1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Driver for the Conexant CX25821 PCIe bridge
4 *
5 * Copyright (C) 2009 Conexant Systems Inc.
6 * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
7 * Based on Steven Toth <stoth@linuxtv.org> cx23885 driver
8 */
9
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12 #include <linux/i2c.h>
13 #include <linux/slab.h>
14 #include "cx25821.h"
15 #include "cx25821-sram.h"
16 #include "cx25821-video.h"
17
18 MODULE_DESCRIPTION("Driver for Athena cards");
19 MODULE_AUTHOR("Shu Lin - Hiep Huynh");
20 MODULE_LICENSE("GPL");
21
22 static unsigned int debug;
23 module_param(debug, int, 0644);
24 MODULE_PARM_DESC(debug, "enable debug messages");
25
26 static unsigned int card[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };
27 module_param_array(card, int, NULL, 0444);
28 MODULE_PARM_DESC(card, "card type");
29
30 const struct sram_channel cx25821_sram_channels[] = {
31 [SRAM_CH00] = {
32 .i = SRAM_CH00,
33 .name = "VID A",
34 .cmds_start = VID_A_DOWN_CMDS,
35 .ctrl_start = VID_A_IQ,
36 .cdt = VID_A_CDT,
37 .fifo_start = VID_A_DOWN_CLUSTER_1,
38 .fifo_size = (VID_CLUSTER_SIZE << 2),
39 .ptr1_reg = DMA1_PTR1,
40 .ptr2_reg = DMA1_PTR2,
41 .cnt1_reg = DMA1_CNT1,
42 .cnt2_reg = DMA1_CNT2,
43 .int_msk = VID_A_INT_MSK,
44 .int_stat = VID_A_INT_STAT,
45 .int_mstat = VID_A_INT_MSTAT,
46 .dma_ctl = VID_DST_A_DMA_CTL,
47 .gpcnt_ctl = VID_DST_A_GPCNT_CTL,
48 .gpcnt = VID_DST_A_GPCNT,
49 .vip_ctl = VID_DST_A_VIP_CTL,
50 .pix_frmt = VID_DST_A_PIX_FRMT,
51 },
52
53 [SRAM_CH01] = {
54 .i = SRAM_CH01,
55 .name = "VID B",
56 .cmds_start = VID_B_DOWN_CMDS,
57 .ctrl_start = VID_B_IQ,
58 .cdt = VID_B_CDT,
59 .fifo_start = VID_B_DOWN_CLUSTER_1,
60 .fifo_size = (VID_CLUSTER_SIZE << 2),
61 .ptr1_reg = DMA2_PTR1,
62 .ptr2_reg = DMA2_PTR2,
63 .cnt1_reg = DMA2_CNT1,
64 .cnt2_reg = DMA2_CNT2,
65 .int_msk = VID_B_INT_MSK,
66 .int_stat = VID_B_INT_STAT,
67 .int_mstat = VID_B_INT_MSTAT,
68 .dma_ctl = VID_DST_B_DMA_CTL,
69 .gpcnt_ctl = VID_DST_B_GPCNT_CTL,
70 .gpcnt = VID_DST_B_GPCNT,
71 .vip_ctl = VID_DST_B_VIP_CTL,
72 .pix_frmt = VID_DST_B_PIX_FRMT,
73 },
74
75 [SRAM_CH02] = {
76 .i = SRAM_CH02,
77 .name = "VID C",
78 .cmds_start = VID_C_DOWN_CMDS,
79 .ctrl_start = VID_C_IQ,
80 .cdt = VID_C_CDT,
81 .fifo_start = VID_C_DOWN_CLUSTER_1,
82 .fifo_size = (VID_CLUSTER_SIZE << 2),
83 .ptr1_reg = DMA3_PTR1,
84 .ptr2_reg = DMA3_PTR2,
85 .cnt1_reg = DMA3_CNT1,
86 .cnt2_reg = DMA3_CNT2,
87 .int_msk = VID_C_INT_MSK,
88 .int_stat = VID_C_INT_STAT,
89 .int_mstat = VID_C_INT_MSTAT,
90 .dma_ctl = VID_DST_C_DMA_CTL,
91 .gpcnt_ctl = VID_DST_C_GPCNT_CTL,
92 .gpcnt = VID_DST_C_GPCNT,
93 .vip_ctl = VID_DST_C_VIP_CTL,
94 .pix_frmt = VID_DST_C_PIX_FRMT,
95 },
96
97 [SRAM_CH03] = {
98 .i = SRAM_CH03,
99 .name = "VID D",
100 .cmds_start = VID_D_DOWN_CMDS,
101 .ctrl_start = VID_D_IQ,
102 .cdt = VID_D_CDT,
103 .fifo_start = VID_D_DOWN_CLUSTER_1,
104 .fifo_size = (VID_CLUSTER_SIZE << 2),
105 .ptr1_reg = DMA4_PTR1,
106 .ptr2_reg = DMA4_PTR2,
107 .cnt1_reg = DMA4_CNT1,
108 .cnt2_reg = DMA4_CNT2,
109 .int_msk = VID_D_INT_MSK,
110 .int_stat = VID_D_INT_STAT,
111 .int_mstat = VID_D_INT_MSTAT,
112 .dma_ctl = VID_DST_D_DMA_CTL,
113 .gpcnt_ctl = VID_DST_D_GPCNT_CTL,
114 .gpcnt = VID_DST_D_GPCNT,
115 .vip_ctl = VID_DST_D_VIP_CTL,
116 .pix_frmt = VID_DST_D_PIX_FRMT,
117 },
118
119 [SRAM_CH04] = {
120 .i = SRAM_CH04,
121 .name = "VID E",
122 .cmds_start = VID_E_DOWN_CMDS,
123 .ctrl_start = VID_E_IQ,
124 .cdt = VID_E_CDT,
125 .fifo_start = VID_E_DOWN_CLUSTER_1,
126 .fifo_size = (VID_CLUSTER_SIZE << 2),
127 .ptr1_reg = DMA5_PTR1,
128 .ptr2_reg = DMA5_PTR2,
129 .cnt1_reg = DMA5_CNT1,
130 .cnt2_reg = DMA5_CNT2,
131 .int_msk = VID_E_INT_MSK,
132 .int_stat = VID_E_INT_STAT,
133 .int_mstat = VID_E_INT_MSTAT,
134 .dma_ctl = VID_DST_E_DMA_CTL,
135 .gpcnt_ctl = VID_DST_E_GPCNT_CTL,
136 .gpcnt = VID_DST_E_GPCNT,
137 .vip_ctl = VID_DST_E_VIP_CTL,
138 .pix_frmt = VID_DST_E_PIX_FRMT,
139 },
140
141 [SRAM_CH05] = {
142 .i = SRAM_CH05,
143 .name = "VID F",
144 .cmds_start = VID_F_DOWN_CMDS,
145 .ctrl_start = VID_F_IQ,
146 .cdt = VID_F_CDT,
147 .fifo_start = VID_F_DOWN_CLUSTER_1,
148 .fifo_size = (VID_CLUSTER_SIZE << 2),
149 .ptr1_reg = DMA6_PTR1,
150 .ptr2_reg = DMA6_PTR2,
151 .cnt1_reg = DMA6_CNT1,
152 .cnt2_reg = DMA6_CNT2,
153 .int_msk = VID_F_INT_MSK,
154 .int_stat = VID_F_INT_STAT,
155 .int_mstat = VID_F_INT_MSTAT,
156 .dma_ctl = VID_DST_F_DMA_CTL,
157 .gpcnt_ctl = VID_DST_F_GPCNT_CTL,
158 .gpcnt = VID_DST_F_GPCNT,
159 .vip_ctl = VID_DST_F_VIP_CTL,
160 .pix_frmt = VID_DST_F_PIX_FRMT,
161 },
162
163 [SRAM_CH06] = {
164 .i = SRAM_CH06,
165 .name = "VID G",
166 .cmds_start = VID_G_DOWN_CMDS,
167 .ctrl_start = VID_G_IQ,
168 .cdt = VID_G_CDT,
169 .fifo_start = VID_G_DOWN_CLUSTER_1,
