Skip to content

S
Simple PCIe FMC carrier SPEC
Commit 1a72bcbc authored by Federico Vaga's avatar Federico Vaga
Browse files
Options

sw:drv: add reset sysfs attributes 

We expose only the application reset because it is the useful one.
Resetting the full design is something that the user can't (should not)
do while the driver is running.
Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent 0eb3b26a
Hide whitespace changes
Inline Side-by-side
Showing with 40 additions and 0 deletions
software/kernel/spec-core-fpga.c
View file @ 1a72bcbc
......@@ -466,9 +466,49 @@ static ssize_t application_offset_show(struct device *dev,
}
static DEVICE_ATTR_RO(application_offset);
enum spec_fpga_csr_resets {
SPEC_FPGA_CSR_RESETS_ALL = BIT(0),
SPEC_FPGA_CSR_RESETS_APP = BIT(1),
};
static ssize_t reset_app_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct spec_fpga *spec_fpga = to_spec_fpga(dev);
uint32_t resets;
resets = ioread32(spec_fpga->fpga + SPEC_FPGA_CSR_RESETS);
return snprintf(buf, PAGE_SIZE, "%d\n",
!!(resets & SPEC_FPGA_CSR_RESETS_APP));
}
static ssize_t reset_app_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct spec_fpga *spec_fpga = to_spec_fpga(dev);
uint32_t resets;
long val;
int err;
err =kstrtol(buf, 10, &val);
if (err)
return err;
resets = ioread32(spec_fpga->fpga + SPEC_FPGA_CSR_RESETS);
if (val)
resets |= SPEC_FPGA_CSR_RESETS_APP;
else
resets &= ~SPEC_FPGA_CSR_RESETS_APP;
iowrite32(resets, spec_fpga->fpga + SPEC_FPGA_CSR_RESETS);
return count;
}
static DEVICE_ATTR(reset_app, 0644, reset_app_show, reset_app_store);
static struct attribute *spec_fpga_csr_attrs[] = {
&dev_attr_pcb_rev.attr,
&dev_attr_application_offset.attr,
&dev_attr_reset_app.attr,
NULL,
};
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment