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authorLinus Torvalds <torvalds@linux-foundation.org>2012-08-02 11:52:39 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-08-02 11:52:39 -0700
commitfc6bdb59a501740b28ed3b616641a22c8dc5dd31 (patch)
tree00ddba349c7e96b03af0913da1a74eae8a94a2db /arch/x86
parent44d82e2963551eafa378a3fc7a923df7853af4e2 (diff)
parent1fcfd08bd0704e1888bd73153e8d2ca3640e22f2 (diff)
downloadlinux-linaro-stable-fc6bdb59a501740b28ed3b616641a22c8dc5dd31.tar.gz
Merge branch 'for-linus-3.6' of git://dev.laptop.org/users/dilinger/linux-olpc
Pull OLPC platform updates from Andres Salomon: "These move the OLPC Embedded Controller driver out of arch/x86/platform and into drivers/platform/olpc. OLPC machines are now ARM-based (which means lots of x86 and ARM changes), but are typically pretty self-contained.. so it makes more sense to go through a separate OLPC tree after getting the appropriate review/ACKs." * 'for-linus-3.6' of git://dev.laptop.org/users/dilinger/linux-olpc: x86: OLPC: move s/r-related EC cmds to EC driver Platform: OLPC: move global variables into priv struct Platform: OLPC: move debugfs support from x86 EC driver x86: OLPC: switch over to using new EC driver on x86 Platform: OLPC: add a suspended flag to the EC driver Platform: OLPC: turn EC driver into a platform_driver Platform: OLPC: allow EC cmd to be overridden, and create a workqueue to call it drivers: OLPC: update various drivers to include olpc-ec.h Platform: OLPC: add a stub to drivers/platform/ for the OLPC EC driver
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/olpc.h19
-rw-r--r--arch/x86/platform/olpc/olpc-xo1-pm.c16
-rw-r--r--arch/x86/platform/olpc/olpc-xo1-sci.c1
-rw-r--r--arch/x86/platform/olpc/olpc-xo15-sci.c1
-rw-r--r--arch/x86/platform/olpc/olpc.c190
5 files changed, 65 insertions, 162 deletions
diff --git a/arch/x86/include/asm/olpc.h b/arch/x86/include/asm/olpc.h
index 87bdbca72f94..72f9adf6eca4 100644
--- a/arch/x86/include/asm/olpc.h
+++ b/arch/x86/include/asm/olpc.h
@@ -100,25 +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(unsigned char cmd, unsigned char *inbuf, size_t inlen,
- unsigned char *outbuf, size_t outlen);
-
-/* EC commands */
-
-#define EC_FIRMWARE_REV 0x08
-#define EC_WRITE_SCI_MASK 0x1b
-#define EC_WAKE_UP_WLAN 0x24
-#define EC_WLAN_LEAVE_RESET 0x25
-#define EC_READ_EB_MODE 0x2a
-#define EC_SET_SCI_INHIBIT 0x32
-#define EC_SET_SCI_INHIBIT_RELEASE 0x34
-#define EC_WLAN_ENTER_RESET 0x35
-#define EC_WRITE_EXT_SCI_MASK 0x38
-#define EC_SCI_QUERY 0x84
-#define EC_EXT_SCI_QUERY 0x85
-
/* SCI source values */
#define EC_SCI_SRC_EMPTY 0x00
diff --git a/arch/x86/platform/olpc/olpc-xo1-pm.c b/arch/x86/platform/olpc/olpc-xo1-pm.c
index 0ce8616c88ae..d75582d1aa55 100644
--- a/arch/x86/platform/olpc/olpc-xo1-pm.c
+++ b/arch/x86/platform/olpc/olpc-xo1-pm.c
@@ -18,6 +18,7 @@
#include <linux/pm.h>
#include <linux/mfd/core.h>
#include <linux/suspend.h>
+#include <linux/olpc-ec.h>
#include <asm/io.h>
#include <asm/olpc.h>
@@ -51,16 +52,11 @@ EXPORT_SYMBOL_GPL(olpc_xo1_pm_wakeup_clear);
static int xo1_power_state_enter(suspend_state_t pm_state)
{
unsigned long saved_sci_mask;
- int r;
/* Only STR is supported */
if (pm_state != PM_SUSPEND_MEM)
return -EINVAL;
- r = olpc_ec_cmd(EC_SET_SCI_INHIBIT, NULL, 0, NULL, 0);
- if (r)
- return r;
-
/*
* Save SCI mask (this gets lost since PM1_EN is used as a mask for
* wakeup events, which is not necessarily the same event set)
@@ -76,16 +72,6 @@ static int xo1_power_state_enter(suspend_state_t pm_state)
/* Restore SCI mask (using dword access to CS5536_PM1_EN) */
outl(saved_sci_mask, acpi_base + CS5536_PM1_STS);
- /* Tell the EC to stop inhibiting SCIs */
- olpc_ec_cmd(EC_SET_SCI_INHIBIT_RELEASE, NULL, 0, NULL, 0);
-
- /*
- * Tell the wireless module to restart USB communication.
