Commit | Line | Data |
---|---|---|
5c05dd07 YS |
1 | /* |
2 | * SH SPI bus driver | |
3 | * | |
4 | * Copyright (C) 2011 Renesas Solutions Corp. | |
5 | * | |
6 | * Based on pxa2xx_spi.c: | |
7 | * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; version 2 of the License. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/timer.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/list.h> | |
31 | #include <linux/workqueue.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/platform_device.h> | |
34 | #include <linux/io.h> | |
35 | #include <linux/spi/spi.h> | |
36 | ||
37 | #define SPI_SH_TBR 0x00 | |
38 | #define SPI_SH_RBR 0x00 | |
39 | #define SPI_SH_CR1 0x08 | |
40 | #define SPI_SH_CR2 0x10 | |
41 | #define SPI_SH_CR3 0x18 | |
42 | #define SPI_SH_CR4 0x20 | |
43 | #define SPI_SH_CR5 0x28 | |
44 | ||
45 | /* CR1 */ | |
46 | #define SPI_SH_TBE 0x80 | |
47 | #define SPI_SH_TBF 0x40 | |
48 | #define SPI_SH_RBE 0x20 | |
49 | #define SPI_SH_RBF 0x10 | |
50 | #define SPI_SH_PFONRD 0x08 | |
51 | #define SPI_SH_SSDB 0x04 | |
52 | #define SPI_SH_SSD 0x02 | |
53 | #define SPI_SH_SSA 0x01 | |
54 | ||
55 | /* CR2 */ | |
56 | #define SPI_SH_RSTF 0x80 | |
57 | #define SPI_SH_LOOPBK 0x40 | |
58 | #define SPI_SH_CPOL 0x20 | |
59 | #define SPI_SH_CPHA 0x10 | |
60 | #define SPI_SH_L1M0 0x08 | |
61 | ||
62 | /* CR3 */ | |
63 | #define SPI_SH_MAX_BYTE 0xFF | |
64 | ||
65 | /* CR4 */ | |
66 | #define SPI_SH_TBEI 0x80 | |
67 | #define SPI_SH_TBFI 0x40 | |
68 | #define SPI_SH_RBEI 0x20 | |
69 | #define SPI_SH_RBFI 0x10 | |
70 | #define SPI_SH_WPABRT 0x04 | |
71 | #define SPI_SH_SSS 0x01 | |
72 | ||
73 | /* CR8 */ | |
74 | #define SPI_SH_P1L0 0x80 | |
75 | #define SPI_SH_PP1L0 0x40 | |
76 | #define SPI_SH_MUXI 0x20 | |
77 | #define SPI_SH_MUXIRQ 0x10 | |
78 | ||
79 | #define SPI_SH_FIFO_SIZE 32 | |
80 | #define SPI_SH_SEND_TIMEOUT (3 * HZ) | |
81 | #define SPI_SH_RECEIVE_TIMEOUT (HZ >> 3) | |
82 | ||
83 | #undef DEBUG | |
84 | ||
85 | struct spi_sh_data { | |
86 | void __iomem *addr; | |
87 | int irq; | |
88 | struct spi_master *master; | |
89 | struct list_head queue; | |
90 | struct workqueue_struct *workqueue; | |
91 | struct work_struct ws; | |
92 | unsigned long cr1; | |
93 | wait_queue_head_t wait; | |
94 | spinlock_t lock; | |
0eb8880f | 95 | int width; |
5c05dd07 YS |
96 | }; |
97 | ||
98 | static void spi_sh_write(struct spi_sh_data *ss, unsigned long data, | |
99 | unsigned long offset) | |
100 | { | |
0eb8880f SY |
101 | if (ss->width == 8) |
102 | iowrite8(data, ss->addr + (offset >> 2)); | |
103 | else if (ss->width == 32) | |
104 | iowrite32(data, ss->addr + offset); | |
5c05dd07 YS |
105 | } |
106 | ||
107 | static unsigned long spi_sh_read(struct spi_sh_data *ss, unsigned long offset) | |
108 | { | |
0eb8880f SY |
