--- /dev/null
+/* #define DEBUG */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/backlight.h>
+#include <linux/fb.h>
+
+#include <video/omapdss.h>
+#include <video/omap-panel-n8x0.h>
+
+#define BLIZZARD_REV_CODE 0x00
+#define BLIZZARD_CONFIG 0x02
+#define BLIZZARD_PLL_DIV 0x04
+#define BLIZZARD_PLL_LOCK_RANGE 0x06
+#define BLIZZARD_PLL_CLOCK_SYNTH_0 0x08
+#define BLIZZARD_PLL_CLOCK_SYNTH_1 0x0a
+#define BLIZZARD_PLL_MODE 0x0c
+#define BLIZZARD_CLK_SRC 0x0e
+#define BLIZZARD_MEM_BANK0_ACTIVATE 0x10
+#define BLIZZARD_MEM_BANK0_STATUS 0x14
+#define BLIZZARD_PANEL_CONFIGURATION 0x28
+#define BLIZZARD_HDISP 0x2a
+#define BLIZZARD_HNDP 0x2c
+#define BLIZZARD_VDISP0 0x2e
+#define BLIZZARD_VDISP1 0x30
+#define BLIZZARD_VNDP 0x32
+#define BLIZZARD_HSW 0x34
+#define BLIZZARD_VSW 0x38
+#define BLIZZARD_DISPLAY_MODE 0x68
+#define BLIZZARD_INPUT_WIN_X_START_0 0x6c
+#define BLIZZARD_DATA_SOURCE_SELECT 0x8e
+#define BLIZZARD_DISP_MEM_DATA_PORT 0x90
+#define BLIZZARD_DISP_MEM_READ_ADDR0 0x92
+#define BLIZZARD_POWER_SAVE 0xE6
+#define BLIZZARD_NDISP_CTRL_STATUS 0xE8
+
+/* Data source select */
+/* For S1D13745 */
+#define BLIZZARD_SRC_WRITE_LCD_BACKGROUND 0x00
+#define BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE 0x01
+#define BLIZZARD_SRC_WRITE_OVERLAY_ENABLE 0x04
+#define BLIZZARD_SRC_DISABLE_OVERLAY 0x05
+/* For S1D13744 */
+#define BLIZZARD_SRC_WRITE_LCD 0x00
+#define BLIZZARD_SRC_BLT_LCD 0x06
+
+#define BLIZZARD_COLOR_RGB565 0x01
+#define BLIZZARD_COLOR_YUV420 0x09
+
+#define BLIZZARD_VERSION_S1D13745 0x01 /* Hailstorm */
+#define BLIZZARD_VERSION_S1D13744 0x02 /* Blizzard */
+
+#define MIPID_CMD_READ_DISP_ID 0x04
+#define MIPID_CMD_READ_RED 0x06
+#define MIPID_CMD_READ_GREEN 0x07
+#define MIPID_CMD_READ_BLUE 0x08
+#define MIPID_CMD_READ_DISP_STATUS 0x09
+#define MIPID_CMD_RDDSDR 0x0F
+#define MIPID_CMD_SLEEP_IN 0x10
+#define MIPID_CMD_SLEEP_OUT 0x11
+#define MIPID_CMD_DISP_OFF 0x28
+#define MIPID_CMD_DISP_ON 0x29
+
+static struct panel_drv_data {
+ struct mutex lock;
+
+ struct omap_dss_device *dssdev;
+ struct spi_device *spidev;
+ struct backlight_device *bldev;
+
+ int blizzard_ver;
+} s_drv_data;
+
+
+static inline
+struct panel_n8x0_data *get_board_data(const struct omap_dss_device *dssdev)
+{
+ return dssdev->data;
+}
+
+static inline
+struct panel_drv_data *get_drv_data(const struct omap_dss_device *dssdev)
+{
+ return &s_drv_data;
+}
+
+
+static inline void blizzard_cmd(u8 cmd)
+{
+ omap_rfbi_write_command(&cmd, 1);
+}
+
+static inline void blizzard_write(u8 cmd, const u8 *buf, int len)
+{
+ omap_rfbi_write_command(&cmd, 1);
+ omap_rfbi_write_data(buf, len);
+}
+
+static inline void blizzard_read(u8 cmd, u8 *buf, int len)
+{
+ omap_rfbi_write_command(&cmd, 1);
+ omap_rfbi_read_data(buf, len);
+}
+
+static u8 blizzard_read_reg(u8 cmd)
+{
+ u8 data;
+ blizzard_read(cmd, &data, 1);
+ return data;
+}
+
+static void blizzard_ctrl_setup_update(struct omap_dss_device *dssdev,
+ int x, int y, int w, int h)
+{
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+ u8 tmp[18];
+ int x_end, y_end;
+
+ x_end = x + w - 1;
+ y_end = y + h - 1;
+
+ tmp[0] = x;
+ tmp[1] = x >> 8;
+ tmp[2] = y;
+ tmp[3] = y >> 8;
+ tmp[4] = x_end;
+ tmp[5] = x_end >> 8;
+ tmp[6] = y_end;
+ tmp[7] = y_end >> 8;
+
+ /* scaling? */
+ tmp[8] = x;
+ tmp[9] = x >> 8;
+ tmp[10] = y;
+ tmp[11] = y >> 8;
+ tmp[12] = x_end;
+ tmp[13] = x_end >> 8;
+ tmp[14] = y_end;
+ tmp[15] = y_end >> 8;
+
+ tmp[16] = BLIZZARD_COLOR_RGB565;
+
+ if (ddata->blizzard_ver == BLIZZARD_VERSION_S1D13745)
+ tmp[17] = BLIZZARD_SRC_WRITE_LCD_BACKGROUND;
+ else
+ tmp[17] = ddata->blizzard_ver == BLIZZARD_VERSION_S1D13744 ?
