Commit | Line | Data |
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8d318a50 | 1 | /* |
767a9675 | 2 | * Copyright (C) ST-Ericsson SA 2007-2010 |
661385f9 | 3 | * Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson |
767a9675 | 4 | * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson |
8d318a50 | 5 | * License terms: GNU General Public License (GPL) version 2 |
8d318a50 LW |
6 | */ |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/slab.h> | |
10 | #include <linux/dmaengine.h> | |
11 | #include <linux/platform_device.h> | |
12 | #include <linux/clk.h> | |
13 | #include <linux/delay.h> | |
698e4732 | 14 | #include <linux/err.h> |
8d318a50 LW |
15 | |
16 | #include <plat/ste_dma40.h> | |
17 | ||
18 | #include "ste_dma40_ll.h" | |
19 | ||
20 | #define D40_NAME "dma40" | |
21 | ||
22 | #define D40_PHY_CHAN -1 | |
23 | ||
24 | /* For masking out/in 2 bit channel positions */ | |
25 | #define D40_CHAN_POS(chan) (2 * (chan / 2)) | |
26 | #define D40_CHAN_POS_MASK(chan) (0x3 << D40_CHAN_POS(chan)) | |
27 | ||
28 | /* Maximum iterations taken before giving up suspending a channel */ | |
29 | #define D40_SUSPEND_MAX_IT 500 | |
30 | ||
508849ad LW |
31 | /* Hardware requirement on LCLA alignment */ |
32 | #define LCLA_ALIGNMENT 0x40000 | |
698e4732 JA |
33 | |
34 | /* Max number of links per event group */ | |
35 | #define D40_LCLA_LINK_PER_EVENT_GRP 128 | |
36 | #define D40_LCLA_END D40_LCLA_LINK_PER_EVENT_GRP | |
37 | ||
508849ad LW |
38 | /* Attempts before giving up to trying to get pages that are aligned */ |
39 | #define MAX_LCLA_ALLOC_ATTEMPTS 256 | |
40 | ||
41 | /* Bit markings for allocation map */ | |
8d318a50 LW |
42 | #define D40_ALLOC_FREE (1 << 31) |
43 | #define D40_ALLOC_PHY (1 << 30) | |
44 | #define D40_ALLOC_LOG_FREE 0 | |
45 | ||
8d318a50 | 46 | /* Hardware designer of the block */ |
3ae0267f | 47 | #define D40_HW_DESIGNER 0x8 |
8d318a50 LW |
48 | |
49 | /** | |
50 | * enum 40_command - The different commands and/or statuses. | |
51 | * | |
52 | * @D40_DMA_STOP: DMA channel command STOP or status STOPPED, | |
53 | * @D40_DMA_RUN: The DMA channel is RUNNING of the command RUN. | |
54 | * @D40_DMA_SUSPEND_REQ: Request the DMA to SUSPEND as soon as possible. | |
55 | * @D40_DMA_SUSPENDED: The DMA channel is SUSPENDED. | |
56 | */ | |
57 | enum d40_command { | |
58 | D40_DMA_STOP = 0, | |
59 | D40_DMA_RUN = 1, | |
60 | D40_DMA_SUSPEND_REQ = 2, | |
61 | D40_DMA_SUSPENDED = 3 | |
62 | }; | |
63 | ||
64 | /** | |
65 | * struct d40_lli_pool - Structure for keeping LLIs in memory | |
66 | * | |
67 | * @base: Pointer to memory area when the pre_alloc_lli's are not large | |
68 | * enough, IE bigger than the most common case, 1 dst and 1 src. NULL if | |
69 | * pre_alloc_lli is used. | |
70 | * @size: The size in bytes of the memory at base or the size of pre_alloc_lli. | |
71 | * @pre_alloc_lli: Pre allocated area for the most common case of transfers, | |
72 | * one buffer to one buffer. | |
73 | */ | |
74 | struct d40_lli_pool { | |
75 | void *base; | |
508849ad | 76 | int size; |
8d318a50 | 77 | /* Space for dst and src, plus an extra for padding */ |
508849ad | 78 | u8 pre_alloc_lli[3 * sizeof(struct d40_phy_lli)]; |
8d318a50 LW |
79 | }; |
80 | ||
81 | /** | |
82 | * struct d40_desc - A descriptor is one DMA job. | |
83 | * | |
84 | * @lli_phy: LLI settings for physical channel. Both src and dst= | |
85 | * points into the lli_pool, to base if lli_len > 1 or to pre_alloc_lli if | |
86 | * lli_len equals one. | |
87 | * @lli_log: Same as above but for logical channels. | |
88 | * @lli_pool: The pool with two entries pre-allocated. | |
941b77a3 | 89 | * @lli_len: Number of llis of current descriptor. |
698e4732 JA |
90 | * @lli_current: Number of transfered llis. |
91 | * @lcla_alloc: Number of LCLA entries allocated. | |
8d318a50 LW |
92 | * @txd: DMA engine struct. Used for among other things for communication |
93 | * during a transfer. | |
94 | * @node: List entry. | |
8d318a50 | 95 | * @is_in_client_list: true if the client owns this descriptor. |
aa182ae2 JA |
96 | * @is_hw_linked: true if this job will automatically be continued for |
97 | * the previous one. | |
8d318a50 LW |
98 | * |
99 | * This descriptor is used for both logical and physical transfers. | |
100 | */ | |
8d318a50 LW |
101 | struct d40_desc { |
102 | /* LLI physical */ | |
103 | struct d40_phy_lli_bidir lli_phy; | |
104 | /* LLI logical */ | |
105 | struct d40_log_lli_bidir lli_log; | |
106 | ||
107 | struct d40_lli_pool lli_pool; | |
941b77a3 | 108 | int lli_len; |
698e4732 JA |
109 | int lli_current; |
110 | int lcla_alloc; | |
8d318a50 LW |
111 | |
112 | struct dma_async_tx_descriptor txd; | |
113 | struct list_head node; | |
114 | ||
8d318a50 | 115 | bool is_in_client_list; |
aa182ae2 | 116 | bool is_hw_linked; |
8d318a50 LW |
117 | }; |
118 | ||
119 | /** | |
120 | * struct d40_lcla_pool - LCLA pool settings and data. | |
121 | * | |
508849ad LW |
122 | * @base: The virtual address of LCLA. 18 bit aligned. |
123 | * @base_unaligned: The orignal kmalloc pointer, if kmalloc is used. | |
124 | * This pointer is only there for clean-up on error. | |
125 | * @pages: The number of pages needed for all physical channels. | |
126 | * Only used later for clean-up on error | |
8d318a50 | 127 | * @lock: Lock to protect the content in this struct. |
698e4732 | 128 | * @alloc_map: big map over which LCLA entry is own by which job. |
8d318a50 LW |
129 | */ |
130 | struct d40_lcla_pool { | |
131 | void *base; | |
508849ad LW |
132 | void *base_unaligned; |
133 | int pages; | |
8d318a50 | 134 | spinlock_t lock; |
698e4732 | 135 | struct d40_desc **alloc_map; |
8d318a50 LW |
136 | }; |
137 | ||
138 | /** | |
139 | * struct d40_phy_res - struct for handling eventlines mapped to physical | |
140 | * channels. | |
141 | * | |
142 | * @lock: A lock protection this entity. | |
143 | * @num: The physical channel number of this entity. | |
144 | * @allocated_src: Bit mapped to show which src event line's are mapped to | |
145 | * this physical channel. Can also be free or physically allocated. | |
146 | * @allocated_dst: Same as for src but is dst. | |
147 | * allocated_dst and allocated_src uses the D40_ALLOC* defines as well as | |
767a9675 | 148 | * event line number. |
8d318a50 LW |
149 | */ |
150 | struct d40_phy_res { | |
151 | spinlock_t lock; | |
152 | int num; | |
153 | u32 allocated_src; | |
154 | u32 allocated_dst; | |
155 | }; | |
156 | ||
157 | struct d40_base; | |
158 | ||
159 | /** | |
160 | * struct d40_chan - Struct that describes a channel. | |
161 | * | |
162 | * @lock: A spinlock to protect this struct. | |
163 | * @log_num: The logical number, if any of this channel. | |
164 | * @completed: Starts with 1, after first interrupt it is set to dma engine's | |
165 | * current cookie. | |
166 | * @pending_tx: The number of pending transfers. Used between interrupt handler | |
167 | * and tasklet. | |
168 | * @busy: Set to true when transfer is ongoing on this channel. | |
2a614340 JA |
169 | * @phy_chan: Pointer to physical channel which this instance runs on. If this |
170 | * point is NULL, then the channel is not allocated. | |
8d318a50 LW |
171 | * @chan: DMA engine handle. |
172 | * @tasklet: Tasklet that gets scheduled from interrupt context to complete a | |
173 | * transfer and call client callback. | |
174 | * @client: Cliented owned descriptor list. | |
175 | * @active: Active descriptor. | |
176 | * @queue: Queued jobs. | |
8d318a50 LW |
177 | * @dma_cfg: The client configuration of this dma channel. |
178 | * @base: Pointer to the device instance struct. | |
179 | * @src_def_cfg: Default cfg register setting for src. | |
180 | * @dst_def_cfg: Default cfg register setting for dst. | |
181 | * @log_def: Default logical channel settings. | |
182 | * @lcla: Space for one dst src pair for logical channel transfers. | |
183 | * @lcpa: Pointer to dst and src lcpa settings. | |
184 | * | |
185 | * This struct can either "be" a logical or a physical channel. | |
186 | */ | |
187 | struct d40_chan { | |
188 | spinlock_t lock; | |
189 | int log_num; | |
190 | /* ID of the most recent completed transfer */ | |
191 | int completed; | |
192 | int pending_tx; | |
193 | bool busy; | |
194 | struct d40_phy_res *phy_chan; | |
195 | struct dma_chan chan; | |
196 | struct tasklet_struct tasklet; | |
197 | struct list_head client; | |
198 | struct list_head active; | |
199 | struct list_head queue; | |
8d318a50 LW |
200 | struct stedma40_chan_cfg dma_cfg; |
201 | struct d40_base *base; | |
202 | /* Default register configurations */ | |
203 | u32 src_def_cfg; | |
204 | u32 dst_def_cfg; | |
205 | struct d40_def_lcsp log_def; | |
8d318a50 | 206 | struct d40_log_lli_full *lcpa; |
95e1400f LW |
207 | /* Runtime reconfiguration */ |
208 | dma_addr_t runtime_addr; | |
209 | enum dma_data_direction runtime_direction; | |
8d318a50 LW |
210 | }; |
211 | ||
212 | /** | |
213 | * struct d40_base - The big global struct, one for each probe'd instance. | |
214 | * | |
215 | * @interrupt_lock: Lock used to make sure one interrupt is handle a time. | |
216 | * @execmd_lock: Lock for execute command usage since several channels share | |
217 | * the same physical register. | |
218 | * @dev: The device structure. | |
219 | * @virtbase: The virtual base address of the DMA's register. | |
f4185592 | 220 | * @rev: silicon revision detected. |
8d318a50 LW |
221 | * @clk: Pointer to the DMA clock structure. |
222 | * @phy_start: Physical memory start of the DMA registers. | |
223 | * @phy_size: Size of the DMA register map. | |
224 | * @irq: The IRQ number. | |
225 | * @num_phy_chans: The number of physical channels. Read from HW. This | |
226 | * is the number of available channels for this driver, not counting "Secure | |
227 | * mode" allocated physical channels. | |
228 | * @num_log_chans: The number of logical channels. Calculated from | |
229 | * num_phy_chans. | |
230 | * @dma_both: dma_device channels that can do both memcpy and slave transfers. | |
231 | * @dma_slave: dma_device channels that can do only do slave transfers. | |
232 | * @dma_memcpy: dma_device channels that can do only do memcpy transfers. | |
8d318a50 LW |
233 | * @log_chans: Room for all possible logical channels in system. |
234 | * @lookup_log_chans: Used to map interrupt number to logical channel. Points | |
235 | * to log_chans entries. | |
236 | * @lookup_phy_chans: Used to map interrupt number to physical channel. Points | |
237 | * to phy_chans entries. | |
238 | * @plat_data: Pointer to provided platform_data which is the driver | |
239 | * configuration. | |
240 | * @phy_res: Vector containing all physical channels. | |
241 | * @lcla_pool: lcla pool settings and data. | |
242 | * @lcpa_base: The virtual mapped address of LCPA. | |
243 | * @phy_lcpa: The physical address of the LCPA. | |
244 | * @lcpa_size: The size of the LCPA area. | |
c675b1b4 | 245 | * @desc_slab: cache for descriptors. |
8d318a50 LW |
246 | */ |
247 | struct d40_base { | |
248 | spinlock_t interrupt_lock; | |
249 | spinlock_t execmd_lock; | |
250 | struct device *dev; | |
251 | void __iomem *virtbase; | |
f4185592 | 252 | u8 rev:4; |
8d318a50 LW |
253 | struct clk *clk; |
254 | phys_addr_t phy_start; | |
255 | resource_size_t phy_size; | |
256 | int irq; | |
257 | int num_phy_chans; | |
258 | int num_log_chans; | |
259 | struct dma_device dma_both; | |
260 | struct dma_device dma_slave; | |
261 | struct dma_device dma_memcpy; | |
262 | struct d40_chan *phy_chans; | |
263 | struct d40_chan *log_chans; | |
264 | struct d40_chan **lookup_log_chans; | |
265 | struct d40_chan **lookup_phy_chans; | |
266 | struct stedma40_platform_data *plat_data; | |
267 | /* Physical half channels */ | |
268 | struct d40_phy_res *phy_res; | |
269 | struct d40_lcla_pool lcla_pool; | |
270 | void *lcpa_base; | |
271 | dma_addr_t phy_lcpa; | |
272 | resource_size_t lcpa_size; | |
c675b1b4 | 273 | struct kmem_cache *desc_slab; |
8d318a50 LW |
274 | }; |
275 | ||
276 | /** | |
277 | * struct d40_interrupt_lookup - lookup table for interrupt handler | |
278 | * | |
279 | * @src: Interrupt mask register. | |
280 | * @clr: Interrupt clear register. | |
281 | * @is_error: true if this is an error interrupt. | |
282 | * @offset: start delta in the lookup_log_chans in d40_base. If equals to | |
283 | * D40_PHY_CHAN, the lookup_phy_chans shall be used instead. | |
284 | */ | |
285 | struct d40_interrupt_lookup { | |
286 | u32 src; | |
287 | u32 clr; | |
288 | bool is_error; | |
289 | int offset; | |
290 | }; | |
291 | ||
292 | /** | |
293 | * struct d40_reg_val - simple lookup struct | |
294 | * | |
295 | * @reg: The register. | |
296 | * @val: The value that belongs to the register in reg. | |
297 | */ | |
298 | struct d40_reg_val { | |
299 | unsigned int reg; | |
300 | unsigned int val; | |
301 | }; | |
302 | ||
303 | static int d40_pool_lli_alloc(struct d40_desc *d40d, | |
304 | int lli_len, bool is_log) | |
305 | { | |
306 | u32 align; | |