109 | if (ss->width == 8) |
110 | return ioread8(ss->addr + (offset >> 2)); | |
111 | else if (ss->width == 32) | |
112 | return ioread32(ss->addr + offset); | |
113 | else | |
114 | return 0; | |
5c05dd07 YS |
115 | } |
116 | ||
117 | static void spi_sh_set_bit(struct spi_sh_data *ss, unsigned long val, | |
118 | unsigned long offset) | |
119 | { | |
120 | unsigned long tmp; | |
121 | ||
122 | tmp = spi_sh_read(ss, offset); | |
123 | tmp |= val; | |
124 | spi_sh_write(ss, tmp, offset); | |
125 | } | |
126 | ||
127 | static void spi_sh_clear_bit(struct spi_sh_data *ss, unsigned long val, | |
128 | unsigned long offset) | |
129 | { | |
130 | unsigned long tmp; | |
131 | ||
132 | tmp = spi_sh_read(ss, offset); | |
133 | tmp &= ~val; | |
134 | spi_sh_write(ss, tmp, offset); | |
135 | } | |
136 | ||
137 | static void clear_fifo(struct spi_sh_data *ss) | |
138 | { | |
139 | spi_sh_set_bit(ss, SPI_SH_RSTF, SPI_SH_CR2); | |
140 | spi_sh_clear_bit(ss, SPI_SH_RSTF, SPI_SH_CR2); | |
141 | } | |
142 | ||
143 | static int spi_sh_wait_receive_buffer(struct spi_sh_data *ss) | |
144 | { | |
145 | int timeout = 100000; | |
146 | ||
147 | while (spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) { | |
148 | udelay(10); | |
149 | if (timeout-- < 0) | |
150 | return -ETIMEDOUT; | |
151 | } | |
152 | return 0; | |
153 | } | |
154 | ||
155 | static int spi_sh_wait_write_buffer_empty(struct spi_sh_data *ss) | |
156 | { | |
157 | int timeout = 100000; | |
158 | ||
159 | while (!(spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_TBE)) { | |
160 | udelay(10); | |
161 | if (timeout-- < 0) | |
162 | return -ETIMEDOUT; | |
163 | } | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static int spi_sh_send(struct spi_sh_data *ss, struct spi_message *mesg, | |
168 | struct spi_transfer *t) | |
169 | { | |
170 | int i, retval = 0; | |
171 | int remain = t->len; | |
172 | int cur_len; | |
173 | unsigned char *data; | |
174 | unsigned long tmp; | |
175 | long ret; | |
176 | ||
177 | if (t->len) | |
178 | spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1); | |
179 | ||
180 | data = (unsigned char *)t->tx_buf; | |
181 | while (remain > 0) { | |
182 | cur_len = min(SPI_SH_FIFO_SIZE, remain); | |
183 | for (i = 0; i < cur_len && | |
184 | !(spi_sh_read(ss, SPI_SH_CR4) & | |
185 | SPI_SH_WPABRT) && | |
186 | !(spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_TBF); | |
187 | i++) | |
188 | spi_sh_write(ss, (unsigned long)data[i], SPI_SH_TBR); | |
189 | ||
190 | if (spi_sh_read(ss, SPI_SH_CR4) & SPI_SH_WPABRT) { | |
191 | /* Abort SPI operation */ | |
192 | spi_sh_set_bit(ss, SPI_SH_WPABRT, SPI_SH_CR4); | |
193 | retval = -EIO; | |
194 | break; | |
195 | } | |
196 | ||
197 | cur_len = i; | |
198 | ||
199 | remain -= cur_len; | |
200 | data += cur_len; | |
