1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * PRU-ICSS remoteproc driver for various TI SoCs |
4 | * |
5 | * Copyright (C) 2014-2022 Texas Instruments Incorporated - https://www.ti.com/ |
6 | * |
7 | * Author(s): |
8 | * Suman Anna <s-anna@ti.com> |
9 | * Andrew F. Davis <afd@ti.com> |
10 | * Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> for Texas Instruments |
11 | * Puranjay Mohan <p-mohan@ti.com> |
12 | * Md Danish Anwar <danishanwar@ti.com> |
13 | */ |
14 | |
15 | #include <linux/bitops.h> |
16 | #include <linux/debugfs.h> |
17 | #include <linux/irqdomain.h> |
18 | #include <linux/module.h> |
19 | #include <linux/of.h> |
20 | #include <linux/of_irq.h> |
21 | #include <linux/platform_device.h> |
22 | #include <linux/remoteproc/pruss.h> |
23 | #include <linux/pruss_driver.h> |
24 | #include <linux/remoteproc.h> |
25 | |
26 | #include "remoteproc_internal.h" |
27 | #include "remoteproc_elf_helpers.h" |
28 | #include "pru_rproc.h" |
29 | |
30 | /* PRU_ICSS_PRU_CTRL registers */ |
31 | #define PRU_CTRL_CTRL 0x0000 |
32 | #define PRU_CTRL_STS 0x0004 |
33 | #define PRU_CTRL_WAKEUP_EN 0x0008 |
34 | #define PRU_CTRL_CYCLE 0x000C |
35 | #define PRU_CTRL_STALL 0x0010 |
36 | #define PRU_CTRL_CTBIR0 0x0020 |
37 | #define PRU_CTRL_CTBIR1 0x0024 |
38 | #define PRU_CTRL_CTPPR0 0x0028 |
39 | #define PRU_CTRL_CTPPR1 0x002C |
40 | |
41 | /* CTRL register bit-fields */ |
42 | #define CTRL_CTRL_SOFT_RST_N BIT(0) |
43 | #define CTRL_CTRL_EN BIT(1) |
44 | #define CTRL_CTRL_SLEEPING BIT(2) |
45 | #define CTRL_CTRL_CTR_EN BIT(3) |
46 | #define CTRL_CTRL_SINGLE_STEP BIT(8) |
47 | #define CTRL_CTRL_RUNSTATE BIT(15) |
48 | |
49 | /* PRU_ICSS_PRU_DEBUG registers */ |
50 | #define PRU_DEBUG_GPREG(x) (0x0000 + (x) * 4) |
51 | #define PRU_DEBUG_CT_REG(x) (0x0080 + (x) * 4) |
52 | |
53 | /* PRU/RTU/Tx_PRU Core IRAM address masks */ |
54 | #define PRU_IRAM_ADDR_MASK 0x3ffff |
55 | #define PRU0_IRAM_ADDR_MASK 0x34000 |
56 | #define PRU1_IRAM_ADDR_MASK 0x38000 |
57 | #define RTU0_IRAM_ADDR_MASK 0x4000 |
58 | #define RTU1_IRAM_ADDR_MASK 0x6000 |
59 | #define TX_PRU0_IRAM_ADDR_MASK 0xa000 |
60 | #define TX_PRU1_IRAM_ADDR_MASK 0xc000 |
61 | |
62 | /* PRU device addresses for various type of PRU RAMs */ |
63 | #define PRU_IRAM_DA 0 /* Instruction RAM */ |
64 | #define PRU_PDRAM_DA 0 /* Primary Data RAM */ |
65 | #define PRU_SDRAM_DA 0x2000 /* Secondary Data RAM */ |
66 | #define PRU_SHRDRAM_DA 0x10000 /* Shared Data RAM */ |
67 | |
68 | #define MAX_PRU_SYS_EVENTS 160 |
69 | |
70 | /** |
71 | * enum pru_iomem - PRU core memory/register range identifiers |
72 | * |
73 | * @PRU_IOMEM_IRAM: PRU Instruction RAM range |
74 | * @PRU_IOMEM_CTRL: PRU Control register range |
75 | * @PRU_IOMEM_DEBUG: PRU Debug register range |
76 | * @PRU_IOMEM_MAX: just keep this one at the end |
77 | */ |
78 | enum pru_iomem { |
79 | PRU_IOMEM_IRAM = 0, |
80 | PRU_IOMEM_CTRL, |
81 | PRU_IOMEM_DEBUG, |
82 | PRU_IOMEM_MAX, |
83 | }; |
84 | |
85 | /** |
86 | * struct pru_private_data - device data for a PRU core |
87 | * @type: type of the PRU core (PRU, RTU, Tx_PRU) |
88 | * @is_k3: flag used to identify the need for special load handling |
89 | */ |
90 | struct pru_private_data { |
91 | enum pru_type type; |
92 | unsigned int is_k3 : 1; |
93 | }; |
94 | |
95 | /** |
96 | * struct pru_rproc - PRU remoteproc structure |
97 | * @id: id of the PRU core within the PRUSS |
98 | * @dev: PRU core device pointer |
99 | * @pruss: back-reference to parent PRUSS structure |
100 | * @rproc: remoteproc pointer for this PRU core |
101 | * @data: PRU core specific data |
102 | * @mem_regions: data for each of the PRU memory regions |
103 | * @client_np: client device node |
104 | * @lock: mutex to protect client usage |
105 | * @fw_name: name of firmware image used during loading |
106 | * @mapped_irq: virtual interrupt numbers of created fw specific mapping |
107 | * @pru_interrupt_map: pointer to interrupt mapping description (firmware) |
108 | * @pru_interrupt_map_sz: pru_interrupt_map size |
109 | * @rmw_lock: lock for read, modify, write operations on registers |
110 | * @dbg_single_step: debug state variable to set PRU into single step mode |
111 | * @dbg_continuous: debug state variable to restore PRU execution mode |
112 | * @evt_count: number of mapped events |
113 | * @gpmux_save: saved value for gpmux config |
114 | */ |
115 | struct pru_rproc { |
116 | int id; |
117 | struct device *dev; |
118 | struct pruss *pruss; |
119 | struct rproc *rproc; |
120 | const struct pru_private_data *data; |
121 | struct pruss_mem_region mem_regions[PRU_IOMEM_MAX]; |
122 | struct device_node *client_np; |
123 | struct mutex lock; |
124 | const char *fw_name; |
125 | unsigned int *mapped_irq; |
126 | struct pru_irq_rsc *pru_interrupt_map; |
127 | size_t pru_interrupt_map_sz; |
128 | spinlock_t rmw_lock; |
129 | u32 dbg_single_step; |
130 | u32 dbg_continuous; |
131 | u8 evt_count; |
132 | u8 gpmux_save; |
133 | }; |
134 | |
