pxa_obio.c revision 226832
1/*- 2 * Copyright (c) 2006 Benno Rice. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25#include <sys/cdefs.h> 26__FBSDID("$FreeBSD: head/sys/arm/xscale/pxa/pxa_obio.c 226832 2011-10-27 10:21:40Z kevlo $"); 27 28#include <sys/param.h> 29#include <sys/systm.h> 30#include <sys/bus.h> 31#include <sys/kernel.h> 32#include <sys/module.h> 33#include <sys/malloc.h> 34#include <sys/rman.h> 35#include <machine/bus.h> 36#include <machine/intr.h> 37 38#include <arm/xscale/pxa/pxavar.h> 39#include <arm/xscale/pxa/pxareg.h> 40 41static void pxa_identify(driver_t *, device_t); 42static int pxa_probe(device_t); 43static int pxa_attach(device_t); 44 45static int pxa_print_child(device_t, device_t); 46 47static int pxa_setup_intr(device_t, device_t, struct resource *, int, 48 driver_filter_t *, driver_intr_t *, void *, void **); 49static int pxa_read_ivar(device_t, device_t, int, uintptr_t *); 50 51static struct resource_list * pxa_get_resource_list(device_t, device_t); 52static struct resource * pxa_alloc_resource(device_t, device_t, int, 53 int *, u_long, u_long, u_long, u_int); 54static int pxa_release_resource(device_t, device_t, int, 55 int, struct resource *); 56static int pxa_activate_resource(device_t, device_t, 57 int, int, struct resource *); 58 59static struct resource * pxa_alloc_gpio_irq(device_t, device_t, int, 60 int *, u_long, u_long, u_long, u_int); 61 62struct obio_device { 63 const char *od_name; 64 u_long od_base; 65 u_long od_size; 66 u_int od_irqs[5]; 67 struct resource_list od_resources; 68}; 69 70static struct obio_device obio_devices[] = { 71 { "icu", PXA2X0_INTCTL_BASE, PXA2X0_INTCTL_SIZE, { 0 } }, 72 { "timer", PXA2X0_OST_BASE, PXA2X0_OST_SIZE, { PXA2X0_INT_OST0, PXA2X0_INT_OST1, PXA2X0_INT_OST2, PXA2X0_INT_OST3, 0 } }, 73 { "dmac", PXA2X0_DMAC_BASE, PXA2X0_DMAC_SIZE, { PXA2X0_INT_DMA, 0 } }, 74 { "gpio", PXA2X0_GPIO_BASE, PXA250_GPIO_SIZE, { PXA2X0_INT_GPIO0, PXA2X0_INT_GPIO1, PXA2X0_INT_GPION, 0 } }, 75 { "uart", PXA2X0_FFUART_BASE, PXA2X0_FFUART_SIZE, { PXA2X0_INT_FFUART, 0 } }, 76 { "uart", PXA2X0_BTUART_BASE, PXA2X0_BTUART_SIZE, { PXA2X0_INT_BTUART, 0 } }, 77 { "uart", PXA2X0_STUART_BASE, PXA2X0_STUART_SIZE, { PXA2X0_INT_STUART, 0 } }, 78 { "uart", PXA2X0_HWUART_BASE, PXA2X0_HWUART_SIZE, { PXA2X0_INT_HWUART, 0 } }, 79 { "smi", PXA2X0_CS0_START, PXA2X0_CS_SIZE * 6, { 0 } }, 80 { NULL, 0, 0, { 0 } } 81}; 82 83void 84pxa_identify(driver_t *driver, device_t parent) 85{ 86 87 BUS_ADD_CHILD(parent, 0, "pxa", 0); 88} 89 90int 91pxa_probe(device_t dev) 92{ 93 94 device_set_desc(dev, "XScale PXA On-board IO"); 95 return (0); 96} 97 98int 99pxa_attach(device_t dev) 100{ 101 struct obio_softc *sc; 102 struct obio_device *od; 103 int i; 104 device_t child; 105 106 sc = device_get_softc(dev); 107 108 sc->obio_bst = obio_tag; 109 110 sc->obio_mem.rm_type = RMAN_ARRAY; 111 sc->obio_mem.rm_descr = "PXA2X0 OBIO Memory"; 112 if (rman_init(&sc->obio_mem) != 0) 113 panic("pxa_attach: failed to init obio mem rman"); 114 if (rman_manage_region(&sc->obio_mem, 0, PXA250_PERIPH_END) != 0) 115 panic("pxa_attach: failed to set up obio mem rman"); 116 117 sc->obio_irq.rm_type = RMAN_ARRAY; 118 sc->obio_irq.rm_descr = "PXA2X0 OBIO IRQ"; 119 if (rman_init(&sc->obio_irq) != 0) 120 panic("pxa_attach: failed to init obio irq rman"); 121 if (rman_manage_region(&sc->obio_irq, 0, 31) != 0) 122 panic("pxa_attach: failed to set up obio irq rman (main irqs)"); 123 if (rman_manage_region(&sc->obio_irq, IRQ_GPIO0, IRQ_GPIO_MAX) != 0) 