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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.
- *
- * - The following must never be specified in a panel definition:
- * LCCR0_LtlEnd, LCCR3_PixClkDiv, LCCR3_VrtSnchL, LCCR3_HorSnchL
- *
- * - The following should be specified:
- * either LCCR0_Color or LCCR0_Mono
- * either LCCR0_Sngl or LCCR0_Dual
- * either LCCR0_Act or LCCR0_Pas
- * either LCCR3_OutEnH or LCCD3_OutEnL
- * either LCCR3_PixRsEdg or LCCR3_PixFlEdg
- * either LCCR3_ACBsDiv or LCCR3_ACBsCntOff
- *
- * 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@fluxnic.net>
- * - 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
- * memset.
- * - 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/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/mm.h>
- #include <linux/fb.h>
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <linux/ioport.h>
- #include <linux/cpufreq.h>
- #include <linux/platform_device.h>
- #include <linux/dma-mapping.h>
- #include <linux/mutex.h>
- #include <linux/io.h>
- #include <mach/hardware.h>
- #include <asm/mach-types.h>
- #include <mach/assabet.h>
- #include <mach/shannon.h>
- /*
- * debugging?
- */
- #define DEBUG 0
- /*
- * Complain if VAR is out of range.
- */
- #define DEBUG_VAR 1
- #undef ASSABET_PAL_VIDEO
- #include "sa1100fb.h"
- extern void (*sa1100fb_backlight_power)(int on);
- extern void (*sa1100fb_lcd_power)(int on);
- static struct sa1100fb_rgb rgb_4 = {
- .red = { .offset = 0, .length = 4, },
- .green = { .offset = 0, .length = 4, },
- .blue = { .offset = 0, .length = 4, },
- .transp = { .offset = 0, .length = 0, },
- };
- static struct sa1100fb_rgb rgb_8 = {
- .red = { .offset = 0, .length = 8, },
- .green = { .offset = 0, .length = 8, },
- .blue = { .offset = 0, .length = 8, },
- .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,
- .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 = {
- .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,
- .cmap_static = 1,
- .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
- .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
- };
- 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_H3100
- static struct sa1100fb_mach_info h3100_info __initdata = {
- .pixclock = 406977, .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_inverse = 1,
- .lccr0 = LCCR0_Mono | LCCR0_4PixMono | LCCR0_Sngl | LCCR0_Pas,
- .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
- };
- #endif
- #ifdef CONFIG_SA1100_COLLIE
- static struct sa1100fb_mach_info collie_info __initdata = {
- .pixclock = 171521, .bpp = 16,
- .xres = 320, .yres = 240,
- .hsync_len = 5, .vsync_len = 1,
- .left_margin = 11, .upper_margin = 2,
- .right_margin = 30, .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),
- };
- #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,
- .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,
- .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
- .lccr3 = LCCR3_OutEnH | LCCR3_PixFlEdg
- };
- #endif
- #ifdef CONFIG_SA1100_SHANNON
- static struct sa1100fb_mach_info shannon_info __initdata = {
- .pixclock = 152500, .bpp = 8,
- .xres = 640, .yres = 480,
- .hsync_len = 4, .vsync_len = 3,
- .left_margin = 2, .upper_margin = 0,
- .right_margin = 1, .lower_margin = 0,
- .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
- .lccr0 = LCCR0_Color | LCCR0_Dual | LCCR0_Pas,
- .lccr3 = LCCR3_ACBsDiv(512),
- };
- #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_H3100
- if (machine_is_h3100()) {
- inf = &h3100_info;
- }
- #endif
- #ifdef CONFIG_SA1100_H3600
- if (machine_is_h3600()) {
- inf = &h3600_info;
- fbi->rgb[RGB_16] = &h3600_rgb_16;
- }
- #endif
- #ifdef CONFIG_SA1100_COLLIE
- if (machine_is_collie()) {
- inf = &collie_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_SHANNON
- if (machine_is_shannon()) {
- inf = &shannon_info;
- }
- #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_work(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_work(&fbi->task);
- }
- local_irq_restore(flags);
- }
- 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) {
- case 4: ret = 0 << 12; break;
- case 8: ret = 1 << 12; break;
- case 16: ret = 2 << 12; break;
- }
- 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;
- unsigned 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 (fbi->cmap_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.fix.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) {
- u32 *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;
- }
- #ifdef CONFIG_CPU_FREQ
- /*
- * sa1100fb_display_dma_period()
- * Calculate the minimum period (in picoseconds) between two DMA
- * requests for the LCD controller. If we hit this, it means we're
- * doing nothing but LCD DMA.
