/*
* Permedia2 framebuffer driver.
*
* 2.5/2.6 driver:
* Copyright (c) 2003 Jim Hague (jim.hague@acm.org)
*
* based on 2.4 driver:
* Copyright (c) 1998-2000 Ilario Nardinocchi (nardinoc@CS.UniBO.IT)
* Copyright (c) 1999 Jakub Jelinek (jakub@redhat.com)
*
* and additional input from James Simmon's port of Hannu Mallat's tdfx
* driver.
*
* I have a Creative Graphics Blaster Exxtreme card - pm2fb on x86. I
* have no access to other pm2fb implementations. Sparc (and thus
* hopefully other big-endian) devices now work, thanks to a lot of
* testing work by Ron Murray. I have no access to CVision hardware,
* and therefore for now I am omitting the CVision code.
*
* Multiple boards support has been on the TODO list for ages.
* Don't expect this to change.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.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 <video/permedia2.h>
#include <video/cvisionppc.h>
#if !defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
#error "The endianness of the target host has not been defined."
#endif
#if !defined(CONFIG_PCI)
#error "Only generic PCI cards supported."
#endif
#undef PM2FB_MASTER_DEBUG
#ifdef PM2FB_MASTER_DEBUG
#define DPRINTK(a,b...) printk(KERN_DEBUG "pm2fb: %s: " a, __FUNCTION__ , ## b)
#else
#define DPRINTK(a,b...)
#endif
/*
* Driver data
*/
static char *mode __devinitdata = NULL;
/*
* The XFree GLINT driver will (I think to implement hardware cursor
* support on TVP4010 and similar where there is no RAMDAC - see
* comment in set_video) always request +ve sync regardless of what
* the mode requires. This screws me because I have a Sun
* fixed-frequency monitor which absolutely has to have -ve sync. So
* these flags allow the user to specify that requests for +ve sync
* should be silently turned in -ve sync.
*/
static int lowhsync;
static int lowvsync;
/*
* The hardware state of the graphics card that isn't part of the
* screeninfo.
*/
struct pm2fb_par
{
pm2type_t type; /* Board type */
u32 fb_size; /* framebuffer memory size */
unsigned char __iomem *v_fb; /* virtual address of frame buffer */
unsigned char __iomem *v_regs;/* virtual address of p_regs */
u32 memclock; /* memclock */
u32 video; /* video flags before blanking */
u32 mem_config; /* MemConfig reg at probe */
u32 mem_control; /* MemControl reg at probe */
u32 boot_address; /* BootAddress reg at probe */
u32 palette[16];
};
/*
* Here we define the default structs fb_fix_screeninfo and fb_var_screeninfo
* if we don't use modedb.
*/
static struct fb_fix_screeninfo pm2fb_fix __devinitdata = {
.id = "",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_PSEUDOCOLOR,
.xpanstep = 1,
.ypanstep = 1,
.ywrapstep = 0,
.accel = FB_ACCEL_NONE,
};
/*
* Default video mode. In case the modedb doesn't work.
*/
static struct fb_var_screeninfo pm2fb_var __devinitdata = {
/* "640x480, 8 bpp @ 60 Hz */
.xres = 640,
.yres = 480,
.xres_virtual = 640,
.yres_virtual = 480,
.bits_per_pixel =8,
.red = {0, 8, 0},
.blue = {0, 8, 0},
.green = {0, 8, 0},
.activate = FB_ACTIVATE_NOW,
.height = -1,
.width = -1,
.accel_flags = 0,
.pixclock = 39721,
.left_margin = 40,
.right_margin = 24,
.upper_margin = 32,
.lower_margin = 11,
.hsync_len = 96,
.vsync_len = 2,
.vmode = FB_VMODE_NONINTERLACED
};
/*
* Utility functions
*/
static inline u32 RD32(unsigned char __iomem *base, s32 off)
{
return fb_readl(base + off);
}
static inline void WR32(unsigned char __iomem *base, s32 off, u32 v)
{
fb_writel(v, base + off);
}
static inline u32 pm2_RD(struct pm2fb_par* p, s32 off)
{
return RD32(p->v_regs, off);
}
static inline void pm2_WR(struct pm2fb_par* p, s32 off, u32 v)
{
WR32(p->v_regs, off, v);
}
static inline u32 pm2_RDAC_RD(struct pm2fb_par* p, s32 idx)
{
int index = PM2R_RD_INDEXED_DATA;
switch (p->type) {
case PM2_TYPE_PERMEDIA2:
pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, idx);
break;
case PM2_TYPE_PERMEDIA2V:
pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff);
index = PM2VR_RD_INDEXED_DATA;
break;
}
mb();
return pm2_RD(p, index);
}
static inline void pm2_RDAC_WR(struct pm2fb_par* p, s32 idx, u32 v)
{
int index = PM2R_RD_INDEXED_DATA;
switch (p->type) {
case PM2_TYPE_PERMEDIA2:
pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, idx);
break;
case PM2_TYPE_PERMEDIA2V:
pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff);
index = PM2VR_RD_INDEXED_DATA;
break;
}
mb();
pm2_WR(p, index, v);
}
static inline void pm2v_RDAC_WR(struct pm2fb_par* p, s32 idx, u32 v)
{
pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff);
mb();
pm2_WR(p, PM2VR_RD_INDEXED_DATA, v);
}
#ifdef CONFIG_FB_PM2_FIFO_DISCONNECT
#define WAIT_FIFO(p,a)
#else
static inline void WAIT_FIFO(struct pm2fb_par* p, u32 a)
{
while( pm2_RD(p, PM2R_IN_FIFO_SPACE) < a );
mb();
}
#endif
/*
* partial products for the supported horizontal resolutions.
