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path: root/drivers/platform/x86/dell-laptop.c
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Diffstat (limited to 'drivers/platform/x86/dell-laptop.c')
-rw-r--r--drivers/platform/x86/dell-laptop.c370
1 files changed, 105 insertions, 265 deletions
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index aaeeae81e3a9..2c2f02b2e08a 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -28,12 +28,11 @@
#include <linux/acpi.h>
#include <linux/mm.h>
#include <linux/i8042.h>
-#include <linux/slab.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <acpi/video.h>
-#include "../../firmware/dcdbas.h"
#include "dell-rbtn.h"
+#include "dell-smbios.h"
#define BRIGHTNESS_TOKEN 0x7d
#define KBD_LED_OFF_TOKEN 0x01E1
@@ -44,33 +43,6 @@
#define KBD_LED_AUTO_75_TOKEN 0x02EC
#define KBD_LED_AUTO_100_TOKEN 0x02F6
-/* This structure will be modified by the firmware when we enter
- * system management mode, hence the volatiles */
-
-struct calling_interface_buffer {
- u16 class;
- u16 select;
- volatile u32 input[4];
- volatile u32 output[4];
-} __packed;
-
-struct calling_interface_token {
- u16 tokenID;
- u16 location;
- union {
- u16 value;
- u16 stringlength;
- };
-};
-
-struct calling_interface_structure {
- struct dmi_header header;
- u16 cmdIOAddress;
- u8 cmdIOCode;
- u32 supportedCmds;
- struct calling_interface_token tokens[];
-} __packed;
-
struct quirk_entry {
u8 touchpad_led;
@@ -103,11 +75,6 @@ static struct quirk_entry quirk_dell_xps13_9333 = {
.kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
};
-static int da_command_address;
-static int da_command_code;
-static int da_num_tokens;
-static struct calling_interface_token *da_tokens;
-
static struct platform_driver platform_driver = {
.driver = {
.name = "dell-laptop",
@@ -306,126 +273,6 @@ static const struct dmi_system_id dell_quirks[] __initconst = {
{ }
};
-static struct calling_interface_buffer *buffer;
-static DEFINE_MUTEX(buffer_mutex);
-
-static void clear_buffer(void)
-{
- memset(buffer, 0, sizeof(struct calling_interface_buffer));
-}
-
-static void get_buffer(void)
-{
- mutex_lock(&buffer_mutex);
- clear_buffer();
-}
-
-static void release_buffer(void)
-{
- mutex_unlock(&buffer_mutex);
-}
-
-static void __init parse_da_table(const struct dmi_header *dm)
-{
- /* Final token is a terminator, so we don't want to copy it */
- int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
- struct calling_interface_token *new_da_tokens;
- struct calling_interface_structure *table =
- container_of(dm, struct calling_interface_structure, header);
-
- /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
- 6 bytes of entry */
-
- if (dm->length < 17)
- return;
-
- da_command_address = table->cmdIOAddress;
- da_command_code = table->cmdIOCode;
-
- new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
- sizeof(struct calling_interface_token),
- GFP_KERNEL);
-
- if (!new_da_tokens)
- return;
- da_tokens = new_da_tokens;
-
- memcpy(da_tokens+da_num_tokens, table->tokens,
- sizeof(struct calling_interface_token) * tokens);
-
- da_num_tokens += tokens;
-}
-
-static void __init find_tokens(const struct dmi_header *dm, void *dummy)
-{
- switch (dm->type) {
- case 0xd4: /* Indexed IO */
- case 0xd5: /* Protected Area Type 1 */
- case 0xd6: /* Protected Area Type 2 */
- break;
- case 0xda: /* Calling interface */
- parse_da_table(dm);
- break;
- }
-}
-
-static int find_token_id(int tokenid)
-{
- int i;
-
- for (i = 0; i < da_num_tokens; i++) {
- if (da_tokens[i].tokenID == tokenid)
- return i;
- }
