Commit | Line | Data |
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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 | 37 | #include <linux/of.h> |
8391ecf4 | 38 | #include <linux/of_address.h> |
580975d7 | 39 | #include <linux/of_device.h> |
9479e17c | 40 | #include <linux/of_dma.h> |
1ec1e82f SH |
41 | |
42 | #include <asm/irq.h> | |
82906b13 AB |
43 | #include <linux/platform_data/dma-imx-sdma.h> |
44 | #include <linux/platform_data/dma-imx.h> | |
d078cd1b ZW |
45 | #include <linux/regmap.h> |
46 | #include <linux/mfd/syscon.h> | |
47 | #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> | |
1ec1e82f | 48 | |
d2ebfb33 RKAL |
49 | #include "dmaengine.h" |
50 | ||
1ec1e82f SH |
51 | /* SDMA registers */ |
52 | #define SDMA_H_C0PTR 0x000 | |
53 | #define SDMA_H_INTR 0x004 | |
54 | #define SDMA_H_STATSTOP 0x008 | |
55 | #define SDMA_H_START 0x00c | |
56 | #define SDMA_H_EVTOVR 0x010 | |
57 | #define SDMA_H_DSPOVR 0x014 | |
58 | #define SDMA_H_HOSTOVR 0x018 | |
59 | #define SDMA_H_EVTPEND 0x01c | |
60 | #define SDMA_H_DSPENBL 0x020 | |
61 | #define SDMA_H_RESET 0x024 | |
62 | #define SDMA_H_EVTERR 0x028 | |
63 | #define SDMA_H_INTRMSK 0x02c | |
64 | #define SDMA_H_PSW 0x030 | |
65 | #define SDMA_H_EVTERRDBG 0x034 | |
66 | #define SDMA_H_CONFIG 0x038 | |
67 | #define SDMA_ONCE_ENB 0x040 | |
68 | #define SDMA_ONCE_DATA 0x044 | |
69 | #define SDMA_ONCE_INSTR 0x048 | |
70 | #define SDMA_ONCE_STAT 0x04c | |
71 | #define SDMA_ONCE_CMD 0x050 | |
72 | #define SDMA_EVT_MIRROR 0x054 | |
73 | #define SDMA_ILLINSTADDR 0x058 | |
74 | #define SDMA_CHN0ADDR 0x05c | |
75 | #define SDMA_ONCE_RTB 0x060 | |
76 | #define SDMA_XTRIG_CONF1 0x070 | |
77 | #define SDMA_XTRIG_CONF2 0x074 | |
62550cd7 SG |
78 | #define SDMA_CHNENBL0_IMX35 0x200 |
79 | #define SDMA_CHNENBL0_IMX31 0x080 | |
1ec1e82f SH |
80 | #define SDMA_CHNPRI_0 0x100 |
81 | ||
82 | /* | |
83 | * Buffer descriptor status values. | |
84 | */ | |
85 | #define BD_DONE 0x01 | |
86 | #define BD_WRAP 0x02 | |
87 | #define BD_CONT 0x04 | |
88 | #define BD_INTR 0x08 | |
89 | #define BD_RROR 0x10 | |
90 | #define BD_LAST 0x20 | |
91 | #define BD_EXTD 0x80 | |
92 | ||
93 | /* | |
94 | * Data Node descriptor status values. | |
95 | */ | |
96 | #define DND_END_OF_FRAME 0x80 | |
97 | #define DND_END_OF_XFER 0x40 | |
98 | #define DND_DONE 0x20 | |
99 | #define DND_UNUSED 0x01 | |
100 | ||
101 | /* | |
102 | * IPCV2 descriptor status values. | |
103 | */ | |
104 | #define BD_IPCV2_END_OF_FRAME 0x40 | |
105 | ||
106 | #define IPCV2_MAX_NODES 50 | |
107 | /* | |
108 | * Error bit set in the CCB status field by the SDMA, | |
109 | * in setbd routine, in case of a transfer error | |
110 | */ | |
111 | #define DATA_ERROR 0x10000000 | |
112 | ||
113 | /* | |
114 | * Buffer descriptor commands. | |
115 | */ | |
116 | #define C0_ADDR 0x01 | |
117 | #define C0_LOAD 0x02 | |
118 | #define C0_DUMP 0x03 | |
119 | #define C0_SETCTX 0x07 | |
120 | #define C0_GETCTX 0x03 | |
121 | #define C0_SETDM 0x01 | |
122 | #define C0_SETPM 0x04 | |
123 | #define C0_GETDM 0x02 | |
124 | #define C0_GETPM 0x08 | |
125 | /* | |
126 | * Change endianness indicator in the BD command field | |
127 | */ | |
128 | #define CHANGE_ENDIANNESS 0x80 | |
129 | ||
8391ecf4 SW |
130 | /* |
131 | * p_2_p watermark_level description | |
132 | * Bits Name Description | |
133 | * 0-7 Lower WML Lower watermark level | |
134 | * 8 PS 1: Pad Swallowing | |
135 | * 0: No Pad Swallowing | |
136 | * 9 PA 1: Pad Adding | |
137 | * 0: No Pad Adding | |
138 | * 10 SPDIF If this bit is set both source | |
139 | * and destination are on SPBA | |
140 | * 11 Source Bit(SP) 1: Source on SPBA | |
141 | * 0: Source on AIPS | |
142 | * 12 Destination Bit(DP) 1: Destination on SPBA | |
143 | * 0: Destination on AIPS | |
144 | * 13-15 --------- MUST BE 0 | |
145 | * 16-23 Higher WML HWML | |
146 | * 24-27 N Total number of samples after | |
147 | * which Pad adding/Swallowing | |
148 | * must be done. It must be odd. | |
149 | * 28 Lower WML Event(LWE) SDMA events reg to check for | |
150 | * LWML event mask | |
151 | * 0: LWE in EVENTS register | |
152 | * 1: LWE in EVENTS2 register | |
153 | * 29 Higher WML Event(HWE) SDMA events reg to check for | |
154 | * HWML event mask | |
155 | * 0: HWE in EVENTS register | |
156 | * 1: HWE in EVENTS2 register | |
157 | * 30 --------- MUST BE 0 | |
158 | * 31 CONT 1: Amount of samples to be | |
159 | * transferred is unknown and | |
160 | * script will keep on | |
161 | * transferring samples as long as | |
162 | * both events are detected and | |
163 | * script must be manually stopped | |
164 | * by the application | |
165 | * 0: The amount of samples to be | |
166 | * transferred is equal to the | |
167 | * count field of mode word | |
168 | */ | |
169 | #define SDMA_WATERMARK_LEVEL_LWML 0xFF | |
170 | #define SDMA_WATERMARK_LEVEL_PS BIT(8) | |
171 | #define SDMA_WATERMARK_LEVEL_PA BIT(9) | |
172 | #define SDMA_WATERMARK_LEVEL_SPDIF BIT(10) | |
173 | #define SDMA_WATERMARK_LEVEL_SP BIT(11) | |
174 | #define SDMA_WATERMARK_LEVEL_DP BIT(12) | |
175 | #define SDMA_WATERMARK_LEVEL_HWML (0xFF << 16) | |
176 | #define SDMA_WATERMARK_LEVEL_LWE BIT(28) | |
177 | #define SDMA_WATERMARK_LEVEL_HWE BIT(29) | |
178 | #define SDMA_WATERMARK_LEVEL_CONT BIT(31) | |
179 | ||
1ec1e82f SH |
180 | /* |
181 | * Mode/Count of data node descriptors - IPCv2 | |
182 | */ | |
183 | struct sdma_mode_count { | |
184 | u32 count : 16; /* size of the buffer pointed by this BD */ | |
185 | u32 status : 8; /* E,R,I,C,W,D status bits stored here */ | |
186 | u32 command : 8; /* command mostlky used for channel 0 */ | |
187 | }; | |
188 | ||
189 | /* | |
190 | * Buffer descriptor | |
191 | */ | |
192 | struct sdma_buffer_descriptor { | |
193 | struct sdma_mode_count mode; | |
194 | u32 buffer_addr; /* address of the buffer described */ | |
195 | u32 ext_buffer_addr; /* extended buffer address */ | |
196 | } __attribute__ ((packed)); | |
197 | ||
198 | /** | |
199 | * struct sdma_channel_control - Channel control Block | |
200 | * | |
201 | * @current_bd_ptr current buffer descriptor processed | |
202 | * @base_bd_ptr first element of buffer descriptor array | |
203 | * @unused padding. The SDMA engine expects an array of 128 byte | |
204 | * control blocks | |
205 | */ | |
206 | struct sdma_channel_control { | |
207 | u32 current_bd_ptr; | |
208 | u32 base_bd_ptr; | |
209 | u32 unused[2]; | |
210 | } __attribute__ ((packed)); | |
211 | ||
212 | /** | |
213 | * struct sdma_state_registers - SDMA context for a channel | |
214 | * | |
215 | * @pc: program counter | |
216 | * @t: test bit: status of arithmetic & test instruction | |
217 | * @rpc: return program counter | |
218 | * @sf: source fault while loading data | |
219 | * @spc: loop start program counter | |
220 | * @df: destination fault while storing data | |
221 | * @epc: loop end program counter | |
222 | * @lm: loop mode | |
223 | */ | |
224 | struct sdma_state_registers { | |
225 | u32 pc :14; | |
226 | u32 unused1: 1; | |
227 | u32 t : 1; | |
228 | u32 rpc :14; | |
229 | u32 unused0: 1; | |
230 | u32 sf : 1; | |
231 | u32 spc :14; | |
232 | u32 unused2: 1; | |
233 | u32 df : 1; | |
234 | u32 epc :14; | |
235 | u32 lm : 2; | |
236 | } __attribute__ ((packed)); | |
237 | ||
238 | /** | |
239 | * struct sdma_context_data - sdma context specific to a channel | |
240 | * | |
241 | * @channel_state: channel state bits | |
242 | * @gReg: general registers | |
243 | * @mda: burst dma destination address register | |
244 | * @msa: burst dma source address register | |
245 | * @ms: burst dma status register | |
246 | * @md: burst dma data register | |
247 | * @pda: peripheral dma destination address register | |
248 | * @psa: peripheral dma source address register | |
249 | * @ps: peripheral dma status register | |
250 | * @pd: peripheral dma data register | |
251 | * @ca: CRC polynomial register | |
252 | * @cs: CRC accumulator register | |
253 | * @dda: dedicated core destination address register | |
254 | * @dsa: dedicated core source address register | |
255 | * @ds: dedicated core status register | |
256 | * @dd: dedicated core data register | |
257 | */ | |
258 | struct sdma_context_data { | |
259 | struct sdma_state_registers channel_state; | |
260 | u32 gReg[8]; | |
261 | u32 mda; | |
262 | u32 msa; | |
263 | u32 ms; | |
264 | u32 md; | |
265 | u32 pda; | |
266 | u32 psa; | |
267 | u32 ps; | |
268 | u32 pd; | |
269 | u32 ca; | |
270 | u32 cs; | |
271 | u32 dda; | |
272 | u32 dsa; | |
273 | u32 ds; | |
274 | u32 dd; | |
275 | u32 scratch0; | |
276 | u32 scratch1; | |
277 | u32 scratch2; | |
278 | u32 scratch3; | |
279 | u32 scratch4; | |
280 | u32 scratch5; | |
281 | u32 scratch6; | |
282 | u32 scratch7; | |
