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Commit 85f90cf6 authored by Andres Salomon's avatar Andres Salomon
Browse files

x86: OLPC: switch over to using new EC driver on x86 



This uses the new EC driver framework in drivers/platform/olpc.  The
XO-1 and XO-1.5-specific code is still in arch/x86, but the generic stuff
(including a new workqueue; no more running EC commands with IRQs disabled!)
can be shared with other architectures.

Signed-off-by: default avatarAndres Salomon <dilinger@queued.net>
Acked-by: default avatarPaul Fox <pgf@laptop.org>
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent d278b7a2

arch/x86/include/asm/olpc.h

+0 −5
Original line number Diff line number Diff line
@@ -100,11 +100,6 @@ extern void olpc_xo1_pm_wakeup_clear(u16 value); 


extern int pci_olpc_init(void);



/* EC related functions */



extern int olpc_ec_cmd_x86(unsigned char cmd, unsigned char *inbuf,

		size_t inlen, unsigned char *outbuf, size_t outlen);



/* SCI source values */



#define EC_SCI_SRC_EMPTY	0x00

arch/x86/platform/olpc/olpc.c

+27 −26
Original line number Diff line number Diff line
@@ -14,7 +14,6 @@ 
#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>
@@ -32,8 +31,6 @@ 
struct olpc_platform_t olpc_platform_info;

EXPORT_SYMBOL_GPL(olpc_platform_info);



static DEFINE_SPINLOCK(ec_lock);



/* debugfs interface to EC commands */

#define EC_MAX_CMD_ARGS (5 + 1)	/* cmd byte + 5 args */

#define EC_MAX_CMD_REPLY (8)
@@ -126,16 +123,13 @@ static int __wait_on_obf(unsigned int line, unsigned int port, int desired) 
 * <http://wiki.laptop.org/go/Ec_specification>.  Unfortunately, while

 * OpenFirmware's source is available, the EC's is not.

 */

int olpc_ec_cmd_x86(unsigned char cmd, unsigned char *inbuf, size_t inlen,

		unsigned char *outbuf,  size_t outlen)

static int olpc_xo1_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf,

		size_t outlen, void *arg)

{

	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);
@@ -199,10 +193,8 @@ int olpc_ec_cmd_x86(unsigned char cmd, unsigned char *inbuf, size_t inlen, 


	ret = 0;

err:

	spin_unlock_irqrestore(&ec_lock, flags);

	return ret;

}

EXPORT_SYMBOL_GPL(olpc_ec_cmd_x86);



void olpc_ec_wakeup_set(u16 value)

{
@@ -366,7 +358,7 @@ static void setup_debugfs(void) 
			    &ec_debugfs_genops);

}



static int olpc_ec_suspend(void)

static int olpc_ec_suspend(struct platform_device *pdev)

{

	return olpc_ec_mask_write(ec_wakeup_mask);

}
@@ -425,8 +417,28 @@ static int __init add_xo1_platform_devices(void) 
	return 0;

}



static struct syscore_ops olpc_syscore_ops = {

static int olpc_xo1_ec_probe(struct platform_device *pdev)

{

	/* get the EC revision */

	olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0,

			(unsigned char *) &olpc_platform_info.ecver, 1);



	/* EC version 0x5f adds support for wide SCI mask */

	if (olpc_platform_info.ecver >= 0x5f)

		olpc_platform_info.flags |= OLPC_F_EC_WIDE_SCI;



	pr_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);



	return 0;

}



static struct olpc_ec_driver ec_xo1_driver = {

	.suspend = olpc_ec_suspend,

	.probe = olpc_xo1_ec_probe,

	.ec_cmd = olpc_xo1_ec_cmd,

};



static int __init olpc_init(void)
@@ -436,16 +448,14 @@ static int __init olpc_init(void) 
	if (!olpc_ofw_present() || !platform_detect())

		return 0;



	spin_lock_init(&ec_lock);

	/* register the XO-1 and 1.5-specific EC handler */

	olpc_ec_driver_register(&ec_xo1_driver, NULL);

	platform_device_register_simple("olpc-ec", -1, NULL, 0);



	/* 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. */
@@ -453,14 +463,6 @@ static int __init olpc_init(void) 
			!cs5535_has_vsa2())

		x86_init.pci.arch_init = pci_olpc_init;

#endif

	/* EC version 0x5f adds support for wide SCI mask */

	if (olpc_platform_info.ecver >= 0x5f)

		olpc_platform_info.flags |= OLPC_F_EC_WIDE_SCI;



	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();
@@ -468,7 +470,6 @@ static int __init olpc_init(void) 
			return r;

	}



	register_syscore_ops(&olpc_syscore_ops);

	setup_debugfs();



	return 0;

drivers/platform/olpc/olpc-ec.c

+0 −5
Original line number Diff line number Diff line
@@ -113,11 +113,6 @@ int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf, size_t outlen) 
	struct olpc_ec_priv *ec = ec_priv;

	struct ec_cmd_desc desc;



	/* XXX: this will be removed in later patches */

	/* Are we using old-style callers? */

	if (!ec_driver || !ec_driver->ec_cmd)

		return olpc_ec_cmd_x86(cmd, inbuf, inlen, outbuf, outlen);



	/* Ensure a driver and ec hook have been registered */

	if (WARN_ON(!ec_driver || !ec_driver->ec_cmd))

		return -ENODEV;