atyfb_base.c

linux-2.4.29操作系统的源码

/*
 *  ATI Frame Buffer Device Driver Core
 *
 *      Copyright (C) 1997-2001  Geert Uytterhoeven
 *      Copyright (C) 1998  Bernd Harries
 *      Copyright (C) 1998  Eddie C. Dost  ([e-mail])
 *
 *  This driver supports the following ATI graphics chips:
 *    - ATI Mach64
 *
 *  To do: add support for
 *    - ATI Rage128 (from aty128fb.c)
 *    - ATI Radeon (from radeonfb.c)
 *
 *  This driver is partly based on the PowerMac console driver:
 *
 *      Copyright (C) 1996 Paul Mackerras
 *
 *  and on the PowerMac ATI/mach64 display driver:
 *
 *      Copyright (C) 1997 Michael AK Tesch
 *
 *            with work by Jon Howell
 *                         Harry AC Eaton
 *                         Anthony Tong <[e-mail]>
 *
 *  Generic LCD support written by Daniel Mantione
 *
 *  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.
 *  
 *  Many thanks to Nitya from ATI devrel for support and patience !
 */

/******************************************************************************

  TODO:

    - cursor support on all cards and all ramdacs.
    - cursor parameters controlable via ioctl()s.
    - guess PLL and MCLK based on the original PLL register values initialized
      by the BIOS or Open Firmware (if they are initialized).

                                                (Anyone to help with this?)

******************************************************************************/


#include <linux/config.h>
#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/vmalloc.h>
#include <linux/delay.h>
#include <linux/selection.h>
#include <linux/console.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/vt_kern.h>
#include <linux/kd.h>

#include <asm/io.h>
#include <asm/uaccess.h>

#include <video/fbcon.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-cfb24.h>
#include <video/fbcon-cfb32.h>

#include "mach64.h"
#include "atyfb.h"

#ifdef __powerpc__
#include <asm/prom.h>
#include <video/macmodes.h>
#endif
#ifdef __sparc__
#include <asm/pbm.h>
#include <asm/fbio.h>
#endif

#ifdef CONFIG_ADB_PMU
#include <linux/adb.h>
#include <linux/pmu.h>
#endif
#ifdef CONFIG_BOOTX_TEXT
#include <asm/btext.h>
#endif
#ifdef CONFIG_NVRAM
#include <linux/nvram.h>
#endif
#ifdef CONFIG_FB_COMPAT_XPMAC
#include <asm/vc_ioctl.h>
#endif
#ifdef CONFIG_PMAC_BACKLIGHT
#include <asm/backlight.h>
#endif


/*
 * Debug flags.
 */
#undef DEBUG

/* Make sure n * PAGE_SIZE is protected at end of Aperture for GUI-regs */
/*  - must be large enough to catch all GUI-Regs   */
/*  - must be aligned to a PAGE boundary           */
#define GUI_RESERVE     (1 * PAGE_SIZE)


/* FIXME: remove the FAIL definition */
#define FAIL(x) do { printk(x "\n"); return -EINVAL; } while (0)

    /*
     *  The Hardware parameters for each card
     */

struct aty_cmap_regs {
    u8 windex;
    u8 lut;
    u8 mask;
    u8 rindex;
    u8 cntl;
};

struct pci_mmap_map {
    unsigned long voff;
    unsigned long poff;
    unsigned long size;
    unsigned long prot_flag;
    unsigned long prot_mask;
};


    /*
     *  Frame buffer device API
     */

static int atyfb_open(struct fb_info *info, int user);
static int atyfb_release(struct fb_info *info, int user);
static int atyfb_get_fix(struct fb_fix_screeninfo *fix, int con,
                         struct fb_info *fb);
static int atyfb_get_var(struct fb_var_screeninfo *var, int con,
                         struct fb_info *fb);
static int atyfb_set_var(struct fb_var_screeninfo *var, int con,
                         struct fb_info *fb);
static int atyfb_pan_display(struct fb_var_screeninfo *var, int con,
                             struct fb_info *fb);
static int atyfb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
                          struct fb_info *info);
static int atyfb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
                          struct fb_info *info);
static int atyfb_ioctl(struct inode *inode, struct file *file, u_int cmd,
                       u_long arg, int con, struct fb_info *info);
#ifdef __sparc__
static int atyfb_mmap(struct fb_info *info, struct file *file,
                      struct vm_area_struct *vma);
#endif
static int atyfb_rasterimg(struct fb_info *info, int start);


    /*
     *  Interface to the low level console driver
     */

static int atyfbcon_switch(int con, struct fb_info *fb);
static int atyfbcon_updatevar(int con, struct fb_info *fb);
static void atyfbcon_blank(int blank, struct fb_info *fb);


    /*
     *  Internal routines
     */

static int aty_init(struct fb_info_aty *info, const char *name);
#ifdef CONFIG_ATARI
static int store_video_par(char *videopar, unsigned char m64_num);
static char *strtoke(char *s, const char *ct);
#endif

static void aty_set_crtc(const struct fb_info_aty *info,
                         const struct crtc *crtc);
static int aty_var_to_crtc(const struct fb_info_aty *info,
                           const struct fb_var_screeninfo *var,
                           struct crtc *crtc, u32 *monitors_enabled);
static int aty_crtc_to_var(const struct crtc *crtc,
                           struct fb_var_screeninfo *var);

static void atyfb_set_par(const struct atyfb_par *par,
                          struct fb_info_aty *info);
static int atyfb_decode_var(const struct fb_var_screeninfo *var,
                            struct atyfb_par *par,
                            const struct fb_info_aty *info,
                            u32 monitors_enabled);
static int atyfb_encode_var(struct fb_var_screeninfo *var,
                            const struct atyfb_par *par,
                            const struct fb_info_aty *info);
static void set_off_pitch(struct atyfb_par *par,
                          const struct fb_info_aty *info);
static int encode_fix(struct fb_fix_screeninfo *fix,
                      const struct atyfb_par *par,
                      const struct fb_info_aty *info);
static void atyfb_set_dispsw(struct display *disp, struct fb_info_aty *info,
                             int bpp, int accel);
static int atyfb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
                         u_int *transp, struct fb_info *fb);
static int atyfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
                         u_int transp, struct fb_info *fb);
static void do_install_cmap(int con, struct fb_info *info);
#ifdef CONFIG_PPC
static int read_aty_sense(const struct fb_info_aty *info);
#endif


    /*
     *  Interface used by the world
     */

int atyfb_init(void);
#ifndef MODULE
int atyfb_setup(char*);
#endif

static int currcon = 0;

static struct fb_ops atyfb_ops = {
        owner:          THIS_MODULE,
        fb_open:        atyfb_open,
        fb_release:     atyfb_release,
        fb_get_fix:     atyfb_get_fix,
        fb_get_var:     atyfb_get_var,
        fb_set_var:     atyfb_set_var,
        fb_get_cmap:    atyfb_get_cmap,
        fb_set_cmap:    atyfb_set_cmap,
        fb_pan_display: atyfb_pan_display,
        fb_ioctl:       atyfb_ioctl,
#ifdef __sparc__
        fb_mmap:        atyfb_mmap,
#endif
        fb_rasterimg:   atyfb_rasterimg,
};

static char atyfb_name[16] = "ATY Mach64";
static char fontname[40] __initdata = { 0 };
static char curblink __initdata = 1;
static char noaccel __initdata = 0;
static u32 default_vram __initdata = 0;
static int default_pll __initdata = 0;
static int default_mclk __initdata = 0;
static int default_xclk __initdata = 0;

#ifndef MODULE
static char *mode_option __initdata = NULL;
#endif

#ifdef CONFIG_PPC
#ifndef CONFIG_NVRAM
static int default_vmode __initdata = VMODE_NVRAM;
static int default_cmode __initdata = CMODE_NVRAM;
#else
static int default_vmode __initdata = VMODE_CHOOSE;
static int default_cmode __initdata = CMODE_CHOOSE;
#endif
#endif

#ifdef CONFIG_ATARI
static unsigned int mach64_count __initdata = 0;
static unsigned long phys_vmembase[FB_MAX] __initdata = { 0, };
static unsigned long phys_size[FB_MAX] __initdata = { 0, };
static unsigned long phys_guiregbase[FB_MAX] __initdata = { 0, };
#endif

