Commit | Line | Data |
---|---|---|
0c42bd0e YW |
1 | /* |
2 | * Topcliff PCH DMA controller driver | |
3 | * Copyright (c) 2010 Intel Corporation | |
e79e72be | 4 | * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd. |
0c42bd0e YW |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
0c42bd0e YW |
14 | */ |
15 | ||
16 | #include <linux/dmaengine.h> | |
17 | #include <linux/dma-mapping.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/pci.h> | |
a15783c3 | 20 | #include <linux/slab.h> |
0c42bd0e YW |
21 | #include <linux/interrupt.h> |
22 | #include <linux/module.h> | |
23 | #include <linux/pch_dma.h> | |
24 | ||
d2ebfb33 RKAL |
25 | #include "dmaengine.h" |
26 | ||
0c42bd0e YW |
27 | #define DRV_NAME "pch-dma" |
28 | ||
29 | #define DMA_CTL0_DISABLE 0x0 | |
30 | #define DMA_CTL0_SG 0x1 | |
31 | #define DMA_CTL0_ONESHOT 0x2 | |
32 | #define DMA_CTL0_MODE_MASK_BITS 0x3 | |
33 | #define DMA_CTL0_DIR_SHIFT_BITS 2 | |
34 | #define DMA_CTL0_BITS_PER_CH 4 | |
35 | ||
36 | #define DMA_CTL2_START_SHIFT_BITS 8 | |
37 | #define DMA_CTL2_IRQ_ENABLE_MASK ((1UL << DMA_CTL2_START_SHIFT_BITS) - 1) | |
38 | ||
39 | #define DMA_STATUS_IDLE 0x0 | |
40 | #define DMA_STATUS_DESC_READ 0x1 | |
41 | #define DMA_STATUS_WAIT 0x2 | |
42 | #define DMA_STATUS_ACCESS 0x3 | |
43 | #define DMA_STATUS_BITS_PER_CH 2 | |
44 | #define DMA_STATUS_MASK_BITS 0x3 | |
45 | #define DMA_STATUS_SHIFT_BITS 16 | |
46 | #define DMA_STATUS_IRQ(x) (0x1 << (x)) | |
c3d4913c TM |
47 | #define DMA_STATUS0_ERR(x) (0x1 << ((x) + 8)) |
48 | #define DMA_STATUS2_ERR(x) (0x1 << (x)) | |
0c42bd0e YW |
49 | |
50 | #define DMA_DESC_WIDTH_SHIFT_BITS 12 | |
51 | #define DMA_DESC_WIDTH_1_BYTE (0x3 << DMA_DESC_WIDTH_SHIFT_BITS) | |
52 | #define DMA_DESC_WIDTH_2_BYTES (0x2 << DMA_DESC_WIDTH_SHIFT_BITS) | |
53 | #define DMA_DESC_WIDTH_4_BYTES (0x0 << DMA_DESC_WIDTH_SHIFT_BITS) | |
54 | #define DMA_DESC_MAX_COUNT_1_BYTE 0x3FF | |
55 | #define DMA_DESC_MAX_COUNT_2_BYTES 0x3FF | |
56 | #define DMA_DESC_MAX_COUNT_4_BYTES 0x7FF | |
57 | #define DMA_DESC_END_WITHOUT_IRQ 0x0 | |
58 | #define DMA_DESC_END_WITH_IRQ 0x1 | |
59 | #define DMA_DESC_FOLLOW_WITHOUT_IRQ 0x2 | |
60 | #define DMA_DESC_FOLLOW_WITH_IRQ 0x3 | |
61 | ||
c43f1508 | 62 | #define MAX_CHAN_NR 12 |
0c42bd0e | 63 | |
0b052f4a TM |
64 | #define DMA_MASK_CTL0_MODE 0x33333333 |
65 | #define DMA_MASK_CTL2_MODE 0x00003333 | |
66 | ||
0c42bd0e YW |
67 | static unsigned int init_nr_desc_per_channel = 64; |
68 | module_param(init_nr_desc_per_channel, uint, 0644); | |
69 | MODULE_PARM_DESC(init_nr_desc_per_channel, | |
70 | "initial descriptors per channel (default: 64)"); | |
71 | ||
72 | struct pch_dma_desc_regs { | |
73 | u32 dev_addr; | |
74 | u32 mem_addr; | |
75 | u32 size; | |
76 | u32 next; | |
77 | }; | |
78 | ||
79 | struct pch_dma_regs { | |
80 | u32 dma_ctl0; | |
81 | u32 dma_ctl1; | |
82 | u32 dma_ctl2; | |
194f5f27 | 83 | u32 dma_ctl3; |
0c42bd0e YW |
84 | u32 dma_sts0; |
85 | u32 dma_sts1; | |
194f5f27 | 86 | u32 dma_sts2; |
0c42bd0e | 87 | u32 reserved3; |
26d890f0 | 88 | struct pch_dma_desc_regs desc[MAX_CHAN_NR]; |
0c42bd0e YW |
89 | }; |
90 | ||
91 | struct pch_dma_desc { | |
92 | struct pch_dma_desc_regs regs; | |
93 | struct dma_async_tx_descriptor txd; | |
94 | struct list_head desc_node; | |
95 | struct list_head tx_list; | |
96 | }; | |
97 | ||
98 | struct pch_dma_chan { | |
99 | struct dma_chan chan; | |
100 | void __iomem *membase; | |
db8196df | 101 | enum dma_transfer_direction dir; |
0c42bd0e YW |
102 | struct tasklet_struct tasklet; |
103 | unsigned long err_status; | |
104 | ||
105 | spinlock_t lock; | |
106 | ||
0c42bd0e YW |
107 | struct list_head active_list; |
108 | struct list_head queue; | |
109 | struct list_head free_list; | |
110 | unsigned int descs_allocated; | |
111 | }; | |
112 | ||
113 | #define PDC_DEV_ADDR 0x00 | |
114 | #define PDC_MEM_ADDR 0x04 | |
115 | #define PDC_SIZE 0x08 | |
116 | #define PDC_NEXT 0x0C | |
117 | ||
118 | #define channel_readl(pdc, name) \ | |
119 | readl((pdc)->membase + PDC_##name) | |
120 | #define channel_writel(pdc, name, val) \ | |
121 | writel((val), (pdc)->membase + PDC_##name) | |
122 | ||
123 | struct pch_dma { | |
124 | struct dma_device dma; | |
125 | void __iomem *membase; | |
126 | struct pci_pool *pool; | |
127 | struct pch_dma_regs regs; | |
128 | struct pch_dma_desc_regs ch_regs[MAX_CHAN_NR]; | |
26d890f0 | 129 | struct pch_dma_chan channels[MAX_CHAN_NR]; |
0c42bd0e YW |
130 | }; |
131 | ||
132 | #define PCH_DMA_CTL0 0x00 | |
133 | #define PCH_DMA_CTL1 0x04 | |
134 | #define PCH_DMA_CTL2 0x08 | |
194f5f27 | 135 | #define PCH_DMA_CTL3 0x0C |
0c42bd0e YW |
136 | #define PCH_DMA_STS0 0x10 |