135 | static inline u32 pru_control_read_reg(struct pru_rproc *pru, unsigned int reg) |
136 | { |
137 | return readl_relaxed(pru->mem_regions[PRU_IOMEM_CTRL].va + reg); |
138 | } |
139 | |
140 | static inline |
141 | void pru_control_write_reg(struct pru_rproc *pru, unsigned int reg, u32 val) |
142 | { |
143 | writel_relaxed(val, pru->mem_regions[PRU_IOMEM_CTRL].va + reg); |
144 | } |
145 | |
146 | static inline |
147 | void pru_control_set_reg(struct pru_rproc *pru, unsigned int reg, |
148 | u32 mask, u32 set) |
149 | { |
150 | u32 val; |
151 | unsigned long flags; |
152 | |
153 | spin_lock_irqsave(&pru->rmw_lock, flags); |
154 | |
155 | val = pru_control_read_reg(pru, reg); |
156 | val &= ~mask; |
157 | val |= (set & mask); |
158 | pru_control_write_reg(pru, reg, val); |
159 | |
160 | spin_unlock_irqrestore(lock: &pru->rmw_lock, flags); |
161 | } |
162 | |
163 | /** |
164 | * pru_rproc_set_firmware() - set firmware for a PRU core |
165 | * @rproc: the rproc instance of the PRU |
166 | * @fw_name: the new firmware name, or NULL if default is desired |
167 | * |
168 | * Return: 0 on success, or errno in error case. |
169 | */ |
170 | static int pru_rproc_set_firmware(struct rproc *rproc, const char *fw_name) |
171 | { |
172 | struct pru_rproc *pru = rproc->priv; |
173 | |
174 | if (!fw_name) |
175 | fw_name = pru->fw_name; |
176 | |
177 | return rproc_set_firmware(rproc, fw_name); |
178 | } |
179 | |
180 | static struct rproc *__pru_rproc_get(struct device_node *np, int index) |
181 | { |
182 | struct rproc *rproc; |
183 | phandle rproc_phandle; |
184 | int ret; |
185 | |
186 | ret = of_property_read_u32_index(np, propname: "ti,prus" , index, out_value: &rproc_phandle); |
187 | if (ret) |
188 | return ERR_PTR(error: ret); |
189 | |
190 | rproc = rproc_get_by_phandle(phandle: rproc_phandle); |
191 | if (!rproc) { |
192 | ret = -EPROBE_DEFER; |
193 | return ERR_PTR(error: ret); |
194 | } |
195 | |
196 | /* make sure it is PRU rproc */ |
197 | if (!is_pru_rproc(dev: rproc->dev.parent)) { |
198 | rproc_put(rproc); |
199 | return ERR_PTR(error: -ENODEV); |
200 | } |
201 | |
202 | return rproc; |
203 | } |
204 | |
205 | /** |
206 | * pru_rproc_get() - get the PRU rproc instance from a device node |
207 | * @np: the user/client device node |
208 | * @index: index to use for the ti,prus property |
209 | * @pru_id: optional pointer to return the PRU remoteproc processor id |
210 | * |
211 | * This function looks through a client device node's "ti,prus" property at |
212 | * index @index and returns the rproc handle for a valid PRU remote processor if |
213 | * found. The function allows only one user to own the PRU rproc resource at a |
214 | * time. Caller must call pru_rproc_put() when done with using the rproc, not |
215 | * required if the function returns a failure. |
216 | * |
217 | * When optional @pru_id pointer is passed the PRU remoteproc processor id is |
218 | * returned. |
219 | * |
220 | * Return: rproc handle on success, and an ERR_PTR on failure using one |
221 | * of the following error values |
222 | * -ENODEV if device is not found |
223 | * -EBUSY if PRU is already acquired by anyone |
224 | * -EPROBE_DEFER is PRU device is not probed yet |
225 | */ |
226 | struct rproc *pru_rproc_get(struct device_node *np, int index, |
227 | enum pruss_pru_id *pru_id) |
228 | { |
229 | struct rproc *rproc; |
230 | struct pru_rproc *pru; |
231 | struct device *dev; |
232 | const char *fw_name; |
233 | int ret; |
234 | u32 mux; |
235 | |
236 | rproc = __pru_rproc_get(np, index); |
237 | if (IS_ERR(ptr: rproc)) |
238 | return rproc; |
239 | |
240 | pru = rproc->priv; |
241 | dev = &rproc->dev; |
242 | |
243 | mutex_lock(&pru->lock); |
244 | |
245 | if (pru->client_np) { |
246 | mutex_unlock(lock: &pru->lock); |
247 | ret = -EBUSY; |
248 | goto err_no_rproc_handle; |
249 | } |
250 | |
251 | pru->client_np = np; |
252 | rproc->sysfs_read_only = true; |
253 | |
254 | mutex_unlock(lock: &pru->lock); |
255 | |
256 | if (pru_id) |
257 | *pru_id = pru->id; |
258 | |
259 | ret = pruss_cfg_get_gpmux(pruss: pru->pruss, pru_id: pru->id, mux: &pru->gpmux_save); |
260 | if (ret) { |
261 | dev_err(dev, "failed to get cfg gpmux: %d\n" , ret); |
262 | goto err; |
263 | } |
264 | |
265 | /* An error here is acceptable for backward compatibility */ |
266 | ret = of_property_read_u32_index(np, propname: "ti,pruss-gp-mux-sel" , index, |
267 | out_value: &mux); |
268 | if (!ret) { |
269 | ret = pruss_cfg_set_gpmux(pruss: pru->pruss, pru_id: pru->id, mux); |
270 | if (ret) { |
271 | dev_err(dev, "failed to set cfg gpmux: %d\n" , ret); |
272 | goto err; |
273 | } |
274 | } |
275 | |
276 | ret = of_property_read_string_index(np, propname: "firmware-name" , index, |
277 | output: &fw_name); |
278 | if (!ret) { |
279 | ret = pru_rproc_set_firmware(rproc, fw_name); |
280 | if (ret) { |
281 | dev_err(dev, "failed to set firmware: %d\n" , ret); |
282 | goto err; |
283 | } |
284 | } |
285 | |
286 | return rproc; |
287 | |
288 | err_no_rproc_handle: |
289 | rproc_put(rproc); |
