1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // drivers/dma/imx-sdma.c |
4 | // |
5 | // This file contains a driver for the Freescale Smart DMA engine |
6 | // |
7 | // Copyright 2010 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de> |
8 | // |
9 | // Based on code from Freescale: |
10 | // |
11 | // Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved. |
12 | |
13 | #include <linux/init.h> |
14 | #include <linux/iopoll.h> |
15 | #include <linux/module.h> |
16 | #include <linux/types.h> |
17 | #include <linux/bitfield.h> |
18 | #include <linux/bitops.h> |
19 | #include <linux/mm.h> |
20 | #include <linux/interrupt.h> |
21 | #include <linux/clk.h> |
22 | #include <linux/delay.h> |
23 | #include <linux/sched.h> |
24 | #include <linux/semaphore.h> |
25 | #include <linux/spinlock.h> |
26 | #include <linux/device.h> |
27 | #include <linux/dma-mapping.h> |
28 | #include <linux/firmware.h> |
29 | #include <linux/slab.h> |
30 | #include <linux/platform_device.h> |
31 | #include <linux/dmaengine.h> |
32 | #include <linux/of.h> |
33 | #include <linux/of_address.h> |
34 | #include <linux/of_dma.h> |
35 | #include <linux/workqueue.h> |
36 | |
37 | #include <asm/irq.h> |
38 | #include <linux/dma/imx-dma.h> |
39 | #include <linux/regmap.h> |
40 | #include <linux/mfd/syscon.h> |
41 | #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> |
42 | |
43 | #include "dmaengine.h" |
44 | #include "virt-dma.h" |
45 | |
46 | /* SDMA registers */ |
47 | #define SDMA_H_C0PTR 0x000 |
48 | #define SDMA_H_INTR 0x004 |
49 | #define SDMA_H_STATSTOP 0x008 |
50 | #define SDMA_H_START 0x00c |
51 | #define SDMA_H_EVTOVR 0x010 |
52 | #define SDMA_H_DSPOVR 0x014 |
53 | #define SDMA_H_HOSTOVR 0x018 |
54 | #define SDMA_H_EVTPEND 0x01c |
55 | #define SDMA_H_DSPENBL 0x020 |
56 | #define SDMA_H_RESET 0x024 |
57 | #define SDMA_H_EVTERR 0x028 |
58 | #define SDMA_H_INTRMSK 0x02c |
59 | #define SDMA_H_PSW 0x030 |
60 | #define SDMA_H_EVTERRDBG 0x034 |
61 | #define SDMA_H_CONFIG 0x038 |
62 | #define SDMA_ONCE_ENB 0x040 |
63 | #define SDMA_ONCE_DATA 0x044 |
64 | #define SDMA_ONCE_INSTR 0x048 |
65 | #define SDMA_ONCE_STAT 0x04c |
66 | #define SDMA_ONCE_CMD 0x050 |
67 | #define SDMA_EVT_MIRROR 0x054 |
68 | #define SDMA_ILLINSTADDR 0x058 |
69 | #define SDMA_CHN0ADDR 0x05c |
70 | #define SDMA_ONCE_RTB 0x060 |
71 | #define SDMA_XTRIG_CONF1 0x070 |
72 | #define SDMA_XTRIG_CONF2 0x074 |
73 | #define SDMA_CHNENBL0_IMX35 0x200 |
74 | #define SDMA_CHNENBL0_IMX31 0x080 |
75 | #define SDMA_CHNPRI_0 0x100 |
76 | #define SDMA_DONE0_CONFIG 0x1000 |
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 | * p_2_p watermark_level description |
128 | * Bits Name Description |
129 | * 0-7 Lower WML Lower watermark level |
130 | * 8 PS 1: Pad Swallowing |
131 | * 0: No Pad Swallowing |
132 | * 9 PA 1: Pad Adding |
133 | * 0: No Pad Adding |
134 | * 10 SPDIF If this bit is set both source |
135 | * and destination are on SPBA |
136 | * 11 Source Bit(SP) 1: Source on SPBA |
137 | * 0: Source on AIPS |
138 | * 12 Destination Bit(DP) 1: Destination on SPBA |
139 | * 0: Destination on AIPS |
140 | * 13-15 --------- MUST BE 0 |
141 | * 16-23 Higher WML HWML |
142 | * 24-27 N Total number of samples after |
143 | * which Pad adding/Swallowing |
144 | * must be done. It must be odd. |
145 | * 28 Lower WML Event(LWE) SDMA events reg to check for |
146 | * LWML event mask |
147 | * 0: LWE in EVENTS register |
148 | * 1: LWE in EVENTS2 register |
149 | * 29 Higher WML Event(HWE) SDMA events reg to check for |
150 | * HWML event mask |
151 | * 0: HWE in EVENTS register |
152 | * 1: HWE in EVENTS2 register |
153 | * 30 --------- MUST BE 0 |
154 | * 31 CONT 1: Amount of samples to be |
155 | * transferred is unknown and |
156 | * script will keep on |
157 | * transferring samples as long as |
158 | * both events are detected and |
159 | * script must be manually stopped |
160 | * by the application |
161 | * 0: The amount of samples to be |
162 | * transferred is equal to the |
163 | * count field of mode word |
164 | */ |
165 | #define SDMA_WATERMARK_LEVEL_LWML 0xFF |
166 | #define SDMA_WATERMARK_LEVEL_PS BIT(8) |
167 | #define SDMA_WATERMARK_LEVEL_PA BIT(9) |
168 | #define SDMA_WATERMARK_LEVEL_SPDIF BIT(10) |
169 | #define SDMA_WATERMARK_LEVEL_SP BIT(11) |
170 | #define SDMA_WATERMARK_LEVEL_DP BIT(12) |
171 | #define SDMA_WATERMARK_LEVEL_HWML (0xFF << 16) |
172 | #define SDMA_WATERMARK_LEVEL_LWE BIT(28) |
173 | #define SDMA_WATERMARK_LEVEL_HWE BIT(29) |
174 | #define SDMA_WATERMARK_LEVEL_CONT BIT(31) |
175 | |
176 | #define SDMA_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ |
177 | BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ |
178 | BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) |
179 | |
180 | #define SDMA_DMA_DIRECTIONS (BIT(DMA_DEV_TO_MEM) | \ |
181 | BIT(DMA_MEM_TO_DEV) | \ |
182 | BIT(DMA_DEV_TO_DEV)) |
183 | |
184 | #define SDMA_WATERMARK_LEVEL_N_FIFOS GENMASK(15, 12) |
185 | #define SDMA_WATERMARK_LEVEL_OFF_FIFOS GENMASK(19, 16) |
186 | #define SDMA_WATERMARK_LEVEL_WORDS_PER_FIFO GENMASK(31, 28) |
187 | #define SDMA_WATERMARK_LEVEL_SW_DONE BIT(23) |
188 | |
189 | #define SDMA_DONE0_CONFIG_DONE_SEL BIT(7) |
190 | #define SDMA_DONE0_CONFIG_DONE_DIS BIT(6) |
191 | |
192 | /* |
193 | * struct sdma_script_start_addrs - SDMA script start pointers |
194 | * |
195 | * start addresses of the different functions in the physical |
196 | * address space of the SDMA engine. |
197 | */ |
198 | struct sdma_script_start_addrs { |
199 | s32 ap_2_ap_addr; |
200 | s32 ap_2_bp_addr; |
201 | s32 ap_2_ap_fixed_addr; |
202 | s32 bp_2_ap_addr; |
203 | s32 loopback_on_dsp_side_addr; |
204 | s32 mcu_interrupt_only_addr; |
205 | s32 firi_2_per_addr; |
206 | s32 firi_2_mcu_addr; |
207 | s32 per_2_firi_addr; |
208 | s32 mcu_2_firi_addr; |
209 | s32 uart_2_per_addr; |
210 | s32 uart_2_mcu_addr; |
211 | s32 per_2_app_addr; |
212 | s32 mcu_2_app_addr; |
213 | s32 per_2_per_addr; |
214 | s32 uartsh_2_per_addr; |
215 | s32 uartsh_2_mcu_addr; |
216 | s32 per_2_shp_addr; |
217 | s32 mcu_2_shp_addr; |
218 | s32 ata_2_mcu_addr; |
219 | s32 mcu_2_ata_addr; |
220 | s32 app_2_per_addr; |
221 | s32 app_2_mcu_addr; |
222 | s32 shp_2_per_addr; |
223 | s32 shp_2_mcu_addr; |
224 | s32 mshc_2_mcu_addr; |
225 | s32 mcu_2_mshc_addr; |
226 | s32 spdif_2_mcu_addr; |
227 | s32 mcu_2_spdif_addr; |
228 | s32 asrc_2_mcu_addr; |
229 | s32 ext_mem_2_ipu_addr; |
230 | s32 descrambler_addr; |
231 | s32 dptc_dvfs_addr; |
232 | s32 utra_addr; |
233 | s32 ram_code_start_addr; |
234 | /* End of v1 array */ |
235 | s32 mcu_2_ssish_addr; |
236 | s32 ssish_2_mcu_addr; |
237 | s32 hdmi_dma_addr; |
238 | /* End of v2 array */ |
239 | s32 zcanfd_2_mcu_addr; |
240 | s32 zqspi_2_mcu_addr; |
241 | s32 mcu_2_ecspi_addr; |
242 | s32 mcu_2_sai_addr; |
243 | s32 sai_2_mcu_addr; |
244 | s32 uart_2_mcu_rom_addr; |
245 | s32 uartsh_2_mcu_rom_addr; |
246 | /* End of v3 array */ |
247 | s32 mcu_2_zqspi_addr; |
248 | /* End of v4 array */ |
249 | }; |
250 | |
251 | /* |
252 | * Mode/Count of data node descriptors - IPCv2 |
253 | */ |
254 | struct sdma_mode_count { |
255 | #define SDMA_BD_MAX_CNT 0xffff |
256 | u32 count : 16; /* size of the buffer pointed by this BD */ |
257 | u32 status : 8; /* E,R,I,C,W,D status bits stored here */ |
258 | u32 command : 8; /* command mostly used for channel 0 */ |
259 | }; |
260 | |
261 | /* |
262 | * Buffer descriptor |
263 | */ |
264 | struct sdma_buffer_descriptor { |
265 | struct sdma_mode_count mode; |
266 | u32 buffer_addr; /* address of the buffer described */ |
267 | u32 ext_buffer_addr; /* extended buffer address */ |
268 | } __attribute__ ((packed)); |
269 | |
270 | /** |
271 | * struct sdma_channel_control - Channel control Block |
272 | * |
273 | * @current_bd_ptr: current buffer descriptor processed |
274 | * @base_bd_ptr: first element of buffer descriptor array |
275 | * @unused: padding. The SDMA engine expects an array of 128 byte |
276 | * control blocks |
277 | */ |
278 | struct sdma_channel_control { |
279 | u32 current_bd_ptr; |
280 | u32 base_bd_ptr; |
281 | u32 unused[2]; |
282 | } __attribute__ ((packed)); |
283 | |
284 | /** |
285 | * struct sdma_state_registers - SDMA context for a channel |
286 | * |
287 | * @pc: program counter |
288 | * @unused1: unused |
289 | * @t: test bit: status of arithmetic & test instruction |
290 | * @rpc: return program counter |
291 | * @unused0: unused |
292 | * @sf: source fault while loading data |
293 | * @spc: loop start program counter |
294 | * @unused2: unused |
295 | * @df: destination fault while storing data |
296 | * @epc: loop end program counter |
297 | * @lm: loop mode |
298 | */ |
299 | struct sdma_state_registers { |
300 | u32 pc :14; |
301 | u32 unused1: 1; |
302 | u32 t : 1; |
303 | u32 rpc :14; |
304 | u32 unused0: 1; |
305 | u32 sf : 1; |
306 | u32 spc :14; |
307 | u32 unused2: 1; |
308 | u32 df : 1; |
309 | u32 epc :14; |
310 | u32 lm : 2; |
311 | } __attribute__ ((packed)); |
312 | |
313 | /** |
314 | * struct sdma_context_data - sdma context specific to a channel |
315 | * |
316 | * @channel_state: channel state bits |
317 | * @gReg: general registers |
318 | * @mda: burst dma destination address register |
319 | * @msa: burst dma source address register |
320 | * @ms: burst dma status register |
321 | * @md: burst dma data register |
322 | * @pda: peripheral dma destination address register |
323 | * @psa: peripheral dma source address register |
324 | * @ps: peripheral dma status register |
325 | * @pd: peripheral dma data register |
326 | * @ca: CRC polynomial register |
327 | * @cs: CRC accumulator register |
328 | * @dda: dedicated core destination address register |
329 | * @dsa: dedicated core source address register |
330 | * @ds: dedicated core status register |
331 | * @dd: dedicated core data register |
332 | * @scratch0: 1st word of dedicated ram for context switch |
333 | * @scratch1: 2nd word of dedicated ram for context switch |
334 | * @scratch2: 3rd word of dedicated ram for context switch |
335 | * @scratch3: 4th word of dedicated ram for context switch |
336 | * @scratch4: 5th word of dedicated ram for context switch |
337 | * @scratch5: 6th word of dedicated ram for context switch |
338 | * @scratch6: 7th word of dedicated ram for context switch |
