Commit | Line | Data |
---|---|---|
1ec1e82f SH |
1 | /* |
2 | * drivers/dma/imx-sdma.c | |
3 | * | |
4 | * This file contains a driver for the Freescale Smart DMA engine | |
5 | * | |
6 | * Copyright 2010 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de> | |
7 | * | |
8 | * Based on code from Freescale: | |
9 | * | |
10 | * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved. | |
11 | * | |
12 | * The code contained herein is licensed under the GNU General Public | |
13 | * License. You may obtain a copy of the GNU General Public License | |
14 | * Version 2 or later at the following locations: | |
15 | * | |
16 | * http://www.opensource.org/licenses/gpl-license.html | |
17 | * http://www.gnu.org/copyleft/gpl.html | |
18 | */ | |
19 | ||
20 | #include <linux/init.h> | |
f8de8f4c | 21 | #include <linux/module.h> |
1ec1e82f | 22 | #include <linux/types.h> |
0bbc1413 | 23 | #include <linux/bitops.h> |
1ec1e82f SH |
24 | #include <linux/mm.h> |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/clk.h> | |
2ccaef05 | 27 | #include <linux/delay.h> |
1ec1e82f SH |
28 | #include <linux/sched.h> |
29 | #include <linux/semaphore.h> | |
30 | #include <linux/spinlock.h> | |
31 | #include <linux/device.h> | |
32 | #include <linux/dma-mapping.h> | |
33 | #include <linux/firmware.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/platform_device.h> | |
36 | #include <linux/dmaengine.h> | |
580975d7 SG |
37 | #include <linux/of.h> |
38 | #include <linux/of_device.h> | |
9479e17c | 39 | #include <linux/of_dma.h> |
1ec1e82f SH |
40 | |
41 | #include <asm/irq.h> | |
82906b13 AB |
42 | #include <linux/platform_data/dma-imx-sdma.h> |
43 | #include <linux/platform_data/dma-imx.h> | |
1ec1e82f | 44 | |
d2ebfb33 RKAL |
45 | #include "dmaengine.h" |
46 | ||
1ec1e82f SH |
47 | /* SDMA registers */ |
48 | #define SDMA_H_C0PTR 0x000 | |
49 | #define SDMA_H_INTR 0x004 | |
50 | #define SDMA_H_STATSTOP 0x008 | |
51 | #define SDMA_H_START 0x00c | |
52 | #define SDMA_H_EVTOVR 0x010 | |
53 | #define SDMA_H_DSPOVR 0x014 | |
54 | #define SDMA_H_HOSTOVR 0x018 | |
55 | #define SDMA_H_EVTPEND 0x01c | |
56 | #define SDMA_H_DSPENBL 0x020 | |
57 | #define SDMA_H_RESET 0x024 | |
58 | #define SDMA_H_EVTERR 0x028 | |
59 | #define SDMA_H_INTRMSK 0x02c | |
60 | #define SDMA_H_PSW 0x030 | |
61 | #define SDMA_H_EVTERRDBG 0x034 | |
62 | #define SDMA_H_CONFIG 0x038 | |
63 | #define SDMA_ONCE_ENB 0x040 | |
64 | #define SDMA_ONCE_DATA 0x044 | |
65 | #define SDMA_ONCE_INSTR 0x048 | |
66 | #define SDMA_ONCE_STAT 0x04c | |
67 | #define SDMA_ONCE_CMD 0x050 | |
68 | #define SDMA_EVT_MIRROR 0x054 | |
69 | #define SDMA_ILLINSTADDR 0x058 | |
70 | #define SDMA_CHN0ADDR 0x05c | |
71 | #define SDMA_ONCE_RTB 0x060 | |
72 | #define SDMA_XTRIG_CONF1 0x070 | |
73 | #define SDMA_XTRIG_CONF2 0x074 | |
62550cd7 SG |
74 | #define SDMA_CHNENBL0_IMX35 0x200 |
75 | #define SDMA_CHNENBL0_IMX31 0x080 | |
1ec1e82f SH |
76 | #define SDMA_CHNPRI_0 0x100 |
77 | ||
78 | /* | |
79 | * Buffer descriptor status values. | |
80 | */ | |
81 | #define BD_DONE 0x01 | |
82 | #define BD_WRAP 0x02 | |
83 | #define BD_CONT 0x04 | |
84 | #define BD_INTR 0x08 | |
85 | #define BD_RROR 0x10 | |
86 | #define BD_LAST 0x20 | |
87 | #define BD_EXTD 0x80 | |
88 | ||
89 | /* | |
90 | * Data Node descriptor status values. | |
91 | */ | |
92 | #define DND_END_OF_FRAME 0x80 | |
93 | #define DND_END_OF_XFER 0x40 | |
94 | #define DND_DONE 0x20 | |
95 | #define DND_UNUSED 0x01 | |
96 | ||
97 | /* | |
98 | * IPCV2 descriptor status values. | |
99 | */ | |
100 | #define BD_IPCV2_END_OF_FRAME 0x40 | |
101 | ||
102 | #define IPCV2_MAX_NODES 50 | |
103 | /* | |
104 | * Error bit set in the CCB status field by the SDMA, | |
105 | * in setbd routine, in case of a transfer error | |
106 | */ | |
107 | #define DATA_ERROR 0x10000000 | |
108 | ||
109 | /* | |
110 | * Buffer descriptor commands. | |
111 | */ | |
112 | #define C0_ADDR 0x01 | |
113 | #define C0_LOAD 0x02 | |
114 | #define C0_DUMP 0x03 | |
115 | #define C0_SETCTX 0x07 | |
116 | #define C0_GETCTX 0x03 | |
117 | #define C0_SETDM 0x01 | |
118 | #define C0_SETPM 0x04 | |
119 | #define C0_GETDM 0x02 | |
120 | #define C0_GETPM 0x08 | |
121 | /* | |
122 | * Change endianness indicator in the BD command field | |
123 | */ | |
124 | #define CHANGE_ENDIANNESS 0x80 | |
125 | ||
126 | /* | |
127 | * Mode/Count of data node descriptors - IPCv2 | |
128 | */ | |
129 | struct sdma_mode_count { | |
130 | u32 count : 16; /* size of the buffer pointed by this BD */ | |
131 | u32 status : 8; /* E,R,I,C,W,D status bits stored here */ | |
132 | u32 command : 8; /* command mostlky used for channel 0 */ | |
133 | }; | |
134 | ||
135 | /* | |
136 | * Buffer descriptor | |
137 | */ | |
138 | struct sdma_buffer_descriptor { | |
139 | struct sdma_mode_count mode; | |
140 | u32 buffer_addr; /* address of the buffer described */ | |
141 | u32 ext_buffer_addr; /* extended buffer address */ | |
142 | } __attribute__ ((packed)); | |
143 | ||
144 | /** | |
145 | * struct sdma_channel_control - Channel control Block | |
146 | * | |
147 | * @current_bd_ptr current buffer descriptor processed | |
148 | * @base_bd_ptr first element of buffer descriptor array | |
149 | * @unused padding. The SDMA engine expects an array of 128 byte | |
150 | * control blocks | |
151 | */ | |
152 | struct sdma_channel_control { | |
153 | u32 current_bd_ptr; | |
154 | u32 base_bd_ptr; | |
155 | u32 unused[2]; | |
156 | } __attribute__ ((packed)); | |
157 | ||
158 | /** | |
159 | * struct sdma_state_registers - SDMA context for a channel | |
160 | * | |
161 | * @pc: program counter | |
162 | * @t: test bit: status of arithmetic & test instruction | |
163 | * @rpc: return program counter | |
164 | * @sf: source fault while loading data | |
165 | * @spc: loop start program counter | |
166 | * @df: destination fault while storing data | |
167 | * @epc: loop end program counter | |
168 | * @lm: loop mode | |
169 | */ | |
170 | struct sdma_state_registers { | |
171 | u32 pc :14; | |
172 | u32 unused1: 1; | |
173 | u32 t : 1; | |
174 | u32 rpc :14; | |
175 | u32 unused0: 1; | |
176 | u32 sf : 1; | |
177 | u32 spc :14; | |
178 | u32 unused2: 1; | |
179 | u32 df : 1; | |
180 | u32 epc :14; | |
181 | u32 lm : 2; | |
182 | } __attribute__ ((packed)); | |
183 | ||
184 | /** | |
185 | * struct sdma_context_data - sdma context specific to a channel | |
186 | * | |
187 | * @channel_state: channel state bits | |
188 | * @gReg: general registers | |
189 | * @mda: burst dma destination address register | |
190 | * @msa: burst dma source address register | |
191 | * @ms: burst dma status register | |
192 | * @md: burst dma data register | |
193 | * @pda: peripheral dma destination address register | |
194 | * @psa: peripheral dma source address register | |
195 | * @ps: peripheral dma status register | |
196 | * @pd: peripheral dma data register | |
197 | * @ca: CRC polynomial register | |
198 | * @cs: CRC accumulator register | |
199 | * @dda: dedicated core destination address register | |
200 | * @dsa: dedicated core source address register | |
201 | * @ds: dedicated core status register | |
202 | * @dd: dedicated core data register | |
203 | */ | |
204 | struct sdma_context_data { | |
205 | struct sdma_state_registers channel_state; | |
206 | u32 gReg[8]; | |
207 | u32 mda; | |
208 | u32 msa; | |
209 | u32 ms; | |
210 | u32 md; | |
211 | u32 pda; | |
212 | u32 psa; | |
213 | u32 ps; | |
214 | u32 pd; | |
215 | u32 ca; | |
