89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*
|
|
* Static Memory Controller
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/sysdev.h>
|
|
|
|
#define SMEMC_PHYS_BASE (0x4A000000)
|
|
#define SMEMC_PHYS_SIZE (0x90)
|
|
|
|
#define MSC0 (0x08) /* Static Memory Controller Register 0 */
|
|
#define MSC1 (0x0C) /* Static Memory Controller Register 1 */
|
|
#define SXCNFG (0x1C) /* Synchronous Static Memory Control Register */
|
|
#define MEMCLKCFG (0x68) /* Clock Configuration */
|
|
#define CSADRCFG0 (0x80) /* Address Configuration Register for CS0 */
|
|
#define CSADRCFG1 (0x84) /* Address Configuration Register for CS1 */
|
|
#define CSADRCFG2 (0x88) /* Address Configuration Register for CS2 */
|
|
#define CSADRCFG3 (0x8C) /* Address Configuration Register for CS3 */
|
|
|
|
#ifdef CONFIG_PM
|
|
static void __iomem *smemc_mmio_base;
|
|
|
|
static unsigned long msc[2];
|
|
static unsigned long sxcnfg, memclkcfg;
|
|
static unsigned long csadrcfg[4];
|
|
|
|
static int pxa3xx_smemc_suspend(struct sys_device *dev, pm_message_t state)
|
|
{
|
|
msc[0] = __raw_readl(smemc_mmio_base + MSC0);
|
|
msc[1] = __raw_readl(smemc_mmio_base + MSC1);
|
|
sxcnfg = __raw_readl(smemc_mmio_base + SXCNFG);
|
|
memclkcfg = __raw_readl(smemc_mmio_base + MEMCLKCFG);
|
|
csadrcfg[0] = __raw_readl(smemc_mmio_base + CSADRCFG0);
|
|
csadrcfg[1] = __raw_readl(smemc_mmio_base + CSADRCFG1);
|
|
csadrcfg[2] = __raw_readl(smemc_mmio_base + CSADRCFG2);
|
|
csadrcfg[3] = __raw_readl(smemc_mmio_base + CSADRCFG3);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_smemc_resume(struct sys_device *dev)
|
|
{
|
|
__raw_writel(msc[0], smemc_mmio_base + MSC0);
|
|
__raw_writel(msc[1], smemc_mmio_base + MSC1);
|
|
__raw_writel(sxcnfg, smemc_mmio_base + SXCNFG);
|
|
__raw_writel(memclkcfg, smemc_mmio_base + MEMCLKCFG);
|
|
__raw_writel(csadrcfg[0], smemc_mmio_base + CSADRCFG0);
|
|
__raw_writel(csadrcfg[1], smemc_mmio_base + CSADRCFG1);
|
|
__raw_writel(csadrcfg[2], smemc_mmio_base + CSADRCFG2);
|
|
__raw_writel(csadrcfg[3], smemc_mmio_base + CSADRCFG3);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sysdev_class smemc_sysclass = {
|
|
.name = "smemc",
|
|
.suspend = pxa3xx_smemc_suspend,
|
|
.resume = pxa3xx_smemc_resume,
|
|
};
|
|
|
|
static struct sys_device smemc_sysdev = {
|
|
.id = 0,
|
|
.cls = &smemc_sysclass,
|
|
};
|
|
|
|
static int __init smemc_init(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (cpu_is_pxa3xx()) {
|
|
smemc_mmio_base = ioremap(SMEMC_PHYS_BASE, SMEMC_PHYS_SIZE);
|
|
if (smemc_mmio_base == NULL)
|
|
return -ENODEV;
|
|
|
|
ret = sysdev_class_register(&smemc_sysclass);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = sysdev_register(&smemc_sysdev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
subsys_initcall(smemc_init);
|
|
#endif
|