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Adding .24 support for olpc

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kernel compiles fine, but graphic support is broken

to test new kernel version, change 
target/linux/olpc/Makefile
from .23.16 to .24



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10493 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
ryd
2008-02-19 04:03:49 +00:00
parent ac24192a89
commit e4a3634c00
28 changed files with 12422 additions and 2 deletions
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320
target/linux/olpc/files-2.6.23/arch/i386/kernel/olpc.c Normal file
View File

@@ -0,0 +1,320 @@
/* Support for the OLPC DCON and OLPC EC access
* Copyright (C) 2006, Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/autoconf.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mc146818rtc.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <asm/olpc.h>
#include <asm/ofw.h>
/* This is our new multi-purpose structure used to contain the
* information about the platform that we detect
*/
struct olpc_platform_t olpc_platform_info;
EXPORT_SYMBOL_GPL(olpc_platform_info);
/*********************************************************************
* EC locking and access
*********************************************************************/
static DEFINE_SPINLOCK(ec_lock);
/* what the timeout *should* be (in ms) */
#define EC_BASE_TIMEOUT 20
/* the timeout that bugs in the EC might force us to actually use */
static int ec_timeout = EC_BASE_TIMEOUT;
static int __init olpc_ec_timeout_set(char *str)
{
if (get_option(&str, &ec_timeout) != 1) {
ec_timeout = EC_BASE_TIMEOUT;
printk(KERN_ERR "olpc-ec: invalid argument to "
"'olpc_ec_timeout=', ignoring!\n");
}
printk(KERN_DEBUG "olpc-ec: using %d ms delay for EC commands.\n",
ec_timeout);
return 1;
}
__setup("olpc_ec_timeout=", olpc_ec_timeout_set);
/*
* These *bf_status functions return whether the buffers are full or not.
*/
static inline unsigned int ibf_status(unsigned int port)
{
return inb(port) & 0x02;
}
static inline unsigned int obf_status(unsigned int port)
{
return inb(port) & 0x01;
}
#define wait_on_ibf(p, d) __wait_on_ibf(__LINE__, (p), (d))
static int __wait_on_ibf(unsigned int line, unsigned int port, int desired)
{
unsigned int timeo;
int state = ibf_status(port);
for (timeo = ec_timeout; state != desired && timeo; timeo--) {
mdelay(1);
state = ibf_status(port);
}
if ((state == desired) && (ec_timeout > EC_BASE_TIMEOUT) &&
timeo < (ec_timeout - EC_BASE_TIMEOUT)) {
printk(KERN_WARNING "olpc-ec: waited %u ms for IBF (%d)!\n",
EC_BASE_TIMEOUT-timeo, line);
}
return !(state == desired);
}
#define wait_on_obf(p, d) __wait_on_obf(__LINE__, (p), (d))
static int __wait_on_obf(unsigned int line, unsigned int port, int desired)
{
unsigned int timeo;
int state = obf_status(port);
for (timeo = ec_timeout; state != desired && timeo; timeo--) {
mdelay(1);
state = obf_status(port);
}
if ((state == desired) && (ec_timeout > EC_BASE_TIMEOUT) &&
timeo < (ec_timeout - EC_BASE_TIMEOUT)) {
printk(KERN_WARNING "olpc-ec: waited %u ms for OBF (%d)!\n",
EC_BASE_TIMEOUT-timeo, line);
}
return !(state == desired);
}
int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,
unsigned char *outbuf, size_t outlen)
{
unsigned long flags;
int ret = -EIO;
int i;
spin_lock_irqsave(&ec_lock, flags);
if (wait_on_ibf(0x6c, 0)) {
printk(KERN_ERR "olpc-ec: timeout waiting for EC to "
"quiesce!\n");
goto err;
}
restart:
/*
* Note that if we time out during any IBF checks, that's a failure;
* we have to return. There's no way for the kernel to clear that.
*
* If we time out during an OBF check, we can restart the command;
* reissuing it will clear the OBF flag, and we should be alright.
* The OBF flag will sometimes misbehave due to what we believe
