--- /dev/null
+/*
+ * Geode LX framebuffer driver.
+ *
+ * Copyright (C) 2007 Advanced Micro Devices, Inc.
+ * Built from gxfb (which is Copyright (C) 2006 Arcom Control Systems Ltd.)
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/console.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/uaccess.h>
+
+#include "lxfb.h"
+
+static char *mode_option;
+static int noclear, nopanel, nocrt;
+static int fbsize;
+
+/* Most of these modes are sorted in ascending order, but
+ * since the first entry in this table is the "default" mode,
+ * we try to make it something sane - 640x480-60 is sane
+ */
+
+const struct fb_videomode geode_modedb[] __initdata = {
+ /* 640x480-60 */
+ { NULL, 60, 640, 480, 39682, 48, 8, 25, 2, 88, 2,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 640x400-70 */
+ { NULL, 70, 640, 400, 39770, 40, 8, 28, 5, 96, 2,
+ FB_SYNC_HOR_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 640x480-70 */
+ { NULL, 70, 640, 480, 35014, 88, 24, 15, 2, 64, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 640x480-72 */
+ { NULL, 72, 640, 480, 32102, 120, 16, 20, 1, 40, 3,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 640x480-75 */
+ { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 640x480-85 */
+ { NULL, 85, 640, 480, 27780, 80, 56, 25, 1, 56, 3,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 640x480-90 */
+ { NULL, 90, 640, 480, 26392, 96, 32, 22, 1, 64, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 640x480-100 */
+ { NULL, 100, 640, 480, 23167, 104, 40, 25, 1, 64, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 640x480-60 */
+ { NULL, 60, 640, 480, 39682, 48, 16, 25, 10, 88, 2,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 800x600-56 */
+ { NULL, 56, 800, 600, 27901, 128, 24, 22, 1, 72, 2,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 800x600-60 */
+ { NULL, 60, 800, 600, 25131, 72, 32, 23, 1, 136, 4,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 800x600-70 */
+ { NULL, 70, 800, 600, 21873, 120, 40, 21, 4, 80, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 800x600-72 */
+ { NULL, 72, 800, 600, 20052, 64, 56, 23, 37, 120, 6,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 800x600-75 */
+ { NULL, 75, 800, 600, 20202, 160, 16, 21, 1, 80, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 800x600-85 */
+ { NULL, 85, 800, 600, 17790, 152, 32, 27, 1, 64, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 800x600-90 */
+ { NULL, 90, 800, 600, 16648, 128, 40, 28, 1, 88, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 800x600-100 */
+ { NULL, 100, 800, 600, 14667, 136, 48, 27, 1, 88, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 800x600-60 */
+ { NULL, 60, 800, 600, 25131, 88, 40, 23, 1, 128, 4,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 1024x768-60 */
+ { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 1024x768-70 */
+ { NULL, 70, 1024, 768, 13346, 144, 24, 29, 3, 136, 6,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 1024x768-72 */
+ { NULL, 72, 1024, 768, 12702, 168, 56, 29, 4, 112, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1024x768-75 */
+ { NULL, 75, 1024, 768, 12703, 176, 16, 28, 1, 96, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1024x768-85 */
+ { NULL, 85, 1024, 768, 10581, 208, 48, 36, 1, 96, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1024x768-90 */
+ { NULL, 90, 1024, 768, 9981, 176, 64, 37, 1, 112, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1024x768-100 */
+ { NULL, 100, 1024, 768, 8825, 184, 72, 42, 1, 112, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1024x768-60 */
+ { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 1152x864-60 */
+ { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1152x864-70 */
+ { NULL, 70, 1152, 864, 10254, 192, 72, 32, 8, 120, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1152x864-72 */
+ { NULL, 72, 1152, 864, 9866, 200, 72, 33, 7, 128, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1152x864-75 */
+ { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1152x864-85 */
+ { NULL, 85, 1152, 864, 8357, 200, 72, 37, 3, 128, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1152x864-90 */
+ { NULL, 90, 1152, 864, 7719, 208, 80, 42, 9, 128, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1152x864-100 */
+ { NULL, 100, 1152, 864, 6947, 208, 80, 48, 3, 128, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1152x864-60 */
+ { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 1280x1024-60 */
+ { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1280x1024-70 */
+ { NULL, 70, 1280, 1024, 7719, 224, 88, 38, 6, 136, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1280x1024-72 */
+ { NULL, 72, 1280, 1024, 7490, 224, 88, 39, 7, 136, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1280x1024-75 */
+ { NULL, 75, 1280, 1024, 7409, 248, 16, 38, 1, 144, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1280x1024-85 */
+ { NULL, 85, 1280, 1024, 6351, 224, 64, 44, 1, 160, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1280x1024-90 */
+ { NULL, 90, 1280, 1024, 5791, 240, 96, 51, 12, 144, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1280x1024-100 */
+ { NULL, 100, 1280, 1024, 5212, 240, 96, 57, 6, 144, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1280x1024-60 */
+ { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 1600x1200-60 */
+ { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1600x1200-70 */
+ { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1600x1200-72 */
+ { NULL, 72, 1600, 1200, 5053, 288, 112, 47, 13, 176, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1600x1200-75 */
+ { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1600x1200-85 */
+ { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1600x1200-90 */
+ { NULL, 90, 1600, 1200, 3981, 304, 128, 60, 1, 176, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1600x1200-100 */
+ { NULL, 100, 1600, 1200, 3563, 304, 128, 67, 1, 176, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1600x1200-60 */
+ { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
+ FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ FB_VMODE_NONINTERLACED, 0 },
+ /* 1920x1440-60 */
+ { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 208, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1920x1440-70 */
+ { NULL, 70, 1920, 1440, 3593, 360, 152, 55, 8, 208, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1920x1440-72 */
+ { NULL, 72, 1920, 1440, 3472, 360, 152, 68, 4, 208, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1920x1440-75 */
+ { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+ /* 1920x1440-85 */
+ { NULL, 85, 1920, 1440, 2929, 368, 152, 68, 1, 216, 3,
+ 0, FB_VMODE_NONINTERLACED, 0 },
+};
+
+static int lxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ if (var->xres > 1920 || var->yres > 1440)
+ return -EINVAL;
+
+ if (var->bits_per_pixel == 32) {
+ var->red.offset = 16; var->red.length = 8;
+ var->green.offset = 8; var->green.length = 8;
+ var->blue.offset = 0; var->blue.length = 8;
+ } else if (var->bits_per_pixel == 16) {
+ var->red.offset = 11; var->red.length = 5;
+ var->green.offset = 5; var->green.length = 6;
+ var->blue.offset = 0; var->blue.length = 5;
+ } else if (var->bits_per_pixel == 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;
+ } else
+ return -EINVAL;
+
