diff options
Diffstat (limited to 'drivers/video/pm2fb.c')
| -rw-r--r-- | drivers/video/pm2fb.c | 1314 |
1 files changed, 1314 insertions, 0 deletions
diff --git a/drivers/video/pm2fb.c b/drivers/video/pm2fb.c new file mode 100644 index 000000000000..5dceddedf507 --- /dev/null +++ b/drivers/video/pm2fb.c @@ -0,0 +1,1314 @@ +/* + * Permedia2 framebuffer driver. + * + * 2.5/2.6 driver: + * Copyright (c) 2003 Jim Hague (jim.hague@acm.org) + * + * based on 2.4 driver: + * Copyright (c) 1998-2000 Ilario Nardinocchi (nardinoc@CS.UniBO.IT) + * Copyright (c) 1999 Jakub Jelinek (jakub@redhat.com) + * + * and additional input from James Simmon's port of Hannu Mallat's tdfx + * driver. + * + * I have a Creative Graphics Blaster Exxtreme card - pm2fb on x86. I + * have no access to other pm2fb implementations. Sparc (and thus + * hopefully other big-endian) devices now work, thanks to a lot of + * testing work by Ron Murray. I have no access to CVision hardware, + * and therefore for now I am omitting the CVision code. + * + * Multiple boards support has been on the TODO list for ages. + * Don't expect this to change. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + * + * + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/tty.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <linux/pci.h> + +#include <video/permedia2.h> +#include <video/cvisionppc.h> + +#if !defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN) +#error "The endianness of the target host has not been defined." +#endif + +#if !defined(CONFIG_PCI) +#error "Only generic PCI cards supported." +#endif + +#undef PM2FB_MASTER_DEBUG +#ifdef PM2FB_MASTER_DEBUG +#define DPRINTK(a,b...) printk(KERN_DEBUG "pm2fb: %s: " a, __FUNCTION__ , ## b) +#else +#define DPRINTK(a,b...) +#endif + +/* + * Driver data + */ +static char *mode __devinitdata = NULL; + +/* + * The XFree GLINT driver will (I think to implement hardware cursor + * support on TVP4010 and similar where there is no RAMDAC - see + * comment in set_video) always request +ve sync regardless of what + * the mode requires. This screws me because I have a Sun + * fixed-frequency monitor which absolutely has to have -ve sync. So + * these flags allow the user to specify that requests for +ve sync + * should be silently turned in -ve sync. + */ +static int lowhsync __devinitdata = 0; +static int lowvsync __devinitdata = 0; + +/* + * The hardware state of the graphics card that isn't part of the + * screeninfo. + */ +struct pm2fb_par +{ + pm2type_t type; /* Board type */ + u32 fb_size; /* framebuffer memory size */ + unsigned char __iomem *v_fb; /* virtual address of frame buffer */ + unsigned char __iomem *v_regs;/* virtual address of p_regs */ + u32 memclock; /* memclock */ + u32 video; /* video flags before blanking */ + u32 mem_config; /* MemConfig reg at probe */ + u32 mem_control; /* MemControl reg at probe */ + u32 boot_address; /* BootAddress reg at probe */ +}; + +/* + * Here we define the default structs fb_fix_screeninfo and fb_var_screeninfo + * if we don't use modedb. + */ +static struct fb_fix_screeninfo pm2fb_fix __devinitdata = { + .id = "", + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_PSEUDOCOLOR, + .xpanstep = 1, + .ypanstep = 1, + .ywrapstep = 0, + .accel = FB_ACCEL_NONE, +}; + +/* + * Default video mode. In case the modedb doesn't work. + */ +static struct fb_var_screeninfo pm2fb_var __devinitdata = { + /* "640x480, 8 bpp @ 60 Hz */ + .xres = 640, + .yres = 480, + .xres_virtual = 640, + .yres_virtual = 480, + .bits_per_pixel =8, + .red = {0, 8, 0}, + .blue = {0, 8, 0}, + .green = {0, 8, 0}, + .activate = FB_ACTIVATE_NOW, + .height = -1, + .width = -1, + .accel_flags = 0, + .pixclock = 39721, + .left_margin = 40, + .right_margin = 24, + .upper_margin = 32, + .lower_margin = 11, + .hsync_len = 96, + .vsync_len = 2, + .vmode = FB_VMODE_NONINTERLACED +}; + +/* + * Utility functions + */ + +inline static u32 RD32(unsigned char __iomem *base, s32 off) +{ + return fb_readl(base + off); +} + +inline static void WR32(unsigned char __iomem *base, s32 off, u32 v) +{ + fb_writel(v, base + off); +} + +inline static u32 pm2_RD(struct pm2fb_par* p, s32 off) +{ + return RD32(p->v_regs, off); +} + +inline static void pm2_WR(struct pm2fb_par* p, s32 off, u32 v) +{ + WR32(p->v_regs, off, v); +} + +inline static u32 pm2_RDAC_RD(struct pm2fb_par* p, s32 idx) +{ + int index = PM2R_RD_INDEXED_DATA; + switch (p->type) { + case PM2_TYPE_PERMEDIA2: + pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, idx); + break; + case