153 lines
3.0 KiB
C
153 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* ideapad-laptop.h - 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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#ifndef _IDEAPAD_LAPTOP_H_
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#define _IDEAPAD_LAPTOP_H_
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#include <linux/acpi.h>
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#include <linux/jiffies.h>
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#include <linux/errno.h>
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enum {
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VPCCMD_R_VPC1 = 0x10,
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VPCCMD_R_BL_MAX,
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VPCCMD_R_BL,
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VPCCMD_W_BL,
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VPCCMD_R_WIFI,
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VPCCMD_W_WIFI,
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VPCCMD_R_BT,
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VPCCMD_W_BT,
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VPCCMD_R_BL_POWER,
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VPCCMD_R_NOVO,
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VPCCMD_R_VPC2,
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VPCCMD_R_TOUCHPAD,
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VPCCMD_W_TOUCHPAD,
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VPCCMD_R_CAMERA,
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VPCCMD_W_CAMERA,
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VPCCMD_R_3G,
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VPCCMD_W_3G,
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VPCCMD_R_ODD, /* 0x21 */
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VPCCMD_W_FAN,
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VPCCMD_R_RF,
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VPCCMD_W_RF,
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VPCCMD_W_YMC = 0x2A,
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VPCCMD_R_FAN = 0x2B,
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VPCCMD_R_SPECIAL_BUTTONS = 0x31,
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VPCCMD_W_BL_POWER = 0x33,
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};
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static inline int eval_int_with_arg(acpi_handle handle, const char *name, unsigned long arg, unsigned long *res)
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{
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struct acpi_object_list params;
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unsigned long long result;
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union acpi_object in_obj;
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acpi_status status;
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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 = arg;
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status = acpi_evaluate_integer(handle, (char *)name, ¶ms, &result);
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if (ACPI_FAILURE(status))
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return -EIO;
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if (res)
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*res = result;
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return 0;
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}
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static inline int eval_vpcr(acpi_handle handle, unsigned long cmd, unsigned long *res)
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{
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return eval_int_with_arg(handle, "VPCR", cmd, res);
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}
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static inline int eval_vpcw(acpi_handle handle, unsigned long cmd, unsigned long 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 (ACPI_FAILURE(status))
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return -EIO;
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return 0;
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}
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#define IDEAPAD_EC_TIMEOUT 200 /* in ms */
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static inline int read_ec_data(acpi_handle handle, unsigned long cmd, unsigned long *data)
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{
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unsigned long end_jiffies, val;
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int err;
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err = eval_vpcw(handle, 1, cmd);
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if (err)
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return err;
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end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
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while (time_before(jiffies, end_jiffies)) {
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schedule();
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err = eval_vpcr(handle, 1, &val);
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if (err)
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return err;
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if (val == 0)
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return eval_vpcr(handle, 0, data);
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}
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acpi_handle_err(handle, "timeout in %s\n", __func__);
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return -ETIMEDOUT;
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}
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static inline int write_ec_cmd(acpi_handle handle, unsigned long cmd, unsigned long data)
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{
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unsigned long end_jiffies, val;
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int err;
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err = eval_vpcw(handle, 0, data);
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if (err)
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return err;
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err = eval_vpcw(handle, 1, cmd);
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if (err)
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return err;
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end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
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while (time_before(jiffies, end_jiffies)) {
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schedule();
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err = eval_vpcr(handle, 1, &val);
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if (err)
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return err;
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if (val == 0)
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return 0;
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}
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acpi_handle_err(handle, "timeout in %s\n", __func__);
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return -ETIMEDOUT;
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}
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#undef IDEAPAD_EC_TIMEOUT
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#endif /* !_IDEAPAD_LAPTOP_H_ */
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