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// SPDX-License-Identifier: GPL-2.0
#include "fbtft.h"
#include "internal.h"
static int get_next_ulong(char **str_p, unsigned long *val, char *sep, int base)
{
char *p_val;
if (!str_p || !(*str_p))
return -EINVAL;
p_val = strsep(str_p, sep);
if (!p_val)
return -EINVAL;
return kstrtoul(p_val, base, val);
}
int fbtft_gamma_parse_str(struct fbtft_par *par, u32 *curves,
const char *str, int size)
{
char *str_p, *curve_p = NULL;
char *tmp;
unsigned long val = 0;
int ret = 0;
int curve_counter, value_counter;
fbtft_par_dbg(DEBUG_SYSFS, par, "%s() str=\n", __func__);
if (!str || !curves)
return -EINVAL;
fbtft_par_dbg(DEBUG_SYSFS, par, "%s\n", str);
tmp = kmemdup(str, size + 1, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
/* replace optional separators */
str_p = tmp;
while (*str_p) {
if (*str_p == ',')
*str_p = ' ';
if (*str_p == ';')
*str_p = '\n';
str_p++;
}
str_p = strim(tmp);
curve_counter = 0;
while (str_p) {
if (curve_counter == par->gamma.num_curves) {
dev_err(par->info->device, "Gamma: Too many curves\n");
ret = -EINVAL;
goto out;
}
curve_p = strsep(&str_p, "\n");
value_counter = 0;
while (curve_p) {
if (value_counter == par->gamma.num_values) {
dev_err(par->info->device,
"Gamma: Too many values\n");
ret = -EINVAL;
goto out;
}
ret = get_next_ulong(&curve_p, &val, " ", 16);
if (ret)
goto out;
curves[curve_counter * par->gamma.num_values + value_counter] = val;
value_counter++;
}
if (value_counter != par->gamma.num_values) {
dev_err(par->info->device, "Gamma: Too few values\n");
ret = -EINVAL;
goto out;
}
curve_counter++;
}
if (curve_counter != par->gamma.num_curves) {
dev_err(par->info->device, "Gamma: Too few curves\n");
ret = -EINVAL;
goto out;
}
out:
kfree(tmp);
return ret;
}
static ssize_t
sprintf_gamma(struct fbtft_par *par, u32 *curves, char *buf)
{
ssize_t len = 0;
unsigned int i, j;
mutex_lock(&par->gamma.lock);
for (i = 0; i < par->gamma.num_curves; i++) {
for (j = 0; j < par->gamma.num_values; j++)
len += scnprintf(&buf[len], PAGE_SIZE,
"%04x ", curves[i * par->gamma.num_values + j]);
buf[len - 1] = '\n';
}
mutex_unlock(&par->gamma.lock);
return len;
}
static ssize_t store_gamma_curve(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct fb_info *fb_info = dev_get_drvdata(device);
struct fbtft_par *par = fb_info->par;
u32 tmp_curves[FBTFT_GAMMA_MAX_VALUES_TOTAL];
int ret;
ret = fbtft_gamma_parse_str(par, tmp_curves, buf, count);
if (ret)
return ret;
ret = par->fbtftops.set_gamma(par, tmp_curves);
if (ret)
return ret;
mutex_lock(&par->gamma.lock);
memcpy(par->gamma.curves, tmp_curves,
par->gamma.num_curves * par->gamma.num_values *
sizeof(tmp_curves[0]));
mutex_unlock(&par->gamma.lock);
return count;
}
static ssize_t show_gamma_curve(struct device *device,
struct device_attribute *attr, char *buf)
{
struct fb_info *fb_info = dev_get_drvdata(device);
struct fbtft_par *par = fb_info->par;
return sprintf_gamma(par, par->gamma.curves, buf);
}
static struct device_attribute gamma_device_attrs[] = {
__ATTR(gamma, 0660, show_gamma_curve, store_gamma_curve),
};
void fbtft_expand_debug_value(unsigned long *debug)
{
switch (*debug & 0x7) {
case 1:
*debug |= DEBUG_LEVEL_1;
break;
case 2:
*debug |= DEBUG_LEVEL_2;
break;
case 3:
*debug |= DEBUG_LEVEL_3;
break;
case 4:
*debug |= DEBUG_LEVEL_4;
break;
case 5:
*debug |= DEBUG_LEVEL_5;
break;
case 6:
*debug |= DEBUG_LEVEL_6;
break;
case 7:
*debug = 0xFFFFFFFF;
break;
}
}
static ssize_t store_debug(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct fb_info *fb_info = dev_get_drvdata(device);
struct fbtft_par *par = fb_info->par;
int ret;
ret = kstrtoul(buf, 10, &par->debug);
if (ret)
return ret;
fbtft_expand_debug_value(&par->debug);
return count;
}
static ssize_t show_debug(struct device *device,
struct device_attribute *attr, char *buf)
{
struct fb_info *fb_info = dev_get_drvdata(device);
struct fbtft_par *par = fb_info->par;
return snprintf(buf, PAGE_SIZE, "%lu\n", par->debug);
}
static struct device_attribute debug_device_attr =
__ATTR(debug, 0660, show_debug, store_debug);
void fbtft_sysfs_init(struct fbtft_par *par)
{
device_create_file(par->info->dev, &debug_device_attr);
if (par->gamma.curves && par->fbtftops.set_gamma)
device_create_file(par->info->dev, &gamma_device_attrs[0]);
}
void fbtft_sysfs_exit(struct fbtft_par *par)
{
device_remove_file(par->info->dev, &debug_device_attr);
if (par->gamma.curves && par->fbtftops.set_gamma)
device_remove_file(par->info->dev, &gamma_device_attrs[0]);
}
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