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754416e1 | 1 | #include <linux/delay.h> |
9b3452d1 SAS |
2 | #include <linux/dmaengine.h> |
3 | #include <linux/dma-mapping.h> | |
4 | #include <linux/platform_device.h> | |
5 | #include <linux/module.h> | |
6 | #include <linux/of.h> | |
7 | #include <linux/slab.h> | |
8 | #include <linux/of_dma.h> | |
9 | #include <linux/of_irq.h> | |
10 | #include <linux/dmapool.h> | |
11 | #include <linux/interrupt.h> | |
12 | #include <linux/of_address.h> | |
d6aafa2b | 13 | #include <linux/pm_runtime.h> |
9b3452d1 SAS |
14 | #include "dmaengine.h" |
15 | ||
16 | #define DESC_TYPE 27 | |
17 | #define DESC_TYPE_HOST 0x10 | |
18 | #define DESC_TYPE_TEARD 0x13 | |
19 | ||
20 | #define TD_DESC_IS_RX (1 << 16) | |
21 | #define TD_DESC_DMA_NUM 10 | |
22 | ||
23 | #define DESC_LENGTH_BITS_NUM 21 | |
24 | ||
25 | #define DESC_TYPE_USB (5 << 26) | |
26 | #define DESC_PD_COMPLETE (1 << 31) | |
27 | ||
28 | /* DMA engine */ | |
29 | #define DMA_TDFDQ 4 | |
30 | #define DMA_TXGCR(x) (0x800 + (x) * 0x20) | |
31 | #define DMA_RXGCR(x) (0x808 + (x) * 0x20) | |
32 | #define RXHPCRA0 4 | |
33 | ||
34 | #define GCR_CHAN_ENABLE (1 << 31) | |
35 | #define GCR_TEARDOWN (1 << 30) | |
36 | #define GCR_STARV_RETRY (1 << 24) | |
37 | #define GCR_DESC_TYPE_HOST (1 << 14) | |
38 | ||
39 | /* DMA scheduler */ | |
40 | #define DMA_SCHED_CTRL 0 | |
41 | #define DMA_SCHED_CTRL_EN (1 << 31) | |
42 | #define DMA_SCHED_WORD(x) ((x) * 4 + 0x800) | |
43 | ||
44 | #define SCHED_ENTRY0_CHAN(x) ((x) << 0) | |
45 | #define SCHED_ENTRY0_IS_RX (1 << 7) | |
46 | ||
47 | #define SCHED_ENTRY1_CHAN(x) ((x) << 8) | |
48 | #define SCHED_ENTRY1_IS_RX (1 << 15) | |
49 | ||
50 | #define SCHED_ENTRY2_CHAN(x) ((x) << 16) | |
51 | #define SCHED_ENTRY2_IS_RX (1 << 23) | |
52 | ||
53 | #define SCHED_ENTRY3_CHAN(x) ((x) << 24) | |
54 | #define SCHED_ENTRY3_IS_RX (1 << 31) | |
55 | ||
56 | /* Queue manager */ | |
57 | /* 4 KiB of memory for descriptors, 2 for each endpoint */ | |
58 | #define ALLOC_DECS_NUM 128 | |
59 | #define DESCS_AREAS 1 | |
60 | #define TOTAL_DESCS_NUM (ALLOC_DECS_NUM * DESCS_AREAS) | |
61 | #define QMGR_SCRATCH_SIZE (TOTAL_DESCS_NUM * 4) | |
62 | ||
63 | #define QMGR_LRAM0_BASE 0x80 | |
64 | #define QMGR_LRAM_SIZE 0x84 | |
65 | #define QMGR_LRAM1_BASE 0x88 | |
66 | #define QMGR_MEMBASE(x) (0x1000 + (x) * 0x10) | |
67 | #define QMGR_MEMCTRL(x) (0x1004 + (x) * 0x10) | |
68 | #define QMGR_MEMCTRL_IDX_SH 16 | |
69 | #define QMGR_MEMCTRL_DESC_SH 8 | |
70 | ||
71 | #define QMGR_NUM_PEND 5 | |
72 | #define QMGR_PEND(x) (0x90 + (x) * 4) | |
73 | ||
74 | #define QMGR_PENDING_SLOT_Q(x) (x / 32) | |
75 | #define QMGR_PENDING_BIT_Q(x) (x % 32) | |
76 | ||
77 | #define QMGR_QUEUE_A(n) (0x2000 + (n) * 0x10) | |
78 | #define QMGR_QUEUE_B(n) (0x2004 + (n) * 0x10) | |
79 | #define QMGR_QUEUE_C(n) (0x2008 + (n) * 0x10) | |
80 | #define QMGR_QUEUE_D(n) (0x200c + (n) * 0x10) | |
81 | ||
82 | /* Glue layer specific */ | |
83 | /* USBSS / USB AM335x */ | |
84 | #define USBSS_IRQ_STATUS 0x28 | |
85 | #define USBSS_IRQ_ENABLER 0x2c | |
86 | #define USBSS_IRQ_CLEARR 0x30 | |
87 | ||
88 | #define USBSS_IRQ_PD_COMP (1 << 2) | |
89 | ||
13bbfb5c DM |
90 | /* Packet Descriptor */ |
91 | #define PD2_ZERO_LENGTH (1 << 19) | |
92 | ||
9b3452d1 SAS |
93 | struct cppi41_channel { |
94 | struct dma_chan chan; | |
95 | struct dma_async_tx_descriptor txd; | |
96 | struct cppi41_dd *cdd; | |
97 | struct cppi41_desc *desc; | |
98 | dma_addr_t desc_phys; | |
99 | void __iomem *gcr_reg; | |
100 | int is_tx; | |
101 | u32 residue; | |
102 | ||
103 | unsigned int q_num; | |
104 | unsigned int q_comp_num; | |
105 | unsigned int port_num; | |
106 | ||
107 | unsigned td_retry; | |
108 | unsigned td_queued:1; | |
109 | unsigned td_seen:1; | |
110 | unsigned td_desc_seen:1; | |
fdea2d09 TL |
111 | |
112 | struct list_head node; /* Node for pending list */ | |
9b3452d1 SAS |
113 | }; |
114 | ||
115 | struct cppi41_desc { | |
116 | u32 pd0; | |
117 | u32 pd1; | |
118 | u32 pd2; | |
119 | u32 pd3; | |
120 | u32 pd4; | |
121 | u32 pd5; | |
122 | u32 pd6; | |
123 | u32 pd7; | |
124 | } __aligned(32); | |
125 | ||
126 | struct chan_queues { | |
127 | u16 submit; | |
128 | u16 complete; | |
129 | }; | |
130 | ||
131 | struct cppi41_dd { | |
132 | struct dma_device ddev; | |
133 | ||
134 | void *qmgr_scratch; | |
135 | dma_addr_t scratch_phys; | |
136 | ||
137 | struct cppi41_desc *cd; | |
138 | dma_addr_t descs_phys; | |
139 | u32 first_td_desc; | |
140 | struct cppi41_channel *chan_busy[ALLOC_DECS_NUM]; | |
141 | ||
142 | void __iomem *usbss_mem; | |
143 | void __iomem *ctrl_mem; | |
144 | void __iomem *sched_mem; | |
145 | void __iomem *qmgr_mem; | |
146 | unsigned int irq; | |
147 | const struct chan_queues *queues_rx; | |
148 | const struct chan_queues *queues_tx; | |
149 | struct chan_queues td_queue; | |
f8964968 | 150 | |
fdea2d09 TL |
151 | struct list_head pending; /* Pending queued transfers */ |
152 | spinlock_t lock; /* Lock for pending list */ | |
153 | ||
f8964968 DM |
154 | /* context for suspend/resume */ |
155 | unsigned int dma_tdfdq; | |
362f4562 TL |
156 | |
157 | bool is_suspended; | |
9b3452d1 SAS |
158 | }; |
159 | ||
160 | #define FIST_COMPLETION_QUEUE 93 | |
161 | static struct chan_queues usb_queues_tx[] = { | |
162 | /* USB0 ENDP 1 */ | |