*/
#define PACKPP(p0,p1,p2) (((p2) << 6) | ((p1) << 3) | (p0))
static const struct {
u16 width;
u16 pp;
} pp_table[] = {
{ 32, PACKPP(1, 0, 0) }, { 64, PACKPP(1, 1, 0) },
{ 96, PACKPP(1, 1, 1) }, { 128, PACKPP(2, 1, 1) },
{ 160, PACKPP(2, 2, 1) }, { 192, PACKPP(2, 2, 2) },
{ 224, PACKPP(3, 2, 1) }, { 256, PACKPP(3, 2, 2) },
{ 288, PACKPP(3, 3, 1) }, { 320, PACKPP(3, 3, 2) },
{ 384, PACKPP(3, 3, 3) }, { 416, PACKPP(4, 3, 1) },
{ 448, PACKPP(4, 3, 2) }, { 512, PACKPP(4, 3, 3) },
{ 544, PACKPP(4, 4, 1) }, { 576, PACKPP(4, 4, 2) },
{ 640, PACKPP(4, 4, 3) }, { 768, PACKPP(4, 4, 4) },
{ 800, PACKPP(5, 4, 1) }, { 832, PACKPP(5, 4, 2) },
{ 896, PACKPP(5, 4, 3) }, { 1024, PACKPP(5, 4, 4) },
{ 1056, PACKPP(5, 5, 1) }, { 1088, PACKPP(5, 5, 2) },
{ 1152, PACKPP(5, 5, 3) }, { 1280, PACKPP(5, 5, 4) },
{ 1536, PACKPP(5, 5, 5) }, { 1568, PACKPP(6, 5, 1) },
{ 1600, PACKPP(6, 5, 2) }, { 1664, PACKPP(6, 5, 3) },
{ 1792, PACKPP(6, 5, 4) }, { 2048, PACKPP(6, 5, 5) },
{ 0, 0 } };
static u32 partprod(u32 xres)
{
int i;
for (i = 0; pp_table[i].width && pp_table[i].width != xres; i++)
;
if ( pp_table[i].width == 0 )
DPRINTK("invalid width %u\n", xres);
return pp_table[i].pp;
}
static u32 to3264(u32 timing, int bpp, int is64)
{
switch (bpp) {
case 8:
timing >>= 2 + is64;
break;
case 16:
timing >>= 1 + is64;
break;
case 24:
timing = (timing * 3) >> (2 + is64);
break;
case 32:
if (is64)
timing >>= 1;
break;
}
return timing;
}
static void pm2_mnp(u32 clk, unsigned char* mm, unsigned char* nn,
unsigned char* pp)
{
unsigned char m;
unsigned char n;
unsigned char p;
u32 f;
s32 curr;
s32 delta = 100000;
*mm = *nn = *pp = 0;
for (n = 2; n < 15; n++) {
for (m = 2; m; m++) {
f = PM2_REFERENCE_CLOCK * m / n;
if (f >= 150000 && f <= 300000) {
for ( p = 0; p < 5; p++, f >>= 1) {
curr = ( clk > f ) ? clk - f : f - clk;
if ( curr < delta ) {
delta=curr;
*mm=m;
*nn=n;
*pp=p;
}
}
}
}
}
}
static void pm2v_mnp(u32 clk, unsigned char* mm, unsigned char* nn,
unsigned char* pp)
{
unsigned char m;
unsigned char n;
unsigned char p;
u32 f;
s32 delta = 1000;
*mm = *nn = *pp = 0;
for (n = 1; n; n++) {
for ( m = 1; m; m++) {
for ( p = 0; p < 2; p++) {
f = PM2_REFERENCE_CLOCK * n / (m * (1 << (p + 1)));
if ( clk > f - delta && clk < f + delta ) {
delta = ( clk > f ) ? clk - f : f - clk;
*mm=m;
*nn=n;
*pp=p;
}
}
}
}
}
static void clear_palette(struct pm2fb_par* p) {
int i=256;
WAIT_FIFO(p, 1);
pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, 0);
wmb();
while (i--) {
WAIT_FIFO(p, 3);
pm2_WR(p, PM2R_RD_PALETTE_DATA, 0);
pm2_WR(p, PM2R_RD_PALETTE_DATA, 0);
pm2_WR(p, PM2R_RD_PALETTE_DATA, 0);
}
}
static void reset_card(struct pm2fb_par* p)
{
if (p->type == PM2_TYPE_PERMEDIA2V)
pm2_WR(p, PM2VR_RD_INDEX_HIGH, 0);
pm2_WR(p, PM2R_RESET_STATUS, 0);
mb();
while (pm2_RD(p, PM2R_RESET_STATUS) & PM2F_BEING_RESET)