283 | } __attribute__ ((packed)); | |
284 | ||
285 | #define NUM_BD (int)(PAGE_SIZE / sizeof(struct sdma_buffer_descriptor)) | |
286 | ||
287 | struct sdma_engine; | |
288 | ||
289 | /** | |
290 | * struct sdma_channel - housekeeping for a SDMA channel | |
291 | * | |
292 | * @sdma pointer to the SDMA engine for this channel | |
23889c63 | 293 | * @channel the channel number, matches dmaengine chan_id + 1 |
1ec1e82f SH |
294 | * @direction transfer type. Needed for setting SDMA script |
295 | * @peripheral_type Peripheral type. Needed for setting SDMA script | |
296 | * @event_id0 aka dma request line | |
297 | * @event_id1 for channels that use 2 events | |
298 | * @word_size peripheral access size | |
299 | * @buf_tail ID of the buffer that was processed | |
1ec1e82f SH |
300 | * @num_bd max NUM_BD. number of descriptors currently handling |
301 | */ | |
302 | struct sdma_channel { | |
303 | struct sdma_engine *sdma; | |
304 | unsigned int channel; | |
db8196df | 305 | enum dma_transfer_direction direction; |
1ec1e82f SH |
306 | enum sdma_peripheral_type peripheral_type; |
307 | unsigned int event_id0; | |
308 | unsigned int event_id1; | |
309 | enum dma_slave_buswidth word_size; | |
310 | unsigned int buf_tail; | |
1ec1e82f | 311 | unsigned int num_bd; |
d1a792f3 | 312 | unsigned int period_len; |
1ec1e82f SH |
313 | struct sdma_buffer_descriptor *bd; |
314 | dma_addr_t bd_phys; | |
315 | unsigned int pc_from_device, pc_to_device; | |
8391ecf4 | 316 | unsigned int device_to_device; |
1ec1e82f | 317 | unsigned long flags; |
8391ecf4 | 318 | dma_addr_t per_address, per_address2; |
0bbc1413 RZ |
319 | unsigned long event_mask[2]; |
320 | unsigned long watermark_level; | |
1ec1e82f SH |
321 | u32 shp_addr, per_addr; |
322 | struct dma_chan chan; | |
323 | spinlock_t lock; | |
324 | struct dma_async_tx_descriptor desc; | |
1ec1e82f | 325 | enum dma_status status; |
ab59a510 HS |
326 | unsigned int chn_count; |
327 | unsigned int chn_real_count; | |
abd9ccc8 | 328 | struct tasklet_struct tasklet; |
0b351865 | 329 | struct imx_dma_data data; |
1ec1e82f SH |
330 | }; |
331 | ||
0bbc1413 | 332 | #define IMX_DMA_SG_LOOP BIT(0) |
1ec1e82f SH |
333 | |
334 | #define MAX_DMA_CHANNELS 32 | |
335 | #define MXC_SDMA_DEFAULT_PRIORITY 1 | |
336 | #define MXC_SDMA_MIN_PRIORITY 1 | |
337 | #define MXC_SDMA_MAX_PRIORITY 7 | |
338 | ||
1ec1e82f SH |
339 | #define SDMA_FIRMWARE_MAGIC 0x414d4453 |
340 | ||
341 | /** | |
342 | * struct sdma_firmware_header - Layout of the firmware image | |
343 | * | |
344 | * @magic "SDMA" | |
345 | * @version_major increased whenever layout of struct sdma_script_start_addrs | |
346 | * changes. | |
347 | * @version_minor firmware minor version (for binary compatible changes) | |
348 | * @script_addrs_start offset of struct sdma_script_start_addrs in this image | |
349 | * @num_script_addrs Number of script addresses in this image | |
350 | * @ram_code_start offset of SDMA ram image in this firmware image | |
351 | * @ram_code_size size of SDMA ram image | |
352 | * @script_addrs Stores the start address of the SDMA scripts | |
353 | * (in SDMA memory space) | |
354 | */ | |
355 | struct sdma_firmware_header { | |
356 | u32 magic; | |
357 | u32 version_major; | |
358 | u32 version_minor; | |
359 | u32 script_addrs_start; | |
360 | u32 num_script_addrs; | |
361 | u32 ram_code_start; | |
362 | u32 ram_code_size; | |
363 | }; | |
364 | ||
17bba72f SH |
365 | struct sdma_driver_data { |
366 | int chnenbl0; | |
367 | int num_events; | |
dcfec3c0 | 368 | struct sdma_script_start_addrs *script_addrs; |
62550cd7 SG |
369 | }; |
370 | ||
1ec1e82f SH |
371 | struct sdma_engine { |
372 | struct device *dev; | |
b9b3f82f | 373 | struct device_dma_parameters dma_parms; |
1ec1e82f SH |
374 | struct sdma_channel channel[MAX_DMA_CHANNELS]; |
375 | struct sdma_channel_control *channel_control; | |
376 | void __iomem *regs; | |
1ec1e82f SH |
377 | struct sdma_context_data *context; |
378 | dma_addr_t context_phys; | |
379 | struct dma_device dma_device; | |
7560e3f3 SH |
380 | struct clk *clk_ipg; |
381 | struct clk *clk_ahb; | |
2ccaef05 | 382 | spinlock_t channel_0_lock; |
cd72b846 | 383 | u32 script_number; |
1ec1e82f | 384 | struct sdma_script_start_addrs *script_addrs; |
17bba72f | 385 | const struct sdma_driver_data *drvdata; |
8391ecf4 SW |
386 | u32 spba_start_addr; |
387 | u32 spba_end_addr; | |
17bba72f SH |
388 | }; |
389 | ||
e9fd58de | 390 | static struct sdma_driver_data sdma_imx31 = { |
17bba72f SH |
391 | .chnenbl0 = SDMA_CHNENBL0_IMX31, |
392 | .num_events = 32, | |
393 | }; | |
394 | ||
dcfec3c0 SH |
395 | static struct sdma_script_start_addrs sdma_script_imx25 = { |
396 | .ap_2_ap_addr = 729, | |
397 | .uart_2_mcu_addr = 904, | |
398 | .per_2_app_addr = 1255, | |
399 | .mcu_2_app_addr = 834, | |
400 | .uartsh_2_mcu_addr = 1120, | |
401 | .per_2_shp_addr = 1329, | |
402 | .mcu_2_shp_addr = 1048, | |
403 | .ata_2_mcu_addr = 1560, | |
404 | .mcu_2_ata_addr = 1479, | |
405 | .app_2_per_addr = 1189, | |
406 | .app_2_mcu_addr = 770, | |
407 | .shp_2_per_addr = 1407, | |
408 | .shp_2_mcu_addr = 979, | |
409 | }; | |
410 | ||
e9fd58de | 411 | static struct sdma_driver_data sdma_imx25 = { |
dcfec3c0 SH |
412 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
413 | .num_events = 48, | |
414 | .script_addrs = &sdma_script_imx25, | |
415 | }; | |
416 | ||
e9fd58de | 417 | static struct sdma_driver_data sdma_imx35 = { |
17bba72f SH |
418 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
419 | .num_events = 48, | |
1ec1e82f SH |
420 | }; |
421 | ||
dcfec3c0 SH |
422 | static struct sdma_script_start_addrs sdma_script_imx51 = { |
423 | .ap_2_ap_addr = 642, | |
424 | .uart_2_mcu_addr = 817, | |
425 | .mcu_2_app_addr = 747, | |
426 | .mcu_2_shp_addr = 961, | |
427 | .ata_2_mcu_addr = 1473, | |
428 | .mcu_2_ata_addr = 1392, | |
429 | .app_2_per_addr = 1033, | |
430 | .app_2_mcu_addr = 683, | |
431 | .shp_2_per_addr = 1251, | |
432 | .shp_2_mcu_addr = 892, | |
433 | }; | |
434 | ||
e9fd58de | 435 | static struct sdma_driver_data sdma_imx51 = { |
dcfec3c0 SH |
436 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
437 | .num_events = 48, | |
438 | .script_addrs = &sdma_script_imx51, | |
439 | }; | |
440 | ||
441 | static struct sdma_script_start_addrs sdma_script_imx53 = { | |
442 | .ap_2_ap_addr = 642, | |
443 | .app_2_mcu_addr = 683, | |
444 | .mcu_2_app_addr = 747, | |
445 | .uart_2_mcu_addr = 817, | |
446 | .shp_2_mcu_addr = 891, | |
447 | .mcu_2_shp_addr = 960, | |
448 | .uartsh_2_mcu_addr = 1032, | |
449 | .spdif_2_mcu_addr = 1100, | |
450 | .mcu_2_spdif_addr = 1134, | |
451 | .firi_2_mcu_addr = 1193, | |
452 | .mcu_2_firi_addr = 1290, | |
453 | }; | |
454 | ||
e9fd58de | 455 | static struct sdma_driver_data sdma_imx53 = { |
dcfec3c0 SH |
456 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
457 | .num_events = 48, | |
458 | .script_addrs = &sdma_script_imx53, | |
459 | }; | |
460 | ||
461 | static struct sdma_script_start_addrs sdma_script_imx6q = { | |
462 | .ap_2_ap_addr = 642, | |
463 | .uart_2_mcu_addr = 817, | |
464 | .mcu_2_app_addr = 747, | |
465 | .per_2_per_addr = 6331, | |
466 | .uartsh_2_mcu_addr = 1032, | |
467 | .mcu_2_shp_addr = 960, | |
468 | .app_2_mcu_addr = 683, | |
469 | .shp_2_mcu_addr = 891, | |
470 | .spdif_2_mcu_addr = 1100, | |
471 | .mcu_2_spdif_addr = 1134, | |
472 | }; | |
473 | ||
e9fd58de | 474 | static struct sdma_driver_data sdma_imx6q = { |
dcfec3c0 SH |
475 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
476 | .num_events = 48, | |
477 | .script_addrs = &sdma_script_imx6q, | |
478 | }; | |
479 | ||
afe7cded | 480 | static const struct platform_device_id sdma_devtypes[] = { |
62550cd7 | 481 | { |
dcfec3c0 SH |
482 | .name = "imx25-sdma", |
483 | .driver_data = (unsigned long)&sdma_imx25, | |
484 | }, { | |
62550cd7 | 485 | .name = "imx31-sdma", |
17bba72f | 486 | .driver_data = (unsigned long)&sdma_imx31, |
62550cd7 SG |
487 | }, { |
488 | .name = "imx35-sdma", | |
17bba72f | 489 | .driver_data = (unsigned long)&sdma_imx35, |
dcfec3c0 SH |
490 | }, { |
491 | .name = "imx51-sdma", | |
492 | .driver_data = (unsigned long)&sdma_imx51, | |
493 | }, { | |
494 | .name = "imx53-sdma", | |
495 | .driver_data = (unsigned long)&sdma_imx53, | |
496 | }, { | |
497 | .name = "imx6q-sdma", | |
498 | .driver_data = (unsigned long)&sdma_imx6q, | |
62550cd7 SG |
499 | }, { |
500 | /* sentinel */ | |
501 | } | |
502 | }; | |
503 | MODULE_DEVICE_TABLE(platform, sdma_devtypes); | |
504 | ||
580975d7 | 505 | static const struct of_device_id sdma_dt_ids[] = { |
dcfec3c0 SH |
506 | { .compatible = "fsl,imx6q-sdma", .data = &sdma_imx6q, }, |
507 | { .compatible = "fsl,imx53-sdma", .data = &sdma_imx53, }, | |
