diff options
Diffstat (limited to 'drivers/video/pvr2fb.c')
| -rw-r--r-- | drivers/video/pvr2fb.c | 1142 |
1 files changed, 0 insertions, 1142 deletions
diff --git a/drivers/video/pvr2fb.c b/drivers/video/pvr2fb.c deleted file mode 100644 index 167cfff..0000000 --- a/drivers/video/pvr2fb.c +++ /dev/null @@ -1,1142 +0,0 @@ -/* - * 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[] = { - { CT_VGA, "VGA" }, { CT_RGB, "RGB" }, { CT_COMPOSITE, "COMPOSITE" }, -}; - -static struct pvr2_params outputs[] = { - { 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 = { - .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 = { - .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[] = { - /* - * 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 = 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(¤t->mm->mmap_sem); - ret = get_user_pages(current, current->mm, (unsigned long)buf, - nr_pages, WRITE, 0, pages, NULL); - up_read(¤t->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 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); - - fb_info(fb_info, "%s (rev %ld.%ld) frame buffer device, using %ldk/%ldk of video memory\n", - fb_info->fix.id, (rev >> 4) & 0x0f, rev & 0x0f, - modememused >> 10, - (unsigned long)(fb_info->fix.smem_len >> 10)); - fb_info(fb_info, "Mode %dx%d-%d pitch = %ld cable: %s video output: %s\n", - 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 - fb_notice(fb_info, "registering with SQ API\n"); - - pvr2fb_map = sq_remap(fb_info->fix.smem_start, fb_info->fix.smem_len, - fb_info->fix.id, PAGE_SHARED); - - fb_notice(fb_info, "Mapped video memory to SQ addr 0x%lx\n", - 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, fb_info); - 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, fb_info); -#ifdef CONFIG_PVR2_DMA - free_dma(pvr2dma); -#endif -} -#endif /* CONFIG_SH_DREAMCAST */ - -#ifdef CONFIG_PCI -static int 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 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[] = { - { 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 = 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 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[] __refdata = { -#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"); |
