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Diffstat (limited to 'cpu/arm926ejs/davinci/psc.c')
| -rw-r--r-- | cpu/arm926ejs/davinci/psc.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/cpu/arm926ejs/davinci/psc.c b/cpu/arm926ejs/davinci/psc.c deleted file mode 100644 index 8273a7fae4..0000000000 --- a/cpu/arm926ejs/davinci/psc.c +++ /dev/null @@ -1,160 +0,0 @@ -/* - * 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 */ |