--- /dev/null
+/*
+ * Copyright 2017 NXP
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/pm_runtime.h>
+#include <video/mxc_edid.h>
+
+#include "mipi_dsi.h"
+
+/* main registers addr*/
+#define ADV7535_CHIP_REVISION 0x0
+#define ADV7535_DSI_CEC_ADDR 0xE1
+
+struct adv7535_info {
+ int rev;
+ struct device *dev;
+ struct i2c_client *i2c_main;
+ struct i2c_client *i2c_dsi_cec;
+ struct fb_videomode *fb_vmode;
+ unsigned int bpp;
+};
+
+static int adv7535_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int adv7535_remove(struct i2c_client *client);
+static int adv7535_detect(struct i2c_client *client,
+ struct i2c_board_info *info);
+
+static const struct i2c_device_id adv7535_id[] = {
+ {"adv7535", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, adv7535_id);
+
+static const struct of_device_id adv7535_dt_ids[] = {
+ { .compatible = "adi,adv7535", .data = NULL, },
+ { /* sentinel */ }
+};
+
+static struct i2c_driver adv7535_i2c_driver = {
+ .driver = {
+ .name = "adv7535",
+ .owner = THIS_MODULE,
+ .of_match_table = adv7535_dt_ids,
+ },
+ .probe = adv7535_probe,
+ .remove = adv7535_remove,
+ .id_table = adv7535_id,
+ .detect = adv7535_detect,
+};
+
+#define adv7535_write_reg(reg, val) { \
+ int err; \
+ \
+ err = i2c_smbus_write_byte_data(client, reg, val); \
+ if (err < 0) { \
+ dev_err(&client->dev, \
+ "%s:write reg error:reg=%2x, val=%2x\n",\
+ __func__, reg, val); \
+ return err; \
+ } \
+} \
+
+static int adv7535_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
+{
+ s8 ret;
+ u8 chip_rev;
+ struct i2c_adapter *adapter = client->adapter;
+
+ /* check i2c functionality */
+ if (!i2c_check_functionality(adapter, I2C_FUNC_I2C |
+ I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ /* i2c detection */
+ ret = i2c_smbus_read_byte_data(client,
+ ADV7535_CHIP_REVISION);
+ if (ret < 0) {
+ dev_err(&adapter->dev, "ADV7535 not found\n");
+ return -ENODEV;
+ }
+
+ chip_rev = ret;
+ if (chip_rev != 0x14) {
+ dev_info(&adapter->dev, "Unsupported chip id: 0x%2x\n",
+ chip_rev);
+ return -ENODEV;
+ }
+
+ dev_info(&adapter->dev, "chip_rev = 0x%x\n", ret);
+ return 0;
+}
+
+static int adv7535_setup_cfg(struct adv7535_info *info)
+{
+ struct i2c_client *client = NULL;
+
+ client = info->i2c_main;
+ adv7535_write_reg(0xd6, 0x48); /* HPD Override */
+ adv7535_write_reg(0x41, 0x10); /* Power Up */
+
+ adv7535_write_reg(0x16, 0x20); /* Fixed Init */
+ adv7535_write_reg(0x9A, 0xE0);
+ adv7535_write_reg(0xBA, 0x70);
+ adv7535_write_reg(0xDE, 0x82);
+ adv7535_write_reg(0xE4, 0x40);
+ adv7535_write_reg(0xE5, 0x80);
+
+ client = info->i2c_dsi_cec;
+ adv7535_write_reg(0x15, 0xD0);
+ adv7535_write_reg(0x17, 0xD0);
+ adv7535_write_reg(0x24, 0x20);
+ adv7535_write_reg(0x57, 0x11);
+
+ return 0;
+}
+
+static int adv7535_vmode_cfg(struct adv7535_info *info)
