sh: kfr2r09 board support - LCDC panel

This patch adds support for the WQVGA LCD display used by
the KFR2R09 board. The LCD module is a TX07D34VM0AAA made
by Hitachi, and this module is made up by a R61517 chip
together with a 240x400 pixel display. The screen is
attached to the SuperH Mobile LCDC using a 18-bit SYS bus.

The register settings used by the SYS panel setup code are
based on an out-of-tree driver which apart from duplicating
all LCDC driver code and writing to non-existing hardware
registers also never was posted for upstream merge.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 332 insertions, 0 deletions

diff --git a/arch/sh/boards/mach-kfr2r09/lcd_wqvga.c b/arch/sh/boards/mach-kfr2r09/lcd_wqvga.c
new file mode 100644
index 000000000000..8ccb1cc8b589
--- /dev/null
+++ b/arch/sh/boards/mach-kfr2r09/lcd_wqvga.c
@@ -0,0 +1,332 @@
+/*
+ * KFR2R09 LCD panel support
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * Register settings based on the out-of-tree t33fb.c driver
+ * Copyright (C) 2008 Lineo Solutions, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <video/sh_mobile_lcdc.h>
+#include <mach/kfr2r09.h>
+#include <cpu/sh7724.h>
+
+/* The on-board LCD module is a Hitachi TX07D34VM0AAA. This module is made
+ * up of a 240x400 LCD hooked up to a R61517 driver IC. The driver IC is
+ * communicating with the main port of the LCDC using an 18-bit SYS interface.
+ *
+ * The device code for this LCD module is 0x01221517.
+ */
+
+static const unsigned char data_frame_if[] = {
+        0x02, /* WEMODE: 1=cont, 0=one-shot */
+        0x00, 0x00,
+        0x00, /* EPF, DFM */
+        0x02, /* RIM[1] : 1 (18bpp) */
+};
+
+static const unsigned char data_panel[] = {
+        0x0b,
+        0x63, /* 400 lines */
+        0x04, 0x00, 0x00, 0x04, 0x11, 0x00, 0x00,
+};
+
+static const unsigned char data_timing[] = {
+        0x00, 0x00, 0x13, 0x08, 0x08,
+};
+
+static const unsigned char data_timing_src[] = {
+        0x11, 0x01, 0x00, 0x01,
+};
+
+static const unsigned char data_gamma[] = {
+        0x01, 0x02, 0x08, 0x23, 0x03, 0x0c, 0x00, 0x06, 0x00, 0x00,
+        0x01, 0x00, 0x0c, 0x23, 0x03, 0x08, 0x02, 0x06, 0x00, 0x00,
+};
+
+static const unsigned char data_power[] = {
+        0x07, 0xc5, 0xdc, 0x02, 0x33, 0x0a,
+};
+
+static unsigned long read_reg(void *sohandle,
+                              struct sh_mobile_lcdc_sys_bus_ops *so)
+{
+        return so->read_data(sohandle);
+}
+
+static void write_reg(void *sohandle,
+                      struct sh_mobile_lcdc_sys_bus_ops *so,
+                      int i, unsigned long v)
+{
+        if (i)
+                so->write_data(sohandle, v); /* PTH4/LCDRS High [param, 17:0] */
+        else
+                so->write_index(sohandle, v); /* PTH4/LCDRS Low [cmd, 7:0] */
+}
+
+static void write_data(void *sohandle,
+                       struct sh_mobile_lcdc_sys_bus_ops *so,
+                       unsigned char const *data, int no_data)
+{
+        int i;
+
+        for (i = 0; i < no_data; i++)
+                write_reg(sohandle, so, 1, data[i]);
+}
+
+static unsigned long read_device_code(void *sohandle,
+                                      struct sh_mobile_lcdc_sys_bus_ops *so)
+{
+        unsigned long device_code;
+
+        /* access protect OFF */
+        write_reg(sohandle, so, 0, 0xb0);
+        write_reg(sohandle, so, 1, 0x00);
+
+        /* deep standby OFF */
+        write_reg(sohandle, so, 0, 0xb1);
