/* * valkyriefb.c -- frame buffer device for the PowerMac 'valkyrie' display * * Created 8 August 1998 by * Martin Costabel <costabel@wanadoo.fr> and Kevin Schoedel * * Vmode-switching changes and vmode 15/17 modifications created 29 August * 1998 by Barry K. Nathan <barryn@pobox.com>. * * Ported to m68k Macintosh by David Huggins-Daines <dhd@debian.org> * * Derived directly from: * * controlfb.c -- frame buffer device for the PowerMac 'control' display * Copyright (C) 1998 Dan Jacobowitz <dan@debian.org> * * pmc-valkyrie.c -- Console support for PowerMac "valkyrie" display adaptor. * Copyright (C) 1997 Paul Mackerras. * * and indirectly: * * Frame buffer structure from: * drivers/video/chipsfb.c -- frame buffer device for * Chips & Technologies 65550 chip. * * Copyright (C) 1998 Paul Mackerras * * This file is derived from the Powermac "chips" driver: * Copyright (C) 1997 Fabio Riccardi. * And from the frame buffer device for Open Firmware-initialized devices: * Copyright (C) 1997 Geert Uytterhoeven. * * Hardware information from: * control.c: Console support for PowerMac "control" display adaptor. * Copyright (C) 1996 Paul Mackerras * * 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/vmalloc.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/fb.h> #include <linux/selection.h> #include <linux/init.h> #include <linux/nvram.h> #include <linux/adb.h> #include <linux/cuda.h> #include <asm/io.h> #ifdef CONFIG_MAC #include <asm/bootinfo.h> #include <asm/macintosh.h> #else #include <asm/prom.h> #endif #include <asm/pgtable.h> #include "macmodes.h" #include "valkyriefb.h" #ifdef CONFIG_MAC /* We don't yet have functions to read the PRAM... perhaps we can adapt them from the PPC code? */ static int default_vmode = VMODE_CHOOSE; static int default_cmode = CMODE_8; #else static int default_vmode = VMODE_NVRAM; static int default_cmode = CMODE_NVRAM; #endif struct fb_par_valkyrie { int vmode, cmode; int xres, yres; int vxres, vyres; struct valkyrie_regvals *init; }; struct fb_info_valkyrie { struct fb_info info; struct fb_par_valkyrie par; struct cmap_regs __iomem *cmap_regs; unsigned long cmap_regs_phys; struct valkyrie_regs __iomem *valkyrie_regs; unsigned long valkyrie_regs_phys; __u8 __iomem *frame_buffer; unsigned long frame_buffer_phys; int sense; unsigned long total_vram; u32 pseudo_palette[16]; }; /* * Exported functions */ int valkyriefb_init(void); int valkyriefb_setup(char*); static int valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info); static int valkyriefb_set_par(struct fb_info *info); static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, u_int transp, struct fb_info *info); static int valkyriefb_blank(int blank_mode, struct fb_info *info); static int read_valkyrie_sense(struct fb_info_valkyrie *p); static void set_valkyrie_clock(unsigned char *params); static int valkyrie_var_to_par(struct fb_var_screeninfo *var, struct fb_par_valkyrie *par, const struct fb_info *fb_info); static int valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p); static void valkyrie_par_to_fix(struct fb_par_valkyrie *par, struct fb_fix_screeninfo *fix); static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p); static struct fb_ops valkyriefb_ops = { .owner = THIS_MODULE, .fb_check_var = valkyriefb_check_var, .fb_set_par = valkyriefb_set_par, .fb_setcolreg = valkyriefb_setcolreg, .fb_blank = valkyriefb_blank, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, }; /* Sets the video mode according to info->var */ static int valkyriefb_set_par(struct fb_info *info) { struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info; volatile struct valkyrie_regs __iomem *valkyrie_regs = p->valkyrie_regs; struct fb_par_valkyrie *par = info->par; struct valkyrie_regvals *init; int err; if ((err = valkyrie_var_to_par(&info->var, par, info))) return err; valkyrie_par_to_fix(par, &info->fix); /* Reset