/*
* TI DaVinci Power and Sleep Controller (PSC)
*
* Copyright (C) 2006 Texas Instruments.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/arch/psc.h>
#define PTCMD __REG(0x01C41120)
#define PDSTAT __REG(0x01C41200)
#define PDCTL1 __REG(0x01C41304)
#define EPCPR __REG(0x01C41070)
#define PTSTAT __REG(0x01C41128)
#define MDSTAT IO_ADDRESS(0x01C41800)
#define MDCTL IO_ADDRESS(0x01C41A00)
#define PINMUX0 __REG(0x01c40000)
#define PINMUX1 __REG(0x01c40004)
#define VDD3P3V_PWDN __REG(0x01C40048)
static void davinci_psc_mux(unsigned int id)
{
switch (id) {
case DAVINCI_LPSC_ATA:
PINMUX0 |= (1 << 17) | (1 << 16);
break;
case DAVINCI_LPSC_MMC_SD:
/* VDD power manupulations are done in U-Boot for CPMAC
* so applies to MMC as well
*/
/*Set up the pull regiter for MMC */
VDD3P3V_PWDN = 0x0;
PINMUX1 &= (~(1 << 9));
break;
case DAVINCI_LPSC_I2C:
PINMUX1 |= (1 << 7);
break;
case DAVINCI_LPSC_McBSP:
PINMUX1 |= (1 << 10);
break;
default:
break;
}
}
/* Enable or disable a PSC domain */
void davinci_psc_config(unsigned int domain, unsigned int id, char enable)
{
volatile unsigned int *mdstat = (unsigned int *)((int)MDSTAT + 4 * id);
volatile unsigned int *mdctl = (unsigned int *)((int)MDCTL + 4 * id);
if (id < 0)
return;
if (enable)
*mdctl |= 0x00000003; /* Enable Module */
else
*mdctl &= 0xFFFFFFF2; /* Disable Module */
if ((PDSTAT & 0x00000001) == 0) {
PDCTL1 |= 0x1;
PTCMD = (1 << domain);
while ((((EPCPR >> domain) & 1) == 0));
PDCTL1 |= 0x100;
while (!(((PTSTAT >> domain) & 1) == 0));
} else {
PTCMD = (1 << domain);
while (!(((PTSTAT >> domain) & 1) == 0));
}
if (enable)
while (!((*mdstat & 0x0000001F) == 0x3));
else
while (!((*mdstat & 0x0000001F) == 0x2));
if (enable)
davinci_psc_mux(id);
}
void __init davinci_psc_init(void)
{
davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_VPSSMSTR, 1);
davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_VPSSSLV, 1);
davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TPCC, 1);
davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TPTC0, 1);
davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TPTC1, 1);
davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_GPIO, 1);
/* Turn on WatchDog timer LPSC. Needed for RESET to work */
davinci_psc_config(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TIMER2, 1);
}