+ var->transp.offset = 0; var->transp.length = 0;
+
+ /* Enough video memory? */
+ if ((lx_get_pitch(var->xres, var->bits_per_pixel) * var->yres)
+ > info->fix.smem_len)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int lxfb_set_par(struct fb_info *info)
+{
+ if (info->var.bits_per_pixel > 8) {
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ fb_dealloc_cmap(&info->cmap);
+ } else {
+ info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+ fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
+ }
+
+ info->fix.line_length = lx_get_pitch(info->var.xres,
+ info->var.bits_per_pixel);
+
+ lx_set_mode(info);
+ return 0;
+}
+
+static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
+{
+ chan &= 0xffff;
+ chan >>= 16 - bf->length;
+ return chan << bf->offset;
+}
+
+static int lxfb_setcolreg(unsigned regno, unsigned red, unsigned green,
+ unsigned blue, unsigned transp,
+ struct fb_info *info)
+{
+ if (info->var.grayscale) {
+ /* grayscale = 0.30*R + 0.59*G + 0.11*B */
+ red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
+ }
+
+ /* Truecolor has hardware independent palette */
+ if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+ u32 *pal = info->pseudo_palette;
+ u32 v;
+
+ if (regno >= 16)
+ return -EINVAL;
+
+ v = chan_to_field(red, &info->var.red);
+ v |= chan_to_field(green, &info->var.green);
+ v |= chan_to_field(blue, &info->var.blue);
+
+ pal[regno] = v;
+ } else {
+ if (regno >= 256)
+ return -EINVAL;
+
+ lx_set_palette_reg(info, regno, red, green, blue);
+ }
+
+ return 0;
+}
+
+static int lxfb_blank(int blank_mode, struct fb_info *info)
+{
+ return lx_blank_display(info, blank_mode);
+}
+
+
+static int __init lxfb_map_video_memory(struct fb_info *info,
+ struct pci_dev *dev)
+{
+ struct lxfb_par *par = info->par;
+ int ret;
+
+ ret = pci_enable_device(dev);
+
+ if (ret)
+ return ret;
+
+ ret = pci_request_region(dev, 0, "lxfb-framebuffer");
+
+ if (ret)
+ return ret;
+
+ ret = pci_request_region(dev, 1, "lxfb-gp");
+
+ if (ret)
+ return ret;
+
+ ret = pci_request_region(dev, 2, "lxfb-vg");
+
+ if (ret)
+ return ret;
+
+ ret = pci_request_region(dev, 3, "lxfb-vip");
+
+ if (ret)
+ return ret;
+
+ info->fix.smem_start = pci_resource_start(dev, 0);
+ info->fix.smem_len = fbsize ? fbsize : lx_framebuffer_size();
+
+ info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
+
+ ret = -ENOMEM;
+
+ if (info->screen_base == NULL)
+ return ret;
+
+ par->gp_regs = ioremap(pci_resource_start(dev, 1),
+ pci_resource_len(dev, 1));
+
+ if (par->gp_regs == NULL)
+ return ret;
+
+ par->dc_regs = ioremap(pci_resource_start(dev, 2),
+ pci_resource_len(dev, 2));
+
+ if (par->dc_regs == NULL)
+ return ret;
+
+ par->df_regs = ioremap(pci_resource_start(dev, 3),
+ pci_resource_len(dev, 3));
+
+ if (par->df_regs == NULL)
+ return ret;
+
+ writel(DC_UNLOCK_CODE, par->dc_regs + DC_UNLOCK);
+
+ writel(info->fix.smem_start & 0xFF000000,
+ par->dc_regs + DC_PHY_MEM_OFFSET);
+
+ writel(0, par->dc_regs + DC_UNLOCK);
+
+ dev_info(&dev->dev, "%d KB of video memory at 0x%lx\n",
+ info->fix.smem_len / 1024, info->fix.smem_start);
+
+ return 0;
+}
+
+static struct fb_ops lxfb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = lxfb_check_var,
+ .fb_set_par = lxfb_set_par,
+ .fb_setcolreg = lxfb_setcolreg,
+ .fb_blank = lxfb_blank,
+ /* No HW acceleration for now. */
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+};
+
+static struct fb_info * __init lxfb_init_fbinfo(struct device *dev)
+{
+ struct lxfb_par *par;
+ struct fb_info *info;
+
+ /* Alloc enough space for the pseudo palette. */
+ info = framebuffer_alloc(sizeof(struct lxfb_par) + sizeof(u32) * 16,
+ dev);
+ if (!info)
+ return NULL;
+
+ par = info->par;
+
