1 /* 2 * Static Memory Controller 3 */ 4 5 #include <linux/module.h> 6 #include <linux/kernel.h> 7 #include <linux/init.h> 8 #include <linux/io.h> 9 #include <linux/syscore_ops.h> 10 11 #include <mach/hardware.h> 12 #include <mach/smemc.h> 13 14 #ifdef CONFIG_PM 15 static unsigned long msc[2]; 16 static unsigned long sxcnfg, memclkcfg; 17 static unsigned long csadrcfg[4]; 18 19 static int pxa3xx_smemc_suspend(void) 20 { 21 msc[0] = __raw_readl(MSC0); 22 msc[1] = __raw_readl(MSC1); 23 sxcnfg = __raw_readl(SXCNFG); 24 memclkcfg = __raw_readl(MEMCLKCFG); 25 csadrcfg[0] = __raw_readl(CSADRCFG0); 26 csadrcfg[1] = __raw_readl(CSADRCFG1); 27 csadrcfg[2] = __raw_readl(CSADRCFG2); 28 csadrcfg[3] = __raw_readl(CSADRCFG3); 29 30 return 0; 31 } 32 33 static void pxa3xx_smemc_resume(void) 34 { 35 __raw_writel(msc[0], MSC0); 36 __raw_writel(msc[1], MSC1); 37 __raw_writel(sxcnfg, SXCNFG); 38 __raw_writel(memclkcfg, MEMCLKCFG); 39 __raw_writel(csadrcfg[0], CSADRCFG0); 40 __raw_writel(csadrcfg[1], CSADRCFG1); 41 __raw_writel(csadrcfg[2], CSADRCFG2); 42 __raw_writel(csadrcfg[3], CSADRCFG3); 43 } 44 45 static struct syscore_ops smemc_syscore_ops = { 46 .suspend = pxa3xx_smemc_suspend, 47 .resume = pxa3xx_smemc_resume, 48 }; 49 50 static int __init smemc_init(void) 51 { 52 if (cpu_is_pxa3xx()) 53 register_syscore_ops(&smemc_syscore_ops); 54 55 return 0; 56 } 57 subsys_initcall(smemc_init); 58 #endif 59