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microvm: move virtio base to 0xfeb00000
[qemu/kevin.git] / hw / ssi / aspeed_smc.c
blob4fab1f5f855e0875fb96d40c9796596d5bc6138b
1 /*
2 * ASPEED AST2400 SMC Controller (SPI Flash Only)
3 *
4 * Copyright (C) 2016 IBM Corp.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include "qemu/osdep.h"
26 #include "hw/sysbus.h"
27 #include "migration/vmstate.h"
28 #include "qemu/log.h"
29 #include "qemu/module.h"
30 #include "qemu/error-report.h"
31 #include "qapi/error.h"
32 #include "exec/address-spaces.h"
33 #include "qemu/units.h"
34 #include "trace.h"
35
36 #include "hw/irq.h"
37 #include "hw/qdev-properties.h"
38 #include "hw/ssi/aspeed_smc.h"
39
40 /* CE Type Setting Register */
41 #define R_CONF (0x00 / 4)
42 #define CONF_LEGACY_DISABLE (1 << 31)
43 #define CONF_ENABLE_W4 20
44 #define CONF_ENABLE_W3 19
45 #define CONF_ENABLE_W2 18
46 #define CONF_ENABLE_W1 17
47 #define CONF_ENABLE_W0 16
48 #define CONF_FLASH_TYPE4 8
49 #define CONF_FLASH_TYPE3 6
50 #define CONF_FLASH_TYPE2 4
51 #define CONF_FLASH_TYPE1 2
52 #define CONF_FLASH_TYPE0 0
53 #define CONF_FLASH_TYPE_NOR 0x0
54 #define CONF_FLASH_TYPE_NAND 0x1
55 #define CONF_FLASH_TYPE_SPI 0x2 /* AST2600 is SPI only */
56
57 /* CE Control Register */
58 #define R_CE_CTRL (0x04 / 4)
59 #define CTRL_EXTENDED4 4 /* 32 bit addressing for SPI */
60 #define CTRL_EXTENDED3 3 /* 32 bit addressing for SPI */
61 #define CTRL_EXTENDED2 2 /* 32 bit addressing for SPI */
62 #define CTRL_EXTENDED1 1 /* 32 bit addressing for SPI */
63 #define CTRL_EXTENDED0 0 /* 32 bit addressing for SPI */
64
65 /* Interrupt Control and Status Register */
66 #define R_INTR_CTRL (0x08 / 4)
67 #define INTR_CTRL_DMA_STATUS (1 << 11)
68 #define INTR_CTRL_CMD_ABORT_STATUS (1 << 10)
69 #define INTR_CTRL_WRITE_PROTECT_STATUS (1 << 9)
70 #define INTR_CTRL_DMA_EN (1 << 3)
71 #define INTR_CTRL_CMD_ABORT_EN (1 << 2)
72 #define INTR_CTRL_WRITE_PROTECT_EN (1 << 1)
73
74 /* CEx Control Register */
75 #define R_CTRL0 (0x10 / 4)
76 #define CTRL_IO_QPI (1 << 31)
77 #define CTRL_IO_QUAD_DATA (1 << 30)
78 #define CTRL_IO_DUAL_DATA (1 << 29)
79 #define CTRL_IO_DUAL_ADDR_DATA (1 << 28) /* Includes dummies */
80 #define CTRL_IO_QUAD_ADDR_DATA (1 << 28) /* Includes dummies */
81 #define CTRL_CMD_SHIFT 16
82 #define CTRL_CMD_MASK 0xff
83 #define CTRL_DUMMY_HIGH_SHIFT 14
84 #define CTRL_AST2400_SPI_4BYTE (1 << 13)
85 #define CE_CTRL_CLOCK_FREQ_SHIFT 8
86 #define CE_CTRL_CLOCK_FREQ_MASK 0xf
87 #define CE_CTRL_CLOCK_FREQ(div) \
88 (((div) & CE_CTRL_CLOCK_FREQ_MASK) << CE_CTRL_CLOCK_FREQ_SHIFT)
89 #define CTRL_DUMMY_LOW_SHIFT 6 /* 2 bits [7:6] */
90 #define CTRL_CE_STOP_ACTIVE (1 << 2)
91 #define CTRL_CMD_MODE_MASK 0x3
92 #define CTRL_READMODE 0x0
93 #define CTRL_FREADMODE 0x1
94 #define CTRL_WRITEMODE 0x2
95 #define CTRL_USERMODE 0x3
96 #define R_CTRL1 (0x14 / 4)
97 #define R_CTRL2 (0x18 / 4)
98 #define R_CTRL3 (0x1C / 4)
99 #define R_CTRL4 (0x20 / 4)
100
101 /* CEx Segment Address Register */
102 #define R_SEG_ADDR0 (0x30 / 4)
103 #define SEG_END_SHIFT 24 /* 8MB units */
104 #define SEG_END_MASK 0xff
105 #define SEG_START_SHIFT 16 /* address bit [A29-A23] */
106 #define SEG_START_MASK 0xff
107 #define R_SEG_ADDR1 (0x34 / 4)
108 #define R_SEG_ADDR2 (0x38 / 4)
109 #define R_SEG_ADDR3 (0x3C / 4)
110 #define R_SEG_ADDR4 (0x40 / 4)
111
112 /* Misc Control Register #1 */
113 #define R_MISC_CTRL1 (0x50 / 4)
114
115 /* SPI dummy cycle data */
116 #define R_DUMMY_DATA (0x54 / 4)
117
118 /* DMA Control/Status Register */
119 #define R_DMA_CTRL (0x80 / 4)
120 #define DMA_CTRL_DELAY_MASK 0xf
121 #define DMA_CTRL_DELAY_SHIFT 8
122 #define DMA_CTRL_FREQ_MASK 0xf
123 #define DMA_CTRL_FREQ_SHIFT 4
124 #define DMA_CTRL_CALIB (1 << 3)
125 #define DMA_CTRL_CKSUM (1 << 2)
126 #define DMA_CTRL_WRITE (1 << 1)
127 #define DMA_CTRL_ENABLE (1 << 0)
128
129 /* DMA Flash Side Address */
130 #define R_DMA_FLASH_ADDR (0x84 / 4)
131
132 /* DMA DRAM Side Address */
133 #define R_DMA_DRAM_ADDR (0x88 / 4)
134
135 /* DMA Length Register */
136 #define R_DMA_LEN (0x8C / 4)
137
138 /* Checksum Calculation Result */
139 #define R_DMA_CHECKSUM (0x90 / 4)
140
141 /* Read Timing Compensation Register */
142 #define R_TIMINGS (0x94 / 4)
143
144 /* SPI controller registers and bits (AST2400) */
145 #define R_SPI_CONF (0x00 / 4)
146 #define SPI_CONF_ENABLE_W0 0
147 #define R_SPI_CTRL0 (0x4 / 4)
148 #define R_SPI_MISC_CTRL (0x10 / 4)
149 #define R_SPI_TIMINGS (0x14 / 4)
150
151 #define ASPEED_SMC_R_SPI_MAX (0x20 / 4)
152 #define ASPEED_SMC_R_SMC_MAX (0x20 / 4)
153
154 #define ASPEED_SOC_SMC_FLASH_BASE 0x10000000
155 #define ASPEED_SOC_FMC_FLASH_BASE 0x20000000
156 #define ASPEED_SOC_SPI_FLASH_BASE 0x30000000
157 #define ASPEED_SOC_SPI2_FLASH_BASE 0x38000000
158
159 /*
160 * DMA DRAM addresses should be 4 bytes aligned and the valid address
161 * range is 0x40000000 - 0x5FFFFFFF (AST2400)
162 * 0x80000000 - 0xBFFFFFFF (AST2500)
163 *
164 * DMA flash addresses should be 4 bytes aligned and the valid address
165 * range is 0x20000000 - 0x2FFFFFFF.
166 *
167 * DMA length is from 4 bytes to 32MB
168 * 0: 4 bytes
169 * 0x7FFFFF: 32M bytes
170 */
171 #define DMA_DRAM_ADDR(s, val) ((s)->sdram_base | \
172 ((val) & (s)->ctrl->dma_dram_mask))
173 #define DMA_FLASH_ADDR(s, val) ((s)->ctrl->flash_window_base | \
174 ((val) & (s)->ctrl->dma_flash_mask))
175 #define DMA_LENGTH(val) ((val) & 0x01FFFFFC)
176
177 /* Flash opcodes. */
178 #define SPI_OP_READ 0x03 /* Read data bytes (low frequency) */
179
180 #define SNOOP_OFF 0xFF
181 #define SNOOP_START 0x0
182
183 /*
184 * Default segments mapping addresses and size for each slave per
185 * controller. These can be changed when board is initialized with the
186 * Segment Address Registers.
187 */
188 static const AspeedSegments aspeed_segments_legacy[] = {
189 { 0x10000000, 32 * 1024 * 1024 },
190 };
191
192 static const AspeedSegments aspeed_segments_fmc[] = {
193 { 0x20000000, 64 * 1024 * 1024 }, /* start address is readonly */
194 { 0x24000000, 32 * 1024 * 1024 },
195 { 0x26000000, 32 * 1024 * 1024 },
196 { 0x28000000, 32 * 1024 * 1024 },
197 { 0x2A000000, 32 * 1024 * 1024 }
198 };
199
200 static const AspeedSegments aspeed_segments_spi[] = {
201 { 0x30000000, 64 * 1024 * 1024 },
202 };
203
204 static const AspeedSegments aspeed_segments_ast2500_fmc[] = {
205 { 0x20000000, 128 * 1024 * 1024 }, /* start address is readonly */
206 { 0x28000000, 32 * 1024 * 1024 },
207 { 0x2A000000, 32 * 1024 * 1024 },
208 };
209
210 static const AspeedSegments aspeed_segments_ast2500_spi1[] = {
211 { 0x30000000, 32 * 1024 * 1024 }, /* start address is readonly */
212 { 0x32000000, 96 * 1024 * 1024 }, /* end address is readonly */
213 };
214
215 static const AspeedSegments aspeed_segments_ast2500_spi2[] = {
216 { 0x38000000, 32 * 1024 * 1024 }, /* start address is readonly */
217 { 0x3A000000, 96 * 1024 * 1024 }, /* end address is readonly */
218 };
219 static uint32_t aspeed_smc_segment_to_reg(const AspeedSMCState *s,
220 const AspeedSegments *seg);
221 static void aspeed_smc_reg_to_segment(const AspeedSMCState *s, uint32_t reg,
222 AspeedSegments *seg);
223
224 /*
225 * AST2600 definitions
226 */
227 #define ASPEED26_SOC_FMC_FLASH_BASE 0x20000000
228 #define ASPEED26_SOC_SPI_FLASH_BASE 0x30000000
229 #define ASPEED26_SOC_SPI2_FLASH_BASE 0x50000000
230
231 static const AspeedSegments aspeed_segments_ast2600_fmc[] = {
232 { 0x0, 128 * MiB }, /* start address is readonly */
233 { 0x0, 0 }, /* disabled */
234 { 0x0, 0 }, /* disabled */
235 };
236
237 static const AspeedSegments aspeed_segments_ast2600_spi1[] = {
238 { 0x0, 128 * MiB }, /* start address is readonly */
239 { 0x0, 0 }, /* disabled */
240 };
241
242 static const AspeedSegments aspeed_segments_ast2600_spi2[] = {
243 { 0x0, 128 * MiB }, /* start address is readonly */
244 { 0x0, 0 }, /* disabled */
245 { 0x0, 0 }, /* disabled */
246 };
247
248 static uint32_t aspeed_2600_smc_segment_to_reg(const AspeedSMCState *s,
249 const AspeedSegments *seg);
250 static void aspeed_2600_smc_reg_to_segment(const AspeedSMCState *s,
251 uint32_t reg, AspeedSegments *seg);
252
253 static const AspeedSMCController controllers[] = {
254 {
255 .name = "aspeed.smc-ast2400",
256 .r_conf = R_CONF,
257 .r_ce_ctrl = R_CE_CTRL,
258 .r_ctrl0 = R_CTRL0,
259 .r_timings = R_TIMINGS,
260 .nregs_timings = 1,
261 .conf_enable_w0 = CONF_ENABLE_W0,
262 .max_slaves = 5,
263 .segments = aspeed_segments_legacy,
264 .flash_window_base = ASPEED_SOC_SMC_FLASH_BASE,
265 .flash_window_size = 0x6000000,
266 .has_dma = false,
267 .nregs = ASPEED_SMC_R_SMC_MAX,
268 .segment_to_reg = aspeed_smc_segment_to_reg,
269 .reg_to_segment = aspeed_smc_reg_to_segment,
270 }, {
271 .name = "aspeed.fmc-ast2400",
272 .r_conf = R_CONF,
273 .r_ce_ctrl = R_CE_CTRL,
274 .r_ctrl0 = R_CTRL0,
275 .r_timings = R_TIMINGS,
276 .nregs_timings = 1,
277 .conf_enable_w0 = CONF_ENABLE_W0,
278 .max_slaves = 5,
279 .segments = aspeed_segments_fmc,
280 .flash_window_base = ASPEED_SOC_FMC_FLASH_BASE,
281 .flash_window_size = 0x10000000,
282 .has_dma = true,
283 .dma_flash_mask = 0x0FFFFFFC,
284 .dma_dram_mask = 0x1FFFFFFC,
285 .nregs = ASPEED_SMC_R_MAX,
286 .segment_to_reg = aspeed_smc_segment_to_reg,
287 .reg_to_segment = aspeed_smc_reg_to_segment,
288 }, {
289 .name = "aspeed.spi1-ast2400",
290 .r_conf = R_SPI_CONF,
291 .r_ce_ctrl = 0xff,
292 .r_ctrl0 = R_SPI_CTRL0,
293 .r_timings = R_SPI_TIMINGS,
294 .nregs_timings = 1,
295 .conf_enable_w0 = SPI_CONF_ENABLE_W0,
296 .max_slaves = 1,
297 .segments = aspeed_segments_spi,
298 .flash_window_base = ASPEED_SOC_SPI_FLASH_BASE,
299 .flash_window_size = 0x10000000,
300 .has_dma = false,
301 .nregs = ASPEED_SMC_R_SPI_MAX,
302 .segment_to_reg = aspeed_smc_segment_to_reg,
303 .reg_to_segment = aspeed_smc_reg_to_segment,
304 }, {
305 .name = "aspeed.fmc-ast2500",
306 .r_conf = R_CONF,
307 .r_ce_ctrl = R_CE_CTRL,
308 .r_ctrl0 = R_CTRL0,
309 .r_timings = R_TIMINGS,
310 .nregs_timings = 1,
311 .conf_enable_w0 = CONF_ENABLE_W0,
312 .max_slaves = 3,
313 .segments = aspeed_segments_ast2500_fmc,
314 .flash_window_base = ASPEED_SOC_FMC_FLASH_BASE,
315 .flash_window_size = 0x10000000,
316 .has_dma = true,
317 .dma_flash_mask = 0x0FFFFFFC,
318 .dma_dram_mask = 0x3FFFFFFC,
319 .nregs = ASPEED_SMC_R_MAX,
320 .segment_to_reg = aspeed_smc_segment_to_reg,
321 .reg_to_segment = aspeed_smc_reg_to_segment,
322 }, {
323 .name = "aspeed.spi1-ast2500",
324 .r_conf = R_CONF,
325 .r_ce_ctrl = R_CE_CTRL,
326 .r_ctrl0 = R_CTRL0,
327 .r_timings = R_TIMINGS,
328 .nregs_timings = 1,
329 .conf_enable_w0 = CONF_ENABLE_W0,
330 .max_slaves = 2,
331 .segments = aspeed_segments_ast2500_spi1,
332 .flash_window_base = ASPEED_SOC_SPI_FLASH_BASE,
333 .flash_window_size = 0x8000000,
334 .has_dma = false,
335 .nregs = ASPEED_SMC_R_MAX,
336 .segment_to_reg = aspeed_smc_segment_to_reg,
337 .reg_to_segment = aspeed_smc_reg_to_segment,
338 }, {
339 .name = "aspeed.spi2-ast2500",
340 .r_conf = R_CONF,
341 .r_ce_ctrl = R_CE_CTRL,
342 .r_ctrl0 = R_CTRL0,
343 .r_timings = R_TIMINGS,
344 .nregs_timings = 1,
345 .conf_enable_w0 = CONF_ENABLE_W0,
346 .max_slaves = 2,
347 .segments = aspeed_segments_ast2500_spi2,
