/* configuration */
static char* parport_cable = NULL;
-static u16 parport_port;
+static uint16_t parport_port;
static int parport_exit = 0;
+static uint32_t parport_toggling_time_ns = 1000;
+static int wait_states;
/* interface variables
*/
static unsigned long statusport;
#endif
-/* low level command set
- */
-static int parport_read(void);
-static void parport_write(int tck, int tms, int tdi);
-static void parport_reset(int trst, int srst);
-static void parport_led(int on);
-
-static int parport_speed(int speed);
-static int parport_register_commands(struct command_context_s *cmd_ctx);
-static int parport_init(void);
-static int parport_quit(void);
-
-/* interface commands */
-static int parport_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-static int parport_handle_parport_cable_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-static int parport_handle_write_on_exit_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-
-jtag_interface_t parport_interface =
-{
- .name = "parport",
-
- .execute_queue = bitbang_execute_queue,
-
- .speed = parport_speed,
- .register_commands = parport_register_commands,
- .init = parport_init,
- .quit = parport_quit,
-};
-
-static bitbang_interface_t parport_bitbang =
-{
- .read = parport_read,
- .write = parport_write,
- .reset = parport_reset,
- .blink = parport_led
-};
-
static int parport_read(void)
{
int data = 0;
static void parport_write(int tck, int tms, int tdi)
{
- int i = jtag_get_speed() + 1;
+ int i = wait_states + 1;
if (tck)
dataport_value |= cable->TCK_MASK;
static int parport_speed(int speed)
{
+ wait_states = speed;
return ERROR_OK;
}
-static int parport_register_commands(struct command_context_s *cmd_ctx)
+static int parport_khz(int khz, int* jtag_speed)
{
- register_command(cmd_ctx, NULL, "parport_port", parport_handle_parport_port_command,
- COMMAND_CONFIG, "either the address of the I/O port or the number of the \91/dev/parport\92 device");
- register_command(cmd_ctx, NULL, "parport_cable", parport_handle_parport_cable_command,
- COMMAND_CONFIG, "the layout of the parallel port cable used to connect to the target");
- register_command(cmd_ctx, NULL, "parport_write_on_exit", parport_handle_write_on_exit_command,
- COMMAND_CONFIG, "configure the parallel driver to write a known value to the parallel interface");
+ if (khz == 0) {
+ LOG_DEBUG("RCLK not supported");
+ return ERROR_FAIL;
+ }
+ *jtag_speed = 499999 / (khz * parport_toggling_time_ns);
+ return ERROR_OK;
+}
+
+static int parport_speed_div(int speed, int* khz)
+{
+ uint32_t denominator = (speed + 1) * parport_toggling_time_ns;
+
+ *khz = (499999 + denominator) / denominator;
return ERROR_OK;
}
OSVERSIONINFO version;
version.dwOSVersionInfoSize = sizeof version;
- if (!GetVersionEx( &version )) {
+ if (!GetVersionEx(&version)) {
errno = EINVAL;
return -1;
}
if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
return 0;
- h = CreateFile( "\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
+ h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (h == INVALID_HANDLE_VALUE) {
errno = ENODEV;
return -1;
}
- CloseHandle( h );
+ CloseHandle(h);
return 0;
}
#endif
+static bitbang_interface_t parport_bitbang = {
+ .read = &parport_read,
+ .write = &parport_write,
+ .reset = &parport_reset,
+ .blink = &parport_led,
+ };
+
static int parport_init(void)
{
cable_t *cur_cable;
if (device_handle < 0)
{
- LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
+ int err = errno;