PM2_TYPE_PERMEDIA2V: + pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff); + index = PM2VR_RD_INDEXED_DATA; + break; + } + mb(); + return pm2_RD(p, index); +} + +inline static void pm2_RDAC_WR(struct pm2fb_par* p, s32 idx, u32 v) +{ + int index = PM2R_RD_INDEXED_DATA; + switch (p->type) { + case PM2_TYPE_PERMEDIA2: + pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, idx); + break; + case PM2_TYPE_PERMEDIA2V: + pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff); + index = PM2VR_RD_INDEXED_DATA; + break; + } + mb(); + pm2_WR(p, index, v); +} + +inline static void pm2v_RDAC_WR(struct pm2fb_par* p, s32 idx, u32 v) +{ + pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff); + mb(); + pm2_WR(p, PM2VR_RD_INDEXED_DATA, v); +} + +#ifdef CONFIG_FB_PM2_FIFO_DISCONNECT +#define WAIT_FIFO(p,a) +#else +inline static void WAIT_FIFO(struct pm2fb_par* p, u32 a) +{ + while( pm2_RD(p, PM2R_IN_FIFO_SPACE) < a ); + mb(); +} +#endif + +/* + * partial products for the supported horizontal resolutions. + */ +#define PACKPP(p0,p1,p2) (((p2) << 6) | ((p1) << 3) | (p0)) +static const struct { + u16 width; + u16 pp; +} pp_table[] = { + { 32, PACKPP(1, 0, 0) }, { 64, PACKPP(1, 1, 0) }, + { 96, PACKPP(1, 1, 1) }, { 128, PACKPP(2, 1, 1) }, + { 160, PACKPP(2, 2, 1) }, { 192, PACKPP(2, 2, 2) }, + { 224, PACKPP(3, 2, 1) }, { 256, PACKPP(3, 2, 2) }, + { 288, PACKPP(3, 3, 1) }, { 320, PACKPP(3, 3, 2) }, + { 384, PACKPP(3, 3, 3) }, { 416, PACKPP(4, 3, 1) }, + { 448, PACKPP(4, 3, 2) }, { 512, PACKPP(4, 3, 3) }, + { 544, PACKPP(4, 4, 1) }, { 576, PACKPP(4, 4, 2) }, + { 640, PACKPP(4, 4, 3) }, { 768, PACKPP(4, 4, 4) }, + { 800, PACKPP(5, 4, 1) }, { 832, PACKPP(5, 4, 2) }, + { 896, PACKPP(5, 4, 3) }, { 1024, PACKPP(5, 4, 4) }, + { 1056, PACKPP(5, 5, 1) }, { 1088, PACKPP(5, 5, 2) }, + { 1152, PACKPP(5, 5, 3) }, { 1280, PACKPP(5, 5, 4) }, + { 1536, PACKPP(5, 5, 5) }, { 1568, PACKPP(6, 5, 1) }, + { 1600, PACKPP(6, 5, 2) }, { 1664, PACKPP(6, 5, 3) }, + { 1792, PACKPP(6, 5, 4) }, { 2048, PACKPP(6, 5, 5) }, + { 0, 0 } }; + +static u32 partprod(u32 xres) +{ + int i; + + for (i = 0; pp_table[i].width && pp_table[i].width != xres; i++) + ; + if ( pp_table[i].width == 0 ) + DPRINTK("invalid width %u\n", xres); + return pp_table[i].pp; +} + +static u32 to3264(u32 timing, int bpp, int is64) +{ + switch (bpp) { + case 8: + timing >>= 2 + is64; + break; + case 16: + timing >>= 1 + is64; + break; + case 24: + timing = (timing * 3) >> (2 + is64); + break; + case 32: + if (is64) + timing >>= 1; + break; + } + return timing; +} + +static void pm2_mnp(u32 clk, unsigned char* mm, unsigned char* nn, + unsigned char* pp) +{ + unsigned char m; + unsigned char n; + unsigned char p; + u32 f; + s32 curr; + s32 delta = 100000; + + *mm = *nn = *pp = 0; + for (n = 2; n < 15; n++) { + for (m = 2; m; m++) { + f = PM2_REFERENCE_CLOCK * m / n; + if (f >= 150000 && f <= 300000) { + for ( p = 0; p < 5; p++, f >>= 1) { + curr = ( clk > f ) ? clk - f : f - clk; + if ( curr < delta ) { + delta=curr; + *mm=m; + *nn=n; + *pp=p; + } + } + } + } + } +} + +static void pm2v_mnp(u32 clk, unsigned char* mm, unsigned char* nn, + unsigned char* pp) +{ + unsigned char m; + unsigned char n; + unsigned char p; + u32 f; + s32 delta = 1000; + + *mm = *nn = *pp = 0; + for (n = 1; n; n++) { + for ( m = 1; m; m++) { + for ( p = 0; p < 2; p++) { + f = PM2_REFERENCE_CLOCK * n / (m * (1 << (p + 1))); + if ( clk > f - delta && clk < f + delta ) { + delta = ( clk > f ) ? clk - f : f - clk; + *mm=m; + *nn=n; + *pp=p; + } + } + } + } +} + +static void clear_palette(struct pm2fb_par* p) { + int i=256; + + WAIT_FIFO(p, 1); + pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, 0); + wmb(); + while (i--) { + WAIT_FIFO(p, 3); + pm2_WR(p, PM2R_RD_PALETTE_DATA, 0); + pm2_WR(p, PM2R_RD_PALETTE_DATA, 0); + pm2_WR(p, PM2R_RD_PALETTE_DATA, 0); + } +} + +static void reset_card(struct pm2fb_par* p) +{ + if (p->type == PM2_TYPE_PERMEDIA2V) + pm2_WR(p, PM2VR_RD_INDEX_HIGH, 0); + pm2_WR(p, PM2R_RESET_STATUS, 0); + mb(); + while (pm2_RD(p, PM2R_RESET_STATUS) & PM2F_BEING_RESET) + ; + mb(); +#ifdef CONFIG_FB_PM2_FIFO_DISCONNECT + DPRINTK("FIFO disconnect enabled\n"); + pm2_WR(p, PM2R_FIFO_DISCON, 1); + mb(); +#endif + + /* Restore stashed memory config information from probe */ + WAIT_FIFO(p, 3); + pm2_WR(p, PM2R_MEM_CONTROL, p->mem_control); + pm2_WR(p, PM2R_BOOT_ADDRESS, p->boot_address); + wmb(); + pm2_WR(p, PM2R_MEM_CONFIG, p->mem_config); +} + +static void reset_config(struct pm2fb_par* p) +{ + WAIT_FIFO(p, 52); + pm2_WR(p, PM2R_CHIP_CONFIG, pm2_RD(p, PM2R_CHIP_CONFIG)& + ~(PM2F_VGA_ENABLE|PM2F_VGA_FIXED)); + pm2_WR(p, PM2R_BYPASS_WRITE_MASK, ~(0L)); + pm2_WR(p, PM2R_FRAMEBUFFER_WRITE_MASK, ~(0L)); + pm2_WR(p, PM2R_FIFO_CONTROL, 0); + pm2_WR(p, PM2R_APERTURE_ONE, 0); + pm2_WR(p, PM2R_APERTURE_TWO, 0); + pm2_WR(p, PM2R_RASTERIZER_MODE, 0); + pm2_WR(p, PM2R_DELTA_MODE, PM2F_DELTA_ORDER_RGB); + pm2_WR(p, PM2R_LB_READ_FORMAT, 0); + pm2_WR(p, PM2R_LB_WRITE_FORMAT, 0); + pm2_WR(p, PM2R_LB_READ_MODE, 0); + pm2_WR(p, PM2R_LB_SOURCE_OFFSET, 0); + pm2_WR(p, PM2R_FB_SOURCE_OFFSET, 0); + pm2_WR(p, PM2R_FB_PIXEL_OFFSET, 0); + pm2_WR(p, PM2R_FB_WINDOW_BASE, 0); + pm2_WR(p, PM2R_LB_WINDOW_BASE, 0); + pm2_WR(p, PM2R_FB_SOFT_WRITE_MASK, ~(0L)); + pm2_WR(p, PM2R_FB_HARD_WRITE_MASK, ~(0L)); + pm2_WR(p, PM2R_FB_READ_PIXEL, 0); + pm2_WR(p, PM2R_DITHER_MODE, 0); + pm2_WR(p, PM2R_AREA_STIPPLE_MODE, 0); + pm2_WR(p, PM2R_DEPTH_MODE, 0); + pm2_WR(p, PM2R_STENCIL_MODE, 0); + pm2_WR(p, PM2R_TEXTURE_ADDRESS_MODE, 0); + pm2_WR(p, PM2R_TEXTURE_READ_MODE, 0); + pm2_WR(p, PM2R_TEXEL_LUT_MODE, 0); + pm2_WR(p, PM2R_YUV_MODE, 0); + pm2_WR(p, PM2R_COLOR_DDA_MODE, 0); + pm2_WR(p, PM2R_TEXTURE_COLOR_MODE, 0); + pm2_WR(p, PM2R_FOG_MODE, 0); + pm2_WR(p, PM2R_ALPHA_BLEND_MODE, 0); + pm2_WR(p, PM2R_LOGICAL_OP_MODE, 0); + pm2_WR(p, PM2R_STATISTICS_MODE, 0); + pm2_WR(p, PM2R_SCISSOR_MODE, 0); + pm2_WR(p, PM2R_FILTER_MODE, PM2F_SYNCHRONIZATION); + switch (p->type) { + case PM2_TYPE_PERMEDIA2: + pm2_RDAC_WR(p, PM2I_RD_MODE_CONTROL, 0); /* no overlay */ + pm2_RDAC_WR(p, PM2I_RD_CURSOR_CONTROL, 0); + pm2_RDAC_WR(p, PM2I_RD_MISC_CONTROL, PM2F_RD_PALETTE_WIDTH_8); + break; + case PM2_TYPE_PERMEDIA2V: + pm2v_RDAC_WR(p, PM2VI_RD_MISC_CONTROL, 1); /* 8bit */ + break; + } + pm2_RDAC_WR(p, PM2I_RD_COLOR_KEY_CONTROL, 0); + pm2_RDAC_WR(p, PM2I_RD_OVERLAY_KEY, 0); + pm2_RDAC_WR(p, PM2I_RD_RED_KEY, 0); + pm2_RDAC_WR(p, PM2I_RD_GREEN_KEY, 0); + pm2_RDAC_WR(p, PM2I_RD_BLUE_KEY, 0); +} + +static void set_aperture(struct pm2fb_par* p, u32 depth) +{ + /* + * The hardware is little-endian. When used in big-endian + * hosts, the on-chip aperture settings are used where + * possible to translate from host to card byte order. + */ + WAIT_FIFO(p, 4); +#ifdef __LITTLE_ENDIAN + pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_STANDARD); +#else + switch (depth) { + case 24: /* RGB->BGR */ + /* + * We can't use the aperture to translate host to + * card byte order here, so we switch to BGR mode + * in pm2fb_set_par(). + */ + case 8: /* B->B */ + pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_STANDARD); + break; + case 16: /* HL->LH */ + pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_HALFWORDSWAP); + break; + case 32: /* RGBA->ABGR */ + pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_BYTESWAP); + break; + } +#endif + + // We don't use aperture two, so this may be superflous + pm2_WR(p, PM2R_APERTURE_TWO, PM2F_APERTURE_STANDARD); +} + +static void set_color(struct pm2fb_par* p, unsigned char regno, + unsigned char r, unsigned char g, unsigned char b) +{ + WAIT_FIFO(p, 4); + pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, regno); + wmb(); + pm2_WR(p, PM2R_RD_PALETTE_DATA, r); + wmb(); + pm2_WR(p, PM2R_RD_PALETTE_DATA, g); + wmb(); + pm2_WR(p, PM2R_RD_PALETTE_DATA, b); +} + +static void set_memclock(struct pm2fb_par* par, u32 clk) +{ + int i; + unsigned char m, n, p; + + pm2_mnp(clk, &m, &n, &p); + WAIT_FIFO(par, 10); + pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 6); + wmb(); + pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_1, m); + pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_2, n); + wmb(); + pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 8|p); + wmb(); + pm2_RDAC_RD(par, PM2I_RD_MEMORY_CLOCK_STATUS); + rmb(); + for (i = 256; + i && !(pm2_RD(par, PM2R_RD_INDEXED_DATA) & PM2F_PLL_LOCKED); + i--) + ; +} + +static void set_pixclock(struct pm2fb_par* par, u32 clk) +{ + int i; + unsigned char m, n, p; + + switch (par->type) { + case PM2_TYPE_PERMEDIA2: + pm2_mnp(clk, &m, &n, &p); + WAIT_FIFO(par, 8); + pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 0); + wmb(); + pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A1, m); + pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A2, n); + wmb(); + pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 8|p); + wmb(); + pm2_RDAC_RD(par, PM2I_RD_PIXEL_CLOCK_STATUS); + rmb(); + for (i = 256; + i && !(pm2_RD(par, PM2R_RD_INDEXED_DATA) & PM2F_PLL_LOCKED); + i--) + ; + break; + case PM2_TYPE_PERMEDIA2V: + pm2v_mnp(clk/2, &m, &n, &p); + WAIT_FIFO(par, 8); + pm2_WR(par, PM2VR_RD_INDEX_HIGH, PM2VI_RD_CLK0_PRESCALE >> 8); + pm2v_RDAC_WR(par, PM2VI_RD_CLK0_PRESCALE, m); + pm2v_RDAC_WR(par, PM2VI_RD_CLK0_FEEDBACK, n); + pm2v_RDAC_WR(par, PM2VI_RD_CLK0_POSTSCALE, p); + pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0); + break; + } +} + +static void set_video(struct pm2fb_par* p, u32 video) { + u32 tmp; + u32 vsync; + + vsync = video; + + DPRINTK("video = 0x%x\n", video); + + /* + * The hardware cursor needs +vsync to recognise vert retrace. + * We may not be using the hardware cursor, but the X Glint + * driver may well. So always set +hsync/+vsync and then set + * the RAMDAC to invert the sync if necessary. + */ + vsync &= ~(PM2F_HSYNC_MASK|PM2F_VSYNC_MASK); + vsync |= PM2F_HSYNC_ACT_HIGH|PM2F_VSYNC_ACT_HIGH; + + WAIT_FIFO(p, 5); + pm2_WR(p, PM2R_VIDEO_CONTROL, vsync); + + switch (p->type) { + case PM2_TYPE_PERMEDIA2: + tmp = PM2F_RD_PALETTE_WIDTH_8; + if ((video & PM2F_HSYNC_MASK) == PM2F_HSYNC_ACT_LOW) + tmp |= 4; /* invert hsync */ + if ((video & PM2F_VSYNC_MASK) == PM2F_VSYNC_ACT_LOW) + tmp |= 8; /* invert vsync */ + pm2_RDAC_WR(p, PM2I_RD_MISC_CONTROL, tmp); + break; + case PM2_TYPE_PERMEDIA2V: + tmp = 0; + if ((video & PM2F_HSYNC_MASK) == PM2F_HSYNC_ACT_LOW) + tmp |= 1; /* invert hsync */ + if ((video & PM2F_VSYNC_MASK) == PM2F_VSYNC_ACT_LOW) + tmp |= 4; /* invert vsync */ + pm2v_RDAC_WR(p, PM2VI_RD_SYNC_CONTROL, tmp); + pm2v_RDAC_WR(p, PM2VI_RD_MISC_CONTROL, 1); + break; + } +} + +/* + * + */ + +/** + * pm2fb_check_var - Optional function. Validates a var passed in. + * @var: frame buffer variable screen structure + * @info: frame buffer structure that represents a single frame buffer + * + * Checks to see if the hardware supports the state requested by + * var passed in. + * + * Returns negative errno on error, or zero on success. + */ +static int pm2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) +{ + u32 lpitch; + + if (var->bits_per_pixel != 8 && var->bits_per_pixel != 16 && + var->bits_per_pixel != 24 && var->bits_per_pixel != 32) { + DPRINTK("depth not supported: %u\n", var->bits_per_pixel); + return -EINVAL; + } + + if (var->xres != var->xres_virtual) { + DPRINTK("virtual x resolution != physical x resolution not supported\n"); + return -EINVAL; + } + + if (var->yres > var->yres_virtual) { + DPRINTK("virtual y resolution < physical y resolution not possible\n"); + return -EINVAL; + } + + if (var->xoffset) { + DPRINTK("xoffset not supported\n"); + return -EINVAL; + } + + if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) { + DPRINTK("interlace not supported\n"); + return -EINVAL; + } + + var->xres = (var->xres + 15) & ~15; /* could sometimes be 8 */ + lpitch = var->xres * ((var->bits_per_pixel + 7)>>3); + + if (var->xres < 320 || var->xres > 1600) { + DPRINTK("width not supported: %u\n", var->xres); + return -EINVAL; + } + + if (var->yres < 200 || var->yres > 1200) { + DPRINTK("height not supported: %u\n", var->yres); + return -EINVAL; + } + + if (lpitch * var->yres_virtual > info->fix.smem_len) { + DPRINTK("no memory for screen (%ux%ux%u)\n", + var->xres, var->yres_virtual, var->bits_per_pixel); + return -EINVAL; + } + + if (PICOS2KHZ(var->pixclock) > PM2_MAX_PIXCLOCK) { + DPRINTK("pixclock too high (%ldKHz)\n", PICOS2KHZ(var->pixclock)); + return -EINVAL; + } + + switch(var->bits_per_pixel) { + case 8: + var->red.length = var->green.length = var->blue.length = 8; + break; + case 16: + var->red.offset = 11; + var->red.length = 5; + var->green.offset = 5; + var->green.length = 6; + var->blue.offset = 0; + var->blue.length = 5; + break; + case 32: + var->transp.offset = 24; + var->transp.length = 8; + var->red.offset = 16; + var->green.offset = 8; + var->blue.offset = 0; + var->red.length = var->green.length = var->blue.length = 8; + break; + case 24: +#ifdef __BIG_ENDIAN + var->red.offset = 0; + var->blue.offset = 16; +#else + var->red.offset = 16; + var->blue.offset = 0; +#endif + var->green.offset = 8; + var->red.length = var->green.length = var->blue.length = 8; + break; + } + var->height = var->width = -1; + + var->accel_flags = 0; /* Can't mmap if this is on */ + + DPRINTK("Checking graphics mode at %dx%d depth %d\n", + var->xres, var->yres, var->bits_per_pixel); + return 0; +} + +/** + * pm2fb_set_par - Alters the hardware state. + * @info: frame buffer structure that represents a single frame buffer + * + * Using the fb_var_screeninfo in