diff options
Diffstat (limited to 'drivers/video/platinumfb.c')
| -rw-r--r-- | drivers/video/platinumfb.c | 693 |
1 files changed, 693 insertions, 0 deletions
diff --git a/drivers/video/platinumfb.c b/drivers/video/platinumfb.c new file mode 100644 index 00000000000..3dd1de1539d --- /dev/null +++ b/drivers/video/platinumfb.c @@ -0,0 +1,693 @@ +/* + * platinumfb.c -- frame buffer device for the PowerMac 'platinum' display + * + * Copyright (C) 1998 Franz Sirl + * + * Frame buffer structure from: + * drivers/video/controlfb.c -- frame buffer device for + * Apple 'control' display chip. + * Copyright (C) 1998 Dan Jacobowitz + * + * Hardware information from: + * platinum.c: Console support for PowerMac "platinum" display adaptor. + * Copyright (C) 1996 Paul Mackerras and Mark Abene + * + * 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/config.h> +#include <linux/module.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/vmalloc.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/nvram.h> +#include <asm/io.h> +#include <asm/prom.h> +#include <asm/pgtable.h> +#include <asm/of_device.h> + +#include "macmodes.h" +#include "platinumfb.h" + +static int default_vmode = VMODE_NVRAM; +static int default_cmode = CMODE_NVRAM; + +struct fb_info_platinum { + struct fb_info *info; + + int vmode, cmode; + int xres, yres; + int vxres, vyres; + int xoffset, yoffset; + + struct { + __u8 red, green, blue; + } palette[256]; + u32 pseudo_palette[17]; + + volatile struct cmap_regs __iomem *cmap_regs; + unsigned long cmap_regs_phys; + + volatile struct platinum_regs __iomem *platinum_regs; + unsigned long platinum_regs_phys; + + __u8 __iomem *frame_buffer; + volatile __u8 __iomem *base_frame_buffer; + unsigned long frame_buffer_phys; + + unsigned long total_vram; + int clktype; + int dactype; +}; + +/* + * Frame buffer device API + */ + +static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int transp, struct fb_info *info); +static int platinumfb_blank(int blank_mode, struct fb_info *info); +static int platinumfb_set_par (struct fb_info *info); +static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info); + +/* + * internal functions + */ + +static inline int platinum_vram_reqd(int video_mode, int color_mode); +static int read_platinum_sense(struct fb_info_platinum *pinfo); +static void set_platinum_clock(struct fb_info_platinum *pinfo); +static void platinum_set_hardware(struct fb_info_platinum *pinfo); +static int platinum_var_to_par(struct fb_var_screeninfo *var, + struct fb_info_platinum *pinfo, + int check_only); + +/* + * Interface used by the world + */ + +int platinumfb_init(void); +int platinumfb_setup(char*); + +static struct fb_ops platinumfb_ops = { + .owner = THIS_MODULE, + .fb_check_var = platinumfb_check_var, + .fb_set_par = platinumfb_set_par, + .fb_setcolreg = platinumfb_setcolreg, + .fb_blank = platinumfb_blank, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_cursor = soft_cursor, +}; + +/* + * Checks a var structure + */ +static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info) +{ + return platinum_var_to_par(var, info->par, 1); +} + +/* + * Applies current var to display + */ +static int platinumfb_set_par (struct fb_info *info) +{ + struct fb_info_platinum *pinfo = info->par; + struct platinum_regvals *init; + int err, offset = 0x20; + + if((err = platinum_var_to_par(&info->var, pinfo, 0))) { + printk (KERN_ERR "platinumfb_set_par: error calling" + " platinum_var_to_par: %d.\n", err); + return err; + } + + platinum_set_hardware(pinfo); + + init = platinum_reg_init[pinfo->vmode-1]; + + if (pinfo->vmode == 13 && pinfo->cmode > 0) + offset = 0x10; + info->screen_base = pinfo->frame_buffer + init->fb_offset + offset; + info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset; + info->fix.visual = (pinfo->cmode == CMODE_8) ? + FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR; + info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode) + offset; + printk("line_length: %x\n", info->fix.line_length); + return 0; +} + +static int platinumfb_blank(int blank, struct fb_info *fb) +{ +/* + * Blank the screen if blank_mode != 0, else unblank. If blank == 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 + */ +/* [danj] I think there's something fishy about those constants... */ +/* + struct fb_info_platinum *info = (struct fb_info_platinum *) fb; + int ctrl; + + ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33; + if (blank) + --blank_mode; + if (blank & VESA_VSYNC_SUSPEND) + ctrl &= ~3; + if (blank & VESA_HSYNC_SUSPEND) + ctrl &= ~0x30; + out_le32(&info->platinum_regs->ctrl.r, ctrl); +*/ +/* TODO: Figure out how the heck to powerdown this thing! */ + return 0; +} + +static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int transp, struct fb_info *info) +{ + struct fb_info_platinum *pinfo = info->par; + volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; + + if (regno > 255) + return 1; + + red >>= 8; + green >>= 8; + blue >>= 8; + + pinfo->palette[regno].red = red; + pinfo->palette[regno].green = green; + pinfo->palette[regno].blue = blue; + + out_8(&cmap_regs->addr, regno); /* tell clut what addr to fill */ + out_8(&cmap_regs->lut, red); /* send one color channel at */ + out_8(&cmap_regs->lut, green); /* a time... */ + out_8(&cmap_regs->lut, blue); + + if (regno < 16) { + int i; + u32 *pal = info->pseudo_palette; + switch (pinfo->cmode) { + case CMODE_16: + pal[regno] = (regno << 10) | (regno << 5) | regno; + break; + case CMODE_32: + i = (regno << 8) | regno; + pal[regno] = (i << 16) | i; + break; + } + } + + return 0; +} + +static inline int platinum_vram_reqd(int video_mode, int color_mode) +{ + return vmode_attrs[video_mode-1].vres * + (vmode_attrs[video_mode-1].hres * (1<<color_mode) + 0x20) +0x1000; +} + +#define STORE_D2(a, d) { \ + out_8(&cmap_regs->addr, (a+32)); \ + out_8(&cmap_regs->d2, (d)); \ +} + +static void set_platinum_clock(struct fb_info_platinum *pinfo) +{ + volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; + struct platinum_regvals *init; + + init = platinum_reg_init[pinfo->vmode-1]; + + STORE_D2(6, 0xc6); + out_8(&cmap_regs->addr,3+32); + + if (in_8(&cmap_regs->d2) == 2) { + STORE_D2(7, init->clock_params[pinfo->clktype][0]); + STORE_D2(8, init->clock_params[pinfo->clktype][1]); + STORE_D2(3, 3); + } else { + STORE_D2(4, init->clock_params[pinfo->clktype][0]); + STORE_D2(5, init->clock_params[pinfo->clktype][1]); + STORE_D2(3, 2); + } + + __delay(5000); + STORE_D2(9, 0xa6); +} + + +/* Now how about actually saying, Make it so! */ +/* Some things in here probably don't need to be done each time. */ +static void platinum_set_hardware(struct fb_info_platinum *pinfo) +{ + volatile struct platinum_regs __iomem *platinum_regs = pinfo->platinum_regs; + volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; + struct platinum_regvals *init; + int i; + int vmode, cmode; + + vmode = pinfo->vmode; + cmode = pinfo->cmode; + + init = platinum_reg_init[vmode - 1]; + + /* Initialize display timing registers */ + out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */ + + for (i = 0; i < 26; ++i) + out_be32(&platinum_regs->reg[i+32].r, init->regs[i]); + + out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ? + init->offset[cmode] + 4 - cmode : + init->offset[cmode])); + out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10); + out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]); + out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ? + init->mode[cmode+1] : + init->mode[cmode])); + out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011)); + out_be32(&platinum_regs->reg[21].r, 0x100); + out_be32(&platinum_regs->reg[22].r, 1); + out_be32(&platinum_regs->reg[23].r, 1); + out_be32(&platinum_regs->reg[26].r, 0xc00); + out_be32(&platinum_regs->reg[27].r, 0x235); + /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */ + + STORE_D2(0, (pinfo->total_vram == 0x100000 ? + init->dacula_ctrl[cmode] & 0xf : + init->dacula_ctrl[cmode])); + STORE_D2(1, 4); + STORE_D2(2, 0); + + set_platinum_clock(pinfo); + + out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */ +} + +/* + * Set misc info vars for this driver + */ +static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo) +{ + /* Fill fb_info */ + info->fbops = &platinumfb_ops; + info->pseudo_palette = pinfo->pseudo_palette; + info->flags = FBINFO_DEFAULT; + info->screen_base = pinfo->frame_buffer + 0x20; + + fb_alloc_cmap(&info->cmap, 256, 0); + + /* Fill fix common fields */ + strcpy(info->fix.id, "platinum"); + info->fix.mmio_start = pinfo->platinum_regs_phys; + info->fix.mmio_len = 0x1000; + info->fix.type = FB_TYPE_PACKED_PIXELS; + info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */ + info->fix.smem_len = pinfo->total_vram - 0x20; + info->fix.ywrapstep = 0; + info->fix.xpanstep = 0; + info->fix.ypanstep = 0; + info->fix.type_aux = 0; + info->fix.accel = FB_ACCEL_NONE; +} + + +static int __devinit platinum_init_fb(struct fb_info *info) +{ + struct fb_info_platinum *pinfo = info->par; + struct fb_var_screeninfo var; + int sense, rc; + + sense = read_platinum_sense(pinfo); + printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense); + + if (default_vmode == VMODE_NVRAM) { + default_vmode = nvram_read_byte(NV_VMODE); + if (default_vmode <= 0 || default_vmode > VMODE_MAX || + !platinum_reg_init[default_vmode-1]) + default_vmode = VMODE_CHOOSE; + } + if (default_vmode == VMODE_CHOOSE) { + default_vmode = mac_map_monitor_sense(sense); + } + if (default_vmode <= 0 || default_vmode > VMODE_MAX) + default_vmode = VMODE_640_480_60; + if (default_cmode == CMODE_NVRAM) + default_cmode = nvram_read_byte(NV_CMODE); + if (default_cmode < CMODE_8 || default_cmode > CMODE_32) + default_cmode = CMODE_8; + /* + * Reduce the pixel size if we don't have enough VRAM. + */ + while(default_cmode > CMODE_8 && + platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram) + default_cmode--; + + printk("platinumfb: Using video mode %d and color mode %d.\n", default_vmode, default_cmode); + + /* Setup default var */ + if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) { + /* This shouldn't happen! */ + printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode); +try_again: + default_vmode = VMODE_640_480_60; + default_cmode = CMODE_8; + if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) { + printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n"); + return -ENXIO; + } + } + + /* Initialize info structure */ + platinum_init_info(info, pinfo); + + /* Apply default var */ + info->var = var; + var.activate = FB_ACTIVATE_NOW; + rc = fb_set_var(info, &var); + if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8)) + goto try_again; + + /* Register with fbdev layer */ + rc = register_framebuffer(info); + if (rc < 0) + return rc; + + printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node); + + return 0; +} + +/* + * Get the monitor sense value. + * Note that this can be called before calibrate_delay, + * so we can't use udelay. + */ +static int read_platinum_sense(struct fb_info_platinum *info) +{ + volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs; + int sense; + + out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */ + __delay(2000); + sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8; + + /* drive each sense line low in turn and collect the other 2 */ + out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */ + __delay(2000); + sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4; + out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */ + __delay(2000); + sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1; + sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2; + out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */ + __delay(2000); + sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1; + + out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */ + + return sense; +} + +/* + * This routine takes a user-supplied var, and picks the best vmode/cmode from it. + * It also updates the var structure to the actual mode data obtained + */ +static int platinum_var_to_par(struct fb_var_screeninfo *var, + struct fb_info_platinum *pinfo, + int check_only) +{ + int vmode, cmode; + + if (mac_var_to_vmode(var, &vmode, &cmode) != 0) { + printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n"); + printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres); + printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres); + printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual); + printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual); + printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel); + printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock); + printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode); + return -EINVAL; + } + + if (!platinum_reg_init[vmode-1]) { + printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode); + return -EINVAL; + } + + if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) { + printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode); + return -EINVAL; + } + + if (mac_vmode_to_var(vmode, cmode, var)) + return -EINVAL; + + if (check_only) + return 0; + + pinfo->vmode = vmode; + pinfo->cmode = cmode; + pinfo->xres = vmode_attrs[vmode-1].hres; + pinfo->yres = vmode_attrs[vmode-1].vres; + pinfo->xoffset = 0; + pinfo->yoffset = 0; + pinfo->vxres = pinfo->xres; + pinfo->vyres = pinfo->yres; + + return 0; +} + + +/* + * Parse user speficied options (`video=platinumfb:') + */ +int __init platinumfb_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 0: + case 8: + default_cmode = CMODE_8; + break; + case 15: + case 16: + default_cmode = CMODE_16; + break; + case 24: + case 32: + default_cmode = CMODE_32; + break; + } + } + } + return 0; +} + +#ifdef __powerpc__ +#define invalidate_cache(addr) \ + asm