/* * BRIEF MODULE DESCRIPTION * Au1100 LCD Driver. * * Copyright 2002 MontaVista Software * Author: MontaVista Software, Inc. * ppopov@mvista.com or source@mvista.com * * Copyright 2002 Alchemy Semiconductor * Author: Alchemy Semiconductor * * Based on: * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device * Created 28 Dec 1997 by Geert Uytterhoeven * * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #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 <asm/au1000.h> #include <asm/pb1100.h> #include "au1100fb.h" #include <video/fbcon.h> #include <video/fbcon-mfb.h> #include <video/fbcon-cfb2.h> #include <video/fbcon-cfb4.h> #include <video/fbcon-cfb8.h> #include <video/fbcon-cfb16.h> /* * Sanity check. If this is a new Au1100 based board, search for * the PB1100 ifdefs to make sure you modify the code accordingly. */ #if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100) || defined(CONFIG_MIPS_HYDROGEN3) #else error Unknown Au1100 board #endif #define CMAPSIZE 16 static int my_lcd_index; /* default is zero */ struct known_lcd_panels *p_lcd; AU1100_LCD *p_lcd_reg = (AU1100_LCD *)AU1100_LCD_ADDR; struct au1100fb_info { struct fb_info_gen gen; unsigned long fb_virt_start; unsigned long fb_size; unsigned long fb_phys; int mmaped; int nohwcursor; struct { unsigned red, green, blue, pad; } palette[256]; #if defined(FBCON_HAS_CFB16) u16 fbcon_cmap16[16]; #endif }; struct au1100fb_par { struct fb_var_screeninfo var; int line_length; // in bytes int cmap_len; // color-map length }; static struct au1100fb_info fb_info; static struct au1100fb_par current_par; static struct display disp; int au1100fb_init(void); void au1100fb_setup(char *options, int *ints); static int au1100fb_mmap(struct fb_info *fb, struct file *file, struct vm_area_struct *vma); static int au1100_blank(int blank_mode, struct fb_info_gen *info); static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd, u_long arg, int con, struct fb_info *info); void au1100_nocursor(struct display *p, int mode, int xx, int yy){}; static struct fb_ops au1100fb_ops = { .owner = THIS_MODULE, .fb_get_fix = fbgen_get_fix, .fb_get_var = fbgen_get_var, .fb_set_var = fbgen_set_var, .fb_get_cmap = fbgen_get_cmap, .fb_set_cmap = fbgen_set_cmap, .fb_pan_display = fbgen_pan_display, .fb_ioctl = au1100fb_ioctl, .fb_mmap = au1100fb_mmap, }; static void au1100_detect(void) { /* * This function should detect the current video mode settings * and store it as the default video mode */ /* * Yeh, well, we're not going to change any settings so we're * always stuck with the default ... */ } static int au1100_encode_fix(struct fb_fix_screeninfo *fix, const void *_par, struct fb_info_gen *_info) { struct au1100fb_info *info = (struct au1100fb_info *) _info; struct au1100fb_par *par = (struct au1100fb_par *) _par; struct fb_var_screeninfo *var = &par->var; memset(fix, 0, sizeof(struct fb_fix_screeninfo)); fix->smem_start = info->fb_phys; fix->smem_len = info->fb_size; fix->type = FB_TYPE_PACKED_PIXELS; fix->type_aux = 0; fix->visual = (var->bits_per_pixel == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; fix->ywrapstep = 0; fix->xpanstep = 1; fix->ypanstep = 1; fix->line_length = current_par.line_length; return 0; } static void set_color_bitfields(struct fb_var_screeninfo *var) { switch (var->bits_per_pixel) { case 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; break; case 16: /* RGB 565 */ 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; break; } var->red.msb_right = 0; var->green.msb_right = 0; var->blue.msb_right = 0; var->transp.msb_right = 0; } static int au1100_decode_var(const struct fb_var_screeninfo *var, void *_par, struct fb_info_gen *_info) { struct au1100fb_par *par = (struct au1100fb_par *)_par; /* * Don't allow setting any of these yet: xres and yres don't * make sense for LCD panels. */ if (var->xres != p_lcd->xres || var->yres != p_lcd->yres || var->xres != p_lcd->xres || var->yres != p_lcd->yres) { return -EINVAL; } if(var->bits_per_pixel != p_lcd->bpp) { return -EINVAL; } memset(par, 0, sizeof(struct au1100fb_par)); par->var = *var; /* FIXME */ switch (var->bits_per_pixel) { case 8: par->var.bits_per_pixel = 8; break; case 16: par->var.bits_per_pixel = 16; break; default: printk("color depth %d bpp not supported\n", var->bits_per_pixel); return -EINVAL; } set_color_bitfields(&par->var); par->cmap_len = (par->var.bits_per_pixel == 8) ? 256 : 16; return 0; } static int au1100_encode_var(struct fb_var_screeninfo *var, const void *par, struct fb_info_gen *_info) { *var = ((struct au1100fb_par *)par)->var; return 0; } static void au1100_get_par(void *_par, struct fb_info_gen *_info) { *(struct au1100fb_par *)_par = current_par; } static void au1100_set_par(const void *par, struct fb_info_gen *info) { /* nothing to do: we don't change any settings */ } static int au1100_getcolreg(unsigned regno, unsigned *red, unsigned *green, unsigned *blue, unsigned *transp, struct fb_info *info) { struct au1100fb_info* i = (struct au1100fb_info*)info; if (regno > 255) return 1; *red = i->palette[regno].red; *green = i->palette[regno].green; *blue = i->palette[regno].blue; *transp = 0; return 0; } static int au1100_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { struct au1100fb_info* i = (struct au1100fb_info *)info; u32 rgbcol; if (regno > 255) return 1; i->palette[regno].red = red; i->palette[regno].green = green; i->palette[regno].blue = blue; switch(p_lcd->bpp) { #ifdef FBCON_HAS_CFB8 case 8: red >>= 10; green >>= 10; blue >>= 10; p_lcd_reg->lcd_pallettebase[regno] = (blue&0x1f) | ((green&0x3f)<<5) | ((red&0x1f)<<11); break; #endif #ifdef FBCON_HAS_CFB16 case 16: i->fbcon_cmap16[regno] = ((red & 0xf800) >> 0) | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); break; #endif default: break; } return 0; } static int au1100_blank(int blank_mode, struct fb_info_gen *_info) { switch (blank_mode) { case VESA_NO_BLANKING: /* turn on panel */ //printk("turn on panel\n"); #ifdef CONFIG_MIPS_PB1100 p_lcd_reg->lcd_control |= LCD_CONTROL_GO; au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight, PB1100_G_CONTROL); #endif #ifdef CONFIG_MIPS_HYDROGEN3 /* Turn controller & power supply on, GPIO213 */ au_writel(0x20002000, 0xB1700008); au_writel(0x00040000, 0xB1900108); au_writel(0x01000100, 0xB1700008); #endif au_sync(); break; case VESA_VSYNC_SUSPEND: case VESA_HSYNC_SUSPEND: case VESA_POWERDOWN: /* turn off panel */ //printk("turn off panel\n"); #ifdef CONFIG_MIPS_PB1100 au_writew(au_readw(PB1100_G_CONTROL) & ~p_lcd->mode_backlight, PB1100_G_CONTROL); p_lcd_reg->lcd_control &= ~LCD_CONTROL_GO; #endif au_sync(); break; default: break; } return 0; } static void au1100_set_disp(const void *unused, struct display *disp, struct fb_info_gen *info) { disp->screen_base = (char *)fb_info.fb_virt_start; switch (disp->var.bits_per_pixel) { #ifdef FBCON_HAS_CFB8 case 8: disp->dispsw = &fbcon_cfb8; if (fb_info.nohwcursor) fbcon_cfb8.cursor = au1100_nocursor; break; #endif #ifdef FBCON_HAS_CFB16 case 16: disp->dispsw = &fbcon_cfb16; disp->dispsw_data = fb_info.fbcon_cmap16; if (fb_info.nohwcursor) fbcon_cfb16.cursor = au1100_nocursor; break; #endif default: disp->dispsw = &fbcon_dummy; disp->dispsw_data = NULL; break; } } static int au1100fb_mmap(struct fb_info *_fb, struct file *file, struct vm_area_struct *vma) { unsigned int len; unsigned long start=0, off; struct au1100fb_info *fb = (struct au1100fb_info *)_fb; if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) { return -EINVAL; } start = fb_info.fb_phys & PAGE_MASK; len = PAGE_ALIGN((start & ~PAGE_MASK) + fb_info.fb_size); off = vma->vm_pgoff << PAGE_SHIFT; if ((vma->vm_end - vma->vm_start + off) > len) { return -EINVAL; } off += start; vma->vm_pgoff = off >> PAGE_SHIFT; pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK; //pgprot_val(vma->vm_page_prot) |= _CACHE_CACHABLE_NONCOHERENT; pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6 /* This is an IO map - tell maydump to skip this VMA */ vma->vm_flags |= VM_IO; if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, vma->vm_end - vma->vm_start, vma->vm_page_prot)) { return -EAGAIN; } fb->mmaped = 1; return 0; } int au1100_pan_display(const struct fb_var_screeninfo *var, struct fb_info_gen *info) { return 0; } static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd, u_long arg, int con, struct fb_info *info) { /* nothing to do yet */ return -EINVAL; } static struct fbgen_hwswitch au1100_switch = { au1100_detect, au1100_encode_fix, au1100_decode_var, au1100_encode_var, au1100_get_par, au1100_set_par, au1100_getcolreg, au1100_setcolreg, au1100_pan_display, au1100_blank, au1100_set_disp }; int au1100_setmode(void) { int words; /* FIXME Need to accomodate for swivel mode and 12bpp, <8bpp*/ switch (p_lcd->mode_control & LCD_CONTROL_SM) { case LCD_CONTROL_SM_0: case LCD_CONTROL_SM_180: words = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 32; break; case LCD_CONTROL_SM_90: case LCD_CONTROL_SM_270: /* is this correct? */ words = (p_lcd->xres * p_lcd->bpp) / 8; break; default: printk("mode_control reg not initialized\n"); return -EINVAL; } /* * Setup LCD controller */ p_lcd_reg->lcd_control = p_lcd->mode_control; p_lcd_reg->lcd_intstatus = 0; p_lcd_reg->lcd_intenable = 0; p_lcd_reg->lcd_horztiming = p_lcd->mode_horztiming; p_lcd_reg->lcd_verttiming = p_lcd->mode_verttiming; p_lcd_reg->lcd_clkcontrol = p_lcd->mode_clkcontrol; p_lcd_reg->lcd_words = words - 1; p_lcd_reg->lcd_dmaaddr0 = fb_info.fb_phys; /* turn on panel */ #ifdef CONFIG_MIPS_PB1100 au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight, PB1100_G_CONTROL); #endif #ifdef CONFIG_MIPS_HYDROGEN3 /* Turn controller & power supply on, GPIO213 */ au_writel(0x20002000, 0xB1700008); au_writel(0x00040000, 0xB1900108); au_writel(0x01000100, 0xB1700008); #endif p_lcd_reg->lcd_control |= LCD_CONTROL_GO; return 0; } int __init au1100fb_init(void) { uint32 sys_clksrc; unsigned long page; /* * Get the panel information/display mode and update the registry */ p_lcd = &panels[my_lcd_index]; switch (p_lcd->mode_control & LCD_CONTROL_SM) { case LCD_CONTROL_SM_0: case LCD_CONTROL_SM_180: p_lcd->xres = (p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1; p_lcd->yres = (p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1; break; case LCD_CONTROL_SM_90: case LCD_CONTROL_SM_270: p_lcd->yres = (p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1; p_lcd->xres = (p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1; break; } /* * Panel dimensions x bpp must be divisible by 32 */ if (((p_lcd->yres * p_lcd->bpp) % 32) != 0) printk("VERT %% 32\n"); if (((p_lcd->xres * p_lcd->bpp) % 32) != 0) printk("HORZ %% 32\n"); /* * Allocate LCD framebuffer from system memory */ fb_info.fb_size = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 8; current_par.var.xres = p_lcd->xres; current_par.var.xres_virtual = p_lcd->xres; current_par.var.yres = p_lcd->yres; current_par.var.yres_virtual = p_lcd->yres; current_par.var.bits_per_pixel = p_lcd->bpp; /* FIX!!! only works for 8/16 bpp */ current_par.line_length = p_lcd->xres * p_lcd->bpp / 8; /* in bytes */ fb_info.fb_virt_start = (unsigned long ) __get_free_pages(GFP_ATOMIC | GFP_DMA, get_order(fb_info.fb_size + 0x1000)); if (!fb_info.fb_virt_start) { printk("Unable to allocate fb memory\n"); return -ENOMEM; } fb_info.fb_phys = virt_to_bus((void *)fb_info.fb_virt_start); /* * Set page reserved so that mmap will work. This is necessary * since we'll be remapping normal memory. */ for (page = fb_info.fb_virt_start; page < PAGE_ALIGN(fb_info.fb_virt_start + fb_info.fb_size); page += PAGE_SIZE) { SetPageReserved(virt_to_page(page)); } memset((void *)fb_info.fb_virt_start, 0, fb_info.fb_size); /* set freqctrl now to allow more time to stabilize */ /* zero-out out LCD bits */ sys_clksrc = au_readl(SYS_CLKSRC) & ~0x000003e0; sys_clksrc |= p_lcd->mode_toyclksrc; au_writel(sys_clksrc, SYS_CLKSRC); /* FIXME add check to make sure auxpll is what is expected! */ au1100_setmode(); fb_info.gen.parsize = sizeof(struct au1100fb_par); fb_info.gen.fbhw = &au1100_switch; strcpy(fb_info.gen.info.modename, "Au1100 LCD"); fb_info.gen.info.changevar = NULL; fb_info.gen.info.node = -1; fb_info.gen.info.fbops = &au1100fb_ops; fb_info.gen.info.disp = &disp; fb_info.gen.info.switch_con = &fbgen_switch; fb_info.gen.info.updatevar = &fbgen_update_var; fb_info.gen.info.blank = &fbgen_blank; fb_info.gen.info.flags = FBINFO_FLAG_DEFAULT; /* This should give a reasonable default video mode */ fbgen_get_var(&disp.var, -1, &fb_info.gen.info); fbgen_do_set_var(&disp.var, 1, &fb_info.gen); fbgen_set_disp(-1, &fb_info.gen); fbgen_install_cmap(0, &fb_info.gen); if (register_framebuffer(&fb_info.gen.info) < 0) return -EINVAL; printk(KERN_INFO "fb%d: %s frame buffer device\n", GET_FB_IDX(fb_info.gen.info.node), fb_info.gen.info.modename); return 0; } void au1100fb_cleanup(struct fb_info *info) { unregister_framebuffer(info); } void au1100fb_setup(char *options, int *ints) { char* this_opt; int i; int num_panels = sizeof(panels)/sizeof(struct known_lcd_panels); if (!options || !*options) return; for(this_opt=strtok(options, ","); this_opt; this_opt=strtok(NULL, ",")) { if (!strncmp(this_opt, "panel:", 6)) { #if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100) /* Read Pb1100 Switch S10 ? */ if (!strncmp(this_opt+6, "s10", 3)) { int panel; panel = *(volatile int *)0xAE000008; /* BCSR SWITCHES */ panel >>= 8; panel &= 0x0F; if (panel >= num_panels) panel = 0; my_lcd_index = panel; } else #endif /* Get the panel name, everything else if fixed */ for (i=0; i<num_panels; i++) { if (!strncmp(this_opt+6, panels[i].panel_name, strlen(this_opt))) { my_lcd_index = i; break; } } } else if (!strncmp(this_opt, "nohwcursor", 10)) { printk("nohwcursor\n"); fb_info.nohwcursor = 1; } } printk("au1100fb: Panel %d %s\n", my_lcd_index, panels[my_lcd_index].panel_name); } #ifdef MODULE MODULE_LICENSE("GPL"); int init_module(void) { return au1100fb_init(); } void cleanup_module(void) { au1100fb_cleanup(void); } MODULE_AUTHOR("Pete Popov <ppopov@mvista.com>"); MODULE_DESCRIPTION("Au1100 LCD framebuffer device driver"); #endif /* MODULE */