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platform/x86: hp-wmi: Standardize enum usage for constants
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Use enums consistently throughout the hp-wmi driver for groups of
related constants. Use hex and align the assignment within groups. Move
the *QUERY constants into an enum, create a new enum defining the READ,
WRITE, and ODM constants and use them instead of 0 and 1 at the call
sites. Set the command directly instead of using the ternary operator
since both 1 and 3 as previously documented would result in the command
being set to 0x2.

Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
Tested-by: Carlo Caione <carlo@endlessm.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
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Darren Hart (VMware) committed Apr 20, 2017
1 parent 3bf9310 commit d8193cf
Showing 1 changed file with 74 additions and 58 deletions.
132 changes: 74 additions & 58 deletions drivers/platform/x86/hp-wmi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -48,41 +48,29 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"

#define HPWMI_DISPLAY_QUERY 0x1
#define HPWMI_HDDTEMP_QUERY 0x2
#define HPWMI_ALS_QUERY 0x3
#define HPWMI_HARDWARE_QUERY 0x4
#define HPWMI_WIRELESS_QUERY 0x5
#define HPWMI_BIOS_QUERY 0x9
#define HPWMI_FEATURE_QUERY 0xb
#define HPWMI_HOTKEY_QUERY 0xc
#define HPWMI_FEATURE2_QUERY 0xd
#define HPWMI_WIRELESS2_QUERY 0x1b
#define HPWMI_POSTCODEERROR_QUERY 0x2a

enum hp_wmi_radio {
HPWMI_WIFI = 0,
HPWMI_BLUETOOTH = 1,
HPWMI_WWAN = 2,
HPWMI_GPS = 3,
HPWMI_WIFI = 0x0,
HPWMI_BLUETOOTH = 0x1,
HPWMI_WWAN = 0x2,
HPWMI_GPS = 0x3,
};

enum hp_wmi_event_ids {
HPWMI_DOCK_EVENT = 1,
HPWMI_PARK_HDD = 2,
HPWMI_SMART_ADAPTER = 3,
HPWMI_BEZEL_BUTTON = 4,
HPWMI_WIRELESS = 5,
HPWMI_CPU_BATTERY_THROTTLE = 6,
HPWMI_LOCK_SWITCH = 7,
HPWMI_LID_SWITCH = 8,
HPWMI_SCREEN_ROTATION = 9,
HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
HPWMI_PROXIMITY_SENSOR = 0x0C,
HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
HPWMI_PEAKSHIFT_PERIOD = 0x0F,
HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
HPWMI_DOCK_EVENT = 0x01,
HPWMI_PARK_HDD = 0x02,
HPWMI_SMART_ADAPTER = 0x03,
HPWMI_BEZEL_BUTTON = 0x04,
HPWMI_WIRELESS = 0x05,
HPWMI_CPU_BATTERY_THROTTLE = 0x06,
HPWMI_LOCK_SWITCH = 0x07,
HPWMI_LID_SWITCH = 0x08,
HPWMI_SCREEN_ROTATION = 0x09,
HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
HPWMI_PROXIMITY_SENSOR = 0x0C,
HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
HPWMI_PEAKSHIFT_PERIOD = 0x0F,
HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
};

struct bios_args {
Expand All @@ -93,6 +81,34 @@ struct bios_args {
u32 data;
};

enum hp_wmi_commandtype {
HPWMI_DISPLAY_QUERY = 0x01,
HPWMI_HDDTEMP_QUERY = 0x02,
HPWMI_ALS_QUERY = 0x03,
HPWMI_HARDWARE_QUERY = 0x04,
HPWMI_WIRELESS_QUERY = 0x05,
HPWMI_BATTERY_QUERY = 0x07,
HPWMI_BIOS_QUERY = 0x09,
HPWMI_FEATURE_QUERY = 0x0b,
HPWMI_HOTKEY_QUERY = 0x0c,
HPWMI_FEATURE2_QUERY = 0x0d,
HPWMI_WIRELESS2_QUERY = 0x1b,
HPWMI_POSTCODEERROR_QUERY = 0x2a,
};

enum hp_wmi_command {
HPWMI_READ = 0x01,
HPWMI_WRITE = 0x02,
HPWMI_ODM = 0x03,
};

#define BIOS_ARGS_INIT(write, ctype, size) \
(struct bios_args) { .signature = 0x55434553, \
.command = (write) ? 0x2 : 0x1, \
.commandtype = (ctype), \
.datasize = (size), \
.data = 0 }