307 | void *base; | |
308 | ||
309 | if (is_log) | |
310 | align = sizeof(struct d40_log_lli); | |
311 | else | |
312 | align = sizeof(struct d40_phy_lli); | |
313 | ||
314 | if (lli_len == 1) { | |
315 | base = d40d->lli_pool.pre_alloc_lli; | |
316 | d40d->lli_pool.size = sizeof(d40d->lli_pool.pre_alloc_lli); | |
317 | d40d->lli_pool.base = NULL; | |
318 | } else { | |
319 | d40d->lli_pool.size = ALIGN(lli_len * 2 * align, align); | |
320 | ||
321 | base = kmalloc(d40d->lli_pool.size + align, GFP_NOWAIT); | |
322 | d40d->lli_pool.base = base; | |
323 | ||
324 | if (d40d->lli_pool.base == NULL) | |
325 | return -ENOMEM; | |
326 | } | |
327 | ||
328 | if (is_log) { | |
329 | d40d->lli_log.src = PTR_ALIGN((struct d40_log_lli *) base, | |
330 | align); | |
331 | d40d->lli_log.dst = PTR_ALIGN(d40d->lli_log.src + lli_len, | |
332 | align); | |
333 | } else { | |
334 | d40d->lli_phy.src = PTR_ALIGN((struct d40_phy_lli *)base, | |
335 | align); | |
336 | d40d->lli_phy.dst = PTR_ALIGN(d40d->lli_phy.src + lli_len, | |
337 | align); | |
8d318a50 LW |
338 | } |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
343 | static void d40_pool_lli_free(struct d40_desc *d40d) | |
344 | { | |
345 | kfree(d40d->lli_pool.base); | |
346 | d40d->lli_pool.base = NULL; | |
347 | d40d->lli_pool.size = 0; | |
348 | d40d->lli_log.src = NULL; | |
349 | d40d->lli_log.dst = NULL; | |
350 | d40d->lli_phy.src = NULL; | |
351 | d40d->lli_phy.dst = NULL; | |
8d318a50 LW |
352 | } |
353 | ||
698e4732 JA |
354 | static int d40_lcla_alloc_one(struct d40_chan *d40c, |
355 | struct d40_desc *d40d) | |
356 | { | |
357 | unsigned long flags; | |
358 | int i; | |
359 | int ret = -EINVAL; | |
360 | int p; | |
361 | ||
362 | spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags); | |
363 | ||
364 | p = d40c->phy_chan->num * D40_LCLA_LINK_PER_EVENT_GRP; | |
365 | ||
366 | /* | |
367 | * Allocate both src and dst at the same time, therefore the half | |
368 | * start on 1 since 0 can't be used since zero is used as end marker. | |
369 | */ | |
370 | for (i = 1 ; i < D40_LCLA_LINK_PER_EVENT_GRP / 2; i++) { | |
371 | if (!d40c->base->lcla_pool.alloc_map[p + i]) { | |
372 | d40c->base->lcla_pool.alloc_map[p + i] = d40d; | |
373 | d40d->lcla_alloc++; | |
374 | ret = i; | |
375 | break; | |
376 | } | |
377 | } | |
378 | ||
379 | spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags); | |
380 | ||
381 | return ret; | |
382 | } | |
383 | ||
384 | static int d40_lcla_free_all(struct d40_chan *d40c, | |
385 | struct d40_desc *d40d) | |
386 | { | |
387 | unsigned long flags; | |
388 | int i; | |
389 | int ret = -EINVAL; | |
390 | ||
391 | if (d40c->log_num == D40_PHY_CHAN) | |
392 | return 0; | |
393 | ||
394 | spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags); | |
395 | ||
396 | for (i = 1 ; i < D40_LCLA_LINK_PER_EVENT_GRP / 2; i++) { | |
397 | if (d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num * | |
398 | D40_LCLA_LINK_PER_EVENT_GRP + i] == d40d) { | |
399 | d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num * | |
400 | D40_LCLA_LINK_PER_EVENT_GRP + i] = NULL; | |
401 | d40d->lcla_alloc--; | |
402 | if (d40d->lcla_alloc == 0) { | |
403 | ret = 0; | |
404 | break; | |
405 | } | |
406 | } | |
407 | } | |
408 | ||
409 | spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags); | |
410 | ||
411 | return ret; | |
412 | ||
413 | } | |
414 | ||
8d318a50 LW |
415 | static void d40_desc_remove(struct d40_desc *d40d) |
416 | { | |
417 | list_del(&d40d->node); | |
418 | } | |
419 | ||
420 | static struct d40_desc *d40_desc_get(struct d40_chan *d40c) | |
421 | { | |
a2c15fa4 | 422 | struct d40_desc *desc = NULL; |
8d318a50 LW |
423 | |
424 | if (!list_empty(&d40c->client)) { | |
a2c15fa4 RV |
425 | struct d40_desc *d; |
426 | struct d40_desc *_d; | |
427 | ||
8d318a50 LW |
428 | list_for_each_entry_safe(d, _d, &d40c->client, node) |
429 | if (async_tx_test_ack(&d->txd)) { | |
430 | d40_pool_lli_free(d); | |
431 | d40_desc_remove(d); | |
a2c15fa4 RV |
432 | desc = d; |
433 | memset(desc, 0, sizeof(*desc)); | |
c675b1b4 | 434 | break; |
8d318a50 | 435 | } |
8d318a50 | 436 | } |
a2c15fa4 RV |
437 | |
438 | if (!desc) | |
439 | desc = kmem_cache_zalloc(d40c->base->desc_slab, GFP_NOWAIT); | |
440 | ||
441 | if (desc) | |
442 | INIT_LIST_HEAD(&desc->node); | |
443 | ||
444 | return desc; | |
8d318a50 LW |
445 | } |
446 | ||
447 | static void d40_desc_free(struct d40_chan *d40c, struct d40_desc *d40d) | |
448 | { | |
698e4732 JA |
449 | |
450 | d40_lcla_free_all(d40c, d40d); | |
c675b1b4 | 451 | kmem_cache_free(d40c->base->desc_slab, d40d); |
8d318a50 LW |
452 | } |
453 | ||
454 | static void d40_desc_submit(struct d40_chan *d40c, struct d40_desc *desc) | |
455 | { | |
456 | list_add_tail(&desc->node, &d40c->active); | |
457 | } | |
458 | ||
698e4732 JA |
459 | static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d) |
460 | { | |
461 | int curr_lcla = -EINVAL, next_lcla; | |
462 | ||
463 | if (d40c->log_num == D40_PHY_CHAN) { | |
464 | d40_phy_lli_write(d40c->base->virtbase, | |
465 | d40c->phy_chan->num, | |
466 | d40d->lli_phy.dst, | |
467 | d40d->lli_phy.src); | |
468 | d40d->lli_current = d40d->lli_len; | |
469 | } else { | |
470 | ||
471 | if ((d40d->lli_len - d40d->lli_current) > 1) | |
472 | curr_lcla = d40_lcla_alloc_one(d40c, d40d); | |
473 | ||
474 | d40_log_lli_lcpa_write(d40c->lcpa, | |
475 | &d40d->lli_log.dst[d40d->lli_current], | |
476 | &d40d->lli_log.src[d40d->lli_current], | |
477 | curr_lcla); | |
478 | ||
479 | d40d->lli_current++; | |
480 | for (; d40d->lli_current < d40d->lli_len; d40d->lli_current++) { | |
481 | struct d40_log_lli *lcla; | |
482 | ||
483 | if (d40d->lli_current + 1 < d40d->lli_len) | |
484 | next_lcla = d40_lcla_alloc_one(d40c, d40d); | |
485 | else | |
486 | next_lcla = -EINVAL; | |
487 | ||
488 | lcla = d40c->base->lcla_pool.base + | |
489 | d40c->phy_chan->num * 1024 + | |
490 | 8 * curr_lcla * 2; | |
491 | ||
492 | d40_log_lli_lcla_write(lcla, | |
493 | &d40d->lli_log.dst[d40d->lli_current], | |
494 | &d40d->lli_log.src[d40d->lli_current], | |
495 | next_lcla); | |
496 | ||
497 | (void) dma_map_single(d40c->base->dev, lcla, | |
498 | 2 * sizeof(struct d40_log_lli), | |
499 | DMA_TO_DEVICE); | |
500 | ||
501 | curr_lcla = next_lcla; | |
502 | ||
503 | if (curr_lcla == -EINVAL) { | |
504 | d40d->lli_current++; | |
505 | break; | |
506 | } | |
507 | ||
508 | } | |
509 | } | |
510 | } | |
511 | ||
8d318a50 LW |
512 | static struct d40_desc *d40_first_active_get(struct d40_chan *d40c) |
513 | { | |
514 | struct d40_desc *d; | |
515 | ||
516 | if (list_empty(&d40c->active)) | |
517 | return NULL; | |
518 | ||
519 | d = list_first_entry(&d40c->active, | |
520 | struct d40_desc, | |
521 | node); | |
522 | return d; | |
523 | } | |
524 | ||
525 | static void d40_desc_queue(struct d40_chan *d40c, struct d40_desc *desc) | |
526 | { | |
527 | list_add_tail(&desc->node, &d40c->queue); | |
528 | } | |
529 | ||
530 | static struct d40_desc *d40_first_queued(struct d40_chan *d40c) | |
531 | { | |
532 | struct d40_desc *d; | |
533 | ||
534 | if (list_empty(&d40c->queue)) | |
535 | return NULL; | |
536 | ||
537 | d = list_first_entry(&d40c->queue, | |
538 | struct d40_desc, | |
539 | node); | |
540 | return d; | |
541 | } | |
542 | ||
aa182ae2 JA |
543 | static struct d40_desc *d40_last_queued(struct d40_chan *d40c) |
544 | { | |
545 | struct d40_desc *d; | |
546 | ||
547 | if (list_empty(&d40c->queue)) | |
548 | return NULL; | |
549 | list_for_each_entry(d, &d40c->queue, node) | |
550 | if (list_is_last(&d->node, &d40c->queue)) | |
551 | break; | |
552 | return d; | |
553 | } | |
554 | ||
8d318a50 LW |
555 | /* Support functions for logical channels */ |
556 | ||
8d318a50 LW |
557 | |
558 | static int d40_channel_execute_command(struct d40_chan *d40c, | |
559 | enum d40_command command) | |
560 | { | |
767a9675 JA |
561 | u32 status; |
562 | int i; | |
8d318a50 LW |
563 | void __iomem *active_reg; |
564 | int ret = 0; | |
565 | unsigned long flags; | |
1d392a7b | 566 | u32 wmask; |
8d318a50 LW |
567 | |
568 | spin_lock_irqsave(&d40c->base->execmd_lock, flags); | |
569 | ||
570 | if (d40c->phy_chan->num % 2 == 0) | |
571 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVE; | |
572 | else | |
573 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVO; | |
574 | ||
575 | if (command == D40_DMA_SUSPEND_REQ) { | |
576 | status = (readl(active_reg) & | |
577 | D40_CHAN_POS_MASK(d40c->phy_chan->num)) >> | |
578 | D40_CHAN_POS(d40c->phy_chan->num); | |
579 | ||
580 | if (status == D40_DMA_SUSPENDED || status == D40_DMA_STOP) | |
581 | goto done; | |
582 | } | |
583 | ||
1d392a7b JA |
584 | wmask = 0xffffffff & ~(D40_CHAN_POS_MASK(d40c->phy_chan->num)); |
585 | writel(wmask | (command << D40_CHAN_POS(d40c->phy_chan->num)), | |
586 | active_reg); | |
8d318a50 LW |
587 | |
588 | if (command == D40_DMA_SUSPEND_REQ) { | |
589 | ||
590 | for (i = 0 ; i < D40_SUSPEND_MAX_IT; i++) { | |
591 | status = (readl(active_reg) & | |
592 | D40_CHAN_POS_MASK(d40c->phy_chan->num)) >> | |
593 | D40_CHAN_POS(d40c->phy_chan->num); | |
594 | ||
595 | cpu_relax(); | |
596 | /* | |
597 | * Reduce the number of bus accesses while | |
598 | * waiting for the DMA to suspend. | |
599 | */ | |
600 | udelay(3); | |
601 | ||
602 | if (status == D40_DMA_STOP || | |
603 | status == D40_DMA_SUSPENDED) | |
604 | break; | |
605 | } | |
606 | ||
607 | if (i == D40_SUSPEND_MAX_IT) { | |
608 | dev_err(&d40c->chan.dev->device, | |
609 | "[%s]: unable to suspend the chl %d (log: %d) status %x\n", | |
610 | __func__, d40c->phy_chan->num, d40c->log_num, | |
611 | status); | |
612 | dump_stack(); | |
613 | ret = -EBUSY; | |
614 | } | |
615 | ||
616 | } | |
617 | done: | |
618 | spin_unlock_irqrestore(&d40c->base->execmd_lock, flags); | |
619 | return ret; | |
620 | } | |
621 | ||
622 | static void d40_term_all(struct d40_chan *d40c) | |
623 | { | |
624 | struct d40_desc *d40d; | |
8d318a50 LW |
625 | |
626 | /* Release active descriptors */ | |
627 | while ((d40d = d40_first_active_get(d40c))) { | |
628 | d40_desc_remove(d40d); | |
8d318a50 LW |
629 | d40_desc_free(d40c, d40d); |
630 | } | |
631 | ||
632 | /* Release queued descriptors waiting for transfer */ | |
633 | while ((d40d = d40_first_queued(d40c))) { | |
634 | d40_desc_remove(d40d); | |
8d318a50 LW |
635 | d40_desc_free(d40c, d40d); |
636 | } | |
637 | ||
8d318a50 LW |
638 | |
639 | d40c->pending_tx = 0; | |
640 | d40c->busy = false; | |
641 | } | |
642 | ||
643 | static void d40_config_set_event(struct d40_chan *d40c, bool do_enable) | |
644 | { | |
645 | u32 val; | |
646 | unsigned long flags; | |
647 | ||
0c32269d | 648 | /* Notice, that disable requires the physical channel to be stopped */ |
8d318a50 LW |
649 | if (do_enable) |
650 | val = D40_ACTIVATE_EVENTLINE; | |
651 | else | |
652 | val = D40_DEACTIVATE_EVENTLINE; | |
653 | ||
654 | spin_lock_irqsave(&d40c->phy_chan->lock, flags); | |
655 | ||
656 | /* Enable event line connected to device (or memcpy) */ | |
657 | if ((d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) || | |
658 | (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_PERIPH)) { | |
659 | u32 event = D40_TYPE_TO_EVENT(d40c->dma_cfg.src_dev_type); | |
660 | ||
661 | writel((val << D40_EVENTLINE_POS(event)) | | |
662 | ~D40_EVENTLINE_MASK(event), | |
663 | d40c->base->virtbase + D40_DREG_PCBASE + | |
664 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
665 | D40_CHAN_REG_SSLNK); | |
666 | } | |
667 | if (d40c->dma_cfg.dir != STEDMA40_PERIPH_TO_MEM) { | |
668 | u32 event = D40_TYPE_TO_EVENT(d40c->dma_cfg.dst_dev_type); | |
669 | ||
670 | writel((val << D40_EVENTLINE_POS(event)) | | |
671 | ~D40_EVENTLINE_MASK(event), | |
672 | d40c->base->virtbase + D40_DREG_PCBASE + | |
673 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
674 | D40_CHAN_REG_SDLNK); | |
675 | } | |
676 | ||
677 | spin_unlock_irqrestore(&d40c->phy_chan->lock, flags); | |
678 | } | |
679 | ||
a5ebca47 | 680 | static u32 d40_chan_has_events(struct d40_chan *d40c) |
8d318a50 | 681 | { |
be8cb7df | 682 | u32 val; |
8d318a50 | 683 | |
be8cb7df JA |
684 | val = readl(d40c->base->virtbase + D40_DREG_PCBASE + |
685 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
686 | D40_CHAN_REG_SSLNK); | |
687 | ||
688 | val |= readl(d40c->base->virtbase + D40_DREG_PCBASE + | |
689 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
690 | D40_CHAN_REG_SDLNK); | |
a5ebca47 | 691 | return val; |
8d318a50 LW |
692 | } |
693 | ||
b55912c6 | 694 | static void d40_config_write(struct d40_chan *d40c) |
8d318a50 LW |
695 | { |
696 | u32 addr_base; | |
697 | u32 var; | |
8d318a50 LW |
698 | |
699 | /* Odd addresses are even addresses + 4 */ | |
700 | addr_base = (d40c->phy_chan->num % 2) * 4; | |
701 | /* Setup channel mode to logical or physical */ | |
702 | var = ((u32)(d40c->log_num != D40_PHY_CHAN) + 1) << | |
703 | D40_CHAN_POS(d40c->phy_chan->num); | |
704 | writel(var, d40c->base->virtbase + D40_DREG_PRMSE + addr_base); | |
705 | ||
