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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * ideapad-laptop.h - Lenovo IdeaPad ACPI Extras * * Copyright © 2010 Intel Corporation * Copyright © 2010 David Woodhouse <dwmw2@infradead.org> */ #ifndef _IDEAPAD_LAPTOP_H_ #define _IDEAPAD_LAPTOP_H_ #include <linux/acpi.h> #include <linux/jiffies.h> #include <linux/errno.h> enum { VPCCMD_R_VPC1 = 0x10, VPCCMD_R_BL_MAX, VPCCMD_R_BL, VPCCMD_W_BL, VPCCMD_R_WIFI, VPCCMD_W_WIFI, VPCCMD_R_BT, VPCCMD_W_BT, VPCCMD_R_BL_POWER, VPCCMD_R_NOVO, VPCCMD_R_VPC2, VPCCMD_R_TOUCHPAD, VPCCMD_W_TOUCHPAD, VPCCMD_R_CAMERA, VPCCMD_W_CAMERA, VPCCMD_R_3G, VPCCMD_W_3G, VPCCMD_R_ODD, /* 0x21 */ VPCCMD_W_FAN, VPCCMD_R_RF, VPCCMD_W_RF, VPCCMD_W_YMC = 0x2A, VPCCMD_R_FAN = 0x2B, VPCCMD_R_SPECIAL_BUTTONS = 0x31, VPCCMD_W_BL_POWER = 0x33, }; static inline int eval_int_with_arg(acpi_handle handle, const char *name, unsigned long arg, unsigned long *res) { struct acpi_object_list params; unsigned long long result; union acpi_object in_obj; acpi_status status; params.count = 1; params.pointer = &in_obj; in_obj.type = ACPI_TYPE_INTEGER; in_obj.integer.value = arg; status = acpi_evaluate_integer(handle, (char *)name, ¶ms, &result); if (ACPI_FAILURE(status)) return -EIO; if (res) *res = result; return 0; } static inline int eval_vpcr(acpi_handle handle, unsigned long cmd, unsigned long *res) { return eval_int_with_arg(handle, "VPCR", cmd, res); } static inline int eval_vpcw(acpi_handle handle, unsigned long cmd, unsigned long 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", ¶ms, NULL); if (ACPI_FAILURE(status)) return -EIO; return 0; } #define IDEAPAD_EC_TIMEOUT 200 /* in ms */ static inline int read_ec_data(acpi_handle handle, unsigned long cmd, unsigned long *data) { unsigned long end_jiffies, val; int err; err = eval_vpcw(handle, 1, cmd); if (err) return err; end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1; while (time_before(jiffies, end_jiffies)) { schedule(); err = eval_vpcr(handle, 1, &val); if (err) return err; if (val == 0) return eval_vpcr(handle, 0, data); } acpi_handle_err(handle, "timeout in %s\n", __func__); return -ETIMEDOUT; } static inline int write_ec_cmd(acpi_handle handle, unsigned long cmd, unsigned long data) { unsigned long end_jiffies, val; int err; err = eval_vpcw(handle, 0, data); if (err) return err; err = eval_vpcw(handle, 1, cmd); if (err) return err; end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1; while (time_before(jiffies, end_jiffies)) { schedule(); err = eval_vpcr(handle, 1, &val); if (err) return err; if (val == 0) return 0; } acpi_handle_err(handle, "timeout in %s\n", __func__); return -ETIMEDOUT; } #undef IDEAPAD_EC_TIMEOUT #endif /* !_IDEAPAD_LAPTOP_H_ */ |