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9b3b8171 BW |
1 | /* |
2 | * Copyright (C) 2017 Spreadtrum Communications Inc. | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0 | |
5 | */ | |
6 | ||
7 | #include <linux/clk.h> | |
8 | #include <linux/dma-mapping.h> | |
ab42ddb9 | 9 | #include <linux/dma/sprd-dma.h> |
9b3b8171 BW |
10 | #include <linux/errno.h> |
11 | #include <linux/init.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/io.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/of.h> | |
17 | #include <linux/of_dma.h> | |
18 | #include <linux/of_device.h> | |
19 | #include <linux/pm_runtime.h> | |
20 | #include <linux/slab.h> | |
21 | ||
22 | #include "virt-dma.h" | |
23 | ||
24 | #define SPRD_DMA_CHN_REG_OFFSET 0x1000 | |
25 | #define SPRD_DMA_CHN_REG_LENGTH 0x40 | |
26 | #define SPRD_DMA_MEMCPY_MIN_SIZE 64 | |
27 | ||
28 | /* DMA global registers definition */ | |
29 | #define SPRD_DMA_GLB_PAUSE 0x0 | |
30 | #define SPRD_DMA_GLB_FRAG_WAIT 0x4 | |
31 | #define SPRD_DMA_GLB_REQ_PEND0_EN 0x8 | |
32 | #define SPRD_DMA_GLB_REQ_PEND1_EN 0xc | |
33 | #define SPRD_DMA_GLB_INT_RAW_STS 0x10 | |
34 | #define SPRD_DMA_GLB_INT_MSK_STS 0x14 | |
35 | #define SPRD_DMA_GLB_REQ_STS 0x18 | |
36 | #define SPRD_DMA_GLB_CHN_EN_STS 0x1c | |
37 | #define SPRD_DMA_GLB_DEBUG_STS 0x20 | |
38 | #define SPRD_DMA_GLB_ARB_SEL_STS 0x24 | |
770399df EL |
39 | #define SPRD_DMA_GLB_2STAGE_GRP1 0x28 |
40 | #define SPRD_DMA_GLB_2STAGE_GRP2 0x2c | |
9b3b8171 BW |
41 | #define SPRD_DMA_GLB_REQ_UID(uid) (0x4 * ((uid) - 1)) |
42 | #define SPRD_DMA_GLB_REQ_UID_OFFSET 0x2000 | |
43 | ||
44 | /* DMA channel registers definition */ | |
45 | #define SPRD_DMA_CHN_PAUSE 0x0 | |
46 | #define SPRD_DMA_CHN_REQ 0x4 | |
47 | #define SPRD_DMA_CHN_CFG 0x8 | |
48 | #define SPRD_DMA_CHN_INTC 0xc | |
49 | #define SPRD_DMA_CHN_SRC_ADDR 0x10 | |
50 | #define SPRD_DMA_CHN_DES_ADDR 0x14 | |
51 | #define SPRD_DMA_CHN_FRG_LEN 0x18 | |
52 | #define SPRD_DMA_CHN_BLK_LEN 0x1c | |
53 | #define SPRD_DMA_CHN_TRSC_LEN 0x20 | |
54 | #define SPRD_DMA_CHN_TRSF_STEP 0x24 | |
55 | #define SPRD_DMA_CHN_WARP_PTR 0x28 | |
56 | #define SPRD_DMA_CHN_WARP_TO 0x2c | |
57 | #define SPRD_DMA_CHN_LLIST_PTR 0x30 | |
58 | #define SPRD_DMA_CHN_FRAG_STEP 0x34 | |
59 | #define SPRD_DMA_CHN_SRC_BLK_STEP 0x38 | |
60 | #define SPRD_DMA_CHN_DES_BLK_STEP 0x3c | |
61 | ||
770399df EL |
62 | /* SPRD_DMA_GLB_2STAGE_GRP register definition */ |
63 | #define SPRD_DMA_GLB_2STAGE_EN BIT(24) | |
64 | #define SPRD_DMA_GLB_CHN_INT_MASK GENMASK(23, 20) | |
9bb9fe0c BW |
65 | #define SPRD_DMA_GLB_DEST_INT BIT(22) |
66 | #define SPRD_DMA_GLB_SRC_INT BIT(20) | |
770399df EL |
67 | #define SPRD_DMA_GLB_LIST_DONE_TRG BIT(19) |
68 | #define SPRD_DMA_GLB_TRANS_DONE_TRG BIT(18) | |
69 | #define SPRD_DMA_GLB_BLOCK_DONE_TRG BIT(17) | |
70 | #define SPRD_DMA_GLB_FRAG_DONE_TRG BIT(16) | |
71 | #define SPRD_DMA_GLB_TRG_OFFSET 16 | |
72 | #define SPRD_DMA_GLB_DEST_CHN_MASK GENMASK(13, 8) | |
73 | #define SPRD_DMA_GLB_DEST_CHN_OFFSET 8 | |
74 | #define SPRD_DMA_GLB_SRC_CHN_MASK GENMASK(5, 0) | |
75 | ||
9b3b8171 BW |
76 | /* SPRD_DMA_CHN_INTC register definition */ |
77 | #define SPRD_DMA_INT_MASK GENMASK(4, 0) | |
78 | #define SPRD_DMA_INT_CLR_OFFSET 24 | |
79 | #define SPRD_DMA_FRAG_INT_EN BIT(0) | |
80 | #define SPRD_DMA_BLK_INT_EN BIT(1) | |
81 | #define SPRD_DMA_TRANS_INT_EN BIT(2) | |
82 | #define SPRD_DMA_LIST_INT_EN BIT(3) | |
83 | #define SPRD_DMA_CFG_ERR_INT_EN BIT(4) | |
84 | ||
85 | /* SPRD_DMA_CHN_CFG register definition */ | |
86 | #define SPRD_DMA_CHN_EN BIT(0) | |
4ac69546 | 87 | #define SPRD_DMA_LINKLIST_EN BIT(4) |
9b3b8171 BW |
88 | #define SPRD_DMA_WAIT_BDONE_OFFSET 24 |
89 | #define SPRD_DMA_DONOT_WAIT_BDONE 1 | |
90 | ||
91 | /* SPRD_DMA_CHN_REQ register definition */ | |
92 | #define SPRD_DMA_REQ_EN BIT(0) | |
93 | ||
94 | /* SPRD_DMA_CHN_PAUSE register definition */ | |
95 | #define SPRD_DMA_PAUSE_EN BIT(0) | |
96 | #define SPRD_DMA_PAUSE_STS BIT(2) | |
97 | #define SPRD_DMA_PAUSE_CNT 0x2000 | |
98 | ||
99 | /* DMA_CHN_WARP_* register definition */ | |
100 | #define SPRD_DMA_HIGH_ADDR_MASK GENMASK(31, 28) | |
101 | #define SPRD_DMA_LOW_ADDR_MASK GENMASK(31, 0) | |
102 | #define SPRD_DMA_HIGH_ADDR_OFFSET 4 | |
103 | ||
104 | /* SPRD_DMA_CHN_INTC register definition */ | |
105 | #define SPRD_DMA_FRAG_INT_STS BIT(16) | |
106 | #define SPRD_DMA_BLK_INT_STS BIT(17) | |
107 | #define SPRD_DMA_TRSC_INT_STS BIT(18) | |
108 | #define SPRD_DMA_LIST_INT_STS BIT(19) | |
109 | #define SPRD_DMA_CFGERR_INT_STS BIT(20) | |
110 | #define SPRD_DMA_CHN_INT_STS \ | |
111 | (SPRD_DMA_FRAG_INT_STS | SPRD_DMA_BLK_INT_STS | \ | |
112 | SPRD_DMA_TRSC_INT_STS | SPRD_DMA_LIST_INT_STS | \ | |
113 | SPRD_DMA_CFGERR_INT_STS) | |
114 | ||
115 | /* SPRD_DMA_CHN_FRG_LEN register definition */ | |
116 | #define SPRD_DMA_SRC_DATAWIDTH_OFFSET 30 | |
117 | #define SPRD_DMA_DES_DATAWIDTH_OFFSET 28 | |
118 | #define SPRD_DMA_SWT_MODE_OFFSET 26 | |
119 | #define SPRD_DMA_REQ_MODE_OFFSET 24 | |
120 | #define SPRD_DMA_REQ_MODE_MASK GENMASK(1, 0) | |
121 | #define SPRD_DMA_FIX_SEL_OFFSET 21 | |
122 | #define SPRD_DMA_FIX_EN_OFFSET 20 | |
4ac69546 | 123 | #define SPRD_DMA_LLIST_END BIT(19) |
9b3b8171 BW |
124 | #define SPRD_DMA_FRG_LEN_MASK GENMASK(16, 0) |
125 | ||
126 | /* SPRD_DMA_CHN_BLK_LEN register definition */ | |
127 | #define SPRD_DMA_BLK_LEN_MASK GENMASK(16, 0) | |
128 | ||
129 | /* SPRD_DMA_CHN_TRSC_LEN register definition */ | |
130 | #define SPRD_DMA_TRSC_LEN_MASK GENMASK(27, 0) | |
131 | ||
132 | /* SPRD_DMA_CHN_TRSF_STEP register definition */ | |
133 | #define SPRD_DMA_DEST_TRSF_STEP_OFFSET 16 | |
134 | #define SPRD_DMA_SRC_TRSF_STEP_OFFSET 0 | |
135 | #define SPRD_DMA_TRSF_STEP_MASK GENMASK(15, 0) | |
136 | ||
770399df EL |
137 | /* define DMA channel mode & trigger mode mask */ |
