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tegra_cec: suppport dump registers and snoop mode

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Provide dump registers and changingRX snoop mode interface.

Bug 200382184

Change-Id: Idb55d22112bc6be9de89b8ff8e060e73de469507
Signed-off-by: Chun Xu <chunx@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1765068
(cherry picked from commit 3310df0f117d792d3d0bfab6326592851faaeed7)
Reviewed-on: https://git-master.nvidia.com/r/1641846
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Prafull Suryawanshi <prafulls@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Chun Xu
2018-01-19 11:08:51 +08:00
committed by Prafull Suryawanshi
parent 23461a3851
commit cf3a533906
2 changed files with 65 additions and 0 deletions
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61
drivers/misc/tegra-cec/tegra_cec.c
View File

@@ -325,9 +325,49 @@ out:
return IRQ_HANDLED;
}
static int tegra_cec_dump_registers(struct tegra_cec *cec)
{
int value, i;
dev_info(cec->dev, "base address = %llx\n", (u64)cec->cec_base);
for(i = 0; i <= TEGRA_CEC_HW_SPARE; i+=4)
{
value = readl(cec->cec_base + i);
dev_info(cec->dev, "offset %08x: %08x\n", i, value);
}
return i;
}
static int tegra_cec_set_rx_snoop(struct tegra_cec *cec, u32 enable)
{
u32 state;
if (!atomic_read(&cec->init_done))
return -EAGAIN;
state = readl(cec->cec_base + TEGRA_CEC_HW_CONTROL);
if (((state & TEGRA_CEC_HWCTRL_RX_SNOOP) != 0) ^ (enable != 0)) {
state ^= TEGRA_CEC_HWCTRL_RX_SNOOP;
writel(state, cec->cec_base + TEGRA_CEC_HW_CONTROL);
}
return 0;
}
static int tegra_cec_get_rx_snoop(struct tegra_cec *cec, u32 *state)
{
if (!atomic_read(&cec->init_done))
return -EAGAIN;
*state = (readl(cec->cec_base + TEGRA_CEC_HW_CONTROL) & TEGRA_CEC_HWCTRL_RX_SNOOP) >> 15;
return 0;
}
static long tegra_cec_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
int err;
u32 state;
struct tegra_cec *cec = file->private_data;
if (_IOC_TYPE(cmd) != TEGRA_CEC_IOC_MAGIC)
@@ -339,6 +379,27 @@ static long tegra_cec_ioctl(struct file *file, unsigned int cmd,
tegra_cec_error_recovery(cec);
mutex_unlock(&cec->recovery_lock);
break;
case TEGRA_CEC_IOCTL_DUMP_REGISTERS:
tegra_cec_dump_registers(cec);
break;
case TEGRA_CEC_IOCTL_SET_RX_SNOOP:
err = !access_ok(VERIFY_READ, arg, sizeof(u32));
if (err)
return -EFAULT;
if (copy_from_user((u32 *) &state, (u32 *) arg, sizeof(u32)))
return -EFAULT;
tegra_cec_set_rx_snoop(cec, state);
break;
case TEGRA_CEC_IOCTL_GET_RX_SNOOP:
err = !access_ok(VERIFY_WRITE, arg, sizeof(u32));
if (err)
return -EFAULT;
err = tegra_cec_get_rx_snoop(cec, &state);
if (!err) {
if (copy_to_user((u32 *) arg, &state, sizeof(u32)))
return -EFAULT;
}
break;
default:
dev_err(cec->dev, "unsupported ioctl\n");
return -EINVAL;

4
drivers/misc/tegra-cec/tegra_cec.h
View File

@@ -77,6 +77,7 @@ static int tegra_cec_remove(struct platform_device *pdev);
#define TEGRA_CEC_INT_MASK 0X034
#define TEGRA_CEC_HW_DEBUG_RX 0X038
#define TEGRA_CEC_HW_DEBUG_TX 0X03C
#define TEGRA_CEC_HW_SPARE 0X03C
#define TEGRA_CEC_MAX_LOGICAL_ADDR 15
#define TEGRA_CEC_HWCTRL_RX_LADDR_UNREG 0x0
@@ -167,5 +168,8 @@ static int tegra_cec_remove(struct platform_device *pdev);
#define TEGRA_CEC_IOC_MAGIC 'C'
#define TEGRA_CEC_IOCTL_ERROR_RECOVERY _IO(TEGRA_CEC_IOC_MAGIC, 1)
#define TEGRA_CEC_IOCTL_DUMP_REGISTERS _IO(TEGRA_CEC_IOC_MAGIC, 2)
#define TEGRA_CEC_IOCTL_SET_RX_SNOOP _IO(TEGRA_CEC_IOC_MAGIC, 3)
#define TEGRA_CEC_IOCTL_GET_RX_SNOOP _IO(TEGRA_CEC_IOC_MAGIC, 4)
#endif /* TEGRA_CEC_H */