2010-08-10 22:44:05 +00:00
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/*
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* ideapad_acpi.c - Lenovo IdeaPad ACPI Extras
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*
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* Copyright © 2010 Intel Corporation
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* Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#include <linux/rfkill.h>
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#define IDEAPAD_DEV_CAMERA 0
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#define IDEAPAD_DEV_WLAN 1
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#define IDEAPAD_DEV_BLUETOOTH 2
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#define IDEAPAD_DEV_3G 3
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#define IDEAPAD_DEV_KILLSW 4
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2010-08-11 16:59:35 +00:00
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struct ideapad_private {
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2010-10-01 07:39:40 +00:00
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acpi_handle handle;
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2010-08-11 16:59:35 +00:00
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struct rfkill *rfk[5];
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2010-08-10 22:44:05 +00:00
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};
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2010-08-11 16:59:35 +00:00
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static struct {
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char *name;
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2010-10-01 07:39:29 +00:00
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int cfgbit;
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2010-08-11 16:59:35 +00:00
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int type;
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} ideapad_rfk_data[] = {
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2010-10-01 07:39:29 +00:00
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{ "ideapad_camera", 19, NUM_RFKILL_TYPES },
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{ "ideapad_wlan", 18, RFKILL_TYPE_WLAN },
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{ "ideapad_bluetooth", 16, RFKILL_TYPE_BLUETOOTH },
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{ "ideapad_3g", 17, RFKILL_TYPE_WWAN },
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{ "ideapad_killsw", 0, RFKILL_TYPE_WLAN }
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2010-08-10 22:44:05 +00:00
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};
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2010-10-01 07:38:46 +00:00
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/*
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* ACPI Helpers
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*/
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#define IDEAPAD_EC_TIMEOUT (100) /* in ms */
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static int read_method_int(acpi_handle handle, const char *method, int *val)
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{
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acpi_status status;
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unsigned long long result;
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status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
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if (ACPI_FAILURE(status)) {
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*val = -1;
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return -1;
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} else {
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*val = result;
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return 0;
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}
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}
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static int method_vpcr(acpi_handle handle, int cmd, int *ret)
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{
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acpi_status status;
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unsigned long long result;
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struct acpi_object_list params;
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union acpi_object in_obj;
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params.count = 1;
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params.pointer = &in_obj;
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in_obj.type = ACPI_TYPE_INTEGER;
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in_obj.integer.value = cmd;
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status = acpi_evaluate_integer(handle, "VPCR", ¶ms, &result);
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if (ACPI_FAILURE(status)) {
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*ret = -1;
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return -1;
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} else {
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*ret = result;
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return 0;
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}
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}
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static int method_vpcw(acpi_handle handle, int cmd, int data)
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{
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struct acpi_object_list params;
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union acpi_object in_obj[2];
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acpi_status status;
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params.count = 2;
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params.pointer = in_obj;
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in_obj[0].type = ACPI_TYPE_INTEGER;
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in_obj[0].integer.value = cmd;
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in_obj[1].type = ACPI_TYPE_INTEGER;
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in_obj[1].integer.value = data;
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status = acpi_evaluate_object(handle, "VPCW", ¶ms, NULL);
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if (status != AE_OK)
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return -1;
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return 0;
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}
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static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
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{
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int val;
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unsigned long int end_jiffies;
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if (method_vpcw(handle, 1, cmd))
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return -1;
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for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
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time_before(jiffies, end_jiffies);) {
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schedule();
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if (method_vpcr(handle, 1, &val))
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return -1;
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if (val == 0) {
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if (method_vpcr(handle, 0, &val))
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return -1;
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*data = val;
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return 0;
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}
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}
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pr_err("timeout in read_ec_cmd\n");
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return -1;
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}
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static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
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{
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int val;
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unsigned long int end_jiffies;
