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MIPS: Alchemy: add sysdev for DBDMA PM.
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Add a sysdev for DBDMA PM.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
To: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/1119/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Manuel Lauss authored and Ralf Baechle committed May 21, 2010
1 parent 0f0d85b commit 96d660c
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Showing 3 changed files with 72 additions and 44 deletions.
101 changes: 72 additions & 29 deletions arch/mips/alchemy/common/dbdma.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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>

Expand Down Expand Up @@ -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];

Expand Down Expand Up @@ -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();
Expand All @@ -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)
{
Expand Down Expand Up @@ -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;
Expand Down
11 changes: 0 additions & 11 deletions arch/mips/alchemy/common/power.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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

Expand Down Expand Up @@ -129,10 +126,6 @@ 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)
Expand Down Expand Up @@ -196,10 +189,6 @@ static void restore_core_regs(void)
au_writel(sleep_uart0_linectl, UART0_ADDR + UART_LCR); au_sync();
au_writel(sleep_uart0_clkdiv, UART0_ADDR + UART_CLK); au_sync();
}

#if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200)
au1xxx_dbdma_resume();
#endif
}

void au_sleep(void)
Expand Down
4 changes: 0 additions & 4 deletions arch/mips/include/asm/mach-au1x00/au1xxx_dbdma.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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.
Expand Down

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