;
mb();
#ifdef CONFIG_FB_PM2_FIFO_DISCONNECT
DPRINTK("FIFO disconnect enabled\n");
pm2_WR(p, PM2R_FIFO_DISCON, 1);
mb();
#endif
/* Restore stashed memory config information from probe */
WAIT_FIFO(p, 3);
pm2_WR(p, PM2R_MEM_CONTROL, p->mem_control);
pm2_WR(p, PM2R_BOOT_ADDRESS, p->boot_address);
wmb();
pm2_WR(p, PM2R_MEM_CONFIG, p->mem_config);
}
static void reset_config(struct pm2fb_par* p)
{
WAIT_FIFO(p, 52);
pm2_WR(p, PM2R_CHIP_CONFIG, pm2_RD(p, PM2R_CHIP_CONFIG)&
~(PM2F_VGA_ENABLE|PM2F_VGA_FIXED));
pm2_WR(p, PM2R_BYPASS_WRITE_MASK, ~(0L));
pm2_WR(p, PM2R_FRAMEBUFFER_WRITE_MASK, ~(0L));
pm2_WR(p, PM2R_FIFO_CONTROL, 0);
pm2_WR(p, PM2R_APERTURE_ONE, 0);
pm2_WR(p, PM2R_APERTURE_TWO, 0);
pm2_WR(p, PM2R_RASTERIZER_MODE, 0);
pm2_WR(p, PM2R_DELTA_MODE, PM2F_DELTA_ORDER_RGB);
pm2_WR(p, PM2R_LB_READ_FORMAT, 0);
pm2_WR(p, PM2R_LB_WRITE_FORMAT, 0);
pm2_WR(p, PM2R_LB_READ_MODE, 0);
pm2_WR(p, PM2R_LB_SOURCE_OFFSET, 0);
pm2_WR(p, PM2R_FB_SOURCE_OFFSET, 0);
pm2_WR(p, PM2R_FB_PIXEL_OFFSET, 0);
pm2_WR(p, PM2R_FB_WINDOW_BASE, 0);
pm2_WR(p, PM2R_LB_WINDOW_BASE, 0);
pm2_WR(p, PM2R_FB_SOFT_WRITE_MASK, ~(0L));
pm2_WR(p, PM2R_FB_HARD_WRITE_MASK, ~(0L));
pm2_WR(p, PM2R_FB_READ_PIXEL, 0);
pm2_WR(p, PM2R_DITHER_MODE, 0);
pm2_WR(p, PM2R_AREA_STIPPLE_MODE, 0);
pm2_WR(p, PM2R_DEPTH_MODE, 0);
pm2_WR(p, PM2R_STENCIL_MODE, 0);
pm2_WR(p, PM2R_TEXTURE_ADDRESS_MODE, 0);
pm2_WR(p, PM2R_TEXTURE_READ_MODE, 0);
pm2_WR(p, PM2R_TEXEL_LUT_MODE, 0);
pm2_WR(p, PM2R_YUV_MODE, 0);
pm2_WR(p, PM2R_COLOR_DDA_MODE, 0);
pm2_WR(p, PM2R_TEXTURE_COLOR_MODE, 0);
pm2_WR(p, PM2R_FOG_MODE, 0);
pm2_WR(p, PM2R_ALPHA_BLEND_MODE, 0);
pm2_WR(p, PM2R_LOGICAL_OP_MODE, 0);
pm2_WR(p, PM2R_STATISTICS_MODE, 0);
pm2_WR(p, PM2R_SCISSOR_MODE, 0);
pm2_WR(p, PM2R_FILTER_MODE, PM2F_SYNCHRONIZATION);
switch (p->type) {
case PM2_TYPE_PERMEDIA2:
pm2_RDAC_WR(p, PM2I_RD_MODE_CONTROL, 0); /* no overlay */
pm2_RDAC_WR(p, PM2I_RD_CURSOR_CONTROL, 0);
pm2_RDAC_WR(p, PM2I_RD_MISC_CONTROL, PM2F_RD_PALETTE_WIDTH_8);
break;
case PM2_TYPE_PERMEDIA2V:
pm2v_RDAC_WR(p, PM2VI_RD_MISC_CONTROL, 1); /* 8bit */
break;
}
pm2_RDAC_WR(p, PM2I_RD_COLOR_KEY_CONTROL, 0);
pm2_RDAC_WR(p, PM2I_RD_OVERLAY_KEY, 0);
pm2_RDAC_WR(p, PM2I_RD_RED_KEY, 0);
pm2_RDAC_WR(p, PM2I_RD_GREEN_KEY, 0);
pm2_RDAC_WR(p, PM2I_RD_BLUE_KEY, 0);
}
static void set_aperture(struct pm2fb_par* p, u32 depth)
{
/*
* The hardware is little-endian. When used in big-endian
* hosts, the on-chip aperture settings are used where
* possible to translate from host to card byte order.
*/
WAIT_FIFO(p, 4);
#ifdef __LITTLE_ENDIAN
pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_STANDARD);
#else
switch (depth) {
case 24: /* RGB->BGR */
/*
* We can't use the aperture to translate host to
* card byte order here, so we switch to BGR mode
* in pm2fb_set_par().