163 | [ 0] = { .submit = 32, .complete = 93}, | |
164 | [ 1] = { .submit = 34, .complete = 94}, | |
165 | [ 2] = { .submit = 36, .complete = 95}, | |
166 | [ 3] = { .submit = 38, .complete = 96}, | |
167 | [ 4] = { .submit = 40, .complete = 97}, | |
168 | [ 5] = { .submit = 42, .complete = 98}, | |
169 | [ 6] = { .submit = 44, .complete = 99}, | |
170 | [ 7] = { .submit = 46, .complete = 100}, | |
171 | [ 8] = { .submit = 48, .complete = 101}, | |
172 | [ 9] = { .submit = 50, .complete = 102}, | |
173 | [10] = { .submit = 52, .complete = 103}, | |
174 | [11] = { .submit = 54, .complete = 104}, | |
175 | [12] = { .submit = 56, .complete = 105}, | |
176 | [13] = { .submit = 58, .complete = 106}, | |
177 | [14] = { .submit = 60, .complete = 107}, | |
178 | ||
179 | /* USB1 ENDP1 */ | |
180 | [15] = { .submit = 62, .complete = 125}, | |
181 | [16] = { .submit = 64, .complete = 126}, | |
182 | [17] = { .submit = 66, .complete = 127}, | |
183 | [18] = { .submit = 68, .complete = 128}, | |
184 | [19] = { .submit = 70, .complete = 129}, | |
185 | [20] = { .submit = 72, .complete = 130}, | |
186 | [21] = { .submit = 74, .complete = 131}, | |
187 | [22] = { .submit = 76, .complete = 132}, | |
188 | [23] = { .submit = 78, .complete = 133}, | |
189 | [24] = { .submit = 80, .complete = 134}, | |
190 | [25] = { .submit = 82, .complete = 135}, | |
191 | [26] = { .submit = 84, .complete = 136}, | |
192 | [27] = { .submit = 86, .complete = 137}, | |
193 | [28] = { .submit = 88, .complete = 138}, | |
194 | [29] = { .submit = 90, .complete = 139}, | |
195 | }; | |
196 | ||
197 | static const struct chan_queues usb_queues_rx[] = { | |
198 | /* USB0 ENDP 1 */ | |
199 | [ 0] = { .submit = 1, .complete = 109}, | |
200 | [ 1] = { .submit = 2, .complete = 110}, | |
201 | [ 2] = { .submit = 3, .complete = 111}, | |
202 | [ 3] = { .submit = 4, .complete = 112}, | |
203 | [ 4] = { .submit = 5, .complete = 113}, | |
204 | [ 5] = { .submit = 6, .complete = 114}, | |
205 | [ 6] = { .submit = 7, .complete = 115}, | |
206 | [ 7] = { .submit = 8, .complete = 116}, | |
207 | [ 8] = { .submit = 9, .complete = 117}, | |
208 | [ 9] = { .submit = 10, .complete = 118}, | |
209 | [10] = { .submit = 11, .complete = 119}, | |
210 | [11] = { .submit = 12, .complete = 120}, | |
211 | [12] = { .submit = 13, .complete = 121}, | |
212 | [13] = { .submit = 14, .complete = 122}, | |
213 | [14] = { .submit = 15, .complete = 123}, | |
214 | ||
215 | /* USB1 ENDP 1 */ | |
216 | [15] = { .submit = 16, .complete = 141}, | |
217 | [16] = { .submit = 17, .complete = 142}, | |
218 | [17] = { .submit = 18, .complete = 143}, | |
219 | [18] = { .submit = 19, .complete = 144}, | |
220 | [19] = { .submit = 20, .complete = 145}, | |
221 | [20] = { .submit = 21, .complete = 146}, | |
222 | [21] = { .submit = 22, .complete = 147}, | |
223 | [22] = { .submit = 23, .complete = 148}, | |
224 | [23] = { .submit = 24, .complete = 149}, | |
225 | [24] = { .submit = 25, .complete = 150}, | |
226 | [25] = { .submit = 26, .complete = 151}, | |
227 | [26] = { .submit = 27, .complete = 152}, | |
228 | [27] = { .submit = 28, .complete = 153}, | |
229 | [28] = { .submit = 29, .complete = 154}, | |
230 | [29] = { .submit = 30, .complete = 155}, | |
231 | }; | |
232 | ||
233 | struct cppi_glue_infos { | |
234 | irqreturn_t (*isr)(int irq, void *data); | |
235 | const struct chan_queues *queues_rx; | |
236 | const struct chan_queues *queues_tx; | |
237 | struct chan_queues td_queue; | |
238 | }; | |
239 | ||
240 | static struct cppi41_channel *to_cpp41_chan(struct dma_chan *c) | |
241 | { | |
242 | return container_of(c, struct cppi41_channel, chan); | |
243 | } | |
244 | ||
245 | static struct cppi41_channel *desc_to_chan(struct cppi41_dd *cdd, u32 desc) | |
246 | { | |
247 | struct cppi41_channel *c; | |
248 | u32 descs_size; | |
249 | u32 desc_num; | |
250 | ||
251 | descs_size = sizeof(struct cppi41_desc) * ALLOC_DECS_NUM; | |
252 | ||
253 | if (!((desc >= cdd->descs_phys) && | |
254 | (desc < (cdd->descs_phys + descs_size)))) { | |
255 | return NULL; | |
256 | } | |
257 | ||
258 | desc_num = (desc - cdd->descs_phys) / sizeof(struct cppi41_desc); | |
2d17f7fb | 259 | BUG_ON(desc_num >= ALLOC_DECS_NUM); |
9b3452d1 SAS |
260 | c = cdd->chan_busy[desc_num]; |
261 | cdd->chan_busy[desc_num] = NULL; | |
ae4a3e02 TL |
262 | |
263 | /* Usecount for chan_busy[], paired with push_desc_queue() */ | |
264 | pm_runtime_put(cdd->ddev.dev); | |
265 | ||
9b3452d1 SAS |
266 | return c; |
267 | } | |
268 | ||
269 | static void cppi_writel(u32 val, void *__iomem *mem) | |
270 | { | |
271 | __raw_writel(val, mem); | |
272 | } | |
273 | ||
274 | static u32 cppi_readl(void *__iomem *mem) | |
275 | { | |
276 | return __raw_readl(mem); | |
277 | } | |
278 | ||
279 | static u32 pd_trans_len(u32 val) | |
280 | { | |
281 | return val & ((1 << (DESC_LENGTH_BITS_NUM + 1)) - 1); | |
282 | } | |
283 | ||
706ff628 DM |
284 | static u32 cppi41_pop_desc(struct cppi41_dd *cdd, unsigned queue_num) |
285 | { | |
286 | u32 desc; | |
287 | ||
288 | desc = cppi_readl(cdd->qmgr_mem + QMGR_QUEUE_D(queue_num)); | |
289 | desc &= ~0x1f; | |
290 | return desc; | |
291 | } | |
292 | ||
9b3452d1 SAS |
293 | static irqreturn_t cppi41_irq(int irq, void *data) |
294 | { | |
295 | struct cppi41_dd *cdd = data; | |
296 | struct cppi41_channel *c; | |
297 | u32 status; | |
298 | int i; | |
299 | ||
300 | status = cppi_readl(cdd->usbss_mem + USBSS_IRQ_STATUS); | |
301 | if (!(status & USBSS_IRQ_PD_COMP)) | |
302 | return IRQ_NONE; | |
303 | cppi_writel(status, cdd->usbss_mem + USBSS_IRQ_STATUS); | |
304 | ||
305 | for (i = QMGR_PENDING_SLOT_Q(FIST_COMPLETION_QUEUE); i < QMGR_NUM_PEND; | |
306 | i++) { | |
307 | u32 val; | |
308 | u32 q_num; | |
309 | ||
310 | val = cppi_readl(cdd->qmgr_mem + QMGR_PEND(i)); | |
311 | if (i == QMGR_PENDING_SLOT_Q(FIST_COMPLETION_QUEUE) && val) { | |
312 | u32 mask; | |
313 | /* set corresponding bit for completetion Q 93 */ | |
314 | mask = 1 << QMGR_PENDING_BIT_Q(FIST_COMPLETION_QUEUE); | |
315 | /* not set all bits for queues less than Q 93 */ | |
316 | mask--; | |
317 | /* now invert and keep only Q 93+ set */ | |
318 | val &= ~mask; | |
319 | } | |
320 | ||
321 | if (val) | |
322 | __iormb(); | |
323 | ||
324 | while (val) { | |
13bbfb5c | 325 | u32 desc, len; |
9b3452d1 | 326 | |
6610d0ed TL |
327 | /* |
328 | * This should never trigger, see the comments in | |
329 | * push_desc_queue() | |
330 | */ | |
331 | WARN_ON(cdd->is_suspended); | |
098de42a | 332 | |
9b3452d1 SAS |
333 | q_num = __fls(val); |
334 | val &= ~(1 << q_num); | |
335 | q_num += 32 * i; | |
706ff628 | 336 | desc = cppi41_pop_desc(cdd, q_num); |
9b3452d1 SAS |
337 | c = desc_to_chan(cdd, desc); |
338 | if (WARN_ON(!c)) { | |
339 | pr_err("%s() q %d desc %08x\n", __func__, | |
340 | q_num, desc); | |
341 | continue; | |
342 | } | |
9b3452d1 | 343 | |
13bbfb5c DM |
344 | if (c->desc->pd2 & PD2_ZERO_LENGTH) |
345 | len = 0; | |
346 | else | |
347 | len = pd_trans_len(c->desc->pd0); | |
348 | ||
349 | c->residue = pd_trans_len(c->desc->pd6) - len; | |
9b3452d1 | 350 | dma_cookie_complete(&c->txd); |
b310a619 | 351 | dmaengine_desc_get_callback_invoke(&c->txd, NULL); |
9b3452d1 SAS |
352 | } |
353 | } | |
354 | return IRQ_HANDLED; | |
355 | } | |
356 | ||
357 | static dma_cookie_t cppi41_tx_submit(struct dma_async_tx_descriptor *tx) | |
358 | { | |
359 | dma_cookie_t cookie; | |
360 | ||
361 | cookie = dma_cookie_assign(tx); | |
362 | ||
363 | return cookie; | |
364 | } | |
365 | ||
366 | static int cppi41_dma_alloc_chan_resources(struct dma_chan *chan) | |
367 | { | |
368 | struct cppi41_channel *c = to_cpp41_chan(chan); | |
fdea2d09 TL |
369 | struct cppi41_dd *cdd = c->cdd; |
370 | int error; | |
371 | ||
372 | error = pm_runtime_get_sync(cdd->ddev.dev); | |
740b4be3 | 373 | if (error < 0) { |
d5afc1b6 TL |
374 | dev_err(cdd->ddev.dev, "%s pm runtime get: %i\n", |
375 | __func__, error); | |
740b4be3 TL |
376 | pm_runtime_put_noidle(cdd->ddev.dev); |
377 | ||
fdea2d09 | 378 | return error; |
740b4be3 | 379 | } |
9b3452d1 SAS |
380 | |
381 | dma_cookie_init(chan); | |
382 | dma_async_tx_descriptor_init(&c->txd, chan); | |
383 | c->txd.tx_submit = cppi41_tx_submit; | |
384 | ||
385 | if (!c->is_tx) | |
386 | cppi_writel(c->q_num, c->gcr_reg + RXHPCRA0); | |
387 | ||
fdea2d09 TL |
388 | pm_runtime_mark_last_busy(cdd->ddev.dev); |
389 | pm_runtime_put_autosuspend(cdd->ddev.dev); | |
390 | ||
9b3452d1 SAS |
391 | return 0; |
392 | } | |
393 | ||
394 | static void cppi41_dma_free_chan_resources(struct dma_chan *chan) | |
395 | { | |
fdea2d09 TL |
396 | struct cppi41_channel *c = to_cpp41_chan(chan); |
397 | struct cppi41_dd *cdd = c->cdd; | |
398 | int error; | |
399 | ||
400 | error = pm_runtime_get_sync(cdd->ddev.dev); | |
740b4be3 TL |
401 | if (error < 0) { |
402 | pm_runtime_put_noidle(cdd->ddev.dev); | |
403 | ||
fdea2d09 | 404 | return; |
740b4be3 | 405 | } |
fdea2d09 TL |
406 | |
407 | WARN_ON(!list_empty(&cdd->pending)); | |
408 | ||
409 | pm_runtime_mark_last_busy(cdd->ddev.dev); | |
410 | pm_runtime_put_autosuspend(cdd->ddev.dev); | |
9b3452d1 SAS |
411 | } |
412 | ||
413 | static enum dma_status cppi41_dma_tx_status(struct dma_chan *chan, | |
414 | dma_cookie_t cookie, struct dma_tx_state *txstate) | |
415 | { | |
416 | struct cppi41_channel *c = to_cpp41_chan(chan); | |
417 | enum dma_status ret; | |
418 | ||
419 | /* lock */ | |
420 | ret = dma_cookie_status(chan, cookie, txstate); | |
ed83c0c8 | 421 | if (txstate && ret == DMA_COMPLETE) |
9b3452d1 SAS |
422 | txstate->residue = c->residue; |
423 | /* unlock */ | |
424 | ||
425 | return ret; | |
426 | } | |
427 | ||
428 | static void push_desc_queue(struct cppi41_channel *c) | |
429 | { | |
430 | struct cppi41_dd *cdd = c->cdd; | |
431 | u32 desc_num; | |
432 | u32 desc_phys; | |
433 | u32 reg; | |
434 | ||
9b3452d1 SAS |
435 | c->residue = 0; |
436 | ||
437 | reg = GCR_CHAN_ENABLE; | |
438 | if (!c->is_tx) { | |
439 | reg |= GCR_STARV_RETRY; | |
440 | reg |= GCR_DESC_TYPE_HOST; | |
441 | reg |= c->q_comp_num; | |
442 | } | |
443 | ||
444 | cppi_writel(reg, c->gcr_reg); | |
445 | ||
446 | /* | |
447 | * We don't use writel() but __raw_writel() so we have to make sure | |
448 | * that the DMA descriptor in coherent memory made to the main memory | |
449 | * before starting the dma engine. | |
450 | */ | |
451 | __iowmb(); | |
670fc2a8 | 452 | |
ae4a3e02 TL |
453 | /* |
454 | * DMA transfers can take at least 200ms to complete with USB mass | |
455 | * storage connected. To prevent autosuspend timeouts, we must use | |
456 | * pm_runtime_get/put() when chan_busy[] is modified. This will get | |
457 | * cleared in desc_to_chan() or cppi41_stop_chan() depending on the | |
458 | * outcome of the transfer. | |
459 | */ | |
460 | pm_runtime_get(cdd->ddev.dev); | |
461 | ||
670fc2a8 TL |
462 | desc_phys = lower_32_bits(c->desc_phys); |
463 | desc_num = (desc_phys - cdd->descs_phys) / sizeof(struct cppi41_desc); | |
464 | WARN_ON(cdd->chan_busy[desc_num]); | |
465 | cdd->chan_busy[desc_num] = c; | |
466 | ||
467 | reg = (sizeof(struct cppi41_desc) - 24) / 4; | |
468 | reg |= desc_phys; | |
469 | cppi_writel(reg, cdd->qmgr_mem + QMGR_QUEUE_D(c->q_num)); | |
470 | } | |
471 | ||
362f4562 TL |
472 | /* |
473 | * Caller must hold cdd->lock to prevent push_desc_queue() | |
474 | * getting called out of order. We have both cppi41_dma_issue_pending() | |
475 | * and cppi41_runtime_resume() call this function. | |
476 | */ | |
477 | static void cppi41_run_queue(struct cppi41_dd *cdd) | |
fdea2d09 | 478 | { |
362f4562 | 479 | struct cppi41_channel *c, *_c; |
fdea2d09 | 480 | |
362f4562 TL |
481 | list_for_each_entry_safe(c, _c, &cdd->pending, node) { |
482 | push_desc_queue(c); | |
483 | list_del(&c->node); | |
484 | } | |
fdea2d09 TL |
485 | } |
486 | ||
670fc2a8 TL |
487 | static void cppi41_dma_issue_pending(struct dma_chan *chan) |
488 | { | |
489 | struct cppi41_channel *c = to_cpp41_chan(chan); | |
fdea2d09 | 490 | struct cppi41_dd *cdd = c->cdd; |
362f4562 | 491 | unsigned long flags; |
fdea2d09 TL |
492 | int error; |
493 | ||
fdea2d09 | 494 | error = pm_runtime_get(cdd->ddev.dev); |
f2f6f828 | 495 | if ((error != -EINPROGRESS) && error < 0) { |
740b4be3 | 496 | pm_runtime_put_noidle(cdd->ddev.dev); |
fdea2d09 TL |
497 | dev_err(cdd->ddev.dev, "Failed to pm_runtime_get: %i\n", |
498 | error); | |
670fc2a8 | 499 | |
fdea2d09 TL |
500 | return; |
501 | } | |
502 | ||
362f4562 TL |
503 | spin_lock_irqsave(&cdd->lock, flags); |
504 | list_add_tail(&c->node, &cdd->pending); | |
505 | if (!cdd->is_suspended) | |
506 | cppi41_run_queue(cdd); | |
507 | spin_unlock_irqrestore(&cdd->lock, flags); | |
098de42a TL |
508 | |
509 | pm_runtime_mark_last_busy(cdd->ddev.dev); | |
510 | pm_runtime_put_autosuspend(cdd->ddev.dev); | |
9b3452d1 SAS |
511 | } |
512 | ||
513 | static u32 get_host_pd0(u32 length) | |
514 | { | |
515 | u32 reg; | |
516 | ||
517 | reg = DESC_TYPE_HOST << DESC_TYPE; | |
518 | reg |= length; | |
519 | ||
520 | return reg; | |
521 | } | |
522 | ||
523 | static u32 get_host_pd1(struct cppi41_channel *c) | |
524 | { | |
525 | u32 reg; | |
526 | ||
527 | reg = 0; | |
528 | ||
529 | return reg; | |
530 | } | |
531 | ||
532 | static u32 get_host_pd2(struct cppi41_channel *c) | |
533 | { | |
534 | u32 reg; | |
535 | ||
536 | reg = DESC_TYPE_USB; | |
537 | reg |= c->q_comp_num; | |
538 | ||
539 | return reg; | |
540 | } | |
541 | ||
542 | static u32 get_host_pd3(u32 length) | |
543 | { | |
544 | u32 reg; | |
545 | ||
546 | /* PD3 = packet size */ | |
547 | reg = length; | |
548 | ||
549 | return reg; | |
550 | } | |
551 | ||
552 | static u32 get_host_pd6(u32 length) | |
553 | { | |
554 | u32 reg; | |
555 | ||
556 | /* PD6 buffer size */ | |
557 | reg = DESC_PD_COMPLETE; | |
558 | reg |= length; | |
559 | ||
560 | return reg; | |
561 | } | |
562 | ||
563 | static u32 get_host_pd4_or_7(u32 addr) | |
564 | { | |
565 | u32 reg; | |
566 | ||
567 | reg = addr; | |
568 | ||
569 | return reg; | |
570 | } | |
571 | ||
572 | static u32 get_host_pd5(void) | |
573 | { | |
574 | u32 reg; | |
575 | ||
576 | reg = 0; | |
577 | ||
578 | return reg; | |
579 | } | |
580 | ||
581 | static struct dma_async_tx_descriptor *cppi41_dma_prep_slave_sg( | |
582 | struct dma_chan *chan, struct scatterlist *sgl, unsigned sg_len, | |
583 | enum dma_transfer_direction dir, unsigned long tx_flags, void *context) | |
584 | { | |
585 | struct cppi41_channel *c = to_cpp41_chan(chan); | |
586 | struct cppi41_desc *d; | |
587 | struct scatterlist *sg; | |
588 | unsigned int i; | |
9b3452d1 | 589 | |
9b3452d1 SAS |
590 | d = c->desc; |
591 | for_each_sg(sgl, sg, sg_len, i) { | |
592 | u32 addr; | |
593 | u32 len; | |
594 | ||
595 | /* We need to use more than one desc once musb supports sg */ | |
9b3452d1 SAS |
596 | addr = lower_32_bits(sg_dma_address(sg)); |
597 | len = sg_dma_len(sg); | |
598 | ||
599 | d->pd0 = get_host_pd0(len); | |
600 | d->pd1 = get_host_pd1(c); | |
601 | d->pd2 = get_host_pd2(c); | |
602 | d->pd3 = get_host_pd3(len); | |
603 | d->pd4 = get_host_pd4_or_7(addr); | |
604 | d->pd5 = get_host_pd5(); | |
605 | d->pd6 = get_host_pd6(len); | |
606 | d->pd7 = get_host_pd4_or_7(addr); | |
607 | ||
608 | d++; | |
609 | } | |
610 | ||
611 | return &c->txd; | |
612 | } | |
613 | ||
9b3452d1 SAS |
614 | static void cppi41_compute_td_desc(struct cppi41_desc *d) |
615 | { | |
616 | d->pd0 = DESC_TYPE_TEARD << DESC_TYPE; | |
617 | } | |
618 | ||
9b3452d1 SAS |
619 | static int cppi41_tear_down_chan(struct cppi41_channel *c) |
620 | { | |
621 | struct cppi41_dd *cdd = c->cdd; | |
622 | struct cppi41_desc *td; | |
623 | u32 reg; | |
624 | u32 desc_phys; | |
625 | u32 td_desc_phys; | |
626 | ||
627 | td = cdd->cd; | |
628 | td += cdd->first_td_desc; | |
629 | ||
630 | td_desc_phys = cdd->descs_phys; | |
631 | td_desc_phys += cdd->first_td_desc * sizeof(struct cppi41_desc); | |
632 | ||
633 | if (!c->td_queued) { | |
634 | cppi41_compute_td_desc(td); | |
635 | __iowmb(); | |
636 | ||
637 | reg = (sizeof(struct cppi41_desc) - 24) / 4; | |
638 | reg |= td_desc_phys; | |
639 | cppi_writel(reg, cdd->qmgr_mem + | |
640 | QMGR_QUEUE_D(cdd->td_queue.submit)); | |
641 | ||
642 | reg = GCR_CHAN_ENABLE; | |
643 | if (!c->is_tx) { | |
644 | reg |= GCR_STARV_RETRY; | |
645 | reg |= GCR_DESC_TYPE_HOST; | |
646 | reg |= c->q_comp_num; | |
647 | } | |
648 | reg |= GCR_TEARDOWN; | |
649 | cppi_writel(reg, c->gcr_reg); | |
650 | c->td_queued = 1; | |
6f9d7056 | 651 | c->td_retry = 500; |
9b3452d1 SAS |
652 | } |
653 | ||
1e378a6d | 654 | if (!c->td_seen || !c->td_desc_seen) { |
9b3452d1 | 655 | |
1e378a6d SAS |
656 | desc_phys = cppi41_pop_desc(cdd, cdd->td_queue.complete); |
657 | if (!desc_phys) | |
658 | desc_phys = cppi41_pop_desc(cdd, c->q_comp_num); | |
9b3452d1 | 659 | |
1e378a6d SAS |
660 | if (desc_phys == c->desc_phys) { |
661 | c->td_desc_seen = 1; | |
662 | ||
663 | } else if (desc_phys == td_desc_phys) { | |
664 | u32 pd0; | |
9b3452d1 | 665 | |
9b3452d1 | 666 | __iormb(); |
1e378a6d SAS |
667 | pd0 = td->pd0; |
668 | WARN_ON((pd0 >> DESC_TYPE) != DESC_TYPE_TEARD); | |
669 | WARN_ON(!c->is_tx && !(pd0 & TD_DESC_IS_RX)); | |
670 | WARN_ON((pd0 & 0x1f) != c->port_num); | |
671 | c->td_seen = 1; | |
672 | } else if (desc_phys) { | |
673 | WARN_ON_ONCE(1); | |
9b3452d1 SAS |
674 | } |
675 | } | |
676 | c->td_retry--; | |
677 | /* | |
678 | * If the TX descriptor / channel is in use, the caller needs to poke | |
679 | * his TD bit multiple times. After that he hardware releases the | |
680 | * transfer descriptor followed by TD descriptor. Waiting seems not to | |
681 | * cause any difference. | |
682 | * RX seems to be thrown out right away. However once the TearDown | |
683 | * descriptor gets through we are done. If we have seens the transfer | |
684 | * descriptor before the TD we fetch it from enqueue, it has to be | |
685 | * there waiting for us. | |
686 | */ | |
754416e1 SAS |
687 | if (!c->td_seen && c->td_retry) { |
688 | udelay(1); | |
9b3452d1 | 689 | return -EAGAIN; |
754416e1 | 690 | } |
9b3452d1 | 691 | WARN_ON(!c->td_retry); |
754416e1 | 692 | |
9b3452d1 | 693 | if (!c->td_desc_seen) { |
706ff628 | 694 | desc_phys = cppi41_pop_desc(cdd, c->q_num); |
754416e1 SAS |
695 | if (!desc_phys) |
696 | desc_phys = cppi41_pop_desc(cdd, c->q_comp_num); | |
9b3452d1 SAS |
697 | WARN_ON(!desc_phys); |
698 | } | |
699 | ||
700 | c->td_queued = 0; | |
701 | c->td_seen = 0; | |
702 | c->td_desc_seen = 0; | |
703 | cppi_writel(0, c->gcr_reg); | |
704 | return 0; | |
705 | } | |
706 | ||
707 | static int cppi41_stop_chan(struct dma_chan *chan) | |
708 | { | |
709 | struct cppi41_channel *c = to_cpp41_chan(chan); | |
710 | struct cppi41_dd *cdd = c->cdd; | |
711 | u32 desc_num; | |
712 | u32 desc_phys; | |
713 | int ret; | |
714 | ||
975faaeb GC |
715 | desc_phys = lower_32_bits(c->desc_phys); |
716 | desc_num = (desc_phys - cdd->descs_phys) / sizeof(struct cppi41_desc); | |
717 | if (!cdd->chan_busy[desc_num]) | |
718 | return 0; | |
719 | ||
9b3452d1 SAS |
720 | ret = cppi41_tear_down_chan(c); |
721 | if (ret) | |
722 | return ret; | |
723 | ||
9b3452d1 SAS |
724 | WARN_ON(!cdd->chan_busy[desc_num]); |
725 | cdd->chan_busy[desc_num] = NULL; | |
726 | ||
ae4a3e02 TL |
727 | /* Usecount for chan_busy[], paired with push_desc_queue() */ |
728 | pm_runtime_put(cdd->ddev.dev); | |
729 | ||
9b3452d1 SAS |
730 | return 0; |
731 | } | |
732 | ||
9b3452d1 SAS |
733 | static void cleanup_chans(struct cppi41_dd *cdd) |
734 | { | |
735 | while (!list_empty(&cdd->ddev.channels)) { | |
736 | struct cppi41_channel *cchan; | |
737 | ||
738 | cchan = list_first_entry(&cdd->ddev.channels, | |
739 | struct cppi41_channel, chan.device_node); | |
740 | list_del(&cchan->chan.device_node); | |
741 | kfree(cchan); | |
742 | } | |
743 | } | |
744 | ||
e327e21f | 745 | static int cppi41_add_chans(struct device *dev, struct cppi41_dd *cdd) |
9b3452d1 SAS |
746 | { |
747 | struct cppi41_channel *cchan; | |
748 | int i; | |
749 | int ret; | |
750 | u32 n_chans; | |
751 | ||
e327e21f | 752 | ret = of_property_read_u32(dev->of_node, "#dma-channels", |
9b3452d1 SAS |
753 | &n_chans); |
754 | if (ret) | |
755 | return ret; | |
756 | /* | |
757 | * The channels can only be used as TX or as RX. So we add twice | |
758 | * that much dma channels because USB can only do RX or TX. | |
759 | */ | |
760 | n_chans *= 2; | |
761 | ||
762 | for (i = 0; i < n_chans; i++) { | |
763 | cchan = kzalloc(sizeof(*cchan), GFP_KERNEL); | |
764 | if (!cchan) | |
765 | goto err; | |
766 | ||
767 | cchan->cdd = cdd; | |
768 | if (i & 1) { | |
769 | cchan->gcr_reg = cdd->ctrl_mem + DMA_TXGCR(i >> 1); | |
770 | cchan->is_tx = 1; | |
771 | } else { | |
772 | cchan->gcr_reg = cdd->ctrl_mem + DMA_RXGCR(i >> 1); | |
773 | cchan->is_tx = 0; | |
774 | } | |
775 | cchan->port_num = i >> 1; | |
776 | cchan->desc = &cdd->cd[i]; | |
777 | cchan->desc_phys = cdd->descs_phys; | |
778 | cchan->desc_phys += i * sizeof(struct cppi41_desc); | |
779 | cchan->chan.device = &cdd->ddev; | |
780 | list_add_tail(&cchan->chan.device_node, &cdd->ddev.channels); | |
781 | } | |
782 | cdd->first_td_desc = n_chans; | |
783 | ||
784 | return 0; | |
785 | err: | |
786 | cleanup_chans(cdd); | |
787 | return -ENOMEM; | |
788 | } | |
789 | ||
e327e21f | 790 | static void purge_descs(struct device *dev, struct cppi41_dd *cdd) |
9b3452d1 SAS |
791 | { |
792 | unsigned int mem_decs; | |
793 | int i; | |
794 | ||
795 | mem_decs = ALLOC_DECS_NUM * sizeof(struct cppi41_desc); | |
796 | ||
797 | for (i = 0; i < DESCS_AREAS; i++) { | |
798 | ||
799 | cppi_writel(0, cdd->qmgr_mem + QMGR_MEMBASE(i)); | |
800 | cppi_writel(0, cdd->qmgr_mem + QMGR_MEMCTRL(i)); | |
801 | ||
e327e21f | 802 | dma_free_coherent(dev, mem_decs, cdd->cd, |
9b3452d1 SAS |
803 | cdd->descs_phys); |
804 | } | |
805 | } | |
806 | ||
807 | static void disable_sched(struct cppi41_dd *cdd) | |
808 | { | |
809 | cppi_writel(0, cdd->sched_mem + DMA_SCHED_CTRL); | |
810 | } | |
811 | ||
b46ce4d0 | 812 | static void deinit_cppi41(struct device *dev, struct cppi41_dd *cdd) |
9b3452d1 SAS |
813 | { |
814 | disable_sched(cdd); | |
815 | ||
e327e21f | 816 | purge_descs(dev, cdd); |
9b3452d1 SAS |
817 | |
818 | cppi_writel(0, cdd->qmgr_mem + QMGR_LRAM0_BASE); | |
819 | cppi_writel(0, cdd->qmgr_mem + QMGR_LRAM0_BASE); | |
e327e21f | 820 | dma_free_coherent(dev, QMGR_SCRATCH_SIZE, cdd->qmgr_scratch, |
9b3452d1 SAS |
821 | cdd->scratch_phys); |
822 | } | |
823 | ||
e327e21f | 824 | static int init_descs(struct device *dev, struct cppi41_dd *cdd) |
9b3452d1 SAS |
825 | { |
826 | unsigned int desc_size; | |
827 | unsigned int mem_decs; | |
828 | int i; | |
829 | u32 reg; | |
830 | u32 idx; | |
831 | ||
832 | BUILD_BUG_ON(sizeof(struct cppi41_desc) & | |
833 | (sizeof(struct cppi41_desc) - 1)); | |
834 | BUILD_BUG_ON(sizeof(struct cppi41_desc) < 32); | |
835 | BUILD_BUG_ON(ALLOC_DECS_NUM < 32); | |
836 | ||
837 | desc_size = sizeof(struct cppi41_desc); | |
838 | mem_decs = ALLOC_DECS_NUM * desc_size; | |
839 | ||
840 | idx = 0; | |
841 | for (i = 0; i < DESCS_AREAS; i++) { | |
842 | ||
843 | reg = idx << QMGR_MEMCTRL_IDX_SH; | |
844 | reg |= (ilog2(desc_size) - 5) << QMGR_MEMCTRL_DESC_SH; | |
845 | reg |= ilog2(ALLOC_DECS_NUM) - 5; | |
846 | ||
847 | BUILD_BUG_ON(DESCS_AREAS != 1); | |
e327e21f | 848 | cdd->cd = dma_alloc_coherent(dev, mem_decs, |
9b3452d1 SAS |
849 | &cdd->descs_phys, GFP_KERNEL); |
850 | if (!cdd->cd) | |
851 | return -ENOMEM; | |
852 | ||
853 | cppi_writel(cdd->descs_phys, cdd->qmgr_mem + QMGR_MEMBASE(i)); | |
854 | cppi_writel(reg, cdd->qmgr_mem + QMGR_MEMCTRL(i)); | |
855 | ||
856 | idx += ALLOC_DECS_NUM; | |
857 | } | |
858 | return 0; | |
859 | } | |
860 | ||
861 | static void init_sched(struct cppi41_dd *cdd) | |
862 | { | |
863 | unsigned ch; | |
864 | unsigned word; | |
865 | u32 reg; | |
866 | ||
867 | word = 0; | |
868 | cppi_writel(0, cdd->sched_mem + DMA_SCHED_CTRL); | |
869 | for (ch = 0; ch < 15 * 2; ch += 2) { | |
870 | ||
871 | reg = SCHED_ENTRY0_CHAN(ch); | |
872 | reg |= SCHED_ENTRY1_CHAN(ch) | SCHED_ENTRY1_IS_RX; | |
873 | ||
874 | reg |= SCHED_ENTRY2_CHAN(ch + 1); | |
875 | reg |= SCHED_ENTRY3_CHAN(ch + 1) | SCHED_ENTRY3_IS_RX; | |
876 | cppi_writel(reg, cdd->sched_mem + DMA_SCHED_WORD(word)); | |
877 | word++; | |
878 | } | |
879 | reg = 15 * 2 * 2 - 1; | |
880 | reg |= DMA_SCHED_CTRL_EN; | |
881 | cppi_writel(reg, cdd->sched_mem + DMA_SCHED_CTRL); | |
882 | } | |
883 | ||
e327e21f | 884 | static int init_cppi41(struct device *dev, struct cppi41_dd *cdd) |
9b3452d1 SAS |
885 | { |
886 | int ret; | |
887 | ||
888 | BUILD_BUG_ON(QMGR_SCRATCH_SIZE > ((1 << 14) - 1)); | |
e327e21f | 889 | cdd->qmgr_scratch = dma_alloc_coherent(dev, QMGR_SCRATCH_SIZE, |
9b3452d1 SAS |
890 | &cdd->scratch_phys, GFP_KERNEL); |
891 | if (!cdd->qmgr_scratch) | |
892 | return -ENOMEM; | |
893 | ||
894 | cppi_writel(cdd->scratch_phys, cdd->qmgr_mem + QMGR_LRAM0_BASE); | |
895 | cppi_writel(QMGR_SCRATCH_SIZE, cdd->qmgr_mem + QMGR_LRAM_SIZE); | |
896 | cppi_writel(0, cdd->qmgr_mem + QMGR_LRAM1_BASE); | |
897 | ||
e327e21f | 898 | ret = init_descs(dev, cdd); |
9b3452d1 SAS |
899 | if (ret) |
900 | goto err_td; | |
901 | ||
902 | cppi_writel(cdd->td_queue.submit, cdd->ctrl_mem + DMA_TDFDQ); | |
903 | init_sched(cdd); | |
904 | return 0; | |
905 | err_td: | |
b46ce4d0 | 906 | deinit_cppi41(dev, cdd); |
9b3452d1 SAS |
907 | return ret; |
908 | } | |
909 | ||
910 | static struct platform_driver cpp41_dma_driver; | |
911 | /* | |
912 | * The param format is: | |
913 | * X Y | |
914 | * X: Port | |
915 | * Y: 0 = RX else TX | |
916 | */ | |
917 | #define INFO_PORT 0 | |
918 | #define INFO_IS_TX 1 | |
919 | ||
920 | static bool cpp41_dma_filter_fn(struct dma_chan *chan, void *param) | |
921 | { | |
922 | struct cppi41_channel *cchan; | |
923 | struct cppi41_dd *cdd; | |
924 | const struct chan_queues *queues; | |
925 | u32 *num = param; | |
926 | ||
927 | if (chan->device->dev->driver != &cpp41_dma_driver.driver) | |
928 | return false; | |
929 | ||
930 | cchan = to_cpp41_chan(chan); | |
931 | ||
932 | if (cchan->port_num != num[INFO_PORT]) | |
933 | return false; | |
934 | ||
935 | if (cchan->is_tx && !num[INFO_IS_TX]) | |
936 | return false; | |
937 | cdd = cchan->cdd; | |
938 | if (cchan->is_tx) | |
939 | queues = cdd->queues_tx; | |
940 | else | |
941 | queues = cdd->queues_rx; | |
942 | ||
943 | BUILD_BUG_ON(ARRAY_SIZE(usb_queues_rx) != ARRAY_SIZE(usb_queues_tx)); | |
944 | if (WARN_ON(cchan->port_num > ARRAY_SIZE(usb_queues_rx))) | |
945 | return false; | |
946 | ||
947 | cchan->q_num = queues[cchan->port_num].submit; | |
948 | cchan->q_comp_num = queues[cchan->port_num].complete; | |
