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https://github.com/torvalds/linux
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8f23735d8f
This adds the bootwrapper for the cuImage target and a compatible property check for "pnpPNP,501" to the generic serial console support code. The default link address for the cuImage target is set to 0x800000. This allows to boot the kernel with AmigaOS4's second level bootloader, which always loads a uImage at 0x500000. Signed-off-by: Gerhard Pircher <gerhard_pircher@gmx.net> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/*
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* Generic serial console support
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*
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* Author: Mark A. Greer <mgreer@mvista.com>
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*
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* Code in serial_edit_cmdline() copied from <file:arch/ppc/boot/simple/misc.c>
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* and was written by Matt Porter <mporter@kernel.crashing.org>.
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*
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* 2001,2006 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include "types.h"
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#include "string.h"
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#include "stdio.h"
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#include "io.h"
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#include "ops.h"
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static int serial_open(void)
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{
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struct serial_console_data *scdp = console_ops.data;
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return scdp->open();
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}
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static void serial_write(const char *buf, int len)
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{
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struct serial_console_data *scdp = console_ops.data;
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while (*buf != '\0')
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scdp->putc(*buf++);
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}
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static void serial_edit_cmdline(char *buf, int len)
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{
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int timer = 0, count;
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char ch, *cp;
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struct serial_console_data *scdp = console_ops.data;
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cp = buf;
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count = strlen(buf);
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cp = &buf[count];
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count++;
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while (timer++ < 5*1000) {
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if (scdp->tstc()) {
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while (((ch = scdp->getc()) != '\n') && (ch != '\r')) {
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/* Test for backspace/delete */
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if ((ch == '\b') || (ch == '\177')) {
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if (cp != buf) {
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cp--;
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count--;
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printf("\b \b");
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}
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/* Test for ^x/^u (and wipe the line) */
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} else if ((ch == '\030') || (ch == '\025')) {
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while (cp != buf) {
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cp--;
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count--;
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printf("\b \b");
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}
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} else if (count < len) {
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*cp++ = ch;
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count++;
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scdp->putc(ch);
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}
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}
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break; /* Exit 'timer' loop */
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}
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udelay(1000); /* 1 msec */
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}
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*cp = 0;
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}
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static void serial_close(void)
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{
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struct serial_console_data *scdp = console_ops.data;
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if (scdp->close)
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scdp->close();
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}
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static void *serial_get_stdout_devp(void)
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{
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void *devp;
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char devtype[MAX_PROP_LEN];
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char path[MAX_PATH_LEN];
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devp = finddevice("/chosen");
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if (devp == NULL)
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goto err_out;
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if (getprop(devp, "linux,stdout-path", path, MAX_PATH_LEN) > 0) {
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devp = finddevice(path);
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if (devp == NULL)
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goto err_out;
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if ((getprop(devp, "device_type", devtype, sizeof(devtype)) > 0)
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&& !strcmp(devtype, "serial"))
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return devp;
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}
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err_out:
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return NULL;
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}
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static struct serial_console_data serial_cd;
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/* Node's "compatible" property determines which serial driver to use */
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int serial_console_init(void)
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{
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void *devp;
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int rc = -1;
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devp = serial_get_stdout_devp();
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if (devp == NULL)
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goto err_out;
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if (dt_is_compatible(devp, "ns16550") ||
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dt_is_compatible(devp, "pnpPNP,501"))
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rc = ns16550_console_init(devp, &serial_cd);
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else if (dt_is_compatible(devp, "marvell,mv64360-mpsc"))
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rc = mpsc_console_init(devp, &serial_cd);
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else if (dt_is_compatible(devp, "fsl,cpm1-scc-uart") ||
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dt_is_compatible(devp, "fsl,cpm1-smc-uart") ||
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dt_is_compatible(devp, "fsl,cpm2-scc-uart") ||
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dt_is_compatible(devp, "fsl,cpm2-smc-uart"))
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rc = cpm_console_init(devp, &serial_cd);
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else if (dt_is_compatible(devp, "fsl,mpc5200-psc-uart"))
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rc = mpc5200_psc_console_init(devp, &serial_cd);
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else if (dt_is_compatible(devp, "xlnx,opb-uartlite-1.00.b") ||
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dt_is_compatible(devp, "xlnx,xps-uartlite-1.00.a"))
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rc = uartlite_console_init(devp, &serial_cd);
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/* Add other serial console driver calls here */
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if (!rc) {
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console_ops.open = serial_open;
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console_ops.write = serial_write;
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console_ops.close = serial_close;
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console_ops.data = &serial_cd;
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if (serial_cd.getc)
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console_ops.edit_cmdline = serial_edit_cmdline;
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return 0;
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}
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err_out:
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return -1;
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}
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