*/
case 8: /* B->B */
pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_STANDARD);
break;
case 16: /* HL->LH */
pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_HALFWORDSWAP);
break;
case 32: /* RGBA->ABGR */
pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_BYTESWAP);
break;
}
#endif
// We don't use aperture two, so this may be superflous
pm2_WR(p, PM2R_APERTURE_TWO, PM2F_APERTURE_STANDARD);
}
static void set_color(struct pm2fb_par* p, unsigned char regno,
unsigned char r, unsigned char g, unsigned char b)
{
WAIT_FIFO(p, 4);
pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, regno);
wmb();
pm2_WR(p, PM2R_RD_PALETTE_DATA, r);
wmb();
pm2_WR(p, PM2R_RD_PALETTE_DATA, g);
wmb();
pm2_WR(p, PM2R_RD_PALETTE_DATA, b);
}
static void set_memclock(struct pm2fb_par* par, u32 clk)
{
int i;
unsigned char m, n, p;
pm2_mnp(clk, &m, &n, &p);
WAIT_FIFO(par, 10);
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 6);
wmb();
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_1, m);
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_2, n);
wmb();
pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 8|p);
wmb();
pm2_RDAC_RD(par, PM2I_RD_MEMORY_CLOCK_STATUS);
rmb();
for (i = 256;
i && !(pm2_RD(par, PM2R_RD_INDEXED_DATA) & PM2F_PLL_LOCKED);
i--)
;
}
static void set_pixclock(struct pm2fb_par* par, u32 clk)
{
int i;
unsigned char m, n, p;
switch (par->type) {
case PM2_TYPE_PERMEDIA2:
pm2_mnp(clk, &m, &n, &p);
WAIT_FIFO(par, 8);
pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 0);
wmb();
pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A1, m);
pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A2, n);
wmb();
pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 8|p);
wmb();
pm2_RDAC_RD(par, PM2I_RD_PIXEL_CLOCK_STATUS);
rmb();
for (i = 256;
i && !(pm2_RD(par, PM2R_RD_INDEXED_DATA) & PM2F_PLL_LOCKED);
i--)
;
break;
case PM2_TYPE_PERMEDIA2V:
pm2v_mnp(clk/2, &m, &n, &p);
WAIT_FIFO(par, 8);
pm2_WR(par, PM2VR_RD_INDEX_HIGH, PM2VI_RD_CLK0_PRESCALE >> 8);
pm2v_RDAC_WR(par, PM2VI_RD_CLK0_PRESCALE, m);
pm2v_RDAC_WR(par, PM2VI_RD_CLK0_FEEDBACK, n);
pm2v_RDAC_WR(par, PM2VI_RD_CLK0_POSTSCALE, p);
pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
break;
}
}
static void set_video(struct pm2fb_par* p, u32 video) {
u32 tmp;
u32 vsync;
vsync = video;
DPRINTK("video = 0x%x\n", video);
/*
* The hardware cursor needs +vsync to recognise vert retrace.
* We may not be using the hardware cursor, but the X Glint
* driver may well. So always set +hsync/+vsync and then set
* the RAMDAC to invert the sync if necessary.
*/
vsync &= ~(PM2F_HSYNC_MASK|PM2F_VSYNC_MASK);
vsync |= PM2F_HSYNC_ACT_HIGH|PM2F_VSYNC_ACT_HIGH;
WAIT_FIFO(p, 5);
pm2_WR(p, PM2R_VIDEO_CONTROL, vsync);
switch (p->type) {
case PM2_TYPE_PERMEDIA2:
tmp = PM2F_RD_PALETTE_WIDTH_8;
if ((video & PM2F_HSYNC_MASK) == PM2F_HSYNC_ACT_LOW)
tmp |= 4; /* invert hsync */
if ((video & PM2F_VSYNC_MASK) == PM2F_VSYNC_ACT_LOW)
tmp |= 8; /* invert vsync */
pm2_RDAC_WR(p, PM2I_RD_MISC_CONTROL, tmp);
break;
case PM2_TYPE_PERMEDIA2V:
tmp = 0;
if ((video & PM2F_HSYNC_MASK) == PM2F_HSYNC_ACT_LOW)
tmp |= 1; /* invert hsync */
if ((video & PM2F_VSYNC_MASK) == PM2F_VSYNC_ACT_LOW)
tmp |= 4; /* invert vsync */
pm2v_RDAC_WR(p, PM2VI_RD_SYNC_CONTROL, tmp);
pm2v_RDAC_WR(p, PM2VI_RD_MISC_CONTROL, 1);
break;
}
}
/*
*
*/
/**
* pm2fb_check_var - Optional function. Validates a var passed in.
* @var: frame buffer variable screen structure
* @info: frame buffer structure that represents a single frame buffer
*
* Checks to see if the hardware supports the state requested by
* var passed in.
*
* Returns negative errno on error, or zero on success.
*/
static int pm2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
u32 lpitch;
if (var->bits_per_pixel != 8 && var->bits_per_pixel != 16 &&
var->bits_per_pixel != 24 && var->bits_per_pixel != 32) {
DPRINTK("depth not supported: %u\n", var->bits_per_pixel);
return -EINVAL;
}
if (var->xres != var->xres_virtual) {
DPRINTK("virtual x resolution != physical x resolution not supported\n");
return -EINVAL;
}
if (var->yres > var->yres_virtual) {
DPRINTK("virtual y resolution < physical y resolution not possible\n");
return -EINVAL;
}
if (var->xoffset) {
DPRINTK("xoffset not supported\n");
return -EINVAL;
}
if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
DPRINTK("interlace not supported\n");
return -EINVAL;
}
var->xres = (var->xres + 15) & ~15; /* could sometimes be 8 */
lpitch = var->xres * ((var->bits_per_pixel + 7)>>3);
if (var->xres < 320 || var->xres > 1600) {
DPRINTK("width not supported: %u\n", var->xres);
return -EINVAL;
}
if (var->yres < 200 || var->yres > 1200) {
DPRINTK("height not supported: %u\n", var->yres);
return -EINVAL;
}
if (lpitch * var->yres_virtual > info->fix.smem_len) {
DPRINTK("no memory for screen (%ux%ux%u)\n",
var->xres, var->yres_virtual, var->bits_per_pixel);
return -EINVAL;
}
if (PICOS2KHZ(var->pixclock) > PM2_MAX_PIXCLOCK) {
DPRINTK("pixclock too high (%ldKHz)\n", PICOS2KHZ(var->pixclock));
return -EINVAL;
}
switch(var->bits_per_pixel) {
case 8:
var->red.length = var->green.length = var->blue.length = 8;
break;
case 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;
break;
case 32:
var->transp.offset = 24;
var->transp.length = 8;
var->red.offset = 16;
var->green.offset = 8;
var->blue.offset = 0;
var->red.length = var->green.length = var->blue.length = 8;
break;
case 24:
#ifdef __BIG_ENDIAN
var->red.offset = 0;
var->blue.offset = 16;
#else
var->red.offset = 16;
var->blue.offset = 0;
#endif
var->green.offset = 8;
var->red.length = var->green.length = var->blue.length = 8;
break;
}
var->height = var->width = -1;
var->accel_flags = 0; /* Can't mmap if this is on */
DPRINTK("Checking graphics mode at %dx%d depth %d\n",
var->xres, var->yres, var->bits_per_pixel);
return 0;
}
/**
* pm2fb_set_par - Alters the hardware state.
