Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-13 23:51:39 +00:00
Code Issues Packages Projects Releases Wiki Activity
936a3f770b
linux/drivers/video/pvr2fb.c
Paul Mundt 7bdda6209f sh: Fix up more 64-bit pgprot truncation on SH-X2 TLB. 
Both the store queue API and the PMB remapping take unsigned long for
their pgprot flags, which cuts off the extended protection bits. In the
case of the PMB this isn't really a problem since the cache attribute
bits that we care about are all in the lower 32-bits, but we do it just
to be safe. The store queue remapping on the other hand depends on the
extended prot bits for enabling userspace access to the mappings.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-02-17 13:23:00 +09:00

1142 lines
31 KiB
C
Raw Blame History

/*
* drivers/video/pvr2fb.c
*
* Frame buffer and fbcon support for the NEC PowerVR2 found within the Sega
* Dreamcast.
*
* Copyright (c) 2001 M. R. Brown <mrbrown@0xd6.org>
* Copyright (c) 2001 - 2008 Paul Mundt <lethal@linux-sh.org>
*
* This driver is mostly based on the excellent amifb and vfb sources. It uses
* an odd scheme for converting hardware values to/from framebuffer values,
* here are some hacked-up formulas:
*
* The Dreamcast has screen offsets from each side of its four borders and
* the start offsets of the display window. I used these values to calculate
* 'pseudo' values (think of them as placeholders) for the fb video mode, so
* that when it came time to convert these values back into their hardware
* values, I could just add mode- specific offsets to get the correct mode
* settings:
*
* left_margin = diwstart_h - borderstart_h;
* right_margin = borderstop_h - (diwstart_h + xres);
* upper_margin = diwstart_v - borderstart_v;
* lower_margin = borderstop_v - (diwstart_h + yres);
*
* hsync_len = borderstart_h + (hsync_total - borderstop_h);
* vsync_len = borderstart_v + (vsync_total - borderstop_v);
*
* Then, when it's time to convert back to hardware settings, the only
* constants are the borderstart_* offsets, all other values are derived from
* the fb video mode:
*
* // PAL
* borderstart_h = 116;
* borderstart_v = 44;
* ...
* borderstop_h = borderstart_h + hsync_total - hsync_len;
* ...
* diwstart_v = borderstart_v - upper_margin;
*
* However, in the current implementation, the borderstart values haven't had
* the benefit of being fully researched, so some modes may be broken.
*/
#undef DEBUG
#include <linux/module.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/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#ifdef CONFIG_SH_DREAMCAST
#include <asm/machvec.h>
#include <mach-dreamcast/mach/sysasic.h>
#endif
#ifdef CONFIG_PVR2_DMA
#include <linux/pagemap.h>
#include <mach/dma.h>
#include <asm/dma.h>
#endif
#ifdef CONFIG_SH_STORE_QUEUES
#include <linux/uaccess.h>
#include <cpu/sq.h>
#endif
#ifndef PCI_DEVICE_ID_NEC_NEON250
# define PCI_DEVICE_ID_NEC_NEON250 0x0067
#endif
/* 2D video registers */
#define DISP_BASE par->mmio_base
#define DISP_BRDRCOLR (DISP_BASE + 0x40)
#define DISP_DIWMODE (DISP_BASE + 0x44)
#define DISP_DIWADDRL (DISP_BASE + 0x50)
#define DISP_DIWADDRS (DISP_BASE + 0x54)
#define DISP_DIWSIZE (DISP_BASE + 0x5c)
#define DISP_SYNCCONF (DISP_BASE + 0xd0)
#define DISP_BRDRHORZ (DISP_BASE + 0xd4)
#define DISP_SYNCSIZE (DISP_BASE + 0xd8)
#define DISP_BRDRVERT (DISP_BASE + 0xdc)
#define DISP_DIWCONF (DISP_BASE + 0xe8)
#define DISP_DIWHSTRT (DISP_BASE + 0xec)
#define DISP_DIWVSTRT (DISP_BASE + 0xf0)
#define DISP_PIXDEPTH (DISP_BASE + 0x108)
/* Pixel clocks, one for TV output, doubled for VGA output */
#define TV_CLK 74239
#define VGA_CLK 37119
/* This is for 60Hz - the VTOTAL is doubled for interlaced modes */
#define PAL_HTOTAL 863
#define PAL_VTOTAL 312
#define NTSC_HTOTAL 857
#define NTSC_VTOTAL 262
/* Supported cable types */
enum { CT_VGA, CT_NONE, CT_RGB, CT_COMPOSITE };
