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/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2017 Intel Deutschland GmbH
* Copyright (C) 2019 - 2020 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2017 Intel Deutschland GmbH
* Copyright (C) 2019 - 2020 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#include <linux/uuid.h>
#include "iwl-drv.h"
#include "iwl-debug.h"
#include "acpi.h"
#include "fw/runtime.h"
static const guid_t intel_wifi_guid = GUID_INIT(0xF21202BF, 0x8F78, 0x4DC6,
0xA5, 0xB3, 0x1F, 0x73,
0x8E, 0x28, 0x5A, 0xDE);
static int iwl_acpi_get_handle(struct device *dev, acpi_string method,
acpi_handle *ret_handle)
{
acpi_handle root_handle;
acpi_status status;
root_handle = ACPI_HANDLE(dev);
if (!root_handle) {
IWL_DEBUG_DEV_RADIO(dev,
"ACPI: Could not retrieve root port handle\n");
return -ENOENT;
}
status = acpi_get_handle(root_handle, method, ret_handle);
if (ACPI_FAILURE(status)) {
IWL_DEBUG_DEV_RADIO(dev,
"ACPI: %s method not found\n", method);
return -ENOENT;
}
return 0;
}
void *iwl_acpi_get_object(struct device *dev, acpi_string method)
{
struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL};
acpi_handle handle;
acpi_status status;
int ret;
ret = iwl_acpi_get_handle(dev, method, &handle);
if (ret)
return ERR_PTR(-ENOENT);
/* Call the method with no arguments */
status = acpi_evaluate_object(handle, NULL, NULL, &buf);
if (ACPI_FAILURE(status)) {
IWL_DEBUG_DEV_RADIO(dev,
"ACPI: %s method invocation failed (status: 0x%x)\n",
method, status);
return ERR_PTR(-ENOENT);
}
return buf.pointer;
}
IWL_EXPORT_SYMBOL(iwl_acpi_get_object);
/**
* Generic function for evaluating a method defined in the device specific
* method (DSM) interface. The returned acpi object must be freed by calling
* function.
*/
static void *iwl_acpi_get_dsm_object(struct device *dev, int rev, int func,
union acpi_object *args)
{
union acpi_object *obj;
obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_wifi_guid, rev, func,
args);
if (!obj) {
IWL_DEBUG_DEV_RADIO(dev,
"ACPI: DSM method invocation failed (rev: %d, func:%d)\n",
rev, func);
return ERR_PTR(-ENOENT);
}
return obj;
}
/**
* Evaluate a DSM with no arguments and a single u8 return value (inside a
* buffer object), verify and return that value.
*/
int iwl_acpi_get_dsm_u8(struct device *dev, int rev, int func)
{
union acpi_object *obj;
int ret;
obj = iwl_acpi_get_dsm_object(dev, rev, func, NULL);
if (IS_ERR(obj))
return -ENOENT;
if (obj->type != ACPI_TYPE_BUFFER) {
IWL_DEBUG_DEV_RADIO(dev,
"ACPI: DSM method did not return a valid object, type=%d\n",
obj->type);
ret = -EINVAL;
goto out;
}
if (obj->buffer.length != sizeof(u8)) {
IWL_DEBUG_DEV_RADIO(dev,
"ACPI: DSM method returned invalid buffer, length=%d\n",
obj->buffer.length);
ret = -EINVAL;
goto out;
}
ret = obj->buffer.pointer[0];
IWL_DEBUG_DEV_RADIO(dev,
"ACPI: DSM method evaluated: func=%d, ret=%d\n",
func, ret);
out:
ACPI_FREE(obj);
return ret;
}
IWL_EXPORT_SYMBOL(iwl_acpi_get_dsm_u8);
union acpi_object *iwl_acpi_get_wifi_pkg(struct device *dev,
union acpi_object *data,
int data_size, int *tbl_rev)
{
int i;
union acpi_object *wifi_pkg;
/*
* We need at least one entry in the wifi package that
* describes the domain, and one more entry, otherwise there's
* no point in reading it.
