Merge branch 'master' of git://git.denx.de/u-boot-arm

1 files changed, 117 insertions, 0 deletions

diff --git a/board/davinci/common/psc.c b/board/davinci/common/psc.c
new file mode 100644
index 0000000..00dc07c
--- /dev/null
+++ b/board/davinci/common/psc.c
@@ -0,0 +1,117 @@
+/*
+ * 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(CFG_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 /* CFG_USE_DSPLINK */