| /* |
| * 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_page_range(vma->vm_start, off, |
| 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); |
| |
| /* uncomment this if your driver cannot be unloaded */ |
| /* MOD_INC_USE_COUNT; */ |
| 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 */ |