| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * OMAP Remote Processor driver |
| 4 | * |
| 5 | * Copyright (C) 2011-2020 Texas Instruments Incorporated - http://www.ti.com/ |
| 6 | * Copyright (C) 2011 Google, Inc. |
| 7 | * |
| 8 | * Ohad Ben-Cohen <ohad@wizery.com> |
| 9 | * Brian Swetland <swetland@google.com> |
| 10 | * Fernando Guzman Lugo <fernando.lugo@ti.com> |
| 11 | * Mark Grosen <mgrosen@ti.com> |
| 12 | * Suman Anna <s-anna@ti.com> |
| 13 | * Hari Kanigeri <h-kanigeri2@ti.com> |
| 14 | */ |
| 15 | |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/clk.h> |
| 19 | #include <linux/clk/ti.h> |
| 20 | #include <linux/err.h> |
| 21 | #include <linux/io.h> |
| 22 | #include <linux/of.h> |
| 23 | #include <linux/of_platform.h> |
| 24 | #include <linux/of_reserved_mem.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/pm_runtime.h> |
| 27 | #include <linux/dma-mapping.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/remoteproc.h> |
| 30 | #include <linux/mailbox_client.h> |
| 31 | #include <linux/omap-iommu.h> |
| 32 | #include <linux/omap-mailbox.h> |
| 33 | #include <linux/regmap.h> |
| 34 | #include <linux/mfd/syscon.h> |
| 35 | #include <linux/reset.h> |
| 36 | #include <clocksource/timer-ti-dm.h> |
| 37 | |
| 38 | #include <linux/platform_data/dmtimer-omap.h> |
| 39 | |
| 40 | #include "omap_remoteproc.h" |
| 41 | #include "remoteproc_internal.h" |
| 42 | |
| 43 | /* default auto-suspend delay (ms) */ |
| 44 | #define DEFAULT_AUTOSUSPEND_DELAY 10000 |
| 45 | |
| 46 | /** |
| 47 | * struct omap_rproc_boot_data - boot data structure for the DSP omap rprocs |
| 48 | * @syscon: regmap handle for the system control configuration module |
| 49 | * @boot_reg: boot register offset within the @syscon regmap |
| 50 | * @boot_reg_shift: bit-field shift required for the boot address value in |
| 51 | * @boot_reg |
| 52 | */ |
| 53 | struct omap_rproc_boot_data { |
| 54 | struct regmap *syscon; |
| 55 | unsigned int boot_reg; |
| 56 | unsigned int boot_reg_shift; |
| 57 | }; |
| 58 | |
| 59 | /** |
| 60 | * struct omap_rproc_mem - internal memory structure |
| 61 | * @cpu_addr: MPU virtual address of the memory region |
| 62 | * @bus_addr: bus address used to access the memory region |
| 63 | * @dev_addr: device address of the memory region from DSP view |
| 64 | * @size: size of the memory region |
| 65 | */ |
| 66 | struct omap_rproc_mem { |
| 67 | void __iomem *cpu_addr; |
| 68 | phys_addr_t bus_addr; |
| 69 | u32 dev_addr; |
| 70 | size_t size; |
| 71 | }; |
| 72 | |
| 73 | /** |
| 74 | * struct omap_rproc_timer - data structure for a timer used by a omap rproc |
| 75 | * @odt: timer pointer |
| 76 | * @timer_ops: OMAP dmtimer ops for @odt timer |
| 77 | * @irq: timer irq |
| 78 | */ |
| 79 | struct omap_rproc_timer { |
| 80 | struct omap_dm_timer *odt; |
| 81 | const struct omap_dm_timer_ops *timer_ops; |
| 82 | int irq; |
| 83 | }; |
| 84 | |
| 85 | /** |
| 86 | * struct omap_rproc - omap remote processor state |
| 87 | * @mbox: mailbox channel handle |
| 88 | * @client: mailbox client to request the mailbox channel |
| 89 | * @boot_data: boot data structure for setting processor boot address |
| 90 | * @mem: internal memory regions data |
| 91 | * @num_mems: number of internal memory regions |
| 92 | * @num_timers: number of rproc timer(s) |
| 93 | * @num_wd_timers: number of rproc watchdog timers |
| 94 | * @timers: timer(s) info used by rproc |
| 95 | * @autosuspend_delay: auto-suspend delay value to be used for runtime pm |
| 96 | * @need_resume: if true a resume is needed in the system resume callback |
| 97 | * @rproc: rproc handle |
| 98 | * @reset: reset handle |
| 99 | * @pm_comp: completion primitive to sync for suspend response |
| 100 | * @fck: functional clock for the remoteproc |
| 101 | * @suspend_acked: state machine flag to store the suspend request ack |
| 102 | */ |
| 103 | struct omap_rproc { |
| 104 | struct mbox_chan *mbox; |
| 105 | struct mbox_client client; |
| 106 | struct omap_rproc_boot_data *boot_data; |
| 107 | struct omap_rproc_mem *mem; |
| 108 | int num_mems; |
| 109 | int num_timers; |
| 110 | int num_wd_timers; |
| 111 | struct omap_rproc_timer *timers; |
| 112 | int autosuspend_delay; |
| 113 | bool need_resume; |
| 114 | struct rproc *rproc; |
| 115 | struct reset_control *reset; |
| 116 | struct completion pm_comp; |
| 117 | struct clk *fck; |
| 118 | bool suspend_acked; |
| 119 | }; |
| 120 | |
| 121 | /** |
| 122 | * struct omap_rproc_mem_data - memory definitions for an omap remote processor |
| 123 | * @name: name for this memory entry |
| 124 | * @dev_addr: device address for the memory entry |
| 125 | */ |
| 126 | struct omap_rproc_mem_data { |
| 127 | const char *name; |
| 128 | const u32 dev_addr; |
| 129 | }; |
| 130 | |
| 131 | /** |
| 132 | * struct omap_rproc_dev_data - device data for the omap remote processor |
| 133 | * @device_name: device name of the remote processor |
| 134 | * @mems: memory definitions for this remote processor |
| 135 | */ |
| 136 | struct omap_rproc_dev_data { |
| 137 | const char *device_name; |
| 138 | const struct omap_rproc_mem_data *mems; |
| 139 | }; |
| 140 | |
| 141 | /** |
| 142 | * omap_rproc_request_timer() - request a timer for a remoteproc |
| 143 | * @dev: device requesting the timer |
| 144 | * @np: device node pointer to the desired timer |
| 145 | * @timer: handle to a struct omap_rproc_timer to return the timer handle |
| 146 | * |
| 147 | * This helper function is used primarily to request a timer associated with |
| 148 | * a remoteproc. The returned handle is stored in the .odt field of the |
| 149 | * @timer structure passed in, and is used to invoke other timer specific |
| 150 | * ops (like starting a timer either during device initialization or during |
| 151 | * a resume operation, or for stopping/freeing a timer). |
| 152 | * |
| 153 | * Return: 0 on success, otherwise an appropriate failure |
| 154 | */ |
| 155 | static int omap_rproc_request_timer(struct device *dev, struct device_node *np, |
| 156 | struct omap_rproc_timer *timer) |
| 157 | { |
| 158 | int ret; |
| 159 | |
| 160 | timer->odt = timer->timer_ops->request_by_node(np); |
| 161 | if (!timer->odt) { |
