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154 lines
3.3 KiB
154 lines
3.3 KiB
/* |
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* linux/drivers/video/q40fb.c -- Q40 frame buffer device |
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* |
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* Copyright (C) 2001 |
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* |
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* Richard Zidlicky <[email protected]> |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive for |
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* more details. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/string.h> |
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#include <linux/mm.h> |
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#include <linux/delay.h> |
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#include <linux/interrupt.h> |
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#include <linux/platform_device.h> |
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#include <linux/uaccess.h> |
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#include <asm/setup.h> |
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#include <asm/q40_master.h> |
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#include <linux/fb.h> |
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#include <linux/module.h> |
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#define Q40_PHYS_SCREEN_ADDR 0xFE800000 |
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static struct fb_fix_screeninfo q40fb_fix = { |
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.id = "Q40", |
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.smem_len = 1024*1024, |
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.type = FB_TYPE_PACKED_PIXELS, |
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.visual = FB_VISUAL_TRUECOLOR, |
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.line_length = 1024*2, |
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.accel = FB_ACCEL_NONE, |
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}; |
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static const struct fb_var_screeninfo q40fb_var = { |
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.xres = 1024, |
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.yres = 512, |
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.xres_virtual = 1024, |
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.yres_virtual = 512, |
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.bits_per_pixel = 16, |
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.red = {6, 5, 0}, |
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.green = {11, 5, 0}, |
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.blue = {0, 6, 0}, |
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.activate = FB_ACTIVATE_NOW, |
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.height = 230, |
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.width = 300, |
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.vmode = FB_VMODE_NONINTERLACED, |
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}; |
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static int q40fb_setcolreg(unsigned regno, unsigned red, unsigned green, |
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unsigned blue, unsigned transp, |
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struct fb_info *info) |
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{ |
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/* |
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* Set a single color register. The values supplied have a 16 bit |
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* magnitude. |
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* Return != 0 for invalid regno. |
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*/ |
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if (regno > 255) |
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return 1; |
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red>>=11; |
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green>>=11; |
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blue>>=10; |
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if (regno < 16) { |
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((u32 *)info->pseudo_palette)[regno] = ((red & 31) <<6) | |
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((green & 31) << 11) | |
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(blue & 63); |
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} |
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return 0; |
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} |
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static const struct fb_ops q40fb_ops = { |
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.owner = THIS_MODULE, |
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.fb_setcolreg = q40fb_setcolreg, |
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.fb_fillrect = cfb_fillrect, |
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.fb_copyarea = cfb_copyarea, |
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.fb_imageblit = cfb_imageblit, |
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}; |
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static int q40fb_probe(struct platform_device *dev) |
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{ |
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struct fb_info *info; |
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if (!MACH_IS_Q40) |
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return -ENXIO; |
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/* mapped in q40/config.c */ |
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q40fb_fix.smem_start = Q40_PHYS_SCREEN_ADDR; |
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info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); |
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if (!info) |
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return -ENOMEM; |
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info->var = q40fb_var; |
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info->fix = q40fb_fix; |
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info->fbops = &q40fb_ops; |
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info->flags = FBINFO_DEFAULT; /* not as module for now */ |
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info->pseudo_palette = info->par; |
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info->par = NULL; |
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info->screen_base = (char *) q40fb_fix.smem_start; |
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if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { |
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framebuffer_release(info); |
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return -ENOMEM; |
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} |
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master_outb(3, DISPLAY_CONTROL_REG); |
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if (register_framebuffer(info) < 0) { |
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printk(KERN_ERR "Unable to register Q40 frame buffer\n"); |
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fb_dealloc_cmap(&info->cmap); |
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framebuffer_release(info); |
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return -EINVAL; |
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} |
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fb_info(info, "Q40 frame buffer alive and kicking !\n"); |
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return 0; |
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} |
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static struct platform_driver q40fb_driver = { |
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.probe = q40fb_probe, |
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.driver = { |
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.name = "q40fb", |
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}, |
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}; |
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static struct platform_device q40fb_device = { |
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.name = "q40fb", |
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}; |
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int __init q40fb_init(void) |
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{ |
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int ret = 0; |
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if (fb_get_options("q40fb", NULL)) |
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return -ENODEV; |
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ret = platform_driver_register(&q40fb_driver); |
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if (!ret) { |
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ret = platform_device_register(&q40fb_device); |
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if (ret) |
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platform_driver_unregister(&q40fb_driver); |
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} |
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return ret; |
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} |
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module_init(q40fb_init); |
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MODULE_LICENSE("GPL");
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