fb_info we set the resolution of the + * this particular framebuffer. + */ +static int pm2fb_set_par(struct fb_info *info) +{ + struct pm2fb_par *par = (struct pm2fb_par *) info->par; + u32 pixclock; + u32 width, height, depth; + u32 hsstart, hsend, hbend, htotal; + u32 vsstart, vsend, vbend, vtotal; + u32 stride; + u32 base; + u32 video = 0; + u32 clrmode = PM2F_RD_COLOR_MODE_RGB | PM2F_RD_GUI_ACTIVE; + u32 txtmap = 0; + u32 pixsize = 0; + u32 clrformat = 0; + u32 xres; + int data64; + + reset_card(par); + reset_config(par); + clear_palette(par); + if ( par->memclock ) + set_memclock(par, par->memclock); + + width = (info->var.xres_virtual + 7) & ~7; + height = info->var.yres_virtual; + depth = (info->var.bits_per_pixel + 7) & ~7; + depth = (depth > 32) ? 32 : depth; + data64 = depth > 8 || par->type == PM2_TYPE_PERMEDIA2V; + + xres = (info->var.xres + 31) & ~31; + pixclock = PICOS2KHZ(info->var.pixclock); + if (pixclock > PM2_MAX_PIXCLOCK) { + DPRINTK("pixclock too high (%uKHz)\n", pixclock); + return -EINVAL; + } + + hsstart = to3264(info->var.right_margin, depth, data64); + hsend = hsstart + to3264(info->var.hsync_len, depth, data64); + hbend = hsend + to3264(info->var.left_margin, depth, data64); + htotal = to3264(xres, depth, data64) + hbend - 1; + vsstart = (info->var.lower_margin) + ? info->var.lower_margin - 1 + : 0; /* FIXME! */ + vsend = info->var.lower_margin + info->var.vsync_len - 1; + vbend = info->var.lower_margin + info->var.vsync_len + info->var.upper_margin; + vtotal = info->var.yres + vbend - 1; + stride = to3264(width, depth, 1); + base = to3264(info->var.yoffset * xres + info->var.xoffset, depth, 1); + if (data64) + video |= PM2F_DATA_64_ENABLE; + + if (info->var.sync & FB_SYNC_HOR_HIGH_ACT) { + if (lowhsync) { + DPRINTK("ignoring +hsync, using -hsync.\n"); + video |= PM2F_HSYNC_ACT_LOW; + } else + video |= PM2F_HSYNC_ACT_HIGH; + } + else + video |= PM2F_HSYNC_ACT_LOW; + if (info->var.sync & FB_SYNC_VERT_HIGH_ACT) { + if (lowvsync) { + DPRINTK("ignoring +vsync, using -vsync.\n"); + video |= PM2F_VSYNC_ACT_LOW; + } else + video |= PM2F_VSYNC_ACT_HIGH; + } + else + video |= PM2F_VSYNC_ACT_LOW; + if ((info->var.vmode & FB_VMODE_MASK)==FB_VMODE_INTERLACED) { + DPRINTK("interlaced not supported\n"); + return -EINVAL; + } + if ((info->var.vmode & FB_VMODE_MASK)==FB_VMODE_DOUBLE) + video |= PM2F_LINE_DOUBLE; + if ((info->var.activate & FB_ACTIVATE_MASK)==FB_ACTIVATE_NOW) + video |= PM2F_VIDEO_ENABLE; + par->video = video; + + info->fix.visual = + (depth == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; + info->fix.line_length = info->var.xres * depth / 8; + info->cmap.len = 256; + + /* + * Settings calculated. Now write them out. + */ + if (par->type == PM2_TYPE_PERMEDIA2V) { + WAIT_FIFO(par, 1); + pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0); + } + + set_aperture(par, depth); + + mb(); + WAIT_FIFO(par, 19); + pm2_RDAC_WR(par, PM2I_RD_COLOR_KEY_CONTROL, + ( depth == 8 ) ? 0 : PM2F_COLOR_KEY_TEST_OFF); + switch (depth) { + case 8: + pm2_WR(par, PM2R_FB_READ_PIXEL, 0); + clrformat = 0x0e; + break; + case 16: + pm2_WR(par, PM2R_FB_READ_PIXEL, 1); + clrmode |= PM2F_RD_TRUECOLOR | PM2F_RD_PIXELFORMAT_RGB565; + txtmap = PM2F_TEXTEL_SIZE_16; + pixsize = 1; + clrformat = 0x70; + break; + case 32: + pm2_WR(par, PM2R_FB_READ_PIXEL, 2); + clrmode |= PM2F_RD_TRUECOLOR | PM2F_RD_PIXELFORMAT_RGBA8888; + txtmap = PM2F_TEXTEL_SIZE_32; + pixsize = 2; + clrformat = 0x20; + break; + case 24: + pm2_WR(par, PM2R_FB_READ_PIXEL, 4); + clrmode |= PM2F_RD_TRUECOLOR | PM2F_RD_PIXELFORMAT_RGB888; + txtmap = PM2F_TEXTEL_SIZE_24; + pixsize = 4; + clrformat = 0x20; + break; + } + pm2_WR(par, PM2R_FB_WRITE_MODE, PM2F_FB_WRITE_ENABLE); + pm2_WR(par, PM2R_FB_READ_MODE, partprod(xres)); + pm2_WR(par, PM2R_LB_READ_MODE, partprod(xres)); + pm2_WR(par, PM2R_TEXTURE_MAP_FORMAT, txtmap | partprod(xres)); + pm2_WR(par, PM2R_H_TOTAL, htotal); + pm2_WR(par, PM2R_HS_START, hsstart); + pm2_WR(par, PM2R_HS_END, hsend); + pm2_WR(par, PM2R_HG_END, hbend); + pm2_WR(par, PM2R_HB_END, hbend); + pm2_WR(par, PM2R_V_TOTAL, vtotal); + pm2_WR(par, PM2R_VS_START, vsstart); + pm2_WR(par, PM2R_VS_END, vsend); + pm2_WR(par, PM2R_VB_END, vbend); + pm2_WR(par, PM2R_SCREEN_STRIDE, stride); + wmb(); + pm2_WR(par, PM2R_WINDOW_ORIGIN, 0); + pm2_WR(par, PM2R_SCREEN_SIZE, (height << 16) | width); + pm2_WR(par, PM2R_SCISSOR_MODE, PM2F_SCREEN_SCISSOR_ENABLE); + wmb(); + pm2_WR(par, PM2R_SCREEN_BASE, base); + wmb(); + set_video(par, video); + WAIT_FIFO(par, 4); + switch (par->type) { + case PM2_TYPE_PERMEDIA2: + pm2_RDAC_WR(par, PM2I_RD_COLOR_MODE, clrmode); + break; + case PM2_TYPE_PERMEDIA2V: + pm2v_RDAC_WR(par, PM2VI_RD_PIXEL_SIZE, pixsize); + pm2v_RDAC_WR(par, PM2VI_RD_COLOR_FORMAT, clrformat); + break; + } + set_pixclock(par, pixclock); + DPRINTK("Setting graphics mode at %dx%d depth %d\n", + info->var.xres, info->var.yres, info->var.bits_per_pixel); + return 0; +} + +/** + * pm2fb_setcolreg - Sets a color register. + * @regno: boolean, 0 copy local, 1 get_user() function + * @red: frame buffer colormap structure + * @green: The green value which can be up to 16 bits wide + * @blue: The blue value which can be up to 16 bits wide. + * @transp: If supported the alpha value which can be up to 16 bits wide. + * @info: frame buffer info structure + * + * Set a single color register. The values supplied have a 16 bit + * magnitude which needs to be scaled in this function for the hardware. + * Pretty much a direct lift from tdfxfb.c. + * + * Returns negative errno on error, or zero on success. + */ +static int pm2fb_setcolreg(unsigned regno, unsigned red, unsigned green, + unsigned blue, unsigned transp, + struct fb_info *info) +{ + struct pm2fb_par *par = (struct pm2fb_par *) info->par; + + if (regno >= info->cmap.len) /* no. of hw registers */ + return 1; + /* + * Program hardware... do anything you want with transp + */ + + /* grayscale works only partially under directcolor */ + if (info->var.grayscale) { + /* grayscale = 0.30*R + 0.59*G + 0.11*B */ + red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; + } + + /* Directcolor: + * var->{color}.offset contains start of bitfield + * var->{color}.length contains length of bitfield + * {hardwarespecific} contains width of DAC + * cmap[X] is programmed to + * (X << red.offset) | (X << green.offset) | (X << blue.offset) + * RAMDAC[X] is programmed to (red, green, blue) + * + * Pseudocolor: + * uses offset = 0 && length = DAC register width. + * var->{color}.offset is 0 + * var->{color}.length contains widht of DAC + * cmap is not used + * DAC[X] is programmed to (red, green, blue) + * Truecolor: + * does not use RAMDAC (usually has 3 of them). + * var->{color}.offset contains start of bitfield + * var->{color}.length contains length of bitfield + * cmap is programmed to + * (red << red.offset) | (green << green.offset) | + * (blue << blue.offset) | (transp << transp.offset) + * RAMDAC does not exist + */ +#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16) + switch (info->fix.visual) { + case FB_VISUAL_TRUECOLOR: + case FB_VISUAL_PSEUDOCOLOR: + red = CNVT_TOHW(red, info->var.red.length); + green = CNVT_TOHW(green, info->var.green.length); + blue = CNVT_TOHW(blue, info->var.blue.length); + transp = CNVT_TOHW(transp, info->var.transp.length); + break; + case FB_VISUAL_DIRECTCOLOR: + /* example here assumes 8 bit DAC. Might be different + * for your hardware */ + red = CNVT_TOHW(red, 8); + green = CNVT_TOHW(green, 8); + blue = CNVT_TOHW(blue, 8); + /* hey, there is bug in transp handling... */ + transp = CNVT_TOHW(transp, 8); + break; + } +#undef CNVT_TOHW + /* Truecolor has hardware independent palette */ + if (info->fix.visual == FB_VISUAL_TRUECOLOR) { + u32 v; + + if (regno >= 16) + return 1; + + v = (red << info->var.red.offset) | + (green << info->var.green.offset) | + (blue << info->var.blue.offset) | + (transp << info->var.transp.offset); + + switch (info->var.bits_per_pixel) { + case 8: + break; + case 16: + case 24: + case 32: + ((u32*)(info->pseudo_palette))[regno] = v; + break; + } + return 0; + } + else if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR) + set_color(par, regno, red, green, blue); + + return 0; +} + +/** + * pm2fb_pan_display - Pans the display. + * @var: frame buffer variable screen structure + * @info: frame buffer structure that represents a single frame buffer + * + * Pan (or wrap, depending on the `vmode' field) the display using the + * `xoffset' and `yoffset' fields of the `var' structure. + * If the values don't fit, return -EINVAL. + * + * Returns negative errno on error, or zero on success. + * + */ +static int pm2fb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + struct pm2fb_par *p = (struct pm2fb_par *) info->par; + u32 base; + u32 depth; + u32 xres; + + xres = (var->xres + 31) & ~31; + depth = (var->bits_per_pixel + 7) & ~7; + depth = (depth > 32) ? 