216 | u32 cs; | |
217 | u32 dda; | |
218 | u32 dsa; | |
219 | u32 ds; | |
220 | u32 dd; | |
221 | u32 scratch0; | |
222 | u32 scratch1; | |
223 | u32 scratch2; | |
224 | u32 scratch3; | |
225 | u32 scratch4; | |
226 | u32 scratch5; | |
227 | u32 scratch6; | |
228 | u32 scratch7; | |
229 | } __attribute__ ((packed)); | |
230 | ||
231 | #define NUM_BD (int)(PAGE_SIZE / sizeof(struct sdma_buffer_descriptor)) | |
232 | ||
233 | struct sdma_engine; | |
234 | ||
235 | /** | |
236 | * struct sdma_channel - housekeeping for a SDMA channel | |
237 | * | |
238 | * @sdma pointer to the SDMA engine for this channel | |
23889c63 | 239 | * @channel the channel number, matches dmaengine chan_id + 1 |
1ec1e82f SH |
240 | * @direction transfer type. Needed for setting SDMA script |
241 | * @peripheral_type Peripheral type. Needed for setting SDMA script | |
242 | * @event_id0 aka dma request line | |
243 | * @event_id1 for channels that use 2 events | |
244 | * @word_size peripheral access size | |
245 | * @buf_tail ID of the buffer that was processed | |
1ec1e82f SH |
246 | * @num_bd max NUM_BD. number of descriptors currently handling |
247 | */ | |
248 | struct sdma_channel { | |
249 | struct sdma_engine *sdma; | |
250 | unsigned int channel; | |
db8196df | 251 | enum dma_transfer_direction direction; |
1ec1e82f SH |
252 | enum sdma_peripheral_type peripheral_type; |
253 | unsigned int event_id0; | |
254 | unsigned int event_id1; | |
255 | enum dma_slave_buswidth word_size; | |
256 | unsigned int buf_tail; | |
1ec1e82f SH |
257 | unsigned int num_bd; |
258 | struct sdma_buffer_descriptor *bd; | |
259 | dma_addr_t bd_phys; | |
260 | unsigned int pc_from_device, pc_to_device; | |
261 | unsigned long flags; | |
262 | dma_addr_t per_address; | |
0bbc1413 RZ |
263 | unsigned long event_mask[2]; |
264 | unsigned long watermark_level; | |
1ec1e82f SH |
265 | u32 shp_addr, per_addr; |
266 | struct dma_chan chan; | |
267 | spinlock_t lock; | |
268 | struct dma_async_tx_descriptor desc; | |
1ec1e82f | 269 | enum dma_status status; |
ab59a510 HS |
270 | unsigned int chn_count; |
271 | unsigned int chn_real_count; | |
abd9ccc8 | 272 | struct tasklet_struct tasklet; |
1ec1e82f SH |
273 | }; |
274 | ||
0bbc1413 | 275 | #define IMX_DMA_SG_LOOP BIT(0) |
1ec1e82f SH |
276 | |
277 | #define MAX_DMA_CHANNELS 32 | |
278 | #define MXC_SDMA_DEFAULT_PRIORITY 1 | |
279 | #define MXC_SDMA_MIN_PRIORITY 1 | |
280 | #define MXC_SDMA_MAX_PRIORITY 7 | |
281 | ||
1ec1e82f SH |
282 | #define SDMA_FIRMWARE_MAGIC 0x414d4453 |
283 | ||
284 | /** | |
285 | * struct sdma_firmware_header - Layout of the firmware image | |
286 | * | |
287 | * @magic "SDMA" | |
288 | * @version_major increased whenever layout of struct sdma_script_start_addrs | |
289 | * changes. | |
290 | * @version_minor firmware minor version (for binary compatible changes) | |
291 | * @script_addrs_start offset of struct sdma_script_start_addrs in this image | |
292 | * @num_script_addrs Number of script addresses in this image | |
293 | * @ram_code_start offset of SDMA ram image in this firmware image | |
294 | * @ram_code_size size of SDMA ram image | |
295 | * @script_addrs Stores the start address of the SDMA scripts | |
296 | * (in SDMA memory space) | |
297 | */ | |
298 | struct sdma_firmware_header { | |
299 | u32 magic; | |
300 | u32 version_major; | |
301 | u32 version_minor; | |
302 | u32 script_addrs_start; | |
303 | u32 num_script_addrs; | |
304 | u32 ram_code_start; | |
305 | u32 ram_code_size; | |
306 | }; | |
307 | ||
17bba72f SH |
308 | struct sdma_driver_data { |
309 | int chnenbl0; | |
310 | int num_events; | |
dcfec3c0 | 311 | struct sdma_script_start_addrs *script_addrs; |
62550cd7 SG |
312 | }; |
313 | ||
1ec1e82f SH |
314 | struct sdma_engine { |
315 | struct device *dev; | |
b9b3f82f | 316 | struct device_dma_parameters dma_parms; |
1ec1e82f SH |
317 | struct sdma_channel channel[MAX_DMA_CHANNELS]; |
318 | struct sdma_channel_control *channel_control; | |
319 | void __iomem *regs; | |
1ec1e82f SH |
320 | struct sdma_context_data *context; |
321 | dma_addr_t context_phys; | |
322 | struct dma_device dma_device; | |
7560e3f3 SH |
323 | struct clk *clk_ipg; |
324 | struct clk *clk_ahb; | |
2ccaef05 | 325 | spinlock_t channel_0_lock; |
1ec1e82f | 326 | struct sdma_script_start_addrs *script_addrs; |
17bba72f SH |
327 | const struct sdma_driver_data *drvdata; |
328 | }; | |
329 | ||
e9fd58de | 330 | static struct sdma_driver_data sdma_imx31 = { |
17bba72f SH |
331 | .chnenbl0 = SDMA_CHNENBL0_IMX31, |
332 | .num_events = 32, | |
333 | }; | |
334 | ||
dcfec3c0 SH |
335 | static struct sdma_script_start_addrs sdma_script_imx25 = { |
336 | .ap_2_ap_addr = 729, | |
337 | .uart_2_mcu_addr = 904, | |
338 | .per_2_app_addr = 1255, | |
339 | .mcu_2_app_addr = 834, | |
340 | .uartsh_2_mcu_addr = 1120, | |
341 | .per_2_shp_addr = 1329, | |
342 | .mcu_2_shp_addr = 1048, | |
343 | .ata_2_mcu_addr = 1560, | |
344 | .mcu_2_ata_addr = 1479, | |
345 | .app_2_per_addr = 1189, | |
346 | .app_2_mcu_addr = 770, | |
347 | .shp_2_per_addr = 1407, | |
348 | .shp_2_mcu_addr = 979, | |
349 | }; | |
350 | ||
e9fd58de | 351 | static struct sdma_driver_data sdma_imx25 = { |
dcfec3c0 SH |
352 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
353 | .num_events = 48, | |
354 | .script_addrs = &sdma_script_imx25, | |
355 | }; | |
356 | ||
e9fd58de | 357 | static struct sdma_driver_data sdma_imx35 = { |
17bba72f SH |
358 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
359 | .num_events = 48, | |
1ec1e82f SH |
360 | }; |
361 | ||
dcfec3c0 SH |
362 | static struct sdma_script_start_addrs sdma_script_imx51 = { |
363 | .ap_2_ap_addr = 642, | |
364 | .uart_2_mcu_addr = 817, | |
365 | .mcu_2_app_addr = 747, | |
366 | .mcu_2_shp_addr = 961, | |
367 | .ata_2_mcu_addr = 1473, | |
368 | .mcu_2_ata_addr = 1392, | |
369 | .app_2_per_addr = 1033, | |
370 | .app_2_mcu_addr = 683, | |
371 | .shp_2_per_addr = 1251, | |
372 | .shp_2_mcu_addr = 892, | |
373 | }; | |
374 | ||
e9fd58de | 375 | static struct sdma_driver_data sdma_imx51 = { |
dcfec3c0 SH |
376 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
377 | .num_events = 48, | |
378 | .script_addrs = &sdma_script_imx51, | |
379 | }; | |
380 | ||
381 | static struct sdma_script_start_addrs sdma_script_imx53 = { | |
382 | .ap_2_ap_addr = 642, | |
383 | .app_2_mcu_addr = 683, | |
384 | .mcu_2_app_addr = 747, | |
385 | .uart_2_mcu_addr = 817, | |
386 | .shp_2_mcu_addr = 891, | |
387 | .mcu_2_shp_addr = 960, | |
388 | .uartsh_2_mcu_addr = 1032, | |
389 | .spdif_2_mcu_addr = 1100, | |
390 | .mcu_2_spdif_addr = 1134, | |
391 | .firi_2_mcu_addr = 1193, | |
392 | .mcu_2_firi_addr = 1290, | |
393 | }; | |
394 | ||
e9fd58de | 395 | static struct sdma_driver_data sdma_imx53 = { |
dcfec3c0 SH |
396 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
397 | .num_events = 48, | |
398 | .script_addrs = &sdma_script_imx53, | |
399 | }; | |
400 | ||
401 | static struct sdma_script_start_addrs sdma_script_imx6q = { | |
402 | .ap_2_ap_addr = 642, | |
403 | .uart_2_mcu_addr = 817, | |
404 | .mcu_2_app_addr = 747, | |
405 | .per_2_per_addr = 6331, | |
406 | .uartsh_2_mcu_addr = 1032, | |
407 | .mcu_2_shp_addr = 960, | |
408 | .app_2_mcu_addr = 683, | |
409 | .shp_2_mcu_addr = 891, | |
410 | .spdif_2_mcu_addr = 1100, | |
411 | .mcu_2_spdif_addr = 1134, | |
412 | }; | |
413 | ||
e9fd58de | 414 | static struct sdma_driver_data sdma_imx6q = { |
dcfec3c0 SH |