- */
- static inline unsigned int sa1100fb_display_dma_period(struct fb_var_screeninfo *var)
- {
- /*
- * Period = pixclock * bits_per_byte * bytes_per_transfer
- * / memory_bits_per_pixel;
- */
- return var->pixclock * 8 * 16 / var->bits_per_pixel;
- }
- #endif
- /*
- * sa1100fb_check_var():
- * 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_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
- {
- struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
- int rgbidx;
- 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 = max(var->xres_virtual, var->xres);
- var->yres_virtual = max(var->yres_virtual, var->yres);
- DPRINTK("var->bits_per_pixel=%d\n", var->bits_per_pixel);
- switch (var->bits_per_pixel) {
- case 4:
- rgbidx = RGB_4;
- break;
- case 8:
- rgbidx = RGB_8;
- break;
- case 16:
- rgbidx = RGB_16;
- break;
- default:
- return -EINVAL;
- }
- /*
- * Copy the RGB parameters for this display
- * from the machine specific parameters.
- */
- var->red = fbi->rgb[rgbidx]->red;
- var->green = fbi->rgb[rgbidx]->green;
- var->blue = fbi->rgb[rgbidx]->blue;
- var->transp = fbi->rgb[rgbidx]->transp;
- DPRINTK("RGBT length = %d:%d:%d:%d\n",
- var->red.length, var->green.length, var->blue.length,
- var->transp.length);
- DPRINTK("RGBT offset = %d:%d:%d:%d\n",
- var->red.offset, var->green.offset, var->blue.offset,
- var->transp.offset);
- #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 0;
- }
- static inline void sa1100fb_set_truecolor(u_int 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
- }
- }
- /*
- * sa1100fb_set_par():
- * Set the user defined part of the display for the specified console
- */
- static int sa1100fb_set_par(struct fb_info *info)
- {
- struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
- struct fb_var_screeninfo *var = &info->var;
- unsigned long palette_mem_size;
- DPRINTK("set_par\n");
- if (var->bits_per_pixel == 16)
- fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
- else if (!fbi->cmap_static)
- fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
- else {
- /*
- * Some people have weird ideas about wanting static
- * pseudocolor maps. I suspect their user space
- * applications are broken.
- */
- fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
- }
- fbi->fb.fix.line_length = var->xres_virtual *
- var->bits_per_pixel / 8;
- 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;
- /*
- * Set (any) board control register to handle new color depth
- */
- sa1100fb_set_truecolor(fbi->fb.fix.visual == FB_VISUAL_TRUECOLOR);
- sa1100fb_activate_var(var, fbi);
- return 0;
- }
- #if 0
- static int
- sa1100fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
- {
- struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
- /*
- * Make sure the user isn't doing something stupid.
- */
- if (!kspc && (fbi->fb.var.bits_per_pixel == 16 || fbi->cmap_static))
- return -EINVAL;
- return gen_set_cmap(cmap, kspc, con, info);
- }
- #endif
- /*
- * 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 int sa1100fb_blank(int blank, struct fb_info *info)
- {
- struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
- int i;
- DPRINTK("sa1100fb_blank: blank=%d\n", blank);
- switch (blank) {
- case FB_BLANK_POWERDOWN:
- case FB_BLANK_VSYNC_SUSPEND:
- case FB_BLANK_HSYNC_SUSPEND:
- case FB_BLANK_NORMAL:
- if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
- fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
- for (i = 0; i < fbi->palette_size; i++)
- sa1100fb_setpalettereg(i, 0, 0, 0, 0, info);
- sa1100fb_schedule_work(fbi, C_DISABLE);
- break;
- case FB_BLANK_UNBLANK:
- if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
- fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
- fb_set_cmap(&fbi->fb.cmap, info);
- sa1100fb_schedule_work(fbi, C_ENABLE);
- }
- return 0;
- }
- static int sa1100fb_mmap(struct fb_info *info,
- struct vm_area_struct *vma)
- {
- struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
- unsigned long start, len, off = vma->vm_pgoff << PAGE_SHIFT;
- if (off < info->fix.smem_len) {
- vma->vm_pgoff += 1; /* skip over the palette */
- return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu,
- fbi->map_dma, fbi->map_size);
- }
- start = info->fix.mmio_start;
- len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
- if ((vma->vm_end - vma->vm_start + off) > len)
- return -EINVAL;
- off += start & PAGE_MASK;
- vma->vm_pgoff = off >> PAGE_SHIFT;
- vma->vm_flags |= VM_IO;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- return io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot);
- }
- static struct fb_ops sa1100fb_ops = {
- .owner = THIS_MODULE,
- .fb_check_var = sa1100fb_check_var,
- .fb_set_par = sa1100fb_set_par,
- // .fb_set_cmap = sa1100fb_set_cmap,
- .fb_setcolreg = sa1100fb_setcolreg,
- .fb_fillrect = cfb_fillrect,
- .fb_copyarea = cfb_copyarea,
- .fb_imageblit = cfb_imageblit,
- .fb_blank = sa1100fb_blank,
- .fb_mmap = sa1100fb_mmap,
- };
- /*
- * Calculate the PCD value from the clock rate (in picoseconds).
