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/*
* linux/drivers/video/sa1100fb.c
*
* Copyright (C) 1999 Eric A. Thomas
* Based on acornfb.c Copyright (C) Russell King.
*
* 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.
*
* StrongARM 1100 LCD Controller Frame Buffer Driver
*
* Please direct your questions and comments on this driver to the following
* email address:
*
* linux-arm-kernel@lists.arm.linux.org.uk
*
* Clean patches should be sent to the ARM Linux Patch System. Please see the
* following web page for more information:
*
* http://www.arm.linux.org.uk/developer/patches/info.shtml
*
* Thank you.
*
* Known problems:
* - With the Neponset plugged into an Assabet, LCD powerdown
* doesn't work (LCD stays powered up). Therefore we shouldn't
* blank the screen.
* - We don't limit the CPU clock rate nor the mode selection
* according to the available SDRAM bandwidth.
*
* Other notes:
* - Linear grayscale palettes and the kernel.
* Such code does not belong in the kernel. The kernel frame buffer
* drivers do not expect a linear colourmap, but a colourmap based on
* the VT100 standard mapping.
*
* If your _userspace_ requires a linear colourmap, then the setup of
* such a colourmap belongs _in userspace_, not in the kernel. Code
* to set the colourmap correctly from user space has been sent to
* David Neuer. It's around 8 lines of C code, plus another 4 to
* detect if we are using grayscale.
*
* Code Status:
* 1999/04/01:
* - Driver appears to be working for Brutus 320x200x8bpp mode. Other
* resolutions are working, but only the 8bpp mode is supported.
* Changes need to be made to the palette encode and decode routines
* to support 4 and 16 bpp modes.
* Driver is not designed to be a module. The FrameBuffer is statically
* allocated since dynamic allocation of a 300k buffer cannot be
* guaranteed.
*
* 1999/06/17:
* - FrameBuffer memory is now allocated at run-time when the
* driver is initialized.
*
* 2000/04/10: Nicolas Pitre <nico@cam.org>
* - Big cleanup for dynamic selection of machine type at run time.
*
* 2000/07/19: Jamey Hicks <jamey@crl.dec.com>
* - Support for Bitsy aka Compaq iPAQ H3600 added.
*
* 2000/08/07: Tak-Shing Chan <tchan.rd@idthk.com>
* Jeff Sutherland <jsutherland@accelent.com>
* - Resolved an issue caused by a change made to the Assabet's PLD
* earlier this year which broke the framebuffer driver for newer
* Phase 4 Assabets. Some other parameters were changed to optimize
* for the Sharp display.
*
* 2000/08/09: Kunihiko IMAI <imai@vasara.co.jp>
* - XP860 support added
*
* 2000/08/19: Mark Huang <mhuang@livetoy.com>
* - Allows standard options to be passed on the kernel command line
* for most common passive displays.
*
* 2000/08/29:
* - s/save_flags_cli/local_irq_save/
* - remove unneeded extra save_flags_cli in sa1100fb_enable_lcd_controller
*
* 2000/10/10: Erik Mouw <J.A.K.Mouw@its.tudelft.nl>
* - Updated LART stuff. Fixed some minor bugs.
*
* 2000/10/30: Murphy Chen <murphy@mail.dialogue.com.tw>
* - Pangolin support added
*
* 2000/10/31: Roman Jordan <jor@hoeft-wessel.de>
* - Huw Webpanel support added
*
* 2000/11/23: Eric Peng <ericpeng@coventive.com>
* - Freebird add
*
* 2001/02/07: Jamey Hicks <jamey.hicks@compaq.com>
* Cliff Brake <cbrake@accelent.com>
* - Added PM callback
*
* 2001/05/26: <rmk@arm.linux.org.uk>
* - Fix 16bpp so that (a) we use the right colours rather than some
* totally random colour depending on what was in page 0, and (b)
* we don't de-reference a NULL pointer.
* - remove duplicated implementation of consistent_alloc()
* - convert dma address types to dma_addr_t
* - remove unused 'montype' stuff
* - remove redundant zero inits of init_var after the initial
* memzero.
* - remove allow_modeset (acornfb idea does not belong here)
*
* 2001/05/28: <rmk@arm.linux.org.uk>
* - massive cleanup - move machine dependent data into structures
* - I've left various #warnings in - if you see one, and know
* the hardware concerned, please get in contact with me.
*
* 2001/05/31: <rmk@arm.linux.org.uk>
* - Fix LCCR1 HSW value, fix all machine type specifications to
* keep values in line. (Please check your machine type specs)
*
* 2001/06/10: <rmk@arm.linux.org.uk>
* - Fiddle with the LCD controller from task context only; mainly
* so that we can run with interrupts on, and sleep.
* - Convert #warnings into #errors. No pain, no gain. ;)
*
* 2001/06/14: <rmk@arm.linux.org.uk>
* - Make the palette BPS value for 12bpp come out correctly.
* - Take notice of "greyscale" on any colour depth.
* - Make truecolor visuals use the RGB channel encoding information.
*
* 2001/07/02: <rmk@arm.linux.org.uk>
* - Fix colourmap problems.
*
* 2001/07/13: <abraham@2d3d.co.za>
* - Added support for the ICP LCD-Kit01 on LART. This LCD is
* manufactured by Prime View, model no V16C6448AB
*
* 2001/07/23: <rmk@arm.linux.org.uk>
* - Hand merge version from handhelds.org CVS tree. See patch
* notes for 595/1 for more information.
* - Drop 12bpp (it's 16bpp with different colour register mappings).
* - This hardware can not do direct colour. Therefore we don't
* support it.
*
* 2001/07/27: <rmk@arm.linux.org.uk>
* - Halve YRES on dual scan LCDs.
*
* 2001/08/22: <rmk@arm.linux.org.uk>
* - Add b/w iPAQ pixclock value.
*
* 2001/10/12: <rmk@arm.linux.org.uk>
* - Add patch 681/1 and clean up stork definitions.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/init.h>
#include <linux/cpufreq.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/uaccess.h>
#include <asm/arch/assabet.h>
#include <video/fbcon.h>
#include <video/fbcon-mfb.h>
#include <video/fbcon-cfb4.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
/*
* enable this if your panel appears to have broken
*/
#undef CHECK_COMPAT
/*
* debugging?
*/
#define DEBUG 0
/*
* Complain if VAR is out of range.
*/
#define DEBUG_VAR 1
#undef ASSABET_PAL_VIDEO
#include "sa1100fb.h"
void (*sa1100fb_blank_helper)(int blank);
EXPORT_SYMBOL(sa1100fb_blank_helper);
#ifdef CHECK_COMPAT
static void
sa1100fb_check_shadow(struct sa1100fb_lcd_reg *new_regs,
struct fb_var_screeninfo *var, u_int pcd)
{
struct sa1100fb_lcd_reg shadow;
int different = 0;
/*
* These machines are good machines!
*/
if (machine_is_assabet() || machine_is_h3600())
return;
/*
* The following ones are bad, bad, bad.
* Please make yours good!