415 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
416 | .num_events = 48, | |
417 | .script_addrs = &sdma_script_imx6q, | |
418 | }; | |
419 | ||
62550cd7 SG |
420 | static struct platform_device_id sdma_devtypes[] = { |
421 | { | |
dcfec3c0 SH |
422 | .name = "imx25-sdma", |
423 | .driver_data = (unsigned long)&sdma_imx25, | |
424 | }, { | |
62550cd7 | 425 | .name = "imx31-sdma", |
17bba72f | 426 | .driver_data = (unsigned long)&sdma_imx31, |
62550cd7 SG |
427 | }, { |
428 | .name = "imx35-sdma", | |
17bba72f | 429 | .driver_data = (unsigned long)&sdma_imx35, |
dcfec3c0 SH |
430 | }, { |
431 | .name = "imx51-sdma", | |
432 | .driver_data = (unsigned long)&sdma_imx51, | |
433 | }, { | |
434 | .name = "imx53-sdma", | |
435 | .driver_data = (unsigned long)&sdma_imx53, | |
436 | }, { | |
437 | .name = "imx6q-sdma", | |
438 | .driver_data = (unsigned long)&sdma_imx6q, | |
62550cd7 SG |
439 | }, { |
440 | /* sentinel */ | |
441 | } | |
442 | }; | |
443 | MODULE_DEVICE_TABLE(platform, sdma_devtypes); | |
444 | ||
580975d7 | 445 | static const struct of_device_id sdma_dt_ids[] = { |
dcfec3c0 SH |
446 | { .compatible = "fsl,imx6q-sdma", .data = &sdma_imx6q, }, |
447 | { .compatible = "fsl,imx53-sdma", .data = &sdma_imx53, }, | |
448 | { .compatible = "fsl,imx51-sdma", .data = &sdma_imx51, }, | |
17bba72f | 449 | { .compatible = "fsl,imx35-sdma", .data = &sdma_imx35, }, |
dcfec3c0 | 450 | { .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, }, |
580975d7 SG |
451 | { /* sentinel */ } |
452 | }; | |
453 | MODULE_DEVICE_TABLE(of, sdma_dt_ids); | |
454 | ||
0bbc1413 RZ |
455 | #define SDMA_H_CONFIG_DSPDMA BIT(12) /* indicates if the DSPDMA is used */ |
456 | #define SDMA_H_CONFIG_RTD_PINS BIT(11) /* indicates if Real-Time Debug pins are enabled */ | |
457 | #define SDMA_H_CONFIG_ACR BIT(4) /* indicates if AHB freq /core freq = 2 or 1 */ | |
1ec1e82f SH |
458 | #define SDMA_H_CONFIG_CSM (3) /* indicates which context switch mode is selected*/ |
459 | ||
460 | static inline u32 chnenbl_ofs(struct sdma_engine *sdma, unsigned int event) | |
461 | { | |
17bba72f | 462 | u32 chnenbl0 = sdma->drvdata->chnenbl0; |
1ec1e82f SH |
463 | return chnenbl0 + event * 4; |
464 | } | |
465 | ||
466 | static int sdma_config_ownership(struct sdma_channel *sdmac, | |
467 | bool event_override, bool mcu_override, bool dsp_override) | |
468 | { | |
469 | struct sdma_engine *sdma = sdmac->sdma; | |
470 | int channel = sdmac->channel; | |
0bbc1413 | 471 | unsigned long evt, mcu, dsp; |
1ec1e82f SH |
472 | |
473 | if (event_override && mcu_override && dsp_override) | |
474 | return -EINVAL; | |
475 | ||
c4b56857 RZ |
476 | evt = readl_relaxed(sdma->regs + SDMA_H_EVTOVR); |
477 | mcu = readl_relaxed(sdma->regs + SDMA_H_HOSTOVR); | |
478 | dsp = readl_relaxed(sdma->regs + SDMA_H_DSPOVR); | |
1ec1e82f SH |
479 | |
480 | if (dsp_override) | |
0bbc1413 | 481 | __clear_bit(channel, &dsp); |
1ec1e82f | 482 | else |
0bbc1413 | 483 | __set_bit(channel, &dsp); |
1ec1e82f SH |
484 | |
485 | if (event_override) | |
0bbc1413 | 486 | __clear_bit(channel, &evt); |
1ec1e82f | 487 | else |
0bbc1413 | 488 | __set_bit(channel, &evt); |
1ec1e82f SH |
489 | |
490 | if (mcu_override) | |
0bbc1413 | 491 | __clear_bit(channel, &mcu); |
1ec1e82f | 492 | else |
0bbc1413 | 493 | __set_bit(channel, &mcu); |
1ec1e82f | 494 | |
c4b56857 RZ |
495 | writel_relaxed(evt, sdma->regs + SDMA_H_EVTOVR); |
496 | writel_relaxed(mcu, sdma->regs + SDMA_H_HOSTOVR); | |
497 | writel_relaxed(dsp, sdma->regs + SDMA_H_DSPOVR); | |
1ec1e82f SH |
498 | |
499 | return 0; | |
500 | } | |
501 | ||
b9a59166 RZ |
502 | static void sdma_enable_channel(struct sdma_engine *sdma, int channel) |
503 | { | |
0bbc1413 | 504 | writel(BIT(channel), sdma->regs + SDMA_H_START); |
b9a59166 RZ |
505 | } |
506 | ||
1ec1e82f | 507 | /* |
2ccaef05 | 508 | * sdma_run_channel0 - run a channel and wait till it's done |
1ec1e82f | 509 | */ |
2ccaef05 | 510 | static int sdma_run_channel0(struct sdma_engine *sdma) |
1ec1e82f | 511 | { |
1ec1e82f | 512 | int ret; |
2ccaef05 | 513 | unsigned long timeout = 500; |
1ec1e82f | 514 | |
2ccaef05 | 515 | sdma_enable_channel(sdma, 0); |
1ec1e82f | 516 | |
2ccaef05 RZ |
517 | while (!(ret = readl_relaxed(sdma->regs + SDMA_H_INTR) & 1)) { |
518 | if (timeout-- <= 0) | |
519 | break; | |
520 | udelay(1); | |
521 | } | |
1ec1e82f | 522 | |
2ccaef05 RZ |
523 | if (ret) { |
524 | /* Clear the interrupt status */ | |
525 | writel_relaxed(ret, sdma->regs + SDMA_H_INTR); | |
526 | } else { | |
527 | dev_err(sdma->dev, "Timeout waiting for CH0 ready\n"); | |
528 | } | |
1ec1e82f SH |
529 | |
530 | return ret ? 0 : -ETIMEDOUT; | |
531 | } | |
532 | ||
533 | static int sdma_load_script(struct sdma_engine *sdma, void *buf, int size, | |
534 | u32 address) | |
535 | { | |
536 | struct sdma_buffer_descriptor *bd0 = sdma->channel[0].bd; | |
537 | void *buf_virt; | |
538 | dma_addr_t buf_phys; | |
539 | int ret; | |
2ccaef05 | 540 | unsigned long flags; |
73eab978 | 541 | |
1ec1e82f SH |
542 | buf_virt = dma_alloc_coherent(NULL, |
543 | size, | |
544 | &buf_phys, GFP_KERNEL); | |
73eab978 | 545 | if (!buf_virt) { |
2ccaef05 | 546 | return -ENOMEM; |
73eab978 | 547 | } |
1ec1e82f | 548 | |
2ccaef05 RZ |
549 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
550 | ||
1ec1e82f SH |
551 | bd0->mode.command = C0_SETPM; |
552 | bd0->mode.status = BD_DONE | BD_INTR | BD_WRAP | BD_EXTD; | |
553 | bd0->mode.count = size / 2; | |
554 | bd0->buffer_addr = buf_phys; | |
555 | bd0->ext_buffer_addr = address; | |
556 | ||
557 | memcpy(buf_virt, buf, size); | |
558 | ||
2ccaef05 | 559 | ret = sdma_run_channel0(sdma); |
1ec1e82f | 560 | |
2ccaef05 | 561 | spin_unlock_irqrestore(&sdma->channel_0_lock, flags); |
1ec1e82f | 562 | |
2ccaef05 | 563 | dma_free_coherent(NULL, size, buf_virt, buf_phys); |
73eab978 | 564 | |
1ec1e82f SH |
565 | return ret; |
566 | } | |
567 | ||
568 | static void sdma_event_enable(struct sdma_channel *sdmac, unsigned int event) | |
569 | { | |
570 | struct sdma_engine *sdma = sdmac->sdma; | |
571 | int channel = sdmac->channel; | |
0bbc1413 | 572 | unsigned long val; |
1ec1e82f SH |
573 | u32 chnenbl = chnenbl_ofs(sdma, event); |
574 | ||
c4b56857 | 575 | val = readl_relaxed(sdma->regs + chnenbl); |
0bbc1413 | 576 | __set_bit(channel, &val); |
c4b56857 | 577 | writel_relaxed(val, sdma->regs + chnenbl); |
1ec1e82f SH |
578 | } |
579 | ||
580 | static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event) | |
581 | { | |
582 | struct sdma_engine *sdma = sdmac->sdma; | |
583 | int channel = sdmac->channel; | |
584 | u32 chnenbl = chnenbl_ofs(sdma, event); | |
0bbc1413 | 585 | unsigned long val; |
1ec1e82f | 586 | |
c4b56857 | 587 | val = readl_relaxed(sdma->regs + chnenbl); |
0bbc1413 | 588 | __clear_bit(channel, &val); |
c4b56857 | 589 | writel_relaxed(val, sdma->regs + chnenbl); |
1ec1e82f SH |
590 | } |
591 | ||
592 | static void sdma_handle_channel_loop(struct sdma_channel *sdmac) | |
593 | { | |
594 | struct sdma_buffer_descriptor *bd; | |
595 | ||
596 | /* | |
597 | * loop mode. Iterate over descriptors, re-setup them and | |
598 | * call callback function. | |
599 | */ | |
600 | while (1) { | |
601 | bd = &sdmac->bd[sdmac->buf_tail]; | |
602 | ||
603 | if (bd->mode.status & BD_DONE) | |
604 | break; | |
605 | ||
606 | if (bd->mode.status & BD_RROR) | |
607 | sdmac->status = DMA_ERROR; | |
608 | else | |
1e9cebb4 | 609 | sdmac->status = DMA_IN_PROGRESS; |
1ec1e82f SH |