137 | #define PCH_DMA_STS1 0x14 | |
c3d4913c | 138 | #define PCH_DMA_STS2 0x18 |
0c42bd0e YW |
139 | |
140 | #define dma_readl(pd, name) \ | |
61cd2203 | 141 | readl((pd)->membase + PCH_DMA_##name) |
0c42bd0e | 142 | #define dma_writel(pd, name, val) \ |
61cd2203 | 143 | writel((val), (pd)->membase + PCH_DMA_##name) |
0c42bd0e | 144 | |
08645fdc TM |
145 | static inline |
146 | struct pch_dma_desc *to_pd_desc(struct dma_async_tx_descriptor *txd) | |
0c42bd0e YW |
147 | { |
148 | return container_of(txd, struct pch_dma_desc, txd); | |
149 | } | |
150 | ||
151 | static inline struct pch_dma_chan *to_pd_chan(struct dma_chan *chan) | |
152 | { | |
153 | return container_of(chan, struct pch_dma_chan, chan); | |
154 | } | |
155 | ||
156 | static inline struct pch_dma *to_pd(struct dma_device *ddev) | |
157 | { | |
158 | return container_of(ddev, struct pch_dma, dma); | |
159 | } | |
160 | ||
161 | static inline struct device *chan2dev(struct dma_chan *chan) | |
162 | { | |
163 | return &chan->dev->device; | |
164 | } | |
165 | ||
166 | static inline struct device *chan2parent(struct dma_chan *chan) | |
167 | { | |
168 | return chan->dev->device.parent; | |
169 | } | |
170 | ||
08645fdc TM |
171 | static inline |
172 | struct pch_dma_desc *pdc_first_active(struct pch_dma_chan *pd_chan) | |
0c42bd0e YW |
173 | { |
174 | return list_first_entry(&pd_chan->active_list, | |
175 | struct pch_dma_desc, desc_node); | |
176 | } | |
177 | ||
08645fdc TM |
178 | static inline |
179 | struct pch_dma_desc *pdc_first_queued(struct pch_dma_chan *pd_chan) | |
0c42bd0e YW |
180 | { |
181 | return list_first_entry(&pd_chan->queue, | |
182 | struct pch_dma_desc, desc_node); | |
183 | } | |
184 | ||
185 | static void pdc_enable_irq(struct dma_chan *chan, int enable) | |
186 | { | |
187 | struct pch_dma *pd = to_pd(chan->device); | |
188 | u32 val; | |
c3d4913c TM |
189 | int pos; |
190 | ||
191 | if (chan->chan_id < 8) | |
192 | pos = chan->chan_id; | |
193 | else | |
194 | pos = chan->chan_id + 8; | |
0c42bd0e YW |
195 | |
196 | val = dma_readl(pd, CTL2); | |
197 | ||
198 | if (enable) | |
c3d4913c | 199 | val |= 0x1 << pos; |
0c42bd0e | 200 | else |
c3d4913c | 201 | val &= ~(0x1 << pos); |
0c42bd0e YW |
202 | |
203 | dma_writel(pd, CTL2, val); | |
204 | ||
205 | dev_dbg(chan2dev(chan), "pdc_enable_irq: chan %d -> %x\n", | |
206 | chan->chan_id, val); | |
207 | } | |
208 | ||
209 | static void pdc_set_dir(struct dma_chan *chan) | |
210 | { | |
211 | struct pch_dma_chan *pd_chan = to_pd_chan(chan); | |
212 | struct pch_dma *pd = to_pd(chan->device); | |
213 | u32 val; | |
0b052f4a TM |
214 | u32 mask_mode; |
215 | u32 mask_ctl; | |
0c42bd0e | 216 | |
194f5f27 TM |
217 | if (chan->chan_id < 8) { |
218 | val = dma_readl(pd, CTL0); | |
0c42bd0e | 219 | |
0b052f4a TM |
220 | mask_mode = DMA_CTL0_MODE_MASK_BITS << |
221 | (DMA_CTL0_BITS_PER_CH * chan->chan_id); | |
222 | mask_ctl = DMA_MASK_CTL0_MODE & ~(DMA_CTL0_MODE_MASK_BITS << | |
223 | (DMA_CTL0_BITS_PER_CH * chan->chan_id)); | |
224 | val &= mask_mode; | |
db8196df | 225 | if (pd_chan->dir == DMA_MEM_TO_DEV) |
194f5f27 TM |
226 | val |= 0x1 << (DMA_CTL0_BITS_PER_CH * chan->chan_id + |
227 | DMA_CTL0_DIR_SHIFT_BITS); | |
228 | else | |
229 | val &= ~(0x1 << (DMA_CTL0_BITS_PER_CH * chan->chan_id + | |
230 | DMA_CTL0_DIR_SHIFT_BITS)); | |
231 | ||
0b052f4a | 232 | val |= mask_ctl; |
194f5f27 TM |
233 | dma_writel(pd, CTL0, val); |
234 | } else { | |
235 | int ch = chan->chan_id - 8; /* ch8-->0 ch9-->1 ... ch11->3 */ | |
236 | val = dma_readl(pd, CTL3); | |
0c42bd0e | 237 | |
0b052f4a TM |
238 | mask_mode = DMA_CTL0_MODE_MASK_BITS << |
239 | (DMA_CTL0_BITS_PER_CH * ch); | |
240 | mask_ctl = DMA_MASK_CTL2_MODE & ~(DMA_CTL0_MODE_MASK_BITS << | |
241 | (DMA_CTL0_BITS_PER_CH * ch)); | |
242 | val &= mask_mode; | |
db8196df | 243 | if (pd_chan->dir == DMA_MEM_TO_DEV) |
194f5f27 TM |
244 | val |= 0x1 << (DMA_CTL0_BITS_PER_CH * ch + |
245 | DMA_CTL0_DIR_SHIFT_BITS); | |
246 | else | |
247 | val &= ~(0x1 << (DMA_CTL0_BITS_PER_CH * ch + | |
248 | DMA_CTL0_DIR_SHIFT_BITS)); | |
0b052f4a | 249 | val |= mask_ctl; |
194f5f27 TM |
250 | dma_writel(pd, CTL3, val); |
251 | } | |
0c42bd0e YW |
252 | |
253 | dev_dbg(chan2dev(chan), "pdc_set_dir: chan %d -> %x\n", | |
254 | chan->chan_id, val); | |
255 | } | |
256 | ||
257 | static void pdc_set_mode(struct dma_chan *chan, u32 mode) | |
258 | { | |
259 | struct pch_dma *pd = to_pd(chan->device); | |
260 | u32 val; | |
0b052f4a TM |
261 | u32 mask_ctl; |
262 | u32 mask_dir; | |
0c42bd0e | 263 | |
194f5f27 | 264 | if (chan->chan_id < 8) { |
0b052f4a TM |
265 | mask_ctl = DMA_MASK_CTL0_MODE & ~(DMA_CTL0_MODE_MASK_BITS << |
