280 lines
7.4 KiB
C
280 lines
7.4 KiB
C
/*
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* Copyright 2011 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include "mxms.h"
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#include <core/option.h>
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#include <subdev/bios.h>
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#include <subdev/bios/mxm.h>
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#include <subdev/i2c.h>
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static bool
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mxm_shadow_rom_fetch(struct nvkm_i2c_bus *bus, u8 addr,
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u8 offset, u8 size, u8 *data)
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{
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struct i2c_msg msgs[] = {
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{ .addr = addr, .flags = 0, .len = 1, .buf = &offset },
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{ .addr = addr, .flags = I2C_M_RD, .len = size, .buf = data, },
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};
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return i2c_transfer(&bus->i2c, msgs, 2) == 2;
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}
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static bool
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mxm_shadow_rom(struct nvkm_mxm *mxm, u8 version)
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{
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struct nvkm_device *device = mxm->subdev.device;
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struct nvkm_bios *bios = device->bios;
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struct nvkm_i2c *i2c = device->i2c;
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struct nvkm_i2c_bus *bus = NULL;
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u8 i2cidx, mxms[6], addr, size;
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i2cidx = mxm_ddc_map(bios, 1 /* LVDS_DDC */) & 0x0f;
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if (i2cidx < 0x0f)
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bus = nvkm_i2c_bus_find(i2c, i2cidx);
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if (!bus)
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return false;
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addr = 0x54;
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if (!mxm_shadow_rom_fetch(bus, addr, 0, 6, mxms)) {
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addr = 0x56;
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if (!mxm_shadow_rom_fetch(bus, addr, 0, 6, mxms))
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return false;
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}
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mxm->mxms = mxms;
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size = mxms_headerlen(mxm) + mxms_structlen(mxm);
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mxm->mxms = kmalloc(size, GFP_KERNEL);
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if (mxm->mxms &&
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mxm_shadow_rom_fetch(bus, addr, 0, size, mxm->mxms))
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return true;
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kfree(mxm->mxms);
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mxm->mxms = NULL;
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return false;
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}
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#if defined(CONFIG_ACPI)
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static bool
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mxm_shadow_dsm(struct nvkm_mxm *mxm, u8 version)
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{
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struct nvkm_subdev *subdev = &mxm->subdev;
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struct nvkm_device *device = subdev->device;
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static guid_t muid =
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GUID_INIT(0x4004A400, 0x917D, 0x4CF2,
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0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65);
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u32 mxms_args[] = { 0x00000000 };
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union acpi_object argv4 = {
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.buffer.type = ACPI_TYPE_BUFFER,
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.buffer.length = sizeof(mxms_args),
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.buffer.pointer = (char *)mxms_args,
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};
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union acpi_object *obj;
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acpi_handle handle;
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int rev;
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handle = ACPI_HANDLE(device->dev);
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if (!handle)
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return false;
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/*
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* spec says this can be zero to mean "highest revision", but
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* of course there's at least one bios out there which fails
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* unless you pass in exactly the version it supports..
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*/
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rev = (version & 0xf0) << 4 | (version & 0x0f);
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obj = acpi_evaluate_dsm(handle, &muid, rev, 0x00000010, &argv4);
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if (!obj) {
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nvkm_debug(subdev, "DSM MXMS failed\n");
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return false;
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}
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if (obj->type == ACPI_TYPE_BUFFER) {
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mxm->mxms = kmemdup(obj->buffer.pointer,
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obj->buffer.length, GFP_KERNEL);
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} else if (obj->type == ACPI_TYPE_INTEGER) {
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nvkm_debug(subdev, "DSM MXMS returned 0x%llx\n",
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obj->integer.value);
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}
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ACPI_FREE(obj);
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return mxm->mxms != NULL;
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}
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#endif
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#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)
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#define WMI_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0"
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static u8
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wmi_wmmx_mxmi(struct nvkm_mxm *mxm, u8 version)
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{
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struct nvkm_subdev *subdev = &mxm->subdev;
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u32 mxmi_args[] = { 0x494D584D /* MXMI */, version, 0 };
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struct acpi_buffer args = { sizeof(mxmi_args), mxmi_args };
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struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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acpi_status status;
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status = wmi_evaluate_method(WMI_WMMX_GUID, 0, 0, &args, &retn);
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if (ACPI_FAILURE(status)) {
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nvkm_debug(subdev, "WMMX MXMI returned %d\n", status);
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return 0x00;
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}
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obj = retn.pointer;
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if (obj->type == ACPI_TYPE_INTEGER) {
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version = obj->integer.value;
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nvkm_debug(subdev, "WMMX MXMI version %d.%d\n",