201 | ||
202 | if (remain > 0) { | |
203 | ss->cr1 &= ~SPI_SH_TBE; | |
204 | spi_sh_set_bit(ss, SPI_SH_TBE, SPI_SH_CR4); | |
205 | ret = wait_event_interruptible_timeout(ss->wait, | |
206 | ss->cr1 & SPI_SH_TBE, | |
207 | SPI_SH_SEND_TIMEOUT); | |
208 | if (ret == 0 && !(ss->cr1 & SPI_SH_TBE)) { | |
209 | printk(KERN_ERR "%s: timeout\n", __func__); | |
210 | return -ETIMEDOUT; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
215 | if (list_is_last(&t->transfer_list, &mesg->transfers)) { | |
216 | tmp = spi_sh_read(ss, SPI_SH_CR1); | |
217 | tmp = tmp & ~(SPI_SH_SSD | SPI_SH_SSDB); | |
218 | spi_sh_write(ss, tmp, SPI_SH_CR1); | |
219 | spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1); | |
220 | ||
221 | ss->cr1 &= ~SPI_SH_TBE; | |
222 | spi_sh_set_bit(ss, SPI_SH_TBE, SPI_SH_CR4); | |
223 | ret = wait_event_interruptible_timeout(ss->wait, | |
224 | ss->cr1 & SPI_SH_TBE, | |
225 | SPI_SH_SEND_TIMEOUT); | |
226 | if (ret == 0 && (ss->cr1 & SPI_SH_TBE)) { | |
227 | printk(KERN_ERR "%s: timeout\n", __func__); | |
228 | return -ETIMEDOUT; | |
229 | } | |
230 | } | |
231 | ||
232 | return retval; | |
233 | } | |
234 | ||
235 | static int spi_sh_receive(struct spi_sh_data *ss, struct spi_message *mesg, | |
236 | struct spi_transfer *t) | |
237 | { | |
238 | int i; | |
239 | int remain = t->len; | |
240 | int cur_len; | |
241 | unsigned char *data; | |
242 | unsigned long tmp; | |
243 | long ret; | |
244 | ||
245 | if (t->len > SPI_SH_MAX_BYTE) | |
246 | spi_sh_write(ss, SPI_SH_MAX_BYTE, SPI_SH_CR3); | |
247 | else | |
248 | spi_sh_write(ss, t->len, SPI_SH_CR3); | |
249 | ||
250 | tmp = spi_sh_read(ss, SPI_SH_CR1); | |
251 | tmp = tmp & ~(SPI_SH_SSD | SPI_SH_SSDB); | |
252 | spi_sh_write(ss, tmp, SPI_SH_CR1); | |
253 | spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1); | |
254 | ||
255 | spi_sh_wait_write_buffer_empty(ss); | |
256 | ||
257 | data = (unsigned char *)t->rx_buf; | |
258 | while (remain > 0) { | |
259 | if (remain >= SPI_SH_FIFO_SIZE) { | |
260 | ss->cr1 &= ~SPI_SH_RBF; | |
261 | spi_sh_set_bit(ss, SPI_SH_RBF, SPI_SH_CR4); | |
262 | ret = wait_event_interruptible_timeout(ss->wait, | |
263 | ss->cr1 & SPI_SH_RBF, | |
264 | SPI_SH_RECEIVE_TIMEOUT); | |
265 | if (ret == 0 && | |
266 | spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) { | |
267 | printk(KERN_ERR "%s: timeout\n", __func__); | |
268 | return -ETIMEDOUT; | |
269 | } | |
270 | } | |
271 | ||
272 | cur_len = min(SPI_SH_FIFO_SIZE, remain); | |
273 | for (i = 0; i < cur_len; i++) { | |
274 | if (spi_sh_wait_receive_buffer(ss)) | |
275 | break; | |
276 | data[i] = (unsigned char)spi_sh_read(ss, SPI_SH_RBR); | |
277 | } | |
278 | ||
279 | remain -= cur_len; | |
280 | data += cur_len; | |
281 | } | |
282 | ||
283 | /* deassert CS when SPI is receiving. */ | |
284 | if (t->len > SPI_SH_MAX_BYTE) { | |
285 | clear_fifo(ss); | |
286 | spi_sh_write(ss, 1, SPI_SH_CR3); | |
287 | } else { | |
288 | spi_sh_write(ss, 0, SPI_SH_CR3); | |
289 | } | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | static void spi_sh_work(struct work_struct *work) | |
295 | { | |
296 | struct spi_sh_data *ss = container_of(work, struct spi_sh_data, ws); | |
297 | struct spi_message *mesg; | |
298 | struct spi_transfer *t; | |
299 | unsigned long flags; | |
300 | int ret; | |
301 | ||
302 | pr_debug("%s: enter\n", __func__); | |
303 | ||
304 | spin_lock_irqsave(&ss->lock, flags); | |
305 | while (!list_empty(&ss->queue)) { | |
306 | mesg = list_entry(ss->queue.next, struct spi_message, queue); | |
307 | list_del_init(&mesg->queue); | |
308 | ||
309 | spin_unlock_irqrestore(&ss->lock, flags); | |
310 | list_for_each_entry(t, &mesg->transfers, transfer_list) { | |
311 | pr_debug("tx_buf = %p, rx_buf = %p\n", | |
312 | t->tx_buf, t->rx_buf); | |
313 | pr_debug("len = %d, delay_usecs = %d\n", | |
314 | t->len, t->delay_usecs); | |
315 | ||
316 | if (t->tx_buf) { | |
317 | ret = spi_sh_send(ss, mesg, t); | |
318 | if (ret < 0) | |
319 | goto error; | |
320 | } | |
321 | if (t->rx_buf) { | |
322 | ret = spi_sh_receive(ss, mesg, t); | |
323 | if (ret < 0) | |
324 | goto error; | |
325 | } | |
326 | mesg->actual_length += t->len; | |
327 | } | |
328 | spin_lock_irqsave(&ss->lock, flags); | |
329 | ||
330 | mesg->status = 0; | |
331 | mesg->complete(mesg->context); | |
332 | } | |
333 | ||
334 | clear_fifo(ss); | |
335 | spi_sh_set_bit(ss, SPI_SH_SSD, SPI_SH_CR1); | |
336 | udelay(100); | |
337 | ||
338 | spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD, | |
339 | SPI_SH_CR1); | |
340 | ||
341 | clear_fifo(ss); | |
342 | ||
343 | spin_unlock_irqrestore(&ss->lock, flags); | |
344 | ||
345 | return; | |
346 | ||
347 | error: | |
348 | mesg->status = ret; | |
349 | mesg->complete(mesg->context); | |
350 | ||
351 | spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD, | |
352 | SPI_SH_CR1); | |
353 | clear_fifo(ss); | |
354 | ||
355 | } | |
356 | ||
357 | static int spi_sh_setup(struct spi_device *spi) | |
358 | { | |
359 | struct spi_sh_data *ss = spi_master_get_devdata(spi->master); | |
360 | ||
361 | if (!spi->bits_per_word) | |
362 | spi->bits_per_word = 8; | |
363 | ||
364 | pr_debug("%s: enter\n", __func__); | |
365 | ||
366 | spi_sh_write(ss, 0xfe, SPI_SH_CR1); /* SPI sycle stop */ | |
367 | spi_sh_write(ss, 0x00, SPI_SH_CR1); /* CR1 init */ | |
368 | spi_sh_write(ss, 0x00, SPI_SH_CR3); /* CR3 init */ | |
369 | ||
370 | clear_fifo(ss); | |
371 | ||
372 | /* 1/8 clock */ | |
373 | spi_sh_write(ss, spi_sh_read(ss, SPI_SH_CR2) | 0x07, SPI_SH_CR2); | |