+ strcpy(info->fix.id, "Geode LX");
+
+ info->fix.type = FB_TYPE_PACKED_PIXELS;
+ info->fix.type_aux = 0;
+ info->fix.xpanstep = 0;
+ info->fix.ypanstep = 0;
+ info->fix.ywrapstep = 0;
+ info->fix.accel = FB_ACCEL_NONE;
+
+ info->var.nonstd = 0;
+ info->var.activate = FB_ACTIVATE_NOW;
+ info->var.height = -1;
+ info->var.width = -1;
+ info->var.accel_flags = 0;
+ info->var.vmode = FB_VMODE_NONINTERLACED;
+
+ info->fbops = &lxfb_ops;
+ info->flags = FBINFO_DEFAULT;
+ info->node = -1;
+
+ info->pseudo_palette = (void *)par + sizeof(struct lxfb_par);
+
+ info->var.grayscale = 0;
+
+ return info;
+}
+
+static int __init lxfb_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct lxfb_par *par;
+ struct fb_info *info;
+ int ret;
+
+ struct fb_videomode *modedb_ptr;
+ int modedb_size;
+
+ info = lxfb_init_fbinfo(&pdev->dev);
+
+ if (info == NULL)
+ return -ENOMEM;
+
+ par = info->par;
+
+ ret = lxfb_map_video_memory(info, pdev);
+
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "failed to map frame buffer or controller registers\n");
+ goto err;
+ }
+
+ /* Set up the desired outputs */
+
+ par->output = 0;
+ par->output |= (nopanel) ? 0 : OUTPUT_PANEL;
+ par->output |= (nocrt) ? 0 : OUTPUT_CRT;
+
+ /* Set up the mode database */
+
+ modedb_ptr = (struct fb_videomode *) geode_modedb;
+ modedb_size = ARRAY_SIZE(geode_modedb);
+
+ ret = fb_find_mode(&info->var, info, mode_option,
+ modedb_ptr, modedb_size, NULL, 16);
+
+ if (ret == 0 || ret == 4) {
+ dev_err(&pdev->dev, "could not find valid video mode\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ /* Clear the screen of garbage, unless noclear was specified,
+ * in which case we assume the user knows what he is doing */
+
+ if (!noclear)
+ memset_io(info->screen_base, 0, info->fix.smem_len);
+
+ /* Set the mode */
+
+ lxfb_check_var(&info->var, info);
+ lxfb_set_par(info);
+
+ if (register_framebuffer(info) < 0) {
+ ret = -EINVAL;
+ goto err;
+ }
+ pci_set_drvdata(pdev, info);
+ printk(KERN_INFO "fb%d: %s frame buffer device\n",
+ info->node, info->fix.id);
+
+ return 0;
+
+err:
+ if (info->screen_base) {
+ iounmap(info->screen_base);
+ pci_release_region(pdev, 0);
+ }
+ if (par->gp_regs) {
+ iounmap(par->gp_regs);
+ pci_release_region(pdev, 1);
+ }
+ if (par->dc_regs) {
+ iounmap(par->dc_regs);
+ pci_release_region(pdev, 2);
+ }
+ if (par->df_regs) {
+ iounmap(par->df_regs);
+ pci_release_region(pdev, 3);
+ }
+
+ if (info)
+ framebuffer_release(info);
+
+ return ret;
+}
+
+static void lxfb_remove(struct pci_dev *pdev)
+{
+ struct fb_info *info = pci_get_drvdata(pdev);
+ struct lxfb_par *par = info->par;
+
+ unregister_framebuffer(info);
+
+ iounmap(info->screen_base);
+ pci_release_region(pdev, 0);
+
+ iounmap(par->gp_regs);
+ pci_release_region(pdev, 1);
+
+ iounmap(par->dc_regs);
+ pci_release_region(pdev, 2);
+
+ iounmap(par->df_regs);
+ pci_release_region(pdev, 3);
+
+ pci_set_drvdata(pdev, NULL);
+ framebuffer_release(info);
+}
+
+static struct pci_device_id lxfb_id_table[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LX_VIDEO) },
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, lxfb_id_table);
+
+static struct pci_driver lxfb_driver = {
+ .name = "lxfb",
+ .id_table = lxfb_id_table,
+ .probe = lxfb_probe,
+ .remove = lxfb_remove,
+};
+
+#ifndef MODULE
+static int __init lxfb_setup(char *options)
+{
+ char *opt;
+
+ if (!options || !*options)
+ return 0;
+
+ while (1) {
+ char *opt = strsep(&options, ",");
+
+ if (opt == NULL)
+ break;
+
+ if (!*opt)
+ continue;
+
+ if (!strncmp(opt, "fbsize:", 7))
+ fbsize = simple_strtoul(opt+7, NULL, 0);
+ else if (!strcmp(opt, "noclear"))
+ noclear = 1;
+ else if (!strcmp(opt, "nopanel"))