+        write_reg(sohandle, so, 1, 0x00);
+
+        /* device code command */
+        write_reg(sohandle, so, 0, 0xbf);
+        mdelay(50);
+
+        /* dummy read */
+        read_reg(sohandle, so);
+
+        /* read device code */
+        device_code = ((read_reg(sohandle, so) & 0xff) << 24);
+        device_code |= ((read_reg(sohandle, so) & 0xff) << 16);
+        device_code |= ((read_reg(sohandle, so) & 0xff) << 8);
+        device_code |= (read_reg(sohandle, so) & 0xff);
+
+        return device_code;
+}
+
+static void write_memory_start(void *sohandle,
+                               struct sh_mobile_lcdc_sys_bus_ops *so)
+{
+        write_reg(sohandle, so, 0, 0x2c);
+}
+
+static void clear_memory(void *sohandle,
+                         struct sh_mobile_lcdc_sys_bus_ops *so)
+{
+        int i;
+
+        /* write start */
+        write_memory_start(sohandle, so);
+
+        /* paint it black */
+        for (i = 0; i < (240 * 400); i++)
+                write_reg(sohandle, so, 1, 0x00);
+}
+
+static void display_on(void *sohandle,
+                       struct sh_mobile_lcdc_sys_bus_ops *so)
+{
+        /* access protect off */
+        write_reg(sohandle, so, 0, 0xb0);
+        write_reg(sohandle, so, 1, 0x00);
+
+        /* exit deep standby mode */
+        write_reg(sohandle, so, 0, 0xb1);
+        write_reg(sohandle, so, 1, 0x00);
+
+        /* frame memory I/F */
+        write_reg(sohandle, so, 0, 0xb3);
+        write_data(sohandle, so, data_frame_if, ARRAY_SIZE(data_frame_if));
+
+        /* display mode and frame memory write mode */
+        write_reg(sohandle, so, 0, 0xb4);
+        write_reg(sohandle, so, 1, 0x00); /* DBI, internal clock */
+
+        /* panel */
+        write_reg(sohandle, so, 0, 0xc0);
+        write_data(sohandle, so, data_panel, ARRAY_SIZE(data_panel));
+
+        /* timing (normal) */
+        write_reg(sohandle, so, 0, 0xc1);
+        write_data(sohandle, so, data_timing, ARRAY_SIZE(data_timing));
+
+        /* timing (partial) */
+        write_reg(sohandle, so, 0, 0xc2);
+        write_data(sohandle, so, data_timing, ARRAY_SIZE(data_timing));
+
+        /* timing (idle) */
+        write_reg(sohandle, so, 0, 0xc3);
+        write_data(sohandle, so, data_timing, ARRAY_SIZE(data_timing));
+
+        /* timing (source/VCOM/gate driving) */
+        write_reg(sohandle, so, 0, 0xc4);
+        write_data(sohandle, so, data_timing_src, ARRAY_SIZE(data_timing_src));
+
+        /* gamma (red) */
+        write_reg(sohandle, so, 0, 0xc8);
+        write_data(sohandle, so, data_gamma, ARRAY_SIZE(data_gamma));
+
+        /* gamma (green) */
+        write_reg(sohandle, so, 0, 0xc9);
+        write_data(sohandle, so, data_gamma, ARRAY_SIZE(data_gamma));
+
+        /* gamma (blue) */
+        write_reg(sohandle, so, 0, 0xca);
+        write_data(sohandle, so, data_gamma, ARRAY_SIZE(data_gamma));
+
+        /* power (common) */
+        write_reg(sohandle, so, 0, 0xd0);
+        write_data(sohandle, so, data_power, ARRAY_SIZE(data_power));
+
+        /* VCOM */
+        write_reg(sohandle, so, 0, 0xd1);
+        write_reg(sohandle, so, 1, 0x00);
+        write_reg(sohandle, so, 1, 0x0f);
+        write_reg(sohandle, so, 1, 0x02);
+
+        /* power (normal) */
+        write_reg(sohandle, so, 0, 0xd2);
+        write_reg(sohandle, so, 1, 0x63);
+        write_reg(sohandle, so, 1, 0x24);
+
+        /* power (partial) */
+        write_reg(sohandle, so, 0, 0xd3);