* @info: frame buffer structure that represents a single frame buffer
*
* Using the fb_var_screeninfo in fb_info we set the resolution of the
* this particular framebuffer.
*/
static int pm2fb_set_par(struct fb_info *info)
{
struct pm2fb_par *par = info->par;
u32 pixclock;
u32 width, height, depth;
u32 hsstart, hsend, hbend, htotal;
u32 vsstart, vsend, vbend, vtotal;
u32 stride;
u32 base;
u32 video = 0;
u32 clrmode = PM2F_RD_COLOR_MODE_RGB | PM2F_RD_GUI_ACTIVE;
u32 txtmap = 0;
u32 pixsize = 0;
u32 clrformat = 0;
u32 xres;
int data64;
reset_card(par);
reset_config(par);
clear_palette(par);
if ( par->memclock )
set_memclock(par, par->memclock);
width = (info->var.xres_virtual + 7) & ~7;
height = info->var.yres_virtual;
depth = (info->var.bits_per_pixel + 7) & ~7;
depth = (depth > 32) ? 32 : depth;
data64 = depth > 8 || par->type == PM2_TYPE_PERMEDIA2V;
xres = (info->var.xres + 31) & ~31;
pixclock = PICOS2KHZ(info->var.pixclock);
if (pixclock > PM2_MAX_PIXCLOCK) {
DPRINTK("pixclock too high (%uKHz)\n", pixclock);
return -EINVAL;
}
hsstart = to3264(info->var.right_margin, depth, data64);
hsend = hsstart + to3264(info->var.hsync_len, depth, data64);
hbend = hsend + to3264(info->var.left_margin, depth, data64);
htotal = to3264(xres, depth, data64) + hbend - 1;
vsstart = (info->var.lower_margin)
? info->var.lower_margin - 1
: 0; /* FIXME! */
vsend = info->var.lower_margin + info->var.vsync_len - 1;
vbend = info->var.lower_margin + info->var.vsync_len + info->var.upper_margin;
vtotal = info->var.yres + vbend - 1;
stride = to3264(width, depth, 1);
base = to3264(info->var.yoffset * xres + info->var.xoffset, depth, 1);
if (data64)
video |= PM2F_DATA_64_ENABLE;
if (info->var.sync & FB_SYNC_HOR_HIGH_ACT) {
if (lowhsync) {
DPRINTK("ignoring +hsync, using -hsync.\n");
video |= PM2F_HSYNC_ACT_LOW;
} else
video |= PM2F_HSYNC_ACT_HIGH;
}
else
video |= PM2F_HSYNC_ACT_LOW;
if (info->var.sync & FB_SYNC_VERT_HIGH_ACT) {
if (lowvsync) {
DPRINTK("ignoring +vsync, using -vsync.\n");
video |= PM2F_VSYNC_ACT_LOW;
} else
video |= PM2F_VSYNC_ACT_HIGH;
}
else
video |= PM2F_VSYNC_ACT_LOW;
if ((info->var.vmode & FB_VMODE_MASK)==FB_VMODE_INTERLACED) {
DPRINTK("interlaced not supported\n");
return -EINVAL;
}
if ((info->var.vmode & FB_VMODE_MASK)==FB_VMODE_DOUBLE)
video |= PM2F_LINE_DOUBLE;
if ((info->var.activate & FB_ACTIVATE_MASK)==FB_ACTIVATE_NOW)
video |= PM2F_VIDEO_ENABLE;
par->video = video;
info->fix.visual =
(depth == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
info->fix.line_length = info->var.xres * depth / 8;
info->cmap.len = 256;
/*
* Settings calculated. Now write them out.
*/
if (par->type == PM2_TYPE_PERMEDIA2V) {
WAIT_FIFO(par, 1);
pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
}
set_aperture(par, depth);
mb();
WAIT_FIFO(par, 19);
pm2_RDAC_WR(par, PM2I_RD_COLOR_KEY_CONTROL,
( depth == 8 ) ? 0 : PM2F_COLOR_KEY_TEST_OFF);
switch (depth) {
case 8:
pm2_WR(par, PM2R_FB_READ_PIXEL, 0);
clrformat = 0x0e;
break;
case 16:
pm2_WR(par, PM2R_FB_READ_PIXEL, 1);
clrmode |= PM2F_RD_TRUECOLOR | PM2F_RD_PIXELFORMAT_RGB565;
txtmap = PM2F_TEXTEL_SIZE_16;
pixsize = 1;
clrformat = 0x70;
break;
case 32:
pm2_WR(par, PM2R_FB_READ_PIXEL, 2);
clrmode |= PM2F_RD_TRUECOLOR | PM2F_RD_PIXELFORMAT_RGBA8888;
txtmap = PM2F_TEXTEL_SIZE_32;
pixsize = 2;
clrformat = 0x20;
break;
case 24:
pm2_WR(par, PM2R_FB_READ_PIXEL, 4);
clrmode |= PM2F_RD_TRUECOLOR | PM2F_RD_PIXELFORMAT_RGB888;
txtmap = PM2F_TEXTEL_SIZE_24;
pixsize = 4;
clrformat = 0x20;
break;
}
pm2_WR(par, PM2R_FB_WRITE_MODE, PM2F_FB_WRITE_ENABLE);
pm2_WR(par, PM2R_FB_READ_MODE, partprod(xres));
pm2_WR(par, PM2R_LB_READ_MODE, partprod(xres));
pm2_WR(par, PM2R_TEXTURE_MAP_FORMAT, txtmap | partprod(xres));
pm2_WR(par, PM2R_H_TOTAL, htotal);
pm2_WR(par, PM2R_HS_START, hsstart);
pm2_WR(par, PM2R_HS_END, hsend);
pm2_WR(par, PM2R_HG_END, hbend);
pm2_WR(par, PM2R_HB_END, hbend);
pm2_WR(par, PM2R_V_TOTAL, vtotal);
pm2_WR(par, PM2R_VS_START, vsstart);
pm2_WR(par, PM2R_VS_END, vsend);
pm2_WR(par, PM2R_VB_END, vbend);
pm2_WR(par, PM2R_SCREEN_STRIDE, stride);
wmb();
pm2_WR(par, PM2R_WINDOW_ORIGIN, 0);
pm2_WR(par, PM2R_SCREEN_SIZE, (height << 16) | width);
pm2_WR(par, PM2R_SCISSOR_MODE, PM2F_SCREEN_SCISSOR_ENABLE);
wmb();
pm2_WR(par, PM2R_SCREEN_BASE, base);