+ nopanel = 1;
+ else if (!strcmp(opt, "nocrt"))
+ nocrt = 1;
+ else
+ mode_option = opt;
+ }
+
+ return 0;
+}
+#endif
+
+static int __init lxfb_init(void)
+{
+#ifndef MODULE
+ char *option = NULL;
+
+ if (fb_get_options("lxfb", &option))
+ return -ENODEV;
+
+ lxfb_setup(option);
+#endif
+ return pci_register_driver(&lxfb_driver);
+}
+static void __exit lxfb_cleanup(void)
+{
+ pci_unregister_driver(&lxfb_driver);
+}
+
+module_init(lxfb_init);
+module_exit(lxfb_cleanup);
+
+module_param(mode_option, charp, 0);
+MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
+
+module_param(fbsize, int, 0);
+MODULE_PARM_DESC(fbsize, "video memory size");
+
+MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
+MODULE_LICENSE("GPL");
--- /dev/null
+/* Geode LX framebuffer driver
+ *
+ * Copyright (C) 2006-2007, Advanced Micro Devices,Inc.
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+
+#include "lxfb.h"
+
+/* TODO
+ * Support panel scaling
+ * Add acceleration
+ * Add support for interlacing (TV out)
+ * Support compression
+ */
+
+/* This is the complete list of PLL frequencies that we can set -
+ * we will choose the closest match to the incoming clock.
+ * freq is the frequency of the dotclock * 1000 (for example,
+ * 24823 = 24.983 Mhz).
+ * pllval is the corresponding PLL value
+*/
+
+static const struct {
+ unsigned int pllval;
+ unsigned int freq;
+} pll_table[] = {
+ { 0x000031AC, 24923 },
+ { 0x0000215D, 25175 },
+ { 0x00001087, 27000 },
+ { 0x0000216C, 28322 },
+ { 0x0000218D, 28560 },
+ { 0x000010C9, 31200 },
+ { 0x00003147, 31500 },
+ { 0x000010A7, 33032 },
+ { 0x00002159, 35112 },
+ { 0x00004249, 35500 },
+ { 0x00000057, 36000 },
+ { 0x0000219A, 37889 },
+ { 0x00002158, 39168 },
+ { 0x00000045, 40000 },
+ { 0x00000089, 43163 },
+ { 0x000010E7, 44900 },
+ { 0x00002136, 45720 },
+ { 0x00003207, 49500 },
+ { 0x00002187, 50000 },
+ { 0x00004286, 56250 },
+ { 0x000010E5, 60065 },
+ { 0x00004214, 65000 },
+ { 0x00001105, 68179 },
+ { 0x000031E4, 74250 },
+ { 0x00003183, 75000 },
+ { 0x00004284, 78750 },
+ { 0x00001104, 81600 },
+ { 0x00006363, 94500 },
+ { 0x00005303, 97520 },
+ { 0x00002183, 100187 },
+ { 0x00002122, 101420 },
+ { 0x00001081, 108000 },
+ { 0x00006201, 113310 },
+ { 0x00000041, 119650 },
+ { 0x000041A1, 129600 },
+ { 0x00002182, 133500 },
+ { 0x000041B1, 135000 },
+ { 0x00000051, 144000 },
+ { 0x000041E1, 148500 },
+ { 0x000062D1, 157500 },
+ { 0x000031A1, 162000 },
+ { 0x00000061, 169203 },
+ { 0x00004231, 172800 },
+ { 0x00002151, 175500 },
+ { 0x000052E1, 189000 },
+ { 0x00000071, 192000 },
+ { 0x00003201, 198000 },
+ { 0x00004291, 202500 },
+ { 0x00001101, 204750 },
+ { 0x00007481, 218250 },
+ { 0x00004170, 229500 },
+ { 0x00006210, 234000 },
+ { 0x00003140, 251182 },
+ { 0x00006250, 261000 },
+ { 0x000041C0, 278400 },
+ { 0x00005220, 280640 },
+ { 0x00000050, 288000 },
+ { 0x000041E0, 297000 },
+ { 0x00002130, 320207 }
+};
+
+
+static void lx_set_dotpll(u32 pllval)
+{
+ u32 dotpll_lo, dotpll_hi;
+ int i;
+
+ rdmsr(MSR_LX_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
+
+ if ((dotpll_lo & GLCP_DOTPLL_LOCK) && (dotpll_hi == pllval))
+ return;
+
+ dotpll_hi = pllval;
+ dotpll_lo &= ~(GLCP_DOTPLL_BYPASS | GLCP_DOTPLL_HALFPIX);
+ dotpll_lo |= GLCP_DOTPLL_RESET;
+
+ wrmsr(MSR_LX_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
+
+ /* Wait 100us for the PLL to lock */
+
+ udelay(100);
+
+ /* Now, loop for the lock bit */
+
+ for (i = 0; i < 1000; i++) {
+ rdmsr(MSR_LX_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
+ if (dotpll_lo & GLCP_DOTPLL_LOCK)
+ break;
+ }
+
+ /* Clear the reset bit */
+
+ dotpll_lo &= ~GLCP_DOTPLL_RESET;
+ wrmsr(MSR_LX_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
