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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/module.h>#include <linux/kernel.h>#include <linux/errno.h>#include <linux/string.h>#include <linux/mm.h>#include <linux/delay.h>#include <linux/nubus.h>#include <linux/init.h>#include <linux/fb.h>
#include <asm/setup.h>#include <asm/macintosh.h>#include <asm/io.h>
/* Common DAC base address for the LC, RBV, Valkyrie, and IIvx */#define DAC_BASE 0x50f24000
/* Some addresses for the DAFB */#define DAFB_BASE 0xf9800200
/* Address for the built-in Civic framebuffer in Quadra AVs */#define CIVIC_BASE 0x50f30800
/* GSC (Gray Scale Controller) base address */#define GSC_BASE 0x50F20000
/* CSC (Color Screen Controller) base address */#define CSC_BASE 0x50F20000
static int (*macfb_setpalette)(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, struct fb_info *info);
static struct { unsigned char addr; unsigned char lut;} __iomem *v8_brazil_cmap_regs;
static struct { unsigned char addr; char pad1[3]; /* word aligned */ unsigned char lut; char pad2[3]; /* word aligned */ unsigned char cntl; /* a guess as to purpose */} __iomem *rbv_cmap_regs;
static struct { unsigned long reset; unsigned long pad1[3]; unsigned char pad2[3]; unsigned char lut;} __iomem *dafb_cmap_regs;
static struct { unsigned char addr; /* OFFSET: 0x00 */ unsigned char pad1[15]; unsigned char lut; /* OFFSET: 0x10 */ unsigned char pad2[15]; unsigned char status; /* OFFSET: 0x20 */ unsigned char pad3[7]; unsigned long vbl_addr; /* OFFSET: 0x28 */ unsigned int status2; /* OFFSET: 0x2C */} __iomem *civic_cmap_regs;
static struct { char pad1[0x40]; unsigned char clut_waddr; /* 0x40 */ char pad2; unsigned char clut_data; /* 0x42 */ char pad3[0x3]; unsigned char clut_raddr; /* 0x46 */} __iomem *csc_cmap_regs;
/* The registers in these structs are in NuBus slot space */struct mdc_cmap_regs { char pad1[0x200200]; unsigned char addr; char pad2[6]; unsigned char lut;};
struct toby_cmap_regs { char pad1[0x90018]; unsigned char lut; /* TFBClutWDataReg, offset 0x90018 */ char pad2[3]; unsigned char addr; /* TFBClutAddrReg, offset 0x9001C */};
struct jet_cmap_regs { char pad1[0xe0e000]; unsigned char addr; unsigned char lut;};
#define PIXEL_TO_MM(a) (((a)*10)/28) /* width in mm at 72 dpi */
static struct fb_var_screeninfo macfb_defined = { .activate = FB_ACTIVATE_NOW, .right_margin = 32, .upper_margin = 16, .lower_margin = 4, .vsync_len = 4, .vmode = FB_VMODE_NONINTERLACED,};
static struct fb_fix_screeninfo macfb_fix = { .type = FB_TYPE_PACKED_PIXELS, .accel = FB_ACCEL_NONE,};
static void *slot_addr;static struct fb_info fb_info;static u32 pseudo_palette[16];static int vidtest;
/* * Unlike the Valkyrie, the DAFB cannot set individual colormap * registers. Therefore, we do what the MacOS driver does (no * kidding!) and simply set them one by one until we hit the one we * want. */static int dafb_setpalette(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, struct fb_info *info){ static int lastreg = -2; unsigned long flags;
local_irq_save(flags);
/* * fbdev will set an entire colourmap, but X won't. Hopefully * this should accommodate both of them */ if (regno != lastreg + 1) { int i;
/* Stab in the dark trying to reset the CLUT pointer */ nubus_writel(0, &dafb_cmap_regs->reset); nop();