#ifdef CONFIG_FB_ATY_GX
static char m64n_gx[] __initdata = "mach64GX (ATI888GX00)";
static char m64n_cx[] __initdata = "mach64CX (ATI888CX00)";
#endif /* CONFIG_FB_ATY_GX */

#ifdef CONFIG_FB_ATY_CT
static char m64n_ct[] __initdata = "mach64CT (ATI264CT)";
static char m64n_et[] __initdata = "mach64ET (ATI264ET)";
static char m64n_vta3[] __initdata = "mach64VTA3 (ATI264VT)";
static char m64n_vta4[] __initdata = "mach64VTA4 (ATI264VT)";
static char m64n_vtb[] __initdata = "mach64VTB (ATI264VTB)";
static char m64n_vt4[] __initdata = "mach64VT4 (ATI264VT4)";
static char m64n_gt[] __initdata = "3D RAGE (GT)";
static char m64n_gtb[] __initdata = "3D RAGE II+ (GTB)";
static char m64n_iic_p[] __initdata = "3D RAGE IIC (PCI)";
static char m64n_iic_a[] __initdata = "3D RAGE IIC (AGP)";
static char m64n_lt[] __initdata = "3D RAGE LT";
static char m64n_ltg[] __initdata = "3D RAGE LT-G";
static char m64n_gtc_ba[] __initdata = "3D RAGE PRO (BGA, AGP)";
static char m64n_gtc_ba1[] __initdata = "3D RAGE PRO (BGA, AGP, 1x only)";
static char m64n_gtc_bp[] __initdata = "3D RAGE PRO (BGA, PCI)";
static char m64n_gtc_pp[] __initdata = "3D RAGE PRO (PQFP, PCI)";
static char m64n_gtc_ppl[] __initdata = "3D RAGE PRO (PQFP, PCI, limited 3D)";
static char m64n_xl[] __initdata = "3D RAGE (XL)";
static char m64n_ltp_a[] __initdata = "3D RAGE LT PRO (AGP)";
static char m64n_ltp_p[] __initdata = "3D RAGE LT PRO (PCI)";
static char m64n_mob_p[] __initdata = "3D RAGE Mobility (PCI)";
static char m64n_mob_a[] __initdata = "3D RAGE Mobility (AGP)";
#endif /* CONFIG_FB_ATY_CT */

static struct {
    u16 pci_id, chip_type;
    u8 rev_mask, rev_val;
    const char *name;
    int pll, mclk, xclk;
    u32 features;
} aty_chips[] __initdata = {
    /* Note to kernel maintainers: Please REFUSE any patch to change a clock rate,
       unless someone proves that a value is incorrect for him with a dump of
       the driver information table in the BIOS. Patches accepted in the past have
       caused chips to be overclocked by as much as 50%!
       
       Even in the case the table appear to be wrong, do not simply change the value
       in the table. Ask about the chip revision the person uses and *add* an entry.
       It's also often a good idea to contact ATi.
       
       Lastly, third party board vendors might use different memory clocks
       than ATi. An example of this is the Apple iBook1 which is handled specially
       in aty_init.
       
       (Daniel Mantione, 26 June 2003)
     */
#ifdef CONFIG_FB_ATY_GX
    /* Mach64 GX */
    { 0x4758, 0x00d7, 0x00, 0x00, m64n_gx,      135,  50,  50, M64F_GX },
    { 0x4358, 0x0057, 0x00, 0x00, m64n_cx,      135,  50,  50, M64F_GX },
#endif /* CONFIG_FB_ATY_GX */

#ifdef CONFIG_FB_ATY_CT
    /* Mach64 CT */
    { 0x4354, 0x4354, 0x00, 0x00, m64n_ct,      135,  60,  60, M64F_CT | M64F_INTEGRATED | M64F_CT_BUS | M64F_MAGIC_FIFO },
    { 0x4554, 0x4554, 0x00, 0x00, m64n_et,      135,  60,  60, M64F_CT | M64F_INTEGRATED | M64F_CT_BUS | M64F_MAGIC_FIFO },

