hpfb.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:9k
- /*
- * HP300 Topcat framebuffer support (derived from macfb of all things)
- * Phil Blundell <philb@gnu.org> 1998
- *
- * Should this be moved to drivers/dio/video/ ? -- Peter Maydell
- * No! -- Jes
- */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <linux/mm.h>
- #include <linux/tty.h>
- #include <linux/slab.h>
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <linux/fb.h>
- #include <linux/dio.h>
- #include <asm/io.h>
- #include <asm/blinken.h>
- #include <asm/hwtest.h>
- #include <video/fbcon.h>
- #include <video/fbcon-mfb.h>
- #include <video/fbcon-cfb2.h>
- #include <video/fbcon-cfb4.h>
- #include <video/fbcon-cfb8.h>
- static struct display disp;
- static struct fb_info fb_info;
- unsigned long fb_start, fb_size = 1024*768, fb_line_length = 1024;
- unsigned long fb_regs;
- unsigned char fb_bitmask;
- #define TC_WEN 0x4088
- #define TC_REN 0x408c
- #define TC_FBEN 0x4090
- #define TC_NBLANK 0x4080
- /* blitter regs */
- #define BUSY 0x4044
- #define WMRR 0x40ef
- #define SOURCE_X 0x40f2
- #define SOURCE_Y 0x40f6
- #define DEST_X 0x40fa
- #define DEST_Y 0x40fe
- #define WHEIGHT 0x4106
- #define WWIDTH 0x4102
- #define WMOVE 0x409c
- static struct fb_var_screeninfo hpfb_defined = {
- 0,0,0,0, /* W,H, W, H (virtual) load xres,xres_virtual*/
- 0,0, /* virtual -> visible no offset */
- 0, /* depth -> load bits_per_pixel */
- 0, /* greyscale ? */
- {0,2,0}, /* R */
- {0,2,0}, /* G */
- {0,2,0}, /* B */
- {0,0,0}, /* transparency */
- 0, /* standard pixel format */
- FB_ACTIVATE_NOW,
- 274,195, /* 14" monitor */
- FB_ACCEL_NONE,
- 0L,0L,0L,0L,0L,
- 0L,0L,0, /* No sync info */
- FB_VMODE_NONINTERLACED,
- {0,0,0,0,0,0}
- };
- struct hpfb_par
- {
- };
- static int currcon = 0;
- struct hpfb_par current_par;
- static void hpfb_encode_var(struct fb_var_screeninfo *var,
- struct hpfb_par *par)
- {
- int i=0;
- var->xres=1024;
- var->yres=768;
- var->xres_virtual=1024;
- var->yres_virtual=768;
- var->xoffset=0;
- var->yoffset=0;
- var->bits_per_pixel = 1;
- var->grayscale=0;
- var->transp.offset=0;
- var->transp.length=0;
- var->transp.msb_right=0;
- var->nonstd=0;
- var->activate=0;
- var->height= -1;
- var->width= -1;
- var->vmode=FB_VMODE_NONINTERLACED;
- var->pixclock=0;
- var->sync=0;
- var->left_margin=0;
- var->right_margin=0;
- var->upper_margin=0;
- var->lower_margin=0;
- var->hsync_len=0;
- var->vsync_len=0;
- for(i=0;i<ARRAY_SIZE(var->reserved);i++)
- var->reserved[i]=0;
- }
- static void hpfb_get_par(struct hpfb_par *par)
- {
- *par=current_par;
- }
- static int fb_update_var(int con, struct fb_info *info)
- {
- return 0;
- }
- static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
- {
- struct hpfb_par par;
-
- hpfb_get_par(&par);
- hpfb_encode_var(var, &par);
- return 0;
- }
- static int hpfb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
- {
- return 0;
- }
- /*
- * Set the palette. This may not work on all boards but only experimentation will tell.
- * XXX Doesn't work at all.
