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iichid(4): Add support for ASUS C300 chromebook.

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Some chromebooks e.g. ASUS C300 have no valid _CID and _DSM ACPI
objects required for device identification and HID descriptor address
detection. Add quirk to allow required data to be hardcoded in to
driver.

MFC after:	2 month
This commit is contained in:
Vladimir Kondratyev 2022-03-03 02:35:23 +03:00
parent 6b1da3d223
commit 34e051c45c
1 changed files with 31 additions and 16 deletions
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47
sys/dev/iicbus/iichid.c
View file

@ -130,10 +130,18 @@ struct i2c_hid_desc {
uint32_t reserved;
} __packed;
static char *iichid_ids[] = {
"PNP0C50",
"ACPI0C50",
NULL
#define IICHID_REG_NONE -1
#define IICHID_REG_ACPI (UINT16_MAX + 1)
#define IICHID_REG_ELAN 0x0001
static const struct iichid_id {
char *id;
int reg;
} iichid_ids[] = {
{ "ELAN0000", IICHID_REG_ELAN },
{ "PNP0C50", IICHID_REG_ACPI },
{ "ACPI0C50", IICHID_REG_ACPI },
{ NULL, 0 },
};
enum iichid_powerstate_how {
@ -197,18 +205,21 @@ static int iichid_reset_callout(struct iichid_softc *);
static void iichid_teardown_callout(struct iichid_softc *);
#endif
static __inline bool
static inline int
acpi_is_iichid(ACPI_HANDLE handle)
{
char **ids;
const struct iichid_id *ids;
UINT32 sta;
int reg;
for (ids = iichid_ids; *ids != NULL; ids++) {
if (acpi_MatchHid(handle, *ids))
for (ids = iichid_ids; ids->id != NULL; ids++) {
if (acpi_MatchHid(handle, ids->id)) {
reg = ids->reg;
break;
}
}
if (*ids == NULL)
return (false);
if (ids->id == NULL)
return (IICHID_REG_NONE);
/*
* If no _STA method or if it failed, then assume that
@ -216,9 +227,9 @@ acpi_is_iichid(ACPI_HANDLE handle)
*/
if (ACPI_FAILURE(acpi_GetInteger(handle, "_STA", &sta)) ||
ACPI_DEVICE_PRESENT(sta))
return (true);
return (reg);
return (false);
return (IICHID_REG_NONE);
}
static ACPI_STATUS
@ -1007,7 +1018,7 @@ iichid_probe(device_t dev)
ACPI_HANDLE handle;
char buf[80];
uint16_t config_reg;
int error;
int error, reg;
sc = device_get_softc(dev);
sc->dev = dev;
@ -1028,11 +1039,15 @@ iichid_probe(device_t dev)
if (handle == NULL)
return (ENXIO);
if (!acpi_is_iichid(handle))
reg = acpi_is_iichid(handle);
if (reg == IICHID_REG_NONE)
return (ENXIO);
if (ACPI_FAILURE(iichid_get_config_reg(handle, &config_reg)))
return (ENXIO);
if (reg == IICHID_REG_ACPI) {
if (ACPI_FAILURE(iichid_get_config_reg(handle, &config_reg)))
return (ENXIO);
} else
config_reg = (uint16_t)reg;
DPRINTF(sc, " IICbus addr : 0x%02X\n", sc->addr >> 1);
DPRINTF(sc, " HID descriptor reg: 0x%02X\n", config_reg);