diff options
Diffstat (limited to 'drivers/video/fbdev/cirrusfb.c')
| -rw-r--r-- | drivers/video/fbdev/cirrusfb.c | 2954 |
1 files changed, 2954 insertions, 0 deletions
diff --git a/drivers/video/fbdev/cirrusfb.c b/drivers/video/fbdev/cirrusfb.c new file mode 100644 index 000000000..72358d187 --- /dev/null +++ b/drivers/video/fbdev/cirrusfb.c @@ -0,0 +1,2954 @@ +/* + * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets + * + * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com> + * + * Contributors (thanks, all!) + * + * David Eger: + * Overhaul for Linux 2.6 + * + * Jeff Rugen: + * Major contributions; Motorola PowerStack (PPC and PCI) support, + * GD54xx, 1280x1024 mode support, change MCLK based on VCLK. + * + * Geert Uytterhoeven: + * Excellent code review. + * + * Lars Hecking: + * Amiga updates and testing. + * + * Original cirrusfb author: Frank Neumann + * + * Based on retz3fb.c and cirrusfb.c: + * Copyright (C) 1997 Jes Sorensen + * Copyright (C) 1996 Frank Neumann + * + *************************************************************** + * + * Format this code with GNU indent '-kr -i8 -pcs' options. + * + * 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/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <asm/pgtable.h> + +#ifdef CONFIG_ZORRO +#include <linux/zorro.h> +#endif +#ifdef CONFIG_PCI +#include <linux/pci.h> +#endif +#ifdef CONFIG_AMIGA +#include <asm/amigahw.h> +#endif + +#include <video/vga.h> +#include <video/cirrus.h> + +/***************************************************************** + * + * debugging and utility macros + * + */ + +/* disable runtime assertions? */ +/* #define CIRRUSFB_NDEBUG */ + +/* debugging assertions */ +#ifndef CIRRUSFB_NDEBUG +#define assert(expr) \ + if (!(expr)) { \ + printk("Assertion failed! %s,%s,%s,line=%d\n", \ + #expr, __FILE__, __func__, __LINE__); \ + } +#else +#define assert(expr) +#endif + +#define MB_ (1024 * 1024) + +/***************************************************************** + * + * chipset information + * + */ + +/* board types */ +enum cirrus_board { + BT_NONE = 0, + BT_SD64, /* GD5434 */ + BT_PICCOLO, /* GD5426 */ + BT_PICASSO, /* GD5426 or GD5428 */ + BT_SPECTRUM, /* GD5426 or GD5428 */ + BT_PICASSO4, /* GD5446 */ + BT_ALPINE, /* GD543x/4x */ + BT_GD5480, + BT_LAGUNA, /* GD5462/64 */ + BT_LAGUNAB, /* GD5465 */ +}; + +/* + * per-board-type information, used for enumerating and abstracting + * chip-specific information + * NOTE: MUST be in the same order as enum cirrus_board in order to + * use direct indexing on this array + * NOTE: '__initdata' cannot be used as some of this info + * is required at runtime. Maybe separate into an init-only and + * a run-time table? + */ +static const struct cirrusfb_board_info_rec { + char *name; /* ASCII name of chipset */ + long maxclock[5]; /* maximum video clock */ + /* for 1/4bpp, 8bpp 15/16bpp, 24bpp, 32bpp - numbers from xorg code */ + bool init_sr07 : 1; /* init SR07 during init_vgachip() */ + bool init_sr1f : 1; /* write SR1F during init_vgachip() */ + /* construct bit 19 of screen start address */ + bool scrn_start_bit19 : 1; + + /* initial SR07 value, then for each mode */ + unsigned char sr07; + unsigned char sr07_1bpp; + unsigned char sr07_1bpp_mux; + unsigned char sr07_8bpp; + unsigned char sr07_8bpp_mux; + + unsigned char sr1f; /* SR1F VGA initial register value */ +} cirrusfb_board_info[] = { + [BT_SD64] = { + .name = "CL SD64", + .maxclock = { + /* guess */ + /* the SD64/P4 have a higher max. videoclock */ + 135100, 135100, 85500, 85500, 0 + }, + .init_sr07 = true, + .init_sr1f = true, + .scrn_start_bit19 = true, + .sr07 = 0xF0, + .sr07_1bpp = 0xF0, + .sr07_1bpp_mux = 0xF6, + .sr07_8bpp = 0xF1, + .sr07_8bpp_mux = 0xF7, + .sr1f = 0x1E + }, + [BT_PICCOLO] = { + .name = "CL Piccolo", + .maxclock = { + /* guess */ + 90000, 90000, 90000, 90000, 90000 + }, + .init_sr07 = true, + .init_sr1f = true, + .scrn_start_bit19 = false, + .sr07 = 0x80, + .sr07_1bpp = 0x80, + .sr07_8bpp = 0x81, + .sr1f = 0x22 + }, + [BT_PICASSO] = { + .name = "CL Picasso", + .maxclock = { + /* guess */ + 90000, 90000, 90000, 90000, 90000 + }, + .init_sr07 = true, + .init_sr1f = true, + .scrn_start_bit19 = false, + .sr07 = 0x20, + .sr07_1bpp = 0x20, + .sr07_8bpp = 0x21, + .sr1f = 0x22 + }, + [BT_SPECTRUM] = { + .name = "CL Spectrum", + .maxclock = { + /* guess */ + 90000, 90000, 90000, 90000, 90000 + }, + .init_sr07 = true, + .init_sr1f = true, + .scrn_start_bit19 = false, + .sr07 = 0x80, + .sr07_1bpp = 0x80, + .sr07_8bpp = 0x81, + .sr1f = 0x22 + }, + [BT_PICASSO4] = { + .name = "CL Picasso4", + .maxclock = { + 135100, 135100, 85500, 85500, 0 + }, + .init_sr07 = true, + .init_sr1f = false, + .scrn_start_bit19 = true, + .sr07 = 0xA0, + .sr07_1bpp = 0xA0, + .sr07_1bpp_mux = 0xA6, + .sr07_8bpp = 0xA1, + .sr07_8bpp_mux = 0xA7, + .sr1f = 0 + }, + [BT_ALPINE] = { + .name = "CL Alpine", + .maxclock = { + /* for the GD5430. GD5446 can do more... */ + 85500, 85500, 50000, 28500, 0 + }, + .init_sr07 = true, + .init_sr1f = true, + .scrn_start_bit19 = true, + .sr07 = 0xA0, + .sr07_1bpp = 0xA0, + .sr07_1bpp_mux = 0xA6, + .sr07_8bpp = 0xA1, + .sr07_8bpp_mux = 0xA7, + .sr1f = 0x1C + }, + [BT_GD5480] = { + .name = "CL GD5480", + .maxclock = { + 135100, 200000, 200000, 135100, 135100 + }, + .init_sr07 = true, + .init_sr1f = true, + .scrn_start_bit19 = true, + .sr07 = 0x10, + .sr07_1bpp = 0x11, + .sr07_8bpp = 0x11, + .sr1f = 0x1C + }, + [BT_LAGUNA] = { + .name = "CL Laguna", + .maxclock = { + /* taken from X11 code */ + 170000, 170000, 170000, 170000, 135100, + }, + .init_sr07 = false, + .init_sr1f = false, + .scrn_start_bit19 = true, + }, + [BT_LAGUNAB] = { + .name = "CL Laguna AGP", + .maxclock = { + /* taken from X11 code */ + 170000, 250000, 170000, 170000, 135100, + }, + .init_sr07 = false, + .init_sr1f = false, + .scrn_start_bit19 = true, + } +}; + +#ifdef CONFIG_PCI +#define CHIP(id, btype) \ + { PCI_VENDOR_ID_CIRRUS, id, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (btype) } + +static struct pci_device_id cirrusfb_pci_table[] = { + CHIP(PCI_DEVICE_ID_CIRRUS_5436, BT_ALPINE), + CHIP(PCI_DEVICE_ID_CIRRUS_5434_8, BT_SD64), + CHIP(PCI_DEVICE_ID_CIRRUS_5434_4, BT_SD64), + CHIP(PCI_DEVICE_ID_CIRRUS_5430, BT_ALPINE), /* GD-5440 is same id */ + CHIP(PCI_DEVICE_ID_CIRRUS_7543, BT_ALPINE), + CHIP(PCI_DEVICE_ID_CIRRUS_7548, BT_ALPINE), + CHIP(PCI_DEVICE_ID_CIRRUS_5480, BT_GD5480), /* MacPicasso likely */ + CHIP(PCI_DEVICE_ID_CIRRUS_5446, BT_PICASSO4), /* Picasso 4 is 5446 */ + CHIP(PCI_DEVICE_ID_CIRRUS_5462, BT_LAGUNA), /* CL Laguna */ + CHIP(PCI_DEVICE_ID_CIRRUS_5464, BT_LAGUNA), /* CL Laguna 3D */ + CHIP(PCI_DEVICE_ID_CIRRUS_5465, BT_LAGUNAB), /* CL Laguna 3DA*/ + { 0, } +}; +MODULE_DEVICE_TABLE(pci, cirrusfb_pci_table); +#undef CHIP +#endif /* CONFIG_PCI */ + +#ifdef CONFIG_ZORRO +struct zorrocl { + enum cirrus_board type; /* Board type */ + u32 regoffset; /* Offset of registers in first Zorro device */ + u32 ramsize; /* Size of video RAM in first Zorro device */ + /* If zero, use autoprobe on RAM device */ + u32 ramoffset; /* Offset of video RAM in first Zorro device */ + zorro_id ramid; /* Zorro ID of RAM device */ + zorro_id ramid2; /* Zorro ID of optional second RAM device */ +}; + +static const struct zorrocl zcl_sd64 = { + .type = BT_SD64, + .ramid = ZORRO_PROD_HELFRICH_SD64_RAM, +}; + +static const struct zorrocl zcl_piccolo = { + .type = BT_PICCOLO, + .ramid = ZORRO_PROD_HELFRICH_PICCOLO_RAM, +}; + +static const struct zorrocl zcl_picasso = { + .type = BT_PICASSO, + .ramid = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_RAM, +}; + +static const struct zorrocl zcl_spectrum = { + .type = BT_SPECTRUM, + .ramid = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_RAM, +}; + +static const struct zorrocl zcl_picasso4_z3 = { + .type = BT_PICASSO4, + .regoffset = 0x00600000, + .ramsize = 4 * MB_, + .ramoffset = 0x01000000, /* 0x02000000 for 64 MiB boards */ +}; + +static const struct zorrocl zcl_picasso4_z2 = { + .type = BT_PICASSO4, + .regoffset = 0x10000, + .ramid = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z2_RAM1, + .ramid2 = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z2_RAM2, +}; + + +static const struct zorro_device_id cirrusfb_zorro_table[] = { + { + .id = ZORRO_PROD_HELFRICH_SD64_REG, + .driver_data = (unsigned long)&zcl_sd64, + }, { + .id = ZORRO_PROD_HELFRICH_PICCOLO_REG, + .driver_data = (unsigned long)&zcl_piccolo, + }, { + .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_REG, + .driver_data = (unsigned long)&zcl_picasso, + }, { + .id = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_REG, + .driver_data = (unsigned long)&zcl_spectrum, + }, { + .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z3, + .driver_data = (unsigned long)&zcl_picasso4_z3, + }, { + .