- * We take account of the PPCR clock setting.
- */
- static inline unsigned int get_pcd(unsigned int pixclock, unsigned int cpuclock)
- {
- unsigned int pcd = cpuclock / 100;
- pcd *= pixclock;
- pcd /= 10000000;
- return pcd + 1; /* make up for integer math truncations */
- }
- /*
- * 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;
- 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);
- pcd = get_pcd(var->pixclock, cpufreq_get(0));
- new_regs.lccr3 = LCCR3_PixClkDiv(pcd) | fbi->lccr3 |
- (var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) |
- (var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL);
- DPRINTK("nlccr0 = 0x%08lx\n", new_regs.lccr0);
- DPRINTK("nlccr1 = 0x%08lx\n", new_regs.lccr1);
- DPRINTK("nlccr2 = 0x%08lx\n", new_regs.lccr2);
- DPRINTK("nlccr3 = 0x%08lx\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_work(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
- */
- static inline void __sa1100fb_backlight_power(struct sa1100fb_info *fbi, int on)
- {
- DPRINTK("backlight o%s\n", on ? "n" : "ff");
- if (sa1100fb_backlight_power)
- sa1100fb_backlight_power(on);
- }
- static inline void __sa1100fb_lcd_power(struct sa1100fb_info *fbi, int on)
- {
- DPRINTK("LCD power o%s\n", on ? "n" : "ff");
- if (sa1100fb_lcd_power)
- sa1100fb_lcd_power(on);
- }
- 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;
- }
- 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;
- if (machine_is_shannon()) {
- GPDR |= SHANNON_GPIO_DISP_EN;
- GPSR |= SHANNON_GPIO_DISP_EN;
- }
- DPRINTK("DBAR1 = 0x%08x\n", DBAR1);
- DPRINTK("DBAR2 = 0x%08x\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");
- if (machine_is_shannon()) {
- GPCR |= SHANNON_GPIO_DISP_EN;
- }
- set_current_state(TASK_UNINTERRUPTIBLE);
- add_wait_queue(&fbi->ctrlr_wait, &wait);
- LCSR = 0xffffffff; /* Clear LCD Status Register */
- LCCR0 &= ~LCCR0_LDM; /* Enable LCD Disable Done Interrupt */
- LCCR0 &= ~LCCR0_LEN; /* Disable LCD Controller */
- schedule_timeout(20 * HZ / 1000);
- remove_wait_queue(&fbi->ctrlr_wait, &wait);
- }
- /*
- * sa1100fb_handle_irq: Handle 'LCD DONE' interrupts.
- */
- static irqreturn_t sa1100fb_handle_irq(int irq, void *dev_id)
- {
- struct sa1100fb_info *fbi = dev_id;
- unsigned int lcsr = LCSR;
- if (lcsr & LCSR_LDD) {
- LCCR0 |= LCCR0_LDM;
- wake_up(&fbi->ctrlr_wait);
- }
- LCSR = lcsr;
- return IRQ_HANDLED;
- }
- /*
- * 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;
- mutex_lock(&fbi->ctrlr_lock);
- old_state = fbi->state;
- /*
- * Hack around fbcon initialisation.
