mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Umang Raghuvanshi](/assets/img/avatar_default.png)
Fix the following formatting issues: CHECK: Alignment should match open parenthesis Signed-off-by: Umang Raghuvanshi <u@umangis.me> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
238 lines
6.5 KiB
C
238 lines
6.5 KiB
C
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include "fbtft.h"
|
|
|
|
#define DRVNAME "fb_ssd1351"
|
|
#define WIDTH 128
|
|
#define HEIGHT 128
|
|
#define GAMMA_NUM 1
|
|
#define GAMMA_LEN 63
|
|
#define DEFAULT_GAMMA "0 2 2 2 2 2 2 2 " \
|
|
"2 2 2 2 2 2 2 2 " \
|
|
"2 2 2 2 2 2 2 2 " \
|
|
"2 2 2 2 2 2 2 2 " \
|
|
"2 2 2 2 2 2 2 2 " \
|
|
"2 2 2 2 2 2 2 2 " \
|
|
"2 2 2 2 2 2 2 2 " \
|
|
"2 2 2 2 2 2 2" \
|
|
|
|
static void register_onboard_backlight(struct fbtft_par *par);
|
|
|
|
static int init_display(struct fbtft_par *par)
|
|
{
|
|
if (par->pdata &&
|
|
par->pdata->display.backlight == FBTFT_ONBOARD_BACKLIGHT) {
|
|
/* module uses onboard GPIO for panel power */
|
|
par->fbtftops.register_backlight = register_onboard_backlight;
|
|
}
|
|
|
|
par->fbtftops.reset(par);
|
|
|
|
write_reg(par, 0xfd, 0x12); /* Command Lock */
|
|
write_reg(par, 0xfd, 0xb1); /* Command Lock */
|
|
write_reg(par, 0xae); /* Display Off */
|
|
write_reg(par, 0xb3, 0xf1); /* Front Clock Div */
|
|
write_reg(par, 0xca, 0x7f); /* Set Mux Ratio */
|
|
write_reg(par, 0x15, 0x00, 0x7f); /* Set Column Address */
|
|
write_reg(par, 0x75, 0x00, 0x7f); /* Set Row Address */
|
|
write_reg(par, 0xa1, 0x00); /* Set Display Start Line */
|
|
write_reg(par, 0xa2, 0x00); /* Set Display Offset */
|
|
write_reg(par, 0xb5, 0x00); /* Set GPIO */
|
|
write_reg(par, 0xab, 0x01); /* Set Function Selection */
|
|
write_reg(par, 0xb1, 0x32); /* Set Phase Length */
|
|
write_reg(par, 0xb4, 0xa0, 0xb5, 0x55); /* Set Segment Low Voltage */
|
|
write_reg(par, 0xbb, 0x17); /* Set Precharge Voltage */
|
|
write_reg(par, 0xbe, 0x05); /* Set VComH Voltage */
|
|
write_reg(par, 0xc1, 0xc8, 0x80, 0xc8); /* Set Contrast */
|
|
write_reg(par, 0xc7, 0x0f); /* Set Master Contrast */
|
|
write_reg(par, 0xb6, 0x01); /* Set Second Precharge Period */
|
|
write_reg(par, 0xa6); /* Set Display Mode Reset */
|
|
write_reg(par, 0xaf); /* Set Sleep Mode Display On */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
|
|
{
|
|
write_reg(par, 0x15, xs, xe);
|
|
write_reg(par, 0x75, ys, ye);
|
|
write_reg(par, 0x5c);
|
|
}
|
|
|
|
static int set_var(struct fbtft_par *par)
|
|
{
|
|
unsigned int remap;
|
|
|
|
if (par->fbtftops.init_display != init_display) {
|
|
/* don't risk messing up register A0h */
|
|
fbtft_par_dbg(DEBUG_INIT_DISPLAY, par,
|
|
"%s: skipping since custom init_display() is used\n",
|
|
__func__);
|
|
return 0;
|
|
}
|
|
|
|
remap = 0x60 | (par->bgr << 2); /* Set Colour Depth */
|
|
|
|
switch (par->info->var.rotate) {
|
|
case 0:
|
|
write_reg(par, 0xA0, remap | 0x00 | 1 << 4);
|
|
break;
|
|
case 270:
|
|
write_reg(par, 0xA0, remap | 0x03 | 1 << 4);
|
|
break;
|
|
case 180:
|
|
write_reg(par, 0xA0, remap | 0x02);
|
|
break;
|
|
case 90:
|
|
write_reg(par, 0xA0, remap | 0x01);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Grayscale Lookup Table
|
|
* GS1 - GS63
|
|
* The driver Gamma curve contains the relative values between the entries
|
|
* in the Lookup table.
|
|
*
|
|
* From datasheet:
|
|
* 8.8 Gray Scale Decoder
|
|
*
|
|
* there are total 180 Gamma Settings (Setting 0 to Setting 180)
|
|
* available for the Gray Scale table.