| 162 | dev_err(dev, "request for timer node %p failed\n", np); |
| 163 | return -EBUSY; |
| 164 | } |
| 165 | |
| 166 | ret = timer->timer_ops->set_source(timer->odt, OMAP_TIMER_SRC_SYS_CLK); |
| 167 | if (ret) { |
| 168 | dev_err(dev, "error setting OMAP_TIMER_SRC_SYS_CLK as source for timer node %p\n", |
| 169 | np); |
| 170 | timer->timer_ops->free(timer->odt); |
| 171 | return ret; |
| 172 | } |
| 173 | |
| 174 | /* clean counter, remoteproc code will set the value */ |
| 175 | timer->timer_ops->set_load(timer->odt, 0); |
| 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * omap_rproc_start_timer() - start a timer for a remoteproc |
| 182 | * @timer: handle to a OMAP rproc timer |
| 183 | * |
| 184 | * This helper function is used to start a timer associated with a remoteproc, |
| 185 | * obtained using the request_timer ops. The helper function needs to be |
| 186 | * invoked by the driver to start the timer (during device initialization) |
| 187 | * or to just resume the timer. |
| 188 | * |
| 189 | * Return: 0 on success, otherwise a failure as returned by DMTimer ops |
| 190 | */ |
| 191 | static inline int omap_rproc_start_timer(struct omap_rproc_timer *timer) |
| 192 | { |
| 193 | return timer->timer_ops->start(timer->odt); |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * omap_rproc_stop_timer() - stop a timer for a remoteproc |
| 198 | * @timer: handle to a OMAP rproc timer |
| 199 | * |
| 200 | * This helper function is used to disable a timer associated with a |
| 201 | * remoteproc, and needs to be called either during a device shutdown |
| 202 | * or suspend operation. The separate helper function allows the driver |
| 203 | * to just stop a timer without having to release the timer during a |
| 204 | * suspend operation. |
| 205 | * |
| 206 | * Return: 0 on success, otherwise a failure as returned by DMTimer ops |
| 207 | */ |
| 208 | static inline int omap_rproc_stop_timer(struct omap_rproc_timer *timer) |
| 209 | { |
| 210 | return timer->timer_ops->stop(timer->odt); |
| 211 | } |
| 212 | |
| 213 | /** |
| 214 | * omap_rproc_release_timer() - release a timer for a remoteproc |
| 215 | * @timer: handle to a OMAP rproc timer |
| 216 | * |
| 217 | * This helper function is used primarily to release a timer associated |
| 218 | * with a remoteproc. The dmtimer will be available for other clients to |
| 219 | * use once released. |
| 220 | * |
| 221 | * Return: 0 on success, otherwise a failure as returned by DMTimer ops |
| 222 | */ |
| 223 | static inline int omap_rproc_release_timer(struct omap_rproc_timer *timer) |
| 224 | { |
| 225 | return timer->timer_ops->free(timer->odt); |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * omap_rproc_get_timer_irq() - get the irq for a timer |
| 230 | * @timer: handle to a OMAP rproc timer |
| 231 | * |
| 232 | * This function is used to get the irq associated with a watchdog timer. The |
| 233 | * function is called by the OMAP remoteproc driver to register a interrupt |
| 234 | * handler to handle watchdog events on the remote processor. |
| 235 | * |
| 236 | * Return: irq id on success, otherwise a failure as returned by DMTimer ops |
| 237 | */ |
| 238 | static inline int omap_rproc_get_timer_irq(struct omap_rproc_timer *timer) |
| 239 | { |
| 240 | return timer->timer_ops->get_irq(timer->odt); |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * omap_rproc_ack_timer_irq() - acknowledge a timer irq |
| 245 | * @timer: handle to a OMAP rproc timer |
| 246 | * |
| 247 | * This function is used to clear the irq associated with a watchdog timer. |
| 248 | * The function is called by the OMAP remoteproc upon a watchdog event on the |
| 249 | * remote processor to clear the interrupt status of the watchdog timer. |
| 250 | */ |
| 251 | static inline void omap_rproc_ack_timer_irq(struct omap_rproc_timer *timer) |
| 252 | { |
| 253 | timer->timer_ops->write_status(timer->odt, OMAP_TIMER_INT_OVERFLOW); |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * omap_rproc_watchdog_isr() - Watchdog ISR handler for remoteproc device |
| 258 | * @irq: IRQ number associated with a watchdog timer |
| 259 | * @data: IRQ handler data |
| 260 | * |
| 261 | * This ISR routine executes the required necessary low-level code to |
| 262 | * acknowledge a watchdog timer interrupt. There can be multiple watchdog |
| 263 | * timers associated with a rproc (like IPUs which have 2 watchdog timers, |
| 264 | * one per Cortex M3/M4 core), so a lookup has to be performed to identify |
| 265 | * the timer to acknowledge its interrupt. |
| 266 | * |
| 267 | * The function also invokes rproc_report_crash to report the watchdog event |
| 268 | * to the remoteproc driver core, to trigger a recovery. |
| 269 | * |
| 270 | * Return: IRQ_HANDLED on success, otherwise IRQ_NONE |
| 271 | */ |
| 272 | static irqreturn_t omap_rproc_watchdog_isr(int irq, void *data) |
| 273 | { |
| 274 | struct rproc *rproc = data; |
| 275 | struct omap_rproc *oproc = rproc->priv; |
| 276 | struct device *dev = rproc->dev.parent; |
| 277 | struct omap_rproc_timer *timers = oproc->timers; |
| 278 | struct omap_rproc_timer *wd_timer = NULL; |
| 279 | int num_timers = oproc->num_timers + oproc->num_wd_timers; |
| 280 | int i; |
| 281 | |
| 282 | for (i = oproc->num_timers; i < num_timers; i++) { |
| 283 | if (timers[i].irq > 0 && irq == timers[i].irq) { |
| 284 | wd_timer = &timers[i]; |
| 285 | break; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | if (!wd_timer) { |
| 290 | dev_err(dev, "invalid timer\n"); |
| 291 | return IRQ_NONE; |
| 292 | } |
| 293 | |
| 294 | omap_rproc_ack_timer_irq(wd_timer); |
| 295 | |
| 296 | rproc_report_crash(rproc, RPROC_WATCHDOG); |
| 297 | |
| 298 | return IRQ_HANDLED; |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * omap_rproc_enable_timers() - enable the timers for a remoteproc |
| 303 | * @rproc: handle of a remote processor |
| 304 | * @configure: boolean flag used to acquire and configure the timer handle |
| 305 | * |
| 306 | * This function is used primarily to enable the timers associated with |
| 307 | * a remoteproc. The configure flag is provided to allow the driver |
| 308 | * to either acquire and start a timer (during device initialization) or |
