1239922Sgonzo/*- 2239922Sgonzo * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org> 3239922Sgonzo * All rights reserved. 4239922Sgonzo * 5239922Sgonzo * Redistribution and use in source and binary forms, with or without 6239922Sgonzo * modification, are permitted provided that the following conditions 7239922Sgonzo * are met: 8239922Sgonzo * 1. Redistributions of source code must retain the above copyright 9239922Sgonzo * notice, this list of conditions and the following disclaimer. 10239922Sgonzo * 2. Redistributions in binary form must reproduce the above copyright 11239922Sgonzo * notice, this list of conditions and the following disclaimer in the 12239922Sgonzo * documentation and/or other materials provided with the distribution. 13239922Sgonzo * 14239922Sgonzo * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15239922Sgonzo * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16239922Sgonzo * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17239922Sgonzo * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18239922Sgonzo * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19239922Sgonzo * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20239922Sgonzo * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21239922Sgonzo * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22239922Sgonzo * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23239922Sgonzo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24239922Sgonzo * SUCH DAMAGE. 25239922Sgonzo */ 26239922Sgonzo 27239922Sgonzo#include <sys/cdefs.h> 28239922Sgonzo__FBSDID("$FreeBSD: stable/11/sys/arm/broadcom/bcm2835/bcm2835_mbox.c 307575 2016-10-18 19:15:43Z gonzo $"); 29239922Sgonzo 30239922Sgonzo#include <sys/param.h> 31239922Sgonzo#include <sys/systm.h> 32239922Sgonzo#include <sys/bus.h> 33239922Sgonzo#include <sys/kernel.h> 34276303Sloos#include <sys/lock.h> 35239922Sgonzo#include <sys/module.h> 36276303Sloos#include <sys/mutex.h> 37290666Sgonzo#include <sys/sx.h> 38239922Sgonzo#include <sys/rman.h> 39239922Sgonzo#include <machine/bus.h> 40239922Sgonzo 41239922Sgonzo#include <dev/ofw/ofw_bus.h> 42239922Sgonzo#include <dev/ofw/ofw_bus_subr.h> 43239922Sgonzo 44239922Sgonzo#include <arm/broadcom/bcm2835/bcm2835_mbox.h> 45280283Sandrew#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h> 46280283Sandrew#include <arm/broadcom/bcm2835/bcm2835_vcbus.h> 47239922Sgonzo 48253006Srpaulo#include "mbox_if.h" 49253006Srpaulo 50239922Sgonzo#define REG_READ 0x00 51239922Sgonzo#define REG_POL 0x10 52239922Sgonzo#define REG_SENDER 0x14 53239922Sgonzo#define REG_STATUS 0x18 54239922Sgonzo#define STATUS_FULL 0x80000000 55239922Sgonzo#define STATUS_EMPTY 0x40000000 56239922Sgonzo#define REG_CONFIG 0x1C 57239922Sgonzo#define CONFIG_DATA_IRQ 0x00000001 58239922Sgonzo#define REG_WRITE 0x20 /* This is Mailbox 1 address */ 59239922Sgonzo 60239922Sgonzo#define MBOX_MSG(chan, data) (((data) & ~0xf) | ((chan) & 0xf)) 61239922Sgonzo#define MBOX_CHAN(msg) ((msg) & 0xf) 62239922Sgonzo#define MBOX_DATA(msg) ((msg) & ~0xf) 63239922Sgonzo 64253006Srpaulo#define MBOX_LOCK(sc) do { \ 65253006Srpaulo mtx_lock(&(sc)->lock); \ 66239922Sgonzo} while(0) 67239922Sgonzo 68253006Srpaulo#define MBOX_UNLOCK(sc) do { \ 69253006Srpaulo mtx_unlock(&(sc)->lock); \ 70239922Sgonzo} while(0) 71239922Sgonzo 72239922Sgonzo#ifdef DEBUG 73239922Sgonzo#define dprintf(fmt, args...) printf(fmt, ##args) 74239922Sgonzo#else 75239922Sgonzo#define dprintf(fmt, args...) 76239922Sgonzo#endif 77239922Sgonzo 78239922Sgonzostruct bcm_mbox_softc { 79239922Sgonzo struct mtx lock; 80239922Sgonzo struct resource * mem_res; 81239922Sgonzo struct resource * irq_res; 82239922Sgonzo void* intr_hl; 83239922Sgonzo bus_space_tag_t bst; 84239922Sgonzo bus_space_handle_t bsh; 85239922Sgonzo int msg[BCM2835_MBOX_CHANS]; 86290533Sgonzo int have_message[BCM2835_MBOX_CHANS]; 87290666Sgonzo struct sx property_chan_lock; 88239922Sgonzo}; 89239922Sgonzo 90253006Srpaulo#define mbox_read_4(sc, reg) \ 91253006Srpaulo bus_space_read_4((sc)->bst, (sc)->bsh, reg) 92253006Srpaulo#define mbox_write_4(sc, reg, val) \ 93253006Srpaulo bus_space_write_4((sc)->bst, (sc)->bsh, reg, val) 94239922Sgonzo 95307575Sgonzostatic struct ofw_compat_data compat_data[] = { 96307575Sgonzo {"broadcom,bcm2835-mbox", 1}, 97307575Sgonzo {"brcm,bcm2835-mbox", 1}, 98307575Sgonzo {NULL, 0} 99307575Sgonzo}; 100307575Sgonzo 101279153Sandrewstatic int 102279153Sandrewbcm_mbox_read_msg(struct bcm_mbox_softc *sc, int *ochan) 103279153Sandrew{ 104279153Sandrew uint32_t data; 105279153Sandrew uint32_t msg; 106279153Sandrew int chan; 107279153Sandrew 108279153Sandrew msg = mbox_read_4(sc, REG_READ); 109279153Sandrew dprintf("bcm_mbox_intr: raw data %08x\n", msg); 110279153Sandrew chan = MBOX_CHAN(msg); 111279153Sandrew data = MBOX_DATA(msg); 112279153Sandrew if (sc->msg[chan]) { 113279153Sandrew printf("bcm_mbox_intr: channel %d oveflow\n", chan); 114279153Sandrew return (1); 115279153Sandrew } 116279153Sandrew dprintf("bcm_mbox_intr: chan %d, data %08x\n", chan, data); 117279153Sandrew sc->msg[chan] = msg; 118279153Sandrew 119279153Sandrew if (ochan != NULL) 120279153Sandrew *ochan = chan; 121279153Sandrew 122279153Sandrew return (0); 123279153Sandrew} 124279153Sandrew 125239922Sgonzostatic void 126239922Sgonzobcm_mbox_intr(void *arg) 127239922Sgonzo{ 128239922Sgonzo struct bcm_mbox_softc *sc = arg; 129239922Sgonzo int chan; 130239922Sgonzo 131290533Sgonzo MBOX_LOCK(sc); 132279153Sandrew while (!(mbox_read_4(sc, REG_STATUS) & STATUS_EMPTY)) 133290666Sgonzo if (bcm_mbox_read_msg(sc, &chan) == 0) { 134290666Sgonzo sc->have_message[chan] = 1; 135290533Sgonzo wakeup(&sc->have_message[chan]); 136290666Sgonzo } 137290533Sgonzo MBOX_UNLOCK(sc); 138239922Sgonzo} 139239922Sgonzo 140239922Sgonzostatic int 141239922Sgonzobcm_mbox_probe(device_t dev) 142239922Sgonzo{ 143239922Sgonzo 144261410Sian if (!ofw_bus_status_okay(dev)) 145261410Sian return (ENXIO); 146261410Sian 147307575Sgonzo if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 148307575Sgonzo return (ENXIO); 149239922Sgonzo 150307575Sgonzo device_set_desc(dev, "BCM2835 VideoCore Mailbox"); 151307575Sgonzo 152307575Sgonzo return (BUS_PROBE_DEFAULT); 153239922Sgonzo} 154239922Sgonzo 155239922Sgonzostatic int 156239922Sgonzobcm_mbox_attach(device_t dev) 157239922Sgonzo{ 158239922Sgonzo struct bcm_mbox_softc *sc = device_get_softc(dev); 159239922Sgonzo int i; 160239922Sgonzo int rid = 0; 161239922Sgonzo 162239922Sgonzo sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 163239922Sgonzo if (sc->mem_res == NULL) { 164239922Sgonzo device_printf(dev, "could not allocate memory resource\n"); 165239922Sgonzo return (ENXIO); 166239922Sgonzo } 167239922Sgonzo 168239922Sgonzo sc->bst = rman_get_bustag(sc->mem_res); 169239922Sgonzo sc->bsh = rman_get_bushandle(sc->mem_res); 170239922Sgonzo 171239922Sgonzo rid = 0; 172239922Sgonzo sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 173239922Sgonzo if (sc->irq_res == NULL) { 174239922Sgonzo device_printf(dev, "could not allocate interrupt resource\n"); 175239922Sgonzo return (ENXIO); 176239922Sgonzo } 177239922Sgonzo 178239922Sgonzo /* Setup and enable the timer */ 179252450Srpaulo if (bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE | INTR_TYPE_MISC, 180252450Srpaulo NULL, bcm_mbox_intr, sc, &sc->intr_hl) != 0) { 181252450Srpaulo bus_release_resource(dev, SYS_RES_IRQ, rid, sc->irq_res); 182239922Sgonzo device_printf(dev, "Unable to setup the clock irq handler.\n"); 183239922Sgonzo return (ENXIO); 184239922Sgonzo } 185239922Sgonzo 186261884Sbrueffer mtx_init(&sc->lock, "vcio mbox", NULL, MTX_DEF); 187239922Sgonzo for (i = 0; i < BCM2835_MBOX_CHANS; i++) { 188275963Srpaulo sc->msg[i] = 0; 189290533Sgonzo sc->have_message[i] = 0; 190239922Sgonzo } 191239922Sgonzo 192290666Sgonzo sx_init(&sc->property_chan_lock, "mboxprop"); 193290666Sgonzo 194239922Sgonzo /* Read all pending messages */ 195276297Sloos while ((mbox_read_4(sc, REG_STATUS) & STATUS_EMPTY) == 0) 196276297Sloos (void)mbox_read_4(sc, REG_READ); 197239922Sgonzo 198253006Srpaulo mbox_write_4(sc, REG_CONFIG, CONFIG_DATA_IRQ); 199239922Sgonzo 200239922Sgonzo return (0); 201239922Sgonzo} 202239922Sgonzo 203239922Sgonzo/* 204239922Sgonzo * Mailbox API 205239922Sgonzo */ 206253006Srpaulostatic int 207253006Srpaulobcm_mbox_write(device_t dev, int chan, uint32_t data) 208239922Sgonzo{ 209276303Sloos int limit = 1000; 210253006Srpaulo struct bcm_mbox_softc *sc = device_get_softc(dev); 211239922Sgonzo 212239922Sgonzo dprintf("bcm_mbox_write: chan %d, data %08x\n", chan, data); 213253006Srpaulo MBOX_LOCK(sc); 214290533Sgonzo sc->have_message[chan] = 0; 215276303Sloos while ((mbox_read_4(sc, REG_STATUS) & STATUS_FULL) && --limit) 216276303Sloos DELAY(5); 217239922Sgonzo if (limit == 0) { 218239922Sgonzo printf("bcm_mbox_write: STATUS_FULL stuck"); 219253006Srpaulo MBOX_UNLOCK(sc); 220239922Sgonzo return (EAGAIN); 221239922Sgonzo } 222253006Srpaulo mbox_write_4(sc, REG_WRITE, MBOX_MSG(chan, data)); 223276303Sloos MBOX_UNLOCK(sc); 224239922Sgonzo 225239922Sgonzo return (0); 226239922Sgonzo} 227239922Sgonzo 228253006Srpaulostatic int 229253006Srpaulobcm_mbox_read(device_t dev, int chan, uint32_t *data) 230239922Sgonzo{ 231253006Srpaulo struct bcm_mbox_softc *sc = device_get_softc(dev); 232279153Sandrew int err, read_chan; 233239922Sgonzo 234239922Sgonzo dprintf("bcm_mbox_read: chan %d\n", chan); 235279153Sandrew 236279153Sandrew err = 0; 237253006Srpaulo MBOX_LOCK(sc); 238279153Sandrew if (!cold) { 239290533Sgonzo if (sc->have_message[chan] == 0) { 240290533Sgonzo if (mtx_sleep(&sc->have_message[chan], &sc->lock, 0, 241290533Sgonzo "mbox", 10*hz) != 0) { 242290533Sgonzo device_printf(dev, "timeout waiting for message on chan %d\n", chan); 243290533Sgonzo err = ETIMEDOUT; 244290533Sgonzo } 245279153Sandrew } 246279153Sandrew } else { 247279153Sandrew do { 248279153Sandrew /* Wait for a message */ 249279153Sandrew while ((mbox_read_4(sc, REG_STATUS) & STATUS_EMPTY)) 250279153Sandrew ; 251279153Sandrew /* Read the message */ 252279153Sandrew if (bcm_mbox_read_msg(sc, &read_chan) != 0) { 253279153Sandrew err = EINVAL; 254279153Sandrew goto out; 255279153Sandrew } 256279153Sandrew } while (read_chan != chan); 257275963Srpaulo } 258275963Srpaulo /* 259275963Srpaulo * get data from intr handler, the same channel is never coming 260275963Srpaulo * because of holding sc lock. 261275963Srpaulo */ 262275963Srpaulo *data = MBOX_DATA(sc->msg[chan]); 263275963Srpaulo sc->msg[chan] = 0; 264290533Sgonzo sc->have_message[chan] = 0; 265279153Sandrewout: 266253006Srpaulo MBOX_UNLOCK(sc); 267239922Sgonzo dprintf("bcm_mbox_read: chan %d, data %08x\n", chan, *data); 268239922Sgonzo 269279153Sandrew return (err); 270239922Sgonzo} 271253006Srpaulo 272253006Srpaulostatic device_method_t bcm_mbox_methods[] = { 273253006Srpaulo DEVMETHOD(device_probe, bcm_mbox_probe), 274253006Srpaulo DEVMETHOD(device_attach, bcm_mbox_attach), 275253006Srpaulo 276253006Srpaulo DEVMETHOD(mbox_read, bcm_mbox_read), 277253006Srpaulo DEVMETHOD(mbox_write, bcm_mbox_write), 278253006Srpaulo 279253006Srpaulo DEVMETHOD_END 280253006Srpaulo}; 281253006Srpaulo 282253006Srpaulostatic driver_t bcm_mbox_driver = { 283253006Srpaulo "mbox", 284253006Srpaulo bcm_mbox_methods, 285253006Srpaulo sizeof(struct bcm_mbox_softc), 286253006Srpaulo}; 287253006Srpaulo 288253006Srpaulostatic devclass_t bcm_mbox_devclass; 289253006Srpaulo 290253006SrpauloDRIVER_MODULE(mbox, simplebus, bcm_mbox_driver, bcm_mbox_devclass, 0, 0); 291280283Sandrew 292280283Sandrewstatic void 293280283Sandrewbcm2835_mbox_dma_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) 294280283Sandrew{ 295280283Sandrew bus_addr_t *addr; 296280283Sandrew 297280283Sandrew if (err) 298280283Sandrew return; 299280283Sandrew addr = (bus_addr_t *)arg; 300280283Sandrew *addr = PHYS_TO_VCBUS(segs[0].ds_addr); 301280283Sandrew} 302280283Sandrew 303280294Sandrewstatic void * 304280294Sandrewbcm2835_mbox_init_dma(device_t dev, size_t len, bus_dma_tag_t *tag, 305280294Sandrew bus_dmamap_t *map, bus_addr_t *phys) 306280283Sandrew{ 307280294Sandrew void *buf; 308280283Sandrew int err; 309280283Sandrew 310280283Sandrew err = bus_dma_tag_create(bus_get_dma_tag(dev), 16, 0, 311280283Sandrew BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 312280294Sandrew len, 1, len, 0, NULL, NULL, tag); 313280283Sandrew if (err != 0) { 314280283Sandrew device_printf(dev, "can't create DMA tag\n"); 315280294Sandrew return (NULL); 316280283Sandrew } 317280283Sandrew 318280294Sandrew err = bus_dmamem_alloc(*tag, &buf, 0, map); 319280283Sandrew if (err != 0) { 320280294Sandrew bus_dma_tag_destroy(*tag); 321280283Sandrew device_printf(dev, "can't allocate dmamem\n"); 322280294Sandrew return (NULL); 323280283Sandrew } 324280283Sandrew 325282049Sloos err = bus_dmamap_load(*tag, *map, buf, len, bcm2835_mbox_dma_cb, 326280294Sandrew phys, 0); 327280283Sandrew if (err != 0) { 328280294Sandrew bus_dmamem_free(*tag, buf, *map); 329280294Sandrew bus_dma_tag_destroy(*tag); 330280283Sandrew device_printf(dev, "can't load DMA map\n"); 331280294Sandrew return (NULL); 332280294Sandrew } 333280294Sandrew 334280294Sandrew return (buf); 335280294Sandrew} 336280294Sandrew 337282357Sloosstatic int 338282357Sloosbcm2835_mbox_err(device_t dev, bus_addr_t msg_phys, uint32_t resp_phys, 339282357Sloos struct bcm2835_mbox_hdr *msg, size_t len) 340282357Sloos{ 341282357Sloos int idx; 342282357Sloos struct bcm2835_mbox_tag_hdr *tag; 343282357Sloos uint8_t *last; 344282357Sloos 345282357Sloos if ((uint32_t)msg_phys != resp_phys) { 346282357Sloos device_printf(dev, "response channel mismatch\n"); 347282357Sloos return (EIO); 348282357Sloos } 349282357Sloos if (msg->code != BCM2835_MBOX_CODE_RESP_SUCCESS) { 350282357Sloos device_printf(dev, "mbox response error\n"); 351282357Sloos return (EIO); 352282357Sloos } 353282357Sloos 354282357Sloos /* Loop until the end tag. */ 355282357Sloos tag = (struct bcm2835_mbox_tag_hdr *)(msg + 1); 356282357Sloos last = (uint8_t *)msg + len; 357282357Sloos for (idx = 0; tag->tag != 0; idx++) { 358282357Sloos if ((tag->val_len & BCM2835_MBOX_TAG_VAL_LEN_RESPONSE) == 0) { 359282357Sloos device_printf(dev, "tag %d response error\n", idx); 360282357Sloos return (EIO); 361282357Sloos } 362282357Sloos /* Clear the response bit. */ 363282357Sloos tag->val_len &= ~BCM2835_MBOX_TAG_VAL_LEN_RESPONSE; 364282357Sloos 365282357Sloos /* Next tag. */ 366282357Sloos tag = (struct bcm2835_mbox_tag_hdr *)((uint8_t *)tag + 367282357Sloos sizeof(*tag) + tag->val_buf_size); 368282357Sloos 369282357Sloos if ((uint8_t *)tag > last) { 370282357Sloos device_printf(dev, "mbox buffer size error\n"); 371282357Sloos return (EIO); 372282357Sloos } 373282357Sloos } 374282357Sloos 375282357Sloos return (0); 376282357Sloos} 377282357Sloos 378280294Sandrewint 379290381Sgonzobcm2835_mbox_property(void *msg, size_t msg_size) 380280294Sandrew{ 381290666Sgonzo struct bcm_mbox_softc *sc; 382290381Sgonzo struct msg_set_power_state *buf; 383280294Sandrew bus_dma_tag_t msg_tag; 384280294Sandrew bus_dmamap_t msg_map; 385280294Sandrew bus_addr_t msg_phys; 386280294Sandrew uint32_t reg; 387280294Sandrew device_t mbox; 388290381Sgonzo int err; 389280294Sandrew 390280294Sandrew /* get mbox device */ 391280294Sandrew mbox = devclass_get_device(devclass_find("mbox"), 