)
+static bb_value_t parport_read(void)
{
int data = 0;
#endif
if ((data ^ cable->INPUT_INVERT) & cable->TDO_MASK)
- return 1;
+ return BB_HIGH;
else
- return 0;
+ return BB_LOW;
}
static inline void parport_write_data(void)
#endif
}
-static void parport_write(int tck, int tms, int tdi)
+static int parport_write(int tck, int tms, int tdi)
{
int i = wait_states + 1;
while (i-- > 0)
parport_write_data();
+
+ return ERROR_OK;
}
/* (1) assert or (0) deassert reset lines */
-static void parport_reset(int trst, int srst)
+static int parport_reset(int trst, int srst)
{
LOG_DEBUG("trst: %i, srst: %i", trst, srst);
dataport_value &= ~cable->SRST_MASK;
parport_write_data();
+
+ return ERROR_OK;
}
/* turn LED on parport adapter on (1) or off (0) */
-static void parport_led(int on)
+static int parport_led(int on)
{
if (on)
dataport_value |= cable->LED_MASK;
dataport_value &= ~cable->LED_MASK;
parport_write_data();
+
+ return ERROR_OK;
}
static int parport_speed(int speed)
#endif /* PARPORT_USE_PPDEV */
- parport_reset(0, 0);
- parport_write(0, 0, 0);
- parport_led(1);
+ if (parport_reset(0, 0) != ERROR_OK)
+ return ERROR_FAIL;
+ if (parport_write(0, 0, 0) != ERROR_OK)
+ return ERROR_FAIL;
+ if (parport_led(1) != ERROR_OK)
+ return ERROR_FAIL;
bitbang_interface = &parport_bitbang;
static int parport_quit(void)
{
- parport_led(0);
+ if (parport_led(0) != ERROR_OK)
+ return ERROR_FAIL;
if (parport_exit) {
dataport_value = cable->PORT_EXIT;
/* arbitrary limit on host name length: */
#define REMOTE_BITBANG_HOST_MAX 255
-#define REMOTE_BITBANG_RAISE_ERROR(expr ...) \
- do { \
- LOG_ERROR(expr); \
- LOG_ERROR("Terminating openocd."); \
- exit(-1); \
- } while (0)
-
static char *remote_bitbang_host;
static char *remote_bitbang_port;
-FILE *remote_bitbang_in;
-FILE *remote_bitbang_out;
+static FILE *remote_bitbang_file;
+static int remote_bitbang_fd;
+
+/* Circular buffer. When start == end, the buffer is empty. */
+static char remote_bitbang_buf[64];
+static unsigned remote_bitbang_start;
+static unsigned remote_bitbang_end;
+
+static int remote_bitbang_buf_full(void)
+{
+ return remote_bitbang_end ==
+ ((remote_bitbang_start + sizeof(remote_bitbang_buf) - 1) %
+ sizeof(remote_bitbang_buf));
+}
-static void remote_bitbang_putc(int c)
+/* Read any incoming data, placing it into the buffer. */
+static int remote_bitbang_fill_buf(void)
{
- if (EOF == fputc(c, remote_bitbang_out))
- REMOTE_BITBANG_RAISE_ERROR("remote_bitbang_putc: %s", strerror(errno));
+ socket_nonblock(remote_bitbang_fd);
+ while (!remote_bitbang_buf_full()) {
+ unsigned contiguous_available_space;
+ if (remote_bitbang_end >= remote_bitbang_start) {
+ contiguous_available_space = sizeof(remote_bitbang_buf) -
+ remote_bitbang_end;
+ if (remote_bitbang_start == 0)
+ contiguous_available_space -= 1;
+ } else {
+ contiguous_available_space = remote_bitbang_start -
+ remote_bitbang_end - 1;
+ }
+ ssize_t count = read(remote_bitbang_fd,
+ remote_bitbang_buf + remote_bitbang_end,
+ contiguous_available_space);
+ if (count > 0) {
+ remote_bitbang_end += count;