508 | { .compatible = "fsl,imx51-sdma", .data = &sdma_imx51, }, | |
17bba72f | 509 | { .compatible = "fsl,imx35-sdma", .data = &sdma_imx35, }, |
dcfec3c0 | 510 | { .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, }, |
63edea16 | 511 | { .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, }, |
580975d7 SG |
512 | { /* sentinel */ } |
513 | }; | |
514 | MODULE_DEVICE_TABLE(of, sdma_dt_ids); | |
515 | ||
0bbc1413 RZ |
516 | #define SDMA_H_CONFIG_DSPDMA BIT(12) /* indicates if the DSPDMA is used */ |
517 | #define SDMA_H_CONFIG_RTD_PINS BIT(11) /* indicates if Real-Time Debug pins are enabled */ | |
518 | #define SDMA_H_CONFIG_ACR BIT(4) /* indicates if AHB freq /core freq = 2 or 1 */ | |
1ec1e82f SH |
519 | #define SDMA_H_CONFIG_CSM (3) /* indicates which context switch mode is selected*/ |
520 | ||
521 | static inline u32 chnenbl_ofs(struct sdma_engine *sdma, unsigned int event) | |
522 | { | |
17bba72f | 523 | u32 chnenbl0 = sdma->drvdata->chnenbl0; |
1ec1e82f SH |
524 | return chnenbl0 + event * 4; |
525 | } | |
526 | ||
527 | static int sdma_config_ownership(struct sdma_channel *sdmac, | |
528 | bool event_override, bool mcu_override, bool dsp_override) | |
529 | { | |
530 | struct sdma_engine *sdma = sdmac->sdma; | |
531 | int channel = sdmac->channel; | |
0bbc1413 | 532 | unsigned long evt, mcu, dsp; |
1ec1e82f SH |
533 | |
534 | if (event_override && mcu_override && dsp_override) | |
535 | return -EINVAL; | |
536 | ||
c4b56857 RZ |
537 | evt = readl_relaxed(sdma->regs + SDMA_H_EVTOVR); |
538 | mcu = readl_relaxed(sdma->regs + SDMA_H_HOSTOVR); | |
539 | dsp = readl_relaxed(sdma->regs + SDMA_H_DSPOVR); | |
1ec1e82f SH |
540 | |
541 | if (dsp_override) | |
0bbc1413 | 542 | __clear_bit(channel, &dsp); |
1ec1e82f | 543 | else |
0bbc1413 | 544 | __set_bit(channel, &dsp); |
1ec1e82f SH |
545 | |
546 | if (event_override) | |
0bbc1413 | 547 | __clear_bit(channel, &evt); |
1ec1e82f | 548 | else |
0bbc1413 | 549 | __set_bit(channel, &evt); |
1ec1e82f SH |
550 | |
551 | if (mcu_override) | |
0bbc1413 | 552 | __clear_bit(channel, &mcu); |
1ec1e82f | 553 | else |
0bbc1413 | 554 | __set_bit(channel, &mcu); |
1ec1e82f | 555 | |
c4b56857 RZ |
556 | writel_relaxed(evt, sdma->regs + SDMA_H_EVTOVR); |
557 | writel_relaxed(mcu, sdma->regs + SDMA_H_HOSTOVR); | |
558 | writel_relaxed(dsp, sdma->regs + SDMA_H_DSPOVR); | |
1ec1e82f SH |
559 | |
560 | return 0; | |
561 | } | |
562 | ||
b9a59166 RZ |
563 | static void sdma_enable_channel(struct sdma_engine *sdma, int channel) |
564 | { | |
0bbc1413 | 565 | writel(BIT(channel), sdma->regs + SDMA_H_START); |
b9a59166 RZ |
566 | } |
567 | ||
1ec1e82f | 568 | /* |
2ccaef05 | 569 | * sdma_run_channel0 - run a channel and wait till it's done |
1ec1e82f | 570 | */ |
2ccaef05 | 571 | static int sdma_run_channel0(struct sdma_engine *sdma) |
1ec1e82f | 572 | { |
1ec1e82f | 573 | int ret; |
2ccaef05 | 574 | unsigned long timeout = 500; |
1ec1e82f | 575 | |
2ccaef05 | 576 | sdma_enable_channel(sdma, 0); |
1ec1e82f | 577 | |
2ccaef05 RZ |
578 | while (!(ret = readl_relaxed(sdma->regs + SDMA_H_INTR) & 1)) { |
579 | if (timeout-- <= 0) | |
580 | break; | |
581 | udelay(1); | |
582 | } | |
1ec1e82f | 583 | |
2ccaef05 RZ |
584 | if (ret) { |
585 | /* Clear the interrupt status */ | |
586 | writel_relaxed(ret, sdma->regs + SDMA_H_INTR); | |
587 | } else { | |
588 | dev_err(sdma->dev, "Timeout waiting for CH0 ready\n"); | |
589 | } | |
1ec1e82f | 590 | |
855832e4 RG |
591 | /* Set bits of CONFIG register with dynamic context switching */ |
592 | if (readl(sdma->regs + SDMA_H_CONFIG) == 0) | |
593 | writel_relaxed(SDMA_H_CONFIG_CSM, sdma->regs + SDMA_H_CONFIG); | |
594 | ||
1ec1e82f SH |
595 | return ret ? 0 : -ETIMEDOUT; |
596 | } | |
597 | ||
598 | static int sdma_load_script(struct sdma_engine *sdma, void *buf, int size, | |
599 | u32 address) | |
600 | { | |
601 | struct sdma_buffer_descriptor *bd0 = sdma->channel[0].bd; | |
602 | void *buf_virt; | |
603 | dma_addr_t buf_phys; | |
604 | int ret; | |
2ccaef05 | 605 | unsigned long flags; |
73eab978 | 606 | |
1ec1e82f SH |
607 | buf_virt = dma_alloc_coherent(NULL, |
608 | size, | |
609 | &buf_phys, GFP_KERNEL); | |
73eab978 | 610 | if (!buf_virt) { |
2ccaef05 | 611 | return -ENOMEM; |
73eab978 | 612 | } |
1ec1e82f | 613 | |
2ccaef05 RZ |
614 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
615 | ||
1ec1e82f SH |
616 | bd0->mode.command = C0_SETPM; |
617 | bd0->mode.status = BD_DONE | BD_INTR | BD_WRAP | BD_EXTD; | |
618 | bd0->mode.count = size / 2; | |
619 | bd0->buffer_addr = buf_phys; | |
620 | bd0->ext_buffer_addr = address; | |
621 | ||
622 | memcpy(buf_virt, buf, size); | |
623 | ||
2ccaef05 | 624 | ret = sdma_run_channel0(sdma); |
1ec1e82f | 625 | |
2ccaef05 | 626 | spin_unlock_irqrestore(&sdma->channel_0_lock, flags); |
1ec1e82f | 627 | |
2ccaef05 | 628 | dma_free_coherent(NULL, size, buf_virt, buf_phys); |
73eab978 | 629 | |
1ec1e82f SH |
630 | return ret; |
631 | } | |
632 | ||
633 | static void sdma_event_enable(struct sdma_channel *sdmac, unsigned int event) | |
634 | { | |
635 | struct sdma_engine *sdma = sdmac->sdma; | |
636 | int channel = sdmac->channel; | |
0bbc1413 | 637 | unsigned long val; |
1ec1e82f SH |
638 | u32 chnenbl = chnenbl_ofs(sdma, event); |
639 | ||
c4b56857 | 640 | val = readl_relaxed(sdma->regs + chnenbl); |
0bbc1413 | 641 | __set_bit(channel, &val); |
c4b56857 | 642 | writel_relaxed(val, sdma->regs + chnenbl); |
1ec1e82f SH |
643 | } |
644 | ||
645 | static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event) | |
646 | { | |
647 | struct sdma_engine *sdma = sdmac->sdma; | |
648 | int channel = sdmac->channel; | |
649 | u32 chnenbl = chnenbl_ofs(sdma, event); | |
0bbc1413 | 650 | unsigned long val; |
1ec1e82f | 651 | |
c4b56857 | 652 | val = readl_relaxed(sdma->regs + chnenbl); |
0bbc1413 | 653 | __clear_bit(channel, &val); |
c4b56857 | 654 | writel_relaxed(val, sdma->regs + chnenbl); |
1ec1e82f SH |
655 | } |
656 | ||
657 | static void sdma_handle_channel_loop(struct sdma_channel *sdmac) | |
d1a792f3 RKAL |
658 | { |
659 | if (sdmac->desc.callback) | |
660 | sdmac->desc.callback(sdmac->desc.callback_param); | |
661 | } | |
662 | ||
663 | static void sdma_update_channel_loop(struct sdma_channel *sdmac) | |
1ec1e82f SH |
664 | { |
665 | struct sdma_buffer_descriptor *bd; | |
666 | ||
667 | /* | |
668 | * loop mode. Iterate over descriptors, re-setup them and | |
669 | * call callback function. | |
670 | */ | |
671 | while (1) { | |
672 | bd = &sdmac->bd[sdmac->buf_tail]; | |
673 | ||
674 | if (bd->mode.status & BD_DONE) | |
675 | break; | |
676 | ||
677 | if (bd->mode.status & BD_RROR) | |
678 | sdmac->status = DMA_ERROR; | |
1ec1e82f SH |
679 | |
680 | bd->mode.status |= BD_DONE; | |
681 | sdmac->buf_tail++; | |
682 | sdmac->buf_tail %= sdmac->num_bd; | |
1ec1e82f SH |
683 | } |
684 | } | |
685 | ||
686 | static void mxc_sdma_handle_channel_normal(struct sdma_channel *sdmac) | |
687 | { | |
688 | struct sdma_buffer_descriptor *bd; | |
689 | int i, error = 0; | |
690 | ||
ab59a510 | 691 | sdmac->chn_real_count = 0; |
1ec1e82f SH |
692 | /* |
693 | * non loop mode. Iterate over all descriptors, collect | |
694 | * errors and call callback function | |
695 | */ | |
696 | for (i = 0; i < sdmac->num_bd; i++) { | |
697 | bd = &sdmac->bd[i]; | |
698 | ||
699 | if (bd->mode.status & (BD_DONE | BD_RROR)) | |
700 | error = -EIO; | |
ab59a510 | 701 | sdmac->chn_real_count += bd->mode.count; |
1ec1e82f SH |
702 | } |
703 | ||
704 | if (error) | |
705 | sdmac->status = DMA_ERROR; | |
706 | else | |
409bff6a | 707 | sdmac->status = DMA_COMPLETE; |
1ec1e82f | 708 | |
f7fbce07 | 709 | dma_cookie_complete(&sdmac->desc); |
1ec1e82f SH |
710 | if (sdmac->desc.callback) |
711 | sdmac->desc.callback(sdmac->desc.callback_param); | |
1ec1e82f SH |
712 | } |
713 | ||
abd9ccc8 | 714 | static void sdma_tasklet(unsigned long data) |
1ec1e82f | 715 | { |
abd9ccc8 HS |
716 | struct sdma_channel *sdmac = (struct sdma_channel *) data; |
717 | ||
1ec1e82f SH |
718 | if (sdmac->flags & IMX_DMA_SG_LOOP) |
719 | sdma_handle_channel_loop(sdmac); | |
720 | else | |
721 | mxc_sdma_handle_channel_normal(sdmac); | |
722 | } | |
723 | ||
724 | static irqreturn_t sdma_int_handler(int irq, void *dev_id) | |
725 | { | |
726 | struct sdma_engine *sdma = dev_id; | |
0bbc1413 | 727 | unsigned long stat; |
1ec1e82f | 728 | |
c4b56857 | 729 | stat = readl_relaxed(sdma->regs + SDMA_H_INTR); |
2ccaef05 RZ |
730 | /* not interested in channel 0 interrupts */ |
731 | stat &= ~1; | |
c4b56857 | 732 | writel_relaxed(stat, sdma->regs + SDMA_H_INTR); |
1ec1e82f SH |
733 | |
734 | while (stat) { | |
735 | int channel = fls(stat) - 1; | |
736 | struct sdma_channel *sdmac = &sdma->channel[channel]; | |
737 | ||
d1a792f3 RKAL |
738 | if (sdmac->flags & IMX_DMA_SG_LOOP) |
739 | sdma_update_channel_loop(sdmac); | |
740 | ||
abd9ccc8 | 741 | tasklet_schedule(&sdmac->tasklet); |
1ec1e82f | 742 | |
0bbc1413 | 743 | __clear_bit(channel, &stat); |
1ec1e82f SH |
744 | } |
745 | ||
746 | return IRQ_HANDLED; | |
747 | } | |
748 | ||
749 | /* | |
750 | * sets the pc of SDMA script according to the peripheral type | |
751 | */ | |
752 | static void sdma_get_pc(struct sdma_channel *sdmac, | |
753 | enum sdma_peripheral_type peripheral_type) | |
754 | { | |
755 | struct sdma_engine *sdma = sdmac->sdma; | |
756 | int per_2_emi = 0, emi_2_per = 0; | |
757 | /* | |
758 | * These are needed once we start to support transfers between | |
759 | * two peripherals or memory-to-memory transfers | |
760 | */ | |
761 | int per_2_per = 0, emi_2_emi = 0; | |
762 | ||
763 | sdmac->pc_from_device = 0; | |
764 | sdmac->pc_to_device = 0; | |
8391ecf4 | 765 | sdmac->device_to_device = 0; |
1ec1e82f SH |
766 | |
767 | switch (peripheral_type) { | |
768 | case IMX_DMATYPE_MEMORY: | |
769 | emi_2_emi = sdma->script_addrs->ap_2_ap_addr; | |
770 | break; | |
771 | case IMX_DMATYPE_DSP: | |
772 | emi_2_per = sdma->script_addrs->bp_2_ap_addr; | |
773 | per_2_emi = sdma->script_addrs->ap_2_bp_addr; | |
774 | break; | |
775 | case IMX_DMATYPE_FIRI: | |
776 | per_2_emi = sdma->script_addrs->firi_2_mcu_addr; | |
777 | emi_2_per = sdma->script_addrs->mcu_2_firi_addr; | |
778 | break; | |
779 | case IMX_DMATYPE_UART: | |
780 | per_2_emi = sdma->script_addrs->uart_2_mcu_addr; | |
781 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; | |
782 | break; | |
783 | case IMX_DMATYPE_UART_SP: | |
784 | per_2_emi = sdma->script_addrs->uartsh_2_mcu_addr; | |
785 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
786 | break; | |
787 | case IMX_DMATYPE_ATA: | |
788 | per_2_emi = sdma->script_addrs->ata_2_mcu_addr; | |
789 | emi_2_per = sdma->script_addrs->mcu_2_ata_addr; | |
790 | break; | |
791 | case IMX_DMATYPE_CSPI: | |
792 | case IMX_DMATYPE_EXT: | |
793 | case IMX_DMATYPE_SSI: | |
29aebfde | 794 | case IMX_DMATYPE_SAI: |
1ec1e82f SH |
795 | per_2_emi = sdma->script_addrs->app_2_mcu_addr; |
796 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; | |
797 | break; | |
1a895578 NC |
798 | case IMX_DMATYPE_SSI_DUAL: |
799 | per_2_emi = sdma->script_addrs->ssish_2_mcu_addr; | |
800 | emi_2_per = sdma->script_addrs->mcu_2_ssish_addr; | |
801 | break; | |
1ec1e82f SH |
802 | case IMX_DMATYPE_SSI_SP: |
803 | case IMX_DMATYPE_MMC: | |
804 | case IMX_DMATYPE_SDHC: | |
805 | case IMX_DMATYPE_CSPI_SP: | |
806 | case IMX_DMATYPE_ESAI: | |
807 | case IMX_DMATYPE_MSHC_SP: | |
808 | per_2_emi = sdma->script_addrs->shp_2_mcu_addr; | |
809 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
810 | break; | |
811 | case IMX_DMATYPE_ASRC: | |
812 | per_2_emi = sdma->script_addrs->asrc_2_mcu_addr; | |
813 | emi_2_per = sdma->script_addrs->asrc_2_mcu_addr; | |
814 | per_2_per = sdma->script_addrs->per_2_per_addr; | |
815 | break; | |
f892afb0 NC |
816 | case IMX_DMATYPE_ASRC_SP: |
817 | per_2_emi = sdma->script_addrs->shp_2_mcu_addr; | |
818 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
819 | per_2_per = sdma->script_addrs->per_2_per_addr; | |
820 | break; | |
1ec1e82f SH |
821 | case IMX_DMATYPE_MSHC: |
822 | per_2_emi = sdma->script_addrs->mshc_2_mcu_addr; | |
823 | emi_2_per = sdma->script_addrs->mcu_2_mshc_addr; | |
824 | break; | |
825 | case IMX_DMATYPE_CCM: | |
826 | per_2_emi = sdma->script_addrs->dptc_dvfs_addr; | |
827 | break; | |
828 | case IMX_DMATYPE_SPDIF: | |
829 | per_2_emi = sdma->script_addrs->spdif_2_mcu_addr; | |
830 | emi_2_per = sdma->script_addrs->mcu_2_spdif_addr; | |
831 | break; | |
832 | case IMX_DMATYPE_IPU_MEMORY: | |
833 | emi_2_per = sdma->script_addrs->ext_mem_2_ipu_addr; | |
834 | break; | |
835 | default: | |
836 | break; | |
837 | } | |
838 | ||
839 | sdmac->pc_from_device = per_2_emi; | |
840 | sdmac->pc_to_device = emi_2_per; | |
8391ecf4 | 841 | sdmac->device_to_device = per_2_per; |
1ec1e82f SH |
842 | } |
843 | ||
844 | static int sdma_load_context(struct sdma_channel *sdmac) | |
845 | { | |
846 | struct sdma_engine *sdma = sdmac->sdma; | |
847 | int channel = sdmac->channel; | |
848 | int load_address; | |
849 | struct sdma_context_data *context = sdma->context; | |
850 | struct sdma_buffer_descriptor *bd0 = sdma->channel[0].bd; | |
851 | int ret; | |
2ccaef05 | 852 | unsigned long flags; |
1ec1e82f | 853 | |
8391ecf4 | 854 | if (sdmac->direction == DMA_DEV_TO_MEM) |
1ec1e82f | 855 | load_address = sdmac->pc_from_device; |
8391ecf4 SW |
856 | else if (sdmac->direction == DMA_DEV_TO_DEV) |
857 | load_address = sdmac->device_to_device; | |
858 | else | |
1ec1e82f | 859 | load_address = sdmac->pc_to_device; |
1ec1e82f SH |
860 | |
861 | if (load_address < 0) | |
862 | return load_address; | |
863 | ||
864 | dev_dbg(sdma->dev, "load_address = %d\n", load_address); | |
0bbc1413 | 865 | dev_dbg(sdma->dev, "wml = 0x%08x\n", (u32)sdmac->watermark_level); |
1ec1e82f SH |
866 | dev_dbg(sdma->dev, "shp_addr = 0x%08x\n", sdmac->shp_addr); |
867 | dev_dbg(sdma->dev, "per_addr = 0x%08x\n", sdmac->per_addr); | |
0bbc1413 RZ |
868 | dev_dbg(sdma->dev, "event_mask0 = 0x%08x\n", (u32)sdmac->event_mask[0]); |
869 | dev_dbg(sdma->dev, "event_mask1 = 0x%08x\n", (u32)sdmac->event_mask[1]); | |
1ec1e82f | 870 | |
2ccaef05 | 871 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
73eab978 | 872 | |
1ec1e82f SH |
873 | memset(context, 0, sizeof(*context)); |
874 | context->channel_state.pc = load_address; | |
875 | ||
876 | /* Send by context the event mask,base address for peripheral | |
877 | * and watermark level | |
878 | */ | |
0bbc1413 RZ |
879 | context->gReg[0] = sdmac->event_mask[1]; |
880 | context->gReg[1] = sdmac->event_mask[0]; | |
1ec1e82f SH |
881 | context->gReg[2] = sdmac->per_addr; |
882 | context->gReg[6] = sdmac->shp_addr; | |
883 | context->gReg[7] = sdmac->watermark_level; | |
884 | ||
885 | bd0->mode.command = C0_SETDM; | |
886 | bd0->mode.status = BD_DONE | BD_INTR | BD_WRAP | BD_EXTD; | |
887 | bd0->mode.count = sizeof(*context) / 4; | |
888 | bd0->buffer_addr = sdma->context_phys; | |
889 | bd0->ext_buffer_addr = 2048 + (sizeof(*context) / 4) * channel; | |
2ccaef05 | 890 | ret = sdma_run_channel0(sdma); |
1ec1e82f | 891 | |
2ccaef05 | 892 | spin_unlock_irqrestore(&sdma->channel_0_lock, flags); |
73eab978 | 893 | |
1ec1e82f SH |
894 | return ret; |
895 | } | |
896 | ||
7b350ab0 MR |
897 | static struct sdma_channel *to_sdma_chan(struct dma_chan *chan) |
898 | { | |
899 | return container_of(chan, struct sdma_channel, chan); | |
900 | } | |
901 | ||
902 | static int sdma_disable_channel(struct dma_chan *chan) | |
1ec1e82f | 903 | { |
7b350ab0 | 904 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1ec1e82f SH |
905 | struct sdma_engine *sdma = sdmac->sdma; |
906 | int channel = sdmac->channel; | |
907 | ||
0bbc1413 | 908 | writel_relaxed(BIT(channel), sdma->regs + SDMA_H_STATSTOP); |
1ec1e82f | 909 | sdmac->status = DMA_ERROR; |
7b350ab0 MR |
910 | |
911 | return 0; | |
1ec1e82f SH |
912 | } |
913 | ||
8391ecf4 SW |
914 | static void sdma_set_watermarklevel_for_p2p(struct sdma_channel *sdmac) |
915 | { | |
916 | struct sdma_engine *sdma = sdmac->sdma; | |
917 | ||
918 | int lwml = sdmac->watermark_level & SDMA_WATERMARK_LEVEL_LWML; | |
919 | int hwml = (sdmac->watermark_level & SDMA_WATERMARK_LEVEL_HWML) >> 16; | |
920 | ||
921 | set_bit(sdmac->event_id0 % 32, &sdmac->event_mask[1]); | |
922 | set_bit(sdmac->event_id1 % 32, &sdmac->event_mask[0]); | |
923 | ||
924 | if (sdmac->event_id0 > 31) | |
925 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_LWE; | |
926 | ||
927 | if (sdmac->event_id1 > 31) | |
928 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_HWE; | |
929 | ||
930 | /* | |
931 | * If LWML(src_maxburst) > HWML(dst_maxburst), we need | |
932 | * swap LWML and HWML of INFO(A.3.2.5.1), also need swap | |
933 | * r0(event_mask[1]) and r1(event_mask[0]). | |
934 | */ | |
935 | if (lwml > hwml) { | |
936 | sdmac->watermark_level &= ~(SDMA_WATERMARK_LEVEL_LWML | | |
937 | SDMA_WATERMARK_LEVEL_HWML); | |
938 | sdmac->watermark_level |= hwml; | |
939 | sdmac->watermark_level |= lwml << 16; | |
940 | swap(sdmac->event_mask[0], sdmac->event_mask[1]); | |
941 | } | |
942 | ||
943 | if (sdmac->per_address2 >= sdma->spba_start_addr && | |
944 | sdmac->per_address2 <= sdma->spba_end_addr) | |
945 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_SP; | |
946 | ||
947 | if (sdmac->per_address >= sdma->spba_start_addr && | |
948 | sdmac->per_address <= sdma->spba_end_addr) | |
949 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_DP; | |
950 | ||