+ LOG_ERROR("cannot open device. check it exists and that user read and write rights are set. errno=%d", err);
return ERROR_JTAG_INIT_FAILED;
}
LOG_DEBUG("...open");
#if !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__)
- i=ioctl(device_handle, PPCLAIM);
- if (i<0)
+ i = ioctl(device_handle, PPCLAIM);
+ if (i < 0)
{
LOG_ERROR("cannot claim device");
return ERROR_JTAG_INIT_FAILED;
i = PARPORT_MODE_COMPAT;
i= ioctl(device_handle, PPSETMODE, & i);
- if (i<0)
+ if (i < 0)
{
LOG_ERROR(" cannot set compatible mode to device");
return ERROR_JTAG_INIT_FAILED;
i = IEEE1284_MODE_COMPAT;
i = ioctl(device_handle, PPNEGOT, & i);
- if (i<0)
+ if (i < 0)
{
LOG_ERROR("cannot set compatible 1284 mode to device");
return ERROR_JTAG_INIT_FAILED;
bitbang_interface = &parport_bitbang;
+ wait_states = jtag_get_speed();
+
return ERROR_OK;
}
return ERROR_OK;
}
-static int parport_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(parport_handle_parport_port_command)
{
if (argc == 1)
{
/* only if the port wasn't overwritten by cmdline */
if (parport_port == 0)
{
- int retval = parse_u16(args[0], &parport_port);
- if (ERROR_OK != retval)
- return retval;
+ COMMAND_PARSE_NUMBER(u16, args[0], parport_port);
}
else
{
return ERROR_OK;
}
-static int parport_handle_parport_cable_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(parport_handle_parport_cable_command)
{
if (argc == 0)
return ERROR_OK;
return ERROR_OK;
}
-static int parport_handle_write_on_exit_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(parport_handle_write_on_exit_command)
{
if (argc != 1)
{
- command_print(cmd_ctx, "usage: parport_write_on_exit <on|off>");
+ command_print(cmd_ctx, "usage: parport_write_on_exit <on | off>");
return ERROR_OK;
}
return ERROR_OK;
}
+
+static int
+parport_handle_parport_toggling_time_command(struct command_context_s *cmd_ctx,
+ char *cmd, char **args, int argc)
+{
+ if (argc == 1) {
+ uint32_t ns;
+ int retval = parse_u32(args[0], &ns);
+
+ if (ERROR_OK != retval)
+ return retval;
+
+ if (ns == 0) {
+ LOG_ERROR("0 ns is not a valid parport toggling time");
+ return ERROR_FAIL;
+ }
+
+ parport_toggling_time_ns = ns;
+ wait_states = jtag_get_speed();
+ }
+
+ command_print(cmd_ctx, "parport toggling time = %" PRIu32 " ns",
+ parport_toggling_time_ns);
+
+ return ERROR_OK;
+}
+
+static int parport_register_commands(struct command_context_s *cmd_ctx)
+{
+ register_command(cmd_ctx, NULL, "parport_port",
+ parport_handle_parport_port_command, COMMAND_CONFIG,
+ "either the address of the I/O port "
+ "or the number of the '/dev/parport' device");
+
+ register_command(cmd_ctx, NULL, "parport_cable",
+ parport_handle_parport_cable_command, COMMAND_CONFIG,
+ "the layout of the parallel port cable "
+ "used to connect to the target");
+
+ register_command(cmd_ctx, NULL, "parport_write_on_exit",
+ parport_handle_write_on_exit_command, COMMAND_CONFIG,
+ "configure the parallel driver to write "
+ "a known value to the parallel interface");
+
+ register_command(cmd_ctx, NULL, "parport_toggling_time",
+ parport_handle_parport_toggling_time_command, COMMAND_ANY,
+ "time <ns> it takes for the hardware to toggle TCK");
+
+ return ERROR_OK;
+}
+
+jtag_interface_t parport_interface = {
+ .name = "parport",
+ .register_commands = parport_register_commands,
+ .init = parport_init,
+ .quit = parport_quit,
+ .khz = parport_khz,
+ .speed_div = parport_speed_div,
+ .speed = parport_speed,
+ .execute_queue = bitbang_execute_queue,
+};
projects / fw / openocd / blobdiff