*/
if (WARN_ON_ONCE(data_size < 2))
return ERR_PTR(-EINVAL);
/*
* We need at least two packages, one for the revision and one
* for the data itself. Also check that the revision is valid
* (i.e. it is an integer smaller than 2, as we currently support only
* 2 revisions).
*/
if (data->type != ACPI_TYPE_PACKAGE ||
data->package.count < 2 ||
data->package.elements[0].type != ACPI_TYPE_INTEGER ||
data->package.elements[0].integer.value > 1) {
IWL_DEBUG_DEV_RADIO(dev, "Unsupported packages structure\n");
return ERR_PTR(-EINVAL);
}
*tbl_rev = data->package.elements[0].integer.value;
/* loop through all the packages to find the one for WiFi */
for (i = 1; i < data->package.count; i++) {
union acpi_object *domain;
wifi_pkg = &data->package.elements[i];
/* skip entries that are not a package with the right size */
if (wifi_pkg->type != ACPI_TYPE_PACKAGE ||
wifi_pkg->package.count != data_size)
continue;
domain = &wifi_pkg->package.elements[0];
if (domain->type == ACPI_TYPE_INTEGER &&
domain->integer.value == ACPI_WIFI_DOMAIN)
goto found;
}
return ERR_PTR(-ENOENT);
found:
return wifi_pkg;
}
IWL_EXPORT_SYMBOL(iwl_acpi_get_wifi_pkg);
int iwl_acpi_get_tas(struct iwl_fw_runtime *fwrt,
__le32 *black_list_array,
int *black_list_size)
{
union acpi_object *wifi_pkg, *data;
int ret, tbl_rev, i;
bool enabled;
data = iwl_acpi_get_object(fwrt->dev, ACPI_WTAS_METHOD);
if (IS_ERR(data))
return PTR_ERR(data);
wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
ACPI_WTAS_WIFI_DATA_SIZE,
&tbl_rev);
if (IS_ERR(wifi_pkg)) {
ret = PTR_ERR(wifi_pkg);
goto out_free;
}
if (wifi_pkg->package.elements[0].type != ACPI_TYPE_INTEGER ||
tbl_rev != 0) {
ret = -EINVAL;
goto out_free;
}
enabled = !!wifi_pkg->package.elements[0].integer.value;
if (!enabled) {
*black_list_size = -1;
IWL_DEBUG_RADIO(fwrt, "TAS not enabled\n");
ret = 0;
goto out_free;
}
if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER ||
wifi_pkg->package.elements[1].integer.value >
APCI_WTAS_BLACK_LIST_MAX) {
IWL_DEBUG_RADIO(fwrt, "TAS invalid array size %llu\n",
wifi_pkg->package.elements[1].integer.value);
ret = -EINVAL;
goto out_free;
}
*black_list_size = wifi_pkg->package.elements[1].integer.value;
IWL_DEBUG_RADIO(fwrt, "TAS array size %d\n", *black_list_size);
if (*black_list_size > APCI_WTAS_BLACK_LIST_MAX) {
IWL_DEBUG_RADIO(fwrt, "TAS invalid array size value %u\n",
*black_list_size);
ret = -EINVAL;
goto out_free;
}
for (i = 0; i < *black_list_size; i++) {
u32 country;
if (wifi_pkg->package.elements[2 + i].type !=
ACPI_TYPE_INTEGER) {
IWL_DEBUG_RADIO(fwrt,
"TAS invalid array elem %d\n", 2 + i);
ret = -EINVAL;
goto out_free;
}
country = wifi_pkg->package.elements[2 + i].integer.value;
black_list_array[i] = cpu_to_le32(country);
IWL_DEBUG_RADIO(fwrt, "TAS black list country %d\n", country);
}
ret = 0;
out_free:
kfree(data);
return ret;
}
IWL_EXPORT_SYMBOL(iwl_acpi_get_tas);
int iwl_acpi_get_mcc(struct device *dev, char *mcc)
{
union acpi_object *wifi_pkg, *data;
u32 mcc_val;
int ret, tbl_rev;
data = iwl_acpi_get_object(dev, ACPI_WRDD_METHOD);
if (IS_ERR(data))
return PTR_ERR(data);
wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_WRDD_WIFI_DATA_SIZE,
&tbl_rev);
if (IS_ERR(wifi_pkg)) {
ret = PTR_ERR(wifi_pkg);
goto out_free;
}
if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER ||
tbl_rev != 0) {
ret = -EINVAL;
goto out_free;
}
mcc_val = wifi_pkg->package.elements[1].integer.value;
mcc[0] = (mcc_val >> 8) & 0xff;
mcc[1] = mcc_val & 0xff;
mcc[2] = '\0';
ret = 0;
out_free:
kfree(data);
return ret;
}
IWL_EXPORT_SYMBOL(iwl_acpi_get_mcc);
u64 iwl_acpi_get_pwr_limit(struct device *dev)
{
union acpi_object *data, *wifi_pkg;
u64 dflt_pwr_limit;
int tbl_rev;
data = iwl_acpi_get_object(dev, ACPI_SPLC_METHOD);
if (IS_ERR(data)) {
dflt_pwr_limit = 0;
goto out;
}
wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data,
ACPI_SPLC_WIFI_DATA_SIZE, &tbl_rev);
if (IS_ERR(wifi_pkg) || tbl_rev != 0 ||
wifi_pkg->package.elements[1].integer.value != ACPI_TYPE_INTEGER) {
dflt_pwr_limit = 0;
goto out_free;
}
dflt_pwr_limit = wifi_pkg->package.elements[1].integer.value;
out_free:
kfree(data);
out:
return dflt_pwr_limit;
}
IWL_EXPORT_SYMBOL(iwl_acpi_get_pwr_limit);
int iwl_acpi_get_eckv(struct device *dev, u32 *extl_clk)
{
union acpi_object *wifi_pkg, *data;
int ret, tbl_rev;
data = iwl_acpi_get_object(dev, ACPI_ECKV_METHOD);
if (IS_ERR(data))
return PTR_ERR(data);
wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_ECKV_WIFI_DATA_SIZE,
&tbl_rev);
if (IS_ERR(wifi_pkg)) {
ret = PTR_ERR(wifi_pkg);
goto out_free;
}
if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER ||
tbl_rev != 0) {
ret = -EINVAL;
goto out_free;
}
*extl_clk = wifi_pkg->package.elements[1].integer.value;
ret = 0;
out_free:
kfree(data);
return ret;
}
IWL_EXPORT_SYMBOL(iwl_acpi_get_eckv);
static int iwl_sar_set_profile(union acpi_object *table,
struct iwl_sar_profile *profile,
bool enabled)
{
int i;
profile->enabled = enabled;
for (i = 0; i < ACPI_SAR_TABLE_SIZE; i++) {
if (table[i].type != ACPI_TYPE_INTEGER ||
table[i].integer.value > U8_MAX)
return -EINVAL;
profile->table[i] = table[i].integer.value;
}
return 0;
}
static int iwl_sar_fill_table(struct iwl_fw_runtime *fwrt,
__le16 *per_chain, u32 n_subbands,
int prof_a, int prof_b)
{
int profs[ACPI_SAR_NUM_CHAIN_LIMITS] = { prof_a, prof_b };
int i, j, idx;
for (i = 0; i < ACPI_SAR_NUM_CHAIN_LIMITS; i++) {
struct iwl_sar_profile *prof;
/* don't allow SAR to be disabled (profile 0 means disable) */
if (profs[i] == 0)
return -EPERM;
/* we are off by one, so allow up to ACPI_SAR_PROFILE_NUM */
if (profs[i] > ACPI_SAR_PROFILE_NUM)
return -EINVAL;
/* profiles go from 1 to 4, so decrement to access the array */
prof = &fwrt->sar_profiles[profs[i] - 1];
/* if the profile is disabled, do nothing */
if (!prof->enabled) {
IWL_DEBUG_RADIO(fwrt, "SAR profile %d is disabled.\n",
profs[i]);
/*
* if one of the profiles is disabled, we
* ignore all of them and return 1 to
* differentiate disabled from other failures.