/* Loop until we get to the register we want */ for (i = 0; i < regno; i++) { nubus_writeb(info->cmap.red[i] >> 8, &dafb_cmap_regs->lut); nop(); nubus_writeb(info->cmap.green[i] >> 8, &dafb_cmap_regs->lut); nop(); nubus_writeb(info->cmap.blue[i] >> 8, &dafb_cmap_regs->lut); nop(); } }
nubus_writeb(red, &dafb_cmap_regs->lut); nop(); nubus_writeb(green, &dafb_cmap_regs->lut); nop(); nubus_writeb(blue, &dafb_cmap_regs->lut);
local_irq_restore(flags); lastreg = regno; return 0;}
/* V8 and Brazil seem to use the same DAC. Sonora does as well. */static int v8_brazil_setpalette(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, struct fb_info *info){ unsigned int bpp = info->var.bits_per_pixel; unsigned long flags;
local_irq_save(flags);
/* On these chips, the CLUT register numbers are spread out * across the register space. Thus: * In 8bpp, all regnos are valid. * In 4bpp, the regnos are 0x0f, 0x1f, 0x2f, etc, etc * In 2bpp, the regnos are 0x3f, 0x7f, 0xbf, 0xff */ regno = (regno << (8 - bpp)) | (0xFF >> bpp); nubus_writeb(regno, &v8_brazil_cmap_regs->addr); nop();
/* send one color channel at a time */ nubus_writeb(red, &v8_brazil_cmap_regs->lut); nop(); nubus_writeb(green, &v8_brazil_cmap_regs->lut); nop(); nubus_writeb(blue, &v8_brazil_cmap_regs->lut);
local_irq_restore(flags); return 0;}
/* RAM-Based Video */static int rbv_setpalette(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, struct fb_info *info){ unsigned long flags;
local_irq_save(flags);
/* From the VideoToolbox driver. Seems to be saying that * regno #254 and #255 are the important ones for 1-bit color, * regno #252-255 are the important ones for 2-bit color, etc. */ regno += 256 - (1 << info->var.bits_per_pixel);
/* reset clut? (VideoToolbox sez "not necessary") */ nubus_writeb(0xFF, &rbv_cmap_regs->cntl); nop();
/* tell clut which address to use. */ nubus_writeb(regno, &rbv_cmap_regs->addr); nop();
/* send one color channel at a time. */ nubus_writeb(red, &rbv_cmap_regs->lut); nop(); nubus_writeb(green, &rbv_cmap_regs->lut); nop(); nubus_writeb(blue, &rbv_cmap_regs->lut);
local_irq_restore(flags); return 0;}
/* Macintosh Display Card (8*24) */static int mdc_setpalette(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, struct fb_info *info){ struct mdc_cmap_regs *cmap_regs = slot_addr; unsigned long flags;
local_irq_save(flags);
/* the nop's are there to order writes. */ nubus_writeb(regno, &cmap_regs->addr); nop(); nubus_writeb(red, &cmap_regs->lut); nop(); nubus_writeb(green, &cmap_regs->lut); nop(); nubus_writeb(blue, &cmap_regs->lut);
local_irq_restore(flags); return 0;}
/* Toby frame buffer */static int toby_setpalette(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, struct fb_info *info){ struct toby_cmap_regs *cmap_regs = slot_addr; unsigned int bpp = info->var.bits_per_pixel; unsigned long flags;
red = ~red; green = ~green; blue = ~blue; regno = (regno << (8 - bpp)) | (0xFF >> bpp);
local_irq_save(flags);
nubus_writeb(regno, &cmap_regs->addr); nop(); nubus_writeb(red, &cmap_regs->lut); nop(); nubus_writeb(green, &cmap_regs->lut); nop(); nubus_writeb(blue, &cmap_regs->lut);
local_irq_restore(flags); return 0;}
/* Jet frame buffer */static int jet_setpalette(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, struct fb_info *info){ struct jet_cmap_regs *cmap_regs = slot_addr; unsigned long flags;
local_irq_save(flags);