| 309 | * to just start a timer (during a resume operation). |
| 310 | * |
| 311 | * Return: 0 on success, otherwise an appropriate failure |
| 312 | */ |
| 313 | static int omap_rproc_enable_timers(struct rproc *rproc, bool configure) |
| 314 | { |
| 315 | int i; |
| 316 | int ret = 0; |
| 317 | struct platform_device *tpdev; |
| 318 | struct dmtimer_platform_data *tpdata; |
| 319 | const struct omap_dm_timer_ops *timer_ops; |
| 320 | struct omap_rproc *oproc = rproc->priv; |
| 321 | struct omap_rproc_timer *timers = oproc->timers; |
| 322 | struct device *dev = rproc->dev.parent; |
| 323 | struct device_node *np = NULL; |
| 324 | int num_timers = oproc->num_timers + oproc->num_wd_timers; |
| 325 | |
| 326 | if (!num_timers) |
| 327 | return 0; |
| 328 | |
| 329 | if (!configure) |
| 330 | goto start_timers; |
| 331 | |
| 332 | for (i = 0; i < num_timers; i++) { |
| 333 | if (i < oproc->num_timers) |
| 334 | np = of_parse_phandle(dev->of_node, "ti,timers", i); |
| 335 | else |
| 336 | np = of_parse_phandle(dev->of_node, |
| 337 | "ti,watchdog-timers", |
| 338 | (i - oproc->num_timers)); |
| 339 | if (!np) { |
| 340 | ret = -ENXIO; |
| 341 | dev_err(dev, "device node lookup for timer at index %d failed: %d\n", |
| 342 | i < oproc->num_timers ? i : |
| 343 | i - oproc->num_timers, ret); |
| 344 | goto free_timers; |
| 345 | } |
| 346 | |
| 347 | tpdev = of_find_device_by_node(np); |
| 348 | if (!tpdev) { |
| 349 | ret = -ENODEV; |
| 350 | dev_err(dev, "could not get timer platform device\n"); |
| 351 | goto put_node; |
| 352 | } |
| 353 | |
| 354 | tpdata = dev_get_platdata(&tpdev->dev); |
| 355 | put_device(&tpdev->dev); |
| 356 | if (!tpdata) { |
| 357 | ret = -EINVAL; |
| 358 | dev_err(dev, "dmtimer pdata structure NULL\n"); |
| 359 | goto put_node; |
| 360 | } |
| 361 | |
| 362 | timer_ops = tpdata->timer_ops; |
| 363 | if (!timer_ops || !timer_ops->request_by_node || |
| 364 | !timer_ops->set_source || !timer_ops->set_load || |
| 365 | !timer_ops->free || !timer_ops->start || |
| 366 | !timer_ops->stop || !timer_ops->get_irq || |
| 367 | !timer_ops->write_status) { |
| 368 | ret = -EINVAL; |
| 369 | dev_err(dev, "device does not have required timer ops\n"); |
| 370 | goto put_node; |
| 371 | } |
| 372 | |
| 373 | timers[i].irq = -1; |
| 374 | timers[i].timer_ops = timer_ops; |
| 375 | ret = omap_rproc_request_timer(dev, np, &timers[i]); |
| 376 | if (ret) { |
| 377 | dev_err(dev, "request for timer %p failed: %d\n", np, |
| 378 | ret); |
| 379 | goto put_node; |
| 380 | } |
| 381 | of_node_put(np); |
| 382 | |
| 383 | if (i >= oproc->num_timers) { |
| 384 | timers[i].irq = omap_rproc_get_timer_irq(&timers[i]); |
| 385 | if (timers[i].irq < 0) { |
| 386 | dev_err(dev, "get_irq for timer %p failed: %d\n", |
| 387 | np, timers[i].irq); |
| 388 | ret = -EBUSY; |
| 389 | goto free_timers; |
| 390 | } |
| 391 | |
| 392 | ret = request_irq(timers[i].irq, |
| 393 | omap_rproc_watchdog_isr, IRQF_SHARED, |
| 394 | "rproc-wdt", rproc); |
| 395 | if (ret) { |
| 396 | dev_err(dev, "error requesting irq for timer %p\n", |
| 397 | np); |
| 398 | omap_rproc_release_timer(&timers[i]); |
| 399 | timers[i].odt = NULL; |
| 400 | timers[i].timer_ops = NULL; |
| 401 | timers[i].irq = -1; |
| 402 | goto free_timers; |
| 403 | } |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | start_timers: |
| 408 | for (i = 0; i < num_timers; i++) { |
| 409 | ret = omap_rproc_start_timer(&timers[i]); |
| 410 | if (ret) { |
| 411 | dev_err(dev, "start timer %p failed failed: %d\n", np, |
| 412 | ret); |
| 413 | break; |
| 414 | } |
| 415 | } |
| 416 | if (ret) { |
| 417 | while (i >= 0) { |
| 418 | omap_rproc_stop_timer(&timers[i]); |
| 419 | i--; |
| 420 | } |
| 421 | goto put_node; |
| 422 | } |
| 423 | return 0; |
| 424 | |
| 425 | put_node: |
| 426 | if (configure) |
| 427 | of_node_put(np); |
| 428 | free_timers: |
| 429 | while (i--) { |
| 430 | if (i >= oproc->num_timers) |
| 431 | free_irq(timers[i].irq, rproc); |
| 432 | omap_rproc_release_timer(&timers[i]); |
| 433 | timers[i].odt = NULL; |
| 434 | timers[i].timer_ops = NULL; |
| 435 | timers[i].irq = -1; |
| 436 | } |
| 437 | |
| 438 | return ret; |
| 439 | } |
| 440 | |
| 441 | /** |
| 442 | * omap_rproc_disable_timers() - disable the timers for a remoteproc |
| 443 | * @rproc: handle of a remote processor |
| 444 | * @configure: boolean flag used to release the timer handle |
| 445 | * |
| 446 | * This function is used primarily to disable the timers associated with |
| 447 | * a remoteproc. The configure flag is provided to allow the driver |
| 448 | * to either stop and release a timer (during device shutdown) or to just |
| 449 | * stop a timer (during a suspend operation). |
| 450 | * |
| 451 | * Return: 0 on success or no timers |
| 452 | */ |
| 453 | static int omap_rproc_disable_timers(struct rproc *rproc, bool configure) |
| 454 | { |
| 455 | int i; |
| 456 | struct omap_rproc *oproc = rproc->priv; |
| 457 | struct omap_rproc_timer *timers = oproc->timers; |
| 458 | int num_timers = oproc->num_timers + oproc->num_wd_timers; |
| 459 | |
| 460 | if (!num_timers) |
| 461 | return 0; |
| 462 | |
| 463 | for (i = 0; i < num_timers; i++) { |
| 464 | omap_rproc_stop_timer(&timers[i]); |
| 465 | if (configure) { |
| 466 | if (i >= oproc->num_timers) |
| 467 | free_irq(timers[i].irq, rproc); |
| 468 | omap_rproc_release_timer(&timers[i]); |
| 469 | timers[i].odt = NULL; |
| 470 | timers[i].timer_ops = NULL; |
| 471 | timers[i].irq = -1; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | /** |
| 479 | * omap_rproc_mbox_callback() - inbound mailbox message handler |
| 480 | * @client: mailbox client pointer used for requesting the mailbox channel |
| 481 | * @data: mailbox payload |
| 482 | * |
| 483 | * This handler is invoked by omap's mailbox driver whenever a mailbox |
| 484 | * message is received. Usually, the mailbox payload simply contains |
| 485 | * the index of the virtqueue that is kicked by the remote processor, |
| 486 | * and we let remoteproc core handle it. |
| 487 | * |
| 488 | * In addition to virtqueue indices, we also have some out-of-band values |
| 489 | * that indicates different events. Those values are deliberately very |
