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426 lines
11 KiB
426 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* HP300 Topcat framebuffer support (derived from macfb of all things) |
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* Phil Blundell <[email protected]> 1998 |
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* DIO-II, colour map and Catseye support by |
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* Kars de Jong <[email protected]>, May 2004. |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/string.h> |
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#include <linux/mm.h> |
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#include <linux/delay.h> |
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#include <linux/init.h> |
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#include <linux/fb.h> |
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#include <linux/dio.h> |
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#include <asm/io.h> |
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#include <linux/uaccess.h> |
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static struct fb_info fb_info = { |
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.fix = { |
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.id = "HP300 ", |
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.type = FB_TYPE_PACKED_PIXELS, |
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.visual = FB_VISUAL_PSEUDOCOLOR, |
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.accel = FB_ACCEL_NONE, |
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} |
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}; |
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static unsigned long fb_regs; |
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static unsigned char fb_bitmask; |
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#define TC_NBLANK 0x4080 |
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#define TC_WEN 0x4088 |
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#define TC_REN 0x408c |
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#define TC_FBEN 0x4090 |
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#define TC_PRR 0x40ea |
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/* These defines match the X window system */ |
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#define RR_CLEAR 0x0 |
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#define RR_COPY 0x3 |
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#define RR_NOOP 0x5 |
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#define RR_XOR 0x6 |
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#define RR_INVERT 0xa |
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#define RR_COPYINVERTED 0xc |
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#define RR_SET 0xf |
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/* blitter regs */ |
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#define BUSY 0x4044 |
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#define WMRR 0x40ef |
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#define SOURCE_X 0x40f2 |
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#define SOURCE_Y 0x40f6 |
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#define DEST_X 0x40fa |
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#define DEST_Y 0x40fe |
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#define WHEIGHT 0x4106 |
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#define WWIDTH 0x4102 |
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#define WMOVE 0x409c |
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static struct fb_var_screeninfo hpfb_defined = { |
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.red = { |
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.length = 8, |
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}, |
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.green = { |
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.length = 8, |
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}, |
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.blue = { |
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.length = 8, |
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}, |
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.activate = FB_ACTIVATE_NOW, |
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.height = -1, |
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.width = -1, |
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.vmode = FB_VMODE_NONINTERLACED, |
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}; |
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static int hpfb_setcolreg(unsigned regno, unsigned red, unsigned green, |
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unsigned blue, unsigned transp, |
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struct fb_info *info) |
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{ |
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/* use MSBs */ |
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unsigned char _red =red>>8; |
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unsigned char _green=green>>8; |
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unsigned char _blue =blue>>8; |
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unsigned char _regno=regno; |
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/* |
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* Set a single color register. The values supplied are |
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* already rounded down to the hardware's capabilities |
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* (according to the entries in the `var' structure). Return |
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* != 0 for invalid regno. |
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*/ |
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if (regno >= info->cmap.len) |
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return 1; |
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while (in_be16(fb_regs + 0x6002) & 0x4) udelay(1); |
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out_be16(fb_regs + 0x60ba, 0xff); |
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out_be16(fb_regs + 0x60b2, _red); |
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out_be16(fb_regs + 0x60b4, _green); |
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out_be16(fb_regs + 0x60b6, _blue); |
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out_be16(fb_regs + 0x60b8, ~_regno); |
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out_be16(fb_regs + 0x60f0, 0xff); |
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udelay(100); |
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while (in_be16(fb_regs + 0x6002) & 0x4) udelay(1); |
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out_be16(fb_regs + 0x60b2, 0); |
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out_be16(fb_regs + 0x60b4, 0); |
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out_be16(fb_regs + 0x60b6, 0); |
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out_be16(fb_regs + 0x60b8, 0); |
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return 0; |
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} |
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/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */ |
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static int hpfb_blank(int blank, struct fb_info *info) |
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{ |
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out_8(fb_regs + TC_NBLANK, (blank ? 0x00 : fb_bitmask)); |
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return 0; |
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} |
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static void topcat_blit(int x0, int y0, int x1, int y1, int w, int h, int rr) |
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{ |
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if (rr >= 0) { |
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while (in_8(fb_regs + BUSY) & fb_bitmask) |
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; |
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} |
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out_8(fb_regs + TC_FBEN, fb_bitmask); |
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if (rr >= 0) { |
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out_8(fb_regs + TC_WEN, fb_bitmask); |
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out_8(fb_regs + WMRR, rr); |
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} |
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out_be16(fb_regs + SOURCE_X, x0); |
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out_be16(fb_regs + SOURCE_Y, y0); |
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out_be16(fb_regs + DEST_X, x1); |
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out_be16(fb_regs + DEST_Y, y1); |
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out_be16(fb_regs + WWIDTH, w); |
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out_be16(fb_regs + WHEIGHT, h); |
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out_8(fb_regs + WMOVE, fb_bitmask); |
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} |
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static void hpfb_copyarea(struct fb_info *info, const struct fb_copyarea *area) |
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{ |
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topcat_blit(area->sx, area->sy, area->dx, area->dy, area->width, area->height, RR_COPY); |
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} |
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static void hpfb_fillrect(struct fb_info *p, const struct fb_fillrect *region) |
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{ |
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u8 clr; |
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clr = region->color & 0xff; |
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while (in_8(fb_regs + BUSY) & fb_bitmask) |
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; |
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/* Foreground */ |
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out_8(fb_regs + TC_WEN, fb_bitmask & clr); |
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out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_SET : RR_INVERT)); |
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/* Background */ |
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out_8(fb_regs + TC_WEN, fb_bitmask & ~clr); |
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out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_CLEAR : RR_NOOP)); |
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topcat_blit(region->dx, region->dy, region->dx, region->dy, region->width, region->height, -1); |
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} |
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static int hpfb_sync(struct fb_info *info) |
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{ |
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/* |
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* Since we also access the framebuffer directly, we have to wait |
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* until the block mover is finished |
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*/ |
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while (in_8(fb_regs + BUSY) & fb_bitmask) |
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; |
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out_8(fb_regs + TC_WEN, fb_bitmask); |
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out_8(fb_regs + TC_PRR, RR_COPY); |
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out_8(fb_regs + TC_FBEN, fb_bitmask); |
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return 0; |
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} |
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static const struct fb_ops hpfb_ops = { |
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.owner = THIS_MODULE, |
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.fb_setcolreg = hpfb_setcolreg, |
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.fb_blank = hpfb_blank, |
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.fb_fillrect = hpfb_fillrect, |
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.fb_copyarea = hpfb_copyarea, |
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.fb_imageblit = cfb_imageblit, |
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.fb_sync = hpfb_sync, |
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}; |
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/* Common to all HP framebuffers */ |
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#define HPFB_FBWMSB 0x05 /* Frame buffer width */ |
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#define HPFB_FBWLSB 0x07 |
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#define HPFB_FBHMSB 0x09 /* Frame buffer height */ |
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#define HPFB_FBHLSB 0x0b |
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#define HPFB_DWMSB 0x0d /* Display width */ |
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#define HPFB_DWLSB 0x0f |
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#define HPFB_DHMSB 0x11 /* Display height */ |
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#define HPFB_DHLSB 0x13 |
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#define HPFB_NUMPLANES 0x5b /* Number of colour planes */ |
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#define HPFB_FBOMSB 0x5d /* Frame buffer offset */ |
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#define HPFB_FBOLSB 0x5f |
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static int hpfb_init_one(unsigned long phys_base, unsigned long virt_base) |
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{ |
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unsigned long fboff, fb_width, fb_height, fb_start; |
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int ret; |
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fb_regs = virt_base; |
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fboff = (in_8(fb_regs + HPFB_FBOMSB) << 8) | in_8(fb_regs + HPFB_FBOLSB); |
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fb_info.fix.smem_start = (in_8(fb_regs + fboff) << 16); |
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if (phys_base >= DIOII_BASE) { |
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fb_info.fix.smem_start += phys_base; |
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} |
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if (DIO_SECID(fb_regs) != DIO_ID2_TOPCAT) { |
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/* This is the magic incantation the HP X server uses to make Catseye boards work. */ |
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while (in_be16(fb_regs+0x4800) & 1) |
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; |
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out_be16(fb_regs+0x4800, 0); /* Catseye status */ |
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out_be16(fb_regs+0x4510, 0); /* VB */ |
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out_be16(fb_regs+0x4512, 0); /* TCNTRL */ |
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out_be16(fb_regs+0x4514, 0); /* ACNTRL */ |
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out_be16(fb_regs+0x4516, 0); /* PNCNTRL */ |
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out_be16(fb_regs+0x4206, 0x90); /* RUG Command/Status */ |
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out_be16(fb_regs+0x60a2, 0); /* Overlay Mask */ |
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out_be16(fb_regs+0x60bc, 0); /* Ram Select */ |
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} |
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/* |
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* Fill in the available video resolution |
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*/ |
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fb_width = (in_8(fb_regs + HPFB_FBWMSB) << 8) | in_8(fb_regs + HPFB_FBWLSB); |
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fb_info.fix.line_length = fb_width; |
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fb_height = (in_8(fb_regs + HPFB_FBHMSB) << 8) | in_8(fb_regs + HPFB_FBHLSB); |
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fb_info.fix.smem_len = fb_width * fb_height; |
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fb_start = (unsigned long)ioremap_wt(fb_info.fix.smem_start, |
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fb_info.fix.smem_len); |
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hpfb_defined.xres = (in_8(fb_regs + HPFB_DWMSB) << 8) | in_8(fb_regs + HPFB_DWLSB); |
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hpfb_defined.yres = (in_8(fb_regs + HPFB_DHMSB) << 8) | in_8(fb_regs + HPFB_DHLSB); |
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hpfb_defined.xres_virtual = hpfb_defined.xres; |
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hpfb_defined.yres_virtual = hpfb_defined.yres; |
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hpfb_defined.bits_per_pixel = in_8(fb_regs + HPFB_NUMPLANES); |
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printk(KERN_INFO "hpfb: framebuffer at 0x%lx, mapped to 0x%lx, size %dk\n", |
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fb_info.fix.smem_start, fb_start, fb_info.fix.smem_len/1024); |
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printk(KERN_INFO "hpfb: mode is %dx%dx%d, linelength=%d\n", |
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hpfb_defined.xres, hpfb_defined.yres, hpfb_defined.bits_per_pixel, fb_info.fix.line_length); |
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/* |
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* Give the hardware a bit of a prod and work out how many bits per |
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* pixel are supported. |
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*/ |
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out_8(fb_regs + TC_WEN, 0xff); |
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out_8(fb_regs + TC_PRR, RR_COPY); |
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out_8(fb_regs + TC_FBEN, 0xff); |
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out_8(fb_start, 0xff); |
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fb_bitmask = in_8(fb_start); |
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out_8(fb_start, 0); |
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/* |
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* Enable reading/writing of all the planes. |
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*/ |
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out_8(fb_regs + TC_WEN, fb_bitmask); |
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out_8(fb_regs + TC_PRR, RR_COPY); |
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out_8(fb_regs + TC_REN, fb_bitmask); |
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out_8(fb_regs + TC_FBEN, fb_bitmask); |
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/* |
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* Clear the screen. |
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*/ |
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topcat_blit(0, 0, 0, 0, fb_width, fb_height, RR_CLEAR); |
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/* |
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* Let there be consoles.. |
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*/ |
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if (DIO_SECID(fb_regs) == DIO_ID2_TOPCAT) |
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strcat(fb_info.fix.id, "Topcat"); |
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else |
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strcat(fb_info.fix.id, "Catseye"); |
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fb_info.fbops = &hpfb_ops; |
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fb_info.flags = FBINFO_DEFAULT; |
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fb_info.var = hpfb_defined; |
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fb_info.screen_base = (char *)fb_start; |
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ret = fb_alloc_cmap(&fb_info.cmap, 1 << hpfb_defined.bits_per_pixel, 0); |
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if (ret < 0) |
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goto unmap_screen_base; |
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ret = register_framebuffer(&fb_info); |
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if (ret < 0) |
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goto dealloc_cmap; |
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fb_info(&fb_info, "%s frame buffer device\n", fb_info.fix.id); |
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return 0; |
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dealloc_cmap: |
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fb_dealloc_cmap(&fb_info.cmap); |
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unmap_screen_base: |
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if (fb_info.screen_base) { |
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iounmap(fb_info.screen_base); |
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fb_info.screen_base = NULL; |
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} |
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return ret; |
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} |
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/* |
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* Check that the secondary ID indicates that we have some hope of working with this |
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* framebuffer. The catseye boards are pretty much like topcats and we can muddle through. |
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*/ |
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#define topcat_sid_ok(x) (((x) == DIO_ID2_LRCATSEYE) || ((x) == DIO_ID2_HRCCATSEYE) \ |
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|| ((x) == DIO_ID2_HRMCATSEYE) || ((x) == DIO_ID2_TOPCAT)) |
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/* |
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* Initialise the framebuffer |
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*/ |
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static int hpfb_dio_probe(struct dio_dev *d, const struct dio_device_id *ent) |
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{ |
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unsigned long paddr, vaddr; |
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paddr = d->resource.start; |
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if (!request_mem_region(d->resource.start, resource_size(&d->resource), d->name)) |
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return -EBUSY; |
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if (d->scode >= DIOII_SCBASE) { |
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vaddr = (unsigned long)ioremap(paddr, resource_size(&d->resource)); |
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} else { |
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vaddr = paddr + DIO_VIRADDRBASE; |
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} |
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printk(KERN_INFO "Topcat found at DIO select code %d " |
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"(secondary id %02x)\n", d->scode, (d->id >> 8) & 0xff); |
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if (hpfb_init_one(paddr, vaddr)) { |
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if (d->scode >= DIOII_SCBASE) |
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iounmap((void *)vaddr); |
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return -ENOMEM; |
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} |
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return 0; |
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} |
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static void hpfb_remove_one(struct dio_dev *d) |
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{ |
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unregister_framebuffer(&fb_info); |
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if (d->scode >= DIOII_SCBASE) |
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iounmap((void *)fb_regs); |
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release_mem_region(d->resource.start, resource_size(&d->resource)); |
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fb_dealloc_cmap(&fb_info.cmap); |
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if (fb_info.screen_base) |
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iounmap(fb_info.screen_base); |
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} |
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static struct dio_device_id hpfb_dio_tbl[] = { |
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{ DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_LRCATSEYE) }, |
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{ DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_HRCCATSEYE) }, |
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{ DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_HRMCATSEYE) }, |
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{ DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_TOPCAT) }, |
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{ 0 } |
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}; |
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static struct dio_driver hpfb_driver = { |
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.name = "hpfb", |
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.id_table = hpfb_dio_tbl, |
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.probe = hpfb_dio_probe, |
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.remove = hpfb_remove_one, |
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}; |
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int __init hpfb_init(void) |
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{ |
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unsigned int sid; |
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unsigned char i; |
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int err; |
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/* Topcats can be on the internal IO bus or real DIO devices. |
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* The internal variant sits at 0x560000; it has primary |
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* and secondary ID registers just like the DIO version. |
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* So we merge the two detection routines. |
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* |
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* Perhaps this #define should be in a global header file: |
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* I believe it's common to all internal fbs, not just topcat. |
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*/ |
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#define INTFBVADDR 0xf0560000 |
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#define INTFBPADDR 0x560000 |
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if (!MACH_IS_HP300) |
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return -ENODEV; |
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if (fb_get_options("hpfb", NULL)) |
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return -ENODEV; |
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err = dio_register_driver(&hpfb_driver); |
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if (err) |
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return err; |
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err = copy_from_kernel_nofault(&i, (unsigned char *)INTFBVADDR + DIO_IDOFF, 1); |
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if (!err && (i == DIO_ID_FBUFFER) && topcat_sid_ok(sid = DIO_SECID(INTFBVADDR))) { |
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if (!request_mem_region(INTFBPADDR, DIO_DEVSIZE, "Internal Topcat")) |
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return -EBUSY; |
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printk(KERN_INFO "Internal Topcat found (secondary id %02x)\n", sid); |
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if (hpfb_init_one(INTFBPADDR, INTFBVADDR)) { |
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return -ENOMEM; |
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} |
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} |
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return 0; |
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} |
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void __exit hpfb_cleanup_module(void) |
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{ |
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dio_unregister_driver(&hpfb_driver); |
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} |
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module_init(hpfb_init); |
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module_exit(hpfb_cleanup_module); |
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MODULE_LICENSE("GPL");
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