/* sunxvr500.c: Sun 3DLABS XVR-500 Expert3D fb driver for sparc64 systems * * License: GPL * * Copyright (C) 2007 David S. Miller (davem@davemloft.net) */ #include <linux/aperture.h> #include <linux/kernel.h> #include <linux/fb.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/of.h> #include <asm/io.h> /* XXX This device has a 'dev-comm' property which apparently is * XXX a pointer into the openfirmware's address space which is * XXX a shared area the kernel driver can use to keep OBP * XXX informed about the current resolution setting. The idea * XXX is that the kernel can change resolutions, and as long * XXX as the values in the 'dev-comm' area are accurate then * XXX OBP can still render text properly to the console. * XXX * XXX I'm still working out the layout of this and whether there * XXX are any signatures we need to look for etc. */ struct e3d_info { struct fb_info *info; struct pci_dev *pdev; spinlock_t lock; char __iomem *fb_base; unsigned long fb_base_phys; unsigned long fb8_buf_diff; unsigned long regs_base_phys; void __iomem *ramdac; struct device_node *of_node; unsigned int width; unsigned int height; unsigned int depth; unsigned int fb_size; u32 fb_base_reg; u32 fb8_0_off; u32 fb8_1_off; u32 pseudo_palette[16]; }; static int e3d_get_props(struct e3d_info *ep) { ep->width = of_getintprop_default(ep->of_node, "width", 0); ep->height = of_getintprop_default(ep->of_node, "height", 0); ep->depth = of_getintprop_default(ep->of_node, "depth", 8); if (!ep->width || !ep->height) { printk(KERN_ERR "e3d: Critical properties missing for %s\n", pci_name(ep->pdev)); return -EINVAL; } return 0; } /* My XVR-500 comes up, at 1280x768 and a FB base register value of * 0x04000000, the following video layout register values: * * RAMDAC_VID_WH 0x03ff04ff * RAMDAC_VID_CFG 0x1a0b0088 * RAMDAC_VID_32FB_0 0x04000000 * RAMDAC_VID_32FB_1 0x04800000 * RAMDAC_VID_8FB_0 0x05000000 * RAMDAC_VID_8FB_1 0x05200000 * RAMDAC_VID_XXXFB 0x05400000 * RAMDAC_VID_YYYFB 0x05c00000 * RAMDAC_VID_ZZZFB 0x05e00000 */ /* Video layout registers */ #define RAMDAC_VID_WH 0x00000070UL /* (height-1)<<16 | (width-1) */ #define RAMDAC_VID_CFG 0x00000074UL /* 0x1a000088|(linesz_log2<<16) */ #define RAMDAC_VID_32FB_0 0x00000078UL /* PCI base 32bpp FB buffer 0 */ #define RAMDAC_VID_32FB_1 0x0000007cUL /* PCI base 32bpp FB buffer 1 */ #define RAMDAC_VID_8FB_0 0x00000080UL /* PCI base 8bpp FB buffer 0 */ #define RAMDAC_VID_8FB_1 0x00000084UL /* PCI base 8bpp FB buffer 1 */ #define RAMDAC_VID_XXXFB 0x00000088UL /* PCI base of XXX FB */ #define RAMDAC_VID_YYYFB 0x0000008cUL /* PCI base of YYY FB */ #define RAMDAC_VID_ZZZFB 0x00000090UL /* PCI base of ZZZ FB */ /* CLUT registers */ #define RAMDAC_INDEX 0x000000bcUL #define RAMDAC_DATA 0x000000c0UL static void e3d_clut_write(struct e3d_info *ep, int index, u32 val) { void __iomem *ramdac = ep->ramdac; unsigned long flags; spin_lock_irqsave(&ep->lock, flags); writel(index, ramdac + RAMDAC_INDEX); writel(val, ramdac + RAMDAC_DATA); spin_unlock_irqrestore(&ep->lock, flags); } static int e3d_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { struct e3d_info *ep = info->par; u32 red_8, green_8, blue_8; u32 red_10, green_10, blue_10; u32 value; if (regno >= 256) return 1; red_8 = red >> 8; green_8 = green >> 8; blue_8 = blue >> 8; value = (blue_8 << 24) | (green_8 << 16) | (red_8 << 8); if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16) ((u32 *)info->pseudo_palette)[regno] = value; red_10 = red >> 6; green_10 = green >> 6; blue_10 = blue >> 6; value = (blue_10 << 20) | (green_10 << 10) | (red_10 << 0); e3d_clut_write(ep, regno, value); return 0; } /* XXX This is a bit of a hack. I can't figure out exactly how the * XXX two 8bpp areas of the framebuffer work. I imagine there is * XXX a WID attribute somewhere else in the framebuffer which tells * XXX the ramdac which of the two 8bpp framebuffer regions to take * XXX the pixel from. So, for now, render into both regions to make * XXX sure the pixel shows up. */ static void e3d_imageblit(struct fb_info *info, const struct fb_image *image) { struct e3d_info *ep = info->par; unsigned long flags; spin_lock_irqsave(&ep->lock, flags); cfb_imageblit(info, image); info->screen_base += ep->fb8_buf_diff; cfb_imageblit(info, image); info->screen_base -= ep->fb8_buf_diff; spin_unlock_irqrestore(&ep->lock, flags); } static void e3d_fillrect(struct fb_info *info, const struct fb_fillrect *rect) { struct e3d_info *ep = info->par; unsigned long flags; spin_lock_irqsave(&ep->lock, flags); cfb_fillrect(info, rect); info->screen_base += ep->fb8_buf_diff; cfb_fillrect(info, rect); info->screen_base -= ep->fb8_buf_diff; spin_unlock_irqrestore(&ep->lock, flags); } static void e3d_copyarea(struct fb_info *info, const struct fb_copyarea *area) { struct e3d_info *ep = info->par; unsigned long flags; spin_lock_irqsave(&ep->lock, flags); cfb_copyarea(info, area); info->screen_base += ep->fb8_buf_diff; cfb_copyarea(info, area); info->screen_base -= ep->fb8_buf_diff; spin_unlock_irqrestore(&ep->lock, flags); } static const struct fb_ops e3d_ops = { .owner = THIS_MODULE, .fb_setcolreg = e3d_setcolreg, .fb_fillrect = e3d_fillrect, .fb_copyarea = e3d_copyarea, .fb_imageblit = e3d_imageblit, }; static int e3d_set_fbinfo(struct e3d_info *ep) { struct fb_info *info = ep->info; struct fb_var_screeninfo *var = &info->var; info->fbops = &e3d_ops; info->screen_base = ep->fb_base; info->screen_size = ep->fb_size; info->pseudo_palette = ep->pseudo_palette; /* Fill fix common fields */ strscpy(info->fix.id, "e3d", sizeof(info->fix.id)); info->fix.smem_start = ep->fb_base_phys; info->fix.smem_len = ep->fb_size; info->fix.type = FB_TYPE_PACKED_PIXELS; if (ep->depth == 32 || ep->depth == 24) info->fix.visual = FB_VISUAL_TRUECOLOR; else info->fix.visual = FB_VISUAL_PSEUDOCOLOR; var->xres = ep->width; var->yres = ep->height; var->xres_virtual = var->xres; var->yres_virtual = var->yres; var->bits_per_pixel = ep->depth; var->red.offset = 8; var->red.length = 8; var->green.offset = 16; var->green.length = 8; var->blue.offset = 24; var->blue.length = 8; var->transp.offset = 0; var->transp.length = 0; if (fb_alloc_cmap(&info->cmap, 256, 0)) { printk(KERN_ERR "e3d: Cannot allocate color map.\n"); return -ENOMEM; } return 0; } static int e3d_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent) { struct device_node *of_node; const char *device_type; struct fb_info *info; struct e3d_info *ep; unsigned int line_length; int err; err = aperture_remove_conflicting_pci_devices(pdev, "e3dfb"); if (err) return err; of_node = pci_device_to_OF_node(pdev); if (!of_node) { printk(KERN_ERR "e3d: Cannot find OF node of %s\n", pci_name(pdev)); return -ENODEV; } device_type = of_get_property(of_node, "device_type", NULL); if (!device_type) { printk(KERN_INFO "e3d: Ignoring secondary output device " "at %s\n", pci_name(pdev)); return -ENODEV; } err = pci_enable_device(pdev); if (err < 0) { printk(KERN_ERR "e3d: Cannot enable PCI device %s\n", pci_name(pdev)); goto err_out; } info = framebuffer_alloc(sizeof(struct e3d_info), &pdev->dev); if (!info) { err = -ENOMEM; goto err_disable; } ep = info->par; ep->info = info; ep->pdev = pdev; spin_lock_init(&ep->lock); ep->of_node = of_node; /* Read the PCI base register of the frame buffer, which we * need in order to interpret the RAMDAC_VID_*FB* values in * the ramdac correctly. */ pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &ep->fb_base_reg); ep->fb_base_reg &= PCI_BASE_ADDRESS_MEM_MASK; ep->regs_base_phys = pci_resource_start (pdev, 1); err = pci_request_region(pdev, 1, "e3d regs"); if (err < 0) { printk("e3d: Cannot request region 1 for %s\n", pci_name(pdev)); goto err_release_fb; } ep->ramdac = ioremap(ep->regs_base_phys + 0x8000, 0x1000); if (!ep->ramdac) { err = -ENOMEM; goto err_release_pci1; } ep->fb8_0_off = readl(ep->ramdac + RAMDAC_VID_8FB_0); ep->fb8_0_off -= ep->fb_base_reg; ep->fb8_1_off = readl(ep->ramdac + RAMDAC_VID_8FB_1); ep->fb8_1_off -= ep->fb_base_reg; ep->fb8_buf_diff = ep->fb8_1_off - ep->fb8_0_off; ep->fb_base_phys = pci_resource_start (pdev, 0); ep->fb_base_phys += ep->fb8_0_off; err = pci_request_region(pdev, 0, "e3d framebuffer"); if (err < 0) { printk("e3d: Cannot request region 0 for %s\n", pci_name(pdev)); goto err_unmap_ramdac; } err = e3d_get_props(ep); if (err) goto err_release_pci0; line_length = (readl(ep->ramdac + RAMDAC_VID_CFG) >> 16) & 0xff; line_length = 1 << line_length; switch (ep->depth) { case 8: info->fix.line_length = line_length; break; case 16: info->fix.line_length = line_length * 2; break; case 24: info->fix.line_length = line_length * 3; break; case 32: info->fix.line_length = line_length * 4; break; } ep->fb_size = info->fix.line_length * ep->height; ep->fb_base = ioremap(ep->fb_base_phys, ep->fb_size); if (!ep->fb_base) { err = -ENOMEM; goto err_release_pci0; } err = e3d_set_fbinfo(ep); if (err) goto err_unmap_fb; pci_set_drvdata(pdev, info); printk("e3d: Found device at %s\n", pci_name(pdev)); err = register_framebuffer(info); if (err < 0) { printk(KERN_ERR "e3d: Could not register framebuffer %s\n", pci_name(pdev)); goto err_free_cmap; } return 0; err_free_cmap: fb_dealloc_cmap(&info->cmap); err_unmap_fb: iounmap(ep->fb_base); err_release_pci0: pci_release_region(pdev, 0); err_unmap_ramdac: iounmap(ep->ramdac); err_release_pci1: pci_release_region(pdev, 1); err_release_fb: framebuffer_release(info); err_disable: pci_disable_device(pdev); err_out: return err; } static const struct pci_device_id e3d_pci_table[] = { { PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a0), }, { PCI_DEVICE(0x1091, 0x7a0), }, { PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a2), }, { .vendor = PCI_VENDOR_ID_3DLABS, .device = PCI_ANY_ID, .subvendor = PCI_VENDOR_ID_3DLABS, .subdevice = 0x0108, }, { .vendor = PCI_VENDOR_ID_3DLABS, .device = PCI_ANY_ID, .subvendor = PCI_VENDOR_ID_3DLABS, .subdevice = 0x0140, }, { .vendor = PCI_VENDOR_ID_3DLABS, .device = PCI_ANY_ID, .subvendor = PCI_VENDOR_ID_3DLABS, .subdevice = 0x1024, }, { 0, } }; static struct pci_driver e3d_driver = { .driver = { .suppress_bind_attrs = true, }, .name = "e3d", .id_table = e3d_pci_table, .probe = e3d_pci_register, }; static int __init e3d_init(void) { if (fb_modesetting_disabled("e3d")) return -ENODEV; if (fb_get_options("e3d", NULL)) return -ENODEV; return pci_register_driver(&e3d_driver); } device_initcall(e3d_init);