| 490 | * big so they don't coincide with virtqueue indices. |
| 491 | */ |
| 492 | static void omap_rproc_mbox_callback(struct mbox_client *client, void *data) |
| 493 | { |
| 494 | struct omap_rproc *oproc = container_of(client, struct omap_rproc, |
| 495 | client); |
| 496 | struct device *dev = oproc->rproc->dev.parent; |
| 497 | const char *name = oproc->rproc->name; |
| 498 | u32 msg = (u32)data; |
| 499 | |
| 500 | dev_dbg(dev, "mbox msg: 0x%x\n", msg); |
| 501 | |
| 502 | switch (msg) { |
| 503 | case RP_MBOX_CRASH: |
| 504 | /* |
| 505 | * remoteproc detected an exception, notify the rproc core. |
| 506 | * The remoteproc core will handle the recovery. |
| 507 | */ |
| 508 | dev_err(dev, "omap rproc %s crashed\n", name); |
| 509 | rproc_report_crash(oproc->rproc, RPROC_FATAL_ERROR); |
| 510 | break; |
| 511 | case RP_MBOX_ECHO_REPLY: |
| 512 | dev_info(dev, "received echo reply from %s\n", name); |
| 513 | break; |
| 514 | case RP_MBOX_SUSPEND_ACK: |
| 515 | case RP_MBOX_SUSPEND_CANCEL: |
| 516 | oproc->suspend_acked = msg == RP_MBOX_SUSPEND_ACK; |
| 517 | complete(&oproc->pm_comp); |
| 518 | break; |
| 519 | default: |
| 520 | if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG) |
| 521 | return; |
| 522 | if (msg > oproc->rproc->max_notifyid) { |
| 523 | dev_dbg(dev, "dropping unknown message 0x%x", msg); |
| 524 | return; |
| 525 | } |
| 526 | /* msg contains the index of the triggered vring */ |
| 527 | if (rproc_vq_interrupt(oproc->rproc, msg) == IRQ_NONE) |
| 528 | dev_dbg(dev, "no message was found in vqid %d\n", msg); |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | /* kick a virtqueue */ |
| 533 | static void omap_rproc_kick(struct rproc *rproc, int vqid) |
| 534 | { |
| 535 | struct omap_rproc *oproc = rproc->priv; |
| 536 | struct device *dev = rproc->dev.parent; |
| 537 | int ret; |
| 538 | |
| 539 | /* wake up the rproc before kicking it */ |
| 540 | ret = pm_runtime_get_sync(dev); |
| 541 | if (WARN_ON(ret < 0)) { |
| 542 | dev_err(dev, "pm_runtime_get_sync() failed during kick, ret = %d\n", |
| 543 | ret); |
| 544 | pm_runtime_put_noidle(dev); |
| 545 | return; |
| 546 | } |
| 547 | |
| 548 | /* send the index of the triggered virtqueue in the mailbox payload */ |
| 549 | ret = mbox_send_message(oproc->mbox, (void *)vqid); |
| 550 | if (ret < 0) |
| 551 | dev_err(dev, "failed to send mailbox message, status = %d\n", |
| 552 | ret); |
| 553 | |
| 554 | pm_runtime_mark_last_busy(dev); |
| 555 | pm_runtime_put_autosuspend(dev); |
| 556 | } |
| 557 | |
| 558 | /** |
| 559 | * omap_rproc_write_dsp_boot_addr() - set boot address for DSP remote processor |
| 560 | * @rproc: handle of a remote processor |
| 561 | * |
| 562 | * Set boot address for a supported DSP remote processor. |
| 563 | * |
| 564 | * Return: 0 on success, or -EINVAL if boot address is not aligned properly |
| 565 | */ |
| 566 | static int omap_rproc_write_dsp_boot_addr(struct rproc *rproc) |
| 567 | { |
| 568 | struct device *dev = rproc->dev.parent; |
| 569 | struct omap_rproc *oproc = rproc->priv; |
| 570 | struct omap_rproc_boot_data *bdata = oproc->boot_data; |
| 571 | u32 offset = bdata->boot_reg; |
| 572 | u32 value; |
| 573 | u32 mask; |
| 574 | |
| 575 | if (rproc->bootaddr & (SZ_1K - 1)) { |
| 576 | dev_err(dev, "invalid boot address 0x%llx, must be aligned on a 1KB boundary\n", |
| 577 | rproc->bootaddr); |
| 578 | return -EINVAL; |
| 579 | } |
| 580 | |
| 581 | value = rproc->bootaddr >> bdata->boot_reg_shift; |
| 582 | mask = ~(SZ_1K - 1) >> bdata->boot_reg_shift; |
| 583 | |
| 584 | return regmap_update_bits(bdata->syscon, offset, mask, value); |
| 585 | } |
| 586 | |
| 587 | /* |
| 588 | * Power up the remote processor. |
| 589 | * |
| 590 | * This function will be invoked only after the firmware for this rproc |
| 591 | * was loaded, parsed successfully, and all of its resource requirements |
| 592 | * were met. |
| 593 | */ |
| 594 | static int omap_rproc_start(struct rproc *rproc) |
| 595 | { |
| 596 | struct omap_rproc *oproc = rproc->priv; |
| 597 | struct device *dev = rproc->dev.parent; |
| 598 | int ret; |
| 599 | struct mbox_client *client = &oproc->client; |
| 600 | |
| 601 | if (oproc->boot_data) { |
| 602 | ret = omap_rproc_write_dsp_boot_addr(rproc); |
| 603 | if (ret) |
| 604 | return ret; |
| 605 | } |
| 606 | |
| 607 | client->dev = dev; |
| 608 | client->tx_done = NULL; |
| 609 | client->rx_callback = omap_rproc_mbox_callback; |
| 610 | client->tx_block = false; |
| 611 | client->knows_txdone = false; |
| 612 | |
| 613 | oproc->mbox = mbox_request_channel(client, 0); |
| 614 | if (IS_ERR(oproc->mbox)) { |
| 615 | ret = -EBUSY; |
| 616 | dev_err(dev, "mbox_request_channel failed: %ld\n", |
| 617 | PTR_ERR(oproc->mbox)); |
| 618 | return ret; |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * Ping the remote processor. this is only for sanity-sake; |
| 623 | * there is no functional effect whatsoever. |
| 624 | * |
| 625 | * Note that the reply will _not_ arrive immediately: this message |
| 626 | * will wait in the mailbox fifo until the remote processor is booted. |
| 627 | */ |
| 628 | ret = mbox_send_message(oproc->mbox, (void *)RP_MBOX_ECHO_REQUEST); |
| 629 | if (ret < 0) { |
| 630 | dev_err(dev, "mbox_send_message failed: %d\n", ret); |
| 631 | goto put_mbox; |
| 632 | } |
| 633 | |
| 634 | ret = omap_rproc_enable_timers(rproc, true); |
| 635 | if (ret) { |
| 636 | dev_err(dev, "omap_rproc_enable_timers failed: %d\n", ret); |
| 637 | goto put_mbox; |
| 638 | } |
| 639 | |
| 640 | ret = reset_control_deassert(oproc->reset); |
| 641 | if (ret) { |
| 642 | dev_err(dev, "reset control deassert failed: %d\n", ret); |
| 643 | goto disable_timers; |
| 644 | } |
| 645 | |
| 646 | /* |
| 647 | * remote processor is up, so update the runtime pm status and |
| 648 | * enable the auto-suspend. The device usage count is incremented |
| 649 | * manually for balancing it for auto-suspend |
| 650 | */ |
| 651 | pm_runtime_set_active(dev); |
| 652 | pm_runtime_use_autosuspend(dev); |
| 653 | pm_runtime_get_noresume(dev); |
| 654 | pm_runtime_enable(dev); |
| 655 | pm_runtime_mark_last_busy(dev); |
| 656 | pm_runtime_put_autosuspend(dev); |
| 657 | |
| 658 | return 0; |
| 659 | |
| 660 | disable_timers: |
| 661 | omap_rproc_disable_timers(rproc, true); |
| 662 | put_mbox: |
| 663 | mbox_free_channel(oproc->mbox); |
| 664 | return ret; |
| 665 | } |
| 666 | |
| 667 | /* power off the remote processor */ |
| 668 | static int omap_rproc_stop(struct rproc *rproc) |
| 669 | { |
| 670 | struct device *dev = rproc->dev.parent; |
| 671 | struct omap_rproc *oproc = rproc->priv; |
| 672 | int ret; |
| 673 | |
| 674 | /* |
| 675 | * cancel any possible scheduled runtime suspend by incrementing |
| 676 | * the device usage count, and resuming the device. The remoteproc |
| 677 | * also needs to be woken up if suspended, to avoid the remoteproc |
| 678 | * OS to continue to remember any context that it has saved, and |
| 679 | * avoid potential issues in misindentifying a subsequent device |
| 680 | * reboot as a power restore boot |
| 681 | */ |
| 682 | ret = pm_runtime_get_sync(dev); |
| 683 | if (ret < 0) { |
| 684 | pm_runtime_put_noidle(dev); |
| 685 | return ret; |
| 686 | } |
| 687 | |
| 688 | ret = reset_control_assert(oproc->reset); |
| 689 | if (ret) |
| 690 | goto out; |
| 691 | |
| 692 | ret = omap_rproc_disable_timers(rproc, true); |
| 693 | if (ret) |
| 694 | goto enable_device; |
| 695 | |
| 696 | mbox_free_channel(oproc->mbox); |
| 697 | |
| 698 | /* |
| 699 | * update the runtime pm states and status now that the remoteproc |
| 700 | * has stopped |
| 701 | */ |
| 702 | pm_runtime_disable(dev); |
| 703 | pm_runtime_dont_use_autosuspend(dev); |
| 704 | pm_runtime_put_noidle(dev); |
| 705 | pm_runtime_set_suspended(dev); |
| 706 | |
| 707 | return 0; |
| 708 | |
| 709 | enable_device: |
| 710 | reset_control_deassert(oproc->reset); |
| 711 | out: |
| 712 | /* schedule the next auto-suspend */ |
| 713 | pm_runtime_mark_last_busy(dev); |
| 714 | pm_runtime_put_autosuspend(dev); |
| 715 | return ret; |
| 716 | } |
| 717 | |
| 718 | /** |
| 719 | * omap_rproc_da_to_va() - internal memory translation helper |
| 720 | * @rproc: remote processor to apply the address translation for |
| 721 | * @da: device address to translate |
| 722 | * @len: length of the memory buffer |
| 723 | * |
| 724 | * Custom function implementing the rproc .da_to_va ops to provide address |
| 725 | * translation (device address to kernel virtual address) for internal RAMs |
| 726 | * present in a DSP or IPU device). The translated addresses can be used |
| 727 | * either by the remoteproc core for loading, or by any rpmsg bus drivers. |
| 728 | * |
| 729 | * Return: translated virtual address in kernel memory space on success, |
| 730 | * or NULL on failure. |
| 731 | */ |
| 732 | static void *omap_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem) |
| 733 | { |
| 734 | struct omap_rproc *oproc = rproc->priv; |
| 735 | int i; |
| 736 | u32 offset; |
| 737 | |
| 738 | if (len <= 0) |
| 739 | return NULL; |
| 740 | |
| 741 | if (!oproc->num_mems) |
| 742 | return NULL; |
| 743 | |
| 744 | for (i = 0; i < oproc->num_mems; i++) { |
| 745 | if (da >= oproc->mem[i].dev_addr && da + len <= |
| 746 | oproc->mem[i].dev_addr + oproc->mem[i].size) { |
| 747 | offset = da - oproc->mem[i].dev_addr; |
| 748 | /* __force to make sparse happy with type conversion */ |
| 749 | return (__force void *)(oproc->mem[i].cpu_addr + |
| 750 | offset); |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | return NULL; |
| 755 | } |
| 756 | |
| 757 | static const struct rproc_ops omap_rproc_ops = { |
| 758 | .start = omap_rproc_start, |
| 759 | .stop = omap_rproc_stop, |
| 760 | .kick = omap_rproc_kick, |
| 761 | .da_to_va = omap_rproc_da_to_va, |
| 762 | }; |
| 763 | |
| 764 | #ifdef CONFIG_PM |
| 765 | static bool _is_rproc_in_standby(struct omap_rproc *oproc) |
| 766 | { |
| 767 | return ti_clk_is_in_standby(oproc->fck); |
| 768 | } |
| 769 | |
| 770 | /* 1 sec is long enough time to let the remoteproc side suspend the device */ |
| 771 | #define DEF_SUSPEND_TIMEOUT 1000 |
| 772 | static int _omap_rproc_suspend(struct rproc *rproc, bool auto_suspend) |
| 773 | { |
| 774 | struct device *dev = rproc->dev.parent; |
| 775 | struct omap_rproc *oproc = rproc->priv; |
| 776 | unsigned long to = msecs_to_jiffies(DEF_SUSPEND_TIMEOUT); |
| 777 | unsigned long ta = jiffies + to; |
| 778 | u32 suspend_msg = auto_suspend ? |
| 779 | RP_MBOX_SUSPEND_AUTO : RP_MBOX_SUSPEND_SYSTEM; |
| 780 | int ret; |
| 781 | |
| 782 | reinit_completion(&oproc->pm_comp); |
| 783 | oproc->suspend_acked = false; |
| 784 | ret = mbox_send_message(oproc->mbox, (void *)suspend_msg); |
| 785 | if (ret < 0) { |
| 786 | dev_err(dev, "PM mbox_send_message failed: %d\n", ret); |
| 787 | return ret; |
| 788 | } |
| 789 | |
| 790 | ret = wait_for_completion_timeout(&oproc->pm_comp, to); |
| 791 | if (!oproc->suspend_acked) |
| 792 | return -EBUSY; |
| 793 | |
| 794 | /* |
| 795 | * The remoteproc side is returning the ACK message before saving the |
| 796 | * context, because the context saving is performed within a SYS/BIOS |
| 797 | * function, and it cannot have any inter-dependencies against the IPC |
| 798 | * layer. Also, as the SYS/BIOS needs to preserve properly the processor |
| 799 | * register set, sending this ACK or signalling the completion of the |
| 800 | * context save through a shared memory variable can never be the |
| 801 | * absolute last thing to be executed on the remoteproc side, and the |
| 802 | * MPU cannot use the ACK message as a sync point to put the remoteproc |
| 803 | * into reset. The only way to ensure that the remote processor has |
| 804 | * completed saving the context is to check that the module has reached |
| 805 | * STANDBY state (after saving the context, the SYS/BIOS executes the |
| 806 | * appropriate target-specific WFI instruction causing the module to |
| 807 | * enter STANDBY). |
| 808 | */ |
| 809 | while (!_is_rproc_in_standby(oproc)) { |
| 810 | if (time_after(jiffies, ta)) |
| 811 | return -ETIME; |
| 812 | schedule(); |
| 813 | } |
| 814 | |
| 815 | ret = reset_control_assert(oproc->reset); |
| 816 | if (ret) { |
| 817 | dev_err(dev, "reset assert during suspend failed %d\n", ret); |
| 818 | return ret; |
| 819 | } |
| 820 | |
