1 files changed, 676 insertions, 0 deletions

diff --git a/drivers/video/au1100fb.c b/drivers/video/au1100fb.c
new file mode 100644
index 000000000000..cacd88cc84ab
--- /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 */