diff options
Diffstat (limited to 'drivers/video/geode/gxfb_core.c')
| -rw-r--r-- | drivers/video/geode/gxfb_core.c | 423 |
1 files changed, 423 insertions, 0 deletions
diff --git a/drivers/video/geode/gxfb_core.c b/drivers/video/geode/gxfb_core.c new file mode 100644 index 00000000000000..89c34b15f5d4f7 --- /dev/null +++ b/drivers/video/geode/gxfb_core.c @@ -0,0 +1,423 @@ +/* + * 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 <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/delay.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <linux/pci.h> + +#include "geodefb.h" +#include "display_gx.h" +#include "video_gx.h" + +static char mode_option[32] = "640x480-16@60"; + +/* Modes relevant to the GX (taken from modedb.c) */ +static const struct fb_videomode __initdata gx_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 }, + /* 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) +{ + struct geodefb_par *par = info->par; + + 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<<info->var.bits_per_pixel, 0); + } + + info->fix.line_length = gx_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 gxfb_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 gxfb_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 gxfb_map_video_memory(struct fb_info *info, struct pci_dev *dev) +{ + struct geodefb_par *par = info->par; + int fb_len; + 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, 0, "gxfb (framebuffer)"); + if (ret < 0) + return ret; + if ((fb_len = gx_frame_buffer_size()) < 0) + return -ENOMEM; + info->fix.smem_start = pci_resource_start(dev, 0); + 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 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 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, "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 geodefb_par); + + info->var.grayscale = 0; + + return info; +} + +static int __init gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct geodefb_par *par; + struct fb_info *info; + int ret; + + info = gxfb_init_fbinfo(&pdev->dev); + if (!info) + return -ENOMEM; + par = info->par; + + /* GX display controller and GX video device. */ + par->dc_ops = &gx_dc_ops; + par->vid_ops = &gx_vid_ops; + + if ((ret = gxfb_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, + 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); + } + + pci_disable_device(pdev); + + if (info) + framebuffer_release(info); + return ret; +} + +static void gxfb_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, 3); + + iounmap(par->dc_regs); + pci_release_region(pdev, 2); + + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + + framebuffer_release(info); +} + +static struct pci_device_id gxfb_id_table[] = { + { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_VIDEO, + PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16, + 0xff0000, 0 }, + { 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, +}; + +static int __init gxfb_init(void) +{ +#ifndef MODULE + if (fb_get_options("gxfb", NULL)) + return -ENODEV; +#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_string(mode, mode_option, sizeof(mode_option), 0444); +MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])"); + +MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX"); +MODULE_LICENSE("GPL"); |