lcd: add support for Toppoly TDO24M series LCD panels
authorEric Miao <eric.miao@marvell.com>
Sun, 31 Aug 2008 22:50:23 +0000 (06:50 +0800)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Tue, 23 Sep 2008 21:04:31 +0000 (22:04 +0100)
This type of LCD panel can be found on PXA3xx/Littleton platforms.
Add LCD device and SPI-based driver for this.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
drivers/video/backlight/Kconfig
drivers/video/backlight/Makefile
drivers/video/backlight/tdo24m.c [new file with mode: 0644]

index f5406cd78e28b6ec1a9cf5aa057cc5b6e98bb39c..c72a13562954d2d404bea84f810fc1d1a590dd4d 100644 (file)
@@ -51,6 +51,14 @@ config LCD_ILI9320
          If you have a panel based on the ILI9320 controller chip
          then say y to include a power driver for it.
 
+config LCD_TDO24M
+       tristate "Toppoly TDO24M 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
+         include the support for it.
+
 config LCD_VGG2432A4
        tristate "VGG2432A4 LCM device support"
        depends on BACKLIGHT_LCD_SUPPORT && LCD_CLASS_DEVICE && SPI_MASTER
index cf12d58392e0f85992778c39324cee955b65d35d..3ec551eb472ce6d46c0a446f22badd1eda586def 100644 (file)
@@ -6,6 +6,7 @@ obj-$(CONFIG_LCD_LTV350QV)         += ltv350qv.o
 obj-$(CONFIG_LCD_ILI9320)         += ili9320.o
 obj-$(CONFIG_LCD_PLATFORM)        += platform_lcd.o
 obj-$(CONFIG_LCD_VGG2432A4)       += vgg2432a4.o
+obj-$(CONFIG_LCD_TDO24M)          += tdo24m.o
 
 obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
 obj-$(CONFIG_BACKLIGHT_ATMEL_PWM)    += atmel-pwm-bl.o
diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c
new file mode 100644 (file)
index 0000000..8427669
--- /dev/null
@@ -0,0 +1,396 @@
+/*
+ * tdo24m - SPI-based drivers for Toppoly TDO24M series LCD panels
+ *
+ * Copyright (C) 2008 Marvell International Ltd.
+ *     Eric Miao <eric.miao@marvell.com>
+ *
+ *  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
+ *  publishhed by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/spi/spi.h>
+#include <linux/fb.h>
+#include <linux/lcd.h>
+
+#define POWER_IS_ON(pwr)       ((pwr) <= FB_BLANK_NORMAL)
+
+#define TDO24M_SPI_BUFF_SIZE   (4)
+#define MODE_QVGA      0
+#define MODE_VGA       1
+
+struct tdo24m {
+       struct spi_device       *spi_dev;
+       struct lcd_device       *lcd_dev;
+
+       struct spi_message      msg;
+       struct spi_transfer     xfer;
+       uint8_t                 *buf;
+
+       int                     power;
+       int                     mode;
+};
+
+/* use bit 30, 31 as the indicator of command parameter number */
+#define CMD0(x)                ((0 << 30) | (x))
+#define CMD1(x, x1)    ((1 << 30) | ((x) << 9) | 0x100 | (x1))
+#define CMD2(x, x1, x2)        ((2 << 30) | ((x) << 18) | 0x20000 |\
+                       ((x1) << 9) | 0x100 | (x2))
+#define CMD_NULL       (-1)
+
+static uint32_t lcd_panel_reset[] = {
+       CMD0(0x1), /* reset */
+       CMD0(0x0), /* nop */
+       CMD0(0x0), /* nop */
+       CMD0(0x0), /* nop */
+       CMD_NULL,
+};
+
+static uint32_t lcd_panel_on[] = {
+       CMD0(0x29),             /* Display ON */
+       CMD2(0xB8, 0xFF, 0xF9), /* Output Control */
+       CMD0(0x11),             /* Sleep out */
+       CMD1(0xB0, 0x16),       /* Wake */
