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linux-next/drivers/video/i810/i810_main.c
Krzysztof Helt 0c8ddf7f8b i810fb: fix regression with uninitalized fb_info->mm_lock mutex 
Remove redundant call to the encode_fix() before i810 frambuffer is
registered.

This fixes a problem with uninitialized the fb_info->mm_lock mutex
introduced by the commit 537a1bf059 " fbdev: add mutex for fb_mmap
locking"

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-08 09:19:49 -07:00

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/*-*- linux-c -*-
* linux/drivers/video/i810_main.c -- Intel 810 frame buffer device
*
* Copyright (C) 2001 Antonino Daplas<adaplas@pol.net>
* All Rights Reserved
*
* Contributors:
* Michael Vogt <mvogt@acm.org> - added support for Intel 815 chipsets
* and enabling the power-on state of
* external VGA connectors for
* secondary displays
*
* Fredrik Andersson <krueger@shell.linux.se> - alpha testing of
* the VESA GTF
*
* Brad Corrion <bcorrion@web-co.com> - alpha testing of customized
* timings support
*
* The code framework is a modification of vfb.c by Geert Uytterhoeven.
* DotClock and PLL calculations are partly based on i810_driver.c
* in xfree86 v4.0.3 by Precision Insight.
* Watermark calculation and tables are based on i810_wmark.c
* in xfre86 v4.0.3 by Precision Insight. Slight modifications
* only to allow for integer operations instead of floating point.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/resource.h>
#include <linux/unistd.h>
#include <linux/console.h>
#include <asm/io.h>
#include <asm/div64.h>
#include <asm/page.h>
#include "i810_regs.h"
#include "i810.h"
#include "i810_main.h"
/*
* voffset - framebuffer offset in MiB from aperture start address. In order for
* the driver to work with X, we must try to use memory holes left untouched by X. The
* following table lists where X's different surfaces start at.
*
* ---------------------------------------------
* : : 64 MiB : 32 MiB :
* ----------------------------------------------
* : FrontBuffer : 0 : 0 :
* : DepthBuffer : 48 : 16 :
* : BackBuffer : 56 : 24 :
* ----------------------------------------------
*
* So for chipsets with 64 MiB Aperture sizes, 32 MiB for v_offset is okay, allowing up to
* 15 + 1 MiB of Framebuffer memory. For 32 MiB Aperture sizes, a v_offset of 8 MiB should
* work, allowing 7 + 1 MiB of Framebuffer memory.
* Note, the size of the hole may change depending on how much memory you allocate to X,
* and how the memory is split up between these surfaces.
*
* Note: Anytime the DepthBuffer or FrontBuffer is overlapped, X would still run but with
* DRI disabled. But if the Frontbuffer is overlapped, X will fail to load.
*
* Experiment with v_offset to find out which works best for you.
*/
static u32 v_offset_default __devinitdata; /* For 32 MiB Aper size, 8 should be the default */
static u32 voffset __devinitdata;
static int i810fb_cursor(struct fb_info *info, struct fb_cursor *cursor);
static int __devinit i810fb_init_pci (struct pci_dev *dev,
const struct pci_device_id *entry);
static void __exit i810fb_remove_pci(struct pci_dev *dev);
static int i810fb_resume(struct pci_dev *dev);
static int i810fb_suspend(struct pci_dev *dev, pm_message_t state);
/* Chipset Specific Functions */
static int i810fb_set_par (struct fb_info *info);
static int i810fb_getcolreg (u8 regno, u8 *red, u8 *green, u8 *blue,
u8 *transp, struct fb_info *info);
static int i810fb_setcolreg (unsigned regno, unsigned red, unsigned green, unsigned blue,
unsigned transp, struct fb_info *info);
static int i810fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info);
static int i810fb_blank (int blank_mode, struct fb_info *info);
/* Initialization */
static void i810fb_release_resource (struct fb_info *info, struct i810fb_par *par);
/* PCI */
static const char *i810_pci_list[] __devinitdata = {
"Intel(R) 810 Framebuffer Device" ,
"Intel(R) 810-DC100 Framebuffer Device" ,
"Intel(R) 810E Framebuffer Device" ,
"Intel(R) 815 (Internal Graphics 100Mhz FSB) Framebuffer Device" ,
"Intel(R) 815 (Internal Graphics only) Framebuffer Device" ,
"Intel(R) 815 (Internal Graphics with AGP) Framebuffer Device"
};
static struct pci_device_id i810fb_pci_tbl[] = {
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82810_IG1,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82810_IG3,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82810E_IG,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 },
/* mvo: added i815 PCI-ID */
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82815_100,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3 },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82815_NOAGP,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82815_CGC,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 },
{ 0 },
};
static struct pci_driver i810fb_driver = {
.name = "i810fb",
.id_table = i810fb_pci_tbl,
.probe = i810fb_init_pci,
.remove = __exit_p(i810fb_remove_pci),
.suspend = i810fb_suspend,
.resume = i810fb_resume,
};
static char *mode_option __devinitdata = NULL;
static int vram __devinitdata = 4;
static int bpp __devinitdata = 8;
static int mtrr __devinitdata;
static int accel __devinitdata;
static int hsync1 __devinitdata;
static int hsync2 __devinitdata;
static int vsync1 __devinitdata;
static int vsync2 __devinitdata;
static int xres __devinitdata;
static int yres;
static int vyres __devinitdata;
static int sync __devinitdata;
static int extvga __devinitdata;
static int dcolor __devinitdata;
static int ddc3 __devinitdata = 2;
/*------------------------------------------------------------*/
/**************************************************************
* Hardware Low Level Routines *
**************************************************************/
/**
* i810_screen_off - turns off/on display
* @mmio: address of register space
* @mode: on or off
*
* DESCRIPTION:
* Blanks/unblanks the display
*/
static void i810_screen_off(u8 __iomem *mmio, u8 mode)
{
u32 count = WAIT_COUNT;
u8 val;
i810_writeb(SR_INDEX, mmio, SR01);
val = i810_readb(SR_DATA, mmio);
val = (mode == OFF) ? val | SCR_OFF :
val & ~SCR_OFF;
while((i810_readw(DISP_SL, mmio) & 0xFFF) && count--);
i810_writeb(SR_INDEX, mmio, SR01);
i810_writeb(SR_DATA, mmio, val);
}
/**
* i810_dram_off - turns off/on dram refresh
* @mmio: address of register space
* @mode: on or off
*
* DESCRIPTION:
* Turns off DRAM refresh. Must be off for only 2 vsyncs
* before data becomes corrupt
*/
static void i810_dram_off(u8 __iomem *mmio, u8 mode)
{
u8 val;
val = i810_readb(DRAMCH, mmio);
val &= DRAM_OFF;
val = (mode == OFF) ? val : val | DRAM_ON;
i810_writeb(DRAMCH, mmio, val);
}
/**
* i810_protect_regs - allows rw/ro mode of certain VGA registers
* @mmio: address of register space
* @mode: protect/unprotect
*
* DESCRIPTION:
* The IBM VGA standard allows protection of certain VGA registers.
* This will protect or unprotect them.
*/
static void i810_protect_regs(u8 __iomem *mmio, int mode)
{
u8 reg;
i810_writeb(CR_INDEX_CGA, mmio, CR11);
reg = i810_readb(CR_DATA_CGA, mmio);
reg = (mode == OFF) ? reg & ~0x80 :
reg | 0x80;
i810_writeb(CR_INDEX_CGA, mmio, CR11);
i810_writeb(CR_DATA_CGA, mmio, reg);
}
/**
* i810_load_pll - loads values for the hardware PLL clock
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Loads the P, M, and N registers.
