--- /dev/null
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/display-sys.h>
+#include <linux/rk_screen.h>
+#include <linux/rk_fb.h>
+#ifdef CONFIG_OF
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#endif
+
+#include "../../edid.h"
+
+#ifdef CONFIG_SWITCH
+#include <linux/switch.h>
+#endif
+
+
+#define DDC_ADDR 0x50
+#define DDC_I2C_RATE 100*1000
+#define INVALID_GPIO -1
+#define GPIO_HIGH 1
+#define GPIO_LOW 0
+#define DISPLAY_SOURCE_LCDC0 0
+#define DISPLAY_SOURCE_LCDC1 1
+
+//static char *vgaenvent[] = {"INTERFACE=VGA", NULL};
+
+static const struct fb_videomode rk29_mode[] = {
+ //name refresh xres yres pixclock h_bp h_fp v_bp v_fp h_pw v_pw polariry PorI flag(used for vic)
+{ "1024x768p@60Hz", 60, 1024, 768, KHZ2PICOS(65000), 160, 24, 29, 3, 136, 6, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0 },
+{ "1280x720p@60Hz", 60, 1280, 720, KHZ2PICOS(74250), 220, 110, 20, 5, 40, 5, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0 },
+{ "1280x1024p@60Hz", 60, 1280, 1024, KHZ2PICOS(108000), 248, 48, 38, 1, 112, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0 },
+{ "1366x768p@60Hz", 60, 1366, 768, KHZ2PICOS(85500), 213, 70, 24, 3, 143, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0 },
+{ "1440x900p@60Hz", 60, 1440, 900, KHZ2PICOS(116500), 232, 80, 25, 3, 152, 6, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0 },
+{ "1680x1050p@60Hz", 60, 1680, 1050, KHZ2PICOS(146250), 280, 104, 30, 3, 176, 6, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0 },
+{ "1920x1080p@60Hz", 60, 1920, 1080, KHZ2PICOS(148500), 148, 88, 36, 4, 44, 5, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0 },
+};
+
+struct rockchip_vga {
+ struct device *dev; /*i2c device*/
+ struct rk_display_device *ddev; /*display device*/
+ struct i2c_client *client;
+ struct list_head modelist;
+ struct fb_monspecs specs;
+ struct rk_screen screen;
+ int indx;
+ int en_pin;
+ int en_val;
+ int lcdc_id;
+#ifdef CONFIG_SWITCH
+ struct switch_dev switch_vga;
+#endif
+};
+
+static int i2c_master_reg8_recv(const struct i2c_client *client,
+ const char reg, char *buf, int count, int scl_rate)
+{
+ struct i2c_adapter *adap=client->adapter;
+ struct i2c_msg msgs[2];
+ int ret;
+ char reg_buf = reg;
+
+ msgs[0].addr = client->addr;
+ msgs[0].flags = client->flags;
+ msgs[0].len = 1;
+ msgs[0].buf = ®_buf;
+ msgs[0].scl_rate = scl_rate;
+
+ msgs[1].addr = client->addr;
+ msgs[1].flags = client->flags | I2C_M_RD;
+ msgs[1].len = count;
+ msgs[1].buf = (char *)buf;
+ msgs[1].scl_rate = scl_rate;
+
+ ret = i2c_transfer(adap, msgs, 2);
+
+ return (ret == 2)? count : ret;
+}
+
+
+
+static unsigned char *rk29fb_ddc_read(struct i2c_client *client)
+{
+ int rc;
+ unsigned char *buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
+ if (!buf) {
+ dev_err(&client->dev, "unable to allocate memory for EDID\n");
+ return NULL;
+ }
+
+ /*Check ddc i2c communication is available or not*/
+ rc = i2c_master_reg8_recv(client, 0, buf, 6, DDC_I2C_RATE);
+ if (rc == 6) {