290 | return ERR_PTR(error: ret); |
291 | |
292 | err: |
293 | pru_rproc_put(rproc); |
294 | return ERR_PTR(error: ret); |
295 | } |
296 | EXPORT_SYMBOL_GPL(pru_rproc_get); |
297 | |
298 | /** |
299 | * pru_rproc_put() - release the PRU rproc resource |
300 | * @rproc: the rproc resource to release |
301 | * |
302 | * Releases the PRU rproc resource and makes it available to other |
303 | * users. |
304 | */ |
305 | void pru_rproc_put(struct rproc *rproc) |
306 | { |
307 | struct pru_rproc *pru; |
308 | |
309 | if (IS_ERR_OR_NULL(ptr: rproc) || !is_pru_rproc(dev: rproc->dev.parent)) |
310 | return; |
311 | |
312 | pru = rproc->priv; |
313 | |
314 | pruss_cfg_set_gpmux(pruss: pru->pruss, pru_id: pru->id, mux: pru->gpmux_save); |
315 | |
316 | pru_rproc_set_firmware(rproc, NULL); |
317 | |
318 | mutex_lock(&pru->lock); |
319 | |
320 | if (!pru->client_np) { |
321 | mutex_unlock(lock: &pru->lock); |
322 | return; |
323 | } |
324 | |
325 | pru->client_np = NULL; |
326 | rproc->sysfs_read_only = false; |
327 | mutex_unlock(lock: &pru->lock); |
328 | |
329 | rproc_put(rproc); |
330 | } |
331 | EXPORT_SYMBOL_GPL(pru_rproc_put); |
332 | |
333 | /** |
334 | * pru_rproc_set_ctable() - set the constant table index for the PRU |
335 | * @rproc: the rproc instance of the PRU |
336 | * @c: constant table index to set |
337 | * @addr: physical address to set it to |
338 | * |
339 | * Return: 0 on success, or errno in error case. |
340 | */ |
341 | int pru_rproc_set_ctable(struct rproc *rproc, enum pru_ctable_idx c, u32 addr) |
342 | { |
343 | struct pru_rproc *pru = rproc->priv; |
344 | unsigned int reg; |
345 | u32 mask, set; |
346 | u16 idx; |
347 | u16 idx_mask; |
348 | |
349 | if (IS_ERR_OR_NULL(ptr: rproc)) |
350 | return -EINVAL; |
351 | |
352 | if (!rproc->dev.parent || !is_pru_rproc(dev: rproc->dev.parent)) |
353 | return -ENODEV; |
354 | |
355 | /* pointer is 16 bit and index is 8-bit so mask out the rest */ |
356 | idx_mask = (c >= PRU_C28) ? 0xFFFF : 0xFF; |
357 | |
358 | /* ctable uses bit 8 and upwards only */ |
359 | idx = (addr >> 8) & idx_mask; |
360 | |
361 | /* configurable ctable (i.e. C24) starts at PRU_CTRL_CTBIR0 */ |
362 | reg = PRU_CTRL_CTBIR0 + 4 * (c >> 1); |
363 | mask = idx_mask << (16 * (c & 1)); |
364 | set = idx << (16 * (c & 1)); |
365 | |
366 | pru_control_set_reg(pru, reg, mask, set); |
367 | |
368 | return 0; |
369 | } |
370 | EXPORT_SYMBOL_GPL(pru_rproc_set_ctable); |
371 | |
372 | static inline u32 pru_debug_read_reg(struct pru_rproc *pru, unsigned int reg) |
373 | { |
374 | return readl_relaxed(pru->mem_regions[PRU_IOMEM_DEBUG].va + reg); |
375 | } |
376 | |
377 | static int regs_show(struct seq_file *s, void *data) |
378 | { |
379 | struct rproc *rproc = s->private; |
380 | struct pru_rproc *pru = rproc->priv; |
381 | int i, nregs = 32; |
382 | u32 pru_sts; |
383 | int pru_is_running; |
384 | |
385 | seq_puts(m: s, s: "============== Control Registers ==============\n" ); |
386 | seq_printf(m: s, fmt: "CTRL := 0x%08x\n" , |
387 | pru_control_read_reg(pru, PRU_CTRL_CTRL)); |
388 | pru_sts = pru_control_read_reg(pru, PRU_CTRL_STS); |
389 | seq_printf(m: s, fmt: "STS (PC) := 0x%08x (0x%08x)\n" , pru_sts, pru_sts << 2); |
390 | seq_printf(m: s, fmt: "WAKEUP_EN := 0x%08x\n" , |
391 | pru_control_read_reg(pru, PRU_CTRL_WAKEUP_EN)); |
392 | seq_printf(m: s, fmt: "CYCLE := 0x%08x\n" , |
393 | pru_control_read_reg(pru, PRU_CTRL_CYCLE)); |
394 | seq_printf(m: s, fmt: "STALL := 0x%08x\n" , |
395 | pru_control_read_reg(pru, PRU_CTRL_STALL)); |
396 | seq_printf(m: s, fmt: "CTBIR0 := 0x%08x\n" , |
397 | pru_control_read_reg(pru, PRU_CTRL_CTBIR0)); |
398 | seq_printf(m: s, fmt: "CTBIR1 := 0x%08x\n" , |
399 | pru_control_read_reg(pru, PRU_CTRL_CTBIR1)); |
400 | seq_printf(m: s, fmt: "CTPPR0 := 0x%08x\n" , |
401 | pru_control_read_reg(pru, PRU_CTRL_CTPPR0)); |
402 | seq_printf(m: s, fmt: "CTPPR1 := 0x%08x\n" , |
403 | pru_control_read_reg(pru, PRU_CTRL_CTPPR1)); |
404 | |
405 | seq_puts(m: s, s: "=============== Debug Registers ===============\n" ); |
406 | pru_is_running = pru_control_read_reg(pru, PRU_CTRL_CTRL) & |
407 | CTRL_CTRL_RUNSTATE; |
408 | if (pru_is_running) { |
409 | seq_puts(m: s, s: "PRU is executing, cannot print/access debug registers.\n" ); |
410 | return 0; |
411 | } |
412 | |
413 | for (i = 0; i < nregs; i++) { |
414 | seq_printf(m: s, fmt: "GPREG%-2d := 0x%08x\tCT_REG%-2d := 0x%08x\n" , |
415 | i, pru_debug_read_reg(pru, PRU_DEBUG_GPREG(i)), |
416 | i, pru_debug_read_reg(pru, PRU_DEBUG_CT_REG(i))); |
417 | } |
418 | |
419 | return 0; |
420 | } |
421 | DEFINE_SHOW_ATTRIBUTE(regs); |
422 | |
423 | /* |
424 | * Control PRU single-step mode |
425 | * |
426 | * This is a debug helper function used for controlling the single-step |
427 | * mode of the PRU. The PRU Debug registers are not accessible when the |
428 | * PRU is in RUNNING state. |
429 | * |
430 | * Writing a non-zero value sets the PRU into single-step mode irrespective |
431 | * of its previous state. The PRU mode is saved only on the first set into |
432 | * a single-step mode. Writing a zero value will restore the PRU into its |
433 | * original mode. |
434 | */ |
435 | static int pru_rproc_debug_ss_set(void *data, u64 val) |
436 | { |
437 | struct rproc *rproc = data; |
438 | struct pru_rproc *pru = rproc->priv; |
439 | u32 reg_val; |
440 | |
441 | val = val ? 1 : 0; |
442 | if (!val && !pru->dbg_single_step) |
443 | return 0; |
444 | |
445 | reg_val = pru_control_read_reg(pru, PRU_CTRL_CTRL); |
446 | |
447 | if (val && !pru->dbg_single_step) |
448 | pru->dbg_continuous = reg_val; |
449 | |
450 | if (val) |
451 | reg_val |= CTRL_CTRL_SINGLE_STEP | CTRL_CTRL_EN; |
452 | else |
453 | reg_val = pru->dbg_continuous; |
454 | |
455 | pru->dbg_single_step = val; |
456 | pru_control_write_reg(pru, PRU_CTRL_CTRL, val: reg_val); |
457 | |
458 | return 0; |
459 | } |
460 | |
461 | static int pru_rproc_debug_ss_get(void *data, u64 *val) |
462 | { |
463 | struct rproc *rproc = data; |
464 | struct pru_rproc *pru = rproc->priv; |
465 | |
466 | *val = pru->dbg_single_step; |
467 | |
468 | return 0; |
469 | } |
470 | DEFINE_DEBUGFS_ATTRIBUTE(pru_rproc_debug_ss_fops, pru_rproc_debug_ss_get, |
471 | pru_rproc_debug_ss_set, "%llu\n" ); |
472 | |
473 | /* |
474 | * Create PRU-specific debugfs entries |
475 | * |
476 | * The entries are created only if the parent remoteproc debugfs directory |
477 | * exists, and will be cleaned up by the remoteproc core. |
478 | */ |
479 | static void pru_rproc_create_debug_entries(struct rproc *rproc) |
480 | { |
481 | if (!rproc->dbg_dir) |
482 | return; |
483 | |
484 | debugfs_create_file(name: "regs" , mode: 0400, parent: rproc->dbg_dir, |
485 | data: rproc, fops: ®s_fops); |
486 | debugfs_create_file(name: "single_step" , mode: 0600, parent: rproc->dbg_dir, |
487 | data: rproc, fops: &pru_rproc_debug_ss_fops); |
488 | } |
489 | |
490 | static void pru_dispose_irq_mapping(struct pru_rproc *pru) |
491 | { |
492 | if (!pru->mapped_irq) |
493 | return; |
494 | |
495 | while (pru->evt_count) { |
496 | pru->evt_count--; |
497 | if (pru->mapped_irq[pru->evt_count] > 0) |
498 | irq_dispose_mapping(virq: pru->mapped_irq[pru->evt_count]); |
499 | } |
500 | |
501 | kfree(objp: pru->mapped_irq); |
502 | pru->mapped_irq = NULL; |
503 | } |
504 | |
505 | /* |
506 | * Parse the custom PRU interrupt map resource and configure the INTC |
507 | * appropriately. |
508 | */ |
509 | static int pru_handle_intrmap(struct rproc *rproc) |
510 | { |
511 | struct device *dev = rproc->dev.parent; |
512 | struct pru_rproc *pru = rproc->priv; |
513 | struct pru_irq_rsc *rsc = pru->pru_interrupt_map; |
514 | struct irq_fwspec fwspec; |
515 | struct device_node *parent, *irq_parent; |
516 | int i, ret = 0; |
517 | |
518 | /* not having pru_interrupt_map is not an error */ |
519 | if (!rsc) |
520 | return 0; |
521 | |
522 | /* currently supporting only type 0 */ |
523 | if (rsc->type != 0) { |
524 | dev_err(dev, "unsupported rsc type: %d\n" , rsc->type); |
525 | return -EINVAL; |
526 | } |
527 | |
528 | if (rsc->num_evts > MAX_PRU_SYS_EVENTS) |
529 | return -EINVAL; |
530 | |
531 | if (sizeof(*rsc) + rsc->num_evts * sizeof(struct pruss_int_map) != |
532 | pru->pru_interrupt_map_sz) |
533 | return -EINVAL; |
534 | |
535 | pru->evt_count = rsc->num_evts; |
536 | pru->mapped_irq = kcalloc(n: pru->evt_count, size: sizeof(unsigned int), |
537 | GFP_KERNEL); |
538 | if (!pru->mapped_irq) { |
539 | pru->evt_count = 0; |
540 | return -ENOMEM; |
541 | } |
542 | |
543 | /* |
544 | * parse and fill in system event to interrupt channel and |
545 | * channel-to-host mapping. The interrupt controller to be used |
546 | * for these mappings for a given PRU remoteproc is always its |
547 | * corresponding sibling PRUSS INTC node. |
548 | */ |
549 | parent = of_get_parent(node: dev_of_node(dev: pru->dev)); |
550 | if (!parent) { |
551 | kfree(objp: pru->mapped_irq); |
552 | pru->mapped_irq = NULL; |
553 | pru->evt_count = 0; |
554 | return -ENODEV; |
555 | } |
556 | |
557 | irq_parent = of_get_child_by_name(node: parent, name: "interrupt-controller" ); |
558 | of_node_put(node: parent); |
559 | if (!irq_parent) { |
560 | kfree(objp: pru->mapped_irq); |
561 | pru->mapped_irq = NULL; |
562 | pru->evt_count = 0; |
563 | return -ENODEV; |
564 | } |
565 | |
566 | fwspec.fwnode = of_node_to_fwnode(node: irq_parent); |
567 | fwspec.param_count = 3; |
568 | for (i = 0; i < pru->evt_count; i++) { |
569 | fwspec.param[0] = rsc->pru_intc_map[i].event; |
570 | fwspec.param[1] = rsc->pru_intc_map[i].chnl; |
571 | fwspec.param[2] = rsc->pru_intc_map[i].host; |
572 | |
573 | dev_dbg(dev, "mapping%d: event %d, chnl %d, host %d\n" , |
574 | i, fwspec.param[0], fwspec.param[1], fwspec.param[2]); |
575 | |
576 | pru->mapped_irq[i] = irq_create_fwspec_mapping(fwspec: &fwspec); |
577 | if (!pru->mapped_irq[i]) { |
578 | dev_err(dev, "failed to get virq for fw mapping %d: event %d chnl %d host %d\n" , |
579 | i, fwspec.param[0], fwspec.param[1], |
