---

yaml
---
r: 260301
b: refs/heads/master
c: bc4ecd5
h: refs/heads/master
i:
  260299: 42b4c20
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7feda8e9f35ebb0e9f90e03acb02280bc137f784
+refs/heads/master: bc4ecd5a5efc2435e6debfb7b279a15ae96697fd

trunk/arch/x86/include/asm/olpc.h

@@ -13,6 +13,7 @@ struct olpc_platform_t {
 
 #define OLPC_F_PRESENT		0x01
 #define OLPC_F_DCON		0x02
+#define OLPC_F_EC_WIDE_SCI	0x04
 
 #ifdef CONFIG_OLPC
 
@@ -62,6 +63,13 @@ static inline int olpc_board_at_least(uint32_t rev)
 	return olpc_platform_info.boardrev >= rev;
 }
 
+extern void olpc_ec_wakeup_set(u16 value);
+extern void olpc_ec_wakeup_clear(u16 value);
+extern bool olpc_ec_wakeup_available(void);
+
+extern int olpc_ec_mask_write(u16 bits);
+extern int olpc_ec_sci_query(u16 *sci_value);
+
 #else
 
 static inline int machine_is_olpc(void)
@@ -74,6 +82,14 @@ static inline int olpc_has_dcon(void)
 	return 0;
 }
 
+static inline void olpc_ec_wakeup_set(u16 value) { }
+static inline void olpc_ec_wakeup_clear(u16 value) { }
+
+static inline bool olpc_ec_wakeup_available(void)
+{
+	return false;
+}
+
 #endif
 
 #ifdef CONFIG_OLPC_XO1_PM
@@ -89,17 +105,18 @@ extern int pci_olpc_init(void);
 extern int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,
 		unsigned char *outbuf, size_t outlen);
 
-extern int olpc_ec_mask_set(uint8_t bits);
-extern int olpc_ec_mask_unset(uint8_t bits);
-
 /* 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_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 */
 
@@ -108,10 +125,12 @@ extern int olpc_ec_mask_unset(uint8_t bits);
 #define EC_SCI_SRC_BATTERY	0x02
 #define EC_SCI_SRC_BATSOC	0x04
 #define EC_SCI_SRC_BATERR	0x08
-#define EC_SCI_SRC_EBOOK	0x10
-#define EC_SCI_SRC_WLAN		0x20
+#define EC_SCI_SRC_EBOOK	0x10	/* XO-1 only */
+#define EC_SCI_SRC_WLAN		0x20	/* XO-1 only */
 #define EC_SCI_SRC_ACPWR	0x40
-#define EC_SCI_SRC_ALL		0x7F
+#define EC_SCI_SRC_BATCRIT	0x80
+#define EC_SCI_SRC_GPWAKE	0x100	/* XO-1.5 only */
+#define EC_SCI_SRC_ALL		0x1FF
 
 /* GPIO assignments */
 

trunk/arch/x86/platform/olpc/olpc.c

@@ -19,6 +19,7 @@
 #include <linux/string.h>
 #include <linux/platform_device.h>
 #include <linux/of.h>
+#include <linux/syscore_ops.h>
 
 #include <asm/geode.h>
 #include <asm/setup.h>
@@ -30,6 +31,9 @@ EXPORT_SYMBOL_GPL(olpc_platform_info);
 
 static DEFINE_SPINLOCK(ec_lock);
 
+/* EC event mask to be applied during suspend (defining wakeup sources). */
+static u16 ec_wakeup_mask;
+
 /* what the timeout *should* be (in ms) */
 #define EC_BASE_TIMEOUT 20
 
@@ -188,6 +192,79 @@ int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,
 }
 EXPORT_SYMBOL_GPL(olpc_ec_cmd);
 
+void olpc_ec_wakeup_set(u16 value)
+{
+	ec_wakeup_mask |= value;
+}
+EXPORT_SYMBOL_GPL(olpc_ec_wakeup_set);
+
+void olpc_ec_wakeup_clear(u16 value)
+{
+	ec_wakeup_mask &= ~value;
+}
+EXPORT_SYMBOL_GPL(olpc_ec_wakeup_clear);
+
+/*
+ * Returns true if the compile and runtime configurations allow for EC events
+ * to wake the system.
+ */
+bool olpc_ec_wakeup_available(void)
+{
+	if (!machine_is_olpc())
+		return false;
+
+	/*
+	 * XO-1 EC wakeups are available when olpc-xo1-sci driver is
+	 * compiled in
+	 */
+#ifdef CONFIG_OLPC_XO1_SCI
+	if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) /* XO-1 */
+		return true;
+#endif
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(olpc_ec_wakeup_available);
+
+int olpc_ec_mask_write(u16 bits)
+{
+	if (olpc_platform_info.flags & OLPC_F_EC_WIDE_SCI) {
+		__be16 ec_word = cpu_to_be16(bits);
+		return olpc_ec_cmd(EC_WRITE_EXT_SCI_MASK, (void *) &ec_word, 2,
+				   NULL, 0);
+	} else {
+		unsigned char ec_byte = bits & 0xff;
+		return olpc_ec_cmd(EC_WRITE_SCI_MASK, &ec_byte, 1, NULL, 0);
+	}
+}
+EXPORT_SYMBOL_GPL(olpc_ec_mask_write);
+
+int olpc_ec_sci_query(u16 *sci_value)
+{
+	int ret;
+
+	if (olpc_platform_info.flags & OLPC_F_EC_WIDE_SCI) {
+		__be16 ec_word;
+		ret = olpc_ec_cmd(EC_EXT_SCI_QUERY,
+			NULL, 0, (void *) &ec_word, 2);
+		if (ret == 0)
+			*sci_value = be16_to_cpu(ec_word);
+	} else {
+		unsigned char ec_byte;
+		ret = olpc_ec_cmd(EC_SCI_QUERY, NULL, 0, &ec_byte, 1);
+		if (ret == 0)
+			*sci_value = ec_byte;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(olpc_ec_sci_query);
+
+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;
@@ -242,6 +319,10 @@ static int __init add_xo1_platform_devices(void)
 	return 0;
 }
 
+static struct syscore_ops olpc_syscore_ops = {
+	.suspend = olpc_ec_suspend,
+};
+
 static int __init olpc_init(void)
 {
 	int r = 0;
@@ -266,6 +347,9 @@ 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" : "",
@@ -278,6 +362,8 @@ static int __init olpc_init(void)
 			return r;
 	}
 
+	register_syscore_ops(&olpc_syscore_ops);
+
 	return 0;
 }