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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308// SPDX-License-Identifier: GPL-2.0-only#include <linux/kernel.h>#include <linux/errno.h>#include <linux/string.h>#include <linux/mm.h>#include <linux/delay.h>#include <linux/interrupt.h>#include <linux/platform_device.h>
#include <asm/setup.h>#include <asm/irq.h>#include <asm/amigahw.h>#include <asm/amigaints.h>#include <asm/apollohw.h>#include <linux/fb.h>#include <linux/module.h>
/* apollo video HW definitions */
/* * Control Registers. IOBASE + $x * * Note: these are the Memory/IO BASE definitions for a mono card set to the * alternate address * * Control 3A and 3B serve identical functions except that 3A * deals with control 1 and 3b deals with Color LUT reg. */
#define AP_IOBASE 0x3b0 /* Base address of 1 plane board. */#define AP_STATUS isaIO2mem(AP_IOBASE+0) /* Status register. Read */#define AP_WRITE_ENABLE isaIO2mem(AP_IOBASE+0) /* Write Enable Register Write */#define AP_DEVICE_ID isaIO2mem(AP_IOBASE+1) /* Device ID Register. Read */#define AP_ROP_1 isaIO2mem(AP_IOBASE+2) /* Raster Operation reg. Write Word */#define AP_DIAG_MEM_REQ isaIO2mem(AP_IOBASE+4) /* Diagnostic Memory Request. Write Word */#define AP_CONTROL_0 isaIO2mem(AP_IOBASE+8) /* Control Register 0. Read/Write */#define AP_CONTROL_1 isaIO2mem(AP_IOBASE+0xa) /* Control Register 1. Read/Write */#define AP_CONTROL_3A isaIO2mem(AP_IOBASE+0xe) /* Control Register 3a. Read/Write */#define AP_CONTROL_2 isaIO2mem(AP_IOBASE+0xc) /* Control Register 2. Read/Write */
#define FRAME_BUFFER_START 0x0FA0000#define FRAME_BUFFER_LEN 0x40000
/* CREG 0 */#define VECTOR_MODE 0x40 /* 010x.xxxx */#define DBLT_MODE 0x80 /* 100x.xxxx */#define NORMAL_MODE 0xE0 /* 111x.xxxx */#define SHIFT_BITS 0x1F /* xxx1.1111 */ /* other bits are Shift value */
/* CREG 1 */#define AD_BLT 0x80 /* 1xxx.xxxx */#define NORMAL 0x80 /* 1xxx.xxxx */ /* What is happening here ?? */#define INVERSE 0x00 /* 0xxx.xxxx */ /* Clearing this reverses the screen */#define PIX_BLT 0x00 /* 0xxx.xxxx */
#define AD_HIBIT 0x40 /* xIxx.xxxx */
#define ROP_EN 0x10 /* xxx1.xxxx */#define DST_EQ_SRC 0x00 /* xxx0.xxxx */#define nRESET_SYNC 0x08 /* xxxx.1xxx */#define SYNC_ENAB 0x02 /* xxxx.xx1x */
#define BLANK_DISP 0x00 /* xxxx.xxx0 */#define ENAB_DISP 0x01 /* xxxx.xxx1 */
#define NORM_CREG1 (nRESET_SYNC | SYNC_ENAB | ENAB_DISP) /* no reset sync */
/* CREG 2 */
/* * Following 3 defines are common to 1, 4 and 8 plane. */
#define S_DATA_1s 0x00 /* 00xx.xxxx */ /* set source to all 1's -- vector drawing */#define S_DATA_PIX 0x40 /* 01xx.xxxx */ /* takes source from ls-bits and replicates over 16 bits */#define S_DATA_PLN 0xC0 /* 11xx.xxxx */ /* normal, each data access =16-bits in one plane of image mem */
/* CREG 3A/CREG 3B */# define RESET_CREG 0x80 /* 1000.0000 */
/* ROP REG - all one nibble *//* ********* NOTE : this is used r0,r1,r2,r3 *********** */#define ROP(r2,r3,r0,r1) ( (U_SHORT)((r0)|((r1)<<4)|((r2)<<8)|((r3)<<12)) )#define DEST_ZERO 0x0#define SRC_AND_DEST 0x1#define SRC_AND_nDEST 0x2#define SRC 0x3#define nSRC_AND_DEST 0x4#define DEST 0x5#define SRC_XOR_DEST 0x6#define SRC_OR_DEST 0x7#define SRC_NOR_DEST 0x8#define SRC_XNOR_DEST 0x9#define nDEST 0xA#define SRC_OR_nDEST 0xB#define nSRC 0xC#define nSRC_OR_DEST 0xD#define SRC_NAND_DEST 0xE#define DEST_ONE 0xF
#define SWAP(A) ((A>>8) | ((A&0xff) <<8))
/* frame buffer operations */
static int dnfb_blank(int blank, struct fb_info *info);static void dnfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
static const struct fb_ops dn_fb_ops = { .owner = THIS_MODULE, __FB_DEFAULT_IOMEM_OPS_RDWR, .fb_blank = dnfb_blank, .fb_fillrect = cfb_fillrect, .fb_copyarea = dnfb_copyarea, .fb_imageblit = cfb_imageblit, __FB_DEFAULT_IOMEM_OPS_MMAP,};