138 | #define SPRD_DMA_CHN_MODE_MASK GENMASK(7, 0) | |
139 | #define SPRD_DMA_TRG_MODE_MASK GENMASK(7, 0) | |
9bb9fe0c | 140 | #define SPRD_DMA_INT_TYPE_MASK GENMASK(7, 0) |
770399df | 141 | |
6b1d255e EL |
142 | /* define the DMA transfer step type */ |
143 | #define SPRD_DMA_NONE_STEP 0 | |
144 | #define SPRD_DMA_BYTE_STEP 1 | |
145 | #define SPRD_DMA_SHORT_STEP 2 | |
146 | #define SPRD_DMA_WORD_STEP 4 | |
147 | #define SPRD_DMA_DWORD_STEP 8 | |
148 | ||
9b3b8171 BW |
149 | #define SPRD_DMA_SOFTWARE_UID 0 |
150 | ||
d7c33cf8 BW |
151 | /* dma data width values */ |
152 | enum sprd_dma_datawidth { | |
153 | SPRD_DMA_DATAWIDTH_1_BYTE, | |
154 | SPRD_DMA_DATAWIDTH_2_BYTES, | |
155 | SPRD_DMA_DATAWIDTH_4_BYTES, | |
156 | SPRD_DMA_DATAWIDTH_8_BYTES, | |
9b3b8171 BW |
157 | }; |
158 | ||
159 | /* dma channel hardware configuration */ | |
160 | struct sprd_dma_chn_hw { | |
161 | u32 pause; | |
162 | u32 req; | |
163 | u32 cfg; | |
164 | u32 intc; | |
165 | u32 src_addr; | |
166 | u32 des_addr; | |
167 | u32 frg_len; | |
168 | u32 blk_len; | |
169 | u32 trsc_len; | |
170 | u32 trsf_step; | |
171 | u32 wrap_ptr; | |
172 | u32 wrap_to; | |
173 | u32 llist_ptr; | |
174 | u32 frg_step; | |
175 | u32 src_blk_step; | |
176 | u32 des_blk_step; | |
177 | }; | |
178 | ||
179 | /* dma request description */ | |
180 | struct sprd_dma_desc { | |
181 | struct virt_dma_desc vd; | |
182 | struct sprd_dma_chn_hw chn_hw; | |
d762ab33 | 183 | enum dma_transfer_direction dir; |
9b3b8171 BW |
184 | }; |
185 | ||
186 | /* dma channel description */ | |
187 | struct sprd_dma_chn { | |
188 | struct virt_dma_chan vc; | |
189 | void __iomem *chn_base; | |
4ac69546 | 190 | struct sprd_dma_linklist linklist; |
ca1b7d3d | 191 | struct dma_slave_config slave_cfg; |
9b3b8171 BW |
192 | u32 chn_num; |
193 | u32 dev_id; | |
770399df EL |
194 | enum sprd_dma_chn_mode chn_mode; |
195 | enum sprd_dma_trg_mode trg_mode; | |
9bb9fe0c | 196 | enum sprd_dma_int_type int_type; |
9b3b8171 BW |
197 | struct sprd_dma_desc *cur_desc; |
198 | }; | |
199 | ||
200 | /* SPRD dma device */ | |
201 | struct sprd_dma_dev { | |
202 | struct dma_device dma_dev; | |
203 | void __iomem *glb_base; | |
204 | struct clk *clk; | |
205 | struct clk *ashb_clk; | |
206 | int irq; | |
207 | u32 total_chns; | |
208 | struct sprd_dma_chn channels[0]; | |
209 | }; | |
210 | ||
211 | static bool sprd_dma_filter_fn(struct dma_chan *chan, void *param); | |
212 | static struct of_dma_filter_info sprd_dma_info = { | |
213 | .filter_fn = sprd_dma_filter_fn, | |
214 | }; | |
215 | ||
216 | static inline struct sprd_dma_chn *to_sprd_dma_chan(struct dma_chan *c) | |
217 | { | |
218 | return container_of(c, struct sprd_dma_chn, vc.chan); | |
219 | } | |
220 | ||
221 | static inline struct sprd_dma_dev *to_sprd_dma_dev(struct dma_chan *c) | |
222 | { | |
223 | struct sprd_dma_chn *schan = to_sprd_dma_chan(c); | |
224 | ||
225 | return container_of(schan, struct sprd_dma_dev, channels[c->chan_id]); | |
226 | } | |
227 | ||
228 | static inline struct sprd_dma_desc *to_sprd_dma_desc(struct virt_dma_desc *vd) | |
229 | { | |
230 | return container_of(vd, struct sprd_dma_desc, vd); | |
231 | } | |
232 | ||
770399df EL |
233 | static void sprd_dma_glb_update(struct sprd_dma_dev *sdev, u32 reg, |
234 | u32 mask, u32 val) | |
235 | { | |
236 | u32 orig = readl(sdev->glb_base + reg); | |
237 | u32 tmp; | |
238 | ||
239 | tmp = (orig & ~mask) | val; | |
240 | writel(tmp, sdev->glb_base + reg); | |
241 | } | |
242 | ||
9b3b8171 BW |
243 | static void sprd_dma_chn_update(struct sprd_dma_chn *schan, u32 reg, |
244 | u32 mask, u32 val) | |
245 | { | |
246 | u32 orig = readl(schan->chn_base + reg); | |
247 | u32 tmp; | |
248 | ||
249 | tmp = (orig & ~mask) | val; | |
250 | writel(tmp, schan->chn_base + reg); | |
251 | } | |
252 | ||
253 | static int sprd_dma_enable(struct sprd_dma_dev *sdev) | |
254 | { | |
255 | int ret; | |
256 | ||
257 | ret = clk_prepare_enable(sdev->clk); | |
258 | if (ret) | |
259 | return ret; | |
260 | ||
261 | /* | |
262 | * The ashb_clk is optional and only for AGCP DMA controller, so we | |
263 | * need add one condition to check if the ashb_clk need enable. | |
264 | */ | |
265 | if (!IS_ERR(sdev->ashb_clk)) | |
266 | ret = clk_prepare_enable(sdev->ashb_clk); | |
267 | ||
268 | return ret; | |
269 | } | |
270 | ||
271 | static void sprd_dma_disable(struct sprd_dma_dev *sdev) | |
272 | { | |
273 | clk_disable_unprepare(sdev->clk); | |
274 | ||
275 | /* | |
276 | * Need to check if we need disable the optional ashb_clk for AGCP DMA. | |
277 | */ | |
278 | if (!IS_ERR(sdev->ashb_clk)) | |
279 | clk_disable_unprepare(sdev->ashb_clk); | |
280 | } | |
281 | ||
282 | static void sprd_dma_set_uid(struct sprd_dma_chn *schan) | |
283 | { | |
284 | struct sprd_dma_dev *sdev = to_sprd_dma_dev(&schan->vc.chan); | |
285 | u32 dev_id = schan->dev_id; | |
286 | ||
287 | if (dev_id != SPRD_DMA_SOFTWARE_UID) { | |
288 | u32 uid_offset = SPRD_DMA_GLB_REQ_UID_OFFSET + | |
289 | SPRD_DMA_GLB_REQ_UID(dev_id); | |
290 | ||
291 | writel(schan->chn_num + 1, sdev->glb_base + uid_offset); | |
292 | } | |
293 | } | |
294 | ||
295 | static void sprd_dma_unset_uid(struct sprd_dma_chn *schan) | |
296 | { | |
297 | struct sprd_dma_dev *sdev = to_sprd_dma_dev(&schan->vc.chan); | |
298 | u32 dev_id = schan->dev_id; | |
299 | ||
300 | if (dev_id != SPRD_DMA_SOFTWARE_UID) { | |
301 | u32 uid_offset = SPRD_DMA_GLB_REQ_UID_OFFSET + | |
302 | SPRD_DMA_GLB_REQ_UID(dev_id); | |
303 | ||
304 | writel(0, sdev->glb_base + uid_offset); | |
305 | } | |
306 | } | |
307 | ||
308 | static void sprd_dma_clear_int(struct sprd_dma_chn *schan) | |
309 | { | |
310 | sprd_dma_chn_update(schan, SPRD_DMA_CHN_INTC, | |
311 | SPRD_DMA_INT_MASK << SPRD_DMA_INT_CLR_OFFSET, | |
312 | SPRD_DMA_INT_MASK << SPRD_DMA_INT_CLR_OFFSET); | |
313 | } | |
314 | ||
