mirror of https://gitee.com/openkylin/linux.git
252 lines
6.2 KiB
C
252 lines
6.2 KiB
C
#include <linux/init.h>
|
|
#include <linux/suspend.h>
|
|
#include <asm/io.h>
|
|
#include <asm/time.h>
|
|
#include <asm/mpc52xx.h>
|
|
|
|
/* defined in lite5200_sleep.S and only used here */
|
|
extern void lite5200_low_power(void __iomem *sram, void __iomem *mbar);
|
|
|
|
static struct mpc52xx_cdm __iomem *cdm;
|
|
static struct mpc52xx_intr __iomem *pic;
|
|
static struct mpc52xx_sdma __iomem *bes;
|
|
static struct mpc52xx_xlb __iomem *xlb;
|
|
static struct mpc52xx_gpio __iomem *gps;
|
|
static struct mpc52xx_gpio_wkup __iomem *gpw;
|
|
static void __iomem *pci;
|
|
static void __iomem *sram;
|
|
static const int sram_size = 0x4000; /* 16 kBytes */
|
|
static void __iomem *mbar;
|
|
|
|
static suspend_state_t lite5200_pm_target_state;
|
|
|
|
static int lite5200_pm_valid(suspend_state_t state)
|
|
{
|
|
switch (state) {
|
|
case PM_SUSPEND_STANDBY:
|
|
case PM_SUSPEND_MEM:
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int lite5200_pm_begin(suspend_state_t state)
|
|
{
|
|
if (lite5200_pm_valid(state)) {
|
|
lite5200_pm_target_state = state;
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int lite5200_pm_prepare(void)
|
|
{
|
|
struct device_node *np;
|
|
const struct of_device_id immr_ids[] = {
|
|
{ .compatible = "fsl,mpc5200-immr", },
|
|
{ .compatible = "fsl,mpc5200b-immr", },
|
|
{ .type = "soc", .compatible = "mpc5200", }, /* lite5200 */
|
|
{ .type = "builtin", .compatible = "mpc5200", }, /* efika */
|
|
{}
|
|
};
|
|
u64 regaddr64 = 0;
|
|
const u32 *regaddr_p;
|
|
|
|
/* deep sleep? let mpc52xx code handle that */
|
|
if (lite5200_pm_target_state == PM_SUSPEND_STANDBY)
|
|
return mpc52xx_pm_prepare();
|
|
|
|
if (lite5200_pm_target_state != PM_SUSPEND_MEM)
|
|
return -EINVAL;
|
|
|
|
/* map registers */
|
|
np = of_find_matching_node(NULL, immr_ids);
|
|
regaddr_p = of_get_address(np, 0, NULL, NULL);
|
|
if (regaddr_p)
|
|
regaddr64 = of_translate_address(np, regaddr_p);
|
|
of_node_put(np);
|
|
|
|
mbar = ioremap((u32) regaddr64, 0xC000);
|
|
if (!mbar) {
|
|
printk(KERN_ERR "%s:%i Error mapping registers\n", __func__, __LINE__);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
cdm = mbar + 0x200;
|
|
pic = mbar + 0x500;
|
|
gps = mbar + 0xb00;
|
|
gpw = mbar + 0xc00;
|
|
pci = mbar + 0xd00;
|
|
bes = mbar + 0x1200;
|
|
xlb = mbar + 0x1f00;
|
|
sram = mbar + 0x8000;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* save and restore registers not bound to any real devices */
|
|
static struct mpc52xx_cdm scdm;
|
|
static struct mpc52xx_intr spic;
|
|
static struct mpc52xx_sdma sbes;
|
|
static struct mpc52xx_xlb sxlb;
|
|
static struct mpc52xx_gpio sgps;
|
|
static struct mpc52xx_gpio_wkup sgpw;
|
|
static char spci[0x200];
|
|
|
|
static void lite5200_save_regs(void)
|
|
{
|
|
_memcpy_fromio(&spic, pic, sizeof(*pic));
|
|
_memcpy_fromio(&sbes, bes, sizeof(*bes));
|
|
_memcpy_fromio(&scdm, cdm, sizeof(*cdm));
|
|
_memcpy_fromio(&sxlb, xlb, sizeof(*xlb));
|
|
_memcpy_fromio(&sgps, gps, sizeof(*gps));
|
|
_memcpy_fromio(&sgpw, gpw, sizeof(*gpw));
|
|
_memcpy_fromio(spci, pci, 0x200);
|
|
|
|
_memcpy_fromio(saved_sram, sram, sram_size);
|
|
}
|
|
|
|
static void lite5200_restore_regs(void)
|
|
{
|
|
int i;
|
|
_memcpy_toio(sram, saved_sram, sram_size);
|
|
|
|
/* PCI Configuration */
|
|
_memcpy_toio(pci, spci, 0x200);
|
|
|
|
/*
|
|
* GPIOs. Interrupt Master Enable has higher address then other
|
|
* registers, so just memcpy is ok.
|
|
*/
|
|
_memcpy_toio(gpw, &sgpw, sizeof(*gpw));
|
|
_memcpy_toio(gps, &sgps, sizeof(*gps));
|
|
|
|
|
|
/* XLB Arbitrer */
|
|
out_be32(&xlb->snoop_window, sxlb.snoop_window);
|
|
out_be32(&xlb->master_priority, sxlb.master_priority);
|
|
out_be32(&xlb->master_pri_enable, sxlb.master_pri_enable);
|
|
|
|
/* enable */
|
|
out_be32(&xlb->int_enable, sxlb.int_enable);
|
|
out_be32(&xlb->config, sxlb.config);
|
|
|
|
|
|
/* CDM - Clock Distribution Module */
|
|
out_8(&cdm->ipb_clk_sel, scdm.ipb_clk_sel);
|
|
out_8(&cdm->pci_clk_sel, scdm.pci_clk_sel);
|
|
|
|
out_8(&cdm->ext_48mhz_en, scdm.ext_48mhz_en);
|
|
out_8(&cdm->fd_enable, scdm.fd_enable);
|
|
out_be16(&cdm->fd_counters, scdm.fd_counters);
|
|
|
|
out_be32(&cdm->clk_enables, scdm.clk_enables);
|
|
|
|
out_8(&cdm->osc_disable, scdm.osc_disable);
|
|
|
|
out_be16(&cdm->mclken_div_psc1, scdm.mclken_div_psc1);
|
|
out_be16(&cdm->mclken_div_psc2, scdm.mclken_div_psc2);
|
|
out_be16(&cdm->mclken_div_psc3, scdm.mclken_div_psc3);
|
|
out_be16(&cdm->mclken_div_psc6, scdm.mclken_div_psc6);
|
|
|
|
|
|
/* BESTCOMM */
|
|
out_be32(&bes->taskBar, sbes.taskBar);
|
|
out_be32(&bes->currentPointer, sbes.currentPointer);
|
|
out_be32(&bes->endPointer, sbes.endPointer);
|
|
out_be32(&bes->variablePointer, sbes.variablePointer);
|
|
|
|
out_8(&bes->IntVect1, sbes.IntVect1);
|
|
out_8(&bes->IntVect2, sbes.IntVect2);
|
|
out_be16(&bes->PtdCntrl, sbes.PtdCntrl);
|
|
|
|
for (i=0; i<32; i++)
|
|
out_8(&bes->ipr[i], sbes.ipr[i]);
|
|
|
|
out_be32(&bes->cReqSelect, sbes.cReqSelect);
|
|
out_be32(&bes->task_size0, sbes.task_size0);
|
|
out_be32(&bes->task_size1, sbes.task_size1);
|
|
out_be32(&bes->MDEDebug, sbes.MDEDebug);
|
|
out_be32(&bes->ADSDebug, sbes.ADSDebug);
|
|
out_be32(&bes->Value1, sbes.Value1);
|
|
out_be32(&bes->Value2, sbes.Value2);
|
|
out_be32(&bes->Control, sbes.Control);
|
|
out_be32(&bes->Status, sbes.Status);
|
|
out_be32(&bes->PTDDebug, sbes.PTDDebug);
|
|
|
|
/* restore tasks */
|
|
for (i=0; i<16; i++)
|
|
out_be16(&bes->tcr[i], sbes.tcr[i]);
|
|
|
|
/* enable interrupts */
|
|
out_be32(&bes->IntPend, sbes.IntPend);
|
|
out_be32(&bes->IntMask, sbes.IntMask);
|
|
|
|
|
|
/* PIC */
|
|
out_be32(&pic->per_pri1, spic.per_pri1);
|
|
out_be32(&pic->per_pri2, spic.per_pri2);
|
|
out_be32(&pic->per_pri3, spic.per_pri3);
|
|
|
|
out_be32(&pic->main_pri1, spic.main_pri1);
|
|
out_be32(&pic->main_pri2, spic.main_pri2);
|
|
|
|
out_be32(&pic->enc_status, spic.enc_status);
|
|
|
|
/* unmask and enable interrupts */
|
|
out_be32(&pic->per_mask, spic.per_mask);
|
|
out_be32(&pic->main_mask, spic.main_mask);
|
|
out_be32(&pic->ctrl, spic.ctrl);
|
|
}
|
|
|
|
static int lite5200_pm_enter(suspend_state_t state)
|
|
{
|
|
/* deep sleep? let mpc52xx code handle that */
|
|
if (state == PM_SUSPEND_STANDBY) {
|
|
return mpc52xx_pm_enter(state);
|
|
}
|
|
|
|
lite5200_save_regs();
|
|
|
|
/* effectively save FP regs */
|
|
enable_kernel_fp();
|
|
|
|
lite5200_low_power(sram, mbar);
|
|
|
|
lite5200_restore_regs();
|
|
|
|
/* restart jiffies */
|
|
wakeup_decrementer();
|
|
|
|
iounmap(mbar);
|
|
return 0;
|
|
}
|
|
|
|
static void lite5200_pm_finish(void)
|
|
{
|
|
/* deep sleep? let mpc52xx code handle that */
|
|
if (lite5200_pm_target_state == PM_SUSPEND_STANDBY)
|
|
mpc52xx_pm_finish();
|
|
}
|
|
|
|
static void lite5200_pm_end(void)
|
|
{
|
|
lite5200_pm_target_state = PM_SUSPEND_ON;
|
|
}
|
|
|
|
static struct platform_suspend_ops lite5200_pm_ops = {
|
|
.valid = lite5200_pm_valid,
|
|
.begin = lite5200_pm_begin,
|
|
.prepare = lite5200_pm_prepare,
|
|
.enter = lite5200_pm_enter,
|
|
.finish = lite5200_pm_finish,
|
|
.end = lite5200_pm_end,
|
|
};
|
|
|
|
int __init lite5200_pm_init(void)
|
|
{
|
|
suspend_set_ops(&lite5200_pm_ops);
|
|
return 0;
|
|
}
|