*/
static void i810_load_pll(struct i810fb_par *par)
{
u32 tmp1, tmp2;
u8 __iomem *mmio = par->mmio_start_virtual;
tmp1 = par->regs.M | par->regs.N << 16;
tmp2 = i810_readl(DCLK_2D, mmio);
tmp2 &= ~MN_MASK;
i810_writel(DCLK_2D, mmio, tmp1 | tmp2);
tmp1 = par->regs.P;
tmp2 = i810_readl(DCLK_0DS, mmio);
tmp2 &= ~(P_OR << 16);
i810_writel(DCLK_0DS, mmio, (tmp1 << 16) | tmp2);
i810_writeb(MSR_WRITE, mmio, par->regs.msr | 0xC8 | 1);
}
/**
* i810_load_vga - load standard VGA registers
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Load values to VGA registers
*/
static void i810_load_vga(struct i810fb_par *par)
{
u8 __iomem *mmio = par->mmio_start_virtual;
/* interlace */
i810_writeb(CR_INDEX_CGA, mmio, CR70);
i810_writeb(CR_DATA_CGA, mmio, par->interlace);
i810_writeb(CR_INDEX_CGA, mmio, CR00);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr00);
i810_writeb(CR_INDEX_CGA, mmio, CR01);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr01);
i810_writeb(CR_INDEX_CGA, mmio, CR02);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr02);
i810_writeb(CR_INDEX_CGA, mmio, CR03);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr03);
i810_writeb(CR_INDEX_CGA, mmio, CR04);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr04);
i810_writeb(CR_INDEX_CGA, mmio, CR05);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr05);
i810_writeb(CR_INDEX_CGA, mmio, CR06);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr06);
i810_writeb(CR_INDEX_CGA, mmio, CR09);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr09);
i810_writeb(CR_INDEX_CGA, mmio, CR10);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr10);
i810_writeb(CR_INDEX_CGA, mmio, CR11);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr11);
i810_writeb(CR_INDEX_CGA, mmio, CR12);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr12);
i810_writeb(CR_INDEX_CGA, mmio, CR15);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr15);
i810_writeb(CR_INDEX_CGA, mmio, CR16);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr16);
}
/**
* i810_load_vgax - load extended VGA registers
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Load values to extended VGA registers
*/
static void i810_load_vgax(struct i810fb_par *par)
{
u8 __iomem *mmio = par->mmio_start_virtual;
i810_writeb(CR_INDEX_CGA, mmio, CR30);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr30);
i810_writeb(CR_INDEX_CGA, mmio, CR31);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr31);
i810_writeb(CR_INDEX_CGA, mmio, CR32);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr32);
i810_writeb(CR_INDEX_CGA, mmio, CR33);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr33);
i810_writeb(CR_INDEX_CGA, mmio, CR35);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr35);
i810_writeb(CR_INDEX_CGA, mmio, CR39);
i810_writeb(CR_DATA_CGA, mmio, par->regs.cr39);
}
/**
* i810_load_2d - load grahics registers
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Load values to graphics registers
*/
static void i810_load_2d(struct i810fb_par *par)
{
u32 tmp;
u8 tmp8;
u8 __iomem *mmio = par->mmio_start_virtual;
i810_writel(FW_BLC, mmio, par->watermark);
tmp = i810_readl(PIXCONF, mmio);
tmp |= 1 | 1 << 20;
i810_writel(PIXCONF, mmio, tmp);
i810_writel(OVRACT, mmio, par->ovract);
i810_writeb(GR_INDEX, mmio, GR10);
tmp8 = i810_readb(GR_DATA, mmio);
tmp8 |= 2;
i810_writeb(GR_INDEX, mmio, GR10);
i810_writeb(GR_DATA, mmio, tmp8);
}
/**
* i810_hires - enables high resolution mode
* @mmio: address of register space
*/
static void i810_hires(u8 __iomem *mmio)
{
u8 val;
i810_writeb(CR_INDEX_CGA, mmio, CR80);
val = i810_readb(CR_DATA_CGA, mmio);
i810_writeb(CR_INDEX_CGA, mmio, CR80);
i810_writeb(CR_DATA_CGA, mmio, val | 1);
/* Stop LCD displays from flickering */
i810_writel(MEM_MODE, mmio, i810_readl(MEM_MODE, mmio) | 4);
}
/**
* i810_load_pitch - loads the characters per line of the display
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Loads the characters per line
*/
static void i810_load_pitch(struct i810fb_par *par)
{
u32 tmp, pitch;
u8 val;
u8 __iomem *mmio = par->mmio_start_virtual;
pitch = par->pitch >> 3;
i810_writeb(SR_INDEX, mmio, SR01);
val = i810_readb(SR_DATA, mmio);
val &= 0xE0;
val |= 1 | 1 << 2;
i810_writeb(SR_INDEX, mmio, SR01);
i810_writeb(SR_DATA, mmio, val);
tmp = pitch & 0xFF;
i810_writeb(CR_INDEX_CGA, mmio, CR13);
i810_writeb(CR_DATA_CGA, mmio, (u8) tmp);
tmp = pitch >> 8;
i810_writeb(CR_INDEX_CGA, mmio, CR41);
val = i810_readb(CR_DATA_CGA, mmio) & ~0x0F;
i810_writeb(CR_INDEX_CGA, mmio, CR41);
i810_writeb(CR_DATA_CGA, mmio, (u8) tmp | val);
}
/**
* i810_load_color - loads the color depth of the display
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Loads the color depth of the display and the graphics engine
*/
static void i810_load_color(struct i810fb_par *par)
{
u8 __iomem *mmio = par->mmio_start_virtual;
u32 reg1;
u16 reg2;
reg1 = i810_readl(PIXCONF, mmio) & ~(0xF0000 | 1 << 27);
reg2 = i810_readw(BLTCNTL, mmio) & ~0x30;
reg1 |= 0x8000 | par->pixconf;
reg2 |= par->bltcntl;
i810_writel(PIXCONF, mmio, reg1);
i810_writew(BLTCNTL, mmio, reg2);
}
/**
* i810_load_regs - loads all registers for the mode
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Loads registers
*/
static void i810_load_regs(struct i810fb_par *par)
{
u8 __iomem *mmio = par->mmio_start_virtual;
i810_screen_off(mmio, OFF);
i810_protect_regs(mmio, OFF);
i810_dram_off(mmio, OFF);
i810_load_pll(par);
i810_load_vga(par);
i810_load_vgax(par);
i810_dram_off(mmio, ON);
i810_load_2d(par);
i810_hires(mmio);
i810_screen_off(mmio, ON);
i810_protect_regs(mmio, ON);
i810_load_color(par);
i810_load_pitch(par);
}
static void i810_write_dac(u8 regno, u8 red, u8 green, u8 blue,
u8 __iomem *mmio)
{
i810_writeb(CLUT_INDEX_WRITE, mmio, regno);
i810_writeb(CLUT_DATA, mmio, red);
i810_writeb(CLUT_DATA, mmio, green);
i810_writeb(CLUT_DATA, mmio, blue);
}
static void i810_read_dac(u8 regno, u8 *red, u8 *green, u8 *blue,
u8 __iomem *mmio)
{
i810_writeb(CLUT_INDEX_READ, mmio, regno);
*red = i810_readb(CLUT_DATA, mmio);
*green = i810_readb(CLUT_DATA, mmio);
*blue = i810_readb(CLUT_DATA, mmio);
}
/************************************************************
* VGA State Restore *
************************************************************/
static void i810_restore_pll(struct i810fb_par *par)
{
u32 tmp1, tmp2;
u8 __iomem *mmio = par->mmio_start_virtual;
tmp1 = par->hw_state.dclk_2d;
tmp2 = i810_readl(DCLK_2D, mmio);
tmp1 &= ~MN_MASK;
tmp2 &= MN_MASK;
i810_writel(DCLK_2D, mmio, tmp1 | tmp2);
tmp1 = par->hw_state.dclk_1d;
tmp2 = i810_readl(DCLK_1D, mmio);
tmp1 &= ~MN_MASK;
tmp2 &= MN_MASK;
i810_writel(DCLK_1D, mmio, tmp1 | tmp2);
i810_writel(DCLK_0DS, mmio, par->hw_state.dclk_0ds);
}