949 | return true; | |
950 | } | |
951 | ||
952 | static struct of_dma_filter_info cpp41_dma_info = { | |
953 | .filter_fn = cpp41_dma_filter_fn, | |
954 | }; | |
955 | ||
956 | static struct dma_chan *cppi41_dma_xlate(struct of_phandle_args *dma_spec, | |
957 | struct of_dma *ofdma) | |
958 | { | |
959 | int count = dma_spec->args_count; | |
960 | struct of_dma_filter_info *info = ofdma->of_dma_data; | |
961 | ||
962 | if (!info || !info->filter_fn) | |
963 | return NULL; | |
964 | ||
965 | if (count != 2) | |
966 | return NULL; | |
967 | ||
968 | return dma_request_channel(info->dma_cap, info->filter_fn, | |
969 | &dma_spec->args[0]); | |
970 | } | |
971 | ||
972 | static const struct cppi_glue_infos usb_infos = { | |
973 | .isr = cppi41_irq, | |
974 | .queues_rx = usb_queues_rx, | |
975 | .queues_tx = usb_queues_tx, | |
976 | .td_queue = { .submit = 31, .complete = 0 }, | |
977 | }; | |
978 | ||
979 | static const struct of_device_id cppi41_dma_ids[] = { | |
980 | { .compatible = "ti,am3359-cppi41", .data = &usb_infos}, | |
981 | {}, | |
982 | }; | |
983 | MODULE_DEVICE_TABLE(of, cppi41_dma_ids); | |
984 | ||
e327e21f | 985 | static const struct cppi_glue_infos *get_glue_info(struct device *dev) |
9b3452d1 SAS |
986 | { |
987 | const struct of_device_id *of_id; | |
988 | ||
e327e21f | 989 | of_id = of_match_node(cppi41_dma_ids, dev->of_node); |
9b3452d1 SAS |
990 | if (!of_id) |
991 | return NULL; | |
992 | return of_id->data; | |
993 | } | |
994 | ||
ffeb13aa FB |
995 | #define CPPI41_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ |
996 | BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ | |
997 | BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \ | |
998 | BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) | |
999 | ||
9b3452d1 SAS |
1000 | static int cppi41_dma_probe(struct platform_device *pdev) |
1001 | { | |
1002 | struct cppi41_dd *cdd; | |
717d8181 | 1003 | struct device *dev = &pdev->dev; |
9b3452d1 SAS |
1004 | const struct cppi_glue_infos *glue_info; |
1005 | int irq; | |
1006 | int ret; | |
1007 | ||
717d8181 | 1008 | glue_info = get_glue_info(dev); |
9b3452d1 SAS |
1009 | if (!glue_info) |
1010 | return -EINVAL; | |
1011 | ||
f0f3b5fa | 1012 | cdd = devm_kzalloc(&pdev->dev, sizeof(*cdd), GFP_KERNEL); |
9b3452d1 SAS |
1013 | if (!cdd) |
1014 | return -ENOMEM; | |
1015 | ||
1016 | dma_cap_set(DMA_SLAVE, cdd->ddev.cap_mask); | |
1017 | cdd->ddev.device_alloc_chan_resources = cppi41_dma_alloc_chan_resources; | |
1018 | cdd->ddev.device_free_chan_resources = cppi41_dma_free_chan_resources; | |
1019 | cdd->ddev.device_tx_status = cppi41_dma_tx_status; | |
1020 | cdd->ddev.device_issue_pending = cppi41_dma_issue_pending; | |
1021 | cdd->ddev.device_prep_slave_sg = cppi41_dma_prep_slave_sg; | |
3b5a03a6 | 1022 | cdd->ddev.device_terminate_all = cppi41_stop_chan; |
ffeb13aa FB |
1023 | cdd->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); |
1024 | cdd->ddev.src_addr_widths = CPPI41_DMA_BUSWIDTHS; | |
1025 | cdd->ddev.dst_addr_widths = CPPI41_DMA_BUSWIDTHS; | |
1026 | cdd->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; | |
717d8181 | 1027 | cdd->ddev.dev = dev; |
9b3452d1 SAS |
1028 | INIT_LIST_HEAD(&cdd->ddev.channels); |
1029 | cpp41_dma_info.dma_cap = cdd->ddev.cap_mask; | |
1030 | ||
717d8181 DM |
1031 | cdd->usbss_mem = of_iomap(dev->of_node, 0); |
1032 | cdd->ctrl_mem = of_iomap(dev->of_node, 1); | |
1033 | cdd->sched_mem = of_iomap(dev->of_node, 2); | |
1034 | cdd->qmgr_mem = of_iomap(dev->of_node, 3); | |
fdea2d09 TL |
1035 | spin_lock_init(&cdd->lock); |
1036 | INIT_LIST_HEAD(&cdd->pending); | |
1037 | ||
1038 | platform_set_drvdata(pdev, cdd); | |
9b3452d1 SAS |
1039 | |
1040 | if (!cdd->usbss_mem || !cdd->ctrl_mem || !cdd->sched_mem || | |
f0f3b5fa KP |
1041 | !cdd->qmgr_mem) |
1042 | return -ENXIO; | |
9b3452d1 | 1043 | |
717d8181 | 1044 | pm_runtime_enable(dev); |
fdea2d09 TL |
1045 | pm_runtime_set_autosuspend_delay(dev, 100); |
1046 | pm_runtime_use_autosuspend(dev); | |
717d8181 | 1047 | ret = pm_runtime_get_sync(dev); |
cbf1e56e | 1048 | if (ret < 0) |
d6aafa2b SAS |
1049 | goto err_get_sync; |
1050 | ||
9b3452d1 SAS |
1051 | cdd->queues_rx = glue_info->queues_rx; |
1052 | cdd->queues_tx = glue_info->queues_tx; | |
1053 | cdd->td_queue = glue_info->td_queue; | |
1054 | ||
717d8181 | 1055 | ret = init_cppi41(dev, cdd); |
9b3452d1 SAS |
1056 | if (ret) |
1057 | goto err_init_cppi; | |
1058 | ||
717d8181 | 1059 | ret = cppi41_add_chans(dev, cdd); |
9b3452d1 SAS |
1060 | if (ret) |
1061 | goto err_chans; | |
1062 | ||
717d8181 | 1063 | irq = irq_of_parse_and_map(dev->of_node, 0); |
f3b77727 JL |
1064 | if (!irq) { |
1065 | ret = -EINVAL; | |
9b3452d1 | 1066 | goto err_irq; |
f3b77727 | 1067 | } |
9b3452d1 SAS |
1068 | |
1069 | cppi_writel(USBSS_IRQ_PD_COMP, cdd->usbss_mem + USBSS_IRQ_ENABLER); | |
1070 | ||
f0f3b5fa | 1071 | ret = devm_request_irq(&pdev->dev, irq, glue_info->isr, IRQF_SHARED, |
717d8181 | 1072 | dev_name(dev), cdd); |
9b3452d1 SAS |
1073 | if (ret) |
1074 | goto err_irq; | |
1075 | cdd->irq = irq; | |
1076 | ||
1077 | ret = dma_async_device_register(&cdd->ddev); | |
1078 | if (ret) | |
1079 | goto err_dma_reg; | |
1080 | ||
717d8181 | 1081 | ret = of_dma_controller_register(dev->of_node, |
9b3452d1 SAS |
1082 | cppi41_dma_xlate, &cpp41_dma_info); |