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(version >> 4), version & 0x0f);
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} else {
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version = 0;
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nvkm_debug(subdev, "WMMX MXMI returned non-integer\n");
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}
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kfree(obj);
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return version;
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}
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static bool
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mxm_shadow_wmi(struct nvkm_mxm *mxm, u8 version)
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{
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struct nvkm_subdev *subdev = &mxm->subdev;
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u32 mxms_args[] = { 0x534D584D /* MXMS */, version, 0 };
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struct acpi_buffer args = { sizeof(mxms_args), mxms_args };
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struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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acpi_status status;
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if (!wmi_has_guid(WMI_WMMX_GUID)) {
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nvkm_debug(subdev, "WMMX GUID not found\n");
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return false;
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}
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mxms_args[1] = wmi_wmmx_mxmi(mxm, 0x00);
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if (!mxms_args[1])
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mxms_args[1] = wmi_wmmx_mxmi(mxm, version);
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if (!mxms_args[1])
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return false;
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status = wmi_evaluate_method(WMI_WMMX_GUID, 0, 0, &args, &retn);
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if (ACPI_FAILURE(status)) {
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nvkm_debug(subdev, "WMMX MXMS returned %d\n", status);
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return false;
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}
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obj = retn.pointer;
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if (obj->type == ACPI_TYPE_BUFFER) {
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mxm->mxms = kmemdup(obj->buffer.pointer,
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obj->buffer.length, GFP_KERNEL);
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}
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kfree(obj);
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return mxm->mxms != NULL;
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}
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#endif
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static struct mxm_shadow_h {
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const char *name;
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bool (*exec)(struct nvkm_mxm *, u8 version);
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} _mxm_shadow[] = {
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{ "ROM", mxm_shadow_rom },
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#if defined(CONFIG_ACPI)
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{ "DSM", mxm_shadow_dsm },
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#endif
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#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)
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{ "WMI", mxm_shadow_wmi },
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#endif
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{}
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};
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static int
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mxm_shadow(struct nvkm_mxm *mxm, u8 version)
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{
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struct mxm_shadow_h *shadow = _mxm_shadow;
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do {
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nvkm_debug(&mxm->subdev, "checking %s\n", shadow->name);
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if (shadow->exec(mxm, version)) {
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if (mxms_valid(mxm))
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return 0;
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kfree(mxm->mxms);
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mxm->mxms = NULL;
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}
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} while ((++shadow)->name);
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return -ENOENT;
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}
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static const struct nvkm_subdev_func
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nvkm_mxm = {
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};
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int
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nvkm_mxm_new_(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
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struct nvkm_mxm **pmxm)
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{
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struct nvkm_bios *bios = device->bios;
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struct nvkm_mxm *mxm;
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u8 ver, len;
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u16 data;
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if (!(mxm = *pmxm = kzalloc(sizeof(*mxm), GFP_KERNEL)))
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return -ENOMEM;
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nvkm_subdev_ctor(&nvkm_mxm, device, type, inst, &mxm->subdev);
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data = mxm_table(bios, &ver, &len);
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if (!data || !(ver = nvbios_rd08(bios, data))) {
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nvkm_debug(&mxm->subdev, "no VBIOS data, nothing to do\n");
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return 0;
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}
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nvkm_info(&mxm->subdev, "BIOS version %d.%d\n", ver >> 4, ver & 0x0f);
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nvkm_debug(&mxm->subdev, "module flags: %02x\n",
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nvbios_rd08(bios, data + 0x01));
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nvkm_debug(&mxm->subdev, "config flags: %02x\n",
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nvbios_rd08(bios, data + 0x02));
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if (mxm_shadow(mxm, ver)) {
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nvkm_warn(&mxm->subdev, "failed to locate valid SIS\n");
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#if 0
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/* we should, perhaps, fall back to some kind of limited
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* mode here if the x86 vbios hasn't already done the
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* work for us (so we prevent loading with completely
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* whacked vbios tables).
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*/
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return -EINVAL;
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#else
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return 0;
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#endif
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}
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nvkm_debug(&mxm->subdev, "MXMS Version %d.%d\n",
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mxms_version(mxm) >> 8, mxms_version(mxm) & 0xff);
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mxms_foreach(mxm, 0, NULL, NULL);
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if (nvkm_boolopt(device->cfgopt, "NvMXMDCB", true))
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mxm->action |= MXM_SANITISE_DCB;
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return 0;
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}
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