+ BLIZZARD_SRC_WRITE_LCD :
+ BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE;
+
+ omap_rfbi_configure(dssdev, 16, 8);
+
+ blizzard_write(BLIZZARD_INPUT_WIN_X_START_0, tmp, 18);
+
+ omap_rfbi_configure(dssdev, 16, 16);
+}
+
+static void mipid_transfer(struct spi_device *spi, int cmd, const u8 *wbuf,
+ int wlen, u8 *rbuf, int rlen)
+{
+ struct spi_message m;
+ struct spi_transfer *x, xfer[4];
+ u16 w;
+ int r;
+
+ spi_message_init(&m);
+
+ memset(xfer, 0, sizeof(xfer));
+ x = &xfer[0];
+
+ cmd &= 0xff;
+ x->tx_buf = &cmd;
+ x->bits_per_word = 9;
+ x->len = 2;
+ spi_message_add_tail(x, &m);
+
+ if (wlen) {
+ x++;
+ x->tx_buf = wbuf;
+ x->len = wlen;
+ x->bits_per_word = 9;
+ spi_message_add_tail(x, &m);
+ }
+
+ if (rlen) {
+ x++;
+ x->rx_buf = &w;
+ x->len = 1;
+ spi_message_add_tail(x, &m);
+
+ if (rlen > 1) {
+ /* Arrange for the extra clock before the first
+ * data bit.
+ */
+ x->bits_per_word = 9;
+ x->len = 2;
+
+ x++;
+ x->rx_buf = &rbuf[1];
+ x->len = rlen - 1;
+ spi_message_add_tail(x, &m);
+ }
+ }
+
+ r = spi_sync(spi, &m);
+ if (r < 0)
+ dev_dbg(&spi->dev, "spi_sync %d\n", r);
+
+ if (rlen)
+ rbuf[0] = w & 0xff;
+}
+
+static inline void mipid_cmd(struct spi_device *spi, int cmd)
+{
+ mipid_transfer(spi, cmd, NULL, 0, NULL, 0);
+}
+
+static inline void mipid_write(struct spi_device *spi,
+ int reg, const u8 *buf, int len)
+{
+ mipid_transfer(spi, reg, buf, len, NULL, 0);
+}
+
+static inline void mipid_read(struct spi_device *spi,
+ int reg, u8 *buf, int len)
+{
+ mipid_transfer(spi, reg, NULL, 0, buf, len);
+}
+
+static void set_data_lines(struct spi_device *spi, int data_lines)
+{
+ u16 par;
+
+ switch (data_lines) {
+ case 16:
+ par = 0x150;
+ break;
+ case 18:
+ par = 0x160;
+ break;
+ case 24:
+ par = 0x170;
+ break;
+ }
+
+ mipid_write(spi, 0x3a, (u8 *)&par, 2);
+}
+
+static void send_init_string(struct spi_device *spi)
+{
+ u16 initpar[] = { 0x0102, 0x0100, 0x0100 };
+ mipid_write(spi, 0xc2, (u8 *)initpar, sizeof(initpar));
+}
+
+static void send_display_on(struct spi_device *spi)
+{
+ mipid_cmd(spi, MIPID_CMD_DISP_ON);
+}
+
+static void send_display_off(struct spi_device *spi)
+{
+ mipid_cmd(spi, MIPID_CMD_DISP_OFF);
+}
+
+static void send_sleep_out(struct spi_device *spi)
+{
+ mipid_cmd(spi, MIPID_CMD_SLEEP_OUT);
+ msleep(120);
+}
+
+static void send_sleep_in(struct spi_device *spi)
+{
+ mipid_cmd(spi, MIPID_CMD_SLEEP_IN);
+ msleep(50);
+}
+
+static int n8x0_panel_power_on(struct omap_dss_device *dssdev)
+{
+ int r;
+ struct panel_n8x0_data *bdata = get_board_data(dssdev);
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+ struct spi_device *spi = ddata->spidev;
+ u8 rev, conf;
+ u8 display_id[3];
+ const char *panel_name;
+
+ if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+ return 0;
+
+ gpio_direction_output(bdata->ctrl_pwrdown, 1);
+
+ if (bdata->platform_enable) {
+ r = bdata->platform_enable(dssdev);
+ if (r)
+ goto err_plat_en;
+ }
+
+ r = omapdss_rfbi_display_enable(dssdev);
+ if (r)
+ goto err_rfbi_en;
+
+ rev = blizzard_read_reg(BLIZZARD_REV_CODE);
+ conf = blizzard_read_reg(BLIZZARD_CONFIG);
+
+ switch (rev & 0xfc) {
+ case 0x9c:
+ ddata->blizzard_ver = BLIZZARD_VERSION_S1D13744;
+ dev_info(&dssdev->dev, "s1d13744 LCD controller rev %d "
+ "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
+ break;
+ case 0xa4:
+ ddata->blizzard_ver = BLIZZARD_VERSION_S1D13745;
+ dev_info(&dssdev->dev, "s1d13745 LCD controller rev %d "
+ "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
+ break;
+ default:
+ dev_err(&dssdev->dev, "invalid s1d1374x revision %02x\n", rev);
+ r = -ENODEV;
+ goto err_inv_chip;
+ }
+
+ /* panel */
+
+ gpio_direction_output(bdata->panel_reset, 1);
+
+ mipid_read(spi, MIPID_CMD_READ_DISP_ID, display_id, 3);
+ dev_dbg(&spi->dev, "MIPI display ID: %02x%02x%02x\n",
+ display_id[0], display_id[1], display_id[2]);
+
+ switch (display_id[0]) {
+ case 0x45:
+ panel_name = "lph8923";
+ break;
+ case 0x83:
+ panel_name = "ls041y3";
+ break;
+ default:
+ dev_err(&dssdev->dev, "invalid display ID 0x%x\n",
+ display_id[0]);
+ r = -ENODEV;
+ goto err_inv_panel;
+ }
+
+ dev_info(&dssdev->dev, "%s rev %02x LCD detected\n",
+ panel_name, display_id[1]);
+
+ send_sleep_out(spi);
+ send_init_string(spi);
+ set_data_lines(spi, 24);
+ send_display_on(spi);
+
+ return 0;
+
+err_inv_panel:
+ /*
+ * HACK: we should turn off the panel here, but there is some problem
+ * with the initialization sequence, and we fail to init the panel if we
+ * have turned it off
+ */
+ /* gpio_direction_output(bdata->panel_reset, 0); */
+err_inv_chip:
+ omapdss_rfbi_display_disable(dssdev);
+err_rfbi_en:
+ if (bdata->platform_disable)
+ bdata->platform_disable(dssdev);
+err_plat_en:
+ gpio_direction_output(bdata->ctrl_pwrdown, 0);
+ return r;
+}
+
+static void n8x0_panel_power_off(struct omap_dss_device *dssdev)
+{
+ struct panel_n8x0_data *bdata = get_board_data(dssdev);
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+ struct spi_device *spi = ddata->spidev;
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+ return;
+
+ send_display_off(spi);
+ send_sleep_in(spi);
+
+ if (bdata->platform_disable)
+ bdata->platform_disable(dssdev);
+
+ /*
+ * HACK: we should turn off the panel here, but there is some problem
+ * with the initialization sequence, and we fail to init the panel if we
+ * have turned it off
+ */
+ /* gpio_direction_output(bdata->panel_reset, 0); */
+ gpio_direction_output(bdata->ctrl_pwrdown, 0);
+ omapdss_rfbi_display_disable(dssdev);
+}
+
+static const struct rfbi_timings n8x0_panel_timings = {
+ .cs_on_time = 0,
+
+ .we_on_time = 9000,
+ .we_off_time = 18000,
+ .we_cycle_time = 36000,
+
+ .re_on_time = 9000,
+ .re_off_time = 27000,
+ .re_cycle_time = 36000,
+
+ .access_time = 27000,
+ .cs_off_time = 36000,
+
+ .cs_pulse_width = 0,
+};
+
+static int n8x0_bl_update_status(struct backlight_device *dev)
+{
+ struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
+ struct panel_n8x0_data *bdata = get_board_data(dssdev);
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+ int r;
+ int level;
+
+ mutex_lock(&ddata->lock);
+
+ if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+ dev->props.power == FB_BLANK_UNBLANK)
+ level = dev->props.brightness;
+ else
+ level = 0;
+
+ dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
+
+ if (!bdata->set_backlight)
+ r = -EINVAL;
+ else
+ r = bdata->set_backlight(dssdev, level);
+
+ mutex_unlock(&ddata->lock);
+
+ return r;
+}
+
+static int n8x0_bl_get_intensity(struct backlight_device *dev)
+{
+ if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+ dev->props.power == FB_BLANK_UNBLANK)
+ return dev->props.brightness;
+
+ return 0;
+}
+
+static const struct backlight_ops n8x0_bl_ops = {
+ .get_brightness = n8x0_bl_get_intensity,
+ .update_status = n8x0_bl_update_status,
+};
+
+static int n8x0_panel_probe(struct omap_dss_device *dssdev)
+{
+ struct panel_n8x0_data *bdata = get_board_data(dssdev);
+ struct panel_drv_data *ddata;
+ struct backlight_device *bldev;
+ struct backlight_properties props;
+ int r;
+
+ dev_dbg(&dssdev->dev, "probe\n");
+
+ if (!bdata)
+ return -EINVAL;
+
+ s_drv_data.dssdev = dssdev;
+
+ ddata = &s_drv_data;
+
+ mutex_init(&ddata->lock);
+
+ dssdev->panel.config = OMAP_DSS_LCD_TFT;
+ dssdev->panel.timings.x_res = 800;
+ dssdev->panel.timings.y_res = 480;
+ dssdev->ctrl.pixel_size = 16;
+ dssdev->ctrl.rfbi_timings = n8x0_panel_timings;
+
+ memset(&props, 0, sizeof(props));
+ props.max_brightness = 127;
+ props.type = BACKLIGHT_PLATFORM;
+ bldev = backlight_device_register(dev_name(&dssdev->dev), &dssdev->dev,
+ dssdev, &n8x0_bl_ops, &props);
+ if (IS_ERR(bldev)) {
+ r = PTR_ERR(bldev);
+ dev_err(&dssdev->dev, "register backlight failed\n");
+ return r;
+ }
+
+ ddata->bldev = bldev;
+
+ bldev->props.fb_blank = FB_BLANK_UNBLANK;
+ bldev->props.power = FB_BLANK_UNBLANK;
+ bldev->props.brightness = 127;
+
+ n8x0_bl_update_status(bldev);
+
+ return 0;
+}
+
+static void n8x0_panel_remove(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+ struct backlight_device *bldev;
+
+ dev_dbg(&dssdev->dev, "remove\n");
+
+ bldev = ddata->bldev;
+ bldev->props.power = FB_BLANK_POWERDOWN;
+ n8x0_bl_update_status(bldev);
+ backlight_device_unregister(bldev);
+
+ dev_set_drvdata(&dssdev->dev, NULL);
+}
+
+static int n8x0_panel_enable(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+ int r;
+
+ dev_dbg(&dssdev->dev, "enable\n");
+
+ mutex_lock(&ddata->lock);
+
+ rfbi_bus_lock();
+
+ r = n8x0_panel_power_on(dssdev);
+
+ rfbi_bus_unlock();
+
+ if (r) {
+ mutex_unlock(&ddata->lock);
+ return r;
+ }
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ mutex_unlock(&ddata->lock);
+
+ return 0;
+}
+
+static void n8x0_panel_disable(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+
+ dev_dbg(&dssdev->dev, "disable\n");
+
+ mutex_lock(&ddata->lock);
+
+ rfbi_bus_lock();
+
+ n8x0_panel_power_off(dssdev);
+
+ rfbi_bus_unlock();
+
+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+
+ mutex_unlock(&ddata->lock);
+}
+
+static int n8x0_panel_suspend(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+
+ dev_dbg(&dssdev->dev, "suspend\n");
+
+ mutex_lock(&ddata->lock);
+
+ rfbi_bus_lock();
+
+ n8x0_panel_power_off(dssdev);
+
+ rfbi_bus_unlock();
+
+ dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+
+ mutex_unlock(&ddata->lock);
+
+ return 0;
+}
+
+static int n8x0_panel_resume(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+ int r;
+
+ dev_dbg(&dssdev->dev, "resume\n");
+
+ mutex_lock(&ddata->lock);
+
+ rfbi_bus_lock();
+
+ r = n8x0_panel_power_on(dssdev);
+
+ rfbi_bus_unlock();
+
+ if (r) {
+ mutex_unlock(&ddata->lock);
+ return r;
+ }
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ mutex_unlock(&ddata->lock);
+
+ return 0;
+}
+
+static void n8x0_panel_get_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ *timings = dssdev->panel.timings;
+}
+
+static void n8x0_panel_get_resolution(struct omap_dss_device *dssdev,
+ u16 *xres, u16 *yres)
+{
+ *xres = dssdev->panel.timings.x_res;
+ *yres = dssdev->panel.timings.y_res;
+}
+
+static void update_done(void *data)
+{
+ rfbi_bus_unlock();
+}
+
+static int n8x0_panel_update(struct omap_dss_device *dssdev,
+ u16 x, u16 y, u16 w, u16 h)
+{
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+
+ dev_dbg(&dssdev->dev, "update\n");
+
+ mutex_lock(&ddata->lock);
+ rfbi_bus_lock();
+
+ omap_rfbi_prepare_update(dssdev, &x, &y, &w, &h);
+
+ blizzard_ctrl_setup_update(dssdev, x, y, w, h);
+
+ omap_rfbi_update(dssdev, x, y, w, h, update_done, NULL);
+
+ mutex_unlock(&ddata->lock);
+
+ return 0;
+}
+
+static int n8x0_panel_sync(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = get_drv_data(dssdev);
+
+ dev_dbg(&dssdev->dev, "sync\n");
+
+ mutex_lock(&ddata->lock);
+ rfbi_bus_lock();
+ rfbi_bus_unlock();
+ mutex_unlock(&ddata->lock);
+
+ return 0;
+}
+
+static struct omap_dss_driver n8x0_panel_driver = {
+ .probe = n8x0_panel_probe,
+ .remove = n8x0_panel_remove,
+
+ .enable = n8x0_panel_enable,
+ .disable = n8x0_panel_disable,
+ .suspend = n8x0_panel_suspend,
+ .resume = n8x0_panel_resume,
+
+ .update = n8x0_panel_update,
+ .sync = n8x0_panel_sync,
+
+ .get_resolution = n8x0_panel_get_resolution,
+ .get_recommended_bpp = omapdss_default_get_recommended_bpp,
+
+ .get_timings = n8x0_panel_get_timings,
+
+ .driver = {
+ .name = "n8x0_panel",
+ .owner = THIS_MODULE,
+ },
+};
+
+/* PANEL */
+
+static int mipid_spi_probe(struct spi_device *spi)
+{
+ dev_dbg(&spi->dev, "mipid_spi_probe\n");
+
+ spi->mode = SPI_MODE_0;
+
+ s_drv_data.spidev = spi;
+
+ return 0;
+}
+
+static int mipid_spi_remove(struct spi_device *spi)
+{
+ dev_dbg(&spi->dev, "mipid_spi_remove\n");
+ return 0;
+}
+
+static struct spi_driver mipid_spi_driver = {
+ .driver = {
+ .name = "lcd_mipid",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = mipid_spi_probe,
+ .remove = __devexit_p(mipid_spi_remove),
+};
+
+static int __init n8x0_panel_drv_init(void)
+{
+ int r;
+
+ r = spi_register_driver(&mipid_spi_driver);
+ if (r) {
+ pr_err("n8x0_panel: spi driver registration failed\n");
+ return r;
+ }
+
+ r = omap_dss_register_driver(&n8x0_panel_driver);
+ if (r) {
+ pr_err("n8x0_panel: dss driver registration failed\n");
+ spi_unregister_driver(&mipid_spi_driver);
+ return r;
+ }
+
+ return 0;
+}
+
+static void __exit n8x0_panel_drv_exit(void)
+{
+ spi_unregister_driver(&mipid_spi_driver);
+
+ omap_dss_unregister_driver(&n8x0_panel_driver);
+}
+
+module_init(n8x0_panel_drv_init);
+module_exit(n8x0_panel_drv_exit);
+MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff