1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
4 * flexcop-sram.c - functions for controlling the SRAM
5 * see flexcop.c for copyright information
6 */
7 #include "flexcop.h"
8
flexcop_sram_set_chip(struct flexcop_device * fc,flexcop_sram_type_t type)9 static void flexcop_sram_set_chip(struct flexcop_device *fc,
10 flexcop_sram_type_t type)
11 {
12 flexcop_set_ibi_value(wan_ctrl_reg_71c, sram_chip, type);
13 }
14
flexcop_sram_init(struct flexcop_device * fc)15 int flexcop_sram_init(struct flexcop_device *fc)
16 {
17 switch (fc->rev) {
18 case FLEXCOP_II:
19 case FLEXCOP_IIB:
20 flexcop_sram_set_chip(fc, FC_SRAM_1_32KB);
21 break;
22 case FLEXCOP_III:
23 flexcop_sram_set_chip(fc, FC_SRAM_1_48KB);
24 break;
25 default:
26 return -EINVAL;
27 }
28 return 0;
29 }
30
flexcop_sram_set_dest(struct flexcop_device * fc,flexcop_sram_dest_t dest,flexcop_sram_dest_target_t target)31 int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest,
32 flexcop_sram_dest_target_t target)
33 {
34 flexcop_ibi_value v;
35 v = fc->read_ibi_reg(fc, sram_dest_reg_714);
36
37 if (fc->rev != FLEXCOP_III && target == FC_SRAM_DEST_TARGET_FC3_CA) {
38 err("SRAM destination target to available on FlexCopII(b)\n");
39 return -EINVAL;
40 }
41 deb_sram("sram dest: %x target: %x\n", dest, target);
42
43 if (dest & FC_SRAM_DEST_NET)
44 v.sram_dest_reg_714.NET_Dest = target;
45 if (dest & FC_SRAM_DEST_CAI)
46 v.sram_dest_reg_714.CAI_Dest = target;
47 if (dest & FC_SRAM_DEST_CAO)
48 v.sram_dest_reg_714.CAO_Dest = target;
49 if (dest & FC_SRAM_DEST_MEDIA)
50 v.sram_dest_reg_714.MEDIA_Dest = target;
51
52 fc->write_ibi_reg(fc,sram_dest_reg_714,v);
53 udelay(1000); /* TODO delay really necessary */
54
55 return 0;
56 }
57 EXPORT_SYMBOL(flexcop_sram_set_dest);
58
flexcop_wan_set_speed(struct flexcop_device * fc,flexcop_wan_speed_t s)59 void flexcop_wan_set_speed(struct flexcop_device *fc, flexcop_wan_speed_t s)
60 {
61 flexcop_set_ibi_value(wan_ctrl_reg_71c,wan_speed_sig,s);
62 }
63 EXPORT_SYMBOL(flexcop_wan_set_speed);
64
flexcop_sram_ctrl(struct flexcop_device * fc,int usb_wan,int sramdma,int maximumfill)65 void flexcop_sram_ctrl(struct flexcop_device *fc, int usb_wan, int sramdma, int maximumfill)
66 {
67 flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
68 v.sram_dest_reg_714.ctrl_usb_wan = usb_wan;
69 v.sram_dest_reg_714.ctrl_sramdma = sramdma;
70 v.sram_dest_reg_714.ctrl_maximumfill = maximumfill;
71 fc->write_ibi_reg(fc,sram_dest_reg_714,v);
72 }
73 EXPORT_SYMBOL(flexcop_sram_ctrl);
74
75 #if 0
76 static void flexcop_sram_write(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
77 {
78 int i, retries;
79 u32 command;
80
81 for (i = 0; i < len; i++) {
82 command = bank | addr | 0x04000000 | (*buf << 0x10);
83
84 retries = 2;
85
86 while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
87 mdelay(1);
88 retries--;
89 }
90
91 if (retries == 0)
92 printk("%s: SRAM timeout\n", __func__);
93
94 write_reg_dw(adapter, 0x700, command);
95
96 buf++;
97 addr++;
98 }
99 }
100
101 static void flex_sram_read(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
102 {
103 int i, retries;
104 u32 command, value;
105
106 for (i = 0; i < len; i++) {
107 command = bank | addr | 0x04008000;
108
109 retries = 10000;
110
111 while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
112 mdelay(1);
113 retries--;
114 }
115
116 if (retries == 0)
117 printk("%s: SRAM timeout\n", __func__);
118
119 write_reg_dw(adapter, 0x700, command);
120
121 retries = 10000;
122
123 while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
124 mdelay(1);
125 retries--;
126 }
127
128 if (retries == 0)
129 printk("%s: SRAM timeout\n", __func__);
130
131 value = read_reg_dw(adapter, 0x700) >> 0x10;
132
133 *buf = (value & 0xff);
134
135 addr++;
136 buf++;
137 }
138 }
139
140 static void sram_write_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
141 {
142 u32 bank;
143
144 bank = 0;
145
146 if (adapter->dw_sram_type == 0x20000) {
147 bank = (addr & 0x18000) << 0x0d;
148 }
149
150 if (adapter->dw_sram_type == 0x00000) {
151 if ((addr >> 0x0f) == 0)
152 bank = 0x20000000;
153 else
154 bank = 0x10000000;
155 }
156 flex_sram_write(adapter, bank, addr & 0x7fff, buf, len);
157 }
158
159 static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
160 {
161 u32 bank;
162 bank = 0;
163
164 if (adapter->dw_sram_type == 0x20000) {
165 bank = (addr & 0x18000) << 0x0d;
166 }
167
168 if (adapter->dw_sram_type == 0x00000) {
169 if ((addr >> 0x0f) == 0)
170 bank = 0x20000000;
171 else
172 bank = 0x10000000;
173 }
174 flex_sram_read(adapter, bank, addr & 0x7fff, buf, len);
175 }
176
177 static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
178 {
179 u32 length;
180 while (len != 0) {
181 length = len;
182 /* check if the address range belongs to the same
183 * 32K memory chip. If not, the data is read
184 * from one chip at a time */
185 if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
186 length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
187 }
188
189 sram_read_chunk(adapter, addr, buf, length);
190 addr = addr + length;
191 buf = buf + length;
192 len = len - length;
193 }
194 }
195
196 static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
197 {
198 u32 length;
199 while (len != 0) {
200 length = len;
201
202 /* check if the address range belongs to the same
203 * 32K memory chip. If not, the data is
204 * written to one chip at a time */
205 if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
206 length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
207 }
208
209 sram_write_chunk(adapter, addr, buf, length);
210 addr = addr + length;
211 buf = buf + length;
212 len = len - length;
213 }
214 }
215
216 static void sram_set_size(struct adapter *adapter, u32 mask)
217 {
218 write_reg_dw(adapter, 0x71c,
219 (mask | (~0x30000 & read_reg_dw(adapter, 0x71c))));
220 }
221
222 static void sram_init(struct adapter *adapter)
223 {
224 u32 tmp;
225 tmp = read_reg_dw(adapter, 0x71c);
226 write_reg_dw(adapter, 0x71c, 1);
227
228 if (read_reg_dw(adapter, 0x71c) != 0) {
229 write_reg_dw(adapter, 0x71c, tmp);
230 adapter->dw_sram_type = tmp & 0x30000;
231 ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type);
232 } else {
233 adapter->dw_sram_type = 0x10000;
234 ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type);
235 }
236 }
237
238 static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
239 {
240 u8 tmp1, tmp2;
241 dprintk("%s: mask = %x, addr = %x\n", __func__, mask, addr);
242
243 sram_set_size(adapter, mask);
244 sram_init(adapter);
245
246 tmp2 = 0xa5;
247 tmp1 = 0x4f;
248
249 sram_write(adapter, addr, &tmp2, 1);
250 sram_write(adapter, addr + 4, &tmp1, 1);
251
252 tmp2 = 0;
253 mdelay(20);
254
255 sram_read(adapter, addr, &tmp2, 1);
256 sram_read(adapter, addr, &tmp2, 1);
257
258 dprintk("%s: wrote 0xa5, read 0x%2x\n", __func__, tmp2);
259
260 if (tmp2 != 0xa5)
261 return 0;
262
263 tmp2 = 0x5a;
264 tmp1 = 0xf4;
265
266 sram_write(adapter, addr, &tmp2, 1);
267 sram_write(adapter, addr + 4, &tmp1, 1);
268
269 tmp2 = 0;
270 mdelay(20);
271
272 sram_read(adapter, addr, &tmp2, 1);
273 sram_read(adapter, addr, &tmp2, 1);
274
275 dprintk("%s: wrote 0x5a, read 0x%2x\n", __func__, tmp2);
276
277 if (tmp2 != 0x5a)
278 return 0;
279 return 1;
280 }
281
282 static u32 sram_length(struct adapter *adapter)
283 {
284 if (adapter->dw_sram_type == 0x10000)
285 return 32768; /* 32K */
286 if (adapter->dw_sram_type == 0x00000)
287 return 65536; /* 64K */
288 if (adapter->dw_sram_type == 0x20000)
289 return 131072; /* 128K */
290 return 32768; /* 32K */
291 }
292
293 /* FlexcopII can work with 32K, 64K or 128K of external SRAM memory.
294 - for 128K there are 4x32K chips at bank 0,1,2,3.
295 - for 64K there are 2x32K chips at bank 1,2.
296 - for 32K there is one 32K chip at bank 0.
297
298 FlexCop works only with one bank at a time. The bank is selected
299 by bits 28-29 of the 0x700 register.
300
301 bank 0 covers addresses 0x00000-0x07fff
302 bank 1 covers addresses 0x08000-0x0ffff
303 bank 2 covers addresses 0x10000-0x17fff
304 bank 3 covers addresses 0x18000-0x1ffff */
305
306 static int flexcop_sram_detect(struct flexcop_device *fc)
307 {
308 flexcop_ibi_value r208, r71c_0, vr71c_1;
309 r208 = fc->read_ibi_reg(fc, ctrl_208);
310 fc->write_ibi_reg(fc, ctrl_208, ibi_zero);
311
312 r71c_0 = fc->read_ibi_reg(fc, wan_ctrl_reg_71c);
313 write_reg_dw(adapter, 0x71c, 1);
314 tmp3 = read_reg_dw(adapter, 0x71c);
315 dprintk("%s: tmp3 = %x\n", __func__, tmp3);
316 write_reg_dw(adapter, 0x71c, tmp2);
317
318 // check for internal SRAM ???
319 tmp3--;
320 if (tmp3 != 0) {
321 sram_set_size(adapter, 0x10000);
322 sram_init(adapter);
323 write_reg_dw(adapter, 0x208, tmp);
324 dprintk("%s: sram size = 32K\n", __func__);
325 return 32;
326 }
327
328 if (sram_test_location(adapter, 0x20000, 0x18000) != 0) {
329 sram_set_size(adapter, 0x20000);
330 sram_init(adapter);
331 write_reg_dw(adapter, 0x208, tmp);
332 dprintk("%s: sram size = 128K\n", __func__);
333 return 128;
334 }
335
336 if (sram_test_location(adapter, 0x00000, 0x10000) != 0) {
337 sram_set_size(adapter, 0x00000);
338 sram_init(adapter);
339 write_reg_dw(adapter, 0x208, tmp);
340 dprintk("%s: sram size = 64K\n", __func__);
341 return 64;
342 }
343
344 if (sram_test_location(adapter, 0x10000, 0x00000) != 0) {
345 sram_set_size(adapter, 0x10000);
346 sram_init(adapter);
347 write_reg_dw(adapter, 0x208, tmp);
348 dprintk("%s: sram size = 32K\n", __func__);
349 return 32;
350 }
351
352 sram_set_size(adapter, 0x10000);
353 sram_init(adapter);
354 write_reg_dw(adapter, 0x208, tmp);
355 dprintk("%s: SRAM detection failed. Set to 32K \n", __func__);
356 return 0;
357 }
358
359 static void sll_detect_sram_size(struct adapter *adapter)
360 {
361 sram_detect_for_flex2(adapter);
362 }
363
364 #endif
365