/* * Geode GX framebuffer driver. * * Copyright (C) 2006 Arcom Control Systems Ltd. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * * This driver assumes that the BIOS has created a virtual PCI device header * for the video device. The PCI header is assumed to contain the following * BARs: * * BAR0 - framebuffer memory * BAR1 - graphics processor registers * BAR2 - display controller registers * BAR3 - video processor and flat panel control registers. * * 16 MiB of framebuffer memory is assumed to be available. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "gxfb.h" static char *mode_option; static int vram; /* Modes relevant to the GX (taken from modedb.c) */ static const struct fb_videomode gx_modedb[] __initdata = { /* 640x480-60 VESA */ { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2, 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 640x480-75 VESA */ { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3, 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 640x480-85 VESA */ { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3, 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 800x600-60 VESA */ { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 800x600-75 VESA */ { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 800x600-85 VESA */ { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1024x768-60 VESA */ { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6, 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1024x768-75 VESA */ { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1024x768-85 VESA */ { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1280x960-60 VESA */ { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1280x960-85 VESA */ { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1280x1024-60 VESA */ { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1280x1024-75 VESA */ { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1280x1024-85 VESA */ { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1600x1200-60 VESA */ { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1600x1200-75 VESA */ { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, /* 1600x1200-85 VESA */ { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, }; static int gxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { if (var->xres > 1600 || var->yres > 1200) return -EINVAL; if ((var->xres > 1280 || var->yres > 1024) && var->bits_per_pixel > 16) return -EINVAL; if (var->bits_per_pixel == 32) { var->red.offset = 16; var->red.length = 8; var->green.offset = 8; var->green.length = 8; var->blue.offset = 0; var->blue.length = 8; } else if (var->bits_per_pixel == 16) { var->red.offset = 11; var->red.length = 5; var->green.offset = 5; var->green.length = 6; var->blue.offset = 0; var->blue.length = 5; } else if (var->bits_per_pixel == 8) { var->red.offset = 0; var->red.length = 8; var->green.offset = 0; var->green.length = 8; var->blue.offset = 0; var->blue.length = 8; } else return -EINVAL; var->transp.offset = 0; var->transp.length = 0; /* Enough video memory? */ if (gx_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len) return -EINVAL; /* FIXME: Check timing parameters here? */ return 0; } static int gxfb_set_par(struct fb_info *info) { if (info->var.bits_per_pixel > 8) { info->fix.visual = FB_VISUAL_TRUECOLOR; fb_dealloc_cmap(&info->cmap); } else { info->fix.visual = FB_VISUAL_PSEUDOCOLOR; fb_alloc_cmap(&info->cmap, 1<var.bits_per_pixel, 0); } info->fix.line_length = gx_line_delta(info->var.xres, info->var.bits_per_pixel); gx_set_mode(info); return 0; } static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) { chan &= 0xffff; chan >>= 16 - bf->length; return chan << bf->offset; } static int gxfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { if (info->var.grayscale) { /* grayscale = 0.30*R + 0.59*G + 0.11*B */ red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; } /* Truecolor has hardware independent palette */ if (info->fix.visual == FB_VISUAL_TRUECOLOR) { u32 *pal = info->pseudo_palette; u32 v; if (regno >= 16) return -EINVAL; v = chan_to_field(red, &info->var.red); v |= chan_to_field(green, &info->var.green); v |= chan_to_field(blue, &info->var.blue); pal[regno] = v; } else { if (regno >= 256) return -EINVAL; gx_set_hw_palette_reg(info, regno, red, green, blue); } return 0; } static int gxfb_blank(int blank_mode, struct fb_info *info) { return gx_blank_display(info, blank_mode); } static int __init gxfb_map_video_memory(struct fb_info *info, struct pci_dev *dev) { struct gxfb_par *par = info->par; int ret; ret = pci_enable_device(dev); if (ret < 0) return ret; ret = pci_request_region(dev, 3, "gxfb (video processor)"); if (ret < 0) return ret; par->vid_regs = ioremap(pci_resource_start(dev, 3), pci_resource_len(dev, 3)); if (!par->vid_regs) return -ENOMEM; ret = pci_request_region(dev, 2, "gxfb (display controller)"); if (ret < 0) return ret; par->dc_regs = ioremap(pci_resource_start(dev, 2), pci_resource_len(dev, 2)); if (!par->dc_regs) return -ENOMEM; ret = pci_request_region(dev, 1, "gxfb (graphics processor)"); if (ret < 0) return ret; par->gp_regs = ioremap(pci_resource_start(dev, 1), pci_resource_len(dev, 1)); if (!par->gp_regs) return -ENOMEM; ret = pci_request_region(dev, 0, "gxfb (framebuffer)"); if (ret < 0) return ret; info->fix.smem_start = pci_resource_start(dev, 0); info->fix.smem_len = vram ? vram : gx_frame_buffer_size(); info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); if (!info->screen_base) return -ENOMEM; /* Set the 16MiB aligned base address of the graphics memory region * in the display controller */ write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000); dev_info(&dev->dev, "%d KiB of video memory at 0x%lx\n", info->fix.smem_len / 1024, info->fix.smem_start); return 0; } static struct fb_ops gxfb_ops = { .owner = THIS_MODULE, .fb_check_var = gxfb_check_var, .fb_set_par = gxfb_set_par, .fb_setcolreg = gxfb_setcolreg, .fb_blank = gxfb_blank, /* No HW acceleration for now. */ .