nubus_writeb(regno, &cmap_regs->addr); nop(); nubus_writeb(red, &cmap_regs->lut); nop(); nubus_writeb(green, &cmap_regs->lut); nop(); nubus_writeb(blue, &cmap_regs->lut);
local_irq_restore(flags); return 0;}
/* * Civic framebuffer -- Quadra AV built-in video. A chip * called Sebastian holds the actual color palettes, and * apparently, there are two different banks of 512K RAM * which can act as separate framebuffers for doing video * input and viewing the screen at the same time! The 840AV * Can add another 1MB RAM to give the two framebuffers * 1MB RAM apiece. */static int civic_setpalette(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, struct fb_info *info){ unsigned long flags; int clut_status;
local_irq_save(flags);
/* Set the register address */ nubus_writeb(regno, &civic_cmap_regs->addr); nop();
/* * Grab a status word and do some checking; * Then finally write the clut! */ clut_status = nubus_readb(&civic_cmap_regs->status2);
if ((clut_status & 0x0008) == 0) {#if 0 if ((clut_status & 0x000D) != 0) { nubus_writeb(0x00, &civic_cmap_regs->lut); nop(); nubus_writeb(0x00, &civic_cmap_regs->lut); nop(); }#endif
nubus_writeb(red, &civic_cmap_regs->lut); nop(); nubus_writeb(green, &civic_cmap_regs->lut); nop(); nubus_writeb(blue, &civic_cmap_regs->lut); nop(); nubus_writeb(0x00, &civic_cmap_regs->lut); } else { unsigned char junk;
junk = nubus_readb(&civic_cmap_regs->lut); nop(); junk = nubus_readb(&civic_cmap_regs->lut); nop(); junk = nubus_readb(&civic_cmap_regs->lut); nop(); junk = nubus_readb(&civic_cmap_regs->lut); nop();
if ((clut_status & 0x000D) != 0) { nubus_writeb(0x00, &civic_cmap_regs->lut); nop(); nubus_writeb(0x00, &civic_cmap_regs->lut); nop(); }
nubus_writeb(red, &civic_cmap_regs->lut); nop(); nubus_writeb(green, &civic_cmap_regs->lut); nop(); nubus_writeb(blue, &civic_cmap_regs->lut); nop(); nubus_writeb(junk, &civic_cmap_regs->lut); }
local_irq_restore(flags); return 0;}
/* * The CSC is the framebuffer on the PowerBook 190 series * (and the 5300 too, but that's a PowerMac). This function * brought to you in part by the ECSC driver for MkLinux. */static int csc_setpalette(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, struct fb_info *info){ unsigned long flags;
local_irq_save(flags);
udelay(1); /* mklinux on PB 5300 waits for 260 ns */ nubus_writeb(regno, &csc_cmap_regs->clut_waddr); nubus_writeb(red, &csc_cmap_regs->clut_data); nubus_writeb(green, &csc_cmap_regs->clut_data); nubus_writeb(blue, &csc_cmap_regs->clut_data);
local_irq_restore(flags); return 0;}
static int macfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fb_info){ /* * Set a single color register. The values supplied are * already rounded down to the hardware's capabilities * (according to the entries in the `var' structure). * Return non-zero for invalid regno. */
if (regno >= fb_info->cmap.len) return 1;