+       CMD_NULL,
+};
+
+static uint32_t lcd_panel_off[] = {
+       CMD0(0x28),             /* Display OFF */
+       CMD2(0xB8, 0x80, 0x02), /* Output Control */
+       CMD0(0x10),             /* Sleep in */
+       CMD1(0xB0, 0x00),       /* Deep stand by in */
+       CMD_NULL,
+};
+
+static uint32_t lcd_vga_pass_through[] = {
+       CMD1(0xB0, 0x16),
+       CMD1(0xBC, 0x80),
+       CMD1(0xE1, 0x00),
+       CMD1(0x36, 0x50),
+       CMD1(0x3B, 0x00),
+       CMD_NULL,
+};
+
+static uint32_t lcd_qvga_pass_through[] = {
+       CMD1(0xB0, 0x16),
+       CMD1(0xBC, 0x81),
+       CMD1(0xE1, 0x00),
+       CMD1(0x36, 0x50),
+       CMD1(0x3B, 0x22),
+       CMD_NULL,
+};
+
+static uint32_t lcd_vga_transfer[] = {
+       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, 0x14, 0x00), /* CKV 1,2 timing control */
+       CMD2(0xd3, 0x1a, 0x0f), /* OEV timing control */
+       CMD2(0xd4, 0x1f, 0xaf), /* ASW timing control (1) */
+       CMD1(0xd5, 0x14),       /* ASW timing control (2) */
+       CMD0(0x21),             /* Invert for normally black display */
+       CMD0(0x29),             /* Display on */
+       CMD_NULL,
+};
+
+static uint32_t lcd_qvga_transfer[] = {
+       CMD1(0xd6, 0x02),       /* Blanking period control (1) */
+       CMD2(0xd7, 0x08, 0x04), /* Blanking period control (2) */
+       CMD1(0xd8, 0x01),       /* CKV timing control on/off */
+       CMD2(0xd9, 0x00, 0x08), /* CKV 1,2 timing control */
+       CMD2(0xde, 0x05, 0x0a), /* OEV timing control */
+       CMD2(0xdf, 0x0a, 0x19), /* ASW timing control (1) */
+       CMD1(0xe0, 0x0a),       /* 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 */
+       CMD1(0xba, 0x01),       /* Display mode (1) */
+       CMD1(0xbb, 0x00),       /* Display mode (2) */
+       CMD1(0x3a, 0x60),       /* Display mode 18-bit RGB */
+       CMD1(0xbf, 0x10),       /* Drive system change control */
+       CMD1(0xb1, 0x56),       /* Booster operation setup */
+       CMD1(0xb2, 0x33),       /* Booster mode setup */
+       CMD1(0xb3, 0x11),       /* Booster frequency setup */
+       CMD1(0xb4, 0x02),       /* Op amp/system clock */
+       CMD1(0xb5, 0x35),       /* VCS voltage */
+       CMD1(0xb6, 0x40),       /* VCOM voltage */
+       CMD1(0xb7, 0x03),       /* External display signal */
+       CMD1(0xbd, 0x00),       /* ASW slew rate */
+       CMD1(0xbe, 0x00),       /* Dummy data for QuadData operation */
+       CMD1(0xc0, 0x11),       /* Sleep out FR count (A) */
+       CMD1(0xc1, 0x11),       /* Sleep out FR count (B) */
+       CMD1(0xc2, 0x11),       /* Sleep out FR count (C) */
+       CMD2(0xc3, 0x20, 0x40), /* Sleep out FR count (D) */
+       CMD2(0xc4, 0x60, 0xc0), /* Sleep out FR count (E) */
+       CMD2(0xc5, 0x10, 0x20), /* Sleep out FR count (F) */
+       CMD1(0xc6, 0xc0),       /* Sleep out FR count (G) */
+       CMD2(0xc7, 0x33, 0x43), /* Gamma 1 fine tuning (1) */
+       CMD1(0xc8, 0x44),       /* Gamma 1 fine tuning (2) */
+       CMD1(0xc9, 0x33),       /* Gamma 1 inclination adjustment */
+       CMD1(0xca, 0x00),       /* Gamma 1 blue offset adjustment */
+       CMD2(0xec, 0x01, 0xf0), /* Horizontal clock cycles */
+       CMD_NULL,
+};
+
