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/* This file is part of the coreboot project. */
/*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#define R_ICLK_PCR_CAMERA1 0x8000
#define B_ICLK_PCR_FREQUENCY 0x1
#define B_ICLK_PCR_REQUEST 0x2
/* The clock control registers for each IMGCLK are offset by 0xC */
#define B_ICLK_PCR_OFFSET 0xC
Scope (\_SB.PCI0) {
/* IsCLK PCH base register for clock settings */
Name (ICKB, 0)
Store (PCRB (PID_ISCLK) + R_ICLK_PCR_CAMERA1, ICKB)
/*
* Arg0 : Clock Number
* Return : Offset of register to control the clock in Arg0
*
*/
Method (OFST, 0x1, NotSerialized)
{
Return (ICKB + (Arg0 * B_ICLK_PCR_OFFSET))
}
/*
* Helper function for Read And OR Write
* Arg0 : source and destination
* Arg1 : And data
* Arg2 : Or data
*/
Method (RAOW, 0x3, Serialized)
{
OperationRegion (ICLK, SystemMemory, OFST(Arg0), 4)
Field (ICLK, AnyAcc, NoLock, Preserve)
{
VAL0, 32
}
Local0 = VAL0
VAL0 = Local0 & Arg1 | Arg2
}
/*
* Clock control Method
* Arg0: Clock source select(0: IMGCLKOUT_0, 1: IMGCLKOUT_1, 2: IMGCLKOUT_2, 3: IMGCLKOUT_3,
* 4: IMGCLKOUT_4, 5: IMGCLKOUT_5)
* Arg1: Select 24MHz / 19.2 MHz (0: 24MHz, 1: 19.2MHz)
*/
Method (MCON, 0x2, NotSerialized)
{
/* Set Clock Frequency */
RAOW (Arg0, ~B_ICLK_PCR_FREQUENCY, Arg1)
/* Enable Clock */
RAOW (Arg0, ~B_ICLK_PCR_REQUEST, B_ICLK_PCR_REQUEST)
}
Method (MCOF, 0x1, NotSerialized)
{
/* Disable Clock */
RAOW (Arg0, ~B_ICLK_PCR_REQUEST, 0)
}
}
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