/* Supported video output types */
enum { VO_PAL, VO_NTSC, VO_VGA };
/* Supported palette types */
enum { PAL_ARGB1555, PAL_RGB565, PAL_ARGB4444, PAL_ARGB8888 };
struct pvr2_params { unsigned int val; char *name; };
static struct pvr2_params cables[] __devinitdata = {
{ CT_VGA, "VGA" }, { CT_RGB, "RGB" }, { CT_COMPOSITE, "COMPOSITE" },
};
static struct pvr2_params outputs[] __devinitdata = {
{ VO_PAL, "PAL" }, { VO_NTSC, "NTSC" }, { VO_VGA, "VGA" },
};
/*
* This describes the current video mode
*/
static struct pvr2fb_par {
unsigned int hsync_total; /* Clocks/line */
unsigned int vsync_total; /* Lines/field */
unsigned int borderstart_h;
unsigned int borderstop_h;
unsigned int borderstart_v;
unsigned int borderstop_v;
unsigned int diwstart_h; /* Horizontal offset of the display field */
unsigned int diwstart_v; /* Vertical offset of the display field, for
interlaced modes, this is the long field */
unsigned long disp_start; /* Address of image within VRAM */
unsigned char is_interlaced; /* Is the display interlaced? */
unsigned char is_doublescan; /* Are scanlines output twice? (doublescan) */
unsigned char is_lowres; /* Is horizontal pixel-doubling enabled? */
unsigned long mmio_base; /* MMIO base */
u32 palette[16];
} *currentpar;
static struct fb_info *fb_info;
static struct fb_fix_screeninfo pvr2_fix __devinitdata = {
.id = "NEC PowerVR2",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.ypanstep = 1,
.ywrapstep = 1,
.accel = FB_ACCEL_NONE,
};
static struct fb_var_screeninfo pvr2_var __devinitdata = {
.xres = 640,
.yres = 480,
.xres_virtual = 640,
.yres_virtual = 480,
.bits_per_pixel =16,
.red = { 11, 5, 0 },
.green = { 5, 6, 0 },
.blue = { 0, 5, 0 },
.activate = FB_ACTIVATE_NOW,
.height = -1,
.width = -1,
.vmode = FB_VMODE_NONINTERLACED,
};
static int cable_type = CT_VGA;
static int video_output = VO_VGA;
static int nopan = 0;
static int nowrap = 1;
/*
* We do all updating, blanking, etc. during the vertical retrace period
*/
static unsigned int do_vmode_full = 0; /* Change the video mode */
static unsigned int do_vmode_pan = 0; /* Update the video mode */
static short do_blank = 0; /* (Un)Blank the screen */
static unsigned int is_blanked = 0; /* Is the screen blanked? */
#ifdef CONFIG_SH_STORE_QUEUES
static unsigned long pvr2fb_map;
#endif
#ifdef CONFIG_PVR2_DMA
static unsigned int shdma = PVR2_CASCADE_CHAN;
static unsigned int pvr2dma = ONCHIP_NR_DMA_CHANNELS;
#endif
static int pvr2fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue,
unsigned int transp, struct fb_info *info);
static int pvr2fb_blank(int blank, struct fb_info *info);
static unsigned long get_line_length(int xres_virtual, int bpp);
static void set_color_bitfields(struct fb_var_screeninfo *var);
static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
static int pvr2fb_set_par(struct fb_info *info);
static void pvr2_update_display(struct fb_info *info);
static void pvr2_init_display(struct fb_info *info);
static void pvr2_do_blank(void);
static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id);
static int pvr2_init_cable(void);
static int pvr2_get_param(const struct pvr2_params *p, const char *s,
int val, int size);
#ifdef CONFIG_PVR2_DMA
static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
size_t count, loff_t *ppos);
#endif
static struct fb_ops pvr2fb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = pvr2fb_setcolreg,
.fb_blank = pvr2fb_blank,
.fb_check_var = pvr2fb_check_var,
.fb_set_par = pvr2fb_set_par,
#ifdef CONFIG_PVR2_DMA
.fb_write = pvr2fb_write,
#endif
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
static struct fb_videomode pvr2_modedb[] __devinitdata = {
/*
* Broadcast video modes (PAL and NTSC). I'm unfamiliar with
* PAL-M and PAL-N, but from what I've read both modes parallel PAL and
* NTSC, so it shouldn't be a problem (I hope).