+}
+
+/* Set the clock based on the frequency specified by the current mode */
+
+static void lx_set_clock(struct fb_info *info)
+{
+ unsigned int diff, min, best = 0;
+ unsigned int freq, i;
+
+ freq = (unsigned int) (0x3b9aca00 / info->var.pixclock);
+
+ min = abs(pll_table[0].freq - freq);
+
+ for (i = 0; i < ARRAY_SIZE(pll_table); i++) {
+ diff = abs(pll_table[i].freq - freq);
+ if (diff < min) {
+ min = diff;
+ best = i;
+ }
+ }
+
+ lx_set_dotpll(pll_table[best].pllval & 0x7FFF);
+}
+
+static void lx_graphics_disable(struct fb_info *info)
+{
+ struct lxfb_par *par = info->par;
+ unsigned int val, gcfg;
+
+ /* Note: This assumes that the video is in a quitet state */
+
+ writel(0, par->df_regs + DF_ALPHA_CONTROL_1);
+ writel(0, par->df_regs + DF_ALPHA_CONTROL_1 + 32);
+ writel(0, par->df_regs + DF_ALPHA_CONTROL_1 + 64);
+
+ /* Turn off the VGA and video enable */
+ val = readl (par->dc_regs + DC_GENERAL_CFG) &
+ ~(DC_GCFG_VGAE | DC_GCFG_VIDE);
+
+ writel(val, par->dc_regs + DC_GENERAL_CFG);
+
+ val = readl(par->df_regs + DF_VIDEO_CFG) & ~DF_VCFG_VID_EN;
+ writel(val, par->df_regs + DF_VIDEO_CFG);
+
+ writel( DC_IRQ_MASK | DC_VSYNC_IRQ_MASK |
+ DC_IRQ_STATUS | DC_VSYNC_IRQ_STATUS,
+ par->dc_regs + DC_IRQ);
+
+ val = readl(par->dc_regs + DC_GENLCK_CTRL) & ~DC_GENLCK_ENABLE;
+ writel(val, par->dc_regs + DC_GENLCK_CTRL);
+
+ val = readl(par->dc_regs + DC_COLOR_KEY) & ~DC_CLR_KEY_ENABLE;
+ writel(val & ~DC_CLR_KEY_ENABLE, par->dc_regs + DC_COLOR_KEY);
+
+ /* We don't actually blank the panel, due to the long latency
+ involved with bringing it back */
+
+ val = readl(par->df_regs + DF_MISC) | DF_MISC_DAC_PWRDN;
+ writel(val, par->df_regs + DF_MISC);
+
+ /* Turn off the display */
+
+ val = readl(par->df_regs + DF_DISPLAY_CFG);
+ writel(val & ~(DF_DCFG_CRT_EN | DF_DCFG_HSYNC_EN | DF_DCFG_VSYNC_EN |
+ DF_DCFG_DAC_BL_EN), par->df_regs + DF_DISPLAY_CFG);
+
+ gcfg = readl(par->dc_regs + DC_GENERAL_CFG);
+ gcfg &= ~(DC_GCFG_CMPE | DC_GCFG_DECE);
+ writel(gcfg, par->dc_regs + DC_GENERAL_CFG);
+
+ /* Turn off the TGEN */
+ val = readl(par->dc_regs + DC_DISPLAY_CFG);
+ val &= ~DC_DCFG_TGEN;
+ writel(val, par->dc_regs + DC_DISPLAY_CFG);
+
+ /* Wait 1000 usecs to ensure that the TGEN is clear */
+ udelay(1000);
+
+ /* Turn off the FIFO loader */
+
+ gcfg &= ~DC_GCFG_DFLE;
+ writel(gcfg, par->dc_regs + DC_GENERAL_CFG);
+
+ /* Lastly, wait for the GP to go idle */
+
+ do {
+ val = readl(par->gp_regs + GP_BLT_STATUS);
+ } while ((val & GP_BS_BLT_BUSY) || !(val & GP_BS_CB_EMPTY));
+}
+
+static void lx_graphics_enable(struct fb_info *info)
+{
+ struct lxfb_par *par = info->par;
+ u32 temp, config;
+
+ /* Set the video request register */
+ writel(0, par->df_regs + DF_VIDEO_REQUEST);
+
+ /* Set up the polarities */
+
+ config = readl(par->df_regs + DF_DISPLAY_CFG);
+
+ config &= ~(DF_DCFG_CRT_SYNC_SKW_MASK | DF_DCFG_PWR_SEQ_DLY_MASK |
+ DF_DCFG_CRT_HSYNC_POL | DF_DCFG_CRT_VSYNC_POL);
+
+ config |= (DF_DCFG_CRT_SYNC_SKW_INIT | DF_DCFG_PWR_SEQ_DLY_INIT |
+ DF_DCFG_GV_PAL_BYP);
+
+ if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
+ config |= DF_DCFG_CRT_HSYNC_POL;
+
+ if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
+ config |= DF_DCFG_CRT_VSYNC_POL;
+
+ if (par->output & OUTPUT_PANEL) {
+ u32 msrlo, msrhi;
+
+ writel(DF_DEFAULT_TFT_PMTIM1,
+ par->df_regs + DF_PANEL_TIM1);
+ writel(DF_DEFAULT_TFT_PMTIM2,
+ par->df_regs + DF_PANEL_TIM2);
+ writel(DF_DEFAULT_TFT_DITHCTL,
+ par->df_regs + DF_DITHER_CONTROL);
+
+ msrlo = DF_DEFAULT_TFT_PAD_SEL_LOW;
+ msrhi = DF_DEFAULT_TFT_PAD_SEL_HIGH;
+
+ wrmsr(MSR_LX_DF_PADSEL, msrlo, msrhi);
+ }
+
+ if (par->output & OUTPUT_CRT) {
