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155 lines
3.6 KiB
155 lines
3.6 KiB
/* |
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* Generic serial console support |
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* |
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* Author: Mark A. Greer <[email protected]> |
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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 <[email protected]>. |
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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, unsigned int timeout) |
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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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do { |
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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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} while (timer++ < timeout); |
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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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getprop(devp, "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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#ifdef CONFIG_CPM |
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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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#endif |
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#ifdef CONFIG_PPC_MPC52xx |
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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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#endif |
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#ifdef CONFIG_PPC64_BOOT_WRAPPER |
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else if (dt_is_compatible(devp, "ibm,opal-console-raw")) |
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rc = opal_console_init(devp, &serial_cd); |
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#endif |
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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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