if (fb_info->var.bits_per_pixel <= 8) { switch (fb_info->var.bits_per_pixel) { case 1: /* We shouldn't get here */ break; case 2: case 4: case 8: if (macfb_setpalette) macfb_setpalette(regno, red >> 8, green >> 8, blue >> 8, fb_info); else return 1; break; } } else if (regno < 16) { switch (fb_info->var.bits_per_pixel) { case 16: if (fb_info->var.red.offset == 10) { /* 1:5:5:5 */ ((u32*) (fb_info->pseudo_palette))[regno] = ((red & 0xf800) >> 1) | ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11) | ((transp != 0) << 15); } else { /* 0:5:6:5 */ ((u32*) (fb_info->pseudo_palette))[regno] = ((red & 0xf800) >> 0) | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); } break; /* * 24-bit colour almost doesn't exist on 68k Macs -- * https://support.apple.com/kb/TA28634 (Old Article: 10992) */ case 24: case 32: red >>= 8; green >>= 8; blue >>= 8; ((u32 *)(fb_info->pseudo_palette))[regno] = (red << fb_info->var.red.offset) | (green << fb_info->var.green.offset) | (blue << fb_info->var.blue.offset); break; } }
return 0;}
static const struct fb_ops macfb_ops = { .owner = THIS_MODULE, FB_DEFAULT_IOMEM_OPS, .fb_setcolreg = macfb_setcolreg,};
static void __init macfb_setup(char *options){ char *this_opt;
if (!options || !*options) return;
while ((this_opt = strsep(&options, ",")) != NULL) { if (!*this_opt) continue;
if (!strcmp(this_opt, "inverse")) fb_invert_cmaps(); else if (!strcmp(this_opt, "vidtest")) vidtest = 1; /* enable experimental CLUT code */ }}
static void __init iounmap_macfb(void){ if (dafb_cmap_regs) iounmap(dafb_cmap_regs); if (v8_brazil_cmap_regs) iounmap(v8_brazil_cmap_regs); if (rbv_cmap_regs) iounmap(rbv_cmap_regs); if (civic_cmap_regs) iounmap(civic_cmap_regs); if (csc_cmap_regs) iounmap(csc_cmap_regs);}
static int __init macfb_init(void){ int video_cmap_len, video_is_nubus = 0; struct nubus_rsrc *ndev = NULL; char *option = NULL; int err;
if (fb_get_options("macfb", &option)) return -ENODEV; macfb_setup(option);
if (!MACH_IS_MAC) return -ENODEV;
if (mac_bi_data.id == MAC_MODEL_Q630 || mac_bi_data.id == MAC_MODEL_P588) return -ENODEV; /* See valkyriefb.c */
macfb_defined.xres = mac_bi_data.dimensions & 0xFFFF; macfb_defined.yres = mac_bi_data.dimensions >> 16; macfb_defined.bits_per_pixel = mac_bi_data.videodepth;
macfb_fix.line_length = mac_bi_data.videorow; macfb_fix.smem_len = macfb_fix.line_length * macfb_defined.yres; /* Note: physical address (since 2.1.127) */ macfb_fix.smem_start = mac_bi_data.videoaddr;
/* * This is actually redundant with the initial mappings. * However, there are some non-obvious aspects to the way * those mappings are set up, so this is in fact the safest * way to ensure that this driver will work on every possible Mac */ fb_info.screen_base = ioremap(mac_bi_data.videoaddr, macfb_fix.smem_len); if (!fb_info.screen_base) return -ENODEV;
pr_info("macfb: framebuffer at 0x%08lx, mapped to 0x%p, size %dk\n", macfb_fix.smem_start, fb_info.screen_base, macfb_fix.smem_len / 1024); pr_info("macfb: mode is %dx%dx%d, linelength=%d\n", macfb_defined.xres, macfb_defined.yres, macfb_defined.bits_per_pixel, macfb_fix.line_length);
/* Fill in the available video resolution */ macfb_defined.xres_virtual = macfb_defined.xres; macfb_defined.yres_virtual = macfb_defined.yres; macfb_defined.height = PIXEL_TO_MM(macfb_defined.yres); macfb_defined.width = PIXEL_TO_MM(macfb_defined.xres);
/* Some dummy values for timing to make fbset happy */ macfb_defined.pixclock = 10000000 / macfb_defined.xres * 1000 / macfb_defined.yres; macfb_defined.left_margin = (macfb_defined.xres / 8) & 0xf8; macfb_defined.hsync_len = (macfb_defined.xres / 8) & 0xf8;