*/
if (machine_is_pangolin()) {
DPRINTK("Configuring Pangolin LCD\n");
shadow.lccr0 =
LCCR0_LEN + LCCR0_Color + LCCR0_LDM +
LCCR0_BAM + LCCR0_ERM + LCCR0_Act +
LCCR0_LtlEnd + LCCR0_DMADel(0);
shadow.lccr1 =
LCCR1_DisWdth(var->xres) + LCCR1_HorSnchWdth(64) +
LCCR1_BegLnDel(160) + LCCR1_EndLnDel(24);
shadow.lccr2 =
LCCR2_DisHght(var->yres) + LCCR2_VrtSnchWdth(7) +
LCCR2_BegFrmDel(7) + LCCR2_EndFrmDel(1);
shadow.lccr3 =
LCCR3_PixClkDiv(pcd) + LCCR3_HorSnchH +
LCCR3_VrtSnchH + LCCR3_PixFlEdg + LCCR3_OutEnH;
DPRINTK("pcd = %x, PixCldDiv(pcd)=%x\n",
pcd, LCCR3_PixClkDiv(pcd));
}
if (machine_is_freebird()) {
DPRINTK("Configuring Freebird LCD\n");
#if 1
shadow.lccr0 = 0x00000038;
shadow.lccr1 = 0x010108e0;
shadow.lccr2 = 0x0000053f;
shadow.lccr3 = 0x00000c20;
#else
shadow.lccr0 =
LCCR0_LEN + LCCR0_Color + LCCR0_Sngl +
LCCR0_LDM + LCCR0_BAM + LCCR0_ERM + LCCR0_Pas +
LCCR0_LtlEnd + LCCR0_DMADel(0);
/* Check ,Chester */
shadow.lccr1 =
LCCR1_DisWdth(var->xres) + LCCR1_HorSnchWdth(5) +
LCCR1_BegLnDel(61) + LCCR1_EndLnDel(9);
/* Check ,Chester */
shadow.lccr2 =
LCCR2_DisHght(var->yres) + LCCR2_VrtSnchWdth(1) +
LCCR2_BegFrmDel(3) + LCCR2_EndFrmDel(0);
/* Check ,Chester */
shadow.lccr3 =
LCCR3_OutEnH + LCCR3_PixFlEdg + LCCR3_VrtSnchH +
LCCR3_HorSnchH + LCCR3_ACBsCntOff +
LCCR3_ACBsDiv(2) + LCCR3_PixClkDiv(pcd);
#endif
}
if (machine_is_brutus()) {
DPRINTK("Configuring Brutus LCD\n");
shadow.lccr0 =
LCCR0_LEN + LCCR0_Color + LCCR0_Sngl + LCCR0_Pas +
LCCR0_LtlEnd + LCCR0_LDM + LCCR0_BAM + LCCR0_ERM +
LCCR0_DMADel(0);
shadow.lccr1 =
LCCR1_DisWdth(var->xres) + LCCR1_HorSnchWdth(3) +
LCCR1_BegLnDel(41) + LCCR1_EndLnDel(101);
shadow.lccr2 =
LCCR2_DisHght(var->yres) + LCCR2_VrtSnchWdth(1) +
LCCR2_BegFrmDel(0) + LCCR2_EndFrmDel(0);
shadow.lccr3 =
LCCR3_OutEnH + LCCR3_PixRsEdg + LCCR3_VrtSnchH +
LCCR3_HorSnchH + LCCR3_ACBsCntOff +
LCCR3_ACBsDiv(2) + LCCR3_PixClkDiv(44);
}
if (machine_is_huw_webpanel()) {
DPRINTK("Configuring HuW LCD\n");
shadow.lccr0 = LCCR0_LEN + LCCR0_Dual + LCCR0_LDM;
shadow.lccr1 = LCCR1_DisWdth(var->xres) +
LCCR1_HorSnchWdth(3) +
LCCR1_BegLnDel(41) + LCCR1_EndLnDel(101);
shadow.lccr2 = 239 + LCCR2_VrtSnchWdth(1);
shadow.lccr3 = 8 + LCCR3_OutEnH +
LCCR3_PixRsEdg + LCCR3_VrtSnchH +
LCCR3_HorSnchH + LCCR3_ACBsCntOff + LCCR3_ACBsDiv(2);
}
if (machine_is_lart()) {
DPRINTK("Configuring LART LCD\n");
#if defined LART_GREY_LCD
shadow.lccr0 =
LCCR0_LEN + LCCR0_Mono + LCCR0_Sngl + LCCR0_Pas +
LCCR0_LtlEnd + LCCR0_LDM + LCCR0_BAM + LCCR0_ERM +
LCCR0_DMADel(0);
shadow.lccr1 =
LCCR1_DisWdth(var->xres) + LCCR1_HorSnchWdth(1) +
LCCR1_BegLnDel(4) + LCCR1_EndLnDel(2);
shadow.lccr2 =
LCCR2_DisHght(var->yres) + LCCR2_VrtSnchWdth(1) +
LCCR2_BegFrmDel(0) + LCCR2_EndFrmDel(0);
shadow.lccr3 =
LCCR3_PixClkDiv(34) + LCCR3_ACBsDiv(512) +
LCCR3_ACBsCntOff + LCCR3_HorSnchH + LCCR3_VrtSnchH;
#endif
#if defined LART_COLOR_LCD
shadow.lccr0 =
LCCR0_LEN + LCCR0_Color + LCCR0_Sngl + LCCR0_Act +
LCCR0_LtlEnd + LCCR0_LDM + LCCR0_BAM + LCCR0_ERM +
LCCR0_DMADel(0);
shadow.lccr1 =
LCCR1_DisWdth(var->xres) + LCCR1_HorSnchWdth(2) +
LCCR1_BegLnDel(69) + LCCR1_EndLnDel(8);
shadow.lccr2 =
LCCR2_DisHght(var->yres) + LCCR2_VrtSnchWdth(3) +
LCCR2_BegFrmDel(14) + LCCR2_EndFrmDel(4);
shadow.lccr3 =
LCCR3_PixClkDiv(34) + LCCR3_ACBsDiv(512) +
LCCR3_ACBsCntOff + LCCR3_HorSnchL + LCCR3_VrtSnchL +
LCCR3_PixFlEdg;
#endif
#if defined LART_VIDEO_OUT
shadow.lccr0 =
LCCR0_LEN + LCCR0_Color + LCCR0_Sngl + LCCR0_Act +
LCCR0_LtlEnd + LCCR0_LDM + LCCR0_BAM + LCCR0_ERM +
LCCR0_DMADel(0);
shadow.lccr1 =
LCCR1_DisWdth(640) + LCCR1_HorSnchWdth(95) +
LCCR1_BegLnDel(40) + LCCR1_EndLnDel(24);
shadow.lccr2 =
LCCR2_DisHght(480) + LCCR2_VrtSnchWdth(2) +
LCCR2_BegFrmDel(32) + LCCR2_EndFrmDel(11);
shadow.lccr3 =
LCCR3_PixClkDiv(8) + LCCR3_ACBsDiv(512) +
LCCR3_ACBsCntOff + LCCR3_HorSnchH + LCCR3_VrtSnchH +
LCCR3_PixFlEdg + LCCR3_OutEnL;
#endif
}
if (machine_is_graphicsclient()) {
DPRINTK("Configuring GraphicsClient LCD\n");
shadow.lccr0 =
LCCR0_LEN + LCCR0_Color + LCCR0_Sngl + LCCR0_Act;
shadow.lccr1 =
LCCR1_DisWdth(var->xres) + LCCR1_HorSnchWdth(9) +
LCCR1_EndLnDel(54) + LCCR1_BegLnDel(54);
shadow.lccr2 =
LCCR2_DisHght(var->yres) + LCCR2_VrtSnchWdth(9) +
LCCR2_EndFrmDel(32) + LCCR2_BegFrmDel(24);
shadow.lccr3 =
LCCR3_PixClkDiv(10) + LCCR3_ACBsDiv(2) +
LCCR3_ACBsCntOff + LCCR3_HorSnchL + LCCR3_VrtSnchL;
}
if (machine_is_omnimeter()) {
DPRINTK("Configuring OMNI LCD\n");
shadow.lccr0 = LCCR0_LEN | LCCR0_CMS | LCCR0_DPD;
shadow.lccr1 =
LCCR1_BegLnDel(10) + LCCR1_EndLnDel(10) +
LCCR1_HorSnchWdth(1) + LCCR1_DisWdth(var->xres);
shadow.lccr2 = LCCR2_DisHght(var->yres);
shadow.lccr3 =
LCCR3_ACBsDiv(0xFF) + LCCR3_PixClkDiv(44);
//jca (GetPCD(25) << LCD3_V_PCD);
}
if (machine_is_xp860()) {
DPRINTK("Configuring XP860 LCD\n");
shadow.lccr0 =
LCCR0_LEN + LCCR0_Color + LCCR0_Sngl + LCCR0_Act +
LCCR0_LtlEnd + LCCR0_LDM + LCCR0_ERM + LCCR0_DMADel(0);
shadow.lccr1 =
LCCR1_DisWdth(var->xres) +
LCCR1_HorSnchWdth(var->hsync_len) +
LCCR1_BegLnDel(var->left_margin) +
LCCR1_EndLnDel(var->right_margin);
shadow.lccr2 =
LCCR2_DisHght(var->yres) +
LCCR2_VrtSnchWdth(var->vsync_len) +
LCCR2_BegFrmDel(var->upper_margin) +
LCCR2_EndFrmDel(var->lower_margin);
shadow.lccr3 =
LCCR3_PixClkDiv(6) + LCCR3_HorSnchL + LCCR3_VrtSnchL;
}
/*
* Ok, since we're calculating these values, we want to know
* if the calculation is correct. If you see any of these
* messages _PLEASE_ report the incident to me for diagnosis,
* including details about what was happening when the
* messages appeared. --rmk, 30 March 2001
*/
if (shadow.lccr0 != new_regs->lccr0) {
printk(KERN_ERR "LCCR1 mismatch: 0x%08x != 0x%08x\n",
shadow.lccr1, new_regs->lccr1);
different = 1;
}
if (shadow.lccr1 != new_regs->lccr1) {
printk(KERN_ERR "LCCR1 mismatch: 0x%08x != 0x%08x\n",
shadow.lccr1, new_regs->lccr1);
different = 1;
}
if (shadow.lccr2 != new_regs->lccr2) {
printk(KERN_ERR "LCCR2 mismatch: 0x%08x != 0x%08x\n",
shadow.lccr2, new_regs->lccr2);
different = 1;
}
if (shadow.lccr3 != new_regs->lccr3) {
printk(KERN_ERR "LCCR3 mismatch: 0x%08x != 0x%08x\n",
shadow.lccr3, new_regs->lccr3);
different = 1;
}
if (different) {
printk(KERN_ERR "var: xres=%d hslen=%d lm=%d rm=%d\n",
var->xres, var->hsync_len,
var->left_margin, var->right_margin);
printk(KERN_ERR "var: yres=%d vslen=%d um=%d bm=%d\n",
var->yres, var->vsync_len,
var->upper_margin, var->lower_margin);
printk(KERN_ERR "Please report this to Russell King "
"<rmk@arm.linux.org.uk>\n");
}
DPRINTK("olccr0 = 0x%08x\n", shadow.lccr0);
DPRINTK("olccr1 = 0x%08x\n", shadow.lccr1);
DPRINTK("olccr2 = 0x%08x\n", shadow.lccr2);
DPRINTK("olccr3 = 0x%08x\n", shadow.lccr3);
}
#else
#define sa1100fb_check_shadow(regs,var,pcd)
#endif
/*
* IMHO this looks wrong. In 8BPP, length should be 8.
*/
static struct sa1100fb_rgb rgb_8 = {
red: { offset: 0, length: 4, },
green: { offset: 0, length: 4, },
blue: { offset: 0, length: 4, },
transp: { offset: 0, length: 0, },
};
static struct sa1100fb_rgb def_rgb_16 = {
red: { offset: 11, length: 5, },
green: { offset: 5, length: 6, },
blue: { offset: 0, length: 5, },
transp: { offset: 0, length: 0, },
};
#ifdef CONFIG_SA1100_ASSABET
#ifndef ASSABET_PAL_VIDEO
/*
* The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually
* takes an RGB666 signal, but we provide it with an RGB565 signal
* instead (def_rgb_16).