static void i810_restore_dac(struct i810fb_par *par)
{
u32 tmp1, tmp2;
u8 __iomem *mmio = par->mmio_start_virtual;
tmp1 = par->hw_state.pixconf;
tmp2 = i810_readl(PIXCONF, mmio);
tmp1 &= DAC_BIT;
tmp2 &= ~DAC_BIT;
i810_writel(PIXCONF, mmio, tmp1 | tmp2);
}
static void i810_restore_vgax(struct i810fb_par *par)
{
u8 i, j;
u8 __iomem *mmio = par->mmio_start_virtual;
for (i = 0; i < 4; i++) {
i810_writeb(CR_INDEX_CGA, mmio, CR30+i);
i810_writeb(CR_DATA_CGA, mmio, *(&(par->hw_state.cr30) + i));
}
i810_writeb(CR_INDEX_CGA, mmio, CR35);
i810_writeb(CR_DATA_CGA, mmio, par->hw_state.cr35);
i810_writeb(CR_INDEX_CGA, mmio, CR39);
i810_writeb(CR_DATA_CGA, mmio, par->hw_state.cr39);
i810_writeb(CR_INDEX_CGA, mmio, CR41);
i810_writeb(CR_DATA_CGA, mmio, par->hw_state.cr39);
/*restore interlace*/
i810_writeb(CR_INDEX_CGA, mmio, CR70);
i = par->hw_state.cr70;
i &= INTERLACE_BIT;
j = i810_readb(CR_DATA_CGA, mmio);
i810_writeb(CR_INDEX_CGA, mmio, CR70);
i810_writeb(CR_DATA_CGA, mmio, j | i);
i810_writeb(CR_INDEX_CGA, mmio, CR80);
i810_writeb(CR_DATA_CGA, mmio, par->hw_state.cr80);
i810_writeb(MSR_WRITE, mmio, par->hw_state.msr);
i810_writeb(SR_INDEX, mmio, SR01);
i = (par->hw_state.sr01) & ~0xE0 ;
j = i810_readb(SR_DATA, mmio) & 0xE0;
i810_writeb(SR_INDEX, mmio, SR01);
i810_writeb(SR_DATA, mmio, i | j);
}
static void i810_restore_vga(struct i810fb_par *par)
{
u8 i;
u8 __iomem *mmio = par->mmio_start_virtual;
for (i = 0; i < 10; i++) {
i810_writeb(CR_INDEX_CGA, mmio, CR00 + i);
i810_writeb(CR_DATA_CGA, mmio, *((&par->hw_state.cr00) + i));
}
for (i = 0; i < 8; i++) {
i810_writeb(CR_INDEX_CGA, mmio, CR10 + i);
i810_writeb(CR_DATA_CGA, mmio, *((&par->hw_state.cr10) + i));
}
}
static void i810_restore_addr_map(struct i810fb_par *par)
{
u8 tmp;
u8 __iomem *mmio = par->mmio_start_virtual;
i810_writeb(GR_INDEX, mmio, GR10);
tmp = i810_readb(GR_DATA, mmio);
tmp &= ADDR_MAP_MASK;
tmp |= par->hw_state.gr10;
i810_writeb(GR_INDEX, mmio, GR10);
i810_writeb(GR_DATA, mmio, tmp);
}
static void i810_restore_2d(struct i810fb_par *par)
{
u32 tmp_long;
u16 tmp_word;
u8 __iomem *mmio = par->mmio_start_virtual;
tmp_word = i810_readw(BLTCNTL, mmio);
tmp_word &= ~(3 << 4);
tmp_word |= par->hw_state.bltcntl;
i810_writew(BLTCNTL, mmio, tmp_word);
i810_dram_off(mmio, OFF);
i810_writel(PIXCONF, mmio, par->hw_state.pixconf);
i810_dram_off(mmio, ON);
tmp_word = i810_readw(HWSTAM, mmio);
tmp_word &= 3 << 13;
tmp_word |= par->hw_state.hwstam;
i810_writew(HWSTAM, mmio, tmp_word);
tmp_long = i810_readl(FW_BLC, mmio);
tmp_long &= FW_BLC_MASK;
tmp_long |= par->hw_state.fw_blc;
i810_writel(FW_BLC, mmio, tmp_long);
i810_writel(HWS_PGA, mmio, par->hw_state.hws_pga);
i810_writew(IER, mmio, par->hw_state.ier);
i810_writew(IMR, mmio, par->hw_state.imr);
i810_writel(DPLYSTAS, mmio, par->hw_state.dplystas);
}
static void i810_restore_vga_state(struct i810fb_par *par)
{
u8 __iomem *mmio = par->mmio_start_virtual;
i810_screen_off(mmio, OFF);
i810_protect_regs(mmio, OFF);
i810_dram_off(mmio, OFF);
i810_restore_pll(par);
i810_restore_dac(par);
i810_restore_vga(par);
i810_restore_vgax(par);
i810_restore_addr_map(par);
i810_dram_off(mmio, ON);
i810_restore_2d(par);
i810_screen_off(mmio, ON);
i810_protect_regs(mmio, ON);
}
/***********************************************************************
* VGA State Save *
***********************************************************************/
static void i810_save_vgax(struct i810fb_par *par)
{
u8 i;
u8 __iomem *mmio = par->mmio_start_virtual;
for (i = 0; i < 4; i++) {
i810_writeb(CR_INDEX_CGA, mmio, CR30 + i);
*(&(par->hw_state.cr30) + i) = i810_readb(CR_DATA_CGA, mmio);
}
i810_writeb(CR_INDEX_CGA, mmio, CR35);
par->hw_state.cr35 = i810_readb(CR_DATA_CGA, mmio);
i810_writeb(CR_INDEX_CGA, mmio, CR39);
par->hw_state.cr39 = i810_readb(CR_DATA_CGA, mmio);
i810_writeb(CR_INDEX_CGA, mmio, CR41);
par->hw_state.cr41 = i810_readb(CR_DATA_CGA, mmio);
i810_writeb(CR_INDEX_CGA, mmio, CR70);
par->hw_state.cr70 = i810_readb(CR_DATA_CGA, mmio);
par->hw_state.msr = i810_readb(MSR_READ, mmio);
i810_writeb(CR_INDEX_CGA, mmio, CR80);
par->hw_state.cr80 = i810_readb(CR_DATA_CGA, mmio);
i810_writeb(SR_INDEX, mmio, SR01);
par->hw_state.sr01 = i810_readb(SR_DATA, mmio);
}
static void i810_save_vga(struct i810fb_par *par)
{
u8 i;
u8 __iomem *mmio = par->mmio_start_virtual;
for (i = 0; i < 10; i++) {
i810_writeb(CR_INDEX_CGA, mmio, CR00 + i);
*((&par->hw_state.cr00) + i) = i810_readb(CR_DATA_CGA, mmio);
}
for (i = 0; i < 8; i++) {
i810_writeb(CR_INDEX_CGA, mmio, CR10 + i);
*((&par->hw_state.cr10) + i) = i810_readb(CR_DATA_CGA, mmio);
}
}
static void i810_save_2d(struct i810fb_par *par)
{
u8 __iomem *mmio = par->mmio_start_virtual;
par->hw_state.dclk_2d = i810_readl(DCLK_2D, mmio);
par->hw_state.dclk_1d = i810_readl(DCLK_1D, mmio);
par->hw_state.dclk_0ds = i810_readl(DCLK_0DS, mmio);
par->hw_state.pixconf = i810_readl(PIXCONF, mmio);
par->hw_state.fw_blc = i810_readl(FW_BLC, mmio);
par->hw_state.bltcntl = i810_readw(BLTCNTL, mmio);
par->hw_state.hwstam = i810_readw(HWSTAM, mmio);
par->hw_state.hws_pga = i810_readl(HWS_PGA, mmio);
par->hw_state.ier = i810_readw(IER, mmio);
par->hw_state.imr = i810_readw(IMR, mmio);
par->hw_state.dplystas = i810_readl(DPLYSTAS, mmio);
}
static void i810_save_vga_state(struct i810fb_par *par)
{
i810_save_vga(par);
i810_save_vgax(par);
i810_save_2d(par);
}
/************************************************************
* Helpers *
************************************************************/
/**
* get_line_length - calculates buffer pitch in bytes
* @par: pointer to i810fb_par structure
* @xres_virtual: virtual resolution of the frame
* @bpp: bits per pixel
*
* DESCRIPTION:
* Calculates buffer pitch in bytes.
*/
static u32 get_line_length(struct i810fb_par *par, int xres_virtual, int bpp)
{
u32 length;
length = xres_virtual*bpp;
length = (length+31)&-32;
length >>= 3;
return length;
}
/**
* i810_calc_dclk - calculates the P, M, and N values of a pixelclock value
* @freq: target pixelclock in picoseconds
* @m: where to write M register
* @n: where to write N register
* @p: where to write P register
*
* DESCRIPTION:
* Based on the formula Freq_actual = (4*M*Freq_ref)/(N^P)
* Repeatedly computes the Freq until the actual Freq is equal to
* the target Freq or until the loop count is zero. In the latter
* case, the actual frequency nearest the target will be used.
*/
static void i810_calc_dclk(u32 freq, u32 *m, u32 *n, u32 *p)
{
u32 m_reg, n_reg, p_divisor, n_target_max;
u32 m_target, n_target, p_target, n_best, m_best, mod;
u32 f_out, target_freq, diff = 0, mod_min, diff_min;
diff_min = mod_min = 0xFFFFFFFF;
n_best = m_best = m_target = f_out = 0;
target_freq = freq;
n_target_max = 30;
/*
* find P such that target freq is 16x reference freq (Hz).