374 | udelay(10); | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static int spi_sh_transfer(struct spi_device *spi, struct spi_message *mesg) | |
380 | { | |
381 | struct spi_sh_data *ss = spi_master_get_devdata(spi->master); | |
382 | unsigned long flags; | |
383 | ||
384 | pr_debug("%s: enter\n", __func__); | |
385 | pr_debug("\tmode = %02x\n", spi->mode); | |
386 | ||
387 | spin_lock_irqsave(&ss->lock, flags); | |
388 | ||
389 | mesg->actual_length = 0; | |
390 | mesg->status = -EINPROGRESS; | |
391 | ||
392 | spi_sh_clear_bit(ss, SPI_SH_SSA, SPI_SH_CR1); | |
393 | ||
394 | list_add_tail(&mesg->queue, &ss->queue); | |
395 | queue_work(ss->workqueue, &ss->ws); | |
396 | ||
397 | spin_unlock_irqrestore(&ss->lock, flags); | |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
402 | static void spi_sh_cleanup(struct spi_device *spi) | |
403 | { | |
404 | struct spi_sh_data *ss = spi_master_get_devdata(spi->master); | |
405 | ||
406 | pr_debug("%s: enter\n", __func__); | |
407 | ||
408 | spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD, | |
409 | SPI_SH_CR1); | |
410 | } | |
411 | ||
412 | static irqreturn_t spi_sh_irq(int irq, void *_ss) | |
413 | { | |
414 | struct spi_sh_data *ss = (struct spi_sh_data *)_ss; | |
415 | unsigned long cr1; | |
416 | ||
417 | cr1 = spi_sh_read(ss, SPI_SH_CR1); | |
418 | if (cr1 & SPI_SH_TBE) | |
419 | ss->cr1 |= SPI_SH_TBE; | |
420 | if (cr1 & SPI_SH_TBF) | |
421 | ss->cr1 |= SPI_SH_TBF; | |
422 | if (cr1 & SPI_SH_RBE) | |
423 | ss->cr1 |= SPI_SH_RBE; | |
424 | if (cr1 & SPI_SH_RBF) | |
425 | ss->cr1 |= SPI_SH_RBF; | |
426 | ||
427 | if (ss->cr1) { | |
428 | spi_sh_clear_bit(ss, ss->cr1, SPI_SH_CR4); | |
429 | wake_up(&ss->wait); | |
430 | } | |
431 | ||
432 | return IRQ_HANDLED; | |
433 | } | |
434 | ||
fd4a319b | 435 | static int spi_sh_remove(struct platform_device *pdev) |
5c05dd07 | 436 | { |
24b5a82c | 437 | struct spi_sh_data *ss = platform_get_drvdata(pdev); |
5c05dd07 | 438 | |
680c1305 | 439 | spi_unregister_master(ss->master); |
5c05dd07 YS |
440 | destroy_workqueue(ss->workqueue); |
441 | free_irq(ss->irq, ss); | |
442 | iounmap(ss->addr); | |
5c05dd07 YS |
443 | |
444 | return 0; | |
445 | } | |
446 | ||
fd4a319b | 447 | static int spi_sh_probe(struct platform_device *pdev) |
5c05dd07 YS |
448 | { |
449 | struct resource *res; | |
450 | struct spi_master *master; | |
451 | struct spi_sh_data *ss; | |
452 | int ret, irq; | |
453 | ||
454 | /* get base addr */ | |
455 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
456 | if (unlikely(res == NULL)) { | |
457 | dev_err(&pdev->dev, "invalid resource\n"); | |
458 | return -EINVAL; | |
459 | } | |
460 | ||
461 | irq = platform_get_irq(pdev, 0); | |
462 | if (irq < 0) { | |
463 | dev_err(&pdev->dev, "platform_get_irq error\n"); | |
464 | return -ENODEV; | |
465 | } | |
466 | ||