*/
static struct sa1100fb_mach_info lq039q2ds54_info __initdata = {
pixclock: 171521, bpp: 16,
xres: 320, yres: 240,
hsync_len: 5, vsync_len: 1,
left_margin: 61, upper_margin: 3,
right_margin: 9, lower_margin: 0,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
};
#else
static struct sa1100fb_mach_info pal_info __initdata = {
pixclock: 67797, bpp: 16,
xres: 640, yres: 512,
hsync_len: 64, vsync_len: 6,
left_margin: 125, upper_margin: 70,
right_margin: 115, lower_margin: 36,
sync: 0,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
};
#endif
#endif
#ifdef CONFIG_SA1100_H3600
static struct sa1100fb_mach_info h3600_info __initdata = {
#ifdef CONFIG_IPAQ_H3100
pixclock: 407766, bpp: 4,
xres: 320, yres: 240,
hsync_len: 26, vsync_len: 41,
left_margin: 4, upper_margin: 0,
right_margin: 4, lower_margin: 0,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
cmap_greyscale: 1, cmap_static: 1,
cmap_inverse: 1,
lccr0: LCCR0_Mono | LCCR0_4PixMono | LCCR0_Sngl | LCCR0_Pas,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
#else
pixclock: 174757, bpp: 16,
xres: 320, yres: 240,
hsync_len: 3, vsync_len: 3,
left_margin: 12, upper_margin: 10,
right_margin: 17, lower_margin: 1,
sync: 0,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
#endif
};
static struct sa1100fb_rgb h3600_rgb_16 = {
red: { offset: 12, length: 4, },
green: { offset: 7, length: 4, },
blue: { offset: 1, length: 4, },
transp: { offset: 0, length: 0, },
};
#endif
#ifdef CONFIG_SA1100_BRUTUS
static struct sa1100fb_mach_info brutus_info __initdata = {
pixclock: 0, bpp: 8,
xres: 320, yres: 240,
hsync_len: 3, vsync_len: 1,
left_margin: 41, upper_margin: 0,
right_margin: 101, lower_margin: 0,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Pas,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2) |
LCCR3_PixClkDiv(44),
};
#endif
#ifdef CONFIG_SA1100_CERF
static struct sa1100fb_mach_info cerf_info __initdata = {
#if defined(CONFIG_CERF_LCD_72_A)
pixclock: 171521, bpp: 8,
xres: 640, yres: 480,
lccr0: LCCR0_Color | LCCR0_Dual | LCCR0_Pas,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2) |
LCCR3_PixClkDiv(38),
#elif defined(CONFIG_CERF_LCD_57_A)
pixclock: 171521, bpp: 8,
xres: 320, yres: 240,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Pas,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2) |
LCCR3_PixClkDiv(38),
#elif defined(CONFIG_CERF_LCD_38_A)
pixclock: 171521, bpp: 8,
xres: 240, yres: 320,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Pas,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(56) |
LCCR3_PixClkDiv(38),
#elif defined(CONFIG_CERF_LCD_38_B)
pixclock: 171521, bpp: 4,
xres: 320, yres: 240,
lccr0: LCCR0_Mono | LCCR0_4PixMono | LCCR0_Sngl | LCCR0_Pas,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(56) |
LCCR3_PixClkDiv(38),
#else
#error "Must have a CerfBoard LCD form factor selected"
#endif
hsync_len: 5, vsync_len: 1,
left_margin: 61, upper_margin: 3,
right_margin: 9, lower_margin: 0,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
};
#if 0
static struct sa1100fb_rgb cerf_rgb_16 = {
red: { offset: 8, length: 4, },
green: { offset: 4, length: 4, },
blue: { offset: 0, length: 4, },
transp: { offset: 0, length: 0, },
};
#endif
#endif
#ifdef CONFIG_SA1100_FREEBIRD
#warning Please check this carefully
static struct sa1100fb_mach_info freebird_info __initdata = {
pixclock: 171521, bpp: 16,
xres: 240, yres: 320,
hsync_len: 3, vsync_len: 2,
left_margin: 2, upper_margin: 0,
right_margin: 2, lower_margin: 0,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Pas,
lccr3: LCCR3_OutEnH | LCCR3_PixFlEdg | LCCR3_ACBsDiv(2),
};
static struct sa1100fb_rgb freebird_rgb_16 = {
red: { offset: 8, length: 4, },
green: { offset: 4, length: 4, },
blue: { offset: 0, length: 4, },
transp: { offset: 12, length: 4, },
};
#endif
#ifdef CONFIG_SA1100_GRAPHICSCLIENT
static struct sa1100fb_mach_info graphicsclient_info __initdata = {
pixclock: 53500, bpp: 8,
xres: 640, yres: 480,
hsync_len: 9, vsync_len: 9,
left_margin: 54, upper_margin: 24,
right_margin: 54, lower_margin: 32,
sync: 0,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
};
#endif
#ifdef CONFIG_SA1100_HUW_WEBPANEL
static struct sa1100fb_mach_info huw_webpanel_info __initdata = {
pixclock: 0, bpp: 8,
xres: 640, yres: 480,
hsync_len: 3, vsync_len: 1,
left_margin: 41, upper_margin: 0,
right_margin: 101, lower_margin: 0,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
lccr0: LCCR0_Color | LCCR0_Dual | LCCR0_Pas,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2) | 8,
#error FIXME
/*
* FIXME: please get rid of the '| 8' in preference to an
* LCCR3_PixClkDiv() version. --rmk
*/
};
#endif
#ifdef LART_GREY_LCD
static struct sa1100fb_mach_info lart_grey_info __initdata = {
pixclock: 150000, bpp: 4,
xres: 320, yres: 240,
hsync_len: 1, vsync_len: 1,
left_margin: 4, upper_margin: 0,
right_margin: 2, lower_margin: 0,
cmap_greyscale: 1,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
lccr0: LCCR0_Mono | LCCR0_Sngl | LCCR0_Pas | LCCR0_4PixMono,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
};
#endif
#ifdef LART_COLOR_LCD
static struct sa1100fb_mach_info lart_color_info __initdata = {
pixclock: 150000, bpp: 16,
xres: 320, yres: 240,
hsync_len: 2, vsync_len: 3,
left_margin: 69, upper_margin: 14,
right_margin: 8, lower_margin: 4,
sync: 0,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnH | LCCR3_PixFlEdg | LCCR3_ACBsDiv(512),
};
#endif
#ifdef LART_VIDEO_OUT
static struct sa1100fb_mach_info lart_video_info __initdata = {
pixclock: 39721, bpp: 16,
xres: 640, yres: 480,
hsync_len: 95, vsync_len: 2,
left_margin: 40, upper_margin: 32,
right_margin: 24, lower_margin: 11,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnL | LCCR3_PixFlEdg | LCCR3_ACBsDiv(512),
};
#endif
#ifdef LART_KIT01_LCD
static struct sa1100fb_mach_info lart_kit01_info __initdata =
{
pixclock: 63291, bpp: 16,
xres: 640, yres: 480,
hsync_len: 64, vsync_len: 3,
left_margin: 122, upper_margin: 45,
right_margin: 10, lower_margin: 10,
sync: 0,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnH | LCCR3_PixFlEdg
};
#endif
#ifdef CONFIG_SA1100_OMNIMETER
static struct sa1100fb_mach_info omnimeter_info __initdata = {
pixclock: 0, bpp: 4,
xres: 480, yres: 320,
hsync_len: 1, vsync_len: 1,
left_margin: 10, upper_margin: 0,
right_margin: 10, lower_margin: 0,
cmap_greyscale: 1,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
lccr0: LCCR0_Mono | LCCR0_Sngl | LCCR0_Pas | LCCR0_8PixMono,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(255) |
LCCR3_PixClkDiv(44),
#error FIXME: fix pixclock, ACBsDiv
/*
* FIXME: I think ACBsDiv is wrong above - should it be 512 (disabled)?