32 : depth; + base = to3264(var->yoffset * xres + var->xoffset, depth, 1); + WAIT_FIFO(p, 1); + pm2_WR(p, PM2R_SCREEN_BASE, base); + return 0; +} + +/** + * pm2fb_blank - Blanks the display. + * @blank_mode: the blank mode we want. + * @info: frame buffer structure that represents a single frame buffer + * + * Blank the screen if blank_mode != 0, else unblank. Return 0 if + * blanking succeeded, != 0 if un-/blanking failed due to e.g. a + * video mode which doesn't support it. Implements VESA suspend + * and powerdown modes on hardware that supports disabling hsync/vsync: + * blank_mode == 2: suspend vsync + * blank_mode == 3: suspend hsync + * blank_mode == 4: powerdown + * + * Returns negative errno on error, or zero on success. + * + */ +static int pm2fb_blank(int blank_mode, struct fb_info *info) +{ + struct pm2fb_par *par = (struct pm2fb_par *) info->par; + u32 video = par->video; + + DPRINTK("blank_mode %d\n", blank_mode); + + switch (blank_mode) { + case FB_BLANK_UNBLANK: + /* Screen: On */ + video |= PM2F_VIDEO_ENABLE; + break; + case FB_BLANK_NORMAL: + /* Screen: Off */ + video &= ~PM2F_VIDEO_ENABLE; + break; + case FB_BLANK_VSYNC_SUSPEND: + /* VSync: Off */ + video &= ~(PM2F_VSYNC_MASK | PM2F_BLANK_LOW ); + break; + case FB_BLANK_HSYNC_SUSPEND: + /* HSync: Off */ + video &= ~(PM2F_HSYNC_MASK | PM2F_BLANK_LOW ); + break; + case FB_BLANK_POWERDOWN: + /* HSync: Off, VSync: Off */ + video &= ~(PM2F_VSYNC_MASK | PM2F_HSYNC_MASK| PM2F_BLANK_LOW); + break; + } + set_video(par, video); + return 0; +} + +/* ------------ Hardware Independent Functions ------------ */ + +/* + * Frame buffer operations + */ + +static struct fb_ops pm2fb_ops = { + .owner = THIS_MODULE, + .fb_check_var = pm2fb_check_var, + .fb_set_par = pm2fb_set_par, + .fb_setcolreg = pm2fb_setcolreg, + .fb_blank = pm2fb_blank, + .fb_pan_display = pm2fb_pan_display, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_cursor = soft_cursor, +}; + +/* + * PCI stuff + */ + + +/** + * Device initialisation + * + * Initialise and allocate resource for PCI device. + * + * @param pdev PCI device. + * @param id PCI device ID. + */ +static int __devinit pm2fb_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct pm2fb_par *default_par; + struct fb_info *info; + int size, err; + int err_retval = -ENXIO; + + err = pci_enable_device(pdev); + if ( err ) { + printk(KERN_WARNING "pm2fb: Can't enable pdev: %d\n", err); + return err; + } + + size = sizeof(struct pm2fb_par) + 256 * sizeof(u32); + info = framebuffer_alloc(size, &pdev->dev); + if ( !info ) + return -ENOMEM; + default_par = (struct pm2fb_par *) info->par; + + switch (pdev->device) { + case PCI_DEVICE_ID_TI_TVP4020: + strcpy(pm2fb_fix.id, "TVP4020"); + default_par->type = PM2_TYPE_PERMEDIA2; + break; + case PCI_DEVICE_ID_3DLABS_PERMEDIA2: + strcpy(pm2fb_fix.id, "Permedia2"); + default_par->type = PM2_TYPE_PERMEDIA2; + break; + case PCI_DEVICE_ID_3DLABS_PERMEDIA2V: + strcpy(pm2fb_fix.id, "Permedia2v"); + default_par->type = PM2_TYPE_PERMEDIA2V; + break; + } + + pm2fb_fix.mmio_start = pci_resource_start(pdev, 0); + pm2fb_fix.mmio_len = PM2_REGS_SIZE; + +#if defined(__BIG_ENDIAN) + /* + * PM2 has a 64k register file, mapped twice in 128k. Lower + * map is little-endian, upper map is big-endian. + */ + pm2fb_fix.mmio_start += PM2_REGS_SIZE; + DPRINTK("Adjusting register base for big-endian.\n"); +#endif + DPRINTK("Register base at 0x%lx\n", pm2fb_fix.mmio_start); + + /* Registers - request region and map it. */ + if ( !request_mem_region(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len, + "pm2fb regbase") ) { + printk(KERN_WARNING "pm2fb: Can't reserve regbase.\n"); + goto err_exit_neither; + } + default_par->v_regs = + ioremap_nocache(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len); + if ( !default_par->v_regs ) { + printk(KERN_WARNING "pm2fb: Can't remap %s register area.\n", + pm2fb_fix.id); + release_mem_region(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len); + goto err_exit_neither; + } + + /* Stash away memory register info for use when we reset the board */ + default_par->mem_control = pm2_RD(default_par, PM2R_MEM_CONTROL); + default_par->boot_address = pm2_RD(default_par, PM2R_BOOT_ADDRESS); + default_par->mem_config = pm2_RD(default_par, PM2R_MEM_CONFIG); + DPRINTK("MemControl 0x%x BootAddress 0x%x MemConfig 0x%x\n", + default_par->mem_control, default_par->boot_address, + default_par->mem_config); + + /* Now work out how big lfb is going to be. */ + switch(default_par->mem_config & PM2F_MEM_CONFIG_RAM_MASK) { + case PM2F_MEM_BANKS_1: + default_par->fb_size=0x200000; + break; + case PM2F_MEM_BANKS_2: + default_par->fb_size=0x400000; + break; + case PM2F_MEM_BANKS_3: + default_par->fb_size=0x600000; + break; + case PM2F_MEM_BANKS_4: + default_par->fb_size=0x800000; + break; + } + default_par->memclock = CVPPC_MEMCLOCK; + pm2fb_fix.smem_start = pci_resource_start(pdev, 1); + pm2fb_fix.smem_len = default_par->fb_size; + + /* Linear frame buffer - request region and map it. */ + if ( !request_mem_region(pm2fb_fix.smem_start, pm2fb_fix.smem_len, + "pm2fb smem") ) { + printk(KERN_WARNING "pm2fb: Can't reserve smem.