/* * drivers/video/geode/gx1fb_core.c * -- Geode GX1 framebuffer driver * * Copyright (C) 2005 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. */ #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/delay.h> #include <linux/fb.h> #include <linux/init.h> #include <linux/pci.h> #include "geodefb.h" #include "display_gx1.h" #include "video_cs5530.h" static char mode_option[32] = "640x480-16@60"; static int crt_option = 1; static char panel_option[32] = ""; /* Modes relevant to the GX1 (taken from modedb.c) */ static const struct fb_videomode __initdata gx1_modedb[] = { /* 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 }, }; static int gx1_line_delta(int xres, int bpp) { int line_delta = xres * (bpp >> 3); if (line_delta > 2048) line_delta = 4096; else if (line_delta > 1024) line_delta = 2048; else line_delta = 1024; return line_delta; } static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { struct geodefb_par *par = info->par; /* Maximum resolution is 1280x1024. */ if (var->xres > 1280 || var->yres > 1024) return -EINVAL; if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y)) return -EINVAL; /* Only 16 bpp and 8 bpp is supported by the hardware. */ 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; var->transp.offset = 0; var->transp.length = 0; } 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; var->transp.offset = 0; var->transp.length = 0; } else return -EINVAL; /* Enough video memory? */ if (gx1_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 gx1fb_set_par(struct fb_info *info) { struct geodefb_par *par = info->par; if (info->var.bits_per_pixel == 16) info->fix.visual = FB_VISUAL_TRUECOLOR; else info->fix.visual = FB_VISUAL_PSEUDOCOLOR; info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel); par->dc_ops->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 gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { struct geodefb_par *par = info->par; 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; par->dc_ops->set_palette_reg(info, regno, red, green, blue); } return 0; } static int gx1fb_blank(int blank_mode, struct fb_info *info) { struct geodefb_par *par = info->par; return par->vid_ops->blank_display(info, blank_mode); } static int __init gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev) { struct geodefb_par *par = info->par; unsigned gx_base; int fb_len; int ret; gx_base = gx1_gx_base(); if (!gx_base) return -ENODEV; ret = pci_enable_device(dev); if (ret < 0) return ret; ret = pci_request_region(dev, 0, "gx1fb (video)"); if (ret < 0) return ret; par->vid_regs = pci_ioremap_bar(dev, 0); if (!par->vid_regs) return -ENOMEM; if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)")) return -EBUSY; par->dc_regs = ioremap(gx_base + 0x8300, 0x100); if (!par->dc_regs) return -ENOMEM; if ((fb_len = gx1_frame_buffer_size()) < 0) return -ENOMEM; info->fix.smem_start = gx_base + 0x800000; info->fix.smem_len = fb_len; info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); if (!info->screen_base) return -ENOMEM; dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n", info->fix.smem_len / 1024, info->fix.smem_start); return 0; } static int parse_panel_option(struct fb_info *info) { struct geodefb_par *par = info->par; if (strcmp(panel_option, "") != 0) { int x, y; char *s; x = simple_strtol(panel_option, &s, 10); if (!x) return -EINVAL; y = simple_strtol(s + 1, NULL, 10); if (!y) return -EINVAL; par->panel_x = x; par->panel_y = y; } return 0; } static struct fb_ops gx1fb_ops = { .owner = THIS_MODULE, .fb_check_var = gx1fb_check_var, .fb_set_par = gx1fb_set_par, .fb_setcolreg = gx1fb_setcolreg, .fb_blank = gx1fb_blank, /* No HW acceleration for now. */ .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, }; static struct fb_info * __init gx1fb_init_fbinfo(struct device *dev) { struct geodefb_par *par; struct fb_info *info; /* Alloc enough space for the pseudo palette. */ info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev); if (!info) return NULL; par = info->par; strcpy(info->fix.id, "GX1"); 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 = &gx1fb_ops; info->flags = FBINFO_DEFAULT; info->node = -1; info->pseudo_palette = (void *)par + sizeof(struct geodefb_par); info->var.grayscale = 0; /* CRT and panel options */ par->enable_crt = crt_option; if (parse_panel_option(info) < 0) printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n"); if (!par->panel_x) par->enable_crt = 1; /* fall back to CRT if no panel is specified */ if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { framebuffer_release(info); return NULL; } return info; } static int __init gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct geodefb_par *par; struct fb_info *info; int ret; info = gx1fb_init_fbinfo(&pdev->dev); if (!info) return -ENOMEM; par = info->par; /* GX1 display controller and CS5530 video device */ par->dc_ops = &gx1_dc_ops; par->vid_ops = &cs5530_vid_ops; if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) { dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n"); goto err; } ret = fb_find_mode(&info->var, info, mode_option, gx1_modedb, ARRAY_SIZE(gx1_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); gx1fb_check_var(&info->var, info); gx1fb_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, 1); } if (par->dc_regs) { iounmap(par->dc_regs); release_mem_region(gx1_gx_base() + 0x8300, 0x100); } if (info) { fb_dealloc_cmap(&info->cmap); framebuffer_release(info); } return ret; } static void gx1fb_remove(struct pci_dev *pdev) { struct fb_info *info = pci_get_drvdata(pdev); struct geodefb_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, 1); iounmap(par->dc_regs); release_mem_region(gx1_gx_base() + 0x8300, 0x100); fb_dealloc_cmap(&info->cmap); pci_set_drvdata(pdev, NULL); framebuffer_release(info); } #ifndef MODULE static void __init gx1fb_setup(char *options) { char *this_opt; if (!options || !*options) return; while ((this_opt = strsep(&options, ","))) { if (!*this_opt) continue; if (!strncmp(this_opt, "mode:", 5)) strlcpy(mode_option, this_opt + 5, sizeof(mode_option)); else if (!strncmp(this_opt, "crt:", 4)) crt_option = !!simple_strtoul(this_opt + 4, NULL, 0); else if (!strncmp(this_opt, "panel:", 6)) strlcpy(panel_option, this_opt + 6, sizeof(panel_option)); else strlcpy(mode_option, this_opt, sizeof(mode_option)); } } #endif static struct pci_device_id gx1fb_id_table[] = { { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO, PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16, 0xff0000, 0 }, { 0, } }; MODULE_DEVICE_TABLE(pci, gx1fb_id_table); static struct pci_driver gx1fb_driver = { .name = "gx1fb", .id_table = gx1fb_id_table, .probe = gx1fb_probe, .remove = gx1fb_remove, }; static int __init gx1fb_init(void) { #ifndef MODULE char *option = NULL; if (fb_get_options("gx1fb", &option)) return -ENODEV; gx1fb_setup(option); #endif return pci_register_driver(&gx1fb_driver); } static void __exit gx1fb_cleanup(void) { pci_unregister_driver(&gx1fb_driver); } module_init(gx1fb_init); module_exit(gx1fb_cleanup); module_param_string(mode, mode_option, sizeof(mode_option), 0444); MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])"); module_param_named(crt, crt_option, int, 0444); MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)"); module_param_string(panel, panel_option, sizeof(panel_option), 0444); MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)"); MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1"); MODULE_LICENSE("GPL");