| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * 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? */ |
| |
| void __iomem *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 const 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 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; |
| } |
| |
| /* |
| * 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 ((void __iomem *)0xff80002c) |
| #define PDTRA ((void __iomem *)0xff800030) |
| #define VOUTC ((void __iomem *)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; |
| } |
| |
| 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 >= 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 = 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 __maybe_unused 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; |
| } |
| |
| #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_array(nr_pages, sizeof(struct page *), GFP_KERNEL); |
| if (!pages) |
| return -ENOMEM; |
| |
| ret = get_user_pages_fast((unsigned long)buf, nr_pages, FOLL_WRITE, pages); |
| 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++) |
| put_page(pages[i]); |
| |
| kfree(pages); |
| |
| return ret; |
| } |
| #endif /* CONFIG_PVR2_DMA */ |
| |
| 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, |
| }; |
| |
| #ifndef MODULE |
| static int pvr2_get_param_val(const struct pvr2_params *p, const char *s, |
| int size) |
| { |
| int i; |
| |
| for (i = 0; i < size; i++) { |
| if (!strncasecmp(p[i].name, s, strlen(s))) |
| return p[i].val; |
| } |
| return -1; |
| } |
| #endif |
| |
| static char *pvr2_get_param_name(const struct pvr2_params *p, int val, |
| int size) |
| { |
| int i; |
| |
| for (i = 0; i < size; i++) { |
| if (p[i].val == val) |
| return p[i].name; |
| } |
| return NULL; |
| } |
| |
| /** |
| * 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 __maybe_unused 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 = 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), |
| pvr2_get_param_name(cables, cable_type, 3), |
| pvr2_get_param_name(outputs, 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(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 pvr2fb_dc_exit(void) |
| { |
| if (fb_info->screen_base) { |
| iounmap(fb_info->screen_base); |
| fb_info->screen_base = NULL; |
| } |
| if (currentpar->mmio_base) { |
| iounmap(currentpar->mmio_base); |
| currentpar->mmio_base = NULL; |
| } |
| |
| 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(currentpar->mmio_base); |
| currentpar->mmio_base = NULL; |
| } |
| |
| pci_release_regions(pdev); |
| } |
| |
| static const 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 pvr2fb_pci_exit(void) |
| { |
| pci_unregister_driver(&pvr2fb_pci_driver); |
| } |
| #endif /* CONFIG_PCI */ |
| |
| /* |
| * 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_val(cables, cable_arg, 3); |
| if (*output_arg) |
| video_output = pvr2_get_param_val(outputs, output_arg, 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; |
| |
| #ifndef MODULE |
| char *option = NULL; |
| |
| if (fb_get_options("pvr2fb", &option)) |
| return -ENODEV; |
| pvr2fb_setup(option); |
| #endif |
| |
| fb_info = framebuffer_alloc(sizeof(struct pvr2fb_par), NULL); |
| if (!fb_info) |
| 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"); |