2 * Static Memory Controller
5 #include <linux/module.h>
6 #include <linux/kernel.h>
7 #include <linux/init.h>
9 #include <linux/sysdev.h>
11 #define SMEMC_PHYS_BASE (0x4A000000)
12 #define SMEMC_PHYS_SIZE (0x90)
14 #define MSC0 (0x08) /* Static Memory Controller Register 0 */
15 #define MSC1 (0x0C) /* Static Memory Controller Register 1 */
16 #define SXCNFG (0x1C) /* Synchronous Static Memory Control Register */
17 #define MEMCLKCFG (0x68) /* Clock Configuration */
18 #define CSADRCFG0 (0x80) /* Address Configuration Register for CS0 */
19 #define CSADRCFG1 (0x84) /* Address Configuration Register for CS1 */
20 #define CSADRCFG2 (0x88) /* Address Configuration Register for CS2 */
21 #define CSADRCFG3 (0x8C) /* Address Configuration Register for CS3 */
24 static void __iomem *smemc_mmio_base;
26 static unsigned long msc[2];
27 static unsigned long sxcnfg, memclkcfg;
28 static unsigned long csadrcfg[4];
30 static int pxa3xx_smemc_suspend(struct sys_device *dev, pm_message_t state)
32 msc[0] = __raw_readl(smemc_mmio_base + MSC0);
33 msc[1] = __raw_readl(smemc_mmio_base + MSC1);
34 sxcnfg = __raw_readl(smemc_mmio_base + SXCNFG);
35 memclkcfg = __raw_readl(smemc_mmio_base + MEMCLKCFG);
36 csadrcfg[0] = __raw_readl(smemc_mmio_base + CSADRCFG0);
37 csadrcfg[1] = __raw_readl(smemc_mmio_base + CSADRCFG1);
38 csadrcfg[2] = __raw_readl(smemc_mmio_base + CSADRCFG2);
39 csadrcfg[3] = __raw_readl(smemc_mmio_base + CSADRCFG3);
44 static int pxa3xx_smemc_resume(struct sys_device *dev)
46 __raw_writel(msc[0], smemc_mmio_base + MSC0);
47 __raw_writel(msc[1], smemc_mmio_base + MSC1);
48 __raw_writel(sxcnfg, smemc_mmio_base + SXCNFG);
49 __raw_writel(memclkcfg, smemc_mmio_base + MEMCLKCFG);
50 __raw_writel(csadrcfg[0], smemc_mmio_base + CSADRCFG0);
51 __raw_writel(csadrcfg[1], smemc_mmio_base + CSADRCFG1);
52 __raw_writel(csadrcfg[2], smemc_mmio_base + CSADRCFG2);
53 __raw_writel(csadrcfg[3], smemc_mmio_base + CSADRCFG3);
58 static struct sysdev_class smemc_sysclass = {
60 .suspend = pxa3xx_smemc_suspend,
61 .resume = pxa3xx_smemc_resume,
64 static struct sys_device smemc_sysdev = {
66 .cls = &smemc_sysclass,
69 static int __init smemc_init(void)
73 if (cpu_is_pxa3xx()) {
74 smemc_mmio_base = ioremap(SMEMC_PHYS_BASE, SMEMC_PHYS_SIZE);
75 if (smemc_mmio_base == NULL)
78 ret = sysdev_class_register(&smemc_sysclass);
82 ret = sysdev_register(&smemc_sysdev);
87 subsys_initcall(smemc_init);