706 | /* Setup operational mode option register */ | |
707 | var = ((d40c->dma_cfg.channel_type >> STEDMA40_INFO_CH_MODE_OPT_POS) & | |
708 | 0x3) << D40_CHAN_POS(d40c->phy_chan->num); | |
709 | ||
710 | writel(var, d40c->base->virtbase + D40_DREG_PRMOE + addr_base); | |
711 | ||
712 | if (d40c->log_num != D40_PHY_CHAN) { | |
713 | /* Set default config for CFG reg */ | |
714 | writel(d40c->src_def_cfg, | |
715 | d40c->base->virtbase + D40_DREG_PCBASE + | |
716 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
717 | D40_CHAN_REG_SSCFG); | |
718 | writel(d40c->dst_def_cfg, | |
719 | d40c->base->virtbase + D40_DREG_PCBASE + | |
720 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
721 | D40_CHAN_REG_SDCFG); | |
722 | ||
b55912c6 JA |
723 | /* Set LIDX for lcla */ |
724 | writel((d40c->phy_chan->num << D40_SREG_ELEM_LOG_LIDX_POS) & | |
725 | D40_SREG_ELEM_LOG_LIDX_MASK, | |
726 | d40c->base->virtbase + D40_DREG_PCBASE + | |
727 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
728 | D40_CHAN_REG_SDELT); | |
729 | ||
730 | writel((d40c->phy_chan->num << D40_SREG_ELEM_LOG_LIDX_POS) & | |
731 | D40_SREG_ELEM_LOG_LIDX_MASK, | |
732 | d40c->base->virtbase + D40_DREG_PCBASE + | |
733 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
734 | D40_CHAN_REG_SSELT); | |
735 | ||
8d318a50 | 736 | } |
8d318a50 LW |
737 | } |
738 | ||
aa182ae2 JA |
739 | static u32 d40_residue(struct d40_chan *d40c) |
740 | { | |
741 | u32 num_elt; | |
742 | ||
743 | if (d40c->log_num != D40_PHY_CHAN) | |
744 | num_elt = (readl(&d40c->lcpa->lcsp2) & D40_MEM_LCSP2_ECNT_MASK) | |
745 | >> D40_MEM_LCSP2_ECNT_POS; | |
746 | else | |
747 | num_elt = (readl(d40c->base->virtbase + D40_DREG_PCBASE + | |
748 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
749 | D40_CHAN_REG_SDELT) & | |
750 | D40_SREG_ELEM_PHY_ECNT_MASK) >> | |
751 | D40_SREG_ELEM_PHY_ECNT_POS; | |
752 | return num_elt * (1 << d40c->dma_cfg.dst_info.data_width); | |
753 | } | |
754 | ||
755 | static bool d40_tx_is_linked(struct d40_chan *d40c) | |
756 | { | |
757 | bool is_link; | |
758 | ||
759 | if (d40c->log_num != D40_PHY_CHAN) | |
760 | is_link = readl(&d40c->lcpa->lcsp3) & D40_MEM_LCSP3_DLOS_MASK; | |
761 | else | |
762 | is_link = readl(d40c->base->virtbase + D40_DREG_PCBASE + | |
763 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
764 | D40_CHAN_REG_SDLNK) & | |
765 | D40_SREG_LNK_PHYS_LNK_MASK; | |
766 | return is_link; | |
767 | } | |
768 | ||
769 | static int d40_pause(struct dma_chan *chan) | |
770 | { | |
771 | struct d40_chan *d40c = | |
772 | container_of(chan, struct d40_chan, chan); | |
773 | int res = 0; | |
774 | unsigned long flags; | |
775 | ||
3ac012af JA |
776 | if (!d40c->busy) |
777 | return 0; | |
778 | ||
aa182ae2 JA |
779 | spin_lock_irqsave(&d40c->lock, flags); |
780 | ||
781 | res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ); | |
782 | if (res == 0) { | |
783 | if (d40c->log_num != D40_PHY_CHAN) { | |
784 | d40_config_set_event(d40c, false); | |
785 | /* Resume the other logical channels if any */ | |
786 | if (d40_chan_has_events(d40c)) | |
787 | res = d40_channel_execute_command(d40c, | |
788 | D40_DMA_RUN); | |
789 | } | |
790 | } | |
791 | ||
792 | spin_unlock_irqrestore(&d40c->lock, flags); | |
793 | return res; | |
794 | } | |
795 | ||
796 | static int d40_resume(struct dma_chan *chan) | |
797 | { | |
798 | struct d40_chan *d40c = | |
799 | container_of(chan, struct d40_chan, chan); | |
800 | int res = 0; | |
801 | unsigned long flags; | |
802 | ||
3ac012af JA |
803 | if (!d40c->busy) |
804 | return 0; | |
805 | ||
aa182ae2 JA |
806 | spin_lock_irqsave(&d40c->lock, flags); |
807 | ||
808 | if (d40c->base->rev == 0) | |
809 | if (d40c->log_num != D40_PHY_CHAN) { | |
810 | res = d40_channel_execute_command(d40c, | |
811 | D40_DMA_SUSPEND_REQ); | |
812 | goto no_suspend; | |
813 | } | |
814 | ||
815 | /* If bytes left to transfer or linked tx resume job */ | |
816 | if (d40_residue(d40c) || d40_tx_is_linked(d40c)) { | |
817 | ||
818 | if (d40c->log_num != D40_PHY_CHAN) | |
819 | d40_config_set_event(d40c, true); | |
820 | ||
821 | res = d40_channel_execute_command(d40c, D40_DMA_RUN); | |
822 | } | |
823 | ||
824 | no_suspend: | |
825 | spin_unlock_irqrestore(&d40c->lock, flags); | |
826 | return res; | |
827 | } | |
828 | ||
829 | static void d40_tx_submit_log(struct d40_chan *d40c, struct d40_desc *d40d) | |
830 | { | |
831 | /* TODO: Write */ | |
832 | } | |
833 | ||
834 | static void d40_tx_submit_phy(struct d40_chan *d40c, struct d40_desc *d40d) | |
835 | { | |
836 | struct d40_desc *d40d_prev = NULL; | |
837 | int i; | |
838 | u32 val; | |
839 | ||
840 | if (!list_empty(&d40c->queue)) | |
841 | d40d_prev = d40_last_queued(d40c); | |
842 | else if (!list_empty(&d40c->active)) | |
843 | d40d_prev = d40_first_active_get(d40c); | |
844 | ||
845 | if (!d40d_prev) | |
846 | return; | |
847 | ||
848 | /* Here we try to join this job with previous jobs */ | |
849 | val = readl(d40c->base->virtbase + D40_DREG_PCBASE + | |
850 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
851 | D40_CHAN_REG_SSLNK); | |
852 | ||
853 | /* Figure out which link we're currently transmitting */ | |
854 | for (i = 0; i < d40d_prev->lli_len; i++) | |
855 | if (val == d40d_prev->lli_phy.src[i].reg_lnk) | |
856 | break; | |
857 | ||
858 | val = readl(d40c->base->virtbase + D40_DREG_PCBASE + | |
859 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
860 | D40_CHAN_REG_SSELT) >> D40_SREG_ELEM_LOG_ECNT_POS; | |
861 | ||
862 | if (i == (d40d_prev->lli_len - 1) && val > 0) { | |
863 | /* Change the current one */ | |
864 | writel(virt_to_phys(d40d->lli_phy.src), | |
865 | d40c->base->virtbase + D40_DREG_PCBASE + | |
866 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
867 | D40_CHAN_REG_SSLNK); | |
868 | writel(virt_to_phys(d40d->lli_phy.dst), | |
869 | d40c->base->virtbase + D40_DREG_PCBASE + | |
870 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
871 | D40_CHAN_REG_SDLNK); | |
872 | ||
873 | d40d->is_hw_linked = true; | |
874 | ||
875 | } else if (i < d40d_prev->lli_len) { | |
876 | (void) dma_unmap_single(d40c->base->dev, | |
877 | virt_to_phys(d40d_prev->lli_phy.src), | |
878 | d40d_prev->lli_pool.size, | |
879 | DMA_TO_DEVICE); | |
880 | ||
881 | /* Keep the settings */ | |
882 | val = d40d_prev->lli_phy.src[d40d_prev->lli_len - 1].reg_lnk & | |
883 | ~D40_SREG_LNK_PHYS_LNK_MASK; | |
884 | d40d_prev->lli_phy.src[d40d_prev->lli_len - 1].reg_lnk = | |
885 | val | virt_to_phys(d40d->lli_phy.src); | |
886 | ||
887 | val = d40d_prev->lli_phy.dst[d40d_prev->lli_len - 1].reg_lnk & | |
888 | ~D40_SREG_LNK_PHYS_LNK_MASK; | |
889 | d40d_prev->lli_phy.dst[d40d_prev->lli_len - 1].reg_lnk = | |
890 | val | virt_to_phys(d40d->lli_phy.dst); | |
891 | ||
892 | (void) dma_map_single(d40c->base->dev, | |
893 | d40d_prev->lli_phy.src, | |
894 | d40d_prev->lli_pool.size, | |
895 | DMA_TO_DEVICE); | |
896 | d40d->is_hw_linked = true; | |
897 | } | |
898 | } | |
899 | ||
8d318a50 LW |
900 | static dma_cookie_t d40_tx_submit(struct dma_async_tx_descriptor *tx) |
901 | { | |
902 | struct d40_chan *d40c = container_of(tx->chan, | |
903 | struct d40_chan, | |
904 | chan); | |
905 | struct d40_desc *d40d = container_of(tx, struct d40_desc, txd); | |
906 | unsigned long flags; | |
907 | ||
aa182ae2 JA |
908 | (void) d40_pause(&d40c->chan); |
909 | ||
8d318a50 LW |
910 | spin_lock_irqsave(&d40c->lock, flags); |
911 | ||
aa182ae2 JA |
912 | d40c->chan.cookie++; |
913 | ||
914 | if (d40c->chan.cookie < 0) | |
915 | d40c->chan.cookie = 1; | |
916 | ||
917 | d40d->txd.cookie = d40c->chan.cookie; | |
918 | ||
919 | if (d40c->log_num == D40_PHY_CHAN) | |
920 | d40_tx_submit_phy(d40c, d40d); | |
921 | else | |
922 | d40_tx_submit_log(d40c, d40d); | |
8d318a50 LW |
923 | |
924 | d40_desc_queue(d40c, d40d); | |
925 | ||
926 | spin_unlock_irqrestore(&d40c->lock, flags); | |
927 | ||
aa182ae2 JA |
928 | (void) d40_resume(&d40c->chan); |
929 | ||
8d318a50 LW |
930 | return tx->cookie; |
931 | } | |
932 | ||
933 | static int d40_start(struct d40_chan *d40c) | |
934 | { | |
f4185592 LW |
935 | if (d40c->base->rev == 0) { |
936 | int err; | |
937 | ||
938 | if (d40c->log_num != D40_PHY_CHAN) { | |
939 | err = d40_channel_execute_command(d40c, | |
940 | D40_DMA_SUSPEND_REQ); | |
941 | if (err) | |
942 | return err; | |
943 | } | |
944 | } | |
945 | ||
0c32269d | 946 | if (d40c->log_num != D40_PHY_CHAN) |
8d318a50 | 947 | d40_config_set_event(d40c, true); |
8d318a50 | 948 | |
0c32269d | 949 | return d40_channel_execute_command(d40c, D40_DMA_RUN); |
8d318a50 LW |
950 | } |
951 | ||
952 | static struct d40_desc *d40_queue_start(struct d40_chan *d40c) | |
953 | { | |
954 | struct d40_desc *d40d; | |
955 | int err; | |
956 | ||
957 | /* Start queued jobs, if any */ | |
958 | d40d = d40_first_queued(d40c); | |
959 | ||
960 | if (d40d != NULL) { | |
961 | d40c->busy = true; | |
962 | ||
963 | /* Remove from queue */ | |
964 | d40_desc_remove(d40d); | |
965 | ||
966 | /* Add to active queue */ | |
967 | d40_desc_submit(d40c, d40d); | |
968 | ||
aa182ae2 JA |
969 | /* |
970 | * If this job is already linked in hw, | |
971 | * do not submit it. | |
972 | */ | |
698e4732 | 973 | |
aa182ae2 JA |
974 | if (!d40d->is_hw_linked) { |
975 | /* Initiate DMA job */ | |
976 | d40_desc_load(d40c, d40d); | |
8d318a50 | 977 | |
aa182ae2 JA |
978 | /* Start dma job */ |
979 | err = d40_start(d40c); | |
8d318a50 | 980 | |
aa182ae2 JA |
981 | if (err) |
982 | return NULL; | |
983 | } | |
8d318a50 LW |
984 | } |
985 | ||
986 | return d40d; | |
987 | } | |
988 | ||
989 | /* called from interrupt context */ | |
990 | static void dma_tc_handle(struct d40_chan *d40c) | |
991 | { | |
992 | struct d40_desc *d40d; | |
993 | ||
8d318a50 LW |
994 | /* Get first active entry from list */ |
995 | d40d = d40_first_active_get(d40c); | |
996 | ||
997 | if (d40d == NULL) | |
998 | return; | |
999 | ||
698e4732 | 1000 | d40_lcla_free_all(d40c, d40d); |
8d318a50 | 1001 | |
698e4732 | 1002 | if (d40d->lli_current < d40d->lli_len) { |
8d318a50 LW |
1003 | d40_desc_load(d40c, d40d); |
1004 | /* Start dma job */ | |
1005 | (void) d40_start(d40c); | |
1006 | return; | |
1007 | } | |
1008 | ||
1009 | if (d40_queue_start(d40c) == NULL) | |
1010 | d40c->busy = false; | |
1011 | ||
1012 | d40c->pending_tx++; | |
1013 | tasklet_schedule(&d40c->tasklet); | |
1014 | ||
1015 | } | |
1016 | ||
1017 | static void dma_tasklet(unsigned long data) | |
1018 | { | |
1019 | struct d40_chan *d40c = (struct d40_chan *) data; | |
767a9675 | 1020 | struct d40_desc *d40d; |
8d318a50 LW |
1021 | unsigned long flags; |
1022 | dma_async_tx_callback callback; | |
1023 | void *callback_param; | |
1024 | ||
1025 | spin_lock_irqsave(&d40c->lock, flags); | |
1026 | ||
1027 | /* Get first active entry from list */ | |
767a9675 | 1028 | d40d = d40_first_active_get(d40c); |
8d318a50 | 1029 | |
767a9675 | 1030 | if (d40d == NULL) |
8d318a50 LW |
1031 | goto err; |
1032 | ||
767a9675 | 1033 | d40c->completed = d40d->txd.cookie; |
8d318a50 LW |
1034 | |
1035 | /* | |
1036 | * If terminating a channel pending_tx is set to zero. | |
1037 | * This prevents any finished active jobs to return to the client. | |
1038 | */ | |
1039 | if (d40c->pending_tx == 0) { | |
1040 | spin_unlock_irqrestore(&d40c->lock, flags); | |
1041 | return; | |
1042 | } | |
1043 | ||
1044 | /* Callback to client */ | |
767a9675 JA |
1045 | callback = d40d->txd.callback; |
1046 | callback_param = d40d->txd.callback_param; | |
1047 | ||
1048 | if (async_tx_test_ack(&d40d->txd)) { | |
1049 | d40_pool_lli_free(d40d); | |
1050 | d40_desc_remove(d40d); | |
1051 | d40_desc_free(d40c, d40d); | |
8d318a50 | 1052 | } else { |
767a9675 JA |
1053 | if (!d40d->is_in_client_list) { |
1054 | d40_desc_remove(d40d); | |
698e4732 | 1055 | d40_lcla_free_all(d40c, d40d); |
767a9675 JA |
1056 | list_add_tail(&d40d->node, &d40c->client); |
1057 | d40d->is_in_client_list = true; | |
8d318a50 LW |
1058 | } |
1059 | } | |
1060 | ||
1061 | d40c->pending_tx--; | |
1062 | ||
1063 | if (d40c->pending_tx) | |
1064 | tasklet_schedule(&d40c->tasklet); | |
1065 | ||
1066 | spin_unlock_irqrestore(&d40c->lock, flags); | |
1067 | ||
767a9675 | 1068 | if (callback && (d40d->txd.flags & DMA_PREP_INTERRUPT)) |
8d318a50 LW |
1069 | callback(callback_param); |
1070 | ||
1071 | return; | |
1072 | ||
1073 | err: | |
1074 | /* Rescue manouver if receiving double interrupts */ | |
1075 | if (d40c->pending_tx > 0) | |
1076 | d40c->pending_tx--; | |
1077 | spin_unlock_irqrestore(&d40c->lock, flags); | |
1078 | } | |
1079 | ||
1080 | static irqreturn_t d40_handle_interrupt(int irq, void *data) | |
1081 | { | |
1082 | static const struct d40_interrupt_lookup il[] = { | |
1083 | {D40_DREG_LCTIS0, D40_DREG_LCICR0, false, 0}, | |
1084 | {D40_DREG_LCTIS1, D40_DREG_LCICR1, false, 32}, | |
1085 | {D40_DREG_LCTIS2, D40_DREG_LCICR2, false, 64}, | |
1086 | {D40_DREG_LCTIS3, D40_DREG_LCICR3, false, 96}, | |
1087 | {D40_DREG_LCEIS0, D40_DREG_LCICR0, true, 0}, | |
1088 | {D40_DREG_LCEIS1, D40_DREG_LCICR1, true, 32}, | |
1089 | {D40_DREG_LCEIS2, D40_DREG_LCICR2, true, 64}, | |
1090 | {D40_DREG_LCEIS3, D40_DREG_LCICR3, true, 96}, | |
1091 | {D40_DREG_PCTIS, D40_DREG_PCICR, false, D40_PHY_CHAN}, | |
1092 | {D40_DREG_PCEIS, D40_DREG_PCICR, true, D40_PHY_CHAN}, | |
1093 | }; | |
1094 | ||
1095 | int i; | |
1096 | u32 regs[ARRAY_SIZE(il)]; | |
8d318a50 LW |
1097 | u32 idx; |
1098 | u32 row; | |
1099 | long chan = -1; | |
1100 | struct d40_chan *d40c; | |
1101 | unsigned long flags; | |
1102 | struct d40_base *base = data; | |
1103 | ||
1104 | spin_lock_irqsave(&base->interrupt_lock, flags); | |
1105 | ||
1106 | /* Read interrupt status of both logical and physical channels */ | |
1107 | for (i = 0; i < ARRAY_SIZE(il); i++) | |
1108 | regs[i] = readl(base->virtbase + il[i].src); | |
1109 | ||
1110 | for (;;) { | |
1111 | ||
1112 | chan = find_next_bit((unsigned long *)regs, | |
1113 | BITS_PER_LONG * ARRAY_SIZE(il), chan + 1); | |
1114 | ||
1115 | /* No more set bits found? */ | |
1116 | if (chan == BITS_PER_LONG * ARRAY_SIZE(il)) | |
1117 | break; | |
1118 | ||
1119 | row = chan / BITS_PER_LONG; | |
1120 | idx = chan & (BITS_PER_LONG - 1); | |
1121 | ||
1122 | /* ACK interrupt */ | |
1b00348d | 1123 | writel(1 << idx, base->virtbase + il[row].clr); |
8d318a50 LW |
1124 | |
1125 | if (il[row].offset == D40_PHY_CHAN) | |
1126 | d40c = base->lookup_phy_chans[idx]; | |
1127 | else | |
1128 | d40c = base->lookup_log_chans[il[row].offset + idx]; | |
1129 | spin_lock(&d40c->lock); | |
1130 | ||
1131 | if (!il[row].is_error) | |
1132 | dma_tc_handle(d40c); | |
1133 | else | |
508849ad LW |
1134 | dev_err(base->dev, |
1135 | "[%s] IRQ chan: %ld offset %d idx %d\n", | |
8d318a50 LW |
1136 | __func__, chan, il[row].offset, idx); |
1137 | ||
1138 | spin_unlock(&d40c->lock); | |
1139 | } | |
1140 | ||
1141 | spin_unlock_irqrestore(&base->interrupt_lock, flags); | |
1142 | ||
1143 | return IRQ_HANDLED; | |
1144 | } | |
1145 | ||
8d318a50 LW |
1146 | static int d40_validate_conf(struct d40_chan *d40c, |
1147 | struct stedma40_chan_cfg *conf) | |
1148 | { | |
1149 | int res = 0; | |
1150 | u32 dst_event_group = D40_TYPE_TO_GROUP(conf->dst_dev_type); | |
1151 | u32 src_event_group = D40_TYPE_TO_GROUP(conf->src_dev_type); | |
1152 | bool is_log = (conf->channel_type & STEDMA40_CHANNEL_IN_OPER_MODE) | |
1153 | == STEDMA40_CHANNEL_IN_LOG_MODE; | |
1154 | ||
0747c7ba LW |
1155 | if (!conf->dir) { |
1156 | dev_err(&d40c->chan.dev->device, "[%s] Invalid direction.\n", | |
1157 | __func__); | |
1158 | res = -EINVAL; | |
1159 | } | |
1160 | ||
1161 | if (conf->dst_dev_type != STEDMA40_DEV_DST_MEMORY && | |
1162 | d40c->base->plat_data->dev_tx[conf->dst_dev_type] == 0 && | |
1163 | d40c->runtime_addr == 0) { | |
1164 | ||
1165 | dev_err(&d40c->chan.dev->device, | |
1166 | "[%s] Invalid TX channel address (%d)\n", | |
1167 | __func__, conf->dst_dev_type); | |
1168 | res = -EINVAL; | |
1169 | } | |
1170 | ||
1171 | if (conf->src_dev_type != STEDMA40_DEV_SRC_MEMORY && | |
1172 | d40c->base->plat_data->dev_rx[conf->src_dev_type] == 0 && | |
1173 | d40c->runtime_addr == 0) { | |
1174 | dev_err(&d40c->chan.dev->device, | |
1175 | "[%s] Invalid RX channel address (%d)\n", | |
1176 | __func__, conf->src_dev_type); | |
1177 | res = -EINVAL; | |
1178 | } | |
1179 | ||
1180 | if (conf->dir == STEDMA40_MEM_TO_PERIPH && | |
8d318a50 LW |
1181 | dst_event_group == STEDMA40_DEV_DST_MEMORY) { |
1182 | dev_err(&d40c->chan.dev->device, "[%s] Invalid dst\n", | |
1183 | __func__); | |
1184 | res = -EINVAL; | |
1185 | } | |
1186 | ||
0747c7ba | 1187 | if (conf->dir == STEDMA40_PERIPH_TO_MEM && |
8d318a50 LW |
1188 | src_event_group == STEDMA40_DEV_SRC_MEMORY) { |
1189 | dev_err(&d40c->chan.dev->device, "[%s] Invalid src\n", | |
1190 | __func__); | |
1191 | res = -EINVAL; | |
1192 | } | |
1193 | ||
1194 | if (src_event_group == STEDMA40_DEV_SRC_MEMORY && | |
1195 | dst_event_group == STEDMA40_DEV_DST_MEMORY && is_log) { | |
1196 | dev_err(&d40c->chan.dev->device, | |
1197 | "[%s] No event line\n", __func__); | |
1198 | res = -EINVAL; | |
1199 | } | |
1200 | ||
1201 | if (conf->dir == STEDMA40_PERIPH_TO_PERIPH && | |
1202 | (src_event_group != dst_event_group)) { | |
1203 | dev_err(&d40c->chan.dev->device, | |
1204 | "[%s] Invalid event group\n", __func__); | |
1205 | res = -EINVAL; | |
1206 | } | |
1207 | ||
1208 | if (conf->dir == STEDMA40_PERIPH_TO_PERIPH) { | |
1209 | /* | |
1210 | * DMAC HW supports it. Will be added to this driver, | |
1211 | * in case any dma client requires it. | |
1212 | */ | |
1213 | dev_err(&d40c->chan.dev->device, | |
1214 | "[%s] periph to periph not supported\n", | |
1215 | __func__); | |
1216 | res = -EINVAL; | |
1217 | } | |
1218 | ||
1219 | return res; | |
1220 | } | |
1221 | ||
1222 | static bool d40_alloc_mask_set(struct d40_phy_res *phy, bool is_src, | |
4aed79b2 | 1223 | int log_event_line, bool is_log) |
8d318a50 LW |
1224 | { |
1225 | unsigned long flags; | |
1226 | spin_lock_irqsave(&phy->lock, flags); | |
4aed79b2 | 1227 | if (!is_log) { |
8d318a50 LW |
1228 | /* Physical interrupts are masked per physical full channel */ |
1229 | if (phy->allocated_src == D40_ALLOC_FREE && | |
1230 | phy->allocated_dst == D40_ALLOC_FREE) { | |
1231 | phy->allocated_dst = D40_ALLOC_PHY; | |
1232 | phy->allocated_src = D40_ALLOC_PHY; | |
1233 | goto found; | |
1234 | } else | |
1235 | goto not_found; | |
1236 | } | |
1237 | ||
1238 | /* Logical channel */ | |
1239 | if (is_src) { | |
1240 | if (phy->allocated_src == D40_ALLOC_PHY) | |
1241 | goto not_found; | |
1242 | ||
1243 | if (phy->allocated_src == D40_ALLOC_FREE) | |
1244 | phy->allocated_src = D40_ALLOC_LOG_FREE; | |
1245 | ||
1246 | if (!(phy->allocated_src & (1 << log_event_line))) { | |
1247 | phy->allocated_src |= 1 << log_event_line; | |
1248 | goto found; | |
1249 | } else | |
1250 | goto not_found; | |
1251 | } else { | |
1252 | if (phy->allocated_dst == D40_ALLOC_PHY) | |
1253 | goto not_found; | |
1254 | ||
1255 | if (phy->allocated_dst == D40_ALLOC_FREE) | |
1256 | phy->allocated_dst = D40_ALLOC_LOG_FREE; | |
1257 | ||
1258 | if (!(phy->allocated_dst & (1 << log_event_line))) { | |
1259 | phy->allocated_dst |= 1 << log_event_line; | |
1260 | goto found; | |
1261 | } else | |
1262 | goto not_found; | |
1263 | } | |
1264 | ||
1265 | not_found: | |
1266 | spin_unlock_irqrestore(&phy->lock, flags); | |
1267 | return false; | |
1268 | found: | |
1269 | spin_unlock_irqrestore(&phy->lock, flags); | |
1270 | return true; | |
1271 | } | |
1272 | ||
1273 | static bool d40_alloc_mask_free(struct d40_phy_res *phy, bool is_src, | |
1274 | int log_event_line) | |
1275 | { | |
1276 | unsigned long flags; | |
1277 | bool is_free = false; | |
1278 | ||
1279 | spin_lock_irqsave(&phy->lock, flags); | |
1280 | if (!log_event_line) { | |
8d318a50 LW |
1281 | phy->allocated_dst = D40_ALLOC_FREE; |
1282 | phy->allocated_src = D40_ALLOC_FREE; | |
1283 | is_free = true; | |
1284 | goto out; | |
1285 | } | |
1286 | ||
1287 | /* Logical channel */ | |
1288 | if (is_src) { | |
1289 | phy->allocated_src &= ~(1 << log_event_line); | |
1290 | if (phy->allocated_src == D40_ALLOC_LOG_FREE) | |
1291 | phy->allocated_src = D40_ALLOC_FREE; | |
1292 | } else { | |
1293 | phy->allocated_dst &= ~(1 << log_event_line); | |
1294 | if (phy->allocated_dst == D40_ALLOC_LOG_FREE) | |
1295 | phy->allocated_dst = D40_ALLOC_FREE; | |
1296 | } | |
1297 | ||
1298 | is_free = ((phy->allocated_src | phy->allocated_dst) == | |
1299 | D40_ALLOC_FREE); | |
1300 | ||
1301 | out: | |
1302 | spin_unlock_irqrestore(&phy->lock, flags); | |
1303 | ||
1304 | return is_free; | |
1305 | } | |
1306 | ||
1307 | static int d40_allocate_channel(struct d40_chan *d40c) | |
1308 | { | |
1309 | int dev_type; | |
1310 | int event_group; | |
1311 | int event_line; | |
1312 | struct d40_phy_res *phys; | |
1313 | int i; | |
1314 | int j; | |
1315 | int log_num; | |
1316 | bool is_src; | |
508849ad LW |
1317 | bool is_log = (d40c->dma_cfg.channel_type & |
1318 | STEDMA40_CHANNEL_IN_OPER_MODE) | |
8d318a50 LW |
1319 | == STEDMA40_CHANNEL_IN_LOG_MODE; |
1320 | ||
1321 | ||
1322 | phys = d40c->base->phy_res; | |
1323 | ||
1324 | if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) { | |
1325 | dev_type = d40c->dma_cfg.src_dev_type; | |
1326 | log_num = 2 * dev_type; | |
1327 | is_src = true; | |
1328 | } else if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_PERIPH || | |
1329 | d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) { | |
1330 | /* dst event lines are used for logical memcpy */ | |
1331 | dev_type = d40c->dma_cfg.dst_dev_type; | |
1332 | log_num = 2 * dev_type + 1; | |
1333 | is_src = false; | |
1334 | } else | |
1335 | return -EINVAL; | |
1336 | ||
1337 | event_group = D40_TYPE_TO_GROUP(dev_type); | |
1338 | event_line = D40_TYPE_TO_EVENT(dev_type); | |
1339 | ||
1340 | if (!is_log) { | |
1341 | if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) { | |
1342 | /* Find physical half channel */ | |
1343 | for (i = 0; i < d40c->base->num_phy_chans; i++) { | |
1344 | ||
4aed79b2 MM |
1345 | if (d40_alloc_mask_set(&phys[i], is_src, |
1346 | 0, is_log)) | |
8d318a50 LW |
1347 | goto found_phy; |
1348 | } | |
1349 | } else | |
1350 | for (j = 0; j < d40c->base->num_phy_chans; j += 8) { | |
1351 | int phy_num = j + event_group * 2; | |
1352 | for (i = phy_num; i < phy_num + 2; i++) { | |
508849ad LW |
1353 | if (d40_alloc_mask_set(&phys[i], |
1354 | is_src, | |
1355 | 0, | |
1356 | is_log)) | |
8d318a50 LW |
1357 | goto found_phy; |
1358 | } | |
1359 | } | |
1360 | return -EINVAL; | |
1361 | found_phy: | |
1362 | d40c->phy_chan = &phys[i]; | |
1363 | d40c->log_num = D40_PHY_CHAN; | |
1364 | goto out; | |
1365 | } | |
1366 | if (dev_type == -1) | |
1367 | return -EINVAL; | |
1368 | ||
1369 | /* Find logical channel */ | |
1370 | for (j = 0; j < d40c->base->num_phy_chans; j += 8) { | |
1371 | int phy_num = j + event_group * 2; | |
1372 | /* | |
1373 | * Spread logical channels across all available physical rather | |
1374 | * than pack every logical channel at the first available phy | |
1375 | * channels. | |
1376 | */ | |
1377 | if (is_src) { | |
1378 | for (i = phy_num; i < phy_num + 2; i++) { | |
1379 | if (d40_alloc_mask_set(&phys[i], is_src, | |
4aed79b2 | 1380 | event_line, is_log)) |
8d318a50 LW |
1381 | goto found_log; |
1382 | } | |
1383 | } else { | |
1384 | for (i = phy_num + 1; i >= phy_num; i--) { | |
1385 | if (d40_alloc_mask_set(&phys[i], is_src, | |
4aed79b2 | 1386 | event_line, is_log)) |
8d318a50 LW |
1387 | goto found_log; |
1388 | } | |
1389 | } | |
1390 | } | |
1391 | return -EINVAL; | |
1392 | ||
1393 | found_log: | |
1394 | d40c->phy_chan = &phys[i]; | |
1395 | d40c->log_num = log_num; | |
1396 | out: | |
1397 | ||
1398 | if (is_log) | |
1399 | d40c->base->lookup_log_chans[d40c->log_num] = d40c; | |
1400 | else | |
1401 | d40c->base->lookup_phy_chans[d40c->phy_chan->num] = d40c; | |
1402 | ||
1403 | return 0; | |
1404 | ||
1405 | } | |
1406 | ||
8d318a50 LW |
1407 | static int d40_config_memcpy(struct d40_chan *d40c) |
1408 | { | |
1409 | dma_cap_mask_t cap = d40c->chan.device->cap_mask; | |
1410 | ||
1411 | if (dma_has_cap(DMA_MEMCPY, cap) && !dma_has_cap(DMA_SLAVE, cap)) { | |
1412 | d40c->dma_cfg = *d40c->base->plat_data->memcpy_conf_log; | |
1413 | d40c->dma_cfg.src_dev_type = STEDMA40_DEV_SRC_MEMORY; | |
1414 | d40c->dma_cfg.dst_dev_type = d40c->base->plat_data-> | |
1415 | memcpy[d40c->chan.chan_id]; | |
1416 | ||
1417 | } else if (dma_has_cap(DMA_MEMCPY, cap) && | |
1418 | dma_has_cap(DMA_SLAVE, cap)) { | |
1419 | d40c->dma_cfg = *d40c->base->plat_data->memcpy_conf_phy; | |
1420 | } else { | |
1421 | dev_err(&d40c->chan.dev->device, "[%s] No memcpy\n", | |
1422 | __func__); | |
1423 | return -EINVAL; | |
1424 | } | |
1425 | ||
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | ||
1430 | static int d40_free_dma(struct d40_chan *d40c) | |
1431 | { | |
1432 | ||
1433 | int res = 0; | |
d181b3a8 | 1434 | u32 event; |
8d318a50 LW |
1435 | struct d40_phy_res *phy = d40c->phy_chan; |
1436 | bool is_src; | |
a8be8627 PF |
1437 | struct d40_desc *d; |
1438 | struct d40_desc *_d; | |
1439 | ||
8d318a50 LW |
1440 | |
1441 | /* Terminate all queued and active transfers */ | |
1442 | d40_term_all(d40c); | |
1443 | ||
a8be8627 PF |
1444 | /* Release client owned descriptors */ |
1445 | if (!list_empty(&d40c->client)) | |
1446 | list_for_each_entry_safe(d, _d, &d40c->client, node) { | |
1447 | d40_pool_lli_free(d); | |
1448 | d40_desc_remove(d); | |
a8be8627 PF |
1449 | d40_desc_free(d40c, d); |
1450 | } | |
1451 | ||
8d318a50 LW |
1452 | if (phy == NULL) { |
1453 | dev_err(&d40c->chan.dev->device, "[%s] phy == null\n", | |
1454 | __func__); | |
1455 | return -EINVAL; | |
1456 | } | |
1457 | ||
1458 | if (phy->allocated_src == D40_ALLOC_FREE && | |
1459 | phy->allocated_dst == D40_ALLOC_FREE) { | |
1460 | dev_err(&d40c->chan.dev->device, "[%s] channel already free\n", | |
1461 | __func__); | |