- * Must be done twice.
- */
- olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
- olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
-
return 0;
}
diff --git a/arch/x86/platform/olpc/olpc-xo1-sci.c b/arch/x86/platform/olpc/olpc-xo1-sci.c
index 04b8c73659c5..63d4aa40956e 100644
--- a/arch/x86/platform/olpc/olpc-xo1-sci.c
+++ b/arch/x86/platform/olpc/olpc-xo1-sci.c
@@ -23,6 +23,7 @@
#include <linux/power_supply.h>
#include <linux/suspend.h>
#include <linux/workqueue.h>
+#include <linux/olpc-ec.h>
#include <asm/io.h>
#include <asm/msr.h>
diff --git a/arch/x86/platform/olpc/olpc-xo15-sci.c b/arch/x86/platform/olpc/olpc-xo15-sci.c
index 599be499fdf7..2fdca25905ae 100644
--- a/arch/x86/platform/olpc/olpc-xo15-sci.c
+++ b/arch/x86/platform/olpc/olpc-xo15-sci.c
@@ -13,6 +13,7 @@
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/power_supply.h>
+#include <linux/olpc-ec.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
diff --git a/arch/x86/platform/olpc/olpc.c b/arch/x86/platform/olpc/olpc.c
index a4bee53c2e54..27376081ddec 100644
--- a/arch/x86/platform/olpc/olpc.c
+++ b/arch/x86/platform/olpc/olpc.c
@@ -14,14 +14,13 @@
#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 <linux/of.h>
#include <linux/syscore_ops.h>
-#include <linux/debugfs.h>
#include <linux/mutex.h>
+#include <linux/olpc-ec.h>
#include <asm/geode.h>
#include <asm/setup.h>
@@ -31,17 +30,6 @@
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)
-
-static struct dentry *ec_debugfs_dir;
-static DEFINE_MUTEX(ec_debugfs_cmd_lock);
-static unsigned char ec_debugfs_resp[EC_MAX_CMD_REPLY];
-static unsigned int ec_debugfs_resp_bytes;
-
/* EC event mask to be applied during suspend (defining wakeup sources). */
static u16 ec_wakeup_mask;
@@ -125,16 +113,13 @@ 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(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);
@@ -198,10 +183,8 @@ restart:
ret = 0;
err:
- spin_unlock_irqrestore(&ec_lock, flags);
return ret;
}
-EXPORT_SYMBOL_GPL(olpc_ec_cmd);
void olpc_ec_wakeup_set(u16 value)
{
@@ -280,96 +263,6 @@ int olpc_ec_sci_query(u16 *sci_value)
}
EXPORT_SYMBOL_GPL(olpc_ec_sci_query);
-static ssize_t ec_debugfs_cmd_write(struct file *file, const char __user *buf,
- size_t size, loff_t *ppos)
-{
- int i, m;
- unsigned char ec_cmd[EC_MAX_CMD_ARGS];
- unsigned int ec_cmd_int[EC_MAX_CMD_ARGS];
- char cmdbuf[64];
- int ec_cmd_bytes;
-
- mutex_lock(&ec_debugfs_cmd_lock);
-
- size = simple_write_to_buffer(cmdbuf, sizeof(cmdbuf), ppos, buf, size);
-
- m = sscanf(cmdbuf, "%x:%u %x %x %x %x %x", &ec_cmd_int[0],
- &ec_debugfs_resp_bytes,
- &ec_cmd_int[1], &ec_cmd_int[2], &ec_cmd_int[3],
- &ec_cmd_int[4], &ec_cmd_int[5]);
- if (m < 2 || ec_debugfs_resp_bytes > EC_MAX_CMD_REPLY) {
- /* reset to prevent overflow on read */
- ec_debugfs_resp_bytes = 0;
-
- printk(KERN_DEBUG "olpc-ec: bad ec cmd: "
- "cmd:response-count [arg1 [arg2 ...]]\n");
- size = -EINVAL;
- goto out;
- }
-
- /* convert scanf'd ints to char */
- ec_cmd_bytes = m - 2;
- for (i = 0; i <= ec_cmd_bytes; i++)
- ec_cmd[i] = ec_cmd_int[i];
-
- printk(KERN_DEBUG "olpc-ec: debugfs cmd 0x%02x with %d args "
- "%02x %02x %02x %02x %02x, want %d returns\n",
- ec_cmd[0], ec_cmd_bytes, ec_cmd[1], ec_cmd[2], ec_cmd[3],
- ec_cmd[4], ec_cmd[5], ec_debugfs_resp_bytes);
