10c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer/* 20c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * Generic serial console support 30c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * 40c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * Author: Mark A. Greer <mgreer@mvista.com> 50c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * 60c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * Code in serial_edit_cmdline() copied from <file:arch/ppc/boot/simple/misc.c> 70c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * and was written by Matt Porter <mporter@kernel.crashing.org>. 80c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * 90c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * 2001,2006 (c) MontaVista Software, Inc. This file is licensed under 100c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * the terms of the GNU General Public License version 2. This program 110c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * is licensed "as is" without any warranty of any kind, whether express 120c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer * or implied. 130c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer */ 140c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer#include <stdarg.h> 150c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer#include <stddef.h> 160c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer#include "types.h" 170c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer#include "string.h" 180c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer#include "stdio.h" 190c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer#include "io.h" 200c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer#include "ops.h" 210c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 220c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greerstatic int serial_open(void) 230c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer{ 240c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer struct serial_console_data *scdp = console_ops.data; 250c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer return scdp->open(); 260c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer} 270c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 28b96fbb6e1eb81bb21a8c3462773a0056e12de427Geoff Levandstatic void serial_write(const char *buf, int len) 290c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer{ 300c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer struct serial_console_data *scdp = console_ops.data; 310c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 320c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer while (*buf != '\0') 330c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer scdp->putc(*buf++); 340c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer} 350c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 360c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greerstatic void serial_edit_cmdline(char *buf, int len) 370c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer{ 380c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer int timer = 0, count; 390c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer char ch, *cp; 400c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer struct serial_console_data *scdp = console_ops.data; 410c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 420c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer cp = buf; 430c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer count = strlen(buf); 440c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer cp = &buf[count]; 450c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer count++; 460c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 470c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer while (timer++ < 5*1000) { 480c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if (scdp->tstc()) { 490c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer while (((ch = scdp->getc()) != '\n') && (ch != '\r')) { 500c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer /* Test for backspace/delete */ 510c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if ((ch == '\b') || (ch == '\177')) { 520c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if (cp != buf) { 530c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer cp--; 540c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer count--; 550c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer printf("\b \b"); 560c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } 570c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer /* Test for ^x/^u (and wipe the line) */ 580c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } else if ((ch == '\030') || (ch == '\025')) { 590c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer while (cp != buf) { 600c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer cp--; 610c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer count--; 620c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer printf("\b \b"); 630c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } 640c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } else if (count < len) { 650c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer *cp++ = ch; 660c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer count++; 670c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer scdp->putc(ch); 680c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } 690c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } 700c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer break; /* Exit 'timer' loop */ 710c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } 720c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer udelay(1000); /* 1 msec */ 730c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } 740c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer *cp = 0; 750c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer} 760c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 770c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greerstatic void serial_close(void) 780c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer{ 790c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer struct serial_console_data *scdp = console_ops.data; 800c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 810c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if (scdp->close) 820c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer scdp->close(); 830c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer} 840c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 850c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greerstatic void *serial_get_stdout_devp(void) 860c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer{ 870c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer void *devp; 880c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer char devtype[MAX_PROP_LEN]; 890c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer char path[MAX_PATH_LEN]; 900c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 910c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer devp = finddevice("/chosen"); 920c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if (devp == NULL) 930c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer goto err_out; 940c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 950c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if (getprop(devp, "linux,stdout-path", path, MAX_PATH_LEN) > 0) { 960c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer devp = finddevice(path); 970c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if (devp == NULL) 980c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer goto err_out; 990c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 1000c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if ((getprop(devp, "device_type", devtype, sizeof(devtype)) > 0) 1010c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer && !strcmp(devtype, "serial")) 1020c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer return devp; 1030c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } 1040c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greererr_out: 1050c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer return NULL; 1060c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer} 1070c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 1080c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greerstatic struct serial_console_data serial_cd; 1090c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 1100c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer/* Node's "compatible" property determines which serial driver to use */ 1110c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greerint serial_console_init(void) 1120c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer{ 1130c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer void *devp; 1140c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer int rc = -1; 1150c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 1160c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer devp = serial_get_stdout_devp(); 1170c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if (devp == NULL) 1180c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer goto err_out; 1190c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 1208f23735d8f8cfd4d46e3aa336690f52b8b5d3c75Gerhard Pircher if (dt_is_compatible(devp, "ns16550") || 1218f23735d8f8cfd4d46e3aa336690f52b8b5d3c75Gerhard Pircher dt_is_compatible(devp, "pnpPNP,501")) 1220c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer rc = ns16550_console_init(devp, &serial_cd); 123a1810b44c2d52392cd63e17fc208783cf6be6215Mark A. Greer else if (dt_is_compatible(devp, "marvell,mv64360-mpsc")) 124e12deb840ceed7051ab4799ae71b675a83c58c7cMark A. Greer rc = mpsc_console_init(devp, &serial_cd); 125d0f53fafc016b3f4f20f63ecf52f6df8774bcb3cScott Wood else if (dt_is_compatible(devp, "fsl,cpm1-scc-uart") || 126d0f53fafc016b3f4f20f63ecf52f6df8774bcb3cScott Wood dt_is_compatible(devp, "fsl,cpm1-smc-uart") || 127d0f53fafc016b3f4f20f63ecf52f6df8774bcb3cScott Wood dt_is_compatible(devp, "fsl,cpm2-scc-uart") || 128d0f53fafc016b3f4f20f63ecf52f6df8774bcb3cScott Wood dt_is_compatible(devp, "fsl,cpm2-smc-uart")) 129d0f53fafc016b3f4f20f63ecf52f6df8774bcb3cScott Wood rc = cpm_console_init(devp, &serial_cd); 13024ce6bc4a2b75509b29372f1e5e7e0fe51d98e66Grant Likely else if (dt_is_compatible(devp, "fsl,mpc5200-psc-uart")) 13185498ae87c7d789de613b7e21bd539577142c3cbGrant Likely rc = mpc5200_psc_console_init(devp, &serial_cd); 132c35a8fb2f2467c93fe402b1d4b1e124341d0da13Stephen Neuendorffer else if (dt_is_compatible(devp, "xlnx,opb-uartlite-1.00.b") || 133c35a8fb2f2467c93fe402b1d4b1e124341d0da13Stephen Neuendorffer dt_is_compatible(devp, "xlnx,xps-uartlite-1.00.a")) 1347ddc5f978b16c024b6c1fcecbda6815d3d3222efGrant Likely rc = uartlite_console_init(devp, &serial_cd); 1350c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 1360c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer /* Add other serial console driver calls here */ 1370c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 1380c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer if (!rc) { 1390c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer console_ops.open = serial_open; 1400c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer console_ops.write = serial_write; 1410c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer console_ops.close = serial_close; 1420c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer console_ops.data = &serial_cd; 1430c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer 144dc4f397d6e385c4ea0fe9732df911a86f1a78c9aScott Wood if (serial_cd.getc) 145dc4f397d6e385c4ea0fe9732df911a86f1a78c9aScott Wood console_ops.edit_cmdline = serial_edit_cmdline; 146dc4f397d6e385c4ea0fe9732df911a86f1a78c9aScott Wood 1470c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer return 0; 1480c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer } 1490c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greererr_out: 1500c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer return -1; 1510c176fa80fdfa9b4e0753e37223b056994c818d2Mark A. Greer} 152