Merge branch 'for-linus-3.6' of git://dev.laptop.org/users/dilinger/linux-olpc
Linus Torvalds [Thu, 2 Aug 2012 18:52:39 +0000 (11:52 -0700)]
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

13 files changed:
arch/x86/include/asm/olpc.h
arch/x86/platform/olpc/olpc-xo1-pm.c
arch/x86/platform/olpc/olpc-xo1-sci.c
arch/x86/platform/olpc/olpc-xo15-sci.c
arch/x86/platform/olpc/olpc.c
drivers/net/wireless/libertas/if_usb.c
drivers/platform/Makefile
drivers/platform/olpc/Makefile [new file with mode: 0644]
drivers/platform/olpc/olpc-ec.c [new file with mode: 0644]
drivers/platform/x86/xo1-rfkill.c
drivers/power/olpc_battery.c
drivers/staging/olpc_dcon/olpc_dcon.c
include/linux/olpc-ec.h [new file with mode: 0644]

index 87bdbca..72f9adf 100644 (file)
@@ -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
index 0ce8616..d75582d 100644 (file)
@@ -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;
 }
 
index 04b8c73..63d4aa4 100644 (file)
@@ -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>
index 599be49..2fdca25 100644 (file)
@@ -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>
index a4bee53..2737608 100644 (file)
 #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>
 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;
 }
 
index 55a77e4..2798077 100644 (file)
@@ -10,6 +10,7 @@
 #include <linux/netdevice.h>
 #include <linux/slab.h>
 #include <linux/usb.h>
+#include <linux/olpc-ec.h>
 
 #ifdef CONFIG_OLPC
 #include <asm/olpc.h>
index 782953a..b17c16c 100644 (file)
@@ -3,3 +3,4 @@
 #
 