- */
- if (old_state == C_STARTUP && state == C_REENABLE)
- state = C_ENABLE;
- 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 && old_state != C_DISABLE_PM) {
- fbi->state = state;
- sa1100fb_disable_controller(fbi);
- }
- break;
- case C_DISABLE_PM:
- case C_DISABLE:
- /*
- * Disable controller
- */
- if (old_state != C_DISABLE) {
- fbi->state = state;
- __sa1100fb_backlight_power(fbi, 0);
- if (old_state != C_DISABLE_CLKCHANGE)
- sa1100fb_disable_controller(fbi);
- __sa1100fb_lcd_power(fbi, 0);
- }
- 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_PM:
- /*
- * Re-enable the controller after PM. This is not
- * perfect - think about the case where we were doing
- * a clock change, and we suspended half-way through.
- */
- if (old_state != C_DISABLE_PM)
- break;
- /* fall through */
- 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_lcd_power(fbi, 1);
- sa1100fb_enable_controller(fbi);
- __sa1100fb_backlight_power(fbi, 1);
- }
- break;
- }
- mutex_unlock(&fbi->ctrlr_lock);
- }
- /*
- * Our LCD controller task (which is called when we blank or unblank)
- * via keventd.
- */
- static void sa1100fb_task(struct work_struct *w)
- {
- struct sa1100fb_info *fbi = container_of(w, struct sa1100fb_info, task);
- 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)
- {
- #if 0
- unsigned int min_period = (unsigned int)-1;
- int i;
- for (i = 0; i < MAX_NR_CONSOLES; i++) {
- struct display *disp = &fb_display[i];
- unsigned int period;
- /*
- * Do we own this display?
- */
- if (disp->fb_info != &fbi->fb)
- continue;
- /*
- * Ok, calculate its DMA period
- */
- period = sa1100fb_display_dma_period(&disp->var);
- if (period < min_period)
- min_period = period;
- }
- return min_period;
- #else
- /*
- * FIXME: we need to verify _all_ consoles.
- */
- return sa1100fb_display_dma_period(&fbi->fb.var);
- #endif
- }
- /*
- * 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_freq_transition(struct notifier_block *nb, unsigned long val,
- void *data)
- {
- struct sa1100fb_info *fbi = TO_INF(nb, freq_transition);
- struct cpufreq_freqs *f = data;
- u_int pcd;
- switch (val) {
- case CPUFREQ_PRECHANGE:
- set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
- break;
- case CPUFREQ_POSTCHANGE:
- pcd = get_pcd(fbi->fb.var.pixclock, f->new);
- fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd);
- set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
- break;
- }
- return 0;
- }
- static int
- sa1100fb_freq_policy(struct notifier_block *nb, unsigned long val,
- void *data)
- {
- struct sa1100fb_info *fbi = TO_INF(nb, freq_policy);
- struct cpufreq_policy *policy = data;
- switch (val) {
- case CPUFREQ_ADJUST:
- case CPUFREQ_INCOMPATIBLE:
- printk(KERN_DEBUG "min dma period: %d ps, "
- "new clock %d kHz\n", sa1100fb_min_dma_period(fbi),
- policy->max);
- /* todo: fill in min/max values */
- break;
- case CPUFREQ_NOTIFY:
- do {} while(0);
- /* todo: panic if min/max values aren't fulfilled
- * [can't really happen unless there's a bug in the
- * CPU policy verififcation process *
- */
- break;
- }
- return 0;
- }
- #endif
- #ifdef CONFIG_PM
- /*
- * Power management hooks. Note that we won't be called from IRQ context,
- * unlike the blank functions above, so we may sleep.