switch (macfb_defined.bits_per_pixel) { case 1: macfb_defined.red.length = macfb_defined.bits_per_pixel; macfb_defined.green.length = macfb_defined.bits_per_pixel; macfb_defined.blue.length = macfb_defined.bits_per_pixel; video_cmap_len = 2; macfb_fix.visual = FB_VISUAL_MONO01; break; case 2: case 4: case 8: macfb_defined.red.length = macfb_defined.bits_per_pixel; macfb_defined.green.length = macfb_defined.bits_per_pixel; macfb_defined.blue.length = macfb_defined.bits_per_pixel; video_cmap_len = 1 << macfb_defined.bits_per_pixel; macfb_fix.visual = FB_VISUAL_PSEUDOCOLOR; break; case 16: macfb_defined.transp.offset = 15; macfb_defined.transp.length = 1; macfb_defined.red.offset = 10; macfb_defined.red.length = 5; macfb_defined.green.offset = 5; macfb_defined.green.length = 5; macfb_defined.blue.offset = 0; macfb_defined.blue.length = 5; video_cmap_len = 16; /* * Should actually be FB_VISUAL_DIRECTCOLOR, but this * works too */ macfb_fix.visual = FB_VISUAL_TRUECOLOR; break; case 24: case 32: macfb_defined.red.offset = 16; macfb_defined.red.length = 8; macfb_defined.green.offset = 8; macfb_defined.green.length = 8; macfb_defined.blue.offset = 0; macfb_defined.blue.length = 8; video_cmap_len = 16; macfb_fix.visual = FB_VISUAL_TRUECOLOR; break; default: pr_err("macfb: unknown or unsupported bit depth: %d\n", macfb_defined.bits_per_pixel); err = -EINVAL; goto fail_unmap; }
/* * We take a wild guess that if the video physical address is * in nubus slot space, that the nubus card is driving video. * Penguin really ought to tell us whether we are using internal * video or not. * Hopefully we only find one of them. Otherwise our NuBus * code is really broken :-) */
for_each_func_rsrc(ndev) { unsigned long base = ndev->board->slot_addr;
if (mac_bi_data.videoaddr < base || mac_bi_data.videoaddr - base > 0xFFFFFF) continue;
if (ndev->category != NUBUS_CAT_DISPLAY || ndev->type != NUBUS_TYPE_VIDEO) continue;
video_is_nubus = 1; slot_addr = (unsigned char *)base;
switch(ndev->dr_hw) { case NUBUS_DRHW_APPLE_MDC: strscpy(macfb_fix.id, "Mac Disp. Card"); macfb_setpalette = mdc_setpalette; break; case NUBUS_DRHW_APPLE_TFB: strscpy(macfb_fix.id, "Toby"); macfb_setpalette = toby_setpalette; break; case NUBUS_DRHW_APPLE_JET: strscpy(macfb_fix.id, "Jet"); macfb_setpalette = jet_setpalette; break; default: strscpy(macfb_fix.id, "Generic NuBus"); break; } }
/* If it's not a NuBus card, it must be internal video */ if (!video_is_nubus) switch (mac_bi_data.id) { /* * DAFB Quadras * Note: these first four have the v7 DAFB, which is * known to be rather unlike the ones used in the * other models */ case MAC_MODEL_P475: case MAC_MODEL_P475F: case MAC_MODEL_P575: case MAC_MODEL_Q605:
case MAC_MODEL_Q800: case MAC_MODEL_Q650: case MAC_MODEL_Q610: case MAC_MODEL_C650: case MAC_MODEL_C610: case MAC_MODEL_Q700: case MAC_MODEL_Q900: case MAC_MODEL_Q950: strscpy(macfb_fix.id, "DAFB"); macfb_setpalette = dafb_setpalette; dafb_cmap_regs = ioremap(DAFB_BASE, 0x1000); break;
/* * LC II uses the V8 framebuffer */ case MAC_MODEL_LCII: strscpy(macfb_fix.id, "V8"); macfb_setpalette = v8_brazil_setpalette; v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000); break;
/* * IIvi, IIvx use the "Brazil" framebuffer (which is * very much like the V8, it seems, and probably uses * the same DAC) */ case MAC_MODEL_IIVI: case MAC_MODEL_IIVX: case MAC_MODEL_P600: strscpy(macfb_fix.id, "Brazil"); macfb_setpalette = v8_brazil_setpalette; v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000); break;
