diff options
Diffstat (limited to 'arch/mips/alchemy/common/dbdma.c')
| -rw-r--r-- | arch/mips/alchemy/common/dbdma.c | 101 |
1 files changed, 72 insertions, 29 deletions
diff --git a/arch/mips/alchemy/common/dbdma.c b/arch/mips/alchemy/common/dbdma.c index 99ae84ce5af3..ca0506a8585a 100644 --- a/arch/mips/alchemy/common/dbdma.c +++ b/arch/mips/alchemy/common/dbdma.c @@ -36,6 +36,7 @@ #include <linux/spinlock.h> #include <linux/interrupt.h> #include <linux/module.h> +#include <linux/sysdev.h> #include <asm/mach-au1x00/au1000.h> #include <asm/mach-au1x00/au1xxx_dbdma.h> @@ -174,10 +175,6 @@ 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][6]; -#endif - static chan_tab_t *chan_tab_ptr[NUM_DBDMA_CHANS]; @@ -960,29 +957,37 @@ u32 au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr) return nbytes; } -#ifdef CONFIG_PM -void au1xxx_dbdma_suspend(void) + +struct alchemy_dbdma_sysdev { + struct sys_device sysdev; + u32 pm_regs[NUM_DBDMA_CHANS + 1][6]; +}; + +static int alchemy_dbdma_suspend(struct sys_device *dev, + pm_message_t state) { + struct alchemy_dbdma_sysdev *sdev = + container_of(dev, struct alchemy_dbdma_sysdev, sysdev); 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); + sdev->pm_regs[0][0] = au_readl(addr + 0x00); + sdev->pm_regs[0][1] = au_readl(addr + 0x04); + sdev->pm_regs[0][2] = au_readl(addr + 0x08); + sdev->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); + sdev->pm_regs[i][0] = au_readl(addr + 0x00); + sdev->pm_regs[i][1] = au_readl(addr + 0x04); + sdev->pm_regs[i][2] = au_readl(addr + 0x08); + sdev->pm_regs[i][3] = au_readl(addr + 0x0c); + sdev->pm_regs[i][4] = au_readl(addr + 0x10); + sdev->pm_regs[i][5] = au_readl(addr + 0x14); /* halt channel */ - au_writel(au1xxx_dbdma_pm_regs[i][0] & ~1, addr + 0x00); + au_writel(sdev->pm_regs[i][0] & ~1, addr + 0x00); au_sync(); while (!(au_readl(addr + 0x14) & 1)) au_sync(); @@ -992,32 +997,65 @@ void au1xxx_dbdma_suspend(void) /* disable channel interrupts */ au_writel(0, DDMA_GLOBAL_BASE + 0x0c); au_sync(); + + return 0; } -void au1xxx_dbdma_resume(void) +static int alchemy_dbdma_resume(struct sys_device *dev) { + struct alchemy_dbdma_sysdev *sdev = + container_of(dev, struct alchemy_dbdma_sysdev, sysdev); 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); + au_writel(sdev->pm_regs[0][0], addr + 0x00); + au_writel(sdev->pm_regs[0][1], addr + 0x04); + au_writel(sdev->pm_regs[0][2], addr + 0x08); + au_writel(sdev->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(sdev->pm_regs[i][0], addr + 0x00); + au_writel(sdev->pm_regs[i][1], addr + 0x04); + au_writel(sdev->pm_regs[i][2], addr + 0x08); + au_writel(sdev->pm_regs[i][3], addr + 0x0c); + au_writel(sdev->pm_regs[i][4], addr + 0x10); + au_writel(sdev->pm_regs[i][5], addr + 0x14); au_sync(); addr += 0x100; /* next channel base */ } + + return 0; +} + +static struct sysdev_class alchemy_dbdma_sysdev_class = { + .name = "dbdma", + .suspend = alchemy_dbdma_suspend, + .resume = alchemy_dbdma_resume, +}; + +static int __init alchemy_dbdma_sysdev_init(void) +{ + struct alchemy_dbdma_sysdev *sdev; + int ret; + + ret = sysdev_class_register(&alchemy_dbdma_sysdev_class); + if (ret) + return ret; + + sdev = kzalloc(sizeof(struct alchemy_dbdma_sysdev), GFP_KERNEL); + if (!sdev) + return -ENOMEM; + + sdev->sysdev.id = -1; + sdev->sysdev.cls = &alchemy_dbdma_sysdev_class; + ret = sysdev_register(&sdev->sysdev); + if (ret) + kfree(sdev); + + return ret; } -#endif /* CONFIG_PM */ static int __init au1xxx_dbdma_init(void) { @@ -1046,6 +1084,11 @@ static int __init au1xxx_dbdma_init(void) else { dbdma_initialized = 1; printk(KERN_INFO "Alchemy DBDMA initialized\n"); + ret = alchemy_dbdma_sysdev_init(); + if (ret) { + printk(KERN_ERR "DBDMA PM init failed\n"); + ret = 0; + } } return ret; |