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if (method_vpcw(handle, 0, data))
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return -1;
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if (method_vpcw(handle, 1, cmd))
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return -1;
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for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
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time_before(jiffies, end_jiffies);) {
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schedule();
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if (method_vpcr(handle, 1, &val))
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return -1;
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if (val == 0)
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return 0;
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}
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pr_err("timeout in write_ec_cmd\n");
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return -1;
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}
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/* the above is ACPI helpers */
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2010-08-10 22:44:05 +00:00
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static int ideapad_dev_set_state(int device, int state)
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{
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acpi_status status;
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union acpi_object in_params[2];
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struct acpi_object_list input = { 2, in_params };
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in_params[0].type = ACPI_TYPE_INTEGER;
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in_params[0].integer.value = device + 1;
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in_params[1].type = ACPI_TYPE_INTEGER;
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in_params[1].integer.value = state;
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status = acpi_evaluate_object(NULL, "\\_SB_.SECN", &input, NULL);
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if (ACPI_FAILURE(status)) {
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printk(KERN_WARNING "IdeaPAD \\_SB_.SECN method failed %d\n", status);
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return -ENODEV;
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}
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return 0;
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}
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static ssize_t show_ideapad_cam(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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2010-10-01 07:39:40 +00:00
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struct ideapad_private *priv = dev_get_drvdata(dev);
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acpi_handle handle = priv->handle;
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unsigned long result;
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2010-08-10 22:44:05 +00:00
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2010-10-01 07:39:40 +00:00
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if (read_ec_data(handle, 0x1D, &result))
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return sprintf(buf, "-1\n");
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return sprintf(buf, "%lu\n", result);
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2010-08-10 22:44:05 +00:00
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}
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static ssize_t store_ideapad_cam(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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2010-10-01 07:39:40 +00:00
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struct ideapad_private *priv = dev_get_drvdata(dev);
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acpi_handle handle = priv->handle;
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2010-08-10 22:44:05 +00:00
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int ret, state;
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if (!count)
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return 0;
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if (sscanf(buf, "%i", &state) != 1)
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return -EINVAL;
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2010-10-01 07:39:40 +00:00
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ret = write_ec_cmd(handle, 0x1E, state);
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2010-08-10 22:44:05 +00:00
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if (ret < 0)
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return ret;
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return count;
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}
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static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
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static int ideapad_rfk_set(void *data, bool blocked)
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{
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int device = (unsigned long)data;
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if (device == IDEAPAD_DEV_KILLSW)
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return -EINVAL;
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return ideapad_dev_set_state(device, !blocked);
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}
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static struct rfkill_ops ideapad_rfk_ops = {
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.set_block = ideapad_rfk_set,
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};
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2010-08-11 16:59:35 +00:00
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static void ideapad_sync_rfk_state(struct acpi_device *adevice)
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2010-08-10 22:44:05 +00:00
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{
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2010-08-11 16:59:35 +00:00
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struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
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2010-10-01 07:39:49 +00:00
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acpi_handle handle = priv->handle;
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unsigned long hw_blocked;
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2010-08-10 22:44:05 +00:00
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int i;
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2010-10-01 07:39:49 +00:00
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if (read_ec_data(handle, 0x23, &hw_blocked))
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2010-08-10 22:44:05 +00:00
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return;
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2010-10-01 07:39:49 +00:00
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hw_blocked = !hw_blocked;
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2010-08-10 22:44:05 +00:00
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2010-10-01 07:39:49 +00:00
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for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
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2010-08-11 16:59:35 +00:00
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if (priv->rfk[i])
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2010-10-01 07:39:49 +00:00
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rfkill_set_hw_state(priv->rfk[i], hw_blocked);
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2010-08-10 22:44:05 +00:00
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}
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2010-08-11 16:59:35 +00:00
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static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
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2010-08-10 22:44:05 +00:00
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{
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2010-08-11 16:59:35 +00:00
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struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
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2010-08-10 22:44:05 +00:00
