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/*
******************************************************************************
* @file seeed5inch.c
* @author StarFive Technology
* @version V1.0
* @date 01/07/2021
* @brief
******************************************************************************
* @copy
*
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STARFIVE SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>© COPYRIGHT 2021 Shanghai StarFive Technology Co., Ltd. </center></h2>
*/
#include <linux/clk.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/media.h>
#include <linux/module.h>
#include <linux/ratelimit.h>
#include <linux/slab.h>
#include <linux/string.h>
/* I2C registers of the Atmel microcontroller. */
enum REG_ADDR {
REG_ID = 0x80,
REG_PORTA, /* BIT(2) for horizontal flip, BIT(3) for vertical flip */
REG_PORTB,
REG_PORTC,
REG_PORTD,
REG_POWERON,
REG_PWM,
REG_DDRA,
REG_DDRB,
REG_DDRC,
REG_DDRD,
REG_TEST,
REG_WR_ADDRL,
REG_WR_ADDRH,
REG_READH,
REG_READL,
REG_WRITEH,
REG_WRITEL,
REG_ID2,
};
struct seeed_panel_dev {
struct i2c_client *client;
struct device *dev;
int irq;
};
struct dcs_buffer {
u32 len;
union {
u32 val32;
char val8[4];
};
};
static int seeed_panel_i2c_write(struct i2c_client *client, u8 reg, u8 val)
{
struct i2c_msg msg;
u8 buf[2];
int ret;
buf[0] = reg;
buf[1] = val;
msg.addr = client->addr;
msg.flags = 0;
msg.buf = buf;
msg.len = 2;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret >= 0)
return 0;
dev_err(&client->dev,
"seeed panel i2c write reg(0x%x val:0x%x) failed !\n", reg, val);
return ret;
}
static int seeed_panel_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
{
struct i2c_msg msg[2];
u8 buf[2];
int ret;
buf[0] = reg;
msg[0].addr = client->addr;
msg[0].flags = 0;
msg[0].buf = buf;
msg[0].len = 1;
msg[1].addr = client->addr;
msg[1].flags = I2C_M_RD;
msg[1].buf = val;
msg[1].len = 1;
ret = i2c_transfer(client->adapter, msg, 2);
if (ret >= 0) {
return 0;
}
dev_err(&client->dev,
"seeed panel i2c read reg(0x%x val:0x%x) failed,ret = %d !\n", reg, *val, ret);
return ret;
}
#if 0
static int seeed_panel_disable(struct i2c_client *client)
{
seeed_panel_i2c_write(client, REG_PWM, 0);
seeed_panel_i2c_write(client, REG_POWERON, 0);
udelay(1);
return 0;
}
#endif
enum dsi_rgb_pattern_t {
RGB_PAT_WHITE,
RGB_PAT_BLACK,
RGB_PAT_RED,
RGB_PAT_GREEN,
RGB_PAT_BLUE,
RGB_PAT_HORIZ_COLORBAR,
RGB_PAT_VERT_COLORBAR,
RGB_PAT_NUM
};
static int seeed_panel_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
u8 reg_value = 0;
// int ret = 0;
int i;
struct seeed_panel_dev *seeed_panel;
// struct device *dev = &client->dev;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_warn(&client->dev,
"I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
return -EIO;
}
seeed_panel = devm_kzalloc(&client->dev,sizeof(struct seeed_panel_dev),
GFP_KERNEL);
if (!seeed_panel)
return -ENOMEM;
seeed_panel->client = client;
i2c_set_clientdata(client, seeed_panel);
seeed_panel_i2c_read(client, REG_ID, ®_value);
dev_info(&client->dev, "%s[%d],reg[0x80] = 0x%x\n",
__func__, __LINE__, reg_value);
switch (reg_value) {
case 0xde: /* ver 1 */
case 0xc3: /* ver 2 */
break;
default:
dev_err(&client->dev, "Unknown Atmel firmware revision: 0x%02x\n", reg_value);
return -ENODEV;
}
seeed_panel_i2c_write(client, REG_POWERON, 1);
mdelay(5);
/* Wait for nPWRDWN to go low to indicate poweron is done. */
for (i = 0; i < 100; i++) {
seeed_panel_i2c_read(client, REG_PORTB, ®_value);
if (reg_value & 1)
break;
}
seeed_panel_i2c_write(client, REG_PWM, 255);
seeed_panel_i2c_write(client, REG_PORTA, BIT(2));
return 0;
}
static int seeed_panel_remove(struct i2c_client *client)
{
return 0;
}
static const struct i2c_device_id seeed_panel_id[] = {
{ "seeed_panel", 0 },
{ }
};
static const struct of_device_id seeed_panel_dt_ids[] = {
{ .compatible = "seeed_panel", },
{ /* sentinel */ }
};
static struct i2c_driver seeed_panel_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "seeed_panel",
.of_match_table = seeed_panel_dt_ids,
},
.probe = seeed_panel_probe,
.remove = seeed_panel_remove,
.id_table = seeed_panel_id,
};
static __init int init_seeed_panel(void)
{
int err;
err = i2c_add_driver(&seeed_panel_driver);
if (err != 0)
printk("i2c driver registration failed, error=%d\n", err);
return err;
}
static __exit void exit_seeed_panel(void)
{
i2c_del_driver(&seeed_panel_driver);
}
//module_init(init_seeed_panel);
fs_initcall(init_seeed_panel);
module_exit(exit_seeed_panel);
MODULE_DESCRIPTION("A driver for seeed_panel");
MODULE_LICENSE("GPL");
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