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/* SPDX-License-Identifier: GPL-2.0-only */
#include <soc/pcr_ids.h>
Scope (\_SB.PCI0) {
/*
* Clear register 0x1C20/0x4820
* Arg0 - PCR Port ID
*/
Method(SCSC, 1, Serialized)
{
PCRA (Arg0, 0x1C20, 0x0)
PCRA (Arg0, 0x4820, 0x0)
}
/* EMMC */
Device(PEMC) {
Name(_ADR, 0x001A0000)
Name (_DDN, "eMMC Controller")
Name (TEMP, 0)
OperationRegion(SCSR, PCI_Config, 0x00, 0x100)
Field(SCSR, WordAcc, NoLock, Preserve) {
Offset (0x84), /* PMECTRLSTATUS */
PMCR, 16,
Offset (0xA2), /* PG_CONFIG */
, 2,
PGEN, 1, /* PG_ENABLE */
}
Method(_INI) {
/* Clear register 0x1C20/0x4820 */
SCSC (PID_EMMC)
}
Method(_PS0, 0, Serialized) {
Stall (50) // Sleep 50 us
PGEN = 0 // Disable PG
/* Clear register 0x1C20/0x4820 */
SCSC (PID_EMMC)
/* Set Power State to D0 */
PMCR = PMCR & 0xFFFC
TEMP = PMCR
}
Method(_PS3, 0, Serialized) {
PGEN = 1 // Enable PG
/* Set Power State to D3 */
PMCR = PMCR | 0x0003
TEMP = PMCR
}
Device (CARD)
{
Name (_ADR, 0x00000008)
Method (_RMV, 0, NotSerialized)
{
Return (0)
}
}
}
/* SD CARD */
Device (SDXC)
{
Name (_ADR, 0x001A0001)
Name (_DDN, "SD Controller")
Name (TEMP, 0)
Name (DSUU, ToUUID("f6c13ea5-65cd-461f-ab7a-29f7e8d5bd61"))
OperationRegion (SDPC, PCI_Config, 0x00, 0x100)
Field (SDPC, WordAcc, NoLock, Preserve)
{
Offset (0x84), /* PMECTRLSTATUS */
PMCR, 16,
Offset (0xA2), /* PG_CONFIG */
, 2,
PGEN, 1, /* PG_ENABLE */
}
/*
* _DSM x86 Device Specific Method
* Arg0: UUID Unique function identifier
* Arg1: Integer Revision Level
* Arg2: Integer Function Index (0 = Return Supported Functions)
* Arg3: Package Parameters
*/
Method (_DSM, 4)
{
If (Arg0 == DSUU) {
/* Check the revision */
If (Arg1 >= 0) {
/*
* Function Index 0 the return value is a buffer containing
* one bit for each function index, starting with zero.
* Bit 0 - Indicates whether there is support for any
* functions other than function 0.
* Bit 1 - Indicates support to clear power control register
* Bit 2 - Indicates support to set power control register
* Bit 3 - Indicates support to set 1.8V signalling
* Bit 4 - Indicates support to set 3.3V signalling
* Bit 5 - Indicates support for HS200 mode
* Bit 6 - Indicates support for HS400 mode
* Bit 9 - Indicates eMMC I/O Driver Strength
*/
/*
* For SD we have to support functions to
* set 1.8V signalling and 3.3V signalling [BIT4, BIT3]
*/
If (Arg2 == 0) {
Return (Buffer () { 0x19 })
}
/*
* Function Index 3: Set 1.8v signalling.
* We put a sleep of 100ms in this method to
* work around a known issue with detecting
* UHS SD card on PCH. This is to compensate
* for the SD VR slowness.
*/
If (Arg2 == 3) {
Sleep (100)
Return(Buffer () { 0x00 })
}
/*
* Function Index 4: Set 3.3v signalling.
* We put a sleep of 100ms in this method to
* work around a known issue with detecting
* UHS SD card on PCH. This is to compensate
* for the SD VR slowness.
*/
If (Arg2 == 4) {
Sleep (100)
Return(Buffer () { 0x00 })
}
}
}
Return(Buffer() { 0x0 })
}
Method(_INI)
{
/* Clear register 0x1C20/0x4820 */
SCSC (PID_SDX)
}
Method (_PS0, 0, Serialized)
{
PGEN = 0 /* Disable PG */
/* Clear register 0x1C20/0x4820 */
SCSC (PID_SDX)
/* Set Power State to D0 */
PMCR = PMCR & 0xFFFC
TEMP = PMCR
/* Change pad mode to Native */
GPMO(SD_PWR_EN_PIN, 0x1)
}
Method (_PS3, 0, Serialized)
{
PGEN = 1 /* Enable PG */
/* Set Power State to D3 */
PMCR = PMCR | 0x0003
TEMP = PMCR
/* Change pad mode to GPIO control */
GPMO(SD_PWR_EN_PIN, 0x0)
/* Enable Tx Buffer */
GTXE(SD_PWR_EN_PIN, 0x1)
/* Drive TX to zero */
CTXS(SD_PWR_EN_PIN)
}
Device (CARD)
{
Name (_ADR, 0x00000008)
Method (_RMV, 0, NotSerialized)
{
Return (1)
}
}
} /* Device (SDXC) */
}
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