*/
p_divisor = 1;
p_target = 0;
while(!((1000000 * p_divisor)/(16 * 24 * target_freq)) &&
p_divisor <= 32) {
p_divisor <<= 1;
p_target++;
}
n_reg = m_reg = n_target = 3;
while (diff_min && mod_min && (n_target < n_target_max)) {
f_out = (p_divisor * n_reg * 1000000)/(4 * 24 * m_reg);
mod = (p_divisor * n_reg * 1000000) % (4 * 24 * m_reg);
m_target = m_reg;
n_target = n_reg;
if (f_out <= target_freq) {
n_reg++;
diff = target_freq - f_out;
} else {
m_reg++;
diff = f_out - target_freq;
}
if (diff_min > diff) {
diff_min = diff;
n_best = n_target;
m_best = m_target;
}
if (!diff && mod_min > mod) {
mod_min = mod;
n_best = n_target;
m_best = m_target;
}
}
if (m) *m = (m_best - 2) & 0x3FF;
if (n) *n = (n_best - 2) & 0x3FF;
if (p) *p = (p_target << 4);
}
/*************************************************************
* Hardware Cursor Routines *
*************************************************************/
/**
* i810_enable_cursor - show or hide the hardware cursor
* @mmio: address of register space
* @mode: show (1) or hide (0)
*
* Description:
* Shows or hides the hardware cursor
*/
static void i810_enable_cursor(u8 __iomem *mmio, int mode)
{
u32 temp;
temp = i810_readl(PIXCONF, mmio);
temp = (mode == ON) ? temp | CURSOR_ENABLE_MASK :
temp & ~CURSOR_ENABLE_MASK;
i810_writel(PIXCONF, mmio, temp);
}
static void i810_reset_cursor_image(struct i810fb_par *par)
{
u8 __iomem *addr = par->cursor_heap.virtual;
int i, j;
for (i = 64; i--; ) {
for (j = 0; j < 8; j++) {
i810_writeb(j, addr, 0xff);
i810_writeb(j+8, addr, 0x00);
}
addr +=16;
}
}
static void i810_load_cursor_image(int width, int height, u8 *data,
struct i810fb_par *par)
{
u8 __iomem *addr = par->cursor_heap.virtual;
int i, j, w = width/8;
int mod = width % 8, t_mask, d_mask;
t_mask = 0xff >> mod;
d_mask = ~(0xff >> mod);
for (i = height; i--; ) {
for (j = 0; j < w; j++) {
i810_writeb(j+0, addr, 0x00);
i810_writeb(j+8, addr, *data++);
}
if (mod) {
i810_writeb(j+0, addr, t_mask);
i810_writeb(j+8, addr, *data++ & d_mask);
}
addr += 16;
}
}
static void i810_load_cursor_colors(int fg, int bg, struct fb_info *info)
{
struct i810fb_par *par = info->par;
u8 __iomem *mmio = par->mmio_start_virtual;
u8 red, green, blue, trans, temp;
i810fb_getcolreg(bg, &red, &green, &blue, &trans, info);
temp = i810_readb(PIXCONF1, mmio);
i810_writeb(PIXCONF1, mmio, temp | EXTENDED_PALETTE);
i810_write_dac(4, red, green, blue, mmio);
i810_writeb(PIXCONF1, mmio, temp);
i810fb_getcolreg(fg, &red, &green, &blue, &trans, info);
temp = i810_readb(PIXCONF1, mmio);
i810_writeb(PIXCONF1, mmio, temp | EXTENDED_PALETTE);
i810_write_dac(5, red, green, blue, mmio);
i810_writeb(PIXCONF1, mmio, temp);
}
/**
* i810_init_cursor - initializes the cursor
* @par: pointer to i810fb_par structure
*
* DESCRIPTION:
* Initializes the cursor registers
*/
static void i810_init_cursor(struct i810fb_par *par)
{
u8 __iomem *mmio = par->mmio_start_virtual;
i810_enable_cursor(mmio, OFF);
i810_writel(CURBASE, mmio, par->cursor_heap.physical);
i810_writew(CURCNTR, mmio, COORD_ACTIVE | CURSOR_MODE_64_XOR);
}
/*********************************************************************
* Framebuffer hook helpers *
*********************************************************************/
/**
* i810_round_off - Round off values to capability of hardware
* @var: pointer to fb_var_screeninfo structure
*
* DESCRIPTION:
* @var contains user-defined information for the mode to be set.
* This will try modify those values to ones nearest the
* capability of the hardware
*/
static void i810_round_off(struct fb_var_screeninfo *var)
{
u32 xres, yres, vxres, vyres;
/*
* Presently supports only these configurations
*/
xres = var->xres;
yres = var->yres;
vxres = var->xres_virtual;
vyres = var->yres_virtual;
var->bits_per_pixel += 7;
var->bits_per_pixel &= ~7;
if (var->bits_per_pixel < 8)
var->bits_per_pixel = 8;
if (var->bits_per_pixel > 32)
var->bits_per_pixel = 32;
round_off_xres(&xres);
if (xres < 40)
xres = 40;
if (xres > 2048)
xres = 2048;
xres = (xres + 7) & ~7;
if (vxres < xres)
vxres = xres;
round_off_yres(&xres, &yres);
if (yres < 1)
yres = 1;
if (yres >= 2048)
yres = 2048;
if (vyres < yres)
vyres = yres;
if (var->bits_per_pixel == 32)
var->accel_flags = 0;
/* round of horizontal timings to nearest 8 pixels */
var->left_margin = (var->left_margin + 4) & ~7;
var->right_margin = (var->right_margin + 4) & ~7;
var->hsync_len = (var->hsync_len + 4) & ~7;
if (var->vmode & FB_VMODE_INTERLACED) {
if (!((yres + var->upper_margin + var->vsync_len +
var->lower_margin) & 1))
var->upper_margin++;
}
var->xres = xres;
var->yres = yres;
var->xres_virtual = vxres;
var->yres_virtual = vyres;
}
/**
* set_color_bitfields - sets rgba fields
* @var: pointer to fb_var_screeninfo
*
* DESCRIPTION:
* The length, offset and ordering for each color field
* (red, green, blue) will be set as specified
* by the hardware
*/
static void set_color_bitfields(struct fb_var_screeninfo *var)
{
switch (var->bits_per_pixel) {
case 8:
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 0;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 16:
var->green.length = (var->green.length == 5) ? 5 : 6;
var->red.length = 5;
var->blue.length = 5;
var->transp.length = 6 - var->green.length;
var->blue.offset = 0;
var->green.offset = 5;
var->red.offset = 5 + var->green.length;
var->transp.offset = (5 + var->red.offset) & 15;
break;
case 24: /* RGB 888 */
case 32: /* RGBA 8888 */
var->red.offset = 16;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.length = var->bits_per_pixel - 24;
var->transp.offset = (var->transp.length) ? 24 : 0;
break;
}
var->red.msb_right = 0;
var->green.msb_right = 0;
var->blue.msb_right = 0;
var->transp.msb_right = 0;
}
/**
* i810_check_params - check if contents in var are valid
* @var: pointer to fb_var_screeninfo
* @info: pointer to fb_info
*
* DESCRIPTION:
* This will check if the framebuffer size is sufficient
* for the current mode and if the user's monitor has the
* required specifications to display the current mode.
*/
static int i810_check_params(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct i810fb_par *par = info->par;
int line_length, vidmem, mode_valid = 0, retval = 0;
u32 vyres = var->yres_virtual, vxres = var->xres_virtual;
/*
* Memory limit
*/
line_length = get_line_length(par, vxres, var->bits_per_pixel);
vidmem = line_length*vyres;
if (vidmem > par->fb.size) {
vyres = par->fb.size/line_length;
if (vyres < var->yres) {
vyres = info->var.yres;
vxres = par->fb.size/vyres;
vxres /= var->bits_per_pixel >> 3;
line_length = get_line_length(par, vxres,
var->bits_per_pixel);
vidmem = line_length * info->var.yres;
if (vxres < var->xres) {
printk("i810fb: required video memory, "
"%d bytes, for %dx%d-%d (virtual) "
"is out of range\n",
vidmem, vxres, vyres,
var->bits_per_pixel);
return -ENOMEM;
}
}
}
var->xres_virtual = vxres;
var->yres_virtual = vyres;
/*
* Monitor limit
*/
switch (var->bits_per_pixel) {
case 8:
info->monspecs.dclkmax = 234000000;
break;
case 16:
info->monspecs.dclkmax = 229000000;
break;
case 24:
case 32:
info->monspecs.dclkmax = 204000000;
break;
}
info->monspecs.dclkmin = 15000000;
if (!fb_validate_mode(var, info))
mode_valid = 1;
#ifdef CONFIG_FB_I810_I2C
if (!mode_valid && info->monspecs.gtf &&
!fb_get_mode(FB_MAXTIMINGS, 0, var, info))
mode_valid = 1;
if (!mode_valid && info->monspecs.modedb_len) {
const struct fb_videomode *mode;
mode = fb_find_best_mode(var, &info->modelist);
if (mode) {
fb_videomode_to_var(var, mode);
mode_valid = 1;
}
}
#endif
if (!mode_valid && info->monspecs.modedb_len == 0) {
if (fb_get_mode(FB_MAXTIMINGS, 0, var, info)) {
int default_sync = (info->monspecs.hfmin-HFMIN)
|(info->monspecs.hfmax-HFMAX)
|(info->monspecs.vfmin-VFMIN)
|(info->monspecs.vfmax-VFMAX);
printk("i810fb: invalid video mode%s\n",
default_sync ? "" : ". Specifying "
"vsyncN/hsyncN parameters may help");
retval = -EINVAL;
}
}
return retval;
}
/**
* encode_fix - fill up fb_fix_screeninfo structure
* @fix: pointer to fb_fix_screeninfo
* @info: pointer to fb_info
*
* DESCRIPTION:
* This will set up parameters that are unmodifiable by the user.