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int ret;
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2010-10-01 07:39:49 +00:00
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unsigned long sw_blocked;
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2010-08-10 22:44:05 +00:00
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2010-10-01 07:39:49 +00:00
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priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
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ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
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2010-08-11 16:59:35 +00:00
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(void *)(long)dev);
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if (!priv->rfk[dev])
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2010-08-10 22:44:05 +00:00
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return -ENOMEM;
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2010-10-01 07:39:49 +00:00
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if (read_ec_data(ideapad_priv->handle, ideapad_rfk_data[dev].opcode-1,
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&sw_blocked)) {
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rfkill_init_sw_state(priv->rfk[dev], 0);
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} else {
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sw_blocked = !sw_blocked;
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rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
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}
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2010-08-11 16:59:35 +00:00
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ret = rfkill_register(priv->rfk[dev]);
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2010-08-10 22:44:05 +00:00
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if (ret) {
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2010-08-11 16:59:35 +00:00
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rfkill_destroy(priv->rfk[dev]);
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2010-08-10 22:44:05 +00:00
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return ret;
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}
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return 0;
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}
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2010-08-11 16:59:35 +00:00
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static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
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2010-08-10 22:44:05 +00:00
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{
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2010-08-11 16:59:35 +00:00
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struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
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if (!priv->rfk[dev])
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2010-08-10 22:44:05 +00:00
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return;
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2010-08-11 16:59:35 +00:00
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rfkill_unregister(priv->rfk[dev]);
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rfkill_destroy(priv->rfk[dev]);
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2010-08-10 22:44:05 +00:00
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}
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static const struct acpi_device_id ideapad_device_ids[] = {
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{ "VPC2004", 0},
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{ "", 0},
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};
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MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
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2010-08-11 16:59:35 +00:00
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static int ideapad_acpi_add(struct acpi_device *adevice)
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2010-08-10 22:44:05 +00:00
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{
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2010-10-01 07:39:14 +00:00
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int i, cfg;
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2010-08-10 22:44:05 +00:00
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int devs_present[5];
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2010-08-11 16:59:35 +00:00
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struct ideapad_private *priv;
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2010-08-10 22:44:05 +00:00
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2010-10-01 07:39:14 +00:00
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if (read_method_int(adevice->handle, "_CFG", &cfg))
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return -ENODEV;
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2010-08-10 22:44:05 +00:00
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for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
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2010-10-01 07:39:29 +00:00
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if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
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devs_present[i] = 1;
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else
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devs_present[i] = 0;
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2010-08-10 22:44:05 +00:00
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}
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/* The hardware switch is always present */
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devs_present[IDEAPAD_DEV_KILLSW] = 1;
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2010-08-11 16:59:35 +00:00
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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2010-08-10 22:44:05 +00:00
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if (devs_present[IDEAPAD_DEV_CAMERA]) {
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2010-08-11 16:59:35 +00:00
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int ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
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if (ret) {
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kfree(priv);
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2010-08-10 22:44:05 +00:00
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return ret;
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2010-08-11 16:59:35 +00:00
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}
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2010-08-10 22:44:05 +00:00
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}
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2010-10-01 07:39:40 +00:00
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priv->handle = adevice->handle;
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2010-08-11 16:59:35 +00:00
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dev_set_drvdata(&adevice->dev, priv);
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2010-08-10 22:44:05 +00:00
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for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
|
|
|
|
if (!devs_present[i])
|
|
|
|
continue;
|
|
|
|
|
2010-08-11 16:59:35 +00:00
|
|
|
ideapad_register_rfkill(adevice, i);
|
2010-08-10 22:44:05 +00:00
|
|
|
}
|
2010-08-11 16:59:35 +00:00
|
|
|
ideapad_sync_rfk_state(adevice);
|
2010-08-10 22:44:05 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-08-11 16:59:35 +00:00
|
|
|
static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
|
2010-08-10 22:44:05 +00:00
|
|
|
{
|
2010-08-11 16:59:35 +00:00
|
|
|
struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
|
2010-08-10 22:44:05 +00:00
|
|
|
int i;
|
2010-08-11 16:59:35 +00:00
|
|
|
|
|
|
|
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);
|
2010-08-10 22:44:05 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-08-11 16:59:35 +00:00
|
|
|
static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
|
2010-08-10 22:44:05 +00:00
|
|
|
{
|
2010-10-01 07:39:05 +00:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
}
|
2010-08-10 22:44:05 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
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);
|