1083 | if (ret) | |
1084 | goto err_of; | |
1085 | ||
fdea2d09 TL |
1086 | pm_runtime_mark_last_busy(dev); |
1087 | pm_runtime_put_autosuspend(dev); | |
1088 | ||
9b3452d1 SAS |
1089 | return 0; |
1090 | err_of: | |
1091 | dma_async_device_unregister(&cdd->ddev); | |
1092 | err_dma_reg: | |
9b3452d1 SAS |
1093 | err_irq: |
1094 | cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR); | |
1095 | cleanup_chans(cdd); | |
1096 | err_chans: | |
717d8181 | 1097 | deinit_cppi41(dev, cdd); |
9b3452d1 | 1098 | err_init_cppi: |
fdea2d09 | 1099 | pm_runtime_dont_use_autosuspend(dev); |
d6aafa2b | 1100 | err_get_sync: |
d5afc1b6 | 1101 | pm_runtime_put_sync(dev); |
717d8181 | 1102 | pm_runtime_disable(dev); |
9b3452d1 SAS |
1103 | iounmap(cdd->usbss_mem); |
1104 | iounmap(cdd->ctrl_mem); | |
1105 | iounmap(cdd->sched_mem); | |
1106 | iounmap(cdd->qmgr_mem); | |
9b3452d1 SAS |
1107 | return ret; |
1108 | } | |
1109 | ||
1110 | static int cppi41_dma_remove(struct platform_device *pdev) | |
1111 | { | |
1112 | struct cppi41_dd *cdd = platform_get_drvdata(pdev); | |
12f59080 | 1113 | int error; |
9b3452d1 | 1114 | |
12f59080 TL |
1115 | error = pm_runtime_get_sync(&pdev->dev); |
1116 | if (error < 0) | |
1117 | dev_err(&pdev->dev, "%s could not pm_runtime_get: %i\n", | |
1118 | __func__, error); | |
9b3452d1 SAS |
1119 | of_dma_controller_free(pdev->dev.of_node); |
1120 | dma_async_device_unregister(&cdd->ddev); | |
1121 | ||
1122 | cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR); | |
f0f3b5fa | 1123 | devm_free_irq(&pdev->dev, cdd->irq, cdd); |
9b3452d1 | 1124 | cleanup_chans(cdd); |
b46ce4d0 | 1125 | deinit_cppi41(&pdev->dev, cdd); |
9b3452d1 SAS |
1126 | iounmap(cdd->usbss_mem); |
1127 | iounmap(cdd->ctrl_mem); | |
1128 | iounmap(cdd->sched_mem); | |
1129 | iounmap(cdd->qmgr_mem); | |
fdea2d09 TL |
1130 | pm_runtime_dont_use_autosuspend(&pdev->dev); |
1131 | pm_runtime_put_sync(&pdev->dev); | |
d6aafa2b | 1132 | pm_runtime_disable(&pdev->dev); |
9b3452d1 SAS |
1133 | return 0; |
1134 | } | |
1135 | ||
522ef614 | 1136 | static int __maybe_unused cppi41_suspend(struct device *dev) |
f97b98d6 DM |
1137 | { |
1138 | struct cppi41_dd *cdd = dev_get_drvdata(dev); | |
1139 | ||
f8964968 | 1140 | cdd->dma_tdfdq = cppi_readl(cdd->ctrl_mem + DMA_TDFDQ); |
f97b98d6 DM |
1141 | cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR); |
1142 | disable_sched(cdd); | |
1143 | ||
1144 | return 0; | |
1145 | } | |
1146 | ||
522ef614 | 1147 | static int __maybe_unused cppi41_resume(struct device *dev) |
f97b98d6 DM |
1148 | { |
1149 | struct cppi41_dd *cdd = dev_get_drvdata(dev); | |
f8964968 | 1150 | struct cppi41_channel *c; |
f97b98d6 DM |
1151 | int i; |
1152 | ||
1153 | for (i = 0; i < DESCS_AREAS; i++) | |
1154 | cppi_writel(cdd->descs_phys, cdd->qmgr_mem + QMGR_MEMBASE(i)); | |
1155 | ||
f8964968 DM |
1156 | list_for_each_entry(c, &cdd->ddev.channels, chan.device_node) |
1157 | if (!c->is_tx) | |
1158 | cppi_writel(c->q_num, c->gcr_reg + RXHPCRA0); | |
1159 | ||
f97b98d6 | 1160 | init_sched(cdd); |
f8964968 DM |
1161 | |
1162 | cppi_writel(cdd->dma_tdfdq, cdd->ctrl_mem + DMA_TDFDQ); | |
1163 | cppi_writel(cdd->scratch_phys, cdd->qmgr_mem + QMGR_LRAM0_BASE); | |
1164 | cppi_writel(QMGR_SCRATCH_SIZE, cdd->qmgr_mem + QMGR_LRAM_SIZE); | |
1165 | cppi_writel(0, cdd->qmgr_mem + QMGR_LRAM1_BASE); | |
1166 | ||
f97b98d6 DM |
1167 | cppi_writel(USBSS_IRQ_PD_COMP, cdd->usbss_mem + USBSS_IRQ_ENABLER); |
1168 | ||
1169 | return 0; | |
1170 | } | |
fdea2d09 | 1171 | |
522ef614 | 1172 | static int __maybe_unused cppi41_runtime_suspend(struct device *dev) |
fdea2d09 TL |
1173 | { |
1174 | struct cppi41_dd *cdd = dev_get_drvdata(dev); | |
362f4562 | 1175 | unsigned long flags; |
fdea2d09 | 1176 | |
362f4562 TL |
1177 | spin_lock_irqsave(&cdd->lock, flags); |
1178 | cdd->is_suspended = true; | |
fdea2d09 | 1179 | WARN_ON(!list_empty(&cdd->pending)); |
362f4562 | 1180 | spin_unlock_irqrestore(&cdd->lock, flags); |
fdea2d09 TL |
1181 | |
1182 | return 0; | |
1183 | } | |
1184 | ||
522ef614 | 1185 | static int __maybe_unused cppi41_runtime_resume(struct device *dev) |
fdea2d09 TL |
1186 | { |
1187 | struct cppi41_dd *cdd = dev_get_drvdata(dev); | |
fdea2d09 TL |
1188 | unsigned long flags; |
1189 | ||
1190 | spin_lock_irqsave(&cdd->lock, flags); | |
362f4562 TL |
1191 | cdd->is_suspended = false; |
1192 | cppi41_run_queue(cdd); | |
fdea2d09 TL |
1193 | spin_unlock_irqrestore(&cdd->lock, flags); |
1194 | ||
1195 | return 0; | |
1196 | } | |
f97b98d6 | 1197 | |
fdea2d09 TL |
1198 | static const struct dev_pm_ops cppi41_pm_ops = { |
1199 | SET_LATE_SYSTEM_SLEEP_PM_OPS(cppi41_suspend, cppi41_resume) | |
1200 | SET_RUNTIME_PM_OPS(cppi41_runtime_suspend, | |
1201 | cppi41_runtime_resume, | |
1202 | NULL) | |
1203 | }; | |
f97b98d6 | 1204 | |
9b3452d1 SAS |
1205 | static struct platform_driver cpp41_dma_driver = { |
1206 | .probe = cppi41_dma_probe, | |
1207 | .remove = cppi41_dma_remove, | |
1208 | .driver = { | |
1209 | .name = "cppi41-dma-engine", | |
f97b98d6 | 1210 | .pm = &cppi41_pm_ops, |
9b3452d1 SAS |
1211 | .of_match_table = of_match_ptr(cppi41_dma_ids), |
1212 | }, | |
1213 | }; | |
1214 | ||
1215 | module_platform_driver(cpp41_dma_driver); | |
1216 | MODULE_LICENSE("GPL"); | |
1217 | MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>"); |