*/
{
/* 640x480 @ 60Hz interlaced (NTSC) */
"ntsc_640x480i", 60, 640, 480, TV_CLK, 38, 33, 0, 18, 146, 26,
FB_SYNC_BROADCAST, FB_VMODE_INTERLACED | FB_VMODE_YWRAP
}, {
/* 640x240 @ 60Hz (NTSC) */
/* XXX: Broken! Don't use... */
"ntsc_640x240", 60, 640, 240, TV_CLK, 38, 33, 0, 0, 146, 22,
FB_SYNC_BROADCAST, FB_VMODE_YWRAP
}, {
/* 640x480 @ 60hz (VGA) */
"vga_640x480", 60, 640, 480, VGA_CLK, 38, 33, 0, 18, 146, 26,
0, FB_VMODE_YWRAP
},
};
#define NUM_TOTAL_MODES ARRAY_SIZE(pvr2_modedb)
#define DEFMODE_NTSC 0
#define DEFMODE_PAL 0
#define DEFMODE_VGA 2
static int defmode = DEFMODE_NTSC;
static char *mode_option __devinitdata = NULL;
static inline void pvr2fb_set_pal_type(unsigned int type)
{
struct pvr2fb_par *par = (struct pvr2fb_par *)fb_info->par;
fb_writel(type, par->mmio_base + 0x108);
}
static inline void pvr2fb_set_pal_entry(struct pvr2fb_par *par,
unsigned int regno,
unsigned int val)
{
fb_writel(val, par->mmio_base + 0x1000 + (4 * regno));
}
static int pvr2fb_blank(int blank, struct fb_info *info)
{
do_blank = blank ? blank : -1;
return 0;
}
static inline unsigned long get_line_length(int xres_virtual, int bpp)
{
return (unsigned long)((((xres_virtual*bpp)+31)&~31) >> 3);
}
static void set_color_bitfields(struct fb_var_screeninfo *var)
{
switch (var->bits_per_pixel) {
case 16: /* RGB 565 */
pvr2fb_set_pal_type(PAL_RGB565);
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;
case 24: /* RGB 888 */
var->red.offset = 16; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 0; var->transp.length = 0;
break;
case 32: /* ARGB 8888 */
pvr2fb_set_pal_type(PAL_ARGB8888);
var->red.offset = 16; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 24; var->transp.length = 8;
break;
}
}
static int pvr2fb_setcolreg(unsigned int regno, unsigned int red,
unsigned int green, unsigned int blue,
unsigned int transp, struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
unsigned int tmp;
if (regno > info->cmap.len)
return 1;
/*
* We only support the hardware palette for 16 and 32bpp. It's also
* expected that the palette format has been set by the time we get
* here, so we don't waste time setting it again.
*/
switch (info->var.bits_per_pixel) {
case 16: /* RGB 565 */
tmp = (red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
pvr2fb_set_pal_entry(par, regno, tmp);
break;
case 24: /* RGB 888 */
red >>= 8; green >>= 8; blue >>= 8;
tmp = (red << 16) | (green << 8) | blue;
break;
case 32: /* ARGB 8888 */
red >>= 8; green >>= 8; blue >>= 8;
tmp = (transp << 24) | (red << 16) | (green << 8) | blue;
pvr2fb_set_pal_entry(par, regno, tmp);
break;
default:
pr_debug("Invalid bit depth %d?!?\n", info->var.bits_per_pixel);
return 1;
}
if (regno < 16)
((u32*)(info->pseudo_palette))[regno] = tmp;
return 0;
}
static int pvr2fb_set_par(struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
struct fb_var_screeninfo *var = &info->var;
unsigned long line_length;
unsigned int vtotal;
/*
* XXX: It's possible that a user could use a VGA box, change the cable
* type in hardware (i.e. switch from VGA<->composite), then change
* modes (i.e. switching to another VT). If that happens we should
* automagically change the output format to cope, but currently I
* don't have a VGA box to make sure this works properly.
*/
cable_type = pvr2_init_cable();
if (cable_type == CT_VGA && video_output != VO_VGA)
video_output = VO_VGA;
var->vmode &= FB_VMODE_MASK;
if (var->vmode & FB_VMODE_INTERLACED && video_output != VO_VGA)
par->is_interlaced = 1;
/*
* XXX: Need to be more creative with this (i.e. allow doublecan for
* PAL/NTSC output).
*/
if (var->vmode & FB_VMODE_DOUBLE && video_output == VO_VGA)
par->is_doublescan = 1;
par->hsync_total = var->left_margin + var->xres + var->right_margin +
var->hsync_len;
par->vsync_total = var->upper_margin + var->yres + var->lower_margin +
var->vsync_len;
if (var->sync & FB_SYNC_BROADCAST) {
vtotal = par->vsync_total;
if (par->is_interlaced)
vtotal /= 2;
if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) {
/* XXX: Check for start values here... */
/* XXX: Check hardware for PAL-compatibility */
par->borderstart_h = 116;
par->borderstart_v = 44;
} else {
/* NTSC video output */
par->borderstart_h = 126;
par->borderstart_v = 18;
}
} else {
/* VGA mode */
/* XXX: What else needs to be checked? */
/*
* XXX: We have a little freedom in VGA modes, what ranges
* should be here (i.e. hsync/vsync totals, etc.)?