+static int tdo24m_writes(struct tdo24m *lcd, uint32_t *array)
+{
+       struct spi_transfer *x = &lcd->xfer;
+       uint32_t data, *p = array;
+       int nparams, err = 0;
+
+       for (; *p != CMD_NULL; p++) {
+
+               nparams = (*p >> 30) & 0x3;
+
+               data = *p << (7 - nparams);
+               switch (nparams) {
+               case 0:
+                       lcd->buf[0] = (data >> 8) & 0xff;
+                       lcd->buf[1] = data & 0xff;
+                       break;
+               case 1:
+                       lcd->buf[0] = (data >> 16) & 0xff;
+                       lcd->buf[1] = (data >> 8) & 0xff;
+                       lcd->buf[2] = data & 0xff;
+                       break;
+               case 2:
+                       lcd->buf[0] = (data >> 24) & 0xff;
+                       lcd->buf[1] = (data >> 16) & 0xff;
+                       lcd->buf[2] = (data >> 8) & 0xff;
+                       lcd->buf[3] = data & 0xff;
+                       break;
+               default:
+                       continue;
+               }
+               x->len = nparams + 2;
+               err = spi_sync(lcd->spi_dev, &lcd->msg);
+               if (err)
+                       break;
+       }
+
+       return err;
+}
+
+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_panel_config);
+               tdo24m_writes(lcd, lcd_vga_transfer);
+               break;
+       case MODE_QVGA:
+               tdo24m_writes(lcd, lcd_qvga_pass_through);
+               tdo24m_writes(lcd, lcd_panel_config);
+               tdo24m_writes(lcd, lcd_qvga_transfer);
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       lcd->mode = mode;
+       return 0;
+}
+
+static int tdo24m_power_on(struct tdo24m *lcd)
+{
+       int err;
+
+       err = tdo24m_writes(lcd, lcd_panel_on);
+       if (err)
+               goto out;
+
+       err = tdo24m_writes(lcd, lcd_panel_reset);
+       if (err)
+               goto out;
+
+       err = tdo24m_adj_mode(lcd, lcd->mode);
+out:
+       return err;
+}
+
+static int tdo24m_power_off(struct tdo24m *lcd)
+{
+       return tdo24m_writes(lcd, lcd_panel_off);
+}
+
+static int tdo24m_power(struct tdo24m *lcd, int power)
+{
+       int ret = 0;
+
+       if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
+               ret = tdo24m_power_on(lcd);
+       else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
+               ret = tdo24m_power_off(lcd);
+
+       if (!ret)
+               lcd->power = power;
+
+       return ret;
+}
+
+
+static int tdo24m_set_power(struct lcd_device *ld, int power)
+{
+       struct tdo24m *lcd = lcd_get_data(ld);
+       return tdo24m_power(lcd, power);
+}
+
+static int tdo24m_get_power(struct lcd_device *ld)
+{
+       struct tdo24m *lcd = lcd_get_data(ld);
+       return lcd->power;
+}
+
+static int tdo24m_set_mode(struct lcd_device *ld, struct fb_videomode *m)
+{
+       struct tdo24m *lcd = lcd_get_data(ld);
+       int mode = MODE_QVGA;
+
+       if (m->xres == 640 || m->xres == 480)
+               mode = MODE_VGA;
+
+       if (lcd->mode == mode)
+               return 0;
+
+       return tdo24m_adj_mode(lcd, mode);
+}
+
+static struct lcd_ops tdo24m_ops = {
+       .get_power      = tdo24m_get_power,