* - rmk
*/
};
#endif
#ifdef CONFIG_SA1100_PANGOLIN
static struct sa1100fb_mach_info pangolin_info __initdata = {
pixclock: 341521, bpp: 16,
xres: 800, yres: 600,
hsync_len: 64, vsync_len: 7,
left_margin: 160, upper_margin: 7,
right_margin: 24, lower_margin: 1,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnH | LCCR3_PixFlEdg,
};
#endif
#ifdef CONFIG_SA1100_STORK
#if STORK_TFT /* ie the NEC TFT */
/*
* pixclock is ps per clock. say 72Hz, 800x600 clocks => (1/72)/(800*600)
* = 28935 and a bit
* NB likely to be increased to ease bus timings wrt pcmcia interface
*/
static struct sa1100fb_mach_info stork_tft_info __initdata = {
pixclock: 28935, bpp: 16,
xres: 640, yres: 480,
hsync_len: 64, vsync_len: 2,
left_margin: 48, upper_margin: 12,
right_margin: 48, lower_margin: 31,
sync: 0,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg,
};
static struct sa1100fb_rgb stork_tft_rgb_16 = {
red: { offset: 11, length: 5, },
green: { offset: 5, length: 6, },
blue: { offset: 0, length: 5, },
transp: { offset: 0, length: 0, },
};
#else /* Kyocera DSTN */
static struct sa1100fb_mach_info stork_dstn_info __initdata = {
pixclock: 0, bpp: 16,
xres: 640, yres: 480,
hsync_len: 2, vsync_len: 2,
left_margin: 2, upper_margin: 0,
right_margin: 2, lower_margin: 0,
sync: FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT ,
lccr0: LCCR0_Color | LCCR0_Dual | LCCR0_Pas,
#error Fixme
lccr3: 0xff00 |
0x18 /* ought to be 0x14 but DMA isn't up to that as yet */
};
static struct sa1100fb_rgb stork_dstn_rgb_16 = {
red: { offset: 8, length: 4, },
green: { offset: 4, length: 4, },
blue: { offset: 0, length: 4, },
transp: { offset: 0, length: 0, },
};
#endif
#endif
#ifdef CONFIG_SA1100_XP860
static struct sa1100fb_mach_info xp860_info __initdata = {
pixclock: 0, bpp: 8,
xres: 1024, yres: 768,
hsync_len: 3, vsync_len: 3,
left_margin: 3, upper_margin: 2,
right_margin: 2, lower_margin: 1,
sync: 0,
lccr0: LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
lccr3: LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_PixClkDiv(6),
};
#endif
static struct sa1100fb_mach_info * __init
sa1100fb_get_machine_info(struct sa1100fb_info *fbi)
{
struct sa1100fb_mach_info *inf = NULL;
/*
* R G B T
* default {11,5}, { 5,6}, { 0,5}, { 0,0}
* h3600 {12,4}, { 7,4}, { 1,4}, { 0,0}
* freebird { 8,4}, { 4,4}, { 0,4}, {12,4}
*/
#ifdef CONFIG_SA1100_ASSABET
if (machine_is_assabet()) {
#ifndef ASSABET_PAL_VIDEO
inf = &lq039q2ds54_info;
#else
inf = &pal_info;
#endif
}
#endif
#ifdef CONFIG_SA1100_H3600
if (machine_is_h3600()) {
inf = &h3600_info;
fbi->rgb[RGB_16] = &h3600_rgb_16;
}
#endif
#ifdef CONFIG_SA1100_BRUTUS
if (machine_is_brutus()) {
inf = &brutus_info;
}
#endif
#ifdef CONFIG_SA1100_CERF
if (machine_is_cerf()) {
inf = &cerf_info;
}
#endif
#ifdef CONFIG_SA1100_FREEBIRD
if (machine_is_freebird()) {
inf = &freebird_info;
fbi->rgb[RGB_16] = &freebird_rgb16;
}
#endif
#ifdef CONFIG_SA1100_GRAPHICSCLIENT
if (machine_is_graphicsclient()) {
inf = &graphicsclient_info;
}
#endif
#ifdef CONFIG_SA1100_HUW_WEBPANEL
if (machine_is_huw_webpanel()) {
inf = &huw_webpanel_info;
}
#endif
#ifdef CONFIG_SA1100_LART
if (machine_is_lart()) {
#ifdef LART_GREY_LCD
inf = &lart_grey_info;
#endif
#ifdef LART_COLOR_LCD
inf = &lart_color_info;
#endif
#ifdef LART_VIDEO_OUT
inf = &lart_video_info;
#endif
#ifdef LART_KIT01_LCD
inf = &lart_kit01_info;
#endif
}
#endif
#ifdef CONFIG_SA1100_OMNIMETER
if (machine_is_omnimeter()) {
inf = &omnimeter_info;
}
#endif
#ifdef CONFIG_SA1100_PANGOLIN
if (machine_is_pangolin()) {
inf = &pangolin_info;
}
#endif
#ifdef CONFIG_SA1100_XP860
if (machine_is_xp860()) {
inf = &xp860_info;
}
#endif
#ifdef CONFIG_SA1100_STORK
if (machine_is_stork()) {
#if STORK_TFT
inf = &stork_tft_info;
fbi->rgb[RGB_16] = &stork_tft_rgb_16;
#else
inf = &stork_dstn_info;
fbi->rgb[RGB_16] = &stork_dstn_rgb_16;
#endif
}
#endif
return inf;
}
static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *);
static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state);
static inline void sa1100fb_schedule_task(struct sa1100fb_info *fbi, u_int state)
{
unsigned long flags;
local_irq_save(flags);
/*
* We need to handle two requests being made at the same time.
* There are two important cases:
* 1. When we are changing VT (C_REENABLE) while unblanking (C_ENABLE)
* We must perform the unblanking, which will do our REENABLE for us.
* 2. When we are blanking, but immediately unblank before we have
* blanked. We do the "REENABLE" thing here as well, just to be sure.
*/
if (fbi->task_state == C_ENABLE && state == C_REENABLE)
state = (u_int) -1;
if (fbi->task_state == C_DISABLE && state == C_ENABLE)
state = C_REENABLE;
if (state != (u_int)-1) {
fbi->task_state = state;
schedule_task(&fbi->task);
}
local_irq_restore(flags);
}
/*
* Get the VAR structure pointer for the specified console
*/
static inline struct fb_var_screeninfo *get_con_var(struct fb_info *info, int con)
{
struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
return (con == fbi->currcon || con == -1) ? &fbi->fb.var : &fb_display[con].var;
}
/*
* Get the DISPLAY structure pointer for the specified console
*/
static inline struct display *get_con_display(struct fb_info *info, int con)
{
struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
return (con < 0) ? fbi->fb.disp : &fb_display[con];
}
/*
* Get the CMAP pointer for the specified console
*/
static inline struct fb_cmap *get_con_cmap(struct fb_info *info, int con)
{
struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
return (con == fbi->currcon || con == -1) ? &fbi->fb.cmap : &fb_display[con].cmap;
}
static inline u_int
chan_to_field(u_int chan, struct fb_bitfield *bf)
{
chan &= 0xffff;
chan >>= 16 - bf->length;
return chan << bf->offset;
}
/*
* Convert bits-per-pixel to a hardware palette PBS value.
*/
static inline u_int
palette_pbs(struct fb_var_screeninfo *var)
{
int ret = 0;
switch (var->bits_per_pixel) {
#ifdef FBCON_HAS_CFB4
case 4: ret = 0 << 12; break;
#endif
#ifdef FBCON_HAS_CFB8
case 8: ret = 1 << 12; break;
#endif
#ifdef FBCON_HAS_CFB16
case 16: ret = 2 << 12; break;
#endif
}
return ret;
}
static int
sa1100fb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
u_int trans, struct fb_info *info)
{
struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
u_int val, ret = 1;
if (regno < fbi->palette_size) {
val = ((red >> 4) & 0xf00);
val |= ((green >> 8) & 0x0f0);
val |= ((blue >> 12) & 0x00f);
if (regno == 0)
val |= palette_pbs(&fbi->fb.var);
fbi->palette_cpu[regno] = val;
ret = 0;
}
return ret;
}
static int
sa1100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int trans, struct fb_info *info)
{
struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
struct display *disp = get_con_display(info, fbi->currcon);
u_int val;
int ret = 1;
/*
* If inverse mode was selected, invert all the colours
* rather than the register number. The register number
* is what you poke into the framebuffer to produce the
* colour you requested.
*/
if (disp->inverse) {
red = 0xffff - red;
green = 0xffff - green;
blue = 0xffff - blue;
}
/*
* If greyscale is true, then we convert the RGB value
* to greyscale no mater what visual we are using.
*/
if (fbi->fb.var.grayscale)
red = green = blue = (19595 * red + 38470 * green +
7471 * blue) >> 16;
switch (fbi->fb.disp->visual) {
case FB_VISUAL_TRUECOLOR:
/*
* 12 or 16-bit True Colour. We encode the RGB value
* according to the RGB bitfield information.
*/
if (regno < 16) {
u16 *pal = fbi->fb.pseudo_palette;
val = chan_to_field(red, &fbi->fb.var.red);
val |= chan_to_field(green, &fbi->fb.var.green);
val |= chan_to_field(blue, &fbi->fb.var.blue);
pal[regno] = val;
ret = 0;
}
break;
case FB_VISUAL_STATIC_PSEUDOCOLOR:
case FB_VISUAL_PSEUDOCOLOR:
ret = sa1100fb_setpalettereg(regno, red, green, blue, trans, info);
break;
}
return ret;
}
/*
* sa1100fb_display_dma_period()
* Calculate the minimum period (in picoseconds) between two DMA
* requests for the LCD controller.
*/
static unsigned int
sa1100fb_display_dma_period(struct fb_var_screeninfo *var)
{
unsigned int mem_bits_per_pixel;
mem_bits_per_pixel = var->bits_per_pixel;
if (mem_bits_per_pixel == 12)
mem_bits_per_pixel = 16;
/*
* Period = pixclock * bits_per_byte * bytes_per_transfer
* / memory_bits_per_pixel;
*/
return var->pixclock * 8 * 16 / mem_bits_per_pixel;
}
/*
* sa1100fb_decode_var():
* Get the video params out of 'var'. If a value doesn't fit, round it up,
* if it's too big, return -EINVAL.
*
* Suggestion: Round up in the following order: bits_per_pixel, xres,
* yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
* bitfields, horizontal timing, vertical timing.
*/
static int
sa1100fb_validate_var(struct fb_var_screeninfo *var,
struct sa1100fb_info *fbi)
{
int ret = -EINVAL;
if (var->xres < MIN_XRES)
var->xres = MIN_XRES;
if (var->yres < MIN_YRES)
var->yres = MIN_YRES;
if (var->xres > fbi->max_xres)
var->xres = fbi->max_xres;
if (var->yres > fbi->max_yres)
var->yres = fbi->max_yres;
var->xres_virtual =
var->xres_virtual < var->xres ? var->xres : var->xres_virtual;
var->yres_virtual =
var->yres_virtual < var->yres ? var->yres : var->yres_virtual;
DPRINTK("var->bits_per_pixel=%d\n", var->bits_per_pixel);
switch (var->bits_per_pixel) {
#ifdef FBCON_HAS_CFB4
case 4: ret = 0; break;
#endif
#ifdef FBCON_HAS_CFB8
case 8: ret = 0; break;
#endif
#ifdef FBCON_HAS_CFB16
case 16: ret = 0; break;
#endif
default:
break;
}
#ifdef CONFIG_CPU_FREQ
printk(KERN_DEBUG "dma period = %d ps, clock = %d kHz\n",
sa1100fb_display_dma_period(var),
cpufreq_get(smp_processor_id()));
#endif
return ret;
}
static inline void sa1100fb_set_truecolor(u_int is_true_color)
{
DPRINTK("true_color = %d\n", is_true_color);
if (machine_is_assabet()) {
#if 1
// phase 4 or newer Assabet's
if (is_true_color)
ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
else
ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
#else
// older Assabet's
if (is_true_color)
ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
else
ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
#endif
}
}
static void
sa1100fb_hw_set_var(struct fb_var_screeninfo *var, struct sa1100fb_info *fbi)
{
u_long palette_mem_size;
fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
palette_mem_size = fbi->palette_size * sizeof(u16);
DPRINTK("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
fb_set_cmap(&fbi->fb.cmap, 1, sa1100fb_setcolreg, &fbi->fb);
/* Set board control register to handle new color depth */
sa1100fb_set_truecolor(var->bits_per_pixel >= 16);
#ifdef CONFIG_SA1100_OMNIMETER
#error Do we have to do this here? We already do it at init time.
if (machine_is_omnimeter())
SetLCDContrast(DefaultLCDContrast);
#endif
sa1100fb_activate_var(var, fbi);
fbi->palette_cpu[0] = (fbi->palette_cpu[0] &
0xcfff) | palette_pbs(var);
}
/*
* sa1100fb_set_var():
* Set the user defined part of the display for the specified console
*/
static int
sa1100fb_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
{
struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
struct fb_var_screeninfo *dvar = get_con_var(&fbi->fb, con);
struct display *display = get_con_display(&fbi->fb, con);
int err, chgvar = 0, rgbidx;
DPRINTK("set_var\n");
/*
* Decode var contents into a par structure, adjusting any
* out of range values.
