1 #include <linux/kernel.h> 2 #include <linux/errno.h> 3 #include <linux/string.h> 4 #include <linux/mm.h> 5 #include <linux/delay.h> 6 #include <linux/interrupt.h> 7 #include <linux/platform_device.h> 8 9 #include <asm/setup.h> 10 #include <asm/irq.h> 11 #include <asm/amigahw.h> 12 #include <asm/amigaints.h> 13 #include <asm/apollohw.h> 14 #include <linux/fb.h> 15 #include <linux/module.h> 16 17 /* apollo video HW definitions */ 18 19 /* 20 * Control Registers. IOBASE + $x 21 * 22 * Note: these are the Memory/IO BASE definitions for a mono card set to the 23 * alternate address 24 * 25 * Control 3A and 3B serve identical functions except that 3A 26 * deals with control 1 and 3b deals with Color LUT reg. 27 */ 28 29 #define AP_IOBASE 0x3b0 /* Base address of 1 plane board. */ 30 #define AP_STATUS isaIO2mem(AP_IOBASE+0) /* Status register. Read */ 31 #define AP_WRITE_ENABLE isaIO2mem(AP_IOBASE+0) /* Write Enable Register Write */ 32 #define AP_DEVICE_ID isaIO2mem(AP_IOBASE+1) /* Device ID Register. Read */ 33 #define AP_ROP_1 isaIO2mem(AP_IOBASE+2) /* Raster Operation reg. Write Word */ 34 #define AP_DIAG_MEM_REQ isaIO2mem(AP_IOBASE+4) /* Diagnostic Memory Request. Write Word */ 35 #define AP_CONTROL_0 isaIO2mem(AP_IOBASE+8) /* Control Register 0. Read/Write */ 36 #define AP_CONTROL_1 isaIO2mem(AP_IOBASE+0xa) /* Control Register 1. Read/Write */ 37 #define AP_CONTROL_3A isaIO2mem(AP_IOBASE+0xe) /* Control Register 3a. Read/Write */ 38 #define AP_CONTROL_2 isaIO2mem(AP_IOBASE+0xc) /* Control Register 2. Read/Write */ 39 40 41 #define FRAME_BUFFER_START 0x0FA0000 42 #define FRAME_BUFFER_LEN 0x40000 43 44 /* CREG 0 */ 45 #define VECTOR_MODE 0x40 /* 010x.xxxx */ 46 #define DBLT_MODE 0x80 /* 100x.xxxx */ 47 #define NORMAL_MODE 0xE0 /* 111x.xxxx */ 48 #define SHIFT_BITS 0x1F /* xxx1.1111 */ 49 /* other bits are Shift value */ 50 51 /* CREG 1 */ 52 #define AD_BLT 0x80 /* 1xxx.xxxx */ 53 #define NORMAL 0x80 /* 1xxx.xxxx */ /* What is happening here ?? */ 54 #define INVERSE 0x00 /* 0xxx.xxxx */ /* Clearing this reverses the screen */ 55 #define PIX_BLT 0x00 /* 0xxx.xxxx */ 56 57 #define AD_HIBIT 0x40 /* xIxx.xxxx */ 58 59 #define ROP_EN 0x10 /* xxx1.xxxx */ 60 #define DST_EQ_SRC 0x00 /* xxx0.xxxx */ 61 #define nRESET_SYNC 0x08 /* xxxx.1xxx */ 62 #define SYNC_ENAB 0x02 /* xxxx.xx1x */ 63 64 #define BLANK_DISP 0x00 /* xxxx.xxx0 */ 65 #define ENAB_DISP 0x01 /* xxxx.xxx1 */ 66 67 #define NORM_CREG1 (nRESET_SYNC | SYNC_ENAB | ENAB_DISP) /* no reset sync */ 68 69 /* CREG 2 */ 70 71 /* 72 * Following 3 defines are common to 1, 4 and 8 plane. 