+++ /dev/null
-/*
- * 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>
-#include <asm/io.h>
-
-/*
- * The PSC manages three inputs to a "module" which may be a peripheral or
- * CPU. Those inputs are the module's: clock; reset signal; and sometimes
- * its power domain. For our purposes, we only care whether clock and power
- * are active, and the module is out of reset.
- *
- * DaVinci chips may include two separate power domains: "Always On" and "DSP".
- * Chips without a DSP generally have only one domain.
- *
- * The "Always On" power domain is always on when the chip is on, and is
- * powered by the VDD pins (on DM644X). The majority of DaVinci modules
- * lie within the "Always On" power domain.
- *
- * A separate domain called the "DSP" domain houses the C64x+ and other video
- * hardware such as VICP. In some chips, the "DSP" domain is not always on.
- * The "DSP" power domain is powered by the CVDDDSP pins (on DM644X).
- */
-
-/* Works on Always On power domain only (no PD argument) */
-void lpsc_on(unsigned int id)
-{
- dv_reg_p mdstat, mdctl, ptstat, ptcmd;
-#ifdef CONFIG_SOC_DA8XX
- struct davinci_psc_regs *psc_regs;
-#endif
-
-#ifndef CONFIG_SOC_DA8XX
- 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));
- ptstat = REG_P(PSC_PTSTAT);
- ptcmd = REG_P(PSC_PTCMD);
-#else
- if (id < DAVINCI_LPSC_PSC1_BASE) {
- if (id >= PSC_PSC0_MODULE_ID_CNT)
- return;
- psc_regs = davinci_psc0_regs;
- mdstat = &psc_regs->psc0.mdstat[id];
- mdctl = &psc_regs->psc0.mdctl[id];
- } else {
- id -= DAVINCI_LPSC_PSC1_BASE;
- if (id >= PSC_PSC1_MODULE_ID_CNT)
- return;
- psc_regs = davinci_psc1_regs;
- mdstat = &psc_regs->psc1.mdstat[id];
- mdctl = &psc_regs->psc1.mdctl[id];
- }
- ptstat = &psc_regs->ptstat;
- ptcmd = &psc_regs->ptcmd;
-#endif
-
- while (readl(ptstat) & 0x01)
- continue;
-
- if ((readl(mdstat) & 0x1f) == 0x03)
- return; /* Already on and enabled */
-
- writel(readl(mdctl) | 0x03, mdctl);
-
- switch (id) {
-#ifdef CONFIG_SOC_DM644X
- /* Special treatment for some modules as for sprue14 p.7.4.2 */
- 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:
- writel(readl(mdctl) | 0x200, mdctl);
- break;
-#endif
- }
-
- writel(0x01, ptcmd);
-
- while (readl(ptstat) & 0x01)
- continue;
- while ((readl(mdstat) & 0x1f) != 0x03)
- continue;
-}
-
-/* Not all DaVinci chips have a DSP power domain. */
-#ifdef CONFIG_SOC_DM644X
-
-/* 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 */
-
-#endif /* have a DSP */
projects / u-boot / blobdiff