580 | fwspec.param[2]); |
581 | ret = -EINVAL; |
582 | goto map_fail; |
583 | } |
584 | } |
585 | of_node_put(node: irq_parent); |
586 | |
587 | return ret; |
588 | |
589 | map_fail: |
590 | pru_dispose_irq_mapping(pru); |
591 | of_node_put(node: irq_parent); |
592 | |
593 | return ret; |
594 | } |
595 | |
596 | static int pru_rproc_start(struct rproc *rproc) |
597 | { |
598 | struct device *dev = &rproc->dev; |
599 | struct pru_rproc *pru = rproc->priv; |
600 | const char *names[PRU_TYPE_MAX] = { "PRU" , "RTU" , "Tx_PRU" }; |
601 | u32 val; |
602 | int ret; |
603 | |
604 | dev_dbg(dev, "starting %s%d: entry-point = 0x%llx\n" , |
605 | names[pru->data->type], pru->id, (rproc->bootaddr >> 2)); |
606 | |
607 | ret = pru_handle_intrmap(rproc); |
608 | /* |
609 | * reset references to pru interrupt map - they will stop being valid |
610 | * after rproc_start returns |
611 | */ |
612 | pru->pru_interrupt_map = NULL; |
613 | pru->pru_interrupt_map_sz = 0; |
614 | if (ret) |
615 | return ret; |
616 | |
617 | val = CTRL_CTRL_EN | ((rproc->bootaddr >> 2) << 16); |
618 | pru_control_write_reg(pru, PRU_CTRL_CTRL, val); |
619 | |
620 | return 0; |
621 | } |
622 | |
623 | static int pru_rproc_stop(struct rproc *rproc) |
624 | { |
625 | struct device *dev = &rproc->dev; |
626 | struct pru_rproc *pru = rproc->priv; |
627 | const char *names[PRU_TYPE_MAX] = { "PRU" , "RTU" , "Tx_PRU" }; |
628 | u32 val; |
629 | |
630 | dev_dbg(dev, "stopping %s%d\n" , names[pru->data->type], pru->id); |
631 | |
632 | val = pru_control_read_reg(pru, PRU_CTRL_CTRL); |
633 | val &= ~CTRL_CTRL_EN; |
634 | pru_control_write_reg(pru, PRU_CTRL_CTRL, val); |
635 | |
636 | /* dispose irq mapping - new firmware can provide new mapping */ |
637 | pru_dispose_irq_mapping(pru); |
638 | |
639 | return 0; |
640 | } |
641 | |
642 | /* |
643 | * Convert PRU device address (data spaces only) to kernel virtual address. |
644 | * |
645 | * Each PRU has access to all data memories within the PRUSS, accessible at |
646 | * different ranges. So, look through both its primary and secondary Data |
647 | * RAMs as well as any shared Data RAM to convert a PRU device address to |
648 | * kernel virtual address. Data RAM0 is primary Data RAM for PRU0 and Data |
649 | * RAM1 is primary Data RAM for PRU1. |
650 | */ |
651 | static void *pru_d_da_to_va(struct pru_rproc *pru, u32 da, size_t len) |
652 | { |
653 | struct pruss_mem_region dram0, dram1, shrd_ram; |
654 | struct pruss *pruss = pru->pruss; |
655 | u32 offset; |
656 | void *va = NULL; |
657 | |
658 | if (len == 0) |
659 | return NULL; |
660 | |
661 | dram0 = pruss->mem_regions[PRUSS_MEM_DRAM0]; |
662 | dram1 = pruss->mem_regions[PRUSS_MEM_DRAM1]; |
663 | /* PRU1 has its local RAM addresses reversed */ |
664 | if (pru->id == PRUSS_PRU1) |
665 | swap(dram0, dram1); |
666 | shrd_ram = pruss->mem_regions[PRUSS_MEM_SHRD_RAM2]; |
667 | |
668 | if (da + len <= PRU_PDRAM_DA + dram0.size) { |
669 | offset = da - PRU_PDRAM_DA; |
670 | va = (__force void *)(dram0.va + offset); |
671 | } else if (da >= PRU_SDRAM_DA && |
672 | da + len <= PRU_SDRAM_DA + dram1.size) { |
673 | offset = da - PRU_SDRAM_DA; |
674 | va = (__force void *)(dram1.va + offset); |
675 | } else if (da >= PRU_SHRDRAM_DA && |
676 | da + len <= PRU_SHRDRAM_DA + shrd_ram.size) { |
677 | offset = da - PRU_SHRDRAM_DA; |
678 | va = (__force void *)(shrd_ram.va + offset); |
679 | } |
680 | |
681 | return va; |
682 | } |
683 | |
684 | /* |
685 | * Convert PRU device address (instruction space) to kernel virtual address. |
686 | * |
687 | * A PRU does not have an unified address space. Each PRU has its very own |
688 | * private Instruction RAM, and its device address is identical to that of |
689 | * its primary Data RAM device address. |
690 | */ |
691 | static void *pru_i_da_to_va(struct pru_rproc *pru, u32 da, size_t len) |
692 | { |
693 | u32 offset; |
694 | void *va = NULL; |
695 | |
696 | if (len == 0) |
697 | return NULL; |
698 | |
699 | /* |
700 | * GNU binutils do not support multiple address spaces. The GNU |
701 | * linker's default linker script places IRAM at an arbitrary high |
702 | * offset, in order to differentiate it from DRAM. Hence we need to |
703 | * strip the artificial offset in the IRAM addresses coming from the |
704 | * ELF file. |
705 | * |
706 | * The TI proprietary linker would never set those higher IRAM address |
707 | * bits anyway. PRU architecture limits the program counter to 16-bit |
708 | * word-address range. This in turn corresponds to 18-bit IRAM |
709 | * byte-address range for ELF. |
710 | * |
711 | * Two more bits are added just in case to make the final 20-bit mask. |
712 | * Idea is to have a safeguard in case TI decides to add banking |
713 | * in future SoCs. |
714 | */ |
715 | da &= 0xfffff; |
716 | |
717 | if (da + len <= PRU_IRAM_DA + pru->mem_regions[PRU_IOMEM_IRAM].size) { |
718 | offset = da - PRU_IRAM_DA; |
719 | va = (__force void *)(pru->mem_regions[PRU_IOMEM_IRAM].va + |
720 | offset); |
721 | } |
722 | |
723 | return va; |
724 | } |
725 | |
726 | /* |
727 | * Provide address translations for only PRU Data RAMs through the remoteproc |
728 | * core for any PRU client drivers. The PRU Instruction RAM access is restricted |
729 | * only to the PRU loader code. |
730 | */ |
731 | static void *pru_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem) |
732 | { |
733 | struct pru_rproc *pru = rproc->priv; |
734 | |
735 | return pru_d_da_to_va(pru, da, len); |
736 | } |
737 | |
738 | /* PRU-specific address translator used by PRU loader. */ |
739 | static void *pru_da_to_va(struct rproc *rproc, u64 da, size_t len, bool is_iram) |
740 | { |
741 | struct pru_rproc *pru = rproc->priv; |
742 | void *va; |
743 | |
744 | if (is_iram) |
745 | va = pru_i_da_to_va(pru, da, len); |
746 | else |
747 | va = pru_d_da_to_va(pru, da, len); |
748 | |
749 | return va; |
750 | } |
751 | |
752 | static struct rproc_ops pru_rproc_ops = { |
753 | .start = pru_rproc_start, |
754 | .stop = pru_rproc_stop, |
755 | .da_to_va = pru_rproc_da_to_va, |
756 | }; |
757 | |
758 | /* |
759 | * Custom memory copy implementation for ICSSG PRU/RTU/Tx_PRU Cores |
760 | * |
761 | * The ICSSG PRU/RTU/Tx_PRU cores have a memory copying issue with IRAM |
762 | * memories, that is not seen on previous generation SoCs. The data is reflected |
763 | * properly in the IRAM memories only for integer (4-byte) copies. Any unaligned |
764 | * copies result in all the other pre-existing bytes zeroed out within that |
765 | * 4-byte boundary, thereby resulting in wrong text/code in the IRAMs. Also, the |
766 | * IRAM memory port interface does not allow any 8-byte copies (as commonly used |
767 | * by ARM64 memcpy implementation) and throws an exception. The DRAM memory |
768 | * ports do not show this behavior. |
769 | */ |
770 | static int pru_rproc_memcpy(void *dest, const void *src, size_t count) |
771 | { |
772 | const u32 *s = src; |
773 | u32 *d = dest; |
774 | size_t size = count / 4; |
775 | u32 *tmp_src = NULL; |
776 | |
777 | /* |
778 | * TODO: relax limitation of 4-byte aligned dest addresses and copy |
779 | * sizes |
780 | */ |
781 | if ((long)dest % 4 || count % 4) |
782 | return -EINVAL; |
783 | |
784 | /* src offsets in ELF firmware image can be non-aligned */ |
785 | if ((long)src % 4) { |
786 | tmp_src = kmemdup(p: src, size: count, GFP_KERNEL); |
787 | if (!tmp_src) |
788 | return -ENOMEM; |
789 | s = tmp_src; |
790 | } |
791 | |
792 | while (size--) |
793 | *d++ = *s++; |
794 | |
795 | kfree(objp: tmp_src); |
796 | |
797 | return 0; |
798 | } |
799 | |
800 | static int |
801 | pru_rproc_load_elf_segments(struct rproc *rproc, const struct firmware *fw) |
802 | { |
803 | struct pru_rproc *pru = rproc->priv; |
804 | struct device *dev = &rproc->dev; |
805 | struct elf32_hdr *ehdr; |
806 | struct elf32_phdr *phdr; |
807 | int i, ret = 0; |
808 | const u8 *elf_data = fw->data; |
809 | |
810 | ehdr = (struct elf32_hdr *)elf_data; |
811 | phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff); |
812 | |
813 | /* go through the available ELF segments */ |
814 | for (i = 0; i < ehdr->e_phnum; i++, phdr++) { |
815 | u32 da = phdr->p_paddr; |
816 | u32 memsz = phdr->p_memsz; |
817 | u32 filesz = phdr->p_filesz; |
818 | u32 offset = phdr->p_offset; |
819 | bool is_iram; |
820 | void *ptr; |
821 | |
822 | if (phdr->p_type != PT_LOAD || !filesz) |
823 | continue; |
824 | |
825 | dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n" , |
826 | phdr->p_type, da, memsz, filesz); |
827 | |
828 | if (filesz > memsz) { |
829 | dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n" , |
830 | filesz, memsz); |
831 | ret = -EINVAL; |
832 | break; |
833 | } |
834 | |
835 | if (offset + filesz > fw->size) { |
836 | dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n" , |
837 | offset + filesz, fw->size); |
838 | ret = -EINVAL; |
839 | break; |
840 | } |
841 | |
842 | /* grab the kernel address for this device address */ |
843 | is_iram = phdr->p_flags & PF_X; |
844 | ptr = pru_da_to_va(rproc, da, len: memsz, is_iram); |
845 | if (!ptr) { |
846 | dev_err(dev, "bad phdr da 0x%x mem 0x%x\n" , da, memsz); |
847 | ret = -EINVAL; |
848 | break; |
849 | } |
850 | |
851 | if (pru->data->is_k3) { |
852 | ret = pru_rproc_memcpy(dest: ptr, src: elf_data + phdr->p_offset, |
853 | count: filesz); |
854 | if (ret) { |
855 | dev_err(dev, "PRU memory copy failed for da 0x%x memsz 0x%x\n" , |
856 | da, memsz); |
857 | break; |
858 | } |
859 | } else { |
860 | memcpy(ptr, elf_data + phdr->p_offset, filesz); |
861 | } |
862 | |
863 | /* skip the memzero logic performed by remoteproc ELF loader */ |
864 | } |
865 | |
866 | return ret; |
867 | } |
868 | |
869 | static const void * |
870 | pru_rproc_find_interrupt_map(struct device *dev, const struct firmware *fw) |
871 | { |
872 | struct elf32_shdr *shdr, *name_table_shdr; |
873 | const char *name_table; |
874 | const u8 *elf_data = fw->data; |
875 | struct elf32_hdr *ehdr = (struct elf32_hdr *)elf_data; |