+ if (remote_bitbang_end == sizeof(remote_bitbang_buf))
+ remote_bitbang_end = 0;
+ } else if (count == 0) {
+ return ERROR_OK;
+ } else if (count < 0) {
+ if (errno == EAGAIN) {
+ return ERROR_OK;
+ } else {
+ LOG_ERROR("remote_bitbang_fill_buf: %s (%d)",
+ strerror(errno), errno);
+ return ERROR_FAIL;
+ }
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static int remote_bitbang_putc(int c)
+{
+ if (EOF == fputc(c, remote_bitbang_file)) {
+ LOG_ERROR("remote_bitbang_putc: %s", strerror(errno));
+ return ERROR_FAIL;
+ }
+ return ERROR_OK;
}
static int remote_bitbang_quit(void)
{
- if (EOF == fputc('Q', remote_bitbang_out)) {
+ if (EOF == fputc('Q', remote_bitbang_file)) {
LOG_ERROR("fputs: %s", strerror(errno));
return ERROR_FAIL;
}
- if (EOF == fflush(remote_bitbang_out)) {
+ if (EOF == fflush(remote_bitbang_file)) {
LOG_ERROR("fflush: %s", strerror(errno));
return ERROR_FAIL;
}
/* We only need to close one of the FILE*s, because they both use the same */
/* underlying file descriptor. */
- if (EOF == fclose(remote_bitbang_out)) {
+ if (EOF == fclose(remote_bitbang_file)) {
LOG_ERROR("fclose: %s", strerror(errno));
return ERROR_FAIL;
}
return ERROR_OK;
}
-/* Get the next read response. */
-static int remote_bitbang_rread(void)
+static bb_value_t char_to_int(int c)
{
- if (EOF == fflush(remote_bitbang_out)) {
- remote_bitbang_quit();
- REMOTE_BITBANG_RAISE_ERROR("fflush: %s", strerror(errno));
- }
-
- int c = fgetc(remote_bitbang_in);
switch (c) {
case '0':
- return 0;
+ return BB_LOW;
case '1':
- return 1;
+ return BB_HIGH;
default:
remote_bitbang_quit();
- REMOTE_BITBANG_RAISE_ERROR(
- "remote_bitbang: invalid read response: %c(%i)", c, c);
+ LOG_ERROR("remote_bitbang: invalid read response: %c(%i)", c, c);
+ return BB_ERROR;
+ }
+}
+
+/* Get the next read response. */
+static bb_value_t remote_bitbang_rread(void)
+{
+ if (EOF == fflush(remote_bitbang_file)) {
+ remote_bitbang_quit();
+ LOG_ERROR("fflush: %s", strerror(errno));
+ return BB_ERROR;
+ }
+
+ /* Enable blocking access. */
+ socket_block(remote_bitbang_fd);
+ char c;
+ ssize_t count = read(remote_bitbang_fd, &c, 1);
+ if (count == 1) {
+ return char_to_int(c);
+ } else {
+ remote_bitbang_quit();
+ LOG_ERROR("read: count=%d, error=%s", (int) count, strerror(errno));
+ return BB_ERROR;
}
}
-static int remote_bitbang_read(void)
+static int remote_bitbang_sample(void)
{
- remote_bitbang_putc('R');
+ if (remote_bitbang_fill_buf() != ERROR_OK)
+ return ERROR_FAIL;
+ assert(!remote_bitbang_buf_full());
+ return remote_bitbang_putc('R');
+}
+
+static bb_value_t remote_bitbang_read_sample(void)
+{
+ if (remote_bitbang_start != remote_bitbang_end) {
+ int c = remote_bitbang_buf[remote_bitbang_start];
+ remote_bitbang_start =
+ (remote_bitbang_start + 1) % sizeof(remote_bitbang_buf);
+ return char_to_int(c);
+ }
return remote_bitbang_rread();
}
-static void remote_bitbang_write(int tck, int tms, int tdi)
+static int remote_bitbang_write(int tck, int tms, int tdi)
{
char c = '0' + ((tck ? 0x4 : 0x0) | (tms ? 0x2 : 0x0) | (tdi ? 0x1 : 0x0));
