306 lines
6.7 KiB
C
306 lines
6.7 KiB
C
/*
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* (C) Copyright 2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <serial.h>
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#include <stdio_dev.h>
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#include <post.h>
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#include <linux/compiler.h>
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DECLARE_GLOBAL_DATA_PTR;
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static struct serial_device *serial_devices;
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static struct serial_device *serial_current;
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void serial_register(struct serial_device *dev)
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{
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#ifdef CONFIG_NEEDS_MANUAL_RELOC
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dev->init += gd->reloc_off;
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dev->setbrg += gd->reloc_off;
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dev->getc += gd->reloc_off;
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dev->tstc += gd->reloc_off;
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dev->putc += gd->reloc_off;
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dev->puts += gd->reloc_off;
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#endif
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dev->next = serial_devices;
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serial_devices = dev;
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}
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void serial_initialize(void)
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{
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#if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)
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serial_register(&serial_smc_device);
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#endif
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#if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) || \
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defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
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serial_register(&serial_scc_device);
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#endif
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#if defined(CONFIG_SYS_NS16550_SERIAL)
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#if defined(CONFIG_SYS_NS16550_COM1)
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serial_register(&eserial1_device);
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#endif
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#if defined(CONFIG_SYS_NS16550_COM2)
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serial_register(&eserial2_device);
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#endif
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#if defined(CONFIG_SYS_NS16550_COM3)
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serial_register(&eserial3_device);
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#endif
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#if defined(CONFIG_SYS_NS16550_COM4)
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serial_register(&eserial4_device);
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#endif
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#endif /* CONFIG_SYS_NS16550_SERIAL */
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#if defined(CONFIG_FFUART)
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serial_register(&serial_ffuart_device);
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#endif
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#if defined(CONFIG_BTUART)
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serial_register(&serial_btuart_device);
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#endif
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#if defined(CONFIG_STUART)
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serial_register(&serial_stuart_device);
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#endif
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#if defined(CONFIG_S3C2410)
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serial_register(&s3c24xx_serial0_device);
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serial_register(&s3c24xx_serial1_device);
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serial_register(&s3c24xx_serial2_device);
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#endif
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#if defined(CONFIG_S5P)
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serial_register(&s5p_serial0_device);
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serial_register(&s5p_serial1_device);
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serial_register(&s5p_serial2_device);
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serial_register(&s5p_serial3_device);
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#endif
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#if defined(CONFIG_MPC512X)
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#if defined(CONFIG_SYS_PSC1)
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serial_register(&serial1_device);
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#endif
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#if defined(CONFIG_SYS_PSC3)
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serial_register(&serial3_device);
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#endif
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#if defined(CONFIG_SYS_PSC4)
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serial_register(&serial4_device);
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#endif
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#if defined(CONFIG_SYS_PSC6)
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serial_register(&serial6_device);
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#endif
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#endif
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#if defined(CONFIG_SYS_BFIN_UART)
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serial_register_bfin_uart();
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#endif
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#if defined(CONFIG_XILINX_UARTLITE)
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# ifdef XILINX_UARTLITE_BASEADDR
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serial_register(&uartlite_serial0_device);
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# endif /* XILINX_UARTLITE_BASEADDR */
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# ifdef XILINX_UARTLITE_BASEADDR1
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serial_register(&uartlite_serial1_device);
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# endif /* XILINX_UARTLITE_BASEADDR1 */
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# ifdef XILINX_UARTLITE_BASEADDR2
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serial_register(&uartlite_serial2_device);
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# endif /* XILINX_UARTLITE_BASEADDR2 */
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# ifdef XILINX_UARTLITE_BASEADDR3
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serial_register(&uartlite_serial3_device);
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# endif /* XILINX_UARTLITE_BASEADDR3 */
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#endif /* CONFIG_XILINX_UARTLITE */
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serial_assign(default_serial_console()->name);
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}
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void serial_stdio_init(void)
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{
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struct stdio_dev dev;
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struct serial_device *s = serial_devices;
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while (s) {
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memset(&dev, 0, sizeof(dev));
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strcpy(dev.name, s->name);
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dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
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dev.start = s->init;
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dev.stop = s->uninit;
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dev.putc = s->putc;
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dev.puts = s->puts;
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dev.getc = s->getc;
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dev.tstc = s->tstc;
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stdio_register(&dev);
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s = s->next;
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}
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}
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int serial_assign(const char *name)
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{
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struct serial_device *s;
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for (s = serial_devices; s; s = s->next) {
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if (strcmp(s->name, name) == 0) {
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serial_current = s;
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return 0;
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}
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}
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return 1;
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}
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void serial_reinit_all(void)
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{
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struct serial_device *s;
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for (s = serial_devices; s; s = s->next)
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s->init();
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}
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static struct serial_device *get_current(void)
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{
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struct serial_device *dev;
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if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
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dev = default_serial_console();
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/* We must have a console device */
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if (!dev)
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panic("Cannot find console");
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} else
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dev = serial_current;
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return dev;
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}
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int serial_init(void)
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{
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return get_current()->init();
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}
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void serial_setbrg(void)
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{
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get_current()->setbrg();
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}
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int serial_getc(void)
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{
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return get_current()->getc();
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}
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int serial_tstc(void)
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{
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return get_current()->tstc();
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}
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void serial_putc(const char c)
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{
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get_current()->putc(c);
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}
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void serial_puts(const char *s)
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{
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get_current()->puts(s);
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}
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#if CONFIG_POST & CONFIG_SYS_POST_UART
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static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
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/* Mark weak until post/cpu/.../uart.c migrate over */
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__weak
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int uart_post_test(int flags)
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{
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unsigned char c;
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int ret, saved_baud, b;
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struct serial_device *saved_dev, *s;
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bd_t *bd = gd->bd;
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/* Save current serial state */
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ret = 0;
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saved_dev = serial_current;
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saved_baud = bd->bi_baudrate;
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for (s = serial_devices; s; s = s->next) {
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/* If this driver doesn't support loop back, skip it */
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if (!s->loop)
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continue;
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/* Test the next device */
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serial_current = s;
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ret = serial_init();
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if (ret)
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goto done;
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/* Consume anything that happens to be queued */
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while (serial_tstc())
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serial_getc();
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/* Enable loop back */
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s->loop(1);
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/* Test every available baud rate */
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for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
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bd->bi_baudrate = bauds[b];
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serial_setbrg();
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/*
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* Stick to printable chars to avoid issues:
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* - terminal corruption
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* - serial program reacting to sequences and sending
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* back random extra data
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* - most serial drivers add in extra chars (like \r\n)
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*/
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for (c = 0x20; c < 0x7f; ++c) {
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/* Send it out */
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serial_putc(c);
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/* Make sure it's the same one */
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ret = (c != serial_getc());
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if (ret) {
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s->loop(0);
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goto done;
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}
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/* Clean up the output in case it was sent */
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serial_putc('\b');
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ret = ('\b' != serial_getc());
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if (ret) {
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s->loop(0);
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goto done;
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}
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}
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}
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/* Disable loop back */
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s->loop(0);
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/* XXX: There is no serial_uninit() !? */
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if (s->uninit)
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s->uninit();
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}
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done:
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/* Restore previous serial state */
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serial_current = saved_dev;
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bd->bi_baudrate = saved_baud;
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serial_reinit_all();
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serial_setbrg();
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return ret;
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}
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#endif
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