diff options
Diffstat (limited to 'arch/sh/boards/mach-migor/lcd_qvga.c')
| -rw-r--r-- | arch/sh/boards/mach-migor/lcd_qvga.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-migor/lcd_qvga.c b/arch/sh/boards/mach-migor/lcd_qvga.c new file mode 100644 index 00000000000..6e960959644 --- /dev/null +++ b/arch/sh/boards/mach-migor/lcd_qvga.c @@ -0,0 +1,165 @@ +/* + * Support for SuperH MigoR Quarter VGA LCD Panel + * + * Copyright (C) 2008 Magnus Damm + * + * Based on lcd_powertip.c from Kenati Technologies Pvt Ltd. + * Copyright (c) 2007 Ujjwal Pande <ujjwal@kenati.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 + * published by the Free Software Foundation. + */ + +#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 <asm/sh_mobile_lcdc.h> +#include <asm/migor.h> + +/* LCD Module is a PH240320T according to board schematics. This module + * is made up of a 240x320 LCD hooked up to a R61505U (or HX8347-A01?) + * Driver IC. This IC is connected to the SH7722 built-in LCDC using a + * SYS-80 interface configured in 16 bit mode. + * + * Index 0: "Device Code Read" returns 0x1505. + */ + +static void reset_lcd_module(void) +{ + ctrl_outb(ctrl_inb(PORT_PHDR) & ~0x04, PORT_PHDR); + mdelay(2); + ctrl_outb(ctrl_inb(PORT_PHDR) | 0x04, PORT_PHDR); + mdelay(1); +} + +/* DB0-DB7 are connected to D1-D8, and DB8-DB15 to D10-D17 */ + +static unsigned long adjust_reg18(unsigned short data) +{ + unsigned long tmp1, tmp2; + + tmp1 = (data<<1 | 0x00000001) & 0x000001FF; + tmp2 = (data<<2 | 0x00000200) & 0x0003FE00; + return tmp1 | tmp2; +} + +static void write_reg(void *sys_ops_handle, + struct sh_mobile_lcdc_sys_bus_ops *sys_ops, + unsigned short reg, unsigned short data) +{ + sys_ops->write_index(sys_ops_handle, adjust_reg18(reg << 8 | data)); +} + +static void write_reg16(void *sys_ops_handle, + struct sh_mobile_lcdc_sys_bus_ops *sys_ops, + unsigned short reg, unsigned short data) +{ + sys_ops->write_index(sys_ops_handle, adjust_reg18(reg)); + sys_ops->write_data(sys_ops_handle, adjust_reg18(data)); +} + +static unsigned long read_reg16(void *sys_ops_handle, + struct sh_mobile_lcdc_sys_bus_ops *sys_ops, + unsigned short reg) +{ + unsigned long data; + + sys_ops->write_index(sys_ops_handle, adjust_reg18(reg)); + data = sys_ops->read_data(sys_ops_handle); + return ((data >> 1) & 0xff) | ((data >> 2) & 0xff00); +} + +static void migor_lcd_qvga_seq(void *sys_ops_handle, + struct sh_mobile_lcdc_sys_bus_ops *sys_ops, + unsigned short const *data, int no_data) +{ + int i; + + for (i = 0; i < no_data; i += 2) + write_reg16(sys_ops_handle, sys_ops, data[i], data[i + 1]); +} + +static const unsigned short sync_data[] = { + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, +}; + +static const unsigned short magic0_data[] = { + 0x0060, 0x2700, 0x0008, 0x0808, 0x0090, 0x001A, 0x0007, 0x0001, + 0x0017, 0x0001, 0x0019, 0x0000, 0x0010, 0x17B0, 0x0011, 0x0116, + 0x0012, 0x0198, 0x0013, 0x1400, 0x0029, 0x000C, 0x0012, 0x01B8, +}; + +static const unsigned short magic1_data[] = { + 0x0030, 0x0307, 0x0031, 0x0303, 0x0032, 0x0603, 0x0033, 0x0202, + 0x0034, 0x0202, 0x0035, 0x0202, 0x0036, 0x1F1F, 0x0037, 0x0303, + 0x0038, 0x0303, 0x0039, 0x0603, 0x003A, 0x0202, 0x003B, 0x0102, + 0x003C, 0x0204, 0x003D, 0x0000, 0x0001, 0x0100, 0x0002, 0x0300, + 0x0003, 0x5028, 0x0020, 0x00ef, 0x0021, 0x0000, 0x0004, 0x0000, + 0x0009, 0x0000, 0x000A, 0x0008, 0x000C, 0x0000, 0x000D, 0x0000, + 0x0015, 0x8000, +}; + +static const unsigned short magic2_data[] = { + 0x0061, 0x0001, 0x0092, 0x0100, 0x0093, 0x0001, 0x0007, 0x0021, +}; + +static const unsigned short magic3_data[] = { + 0x0010, 0x16B0, 0x0011, 0x0111, 0x0007, 0x0061, +}; + +int migor_lcd_qvga_setup(void *board_data, void *sohandle, + struct sh_mobile_lcdc_sys_bus_ops *so) +{ + unsigned long xres = 320; + unsigned long yres = 240; + int k; + + reset_lcd_module(); + migor_lcd_qvga_seq(sohandle, so, sync_data, ARRAY_SIZE(sync_data)); + + if (read_reg16(sohandle, so, 0) != 0x1505) + return -ENODEV; + + pr_info("Migo-R QVGA LCD Module detected.\n"); + + migor_lcd_qvga_seq(sohandle, so, sync_data, ARRAY_SIZE(sync_data)); + write_reg16(sohandle, so, 0x00A4, 0x0001); + mdelay(10); + + migor_lcd_qvga_seq(sohandle, so, magic0_data, ARRAY_SIZE(magic0_data)); + mdelay(100); + + migor_lcd_qvga_seq(sohandle, so, magic1_data, ARRAY_SIZE(magic1_data)); + write_reg16(sohandle, so, 0x0050, 0xef - (yres - 1)); + write_reg16(sohandle, so, 0x0051, 0x00ef); + write_reg16(sohandle, so, 0x0052, 0x0000); + write_reg16(sohandle, so, 0x0053, xres - 1); + + migor_lcd_qvga_seq(sohandle, so, magic2_data, ARRAY_SIZE(magic2_data)); + mdelay(10); + + migor_lcd_qvga_seq(sohandle, so, magic3_data, ARRAY_SIZE(magic3_data)); + mdelay(40); + + /* clear GRAM to avoid displaying garbage */ + + write_reg16(sohandle, so, 0x0020, 0x0000); /* horiz addr */ + write_reg16(sohandle, so, 0x0021, 0x0000); /* vert addr */ + + for (k = 0; k < (xres * 256); k++) /* yes, 256 words per line */ + write_reg16(sohandle, so, 0x0022, 0x0000); + + write_reg16(sohandle, so, 0x0020, 0x0000); /* reset horiz addr */ + write_reg16(sohandle, so, 0x0021, 0x0000); /* reset vert addr */ + write_reg16(sohandle, so, 0x0007, 0x0173); + mdelay(40); + + /* enable display */ + write_reg(sohandle, so, 0x00, 0x22); + mdelay(100); + return 0; +} |