*/
err = sa1100fb_validate_var(var, fbi);
if (err)
return err;
if (var->activate & FB_ACTIVATE_TEST)
return 0;
if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW)
return -EINVAL;
if (dvar->xres != var->xres)
chgvar = 1;
if (dvar->yres != var->yres)
chgvar = 1;
if (dvar->xres_virtual != var->xres_virtual)
chgvar = 1;
if (dvar->yres_virtual != var->yres_virtual)
chgvar = 1;
if (dvar->bits_per_pixel != var->bits_per_pixel)
chgvar = 1;
if (con < 0)
chgvar = 0;
switch (var->bits_per_pixel) {
#ifdef FBCON_HAS_CFB4
case 4:
if (fbi->cmap_static)
display->visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
else
display->visual = FB_VISUAL_PSEUDOCOLOR;
display->line_length = var->xres / 2;
display->dispsw = &fbcon_cfb4;
rgbidx = RGB_8;
break;
#endif
#ifdef FBCON_HAS_CFB8
case 8:
if (fbi->cmap_static)
display->visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
else
display->visual = FB_VISUAL_PSEUDOCOLOR;
display->line_length = var->xres;
display->dispsw = &fbcon_cfb8;
rgbidx = RGB_8;
break;
#endif
#ifdef FBCON_HAS_CFB16
case 16:
display->visual = FB_VISUAL_TRUECOLOR;
display->line_length = var->xres * 2;
display->dispsw = &fbcon_cfb16;
display->dispsw_data = fbi->fb.pseudo_palette;
rgbidx = RGB_16;
break;
#endif
default:
rgbidx = 0;
display->dispsw = &fbcon_dummy;
break;
}
display->screen_base = fbi->screen_cpu;
display->next_line = display->line_length;
display->type = fbi->fb.fix.type;
display->type_aux = fbi->fb.fix.type_aux;
display->ypanstep = fbi->fb.fix.ypanstep;
display->ywrapstep = fbi->fb.fix.ywrapstep;
display->can_soft_blank = 1;
display->inverse = fbi->cmap_inverse;
*dvar = *var;
dvar->activate &= ~FB_ACTIVATE_ALL;
/*
* Copy the RGB parameters for this display
* from the machine specific parameters.
*/
dvar->red = fbi->rgb[rgbidx]->red;
dvar->green = fbi->rgb[rgbidx]->green;
dvar->blue = fbi->rgb[rgbidx]->blue;
dvar->transp = fbi->rgb[rgbidx]->transp;
DPRINTK("RGBT length = %d:%d:%d:%d\n",
dvar->red.length, dvar->green.length, dvar->blue.length,
dvar->transp.length);
DPRINTK("RGBT offset = %d:%d:%d:%d\n",
dvar->red.offset, dvar->green.offset, dvar->blue.offset,
dvar->transp.offset);
/*
* Update the old var. The fbcon drivers still use this.
* Once they are using fbi->fb.var, this can be dropped.
*/
display->var = *dvar;
/*
* If we are setting all the virtual consoles, also set the
* defaults used to create new consoles.
*/
if (var->activate & FB_ACTIVATE_ALL)
fbi->fb.disp->var = *dvar;
/*
* If the console has changed and the console has defined
* a changevar function, call that function.
*/
if (chgvar && info && fbi->fb.changevar)
fbi->fb.changevar(con);
/* If the current console is selected, activate the new var. */
if (con != fbi->currcon)
return 0;
sa1100fb_hw_set_var(dvar, fbi);
return 0;
}
static int
__do_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
struct fb_cmap *dcmap = get_con_cmap(info, con);
int err = 0;
if (con == -1)
con = fbi->currcon;
/* no colormap allocated? (we always have "this" colour map allocated) */
if (con >= 0)
err = fb_alloc_cmap(&fb_display[con].cmap, fbi->palette_size, 0);
if (!err && con == fbi->currcon)
err = fb_set_cmap(cmap, kspc, sa1100fb_setcolreg, info);
if (!err)
fb_copy_cmap(cmap, dcmap, kspc ? 0 : 1);
return err;
}
static int
sa1100fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
struct display *disp = get_con_display(info, con);
if (disp->visual == FB_VISUAL_TRUECOLOR ||
disp->visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
return -EINVAL;
return __do_set_cmap(cmap, kspc, con, info);
}
static int
sa1100fb_get_fix(struct fb_fix_screeninfo *fix, int con, struct fb_info *info)
{
struct display *display = get_con_display(info, con);
*fix = info->fix;
fix->line_length = display->line_length;
fix->visual = display->visual;
return 0;
}
static int
sa1100fb_get_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
{
*var = *get_con_var(info, con);
return 0;
}
static int
sa1100fb_get_cmap(struct fb_cmap *cmap, int kspc, int con, struct fb_info *info)
{
struct fb_cmap *dcmap = get_con_cmap(info, con);
fb_copy_cmap(dcmap, cmap, kspc ? 0 : 2);
return 0;
}
static struct fb_ops sa1100fb_ops = {
owner: THIS_MODULE,
fb_get_fix: sa1100fb_get_fix,
fb_get_var: sa1100fb_get_var,
fb_set_var: sa1100fb_set_var,
fb_get_cmap: sa1100fb_get_cmap,
fb_set_cmap: sa1100fb_set_cmap,
};
/*
* sa1100fb_switch():
* Change to the specified console. Palette and video mode
* are changed to the console's stored parameters.
*
* Uh oh, this can be called from a tasklet (IRQ)
*/
static int sa1100fb_switch(int con, struct fb_info *info)
{
struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
struct display *disp;
struct fb_cmap *cmap;
DPRINTK("con=%d info->modename=%s\n", con, fbi->fb.modename);
if (con == fbi->currcon)
return 0;
if (fbi->currcon >= 0) {
disp = fb_display + fbi->currcon;
/*
* Save the old colormap and video mode.
*/
disp->var = fbi->fb.var;
if (disp->cmap.len)
fb_copy_cmap(&fbi->fb.cmap, &disp->cmap, 0);
}
fbi->currcon = con;
disp = fb_display + con;
/*
* Make sure that our colourmap contains 256 entries.
*/
fb_alloc_cmap(&fbi->fb.cmap, 256, 0);
if (disp->cmap.len)
cmap = &disp->cmap;
else
cmap = fb_default_cmap(1 << disp->var.bits_per_pixel);
fb_copy_cmap(cmap, &fbi->fb.cmap, 0);
fbi->fb.var = disp->var;
fbi->fb.var.activate = FB_ACTIVATE_NOW;
sa1100fb_set_var(&fbi->fb.var, con, info);
return 0;
}
/*
* Formal definition of the VESA spec:
* On
* This refers to the state of the display when it is in full operation
* Stand-By
* This defines an optional operating state of minimal power reduction with
* the shortest recovery time
* Suspend
* This refers to a level of power management in which substantial power
* reduction is achieved by the display. The display can have a longer
* recovery time from this state than from the Stand-by state
* Off
* This indicates that the display is consuming the lowest level of power
* and is non-operational. Recovery from this state may optionally require
* the user to manually power on the monitor
*
* Now, the fbdev driver adds an additional state, (blank), where they
* turn off the video (maybe by colormap tricks), but don't mess with the
* video itself: think of it semantically between on and Stand-By.
*
* So here's what we should do in our fbdev blank routine:
*
* VESA_NO_BLANKING (mode 0) Video on, front/back light on
* VESA_VSYNC_SUSPEND (mode 1) Video on, front/back light off
* VESA_HSYNC_SUSPEND (mode 2) Video on, front/back light off
* VESA_POWERDOWN (mode 3) Video off, front/back light off
*
* This will match the matrox implementation.
*/
/*
* sa1100fb_blank():
* Blank the display by setting all palette values to zero. Note, the
* 12 and 16 bpp modes don't really use the palette, so this will not
* blank the display in all modes.
*/
static void sa1100fb_blank(int blank, struct fb_info *info)
{
struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
int i;
DPRINTK("sa1100fb_blank: blank=%d info->modename=%s\n", blank,
fbi->fb.modename);
switch (blank) {
case VESA_POWERDOWN:
case VESA_VSYNC_SUSPEND:
case VESA_HSYNC_SUSPEND:
if (fbi->fb.disp->visual == FB_VISUAL_PSEUDOCOLOR ||
fbi->fb.disp->visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
for (i = 0; i < fbi->palette_size; i++)
sa1100fb_setpalettereg(i, 0, 0, 0, 0, info);
sa1100fb_schedule_task(fbi, C_DISABLE);
if (sa1100fb_blank_helper)
sa1100fb_blank_helper(blank);
break;
case VESA_NO_BLANKING:
if (sa1100fb_blank_helper)
sa1100fb_blank_helper(blank);
if (fbi->fb.disp->visual == FB_VISUAL_PSEUDOCOLOR ||
fbi->fb.disp->visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
fb_set_cmap(&fbi->fb.cmap, 1, sa1100fb_setcolreg, info);
sa1100fb_schedule_task(fbi, C_ENABLE);
}
}
static int sa1100fb_updatevar(int con, struct fb_info *info)
{
DPRINTK("entered\n");
return 0;
}
/*
* Calculate the PCD value from the clock rate (in picoseconds).