| 821 | ret = omap_rproc_disable_timers(rproc, false); |
| 822 | if (ret) { |
| 823 | dev_err(dev, "disabling timers during suspend failed %d\n", |
| 824 | ret); |
| 825 | goto enable_device; |
| 826 | } |
| 827 | |
| 828 | /* |
| 829 | * IOMMUs would have to be disabled specifically for runtime suspend. |
| 830 | * They are handled automatically through System PM callbacks for |
| 831 | * regular system suspend |
| 832 | */ |
| 833 | if (auto_suspend) { |
| 834 | ret = omap_iommu_domain_deactivate(rproc->domain); |
| 835 | if (ret) { |
| 836 | dev_err(dev, "iommu domain deactivate failed %d\n", |
| 837 | ret); |
| 838 | goto enable_timers; |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | return 0; |
| 843 | |
| 844 | enable_timers: |
| 845 | /* ignore errors on re-enabling code */ |
| 846 | omap_rproc_enable_timers(rproc, false); |
| 847 | enable_device: |
| 848 | reset_control_deassert(oproc->reset); |
| 849 | return ret; |
| 850 | } |
| 851 | |
| 852 | static int _omap_rproc_resume(struct rproc *rproc, bool auto_suspend) |
| 853 | { |
| 854 | struct device *dev = rproc->dev.parent; |
| 855 | struct omap_rproc *oproc = rproc->priv; |
| 856 | int ret; |
| 857 | |
| 858 | /* |
| 859 | * IOMMUs would have to be enabled specifically for runtime resume. |
| 860 | * They would have been already enabled automatically through System |
| 861 | * PM callbacks for regular system resume |
| 862 | */ |
| 863 | if (auto_suspend) { |
| 864 | ret = omap_iommu_domain_activate(rproc->domain); |
| 865 | if (ret) { |
| 866 | dev_err(dev, "omap_iommu activate failed %d\n", ret); |
| 867 | goto out; |
| 868 | } |
| 869 | } |
| 870 | |
| 871 | /* boot address could be lost after suspend, so restore it */ |
| 872 | if (oproc->boot_data) { |
| 873 | ret = omap_rproc_write_dsp_boot_addr(rproc); |
| 874 | if (ret) { |
| 875 | dev_err(dev, "boot address restore failed %d\n", ret); |
| 876 | goto suspend_iommu; |
| 877 | } |
| 878 | } |
| 879 | |
| 880 | ret = omap_rproc_enable_timers(rproc, false); |
| 881 | if (ret) { |
| 882 | dev_err(dev, "enabling timers during resume failed %d\n", ret); |
| 883 | goto suspend_iommu; |
| 884 | } |
| 885 | |
| 886 | ret = reset_control_deassert(oproc->reset); |
| 887 | if (ret) { |
| 888 | dev_err(dev, "reset deassert during resume failed %d\n", ret); |
| 889 | goto disable_timers; |
| 890 | } |
| 891 | |
| 892 | return 0; |
| 893 | |
| 894 | disable_timers: |
| 895 | omap_rproc_disable_timers(rproc, false); |
| 896 | suspend_iommu: |
| 897 | if (auto_suspend) |
| 898 | omap_iommu_domain_deactivate(rproc->domain); |
| 899 | out: |
| 900 | return ret; |
| 901 | } |
| 902 | |
| 903 | static int __maybe_unused omap_rproc_suspend(struct device *dev) |
| 904 | { |
| 905 | struct rproc *rproc = dev_get_drvdata(dev); |
| 906 | struct omap_rproc *oproc = rproc->priv; |
| 907 | int ret = 0; |
| 908 | |
| 909 | mutex_lock(&rproc->lock); |
| 910 | if (rproc->state == RPROC_OFFLINE) |
| 911 | goto out; |
| 912 | |
| 913 | if (rproc->state == RPROC_SUSPENDED) |
| 914 | goto out; |
| 915 | |
| 916 | if (rproc->state != RPROC_RUNNING) { |
| 917 | ret = -EBUSY; |
| 918 | goto out; |
| 919 | } |
| 920 | |
| 921 | ret = _omap_rproc_suspend(rproc, false); |
| 922 | if (ret) { |
| 923 | dev_err(dev, "suspend failed %d\n", ret); |
| 924 | goto out; |
| 925 | } |
| 926 | |
| 927 | /* |
| 928 | * remoteproc is running at the time of system suspend, so remember |
| 929 | * it so as to wake it up during system resume |
| 930 | */ |
| 931 | oproc->need_resume = true; |
| 932 | rproc->state = RPROC_SUSPENDED; |
| 933 | |
| 934 | out: |
| 935 | mutex_unlock(&rproc->lock); |
| 936 | return ret; |
| 937 | } |
| 938 | |
| 939 | static int __maybe_unused omap_rproc_resume(struct device *dev) |
| 940 | { |
| 941 | struct rproc *rproc = dev_get_drvdata(dev); |
| 942 | struct omap_rproc *oproc = rproc->priv; |
| 943 | int ret = 0; |
| 944 | |
| 945 | mutex_lock(&rproc->lock); |
| 946 | if (rproc->state == RPROC_OFFLINE) |
| 947 | goto out; |
| 948 | |
| 949 | if (rproc->state != RPROC_SUSPENDED) { |
| 950 | ret = -EBUSY; |
| 951 | goto out; |
| 952 | } |
| 953 | |
| 954 | /* |
| 955 | * remoteproc was auto-suspended at the time of system suspend, |
| 956 | * so no need to wake-up the processor (leave it in suspended |
| 957 | * state, will be woken up during a subsequent runtime_resume) |
| 958 | */ |
| 959 | if (!oproc->need_resume) |
| 960 | goto out; |
| 961 | |
| 962 | ret = _omap_rproc_resume(rproc, false); |
| 963 | if (ret) { |
| 964 | dev_err(dev, "resume failed %d\n", ret); |
| 965 | goto out; |
| 966 | } |
| 967 | |
| 968 | oproc->need_resume = false; |
| 969 | rproc->state = RPROC_RUNNING; |
| 970 | |
| 971 | pm_runtime_mark_last_busy(dev); |
| 972 | out: |
| 973 | mutex_unlock(&rproc->lock); |
| 974 | return ret; |
| 975 | } |
| 976 | |
| 977 | static int omap_rproc_runtime_suspend(struct device *dev) |
| 978 | { |
| 979 | struct rproc *rproc = dev_get_drvdata(dev); |
| 980 | struct omap_rproc *oproc = rproc->priv; |
| 981 | int ret; |
| 982 | |
| 983 | mutex_lock(&rproc->lock); |
| 984 | if (rproc->state == RPROC_CRASHED) { |
| 985 | dev_dbg(dev, "rproc cannot be runtime suspended when crashed!\n"); |
| 986 | ret = -EBUSY; |
| 987 | goto out; |
| 988 | } |
| 989 | |
| 990 | if (WARN_ON(rproc->state != RPROC_RUNNING)) { |
| 991 | dev_err(dev, "rproc cannot be runtime suspended when not running!\n"); |
| 992 | ret = -EBUSY; |
| 993 | goto out; |
| 994 | } |
| 995 | |
| 996 | /* |
| 997 | * do not even attempt suspend if the remote processor is not |
| 998 | * idled for runtime auto-suspend |
| 999 | */ |
| 1000 | if (!_is_rproc_in_standby(oproc)) { |
| 1001 | ret = -EBUSY; |
| 1002 | goto abort; |
| 1003 | } |
| 1004 | |
| 1005 | ret = _omap_rproc_suspend(rproc, true); |
| 1006 | if (ret) |
| 1007 | goto abort; |
| 1008 | |
| 1009 | rproc->state = RPROC_SUSPENDED; |
| 1010 | mutex_unlock(&rproc->lock); |
| 1011 | return 0; |
| 1012 | |
| 1013 | abort: |
| 1014 | pm_runtime_mark_last_busy(dev); |
| 1015 | out: |
| 1016 | mutex_unlock(&rproc->lock); |
| 1017 | return ret; |
| 1018 | } |
| 1019 | |
| 1020 | static int omap_rproc_runtime_resume(struct device *dev) |
| 1021 | { |
| 1022 | struct rproc *rproc = dev_get_drvdata(dev); |
