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Diffstat (limited to 'arch/mips/alchemy/common/dbdma.c')
-rw-r--r--arch/mips/alchemy/common/dbdma.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/mips/alchemy/common/dbdma.c b/arch/mips/alchemy/common/dbdma.c
index 601ee9180ee4..3ab6d80d150d 100644
--- a/arch/mips/alchemy/common/dbdma.c
+++ b/arch/mips/alchemy/common/dbdma.c
@@ -174,6 +174,11 @@ static dbdev_tab_t dbdev_tab[] = {
#define DBDEV_TAB_SIZE ARRAY_SIZE(dbdev_tab)
+#ifdef CONFIG_PM
+static u32 au1xxx_dbdma_pm_regs[NUM_DBDMA_CHANS + 1][8];
+#endif
+
+
static chan_tab_t *chan_tab_ptr[NUM_DBDMA_CHANS];
static dbdev_tab_t *find_dbdev_id(u32 id)
@@ -975,4 +980,64 @@ u32 au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr)
return nbytes;
}
+#ifdef CONFIG_PM
+void au1xxx_dbdma_suspend(void)
+{
+ int i;
+ u32 addr;
+
+ addr = DDMA_GLOBAL_BASE;
+ au1xxx_dbdma_pm_regs[0][0] = au_readl(addr + 0x00);
+ au1xxx_dbdma_pm_regs[0][1] = au_readl(addr + 0x04);
+ au1xxx_dbdma_pm_regs[0][2] = au_readl(addr + 0x08);
+ au1xxx_dbdma_pm_regs[0][3] = au_readl(addr + 0x0c);
+
+ /* save channel configurations */
+ for (i = 1, addr = DDMA_CHANNEL_BASE; i < NUM_DBDMA_CHANS; i++) {
+ au1xxx_dbdma_pm_regs[i][0] = au_readl(addr + 0x00);
+ au1xxx_dbdma_pm_regs[i][1] = au_readl(addr + 0x04);
+ au1xxx_dbdma_pm_regs[i][2] = au_readl(addr + 0x08);
+ au1xxx_dbdma_pm_regs[i][3] = au_readl(addr + 0x0c);
+ au1xxx_dbdma_pm_regs[i][4] = au_readl(addr + 0x10);
+ au1xxx_dbdma_pm_regs[i][5] = au_readl(addr + 0x14);
+ au1xxx_dbdma_pm_regs[i][6] = au_readl(addr + 0x18);
+
+ /* halt channel */
+ au_writel(au1xxx_dbdma_pm_regs[i][0] & ~1, addr + 0x00);
+ au_sync();
+ while (!(au_readl(addr + 0x14) & 1))
+ au_sync();
+
+ addr += 0x100; /* next channel base */
+ }
+ /* disable channel interrupts */
+ au_writel(0, DDMA_GLOBAL_BASE + 0x0c);
+ au_sync();
+}
+
+void au1xxx_dbdma_resume(void)
+{
+ int i;
+ u32 addr;
+
+ addr = DDMA_GLOBAL_BASE;
+ au_writel(au1xxx_dbdma_pm_regs[0][0], addr + 0x00);
+ au_writel(au1xxx_dbdma_pm_regs[0][1], addr + 0x04);
+ au_writel(au1xxx_dbdma_pm_regs[0][2], addr + 0x08);
+ au_writel(au1xxx_dbdma_pm_regs[0][3], addr + 0x0c);
+
+ /* restore channel configurations */
+ for (i = 1, addr = DDMA_CHANNEL_BASE; i < NUM_DBDMA_CHANS; i++) {
+ au_writel(au1xxx_dbdma_pm_regs[i][0], addr + 0x00);
+ au_writel(au1xxx_dbdma_pm_regs[i][1], addr + 0x04);
+ au_writel(au1xxx_dbdma_pm_regs[i][2], addr + 0x08);
+ au_writel(au1xxx_dbdma_pm_regs[i][3], addr + 0x0c);
+ au_writel(au1xxx_dbdma_pm_regs[i][4], addr + 0x10);
+ au_writel(au1xxx_dbdma_pm_regs[i][5], addr + 0x14);
+ au_writel(au1xxx_dbdma_pm_regs[i][6], addr + 0x18);
+ au_sync();
+ addr += 0x100; /* next channel base */
+ }
+}
+#endif /* CONFIG_PM */
#endif /* defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200) */