*/
par->borderstart_h = 126;
par->borderstart_v = 40;
}
/* Calculate the remainding offsets */
par->diwstart_h = par->borderstart_h + var->left_margin;
par->diwstart_v = par->borderstart_v + var->upper_margin;
par->borderstop_h = par->diwstart_h + var->xres +
var->right_margin;
par->borderstop_v = par->diwstart_v + var->yres +
var->lower_margin;
if (!par->is_interlaced)
par->borderstop_v /= 2;
if (info->var.xres < 640)
par->is_lowres = 1;
line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
par->disp_start = info->fix.smem_start + (line_length * var->yoffset) * line_length;
info->fix.line_length = line_length;
return 0;
}
static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
unsigned int vtotal, hsync_total;
unsigned long line_length;
if (var->pixclock != TV_CLK && var->pixclock != VGA_CLK) {
pr_debug("Invalid pixclock value %d\n", var->pixclock);
return -EINVAL;
}
if (var->xres < 320)
var->xres = 320;
if (var->yres < 240)
var->yres = 240;
if (var->xres_virtual < var->xres)
var->xres_virtual = var->xres;
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
if (var->bits_per_pixel <= 16)
var->bits_per_pixel = 16;
else if (var->bits_per_pixel <= 24)
var->bits_per_pixel = 24;
else if (var->bits_per_pixel <= 32)
var->bits_per_pixel = 32;
set_color_bitfields(var);
if (var->vmode & FB_VMODE_YWRAP) {
if (var->xoffset || var->yoffset < 0 ||
var->yoffset >= var->yres_virtual) {
var->xoffset = var->yoffset = 0;
} else {
if (var->xoffset > var->xres_virtual - var->xres ||
var->yoffset > var->yres_virtual - var->yres ||
var->xoffset < 0 || var->yoffset < 0)
var->xoffset = var->yoffset = 0;
}
} else {
var->xoffset = var->yoffset = 0;
}
/*
* XXX: Need to be more creative with this (i.e. allow doublecan for
* PAL/NTSC output).
*/
if (var->yres < 480 && video_output == VO_VGA)
var->vmode |= FB_VMODE_DOUBLE;
if (video_output != VO_VGA) {
var->sync |= FB_SYNC_BROADCAST;
var->vmode |= FB_VMODE_INTERLACED;
} else {
var->sync &= ~FB_SYNC_BROADCAST;
var->vmode &= ~FB_VMODE_INTERLACED;
var->vmode |= FB_VMODE_NONINTERLACED;
}
if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_TEST) {
var->right_margin = par->borderstop_h -
(par->diwstart_h + var->xres);
var->left_margin = par->diwstart_h - par->borderstart_h;
var->hsync_len = par->borderstart_h +
(par->hsync_total - par->borderstop_h);
var->upper_margin = par->diwstart_v - par->borderstart_v;
var->lower_margin = par->borderstop_v -
(par->diwstart_v + var->yres);
var->vsync_len = par->borderstop_v +
(par->vsync_total - par->borderstop_v);
}
hsync_total = var->left_margin + var->xres + var->right_margin +
var->hsync_len;
vtotal = var->upper_margin + var->yres + var->lower_margin +
var->vsync_len;
if (var->sync & FB_SYNC_BROADCAST) {
if (var->vmode & FB_VMODE_INTERLACED)
vtotal /= 2;
if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) {
/* PAL video output */
/* XXX: Should be using a range here ... ? */
if (hsync_total != PAL_HTOTAL) {
pr_debug("invalid hsync total for PAL\n");
return -EINVAL;
}
} else {
/* NTSC video output */
if (hsync_total != NTSC_HTOTAL) {
pr_debug("invalid hsync total for NTSC\n");
return -EINVAL;
}
}
}
/* Check memory sizes */
line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
if (line_length * var->yres_virtual > info->fix.smem_len)
return -ENOMEM;
return 0;
}
static void pvr2_update_display(struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *) info->par;
struct fb_var_screeninfo *var = &info->var;
/* Update the start address of the display image */
fb_writel(par->disp_start, DISP_DIWADDRL);
fb_writel(par->disp_start +
get_line_length(var->xoffset+var->xres, var->bits_per_pixel),
DISP_DIWADDRS);
}
/*
* Initialize the video mode. Currently, the 16bpp and 24bpp modes aren't
* very stable. It's probably due to the fact that a lot of the 2D video
* registers are still undocumented.