+{
+ struct i2c_client *client = NULL;
+ struct fb_videomode *fb_vmode = info->fb_vmode;
+ u32 line_length, frame_height;
+ u8 low, high;
+
+ line_length = fb_vmode->xres + fb_vmode->left_margin +
+ fb_vmode->right_margin + fb_vmode->hsync_len;
+ frame_height = fb_vmode->yres + fb_vmode->upper_margin +
+ fb_vmode->lower_margin + fb_vmode->vsync_len;
+
+ client = info->i2c_dsi_cec;
+ adv7535_write_reg(0x1C, 0x20); /* 2 Data Lanes */
+ adv7535_write_reg(0x16, 0x00); /* Pixel Clock */
+ adv7535_write_reg(0x27, 0xCB); /* INT_TIMING_GEN */
+
+ /* video mode settings */
+ low = (line_length << 4);
+ high = (line_length >> 4);
+ adv7535_write_reg(0x28, high); /* Total Line Length */
+ adv7535_write_reg(0x29, low);
+
+ low = (fb_vmode->hsync_len << 4);
+ high = (fb_vmode->hsync_len >> 4);
+ adv7535_write_reg(0x2A, high); /* Hsync Active Width */
+ adv7535_write_reg(0x2B, low);
+
+ low = (fb_vmode->right_margin << 4);
+ high = (fb_vmode->right_margin >> 4);
+ adv7535_write_reg(0x2C, high); /* Horizontal FP Width */
+ adv7535_write_reg(0x2D, low);
+
+ low = (fb_vmode->left_margin << 4);
+ high = (fb_vmode->left_margin >> 4);
+ adv7535_write_reg(0x2E, high); /* Horizontal BP Width */
+ adv7535_write_reg(0x2F, low);
+
+ low = (frame_height << 4);
+ high = (frame_height >> 4);
+ adv7535_write_reg(0x30, high); /* Total Frame Height */
+ adv7535_write_reg(0x31, low);
+
+ low = (fb_vmode->vsync_len << 4);
+ high = (fb_vmode->vsync_len >> 4);
+ adv7535_write_reg(0x32, high); /* Vsync Active Height */
+ adv7535_write_reg(0x33, low);
+
+ low = (fb_vmode->lower_margin << 4);
+ high = (fb_vmode->lower_margin >> 4);
+ adv7535_write_reg(0x34, high); /* Vertical FP Height */
+ adv7535_write_reg(0x35, low);
+
+ low = (fb_vmode->upper_margin << 4);
+ high = (fb_vmode->upper_margin >> 4);
+ adv7535_write_reg(0x36, high); /* Vertical BP Height */
+ adv7535_write_reg(0x37, low);
+
+ /* Reset Internal Timing Generator */
+ adv7535_write_reg(0x27, 0xCB);
+ adv7535_write_reg(0x27, 0x8B);
+ adv7535_write_reg(0x27, 0xCB);
+
+ client = info->i2c_main;
+ adv7535_write_reg(0xAF, 0x16); /* HDMI Output */
+ adv7535_write_reg(0x55, 0x10); /* AVI Info-frame */
+ adv7535_write_reg(0x56, 0x18);
+ adv7535_write_reg(0x40, 0x80); /* GCP Enable */
+ adv7535_write_reg(0x4C, 0x04); /* 24bpp */
+ adv7535_write_reg(0x49, 0x00);
+ adv7535_write_reg(0x17, 0x60); /* VS & HS Low Polarity, DE disabled */
+
+ /*TODO Audio Setup */
+
+ client = info->i2c_dsi_cec;
+ adv7535_write_reg(0xBE, 0x3D); /* CEC Power Mode */
+
+ adv7535_write_reg(0x03, 0x89);
+
+ return 0;
+}
+
+static int adv7535_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ u32 vmode_index;
+ int ret = 0, addr;
+ struct adv7535_info *info;
+ struct device *dev = &client->dev;