-
- return -1;
-}
-
-static int find_token_location(int tokenid)
-{
- int id;
-
- id = find_token_id(tokenid);
- if (id == -1)
- return -1;
-
- return da_tokens[id].location;
-}
-
-static struct calling_interface_buffer *
-dell_send_request(struct calling_interface_buffer *buffer, int class,
- int select)
-{
- struct smi_cmd command;
-
- command.magic = SMI_CMD_MAGIC;
- command.command_address = da_command_address;
- command.command_code = da_command_code;
- command.ebx = virt_to_phys(buffer);
- command.ecx = 0x42534931;
-
- buffer->class = class;
- buffer->select = select;
-
- dcdbas_smi_request(&command);
-
- return buffer;
-}
-
-static inline int dell_smi_error(int value)
-{
- switch (value) {
- case 0: /* Completed successfully */
- return 0;
- case -1: /* Completed with error */
- return -EIO;
- case -2: /* Function not supported */
- return -ENXIO;
- default: /* Unknown error */
- return -EINVAL;
- }
-}
-
/*
* Derived from information in smbios-wireless-ctl:
*
@@ -548,6 +395,7 @@ static inline int dell_smi_error(int value)
static int dell_rfkill_set(void *data, bool blocked)
{
+ struct calling_interface_buffer *buffer;
int disable = blocked ? 1 : 0;
unsigned long radio = (unsigned long)data;
int hwswitch_bit = (unsigned long)data - 1;
@@ -555,19 +403,19 @@ static int dell_rfkill_set(void *data, bool blocked)
int status;
int ret;
- get_buffer();
+ buffer = dell_smbios_get_buffer();
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
ret = buffer->output[0];
status = buffer->output[1];
if (ret != 0)
goto out;
- clear_buffer();
+ dell_smbios_clear_buffer();
buffer->input[0] = 0x2;
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
ret = buffer->output[0];
hwswitch = buffer->output[1];
@@ -577,27 +425,28 @@ static int dell_rfkill_set(void *data, bool blocked)
(status & BIT(0)) && !(status & BIT(16)))
disable = 1;
- clear_buffer();
+ dell_smbios_clear_buffer();
buffer->input[0] = (1 | (radio<<8) | (disable << 16));
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
ret = buffer->output[0];
out:
- release_buffer();
- return dell_smi_error(ret);
+ dell_smbios_release_buffer();
+ return dell_smbios_error(ret);
}
/* Must be called with the buffer held */
static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
- int status)
+ int status,
+ struct calling_interface_buffer *buffer)
{
if (status & BIT(0)) {
/* Has hw-switch, sync sw_state to BIOS */
int block = rfkill_blocked(rfkill);
- clear_buffer();
+ dell_smbios_clear_buffer();
buffer->input[0] = (1 | (radio << 8) | (block << 16));
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
} else {
/* No hw-switch, sync BIOS state to sw_state */
rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16)));
@@ -613,30 +462,31 @@ static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
static void dell_rfkill_query(struct rfkill *rfkill, void *data)
{
+ struct calling_interface_buffer *buffer;
int radio = ((unsigned long)data & 0xF);
int hwswitch;
int status;
int ret;
- get_buffer();
+ buffer = dell_smbios_get_buffer();
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
ret = buffer->output[0];
status = buffer->output[1];
if (ret != 0 || !(status & BIT(0))) {
- release_buffer();
+ dell_smbios_release_buffer();
return;
}
- clear_buffer();
+ dell_smbios_clear_buffer();
buffer->input[0] = 0x2;
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
ret = buffer->output[0];
hwswitch = buffer->output[1];
- release_buffer();
+ dell_smbios_release_buffer();
if (ret != 0)
return;
@@ -653,25 +503,26 @@ static struct dentry *dell_laptop_dir;
static int dell_debugfs_show(struct seq_file *s, void *data)
{
+ struct calling_interface_buffer *buffer;
int hwswitch_state;
int hwswitch_ret;
int status;
int ret;
- get_buffer();
+ buffer = dell_smbios_get_buffer();
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
ret = buffer->output[0];
status = buffer->output[1];
- clear_buffer();
+ dell_smbios_clear_buffer();
buffer->input[0] = 0x2;
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
hwswitch_ret = buffer->output[0];
hwswitch_state = buffer->output[1];
- release_buffer();
+ dell_smbios_release_buffer();
seq_printf(s, "return:\t%d\n", ret);
seq_printf(s, "status:\t0x%X\n", status);
@@ -752,23 +603,24 @@ static const struct file_operations dell_debugfs_fops = {
static void dell_update_rfkill(struct work_struct *ignored)
{
+ struct calling_interface_buffer *buffer;
int hwswitch = 0;
int status;
int ret;
- get_buffer();
+ buffer = dell_smbios_get_buffer();
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
ret = buffer->output[0];
status = buffer->output[1];
if (ret != 0)
goto out;
- clear_buffer();
+ dell_smbios_clear_buffer();
buffer->input[0] = 0x2;
- dell_send_request(buffer, 17, 11);
+ dell_smbios_send_request(17, 11);
ret = buffer->output[0];
if (ret == 0 && (status & BIT(0)))
@@ -776,20 +628,21 @@ static void dell_update_rfkill(struct work_struct *ignored)
if (wifi_rfkill) {
dell_rfkill_update_hw_state(wifi_rfkill, 1, status, hwswitch);
- dell_rfkill_update_sw_state(wifi_rfkill, 1, status);
+ dell_rfkill_update_sw_state(wifi_rfkill, 1, status, buffer);
}
if (bluetooth_rfkill) {
dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status,
hwswitch);
- dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status);
+ dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status,
+ buffer);
}
if (wwan_rfkill) {
dell_rfkill_update_hw_state(wwan_rfkill, 3, status, hwswitch);
- dell_rfkill_update_sw_state(wwan_rfkill, 3, status);
+ dell_rfkill_update_sw_state(wwan_rfkill, 3, status, buffer);
}
out:
- release_buffer();
+ dell_smbios_release_buffer();
}
static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
@@ -833,6 +686,7 @@ static struct notifier_block dell_laptop_rbtn_notifier = {
static int __init dell_setup_rfkill(void)
{
+ struct calling_interface_buffer *buffer;
int status, ret, whitelisted;
const char *product;
@@ -848,11 +702,11 @@ static int __init dell_setup_rfkill(void)
if (!force_rfkill && !whitelisted)
return 0;
- get_buffer();
- dell_send_request(buffer, 17, 11);
+ buffer = dell_smbios_get_buffer();
+ dell_smbios_send_request(17, 11);
ret = buffer->output[0];
status = buffer->output[1];
- release_buffer();
+ dell_smbios_release_buffer();
/* dell wireless info smbios call is not supported */
if (ret != 0)
@@ -1005,51 +859,53 @@ static void dell_cleanup_rfkill(void)
static int dell_send_intensity(struct backlight_device *bd)
{
- int token;
+ struct calling_interface_buffer *buffer;
+ struct calling_interface_token *token;
int ret;
- token = find_token_location(BRIGHTNESS_TOKEN);
- if (token == -1)
+ token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
+ if (!token)
return -ENODEV;
- get_buffer();
- buffer->input[0] = token;
+ buffer = dell_smbios_get_buffer();
+ buffer->input[0] = token->location;
buffer->input[1] = bd->props.brightness;
if (power_supply_is_system_supplied() > 0)
- dell_send_request(buffer, 1, 2);
+ dell_smbios_send_request(1, 2);
else
- dell_send_request(buffer, 1, 1);
+ dell_smbios_send_request(1, 1);
- ret = dell_smi_error(buffer->output[0]);
+ ret = dell_smbios_error(buffer->output[0]);
- release_buffer();
+ dell_smbios_release_buffer();
return ret;
}
static int dell_get_intensity(struct backlight_device *bd)
{
- int token;
+ struct calling_interface_buffer *buffer;
+ struct calling_interface_token *token;
int ret;
- token = find_token_location(BRIGHTNESS_TOKEN);
- if (token == -1)
+ token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
+ if (!token)
return -ENODEV;
- get_buffer();
- buffer->input[0] = token;
+ buffer = dell_smbios_get_buffer();
+ buffer->input[0] = token->location;
if (power_supply_is_system_supplied() > 0)
- dell_send_request(buffer, 0, 2);
+ dell_smbios_send_request(0, 2);
else
- dell_send_request(buffer, 0, 1);
+ dell_smbios_send_request(0, 1);
if (buffer->output[0])
- ret = dell_smi_error(buffer->output[0]);
+ ret = dell_smbios_error(buffer->output[0]);
else
ret = buffer->output[1];
- release_buffer();
+ dell_smbios_release_buffer();
return ret;
}
@@ -1293,17 +1149,18 @@ static bool kbd_led_present;
static int kbd_get_info(struct kbd_info *info)
{
+ struct calling_interface_buffer *buffer;
u8 units;
int ret;
- get_buffer();
+ buffer = dell_smbios_get_buffer();
buffer->input[0] = 0x0;
- dell_send_request(buffer, 4, 11);
+ dell_smbios_send_request(4, 11);
ret = buffer->output[0];
if (ret) {
- ret = dell_smi_error(ret);
+ ret = dell_smbios_error(ret);
goto out;
}
@@ -1323,7 +1180,7 @@ static int kbd_get_info(struct kbd_info *info)
info->days = (buffer->output[3] >> 24) & 0xFF;
out:
- release_buffer();
+ dell_smbios_release_buffer();
return ret;
}
@@ -1382,16 +1239,17 @@ static int kbd_set_level(struct kbd_state *state, u8 level)
static int kbd_get_state(struct kbd_state *state)
{
+ struct calling_interface_buffer *buffer;
int ret;
- get_buffer();
+ buffer = dell_smbios_get_buffer();
buffer->input[0] = 0x1;
- dell_send_request(buffer, 4, 11);
+ dell_smbios_send_request(4, 11);
ret = buffer->output[0];
if (ret) {
- ret = dell_smi_error(ret);
+ ret = dell_smbios_error(ret);
goto out;
}
@@ -1407,15 +1265,16 @@ static int kbd_get_state(struct kbd_state *state)
state->level = (buffer->output[2] >> 16) & 0xFF;
out:
- release_buffer();
+ dell_smbios_release_buffer();
return ret;
}
static int kbd_set_state(struct kbd_state *state)
{
+ struct calling_interface_buffer *buffer;
int ret;
- get_buffer();
+ buffer = dell_smbios_get_buffer();
buffer->input[0] = 0x2;
buffer->input[1] = BIT(state->mode_bit) & 0xFFFF;
buffer->input[1] |= (state->triggers & 0xFF) << 16;
@@ -1423,11 +1282,11 @@ static int kbd_set_state(struct kbd_state *state)
buffer->input[1] |= (state->timeout_unit & 0x3) << 30;
buffer->input[2] = state->als_setting & 0xFF;
buffer->input[2] |= (state->level & 0xFF) << 16;
- dell_send_request(buffer, 4, 11);
+ dell_smbios_send_request(4, 11);
ret = buffer->output[0];
- release_buffer();
+ dell_smbios_release_buffer();
- return dell_smi_error(ret);
+ return dell_smbios_error(ret);
}
static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
@@ -1452,50 +1311,52 @@ static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
static int kbd_set_token_bit(u8 bit)
{
- int id;
+ struct calling_interface_buffer *buffer;
+ struct calling_interface_token *token;
int ret;
if (bit >= ARRAY_SIZE(kbd_tokens))
return -EINVAL;
- id = find_token_id(kbd_tokens[bit]);
- if (id == -1)
+ token = dell_smbios_find_token(kbd_tokens[bit]);
+ if (!token)
return -EINVAL;
- get_buffer();
- buffer->input[0] = da_tokens[id].location;
- buffer->input[1] = da_tokens[id].value;
- dell_send_request(buffer, 1, 0);
+ buffer = dell_smbios_get_buffer();
+ buffer->input[0] = token->location;