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z2_REG, + .driver_data = (unsigned long)&zcl_picasso4_z2, + }, + { 0 } +}; +MODULE_DEVICE_TABLE(zorro, cirrusfb_zorro_table); +#endif /* CONFIG_ZORRO */ + +#ifdef CIRRUSFB_DEBUG +enum cirrusfb_dbg_reg_class { + CRT, + SEQ +}; +#endif /* CIRRUSFB_DEBUG */ + +/* info about board */ +struct cirrusfb_info { + u8 __iomem *regbase; + u8 __iomem *laguna_mmio; + enum cirrus_board btype; + unsigned char SFR; /* Shadow of special function register */ + + int multiplexing; + int doubleVCLK; + int blank_mode; + u32 pseudo_palette[16]; + + void (*unmap)(struct fb_info *info); +}; + +static bool noaccel; +static char *mode_option = "640x480@60"; + +/****************************************************************************/ +/**** BEGIN PROTOTYPES ******************************************************/ + +/*--- Interface used by the world ------------------------------------------*/ +static int cirrusfb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info); + +/*--- Internal routines ----------------------------------------------------*/ +static void init_vgachip(struct fb_info *info); +static void switch_monitor(struct cirrusfb_info *cinfo, int on); +static void WGen(const struct cirrusfb_info *cinfo, + int regnum, unsigned char val); +static unsigned char RGen(const struct cirrusfb_info *cinfo, int regnum); +static void AttrOn(const struct cirrusfb_info *cinfo); +static void WHDR(const struct cirrusfb_info *cinfo, unsigned char val); +static void WSFR(struct cirrusfb_info *cinfo, unsigned char val); +static void WSFR2(struct cirrusfb_info *cinfo, unsigned char val); +static void WClut(struct cirrusfb_info *cinfo, unsigned char regnum, + unsigned char red, unsigned char green, unsigned char blue); +#if 0 +static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum, + unsigned char *red, unsigned char *green, + unsigned char *blue); +#endif +static void cirrusfb_WaitBLT(u8 __iomem *regbase); +static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel, + u_short curx, u_short cury, + u_short destx, u_short desty, + u_short width, u_short height, + u_short line_length); +static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel, + u_short x, u_short y, + u_short width, u_short height, + u32 fg_color, u32 bg_color, + u_short line_length, u_char blitmode); + +static void bestclock(long freq, int *nom, int *den, int *div); + +#ifdef CIRRUSFB_DEBUG +static void cirrusfb_dbg_reg_dump(struct fb_info *info, caddr_t regbase); +static void cirrusfb_dbg_print_regs(struct fb_info *info, + caddr_t regbase, + enum cirrusfb_dbg_reg_class reg_class, ...); +#endif /* CIRRUSFB_DEBUG */ + +/*** END PROTOTYPES ********************************************************/ +/*****************************************************************************/ +/*** BEGIN Interface Used by the World ***************************************/ + +static inline int is_laguna(const struct cirrusfb_info *cinfo) +{ + return cinfo->btype == BT_LAGUNA || cinfo->btype == BT_LAGUNAB; +} + +static int opencount; + +/*--- Open /dev/fbx ---------------------------------------------------------*/ +static int cirrusfb_open(struct fb_info *info, int user) +{ + if (opencount++ == 0) + switch_monitor(info->par, 1); + return 0; +} + +/*--- Close /dev/fbx --------------------------------------------------------*/ +static int cirrusfb_release(struct fb_info *info, int user) +{ + if (--opencount == 0) + switch_monitor(info->par, 0); + return 0; +} + +/**** END Interface used by the World *************************************/ +/****************************************************************************/ +/**** BEGIN Hardware specific Routines **************************************/ + +/* Check if the MCLK is not a better clock source */ +static int cirrusfb_check_mclk(struct fb_info *info, long freq) +{ + struct cirrusfb_info *cinfo = info->par; + long mclk = vga_rseq(cinfo->regbase, CL_SEQR1F) & 0x3f; + + /* Read MCLK value */ + mclk = (14318 * mclk) >> 3; + dev_dbg(info->device, "Read MCLK of %ld kHz\n", mclk); + + /* Determine if we should use MCLK instead of VCLK, and if so, what we + * should divide it by to get VCLK + */ + + if (abs(freq - mclk) < 250) { + dev_dbg(info->device, "Using VCLK = MCLK\n"); + return 1; + } else if (abs(freq - (mclk / 2)) < 250) { + dev_dbg(info->device, "Using VCLK = MCLK/2\n"); + return 2; + } + + return 0; +} + +static int cirrusfb_check_pixclock(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + long freq; + long maxclock; + struct cirrusfb_info *cinfo = info->par; + unsigned maxclockidx = var->bits_per_pixel >> 3; + + /* convert from ps to kHz */ + freq = PICOS2KHZ(var->pixclock ? : 1); + + maxclock = cirrusfb_board_info[cinfo->btype].maxclock[maxclockidx]; + cinfo->multiplexing = 0; + + /* If the frequency is greater than we can support, we might be able + * to use multiplexing for the video mode */ + if (freq > maxclock) { + var->pixclock = KHZ2PICOS(maxclock); + + while ((freq = PICOS2KHZ(var->pixclock)) > maxclock) + var->pixclock++; + } + dev_dbg(info->device, "desired pixclock: %ld kHz\n", freq); + + /* + * Additional constraint: 8bpp uses DAC clock doubling to allow maximum + * pixel clock + */ + if (var->bits_per_pixel == 8) { + switch (cinfo->btype) { + case BT_ALPINE: + case BT_SD64: + case BT_PICASSO4: + if (freq > 85500) + cinfo->multiplexing = 1; + break; + case BT_GD5480: + if (freq > 135100) + cinfo->multiplexing = 1; + break; + + default: + break; + } + } + + /* If we have a 1MB 5434, we need to put ourselves in a mode where + * the VCLK is double the pixel clock. */ + cinfo->doubleVCLK = 0; + if (cinfo->btype == BT_SD64 && info->fix.smem_len <= MB_ && + var->bits_per_pixel == 16) { + cinfo->doubleVCLK = 1; + } + + return 0; +} + +static int cirrusfb_check_var(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + int yres; + /* memory size in pixels */ + unsigned pixels = info->screen_size * 8 / var->bits_per_pixel; + struct cirrusfb_info *cinfo = info->par; + + switch (var->bits_per_pixel) { + case 1: + var->red.offset = 0; + var->red.length = 1; + var->green = var->red; + var->blue = var->red; + break; + + case 8: + var->red.offset = 0; + var->red.length = 8; + var->green = var->red; + var->blue = var->red; + break; + + case 16: + var->red.offset = 11; + var->green.offset = 5; + var->blue.offset = 0; + var->red.length = 5; + var->green.length = 6; + var->blue.length = 5; + break; + + case 24: + var->red.offset = 16; + var->green.offset = 8; + var->blue.offset = 0; + var->red.length = 8; + var->green.length = 8; + var->blue.length = 8; + break; + + default: + dev_dbg(info->device, + "Unsupported bpp size: %d\n", var->bits_per_pixel); + return -EINVAL; + } + + if (var->xres_virtual < var->xres) + var->xres_virtual = var->xres; + /* use highest possible virtual resolution */ + if (var->yres_virtual == -1) { + var->yres_virtual = pixels / var->xres_virtual; + + dev_info(info->device, + "virtual resolution set to maximum of %dx%d\n", + var->xres_virtual, var->yres_virtual); + } + if (var->yres_virtual < var->yres) + var->yres_virtual = var->yres; + + if (var->xres_virtual * var->yres_virtual > pixels) { + dev_err(info->device, "mode %dx%dx%d rejected... " + "virtual resolution too high to fit into video memory!\n", + var->xres_virtual, var->yres_virtual, + var->bits_per_pixel); + return -EINVAL; + } + + /* truncate xoffset and yoffset to maximum if too high */ + if (var->xoffset > var->xres_virtual - var->xres) + var->xoffset = var->xres_virtual - var->xres - 1; + if (var->yoffset > var->yres_virtual - var->yres) + var->yoffset = var->yres_virtual - var->yres - 1; + + var->red.msb_right = + var->green.msb_right = + var->blue.msb_right = + var->transp.offset = + var->transp.length = + var->transp.msb_right = 0; + + yres = var->yres; + if (var->vmode & FB_VMODE_DOUBLE) + yres *= 2; + else if (var->vmode & FB_VMODE_INTERLACED) + yres = (yres + 1) / 2; + + if (yres >= 1280) { + dev_err(info->device, "ERROR: VerticalTotal >= 1280; " + "special treatment required! (TODO)\n"); + return -EINVAL; + } + + if (cirrusfb_check_pixclock(var, info)) + return -EINVAL; + + if (!is_laguna(cinfo)) + var->accel_flags = FB_ACCELF_TEXT; + + return 0; +} + +static void cirrusfb_set_mclk_as_source(const struct fb_info *info, int div) +{ + struct cirrusfb_info *cinfo = info->par; + unsigned char old1f, old1e; + + assert(cinfo != NULL); + old1f = vga_rseq(cinfo->regbase, CL_SEQR1F) & ~0x40; + + if (div) { + dev_dbg(info->device, "Set %s as pixclock source.\n", + (div == 2) ? "MCLK/2" : "MCLK"); + old1f |= 0x40; + old1e = vga_rseq(cinfo->regbase, CL_SEQR1E) & ~0x1; + if (div == 2) + old1e |= 1; + + vga_wseq(cinfo->regbase, CL_SEQR1E, old1e); + } + vga_wseq(cinfo->regbase, CL_SEQR1F, old1f); +} + +/************************************************************************* + cirrusfb_set_par_foo() + + actually writes the values for a new video mode into the hardware, +**************************************************************************/ +static int cirrusfb_set_par_foo(struct fb_info *info) +{ + struct cirrusfb_info *cinfo = info->par; + struct fb_var_screeninfo *var = &info->var; + u8 __iomem *regbase = cinfo->regbase; + unsigned char tmp; + int pitch; + const struct cirrusfb_board_info_rec *bi; + int hdispend, hsyncstart, hsyncend, htotal; + int yres, vdispend, vsyncstart, vsyncend, vtotal; + long freq; + int nom, den, div; + unsigned int control = 0, format = 0, threshold = 0; + + dev_dbg(info->device, "Requested mode: %dx%dx%d\n", + var->xres, var->yres, var->bits_per_pixel); + + switch (var->bits_per_pixel) { + case 1: + info->fix.line_length = var->xres_virtual / 8; + info->fix.visual = FB_VISUAL_MONO10; + break; + + case 8: + info->fix.line_length = var->xres_virtual; + info->fix.visual = FB_VISUAL_PSEUDOCOLOR; + break; + + case 16: + case 24: + info->fix.line_length = var->xres_virtual * + var->bits_per_pixel >> 3; + info->fix.visual = FB_VISUAL_TRUECOLOR; + break; + } + info->fix.type = FB_TYPE_PACKED_PIXELS; + + init_vgachip(info); + + bi = &cirrusfb_board_info[cinfo->btype]; + + hsyncstart = var->xres + var->right_margin; + hsyncend = hsyncstart + var->hsync_len; + htotal = (hsyncend + var->left_margin) / 8; + hdispend = var->xres / 8; + hsyncstart = hsyncstart / 8; + hsyncend = hsyncend / 8; + + vdispend = var->yres; + vsyncstart = vdispend + var->lower_margin; + vsyncend = vsyncstart + var->vsync_len; + vtotal = vsyncend + var->upper_margin; + + if (var->vmode & FB_VMODE_DOUBLE) { + vdispend *= 2; + vsyncstart *= 2; + vsyncend *= 2; + vtotal *= 2; + } else if (var->vmode & FB_VMODE_INTERLACED) { + vdispend = (vdispend + 1) / 2; + vsyncstart = (vsyncstart + 1) / 2; + vsyncend = (vsyncend + 1) / 2; + vtotal = (vtotal + 1) / 2; + } + yres = vdispend; + if (yres >= 1024) { + vtotal /= 2; + vsyncstart /= 2; + vsyncend /= 2; + vdispend /= 2; + } + + vdispend -= 1; + vsyncstart -= 1; + vsyncend -= 1; + vtotal -= 2; + + if (cinfo->multiplexing) { + htotal /= 2; + hsyncstart /= 2; + hsyncend /= 2; + hdispend /= 2; + } + + htotal -= 5; + hdispend -= 1; + hsyncstart += 1; + hsyncend += 1; + + /* unlock register VGA_CRTC_H_TOTAL..CRT7 */ + vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, 0x20); /* previously: 0x00) */ + + /* if debugging is enabled, all parameters get output before writing */ + dev_dbg(info->device, "CRT0: %d\n", htotal); + vga_wcrt(regbase, VGA_CRTC_H_TOTAL, htotal); + + dev_dbg(info->device, "CRT1: %d\n", hdispend); + vga_wcrt(regbase, VGA_CRTC_H_DISP, hdispend); + + dev_dbg(info->device, "CRT2: %d\n", var->xres / 8); + vga_wcrt(regbase, VGA_CRTC_H_BLANK_START, var->xres / 8); + + /* + 128: Compatible read */ + dev_dbg(info->device, "CRT3: 128+%d\n", (htotal + 5) % 32); + vga_wcrt(regbase, VGA_CRTC_H_BLANK_END, + 128 + ((htotal + 5) % 32)); + + dev_dbg(info->device, "CRT4: %d\n", hsyncstart); + vga_wcrt(regbase, VGA_CRTC_H_SYNC_START, hsyncstart); + + tmp = hsyncend % 32; + if ((htotal + 5) & 32) + tmp += 128; + dev_dbg(info->device, "CRT5: %d\n", tmp); + vga_wcrt(regbase, VGA_CRTC_H_SYNC_END, tmp); + + dev_dbg(info->device, "CRT6: %d\n", vtotal & 0xff); + vga_wcrt(regbase, VGA_CRTC_V_TOTAL, vtotal & 0xff); + + tmp = 16; /* LineCompare bit #9 */ + if (vtotal & 256) + tmp |= 1; + if (vdispend & 256) + tmp |= 2; + if (vsyncstart & 256) + tmp |= 4; + if ((vdispend + 1) & 256) + tmp |= 8; + if (vtotal & 512) + tmp |= 32; + if (vdispend & 512) + tmp |= 64; + if (vsyncstart & 512) + tmp |= 128; + dev_dbg(info->device, "CRT7: %d\n", tmp); + vga_wcrt(regbase, VGA_CRTC_OVERFLOW, tmp); + + tmp = 0x40; /* LineCompare bit #8 */ + if ((vdispend + 1) & 512) + tmp |= 0x20; + if (var->vmode & FB_VMODE_DOUBLE) + tmp |= 0x80; + dev_dbg(info->device, "CRT9: %d\n", tmp); + vga_wcrt(regbase, VGA_CRTC_MAX_SCAN, tmp); + + dev_dbg(info->device, "CRT10: %d\n", vsyncstart & 0xff); + vga_wcrt(regbase, VGA_CRTC_V_SYNC_START, vsyncstart & 0xff); + + dev_dbg(info->device, "CRT11: 64+32+%d\n", vsyncend % 16); + vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, vsyncend % 16 + 64 + 32); + + dev_dbg(info->device, "CRT12: %d\n", vdispend & 0xff); + vga_wcrt(regbase, VGA_CRTC_V_DISP_END, vdispend & 0xff); + + dev_dbg(info->device, "CRT15: %d\n", (vdispend + 1) & 0xff); + vga_wcrt(regbase, VGA_CRTC_V_BLANK_START, (vdispend + 1) & 0xff); + + dev_dbg(info->device, "CRT16: %d\n", vtotal & 0xff); + vga_wcrt(regbase, VGA_CRTC_V_BLANK_END, vtotal & 0xff); + + dev_dbg(info->device, "CRT18: 0xff\n"); + vga_wcrt(regbase, VGA_CRTC_LINE_COMPARE, 0xff); + + tmp = 0; + if (var->vmode & FB_VMODE_INTERLACED) + tmp |= 1; + if ((htotal + 5) & 64) + tmp |= 16; + if ((htotal + 5) & 128) + tmp |= 32; + if (vtotal & 256) + tmp |= 64; + if (vtotal & 512) + tmp |= 128; + + dev_dbg(info->device, "CRT1a: %d\n", tmp); + vga_wcrt(regbase, CL_CRT1A, tmp); + + freq = PICOS2KHZ(var->pixclock); + if (var->bits_per_pixel == 24) + if (cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64) + freq *= 3; + if (cinfo->multiplexing) + freq /= 2; + if (cinfo->doubleVCLK) + freq *= 2; + + bestclock(freq, &nom, &den, &div); + + dev_dbg(info->device, "VCLK freq: %ld kHz nom: %d den: %d div: %d\n", + freq, nom, den, div); + + /* set VCLK0 */ + /* hardware RefClock: 14.31818 MHz */ + /* formula: VClk = (OSC * N) / (D * (1+P)) */ + /* Example: VClk = (14.31818 * 91) / (23 * (1+1)) = 28.325 MHz */ + + if (cinfo->btype == BT_ALPINE || cinfo->btype == BT_PICASSO4 || + cinfo->btype == BT_SD64) { + /* if freq is close to mclk or mclk/2 select mclk + * as clock source + */ + int divMCLK = cirrusfb_check_mclk(info, freq); + if (divMCLK) + nom = 0; + cirrusfb_set_mclk_as_source(info, divMCLK); + } + if (is_laguna(cinfo)) { + long pcifc = fb_readl(cinfo->laguna_mmio + 0x3fc); + unsigned char tile = fb_readb(cinfo->laguna_mmio + 0x407); + unsigned short tile_control; + + if (cinfo->btype == BT_LAGUNAB) { + tile_control = fb_readw(cinfo->laguna_mmio + 0x2c4); + tile_control &= ~0x80; + fb_writew(tile_control, cinfo->laguna_mmio + 0x2c4); + } + + fb_writel(pcifc | 0x10000000l, cinfo->laguna_mmio + 0x3fc); + fb_writeb(tile & 0x3f, cinfo->laguna_mmio + 0x407); + control = fb_readw(cinfo->laguna_mmio + 0x402); + threshold = fb_readw(cinfo->laguna_mmio + 0xea); + control &= ~0x6800; + format = 0; + threshold &= 0xffc0 & 0x3fbf; + } + if (nom) { + tmp = den << 1; + if (div != 0) + tmp |= 1; + /* 6 bit denom; ONLY 5434!!! (bugged me 10 days) */ + if ((cinfo->btype == BT_SD64) || + (cinfo->btype == BT_ALPINE) || + (cinfo->btype == BT_GD5480)) + tmp |= 0x80; + + /* Laguna chipset has reversed clock registers */ + if (is_laguna(cinfo)) { + vga_wseq(regbase, CL_SEQRE, tmp); + vga_wseq(regbase, CL_SEQR1E, nom); + } else { + vga_wseq(regbase, CL_SEQRE, nom); + vga_wseq(regbase, CL_SEQR1E, tmp); + } + } + + if (yres >= 1024) + /* 1280x1024 */ + vga_wcrt(regbase, VGA_CRTC_MODE, 0xc7); + else + /* mode control: VGA_CRTC_START_HI enable, ROTATE(?), 16bit + * address wrap, no compat. */ + vga_wcrt(regbase, VGA_CRTC_MODE, 0xc3); + + /* don't know if it would hurt to also program this if no interlaced */ + /* mode is used, but I feel better this way.. :-) */ + if (var->vmode & FB_VMODE_INTERLACED) + vga_wcrt(regbase, VGA_CRTC_REGS, htotal / 2); + else + vga_wcrt(regbase, VGA_CRTC_REGS, 0x00); /* interlace control */ + + /* adjust horizontal/vertical sync type (low/high), use VCLK3 */ + /* enable display memory & CRTC I/O address for color mode */ + tmp = 0x03 | 0xc; + if (var->sync & FB_SYNC_HOR_HIGH_ACT) + tmp |= 0x40; + if (var->sync & FB_SYNC_VERT_HIGH_ACT) + tmp |= 0x80; + WGen(cinfo, VGA_MIS_W, tmp); + + /* text cursor on and start line */ + vga_wcrt(regbase, VGA_CRTC_CURSOR_START, 0); + /* text cursor end line */ + vga_wcrt(regbase, VGA_CRTC_CURSOR_END, 31); + + /****************************************************** + * + * 1 bpp + * + */ + + /* programming for different color depths */ + if (var->bits_per_pixel == 1) { + dev_dbg(info->device, "preparing for 1 bit deep display\n"); + vga_wgfx(regbase, VGA_GFX_MODE, 0); /* mode register */ + + /* SR07 */ + switch (cinfo->btype) { + case BT_SD64: + case BT_PICCOLO: + case BT_PICASSO: + case BT_SPECTRUM: + case BT_PICASSO4: + case BT_ALPINE: + case BT_GD5480: + vga_wseq(regbase, CL_SEQR7, + cinfo->multiplexing ? + bi->sr07_1bpp_mux : bi->sr07_1bpp); + break; + + case BT_LAGUNA: + case BT_LAGUNAB: + vga_wseq(regbase, CL_SEQR7, + vga_rseq(regbase, CL_SEQR7) & ~0x01); + break; + + default: + dev_warn(info->device, "unknown Board\n"); + break; + } + + /* Extended Sequencer Mode */ + switch (cinfo->btype) { + + case BT_PICCOLO: + case BT_SPECTRUM: + /* evtl d0 bei 1 bit? avoid FIFO underruns..? */ + vga_wseq(regbase, CL_SEQRF, 0xb0); + break; + + case BT_PICASSO: + /* ## vorher d0 avoid FIFO underruns..? */ + vga_wseq(regbase, CL_SEQRF, 0xd0); + break; + + case BT_SD64: + case BT_PICASSO4: + case BT_ALPINE: + case BT_GD5480: + case BT_LAGUNA: + case BT_LAGUNAB: + /* do nothing */ + break; + + default: + dev_warn(info->device, "unknown Board\n"); + break; + } + + /* pixel mask: pass-through for first plane */ + WGen(cinfo, VGA_PEL_MSK, 0x01); + if (cinfo->multiplexing) + /* hidden dac reg: 1280x1024 */ + WHDR(cinfo, 0x4a); + else + /* hidden dac: nothing */ + WHDR(cinfo, 0); + /* memory mode: odd/even, ext. memory */ + vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x06); + /* plane mask: only write to first plane */ + vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0x01); + } + + /****************************************************** + * + * 8 bpp + * + */ + + else if (var->bits_per_pixel == 8) { + dev_dbg(info->device, "preparing for 8 bit deep display\n"); + switch (cinfo->btype) { + case BT_SD64: + case BT_PICCOLO: + case BT_PICASSO: + case BT_SPECTRUM: + case BT_PICASSO4: + case BT_ALPINE: + case BT_GD5480: + vga_wseq(regbase, CL_SEQR7, + cinfo->multiplexing ? + bi->sr07_8bpp_mux : bi->sr07_8bpp); + break; + + case BT_LAGUNA: + case BT_LAGUNAB: + vga_wseq(regbase, CL_SEQR7, + vga_rseq(regbase, CL_SEQR7) | 0x01); + threshold |= 0x10; + break; + + default: + dev_warn(info->device, "unknown Board\n"); + break; + } + + switch (cinfo->btype) { + case BT_PICCOLO: + case BT_PICASSO: + case BT_SPECTRUM: + /* Fast Page-Mode writes */ + vga_wseq(regbase, CL_SEQRF, 0xb0); + break; + + case BT_PICASSO4: +#ifdef CONFIG_ZORRO + /* ### INCOMPLETE!! */ + vga_wseq(regbase, CL_SEQRF, 0xb8); +#endif + case BT_ALPINE: + case BT_SD64: + case BT_GD5480: + case BT_LAGUNA: + case BT_LAGUNAB: + /* do nothing */ + break; + + default: + dev_warn(info->device, "unknown board\n"); + break; + } + + /* mode register: 256 color mode */ + vga_wgfx(regbase, VGA_GFX_MODE, 64); + if (cinfo->multiplexing) + /* hidden dac reg: 1280x1024 */ + WHDR(cinfo, 0x4a); + else + /* hidden dac: nothing */ + WHDR(cinfo, 0); + } + + /****************************************************** + * + * 16 bpp + * + */ + + else if (var->bits_per_pixel == 16) { + dev_dbg(info->device, "preparing for 16 bit deep display\n"); + switch (cinfo->btype) { + case BT_PICCOLO: + case BT_SPECTRUM: + vga_wseq(regbase, CL_SEQR7, 0x87); + /* Fast Page-Mode writes */ + vga_wseq(regbase, CL_SEQRF, 0xb0); + break; + + case BT_PICASSO: + vga_wseq(regbase, CL_SEQR7, 0x27); + /* Fast Page-Mode writes */ + vga_wseq(regbase, CL_SEQRF, 0xb0); + break; + + case BT_SD64: + case BT_PICASSO4: + case BT_ALPINE: + /* Extended Sequencer Mode: 256c col. mode */ + vga_wseq(regbase, CL_SEQR7, + cinfo->doubleVCLK ? 0xa3 : 0xa7); + break; + + case BT_GD5480: + vga_wseq(regbase, CL_SEQR7, 0x17); + /* We already set SRF and SR1F */ + break; + + case BT_LAGUNA: + case BT_LAGUNAB: + vga_wseq(regbase, CL_SEQR7, + vga_rseq(regbase, CL_SEQR7) & ~0x01); + control |= 0x2000; + format |= 0x1400; + threshold |= 0x10; + break; + + default: + dev_warn(info->device, "unknown Board\n"); + break; + } + + /* mode register: 256 color mode */ + vga_wgfx(regbase, VGA_GFX_MODE, 64); +#ifdef CONFIG_PCI + WHDR(cinfo, cinfo->doubleVCLK ? 0xe1 : 0xc1); +#elif defined(CONFIG_ZORRO) + /* FIXME: CONFIG_PCI and CONFIG_ZORRO may be defined both */ + WHDR(cinfo, 0xa0); /* hidden dac reg: nothing special */ +#endif + } + + /****************************************************** + * + * 24 bpp + * + */ + + else if (var->bits_per_pixel == 24) { + dev_dbg(info->device, "preparing for 24 bit deep display\n"); + switch (cinfo->btype) { + case BT_PICCOLO: + case BT_SPECTRUM: + vga_wseq(regbase, CL_SEQR7, 0x85); + /* Fast Page-Mode writes */ + vga_wseq(regbase, CL_SEQRF, 0xb0); + break; + + case BT_PICASSO: + vga_wseq(regbase, CL_SEQR7, 0x25); + /* Fast Page-Mode writes */ + vga_wseq(regbase, CL_SEQRF, 0xb0); + break; + + case BT_SD64: + case BT_PICASSO4: + case BT_ALPINE: + /* Extended Sequencer Mode: 256c col. mode */ + vga_wseq(regbase, CL_SEQR7, 0xa5); + break; + + case BT_GD5480: + vga_wseq(regbase, CL_SEQR7, 0x15); + /* We already set SRF and SR1F */ + break; + + case BT_LAGUNA: + case BT_LAGUNAB: + vga_wseq(regbase, CL_SEQR7, + vga_rseq(regbase, CL_SEQR7) & ~0x01); + control |= 0x4000; + format |= 0x2400; + threshold |= 0x20; + break; + + default: + dev_warn(info->device, "unknown Board\n"); + break; + } + + /* mode register: 256 color mode */ + vga_wgfx(regbase, VGA_GFX_MODE, 64); + /* hidden dac reg: 8-8-8 mode (24 or 32) */ + WHDR(cinfo, 0xc5); + } + + /****************************************************** + * + * unknown/unsupported bpp + * + */ + + else + dev_err(info->device, + "What's this? requested color depth == %d.\n", + var->bits_per_pixel); + + pitch = info->fix.line_length >> 3; + vga_wcrt(regbase, VGA_CRTC_OFFSET, pitch & 0xff); + tmp = 0x22; + if (pitch & 0x100) + tmp |= 0x10; /* offset overflow bit */ + + /* screen start addr #16-18, fastpagemode cycles */ + vga_wcrt(regbase, CL_CRT1B, tmp); + + /* screen start address bit 19 */ + if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19) + vga_wcrt(regbase, CL_CRT1D, (pitch >> 9) & 1); + + if (is_laguna(cinfo)) { + tmp = 0; + if ((htotal + 5) & 256) + tmp |= 128; + if (hdispend & 256) + tmp |= 64; + if (hsyncstart & 256) + tmp |= 48; + if (vtotal & 1024) + tmp |= 8; + if (vdispend & 1024) + tmp |= 4; + if (vsyncstart & 1024) + tmp |= 3; + + vga_wcrt(regbase, CL_CRT1E, tmp); + dev_dbg(info->device, "CRT1e: %d\n", tmp); + } + + /* pixel panning */ + vga_wattr(regbase, CL_AR33, 0); + + /* [ EGS: SetOffset(); ] */ + /* From SetOffset(): Turn on VideoEnable bit in Attribute controller */ + AttrOn(cinfo); + + if (is_laguna(cinfo)) { + /* no tiles */ + fb_writew(control | 0x1000, cinfo->laguna_mmio + 0x402); + fb_writew(format, cinfo->laguna_mmio + 0xc0); + fb_writew(threshold, cinfo->laguna_mmio + 0xea); + } + /* finally, turn on everything - turn off "FullBandwidth" bit */ + /* also, set "DotClock%2" bit where requested */ + tmp = 0x01; + +/*** FB_VMODE_CLOCK_HALVE in linux/fb.h not defined anymore ? + if (var->vmode & FB_VMODE_CLOCK_HALVE) + tmp |= 0x08; +*/ + + vga_wseq(regbase, VGA_SEQ_CLOCK_MODE, tmp); + dev_dbg(info->device, "CL_SEQR1: %d\n", tmp); + +#ifdef CIRRUSFB_DEBUG + cirrusfb_dbg_reg_dump(info, NULL); +#endif + + return 0; +} + +/* for some reason incomprehensible to me, cirrusfb requires that you write + * the registers twice for the settings to take..grr. -dte */ +static int cirrusfb_set_par(struct fb_info *info) +{ + cirrusfb_set_par_foo(info); + return cirrusfb_set_par_foo(info); +} + +static int cirrusfb_setcolreg(unsigned regno, unsigned red, unsigned green, + unsigned blue, unsigned transp, + struct fb_info *info) +{ + struct cirrusfb_info *cinfo = info->par; + + if (regno > 255) + return -EINVAL; + + if (info->fix.visual == FB_VISUAL_TRUECOLOR) { + u32 v; + red >>= (16 - info->var.red.length); + green >>= (16 - info->var.green.length); + blue >>= (16 - info->var.blue.length); + + if (regno >= 16) + return 1; + v = (red << info->var.red.offset) | + (green << info->var.green.offset) | + (blue << info->var.blue.offset); + + cinfo->pseudo_palette[regno] = v; + return 0; + } + + if (info->var.bits_per_pixel == 8) + WClut(cinfo, regno, red >> 10, green >> 10, blue >> 10); + + return 0; + +} + +/************************************************************************* + cirrusfb_pan_display() + + performs display panning - provided hardware permits this +**************************************************************************/ +static int cirrusfb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + int xoffset; + unsigned long base; + unsigned char tmp, xpix; + struct cirrusfb_info *cinfo = info->par; + + /* no range checks for xoffset and yoffset, */ + /* as fb_pan_display has already done this */ + if (var->vmode & FB_VMODE_YWRAP) + return -EINVAL; + + xoffset = var->xoffset * info->var.bits_per_pixel / 8; + + base = var->yoffset * info->fix.line_length + xoffset; + + if (info->var.bits_per_pixel == 1) { + /* base is already correct */ + xpix = (unsigned char) (var->xoffset % 8); + } else { + base /= 4; + xpix = (unsigned char) ((xoffset % 4) * 2); + } + + if (!is_laguna(cinfo)) + cirrusfb_WaitBLT(cinfo->regbase); + + /* lower 8 + 8 bits of screen start address */ + vga_wcrt(cinfo->regbase, VGA_CRTC_START_LO, base & 0xff); + vga_wcrt(cinfo->regbase, VGA_CRTC_START_HI, (base >> 8) & 0xff); + + /* 0xf2 is %11110010, exclude tmp bits */ + tmp = vga_rcrt(cinfo->regbase, CL_CRT1B) & 0xf2; + /* construct bits 16, 17 and 18 of screen start address */ + if (base & 0x10000) + tmp |= 0x01; + if (base & 0x20000) + tmp |= 0x04; + if (base & 0x40000) + tmp |= 0x08; + + vga_wcrt(cinfo->regbase, CL_CRT1B, tmp); + + /* construct bit 19 of screen start address */ + if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19) { + tmp = vga_rcrt(cinfo->regbase, CL_CRT1D); + if (is_laguna(cinfo)) + tmp = (tmp & ~0x18) | ((base >> 16) & 0x18); + else + tmp = (tmp & ~0x80) | ((base >> 12) & 0x80); + vga_wcrt(cinfo->regbase, CL_CRT1D, tmp); + } + + /* write pixel panning value to AR33; this does not quite work in 8bpp + * + * ### Piccolo..? Will this work? + */ + if (info->var.bits_per_pixel == 1) + vga_wattr(cinfo->regbase, CL_AR33, xpix); + + return 0; +} + +static int cirrusfb_blank(int blank_mode, struct fb_info *info) +{ + /* + * Blank the screen if blank_mode != 0, else unblank. If blank == NULL + * then the caller blanks by setting the CLUT (Color Look Up Table) + * to all black. 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 + */ + unsigned char val; + struct cirrusfb_info *cinfo = info->par; + int current_mode = cinfo->blank_mode; + + dev_dbg(info->device, "ENTER, blank mode = %d\n", blank_mode); + + if (info->state != FBINFO_STATE_RUNNING || + current_mode == blank_mode) { + dev_dbg(info->device, "EXIT, returning 0\n"); + return 0; + } + + /* Undo current */ + if (current_mode == FB_BLANK_NORMAL || + current_mode == FB_BLANK_UNBLANK) + /* clear "FullBandwidth" bit */ + val = 0; + else + /* set "FullBandwidth" bit */ + val = 0x20; + + val |= vga_rseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE) & 0xdf; + vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, val); + + switch (blank_mode) { + case FB_BLANK_UNBLANK: + case FB_BLANK_NORMAL: + val = 0x00; + break; + case FB_BLANK_VSYNC_SUSPEND: + val = 0x04; + break; + case FB_BLANK_HSYNC_SUSPEND: + val = 0x02; + break; + case FB_BLANK_POWERDOWN: + val = 0x06; + break; + default: + dev_dbg(info->device, "EXIT, returning 1\n"); + return 1; + } + + vga_wgfx(cinfo->regbase, CL_GRE, val); + + cinfo->blank_mode = blank_mode; + dev_dbg(info->device, "EXIT, returning 0\n"); + + /* Let fbcon do a soft blank for us */ + return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0; +} + +/**** END Hardware specific Routines **************************************/ +/****************************************************************************/ +/**** BEGIN Internal Routines ***********************************************/ + +static void init_vgachip(struct fb_info *info) +{ + struct cirrusfb_info *cinfo = info->par; + const struct cirrusfb_board_info_rec *bi; + + assert(cinfo != NULL); + + bi = &cirrusfb_board_info[cinfo->btype]; + + /* reset board globally */ + switch (cinfo->btype) { + case BT_PICCOLO: + WSFR(cinfo, 0x01); + udelay(500); + WSFR(cinfo, 0x51); + udelay(500); + break; + case BT_PICASSO: + WSFR2(cinfo, 0xff); + udelay(500); + break; + case BT_SD64: + case BT_SPECTRUM: + WSFR(cinfo, 0x1f); + udelay(500); + WSFR(cinfo, 0x4f); + udelay(500); + break; + case BT_PICASSO4: + /* disable flickerfixer */ + vga_wcrt(cinfo->regbase, CL_CRT51, 0x00); + mdelay(100); + /* mode */ + vga_wgfx(cinfo->regbase, CL_GR31, 0x00); + /* fall through */ + case BT_GD5480: + /* from Klaus' NetBSD driver: */ + vga_wgfx(cinfo->regbase, CL_GR2F, 0x00); + /* fall through */ + case BT_ALPINE: + /* put blitter into 542x compat */ + vga_wgfx(cinfo->regbase, CL_GR33, 0x00); + break; + + case BT_LAGUNA: + case BT_LAGUNAB: + /* Nothing to do to reset the board. */ + break; + + default: + dev_err(info->device, "Warning: Unknown board type\n"); + break; + } + + /* make sure RAM size set by this point */ + assert(info->screen_size > 0); + + /* the P4 is not fully initialized here; I rely on it having been */ + /* inited under AmigaOS already, which seems to work just fine */ + /* (Klaus advised to do it this way) */ + + if (cinfo->btype != BT_PICASSO4) { + WGen(cinfo, CL_VSSM, 0x10); /* EGS: 0x16 */ + WGen(cinfo, CL_POS102, 0x01); + WGen(cinfo, CL_VSSM, 0x08); /* EGS: 0x0e */ + + if (cinfo->btype != BT_SD64) + WGen(cinfo, CL_VSSM2, 0x01); + + /* reset sequencer logic */ + vga_wseq(cinfo->regbase, VGA_SEQ_RESET, 0x03); + + /* FullBandwidth (video off) and 8/9 dot clock */ + vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, 0x21); + + /* "magic cookie" - doesn't make any sense to me.. */ +/* vga_wgfx(cinfo->regbase, CL_GRA, 0xce); */ + /* unlock all extension registers */ + vga_wseq(cinfo->regbase, CL_SEQR6, 0x12); + + switch (cinfo->btype) { + case BT_GD5480: + vga_wseq(cinfo->regbase, CL_SEQRF, 0x98); + break; + case BT_ALPINE: + case BT_LAGUNA: + case BT_LAGUNAB: + break; + case BT_SD64: +#ifdef CONFIG_ZORRO + vga_wseq(cinfo->regbase, CL_SEQRF, 0xb8); +#endif + break; + default: + vga_wseq(cinfo->regbase, CL_SEQR16, 0x0f); + vga_wseq(cinfo->regbase, CL_SEQRF, 0xb0); + break; + } + } + /* plane mask: nothing */ + vga_wseq(cinfo->regbase, VGA_SEQ_PLANE_WRITE, 0xff); + /* character map select: doesn't even matter in gx mode */ + vga_wseq(cinfo->regbase, VGA_SEQ_CHARACTER_MAP, 0x00); + /* memory mode: chain4, ext. memory */ + vga_wseq(cinfo->regbase, VGA_SEQ_MEMORY_MODE, 0x0a); + + /* controller-internal base address of video memory */ + if (bi->init_sr07) + vga_wseq(cinfo->regbase, CL_SEQR7, bi->sr07); + + /* vga_wseq(cinfo->regbase, CL_SEQR8, 0x00); */ + /* EEPROM control: shouldn't be necessary to write to this at all.. */ + + /* graphics cursor X position (incomplete; position gives rem. 3 bits */ + vga_wseq(cinfo->regbase, CL_SEQR10, 0x00); + /* graphics cursor Y position (..."... ) */ + vga_wseq(cinfo->regbase, CL_SEQR11, 0x00); + /* graphics cursor attributes */ + vga_wseq(cinfo->regbase, CL_SEQR12, 0x00); + /* graphics cursor pattern address */ + vga_wseq(cinfo->regbase, CL_SEQR13, 0x00); + + /* writing these on a P4 might give problems.. */ + if (cinfo->btype != BT_PICASSO4) { + /* configuration readback and ext. color */ + vga_wseq(cinfo->regbase, CL_SEQR17, 0x00); + /* signature generator */ + vga_wseq(cinfo->regbase, CL_SEQR18, 0x02); + } + + /* Screen A preset row scan: none */ + vga_wcrt(cinfo->regbase, VGA_CRTC_PRESET_ROW, 0x00); + /* Text cursor start: disable text cursor */ + vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_START, 0x20); + /* Text cursor end: - */ + vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_END, 0x00); + /* text cursor location high: 0 */ + vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_HI, 0x00); + /* text cursor location low: 0 */ + vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_LO, 0x00); + + /* Underline Row scanline: - */ + vga_wcrt(cinfo->regbase, VGA_CRTC_UNDERLINE, 0x00); + /* ### add 0x40 for text modes with > 30 MHz pixclock */ + /* ext. display controls: ext.adr. wrap */ + vga_wcrt(cinfo->regbase, CL_CRT1B, 0x02); + + /* Set/Reset registers: - */ + vga_wgfx(cinfo->regbase, VGA_GFX_SR_VALUE, 0x00); + /* Set/Reset enable: - */ + vga_wgfx(cinfo->regbase, VGA_GFX_SR_ENABLE, 0x00); + /* Color Compare: - */ + vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_VALUE, 0x00); + /* Data Rotate: - */ + vga_wgfx(cinfo->regbase, VGA_GFX_DATA_ROTATE, 0x00); + /* Read Map Select: - */ + vga_wgfx(cinfo->regbase, VGA_GFX_PLANE_READ, 0x00); + /* Mode: conf. for 16/4/2 color mode, no odd/even, read/write mode 0 */ + vga_wgfx(cinfo->regbase, VGA_GFX_MODE, 0x00); + /* Miscellaneous: memory map base address, graphics mode */ + vga_wgfx(cinfo->regbase, VGA_GFX_MISC, 0x01); + /* Color Don't care: involve all planes */ + vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_MASK, 0x0f); + /* Bit Mask: no mask at all */ + vga_wgfx(cinfo->regbase, VGA_GFX_BIT_MASK, 0xff); + + if (cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64 || + is_laguna(cinfo)) + /* (5434 can't have bit 3 set for bitblt) */ + vga_wgfx(cinfo->regbase, CL_GRB, 0x20); + else + /* Graphics controller mode extensions: finer granularity, + * 8byte data latches + */ + vga_wgfx(cinfo->regbase, CL_GRB, 0x28); + + vga_wgfx(cinfo->regbase, CL_GRC, 0xff); /* Color Key compare: - */ + vga_wgfx(cinfo->regbase, CL_GRD, 0x00); /* Color Key compare mask: - */ + vga_wgfx(cinfo->regbase, CL_GRE, 0x00); /* Miscellaneous control: - */ + /* Background color byte 1: - */ + /* vga_wgfx (cinfo->regbase, CL_GR10, 0x00); */ + /* vga_wgfx (cinfo->regbase, CL_GR11, 0x00); */ + + /* Attribute Controller palette registers: "identity mapping" */ + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE0, 0x00); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE1, 0x01); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE2, 0x02); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE3, 0x03); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE4, 0x04); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE5, 0x05); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE6, 0x06); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE7, 0x07); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE8, 0x08); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTE9, 0x09); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTEA, 0x0a); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTEB, 0x0b); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTEC, 0x0c); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTED, 0x0d); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTEE, 0x0e); + vga_wattr(cinfo->regbase, VGA_ATC_PALETTEF, 0x0f); + + /* Attribute Controller mode: graphics mode */ + vga_wattr(cinfo->regbase, VGA_ATC_MODE, 0x01); + /* Overscan color reg.: reg. 0 */ + vga_wattr(cinfo->regbase, VGA_ATC_OVERSCAN, 0x00); + /* Color Plane enable: Enable all 4 planes */ + vga_wattr(cinfo->regbase, VGA_ATC_PLANE_ENABLE, 0x0f); + /* Color Select: - */ + vga_wattr(cinfo->regbase, VGA_ATC_COLOR_PAGE, 0x00); + + WGen(cinfo, VGA_PEL_MSK, 0xff); /* Pixel mask: no mask */ + + /* BLT Start/status: Blitter reset */ + vga_wgfx(cinfo->regbase, CL_GR31, 0x04); + /* - " - : "end-of-reset" */ + vga_wgfx(cinfo->regbase, CL_GR31, 0x00); + + /* misc... */ + WHDR(cinfo, 0); /* Hidden DAC register: - */ + return; +} + +static void switch_monitor(struct cirrusfb_info *cinfo, int on) +{ +#ifdef CONFIG_ZORRO /* only works on Zorro boards */ + static int IsOn = 0; /* XXX not ok for multiple boards */ + + if (cinfo->btype == BT_PICASSO4) + return; /* nothing to switch */ + if (cinfo->btype == BT_ALPINE) + return; /* nothing to switch */ + if (cinfo->btype == BT_GD5480) + return; /* nothing to switch */ + if (cinfo->btype == BT_PICASSO) { + if ((on && !IsOn) || (!on && IsOn)) + WSFR(cinfo, 0xff); + return; + } + if (on) { + switch (cinfo->btype) { + case BT_SD64: + WSFR(cinfo, cinfo->SFR | 0x21); + break; + case BT_PICCOLO: + WSFR(cinfo, cinfo->SFR | 0x28); + break; + case BT_SPECTRUM: + WSFR(cinfo, 0x6f); + break; + default: /* do nothing */ break; + } + } else { + switch (cinfo->btype) { + case BT_SD64: + WSFR(cinfo, cinfo->SFR & 0xde); + break; + case BT_PICCOLO: + WSFR(cinfo, cinfo->SFR & 0xd7); + break; + case BT_SPECTRUM: + WSFR(cinfo, 0x4f); + break; + default: /* do nothing */ + break; + } + } +#endif /* CONFIG_ZORRO */ +} + +/******************************************/ +/* Linux 2.6-style accelerated functions */ +/******************************************/ + +static int cirrusfb_sync(struct fb_info *info) +{ + struct cirrusfb_info *cinfo = info->par; + + if (!is_laguna(cinfo)) { + while (vga_rgfx(cinfo->regbase, CL_GR31) & 0x03) + cpu_relax(); + } + return 0; +} + +static void cirrusfb_fillrect(struct fb_info *info, + const struct fb_fillrect *region) +{ + struct fb_fillrect modded; + int vxres, vyres; + struct cirrusfb_info *cinfo = info->par; + int m = info->var.bits_per_pixel; + u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ? + cinfo->pseudo_palette[region->color] : region->color; + + if (info->state != FBINFO_STATE_RUNNING) + return; + if (info->flags & FBINFO_HWACCEL_DISABLED) { + cfb_fillrect(info, region); + return; + } + + vxres = info->var.xres_virtual; + vyres = info->var.yres_virtual; + + memcpy(&modded, region, sizeof(struct fb_fillrect)); + + if (!modded.width || !modded.height || + modded.dx >= vxres || modded.dy >= vyres) + return; + + if (modded.dx + modded.width > vxres) + modded.width = vxres - modded.dx; + if (modded.dy + modded.height > vyres) + modded.height = vyres - modded.dy; + + cirrusfb_RectFill(cinfo->regbase, + info->var.bits_per_pixel, + (region->dx * m) / 8, region->dy, + (region->width * m) / 8, region->height, + color, color, + info->fix.line_length, 0x40); +} + +static void cirrusfb_copyarea(struct fb_info *info, + const struct fb_copyarea *area) +{ + struct fb_copyarea modded; + u32 vxres, vyres; + struct cirrusfb_info *cinfo = info->par; + int m = info->var.bits_per_pixel; + + if (info->state != FBINFO_STATE_RUNNING) + return; + if (info->flags & FBINFO_HWACCEL_DISABLED) { + cfb_copyarea(info, area); + return; + } + + vxres = info->var.xres_virtual; + vyres = info->var.yres_virtual; + memcpy(&modded, area, sizeof(struct fb_copyarea)); + + if (!modded.width || !modded.height || + modded.sx >= vxres || modded.sy >= vyres || + modded.dx >= vxres || modded.dy >= vyres) + return; + + if (modded.sx + modded.width > vxres) + modded.width = vxres - modded.sx; + if (modded.dx + modded.width > vxres) + modded.width = vxres - modded.dx; + if (modded.sy + modded.height > vyres) + modded.height = vyres - modded.sy; + if (modded.dy + modded.height > vyres) + modded.height = vyres - modded.dy; + + cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel, + (area->sx * m) / 8, area->sy, + (area->dx * m) / 8, area->dy, + (area->width * m) / 8, area->height, + info->fix.line_length); + +} + +static void cirrusfb_imageblit(struct fb_info *info, + const struct fb_image *image) +{ + struct cirrusfb_info *cinfo = info->par; + unsigned char op = (info->var.bits_per_pixel == 24) ? 