*/
static int encode_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
{
struct i810fb_par *par = info->par;
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
strcpy(fix->id, "I810");
mutex_lock(&info->mm_lock);
fix->smem_start = par->fb.physical;
fix->smem_len = par->fb.size;
mutex_unlock(&info->mm_lock);
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
fix->xpanstep = 8;
fix->ypanstep = 1;
switch (info->var.bits_per_pixel) {
case 8:
fix->visual = FB_VISUAL_PSEUDOCOLOR;
break;
case 16:
case 24:
case 32:
if (info->var.nonstd)
fix->visual = FB_VISUAL_DIRECTCOLOR;
else
fix->visual = FB_VISUAL_TRUECOLOR;
break;
default:
return -EINVAL;
}
fix->ywrapstep = 0;
fix->line_length = par->pitch;
fix->mmio_start = par->mmio_start_phys;
fix->mmio_len = MMIO_SIZE;
fix->accel = FB_ACCEL_I810;
return 0;
}
/**
* decode_var - modify par according to contents of var
* @var: pointer to fb_var_screeninfo
* @par: pointer to i810fb_par
*
* DESCRIPTION:
* Based on the contents of @var, @par will be dynamically filled up.
* @par contains all information necessary to modify the hardware.
*/
static void decode_var(const struct fb_var_screeninfo *var,
struct i810fb_par *par)
{
u32 xres, yres, vxres, vyres;
xres = var->xres;
yres = var->yres;
vxres = var->xres_virtual;
vyres = var->yres_virtual;
switch (var->bits_per_pixel) {
case 8:
par->pixconf = PIXCONF8;
par->bltcntl = 0;
par->depth = 1;
par->blit_bpp = BPP8;
break;
case 16:
if (var->green.length == 5)
par->pixconf = PIXCONF15;
else
par->pixconf = PIXCONF16;
par->bltcntl = 16;
par->depth = 2;
par->blit_bpp = BPP16;
break;
case 24:
par->pixconf = PIXCONF24;
par->bltcntl = 32;
par->depth = 3;
par->blit_bpp = BPP24;
break;
case 32:
par->pixconf = PIXCONF32;
par->bltcntl = 0;
par->depth = 4;
par->blit_bpp = 3 << 24;
break;
}
if (var->nonstd && var->bits_per_pixel != 8)
par->pixconf |= 1 << 27;
i810_calc_dclk(var->pixclock, &par->regs.M,
&par->regs.N, &par->regs.P);
i810fb_encode_registers(var, par, xres, yres);
par->watermark = i810_get_watermark(var, par);
par->pitch = get_line_length(par, vxres, var->bits_per_pixel);
}
/**
* i810fb_getcolreg - gets red, green and blue values of the hardware DAC
* @regno: DAC index
* @red: red
* @green: green
* @blue: blue
* @transp: transparency (alpha)
* @info: pointer to fb_info
*
* DESCRIPTION:
* Gets the red, green and blue values of the hardware DAC as pointed by @regno
* and writes them to @red, @green and @blue respectively
*/
static int i810fb_getcolreg(u8 regno, u8 *red, u8 *green, u8 *blue,
u8 *transp, struct fb_info *info)
{
struct i810fb_par *par = info->par;
u8 __iomem *mmio = par->mmio_start_virtual;
u8 temp;
if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
if ((info->var.green.length == 5 && regno > 31) ||
(info->var.green.length == 6 && regno > 63))
return 1;
}
temp = i810_readb(PIXCONF1, mmio);
i810_writeb(PIXCONF1, mmio, temp & ~EXTENDED_PALETTE);
if (info->fix.visual == FB_VISUAL_DIRECTCOLOR &&
info->var.green.length == 5)
i810_read_dac(regno * 8, red, green, blue, mmio);
else if (info->fix.visual == FB_VISUAL_DIRECTCOLOR &&
info->var.green.length == 6) {
u8 tmp;
i810_read_dac(regno * 8, red, &tmp, blue, mmio);
i810_read_dac(regno * 4, &tmp, green, &tmp, mmio);
}
else
i810_read_dac(regno, red, green, blue, mmio);
*transp = 0;
i810_writeb(PIXCONF1, mmio, temp);
return 0;
}
/******************************************************************
* Framebuffer device-specific hooks *
******************************************************************/
static int i810fb_open(struct fb_info *info, int user)
{
struct i810fb_par *par = info->par;
mutex_lock(&par->open_lock);
if (par->use_count == 0) {
memset(&par->state, 0, sizeof(struct vgastate));
par->state.flags = VGA_SAVE_CMAP;
par->state.vgabase = par->mmio_start_virtual;
save_vga(&par->state);
i810_save_vga_state(par);
}
par->use_count++;
mutex_unlock(&par->open_lock);
return 0;
}
static int i810fb_release(struct fb_info *info, int user)
{
struct i810fb_par *par = info->par;
mutex_lock(&par->open_lock);
if (par->use_count == 0) {
mutex_unlock(&par->open_lock);
return -EINVAL;
}
if (par->use_count == 1) {
i810_restore_vga_state(par);
restore_vga(&par->state);
}
par->use_count--;
mutex_unlock(&par->open_lock);
return 0;
}
static int i810fb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
struct i810fb_par *par = info->par;
u8 __iomem *mmio = par->mmio_start_virtual;
u8 temp;
int i;
if (regno > 255) return 1;
if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
if ((info->var.green.length == 5 && regno > 31) ||
(info->var.green.length == 6 && regno > 63))
return 1;
}
if (info->var.grayscale)
red = green = blue = (19595 * red + 38470 * green +
7471 * blue) >> 16;
temp = i810_readb(PIXCONF1, mmio);
i810_writeb(PIXCONF1, mmio, temp & ~EXTENDED_PALETTE);
if (info->fix.visual == FB_VISUAL_DIRECTCOLOR &&
info->var.green.length == 5) {
for (i = 0; i < 8; i++)
i810_write_dac((u8) (regno * 8) + i, (u8) red,
(u8) green, (u8) blue, mmio);
} else if (info->fix.visual == FB_VISUAL_DIRECTCOLOR &&
info->var.green.length == 6) {
u8 r, g, b;
if (regno < 32) {
for (i = 0; i < 8; i++)
i810_write_dac((u8) (regno * 8) + i,
(u8) red, (u8) green,
(u8) blue, mmio);
}
i810_read_dac((u8) (regno*4), &r, &g, &b, mmio);
for (i = 0; i < 4; i++)
i810_write_dac((u8) (regno*4) + i, r, (u8) green,
b, mmio);
} else if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR) {
i810_write_dac((u8) regno, (u8) red, (u8) green,
(u8) blue, mmio);
}
i810_writeb(PIXCONF1, mmio, temp);
if (regno < 16) {
switch (info->var.bits_per_pixel) {
case 16:
if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
if (info->var.green.length == 5)
((u32 *)info->pseudo_palette)[regno] =
(regno << 10) | (regno << 5) |
regno;
else
((u32 *)info->pseudo_palette)[regno] =
(regno << 11) | (regno << 5) |
regno;
} else {
if (info->var.green.length == 5) {
/* RGB 555 */
((u32 *)info->pseudo_palette)[regno] =
((red & 0xf800) >> 1) |
((green & 0xf800) >> 6) |
((blue & 0xf800) >> 11);
} else {
/* RGB 565 */
((u32 *)info->pseudo_palette)[regno] =
(red & 0xf800) |
((green & 0xf800) >> 5) |
((blue & 0xf800) >> 11);
}
}
break;
case 24: /* RGB 888 */
case 32: /* RGBA 8888 */
if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
((u32 *)info->pseudo_palette)[regno] =
(regno << 16) | (regno << 8) |
regno;
else
((u32 *)info->pseudo_palette)[regno] =
((red & 0xff00) << 8) |
(green & 0xff00) |
((blue & 0xff00) >> 8);
break;
}
}
return 0;
}
static int i810fb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct i810fb_par *par = info->par;
u32 total;
total = var->xoffset * par->depth +
var->yoffset * info->fix.line_length;
i810fb_load_front(total, info);
return 0;
}
static int i810fb_blank (int blank_mode, struct fb_info *info)