volatile("eieio; dcbf 0,%1" \ + : "=m" (*(addr)) : "r" (addr) : "memory"); +#else +#define invalidate_cache(addr) +#endif + +static int __devinit platinumfb_probe(struct of_device* odev, const struct of_match *match) +{ + struct device_node *dp = odev->node; + struct fb_info *info; + struct fb_info_platinum *pinfo; + unsigned long addr, size; + volatile __u8 *fbuffer; + int i, bank0, bank1, bank2, bank3, rc; + + if (dp->n_addrs != 2) { + printk(KERN_ERR "expecting 2 address for platinum (got %d)", dp->n_addrs); + return -ENXIO; + } + printk(KERN_INFO "platinumfb: Found Apple Platinum video hardware\n"); + + info = framebuffer_alloc(sizeof(*pinfo), &odev->dev); + if (info == NULL) + return -ENOMEM; + pinfo = info->par; + + /* Map in frame buffer and registers */ + for (i = 0; i < dp->n_addrs; ++i) { + addr = dp->addrs[i].address; + size = dp->addrs[i].size; + /* Let's assume we can request either all or nothing */ + if (!request_mem_region(addr, size, "platinumfb")) { + framebuffer_release(info); + return -ENXIO; + } + if (size >= 0x400000) { + /* frame buffer - map only 4MB */ + pinfo->frame_buffer_phys = addr; + pinfo->frame_buffer = __ioremap(addr, 0x400000, _PAGE_WRITETHRU); + pinfo->base_frame_buffer = pinfo->frame_buffer; + } else { + /* registers */ + pinfo->platinum_regs_phys = addr; + pinfo->platinum_regs = ioremap(addr, size); + } + } + + pinfo->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */ + request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap"); + pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000); + + /* Grok total video ram */ + out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys); + out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011); /* select max vram */ + out_be32(&pinfo->platinum_regs->reg[24].r, 0); /* switch in vram */ + + fbuffer = pinfo->base_frame_buffer; + fbuffer[0x100000] = 0x34; + fbuffer[0x100008] = 0x0; + invalidate_cache(&fbuffer[0x100000]); + fbuffer[0x200000] = 0x56; + fbuffer[0x200008] = 0x0; + invalidate_cache(&fbuffer[0x200000]); + fbuffer[0x300000] = 0x78; + fbuffer[0x300008] = 0x0; + invalidate_cache(&fbuffer[0x300000]); + bank0 = 1; /* builtin 1MB vram, always there */ + bank1 = fbuffer[0x100000] == 0x34; + bank2 = fbuffer[0x200000] == 0x56; + bank3 = fbuffer[0x300000] == 0x78; + pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000; + printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n", (int) (pinfo->total_vram / 1024 / 1024), + bank3, bank2, bank1, bank0); + + /* + * Try to determine whether we have an old or a new DACula. + */ + out_8(&pinfo->cmap_regs->addr, 0x40); + pinfo->dactype = in_8(&pinfo->cmap_regs->d2); + switch (pinfo->dactype) { + case 0x3c: + pinfo->clktype = 1; + printk(KERN_INFO "platinumfb: DACula type 0x3c\n"); + break; + case 0x84: + pinfo->clktype = 0; + printk(KERN_INFO "platinumfb: DACula type 0x84\n"); + break; + default: + pinfo->clktype = 0; + printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype); + break; + } + dev_set_drvdata(&odev->dev, info); + + rc = platinum_init_fb(info); + if (rc != 0) { + dev_set_drvdata(&odev->dev, NULL); + framebuffer_release(info); + } + + return rc; +} + +static int __devexit platinumfb_remove(struct of_device* odev) +{ + struct fb_info *info = dev_get_drvdata(&odev->dev); + struct fb_info_platinum *pinfo = info->par; + struct device_node *dp = odev->node; + unsigned long addr, size; + int i; + + unregister_framebuffer (info); + + /* Unmap frame buffer and registers */ + for (i = 0; i < dp->n_addrs; ++i) { + addr = dp->addrs[i].address; + size = dp->addrs[i].size; + release_mem_region(addr, size); + } + iounmap(pinfo->frame_buffer); + iounmap(pinfo->platinum_regs); + release_mem_region(pinfo->cmap_regs_phys, 0x1000); + iounmap(pinfo->cmap_regs); + + framebuffer_release(info); + + return 0; +} + +static struct of_match platinumfb_match[] = +{ + { + .name = "platinum", + .type = OF_ANY_MATCH, + .compatible = OF_ANY_MATCH, + }, + {}, +}; + +static struct of_platform_driver platinum_driver = +{ + .name = "platinumfb", + .match_table = platinumfb_match, + .probe = platinumfb_probe, + .remove = platinumfb_remove, +}; + +int __init platinumfb_init(void) +{ +#ifndef MODULE + char *option = NULL; + + if (fb_get_options("platinumfb", &option)) + return -ENODEV; + platinumfb_setup(option); +#endif + of_register_driver(&platinum_driver); + + return 0; +} + +void __exit platinumfb_exit(void) +{ + of_unregister_driver(&platinum_driver); +} + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video"); +module_init(platinumfb_init); + +#ifdef MODULE +module_exit(platinumfb_exit); +#endif |