*/
static void pvr2_init_display(struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *) info->par;
struct fb_var_screeninfo *var = &info->var;
unsigned int diw_height, diw_width, diw_modulo = 1;
unsigned int bytesperpixel = var->bits_per_pixel >> 3;
/* hsync and vsync totals */
fb_writel((par->vsync_total << 16) | par->hsync_total, DISP_SYNCSIZE);
/* column height, modulo, row width */
/* since we're "panning" within vram, we need to offset things based
* on the offset from the virtual x start to our real gfx. */
if (video_output != VO_VGA && par->is_interlaced)
diw_modulo += info->fix.line_length / 4;
diw_height = (par->is_interlaced ? var->yres / 2 : var->yres);
diw_width = get_line_length(var->xres, var->bits_per_pixel) / 4;
fb_writel((diw_modulo << 20) | (--diw_height << 10) | --diw_width,
DISP_DIWSIZE);
/* display address, long and short fields */
fb_writel(par->disp_start, DISP_DIWADDRL);
fb_writel(par->disp_start +
get_line_length(var->xoffset+var->xres, var->bits_per_pixel),
DISP_DIWADDRS);
/* border horizontal, border vertical, border color */
fb_writel((par->borderstart_h << 16) | par->borderstop_h, DISP_BRDRHORZ);
fb_writel((par->borderstart_v << 16) | par->borderstop_v, DISP_BRDRVERT);
fb_writel(0, DISP_BRDRCOLR);
/* display window start position */
fb_writel(par->diwstart_h, DISP_DIWHSTRT);
fb_writel((par->diwstart_v << 16) | par->diwstart_v, DISP_DIWVSTRT);
/* misc. settings */
fb_writel((0x16 << 16) | par->is_lowres, DISP_DIWCONF);
/* clock doubler (for VGA), scan doubler, display enable */
fb_writel(((video_output == VO_VGA) << 23) |
(par->is_doublescan << 1) | 1, DISP_DIWMODE);
/* bits per pixel */
fb_writel(fb_readl(DISP_DIWMODE) | (--bytesperpixel << 2), DISP_DIWMODE);
fb_writel(bytesperpixel << 2, DISP_PIXDEPTH);
/* video enable, color sync, interlace,
* hsync and vsync polarity (currently unused) */
fb_writel(0x100 | ((par->is_interlaced /*|4*/) << 4), DISP_SYNCCONF);
}
/* Simulate blanking by making the border cover the entire screen */
#define BLANK_BIT (1<<3)
static void pvr2_do_blank(void)
{
struct pvr2fb_par *par = currentpar;
unsigned long diwconf;
diwconf = fb_readl(DISP_DIWCONF);
if (do_blank > 0)
fb_writel(diwconf | BLANK_BIT, DISP_DIWCONF);
else
fb_writel(diwconf & ~BLANK_BIT, DISP_DIWCONF);
is_blanked = do_blank > 0 ? do_blank : 0;
}
static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id)
{
struct fb_info *info = dev_id;
if (do_vmode_pan || do_vmode_full)
pvr2_update_display(info);
if (do_vmode_full)
pvr2_init_display(info);
if (do_vmode_pan)
do_vmode_pan = 0;
if (do_vmode_full)
do_vmode_full = 0;
if (do_blank) {
pvr2_do_blank();
do_blank = 0;
}
return IRQ_HANDLED;
}
/*
* Determine the cable type and initialize the cable output format. Don't do
* anything if the cable type has been overidden (via "cable:XX").