 obj-$(CONFIG_X86)              += x86/
+obj-$(CONFIG_OLPC)             += olpc/
diff --git a/drivers/platform/olpc/Makefile b/drivers/platform/olpc/Makefile
new file mode 100644 (file)
index 0000000..dc8b26b
--- /dev/null
@@ -0,0 +1,4 @@
+#
+# OLPC XO platform-specific drivers
+#
+obj-$(CONFIG_OLPC)             += olpc-ec.o
diff --git a/drivers/platform/olpc/olpc-ec.c b/drivers/platform/olpc/olpc-ec.c
new file mode 100644 (file)
index 0000000..0f9f859
--- /dev/null
@@ -0,0 +1,336 @@
+/*
+ * Generic driver for the OLPC Embedded Controller.
+ *
+ * Copyright (C) 2011-2012 One Laptop per Child Foundation.
+ *
+ * Licensed under the GPL v2 or later.
+ */
+#include <linux/completion.h>
+#include <linux/debugfs.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/olpc-ec.h>
+#include <asm/olpc.h>
+
+struct ec_cmd_desc {
+       u8 cmd;
+       u8 *inbuf, *outbuf;
+       size_t inlen, outlen;
+
+       int err;
+       struct completion finished;
+       struct list_head node;
+
+       void *priv;
+};
+
+struct olpc_ec_priv {
+       struct olpc_ec_driver *drv;
+       struct work_struct worker;
+       struct mutex cmd_lock;
+
+       /* Pending EC commands */
+       struct list_head cmd_q;
+       spinlock_t cmd_q_lock;
+
+       struct dentry *dbgfs_dir;
+
+       /*
+        * Running an EC command while suspending means we don't always finish
+        * the command before the machine suspends.  This means that the EC
+        * is expecting the command protocol to finish, but we after a period
+        * of time (while the OS is asleep) the EC times out and restarts its
+        * idle loop.  Meanwhile, the OS wakes up, thinks it's still in the
+        * middle of the command protocol, starts throwing random things at
+        * the EC... and everyone's uphappy.
+        */
+       bool suspended;
+};
+
+static struct olpc_ec_driver *ec_driver;
+static struct olpc_ec_priv *ec_priv;
+static void *ec_cb_arg;
+
+void olpc_ec_driver_register(struct olpc_ec_driver *drv, void *arg)
+{
+       ec_driver = drv;
+       ec_cb_arg = arg;
+}
+EXPORT_SYMBOL_GPL(olpc_ec_driver_register);
+
+static void olpc_ec_worker(struct work_struct *w)
+{
+       struct olpc_ec_priv *ec = container_of(w, struct olpc_ec_priv, worker);
+       struct ec_cmd_desc *desc = NULL;
+       unsigned long flags;
+
+       /* Grab the first pending command from the queue */
+       spin_lock_irqsave(&ec->cmd_q_lock, flags);
+       if (!list_empty(&ec->cmd_q)) {
+               desc = list_first_entry(&ec->cmd_q, struct ec_cmd_desc, node);
+               list_del(&desc->node);
+       }
+       spin_unlock_irqrestore(&ec->cmd_q_lock, flags);
+
+       /* Do we actually have anything to do? */
+       if (!desc)
+               return;
+
+       /* Protect the EC hw with a mutex; only run one cmd at a time */
+       mutex_lock(&ec->cmd_lock);
+       desc->err = ec_driver->ec_cmd(desc->cmd, desc->inbuf, desc->inlen,
+                       desc->outbuf, desc->outlen, ec_cb_arg);
+       mutex_unlock(&ec->cmd_lock);
+
+       /* Finished, wake up olpc_ec_cmd() */
+       complete(&desc->finished);
+
+       /* Run the worker thread again in case there are more cmds pending */
+       schedule_work(&ec->worker);
+}
+
+/*
+ * Throw a cmd descripter onto the list.  We now have SMP OLPC machines, so
+ * locking is pretty critical.
+ */
+static void queue_ec_descriptor(struct ec_cmd_desc *desc,
+               struct olpc_ec_priv *ec)
+{
+       unsigned long flags;
+
+       INIT_LIST_HEAD(&desc->node);
+
+       spin_lock_irqsave(&ec->cmd_q_lock, flags);
+       list_add_tail(&desc->node, &ec->cmd_q);
+       spin_unlock_irqrestore(&ec->cmd_q_lock, flags);
+
+       schedule_work(&ec->worker);
+}
+
+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;
+
+       /* Ensure a driver and ec hook have been registered */
+       if (WARN_ON(!ec_driver || !ec_driver->ec_cmd))
+               return -ENODEV;
+
+       if (!ec)
+               return -ENOMEM;
+
+       /* Suspending in the middle of a command hoses things really badly */
+       if (WARN_ON(ec->suspended))
+               return -EBUSY;
+
+       might_sleep();
+
+       desc.cmd = cmd;
+       desc.inbuf = inbuf;
+       desc.outbuf = outbuf;
+       desc.inlen = inlen;
+       desc.outlen = outlen;
+       desc.err = 0;
+       init_completion(&desc.finished);
+
+       queue_ec_descriptor(&desc, ec);
+
+       /* Timeouts must be handled in the platform-specific EC hook */
+       wait_for_completion(&desc.finished);
+
+       /* The worker thread dequeues the cmd; no need to do anything here */
+       return desc.err;
+}
+EXPORT_SYMBOL_GPL(olpc_ec_cmd);
+
+#ifdef CONFIG_DEBUG_FS
+
+/*
+ * debugfs support for "generic commands", to allow sending
+ * arbitrary EC commands from userspace.
+ */
+
+#define EC_MAX_CMD_ARGS (5 + 1)                /* cmd byte + 5 args */
+#define EC_MAX_CMD_REPLY (8)
+
+static DEFINE_MUTEX(ec_dbgfs_lock);
+static unsigned char ec_dbgfs_resp[EC_MAX_CMD_REPLY];
+static unsigned int ec_dbgfs_resp_bytes;
+
+static ssize_t ec_dbgfs_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_dbgfs_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_dbgfs_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_dbgfs_resp_bytes > EC_MAX_CMD_REPLY) {
+               /* reset to prevent overflow on read */
+               ec_dbgfs_resp_bytes = 0;
+
+               pr_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];
+
+       pr_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_dbgfs_resp_bytes);
+
+       olpc_ec_cmd(ec_cmd[0], (ec_cmd_bytes == 0) ? NULL : &ec_cmd[1],
+                       ec_cmd_bytes, ec_dbgfs_resp, ec_dbgfs_resp_bytes);
+
+       pr_debug("olpc-ec: response %02x %02x %02x %02x %02x %02x %02x %02x (%d bytes expected)\n",
+                       ec_dbgfs_resp[0], ec_dbgfs_resp[1], ec_dbgfs_resp[2],
+                       ec_dbgfs_resp[3], ec_dbgfs_resp[4], ec_dbgfs_resp[5],
+                       ec_dbgfs_resp[6], ec_dbgfs_resp[7],
+                       ec_dbgfs_resp_bytes);
+
+out:
+       mutex_unlock(&ec_dbgfs_lock);
+       return size;
+}
+
+static ssize_t ec_dbgfs_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_dbgfs_lock);
+       rp = respbuf;
+       rp += sprintf(rp, "%02x", ec_dbgfs_resp[0]);
+       for (i = 1; i < ec_dbgfs_resp_bytes; i++)
+               rp += sprintf(rp, ", %02x", ec_dbgfs_resp[i]);
+       mutex_unlock(&ec_dbgfs_lock);
+       rp += sprintf(rp, "\n");
+
+       r = rp - respbuf;
+       return simple_read_from_buffer(buf, size, ppos, respbuf, r);
+}
+
+static const struct file_operations ec_dbgfs_ops = {
+       .write = ec_dbgfs_cmd_write,
+       .read = ec_dbgfs_cmd_read,
+};
+
+static struct dentry *olpc_ec_setup_debugfs(void)
+{
+       struct dentry *dbgfs_dir;
+
+       dbgfs_dir = debugfs_create_dir("olpc-ec", NULL);
+       if (IS_ERR_OR_NULL(dbgfs_dir))
+               return NULL;
+
+       debugfs_create_file("cmd", 0600, dbgfs_dir, NULL, &ec_dbgfs_ops);
+
+       return dbgfs_dir;
+}
+
+#else
+
+static struct dentry *olpc_ec_setup_debugfs(void)
+{
+       return NULL;
+}
+
+#endif /* CONFIG_DEBUG_FS */
+
+static int olpc_ec_probe(struct platform_device *pdev)
+{
+       struct olpc_ec_priv *ec;
+       int err;
+
+       if (!ec_driver)
+               return -ENODEV;
+
+       ec = kzalloc(sizeof(*ec), GFP_KERNEL);
+       if (!ec)
+               return -ENOMEM;
+
+       ec->drv = ec_driver;
+       INIT_WORK(&ec->worker, olpc_ec_worker);
+       mutex_init(&ec->cmd_lock);
+
+       INIT_LIST_HEAD(&ec->cmd_q);
+       spin_lock_init(&ec->cmd_q_lock);
+
+       ec_priv = ec;
+       platform_set_drvdata(pdev, ec);
+
+       err = ec_driver->probe ? ec_driver->probe(pdev) : 0;
+       if (err) {
+               ec_priv = NULL;
+               kfree(ec);
+       } else {
+               ec->dbgfs_dir = olpc_ec_setup_debugfs();
+       }
+
+       return err;
+}
+
+static int olpc_ec_suspend(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct olpc_ec_priv *ec = platform_get_drvdata(pdev);
+       int err = 0;
+
+       if (ec_driver->suspend)
+               err = ec_driver->suspend(pdev);
+       if (!err)
+               ec->suspended = true;
+
+       return err;
+}
+
+static int olpc_ec_resume(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct olpc_ec_priv *ec = platform_get_drvdata(pdev);
+
+       ec->suspended = false;
+       return ec_driver->resume ? ec_driver->resume(pdev) : 0;
+}
+
+static const struct dev_pm_ops olpc_ec_pm_ops = {
+       .suspend_late = olpc_ec_suspend,
+       .resume_early = olpc_ec_resume,
+};
+
+static struct platform_driver olpc_ec_plat_driver = {
+       .probe = olpc_ec_probe,
+       .driver = {
+               .name = "olpc-ec",
+               .pm = &olpc_ec_pm_ops,
+       },
+};
+
+static int __init olpc_ec_init_module(void)
+{
+       return platform_driver_register(&olpc_ec_plat_driver);
+}
+
+module_init(olpc_ec_init_module);
+
+MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
+MODULE_LICENSE("GPL");
index b57ad86..1da13ed 100644 (file)
@@ -12,8 +12,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/rfkill.h>
-
-#include <asm/olpc.h>
+#include <linux/olpc-ec.h>
 
 static bool card_blocked;
 
index 55b10b8..a89a41a 100644 (file)
@@ -17,6 +17,7 @@
 #include <linux/power_supply.h>
 #include <linux/jiffies.h>
 #include <linux/sched.h>
+#include <linux/olpc-ec.h>
 #include <asm/olpc.h>
 
 
index 992275c..2c4bd74 100644 (file)
@@ -27,6 +27,7 @@
 #include <linux/uaccess.h>
 #include <linux/ctype.h>
 #include <linux/reboot.h>
+#include <linux/olpc-ec.h>
 #include <asm/tsc.h>
 #include <asm/olpc.h>
 
diff --git a/include/linux/olpc-ec.h b/include/linux/olpc-ec.h
new file mode 100644 (file)
index 0000000..5bb6e76
--- /dev/null
@@ -0,0 +1,41 @@
+#ifndef _LINUX_OLPC_EC_H
+#define _LINUX_OLPC_EC_H
+
+/* XO-1 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
+
+struct platform_device;
+
+struct olpc_ec_driver {
+       int (*probe)(struct platform_device *);
+       int (*suspend)(struct platform_device *);
+       int (*resume)(struct platform_device *);
+
+       int (*ec_cmd)(u8, u8 *, size_t, u8 *, size_t, void *);
+};
+
+#ifdef CONFIG_OLPC
+
+extern void olpc_ec_driver_register(struct olpc_ec_driver *drv, void *arg);
+
+extern int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf,
+               size_t outlen);
+
+#else
+
+static inline int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf,
+               size_t outlen) { return -ENODEV; }
+
+#endif /* CONFIG_OLPC */
+
+#endif /* _LINUX_OLPC_EC_H */