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rk29: vpu: add suspend/resume

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黄涛
2011-01-20 19:27:44 +08:00
parent 4807018478
commit 7337c8dc88
1 changed files with 55 additions and 43 deletions
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98
arch/arm/mach-rk29/vpu.c
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@@ -32,6 +32,7 @@
#include <linux/miscdevice.h>
#include <linux/mm.h>
#include <linux/poll.h>
#include <linux/platform_device.h>
#include <asm/uaccess.h>
@@ -107,19 +108,21 @@ static void vpu_power_on(void)
return;
pr_debug("power domain on\n");
pmu_set_power_domain(PD_VCODEC, true);
udelay(10);
udelay(10);
clk_enable(aclk_vepu);
clk_enable(hclk_vepu);
clk_enable(aclk_ddr_vepu);
clk_enable(hclk_cpu_vcodec);
udelay(10);
writel( (1<<27), RK29_CRU_BASE + CRU_SOFTRST0_CON );
writel( (1<<19), RK29_CRU_BASE + CRU_SOFTRST2_CON );
writel( (1<<18), RK29_CRU_BASE + CRU_SOFTRST2_CON );
writel( (1<<15), RK29_CRU_BASE + CRU_SOFTRST2_CON );
udelay(10);
writel( 0, RK29_CRU_BASE + CRU_SOFTRST0_CON );
writel( 0, RK29_CRU_BASE + CRU_SOFTRST2_CON );
udelay(10);
cru_set_soft_reset(SOFT_RST_CPU_VODEC_A2A_AHB, true);
cru_set_soft_reset(SOFT_RST_VCODEC_AHB_BUS, true);
cru_set_soft_reset(SOFT_RST_VCODEC_AXI_BUS, true);
cru_set_soft_reset(SOFT_RST_DDR_VCODEC_PORT, true);
udelay(10);
cru_set_soft_reset(SOFT_RST_CPU_VODEC_A2A_AHB, false);
cru_set_soft_reset(SOFT_RST_VCODEC_AHB_BUS, false);
cru_set_soft_reset(SOFT_RST_VCODEC_AXI_BUS, false);
cru_set_soft_reset(SOFT_RST_DDR_VCODEC_PORT, false);
client.enabled = true;
}
@@ -329,28 +332,6 @@ static irqreturn_t hx280enc_isr(int irq, void *dev_id)
return IRQ_HANDLED;
}
static void vpu_reset_dec_asic(struct vpu_device * dev)
{
unsigned int i, n = dev->iosize >> 2;
writel(0, dev->hwregs + DEC_INTERRUPT_REGISTER);
for (i = 1; i < n; i++) {
writel(0, dev->hwregs + i);
}
}
static void vpu_reset_enc_asic(struct vpu_device * dev)
{
unsigned int i, n = dev->iosize >> 2;
writel(0, dev->hwregs + 14);
for (i = 4; i < n; i++) {
writel(0, dev->hwregs + i);
}
}
static int vpu_mmap(struct file *fp, struct vm_area_struct *vm)
{
unsigned long pfn;
@@ -436,6 +417,39 @@ static struct miscdevice vpu_misc_device = {
.fops = &vpu_fops,
};
#ifdef CONFIG_PM
static int vpu_suspend(struct platform_device *pdev, pm_message_t state)
{
bool enabled = client.enabled;
vpu_power_off();
client.enabled = enabled;
return 0;
}
static int vpu_resume(struct platform_device *pdev)
{
if (client.enabled) {
client.enabled = false;
vpu_power_on();
}
return 0;
}
static struct platform_device vpu_pm_device = {
.name = "vpu",
.id = -1,
};
static struct platform_driver vpu_pm_driver = {
.driver = {
.name = "vpu",
.owner = THIS_MODULE,
},
.suspend = vpu_suspend,
.resume = vpu_resume,
};
#endif
static int __init vpu_init(void)
{
int ret;
@@ -463,9 +477,6 @@ static int __init vpu_init(void)
atomic_set(&client.dec_event, 0);
atomic_set(&client.enc_event, 0);
vpu_reset_dec_asic(&dec_dev); /* reset hardware */
vpu_reset_enc_asic(&enc_dev); /* reset hardware */
/* get the IRQ line */
ret = request_irq(IRQ_VDPU, hx170dec_isr, 0, "hx170dec", (void *)&dec_dev);
if (ret != 0) {
@@ -486,6 +497,11 @@ static int __init vpu_init(void)
}
vpu_power_off();
#ifdef CONFIG_PM
platform_device_register(&vpu_pm_device);
platform_driver_probe(&vpu_pm_driver, NULL);
#endif
pr_info("init success\n");
return 0;
@@ -505,17 +521,13 @@ err_reserve_io:
static void __exit vpu_exit(void)
{
#ifdef CONFIG_PM
platform_device_unregister(&vpu_pm_device);
platform_driver_unregister(&vpu_pm_driver);
#endif
vpu_power_on();
/* clear dec IRQ */
writel(0, dec_dev.hwregs + DEC_INTERRUPT_REGISTER);
/* clear pp IRQ */
writel(0, dec_dev.hwregs + PP_INTERRUPT_REGISTER);
writel(0, enc_dev.hwregs + 14); /* disable HW */
/* clear enc IRQ */
writel(0, enc_dev.hwregs + ENC_INTERRUPT_REGISTER);
misc_deregister(&vpu_misc_device);
free_irq(IRQ_VEPU, (void *)&enc_dev);
free_irq(IRQ_VDPU, (void *)&dec_dev);