315 | static void sprd_dma_enable_chn(struct sprd_dma_chn *schan) | |
316 | { | |
317 | sprd_dma_chn_update(schan, SPRD_DMA_CHN_CFG, SPRD_DMA_CHN_EN, | |
318 | SPRD_DMA_CHN_EN); | |
319 | } | |
320 | ||
321 | static void sprd_dma_disable_chn(struct sprd_dma_chn *schan) | |
322 | { | |
323 | sprd_dma_chn_update(schan, SPRD_DMA_CHN_CFG, SPRD_DMA_CHN_EN, 0); | |
324 | } | |
325 | ||
326 | static void sprd_dma_soft_request(struct sprd_dma_chn *schan) | |
327 | { | |
328 | sprd_dma_chn_update(schan, SPRD_DMA_CHN_REQ, SPRD_DMA_REQ_EN, | |
329 | SPRD_DMA_REQ_EN); | |
330 | } | |
331 | ||
332 | static void sprd_dma_pause_resume(struct sprd_dma_chn *schan, bool enable) | |
333 | { | |
334 | struct sprd_dma_dev *sdev = to_sprd_dma_dev(&schan->vc.chan); | |
335 | u32 pause, timeout = SPRD_DMA_PAUSE_CNT; | |
336 | ||
337 | if (enable) { | |
338 | sprd_dma_chn_update(schan, SPRD_DMA_CHN_PAUSE, | |
339 | SPRD_DMA_PAUSE_EN, SPRD_DMA_PAUSE_EN); | |
340 | ||
341 | do { | |
342 | pause = readl(schan->chn_base + SPRD_DMA_CHN_PAUSE); | |
343 | if (pause & SPRD_DMA_PAUSE_STS) | |
344 | break; | |
345 | ||
346 | cpu_relax(); | |
347 | } while (--timeout > 0); | |
348 | ||
349 | if (!timeout) | |
350 | dev_warn(sdev->dma_dev.dev, | |
351 | "pause dma controller timeout\n"); | |
352 | } else { | |
353 | sprd_dma_chn_update(schan, SPRD_DMA_CHN_PAUSE, | |
354 | SPRD_DMA_PAUSE_EN, 0); | |
355 | } | |
356 | } | |
357 | ||
358 | static void sprd_dma_stop_and_disable(struct sprd_dma_chn *schan) | |
359 | { | |
360 | u32 cfg = readl(schan->chn_base + SPRD_DMA_CHN_CFG); | |
361 | ||
362 | if (!(cfg & SPRD_DMA_CHN_EN)) | |
363 | return; | |
364 | ||
365 | sprd_dma_pause_resume(schan, true); | |
366 | sprd_dma_disable_chn(schan); | |
367 | } | |
368 | ||
d762ab33 EL |
369 | static unsigned long sprd_dma_get_src_addr(struct sprd_dma_chn *schan) |
370 | { | |
371 | unsigned long addr, addr_high; | |
372 | ||
373 | addr = readl(schan->chn_base + SPRD_DMA_CHN_SRC_ADDR); | |
374 | addr_high = readl(schan->chn_base + SPRD_DMA_CHN_WARP_PTR) & | |
375 | SPRD_DMA_HIGH_ADDR_MASK; | |
376 | ||
377 | return addr | (addr_high << SPRD_DMA_HIGH_ADDR_OFFSET); | |
378 | } | |
379 | ||
9b3b8171 BW |
380 | static unsigned long sprd_dma_get_dst_addr(struct sprd_dma_chn *schan) |
381 | { | |
382 | unsigned long addr, addr_high; | |
383 | ||
384 | addr = readl(schan->chn_base + SPRD_DMA_CHN_DES_ADDR); | |
385 | addr_high = readl(schan->chn_base + SPRD_DMA_CHN_WARP_TO) & | |
386 | SPRD_DMA_HIGH_ADDR_MASK; | |
387 | ||
388 | return addr | (addr_high << SPRD_DMA_HIGH_ADDR_OFFSET); | |
389 | } | |
390 | ||
391 | static enum sprd_dma_int_type sprd_dma_get_int_type(struct sprd_dma_chn *schan) | |
392 | { | |
393 | struct sprd_dma_dev *sdev = to_sprd_dma_dev(&schan->vc.chan); | |
394 | u32 intc_sts = readl(schan->chn_base + SPRD_DMA_CHN_INTC) & | |
395 | SPRD_DMA_CHN_INT_STS; | |
396 | ||
397 | switch (intc_sts) { | |
398 | case SPRD_DMA_CFGERR_INT_STS: | |
399 | return SPRD_DMA_CFGERR_INT; | |
400 | ||
401 | case SPRD_DMA_LIST_INT_STS: | |
402 | return SPRD_DMA_LIST_INT; | |
403 | ||
404 | case SPRD_DMA_TRSC_INT_STS: | |
405 | return SPRD_DMA_TRANS_INT; | |
406 | ||
407 | case SPRD_DMA_BLK_INT_STS: | |
408 | return SPRD_DMA_BLK_INT; | |
409 | ||
410 | case SPRD_DMA_FRAG_INT_STS: | |
411 | return SPRD_DMA_FRAG_INT; | |
412 | ||
413 | default: | |
414 | dev_warn(sdev->dma_dev.dev, "incorrect dma interrupt type\n"); | |
415 | return SPRD_DMA_NO_INT; | |
416 | } | |
417 | } | |
418 | ||
419 | static enum sprd_dma_req_mode sprd_dma_get_req_type(struct sprd_dma_chn *schan) | |
420 | { | |
421 | u32 frag_reg = readl(schan->chn_base + SPRD_DMA_CHN_FRG_LEN); | |
422 | ||
423 | return (frag_reg >> SPRD_DMA_REQ_MODE_OFFSET) & SPRD_DMA_REQ_MODE_MASK; | |
424 | } | |
425 | ||
770399df EL |
426 | static int sprd_dma_set_2stage_config(struct sprd_dma_chn *schan) |
427 | { | |
428 | struct sprd_dma_dev *sdev = to_sprd_dma_dev(&schan->vc.chan); | |
429 | u32 val, chn = schan->chn_num + 1; | |
430 | ||
431 | switch (schan->chn_mode) { | |
432 | case SPRD_DMA_SRC_CHN0: | |
433 | val = chn & SPRD_DMA_GLB_SRC_CHN_MASK; | |
434 | val |= BIT(schan->trg_mode - 1) << SPRD_DMA_GLB_TRG_OFFSET; | |
435 | val |= SPRD_DMA_GLB_2STAGE_EN; | |
9bb9fe0c BW |
436 | if (schan->int_type != SPRD_DMA_NO_INT) |
437 | val |= SPRD_DMA_GLB_SRC_INT; | |
438 | ||
770399df EL |
439 | sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP1, val, val); |
440 | break; | |
441 | ||
442 | case SPRD_DMA_SRC_CHN1: | |
443 | val = chn & SPRD_DMA_GLB_SRC_CHN_MASK; | |
444 | val |= BIT(schan->trg_mode - 1) << SPRD_DMA_GLB_TRG_OFFSET; | |
445 | val |= SPRD_DMA_GLB_2STAGE_EN; | |
9bb9fe0c BW |
446 | if (schan->int_type != SPRD_DMA_NO_INT) |
447 | val |= SPRD_DMA_GLB_SRC_INT; | |
448 | ||
770399df EL |
449 | sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP2, val, val); |
450 | break; | |
451 | ||
452 | case SPRD_DMA_DST_CHN0: | |
453 | val = (chn << SPRD_DMA_GLB_DEST_CHN_OFFSET) & | |
454 | SPRD_DMA_GLB_DEST_CHN_MASK; | |
455 | val |= SPRD_DMA_GLB_2STAGE_EN; | |
9bb9fe0c BW |
456 | if (schan->int_type != SPRD_DMA_NO_INT) |
457 | val |= SPRD_DMA_GLB_DEST_INT; | |
458 | ||
770399df EL |
459 | sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP1, val, val); |
460 | break; | |
461 | ||
462 | case SPRD_DMA_DST_CHN1: | |
463 | val = (chn << SPRD_DMA_GLB_DEST_CHN_OFFSET) & | |
464 | SPRD_DMA_GLB_DEST_CHN_MASK; | |
465 | val |= SPRD_DMA_GLB_2STAGE_EN; | |
9bb9fe0c BW |
466 | if (schan->int_type != SPRD_DMA_NO_INT) |
467 | val |= SPRD_DMA_GLB_DEST_INT; | |
468 | ||
770399df EL |
469 | sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP2, val, val); |
470 | break; | |
471 | ||
472 | default: | |
473 | dev_err(sdev->dma_dev.dev, "invalid channel mode setting %d\n", | |
474 | schan->chn_mode); | |
475 | return -EINVAL; | |
476 | } | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
9b3b8171 BW |
481 | static void sprd_dma_set_chn_config(struct sprd_dma_chn *schan, |
482 | struct sprd_dma_desc *sdesc) | |
483 | { | |
484 | struct sprd_dma_chn_hw *cfg = &sdesc->chn_hw; | |
485 | ||
486 | writel(cfg->pause, schan->chn_base + SPRD_DMA_CHN_PAUSE); | |
487 | writel(cfg->cfg, schan->chn_base + SPRD_DMA_CHN_CFG); | |
488 | writel(cfg->intc, schan->chn_base + SPRD_DMA_CHN_INTC); | |
489 | writel(cfg->src_addr, schan->chn_base + SPRD_DMA_CHN_SRC_ADDR); | |
490 | writel(cfg->des_addr, schan->chn_base + SPRD_DMA_CHN_DES_ADDR); | |
491 | writel(cfg->frg_len, schan->chn_base + SPRD_DMA_CHN_FRG_LEN); | |
492 | writel(cfg->blk_len, schan->chn_base + SPRD_DMA_CHN_BLK_LEN); | |
493 | writel(cfg->trsc_len, schan->chn_base + SPRD_DMA_CHN_TRSC_LEN); | |
494 | writel(cfg->trsf_step, schan->chn_base + SPRD_DMA_CHN_TRSF_STEP); | |
495 | writel(cfg->wrap_ptr, schan->chn_base + SPRD_DMA_CHN_WARP_PTR); | |
496 | writel(cfg->wrap_to, schan->chn_base + SPRD_DMA_CHN_WARP_TO); | |
497 | writel(cfg->llist_ptr, schan->chn_base + SPRD_DMA_CHN_LLIST_PTR); | |
498 | writel(cfg->frg_step, schan->chn_base + SPRD_DMA_CHN_FRAG_STEP); | |
499 | writel(cfg->src_blk_step, schan->chn_base + SPRD_DMA_CHN_SRC_BLK_STEP); | |
500 | writel(cfg->des_blk_step, schan->chn_base + SPRD_DMA_CHN_DES_BLK_STEP); | |
501 | writel(cfg->req, schan->chn_base + SPRD_DMA_CHN_REQ); | |
502 | } | |
503 | ||
504 | static void sprd_dma_start(struct sprd_dma_chn *schan) | |
505 | { | |
506 | struct virt_dma_desc *vd = vchan_next_desc(&schan->vc); | |
507 | ||
508 | if (!vd) | |
509 | return; | |
510 | ||
511 | list_del(&vd->node); | |
512 | schan->cur_desc = to_sprd_dma_desc(vd); | |
513 | ||
770399df EL |
514 | /* |
515 | * Set 2-stage configuration if the channel starts one 2-stage | |
516 | * transfer. | |
517 | */ | |
518 | if (schan->chn_mode && sprd_dma_set_2stage_config(schan)) | |
519 | return; | |
520 | ||
9b3b8171 BW |
521 | /* |
522 | * Copy the DMA configuration from DMA descriptor to this hardware | |
523 | * channel. | |
524 | */ | |
525 | sprd_dma_set_chn_config(schan, schan->cur_desc); | |
526 | sprd_dma_set_uid(schan); | |
527 | sprd_dma_enable_chn(schan); | |
528 | ||
3d626a97 EL |
529 | if (schan->dev_id == SPRD_DMA_SOFTWARE_UID && |
530 | schan->chn_mode != SPRD_DMA_DST_CHN0 && | |
531 | schan->chn_mode != SPRD_DMA_DST_CHN1) | |
9b3b8171 BW |
532 | sprd_dma_soft_request(schan); |
533 | } | |
534 | ||
535 | static void sprd_dma_stop(struct sprd_dma_chn *schan) | |
536 | { | |
537 | sprd_dma_stop_and_disable(schan); | |
538 | sprd_dma_unset_uid(schan); | |
539 | sprd_dma_clear_int(schan); | |
0e5d7b1e | 540 | schan->cur_desc = NULL; |
9b3b8171 BW |
541 | } |
542 | ||
543 | static bool sprd_dma_check_trans_done(struct sprd_dma_desc *sdesc, | |
544 | enum sprd_dma_int_type int_type, | |
545 | enum sprd_dma_req_mode req_mode) | |
546 | { | |
547 | if (int_type == SPRD_DMA_NO_INT) | |
548 | return false; | |
549 | ||
550 | if (int_type >= req_mode + 1) | |
551 | return true; | |
552 | else | |
553 | return false; | |
554 | } | |
555 | ||
556 | static irqreturn_t dma_irq_handle(int irq, void *dev_id) | |
557 | { | |
558 | struct sprd_dma_dev *sdev = (struct sprd_dma_dev *)dev_id; | |
559 | u32 irq_status = readl(sdev->glb_base + SPRD_DMA_GLB_INT_MSK_STS); | |
560 | struct sprd_dma_chn *schan; | |
561 | struct sprd_dma_desc *sdesc; | |
562 | enum sprd_dma_req_mode req_type; | |
563 | enum sprd_dma_int_type int_type; | |
97dbd6ea | 564 | bool trans_done = false, cyclic = false; |
9b3b8171 BW |
565 | u32 i; |
566 | ||
567 | while (irq_status) { | |
568 | i = __ffs(irq_status); | |
569 | irq_status &= (irq_status - 1); | |
570 | schan = &sdev->channels[i]; | |
571 | ||
572 | spin_lock(&schan->vc.lock); | |
58152b0e BW |
573 | |
574 | sdesc = schan->cur_desc; | |
575 | if (!sdesc) { | |
576 | spin_unlock(&schan->vc.lock); | |
577 | return IRQ_HANDLED; | |
578 | } | |
579 | ||
9b3b8171 BW |
580 | int_type = sprd_dma_get_int_type(schan); |
581 | req_type = sprd_dma_get_req_type(schan); | |
582 | sprd_dma_clear_int(schan); | |
583 | ||
97dbd6ea EL |
584 | /* cyclic mode schedule callback */ |
585 | cyclic = schan->linklist.phy_addr ? true : false; | |
586 | if (cyclic == true) { | |
587 | vchan_cyclic_callback(&sdesc->vd); | |
588 | } else { | |
589 | /* Check if the dma request descriptor is done. */ | |
590 | trans_done = sprd_dma_check_trans_done(sdesc, int_type, | |
591 | req_type); | |
592 | if (trans_done == true) { | |
593 | vchan_cookie_complete(&sdesc->vd); | |
594 | schan->cur_desc = NULL; | |
595 | sprd_dma_start(schan); | |
596 | } | |
9b3b8171 BW |
597 | } |
598 | spin_unlock(&schan->vc.lock); | |
599 | } | |
600 | ||
601 | return IRQ_HANDLED; | |
602 | } | |
603 | ||
604 | static int sprd_dma_alloc_chan_resources(struct dma_chan *chan) | |
605 | { | |
ffb5be7c | 606 | return pm_runtime_get_sync(chan->device->dev); |
9b3b8171 BW |
607 | } |
608 | ||
609 | static void sprd_dma_free_chan_resources(struct dma_chan *chan) | |
610 | { | |
611 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
612 | unsigned long flags; | |
613 | ||
614 | spin_lock_irqsave(&schan->vc.lock, flags); | |
615 | sprd_dma_stop(schan); | |
616 | spin_unlock_irqrestore(&schan->vc.lock, flags); | |
617 | ||
618 | vchan_free_chan_resources(&schan->vc); | |
619 | pm_runtime_put(chan->device->dev); | |
620 | } | |
621 | ||
622 | static enum dma_status sprd_dma_tx_status(struct dma_chan *chan, | |
623 | dma_cookie_t cookie, | |
624 | struct dma_tx_state *txstate) | |
625 | { | |
626 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
627 | struct virt_dma_desc *vd; | |
628 | unsigned long flags; | |
629 | enum dma_status ret; | |
630 | u32 pos; | |
631 | ||
632 | ret = dma_cookie_status(chan, cookie, txstate); | |
