| /* |
| * 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> |
| #ifdef CONFIG_MAC |
| #include <asm/macintosh.h> |
| #else |
| #include <asm/prom.h> |
| #endif |
| |
| #include "macmodes.h" |
| #include "valkyriefb.h" |
| |
| static int default_vmode = VMODE_NVRAM; |
| static int default_cmode = CMODE_NVRAM; |
| |
| 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 = |
| container_of(info, 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 = |
| container_of(info, 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 = |
| container_of(info, 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) |
| { |
| #ifdef CONFIG_ADB_CUDA |
| struct adb_request req; |
| int i; |
| |
| 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. */ |
| #ifdef CONFIG_PPC_PMAC |
| if (IS_REACHABLE(CONFIG_NVRAM) && default_vmode == VMODE_NVRAM) |
| default_vmode = nvram_read_byte(NV_VMODE); |
| #endif |
| if (default_vmode <= 0 || default_vmode > VMODE_MAX || |
| !valkyrie_reg_init[default_vmode - 1]) { |
| default_vmode = mac_map_monitor_sense(p->sense); |
| if (!valkyrie_reg_init[default_vmode - 1]) |
| default_vmode = VMODE_640_480_67; |
| } |
| |
| #ifdef CONFIG_PPC_PMAC |
| if (IS_REACHABLE(CONFIG_NVRAM) && 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; |
| 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; |
| #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; |
| } |
| #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; |
| #ifdef CONFIG_MAC |
| p->frame_buffer = ioremap_nocache(frame_buffer_phys, p->total_vram); |
| #else |
| p->frame_buffer = ioremap_wt(frame_buffer_phys, p->total_vram); |
| #endif |
| 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; |
| |
| fb_info(&p->info, "valkyrie frame buffer device\n"); |
| 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 = |
| container_of(fb_info, struct fb_info_valkyrie, 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"); |