static const struct fb_var_screeninfo dnfb_var = { .xres = 1280, .yres = 1024, .xres_virtual = 2048, .yres_virtual = 1024, .bits_per_pixel = 1, .height = -1, .width = -1, .vmode = FB_VMODE_NONINTERLACED,};
static const struct fb_fix_screeninfo dnfb_fix = { .id = "Apollo Mono", .smem_start = (FRAME_BUFFER_START + IO_BASE), .smem_len = FRAME_BUFFER_LEN, .type = FB_TYPE_PACKED_PIXELS, .visual = FB_VISUAL_MONO10, .line_length = 256,};
static int dnfb_blank(int blank, struct fb_info *info){ if (blank) out_8(AP_CONTROL_3A, 0x0); else out_8(AP_CONTROL_3A, 0x1); return 0;}
staticvoid dnfb_copyarea(struct fb_info *info, const struct fb_copyarea *area){
int incr, y_delta, pre_read = 0, x_end, x_word_count; uint start_mask, end_mask, dest; ushort *src, dummy; short i, j;
incr = (area->dy <= area->sy) ? 1 : -1;
src = (ushort *)(info->screen_base + area->sy * info->fix.line_length + (area->sx >> 4)); dest = area->dy * (info->fix.line_length >> 1) + (area->dx >> 4);
if (incr > 0) { y_delta = (info->fix.line_length * 8) - area->sx - area->width; x_end = area->dx + area->width - 1; x_word_count = (x_end >> 4) - (area->dx >> 4) + 1; start_mask = 0xffff0000 >> (area->dx & 0xf); end_mask = 0x7ffff >> (x_end & 0xf); out_8(AP_CONTROL_0, (((area->dx & 0xf) - (area->sx & 0xf)) % 16) | (0x4 << 5)); if ((area->dx & 0xf) < (area->sx & 0xf)) pre_read = 1; } else { y_delta = -((info->fix.line_length * 8) - area->sx - area->width); x_end = area->dx - area->width + 1; x_word_count = (area->dx >> 4) - (x_end >> 4) + 1; start_mask = 0x7ffff >> (area->dx & 0xf); end_mask = 0xffff0000 >> (x_end & 0xf); out_8(AP_CONTROL_0, ((-((area->sx & 0xf) - (area->dx & 0xf))) % 16) | (0x4 << 5)); if ((area->dx & 0xf) > (area->sx & 0xf)) pre_read = 1; }
for (i = 0; i < area->height; i++) {
out_8(AP_CONTROL_3A, 0xc | (dest >> 16));
if (pre_read) { dummy = *src; src += incr; }
if (x_word_count) { out_8(AP_WRITE_ENABLE, start_mask); *src = dest; src += incr; dest += incr; out_8(AP_WRITE_ENABLE, 0);
for (j = 1; j < (x_word_count - 1); j++) { *src = dest; src += incr; dest += incr; }
out_8(AP_WRITE_ENABLE, start_mask); *src = dest; dest += incr; src += incr; } else { out_8(AP_WRITE_ENABLE, start_mask | end_mask); *src = dest; dest += incr; src += incr; } src += (y_delta / 16); dest += (y_delta / 16); } out_8(AP_CONTROL_0, NORMAL_MODE);}
/* * Initialization */
static int dnfb_probe(struct platform_device *dev){ struct fb_info *info; int err = 0;
info = framebuffer_alloc(0, &dev->dev); if (!info) return -ENOMEM;
info->fbops = &dn_fb_ops; info->fix = dnfb_fix; info->var = dnfb_var; info->var.red.length = 1; info->var.red.offset = 0; info->var.green = info->var.blue = info->var.red; info->screen_base = (u_char *) info->fix.smem_start;
err = fb_alloc_cmap(&info->cmap, 2, 0); if (err < 0) goto release_framebuffer;
err = register_framebuffer(info); if (err < 0) { fb_dealloc_cmap(&info->cmap); goto release_framebuffer; } platform_set_drvdata(dev, info);
/* now we have registered we can safely setup the hardware */ out_8(AP_CONTROL_3A, RESET_CREG); out_be16(AP_WRITE_ENABLE, 0x0); out_8(AP_CONTROL_0, NORMAL_MODE); out_8(AP_CONTROL_1, (AD_BLT | DST_EQ_SRC | NORM_CREG1)); out_8(AP_CONTROL_2, S_DATA_PLN); out_be16(AP_ROP_1, SWAP(0x3));
printk("apollo frame buffer alive and kicking !\n"); return err;
release_framebuffer: framebuffer_release(info); return err;}
static struct platform_driver dnfb_driver = { .probe = dnfb_probe, .driver = { .name = "dnfb", },};
static struct platform_device dnfb_device = { .name = "dnfb",};
static int __init dnfb_init(void){ int ret;
if (!MACH_IS_APOLLO) return -ENODEV;
if (fb_get_options("dnfb", NULL)) return -ENODEV;
ret = platform_driver_register(&dnfb_driver);
if (!ret) { ret = platform_device_register(&dnfb_device); if (ret) platform_driver_unregister(&dnfb_driver); } return ret;}
module_init(dnfb_init);
MODULE_LICENSE("GPL");