Mark A. Greer | 0c176fa | 2006-10-16 13:52:09 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Generic serial console support |
| 3 | * |
| 4 | * Author: Mark A. Greer <mgreer@mvista.com> |
| 5 | * |
| 6 | * Code in serial_edit_cmdline() copied from <file:arch/ppc/boot/simple/misc.c> |
| 7 | * and was written by Matt Porter <mporter@kernel.crashing.org>. |
| 8 | * |
| 9 | * 2001,2006 (c) MontaVista Software, Inc. This file is licensed under |
| 10 | * the terms of the GNU General Public License version 2. This program |
| 11 | * is licensed "as is" without any warranty of any kind, whether express |
| 12 | * or implied. |
| 13 | */ |
| 14 | #include <stdarg.h> |
| 15 | #include <stddef.h> |
| 16 | #include "types.h" |
| 17 | #include "string.h" |
| 18 | #include "stdio.h" |
| 19 | #include "io.h" |
| 20 | #include "ops.h" |
| 21 | |
Mark A. Greer | 0c176fa | 2006-10-16 13:52:09 -0700 | [diff] [blame] | 22 | static int serial_open(void) |
| 23 | { |
| 24 | struct serial_console_data *scdp = console_ops.data; |
| 25 | return scdp->open(); |
| 26 | } |
| 27 | |
Geoff Levand | b96fbb6 | 2007-06-16 08:06:40 +1000 | [diff] [blame] | 28 | static void serial_write(const char *buf, int len) |
Mark A. Greer | 0c176fa | 2006-10-16 13:52:09 -0700 | [diff] [blame] | 29 | { |
| 30 | struct serial_console_data *scdp = console_ops.data; |
| 31 | |
| 32 | while (*buf != '\0') |
| 33 | scdp->putc(*buf++); |
| 34 | } |
| 35 | |
| 36 | static void serial_edit_cmdline(char *buf, int len) |
| 37 | { |
| 38 | int timer = 0, count; |
| 39 | char ch, *cp; |
| 40 | struct serial_console_data *scdp = console_ops.data; |
| 41 | |
| 42 | cp = buf; |
| 43 | count = strlen(buf); |
| 44 | cp = &buf[count]; |
| 45 | count++; |
| 46 | |
| 47 | while (timer++ < 5*1000) { |
| 48 | if (scdp->tstc()) { |
| 49 | while (((ch = scdp->getc()) != '\n') && (ch != '\r')) { |
| 50 | /* Test for backspace/delete */ |
| 51 | if ((ch == '\b') || (ch == '\177')) { |
| 52 | if (cp != buf) { |
| 53 | cp--; |
| 54 | count--; |
| 55 | printf("\b \b"); |
| 56 | } |
| 57 | /* Test for ^x/^u (and wipe the line) */ |
| 58 | } else if ((ch == '\030') || (ch == '\025')) { |
| 59 | while (cp != buf) { |
| 60 | cp--; |
| 61 | count--; |
| 62 | printf("\b \b"); |
| 63 | } |
| 64 | } else if (count < len) { |
| 65 | *cp++ = ch; |
| 66 | count++; |
| 67 | scdp->putc(ch); |
| 68 | } |
| 69 | } |
| 70 | break; /* Exit 'timer' loop */ |
| 71 | } |
| 72 | udelay(1000); /* 1 msec */ |
| 73 | } |
| 74 | *cp = 0; |
| 75 | } |
| 76 | |
| 77 | static void serial_close(void) |
| 78 | { |
| 79 | struct serial_console_data *scdp = console_ops.data; |
| 80 | |
| 81 | if (scdp->close) |
| 82 | scdp->close(); |
| 83 | } |
| 84 | |
| 85 | static void *serial_get_stdout_devp(void) |
| 86 | { |