the valkyrie */ out_8(&valkyrie_regs->status.r, 0); udelay(100); /* Initialize display timing registers */ init = par->init; out_8(&valkyrie_regs->mode.r, init->mode | 0x80); out_8(&valkyrie_regs->depth.r, par->cmode + 3); set_valkyrie_clock(init->clock_params); udelay(100); /* Turn on display */ out_8(&valkyrie_regs->mode.r, init->mode); return 0; } static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par, struct fb_var_screeninfo *var) { return mac_vmode_to_var(par->vmode, par->cmode, var); } static int valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { int err; struct fb_par_valkyrie par; if ((err = valkyrie_var_to_par(var, &par, info))) return err; valkyrie_par_to_var(&par, var); return 0; } /* * Blank the screen if blank_mode != 0, else unblank. If blank_mode == NULL * then the caller blanks by setting the CLUT (Color Look Up Table) to all * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due * to e.g. a video mode which doesn't support it. Implements VESA suspend * and powerdown modes on hardware that supports disabling hsync/vsync: * blank_mode == 2: suspend vsync * blank_mode == 3: suspend hsync * blank_mode == 4: powerdown */ static int valkyriefb_blank(int blank_mode, struct fb_info *info) { struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info; struct fb_par_valkyrie *par = info->par; struct valkyrie_regvals *init = par->init; if (init == NULL) return 1; switch (blank_mode) { case FB_BLANK_UNBLANK: /* unblank */ out_8(&p->valkyrie_regs->mode.r, init->mode); break; case FB_BLANK_NORMAL: return 1; /* get caller to set CLUT to all black */ case FB_BLANK_VSYNC_SUSPEND: case FB_BLANK_HSYNC_SUSPEND: /* * [kps] Value extracted from MacOS. I don't know * whether this bit disables hsync or vsync, or * whether the hardware can do the other as well. */ out_8(&p->valkyrie_regs->mode.r, init->mode | 0x40); break; case FB_BLANK_POWERDOWN: out_8(&p->valkyrie_regs->mode.r, 0x66); break; } return 0; } static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, u_int transp, struct fb_info *info) { struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info; volatile struct cmap_regs __iomem *cmap_regs = p->cmap_regs; struct fb_par_valkyrie *par = info->par; if (regno > 255) return 1; red >>= 8; green >>= 8; blue >>= 8; /* tell clut which address to fill */ out_8(&p->cmap_regs->addr, regno); udelay(1); /* send one color channel at a time */ out_8(&cmap_regs->lut, red); out_8(&cmap_regs->lut, green); out_8(&cmap_regs->lut, blue); if (regno < 16 && par->cmode == CMODE_16) ((u32 *)info->pseudo_palette)[regno] = (regno << 10) | (regno << 5) | regno; return 0; } static inline int valkyrie_vram_reqd(int video_mode, int color_mode) { int pitch; struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1]; if ((pitch = init->pitch[color_mode]) == 0) pitch = 2 * init->pitch[0]; return init->vres * pitch; } static void set_valkyrie_clock(unsigned char *params) { struct adb_request req; int i; #ifdef CONFIG_ADB_CUDA for (i = 0; i < 3; ++i) { cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC, 0x50, i + 1, params[i]); while (!req.complete) cuda_poll(); } #endif } static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p) { p->sense = read_valkyrie_sense(p); printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense); /* Try to pick a video mode out of NVRAM if we have one. */ #if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM) if (default_vmode == VMODE_NVRAM) { default_vmode = nvram_read_byte(NV_VMODE); if (default_vmode <= 0 || default_vmode > VMODE_MAX || !valkyrie_reg_init[default_vmode - 1]) default_vmode = VMODE_CHOOSE; } #endif if (default_vmode == VMODE_CHOOSE) default_vmode = mac_map_monitor_sense(p->sense); if (!valkyrie_reg_init[default_vmode - 1]) default_vmode = VMODE_640_480_67; #if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM) if (default_cmode == CMODE_NVRAM) default_cmode = nvram_read_byte(NV_CMODE); #endif /* * Reduce the pixel size if we don't have enough VRAM or bandwidth. */ if (default_cmode < CMODE_8 || default_cmode > CMODE_16 || valkyrie_reg_init[default_vmode-1]->pitch[default_cmode] == 0 || valkyrie_vram_reqd(default_vmode, default_cmode) > p->total_vram) default_cmode = CMODE_8; printk(KERN_INFO "using video mode %d and color mode %d.