[people/ms/u-boot.git] / board / davinci / common / psc.c

/*
 * Power and Sleep Controller (PSC) functions.
 *
 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
 * Copyright (C) 2008 Lyrtech <www.lyrtech.com>
 * Copyright (C) 2004 Texas Instruments.
 *
 * See file CREDITS for list of people who contributed to this
 * 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.
 *
 * 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 <common.h>
#include <asm/arch/hardware.h>

/*
 * The DM6446 includes two separate power domains: "Always On" and "DSP". The
 * "Always On" power domain is always on when the chip is on. The "Always On"
 * domain is powered by the VDD pins of the DM6446. The majority of the
 * DM6446's modules lie within the "Always On" power domain. A separate
 * domain called the "DSP" domain houses the C64x+ and VICP. The "DSP" domain
 * is not always on. The "DSP" power domain is powered by the CVDDDSP pins of
 * the DM6446.
 */

/* Works on Always On power domain only (no PD argument) */
void lpsc_on(unsigned int id)
{
	dv_reg_p mdstat, mdctl;

	if (id >= DAVINCI_LPSC_GEM)
		return;			/* Don't work on DSP Power Domain */

	mdstat = REG_P(PSC_MDSTAT_BASE + (id * 4));
	mdctl = REG_P(PSC_MDCTL_BASE + (id * 4));

	while (REG(PSC_PTSTAT) & 0x01);

	if ((*mdstat & 0x1f) == 0x03)
		return;			/* Already on and enabled */

	*mdctl |= 0x03;

	/* Special treatment for some modules as for sprue14 p.7.4.2 */
	switch (id) {
	case DAVINCI_LPSC_VPSSSLV:
	case DAVINCI_LPSC_EMAC:
	case DAVINCI_LPSC_EMAC_WRAPPER:
	case DAVINCI_LPSC_MDIO:
	case DAVINCI_LPSC_USB:
	case DAVINCI_LPSC_ATA:
	case DAVINCI_LPSC_VLYNQ:
	case DAVINCI_LPSC_UHPI:
	case DAVINCI_LPSC_DDR_EMIF:
	case DAVINCI_LPSC_AEMIF:
	case DAVINCI_LPSC_MMC_SD:
	case DAVINCI_LPSC_MEMSTICK:
	case DAVINCI_LPSC_McBSP:
	case DAVINCI_LPSC_GPIO:
		*mdctl |= 0x200;
		break;
	}

	REG(PSC_PTCMD) = 0x01;

	while (REG(PSC_PTSTAT) & 0x03);
	while ((*mdstat & 0x1f) != 0x03);	/* Probably an overkill... */
}

/* If DSPLINK is used, we don't want U-Boot to power on the DSP. */
#if !defined(CONFIG_SYS_USE_DSPLINK)
void dsp_on(void)
{
	int i;

	if (REG(PSC_PDSTAT1) & 0x1f)
		return;			/* Already on */

	REG(PSC_GBLCTL) |= 0x01;
	REG(PSC_PDCTL1) |= 0x01;
	REG(PSC_PDCTL1) &= ~0x100;
	REG(PSC_MDCTL_BASE + (DAVINCI_LPSC_GEM * 4)) |= 0x03;
	REG(PSC_MDCTL_BASE + (DAVINCI_LPSC_GEM * 4)) &= 0xfffffeff;
	REG(PSC_MDCTL_BASE + (DAVINCI_LPSC_IMCOP * 4)) |= 0x03;
	REG(PSC_MDCTL_BASE + (DAVINCI_LPSC_IMCOP * 4)) &= 0xfffffeff;
	REG(PSC_PTCMD) = 0x02;

	for (i = 0; i < 100; i++) {
		if (REG(PSC_EPCPR) & 0x02)
			break;
	}

	REG(PSC_CHP_SHRTSW) = 0x01;
	REG(PSC_PDCTL1) |= 0x100;
	REG(PSC_EPCCR) = 0x02;

	for (i = 0; i < 100; i++) {
		if (!(REG(PSC_PTSTAT) & 0x02))
			break;
	}

	REG(PSC_GBLCTL) &= ~0x1f;
}
#endif /* CONFIG_SYS_USE_DSPLINK */
Commit	Line	Data
264bbdd1 HV	1	/*
	2	* Power and Sleep Controller (PSC) functions.
	3	*
	4	* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
	5	* Copyright (C) 2008 Lyrtech <www.lyrtech.com>
	6	* Copyright (C) 2004 Texas Instruments.
	7	*
	8	* See file CREDITS for list of people who contributed to this
	9	* project.
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	24	*/
	25
	26	#include <common.h>
	27	#include <asm/arch/hardware.h>
	28
	29	/*
	30	* The DM6446 includes two separate power domains: "Always On" and "DSP". The
	31	* "Always On" power domain is always on when the chip is on. The "Always On"
	32	* domain is powered by the VDD pins of the DM6446. The majority of the
	33	* DM6446's modules lie within the "Always On" power domain. A separate
	34	* domain called the "DSP" domain houses the C64x+ and VICP. The "DSP" domain
	35	* is not always on. The "DSP" power domain is powered by the CVDDDSP pins of
	36	* the DM6446.
	37	*/
	38
	39	/* Works on Always On power domain only (no PD argument) */
	40	void lpsc_on(unsigned int id)
	41	{
	42	dv_reg_p mdstat, mdctl;
	43
	44	if (id >= DAVINCI_LPSC_GEM)
	45	return; /* Don't work on DSP Power Domain */
	46
	47	mdstat = REG_P(PSC_MDSTAT_BASE + (id * 4));
	48	mdctl = REG_P(PSC_MDCTL_BASE + (id * 4));
	49
	50	while (REG(PSC_PTSTAT) & 0x01);
	51
	52	if ((*mdstat & 0x1f) == 0x03)
	53	return; /* Already on and enabled */
	54
	55	*mdctl \|= 0x03;
	56
	57	/* Special treatment for some modules as for sprue14 p.7.4.2 */
	58	switch (id) {
	59	case DAVINCI_LPSC_VPSSSLV:
	60	case DAVINCI_LPSC_EMAC:
	61	case DAVINCI_LPSC_EMAC_WRAPPER:
	62	case DAVINCI_LPSC_MDIO:
	63	case DAVINCI_LPSC_USB:
	64	case DAVINCI_LPSC_ATA:
65	case DAVINCI_LPSC_VLYNQ:
66	case DAVINCI_LPSC_UHPI:
67	case DAVINCI_LPSC_DDR_EMIF:
68	case DAVINCI_LPSC_AEMIF:
69	case DAVINCI_LPSC_MMC_SD:
70	case DAVINCI_LPSC_MEMSTICK:
71	case DAVINCI_LPSC_McBSP:
72	case DAVINCI_LPSC_GPIO:
73	*mdctl \|= 0x200;
74	break;
75	}
76
77	REG(PSC_PTCMD) = 0x01;
78
79	while (REG(PSC_PTSTAT) & 0x03);
80	while ((mdstat & 0x1f) != 0x03); / Probably an overkill... */
81	}
82
83	/* If DSPLINK is used, we don't want U-Boot to power on the DSP. */
6d0f6bcf	84	#if !defined(CONFIG_SYS_USE_DSPLINK)
264bbdd1 HV	85	void dsp_on(void)
	86	{
	87	int i;
	88
	89	if (REG(PSC_PDSTAT1) & 0x1f)
	90	return; /* Already on */
	91
	92	REG(PSC_GBLCTL) \|= 0x01;
	93	REG(PSC_PDCTL1) \|= 0x01;
	94	REG(PSC_PDCTL1) &= ~0x100;
	95	REG(PSC_MDCTL_BASE + (DAVINCI_LPSC_GEM * 4)) \|= 0x03;
	96	REG(PSC_MDCTL_BASE + (DAVINCI_LPSC_GEM * 4)) &= 0xfffffeff;
	97	REG(PSC_MDCTL_BASE + (DAVINCI_LPSC_IMCOP * 4)) \|= 0x03;
	98	REG(PSC_MDCTL_BASE + (DAVINCI_LPSC_IMCOP * 4)) &= 0xfffffeff;
	99	REG(PSC_PTCMD) = 0x02;
	100
	101	for (i = 0; i < 100; i++) {
	102	if (REG(PSC_EPCPR) & 0x02)
	103	break;
	104	}
	105
	106	REG(PSC_CHP_SHRTSW) = 0x01;
	107	REG(PSC_PDCTL1) \|= 0x100;
	108	REG(PSC_EPCCR) = 0x02;
	109
	110	for (i = 0; i < 100; i++) {
	111	if (!(REG(PSC_PTSTAT) & 0x02))
	112	break;
	113	}
	114
	115	REG(PSC_GBLCTL) &= ~0x1f;
	116	}
6d0f6bcf	117	#endif /* CONFIG_SYS_USE_DSPLINK */