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