/* * (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 <common.h> #include <serial.h> #include <stdio_dev.h> #include <post.h> #include <linux/compiler.h> DECLARE_GLOBAL_DATA_PTR; static struct serial_device *serial_devices = NULL; static struct serial_device *serial_current = NULL; void serial_register(struct serial_device *dev) { #ifdef CONFIG_NEEDS_MANUAL_RELOC dev->init += 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) { #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2) serial_register (&serial_smc_device); #endif #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) \ || defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4) serial_register (&serial_scc_device); #endif #if defined(CONFIG_SYS_NS16550_SERIAL) #if defined(CONFIG_SYS_NS16550_COM1) serial_register(&eserial1_device); #endif #if defined(CONFIG_SYS_NS16550_COM2) serial_register(&eserial2_device); #endif #if defined(CONFIG_SYS_NS16550_COM3) serial_register(&eserial3_device); #endif #if defined(CONFIG_SYS_NS16550_COM4) serial_register(&eserial4_device); #endif #endif /* CONFIG_SYS_NS16550_SERIAL */ #if defined (CONFIG_FFUART) serial_register(&serial_ffuart_device); #endif #if defined (CONFIG_BTUART) serial_register(&serial_btuart_device); #endif #if defined (CONFIG_STUART) serial_register(&serial_stuart_device); #endif #if defined(CONFIG_S3C2410) serial_register(&s3c24xx_serial0_device); serial_register(&s3c24xx_serial1_device); serial_register(&s3c24xx_serial2_device); #endif #if defined(CONFIG_S5P) serial_register(&s5p_serial0_device); serial_register(&s5p_serial1_device); serial_register(&s5p_serial2_device); serial_register(&s5p_serial3_device); #endif #if defined(CONFIG_MPC512X) #if defined(CONFIG_SYS_PSC1) serial_register(&serial1_device); #endif #if defined(CONFIG_SYS_PSC3) serial_register(&serial3_device); #endif #if defined(CONFIG_SYS_PSC4) serial_register(&serial4_device); #endif #if defined(CONFIG_SYS_PSC6) serial_register(&serial6_device); #endif #endif #if defined(CONFIG_SYS_BFIN_UART) serial_register_bfin_uart(); #endif #if defined(CONFIG_XILINX_UARTLITE) # ifdef XILINX_UARTLITE_BASEADDR serial_register(&uartlite_serial0_device); # endif /* XILINX_UARTLITE_BASEADDR */ # ifdef XILINX_UARTLITE_BASEADDR1 serial_register(&uartlite_serial1_device); # endif /* XILINX_UARTLITE_BASEADDR1 */ # ifdef XILINX_UARTLITE_BASEADDR2 serial_register(&uartlite_serial2_device); # endif /* XILINX_UARTLITE_BASEADDR2 */ # ifdef XILINX_UARTLITE_BASEADDR3 serial_register(&uartlite_serial3_device); # endif /* XILINX_UARTLITE_BASEADDR3 */ #endif /* CONFIG_XILINX_UARTLITE */ 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->init; dev.stop = s->uninit; 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 (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->init (); } } 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()->init(); } 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_uninit() !? */ if (s->uninit) s->uninit(); } done: /* Restore previous serial state */ serial_current = saved_dev; bd->bi_baudrate = saved_baud; serial_reinit_all(); serial_setbrg(); return ret; } #endif