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![Paul Mundt](/assets/img/avatar_default.png)
With arch/sh/drivers/dma/ always being built, the Dreamcast DMA engines are being unconditionally built in, regardless of whether the DMA API is enabled or not. This is a regression from previous behaviour, but there is not much advantage in building them all in unconditionally regardless. Add a new config option to make it optional, and update the only user of it to reflect that. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
1141 lines
31 KiB
C
1141 lines
31 KiB
C
/*
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* drivers/video/pvr2fb.c
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*
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* Frame buffer and fbcon support for the NEC PowerVR2 found within the Sega
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* Dreamcast.
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*
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* Copyright (c) 2001 M. R. Brown <mrbrown@0xd6.org>
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* Copyright (c) 2001 - 2008 Paul Mundt <lethal@linux-sh.org>
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*
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* This driver is mostly based on the excellent amifb and vfb sources. It uses
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* an odd scheme for converting hardware values to/from framebuffer values,
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* here are some hacked-up formulas:
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*
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* The Dreamcast has screen offsets from each side of its four borders and
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* the start offsets of the display window. I used these values to calculate
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* 'pseudo' values (think of them as placeholders) for the fb video mode, so
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* that when it came time to convert these values back into their hardware
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* values, I could just add mode- specific offsets to get the correct mode
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* settings:
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*
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* left_margin = diwstart_h - borderstart_h;
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* right_margin = borderstop_h - (diwstart_h + xres);
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* upper_margin = diwstart_v - borderstart_v;
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* lower_margin = borderstop_v - (diwstart_h + yres);
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*
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* hsync_len = borderstart_h + (hsync_total - borderstop_h);
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* vsync_len = borderstart_v + (vsync_total - borderstop_v);
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*
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* Then, when it's time to convert back to hardware settings, the only
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* constants are the borderstart_* offsets, all other values are derived from
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* the fb video mode:
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*
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* // PAL
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* borderstart_h = 116;
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* borderstart_v = 44;
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* ...
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* borderstop_h = borderstart_h + hsync_total - hsync_len;
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* ...
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* diwstart_v = borderstart_v - upper_margin;
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*
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* However, in the current implementation, the borderstart values haven't had
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* the benefit of being fully researched, so some modes may be broken.
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*/
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#undef DEBUG
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#ifdef CONFIG_SH_DREAMCAST
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#include <asm/machvec.h>
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#include <mach-dreamcast/mach/sysasic.h>
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#endif
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#ifdef CONFIG_PVR2_DMA
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#include <linux/pagemap.h>
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#include <mach/dma.h>
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#include <asm/dma.h>
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#endif
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#ifdef CONFIG_SH_STORE_QUEUES
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#include <linux/uaccess.h>
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#include <cpu/sq.h>
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#endif
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#ifndef PCI_DEVICE_ID_NEC_NEON250
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# define PCI_DEVICE_ID_NEC_NEON250 0x0067
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#endif
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/* 2D video registers */
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#define DISP_BASE par->mmio_base
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#define DISP_BRDRCOLR (DISP_BASE + 0x40)
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#define DISP_DIWMODE (DISP_BASE + 0x44)
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#define DISP_DIWADDRL (DISP_BASE + 0x50)
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#define DISP_DIWADDRS (DISP_BASE + 0x54)
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#define DISP_DIWSIZE (DISP_BASE + 0x5c)
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#define DISP_SYNCCONF (DISP_BASE + 0xd0)
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#define DISP_BRDRHORZ (DISP_BASE + 0xd4)
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#define DISP_SYNCSIZE (DISP_BASE + 0xd8)
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#define DISP_BRDRVERT (DISP_BASE + 0xdc)
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#define DISP_DIWCONF (DISP_BASE + 0xe8)
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#define DISP_DIWHSTRT (DISP_BASE + 0xec)
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#define DISP_DIWVSTRT (DISP_BASE + 0xf0)
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#define DISP_PIXDEPTH (DISP_BASE + 0x108)
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/* Pixel clocks, one for TV output, doubled for VGA output */
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#define TV_CLK 74239
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#define VGA_CLK 37119
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/* This is for 60Hz - the VTOTAL is doubled for interlaced modes */
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#define PAL_HTOTAL 863
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#define PAL_VTOTAL 312
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#define NTSC_HTOTAL 857
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#define NTSC_VTOTAL 262
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/* Supported cable types */
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enum { CT_VGA, CT_NONE, CT_RGB, CT_COMPOSITE };
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/* Supported video output types */
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enum { VO_PAL, VO_NTSC, VO_VGA };
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/* Supported palette types */
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enum { PAL_ARGB1555, PAL_RGB565, PAL_ARGB4444, PAL_ARGB8888 };
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struct pvr2_params { unsigned int val; char *name; };
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static struct pvr2_params cables[] __devinitdata = {
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{ CT_VGA, "VGA" }, { CT_RGB, "RGB" }, { CT_COMPOSITE, "COMPOSITE" },
