/* * (C) Copyright 2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * 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 */ #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; static struct serial_device *serial_devices; static struct serial_device *serial_current; static void serial_null(void) { } #define serial_initfunc(name) \ void name(void) \ __attribute__((weak, alias("serial_null"))); serial_initfunc(mpc8xx_serial_initialize); serial_initfunc(ns16550_serial_initialize); serial_initfunc(pxa_serial_initialize); serial_initfunc(s3c24xx_serial_initialize); serial_initfunc(s5p_serial_initialize); serial_initfunc(zynq_serial_initalize); serial_initfunc(bfin_serial_initialize); serial_initfunc(bfin_jtag_initialize); serial_initfunc(mpc512x_serial_initialize); serial_initfunc(uartlite_serial_initialize); serial_initfunc(au1x00_serial_initialize); serial_initfunc(asc_serial_initialize); serial_initfunc(jz_serial_initialize); serial_initfunc(mpc5xx_serial_initialize); serial_initfunc(mpc8220_serial_initialize); serial_initfunc(mpc8260_scc_serial_initialize); serial_initfunc(mpc8260_smc_serial_initialize); serial_initfunc(mpc85xx_serial_initialize); serial_initfunc(iop480_serial_initialize); void serial_register(struct serial_device *dev) { #ifdef CONFIG_NEEDS_MANUAL_RELOC dev->start += gd->reloc_off; dev->setbrg += gd->reloc_off; dev->getc += gd->reloc_off; dev->tstc += gd->reloc_off; dev->putc += gd->reloc_off; dev->puts += gd->reloc_off; #endif dev->next = serial_devices; serial_devices = dev; } void serial_initialize(void) { mpc8xx_serial_initialize(); ns16550_serial_initialize(); pxa_serial_initialize(); s3c24xx_serial_initialize(); s5p_serial_initialize(); mpc512x_serial_initialize(); bfin_serial_initialize(); bfin_jtag_initialize(); uartlite_serial_initialize(); zynq_serial_initalize(); au1x00_serial_initialize(); asc_serial_initialize(); jz_serial_initialize(); mpc5xx_serial_initialize(); mpc8220_serial_initialize(); mpc8260_scc_serial_initialize(); mpc8260_smc_serial_initialize(); mpc85xx_serial_initialize(); iop480_serial_initialize(); serial_assign(default_serial_console()->name); } void serial_stdio_init(void) { struct stdio_dev dev; struct serial_device *s = serial_devices; while (s) { memset(&dev, 0, sizeof(dev)); strcpy(dev.name, s->name); dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT; dev.start = s->start; dev.stop = s->stop; dev.putc = s->putc; dev.puts = s->puts; dev.getc = s->getc; dev.tstc = s->tstc; stdio_register(&dev); s = s->next; } } int serial_assign(const char *name) { struct serial_device *s; for (s = serial_devices; s; s = s->next) { if (strcmp(s->name, name) == 0) { serial_current = s; return 0; } } return 1; } void serial_reinit_all(void) { struct serial_device *s; for (s = serial_devices; s; s = s->next) s->start(); } static struct serial_device *get_current(void) { struct serial_device *dev; if (!(gd->flags & GD_FLG_RELOC) || !serial_current) { dev = default_serial_console(); /* We must have a console device */ if (!dev) panic("Cannot find console"); } else dev = serial_current; return dev; } int serial_init(void) { return get_current()->start(); } void serial_setbrg(void) { get_current()->setbrg(); } int serial_getc(void) { return get_current()->getc(); } int serial_tstc(void) { return get_current()->tstc(); } void serial_putc(const char c) { get_current()->putc(c); } void serial_puts(const char *s) { get_current()->puts(s); } #if CONFIG_POST & CONFIG_SYS_POST_UART static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; /* Mark weak until post/cpu/.../uart.c migrate over */ __weak int uart_post_test(int flags) { unsigned char c; int ret, saved_baud, b; struct serial_device *saved_dev, *s; bd_t *bd = gd->bd; /* Save current serial state */ ret = 0; saved_dev = serial_current; saved_baud = bd->bi_baudrate; for (s = serial_devices; s; s = s->next) { /* If this driver doesn't support loop back, skip it */ if (!s->loop) continue; /* Test the next device */ serial_current = s; ret = serial_init(); if (ret) goto done; /* Consume anything that happens to be queued */ while (serial_tstc()) serial_getc(); /* Enable loop back */ s->loop(1); /* Test every available baud rate */ for (b = 0; b < ARRAY_SIZE(bauds); ++b) { bd->bi_baudrate = bauds[b]; serial_setbrg(); /* * Stick to printable chars to avoid issues: * - terminal corruption * - serial program reacting to sequences and sending * back random extra data * - most serial drivers add in extra chars (like \r\n) */ for (c = 0x20; c < 0x7f; ++c) { /* Send it out */ serial_putc(c); /* Make sure it's the same one */ ret = (c != serial_getc()); if (ret) { s->loop(0); goto done; } /* Clean up the output in case it was sent */ serial_putc('\b'); ret = ('\b' != serial_getc()); if (ret) { s->loop(0); goto done; } } } /* Disable loop back */ s->loop(0); /* XXX: There is no serial_stop() !? */ if (s->stop) s->stop(); } done: /* Restore previous serial state */ serial_current = saved_dev; bd->bi_baudrate = saved_baud; serial_reinit_all(); serial_setbrg(); return ret; } #endif