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bcwc_pcie: power down hardware

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This commit is contained in:
Sven Schnelle
2015-10-29 23:13:29 +01:00
parent bd4650a2f7
commit 07686d56a1
3 changed files with 41 additions and 0 deletions
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1
bcwc_drv.c
View File

@@ -309,6 +309,7 @@ static void bcwc_pci_remove(struct pci_dev *pdev)
dev_priv = pci_get_drvdata(pdev);
bcwc_isp_cmd_stop(dev_priv);
isp_uninit(dev_priv);
bcwc_hw_deinit(dev_priv);
if (dev_priv) {
isp_mem_destroy(dev_priv->firmware);

38
bcwc_isp.c
View File

@@ -258,8 +258,46 @@ out:
return -ENOMEM;
}
static void bcwc_isp_powerdown(struct bcwc_private *dev_priv)
{
struct isp_mem_obj *request;
struct isp_cmd_hdr *cmd;
dev_info(&dev_priv->pdev->dev, "%s\n", __FUNCTION__);
request = isp_mem_create(dev_priv, FTHD_MEM_CMD, sizeof(cmd));
if (!request) {
dev_err(&dev_priv->pdev->dev, "failed to allocate cmd memory object\n");
return;
}
dev_info(&dev_priv->pdev->dev, "allocated request cmd buffer at offset %08lx\n", request->offset);
cmd = dev_priv->s2_mem + request->offset;
memset(cmd, 0, sizeof(*cmd));
cmd->opcode = CISP_CMD_POWER_DOWN;
bcwc_channel_ringbuf_send(dev_priv, dev_priv->channel_io, request->offset, 8, 8);
mdelay(100);
bcwc_channel_ringbuf_dump(dev_priv, dev_priv->channel_io);
}
int isp_uninit(struct bcwc_private *dev_priv)
{
int retries;
u32 reg;
BCWC_ISP_REG_WRITE(0xf7fbdff9, 0xc3000);
bcwc_isp_powerdown(dev_priv);
for (retries = 0; retries < 1000; retries++) {
reg = BCWC_ISP_REG_READ(0xc3000);
if (reg == 0x8042006)
break;
mdelay(10);
}
if (retries >= 1000) {
dev_info(&dev_priv->pdev->dev, "Deinit failed!\n");
}
BCWC_ISP_REG_WRITE(0xffffffff, 0xc0008);
BCWC_ISP_REG_WRITE(0xffffffff, 0xc000c);
BCWC_ISP_REG_WRITE(0xffffffff, 0xc0010);

2
bcwc_isp.h
View File

@@ -35,6 +35,7 @@ enum bcwc_isp_cmds {
CISP_CMD_START=0,
CISP_CMD_STOP=1,
CISP_CMD_PRINT_ENABLE=4,
CISP_CMD_POWER_DOWN=10,
};
struct isp_mem_obj {
@@ -72,6 +73,7 @@ struct isp_cmd_print_enable {
#define to_isp_mem_obj(x) container_of((x), struct isp_mem_obj, base)
extern int isp_init(struct bcwc_private *dev_priv);
extern int isp_uninit(struct bcwc_private *dev_priv);
extern int isp_mem_init(struct bcwc_private *dev_priv);
extern struct isp_mem_obj *isp_mem_create(struct bcwc_private *dev_priv,