-
- olpc_ec_cmd(ec_cmd[0], (ec_cmd_bytes == 0) ? NULL : &ec_cmd[1],
- ec_cmd_bytes, ec_debugfs_resp, ec_debugfs_resp_bytes);
-
- printk(KERN_DEBUG "olpc-ec: response "
- "%02x %02x %02x %02x %02x %02x %02x %02x (%d bytes expected)\n",
- ec_debugfs_resp[0], ec_debugfs_resp[1], ec_debugfs_resp[2],
- ec_debugfs_resp[3], ec_debugfs_resp[4], ec_debugfs_resp[5],
- ec_debugfs_resp[6], ec_debugfs_resp[7], ec_debugfs_resp_bytes);
-
-out:
- mutex_unlock(&ec_debugfs_cmd_lock);
- return size;
-}
-
-static ssize_t ec_debugfs_cmd_read(struct file *file, char __user *buf,
- size_t size, loff_t *ppos)
-{
- unsigned int i, r;
- char *rp;
- char respbuf[64];
-
- mutex_lock(&ec_debugfs_cmd_lock);
- rp = respbuf;
- rp += sprintf(rp, "%02x", ec_debugfs_resp[0]);
- for (i = 1; i < ec_debugfs_resp_bytes; i++)
- rp += sprintf(rp, ", %02x", ec_debugfs_resp[i]);
- mutex_unlock(&ec_debugfs_cmd_lock);
- rp += sprintf(rp, "\n");
-
- r = rp - respbuf;
- return simple_read_from_buffer(buf, size, ppos, respbuf, r);
-}
-
-static const struct file_operations ec_debugfs_genops = {
- .write = ec_debugfs_cmd_write,
- .read = ec_debugfs_cmd_read,
-};
-
-static void setup_debugfs(void)
-{
- ec_debugfs_dir = debugfs_create_dir("olpc-ec", 0);
- if (ec_debugfs_dir == ERR_PTR(-ENODEV))
- return;
-
- debugfs_create_file("cmd", 0600, ec_debugfs_dir, NULL,
- &ec_debugfs_genops);
-}
-
-static int olpc_ec_suspend(void)
-{
- return olpc_ec_mask_write(ec_wakeup_mask);
-}
-
static bool __init check_ofw_architecture(struct device_node *root)
{
const char *olpc_arch;
@@ -424,8 +317,59 @@ static int __init add_xo1_platform_devices(void)
return 0;
}
-static struct syscore_ops olpc_syscore_ops = {
- .suspend = olpc_ec_suspend,
+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 int olpc_xo1_ec_suspend(struct platform_device *pdev)
+{
+ olpc_ec_mask_write(ec_wakeup_mask);
+
+ /*
+ * Squelch SCIs while suspended. This is a fix for
+ * <http://dev.laptop.org/ticket/1835>.
+ */
+ return olpc_ec_cmd(EC_SET_SCI_INHIBIT, NULL, 0, NULL, 0);
+}
+
+static int olpc_xo1_ec_resume(struct platform_device *pdev)
+{
+ /* Tell the EC to stop inhibiting SCIs */
+ olpc_ec_cmd(EC_SET_SCI_INHIBIT_RELEASE, NULL, 0, NULL, 0);
+
+ /*
+ * Tell the wireless module to restart USB communication.
+ * Must be done twice.
+ */
+ olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
+ olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
+
+ return 0;
+}
+
+static struct olpc_ec_driver ec_xo1_driver = {
+ .probe = olpc_xo1_ec_probe,
+ .suspend = olpc_xo1_ec_suspend,
+ .resume = olpc_xo1_ec_resume,
+ .ec_cmd = olpc_xo1_ec_cmd,
+};
+
+static struct olpc_ec_driver ec_xo1_5_driver = {
+ .probe = olpc_xo1_ec_probe,
+ .ec_cmd = olpc_xo1_ec_cmd,
};
static int __init olpc_init(void)
@@ -435,16 +379,17 @@ 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 */
+ if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) /* XO-1 */
+ olpc_ec_driver_register(&ec_xo1_driver, NULL);
+ else
+ olpc_ec_driver_register(&ec_xo1_5_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. */
@@ -452,14 +397,6 @@ 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();
@@ -467,9 +404,6 @@ static int __init olpc_init(void)
return r;
}
- register_syscore_ops(&olpc_syscore_ops);
- setup_debugfs();
-
return 0;
}