633 | if (ret == DMA_COMPLETE || !txstate) | |
634 | return ret; | |
635 | ||
636 | spin_lock_irqsave(&schan->vc.lock, flags); | |
637 | vd = vchan_find_desc(&schan->vc, cookie); | |
638 | if (vd) { | |
639 | struct sprd_dma_desc *sdesc = to_sprd_dma_desc(vd); | |
640 | struct sprd_dma_chn_hw *hw = &sdesc->chn_hw; | |
641 | ||
642 | if (hw->trsc_len > 0) | |
643 | pos = hw->trsc_len; | |
644 | else if (hw->blk_len > 0) | |
645 | pos = hw->blk_len; | |
646 | else if (hw->frg_len > 0) | |
647 | pos = hw->frg_len; | |
648 | else | |
649 | pos = 0; | |
650 | } else if (schan->cur_desc && schan->cur_desc->vd.tx.cookie == cookie) { | |
16d0f85e | 651 | struct sprd_dma_desc *sdesc = schan->cur_desc; |
d762ab33 EL |
652 | |
653 | if (sdesc->dir == DMA_DEV_TO_MEM) | |
654 | pos = sprd_dma_get_dst_addr(schan); | |
655 | else | |
656 | pos = sprd_dma_get_src_addr(schan); | |
9b3b8171 BW |
657 | } else { |
658 | pos = 0; | |
659 | } | |
660 | spin_unlock_irqrestore(&schan->vc.lock, flags); | |
661 | ||
662 | dma_set_residue(txstate, pos); | |
663 | return ret; | |
664 | } | |
665 | ||
666 | static void sprd_dma_issue_pending(struct dma_chan *chan) | |
667 | { | |
668 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
669 | unsigned long flags; | |
670 | ||
671 | spin_lock_irqsave(&schan->vc.lock, flags); | |
672 | if (vchan_issue_pending(&schan->vc) && !schan->cur_desc) | |
673 | sprd_dma_start(schan); | |
674 | spin_unlock_irqrestore(&schan->vc.lock, flags); | |
675 | } | |
676 | ||
ca1b7d3d EL |
677 | static int sprd_dma_get_datawidth(enum dma_slave_buswidth buswidth) |
678 | { | |
679 | switch (buswidth) { | |
680 | case DMA_SLAVE_BUSWIDTH_1_BYTE: | |
681 | case DMA_SLAVE_BUSWIDTH_2_BYTES: | |
682 | case DMA_SLAVE_BUSWIDTH_4_BYTES: | |
683 | case DMA_SLAVE_BUSWIDTH_8_BYTES: | |
684 | return ffs(buswidth) - 1; | |
685 | ||
686 | default: | |
687 | return -EINVAL; | |
688 | } | |
689 | } | |
690 | ||
691 | static int sprd_dma_get_step(enum dma_slave_buswidth buswidth) | |
692 | { | |
693 | switch (buswidth) { | |
694 | case DMA_SLAVE_BUSWIDTH_1_BYTE: | |
695 | case DMA_SLAVE_BUSWIDTH_2_BYTES: | |
696 | case DMA_SLAVE_BUSWIDTH_4_BYTES: | |
697 | case DMA_SLAVE_BUSWIDTH_8_BYTES: | |
698 | return buswidth; | |
699 | ||
700 | default: | |
701 | return -EINVAL; | |
702 | } | |
703 | } | |
704 | ||
705 | static int sprd_dma_fill_desc(struct dma_chan *chan, | |
4ac69546 EL |
706 | struct sprd_dma_chn_hw *hw, |
707 | unsigned int sglen, int sg_index, | |
ca1b7d3d EL |
708 | dma_addr_t src, dma_addr_t dst, u32 len, |
709 | enum dma_transfer_direction dir, | |
710 | unsigned long flags, | |
711 | struct dma_slave_config *slave_cfg) | |
9b3b8171 BW |
712 | { |
713 | struct sprd_dma_dev *sdev = to_sprd_dma_dev(chan); | |
ca1b7d3d | 714 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); |
770399df | 715 | enum sprd_dma_chn_mode chn_mode = schan->chn_mode; |
ca1b7d3d EL |
716 | u32 req_mode = (flags >> SPRD_DMA_REQ_SHIFT) & SPRD_DMA_REQ_MODE_MASK; |
717 | u32 int_mode = flags & SPRD_DMA_INT_MASK; | |
718 | int src_datawidth, dst_datawidth, src_step, dst_step; | |
719 | u32 temp, fix_mode = 0, fix_en = 0; | |
720 | ||
721 | if (dir == DMA_MEM_TO_DEV) { | |
722 | src_step = sprd_dma_get_step(slave_cfg->src_addr_width); | |
723 | if (src_step < 0) { | |
724 | dev_err(sdev->dma_dev.dev, "invalid source step\n"); | |
725 | return src_step; | |
726 | } | |
770399df EL |
727 | |
728 | /* | |
729 | * For 2-stage transfer, destination channel step can not be 0, | |
730 | * since destination device is AON IRAM. | |
731 | */ | |
732 | if (chn_mode == SPRD_DMA_DST_CHN0 || | |
733 | chn_mode == SPRD_DMA_DST_CHN1) | |
734 | dst_step = src_step; | |
735 | else | |
736 | dst_step = SPRD_DMA_NONE_STEP; | |
9b3b8171 | 737 | } else { |
ca1b7d3d EL |
738 | dst_step = sprd_dma_get_step(slave_cfg->dst_addr_width); |
739 | if (dst_step < 0) { | |
740 | dev_err(sdev->dma_dev.dev, "invalid destination step\n"); | |
741 | return dst_step; | |
742 | } | |
743 | src_step = SPRD_DMA_NONE_STEP; | |
9b3b8171 BW |
744 | } |
745 | ||
ca1b7d3d EL |
746 | src_datawidth = sprd_dma_get_datawidth(slave_cfg->src_addr_width); |
747 | if (src_datawidth < 0) { | |
748 | dev_err(sdev->dma_dev.dev, "invalid source datawidth\n"); | |
749 | return src_datawidth; | |
9b3b8171 BW |
750 | } |
751 | ||
ca1b7d3d EL |
752 | dst_datawidth = sprd_dma_get_datawidth(slave_cfg->dst_addr_width); |
753 | if (dst_datawidth < 0) { | |
754 | dev_err(sdev->dma_dev.dev, "invalid destination datawidth\n"); | |
755 | return dst_datawidth; | |
756 | } | |
757 | ||
758 | if (slave_cfg->slave_id) | |
759 | schan->dev_id = slave_cfg->slave_id; | |
760 | ||
9b3b8171 | 761 | hw->cfg = SPRD_DMA_DONOT_WAIT_BDONE << SPRD_DMA_WAIT_BDONE_OFFSET; |
9b3b8171 | 762 | |
ca1b7d3d EL |
763 | /* |
764 | * wrap_ptr and wrap_to will save the high 4 bits source address and | |
765 | * destination address. | |
766 | */ | |
767 | hw->wrap_ptr = (src >> SPRD_DMA_HIGH_ADDR_OFFSET) & SPRD_DMA_HIGH_ADDR_MASK; | |
768 | hw->wrap_to = (dst >> SPRD_DMA_HIGH_ADDR_OFFSET) & SPRD_DMA_HIGH_ADDR_MASK; | |
769 | hw->src_addr = src & SPRD_DMA_LOW_ADDR_MASK; | |
770 | hw->des_addr = dst & SPRD_DMA_LOW_ADDR_MASK; | |
9b3b8171 | 771 | |
ca1b7d3d EL |
772 | /* |
773 | * If the src step and dst step both are 0 or both are not 0, that means | |
774 | * we can not enable the fix mode. If one is 0 and another one is not, | |
775 | * we can enable the fix mode. | |
776 | */ | |
777 | if ((src_step != 0 && dst_step != 0) || (src_step | dst_step) == 0) { | |
9b3b8171 BW |
778 | fix_en = 0; |
779 | } else { | |
780 | fix_en = 1; | |
781 | if (src_step) | |
782 | fix_mode = 1; | |
783 | else | |
784 | fix_mode = 0; | |
785 | } | |
786 | ||
ca1b7d3d | 787 | hw->intc = int_mode | SPRD_DMA_CFG_ERR_INT_EN; |
9b3b8171 | 788 | |
