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path: root/drivers/platform/x86/ideapad-laptop.c
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Diffstat (limited to 'drivers/platform/x86/ideapad-laptop.c')
-rw-r--r--drivers/platform/x86/ideapad-laptop.c394
1 files changed, 394 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..5ff12205aa6b
--- /dev/null
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -0,0 +1,394 @@
+/*
+ * 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 }
+};
+
+static bool no_bt_rfkill;
+module_param(no_bt_rfkill, bool, 0444);
+MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
+
+/*
+ * 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;
+
+ if (no_bt_rfkill &&
+ (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
+ /* Force to enable bluetooth when no_bt_rfkill=1 */
+ write_ec_cmd(ideapad_priv->handle,
+ ideapad_rfk_data[dev].opcode, 1);
+ return 0;
+ }
+
+ 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);