| 1023 | int ret; |
| 1024 | |
| 1025 | mutex_lock(&rproc->lock); |
| 1026 | if (WARN_ON(rproc->state != RPROC_SUSPENDED)) { |
| 1027 | dev_err(dev, "rproc cannot be runtime resumed if not suspended! state=%d\n", |
| 1028 | rproc->state); |
| 1029 | ret = -EBUSY; |
| 1030 | goto out; |
| 1031 | } |
| 1032 | |
| 1033 | ret = _omap_rproc_resume(rproc, true); |
| 1034 | if (ret) { |
| 1035 | dev_err(dev, "runtime resume failed %d\n", ret); |
| 1036 | goto out; |
| 1037 | } |
| 1038 | |
| 1039 | rproc->state = RPROC_RUNNING; |
| 1040 | out: |
| 1041 | mutex_unlock(&rproc->lock); |
| 1042 | return ret; |
| 1043 | } |
| 1044 | #endif /* CONFIG_PM */ |
| 1045 | |
| 1046 | static const struct omap_rproc_mem_data ipu_mems[] = { |
| 1047 | { .name = "l2ram", .dev_addr = 0x20000000 }, |
| 1048 | { }, |
| 1049 | }; |
| 1050 | |
| 1051 | static const struct omap_rproc_mem_data dra7_dsp_mems[] = { |
| 1052 | { .name = "l2ram", .dev_addr = 0x800000 }, |
| 1053 | { .name = "l1pram", .dev_addr = 0xe00000 }, |
| 1054 | { .name = "l1dram", .dev_addr = 0xf00000 }, |
| 1055 | { }, |
| 1056 | }; |
| 1057 | |
| 1058 | static const struct omap_rproc_dev_data omap4_dsp_dev_data = { |
| 1059 | .device_name = "dsp", |
| 1060 | }; |
| 1061 | |
| 1062 | static const struct omap_rproc_dev_data omap4_ipu_dev_data = { |
| 1063 | .device_name = "ipu", |
| 1064 | .mems = ipu_mems, |
| 1065 | }; |
| 1066 | |
| 1067 | static const struct omap_rproc_dev_data omap5_dsp_dev_data = { |
| 1068 | .device_name = "dsp", |
| 1069 | }; |
| 1070 | |
| 1071 | static const struct omap_rproc_dev_data omap5_ipu_dev_data = { |
| 1072 | .device_name = "ipu", |
| 1073 | .mems = ipu_mems, |
| 1074 | }; |
| 1075 | |
| 1076 | static const struct omap_rproc_dev_data dra7_dsp_dev_data = { |
| 1077 | .device_name = "dsp", |
| 1078 | .mems = dra7_dsp_mems, |
| 1079 | }; |
| 1080 | |
| 1081 | static const struct omap_rproc_dev_data dra7_ipu_dev_data = { |
| 1082 | .device_name = "ipu", |
| 1083 | .mems = ipu_mems, |
| 1084 | }; |
| 1085 | |
| 1086 | static const struct of_device_id omap_rproc_of_match[] = { |
| 1087 | { |
| 1088 | .compatible = "ti,omap4-dsp", |
| 1089 | .data = &omap4_dsp_dev_data, |
| 1090 | }, |
| 1091 | { |
| 1092 | .compatible = "ti,omap4-ipu", |
| 1093 | .data = &omap4_ipu_dev_data, |
| 1094 | }, |
| 1095 | { |
| 1096 | .compatible = "ti,omap5-dsp", |
| 1097 | .data = &omap5_dsp_dev_data, |
| 1098 | }, |
| 1099 | { |
| 1100 | .compatible = "ti,omap5-ipu", |
| 1101 | .data = &omap5_ipu_dev_data, |
| 1102 | }, |
| 1103 | { |
| 1104 | .compatible = "ti,dra7-dsp", |
| 1105 | .data = &dra7_dsp_dev_data, |
| 1106 | }, |
| 1107 | { |
| 1108 | .compatible = "ti,dra7-ipu", |
| 1109 | .data = &dra7_ipu_dev_data, |
| 1110 | }, |
| 1111 | { |
| 1112 | /* end */ |
| 1113 | }, |
| 1114 | }; |
| 1115 | MODULE_DEVICE_TABLE(of, omap_rproc_of_match); |
| 1116 | |
| 1117 | static const char *omap_rproc_get_firmware(struct platform_device *pdev) |
| 1118 | { |
| 1119 | const char *fw_name; |
| 1120 | int ret; |
| 1121 | |
| 1122 | ret = of_property_read_string(pdev->dev.of_node, "firmware-name", |
| 1123 | &fw_name); |
| 1124 | if (ret) |
| 1125 | return ERR_PTR(ret); |
| 1126 | |
| 1127 | return fw_name; |
| 1128 | } |
| 1129 | |
| 1130 | static int omap_rproc_get_boot_data(struct platform_device *pdev, |
| 1131 | struct rproc *rproc) |
| 1132 | { |
| 1133 | struct device_node *np = pdev->dev.of_node; |
| 1134 | struct omap_rproc *oproc = rproc->priv; |
| 1135 | const struct omap_rproc_dev_data *data; |
| 1136 | int ret; |
| 1137 | |
| 1138 | data = of_device_get_match_data(&pdev->dev); |
| 1139 | if (!data) |
| 1140 | return -ENODEV; |
| 1141 | |
| 1142 | if (!of_property_read_bool(np, "ti,bootreg")) |
| 1143 | return 0; |
| 1144 | |
| 1145 | oproc->boot_data = devm_kzalloc(&pdev->dev, sizeof(*oproc->boot_data), |
| 1146 | GFP_KERNEL); |
| 1147 | if (!oproc->boot_data) |
| 1148 | return -ENOMEM; |
| 1149 | |
| 1150 | oproc->boot_data->syscon = |
| 1151 | syscon_regmap_lookup_by_phandle(np, "ti,bootreg"); |
| 1152 | if (IS_ERR(oproc->boot_data->syscon)) { |
| 1153 | ret = PTR_ERR(oproc->boot_data->syscon); |
| 1154 | return ret; |
| 1155 | } |
| 1156 | |
| 1157 | if (of_property_read_u32_index(np, "ti,bootreg", 1, |
| 1158 | &oproc->boot_data->boot_reg)) { |
| 1159 | dev_err(&pdev->dev, "couldn't get the boot register\n"); |
| 1160 | return -EINVAL; |
| 1161 | } |
| 1162 | |
| 1163 | of_property_read_u32_index(np, "ti,bootreg", 2, |
| 1164 | &oproc->boot_data->boot_reg_shift); |
| 1165 | |
| 1166 | return 0; |
| 1167 | } |
| 1168 | |
| 1169 | static int omap_rproc_of_get_internal_memories(struct platform_device *pdev, |
| 1170 | struct rproc *rproc) |
| 1171 | { |
| 1172 | struct omap_rproc *oproc = rproc->priv; |
| 1173 | struct device *dev = &pdev->dev; |
| 1174 | const struct omap_rproc_dev_data *data; |
| 1175 | struct resource *res; |
| 1176 | int num_mems; |
| 1177 | int i; |
| 1178 | |
| 1179 | data = of_device_get_match_data(dev); |
| 1180 | if (!data) |
| 1181 | return -ENODEV; |
| 1182 | |
| 1183 | if (!data->mems) |
| 1184 | return 0; |
| 1185 | |
| 1186 | num_mems = of_property_count_elems_of_size(dev->of_node, "reg", |
| 1187 | sizeof(u32)) / 2; |
| 1188 | |
| 1189 | oproc->mem = devm_kcalloc(dev, num_mems, sizeof(*oproc->mem), |
| 1190 | GFP_KERNEL); |
| 1191 | if (!oproc->mem) |
| 1192 | return -ENOMEM; |
| 1193 | |
| 1194 | for (i = 0; data->mems[i].name; i++) { |
| 1195 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 1196 | data->mems[i].name); |
| 1197 | if (!res) { |
| 1198 | dev_err(dev, "no memory defined for %s\n", |
| 1199 | data->mems[i].name); |
| 1200 | return -ENOMEM; |
| 1201 | } |
| 1202 | oproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res); |
| 1203 | if (IS_ERR(oproc->mem[i].cpu_addr)) { |
| 1204 | dev_err(dev, "failed to parse and map %s memory\n", |
| 1205 | data->mems[i].name); |
| 1206 | return PTR_ERR(oproc->mem[i].cpu_addr); |
| 1207 | } |
| 1208 | oproc->mem[i].bus_addr = res->start; |
| 1209 | oproc->mem[i].dev_addr = data->mems[i].dev_addr; |
| 1210 | oproc->mem[i].size = resource_size(res); |
| 1211 | |
| 1212 | dev_dbg(dev, "memory %8s: bus addr %pa size 0x%x va %pK da 0x%x\n", |