wmb();
set_video(par, video);
WAIT_FIFO(par, 4);
switch (par->type) {
case PM2_TYPE_PERMEDIA2:
pm2_RDAC_WR(par, PM2I_RD_COLOR_MODE, clrmode);
break;
case PM2_TYPE_PERMEDIA2V:
pm2v_RDAC_WR(par, PM2VI_RD_PIXEL_SIZE, pixsize);
pm2v_RDAC_WR(par, PM2VI_RD_COLOR_FORMAT, clrformat);
break;
}
set_pixclock(par, pixclock);
DPRINTK("Setting graphics mode at %dx%d depth %d\n",
info->var.xres, info->var.yres, info->var.bits_per_pixel);
return 0;
}
/**
* pm2fb_setcolreg - Sets a color register.
* @regno: boolean, 0 copy local, 1 get_user() function
* @red: frame buffer colormap structure
* @green: The green value which can be up to 16 bits wide
* @blue: The blue value which can be up to 16 bits wide.
* @transp: If supported the alpha value which can be up to 16 bits wide.
* @info: frame buffer info structure
*
* Set a single color register. The values supplied have a 16 bit
* magnitude which needs to be scaled in this function for the hardware.
* Pretty much a direct lift from tdfxfb.c.
*
* Returns negative errno on error, or zero on success.
*/
static int pm2fb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
struct pm2fb_par *par = info->par;
if (regno >= info->cmap.len) /* no. of hw registers */
return 1;
/*
* Program hardware... do anything you want with transp
*/
/* grayscale works only partially under directcolor */
if (info->var.grayscale) {
/* grayscale = 0.30*R + 0.59*G + 0.11*B */
red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
}
/* Directcolor:
* var->{color}.offset contains start of bitfield
* var->{color}.length contains length of bitfield
* {hardwarespecific} contains width of DAC
* cmap[X] is programmed to
* (X << red.offset) | (X << green.offset) | (X << blue.offset)
* RAMDAC[X] is programmed to (red, green, blue)
*
* Pseudocolor:
* uses offset = 0 && length = DAC register width.
* var->{color}.offset is 0
* var->{color}.length contains widht of DAC
* cmap is not used
* DAC[X] is programmed to (red, green, blue)
* Truecolor:
* does not use RAMDAC (usually has 3 of them).
* var->{color}.offset contains start of bitfield
* var->{color}.length contains length of bitfield
* cmap is programmed to
* (red << red.offset) | (green << green.offset) |
* (blue << blue.offset) | (transp << transp.offset)
* RAMDAC does not exist
*/
#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
switch (info->fix.visual) {
case FB_VISUAL_TRUECOLOR:
case FB_VISUAL_PSEUDOCOLOR:
red = CNVT_TOHW(red, info->var.red.length);
green = CNVT_TOHW(green, info->var.green.length);
blue = CNVT_TOHW(blue, info->var.blue.length);
transp = CNVT_TOHW(transp, info->var.transp.length);
break;
case FB_VISUAL_DIRECTCOLOR:
/* example here assumes 8 bit DAC. Might be different
* for your hardware */
red = CNVT_TOHW(red, 8);
green = CNVT_TOHW(green, 8);
blue = CNVT_TOHW(blue, 8);
/* hey, there is bug in transp handling... */
transp = CNVT_TOHW(transp, 8);
break;
}
#undef CNVT_TOHW
/* Truecolor has hardware independent palette */
if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
u32 v;
if (regno >= 16)
return 1;
v = (red << info->var.red.offset) |
(green << info->var.green.offset) |
(blue << info->var.blue.offset) |
(transp << info->var.transp.offset);
switch (info->var.bits_per_pixel) {
case 8:
break;
case 16:
case 24:
case 32:
par->palette[regno] = v;
break;
}
return 0;
}
else if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR)
set_color(par, regno, red, green, blue);
return 0;
}
/**
* pm2fb_pan_display - Pans the display.
* @var: frame buffer variable screen structure
* @info: frame buffer structure that represents a single frame buffer
*
* Pan (or wrap, depending on the `vmode' field) the display using the
* `xoffset' and `yoffset' fields of the `var' structure.
* If the values don't fit, return -EINVAL.
*
* Returns negative errno on error, or zero on success.
*
*/
static int pm2fb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct pm2fb_par *p = info->par;
u32 base;
u32 depth;
u32 xres;
xres = (var->xres + 31) & ~31;
depth = (var->bits_per_pixel + 7) & ~7;
depth = (depth > 32) ? 32 : depth;
base = to3264(var->yoffset * xres + var->xoffset, depth, 1);
WAIT_FIFO(p, 1);
pm2_WR(p, PM2R_SCREEN_BASE, base);
return 0;
}
/**
* pm2fb_blank - Blanks the display.