339 | * @scratch7: 8th word of dedicated ram for context switch |
340 | */ |
341 | struct sdma_context_data { |
342 | struct sdma_state_registers channel_state; |
343 | u32 gReg[8]; |
344 | u32 mda; |
345 | u32 msa; |
346 | u32 ms; |
347 | u32 md; |
348 | u32 pda; |
349 | u32 psa; |
350 | u32 ps; |
351 | u32 pd; |
352 | u32 ca; |
353 | u32 cs; |
354 | u32 dda; |
355 | u32 dsa; |
356 | u32 ds; |
357 | u32 dd; |
358 | u32 scratch0; |
359 | u32 scratch1; |
360 | u32 scratch2; |
361 | u32 scratch3; |
362 | u32 scratch4; |
363 | u32 scratch5; |
364 | u32 scratch6; |
365 | u32 scratch7; |
366 | } __attribute__ ((packed)); |
367 | |
368 | |
369 | struct sdma_engine; |
370 | |
371 | /** |
372 | * struct sdma_desc - descriptor structor for one transfer |
373 | * @vd: descriptor for virt dma |
374 | * @num_bd: number of descriptors currently handling |
375 | * @bd_phys: physical address of bd |
376 | * @buf_tail: ID of the buffer that was processed |
377 | * @buf_ptail: ID of the previous buffer that was processed |
378 | * @period_len: period length, used in cyclic. |
379 | * @chn_real_count: the real count updated from bd->mode.count |
380 | * @chn_count: the transfer count set |
381 | * @sdmac: sdma_channel pointer |
382 | * @bd: pointer of allocate bd |
383 | */ |
384 | struct sdma_desc { |
385 | struct virt_dma_desc vd; |
386 | unsigned int num_bd; |
387 | dma_addr_t bd_phys; |
388 | unsigned int buf_tail; |
389 | unsigned int buf_ptail; |
390 | unsigned int period_len; |
391 | unsigned int chn_real_count; |
392 | unsigned int chn_count; |
393 | struct sdma_channel *sdmac; |
394 | struct sdma_buffer_descriptor *bd; |
395 | }; |
396 | |
397 | /** |
398 | * struct sdma_channel - housekeeping for a SDMA channel |
399 | * |
400 | * @vc: virt_dma base structure |
401 | * @desc: sdma description including vd and other special member |
402 | * @sdma: pointer to the SDMA engine for this channel |
403 | * @channel: the channel number, matches dmaengine chan_id + 1 |
404 | * @direction: transfer type. Needed for setting SDMA script |
405 | * @slave_config: Slave configuration |
406 | * @peripheral_type: Peripheral type. Needed for setting SDMA script |
407 | * @event_id0: aka dma request line |
408 | * @event_id1: for channels that use 2 events |
409 | * @word_size: peripheral access size |
410 | * @pc_from_device: script address for those device_2_memory |
411 | * @pc_to_device: script address for those memory_2_device |
412 | * @device_to_device: script address for those device_2_device |
413 | * @pc_to_pc: script address for those memory_2_memory |
414 | * @flags: loop mode or not |
415 | * @per_address: peripheral source or destination address in common case |
416 | * destination address in p_2_p case |
417 | * @per_address2: peripheral source address in p_2_p case |
418 | * @event_mask: event mask used in p_2_p script |
419 | * @watermark_level: value for gReg[7], some script will extend it from |
420 | * basic watermark such as p_2_p |
421 | * @shp_addr: value for gReg[6] |
422 | * @per_addr: value for gReg[2] |
423 | * @status: status of dma channel |
424 | * @data: specific sdma interface structure |
425 | * @terminate_worker: used to call back into terminate work function |
426 | * @terminated: terminated list |
427 | * @is_ram_script: flag for script in ram |
428 | * @n_fifos_src: number of source device fifos |
429 | * @n_fifos_dst: number of destination device fifos |
430 | * @sw_done: software done flag |
431 | * @stride_fifos_src: stride for source device FIFOs |
432 | * @stride_fifos_dst: stride for destination device FIFOs |
433 | * @words_per_fifo: copy number of words one time for one FIFO |
434 | */ |
435 | struct sdma_channel { |
436 | struct virt_dma_chan vc; |
437 | struct sdma_desc *desc; |
438 | struct sdma_engine *sdma; |
439 | unsigned int channel; |
440 | enum dma_transfer_direction direction; |
441 | struct dma_slave_config slave_config; |
442 | enum sdma_peripheral_type peripheral_type; |
443 | unsigned int event_id0; |
444 | unsigned int event_id1; |
445 | enum dma_slave_buswidth word_size; |
446 | unsigned int pc_from_device, pc_to_device; |
447 | unsigned int device_to_device; |
448 | unsigned int pc_to_pc; |
449 | unsigned long flags; |
450 | dma_addr_t per_address, per_address2; |
451 | unsigned long event_mask[2]; |
452 | unsigned long watermark_level; |
453 | u32 shp_addr, per_addr; |
454 | enum dma_status status; |
455 | struct imx_dma_data data; |
456 | struct work_struct terminate_worker; |
457 | struct list_head terminated; |
458 | bool is_ram_script; |
459 | unsigned int n_fifos_src; |
460 | unsigned int n_fifos_dst; |
461 | unsigned int stride_fifos_src; |
462 | unsigned int stride_fifos_dst; |
463 | unsigned int words_per_fifo; |
464 | bool sw_done; |
465 | }; |
466 | |
467 | #define IMX_DMA_SG_LOOP BIT(0) |
468 | |
469 | #define MAX_DMA_CHANNELS 32 |
470 | #define MXC_SDMA_DEFAULT_PRIORITY 1 |
471 | #define MXC_SDMA_MIN_PRIORITY 1 |
472 | #define MXC_SDMA_MAX_PRIORITY 7 |
473 | |
474 | #define SDMA_FIRMWARE_MAGIC 0x414d4453 |
475 | |
476 | /** |
477 | * struct sdma_firmware_header - Layout of the firmware image |
478 | * |
479 | * @magic: "SDMA" |
480 | * @version_major: increased whenever layout of struct |
481 | * sdma_script_start_addrs changes. |
482 | * @version_minor: firmware minor version (for binary compatible changes) |
483 | * @script_addrs_start: offset of struct sdma_script_start_addrs in this image |
484 | * @num_script_addrs: Number of script addresses in this image |
485 | * @ram_code_start: offset of SDMA ram image in this firmware image |
486 | * @ram_code_size: size of SDMA ram image |
487 | */ |
488 | struct { |
489 | u32 ; |
490 | u32 ; |
491 | u32 ; |
492 | u32 ; |
493 | u32 ; |
494 | u32 ; |
495 | u32 ; |
496 | }; |
497 | |
498 | struct sdma_driver_data { |
499 | int chnenbl0; |
500 | int num_events; |
501 | struct sdma_script_start_addrs *script_addrs; |
502 | bool check_ratio; |
503 | /* |
504 | * ecspi ERR009165 fixed should be done in sdma script |
505 | * and it has been fixed in soc from i.mx6ul. |
506 | * please get more information from the below link: |
507 | * https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf |
508 | */ |
509 | bool ecspi_fixed; |
510 | }; |
511 | |
512 | struct sdma_engine { |
513 | struct device *dev; |
514 | struct sdma_channel channel[MAX_DMA_CHANNELS]; |
515 | struct sdma_channel_control *channel_control; |
516 | void __iomem *regs; |
517 | struct sdma_context_data *context; |
518 | dma_addr_t context_phys; |
519 | struct dma_device dma_device; |
520 | struct clk *clk_ipg; |
521 | struct clk *clk_ahb; |
522 | spinlock_t channel_0_lock; |
523 | u32 script_number; |
524 | struct sdma_script_start_addrs *script_addrs; |
525 | const struct sdma_driver_data *drvdata; |
526 | u32 spba_start_addr; |
527 | u32 spba_end_addr; |
528 | unsigned int irq; |
529 | dma_addr_t bd0_phys; |
530 | struct sdma_buffer_descriptor *bd0; |
531 | /* clock ratio for AHB:SDMA core. 1:1 is 1, 2:1 is 0*/ |
532 | bool clk_ratio; |
533 | bool fw_loaded; |
534 | }; |
535 | |
536 | static int sdma_config_write(struct dma_chan *chan, |
537 | struct dma_slave_config *dmaengine_cfg, |
538 | enum dma_transfer_direction direction); |
539 | |
540 | static struct sdma_driver_data sdma_imx31 = { |
541 | .chnenbl0 = SDMA_CHNENBL0_IMX31, |
542 | .num_events = 32, |
543 | }; |
544 | |
545 | static struct sdma_script_start_addrs sdma_script_imx25 = { |
546 | .ap_2_ap_addr = 729, |
547 | .uart_2_mcu_addr = 904, |
548 | .per_2_app_addr = 1255, |
549 | .mcu_2_app_addr = 834, |
550 | .uartsh_2_mcu_addr = 1120, |
551 | .per_2_shp_addr = 1329, |
552 | .mcu_2_shp_addr = 1048, |
553 | .ata_2_mcu_addr = 1560, |
554 | .mcu_2_ata_addr = 1479, |
555 | .app_2_per_addr = 1189, |
556 | .app_2_mcu_addr = 770, |
557 | .shp_2_per_addr = 1407, |
558 | .shp_2_mcu_addr = 979, |
559 | }; |
560 | |
561 | static struct sdma_driver_data sdma_imx25 = { |
562 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
563 | .num_events = 48, |
564 | .script_addrs = &sdma_script_imx25, |
565 | }; |
566 | |
567 | static struct sdma_driver_data sdma_imx35 = { |
568 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
569 | .num_events = 48, |
570 | }; |
571 | |
572 | static struct sdma_script_start_addrs sdma_script_imx51 = { |
573 | .ap_2_ap_addr = 642, |
574 | .uart_2_mcu_addr = 817, |
575 | .mcu_2_app_addr = 747, |
576 | .mcu_2_shp_addr = 961, |
577 | .ata_2_mcu_addr = 1473, |
578 | .mcu_2_ata_addr = 1392, |
579 | .app_2_per_addr = 1033, |
580 | .app_2_mcu_addr = 683, |
581 | .shp_2_per_addr = 1251, |
582 | .shp_2_mcu_addr = 892, |
583 | }; |
584 | |
585 | static struct sdma_driver_data sdma_imx51 = { |
586 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
587 | .num_events = 48, |
588 | .script_addrs = &sdma_script_imx51, |
589 | }; |
590 | |
591 | static struct sdma_script_start_addrs sdma_script_imx53 = { |
592 | .ap_2_ap_addr = 642, |
593 | .app_2_mcu_addr = 683, |
594 | .mcu_2_app_addr = 747, |
595 | .uart_2_mcu_addr = 817, |
596 | .shp_2_mcu_addr = 891, |
597 | .mcu_2_shp_addr = 960, |
598 | .uartsh_2_mcu_addr = 1032, |
599 | .spdif_2_mcu_addr = 1100, |
600 | .mcu_2_spdif_addr = 1134, |
601 | .firi_2_mcu_addr = 1193, |
602 | .mcu_2_firi_addr = 1290, |
603 | }; |
604 | |
605 | static struct sdma_driver_data sdma_imx53 = { |
606 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
607 | .num_events = 48, |
608 | .script_addrs = &sdma_script_imx53, |
609 | }; |
610 | |
611 | static struct sdma_script_start_addrs sdma_script_imx6q = { |
612 | .ap_2_ap_addr = 642, |
613 | .uart_2_mcu_addr = 817, |
614 | .mcu_2_app_addr = 747, |
615 | .per_2_per_addr = 6331, |
616 | .uartsh_2_mcu_addr = 1032, |
617 | .mcu_2_shp_addr = 960, |
618 | .app_2_mcu_addr = 683, |
619 | .shp_2_mcu_addr = 891, |
620 | .spdif_2_mcu_addr = 1100, |
621 | .mcu_2_spdif_addr = 1134, |
622 | }; |
623 | |
624 | static struct sdma_driver_data sdma_imx6q = { |
625 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
626 | .num_events = 48, |
627 | .script_addrs = &sdma_script_imx6q, |
628 | }; |
629 | |
630 | static struct sdma_driver_data sdma_imx6ul = { |
631 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
632 | .num_events = 48, |
633 | .script_addrs = &sdma_script_imx6q, |
634 | .ecspi_fixed = true, |
635 | }; |
636 | |