*/
#define PCTRA 0xff80002c
#define PDTRA 0xff800030
#define VOUTC 0xa0702c00
static int pvr2_init_cable(void)
{
if (cable_type < 0) {
fb_writel((fb_readl(PCTRA) & 0xfff0ffff) | 0x000a0000,
PCTRA);
cable_type = (fb_readw(PDTRA) >> 8) & 3;
}
/* Now select the output format (either composite or other) */
/* XXX: Save the previous val first, as this reg is also AICA
related */
if (cable_type == CT_COMPOSITE)
fb_writel(3 << 8, VOUTC);
else if (cable_type == CT_RGB)
fb_writel(1 << 9, VOUTC);
else
fb_writel(0, VOUTC);
return cable_type;
}
#ifdef CONFIG_PVR2_DMA
static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
size_t count, loff_t *ppos)
{
unsigned long dst, start, end, len;
unsigned int nr_pages;
struct page **pages;
int ret, i;
nr_pages = (count + PAGE_SIZE - 1) >> PAGE_SHIFT;
pages = kmalloc(nr_pages * sizeof(struct page *), GFP_KERNEL);
if (!pages)
return -ENOMEM;
down_read(&current->mm->mmap_sem);
ret = get_user_pages(current, current->mm, (unsigned long)buf,
nr_pages, WRITE, 0, pages, NULL);
up_read(&current->mm->mmap_sem);
if (ret < nr_pages) {
nr_pages = ret;
ret = -EINVAL;
goto out_unmap;
}
dma_configure_channel(shdma, 0x12c1);
dst = (unsigned long)fb_info->screen_base + *ppos;
start = (unsigned long)page_address(pages[0]);
end = (unsigned long)page_address(pages[nr_pages]);
len = nr_pages << PAGE_SHIFT;
/* Half-assed contig check */
if (start + len == end) {
/* As we do this in one shot, it's either all or nothing.. */
if ((*ppos + len) > fb_info->fix.smem_len) {
ret = -ENOSPC;
goto out_unmap;
}
dma_write(shdma, start, 0, len);
dma_write(pvr2dma, 0, dst, len);
dma_wait_for_completion(pvr2dma);
goto out;
}
/* Not contiguous, writeout per-page instead.. */
for (i = 0; i < nr_pages; i++, dst += PAGE_SIZE) {
if ((*ppos + (i << PAGE_SHIFT)) > fb_info->fix.smem_len) {
ret = -ENOSPC;
goto out_unmap;
}
dma_write_page(shdma, (unsigned long)page_address(pages[i]), 0);
dma_write_page(pvr2dma, 0, dst);
dma_wait_for_completion(pvr2dma);
}
out:
*ppos += count;
ret = count;
out_unmap:
for (i = 0; i < nr_pages; i++)
page_cache_release(pages[i]);
kfree(pages);
return ret;
}
#endif /* CONFIG_PVR2_DMA */
/**
* pvr2fb_common_init
*
* Common init code for the PVR2 chips.
*
* This mostly takes care of the common aspects of the fb setup and
* registration. It's expected that the board-specific init code has
* already setup pvr2_fix with something meaningful at this point.
*
* Device info reporting is also done here, as well as picking a sane
* default from the modedb. For board-specific modelines, simply define
* a per-board modedb.
*
* Also worth noting is that the cable and video output types are likely
* always going to be VGA for the PCI-based PVR2 boards, but we leave this
* in for flexibility anyways. Who knows, maybe someone has tv-out on a
* PCI-based version of these things ;-)
*/
static int __devinit pvr2fb_common_init(void)
{
struct pvr2fb_par *par = currentpar;
unsigned long modememused, rev;
fb_info->screen_base = ioremap_nocache(pvr2_fix.smem_start,
pvr2_fix.smem_len);
if (!fb_info->screen_base) {
printk(KERN_ERR "pvr2fb: Failed to remap smem space\n");
goto out_err;
}
par->mmio_base = (unsigned long)ioremap_nocache(pvr2_fix.mmio_start,
pvr2_fix.mmio_len);
if (!par->mmio_base) {
printk(KERN_ERR "pvr2fb: Failed to remap mmio space\n");
goto out_err;
}
fb_memset(fb_info->screen_base, 0, pvr2_fix.smem_len);
pvr2_fix.ypanstep = nopan ? 0 : 1;
pvr2_fix.ywrapstep = nowrap ? 0 : 1;
fb_info->fbops = &pvr2fb_ops;
fb_info->fix = pvr2_fix;
fb_info->par = currentpar;
fb_info->pseudo_palette = currentpar->palette;