* We take account of the PPCR clock setting.
*/
static inline int get_pcd(unsigned int pixclock)
{
unsigned int pcd;
if (pixclock) {
pcd = get_cclk_frequency() * pixclock;
pcd /= 10000000;
pcd += 1; /* make up for integer math truncations */
} else {
/*
* People seem to be missing this message. Make it big.
* Make it stand out. Make sure people see it.
*/
printk(KERN_WARNING "******************************************************\n");
printk(KERN_WARNING "** ZERO PIXEL CLOCK DETECTED **\n");
printk(KERN_WARNING "** You are using a zero pixclock. This means that **\n");
printk(KERN_WARNING "** clock scaling will not be able to adjust your **\n");
printk(KERN_WARNING "** your timing parameters appropriately, and the **\n");
printk(KERN_WARNING "** bandwidth calculations will fail to work. This **\n");
printk(KERN_WARNING "** will shortly become an error condition, which **\n");
printk(KERN_WARNING "** will prevent your LCD display working. Please **\n");
printk(KERN_WARNING "** send your patches in as soon as possible to shut **\n");
printk(KERN_WARNING "** this message up. **\n");
printk(KERN_WARNING "******************************************************\n");
pcd = 0;
}
return pcd;
}
/*
* sa1100fb_activate_var():
* Configures LCD Controller based on entries in var parameter. Settings are
* only written to the controller if changes were made.
*/
static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *fbi)
{
struct sa1100fb_lcd_reg new_regs;
u_int half_screen_size, yres, pcd = get_pcd(var->pixclock);
u_long flags;
DPRINTK("Configuring SA1100 LCD\n");
DPRINTK("var: xres=%d hslen=%d lm=%d rm=%d\n",
var->xres, var->hsync_len,
var->left_margin, var->right_margin);
DPRINTK("var: yres=%d vslen=%d um=%d bm=%d\n",
var->yres, var->vsync_len,
var->upper_margin, var->lower_margin);
#if DEBUG_VAR
if (var->xres < 16 || var->xres > 1024)
printk(KERN_ERR "%s: invalid xres %d\n",
fbi->fb.fix.id, var->xres);
if (var->hsync_len < 1 || var->hsync_len > 64)
printk(KERN_ERR "%s: invalid hsync_len %d\n",
fbi->fb.fix.id, var->hsync_len);
if (var->left_margin < 1 || var->left_margin > 255)
printk(KERN_ERR "%s: invalid left_margin %d\n",
fbi->fb.fix.id, var->left_margin);
if (var->right_margin < 1 || var->right_margin > 255)
printk(KERN_ERR "%s: invalid right_margin %d\n",
fbi->fb.fix.id, var->right_margin);
if (var->yres < 1 || var->yres > 1024)
printk(KERN_ERR "%s: invalid yres %d\n",
fbi->fb.fix.id, var->yres);
if (var->vsync_len < 1 || var->vsync_len > 64)
printk(KERN_ERR "%s: invalid vsync_len %d\n",
fbi->fb.fix.id, var->vsync_len);
if (var->upper_margin < 0 || var->upper_margin > 255)
printk(KERN_ERR "%s: invalid upper_margin %d\n",
fbi->fb.fix.id, var->upper_margin);
if (var->lower_margin < 0 || var->lower_margin > 255)
printk(KERN_ERR "%s: invalid lower_margin %d\n",
fbi->fb.fix.id, var->lower_margin);
#endif
new_regs.lccr0 = fbi->lccr0 |
LCCR0_LEN | LCCR0_LDM | LCCR0_BAM |
LCCR0_ERM | LCCR0_LtlEnd | LCCR0_DMADel(0);
new_regs.lccr1 =
LCCR1_DisWdth(var->xres) +
LCCR1_HorSnchWdth(var->hsync_len) +
LCCR1_BegLnDel(var->left_margin) +
LCCR1_EndLnDel(var->right_margin);
/*
* If we have a dual scan LCD, then we need to halve
* the YRES parameter.
*/
yres = var->yres;
if (fbi->lccr0 & LCCR0_Dual)
yres /= 2;
new_regs.lccr2 =
LCCR2_DisHght(yres) +
LCCR2_VrtSnchWdth(var->vsync_len) +
LCCR2_BegFrmDel(var->upper_margin) +
LCCR2_EndFrmDel(var->lower_margin);
new_regs.lccr3 = fbi->lccr3 |
(var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) |
(var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL) |
LCCR3_ACBsCntOff;
if (pcd)
new_regs.lccr3 |= LCCR3_PixClkDiv(pcd);
sa1100fb_check_shadow(&new_regs, var, pcd);
DPRINTK("nlccr0 = 0x%08x\n", new_regs.lccr0);
DPRINTK("nlccr1 = 0x%08x\n", new_regs.lccr1);
DPRINTK("nlccr2 = 0x%08x\n", new_regs.lccr2);
DPRINTK("nlccr3 = 0x%08x\n", new_regs.lccr3);
half_screen_size = var->bits_per_pixel;
half_screen_size = half_screen_size * var->xres * var->yres / 16;
/* Update shadow copy atomically */
local_irq_save(flags);
fbi->dbar1 = fbi->palette_dma;
fbi->dbar2 = fbi->screen_dma + half_screen_size;
fbi->reg_lccr0 = new_regs.lccr0;
fbi->reg_lccr1 = new_regs.lccr1;
fbi->reg_lccr2 = new_regs.lccr2;
fbi->reg_lccr3 = new_regs.lccr3;
local_irq_restore(flags);
/*
* Only update the registers if the controller is enabled
* and something has changed.
*/
if ((LCCR0 != fbi->reg_lccr0) || (LCCR1 != fbi->reg_lccr1) ||
(LCCR2 != fbi->reg_lccr2) || (LCCR3 != fbi->reg_lccr3) ||
(DBAR1 != fbi->dbar1) || (DBAR2 != fbi->dbar2))
sa1100fb_schedule_task(fbi, C_REENABLE);
return 0;
}
/*
* NOTE! The following functions are purely helpers for set_ctrlr_state.
* Do not call them directly; set_ctrlr_state does the correct serialisation
* to ensure that things happen in the right way 100% of time time.
* -- rmk
*/
/*
* FIXME: move LCD power stuff into sa1100fb_power_up_lcd()
* Also, I'm expecting that the backlight stuff should
* be handled differently.
*/
static void sa1100fb_backlight_on(struct sa1100fb_info *fbi)
{
DPRINTK("backlight on\n");
#ifdef CONFIG_SA1100_FREEBIRD
#error FIXME
if (machine_is_freebird()) {
BCR_set(BCR_FREEBIRD_LCD_PWR | BCR_FREEBIRD_LCD_DISP);
}
#endif
#ifdef CONFIG_SA1100_FREEBIRD
if (machine_is_freebird()) {
/* Turn on backlight ,Chester */
BCR_set(BCR_FREEBIRD_LCD_BACKLIGHT);
}
#endif
#ifdef CONFIG_SA1100_HUW_WEBPANEL
#error FIXME
if (machine_is_huw_webpanel()) {
BCR_set(BCR_CCFL_POW + BCR_PWM_BACKLIGHT);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_task(200 * HZ / 1000);
BCR_set(BCR_TFT_ENA);
}
#endif
#ifdef CONFIG_SA1100_OMNIMETER
if (machine_is_omnimeter())
LEDBacklightOn();
#endif
}
/*
* FIXME: move LCD power stuf into sa1100fb_power_down_lcd()
* Also, I'm expecting that the backlight stuff should
* be handled differently.
*/
static void sa1100fb_backlight_off(struct sa1100fb_info *fbi)
{
DPRINTK("backlight off\n");
#ifdef CONFIG_SA1100_FREEBIRD
#error FIXME
if (machine_is_freebird()) {
BCR_clear(BCR_FREEBIRD_LCD_PWR | BCR_FREEBIRD_LCD_DISP
/*| BCR_FREEBIRD_LCD_BACKLIGHT */ );
}
#endif
#ifdef CONFIG_SA1100_OMNIMETER
if (machine_is_omnimeter())
LEDBacklightOff();
#endif
}
static void sa1100fb_power_up_lcd(struct sa1100fb_info *fbi)
{
DPRINTK("LCD power on\n");
#ifndef ASSABET_PAL_VIDEO
if (machine_is_assabet())
ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
#endif
#ifdef CONFIG_SA1100_HUW_WEBPANEL
if (machine_is_huw_webpanel())
BCR_clear(BCR_TFT_NPWR);
#endif
#ifdef CONFIG_SA1100_OMNIMETER
if (machine_is_omnimeter())
LCDPowerOn();
#endif
#ifdef CONFIG_SA1100_H3600
if (machine_is_h3600()) {
set_h3600_egpio(EGPIO_H3600_LCD_ON |
EGPIO_H3600_LCD_PCI |
EGPIO_H3600_LCD_5V_ON |
EGPIO_H3600_LVDD_ON);
}
#endif
#ifdef CONFIG_SA1100_STORK
if (machine_is_stork()) {
storkSetLCDCPLD(0, 1);
storkSetLatchA(STORK_LCD_BACKLIGHT_INVERTER_ON);
}
#endif
}
static void sa1100fb_power_down_lcd(struct sa1100fb_info *fbi)
{
DPRINTK("LCD power off\n");
#ifndef ASSABET_PAL_VIDEO
if (machine_is_assabet())
ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
#endif
#ifdef CONFIG_SA1100_HUW_WEBPANEL
// dont forget to set the control lines to zero (?)
if (machine_is_huw_webpanel())
BCR_set(BCR_TFT_NPWR);
#endif
#ifdef CONFIG_SA1100_H3600
if (machine_is_h3600()) {
clr_h3600_egpio(EGPIO_H3600_LCD_ON |
EGPIO_H3600_LCD_PCI |
EGPIO_H3600_LCD_5V_ON |
EGPIO_H3600_LVDD_ON);
}
#endif
#ifdef CONFIG_SA1100_STORK
if (machine_is_stork()) {
storkSetLCDCPLD(0, 0);
storkClearLatchA(STORK_LCD_BACKLIGHT_INVERTER_ON);
}
#endif
}
static void sa1100fb_setup_gpio(struct sa1100fb_info *fbi)
{
u_int mask = 0;
/*
* Enable GPIO<9:2> for LCD use if:
* 1. Active display, or
* 2. Color Dual Passive display
*
* see table 11.8 on page 11-27 in the SA1100 manual
* -- Erik.