| 1213 | data->mems[i].name, &oproc->mem[i].bus_addr, |
| 1214 | oproc->mem[i].size, oproc->mem[i].cpu_addr, |
| 1215 | oproc->mem[i].dev_addr); |
| 1216 | } |
| 1217 | oproc->num_mems = num_mems; |
| 1218 | |
| 1219 | return 0; |
| 1220 | } |
| 1221 | |
| 1222 | #ifdef CONFIG_OMAP_REMOTEPROC_WATCHDOG |
| 1223 | static int omap_rproc_count_wdog_timers(struct device *dev) |
| 1224 | { |
| 1225 | struct device_node *np = dev->of_node; |
| 1226 | int ret; |
| 1227 | |
| 1228 | ret = of_count_phandle_with_args(np, "ti,watchdog-timers", NULL); |
| 1229 | if (ret <= 0) { |
| 1230 | dev_dbg(dev, "device does not have watchdog timers, status = %d\n", |
| 1231 | ret); |
| 1232 | ret = 0; |
| 1233 | } |
| 1234 | |
| 1235 | return ret; |
| 1236 | } |
| 1237 | #else |
| 1238 | static int omap_rproc_count_wdog_timers(struct device *dev) |
| 1239 | { |
| 1240 | return 0; |
| 1241 | } |
| 1242 | #endif |
| 1243 | |
| 1244 | static int omap_rproc_of_get_timers(struct platform_device *pdev, |
| 1245 | struct rproc *rproc) |
| 1246 | { |
| 1247 | struct device_node *np = pdev->dev.of_node; |
| 1248 | struct omap_rproc *oproc = rproc->priv; |
| 1249 | struct device *dev = &pdev->dev; |
| 1250 | int num_timers; |
| 1251 | |
| 1252 | /* |
| 1253 | * Timer nodes are directly used in client nodes as phandles, so |
| 1254 | * retrieve the count using appropriate size |
| 1255 | */ |
| 1256 | oproc->num_timers = of_count_phandle_with_args(np, "ti,timers", NULL); |
| 1257 | if (oproc->num_timers <= 0) { |
| 1258 | dev_dbg(dev, "device does not have timers, status = %d\n", |
| 1259 | oproc->num_timers); |
| 1260 | oproc->num_timers = 0; |
| 1261 | } |
| 1262 | |
| 1263 | oproc->num_wd_timers = omap_rproc_count_wdog_timers(dev); |
| 1264 | |
| 1265 | num_timers = oproc->num_timers + oproc->num_wd_timers; |
| 1266 | if (num_timers) { |
| 1267 | oproc->timers = devm_kcalloc(dev, num_timers, |
| 1268 | sizeof(*oproc->timers), |
| 1269 | GFP_KERNEL); |
| 1270 | if (!oproc->timers) |
| 1271 | return -ENOMEM; |
| 1272 | |
| 1273 | dev_dbg(dev, "device has %d tick timers and %d watchdog timers\n", |
| 1274 | oproc->num_timers, oproc->num_wd_timers); |
| 1275 | } |
| 1276 | |
| 1277 | return 0; |
| 1278 | } |
| 1279 | |
| 1280 | static int omap_rproc_probe(struct platform_device *pdev) |
| 1281 | { |
| 1282 | struct device_node *np = pdev->dev.of_node; |
| 1283 | struct omap_rproc *oproc; |
| 1284 | struct rproc *rproc; |
| 1285 | const char *firmware; |
| 1286 | int ret; |
| 1287 | struct reset_control *reset; |
| 1288 | |
| 1289 | if (!np) { |
| 1290 | dev_err(&pdev->dev, "only DT-based devices are supported\n"); |
| 1291 | return -ENODEV; |
| 1292 | } |
| 1293 | |
| 1294 | reset = devm_reset_control_array_get_exclusive(&pdev->dev); |
| 1295 | if (IS_ERR(reset)) |
| 1296 | return PTR_ERR(reset); |
| 1297 | |
| 1298 | firmware = omap_rproc_get_firmware(pdev); |
| 1299 | if (IS_ERR(firmware)) |
| 1300 | return PTR_ERR(firmware); |
| 1301 | |
| 1302 | ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); |
| 1303 | if (ret) { |
| 1304 | dev_err(&pdev->dev, "dma_set_coherent_mask: %d\n", ret); |
| 1305 | return ret; |
| 1306 | } |
| 1307 | |
| 1308 | rproc = rproc_alloc(&pdev->dev, dev_name(&pdev->dev), &omap_rproc_ops, |
| 1309 | firmware, sizeof(*oproc)); |
| 1310 | if (!rproc) |
| 1311 | return -ENOMEM; |
| 1312 | |
| 1313 | oproc = rproc->priv; |
| 1314 | oproc->rproc = rproc; |
| 1315 | oproc->reset = reset; |
| 1316 | /* All existing OMAP IPU and DSP processors have an MMU */ |
| 1317 | rproc->has_iommu = true; |
| 1318 | |
| 1319 | ret = omap_rproc_of_get_internal_memories(pdev, rproc); |
| 1320 | if (ret) |
| 1321 | goto free_rproc; |
| 1322 | |
| 1323 | ret = omap_rproc_get_boot_data(pdev, rproc); |
| 1324 | if (ret) |
| 1325 | goto free_rproc; |
| 1326 | |
| 1327 | ret = omap_rproc_of_get_timers(pdev, rproc); |
| 1328 | if (ret) |
| 1329 | goto free_rproc; |
| 1330 | |
| 1331 | init_completion(&oproc->pm_comp); |
| 1332 | oproc->autosuspend_delay = DEFAULT_AUTOSUSPEND_DELAY; |
| 1333 | |
| 1334 | of_property_read_u32(pdev->dev.of_node, "ti,autosuspend-delay-ms", |
| 1335 | &oproc->autosuspend_delay); |
| 1336 | |
| 1337 | pm_runtime_set_autosuspend_delay(&pdev->dev, oproc->autosuspend_delay); |
| 1338 | |
| 1339 | oproc->fck = devm_clk_get(&pdev->dev, 0); |
| 1340 | if (IS_ERR(oproc->fck)) { |
| 1341 | ret = PTR_ERR(oproc->fck); |
| 1342 | goto free_rproc; |
| 1343 | } |
| 1344 | |
| 1345 | ret = of_reserved_mem_device_init(&pdev->dev); |
| 1346 | if (ret) { |
| 1347 | dev_warn(&pdev->dev, "device does not have specific CMA pool.\n"); |
| 1348 | dev_warn(&pdev->dev, "Typically this should be provided,\n"); |
| 1349 | dev_warn(&pdev->dev, "only omit if you know what you are doing.\n"); |
| 1350 | } |
| 1351 | |
| 1352 | platform_set_drvdata(pdev, rproc); |
| 1353 | |
| 1354 | ret = rproc_add(rproc); |
| 1355 | if (ret) |
| 1356 | goto release_mem; |
| 1357 | |
| 1358 | return 0; |
| 1359 | |
| 1360 | release_mem: |
| 1361 | of_reserved_mem_device_release(&pdev->dev); |
| 1362 | free_rproc: |
| 1363 | rproc_free(rproc); |
| 1364 | return ret; |
| 1365 | } |
| 1366 | |
| 1367 | static void omap_rproc_remove(struct platform_device *pdev) |
| 1368 | { |
| 1369 | struct rproc *rproc = platform_get_drvdata(pdev); |
| 1370 | |
| 1371 | rproc_del(rproc); |
| 1372 | rproc_free(rproc); |
| 1373 | of_reserved_mem_device_release(&pdev->dev); |
| 1374 | } |
| 1375 | |
| 1376 | static const struct dev_pm_ops omap_rproc_pm_ops = { |
| 1377 | SET_SYSTEM_SLEEP_PM_OPS(omap_rproc_suspend, omap_rproc_resume) |
| 1378 | SET_RUNTIME_PM_OPS(omap_rproc_runtime_suspend, |
| 1379 | omap_rproc_runtime_resume, NULL) |
| 1380 | }; |
| 1381 | |
| 1382 | static struct platform_driver omap_rproc_driver = { |
| 1383 | .probe = omap_rproc_probe, |
| 1384 | .remove_new = omap_rproc_remove, |
| 1385 | .driver = { |
| 1386 | .name = "omap-rproc", |
| 1387 | .pm = &omap_rproc_pm_ops, |
| 1388 | .of_match_table = omap_rproc_of_match, |
| 1389 | }, |
| 1390 | }; |
| 1391 | |
| 1392 | module_platform_driver(omap_rproc_driver); |
| 1393 | |
| 1394 | MODULE_LICENSE("GPL v2"); |
| 1395 | MODULE_DESCRIPTION("OMAP Remote Processor control driver"); |