348 .flash_window_base = ASPEED_SOC_SPI2_FLASH_BASE,
349 .flash_window_size = 0x8000000,
350 .has_dma = false,
351 .nregs = ASPEED_SMC_R_MAX,
352 .segment_to_reg = aspeed_smc_segment_to_reg,
353 .reg_to_segment = aspeed_smc_reg_to_segment,
354 }, {
355 .name = "aspeed.fmc-ast2600",
356 .r_conf = R_CONF,
357 .r_ce_ctrl = R_CE_CTRL,
358 .r_ctrl0 = R_CTRL0,
359 .r_timings = R_TIMINGS,
360 .nregs_timings = 1,
361 .conf_enable_w0 = CONF_ENABLE_W0,
362 .max_slaves = 3,
363 .segments = aspeed_segments_ast2600_fmc,
364 .flash_window_base = ASPEED26_SOC_FMC_FLASH_BASE,
365 .flash_window_size = 0x10000000,
366 .has_dma = true,
367 .dma_flash_mask = 0x0FFFFFFC,
368 .dma_dram_mask = 0x3FFFFFFC,
369 .nregs = ASPEED_SMC_R_MAX,
370 .segment_to_reg = aspeed_2600_smc_segment_to_reg,
371 .reg_to_segment = aspeed_2600_smc_reg_to_segment,
372 }, {
373 .name = "aspeed.spi1-ast2600",
374 .r_conf = R_CONF,
375 .r_ce_ctrl = R_CE_CTRL,
376 .r_ctrl0 = R_CTRL0,
377 .r_timings = R_TIMINGS,
378 .nregs_timings = 2,
379 .conf_enable_w0 = CONF_ENABLE_W0,
380 .max_slaves = 2,
381 .segments = aspeed_segments_ast2600_spi1,
382 .flash_window_base = ASPEED26_SOC_SPI_FLASH_BASE,
383 .flash_window_size = 0x10000000,
384 .has_dma = true,
385 .dma_flash_mask = 0x0FFFFFFC,
386 .dma_dram_mask = 0x3FFFFFFC,
387 .nregs = ASPEED_SMC_R_MAX,
388 .segment_to_reg = aspeed_2600_smc_segment_to_reg,
389 .reg_to_segment = aspeed_2600_smc_reg_to_segment,
390 }, {
391 .name = "aspeed.spi2-ast2600",
392 .r_conf = R_CONF,
393 .r_ce_ctrl = R_CE_CTRL,
394 .r_ctrl0 = R_CTRL0,
395 .r_timings = R_TIMINGS,
396 .nregs_timings = 3,
397 .conf_enable_w0 = CONF_ENABLE_W0,
398 .max_slaves = 3,
399 .segments = aspeed_segments_ast2600_spi2,
400 .flash_window_base = ASPEED26_SOC_SPI2_FLASH_BASE,
401 .flash_window_size = 0x10000000,
402 .has_dma = true,
403 .dma_flash_mask = 0x0FFFFFFC,
404 .dma_dram_mask = 0x3FFFFFFC,
405 .nregs = ASPEED_SMC_R_MAX,
406 .segment_to_reg = aspeed_2600_smc_segment_to_reg,
407 .reg_to_segment = aspeed_2600_smc_reg_to_segment,
408 },
409 };
410
411 /*
412 * The Segment Registers of the AST2400 and AST2500 have a 8MB
413 * unit. The address range of a flash SPI slave is encoded with
414 * absolute addresses which should be part of the overall controller
415 * window.
416 */
417 static uint32_t aspeed_smc_segment_to_reg(const AspeedSMCState *s,
418 const AspeedSegments *seg)
419 {
420 uint32_t reg = 0;
421 reg |= ((seg->addr >> 23) & SEG_START_MASK) << SEG_START_SHIFT;
422 reg |= (((seg->addr + seg->size) >> 23) & SEG_END_MASK) << SEG_END_SHIFT;
423 return reg;
424 }
425
426 static void aspeed_smc_reg_to_segment(const AspeedSMCState *s,
427 uint32_t reg, AspeedSegments *seg)
428 {
429 seg->addr = ((reg >> SEG_START_SHIFT) & SEG_START_MASK) << 23;
430 seg->size = (((reg >> SEG_END_SHIFT) & SEG_END_MASK) << 23) - seg->addr;
431 }
432
433 /*
434 * The Segment Registers of the AST2600 have a 1MB unit. The address
435 * range of a flash SPI slave is encoded with offsets in the overall
436 * controller window. The previous SoC AST2400 and AST2500 used
437 * absolute addresses. Only bits [27:20] are relevant and the end
438 * address is an upper bound limit.
439 */
440 #define AST2600_SEG_ADDR_MASK 0x0ff00000
441
442 static uint32_t aspeed_2600_smc_segment_to_reg(const AspeedSMCState *s,
443 const AspeedSegments *seg)
444 {
445 uint32_t reg = 0;
446
447 /* Disabled segments have a nil register */
448 if (!seg->size) {
449 return 0;
450 }
451
452 reg |= (seg->addr & AST2600_SEG_ADDR_MASK) >> 16; /* start offset */
453 reg |= (seg->addr + seg->size - 1) & AST2600_SEG_ADDR_MASK; /* end offset */
454 return reg;
455 }
456
457 static void aspeed_2600_smc_reg_to_segment(const AspeedSMCState *s,
458 uint32_t reg, AspeedSegments *seg)
459 {
460 uint32_t start_offset = (reg << 16) & AST2600_SEG_ADDR_MASK;
461 uint32_t end_offset = reg & AST2600_SEG_ADDR_MASK;
462
463 if (reg) {
464 seg->addr = s->ctrl->flash_window_base + start_offset;
465 seg->size = end_offset + MiB - start_offset;
466 } else {
467 seg->addr = s->ctrl->flash_window_base;
468 seg->size = 0;
469 }
470 }
471
472 static bool aspeed_smc_flash_overlap(const AspeedSMCState *s,
473 const AspeedSegments *new,
474 int cs)
475 {
476 AspeedSegments seg;
477 int i;
478
479 for (i = 0; i < s->ctrl->max_slaves; i++) {
480 if (i == cs) {
481 continue;
482 }
483
484 s->ctrl->reg_to_segment(s, s->regs[R_SEG_ADDR0 + i], &seg);
485
486 if (new->addr + new->size > seg.addr &&
487 new->addr < seg.addr + seg.size) {
488 qemu_log_mask(LOG_GUEST_ERROR, "%s: new segment CS%d [ 0x%"
489 HWADDR_PRIx" - 0x%"HWADDR_PRIx" ] overlaps with "
490 "CS%d [ 0x%"HWADDR_PRIx" - 0x%"HWADDR_PRIx" ]\n",
491 s->ctrl->name, cs, new->addr, new->addr + new->size,
492 i, seg.addr, seg.addr + seg.size);
493 return true;
494 }
495 }
496 return false;
497 }
498
499 static void aspeed_smc_flash_set_segment_region(AspeedSMCState *s, int cs,
500 uint64_t regval)
501 {
502 AspeedSMCFlash *fl = &s->flashes[cs];
503 AspeedSegments seg;
504
505 s->ctrl->reg_to_segment(s, regval, &seg);
506
507 memory_region_transaction_begin();
508 memory_region_set_size(&fl->mmio, seg.size);
509 memory_region_set_address(&fl->mmio, seg.addr - s->ctrl->flash_window_base);
510 memory_region_set_enabled(&fl->mmio, !!seg.size);
511 memory_region_transaction_commit();
512
513 s->regs[R_SEG_ADDR0 + cs] = regval;
514 }
515
516 static void aspeed_smc_flash_set_segment(AspeedSMCState *s, int cs,
517 uint64_t new)
518 {
519 AspeedSegments seg;
520
521 s->ctrl->reg_to_segment(s, new, &seg);
522
523 trace_aspeed_smc_flash_set_segment(cs, new, seg.addr, seg.addr + seg.size);
524
525 /* The start address of CS0 is read-only */
526 if (cs == 0 && seg.addr != s->ctrl->flash_window_base) {
527 qemu_log_mask(LOG_GUEST_ERROR,
528 "%s: Tried to change CS0 start address to 0x%"
529 HWADDR_PRIx "\n", s->ctrl->name, seg.addr);
530 seg.addr = s->ctrl->flash_window_base;
531 new = s->ctrl->segment_to_reg(s, &seg);
532 }
533
534 /*
535 * The end address of the AST2500 spi controllers is also
536 * read-only.
537 */
538 if ((s->ctrl->segments == aspeed_segments_ast2500_spi1 ||
539 s->ctrl->segments == aspeed_segments_ast2500_spi2) &&
540 cs == s->ctrl->max_slaves &&
541 seg.addr + seg.size != s->ctrl->segments[cs].addr +
542 s->ctrl->segments[cs].size) {
543 qemu_log_mask(LOG_GUEST_ERROR,
544 "%s: Tried to change CS%d end address to 0x%"
545 HWADDR_PRIx "\n", s->ctrl->name, cs, seg.addr + seg.size);
546 seg.size = s->ctrl->segments[cs].addr + s->ctrl->segments[cs].size -
547 seg.addr;
548 new = s->ctrl->segment_to_reg(s, &seg);
549 }
550
551 /* Keep the segment in the overall flash window */
552 if (seg.size &&
553 (seg.addr + seg.size <= s->ctrl->flash_window_base ||
554 seg.addr > s->ctrl->flash_window_base + s->ctrl->flash_window_size)) {
555 qemu_log_mask(LOG_GUEST_ERROR, "%s: new segment for CS%d is invalid : "
556 "[ 0x%"HWADDR_PRIx" - 0x%"HWADDR_PRIx" ]\n",
557 s->ctrl->name, cs, seg.addr, seg.addr + seg.size);
558 return;
559 }
560
561 /* Check start address vs. alignment */
562 if (seg.size && !QEMU_IS_ALIGNED(seg.addr, seg.size)) {
563 qemu_log_mask(LOG_GUEST_ERROR, "%s: new segment for CS%d is not "
564 "aligned : [ 0x%"HWADDR_PRIx" - 0x%"HWADDR_PRIx" ]\n",
565 s->ctrl->name, cs, seg.addr, seg.addr + seg.size);
566 }
567
568 /* And segments should not overlap (in the specs) */
569 aspeed_smc_flash_overlap(s, &seg, cs);
570
571 /* All should be fine now to move the region */
572 aspeed_smc_flash_set_segment_region(s, cs, new);
573 }
574
575 static uint64_t aspeed_smc_flash_default_read(void *opaque, hwaddr addr,
576 unsigned size)
577 {
578 qemu_log_mask(LOG_GUEST_ERROR, "%s: To 0x%" HWADDR_PRIx " of size %u"
579 PRIx64 "\n", __func__, addr, size);
580 return 0;
581 }
582
583 static void aspeed_smc_flash_default_write(void *opaque, hwaddr addr,
584 uint64_t data, unsigned size)
585 {
586 qemu_log_mask(LOG_GUEST_ERROR, "%s: To 0x%" HWADDR_PRIx " of size %u: 0x%"
587 PRIx64 "\n", __func__, addr, size, data);
588 }
589
590 static const MemoryRegionOps aspeed_smc_flash_default_ops = {
591 .read = aspeed_smc_flash_default_read,
592 .write = aspeed_smc_flash_default_write,
593 .endianness = DEVICE_LITTLE_ENDIAN,
594 .valid = {
595 .min_access_size = 1,
596 .max_access_size = 4,
597 },
598 };
599
600 static inline int aspeed_smc_flash_mode(const AspeedSMCFlash *fl)
601 {
602 const AspeedSMCState *s = fl->controller;
603
604 return s->regs[s->r_ctrl0 + fl->id] & CTRL_CMD_MODE_MASK;
605 }
606
607 static inline bool aspeed_smc_is_writable(const AspeedSMCFlash *fl)
608 {
609 const AspeedSMCState *s = fl->controller;
610
611 return s->regs[s->r_conf] & (1 << (s->conf_enable_w0 + fl->id));
612 }
613
614 static inline int aspeed_smc_flash_cmd(const AspeedSMCFlash *fl)
615 {
616 const AspeedSMCState *s = fl->controller;
617 int cmd = (s->regs[s->r_ctrl0 + fl->id] >> CTRL_CMD_SHIFT) & CTRL_CMD_MASK;
618
619 /*
620 * In read mode, the default SPI command is READ (0x3). In other
621 * modes, the command should necessarily be defined
622 *
623 * TODO: add support for READ4 (0x13) on AST2600
624 */
625 if (aspeed_smc_flash_mode(fl) == CTRL_READMODE) {
626 cmd = SPI_OP_READ;
627 }
628
629 if (!cmd) {
630 qemu_log_mask(LOG_GUEST_ERROR, "%s: no command defined for mode %d\n",
631 __func__, aspeed_smc_flash_mode(fl));
632 }
633
634 return cmd;
635 }
636
637 static inline int aspeed_smc_flash_is_4byte(const AspeedSMCFlash *fl)
638 {
639 const AspeedSMCState *s = fl->controller;
640
641 if (s->ctrl->segments == aspeed_segments_spi) {
642 return s->regs[s->r_ctrl0] & CTRL_AST2400_SPI_4BYTE;
643 } else {
644 return s->regs[s->r_ce_ctrl] & (1 << (CTRL_EXTENDED0 + fl->id));
645 }
646 }
647
648 static void aspeed_smc_flash_do_select(AspeedSMCFlash *fl, bool unselect)
649 {
650 AspeedSMCState *s = fl->controller;
651
652 trace_aspeed_smc_flash_select(fl->id, unselect ? "un" : "");
653
654 qemu_set_irq(s->cs_lines[fl->id], unselect);
655 }
656
657 static void aspeed_smc_flash_select(AspeedSMCFlash *fl)
658 {
659 aspeed_smc_flash_do_select(fl, false);
660 }
661
662 static void aspeed_smc_flash_unselect(AspeedSMCFlash *fl)
663 {
664 aspeed_smc_flash_do_select(fl, true);
665 }
666
667 static uint32_t aspeed_smc_check_segment_addr(const AspeedSMCFlash *fl,
668 uint32_t addr)
669 {
670 const AspeedSMCState *s = fl->controller;
671 AspeedSegments seg;
672
673 s->ctrl->reg_to_segment(s, s->regs[R_SEG_ADDR0 + fl->id], &seg);
674 if ((addr % seg.size) != addr) {
675 qemu_log_mask(LOG_GUEST_ERROR,
676 "%s: invalid address 0x%08x for CS%d segment : "
677 "[ 0x%"HWADDR_PRIx" - 0x%"HWADDR_PRIx" ]\n",
678 s->ctrl->name, addr, fl->id, seg.addr,
679 seg.addr + seg.size);
680 addr %= seg.size;
681 }
682
683 return addr;
684 }
685
686 static int aspeed_smc_flash_dummies(const AspeedSMCFlash *fl)
687 {
688 const AspeedSMCState *s = fl->controller;
689 uint32_t r_ctrl0 = s->regs[s->r_ctrl0 + fl->id];
690 uint32_t dummy_high = (r_ctrl0 >> CTRL_DUMMY_HIGH_SHIFT) & 0x1;
691 uint32_t dummy_low = (r_ctrl0 >> CTRL_DUMMY_LOW_SHIFT) & 0x3;
692 uint32_t dummies = ((dummy_high << 2) | dummy_low) * 8;
693
694 if (r_ctrl0 & CTRL_IO_DUAL_ADDR_DATA) {
695 dummies /= 2;
696 }
697
698 return dummies;
699 }
700
701 static void aspeed_smc_flash_setup(AspeedSMCFlash *fl, uint32_t addr)
702 {
703 const AspeedSMCState *s = fl->controller;
704 uint8_t cmd = aspeed_smc_flash_cmd(fl);
705 int i;
706
707 /* Flash access can not exceed CS segment */
708 addr = aspeed_smc_check_segment_addr(fl, addr);
709
710 ssi_transfer(s->spi, cmd);
711
712 if (aspeed_smc_flash_is_4byte(fl)) {
713 ssi_transfer(s->spi, (addr >> 24) & 0xff);
714 }
715 ssi_transfer(s->spi, (addr >> 16) & 0xff);
716 ssi_transfer(s->spi, (addr >> 8) & 0xff);
717 ssi_transfer(s->spi, (addr & 0xff));
718
719 /*
720 * Use fake transfers to model dummy bytes. The value should
721 * be configured to some non-zero value in fast read mode and
722 * zero in read mode. But, as the HW allows inconsistent
723 * settings, let's check for fast read mode.
724 */
725 if (aspeed_smc_flash_mode(fl) == CTRL_FREADMODE) {
726 for (i = 0; i < aspeed_smc_flash_dummies(fl); i++) {
727 ssi_transfer(fl->controller->spi, s->regs[R_DUMMY_DATA] & 0xff);
728 }
729 }
730 }
731
732 static uint64_t aspeed_smc_flash_read(void *opaque, hwaddr addr, unsigned size)
733 {
734 AspeedSMCFlash *fl = opaque;
735 AspeedSMCState *s = fl->controller;
736 uint64_t ret = 0;
737 int i;
738
739 switch (aspeed_smc_flash_mode(fl)) {
740 case CTRL_USERMODE:
741 for (i = 0; i < size; i++) {
742 ret |= ssi_transfer(s->spi, 0x0) << (8 * i);
743 }
744 break;
745 case CTRL_READMODE:
746 case CTRL_FREADMODE:
747 aspeed_smc_flash_select(fl);
748 aspeed_smc_flash_setup(fl, addr);
749
750 for (i = 0; i < size; i++) {
751 ret |= ssi_transfer(s->spi, 0x0) << (8 * i);
752 }
753
754 aspeed_smc_flash_unselect(fl);
755 break;
756 default:
757 qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid flash mode %d\n",
758 __func__, aspeed_smc_flash_mode(fl));
759 }
760
761 trace_aspeed_smc_flash_read(fl->id, addr, size, ret,
762 aspeed_smc_flash_mode(fl));
763 return ret;
764 }
765
766 /*
767 * TODO (clg@kaod.org): stolen from xilinx_spips.c. Should move to a
768 * common include header.
769 */
770 typedef enum {
771 READ = 0x3, READ_4 = 0x13,
772 FAST_READ = 0xb, FAST_READ_4 = 0x0c,
773 DOR = 0x3b, DOR_4 = 0x3c,
774 QOR = 0x6b, QOR_4 = 0x6c,
775 DIOR = 0xbb, DIOR_4 = 0xbc,
776 QIOR = 0xeb, QIOR_4 = 0xec,
777
778 PP = 0x2, PP_4 = 0x12,
779 DPP = 0xa2,
780 QPP = 0x32, QPP_4 = 0x34,
781 } FlashCMD;
782
783 static int aspeed_smc_num_dummies(uint8_t command)
784 {
785 switch (command) { /* check for dummies */
786 case READ: /* no dummy bytes/cycles */
787 case PP:
788 case DPP:
789 case QPP:
790 case READ_4:
791 case PP_4:
792 case QPP_4:
793 return 0;
794 case FAST_READ:
795 case DOR:
796 case QOR:
797 case FAST_READ_4:
798 case DOR_4:
799 case QOR_4:
800 return 1;
801 case DIOR:
802 case DIOR_4:
803 return 2;
804 case QIOR:
805 case QIOR_4:
806 return 4;
807 default:
808 return -1;
809 }
810 }
811
812 static bool aspeed_smc_do_snoop(AspeedSMCFlash *fl, uint64_t data,
813 unsigned size)
814 {
815 AspeedSMCState *s = fl->controller;
816 uint8_t addr_width = aspeed_smc_flash_is_4byte(fl) ? 4 : 3;
817
818 trace_aspeed_smc_do_snoop(fl->id, s->snoop_index, s->snoop_dummies,
819 (uint8_t) data & 0xff);
820
821 if (s->snoop_index == SNOOP_OFF) {
822 return false; /* Do nothing */
823
824 } else if (s->snoop_index == SNOOP_START) {
825 uint8_t cmd = data & 0xff;
826 int ndummies = aspeed_smc_num_dummies(cmd);
827
828 /*
829 * No dummy cycles are expected with the current command. Turn
830 * off snooping and let the transfer proceed normally.
831 */
832 if (ndummies <= 0) {
833 s->snoop_index = SNOOP_OFF;
834 return false;
835 }
836
837 s->snoop_dummies = ndummies * 8;
838
839 } else if (s->snoop_index >= addr_width + 1) {
840
841 /* The SPI transfer has reached the dummy cycles sequence */
842 for (; s->snoop_dummies; s->snoop_dummies--) {
843 ssi_transfer(s->spi, s->regs[R_DUMMY_DATA] & 0xff);
844 }
845
846 /* If no more dummy cycles are expected, turn off snooping */
847 if (!s->snoop_dummies) {
848 s->snoop_index = SNOOP_OFF;
849 } else {
850 s->snoop_index += size;
851 }
852
853 /*
854 * Dummy cycles have been faked already. Ignore the current
855 * SPI transfer
856 */
857 return true;
858 }
859
860 s->snoop_index += size;
861 return false;
862 }
863
864 static void aspeed_smc_flash_write(void *opaque, hwaddr addr, uint64_t data,
865 unsigned size)
866 {
867 AspeedSMCFlash *fl = opaque;
868 AspeedSMCState *s = fl->controller;
869 int i;
870
871 trace_aspeed_smc_flash_write(fl->id, addr, size, data,
872 aspeed_smc_flash_mode(fl));
873
874 if (!aspeed_smc_is_writable(fl)) {
875 qemu_log_mask(LOG_GUEST_ERROR, "%s: flash is not writable at 0x%"
876 HWADDR_PRIx "\n", __func__, addr);
877 return;
878 }
879
880 switch (aspeed_smc_flash_mode(fl)) {
881 case CTRL_USERMODE:
882 if (aspeed_smc_do_snoop(fl, data, size)) {
883 break;
884 }
885
886 for (i = 0; i < size; i++) {
887 ssi_transfer(s->spi, (data >> (8 * i)) & 0xff);
888 }
889 break;
890 case CTRL_WRITEMODE:
891 aspeed_smc_flash_select(fl);
892 aspeed_smc_flash_setup(fl, addr);
893
894 for (i = 0; i < size; i++) {
895 ssi_transfer(s->spi, (data >> (8 * i)) & 0xff);
896 }
897
898 aspeed_smc_flash_unselect(fl);
899 break;
900 default:
901 qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid flash mode %d\n",
902 __func__, aspeed_smc_flash_mode(fl));
903 }
904 }
905
906 static const MemoryRegionOps aspeed_smc_flash_ops = {
907 .read = aspeed_smc_flash_read,
908 .write = aspeed_smc_flash_write,
909 .endianness = DEVICE_LITTLE_ENDIAN,
910 .valid = {
911 .min_access_size = 1,
912 .max_access_size = 4,
913 },
914 };
915
916 static void aspeed_smc_flash_update_ctrl(AspeedSMCFlash *fl, uint32_t value)
917 {
918 AspeedSMCState *s = fl->controller;
919 bool unselect;
920
921 /* User mode selects the CS, other modes unselect */
922 unselect = (value & CTRL_CMD_MODE_MASK) != CTRL_USERMODE;
923
924 /* A change of CTRL_CE_STOP_ACTIVE from 0 to 1, unselects the CS */
925 if (!(s->regs[s->r_ctrl0 + fl->id] & CTRL_CE_STOP_ACTIVE) &&
926 value & CTRL_CE_STOP_ACTIVE) {
927 unselect = true;
928 }
929
930 s->regs[s->r_ctrl0 + fl->id] = value;
931
932 s->snoop_index = unselect ? SNOOP_OFF : SNOOP_START;
933
934 aspeed_smc_flash_do_select(fl, unselect);
935 }
936
937 static void aspeed_smc_reset(DeviceState *d)
