aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb/b2c2/flexcop-sram.c
blob: 01570ec80962ea7628596cb9fef36d615807b3e3 (plain) (blame)
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
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
/*
 * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
 *
 * flexcop-sram.c - functions for controlling the SRAM.
 *
 * see flexcop.c for copyright information.
 */
#include "flexcop.h"

static void flexcop_sram_set_chip (struct flexcop_device *fc, flexcop_sram_type_t type)
{
	flexcop_set_ibi_value(wan_ctrl_reg_71c,sram_chip,type);
}

int flexcop_sram_init(struct flexcop_device *fc)
{
	switch (fc->rev) {
		case FLEXCOP_II:
		case FLEXCOP_IIB:
			flexcop_sram_set_chip(fc,FC_SRAM_1_32KB);
			break;
		case FLEXCOP_III:
			flexcop_sram_set_chip(fc,FC_SRAM_1_48KB);
			break;
		default:
			return -EINVAL;
	}
	return 0;
}

int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest, flexcop_sram_dest_target_t target)
{
	flexcop_ibi_value v;

	v = fc->read_ibi_reg(fc,sram_dest_reg_714);

	if (fc->rev != FLEXCOP_III && target == FC_SRAM_DEST_TARGET_FC3_CA) {
		err("SRAM destination target to available on FlexCopII(b)\n");
		return -EINVAL;
	}

	deb_sram("sram dest: %x target: %x\n",dest, target);

	if (dest & FC_SRAM_DEST_NET)
		v.sram_dest_reg_714.NET_Dest = target;
	if (dest & FC_SRAM_DEST_CAI)
		v.sram_dest_reg_714.CAI_Dest = target;
	if (dest & FC_SRAM_DEST_CAO)
		v.sram_dest_reg_714.CAO_Dest = target;
	if (dest & FC_SRAM_DEST_MEDIA)
		v.sram_dest_reg_714.MEDIA_Dest = target;

	fc->write_ibi_reg(fc,sram_dest_reg_714,v);
	udelay(1000); /* TODO delay really necessary */

	return 0;
}
EXPORT_SYMBOL(flexcop_sram_set_dest);

void flexcop_wan_set_speed(struct flexcop_device *fc, flexcop_wan_speed_t s)
{
	flexcop_set_ibi_value(wan_ctrl_reg_71c,wan_speed_sig,s);
}
EXPORT_SYMBOL(flexcop_wan_set_speed);

void flexcop_sram_ctrl(struct flexcop_device *fc, int usb_wan, int sramdma, int maximumfill)
{
	flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
	v.sram_dest_reg_714.ctrl_usb_wan = usb_wan;
	v.sram_dest_reg_714.ctrl_sramdma = sramdma;
	v.sram_dest_reg_714.ctrl_maximumfill = maximumfill;
	fc->write_ibi_reg(fc,sram_dest_reg_714,v);
}
EXPORT_SYMBOL(flexcop_sram_ctrl);

#if 0
static void flexcop_sram_write(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
{
	int i, retries;
	u32 command;

	for (i = 0; i < len; i++) {
		command = bank | addr | 0x04000000 | (*buf << 0x10);

		retries = 2;

		while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
			mdelay(1);
			retries--;
		};

		if (retries == 0)
			printk("%s: SRAM timeout\n", __FUNCTION__);

		write_reg_dw(adapter, 0x700, command);

		buf++;
		addr++;
	}
}

static void flex_sram_read(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
{
	int i, retries;
	u32 command, value;

	for (i = 0; i < len; i++) {
		command = bank | addr | 0x04008000;

		retries = 10000;

		while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
			mdelay(1);
			retries--;
		};

		if (retries == 0)
			printk("%s: SRAM timeout\n", __FUNCTION__);

		write_reg_dw(adapter, 0x700, command);

		retries = 10000;

		while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
			mdelay(1);
			retries--;
		};

		if (retries == 0)
			printk("%s: SRAM timeout\n", __FUNCTION__);

		value = read_reg_dw(adapter, 0x700) >> 0x10;

		*buf = (value & 0xff);

		addr++;
		buf++;
	}
}

static void sram_write_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
{
	u32 bank;

	bank = 0;

	if (adapter->dw_sram_type == 0x20000) {
		bank = (addr & 0x18000) << 0x0d;
	}

	if (adapter->dw_sram_type == 0x00000) {
		if ((addr >> 0x0f) == 0)
			bank = 0x20000000;
		else
			bank = 0x10000000;
	}

	flex_sram_write(adapter, bank, addr & 0x7fff, buf, len);
}

static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
{
	u32 bank;

	bank = 0;

	if (adapter->dw_sram_type == 0x20000) {
		bank = (addr & 0x18000) << 0x0d;
	}

	if (adapter->dw_sram_type == 0x00000) {
		if ((addr >> 0x0f) == 0)
			bank = 0x20000000;
		else
			bank = 0x10000000;
	}

	flex_sram_read(adapter, bank, addr & 0x7fff, buf, len);
}

static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
{
	u32 length;

	while (len != 0) {
		length = len;

		// check if the address range belongs to the same
		// 32K memory chip. If not, the data is read from
		// one chip at a time.
		if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
			length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
		}

		sram_read_chunk(adapter, addr, buf, length);

		addr = addr + length;
		buf = buf + length;
		len = len - length;
	}
}

static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
{
	u32 length;

	while (len != 0) {
		length = len;

		// check if the address range belongs to the same
		// 32K memory chip. If not, the data is written to
		// one chip at a time.
		if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
			length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
		}

		sram_write_chunk(adapter, addr, buf, length);

		addr = addr + length;
		buf = buf + length;
		len = len - length;
	}
}

static void sram_set_size(struct adapter *adapter, u32 mask)
{
	write_reg_dw(adapter, 0x71c, (mask | (~0x30000 & read_reg_dw(adapter, 0x71c))));
}

static void sram_init(struct adapter *adapter)
{
	u32 tmp;

	tmp = read_reg_dw(adapter, 0x71c);

	write_reg_dw(adapter, 0x71c, 1);

	if (read_reg_dw(adapter, 0x71c) != 0) {
		write_reg_dw(adapter, 0x71c, tmp);

		adapter->dw_sram_type = tmp & 0x30000;

		ddprintk("%s: dw_sram_type = %x\n", __FUNCTION__, adapter->dw_sram_type);

	} else {

		adapter->dw_sram_type = 0x10000;

		ddprintk("%s: dw_sram_type = %x\n", __FUNCTION__, adapter->dw_sram_type);
	}

	/* return value is never used? */
/*	return adapter->dw_sram_type; */
}

static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
{
	u8 tmp1, tmp2;

	dprintk("%s: mask = %x, addr = %x\n", __FUNCTION__, mask, addr);

	sram_set_size(adapter, mask);
	sram_init(adapter);

	tmp2 = 0xa5;
	tmp1 = 0x4f;

	sram_write(adapter, addr, &tmp2, 1);
	sram_write(adapter, addr + 4, &tmp1, 1);

	tmp2 = 0;

	mdelay(20);

	sram_read(adapter, addr, &tmp2, 1);
	sram_read(adapter, addr, &tmp2, 1);

	dprintk("%s: wrote 0xa5, read 0x%2x\n", __FUNCTION__, tmp2);

	if (tmp2 != 0xa5)
		return 0;

	tmp2 = 0x5a;
	tmp1 = 0xf4;

	sram_write(adapter, addr, &tmp2, 1);
	sram_write(adapter, addr + 4, &tmp1, 1);

	tmp2 = 0;

	mdelay(20);

	sram_read(adapter, addr, &tmp2, 1);
	sram_read(adapter, addr, &tmp2, 1);

	dprintk("%s: wrote 0x5a, read 0x%2x\n", __FUNCTION__, tmp2);

	if (tmp2 != 0x5a)
		return 0;

	return 1;
}

static u32 sram_length(struct adapter *adapter)
{
	if (adapter->dw_sram_type == 0x10000)
		return 32768;	//  32K
	if (adapter->dw_sram_type == 0x00000)
		return 65536;	//  64K
	if (adapter->dw_sram_type == 0x20000)
		return 131072;	// 128K

	return 32768;		// 32K
}

/* FlexcopII can work with 32K, 64K or 128K of external SRAM memory.
    - for 128K there are 4x32K chips at bank 0,1,2,3.
    - for  64K there are 2x32K chips at bank 1,2.
    - for  32K there is one 32K chip at bank 0.

   FlexCop works only with one bank at a time. The bank is selected
   by bits 28-29 of the 0x700 register.

   bank 0 covers addresses 0x00000-0x07fff
   bank 1 covers addresses 0x08000-0x0ffff
   bank 2 covers addresses 0x10000-0x17fff
   bank 3 covers addresses 0x18000-0x1ffff
*/

static int flexcop_sram_detect(struct flexcop_device *fc)
{
	flexcop_ibi_value r208,r71c_0,vr71c_1;

	r208 = fc->read_ibi_reg(fc, ctrl_208);
	fc->write_ibi_reg(fc, ctrl_208, ibi_zero);

	r71c_0 = fc->read_ibi_reg(fc, wan_ctrl_reg_71c);

	write_reg_dw(adapter, 0x71c, 1);

	tmp3 = read_reg_dw(adapter, 0x71c);

	dprintk("%s: tmp3 = %x\n", __FUNCTION__, tmp3);

	write_reg_dw(adapter, 0x71c, tmp2);

	// check for internal SRAM ???
	tmp3--;
	if (tmp3 != 0) {
		sram_set_size(adapter, 0x10000);
		sram_init(adapter);
		write_reg_dw(adapter, 0x208, tmp);

		dprintk("%s: sram size = 32K\n", __FUNCTION__);

		return 32;
	}

	if (sram_test_location(adapter, 0x20000, 0x18000) != 0) {
		sram_set_size(adapter, 0x20000);
		sram_init(adapter);
		write_reg_dw(adapter, 0x208, tmp);

		dprintk("%s: sram size = 128K\n", __FUNCTION__);

		return 128;
	}

	if (sram_test_location(adapter, 0x00000, 0x10000) != 0) {
		sram_set_size(adapter, 0x00000);
		sram_init(adapter);
		write_reg_dw(adapter, 0x208, tmp);

		dprintk("%s: sram size = 64K\n", __FUNCTION__);

		return 64;
	}

	if (sram_test_location(adapter, 0x10000, 0x00000) != 0) {
		sram_set_size(adapter, 0x10000);
		sram_init(adapter);
		write_reg_dw(adapter, 0x208, tmp);

		dprintk("%s: sram size = 32K\n", __FUNCTION__);

		return 32;
	}

	sram_set_size(adapter, 0x10000);
	sram_init(adapter);
	write_reg_dw(adapter, 0x208, tmp);

	dprintk("%s: SRAM detection failed. Set to 32K \n", __FUNCTION__);

	return 0;
}

static void sll_detect_sram_size(struct adapter *adapter)
{
	sram_detect_for_flex2(adapter);
}

#endif