0xc : 0x4; + + if (info->state != FBINFO_STATE_RUNNING) + return; + /* Alpine/SD64 does not work at 24bpp ??? */ + if (info->flags & FBINFO_HWACCEL_DISABLED || image->depth != 1) + cfb_imageblit(info, image); + else if ((cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64) && + op == 0xc) + cfb_imageblit(info, image); + else { + unsigned size = ((image->width + 7) >> 3) * image->height; + int m = info->var.bits_per_pixel; + u32 fg, bg; + + if (info->var.bits_per_pixel == 8) { + fg = image->fg_color; + bg = image->bg_color; + } else { + fg = ((u32 *)(info->pseudo_palette))[image->fg_color]; + bg = ((u32 *)(info->pseudo_palette))[image->bg_color]; + } + if (info->var.bits_per_pixel == 24) { + /* clear background first */ + cirrusfb_RectFill(cinfo->regbase, + info->var.bits_per_pixel, + (image->dx * m) / 8, image->dy, + (image->width * m) / 8, + image->height, + bg, bg, + info->fix.line_length, 0x40); + } + cirrusfb_RectFill(cinfo->regbase, + info->var.bits_per_pixel, + (image->dx * m) / 8, image->dy, + (image->width * m) / 8, image->height, + fg, bg, + info->fix.line_length, op); + memcpy(info->screen_base, image->data, size); + } +} + +#ifdef CONFIG_PCI +static int release_io_ports; + +/* Pulled the logic from XFree86 Cirrus driver to get the memory size, + * based on the DRAM bandwidth bit and DRAM bank switching bit. This + * works with 1MB, 2MB and 4MB configurations (which the Motorola boards + * seem to have. */ +static unsigned int cirrusfb_get_memsize(struct fb_info *info, + u8 __iomem *regbase) +{ + unsigned long mem; + struct cirrusfb_info *cinfo = info->par; + + if (is_laguna(cinfo)) { + unsigned char SR14 = vga_rseq(regbase, CL_SEQR14); + + mem = ((SR14 & 7) + 1) << 20; + } else { + unsigned char SRF = vga_rseq(regbase, CL_SEQRF); + switch ((SRF & 0x18)) { + case 0x08: + mem = 512 * 1024; + break; + case 0x10: + mem = 1024 * 1024; + break; + /* 64-bit DRAM data bus width; assume 2MB. + * Also indicates 2MB memory on the 5430. + */ + case 0x18: + mem = 2048 * 1024; + break; + default: + dev_warn(info->device, "Unknown memory size!\n"); + mem = 1024 * 1024; + } + /* If DRAM bank switching is enabled, there must be + * twice as much memory installed. (4MB on the 5434) + */ + if (cinfo->btype != BT_ALPINE && (SRF & 0x80) != 0) + mem *= 2; + } + + /* TODO: Handling of GD5446/5480 (see XF86 sources ...) */ + return mem; +} + +static void get_pci_addrs(const struct pci_dev *pdev, + unsigned long *display, unsigned long *registers) +{ + assert(pdev != NULL); + assert(display != NULL); + assert(registers != NULL); + + *display = 0; + *registers = 0; + + /* This is a best-guess for now */ + + if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { + *display = pci_resource_start(pdev, 1); + *registers = pci_resource_start(pdev, 0); + } else { + *display = pci_resource_start(pdev, 0); + *registers = pci_resource_start(pdev, 1); + } + + assert(*display != 0); +} + +static void cirrusfb_pci_unmap(struct fb_info *info) +{ + struct pci_dev *pdev = to_pci_dev(info->device); + struct cirrusfb_info *cinfo = info->par; + + if (cinfo->laguna_mmio == NULL) + iounmap(cinfo->laguna_mmio); + iounmap(info->screen_base); +#if 0 /* if system didn't claim this region, we would... */ + release_mem_region(0xA0000, 65535); +#endif + if (release_io_ports) + release_region(0x3C0, 32); + pci_release_regions(pdev); +} +#endif /* CONFIG_PCI */ + +#ifdef CONFIG_ZORRO +static void cirrusfb_zorro_unmap(struct fb_info *info) +{ + struct cirrusfb_info *cinfo = info->par; + struct zorro_dev *zdev = to_zorro_dev(info->device); + + if (info->fix.smem_start > 16 * MB_) + iounmap(info->screen_base); + if (info->fix.mmio_start > 16 * MB_) + iounmap(cinfo->regbase); + + zorro_release_device(zdev); +} +#endif /* CONFIG_ZORRO */ + +/* function table of the above functions */ +static struct fb_ops cirrusfb_ops = { + .owner = THIS_MODULE, + .fb_open = cirrusfb_open, + .fb_release = cirrusfb_release, + .fb_setcolreg = cirrusfb_setcolreg, + .fb_check_var = cirrusfb_check_var, + .fb_set_par = cirrusfb_set_par, + .fb_pan_display = cirrusfb_pan_display, + .fb_blank = cirrusfb_blank, + .fb_fillrect = cirrusfb_fillrect, + .fb_copyarea = cirrusfb_copyarea, + .fb_sync = cirrusfb_sync, + .fb_imageblit = cirrusfb_imageblit, +}; + +static int cirrusfb_set_fbinfo(struct fb_info *info) +{ + struct cirrusfb_info *cinfo = info->par; + struct fb_var_screeninfo *var = &info->var; + + info->pseudo_palette = cinfo->pseudo_palette; + info->flags = FBINFO_DEFAULT + | FBINFO_HWACCEL_XPAN + | FBINFO_HWACCEL_YPAN + | FBINFO_HWACCEL_FILLRECT + | FBINFO_HWACCEL_IMAGEBLIT + | FBINFO_HWACCEL_COPYAREA; + if (noaccel || is_laguna(cinfo)) { + info->flags |= FBINFO_HWACCEL_DISABLED; + info->fix.accel = FB_ACCEL_NONE; + } else + info->fix.accel = FB_ACCEL_CIRRUS_ALPINE; + + info->fbops = &cirrusfb_ops; + + if (cinfo->btype == BT_GD5480) { + if (var->bits_per_pixel == 16) + info->screen_base += 1 * MB_; + if (var->bits_per_pixel == 32) + info->screen_base += 2 * MB_; + } + + /* Fill fix common fields */ + strlcpy(info->fix.id, cirrusfb_board_info[cinfo->btype].name, + sizeof(info->fix.id)); + + /* monochrome: only 1 memory plane */ + /* 8 bit and above: Use whole memory area */ + info->fix.smem_len = info->screen_size; + if (var->bits_per_pixel == 1) + info->fix.smem_len /= 4; + info->fix.type_aux = 0; + info->fix.xpanstep = 1; + info->fix.ypanstep = 1; + info->fix.ywrapstep = 0; + + /* FIXME: map region at 0xB8000 if available, fill in here */ + info->fix.mmio_len = 0; + + fb_alloc_cmap(&info->cmap, 256, 0); + + return 0; +} + +static int cirrusfb_register(struct fb_info *info) +{ + struct cirrusfb_info *cinfo = info->par; + int err; + + /* sanity checks */ + assert(cinfo->btype != BT_NONE); + + /* set all the vital stuff */ + cirrusfb_set_fbinfo(info); + + dev_dbg(info->device, "(RAM start set to: 0x%p)\n", info->screen_base); + + err = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 8); + if (!err) { + dev_dbg(info->device, "wrong initial video mode\n"); + err = -EINVAL; + goto err_dealloc_cmap; + } + + info->var.activate = FB_ACTIVATE_NOW; + + err = cirrusfb_check_var(&info->var, info); + if (err < 0) { + /* should never happen */ + dev_dbg(info->device, + "choking on default var... umm, no good.\n"); + goto err_dealloc_cmap; + } + + err = register_framebuffer(info); + if (err < 0) { + dev_err(info->device, + "could not register fb device; err = %d!\n", err); + goto err_dealloc_cmap; + } + + return 0; + +err_dealloc_cmap: + fb_dealloc_cmap(&info->cmap); + return err; +} + +static void cirrusfb_cleanup(struct fb_info *info) +{ + struct cirrusfb_info *cinfo = info->par; + + switch_monitor(cinfo, 0); + unregister_framebuffer(info); + fb_dealloc_cmap(&info->cmap); + dev_dbg(info->device, "Framebuffer unregistered\n"); + cinfo->unmap(info); + framebuffer_release(info); +} + +#ifdef CONFIG_PCI +static int cirrusfb_pci_register(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct cirrusfb_info *cinfo; + struct fb_info *info; + unsigned long board_addr, board_size; + int ret; + + ret = pci_enable_device(pdev); + if (ret < 0) { + printk(KERN_ERR "cirrusfb: Cannot enable PCI device\n"); + goto err_out; + } + + info = framebuffer_alloc(sizeof(struct cirrusfb_info), &pdev->dev); + if (!info) { + printk(KERN_ERR "cirrusfb: could not allocate memory\n"); + ret = -ENOMEM; + goto err_out; + } + + cinfo = info->par; + cinfo->btype = (enum cirrus_board) ent->driver_data; + + dev_dbg(info->device, + " Found PCI device, base address 0 is 0x%Lx, btype set to %d\n", + (unsigned long long)pdev->resource[0].start, cinfo->btype); + dev_dbg(info->device, " base address 1 is 0x%Lx\n", + (unsigned long long)pdev->resource[1].start); + + dev_dbg(info->device, + "Attempt to get PCI info for Cirrus Graphics Card\n"); + get_pci_addrs(pdev, &board_addr, &info->fix.mmio_start); + /* FIXME: this forces VGA. alternatives? */ + cinfo->regbase = NULL; + cinfo->laguna_mmio = ioremap(info->fix.mmio_start, 0x1000); + + dev_dbg(info->device, "Board address: 0x%lx, register address: 0x%lx\n", + board_addr, info->fix.mmio_start); + + board_size = (cinfo->btype == BT_GD5480) ? + 32 * MB_ : cirrusfb_get_memsize(info, cinfo->regbase); + + ret = pci_request_regions(pdev, "cirrusfb"); + if (ret < 0) { + dev_err(info->device, "cannot reserve region 0x%lx, abort\n", + board_addr); + goto err_release_fb; + } +#if 0 /* if the system didn't claim this region, we would... */ + if (!request_mem_region(0xA0000, 65535, "cirrusfb")) { + dev_err(info->device, "cannot reserve region 0x%lx, abort\n", + 0xA0000L); + ret = -EBUSY; + goto err_release_regions; + } +#endif + if (request_region(0x3C0, 32, "cirrusfb")) + release_io_ports = 1; + + info->screen_base = ioremap(board_addr, board_size); + if (!info->screen_base) { + ret = -EIO; + goto err_release_legacy; + } + + info->fix.smem_start = board_addr; + info->screen_size = board_size; + cinfo->unmap = cirrusfb_pci_unmap; + + dev_info(info->device, + "Cirrus Logic chipset on PCI bus, RAM (%lu kB) at 0x%lx\n", + info->screen_size >> 10, board_addr); + pci_set_drvdata(pdev, info); + + ret = cirrusfb_register(info); + if (!ret) + return 0; + + iounmap(info->screen_base); +err_release_legacy: + if (release_io_ports) + release_region(0x3C0, 32); +#if 0 + release_mem_region(0xA0000, 65535); +err_release_regions: +#endif + pci_release_regions(pdev); +err_release_fb: + if (cinfo->laguna_mmio != NULL) + iounmap(cinfo->laguna_mmio); + framebuffer_release(info); +err_out: + return ret; +} + +static void cirrusfb_pci_unregister(struct pci_dev *pdev) +{ + struct fb_info *info = pci_get_drvdata(pdev); + + cirrusfb_cleanup(info); +} + +static struct pci_driver cirrusfb_pci_driver = { + .name = "cirrusfb", + .id_table = cirrusfb_pci_table, + .probe = cirrusfb_pci_register, + .remove = cirrusfb_pci_unregister, +#ifdef CONFIG_PM +#if 0 + .suspend = cirrusfb_pci_suspend, + .resume = cirrusfb_pci_resume, +#endif +#endif +}; +#endif /* CONFIG_PCI */ + +#ifdef CONFIG_ZORRO +static int cirrusfb_zorro_register(struct zorro_dev *z, + const struct zorro_device_id *ent) +{ + struct fb_info *info; + int error; + const struct zorrocl *zcl; + enum cirrus_board btype; + unsigned long regbase, ramsize, rambase; + struct cirrusfb_info *cinfo; + + info = framebuffer_alloc(sizeof(struct cirrusfb_info), &z->dev); + if (!info) { + printk(KERN_ERR "cirrusfb: could not allocate memory\n"); + return -ENOMEM; + } + + zcl = (const struct zorrocl *)ent->driver_data; + btype = zcl->type; + regbase = zorro_resource_start(z) + zcl->regoffset; + ramsize = zcl->ramsize; + if (ramsize) { + rambase = zorro_resource_start(z) + zcl->ramoffset; + if (zorro_resource_len(z) == 64 * MB_) { + /* Quirk for 64 MiB Picasso IV */ + rambase += zcl->ramoffset; + } + } else { + struct zorro_dev *ram = zorro_find_device(zcl->ramid, NULL); + if (!ram || !zorro_resource_len(ram)) { + dev_err(info->device, "No video RAM found\n"); + error = -ENODEV; + goto err_release_fb; + } + rambase = zorro_resource_start(ram); + ramsize = zorro_resource_len(ram); + if (zcl->ramid2 && + (ram = zorro_find_device(zcl->ramid2, NULL))) { + if (zorro_resource_start(ram) != rambase + ramsize) { + dev_warn(info->device, + "Skipping non-contiguous RAM at %pR\n", + &ram->resource); + } else { + ramsize += zorro_resource_len(ram); + } + } + } + + dev_info(info->device, + "%s board detected, REG at 0x%lx, %lu MiB RAM at 0x%lx\n", + cirrusfb_board_info[btype].name, regbase, ramsize / MB_, + rambase); + + if (!zorro_request_device(z, "cirrusfb")) { + dev_err(info->device, "Cannot reserve %pR\n", &z->resource); + error = -EBUSY; + goto err_release_fb; + } + + cinfo = info->par; + cinfo->btype = btype; + + info->fix.mmio_start = regbase; + cinfo->regbase = regbase > 16 * MB_ ? ioremap(regbase, 64 * 1024) + : ZTWO_VADDR(regbase); + if (!cinfo->regbase) { + dev_err(info->device, "Cannot map registers\n"); + error = -EIO; + goto err_release_dev; + } + + info->fix.smem_start = rambase; + info->screen_size = ramsize; + info->screen_base = rambase > 16 * MB_ ? ioremap(rambase, ramsize) + : ZTWO_VADDR(rambase); + if (!info->screen_base) { + dev_err(info->device, "Cannot map video RAM\n"); + error = -EIO; + goto err_unmap_reg; + } + + cinfo->unmap = cirrusfb_zorro_unmap; + + dev_info(info->device, + "Cirrus Logic chipset on Zorro bus, RAM (%lu MiB) at 0x%lx\n", + ramsize / MB_, rambase); + + /* MCLK select etc. */ + if (cirrusfb_board_info[btype].init_sr1f) + vga_wseq(cinfo->regbase, CL_SEQR1F, + cirrusfb_board_info[btype].sr1f); + + error = cirrusfb_register(info); + if (error) { + dev_err(info->device, "Failed to register device, error %d\n", + error); + goto err_unmap_ram; + } + + zorro_set_drvdata(z, info); + return 0; + +err_unmap_ram: + if (rambase > 16 * MB_) + iounmap(info->screen_base); + +err_unmap_reg: + if (regbase > 16 * MB_) + iounmap(cinfo->regbase); +err_release_dev: + zorro_release_device(z); +err_release_fb: + framebuffer_release(info); + return error; +} + +void cirrusfb_zorro_unregister(struct zorro_dev *z) +{ + struct fb_info *info = zorro_get_drvdata(z); + + cirrusfb_cleanup(info); + zorro_set_drvdata(z, NULL); +} + +static struct zorro_driver cirrusfb_zorro_driver = { + .name = "cirrusfb", + .id_table = cirrusfb_zorro_table, + .probe = cirrusfb_zorro_register, + .remove = cirrusfb_zorro_unregister, +}; +#endif /* CONFIG_ZORRO */ + +#ifndef MODULE +static int __init cirrusfb_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, "noaccel")) + noaccel = 1; + else if (!strncmp(this_opt, "mode:", 5)) + mode_option = this_opt + 5; + else + mode_option = this_opt; + } + return 0; +} +#endif + + /* + * Modularization + */ + +MODULE_AUTHOR("Copyright 1999,2000 Jeff Garzik <jgarzik@pobox.com>"); +MODULE_DESCRIPTION("Accelerated FBDev driver for Cirrus Logic chips"); +MODULE_LICENSE("GPL"); + +static int __init cirrusfb_init(void) +{ + int error = 0; + +#ifndef MODULE + char *option = NULL; + + if (fb_get_options("cirrusfb", &option)) + return -ENODEV; + cirrusfb_setup(option); +#endif + +#ifdef CONFIG_ZORRO + error |= zorro_register_driver(&cirrusfb_zorro_driver); +#endif +#ifdef CONFIG_PCI + error |= pci_register_driver(&cirrusfb_pci_driver); +#endif + return error; +} + +static void __exit cirrusfb_exit(void) +{ +#ifdef CONFIG_PCI + pci_unregister_driver(&cirrusfb_pci_driver); +#endif +#ifdef CONFIG_ZORRO + zorro_unregister_driver(&cirrusfb_zorro_driver); +#endif +} + +module_init(cirrusfb_init); + +module_param(mode_option, charp, 0); +MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'"); +module_param(noaccel, bool, 0); +MODULE_PARM_DESC(noaccel, "Disable acceleration"); + +#ifdef MODULE +module_exit(cirrusfb_exit); +#endif + +/**********************************************************************/ +/* about the following functions - I have used the same names for the */ +/* functions as Markus Wild did in his Retina driver for NetBSD as */ +/* they just made sense for this purpose. Apart from that, I wrote */ +/* these functions myself. */ +/**********************************************************************/ + +/*** WGen() - write into one of the external/general registers ***/ +static void WGen(const struct cirrusfb_info *cinfo, + int regnum, unsigned char val) +{ + unsigned long regofs = 0; + + if (cinfo->btype == BT_PICASSO) { + /* Picasso II specific hack */ +/* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D || + regnum == CL_VSSM2) */ + if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D) + regofs = 0xfff; + } + + vga_w(cinfo->regbase, regofs + regnum, val); +} + +/*** RGen() - read out one of the external/general registers ***/ +static unsigned char RGen(const struct cirrusfb_info *cinfo, int regnum) +{ + unsigned long regofs = 0; + + if (cinfo->btype == BT_PICASSO) { + /* Picasso II specific hack */ +/* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D || + regnum == CL_VSSM2) */ + if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D) + regofs = 0xfff; + } + + return vga_r(cinfo->regbase, regofs + regnum); +} + +/*** AttrOn() - turn on VideoEnable for Attribute controller ***/ +static void AttrOn(const struct cirrusfb_info *cinfo) +{ + assert(cinfo != NULL); + + if (vga_rcrt(cinfo->regbase, CL_CRT24) & 0x80) { + /* if we're just in "write value" mode, write back the */ + /* same value as before to not modify anything */ + vga_w(cinfo->regbase, VGA_ATT_IW, + vga_r(cinfo->regbase, VGA_ATT_R)); + } + /* turn on video bit */ +/* vga_w(cinfo->regbase, VGA_ATT_IW, 0x20); */ + vga_w(cinfo->regbase, VGA_ATT_IW, 0x33); + + /* dummy write on Reg0 to be on "write index" mode next time */ + vga_w(cinfo->regbase, VGA_ATT_IW, 0x00); +} + +/*** WHDR() - write into the Hidden DAC register ***/ +/* as the HDR is the only extension register that requires special treatment + * (the other extension registers are accessible just like the "ordinary" + * registers of their functional group) here is a specialized routine for + * accessing the HDR + */ +static void WHDR(const struct cirrusfb_info *cinfo, unsigned char val) +{ + unsigned char dummy; + + if (is_laguna(cinfo)) + return; + if (cinfo->btype == BT_PICASSO) { + /* Klaus' hint for correct access to HDR on some boards */ + /* first write 0 to pixel mask (3c6) */ + WGen(cinfo, VGA_PEL_MSK, 0x00); + udelay(200); + /* next read dummy from pixel address (3c8) */ + dummy = RGen(cinfo, VGA_PEL_IW); + udelay(200); + } + /* now do the usual stuff to access the HDR */ + + dummy = RGen(cinfo, VGA_PEL_MSK); + udelay(200); + dummy = RGen(cinfo, VGA_PEL_MSK); + udelay(200); + dummy = RGen(cinfo, VGA_PEL_MSK); + udelay(200); + dummy = RGen(cinfo, VGA_PEL_MSK); + udelay(200); + + WGen(cinfo, VGA_PEL_MSK, val); + udelay(200); + + if (cinfo->btype == BT_PICASSO) { + /* now first reset HDR access counter */ + dummy = RGen(cinfo, VGA_PEL_IW); + udelay(200); + + /* and at the end, restore the mask value */ + /* ## is this mask always 0xff? */ + WGen(cinfo, VGA_PEL_MSK, 0xff); + udelay(200); + } +} + +/*** WSFR() - write to the "special function register" (SFR) ***/ +static void WSFR(struct cirrusfb_info *cinfo, unsigned char val) +{ +#ifdef CONFIG_ZORRO + assert(cinfo->regbase != NULL); + cinfo->SFR = val; + z_writeb(val, cinfo->regbase + 0x8000); +#endif +} + +/* The Picasso has a second register for switching the monitor bit */ +static void WSFR2(struct cirrusfb_info *cinfo, unsigned char val) +{ +#ifdef CONFIG_ZORRO + /* writing an arbitrary value to this one causes the monitor switcher */ + /* to flip to Amiga display */ + assert(cinfo->regbase != NULL); + cinfo->SFR = val; + z_writeb(val, cinfo->regbase + 0x9000); +#endif +} + +/*** WClut - set CLUT entry (range: 0..63) ***/ +static void WClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char red, + unsigned char green, unsigned char blue) +{ + unsigned int data = VGA_PEL_D; + + /* address write mode register is not translated.. */ + vga_w(cinfo->regbase, VGA_PEL_IW, regnum); + + if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 || + cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480 || + cinfo->btype == BT_SD64 || is_laguna(cinfo)) { + /* but DAC data register IS, at least for Picasso II */ + if (cinfo->btype == BT_PICASSO) + data += 0xfff; + vga_w(cinfo->regbase, data, red); + vga_w(cinfo->regbase, data, green); + vga_w(cinfo->regbase, data, blue); + } else { + vga_w(cinfo->regbase, data, blue); + vga_w(cinfo->regbase, data, green); + vga_w(cinfo->regbase, data, red); + } +} + +#if 0 +/*** RClut - read CLUT entry (range 0..63) ***/ +static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char *red, + unsigned char *green, unsigned char *blue) +{ + unsigned int data = VGA_PEL_D; + + vga_w(cinfo->regbase, VGA_PEL_IR, regnum); + + if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 || + cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480) { + if (cinfo->btype == BT_PICASSO) + data += 0xfff; + *red = vga_r(cinfo->regbase, data); + *green = vga_r(cinfo->regbase, data); + *blue = vga_r(cinfo->regbase, data); + } else { + *blue = vga_r(cinfo->regbase, data); + *green = vga_r(cinfo->regbase, data); + *red = vga_r(cinfo->regbase, data); + } +} +#endif + +/******************************************************************* + cirrusfb_WaitBLT() + + Wait for the BitBLT engine to complete a possible earlier job +*********************************************************************/ + +/* FIXME: use interrupts instead */ +static void cirrusfb_WaitBLT(u8 __iomem *regbase) +{ + while (vga_rgfx(regbase, CL_GR31) & 0x08) + cpu_relax(); +} + +/******************************************************************* + cirrusfb_BitBLT() + + perform accelerated "scrolling" +********************************************************************/ + +static void cirrusfb_set_blitter(u8 __iomem *regbase, + u_short nwidth, u_short nheight, + u_long nsrc, u_long ndest, + u_short bltmode, u_short line_length) + +{ + /* pitch: set to line_length */ + /* dest pitch low */ + vga_wgfx(regbase, CL_GR24, line_length & 0xff); + /* dest pitch hi */ + vga_wgfx(regbase, CL_GR25, line_length >> 8); + /* source pitch low */ + vga_wgfx(regbase, CL_GR26, line_length & 0xff); + /* source pitch hi */ + vga_wgfx(regbase, CL_GR27, line_length >> 8); + + /* BLT width: actual number of pixels - 1 */ + /* BLT width low */ + vga_wgfx(regbase, CL_GR20, nwidth & 0xff); + /* BLT width hi */ + vga_wgfx(regbase, CL_GR21, nwidth >> 8); + + /* BLT height: actual number of lines -1 */ + /* BLT height low */ + vga_wgfx(regbase, CL_GR22, nheight & 0xff); + /* BLT width hi */ + vga_wgfx(regbase, CL_GR23, nheight >> 8); + + /* BLT destination */ + /* BLT dest low */ + vga_wgfx(regbase, CL_GR28, (u_char) (ndest & 0xff)); + /* BLT dest mid */ + vga_wgfx(regbase, CL_GR29, (u_char) (ndest >> 8)); + /* BLT dest hi */ + vga_wgfx(regbase, CL_GR2A, (u_char) (ndest >> 16)); + + /* BLT source */ + /* BLT src low */ + vga_wgfx(regbase, CL_GR2C, (u_char) (nsrc & 0xff)); + /* BLT src mid */ + vga_wgfx(regbase, CL_GR2D, (u_char) (nsrc >> 8)); + /* BLT src hi */ + vga_wgfx(regbase, CL_GR2E, (u_char) (nsrc >> 16)); + + /* BLT mode */ + vga_wgfx(regbase, CL_GR30, bltmode); /* BLT mode */ + + /* BLT ROP: SrcCopy */ + vga_wgfx(regbase, CL_GR32, 0x0d); /* BLT ROP */ + + /* and finally: GO! */ + vga_wgfx(regbase, CL_GR31, 0x02); /* BLT Start/status */ +} + +/******************************************************************* + cirrusfb_BitBLT() + + perform accelerated "scrolling" +********************************************************************/ + +static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel, + u_short curx, u_short cury, + u_short destx, u_short desty, + u_short width, u_short height, + u_short line_length) +{ + u_short nwidth = width - 1; + u_short nheight = height - 1; + u_long nsrc, ndest; + u_char bltmode; + + bltmode = 0x00; + /* if source adr < dest addr, do the Blt backwards */ + if (cury <= desty) { + if (cury == desty) { + /* if src and dest are on the same line, check x */ + if (curx < destx) + bltmode |= 0x01; + } else + bltmode |= 0x01; + } + /* standard case: forward blitting */ + nsrc = (cury * line_length) + curx; + ndest = (desty * line_length) + destx; + if (bltmode) { + /* this means start addresses are at the end, + * counting backwards + */ + nsrc += nheight * line_length + nwidth; + ndest += nheight * line_length + nwidth; + } + + cirrusfb_WaitBLT(regbase); + + cirrusfb_set_blitter(regbase, nwidth, nheight, + nsrc, ndest, bltmode, line_length); +} + +/******************************************************************* + cirrusfb_RectFill() + + perform accelerated rectangle fill +********************************************************************/ + +static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel, + u_short x, u_short y, u_short width, u_short height, + u32 fg_color, u32 bg_color, u_short line_length, + u_char blitmode) +{ + u_long ndest = (y * line_length) + x; + u_char op; + + cirrusfb_WaitBLT(regbase); + + /* This is a ColorExpand Blt, using the */ + /* same color for foreground and background */ + vga_wgfx(regbase, VGA_GFX_SR_VALUE, bg_color); + vga_wgfx(regbase, VGA_GFX_SR_ENABLE, fg_color); + + op = 0x80; + if (bits_per_pixel >= 16) { + vga_wgfx(regbase, CL_GR10, bg_color >> 8); + vga_wgfx(regbase, CL_GR11, fg_color >> 8); + op = 0x90; + } + if (bits_per_pixel >= 24) { + vga_wgfx(regbase, CL_GR12, bg_color >> 16); + vga_wgfx(regbase, CL_GR13, fg_color >> 16); + op = 0xa0; + } + if (bits_per_pixel == 32) { + vga_wgfx(regbase, CL_GR14, bg_color >> 24); + vga_wgfx(regbase, CL_GR15, fg_color >> 24); + op = 0xb0; + } + cirrusfb_set_blitter(regbase, width - 1, height - 1, + 0, ndest, op | blitmode, line_length); +} + +/************************************************************************** + * bestclock() - determine closest possible clock lower(?) than the + * desired pixel clock + **************************************************************************/ +static void bestclock(long freq, int *nom, int *den, int *div) +{ + int n, d; + long h, diff; + + assert(nom != NULL); + assert(den != NULL); + assert(div != NULL); + + *nom = 0; + *den = 0; + *div = 0; + + if (freq < 8000) + freq = 8000; + + diff = freq; + + for (n = 32; n < 128; n++) { + int s = 0; + + d = (14318 * n) / freq; + if ((d >= 7) && (d <= 63)) { + int temp = d; + + if (temp > 31) { + s = 1; + temp >>= 1; + } + h = ((14318 * n) / temp) >> s; + h = h > freq ? h - freq : freq - h; + if (h < diff) { + diff = h; + *nom = n; + *den = temp; + *div = s; + } + } + d++; + if ((d >= 7) && (d <= 63)) { + if (d > 31) { + s = 1; + d >>= 1; + } + h = ((14318 * n) / d) >> s; + h = h > freq ? h - freq : freq - h; + if (h < diff) { + diff = h; + *nom = n; + *den = d; + *div = s; + } + } + } +} + +/* ------------------------------------------------------------------------- + * + * debugging functions + * + * ------------------------------------------------------------------------- + */ + +#ifdef CIRRUSFB_DEBUG + +/** + * cirrusfb_dbg_print_regs + * @base: If using newmmio, the newmmio base address, otherwise %NULL + * @reg_class: type of registers to read: %CRT, or %SEQ + * + * DESCRIPTION: + * Dumps the given list of VGA CRTC registers. If @base is %NULL, + * old-style I/O ports are queried for information, otherwise MMIO is + * used at the given @base address to query the information. + */ + +static void cirrusfb_dbg_print_regs(struct fb_info *info, + caddr_t regbase, + enum cirrusfb_dbg_reg_class reg_class, ...) +{ + va_list list; + unsigned char val = 0; + unsigned reg; + char *name; + + va_start(list, reg_class); + + name = va_arg(list, char *); + while (name != NULL) { + reg = va_arg(list, int); + + switch (reg_class) { + case CRT: + val = vga_rcrt(regbase, (unsigned char) reg); + break; + case SEQ: + val = vga_rseq(regbase, (unsigned char) reg); + break; + default: + /* should never occur */ + assert(false); + break; + } + + dev_dbg(info->device, "%8s = 0x%02X\n", name, val); + + name = va_arg(list, char *); + } + + va_end(list); +} + +/** + * cirrusfb_dbg_reg_dump + * @base: If using newmmio, the newmmio base address, otherwise %NULL + * + * DESCRIPTION: + * Dumps a list of interesting VGA and CIRRUSFB registers. If @base is %NULL, + * old-style I/O ports are queried for information, otherwise MMIO is + * used at the given @base address to query the information. + */ + +static void cirrusfb_dbg_reg_dump(struct fb_info *info, caddr_t regbase) +{ + dev_dbg(info->device, "VGA CRTC register dump:\n"); + + cirrusfb_dbg_print_regs(info, regbase, CRT, + "CR00", 0x00, + "CR01", 0x01, + "CR02", 0x02, + "CR03", 0x03, + "CR04", 0x04, + "CR05", 0x05, + "CR06", 0x06, + "CR07", 0x07, + "CR08", 0x08, + "CR09", 0x09, + "CR0A", 0x0A, + "CR0B", 0x0B, + "CR0C", 0x0C, + "CR0D", 0x0D, + "CR0E", 0x0E, + "CR0F", 0x0F, + "CR10", 0x10, + "CR11", 0x11, + "CR12", 0x12, + "CR13", 0x13, + "CR14", 0x14, + "CR15", 0x15, + "CR16", 0x16, + "CR17", 0x17, + "CR18", 0x18, + "CR22", 0x22, + "CR24", 0x24, + "CR26", 0x26, + "CR2D", 0x2D, + "CR2E", 0x2E, + "CR2F", 0x2F, + "CR30", 0x30, + "CR31", 0x31, + "CR32", 0x32, + "CR33", 0x33, + "CR34", 0x34, + "CR35", 0x35, + "CR36", 0x36, + "CR37", 0x37, + "CR38", 0x38, + "CR39", 0x39, + "CR3A", 0x3A, + "CR3B", 0x3B, + "CR3C", 0x3C, + "CR3D", 0x3D, + "CR3E", 0x3E, + "CR3F", 0x3F, + NULL); + + dev_dbg(info->device, "\n"); + + dev_dbg(info->device, "VGA SEQ register dump:\n"); + + cirrusfb_dbg_print_regs(info, regbase, SEQ, + "SR00", 0x00, + "SR01", 0x01, + "SR02", 0x02, + "SR03", 0x03, + "SR04", 0x04, + "SR08", 0x08, + "SR09", 0x09, + "SR0A", 0x0A, + "SR0B", 0x0B, + "SR0D", 0x0D, + "SR10", 0x10, + "SR11", 0x11, + "SR12", 0x12, + "SR13", 0x13, + "SR14", 0x14, + "SR15", 0x15, + "SR16", 0x16, + "SR17", 0x17, + "SR18", 0x18, + "SR19", 0x19, + "SR1A", 0x1A, + "SR1B", 0x1B, + "SR1C", 0x1C, + "SR1D", 0x1D, + "SR1E", 0x1E, + "SR1F", 0x1F, + NULL); + + dev_dbg(info->device, "\n"); +} + +#endif /* CIRRUSFB_DEBUG */ + |