1462 | return -EINVAL; | |
1463 | } | |
1464 | ||
8d318a50 LW |
1465 | if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_PERIPH || |
1466 | d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) { | |
1467 | event = D40_TYPE_TO_EVENT(d40c->dma_cfg.dst_dev_type); | |
8d318a50 LW |
1468 | is_src = false; |
1469 | } else if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) { | |
1470 | event = D40_TYPE_TO_EVENT(d40c->dma_cfg.src_dev_type); | |
8d318a50 LW |
1471 | is_src = true; |
1472 | } else { | |
1473 | dev_err(&d40c->chan.dev->device, | |
1474 | "[%s] Unknown direction\n", __func__); | |
1475 | return -EINVAL; | |
1476 | } | |
1477 | ||
d181b3a8 JA |
1478 | res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ); |
1479 | if (res) { | |
1480 | dev_err(&d40c->chan.dev->device, "[%s] suspend failed\n", | |
1481 | __func__); | |
1482 | return res; | |
1483 | } | |
1484 | ||
8d318a50 | 1485 | if (d40c->log_num != D40_PHY_CHAN) { |
d181b3a8 | 1486 | /* Release logical channel, deactivate the event line */ |
8d318a50 | 1487 | |
d181b3a8 | 1488 | d40_config_set_event(d40c, false); |
8d318a50 LW |
1489 | d40c->base->lookup_log_chans[d40c->log_num] = NULL; |
1490 | ||
1491 | /* | |
1492 | * Check if there are more logical allocation | |
1493 | * on this phy channel. | |
1494 | */ | |
1495 | if (!d40_alloc_mask_free(phy, is_src, event)) { | |
1496 | /* Resume the other logical channels if any */ | |
1497 | if (d40_chan_has_events(d40c)) { | |
1498 | res = d40_channel_execute_command(d40c, | |
1499 | D40_DMA_RUN); | |
1500 | if (res) { | |
1501 | dev_err(&d40c->chan.dev->device, | |
1502 | "[%s] Executing RUN command\n", | |
1503 | __func__); | |
1504 | return res; | |
1505 | } | |
1506 | } | |
1507 | return 0; | |
1508 | } | |
d181b3a8 JA |
1509 | } else { |
1510 | (void) d40_alloc_mask_free(phy, is_src, 0); | |
1511 | } | |
8d318a50 LW |
1512 | |
1513 | /* Release physical channel */ | |
1514 | res = d40_channel_execute_command(d40c, D40_DMA_STOP); | |
1515 | if (res) { | |
1516 | dev_err(&d40c->chan.dev->device, | |
1517 | "[%s] Failed to stop channel\n", __func__); | |
1518 | return res; | |
1519 | } | |
1520 | d40c->phy_chan = NULL; | |
1521 | /* Invalidate channel type */ | |
1522 | d40c->dma_cfg.channel_type = 0; | |
1523 | d40c->base->lookup_phy_chans[phy->num] = NULL; | |
1524 | ||
1525 | return 0; | |
8d318a50 LW |
1526 | } |
1527 | ||
a5ebca47 JA |
1528 | static bool d40_is_paused(struct d40_chan *d40c) |
1529 | { | |
1530 | bool is_paused = false; | |
1531 | unsigned long flags; | |
1532 | void __iomem *active_reg; | |
1533 | u32 status; | |
1534 | u32 event; | |
a5ebca47 JA |
1535 | |
1536 | spin_lock_irqsave(&d40c->lock, flags); | |
1537 | ||
1538 | if (d40c->log_num == D40_PHY_CHAN) { | |
1539 | if (d40c->phy_chan->num % 2 == 0) | |
1540 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVE; | |
1541 | else | |
1542 | active_reg = d40c->base->virtbase + D40_DREG_ACTIVO; | |
1543 | ||
1544 | status = (readl(active_reg) & | |
1545 | D40_CHAN_POS_MASK(d40c->phy_chan->num)) >> | |
1546 | D40_CHAN_POS(d40c->phy_chan->num); | |
1547 | if (status == D40_DMA_SUSPENDED || status == D40_DMA_STOP) | |
1548 | is_paused = true; | |
1549 | ||
1550 | goto _exit; | |
1551 | } | |
1552 | ||
a5ebca47 | 1553 | if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_PERIPH || |
9dbfbd35 | 1554 | d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) { |
a5ebca47 | 1555 | event = D40_TYPE_TO_EVENT(d40c->dma_cfg.dst_dev_type); |
9dbfbd35 JA |
1556 | status = readl(d40c->base->virtbase + D40_DREG_PCBASE + |
1557 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
1558 | D40_CHAN_REG_SDLNK); | |
1559 | } else if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) { | |
a5ebca47 | 1560 | event = D40_TYPE_TO_EVENT(d40c->dma_cfg.src_dev_type); |
9dbfbd35 JA |
1561 | status = readl(d40c->base->virtbase + D40_DREG_PCBASE + |
1562 | d40c->phy_chan->num * D40_DREG_PCDELTA + | |
1563 | D40_CHAN_REG_SSLNK); | |
1564 | } else { | |
a5ebca47 JA |
1565 | dev_err(&d40c->chan.dev->device, |
1566 | "[%s] Unknown direction\n", __func__); | |
1567 | goto _exit; | |
1568 | } | |
9dbfbd35 | 1569 | |
a5ebca47 JA |
1570 | status = (status & D40_EVENTLINE_MASK(event)) >> |
1571 | D40_EVENTLINE_POS(event); | |
1572 | ||
1573 | if (status != D40_DMA_RUN) | |
1574 | is_paused = true; | |
a5ebca47 JA |
1575 | _exit: |
1576 | spin_unlock_irqrestore(&d40c->lock, flags); | |
1577 | return is_paused; | |
1578 | ||
1579 | } | |
1580 | ||
1581 | ||
8d318a50 LW |
1582 | static u32 stedma40_residue(struct dma_chan *chan) |
1583 | { | |
1584 | struct d40_chan *d40c = | |
1585 | container_of(chan, struct d40_chan, chan); | |
1586 | u32 bytes_left; | |
1587 | unsigned long flags; | |
1588 | ||
1589 | spin_lock_irqsave(&d40c->lock, flags); | |
1590 | bytes_left = d40_residue(d40c); | |
1591 | spin_unlock_irqrestore(&d40c->lock, flags); | |
1592 | ||
1593 | return bytes_left; | |
1594 | } | |
1595 | ||
8d318a50 LW |
1596 | struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan, |
1597 | struct scatterlist *sgl_dst, | |
1598 | struct scatterlist *sgl_src, | |
1599 | unsigned int sgl_len, | |
2a614340 | 1600 | unsigned long dma_flags) |
8d318a50 LW |
1601 | { |
1602 | int res; | |
1603 | struct d40_desc *d40d; | |
1604 | struct d40_chan *d40c = container_of(chan, struct d40_chan, | |
1605 | chan); | |
2a614340 | 1606 | unsigned long flags; |
8d318a50 | 1607 | |
0d0f6b8b JA |
1608 | if (d40c->phy_chan == NULL) { |
1609 | dev_err(&d40c->chan.dev->device, | |
1610 | "[%s] Unallocated channel.\n", __func__); | |
1611 | return ERR_PTR(-EINVAL); | |
1612 | } | |
1613 | ||
2a614340 | 1614 | spin_lock_irqsave(&d40c->lock, flags); |
8d318a50 LW |
1615 | d40d = d40_desc_get(d40c); |
1616 | ||
1617 | if (d40d == NULL) | |
1618 | goto err; | |
1619 | ||
8d318a50 | 1620 | d40d->lli_len = sgl_len; |
698e4732 | 1621 | d40d->lli_current = 0; |
2a614340 | 1622 | d40d->txd.flags = dma_flags; |
8d318a50 LW |
1623 | |
1624 | if (d40c->log_num != D40_PHY_CHAN) { | |
8d318a50 LW |
1625 | |
1626 | if (d40_pool_lli_alloc(d40d, sgl_len, true) < 0) { | |
1627 | dev_err(&d40c->chan.dev->device, | |
1628 | "[%s] Out of memory\n", __func__); | |
1629 | goto err; | |
1630 | } | |
1631 | ||
698e4732 | 1632 | (void) d40_log_sg_to_lli(sgl_src, |
8d318a50 LW |
1633 | sgl_len, |
1634 | d40d->lli_log.src, | |
1635 | d40c->log_def.lcsp1, | |
698e4732 | 1636 | d40c->dma_cfg.src_info.data_width); |
8d318a50 | 1637 | |
698e4732 | 1638 | (void) d40_log_sg_to_lli(sgl_dst, |
8d318a50 LW |
1639 | sgl_len, |
1640 | d40d->lli_log.dst, | |
1641 | d40c->log_def.lcsp3, | |
698e4732 | 1642 | d40c->dma_cfg.dst_info.data_width); |
8d318a50 LW |
1643 | } else { |
1644 | if (d40_pool_lli_alloc(d40d, sgl_len, false) < 0) { | |
1645 | dev_err(&d40c->chan.dev->device, | |
1646 | "[%s] Out of memory\n", __func__); | |
1647 | goto err; | |
1648 | } | |
1649 | ||
1650 | res = d40_phy_sg_to_lli(sgl_src, | |
1651 | sgl_len, | |
1652 | 0, | |
1653 | d40d->lli_phy.src, | |
aa182ae2 | 1654 | virt_to_phys(d40d->lli_phy.src), |
8d318a50 LW |
1655 | d40c->src_def_cfg, |
1656 | d40c->dma_cfg.src_info.data_width, | |
0246e77b | 1657 | d40c->dma_cfg.src_info.psize); |
8d318a50 LW |
1658 | |
1659 | if (res < 0) | |
1660 | goto err; | |
1661 | ||
1662 | res = d40_phy_sg_to_lli(sgl_dst, | |
1663 | sgl_len, | |
1664 | 0, | |
1665 | d40d->lli_phy.dst, | |
aa182ae2 | 1666 | virt_to_phys(d40d->lli_phy.dst), |
8d318a50 LW |
1667 | d40c->dst_def_cfg, |
1668 | d40c->dma_cfg.dst_info.data_width, | |
0246e77b | 1669 | d40c->dma_cfg.dst_info.psize); |
8d318a50 LW |
1670 | |
1671 | if (res < 0) | |
1672 | goto err; | |
1673 | ||
1674 | (void) dma_map_single(d40c->base->dev, d40d->lli_phy.src, | |
1675 | d40d->lli_pool.size, DMA_TO_DEVICE); | |
1676 | } | |
1677 | ||
1678 | dma_async_tx_descriptor_init(&d40d->txd, chan); | |
1679 | ||
1680 | d40d->txd.tx_submit = d40_tx_submit; | |
1681 | ||
2a614340 | 1682 | spin_unlock_irqrestore(&d40c->lock, flags); |
8d318a50 LW |
1683 | |
1684 | return &d40d->txd; | |
1685 | err: | |
819504f4 RV |
1686 | if (d40d) |
1687 | d40_desc_free(d40c, d40d); | |
2a614340 | 1688 | spin_unlock_irqrestore(&d40c->lock, flags); |
8d318a50 LW |
1689 | return NULL; |
1690 | } | |
1691 | EXPORT_SYMBOL(stedma40_memcpy_sg); | |
1692 | ||
1693 | bool stedma40_filter(struct dma_chan *chan, void *data) | |
1694 | { | |
1695 | struct stedma40_chan_cfg *info = data; | |
1696 | struct d40_chan *d40c = | |
1697 | container_of(chan, struct d40_chan, chan); | |
1698 | int err; | |
1699 | ||
1700 | if (data) { | |
1701 | err = d40_validate_conf(d40c, info); | |
1702 | if (!err) | |
1703 | d40c->dma_cfg = *info; | |
1704 | } else | |
1705 | err = d40_config_memcpy(d40c); | |
1706 | ||
1707 | return err == 0; | |
1708 | } | |
1709 | EXPORT_SYMBOL(stedma40_filter); | |
1710 | ||
1711 | /* DMA ENGINE functions */ | |
1712 | static int d40_alloc_chan_resources(struct dma_chan *chan) | |
1713 | { | |
1714 | int err; | |
1715 | unsigned long flags; | |
1716 | struct d40_chan *d40c = | |
1717 | container_of(chan, struct d40_chan, chan); | |
ef1872ec | 1718 | bool is_free_phy; |
8d318a50 LW |
1719 | spin_lock_irqsave(&d40c->lock, flags); |
1720 | ||
1721 | d40c->completed = chan->cookie = 1; | |
1722 | ||
1723 | /* | |
1724 | * If no dma configuration is set (channel_type == 0) | |
ef1872ec | 1725 | * use default configuration (memcpy) |
8d318a50 LW |
1726 | */ |
1727 | if (d40c->dma_cfg.channel_type == 0) { | |
aa182ae2 | 1728 | |
8d318a50 | 1729 | err = d40_config_memcpy(d40c); |
ff0b12ba JA |
1730 | if (err) { |
1731 | dev_err(&d40c->chan.dev->device, | |
1732 | "[%s] Failed to configure memcpy channel\n", | |
1733 | __func__); | |
1734 | goto fail; | |
1735 | } | |
8d318a50 | 1736 | } |
ef1872ec | 1737 | is_free_phy = (d40c->phy_chan == NULL); |
8d318a50 LW |
1738 | |
1739 | err = d40_allocate_channel(d40c); | |
1740 | if (err) { | |
1741 | dev_err(&d40c->chan.dev->device, | |
1742 | "[%s] Failed to allocate channel\n", __func__); | |
ff0b12ba | 1743 | goto fail; |
8d318a50 LW |
1744 | } |
1745 | ||
ef1872ec LW |
1746 | /* Fill in basic CFG register values */ |
1747 | d40_phy_cfg(&d40c->dma_cfg, &d40c->src_def_cfg, | |
1748 | &d40c->dst_def_cfg, d40c->log_num != D40_PHY_CHAN); | |
1749 | ||
1750 | if (d40c->log_num != D40_PHY_CHAN) { | |
1751 | d40_log_cfg(&d40c->dma_cfg, | |
1752 | &d40c->log_def.lcsp1, &d40c->log_def.lcsp3); | |
1753 | ||
1754 | if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) | |
1755 | d40c->lcpa = d40c->base->lcpa_base + | |
1756 | d40c->dma_cfg.src_dev_type * D40_LCPA_CHAN_SIZE; | |
1757 | else | |
1758 | d40c->lcpa = d40c->base->lcpa_base + | |
1759 | d40c->dma_cfg.dst_dev_type * | |
1760 | D40_LCPA_CHAN_SIZE + D40_LCPA_CHAN_DST_DELTA; | |
1761 | } | |
1762 | ||
1763 | /* | |
1764 | * Only write channel configuration to the DMA if the physical | |
1765 | * resource is free. In case of multiple logical channels | |
1766 | * on the same physical resource, only the first write is necessary. | |
1767 | */ | |
b55912c6 JA |
1768 | if (is_free_phy) |
1769 | d40_config_write(d40c); | |
ff0b12ba | 1770 | fail: |
8d318a50 | 1771 | spin_unlock_irqrestore(&d40c->lock, flags); |
ff0b12ba | 1772 | return err; |
8d318a50 LW |
1773 | } |
1774 | ||
1775 | static void d40_free_chan_resources(struct dma_chan *chan) | |
1776 | { | |
1777 | struct d40_chan *d40c = | |
1778 | container_of(chan, struct d40_chan, chan); | |
1779 | int err; | |
1780 | unsigned long flags; | |
1781 | ||
0d0f6b8b JA |
1782 | if (d40c->phy_chan == NULL) { |
1783 | dev_err(&d40c->chan.dev->device, | |
1784 | "[%s] Cannot free unallocated channel\n", __func__); | |
1785 | return; | |
1786 | } | |
1787 | ||
1788 | ||
8d318a50 LW |
1789 | spin_lock_irqsave(&d40c->lock, flags); |
1790 | ||
1791 | err = d40_free_dma(d40c); | |
1792 | ||
1793 | if (err) | |
1794 | dev_err(&d40c->chan.dev->device, | |
1795 | "[%s] Failed to free channel\n", __func__); | |
1796 | spin_unlock_irqrestore(&d40c->lock, flags); | |
1797 | } | |
1798 | ||
1799 | static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan, | |
1800 | dma_addr_t dst, | |
1801 | dma_addr_t src, | |
1802 | size_t size, | |
2a614340 | 1803 | unsigned long dma_flags) |
8d318a50 LW |
1804 | { |
1805 | struct d40_desc *d40d; | |
1806 | struct d40_chan *d40c = container_of(chan, struct d40_chan, | |
1807 | chan); | |
2a614340 | 1808 | unsigned long flags; |
8d318a50 LW |
1809 | int err = 0; |
1810 | ||
0d0f6b8b JA |
1811 | if (d40c->phy_chan == NULL) { |
1812 | dev_err(&d40c->chan.dev->device, | |
1813 | "[%s] Channel is not allocated.\n", __func__); | |
1814 | return ERR_PTR(-EINVAL); | |
1815 | } | |
1816 | ||
2a614340 | 1817 | spin_lock_irqsave(&d40c->lock, flags); |
8d318a50 LW |
1818 | d40d = d40_desc_get(d40c); |
1819 | ||
1820 | if (d40d == NULL) { | |
1821 | dev_err(&d40c->chan.dev->device, | |
1822 | "[%s] Descriptor is NULL\n", __func__); | |
1823 | goto err; | |
1824 | } | |
1825 | ||
2a614340 | 1826 | d40d->txd.flags = dma_flags; |
8d318a50 LW |
1827 | |
1828 | dma_async_tx_descriptor_init(&d40d->txd, chan); | |
1829 | ||
1830 | d40d->txd.tx_submit = d40_tx_submit; | |
1831 | ||
1832 | if (d40c->log_num != D40_PHY_CHAN) { | |
1833 | ||
1834 | if (d40_pool_lli_alloc(d40d, 1, true) < 0) { | |
1835 | dev_err(&d40c->chan.dev->device, | |
1836 | "[%s] Out of memory\n", __func__); | |
1837 | goto err; | |
1838 | } | |
1839 | d40d->lli_len = 1; | |
698e4732 | 1840 | d40d->lli_current = 0; |
8d318a50 LW |
1841 | |
1842 | d40_log_fill_lli(d40d->lli_log.src, | |
1843 | src, | |
1844 | size, | |
8d318a50 LW |
1845 | d40c->log_def.lcsp1, |
1846 | d40c->dma_cfg.src_info.data_width, | |
698e4732 | 1847 | true); |
8d318a50 LW |
1848 | |
1849 | d40_log_fill_lli(d40d->lli_log.dst, | |
1850 | dst, | |
1851 | size, | |
8d318a50 LW |
1852 | d40c->log_def.lcsp3, |
1853 | d40c->dma_cfg.dst_info.data_width, | |
698e4732 | 1854 | true); |
8d318a50 LW |
1855 | |
1856 | } else { | |
1857 | ||
1858 | if (d40_pool_lli_alloc(d40d, 1, false) < 0) { | |
1859 | dev_err(&d40c->chan.dev->device, | |
1860 | "[%s] Out of memory\n", __func__); | |
1861 | goto err; | |
1862 | } | |
1863 | ||
1864 | err = d40_phy_fill_lli(d40d->lli_phy.src, | |
1865 | src, | |
1866 | size, | |
1867 | d40c->dma_cfg.src_info.psize, | |
1868 | 0, | |
1869 | d40c->src_def_cfg, | |
1870 | true, | |
1871 | d40c->dma_cfg.src_info.data_width, | |
1872 | false); | |
1873 | if (err) | |
1874 | goto err_fill_lli; | |
1875 | ||
1876 | err = d40_phy_fill_lli(d40d->lli_phy.dst, | |
1877 | dst, | |
1878 | size, | |
1879 | d40c->dma_cfg.dst_info.psize, | |
1880 | 0, | |
1881 | d40c->dst_def_cfg, | |
1882 | true, | |
1883 | d40c->dma_cfg.dst_info.data_width, | |
1884 | false); | |
1885 | ||
1886 | if (err) | |
1887 | goto err_fill_lli; | |
1888 | ||
1889 | (void) dma_map_single(d40c->base->dev, d40d->lli_phy.src, | |
1890 | d40d->lli_pool.size, DMA_TO_DEVICE); | |
1891 | } | |
1892 | ||
2a614340 | 1893 | spin_unlock_irqrestore(&d40c->lock, flags); |
8d318a50 LW |
1894 | return &d40d->txd; |
1895 | ||
1896 | err_fill_lli: | |
1897 | dev_err(&d40c->chan.dev->device, | |
1898 | "[%s] Failed filling in PHY LLI\n", __func__); | |
8d318a50 | 1899 | err: |
819504f4 RV |
1900 | if (d40d) |
1901 | d40_desc_free(d40c, d40d); | |
2a614340 | 1902 | spin_unlock_irqrestore(&d40c->lock, flags); |
8d318a50 LW |
1903 | return NULL; |
1904 | } | |
1905 | ||
1906 | static int d40_prep_slave_sg_log(struct d40_desc *d40d, | |
1907 | struct d40_chan *d40c, | |
1908 | struct scatterlist *sgl, | |
1909 | unsigned int sg_len, | |
1910 | enum dma_data_direction direction, | |
2a614340 | 1911 | unsigned long dma_flags) |
8d318a50 LW |
1912 | { |
1913 | dma_addr_t dev_addr = 0; | |
1914 | int total_size; | |
8d318a50 LW |
1915 | |
1916 | if (d40_pool_lli_alloc(d40d, sg_len, true) < 0) { | |
1917 | dev_err(&d40c->chan.dev->device, | |
1918 | "[%s] Out of memory\n", __func__); | |
1919 | return -ENOMEM; | |
1920 | } | |
1921 | ||
1922 | d40d->lli_len = sg_len; | |
698e4732 | 1923 | d40d->lli_current = 0; |
8d318a50 | 1924 | |
2a614340 | 1925 | if (direction == DMA_FROM_DEVICE) |
95e1400f LW |
1926 | if (d40c->runtime_addr) |
1927 | dev_addr = d40c->runtime_addr; | |
1928 | else | |
1929 | dev_addr = d40c->base->plat_data->dev_rx[d40c->dma_cfg.src_dev_type]; | |
2a614340 | 1930 | else if (direction == DMA_TO_DEVICE) |
95e1400f LW |
1931 | if (d40c->runtime_addr) |
1932 | dev_addr = d40c->runtime_addr; | |
1933 | else | |
1934 | dev_addr = d40c->base->plat_data->dev_tx[d40c->dma_cfg.dst_dev_type]; | |
1935 | ||
2a614340 | 1936 | else |
8d318a50 | 1937 | return -EINVAL; |
2a614340 | 1938 | |
698e4732 | 1939 | total_size = d40_log_sg_to_dev(sgl, sg_len, |
2a614340 JA |
1940 | &d40d->lli_log, |
1941 | &d40c->log_def, | |
1942 | d40c->dma_cfg.src_info.data_width, | |
1943 | d40c->dma_cfg.dst_info.data_width, | |
1944 | direction, | |
698e4732 | 1945 | dev_addr); |
2a614340 | 1946 | |
8d318a50 LW |
1947 | if (total_size < 0) |
1948 | return -EINVAL; | |
1949 | ||
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | static int d40_prep_slave_sg_phy(struct d40_desc *d40d, | |
1954 | struct d40_chan *d40c, | |
1955 | struct scatterlist *sgl, | |
1956 | unsigned int sgl_len, | |
1957 | enum dma_data_direction direction, | |
2a614340 | 1958 | unsigned long dma_flags) |
8d318a50 LW |
1959 | { |
1960 | dma_addr_t src_dev_addr; | |
1961 | dma_addr_t dst_dev_addr; | |
1962 | int res; | |
1963 | ||
1964 | if (d40_pool_lli_alloc(d40d, sgl_len, false) < 0) { | |
1965 | dev_err(&d40c->chan.dev->device, | |
1966 | "[%s] Out of memory\n", __func__); | |
1967 | return -ENOMEM; | |
1968 | } | |
1969 | ||
1970 | d40d->lli_len = sgl_len; | |
698e4732 | 1971 | d40d->lli_current = 0; |
8d318a50 LW |
1972 | |
1973 | if (direction == DMA_FROM_DEVICE) { | |
1974 | dst_dev_addr = 0; | |
95e1400f LW |
1975 | if (d40c->runtime_addr) |
1976 | src_dev_addr = d40c->runtime_addr; | |
1977 | else | |
1978 | src_dev_addr = d40c->base->plat_data->dev_rx[d40c->dma_cfg.src_dev_type]; | |
8d318a50 | 1979 | } else if (direction == DMA_TO_DEVICE) { |
95e1400f LW |
1980 | if (d40c->runtime_addr) |
1981 | dst_dev_addr = d40c->runtime_addr; | |
1982 | else | |
1983 | dst_dev_addr = d40c->base->plat_data->dev_tx[d40c->dma_cfg.dst_dev_type]; | |
8d318a50 LW |
1984 | src_dev_addr = 0; |
1985 | } else | |
1986 | return -EINVAL; | |
1987 | ||
1988 | res = d40_phy_sg_to_lli(sgl, | |
1989 | sgl_len, | |
1990 | src_dev_addr, | |
1991 | d40d->lli_phy.src, | |
aa182ae2 | 1992 | virt_to_phys(d40d->lli_phy.src), |
8d318a50 LW |
1993 | d40c->src_def_cfg, |
1994 | d40c->dma_cfg.src_info.data_width, | |
0246e77b | 1995 | d40c->dma_cfg.src_info.psize); |
8d318a50 LW |
1996 | if (res < 0) |
1997 | return res; | |
1998 | ||
1999 | res = d40_phy_sg_to_lli(sgl, | |
2000 | sgl_len, | |
2001 | dst_dev_addr, | |
2002 | d40d->lli_phy.dst, | |
aa182ae2 | 2003 | virt_to_phys(d40d->lli_phy.dst), |
8d318a50 LW |
2004 | d40c->dst_def_cfg, |
2005 | d40c->dma_cfg.dst_info.data_width, | |
0246e77b | 2006 | d40c->dma_cfg.dst_info.psize); |
8d318a50 LW |
2007 | if (res < 0) |
2008 | return res; | |
2009 | ||
2010 | (void) dma_map_single(d40c->base->dev, d40d->lli_phy.src, | |
2011 | d40d->lli_pool.size, DMA_TO_DEVICE); | |
2012 | return 0; | |
2013 | } | |
2014 | ||
2015 | static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan, | |
2016 | struct scatterlist *sgl, | |
2017 | unsigned int sg_len, | |
2018 | enum dma_data_direction direction, | |
2a614340 | 2019 | unsigned long dma_flags) |
8d318a50 LW |
2020 | { |
2021 | struct d40_desc *d40d; | |
2022 | struct d40_chan *d40c = container_of(chan, struct d40_chan, | |
2023 | chan); | |
2a614340 | 2024 | unsigned long flags; |
8d318a50 LW |
2025 | int err; |
2026 | ||
0d0f6b8b JA |
2027 | if (d40c->phy_chan == NULL) { |
2028 | dev_err(&d40c->chan.dev->device, | |
2029 | "[%s] Cannot prepare unallocated channel\n", __func__); | |
2030 | return ERR_PTR(-EINVAL); | |
2031 | } | |
2032 | ||
2a614340 | 2033 | spin_lock_irqsave(&d40c->lock, flags); |
8d318a50 | 2034 | d40d = d40_desc_get(d40c); |
8d318a50 LW |
2035 | |
2036 | if (d40d == NULL) | |
819504f4 | 2037 | goto err; |
8d318a50 | 2038 | |
8d318a50 LW |
2039 | if (d40c->log_num != D40_PHY_CHAN) |
2040 | err = d40_prep_slave_sg_log(d40d, d40c, sgl, sg_len, | |
2a614340 | 2041 | direction, dma_flags); |
8d318a50 LW |
2042 | else |
2043 | err = d40_prep_slave_sg_phy(d40d, d40c, sgl, sg_len, | |
2a614340 | 2044 | direction, dma_flags); |
8d318a50 LW |
2045 | if (err) { |
2046 | dev_err(&d40c->chan.dev->device, | |
2047 | "[%s] Failed to prepare %s slave sg job: %d\n", | |
2048 | __func__, | |
2049 | d40c->log_num != D40_PHY_CHAN ? "log" : "phy", err); | |
819504f4 | 2050 | goto err; |
8d318a50 LW |
2051 | } |
2052 | ||
2a614340 | 2053 | d40d->txd.flags = dma_flags; |
8d318a50 LW |
2054 | |
2055 | dma_async_tx_descriptor_init(&d40d->txd, chan); | |
2056 | ||
2057 | d40d->txd.tx_submit = d40_tx_submit; | |
2058 | ||
819504f4 | 2059 | spin_unlock_irqrestore(&d40c->lock, flags); |
8d318a50 | 2060 | return &d40d->txd; |
819504f4 RV |
2061 | |
2062 | err: | |
2063 | if (d40d) | |
2064 | d40_desc_free(d40c, d40d); | |
2065 | spin_unlock_irqrestore(&d40c->lock, flags); | |
2066 | return NULL; | |
8d318a50 LW |
2067 | } |
2068 | ||
2069 | static enum dma_status d40_tx_status(struct dma_chan *chan, | |
2070 | dma_cookie_t cookie, | |
2071 | struct dma_tx_state *txstate) | |
2072 | { | |
2073 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); | |
2074 | dma_cookie_t last_used; | |
2075 | dma_cookie_t last_complete; | |
2076 | int ret; | |
2077 | ||
0d0f6b8b JA |
2078 | if (d40c->phy_chan == NULL) { |
2079 | dev_err(&d40c->chan.dev->device, | |
2080 | "[%s] Cannot read status of unallocated channel\n", | |
2081 | __func__); | |
2082 | return -EINVAL; | |
2083 | } | |
2084 | ||
8d318a50 LW |
2085 | last_complete = d40c->completed; |
2086 | last_used = chan->cookie; | |
2087 | ||
a5ebca47 JA |
2088 | if (d40_is_paused(d40c)) |
2089 | ret = DMA_PAUSED; | |
2090 | else | |
2091 | ret = dma_async_is_complete(cookie, last_complete, last_used); | |
8d318a50 | 2092 | |
a5ebca47 JA |
2093 | dma_set_tx_state(txstate, last_complete, last_used, |
2094 | stedma40_residue(chan)); | |
8d318a50 LW |
2095 | |
2096 | return ret; | |
2097 | } | |
2098 | ||
2099 | static void d40_issue_pending(struct dma_chan *chan) | |
2100 | { | |
2101 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); | |
2102 | unsigned long flags; | |
2103 | ||
0d0f6b8b JA |
2104 | if (d40c->phy_chan == NULL) { |
2105 | dev_err(&d40c->chan.dev->device, | |
2106 | "[%s] Channel is not allocated!\n", __func__); | |
2107 | return; | |
2108 | } | |
2109 | ||
8d318a50 LW |
2110 | spin_lock_irqsave(&d40c->lock, flags); |
2111 | ||
2112 | /* Busy means that pending jobs are already being processed */ | |
2113 | if (!d40c->busy) | |
2114 | (void) d40_queue_start(d40c); | |
2115 | ||
2116 | spin_unlock_irqrestore(&d40c->lock, flags); | |
2117 | } | |
2118 | ||
95e1400f LW |
2119 | /* Runtime reconfiguration extension */ |
2120 | static void d40_set_runtime_config(struct dma_chan *chan, | |
2121 | struct dma_slave_config *config) | |
2122 | { | |
2123 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); | |
2124 | struct stedma40_chan_cfg *cfg = &d40c->dma_cfg; | |
2125 | enum dma_slave_buswidth config_addr_width; | |
2126 | dma_addr_t config_addr; | |
2127 | u32 config_maxburst; | |
2128 | enum stedma40_periph_data_width addr_width; | |
2129 | int psize; | |
2130 | ||
2131 | if (config->direction == DMA_FROM_DEVICE) { | |
2132 | dma_addr_t dev_addr_rx = | |
2133 | d40c->base->plat_data->dev_rx[cfg->src_dev_type]; | |
2134 | ||
2135 | config_addr = config->src_addr; | |
2136 | if (dev_addr_rx) | |
2137 | dev_dbg(d40c->base->dev, | |
2138 | "channel has a pre-wired RX address %08x " | |
2139 | "overriding with %08x\n", | |
2140 | dev_addr_rx, config_addr); | |
2141 | if (cfg->dir != STEDMA40_PERIPH_TO_MEM) | |
2142 | dev_dbg(d40c->base->dev, | |
2143 | "channel was not configured for peripheral " | |
2144 | "to memory transfer (%d) overriding\n", | |
2145 | cfg->dir); | |
2146 | cfg->dir = STEDMA40_PERIPH_TO_MEM; | |
2147 | ||
2148 | config_addr_width = config->src_addr_width; | |
2149 | config_maxburst = config->src_maxburst; | |
2150 | ||
2151 | } else if (config->direction == DMA_TO_DEVICE) { | |
2152 | dma_addr_t dev_addr_tx = | |
2153 | d40c->base->plat_data->dev_tx[cfg->dst_dev_type]; | |
2154 | ||
2155 | config_addr = config->dst_addr; | |
2156 | if (dev_addr_tx) | |
2157 | dev_dbg(d40c->base->dev, | |
2158 | "channel has a pre-wired TX address %08x " | |
2159 | "overriding with %08x\n", | |
2160 | dev_addr_tx, config_addr); | |
2161 | if (cfg->dir != STEDMA40_MEM_TO_PERIPH) | |
2162 | dev_dbg(d40c->base->dev, | |
2163 | "channel was not configured for memory " | |
2164 | "to peripheral transfer (%d) overriding\n", | |
2165 | cfg->dir); | |
2166 | cfg->dir = STEDMA40_MEM_TO_PERIPH; | |
2167 | ||
2168 | config_addr_width = config->dst_addr_width; | |
2169 | config_maxburst = config->dst_maxburst; | |
2170 | ||
2171 | } else { | |
2172 | dev_err(d40c->base->dev, | |
2173 | "unrecognized channel direction %d\n", | |
2174 | config->direction); | |
2175 | return; | |
2176 | } | |
2177 | ||
2178 | switch (config_addr_width) { | |
2179 | case DMA_SLAVE_BUSWIDTH_1_BYTE: | |
2180 | addr_width = STEDMA40_BYTE_WIDTH; | |
2181 | break; | |
2182 | case DMA_SLAVE_BUSWIDTH_2_BYTES: | |
2183 | addr_width = STEDMA40_HALFWORD_WIDTH; | |
2184 | break; | |
2185 | case DMA_SLAVE_BUSWIDTH_4_BYTES: | |
2186 | addr_width = STEDMA40_WORD_WIDTH; | |
2187 | break; | |
2188 | case DMA_SLAVE_BUSWIDTH_8_BYTES: | |
2189 | addr_width = STEDMA40_DOUBLEWORD_WIDTH; | |
2190 | break; | |
2191 | default: | |
2192 | dev_err(d40c->base->dev, | |
2193 | "illegal peripheral address width " | |
2194 | "requested (%d)\n", | |
2195 | config->src_addr_width); | |
2196 | return; | |
2197 | } | |
2198 | ||
