x86: Move olpc to platform
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andres Salomon <dilinger@queued.net>
Este cometimento está contido em:
Thomas Gleixner
cometido por
Ingo Molnar
Ingo Molnar
ascendente
329b84e42e
cometimento
8654b1c2de
@@ -1,6 +1,7 @@
|
||||
# Platform specific code goes here
|
||||
obj-y += efi/
|
||||
obj-y += mrst/
|
||||
obj-y += olpc/
|
||||
obj-y += scx200/
|
||||
obj-y += sfi/
|
||||
obj-y += visws/
|
||||
|
||||
3
arch/x86/platform/olpc/Makefile
Ficheiro normal
3
arch/x86/platform/olpc/Makefile
Ficheiro normal
@@ -0,0 +1,3 @@
|
||||
obj-$(CONFIG_OLPC) += olpc.o
|
||||
obj-$(CONFIG_OLPC_XO1) += olpc-xo1.o
|
||||
obj-$(CONFIG_OLPC_OPENFIRMWARE) += olpc_ofw.o
|
||||
140
arch/x86/platform/olpc/olpc-xo1.c
Ficheiro normal
140
arch/x86/platform/olpc/olpc-xo1.c
Ficheiro normal
@@ -0,0 +1,140 @@
|
||||
/*
|
||||
* Support for features of the OLPC XO-1 laptop
|
||||
*
|
||||
* Copyright (C) 2010 One Laptop per Child
|
||||
* Copyright (C) 2006 Red Hat, Inc.
|
||||
* 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/module.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/pci_ids.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/pm.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/olpc.h>
|
||||
|
||||
#define DRV_NAME "olpc-xo1"
|
||||
|
||||
#define PMS_BAR 4
|
||||
#define ACPI_BAR 5
|
||||
|
||||
/* PMC registers (PMS block) */
|
||||
#define PM_SCLK 0x10
|
||||
#define PM_IN_SLPCTL 0x20
|
||||
#define PM_WKXD 0x34
|
||||
#define PM_WKD 0x30
|
||||
#define PM_SSC 0x54
|
||||
|
||||
/* PM registers (ACPI block) */
|
||||
#define PM1_CNT 0x08
|
||||
#define PM_GPE0_STS 0x18
|
||||
|
||||
static unsigned long acpi_base;
|
||||
static unsigned long pms_base;
|
||||
|
||||
static void xo1_power_off(void)
|
||||
{
|
||||
printk(KERN_INFO "OLPC XO-1 power off sequence...\n");
|
||||
|
||||
/* Enable all of these controls with 0 delay */
|
||||
outl(0x40000000, pms_base + PM_SCLK);
|
||||
outl(0x40000000, pms_base + PM_IN_SLPCTL);
|
||||
outl(0x40000000, pms_base + PM_WKXD);
|
||||
outl(0x40000000, pms_base + PM_WKD);
|
||||
|
||||
/* Clear status bits (possibly unnecessary) */
|
||||
outl(0x0002ffff, pms_base + PM_SSC);
|
||||
outl(0xffffffff, acpi_base + PM_GPE0_STS);
|
||||
|
||||
/* Write SLP_EN bit to start the machinery */
|
||||
outl(0x00002000, acpi_base + PM1_CNT);
|
||||
}
|
||||
|
||||
/* Read the base addresses from the PCI BAR info */
|
||||
static int __devinit setup_bases(struct pci_dev *pdev)
|
||||
{
|
||||
int r;
|
||||
|
||||
r = pci_enable_device_io(pdev);
|
||||
if (r) {
|
||||
dev_err(&pdev->dev, "can't enable device IO\n");
|
||||
return r;
|
||||
}
|
||||
|
||||
r = pci_request_region(pdev, ACPI_BAR, DRV_NAME);
|
||||
if (r) {
|
||||
dev_err(&pdev->dev, "can't alloc PCI BAR #%d\n", ACPI_BAR);
|
||||
return r;
|
||||
}
|
||||
|
||||
r = pci_request_region(pdev, PMS_BAR, DRV_NAME);
|
||||
if (r) {
|
||||
dev_err(&pdev->dev, "can't alloc PCI BAR #%d\n", PMS_BAR);
|
||||
pci_release_region(pdev, ACPI_BAR);
|
||||
return r;
|
||||
}
|
||||
|
||||
acpi_base = pci_resource_start(pdev, ACPI_BAR);
|
||||
pms_base = pci_resource_start(pdev, PMS_BAR);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devinit olpc_xo1_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct pci_dev *pcidev;
|
||||
int r;
|
||||
|
||||
pcidev = pci_get_device(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
|
||||
NULL);
|
||||
if (!pdev)
|
||||
return -ENODEV;
|
||||
|
||||
r = setup_bases(pcidev);
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
pm_power_off = xo1_power_off;
|
||||
|
||||
printk(KERN_INFO "OLPC XO-1 support registered\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devexit olpc_xo1_remove(struct platform_device *pdev)
|
||||
{
|
||||
pm_power_off = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver olpc_xo1_driver = {
|
||||
.driver = {
|
||||
.name = DRV_NAME,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = olpc_xo1_probe,
|
||||
.remove = __devexit_p(olpc_xo1_remove),
|
||||
};
|
||||
|
||||