+ memset(buf, 0, EDID_LENGTH);
+ rc = i2c_master_reg8_recv(client, 0, buf, EDID_LENGTH, DDC_I2C_RATE);
+ if(rc == EDID_LENGTH)
+ return buf;
+ }
+
+ dev_err(&client->dev, "unable to read EDID block.\n");
+ kfree(buf);
+ return NULL;
+}
+
+static int vga_mode2screen(struct fb_videomode *modedb, struct rk_screen *screen)
+{
+ if(modedb == NULL || screen == NULL)
+ return -1;
+
+ memset(screen, 0, sizeof(struct rk_screen));
+ memcpy(&screen->mode, modedb, sizeof(*modedb));
+ screen->mode.pixclock = PICOS2KHZ(screen->mode.pixclock);
+ screen->mode.pixclock /= 250;
+ screen->mode.pixclock *= 250;
+ screen->mode.pixclock *= 1000;
+ screen->xsize = screen->mode.xres;
+ screen->ysize = screen->mode.yres;
+ screen->overscan.left = 100;
+ screen->overscan.top = 100;
+ screen->overscan.right = 100;
+ screen->overscan.bottom = 100;
+ /* screen type & face */
+ screen->type = SCREEN_RGB;
+ screen->face = OUT_P888;
+
+ screen->pin_vsync = (screen->mode.sync & FB_SYNC_VERT_HIGH_ACT) ? 1:0;
+ screen->pin_hsync = (screen->mode.sync & FB_SYNC_HOR_HIGH_ACT) ? 1:0;
+ screen->pin_den = 0;
+ screen->pin_dclk = 0;
+
+ /* Swap rule */
+ screen->swap_rb = 0;
+ screen->swap_rg = 0;
+ screen->swap_gb = 0;
+ screen->swap_delta = 0;
+ screen->swap_dumy = 0;
+ /* Operation function*/
+ screen->init = NULL;
+ screen->standby = NULL;
+ return 0;
+}
+
+
+static int vga_switch_screen(struct rockchip_vga *vga, int indx)
+{
+ struct fb_videomode *mode = &vga->specs.modedb[indx];
+ struct rk_screen *screen = &vga->screen;
+ vga_mode2screen(mode, screen);
+ rk_fb_switch_screen(screen, 1 ,vga->lcdc_id);
+ vga->indx = indx;
+ return 0;
+
+
+}
+static int vga_get_screen_info(struct rockchip_vga *vga)
+{
+ u8 *edid;
+ int i;
+ struct fb_monspecs *specs = &vga->specs;
+ struct list_head *modelist = &vga->modelist;
+ edid = rk29fb_ddc_read(vga->client);
+ if (!edid) {
+ dev_info(vga->dev, "get edid failed!\n");
+ return -EINVAL;
+ }
+ fb_edid_to_monspecs(edid,specs);
+ INIT_LIST_HEAD(modelist);
+ for (i = 0; i < specs->modedb_len; i++) {
+ fb_add_videomode(&specs->modedb[i], modelist);
+ dev_dbg(vga->dev, "%4dx%4d@%d---dclk:%ld\n",
+ specs->modedb[i].xres, specs->modedb[i].yres,
+ specs->modedb[i].refresh,
+ (PICOS2KHZ(specs->modedb[i].pixclock)/250)*250*1000);
+ }
+ return 0;
+
+}
+
+
+
+static int vga_get_modelist(struct rk_display_device *device,
+ struct list_head **modelist)
+{
+ struct rockchip_vga *vga = device->priv_data;
+ *modelist = &vga->modelist;
+ return 0;
+}
+
+static int vga_set_mode(struct rk_display_device *device,
+ struct fb_videomode *mode)
+{
+ struct rockchip_vga *vga = device->priv_data;
+ struct rk_screen *screen = &vga->screen;
+ vga_mode2screen(mode, screen);
+ rk_fb_switch_screen(screen, 1 ,vga->lcdc_id);
+ return 0;
+}
+
+static int vga_get_mode(struct rk_display_device *device,
+ struct fb_videomode *mode)
+{
+ //struct vga *vga = device->priv_data;
+ //struct fb_videomode *vmode;
+
+ return 0;
+}
+
+struct rk_display_ops vga_display_ops = {