- */
- static int hpfb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
- {
- unsigned int i;
- for (i = 0; i < cmap->len; i++)
- {
- while (in_be16(fb_regs + 0x6002) & 0x4) udelay(1);
- out_be16(fb_regs + 0x60f0, 0);
- out_be16(fb_regs + 0x60b8, cmap->start + i);
- out_be16(fb_regs + 0x60b2, cmap->red[i]);
- out_be16(fb_regs + 0x60b4, cmap->green[i]);
- out_be16(fb_regs + 0x60b6, cmap->blue[i]);
- out_be16(fb_regs + 0x60f0, 0xff);
- udelay(100);
- }
- out_be16(fb_regs + 0x60ba, 0xffff);
- return 0;
- }
- static int hpfb_get_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
- {
- struct hpfb_par par;
- if(con==-1)
- {
- hpfb_get_par(&par);
- hpfb_encode_var(var, &par);
- }
- else
- *var=fb_display[con].var;
- return 0;
- }
- static int hpfb_set_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
- {
- int err;
-
- if ((err=do_fb_set_var(var, 1)))
- return err;
- return 0;
- }
- static void hpfb_encode_fix(struct fb_fix_screeninfo *fix,
- struct hpfb_par *par)
- {
- memset(fix, 0, sizeof(struct fb_fix_screeninfo));
- strcpy(fix->id, "HP300 Topcat");
- /*
- * X works, but screen wraps ...
- */
- fix->smem_start=fb_start;
- fix->smem_len=fb_size;
- fix->type = FB_TYPE_PACKED_PIXELS;
- fix->visual = FB_VISUAL_PSEUDOCOLOR;
- fix->xpanstep=0;
- fix->ypanstep=0;
- fix->ywrapstep=0;
- fix->line_length=fb_line_length;
- }
- static int hpfb_get_fix(struct fb_fix_screeninfo *fix, int con,
- struct fb_info *info)
- {
- struct hpfb_par par;
- hpfb_get_par(&par);
- hpfb_encode_fix(fix, &par);
- return 0;
- }
- static void topcat_blit(int x0, int y0, int x1, int y1, int w, int h)
- {
- while (in_8(fb_regs + BUSY) & fb_bitmask);
- out_8(fb_regs + WMRR, 0x3);
- out_be16(fb_regs + SOURCE_X, x0);
- out_be16(fb_regs + SOURCE_Y, y0);
- out_be16(fb_regs + DEST_X, x1);
- out_be16(fb_regs + DEST_Y, y1);
- out_be16(fb_regs + WHEIGHT, h);
- out_be16(fb_regs + WWIDTH, w);
- out_8(fb_regs + WMOVE, fb_bitmask);
- }
- static int hpfb_switch(int con, struct fb_info *info)
- {
- do_fb_set_var(&fb_display[con].var,1);
- currcon=con;
- return 0;
- }
- /* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
- static void hpfb_blank(int blank, struct fb_info *info)
- {
- /* Not supported */
- }
- static void hpfb_set_disp(int con)
- {
- struct fb_fix_screeninfo fix;
- struct display *display;
-
- if (con >= 0)
- display = &fb_display[con];
- else
- display = &disp; /* used during initialization */
- hpfb_get_fix(&fix, con, 0);
- display->screen_base = (char *)fix.smem_start;
- display->visual = fix.visual;
- display->type = fix.type;
- display->type_aux = fix.type_aux;
- display->ypanstep = fix.ypanstep;
- display->ywrapstep = fix.ywrapstep;
- display->line_length = fix.line_length;
- display->next_line = fix.line_length;
- display->can_soft_blank = 0;
- display->inverse = 0;
- #ifdef FBCON_HAS_CFB8
- display->dispsw = &fbcon_cfb8;
- #else
- display->dispsw = &fbcon_dummy;
- #endif
- }
- static struct fb_ops hpfb_ops = {
- owner: THIS_MODULE,
- fb_get_fix: hpfb_get_fix,
- fb_get_var: hpfb_get_var,
- fb_set_var: hpfb_set_var,
- fb_get_cmap: hpfb_get_cmap,
- fb_set_cmap: hpfb_set_cmap,
- };
- #define TOPCAT_FBOMSB 0x5d
- #define TOPCAT_FBOLSB 0x5f
- int __init hpfb_init_one(unsigned long base)
- {
- unsigned long fboff;
- fboff = (in_8(base + TOPCAT_FBOMSB) << 8) | in_8(base + TOPCAT_FBOLSB);
- fb_start = 0xf0000000 | (in_8(base + fboff) << 16);
- fb_regs = base;
- #if 0
- /* This is the magic incantation NetBSD uses to make Catseye boards work. */
- out_8(base+0x4800, 0);
- out_8(base+0x4510, 0);
- out_8(base+0x4512, 0);
- out_8(base+0x4514, 0);
- out_8(base+0x4516, 0);
- out_8(base+0x4206, 0x90);
- #endif
- /*
- * Fill in the available video resolution
- */
-
- hpfb_defined.xres = 1024;
- hpfb_defined.yres = 768;
- hpfb_defined.xres_virtual = 1024;
- hpfb_defined.yres_virtual = 768;
- hpfb_defined.bits_per_pixel = 8;
- /*
- * Give the hardware a bit of a prod and work out how many bits per
- * pixel are supported.