/* * LC III (and friends) use the Sonora framebuffer * Incidentally this is also used in the non-AV models * of the x100 PowerMacs * These do in fact seem to use the same DAC interface * as the LC II. */ case MAC_MODEL_LCIII: case MAC_MODEL_P520: case MAC_MODEL_P550: case MAC_MODEL_P460: strscpy(macfb_fix.id, "Sonora"); macfb_setpalette = v8_brazil_setpalette; v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000); break;
/* * IIci and IIsi use the infamous RBV chip * (the IIsi is just a rebadged and crippled * IIci in a different case, BTW) */ case MAC_MODEL_IICI: case MAC_MODEL_IISI: strscpy(macfb_fix.id, "RBV"); macfb_setpalette = rbv_setpalette; rbv_cmap_regs = ioremap(DAC_BASE, 0x1000); break;
/* * AVs use the Civic framebuffer */ case MAC_MODEL_Q840: case MAC_MODEL_C660: strscpy(macfb_fix.id, "Civic"); macfb_setpalette = civic_setpalette; civic_cmap_regs = ioremap(CIVIC_BASE, 0x1000); break;
/* * Assorted weirdos * We think this may be like the LC II */ case MAC_MODEL_LC: strscpy(macfb_fix.id, "LC"); if (vidtest) { macfb_setpalette = v8_brazil_setpalette; v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000); } break;
/* * We think this may be like the LC II */ case MAC_MODEL_CCL: strscpy(macfb_fix.id, "Color Classic"); if (vidtest) { macfb_setpalette = v8_brazil_setpalette; v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000); } break;
/* * And we *do* mean "weirdos" */ case MAC_MODEL_TV: strscpy(macfb_fix.id, "Mac TV"); break;
/* * These don't have colour, so no need to worry */ case MAC_MODEL_SE30: case MAC_MODEL_CLII: strscpy(macfb_fix.id, "Monochrome"); break;
/* * Powerbooks are particularly difficult. Many of * them have separate framebuffers for external and * internal video, which is admittedly pretty cool, * but will be a bit of a headache to support here. * Also, many of them are grayscale, and we don't * really support that. */
/* * Slot 0 ROM says TIM. No external video. B&W. */ case MAC_MODEL_PB140: case MAC_MODEL_PB145: case MAC_MODEL_PB170: strscpy(macfb_fix.id, "DDC"); break;
/* * Internal is GSC, External (if present) is ViSC */ case MAC_MODEL_PB150: /* no external video */ case MAC_MODEL_PB160: case MAC_MODEL_PB165: case MAC_MODEL_PB180: case MAC_MODEL_PB210: case MAC_MODEL_PB230: strscpy(macfb_fix.id, "GSC"); break;
/* * Internal is TIM, External is ViSC */ case MAC_MODEL_PB165C: case MAC_MODEL_PB180C: strscpy(macfb_fix.id, "TIM"); break;
/* * Internal is CSC, External is Keystone+Ariel. */ case MAC_MODEL_PB190: /* external video is optional */ case MAC_MODEL_PB520: case MAC_MODEL_PB250: case MAC_MODEL_PB270C: case MAC_MODEL_PB280: case MAC_MODEL_PB280C: strscpy(macfb_fix.id, "CSC"); macfb_setpalette = csc_setpalette; csc_cmap_regs = ioremap(CSC_BASE, 0x1000); break;
default: strscpy(macfb_fix.id, "Unknown"); break; }
fb_info.fbops = &macfb_ops; fb_info.var = macfb_defined; fb_info.fix = macfb_fix; fb_info.pseudo_palette = pseudo_palette;
err = fb_alloc_cmap(&fb_info.cmap, video_cmap_len, 0); if (err) goto fail_unmap;
err = register_framebuffer(&fb_info); if (err) goto fail_dealloc;
fb_info(&fb_info, "%s frame buffer device\n", fb_info.fix.id);
return 0;
fail_dealloc: fb_dealloc_cmap(&fb_info.cmap);fail_unmap: iounmap(fb_info.screen_base); iounmap_macfb(); return err;}
module_init(macfb_init);MODULE_LICENSE("GPL");