summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c279
1 files changed, 279 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
new file mode 100644
index 000000000..c1acfe642
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
@@ -0,0 +1,279 @@
+/*
+ * Copyright 2011 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "mxms.h"
+
+#include <core/option.h>
+#include <subdev/bios.h>
+#include <subdev/bios/mxm.h>
+#include <subdev/i2c.h>
+
+static bool
+mxm_shadow_rom_fetch(struct nvkm_i2c_bus *bus, u8 addr,
+ u8 offset, u8 size, u8 *data)
+{
+ struct i2c_msg msgs[] = {
+ { .addr = addr, .flags = 0, .len = 1, .buf = &offset },
+ { .addr = addr, .flags = I2C_M_RD, .len = size, .buf = data, },
+ };
+
+ return i2c_transfer(&bus->i2c, msgs, 2) == 2;
+}
+
+static bool
+mxm_shadow_rom(struct nvkm_mxm *mxm, u8 version)
+{
+ struct nvkm_device *device = mxm->subdev.device;
+ struct nvkm_bios *bios = device->bios;
+ struct nvkm_i2c *i2c = device->i2c;
+ struct nvkm_i2c_bus *bus = NULL;
+ u8 i2cidx, mxms[6], addr, size;
+
+ i2cidx = mxm_ddc_map(bios, 1 /* LVDS_DDC */) & 0x0f;
+ if (i2cidx < 0x0f)
+ bus = nvkm_i2c_bus_find(i2c, i2cidx);
+ if (!bus)
+ return false;
+
+ addr = 0x54;
+ if (!mxm_shadow_rom_fetch(bus, addr, 0, 6, mxms)) {
+ addr = 0x56;
+ if (!mxm_shadow_rom_fetch(bus, addr, 0, 6, mxms))
+ return false;
+ }
+
+ mxm->mxms = mxms;
+ size = mxms_headerlen(mxm) + mxms_structlen(mxm);
+ mxm->mxms = kmalloc(size, GFP_KERNEL);
+
+ if (mxm->mxms &&
+ mxm_shadow_rom_fetch(bus, addr, 0, size, mxm->mxms))
+ return true;
+
+ kfree(mxm->mxms);
+ mxm->mxms = NULL;
+ return false;
+}
+
+#if defined(CONFIG_ACPI)
+static bool
+mxm_shadow_dsm(struct nvkm_mxm *mxm, u8 version)
+{
+ struct nvkm_subdev *subdev = &mxm->subdev;
+ struct nvkm_device *device = subdev->device;
+ static guid_t muid =
+ GUID_INIT(0x4004A400, 0x917D, 0x4CF2,
+ 0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65);
+ u32 mxms_args[] = { 0x00000000 };
+ union acpi_object argv4 = {
+ .buffer.type = ACPI_TYPE_BUFFER,
+ .buffer.length = sizeof(mxms_args),
+ .buffer.pointer = (char *)mxms_args,
+ };
+ union acpi_object *obj;
+ acpi_handle handle;
+ int rev;
+
+ handle = ACPI_HANDLE(device->dev);
+ if (!handle)
+ return false;
+
+ /*
+ * spec says this can be zero to mean "highest revision", but
+ * of course there's at least one bios out there which fails
+ * unless you pass in exactly the version it supports..
+ */
+ rev = (version & 0xf0) << 4 | (version & 0x0f);
+ obj = acpi_evaluate_dsm(handle, &muid, rev, 0x00000010, &argv4);
+ if (!obj) {
+ nvkm_debug(subdev, "DSM MXMS failed\n");
+ return false;
+ }
+
+ if (obj->type == ACPI_TYPE_BUFFER) {
+ mxm->mxms = kmemdup(obj->buffer.pointer,
+ obj->buffer.length, GFP_KERNEL);
+ } else if (obj->type == ACPI_TYPE_INTEGER) {
+ nvkm_debug(subdev, "DSM MXMS returned 0x%llx\n",
+ obj->integer.value);
+ }
+
+ ACPI_FREE(obj);
+ return mxm->mxms != NULL;
+}
+#endif
+
+#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)
+
+#define WMI_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0"
+
+static u8
+wmi_wmmx_mxmi(struct nvkm_mxm *mxm, u8 version)
+{
+ struct nvkm_subdev *subdev = &mxm->subdev;
+ u32 mxmi_args[] = { 0x494D584D /* MXMI */, version, 0 };
+ struct acpi_buffer args = { sizeof(mxmi_args), mxmi_args };
+ struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *obj;
+ acpi_status status;
+
+ status = wmi_evaluate_method(WMI_WMMX_GUID, 0, 0, &args, &retn);