fb_info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
if (video_output == VO_VGA)
defmode = DEFMODE_VGA;
if (!mode_option)
mode_option = "640x480@60";
if (!fb_find_mode(&fb_info->var, fb_info, mode_option, pvr2_modedb,
NUM_TOTAL_MODES, &pvr2_modedb[defmode], 16))
fb_info->var = pvr2_var;
fb_alloc_cmap(&fb_info->cmap, 256, 0);
if (register_framebuffer(fb_info) < 0)
goto out_err;
/*Must write PIXDEPTH to register before anything is displayed - so force init */
pvr2_init_display(fb_info);
modememused = get_line_length(fb_info->var.xres_virtual,
fb_info->var.bits_per_pixel);
modememused *= fb_info->var.yres_virtual;
rev = fb_readl(par->mmio_base + 0x04);
printk("fb%d: %s (rev %ld.%ld) frame buffer device, using %ldk/%ldk of video memory\n",
fb_info->node, fb_info->fix.id, (rev >> 4) & 0x0f, rev & 0x0f,
modememused >> 10, (unsigned long)(fb_info->fix.smem_len >> 10));
printk("fb%d: Mode %dx%d-%d pitch = %ld cable: %s video output: %s\n",
fb_info->node, fb_info->var.xres, fb_info->var.yres,
fb_info->var.bits_per_pixel,
get_line_length(fb_info->var.xres, fb_info->var.bits_per_pixel),
(char *)pvr2_get_param(cables, NULL, cable_type, 3),
(char *)pvr2_get_param(outputs, NULL, video_output, 3));
#ifdef CONFIG_SH_STORE_QUEUES
printk(KERN_NOTICE "fb%d: registering with SQ API\n", fb_info->node);
pvr2fb_map = sq_remap(fb_info->fix.smem_start, fb_info->fix.smem_len,
fb_info->fix.id, PAGE_SHARED);
printk(KERN_NOTICE "fb%d: Mapped video memory to SQ addr 0x%lx\n",
fb_info->node, pvr2fb_map);
#endif
return 0;
out_err:
if (fb_info->screen_base)
iounmap(fb_info->screen_base);
if (par->mmio_base)
iounmap((void *)par->mmio_base);
return -ENXIO;
}
#ifdef CONFIG_SH_DREAMCAST
static int __init pvr2fb_dc_init(void)
{
if (!mach_is_dreamcast())
return -ENXIO;
/* Make a guess at the monitor based on the attached cable */
if (pvr2_init_cable() == CT_VGA) {
fb_info->monspecs.hfmin = 30000;
fb_info->monspecs.hfmax = 70000;
fb_info->monspecs.vfmin = 60;
fb_info->monspecs.vfmax = 60;
} else {
/* Not VGA, using a TV (taken from acornfb) */
fb_info->monspecs.hfmin = 15469;
fb_info->monspecs.hfmax = 15781;
fb_info->monspecs.vfmin = 49;
fb_info->monspecs.vfmax = 51;
}
/*
* XXX: This needs to pull default video output via BIOS or other means
*/
if (video_output < 0) {
if (cable_type == CT_VGA) {
video_output = VO_VGA;
} else {
video_output = VO_NTSC;
}
}
/*
* Nothing exciting about the DC PVR2 .. only a measly 8MiB.
*/
pvr2_fix.smem_start = 0xa5000000; /* RAM starts here */
pvr2_fix.smem_len = 8 << 20;
pvr2_fix.mmio_start = 0xa05f8000; /* registers start here */
pvr2_fix.mmio_len = 0x2000;
if (request_irq(HW_EVENT_VSYNC, pvr2fb_interrupt, IRQF_SHARED,
"pvr2 VBL handler", fb_info)) {
return -EBUSY;
}
#ifdef CONFIG_PVR2_DMA
if (request_dma(pvr2dma, "pvr2") != 0) {
free_irq(HW_EVENT_VSYNC, 0);
return -EBUSY;
}
#endif
return pvr2fb_common_init();
}
static void __exit pvr2fb_dc_exit(void)
{
if (fb_info->screen_base) {
iounmap(fb_info->screen_base);
fb_info->screen_base = NULL;
}
if (currentpar->mmio_base) {
iounmap((void *)currentpar->mmio_base);
currentpar->mmio_base = 0;
}
free_irq(HW_EVENT_VSYNC, 0);
#ifdef CONFIG_PVR2_DMA
free_dma(pvr2dma);
#endif
}
#endif /* CONFIG_SH_DREAMCAST */
#ifdef CONFIG_PCI
static int __devinit pvr2fb_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int ret;
ret = pci_enable_device(pdev);
if (ret) {
printk(KERN_ERR "pvr2fb: PCI enable failed\n");
return ret;
}
ret = pci_request_regions(pdev, "pvr2fb");
if (ret) {
printk(KERN_ERR "pvr2fb: PCI request regions failed\n");
return ret;
}
/*
* Slightly more exciting than the DC PVR2 .. 16MiB!
