summaryrefslogtreecommitdiff
path: root/drivers/platform/x86/thinkpad_acpi.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2023-11-01 06:53:00 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-11-01 06:53:00 +0300
commit59fff63cc2b75dcfe08f9eeb4b2187d73e53843d (patch)
treeec74d583e9e90699e915f06b84b210a4f5217312 /drivers/platform/x86/thinkpad_acpi.c
parent3475b91ff258b998b891964e8c263cff48384c01 (diff)
parent94ace9eda88229c73698b8dd8d3c06dd0831319c (diff)
downloadlinux-59fff63cc2b75dcfe08f9eeb4b2187d73e53843d.tar.xz
Merge tag 'platform-drivers-x86-v6.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
Pull x86 platform driver updates from Ilpo Järvinen: - asus-wmi: Support for screenpad and solve brightness key press duplication - int3472: Eliminate the last use of deprecated GPIO functions - mlxbf-pmc: New HW support - msi-ec: Support new EC configurations - thinkpad_acpi: Support reading aux MAC address during passthrough - wmi: Fixes & improvements - x86-android-tablets: Detection fix and avoid use of GPIO private APIs - Debug & metrics interface improvements - Miscellaneous cleanups / fixes / improvements * tag 'platform-drivers-x86-v6.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (80 commits) platform/x86: inspur-platform-profile: Add platform profile support platform/x86: thinkpad_acpi: Add battery quirk for Thinkpad X120e platform/x86: wmi: Decouple WMI device removal from wmi_block_list platform/x86: wmi: Fix opening of char device platform/x86: wmi: Fix probe failure when failing to register WMI devices platform/x86: wmi: Fix refcounting of WMI devices in legacy functions platform/x86: wmi: Decouple probe deferring from wmi_block_list platform/x86/amd/hsmp: Fix iomem handling platform/x86: asus-wmi: Do not report brightness up/down keys when also reported by acpi_video platform/x86: thinkpad_acpi: replace deprecated strncpy with memcpy tools/power/x86/intel-speed-select: v1.18 release tools/power/x86/intel-speed-select: Use cgroup isolate for CPU 0 tools/power/x86/intel-speed-select: Increase max CPUs in one request tools/power/x86/intel-speed-select: Display error for core-power support tools/power/x86/intel-speed-select: No TRL for non compute domains tools/power/x86/intel-speed-select: turbo-mode enable disable swapped tools/power/x86/intel-speed-select: Update help for TRL tools/power/x86/intel-speed-select: Sanitize integer arguments platform/x86: acer-wmi: Remove void function return platform/x86/amd/pmc: Add dump_custom_stb module parameter ...
Diffstat (limited to 'drivers/platform/x86/thinkpad_acpi.c')
-rw-r--r--drivers/platform/x86/thinkpad_acpi.c96
1 files changed, 94 insertions, 2 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 41584427dc32..d0b5fd4137bc 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -9816,6 +9816,7 @@ static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
* Individual addressing is broken on models that expose the
* primary battery as BAT1.
*/
+ TPACPI_Q_LNV('8', 'F', true), /* Thinkpad X120e */
TPACPI_Q_LNV('J', '7', true), /* B5400 */
TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */
TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
@@ -10787,6 +10788,89 @@ static struct ibm_struct dprc_driver_data = {
.name = "dprc",
};
+/*
+ * Auxmac
+ *
+ * This auxiliary mac address is enabled in the bios through the
+ * MAC Address Pass-through feature. In most cases, there are three
+ * possibilities: Internal Mac, Second Mac, and disabled.
+ *
+ */
+
+#define AUXMAC_LEN 12
+#define AUXMAC_START 9
+#define AUXMAC_STRLEN 22
+#define AUXMAC_BEGIN_MARKER 8
+#define AUXMAC_END_MARKER 21
+
+static char auxmac[AUXMAC_LEN + 1];
+
+static int auxmac_init(struct ibm_init_struct *iibm)
+{
+ acpi_status status;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *obj;
+
+ status = acpi_evaluate_object(NULL, "\\MACA", NULL, &buffer);
+
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ obj = buffer.pointer;
+
+ if (obj->type != ACPI_TYPE_STRING || obj->string.length != AUXMAC_STRLEN) {
+ pr_info("Invalid buffer for MAC address pass-through.\n");
+ goto auxmacinvalid;
+ }
+
+ if (obj->string.pointer[AUXMAC_BEGIN_MARKER] != '#' ||
+ obj->string.pointer[AUXMAC_END_MARKER] != '#') {
+ pr_info("Invalid header for MAC address pass-through.\n");
+ goto auxmacinvalid;
+ }
+
+ if (strncmp(obj->string.pointer + AUXMAC_START, "XXXXXXXXXXXX", AUXMAC_LEN) != 0)
+ strscpy(auxmac, obj->string.pointer + AUXMAC_START, sizeof(auxmac));
+ else
+ strscpy(auxmac, "disabled", sizeof(auxmac));
+
+free:
+ kfree(obj);
+ return 0;
+
+auxmacinvalid:
+ strscpy(auxmac, "unavailable", sizeof(auxmac));
+ goto free;
+}
+
+static struct ibm_struct auxmac_data = {
+ .name = "auxmac",
+};
+
+static ssize_t auxmac_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sysfs_emit(buf, "%s\n", auxmac);
+}
+static DEVICE_ATTR_RO(auxmac);
+
+static umode_t auxmac_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ return auxmac[0] == 0 ? 0 : attr->mode;
+}
+
+static struct attribute *auxmac_attributes[] = {
+ &dev_attr_auxmac.attr,
+ NULL
+};
+
+static const struct attribute_group auxmac_attr_group = {
+ .is_visible = auxmac_attr_is_visible,
+ .attrs = auxmac_attributes,
+};
+
/* --------------------------------------------------------------------- */
static struct attribute *tpacpi_driver_attributes[] = {
@@ -10845,6 +10929,7 @@ static const struct attribute_group *tpacpi_groups[] = {
&proxsensor_attr_group,
&kbdlang_attr_group,
&dprc_attr_group,
+ &auxmac_attr_group,
NULL,
};
@@ -11144,6 +11229,8 @@ invalid:
return '\0';
}
+#define EC_FW_STRING_LEN 18
+
static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
{
char *ec_fw_string = (char *) private;
@@ -11172,7 +11259,8 @@ static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
return;
/* fwstr is the first 8byte string */
- strncpy(ec_fw_string, dmi_data + 0x0F, 8);
+ BUILD_BUG_ON(EC_FW_STRING_LEN <= 8);
+ memcpy(ec_fw_string, dmi_data + 0x0F, 8);
}
/* returns 0 - probe ok, or < 0 - probe error.
@@ -11182,7 +11270,7 @@ static int __must_check __init get_thinkpad_model_data(
struct thinkpad_id_data *tp)
{
const struct dmi_device *dev = NULL;
- char ec_fw_string[18] = {0};
+ char ec_fw_string[EC_FW_STRING_LEN] = {0};
char const *s;
char t;
@@ -11416,6 +11504,10 @@ static struct ibm_init_struct ibms_init[] __initdata = {
.init = tpacpi_dprc_init,
.data = &dprc_driver_data,
},
+ {
+ .init = auxmac_init,
+ .data = &auxmac_data,
+ },
};
static int __init set_ibm_param(const char *val, const struct kernel_param *kp)