0); 392290381Sgonzo if (mbox == NULL) 393280283Sandrew return (ENXIO); 394280283Sandrew 395290666Sgonzo sc = device_get_softc(mbox); 396290666Sgonzo sx_xlock(&sc->property_chan_lock); 397290666Sgonzo 398280294Sandrew /* Allocate memory for the message */ 399290381Sgonzo buf = bcm2835_mbox_init_dma(mbox, msg_size, &msg_tag, &msg_map, 400280294Sandrew &msg_phys); 401290666Sgonzo if (buf == NULL) { 402290666Sgonzo err = ENOMEM; 403290666Sgonzo goto out; 404290666Sgonzo } 405280283Sandrew 406290381Sgonzo memcpy(buf, msg, msg_size); 407280283Sandrew 408280283Sandrew bus_dmamap_sync(msg_tag, msg_map, 409290381Sgonzo BUS_DMASYNC_PREWRITE); 410280283Sandrew 411280283Sandrew MBOX_WRITE(mbox, BCM2835_MBOX_CHAN_PROP, (uint32_t)msg_phys); 412280283Sandrew MBOX_READ(mbox, BCM2835_MBOX_CHAN_PROP, ®); 413280283Sandrew 414290381Sgonzo bus_dmamap_sync(msg_tag, msg_map, 415290381Sgonzo BUS_DMASYNC_PREREAD); 416290381Sgonzo 417290381Sgonzo memcpy(msg, buf, msg_size); 418290381Sgonzo 419290381Sgonzo err = bcm2835_mbox_err(mbox, msg_phys, reg, 420290381Sgonzo (struct bcm2835_mbox_hdr *)msg, msg_size); 421290381Sgonzo 422280283Sandrew bus_dmamap_unload(msg_tag, msg_map); 423290381Sgonzo bus_dmamem_free(msg_tag, buf, msg_map); 424280283Sandrew bus_dma_tag_destroy(msg_tag); 425290666Sgonzoout: 426290666Sgonzo sx_xunlock(&sc->property_chan_lock); 427290381Sgonzo return (err); 428280283Sandrew} 429280294Sandrew 430280294Sandrewint 431290381Sgonzobcm2835_mbox_set_power_state(uint32_t device_id, boolean_t on) 432280294Sandrew{ 433290381Sgonzo struct msg_set_power_state msg; 434290381Sgonzo int err; 435280294Sandrew 436290381Sgonzo memset(&msg, 0, sizeof(msg)); 437290381Sgonzo msg.hdr.buf_size = sizeof(msg); 438290381Sgonzo msg.hdr.code = BCM2835_MBOX_CODE_REQ; 439290381Sgonzo msg.tag_hdr.tag = BCM2835_MBOX_TAG_SET_POWER_STATE; 440290381Sgonzo msg.tag_hdr.val_buf_size = sizeof(msg.body); 441290381Sgonzo msg.tag_hdr.val_len = sizeof(msg.body.req); 442290381Sgonzo msg.body.req.device_id = device_id; 443290381Sgonzo msg.body.req.state = (on ? BCM2835_MBOX_POWER_ON : 0) | 444290381Sgonzo BCM2835_MBOX_POWER_WAIT; 445290381Sgonzo msg.end_tag = 0; 446280294Sandrew 447290381Sgonzo err = bcm2835_mbox_property(&msg, sizeof(msg)); 448280294Sandrew 449290381Sgonzo return (err); 450290381Sgonzo} 451280294Sandrew 452290381Sgonzoint 453290381Sgonzobcm2835_mbox_get_clock_rate(uint32_t clock_id, uint32_t *hz) 454290381Sgonzo{ 455290381Sgonzo struct msg_get_clock_rate msg; 456290381Sgonzo int err; 457280294Sandrew 458290381Sgonzo memset(&msg, 0, sizeof(msg)); 459290381Sgonzo msg.hdr.buf_size = sizeof(msg); 460290381Sgonzo msg.hdr.code = BCM2835_MBOX_CODE_REQ; 461290381Sgonzo msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_CLOCK_RATE; 462290381Sgonzo msg.tag_hdr.val_buf_size = sizeof(msg.body); 463290381Sgonzo msg.tag_hdr.val_len = sizeof(msg.body.req); 464290381Sgonzo msg.body.req.clock_id = clock_id; 465290381Sgonzo msg.end_tag = 0; 466280294Sandrew 467290381Sgonzo err = bcm2835_mbox_property(&msg, sizeof(msg)); 468290381Sgonzo *hz = msg.body.resp.rate_hz; 469280294Sandrew 470290381Sgonzo return (err); 471280294Sandrew} 472282357Sloos 473282357Sloosint 474290381Sgonzobcm2835_mbox_fb_get_w_h(struct bcm2835_fb_config *fb) 475282357Sloos{ 476282357Sloos int err; 477290381Sgonzo struct msg_fb_get_w_h msg; 478282357Sloos 479290381Sgonzo memset(&msg, 0, sizeof(msg)); 480290381Sgonzo msg.hdr.buf_size = sizeof(msg); 481290381Sgonzo msg.hdr.code = BCM2835_MBOX_CODE_REQ; 482290381Sgonzo BCM2835_MBOX_INIT_TAG(&msg.physical_w_h, GET_PHYSICAL_W_H); 483290381Sgonzo msg.physical_w_h.tag_hdr.val_len = 0; 484290381Sgonzo msg.end_tag = 0; 485282357Sloos 486290381Sgonzo err = bcm2835_mbox_property(&msg, sizeof(msg)); 487282357Sloos if (err == 0) { 488290381Sgonzo fb->xres = msg.physical_w_h.body.resp.width; 489290381Sgonzo fb->yres = msg.physical_w_h.body.resp.height; 490282357Sloos } 491282357Sloos 492282357Sloos return (err); 493282357Sloos} 494282357Sloos 495282357Sloosint 496290381Sgonzobcm2835_mbox_fb_init(struct bcm2835_fb_config *fb) 497282357Sloos{ 498282357Sloos int err; 499290381Sgonzo struct msg_fb_setup msg; 500282357Sloos 501290381Sgonzo memset(&msg, 0, sizeof(msg)); 502290381Sgonzo msg.hdr.buf_size = sizeof(msg); 503290381Sgonzo msg.hdr.code = BCM2835_MBOX_CODE_REQ; 504290381Sgonzo BCM2835_MBOX_INIT_TAG(&msg.physical_w_h, SET_PHYSICAL_W_H); 505290381Sgonzo msg.physical_w_h.body.req.width = fb->xres; 506290381Sgonzo msg.physical_w_h.body.req.height = fb->yres; 507290381Sgonzo BCM2835_MBOX_INIT_TAG(&msg.virtual_w_h, SET_VIRTUAL_W_H); 508290381Sgonzo msg.virtual_w_h.body.req.width = fb->vxres; 509290381Sgonzo msg.virtual_w_h.body.req.height = fb->vyres; 510298428Sgonzo BCM2835_MBOX_INIT_TAG(&msg.offset, SET_VIRTUAL_OFFSET); 511290381Sgonzo msg.offset.body.req.x = fb->xoffset; 512290381Sgonzo msg.offset.body.req.y = fb->yoffset; 513290381Sgonzo BCM2835_MBOX_INIT_TAG(&msg.depth, SET_DEPTH); 514290381Sgonzo msg.depth.body.req.bpp = fb->bpp; 515290381Sgonzo BCM2835_MBOX_INIT_TAG(&msg.alpha, SET_ALPHA_MODE); 516290381Sgonzo msg.alpha.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED; 517290381Sgonzo BCM2835_MBOX_INIT_TAG(&msg.buffer, ALLOCATE_BUFFER); 518290381Sgonzo msg.buffer.body.req.alignment = PAGE_SIZE; 519290381Sgonzo BCM2835_MBOX_INIT_TAG(&msg.pitch, GET_PITCH); 520290381Sgonzo msg.end_tag = 0; 521282357Sloos 522290381Sgonzo err = bcm2835_mbox_property(&msg, sizeof(msg)); 523282357Sloos if (err == 0) { 524290381Sgonzo fb->xres = msg.physical_w_h.body.resp.width; 525290381Sgonzo fb->yres = msg.physical_w_h.body.resp.height; 526290381Sgonzo fb->vxres = msg.virtual_w_h.body.resp.width; 527290381Sgonzo fb->vyres = msg.virtual_w_h.body.resp.height; 528290381Sgonzo fb->xoffset = msg.offset.body.resp.x; 529290381Sgonzo fb->yoffset = msg.offset.body.resp.y; 530290381Sgonzo fb->pitch = msg.pitch.body.resp.pitch; 531290381Sgonzo fb->base = VCBUS_TO_PHYS(msg.buffer.body.resp.fb_address); 532290381Sgonzo fb->size = msg.buffer.body.resp.fb_size; 533282357Sloos } 534282357Sloos 535282357Sloos return (err); 536282357Sloos} 537