*
* SA1110 spec update nr. 25 says we can and should
* clear LDD15 to 12 for 4 or 8bpp modes with active
* panels.
*/
if ((fbi->reg_lccr0 & LCCR0_CMS) == LCCR0_Color &&
(fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) != 0) {
mask = GPIO_LDD11 | GPIO_LDD10 | GPIO_LDD9 | GPIO_LDD8;
if (fbi->fb.var.bits_per_pixel > 8 ||
(fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) == LCCR0_Dual)
mask |= GPIO_LDD15 | GPIO_LDD14 | GPIO_LDD13 | GPIO_LDD12;
}
#ifdef CONFIG_SA1100_FREEBIRD
#error Please contact <rmk@arm.linux.org.uk> about this
if (machine_is_freebird()) {
/* Color single passive */
mask |= GPIO_LDD15 | GPIO_LDD14 | GPIO_LDD13 | GPIO_LDD12 |
GPIO_LDD11 | GPIO_LDD10 | GPIO_LDD9 | GPIO_LDD8;
}
#endif
if (machine_is_cerf()) {
/* GPIO15 is used as a bypass for 3.8" displays */
mask |= GPIO_GPIO15;
#ifdef CONFIG_SA1100_CERF
#warning Read Me Now!
#endif
#if 0 /* if this causes you problems, mail <rmk@arm.linux.org.uk> please. */
/*
* This was enabled for the 72_A version only, which is a _color_
* _dual_ LCD. Now look at the generic test above, and calculate
* the mask value for a colour dual display...
*
* I therefore conclude that the code below is redundant, and will
* be killed at the start of November 2001.
*/
/* FIXME: why is this? The Cerf's display doesn't seem
* to be dual scan or active. I just leave it here,
* but in my opinion this is definitively wrong.
* -- Erik <J.A.K.Mouw@its.tudelft.nl>
*/
/* REPLY: Umm.. Well to be honest, the 5.7" LCD which
* this was used for does not use these pins, but
* apparently all hell breaks loose if they are not
* set on the Cerf, so we decided to leave them in ;)
* -- Daniel Chemko <dchemko@intrinsyc.com>
*/
/* color {dual/single} passive */
mask |= GPIO_LDD15 | GPIO_LDD14 | GPIO_LDD13 | GPIO_LDD12 |
GPIO_LDD11 | GPIO_LDD10 | GPIO_LDD9 | GPIO_LDD8;
#endif
}
if (mask) {
GPDR |= mask;
GAFR |= mask;
}
}
static void sa1100fb_enable_controller(struct sa1100fb_info *fbi)
{
DPRINTK("Enabling LCD controller\n");
/*
* Make sure the mode bits are present in the first palette entry
*/
fbi->palette_cpu[0] &= 0xcfff;
fbi->palette_cpu[0] |= palette_pbs(&fbi->fb.var);
/* Sequence from 11.7.10 */
LCCR3 = fbi->reg_lccr3;
LCCR2 = fbi->reg_lccr2;
LCCR1 = fbi->reg_lccr1;
LCCR0 = fbi->reg_lccr0 & ~LCCR0_LEN;
DBAR1 = fbi->dbar1;
DBAR2 = fbi->dbar2;
LCCR0 |= LCCR0_LEN;
#ifdef CONFIG_SA1100_GRAPHICSCLIENT
#error Where is GPIO24 set as an output? Can we fit this in somewhere else?
if (machine_is_graphicsclient()) {
// From ADS doc again...same as disable
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(20 * HZ / 1000);
GPSR |= GPIO_GPIO24;
}
#endif
DPRINTK("DBAR1 = %p\n", DBAR1);
DPRINTK("DBAR2 = %p\n", DBAR2);
DPRINTK("LCCR0 = 0x%08x\n", LCCR0);
DPRINTK("LCCR1 = 0x%08x\n", LCCR1);
DPRINTK("LCCR2 = 0x%08x\n", LCCR2);
DPRINTK("LCCR3 = 0x%08x\n", LCCR3);
}
static void sa1100fb_disable_controller(struct sa1100fb_info *fbi)
{
DECLARE_WAITQUEUE(wait, current);
DPRINTK("Disabling LCD controller\n");
#ifdef CONFIG_SA1100_GRAPHICSCLIENT
#error Where is GPIO24 set as an output? Can we fit this in somewhere else?
if (machine_is_graphicsclient()) {
/*
* From ADS internal document:
* GPIO24 should be LOW at least 10msec prior to disabling
* the LCD interface.
*
* We'll wait 20msec.
*/
GPCR |= GPIO_GPIO24;
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(20 * HZ / 1000);
}
#endif
#ifdef CONFIG_SA1100_HUW_WEBPANEL
#error Move me into sa1100fb_power_up_lcd and/or sa1100fb_backlight_on
if (machine_is_huw_webpanel()) {
// dont forget to set the control lines to zero (?)
DPRINTK("ShutDown HuW LCD controller\n");
BCR_clear(BCR_TFT_ENA + BCR_CCFL_POW + BCR_PWM_BACKLIGHT);
}
#endif
add_wait_queue(&fbi->ctrlr_wait, &wait);
set_current_state(TASK_UNINTERRUPTIBLE);
LCSR = 0xffffffff; /* Clear LCD Status Register */
LCCR0 &= ~LCCR0_LDM; /* Enable LCD Disable Done Interrupt */
enable_irq(IRQ_LCD); /* Enable LCD IRQ */
LCCR0 &= ~LCCR0_LEN; /* Disable LCD Controller */
schedule_timeout(20 * HZ / 1000);
current->state = TASK_RUNNING;
remove_wait_queue(&fbi->ctrlr_wait, &wait);
}
/*
* sa1100fb_handle_irq: Handle 'LCD DONE' interrupts.
*/
static void sa1100fb_handle_irq(int irq, void *dev_id, struct pt_regs *regs)
{
struct sa1100fb_info *fbi = dev_id;
unsigned int lcsr = LCSR;
if (lcsr & LCSR_LDD) {
LCCR0 |= LCCR0_LDM;
wake_up(&fbi->ctrlr_wait);
}
LCSR = lcsr;
}
/*
* This function must be called from task context only, since it will
* sleep when disabling the LCD controller, or if we get two contending
* processes trying to alter state.
*/
static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
{
u_int old_state;
down(&fbi->ctrlr_sem);
old_state = fbi->state;
switch (state) {
case C_DISABLE_CLKCHANGE:
/*
* Disable controller for clock change. If the
* controller is already disabled, then do nothing.
*/
if (old_state != C_DISABLE) {
fbi->state = state;
sa1100fb_disable_controller(fbi);
}
break;
case C_DISABLE:
/*
* Disable controller
*/
if (old_state != C_DISABLE) {
fbi->state = state;
sa1100fb_backlight_off(fbi);
if (old_state != C_DISABLE_CLKCHANGE)
sa1100fb_disable_controller(fbi);
sa1100fb_power_down_lcd(fbi);
}
break;
case C_ENABLE_CLKCHANGE:
/*
* Enable the controller after clock change. Only
* do this if we were disabled for the clock change.
*/
if (old_state == C_DISABLE_CLKCHANGE) {
fbi->state = C_ENABLE;
sa1100fb_enable_controller(fbi);
}
break;
case C_REENABLE:
/*
* Re-enable the controller only if it was already
* enabled. This is so we reprogram the control
* registers.
*/
if (old_state == C_ENABLE) {
sa1100fb_disable_controller(fbi);
sa1100fb_setup_gpio(fbi);
sa1100fb_enable_controller(fbi);
}
break;
case C_ENABLE:
/*
* Power up the LCD screen, enable controller, and
* turn on the backlight.
*/
if (old_state != C_ENABLE) {
fbi->state = C_ENABLE;
sa1100fb_setup_gpio(fbi);
sa1100fb_power_up_lcd(fbi);
sa1100fb_enable_controller(fbi);
sa1100fb_backlight_on(fbi);
}
break;
}
up(&fbi->ctrlr_sem);
}
/*
* Our LCD controller task (which is called when we blank or unblank)
* via keventd.
*/
static void sa1100fb_task(void *dummy)
{
struct sa1100fb_info *fbi = dummy;
u_int state = xchg(&fbi->task_state, -1);
set_ctrlr_state(fbi, state);
}
#ifdef CONFIG_CPU_FREQ
/*
* Calculate the minimum DMA period over all displays that we own.
* This, together with the SDRAM bandwidth defines the slowest CPU
* frequency that can be selected.
*/
static unsigned int sa1100fb_min_dma_period(struct sa1100fb_info *fbi)
{
unsigned int min_period = (unsigned int)-1;
int i;
for (i = 0; i < MAX_NR_CONSOLES; i++) {
unsigned int period;
/*
* Do we own this display?