938 {
939 AspeedSMCState *s = ASPEED_SMC(d);
940 int i;
941
942 memset(s->regs, 0, sizeof s->regs);
943
944 /* Unselect all slaves */
945 for (i = 0; i < s->num_cs; ++i) {
946 s->regs[s->r_ctrl0 + i] |= CTRL_CE_STOP_ACTIVE;
947 qemu_set_irq(s->cs_lines[i], true);
948 }
949
950 /* setup the default segment register values and regions for all */
951 for (i = 0; i < s->ctrl->max_slaves; ++i) {
952 aspeed_smc_flash_set_segment_region(s, i,
953 s->ctrl->segment_to_reg(s, &s->ctrl->segments[i]));
954 }
955
956 /* HW strapping flash type for the AST2600 controllers */
957 if (s->ctrl->segments == aspeed_segments_ast2600_fmc) {
958 /* flash type is fixed to SPI for all */
959 s->regs[s->r_conf] |= (CONF_FLASH_TYPE_SPI << CONF_FLASH_TYPE0);
960 s->regs[s->r_conf] |= (CONF_FLASH_TYPE_SPI << CONF_FLASH_TYPE1);
961 s->regs[s->r_conf] |= (CONF_FLASH_TYPE_SPI << CONF_FLASH_TYPE2);
962 }
963
964 /* HW strapping flash type for FMC controllers */
965 if (s->ctrl->segments == aspeed_segments_ast2500_fmc) {
966 /* flash type is fixed to SPI for CE0 and CE1 */
967 s->regs[s->r_conf] |= (CONF_FLASH_TYPE_SPI << CONF_FLASH_TYPE0);
968 s->regs[s->r_conf] |= (CONF_FLASH_TYPE_SPI << CONF_FLASH_TYPE1);
969 }
970
971 /* HW strapping for AST2400 FMC controllers (SCU70). Let's use the
972 * configuration of the palmetto-bmc machine */
973 if (s->ctrl->segments == aspeed_segments_fmc) {
974 s->regs[s->r_conf] |= (CONF_FLASH_TYPE_SPI << CONF_FLASH_TYPE0);
975 }
976
977 s->snoop_index = SNOOP_OFF;
978 s->snoop_dummies = 0;
979 }
980
981 static uint64_t aspeed_smc_read(void *opaque, hwaddr addr, unsigned int size)
982 {
983 AspeedSMCState *s = ASPEED_SMC(opaque);
984
985 addr >>= 2;
986
987 if (addr == s->r_conf ||
988 (addr >= s->r_timings &&
989 addr < s->r_timings + s->ctrl->nregs_timings) ||
990 addr == s->r_ce_ctrl ||
991 addr == R_INTR_CTRL ||
992 addr == R_DUMMY_DATA ||
993 (s->ctrl->has_dma && addr == R_DMA_CTRL) ||
994 (s->ctrl->has_dma && addr == R_DMA_FLASH_ADDR) ||
995 (s->ctrl->has_dma && addr == R_DMA_DRAM_ADDR) ||
996 (s->ctrl->has_dma && addr == R_DMA_LEN) ||
997 (s->ctrl->has_dma && addr == R_DMA_CHECKSUM) ||
998 (addr >= R_SEG_ADDR0 && addr < R_SEG_ADDR0 + s->ctrl->max_slaves) ||
999 (addr >= s->r_ctrl0 && addr < s->r_ctrl0 + s->ctrl->max_slaves)) {
1000
1001 trace_aspeed_smc_read(addr, size, s->regs[addr]);
1002
1003 return s->regs[addr];
1004 } else {
1005 qemu_log_mask(LOG_UNIMP, "%s: not implemented: 0x%" HWADDR_PRIx "\n",
1006 __func__, addr);
1007 return -1;
1008 }
1009 }
1010
1011 static uint8_t aspeed_smc_hclk_divisor(uint8_t hclk_mask)
1012 {
1013 /* HCLK/1 .. HCLK/16 */
1014 const uint8_t hclk_divisors[] = {
1015 15, 7, 14, 6, 13, 5, 12, 4, 11, 3, 10, 2, 9, 1, 8, 0
1016 };
1017 int i;
1018
1019 for (i = 0; i < ARRAY_SIZE(hclk_divisors); i++) {
1020 if (hclk_mask == hclk_divisors[i]) {
1021 return i + 1;
1022 }
1023 }
1024
1025 qemu_log_mask(LOG_GUEST_ERROR, "invalid HCLK mask %x", hclk_mask);
1026 return 0;
1027 }
1028
1029 /*
1030 * When doing calibration, the SPI clock rate in the CE0 Control
1031 * Register and the read delay cycles in the Read Timing Compensation
1032 * Register are set using bit[11:4] of the DMA Control Register.
1033 */
1034 static void aspeed_smc_dma_calibration(AspeedSMCState *s)
1035 {
1036 uint8_t delay =
1037 (s->regs[R_DMA_CTRL] >> DMA_CTRL_DELAY_SHIFT) & DMA_CTRL_DELAY_MASK;
1038 uint8_t hclk_mask =
1039 (s->regs[R_DMA_CTRL] >> DMA_CTRL_FREQ_SHIFT) & DMA_CTRL_FREQ_MASK;
1040 uint8_t hclk_div = aspeed_smc_hclk_divisor(hclk_mask);
1041 uint32_t hclk_shift = (hclk_div - 1) << 2;
1042 uint8_t cs;
1043
1044 /*
1045 * The Read Timing Compensation Register values apply to all CS on
1046 * the SPI bus and only HCLK/1 - HCLK/5 can have tunable delays
1047 */
1048 if (hclk_div && hclk_div < 6) {
1049 s->regs[s->r_timings] &= ~(0xf << hclk_shift);
1050 s->regs[s->r_timings] |= delay << hclk_shift;
1051 }
1052
1053 /*
1054 * TODO: compute the CS from the DMA address and the segment
1055 * registers. This is not really a problem for now because the
1056 * Timing Register values apply to all CS and software uses CS0 to
1057 * do calibration.
1058 */
1059 cs = 0;
1060 s->regs[s->r_ctrl0 + cs] &=
1061 ~(CE_CTRL_CLOCK_FREQ_MASK << CE_CTRL_CLOCK_FREQ_SHIFT);
1062 s->regs[s->r_ctrl0 + cs] |= CE_CTRL_CLOCK_FREQ(hclk_div);
1063 }
1064
1065 /*
1066 * Emulate read errors in the DMA Checksum Register for high
1067 * frequencies and optimistic settings of the Read Timing Compensation
1068 * Register. This will help in tuning the SPI timing calibration
1069 * algorithm.
1070 */
1071 static bool aspeed_smc_inject_read_failure(AspeedSMCState *s)
1072 {
1073 uint8_t delay =
1074 (s->regs[R_DMA_CTRL] >> DMA_CTRL_DELAY_SHIFT) & DMA_CTRL_DELAY_MASK;
1075 uint8_t hclk_mask =
1076 (s->regs[R_DMA_CTRL] >> DMA_CTRL_FREQ_SHIFT) & DMA_CTRL_FREQ_MASK;
1077
1078 /*
1079 * Typical values of a palmetto-bmc machine.
1080 */
1081 switch (aspeed_smc_hclk_divisor(hclk_mask)) {
1082 case 4 ... 16:
1083 return false;
1084 case 3: /* at least one HCLK cycle delay */
1085 return (delay & 0x7) < 1;
1086 case 2: /* at least two HCLK cycle delay */
1087 return (delay & 0x7) < 2;
1088 case 1: /* (> 100MHz) is above the max freq of the controller */
1089 return true;
1090 default:
1091 g_assert_not_reached();
1092 }
1093 }
1094
1095 /*
1096 * Accumulate the result of the reads to provide a checksum that will
1097 * be used to validate the read timing settings.
1098 */
1099 static void aspeed_smc_dma_checksum(AspeedSMCState *s)
1100 {
1101 MemTxResult result;
1102 uint32_t data;
1103
1104 if (s->regs[R_DMA_CTRL] & DMA_CTRL_WRITE) {
1105 qemu_log_mask(LOG_GUEST_ERROR,
1106 "%s: invalid direction for DMA checksum\n", __func__);
1107 return;
1108 }
1109
1110 if (s->regs[R_DMA_CTRL] & DMA_CTRL_CALIB) {
1111 aspeed_smc_dma_calibration(s);
1112 }
1113
1114 while (s->regs[R_DMA_LEN]) {
1115 data = address_space_ldl_le(&s->flash_as, s->regs[R_DMA_FLASH_ADDR],
1116 MEMTXATTRS_UNSPECIFIED, &result);
1117 if (result != MEMTX_OK) {
1118 qemu_log_mask(LOG_GUEST_ERROR, "%s: Flash read failed @%08x\n",
1119 __func__, s->regs[R_DMA_FLASH_ADDR]);
1120 return;
1121 }
1122 trace_aspeed_smc_dma_checksum(s->regs[R_DMA_FLASH_ADDR], data);
1123
1124 /*
1125 * When the DMA is on-going, the DMA registers are updated
1126 * with the current working addresses and length.
1127 */
1128 s->regs[R_DMA_CHECKSUM] += data;
1129 s->regs[R_DMA_FLASH_ADDR] += 4;
1130 s->regs[R_DMA_LEN] -= 4;
1131 }
1132
1133 if (s->inject_failure && aspeed_smc_inject_read_failure(s)) {
1134 s->regs[R_DMA_CHECKSUM] = 0xbadc0de;
1135 }
1136
1137 }
1138
1139 static void aspeed_smc_dma_rw(AspeedSMCState *s)
1140 {
1141 MemTxResult result;
1142 uint32_t data;
1143
1144 trace_aspeed_smc_dma_rw(s->regs[R_DMA_CTRL] & DMA_CTRL_WRITE ?
1145 "write" : "read",
1146 s->regs[R_DMA_FLASH_ADDR],
1147 s->regs[R_DMA_DRAM_ADDR],
1148 s->regs[R_DMA_LEN]);
1149 while (s->regs[R_DMA_LEN]) {
1150 if (s->regs[R_DMA_CTRL] & DMA_CTRL_WRITE) {
1151 data = address_space_ldl_le(&s->dram_as, s->regs[R_DMA_DRAM_ADDR],
1152 MEMTXATTRS_UNSPECIFIED, &result);
1153 if (result != MEMTX_OK) {
1154 qemu_log_mask(LOG_GUEST_ERROR, "%s: DRAM read failed @%08x\n",
1155 __func__, s->regs[R_DMA_DRAM_ADDR]);
1156 return;
1157 }
1158
1159 address_space_stl_le(&s->flash_as, s->regs[R_DMA_FLASH_ADDR],
1160 data, MEMTXATTRS_UNSPECIFIED, &result);
1161 if (result != MEMTX_OK) {
1162 qemu_log_mask(LOG_GUEST_ERROR, "%s: Flash write failed @%08x\n",
1163 __func__, s->regs[R_DMA_FLASH_ADDR]);
1164 return;
1165 }
1166 } else {
1167 data = address_space_ldl_le(&s->flash_as, s->regs[R_DMA_FLASH_ADDR],
1168 MEMTXATTRS_UNSPECIFIED, &result);
1169 if (result != MEMTX_OK) {
1170 qemu_log_mask(LOG_GUEST_ERROR, "%s: Flash read failed @%08x\n",
1171 __func__, s->regs[R_DMA_FLASH_ADDR]);
1172 return;
1173 }
1174
1175 address_space_stl_le(&s->dram_as, s->regs[R_DMA_DRAM_ADDR],
1176 data, MEMTXATTRS_UNSPECIFIED, &result);
1177 if (result != MEMTX_OK) {
1178 qemu_log_mask(LOG_GUEST_ERROR, "%s: DRAM write failed @%08x\n",
1179 __func__, s->regs[R_DMA_DRAM_ADDR]);
1180 return;
1181 }
1182 }
1183
1184 /*
1185 * When the DMA is on-going, the DMA registers are updated
1186 * with the current working addresses and length.
1187 */
1188 s->regs[R_DMA_FLASH_ADDR] += 4;
1189 s->regs[R_DMA_DRAM_ADDR] += 4;
1190 s->regs[R_DMA_LEN] -= 4;
1191 s->regs[R_DMA_CHECKSUM] += data;
1192 }
1193 }
1194
1195 static void aspeed_smc_dma_stop(AspeedSMCState *s)
1196 {
1197 /*
1198 * When the DMA is disabled, INTR_CTRL_DMA_STATUS=0 means the
1199 * engine is idle
1200 */
1201 s->regs[R_INTR_CTRL] &= ~INTR_CTRL_DMA_STATUS;
1202 s->regs[R_DMA_CHECKSUM] = 0;
1203
1204 /*
1205 * Lower the DMA irq in any case. The IRQ control register could
1206 * have been cleared before disabling the DMA.
1207 */
1208 qemu_irq_lower(s->irq);
1209 }
1210
1211 /*
1212 * When INTR_CTRL_DMA_STATUS=1, the DMA has completed and a new DMA
1213 * can start even if the result of the previous was not collected.
1214 */
1215 static bool aspeed_smc_dma_in_progress(AspeedSMCState *s)
1216 {
1217 return s->regs[R_DMA_CTRL] & DMA_CTRL_ENABLE &&
1218 !(s->regs[R_INTR_CTRL] & INTR_CTRL_DMA_STATUS);
1219 }
1220
1221 static void aspeed_smc_dma_done(AspeedSMCState *s)
1222 {
1223 s->regs[R_INTR_CTRL] |= INTR_CTRL_DMA_STATUS;
1224 if (s->regs[R_INTR_CTRL] & INTR_CTRL_DMA_EN) {
1225 qemu_irq_raise(s->irq);
1226 }
1227 }
1228
1229 static void aspeed_smc_dma_ctrl(AspeedSMCState *s, uint64_t dma_ctrl)
1230 {
1231 if (!(dma_ctrl & DMA_CTRL_ENABLE)) {
1232 s->regs[R_DMA_CTRL] = dma_ctrl;
1233
1234 aspeed_smc_dma_stop(s);
1235 return;
1236 }
1237
1238 if (aspeed_smc_dma_in_progress(s)) {
1239 qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA in progress\n", __func__);
1240 return;
1241 }
1242
1243 s->regs[R_DMA_CTRL] = dma_ctrl;
1244
1245 if (s->regs[R_DMA_CTRL] & DMA_CTRL_CKSUM) {
1246 aspeed_smc_dma_checksum(s);
1247 } else {
1248 aspeed_smc_dma_rw(s);
1249 }
1250
1251 aspeed_smc_dma_done(s);
1252 }
1253
1254 static void aspeed_smc_write(void *opaque, hwaddr addr, uint64_t data,
1255 unsigned int size)
1256 {
1257 AspeedSMCState *s = ASPEED_SMC(opaque);
1258 uint32_t value = data;
1259
1260 addr >>= 2;
1261
1262 trace_aspeed_smc_write(addr, size, data);
1263
1264 if (addr == s->r_conf ||
1265 (addr >= s->r_timings &&
1266 addr < s->r_timings + s->ctrl->nregs_timings) ||
1267 addr == s->r_ce_ctrl) {
1268 s->regs[addr] = value;
1269 } else if (addr >= s->r_ctrl0 && addr < s->r_ctrl0 + s->num_cs) {
1270 int cs = addr - s->r_ctrl0;
1271 aspeed_smc_flash_update_ctrl(&s->flashes[cs], value);
1272 } else if (addr >= R_SEG_ADDR0 &&
1273 addr < R_SEG_ADDR0 + s->ctrl->max_slaves) {
1274 int cs = addr - R_SEG_ADDR0;
1275
1276 if (value != s->regs[R_SEG_ADDR0 + cs]) {
1277 aspeed_smc_flash_set_segment(s, cs, value);
1278 }
1279 } else if (addr == R_DUMMY_DATA) {
1280 s->regs[addr] = value & 0xff;
1281 } else if (addr == R_INTR_CTRL) {
1282 s->regs[addr] = value;
1283 } else if (s->ctrl->has_dma && addr == R_DMA_CTRL) {
1284 aspeed_smc_dma_ctrl(s, value);
1285 } else if (s->ctrl->has_dma && addr == R_DMA_DRAM_ADDR) {
1286 s->regs[addr] = DMA_DRAM_ADDR(s, value);
1287 } else if (s->ctrl->has_dma && addr == R_DMA_FLASH_ADDR) {
1288 s->regs[addr] = DMA_FLASH_ADDR(s, value);
1289 } else if (s->ctrl->has_dma && addr == R_DMA_LEN) {
1290 s->regs[addr] = DMA_LENGTH(value);
1291 } else {
1292 qemu_log_mask(LOG_UNIMP, "%s: not implemented: 0x%" HWADDR_PRIx "\n",
1293 __func__, addr);
1294 return;
1295 }
1296 }
1297
1298 static const MemoryRegionOps aspeed_smc_ops = {
1299 .read = aspeed_smc_read,
1300 .write = aspeed_smc_write,
1301 .endianness = DEVICE_LITTLE_ENDIAN,
1302 .valid.unaligned = true,
1303 };
1304
1305
1306 /*
1307 * Initialize the custom address spaces for DMAs
1308 */
1309 static void aspeed_smc_dma_setup(AspeedSMCState *s, Error **errp)
1310 {
1311 char *name;
1312
1313 if (!s->dram_mr) {
1314 error_setg(errp, TYPE_ASPEED_SMC ": 'dram' link not set");
1315 return;
1316 }
1317
1318 name = g_strdup_printf("%s-dma-flash", s->ctrl->name);
1319 address_space_init(&s->flash_as, &s->mmio_flash, name);
1320 g_free(name);
1321
1322 name = g_strdup_printf("%s-dma-dram", s->ctrl->name);
1323 address_space_init(&s->dram_as, s->dram_mr, name);
1324 g_free(name);
1325 }
1326
1327 static void aspeed_smc_realize(DeviceState *dev, Error **errp)
1328 {
1329 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
1330 AspeedSMCState *s = ASPEED_SMC(dev);
1331 AspeedSMCClass *mc = ASPEED_SMC_GET_CLASS(s);
1332 int i;
1333 char name[32];
1334 hwaddr offset = 0;
1335
1336 s->ctrl = mc->ctrl;
1337
1338 /* keep a copy under AspeedSMCState to speed up accesses */
1339 s->r_conf = s->ctrl->r_conf;
1340 s->r_ce_ctrl = s->ctrl->r_ce_ctrl;
1341 s->r_ctrl0 = s->ctrl->r_ctrl0;
1342 s->r_timings = s->ctrl->r_timings;
1343 s->conf_enable_w0 = s->ctrl->conf_enable_w0;
1344
1345 /* Enforce some real HW limits */
1346 if (s->num_cs > s->ctrl->max_slaves) {
1347 qemu_log_mask(LOG_GUEST_ERROR, "%s: num_cs cannot exceed: %d\n",
1348 __func__, s->ctrl->max_slaves);
1349 s->num_cs = s->ctrl->max_slaves;
1350 }
1351
1352 /* DMA irq. Keep it first for the initialization in the SoC */
1353 sysbus_init_irq(sbd, &s->irq);
1354
1355 s->spi = ssi_create_bus(dev, "spi");
1356
1357 /* Setup cs_lines for slaves */
1358 s->cs_lines = g_new0(qemu_irq, s->num_cs);
1359
1360 for (i = 0; i < s->num_cs; ++i) {
1361 sysbus_init_irq(sbd, &s->cs_lines[i]);
1362 }
1363
1364 /* The memory region for the controller registers */
1365 memory_region_init_io(&s->mmio, OBJECT(s), &aspeed_smc_ops, s,
1366 s->ctrl->name, s->ctrl->nregs * 4);
1367 sysbus_init_mmio(sbd, &s->mmio);
1368
1369 /*
1370 * The container memory region representing the address space
1371 * window in which the flash modules are mapped. The size and
1372 * address depends on the SoC model and controller type.
1373 */
1374 snprintf(name, sizeof(name), "%s.flash", s->ctrl->name);
1375
1376 memory_region_init_io(&s->mmio_flash, OBJECT(s),
1377 &aspeed_smc_flash_default_ops, s, name,
1378 s->ctrl->flash_window_size);
1379 sysbus_init_mmio(sbd, &s->mmio_flash);
1380
1381 s->flashes = g_new0(AspeedSMCFlash, s->ctrl->max_slaves);
1382
1383 /*
1384 * Let's create a sub memory region for each possible slave. All
1385 * have a configurable memory segment in the overall flash mapping
1386 * window of the controller but, there is not necessarily a flash
1387 * module behind to handle the memory accesses. This depends on
1388 * the board configuration.
1389 */
1390 for (i = 0; i < s->ctrl->max_slaves; ++i) {
1391 AspeedSMCFlash *fl = &s->flashes[i];
1392
1393 snprintf(name, sizeof(name), "%s.%d", s->ctrl->name, i);
1394
1395 fl->id = i;
1396 fl->controller = s;
1397 fl->size = s->ctrl->segments[i].size;
1398 memory_region_init_io(&fl->mmio, OBJECT(s), &aspeed_smc_flash_ops,
1399 fl, name, fl->size);
1400 memory_region_add_subregion(&s->mmio_flash, offset, &fl->mmio);
1401 offset += fl->size;
1402 }
1403
1404 /* DMA support */
1405 if (s->ctrl->has_dma) {
1406 aspeed_smc_dma_setup(s, errp);
1407 }
1408 }
1409
1410 static const VMStateDescription vmstate_aspeed_smc = {
1411 .name = "aspeed.smc",
1412 .version_id = 2,
1413 .minimum_version_id = 2,
1414 .fields = (VMStateField[]) {
1415 VMSTATE_UINT32_ARRAY(regs, AspeedSMCState, ASPEED_SMC_R_MAX),
1416 VMSTATE_UINT8(snoop_index, AspeedSMCState),
1417 VMSTATE_UINT8(snoop_dummies, AspeedSMCState),
1418 VMSTATE_END_OF_LIST()
1419 }
1420 };
1421
1422 static Property aspeed_smc_properties[] = {
1423 DEFINE_PROP_UINT32("num-cs", AspeedSMCState, num_cs, 1),
1424 DEFINE_PROP_BOOL("inject-failure", AspeedSMCState, inject_failure, false),
1425 DEFINE_PROP_UINT64("sdram-base", AspeedSMCState, sdram_base, 0),
1426 DEFINE_PROP_LINK("dram", AspeedSMCState, dram_mr,
1427 TYPE_MEMORY_REGION, MemoryRegion *),
1428 DEFINE_PROP_END_OF_LIST(),
1429 };
1430
1431 static void aspeed_smc_class_init(ObjectClass *klass, void *data)
1432 {
1433 DeviceClass *dc = DEVICE_CLASS(klass);
1434 AspeedSMCClass *mc = ASPEED_SMC_CLASS(klass);
1435
1436 dc->realize = aspeed_smc_realize;
1437 dc->reset = aspeed_smc_reset;
1438 device_class_set_props(dc, aspeed_smc_properties);
1439 dc->vmsd = &vmstate_aspeed_smc;
1440 mc->ctrl = data;
1441 }
1442
1443 static const TypeInfo aspeed_smc_info = {
1444 .name = TYPE_ASPEED_SMC,
1445 .parent = TYPE_SYS_BUS_DEVICE,
1446 .instance_size = sizeof(AspeedSMCState),
1447 .class_size = sizeof(AspeedSMCClass),
1448 .abstract = true,
1449 };
1450
1451 static void aspeed_smc_register_types(void)
1452 {
1453 int i;
1454
1455 type_register_static(&aspeed_smc_info);
1456 for (i = 0; i < ARRAY_SIZE(controllers); ++i) {
1457 TypeInfo ti = {
1458 .name = controllers[i].name,
1459 .parent = TYPE_ASPEED_SMC,
1460 .class_init = aspeed_smc_class_init,
1461 .class_data = (void *)&controllers[i],
1462 };
1463 type_register(&ti);
1464 }
1465 }
1466
1467 type_init(aspeed_smc_register_types)
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