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};
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static struct pvr2_params outputs[] __devinitdata = {
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{ VO_PAL, "PAL" }, { VO_NTSC, "NTSC" }, { VO_VGA, "VGA" },
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};
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/*
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* This describes the current video mode
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*/
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static struct pvr2fb_par {
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unsigned int hsync_total; /* Clocks/line */
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unsigned int vsync_total; /* Lines/field */
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unsigned int borderstart_h;
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unsigned int borderstop_h;
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unsigned int borderstart_v;
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unsigned int borderstop_v;
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unsigned int diwstart_h; /* Horizontal offset of the display field */
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unsigned int diwstart_v; /* Vertical offset of the display field, for
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interlaced modes, this is the long field */
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unsigned long disp_start; /* Address of image within VRAM */
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unsigned char is_interlaced; /* Is the display interlaced? */
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unsigned char is_doublescan; /* Are scanlines output twice? (doublescan) */
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unsigned char is_lowres; /* Is horizontal pixel-doubling enabled? */
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unsigned long mmio_base; /* MMIO base */
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u32 palette[16];
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} *currentpar;
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static struct fb_info *fb_info;
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static struct fb_fix_screeninfo pvr2_fix __devinitdata = {
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.id = "NEC PowerVR2",
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.type = FB_TYPE_PACKED_PIXELS,
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.visual = FB_VISUAL_TRUECOLOR,
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.ypanstep = 1,
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.ywrapstep = 1,
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.accel = FB_ACCEL_NONE,
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};
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static struct fb_var_screeninfo pvr2_var __devinitdata = {
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.xres = 640,
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.yres = 480,
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.xres_virtual = 640,
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.yres_virtual = 480,
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.bits_per_pixel =16,
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.red = { 11, 5, 0 },
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.green = { 5, 6, 0 },
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.blue = { 0, 5, 0 },
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.activate = FB_ACTIVATE_NOW,
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.height = -1,
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.width = -1,
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.vmode = FB_VMODE_NONINTERLACED,
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};
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static int cable_type = CT_VGA;
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static int video_output = VO_VGA;
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static int nopan = 0;
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static int nowrap = 1;
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/*
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* We do all updating, blanking, etc. during the vertical retrace period
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*/
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static unsigned int do_vmode_full = 0; /* Change the video mode */
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static unsigned int do_vmode_pan = 0; /* Update the video mode */
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static short do_blank = 0; /* (Un)Blank the screen */
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static unsigned int is_blanked = 0; /* Is the screen blanked? */
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#ifdef CONFIG_SH_STORE_QUEUES
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static unsigned long pvr2fb_map;
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#endif
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#ifdef CONFIG_PVR2_DMA
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static unsigned int shdma = PVR2_CASCADE_CHAN;
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static unsigned int pvr2dma = ONCHIP_NR_DMA_CHANNELS;
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#endif
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static int pvr2fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue,
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unsigned int transp, struct fb_info *info);
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static int pvr2fb_blank(int blank, struct fb_info *info);
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static unsigned long get_line_length(int xres_virtual, int bpp);
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static void set_color_bitfields(struct fb_var_screeninfo *var);
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static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
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static int pvr2fb_set_par(struct fb_info *info);
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static void pvr2_update_display(struct fb_info *info);
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static void pvr2_init_display(struct fb_info *info);
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static void pvr2_do_blank(void);
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static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id);
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static int pvr2_init_cable(void);
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static int pvr2_get_param(const struct pvr2_params *p, const char *s,
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int val, int size);
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#ifdef CONFIG_PVR2_DMA
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static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
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size_t count, loff_t *ppos);
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#endif
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static struct fb_ops pvr2fb_ops = {
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.owner = THIS_MODULE,
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.fb_setcolreg = pvr2fb_setcolreg,
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.fb_blank = pvr2fb_blank,
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.fb_check_var = pvr2fb_check_var,
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.fb_set_par = pvr2fb_set_par,
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#ifdef CONFIG_PVR2_DMA
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.fb_write = pvr2fb_write,
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#endif
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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};
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static struct fb_videomode pvr2_modedb[] __devinitdata = {
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/*
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* Broadcast video modes (PAL and NTSC). I'm unfamiliar with
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* PAL-M and PAL-N, but from what I've read both modes parallel PAL and
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* NTSC, so it shouldn't be a problem (I hope).
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*/
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{
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/* 640x480 @ 60Hz interlaced (NTSC) */
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"ntsc_640x480i", 60, 640, 480, TV_CLK, 38, 33, 0, 18, 146, 26,
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FB_SYNC_BROADCAST, FB_VMODE_INTERLACED | FB_VMODE_YWRAP
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}, {
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/* 640x240 @ 60Hz (NTSC) */
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/* XXX: Broken! Don't use... */
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"ntsc_640x240", 60, 640, 240, TV_CLK, 38, 33, 0, 0, 146, 22,
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FB_SYNC_BROADCAST, FB_VMODE_YWRAP
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}, {
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/* 640x480 @ 60hz (VGA) */
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"vga_640x480", 60, 640, 480, VGA_CLK, 38, 33, 0, 18, 146, 26,
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0, FB_VMODE_YWRAP
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},
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};
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#define NUM_TOTAL_MODES ARRAY_SIZE(pvr2_modedb)
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#define DEFMODE_NTSC 0
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#define DEFMODE_PAL 0
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#define DEFMODE_VGA 2
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static int defmode = DEFMODE_NTSC;
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static char *mode_option __devinitdata = NULL;
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static inline void pvr2fb_set_pal_type(unsigned int type)
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{
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struct pvr2fb_par *par = (struct pvr2fb_par *)fb_info->par;
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fb_writel(type, par->mmio_base + 0x108);
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}
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static inline void pvr2fb_set_pal_entry(struct pvr2fb_par *par,
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unsigned int regno,
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unsigned int val)
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{
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fb_writel(val, par->mmio_base + 0x1000 + (4 * regno));
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}
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static int pvr2fb_blank(int blank, struct fb_info *info)
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{
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do_blank = blank ? blank : -1;
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return 0;
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}
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static inline unsigned long get_line_length(int xres_virtual, int bpp)
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{
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return (unsigned long)((((xres_virtual*bpp)+31)&~31) >> 3);
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}
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static void set_color_bitfields(struct fb_var_screeninfo *var)
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{
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switch (var->bits_per_pixel) {
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case 16: /* RGB 565 */
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pvr2fb_set_pal_type(PAL_RGB565);
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var->red.offset = 11; var->red.length = 5;
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var->green.offset = 5; var->green.length = 6;
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var->blue.offset = 0; var->blue.length = 5;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case 24: /* RGB 888 */
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var->red.offset = 16; var->red.length = 8;
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var->green.offset = 8; var->green.length = 8;
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var->blue.offset = 0; var->blue.length = 8;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case 32: /* ARGB 8888 */
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pvr2fb_set_pal_type(PAL_ARGB8888);
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var->red.offset = 16; var->red.length = 8;
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var->green.offset = 8; var->green.length = 8;
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var->blue.offset = 0; var->blue.length = 8;
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var->transp.offset = 24; var->transp.length = 8;
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break;
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}
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}
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static int pvr2fb_setcolreg(unsigned int regno, unsigned int red,
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unsigned int green, unsigned int blue,
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unsigned int transp, struct fb_info *info)
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{
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struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
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unsigned int tmp;
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if (regno > info->cmap.len)
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return 1;
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/*
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* We only support the hardware palette for 16 and 32bpp. It's also
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* expected that the palette format has been set by the time we get
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* here, so we don't waste time setting it again.