+ if (ACPI_FAILURE(status)) {
+ nvkm_debug(subdev, "WMMX MXMI returned %d\n", status);
+ return 0x00;
+ }
+
+ obj = retn.pointer;
+ if (obj->type == ACPI_TYPE_INTEGER) {
+ version = obj->integer.value;
+ nvkm_debug(subdev, "WMMX MXMI version %d.%d\n",
+ (version >> 4), version & 0x0f);
+ } else {
+ version = 0;
+ nvkm_debug(subdev, "WMMX MXMI returned non-integer\n");
+ }
+
+ kfree(obj);
+ return version;
+}
+
+static bool
+mxm_shadow_wmi(struct nvkm_mxm *mxm, u8 version)
+{
+ struct nvkm_subdev *subdev = &mxm->subdev;
+ u32 mxms_args[] = { 0x534D584D /* MXMS */, version, 0 };
+ struct acpi_buffer args = { sizeof(mxms_args), mxms_args };
+ struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *obj;
+ acpi_status status;
+
+ if (!wmi_has_guid(WMI_WMMX_GUID)) {
+ nvkm_debug(subdev, "WMMX GUID not found\n");
+ return false;
+ }
+
+ mxms_args[1] = wmi_wmmx_mxmi(mxm, 0x00);
+ if (!mxms_args[1])
+ mxms_args[1] = wmi_wmmx_mxmi(mxm, version);
+ if (!mxms_args[1])
+ return false;
+
+ status = wmi_evaluate_method(WMI_WMMX_GUID, 0, 0, &args, &retn);
+ if (ACPI_FAILURE(status)) {
+ nvkm_debug(subdev, "WMMX MXMS returned %d\n", status);
+ return false;
+ }
+
+ obj = retn.pointer;
+ if (obj->type == ACPI_TYPE_BUFFER) {
+ mxm->mxms = kmemdup(obj->buffer.pointer,
+ obj->buffer.length, GFP_KERNEL);
+ }
+
+ kfree(obj);
+ return mxm->mxms != NULL;
+}
+#endif
+
+static struct mxm_shadow_h {
+ const char *name;
+ bool (*exec)(struct nvkm_mxm *, u8 version);
+} _mxm_shadow[] = {
+ { "ROM", mxm_shadow_rom },
+#if defined(CONFIG_ACPI)
+ { "DSM", mxm_shadow_dsm },
+#endif
+#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)
+ { "WMI", mxm_shadow_wmi },
+#endif
+ {}
+};
+
+static int
+mxm_shadow(struct nvkm_mxm *mxm, u8 version)
+{
+ struct mxm_shadow_h *shadow = _mxm_shadow;
+ do {
+ nvkm_debug(&mxm->subdev, "checking %s\n", shadow->name);
+ if (shadow->exec(mxm, version)) {
+ if (mxms_valid(mxm))
+ return 0;
+ kfree(mxm->mxms);
+ mxm->mxms = NULL;
+ }
+ } while ((++shadow)->name);
+ return -ENOENT;
+}
+
+static const struct nvkm_subdev_func
+nvkm_mxm = {
+};
+
+int
+nvkm_mxm_new_(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+ struct nvkm_mxm **pmxm)
+{
+ struct nvkm_bios *bios = device->bios;
+ struct nvkm_mxm *mxm;
+ u8 ver, len;
+ u16 data;
+
+ if (!(mxm = *pmxm = kzalloc(sizeof(*mxm), GFP_KERNEL)))
+ return -ENOMEM;
+
+ nvkm_subdev_ctor(&nvkm_mxm, device, type, inst, &mxm->subdev);
+
+ data = mxm_table(bios, &ver, &len);
+ if (!data || !(ver = nvbios_rd08(bios, data))) {
+ nvkm_debug(&mxm->subdev, "no VBIOS data, nothing to do\n");
+ return 0;
+ }
+
+ nvkm_info(&mxm->subdev, "BIOS version %d.%d\n", ver >> 4, ver & 0x0f);
+ nvkm_debug(&mxm->subdev, "module flags: %02x\n",
+ nvbios_rd08(bios, data + 0x01));
+ nvkm_debug(&mxm->subdev, "config flags: %02x\n",
+ nvbios_rd08(bios, data + 0x02));
+
+ if (mxm_shadow(mxm, ver)) {
+ nvkm_warn(&mxm->subdev, "failed to locate valid SIS\n");
+#if 0
+ /* we should, perhaps, fall back to some kind of limited
+ * mode here if the x86 vbios hasn't already done the
+ * work for us (so we prevent loading with completely
+ * whacked vbios tables).
+ */
+ return -EINVAL;
+#else
+ return 0;
+#endif
+ }
+
+ nvkm_debug(&mxm->subdev, "MXMS Version %d.%d\n",
+ mxms_version(mxm) >> 8, mxms_version(mxm) & 0xff);
+ mxms_foreach(mxm, 0, NULL, NULL);
+
+ if (nvkm_boolopt(device->cfgopt, "NvMXMDCB", true))
+ mxm->action |= MXM_SANITISE_DCB;
+ return 0;
+}