610 | |
611 | bd->mode.status |= BD_DONE; | |
612 | sdmac->buf_tail++; | |
613 | sdmac->buf_tail %= sdmac->num_bd; | |
614 | ||
615 | if (sdmac->desc.callback) | |
616 | sdmac->desc.callback(sdmac->desc.callback_param); | |
617 | } | |
618 | } | |
619 | ||
620 | static void mxc_sdma_handle_channel_normal(struct sdma_channel *sdmac) | |
621 | { | |
622 | struct sdma_buffer_descriptor *bd; | |
623 | int i, error = 0; | |
624 | ||
ab59a510 | 625 | sdmac->chn_real_count = 0; |
1ec1e82f SH |
626 | /* |
627 | * non loop mode. Iterate over all descriptors, collect | |
628 | * errors and call callback function | |
629 | */ | |
630 | for (i = 0; i < sdmac->num_bd; i++) { | |
631 | bd = &sdmac->bd[i]; | |
632 | ||
633 | if (bd->mode.status & (BD_DONE | BD_RROR)) | |
634 | error = -EIO; | |
ab59a510 | 635 | sdmac->chn_real_count += bd->mode.count; |
1ec1e82f SH |
636 | } |
637 | ||
638 | if (error) | |
639 | sdmac->status = DMA_ERROR; | |
640 | else | |
409bff6a | 641 | sdmac->status = DMA_COMPLETE; |
1ec1e82f | 642 | |
f7fbce07 | 643 | dma_cookie_complete(&sdmac->desc); |
1ec1e82f SH |
644 | if (sdmac->desc.callback) |
645 | sdmac->desc.callback(sdmac->desc.callback_param); | |
1ec1e82f SH |
646 | } |
647 | ||
abd9ccc8 | 648 | static void sdma_tasklet(unsigned long data) |
1ec1e82f | 649 | { |
abd9ccc8 HS |
650 | struct sdma_channel *sdmac = (struct sdma_channel *) data; |
651 | ||
1ec1e82f SH |
652 | if (sdmac->flags & IMX_DMA_SG_LOOP) |
653 | sdma_handle_channel_loop(sdmac); | |
654 | else | |
655 | mxc_sdma_handle_channel_normal(sdmac); | |
656 | } | |
657 | ||
658 | static irqreturn_t sdma_int_handler(int irq, void *dev_id) | |
659 | { | |
660 | struct sdma_engine *sdma = dev_id; | |
0bbc1413 | 661 | unsigned long stat; |
1ec1e82f | 662 | |
c4b56857 | 663 | stat = readl_relaxed(sdma->regs + SDMA_H_INTR); |
2ccaef05 RZ |
664 | /* not interested in channel 0 interrupts */ |
665 | stat &= ~1; | |
c4b56857 | 666 | writel_relaxed(stat, sdma->regs + SDMA_H_INTR); |
1ec1e82f SH |
667 | |
668 | while (stat) { | |
669 | int channel = fls(stat) - 1; | |
670 | struct sdma_channel *sdmac = &sdma->channel[channel]; | |
671 | ||
abd9ccc8 | 672 | tasklet_schedule(&sdmac->tasklet); |
1ec1e82f | 673 | |
0bbc1413 | 674 | __clear_bit(channel, &stat); |
1ec1e82f SH |
675 | } |
676 | ||
677 | return IRQ_HANDLED; | |
678 | } | |
679 | ||
680 | /* | |
681 | * sets the pc of SDMA script according to the peripheral type | |
682 | */ | |
683 | static void sdma_get_pc(struct sdma_channel *sdmac, | |
684 | enum sdma_peripheral_type peripheral_type) | |
685 | { | |
686 | struct sdma_engine *sdma = sdmac->sdma; | |
687 | int per_2_emi = 0, emi_2_per = 0; | |
688 | /* | |
689 | * These are needed once we start to support transfers between | |
690 | * two peripherals or memory-to-memory transfers | |
691 | */ | |
692 | int per_2_per = 0, emi_2_emi = 0; | |
693 | ||
694 | sdmac->pc_from_device = 0; | |
695 | sdmac->pc_to_device = 0; | |
696 | ||
697 | switch (peripheral_type) { | |
698 | case IMX_DMATYPE_MEMORY: | |
699 | emi_2_emi = sdma->script_addrs->ap_2_ap_addr; | |
700 | break; | |
701 | case IMX_DMATYPE_DSP: | |
702 | emi_2_per = sdma->script_addrs->bp_2_ap_addr; | |
703 | per_2_emi = sdma->script_addrs->ap_2_bp_addr; | |
704 | break; | |
705 | case IMX_DMATYPE_FIRI: | |
706 | per_2_emi = sdma->script_addrs->firi_2_mcu_addr; | |
707 | emi_2_per = sdma->script_addrs->mcu_2_firi_addr; | |
708 | break; | |
709 | case IMX_DMATYPE_UART: | |
710 | per_2_emi = sdma->script_addrs->uart_2_mcu_addr; | |
711 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; | |
712 | break; | |
713 | case IMX_DMATYPE_UART_SP: | |
714 | per_2_emi = sdma->script_addrs->uartsh_2_mcu_addr; | |
715 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
716 | break; | |
717 | case IMX_DMATYPE_ATA: | |
718 | per_2_emi = sdma->script_addrs->ata_2_mcu_addr; | |
719 | emi_2_per = sdma->script_addrs->mcu_2_ata_addr; | |
720 | break; | |
721 | case IMX_DMATYPE_CSPI: | |
722 | case IMX_DMATYPE_EXT: | |
723 | case IMX_DMATYPE_SSI: | |
724 | per_2_emi = sdma->script_addrs->app_2_mcu_addr; | |
725 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; | |
726 | break; | |
727 | case IMX_DMATYPE_SSI_SP: | |
728 | case IMX_DMATYPE_MMC: | |
729 | case IMX_DMATYPE_SDHC: | |
730 | case IMX_DMATYPE_CSPI_SP: | |
731 | case IMX_DMATYPE_ESAI: | |
732 | case IMX_DMATYPE_MSHC_SP: | |
733 | per_2_emi = sdma->script_addrs->shp_2_mcu_addr; | |
734 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
735 | break; | |
736 | case IMX_DMATYPE_ASRC: | |
737 | per_2_emi = sdma->script_addrs->asrc_2_mcu_addr; | |
738 | emi_2_per = sdma->script_addrs->asrc_2_mcu_addr; | |
739 | per_2_per = sdma->script_addrs->per_2_per_addr; | |
740 | break; | |
741 | case IMX_DMATYPE_MSHC: | |
742 | per_2_emi = sdma->script_addrs->mshc_2_mcu_addr; | |
743 | emi_2_per = sdma->script_addrs->mcu_2_mshc_addr; | |
744 | break; | |
745 | case IMX_DMATYPE_CCM: | |
746 | per_2_emi = sdma->script_addrs->dptc_dvfs_addr; | |
747 | break; | |
748 | case IMX_DMATYPE_SPDIF: | |
749 | per_2_emi = sdma->script_addrs->spdif_2_mcu_addr; | |
750 | emi_2_per = sdma->script_addrs->mcu_2_spdif_addr; | |
751 | break; | |
752 | case IMX_DMATYPE_IPU_MEMORY: | |
753 | emi_2_per = sdma->script_addrs->ext_mem_2_ipu_addr; | |
754 | break; | |
755 | default: | |
756 | break; | |
757 | } | |
758 | ||
759 | sdmac->pc_from_device = per_2_emi; | |
760 | sdmac->pc_to_device = emi_2_per; | |
761 | } | |
762 | ||
763 | static int sdma_load_context(struct sdma_channel *sdmac) | |
764 | { | |
765 | struct sdma_engine *sdma = sdmac->sdma; | |
766 | int channel = sdmac->channel; | |
767 | int load_address; | |
768 | struct sdma_context_data *context = sdma->context; | |
769 | struct sdma_buffer_descriptor *bd0 = sdma->channel[0].bd; | |
770 | int ret; | |
2ccaef05 | 771 | unsigned long flags; |
1ec1e82f | 772 | |
db8196df | 773 | if (sdmac->direction == DMA_DEV_TO_MEM) { |
1ec1e82f SH |
774 | load_address = sdmac->pc_from_device; |
775 | } else { | |
776 | load_address = sdmac->pc_to_device; | |
777 | } | |
778 | ||
779 | if (load_address < 0) | |
780 | return load_address; | |
781 | ||
782 | dev_dbg(sdma->dev, "load_address = %d\n", load_address); | |
0bbc1413 | 783 | dev_dbg(sdma->dev, "wml = 0x%08x\n", (u32)sdmac->watermark_level); |
1ec1e82f SH |
784 | dev_dbg(sdma->dev, "shp_addr = 0x%08x\n", sdmac->shp_addr); |
785 | dev_dbg(sdma->dev, "per_addr = 0x%08x\n", sdmac->per_addr); | |
0bbc1413 RZ |
786 | dev_dbg(sdma->dev, "event_mask0 = 0x%08x\n", (u32)sdmac->event_mask[0]); |
787 | dev_dbg(sdma->dev, "event_mask1 = 0x%08x\n", (u32)sdmac->event_mask[1]); | |
1ec1e82f | 788 | |
2ccaef05 | 789 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
73eab978 | 790 | |
1ec1e82f SH |
791 | memset(context, 0, sizeof(*context)); |
792 | context->channel_state.pc = load_address; | |
793 | ||
794 | /* Send by context the event mask,base address for peripheral | |
795 | * and watermark level | |
796 | */ | |
0bbc1413 RZ |
797 | context->gReg[0] = sdmac->event_mask[1]; |
798 | context->gReg[1] = sdmac->event_mask[0]; | |
1ec1e82f SH |
799 | context->gReg[2] = sdmac->per_addr; |
800 | context->gReg[6] = sdmac->shp_addr; | |
801 | context->gReg[7] = sdmac->watermark_level; | |
802 | ||
803 | bd0->mode.command = C0_SETDM; | |
804 | bd0->mode.status = BD_DONE | BD_INTR | BD_WRAP | BD_EXTD; | |
805 | bd0->mode.count = sizeof(*context) / 4; | |
806 | bd0->buffer_addr = sdma->context_phys; | |
