~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/powerpc/boot/serial.c

Version: ~ [ linux-5.6 ] ~ [ linux-5.5.13 ] ~ [ linux-5.4.28 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.113 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.174 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.217 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.217 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.82 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 
 22 static int serial_open(void)
 23 {
 24         struct serial_console_data *scdp = console_ops.data;
 25         return scdp->open();
 26 }
 27 
 28 static void serial_write(const char *buf, int len)
 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, unsigned int timeout)
 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         do {
 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         } while (timer++ < timeout);
 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;
115 
116         devp = serial_get_stdout_devp();
117         if (devp == NULL)
118                 goto err_out;
119 
120         if (dt_is_compatible(devp, "ns16550") ||
121             dt_is_compatible(devp, "pnpPNP,501"))
122                 rc = ns16550_console_init(devp, &serial_cd);
123 #ifdef CONFIG_EMBEDDED6xx
124         else if (dt_is_compatible(devp, "marvell,mv64360-mpsc"))
125                 rc = mpsc_console_init(devp, &serial_cd);
126 #endif
127 #ifdef CONFIG_CPM
128         else if (dt_is_compatible(devp, "fsl,cpm1-scc-uart") ||
129                  dt_is_compatible(devp, "fsl,cpm1-smc-uart") ||
130                  dt_is_compatible(devp, "fsl,cpm2-scc-uart") ||
131                  dt_is_compatible(devp, "fsl,cpm2-smc-uart"))
132                 rc = cpm_console_init(devp, &serial_cd);
133 #endif
134 #ifdef CONFIG_PPC_MPC52XX
135         else if (dt_is_compatible(devp, "fsl,mpc5200-psc-uart"))
136                 rc = mpc5200_psc_console_init(devp, &serial_cd);
137 #endif
138 #ifdef CONFIG_XILINX_VIRTEX
139         else if (dt_is_compatible(devp, "xlnx,opb-uartlite-1.00.b") ||
140                  dt_is_compatible(devp, "xlnx,xps-uartlite-1.00.a"))
141                 rc = uartlite_console_init(devp, &serial_cd);
142 #endif
143 #ifdef CONFIG_PPC64_BOOT_WRAPPER
144         else if (dt_is_compatible(devp, "ibm,opal-console-raw"))
145                 rc = opal_console_init(devp, &serial_cd);
146 #endif
147 
148         /* Add other serial console driver calls here */
149 
150         if (!rc) {
151                 console_ops.open = serial_open;
152                 console_ops.write = serial_write;
153                 console_ops.close = serial_close;
154                 console_ops.data = &serial_cd;
155 
156                 if (serial_cd.getc)
157                         console_ops.edit_cmdline = serial_edit_cmdline;
158 
159                 return 0;
160         }
161 err_out:
162         return -1;
163 }
164 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp