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 SG |
37 | #include <linux/of.h> |
38 | #include <linux/of_device.h> | |
9479e17c | 39 | #include <linux/of_dma.h> |
1ec1e82f SH |
40 | |
41 | #include <asm/irq.h> | |
82906b13 AB |
42 | #include <linux/platform_data/dma-imx-sdma.h> |
43 | #include <linux/platform_data/dma-imx.h> | |
1ec1e82f | 44 | |
d2ebfb33 RKAL |
45 | #include "dmaengine.h" |
46 | ||
1ec1e82f SH |
47 | /* SDMA registers */ |
48 | #define SDMA_H_C0PTR 0x000 | |
49 | #define SDMA_H_INTR 0x004 | |
50 | #define SDMA_H_STATSTOP 0x008 | |
51 | #define SDMA_H_START 0x00c | |
52 | #define SDMA_H_EVTOVR 0x010 | |
53 | #define SDMA_H_DSPOVR 0x014 | |
54 | #define SDMA_H_HOSTOVR 0x018 | |
55 | #define SDMA_H_EVTPEND 0x01c | |
56 | #define SDMA_H_DSPENBL 0x020 | |
57 | #define SDMA_H_RESET 0x024 | |
58 | #define SDMA_H_EVTERR 0x028 | |
59 | #define SDMA_H_INTRMSK 0x02c | |
60 | #define SDMA_H_PSW 0x030 | |
61 | #define SDMA_H_EVTERRDBG 0x034 | |
62 | #define SDMA_H_CONFIG 0x038 | |
63 | #define SDMA_ONCE_ENB 0x040 | |
64 | #define SDMA_ONCE_DATA 0x044 | |
65 | #define SDMA_ONCE_INSTR 0x048 | |
66 | #define SDMA_ONCE_STAT 0x04c | |
67 | #define SDMA_ONCE_CMD 0x050 | |
68 | #define SDMA_EVT_MIRROR 0x054 | |
69 | #define SDMA_ILLINSTADDR 0x058 | |
70 | #define SDMA_CHN0ADDR 0x05c | |
71 | #define SDMA_ONCE_RTB 0x060 | |
72 | #define SDMA_XTRIG_CONF1 0x070 | |
73 | #define SDMA_XTRIG_CONF2 0x074 | |
62550cd7 SG |
74 | #define SDMA_CHNENBL0_IMX35 0x200 |
75 | #define SDMA_CHNENBL0_IMX31 0x080 | |
1ec1e82f SH |
76 | #define SDMA_CHNPRI_0 0x100 |
77 | ||
78 | /* | |
79 | * Buffer descriptor status values. | |
80 | */ | |
81 | #define BD_DONE 0x01 | |
82 | #define BD_WRAP 0x02 | |
83 | #define BD_CONT 0x04 | |
84 | #define BD_INTR 0x08 | |
85 | #define BD_RROR 0x10 | |
86 | #define BD_LAST 0x20 | |
87 | #define BD_EXTD 0x80 | |
88 | ||
89 | /* | |
90 | * Data Node descriptor status values. | |
91 | */ | |
92 | #define DND_END_OF_FRAME 0x80 | |
93 | #define DND_END_OF_XFER 0x40 | |
94 | #define DND_DONE 0x20 | |
95 | #define DND_UNUSED 0x01 | |
96 | ||
97 | /* | |
98 | * IPCV2 descriptor status values. | |
99 | */ | |
100 | #define BD_IPCV2_END_OF_FRAME 0x40 | |
101 | ||
102 | #define IPCV2_MAX_NODES 50 | |
103 | /* | |
104 | * Error bit set in the CCB status field by the SDMA, | |
105 | * in setbd routine, in case of a transfer error | |
106 | */ | |
107 | #define DATA_ERROR 0x10000000 | |
108 | ||
109 | /* | |
110 | * Buffer descriptor commands. | |
111 | */ | |
112 | #define C0_ADDR 0x01 | |
113 | #define C0_LOAD 0x02 | |
114 | #define C0_DUMP 0x03 | |
115 | #define C0_SETCTX 0x07 | |
116 | #define C0_GETCTX 0x03 | |
117 | #define C0_SETDM 0x01 | |
118 | #define C0_SETPM 0x04 | |
119 | #define C0_GETDM 0x02 | |
120 | #define C0_GETPM 0x08 | |
121 | /* | |
122 | * Change endianness indicator in the BD command field | |
123 | */ | |
124 | #define CHANGE_ENDIANNESS 0x80 | |
125 | ||
126 | /* | |
127 | * Mode/Count of data node descriptors - IPCv2 | |
128 | */ | |
129 | struct sdma_mode_count { | |
130 | u32 count : 16; /* size of the buffer pointed by this BD */ | |
131 | u32 status : 8; /* E,R,I,C,W,D status bits stored here */ | |
132 | u32 command : 8; /* command mostlky used for channel 0 */ | |
133 | }; | |
134 | ||
135 | /* | |
136 | * Buffer descriptor | |
137 | */ | |
138 | struct sdma_buffer_descriptor { | |
139 | struct sdma_mode_count mode; | |
140 | u32 buffer_addr; /* address of the buffer described */ | |
141 | u32 ext_buffer_addr; /* extended buffer address */ | |
142 | } __attribute__ ((packed)); | |
143 | ||
144 | /** | |
145 | * struct sdma_channel_control - Channel control Block | |
146 | * | |
147 | * @current_bd_ptr current buffer descriptor processed | |
148 | * @base_bd_ptr first element of buffer descriptor array | |
149 | * @unused padding. The SDMA engine expects an array of 128 byte | |
150 | * control blocks | |
151 | */ | |
152 | struct sdma_channel_control { | |
153 | u32 current_bd_ptr; | |
154 | u32 base_bd_ptr; | |
155 | u32 unused[2]; | |
156 | } __attribute__ ((packed)); | |
157 | ||
158 | /** | |
159 | * struct sdma_state_registers - SDMA context for a channel | |
160 | * | |
161 | * @pc: program counter | |
162 | * @t: test bit: status of arithmetic & test instruction | |
163 | * @rpc: return program counter | |
164 | * @sf: source fault while loading data | |
165 | * @spc: loop start program counter | |
166 | * @df: destination fault while storing data | |
167 | * @epc: loop end program counter | |
168 | * @lm: loop mode | |
169 | */ | |
170 | struct sdma_state_registers { | |
171 | u32 pc :14; | |
172 | u32 unused1: 1; | |
173 | u32 t : 1; | |
174 | u32 rpc :14; | |
175 | u32 unused0: 1; | |
176 | u32 sf : 1; | |
177 | u32 spc :14; | |
178 | u32 unused2: 1; | |
179 | u32 df : 1; | |
180 | u32 epc :14; | |
181 | u32 lm : 2; | |
182 | } __attribute__ ((packed)); | |
183 | ||
184 | /** | |
185 | * struct sdma_context_data - sdma context specific to a channel | |
186 | * | |
187 | * @channel_state: channel state bits | |
188 | * @gReg: general registers | |
189 | * @mda: burst dma destination address register | |
190 | * @msa: burst dma source address register | |
191 | * @ms: burst dma status register | |
192 | * @md: burst dma data register | |
193 | * @pda: peripheral dma destination address register | |
194 | * @psa: peripheral dma source address register | |
195 | * @ps: peripheral dma status register | |
196 | * @pd: peripheral dma data register | |
197 | * @ca: CRC polynomial register | |
198 | * @cs: CRC accumulator register | |
199 | * @dda: dedicated core destination address register | |
200 | * @dsa: dedicated core source address register | |
201 | * @ds: dedicated core status register | |
202 | * @dd: dedicated core data register | |
203 | */ | |
204 | struct sdma_context_data { | |
205 | struct sdma_state_registers channel_state; | |
206 | u32 gReg[8]; | |
207 | u32 mda; | |
208 | u32 msa; | |
209 | u32 ms; | |
210 | u32 md; | |
211 | u32 pda; | |
212 | u32 psa; | |
213 | u32 ps; | |
214 | u32 pd; | |
215 | u32 ca; | |
216 | u32 cs; | |
217 | u32 dda; | |
218 | u32 dsa; | |
219 | u32 ds; | |
220 | u32 dd; | |
221 | u32 scratch0; | |
222 | u32 scratch1; | |
223 | u32 scratch2; | |
224 | u32 scratch3; | |
225 | u32 scratch4; | |
226 | u32 scratch5; | |
227 | u32 scratch6; | |
228 | u32 scratch7; | |
229 | } __attribute__ ((packed)); | |
230 | ||
231 | #define NUM_BD (int)(PAGE_SIZE / sizeof(struct sdma_buffer_descriptor)) | |
232 | ||
233 | struct sdma_engine; | |
234 | ||
235 | /** | |
236 | * struct sdma_channel - housekeeping for a SDMA channel | |
237 | * | |
238 | * @sdma pointer to the SDMA engine for this channel | |
23889c63 | 239 | * @channel the channel number, matches dmaengine chan_id + 1 |
1ec1e82f SH |
240 | * @direction transfer type. Needed for setting SDMA script |
241 | * @peripheral_type Peripheral type. Needed for setting SDMA script | |
242 | * @event_id0 aka dma request line | |
243 | * @event_id1 for channels that use 2 events | |
244 | * @word_size peripheral access size | |
245 | * @buf_tail ID of the buffer that was processed | |
1ec1e82f SH |
246 | * @num_bd max NUM_BD. number of descriptors currently handling |
247 | */ | |
248 | struct sdma_channel { | |
249 | struct sdma_engine *sdma; | |
250 | unsigned int channel; | |
db8196df | 251 | enum dma_transfer_direction direction; |
1ec1e82f SH |
252 | enum sdma_peripheral_type peripheral_type; |
253 | unsigned int event_id0; | |
254 | unsigned int event_id1; | |
255 | enum dma_slave_buswidth word_size; | |
256 | unsigned int buf_tail; | |
1ec1e82f | 257 | unsigned int num_bd; |
d1a792f3 | 258 | unsigned int period_len; |
1ec1e82f SH |
259 | struct sdma_buffer_descriptor *bd; |
260 | dma_addr_t bd_phys; | |
261 | unsigned int pc_from_device, pc_to_device; | |
262 | unsigned long flags; | |
263 | dma_addr_t per_address; | |
0bbc1413 RZ |
264 | unsigned long event_mask[2]; |
265 | unsigned long watermark_level; | |
1ec1e82f SH |
266 | u32 shp_addr, per_addr; |
267 | struct dma_chan chan; | |
268 | spinlock_t lock; | |
269 | struct dma_async_tx_descriptor desc; | |
1ec1e82f | 270 | enum dma_status status; |
ab59a510 HS |
271 | unsigned int chn_count; |
272 | unsigned int chn_real_count; | |
abd9ccc8 | 273 | struct tasklet_struct tasklet; |
0b351865 | 274 | struct imx_dma_data data; |
1ec1e82f SH |
275 | }; |
276 | ||
0bbc1413 | 277 | #define IMX_DMA_SG_LOOP BIT(0) |
1ec1e82f SH |
278 | |
279 | #define MAX_DMA_CHANNELS 32 | |
280 | #define MXC_SDMA_DEFAULT_PRIORITY 1 | |
281 | #define MXC_SDMA_MIN_PRIORITY 1 | |
282 | #define MXC_SDMA_MAX_PRIORITY 7 | |
283 | ||
1ec1e82f SH |
284 | #define SDMA_FIRMWARE_MAGIC 0x414d4453 |
285 | ||
286 | /** | |
287 | * struct sdma_firmware_header - Layout of the firmware image | |
288 | * | |
289 | * @magic "SDMA" | |
290 | * @version_major increased whenever layout of struct sdma_script_start_addrs | |
291 | * changes. | |
292 | * @version_minor firmware minor version (for binary compatible changes) | |
293 | * @script_addrs_start offset of struct sdma_script_start_addrs in this image | |
294 | * @num_script_addrs Number of script addresses in this image | |
295 | * @ram_code_start offset of SDMA ram image in this firmware image | |
296 | * @ram_code_size size of SDMA ram image | |
297 | * @script_addrs Stores the start address of the SDMA scripts | |
298 | * (in SDMA memory space) | |
299 | */ | |
300 | struct sdma_firmware_header { | |
301 | u32 magic; | |
302 | u32 version_major; | |
303 | u32 version_minor; | |
304 | u32 script_addrs_start; | |
305 | u32 num_script_addrs; | |
306 | u32 ram_code_start; | |
307 | u32 ram_code_size; | |
308 | }; | |
309 | ||
17bba72f SH |
310 | struct sdma_driver_data { |
311 | int chnenbl0; | |
312 | int num_events; | |
dcfec3c0 | 313 | struct sdma_script_start_addrs *script_addrs; |
62550cd7 SG |
314 | }; |
315 | ||
1ec1e82f SH |
316 | struct sdma_engine { |
317 | struct device *dev; | |
b9b3f82f | 318 | struct device_dma_parameters dma_parms; |
1ec1e82f SH |
319 | struct sdma_channel channel[MAX_DMA_CHANNELS]; |
320 | struct sdma_channel_control *channel_control; | |
321 | void __iomem *regs; | |
1ec1e82f SH |
322 | struct sdma_context_data *context; |
323 | dma_addr_t context_phys; | |
324 | struct dma_device dma_device; | |
7560e3f3 SH |
325 | struct clk *clk_ipg; |
326 | struct clk *clk_ahb; | |
2ccaef05 | 327 | spinlock_t channel_0_lock; |
cd72b846 | 328 | u32 script_number; |
1ec1e82f | 329 | struct sdma_script_start_addrs *script_addrs; |
17bba72f SH |
330 | const struct sdma_driver_data *drvdata; |
331 | }; | |
332 | ||
e9fd58de | 333 | static struct sdma_driver_data sdma_imx31 = { |
17bba72f SH |
334 | .chnenbl0 = SDMA_CHNENBL0_IMX31, |
335 | .num_events = 32, | |
336 | }; | |
337 | ||
dcfec3c0 SH |
338 | static struct sdma_script_start_addrs sdma_script_imx25 = { |
339 | .ap_2_ap_addr = 729, | |
340 | .uart_2_mcu_addr = 904, | |
341 | .per_2_app_addr = 1255, | |
342 | .mcu_2_app_addr = 834, | |
343 | .uartsh_2_mcu_addr = 1120, | |
344 | .per_2_shp_addr = 1329, | |
345 | .mcu_2_shp_addr = 1048, | |
346 | .ata_2_mcu_addr = 1560, | |
347 | .mcu_2_ata_addr = 1479, | |
348 | .app_2_per_addr = 1189, | |
349 | .app_2_mcu_addr = 770, | |
350 | .shp_2_per_addr = 1407, | |
351 | .shp_2_mcu_addr = 979, | |
352 | }; | |
353 | ||
e9fd58de | 354 | static struct sdma_driver_data sdma_imx25 = { |
dcfec3c0 SH |
355 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
356 | .num_events = 48, | |
357 | .script_addrs = &sdma_script_imx25, | |
358 | }; | |
359 | ||
e9fd58de | 360 | static struct sdma_driver_data sdma_imx35 = { |
17bba72f SH |
361 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
362 | .num_events = 48, | |
1ec1e82f SH |
363 | }; |
364 | ||
dcfec3c0 SH |
365 | static struct sdma_script_start_addrs sdma_script_imx51 = { |
366 | .ap_2_ap_addr = 642, | |
367 | .uart_2_mcu_addr = 817, | |
368 | .mcu_2_app_addr = 747, | |
369 | .mcu_2_shp_addr = 961, | |
370 | .ata_2_mcu_addr = 1473, | |
371 | .mcu_2_ata_addr = 1392, | |
372 | .app_2_per_addr = 1033, | |
373 | .app_2_mcu_addr = 683, | |
374 | .shp_2_per_addr = 1251, | |
375 | .shp_2_mcu_addr = 892, | |
376 | }; | |
377 | ||
e9fd58de | 378 | static struct sdma_driver_data sdma_imx51 = { |
dcfec3c0 SH |
379 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
380 | .num_events = 48, | |
381 | .script_addrs = &sdma_script_imx51, | |
382 | }; | |
383 | ||
384 | static struct sdma_script_start_addrs sdma_script_imx53 = { | |
385 | .ap_2_ap_addr = 642, | |
386 | .app_2_mcu_addr = 683, | |
387 | .mcu_2_app_addr = 747, | |
388 | .uart_2_mcu_addr = 817, | |
389 | .shp_2_mcu_addr = 891, | |
390 | .mcu_2_shp_addr = 960, | |
391 | .uartsh_2_mcu_addr = 1032, | |
392 | .spdif_2_mcu_addr = 1100, | |
393 | .mcu_2_spdif_addr = 1134, | |
394 | .firi_2_mcu_addr = 1193, | |
395 | .mcu_2_firi_addr = 1290, | |
396 | }; | |
397 | ||
e9fd58de | 398 | static struct sdma_driver_data sdma_imx53 = { |
dcfec3c0 SH |
399 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
400 | .num_events = 48, | |
401 | .script_addrs = &sdma_script_imx53, | |
402 | }; | |
403 | ||
404 | static struct sdma_script_start_addrs sdma_script_imx6q = { | |
405 | .ap_2_ap_addr = 642, | |
406 | .uart_2_mcu_addr = 817, | |
407 | .mcu_2_app_addr = 747, | |
408 | .per_2_per_addr = 6331, | |
409 | .uartsh_2_mcu_addr = 1032, | |
410 | .mcu_2_shp_addr = 960, | |
411 | .app_2_mcu_addr = 683, | |
412 | .shp_2_mcu_addr = 891, | |
413 | .spdif_2_mcu_addr = 1100, | |
414 | .mcu_2_spdif_addr = 1134, | |
415 | }; | |
416 | ||
e9fd58de | 417 | static struct sdma_driver_data sdma_imx6q = { |
dcfec3c0 SH |
418 | .chnenbl0 = SDMA_CHNENBL0_IMX35, |
419 | .num_events = 48, | |
420 | .script_addrs = &sdma_script_imx6q, | |
421 | }; | |
422 | ||
62550cd7 SG |
423 | static struct platform_device_id sdma_devtypes[] = { |
424 | { | |
dcfec3c0 SH |
425 | .name = "imx25-sdma", |
426 | .driver_data = (unsigned long)&sdma_imx25, | |
427 | }, { | |
62550cd7 | 428 | .name = "imx31-sdma", |
17bba72f | 429 | .driver_data = (unsigned long)&sdma_imx31, |
62550cd7 SG |
430 | }, { |
431 | .name = "imx35-sdma", | |
17bba72f | 432 | .driver_data = (unsigned long)&sdma_imx35, |
dcfec3c0 SH |
433 | }, { |
434 | .name = "imx51-sdma", | |
435 | .driver_data = (unsigned long)&sdma_imx51, | |
436 | }, { | |
437 | .name = "imx53-sdma", | |
438 | .driver_data = (unsigned long)&sdma_imx53, | |
439 | }, { | |
440 | .name = "imx6q-sdma", | |
441 | .driver_data = (unsigned long)&sdma_imx6q, | |
62550cd7 SG |
442 | }, { |
443 | /* sentinel */ | |
444 | } | |
445 | }; | |
446 | MODULE_DEVICE_TABLE(platform, sdma_devtypes); | |
447 | ||
580975d7 | 448 | static const struct of_device_id sdma_dt_ids[] = { |
dcfec3c0 SH |
449 | { .compatible = "fsl,imx6q-sdma", .data = &sdma_imx6q, }, |
450 | { .compatible = "fsl,imx53-sdma", .data = &sdma_imx53, }, | |
451 | { .compatible = "fsl,imx51-sdma", .data = &sdma_imx51, }, | |
17bba72f | 452 | { .compatible = "fsl,imx35-sdma", .data = &sdma_imx35, }, |
dcfec3c0 | 453 | { .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, }, |
63edea16 | 454 | { .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, }, |
580975d7 SG |
455 | { /* sentinel */ } |
456 | }; | |
457 | MODULE_DEVICE_TABLE(of, sdma_dt_ids); | |
458 | ||
0bbc1413 RZ |
459 | #define SDMA_H_CONFIG_DSPDMA BIT(12) /* indicates if the DSPDMA is used */ |
460 | #define SDMA_H_CONFIG_RTD_PINS BIT(11) /* indicates if Real-Time Debug pins are enabled */ | |
461 | #define SDMA_H_CONFIG_ACR BIT(4) /* indicates if AHB freq /core freq = 2 or 1 */ | |
1ec1e82f SH |
462 | #define SDMA_H_CONFIG_CSM (3) /* indicates which context switch mode is selected*/ |
463 | ||
464 | static inline u32 chnenbl_ofs(struct sdma_engine *sdma, unsigned int event) | |
465 | { | |
17bba72f | 466 | u32 chnenbl0 = sdma->drvdata->chnenbl0; |
1ec1e82f SH |
467 | return chnenbl0 + event * 4; |
468 | } | |
469 | ||
470 | static int sdma_config_ownership(struct sdma_channel *sdmac, | |
471 | bool event_override, bool mcu_override, bool dsp_override) | |
472 | { | |
473 | struct sdma_engine *sdma = sdmac->sdma; | |
474 | int channel = sdmac->channel; | |
0bbc1413 | 475 | unsigned long evt, mcu, dsp; |
1ec1e82f SH |
476 | |
477 | if (event_override && mcu_override && dsp_override) | |
478 | return -EINVAL; | |
479 | ||
c4b56857 RZ |
480 | evt = readl_relaxed(sdma->regs + SDMA_H_EVTOVR); |
481 | mcu = readl_relaxed(sdma->regs + SDMA_H_HOSTOVR); | |
482 | dsp = readl_relaxed(sdma->regs + SDMA_H_DSPOVR); | |
1ec1e82f SH |
483 | |
484 | if (dsp_override) | |
0bbc1413 | 485 | __clear_bit(channel, &dsp); |
1ec1e82f | 486 | else |
0bbc1413 | 487 | __set_bit(channel, &dsp); |
1ec1e82f SH |
488 | |
489 | if (event_override) | |
0bbc1413 | 490 | __clear_bit(channel, &evt); |
1ec1e82f | 491 | else |
0bbc1413 | 492 | __set_bit(channel, &evt); |
1ec1e82f SH |
493 | |
494 | if (mcu_override) | |
0bbc1413 | 495 | __clear_bit(channel, &mcu); |
1ec1e82f | 496 | else |
0bbc1413 | 497 | __set_bit(channel, &mcu); |
1ec1e82f | 498 | |
c4b56857 RZ |
499 | writel_relaxed(evt, sdma->regs + SDMA_H_EVTOVR); |
500 | writel_relaxed(mcu, sdma->regs + SDMA_H_HOSTOVR); | |
501 | writel_relaxed(dsp, sdma->regs + SDMA_H_DSPOVR); | |
1ec1e82f SH |
502 | |
503 | return 0; | |
504 | } | |
505 | ||
b9a59166 RZ |
506 | static void sdma_enable_channel(struct sdma_engine *sdma, int channel) |
507 | { | |
0bbc1413 | 508 | writel(BIT(channel), sdma->regs + SDMA_H_START); |
b9a59166 RZ |
509 | } |
510 | ||
1ec1e82f | 511 | /* |
2ccaef05 | 512 | * sdma_run_channel0 - run a channel and wait till it's done |
1ec1e82f | 513 | */ |
2ccaef05 | 514 | static int sdma_run_channel0(struct sdma_engine *sdma) |
1ec1e82f | 515 | { |
1ec1e82f | 516 | int ret; |
2ccaef05 | 517 | unsigned long timeout = 500; |
1ec1e82f | 518 | |
2ccaef05 | 519 | sdma_enable_channel(sdma, 0); |
1ec1e82f | 520 | |
2ccaef05 RZ |
521 | while (!(ret = readl_relaxed(sdma->regs + SDMA_H_INTR) & 1)) { |
522 | if (timeout-- <= 0) | |
523 | break; | |
524 | udelay(1); | |
525 | } | |
1ec1e82f | 526 | |
2ccaef05 RZ |
527 | if (ret) { |
528 | /* Clear the interrupt status */ | |
529 | writel_relaxed(ret, sdma->regs + SDMA_H_INTR); | |
530 | } else { | |
531 | dev_err(sdma->dev, "Timeout waiting for CH0 ready\n"); | |
532 | } | |
1ec1e82f SH |
533 | |
534 | return ret ? 0 : -ETIMEDOUT; | |
535 | } | |
536 | ||
537 | static int sdma_load_script(struct sdma_engine *sdma, void *buf, int size, | |
538 | u32 address) | |
539 | { | |
540 | struct sdma_buffer_descriptor *bd0 = sdma->channel[0].bd; | |
541 | void *buf_virt; | |
542 | dma_addr_t buf_phys; | |
543 | int ret; | |
2ccaef05 | 544 | unsigned long flags; |
73eab978 | 545 | |
1ec1e82f SH |
546 | buf_virt = dma_alloc_coherent(NULL, |
547 | size, | |
548 | &buf_phys, GFP_KERNEL); | |
73eab978 | 549 | if (!buf_virt) { |
2ccaef05 | 550 | return -ENOMEM; |
73eab978 | 551 | } |
1ec1e82f | 552 | |
2ccaef05 RZ |
553 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
554 | ||
1ec1e82f SH |
555 | bd0->mode.command = C0_SETPM; |
556 | bd0->mode.status = BD_DONE | BD_INTR | BD_WRAP | BD_EXTD; | |
557 | bd0->mode.count = size / 2; | |
558 | bd0->buffer_addr = buf_phys; | |
559 | bd0->ext_buffer_addr = address; | |
560 | ||
561 | memcpy(buf_virt, buf, size); | |
562 | ||
2ccaef05 | 563 | ret = sdma_run_channel0(sdma); |
1ec1e82f | 564 | |
2ccaef05 | 565 | spin_unlock_irqrestore(&sdma->channel_0_lock, flags); |
1ec1e82f | 566 | |
2ccaef05 | 567 | dma_free_coherent(NULL, size, buf_virt, buf_phys); |
73eab978 | 568 | |
1ec1e82f SH |
569 | return ret; |
570 | } | |
571 | ||
572 | static void sdma_event_enable(struct sdma_channel *sdmac, unsigned int event) | |
573 | { | |
574 | struct sdma_engine *sdma = sdmac->sdma; | |
575 | int channel = sdmac->channel; | |
0bbc1413 | 576 | unsigned long val; |
1ec1e82f SH |
577 | u32 chnenbl = chnenbl_ofs(sdma, event); |
578 | ||
c4b56857 | 579 | val = readl_relaxed(sdma->regs + chnenbl); |
0bbc1413 | 580 | __set_bit(channel, &val); |
c4b56857 | 581 | writel_relaxed(val, sdma->regs + chnenbl); |
1ec1e82f SH |
582 | } |
583 | ||
584 | static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event) | |
585 | { | |
586 | struct sdma_engine *sdma = sdmac->sdma; | |
587 | int channel = sdmac->channel; | |
588 | u32 chnenbl = chnenbl_ofs(sdma, event); | |
0bbc1413 | 589 | unsigned long val; |
1ec1e82f | 590 | |
c4b56857 | 591 | val = readl_relaxed(sdma->regs + chnenbl); |
0bbc1413 | 592 | __clear_bit(channel, &val); |
c4b56857 | 593 | writel_relaxed(val, sdma->regs + chnenbl); |
1ec1e82f SH |
594 | } |
595 | ||
596 | static void sdma_handle_channel_loop(struct sdma_channel *sdmac) | |
d1a792f3 RKAL |
597 | { |
598 | if (sdmac->desc.callback) | |
599 | sdmac->desc.callback(sdmac->desc.callback_param); | |
600 | } | |
601 | ||
602 | static void sdma_update_channel_loop(struct sdma_channel *sdmac) | |
1ec1e82f SH |
603 | { |
604 | struct sdma_buffer_descriptor *bd; | |
605 | ||
606 | /* | |
607 | * loop mode. Iterate over descriptors, re-setup them and | |
608 | * call callback function. | |
609 | */ | |
610 | while (1) { | |
611 | bd = &sdmac->bd[sdmac->buf_tail]; | |
612 | ||
613 | if (bd->mode.status & BD_DONE) | |
614 | break; | |
615 | ||
616 | if (bd->mode.status & BD_RROR) | |
617 | sdmac->status = DMA_ERROR; | |
1ec1e82f SH |
618 | |
619 | bd->mode.status |= BD_DONE; | |
620 | sdmac->buf_tail++; | |
621 | sdmac->buf_tail %= sdmac->num_bd; | |
1ec1e82f SH |
622 | } |
623 | } | |
624 | ||
625 | static void mxc_sdma_handle_channel_normal(struct sdma_channel *sdmac) | |
626 | { | |
627 | struct sdma_buffer_descriptor *bd; | |
628 | int i, error = 0; | |
629 | ||
ab59a510 | 630 | sdmac->chn_real_count = 0; |
1ec1e82f SH |
631 | /* |
632 | * non loop mode. Iterate over all descriptors, collect | |
633 | * errors and call callback function | |
634 | */ | |
635 | for (i = 0; i < sdmac->num_bd; i++) { | |
636 | bd = &sdmac->bd[i]; | |
637 | ||
638 | if (bd->mode.status & (BD_DONE | BD_RROR)) | |
639 | error = -EIO; | |
ab59a510 | 640 | sdmac->chn_real_count += bd->mode.count; |
1ec1e82f SH |
641 | } |
642 | ||
643 | if (error) | |
644 | sdmac->status = DMA_ERROR; | |
645 | else | |
409bff6a | 646 | sdmac->status = DMA_COMPLETE; |
1ec1e82f | 647 | |
f7fbce07 | 648 | dma_cookie_complete(&sdmac->desc); |
1ec1e82f SH |
649 | if (sdmac->desc.callback) |
650 | sdmac->desc.callback(sdmac->desc.callback_param); | |
1ec1e82f SH |
651 | } |
652 | ||
abd9ccc8 | 653 | static void sdma_tasklet(unsigned long data) |
1ec1e82f | 654 | { |
abd9ccc8 HS |
655 | struct sdma_channel *sdmac = (struct sdma_channel *) data; |
656 | ||
1ec1e82f SH |
657 | if (sdmac->flags & IMX_DMA_SG_LOOP) |
658 | sdma_handle_channel_loop(sdmac); | |
659 | else | |
660 | mxc_sdma_handle_channel_normal(sdmac); | |
661 | } | |
662 | ||
663 | static irqreturn_t sdma_int_handler(int irq, void *dev_id) | |
664 | { | |
665 | struct sdma_engine *sdma = dev_id; | |
0bbc1413 | 666 | unsigned long stat; |
1ec1e82f | 667 | |
c4b56857 | 668 | stat = readl_relaxed(sdma->regs + SDMA_H_INTR); |
2ccaef05 RZ |
669 | /* not interested in channel 0 interrupts */ |
670 | stat &= ~1; | |
c4b56857 | 671 | writel_relaxed(stat, sdma->regs + SDMA_H_INTR); |
1ec1e82f SH |
672 | |
673 | while (stat) { | |
674 | int channel = fls(stat) - 1; | |
675 | struct sdma_channel *sdmac = &sdma->channel[channel]; | |
676 | ||
d1a792f3 RKAL |
677 | if (sdmac->flags & IMX_DMA_SG_LOOP) |
678 | sdma_update_channel_loop(sdmac); | |
679 | ||
abd9ccc8 | 680 | tasklet_schedule(&sdmac->tasklet); |
1ec1e82f | 681 | |
0bbc1413 | 682 | __clear_bit(channel, &stat); |
1ec1e82f SH |
683 | } |
684 | ||
685 | return IRQ_HANDLED; | |
686 | } | |
687 | ||
688 | /* | |
689 | * sets the pc of SDMA script according to the peripheral type | |
690 | */ | |
691 | static void sdma_get_pc(struct sdma_channel *sdmac, | |
692 | enum sdma_peripheral_type peripheral_type) | |
693 | { | |
694 | struct sdma_engine *sdma = sdmac->sdma; | |
695 | int per_2_emi = 0, emi_2_per = 0; | |
696 | /* | |
697 | * These are needed once we start to support transfers between | |
698 | * two peripherals or memory-to-memory transfers | |
699 | */ | |
700 | int per_2_per = 0, emi_2_emi = 0; | |
701 | ||
702 | sdmac->pc_from_device = 0; | |
703 | sdmac->pc_to_device = 0; | |
704 | ||
705 | switch (peripheral_type) { | |
706 | case IMX_DMATYPE_MEMORY: | |
707 | emi_2_emi = sdma->script_addrs->ap_2_ap_addr; | |
708 | break; | |
709 | case IMX_DMATYPE_DSP: | |
710 | emi_2_per = sdma->script_addrs->bp_2_ap_addr; | |
711 | per_2_emi = sdma->script_addrs->ap_2_bp_addr; | |
712 | break; | |
713 | case IMX_DMATYPE_FIRI: | |
714 | per_2_emi = sdma->script_addrs->firi_2_mcu_addr; | |
715 | emi_2_per = sdma->script_addrs->mcu_2_firi_addr; | |
716 | break; | |
717 | case IMX_DMATYPE_UART: | |
718 | per_2_emi = sdma->script_addrs->uart_2_mcu_addr; | |
719 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; | |
720 | break; | |
721 | case IMX_DMATYPE_UART_SP: | |
722 | per_2_emi = sdma->script_addrs->uartsh_2_mcu_addr; | |
723 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
724 | break; | |
725 | case IMX_DMATYPE_ATA: | |
726 | per_2_emi = sdma->script_addrs->ata_2_mcu_addr; | |
727 | emi_2_per = sdma->script_addrs->mcu_2_ata_addr; | |
728 | break; | |
729 | case IMX_DMATYPE_CSPI: | |
730 | case IMX_DMATYPE_EXT: | |
731 | case IMX_DMATYPE_SSI: | |
29aebfde | 732 | case IMX_DMATYPE_SAI: |
1ec1e82f SH |
733 | per_2_emi = sdma->script_addrs->app_2_mcu_addr; |
734 | emi_2_per = sdma->script_addrs->mcu_2_app_addr; | |
735 | break; | |
1a895578 NC |
736 | case IMX_DMATYPE_SSI_DUAL: |
737 | per_2_emi = sdma->script_addrs->ssish_2_mcu_addr; | |
738 | emi_2_per = sdma->script_addrs->mcu_2_ssish_addr; | |
739 | break; | |
1ec1e82f SH |
740 | case IMX_DMATYPE_SSI_SP: |
741 | case IMX_DMATYPE_MMC: | |
742 | case IMX_DMATYPE_SDHC: | |
743 | case IMX_DMATYPE_CSPI_SP: | |
744 | case IMX_DMATYPE_ESAI: | |
745 | case IMX_DMATYPE_MSHC_SP: | |
746 | per_2_emi = sdma->script_addrs->shp_2_mcu_addr; | |
747 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
748 | break; | |
749 | case IMX_DMATYPE_ASRC: | |
750 | per_2_emi = sdma->script_addrs->asrc_2_mcu_addr; | |
751 | emi_2_per = sdma->script_addrs->asrc_2_mcu_addr; | |
752 | per_2_per = sdma->script_addrs->per_2_per_addr; | |
753 | break; | |
f892afb0 NC |
754 | case IMX_DMATYPE_ASRC_SP: |
755 | per_2_emi = sdma->script_addrs->shp_2_mcu_addr; | |
756 | emi_2_per = sdma->script_addrs->mcu_2_shp_addr; | |
757 | per_2_per = sdma->script_addrs->per_2_per_addr; | |
758 | break; | |
1ec1e82f SH |
759 | case IMX_DMATYPE_MSHC: |
760 | per_2_emi = sdma->script_addrs->mshc_2_mcu_addr; | |
761 | emi_2_per = sdma->script_addrs->mcu_2_mshc_addr; | |
762 | break; | |
763 | case IMX_DMATYPE_CCM: | |
764 | per_2_emi = sdma->script_addrs->dptc_dvfs_addr; | |
765 | break; | |
766 | case IMX_DMATYPE_SPDIF: | |
767 | per_2_emi = sdma->script_addrs->spdif_2_mcu_addr; | |
768 | emi_2_per = sdma->script_addrs->mcu_2_spdif_addr; | |
769 | break; | |
770 | case IMX_DMATYPE_IPU_MEMORY: | |
771 | emi_2_per = sdma->script_addrs->ext_mem_2_ipu_addr; | |
772 | break; | |
773 | default: | |
774 | break; | |
775 | } | |
776 | ||
777 | sdmac->pc_from_device = per_2_emi; | |
778 | sdmac->pc_to_device = emi_2_per; | |
779 | } | |
780 | ||
781 | static int sdma_load_context(struct sdma_channel *sdmac) | |
782 | { | |
783 | struct sdma_engine *sdma = sdmac->sdma; | |
784 | int channel = sdmac->channel; | |
785 | int load_address; | |
786 | struct sdma_context_data *context = sdma->context; | |
787 | struct sdma_buffer_descriptor *bd0 = sdma->channel[0].bd; | |
788 | int ret; | |
2ccaef05 | 789 | unsigned long flags; |
1ec1e82f | 790 | |
db8196df | 791 | if (sdmac->direction == DMA_DEV_TO_MEM) { |
1ec1e82f SH |
792 | load_address = sdmac->pc_from_device; |
793 | } else { | |
794 | load_address = sdmac->pc_to_device; | |
795 | } | |
796 | ||
797 | if (load_address < 0) | |
798 | return load_address; | |
799 | ||
800 | dev_dbg(sdma->dev, "load_address = %d\n", load_address); | |
0bbc1413 | 801 | dev_dbg(sdma->dev, "wml = 0x%08x\n", (u32)sdmac->watermark_level); |
1ec1e82f SH |
802 | dev_dbg(sdma->dev, "shp_addr = 0x%08x\n", sdmac->shp_addr); |
803 | dev_dbg(sdma->dev, "per_addr = 0x%08x\n", sdmac->per_addr); | |
0bbc1413 RZ |
804 | dev_dbg(sdma->dev, "event_mask0 = 0x%08x\n", (u32)sdmac->event_mask[0]); |
805 | dev_dbg(sdma->dev, "event_mask1 = 0x%08x\n", (u32)sdmac->event_mask[1]); | |
1ec1e82f | 806 | |
2ccaef05 | 807 | spin_lock_irqsave(&sdma->channel_0_lock, flags); |
73eab978 | 808 | |
1ec1e82f SH |
809 | memset(context, 0, sizeof(*context)); |
810 | context->channel_state.pc = load_address; | |
811 | ||
812 | /* Send by context the event mask,base address for peripheral | |
813 | * and watermark level | |
814 | */ | |
0bbc1413 RZ |
815 | context->gReg[0] = sdmac->event_mask[1]; |
816 | context->gReg[1] = sdmac->event_mask[0]; | |
1ec1e82f SH |
817 | context->gReg[2] = sdmac->per_addr; |
818 | context->gReg[6] = sdmac->shp_addr; | |
819 | context->gReg[7] = sdmac->watermark_level; | |
820 | ||
821 | bd0->mode.command = C0_SETDM; | |
822 | bd0->mode.status = BD_DONE | BD_INTR | BD_WRAP | BD_EXTD; | |
823 | bd0->mode.count = sizeof(*context) / 4; | |
824 | bd0->buffer_addr = sdma->context_phys; | |
825 | bd0->ext_buffer_addr = 2048 + (sizeof(*context) / 4) * channel; | |
2ccaef05 | 826 | ret = sdma_run_channel0(sdma); |
1ec1e82f | 827 | |
2ccaef05 | 828 | spin_unlock_irqrestore(&sdma->channel_0_lock, flags); |
73eab978 | 829 | |
1ec1e82f SH |
830 | return ret; |
831 | } | |
832 | ||
833 | static void sdma_disable_channel(struct sdma_channel *sdmac) | |
834 | { | |
835 | struct sdma_engine *sdma = sdmac->sdma; | |
836 | int channel = sdmac->channel; | |
837 | ||
0bbc1413 | 838 | writel_relaxed(BIT(channel), sdma->regs + SDMA_H_STATSTOP); |
1ec1e82f SH |
839 | sdmac->status = DMA_ERROR; |
840 | } | |
841 | ||
842 | static int sdma_config_channel(struct sdma_channel *sdmac) | |
843 | { | |
844 | int ret; | |
845 | ||
846 | sdma_disable_channel(sdmac); | |
847 | ||
0bbc1413 RZ |
848 | sdmac->event_mask[0] = 0; |
849 | sdmac->event_mask[1] = 0; | |
1ec1e82f SH |
850 | sdmac->shp_addr = 0; |
851 | sdmac->per_addr = 0; | |
852 | ||
853 | if (sdmac->event_id0) { | |
17bba72f | 854 | if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events) |
1ec1e82f SH |
855 | return -EINVAL; |
856 | sdma_event_enable(sdmac, sdmac->event_id0); | |
857 | } | |
858 | ||
859 | switch (sdmac->peripheral_type) { | |
860 | case IMX_DMATYPE_DSP: | |
861 | sdma_config_ownership(sdmac, false, true, true); | |
862 | break; | |
863 | case IMX_DMATYPE_MEMORY: | |
864 | sdma_config_ownership(sdmac, false, true, false); | |
865 | break; | |
866 | default: | |
867 | sdma_config_ownership(sdmac, true, true, false); | |
868 | break; | |
869 | } | |
870 | ||
871 | sdma_get_pc(sdmac, sdmac->peripheral_type); | |
872 | ||
873 | if ((sdmac->peripheral_type != IMX_DMATYPE_MEMORY) && | |
874 | (sdmac->peripheral_type != IMX_DMATYPE_DSP)) { | |
875 | /* Handle multiple event channels differently */ | |
876 | if (sdmac->event_id1) { | |
0bbc1413 | 877 | sdmac->event_mask[1] = BIT(sdmac->event_id1 % 32); |
1ec1e82f | 878 | if (sdmac->event_id1 > 31) |
0bbc1413 RZ |
879 | __set_bit(31, &sdmac->watermark_level); |
880 | sdmac->event_mask[0] = BIT(sdmac->event_id0 % 32); | |
1ec1e82f | 881 | if (sdmac->event_id0 > 31) |
0bbc1413 | 882 | __set_bit(30, &sdmac->watermark_level); |
1ec1e82f | 883 | } else { |
0bbc1413 | 884 | __set_bit(sdmac->event_id0, sdmac->event_mask); |
1ec1e82f SH |
885 | } |
886 | /* Watermark Level */ | |
887 | sdmac->watermark_level |= sdmac->watermark_level; | |
888 | /* Address */ | |
889 | sdmac->shp_addr = sdmac->per_address; | |
890 | } else { | |
891 | sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */ | |
892 | } | |
893 | ||
894 | ret = sdma_load_context(sdmac); | |
895 | ||
896 | return ret; | |
897 | } | |
898 | ||
899 | static int sdma_set_channel_priority(struct sdma_channel *sdmac, | |
900 | unsigned int priority) | |
901 | { | |
902 | struct sdma_engine *sdma = sdmac->sdma; | |
903 | int channel = sdmac->channel; | |
904 | ||
905 | if (priority < MXC_SDMA_MIN_PRIORITY | |
906 | || priority > MXC_SDMA_MAX_PRIORITY) { | |
907 | return -EINVAL; | |
908 | } | |
909 | ||
c4b56857 | 910 | writel_relaxed(priority, sdma->regs + SDMA_CHNPRI_0 + 4 * channel); |
1ec1e82f SH |
911 | |
912 | return 0; | |
913 | } | |
914 | ||
915 | static int sdma_request_channel(struct sdma_channel *sdmac) | |
916 | { | |
917 | struct sdma_engine *sdma = sdmac->sdma; | |
918 | int channel = sdmac->channel; | |
919 | int ret = -EBUSY; | |
920 | ||
9f92d223 JP |
921 | sdmac->bd = dma_zalloc_coherent(NULL, PAGE_SIZE, &sdmac->bd_phys, |
922 | GFP_KERNEL); | |
1ec1e82f SH |
923 | if (!sdmac->bd) { |
924 | ret = -ENOMEM; | |
925 | goto out; | |
926 | } | |
927 | ||
1ec1e82f SH |
928 | sdma->channel_control[channel].base_bd_ptr = sdmac->bd_phys; |
929 | sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys; | |
930 | ||
1ec1e82f | 931 | sdma_set_channel_priority(sdmac, MXC_SDMA_DEFAULT_PRIORITY); |
1ec1e82f SH |
932 | return 0; |
933 | out: | |
934 | ||
935 | return ret; | |
936 | } | |
937 | ||
1ec1e82f SH |
938 | static struct sdma_channel *to_sdma_chan(struct dma_chan *chan) |
939 | { | |
940 | return container_of(chan, struct sdma_channel, chan); | |
941 | } | |
942 | ||
943 | static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx) | |
944 | { | |
f69f2e26 | 945 | unsigned long flags; |
1ec1e82f | 946 | struct sdma_channel *sdmac = to_sdma_chan(tx->chan); |
1ec1e82f SH |
947 | dma_cookie_t cookie; |
948 | ||
f69f2e26 | 949 | spin_lock_irqsave(&sdmac->lock, flags); |
1ec1e82f | 950 | |
884485e1 | 951 | cookie = dma_cookie_assign(tx); |
1ec1e82f | 952 | |
f69f2e26 | 953 | spin_unlock_irqrestore(&sdmac->lock, flags); |
1ec1e82f SH |
954 | |
955 | return cookie; | |
956 | } | |
957 | ||
958 | static int sdma_alloc_chan_resources(struct dma_chan *chan) | |
959 | { | |
960 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
961 | struct imx_dma_data *data = chan->private; | |
962 | int prio, ret; | |
963 | ||
1ec1e82f SH |
964 | if (!data) |
965 | return -EINVAL; | |
966 | ||
967 | switch (data->priority) { | |
968 | case DMA_PRIO_HIGH: | |
969 | prio = 3; | |
970 | break; | |
971 | case DMA_PRIO_MEDIUM: | |
972 | prio = 2; | |
973 | break; | |
974 | case DMA_PRIO_LOW: | |
975 | default: | |
976 | prio = 1; | |
977 | break; | |
978 | } | |
979 | ||
980 | sdmac->peripheral_type = data->peripheral_type; | |
981 | sdmac->event_id0 = data->dma_request; | |
c2c744d3 | 982 | |
7560e3f3 SH |
983 | clk_enable(sdmac->sdma->clk_ipg); |
984 | clk_enable(sdmac->sdma->clk_ahb); | |
c2c744d3 | 985 | |
3bb5e7ca | 986 | ret = sdma_request_channel(sdmac); |
1ec1e82f SH |
987 | if (ret) |
988 | return ret; | |
989 | ||
3bb5e7ca | 990 | ret = sdma_set_channel_priority(sdmac, prio); |
1ec1e82f SH |
991 | if (ret) |
992 | return ret; | |
993 | ||
994 | dma_async_tx_descriptor_init(&sdmac->desc, chan); | |
995 | sdmac->desc.tx_submit = sdma_tx_submit; | |
996 | /* txd.flags will be overwritten in prep funcs */ | |
997 | sdmac->desc.flags = DMA_CTRL_ACK; | |
998 | ||
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | static void sdma_free_chan_resources(struct dma_chan *chan) | |
1003 | { | |
1004 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1005 | struct sdma_engine *sdma = sdmac->sdma; | |
1006 | ||
1007 | sdma_disable_channel(sdmac); | |
1008 | ||
1009 | if (sdmac->event_id0) | |
1010 | sdma_event_disable(sdmac, sdmac->event_id0); | |
1011 | if (sdmac->event_id1) | |
1012 | sdma_event_disable(sdmac, sdmac->event_id1); | |
1013 | ||
1014 | sdmac->event_id0 = 0; | |
1015 | sdmac->event_id1 = 0; | |
1016 | ||
1017 | sdma_set_channel_priority(sdmac, 0); | |
1018 | ||
1019 | dma_free_coherent(NULL, PAGE_SIZE, sdmac->bd, sdmac->bd_phys); | |
1020 | ||
7560e3f3 SH |
1021 | clk_disable(sdma->clk_ipg); |
1022 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1023 | } |
1024 | ||
1025 | static struct dma_async_tx_descriptor *sdma_prep_slave_sg( | |
1026 | struct dma_chan *chan, struct scatterlist *sgl, | |
db8196df | 1027 | unsigned int sg_len, enum dma_transfer_direction direction, |
185ecb5f | 1028 | unsigned long flags, void *context) |
1ec1e82f SH |
1029 | { |
1030 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1031 | struct sdma_engine *sdma = sdmac->sdma; | |
1032 | int ret, i, count; | |
23889c63 | 1033 | int channel = sdmac->channel; |
1ec1e82f SH |
1034 | struct scatterlist *sg; |
1035 | ||
1036 | if (sdmac->status == DMA_IN_PROGRESS) | |
1037 | return NULL; | |
1038 | sdmac->status = DMA_IN_PROGRESS; | |
1039 | ||
1040 | sdmac->flags = 0; | |
1041 | ||
8e2e27c7 RZ |
1042 | sdmac->buf_tail = 0; |
1043 | ||
1ec1e82f SH |
1044 | dev_dbg(sdma->dev, "setting up %d entries for channel %d.\n", |
1045 | sg_len, channel); | |
1046 | ||
1047 | sdmac->direction = direction; | |
1048 | ret = sdma_load_context(sdmac); | |
1049 | if (ret) | |
1050 | goto err_out; | |
1051 | ||
1052 | if (sg_len > NUM_BD) { | |
1053 | dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n", | |
1054 | channel, sg_len, NUM_BD); | |
1055 | ret = -EINVAL; | |
1056 | goto err_out; | |
1057 | } | |
1058 | ||
ab59a510 | 1059 | sdmac->chn_count = 0; |
1ec1e82f SH |
1060 | for_each_sg(sgl, sg, sg_len, i) { |
1061 | struct sdma_buffer_descriptor *bd = &sdmac->bd[i]; | |
1062 | int param; | |
1063 | ||
d2f5c276 | 1064 | bd->buffer_addr = sg->dma_address; |
1ec1e82f | 1065 | |
fdaf9c4b | 1066 | count = sg_dma_len(sg); |
1ec1e82f SH |
1067 | |
1068 | if (count > 0xffff) { | |
1069 | dev_err(sdma->dev, "SDMA channel %d: maximum bytes for sg entry exceeded: %d > %d\n", | |
1070 | channel, count, 0xffff); | |
1071 | ret = -EINVAL; | |
1072 | goto err_out; | |
1073 | } | |
1074 | ||
1075 | bd->mode.count = count; | |
ab59a510 | 1076 | sdmac->chn_count += count; |
1ec1e82f SH |
1077 | |
1078 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) { | |
1079 | ret = -EINVAL; | |
1080 | goto err_out; | |
1081 | } | |
1fa81c27 SH |
1082 | |
1083 | switch (sdmac->word_size) { | |
1084 | case DMA_SLAVE_BUSWIDTH_4_BYTES: | |
1ec1e82f | 1085 | bd->mode.command = 0; |
1fa81c27 SH |
1086 | if (count & 3 || sg->dma_address & 3) |
1087 | return NULL; | |
1088 | break; | |
1089 | case DMA_SLAVE_BUSWIDTH_2_BYTES: | |
1090 | bd->mode.command = 2; | |
1091 | if (count & 1 || sg->dma_address & 1) | |
1092 | return NULL; | |
1093 | break; | |
1094 | case DMA_SLAVE_BUSWIDTH_1_BYTE: | |
1095 | bd->mode.command = 1; | |
1096 | break; | |
1097 | default: | |
1098 | return NULL; | |
1099 | } | |
1ec1e82f SH |
1100 | |
1101 | param = BD_DONE | BD_EXTD | BD_CONT; | |
1102 | ||
341b9419 | 1103 | if (i + 1 == sg_len) { |
1ec1e82f | 1104 | param |= BD_INTR; |
341b9419 SG |
1105 | param |= BD_LAST; |
1106 | param &= ~BD_CONT; | |
1ec1e82f SH |
1107 | } |
1108 | ||
c3cc74b2 OJ |
1109 | dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n", |
1110 | i, count, (u64)sg->dma_address, | |
1ec1e82f SH |
1111 | param & BD_WRAP ? "wrap" : "", |
1112 | param & BD_INTR ? " intr" : ""); | |
1113 | ||
1114 | bd->mode.status = param; | |
1115 | } | |
1116 | ||
1117 | sdmac->num_bd = sg_len; | |
1118 | sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys; | |
1119 | ||
1120 | return &sdmac->desc; | |
1121 | err_out: | |
4b2ce9dd | 1122 | sdmac->status = DMA_ERROR; |
1ec1e82f SH |
1123 | return NULL; |
1124 | } | |
1125 | ||
1126 | static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic( | |
1127 | struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, | |
185ecb5f | 1128 | size_t period_len, enum dma_transfer_direction direction, |
31c1e5a1 | 1129 | unsigned long flags) |
1ec1e82f SH |
1130 | { |
1131 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1132 | struct sdma_engine *sdma = sdmac->sdma; | |
1133 | int num_periods = buf_len / period_len; | |
23889c63 | 1134 | int channel = sdmac->channel; |
1ec1e82f SH |
1135 | int ret, i = 0, buf = 0; |
1136 | ||
1137 | dev_dbg(sdma->dev, "%s channel: %d\n", __func__, channel); | |
1138 | ||
1139 | if (sdmac->status == DMA_IN_PROGRESS) | |
1140 | return NULL; | |
1141 | ||
1142 | sdmac->status = DMA_IN_PROGRESS; | |
1143 | ||
8e2e27c7 | 1144 | sdmac->buf_tail = 0; |
d1a792f3 | 1145 | sdmac->period_len = period_len; |
8e2e27c7 | 1146 | |
1ec1e82f SH |
1147 | sdmac->flags |= IMX_DMA_SG_LOOP; |
1148 | sdmac->direction = direction; | |
1149 | ret = sdma_load_context(sdmac); | |
1150 | if (ret) | |
1151 | goto err_out; | |
1152 | ||
1153 | if (num_periods > NUM_BD) { | |
1154 | dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n", | |
1155 | channel, num_periods, NUM_BD); | |
1156 | goto err_out; | |
1157 | } | |
1158 | ||
1159 | if (period_len > 0xffff) { | |
1160 | dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %d > %d\n", | |
1161 | channel, period_len, 0xffff); | |
1162 | goto err_out; | |
1163 | } | |
1164 | ||
1165 | while (buf < buf_len) { | |
1166 | struct sdma_buffer_descriptor *bd = &sdmac->bd[i]; | |
1167 | int param; | |
1168 | ||
1169 | bd->buffer_addr = dma_addr; | |
1170 | ||
1171 | bd->mode.count = period_len; | |
1172 | ||
1173 | if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) | |
1174 | goto err_out; | |
1175 | if (sdmac->word_size == DMA_SLAVE_BUSWIDTH_4_BYTES) | |
1176 | bd->mode.command = 0; | |
1177 | else | |
1178 | bd->mode.command = sdmac->word_size; | |
1179 | ||
1180 | param = BD_DONE | BD_EXTD | BD_CONT | BD_INTR; | |
1181 | if (i + 1 == num_periods) | |
1182 | param |= BD_WRAP; | |
1183 | ||
c3cc74b2 OJ |
1184 | dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n", |
1185 | i, period_len, (u64)dma_addr, | |
1ec1e82f SH |
1186 | param & BD_WRAP ? "wrap" : "", |
1187 | param & BD_INTR ? " intr" : ""); | |
1188 | ||
1189 | bd->mode.status = param; | |
1190 | ||
1191 | dma_addr += period_len; | |
1192 | buf += period_len; | |
1193 | ||
1194 | i++; | |
1195 | } | |
1196 | ||
1197 | sdmac->num_bd = num_periods; | |
1198 | sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys; | |
1199 | ||
1200 | return &sdmac->desc; | |
1201 | err_out: | |
1202 | sdmac->status = DMA_ERROR; | |
1203 | return NULL; | |
1204 | } | |
1205 | ||
1206 | static int sdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, | |
1207 | unsigned long arg) | |
1208 | { | |
1209 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
1210 | struct dma_slave_config *dmaengine_cfg = (void *)arg; | |
1211 | ||
1212 | switch (cmd) { | |
1213 | case DMA_TERMINATE_ALL: | |
1214 | sdma_disable_channel(sdmac); | |
1215 | return 0; | |
1216 | case DMA_SLAVE_CONFIG: | |
db8196df | 1217 | if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) { |
1ec1e82f | 1218 | sdmac->per_address = dmaengine_cfg->src_addr; |
94ac27a5 PR |
1219 | sdmac->watermark_level = dmaengine_cfg->src_maxburst * |
1220 | dmaengine_cfg->src_addr_width; | |
1ec1e82f SH |
1221 | sdmac->word_size = dmaengine_cfg->src_addr_width; |
1222 | } else { | |
1223 | sdmac->per_address = dmaengine_cfg->dst_addr; | |
94ac27a5 PR |
1224 | sdmac->watermark_level = dmaengine_cfg->dst_maxburst * |
1225 | dmaengine_cfg->dst_addr_width; | |
1ec1e82f SH |
1226 | sdmac->word_size = dmaengine_cfg->dst_addr_width; |
1227 | } | |
e6966433 | 1228 | sdmac->direction = dmaengine_cfg->direction; |
1ec1e82f SH |
1229 | return sdma_config_channel(sdmac); |
1230 | default: | |
1231 | return -ENOSYS; | |
1232 | } | |
1233 | ||
1234 | return -EINVAL; | |
1235 | } | |
1236 | ||
1237 | static enum dma_status sdma_tx_status(struct dma_chan *chan, | |
e8e3a790 AS |
1238 | dma_cookie_t cookie, |
1239 | struct dma_tx_state *txstate) | |
1ec1e82f SH |
1240 | { |
1241 | struct sdma_channel *sdmac = to_sdma_chan(chan); | |
d1a792f3 RKAL |
1242 | u32 residue; |
1243 | ||
1244 | if (sdmac->flags & IMX_DMA_SG_LOOP) | |
1245 | residue = (sdmac->num_bd - sdmac->buf_tail) * sdmac->period_len; | |
1246 | else | |
1247 | residue = sdmac->chn_count - sdmac->chn_real_count; | |
1ec1e82f | 1248 | |
e8e3a790 | 1249 | dma_set_tx_state(txstate, chan->completed_cookie, chan->cookie, |
d1a792f3 | 1250 | residue); |
1ec1e82f | 1251 | |
8a965911 | 1252 | return sdmac->status; |
1ec1e82f SH |
1253 | } |
1254 | ||
1255 | static void sdma_issue_pending(struct dma_chan *chan) | |
1256 | { | |
2b4f130e SH |
1257 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
1258 | struct sdma_engine *sdma = sdmac->sdma; | |
1259 | ||
1260 | if (sdmac->status == DMA_IN_PROGRESS) | |
1261 | sdma_enable_channel(sdma, sdmac->channel); | |
1ec1e82f SH |
1262 | } |
1263 | ||
5b28aa31 | 1264 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34 |
cd72b846 | 1265 | #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2 38 |
5b28aa31 SH |
1266 | |
1267 | static void sdma_add_scripts(struct sdma_engine *sdma, | |
1268 | const struct sdma_script_start_addrs *addr) | |
1269 | { | |
1270 | s32 *addr_arr = (u32 *)addr; | |
1271 | s32 *saddr_arr = (u32 *)sdma->script_addrs; | |
1272 | int i; | |
1273 | ||
70dabaed NC |
1274 | /* use the default firmware in ROM if missing external firmware */ |
1275 | if (!sdma->script_number) | |
1276 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; | |
1277 | ||
cd72b846 | 1278 | for (i = 0; i < sdma->script_number; i++) |
5b28aa31 SH |
1279 | if (addr_arr[i] > 0) |
1280 | saddr_arr[i] = addr_arr[i]; | |
1281 | } | |
1282 | ||
7b4b88e0 | 1283 | static void sdma_load_firmware(const struct firmware *fw, void *context) |
5b28aa31 | 1284 | { |
7b4b88e0 | 1285 | struct sdma_engine *sdma = context; |
5b28aa31 | 1286 | const struct sdma_firmware_header *header; |
5b28aa31 SH |
1287 | const struct sdma_script_start_addrs *addr; |
1288 | unsigned short *ram_code; | |
1289 | ||
7b4b88e0 | 1290 | if (!fw) { |
0f927a11 SH |
1291 | dev_info(sdma->dev, "external firmware not found, using ROM firmware\n"); |
1292 | /* In this case we just use the ROM firmware. */ | |
7b4b88e0 SH |
1293 | return; |
1294 | } | |
5b28aa31 SH |
1295 | |
1296 | if (fw->size < sizeof(*header)) | |
1297 | goto err_firmware; | |
1298 | ||
1299 | header = (struct sdma_firmware_header *)fw->data; | |
1300 | ||
1301 | if (header->magic != SDMA_FIRMWARE_MAGIC) | |
1302 | goto err_firmware; | |
1303 | if (header->ram_code_start + header->ram_code_size > fw->size) | |
1304 | goto err_firmware; | |
cd72b846 NC |
1305 | switch (header->version_major) { |
1306 | case 1: | |
1307 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; | |
1308 | break; | |
1309 | case 2: | |
1310 | sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2; | |
1311 | break; | |
1312 | default: | |
1313 | dev_err(sdma->dev, "unknown firmware version\n"); | |
1314 | goto err_firmware; | |
1315 | } | |
5b28aa31 SH |
1316 | |
1317 | addr = (void *)header + header->script_addrs_start; | |
1318 | ram_code = (void *)header + header->ram_code_start; | |
1319 | ||
7560e3f3 SH |
1320 | clk_enable(sdma->clk_ipg); |
1321 | clk_enable(sdma->clk_ahb); | |
5b28aa31 SH |
1322 | /* download the RAM image for SDMA */ |
1323 | sdma_load_script(sdma, ram_code, | |
1324 | header->ram_code_size, | |
6866fd3b | 1325 | addr->ram_code_start_addr); |
7560e3f3 SH |
1326 | clk_disable(sdma->clk_ipg); |
1327 | clk_disable(sdma->clk_ahb); | |
5b28aa31 SH |
1328 | |
1329 | sdma_add_scripts(sdma, addr); | |
1330 | ||
1331 | dev_info(sdma->dev, "loaded firmware %d.%d\n", | |
1332 | header->version_major, | |
1333 | header->version_minor); | |
1334 | ||
1335 | err_firmware: | |
1336 | release_firmware(fw); | |
7b4b88e0 SH |
1337 | } |
1338 | ||
fe6cf289 | 1339 | static int sdma_get_firmware(struct sdma_engine *sdma, |
7b4b88e0 SH |
1340 | const char *fw_name) |
1341 | { | |
1342 | int ret; | |
1343 | ||
1344 | ret = request_firmware_nowait(THIS_MODULE, | |
1345 | FW_ACTION_HOTPLUG, fw_name, sdma->dev, | |
1346 | GFP_KERNEL, sdma, sdma_load_firmware); | |
5b28aa31 SH |
1347 | |
1348 | return ret; | |
1349 | } | |
1350 | ||
19bfc772 | 1351 | static int sdma_init(struct sdma_engine *sdma) |
1ec1e82f SH |
1352 | { |
1353 | int i, ret; | |
1354 | dma_addr_t ccb_phys; | |
1355 | ||
7560e3f3 SH |
1356 | clk_enable(sdma->clk_ipg); |
1357 | clk_enable(sdma->clk_ahb); | |
1ec1e82f SH |
1358 | |
1359 | /* Be sure SDMA has not started yet */ | |
c4b56857 | 1360 | writel_relaxed(0, sdma->regs + SDMA_H_C0PTR); |
1ec1e82f SH |
1361 | |
1362 | sdma->channel_control = dma_alloc_coherent(NULL, | |
1363 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control) + | |
1364 | sizeof(struct sdma_context_data), | |
1365 | &ccb_phys, GFP_KERNEL); | |
1366 | ||
1367 | if (!sdma->channel_control) { | |
1368 | ret = -ENOMEM; | |
1369 | goto err_dma_alloc; | |
1370 | } | |
1371 | ||
1372 | sdma->context = (void *)sdma->channel_control + | |
1373 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control); | |
1374 | sdma->context_phys = ccb_phys + | |
1375 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control); | |
1376 | ||
1377 | /* Zero-out the CCB structures array just allocated */ | |
1378 | memset(sdma->channel_control, 0, | |
1379 | MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control)); | |
1380 | ||
1381 | /* disable all channels */ | |
17bba72f | 1382 | for (i = 0; i < sdma->drvdata->num_events; i++) |
c4b56857 | 1383 | writel_relaxed(0, sdma->regs + chnenbl_ofs(sdma, i)); |
1ec1e82f SH |
1384 | |
1385 | /* All channels have priority 0 */ | |
1386 | for (i = 0; i < MAX_DMA_CHANNELS; i++) | |
c4b56857 | 1387 | writel_relaxed(0, sdma->regs + SDMA_CHNPRI_0 + i * 4); |
1ec1e82f SH |
1388 | |
1389 | ret = sdma_request_channel(&sdma->channel[0]); | |
1390 | if (ret) | |
1391 | goto err_dma_alloc; | |
1392 | ||
1393 | sdma_config_ownership(&sdma->channel[0], false, true, false); | |
1394 | ||
1395 | /* Set Command Channel (Channel Zero) */ | |
c4b56857 | 1396 | writel_relaxed(0x4050, sdma->regs + SDMA_CHN0ADDR); |
1ec1e82f SH |
1397 | |
1398 | /* Set bits of CONFIG register but with static context switching */ | |
1399 | /* FIXME: Check whether to set ACR bit depending on clock ratios */ | |
c4b56857 | 1400 | writel_relaxed(0, sdma->regs + SDMA_H_CONFIG); |
1ec1e82f | 1401 | |
c4b56857 | 1402 | writel_relaxed(ccb_phys, sdma->regs + SDMA_H_C0PTR); |
1ec1e82f | 1403 | |
1ec1e82f | 1404 | /* Set bits of CONFIG register with given context switching mode */ |
c4b56857 | 1405 | writel_relaxed(SDMA_H_CONFIG_CSM, sdma->regs + SDMA_H_CONFIG); |
1ec1e82f SH |
1406 | |
1407 | /* Initializes channel's priorities */ | |
1408 | sdma_set_channel_priority(&sdma->channel[0], 7); | |
1409 | ||
7560e3f3 SH |
1410 | clk_disable(sdma->clk_ipg); |
1411 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1412 | |
1413 | return 0; | |
1414 | ||
1415 | err_dma_alloc: | |
7560e3f3 SH |
1416 | clk_disable(sdma->clk_ipg); |
1417 | clk_disable(sdma->clk_ahb); | |
1ec1e82f SH |
1418 | dev_err(sdma->dev, "initialisation failed with %d\n", ret); |
1419 | return ret; | |
1420 | } | |
1421 | ||
9479e17c SG |
1422 | static bool sdma_filter_fn(struct dma_chan *chan, void *fn_param) |
1423 | { | |
0b351865 | 1424 | struct sdma_channel *sdmac = to_sdma_chan(chan); |
9479e17c SG |
1425 | struct imx_dma_data *data = fn_param; |
1426 | ||
1427 | if (!imx_dma_is_general_purpose(chan)) | |
1428 | return false; | |
1429 | ||
0b351865 NC |
1430 | sdmac->data = *data; |
1431 | chan->private = &sdmac->data; | |
9479e17c SG |
1432 | |
1433 | return true; | |
1434 | } | |
1435 | ||
1436 | static struct dma_chan *sdma_xlate(struct of_phandle_args *dma_spec, | |
1437 | struct of_dma *ofdma) | |
1438 | { | |
1439 | struct sdma_engine *sdma = ofdma->of_dma_data; | |
1440 | dma_cap_mask_t mask = sdma->dma_device.cap_mask; | |
1441 | struct imx_dma_data data; | |
1442 | ||
1443 | if (dma_spec->args_count != 3) | |
1444 | return NULL; | |
1445 | ||
1446 | data.dma_request = dma_spec->args[0]; | |
1447 | data.peripheral_type = dma_spec->args[1]; | |
1448 | data.priority = dma_spec->args[2]; | |
1449 | ||
1450 | return dma_request_channel(mask, sdma_filter_fn, &data); | |
1451 | } | |
1452 | ||
e34b731f | 1453 | static int sdma_probe(struct platform_device *pdev) |
1ec1e82f | 1454 | { |
580975d7 SG |
1455 | const struct of_device_id *of_id = |
1456 | of_match_device(sdma_dt_ids, &pdev->dev); | |
1457 | struct device_node *np = pdev->dev.of_node; | |
1458 | const char *fw_name; | |
1ec1e82f | 1459 | int ret; |
1ec1e82f | 1460 | int irq; |
1ec1e82f | 1461 | struct resource *iores; |
d4adcc01 | 1462 | struct sdma_platform_data *pdata = dev_get_platdata(&pdev->dev); |
1ec1e82f | 1463 | int i; |
1ec1e82f | 1464 | struct sdma_engine *sdma; |
36e2f21a | 1465 | s32 *saddr_arr; |
17bba72f SH |
1466 | const struct sdma_driver_data *drvdata = NULL; |
1467 | ||
1468 | if (of_id) | |
1469 | drvdata = of_id->data; | |
1470 | else if (pdev->id_entry) | |
1471 | drvdata = (void *)pdev->id_entry->driver_data; | |
1472 | ||
1473 | if (!drvdata) { | |
1474 | dev_err(&pdev->dev, "unable to find driver data\n"); | |
1475 | return -EINVAL; | |
1476 | } | |
1ec1e82f | 1477 | |
42536b9f PR |
1478 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
1479 | if (ret) | |
1480 | return ret; | |
1481 | ||
1ec1e82f SH |
1482 | sdma = kzalloc(sizeof(*sdma), GFP_KERNEL); |
1483 | if (!sdma) | |
1484 | return -ENOMEM; | |
1485 | ||
2ccaef05 | 1486 | spin_lock_init(&sdma->channel_0_lock); |
73eab978 | 1487 | |
1ec1e82f | 1488 | sdma->dev = &pdev->dev; |
17bba72f | 1489 | sdma->drvdata = drvdata; |
1ec1e82f SH |
1490 | |
1491 | iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1492 | irq = platform_get_irq(pdev, 0); | |
580975d7 | 1493 | if (!iores || irq < 0) { |
1ec1e82f SH |
1494 | ret = -EINVAL; |
1495 | goto err_irq; | |
1496 | } | |
1497 | ||
1498 | if (!request_mem_region(iores->start, resource_size(iores), pdev->name)) { | |
1499 | ret = -EBUSY; | |
1500 | goto err_request_region; | |
1501 | } | |
1502 | ||
7560e3f3 SH |
1503 | sdma->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); |
1504 | if (IS_ERR(sdma->clk_ipg)) { | |
1505 | ret = PTR_ERR(sdma->clk_ipg); | |
1ec1e82f SH |
1506 | goto err_clk; |
1507 | } | |
1508 | ||
7560e3f3 SH |
1509 | sdma->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); |
1510 | if (IS_ERR(sdma->clk_ahb)) { | |
1511 | ret = PTR_ERR(sdma->clk_ahb); | |
1512 | goto err_clk; | |
1513 | } | |
1514 | ||
1515 | clk_prepare(sdma->clk_ipg); | |
1516 | clk_prepare(sdma->clk_ahb); | |
1517 | ||
1ec1e82f SH |
1518 | sdma->regs = ioremap(iores->start, resource_size(iores)); |
1519 | if (!sdma->regs) { | |
1520 | ret = -ENOMEM; | |
1521 | goto err_ioremap; | |
1522 | } | |
1523 | ||
1524 | ret = request_irq(irq, sdma_int_handler, 0, "sdma", sdma); | |
1525 | if (ret) | |
1526 | goto err_request_irq; | |
1527 | ||
5b28aa31 | 1528 | sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL); |
1c1d9547 AL |
1529 | if (!sdma->script_addrs) { |
1530 | ret = -ENOMEM; | |
5b28aa31 | 1531 | goto err_alloc; |
1c1d9547 | 1532 | } |
1ec1e82f | 1533 | |
36e2f21a SH |
1534 | /* initially no scripts available */ |
1535 | saddr_arr = (s32 *)sdma->script_addrs; | |
1536 | for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++) | |
1537 | saddr_arr[i] = -EINVAL; | |
1538 | ||
7214a8b1 SH |
1539 | dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask); |
1540 | dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask); | |
1541 | ||
1ec1e82f SH |
1542 | INIT_LIST_HEAD(&sdma->dma_device.channels); |
1543 | /* Initialize channel parameters */ | |
1544 | for (i = 0; i < MAX_DMA_CHANNELS; i++) { | |
1545 | struct sdma_channel *sdmac = &sdma->channel[i]; | |
1546 | ||
1547 | sdmac->sdma = sdma; | |
1548 | spin_lock_init(&sdmac->lock); | |
1549 | ||
1ec1e82f | 1550 | sdmac->chan.device = &sdma->dma_device; |
8ac69546 | 1551 | dma_cookie_init(&sdmac->chan); |
1ec1e82f SH |
1552 | sdmac->channel = i; |
1553 | ||
abd9ccc8 HS |
1554 | tasklet_init(&sdmac->tasklet, sdma_tasklet, |
1555 | (unsigned long) sdmac); | |
23889c63 SH |
1556 | /* |
1557 | * Add the channel to the DMAC list. Do not add channel 0 though | |
1558 | * because we need it internally in the SDMA driver. This also means | |
1559 | * that channel 0 in dmaengine counting matches sdma channel 1. | |
1560 | */ | |
1561 | if (i) | |
1562 | list_add_tail(&sdmac->chan.device_node, | |
1563 | &sdma->dma_device.channels); | |
1ec1e82f SH |
1564 | } |
1565 | ||
5b28aa31 | 1566 | ret = sdma_init(sdma); |
1ec1e82f SH |
1567 | if (ret) |
1568 | goto err_init; | |
1569 | ||
dcfec3c0 SH |
1570 | if (sdma->drvdata->script_addrs) |
1571 | sdma_add_scripts(sdma, sdma->drvdata->script_addrs); | |
580975d7 | 1572 | if (pdata && pdata->script_addrs) |
5b28aa31 SH |
1573 | sdma_add_scripts(sdma, pdata->script_addrs); |
1574 | ||
580975d7 | 1575 | if (pdata) { |
6d0d7e2d FE |
1576 | ret = sdma_get_firmware(sdma, pdata->fw_name); |
1577 | if (ret) | |
ad1122e5 | 1578 | dev_warn(&pdev->dev, "failed to get firmware from platform data\n"); |
580975d7 SG |
1579 | } else { |
1580 | /* | |
1581 | * Because that device tree does not encode ROM script address, | |
1582 | * the RAM script in firmware is mandatory for device tree | |
1583 | * probe, otherwise it fails. | |
1584 | */ | |
1585 | ret = of_property_read_string(np, "fsl,sdma-ram-script-name", | |
1586 | &fw_name); | |
6602b0dd | 1587 | if (ret) |
ad1122e5 | 1588 | dev_warn(&pdev->dev, "failed to get firmware name\n"); |
6602b0dd FE |
1589 | else { |
1590 | ret = sdma_get_firmware(sdma, fw_name); | |
1591 | if (ret) | |
ad1122e5 | 1592 | dev_warn(&pdev->dev, "failed to get firmware from device tree\n"); |
580975d7 SG |
1593 | } |
1594 | } | |
5b28aa31 | 1595 | |
1ec1e82f SH |
1596 | sdma->dma_device.dev = &pdev->dev; |
1597 | ||
1598 | sdma->dma_device.device_alloc_chan_resources = sdma_alloc_chan_resources; | |
1599 | sdma->dma_device.device_free_chan_resources = sdma_free_chan_resources; | |
1600 | sdma->dma_device.device_tx_status = sdma_tx_status; | |
1601 | sdma->dma_device.device_prep_slave_sg = sdma_prep_slave_sg; | |
1602 | sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic; | |
1603 | sdma->dma_device.device_control = sdma_control; | |
1604 | sdma->dma_device.device_issue_pending = sdma_issue_pending; | |
b9b3f82f SH |
1605 | sdma->dma_device.dev->dma_parms = &sdma->dma_parms; |
1606 | dma_set_max_seg_size(sdma->dma_device.dev, 65535); | |
1ec1e82f | 1607 | |
23e11811 VR |
1608 | platform_set_drvdata(pdev, sdma); |
1609 | ||
1ec1e82f SH |
1610 | ret = dma_async_device_register(&sdma->dma_device); |
1611 | if (ret) { | |
1612 | dev_err(&pdev->dev, "unable to register\n"); | |
1613 | goto err_init; | |
1614 | } | |
1615 | ||
9479e17c SG |
1616 | if (np) { |
1617 | ret = of_dma_controller_register(np, sdma_xlate, sdma); | |
1618 | if (ret) { | |
1619 | dev_err(&pdev->dev, "failed to register controller\n"); | |
1620 | goto err_register; | |
1621 | } | |
1622 | } | |
1623 | ||
5b28aa31 | 1624 | dev_info(sdma->dev, "initialized\n"); |
1ec1e82f SH |
1625 | |
1626 | return 0; | |
1627 | ||
9479e17c SG |
1628 | err_register: |
1629 | dma_async_device_unregister(&sdma->dma_device); | |
1ec1e82f SH |
1630 | err_init: |
1631 | kfree(sdma->script_addrs); | |
5b28aa31 | 1632 | err_alloc: |
1ec1e82f SH |
1633 | free_irq(irq, sdma); |
1634 | err_request_irq: | |
1635 | iounmap(sdma->regs); | |
1636 | err_ioremap: | |
1ec1e82f SH |
1637 | err_clk: |
1638 | release_mem_region(iores->start, resource_size(iores)); | |
1639 | err_request_region: | |
1640 | err_irq: | |
1641 | kfree(sdma); | |
939fd4f0 | 1642 | return ret; |
1ec1e82f SH |
1643 | } |
1644 | ||
1d1bbd30 | 1645 | static int sdma_remove(struct platform_device *pdev) |
1ec1e82f | 1646 | { |
23e11811 VR |
1647 | struct sdma_engine *sdma = platform_get_drvdata(pdev); |
1648 | struct resource *iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1649 | int irq = platform_get_irq(pdev, 0); | |
c12fe497 | 1650 | int i; |
23e11811 VR |
1651 | |
1652 | dma_async_device_unregister(&sdma->dma_device); | |
1653 | kfree(sdma->script_addrs); | |
1654 | free_irq(irq, sdma); | |
1655 | iounmap(sdma->regs); | |
1656 | release_mem_region(iores->start, resource_size(iores)); | |
c12fe497 VR |
1657 | /* Kill the tasklet */ |
1658 | for (i = 0; i < MAX_DMA_CHANNELS; i++) { | |
1659 | struct sdma_channel *sdmac = &sdma->channel[i]; | |
1660 | ||
1661 | tasklet_kill(&sdmac->tasklet); | |
1662 | } | |
23e11811 VR |
1663 | kfree(sdma); |
1664 | ||
1665 | platform_set_drvdata(pdev, NULL); | |
1666 | dev_info(&pdev->dev, "Removed...\n"); | |
1667 | return 0; | |
1ec1e82f SH |
1668 | } |
1669 | ||
1670 | static struct platform_driver sdma_driver = { | |
1671 | .driver = { | |
1672 | .name = "imx-sdma", | |
580975d7 | 1673 | .of_match_table = sdma_dt_ids, |
1ec1e82f | 1674 | }, |
62550cd7 | 1675 | .id_table = sdma_devtypes, |
1d1bbd30 | 1676 | .remove = sdma_remove, |
23e11811 | 1677 | .probe = sdma_probe, |
1ec1e82f SH |
1678 | }; |
1679 | ||
23e11811 | 1680 | module_platform_driver(sdma_driver); |
1ec1e82f SH |
1681 | |
1682 | MODULE_AUTHOR("Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>"); | |
1683 | MODULE_DESCRIPTION("i.MX SDMA driver"); | |
1684 | MODULE_LICENSE("GPL"); |