+ .getmodelist = vga_get_modelist,
+ .setmode = vga_set_mode,
+ .getmode = vga_get_mode,
+};
+
+static int vga_display_probe(struct rk_display_device *device, void *devdata)
+{
+ device->owner = THIS_MODULE;
+ strcpy(device->type, "VGA");
+ device->priority = DISPLAY_PRIORITY_VGA;
+ device->priv_data = devdata;
+ device->ops = &vga_display_ops;
+ return 1;
+}
+
+static struct rk_display_driver display_vga = {
+ .probe = vga_display_probe,
+};
+
+
+
+struct rk_display_device * vga_register_display_sysfs(struct rockchip_vga *vga)
+{
+ return rk_display_device_register(&display_vga, vga->dev, vga);
+}
+
+void vga_unregister_display_sysfs(struct rockchip_vga *vga)
+{
+ if (vga->ddev)
+ rk_display_device_unregister(vga->ddev);
+}
+
+
+static int vga_i2c_probe(struct i2c_client *client,const struct i2c_device_id *id)
+{
+ int ret;
+ struct rockchip_vga *vga;
+ struct device_node *np = client->dev.of_node;
+ enum of_gpio_flags pwr_flags;
+
+ if (!np) {
+ dev_err(&client->dev, "no device node found!\n");
+ return -EINVAL;
+ }
+
+ vga = devm_kzalloc(&client->dev, sizeof(*vga), GFP_KERNEL);
+ if (!vga) {
+ dev_err(&client->dev, "allocate for vga failed!\n");
+ return -ENOMEM;
+ }
+
+ vga->client = client;
+ vga->dev = &client->dev;
+ i2c_set_clientdata(client, vga);
+ vga->ddev = vga_register_display_sysfs(vga);
+ if (IS_ERR(vga->ddev))
+ dev_warn(vga->dev, "Unable to create device for vga :%ld",
+ PTR_ERR(vga->ddev));
+
+ vga->en_pin = of_get_named_gpio_flags(np, "pwr_gpio", 0, &pwr_flags);
+ if (!gpio_is_valid(vga->en_pin)) {
+ dev_err(vga->dev, "failed to get pwr_gpio!\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ vga->en_val = (pwr_flags & OF_GPIO_ACTIVE_LOW) ? 0 : 1;
+ vga->lcdc_id = DISPLAY_SOURCE_LCDC1;
+
+ ret = devm_gpio_request(vga->dev, vga->en_pin, "pwr_pin");
+ if(ret < 0) {
+ dev_err(vga->dev, "request for pwr_pin failed!\n ");
+ goto err;
+ }
+ gpio_direction_output(vga->en_pin, vga->en_val);
+ ret = vga_get_screen_info(vga);
+ if (ret < 0)
+ goto err;
+ vga_switch_screen(vga, 7);
+
+ printk("VGA probe successful\n");
+ return 0;
+err:
+ vga_unregister_display_sysfs(vga);
+ return ret;
+
+}
+
+
+static int vga_i2c_remove(struct i2c_client *client)
+{
+ return 0;
+}
+
+
+#if defined(CONFIG_OF)
+static struct of_device_id vga_dt_ids[] = {
+ {.compatible = "rockchip,vga" },
+ { }
+};
+#endif
+
+static const struct i2c_device_id vga_id[] = {
+ { "vga_i2c", 0 },
+ { }
+};
+
+static struct i2c_driver vga_i2c_driver = {
+ .driver = {
+ .name = "vga_i2c",
+ .owner = THIS_MODULE,
+#if defined(CONFIG_OF)
+ .of_match_table = of_match_ptr(vga_dt_ids),
+#endif
+ },
+ .probe = &vga_i2c_probe,
+ .remove = &vga_i2c_remove,
+ .id_table = vga_id,
+};
+
+static int __init rockchip_vga_init(void)
+{
+ return i2c_add_driver(&vga_i2c_driver);
+}
+
+static void __exit rockchip_vga_exit(void)
+{
+ i2c_del_driver(&vga_i2c_driver);
+}
+
+module_init(rockchip_vga_init);
+module_exit(rockchip_vga_exit);
projects / firefly-linux-kernel-4.4.55.git / commitdiff