* is a hardware quirk..
*/
printk(KERN_DEBUG "olpc-ec: running cmd 0x%x\n", cmd);
outb(cmd, 0x6c);
if (wait_on_ibf(0x6c, 0)) {
printk(KERN_ERR "olpc-ec: timeout waiting for EC to read "
"command!\n");
goto err;
}
if (inbuf && inlen) {
/* write data to EC */
for (i = 0; i < inlen; i++) {
if (wait_on_ibf(0x6c, 0)) {
printk(KERN_ERR "olpc-ec: timeout waiting for"
" EC accept data!\n");
goto err;
}
printk(KERN_DEBUG "olpc-ec: sending cmd arg 0x%x\n",
inbuf[i]);
outb(inbuf[i], 0x68);
}
}
if (outbuf && outlen) {
/* read data from EC */
for (i = 0; i < outlen; i++) {
if (wait_on_obf(0x6c, 1)) {
printk(KERN_ERR "olpc-ec: timeout waiting for"
" EC to provide data!\n");
goto restart;
}
outbuf[i] = inb(0x68);
printk(KERN_DEBUG "olpc-ec: received 0x%x\n",
outbuf[i]);
}
}
ret = 0;
err:
spin_unlock_irqrestore(&ec_lock, flags);
return ret;
}
EXPORT_SYMBOL_GPL(olpc_ec_cmd);
/*********************************************************************
* DCON stuff
*********************************************************************/
static void olpc_power_off(void)
{
printk(KERN_INFO "OLPC power off sequence...\n");
outb(0xff, 0x381);
outb(0x14, 0x382);
outb(0x01, 0x383);
outb(0xff, 0x381);
outb(0x14, 0x382);
outb(0x00, 0x383);
}
static void __init
ec_detect(void)
{
olpc_ec_cmd(0x08, NULL, 0, (unsigned char *) &olpc_platform_info.ecver, 1);
}
/* Check to see if this version of the OLPC board has VSA built
* in, and set a flag
*/
static void __init vsa_detect(void)
{
u16 rev;
outw(0xFC53, 0xAC1C);
outw(0x0003, 0xAC1C);
rev = inw(0xAC1E);
if (rev == 0x4132)
olpc_platform_info.flags |= OLPC_F_VSA;
}
/* Map OFW revisions to what OLPC_REV_* */
static const char __initdata *olpc_boardrev_str[] = {
"A1",
"preB1",
"B1",
"preB2",
"B2",
"preB3",
"B3",
"B4",
"C1",
"R1",
};
static void __init platform_detect(char *revision, size_t len)
{
size_t propsize;
int i;
BUG_ON(ARRAY_SIZE(olpc_boardrev_str) != OLPC_REV_UNKNOWN);
if (ofw("getprop", 4, 1, NULL, "model", revision, len, &propsize)) {
printk(KERN_ERR "ofw: getprop call failed!\n");
goto failed;
}
if (len < propsize) {
printk(KERN_ERR "ofw: revision string is too long!\n");
goto failed;
}
for (i=0; i < ARRAY_SIZE(olpc_boardrev_str); i++) {
if (strcmp(revision, olpc_boardrev_str[i]) == 0) {
olpc_platform_info.boardrev = i;
return;
}
}
failed:
strncpy(revision, "Unknown", len);
olpc_platform_info.boardrev = OLPC_REV_UNKNOWN;
}
static int olpc_dcon_present = -1;
module_param(olpc_dcon_present, int, 0444);
/* REV_A CMOS map:
* bit 440; DCON present bit
*/
#define OLPC_CMOS_DCON_OFFSET (440 / 8)
#define OLPC_CMOS_DCON_MASK 0x01
static int __init olpc_init(void)
{
unsigned char *romsig;
char revision[10];
spin_lock_init(&ec_lock);
romsig = ioremap(0xffffffc0, 16);
if (!romsig)
return 0;
if (strncmp(romsig, "CL1 Q", 7))
goto unmap;
if (strncmp(romsig+6, romsig+13, 3)) {
printk(KERN_INFO "OLPC BIOS signature looks invalid. Assuming not OLPC\n");
goto unmap;
}
printk(KERN_INFO "OLPC board with OpenFirmware: %.16s\n", romsig);
olpc_platform_info.flags |= OLPC_F_PRESENT;
pm_power_off = olpc_power_off;
/* Get the platform revision */
platform_detect(revision, sizeof(revision));
/* If olpc_dcon_present isn't set by the command line, then
* "detect" it
*/
if (olpc_dcon_present == -1) {
/* B1 and greater always has a DCON */
if (olpc_platform_info.boardrev >= OLPC_REV_B1 &&
olpc_platform_info.boardrev < OLPC_REV_UNKNOWN)
olpc_dcon_present = 1;
}
if (olpc_dcon_present)
olpc_platform_info.flags |= OLPC_F_DCON;
/* Get the EC revision */
ec_detect();
/* Check to see if the VSA exists */
vsa_detect();
printk(KERN_INFO "OLPC board revision: %s (EC=%x)\n", revision,
olpc_platform_info.ecver);
unmap:
iounmap(romsig);
return 0;
}
postcore_initcall(olpc_init);