{
struct i810fb_par *par = info->par;
u8 __iomem *mmio = par->mmio_start_virtual;
int mode = 0, pwr, scr_off = 0;
pwr = i810_readl(PWR_CLKC, mmio);
switch (blank_mode) {
case FB_BLANK_UNBLANK:
mode = POWERON;
pwr |= 1;
scr_off = ON;
break;
case FB_BLANK_NORMAL:
mode = POWERON;
pwr |= 1;
scr_off = OFF;
break;
case FB_BLANK_VSYNC_SUSPEND:
mode = STANDBY;
pwr |= 1;
scr_off = OFF;
break;
case FB_BLANK_HSYNC_SUSPEND:
mode = SUSPEND;
pwr |= 1;
scr_off = OFF;
break;
case FB_BLANK_POWERDOWN:
mode = POWERDOWN;
pwr &= ~1;
scr_off = OFF;
break;
default:
return -EINVAL;
}
i810_screen_off(mmio, scr_off);
i810_writel(HVSYNC, mmio, mode);
i810_writel(PWR_CLKC, mmio, pwr);
return 0;
}
static int i810fb_set_par(struct fb_info *info)
{
struct i810fb_par *par = info->par;
decode_var(&info->var, par);
i810_load_regs(par);
i810_init_cursor(par);
encode_fix(&info->fix, info);
if (info->var.accel_flags && !(par->dev_flags & LOCKUP)) {
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
FBINFO_HWACCEL_IMAGEBLIT;
info->pixmap.scan_align = 2;
} else {
info->pixmap.scan_align = 1;
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
}
return 0;
}
static int i810fb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
int err;
if (IS_DVT) {
var->vmode &= ~FB_VMODE_MASK;
var->vmode |= FB_VMODE_NONINTERLACED;
}
if (var->vmode & FB_VMODE_DOUBLE) {
var->vmode &= ~FB_VMODE_MASK;
var->vmode |= FB_VMODE_NONINTERLACED;
}
i810_round_off(var);
if ((err = i810_check_params(var, info)))
return err;
i810fb_fill_var_timings(var);
set_color_bitfields(var);
return 0;
}
static int i810fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
struct i810fb_par *par = info->par;
u8 __iomem *mmio = par->mmio_start_virtual;
if (par->dev_flags & LOCKUP)
return -ENXIO;
if (cursor->image.width > 64 || cursor->image.height > 64)
return -ENXIO;
if ((i810_readl(CURBASE, mmio) & 0xf) != par->cursor_heap.physical) {
i810_init_cursor(par);
cursor->set |= FB_CUR_SETALL;
}
i810_enable_cursor(mmio, OFF);
if (cursor->set & FB_CUR_SETPOS) {
u32 tmp;
tmp = (cursor->image.dx - info->var.xoffset) & 0xffff;
tmp |= (cursor->image.dy - info->var.yoffset) << 16;
i810_writel(CURPOS, mmio, tmp);
}
if (cursor->set & FB_CUR_SETSIZE)
i810_reset_cursor_image(par);
if (cursor->set & FB_CUR_SETCMAP)
i810_load_cursor_colors(cursor->image.fg_color,
cursor->image.bg_color,
info);
if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
int size = ((cursor->image.width + 7) >> 3) *
cursor->image.height;
int i;
u8 *data = kmalloc(64 * 8, GFP_ATOMIC);
if (data == NULL)
return -ENOMEM;
switch (cursor->rop) {
case ROP_XOR:
for (i = 0; i < size; i++)
data[i] = cursor->image.data[i] ^ cursor->mask[i];
break;
case ROP_COPY:
default:
for (i = 0; i < size; i++)
data[i] = cursor->image.data[i] & cursor->mask[i];
break;
}
i810_load_cursor_image(cursor->image.width,
cursor->image.height, data,
par);
kfree(data);
}
if (cursor->enable)
i810_enable_cursor(mmio, ON);
return 0;
}
static struct fb_ops i810fb_ops __devinitdata = {
.owner = THIS_MODULE,
.fb_open = i810fb_open,
.fb_release = i810fb_release,
.fb_check_var = i810fb_check_var,
.fb_set_par = i810fb_set_par,
.fb_setcolreg = i810fb_setcolreg,
.fb_blank = i810fb_blank,
.fb_pan_display = i810fb_pan_display,
.fb_fillrect = i810fb_fillrect,
.fb_copyarea = i810fb_copyarea,
.fb_imageblit = i810fb_imageblit,
.fb_cursor = i810fb_cursor,
.fb_sync = i810fb_sync,
};
/***********************************************************************
* Power Management *
***********************************************************************/
static int i810fb_suspend(struct pci_dev *dev, pm_message_t mesg)
{
struct fb_info *info = pci_get_drvdata(dev);
struct i810fb_par *par = info->par;
par->cur_state = mesg.event;
switch (mesg.event) {
case PM_EVENT_FREEZE:
case PM_EVENT_PRETHAW:
dev->dev.power.power_state = mesg;
return 0;
}
acquire_console_sem();
fb_set_suspend(info, 1);
if (info->fbops->fb_sync)
info->fbops->fb_sync(info);
i810fb_blank(FB_BLANK_POWERDOWN, info);
agp_unbind_memory(par->i810_gtt.i810_fb_memory);
agp_unbind_memory(par->i810_gtt.i810_cursor_memory);
pci_save_state(dev);
pci_disable_device(dev);
pci_set_power_state(dev, pci_choose_state(dev, mesg));
release_console_sem();
return 0;
}
static int i810fb_resume(struct pci_dev *dev)
{
struct fb_info *info = pci_get_drvdata(dev);
struct i810fb_par *par = info->par;
int cur_state = par->cur_state;
par->cur_state = PM_EVENT_ON;
if (cur_state == PM_EVENT_FREEZE) {
pci_set_power_state(dev, PCI_D0);
return 0;
}
acquire_console_sem();
pci_set_power_state(dev, PCI_D0);
pci_restore_state(dev);
if (pci_enable_device(dev))
goto fail;
pci_set_master(dev);
agp_bind_memory(par->i810_gtt.i810_fb_memory,
par->fb.offset);
agp_bind_memory(par->i810_gtt.i810_cursor_memory,
par->cursor_heap.offset);
i810fb_set_par(info);
fb_set_suspend (info, 0);
info->fbops->fb_blank(VESA_NO_BLANKING, info);
fail:
release_console_sem();
return 0;
}
/***********************************************************************
* AGP resource allocation *
***********************************************************************/
static void __devinit i810_fix_pointers(struct i810fb_par *par)
{
par->fb.physical = par->aperture.physical+(par->fb.offset << 12);
par->fb.virtual = par->aperture.virtual+(par->fb.offset << 12);
par->iring.physical = par->aperture.physical +
(par->iring.offset << 12);
par->iring.virtual = par->aperture.virtual +
(par->iring.offset << 12);
par->cursor_heap.virtual = par->aperture.virtual+
(par->cursor_heap.offset << 12);
}
static void __devinit i810_fix_offsets(struct i810fb_par *par)
{
if (vram + 1 > par->aperture.size >> 20)
vram = (par->aperture.size >> 20) - 1;
if (v_offset_default > (par->aperture.size >> 20))
v_offset_default = (par->aperture.size >> 20);
if (vram + v_offset_default + 1 > par->aperture.size >> 20)
v_offset_default = (par->aperture.size >> 20) - (vram + 1);
par->fb.size = vram << 20;
par->fb.offset = v_offset_default << 20;
par->fb.offset >>= 12;
par->iring.offset = par->fb.offset + (par->fb.size >> 12);
par->iring.size = RINGBUFFER_SIZE;
par->cursor_heap.offset = par->iring.offset + (RINGBUFFER_SIZE >> 12);
par->cursor_heap.size = 4096;
}
static int __devinit i810_alloc_agp_mem(struct fb_info *info)
{
struct i810fb_par *par = info->par;
int size;
struct agp_bridge_data *bridge;
i810_fix_offsets(par);
size = par->fb.size + par->iring.size;
if (!(bridge = agp_backend_acquire(par->dev))) {
printk("i810fb_alloc_fbmem: cannot acquire agpgart\n");
return -ENODEV;
}
if (!(par->i810_gtt.i810_fb_memory =
agp_allocate_memory(bridge, size >> 12, AGP_NORMAL_MEMORY))) {
printk("i810fb_alloc_fbmem: can't allocate framebuffer "
"memory\n");
agp_backend_release(bridge);
return -ENOMEM;
}
