Add a sysdev for DBDMA PM.
Signed-off-by: Manuel Lauss <manuel.lauss@xxxxxxxxx>
---
Tested on DB1200 (STR while playing audio and SD card activity works fine).
Will probably throw rejects in power.c, hence the RFC.
arch/mips/alchemy/common/dbdma.c | 101 +++++++++++++++------
arch/mips/alchemy/common/power.c | 11 ---
arch/mips/include/asm/mach-au1x00/au1xxx_dbdma.h | 4 -
3 files changed, 72 insertions(+), 44 deletions(-)
diff --git a/arch/mips/alchemy/common/dbdma.c b/arch/mips/alchemy/common/dbdma.c
index 99ae84c..ca0506a 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;
diff --git a/arch/mips/alchemy/common/power.c b/arch/mips/alchemy/common/power.c
index cbc9eed..e5916a5 100644
--- a/arch/mips/alchemy/common/power.c
+++ b/arch/mips/alchemy/common/power.c
@@ -36,9 +36,6 @@
#include <asm/uaccess.h>
#include <asm/mach-au1x00/au1000.h>
-#if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200)
-#include <asm/mach-au1x00/au1xxx_dbdma.h>
-#endif
#ifdef CONFIG_PM
@@ -108,10 +105,6 @@ static void save_core_regs(void)
sleep_static_memctlr[3][0] = au_readl(MEM_STCFG3);
sleep_static_memctlr[3][1] = au_readl(MEM_STTIME3);
sleep_static_memctlr[3][2] = au_readl(MEM_STADDR3);
-
-#if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200)
- au1xxx_dbdma_suspend();
-#endif
}
static void restore_core_regs(void)
@@ -161,10 +154,6 @@ static void restore_core_regs(void)
au_writel(sleep_static_memctlr[3][0], MEM_STCFG3);
au_writel(sleep_static_memctlr[3][1], MEM_STTIME3);
au_writel(sleep_static_memctlr[3][2], MEM_STADDR3);
-
-#if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200)
- au1xxx_dbdma_resume();
-#endif
}
void au_sleep(void)
diff --git a/arch/mips/include/asm/mach-au1x00/au1xxx_dbdma.h b/arch/mips/include/asm/mach-au1x00/au1xxx_dbdma.h
index 8c6b110..c8a553a 100644
--- a/arch/mips/include/asm/mach-au1x00/au1xxx_dbdma.h
+++ b/arch/mips/include/asm/mach-au1x00/au1xxx_dbdma.h
@@ -358,10 +358,6 @@ u32 au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr);
u32 au1xxx_ddma_add_device(dbdev_tab_t *dev);
extern void au1xxx_ddma_del_device(u32 devid);
void *au1xxx_ddma_get_nextptr_virt(au1x_ddma_desc_t *dp);
-#ifdef CONFIG_PM
-void au1xxx_dbdma_suspend(void);
-void au1xxx_dbdma_resume(void);
-#endif
/*
* Flags for the put_source/put_dest functions.
--
1.7.0.4
