diff options
author | Paul Mundt <lethal@linux-sh.org> | 2008-07-29 16:01:19 +0400 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-07-29 16:01:19 +0400 |
commit | da2014a2b080e7f3024a4eb6917d47069ad9620b (patch) | |
tree | cfde12c6d4b5baa222966b14a676f107992cf786 /arch/sh/boards/mach-migor/lcd_qvga.c | |
parent | 71b8064e7df5698520d73b4c1566a3dbc98eb9ef (diff) | |
download | linux-da2014a2b080e7f3024a4eb6917d47069ad9620b.tar.xz |
sh: Shuffle the board directories in to mach groups.
This flattens out the board directories in to individual mach groups,
we will use this for getting rid of unneeded directories, simplifying
the build system, and becoming more coherent with the refactored
arch/sh/include topology.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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 000000000000..6e9609596448 --- /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; +} |