876 | u16 shnum = ehdr->e_shnum; |
877 | u16 shstrndx = ehdr->e_shstrndx; |
878 | int i; |
879 | |
880 | /* first, get the section header */ |
881 | shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff); |
882 | /* compute name table section header entry in shdr array */ |
883 | name_table_shdr = shdr + shstrndx; |
884 | /* finally, compute the name table section address in elf */ |
885 | name_table = elf_data + name_table_shdr->sh_offset; |
886 | |
887 | for (i = 0; i < shnum; i++, shdr++) { |
888 | u32 size = shdr->sh_size; |
889 | u32 offset = shdr->sh_offset; |
890 | u32 name = shdr->sh_name; |
891 | |
892 | if (strcmp(name_table + name, ".pru_irq_map" )) |
893 | continue; |
894 | |
895 | /* make sure we have the entire irq map */ |
896 | if (offset + size > fw->size || offset + size < size) { |
897 | dev_err(dev, ".pru_irq_map section truncated\n" ); |
898 | return ERR_PTR(error: -EINVAL); |
899 | } |
900 | |
901 | /* make sure irq map has at least the header */ |
902 | if (sizeof(struct pru_irq_rsc) > size) { |
903 | dev_err(dev, "header-less .pru_irq_map section\n" ); |
904 | return ERR_PTR(error: -EINVAL); |
905 | } |
906 | |
907 | return shdr; |
908 | } |
909 | |
910 | dev_dbg(dev, "no .pru_irq_map section found for this fw\n" ); |
911 | |
912 | return NULL; |
913 | } |
914 | |
915 | /* |
916 | * Use a custom parse_fw callback function for dealing with PRU firmware |
917 | * specific sections. |
918 | * |
919 | * The firmware blob can contain optional ELF sections: .resource_table section |
920 | * and .pru_irq_map one. The second one contains the PRUSS interrupt mapping |
921 | * description, which needs to be setup before powering on the PRU core. To |
922 | * avoid RAM wastage this ELF section is not mapped to any ELF segment (by the |
923 | * firmware linker) and therefore is not loaded to PRU memory. |
924 | */ |
925 | static int pru_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw) |
926 | { |
927 | struct device *dev = &rproc->dev; |
928 | struct pru_rproc *pru = rproc->priv; |
929 | const u8 *elf_data = fw->data; |
930 | const void *shdr; |
931 | u8 class = fw_elf_get_class(fw); |
932 | u64 sh_offset; |
933 | int ret; |
934 | |
935 | /* load optional rsc table */ |
936 | ret = rproc_elf_load_rsc_table(rproc, fw); |
937 | if (ret == -EINVAL) |
938 | dev_dbg(&rproc->dev, "no resource table found for this fw\n" ); |
939 | else if (ret) |
940 | return ret; |
941 | |
942 | /* find .pru_interrupt_map section, not having it is not an error */ |
943 | shdr = pru_rproc_find_interrupt_map(dev, fw); |
944 | if (IS_ERR(ptr: shdr)) |
945 | return PTR_ERR(ptr: shdr); |
946 | |
947 | if (!shdr) |
948 | return 0; |
949 | |
950 | /* preserve pointer to PRU interrupt map together with it size */ |
951 | sh_offset = elf_shdr_get_sh_offset(class, arg: shdr); |
952 | pru->pru_interrupt_map = (struct pru_irq_rsc *)(elf_data + sh_offset); |
953 | pru->pru_interrupt_map_sz = elf_shdr_get_sh_size(class, arg: shdr); |
954 | |
955 | return 0; |
956 | } |
957 | |
958 | /* |
959 | * Compute PRU id based on the IRAM addresses. The PRU IRAMs are |
960 | * always at a particular offset within the PRUSS address space. |
961 | */ |
962 | static int pru_rproc_set_id(struct pru_rproc *pru) |
963 | { |
964 | int ret = 0; |
965 | |
966 | switch (pru->mem_regions[PRU_IOMEM_IRAM].pa & PRU_IRAM_ADDR_MASK) { |
967 | case TX_PRU0_IRAM_ADDR_MASK: |
968 | fallthrough; |
969 | case RTU0_IRAM_ADDR_MASK: |
970 | fallthrough; |
971 | case PRU0_IRAM_ADDR_MASK: |
972 | pru->id = PRUSS_PRU0; |
973 | break; |
974 | case TX_PRU1_IRAM_ADDR_MASK: |
975 | fallthrough; |
976 | case RTU1_IRAM_ADDR_MASK: |
977 | fallthrough; |
978 | case PRU1_IRAM_ADDR_MASK: |
979 | pru->id = PRUSS_PRU1; |
980 | break; |
981 | default: |
982 | ret = -EINVAL; |
983 | } |
984 | |
985 | return ret; |
986 | } |
987 | |
988 | static int pru_rproc_probe(struct platform_device *pdev) |
989 | { |
990 | struct device *dev = &pdev->dev; |
991 | struct device_node *np = dev->of_node; |
992 | struct platform_device *ppdev = to_platform_device(dev->parent); |
993 | struct pru_rproc *pru; |
994 | const char *fw_name; |
995 | struct rproc *rproc = NULL; |
996 | struct resource *res; |
997 | int i, ret; |
998 | const struct pru_private_data *data; |
999 | const char *mem_names[PRU_IOMEM_MAX] = { "iram" , "control" , "debug" }; |
1000 | |
1001 | data = of_device_get_match_data(dev: &pdev->dev); |
1002 | if (!data) |
1003 | return -ENODEV; |
1004 | |
1005 | ret = of_property_read_string(np, propname: "firmware-name" , out_string: &fw_name); |
1006 | if (ret) { |
1007 | dev_err(dev, "unable to retrieve firmware-name %d\n" , ret); |
1008 | return ret; |
1009 | } |
1010 | |
1011 | rproc = devm_rproc_alloc(dev, name: pdev->name, ops: &pru_rproc_ops, firmware: fw_name, |
1012 | len: sizeof(*pru)); |
1013 | if (!rproc) { |
1014 | dev_err(dev, "rproc_alloc failed\n" ); |
1015 | return -ENOMEM; |
1016 | } |
1017 | /* use a custom load function to deal with PRU-specific quirks */ |