266 | (DMA_CTL0_BITS_PER_CH * chan->chan_id)); | |
267 | mask_dir = 1 << (DMA_CTL0_BITS_PER_CH * chan->chan_id +\ | |
268 | DMA_CTL0_DIR_SHIFT_BITS); | |
194f5f27 | 269 | val = dma_readl(pd, CTL0); |
0b052f4a | 270 | val &= mask_dir; |
194f5f27 | 271 | val |= mode << (DMA_CTL0_BITS_PER_CH * chan->chan_id); |
0b052f4a | 272 | val |= mask_ctl; |
194f5f27 TM |
273 | dma_writel(pd, CTL0, val); |
274 | } else { | |
275 | int ch = chan->chan_id - 8; /* ch8-->0 ch9-->1 ... ch11->3 */ | |
0b052f4a TM |
276 | mask_ctl = DMA_MASK_CTL2_MODE & ~(DMA_CTL0_MODE_MASK_BITS << |
277 | (DMA_CTL0_BITS_PER_CH * ch)); | |
278 | mask_dir = 1 << (DMA_CTL0_BITS_PER_CH * ch +\ | |
279 | DMA_CTL0_DIR_SHIFT_BITS); | |
194f5f27 | 280 | val = dma_readl(pd, CTL3); |
0b052f4a | 281 | val &= mask_dir; |
194f5f27 | 282 | val |= mode << (DMA_CTL0_BITS_PER_CH * ch); |
0b052f4a | 283 | val |= mask_ctl; |
194f5f27 | 284 | dma_writel(pd, CTL3, val); |
194f5f27 | 285 | } |
0c42bd0e YW |
286 | |
287 | dev_dbg(chan2dev(chan), "pdc_set_mode: chan %d -> %x\n", | |
288 | chan->chan_id, val); | |
289 | } | |
290 | ||
c3d4913c | 291 | static u32 pdc_get_status0(struct pch_dma_chan *pd_chan) |
0c42bd0e YW |
292 | { |
293 | struct pch_dma *pd = to_pd(pd_chan->chan.device); | |
294 | u32 val; | |
295 | ||
296 | val = dma_readl(pd, STS0); | |
297 | return DMA_STATUS_MASK_BITS & (val >> (DMA_STATUS_SHIFT_BITS + | |
298 | DMA_STATUS_BITS_PER_CH * pd_chan->chan.chan_id)); | |
299 | } | |
300 | ||
c3d4913c TM |
301 | static u32 pdc_get_status2(struct pch_dma_chan *pd_chan) |
302 | { | |
303 | struct pch_dma *pd = to_pd(pd_chan->chan.device); | |
304 | u32 val; | |
305 | ||
306 | val = dma_readl(pd, STS2); | |
307 | return DMA_STATUS_MASK_BITS & (val >> (DMA_STATUS_SHIFT_BITS + | |
308 | DMA_STATUS_BITS_PER_CH * (pd_chan->chan.chan_id - 8))); | |
309 | } | |
310 | ||
0c42bd0e YW |
311 | static bool pdc_is_idle(struct pch_dma_chan *pd_chan) |
312 | { | |
c3d4913c TM |
313 | u32 sts; |
314 | ||
315 | if (pd_chan->chan.chan_id < 8) | |
316 | sts = pdc_get_status0(pd_chan); | |
317 | else | |
318 | sts = pdc_get_status2(pd_chan); | |
319 | ||
320 | ||
321 | if (sts == DMA_STATUS_IDLE) | |
0c42bd0e YW |
322 | return true; |
323 | else | |
324 | return false; | |
325 | } | |
326 | ||
327 | static void pdc_dostart(struct pch_dma_chan *pd_chan, struct pch_dma_desc* desc) | |
328 | { | |
0c42bd0e YW |
329 | if (!pdc_is_idle(pd_chan)) { |
330 | dev_err(chan2dev(&pd_chan->chan), | |
331 | "BUG: Attempt to start non-idle channel\n"); | |
332 | return; | |
333 | } | |
334 | ||
0c42bd0e YW |
335 | dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> dev_addr: %x\n", |
336 | pd_chan->chan.chan_id, desc->regs.dev_addr); | |
337 | dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> mem_addr: %x\n", | |
338 | pd_chan->chan.chan_id, desc->regs.mem_addr); | |
339 | dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> size: %x\n", | |
340 | pd_chan->chan.chan_id, desc->regs.size); | |
341 | dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> next: %x\n", | |
342 | pd_chan->chan.chan_id, desc->regs.next); | |
343 | ||
943d8d8b TM |
344 | if (list_empty(&desc->tx_list)) { |
345 | channel_writel(pd_chan, DEV_ADDR, desc->regs.dev_addr); | |
346 | channel_writel(pd_chan, MEM_ADDR, desc->regs.mem_addr); | |
347 | channel_writel(pd_chan, SIZE, desc->regs.size); | |
348 | channel_writel(pd_chan, NEXT, desc->regs.next); | |
0c42bd0e | 349 | pdc_set_mode(&pd_chan->chan, DMA_CTL0_ONESHOT); |
943d8d8b TM |
350 | } else { |
351 | channel_writel(pd_chan, NEXT, desc->txd.phys); | |
0c42bd0e | 352 | pdc_set_mode(&pd_chan->chan, DMA_CTL0_SG); |
943d8d8b | 353 | } |
0c42bd0e YW |
354 | } |
355 | ||
356 | static void pdc_chain_complete(struct pch_dma_chan *pd_chan, | |
357 | struct pch_dma_desc *desc) | |
358 | { | |
359 | struct dma_async_tx_descriptor *txd = &desc->txd; | |
360 | dma_async_tx_callback callback = txd->callback; | |
361 | void *param = txd->callback_param; | |
362 | ||
363 | list_splice_init(&desc->tx_list, &pd_chan->free_list); | |
364 | list_move(&desc->desc_node, &pd_chan->free_list); | |
365 | ||
366 | if (callback) | |
367 | callback(param); | |
368 | } | |
369 | ||
370 | static void pdc_complete_all(struct pch_dma_chan *pd_chan) | |
371 | { | |
372 | struct pch_dma_desc *desc, *_d; | |
373 | LIST_HEAD(list); | |
374 | ||
375 | BUG_ON(!pdc_is_idle(pd_chan)); | |
376 | ||
377 | if (!list_empty(&pd_chan->queue)) | |
378 | pdc_dostart(pd_chan, pdc_first_queued(pd_chan)); | |
379 | ||
380 | list_splice_init(&pd_chan->active_list, &list); | |
381 | list_splice_init(&pd_chan->queue, &pd_chan->active_list); | |
382 | ||
383 | list_for_each_entry_safe(desc, _d, &list, desc_node) | |
384 | pdc_chain_complete(pd_chan, desc); | |
385 | } | |
386 | ||
387 | static void pdc_handle_error(struct pch_dma_chan *pd_chan) | |
388 | { | |
389 | struct pch_dma_desc *bad_desc; | |
390 | ||
391 | bad_desc = pdc_first_active(pd_chan); | |
392 | list_del(&bad_desc->desc_node); | |
393 | ||
394 | list_splice_init(&pd_chan->queue, pd_chan->active_list.prev); | |
395 | ||
396 | if (!list_empty(&pd_chan->active_list)) | |
397 | pdc_dostart(pd_chan, pdc_first_active(pd_chan)); | |
398 | ||
399 | dev_crit(chan2dev(&pd_chan->chan), "Bad descriptor submitted\n"); | |
400 | dev_crit(chan2dev(&pd_chan->chan), "descriptor cookie: %d\n", | |
401 | bad_desc->txd.cookie); | |
402 | ||
403 | pdc_chain_complete(pd_chan, bad_desc); | |
404 | } | |
405 | ||
406 | static void pdc_advance_work(struct pch_dma_chan *pd_chan) | |
407 | { | |
408 | if (list_empty(&pd_chan->active_list) || | |
409 | list_is_singular(&pd_chan->active_list)) { | |
410 | pdc_complete_all(pd_chan); | |
411 | } else { | |
412 | pdc_chain_complete(pd_chan, pdc_first_active(pd_chan)); | |
413 | pdc_dostart(pd_chan, pdc_first_active(pd_chan)); | |
414 | } | |
415 | } | |
416 | ||
0c42bd0e YW |
417 | static dma_cookie_t pd_tx_submit(struct dma_async_tx_descriptor *txd) |
418 | { | |
419 | struct pch_dma_desc *desc = to_pd_desc(txd); | |
420 | struct pch_dma_chan *pd_chan = to_pd_chan(txd->chan); | |
421 | dma_cookie_t cookie; | |
422 | ||
c5a9f9d0 | 423 | spin_lock(&pd_chan->lock); |
884485e1 | 424 | cookie = dma_cookie_assign(txd); |
0c42bd0e YW |
425 | |
426 | if (list_empty(&pd_chan->active_list)) { | |
427 | list_add_tail(&desc->desc_node, &pd_chan->active_list); | |
428 | pdc_dostart(pd_chan, desc); | |
429 | } else { | |
430 | list_add_tail(&desc->desc_node, &pd_chan->queue); | |
431 | } | |
432 | ||
c5a9f9d0 | 433 | spin_unlock(&pd_chan->lock); |
0c42bd0e YW |
434 | return 0; |
435 | } | |
436 | ||
437 | static struct pch_dma_desc *pdc_alloc_desc(struct dma_chan *chan, gfp_t flags) | |
438 | { | |
439 | struct pch_dma_desc *desc = NULL; | |
440 | struct pch_dma *pd = to_pd(chan->device); | |
441 | dma_addr_t addr; | |
442 | ||
c5a9f9d0 | 443 | desc = pci_pool_alloc(pd->pool, flags, &addr); |
0c42bd0e YW |
444 | if (desc) { |
445 | memset(desc, 0, sizeof(struct pch_dma_desc)); | |
446 | INIT_LIST_HEAD(&desc->tx_list); | |
447 | dma_async_tx_descriptor_init(&desc->txd, chan); | |
448 | desc->txd.tx_submit = pd_tx_submit; | |
449 | desc->txd.flags = DMA_CTRL_ACK; | |
450 | desc->txd.phys = addr; | |
451 | } | |
452 | ||
453 | return desc; | |
454 | } | |
455 | ||
456 | static struct pch_dma_desc *pdc_desc_get(struct pch_dma_chan *pd_chan) | |
457 | { | |
458 | struct pch_dma_desc *desc, *_d; | |
459 | struct pch_dma_desc *ret = NULL; | |
364de778 | 460 | int i = 0; |
0c42bd0e | 461 | |
c5a9f9d0 | 462 | spin_lock(&pd_chan->lock); |
0c42bd0e YW |
463 | list_for_each_entry_safe(desc, _d, &pd_chan->free_list, desc_node) { |
464 | i++; | |
465 | if (async_tx_test_ack(&desc->txd)) { | |
466 | list_del(&desc->desc_node); | |
467 | ret = desc; | |
468 | break; | |
469 | } | |
470 | dev_dbg(chan2dev(&pd_chan->chan), "desc %p not ACKed\n", desc); | |
471 | } | |
c5a9f9d0 | 472 | spin_unlock(&pd_chan->lock); |
0c42bd0e YW |
473 | dev_dbg(chan2dev(&pd_chan->chan), "scanned %d descriptors\n", i); |
474 | ||
475 | if (!ret) { | |
5c1ef591 | 476 | ret = pdc_alloc_desc(&pd_chan->chan, GFP_ATOMIC); |
0c42bd0e | 477 | if (ret) { |
c5a9f9d0 | 478 | spin_lock(&pd_chan->lock); |
0c42bd0e | 479 | pd_chan->descs_allocated++; |
c5a9f9d0 | 480 | spin_unlock(&pd_chan->lock); |
0c42bd0e YW |
481 | } else { |
482 | dev_err(chan2dev(&pd_chan->chan), | |
483 | "failed to alloc desc\n"); | |
484 | } | |
485 | } | |
486 | ||
487 | return ret; | |
488 | } | |
489 | ||
490 | static void pdc_desc_put(struct pch_dma_chan *pd_chan, | |
491 | struct pch_dma_desc *desc) | |
492 | { | |
493 | if (desc) { | |
c5a9f9d0 | 494 | spin_lock(&pd_chan->lock); |
0c42bd0e YW |
495 | list_splice_init(&desc->tx_list, &pd_chan->free_list); |
496 | list_add(&desc->desc_node, &pd_chan->free_list); | |
c5a9f9d0 | 497 | spin_unlock(&pd_chan->lock); |
0c42bd0e YW |
498 | } |
499 | } | |
500 | ||
501 | static int pd_alloc_chan_resources(struct dma_chan *chan) | |
502 | { | |
503 | struct pch_dma_chan *pd_chan = to_pd_chan(chan); | |
504 | struct pch_dma_desc *desc; | |
505 | LIST_HEAD(tmp_list); | |
506 | int i; | |
507 | ||
508 | if (!pdc_is_idle(pd_chan)) { | |
509 | dev_dbg(chan2dev(chan), "DMA channel not idle ?\n"); | |
510 | return -EIO; | |
511 | } | |
512 | ||
513 | if (!list_empty(&pd_chan->free_list)) | |
514 | return pd_chan->descs_allocated; | |
515 | ||
516 | for (i = 0; i < init_nr_desc_per_channel; i++) { | |
517 | desc = pdc_alloc_desc(chan, GFP_KERNEL); | |
518 | ||
519 | if (!desc) { | |
520 | dev_warn(chan2dev(chan), | |
521 | "Only allocated %d initial descriptors\n", i); | |
522 | break; | |
523 | } | |
524 | ||
525 | list_add_tail(&desc->desc_node, &tmp_list); | |
526 | } | |
527 | ||
70f18915 | 528 | spin_lock_irq(&pd_chan->lock); |
0c42bd0e YW |
529 | list_splice(&tmp_list, &pd_chan->free_list); |
530 | pd_chan->descs_allocated = i; | |
d3ee98cd | 531 | dma_cookie_init(chan); |
70f18915 | 532 | spin_unlock_irq(&pd_chan->lock); |
0c42bd0e YW |
533 | |
534 | pdc_enable_irq(chan, 1); | |
0c42bd0e YW |
535 | |
536 | return pd_chan->descs_allocated; | |
537 | } | |
538 | ||
539 | static void pd_free_chan_resources(struct dma_chan *chan) | |
540 | { | |
541 | struct pch_dma_chan *pd_chan = to_pd_chan(chan); | |
542 | struct pch_dma *pd = to_pd(chan->device); | |
543 | struct pch_dma_desc *desc, *_d; | |
544 | LIST_HEAD(tmp_list); | |
545 | ||
546 | BUG_ON(!pdc_is_idle(pd_chan)); | |
547 | BUG_ON(!list_empty(&pd_chan->active_list)); | |
548 | BUG_ON(!list_empty(&pd_chan->queue)); | |
549 | ||
70f18915 | 550 | spin_lock_irq(&pd_chan->lock); |
0c42bd0e YW |
551 | list_splice_init(&pd_chan->free_list, &tmp_list); |
552 | pd_chan->descs_allocated = 0; | |
70f18915 | 553 | spin_unlock_irq(&pd_chan->lock); |
0c42bd0e YW |
554 | |
555 | list_for_each_entry_safe(desc, _d, &tmp_list, desc_node) | |
556 | pci_pool_free(pd->pool, desc, desc->txd.phys); | |
557 | ||
558 | pdc_enable_irq(chan, 0); | |
559 | } | |
560 | ||
561 | static enum dma_status pd_tx_status(struct dma_chan *chan, dma_cookie_t cookie, | |
562 | struct dma_tx_state *txstate) | |
563 | { | |
da0a908e | 564 | return dma_cookie_status(chan, cookie, txstate); |
0c42bd0e YW |
565 | } |
566 | ||
567 | static void pd_issue_pending(struct dma_chan *chan) | |
568 | { | |
569 | struct pch_dma_chan *pd_chan = to_pd_chan(chan); | |
570 | ||
571 | if (pdc_is_idle(pd_chan)) { | |
c5a9f9d0 | 572 | spin_lock(&pd_chan->lock); |
0c42bd0e | 573 | pdc_advance_work(pd_chan); |
c5a9f9d0 | 574 | spin_unlock(&pd_chan->lock); |
0c42bd0e YW |
575 | } |
576 | } | |
577 | ||
578 | static struct dma_async_tx_descriptor *pd_prep_slave_sg(struct dma_chan *chan, | |
579 | struct scatterlist *sgl, unsigned int sg_len, | |
185ecb5f AB |
580 | enum dma_transfer_direction direction, unsigned long flags, |
581 | void *context) | |
0c42bd0e YW |
582 | { |
583 | struct pch_dma_chan *pd_chan = to_pd_chan(chan); | |
584 | struct pch_dma_slave *pd_slave = chan->private; | |
585 | struct pch_dma_desc *first = NULL; | |
586 | struct pch_dma_desc *prev = NULL; | |
587 | struct pch_dma_desc *desc = NULL; | |
588 | struct scatterlist *sg; | |
589 | dma_addr_t reg; | |
590 | int i; | |
591 | ||
592 | if (unlikely(!sg_len)) { | |
593 | dev_info(chan2dev(chan), "prep_slave_sg: length is zero!\n"); | |
594 | return NULL; | |
595 | } | |
596 | ||
db8196df | 597 | if (direction == DMA_DEV_TO_MEM) |
0c42bd0e | 598 | reg = pd_slave->rx_reg; |
db8196df | 599 | else if (direction == DMA_MEM_TO_DEV) |
0c42bd0e YW |
600 | reg = pd_slave->tx_reg; |
601 | else | |
602 | return NULL; | |
603 | ||
c8fcba60 TM |
604 | pd_chan->dir = direction; |
605 | pdc_set_dir(chan); | |
606 | ||
0c42bd0e YW |
607 | for_each_sg(sgl, sg, sg_len, i) { |
608 | desc = pdc_desc_get(pd_chan); | |
609 | ||
610 | if (!desc) | |
611 | goto err_desc_get; | |
612 | ||
613 | desc->regs.dev_addr = reg; | |
cbb796cc | 614 | desc->regs.mem_addr = sg_dma_address(sg); |
0c42bd0e YW |
615 | desc->regs.size = sg_dma_len(sg); |
616 | desc->regs.next = DMA_DESC_FOLLOW_WITHOUT_IRQ; | |
617 | ||
618 | switch (pd_slave->width) { | |
619 | case PCH_DMA_WIDTH_1_BYTE: | |
620 | if (desc->regs.size > DMA_DESC_MAX_COUNT_1_BYTE) | |
621 | goto err_desc_get; | |
622 | desc->regs.size |= DMA_DESC_WIDTH_1_BYTE; | |
623 | break; | |
624 | case PCH_DMA_WIDTH_2_BYTES: | |
625 | if (desc->regs.size > DMA_DESC_MAX_COUNT_2_BYTES) | |
626 | goto err_desc_get; | |
627 | desc->regs.size |= DMA_DESC_WIDTH_2_BYTES; | |
628 | break; | |
629 | case PCH_DMA_WIDTH_4_BYTES: | |
630 | if (desc->regs.size > DMA_DESC_MAX_COUNT_4_BYTES) | |
631 | goto err_desc_get; | |
632 | desc->regs.size |= DMA_DESC_WIDTH_4_BYTES; | |
633 | break; | |
634 | default: | |
635 | goto err_desc_get; | |
636 | } | |
637 | ||
0c42bd0e YW |
638 | if (!first) { |
639 | first = desc; | |
640 | } else { | |
641 | prev->regs.next |= desc->txd.phys; | |
642 | list_add_tail(&desc->desc_node, &first->tx_list); | |
643 | } | |
644 | ||
645 | prev = desc; | |
646 | } | |
647 | ||
648 | if (flags & DMA_PREP_INTERRUPT) | |
649 | desc->regs.next = DMA_DESC_END_WITH_IRQ; | |
650 | else | |
651 | desc->regs.next = DMA_DESC_END_WITHOUT_IRQ; | |
652 | ||
653 | first->txd.cookie = -EBUSY; | |
654 | desc->txd.flags = flags; | |
655 | ||
656 | return &first->txd; | |
657 | ||
658 | err_desc_get: | |
659 | dev_err(chan2dev(chan), "failed to get desc or wrong parameters\n"); | |
660 | pdc_desc_put(pd_chan, first); | |
661 | return NULL; | |
662 | } | |
663 | ||
c91781b4 | 664 | static int pd_device_terminate_all(struct dma_chan *chan) |
0c42bd0e YW |
665 | { |
666 | struct pch_dma_chan *pd_chan = to_pd_chan(chan); | |
667 | struct pch_dma_desc *desc, *_d; | |
668 | LIST_HEAD(list); | |
669 | ||
70f18915 | 670 | spin_lock_irq(&pd_chan->lock); |
0c42bd0e YW |
671 | |
672 | pdc_set_mode(&pd_chan->chan, DMA_CTL0_DISABLE); | |
673 | ||
674 | list_splice_init(&pd_chan->active_list, &list); | |
675 | list_splice_init(&pd_chan->queue, &list); | |
676 | ||
677 | list_for_each_entry_safe(desc, _d, &list, desc_node) | |
678 | pdc_chain_complete(pd_chan, desc); | |
679 | ||
70f18915 | 680 | spin_unlock_irq(&pd_chan->lock); |
0c42bd0e | 681 | |
0c42bd0e YW |
682 | return 0; |
683 | } | |
684 | ||
685 | static void pdc_tasklet(unsigned long data) | |
686 | { | |
687 | struct pch_dma_chan *pd_chan = (struct pch_dma_chan *)data; | |
c5a9f9d0 | 688 | unsigned long flags; |
0c42bd0e YW |
689 | |
690 | if (!pdc_is_idle(pd_chan)) { | |
691 | dev_err(chan2dev(&pd_chan->chan), | |
692 | "BUG: handle non-idle channel in tasklet\n"); | |
693 | return; | |
694 | } | |
695 | ||
c5a9f9d0 | 696 | spin_lock_irqsave(&pd_chan->lock, flags); |
0c42bd0e YW |
697 | if (test_and_clear_bit(0, &pd_chan->err_status)) |
698 | pdc_handle_error(pd_chan); | |
699 | else | |
700 | pdc_advance_work(pd_chan); | |
c5a9f9d0 | 701 | spin_unlock_irqrestore(&pd_chan->lock, flags); |
0c42bd0e YW |
702 | } |
703 | ||
704 | static irqreturn_t pd_irq(int irq, void *devid) | |
705 | { | |
706 | struct pch_dma *pd = (struct pch_dma *)devid; | |
707 | struct pch_dma_chan *pd_chan; | |
708 | u32 sts0; | |
c3d4913c | 709 | u32 sts2; |
0c42bd0e | 710 | int i; |
c3d4913c TM |
711 | int ret0 = IRQ_NONE; |
712 | int ret2 = IRQ_NONE; | |
0c42bd0e YW |
713 | |
714 | sts0 = dma_readl(pd, STS0); | |
c3d4913c | 715 | sts2 = dma_readl(pd, STS2); |
0c42bd0e YW |
716 | |
717 | dev_dbg(pd->dma.dev, "pd_irq sts0: %x\n", sts0); | |
718 | ||
719 | for (i = 0; i < pd->dma.chancnt; i++) { | |
720 | pd_chan = &pd->channels[i]; | |
721 | ||
c3d4913c TM |
722 | if (i < 8) { |
723 | if (sts0 & DMA_STATUS_IRQ(i)) { | |
724 | if (sts0 & DMA_STATUS0_ERR(i)) | |
725 | set_bit(0, &pd_chan->err_status); | |
0c42bd0e | 726 | |
c3d4913c TM |
727 | tasklet_schedule(&pd_chan->tasklet); |
728 | ret0 = IRQ_HANDLED; | |
729 | } | |
730 | } else { | |
731 | if (sts2 & DMA_STATUS_IRQ(i - 8)) { | |
732 | if (sts2 & DMA_STATUS2_ERR(i)) | |
733 | set_bit(0, &pd_chan->err_status); | |
0c42bd0e | 734 | |
c3d4913c TM |
735 | tasklet_schedule(&pd_chan->tasklet); |
736 | ret2 = IRQ_HANDLED; | |
737 | } | |
738 | } | |
0c42bd0e YW |
739 | } |
740 | ||
741 | /* clear interrupt bits in status register */ | |
c3d4913c TM |
742 | if (ret0) |
743 | dma_writel(pd, STS0, sts0); | |
744 | if (ret2) | |
745 | dma_writel(pd, STS2, sts2); | |
0c42bd0e | 746 | |
c3d4913c | 747 | return ret0 | ret2; |
0c42bd0e YW |
748 | } |
749 | ||
0b863b33 | 750 | #ifdef CONFIG_PM |
0c42bd0e YW |
751 | static void pch_dma_save_regs(struct pch_dma *pd) |
752 | { | |
753 | struct pch_dma_chan *pd_chan; | |
754 | struct dma_chan *chan, *_c; | |
755 | int i = 0; | |
756 | ||
757 | pd->regs.dma_ctl0 = dma_readl(pd, CTL0); | |
758 | pd->regs.dma_ctl1 = dma_readl(pd, CTL1); | |
759 | pd->regs.dma_ctl2 = dma_readl(pd, CTL2); | |
194f5f27 | 760 | pd->regs.dma_ctl3 = dma_readl(pd, CTL3); |
0c42bd0e YW |
761 | |
762 | list_for_each_entry_safe(chan, _c, &pd->dma.channels, device_node) { | |
763 | pd_chan = to_pd_chan(chan); | |
764 | ||
765 | pd->ch_regs[i].dev_addr = channel_readl(pd_chan, DEV_ADDR); | |
766 | pd->ch_regs[i].mem_addr = channel_readl(pd_chan, MEM_ADDR); | |
767 | pd->ch_regs[i].size = channel_readl(pd_chan, SIZE); | |
768 | pd->ch_regs[i].next = channel_readl(pd_chan, NEXT); | |
769 | ||
770 | i++; | |
771 | } | |
772 | } | |
773 | ||
774 | static void pch_dma_restore_regs(struct pch_dma *pd) | |
775 | { | |
776 | struct pch_dma_chan *pd_chan; | |
777 | struct dma_chan *chan, *_c; | |
778 | int i = 0; | |
779 | ||
780 | dma_writel(pd, CTL0, pd->regs.dma_ctl0); | |