* @blank_mode: the blank mode we want.
* @info: frame buffer structure that represents a single frame buffer
*
* Blank the screen if blank_mode != 0, else unblank. Return 0 if
* blanking succeeded, != 0 if un-/blanking failed due to e.g. a
* video mode which doesn't support it. Implements VESA suspend
* and powerdown modes on hardware that supports disabling hsync/vsync:
* blank_mode == 2: suspend vsync
* blank_mode == 3: suspend hsync
* blank_mode == 4: powerdown
*
* Returns negative errno on error, or zero on success.
*
*/
static int pm2fb_blank(int blank_mode, struct fb_info *info)
{
struct pm2fb_par *par = info->par;
u32 video = par->video;
DPRINTK("blank_mode %d\n", blank_mode);
switch (blank_mode) {
case FB_BLANK_UNBLANK:
/* Screen: On */
video |= PM2F_VIDEO_ENABLE;
break;
case FB_BLANK_NORMAL:
/* Screen: Off */
video &= ~PM2F_VIDEO_ENABLE;
break;
case FB_BLANK_VSYNC_SUSPEND:
/* VSync: Off */
video &= ~(PM2F_VSYNC_MASK | PM2F_BLANK_LOW );
break;
case FB_BLANK_HSYNC_SUSPEND:
/* HSync: Off */
video &= ~(PM2F_HSYNC_MASK | PM2F_BLANK_LOW );
break;
case FB_BLANK_POWERDOWN:
/* HSync: Off, VSync: Off */
video &= ~(PM2F_VSYNC_MASK | PM2F_HSYNC_MASK| PM2F_BLANK_LOW);
break;
}
set_video(par, video);
return 0;
}
/* ------------ Hardware Independent Functions ------------ */
/*
* Frame buffer operations
*/
static struct fb_ops pm2fb_ops = {
.owner = THIS_MODULE,
.fb_check_var = pm2fb_check_var,
.fb_set_par = pm2fb_set_par,
.fb_setcolreg = pm2fb_setcolreg,
.fb_blank = pm2fb_blank,
.fb_pan_display = pm2fb_pan_display,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
/*
* PCI stuff
*/
/**
* Device initialisation
*
* Initialise and allocate resource for PCI device.
*
* @param pdev PCI device.
* @param id PCI device ID.
*/
static int __devinit pm2fb_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct pm2fb_par *default_par;
struct fb_info *info;
int err, err_retval = -ENXIO;
err = pci_enable_device(pdev);
if ( err ) {
printk(KERN_WARNING "pm2fb: Can't enable pdev: %d\n", err);
return err;
}
info = framebuffer_alloc(sizeof(struct pm2fb_par), &pdev->dev);
if ( !info )
return -ENOMEM;
default_par = info->par;
switch (pdev->device) {
case PCI_DEVICE_ID_TI_TVP4020:
strcpy(pm2fb_fix.id, "TVP4020");
default_par->type = PM2_TYPE_PERMEDIA2;
break;
case PCI_DEVICE_ID_3DLABS_PERMEDIA2:
strcpy(pm2fb_fix.id, "Permedia2");
default_par->type = PM2_TYPE_PERMEDIA2;
break;
case PCI_DEVICE_ID_3DLABS_PERMEDIA2V:
strcpy(pm2fb_fix.id, "Permedia2v");
default_par->type = PM2_TYPE_PERMEDIA2V;
break;
}
pm2fb_fix.mmio_start = pci_resource_start(pdev, 0);
pm2fb_fix.mmio_len = PM2_REGS_SIZE;
#if defined(__BIG_ENDIAN)
/*
* PM2 has a 64k register file, mapped twice in 128k. Lower
* map is little-endian, upper map is big-endian.
*/
pm2fb_fix.mmio_start += PM2_REGS_SIZE;
DPRINTK("Adjusting register base for big-endian.\n");
#endif
DPRINTK("Register base at 0x%lx\n", pm2fb_fix.mmio_start);
/* Registers - request region and map it. */
if ( !request_mem_region(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len,
"pm2fb regbase") ) {
printk(KERN_WARNING "pm2fb: Can't reserve regbase.\n");
goto err_exit_neither;
}
default_par->v_regs =
ioremap_nocache(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len);
if ( !default_par->v_regs ) {
printk(KERN_WARNING "pm2fb: Can't remap %s register area.\n",
pm2fb_fix.id);
release_mem_region(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len);
goto err_exit_neither;
}
/* Stash away memory register info for use when we reset the board */
default_par->mem_control = pm2_RD(default_par, PM2R_MEM_CONTROL);
default_par->boot_address = pm2_RD(default_par, PM2R_BOOT_ADDRESS);
default_par->mem_config = pm2_RD(default_par, PM2R_MEM_CONFIG);
DPRINTK("MemControl 0x%x BootAddress 0x%x MemConfig 0x%x\n",
default_par->mem_control, default_par->boot_address,
default_par->mem_config);
if(default_par->mem_control == 0 &&
default_par->boot_address == 0x31 &&
default_par->mem_config == 0x259fffff &&
pdev->subsystem_vendor == 0x1048 &&
pdev->subsystem_device == 0x0a31) {
DPRINTK("subsystem_vendor: %04x, subsystem_device: %04x\n",
pdev->subsystem_vendor, pdev->subsystem_device);
DPRINTK("We have not been initialized by VGA BIOS "
"and are running on an Elsa Winner 2000 Office\n");
DPRINTK("Initializing card timings manually...\n");
default_par->mem_control=0;
default_par->boot_address=0x20;