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, }; static struct fb_info * __init gxfb_init_fbinfo(struct device *dev) { struct gxfb_par *par; struct fb_info *info; /* Alloc enough space for the pseudo palette. */ info = framebuffer_alloc(sizeof(struct gxfb_par) + sizeof(u32) * 16, dev); if (!info) return NULL; par = info->par; strcpy(info->fix.id, "Geode GX"); info->fix.type = FB_TYPE_PACKED_PIXELS; info->fix.type_aux = 0; info->fix.xpanstep = 0; info->fix.ypanstep = 0; info->fix.ywrapstep = 0; info->fix.accel = FB_ACCEL_NONE; info->var.nonstd = 0; info->var.activate = FB_ACTIVATE_NOW; info->var.height = -1; info->var.width = -1; info->var.accel_flags = 0; info->var.vmode = FB_VMODE_NONINTERLACED; info->fbops = &gxfb_ops; info->flags = FBINFO_DEFAULT; info->node = -1; info->pseudo_palette = (void *)par + sizeof(struct gxfb_par); info->var.grayscale = 0; return info; } #ifdef CONFIG_PM static int gxfb_suspend(struct pci_dev *pdev, pm_message_t state) { struct fb_info *info = pci_get_drvdata(pdev); if (state.event == PM_EVENT_SUSPEND) { acquire_console_sem(); gx_powerdown(info); fb_set_suspend(info, 1); release_console_sem(); } /* there's no point in setting PCI states; we emulate PCI, so * we don't end up getting power savings anyways */ return 0; } static int gxfb_resume(struct pci_dev *pdev) { struct fb_info *info = pci_get_drvdata(pdev); int ret; acquire_console_sem(); ret = gx_powerup(info); if (ret) { printk(KERN_ERR "gxfb: power up failed!\n"); return ret; } fb_set_suspend(info, 0); release_console_sem(); return 0; } #endif static int __init gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct gxfb_par *par; struct fb_info *info; int ret; unsigned long val; info = gxfb_init_fbinfo(&pdev->dev); if (!info) return -ENOMEM; par = info->par; if ((ret = gxfb_map_video_memory(info, pdev)) < 0) { dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n"); goto err; } /* Figure out if this is a TFT or CRT part */ rdmsrl(MSR_GX_GLD_MSR_CONFIG, val); if ((val & MSR_GX_GLD_MSR_CONFIG_FP) == MSR_GX_GLD_MSR_CONFIG_FP) par->enable_crt = 0; else par->enable_crt = 1; ret = fb_find_mode(&info->var, info, mode_option, gx_modedb, ARRAY_SIZE(gx_modedb), NULL, 16); if (ret == 0 || ret == 4) { dev_err(&pdev->dev, "could not find valid video mode\n"); ret = -EINVAL; goto err; } /* Clear the frame buffer of garbage. */ memset_io(info->screen_base, 0, info->fix.smem_len); gxfb_check_var(&info->var, info); gxfb_set_par(info); if (register_framebuffer(info) < 0) { ret = -EINVAL; goto err; } pci_set_drvdata(pdev, info); printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id); return 0; err: if (info->screen_base) { iounmap(info->screen_base); pci_release_region(pdev, 0); } if (par->vid_regs) { iounmap(par->vid_regs); pci_release_region(pdev, 3); } if (par->dc_regs) { iounmap(par->dc_regs); pci_release_region(pdev, 2); } if (par->gp_regs) { iounmap(par->gp_regs); pci_release_region(pdev, 1); } if (info) framebuffer_release(info); return ret; } static void gxfb_remove(struct pci_dev *pdev) { struct fb_info *info = pci_get_drvdata(pdev); struct gxfb_par *par = info->par; unregister_framebuffer(info); iounmap((void __iomem *)info->screen_base); pci_release_region(pdev, 0); iounmap(par->vid_regs); pci_release_region(pdev, 3); iounmap(par->dc_regs); pci_release_region(pdev, 2); iounmap(par->gp_regs); pci_release_region(pdev, 1); pci_set_drvdata(pdev, NULL); framebuffer_release(info); } static struct pci_device_id gxfb_id_table[] = { { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_GX_VIDEO) }, { 0, } }; MODULE_DEVICE_TABLE(pci, gxfb_id_table); static struct pci_driver gxfb_driver = { .name = "gxfb", .id_table = gxfb_id_table, .probe = gxfb_probe, .remove = gxfb_remove, #ifdef CONFIG_PM .suspend = gxfb_suspend, .resume = gxfb_resume, #endif }; #ifndef MODULE static int __init gxfb_setup(char *options) { char *opt; if (!options || !*options) return 0; while ((opt = strsep(&options, ",")) != NULL) { if (!*opt) continue; mode_option = opt; } return 0; } #endif static int __init gxfb_init(void) { #ifndef MODULE char *option = NULL; if (fb_get_options("gxfb", &option)) return -ENODEV; gxfb_setup(option); #endif return pci_register_driver(&gxfb_driver); } static void __exit gxfb_cleanup(void) { pci_unregister_driver(&gxfb_driver); } module_init(gxfb_init); module_exit(gxfb_cleanup); module_param(mode_option, charp, 0); MODULE_PARM_DESC(mode_option, "video mode (x[-][@])"); module_param(vram, int, 0); MODULE_PARM_DESC(vram, "video memory size"); MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX"); MODULE_LICENSE("GPL");