170 .fifo_size = (VID_CLUSTER_SIZE << 2),
171 .ptr1_reg = DMA7_PTR1,
172 .ptr2_reg = DMA7_PTR2,
173 .cnt1_reg = DMA7_CNT1,
174 .cnt2_reg = DMA7_CNT2,
175 .int_msk = VID_G_INT_MSK,
176 .int_stat = VID_G_INT_STAT,
177 .int_mstat = VID_G_INT_MSTAT,
178 .dma_ctl = VID_DST_G_DMA_CTL,
179 .gpcnt_ctl = VID_DST_G_GPCNT_CTL,
180 .gpcnt = VID_DST_G_GPCNT,
181 .vip_ctl = VID_DST_G_VIP_CTL,
182 .pix_frmt = VID_DST_G_PIX_FRMT,
183 },
184
185 [SRAM_CH07] = {
186 .i = SRAM_CH07,
187 .name = "VID H",
188 .cmds_start = VID_H_DOWN_CMDS,
189 .ctrl_start = VID_H_IQ,
190 .cdt = VID_H_CDT,
191 .fifo_start = VID_H_DOWN_CLUSTER_1,
192 .fifo_size = (VID_CLUSTER_SIZE << 2),
193 .ptr1_reg = DMA8_PTR1,
194 .ptr2_reg = DMA8_PTR2,
195 .cnt1_reg = DMA8_CNT1,
196 .cnt2_reg = DMA8_CNT2,
197 .int_msk = VID_H_INT_MSK,
198 .int_stat = VID_H_INT_STAT,
199 .int_mstat = VID_H_INT_MSTAT,
200 .dma_ctl = VID_DST_H_DMA_CTL,
201 .gpcnt_ctl = VID_DST_H_GPCNT_CTL,
202 .gpcnt = VID_DST_H_GPCNT,
203 .vip_ctl = VID_DST_H_VIP_CTL,
204 .pix_frmt = VID_DST_H_PIX_FRMT,
205 },
206
207 [SRAM_CH08] = {
208 .name = "audio from",
209 .cmds_start = AUD_A_DOWN_CMDS,
210 .ctrl_start = AUD_A_IQ,
211 .cdt = AUD_A_CDT,
212 .fifo_start = AUD_A_DOWN_CLUSTER_1,
213 .fifo_size = AUDIO_CLUSTER_SIZE * 3,
214 .ptr1_reg = DMA17_PTR1,
215 .ptr2_reg = DMA17_PTR2,
216 .cnt1_reg = DMA17_CNT1,
217 .cnt2_reg = DMA17_CNT2,
218 },
219
220 [SRAM_CH09] = {
221 .i = SRAM_CH09,
222 .name = "VID Upstream I",
223 .cmds_start = VID_I_UP_CMDS,
224 .ctrl_start = VID_I_IQ,
225 .cdt = VID_I_CDT,
226 .fifo_start = VID_I_UP_CLUSTER_1,
227 .fifo_size = (VID_CLUSTER_SIZE << 2),
228 .ptr1_reg = DMA15_PTR1,
229 .ptr2_reg = DMA15_PTR2,
230 .cnt1_reg = DMA15_CNT1,
231 .cnt2_reg = DMA15_CNT2,
232 .int_msk = VID_I_INT_MSK,
233 .int_stat = VID_I_INT_STAT,
234 .int_mstat = VID_I_INT_MSTAT,
235 .dma_ctl = VID_SRC_I_DMA_CTL,
236 .gpcnt_ctl = VID_SRC_I_GPCNT_CTL,
237 .gpcnt = VID_SRC_I_GPCNT,
238
239 .vid_fmt_ctl = VID_SRC_I_FMT_CTL,
240 .vid_active_ctl1 = VID_SRC_I_ACTIVE_CTL1,
241 .vid_active_ctl2 = VID_SRC_I_ACTIVE_CTL2,
242 .vid_cdt_size = VID_SRC_I_CDT_SZ,
243 .irq_bit = 8,
244 },
245
246 [SRAM_CH10] = {
247 .i = SRAM_CH10,
248 .name = "VID Upstream J",
249 .cmds_start = VID_J_UP_CMDS,
250 .ctrl_start = VID_J_IQ,
251 .cdt = VID_J_CDT,
252 .fifo_start = VID_J_UP_CLUSTER_1,
253 .fifo_size = (VID_CLUSTER_SIZE << 2),
254 .ptr1_reg = DMA16_PTR1,
255 .ptr2_reg = DMA16_PTR2,
256 .cnt1_reg = DMA16_CNT1,
257 .cnt2_reg = DMA16_CNT2,
258 .int_msk = VID_J_INT_MSK,
259 .int_stat = VID_J_INT_STAT,
260 .int_mstat = VID_J_INT_MSTAT,
261 .dma_ctl = VID_SRC_J_DMA_CTL,
262 .gpcnt_ctl = VID_SRC_J_GPCNT_CTL,
263 .gpcnt = VID_SRC_J_GPCNT,
264
265 .vid_fmt_ctl = VID_SRC_J_FMT_CTL,
266 .vid_active_ctl1 = VID_SRC_J_ACTIVE_CTL1,
267 .vid_active_ctl2 = VID_SRC_J_ACTIVE_CTL2,
268 .vid_cdt_size = VID_SRC_J_CDT_SZ,
269 .irq_bit = 9,
270 },
271
272 [SRAM_CH11] = {
273 .i = SRAM_CH11,
274 .name = "Audio Upstream Channel B",
275 .cmds_start = AUD_B_UP_CMDS,
276 .ctrl_start = AUD_B_IQ,
277 .cdt = AUD_B_CDT,
278 .fifo_start = AUD_B_UP_CLUSTER_1,
279 .fifo_size = (AUDIO_CLUSTER_SIZE * 3),
280 .ptr1_reg = DMA22_PTR1,
281 .ptr2_reg = DMA22_PTR2,
282 .cnt1_reg = DMA22_CNT1,
283 .cnt2_reg = DMA22_CNT2,
284 .int_msk = AUD_B_INT_MSK,
285 .int_stat = AUD_B_INT_STAT,
286 .int_mstat = AUD_B_INT_MSTAT,
287 .dma_ctl = AUD_INT_DMA_CTL,
288 .gpcnt_ctl = AUD_B_GPCNT_CTL,
289 .gpcnt = AUD_B_GPCNT,
290 .aud_length = AUD_B_LNGTH,
291 .aud_cfg = AUD_B_CFG,
292 .fld_aud_fifo_en = FLD_AUD_SRC_B_FIFO_EN,
293 .fld_aud_risc_en = FLD_AUD_SRC_B_RISC_EN,
294 .irq_bit = 11,
295 },
296 };
297 EXPORT_SYMBOL(cx25821_sram_channels);
298
cx25821_risc_decode(u32 risc)299 static int cx25821_risc_decode(u32 risc)
300 {
301 static const char * const instr[16] = {
302 [RISC_SYNC >> 28] = "sync",
303 [RISC_WRITE >> 28] = "write",
304 [RISC_WRITEC >> 28] = "writec",
305 [RISC_READ >> 28] = "read",
306 [RISC_READC >> 28] = "readc",
307 [RISC_JUMP >> 28] = "jump",
308 [RISC_SKIP >> 28] = "skip",
309 [RISC_WRITERM >> 28] = "writerm",
310 [RISC_WRITECM >> 28] = "writecm",
311 [RISC_WRITECR >> 28] = "writecr",
312 };
313 static const int incr[16] = {
314 [RISC_WRITE >> 28] = 3,
315 [RISC_JUMP >> 28] = 3,
316 [RISC_SKIP >> 28] = 1,
317 [RISC_SYNC >> 28] = 1,
318 [RISC_WRITERM >> 28] = 3,
319 [RISC_WRITECM >> 28] = 3,
320 [RISC_WRITECR >> 28] = 4,
321 };
322 static const char * const bits[] = {
323 "12", "13", "14", "resync",
324 "cnt0", "cnt1", "18", "19",
325 "20", "21", "22", "23",
326 "irq1", "irq2", "eol", "sol",
327 };
328 int i;
329
330 pr_cont("0x%08x [ %s",
331 risc, instr[risc >> 28] ? instr[risc >> 28] : "INVALID");
332 for (i = ARRAY_SIZE(bits) - 1; i >= 0; i--) {
333 if (risc & (1 << (i + 12)))
334 pr_cont(" %s", bits[i]);
335 }
336 pr_cont(" count=%d ]\n", risc & 0xfff);
337 return incr[risc >> 28] ? incr[risc >> 28] : 1;
338 }
339
i2c_slave_did_ack(struct i2c_adapter * i2c_adap)340 static inline int i2c_slave_did_ack(struct i2c_adapter *i2c_adap)
341 {
342 struct cx25821_i2c *bus = i2c_adap->algo_data;
343 struct cx25821_dev *dev = bus->dev;
344 return cx_read(bus->reg_stat) & 0x01;
345 }
346
cx25821_registers_init(struct cx25821_dev * dev)347 static void cx25821_registers_init(struct cx25821_dev *dev)
348 {
349 u32 tmp;
350
351 /* enable RUN_RISC in Pecos */
352 cx_write(DEV_CNTRL2, 0x20);
353
354 /* Set the master PCI interrupt masks to enable video, audio, MBIF,
355 * and GPIO interrupts
356 * I2C interrupt masking is handled by the I2C objects themselves. */
357 cx_write(PCI_INT_MSK, 0x2001FFFF);
358
359 tmp = cx_read(RDR_TLCTL0);
360 tmp &= ~FLD_CFG_RCB_CK_EN; /* Clear the RCB_CK_EN bit */
361 cx_write(RDR_TLCTL0, tmp);
362
363 /* PLL-A setting for the Audio Master Clock */
364 cx_write(PLL_A_INT_FRAC, 0x9807A58B);
365
366 /* PLL_A_POST = 0x1C, PLL_A_OUT_TO_PIN = 0x1 */
367 cx_write(PLL_A_POST_STAT_BIST, 0x8000019C);
368
369 /* clear reset bit [31] */
370 tmp = cx_read(PLL_A_INT_FRAC);
371 cx_write(PLL_A_INT_FRAC, tmp & 0x7FFFFFFF);
372
373 /* PLL-B setting for Mobilygen Host Bus Interface */
374 cx_write(PLL_B_INT_FRAC, 0x9883A86F);
375
376 /* PLL_B_POST = 0xD, PLL_B_OUT_TO_PIN = 0x0 */
377 cx_write(PLL_B_POST_STAT_BIST, 0x8000018D);
378
379 /* clear reset bit [31] */
380 tmp = cx_read(PLL_B_INT_FRAC);
381 cx_write(PLL_B_INT_FRAC, tmp & 0x7FFFFFFF);
382
383 /* PLL-C setting for video upstream channel */
384 cx_write(PLL_C_INT_FRAC, 0x96A0EA3F);
385
386 /* PLL_C_POST = 0x3, PLL_C_OUT_TO_PIN = 0x0 */
387 cx_write(PLL_C_POST_STAT_BIST, 0x80000103);
388
389 /* clear reset bit [31] */
390 tmp = cx_read(PLL_C_INT_FRAC);
391 cx_write(PLL_C_INT_FRAC, tmp & 0x7FFFFFFF);
392
393 /* PLL-D setting for audio upstream channel */
394 cx_write(PLL_D_INT_FRAC, 0x98757F5B);
395
396 /* PLL_D_POST = 0x13, PLL_D_OUT_TO_PIN = 0x0 */
397 cx_write(PLL_D_POST_STAT_BIST, 0x80000113);
398
399 /* clear reset bit [31] */
400 tmp = cx_read(PLL_D_INT_FRAC);
401 cx_write(PLL_D_INT_FRAC, tmp & 0x7FFFFFFF);
402
403 /* This selects the PLL C clock source for the video upstream channel
404 * I and J */
405 tmp = cx_read(VID_CH_CLK_SEL);
406 cx_write(VID_CH_CLK_SEL, (tmp & 0x00FFFFFF) | 0x24000000);
407
408 /* 656/VIP SRC Upstream Channel I & J and 7 - Host Bus Interface for
409 * channel A-C
410 * select 656/VIP DST for downstream Channel A - C */
411 tmp = cx_read(VID_CH_MODE_SEL);
412 /* cx_write( VID_CH_MODE_SEL, tmp | 0x1B0001FF); */
413 cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
414
415 /* enables 656 port I and J as output */
416 tmp = cx_read(CLK_RST);
417 /* use external ALT_PLL_REF pin as its reference clock instead */
418 tmp |= FLD_USE_ALT_PLL_REF;
419 cx_write(CLK_RST, tmp & ~(FLD_VID_I_CLK_NOE | FLD_VID_J_CLK_NOE));
420
421 msleep(100);
422 }
423
cx25821_sram_channel_setup(struct cx25821_dev * dev,const struct sram_channel * ch,unsigned int bpl,u32 risc)424 int cx25821_sram_channel_setup(struct cx25821_dev *dev,
425 const struct sram_channel *ch,
426 unsigned int bpl, u32 risc)
427 {
428 unsigned int i, lines;
429 u32 cdt;
430
431 if (ch->cmds_start == 0) {
432 cx_write(ch->ptr1_reg, 0);
433 cx_write(ch->ptr2_reg, 0);
434 cx_write(ch->cnt2_reg, 0);
435 cx_write(ch->cnt1_reg, 0);
436 return 0;
437 }
438
439 bpl = (bpl + 7) & ~7; /* alignment */
440 cdt = ch->cdt;
441 lines = ch->fifo_size / bpl;
442
443 if (lines > 4)
444 lines = 4;
445
446 BUG_ON(lines < 2);
447
448 cx_write(8 + 0, RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
449 cx_write(8 + 4, 8);
450 cx_write(8 + 8, 0);
451
452 /* write CDT */
453 for (i = 0; i < lines; i++) {
454 cx_write(cdt + 16 * i, ch->fifo_start + bpl * i);
455 cx_write(cdt + 16 * i + 4, 0);
456 cx_write(cdt + 16 * i + 8, 0);
457 cx_write(cdt + 16 * i + 12, 0);
458 }
459
460 /* init the first cdt buffer */
461 for (i = 0; i < 128; i++)
462 cx_write(ch->fifo_start + 4 * i, i);
463
464 /* write CMDS */
465 if (ch->jumponly)
466 cx_write(ch->cmds_start + 0, 8);
467 else
468 cx_write(ch->cmds_start + 0, risc);
469
470 cx_write(ch->cmds_start + 4, 0); /* 64 bits 63-32 */
471 cx_write(ch->cmds_start + 8, cdt);
472 cx_write(ch->cmds_start + 12, (lines * 16) >> 3);
473 cx_write(ch->cmds_start + 16, ch->ctrl_start);
474
475 if (ch->jumponly)
476 cx_write(ch->cmds_start + 20, 0x80000000 | (64 >> 2));
477 else
478 cx_write(ch->cmds_start + 20, 64 >> 2);
479
480 for (i = 24; i < 80; i += 4)
481 cx_write(ch->cmds_start + i, 0);
482
483 /* fill registers */
484 cx_write(ch->ptr1_reg, ch->fifo_start);
485 cx_write(ch->ptr2_reg, cdt);
486 cx_write(ch->cnt2_reg, (lines * 16) >> 3);
487 cx_write(ch->cnt1_reg, (bpl >> 3) - 1);
488
489 return 0;
490 }
491
cx25821_sram_channel_setup_audio(struct cx25821_dev * dev,const struct sram_channel * ch,unsigned int bpl,u32 risc)492 int cx25821_sram_channel_setup_audio(struct cx25821_dev *dev,
493 const struct sram_channel *ch,
494 unsigned int bpl, u32 risc)
495 {
496 unsigned int i, lines;
497 u32 cdt;
498
499 if (ch->cmds_start == 0) {
500 cx_write(ch->ptr1_reg, 0);
501 cx_write(ch->ptr2_reg, 0);
502 cx_write(ch->cnt2_reg, 0);
503 cx_write(ch->cnt1_reg, 0);
504 return 0;
505 }
506
507 bpl = (bpl + 7) & ~7; /* alignment */
508 cdt = ch->cdt;
509 lines = ch->fifo_size / bpl;
510
511 if (lines > 3)
512 lines = 3; /* for AUDIO */
513
514 BUG_ON(lines < 2);
515
516 cx_write(8 + 0, RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
517 cx_write(8 + 4, 8);
518 cx_write(8 + 8, 0);
519
520 /* write CDT */
521 for (i = 0; i < lines; i++) {
522 cx_write(cdt + 16 * i, ch->fifo_start + bpl * i);
523 cx_write(cdt + 16 * i + 4, 0);
524 cx_write(cdt + 16 * i + 8, 0);
525 cx_write(cdt + 16 * i + 12, 0);
526 }
527
528 /* write CMDS */
529 if (ch->jumponly)
530 cx_write(ch->cmds_start + 0, 8);
531 else
532 cx_write(ch->cmds_start + 0, risc);
533
534 cx_write(ch->cmds_start + 4, 0); /* 64 bits 63-32 */
535 cx_write(ch->cmds_start + 8, cdt);
536 cx_write(ch->cmds_start + 12, (lines * 16) >> 3);
537 cx_write(ch->cmds_start + 16, ch->ctrl_start);
538
539 /* IQ size */
540 if (ch->jumponly)
541 cx_write(ch->cmds_start + 20, 0x80000000 | (64 >> 2));
542 else
543 cx_write(ch->cmds_start + 20, 64 >> 2);
544
545 /* zero out */
546 for (i = 24; i < 80; i += 4)
547 cx_write(ch->cmds_start + i, 0);
548
549 /* fill registers */
550 cx_write(ch->ptr1_reg, ch->fifo_start);
551 cx_write(ch->ptr2_reg, cdt);
552 cx_write(ch->cnt2_reg, (lines * 16) >> 3);
553 cx_write(ch->cnt1_reg, (bpl >> 3) - 1);
554
555 return 0;
556 }
557 EXPORT_SYMBOL(cx25821_sram_channel_setup_audio);
558
cx25821_sram_channel_dump(struct cx25821_dev * dev,const struct sram_channel * ch)559 void cx25821_sram_channel_dump(struct cx25821_dev *dev, const struct sram_channel *ch)
560 {
561 static char *name[] = {
562 "init risc lo",
563 "init risc hi",
564 "cdt base",
565 "cdt size",
566 "iq base",
567 "iq size",
568 "risc pc lo",
569 "risc pc hi",
570 "iq wr ptr",
571 "iq rd ptr",
572 "cdt current",
573 "pci target lo",
574 "pci target hi",
575 "line / byte",
576 };
577 u32 risc;
578 unsigned int i, j, n;
579
580 pr_warn("%s: %s - dma channel status dump\n", dev->name, ch->name);
581 for (i = 0; i < ARRAY_SIZE(name); i++)
582 pr_warn("cmds + 0x%2x: %-15s: 0x%08x\n",
583 i * 4, name[i], cx_read(ch->cmds_start + 4 * i));
584
585 j = i * 4;
586 for (i = 0; i < 4;) {
587 risc = cx_read(ch->cmds_start + 4 * (i + 14));
588 pr_warn("cmds + 0x%2x: risc%d: ", j + i * 4, i);
589 i += cx25821_risc_decode(risc);
590 }
591
592 for (i = 0; i < (64 >> 2); i += n) {
593 risc = cx_read(ch->ctrl_start + 4 * i);
594 /* No consideration for bits 63-32 */
595
596 pr_warn("ctrl + 0x%2x (0x%08x): iq %x: ",
597 i * 4, ch->ctrl_start + 4 * i, i);
598 n = cx25821_risc_decode(risc);
599 for (j = 1; j < n; j++) {
600 risc = cx_read(ch->ctrl_start + 4 * (i + j));
601 pr_warn("ctrl + 0x%2x : iq %x: 0x%08x [ arg #%d ]\n",
602 4 * (i + j), i + j, risc, j);
603 }
604 }
605
606 pr_warn(" : fifo: 0x%08x -> 0x%x\n",
607 ch->fifo_start, ch->fifo_start + ch->fifo_size);
608 pr_warn(" : ctrl: 0x%08x -> 0x%x\n",
609 ch->ctrl_start, ch->ctrl_start + 6 * 16);
610 pr_warn(" : ptr1_reg: 0x%08x\n",
611 cx_read(ch->ptr1_reg));
612 pr_warn(" : ptr2_reg: 0x%08x\n",
613 cx_read(ch->ptr2_reg));
614 pr_warn(" : cnt1_reg: 0x%08x\n",
615 cx_read(ch->cnt1_reg));
616 pr_warn(" : cnt2_reg: 0x%08x\n",
617 cx_read(ch->cnt2_reg));
618 }
619
cx25821_sram_channel_dump_audio(struct cx25821_dev * dev,const struct sram_channel * ch)620 void cx25821_sram_channel_dump_audio(struct cx25821_dev *dev,
621 const struct sram_channel *ch)
622 {
623 static const char * const name[] = {
624 "init risc lo",
625 "init risc hi",
626 "cdt base",
627 "cdt size",
628 "iq base",
629 "iq size",
630 "risc pc lo",
631 "risc pc hi",
632 "iq wr ptr",
633 "iq rd ptr",
634 "cdt current",
635 "pci target lo",
636 "pci target hi",
637 "line / byte",
638 };
639
640 u32 risc, value, tmp;
641 unsigned int i, j, n;
642
643 pr_info("\n%s: %s - dma Audio channel status dump\n",
644 dev->name, ch->name);
645
646 for (i = 0; i < ARRAY_SIZE(name); i++)
647 pr_info("%s: cmds + 0x%2x: %-15s: 0x%08x\n",
648 dev->name, i * 4, name[i],
649 cx_read(ch->cmds_start + 4 * i));
650
651 j = i * 4;
652 for (i = 0; i < 4;) {
653 risc = cx_read(ch->cmds_start + 4 * (i + 14));
654 pr_warn("cmds + 0x%2x: risc%d: ", j + i * 4, i);
655 i += cx25821_risc_decode(risc);
656 }
657
658 for (i = 0; i < (64 >> 2); i += n) {
659 risc = cx_read(ch->ctrl_start + 4 * i);
660 /* No consideration for bits 63-32 */
661
662 pr_warn("ctrl + 0x%2x (0x%08x): iq %x: ",
663 i * 4, ch->ctrl_start + 4 * i, i);
664 n = cx25821_risc_decode(risc);
665
666 for (j = 1; j < n; j++) {
667 risc = cx_read(ch->ctrl_start + 4 * (i + j));
668 pr_warn("ctrl + 0x%2x : iq %x: 0x%08x [ arg #%d ]\n",
669 4 * (i + j), i + j, risc, j);
670 }
671 }
672
673 pr_warn(" : fifo: 0x%08x -> 0x%x\n",
674 ch->fifo_start, ch->fifo_start + ch->fifo_size);
675 pr_warn(" : ctrl: 0x%08x -> 0x%x\n",
676 ch->ctrl_start, ch->ctrl_start + 6 * 16);
677 pr_warn(" : ptr1_reg: 0x%08x\n",
678 cx_read(ch->ptr1_reg));
679 pr_warn(" : ptr2_reg: 0x%08x\n",
680 cx_read(ch->ptr2_reg));
681 pr_warn(" : cnt1_reg: 0x%08x\n",
682 cx_read(ch->cnt1_reg));
683 pr_warn(" : cnt2_reg: 0x%08x\n",
684 cx_read(ch->cnt2_reg));
685
686 for (i = 0; i < 4; i++) {
687 risc = cx_read(ch->cmds_start + 56 + (i * 4));
688 pr_warn("instruction %d = 0x%x\n", i, risc);
689 }
690
691 /* read data from the first cdt buffer */
692 risc = cx_read(AUD_A_CDT);
693 pr_warn("\nread cdt loc=0x%x\n", risc);
694 for (i = 0; i < 8; i++) {
695 n = cx_read(risc + i * 4);
696 pr_cont("0x%x ", n);
697 }
698 pr_cont("\n\n");
699
700 value = cx_read(CLK_RST);
701 CX25821_INFO(" CLK_RST = 0x%x\n\n", value);
702
703 value = cx_read(PLL_A_POST_STAT_BIST);
704 CX25821_INFO(" PLL_A_POST_STAT_BIST = 0x%x\n\n", value);
705 value = cx_read(PLL_A_INT_FRAC);
706 CX25821_INFO(" PLL_A_INT_FRAC = 0x%x\n\n", value);
707
708 value = cx_read(PLL_B_POST_STAT_BIST);
709 CX25821_INFO(" PLL_B_POST_STAT_BIST = 0x%x\n\n", value);
710 value = cx_read(PLL_B_INT_FRAC);
711 CX25821_INFO(" PLL_B_INT_FRAC = 0x%x\n\n", value);
712
713 value = cx_read(PLL_C_POST_STAT_BIST);
714 CX25821_INFO(" PLL_C_POST_STAT_BIST = 0x%x\n\n", value);
715 value = cx_read(PLL_C_INT_FRAC);
716 CX25821_INFO(" PLL_C_INT_FRAC = 0x%x\n\n", value);
717
718 value = cx_read(PLL_D_POST_STAT_BIST);
719 CX25821_INFO(" PLL_D_POST_STAT_BIST = 0x%x\n\n", value);
720 value = cx_read(PLL_D_INT_FRAC);
721 CX25821_INFO(" PLL_D_INT_FRAC = 0x%x\n\n", value);
722
723 value = cx25821_i2c_read(&dev->i2c_bus[0], AFE_AB_DIAG_CTRL, &tmp);
724 CX25821_INFO(" AFE_AB_DIAG_CTRL (0x10900090) = 0x%x\n\n", value);
725 }
726 EXPORT_SYMBOL(cx25821_sram_channel_dump_audio);
727
cx25821_shutdown(struct cx25821_dev * dev)728 static void cx25821_shutdown(struct cx25821_dev *dev)
729 {
730 int i;
731
732 /* disable RISC controller */
733 cx_write(DEV_CNTRL2, 0);
734
735 /* Disable Video A/B activity */
736 for (i = 0; i < VID_CHANNEL_NUM; i++) {
737 cx_write(dev->channels[i].sram_channels->dma_ctl, 0);
738 cx_write(dev->channels[i].sram_channels->int_msk, 0);
739 }
740
741 for (i = VID_UPSTREAM_SRAM_CHANNEL_I;
742 i <= VID_UPSTREAM_SRAM_CHANNEL_J; i++) {
743 cx_write(dev->channels[i].sram_channels->dma_ctl, 0);
744 cx_write(dev->channels[i].sram_channels->int_msk, 0);
745 }
746
747 /* Disable Audio activity */
748 cx_write(AUD_INT_DMA_CTL, 0);
749
750 /* Disable Serial port */
751 cx_write(UART_CTL, 0);
752
753 /* Disable Interrupts */
754 cx_write(PCI_INT_MSK, 0);
755 cx_write(AUD_A_INT_MSK, 0);
756 }
757
cx25821_set_pixel_format(struct cx25821_dev * dev,int channel_select,u32 format)758 void cx25821_set_pixel_format(struct cx25821_dev *dev, int channel_select,
759 u32 format)
760 {
761 if (channel_select <= 7 && channel_select >= 0) {
762 cx_write(dev->channels[channel_select].sram_channels->pix_frmt,
763 format);
764 }
765 dev->channels[channel_select].pixel_formats = format;
766 }
767
cx25821_set_vip_mode(struct cx25821_dev * dev,const struct sram_channel * ch)768 static void cx25821_set_vip_mode(struct cx25821_dev *dev,
769 const struct sram_channel *ch)
770 {
771 cx_write(ch->pix_frmt, PIXEL_FRMT_422);
772 cx_write(ch->vip_ctl, PIXEL_ENGINE_VIP1);
773 }
774
cx25821_initialize(struct cx25821_dev * dev)775 static void cx25821_initialize(struct cx25821_dev *dev)
776 {
777 int i;
778
779 dprintk(1, "%s()\n", __func__);
780
781 cx25821_shutdown(dev);
782 cx_write(PCI_INT_STAT, 0xffffffff);
783
784 for (i = 0; i < VID_CHANNEL_NUM; i++)
785 cx_write(dev->channels[i].sram_channels->int_stat, 0xffffffff);
786
787 cx_write(AUD_A_INT_STAT, 0xffffffff);
788 cx_write(AUD_B_INT_STAT, 0xffffffff);
789 cx_write(AUD_C_INT_STAT, 0xffffffff);
790 cx_write(AUD_D_INT_STAT, 0xffffffff);
791 cx_write(AUD_E_INT_STAT, 0xffffffff);
792
793 cx_write(CLK_DELAY, cx_read(CLK_DELAY) & 0x80000000);
794 cx_write(PAD_CTRL, 0x12); /* for I2C */
795 cx25821_registers_init(dev); /* init Pecos registers */
796 msleep(100);
797
798 for (i = 0; i < VID_CHANNEL_NUM; i++) {
799 cx25821_set_vip_mode(dev, dev->channels[i].sram_channels);
800 cx25821_sram_channel_setup(dev, dev->channels[i].sram_channels,
801 1440, 0);
802 dev->channels[i].pixel_formats = PIXEL_FRMT_422;
803 dev->channels[i].use_cif_resolution = 0;
804 }
805
806 /* Probably only affect Downstream */
807 for (i = VID_UPSTREAM_SRAM_CHANNEL_I;
808 i <= VID_UPSTREAM_SRAM_CHANNEL_J; i++) {
809 dev->channels[i].pixel_formats = PIXEL_FRMT_422;
810 cx25821_set_vip_mode(dev, dev->channels[i].sram_channels);
811 }
812
813 cx25821_sram_channel_setup_audio(dev,
814 dev->channels[SRAM_CH08].sram_channels, 128, 0);
815
816 cx25821_gpio_init(dev);
817 }
818
cx25821_get_resources(struct cx25821_dev * dev)819 static int cx25821_get_resources(struct cx25821_dev *dev)
820 {
821 if (request_mem_region(pci_resource_start(dev->pci, 0),
822 pci_resource_len(dev->pci, 0), dev->name))
823 return 0;
824
825 pr_err("%s: can't get MMIO memory @ 0x%llx\n",
826 dev->name, (unsigned long long)pci_resource_start(dev->pci, 0));
827
828 return -EBUSY;
829 }
830
cx25821_dev_checkrevision(struct cx25821_dev * dev)831 static void cx25821_dev_checkrevision(struct cx25821_dev *dev)
832 {
833 dev->hwrevision = cx_read(RDR_CFG2) & 0xff;
834
835 pr_info("Hardware revision = 0x%02x\n", dev->hwrevision);
836 }
837
cx25821_iounmap(struct cx25821_dev * dev)838 static void cx25821_iounmap(struct cx25821_dev *dev)
839 {
840 if (dev == NULL)
841 return;
842
843 /* Releasing IO memory */
844 if (dev->lmmio != NULL) {
845 iounmap(dev->lmmio);
846 dev->lmmio = NULL;
847 }
848 }
849
cx25821_dev_setup(struct cx25821_dev * dev)850 static int cx25821_dev_setup(struct cx25821_dev *dev)
851 {
852 static unsigned int cx25821_devcount;
853 int i;
854
855 mutex_init(&dev->lock);
856
857 dev->nr = ++cx25821_devcount;
858 sprintf(dev->name, "cx25821[%d]", dev->nr);
859
860 if (dev->nr >= ARRAY_SIZE(card)) {
861 CX25821_INFO("dev->nr >= %zd", ARRAY_SIZE(card));
862 return -ENODEV;
863 }
864 if (dev->pci->device != 0x8210) {
865 pr_info("%s(): Exiting. Incorrect Hardware device = 0x%02x\n",
866 __func__, dev->pci->device);
867 return -ENODEV;
868 }
869 pr_info("Athena Hardware device = 0x%02x\n", dev->pci->device);
870
871 /* Apply a sensible clock frequency for the PCIe bridge */
872 dev->clk_freq = 28000000;
873 for (i = 0; i < MAX_VID_CHANNEL_NUM; i++) {
874 dev->channels[i].dev = dev;
875 dev->channels[i].id = i;
876 dev->channels[i].sram_channels = &cx25821_sram_channels[i];
877 }
878
879 /* board config */
880 dev->board = 1; /* card[dev->nr]; */
881 dev->_max_num_decoders = MAX_DECODERS;
882
883 dev->pci_bus = dev->pci->bus->number;
884 dev->pci_slot = PCI_SLOT(dev->pci->devfn);
885 dev->pci_irqmask = 0x001f00;
886
887 /* External Master 1 Bus */
888 dev->i2c_bus[0].nr = 0;
889 dev->i2c_bus[0].dev = dev;
890 dev->i2c_bus[0].reg_stat = I2C1_STAT;
891 dev->i2c_bus[0].reg_ctrl = I2C1_CTRL;
892 dev->i2c_bus[0].reg_addr = I2C1_ADDR;
893 dev->i2c_bus[0].reg_rdata = I2C1_RDATA;
894 dev->i2c_bus[0].reg_wdata = I2C1_WDATA;
895 dev->i2c_bus[0].i2c_period = (0x07 << 24); /* 1.95MHz */
896
897 if (cx25821_get_resources(dev) < 0) {
898 pr_err("%s: No more PCIe resources for subsystem: %04x:%04x\n",
899 dev->name, dev->pci->subsystem_vendor,
900 dev->pci->subsystem_device);
901
902 cx25821_devcount--;
903 return -EBUSY;
904 }
905
906 /* PCIe stuff */
907 dev->base_io_addr = pci_resource_start(dev->pci, 0);
908
909 if (!dev->base_io_addr) {
910 CX25821_ERR("No PCI Memory resources, exiting!\n");
911 return -ENODEV;
912 }
913
914 dev->lmmio = ioremap(dev->base_io_addr, pci_resource_len(dev->pci, 0));
915
916 if (!dev->lmmio) {
917 CX25821_ERR("ioremap failed, maybe increasing __VMALLOC_RESERVE in page.h\n");
918 cx25821_iounmap(dev);
919 return -ENOMEM;
920 }
921
922 dev->bmmio = (u8 __iomem *) dev->lmmio;
923
924 pr_info("%s: subsystem: %04x:%04x, board: %s [card=%d,%s]\n",
925 dev->name, dev->pci->subsystem_vendor,
926 dev->pci->subsystem_device, cx25821_boards[dev->board].name,
927 dev->board, card[dev->nr] == dev->board ?
928 "insmod option" : "autodetected");
929
930 /* init hardware */
931 cx25821_initialize(dev);
932
933 cx25821_i2c_register(&dev->i2c_bus[0]);
934 /* cx25821_i2c_register(&dev->i2c_bus[1]);
935 * cx25821_i2c_register(&dev->i2c_bus[2]); */
936
937 if (medusa_video_init(dev) < 0)
938 CX25821_ERR("%s(): Failed to initialize medusa!\n", __func__);
939
940 cx25821_video_register(dev);
941
942 cx25821_dev_checkrevision(dev);
943 return 0;
944 }
945
cx25821_dev_unregister(struct cx25821_dev * dev)946 void cx25821_dev_unregister(struct cx25821_dev *dev)
947 {
948 int i;
949
950 if (!dev->base_io_addr)
951 return;
952
953 release_mem_region(dev->base_io_addr, pci_resource_len(dev->pci, 0));
954
955 for (i = 0; i < MAX_VID_CAP_CHANNEL_NUM - 1; i++) {
956 if (i == SRAM_CH08) /* audio channel */
957 continue;
958 /*
959 * TODO: enable when video output is properly
960 * supported.
961 if (i == SRAM_CH09 || i == SRAM_CH10)
962 cx25821_free_mem_upstream(&dev->channels[i]);
963 */
964 cx25821_video_unregister(dev, i);
965 }
966
967 cx25821_i2c_unregister(&dev->i2c_bus[0]);
968 cx25821_iounmap(dev);
969 }
970 EXPORT_SYMBOL(cx25821_dev_unregister);
971
cx25821_riscmem_alloc(struct pci_dev * pci,struct cx25821_riscmem * risc,unsigned int size)972 int cx25821_riscmem_alloc(struct pci_dev *pci,
973 struct cx25821_riscmem *risc,
974 unsigned int size)
975 {
976 __le32 *cpu;
977 dma_addr_t dma = 0;
978
979 if (risc->cpu && risc->size < size) {
980 dma_free_coherent(&pci->dev, risc->size, risc->cpu, risc->dma);
981 risc->cpu = NULL;
982 }
983 if (NULL == risc->cpu) {
984 cpu = dma_alloc_coherent(&pci->dev, size, &dma, GFP_KERNEL);
985 if (NULL == cpu)
986 return -ENOMEM;
987 risc->cpu = cpu;
988 risc->dma = dma;
989 risc->size = size;
990 }
991 return 0;
992 }
993 EXPORT_SYMBOL(cx25821_riscmem_alloc);
994
cx25821_risc_field(__le32 * rp,struct scatterlist * sglist,unsigned int offset,u32 sync_line,unsigned int bpl,unsigned int padding,unsigned int lines,bool jump)995 static __le32 *cx25821_risc_field(__le32 * rp, struct scatterlist *sglist,
996 unsigned int offset, u32 sync_line,
997 unsigned int bpl, unsigned int padding,
998 unsigned int lines, bool jump)
999 {
1000 struct scatterlist *sg;
1001 unsigned int line, todo;
1002
1003 if (jump) {
1004 *(rp++) = cpu_to_le32(RISC_JUMP);
1005 *(rp++) = cpu_to_le32(0);
1006 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
1007 }
1008
1009 /* sync instruction */
1010 if (sync_line != NO_SYNC_LINE)
1011 *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
1012
1013 /* scan lines */
1014 sg = sglist;
1015 for (line = 0; line < lines; line++) {
1016 while (offset && offset >= sg_dma_len(sg)) {
1017 offset -= sg_dma_len(sg);
1018 sg = sg_next(sg);
1019 }
1020 if (bpl <= sg_dma_len(sg) - offset) {
1021 /* fits into current chunk */
1022 *(rp++) = cpu_to_le32(RISC_WRITE | RISC_SOL | RISC_EOL |
1023 bpl);
1024 *(rp++) = cpu_to_le32(sg_dma_address(sg) + offset);
1025 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
1026 offset += bpl;
1027 } else {
1028 /* scanline needs to be split */
1029 todo = bpl;
1030 *(rp++) = cpu_to_le32(RISC_WRITE | RISC_SOL |
1031 (sg_dma_len(sg) - offset));
1032 *(rp++) = cpu_to_le32(sg_dma_address(sg) + offset);
1033 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
1034 todo -= (sg_dma_len(sg) - offset);
1035 offset = 0;
1036 sg = sg_next(sg);
1037 while (todo > sg_dma_len(sg)) {
1038 *(rp++) = cpu_to_le32(RISC_WRITE |
1039 sg_dma_len(sg));
1040 *(rp++) = cpu_to_le32(sg_dma_address(sg));
1041 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
1042 todo -= sg_dma_len(sg);
1043 sg = sg_next(sg);
1044 }
1045 *(rp++) = cpu_to_le32(RISC_WRITE | RISC_EOL | todo);
1046 *(rp++) = cpu_to_le32(sg_dma_address(sg));
1047 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
1048 offset += todo;
1049 }
1050
1051 offset += padding;
1052 }
1053
1054 return rp;
1055 }
1056
cx25821_risc_buffer(struct pci_dev * pci,struct cx25821_riscmem * risc,struct scatterlist * sglist,unsigned int top_offset,unsigned int bottom_offset,unsigned int bpl,unsigned int padding,unsigned int lines)1057 int cx25821_risc_buffer(struct pci_dev *pci, struct cx25821_riscmem *risc,
1058 struct scatterlist *sglist, unsigned int top_offset,
1059 unsigned int bottom_offset, unsigned int bpl,
1060 unsigned int padding, unsigned int lines)
1061 {
1062 u32 instructions;
1063 u32 fields;
1064 __le32 *rp;
1065 int rc;
1066
1067 fields = 0;
1068 if (UNSET != top_offset)
1069 fields++;
1070 if (UNSET != bottom_offset)
1071 fields++;
1072
1073 /* estimate risc mem: worst case is one write per page border +
1074 one write per scan line + syncs + jump (all 3 dwords). Padding
1075 can cause next bpl to start close to a page border. First DMA
1076 region may be smaller than PAGE_SIZE */
1077 /* write and jump need and extra dword */
1078 instructions = fields * (1 + ((bpl + padding) * lines) / PAGE_SIZE +
1079 lines);
1080 instructions += 5;
1081 rc = cx25821_riscmem_alloc(pci, risc, instructions * 12);
1082
1083 if (rc < 0)
1084 return rc;
1085
1086 /* write risc instructions */
1087 rp = risc->cpu;
1088
1089 if (UNSET != top_offset) {
1090 rp = cx25821_risc_field(rp, sglist, top_offset, 0, bpl, padding,
1091 lines, true);
1092 }
1093
1094 if (UNSET != bottom_offset) {
1095 rp = cx25821_risc_field(rp, sglist, bottom_offset, 0x200, bpl,
1096 padding, lines, UNSET == top_offset);
1097 }
1098
1099 /* save pointer to jmp instruction address */
1100 risc->jmp = rp;
1101 BUG_ON((risc->jmp - risc->cpu + 3) * sizeof(*risc->cpu) > risc->size);
1102
1103 return 0;
1104 }
1105
cx25821_risc_field_audio(__le32 * rp,struct scatterlist * sglist,unsigned int offset,u32 sync_line,unsigned int bpl,unsigned int padding,unsigned int lines,unsigned int lpi)1106 static __le32 *cx25821_risc_field_audio(__le32 * rp, struct scatterlist *sglist,
1107 unsigned int offset, u32 sync_line,
1108 unsigned int bpl, unsigned int padding,
1109 unsigned int lines, unsigned int lpi)
1110 {
1111 struct scatterlist *sg;
1112 unsigned int line, todo, sol;
1113
1114 /* sync instruction */
1115 if (sync_line != NO_SYNC_LINE)
1116 *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
1117
1118 /* scan lines */
1119 sg = sglist;
1120 for (line = 0; line < lines; line++) {
1121 while (offset && offset >= sg_dma_len(sg)) {
1122 offset -= sg_dma_len(sg);
1123 sg = sg_next(sg);
1124 }
1125
1126 if (lpi && line > 0 && !(line % lpi))
1127 sol = RISC_SOL | RISC_IRQ1 | RISC_CNT_INC;
1128 else
1129 sol = RISC_SOL;
1130
1131 if (bpl <= sg_dma_len(sg) - offset) {
1132 /* fits into current chunk */
1133 *(rp++) = cpu_to_le32(RISC_WRITE | sol | RISC_EOL |
1134 bpl);
1135 *(rp++) = cpu_to_le32(sg_dma_address(sg) + offset);
1136 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
1137 offset += bpl;
1138 } else {
1139 /* scanline needs to be split */
1140 todo = bpl;
1141 *(rp++) = cpu_to_le32(RISC_WRITE | sol |
1142 (sg_dma_len(sg) - offset));
1143 *(rp++) = cpu_to_le32(sg_dma_address(sg) + offset);
1144 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
1145 todo -= (sg_dma_len(sg) - offset);
1146 offset = 0;
1147 sg = sg_next(sg);
1148 while (todo > sg_dma_len(sg)) {
1149 *(rp++) = cpu_to_le32(RISC_WRITE |
1150 sg_dma_len(sg));
1151 *(rp++) = cpu_to_le32(sg_dma_address(sg));
1152 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
1153 todo -= sg_dma_len(sg);
1154 sg = sg_next(sg);
1155 }
1156 *(rp++) = cpu_to_le32(RISC_WRITE | RISC_EOL | todo);
1157 *(rp++) = cpu_to_le32(sg_dma_address(sg));
1158 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
1159 offset += todo;
1160 }
1161 offset += padding;
1162 }
1163
1164 return rp;
1165 }
1166
cx25821_risc_databuffer_audio(struct pci_dev * pci,struct cx25821_riscmem * risc,struct scatterlist * sglist,unsigned int bpl,unsigned int lines,unsigned int lpi)1167 int cx25821_risc_databuffer_audio(struct pci_dev *pci,
1168 struct cx25821_riscmem *risc,
1169 struct scatterlist *sglist,
1170 unsigned int bpl,
1171 unsigned int lines, unsigned int lpi)
1172 {
1173 u32 instructions;
1174 __le32 *rp;
1175 int rc;
1176
1177 /* estimate risc mem: worst case is one write per page border +
1178 one write per scan line + syncs + jump (all 2 dwords). Here
1179 there is no padding and no sync. First DMA region may be smaller
1180 than PAGE_SIZE */
1181 /* Jump and write need an extra dword */
1182 instructions = 1 + (bpl * lines) / PAGE_SIZE + lines;
1183 instructions += 1;
1184
1185 rc = cx25821_riscmem_alloc(pci, risc, instructions * 12);
1186 if (rc < 0)
1187 return rc;
1188
1189 /* write risc instructions */
1190 rp = risc->cpu;
1191 rp = cx25821_risc_field_audio(rp, sglist, 0, NO_SYNC_LINE, bpl, 0,
1192 lines, lpi);
1193
1194 /* save pointer to jmp instruction address */
1195 risc->jmp = rp;
1196 BUG_ON((risc->jmp - risc->cpu + 2) * sizeof(*risc->cpu) > risc->size);
1197 return 0;
1198 }
1199 EXPORT_SYMBOL(cx25821_risc_databuffer_audio);
1200
cx25821_free_buffer(struct cx25821_dev * dev,struct cx25821_buffer * buf)1201 void cx25821_free_buffer(struct cx25821_dev *dev, struct cx25821_buffer *buf)
1202 {
1203 if (WARN_ON(buf->risc.size == 0))
1204 return;
1205 dma_free_coherent(&dev->pci->dev, buf->risc.size, buf->risc.cpu,
1206 buf->risc.dma);
1207 memset(&buf->risc, 0, sizeof(buf->risc));
1208 }
1209
cx25821_irq(int irq,void * dev_id)1210 static irqreturn_t cx25821_irq(int irq, void *dev_id)
1211 {
1212 struct cx25821_dev *dev = dev_id;
1213 u32 pci_status;
1214 u32 vid_status;
1215 int i, handled = 0;
1216 u32 mask[8] = { 1, 2, 4, 8, 16, 32, 64, 128 };
1217
1218 pci_status = cx_read(PCI_INT_STAT);
1219
1220 if (pci_status == 0)
1221 goto out;
1222
1223 for (i = 0; i < VID_CHANNEL_NUM; i++) {
1224 if (pci_status & mask[i]) {
1225 vid_status = cx_read(dev->channels[i].
1226 sram_channels->int_stat);
1227
1228 if (vid_status)
1229 handled += cx25821_video_irq(dev, i,
1230 vid_status);
1231
1232 cx_write(PCI_INT_STAT, mask[i]);
1233 }
1234 }
1235
1236 out:
1237 return IRQ_RETVAL(handled);
1238 }
1239
cx25821_print_irqbits(char * name,char * tag,char ** strings,int len,u32 bits,u32 mask)1240 void cx25821_print_irqbits(char *name, char *tag, char **strings,
1241 int len, u32 bits, u32 mask)
1242 {
1243 unsigned int i;
1244
1245 printk(KERN_DEBUG pr_fmt("%s: %s [0x%x]"), name, tag, bits);
1246
1247 for (i = 0; i < len; i++) {
1248 if (!(bits & (1 << i)))
1249 continue;
1250 if (strings[i])
1251 pr_cont(" %s", strings[i]);
1252 else
1253 pr_cont(" %d", i);
1254 if (!(mask & (1 << i)))
1255 continue;
1256 pr_cont("*");
1257 }
1258 pr_cont("\n");
1259 }
1260 EXPORT_SYMBOL(cx25821_print_irqbits);
1261
cx25821_dev_get(struct pci_dev * pci)1262 struct cx25821_dev *cx25821_dev_get(struct pci_dev *pci)
1263 {
1264 struct cx25821_dev *dev = pci_get_drvdata(pci);
1265 return dev;
1266 }
1267 EXPORT_SYMBOL(cx25821_dev_get);
1268
cx25821_initdev(struct pci_dev * pci_dev,const struct pci_device_id * pci_id)1269 static int cx25821_initdev(struct pci_dev *pci_dev,
1270 const struct pci_device_id *pci_id)
1271 {
1272 struct cx25821_dev *dev;
1273 int err = 0;
1274
1275 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1276 if (NULL == dev)
1277 return -ENOMEM;
1278
1279 err = v4l2_device_register(&pci_dev->dev, &dev->v4l2_dev);
1280 if (err < 0)
1281 goto fail_free;
1282
1283 /* pci init */
1284 dev->pci = pci_dev;
1285 if (pci_enable_device(pci_dev)) {
1286 err = -EIO;
1287
1288 pr_info("pci enable failed!\n");
1289
1290 goto fail_unregister_device;
1291 }
1292
1293 err = cx25821_dev_setup(dev);
1294 if (err)
1295 goto fail_unregister_pci;
1296
1297 /* print pci info */
1298 pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &dev->pci_rev);
1299 pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER, &dev->pci_lat);
1300 pr_info("%s/0: found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
1301 dev->name, pci_name(pci_dev), dev->pci_rev, pci_dev->irq,
1302 dev->pci_lat, (unsigned long long)dev->base_io_addr);
1303
1304 pci_set_master(pci_dev);
1305 err = dma_set_mask(&pci_dev->dev, 0xffffffff);
1306 if (err) {
1307 pr_err("%s/0: Oops: no 32bit PCI DMA ???\n", dev->name);
1308 err = -EIO;
1309 goto fail_irq;
1310 }
1311
1312 err = request_irq(pci_dev->irq, cx25821_irq,
1313 IRQF_SHARED, dev->name, dev);
1314
1315 if (err < 0) {
1316 pr_err("%s: can't get IRQ %d\n", dev->name, pci_dev->irq);
1317 goto fail_irq;
1318 }
1319
1320 return 0;
1321
1322 fail_irq:
1323 pr_info("cx25821_initdev() can't get IRQ !\n");
1324 cx25821_dev_unregister(dev);
1325
1326 fail_unregister_pci:
1327 pci_disable_device(pci_dev);
1328 fail_unregister_device:
1329 v4l2_device_unregister(&dev->v4l2_dev);
1330
1331 fail_free:
1332 kfree(dev);
1333 return err;
1334 }
1335
cx25821_finidev(struct pci_dev * pci_dev)1336 static void cx25821_finidev(struct pci_dev *pci_dev)
1337 {
1338 struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev);
1339 struct cx25821_dev *dev = get_cx25821(v4l2_dev);
1340
1341 cx25821_shutdown(dev);
1342 pci_disable_device(pci_dev);
1343
1344 /* unregister stuff */
1345 if (pci_dev->irq)
1346 free_irq(pci_dev->irq, dev);
1347
1348 cx25821_dev_unregister(dev);
1349 v4l2_device_unregister(v4l2_dev);
1350 kfree(dev);
1351 }
1352
1353 static const struct pci_device_id cx25821_pci_tbl[] = {
1354 {
1355 /* CX25821 Athena */
1356 .vendor = 0x14f1,
1357 .device = 0x8210,
1358 .subvendor = 0x14f1,
1359 .subdevice = 0x0920,
1360 }, {
1361 /* CX25821 No Brand */
1362 .vendor = 0x14f1,
1363 .device = 0x8210,
1364 .subvendor = 0x0000,
1365 .subdevice = 0x0000,
1366 }, {
1367 /* --- end of list --- */
1368 }
1369 };
1370
1371 MODULE_DEVICE_TABLE(pci, cx25821_pci_tbl);
1372
1373 static struct pci_driver cx25821_pci_driver = {
1374 .name = "cx25821",
1375 .id_table = cx25821_pci_tbl,
1376 .probe = cx25821_initdev,
1377 .remove = cx25821_finidev,
1378 };
1379
cx25821_init(void)1380 static int __init cx25821_init(void)
1381 {
1382 pr_info("driver loaded\n");
1383 return pci_register_driver(&cx25821_pci_driver);
1384 }
1385
cx25821_fini(void)1386 static void __exit cx25821_fini(void)
1387 {
1388 pci_unregister_driver(&cx25821_pci_driver);
1389 }
1390
1391 module_init(cx25821_init);
1392 module_exit(cx25821_fini);
1393