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*/
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switch (info->var.bits_per_pixel) {
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case 16: /* RGB 565 */
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tmp = (red & 0xf800) |
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((green & 0xfc00) >> 5) |
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((blue & 0xf800) >> 11);
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pvr2fb_set_pal_entry(par, regno, tmp);
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break;
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case 24: /* RGB 888 */
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red >>= 8; green >>= 8; blue >>= 8;
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tmp = (red << 16) | (green << 8) | blue;
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break;
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case 32: /* ARGB 8888 */
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red >>= 8; green >>= 8; blue >>= 8;
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tmp = (transp << 24) | (red << 16) | (green << 8) | blue;
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pvr2fb_set_pal_entry(par, regno, tmp);
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break;
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default:
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pr_debug("Invalid bit depth %d?!?\n", info->var.bits_per_pixel);
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return 1;
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}
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if (regno < 16)
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((u32*)(info->pseudo_palette))[regno] = tmp;
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return 0;
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}
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static int pvr2fb_set_par(struct fb_info *info)
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{
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struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
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struct fb_var_screeninfo *var = &info->var;
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unsigned long line_length;
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unsigned int vtotal;
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/*
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* XXX: It's possible that a user could use a VGA box, change the cable
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* type in hardware (i.e. switch from VGA<->composite), then change
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* modes (i.e. switching to another VT). If that happens we should
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* automagically change the output format to cope, but currently I
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* don't have a VGA box to make sure this works properly.
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*/
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cable_type = pvr2_init_cable();
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if (cable_type == CT_VGA && video_output != VO_VGA)
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video_output = VO_VGA;
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var->vmode &= FB_VMODE_MASK;
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if (var->vmode & FB_VMODE_INTERLACED && video_output != VO_VGA)
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par->is_interlaced = 1;
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/*
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* XXX: Need to be more creative with this (i.e. allow doublecan for
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* PAL/NTSC output).
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*/
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if (var->vmode & FB_VMODE_DOUBLE && video_output == VO_VGA)
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par->is_doublescan = 1;
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par->hsync_total = var->left_margin + var->xres + var->right_margin +
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var->hsync_len;
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par->vsync_total = var->upper_margin + var->yres + var->lower_margin +
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var->vsync_len;
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if (var->sync & FB_SYNC_BROADCAST) {
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vtotal = par->vsync_total;
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if (par->is_interlaced)
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vtotal /= 2;
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if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) {
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/* XXX: Check for start values here... */
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/* XXX: Check hardware for PAL-compatibility */
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par->borderstart_h = 116;
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par->borderstart_v = 44;
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} else {
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/* NTSC video output */
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par->borderstart_h = 126;
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par->borderstart_v = 18;
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}
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} else {
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/* VGA mode */
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/* XXX: What else needs to be checked? */
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/*
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* XXX: We have a little freedom in VGA modes, what ranges
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* should be here (i.e. hsync/vsync totals, etc.)?
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*/
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par->borderstart_h = 126;
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par->borderstart_v = 40;
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}
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/* Calculate the remainding offsets */
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par->diwstart_h = par->borderstart_h + var->left_margin;
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par->diwstart_v = par->borderstart_v + var->upper_margin;
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par->borderstop_h = par->diwstart_h + var->xres +
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var->right_margin;
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par->borderstop_v = par->diwstart_v + var->yres +
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var->lower_margin;
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if (!par->is_interlaced)
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par->borderstop_v /= 2;
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if (info->var.xres < 640)
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par->is_lowres = 1;
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line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
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par->disp_start = info->fix.smem_start + (line_length * var->yoffset) * line_length;
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info->fix.line_length = line_length;
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return 0;
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}
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static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
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unsigned int vtotal, hsync_total;
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unsigned long line_length;
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if (var->pixclock != TV_CLK && var->pixclock != VGA_CLK) {
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pr_debug("Invalid pixclock value %d\n", var->pixclock);
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return -EINVAL;
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}
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if (var->xres < 320)
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var->xres = 320;
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if (var->yres < 240)
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var->yres = 240;
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if (var->xres_virtual < var->xres)
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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 __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, pgprot_val(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");
|