124 panic("pxa_attach: failed to set up obio irq rman (gpio irqs)"); 125 126 for (od = obio_devices; od->od_name != NULL; od++) { 127 resource_list_init(&od->od_resources); 128 129 resource_list_add(&od->od_resources, SYS_RES_MEMORY, 0, 130 od->od_base, od->od_base + od->od_size, od->od_size); 131 132 for (i = 0; od->od_irqs[i] != 0; i++) { 133 resource_list_add(&od->od_resources, SYS_RES_IRQ, i, 134 od->od_irqs[i], od->od_irqs[i], 1); 135 } 136 137 child = device_add_child(dev, od->od_name, -1); 138 device_set_ivars(child, od); 139 } 140 141 bus_generic_probe(dev); 142 bus_generic_attach(dev); 143 144 return (0); 145} 146 147static int 148pxa_print_child(device_t dev, device_t child) 149{ 150 struct obio_device *od; 151 int retval; 152 153 od = (struct obio_device *)device_get_ivars(child); 154 if (od == NULL) 155 panic("Unknown device on pxa0"); 156 157 retval = 0; 158 159 retval += bus_print_child_header(dev, child); 160 161 retval += resource_list_print_type(&od->od_resources, "at mem", 162 SYS_RES_MEMORY, "0x%08lx"); 163 retval += resource_list_print_type(&od->od_resources, "irq", 164 SYS_RES_IRQ, "%ld"); 165 166 retval += bus_print_child_footer(dev, child); 167 168 return (retval); 169} 170 171static int 172pxa_setup_intr(device_t dev, device_t child, struct resource *irq, int flags, 173 driver_filter_t *filter, driver_intr_t *ithread, void *arg, void **cookiep) 174{ 175 struct obio_softc *sc; 176 int error; 177 178 sc = (struct obio_softc *)device_get_softc(dev); 179 180 error = BUS_SETUP_INTR(device_get_parent(dev), child, irq, flags, 181 filter, ithread, arg, cookiep); 182 if (error) 183 return (error); 184 arm_unmask_irq(rman_get_start(irq)); 185 return (0); 186} 187 188static int 189pxa_teardown_intr(device_t dev, device_t child, struct resource *ires, 190 void *cookie) 191{ 192 return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, ires, cookie));} 193 194static int 195pxa_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 196{ 197 struct obio_device *od; 198 199 od = (struct obio_device *)device_get_ivars(child); 200 201 switch (which) { 202 case PXA_IVAR_BASE: 203 *((u_long *)result) = od->od_base; 204 break; 205 206 default: 207 return (ENOENT); 208 } 209 210 return (0); 211} 212 213static struct resource_list * 214pxa_get_resource_list(device_t dev, device_t child) 215{ 216 struct obio_device *od; 217 218 od = (struct obio_device *)device_get_ivars(child); 219 220 if (od == NULL) 221 return (NULL); 222 223 return (&od->od_resources); 224} 225 226static struct resource * 227pxa_alloc_resource(device_t dev, device_t child, int type, int *rid, 228 u_long start, u_long end, u_long count, u_int flags) 229{ 230 struct obio_softc *sc; 231 struct obio_device *od; 232 struct resource *rv; 233 struct resource_list *rl; 234 struct resource_list_entry *rle; 235 struct rman *rm; 236 int needactivate; 237 238 sc = (struct obio_softc *)device_get_softc(dev); 239 od = (struct obio_device *)device_get_ivars(child); 240 rl = &od->od_resources; 241 242 rle = resource_list_find(rl, type, *rid); 243 if (rle == NULL) { 244 /* We can allocate GPIO-based IRQs lazily. */ 245 if (type == SYS_RES_IRQ) 246 return (pxa_alloc_gpio_irq(dev, child, type, rid, 247 start, end, count, flags)); 248 return (NULL); 249 } 250 if (rle->res != NULL) 251 panic("pxa_alloc_resource: resource is busy"); 252 253 switch (type) { 254 case SYS_RES_IRQ: 255 rm = &sc->obio_irq; 256 break; 257 258 case SYS_RES_MEMORY: 259 rm = &sc->obio_mem; 260 break; 261 262 default: 