default_par->mem_config=0xe6002021;
default_par->memclock=100000;
}
/* Now work out how big lfb is going to be. */
switch(default_par->mem_config & PM2F_MEM_CONFIG_RAM_MASK) {
case PM2F_MEM_BANKS_1:
default_par->fb_size=0x200000;
break;
case PM2F_MEM_BANKS_2:
default_par->fb_size=0x400000;
break;
case PM2F_MEM_BANKS_3:
default_par->fb_size=0x600000;
break;
case PM2F_MEM_BANKS_4:
default_par->fb_size=0x800000;
break;
}
default_par->memclock = CVPPC_MEMCLOCK;
pm2fb_fix.smem_start = pci_resource_start(pdev, 1);
pm2fb_fix.smem_len = default_par->fb_size;
/* Linear frame buffer - request region and map it. */
if ( !request_mem_region(pm2fb_fix.smem_start, pm2fb_fix.smem_len,
"pm2fb smem") ) {
printk(KERN_WARNING "pm2fb: Can't reserve smem.\n");
goto err_exit_mmio;
}
info->screen_base = default_par->v_fb =
ioremap_nocache(pm2fb_fix.smem_start, pm2fb_fix.smem_len);
if ( !default_par->v_fb ) {
printk(KERN_WARNING "pm2fb: Can't ioremap smem area.\n");
release_mem_region(pm2fb_fix.smem_start, pm2fb_fix.smem_len);
goto err_exit_mmio;
}
info->fbops = &pm2fb_ops;
info->fix = pm2fb_fix;
info->pseudo_palette = default_par->palette;
info->flags = FBINFO_DEFAULT |
FBINFO_HWACCEL_YPAN;
if (!mode)
mode = "640x480@60";
err = fb_find_mode(&info->var, info, mode, NULL, 0, NULL, 8);
if (!err || err == 4)
info->var = pm2fb_var;
if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
goto err_exit_all;
if (register_framebuffer(info) < 0)
goto err_exit_both;
printk(KERN_INFO "fb%d: %s frame buffer device, memory = %dK.\n",
info->node, info->fix.id, default_par->fb_size / 1024);
/*
* Our driver data
*/
pci_set_drvdata(pdev, info);
return 0;
err_exit_all:
fb_dealloc_cmap(&info->cmap);
err_exit_both:
iounmap(info->screen_base);
release_mem_region(pm2fb_fix.smem_start, pm2fb_fix.smem_len);
err_exit_mmio:
iounmap(default_par->v_regs);
release_mem_region(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len);
err_exit_neither:
framebuffer_release(info);
return err_retval;
}
/**
* Device removal.
*
* Release all device resources.
*
* @param pdev PCI device to clean up.
*/
static void __devexit pm2fb_remove(struct pci_dev *pdev)
{
struct fb_info* info = pci_get_drvdata(pdev);
struct fb_fix_screeninfo* fix = &info->fix;
struct pm2fb_par *par = info->par;
unregister_framebuffer(info);
iounmap(info->screen_base);
release_mem_region(fix->smem_start, fix->smem_len);
iounmap(par->v_regs);
release_mem_region(fix->mmio_start, fix->mmio_len);
pci_set_drvdata(pdev, NULL);
kfree(info);
}
static struct pci_device_id pm2fb_id_table[] = {
{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TVP4020,
PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
0xff0000, 0 },
{ PCI_VENDOR_ID_3DLABS, PCI_DEVICE_ID_3DLABS_PERMEDIA2,
PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
0xff0000, 0 },
{ PCI_VENDOR_ID_3DLABS, PCI_DEVICE_ID_3DLABS_PERMEDIA2V,
PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
0xff0000, 0 },
{ 0, }
};
static struct pci_driver pm2fb_driver = {
.name = "pm2fb",
.id_table = pm2fb_id_table,
.probe = pm2fb_probe,
.remove = __devexit_p(pm2fb_remove),
};
MODULE_DEVICE_TABLE(pci, pm2fb_id_table);
#ifndef MODULE
/**
* Parse user speficied options.
*
* This is, comma-separated options following `video=pm2fb:'.
*/
static int __init pm2fb_setup(char *options)
{
char* this_opt;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!*this_opt)
continue;
if(!strcmp(this_opt, "lowhsync")) {
lowhsync = 1;
} else if(!strcmp(this_opt, "lowvsync")) {
lowvsync = 1;
} else {
mode = this_opt;
}
}
return 0;
}
#endif
static int __init pm2fb_init(void)
{
#ifndef MODULE
char *option = NULL;
if (fb_get_options("pm2fb", &option))
return -ENODEV;
pm2fb_setup(option);
#endif
return pci_register_driver(&pm2fb_driver);
}
module_init(pm2fb_init);
#ifdef MODULE
/*
* Cleanup
*/
static void __exit pm2fb_exit(void)
{
pci_unregister_driver(&pm2fb_driver);
}
#endif
#ifdef MODULE
module_exit(pm2fb_exit);
module_param(mode, charp, 0);
MODULE_PARM_DESC(mode, "Preferred video mode e.g. '648x480-8@60'");
module_param(lowhsync, bool, 0);
MODULE_PARM_DESC(lowhsync, "Force horizontal sync low regardless of mode");
module_param(lowvsync, bool, 0);
MODULE_PARM_DESC(lowvsync, "Force vertical sync low regardless of mode");
MODULE_AUTHOR("Jim Hague <jim.hague@acm.org>");
MODULE_DESCRIPTION("Permedia2 framebuffer device driver");
MODULE_LICENSE("GPL");
#endif