ca1b7d3d EL |
789 | temp = src_datawidth << SPRD_DMA_SRC_DATAWIDTH_OFFSET; |
790 | temp |= dst_datawidth << SPRD_DMA_DES_DATAWIDTH_OFFSET; | |
791 | temp |= req_mode << SPRD_DMA_REQ_MODE_OFFSET; | |
792 | temp |= fix_mode << SPRD_DMA_FIX_SEL_OFFSET; | |
793 | temp |= fix_en << SPRD_DMA_FIX_EN_OFFSET; | |
794 | temp |= slave_cfg->src_maxburst & SPRD_DMA_FRG_LEN_MASK; | |
795 | hw->frg_len = temp; | |
9b3b8171 | 796 | |
89d03b3c | 797 | hw->blk_len = slave_cfg->src_maxburst & SPRD_DMA_BLK_LEN_MASK; |
ca1b7d3d | 798 | hw->trsc_len = len & SPRD_DMA_TRSC_LEN_MASK; |
9b3b8171 | 799 | |
ca1b7d3d EL |
800 | temp = (dst_step & SPRD_DMA_TRSF_STEP_MASK) << SPRD_DMA_DEST_TRSF_STEP_OFFSET; |
801 | temp |= (src_step & SPRD_DMA_TRSF_STEP_MASK) << SPRD_DMA_SRC_TRSF_STEP_OFFSET; | |
802 | hw->trsf_step = temp; | |
9b3b8171 | 803 | |
4ac69546 EL |
804 | /* link-list configuration */ |
805 | if (schan->linklist.phy_addr) { | |
4ac69546 EL |
806 | hw->cfg |= SPRD_DMA_LINKLIST_EN; |
807 | ||
808 | /* link-list index */ | |
13e89979 EL |
809 | temp = sglen ? (sg_index + 1) % sglen : 0; |
810 | ||
4ac69546 EL |
811 | /* Next link-list configuration's physical address offset */ |
812 | temp = temp * sizeof(*hw) + SPRD_DMA_CHN_SRC_ADDR; | |
813 | /* | |
814 | * Set the link-list pointer point to next link-list | |
815 | * configuration's physical address. | |
816 | */ | |
817 | hw->llist_ptr = schan->linklist.phy_addr + temp; | |
818 | } else { | |
819 | hw->llist_ptr = 0; | |
820 | } | |
821 | ||
ca1b7d3d EL |
822 | hw->frg_step = 0; |
823 | hw->src_blk_step = 0; | |
824 | hw->des_blk_step = 0; | |
825 | return 0; | |
826 | } | |
9b3b8171 | 827 | |
4ac69546 EL |
828 | static int sprd_dma_fill_linklist_desc(struct dma_chan *chan, |
829 | unsigned int sglen, int sg_index, | |
830 | dma_addr_t src, dma_addr_t dst, u32 len, | |
831 | enum dma_transfer_direction dir, | |
832 | unsigned long flags, | |
833 | struct dma_slave_config *slave_cfg) | |
834 | { | |
835 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
836 | struct sprd_dma_chn_hw *hw; | |
837 | ||
838 | if (!schan->linklist.virt_addr) | |
839 | return -EINVAL; | |
840 | ||
841 | hw = (struct sprd_dma_chn_hw *)(schan->linklist.virt_addr + | |
842 | sg_index * sizeof(*hw)); | |
843 | ||
844 | return sprd_dma_fill_desc(chan, hw, sglen, sg_index, src, dst, len, | |
845 | dir, flags, slave_cfg); | |
846 | } | |
847 | ||
1ab8da11 | 848 | static struct dma_async_tx_descriptor * |
9b3b8171 BW |
849 | sprd_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, |
850 | size_t len, unsigned long flags) | |
851 | { | |
852 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
853 | struct sprd_dma_desc *sdesc; | |
32fa2013 EL |
854 | struct sprd_dma_chn_hw *hw; |
855 | enum sprd_dma_datawidth datawidth; | |
856 | u32 step, temp; | |
9b3b8171 | 857 | |
9b3b8171 BW |
858 | sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT); |
859 | if (!sdesc) | |
860 | return NULL; | |
9b3b8171 | 861 | |
32fa2013 | 862 | hw = &sdesc->chn_hw; |
9b3b8171 | 863 | |
32fa2013 EL |
864 | hw->cfg = SPRD_DMA_DONOT_WAIT_BDONE << SPRD_DMA_WAIT_BDONE_OFFSET; |
865 | hw->intc = SPRD_DMA_TRANS_INT | SPRD_DMA_CFG_ERR_INT_EN; | |
866 | hw->src_addr = src & SPRD_DMA_LOW_ADDR_MASK; | |
867 | hw->des_addr = dest & SPRD_DMA_LOW_ADDR_MASK; | |
868 | hw->wrap_ptr = (src >> SPRD_DMA_HIGH_ADDR_OFFSET) & | |
869 | SPRD_DMA_HIGH_ADDR_MASK; | |
870 | hw->wrap_to = (dest >> SPRD_DMA_HIGH_ADDR_OFFSET) & | |
871 | SPRD_DMA_HIGH_ADDR_MASK; | |
872 | ||
873 | if (IS_ALIGNED(len, 8)) { | |
874 | datawidth = SPRD_DMA_DATAWIDTH_8_BYTES; | |
875 | step = SPRD_DMA_DWORD_STEP; | |
876 | } else if (IS_ALIGNED(len, 4)) { | |
877 | datawidth = SPRD_DMA_DATAWIDTH_4_BYTES; | |
878 | step = SPRD_DMA_WORD_STEP; | |
879 | } else if (IS_ALIGNED(len, 2)) { | |
880 | datawidth = SPRD_DMA_DATAWIDTH_2_BYTES; | |
881 | step = SPRD_DMA_SHORT_STEP; | |
882 | } else { | |
883 | datawidth = SPRD_DMA_DATAWIDTH_1_BYTE; | |
884 | step = SPRD_DMA_BYTE_STEP; | |
9b3b8171 BW |
885 | } |
886 | ||
32fa2013 EL |
887 | temp = datawidth << SPRD_DMA_SRC_DATAWIDTH_OFFSET; |
888 | temp |= datawidth << SPRD_DMA_DES_DATAWIDTH_OFFSET; | |
889 | temp |= SPRD_DMA_TRANS_REQ << SPRD_DMA_REQ_MODE_OFFSET; | |
890 | temp |= len & SPRD_DMA_FRG_LEN_MASK; | |
891 | hw->frg_len = temp; | |
9b3b8171 | 892 | |
32fa2013 EL |
893 | hw->blk_len = len & SPRD_DMA_BLK_LEN_MASK; |
894 | hw->trsc_len = len & SPRD_DMA_TRSC_LEN_MASK; | |
9b3b8171 | 895 | |
32fa2013 EL |
896 | temp = (step & SPRD_DMA_TRSF_STEP_MASK) << SPRD_DMA_DEST_TRSF_STEP_OFFSET; |
897 | temp |= (step & SPRD_DMA_TRSF_STEP_MASK) << SPRD_DMA_SRC_TRSF_STEP_OFFSET; | |
898 | hw->trsf_step = temp; | |
899 | ||
9b3b8171 | 900 | return vchan_tx_prep(&schan->vc, &sdesc->vd, flags); |
9b3b8171 BW |
901 | } |
902 | ||
1ab8da11 | 903 | static struct dma_async_tx_descriptor * |
ca1b7d3d EL |
904 | sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, |
905 | unsigned int sglen, enum dma_transfer_direction dir, | |
906 | unsigned long flags, void *context) | |
9b3b8171 BW |
907 | { |
908 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
ca1b7d3d EL |
909 | struct dma_slave_config *slave_cfg = &schan->slave_cfg; |
910 | dma_addr_t src = 0, dst = 0; | |
689379c2 | 911 | dma_addr_t start_src = 0, start_dst = 0; |
9b3b8171 | 912 | struct sprd_dma_desc *sdesc; |
ca1b7d3d EL |
913 | struct scatterlist *sg; |
914 | u32 len = 0; | |
915 | int ret, i; | |
916 | ||
4ac69546 | 917 | if (!is_slave_direction(dir)) |
ca1b7d3d | 918 | return NULL; |
9b3b8171 | 919 | |
4ac69546 EL |
920 | if (context) { |
921 | struct sprd_dma_linklist *ll_cfg = | |
922 | (struct sprd_dma_linklist *)context; | |
923 | ||
924 | schan->linklist.phy_addr = ll_cfg->phy_addr; | |
925 | schan->linklist.virt_addr = ll_cfg->virt_addr; | |
926 | } else { | |