| 87 | void *devp; |
| 88 | char devtype[MAX_PROP_LEN]; |
| 89 | char path[MAX_PATH_LEN]; |
| 90 | |
| 91 | devp = finddevice("/chosen"); |
| 92 | if (devp == NULL) |
| 93 | goto err_out; |
| 94 | |
| 95 | if (getprop(devp, "linux,stdout-path", path, MAX_PATH_LEN) > 0) { |
| 96 | devp = finddevice(path); |
| 97 | if (devp == NULL) |
| 98 | goto err_out; |
| 99 | |
| 100 | if ((getprop(devp, "device_type", devtype, sizeof(devtype)) > 0) |
| 101 | && !strcmp(devtype, "serial")) |
| 102 | return devp; |
| 103 | } |
| 104 | err_out: |
| 105 | return NULL; |
| 106 | } |
| 107 | |
| 108 | static struct serial_console_data serial_cd; |
| 109 | |
| 110 | /* Node's "compatible" property determines which serial driver to use */ |
| 111 | int serial_console_init(void) |
| 112 | { |
| 113 | void *devp; |
| 114 | int rc = -1; |
Mark A. Greer | 0c176fa | 2006-10-16 13:52:09 -0700 | [diff] [blame] | 115 | |
| 116 | devp = serial_get_stdout_devp(); |
| 117 | if (devp == NULL) |
| 118 | goto err_out; |
| 119 | |
Scott Wood | dc4f397 | 2007-08-21 03:39:54 +1000 | [diff] [blame] | 120 | if (dt_is_compatible(devp, "ns16550")) |
Mark A. Greer | 0c176fa | 2006-10-16 13:52:09 -0700 | [diff] [blame] | 121 | rc = ns16550_console_init(devp, &serial_cd); |
Scott Wood | dc4f397 | 2007-08-21 03:39:54 +1000 | [diff] [blame] | 122 | else if (dt_is_compatible(devp, "marvell,mpsc")) |
Mark A. Greer | e12deb8 | 2007-05-12 10:54:31 +1000 | [diff] [blame] | 123 | rc = mpsc_console_init(devp, &serial_cd); |
Scott Wood | d0f53fa | 2007-08-21 03:39:57 +1000 | [diff] [blame] | 124 | else if (dt_is_compatible(devp, "fsl,cpm1-scc-uart") || |
| 125 | dt_is_compatible(devp, "fsl,cpm1-smc-uart") || |
| 126 | dt_is_compatible(devp, "fsl,cpm2-scc-uart") || |
| 127 | dt_is_compatible(devp, "fsl,cpm2-smc-uart")) |
| 128 | rc = cpm_console_init(devp, &serial_cd); |
Grant Likely | 85498ae | 2007-09-01 03:34:37 +1000 | [diff] [blame^] | 129 | else if (dt_is_compatible(devp, "mpc5200-psc-uart")) |
| 130 | rc = mpc5200_psc_console_init(devp, &serial_cd); |
Mark A. Greer | 0c176fa | 2006-10-16 13:52:09 -0700 | [diff] [blame] | 131 | |
| 132 | /* Add other serial console driver calls here */ |
| 133 | |
| 134 | if (!rc) { |
| 135 | console_ops.open = serial_open; |
| 136 | console_ops.write = serial_write; |
Mark A. Greer | 0c176fa | 2006-10-16 13:52:09 -0700 | [diff] [blame] | 137 | console_ops.close = serial_close; |
| 138 | console_ops.data = &serial_cd; |
| 139 | |
Scott Wood | dc4f397 | 2007-08-21 03:39:54 +1000 | [diff] [blame] | 140 | if (serial_cd.getc) |
| 141 | console_ops.edit_cmdline = serial_edit_cmdline; |
| 142 | |
Mark A. Greer | 0c176fa | 2006-10-16 13:52:09 -0700 | [diff] [blame] | 143 | return 0; |
| 144 | } |
| 145 | err_out: |
| 146 | return -1; |
| 147 | } |