*/
return 1;
}
IWL_DEBUG_INFO(fwrt,
"SAR EWRD: chain %d profile index %d\n",
i, profs[i]);
IWL_DEBUG_RADIO(fwrt, " Chain[%d]:\n", i);
for (j = 0; j < n_subbands; j++) {
idx = i * ACPI_SAR_NUM_SUB_BANDS + j;
per_chain[i * n_subbands + j] =
cpu_to_le16(prof->table[idx]);
IWL_DEBUG_RADIO(fwrt, " Band[%d] = %d * .125dBm\n",
j, prof->table[idx]);
}
}
return 0;
}
int iwl_sar_select_profile(struct iwl_fw_runtime *fwrt,
__le16 *per_chain, u32 n_tables, u32 n_subbands,
int prof_a, int prof_b)
{
int i, ret = 0;
for (i = 0; i < n_tables; i++) {
ret = iwl_sar_fill_table(fwrt,
&per_chain[i * n_subbands * ACPI_SAR_NUM_CHAIN_LIMITS],
n_subbands, prof_a, prof_b);
if (ret)
break;
}
return ret;
}
IWL_EXPORT_SYMBOL(iwl_sar_select_profile);
int iwl_sar_get_wrds_table(struct iwl_fw_runtime *fwrt)
{
union acpi_object *wifi_pkg, *table, *data;
bool enabled;
int ret, tbl_rev;
data = iwl_acpi_get_object(fwrt->dev, ACPI_WRDS_METHOD);
if (IS_ERR(data))
return PTR_ERR(data);
wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
ACPI_WRDS_WIFI_DATA_SIZE, &tbl_rev);
if (IS_ERR(wifi_pkg) || tbl_rev != 0) {
ret = PTR_ERR(wifi_pkg);
goto out_free;
}
if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) {
ret = -EINVAL;
goto out_free;
}
enabled = !!(wifi_pkg->package.elements[1].integer.value);
/* position of the actual table */
table = &wifi_pkg->package.elements[2];
/* The profile from WRDS is officially profile 1, but goes
* into sar_profiles[0] (because we don't have a profile 0).
*/
ret = iwl_sar_set_profile(table, &fwrt->sar_profiles[0], enabled);
out_free:
kfree(data);
return ret;
}
IWL_EXPORT_SYMBOL(iwl_sar_get_wrds_table);
int iwl_sar_get_ewrd_table(struct iwl_fw_runtime *fwrt)
{
union acpi_object *wifi_pkg, *data;
bool enabled;
int i, n_profiles, tbl_rev, pos;
int ret = 0;
data = iwl_acpi_get_object(fwrt->dev, ACPI_EWRD_METHOD);
if (IS_ERR(data))
return PTR_ERR(data);
wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
ACPI_EWRD_WIFI_DATA_SIZE, &tbl_rev);
if (IS_ERR(wifi_pkg) || tbl_rev != 0) {
ret = PTR_ERR(wifi_pkg);
goto out_free;
}
if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER ||
wifi_pkg->package.elements[2].type != ACPI_TYPE_INTEGER) {
ret = -EINVAL;
goto out_free;
}
enabled = !!(wifi_pkg->package.elements[1].integer.value);
n_profiles = wifi_pkg->package.elements[2].integer.value;
/*
* Check the validity of n_profiles. The EWRD profiles start
* from index 1, so the maximum value allowed here is
* ACPI_SAR_PROFILES_NUM - 1.
*/
if (n_profiles <= 0 || n_profiles >= ACPI_SAR_PROFILE_NUM) {
ret = -EINVAL;
goto out_free;
}
/* the tables start at element 3 */
pos = 3;
for (i = 0; i < n_profiles; i++) {
/* The EWRD profiles officially go from 2 to 4, but we
* save them in sar_profiles[1-3] (because we don't
* have profile 0). So in the array we start from 1.