- */
- static int sa1100fb_suspend(struct platform_device *dev, pm_message_t state)
- {
- struct sa1100fb_info *fbi = platform_get_drvdata(dev);
- set_ctrlr_state(fbi, C_DISABLE_PM);
- return 0;
- }
- static int sa1100fb_resume(struct platform_device *dev)
- {
- struct sa1100fb_info *fbi = platform_get_drvdata(dev);
- set_ctrlr_state(fbi, C_ENABLE_PM);
- return 0;
- }
- #else
- #define sa1100fb_suspend NULL
- #define sa1100fb_resume NULL
- #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 = dma_alloc_writecombine(fbi->dev, fbi->map_size,
- &fbi->map_dma, GFP_KERNEL);
- if (fbi->map_cpu) {
- fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE;
- fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
- /*
- * FIXME: this is actually the wrong thing to place in
- * smem_start. But fbdev suffers from the problem that
- * it needs an API which doesn't exist (in this case,
- * dma_writecombine_mmap)
- */
- 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 = {
- .hfmin = 30000,
- .hfmax = 70000,
- .vfmin = 50,
- .vfmax = 65,
- };
- static struct sa1100fb_info * __init sa1100fb_init_fbinfo(struct device *dev)
- {
- struct sa1100fb_mach_info *inf;
- struct sa1100fb_info *fbi;
- fbi = kmalloc(sizeof(struct sa1100fb_info) + sizeof(u32) * 16,
- GFP_KERNEL);
- if (!fbi)
- return NULL;
- memset(fbi, 0, sizeof(struct sa1100fb_info));
- fbi->dev = dev;
- 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;
- fbi->fb.fbops = &sa1100fb_ops;
- fbi->fb.flags = FBINFO_DEFAULT;
- fbi->fb.monspecs = monspecs;
- fbi->fb.pseudo_palette = (fbi + 1);
- fbi->rgb[RGB_4] = &rgb_4;
- fbi->rgb[RGB_8] = &rgb_8;
- fbi->rgb[RGB_16] = &def_rgb_16;
- inf = sa1100fb_get_machine_info(fbi);
- /*
- * People just don't seem to get this. We don't support
- * anything but correct entries now, so panic if someone
- * does something stupid.
- */
- if (inf->lccr3 & (LCCR3_VrtSnchL|LCCR3_HorSnchL|0xff) ||
- inf->pixclock == 0)
- panic("sa1100fb error: invalid LCCR3 fields set or zero "
- "pixclock.");
- 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_STARTUP;
- 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_WORK(&fbi->task, sa1100fb_task);
- mutex_init(&fbi->ctrlr_lock);
- return fbi;
- }
- static int __devinit sa1100fb_probe(struct platform_device *pdev)
- {
- struct sa1100fb_info *fbi;
- int ret, irq;
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return -EINVAL;
- if (!request_mem_region(0xb0100000, 0x10000, "LCD"))
- return -EBUSY;
- fbi = sa1100fb_init_fbinfo(&pdev->dev);
- ret = -ENOMEM;
- if (!fbi)
- goto failed;
- /* Initialize video memory */
- ret = sa1100fb_map_video_memory(fbi);
- if (ret)
- goto failed;
- ret = request_irq(irq, sa1100fb_handle_irq, IRQF_DISABLED,
- "LCD", 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
- /*
- * This makes sure that our colour bitfield
- * descriptors are correctly initialised.
- */
- sa1100fb_check_var(&fbi->fb.var, &fbi->fb);
- platform_set_drvdata(pdev, fbi);
- ret = register_framebuffer(&fbi->fb);
- if (ret < 0)
- goto err_free_irq;
- #ifdef CONFIG_CPU_FREQ
- fbi->freq_transition.notifier_call = sa1100fb_freq_transition;
- fbi->freq_policy.notifier_call = sa1100fb_freq_policy;
- cpufreq_register_notifier(&fbi->freq_transition, CPUFREQ_TRANSITION_NOTIFIER);
- cpufreq_register_notifier(&fbi->freq_policy, CPUFREQ_POLICY_NOTIFIER);
- #endif
- /* This driver cannot be unloaded at the moment */
- return 0;
- err_free_irq:
- free_irq(irq, fbi);
- failed:
- platform_set_drvdata(pdev, NULL);
- kfree(fbi);
- release_mem_region(0xb0100000, 0x10000);
- return ret;
- }
- static struct platform_driver sa1100fb_driver = {
- .probe = sa1100fb_probe,
- .suspend = sa1100fb_suspend,
- .resume = sa1100fb_resume,
- .driver = {
- .name = "sa11x0-fb",
- },
- };
- int __init sa1100fb_init(void)
- {
- if (fb_get_options("sa1100fb", NULL))
- return -ENODEV;
- return platform_driver_register(&sa1100fb_driver);
- }
- 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_init(sa1100fb_init);
- MODULE_DESCRIPTION("StrongARM-1100/1110 framebuffer driver");
- MODULE_LICENSE("GPL");
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