807 | bd0->ext_buffer_addr = 2048 + (sizeof(*context) / 4) * channel; | |
2ccaef05 | 808 | ret = sdma_run_channel0(sdma); |
1ec1e82f | 809 | |
2ccaef05 | 810 | spin_unlock_irqrestore(&sdma->channel_0_lock, flags); |
73eab978 | 811 | |
1ec1e82f SH |
812 | return ret; |
813 | } | |
814 | ||
815 | static void sdma_disable_channel(struct sdma_channel *sdmac) | |
816 | { | |
817 | struct sdma_engine *sdma = sdmac->sdma; | |
818 | int channel = sdmac->channel; | |
819 | ||
0bbc1413 | 820 | writel_relaxed(BIT(channel), sdma->regs + SDMA_H_STATSTOP); |
1ec1e82f SH |
821 | sdmac->status = DMA_ERROR; |
822 | } | |
823 | ||
824 | static int sdma_config_channel(struct sdma_channel *sdmac) | |
825 | { | |
826 | int ret; | |
827 | ||
828 | sdma_disable_channel(sdmac); | |
829 | ||
0bbc1413 RZ |
830 | sdmac->event_mask[0] = 0; |
831 | sdmac->event_mask[1] = 0; | |
1ec1e82f SH |
832 | sdmac->shp_addr = 0; |
833 | sdmac->per_addr = 0; | |
834 | ||
835 | if (sdmac->event_id0) { | |
17bba72f | 836 | if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events) |
1ec1e82f SH |
837 | return -EINVAL; |
838 | sdma_event_enable(sdmac, sdmac->event_id0); | |
839 | } | |
840 | ||
841 | switch (sdmac->peripheral_type) { | |
842 | case IMX_DMATYPE_DSP: | |
843 | sdma_config_ownership(sdmac, false, true, true); | |
844 | break; | |
845 | case IMX_DMATYPE_MEMORY: | |
846 | sdma_config_ownership(sdmac, false, true, false); | |
847 | break; | |
848 | default: | |
849 | sdma_config_ownership(sdmac, true, true, false); | |
850 | break; | |
851 | } | |
852 | ||
853 | sdma_get_pc(sdmac, sdmac->peripheral_type); | |
854 | ||
855 | if ((sdmac->peripheral_type != IMX_DMATYPE_MEMORY) && | |
856 | (sdmac->peripheral_type != IMX_DMATYPE_DSP)) { | |
857 | /* Handle multiple event channels differently */ | |
858 | if (sdmac->event_id1) { | |
0bbc1413 | 859 | sdmac->event_mask[1] = BIT(sdmac->event_id1 % 32); |
1ec1e82f | 860 | if (sdmac->event_id1 > 31) |
0bbc1413 RZ |
861 | __set_bit(31, &sdmac->watermark_level); |
862 | sdmac->event_mask[0] = BIT(sdmac->event_id0 % 32); | |
1ec1e82f | 863 | if (sdmac->event_id0 > 31) |
0bbc1413 | 864 | __set_bit(30, &sdmac->watermark_level); |
1ec1e82f | 865 | } else { |
0bbc1413 | 866 | __set_bit(sdmac->event_id0, sdmac->event_mask); |
1ec1e82f SH |
867 | } |
868 | /* Watermark Level */ | |
869 | sdmac->watermark_level |= sdmac->watermark_level; | |
870 | /* Address */ | |
871 | sdmac->shp_addr = sdmac->per_address; | |
872 | } else { | |
873 | sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */ | |
874 | } | |
875 | ||
876 | ret = sdma_load_context(sdmac); | |
877 | ||
878 | return ret; | |
879 | } | |
880 | ||
881 | static int sdma_set_channel_priority(struct sdma_channel *sdmac, | |
882 | unsigned int priority) | |
883 | { | |
884 | struct sdma_engine *sdma = sdmac->sdma; | |
885 | int channel = sdmac->channel; | |
886 | ||
887 | if (priority < MXC_SDMA_MIN_PRIORITY | |
888 | || priority > MXC_SDMA_MAX_PRIORITY) { | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
c4b56857 | 892 | writel_relaxed(priority, sdma->regs + SDMA_CHNPRI_0 + 4 * channel); |
1ec1e82f SH |
893 | |
894 | return 0; | |
895 | } | |
896 | ||
897 | static int sdma_request_channel(struct sdma_channel *sdmac) | |
898 | { | |
899 | struct sdma_engine *sdma = sdmac->sdma; | |
900 | int channel = sdmac->channel; | |
901 | int ret = -EBUSY; | |
902 | ||
903 | sdmac->bd = dma_alloc_coherent(NULL, PAGE_SIZE, &sdmac->bd_phys, GFP_KERNEL); | |
904 | if (!sdmac->bd) { | |
905 | ret = -ENOMEM; | |
906 | goto out; | |
907 | } | |
908 | ||
909 | memset(sdmac->bd, 0, PAGE_SIZE); | |
910 | ||
911 | sdma->channel_control[channel].base_bd_ptr = sdmac->bd_phys; | |
912 | sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys; | |
913 | ||
1ec1e82f | 914 | sdma_set_channel_priority(sdmac, MXC_SDMA_DEFAULT_PRIORITY); |
1ec1e82f SH |
915 | return 0; |
916 | out: | |
917 | ||
918 | return ret; | |
919 | } | |
920 | ||
1ec1e82f SH |
921 | static struct sdma_channel *to_sdma_chan(struct dma_chan *chan) |
922 | { | |
923 | return container_of(chan, struct sdma_channel, chan); | |
924 | } | |
925 | ||
926 | static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx) | |
927 | { | |
f69f2e26 | 928 | unsigned long flags; |
1ec1e82f | 929 | struct sdma_channel *sdmac = to_sdma_chan(tx->chan); |
1ec1e82f SH |
930 | dma_cookie_t cookie; |
931 | ||
f69f2e26 | 932 | spin_lock_irqsave(&sdmac->lock, flags); |
1ec1e82f | 933 | |
884485e1 | 934 | cookie = dma_cookie_assign(tx); |
1ec1e82f | 935 | |
f69f2e26 | 936 | spin_unlock_irqrestore(&sdmac->lock, flags); |
1ec1e82f SH |
937 | |
938 | return cookie; | |
939 | } | |
940 | ||
941 | static int sdma_alloc_chan_resources(struct dma_chan *chan) | |
942 | { | |
943 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
944 | struct imx_dma_data *data = chan->private; | |
945 | int prio, ret; | |
946 | ||
1ec1e82f SH |
947 | if (!data) |
948 | return -EINVAL; | |
949 | ||
950 | switch (data->priority) { | |
951 | case DMA_PRIO_HIGH: | |
952 | prio = 3; | |
953 | break; | |
954 | case DMA_PRIO_MEDIUM: | |
955 | prio = 2; | |
956 | break; | |
957 | case DMA_PRIO_LOW: | |
958 | default: | |
959 | prio = 1; | |
960 | break; | |
961 | } | |
962 | ||
963 | sdmac->peripheral_type = data->peripheral_type; | |
964 | sdmac->event_id0 = data->dma_request; | |
c2c744d3 | 965 | |
7560e3f3 SH |
966 | clk_enable(sdmac->sdma->clk_ipg); |
967 | clk_enable(sdmac->sdma->clk_ahb); | |
c2c744d3 | 968 | |
3bb5e7ca | 969 | ret = sdma_request_channel(sdmac); |
1ec1e82f SH |
970 | if (ret) |
971 | return ret; | |
972 | ||
3bb5e7ca | 973 | ret = sdma_set_channel_priority(sdmac, prio); |
1ec1e82f SH |
974 | if (ret) |
975 | return ret; | |
976 | ||
977 | dma_async_tx_descriptor_init(&sdmac->desc, chan); | |
978 | sdmac->desc.tx_submit = sdma_tx_submit; | |
979 | /* txd.flags will be overwritten in prep funcs */ | |
980 | sdmac->desc.flags = DMA_CTRL_ACK; | |
981 | ||
982 | return 0; | |
983 | } | |
984 | ||
985 | static void sdma_free_chan_resources(struct dma_chan *chan) | |
986 | { | |
987 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
988 | struct sdma_engine *sdma = sdmac->sdma; | |
989 | ||
990 | sdma_disable_channel(sdmac); | |
991 | ||
992 | if (sdmac->event_id0) | |
993 | sdma_event_disable(sdmac, sdmac->event_id0); | |
994 | if (sdmac->event_id1) | |
995 | sdma_event_disable(sdmac, sdmac->event_id1); | |
996 | ||
997 | sdmac->event_id0 = 0; | |
998 | sdmac->event_id1 = 0; | |
999 | ||
1000 | sdma_set_channel_priority(sdmac, 0); | |
1001 | ||
1002 | dma_free_coherent(NULL, PAGE_SIZE, sdmac->bd, sdmac->bd_phys); | |
1003 | ||
7560e3f3 SH |
1004 | clk_disable(sdma->clk_ipg); |
1005 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1006 | } |
1007 | ||
1008 | static struct dma_async_tx_descriptor *sdma_prep_slave_sg( | |
1009 | struct dma_chan *chan, struct scatterlist *sgl, | |
db8196df | 1010 | unsigned int sg_len, enum dma_transfer_direction direction, |
185ecb5f | 1011 | unsigned long flags, void *context) |
1ec1e82f SH |
1012 | { |
1013 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1014 | struct sdma_engine *sdma = sdmac->sdma; | |
1015 | int ret, i, count; | |
23889c63 | 1016 | int channel = sdmac->channel; |
1ec1e82f SH |
1017 | struct scatterlist *sg; |
1018 | ||
1019 | if (sdmac->status == DMA_IN_PROGRESS) | |
1020 | return NULL; | |
1021 | sdmac->status = DMA_IN_PROGRESS; | |
1022 | ||
1023 | sdmac->flags = 0; | |
1024 | ||
8e2e27c7 RZ |
1025 | sdmac->buf_tail = 0; |
1026 | ||
1ec1e82f SH |
1027 | dev_dbg(sdma->dev, "setting up %d entries for channel %d.\n", |
1028 | sg_len, channel); | |
1029 | ||
1030 | sdmac->direction = direction; | |
1031 | ret = sdma_load_context(sdmac); | |
1032 | if (ret) | |
1033 | goto err_out; | |
1034 | ||
1035 | if (sg_len > NUM_BD) { | |
1036 | dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n", | |
1037 | channel, sg_len, NUM_BD); | |
1038 | ret = -EINVAL; | |
1039 | goto err_out; | |
1040 | } | |
1041 | ||
ab59a510 | 1042 | sdmac->chn_count = 0; |
1ec1e82f SH |
1043 | for_each_sg(sgl, sg, sg_len, i) { |
1044 | struct sdma_buffer_descriptor *bd = &sdmac->bd[i]; | |
1045 | int param; | |
1046 | ||
d2f5c276 | 1047 | bd->buffer_addr = sg->dma_address; |
1ec1e82f | 1048 | |
fdaf9c4b | 1049 | count = sg_dma_len(sg); |
1ec1e82f SH |
1050 | |
1051 | if (count > 0xffff) { | |
1052 | dev_err(sdma->dev, "SDMA channel %d: maximum bytes for sg entry exceeded: %d > %d\n", | |
1053 | channel, count, 0xffff); | |
1054 | ret = -EINVAL; | |
1055 | goto err_out; | |
1056 | } | |
1057 | ||
1058 | bd->mode.count = count; | |
ab59a510 | 1059 | sdmac->chn_count += count; |
1ec1e82f SH |
1060 | |
1061 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) { | |
1062 | ret = -EINVAL; | |
1063 | goto err_out; | |
1064 | } | |
1fa81c27 SH |
1065 | |
1066 | switch (sdmac->word_size) { | |
1067 | case DMA_SLAVE_BUSWIDTH_4_BYTES: | |
1ec1e82f | 1068 | bd->mode.command = 0; |
1fa81c27 SH |
1069 | if (count & 3 || sg->dma_address & 3) |
1070 | return NULL; | |
1071 | break; | |
1072 | case DMA_SLAVE_BUSWIDTH_2_BYTES: | |
1073 | bd->mode.command = 2; | |
1074 | if (count & 1 || sg->dma_address & 1) | |
1075 | return NULL; | |
1076 | break; | |
1077 | case DMA_SLAVE_BUSWIDTH_1_BYTE: | |
1078 | bd->mode.command = 1; | |
1079 | break; | |
1080 | default: | |
1081 | return NULL; | |
1082 | } | |
1ec1e82f SH |
1083 | |
1084 | param = BD_DONE | BD_EXTD | BD_CONT; | |
1085 | ||
341b9419 | 1086 | if (i + 1 == sg_len) { |
1ec1e82f | 1087 | param |= BD_INTR; |
341b9419 SG |
1088 | param |= BD_LAST; |
1089 | param &= ~BD_CONT; | |
1ec1e82f SH |
1090 | } |
1091 | ||
c3cc74b2 OJ |
1092 | dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n", |
1093 | i, count, (u64)sg->dma_address, | |
1ec1e82f SH |
1094 | param & BD_WRAP ? "wrap" : "", |
1095 | param & BD_INTR ? " intr" : ""); | |
1096 | ||
1097 | bd->mode.status = param; | |
1098 | } | |
1099 | ||
1100 | sdmac->num_bd = sg_len; | |
1101 | sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys; | |
1102 | ||
1103 | return &sdmac->desc; | |
1104 | err_out: | |
4b2ce9dd | 1105 | sdmac->status = DMA_ERROR; |
1ec1e82f SH |
1106 | return NULL; |
1107 | } | |
1108 | ||
1109 | static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic( | |
1110 | struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, | |
185ecb5f | 1111 | size_t period_len, enum dma_transfer_direction direction, |
ec8b5e48 | 1112 | unsigned long flags, void *context) |
1ec1e82f SH |
1113 | { |
1114 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1115 | struct sdma_engine *sdma = sdmac->sdma; | |
1116 | int num_periods = buf_len / period_len; | |
23889c63 | 1117 | int channel = sdmac->channel; |
1ec1e82f SH |
1118 | int ret, i = 0, buf = 0; |
1119 | ||
1120 | dev_dbg(sdma->dev, "%s channel: %d\n", __func__, channel); | |
1121 | ||
1122 | if (sdmac->status == DMA_IN_PROGRESS) | |
1123 | return NULL; | |
1124 | ||
1125 | sdmac->status = DMA_IN_PROGRESS; | |
1126 | ||
8e2e27c7 RZ |
1127 | sdmac->buf_tail = 0; |
1128 | ||
1ec1e82f SH |
1129 | sdmac->flags |= IMX_DMA_SG_LOOP; |
1130 | sdmac->direction = direction; | |
1131 | ret = sdma_load_context(sdmac); | |
1132 | if (ret) | |
1133 | goto err_out; | |
1134 | ||
1135 | if (num_periods > NUM_BD) { | |
1136 | dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n", | |
1137 | channel, num_periods, NUM_BD); | |
1138 | goto err_out; | |
1139 | } | |
1140 | ||
1141 | if (period_len > 0xffff) { | |
1142 | dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %d > %d\n", | |
1143 | channel, period_len, 0xffff); | |
1144 | goto err_out; | |
1145 | } | |
1146 | ||
1147 | while (buf < buf_len) { | |
1148 | struct sdma_buffer_descriptor *bd = &sdmac->bd[i]; | |
1149 | int param; | |
1150 | ||
1151 | bd->buffer_addr = dma_addr; | |
1152 | ||
1153 | bd->mode.count = period_len; | |
1154 | ||
1155 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) | |
1156 | goto err_out; | |
1157 | if (sdmac->word_size == DMA_SLAVE_BUSWIDTH_4_BYTES) | |
1158 | bd->mode.command = 0; | |
1159 | else | |
1160 | bd->mode.command = sdmac->word_size; | |
1161 | ||
1162 | param = BD_DONE | BD_EXTD | BD_CONT | BD_INTR; | |
1163 | if (i + 1 == num_periods) | |
1164 | param |= BD_WRAP; | |
1165 | ||
c3cc74b2 OJ |
1166 | dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n", |
1167 | i, period_len, (u64)dma_addr, | |
1ec1e82f SH |
1168 | param & BD_WRAP ? "wrap" : "", |
1169 | param & BD_INTR ? " intr" : ""); | |
1170 | ||
1171 | bd->mode.status = param; | |
1172 | ||
1173 | dma_addr += period_len; | |
1174 | buf += period_len; | |
1175 | ||
1176 | i++; | |
1177 | } | |
1178 | ||
1179 | sdmac->num_bd = num_periods; | |
1180 | sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys; | |
1181 | ||
1182 | return &sdmac->desc; | |
1183 | err_out: | |
1184 | sdmac->status = DMA_ERROR; | |
1185 | return NULL; | |
1186 | } | |
1187 | ||
1188 | static int sdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, | |
1189 | unsigned long arg) | |
1190 | { | |
1191 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1192 | struct dma_slave_config *dmaengine_cfg = (void *)arg; | |
1193 | ||
1194 | switch (cmd) { | |
1195 | case DMA_TERMINATE_ALL: | |
1196 | sdma_disable_channel(sdmac); | |
1197 | return 0; | |
1198 | case DMA_SLAVE_CONFIG: | |
db8196df | 1199 | if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) { |
1ec1e82f | 1200 | sdmac->per_address = dmaengine_cfg->src_addr; |
94ac27a5 PR |
1201 | sdmac->watermark_level = dmaengine_cfg->src_maxburst * |
1202 | dmaengine_cfg->src_addr_width; | |
1ec1e82f SH |
1203 | sdmac->word_size = dmaengine_cfg->src_addr_width; |
1204 | } else { | |
1205 | sdmac->per_address = dmaengine_cfg->dst_addr; | |
94ac27a5 PR |
1206 | sdmac->watermark_level = dmaengine_cfg->dst_maxburst * |
1207 | dmaengine_cfg->dst_addr_width; | |
1ec1e82f SH |
1208 | sdmac->word_size = dmaengine_cfg->dst_addr_width; |
1209 | } | |
e6966433 | 1210 | sdmac->direction = dmaengine_cfg->direction; |
1ec1e82f SH |
1211 | return sdma_config_channel(sdmac); |
1212 | default: | |
1213 | return -ENOSYS; | |
1214 | } | |
1215 | ||
1216 | return -EINVAL; | |
1217 | } | |
1218 | ||
1219 | static enum dma_status sdma_tx_status(struct dma_chan *chan, | |
e8e3a790 AS |
1220 | dma_cookie_t cookie, |
1221 | struct dma_tx_state *txstate) | |
1ec1e82f SH |
1222 | { |
1223 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1ec1e82f | 1224 | |
e8e3a790 | 1225 | dma_set_tx_state(txstate, chan->completed_cookie, chan->cookie, |
ab59a510 | 1226 | sdmac->chn_count - sdmac->chn_real_count); |
1ec1e82f | 1227 | |
8a965911 | 1228 | return sdmac->status; |
1ec1e82f SH |
1229 | } |
1230 | ||
1231 | static void sdma_issue_pending(struct dma_chan *chan) | |
1232 | { | |
2b4f130e SH |
1233 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1234 | struct sdma_engine *sdma = sdmac->sdma; | |
1235 | ||
1236 | if (sdmac->status == DMA_IN_PROGRESS) | |
1237 | sdma_enable_channel(sdma, sdmac->channel); | |
1ec1e82f SH |
1238 | } |
1239 | ||
5b28aa31 SH |
1240 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34 |
1241 | ||
1242 | static void sdma_add_scripts(struct sdma_engine *sdma, | |
1243 | const struct sdma_script_start_addrs *addr) | |
1244 | { | |
1245 | s32 *addr_arr = (u32 *)addr; | |
1246 | s32 *saddr_arr = (u32 *)sdma->script_addrs; | |
1247 | int i; | |
1248 | ||
1249 | for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++) | |
1250 | if (addr_arr[i] > 0) | |
1251 | saddr_arr[i] = addr_arr[i]; | |
1252 | } | |
1253 | ||
7b4b88e0 | 1254 | static void sdma_load_firmware(const struct firmware *fw, void *context) |
5b28aa31 | 1255 | { |
7b4b88e0 | 1256 | struct sdma_engine *sdma = context; |
5b28aa31 | 1257 | const struct sdma_firmware_header *header; |
5b28aa31 SH |
1258 | const struct sdma_script_start_addrs *addr; |
1259 | unsigned short *ram_code; | |
1260 | ||
7b4b88e0 SH |
1261 | if (!fw) { |
1262 | dev_err(sdma->dev, "firmware not found\n"); | |
1263 | return; | |
1264 | } | |
5b28aa31 SH |
1265 | |
1266 | if (fw->size < sizeof(*header)) | |
1267 | goto err_firmware; | |
1268 | ||
1269 | header = (struct sdma_firmware_header *)fw->data; | |
1270 | ||
1271 | if (header->magic != SDMA_FIRMWARE_MAGIC) | |
1272 | goto err_firmware; | |
1273 | if (header->ram_code_start + header->ram_code_size > fw->size) | |
1274 | goto err_firmware; | |
1275 | ||
1276 | addr = (void *)header + header->script_addrs_start; | |
1277 | ram_code = (void *)header + header->ram_code_start; | |
1278 | ||
7560e3f3 SH |
1279 | clk_enable(sdma->clk_ipg); |
1280 | clk_enable(sdma->clk_ahb); | |
5b28aa31 SH |
1281 | /* download the RAM image for SDMA */ |
1282 | sdma_load_script(sdma, ram_code, | |
1283 | header->ram_code_size, | |
6866fd3b | 1284 | addr->ram_code_start_addr); |
7560e3f3 SH |
1285 | clk_disable(sdma->clk_ipg); |
1286 | clk_disable(sdma->clk_ahb); | |
5b28aa31 SH |
1287 | |
1288 | sdma_add_scripts(sdma, addr); | |
1289 | ||
1290 | dev_info(sdma->dev, "loaded firmware %d.%d\n", | |
1291 | header->version_major, | |
1292 | header->version_minor); | |
1293 | ||
1294 | err_firmware: | |
1295 | release_firmware(fw); | |
7b4b88e0 SH |
1296 | } |
1297 | ||
1298 | static int __init sdma_get_firmware(struct sdma_engine *sdma, | |
1299 | const char *fw_name) | |
1300 | { | |
1301 | int ret; | |
1302 | ||
1303 | ret = request_firmware_nowait(THIS_MODULE, | |
1304 | FW_ACTION_HOTPLUG, fw_name, sdma->dev, | |
1305 | GFP_KERNEL, sdma, sdma_load_firmware); | |
5b28aa31 SH |
1306 | |
1307 | return ret; | |
1308 | } | |
1309 | ||
1310 | static int __init sdma_init(struct sdma_engine *sdma) | |
1ec1e82f SH |
1311 | { |
1312 | int i, ret; | |
1313 | dma_addr_t ccb_phys; | |
1314 | ||
7560e3f3 SH |
1315 | clk_enable(sdma->clk_ipg); |
1316 | clk_enable(sdma->clk_ahb); | |
1ec1e82f SH |
1317 | |
1318 | /* Be sure SDMA has not started yet */ | |
c4b56857 | 1319 | writel_relaxed(0, sdma->regs + SDMA_H_C0PTR); |
1ec1e82f SH |
1320 | |
1321 | sdma->channel_control = dma_alloc_coherent(NULL, | |
1322 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control) + | |
1323 | sizeof(struct sdma_context_data), | |
1324 | &ccb_phys, GFP_KERNEL); | |
1325 | ||
1326 | if (!sdma->channel_control) { | |
1327 | ret = -ENOMEM; | |
1328 | goto err_dma_alloc; | |
1329 | } | |
1330 | ||
1331 | sdma->context = (void *)sdma->channel_control + | |
1332 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control); | |
1333 | sdma->context_phys = ccb_phys + | |
1334 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control); | |
1335 | ||
1336 | /* Zero-out the CCB structures array just allocated */ | |
1337 | memset(sdma->channel_control, 0, | |
1338 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control)); | |
1339 | ||
1340 | /* disable all channels */ | |
17bba72f | 1341 | for (i = 0; i < sdma->drvdata->num_events; i++) |
c4b56857 | 1342 | writel_relaxed(0, sdma->regs + chnenbl_ofs(sdma, i)); |
1ec1e82f SH |
1343 | |
1344 | /* All channels have priority 0 */ | |
1345 | for (i = 0; i < MAX_DMA_CHANNELS; i++) | |
c4b56857 | 1346 | writel_relaxed(0, sdma->regs + SDMA_CHNPRI_0 + i * 4); |
1ec1e82f SH |
1347 | |
1348 | ret = sdma_request_channel(&sdma->channel[0]); | |
1349 | if (ret) | |
1350 | goto err_dma_alloc; | |
1351 | ||
1352 | sdma_config_ownership(&sdma->channel[0], false, true, false); | |
1353 | ||
1354 | /* Set Command Channel (Channel Zero) */ | |
c4b56857 | 1355 | writel_relaxed(0x4050, sdma->regs + SDMA_CHN0ADDR); |
1ec1e82f SH |
1356 | |
1357 | /* Set bits of CONFIG register but with static context switching */ | |
1358 | /* FIXME: Check whether to set ACR bit depending on clock ratios */ | |
c4b56857 | 1359 | writel_relaxed(0, sdma->regs + SDMA_H_CONFIG); |
1ec1e82f | 1360 | |
c4b56857 | 1361 | writel_relaxed(ccb_phys, sdma->regs + SDMA_H_C0PTR); |
1ec1e82f | 1362 | |
1ec1e82f | 1363 | /* Set bits of CONFIG register with given context switching mode */ |
c4b56857 | 1364 | writel_relaxed(SDMA_H_CONFIG_CSM, sdma->regs + SDMA_H_CONFIG); |
1ec1e82f SH |
1365 | |
1366 | /* Initializes channel's priorities */ | |
1367 | sdma_set_channel_priority(&sdma->channel[0], 7); | |
1368 | ||
7560e3f3 SH |
1369 | clk_disable(sdma->clk_ipg); |
1370 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1371 | |
1372 | return 0; | |
1373 | ||
1374 | err_dma_alloc: | |
7560e3f3 SH |
1375 | clk_disable(sdma->clk_ipg); |
1376 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1377 | dev_err(sdma->dev, "initialisation failed with %d\n", ret); |
1378 | return ret; | |
1379 | } | |
1380 | ||
9479e17c SG |
1381 | static bool sdma_filter_fn(struct dma_chan *chan, void *fn_param) |
1382 | { | |
1383 | struct imx_dma_data *data = fn_param; | |
1384 | ||
1385 | if (!imx_dma_is_general_purpose(chan)) | |
1386 | return false; | |
1387 | ||
1388 | chan->private = data; | |
1389 | ||
1390 | return true; | |
1391 | } | |
1392 | ||
1393 | static struct dma_chan *sdma_xlate(struct of_phandle_args *dma_spec, | |
1394 | struct of_dma *ofdma) | |
1395 | { | |
1396 | struct sdma_engine *sdma = ofdma->of_dma_data; | |
1397 | dma_cap_mask_t mask = sdma->dma_device.cap_mask; | |
1398 | struct imx_dma_data data; | |
1399 | ||
1400 | if (dma_spec->args_count != 3) | |
1401 | return NULL; | |
1402 | ||
1403 | data.dma_request = dma_spec->args[0]; | |
1404 | data.peripheral_type = dma_spec->args[1]; | |
1405 | data.priority = dma_spec->args[2]; | |
1406 | ||
1407 | return dma_request_channel(mask, sdma_filter_fn, &data); | |
1408 | } | |
1409 | ||
1ec1e82f SH |
1410 | static int __init sdma_probe(struct platform_device *pdev) |
1411 | { | |
580975d7 SG |
1412 | const struct of_device_id *of_id = |
1413 | of_match_device(sdma_dt_ids, &pdev->dev); | |
1414 | struct device_node *np = pdev->dev.of_node; | |
1415 | const char *fw_name; | |
1ec1e82f | 1416 | int ret; |
1ec1e82f | 1417 | int irq; |
1ec1e82f | 1418 | struct resource *iores; |
d4adcc01 | 1419 | struct sdma_platform_data *pdata = dev_get_platdata(&pdev->dev); |
1ec1e82f | 1420 | int i; |
1ec1e82f | 1421 | struct sdma_engine *sdma; |
36e2f21a | 1422 | s32 *saddr_arr; |
17bba72f SH |
1423 | const struct sdma_driver_data *drvdata = NULL; |
1424 | ||
1425 | if (of_id) | |
1426 | drvdata = of_id->data; | |
1427 | else if (pdev->id_entry) | |
1428 | drvdata = (void *)pdev->id_entry->driver_data; | |