a59670a4 PF |
2199 | if (d40c->log_num != D40_PHY_CHAN) { |
2200 | if (config_maxburst >= 16) | |
2201 | psize = STEDMA40_PSIZE_LOG_16; | |
2202 | else if (config_maxburst >= 8) | |
2203 | psize = STEDMA40_PSIZE_LOG_8; | |
2204 | else if (config_maxburst >= 4) | |
2205 | psize = STEDMA40_PSIZE_LOG_4; | |
2206 | else | |
2207 | psize = STEDMA40_PSIZE_LOG_1; | |
2208 | } else { | |
2209 | if (config_maxburst >= 16) | |
2210 | psize = STEDMA40_PSIZE_PHY_16; | |
2211 | else if (config_maxburst >= 8) | |
2212 | psize = STEDMA40_PSIZE_PHY_8; | |
2213 | else if (config_maxburst >= 4) | |
2214 | psize = STEDMA40_PSIZE_PHY_4; | |
2215 | else | |
2216 | psize = STEDMA40_PSIZE_PHY_1; | |
2217 | } | |
95e1400f LW |
2218 | |
2219 | /* Set up all the endpoint configs */ | |
2220 | cfg->src_info.data_width = addr_width; | |
2221 | cfg->src_info.psize = psize; | |
2222 | cfg->src_info.endianess = STEDMA40_LITTLE_ENDIAN; | |
2223 | cfg->src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL; | |
2224 | cfg->dst_info.data_width = addr_width; | |
2225 | cfg->dst_info.psize = psize; | |
2226 | cfg->dst_info.endianess = STEDMA40_LITTLE_ENDIAN; | |
2227 | cfg->dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL; | |
2228 | ||
a59670a4 PF |
2229 | /* Fill in register values */ |
2230 | if (d40c->log_num != D40_PHY_CHAN) | |
2231 | d40_log_cfg(cfg, &d40c->log_def.lcsp1, &d40c->log_def.lcsp3); | |
2232 | else | |
2233 | d40_phy_cfg(cfg, &d40c->src_def_cfg, | |
2234 | &d40c->dst_def_cfg, false); | |
2235 | ||
95e1400f LW |
2236 | /* These settings will take precedence later */ |
2237 | d40c->runtime_addr = config_addr; | |
2238 | d40c->runtime_direction = config->direction; | |
2239 | dev_dbg(d40c->base->dev, | |
2240 | "configured channel %s for %s, data width %d, " | |
2241 | "maxburst %d bytes, LE, no flow control\n", | |
2242 | dma_chan_name(chan), | |
2243 | (config->direction == DMA_FROM_DEVICE) ? "RX" : "TX", | |
2244 | config_addr_width, | |
2245 | config_maxburst); | |
2246 | } | |
2247 | ||
05827630 LW |
2248 | static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, |
2249 | unsigned long arg) | |
8d318a50 LW |
2250 | { |
2251 | unsigned long flags; | |
2252 | struct d40_chan *d40c = container_of(chan, struct d40_chan, chan); | |
2253 | ||
0d0f6b8b JA |
2254 | if (d40c->phy_chan == NULL) { |
2255 | dev_err(&d40c->chan.dev->device, | |
2256 | "[%s] Channel is not allocated!\n", __func__); | |
2257 | return -EINVAL; | |
2258 | } | |
2259 | ||
8d318a50 LW |
2260 | switch (cmd) { |
2261 | case DMA_TERMINATE_ALL: | |
2262 | spin_lock_irqsave(&d40c->lock, flags); | |
2263 | d40_term_all(d40c); | |
2264 | spin_unlock_irqrestore(&d40c->lock, flags); | |
2265 | return 0; | |
2266 | case DMA_PAUSE: | |
2267 | return d40_pause(chan); | |
2268 | case DMA_RESUME: | |
2269 | return d40_resume(chan); | |
95e1400f LW |
2270 | case DMA_SLAVE_CONFIG: |
2271 | d40_set_runtime_config(chan, | |
2272 | (struct dma_slave_config *) arg); | |
2273 | return 0; | |
2274 | default: | |
2275 | break; | |
8d318a50 LW |
2276 | } |
2277 | ||
2278 | /* Other commands are unimplemented */ | |
2279 | return -ENXIO; | |
2280 | } | |
2281 | ||
2282 | /* Initialization functions */ | |
2283 | ||
2284 | static void __init d40_chan_init(struct d40_base *base, struct dma_device *dma, | |
2285 | struct d40_chan *chans, int offset, | |
2286 | int num_chans) | |
2287 | { | |
2288 | int i = 0; | |
2289 | struct d40_chan *d40c; | |
2290 | ||
2291 | INIT_LIST_HEAD(&dma->channels); | |
2292 | ||
2293 | for (i = offset; i < offset + num_chans; i++) { | |
2294 | d40c = &chans[i]; | |
2295 | d40c->base = base; | |
2296 | d40c->chan.device = dma; | |
2297 | ||
8d318a50 LW |
2298 | spin_lock_init(&d40c->lock); |
2299 | ||
2300 | d40c->log_num = D40_PHY_CHAN; | |
2301 | ||
8d318a50 LW |
2302 | INIT_LIST_HEAD(&d40c->active); |
2303 | INIT_LIST_HEAD(&d40c->queue); | |
2304 | INIT_LIST_HEAD(&d40c->client); | |
2305 | ||
8d318a50 LW |
2306 | tasklet_init(&d40c->tasklet, dma_tasklet, |
2307 | (unsigned long) d40c); | |
2308 | ||
2309 | list_add_tail(&d40c->chan.device_node, | |
2310 | &dma->channels); | |
2311 | } | |
2312 | } | |
2313 | ||
2314 | static int __init d40_dmaengine_init(struct d40_base *base, | |
2315 | int num_reserved_chans) | |
2316 | { | |
2317 | int err ; | |
2318 | ||
2319 | d40_chan_init(base, &base->dma_slave, base->log_chans, | |
2320 | 0, base->num_log_chans); | |
2321 | ||
2322 | dma_cap_zero(base->dma_slave.cap_mask); | |
2323 | dma_cap_set(DMA_SLAVE, base->dma_slave.cap_mask); | |
2324 | ||
2325 | base->dma_slave.device_alloc_chan_resources = d40_alloc_chan_resources; | |
2326 | base->dma_slave.device_free_chan_resources = d40_free_chan_resources; | |
2327 | base->dma_slave.device_prep_dma_memcpy = d40_prep_memcpy; | |
2328 | base->dma_slave.device_prep_slave_sg = d40_prep_slave_sg; | |
2329 | base->dma_slave.device_tx_status = d40_tx_status; | |
2330 | base->dma_slave.device_issue_pending = d40_issue_pending; | |
2331 | base->dma_slave.device_control = d40_control; | |
2332 | base->dma_slave.dev = base->dev; | |
2333 | ||
2334 | err = dma_async_device_register(&base->dma_slave); | |
2335 | ||
2336 | if (err) { | |
2337 | dev_err(base->dev, | |
2338 | "[%s] Failed to register slave channels\n", | |
2339 | __func__); | |
2340 | goto failure1; | |
2341 | } | |
2342 | ||
2343 | d40_chan_init(base, &base->dma_memcpy, base->log_chans, | |
2344 | base->num_log_chans, base->plat_data->memcpy_len); | |
2345 | ||
2346 | dma_cap_zero(base->dma_memcpy.cap_mask); | |
2347 | dma_cap_set(DMA_MEMCPY, base->dma_memcpy.cap_mask); | |
2348 | ||
2349 | base->dma_memcpy.device_alloc_chan_resources = d40_alloc_chan_resources; | |
2350 | base->dma_memcpy.device_free_chan_resources = d40_free_chan_resources; | |
2351 | base->dma_memcpy.device_prep_dma_memcpy = d40_prep_memcpy; | |
2352 | base->dma_memcpy.device_prep_slave_sg = d40_prep_slave_sg; | |
2353 | base->dma_memcpy.device_tx_status = d40_tx_status; | |
2354 | base->dma_memcpy.device_issue_pending = d40_issue_pending; | |
2355 | base->dma_memcpy.device_control = d40_control; | |
2356 | base->dma_memcpy.dev = base->dev; | |
2357 | /* | |
2358 | * This controller can only access address at even | |
2359 | * 32bit boundaries, i.e. 2^2 | |
2360 | */ | |
2361 | base->dma_memcpy.copy_align = 2; | |
2362 | ||
2363 | err = dma_async_device_register(&base->dma_memcpy); | |
2364 | ||
2365 | if (err) { | |
2366 | dev_err(base->dev, | |
2367 | "[%s] Failed to regsiter memcpy only channels\n", | |
2368 | __func__); | |
2369 | goto failure2; | |
2370 | } | |
2371 | ||
2372 | d40_chan_init(base, &base->dma_both, base->phy_chans, | |
2373 | 0, num_reserved_chans); | |
2374 | ||
2375 | dma_cap_zero(base->dma_both.cap_mask); | |
2376 | dma_cap_set(DMA_SLAVE, base->dma_both.cap_mask); | |
2377 | dma_cap_set(DMA_MEMCPY, base->dma_both.cap_mask); | |
2378 | ||
2379 | base->dma_both.device_alloc_chan_resources = d40_alloc_chan_resources; | |
2380 | base->dma_both.device_free_chan_resources = d40_free_chan_resources; | |
2381 | base->dma_both.device_prep_dma_memcpy = d40_prep_memcpy; | |
2382 | base->dma_both.device_prep_slave_sg = d40_prep_slave_sg; | |
2383 | base->dma_both.device_tx_status = d40_tx_status; | |
2384 | base->dma_both.device_issue_pending = d40_issue_pending; | |
2385 | base->dma_both.device_control = d40_control; | |
2386 | base->dma_both.dev = base->dev; | |
2387 | base->dma_both.copy_align = 2; | |
2388 | err = dma_async_device_register(&base->dma_both); | |
2389 | ||
2390 | if (err) { | |
2391 | dev_err(base->dev, | |
2392 | "[%s] Failed to register logical and physical capable channels\n", | |
2393 | __func__); | |
2394 | goto failure3; | |
2395 | } | |
2396 | return 0; | |
2397 | failure3: | |
2398 | dma_async_device_unregister(&base->dma_memcpy); | |
2399 | failure2: | |
2400 | dma_async_device_unregister(&base->dma_slave); | |
2401 | failure1: | |
2402 | return err; | |
2403 | } | |
2404 | ||
2405 | /* Initialization functions. */ | |
2406 | ||
2407 | static int __init d40_phy_res_init(struct d40_base *base) | |
2408 | { | |
2409 | int i; | |
2410 | int num_phy_chans_avail = 0; | |
2411 | u32 val[2]; | |
2412 | int odd_even_bit = -2; | |
2413 | ||
2414 | val[0] = readl(base->virtbase + D40_DREG_PRSME); | |
2415 | val[1] = readl(base->virtbase + D40_DREG_PRSMO); | |
2416 | ||
2417 | for (i = 0; i < base->num_phy_chans; i++) { | |
2418 | base->phy_res[i].num = i; | |
2419 | odd_even_bit += 2 * ((i % 2) == 0); | |
2420 | if (((val[i % 2] >> odd_even_bit) & 3) == 1) { | |
2421 | /* Mark security only channels as occupied */ | |
2422 | base->phy_res[i].allocated_src = D40_ALLOC_PHY; | |
2423 | base->phy_res[i].allocated_dst = D40_ALLOC_PHY; | |
2424 | } else { | |
2425 | base->phy_res[i].allocated_src = D40_ALLOC_FREE; | |
2426 | base->phy_res[i].allocated_dst = D40_ALLOC_FREE; | |
2427 | num_phy_chans_avail++; | |
2428 | } | |
2429 | spin_lock_init(&base->phy_res[i].lock); | |
2430 | } | |
6b7acd84 JA |
2431 | |
2432 | /* Mark disabled channels as occupied */ | |
2433 | for (i = 0; base->plat_data->disabled_channels[i] != -1; i++) { | |
f57b407c RV |
2434 | int chan = base->plat_data->disabled_channels[i]; |
2435 | ||
2436 | base->phy_res[chan].allocated_src = D40_ALLOC_PHY; | |
2437 | base->phy_res[chan].allocated_dst = D40_ALLOC_PHY; | |
2438 | num_phy_chans_avail--; | |
6b7acd84 JA |
2439 | } |
2440 | ||
8d318a50 LW |
2441 | dev_info(base->dev, "%d of %d physical DMA channels available\n", |
2442 | num_phy_chans_avail, base->num_phy_chans); | |
2443 | ||
2444 | /* Verify settings extended vs standard */ | |
2445 | val[0] = readl(base->virtbase + D40_DREG_PRTYP); | |
2446 | ||
2447 | for (i = 0; i < base->num_phy_chans; i++) { | |
2448 | ||
2449 | if (base->phy_res[i].allocated_src == D40_ALLOC_FREE && | |
2450 | (val[0] & 0x3) != 1) | |
2451 | dev_info(base->dev, | |
2452 | "[%s] INFO: channel %d is misconfigured (%d)\n", | |
2453 | __func__, i, val[0] & 0x3); | |
2454 | ||
2455 | val[0] = val[0] >> 2; | |
2456 | } | |
2457 | ||
2458 | return num_phy_chans_avail; | |
2459 | } | |
2460 | ||
2461 | static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev) | |
2462 | { | |
2463 | static const struct d40_reg_val dma_id_regs[] = { | |
2464 | /* Peripheral Id */ | |
2465 | { .reg = D40_DREG_PERIPHID0, .val = 0x0040}, | |
2466 | { .reg = D40_DREG_PERIPHID1, .val = 0x0000}, | |
2467 | /* | |
2468 | * D40_DREG_PERIPHID2 Depends on HW revision: | |
2469 | * MOP500/HREF ED has 0x0008, | |
2470 | * ? has 0x0018, | |
2471 | * HREF V1 has 0x0028 | |
2472 | */ | |
2473 | { .reg = D40_DREG_PERIPHID3, .val = 0x0000}, | |
2474 | ||
2475 | /* PCell Id */ | |
2476 | { .reg = D40_DREG_CELLID0, .val = 0x000d}, | |
2477 | { .reg = D40_DREG_CELLID1, .val = 0x00f0}, | |
2478 | { .reg = D40_DREG_CELLID2, .val = 0x0005}, | |
2479 | { .reg = D40_DREG_CELLID3, .val = 0x00b1} | |
2480 | }; | |
2481 | struct stedma40_platform_data *plat_data; | |
2482 | struct clk *clk = NULL; | |
2483 | void __iomem *virtbase = NULL; | |
2484 | struct resource *res = NULL; | |
2485 | struct d40_base *base = NULL; | |
2486 | int num_log_chans = 0; | |
2487 | int num_phy_chans; | |
2488 | int i; | |
f4185592 | 2489 | u32 val; |
3ae0267f | 2490 | u32 rev; |
8d318a50 LW |
2491 | |
2492 | clk = clk_get(&pdev->dev, NULL); | |
2493 | ||
2494 | if (IS_ERR(clk)) { | |
2495 | dev_err(&pdev->dev, "[%s] No matching clock found\n", | |
2496 | __func__); | |
2497 | goto failure; | |
2498 | } | |
2499 | ||
2500 | clk_enable(clk); | |
2501 | ||
2502 | /* Get IO for DMAC base address */ | |
2503 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "base"); | |
2504 | if (!res) | |
2505 | goto failure; | |
2506 | ||
2507 | if (request_mem_region(res->start, resource_size(res), | |
2508 | D40_NAME " I/O base") == NULL) | |
2509 | goto failure; | |
2510 | ||
2511 | virtbase = ioremap(res->start, resource_size(res)); | |
2512 | if (!virtbase) | |
2513 | goto failure; | |
2514 | ||
2515 | /* HW version check */ | |
2516 | for (i = 0; i < ARRAY_SIZE(dma_id_regs); i++) { | |
2517 | if (dma_id_regs[i].val != | |
2518 | readl(virtbase + dma_id_regs[i].reg)) { | |
2519 | dev_err(&pdev->dev, | |
2520 | "[%s] Unknown hardware! Expected 0x%x at 0x%x but got 0x%x\n", | |
2521 | __func__, | |
2522 | dma_id_regs[i].val, | |
2523 | dma_id_regs[i].reg, | |
2524 | readl(virtbase + dma_id_regs[i].reg)); | |
2525 | goto failure; | |
2526 | } | |
2527 | } | |
2528 | ||
3ae0267f | 2529 | /* Get silicon revision and designer */ |
f4185592 | 2530 | val = readl(virtbase + D40_DREG_PERIPHID2); |
8d318a50 | 2531 | |
3ae0267f JA |
2532 | if ((val & D40_DREG_PERIPHID2_DESIGNER_MASK) != |
2533 | D40_HW_DESIGNER) { | |
8d318a50 LW |
2534 | dev_err(&pdev->dev, |
2535 | "[%s] Unknown designer! Got %x wanted %x\n", | |
3ae0267f JA |
2536 | __func__, val & D40_DREG_PERIPHID2_DESIGNER_MASK, |
2537 | D40_HW_DESIGNER); | |
8d318a50 LW |
2538 | goto failure; |
2539 | } | |
2540 | ||
3ae0267f JA |
2541 | rev = (val & D40_DREG_PERIPHID2_REV_MASK) >> |
2542 | D40_DREG_PERIPHID2_REV_POS; | |
2543 | ||
8d318a50 LW |
2544 | /* The number of physical channels on this HW */ |
2545 | num_phy_chans = 4 * (readl(virtbase + D40_DREG_ICFG) & 0x7) + 4; | |
2546 | ||
2547 | dev_info(&pdev->dev, "hardware revision: %d @ 0x%x\n", | |
3ae0267f | 2548 | rev, res->start); |
8d318a50 LW |
2549 | |
2550 | plat_data = pdev->dev.platform_data; | |
2551 | ||
2552 | /* Count the number of logical channels in use */ | |
2553 | for (i = 0; i < plat_data->dev_len; i++) | |
2554 | if (plat_data->dev_rx[i] != 0) | |
2555 | num_log_chans++; | |
2556 | ||
2557 | for (i = 0; i < plat_data->dev_len; i++) | |
2558 | if (plat_data->dev_tx[i] != 0) | |
2559 | num_log_chans++; | |
2560 | ||
2561 | base = kzalloc(ALIGN(sizeof(struct d40_base), 4) + | |
2562 | (num_phy_chans + num_log_chans + plat_data->memcpy_len) * | |
2563 | sizeof(struct d40_chan), GFP_KERNEL); | |
2564 | ||
2565 | if (base == NULL) { | |
2566 | dev_err(&pdev->dev, "[%s] Out of memory\n", __func__); | |
2567 | goto failure; | |
2568 | } | |
2569 | ||
3ae0267f | 2570 | base->rev = rev; |
8d318a50 LW |
2571 | base->clk = clk; |
2572 | base->num_phy_chans = num_phy_chans; | |
2573 | base->num_log_chans = num_log_chans; | |
2574 | base->phy_start = res->start; | |
2575 | base->phy_size = resource_size(res); | |
2576 | base->virtbase = virtbase; | |
2577 | base->plat_data = plat_data; | |
2578 | base->dev = &pdev->dev; | |
2579 | base->phy_chans = ((void *)base) + ALIGN(sizeof(struct d40_base), 4); | |
2580 | base->log_chans = &base->phy_chans[num_phy_chans]; | |
2581 | ||
2582 | base->phy_res = kzalloc(num_phy_chans * sizeof(struct d40_phy_res), | |
2583 | GFP_KERNEL); | |
2584 | if (!base->phy_res) | |
2585 | goto failure; | |
2586 | ||
2587 | base->lookup_phy_chans = kzalloc(num_phy_chans * | |
2588 | sizeof(struct d40_chan *), | |
2589 | GFP_KERNEL); | |
2590 | if (!base->lookup_phy_chans) | |
2591 | goto failure; | |
2592 | ||
2593 | if (num_log_chans + plat_data->memcpy_len) { | |
2594 | /* | |
2595 | * The max number of logical channels are event lines for all | |
2596 | * src devices and dst devices | |
2597 | */ | |
2598 | base->lookup_log_chans = kzalloc(plat_data->dev_len * 2 * | |
2599 | sizeof(struct d40_chan *), | |
2600 | GFP_KERNEL); | |
2601 | if (!base->lookup_log_chans) | |
2602 | goto failure; | |
2603 | } | |
698e4732 JA |
2604 | |
2605 | base->lcla_pool.alloc_map = kzalloc(num_phy_chans * | |
2606 | sizeof(struct d40_desc *) * | |
2607 | D40_LCLA_LINK_PER_EVENT_GRP, | |
8d318a50 LW |
2608 | GFP_KERNEL); |
2609 | if (!base->lcla_pool.alloc_map) | |
2610 | goto failure; | |
2611 | ||
c675b1b4 JA |
2612 | base->desc_slab = kmem_cache_create(D40_NAME, sizeof(struct d40_desc), |
2613 | 0, SLAB_HWCACHE_ALIGN, | |
2614 | NULL); | |
2615 | if (base->desc_slab == NULL) | |
2616 | goto failure; | |
2617 | ||
8d318a50 LW |
2618 | return base; |
2619 | ||
2620 | failure: | |
c6134c96 | 2621 | if (!IS_ERR(clk)) { |
8d318a50 LW |
2622 | clk_disable(clk); |
2623 | clk_put(clk); | |
2624 | } | |
2625 | if (virtbase) | |
2626 | iounmap(virtbase); | |
2627 | if (res) | |
2628 | release_mem_region(res->start, | |
2629 | resource_size(res)); | |
2630 | if (virtbase) | |
2631 | iounmap(virtbase); | |
2632 | ||
2633 | if (base) { | |
2634 | kfree(base->lcla_pool.alloc_map); | |
2635 | kfree(base->lookup_log_chans); | |
2636 | kfree(base->lookup_phy_chans); | |
2637 | kfree(base->phy_res); | |
2638 | kfree(base); | |
2639 | } | |
2640 | ||
2641 | return NULL; | |
2642 | } | |
2643 | ||
2644 | static void __init d40_hw_init(struct d40_base *base) | |
2645 | { | |
2646 | ||
2647 | static const struct d40_reg_val dma_init_reg[] = { | |
2648 | /* Clock every part of the DMA block from start */ | |
2649 | { .reg = D40_DREG_GCC, .val = 0x0000ff01}, | |
2650 | ||
2651 | /* Interrupts on all logical channels */ | |
2652 | { .reg = D40_DREG_LCMIS0, .val = 0xFFFFFFFF}, | |
2653 | { .reg = D40_DREG_LCMIS1, .val = 0xFFFFFFFF}, | |
2654 | { .reg = D40_DREG_LCMIS2, .val = 0xFFFFFFFF}, | |
2655 | { .reg = D40_DREG_LCMIS3, .val = 0xFFFFFFFF}, | |
2656 | { .reg = D40_DREG_LCICR0, .val = 0xFFFFFFFF}, | |
2657 | { .reg = D40_DREG_LCICR1, .val = 0xFFFFFFFF}, | |
2658 | { .reg = D40_DREG_LCICR2, .val = 0xFFFFFFFF}, | |
2659 | { .reg = D40_DREG_LCICR3, .val = 0xFFFFFFFF}, | |
2660 | { .reg = D40_DREG_LCTIS0, .val = 0xFFFFFFFF}, | |
2661 | { .reg = D40_DREG_LCTIS1, .val = 0xFFFFFFFF}, | |
2662 | { .reg = D40_DREG_LCTIS2, .val = 0xFFFFFFFF}, | |
2663 | { .reg = D40_DREG_LCTIS3, .val = 0xFFFFFFFF} | |
2664 | }; | |
2665 | int i; | |
2666 | u32 prmseo[2] = {0, 0}; | |
2667 | u32 activeo[2] = {0xFFFFFFFF, 0xFFFFFFFF}; | |
2668 | u32 pcmis = 0; | |
2669 | u32 pcicr = 0; | |
2670 | ||
2671 | for (i = 0; i < ARRAY_SIZE(dma_init_reg); i++) | |
2672 | writel(dma_init_reg[i].val, | |
2673 | base->virtbase + dma_init_reg[i].reg); | |
2674 | ||
2675 | /* Configure all our dma channels to default settings */ | |
2676 | for (i = 0; i < base->num_phy_chans; i++) { | |
2677 | ||
2678 | activeo[i % 2] = activeo[i % 2] << 2; | |
2679 | ||
2680 | if (base->phy_res[base->num_phy_chans - i - 1].allocated_src | |
2681 | == D40_ALLOC_PHY) { | |
2682 | activeo[i % 2] |= 3; | |
2683 | continue; | |
2684 | } | |
2685 | ||
2686 | /* Enable interrupt # */ | |
2687 | pcmis = (pcmis << 1) | 1; | |
2688 | ||
2689 | /* Clear interrupt # */ | |
2690 | pcicr = (pcicr << 1) | 1; | |
2691 | ||
2692 | /* Set channel to physical mode */ | |
2693 | prmseo[i % 2] = prmseo[i % 2] << 2; | |
2694 | prmseo[i % 2] |= 1; | |
2695 | ||
2696 | } | |
2697 | ||
2698 | writel(prmseo[1], base->virtbase + D40_DREG_PRMSE); | |
2699 | writel(prmseo[0], base->virtbase + D40_DREG_PRMSO); | |
2700 | writel(activeo[1], base->virtbase + D40_DREG_ACTIVE); | |
2701 | writel(activeo[0], base->virtbase + D40_DREG_ACTIVO); | |
2702 | ||
2703 | /* Write which interrupt to enable */ | |
2704 | writel(pcmis, base->virtbase + D40_DREG_PCMIS); | |
2705 | ||
2706 | /* Write which interrupt to clear */ | |
2707 | writel(pcicr, base->virtbase + D40_DREG_PCICR); | |
2708 | ||
2709 | } | |
2710 | ||
508849ad LW |
2711 | static int __init d40_lcla_allocate(struct d40_base *base) |
2712 | { | |
2713 | unsigned long *page_list; | |
2714 | int i, j; | |
2715 | int ret = 0; | |
2716 | ||
2717 | /* | |
2718 | * This is somewhat ugly. We need 8192 bytes that are 18 bit aligned, | |
2719 | * To full fill this hardware requirement without wasting 256 kb | |
2720 | * we allocate pages until we get an aligned one. | |
2721 | */ | |
2722 | page_list = kmalloc(sizeof(unsigned long) * MAX_LCLA_ALLOC_ATTEMPTS, | |
2723 | GFP_KERNEL); | |
2724 | ||
2725 | if (!page_list) { | |
2726 | ret = -ENOMEM; | |
2727 | goto failure; | |
2728 | } | |
2729 | ||
2730 | /* Calculating how many pages that are required */ | |
2731 | base->lcla_pool.pages = SZ_1K * base->num_phy_chans / PAGE_SIZE; | |
2732 | ||
2733 | for (i = 0; i < MAX_LCLA_ALLOC_ATTEMPTS; i++) { | |
2734 | page_list[i] = __get_free_pages(GFP_KERNEL, | |
2735 | base->lcla_pool.pages); | |
2736 | if (!page_list[i]) { | |
2737 | ||
2738 | dev_err(base->dev, | |
2739 | "[%s] Failed to allocate %d pages.\n", | |
2740 | __func__, base->lcla_pool.pages); | |
2741 | ||
2742 | for (j = 0; j < i; j++) | |
2743 | free_pages(page_list[j], base->lcla_pool.pages); | |
2744 | goto failure; | |
2745 | } | |
2746 | ||
2747 | if ((virt_to_phys((void *)page_list[i]) & | |
2748 | (LCLA_ALIGNMENT - 1)) == 0) | |
2749 | break; | |
2750 | } | |
2751 | ||
2752 | for (j = 0; j < i; j++) | |
2753 | free_pages(page_list[j], base->lcla_pool.pages); | |
2754 | ||
2755 | if (i < MAX_LCLA_ALLOC_ATTEMPTS) { | |
2756 | base->lcla_pool.base = (void *)page_list[i]; | |
2757 | } else { | |
767a9675 JA |
2758 | /* |
2759 | * After many attempts and no succees with finding the correct | |
2760 | * alignment, try with allocating a big buffer. | |
2761 | */ | |
508849ad LW |
2762 | dev_warn(base->dev, |
2763 | "[%s] Failed to get %d pages @ 18 bit align.\n", | |
2764 | __func__, base->lcla_pool.pages); | |
2765 | base->lcla_pool.base_unaligned = kmalloc(SZ_1K * | |
2766 | base->num_phy_chans + | |
2767 | LCLA_ALIGNMENT, | |
2768 | GFP_KERNEL); | |
2769 | if (!base->lcla_pool.base_unaligned) { | |
2770 | ret = -ENOMEM; | |
2771 | goto failure; | |
2772 | } | |
2773 | ||
2774 | base->lcla_pool.base = PTR_ALIGN(base->lcla_pool.base_unaligned, | |
2775 | LCLA_ALIGNMENT); | |
2776 | } | |
2777 | ||
2778 | writel(virt_to_phys(base->lcla_pool.base), | |
2779 | base->virtbase + D40_DREG_LCLA); | |
2780 | failure: | |
2781 | kfree(page_list); | |
2782 | return ret; | |
2783 | } | |
2784 | ||
8d318a50 LW |
2785 | static int __init d40_probe(struct platform_device *pdev) |
2786 | { | |
2787 | int err; | |
2788 | int ret = -ENOENT; | |
2789 | struct d40_base *base; | |
2790 | struct resource *res = NULL; | |
2791 | int num_reserved_chans; | |
2792 | u32 val; | |
2793 | ||
2794 | base = d40_hw_detect_init(pdev); | |
2795 | ||
2796 | if (!base) | |
2797 | goto failure; | |
2798 | ||
2799 | num_reserved_chans = d40_phy_res_init(base); | |
2800 | ||
2801 | platform_set_drvdata(pdev, base); | |
2802 | ||
2803 | spin_lock_init(&base->interrupt_lock); | |
2804 | spin_lock_init(&base->execmd_lock); | |
2805 | ||
2806 | /* Get IO for logical channel parameter address */ | |
2807 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lcpa"); | |
2808 | if (!res) { | |
2809 | ret = -ENOENT; | |
2810 | dev_err(&pdev->dev, | |
2811 | "[%s] No \"lcpa\" memory resource\n", | |
2812 | __func__); | |
2813 | goto failure; | |
2814 | } | |
2815 | base->lcpa_size = resource_size(res); | |
2816 | base->phy_lcpa = res->start; | |
2817 | ||
2818 | if (request_mem_region(res->start, resource_size(res), | |
2819 | D40_NAME " I/O lcpa") == NULL) { | |
2820 | ret = -EBUSY; | |
2821 | dev_err(&pdev->dev, | |
2822 | "[%s] Failed to request LCPA region 0x%x-0x%x\n", | |
2823 | __func__, res->start, res->end); | |
2824 | goto failure; | |
2825 | } | |
2826 | ||
2827 | /* We make use of ESRAM memory for this. */ | |
2828 | val = readl(base->virtbase + D40_DREG_LCPA); | |
2829 | if (res->start != val && val != 0) { | |
2830 | dev_warn(&pdev->dev, | |
2831 | "[%s] Mismatch LCPA dma 0x%x, def 0x%x\n", | |
2832 | __func__, val, res->start); | |
2833 | } else | |
2834 | writel(res->start, base->virtbase + D40_DREG_LCPA); | |
2835 | ||
2836 | base->lcpa_base = ioremap(res->start, resource_size(res)); | |
2837 | if (!base->lcpa_base) { | |
2838 | ret = -ENOMEM; | |
2839 | dev_err(&pdev->dev, | |
2840 | "[%s] Failed to ioremap LCPA region\n", | |
2841 | __func__); | |
2842 | goto failure; | |
2843 | } | |
8d318a50 | 2844 | |
508849ad LW |
2845 | ret = d40_lcla_allocate(base); |
2846 | if (ret) { | |
2847 | dev_err(&pdev->dev, "[%s] Failed to allocate LCLA area\n", | |
2848 | __func__); | |
8d318a50 LW |
2849 | goto failure; |
2850 | } | |
2851 | ||
2852 | spin_lock_init(&base->lcla_pool.lock); | |
2853 | ||
8d318a50 LW |
2854 | base->irq = platform_get_irq(pdev, 0); |
2855 | ||
2856 | ret = request_irq(base->irq, d40_handle_interrupt, 0, D40_NAME, base); | |
2857 | ||
2858 | if (ret) { | |
2859 | dev_err(&pdev->dev, "[%s] No IRQ defined\n", __func__); | |
2860 | goto failure; | |
2861 | } | |
2862 | ||
2863 | err = d40_dmaengine_init(base, num_reserved_chans); | |
2864 | if (err) | |
2865 | goto failure; | |
2866 | ||
2867 | d40_hw_init(base); | |
2868 | ||
2869 | dev_info(base->dev, "initialized\n"); | |
2870 | return 0; | |
2871 | ||
2872 | failure: | |
2873 | if (base) { | |
c675b1b4 JA |
2874 | if (base->desc_slab) |
2875 | kmem_cache_destroy(base->desc_slab); | |
8d318a50 LW |
2876 | if (base->virtbase) |
2877 | iounmap(base->virtbase); | |
508849ad LW |
2878 | if (!base->lcla_pool.base_unaligned && base->lcla_pool.base) |
2879 | free_pages((unsigned long)base->lcla_pool.base, | |
2880 | base->lcla_pool.pages); | |
767a9675 JA |
2881 | |
2882 | kfree(base->lcla_pool.base_unaligned); | |
2883 | ||
8d318a50 LW |
2884 | if (base->phy_lcpa) |
2885 | release_mem_region(base->phy_lcpa, | |
2886 | base->lcpa_size); | |
2887 | if (base->phy_start) | |
2888 | release_mem_region(base->phy_start, | |
2889 | base->phy_size); | |
2890 | if (base->clk) { | |
2891 | clk_disable(base->clk); | |
2892 | clk_put(base->clk); | |
2893 | } | |
2894 | ||
2895 | kfree(base->lcla_pool.alloc_map); | |
2896 | kfree(base->lookup_log_chans); | |
2897 | kfree(base->lookup_phy_chans); | |
2898 | kfree(base->phy_res); | |
2899 | kfree(base); | |
2900 | } | |
2901 | ||
2902 | dev_err(&pdev->dev, "[%s] probe failed\n", __func__); | |
2903 | return ret; | |
2904 | } | |
2905 | ||
2906 | static struct platform_driver d40_driver = { | |
2907 | .driver = { | |
2908 | .owner = THIS_MODULE, | |
2909 | .name = D40_NAME, | |
2910 | }, | |
2911 | }; | |
2912 | ||
2913 | int __init stedma40_init(void) | |
2914 | { | |
2915 | return platform_driver_probe(&d40_driver, d40_probe); | |
2916 | } | |
2917 | arch_initcall(stedma40_init); |