if (agp_bind_memory(par->i810_gtt.i810_fb_memory,
par->fb.offset)) {
printk("i810fb_alloc_fbmem: can't bind framebuffer memory\n");
agp_backend_release(bridge);
return -EBUSY;
}
if (!(par->i810_gtt.i810_cursor_memory =
agp_allocate_memory(bridge, par->cursor_heap.size >> 12,
AGP_PHYSICAL_MEMORY))) {
printk("i810fb_alloc_cursormem: can't allocate"
"cursor memory\n");
agp_backend_release(bridge);
return -ENOMEM;
}
if (agp_bind_memory(par->i810_gtt.i810_cursor_memory,
par->cursor_heap.offset)) {
printk("i810fb_alloc_cursormem: cannot bind cursor memory\n");
agp_backend_release(bridge);
return -EBUSY;
}
par->cursor_heap.physical = par->i810_gtt.i810_cursor_memory->physical;
i810_fix_pointers(par);
agp_backend_release(bridge);
return 0;
}
/***************************************************************
* Initialization *
***************************************************************/
/**
* i810_init_monspecs
* @info: pointer to device specific info structure
*
* DESCRIPTION:
* Sets the user monitor's horizontal and vertical
* frequency limits
*/
static void __devinit i810_init_monspecs(struct fb_info *info)
{
if (!hsync1)
hsync1 = HFMIN;
if (!hsync2)
hsync2 = HFMAX;
if (!info->monspecs.hfmax)
info->monspecs.hfmax = hsync2;
if (!info->monspecs.hfmin)
info->monspecs.hfmin = hsync1;
if (hsync2 < hsync1)
info->monspecs.hfmin = hsync2;
if (!vsync1)
vsync1 = VFMIN;
if (!vsync2)
vsync2 = VFMAX;
if (IS_DVT && vsync1 < 60)
vsync1 = 60;
if (!info->monspecs.vfmax)
info->monspecs.vfmax = vsync2;
if (!info->monspecs.vfmin)
info->monspecs.vfmin = vsync1;
if (vsync2 < vsync1)
info->monspecs.vfmin = vsync2;
}
/**
* i810_init_defaults - initializes default values to use
* @par: pointer to i810fb_par structure
* @info: pointer to current fb_info structure
*/
static void __devinit i810_init_defaults(struct i810fb_par *par,
struct fb_info *info)
{
mutex_init(&par->open_lock);
if (voffset)
v_offset_default = voffset;
else if (par->aperture.size > 32 * 1024 * 1024)
v_offset_default = 16;
else
v_offset_default = 8;
if (!vram)
vram = 1;
if (accel)
par->dev_flags |= HAS_ACCELERATION;
if (sync)
par->dev_flags |= ALWAYS_SYNC;
par->ddc_num = ddc3;
if (bpp < 8)
bpp = 8;
par->i810fb_ops = i810fb_ops;
if (xres)
info->var.xres = xres;
else
info->var.xres = 640;
if (yres)
info->var.yres = yres;
else
info->var.yres = 480;
if (!vyres)
vyres = (vram << 20)/(info->var.xres*bpp >> 3);
info->var.yres_virtual = vyres;
info->var.bits_per_pixel = bpp;
if (dcolor)
info->var.nonstd = 1;
if (par->dev_flags & HAS_ACCELERATION)
info->var.accel_flags = 1;
i810_init_monspecs(info);
}
/**
* i810_init_device - initialize device
* @par: pointer to i810fb_par structure
*/
static void __devinit i810_init_device(struct i810fb_par *par)
{
u8 reg;
u8 __iomem *mmio = par->mmio_start_virtual;
if (mtrr) set_mtrr(par);
i810_init_cursor(par);
/* mvo: enable external vga-connector (for laptops) */
if (extvga) {
i810_writel(HVSYNC, mmio, 0);
i810_writel(PWR_CLKC, mmio, 3);
}
pci_read_config_byte(par->dev, 0x50, &reg);
reg &= FREQ_MASK;
par->mem_freq = (reg) ? 133 : 100;
}
static int __devinit
i810_allocate_pci_resource(struct i810fb_par *par,
const struct pci_device_id *entry)
{
int err;
if ((err = pci_enable_device(par->dev))) {
printk("i810fb_init: cannot enable device\n");
return err;
}
par->res_flags |= PCI_DEVICE_ENABLED;
if (pci_resource_len(par->dev, 0) > 512 * 1024) {
par->aperture.physical = pci_resource_start(par->dev, 0);
par->aperture.size = pci_resource_len(par->dev, 0);
par->mmio_start_phys = pci_resource_start(par->dev, 1);
} else {
par->aperture.physical = pci_resource_start(par->dev, 1);
par->aperture.size = pci_resource_len(par->dev, 1);
par->mmio_start_phys = pci_resource_start(par->dev, 0);
}
if (!par->aperture.size) {
printk("i810fb_init: device is disabled\n");
return -ENOMEM;
}
if (!request_mem_region(par->aperture.physical,
par->aperture.size,
i810_pci_list[entry->driver_data])) {
printk("i810fb_init: cannot request framebuffer region\n");
return -ENODEV;
}
par->res_flags |= FRAMEBUFFER_REQ;
par->aperture.virtual = ioremap_nocache(par->aperture.physical,
par->aperture.size);
if (!par->aperture.virtual) {
printk("i810fb_init: cannot remap framebuffer region\n");
return -ENODEV;
}
if (!request_mem_region(par->mmio_start_phys,
MMIO_SIZE,
i810_pci_list[entry->driver_data])) {
printk("i810fb_init: cannot request mmio region\n");
return -ENODEV;
}
par->res_flags |= MMIO_REQ;
par->mmio_start_virtual = ioremap_nocache(par->mmio_start_phys,
MMIO_SIZE);
if (!par->mmio_start_virtual) {
printk("i810fb_init: cannot remap mmio region\n");
return -ENODEV;
}
return 0;
}
static void __devinit i810fb_find_init_mode(struct fb_info *info)
{
struct fb_videomode mode;
struct fb_var_screeninfo var;
struct fb_monspecs *specs = &info->monspecs;
int found = 0;
#ifdef CONFIG_FB_I810_I2C
int i;
int err = 1;
struct i810fb_par *par = info->par;
#endif
INIT_LIST_HEAD(&info->modelist);
memset(&mode, 0, sizeof(struct fb_videomode));
var = info->var;
#ifdef CONFIG_FB_I810_I2C
i810_create_i2c_busses(par);
for (i = 0; i < par->ddc_num + 1; i++) {
err = i810_probe_i2c_connector(info, &par->edid, i);
if (!err)
break;
}
if (!err)
printk("i810fb_init_pci: DDC probe successful\n");
fb_edid_to_monspecs(par->edid, specs);
if (specs->modedb == NULL)
printk("i810fb_init_pci: Unable to get Mode Database\n");
fb_videomode_to_modelist(specs->modedb, specs->modedb_len,
&info->modelist);
if (specs->modedb != NULL) {
const struct fb_videomode *m;
if (xres && yres) {
if ((m = fb_find_best_mode(&var, &info->modelist))) {
mode = *m;
found = 1;
}
}
if (!found) {
m = fb_find_best_display(&info->monspecs, &info->modelist);
mode = *m;
found = 1;
}
fb_videomode_to_var(&var, &mode);
}
#endif
if (mode_option)
fb_find_mode(&var, info, mode_option, specs->modedb,
specs->modedb_len, (found) ? &mode : NULL,
info->var.bits_per_pixel);
info->var = var;
fb_destroy_modedb(specs->modedb);
specs->modedb = NULL;
}
#ifndef MODULE
static int __devinit i810fb_setup(char *options)
{
char *this_opt, *suffix = NULL;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!strncmp(this_opt, "mtrr", 4))
mtrr = 1;
else if (!strncmp(this_opt, "accel", 5))
accel = 1;
else if (!strncmp(this_opt, "extvga", 6))
extvga = 1;
else if (!strncmp(this_opt, "sync", 4))
sync = 1;
else if (!strncmp(this_opt, "vram:", 5))
vram = (simple_strtoul(this_opt+5, NULL, 0));
else if (!strncmp(this_opt, "voffset:", 8))
voffset = (simple_strtoul(this_opt+8, NULL, 0));
else if (!strncmp(this_opt, "xres:", 5))
xres = simple_strtoul(this_opt+5, NULL, 0);
else if (!strncmp(this_opt, "yres:", 5))
yres = simple_strtoul(this_opt+5, NULL, 0);
else if (!strncmp(this_opt, "vyres:", 6))
vyres = simple_strtoul(this_opt+6, NULL, 0);