- remote_bitbang_putc(c);
+ return remote_bitbang_putc(c);
}
-static void remote_bitbang_reset(int trst, int srst)
+static int remote_bitbang_reset(int trst, int srst)
{
char c = 'r' + ((trst ? 0x2 : 0x0) | (srst ? 0x1 : 0x0));
- remote_bitbang_putc(c);
+ return remote_bitbang_putc(c);
}
-static void remote_bitbang_blink(int on)
+static int remote_bitbang_blink(int on)
{
char c = on ? 'B' : 'b';
- remote_bitbang_putc(c);
+ return remote_bitbang_putc(c);
}
static struct bitbang_interface remote_bitbang_bitbang = {
- .read = &remote_bitbang_read,
+ .buf_size = sizeof(remote_bitbang_buf) - 1,
+ .sample = &remote_bitbang_sample,
+ .read_sample = &remote_bitbang_read_sample,
.write = &remote_bitbang_write,
.reset = &remote_bitbang_reset,
.blink = &remote_bitbang_blink,
{
struct addrinfo hints = { .ai_family = AF_UNSPEC, .ai_socktype = SOCK_STREAM };
struct addrinfo *result, *rp;
- int fd;
+ int fd = 0;
LOG_INFO("Connecting to %s:%s",
remote_bitbang_host ? remote_bitbang_host : "localhost",
static int remote_bitbang_init(void)
{
- int fd;
bitbang_interface = &remote_bitbang_bitbang;
+ remote_bitbang_start = 0;
+ remote_bitbang_end = 0;
+
LOG_INFO("Initializing remote_bitbang driver");
if (remote_bitbang_port == NULL)
- fd = remote_bitbang_init_unix();
+ remote_bitbang_fd = remote_bitbang_init_unix();
else
- fd = remote_bitbang_init_tcp();
+ remote_bitbang_fd = remote_bitbang_init_tcp();
- if (fd < 0)
- return fd;
-
- remote_bitbang_in = fdopen(fd, "r");
- if (remote_bitbang_in == NULL) {
- LOG_ERROR("fdopen: failed to open read stream");
- close(fd);
- return ERROR_FAIL;
- }
+ if (remote_bitbang_fd < 0)
+ return remote_bitbang_fd;
- remote_bitbang_out = fdopen(fd, "w");
- if (remote_bitbang_out == NULL) {
+ remote_bitbang_file = fdopen(remote_bitbang_fd, "w+");
+ if (remote_bitbang_file == NULL) {
LOG_ERROR("fdopen: failed to open write stream");
- fclose(remote_bitbang_in);
+ close(remote_bitbang_fd);
return ERROR_FAIL;
}
* The sysfs value will read back either '0' or '1'. The trick here is to call
* lseek to bypass buffering in the sysfs kernel driver.
*/
-static int sysfsgpio_read(void)
+static bb_value_t sysfsgpio_read(void)
{
char buf[1];
return 0;
}
- return buf[0] != '0';
+ return buf[0] == '0' ? BB_LOW : BB_HIGH;
}
/*
* Seeing as this is the only function where the outputs are changed,
* we can cache the old value to avoid needlessly writing it.
*/
-static void sysfsgpio_write(int tck, int tms, int tdi)
+static int sysfsgpio_write(int tck, int tms, int tdi)
{
if (swd_mode) {
sysfsgpio_swdio_write(tck, tdi);
- return;
+ return ERROR_OK;
}
const char one[] = "1";
last_tdi = tdi;
last_tms = tms;
last_tck = tck;
+
+ return ERROR_OK;
}
/*
*
* (1) assert or (0) deassert reset lines
*/
-static void sysfsgpio_reset(int trst, int srst)
+static int sysfsgpio_reset(int trst, int srst)
{
LOG_DEBUG("sysfsgpio_reset");
const char one[] = "1";
if (bytes_written != 1)
LOG_WARNING("writing trst failed");
}
+
+ return ERROR_OK;
}
COMMAND_HANDLER(sysfsgpio_handle_jtag_gpionums)
projects / openocd / commitdiff