781 | dma_writel(pd, CTL1, pd->regs.dma_ctl1); | |
782 | dma_writel(pd, CTL2, pd->regs.dma_ctl2); | |
194f5f27 | 783 | dma_writel(pd, CTL3, pd->regs.dma_ctl3); |
0c42bd0e YW |
784 | |
785 | list_for_each_entry_safe(chan, _c, &pd->dma.channels, device_node) { | |
786 | pd_chan = to_pd_chan(chan); | |
787 | ||
788 | channel_writel(pd_chan, DEV_ADDR, pd->ch_regs[i].dev_addr); | |
789 | channel_writel(pd_chan, MEM_ADDR, pd->ch_regs[i].mem_addr); | |
790 | channel_writel(pd_chan, SIZE, pd->ch_regs[i].size); | |
791 | channel_writel(pd_chan, NEXT, pd->ch_regs[i].next); | |
792 | ||
793 | i++; | |
794 | } | |
795 | } | |
796 | ||
797 | static int pch_dma_suspend(struct pci_dev *pdev, pm_message_t state) | |
798 | { | |
799 | struct pch_dma *pd = pci_get_drvdata(pdev); | |
800 | ||
801 | if (pd) | |
802 | pch_dma_save_regs(pd); | |
803 | ||
804 | pci_save_state(pdev); | |
805 | pci_disable_device(pdev); | |
806 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
807 | ||
808 | return 0; | |
809 | } | |
810 | ||
811 | static int pch_dma_resume(struct pci_dev *pdev) | |
812 | { | |
813 | struct pch_dma *pd = pci_get_drvdata(pdev); | |
814 | int err; | |
815 | ||
816 | pci_set_power_state(pdev, PCI_D0); | |
817 | pci_restore_state(pdev); | |
818 | ||
819 | err = pci_enable_device(pdev); | |
820 | if (err) { | |
821 | dev_dbg(&pdev->dev, "failed to enable device\n"); | |
822 | return err; | |
823 | } | |
824 | ||
825 | if (pd) | |
826 | pch_dma_restore_regs(pd); | |
827 | ||
828 | return 0; | |
829 | } | |
0b863b33 | 830 | #endif |
0c42bd0e | 831 | |
463a1f8b | 832 | static int pch_dma_probe(struct pci_dev *pdev, |
0c42bd0e YW |
833 | const struct pci_device_id *id) |
834 | { | |
835 | struct pch_dma *pd; | |
836 | struct pch_dma_regs *regs; | |
837 | unsigned int nr_channels; | |
838 | int err; | |
839 | int i; | |
840 | ||
841 | nr_channels = id->driver_data; | |
01631243 | 842 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); |
0c42bd0e YW |
843 | if (!pd) |
844 | return -ENOMEM; | |
845 | ||
846 | pci_set_drvdata(pdev, pd); | |
847 | ||
848 | err = pci_enable_device(pdev); | |
849 | if (err) { | |
850 | dev_err(&pdev->dev, "Cannot enable PCI device\n"); | |
851 | goto err_free_mem; | |
852 | } | |
853 | ||
854 | if (!(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) { | |
855 | dev_err(&pdev->dev, "Cannot find proper base address\n"); | |
27abb2ff | 856 | err = -ENODEV; |
0c42bd0e YW |
857 | goto err_disable_pdev; |
858 | } | |
859 | ||
860 | err = pci_request_regions(pdev, DRV_NAME); | |
861 | if (err) { | |
862 | dev_err(&pdev->dev, "Cannot obtain PCI resources\n"); | |
863 | goto err_disable_pdev; | |
864 | } | |
865 | ||
866 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); | |
867 | if (err) { | |
868 | dev_err(&pdev->dev, "Cannot set proper DMA config\n"); | |
869 | goto err_free_res; | |
870 | } | |
871 | ||
872 | regs = pd->membase = pci_iomap(pdev, 1, 0); | |
873 | if (!pd->membase) { | |
874 | dev_err(&pdev->dev, "Cannot map MMIO registers\n"); | |
875 | err = -ENOMEM; | |
876 | goto err_free_res; | |
877 | } | |
878 | ||
879 | pci_set_master(pdev); | |
880 | ||
881 | err = request_irq(pdev->irq, pd_irq, IRQF_SHARED, DRV_NAME, pd); | |
882 | if (err) { | |
883 | dev_err(&pdev->dev, "Failed to request IRQ\n"); | |
884 | goto err_iounmap; | |
885 | } | |
886 | ||
887 | pd->pool = pci_pool_create("pch_dma_desc_pool", pdev, | |
888 | sizeof(struct pch_dma_desc), 4, 0); | |
889 | if (!pd->pool) { | |
890 | dev_err(&pdev->dev, "Failed to alloc DMA descriptors\n"); | |
891 | err = -ENOMEM; | |
892 | goto err_free_irq; | |
893 | } | |
894 | ||
895 | pd->dma.dev = &pdev->dev; | |
0c42bd0e YW |
896 | |
897 | INIT_LIST_HEAD(&pd->dma.channels); | |
898 | ||
899 | for (i = 0; i < nr_channels; i++) { | |
900 | struct pch_dma_chan *pd_chan = &pd->channels[i]; | |
901 | ||
902 | pd_chan->chan.device = &pd->dma; | |
d3ee98cd | 903 | dma_cookie_init(&pd_chan->chan); |
0c42bd0e YW |
904 | |
905 | pd_chan->membase = ®s->desc[i]; | |
906 | ||
0c42bd0e YW |
907 | spin_lock_init(&pd_chan->lock); |
908 | ||
909 | INIT_LIST_HEAD(&pd_chan->active_list); | |
910 | INIT_LIST_HEAD(&pd_chan->queue); | |
911 | INIT_LIST_HEAD(&pd_chan->free_list); | |
912 | ||
913 | tasklet_init(&pd_chan->tasklet, pdc_tasklet, | |
914 | (unsigned long)pd_chan); | |
915 | list_add_tail(&pd_chan->chan.device_node, &pd->dma.channels); | |
916 | } | |
917 | ||
918 | dma_cap_zero(pd->dma.cap_mask); | |
919 | dma_cap_set(DMA_PRIVATE, pd->dma.cap_mask); | |
920 | dma_cap_set(DMA_SLAVE, pd->dma.cap_mask); | |
921 | ||
922 | pd->dma.device_alloc_chan_resources = pd_alloc_chan_resources; | |
923 | pd->dma.device_free_chan_resources = pd_free_chan_resources; | |
924 | pd->dma.device_tx_status = pd_tx_status; | |
925 | pd->dma.device_issue_pending = pd_issue_pending; | |
926 | pd->dma.device_prep_slave_sg = pd_prep_slave_sg; | |
c91781b4 | 927 | pd->dma.device_terminate_all = pd_device_terminate_all; |
0c42bd0e YW |
928 | |
929 | err = dma_async_device_register(&pd->dma); | |
930 | if (err) { | |
931 | dev_err(&pdev->dev, "Failed to register DMA device\n"); | |
932 | goto err_free_pool; | |
933 | } | |
934 | ||
935 | return 0; | |
936 | ||
937 | err_free_pool: | |
938 | pci_pool_destroy(pd->pool); | |
939 | err_free_irq: | |
940 | free_irq(pdev->irq, pd); | |
941 | err_iounmap: | |
942 | pci_iounmap(pdev, pd->membase); | |
943 | err_free_res: | |
944 | pci_release_regions(pdev); | |
945 | err_disable_pdev: | |
946 | pci_disable_device(pdev); | |
947 | err_free_mem: | |
12d7b7a2 | 948 | kfree(pd); |
0c42bd0e YW |
949 | return err; |
950 | } | |
951 | ||
4bf27b8b | 952 | static void pch_dma_remove(struct pci_dev *pdev) |
0c42bd0e YW |
953 | { |
954 | struct pch_dma *pd = pci_get_drvdata(pdev); | |
955 | struct pch_dma_chan *pd_chan; | |
956 | struct dma_chan *chan, *_c; | |
957 | ||
958 | if (pd) { | |
959 | dma_async_device_unregister(&pd->dma); | |
960 | ||
9068b032 VK |
961 | free_irq(pdev->irq, pd); |
962 | ||
0c42bd0e YW |
963 | list_for_each_entry_safe(chan, _c, &pd->dma.channels, |
964 | device_node) { | |
965 | pd_chan = to_pd_chan(chan); | |
966 | ||
0c42bd0e YW |
967 | tasklet_kill(&pd_chan->tasklet); |
968 | } | |
969 | ||
970 | pci_pool_destroy(pd->pool); | |
0c42bd0e YW |
971 | pci_iounmap(pdev, pd->membase); |
972 | pci_release_regions(pdev); | |
973 | pci_disable_device(pdev); | |
974 | kfree(pd); | |
975 | } | |
976 | } | |
977 | ||
978 | /* PCI Device ID of DMA device */ | |
2cdf2455 TM |
979 | #define PCI_VENDOR_ID_ROHM 0x10DB |
980 | #define PCI_DEVICE_ID_EG20T_PCH_DMA_8CH 0x8810 | |
981 | #define PCI_DEVICE_ID_EG20T_PCH_DMA_4CH 0x8815 | |
982 | #define PCI_DEVICE_ID_ML7213_DMA1_8CH 0x8026 | |
983 | #define PCI_DEVICE_ID_ML7213_DMA2_8CH 0x802B | |
984 | #define PCI_DEVICE_ID_ML7213_DMA3_4CH 0x8034 | |
194f5f27 | 985 | #define PCI_DEVICE_ID_ML7213_DMA4_12CH 0x8032 |
c0dfc04a TM |
986 | #define PCI_DEVICE_ID_ML7223_DMA1_4CH 0x800B |
987 | #define PCI_DEVICE_ID_ML7223_DMA2_4CH 0x800E | |
988 | #define PCI_DEVICE_ID_ML7223_DMA3_4CH 0x8017 | |
989 | #define PCI_DEVICE_ID_ML7223_DMA4_4CH 0x803B | |
ca7fe2db TM |
990 | #define PCI_DEVICE_ID_ML7831_DMA1_8CH 0x8810 |
991 | #define PCI_DEVICE_ID_ML7831_DMA2_4CH 0x8815 | |
0c42bd0e | 992 | |
345e3123 | 993 | static const struct pci_device_id pch_dma_id_table[] = { |
2cdf2455 TM |
994 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_EG20T_PCH_DMA_8CH), 8 }, |
995 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_EG20T_PCH_DMA_4CH), 4 }, | |
996 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_DMA1_8CH), 8}, /* UART Video */ | |
997 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_DMA2_8CH), 8}, /* PCMIF SPI */ | |
998 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_DMA3_4CH), 4}, /* FPGA */ | |
194f5f27 | 999 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_DMA4_12CH), 12}, /* I2S */ |
c0dfc04a TM |
1000 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_DMA1_4CH), 4}, /* UART */ |
1001 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_DMA2_4CH), 4}, /* Video SPI */ | |
1002 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_DMA3_4CH), 4}, /* Security */ | |
1003 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_DMA4_4CH), 4}, /* FPGA */ | |
ca7fe2db TM |
1004 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7831_DMA1_8CH), 8}, /* UART */ |
1005 | { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7831_DMA2_4CH), 4}, /* SPI */ | |
87acf5ad | 1006 | { 0, }, |
0c42bd0e YW |
1007 | }; |
1008 | ||
1009 | static struct pci_driver pch_dma_driver = { | |
1010 | .name = DRV_NAME, | |
1011 | .id_table = pch_dma_id_table, | |
1012 | .probe = pch_dma_probe, | |
a7d6e3ec | 1013 | .remove = pch_dma_remove, |
0c42bd0e YW |
1014 | #ifdef CONFIG_PM |
1015 | .suspend = pch_dma_suspend, | |
1016 | .resume = pch_dma_resume, | |
1017 | #endif | |
1018 | }; | |
1019 | ||
53b9989b | 1020 | module_pci_driver(pch_dma_driver); |
0c42bd0e | 1021 | |
ca7fe2db | 1022 | MODULE_DESCRIPTION("Intel EG20T PCH / LAPIS Semicon ML7213/ML7223/ML7831 IOH " |
2cdf2455 | 1023 | "DMA controller driver"); |
0c42bd0e YW |
1024 | MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>"); |
1025 | MODULE_LICENSE("GPL v2"); | |
58ddff20 | 1026 | MODULE_DEVICE_TABLE(pci, pch_dma_id_table); |