637 | static struct sdma_script_start_addrs sdma_script_imx7d = { |
638 | .ap_2_ap_addr = 644, |
639 | .uart_2_mcu_addr = 819, |
640 | .mcu_2_app_addr = 749, |
641 | .uartsh_2_mcu_addr = 1034, |
642 | .mcu_2_shp_addr = 962, |
643 | .app_2_mcu_addr = 685, |
644 | .shp_2_mcu_addr = 893, |
645 | .spdif_2_mcu_addr = 1102, |
646 | .mcu_2_spdif_addr = 1136, |
647 | }; |
648 | |
649 | static struct sdma_driver_data sdma_imx7d = { |
650 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
651 | .num_events = 48, |
652 | .script_addrs = &sdma_script_imx7d, |
653 | }; |
654 | |
655 | static struct sdma_driver_data sdma_imx8mq = { |
656 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
657 | .num_events = 48, |
658 | .script_addrs = &sdma_script_imx7d, |
659 | .check_ratio = 1, |
660 | }; |
661 | |
662 | static const struct of_device_id sdma_dt_ids[] = { |
663 | { .compatible = "fsl,imx6q-sdma" , .data = &sdma_imx6q, }, |
664 | { .compatible = "fsl,imx53-sdma" , .data = &sdma_imx53, }, |
665 | { .compatible = "fsl,imx51-sdma" , .data = &sdma_imx51, }, |
666 | { .compatible = "fsl,imx35-sdma" , .data = &sdma_imx35, }, |
667 | { .compatible = "fsl,imx31-sdma" , .data = &sdma_imx31, }, |
668 | { .compatible = "fsl,imx25-sdma" , .data = &sdma_imx25, }, |
669 | { .compatible = "fsl,imx7d-sdma" , .data = &sdma_imx7d, }, |
670 | { .compatible = "fsl,imx6ul-sdma" , .data = &sdma_imx6ul, }, |
671 | { .compatible = "fsl,imx8mq-sdma" , .data = &sdma_imx8mq, }, |
672 | { /* sentinel */ } |
673 | }; |
674 | MODULE_DEVICE_TABLE(of, sdma_dt_ids); |
675 | |
676 | #define SDMA_H_CONFIG_DSPDMA BIT(12) /* indicates if the DSPDMA is used */ |
677 | #define SDMA_H_CONFIG_RTD_PINS BIT(11) /* indicates if Real-Time Debug pins are enabled */ |
678 | #define SDMA_H_CONFIG_ACR BIT(4) /* indicates if AHB freq /core freq = 2 or 1 */ |
679 | #define SDMA_H_CONFIG_CSM (3) /* indicates which context switch mode is selected*/ |
680 | |
681 | static inline u32 chnenbl_ofs(struct sdma_engine *sdma, unsigned int event) |
682 | { |
683 | u32 chnenbl0 = sdma->drvdata->chnenbl0; |
684 | return chnenbl0 + event * 4; |
685 | } |
686 | |
687 | static int sdma_config_ownership(struct sdma_channel *sdmac, |
688 | bool event_override, bool mcu_override, bool dsp_override) |
689 | { |
690 | struct sdma_engine *sdma = sdmac->sdma; |
691 | int channel = sdmac->channel; |
692 | unsigned long evt, mcu, dsp; |
693 | |
694 | if (event_override && mcu_override && dsp_override) |
695 | return -EINVAL; |
696 | |
697 | evt = readl_relaxed(sdma->regs + SDMA_H_EVTOVR); |
698 | mcu = readl_relaxed(sdma->regs + SDMA_H_HOSTOVR); |
699 | dsp = readl_relaxed(sdma->regs + SDMA_H_DSPOVR); |
700 | |
701 | if (dsp_override) |
702 | __clear_bit(channel, &dsp); |
703 | else |
704 | __set_bit(channel, &dsp); |
705 | |
706 | if (event_override) |
707 | __clear_bit(channel, &evt); |
708 | else |
709 | __set_bit(channel, &evt); |
710 | |
711 | if (mcu_override) |
712 | __clear_bit(channel, &mcu); |
713 | else |
714 | __set_bit(channel, &mcu); |
715 | |
716 | writel_relaxed(evt, sdma->regs + SDMA_H_EVTOVR); |
717 | writel_relaxed(mcu, sdma->regs + SDMA_H_HOSTOVR); |
718 | writel_relaxed(dsp, sdma->regs + SDMA_H_DSPOVR); |
719 | |
720 | return 0; |
721 | } |
722 | |
723 | static int is_sdma_channel_enabled(struct sdma_engine *sdma, int channel) |
724 | { |
725 | return !!(readl(addr: sdma->regs + SDMA_H_STATSTOP) & BIT(channel)); |
726 | } |
727 | |
728 | static void sdma_enable_channel(struct sdma_engine *sdma, int channel) |
729 | { |
730 | writel(BIT(channel), addr: sdma->regs + SDMA_H_START); |
731 | } |
732 | |
733 | /* |
734 | * sdma_run_channel0 - run a channel and wait till it's done |
735 | */ |
736 | static int sdma_run_channel0(struct sdma_engine *sdma) |
737 | { |
738 | int ret; |
739 | u32 reg; |
740 | |
741 | sdma_enable_channel(sdma, channel: 0); |
742 | |
743 | ret = readl_relaxed_poll_timeout_atomic(sdma->regs + SDMA_H_STATSTOP, |
744 | reg, !(reg & 1), 1, 500); |
745 | if (ret) |
746 | dev_err(sdma->dev, "Timeout waiting for CH0 ready\n" ); |
747 | |
748 | /* Set bits of CONFIG register with dynamic context switching */ |
749 | reg = readl(addr: sdma->regs + SDMA_H_CONFIG); |
750 | if ((reg & SDMA_H_CONFIG_CSM) == 0) { |
751 | reg |= SDMA_H_CONFIG_CSM; |
752 | writel_relaxed(reg, sdma->regs + SDMA_H_CONFIG); |
753 | } |
754 | |
755 | return ret; |
756 | } |
757 | |
758 | static int sdma_load_script(struct sdma_engine *sdma, void *buf, int size, |
759 | u32 address) |
760 | { |
761 | struct sdma_buffer_descriptor *bd0 = sdma->bd0; |
762 | void *buf_virt; |
763 | dma_addr_t buf_phys; |
764 | int ret; |
765 | unsigned long flags; |
766 | |
767 | buf_virt = dma_alloc_coherent(dev: sdma->dev, size, dma_handle: &buf_phys, GFP_KERNEL); |
768 | if (!buf_virt) |
769 | return -ENOMEM; |
770 | |
771 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
772 | |
773 | bd0->mode.command = C0_SETPM; |
774 | bd0->mode.status = BD_DONE | BD_WRAP | BD_EXTD; |
775 | bd0->mode.count = size / 2; |
776 | bd0->buffer_addr = buf_phys; |
777 | bd0->ext_buffer_addr = address; |
778 | |
779 | memcpy(buf_virt, buf, size); |
780 | |
781 | ret = sdma_run_channel0(sdma); |
782 | |
783 | spin_unlock_irqrestore(lock: &sdma->channel_0_lock, flags); |
784 | |
785 | dma_free_coherent(dev: sdma->dev, size, cpu_addr: buf_virt, dma_handle: buf_phys); |
786 | |
787 | return ret; |
788 | } |
789 | |
790 | static void sdma_event_enable(struct sdma_channel *sdmac, unsigned int event) |
791 | { |
792 | struct sdma_engine *sdma = sdmac->sdma; |
793 | int channel = sdmac->channel; |
794 | unsigned long val; |
795 | u32 chnenbl = chnenbl_ofs(sdma, event); |
796 | |
797 | val = readl_relaxed(sdma->regs + chnenbl); |
798 | __set_bit(channel, &val); |
799 | writel_relaxed(val, sdma->regs + chnenbl); |
800 | |
801 | /* Set SDMA_DONEx_CONFIG is sw_done enabled */ |
802 | if (sdmac->sw_done) { |
803 | val = readl_relaxed(sdma->regs + SDMA_DONE0_CONFIG); |
804 | val |= SDMA_DONE0_CONFIG_DONE_SEL; |
805 | val &= ~SDMA_DONE0_CONFIG_DONE_DIS; |
806 | writel_relaxed(val, sdma->regs + SDMA_DONE0_CONFIG); |
807 | } |
808 | } |
809 | |
810 | static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event) |
811 | { |
812 | struct sdma_engine *sdma = sdmac->sdma; |
813 | int channel = sdmac->channel; |
814 | u32 chnenbl = chnenbl_ofs(sdma, event); |
815 | unsigned long val; |
816 | |
817 | val = readl_relaxed(sdma->regs + chnenbl); |
818 | __clear_bit(channel, &val); |
819 | writel_relaxed(val, sdma->regs + chnenbl); |
820 | } |
821 | |
822 | static struct sdma_desc *to_sdma_desc(struct dma_async_tx_descriptor *t) |
823 | { |
824 | return container_of(t, struct sdma_desc, vd.tx); |
825 | } |
826 | |
827 | static void sdma_start_desc(struct sdma_channel *sdmac) |
828 | { |
829 | struct virt_dma_desc *vd = vchan_next_desc(vc: &sdmac->vc); |
830 | struct sdma_desc *desc; |
831 | struct sdma_engine *sdma = sdmac->sdma; |
832 | int channel = sdmac->channel; |
833 | |
834 | if (!vd) { |
835 | sdmac->desc = NULL; |
836 | return; |
837 | } |
838 | sdmac->desc = desc = to_sdma_desc(t: &vd->tx); |
839 | |
840 | list_del(entry: &vd->node); |
841 | |
842 | sdma->channel_control[channel].base_bd_ptr = desc->bd_phys; |
843 | sdma->channel_control[channel].current_bd_ptr = desc->bd_phys; |
844 | sdma_enable_channel(sdma, channel: sdmac->channel); |
845 | } |
846 | |
847 | static void sdma_update_channel_loop(struct sdma_channel *sdmac) |
848 | { |
849 | struct sdma_buffer_descriptor *bd; |
850 | int error = 0; |
851 | enum dma_status old_status = sdmac->status; |
852 | |
853 | /* |
854 | * loop mode. Iterate over descriptors, re-setup them and |
855 | * call callback function. |
856 | */ |
857 | while (sdmac->desc) { |
858 | struct sdma_desc *desc = sdmac->desc; |
859 | |
860 | bd = &desc->bd[desc->buf_tail]; |
861 | |
862 | if (bd->mode.status & BD_DONE) |
863 | break; |
864 | |
865 | if (bd->mode.status & BD_RROR) { |
866 | bd->mode.status &= ~BD_RROR; |
867 | sdmac->status = DMA_ERROR; |
868 | error = -EIO; |
869 | } |
870 | |
871 | /* |
872 | * We use bd->mode.count to calculate the residue, since contains |
873 | * the number of bytes present in the current buffer descriptor. |
874 | */ |
875 | |
876 | desc->chn_real_count = bd->mode.count; |
877 | bd->mode.count = desc->period_len; |
878 | desc->buf_ptail = desc->buf_tail; |
879 | desc->buf_tail = (desc->buf_tail + 1) % desc->num_bd; |
880 | |
881 | /* |
882 | * The callback is called from the interrupt context in order |
883 | * to reduce latency and to avoid the risk of altering the |
884 | * SDMA transaction status by the time the client tasklet is |
885 | * executed. |
886 | */ |
887 | spin_unlock(lock: &sdmac->vc.lock); |
888 | dmaengine_desc_get_callback_invoke(tx: &desc->vd.tx, NULL); |
889 | spin_lock(lock: &sdmac->vc.lock); |
890 | |
891 | /* Assign buffer ownership to SDMA */ |
892 | bd->mode.status |= BD_DONE; |
893 | |
894 | if (error) |
895 | sdmac->status = old_status; |
896 | } |
897 | |
898 | /* |
899 | * SDMA stops cyclic channel when DMA request triggers a channel and no SDMA |
900 | * owned buffer is available (i.e. BD_DONE was set too late). |
901 | */ |
902 | if (sdmac->desc && !is_sdma_channel_enabled(sdma: sdmac->sdma, channel: sdmac->channel)) { |
903 | dev_warn(sdmac->sdma->dev, "restart cyclic channel %d\n" , sdmac->channel); |
904 | sdma_enable_channel(sdma: sdmac->sdma, channel: sdmac->channel); |
905 | } |
906 | } |
907 | |
908 | static void mxc_sdma_handle_channel_normal(struct sdma_channel *data) |
909 | { |
910 | struct sdma_channel *sdmac = (struct sdma_channel *) data; |
911 | struct sdma_buffer_descriptor *bd; |
912 | int i, error = 0; |
913 | |
914 | sdmac->desc->chn_real_count = 0; |
915 | /* |
916 | * non loop mode. Iterate over all descriptors, collect |
917 | * errors and call callback function |
918 | */ |
919 | for (i = 0; i < sdmac->desc->num_bd; i++) { |
920 | bd = &sdmac->desc->bd[i]; |
921 | |
922 | if (bd->mode.status & (BD_DONE | BD_RROR)) |
923 | error = -EIO; |
924 | sdmac->desc->chn_real_count += bd->mode.count; |
925 | } |
926 | |
927 | if (error) |
928 | sdmac->status = DMA_ERROR; |
929 | else |
930 | sdmac->status = DMA_COMPLETE; |
931 | } |
932 | |
933 | static irqreturn_t sdma_int_handler(int irq, void *dev_id) |
934 | { |
935 | struct sdma_engine *sdma = dev_id; |
936 | unsigned long stat; |
937 | |
938 | stat = readl_relaxed(sdma->regs + SDMA_H_INTR); |
939 | writel_relaxed(stat, sdma->regs + SDMA_H_INTR); |
940 | /* channel 0 is special and not handled here, see run_channel0() */ |
941 | stat &= ~1; |
942 | |
943 | while (stat) { |
944 | int channel = fls(x: stat) - 1; |
945 | struct sdma_channel *sdmac = &sdma->channel[channel]; |
946 | struct sdma_desc *desc; |
947 | |
948 | spin_lock(lock: &sdmac->vc.lock); |
949 | desc = sdmac->desc; |
950 | if (desc) { |
951 | if (sdmac->flags & IMX_DMA_SG_LOOP) { |
952 | if (sdmac->peripheral_type != IMX_DMATYPE_HDMI) |
953 | sdma_update_channel_loop(sdmac); |
954 | else |
955 | vchan_cyclic_callback(vd: &desc->vd); |
956 | } else { |
957 | mxc_sdma_handle_channel_normal(data: sdmac); |
958 | vchan_cookie_complete(vd: &desc->vd); |
959 | sdma_start_desc(sdmac); |
960 | } |
961 | } |
962 | |
963 | spin_unlock(lock: &sdmac->vc.lock); |
964 | __clear_bit(channel, &stat); |
965 | } |
966 | |
967 | return IRQ_HANDLED; |
968 | } |
969 | |
970 | /* |
971 | * sets the pc of SDMA script according to the peripheral type |
972 | */ |
973 | static int sdma_get_pc(struct sdma_channel *sdmac, |
974 | enum sdma_peripheral_type peripheral_type) |
975 | { |
976 | struct sdma_engine *sdma = sdmac->sdma; |
977 | int per_2_emi = 0, emi_2_per = 0; |
978 | /* |
979 | * These are needed once we start to support transfers between |
980 | * two peripherals or memory-to-memory transfers |
981 | */ |
982 | int per_2_per = 0, emi_2_emi = 0; |
983 | |
984 | sdmac->pc_from_device = 0; |
985 | sdmac->pc_to_device = 0; |
986 | sdmac->device_to_device = 0; |
987 | sdmac->pc_to_pc = 0; |
988 | sdmac->is_ram_script = false; |
989 | |
990 | switch (peripheral_type) { |
991 | case IMX_DMATYPE_MEMORY: |
992 | emi_2_emi = sdma->script_addrs->ap_2_ap_addr; |
993 | break; |
994 | case IMX_DMATYPE_DSP: |
995 | emi_2_per = sdma->script_addrs->bp_2_ap_addr; |
996 | per_2_emi = sdma->script_addrs->ap_2_bp_addr; |
997 | break; |
998 | case IMX_DMATYPE_FIRI: |
999 | per_2_emi = sdma->script_addrs->firi_2_mcu_addr; |
1000 | emi_2_per = sdma->script_addrs->mcu_2_firi_addr; |
1001 | break; |
1002 | case IMX_DMATYPE_UART: |
1003 | per_2_emi = sdma->script_addrs->uart_2_mcu_addr; |
1004 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; |
1005 | break; |
1006 | case IMX_DMATYPE_UART_SP: |
1007 | per_2_emi = sdma->script_addrs->uartsh_2_mcu_addr; |
1008 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; |
1009 | break; |
1010 | case IMX_DMATYPE_ATA: |
1011 | per_2_emi = sdma->script_addrs->ata_2_mcu_addr; |
1012 | emi_2_per = sdma->script_addrs->mcu_2_ata_addr; |
1013 | break; |
1014 | case IMX_DMATYPE_CSPI: |
1015 | per_2_emi = sdma->script_addrs->app_2_mcu_addr; |
1016 | |
1017 | /* Use rom script mcu_2_app if ERR009165 fixed */ |
1018 | if (sdmac->sdma->drvdata->ecspi_fixed) { |
1019 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; |
1020 | } else { |
1021 | emi_2_per = sdma->script_addrs->mcu_2_ecspi_addr; |
1022 | sdmac->is_ram_script = true; |
1023 | } |
1024 | |
1025 | break; |
1026 | case IMX_DMATYPE_EXT: |
1027 | case IMX_DMATYPE_SSI: |
1028 | case IMX_DMATYPE_SAI: |
1029 | per_2_emi = sdma->script_addrs->app_2_mcu_addr; |
1030 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; |
1031 | break; |
1032 | case IMX_DMATYPE_SSI_DUAL: |
1033 | per_2_emi = sdma->script_addrs->ssish_2_mcu_addr; |
1034 | emi_2_per = sdma->script_addrs->mcu_2_ssish_addr; |
1035 | sdmac->is_ram_script = true; |
1036 | break; |
1037 | case IMX_DMATYPE_SSI_SP: |
1038 | case IMX_DMATYPE_MMC: |
1039 | case IMX_DMATYPE_SDHC: |
1040 | case IMX_DMATYPE_CSPI_SP: |
1041 | case IMX_DMATYPE_ESAI: |
1042 | case IMX_DMATYPE_MSHC_SP: |
1043 | per_2_emi = sdma->script_addrs->shp_2_mcu_addr; |
1044 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; |
1045 | break; |
1046 | case IMX_DMATYPE_ASRC: |
1047 | per_2_emi = sdma->script_addrs->asrc_2_mcu_addr; |
1048 | emi_2_per = sdma->script_addrs->asrc_2_mcu_addr; |
1049 | per_2_per = sdma->script_addrs->per_2_per_addr; |
1050 | sdmac->is_ram_script = true; |
1051 | break; |
1052 | case IMX_DMATYPE_ASRC_SP: |
1053 | per_2_emi = sdma->script_addrs->shp_2_mcu_addr; |
1054 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; |
1055 | per_2_per = sdma->script_addrs->per_2_per_addr; |
1056 | break; |
1057 | case IMX_DMATYPE_MSHC: |
1058 | per_2_emi = sdma->script_addrs->mshc_2_mcu_addr; |
1059 | emi_2_per = sdma->script_addrs->mcu_2_mshc_addr; |
1060 | break; |
1061 | case IMX_DMATYPE_CCM: |
1062 | per_2_emi = sdma->script_addrs->dptc_dvfs_addr; |
1063 | break; |
1064 | case IMX_DMATYPE_SPDIF: |
1065 | per_2_emi = sdma->script_addrs->spdif_2_mcu_addr; |
1066 | emi_2_per = sdma->script_addrs->mcu_2_spdif_addr; |
1067 | break; |
1068 | case IMX_DMATYPE_IPU_MEMORY: |
1069 | emi_2_per = sdma->script_addrs->ext_mem_2_ipu_addr; |
1070 | break; |
1071 | case IMX_DMATYPE_MULTI_SAI: |
1072 | per_2_emi = sdma->script_addrs->sai_2_mcu_addr; |
1073 | emi_2_per = sdma->script_addrs->mcu_2_sai_addr; |
1074 | break; |
1075 | case IMX_DMATYPE_HDMI: |
1076 | emi_2_per = sdma->script_addrs->hdmi_dma_addr; |
1077 | sdmac->is_ram_script = true; |
1078 | break; |
1079 | default: |
1080 | dev_err(sdma->dev, "Unsupported transfer type %d\n" , |
1081 | peripheral_type); |
1082 | return -EINVAL; |
1083 | } |
1084 | |
1085 | sdmac->pc_from_device = per_2_emi; |
1086 | sdmac->pc_to_device = emi_2_per; |
1087 | sdmac->device_to_device = per_2_per; |
1088 | sdmac->pc_to_pc = emi_2_emi; |
1089 | |
1090 | return 0; |
1091 | } |
1092 | |
1093 | static int sdma_load_context(struct sdma_channel *sdmac) |
1094 | { |
1095 | struct sdma_engine *sdma = sdmac->sdma; |
1096 | int channel = sdmac->channel; |
1097 | int load_address; |
1098 | struct sdma_context_data *context = sdma->context; |
1099 | struct sdma_buffer_descriptor *bd0 = sdma->bd0; |
1100 | int ret; |
1101 | unsigned long flags; |
1102 | |
1103 | if (sdmac->direction == DMA_DEV_TO_MEM) |
1104 | load_address = sdmac->pc_from_device; |
1105 | else if (sdmac->direction == DMA_DEV_TO_DEV) |
1106 | load_address = sdmac->device_to_device; |
1107 | else if (sdmac->direction == DMA_MEM_TO_MEM) |
1108 | load_address = sdmac->pc_to_pc; |
1109 | else |
1110 | load_address = sdmac->pc_to_device; |
1111 | |
1112 | if (load_address < 0) |
1113 | return load_address; |
1114 | |
1115 | dev_dbg(sdma->dev, "load_address = %d\n" , load_address); |
1116 | dev_dbg(sdma->dev, "wml = 0x%08x\n" , (u32)sdmac->watermark_level); |
1117 | dev_dbg(sdma->dev, "shp_addr = 0x%08x\n" , sdmac->shp_addr); |
1118 | dev_dbg(sdma->dev, "per_addr = 0x%08x\n" , sdmac->per_addr); |
1119 | dev_dbg(sdma->dev, "event_mask0 = 0x%08x\n" , (u32)sdmac->event_mask[0]); |
1120 | dev_dbg(sdma->dev, "event_mask1 = 0x%08x\n" , (u32)sdmac->event_mask[1]); |
1121 | |
1122 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
1123 | |
1124 | memset(context, 0, sizeof(*context)); |
1125 | context->channel_state.pc = load_address; |
1126 | |
1127 | /* Send by context the event mask,base address for peripheral |
1128 | * and watermark level |
1129 | */ |
1130 | if (sdmac->peripheral_type == IMX_DMATYPE_HDMI) { |
1131 | context->gReg[4] = sdmac->per_addr; |
1132 | context->gReg[6] = sdmac->shp_addr; |
1133 | } else { |
1134 | context->gReg[0] = sdmac->event_mask[1]; |
1135 | context->gReg[1] = sdmac->event_mask[0]; |
1136 | context->gReg[2] = sdmac->per_addr; |
1137 | context->gReg[6] = sdmac->shp_addr; |
1138 | context->gReg[7] = sdmac->watermark_level; |
1139 | } |
1140 | |
1141 | bd0->mode.command = C0_SETDM; |
1142 | bd0->mode.status = BD_DONE | BD_WRAP | BD_EXTD; |
1143 | bd0->mode.count = sizeof(*context) / 4; |
1144 | bd0->buffer_addr = sdma->context_phys; |
1145 | bd0->ext_buffer_addr = 2048 + (sizeof(*context) / 4) * channel; |
1146 | ret = sdma_run_channel0(sdma); |
1147 | |
1148 | spin_unlock_irqrestore(lock: &sdma->channel_0_lock, flags); |
1149 | |
1150 | return ret; |
1151 | } |
1152 | |
1153 | static struct sdma_channel *to_sdma_chan(struct dma_chan *chan) |
1154 | { |
1155 | return container_of(chan, struct sdma_channel, vc.chan); |
1156 | } |
1157 | |
1158 | static int sdma_disable_channel(struct dma_chan *chan) |
1159 | { |
1160 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1161 | struct sdma_engine *sdma = sdmac->sdma; |
1162 | int channel = sdmac->channel; |
1163 | |
1164 | writel_relaxed(BIT(channel), sdma->regs + SDMA_H_STATSTOP); |
1165 | sdmac->status = DMA_ERROR; |
1166 | |
1167 | return 0; |
1168 | } |
1169 | static void sdma_channel_terminate_work(struct work_struct *work) |
1170 | { |
1171 | struct sdma_channel *sdmac = container_of(work, struct sdma_channel, |
1172 | terminate_worker); |
1173 | /* |
1174 | * According to NXP R&D team a delay of one BD SDMA cost time |
1175 | * (maximum is 1ms) should be added after disable of the channel |
1176 | * bit, to ensure SDMA core has really been stopped after SDMA |
1177 | * clients call .device_terminate_all. |
1178 | */ |
1179 | usleep_range(min: 1000, max: 2000); |
1180 | |
1181 | vchan_dma_desc_free_list(vc: &sdmac->vc, head: &sdmac->terminated); |
1182 | } |
1183 | |
1184 | static int sdma_terminate_all(struct dma_chan *chan) |
1185 | { |
1186 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1187 | unsigned long flags; |
1188 | |
1189 | spin_lock_irqsave(&sdmac->vc.lock, flags); |
1190 | |
1191 | sdma_disable_channel(chan); |
1192 | |
1193 | if (sdmac->desc) { |
1194 | vchan_terminate_vdesc(vd: &sdmac->desc->vd); |
1195 | /* |
1196 | * move out current descriptor into terminated list so that |
1197 | * it could be free in sdma_channel_terminate_work alone |
1198 | * later without potential involving next descriptor raised |
1199 | * up before the last descriptor terminated. |
1200 | */ |
1201 | vchan_get_all_descriptors(vc: &sdmac->vc, head: &sdmac->terminated); |
1202 | sdmac->desc = NULL; |
1203 | schedule_work(work: &sdmac->terminate_worker); |
1204 | } |
1205 | |
1206 | spin_unlock_irqrestore(lock: &sdmac->vc.lock, flags); |
1207 | |
1208 | return 0; |
1209 | } |
1210 | |
1211 | static void sdma_channel_synchronize(struct dma_chan *chan) |
1212 | { |
1213 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1214 | |
1215 | vchan_synchronize(vc: &sdmac->vc); |
1216 | |
1217 | flush_work(work: &sdmac->terminate_worker); |
1218 | } |
1219 | |
1220 | static void sdma_set_watermarklevel_for_p2p(struct sdma_channel *sdmac) |
1221 | { |
1222 | struct sdma_engine *sdma = sdmac->sdma; |
1223 | |
1224 | int lwml = sdmac->watermark_level & SDMA_WATERMARK_LEVEL_LWML; |
1225 | int hwml = (sdmac->watermark_level & SDMA_WATERMARK_LEVEL_HWML) >> 16; |
1226 | |
1227 | set_bit(nr: sdmac->event_id0 % 32, addr: &sdmac->event_mask[1]); |
1228 | set_bit(nr: sdmac->event_id1 % 32, addr: &sdmac->event_mask[0]); |
1229 | |
1230 | if (sdmac->event_id0 > 31) |
1231 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_LWE; |
1232 | |
1233 | if (sdmac->event_id1 > 31) |
1234 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_HWE; |
1235 | |
1236 | /* |
1237 | * If LWML(src_maxburst) > HWML(dst_maxburst), we need |
1238 | * swap LWML and HWML of INFO(A.3.2.5.1), also need swap |
1239 | * r0(event_mask[1]) and r1(event_mask[0]). |
1240 | */ |
1241 | if (lwml > hwml) { |
1242 | sdmac->watermark_level &= ~(SDMA_WATERMARK_LEVEL_LWML | |
1243 | SDMA_WATERMARK_LEVEL_HWML); |
1244 | sdmac->watermark_level |= hwml; |
1245 | sdmac->watermark_level |= lwml << 16; |
1246 | swap(sdmac->event_mask[0], sdmac->event_mask[1]); |
1247 | } |
1248 | |
1249 | if (sdmac->per_address2 >= sdma->spba_start_addr && |
1250 | sdmac->per_address2 <= sdma->spba_end_addr) |
1251 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_SP; |
1252 | |
1253 | if (sdmac->per_address >= sdma->spba_start_addr && |
1254 | sdmac->per_address <= sdma->spba_end_addr) |
1255 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_DP; |
1256 | |
1257 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_CONT; |
1258 | } |
1259 | |
1260 | static void sdma_set_watermarklevel_for_sais(struct sdma_channel *sdmac) |
1261 | { |
1262 | unsigned int n_fifos; |
1263 | unsigned int stride_fifos; |
1264 | unsigned int words_per_fifo; |
1265 | |
1266 | if (sdmac->sw_done) |
1267 | sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_SW_DONE; |
1268 | |
1269 | if (sdmac->direction == DMA_DEV_TO_MEM) { |
1270 | n_fifos = sdmac->n_fifos_src; |
1271 | stride_fifos = sdmac->stride_fifos_src; |
1272 | } else { |
1273 | n_fifos = sdmac->n_fifos_dst; |
1274 | stride_fifos = sdmac->stride_fifos_dst; |
1275 | } |
1276 | |
1277 | words_per_fifo = sdmac->words_per_fifo; |
1278 | |
1279 | sdmac->watermark_level |= |
1280 | FIELD_PREP(SDMA_WATERMARK_LEVEL_N_FIFOS, n_fifos); |
1281 | sdmac->watermark_level |= |
1282 | FIELD_PREP(SDMA_WATERMARK_LEVEL_OFF_FIFOS, stride_fifos); |
1283 | if (words_per_fifo) |
1284 | sdmac->watermark_level |= |
1285 | FIELD_PREP(SDMA_WATERMARK_LEVEL_WORDS_PER_FIFO, (words_per_fifo - 1)); |
1286 | } |
1287 | |
1288 | static int sdma_config_channel(struct dma_chan *chan) |
1289 | { |
1290 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1291 | int ret; |
1292 | |
1293 | sdma_disable_channel(chan); |
1294 | |
1295 | sdmac->event_mask[0] = 0; |
1296 | sdmac->event_mask[1] = 0; |
1297 | sdmac->shp_addr = 0; |
1298 | sdmac->per_addr = 0; |
1299 | |
1300 | switch (sdmac->peripheral_type) { |
1301 | case IMX_DMATYPE_DSP: |
1302 | sdma_config_ownership(sdmac, event_override: false, mcu_override: true, dsp_override: true); |
1303 | break; |
1304 | case IMX_DMATYPE_MEMORY: |
1305 | sdma_config_ownership(sdmac, event_override: false, mcu_override: true, dsp_override: false); |
1306 | break; |
1307 | default: |
1308 | sdma_config_ownership(sdmac, event_override: true, mcu_override: true, dsp_override: false); |
1309 | break; |
1310 | } |
1311 | |
1312 | ret = sdma_get_pc(sdmac, peripheral_type: sdmac->peripheral_type); |
1313 | if (ret) |
1314 | return ret; |
1315 | |
1316 | if ((sdmac->peripheral_type != IMX_DMATYPE_MEMORY) && |
1317 | (sdmac->peripheral_type != IMX_DMATYPE_DSP)) { |
1318 | /* Handle multiple event channels differently */ |
1319 | if (sdmac->event_id1) { |
1320 | if (sdmac->peripheral_type == IMX_DMATYPE_ASRC_SP || |
1321 | sdmac->peripheral_type == IMX_DMATYPE_ASRC) |
1322 | sdma_set_watermarklevel_for_p2p(sdmac); |
1323 | } else { |
1324 | if (sdmac->peripheral_type == |
1325 | IMX_DMATYPE_MULTI_SAI) |
1326 | sdma_set_watermarklevel_for_sais(sdmac); |
1327 | |
1328 | __set_bit(sdmac->event_id0, sdmac->event_mask); |
1329 | } |
1330 | |
1331 | /* Address */ |
1332 | sdmac->shp_addr = sdmac->per_address; |
1333 | sdmac->per_addr = sdmac->per_address2; |
1334 | } else { |
1335 | sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */ |
1336 | } |
1337 | |
1338 | return 0; |
1339 | } |
1340 | |
1341 | static int sdma_set_channel_priority(struct sdma_channel *sdmac, |
1342 | unsigned int priority) |
1343 | { |
1344 | struct sdma_engine *sdma = sdmac->sdma; |
1345 | int channel = sdmac->channel; |
1346 | |
1347 | if (priority < MXC_SDMA_MIN_PRIORITY |
1348 | || priority > MXC_SDMA_MAX_PRIORITY) { |
1349 | return -EINVAL; |
1350 | } |
1351 | |
1352 | writel_relaxed(priority, sdma->regs + SDMA_CHNPRI_0 + 4 * channel); |
1353 | |
1354 | return 0; |
1355 | } |
1356 | |
1357 | static int sdma_request_channel0(struct sdma_engine *sdma) |
1358 | { |
1359 | int ret = -EBUSY; |
1360 | |
1361 | sdma->bd0 = dma_alloc_coherent(dev: sdma->dev, PAGE_SIZE, dma_handle: &sdma->bd0_phys, |
1362 | GFP_NOWAIT); |
1363 | if (!sdma->bd0) { |
1364 | ret = -ENOMEM; |
1365 | goto out; |
1366 | } |
1367 | |
1368 | sdma->channel_control[0].base_bd_ptr = sdma->bd0_phys; |
1369 | sdma->channel_control[0].current_bd_ptr = sdma->bd0_phys; |
1370 | |
1371 | sdma_set_channel_priority(sdmac: &sdma->channel[0], MXC_SDMA_DEFAULT_PRIORITY); |
1372 | return 0; |
1373 | out: |
1374 | |
1375 | return ret; |
1376 | } |
1377 | |
1378 | |
1379 | static int sdma_alloc_bd(struct sdma_desc *desc) |
1380 | { |
1381 | u32 bd_size = desc->num_bd * sizeof(struct sdma_buffer_descriptor); |
1382 | int ret = 0; |
1383 | |
1384 | desc->bd = dma_alloc_coherent(dev: desc->sdmac->sdma->dev, size: bd_size, |
1385 | dma_handle: &desc->bd_phys, GFP_NOWAIT); |
1386 | if (!desc->bd) { |
1387 | ret = -ENOMEM; |
1388 | goto out; |
1389 | } |
1390 | out: |
1391 | return ret; |
1392 | } |
1393 | |
1394 | static void sdma_free_bd(struct sdma_desc *desc) |
1395 | { |
1396 | u32 bd_size = desc->num_bd * sizeof(struct sdma_buffer_descriptor); |
1397 | |
1398 | dma_free_coherent(dev: desc->sdmac->sdma->dev, size: bd_size, cpu_addr: desc->bd, |
1399 | dma_handle: desc->bd_phys); |
1400 | } |
1401 | |
1402 | static void sdma_desc_free(struct virt_dma_desc *vd) |
1403 | { |
1404 | struct sdma_desc *desc = container_of(vd, struct sdma_desc, vd); |
1405 | |
1406 | sdma_free_bd(desc); |
1407 | kfree(objp: desc); |
1408 | } |
1409 | |
1410 | static int sdma_alloc_chan_resources(struct dma_chan *chan) |
1411 | { |
1412 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1413 | struct imx_dma_data *data = chan->private; |
1414 | struct imx_dma_data mem_data; |
1415 | int prio, ret; |
1416 | |
1417 | /* |
1418 | * MEMCPY may never setup chan->private by filter function such as |
1419 | * dmatest, thus create 'struct imx_dma_data mem_data' for this case. |
1420 | * Please note in any other slave case, you have to setup chan->private |
1421 | * with 'struct imx_dma_data' in your own filter function if you want to |
1422 | * request dma channel by dma_request_channel() rather than |
1423 | * dma_request_slave_channel(). Othwise, 'MEMCPY in case?' will appear |
1424 | * to warn you to correct your filter function. |
1425 | */ |
1426 | if (!data) { |
1427 | dev_dbg(sdmac->sdma->dev, "MEMCPY in case?\n" ); |
1428 | mem_data.priority = 2; |
1429 | mem_data.peripheral_type = IMX_DMATYPE_MEMORY; |
1430 | mem_data.dma_request = 0; |
1431 | mem_data.dma_request2 = 0; |
1432 | data = &mem_data; |
1433 | |
1434 | ret = sdma_get_pc(sdmac, peripheral_type: IMX_DMATYPE_MEMORY); |
1435 | if (ret) |
1436 | return ret; |
1437 | } |
1438 | |
1439 | switch (data->priority) { |
1440 | case DMA_PRIO_HIGH: |
1441 | prio = 3; |
1442 | break; |
1443 | case DMA_PRIO_MEDIUM: |
1444 | prio = 2; |
1445 | break; |
1446 | case DMA_PRIO_LOW: |
1447 | default: |
1448 | prio = 1; |
1449 | break; |
1450 | } |
1451 | |
1452 | sdmac->peripheral_type = data->peripheral_type; |
1453 | sdmac->event_id0 = data->dma_request; |
1454 | sdmac->event_id1 = data->dma_request2; |
1455 | |
1456 | ret = clk_enable(clk: sdmac->sdma->clk_ipg); |
1457 | if (ret) |
1458 | return ret; |
1459 | ret = clk_enable(clk: sdmac->sdma->clk_ahb); |
1460 | if (ret) |
1461 | goto disable_clk_ipg; |
1462 | |
1463 | ret = sdma_set_channel_priority(sdmac, priority: prio); |
1464 | if (ret) |
1465 | goto disable_clk_ahb; |
1466 | |
1467 | return 0; |
1468 | |
1469 | disable_clk_ahb: |
1470 | clk_disable(clk: sdmac->sdma->clk_ahb); |
1471 | disable_clk_ipg: |
1472 | clk_disable(clk: sdmac->sdma->clk_ipg); |
1473 | return ret; |
1474 | } |
1475 | |
1476 | static void sdma_free_chan_resources(struct dma_chan *chan) |
1477 | { |
1478 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1479 | struct sdma_engine *sdma = sdmac->sdma; |
1480 | |
1481 | sdma_terminate_all(chan); |
1482 | |
1483 | sdma_channel_synchronize(chan); |
1484 | |
1485 | sdma_event_disable(sdmac, event: sdmac->event_id0); |
1486 | if (sdmac->event_id1) |
1487 | sdma_event_disable(sdmac, event: sdmac->event_id1); |
1488 | |
1489 | sdmac->event_id0 = 0; |
1490 | sdmac->event_id1 = 0; |
1491 | |
1492 | sdma_set_channel_priority(sdmac, priority: 0); |
1493 | |
1494 | clk_disable(clk: sdma->clk_ipg); |
1495 | clk_disable(clk: sdma->clk_ahb); |
1496 | } |
1497 | |
1498 | static struct sdma_desc *sdma_transfer_init(struct sdma_channel *sdmac, |
1499 | enum dma_transfer_direction direction, u32 bds) |
1500 | { |
1501 | struct sdma_desc *desc; |
1502 | |
1503 | if (!sdmac->sdma->fw_loaded && sdmac->is_ram_script) { |
1504 | dev_warn_once(sdmac->sdma->dev, "sdma firmware not ready!\n" ); |
1505 | goto err_out; |
1506 | } |
1507 | |
1508 | desc = kzalloc(size: (sizeof(*desc)), GFP_NOWAIT); |
1509 | if (!desc) |
1510 | goto err_out; |
1511 | |
1512 | sdmac->status = DMA_IN_PROGRESS; |
1513 | sdmac->direction = direction; |
1514 | sdmac->flags = 0; |
1515 | |
1516 | desc->chn_count = 0; |
1517 | desc->chn_real_count = 0; |
1518 | desc->buf_tail = 0; |
1519 | desc->buf_ptail = 0; |
1520 | desc->sdmac = sdmac; |
1521 | desc->num_bd = bds; |
1522 | |
1523 | if (bds && sdma_alloc_bd(desc)) |
1524 | goto err_desc_out; |
1525 | |
1526 | /* No slave_config called in MEMCPY case, so do here */ |
1527 | if (direction == DMA_MEM_TO_MEM) |
1528 | sdma_config_ownership(sdmac, event_override: false, mcu_override: true, dsp_override: false); |
1529 | |
1530 | if (sdma_load_context(sdmac)) |
1531 | goto err_bd_out; |
1532 | |
1533 | return desc; |
1534 | |
1535 | err_bd_out: |
1536 | sdma_free_bd(desc); |
1537 | err_desc_out: |
1538 | kfree(objp: desc); |
1539 | err_out: |
1540 | return NULL; |
1541 | } |
1542 | |
1543 | static struct dma_async_tx_descriptor *sdma_prep_memcpy( |
1544 | struct dma_chan *chan, dma_addr_t dma_dst, |
1545 | dma_addr_t dma_src, size_t len, unsigned long flags) |
1546 | { |
1547 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1548 | struct sdma_engine *sdma = sdmac->sdma; |
1549 | int channel = sdmac->channel; |
1550 | size_t count; |
1551 | int i = 0, param; |
1552 | struct sdma_buffer_descriptor *bd; |
1553 | struct sdma_desc *desc; |
1554 | |
1555 | if (!chan || !len) |
1556 | return NULL; |
1557 | |
1558 | dev_dbg(sdma->dev, "memcpy: %pad->%pad, len=%zu, channel=%d.\n" , |
1559 | &dma_src, &dma_dst, len, channel); |
1560 | |
1561 | desc = sdma_transfer_init(sdmac, direction: DMA_MEM_TO_MEM, |
1562 | bds: len / SDMA_BD_MAX_CNT + 1); |
1563 | if (!desc) |
1564 | return NULL; |
1565 | |
1566 | do { |
1567 | count = min_t(size_t, len, SDMA_BD_MAX_CNT); |
1568 | bd = &desc->bd[i]; |
1569 | bd->buffer_addr = dma_src; |
1570 | bd->ext_buffer_addr = dma_dst; |
1571 | bd->mode.count = count; |
1572 | desc->chn_count += count; |
1573 | bd->mode.command = 0; |
1574 | |
1575 | dma_src += count; |
1576 | dma_dst += count; |
1577 | len -= count; |
1578 | i++; |
1579 | |
1580 | param = BD_DONE | BD_EXTD | BD_CONT; |
1581 | /* last bd */ |
1582 | if (!len) { |
1583 | param |= BD_INTR; |
1584 | param |= BD_LAST; |
1585 | param &= ~BD_CONT; |
1586 | } |
1587 | |
1588 | dev_dbg(sdma->dev, "entry %d: count: %zd dma: 0x%x %s%s\n" , |
1589 | i, count, bd->buffer_addr, |
1590 | param & BD_WRAP ? "wrap" : "" , |
1591 | param & BD_INTR ? " intr" : "" ); |
1592 | |
1593 | bd->mode.status = param; |
1594 | } while (len); |
1595 | |
1596 | return vchan_tx_prep(vc: &sdmac->vc, vd: &desc->vd, tx_flags: flags); |
1597 | } |
1598 | |
1599 | static struct dma_async_tx_descriptor *sdma_prep_slave_sg( |
1600 | struct dma_chan *chan, struct scatterlist *sgl, |
1601 | unsigned int sg_len, enum dma_transfer_direction direction, |
1602 | unsigned long flags, void *context) |
1603 | { |
1604 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1605 | struct sdma_engine *sdma = sdmac->sdma; |
1606 | int i, count; |
1607 | int channel = sdmac->channel; |
1608 | struct scatterlist *sg; |
1609 | struct sdma_desc *desc; |
1610 | |
1611 | sdma_config_write(chan, dmaengine_cfg: &sdmac->slave_config, direction); |
1612 | |
1613 | desc = sdma_transfer_init(sdmac, direction, bds: sg_len); |
1614 | if (!desc) |
1615 | goto err_out; |
1616 | |
1617 | dev_dbg(sdma->dev, "setting up %d entries for channel %d.\n" , |
1618 | sg_len, channel); |
1619 | |
1620 | for_each_sg(sgl, sg, sg_len, i) { |
1621 | struct sdma_buffer_descriptor *bd = &desc->bd[i]; |
1622 | int param; |
1623 | |
1624 | bd->buffer_addr = sg->dma_address; |
1625 | |
1626 | count = sg_dma_len(sg); |
1627 | |
1628 | if (count > SDMA_BD_MAX_CNT) { |
1629 | dev_err(sdma->dev, "SDMA channel %d: maximum bytes for sg entry exceeded: %d > %d\n" , |
1630 | channel, count, SDMA_BD_MAX_CNT); |
1631 | goto err_bd_out; |
1632 | } |
1633 | |
1634 | bd->mode.count = count; |
1635 | desc->chn_count += count; |
1636 | |
1637 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) |
1638 | goto err_bd_out; |
1639 | |
1640 | switch (sdmac->word_size) { |
1641 | case DMA_SLAVE_BUSWIDTH_4_BYTES: |
1642 | bd->mode.command = 0; |
1643 | if (count & 3 || sg->dma_address & 3) |
1644 | goto err_bd_out; |
1645 | break; |
1646 | case DMA_SLAVE_BUSWIDTH_2_BYTES: |
1647 | bd->mode.command = 2; |
1648 | if (count & 1 || sg->dma_address & 1) |
1649 | goto err_bd_out; |
1650 | break; |
1651 | case DMA_SLAVE_BUSWIDTH_1_BYTE: |
1652 | bd->mode.command = 1; |
1653 | break; |
1654 | default: |
1655 | goto err_bd_out; |
1656 | } |
1657 | |
1658 | param = BD_DONE | BD_EXTD | BD_CONT; |
1659 | |
1660 | if (i + 1 == sg_len) { |
1661 | param |= BD_INTR; |
1662 | param |= BD_LAST; |
1663 | param &= ~BD_CONT; |
1664 | } |
1665 | |
1666 | dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n" , |
1667 | i, count, (u64)sg->dma_address, |
1668 | param & BD_WRAP ? "wrap" : "" , |
1669 | param & BD_INTR ? " intr" : "" ); |
1670 | |
1671 | bd->mode.status = param; |
1672 | } |
1673 | |
1674 | return vchan_tx_prep(vc: &sdmac->vc, vd: &desc->vd, tx_flags: flags); |
1675 | err_bd_out: |
1676 | sdma_free_bd(desc); |
1677 | kfree(objp: desc); |
1678 | err_out: |
1679 | sdmac->status = DMA_ERROR; |
1680 | return NULL; |
1681 | } |
1682 | |
1683 | static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic( |
1684 | struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, |
1685 | size_t period_len, enum dma_transfer_direction direction, |
1686 | unsigned long flags) |
1687 | { |
1688 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1689 | struct sdma_engine *sdma = sdmac->sdma; |
1690 | int num_periods = 0; |
1691 | int channel = sdmac->channel; |
1692 | int i = 0, buf = 0; |
1693 | struct sdma_desc *desc; |
1694 | |
1695 | dev_dbg(sdma->dev, "%s channel: %d\n" , __func__, channel); |
1696 | |
1697 | if (sdmac->peripheral_type != IMX_DMATYPE_HDMI) |
1698 | num_periods = buf_len / period_len; |
1699 | |
1700 | sdma_config_write(chan, dmaengine_cfg: &sdmac->slave_config, direction); |
1701 | |
1702 | desc = sdma_transfer_init(sdmac, direction, bds: num_periods); |
1703 | if (!desc) |
1704 | goto err_out; |
1705 | |
1706 | desc->period_len = period_len; |
1707 | |
1708 | sdmac->flags |= IMX_DMA_SG_LOOP; |
1709 | |
1710 | if (period_len > SDMA_BD_MAX_CNT) { |
1711 | dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %zu > %d\n" , |
1712 | channel, period_len, SDMA_BD_MAX_CNT); |
1713 | goto err_bd_out; |
1714 | } |
1715 | |
1716 | if (sdmac->peripheral_type == IMX_DMATYPE_HDMI) |
1717 | return vchan_tx_prep(vc: &sdmac->vc, vd: &desc->vd, tx_flags: flags); |
1718 | |
1719 | while (buf < buf_len) { |
1720 | struct sdma_buffer_descriptor *bd = &desc->bd[i]; |
1721 | int param; |
1722 | |
1723 | bd->buffer_addr = dma_addr; |
1724 | |
1725 | bd->mode.count = period_len; |
1726 | |
1727 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) |
1728 | goto err_bd_out; |
1729 | if (sdmac->word_size == DMA_SLAVE_BUSWIDTH_4_BYTES) |
1730 | bd->mode.command = 0; |
1731 | else |
1732 | bd->mode.command = sdmac->word_size; |
1733 | |
1734 | param = BD_DONE | BD_EXTD | BD_CONT | BD_INTR; |
1735 | if (i + 1 == num_periods) |
1736 | param |= BD_WRAP; |
1737 | |
1738 | dev_dbg(sdma->dev, "entry %d: count: %zu dma: %#llx %s%s\n" , |
1739 | i, period_len, (u64)dma_addr, |
1740 | param & BD_WRAP ? "wrap" : "" , |
1741 | param & BD_INTR ? " intr" : "" ); |
1742 | |
1743 | bd->mode.status = param; |
1744 | |
1745 | dma_addr += period_len; |
1746 | buf += period_len; |
1747 | |
1748 | i++; |
1749 | } |
1750 | |
1751 | return vchan_tx_prep(vc: &sdmac->vc, vd: &desc->vd, tx_flags: flags); |
1752 | err_bd_out: |
1753 | sdma_free_bd(desc); |
1754 | kfree(objp: desc); |
1755 | err_out: |
1756 | sdmac->status = DMA_ERROR; |
1757 | return NULL; |
1758 | } |
1759 | |
1760 | static int sdma_config_write(struct dma_chan *chan, |
1761 | struct dma_slave_config *dmaengine_cfg, |
1762 | enum dma_transfer_direction direction) |
1763 | { |
1764 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1765 | |
1766 | if (direction == DMA_DEV_TO_MEM) { |
1767 | sdmac->per_address = dmaengine_cfg->src_addr; |
1768 | sdmac->watermark_level = dmaengine_cfg->src_maxburst * |
1769 | dmaengine_cfg->src_addr_width; |
1770 | sdmac->word_size = dmaengine_cfg->src_addr_width; |
1771 | } else if (direction == DMA_DEV_TO_DEV) { |
1772 | sdmac->per_address2 = dmaengine_cfg->src_addr; |
1773 | sdmac->per_address = dmaengine_cfg->dst_addr; |
1774 | sdmac->watermark_level = dmaengine_cfg->src_maxburst & |
1775 | SDMA_WATERMARK_LEVEL_LWML; |
1776 | sdmac->watermark_level |= (dmaengine_cfg->dst_maxburst << 16) & |
1777 | SDMA_WATERMARK_LEVEL_HWML; |
1778 | sdmac->word_size = dmaengine_cfg->dst_addr_width; |
1779 | } else if (sdmac->peripheral_type == IMX_DMATYPE_HDMI) { |
1780 | sdmac->per_address = dmaengine_cfg->dst_addr; |
1781 | sdmac->per_address2 = dmaengine_cfg->src_addr; |
1782 | sdmac->watermark_level = 0; |
1783 | } else { |
1784 | sdmac->per_address = dmaengine_cfg->dst_addr; |
1785 | sdmac->watermark_level = dmaengine_cfg->dst_maxburst * |
1786 | dmaengine_cfg->dst_addr_width; |
1787 | sdmac->word_size = dmaengine_cfg->dst_addr_width; |
1788 | } |
1789 | sdmac->direction = direction; |
1790 | return sdma_config_channel(chan); |
1791 | } |
1792 | |
1793 | static int sdma_config(struct dma_chan *chan, |
1794 | struct dma_slave_config *dmaengine_cfg) |
1795 | { |
1796 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1797 | struct sdma_engine *sdma = sdmac->sdma; |
1798 | |
1799 | memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg)); |
1800 | |
1801 | if (dmaengine_cfg->peripheral_config) { |
1802 | struct sdma_peripheral_config *sdmacfg = dmaengine_cfg->peripheral_config; |
1803 | if (dmaengine_cfg->peripheral_size != sizeof(struct sdma_peripheral_config)) { |
1804 | dev_err(sdma->dev, "Invalid peripheral size %zu, expected %zu\n" , |
1805 | dmaengine_cfg->peripheral_size, |
1806 | sizeof(struct sdma_peripheral_config)); |
1807 | return -EINVAL; |
1808 | } |
1809 | sdmac->n_fifos_src = sdmacfg->n_fifos_src; |
1810 | sdmac->n_fifos_dst = sdmacfg->n_fifos_dst; |
1811 | sdmac->stride_fifos_src = sdmacfg->stride_fifos_src; |
1812 | sdmac->stride_fifos_dst = sdmacfg->stride_fifos_dst; |
1813 | sdmac->words_per_fifo = sdmacfg->words_per_fifo; |
1814 | sdmac->sw_done = sdmacfg->sw_done; |
1815 | } |
1816 | |
1817 | /* Set ENBLn earlier to make sure dma request triggered after that */ |
1818 | if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events) |
1819 | return -EINVAL; |
1820 | sdma_event_enable(sdmac, event: sdmac->event_id0); |
1821 | |
1822 | if (sdmac->event_id1) { |
1823 | if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events) |
1824 | return -EINVAL; |
1825 | sdma_event_enable(sdmac, event: sdmac->event_id1); |
1826 | } |
1827 | |
1828 | return 0; |
1829 | } |
1830 | |
1831 | static enum dma_status sdma_tx_status(struct dma_chan *chan, |
1832 | dma_cookie_t cookie, |
1833 | struct dma_tx_state *txstate) |
1834 | { |
1835 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1836 | struct sdma_desc *desc = NULL; |
1837 | u32 residue; |
1838 | struct virt_dma_desc *vd; |
1839 | enum dma_status ret; |
1840 | unsigned long flags; |
1841 | |
1842 | ret = dma_cookie_status(chan, cookie, state: txstate); |
1843 | if (ret == DMA_COMPLETE || !txstate) |
1844 | return ret; |
1845 | |
1846 | spin_lock_irqsave(&sdmac->vc.lock, flags); |
1847 | |
1848 | vd = vchan_find_desc(&sdmac->vc, cookie); |
1849 | if (vd) |
1850 | desc = to_sdma_desc(t: &vd->tx); |
1851 | else if (sdmac->desc && sdmac->desc->vd.tx.cookie == cookie) |
1852 | desc = sdmac->desc; |
1853 | |
1854 | if (desc) { |
1855 | if (sdmac->flags & IMX_DMA_SG_LOOP) |
1856 | residue = (desc->num_bd - desc->buf_ptail) * |
1857 | desc->period_len - desc->chn_real_count; |
1858 | else |
1859 | residue = desc->chn_count - desc->chn_real_count; |
1860 | } else { |
1861 | residue = 0; |
1862 | } |
1863 | |
1864 | spin_unlock_irqrestore(lock: &sdmac->vc.lock, flags); |
1865 | |
1866 | dma_set_tx_state(st: txstate, last: chan->completed_cookie, used: chan->cookie, |
1867 | residue); |
1868 | |
1869 | return sdmac->status; |
1870 | } |
1871 | |
1872 | static void sdma_issue_pending(struct dma_chan *chan) |
1873 | { |
1874 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1875 | unsigned long flags; |
1876 | |
1877 | spin_lock_irqsave(&sdmac->vc.lock, flags); |
1878 | if (vchan_issue_pending(vc: &sdmac->vc) && !sdmac->desc) |
1879 | sdma_start_desc(sdmac); |
1880 | spin_unlock_irqrestore(lock: &sdmac->vc.lock, flags); |
1881 | } |
1882 | |
1883 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34 |
1884 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2 38 |
1885 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 45 |
1886 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V4 46 |
1887 | |
1888 | static void sdma_add_scripts(struct sdma_engine *sdma, |
1889 | const struct sdma_script_start_addrs *addr) |
1890 | { |
1891 | s32 *addr_arr = (u32 *)addr; |
1892 | s32 *saddr_arr = (u32 *)sdma->script_addrs; |
1893 | int i; |
1894 | |
1895 | /* use the default firmware in ROM if missing external firmware */ |
1896 | if (!sdma->script_number) |
1897 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; |
1898 | |
1899 | if (sdma->script_number > sizeof(struct sdma_script_start_addrs) |
1900 | / sizeof(s32)) { |
1901 | dev_err(sdma->dev, |
1902 | "SDMA script number %d not match with firmware.\n" , |
1903 | sdma->script_number); |
1904 | return; |
1905 | } |
1906 | |
1907 | for (i = 0; i < sdma->script_number; i++) |
1908 | if (addr_arr[i] > 0) |
1909 | saddr_arr[i] = addr_arr[i]; |
1910 | |
1911 | /* |
1912 | * For compatibility with NXP internal legacy kernel before 4.19 which |
1913 | * is based on uart ram script and mainline kernel based on uart rom |
1914 | * script, both uart ram/rom scripts are present in newer sdma |
1915 | * firmware. Use the rom versions if they are present (V3 or newer). |
1916 | */ |
1917 | if (sdma->script_number >= SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3) { |
1918 | if (addr->uart_2_mcu_rom_addr) |
1919 | sdma->script_addrs->uart_2_mcu_addr = addr->uart_2_mcu_rom_addr; |
1920 | if (addr->uartsh_2_mcu_rom_addr) |
1921 | sdma->script_addrs->uartsh_2_mcu_addr = addr->uartsh_2_mcu_rom_addr; |
1922 | } |
1923 | } |
1924 | |
1925 | static void sdma_load_firmware(const struct firmware *fw, void *context) |
1926 | { |
1927 | struct sdma_engine *sdma = context; |
1928 | const struct sdma_firmware_header *; |
1929 | const struct sdma_script_start_addrs *addr; |
1930 | unsigned short *ram_code; |
1931 | |
1932 | if (!fw) { |
1933 | dev_info(sdma->dev, "external firmware not found, using ROM firmware\n" ); |
1934 | /* In this case we just use the ROM firmware. */ |
1935 | return; |
1936 | } |
1937 | |
1938 | if (fw->size < sizeof(*header)) |
1939 | goto err_firmware; |
1940 | |
1941 | header = (struct sdma_firmware_header *)fw->data; |
1942 | |
1943 | if (header->magic != SDMA_FIRMWARE_MAGIC) |
1944 | goto err_firmware; |
1945 | if (header->ram_code_start + header->ram_code_size > fw->size) |
1946 | goto err_firmware; |
1947 | switch (header->version_major) { |
1948 | case 1: |
1949 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; |
1950 | break; |
1951 | case 2: |
1952 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2; |
1953 | break; |
1954 | case 3: |
1955 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3; |
1956 | break; |
1957 | case 4: |
1958 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V4; |
1959 | break; |
1960 | default: |
1961 | dev_err(sdma->dev, "unknown firmware version\n" ); |
1962 | goto err_firmware; |
1963 | } |
1964 | |
1965 | addr = (void *)header + header->script_addrs_start; |
1966 | ram_code = (void *)header + header->ram_code_start; |
1967 | |
1968 | clk_enable(clk: sdma->clk_ipg); |
1969 | clk_enable(clk: sdma->clk_ahb); |
1970 | /* download the RAM image for SDMA */ |
1971 | sdma_load_script(sdma, buf: ram_code, |
1972 | size: header->ram_code_size, |
1973 | address: addr->ram_code_start_addr); |
1974 | clk_disable(clk: sdma->clk_ipg); |
1975 | clk_disable(clk: sdma->clk_ahb); |
1976 | |
1977 | sdma_add_scripts(sdma, addr); |
1978 | |
1979 | sdma->fw_loaded = true; |
1980 | |
1981 | dev_info(sdma->dev, "loaded firmware %d.%d\n" , |
1982 | header->version_major, |
1983 | header->version_minor); |
1984 | |
1985 | err_firmware: |
1986 | release_firmware(fw); |
1987 | } |
1988 | |
1989 | #define EVENT_REMAP_CELLS 3 |
1990 | |
1991 | static int sdma_event_remap(struct sdma_engine *sdma) |
1992 | { |
1993 | struct device_node *np = sdma->dev->of_node; |
1994 | struct device_node *gpr_np = of_parse_phandle(np, phandle_name: "gpr" , index: 0); |
1995 | struct property *event_remap; |
1996 | struct regmap *gpr; |
1997 | char propname[] = "fsl,sdma-event-remap" ; |
1998 | u32 reg, val, shift, num_map, i; |
1999 | int ret = 0; |
2000 | |
2001 | if (IS_ERR(ptr: np) || !gpr_np) |
2002 | goto out; |
2003 | |
2004 | event_remap = of_find_property(np, name: propname, NULL); |
2005 | num_map = event_remap ? (event_remap->length / sizeof(u32)) : 0; |
2006 | if (!num_map) { |
2007 | dev_dbg(sdma->dev, "no event needs to be remapped\n" ); |
2008 | goto out; |
2009 | } else if (num_map % EVENT_REMAP_CELLS) { |
2010 | dev_err(sdma->dev, "the property %s must modulo %d\n" , |
2011 | propname, EVENT_REMAP_CELLS); |
2012 | ret = -EINVAL; |
2013 | goto out; |
2014 | } |
2015 | |
2016 | gpr = syscon_node_to_regmap(np: gpr_np); |
2017 | if (IS_ERR(ptr: gpr)) { |
2018 | dev_err(sdma->dev, "failed to get gpr regmap\n" ); |
2019 | ret = PTR_ERR(ptr: gpr); |
2020 | goto out; |
2021 | } |
2022 | |
2023 | for (i = 0; i < num_map; i += EVENT_REMAP_CELLS) { |
2024 | ret = of_property_read_u32_index(np, propname, index: i, out_value: ®); |
2025 | if (ret) { |
2026 | dev_err(sdma->dev, "failed to read property %s index %d\n" , |
2027 | propname, i); |
2028 | goto out; |
2029 | } |
2030 | |
2031 | ret = of_property_read_u32_index(np, propname, index: i + 1, out_value: &shift); |
2032 | if (ret) { |
2033 | dev_err(sdma->dev, "failed to read property %s index %d\n" , |
2034 | propname, i + 1); |
2035 | goto out; |
2036 | } |
2037 | |
2038 | ret = of_property_read_u32_index(np, propname, index: i + 2, out_value: &val); |
2039 | if (ret) { |
2040 | dev_err(sdma->dev, "failed to read property %s index %d\n" , |
2041 | propname, i + 2); |
2042 | goto out; |
2043 | } |
2044 | |
2045 | regmap_update_bits(map: gpr, reg, BIT(shift), val: val << shift); |
2046 | } |
2047 | |
2048 | out: |
2049 | if (gpr_np) |
2050 | of_node_put(node: gpr_np); |
2051 | |
2052 | return ret; |
2053 | } |
2054 | |
2055 | static int sdma_get_firmware(struct sdma_engine *sdma, |
2056 | const char *fw_name) |
2057 | { |
2058 | int ret; |
2059 | |
2060 | ret = request_firmware_nowait(THIS_MODULE, |
2061 | FW_ACTION_UEVENT, name: fw_name, device: sdma->dev, |
2062 | GFP_KERNEL, context: sdma, cont: sdma_load_firmware); |
2063 | |
2064 | return ret; |
2065 | } |
2066 | |
2067 | static int sdma_init(struct sdma_engine *sdma) |
2068 | { |
2069 | int i, ret; |
2070 | dma_addr_t ccb_phys; |
2071 | |
2072 | ret = clk_enable(clk: sdma->clk_ipg); |
2073 | if (ret) |
2074 | return ret; |
2075 | ret = clk_enable(clk: sdma->clk_ahb); |
2076 | if (ret) |
2077 | goto disable_clk_ipg; |
2078 | |
2079 | if (sdma->drvdata->check_ratio && |
2080 | (clk_get_rate(clk: sdma->clk_ahb) == clk_get_rate(clk: sdma->clk_ipg))) |
2081 | sdma->clk_ratio = 1; |
2082 | |
2083 | /* Be sure SDMA has not started yet */ |
2084 | writel_relaxed(0, sdma->regs + SDMA_H_C0PTR); |
2085 | |
2086 | sdma->channel_control = dma_alloc_coherent(dev: sdma->dev, |
2087 | MAX_DMA_CHANNELS * sizeof(struct sdma_channel_control) + |
2088 | sizeof(struct sdma_context_data), |
2089 | dma_handle: &ccb_phys, GFP_KERNEL); |
2090 | |
2091 | if (!sdma->channel_control) { |
2092 | ret = -ENOMEM; |
2093 | goto err_dma_alloc; |
2094 | } |
2095 | |
2096 | sdma->context = (void *)sdma->channel_control + |
2097 | MAX_DMA_CHANNELS * sizeof(struct sdma_channel_control); |
2098 | sdma->context_phys = ccb_phys + |
2099 | MAX_DMA_CHANNELS * sizeof(struct sdma_channel_control); |
2100 | |
2101 | /* disable all channels */ |
2102 | for (i = 0; i < sdma->drvdata->num_events; i++) |
2103 | writel_relaxed(0, sdma->regs + chnenbl_ofs(sdma, i)); |
2104 | |
2105 | /* All channels have priority 0 */ |
2106 | for (i = 0; i < MAX_DMA_CHANNELS; i++) |
2107 | writel_relaxed(0, sdma->regs + SDMA_CHNPRI_0 + i * 4); |
2108 | |
2109 | ret = sdma_request_channel0(sdma); |
2110 | if (ret) |
2111 | goto err_dma_alloc; |
2112 | |
2113 | sdma_config_ownership(sdmac: &sdma->channel[0], event_override: false, mcu_override: true, dsp_override: false); |
2114 | |
2115 | /* Set Command Channel (Channel Zero) */ |
2116 | writel_relaxed(0x4050, sdma->regs + SDMA_CHN0ADDR); |
2117 | |
2118 | /* Set bits of CONFIG register but with static context switching */ |
2119 | if (sdma->clk_ratio) |
2120 | writel_relaxed(SDMA_H_CONFIG_ACR, sdma->regs + SDMA_H_CONFIG); |
2121 | else |
2122 | writel_relaxed(0, sdma->regs + SDMA_H_CONFIG); |
2123 | |
2124 | writel_relaxed(ccb_phys, sdma->regs + SDMA_H_C0PTR); |
2125 | |
2126 | /* Initializes channel's priorities */ |
2127 | sdma_set_channel_priority(sdmac: &sdma->channel[0], priority: 7); |
2128 | |
2129 | clk_disable(clk: sdma->clk_ipg); |
2130 | clk_disable(clk: sdma->clk_ahb); |
2131 | |
2132 | return 0; |
2133 | |
2134 | err_dma_alloc: |
2135 | clk_disable(clk: sdma->clk_ahb); |
2136 | disable_clk_ipg: |
2137 | clk_disable(clk: sdma->clk_ipg); |
2138 | dev_err(sdma->dev, "initialisation failed with %d\n" , ret); |
2139 | return ret; |
2140 | } |
2141 | |
2142 | static bool sdma_filter_fn(struct dma_chan *chan, void *fn_param) |
2143 | { |
2144 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
2145 | struct imx_dma_data *data = fn_param; |
2146 | |
2147 | if (!imx_dma_is_general_purpose(chan)) |
2148 | return false; |
2149 | |
2150 | sdmac->data = *data; |
2151 | chan->private = &sdmac->data; |
2152 | |
2153 | return true; |
2154 | } |
2155 | |
2156 | static struct dma_chan *sdma_xlate(struct of_phandle_args *dma_spec, |
2157 | struct of_dma *ofdma) |
2158 | { |
2159 | struct sdma_engine *sdma = ofdma->of_dma_data; |
2160 | dma_cap_mask_t mask = sdma->dma_device.cap_mask; |
2161 | struct imx_dma_data data; |
2162 | |
2163 | if (dma_spec->args_count != 3) |
2164 | return NULL; |
2165 | |
2166 | data.dma_request = dma_spec->args[0]; |
2167 | data.peripheral_type = dma_spec->args[1]; |
2168 | data.priority = dma_spec->args[2]; |
2169 | /* |
2170 | * init dma_request2 to zero, which is not used by the dts. |
2171 | * For P2P, dma_request2 is init from dma_request_channel(), |
2172 | * chan->private will point to the imx_dma_data, and in |
2173 | * device_alloc_chan_resources(), imx_dma_data.dma_request2 will |
2174 | * be set to sdmac->event_id1. |
2175 | */ |
2176 | data.dma_request2 = 0; |
2177 | |
2178 | return __dma_request_channel(mask: &mask, fn: sdma_filter_fn, fn_param: &data, |
2179 | np: ofdma->of_node); |
2180 | } |
2181 | |
2182 | static int sdma_probe(struct platform_device *pdev) |
2183 | { |
2184 | struct device_node *np = pdev->dev.of_node; |
2185 | struct device_node *spba_bus; |
2186 | const char *fw_name; |
2187 | int ret; |
2188 | int irq; |
2189 | struct resource spba_res; |
2190 | int i; |
2191 | struct sdma_engine *sdma; |
2192 | s32 *saddr_arr; |
2193 | |
2194 | ret = dma_coerce_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(32)); |
2195 | if (ret) |
2196 | return ret; |
2197 | |
2198 | sdma = devm_kzalloc(dev: &pdev->dev, size: sizeof(*sdma), GFP_KERNEL); |
2199 | if (!sdma) |
2200 | return -ENOMEM; |
2201 | |
2202 | spin_lock_init(&sdma->channel_0_lock); |
2203 | |
2204 | sdma->dev = &pdev->dev; |
2205 | sdma->drvdata = of_device_get_match_data(dev: sdma->dev); |
2206 | |
2207 | irq = platform_get_irq(pdev, 0); |
2208 | if (irq < 0) |
2209 | return irq; |
2210 | |
2211 | sdma->regs = devm_platform_ioremap_resource(pdev, index: 0); |
2212 | if (IS_ERR(ptr: sdma->regs)) |
2213 | return PTR_ERR(ptr: sdma->regs); |
2214 | |
2215 | sdma->clk_ipg = devm_clk_get(dev: &pdev->dev, id: "ipg" ); |
2216 | if (IS_ERR(ptr: sdma->clk_ipg)) |
2217 | return PTR_ERR(ptr: sdma->clk_ipg); |
2218 | |
2219 | sdma->clk_ahb = devm_clk_get(dev: &pdev->dev, id: "ahb" ); |
2220 | if (IS_ERR(ptr: sdma->clk_ahb)) |
2221 | return PTR_ERR(ptr: sdma->clk_ahb); |
2222 | |
2223 | ret = clk_prepare(clk: sdma->clk_ipg); |
2224 | if (ret) |
2225 | return ret; |
2226 | |
2227 | ret = clk_prepare(clk: sdma->clk_ahb); |
2228 | if (ret) |
2229 | goto err_clk; |
2230 | |
2231 | ret = devm_request_irq(dev: &pdev->dev, irq, handler: sdma_int_handler, irqflags: 0, |
2232 | devname: dev_name(dev: &pdev->dev), dev_id: sdma); |
2233 | if (ret) |
2234 | goto err_irq; |
2235 | |
2236 | sdma->irq = irq; |
2237 | |
2238 | sdma->script_addrs = kzalloc(size: sizeof(*sdma->script_addrs), GFP_KERNEL); |
2239 | if (!sdma->script_addrs) { |
2240 | ret = -ENOMEM; |
2241 | goto err_irq; |
2242 | } |
2243 | |
2244 | /* initially no scripts available */ |
2245 | saddr_arr = (s32 *)sdma->script_addrs; |
2246 | for (i = 0; i < sizeof(*sdma->script_addrs) / sizeof(s32); i++) |
2247 | saddr_arr[i] = -EINVAL; |
2248 | |
2249 | dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask); |
2250 | dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask); |
2251 | dma_cap_set(DMA_MEMCPY, sdma->dma_device.cap_mask); |
2252 | dma_cap_set(DMA_PRIVATE, sdma->dma_device.cap_mask); |
2253 | |
2254 | INIT_LIST_HEAD(list: &sdma->dma_device.channels); |
2255 | /* Initialize channel parameters */ |
2256 | for (i = 0; i < MAX_DMA_CHANNELS; i++) { |
2257 | struct sdma_channel *sdmac = &sdma->channel[i]; |
2258 | |
2259 | sdmac->sdma = sdma; |
2260 | |
2261 | sdmac->channel = i; |
2262 | sdmac->vc.desc_free = sdma_desc_free; |
2263 | INIT_LIST_HEAD(list: &sdmac->terminated); |
2264 | INIT_WORK(&sdmac->terminate_worker, |
2265 | sdma_channel_terminate_work); |
2266 | /* |
2267 | * Add the channel to the DMAC list. Do not add channel 0 though |
2268 | * because we need it internally in the SDMA driver. This also means |
2269 | * that channel 0 in dmaengine counting matches sdma channel 1. |
2270 | */ |
2271 | if (i) |
2272 | vchan_init(vc: &sdmac->vc, dmadev: &sdma->dma_device); |
2273 | } |
2274 | |
2275 | ret = sdma_init(sdma); |
2276 | if (ret) |
2277 | goto err_init; |
2278 | |
2279 | ret = sdma_event_remap(sdma); |
2280 | if (ret) |
2281 | goto err_init; |
2282 | |
2283 | if (sdma->drvdata->script_addrs) |
2284 | sdma_add_scripts(sdma, addr: sdma->drvdata->script_addrs); |
2285 | |
2286 | sdma->dma_device.dev = &pdev->dev; |
2287 | |
2288 | sdma->dma_device.device_alloc_chan_resources = sdma_alloc_chan_resources; |
2289 | sdma->dma_device.device_free_chan_resources = sdma_free_chan_resources; |
2290 | sdma->dma_device.device_tx_status = sdma_tx_status; |
2291 | sdma->dma_device.device_prep_slave_sg = sdma_prep_slave_sg; |
2292 | sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic; |
2293 | sdma->dma_device.device_config = sdma_config; |
2294 | sdma->dma_device.device_terminate_all = sdma_terminate_all; |
2295 | sdma->dma_device.device_synchronize = sdma_channel_synchronize; |
2296 | sdma->dma_device.src_addr_widths = SDMA_DMA_BUSWIDTHS; |
2297 | sdma->dma_device.dst_addr_widths = SDMA_DMA_BUSWIDTHS; |
2298 | sdma->dma_device.directions = SDMA_DMA_DIRECTIONS; |
2299 | sdma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT; |
2300 | sdma->dma_device.device_prep_dma_memcpy = sdma_prep_memcpy; |
2301 | sdma->dma_device.device_issue_pending = sdma_issue_pending; |
2302 | sdma->dma_device.copy_align = 2; |
2303 | dma_set_max_seg_size(dev: sdma->dma_device.dev, SDMA_BD_MAX_CNT); |
2304 | |
2305 | platform_set_drvdata(pdev, data: sdma); |
2306 | |
2307 | ret = dma_async_device_register(device: &sdma->dma_device); |
2308 | if (ret) { |
2309 | dev_err(&pdev->dev, "unable to register\n" ); |
2310 | goto err_init; |
2311 | } |
2312 | |
2313 | if (np) { |
2314 | ret = of_dma_controller_register(np, of_dma_xlate: sdma_xlate, data: sdma); |
2315 | if (ret) { |
2316 | dev_err(&pdev->dev, "failed to register controller\n" ); |
2317 | goto err_register; |
2318 | } |
2319 | |
2320 | spba_bus = of_find_compatible_node(NULL, NULL, compat: "fsl,spba-bus" ); |
2321 | ret = of_address_to_resource(dev: spba_bus, index: 0, r: &spba_res); |
2322 | if (!ret) { |
2323 | sdma->spba_start_addr = spba_res.start; |
2324 | sdma->spba_end_addr = spba_res.end; |
2325 | } |
2326 | of_node_put(node: spba_bus); |
2327 | } |
2328 | |
2329 | /* |
2330 | * Because that device tree does not encode ROM script address, |
2331 | * the RAM script in firmware is mandatory for device tree |
2332 | * probe, otherwise it fails. |
2333 | */ |
2334 | ret = of_property_read_string(np, propname: "fsl,sdma-ram-script-name" , |
2335 | out_string: &fw_name); |
2336 | if (ret) { |
2337 | dev_warn(&pdev->dev, "failed to get firmware name\n" ); |
2338 | } else { |
2339 | ret = sdma_get_firmware(sdma, fw_name); |
2340 | if (ret) |
2341 | dev_warn(&pdev->dev, "failed to get firmware from device tree\n" ); |
2342 | } |
2343 | |
2344 | return 0; |
2345 | |
2346 | err_register: |
2347 | dma_async_device_unregister(device: &sdma->dma_device); |
2348 | err_init: |
2349 | kfree(objp: sdma->script_addrs); |
2350 | err_irq: |
2351 | clk_unprepare(clk: sdma->clk_ahb); |
2352 | err_clk: |
2353 | clk_unprepare(clk: sdma->clk_ipg); |
2354 | return ret; |
2355 | } |
2356 | |
2357 | static void sdma_remove(struct platform_device *pdev) |
2358 | { |
2359 | struct sdma_engine *sdma = platform_get_drvdata(pdev); |
2360 | int i; |
2361 | |
2362 | devm_free_irq(dev: &pdev->dev, irq: sdma->irq, dev_id: sdma); |
2363 | dma_async_device_unregister(device: &sdma->dma_device); |
2364 | kfree(objp: sdma->script_addrs); |
2365 | clk_unprepare(clk: sdma->clk_ahb); |
2366 | clk_unprepare(clk: sdma->clk_ipg); |
2367 | /* Kill the tasklet */ |
2368 | for (i = 0; i < MAX_DMA_CHANNELS; i++) { |
2369 | struct sdma_channel *sdmac = &sdma->channel[i]; |
2370 | |
2371 | tasklet_kill(t: &sdmac->vc.task); |
2372 | sdma_free_chan_resources(chan: &sdmac->vc.chan); |
2373 | } |
2374 | |
2375 | platform_set_drvdata(pdev, NULL); |
2376 | } |
2377 | |
2378 | static struct platform_driver sdma_driver = { |
2379 | .driver = { |
2380 | .name = "imx-sdma" , |
2381 | .of_match_table = sdma_dt_ids, |
2382 | }, |
2383 | .remove_new = sdma_remove, |
2384 | .probe = sdma_probe, |
2385 | }; |
2386 | |
2387 | module_platform_driver(sdma_driver); |
2388 | |
2389 | MODULE_AUTHOR("Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>" ); |
2390 | MODULE_DESCRIPTION("i.MX SDMA driver" ); |
2391 | #if IS_ENABLED(CONFIG_SOC_IMX6Q) |
2392 | MODULE_FIRMWARE("imx/sdma/sdma-imx6q.bin" ); |
2393 | #endif |
2394 | #if IS_ENABLED(CONFIG_SOC_IMX7D) || IS_ENABLED(CONFIG_SOC_IMX8M) |
2395 | MODULE_FIRMWARE("imx/sdma/sdma-imx7d.bin" ); |
2396 | #endif |
2397 | MODULE_LICENSE("GPL" ); |
2398 | |