*/
pvr2_fix.smem_start = pci_resource_start(pdev, 0);
pvr2_fix.smem_len = pci_resource_len(pdev, 0);
pvr2_fix.mmio_start = pci_resource_start(pdev, 1);
pvr2_fix.mmio_len = pci_resource_len(pdev, 1);
fb_info->device = &pdev->dev;
return pvr2fb_common_init();
}
static void __devexit pvr2fb_pci_remove(struct pci_dev *pdev)
{
if (fb_info->screen_base) {
iounmap(fb_info->screen_base);
fb_info->screen_base = NULL;
}
if (currentpar->mmio_base) {
iounmap((void *)currentpar->mmio_base);
currentpar->mmio_base = 0;
}
pci_release_regions(pdev);
}
static struct pci_device_id pvr2fb_pci_tbl[] __devinitdata = {
{ PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_NEON250,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, pvr2fb_pci_tbl);
static struct pci_driver pvr2fb_pci_driver = {
.name = "pvr2fb",
.id_table = pvr2fb_pci_tbl,
.probe = pvr2fb_pci_probe,
.remove = __devexit_p(pvr2fb_pci_remove),
};
static int __init pvr2fb_pci_init(void)
{
return pci_register_driver(&pvr2fb_pci_driver);
}
static void __exit pvr2fb_pci_exit(void)
{
pci_unregister_driver(&pvr2fb_pci_driver);
}
#endif /* CONFIG_PCI */
static int __devinit pvr2_get_param(const struct pvr2_params *p, const char *s,
int val, int size)
{
int i;
for (i = 0 ; i < size ; i++ ) {
if (s != NULL) {
if (!strnicmp(p[i].name, s, strlen(s)))
return p[i].val;
} else {
if (p[i].val == val)
return (int)p[i].name;
}
}
return -1;
}
/*
* Parse command arguments. Supported arguments are:
* inverse Use inverse color maps
* cable:composite|rgb|vga Override the video cable type
* output:NTSC|PAL|VGA Override the video output format
*
* <xres>x<yres>[-<bpp>][@<refresh>] or,
* <name>[-<bpp>][@<refresh>] Startup using this video mode
*/
#ifndef MODULE
static int __init pvr2fb_setup(char *options)
{
char *this_opt;
char cable_arg[80];
char output_arg[80];
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ","))) {
if (!*this_opt)
continue;
if (!strcmp(this_opt, "inverse")) {
fb_invert_cmaps();
} else if (!strncmp(this_opt, "cable:", 6)) {
strcpy(cable_arg, this_opt + 6);
} else if (!strncmp(this_opt, "output:", 7)) {
strcpy(output_arg, this_opt + 7);
} else if (!strncmp(this_opt, "nopan", 5)) {
nopan = 1;
} else if (!strncmp(this_opt, "nowrap", 6)) {
nowrap = 1;
} else {
mode_option = this_opt;
}
}
if (*cable_arg)
cable_type = pvr2_get_param(cables, cable_arg, 0, 3);
if (*output_arg)
video_output = pvr2_get_param(outputs, output_arg, 0, 3);
return 0;
}
#endif
static struct pvr2_board {
int (*init)(void);
void (*exit)(void);
char name[16];
} board_driver[] = {
#ifdef CONFIG_SH_DREAMCAST
{ pvr2fb_dc_init, pvr2fb_dc_exit, "Sega DC PVR2" },
#endif
#ifdef CONFIG_PCI
{ pvr2fb_pci_init, pvr2fb_pci_exit, "PCI PVR2" },
#endif
{ 0, },
};
static int __init pvr2fb_init(void)
{
int i, ret = -ENODEV;
int size;
#ifndef MODULE
char *option = NULL;
if (fb_get_options("pvr2fb", &option))
return -ENODEV;
pvr2fb_setup(option);
#endif
size = sizeof(struct fb_info) + sizeof(struct pvr2fb_par) + 16 * sizeof(u32);
fb_info = framebuffer_alloc(sizeof(struct pvr2fb_par), NULL);
if (!fb_info) {
printk(KERN_ERR "Failed to allocate memory for fb_info\n");
return -ENOMEM;
}
currentpar = fb_info->par;
for (i = 0; i < ARRAY_SIZE(board_driver); i++) {
struct pvr2_board *pvr_board = board_driver + i;
if (!pvr_board->init)
continue;
ret = pvr_board->init();
if (ret != 0) {
printk(KERN_ERR "pvr2fb: Failed init of %s device\n",
pvr_board->name);
framebuffer_release(fb_info);
break;
}
}
return ret;
}
static void __exit pvr2fb_exit(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(board_driver); i++) {
struct pvr2_board *pvr_board = board_driver + i;
if (pvr_board->exit)
pvr_board->exit();
}
#ifdef CONFIG_SH_STORE_QUEUES
sq_unmap(pvr2fb_map);
#endif
unregister_framebuffer(fb_info);
framebuffer_release(fb_info);
}
module_init(pvr2fb_init);
module_exit(pvr2fb_exit);
MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, M. R. Brown <mrbrown@0xd6.org>");
MODULE_DESCRIPTION("Framebuffer driver for NEC PowerVR 2 based graphics boards");
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink