ideapad: Change the driver name to ideapad-laptop

Since the platform drivers doing more for laptops than just using specific
ACPI device. It will be good to change the name from *_acpi to *-laptop.

Reference: http://lkml.org/lkml/2010/8/14/154

Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 382 insertions, 0 deletions

diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
new file mode 100644
index 000000000000..e9f7395efc3a
--- /dev/null
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -0,0 +1,382 @@
+/*
+ *  ideapad_acpi.c - Lenovo IdeaPad ACPI Extras
+ *
+ *  Copyright © 2010 Intel Corporation
+ *  Copyright © 2010 David Woodhouse <dwmw2@infradead.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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ *  02110-1301, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include <linux/rfkill.h>
+
+#define IDEAPAD_DEV_CAMERA      0
+#define IDEAPAD_DEV_WLAN        1
+#define IDEAPAD_DEV_BLUETOOTH   2
+#define IDEAPAD_DEV_3G          3
+#define IDEAPAD_DEV_KILLSW      4
+
+struct ideapad_private {
+        acpi_handle handle;
+        struct rfkill *rfk[5];
+} *ideapad_priv;
+
+static struct {
+        char *name;
+        int cfgbit;
+        int opcode;
+        int type;
+} ideapad_rfk_data[] = {
+        { "ideapad_camera",     19, 0x1E, NUM_RFKILL_TYPES },
+        { "ideapad_wlan",       18, 0x15, RFKILL_TYPE_WLAN },
+        { "ideapad_bluetooth",  16, 0x17, RFKILL_TYPE_BLUETOOTH },
+        { "ideapad_3g",         17, 0x20, RFKILL_TYPE_WWAN },
+        { "ideapad_killsw",     0,  0,    RFKILL_TYPE_WLAN }
+};
+
+/*
+ * ACPI Helpers
+ */
+#define IDEAPAD_EC_TIMEOUT (100) /* in ms */
+
+static int read_method_int(acpi_handle handle, const char *method, int *val)
+{
+        acpi_status status;
+        unsigned long long result;
+
+        status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
+        if (ACPI_FAILURE(status)) {
+                *val = -1;
+                return -1;
+        } else {
+                *val = result;
+                return 0;
+        }
+}
+
+static int method_vpcr(acpi_handle handle, int cmd, int *ret)
+{
+        acpi_status status;
+        unsigned long long result;
+        struct acpi_object_list params;
+        union acpi_object in_obj;
+
+        params.count = 1;
+        params.pointer = &in_obj;
+        in_obj.type = ACPI_TYPE_INTEGER;
+        in_obj.integer.value = cmd;
+
+        status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
+
+        if (ACPI_FAILURE(status)) {
+                *ret = -1;
+                return -1;
+        } else {
+                *ret = result;
+                return 0;
+        }
+}
+
+static int method_vpcw(acpi_handle handle, int cmd, int data)
+{
+        struct acpi_object_list params;
+        union acpi_object in_obj[2];
+        acpi_status status;
+
+        params.count = 2;
+        params.pointer = in_obj;
+        in_obj[0].type = ACPI_TYPE_INTEGER;
+        in_obj[0].integer.value = cmd;
+        in_obj[1].type = ACPI_TYPE_INTEGER;
+        in_obj[1].integer.value = data;
+
+        status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
+        if (status != AE_OK)
+                return -1;
+        return 0;
+}
+
+static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
+{
+        int val;
+        unsigned long int end_jiffies;
+
+        if (method_vpcw(handle, 1, cmd))
+                return -1;
+
+        for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
+             time_before(jiffies, end_jiffies);) {
+                schedule();
+                if (method_vpcr(handle, 1, &val))
+                        return -1;
+                if (val == 0) {
+                        if (method_vpcr(handle, 0, &val))
+                                return -1;
+                        *data = val;
+                        return 0;
+                }
+        }
+        pr_err("timeout in read_ec_cmd\n");
+        return -1;
+}
+
+static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
+{
+        int val;
+        unsigned long int end_jiffies;
+
+        if (method_vpcw(handle, 0, data))
+                return -1;
+        if (method_vpcw(handle, 1, cmd))
+                return -1;
+
+        for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
+             time_before(jiffies, end_jiffies);) {
+                schedule();
+                if (method_vpcr(handle, 1, &val))
+                        return -1;
+                if (val == 0)
+                        return 0;
+        }
+        pr_err("timeout in write_ec_cmd\n");
+        return -1;
+}
+/* the above is ACPI helpers */
+
+static ssize_t show_ideapad_cam(struct device *dev,
+                                struct device_attribute *attr,
+                                char *buf)
+{
+        struct ideapad_private *priv = dev_get_drvdata(dev);
+        acpi_handle handle = priv->handle;
+        unsigned long result;
+
+        if (read_ec_data(handle, 0x1D, &result))
+                return sprintf(buf, "-1\n");
+        return sprintf(buf, "%lu\n", result);
+}
+
+static ssize_t store_ideapad_cam(struct device *dev,
+                                 struct device_attribute *attr,
+                                 const char *buf, size_t count)
+{
+        struct ideapad_private *priv = dev_get_drvdata(dev);
+        acpi_handle handle = priv->handle;
+        int ret, state;
+
+        if (!count)
+                return 0;
+        if (sscanf(buf, "%i", &state) != 1)
+                return -EINVAL;
+        ret = write_ec_cmd(handle, 0x1E, state);
+        if (ret < 0)
