summaryrefslogtreecommitdiff
path: root/drivers/char/drm/ffb_drv.c
blob: 5c121d6df9f2d4139d4ae76a7451bd6e826da216 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
/* $Id: ffb_drv.c,v 1.16 2001/10/18 16:00:24 davem Exp $
 * ffb_drv.c: Creator/Creator3D direct rendering driver.
 *
 * Copyright (C) 2000 David S. Miller (davem@redhat.com)
 */

#include <linux/config.h>
#include "ffb.h"
#include "drmP.h"

#include "ffb_drv.h"

#include <linux/sched.h>
#include <linux/smp_lock.h>
#include <asm/shmparam.h>
#include <asm/oplib.h>
#include <asm/upa.h>

#define DRIVER_AUTHOR		"David S. Miller"

#define DRIVER_NAME		"ffb"
#define DRIVER_DESC		"Creator/Creator3D"
#define DRIVER_DATE		"20000517"

#define DRIVER_MAJOR		0
#define DRIVER_MINOR		0
#define DRIVER_PATCHLEVEL	1

typedef struct _ffb_position_t {
	int node;
	int root;
} ffb_position_t;

static ffb_position_t *ffb_position;

static void get_ffb_type(ffb_dev_priv_t * ffb_priv, int instance)
{
	volatile unsigned char *strap_bits;
	unsigned char val;

	strap_bits = (volatile unsigned char *)
	    (ffb_priv->card_phys_base + 0x00200000UL);

	/* Don't ask, you have to read the value twice for whatever
	 * reason to get correct contents.
	 */
	val = upa_readb(strap_bits);
	val = upa_readb(strap_bits);
	switch (val & 0x78) {
	case (0x0 << 5) | (0x0 << 3):
		ffb_priv->ffb_type = ffb1_prototype;
		printk("ffb%d: Detected FFB1 pre-FCS prototype\n", instance);
		break;
	case (0x0 << 5) | (0x1 << 3):
		ffb_priv->ffb_type = ffb1_standard;
		printk("ffb%d: Detected FFB1\n", instance);
		break;
	case (0x0 << 5) | (0x3 << 3):
		ffb_priv->ffb_type = ffb1_speedsort;
		printk("ffb%d: Detected FFB1-SpeedSort\n", instance);
		break;
	case (0x1 << 5) | (0x0 << 3):
		ffb_priv->ffb_type = ffb2_prototype;
		printk("ffb%d: Detected FFB2/vertical pre-FCS prototype\n",
		       instance);
		break;
	case (0x1 << 5) | (0x1 << 3):
		ffb_priv->ffb_type = ffb2_vertical;
		printk("ffb%d: Detected FFB2/vertical\n", instance);
		break;
	case (0x1 << 5) | (0x2 << 3):
		ffb_priv->ffb_type = ffb2_vertical_plus;
		printk("ffb%d: Detected FFB2+/vertical\n", instance);
		break;
	case (0x2 << 5) | (0x0 << 3):
		ffb_priv->ffb_type = ffb2_horizontal;
		printk("ffb%d: Detected FFB2/horizontal\n", instance);
		break;
	case (0x2 << 5) | (0x2 << 3):
		ffb_priv->ffb_type = ffb2_horizontal;
		printk("ffb%d: Detected FFB2+/horizontal\n", instance);
		break;
	default:
		ffb_priv->ffb_type = ffb2_vertical;
		printk("ffb%d: Unknown boardID[%08x], assuming FFB2\n",
		       instance, val);
		break;
	};
}

static void ffb_apply_upa_parent_ranges(int parent,
					struct linux_prom64_registers *regs)
{
	struct linux_prom64_ranges ranges[PROMREG_MAX];
	char name[128];
	int len, i;

	prom_getproperty(parent, "name", name, sizeof(name));
	if (strcmp(name, "upa") != 0)
		return;

	len =
	    prom_getproperty(parent, "ranges", (void *)ranges, sizeof(ranges));
	if (len <= 0)
		return;

	len /= sizeof(struct linux_prom64_ranges);
	for (i = 0; i < len; i++) {
		struct linux_prom64_ranges *rng = &ranges[i];
		u64 phys_addr = regs->phys_addr;

		if (phys_addr >= rng->ot_child_base &&
		    phys_addr < (rng->ot_child_base + rng->or_size)) {
			regs->phys_addr -= rng->ot_child_base;
			regs->phys_addr += rng->ot_parent_base;
			return;
		}
	}

	return;
}

static int ffb_init_one(drm_device_t * dev, int prom_node, int parent_node,
			int instance)
{
	struct linux_prom64_registers regs[2 * PROMREG_MAX];
	ffb_dev_priv_t *ffb_priv = (ffb_dev_priv_t *) dev->dev_private;
	int i;

	ffb_priv->prom_node = prom_node;
	if (prom_getproperty(ffb_priv->prom_node, "reg",
			     (void *)regs, sizeof(regs)) <= 0) {
		return -EINVAL;
	}
	ffb_apply_upa_parent_ranges(parent_node, &regs[0]);
	ffb_priv->card_phys_base = regs[0].phys_addr;
	ffb_priv->regs = (ffb_fbcPtr)
	    (regs[0].phys_addr + 0x00600000UL);
	get_ffb_type(ffb_priv, instance);
	for (i = 0; i < FFB_MAX_CTXS; i++)
		ffb_priv->hw_state[i] = NULL;

	return 0;
}

static drm_map_t *ffb_find_map(struct file *filp, unsigned long off)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev;
	drm_map_list_t *r_list;
	struct list_head *list;
	drm_map_t *map;

	if (!priv || (dev = priv->dev) == NULL)
		return NULL;

	list_for_each(list, &dev->maplist->head) {
		r_list = (drm_map_list_t *) list;
		map = r_list->map;
		if (!map)
			continue;
		if (r_list->user_token == off)
			return map;
	}

	return NULL;
}

unsigned long ffb_get_unmapped_area(struct file *filp,
				    unsigned long hint,
				    unsigned long len,
				    unsigned long pgoff, unsigned long flags)
{
	drm_map_t *map = ffb_find_map(filp, pgoff << PAGE_SHIFT);
	unsigned long addr = -ENOMEM;

	if (!map)
		return get_unmapped_area(NULL, hint, len, pgoff, flags);

	if (map->type == _DRM_FRAME_BUFFER || map->type == _DRM_REGISTERS) {
#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
		addr = get_fb_unmapped_area(filp, hint, len, pgoff, flags);
#else
		addr = get_unmapped_area(NULL, hint, len, pgoff, flags);
#endif
	} else if (map->type == _DRM_SHM && SHMLBA > PAGE_SIZE) {
		unsigned long slack = SHMLBA - PAGE_SIZE;

		addr = get_unmapped_area(NULL, hint, len + slack, pgoff, flags);
		if (!(addr & ~PAGE_MASK)) {
			unsigned long kvirt = (unsigned long)map->handle;

			if ((kvirt & (SHMLBA - 1)) != (addr & (SHMLBA - 1))) {
				unsigned long koff, aoff;

				koff = kvirt & (SHMLBA - 1);
				aoff = addr & (SHMLBA - 1);
				if (koff < aoff)
					koff += SHMLBA;

				addr += (koff - aoff);
			}
		}
	} else {
		addr = get_unmapped_area(NULL, hint, len, pgoff, flags);
	}

	return addr;
}

static int ffb_presetup(drm_device_t * dev)
{
	ffb_dev_priv_t *ffb_priv;
	int ret = 0;
	int i = 0;

	/* Check for the case where no device was found. */
	if (ffb_position == NULL)
		return -ENODEV;

	/* code used to use numdevs no numdevs anymore */
	ffb_priv = kmalloc(sizeof(ffb_dev_priv_t), GFP_KERNEL);
	if (!ffb_priv)
		return -ENOMEM;
	memset(ffb_priv, 0, sizeof(*ffb_priv));
	dev->dev_private = ffb_priv;

	ret = ffb_init_one(dev, ffb_position[i].node, ffb_position[i].root, i);
	return ret;
}

static void ffb_driver_release(drm_device_t * dev, struct file *filp)
{
	ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) dev->dev_private;
	int context = _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock);
	int idx;

	idx = context - 1;
	if (fpriv &&
	    context != DRM_KERNEL_CONTEXT && fpriv->hw_state[idx] != NULL) {
		kfree(fpriv->hw_state[idx]);
		fpriv->hw_state[idx] = NULL;
	}
}

static void ffb_driver_pretakedown(drm_device_t * dev)
{
	if (dev->dev_private)
		kfree(dev->dev_private);
}

static int ffb_driver_postcleanup(drm_device_t * dev)
{
	if (ffb_position != NULL)
		kfree(ffb_position);
	return 0;
}

static void ffb_driver_kernel_context_switch_unlock(struct drm_device *dev,
						    drm_lock_t * lock)
{
	dev->lock.filp = 0;
	{
		__volatile__ unsigned int *plock = &dev->lock.hw_lock->lock;
		unsigned int old, new, prev, ctx;

		ctx = lock->context;
		do {
			old = *plock;
			new = ctx;
			prev = cmpxchg(plock, old, new);
		} while (prev != old);
	}
	wake_up_interruptible(&dev->lock.lock_queue);
}

static unsigned long ffb_driver_get_map_ofs(drm_map_t * map)
{
	return (map->offset & 0xffffffff);
}

static unsigned long ffb_driver_get_reg_ofs(drm_device_t * dev)
{
	ffb_dev_priv_t *ffb_priv = (ffb_dev_priv_t *) dev->dev_private;

	if (ffb_priv)
		return ffb_priv->card_phys_base;

	return 0;
}

static int postinit(struct drm_device *dev, unsigned long flags)
{
	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
		 DRIVER_NAME,
		 DRIVER_MAJOR,
		 DRIVER_MINOR, DRIVER_PATCHLEVEL, DRIVER_DATE, dev->minor);
	return 0;
}

static int version(drm_version_t * version)
{
	int len;

	version->version_major = DRIVER_MAJOR;
	version->version_minor = DRIVER_MINOR;
	version->version_patchlevel = DRIVER_PATCHLEVEL;
	DRM_COPY(version->name, DRIVER_NAME);
	DRM_COPY(version->date, DRIVER_DATE);
	DRM_COPY(version->desc, DRIVER_DESC);
	return 0;
}

static drm_ioctl_desc_t ioctls[] = {

};

static struct drm_driver driver = {
	.driver_features = 0,
	.dev_priv_size = sizeof(u32),
	.release = ffb_driver_release,
	.presetup = ffb_presetup,
	.pretakedown = ffb_driver_pretakedown,
	.postcleanup = ffb_driver_postcleanup,
	.kernel_context_switch = ffb_driver_context_switch,
	.kernel_context_switch_unlock = ffb_driver_kernel_context_switch_unlock,
	.get_map_ofs = ffb_driver_get_map_ofs,
	.get_reg_ofs = ffb_driver_get_reg_ofs,
	.postinit = postinit,
	.version = version,
	.ioctls = ioctls,
	.num_ioctls = DRM_ARRAY_SIZE(ioctls),
	.fops = {
		 .owner = THIS_MODULE,
		 .open = drm_open,
		 .release = drm_release,
		 .ioctl = drm_ioctl,
		 .mmap = drm_mmap,
		 .poll = drm_poll,
		 .fasync = drm_fasync,
		 }
	,
};

static int __init ffb_init(void)
{
	return -ENODEV;
}

static void __exit ffb_exit(void)
{
}

module_init(ffb_init);
module_exit(ffb_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL and additional rights");