+        write_reg(sohandle, so, 1, 0x63);
+        write_reg(sohandle, so, 1, 0x24);
+
+        /* power (idle) */
+        write_reg(sohandle, so, 0, 0xd4);
+        write_reg(sohandle, so, 1, 0x63);
+        write_reg(sohandle, so, 1, 0x24);
+
+        write_reg(sohandle, so, 0, 0xd8);
+        write_reg(sohandle, so, 1, 0x77);
+        write_reg(sohandle, so, 1, 0x77);
+
+        /* TE signal */
+        write_reg(sohandle, so, 0, 0x35);
+        write_reg(sohandle, so, 1, 0x00);
+
+        /* TE signal line */
+        write_reg(sohandle, so, 0, 0x44);
+        write_reg(sohandle, so, 1, 0x00);
+        write_reg(sohandle, so, 1, 0x00);
+
+        /* column address */
+        write_reg(sohandle, so, 0, 0x2a);
+        write_reg(sohandle, so, 1, 0x00);
+        write_reg(sohandle, so, 1, 0x00);
+        write_reg(sohandle, so, 1, 0x00);
+        write_reg(sohandle, so, 1, 0xef);
+
+        /* page address */
+        write_reg(sohandle, so, 0, 0x2b);
+        write_reg(sohandle, so, 1, 0x00);
+        write_reg(sohandle, so, 1, 0x00);
+        write_reg(sohandle, so, 1, 0x01);
+        write_reg(sohandle, so, 1, 0x8f);
+
+        /* exit sleep mode */
+        write_reg(sohandle, so, 0, 0x11);
+
+        mdelay(120);
+
+        /* clear vram */
+        clear_memory(sohandle, so);
+
+        /* display ON */
+        write_reg(sohandle, so, 0, 0x29);
+        mdelay(1);
+
+        write_memory_start(sohandle, so);
+}
+
+int kfr2r09_lcd_setup(void *board_data, void *sohandle,
+                      struct sh_mobile_lcdc_sys_bus_ops *so)
+{
+        /* power on */
+        gpio_set_value(GPIO_PTF4, 0);  /* PROTECT/ -> L */
+        gpio_set_value(GPIO_PTE4, 0);  /* LCD_RST/ -> L */
+        gpio_set_value(GPIO_PTF4, 1);  /* PROTECT/ -> H */
+        udelay(1100);
+        gpio_set_value(GPIO_PTE4, 1);  /* LCD_RST/ -> H */
+        udelay(10);
+        gpio_set_value(GPIO_PTF4, 0);  /* PROTECT/ -> L */
+        mdelay(20);
+
+        if (read_device_code(sohandle, so) != 0x01221517)
+                return -ENODEV;
+
+        pr_info("KFR2R09 WQVGA LCD Module detected.\n");
+
+        display_on(sohandle, so);
+        return 0;
+}
+
+#define CTRL_CKSW       0x10
+#define CTRL_C10        0x20
+#define CTRL_CPSW       0x80
+#define MAIN_MLED4      0x40
+#define MAIN_MSW        0x80
+
+static int kfr2r09_lcd_backlight(int on)
+{
+        struct i2c_adapter *a;
+        struct i2c_msg msg;
+        unsigned char buf[2];
+        int ret;
+
+        a = i2c_get_adapter(0);
+        if (!a)
+                return -ENODEV;
+
+        buf[0] = 0x00;
+        if (on)
+                buf[1] = CTRL_CPSW | CTRL_C10 | CTRL_CKSW;
+        else
+                buf[1] = 0;
+
+        msg.addr = 0x75;
+        msg.buf = buf;
+        msg.len = 2;
+        msg.flags = 0;
+        ret = i2c_transfer(a, &msg, 1);
+        if (ret != 1)
+                return -ENODEV;
+
+        buf[0] = 0x01;
+        if (on)
+                buf[1] = MAIN_MSW | MAIN_MLED4 | 0x0c;
+        else
+                buf[1] = 0;
+
+        msg.addr = 0x75;
+        msg.buf = buf;
+        msg.len = 2;
+        msg.flags = 0;
+        ret = i2c_transfer(a, &msg, 1);
+        if (ret != 1)
+                return -ENODEV;
+
+        return 0;
+}
+
+void kfr2r09_lcd_on(void *board_data)
+{
+        kfr2r09_lcd_backlight(1);
+}
+
+void kfr2r09_lcd_off(void *board_data)
+{
+        kfr2r09_lcd_backlight(0);
+}