else if (!strncmp(this_opt, "bpp:", 4))
bpp = simple_strtoul(this_opt+4, NULL, 0);
else if (!strncmp(this_opt, "hsync1:", 7)) {
hsync1 = simple_strtoul(this_opt+7, &suffix, 0);
if (strncmp(suffix, "H", 1))
hsync1 *= 1000;
} else if (!strncmp(this_opt, "hsync2:", 7)) {
hsync2 = simple_strtoul(this_opt+7, &suffix, 0);
if (strncmp(suffix, "H", 1))
hsync2 *= 1000;
} else if (!strncmp(this_opt, "vsync1:", 7))
vsync1 = simple_strtoul(this_opt+7, NULL, 0);
else if (!strncmp(this_opt, "vsync2:", 7))
vsync2 = simple_strtoul(this_opt+7, NULL, 0);
else if (!strncmp(this_opt, "dcolor", 6))
dcolor = 1;
else if (!strncmp(this_opt, "ddc3", 4))
ddc3 = 3;
else
mode_option = this_opt;
}
return 0;
}
#endif
static int __devinit i810fb_init_pci (struct pci_dev *dev,
const struct pci_device_id *entry)
{
struct fb_info *info;
struct i810fb_par *par = NULL;
struct fb_videomode mode;
int i, err = -1, vfreq, hfreq, pixclock;
i = 0;
info = framebuffer_alloc(sizeof(struct i810fb_par), &dev->dev);
if (!info)
return -ENOMEM;
par = info->par;
par->dev = dev;
if (!(info->pixmap.addr = kzalloc(8*1024, GFP_KERNEL))) {
i810fb_release_resource(info, par);
return -ENOMEM;
}
info->pixmap.size = 8*1024;
info->pixmap.buf_align = 8;
info->pixmap.access_align = 32;
info->pixmap.flags = FB_PIXMAP_SYSTEM;
if ((err = i810_allocate_pci_resource(par, entry))) {
i810fb_release_resource(info, par);
return err;
}
i810_init_defaults(par, info);
if ((err = i810_alloc_agp_mem(info))) {
i810fb_release_resource(info, par);
return err;
}
i810_init_device(par);
info->screen_base = par->fb.virtual;
info->fbops = &par->i810fb_ops;
info->pseudo_palette = par->pseudo_palette;
fb_alloc_cmap(&info->cmap, 256, 0);
i810fb_find_init_mode(info);
if ((err = info->fbops->fb_check_var(&info->var, info))) {
i810fb_release_resource(info, par);
return err;
}
fb_var_to_videomode(&mode, &info->var);
fb_add_videomode(&mode, &info->modelist);
i810fb_init_ringbuffer(info);
err = register_framebuffer(info);
if (err < 0) {
i810fb_release_resource(info, par);
printk("i810fb_init: cannot register framebuffer device\n");
return err;
}
pci_set_drvdata(dev, info);
pixclock = 1000000000/(info->var.pixclock);
pixclock *= 1000;
hfreq = pixclock/(info->var.xres + info->var.left_margin +
info->var.hsync_len + info->var.right_margin);
vfreq = hfreq/(info->var.yres + info->var.upper_margin +
info->var.vsync_len + info->var.lower_margin);
printk("I810FB: fb%d : %s v%d.%d.%d%s\n"
"I810FB: Video RAM : %dK\n"
"I810FB: Monitor : H: %d-%d KHz V: %d-%d Hz\n"
"I810FB: Mode : %dx%d-%dbpp@%dHz\n",
info->node,
i810_pci_list[entry->driver_data],
VERSION_MAJOR, VERSION_MINOR, VERSION_TEENIE, BRANCH_VERSION,
(int) par->fb.size>>10, info->monspecs.hfmin/1000,
info->monspecs.hfmax/1000, info->monspecs.vfmin,
info->monspecs.vfmax, info->var.xres,
info->var.yres, info->var.bits_per_pixel, vfreq);
return 0;
}
/***************************************************************
* De-initialization *
***************************************************************/
static void i810fb_release_resource(struct fb_info *info,
struct i810fb_par *par)
{
struct gtt_data *gtt = &par->i810_gtt;
unset_mtrr(par);
i810_delete_i2c_busses(par);
if (par->i810_gtt.i810_cursor_memory)
agp_free_memory(gtt->i810_cursor_memory);
if (par->i810_gtt.i810_fb_memory)
agp_free_memory(gtt->i810_fb_memory);
if (par->mmio_start_virtual)
iounmap(par->mmio_start_virtual);
if (par->aperture.virtual)
iounmap(par->aperture.virtual);
kfree(par->edid);
if (par->res_flags & FRAMEBUFFER_REQ)
release_mem_region(par->aperture.physical,
par->aperture.size);
if (par->res_flags & MMIO_REQ)
release_mem_region(par->mmio_start_phys, MMIO_SIZE);
framebuffer_release(info);
}
static void __exit i810fb_remove_pci(struct pci_dev *dev)
{
struct fb_info *info = pci_get_drvdata(dev);
struct i810fb_par *par = info->par;
unregister_framebuffer(info);
i810fb_release_resource(info, par);
pci_set_drvdata(dev, NULL);
printk("cleanup_module: unloaded i810 framebuffer device\n");
}
#ifndef MODULE
static int __devinit i810fb_init(void)
{
char *option = NULL;
if (fb_get_options("i810fb", &option))
return -ENODEV;
i810fb_setup(option);
return pci_register_driver(&i810fb_driver);
}
#endif
/*********************************************************************
* Modularization *
*********************************************************************/
#ifdef MODULE
static int __devinit i810fb_init(void)
{
hsync1 *= 1000;
hsync2 *= 1000;
return pci_register_driver(&i810fb_driver);
}
module_param(vram, int, 0);
MODULE_PARM_DESC(vram, "System RAM to allocate to framebuffer in MiB"
" (default=4)");
module_param(voffset, int, 0);
MODULE_PARM_DESC(voffset, "at what offset to place start of framebuffer "
"memory (0 to maximum aperture size), in MiB (default = 48)");
module_param(bpp, int, 0);
MODULE_PARM_DESC(bpp, "Color depth for display in bits per pixel"
" (default = 8)");
module_param(xres, int, 0);
MODULE_PARM_DESC(xres, "Horizontal resolution in pixels (default = 640)");
module_param(yres, int, 0);
MODULE_PARM_DESC(yres, "Vertical resolution in scanlines (default = 480)");
module_param(vyres,int, 0);
MODULE_PARM_DESC(vyres, "Virtual vertical resolution in scanlines"
" (default = 480)");
module_param(hsync1, int, 0);
MODULE_PARM_DESC(hsync1, "Minimum horizontal frequency of monitor in KHz"
" (default = 29)");
module_param(hsync2, int, 0);
MODULE_PARM_DESC(hsync2, "Maximum horizontal frequency of monitor in KHz"
" (default = 30)");
module_param(vsync1, int, 0);
MODULE_PARM_DESC(vsync1, "Minimum vertical frequency of monitor in Hz"
" (default = 50)");
module_param(vsync2, int, 0);
MODULE_PARM_DESC(vsync2, "Maximum vertical frequency of monitor in Hz"
" (default = 60)");
module_param(accel, bool, 0);
MODULE_PARM_DESC(accel, "Use Acceleration (BLIT) engine (default = 0)");
module_param(mtrr, bool, 0);
MODULE_PARM_DESC(mtrr, "Use MTRR (default = 0)");
module_param(extvga, bool, 0);
MODULE_PARM_DESC(extvga, "Enable external VGA connector (default = 0)");
module_param(sync, bool, 0);
MODULE_PARM_DESC(sync, "wait for accel engine to finish drawing"
" (default = 0)");
module_param(dcolor, bool, 0);
MODULE_PARM_DESC(dcolor, "use DirectColor visuals"
" (default = 0 = TrueColor)");
module_param(ddc3, bool, 0);
MODULE_PARM_DESC(ddc3, "Probe DDC bus 3 (default = 0 = no)");
module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "Specify initial video mode");
MODULE_AUTHOR("Tony A. Daplas");
MODULE_DESCRIPTION("Framebuffer device for the Intel 810/815 and"
" compatible cards");
MODULE_LICENSE("GPL");
static void __exit i810fb_exit(void)
{
pci_unregister_driver(&i810fb_driver);
}
module_exit(i810fb_exit);
#endif /* MODULE */
module_init(i810fb_init);
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