927 | schan->linklist.phy_addr = 0; | |
928 | schan->linklist.virt_addr = 0; | |
929 | } | |
930 | ||
9bb9fe0c BW |
931 | /* |
932 | * Set channel mode, interrupt mode and trigger mode for 2-stage | |
933 | * transfer. | |
934 | */ | |
c434e377 EL |
935 | schan->chn_mode = |
936 | (flags >> SPRD_DMA_CHN_MODE_SHIFT) & SPRD_DMA_CHN_MODE_MASK; | |
937 | schan->trg_mode = | |
938 | (flags >> SPRD_DMA_TRG_MODE_SHIFT) & SPRD_DMA_TRG_MODE_MASK; | |
9bb9fe0c | 939 | schan->int_type = flags & SPRD_DMA_INT_TYPE_MASK; |
c434e377 | 940 | |
9b3b8171 BW |
941 | sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT); |
942 | if (!sdesc) | |
943 | return NULL; | |
944 | ||
d762ab33 EL |
945 | sdesc->dir = dir; |
946 | ||
ca1b7d3d EL |
947 | for_each_sg(sgl, sg, sglen, i) { |
948 | len = sg_dma_len(sg); | |
949 | ||
950 | if (dir == DMA_MEM_TO_DEV) { | |
951 | src = sg_dma_address(sg); | |
952 | dst = slave_cfg->dst_addr; | |
953 | } else { | |
954 | src = slave_cfg->src_addr; | |
955 | dst = sg_dma_address(sg); | |
956 | } | |
4ac69546 | 957 | |
689379c2 BW |
958 | if (!i) { |
959 | start_src = src; | |
960 | start_dst = dst; | |
961 | } | |
962 | ||
4ac69546 EL |
963 | /* |
964 | * The link-list mode needs at least 2 link-list | |
965 | * configurations. If there is only one sg, it doesn't | |
966 | * need to fill the link-list configuration. | |
967 | */ | |
968 | if (sglen < 2) | |
969 | break; | |
970 | ||
971 | ret = sprd_dma_fill_linklist_desc(chan, sglen, i, src, dst, len, | |
972 | dir, flags, slave_cfg); | |
973 | if (ret) { | |
974 | kfree(sdesc); | |
975 | return NULL; | |
976 | } | |
ca1b7d3d EL |
977 | } |
978 | ||
689379c2 BW |
979 | ret = sprd_dma_fill_desc(chan, &sdesc->chn_hw, 0, 0, start_src, |
980 | start_dst, len, dir, flags, slave_cfg); | |
9b3b8171 BW |
981 | if (ret) { |
982 | kfree(sdesc); | |
983 | return NULL; | |
984 | } | |
985 | ||
986 | return vchan_tx_prep(&schan->vc, &sdesc->vd, flags); | |
987 | } | |
988 | ||
ca1b7d3d EL |
989 | static int sprd_dma_slave_config(struct dma_chan *chan, |
990 | struct dma_slave_config *config) | |
991 | { | |
992 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
993 | struct dma_slave_config *slave_cfg = &schan->slave_cfg; | |
994 | ||
ca1b7d3d EL |
995 | memcpy(slave_cfg, config, sizeof(*config)); |
996 | return 0; | |
997 | } | |
998 | ||
9b3b8171 BW |
999 | static int sprd_dma_pause(struct dma_chan *chan) |
1000 | { | |
1001 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
1002 | unsigned long flags; | |
1003 | ||
1004 | spin_lock_irqsave(&schan->vc.lock, flags); | |
1005 | sprd_dma_pause_resume(schan, true); | |
1006 | spin_unlock_irqrestore(&schan->vc.lock, flags); | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | static int sprd_dma_resume(struct dma_chan *chan) | |
1012 | { | |
1013 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
1014 | unsigned long flags; | |
1015 | ||
1016 | spin_lock_irqsave(&schan->vc.lock, flags); | |
1017 | sprd_dma_pause_resume(schan, false); | |
1018 | spin_unlock_irqrestore(&schan->vc.lock, flags); | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | static int sprd_dma_terminate_all(struct dma_chan *chan) | |
1024 | { | |
1025 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
1026 | unsigned long flags; | |
1027 | LIST_HEAD(head); | |
1028 | ||
1029 | spin_lock_irqsave(&schan->vc.lock, flags); | |
1030 | sprd_dma_stop(schan); | |
1031 | ||
1032 | vchan_get_all_descriptors(&schan->vc, &head); | |
1033 | spin_unlock_irqrestore(&schan->vc.lock, flags); | |
1034 | ||
1035 | vchan_dma_desc_free_list(&schan->vc, &head); | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | static void sprd_dma_free_desc(struct virt_dma_desc *vd) | |
1040 | { | |
1041 | struct sprd_dma_desc *sdesc = to_sprd_dma_desc(vd); | |
1042 | ||
1043 | kfree(sdesc); | |
1044 | } | |
1045 | ||
1046 | static bool sprd_dma_filter_fn(struct dma_chan *chan, void *param) | |
1047 | { | |
1048 | struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); | |
ffb5be7c | 1049 | u32 slave_id = *(u32 *)param; |
9b3b8171 | 1050 | |
ffb5be7c BW |
1051 | schan->dev_id = slave_id; |
1052 | return true; | |
9b3b8171 BW |
1053 | } |
1054 | ||
1055 | static int sprd_dma_probe(struct platform_device *pdev) | |
1056 | { | |
1057 | struct device_node *np = pdev->dev.of_node; | |
1058 | struct sprd_dma_dev *sdev; | |
1059 | struct sprd_dma_chn *dma_chn; | |
1060 | struct resource *res; | |
1061 | u32 chn_count; | |
1062 | int ret, i; | |
1063 | ||
1064 | ret = device_property_read_u32(&pdev->dev, "#dma-channels", &chn_count); | |
1065 | if (ret) { | |
1066 | dev_err(&pdev->dev, "get dma channels count failed\n"); | |
1067 | return ret; | |
1068 | } | |
1069 | ||
0ed2dd03 KC |
1070 | sdev = devm_kzalloc(&pdev->dev, |
1071 | struct_size(sdev, channels, chn_count), | |
9b3b8171 BW |
1072 | GFP_KERNEL); |
1073 | if (!sdev) | |
1074 | return -ENOMEM; | |
1075 | ||
1076 | sdev->clk = devm_clk_get(&pdev->dev, "enable"); | |
1077 | if (IS_ERR(sdev->clk)) { | |
1078 | dev_err(&pdev->dev, "get enable clock failed\n"); | |
1079 | return PTR_ERR(sdev->clk); | |
1080 | } | |
1081 | ||
1082 | /* ashb clock is optional for AGCP DMA */ | |
1083 | sdev->ashb_clk = devm_clk_get(&pdev->dev, "ashb_eb"); | |
1084 | if (IS_ERR(sdev->ashb_clk)) | |
1085 | dev_warn(&pdev->dev, "no optional ashb eb clock\n"); | |
1086 | ||
1087 | /* | |
1088 | * We have three DMA controllers: AP DMA, AON DMA and AGCP DMA. For AGCP | |
1089 | * DMA controller, it can or do not request the irq, which will save | |
1090 | * system power without resuming system by DMA interrupts if AGCP DMA | |
1091 | * does not request the irq. Thus the DMA interrupts property should | |
1092 | * be optional. | |
1093 | */ | |
1094 | sdev->irq = platform_get_irq(pdev, 0); | |
1095 | if (sdev->irq > 0) { | |