- */
-
- out_8(base + TC_WEN, 0xff);
- out_8(base + TC_FBEN, 0xff);
- out_8(fb_start, 0xff);
- fb_bitmask = in_8(fb_start);
- /*
- * Enable reading/writing of all the planes.
- */
- out_8(base + TC_WEN, fb_bitmask);
- out_8(base + TC_REN, fb_bitmask);
- out_8(base + TC_FBEN, fb_bitmask);
- out_8(base + TC_NBLANK, 0x1);
- /*
- * Let there be consoles..
- */
- strcpy(fb_info.modename, "Topcat");
- fb_info.changevar = NULL;
- fb_info.node = -1;
- fb_info.fbops = &hpfb_ops;
- fb_info.disp = &disp;
- fb_info.switch_con = &hpfb_switch;
- fb_info.updatevar = &fb_update_var;
- fb_info.blank = &hpfb_blank;
- fb_info.flags = FBINFO_FLAG_DEFAULT;
- do_fb_set_var(&hpfb_defined, 1);
- hpfb_get_var(&disp.var, -1, &fb_info);
- hpfb_set_disp(-1);
- if (register_framebuffer(&fb_info) < 0)
- return 1;
- return 0;
- }
- /*
- * Check that the secondary ID indicates that we have some hope of working with this
- * framebuffer. The catseye boards are pretty much like topcats and we can muddle through.
- */
- #define topcat_sid_ok(x) (((x) == DIO_ID2_LRCATSEYE) || ((x) == DIO_ID2_HRCCATSEYE)
- || ((x) == DIO_ID2_HRMCATSEYE) || ((x) == DIO_ID2_TOPCAT))
- /*
- * Initialise the framebuffer
- */
- int __init hpfb_init(void)
- {
- unsigned int sid;
- /* Topcats can be on the internal IO bus or real DIO devices.
- * The internal variant sits at 0xf0560000; it has primary
- * and secondary ID registers just like the DIO version.
- * So we merge the two detection routines.
- *
- * Perhaps this #define should be in a global header file:
- * I believe it's common to all internal fbs, not just topcat.
- */
- #define INTFBADDR 0xf0560000
- if (hwreg_present((void *)INTFBADDR) && (DIO_ID(INTFBADDR) == DIO_ID_FBUFFER)
- && topcat_sid_ok(sid = DIO_SECID(INTFBADDR)))
- {
- printk("Internal Topcat found (secondary id %02x)n", sid);
- hpfb_init_one(INTFBADDR);
- }
- else
- {
- int sc = dio_find(DIO_ID_FBUFFER);
- if (sc)
- {
- unsigned long addr = (unsigned long)dio_scodetoviraddr(sc);
- unsigned int sid = DIO_SECID(addr);
- if (topcat_sid_ok(sid))
- {
- printk("Topcat found at DIO select code %02x "
- "(secondary id %02x)n", sc, sid);
- hpfb_init_one(addr);
- }
- }
- }
- return 0;
- }
- MODULE_LICENSE("GPL");