|
|
*
|
|
* The gray scale is defined in incremental way, with reference
|
|
* to the length of previous table entry:
|
|
* Setting of GS1 has to be >= 0
|
|
* Setting of GS2 has to be > Setting of GS1 +1
|
|
* Setting of GS3 has to be > Setting of GS2 +1
|
|
* :
|
|
* Setting of GS63 has to be > Setting of GS62 +1
|
|
*
|
|
*/
|
|
static int set_gamma(struct fbtft_par *par, u32 *curves)
|
|
{
|
|
unsigned long tmp[GAMMA_NUM * GAMMA_LEN];
|
|
int i, acc = 0;
|
|
|
|
for (i = 0; i < 63; i++) {
|
|
if (i > 0 && curves[i] < 2) {
|
|
dev_err(par->info->device,
|
|
"Illegal value in Grayscale Lookup Table at index %d. " \
|
|
"Must be greater than 1\n", i);
|
|
return -EINVAL;
|
|
}
|
|
acc += curves[i];
|
|
tmp[i] = acc;
|
|
if (acc > 180) {
|
|
dev_err(par->info->device,
|
|
"Illegal value(s) in Grayscale Lookup Table. " \
|
|
"At index=%d, the accumulated value has exceeded 180\n", i);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
write_reg(par, 0xB8,
|
|
tmp[0], tmp[1], tmp[2], tmp[3], tmp[4], tmp[5], tmp[6], tmp[7],
|
|
tmp[8], tmp[9], tmp[10], tmp[11], tmp[12], tmp[13], tmp[14], tmp[15],
|
|
tmp[16], tmp[17], tmp[18], tmp[19], tmp[20], tmp[21], tmp[22], tmp[23],
|
|
tmp[24], tmp[25], tmp[26], tmp[27], tmp[28], tmp[29], tmp[30], tmp[31],
|
|
tmp[32], tmp[33], tmp[34], tmp[35], tmp[36], tmp[37], tmp[38], tmp[39],
|
|
tmp[40], tmp[41], tmp[42], tmp[43], tmp[44], tmp[45], tmp[46], tmp[47],
|
|
tmp[48], tmp[49], tmp[50], tmp[51], tmp[52], tmp[53], tmp[54], tmp[55],
|
|
tmp[56], tmp[57], tmp[58], tmp[59], tmp[60], tmp[61], tmp[62]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int blank(struct fbtft_par *par, bool on)
|
|
{
|
|
fbtft_par_dbg(DEBUG_BLANK, par, "%s(blank=%s)\n",
|
|
__func__, on ? "true" : "false");
|
|
if (on)
|
|
write_reg(par, 0xAE);
|
|
else
|
|
write_reg(par, 0xAF);
|
|
return 0;
|
|
}
|
|
|
|
static struct fbtft_display display = {
|
|
.regwidth = 8,
|
|
.width = WIDTH,
|
|
.height = HEIGHT,
|
|
.gamma_num = GAMMA_NUM,
|
|
.gamma_len = GAMMA_LEN,
|
|
.gamma = DEFAULT_GAMMA,
|
|
.fbtftops = {
|
|
.init_display = init_display,
|
|
.set_addr_win = set_addr_win,
|
|
.set_var = set_var,
|
|
.set_gamma = set_gamma,
|
|
.blank = blank,
|
|
},
|
|
};
|
|
|
|
#ifdef CONFIG_FB_BACKLIGHT
|
|
static int update_onboard_backlight(struct backlight_device *bd)
|
|
{
|
|
struct fbtft_par *par = bl_get_data(bd);
|
|
bool on;
|
|
|
|
fbtft_par_dbg(DEBUG_BACKLIGHT, par,
|
|
"%s: power=%d, fb_blank=%d\n",
|
|
__func__, bd->props.power, bd->props.fb_blank);
|
|
|
|
on = (bd->props.power == FB_BLANK_UNBLANK) &&
|
|
(bd->props.fb_blank == FB_BLANK_UNBLANK);
|
|
/* Onboard backlight connected to GPIO0 on SSD1351, GPIO1 unused */
|
|
write_reg(par, 0xB5, on ? 0x03 : 0x02);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct backlight_ops bl_ops = {
|
|
.update_status = update_onboard_backlight,
|
|
};
|
|
|
|
static void register_onboard_backlight(struct fbtft_par *par)
|
|
{
|
|
struct backlight_device *bd;
|
|
struct backlight_properties bl_props = { 0, };
|
|
|
|
bl_props.type = BACKLIGHT_RAW;
|
|
bl_props.power = FB_BLANK_POWERDOWN;
|
|
|
|
bd = backlight_device_register(dev_driver_string(par->info->device),
|
|
par->info->device, par, &bl_ops, &bl_props);
|
|
if (IS_ERR(bd)) {
|
|
dev_err(par->info->device,
|
|
"cannot register backlight device (%ld)\n",
|
|
PTR_ERR(bd));
|
|
return;
|
|
}
|
|
par->info->bl_dev = bd;
|
|
|
|
if (!par->fbtftops.unregister_backlight)
|
|
par->fbtftops.unregister_backlight = fbtft_unregister_backlight;
|
|
}
|
|
#else
|
|
static void register_onboard_backlight(struct fbtft_par *par) { };
|
|
#endif
|
|
|
|
FBTFT_REGISTER_DRIVER(DRVNAME, "solomon,ssd1351", &display);
|
|
|
|
MODULE_ALIAS("spi:" DRVNAME);
|
|
MODULE_ALIAS("platform:" DRVNAME);
|
|
MODULE_ALIAS("spi:ssd1351");
|
|
MODULE_ALIAS("platform:ssd1351");
|
|
|
|
MODULE_DESCRIPTION("SSD1351 OLED Driver");
|
|
MODULE_AUTHOR("James Davies");
|
|
MODULE_LICENSE("GPL");
|