diff options
Diffstat (limited to 'src/jtag/drivers/gw16012.c')
| -rw-r--r-- | src/jtag/drivers/gw16012.c | 583 |
1 files changed, 583 insertions, 0 deletions
diff --git a/src/jtag/drivers/gw16012.c b/src/jtag/drivers/gw16012.c new file mode 100644 index 00000000..b827fd53 --- /dev/null +++ b/src/jtag/drivers/gw16012.c @@ -0,0 +1,583 @@ +/*************************************************************************** + * Copyright (C) 2006 by Dominic Rath * + * Dominic.Rath@gmx.de * + * * + * 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 2 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, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "interface.h" +#include "commands.h" + + +#if 1 +#define _DEBUG_GW16012_IO_ +#endif + +/* system includes */ +/* -ino: 060521-1036 */ +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) + +#include <machine/sysarch.h> +#include <machine/cpufunc.h> +#define ioperm(startport,length,enable)\ + i386_set_ioperm((startport), (length), (enable)) + +#else + +#endif /* __FreeBSD__, __FreeBSD_kernel__ */ + + +#if PARPORT_USE_PPDEV == 1 +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) +#include <dev/ppbus/ppi.h> +#include <dev/ppbus/ppbconf.h> +#define PPRSTATUS PPIGSTATUS +#define PPWDATA PPISDATA +#else +#include <linux/parport.h> +#include <linux/ppdev.h> +#endif +#include <fcntl.h> +#include <sys/ioctl.h> +#else /* not PARPORT_USE_PPDEV */ +#ifndef _WIN32 +#include <sys/io.h> +#endif +#endif + +#if PARPORT_USE_GIVEIO == 1 && IS_CYGWIN == 1 +#include <windows.h> +#endif + + +/* configuration */ +uint16_t gw16012_port; + +/* interface variables + */ +static uint8_t gw16012_msb = 0x0; +static uint8_t gw16012_control_value = 0x0; + +#if PARPORT_USE_PPDEV == 1 +static int device_handle; +#endif + +static void gw16012_data(uint8_t value) +{ + value = (value & 0x7f) | gw16012_msb; + gw16012_msb ^= 0x80; /* toggle MSB */ + +#ifdef _DEBUG_GW16012_IO_ + LOG_DEBUG("%2.2x", value); +#endif + + #if PARPORT_USE_PPDEV == 1 + ioctl(device_handle, PPWDATA, &value); + #else + #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) + outb(gw16012_port, value); + #else + outb(value, gw16012_port); + #endif + #endif +} + +static void gw16012_control(uint8_t value) +{ + if (value != gw16012_control_value) + { + gw16012_control_value = value; + +#ifdef _DEBUG_GW16012_IO_ + LOG_DEBUG("%2.2x", gw16012_control_value); +#endif + + #if PARPORT_USE_PPDEV == 1 + ioctl(device_handle, PPWCONTROL, &gw16012_control_value); + #else + #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) + outb(gw16012_port + 2, gw16012_control_value); + #else + outb(gw16012_control_value, gw16012_port + 2); + #endif + #endif + } +} + +static void gw16012_input(uint8_t *value) +{ + #if PARPORT_USE_PPDEV == 1 + ioctl(device_handle, PPRSTATUS, value); + #else + *value = inb(gw16012_port + 1); + #endif + +#ifdef _DEBUG_GW16012_IO_ + LOG_DEBUG("%2.2x", *value); +#endif +} + +/* (1) assert or (0) deassert reset lines */ +static void gw16012_reset(int trst, int srst) +{ + LOG_DEBUG("trst: %i, srst: %i", trst, srst); + + if (trst == 0) + gw16012_control(0x0d); + else if (trst == 1) + gw16012_control(0x0c); + + if (srst == 0) + gw16012_control(0x0a); + else if (srst == 1) + gw16012_control(0x0b); +} + +static int gw16012_speed(int speed) +{ + + return ERROR_OK; +} + +static void gw16012_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); + } +} + +static void gw16012_state_move(void) +{ + int i = 0, tms = 0; + uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state()); + int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state()); + + gw16012_control(0x0); /* single-bit mode */ + + for (i = 0; i < tms_count; i++) + { + tms = (tms_scan >> i) & 1; + gw16012_data(tms << 1); /* output next TMS bit */ + } + + tap_set_state(tap_get_end_state()); +} + +static void gw16012_path_move(struct pathmove_command *cmd) +{ + int num_states = cmd->num_states; + int state_count; + + state_count = 0; + while (num_states) + { + gw16012_control(0x0); /* single-bit mode */ + if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count]) + { + gw16012_data(0x0); /* TCK cycle with TMS low */ + } + else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count]) + { + gw16012_data(0x2); /* TCK