/* MSPDebug - debugging tool for MSP430 MCUs * Copyright (C) 2009-2012 Daniel Beer * Copyright (C) 2012 Peter Bägel * * ppdev/ppi abstraction inspired by uisp src/DARPA.C * originally written by Sergey Larin; * corrected by Denis Chertykov, Uros Platise and Marek Michalkiewicz. * * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include "jtaglib.h" #include "output.h" #if defined(__linux__) || \ ( defined(__FreeBSD__) || defined(__DragonFly__) ) /*===== includes =============================================================*/ #include #include #if defined(__linux__) #include #define par_claim(fd) ioctl(fd, PPCLAIM, NULL) #define par_write_data(fd, ptr) ioctl(fd, PPWDATA, ptr) #define par_write_control(fd, ptr) ioctl(fd, PPWCONTROL, ptr) #define par_release(fd) ioctl(fd, PPRELEASE, NULL) #define par_read_status(fd, ptr) ioctl(fd, PPRSTATUS, ptr) #elif defined(__FreeBSD__) || defined(__DragonFly__) #if defined(__FreeBSD__) #include #include #else /* __DragonFly__ */ #include #include #endif #define par_claim(fd) (0) #define par_write_data(fd, ptr) ioctl(fd, PPISDATA, ptr) #define par_write_control(fd, ptr) ioctl(fd, PPISCTRL, ptr) #define par_release(fd) (0) #define par_read_status(fd, ptr) ioctl(fd, PPIGSTATUS, ptr) #endif /* __linux__ || (__FreeBSD__ || __DragonFly__) */ #include #include "util.h" /*===== private symbols ======================================================*/ /*--- port data (out) ---*/ #define DATA0 ((unsigned char)0x01) #define DATA1 ((unsigned char)0x02) #define DATA2 ((unsigned char)0x04) #define DATA3 ((unsigned char)0x08) #define DATA4 ((unsigned char)0x10) #define DATA5 ((unsigned char)0x20) #define DATA6 ((unsigned char)0x40) #define DATA7 ((unsigned char)0x80) /*--- port status (in) ---*/ #define ERR ((unsigned char)0x08) #define SEL ((unsigned char)0x10) #define PE ((unsigned char)0x20) #define ACK ((unsigned char)0x40) #define BUSY ((unsigned char)0x80) /*--- port control (out) ---*/ #ifndef STROBE #define STROBE ((unsigned char)0x01) /* inverted by PC-hardware */ #endif #ifndef AUTOFEED #define AUTOFEED ((unsigned char)0x02) #endif #ifndef INIT #define INIT ((unsigned char)0x04) #endif #ifndef SELECTIN #define SELECTIN ((unsigned char)0x08) #endif #define IRQEN ((unsigned char)0x10) /*--- JTAG signal mapping ---*/ #define TEST INIT #define TDO PE #define TDI DATA0 #define TMS DATA1 #define TCK DATA2 #define XOUT DATA3 #define POWER (DATA4 | DATA7) #define RESET STROBE #define ENABLE (SELECTIN | AUTOFEED) #define LED_GREEN DATA5 #define LED_RED DATA6 #define TCLK TDI /*===== public functions =====================================================*/ static void do_ppwdata(struct jtdev *p) { if (par_write_data(p->port, &p->data_register) < 0) { pr_error("jtdev: par_write_data"); p->failed = 1; } } static void do_ppwcontrol(struct jtdev *p) { if (par_write_control(p->port, &p->control_register) < 0) { pr_error("jtdev: par_write_control"); p->failed = 1; } } static int jtpif_open(struct jtdev *p, const char *device) { p->port = open(device, O_RDWR); if (p->port < 0) { printc_err("jtdev: can't open %s: %s\n", device, last_error()); return -1; } if (par_claim(p->port) < 0) { printc_err("jtdev: par_claim: %s: %s\n", device, last_error()); close(p->port); return -1; } p->data_register = 0; p->control_register = 0; p->failed = 0; do_ppwdata(p); do_ppwcontrol(p); return 0; } static void jtpif_close(struct jtdev *p) { if (par_release(p->port) < 0) pr_error("warning: jtdev: failed to release port"); close(p->port); } static void jtpif_power_on(struct jtdev *p) { /* power supply on */ p->data_register |= POWER; do_ppwdata(p); } static void jtpif_power_off(struct jtdev *p) { /* power supply off */ p->data_register &= ~POWER; do_ppwdata(p); /* a high, inactive reset also powers the target */ /* reset pin is inverted by PC hardware */ p->control_register |= RESET; do_ppwcontrol(p); } static void jtpif_connect(struct jtdev *p) { p->control_register |= (TEST | ENABLE); do_ppwcontrol(p); } static void jtpif_release(struct jtdev *p) { p->control_register &= ~(TEST | ENABLE); do_ppwcontrol(p); } static void jtpif_tck(struct jtdev *p, int out) { if (out) p->data_register |= TCK; else p->data_register &= ~TCK; do_ppwdata(p); } static void jtpif_tms(struct jtdev *p, int out) { if (out) p->data_register |= TMS; else p->data_register &= ~TMS; do_ppwdata(p); } static void jtpif_tdi(struct jtdev *p, int out) { if (out) p->data_register |= TDI; else p->data_register &= ~TDI; do_ppwdata(p); } static void jtpif_rst(struct jtdev *p, int out) { /* reset pin is inverted by PC hardware */ if (out) p->control_register &= ~RESET; else p->control_register |= RESET; do_ppwcontrol(p); } static void jtpif_tst(struct jtdev *p, int out) { if (out) p->control_register |= TEST; else p->control_register &= ~TEST; do_ppwcontrol(p); } static int jtpif_tdo_get(struct jtdev *p) { uint8_t input; if (par_read_status(p->port, &input) < 0) { pr_error("jtdev: par_read_status:"); p->failed = 1; return 0; } return (input & TDO) ? 1 : 0; } static void jtpif_tclk(struct jtdev *p, int out) { if (out) p->data_register |= TCLK; else p->data_register &= ~TCLK; do_ppwdata(p); } static int jtpif_tclk_get(struct jtdev *p) { return (p->data_register & TCLK) ? 1 : 0; } static void jtpif_tclk_strobe(struct jtdev *p, unsigned int count) { int i; for (i = 0; i < count; i++) { jtpif_tclk(p, 1); jtpif_tclk(p, 0); if (p->failed) return; } } static void jtpif_led_green(struct jtdev *p, int out) { if (out) p->data_register |= LED_GREEN; else p->data_register &= ~LED_GREEN; do_ppwdata(p); } static void jtpif_led_red(struct jtdev *p, int out) { if (out) p->data_register |= LED_RED; else p->data_register &= ~LED_RED; do_ppwdata(p); } #else /* __linux__ */ static int jtpif_open(struct jtdev *p, const char *device) { printc_err("jtdev: driver is not supported on this platform\n"); p->failed = 1; return -1; } static void jtpif_close(struct jtdev *p) { } static void jtpif_power_on(struct jtdev *p) { } static void jtpif_power_off(struct jtdev *p) { } static void jtpif_connect(struct jtdev *p) { } static void jtpif_release(struct jtdev *p) { } static void jtpif_tck(struct jtdev *p, int out) { } static void jtpif_tms(struct jtdev *p, int out) { } static void jtpif_tdi(struct jtdev *p, int out) { } static void jtpif_rst(struct jtdev *p, int out) { } static void jtpif_tst(struct jtdev *p, int out) { } static int jtpif_tdo_get(struct jtdev *p) { return 0; } static void jtpif_tclk(struct jtdev *p, int out) { } static int jtpif_tclk_get(struct jtdev *p) { return 0; } static void jtpif_tclk_strobe(struct jtdev *p, unsigned int count) { } static void jtpif_led_green(struct jtdev *p, int out) { } static void jtpif_led_red(struct jtdev *p, int out) { } #endif const struct jtdev_func jtdev_func_pif = { .jtdev_open = jtpif_open, .jtdev_close = jtpif_close, .jtdev_power_on = jtpif_power_on, .jtdev_power_off = jtpif_power_off, .jtdev_connect = jtpif_connect, .jtdev_release = jtpif_release, .jtdev_tck = jtpif_tck, .jtdev_tms = jtpif_tms, .jtdev_tdi = jtpif_tdi, .jtdev_rst = jtpif_rst, .jtdev_tst = jtpif_tst, .jtdev_tdo_get = jtpif_tdo_get, .jtdev_tclk = jtpif_tclk, .jtdev_tclk_get = jtpif_tclk_get, .jtdev_tclk_strobe = jtpif_tclk_strobe, .jtdev_led_green = jtpif_led_green, .jtdev_led_red = jtpif_led_red, .jtdev_ir_shift = jtag_default_ir_shift, .jtdev_dr_shift_8 = jtag_default_dr_shift_8, .jtdev_dr_shift_16 = jtag_default_dr_shift_16, .jtdev_dr_shift_20 = jtag_default_dr_shift_20, .jtdev_tms_sequence= jtag_default_tms_sequence, .jtdev_init_dap = jtag_default_init_dap };