blob: 3526899da61b93e2c40532b6edb337cc5be53300 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/kernel.h>
2#include <linux/errno.h>
3#include <linux/string.h>
4#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#include <linux/delay.h>
6#include <linux/interrupt.h>
Russell Kingd052d1b2005-10-29 19:07:23 +01007#include <linux/platform_device.h>
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <asm/setup.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#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
107static int dnfb_blank(int blank, struct fb_info *info);
108static void dnfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
109
110static 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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116};
117
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -0800118struct fb_var_screeninfo dnfb_var = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 .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
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -0800129static struct fb_fix_screeninfo dnfb_fix = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 .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
138static 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
147static
148void 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
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -0800227static int dnfb_probe(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 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 framebuffer_release(info);
247 return err;
248 }
249
250 err = register_framebuffer(info);
251 if (err < 0) {
252 fb_dealloc_cmap(&info->cmap);
253 framebuffer_release(info);
254 return err;
255 }
Russell King3ae5eae2005-11-09 22:32:44 +0000256 platform_set_drvdata(dev, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
258 /* now we have registered we can safely setup the hardware */
259 out_8(AP_CONTROL_3A, RESET_CREG);
260 out_be16(AP_WRITE_ENABLE, 0x0);
261 out_8(AP_CONTROL_0, NORMAL_MODE);
262 out_8(AP_CONTROL_1, (AD_BLT | DST_EQ_SRC | NORM_CREG1));
263 out_8(AP_CONTROL_2, S_DATA_PLN);
264 out_be16(AP_ROP_1, SWAP(0x3));
265
266 printk("apollo frame buffer alive and kicking !\n");
267 return err;
268}
269
Russell King3ae5eae2005-11-09 22:32:44 +0000270static struct platform_driver dnfb_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 .probe = dnfb_probe,
Russell King3ae5eae2005-11-09 22:32:44 +0000272 .driver = {
273 .name = "dnfb",
274 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275};
276
277static struct platform_device dnfb_device = {
278 .name = "dnfb",
279};
280
281int __init dnfb_init(void)
282{
283 int ret;
284
Geert Uytterhoevend6497702008-05-18 20:47:15 +0200285 if (!MACH_IS_APOLLO)
286 return -ENODEV;
287
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 if (fb_get_options("dnfb", NULL))
289 return -ENODEV;
290
Russell King3ae5eae2005-11-09 22:32:44 +0000291 ret = platform_driver_register(&dnfb_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
293 if (!ret) {
294 ret = platform_device_register(&dnfb_device);
295 if (ret)
Russell King3ae5eae2005-11-09 22:32:44 +0000296 platform_driver_unregister(&dnfb_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 }
298 return ret;
299}
300
301module_init(dnfb_init);
302
303MODULE_LICENSE("GPL");