1018 | rproc->ops->load = pru_rproc_load_elf_segments; |
1019 | |
1020 | /* use a custom parse function to deal with PRU-specific resources */ |
1021 | rproc->ops->parse_fw = pru_rproc_parse_fw; |
1022 | |
1023 | /* error recovery is not supported for PRUs */ |
1024 | rproc->recovery_disabled = true; |
1025 | |
1026 | /* |
1027 | * rproc_add will auto-boot the processor normally, but this is not |
1028 | * desired with PRU client driven boot-flow methodology. A PRU |
1029 | * application/client driver will boot the corresponding PRU |
1030 | * remote-processor as part of its state machine either through the |
1031 | * remoteproc sysfs interface or through the equivalent kernel API. |
1032 | */ |
1033 | rproc->auto_boot = false; |
1034 | |
1035 | pru = rproc->priv; |
1036 | pru->dev = dev; |
1037 | pru->data = data; |
1038 | pru->pruss = platform_get_drvdata(pdev: ppdev); |
1039 | pru->rproc = rproc; |
1040 | pru->fw_name = fw_name; |
1041 | pru->client_np = NULL; |
1042 | spin_lock_init(&pru->rmw_lock); |
1043 | mutex_init(&pru->lock); |
1044 | |
1045 | for (i = 0; i < ARRAY_SIZE(mem_names); i++) { |
1046 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
1047 | mem_names[i]); |
1048 | pru->mem_regions[i].va = devm_ioremap_resource(dev, res); |
1049 | if (IS_ERR(ptr: pru->mem_regions[i].va)) { |
1050 | dev_err(dev, "failed to parse and map memory resource %d %s\n" , |
1051 | i, mem_names[i]); |
1052 | ret = PTR_ERR(ptr: pru->mem_regions[i].va); |
1053 | return ret; |
1054 | } |
1055 | pru->mem_regions[i].pa = res->start; |
1056 | pru->mem_regions[i].size = resource_size(res); |
1057 | |
1058 | dev_dbg(dev, "memory %8s: pa %pa size 0x%zx va %pK\n" , |
1059 | mem_names[i], &pru->mem_regions[i].pa, |
1060 | pru->mem_regions[i].size, pru->mem_regions[i].va); |
1061 | } |
1062 | |
1063 | ret = pru_rproc_set_id(pru); |
1064 | if (ret < 0) |
1065 | return ret; |
1066 | |
1067 | platform_set_drvdata(pdev, data: rproc); |
1068 | |
1069 | ret = devm_rproc_add(dev, rproc: pru->rproc); |
1070 | if (ret) { |
1071 | dev_err(dev, "rproc_add failed: %d\n" , ret); |
1072 | return ret; |
1073 | } |
1074 | |
1075 | pru_rproc_create_debug_entries(rproc); |
1076 | |
1077 | dev_dbg(dev, "PRU rproc node %pOF probed successfully\n" , np); |
1078 | |
1079 | return 0; |
1080 | } |
1081 | |
1082 | static void pru_rproc_remove(struct platform_device *pdev) |
1083 | { |
1084 | struct device *dev = &pdev->dev; |
1085 | struct rproc *rproc = platform_get_drvdata(pdev); |
1086 | |
1087 | dev_dbg(dev, "%s: removing rproc %s\n" , __func__, rproc->name); |
1088 | } |
1089 | |
1090 | static const struct pru_private_data pru_data = { |
1091 | .type = PRU_TYPE_PRU, |
1092 | }; |
1093 | |
1094 | static const struct pru_private_data k3_pru_data = { |
1095 | .type = PRU_TYPE_PRU, |
1096 | .is_k3 = 1, |
1097 | }; |
1098 | |
1099 | static const struct pru_private_data k3_rtu_data = { |
1100 | .type = PRU_TYPE_RTU, |
1101 | .is_k3 = 1, |
1102 | }; |
1103 | |
1104 | static const struct pru_private_data k3_tx_pru_data = { |
1105 | .type = PRU_TYPE_TX_PRU, |
1106 | .is_k3 = 1, |
1107 | }; |
1108 | |
1109 | static const struct of_device_id pru_rproc_match[] = { |
1110 | { .compatible = "ti,am3356-pru" , .data = &pru_data }, |
1111 | { .compatible = "ti,am4376-pru" , .data = &pru_data }, |
1112 | { .compatible = "ti,am5728-pru" , .data = &pru_data }, |
1113 | { .compatible = "ti,am642-pru" , .data = &k3_pru_data }, |
1114 | { .compatible = "ti,am642-rtu" , .data = &k3_rtu_data }, |
1115 | { .compatible = "ti,am642-tx-pru" , .data = &k3_tx_pru_data }, |
1116 | { .compatible = "ti,k2g-pru" , .data = &pru_data }, |
1117 | { .compatible = "ti,am654-pru" , .data = &k3_pru_data }, |
1118 | { .compatible = "ti,am654-rtu" , .data = &k3_rtu_data }, |
1119 | { .compatible = "ti,am654-tx-pru" , .data = &k3_tx_pru_data }, |
1120 | { .compatible = "ti,j721e-pru" , .data = &k3_pru_data }, |
1121 | { .compatible = "ti,j721e-rtu" , .data = &k3_rtu_data }, |
1122 | { .compatible = "ti,j721e-tx-pru" , .data = &k3_tx_pru_data }, |
1123 | { .compatible = "ti,am625-pru" , .data = &k3_pru_data }, |
1124 | {}, |
1125 | }; |
1126 | MODULE_DEVICE_TABLE(of, pru_rproc_match); |
1127 | |
1128 | static struct platform_driver pru_rproc_driver = { |
1129 | .driver = { |
1130 | .name = PRU_RPROC_DRVNAME, |
1131 | .of_match_table = pru_rproc_match, |
1132 | .suppress_bind_attrs = true, |
1133 | }, |
1134 | .probe = pru_rproc_probe, |
1135 | .remove_new = pru_rproc_remove, |
1136 | }; |
1137 | module_platform_driver(pru_rproc_driver); |
1138 | |
1139 | MODULE_AUTHOR("Suman Anna <s-anna@ti.com>" ); |
1140 | MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>" ); |
1141 | MODULE_AUTHOR("Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>" ); |
1142 | MODULE_AUTHOR("Puranjay Mohan <p-mohan@ti.com>" ); |
1143 | MODULE_AUTHOR("Md Danish Anwar <danishanwar@ti.com>" ); |
1144 | MODULE_DESCRIPTION("PRU-ICSS Remote Processor Driver" ); |
1145 | MODULE_LICENSE("GPL v2" ); |
1146 | |