263 return (NULL); 264 } 265 266 needactivate = flags & RF_ACTIVE; 267 flags &= ~RF_ACTIVE; 268 rv = rman_reserve_resource(rm, rle->start, rle->end, rle->count, flags, 269 child); 270 if (rv == NULL) 271 return (NULL); 272 rle->res = rv; 273 rman_set_rid(rv, *rid); 274 if (type == SYS_RES_MEMORY) { 275 rman_set_bustag(rv, sc->obio_bst); 276 rman_set_bushandle(rv, rle->start); 277 } 278 279 if (needactivate) { 280 if (bus_activate_resource(child, type, *rid, rv)) { 281 rman_release_resource(rv); 282 return (NULL); 283 } 284 } 285 286 return (rv); 287} 288 289static int 290pxa_release_resource(device_t dev, device_t child, int type, int rid, 291 struct resource *r) 292{ 293 struct obio_device *od; 294 struct resource_list *rl; 295 struct resource_list_entry *rle; 296 297 od = (struct obio_device *)device_get_ivars(child); 298 rl = &od->od_resources; 299 300 if (type == SYS_RES_IOPORT) 301 type = SYS_RES_MEMORY; 302 303 rle = resource_list_find(rl, type, rid); 304 305 if (!rle) 306 panic("pxa_release_resource: can't find resource"); 307 if (!rle->res) 308 panic("pxa_release_resource: resource entry is not busy"); 309 310 rman_release_resource(rle->res); 311 rle->res = NULL; 312 313 return (0); 314} 315 316static int 317pxa_activate_resource(device_t dev, device_t child, int type, int rid, 318 struct resource *r) 319{ 320 321 return (rman_activate_resource(r)); 322} 323 324static device_method_t pxa_methods[] = { 325 DEVMETHOD(device_identify, pxa_identify), 326 DEVMETHOD(device_probe, pxa_probe), 327 DEVMETHOD(device_attach, pxa_attach), 328 329 DEVMETHOD(bus_print_child, pxa_print_child), 330 331 DEVMETHOD(bus_read_ivar, pxa_read_ivar), 332 DEVMETHOD(bus_setup_intr, pxa_setup_intr), 333 DEVMETHOD(bus_teardown_intr, pxa_teardown_intr), 334 335 DEVMETHOD(bus_get_resource_list, pxa_get_resource_list), 336 DEVMETHOD(bus_alloc_resource, pxa_alloc_resource), 337 DEVMETHOD(bus_release_resource, pxa_release_resource), 338 DEVMETHOD(bus_activate_resource, pxa_activate_resource), 339 340 {0, 0} 341}; 342 343static driver_t pxa_driver = { 344 "pxa", 345 pxa_methods, 346 sizeof(struct obio_softc), 347}; 348 349static devclass_t pxa_devclass; 350 351DRIVER_MODULE(pxa, nexus, pxa_driver, pxa_devclass, 0, 0); 352 353static struct resource * 354pxa_alloc_gpio_irq(device_t dev, device_t child, int type, int *rid, 355 u_long start, u_long end, u_long count, u_int flags) 356{ 357 struct obio_softc *sc; 358 struct obio_device *od; 359 struct resource_list *rl; 360 struct resource_list_entry *rle; 361 struct resource *rv; 362 struct rman *rm; 363 int needactivate; 364 365 sc = device_get_softc(dev); 366 od = device_get_ivars(child); 367 rl = &od->od_resources; 368 rm = &sc->obio_irq; 369 370 needactivate = flags & RF_ACTIVE; 371 flags &= ~RF_ACTIVE; 372 rv = rman_reserve_resource(rm, start, end, count, flags, child); 373 if (rv == NULL) 374 return (NULL); 375 376 resource_list_add(rl, type, *rid, start, end, count); 377 rle = resource_list_find(rl, type, *rid); 378 if (rle == NULL) 379 panic("pxa_alloc_gpio_irq: unexpectedly can't find resource"); 380 381 rle->res = rv; 382 rle->start = rman_get_start(rv); 383 rle->end = rman_get_end(rv); 384 rle->count = count; 385 386 if (needactivate) { 387 if (bus_activate_resource(child, type, *rid, rv)) { 388 rman_release_resource(rv); 389 return (NULL); 390 } 391 } 392 393 if (bootverbose) 394 device_printf(dev, "lazy allocation of irq %ld for %s\n", 395 start, device_get_nameunit(child)); 396 397 return (rv); 398} 399