backlight: add support for Toppoly TDO35S series to tdo24m lcd driver

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

3 files changed, 101 insertions, 10 deletions

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 4a4dd9adc328..7ee2313ed6b8 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -52,11 +52,11 @@ config LCD_ILI9320
           then say y to include a power driver for it.
 
 config LCD_TDO24M
-        tristate "Toppoly TDO24M LCD Panels support"
+        tristate "Toppoly TDO24M  and TDO35S LCD Panels support"
         depends on LCD_CLASS_DEVICE && SPI_MASTER
         default n
         help
-          If you have a Toppoly TDO24M series LCD panel, say y here to
+          If you have a Toppoly TDO24M/TDO35S series LCD panel, say y here to
           include the support for it.
 
 config LCD_VGG2432A4
diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c
index 8427669162ea..1dae7f8f3c6b 100644
--- a/drivers/video/backlight/tdo24m.c
+++ b/drivers/video/backlight/tdo24m.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/spi/spi.h>
+#include <linux/spi/tdo24m.h>
 #include <linux/fb.h>
 #include <linux/lcd.h>
 
@@ -31,6 +32,9 @@ struct tdo24m {
         struct spi_transfer     xfer;
         uint8_t                 *buf;
 
+        int (*adj_mode)(struct tdo24m *lcd, int mode);
+        int color_invert;
+
         int                     power;
         int                     mode;
 };
@@ -66,7 +70,7 @@ static uint32_t lcd_panel_off[] = {
         CMD_NULL,
 };
 
-static uint32_t lcd_vga_pass_through[] = {
+static uint32_t lcd_vga_pass_through_tdo24m[] = {
         CMD1(0xB0, 0x16),
         CMD1(0xBC, 0x80),
         CMD1(0xE1, 0x00),
@@ -75,7 +79,7 @@ static uint32_t lcd_vga_pass_through[] = {
         CMD_NULL,
 };
 
-static uint32_t lcd_qvga_pass_through[] = {
+static uint32_t lcd_qvga_pass_through_tdo24m[] = {
         CMD1(0xB0, 0x16),
         CMD1(0xBC, 0x81),
         CMD1(0xE1, 0x00),
@@ -84,7 +88,7 @@ static uint32_t lcd_qvga_pass_through[] = {
         CMD_NULL,
 };
 
-static uint32_t lcd_vga_transfer[] = {
+static uint32_t lcd_vga_transfer_tdo24m[] = {
         CMD1(0xcf, 0x02),       /* Blanking period control (1) */
         CMD2(0xd0, 0x08, 0x04), /* Blanking period control (2) */
         CMD1(0xd1, 0x01),       /* CKV timing control on/off */
@@ -110,6 +114,35 @@ static uint32_t lcd_qvga_transfer[] = {
         CMD_NULL,
 };
 
+static uint32_t lcd_vga_pass_through_tdo35s[] = {
+        CMD1(0xB0, 0x16),
+        CMD1(0xBC, 0x80),
+        CMD1(0xE1, 0x00),
+        CMD1(0x3B, 0x00),
+        CMD_NULL,
+};
+
+static uint32_t lcd_qvga_pass_through_tdo35s[] = {
+        CMD1(0xB0, 0x16),
+        CMD1(0xBC, 0x81),
+        CMD1(0xE1, 0x00),
+        CMD1(0x3B, 0x22),
+        CMD_NULL,
+};
+
+static uint32_t lcd_vga_transfer_tdo35s[] = {
+        CMD1(0xcf, 0x02),       /* Blanking period control (1) */
+        CMD2(0xd0, 0x08, 0x04), /* Blanking period control (2) */
+        CMD1(0xd1, 0x01),       /* CKV timing control on/off */
+        CMD2(0xd2, 0x00, 0x1e), /* CKV 1,2 timing control */
+        CMD2(0xd3, 0x14, 0x28), /* OEV timing control */
+        CMD2(0xd4, 0x28, 0x64), /* ASW timing control (1) */
+        CMD1(0xd5, 0x28),       /* ASW timing control (2) */
+        CMD0(0x21),             /* Invert for normally black display */
+        CMD0(0x29),             /* Display on */
+        CMD_NULL,
+};
+
 static uint32_t lcd_panel_config[] = {
         CMD2(0xb8, 0xff, 0xf9), /* Output control */
         CMD0(0x11),             /* sleep out */
@@ -148,6 +181,8 @@ static int tdo24m_writes(struct tdo24m *lcd, uint32_t *array)
         int nparams, err = 0;
 
         for (; *p != CMD_NULL; p++) {
+                if (!lcd->color_invert && *p == CMD0(0x21))
+                        continue;
 
                 nparams = (*p >> 30) & 0x3;
 
@@ -184,12 +219,33 @@ static int tdo24m_adj_mode(struct tdo24m *lcd, int mode)
 {
         switch (mode) {
         case MODE_VGA:
-                tdo24m_writes(lcd, lcd_vga_pass_through);
+                tdo24m_writes(lcd, lcd_vga_pass_through_tdo24m);
                 tdo24m_writes(lcd, lcd_panel_config);
-                tdo24m_writes(lcd, lcd_vga_transfer);
+                tdo24m_writes(lcd, lcd_vga_transfer_tdo24m);
                 break;
         case MODE_QVGA:
-                tdo24m_writes(lcd, lcd_qvga_pass_through);
+                tdo24m_writes(lcd, lcd_qvga_pass_through_tdo24m);
+                tdo24m_writes(lcd, lcd_panel_config);
+                tdo24m_writes(lcd, lcd_qvga_transfer);
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        lcd->mode = mode;
+        return 0;
+}
+
+static int tdo35s_adj_mode(struct tdo24m *lcd, int mode)
+{
+        switch (mode) {
+        case MODE_VGA:
+                tdo24m_writes(lcd, lcd_vga_pass_through_tdo35s);
+                tdo24m_writes(lcd, lcd_panel_config);
+                tdo24m_writes(lcd, lcd_vga_transfer_tdo35s);
+                break;
+        case MODE_QVGA:
+                tdo24m_writes(lcd, lcd_qvga_pass_through_tdo35s);
                 tdo24m_writes(lcd, lcd_panel_config);
                 tdo24m_writes(lcd, lcd_qvga_transfer);
                 break;
@@ -213,7 +269,7 @@ static int tdo24m_power_on(struct tdo24m *lcd)
         if (err)
                 goto out;
 
-        err = tdo24m_adj_mode(lcd, lcd->mode);
+        err = lcd->adj_mode(lcd, lcd->mode);
 out:
         return err;
 }
@@ -262,7 +318,7 @@ static int tdo24m_set_mode(struct lcd_device *ld, struct fb_videomode *m)
         if (lcd->mode == mode)
                 return 0;
 
-        return tdo24m_adj_mode(lcd, mode);
+        return lcd->adj_mode(lcd, mode);
 }
 
 static struct lcd_ops tdo24m_ops = {
@@ -276,8 +332,16 @@ static int __devinit tdo24m_probe(struct spi_device *spi)
         struct tdo24m *lcd;
         struct spi_message *m;
         struct spi_transfer *x;
+        struct tdo24m_platform_data *pdata;
+        enum tdo24m_model model;
         int err;
 
+        pdata = spi->dev.platform_data;
+        if (pdata)
+                model = pdata->model;
+        else
+                model = TDO24M;
+
         spi->bits_per_word = 8;
         spi->mode = SPI_MODE_3;
         err = spi_setup(spi);
@@ -306,6 +370,20 @@ static int __devinit tdo24m_probe(struct spi_device *spi)
         x->tx_buf = &lcd->buf[0];
         spi_message_add_tail(x, m);
 
+        switch (model) {
+        case TDO24M:
+                lcd->color_invert = 1;
+                lcd->adj_mode = tdo24m_adj_mode;
+                break;
+        case TDO35S:
+                lcd->adj_mode = tdo35s_adj_mode;
+                lcd->color_invert = 0;
+                break;
+        default:
+                dev_err(&spi->dev, "Unsupported model");
+                goto out_free;
+        }
+
         lcd->lcd_dev = lcd_device_register("tdo24m", &spi->dev,
                                         lcd, &tdo24m_ops);
         if (IS_ERR(lcd->lcd_dev)) {
diff --git a/include/linux/spi/tdo24m.h b/include/linux/spi/tdo24m.h
new file mode 100644
index 000000000000..7572d4e1fe76
--- /dev/null
+++ b/include/linux/spi/tdo24m.h
@@ -0,0 +1,13 @@
+#ifndef __TDO24M_H__
+#define __TDO24M_H__
+
+enum tdo24m_model {
+        TDO24M,
+        TDO35S,
+};
+
+struct tdo24m_platform_data {
+        enum tdo24m_model model;
+};
+
+#endif /* __TDO24M_H__ */