1096 | ret = devm_request_irq(&pdev->dev, sdev->irq, dma_irq_handle, | |
1097 | 0, "sprd_dma", (void *)sdev); | |
1098 | if (ret < 0) { | |
1099 | dev_err(&pdev->dev, "request dma irq failed\n"); | |
1100 | return ret; | |
1101 | } | |
1102 | } else { | |
1103 | dev_warn(&pdev->dev, "no interrupts for the dma controller\n"); | |
1104 | } | |
1105 | ||
1106 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
e7f063ae | 1107 | sdev->glb_base = devm_ioremap_resource(&pdev->dev, res); |
fd8d26ad DC |
1108 | if (IS_ERR(sdev->glb_base)) |
1109 | return PTR_ERR(sdev->glb_base); | |
9b3b8171 BW |
1110 | |
1111 | dma_cap_set(DMA_MEMCPY, sdev->dma_dev.cap_mask); | |
1112 | sdev->total_chns = chn_count; | |
1113 | sdev->dma_dev.chancnt = chn_count; | |
1114 | INIT_LIST_HEAD(&sdev->dma_dev.channels); | |
1115 | INIT_LIST_HEAD(&sdev->dma_dev.global_node); | |
1116 | sdev->dma_dev.dev = &pdev->dev; | |
1117 | sdev->dma_dev.device_alloc_chan_resources = sprd_dma_alloc_chan_resources; | |
1118 | sdev->dma_dev.device_free_chan_resources = sprd_dma_free_chan_resources; | |
1119 | sdev->dma_dev.device_tx_status = sprd_dma_tx_status; | |
1120 | sdev->dma_dev.device_issue_pending = sprd_dma_issue_pending; | |
1121 | sdev->dma_dev.device_prep_dma_memcpy = sprd_dma_prep_dma_memcpy; | |
ca1b7d3d EL |
1122 | sdev->dma_dev.device_prep_slave_sg = sprd_dma_prep_slave_sg; |
1123 | sdev->dma_dev.device_config = sprd_dma_slave_config; | |
9b3b8171 BW |
1124 | sdev->dma_dev.device_pause = sprd_dma_pause; |
1125 | sdev->dma_dev.device_resume = sprd_dma_resume; | |
1126 | sdev->dma_dev.device_terminate_all = sprd_dma_terminate_all; | |
1127 | ||
1128 | for (i = 0; i < chn_count; i++) { | |
1129 | dma_chn = &sdev->channels[i]; | |
1130 | dma_chn->chn_num = i; | |
1131 | dma_chn->cur_desc = NULL; | |
1132 | /* get each channel's registers base address. */ | |
1133 | dma_chn->chn_base = sdev->glb_base + SPRD_DMA_CHN_REG_OFFSET + | |
1134 | SPRD_DMA_CHN_REG_LENGTH * i; | |
1135 | ||
1136 | dma_chn->vc.desc_free = sprd_dma_free_desc; | |
1137 | vchan_init(&dma_chn->vc, &sdev->dma_dev); | |
1138 | } | |
1139 | ||
1140 | platform_set_drvdata(pdev, sdev); | |
1141 | ret = sprd_dma_enable(sdev); | |
1142 | if (ret) | |
1143 | return ret; | |
1144 | ||
1145 | pm_runtime_set_active(&pdev->dev); | |
1146 | pm_runtime_enable(&pdev->dev); | |
1147 | ||
1148 | ret = pm_runtime_get_sync(&pdev->dev); | |
1149 | if (ret < 0) | |
1150 | goto err_rpm; | |
1151 | ||
1152 | ret = dma_async_device_register(&sdev->dma_dev); | |
1153 | if (ret < 0) { | |
1154 | dev_err(&pdev->dev, "register dma device failed:%d\n", ret); | |
1155 | goto err_register; | |
1156 | } | |
1157 | ||
1158 | sprd_dma_info.dma_cap = sdev->dma_dev.cap_mask; | |
1159 | ret = of_dma_controller_register(np, of_dma_simple_xlate, | |
1160 | &sprd_dma_info); | |
1161 | if (ret) | |
1162 | goto err_of_register; | |
1163 | ||
1164 | pm_runtime_put(&pdev->dev); | |
1165 | return 0; | |
1166 | ||
1167 | err_of_register: | |
1168 | dma_async_device_unregister(&sdev->dma_dev); | |
1169 | err_register: | |
1170 | pm_runtime_put_noidle(&pdev->dev); | |
1171 | pm_runtime_disable(&pdev->dev); | |
1172 | err_rpm: | |
1173 | sprd_dma_disable(sdev); | |
1174 | return ret; | |
1175 | } | |
1176 | ||
1177 | static int sprd_dma_remove(struct platform_device *pdev) | |
1178 | { | |
1179 | struct sprd_dma_dev *sdev = platform_get_drvdata(pdev); | |
1180 | struct sprd_dma_chn *c, *cn; | |
1181 | int ret; | |
1182 | ||
1183 | ret = pm_runtime_get_sync(&pdev->dev); | |
1184 | if (ret < 0) | |
1185 | return ret; | |
1186 | ||
1187 | /* explicitly free the irq */ | |
1188 | if (sdev->irq > 0) | |
1189 | devm_free_irq(&pdev->dev, sdev->irq, sdev); | |
1190 | ||
1191 | list_for_each_entry_safe(c, cn, &sdev->dma_dev.channels, | |
1192 | vc.chan.device_node) { | |
1193 | list_del(&c->vc.chan.device_node); | |
1194 | tasklet_kill(&c->vc.task); | |
1195 | } | |
1196 | ||
1197 | of_dma_controller_free(pdev->dev.of_node); | |
1198 | dma_async_device_unregister(&sdev->dma_dev); | |
1199 | sprd_dma_disable(sdev); | |
1200 | ||
1201 | pm_runtime_put_noidle(&pdev->dev); | |
1202 | pm_runtime_disable(&pdev->dev); | |
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | static const struct of_device_id sprd_dma_match[] = { | |
1207 | { .compatible = "sprd,sc9860-dma", }, | |
1208 | {}, | |
1209 | }; | |
1210 | ||
1211 | static int __maybe_unused sprd_dma_runtime_suspend(struct device *dev) | |
1212 | { | |
1213 | struct sprd_dma_dev *sdev = dev_get_drvdata(dev); | |
1214 | ||
1215 | sprd_dma_disable(sdev); | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | static int __maybe_unused sprd_dma_runtime_resume(struct device *dev) | |
1220 | { | |
1221 | struct sprd_dma_dev *sdev = dev_get_drvdata(dev); | |
1222 | int ret; | |
1223 | ||
1224 | ret = sprd_dma_enable(sdev); | |
1225 | if (ret) | |
1226 | dev_err(sdev->dma_dev.dev, "enable dma failed\n"); | |
1227 | ||
1228 | return ret; | |
1229 | } | |
1230 | ||
1231 | static const struct dev_pm_ops sprd_dma_pm_ops = { | |
1232 | SET_RUNTIME_PM_OPS(sprd_dma_runtime_suspend, | |
1233 | sprd_dma_runtime_resume, | |
1234 | NULL) | |
1235 | }; | |
1236 | ||
1237 | static struct platform_driver sprd_dma_driver = { | |
1238 | .probe = sprd_dma_probe, | |
1239 | .remove = sprd_dma_remove, | |
1240 | .driver = { | |
1241 | .name = "sprd-dma", | |
1242 | .of_match_table = sprd_dma_match, | |
1243 | .pm = &sprd_dma_pm_ops, | |
1244 | }, | |
1245 | }; | |
1246 | module_platform_driver(sprd_dma_driver); | |
1247 | ||
1248 | MODULE_LICENSE("GPL v2"); | |
1249 | MODULE_DESCRIPTION("DMA driver for Spreadtrum"); | |
1250 | MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>"); | |
53197123 | 1251 | MODULE_AUTHOR("Eric Long <eric.long@spreadtrum.com>"); |
9b3b8171 | 1252 | MODULE_ALIAS("platform:sprd-dma"); |