struct bios_return {
u32 sigpass;
u32 return_code;
Expand Down Expand Up @@ -170,8 +186,8 @@ static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
/*
* hp_wmi_perform_query
*
* query: The commandtype -> What should be queried
* write: The command -> 0 read, 1 write, 3 ODM specific
* query: The commandtype (enum hp_wmi_commandtype)
* write: The command (enum hp_wmi_command)
* buffer: Buffer used as input and/or output
* insize: Size of input buffer
* outsize: Size of output buffer
Expand All @@ -182,20 +198,20 @@ static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
* -EINVAL if the output buffer size exceeds buffersize
*
* Note: The buffersize must at least be the maximum of the input and output
* size. E.g. Battery info query (0x7) is defined to have 1 byte input
* size. E.g. Battery info query is defined to have 1 byte input
* and 128 byte output. The caller would do:
* buffer = kzalloc(128, GFP_KERNEL);
* ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
* ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128)
*/
static int hp_wmi_perform_query(int query, int write, void *buffer,
int insize, int outsize)
static int hp_wmi_perform_query(int query, enum hp_wmi_command command,
void *buffer, int insize, int outsize)
{
struct bios_return *bios_return;
int actual_outsize;
union acpi_object *obj;
struct bios_args args = {
.signature = 0x55434553,
.command = write ? 0x2 : 0x1,
.command = command,
.commandtype = query,
.datasize = insize,
.data = 0,
Expand Down Expand Up @@ -245,7 +261,7 @@ static int hp_wmi_perform_query(int query, int write, void *buffer,
static int hp_wmi_display_state(void)
{
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, HPWMI_READ, &state,
sizeof(state), sizeof(state));
if (ret)
return ret < 0 ? ret : -EINVAL;
Expand All @@ -255,7 +271,7 @@ static int hp_wmi_display_state(void)
static int hp_wmi_hddtemp_state(void)
{
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, HPWMI_READ, &state,
sizeof(state), sizeof(state));
if (ret)
return ret < 0 ? ret : -EINVAL;
Expand All @@ -265,7 +281,7 @@ static int hp_wmi_hddtemp_state(void)
static int hp_wmi_als_state(void)
{
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_READ, &state,
sizeof(state), sizeof(state));
if (ret)
return ret < 0 ? ret : -EINVAL;
Expand All @@ -275,7 +291,7 @@ static int hp_wmi_als_state(void)
static int hp_wmi_dock_state(void)
{
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, HPWMI_READ, &state,
sizeof(state), sizeof(state));

if (ret)
Expand All @@ -287,7 +303,7 @@ static int hp_wmi_dock_state(void)
static int hp_wmi_tablet_state(void)
{
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, HPWMI_READ, &state,
sizeof(state), sizeof(state));
if (ret)
return ret < 0 ? ret : -EINVAL;
Expand All @@ -298,7 +314,7 @@ static int hp_wmi_tablet_state(void)
static int __init hp_wmi_bios_2008_later(void)
{
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, 0, &state,
int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, HPWMI_READ, &state,
sizeof(state), sizeof(state));
if (!ret)
return 1;
Expand All @@ -309,7 +325,7 @@ static int __init hp_wmi_bios_2008_later(void)
static int __init hp_wmi_bios_2009_later(void)
{
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, 0, &state,
int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, HPWMI_READ, &state,
sizeof(state), sizeof(state));
if (!ret)
return 1;
Expand All @@ -320,7 +336,7 @@ static int __init hp_wmi_bios_2009_later(void)
static int __init hp_wmi_enable_hotkeys(void)
{
int value = 0x6e;
int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &value,
int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, HPWMI_WRITE, &value,
sizeof(value), 0);
if (ret)
return ret < 0 ? ret : -EINVAL;
Expand All @@ -333,7 +349,7 @@ static int hp_wmi_set_block(void *data, bool blocked)
int query = BIT(r + 8) | ((!blocked) << r);
int ret;

ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE,
&query, sizeof(query), 0);
if (ret)
return ret < 0 ? ret : -EINVAL;
Expand All @@ -349,7 +365,7 @@ static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
int mask = 0x200 << (r * 8);
int wireless = 0;

hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_READ,
&wireless, sizeof(wireless),
sizeof(wireless));
/* TBD: Pass error */
Expand All @@ -365,7 +381,7 @@ static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
int mask = 0x800 << (r * 8);
int wireless = 0;

hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_READ,
&wireless, sizeof(wireless),
sizeof(wireless));
/* TBD: Pass error */
Expand All @@ -381,7 +397,7 @@ static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
int rfkill_id = (int)(long)data;
char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };

if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE,
buffer, sizeof(buffer), 0))
return -EINVAL;
return 0;
Expand All @@ -396,7 +412,7 @@ static int hp_wmi_rfkill2_refresh(void)
struct bios_rfkill2_state state;
int err, i;

err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
0, sizeof(state));
if (err)
return err;
Expand All @@ -423,7 +439,7 @@ static int hp_wmi_rfkill2_refresh(void)
static int hp_wmi_post_code_state(void)
{
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,
int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_READ, &state,
sizeof(state), sizeof(state));
if (ret)
return ret < 0 ? ret : -EINVAL;
Expand Down Expand Up @@ -489,7 +505,7 @@ static ssize_t set_als(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
u32 tmp = simple_strtoul(buf, NULL, 10);
int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
sizeof(tmp), sizeof(tmp));
if (ret)
return ret < 0 ? ret : -EINVAL;
Expand All @@ -510,7 +526,7 @@ static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,

/* Clear the POST error code. It is kept until until cleared. */
tmp = (u32) tmp2;
ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,
ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
sizeof(tmp), sizeof(tmp));
if (ret)
return ret < 0 ? ret : -EINVAL;
Expand Down Expand Up @@ -583,7 +599,7 @@ static void hp_wmi_notify(u32 value, void *context)
case HPWMI_SMART_ADAPTER:
break;
case HPWMI_BEZEL_BUTTON:
ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, HPWMI_READ,
&key_code,
sizeof(key_code),
sizeof(key_code));
Expand Down Expand Up @@ -718,12 +734,12 @@ static int __init hp_wmi_rfkill_setup(struct platform_device *device)
{
int err, wireless = 0;

err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_READ, &wireless,
sizeof(wireless), sizeof(wireless));
if (err)
return err;

err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, &wireless,
err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
sizeof(wireless), 0);
if (err)
return err;
Expand Down Expand Up @@ -803,7 +819,7 @@ static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
struct bios_rfkill2_state state;
int err, i;

err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
0, sizeof(state));
if (err)
return err;
Expand Down

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