static int __init olpc_xo1_init(void)
|
||||
{
|
||||
return platform_driver_register(&olpc_xo1_driver);
|
||||
}
|
||||
|
||||
static void __exit olpc_xo1_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&olpc_xo1_driver);
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:olpc-xo1");
|
||||
|
||||
module_init(olpc_xo1_init);
|
||||
module_exit(olpc_xo1_exit);
|
||||
281
arch/x86/platform/olpc/olpc.c
Ficheiro normal
281
arch/x86/platform/olpc/olpc.c
Ficheiro normal
@@ -0,0 +1,281 @@
|
||||
/*
|
||||
* 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);
|
||||
112
arch/x86/platform/olpc/olpc_ofw.c
Ficheiro normal
112
arch/x86/platform/olpc/olpc_ofw.c
Ficheiro normal
@@ -0,0 +1,112 @@
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <asm/page.h>
|
||||
#include <asm/setup.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/pgtable.h>
|
||||
#include <asm/olpc_ofw.h>
|
||||
|
||||
/* address of OFW callback interface; will be NULL if OFW isn't found */
|
||||
static int (*olpc_ofw_cif)(int *);
|
||||
|
||||
/* page dir entry containing OFW's pgdir table; filled in by head_32.S */
|
||||
u32 olpc_ofw_pgd __initdata;
|
||||
|
||||
static DEFINE_SPINLOCK(ofw_lock);
|
||||
|
||||
#define MAXARGS 10
|
||||
|
||||
void __init setup_olpc_ofw_pgd(void)
|
||||
{
|
||||
pgd_t *base, *ofw_pde;
|
||||
|
||||
if (!olpc_ofw_cif)
|
||||
return;
|
||||
|
||||
/* fetch OFW's PDE */
|
||||
base = early_ioremap(olpc_ofw_pgd, sizeof(olpc_ofw_pgd) * PTRS_PER_PGD);
|
||||
if (!base) {
|
||||
printk(KERN_ERR "failed to remap OFW's pgd - disabling OFW!\n");
|
||||
olpc_ofw_cif = NULL;
|
||||
return;
|
||||
}
|
||||
ofw_pde = &base[OLPC_OFW_PDE_NR];
|
||||
|
||||
/* install OFW's PDE permanently into the kernel's pgtable */
|
||||
set_pgd(&swapper_pg_dir[OLPC_OFW_PDE_NR], *ofw_pde);
|
||||
/* implicit optimization barrier here due to uninline function return */
|
||||
|
||||
early_iounmap(base, sizeof(olpc_ofw_pgd) * PTRS_PER_PGD);
|
||||
}
|
||||
|
||||
int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res,
|
||||
void **res)
|
||||
{
|
||||
int ofw_args[MAXARGS + 3];
|
||||
unsigned long flags;
|
||||
int ret, i, *p;
|
||||
|
||||
BUG_ON(nr_args + nr_res > MAXARGS);
|
||||
|
||||
if (!olpc_ofw_cif)
|
||||
return -EIO;
|
||||
|
||||
ofw_args[0] = (int)name;
|
||||
ofw_args[1] = nr_args;
|
||||
ofw_args[2] = nr_res;
|
||||
|
||||
p = &ofw_args[3];
|
||||
for (i = 0; i < nr_args; i++, p++)
|
||||
*p = (int)args[i];
|
||||
|
||||
/* call into ofw */
|
||||
spin_lock_irqsave(&ofw_lock, flags);
|
||||
ret = olpc_ofw_cif(ofw_args);
|
||||
spin_unlock_irqrestore(&ofw_lock, flags);
|
||||
|
||||
if (!ret) {
|
||||
for (i = 0; i < nr_res; i++, p++)
|
||||
*((int *)res[i]) = *p;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(__olpc_ofw);
|
||||
|
||||
bool olpc_ofw_present(void)
|
||||
{
|
||||
return olpc_ofw_cif != NULL;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(olpc_ofw_present);
|
||||
|
||||
/* OFW cif _should_ be above this address */
|
||||
#define OFW_MIN 0xff000000
|
||||
|
||||
/* OFW starts on a 1MB boundary */
|
||||
#define OFW_BOUND (1<<20)
|
||||
|
||||
void __init olpc_ofw_detect(void)
|
||||
{
|
||||
struct olpc_ofw_header *hdr = &boot_params.olpc_ofw_header;
|
||||
unsigned long start;
|
||||
|
||||
/* ensure OFW booted us by checking for "OFW " string */
|
||||
if (hdr->ofw_magic != OLPC_OFW_SIG)
|
||||
return;
|
||||
|
||||
olpc_ofw_cif = (int (*)(int *))hdr->cif_handler;
|
||||
|
||||
if ((unsigned long)olpc_ofw_cif < OFW_MIN) {
|
||||
printk(KERN_ERR "OFW detected, but cif has invalid address 0x%lx - disabling.\n",
|
||||
(unsigned long)olpc_ofw_cif);
|
||||
olpc_ofw_cif = NULL;
|
||||
return;
|
||||
}
|
||||
|
||||
/* determine where OFW starts in memory */
|
||||
start = round_down((unsigned long)olpc_ofw_cif, OFW_BOUND);
|
||||
printk(KERN_INFO "OFW detected in memory, cif @ 0x%lx (reserving top %ldMB)\n",
|
||||
(unsigned long)olpc_ofw_cif, (-start) >> 20);
|
||||
reserve_top_address(-start);
|
||||
}
|
||||
Criar uma nova questão referindo esta
Bloquear um utilizador