cycle with TMS high */ + } + else + { + LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count])); + exit(-1); + } + + tap_set_state(cmd->path[state_count]); + state_count++; + num_states--; + } + + tap_set_end_state(tap_get_state()); +} + +static void gw16012_runtest(int num_cycles) +{ + tap_state_t saved_end_state = tap_get_end_state(); + int i; + + /* only do a state_move when we're not already in IDLE */ + if (tap_get_state() != TAP_IDLE) + { + gw16012_end_state(TAP_IDLE); + gw16012_state_move(); + } + + for (i = 0; i < num_cycles; i++) + { + gw16012_control(0x0); /* single-bit mode */ + gw16012_data(0x0); /* TMS cycle with TMS low */ + } + + gw16012_end_state(saved_end_state); + if (tap_get_state() != tap_get_end_state()) + gw16012_state_move(); +} + +static void gw16012_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size) +{ + int bits_left = scan_size; + int bit_count = 0; + tap_state_t saved_end_state = tap_get_end_state(); + uint8_t scan_out, scan_in; + + /* only if we're not already in the correct Shift state */ + if (!((!ir_scan && (tap_get_state() == TAP_DRSHIFT)) || (ir_scan && (tap_get_state() == TAP_IRSHIFT)))) + { + if (ir_scan) + gw16012_end_state(TAP_IRSHIFT); + else + gw16012_end_state(TAP_DRSHIFT); + + gw16012_state_move(); + gw16012_end_state(saved_end_state); + } + + while (type == SCAN_OUT && ((bits_left - 1) > 7)) + { + gw16012_control(0x2); /* seven-bit mode */ + scan_out = buf_get_u32(buffer, bit_count, 7); + gw16012_data(scan_out); + bit_count += 7; + bits_left -= 7; + } + + gw16012_control(0x0); /* single-bit mode */ + while (bits_left-- > 0) + { + uint8_t tms = 0; + + scan_out = buf_get_u32(buffer, bit_count, 1); + + if (bits_left == 0) /* last bit */ + { + if ((ir_scan && (tap_get_end_state() == TAP_IRSHIFT)) + || (!ir_scan && (tap_get_end_state() == TAP_DRSHIFT))) + { + tms = 0; + } + else + { + tms = 2; + } + } + + gw16012_data(scan_out | tms); + + if (type != SCAN_OUT) + { + gw16012_input(&scan_in); + buf_set_u32(buffer, bit_count, 1, ((scan_in & 0x08) >> 3)); + } + + bit_count++; + } + + if (!((ir_scan && (tap_get_end_state() == TAP_IRSHIFT)) || + (!ir_scan && (tap_get_end_state() == TAP_DRSHIFT)))) + { + gw16012_data(0x0); + if (ir_scan) + tap_set_state(TAP_IRPAUSE); + else + tap_set_state(TAP_DRPAUSE); + + if (tap_get_state() != tap_get_end_state()) + gw16012_state_move(); + } +} + +static int gw16012_execute_queue(void) +{ + struct jtag_command *cmd = jtag_command_queue; /* currently processed command */ + int scan_size; + enum scan_type type; + uint8_t *buffer; + int retval; + + /* return ERROR_OK, unless a jtag_read_buffer returns a failed check + * that wasn't handled by a caller-provided error handler + */ + retval = ERROR_OK; + + while (cmd) + { + switch (cmd->type) + { + case JTAG_RESET: +#ifdef _DEBUG_JTAG_IO_ + LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst); +#endif + if (cmd->cmd.reset->trst == 1) + { + tap_set_state(TAP_RESET); + } + gw16012_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst); + break; + case JTAG_RUNTEST: +#ifdef _DEBUG_JTAG_IO_ + LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state); +#endif + gw16012_end_state(cmd->cmd.runtest->end_state); + gw16012_runtest(cmd->cmd.runtest->num_cycles); + break; + case JTAG_STATEMOVE: +#ifdef _DEBUG_JTAG_IO_ + LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state); +#endif + gw16012_end_state(cmd->cmd.statemove->end_state); + gw16012_state_move(); + break; + case JTAG_PATHMOVE: +#ifdef _DEBUG_JTAG_IO_ + LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]); +#endif + gw16012_path_move(cmd->cmd.pathmove); + break; + case JTAG_SCAN: + gw16012_end_state(cmd->cmd.scan->end_state); + scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer); + type = jtag_scan_type(cmd->cmd.scan); +#ifdef _DEBUG_JTAG_IO_ + LOG_DEBUG("%s scan (%i) %i bit end in %i", (cmd->cmd.scan->ir_scan) ? "ir" : "dr", + type, scan_size, cmd->cmd.scan->end_state); +#endif + gw16012_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size); + if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK) + retval = ERROR_JTAG_QUEUE_FAILED; + if (buffer) + free(buffer); + break; + case JTAG_SLEEP: +#ifdef _DEBUG_JTAG_IO_ + LOG_DEBUG("sleep %i", cmd->cmd.sleep->us); +#endif + jtag_sleep(cmd->cmd.sleep->us); + break; + default: + LOG_ERROR("BUG: unknown JTAG command type encountered"); + exit(-1); + } + cmd = cmd->next; + } + + return retval; +} + +#if PARPORT_USE_GIVEIO == 1 +static int gw16012_get_giveio_access(void) +{ + HANDLE h; + OSVERSIONINFO version; + + version.dwOSVersionInfoSize = sizeof 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); + if (h == INVALID_HANDLE_VALUE) { + errno = ENODEV; + return -1; + } + + CloseHandle(h); + + return 0; +} +#endif + +#if PARPORT_USE_PPDEV == 1 + +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) + +#define GW16012_PPDEV_NAME "ppi" + +static int gw16012_init_ioctls(void) +{ + int temp = 0; + temp = ioctl(device_handle, PPCLAIM); + if (temp < 0) + { + LOG_ERROR("cannot claim device"); + return ERROR_JTAG_INIT_FAILED; + } + + temp = PARPORT_MODE_COMPAT; + temp = ioctl(device_handle, PPSETMODE, &temp); + if (temp < 0) + { + LOG_ERROR(" cannot set compatible mode to device"); + return ERROR_JTAG_INIT_FAILED; + } + + temp = IEEE1284_MODE_COMPAT; + temp = ioctl(device_handle, PPNEGOT, &temp); + if (temp < 0) + { + LOG_ERROR("cannot set compatible 1284 mode to device"); + return ERROR_JTAG_INIT_FAILED; + } + return ERROR_OK; +} +#else + +#define GW16012_PPDEV_NAME "parport" + +static int gw16012_init_ioctls(void) +{ + return ERROR_OK; +} + +#endif // defined(__FreeBSD__) || defined(__FreeBSD_kernel__) + +static int gw16012_init_device(void) +{ + const char *device_name = GW16012_PPDEV_NAME; + char buffer[256]; + + if (device_handle > 0) + { + LOG_ERROR("device is already opened"); + return ERROR_JTAG_INIT_FAILED; + } + + snprintf(buffer, 256, "/dev/%s%d", device_name, gw16012_port); + LOG_DEBUG("opening %s...", buffer); + + device_handle = open(buffer, O_WRONLY); + if (device_handle < 0) + { + LOG_ERROR("cannot open device. check it exists and that user read and write rights are set"); + return ERROR_JTAG_INIT_FAILED; + } + + LOG_DEBUG("...open"); + + if (gw16012_init_ioctls() != ERROR_OK) + return ERROR_JTAG_INIT_FAILED; + + return ERROR_OK; +} + +#else // PARPORT_USE_PPDEV + +static int gw16012_init_device(void) +{ + if (gw16012_port == 0) + { + gw16012_port = 0x378; + LOG_WARNING("No gw16012 port specified, using default '0x378' (LPT1)"); + } + + LOG_DEBUG("requesting privileges for parallel port 0x%lx...", (long unsigned)(gw16012_port)); +#if PARPORT_USE_GIVEIO == 1 + if (gw16012_get_giveio_access() != 0) +#else /* PARPORT_USE_GIVEIO */ + if (ioperm(gw16012_port, 3, 1) != 0) +#endif /* PARPORT_USE_GIVEIO */ + { + LOG_ERROR("missing privileges for direct i/o"); + return ERROR_JTAG_INIT_FAILED; + } + LOG_DEBUG("...privileges granted"); + + /* make sure parallel port is in right mode (clear tristate and interrupt */ +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) + outb(gw16012_port + 2, 0x0); +#else + outb(0x0, gw16012_port + 2); +#endif + return ERROR_OK; +} + +#endif // PARPORT_USE_PPDEV + +static int gw16012_init(void) +{ + uint8_t status_port; + + if (gw16012_init_device() != ERROR_OK) + return ERROR_JTAG_INIT_FAILED; + + gw16012_input(&status_port); + gw16012_msb = (status_port & 0x80) ^ 0x80; + + gw16012_speed(jtag_get_speed()); + gw16012_reset(0, 0); + + return ERROR_OK; +} + +static int gw16012_quit(void) +{ + + return ERROR_OK; +} + +COMMAND_HANDLER(gw16012_handle_parport_port_command) +{ + if (CMD_ARGC == 1) + { + /* only if the port wasn't overwritten by cmdline */ + if (gw16012_port == 0) + { + COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], gw16012_port); + } + else + { + LOG_ERROR("The parport port was already configured!"); + return ERROR_FAIL; + } + } + + command_print(CMD_CTX, "parport port = %u", gw16012_port); + + return ERROR_OK; +} + +static const struct command_registration gw16012_command_handlers[] = { + { + .name = "parport_port", + .handler = &gw16012_handle_parport_port_command, + .mode = COMMAND_CONFIG, + .help = "configure the parallel port to use", + .usage = "<port_num>", + }, + COMMAND_REGISTRATION_DONE +}; + +struct jtag_interface gw16012_interface = { + .name = "gw16012", + .commands = gw16012_command_handlers, + .init = &gw16012_init, + .quit = &gw16012_quit, + .speed = &gw16012_speed, + .execute_queue = &gw16012_execute_queue, + }; |