\n"); + goto err_exit_mmio; + } + info->screen_base = default_par->v_fb = + ioremap_nocache(pm2fb_fix.smem_start, pm2fb_fix.smem_len); + if ( !default_par->v_fb ) { + printk(KERN_WARNING "pm2fb: Can't ioremap smem area.\n"); + release_mem_region(pm2fb_fix.smem_start, pm2fb_fix.smem_len); + goto err_exit_mmio; + } + + info->fbops = &pm2fb_ops; + info->fix = pm2fb_fix; + info->pseudo_palette = (void *)(default_par + 1); + info->flags = FBINFO_DEFAULT | + FBINFO_HWACCEL_YPAN; + + if (!mode) + mode = "640x480@60"; + + err = fb_find_mode(&info->var, info, mode, NULL, 0, NULL, 8); + if (!err || err == 4) + info->var = pm2fb_var; + + if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) + goto err_exit_all; + + if (register_framebuffer(info) < 0) + goto err_exit_both; + + printk(KERN_INFO "fb%d: %s frame buffer device, memory = %dK.\n", + info->node, info->fix.id, default_par->fb_size / 1024); + + /* + * Our driver data + */ + pci_set_drvdata(pdev, info); + + return 0; + + err_exit_all: + fb_dealloc_cmap(&info->cmap); + err_exit_both: + iounmap(info->screen_base); + release_mem_region(pm2fb_fix.smem_start, pm2fb_fix.smem_len); + err_exit_mmio: + iounmap(default_par->v_regs); + release_mem_region(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len); + err_exit_neither: + framebuffer_release(info); + return err_retval; +} + +/** + * Device removal. + * + * Release all device resources. + * + * @param pdev PCI device to clean up. + */ +static void __devexit pm2fb_remove(struct pci_dev *pdev) +{ + struct fb_info* info = pci_get_drvdata(pdev); + struct fb_fix_screeninfo* fix = &info->fix; + struct pm2fb_par *par = info->par; + + unregister_framebuffer(info); + + iounmap(info->screen_base); + release_mem_region(fix->smem_start, fix->smem_len); + iounmap(par->v_regs); + release_mem_region(fix->mmio_start, fix->mmio_len); + + pci_set_drvdata(pdev, NULL); + kfree(info); +} + +static struct pci_device_id pm2fb_id_table[] = { + { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TVP4020, + PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16, + 0xff0000, 0 }, + { PCI_VENDOR_ID_3DLABS, PCI_DEVICE_ID_3DLABS_PERMEDIA2, + PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16, + 0xff0000, 0 }, + { PCI_VENDOR_ID_3DLABS, PCI_DEVICE_ID_3DLABS_PERMEDIA2V, + PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16, + 0xff0000, 0 }, + { 0, } +}; + +static struct pci_driver pm2fb_driver = { + .name = "pm2fb", + .id_table = pm2fb_id_table, + .probe = pm2fb_probe, + .remove = __devexit_p(pm2fb_remove), +}; + +MODULE_DEVICE_TABLE(pci, pm2fb_id_table); + + +#ifndef MODULE +/** + * Parse user speficied options. + * + * This is, comma-separated options following `video=pm2fb:'. + */ +static int __init pm2fb_setup(char *options) +{ + char* this_opt; + + if (!options || !*options) + return 0; + + while ((this_opt = strsep(&options, ",")) != NULL) { + if (!*this_opt) + continue; + if(!strcmp(this_opt, "lowhsync")) { + lowhsync = 1; + } else if(!strcmp(this_opt, "lowvsync")) { + lowvsync = 1; + } else { + mode = this_opt; + } + } + return 0; +} +#endif + + +static int __init pm2fb_init(void) +{ +#ifndef MODULE + char *option = NULL; + + if (fb_get_options("pm2fb", &option)) + return -ENODEV; + pm2fb_setup(option); +#endif + + return pci_register_driver(&pm2fb_driver); +} + +module_init(pm2fb_init); + +#ifdef MODULE +/* + * Cleanup + */ + +static void __exit pm2fb_exit(void) +{ + pci_unregister_driver(&pm2fb_driver); +} +#endif + +#ifdef MODULE +module_exit(pm2fb_exit); + +module_param(mode, charp, 0); +MODULE_PARM_DESC(mode, "Preferred video mode e.g. '648x480-8@60'"); +module_param(lowhsync, bool, 0); +MODULE_PARM_DESC(lowhsync, "Force horizontal sync low regardless of mode"); +module_param(lowvsync, bool, 0); +MODULE_PARM_DESC(lowvsync, "Force vertical sync low regardless of mode"); + +MODULE_AUTHOR("Jim Hague <jim.hague@acm.org>"); +MODULE_DESCRIPTION("Permedia2 framebuffer device driver"); +MODULE_LICENSE("GPL"); +#endif |