+                return ret;
+        return count;
+}
+
+static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
+
+static int ideapad_rfk_set(void *data, bool blocked)
+{
+        int device = (unsigned long)data;
+
+        if (device == IDEAPAD_DEV_KILLSW)
+                return -EINVAL;
+
+        return write_ec_cmd(ideapad_priv->handle,
+                            ideapad_rfk_data[device].opcode,
+                            !blocked);
+}
+
+static struct rfkill_ops ideapad_rfk_ops = {
+        .set_block = ideapad_rfk_set,
+};
+
+static void ideapad_sync_rfk_state(struct acpi_device *adevice)
+{
+        struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
+        acpi_handle handle = priv->handle;
+        unsigned long hw_blocked;
+        int i;
+
+        if (read_ec_data(handle, 0x23, &hw_blocked))
+                return;
+        hw_blocked = !hw_blocked;
+
+        for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
+                if (priv->rfk[i])
+                        rfkill_set_hw_state(priv->rfk[i], hw_blocked);
+}
+
+static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
+{
+        struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
+        int ret;
+        unsigned long sw_blocked;
+
+        priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
+                                      ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
+                                      (void *)(long)dev);
+        if (!priv->rfk[dev])
+                return -ENOMEM;
+
+        if (read_ec_data(ideapad_priv->handle, ideapad_rfk_data[dev].opcode-1,
+                         &sw_blocked)) {
+                rfkill_init_sw_state(priv->rfk[dev], 0);
+        } else {
+                sw_blocked = !sw_blocked;
+                rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
+        }
+
+        ret = rfkill_register(priv->rfk[dev]);
+        if (ret) {
+                rfkill_destroy(priv->rfk[dev]);
+                return ret;
+        }
+        return 0;
+}
+
+static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
+{
+        struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
+
+        if (!priv->rfk[dev])
+                return;
+
+        rfkill_unregister(priv->rfk[dev]);
+        rfkill_destroy(priv->rfk[dev]);
+}
+
+static const struct acpi_device_id ideapad_device_ids[] = {
+        { "VPC2004", 0},
+        { "", 0},
+};
+MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
+
+static int ideapad_acpi_add(struct acpi_device *adevice)
+{
+        int i, cfg;
+        int devs_present[5];
+        struct ideapad_private *priv;
+
+        if (read_method_int(adevice->handle, "_CFG", &cfg))
+                return -ENODEV;
+
+        for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
+                if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
+                        devs_present[i] = 1;
+                else
+                        devs_present[i] = 0;
+        }
+
+        /* The hardware switch is always present */
+        devs_present[IDEAPAD_DEV_KILLSW] = 1;
+
+        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+        if (!priv)
+                return -ENOMEM;
+
+        if (devs_present[IDEAPAD_DEV_CAMERA]) {
+                int ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
+                if (ret) {
+                        kfree(priv);
+                        return ret;
+                }
+        }
+
+        priv->handle = adevice->handle;
+        dev_set_drvdata(&adevice->dev, priv);
+        ideapad_priv = priv;
+        for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
+                if (!devs_present[i])
+                        continue;
+
+                ideapad_register_rfkill(adevice, i);
+        }
+        ideapad_sync_rfk_state(adevice);
+        return 0;
+}
+
+static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
+{
+        struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
+        int i;
+
+        device_remove_file(&adevice->dev, &dev_attr_camera_power);
+
+        for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
+                ideapad_unregister_rfkill(adevice, i);
+
+        dev_set_drvdata(&adevice->dev, NULL);
+        kfree(priv);
+        return 0;
+}
+
+static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
+{
+        acpi_handle handle = adevice->handle;
+        unsigned long vpc1, vpc2, vpc_bit;
+
+        if (read_ec_data(handle, 0x10, &vpc1))
+                return;
+        if (read_ec_data(handle, 0x1A, &vpc2))
+                return;
+
+        vpc1 = (vpc2 << 8) | vpc1;
+        for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
+                if (test_bit(vpc_bit, &vpc1)) {
+                        if (vpc_bit == 9)
+                                ideapad_sync_rfk_state(adevice);
+                }
+        }
+}
+
+static struct acpi_driver ideapad_acpi_driver = {
+        .name = "ideapad_acpi",
+        .class = "IdeaPad",
+        .ids = ideapad_device_ids,
+        .ops.add = ideapad_acpi_add,
+        .ops.remove = ideapad_acpi_remove,
+        .ops.notify = ideapad_acpi_notify,
+        .owner = THIS_MODULE,
+};
+
+
+static int __init ideapad_acpi_module_init(void)
+{
+        acpi_bus_register_driver(&ideapad_acpi_driver);
+
+        return 0;
+}
+
+
+static void __exit ideapad_acpi_module_exit(void)
+{
+        acpi_bus_unregister_driver(&ideapad_acpi_driver);
+
+}
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("IdeaPad ACPI Extras");
+MODULE_LICENSE("GPL");
+
+module_init(ideapad_acpi_module_init);
+module_exit(ideapad_acpi_module_exit);