+ buffer->input[1] = token->value;
+ dell_smbios_send_request(1, 0);
ret = buffer->output[0];
- release_buffer();
+ dell_smbios_release_buffer();
- return dell_smi_error(ret);
+ return dell_smbios_error(ret);
}
static int kbd_get_token_bit(u8 bit)
{
- int id;
+ struct calling_interface_buffer *buffer;
+ struct calling_interface_token *token;
int ret;
int val;
if (bit >= ARRAY_SIZE(kbd_tokens))
return -EINVAL;
- id = find_token_id(kbd_tokens[bit]);
- if (id == -1)
+ token = dell_smbios_find_token(kbd_tokens[bit]);
+ if (!token)
return -EINVAL;
- get_buffer();
- buffer->input[0] = da_tokens[id].location;
- dell_send_request(buffer, 0, 0);
+ buffer = dell_smbios_get_buffer();
+ buffer->input[0] = token->location;
+ dell_smbios_send_request(0, 0);
ret = buffer->output[0];
val = buffer->output[1];
- release_buffer();
+ dell_smbios_release_buffer();
if (ret)
- return dell_smi_error(ret);
+ return dell_smbios_error(ret);
- return (val == da_tokens[id].value);
+ return (val == token->value);
}
static int kbd_get_first_active_token_bit(void)
@@ -1597,7 +1458,7 @@ static inline void kbd_init_tokens(void)
int i;
for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
- if (find_token_id(kbd_tokens[i]) != -1)
+ if (dell_smbios_find_token(kbd_tokens[i]))
kbd_token_bits |= BIT(i);
}
@@ -2111,8 +1972,9 @@ static void kbd_led_exit(void)
static int __init dell_init(void)
{
+ struct calling_interface_buffer *buffer;
+ struct calling_interface_token *token;
int max_intensity = 0;
- int token;
int ret;
if (!dmi_check_system(dell_device_table))
@@ -2122,13 +1984,6 @@ static int __init dell_init(void)
/* find if this machine support other functions */
dmi_check_system(dell_quirks);
- dmi_walk(find_tokens, NULL);
-
- if (!da_tokens) {
- pr_info("Unable to find dmi tokens\n");
- return -ENODEV;
- }
-
ret = platform_driver_register(&platform_driver);
if (ret)
goto fail_platform_driver;
@@ -2141,16 +1996,6 @@ static int __init dell_init(void)
if (ret)
goto fail_platform_device2;
- /*
- * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
- * is passed to SMI handler.
- */
- buffer = (void *)__get_free_page(GFP_KERNEL | GFP_DMA32);
- if (!buffer) {
- ret = -ENOMEM;
- goto fail_buffer;
- }
-
ret = dell_setup_rfkill();
if (ret) {
@@ -2171,14 +2016,14 @@ static int __init dell_init(void)
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
return 0;
- token = find_token_location(BRIGHTNESS_TOKEN);
- if (token != -1) {
- get_buffer();
- buffer->input[0] = token;
- dell_send_request(buffer, 0, 2);
+ token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
+ if (token) {
+ buffer = dell_smbios_get_buffer();
+ buffer->input[0] = token->location;
+ dell_smbios_send_request(0, 2);
if (buffer->output[0] == 0)
max_intensity = buffer->output[3];
- release_buffer();
+ dell_smbios_release_buffer();
}
if (max_intensity) {
@@ -2208,15 +2053,12 @@ static int __init dell_init(void)
fail_backlight:
dell_cleanup_rfkill();
fail_rfkill:
- free_page((unsigned long)buffer);
-fail_buffer:
platform_device_del(platform_device);
fail_platform_device2:
platform_device_put(platform_device);
fail_platform_device1:
platform_driver_unregister(&platform_driver);
fail_platform_driver:
- kfree(da_tokens);
return ret;
}
@@ -2232,8 +2074,6 @@ static void __exit dell_exit(void)
platform_device_unregister(platform_device);
platform_driver_unregister(&platform_driver);
}
- kfree(da_tokens);
- free_page((unsigned long)buffer);
}
/* dell-rbtn.c driver export functions which will not work correctly (and could
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.