mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 00:21:06 +00:00
cef443c166
The support for DaVinci DM* SoCs has been dropped a while ago. There's still a lot of leftover code in mach-davinci though. Entirely remove certain files and modify the common code to no longer reference unsupported chips. Note: all DaVinci platforms supported in u-boot now define SOC_DA8XX but not all define SOC_DA850 (e.g. omapl138). We can safely remove all ifdefs for the former, but let's leave the ones for the latter. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
#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) */
|
|
static void lpsc_transition(unsigned int id, unsigned int state)
|
|
{
|
|
dv_reg_p mdstat, mdctl, ptstat, ptcmd;
|
|
struct davinci_psc_regs *psc_regs;
|
|
|
|
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;
|
|
|
|
while (readl(ptstat) & 0x01)
|
|
continue;
|
|
|
|
if ((readl(mdstat) & PSC_MDSTAT_STATE) == state)
|
|
return; /* Already in that state */
|
|
|
|
writel((readl(mdctl) & ~PSC_MDCTL_NEXT) | state, mdctl);
|
|
writel(0x01, ptcmd);
|
|
|
|
while (readl(ptstat) & 0x01)
|
|
continue;
|
|
while ((readl(mdstat) & PSC_MDSTAT_STATE) != state)
|
|
continue;
|
|
}
|
|
|
|
void lpsc_on(unsigned int id)
|
|
{
|
|
lpsc_transition(id, 0x03);
|
|
}
|
|
|
|
void lpsc_syncreset(unsigned int id)
|
|
{
|
|
lpsc_transition(id, 0x01);
|
|
}
|
|
|
|
void lpsc_disable(unsigned int id)
|
|
{
|
|
lpsc_transition(id, 0x0);
|
|
}
|