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android_kernel_xiaomi_sm8350/drivers/video/i810/i810_main.c
Antonino A. Daplas 595e8a97f4 [PATCH] i810fb: Restore xres and yres option parameters 
If i810fb successfully probed for the EDID, it will disregard the
boot option parameters 'xres' and 'yres'.  Fix this regression.

Excellent testing done by Manuel Lauss <mano@roarinelk.homelinux.net>.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-11 20:43:47 -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/config.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.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 <asm/io.h>
#include <asm/div64.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
#include <asm/page.h>
#include "i810_regs.h"
#include "i810.h"
#include "i810_main.h"
/* 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 __devinitdata;
static int vyres __devinitdata;
static int sync __devinitdata;
static int ext_vga __devinitdata;
static int dcolor __devinitdata;
/*------------------------------------------------------------*/
/**************************************************************
* 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 = (struct i810fb_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 = (struct i810fb_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 = 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 * 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) {
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 = (struct i810fb_par *) info->par;
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
strcpy(fix->id, "I810");
fix->smem_start = par->fb.physical;
fix->smem_len = par->fb.size;
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 = (struct i810fb_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 = (struct i810fb_par *) info->par;
u32 count = atomic_read(&par->use_count);
if (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);
}
atomic_inc(&par->use_count);
return 0;
}
static int i810fb_release(struct fb_info *info, int user)
{
struct i810fb_par *par = (struct i810fb_par *) info->par;
u32 count;
count = atomic_read(&par->use_count);
if (count == 0)
return -EINVAL;
if (count == 1) {
i810_restore_vga_state(par);
restore_vga(&par->state);
}
atomic_dec(&par->use_count);
return 0;
}
static int i810fb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
struct i810fb_par *par = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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 = (struct i810fb_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_KERNEL);
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 state)
{
struct fb_info *info = pci_get_drvdata(dev);
struct i810fb_par *par = (struct i810fb_par *) info->par;
int blank = 0, prev_state = par->cur_state;
if (state.event == prev_state)
return 0;
par->cur_state = state.event;
switch (state.event) {
case 1:
blank = VESA_VSYNC_SUSPEND;
break;
case 2:
blank = VESA_HSYNC_SUSPEND;
break;
case 3:
blank = VESA_POWERDOWN;
break;
default:
return -EINVAL;
}
info->fbops->fb_blank(blank, info);
if (!prev_state) {
agp_unbind_memory(par->i810_gtt.i810_fb_memory);
agp_unbind_memory(par->i810_gtt.i810_cursor_memory);
pci_disable_device(dev);
}
pci_save_state(dev);
pci_set_power_state(dev, pci_choose_state(dev, state));
return 0;
}
static int i810fb_resume(struct pci_dev *dev)
{
struct fb_info *info = pci_get_drvdata(dev);
struct i810fb_par *par = (struct i810fb_par *) info->par;
if (par->cur_state == 0)
return 0;
pci_restore_state(dev);
pci_set_power_state(dev, PCI_D0);
pci_enable_device(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);
info->fbops->fb_blank(VESA_NO_BLANKING, info);
par->cur_state = 0;
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 = (struct i810fb_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 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)
{
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;
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 (ext_vga) {
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;
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 < 3; i++) {
err = i810_probe_i2c_connector(info, &par->edid, i+1);
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) {
if (xres && yres) {
struct fb_videomode *m;
if ((m = fb_find_best_mode(&var, &info->modelist))) {
mode = *m;
found = 1;
}
}
if (!found && specs->misc & FB_MISC_1ST_DETAIL) {
for (i = 0; i < specs->modedb_len; i++) {
if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
mode = specs->modedb[i];
found = 1;
break;
}
}
}
if (!found) {
mode = specs->modedb[0];
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, "ext_vga", 7))
ext_vga = 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
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 = kmalloc(8*1024, GFP_KERNEL))) {
i810fb_release_resource(info, par);
return -ENOMEM;
}
memset(info->pixmap.addr, 0, 8*1024);
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);
encode_fix(&info->fix, info);
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);
if (par->edid)
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);
if (par->res_flags & PCI_DEVICE_ENABLED)
pci_disable_device(par->dev);
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 = (struct i810fb_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(ext_vga, bool, 0);
MODULE_PARM_DESC(ext_vga, "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(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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