\n", default_vmode, default_cmode); } int __init valkyriefb_init(void) { struct fb_info_valkyrie *p; unsigned long frame_buffer_phys, cmap_regs_phys, flags; int err; char *option = NULL; if (fb_get_options("valkyriefb", &option)) return -ENODEV; valkyriefb_setup(option); #ifdef CONFIG_MAC if (!MACH_IS_MAC) return -ENODEV; if (!(mac_bi_data.id == MAC_MODEL_Q630 /* I'm not sure about this one */ || mac_bi_data.id == MAC_MODEL_P588)) return -ENODEV; /* Hardcoded addresses... welcome to 68k Macintosh country :-) */ frame_buffer_phys = 0xf9000000; cmap_regs_phys = 0x50f24000; flags = IOMAP_NOCACHE_SER; /* IOMAP_WRITETHROUGH?? */ #else /* ppc (!CONFIG_MAC) */ { struct device_node *dp; struct resource r; dp = of_find_node_by_name(NULL, "valkyrie"); if (dp == 0) return 0; if (of_address_to_resource(dp, 0, &r)) { printk(KERN_ERR "can't find address for valkyrie\n"); return 0; } frame_buffer_phys = r.start; cmap_regs_phys = r.start + 0x304000; flags = _PAGE_WRITETHRU; } #endif /* ppc (!CONFIG_MAC) */ p = kzalloc(sizeof(*p), GFP_ATOMIC); if (p == 0) return -ENOMEM; /* Map in frame buffer and registers */ if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) { kfree(p); return 0; } p->total_vram = 0x100000; p->frame_buffer_phys = frame_buffer_phys; p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags); p->cmap_regs_phys = cmap_regs_phys; p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000); p->valkyrie_regs_phys = cmap_regs_phys+0x6000; p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000); err = -ENOMEM; if (p->frame_buffer == NULL || p->cmap_regs == NULL || p->valkyrie_regs == NULL) { printk(KERN_ERR "valkyriefb: couldn't map resources\n"); goto out_free; } valkyrie_choose_mode(p); mac_vmode_to_var(default_vmode, default_cmode, &p->info.var); err = valkyrie_init_info(&p->info, p); if (err < 0) goto out_free; valkyrie_init_fix(&p->info.fix, p); if (valkyriefb_set_par(&p->info)) /* "can't happen" */ printk(KERN_ERR "valkyriefb: can't set default video mode\n"); if ((err = register_framebuffer(&p->info)) != 0) goto out_cmap_free; printk(KERN_INFO "fb%d: valkyrie frame buffer device\n", p->info.node); return 0; out_cmap_free: fb_dealloc_cmap(&p->info.cmap); out_free: if (p->frame_buffer) iounmap(p->frame_buffer); if (p->cmap_regs) iounmap(p->cmap_regs); if (p->valkyrie_regs) iounmap(p->valkyrie_regs); kfree(p); return err; } /* * Get the monitor sense value. */ static int read_valkyrie_sense(struct fb_info_valkyrie *p) { int sense, in; out_8(&p->valkyrie_regs->msense.r, 0); /* release all lines */ __delay(20000); sense = ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x70) << 4; /* drive each sense line low in turn and collect the other 2 */ out_8(&p->valkyrie_regs->msense.r, 4); /* drive A low */ __delay(20000); sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x30); out_8(&p->valkyrie_regs->msense.r, 2); /* drive B low */ __delay(20000); sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x40) >> 3; sense |= (in & 0x10) >> 2; out_8(&p->valkyrie_regs->msense.r, 1); /* drive C low */ __delay(20000); sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x60) >> 5; out_8(&p->valkyrie_regs->msense.r, 7); return sense; } /* * This routine takes a user-supplied var, * and picks the best vmode/cmode from it. */ /* [bkn] I did a major overhaul of this function. * * Much of the old code was "swiped by jonh from atyfb.c". Because * macmodes has mac_var_to_vmode, I felt that it would be better to * rework this