/*
* 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/suspend.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 vram;
static int vt_switch;
/* 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
*/
static struct fb_videomode geode_modedb[] = {
/* 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 },
};
#ifdef CONFIG_OLPC
#include <asm/olpc.h>
static struct fb_videomode olpc_dcon_modedb[] = {
/* The only mode the DCON has is 1200x900 */
{ NULL, 50, 1200, 900, 17460, 24, 8, 4, 5, 8, 3,
FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
FB_VMODE_NONINTERLACED, 0 }
};
static void get_modedb(struct fb_videomode **modedb, unsigned int *size)
{
if (olpc_has_dcon()) {
*modedb = (struct fb_videomode *) olpc_dcon_modedb;
*size = ARRAY_SIZE(olpc_dcon_modedb);
} else {
*modedb = (struct fb_videomode *) geode_modedb;
*size = ARRAY_SIZE(geode_modedb);
}
}
#else
static void get_modedb(struct fb_videomode **modedb, unsigned int *size)
{
*modedb = (struct fb_videomode *) geode_modedb;
*size = ARRAY_SIZE(geode_modedb);
}
#endif
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;
else
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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 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-vp");
if (ret)
return ret;
info->fix.smem_start = pci_resource_start(dev, 0);
info->fix.smem_len = vram ? vram : 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 = pci_ioremap_bar(dev, 1);
if (par->gp_regs == NULL)
return ret;
par->dc_regs = pci_ioremap_bar(dev, 2);
if (par->dc_regs == NULL)
return ret;
par->vp_regs = pci_ioremap_bar(dev, 3);
if (par->vp_regs == NULL)
return ret;
write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000);
write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
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 *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);
if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
framebuffer_release(info);
return NULL;
}
info->var.grayscale = 0;
return info;
}
#ifdef CONFIG_PM
static int lxfb_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct fb_info *info = pci_get_drvdata(pdev);
if (state.event == PM_EVENT_SUSPEND) {
console_lock();
lx_powerdown(info);
fb_set_suspend(info, 1);
console_unlock();
}
/* there's no point in setting PCI states; we emulate PCI, so
* we don't end up getting power savings anyways */
return 0;
}
static int lxfb_resume(struct pci_dev *pdev)
{
struct fb_info *info = pci_get_drvdata(pdev);
int ret;
console_lock();
ret = lx_powerup(info);
if (ret) {
printk(KERN_ERR "lxfb: power up failed!\n");
return ret;
}
fb_set_suspend(info, 0);
console_unlock();
return 0;
}
#else
#define lxfb_suspend NULL
#define lxfb_resume NULL
#endif
static int 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;
unsigned 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 */
get_modedb(&modedb_ptr, &modedb_size);
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);
pm_set_vt_switch(vt_switch);
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->vp_regs) {
iounmap(par->vp_regs);
pci_release_region(pdev, 3);
}
if (info) {
fb_dealloc_cmap(&info->cmap);
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->vp_regs);
pci_release_region(pdev, 3);
fb_dealloc_cmap(&info->cmap);
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,
.suspend = lxfb_suspend,
.resume = lxfb_resume,
};
#ifndef MODULE
static int __init lxfb_setup(char *options)
{
char *opt;
if (!options || !*options)
return 0;
while ((opt = strsep(&options, ",")) != NULL) {
if (!*opt)
continue;
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(vram, int, 0);
MODULE_PARM_DESC(vram, "video memory size");
module_param(vt_switch, int, 0);
MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");
MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
MODULE_LICENSE("GPL");
