diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/geode/gx1fb_core.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/video/geode/gx1fb_core.c')
-rw-r--r-- | drivers/video/geode/gx1fb_core.c | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/drivers/video/geode/gx1fb_core.c b/drivers/video/geode/gx1fb_core.c new file mode 100644 index 000000000000..83830d24bcda --- /dev/null +++ b/drivers/video/geode/gx1fb_core.c @@ -0,0 +1,359 @@ +/* + * 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/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_gx1.h" +#include "video_cs5530.h" + +static char mode_option[32] = "640x480-16@60"; +static int crt_option = 1; +static char panel_option[32] = ""; + +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; + + printk(KERN_DEBUG "%s()\n", __FUNCTION__); + + /* 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; + 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 = 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 geodefb_par *par = info->par; + unsigned gx_base; + int fb_len; + + gx_base = gx1_gx_base(); + if (!gx_base) + return -ENODEV; + + par->vid_dev = pci_get_device(PCI_VENDOR_ID_CYRIX, + PCI_DEVICE_ID_CYRIX_5530_VIDEO, NULL); + if (!par->vid_dev) + return -ENODEV; + + par->vid_regs = ioremap(pci_resource_start(par->vid_dev, 1), + pci_resource_len(par->vid_dev, 1)); + if (!par->vid_regs) + return -ENOMEM; + + par->dc_regs = ioremap(gx_base + 0x8300, 0x100); + if (!par->dc_regs) + return -ENOMEM; + + info->fix.smem_start = gx_base + 0x800000; + if ((fb_len = gx1_frame_buffer_size()) < 0) + return -ENOMEM; + info->fix.smem_len = fb_len; + info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); + if (!info->screen_base) + return -ENOMEM; + + printk(KERN_INFO "%s: %d Kibyte of video memory at 0x%lx\n", + info->fix.id, 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, + .fb_cursor = soft_cursor, +}; + +static struct fb_info * __init gx1fb_init_fbinfo(void) +{ + struct fb_info *info; + struct geodefb_par *par; + + /* Alloc enough space for the pseudo palette. */ + info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, NULL); + 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 "%s: invalid 'panel' option -- disabling flat panel\n", + info->fix.id); + if (!par->panel_x) + par->enable_crt = 1; /* fall back to CRT if no panel is specified */ + + return info; +} + + +static struct fb_info *gx1fb_info; + +static int __init gx1fb_init(void) +{ + struct fb_info *info; + struct geodefb_par *par; + int ret; + +#ifndef MODULE + if (fb_get_options("gx1fb", NULL)) + return -ENODEV; +#endif + + info = gx1fb_init_fbinfo(); + if (!info) + return -ENOMEM; + gx1fb_info = info; + + 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)) < 0) { + printk(KERN_ERR "%s: gx1fb_map_video_memory() failed\n", info->fix.id); + goto err; + } + + ret = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 16); + if (ret == 0 || ret == 4) { + printk(KERN_ERR "%s: could not find valid video mode\n", info->fix.id); + 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; + } + 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); + if (par->vid_regs) + iounmap(par->vid_regs); + if (par->dc_regs) + iounmap(par->dc_regs); + if (par->vid_dev) + pci_dev_put(par->vid_dev); + if (info) + framebuffer_release(info); + return ret; +} + +static void __exit gx1fb_cleanup(void) +{ + struct fb_info *info = gx1fb_info; + struct geodefb_par *par = gx1fb_info->par; + + unregister_framebuffer(info); + + iounmap((void __iomem *)info->screen_base); + iounmap(par->vid_regs); + iounmap(par->dc_regs); + + pci_dev_put(par->vid_dev); + + framebuffer_release(info); +} + +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"); |