467 | master = spi_alloc_master(&pdev->dev, sizeof(struct spi_sh_data)); | |
468 | if (master == NULL) { | |
469 | dev_err(&pdev->dev, "spi_alloc_master error.\n"); | |
470 | return -ENOMEM; | |
471 | } | |
472 | ||
473 | ss = spi_master_get_devdata(master); | |
24b5a82c | 474 | platform_set_drvdata(pdev, ss); |
5c05dd07 | 475 | |
0eb8880f SY |
476 | switch (res->flags & IORESOURCE_MEM_TYPE_MASK) { |
477 | case IORESOURCE_MEM_8BIT: | |
478 | ss->width = 8; | |
479 | break; | |
480 | case IORESOURCE_MEM_32BIT: | |
481 | ss->width = 32; | |
482 | break; | |
483 | default: | |
484 | dev_err(&pdev->dev, "No support width\n"); | |
485 | ret = -ENODEV; | |
486 | goto error1; | |
487 | } | |
5c05dd07 YS |
488 | ss->irq = irq; |
489 | ss->master = master; | |
490 | ss->addr = ioremap(res->start, resource_size(res)); | |
491 | if (ss->addr == NULL) { | |
492 | dev_err(&pdev->dev, "ioremap error.\n"); | |
493 | ret = -ENOMEM; | |
494 | goto error1; | |
495 | } | |
496 | INIT_LIST_HEAD(&ss->queue); | |
497 | spin_lock_init(&ss->lock); | |
498 | INIT_WORK(&ss->ws, spi_sh_work); | |
499 | init_waitqueue_head(&ss->wait); | |
500 | ss->workqueue = create_singlethread_workqueue( | |
501 | dev_name(master->dev.parent)); | |
502 | if (ss->workqueue == NULL) { | |
503 | dev_err(&pdev->dev, "create workqueue error\n"); | |
504 | ret = -EBUSY; | |
505 | goto error2; | |
506 | } | |
507 | ||
38ada214 | 508 | ret = request_irq(irq, spi_sh_irq, 0, "spi_sh", ss); |
5c05dd07 YS |
509 | if (ret < 0) { |
510 | dev_err(&pdev->dev, "request_irq error\n"); | |
511 | goto error3; | |
512 | } | |
513 | ||
514 | master->num_chipselect = 2; | |
515 | master->bus_num = pdev->id; | |
516 | master->setup = spi_sh_setup; | |
517 | master->transfer = spi_sh_transfer; | |
518 | master->cleanup = spi_sh_cleanup; | |
519 | ||
520 | ret = spi_register_master(master); | |
521 | if (ret < 0) { | |
522 | printk(KERN_ERR "spi_register_master error.\n"); | |
523 | goto error4; | |
524 | } | |
525 | ||
526 | return 0; | |
527 | ||
528 | error4: | |
529 | free_irq(irq, ss); | |
530 | error3: | |
531 | destroy_workqueue(ss->workqueue); | |
532 | error2: | |
533 | iounmap(ss->addr); | |
534 | error1: | |
535 | spi_master_put(master); | |
536 | ||
537 | return ret; | |
538 | } | |
539 | ||
540 | static struct platform_driver spi_sh_driver = { | |
541 | .probe = spi_sh_probe, | |
fd4a319b | 542 | .remove = spi_sh_remove, |
5c05dd07 YS |
543 | .driver = { |
544 | .name = "sh_spi", | |
545 | .owner = THIS_MODULE, | |
546 | }, | |
547 | }; | |
940ab889 | 548 | module_platform_driver(spi_sh_driver); |
5c05dd07 YS |
549 | |
550 | MODULE_DESCRIPTION("SH SPI bus driver"); | |
551 | MODULE_LICENSE("GPL"); | |
552 | MODULE_AUTHOR("Yoshihiro Shimoda"); | |
553 | MODULE_ALIAS("platform:sh_spi"); |