*/
ret = iwl_sar_set_profile(&wifi_pkg->package.elements[pos],
&fwrt->sar_profiles[i + 1],
enabled);
if (ret < 0)
break;
/* go to the next table */
pos += ACPI_SAR_TABLE_SIZE;
}
out_free:
kfree(data);
return ret;
}
IWL_EXPORT_SYMBOL(iwl_sar_get_ewrd_table);
int iwl_sar_get_wgds_table(struct iwl_fw_runtime *fwrt)
{
union acpi_object *wifi_pkg, *data;
int i, j, ret, tbl_rev;
int idx = 1;
data = iwl_acpi_get_object(fwrt->dev, ACPI_WGDS_METHOD);
if (IS_ERR(data))
return PTR_ERR(data);
wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
ACPI_WGDS_WIFI_DATA_SIZE, &tbl_rev);
if (IS_ERR(wifi_pkg) || tbl_rev > 1) {
ret = PTR_ERR(wifi_pkg);
goto out_free;
}
fwrt->geo_rev = tbl_rev;
for (i = 0; i < ACPI_NUM_GEO_PROFILES; i++) {
for (j = 0; j < ACPI_GEO_TABLE_SIZE; j++) {
union acpi_object *entry;
entry = &wifi_pkg->package.elements[idx++];
if (entry->type != ACPI_TYPE_INTEGER ||
entry->integer.value > U8_MAX) {
ret = -EINVAL;
goto out_free;
}
fwrt->geo_profiles[i].values[j] = entry->integer.value;
}
}
ret = 0;
out_free:
kfree(data);
return ret;
}
IWL_EXPORT_SYMBOL(iwl_sar_get_wgds_table);
bool iwl_sar_geo_support(struct iwl_fw_runtime *fwrt)
{
/*
* The GEO_TX_POWER_LIMIT command is not supported on earlier
* firmware versions. Unfortunately, we don't have a TLV API
* flag to rely on, so rely on the major version which is in
* the first byte of ucode_ver. This was implemented
* initially on version 38 and then backported to 17. It was
* also backported to 29, but only for 7265D devices. The
* intention was to have it in 36 as well, but not all 8000
* family got this feature enabled. The 8000 family is the
* only one using version 36, so skip this version entirely.
*/
return IWL_UCODE_SERIAL(fwrt->fw->ucode_ver) >= 38 ||
IWL_UCODE_SERIAL(fwrt->fw->ucode_ver) == 17 ||
(IWL_UCODE_SERIAL(fwrt->fw->ucode_ver) == 29 &&
((fwrt->trans->hw_rev & CSR_HW_REV_TYPE_MSK) ==
CSR_HW_REV_TYPE_7265D));
}
IWL_EXPORT_SYMBOL(iwl_sar_geo_support);
int iwl_sar_geo_init(struct iwl_fw_runtime *fwrt,
struct iwl_per_chain_offset *table, u32 n_bands)
{
int ret, i, j;
if (!iwl_sar_geo_support(fwrt))
return -EOPNOTSUPP;
ret = iwl_sar_get_wgds_table(fwrt);
if (ret < 0) {
IWL_DEBUG_RADIO(fwrt,
"Geo SAR BIOS table invalid or unavailable. (%d)\n",
ret);
/* we don't fail if the table is not available */
return -ENOENT;
}
for (i = 0; i < ACPI_NUM_GEO_PROFILES; i++) {
for (j = 0; j < n_bands; j++) {
struct iwl_per_chain_offset *chain =
&table[i * n_bands + j];
u8 *value;
if (j * ACPI_GEO_PER_CHAIN_SIZE >=
ARRAY_SIZE(fwrt->geo_profiles[0].values))
/*
* Currently we only store lb an hb values, and
* don't have any special ones for uhb. So leave
* those empty for the time being
*/
break;
value = &fwrt->geo_profiles[i].values[j *
ACPI_GEO_PER_CHAIN_SIZE];
chain->max_tx_power = cpu_to_le16(value[0]);
chain->chain_a = value[1];
chain->chain_b = value[2];
IWL_DEBUG_RADIO(fwrt,
"SAR geographic profile[%d] Band[%d]: chain A = %d chain B = %d max_tx_power = %d\n",
i, j, value[1], value[2], value[0]);
}
}
return 0;
}
IWL_EXPORT_SYMBOL(iwl_sar_geo_init);
|