951 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_CONT; | |
952 | } | |
953 | ||
7b350ab0 | 954 | static int sdma_config_channel(struct dma_chan *chan) |
1ec1e82f | 955 | { |
7b350ab0 | 956 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1ec1e82f SH |
957 | int ret; |
958 | ||
7b350ab0 | 959 | sdma_disable_channel(chan); |
1ec1e82f | 960 | |
0bbc1413 RZ |
961 | sdmac->event_mask[0] = 0; |
962 | sdmac->event_mask[1] = 0; | |
1ec1e82f SH |
963 | sdmac->shp_addr = 0; |
964 | sdmac->per_addr = 0; | |
965 | ||
966 | if (sdmac->event_id0) { | |
17bba72f | 967 | if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events) |
1ec1e82f SH |
968 | return -EINVAL; |
969 | sdma_event_enable(sdmac, sdmac->event_id0); | |
970 | } | |
971 | ||
8391ecf4 SW |
972 | if (sdmac->event_id1) { |
973 | if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events) | |
974 | return -EINVAL; | |
975 | sdma_event_enable(sdmac, sdmac->event_id1); | |
976 | } | |
977 | ||
1ec1e82f SH |
978 | switch (sdmac->peripheral_type) { |
979 | case IMX_DMATYPE_DSP: | |
980 | sdma_config_ownership(sdmac, false, true, true); | |
981 | break; | |
982 | case IMX_DMATYPE_MEMORY: | |
983 | sdma_config_ownership(sdmac, false, true, false); | |
984 | break; | |
985 | default: | |
986 | sdma_config_ownership(sdmac, true, true, false); | |
987 | break; | |
988 | } | |
989 | ||
990 | sdma_get_pc(sdmac, sdmac->peripheral_type); | |
991 | ||
992 | if ((sdmac->peripheral_type != IMX_DMATYPE_MEMORY) && | |
993 | (sdmac->peripheral_type != IMX_DMATYPE_DSP)) { | |
994 | /* Handle multiple event channels differently */ | |
995 | if (sdmac->event_id1) { | |
8391ecf4 SW |
996 | if (sdmac->peripheral_type == IMX_DMATYPE_ASRC_SP || |
997 | sdmac->peripheral_type == IMX_DMATYPE_ASRC) | |
998 | sdma_set_watermarklevel_for_p2p(sdmac); | |
999 | } else | |
0bbc1413 | 1000 | __set_bit(sdmac->event_id0, sdmac->event_mask); |
8391ecf4 | 1001 | |
1ec1e82f SH |
1002 | /* Watermark Level */ |
1003 | sdmac->watermark_level |= sdmac->watermark_level; | |
1004 | /* Address */ | |
1005 | sdmac->shp_addr = sdmac->per_address; | |
8391ecf4 | 1006 | sdmac->per_addr = sdmac->per_address2; |
1ec1e82f SH |
1007 | } else { |
1008 | sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */ | |
1009 | } | |
1010 | ||
1011 | ret = sdma_load_context(sdmac); | |
1012 | ||
1013 | return ret; | |
1014 | } | |
1015 | ||
1016 | static int sdma_set_channel_priority(struct sdma_channel *sdmac, | |
1017 | unsigned int priority) | |
1018 | { | |
1019 | struct sdma_engine *sdma = sdmac->sdma; | |
1020 | int channel = sdmac->channel; | |
1021 | ||
1022 | if (priority < MXC_SDMA_MIN_PRIORITY | |
1023 | || priority > MXC_SDMA_MAX_PRIORITY) { | |
1024 | return -EINVAL; | |
1025 | } | |
1026 | ||
c4b56857 | 1027 | writel_relaxed(priority, sdma->regs + SDMA_CHNPRI_0 + 4 * channel); |
1ec1e82f SH |
1028 | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | static int sdma_request_channel(struct sdma_channel *sdmac) | |
1033 | { | |
1034 | struct sdma_engine *sdma = sdmac->sdma; | |
1035 | int channel = sdmac->channel; | |
1036 | int ret = -EBUSY; | |
1037 | ||
9f92d223 JP |
1038 | sdmac->bd = dma_zalloc_coherent(NULL, PAGE_SIZE, &sdmac->bd_phys, |
1039 | GFP_KERNEL); | |
1ec1e82f SH |
1040 | if (!sdmac->bd) { |
1041 | ret = -ENOMEM; | |
1042 | goto out; | |
1043 | } | |
1044 | ||
1ec1e82f SH |
1045 | sdma->channel_control[channel].base_bd_ptr = sdmac->bd_phys; |
1046 | sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys; | |
1047 | ||
1ec1e82f | 1048 | sdma_set_channel_priority(sdmac, MXC_SDMA_DEFAULT_PRIORITY); |
1ec1e82f SH |
1049 | return 0; |
1050 | out: | |
1051 | ||
1052 | return ret; | |
1053 | } | |
1054 | ||
1ec1e82f SH |
1055 | static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx) |
1056 | { | |
f69f2e26 | 1057 | unsigned long flags; |
1ec1e82f | 1058 | struct sdma_channel *sdmac = to_sdma_chan(tx->chan); |
1ec1e82f SH |
1059 | dma_cookie_t cookie; |
1060 | ||
f69f2e26 | 1061 | spin_lock_irqsave(&sdmac->lock, flags); |
1ec1e82f | 1062 | |
884485e1 | 1063 | cookie = dma_cookie_assign(tx); |
1ec1e82f | 1064 | |
f69f2e26 | 1065 | spin_unlock_irqrestore(&sdmac->lock, flags); |
1ec1e82f SH |
1066 | |
1067 | return cookie; | |
1068 | } | |
1069 | ||
1070 | static int sdma_alloc_chan_resources(struct dma_chan *chan) | |
1071 | { | |
1072 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1073 | struct imx_dma_data *data = chan->private; | |
1074 | int prio, ret; | |
1075 | ||
1ec1e82f SH |
1076 | if (!data) |
1077 | return -EINVAL; | |
1078 | ||
1079 | switch (data->priority) { | |
1080 | case DMA_PRIO_HIGH: | |
1081 | prio = 3; | |
1082 | break; | |
1083 | case DMA_PRIO_MEDIUM: | |
1084 | prio = 2; | |
1085 | break; | |
1086 | case DMA_PRIO_LOW: | |
1087 | default: | |
1088 | prio = 1; | |
1089 | break; | |
1090 | } | |
1091 | ||
1092 | sdmac->peripheral_type = data->peripheral_type; | |
1093 | sdmac->event_id0 = data->dma_request; | |
8391ecf4 | 1094 | sdmac->event_id1 = data->dma_request2; |
c2c744d3 | 1095 | |
b93edcdd FE |
1096 | ret = clk_enable(sdmac->sdma->clk_ipg); |
1097 | if (ret) | |
1098 | return ret; | |
1099 | ret = clk_enable(sdmac->sdma->clk_ahb); | |
1100 | if (ret) | |
1101 | goto disable_clk_ipg; | |
c2c744d3 | 1102 | |
3bb5e7ca | 1103 | ret = sdma_request_channel(sdmac); |
1ec1e82f | 1104 | if (ret) |
b93edcdd | 1105 | goto disable_clk_ahb; |
1ec1e82f | 1106 | |
3bb5e7ca | 1107 | ret = sdma_set_channel_priority(sdmac, prio); |
1ec1e82f | 1108 | if (ret) |
b93edcdd | 1109 | goto disable_clk_ahb; |
1ec1e82f SH |
1110 | |
1111 | dma_async_tx_descriptor_init(&sdmac->desc, chan); | |
1112 | sdmac->desc.tx_submit = sdma_tx_submit; | |
1113 | /* txd.flags will be overwritten in prep funcs */ | |
1114 | sdmac->desc.flags = DMA_CTRL_ACK; | |
1115 | ||
1116 | return 0; | |
b93edcdd FE |
1117 | |
1118 | disable_clk_ahb: | |
1119 | clk_disable(sdmac->sdma->clk_ahb); | |
1120 | disable_clk_ipg: | |
1121 | clk_disable(sdmac->sdma->clk_ipg); | |
1122 | return ret; | |
1ec1e82f SH |
1123 | } |
1124 | ||
1125 | static void sdma_free_chan_resources(struct dma_chan *chan) | |
1126 | { | |
1127 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1128 | struct sdma_engine *sdma = sdmac->sdma; | |
1129 | ||
7b350ab0 | 1130 | sdma_disable_channel(chan); |
1ec1e82f SH |
1131 | |
1132 | if (sdmac->event_id0) | |
1133 | sdma_event_disable(sdmac, sdmac->event_id0); | |
1134 | if (sdmac->event_id1) | |
1135 | sdma_event_disable(sdmac, sdmac->event_id1); | |
1136 | ||
1137 | sdmac->event_id0 = 0; | |
1138 | sdmac->event_id1 = 0; | |
1139 | ||
1140 | sdma_set_channel_priority(sdmac, 0); | |
1141 | ||
1142 | dma_free_coherent(NULL, PAGE_SIZE, sdmac->bd, sdmac->bd_phys); | |
1143 | ||
7560e3f3 SH |
1144 | clk_disable(sdma->clk_ipg); |
1145 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1146 | } |
1147 | ||
1148 | static struct dma_async_tx_descriptor *sdma_prep_slave_sg( | |
1149 | struct dma_chan *chan, struct scatterlist *sgl, | |
db8196df | 1150 | unsigned int sg_len, enum dma_transfer_direction direction, |
185ecb5f | 1151 | unsigned long flags, void *context) |
1ec1e82f SH |
1152 | { |
1153 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1154 | struct sdma_engine *sdma = sdmac->sdma; | |
1155 | int ret, i, count; | |
23889c63 | 1156 | int channel = sdmac->channel; |
1ec1e82f SH |
1157 | struct scatterlist *sg; |
1158 | ||
1159 | if (sdmac->status == DMA_IN_PROGRESS) | |
1160 | return NULL; | |
1161 | sdmac->status = DMA_IN_PROGRESS; | |
1162 | ||
1163 | sdmac->flags = 0; | |
1164 | ||
8e2e27c7 RZ |
1165 | sdmac->buf_tail = 0; |
1166 | ||
1ec1e82f SH |
1167 | dev_dbg(sdma->dev, "setting up %d entries for channel %d.\n", |
1168 | sg_len, channel); | |
1169 | ||
1170 | sdmac->direction = direction; | |
1171 | ret = sdma_load_context(sdmac); | |
1172 | if (ret) | |
1173 | goto err_out; | |
1174 | ||
1175 | if (sg_len > NUM_BD) { | |
1176 | dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n", | |
1177 | channel, sg_len, NUM_BD); | |
1178 | ret = -EINVAL; | |
1179 | goto err_out; | |
1180 | } | |
1181 | ||
ab59a510 | 1182 | sdmac->chn_count = 0; |
1ec1e82f SH |
1183 | for_each_sg(sgl, sg, sg_len, i) { |
1184 | struct sdma_buffer_descriptor *bd = &sdmac->bd[i]; | |
1185 | int param; | |
1186 | ||
d2f5c276 | 1187 | bd->buffer_addr = sg->dma_address; |
1ec1e82f | 1188 | |
fdaf9c4b | 1189 | count = sg_dma_len(sg); |
1ec1e82f SH |
1190 | |
1191 | if (count > 0xffff) { | |
1192 | dev_err(sdma->dev, "SDMA channel %d: maximum bytes for sg entry exceeded: %d > %d\n", | |
1193 | channel, count, 0xffff); | |
1194 | ret = -EINVAL; | |
1195 | goto err_out; | |
1196 | } | |
1197 | ||
1198 | bd->mode.count = count; | |
ab59a510 | 1199 | sdmac->chn_count += count; |
1ec1e82f SH |
1200 | |
1201 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) { | |
1202 | ret = -EINVAL; | |
1203 | goto err_out; | |
1204 | } | |
1fa81c27 SH |
1205 | |
1206 | switch (sdmac->word_size) { | |
1207 | case DMA_SLAVE_BUSWIDTH_4_BYTES: | |
1ec1e82f | 1208 | bd->mode.command = 0; |
1fa81c27 SH |
1209 | if (count & 3 || sg->dma_address & 3) |
1210 | return NULL; | |
1211 | break; | |
1212 | case DMA_SLAVE_BUSWIDTH_2_BYTES: | |
1213 | bd->mode.command = 2; | |
1214 | if (count & 1 || sg->dma_address & 1) | |
1215 | return NULL; | |
1216 | break; | |
1217 | case DMA_SLAVE_BUSWIDTH_1_BYTE: | |
1218 | bd->mode.command = 1; | |
1219 | break; | |
1220 | default: | |
1221 | return NULL; | |
1222 | } | |
1ec1e82f SH |
1223 | |
1224 | param = BD_DONE | BD_EXTD | BD_CONT; | |
1225 | ||
341b9419 | 1226 | if (i + 1 == sg_len) { |
1ec1e82f | 1227 | param |= BD_INTR; |
341b9419 SG |
1228 | param |= BD_LAST; |
1229 | param &= ~BD_CONT; | |
1ec1e82f SH |
1230 | } |
1231 | ||
c3cc74b2 OJ |
1232 | dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n", |
1233 | i, count, (u64)sg->dma_address, | |
1ec1e82f SH |
1234 | param & BD_WRAP ? "wrap" : "", |
1235 | param & BD_INTR ? " intr" : ""); | |
1236 | ||
1237 | bd->mode.status = param; | |
1238 | } | |
1239 | ||
1240 | sdmac->num_bd = sg_len; | |
1241 | sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys; | |
1242 | ||
1243 | return &sdmac->desc; | |
1244 | err_out: | |
4b2ce9dd | 1245 | sdmac->status = DMA_ERROR; |
1ec1e82f SH |
1246 | return NULL; |
1247 | } | |
1248 | ||
1249 | static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic( | |
1250 | struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, | |
185ecb5f | 1251 | size_t period_len, enum dma_transfer_direction direction, |
31c1e5a1 | 1252 | unsigned long flags) |
1ec1e82f SH |
1253 | { |
1254 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1255 | struct sdma_engine *sdma = sdmac->sdma; | |
1256 | int num_periods = buf_len / period_len; | |
23889c63 | 1257 | int channel = sdmac->channel; |
1ec1e82f SH |
1258 | int ret, i = 0, buf = 0; |
1259 | ||
1260 | dev_dbg(sdma->dev, "%s channel: %d\n", __func__, channel); | |
1261 | ||
1262 | if (sdmac->status == DMA_IN_PROGRESS) | |
1263 | return NULL; | |
1264 | ||
1265 | sdmac->status = DMA_IN_PROGRESS; | |
1266 | ||
8e2e27c7 | 1267 | sdmac->buf_tail = 0; |
d1a792f3 | 1268 | sdmac->period_len = period_len; |
8e2e27c7 | 1269 | |
1ec1e82f SH |
1270 | sdmac->flags |= IMX_DMA_SG_LOOP; |
1271 | sdmac->direction = direction; | |
1272 | ret = sdma_load_context(sdmac); | |
1273 | if (ret) | |
1274 | goto err_out; | |
1275 | ||
1276 | if (num_periods > NUM_BD) { | |
1277 | dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n", | |
1278 | channel, num_periods, NUM_BD); | |
1279 | goto err_out; | |
1280 | } | |
1281 | ||
1282 | if (period_len > 0xffff) { | |
1283 | dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %d > %d\n", | |
1284 | channel, period_len, 0xffff); | |
1285 | goto err_out; | |
1286 | } | |
1287 | ||
1288 | while (buf < buf_len) { | |
1289 | struct sdma_buffer_descriptor *bd = &sdmac->bd[i]; | |
1290 | int param; | |
1291 | ||
1292 | bd->buffer_addr = dma_addr; | |
1293 | ||
1294 | bd->mode.count = period_len; | |
1295 | ||
1296 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) | |
1297 | goto err_out; | |
1298 | if (sdmac->word_size == DMA_SLAVE_BUSWIDTH_4_BYTES) | |
1299 | bd->mode.command = 0; | |
1300 | else | |
1301 | bd->mode.command = sdmac->word_size; | |
1302 | ||
1303 | param = BD_DONE | BD_EXTD | BD_CONT | BD_INTR; | |
1304 | if (i + 1 == num_periods) | |
1305 | param |= BD_WRAP; | |
1306 | ||
c3cc74b2 OJ |
1307 | dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n", |
1308 | i, period_len, (u64)dma_addr, | |
1ec1e82f SH |
1309 | param & BD_WRAP ? "wrap" : "", |
1310 | param & BD_INTR ? " intr" : ""); | |
1311 | ||
1312 | bd->mode.status = param; | |
1313 | ||
1314 | dma_addr += period_len; | |
1315 | buf += period_len; | |
1316 | ||
1317 | i++; | |
1318 | } | |
1319 | ||
1320 | sdmac->num_bd = num_periods; | |
1321 | sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys; | |
1322 | ||
1323 | return &sdmac->desc; | |
1324 | err_out: | |
1325 | sdmac->status = DMA_ERROR; | |
1326 | return NULL; | |
1327 | } | |
1328 | ||
7b350ab0 MR |
1329 | static int sdma_config(struct dma_chan *chan, |
1330 | struct dma_slave_config *dmaengine_cfg) | |
1ec1e82f SH |
1331 | { |
1332 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1ec1e82f | 1333 | |
7b350ab0 MR |
1334 | if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) { |
1335 | sdmac->per_address = dmaengine_cfg->src_addr; | |
1336 | sdmac->watermark_level = dmaengine_cfg->src_maxburst * | |
1337 | dmaengine_cfg->src_addr_width; | |
1338 | sdmac->word_size = dmaengine_cfg->src_addr_width; | |
8391ecf4 SW |
1339 | } else if (dmaengine_cfg->direction == DMA_DEV_TO_DEV) { |
1340 | sdmac->per_address2 = dmaengine_cfg->src_addr; | |
1341 | sdmac->per_address = dmaengine_cfg->dst_addr; | |
1342 | sdmac->watermark_level = dmaengine_cfg->src_maxburst & | |
1343 | SDMA_WATERMARK_LEVEL_LWML; | |
1344 | sdmac->watermark_level |= (dmaengine_cfg->dst_maxburst << 16) & | |
1345 | SDMA_WATERMARK_LEVEL_HWML; | |
1346 | sdmac->word_size = dmaengine_cfg->dst_addr_width; | |
7b350ab0 MR |
1347 | } else { |
1348 | sdmac->per_address = dmaengine_cfg->dst_addr; | |
1349 | sdmac->watermark_level = dmaengine_cfg->dst_maxburst * | |
1350 | dmaengine_cfg->dst_addr_width; | |
1351 | sdmac->word_size = dmaengine_cfg->dst_addr_width; | |
1352 | } | |
1353 | sdmac->direction = dmaengine_cfg->direction; | |
1354 | return sdma_config_channel(chan); | |
1ec1e82f SH |
1355 | } |
1356 | ||
1357 | static enum dma_status sdma_tx_status(struct dma_chan *chan, | |
e8e3a790 AS |
1358 | dma_cookie_t cookie, |
1359 | struct dma_tx_state *txstate) | |
1ec1e82f SH |
1360 | { |
1361 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
d1a792f3 RKAL |
1362 | u32 residue; |
1363 | ||
1364 | if (sdmac->flags & IMX_DMA_SG_LOOP) | |
1365 | residue = (sdmac->num_bd - sdmac->buf_tail) * sdmac->period_len; | |
1366 | else | |
1367 | residue = sdmac->chn_count - sdmac->chn_real_count; | |
1ec1e82f | 1368 | |
e8e3a790 | 1369 | dma_set_tx_state(txstate, chan->completed_cookie, chan->cookie, |
d1a792f3 | 1370 | residue); |
1ec1e82f | 1371 | |
8a965911 | 1372 | return sdmac->status; |
1ec1e82f SH |
1373 | } |
1374 | ||
1375 | static void sdma_issue_pending(struct dma_chan *chan) | |
1376 | { | |
2b4f130e SH |
1377 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1378 | struct sdma_engine *sdma = sdmac->sdma; | |
1379 | ||
1380 | if (sdmac->status == DMA_IN_PROGRESS) | |
1381 | sdma_enable_channel(sdma, sdmac->channel); | |
1ec1e82f SH |
1382 | } |
1383 | ||
5b28aa31 | 1384 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34 |
cd72b846 | 1385 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2 38 |
a572460b | 1386 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 41 |
5b28aa31 SH |
1387 | |
1388 | static void sdma_add_scripts(struct sdma_engine *sdma, | |
1389 | const struct sdma_script_start_addrs *addr) | |
1390 | { | |
1391 | s32 *addr_arr = (u32 *)addr; | |
1392 | s32 *saddr_arr = (u32 *)sdma->script_addrs; | |
1393 | int i; | |
1394 | ||
70dabaed NC |
1395 | /* use the default firmware in ROM if missing external firmware */ |
1396 | if (!sdma->script_number) | |
1397 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; | |
1398 | ||
cd72b846 | 1399 | for (i = 0; i < sdma->script_number; i++) |
5b28aa31 SH |
1400 | if (addr_arr[i] > 0) |
1401 | saddr_arr[i] = addr_arr[i]; | |
1402 | } | |
1403 | ||
7b4b88e0 | 1404 | static void sdma_load_firmware(const struct firmware *fw, void *context) |
5b28aa31 | 1405 | { |
7b4b88e0 | 1406 | struct sdma_engine *sdma = context; |
5b28aa31 | 1407 | const struct sdma_firmware_header *header; |
5b28aa31 SH |
1408 | const struct sdma_script_start_addrs *addr; |
1409 | unsigned short *ram_code; | |
1410 | ||
7b4b88e0 | 1411 | if (!fw) { |
0f927a11 SH |
1412 | dev_info(sdma->dev, "external firmware not found, using ROM firmware\n"); |
1413 | /* In this case we just use the ROM firmware. */ | |
7b4b88e0 SH |
1414 | return; |
1415 | } | |
5b28aa31 SH |
1416 | |
1417 | if (fw->size < sizeof(*header)) | |
1418 | goto err_firmware; | |
1419 | ||
1420 | header = (struct sdma_firmware_header *)fw->data; | |
1421 | ||
1422 | if (header->magic != SDMA_FIRMWARE_MAGIC) | |
1423 | goto err_firmware; | |
1424 | if (header->ram_code_start + header->ram_code_size > fw->size) | |
1425 | goto err_firmware; | |
cd72b846 | 1426 | switch (header->version_major) { |
681d15ec AV |
1427 | case 1: |
1428 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; | |
1429 | break; | |
1430 | case 2: | |
1431 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2; | |
1432 | break; | |
a572460b FE |
1433 | case 3: |
1434 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3; | |
1435 | break; | |
681d15ec AV |
1436 | default: |
1437 | dev_err(sdma->dev, "unknown firmware version\n"); | |
1438 | goto err_firmware; | |
cd72b846 | 1439 | } |
5b28aa31 SH |
1440 | |
1441 | addr = (void *)header + header->script_addrs_start; | |
1442 | ram_code = (void *)header + header->ram_code_start; | |
1443 | ||
7560e3f3 SH |
1444 | clk_enable(sdma->clk_ipg); |
1445 | clk_enable(sdma->clk_ahb); | |
5b28aa31 SH |
1446 | /* download the RAM image for SDMA */ |
1447 | sdma_load_script(sdma, ram_code, | |
1448 | header->ram_code_size, | |
6866fd3b | 1449 | addr->ram_code_start_addr); |
7560e3f3 SH |
1450 | clk_disable(sdma->clk_ipg); |
1451 | clk_disable(sdma->clk_ahb); | |
5b28aa31 SH |
1452 | |
1453 | sdma_add_scripts(sdma, addr); | |
1454 | ||
1455 | dev_info(sdma->dev, "loaded firmware %d.%d\n", | |
1456 | header->version_major, | |
1457 | header->version_minor); | |
1458 | ||
1459 | err_firmware: | |
1460 | release_firmware(fw); | |
7b4b88e0 SH |
1461 | } |
1462 | ||
d078cd1b ZW |
1463 | #define EVENT_REMAP_CELLS 3 |
1464 | ||
29f493da | 1465 | static int sdma_event_remap(struct sdma_engine *sdma) |
d078cd1b ZW |
1466 | { |
1467 | struct device_node *np = sdma->dev->of_node; | |
1468 | struct device_node *gpr_np = of_parse_phandle(np, "gpr", 0); | |
1469 | struct property *event_remap; | |
1470 | struct regmap *gpr; | |
1471 | char propname[] = "fsl,sdma-event-remap"; | |
1472 | u32 reg, val, shift, num_map, i; | |
1473 | int ret = 0; | |
1474 | ||
1475 | if (IS_ERR(np) || IS_ERR(gpr_np)) | |
1476 | goto out; | |
1477 | ||
1478 | event_remap = of_find_property(np, propname, NULL); | |
1479 | num_map = event_remap ? (event_remap->length / sizeof(u32)) : 0; | |
1480 | if (!num_map) { | |
ce078af7 | 1481 | dev_dbg(sdma->dev, "no event needs to be remapped\n"); |
d078cd1b ZW |
1482 | goto out; |
1483 | } else if (num_map % EVENT_REMAP_CELLS) { | |
1484 | dev_err(sdma->dev, "the property %s must modulo %d\n", | |
1485 | propname, EVENT_REMAP_CELLS); | |
1486 | ret = -EINVAL; | |
1487 | goto out; | |
1488 | } | |
1489 | ||
1490 | gpr = syscon_node_to_regmap(gpr_np); | |
1491 | if (IS_ERR(gpr)) { | |
1492 | dev_err(sdma->dev, "failed to get gpr regmap\n"); | |
1493 | ret = PTR_ERR(gpr); | |
1494 | goto out; | |
1495 | } | |
1496 | ||
1497 | for (i = 0; i < num_map; i += EVENT_REMAP_CELLS) { | |
1498 | ret = of_property_read_u32_index(np, propname, i, ®); | |
1499 | if (ret) { | |
1500 | dev_err(sdma->dev, "failed to read property %s index %d\n", | |
1501 | propname, i); | |
1502 | goto out; | |
1503 | } | |
1504 | ||
1505 | ret = of_property_read_u32_index(np, propname, i + 1, &shift); | |
1506 | if (ret) { | |
1507 | dev_err(sdma->dev, "failed to read property %s index %d\n", | |
1508 | propname, i + 1); | |
1509 | goto out; | |
1510 | } | |
1511 | ||
1512 | ret = of_property_read_u32_index(np, propname, i + 2, &val); | |
1513 | if (ret) { | |
1514 | dev_err(sdma->dev, "failed to read property %s index %d\n", | |
1515 | propname, i + 2); | |
1516 | goto out; | |
1517 | } | |
1518 | ||
1519 | regmap_update_bits(gpr, reg, BIT(shift), val << shift); | |
1520 | } | |
1521 | ||
1522 | out: | |
1523 | if (!IS_ERR(gpr_np)) | |
1524 | of_node_put(gpr_np); | |
1525 | ||
1526 | return ret; | |
1527 | } | |
1528 | ||
fe6cf289 | 1529 | static int sdma_get_firmware(struct sdma_engine *sdma, |
7b4b88e0 SH |
1530 | const char *fw_name) |
1531 | { | |
1532 | int ret; | |
1533 | ||
1534 | ret = request_firmware_nowait(THIS_MODULE, | |
1535 | FW_ACTION_HOTPLUG, fw_name, sdma->dev, | |
1536 | GFP_KERNEL, sdma, sdma_load_firmware); | |
5b28aa31 SH |
1537 | |
1538 | return ret; | |
1539 | } | |
1540 | ||
19bfc772 | 1541 | static int sdma_init(struct sdma_engine *sdma) |
1ec1e82f SH |
1542 | { |
1543 | int i, ret; | |
1544 | dma_addr_t ccb_phys; | |
1545 | ||
b93edcdd FE |
1546 | ret = clk_enable(sdma->clk_ipg); |
1547 | if (ret) | |
1548 | return ret; | |
1549 | ret = clk_enable(sdma->clk_ahb); | |
1550 | if (ret) | |
1551 | goto disable_clk_ipg; | |
1ec1e82f SH |
1552 | |
1553 | /* Be sure SDMA has not started yet */ | |
c4b56857 | 1554 | writel_relaxed(0, sdma->regs + SDMA_H_C0PTR); |
1ec1e82f SH |
1555 | |
1556 | sdma->channel_control = dma_alloc_coherent(NULL, | |
1557 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control) + | |
1558 | sizeof(struct sdma_context_data), | |
1559 | &ccb_phys, GFP_KERNEL); | |
1560 | ||
1561 | if (!sdma->channel_control) { | |
1562 | ret = -ENOMEM; | |
1563 | goto err_dma_alloc; | |
1564 | } | |
1565 | ||
1566 | sdma->context = (void *)sdma->channel_control + | |
1567 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control); | |
1568 | sdma->context_phys = ccb_phys + | |
1569 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control); | |
1570 | ||
1571 | /* Zero-out the CCB structures array just allocated */ | |
1572 | memset(sdma->channel_control, 0, | |
1573 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control)); | |
1574 | ||
1575 | /* disable all channels */ | |
17bba72f | 1576 | for (i = 0; i < sdma->drvdata->num_events; i++) |
c4b56857 | 1577 | writel_relaxed(0, sdma->regs + chnenbl_ofs(sdma, i)); |
1ec1e82f SH |
1578 | |
1579 | /* All channels have priority 0 */ | |
1580 | for (i = 0; i < MAX_DMA_CHANNELS; i++) | |
c4b56857 | 1581 | writel_relaxed(0, sdma->regs + SDMA_CHNPRI_0 + i * 4); |
1ec1e82f SH |
1582 | |
1583 | ret = sdma_request_channel(&sdma->channel[0]); | |
1584 | if (ret) | |
1585 | goto err_dma_alloc; | |
1586 | ||
1587 | sdma_config_ownership(&sdma->channel[0], false, true, false); | |
1588 | ||
1589 | /* Set Command Channel (Channel Zero) */ | |
c4b56857 | 1590 | writel_relaxed(0x4050, sdma->regs + SDMA_CHN0ADDR); |
1ec1e82f SH |
1591 | |
1592 | /* Set bits of CONFIG register but with static context switching */ | |
1593 | /* FIXME: Check whether to set ACR bit depending on clock ratios */ | |
c4b56857 | 1594 | writel_relaxed(0, sdma->regs + SDMA_H_CONFIG); |
1ec1e82f | 1595 | |
c4b56857 | 1596 | writel_relaxed(ccb_phys, sdma->regs + SDMA_H_C0PTR); |
1ec1e82f | 1597 | |
1ec1e82f SH |
1598 | /* Initializes channel's priorities */ |
1599 | sdma_set_channel_priority(&sdma->channel[0], 7); | |
1600 | ||
7560e3f3 SH |
1601 | clk_disable(sdma->clk_ipg); |
1602 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1603 | |
1604 | return 0; | |
1605 | ||
1606 | err_dma_alloc: | |
7560e3f3 | 1607 | clk_disable(sdma->clk_ahb); |
b93edcdd FE |
1608 | disable_clk_ipg: |
1609 | clk_disable(sdma->clk_ipg); | |
1ec1e82f SH |
1610 | dev_err(sdma->dev, "initialisation failed with %d\n", ret); |
1611 | return ret; | |
1612 | } | |
1613 | ||
9479e17c SG |
1614 | static bool sdma_filter_fn(struct dma_chan *chan, void *fn_param) |
1615 | { | |
0b351865 | 1616 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
9479e17c SG |
1617 | struct imx_dma_data *data = fn_param; |
1618 | ||
1619 | if (!imx_dma_is_general_purpose(chan)) | |
1620 | return false; | |
1621 | ||
0b351865 NC |
1622 | sdmac->data = *data; |
1623 | chan->private = &sdmac->data; | |
9479e17c SG |
1624 | |
1625 | return true; | |
1626 | } | |
1627 | ||
1628 | static struct dma_chan *sdma_xlate(struct of_phandle_args *dma_spec, | |
1629 | struct of_dma *ofdma) | |
1630 | { | |
1631 | struct sdma_engine *sdma = ofdma->of_dma_data; | |
1632 | dma_cap_mask_t mask = sdma->dma_device.cap_mask; | |
1633 | struct imx_dma_data data; | |
1634 | ||
1635 | if (dma_spec->args_count != 3) | |
1636 | return NULL; | |
1637 | ||
1638 | data.dma_request = dma_spec->args[0]; | |
1639 | data.peripheral_type = dma_spec->args[1]; | |
1640 | data.priority = dma_spec->args[2]; | |
8391ecf4 SW |
1641 | /* |
1642 | * init dma_request2 to zero, which is not used by the dts. | |
1643 | * For P2P, dma_request2 is init from dma_request_channel(), | |
1644 | * chan->private will point to the imx_dma_data, and in | |
1645 | * device_alloc_chan_resources(), imx_dma_data.dma_request2 will | |
1646 | * be set to sdmac->event_id1. | |
1647 | */ | |
1648 | data.dma_request2 = 0; | |
9479e17c SG |
1649 | |
1650 | return dma_request_channel(mask, sdma_filter_fn, &data); | |
1651 | } | |
1652 | ||
e34b731f | 1653 | static int sdma_probe(struct platform_device *pdev) |
1ec1e82f | 1654 | { |
580975d7 SG |
1655 | const struct of_device_id *of_id = |
1656 | of_match_device(sdma_dt_ids, &pdev->dev); | |
1657 | struct device_node *np = pdev->dev.of_node; | |
8391ecf4 | 1658 | struct device_node *spba_bus; |
580975d7 | 1659 | const char *fw_name; |
1ec1e82f | 1660 | int ret; |
1ec1e82f | 1661 | int irq; |
1ec1e82f | 1662 | struct resource *iores; |
8391ecf4 | 1663 | struct resource spba_res; |
d4adcc01 | 1664 | struct sdma_platform_data *pdata = dev_get_platdata(&pdev->dev); |
1ec1e82f | 1665 | int i; |
1ec1e82f | 1666 | struct sdma_engine *sdma; |
36e2f21a | 1667 | s32 *saddr_arr; |
17bba72f SH |
1668 | const struct sdma_driver_data *drvdata = NULL; |
1669 | ||
1670 | if (of_id) | |
1671 | drvdata = of_id->data; | |
1672 | else if (pdev->id_entry) | |
1673 | drvdata = (void *)pdev->id_entry->driver_data; | |
1674 | ||
1675 | if (!drvdata) { | |
1676 | dev_err(&pdev->dev, "unable to find driver data\n"); | |
1677 | return -EINVAL; | |
1678 | } | |
1ec1e82f | 1679 | |
42536b9f PR |
1680 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
1681 | if (ret) | |
1682 | return ret; | |
1683 | ||
7f24e0ee | 1684 | sdma = devm_kzalloc(&pdev->dev, sizeof(*sdma), GFP_KERNEL); |
1ec1e82f SH |
1685 | if (!sdma) |
1686 | return -ENOMEM; | |
1687 | ||
2ccaef05 | 1688 | spin_lock_init(&sdma->channel_0_lock); |
73eab978 | 1689 | |
1ec1e82f | 1690 | sdma->dev = &pdev->dev; |
17bba72f | 1691 | sdma->drvdata = drvdata; |
1ec1e82f | 1692 | |
1ec1e82f | 1693 | irq = platform_get_irq(pdev, 0); |
7f24e0ee | 1694 | if (irq < 0) |
63c72e02 | 1695 | return irq; |
1ec1e82f | 1696 | |
7f24e0ee FE |
1697 | iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1698 | sdma->regs = devm_ioremap_resource(&pdev->dev, iores); | |
1699 | if (IS_ERR(sdma->regs)) | |
1700 | return PTR_ERR(sdma->regs); | |
1ec1e82f | 1701 | |
7560e3f3 | 1702 | sdma->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); |
7f24e0ee FE |
1703 | if (IS_ERR(sdma->clk_ipg)) |
1704 | return PTR_ERR(sdma->clk_ipg); | |
1ec1e82f | 1705 | |
7560e3f3 | 1706 | sdma->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); |
7f24e0ee FE |
1707 | if (IS_ERR(sdma->clk_ahb)) |
1708 | return PTR_ERR(sdma->clk_ahb); | |
7560e3f3 SH |
1709 | |
1710 | clk_prepare(sdma->clk_ipg); | |
1711 | clk_prepare(sdma->clk_ahb); | |
1712 | ||
7f24e0ee FE |
1713 | ret = devm_request_irq(&pdev->dev, irq, sdma_int_handler, 0, "sdma", |
1714 | sdma); | |
1ec1e82f | 1715 | if (ret) |
7f24e0ee | 1716 | return ret; |
1ec1e82f | 1717 | |
5b28aa31 | 1718 | sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL); |
7f24e0ee FE |
1719 | if (!sdma->script_addrs) |
1720 | return -ENOMEM; | |
1ec1e82f | 1721 | |
36e2f21a SH |
1722 | /* initially no scripts available */ |
1723 | saddr_arr = (s32 *)sdma->script_addrs; | |
1724 | for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++) | |
1725 | saddr_arr[i] = -EINVAL; | |
1726 | ||
7214a8b1 SH |
1727 | dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask); |
1728 | dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask); | |
1729 | ||
1ec1e82f SH |
1730 | INIT_LIST_HEAD(&sdma->dma_device.channels); |
1731 | /* Initialize channel parameters */ | |
1732 | for (i = 0; i < MAX_DMA_CHANNELS; i++) { | |
1733 | struct sdma_channel *sdmac = &sdma->channel[i]; | |
1734 | ||
1735 | sdmac->sdma = sdma; | |
1736 | spin_lock_init(&sdmac->lock); | |
1737 | ||
1ec1e82f | 1738 | sdmac->chan.device = &sdma->dma_device; |
8ac69546 | 1739 | dma_cookie_init(&sdmac->chan); |
1ec1e82f SH |
1740 | sdmac->channel = i; |
1741 | ||
abd9ccc8 HS |
1742 | tasklet_init(&sdmac->tasklet, sdma_tasklet, |
1743 | (unsigned long) sdmac); | |
23889c63 SH |
1744 | /* |
1745 | * Add the channel to the DMAC list. Do not add channel 0 though | |
1746 | * because we need it internally in the SDMA driver. This also means | |
1747 | * that channel 0 in dmaengine counting matches sdma channel 1. | |
1748 | */ | |
1749 | if (i) | |
1750 | list_add_tail(&sdmac->chan.device_node, | |
1751 | &sdma->dma_device.channels); | |
1ec1e82f SH |
1752 | } |
1753 | ||
5b28aa31 | 1754 | ret = sdma_init(sdma); |
1ec1e82f SH |
1755 | if (ret) |
1756 | goto err_init; | |
1757 | ||
d078cd1b ZW |
1758 | ret = sdma_event_remap(sdma); |
1759 | if (ret) | |
1760 | goto err_init; | |
1761 | ||
dcfec3c0 SH |
1762 | if (sdma->drvdata->script_addrs) |
1763 | sdma_add_scripts(sdma, sdma->drvdata->script_addrs); | |
580975d7 | 1764 | if (pdata && pdata->script_addrs) |
5b28aa31 SH |
1765 | sdma_add_scripts(sdma, pdata->script_addrs); |
1766 | ||
580975d7 | 1767 | if (pdata) { |
6d0d7e2d FE |
1768 | ret = sdma_get_firmware(sdma, pdata->fw_name); |
1769 | if (ret) | |
ad1122e5 | 1770 | dev_warn(&pdev->dev, "failed to get firmware from platform data\n"); |
580975d7 SG |
1771 | } else { |
1772 | /* | |
1773 | * Because that device tree does not encode ROM script address, | |
1774 | * the RAM script in firmware is mandatory for device tree | |
1775 | * probe, otherwise it fails. | |
1776 | */ | |
1777 | ret = of_property_read_string(np, "fsl,sdma-ram-script-name", | |
1778 | &fw_name); | |
6602b0dd | 1779 | if (ret) |
ad1122e5 | 1780 | dev_warn(&pdev->dev, "failed to get firmware name\n"); |
6602b0dd FE |
1781 | else { |
1782 | ret = sdma_get_firmware(sdma, fw_name); | |
1783 | if (ret) | |
ad1122e5 | 1784 | dev_warn(&pdev->dev, "failed to get firmware from device tree\n"); |
580975d7 SG |
1785 | } |
1786 | } | |
5b28aa31 | 1787 | |
1ec1e82f SH |
1788 | sdma->dma_device.dev = &pdev->dev; |
1789 | ||
1790 | sdma->dma_device.device_alloc_chan_resources = sdma_alloc_chan_resources; | |
1791 | sdma->dma_device.device_free_chan_resources = sdma_free_chan_resources; | |
1792 | sdma->dma_device.device_tx_status = sdma_tx_status; | |
1793 | sdma->dma_device.device_prep_slave_sg = sdma_prep_slave_sg; | |
1794 | sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic; | |
7b350ab0 MR |
1795 | sdma->dma_device.device_config = sdma_config; |
1796 | sdma->dma_device.device_terminate_all = sdma_disable_channel; | |
1e4a4f50 FE |
1797 | sdma->dma_device.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); |
1798 | sdma->dma_device.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); | |
1799 | sdma->dma_device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); | |
1800 | sdma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; | |
1ec1e82f | 1801 | sdma->dma_device.device_issue_pending = sdma_issue_pending; |
b9b3f82f SH |
1802 | sdma->dma_device.dev->dma_parms = &sdma->dma_parms; |
1803 | dma_set_max_seg_size(sdma->dma_device.dev, 65535); | |
1ec1e82f | 1804 | |
23e11811 VR |
1805 | platform_set_drvdata(pdev, sdma); |
1806 | ||
1ec1e82f SH |
1807 | ret = dma_async_device_register(&sdma->dma_device); |
1808 | if (ret) { | |
1809 | dev_err(&pdev->dev, "unable to register\n"); | |
1810 | goto err_init; | |
1811 | } | |
1812 | ||
9479e17c SG |
1813 | if (np) { |
1814 | ret = of_dma_controller_register(np, sdma_xlate, sdma); | |
1815 | if (ret) { | |
1816 | dev_err(&pdev->dev, "failed to register controller\n"); | |
1817 | goto err_register; | |
1818 | } | |
8391ecf4 SW |
1819 | |
1820 | spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus"); | |
1821 | ret = of_address_to_resource(spba_bus, 0, &spba_res); | |
1822 | if (!ret) { | |
1823 | sdma->spba_start_addr = spba_res.start; | |
1824 | sdma->spba_end_addr = spba_res.end; | |
1825 | } | |
1826 | of_node_put(spba_bus); | |
9479e17c SG |
1827 | } |
1828 | ||
1ec1e82f SH |
1829 | return 0; |
1830 | ||
9479e17c SG |
1831 | err_register: |
1832 | dma_async_device_unregister(&sdma->dma_device); | |
1ec1e82f SH |
1833 | err_init: |
1834 | kfree(sdma->script_addrs); | |
939fd4f0 | 1835 | return ret; |
1ec1e82f SH |
1836 | } |
1837 | ||
1d1bbd30 | 1838 | static int sdma_remove(struct platform_device *pdev) |
1ec1e82f | 1839 | { |
23e11811 | 1840 | struct sdma_engine *sdma = platform_get_drvdata(pdev); |
c12fe497 | 1841 | int i; |
23e11811 VR |
1842 | |
1843 | dma_async_device_unregister(&sdma->dma_device); | |
1844 | kfree(sdma->script_addrs); | |
c12fe497 VR |
1845 | /* Kill the tasklet */ |
1846 | for (i = 0; i < MAX_DMA_CHANNELS; i++) { | |
1847 | struct sdma_channel *sdmac = &sdma->channel[i]; | |
1848 | ||
1849 | tasklet_kill(&sdmac->tasklet); | |
1850 | } | |
23e11811 VR |
1851 | |
1852 | platform_set_drvdata(pdev, NULL); | |
23e11811 | 1853 | return 0; |
1ec1e82f SH |
1854 | } |
1855 | ||
1856 | static struct platform_driver sdma_driver = { | |
1857 | .driver = { | |
1858 | .name = "imx-sdma", | |
580975d7 | 1859 | .of_match_table = sdma_dt_ids, |
1ec1e82f | 1860 | }, |
62550cd7 | 1861 | .id_table = sdma_devtypes, |
1d1bbd30 | 1862 | .remove = sdma_remove, |
23e11811 | 1863 | .probe = sdma_probe, |
1ec1e82f SH |
1864 | }; |
1865 | ||
23e11811 | 1866 | module_platform_driver(sdma_driver); |
1ec1e82f SH |
1867 | |
1868 | MODULE_AUTHOR("Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>"); | |
1869 | MODULE_DESCRIPTION("i.MX SDMA driver"); | |
1870 | MODULE_LICENSE("GPL"); |