1429 | ||
1430 | if (!drvdata) { | |
1431 | dev_err(&pdev->dev, "unable to find driver data\n"); | |
1432 | return -EINVAL; | |
1433 | } | |
1ec1e82f | 1434 | |
42536b9f PR |
1435 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
1436 | if (ret) | |
1437 | return ret; | |
1438 | ||
1ec1e82f SH |
1439 | sdma = kzalloc(sizeof(*sdma), GFP_KERNEL); |
1440 | if (!sdma) | |
1441 | return -ENOMEM; | |
1442 | ||
2ccaef05 | 1443 | spin_lock_init(&sdma->channel_0_lock); |
73eab978 | 1444 | |
1ec1e82f | 1445 | sdma->dev = &pdev->dev; |
17bba72f | 1446 | sdma->drvdata = drvdata; |
1ec1e82f SH |
1447 | |
1448 | iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1449 | irq = platform_get_irq(pdev, 0); | |
580975d7 | 1450 | if (!iores || irq < 0) { |
1ec1e82f SH |
1451 | ret = -EINVAL; |
1452 | goto err_irq; | |
1453 | } | |
1454 | ||
1455 | if (!request_mem_region(iores->start, resource_size(iores), pdev->name)) { | |
1456 | ret = -EBUSY; | |
1457 | goto err_request_region; | |
1458 | } | |
1459 | ||
7560e3f3 SH |
1460 | sdma->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); |
1461 | if (IS_ERR(sdma->clk_ipg)) { | |
1462 | ret = PTR_ERR(sdma->clk_ipg); | |
1ec1e82f SH |
1463 | goto err_clk; |
1464 | } | |
1465 | ||
7560e3f3 SH |
1466 | sdma->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); |
1467 | if (IS_ERR(sdma->clk_ahb)) { | |
1468 | ret = PTR_ERR(sdma->clk_ahb); | |
1469 | goto err_clk; | |
1470 | } | |
1471 | ||
1472 | clk_prepare(sdma->clk_ipg); | |
1473 | clk_prepare(sdma->clk_ahb); | |
1474 | ||
1ec1e82f SH |
1475 | sdma->regs = ioremap(iores->start, resource_size(iores)); |
1476 | if (!sdma->regs) { | |
1477 | ret = -ENOMEM; | |
1478 | goto err_ioremap; | |
1479 | } | |
1480 | ||
1481 | ret = request_irq(irq, sdma_int_handler, 0, "sdma", sdma); | |
1482 | if (ret) | |
1483 | goto err_request_irq; | |
1484 | ||
5b28aa31 | 1485 | sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL); |
1c1d9547 AL |
1486 | if (!sdma->script_addrs) { |
1487 | ret = -ENOMEM; | |
5b28aa31 | 1488 | goto err_alloc; |
1c1d9547 | 1489 | } |
1ec1e82f | 1490 | |
36e2f21a SH |
1491 | /* initially no scripts available */ |
1492 | saddr_arr = (s32 *)sdma->script_addrs; | |
1493 | for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++) | |
1494 | saddr_arr[i] = -EINVAL; | |
1495 | ||
7214a8b1 SH |
1496 | dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask); |
1497 | dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask); | |
1498 | ||
1ec1e82f SH |
1499 | INIT_LIST_HEAD(&sdma->dma_device.channels); |
1500 | /* Initialize channel parameters */ | |
1501 | for (i = 0; i < MAX_DMA_CHANNELS; i++) { | |
1502 | struct sdma_channel *sdmac = &sdma->channel[i]; | |
1503 | ||
1504 | sdmac->sdma = sdma; | |
1505 | spin_lock_init(&sdmac->lock); | |
1506 | ||
1ec1e82f | 1507 | sdmac->chan.device = &sdma->dma_device; |
8ac69546 | 1508 | dma_cookie_init(&sdmac->chan); |
1ec1e82f SH |
1509 | sdmac->channel = i; |
1510 | ||
abd9ccc8 HS |
1511 | tasklet_init(&sdmac->tasklet, sdma_tasklet, |
1512 | (unsigned long) sdmac); | |
23889c63 SH |
1513 | /* |
1514 | * Add the channel to the DMAC list. Do not add channel 0 though | |
1515 | * because we need it internally in the SDMA driver. This also means | |
1516 | * that channel 0 in dmaengine counting matches sdma channel 1. | |
1517 | */ | |
1518 | if (i) | |
1519 | list_add_tail(&sdmac->chan.device_node, | |
1520 | &sdma->dma_device.channels); | |
1ec1e82f SH |
1521 | } |
1522 | ||
5b28aa31 | 1523 | ret = sdma_init(sdma); |
1ec1e82f SH |
1524 | if (ret) |
1525 | goto err_init; | |
1526 | ||
dcfec3c0 SH |
1527 | if (sdma->drvdata->script_addrs) |
1528 | sdma_add_scripts(sdma, sdma->drvdata->script_addrs); | |
580975d7 | 1529 | if (pdata && pdata->script_addrs) |
5b28aa31 SH |
1530 | sdma_add_scripts(sdma, pdata->script_addrs); |
1531 | ||
580975d7 | 1532 | if (pdata) { |
6d0d7e2d FE |
1533 | ret = sdma_get_firmware(sdma, pdata->fw_name); |
1534 | if (ret) | |
ad1122e5 | 1535 | dev_warn(&pdev->dev, "failed to get firmware from platform data\n"); |
580975d7 SG |
1536 | } else { |
1537 | /* | |
1538 | * Because that device tree does not encode ROM script address, | |
1539 | * the RAM script in firmware is mandatory for device tree | |
1540 | * probe, otherwise it fails. | |
1541 | */ | |
1542 | ret = of_property_read_string(np, "fsl,sdma-ram-script-name", | |
1543 | &fw_name); | |
6602b0dd | 1544 | if (ret) |
ad1122e5 | 1545 | dev_warn(&pdev->dev, "failed to get firmware name\n"); |
6602b0dd FE |
1546 | else { |
1547 | ret = sdma_get_firmware(sdma, fw_name); | |
1548 | if (ret) | |
ad1122e5 | 1549 | dev_warn(&pdev->dev, "failed to get firmware from device tree\n"); |
580975d7 SG |
1550 | } |
1551 | } | |
5b28aa31 | 1552 | |
1ec1e82f SH |
1553 | sdma->dma_device.dev = &pdev->dev; |
1554 | ||
1555 | sdma->dma_device.device_alloc_chan_resources = sdma_alloc_chan_resources; | |
1556 | sdma->dma_device.device_free_chan_resources = sdma_free_chan_resources; | |
1557 | sdma->dma_device.device_tx_status = sdma_tx_status; | |
1558 | sdma->dma_device.device_prep_slave_sg = sdma_prep_slave_sg; | |
1559 | sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic; | |
1560 | sdma->dma_device.device_control = sdma_control; | |
1561 | sdma->dma_device.device_issue_pending = sdma_issue_pending; | |
b9b3f82f SH |
1562 | sdma->dma_device.dev->dma_parms = &sdma->dma_parms; |
1563 | dma_set_max_seg_size(sdma->dma_device.dev, 65535); | |
1ec1e82f SH |
1564 | |
1565 | ret = dma_async_device_register(&sdma->dma_device); | |
1566 | if (ret) { | |
1567 | dev_err(&pdev->dev, "unable to register\n"); | |
1568 | goto err_init; | |
1569 | } | |
1570 | ||
9479e17c SG |
1571 | if (np) { |
1572 | ret = of_dma_controller_register(np, sdma_xlate, sdma); | |
1573 | if (ret) { | |
1574 | dev_err(&pdev->dev, "failed to register controller\n"); | |
1575 | goto err_register; | |
1576 | } | |
1577 | } | |
1578 | ||
5b28aa31 | 1579 | dev_info(sdma->dev, "initialized\n"); |
1ec1e82f SH |
1580 | |
1581 | return 0; | |
1582 | ||
9479e17c SG |
1583 | err_register: |
1584 | dma_async_device_unregister(&sdma->dma_device); | |
1ec1e82f SH |
1585 | err_init: |
1586 | kfree(sdma->script_addrs); | |
5b28aa31 | 1587 | err_alloc: |
1ec1e82f SH |
1588 | free_irq(irq, sdma); |
1589 | err_request_irq: | |
1590 | iounmap(sdma->regs); | |
1591 | err_ioremap: | |
1ec1e82f SH |
1592 | err_clk: |
1593 | release_mem_region(iores->start, resource_size(iores)); | |
1594 | err_request_region: | |
1595 | err_irq: | |
1596 | kfree(sdma); | |
939fd4f0 | 1597 | return ret; |
1ec1e82f SH |
1598 | } |
1599 | ||
1d1bbd30 | 1600 | static int sdma_remove(struct platform_device *pdev) |
1ec1e82f SH |
1601 | { |
1602 | return -EBUSY; | |
1603 | } | |
1604 | ||
1605 | static struct platform_driver sdma_driver = { | |
1606 | .driver = { | |
1607 | .name = "imx-sdma", | |
580975d7 | 1608 | .of_match_table = sdma_dt_ids, |
1ec1e82f | 1609 | }, |
62550cd7 | 1610 | .id_table = sdma_devtypes, |
1d1bbd30 | 1611 | .remove = sdma_remove, |
1ec1e82f SH |
1612 | }; |
1613 | ||
1614 | static int __init sdma_module_init(void) | |
1615 | { | |
1616 | return platform_driver_probe(&sdma_driver, sdma_probe); | |
1617 | } | |
c989a7fc | 1618 | module_init(sdma_module_init); |
1ec1e82f SH |
1619 | |
1620 | MODULE_AUTHOR("Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>"); | |
1621 | MODULE_DESCRIPTION("i.MX SDMA driver"); | |
1622 | MODULE_LICENSE("GPL"); |