+ config |= DF_DCFG_CRT_EN | DF_DCFG_HSYNC_EN |
+ DF_DCFG_VSYNC_EN | DF_DCFG_DAC_BL_EN;
+ }
+
+ writel(config, par->df_regs + DF_DISPLAY_CFG);
+
+ /* Turn the CRT dacs back on */
+
+ if (par->output & OUTPUT_CRT) {
+ temp = readl(par->df_regs + DF_MISC);
+ temp &= ~(DF_MISC_DAC_PWRDN | DF_MISC_A_PWRDN);
+ writel(temp, par->df_regs + DF_MISC);
+ }
+
+ /* Turn the panel on (if it isn't already) */
+
+ if (par->output & OUTPUT_PANEL) {
+ temp = readl(par->df_regs + DF_FP_PM);
+
+ if (!(temp & 0x09))
+ writel(temp | DF_FP_PM_P, par->df_regs + DF_FP_PM);
+ }
+
+ temp = readl(par->df_regs + DF_MISC);
+ temp = readl(par->df_regs + DF_DISPLAY_CFG);
+}
+
+unsigned int lx_framebuffer_size(void)
+{
+ unsigned int val;
+
+ /* The frame buffer size is reported by a VSM in VSA II */
+ /* Virtual Register Class = 0x02 */
+ /* VG_MEM_SIZE (1MB units) = 0x00 */
+
+ outw(0xFC53, 0xAC1C);
+ outw(0x0200, 0xAC1C);
+
+ val = (unsigned int)(inw(0xAC1E)) & 0xFE;
+ return (val << 20);
+}
+
+void lx_set_mode(struct fb_info *info)
+{
+ struct lxfb_par *par = info->par;
+ u64 msrval;
+
+ unsigned int max, dv, val, size;
+
+ unsigned int gcfg, dcfg;
+ int hactive, hblankstart, hsyncstart, hsyncend, hblankend, htotal;
+ int vactive, vblankstart, vsyncstart, vsyncend, vblankend, vtotal;
+
+ /* Unlock the DC registers */
+ writel(DC_UNLOCK_CODE, par->dc_regs + DC_UNLOCK);
+
+ lx_graphics_disable(info);
+
+ lx_set_clock(info);
+
+ /* Set output mode */
+
+ rdmsrl(MSR_LX_DF_GLCONFIG, msrval);
+ msrval &= ~DF_CONFIG_OUTPUT_MASK;
+
+ if (par->output & OUTPUT_PANEL) {
+ msrval |= DF_OUTPUT_PANEL;
+
+ if (par->output & OUTPUT_CRT)
+ msrval |= DF_SIMULTANEOUS_CRT_AND_FP;
+ else
+ msrval &= ~DF_SIMULTANEOUS_CRT_AND_FP;
+ } else {
+ msrval |= DF_OUTPUT_CRT;
+ }
+
+ wrmsrl(MSR_LX_DF_GLCONFIG, msrval);
+
+ /* Clear the various buffers */
+ /* FIXME: Adjust for panning here */
+
+ writel(0, par->dc_regs + DC_FB_START);
+ writel(0, par->dc_regs + DC_CB_START);
+ writel(0, par->dc_regs + DC_CURSOR_START);
+
+ /* FIXME: Add support for interlacing */
+ /* FIXME: Add support for scaling */
+
+ val = readl(par->dc_regs + DC_GENLCK_CTRL);
+ val &= ~(DC_GC_ALPHA_FLICK_ENABLE |
+ DC_GC_FLICKER_FILTER_ENABLE | DC_GC_FLICKER_FILTER_MASK);
+
+ /* Default scaling params */
+
+ writel((0x4000 << 16) | 0x4000, par->dc_regs + DC_GFX_SCALE);
+ writel(0, par->dc_regs + DC_IRQ_FILT_CTL);
+ writel(val, par->dc_regs + DC_GENLCK_CTRL);
+
+ /* FIXME: Support compression */
+
+ if (info->fix.line_length > 4096)
+ dv = DC_DV_LINE_SIZE_8192;
+ else if (info->fix.line_length > 2048)
+ dv = DC_DV_LINE_SIZE_4096;
+ else if (info->fix.line_length > 1024)
+ dv = DC_DV_LINE_SIZE_2048;
+ else
+ dv = DC_DV_LINE_SIZE_1024;
+
+ max = info->fix.line_length * info->var.yres;
+ max = (max + 0x3FF) & 0xFFFFFC00;
+
+ writel(max | DC_DV_TOP_ENABLE, par->dc_regs + DC_DV_TOP);
+
+ val = readl(par->dc_regs + DC_DV_CTL) & ~DC_DV_LINE_SIZE_MASK;
+ writel(val | dv, par->dc_regs + DC_DV_CTL);
+
+ size = info->var.xres * (info->var.bits_per_pixel >> 3);
+
+ writel(info->fix.line_length >> 3, par->dc_regs + DC_GRAPHICS_PITCH);
+ writel((size + 7) >> 3, par->dc_regs + DC_LINE_SIZE);
+
+ /* Set default watermark values */
+
+ rdmsrl(MSR_LX_DC_SPARE, msrval);
+
+ msrval &= ~(DC_SPARE_DISABLE_CFIFO_HGO | DC_SPARE_VFIFO_ARB_SELECT |
+ DC_SPARE_LOAD_WM_LPEN_MASK | DC_SPARE_WM_LPEN_OVRD |
+ DC_SPARE_DISABLE_INIT_VID_PRI | DC_SPARE_DISABLE_VFIFO_WM);
+ msrval |= DC_SPARE_DISABLE_VFIFO_WM | DC_SPARE_DISABLE_INIT_VID_PRI;
+ wrmsrl(MSR_LX_DC_SPARE, msrval);
+
+ gcfg = DC_GCFG_DFLE; /* Display fifo enable */
+ gcfg |= 0xB600; /* Set default priority */
+ gcfg |= DC_GCFG_FDTY; /* Set the frame dirty mode */
+
+ dcfg = DC_DCFG_VDEN; /* Enable video data */
