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-rw-r--r--arch/x86/kernel/olpc.c281
1 files changed, 0 insertions, 281 deletions
diff --git a/arch/x86/kernel/olpc.c b/arch/x86/kernel/olpc.c
deleted file mode 100644
index edaf3fe8dc5..00000000000
--- a/arch/x86/kernel/olpc.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * Support for the OLPC DCON and OLPC EC access
- *
- * Copyright © 2006 Advanced Micro Devices, Inc.
- * Copyright © 2007-2008 Andres Salomon <dilinger@debian.org>
- *
- * 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/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/spinlock.h>
-#include <linux/io.h>
-#include <linux/string.h>
-#include <linux/platform_device.h>
-
-#include <asm/geode.h>
-#include <asm/setup.h>
-#include <asm/olpc.h>
-#include <asm/olpc_ofw.h>
-
-struct olpc_platform_t olpc_platform_info;
-EXPORT_SYMBOL_GPL(olpc_platform_info);
-
-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 {i,o}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: %d: waited %u ms for IBF!\n",
- line, ec_timeout - timeo);
- }
-
- 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: %d: waited %u ms for OBF!\n",
- line, ec_timeout - timeo);
- }
-
- return !(state == desired);
-}
-
-/*
- * This allows the kernel to run Embedded Controller commands. The EC is
- * documented at <http://wiki.laptop.org/go/Embedded_controller>, and the
- * available EC commands are here:
- * <http://wiki.laptop.org/go/Ec_specification>. Unfortunately, while
- * OpenFirmware's source is available, the EC's is not.
- */
-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;
- int restarts = 0;
-
- spin_lock_irqsave(&ec_lock, flags);
-
- /* Clear OBF */
- for (i = 0; i < 10 && (obf_status(0x6c) == 1); i++)
- inb(0x68);
- if (i == 10) {
- printk(KERN_ERR "olpc-ec: timeout while attempting to "
- "clear OBF flag!\n");
- goto err;
- }
-
- 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..
- */
- pr_devel("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;
- }
- pr_devel("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");
- if (restarts++ < 10)
- goto restart;
- goto err;
- }
- outbuf[i] = inb(0x68);
- pr_devel("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);
-
-static bool __init check_ofw_architecture(void)
-{
- size_t propsize;
- char olpc_arch[5];
- const void *args[] = { NULL, "architecture", olpc_arch, (void *)5 };
- void *res[] = { &propsize };
-
- if (olpc_ofw("getprop", args, res)) {
- printk(KERN_ERR "ofw: getprop call failed!\n");
- return false;
- }
- return propsize == 5 && strncmp("OLPC", olpc_arch, 5) == 0;
-}
-
-static u32 __init get_board_revision(void)
-{
- size_t propsize;
- __be32 rev;
- const void *args[] = { NULL, "board-revision-int", &rev, (void *)4 };
- void *res[] = { &propsize };
-
- if (olpc_ofw("getprop", args, res) || propsize != 4) {
- printk(KERN_ERR "ofw: getprop call failed!\n");
- return cpu_to_be32(0);
- }
- return be32_to_cpu(rev);
-}
-
-static bool __init platform_detect(void)
-{
- if (!check_ofw_architecture())
- return false;
- olpc_platform_info.flags |= OLPC_F_PRESENT;
- olpc_platform_info.boardrev = get_board_revision();
- return true;
-}
-
-static int __init add_xo1_platform_devices(void)
-{
- struct platform_device *pdev;
-
- pdev = platform_device_register_simple("xo1-rfkill", -1, NULL, 0);
- if (IS_ERR(pdev))
- return PTR_ERR(pdev);
-
- pdev = platform_device_register_simple("olpc-xo1", -1, NULL, 0);
- if (IS_ERR(pdev))
- return PTR_ERR(pdev);
-
- return 0;
-}
-
-static int __init olpc_init(void)
-{
- int r = 0;
-
- if (!olpc_ofw_present() || !platform_detect())
- return 0;
-
- spin_lock_init(&ec_lock);
-
- /* assume B1 and above models always have a DCON */
- if (olpc_board_at_least(olpc_board(0xb1)))
- olpc_platform_info.flags |= OLPC_F_DCON;
-
- /* get the EC revision */
- olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0,
- (unsigned char *) &olpc_platform_info.ecver, 1);
-
-#ifdef CONFIG_PCI_OLPC
- /* If the VSA exists let it emulate PCI, if not emulate in kernel.
- * XO-1 only. */
- if (olpc_platform_info.boardrev < olpc_board_pre(0xd0) &&
- !cs5535_has_vsa2())
- x86_init.pci.arch_init = pci_olpc_init;
-#endif
-
- printk(KERN_INFO "OLPC board revision %s%X (EC=%x)\n",
- ((olpc_platform_info.boardrev & 0xf) < 8) ? "pre" : "",
- olpc_platform_info.boardrev >> 4,
- olpc_platform_info.ecver);
-
- if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) { /* XO-1 */
- r = add_xo1_platform_devices();
- if (r)
- return r;
- }
-
- return 0;
-}
-
-postcore_initcall(olpc_init);