diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/au1100fb.c |
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/au1100fb.c')
-rw-r--r-- | drivers/video/au1100fb.c | 676 |
1 files changed, 676 insertions, 0 deletions
diff --git a/drivers/video/au1100fb.c b/drivers/video/au1100fb.c new file mode 100644 index 00000000000..cacd88cc84a --- /dev/null +++ b/drivers/video/au1100fb.c @@ -0,0 +1,676 @@ +/* + * 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 */ |