+ dcfg |= DC_DCFG_GDEN; /* Enable graphics */
+ dcfg |= DC_DCFG_TGEN; /* Turn on the timing generator */
+ dcfg |= DC_DCFG_TRUP; /* Update timings immediately */
+ dcfg |= DC_DCFG_PALB; /* Palette bypass in > 8 bpp modes */
+ dcfg |= DC_DCFG_VISL;
+ dcfg |= DC_DCFG_DCEN; /* Always center the display */
+
+ /* Set the current BPP mode */
+
+ switch (info->var.bits_per_pixel) {
+ case 8:
+ dcfg |= DC_DCFG_DISP_MODE_8BPP;
+ break;
+
+ case 16:
+ dcfg |= DC_DCFG_DISP_MODE_16BPP | DC_DCFG_16BPP;
+ break;
+
+ case 32:
+ case 24:
+ dcfg |= DC_DCFG_DISP_MODE_24BPP;
+ break;
+ }
+
+ /* Now - set up the timings */
+
+ hactive = info->var.xres;
+ hblankstart = hactive;
+ hsyncstart = hblankstart + info->var.right_margin;
+ hsyncend = hsyncstart + info->var.hsync_len;
+ hblankend = hsyncend + info->var.left_margin;
+ htotal = hblankend;
+
+ vactive = info->var.yres;
+ vblankstart = vactive;
+ vsyncstart = vblankstart + info->var.lower_margin;
+ vsyncend = vsyncstart + info->var.vsync_len;
+ vblankend = vsyncend + info->var.upper_margin;
+ vtotal = vblankend;
+
+ writel((hactive - 1) | ((htotal - 1) << 16),
+ par->dc_regs + DC_H_ACTIVE_TIMING);
+ writel((hblankstart - 1) | ((hblankend - 1) << 16),
+ par->dc_regs + DC_H_BLANK_TIMING);
+ writel((hsyncstart - 1) | ((hsyncend - 1) << 16),
+ par->dc_regs + DC_H_SYNC_TIMING);
+
+ writel((vactive - 1) | ((vtotal - 1) << 16),
+ par->dc_regs + DC_V_ACTIVE_TIMING);
+
+ writel((vblankstart - 1) | ((vblankend - 1) << 16),
+ par->dc_regs + DC_V_BLANK_TIMING);
+
+ writel((vsyncstart - 1) | ((vsyncend - 1) << 16),
+ par->dc_regs + DC_V_SYNC_TIMING);
+
+ writel( (info->var.xres - 1) << 16 | (info->var.yres - 1),
+ par->dc_regs + DC_FB_ACTIVE);
+
+ /* And re-enable the graphics output */
+ lx_graphics_enable(info);
+
+ /* Write the two main configuration registers */
+ writel(dcfg, par->dc_regs + DC_DISPLAY_CFG);
+ writel(0, par->dc_regs + DC_ARB_CFG);
+ writel(gcfg, par->dc_regs + DC_GENERAL_CFG);
+
+ /* Lock the DC registers */
+ writel(0, par->dc_regs + DC_UNLOCK);
+}
+
+void lx_set_palette_reg(struct fb_info *info, unsigned regno,
+ unsigned red, unsigned green, unsigned blue)
+{
+ struct lxfb_par *par = info->par;
+ int val;
+
+ /* Hardware palette is in RGB 8-8-8 format. */
+
+ val = (red << 8) & 0xff0000;
+ val |= (green) & 0x00ff00;
+ val |= (blue >> 8) & 0x0000ff;
+
+ writel(regno, par->dc_regs + DC_PAL_ADDRESS);
+ writel(val, par->dc_regs + DC_PAL_DATA);
+}
+
+int lx_blank_display(struct fb_info *info, int blank_mode)
+{
+ struct lxfb_par *par = info->par;
+ u32 dcfg, fp_pm;
+ int blank, hsync, vsync;
+
+ /* CRT power saving modes. */
+ switch (blank_mode) {
+ case FB_BLANK_UNBLANK:
+ blank = 0; hsync = 1; vsync = 1;
+ break;
+ case FB_BLANK_NORMAL:
+ blank = 1; hsync = 1; vsync = 1;
+ break;
+ case FB_BLANK_VSYNC_SUSPEND:
+ blank = 1; hsync = 1; vsync = 0;
+ break;
+ case FB_BLANK_HSYNC_SUSPEND:
+ blank = 1; hsync = 0; vsync = 1;
+ break;
+ case FB_BLANK_POWERDOWN:
+ blank = 1; hsync = 0; vsync = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ dcfg = readl(par->df_regs + DF_DISPLAY_CFG);
+ dcfg &= ~(DF_DCFG_DAC_BL_EN
+ | DF_DCFG_HSYNC_EN | DF_DCFG_VSYNC_EN);
+ if (!blank)
+ dcfg |= DF_DCFG_DAC_BL_EN;
+ if (hsync)
+ dcfg |= DF_DCFG_HSYNC_EN;
+ if (vsync)
+ dcfg |= DF_DCFG_VSYNC_EN;
+ writel(dcfg, par->df_regs + DF_DISPLAY_CFG);
+
+ /* Power on/off flat panel */
+
+ if (par->output & OUTPUT_PANEL) {
+ fp_pm = readl(par->df_regs + DF_FP_PM);
+ if (blank_mode == FB_BLANK_POWERDOWN)
+ fp_pm &= ~DF_FP_PM_P;
+ else
+ fp_pm |= DF_FP_PM_P;
+ writel(fp_pm, par->df_regs + DF_FP_PM);
+ }
+
+ return 0;
+}
projects / openwrt / staging / blogic.git / commitdiff