+       .set_power      = tdo24m_set_power,
+       .set_mode       = tdo24m_set_mode,
+};
+
+static int __devinit tdo24m_probe(struct spi_device *spi)
+{
+       struct tdo24m *lcd;
+       struct spi_message *m;
+       struct spi_transfer *x;
+       int err;
+
+       spi->bits_per_word = 8;
+       spi->mode = SPI_MODE_3;
+       err = spi_setup(spi);
+       if (err)
+               return err;
+
+       lcd = kzalloc(sizeof(struct tdo24m), GFP_KERNEL);
+       if (!lcd)
+               return -ENOMEM;
+
+       lcd->spi_dev = spi;
+       lcd->power = FB_BLANK_POWERDOWN;
+       lcd->mode = MODE_VGA;   /* default to VGA */
+
+       lcd->buf = kmalloc(TDO24M_SPI_BUFF_SIZE, sizeof(GFP_KERNEL));
+       if (lcd->buf == NULL) {
+               kfree(lcd);
+               return -ENOMEM;
+       }
+
+       m = &lcd->msg;
+       x = &lcd->xfer;
+
+       spi_message_init(m);
+
+       x->tx_buf = &lcd->buf[0];
+       spi_message_add_tail(x, m);
+
+       lcd->lcd_dev = lcd_device_register("tdo24m", &spi->dev,
+                                       lcd, &tdo24m_ops);
+       if (IS_ERR(lcd->lcd_dev)) {
+               err = PTR_ERR(lcd->lcd_dev);
+               goto out_free;
+       }
+
+       dev_set_drvdata(&spi->dev, lcd);
+       err = tdo24m_power(lcd, FB_BLANK_UNBLANK);
+       if (err)
+               goto out_unregister;
+
+       return 0;
+
+out_unregister:
+       lcd_device_unregister(lcd->lcd_dev);
+out_free:
+       kfree(lcd->buf);
+       kfree(lcd);
+       return err;
+}
+
+static int __devexit tdo24m_remove(struct spi_device *spi)
+{
+       struct tdo24m *lcd = dev_get_drvdata(&spi->dev);
+
+       tdo24m_power(lcd, FB_BLANK_POWERDOWN);
+       lcd_device_unregister(lcd->lcd_dev);
+       kfree(lcd->buf);
+       kfree(lcd);
+
+       return 0;
+}
+
+#ifdef CONFIG_PM
+static int tdo24m_suspend(struct spi_device *spi, pm_message_t state)
+{
+       struct tdo24m *lcd = dev_get_drvdata(&spi->dev);
+
+       return tdo24m_power(lcd, FB_BLANK_POWERDOWN);
+}
+
+static int tdo24m_resume(struct spi_device *spi)
+{
+       struct tdo24m *lcd = dev_get_drvdata(&spi->dev);
+
+       return tdo24m_power(lcd, FB_BLANK_UNBLANK);
+}
+#else
+#define tdo24m_suspend NULL
+#define tdo24m_resume  NULL
+#endif
+
+/* Power down all displays on reboot, poweroff or halt */
+static void tdo24m_shutdown(struct spi_device *spi)
+{
+       struct tdo24m *lcd = dev_get_drvdata(&spi->dev);
+
+       tdo24m_power(lcd, FB_BLANK_POWERDOWN);
+}
+
+static struct spi_driver tdo24m_driver = {
+       .driver = {
+               .name           = "tdo24m",
+               .owner          = THIS_MODULE,
+       },
+       .probe          = tdo24m_probe,
+       .remove         = __devexit_p(tdo24m_remove),
+       .shutdown       = tdo24m_shutdown,
+       .suspend        = tdo24m_suspend,
+       .resume         = tdo24m_resume,
+};
+
+static int __init tdo24m_init(void)
+{
+       return spi_register_driver(&tdo24m_driver);
+}
+module_init(tdo24m_init);
+
+static void __exit tdo24m_exit(void)
+{
+       spi_unregister_driver(&tdo24m_driver);
+}
+module_exit(tdo24m_exit);
+
+MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
+MODULE_DESCRIPTION("Driver for Toppoly TDO24M LCD Panel");
+MODULE_LICENSE("GPL");