73 */ 74 75 #define S_DATA_1s 0x00 /* 00xx.xxxx */ /* set source to all 1's -- vector drawing */ 76 #define S_DATA_PIX 0x40 /* 01xx.xxxx */ /* takes source from ls-bits and replicates over 16 bits */ 77 #define S_DATA_PLN 0xC0 /* 11xx.xxxx */ /* normal, each data access =16-bits in 78 one plane of image mem */ 79 80 /* CREG 3A/CREG 3B */ 81 # define RESET_CREG 0x80 /* 1000.0000 */ 82 83 /* ROP REG - all one nibble */ 84 /* ********* NOTE : this is used r0,r1,r2,r3 *********** */ 85 #define ROP(r2,r3,r0,r1) ( (U_SHORT)((r0)|((r1)<<4)|((r2)<<8)|((r3)<<12)) ) 86 #define DEST_ZERO 0x0 87 #define SRC_AND_DEST 0x1 88 #define SRC_AND_nDEST 0x2 89 #define SRC 0x3 90 #define nSRC_AND_DEST 0x4 91 #define DEST 0x5 92 #define SRC_XOR_DEST 0x6 93 #define SRC_OR_DEST 0x7 94 #define SRC_NOR_DEST 0x8 95 #define SRC_XNOR_DEST 0x9 96 #define nDEST 0xA 97 #define SRC_OR_nDEST 0xB 98 #define nSRC 0xC 99 #define nSRC_OR_DEST 0xD 100 #define SRC_NAND_DEST 0xE 101 #define DEST_ONE 0xF 102 103 #define SWAP(A) ((A>>8) | ((A&0xff) <<8)) 104 105 /* frame buffer operations */ 106 107 static int dnfb_blank(int blank, struct fb_info *info); 108 static void dnfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); 109 110 static struct fb_ops dn_fb_ops = { 111 .owner = THIS_MODULE, 112 .fb_blank = dnfb_blank, 113 .fb_fillrect = cfb_fillrect, 114 .fb_copyarea = dnfb_copyarea, 115 .fb_imageblit = cfb_imageblit, 116 }; 117 118 static const struct fb_var_screeninfo dnfb_var = { 119 .xres = 1280, 120 .yres = 1024, 121 .xres_virtual = 2048, 122 .yres_virtual = 1024, 123 .bits_per_pixel = 1, 124 .height = -1, 125 .width = -1, 126 .vmode = FB_VMODE_NONINTERLACED, 127 }; 128 129 static const struct fb_fix_screeninfo dnfb_fix = { 130 .id = "Apollo Mono", 131 .smem_start = (FRAME_BUFFER_START + IO_BASE), 132 .smem_len = FRAME_BUFFER_LEN, 133 .type = FB_TYPE_PACKED_PIXELS, 134 .visual = FB_VISUAL_MONO10, 135 .line_length = 256, 136 }; 137 138 static int dnfb_blank(int blank, struct fb_info *info) 139 { 140 if (blank) 141 out_8(AP_CONTROL_3A, 0x0); 142 else 143 out_8(AP_CONTROL_3A, 0x1); 144 return 0; 145 } 146 147 static 148 void dnfb_copyarea(struct fb_info *info, const struct fb_copyarea *area) 149 { 150 151 int incr, y_delta, pre_read = 0, x_end, x_word_count; 152 uint start_mask, end_mask, dest; 153 ushort *src, dummy; 154 short i, j; 155 156 incr = (area->dy <= area->sy) ? 1 : -1; 157 158 src = (ushort *)(info->screen_base + area->sy * info->fix.line_length + 159 (area->sx >> 4)); 160 dest = area->dy * (info->fix.line_length >> 1) + (area->dx >> 4); 161 162 if (incr > 0) { 163 y_delta = (info->fix.line_length * 8) - area->sx - area->width; 164 x_end = area->dx + area->width - 1; 165 x_word_count = (x_end >> 4) - (area->dx >> 4) + 1; 166 start_mask = 0xffff0000 >> (area->dx & 0xf); 167 end_mask = 0x7ffff >> (x_end & 0xf); 168 out_8(AP_CONTROL_0, 169 (((area->dx & 0xf) - (area->sx & 0xf)) % 16) | (0x4 << 5)); 170 if ((area->dx & 0xf) < (area->sx & 0xf)) 171 pre_read = 1; 172 } else { 173 y_delta = -((info->fix.line_length * 8) - area->sx - area->width); 174 x_end = area->dx - area->width + 1; 175 x_word_count = (area->dx >> 4) - (x_end >> 4) + 1; 176 start_mask = 0x7ffff >> (area->dx & 0xf); 177 end_mask = 0xffff0000 >> (x_end & 0xf); 178 out_8(AP_CONTROL_0, 179 ((-((area->sx & 0xf) - (area->dx & 0xf))) % 16) | 180 (0x4 << 5)); 181 if ((area->dx & 0xf) > (area->sx & 0xf)) 182 pre_read = 1; 183 } 184 185 for (i = 0; i < area->height; i++) { 186 187 out_8(AP_CONTROL_3A, 0xc | (dest >> 16)); 188 189 if (pre_read) { 190 dummy = *src; 191 src += incr; 192 } 193 194 if (x_word_count) { 195 out_8(AP_WRITE_ENABLE, start_mask); 196 *src = dest; 197 src += incr; 198 dest += incr; 199 out_8(AP_WRITE_ENABLE, 0); 200 201 for (j = 1; j < (x_word_count - 1); j++) { 202 *src = dest; 203 src += incr; 204 dest += incr; 205 } 206 207 out_8(AP_WRITE_ENABLE, start_mask); 208 *src = dest; 209 dest += incr; 210 src += incr; 211 } else { 212 out_8(AP_WRITE_ENABLE, start_mask | end_mask); 213 *src = dest; 214 dest += incr; 215 src += incr; 216 } 217 src += (y_delta / 16); 218 dest += (y_delta / 16); 219 } 220 out_8(AP_CONTROL_0, NORMAL_MODE); 221 } 222 223 /* 224 * Initialization 225 */ 226 227 static int dnfb_probe(struct platform_device *dev) 228 { 229 struct fb_info *info; 230 int err = 0; 231 232 info = framebuffer_alloc(0, &dev->dev); 233 if (!info) 234 return -ENOMEM; 235 236 info->fbops = &dn_fb_ops; 237 info->fix = dnfb_fix; 238 info->var = dnfb_var; 239 info->var.red.length = 1; 240 info->var.red.offset = 0; 241 info->var.green = info->var.blue = info->var.red; 242 info->screen_base = (u_char *) info->fix.smem_start; 243 244 err = fb_alloc_cmap(&info->cmap, 2, 0); 245 if (err < 0) 246 goto release_framebuffer; 247 248 err = register_framebuffer(info); 249 if (err < 0) { 250 fb_dealloc_cmap(&info->cmap); 251 goto release_framebuffer; 252 } 253 platform_set_drvdata(dev, info); 254 255 /* now we have registered we can safely setup the hardware */ 256 out_8(AP_CONTROL_3A, RESET_CREG); 257 out_be16(AP_WRITE_ENABLE, 0x0); 258 out_8(AP_CONTROL_0, NORMAL_MODE); 259 out_8(AP_CONTROL_1, (AD_BLT | DST_EQ_SRC | NORM_CREG1)); 260 out_8(AP_CONTROL_2, S_DATA_PLN); 261 out_be16(AP_ROP_1, SWAP(0x3)); 262 263 printk("apollo frame buffer alive and kicking !\n"); 264 return err; 265 266 release_framebuffer: 267 framebuffer_release(info); 268 return err; 269 } 270 271 static struct platform_driver dnfb_driver = { 272 .probe = dnfb_probe, 273 .driver = { 274 .name = "dnfb", 275 }, 276 }; 277 278 static struct platform_device dnfb_device = { 279 .name = "dnfb", 280 }; 281 282 int __init dnfb_init(void) 283 { 284 int ret; 285 286 if (!MACH_IS_APOLLO) 287 return -ENODEV; 288 289 if (fb_get_options("dnfb", NULL)) 290 return -ENODEV; 291 292 ret = platform_driver_register(&dnfb_driver); 293 294 if (!ret) { 295 ret = platform_device_register(&dnfb_device); 296 if (ret) 297 platform_driver_unregister(&dnfb_driver); 298 } 299 return ret; 300 } 301 302 module_init(dnfb_init); 303 304 MODULE_LICENSE("GPL"); 305