*/
if (fb_display[i].fb_info != &fbi->fb)
continue;
/*
* Ok, calculate its DMA period
*/
period = sa1100fb_display_dma_period(get_con_var(&fbi->fb, i));
if (period < min_period)
min_period = period;
}
return min_period;
}
/*
* CPU clock speed change handler. We need to adjust the LCD timing
* parameters when the CPU clock is adjusted by the power management
* subsystem.
*/
static int
sa1100fb_clkchg_notifier(struct notifier_block *nb, unsigned long val,
void *data)
{
struct sa1100fb_info *fbi = TO_INF(nb, clockchg);
struct cpufreq_minmax *mm = data;
u_int pcd;
switch (val) {
case CPUFREQ_MINMAX:
printk(KERN_DEBUG "min dma period: %d ps, old clock %d kHz, "
"new clock %d kHz\n", sa1100fb_min_dma_period(fbi),
mm->cur_freq, mm->new_freq);
/* todo: fill in min/max values */
break;
case CPUFREQ_PRECHANGE:
set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
break;
case CPUFREQ_POSTCHANGE:
pcd = get_pcd(fbi->fb.var.pixclock);
fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd);
set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
break;
}
return 0;
}
#endif
#ifdef CONFIG_PM
/*
* Power management hook. Note that we won't be called from IRQ context,
* unlike the blank functions above, so we may sleep.
*/
static int
sa1100fb_pm_callback(struct pm_dev *pm_dev, pm_request_t req, void *data)
{
struct sa1100fb_info *fbi = pm_dev->data;
DPRINTK("pm_callback: %d\n", req);
if (req == PM_SUSPEND || req == PM_RESUME) {
int state = (int)data;
if (state == 0) {
/* Enter D0. */
set_ctrlr_state(fbi, C_ENABLE);
} else {
/* Enter D1-D3. Disable the LCD controller. */
set_ctrlr_state(fbi, C_DISABLE);
}
}
DPRINTK("done\n");
return 0;
}
#endif
/*
* sa1100fb_map_video_memory():
* Allocates the DRAM memory for the frame buffer. This buffer is
* remapped into a non-cached, non-buffered, memory region to
* allow palette and pixel writes to occur without flushing the
* cache. Once this area is remapped, all virtual memory
* access to the video memory should occur at the new region.
*/
static int __init sa1100fb_map_video_memory(struct sa1100fb_info *fbi)
{
/*
* We reserve one page for the palette, plus the size
* of the framebuffer.
*/
fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE);
fbi->map_cpu = consistent_alloc(GFP_KERNEL, fbi->map_size,
&fbi->map_dma);
if (fbi->map_cpu) {
fbi->screen_cpu = fbi->map_cpu + PAGE_SIZE;
fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
fbi->fb.fix.smem_start = fbi->screen_dma;
}
return fbi->map_cpu ? 0 : -ENOMEM;
}
/* Fake monspecs to fill in fbinfo structure */
static struct fb_monspecs monspecs __initdata = {
30000, 70000, 50, 65, 0 /* Generic */
};
static struct sa1100fb_info * __init sa1100fb_init_fbinfo(void)
{
struct sa1100fb_mach_info *inf;
struct sa1100fb_info *fbi;
fbi = kmalloc(sizeof(struct sa1100fb_info) + sizeof(struct display) +
sizeof(u16) * 16, GFP_KERNEL);
if (!fbi)
return NULL;
memset(fbi, 0, sizeof(struct sa1100fb_info) + sizeof(struct display));
fbi->currcon = -1;
strcpy(fbi->fb.fix.id, SA1100_NAME);
fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS;
fbi->fb.fix.type_aux = 0;
fbi->fb.fix.xpanstep = 0;
fbi->fb.fix.ypanstep = 0;
fbi->fb.fix.ywrapstep = 0;
fbi->fb.fix.accel = FB_ACCEL_NONE;
fbi->fb.var.nonstd = 0;
fbi->fb.var.activate = FB_ACTIVATE_NOW;
fbi->fb.var.height = -1;
fbi->fb.var.width = -1;
fbi->fb.var.accel_flags = 0;
fbi->fb.var.vmode = FB_VMODE_NONINTERLACED;
strcpy(fbi->fb.modename, SA1100_NAME);
strcpy(fbi->fb.fontname, "Acorn8x8");
fbi->fb.fbops = &sa1100fb_ops;
fbi->fb.changevar = NULL;
fbi->fb.switch_con = sa1100fb_switch;
fbi->fb.updatevar = sa1100fb_updatevar;
fbi->fb.blank = sa1100fb_blank;
fbi->fb.flags = FBINFO_FLAG_DEFAULT;
fbi->fb.node = -1;
fbi->fb.monspecs = monspecs;
fbi->fb.disp = (struct display *)(fbi + 1);
fbi->fb.pseudo_palette = (void *)(fbi->fb.disp + 1);
fbi->rgb[RGB_8] = &rgb_8;
fbi->rgb[RGB_16] = &def_rgb_16;
inf = sa1100fb_get_machine_info(fbi);
fbi->max_xres = inf->xres;
fbi->fb.var.xres = inf->xres;
fbi->fb.var.xres_virtual = inf->xres;
fbi->max_yres = inf->yres;
fbi->fb.var.yres = inf->yres;
fbi->fb.var.yres_virtual = inf->yres;
fbi->max_bpp = inf->bpp;
fbi->fb.var.bits_per_pixel = inf->bpp;
fbi->fb.var.pixclock = inf->pixclock;
fbi->fb.var.hsync_len = inf->hsync_len;
fbi->fb.var.left_margin = inf->left_margin;
fbi->fb.var.right_margin = inf->right_margin;
fbi->fb.var.vsync_len = inf->vsync_len;
fbi->fb.var.upper_margin = inf->upper_margin;
fbi->fb.var.lower_margin = inf->lower_margin;
fbi->fb.var.sync = inf->sync;
fbi->fb.var.grayscale = inf->cmap_greyscale;
fbi->cmap_inverse = inf->cmap_inverse;
fbi->cmap_static = inf->cmap_static;
fbi->lccr0 = inf->lccr0;
fbi->lccr3 = inf->lccr3;
fbi->state = C_DISABLE;
fbi->task_state = (u_char)-1;
fbi->fb.fix.smem_len = fbi->max_xres * fbi->max_yres *
fbi->max_bpp / 8;
init_waitqueue_head(&fbi->ctrlr_wait);
INIT_TQUEUE(&fbi->task, sa1100fb_task, fbi);
init_MUTEX(&fbi->ctrlr_sem);
return fbi;
}
int __init sa1100fb_init(void)
{
struct sa1100fb_info *fbi;
int ret;
fbi = sa1100fb_init_fbinfo();
ret = -ENOMEM;
if (!fbi)
goto failed;
/* Initialize video memory */
ret = sa1100fb_map_video_memory(fbi);
if (ret)
goto failed;
ret = request_irq(IRQ_LCD, sa1100fb_handle_irq, SA_INTERRUPT,
fbi->fb.fix.id, fbi);
if (ret) {
printk(KERN_ERR "sa1100fb: request_irq failed: %d\n", ret);
goto failed;
}
#ifdef ASSABET_PAL_VIDEO
if (machine_is_assabet())
ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
#endif
#ifdef CONFIG_SA1100_FREEBIRD
#error Please move this into sa1100fb_power_up_lcd
if (machine_is_freebird()) {
BCR_set(BCR_FREEBIRD_LCD_DISP);
mdelay(20);
BCR_set(BCR_FREEBIRD_LCD_PWR);
mdelay(20);
}
#endif
sa1100fb_set_var(&fbi->fb.var, -1, &fbi->fb);
ret = register_framebuffer(&fbi->fb);
if (ret < 0)
goto failed;
#ifdef CONFIG_PM
/*
* Note that the console registers this as well, but we want to
* power down the display prior to sleeping.
*/
fbi->pm = pm_register(PM_SYS_DEV, PM_SYS_VGA, sa1100fb_pm_callback);
if (fbi->pm)
fbi->pm->data = fbi;
#endif
#ifdef CONFIG_CPU_FREQ
fbi->clockchg.notifier_call = sa1100fb_clkchg_notifier;
cpufreq_register_notifier(&fbi->clockchg);
#endif
/*
* Ok, now enable the LCD controller
*/
set_ctrlr_state(fbi, C_ENABLE);
/* This driver cannot be unloaded at the moment */
MOD_INC_USE_COUNT;
return 0;
failed:
if (fbi)
kfree(fbi);
return ret;
}
int __init sa1100fb_setup(char *options)
{
#if 0
char *this_opt;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!strncmp(this_opt, "bpp:", 4))
current_par.max_bpp =
simple_strtoul(this_opt + 4, NULL, 0);
if (!strncmp(this_opt, "lccr0:", 6))
lcd_shadow.lccr0 =
simple_strtoul(this_opt + 6, NULL, 0);
if (!strncmp(this_opt, "lccr1:", 6)) {
lcd_shadow.lccr1 =
simple_strtoul(this_opt + 6, NULL, 0);
current_par.max_xres =
(lcd_shadow.lccr1 & 0x3ff) + 16;
}
if (!strncmp(this_opt, "lccr2:", 6)) {
lcd_shadow.lccr2 =
simple_strtoul(this_opt + 6, NULL, 0);
current_par.max_yres =
(lcd_shadow.
lccr0 & LCCR0_SDS) ? ((lcd_shadow.
lccr2 & 0x3ff) +
1) *
2 : ((lcd_shadow.lccr2 & 0x3ff) + 1);
}
if (!strncmp(this_opt, "lccr3:", 6))
lcd_shadow.lccr3 =
simple_strtoul(this_opt + 6, NULL, 0);
}
#endif
return 0;
}
MODULE_DESCRIPTION("StrongARM-1100/1110 framebuffer driver");
MODULE_LICENSE("GPL");
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