+ struct device_node *endpoint = NULL;
+
+ pr_info("adv7535 probing phase\n");
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = &client->dev;
+ info->i2c_main = client;
+ i2c_set_clientdata(client, info);
+
+ dev_info(dev, "main addr = 0x%x\n", info->i2c_main->addr);
+ /* get dsi source endpoint */
+ endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+ if (!endpoint) {
+ dev_err(dev, "DSI source endpoint not exsit\n");
+ ret = -ENODEV;
+ goto err1;
+ }
+
+ info->fb_vmode = devm_kzalloc(dev, sizeof(struct fb_videomode),
+ GFP_KERNEL);
+ if (!info->fb_vmode) {
+ return -ENOMEM;
+ goto err1;
+ }
+
+ ret = of_property_read_u32(dev->of_node, "video-mode", &vmode_index);
+ if (ret < 0) {
+ dev_err(dev, "failed to get required video mode\n");
+ goto err2;
+ }
+ if (vmode_index >= ARRAY_SIZE(mxc_cea_mode))
+ goto err2;
+
+ memcpy(info->fb_vmode, &mxc_cea_mode[vmode_index],
+ sizeof(struct fb_videomode));
+
+ ret = of_property_read_u32(dev->of_node, "bpp", &info->bpp);
+ if (ret < 0) {
+ dev_err(dev, "failed to get bpp\n");
+ goto err2;
+ }
+
+ if ((ret = adv7535_detect(client, NULL)))
+ goto err2;
+
+ addr = i2c_smbus_read_byte_data(client,
+ ADV7535_DSI_CEC_ADDR);
+ if (addr < 0) {
+ dev_err(dev, "Cannot get dsi_cec addr\n");
+ ret = addr;
+ goto err2;
+ }
+
+ dev_info(dev, "dsi cec addr = 0x%x\n", addr);
+ info->i2c_dsi_cec = i2c_new_dummy(client->adapter, addr >> 1);
+ if (!info->i2c_dsi_cec) {
+ dev_err(dev, "Failed to allocate I2C device for dsi_cec\n");
+ ret = -ENOMEM;
+ goto err2;
+ }
+
+ i2c_set_clientdata(info->i2c_dsi_cec, info);
+
+ /*TODO interrupts */
+
+ if ((ret = adv7535_setup_cfg(info)))
+ goto err3;
+
+ if ((ret = adv7535_vmode_cfg(info)))
+ goto err3;
+
+ pm_runtime_enable(info->dev);
+
+ dev_info(dev, "adv7535 probe finished\n");
+
+ return 0;
+err3:
+ i2c_unregister_device(info->i2c_dsi_cec);
+err2:
+ devm_kfree(dev, info->fb_vmode);
+err1:
+ devm_kfree(dev, info);
+
+ return ret;
+}
+
+static int adv7535_remove(struct i2c_client *client)
+{
+ struct adv7535_info *info;
+
+ info = i2c_get_clientdata(client);
+ i2c_set_clientdata(client, NULL);
+
+ pm_runtime_disable(info->dev);
+
+ i2c_unregister_device(info->i2c_dsi_cec);
+
+ kfree(info->fb_vmode);
+ kfree(info);
+
+ return 0;
+}
+
+static __init int adv7535_init(void)
+{
+ u8 err = 0;
+
+ pr_info("In adv7535_init\n");
+
+ err = i2c_add_driver(&adv7535_i2c_driver);
+ if (err != 0)
+ pr_err("%s: i2c driver register failed, error = %d\n",
+ __func__, err);
+
+ return err;
+}
+
+static void __exit adv7535_exit(void)
+{
+ i2c_del_driver(&adv7535_i2c_driver);
+}
+
+module_init(adv7535_init);
+module_exit(adv7535_exit);
+
+MODULE_AUTHOR("NXP Semiconductor");
+MODULE_DESCRIPTION("ADV7535 video encoder driver");
+MODULE_LICENSE("GPL");
projects / linux.git / commitdiff