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ACPI: ibm-acpi: cleanup fan_write 

This patch cleans up fan_write so that it is much easier to read and
extend.  It separates the proc api handling from the operations themselves.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
This commit is contained in:
Henrique de Moraes Holschuh 2006-11-24 11:47:11 -02:00 committed by Len Brown
parent c52f0aa574
commit 18ad7996e1
1 changed files with 125 additions and 22 deletions
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147
drivers/acpi/ibm_acpi.c
View File

@ -1843,38 +1843,141 @@ static int fan_read(char *p)
return len;
}
static int fan_write(char *buf)
static int fan_set_level(int level)
{
char *cmd;
int level, speed;
while ((cmd = next_cmd(&buf))) {
if (sfan_handle &&
sscanf(cmd, "level %d", &level) == 1 &&
level >= 0 && level <= 7) {
/* 570, 770x-JL */
switch (fan_control_access_mode) {
case IBMACPI_FAN_WR_ACPI_SFAN:
if (level >= 0 && level <= 7) {
if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
return -EIO;
} else if (!gfan_handle && strlencmp(cmd, "enable") == 0) {
/* all except 570, 600e/x, 770e, 770x */
if (!acpi_ec_write(fan_status_offset, 0x80))
return -EIO;
} else if (!gfan_handle && strlencmp(cmd, "disable") == 0) {
/* all except 570, 600e/x, 770e, 770x */
if (!acpi_ec_write(fan_status_offset, 0x00))
return -EIO;
} else if (fans_handle &&
sscanf(cmd, "speed %d", &speed) == 1 &&
speed >= 0 && speed <= 65535) {
/* X31, X40 */
} else
return -EINVAL;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_set_enable(void)
{
switch (fan_control_access_mode) {
case IBMACPI_FAN_WR_ACPI_FANS:
case IBMACPI_FAN_WR_TPEC:
if (!acpi_ec_write(fan_status_offset, 0x80))
return -EIO;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_set_disable(void)
{
switch (fan_control_access_mode) {
case IBMACPI_FAN_WR_ACPI_FANS:
case IBMACPI_FAN_WR_TPEC:
if (!acpi_ec_write(fan_status_offset, 0x00))
return -EIO;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_set_speed(int speed)
{
switch (fan_control_access_mode) {
case IBMACPI_FAN_WR_ACPI_FANS:
if (speed >= 0 && speed <= 65535) {
if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
speed, speed, speed))
return -EIO;
} else
return -EINVAL;
break;
default:
return -ENXIO;
}
return 0;
}
static int fan_write_cmd_level(const char *cmd, int *rc)
{
int level;
if (sscanf(cmd, "level %d", &level) != 1)
return 0;
if ((*rc = fan_set_level(level)) == -ENXIO)
printk(IBM_ERR "level command accepted for unsupported "
"access mode %d", fan_control_access_mode);
return 1;
}
static int fan_write_cmd_enable(const char *cmd, int *rc)
{
if (strlencmp(cmd, "enable") != 0)
return 0;
if ((*rc = fan_set_enable()) == -ENXIO)
printk(IBM_ERR "enable command accepted for unsupported "
"access mode %d", fan_control_access_mode);
return 1;
}
static int fan_write_cmd_disable(const char *cmd, int *rc)
{
if (strlencmp(cmd, "disable") != 0)
return 0;
if ((*rc = fan_set_disable()) == -ENXIO)
printk(IBM_ERR "disable command accepted for unsupported "
"access mode %d", fan_control_access_mode);
return 1;
}
static int fan_write_cmd_speed(const char *cmd, int *rc)
{
int speed;
if (sscanf(cmd, "speed %d", &speed) != 1)
return 0;
if ((*rc = fan_set_speed(speed)) == -ENXIO)
printk(IBM_ERR "speed command accepted for unsupported "
"access mode %d", fan_control_access_mode);
return 1;
}
static int fan_write(char *buf)
{
char *cmd;
int rc = 0;
while (!rc && (cmd = next_cmd(&buf))) {
if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
fan_write_cmd_level(cmd, &rc)) &&
!((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
(fan_write_cmd_enable(cmd, &rc) ||
fan_write_cmd_disable(cmd, &rc))) &&
!((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
fan_write_cmd_speed(cmd, &rc))
)
rc = -EINVAL;
}
return 0;
return rc;
}
static struct ibm_struct ibms[] = {