function to use that, instead of reinventing the wheel to * add support for vmode 17. This was reinforced by the fact that * the previously swiped atyfb.c code is no longer there. * * So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing * most, but not all, of the old code in the process. One side benefit of * swiping the platinumfb code is that we now have more comprehensible error * messages when a vmode/cmode switch fails. (Most of the error messages are * platinumfb.c, but I added two of my own, and I also changed some commas * into colons to make the messages more consistent with other Linux error * messages.) In addition, I think the new code *might* fix some vmode- * switching oddities, but I'm not sure. * * There may be some more opportunities for cleanup in here, but this is a * good start... */ static int valkyrie_var_to_par(struct fb_var_screeninfo *var, struct fb_par_valkyrie *par, const struct fb_info *fb_info) { int vmode, cmode; struct valkyrie_regvals *init; struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) fb_info; if (mac_var_to_vmode(var, &vmode, &cmode) != 0) { printk(KERN_ERR "valkyriefb: can't do %dx%dx%d.\n", var->xres, var->yres, var->bits_per_pixel); return -EINVAL; } /* Check if we know about the wanted video mode */ if (vmode < 1 || vmode > VMODE_MAX || !valkyrie_reg_init[vmode-1]) { printk(KERN_ERR "valkyriefb: vmode %d not valid.\n", vmode); return -EINVAL; } if (cmode != CMODE_8 && cmode != CMODE_16) { printk(KERN_ERR "valkyriefb: cmode %d not valid.\n", cmode); return -EINVAL; } if (var->xres_virtual > var->xres || var->yres_virtual > var->yres || var->xoffset != 0 || var->yoffset != 0) { return -EINVAL; } init = valkyrie_reg_init[vmode-1]; if (init->pitch[cmode] == 0) { printk(KERN_ERR "valkyriefb: vmode %d does not support " "cmode %d.\n", vmode, cmode); return -EINVAL; } if (valkyrie_vram_reqd(vmode, cmode) > p->total_vram) { printk(KERN_ERR "valkyriefb: not enough ram for vmode %d, " "cmode %d.\n", vmode, cmode); return -EINVAL; } par->vmode = vmode; par->cmode = cmode; par->init = init; par->xres = var->xres; par->yres = var->yres; par->vxres = par->xres; par->vyres = par->yres; return 0; } static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p) { memset(fix, 0, sizeof(*fix)); strcpy(fix->id, "valkyrie"); fix->mmio_start = p->valkyrie_regs_phys; fix->mmio_len = sizeof(struct valkyrie_regs); fix->type = FB_TYPE_PACKED_PIXELS; fix->smem_start = p->frame_buffer_phys + 0x1000; fix->smem_len = p->total_vram; fix->type_aux = 0; fix->ywrapstep = 0; fix->ypanstep = 0; fix->xpanstep = 0; } /* Fix must already be inited above */ static void valkyrie_par_to_fix(struct fb_par_valkyrie *par, struct fb_fix_screeninfo *fix) { fix->smem_len = valkyrie_vram_reqd(par->vmode, par->cmode); fix->visual = (par->cmode == CMODE_8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR; fix->line_length = par->vxres << par->cmode; /* ywrapstep, xpanstep, ypanstep */ } static int __init valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p) { info->fbops = &valkyriefb_ops; info->screen_base = p->frame_buffer + 0x1000; info->flags = FBINFO_DEFAULT; info->pseudo_palette = p->pseudo_palette; info->par = &p->par; return fb_alloc_cmap(&info->cmap, 256, 0); } /* * Parse user specified options (`video=valkyriefb:') */ int __init valkyriefb_setup(char *options) { char *this_opt; if (!options || !*options) return 0; while ((this_opt = strsep(&options, ",")) != NULL) { if (!strncmp(this_opt, "vmode:", 6)) { int vmode = simple_strtoul(this_opt+6, NULL, 0); if (vmode > 0 && vmode <= VMODE_MAX) default_vmode = vmode; } else if (!strncmp(this_opt, "cmode:", 6)) { int depth = simple_strtoul(this_opt+6, NULL, 0); switch (depth) { case 8: default_cmode = CMODE_8; break; case 15: case 16: default_cmode = CMODE_16; break; } } } return 0; } module_init(valkyriefb_init); MODULE_LICENSE("GPL");