    /* Mach64 VT */
    { 0x5654, 0x5654, 0xc7, 0x00, m64n_vta3,    170,  67,  67, M64F_VT | M64F_INTEGRATED | M64F_VT_BUS | M64F_MAGIC_FIFO | M64F_FIFO_24 },
    { 0x5654, 0x5654, 0xc7, 0x40, m64n_vta4,    200,  67,  67, M64F_VT | M64F_INTEGRATED | M64F_VT_BUS | M64F_MAGIC_FIFO | M64F_FIFO_24 | M64F_MAGIC_POSTDIV },
    { 0x5654, 0x5654, 0x00, 0x00, m64n_vtb,     200,  67,  67, M64F_VT | M64F_INTEGRATED | M64F_VT_BUS | M64F_GTB_DSP | M64F_FIFO_24 },
    { 0x5655, 0x5655, 0x00, 0x00, m64n_vtb,     200,  67,  67, M64F_VT | M64F_INTEGRATED | M64F_VT_BUS | M64F_GTB_DSP | M64F_FIFO_24 | M64F_SDRAM_MAGIC_PLL },
    { 0x5656, 0x5656, 0x00, 0x00, m64n_vt4,     230,  83,  83, M64F_VT | M64F_INTEGRATED | M64F_GTB_DSP },

    /* Mach64 GT (3D RAGE) */
    { 0x4754, 0x4754, 0x07, 0x00, m64n_gt,      135,  63,  63, M64F_GT | M64F_INTEGRATED | M64F_MAGIC_FIFO | M64F_FIFO_24 | M64F_EXTRA_BRIGHT },
    { 0x4754, 0x4754, 0x07, 0x01, m64n_gt,      170,  67,  67, M64F_GT | M64F_INTEGRATED | M64F_GTB_DSP | M64F_FIFO_24 | M64F_SDRAM_MAGIC_PLL | M64F_EXTRA_BRIGHT },
    { 0x4754, 0x4754, 0x07, 0x02, m64n_gt,      200,  67,  67, M64F_GT | M64F_INTEGRATED | M64F_GTB_DSP | M64F_FIFO_24 | M64F_SDRAM_MAGIC_PLL | M64F_EXTRA_BRIGHT },
    { 0x4755, 0x4755, 0x00, 0x00, m64n_gtb,     200,  67,  67, M64F_GT | M64F_INTEGRATED | M64F_GTB_DSP | M64F_FIFO_24 | M64F_SDRAM_MAGIC_PLL | M64F_EXTRA_BRIGHT },
    { 0x4756, 0x4756, 0x00, 0x00, m64n_iic_p,   230,  83,  83, M64F_GT | M64F_INTEGRATED | M64F_GTB_DSP | M64F_FIFO_24 | M64F_SDRAM_MAGIC_PLL | M64F_EXTRA_BRIGHT },
    { 0x4757, 0x4757, 0x00, 0x00, m64n_iic_a,   230,  83,  83, M64F_GT | M64F_INTEGRATED | M64F_GTB_DSP | M64F_FIFO_24 | M64F_SDRAM_MAGIC_PLL | M64F_EXTRA_BRIGHT },
    { 0x475a, 0x475a, 0x00, 0x00, m64n_iic_a,   230,  83,  83, M64F_GT | M64F_INTEGRATED | M64F_GTB_DSP | M64F_FIFO_24 | M64F_SDRAM_MAGIC_PLL | M64F_EXTRA_BRIGHT },

    /* Mach64 LT */
    { 0x4c54, 0x4c54, 0x00, 0x00, m64n_lt,      135,  63,  63, M64F_GT | M64F_INTEGRATED | M64F_GTB_DSP },
    { 0x4c47, 0x4c47, 0x00, 0x00, m64n_ltg,     230,  63,  63, M64F_GT | M64F_INTEGRATED | M64F_GTB_DSP | M64F_SDRAM_MAGIC_PLL | M64F_EXTRA_BRIGHT | M64F_LT_SLEEP | M64F_G3_PB_1024x768 | M64F_FIFO_24 },