1 /* $NetBSD: ifpga_pci.c,v 1.13 2009/07/21 16:04:16 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 2001 ARM Ltd 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the company may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * Copyright (c) 1997,1998 Mark Brinicombe. 32 * Copyright (c) 1997,1998 Causality Limited 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. All advertising materials mentioning features or use of this software 44 * must display the following acknowledgement: 45 * This product includes software developed by Mark Brinicombe 46 * for the NetBSD Project. 47 * 4. The name of the company nor the name of the author may be used to 48 * endorse or promote products derived from this software without specific 49 * prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 52 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 53 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 54 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 55 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 56 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 57 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 */ 63 64 #define _ARM32_BUS_DMA_PRIVATE 65 66 #include <sys/cdefs.h> 67 __KERNEL_RCSID(0, "$NetBSD: ifpga_pci.c,v 1.13 2009/07/21 16:04:16 dyoung Exp $"); 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/conf.h> 72 #include <sys/malloc.h> 73 #include <sys/device.h> 74 75 #include <evbarm/integrator/int_bus_dma.h> 76 77 #include <machine/intr.h> 78 79 #include <dev/pci/pcireg.h> 80 #include <dev/pci/pcivar.h> 81 82 #include <evbarm/ifpga/ifpgareg.h> 83 #include <evbarm/ifpga/ifpgamem.h> 84 #include <evbarm/ifpga/ifpga_pcivar.h> 85 #include <evbarm/dev/v360reg.h> 86 87 88 void ifpga_pci_attach_hook (device_t, device_t, 89 struct pcibus_attach_args *); 90 int ifpga_pci_bus_maxdevs (void *, int); 91 pcitag_t ifpga_pci_make_tag (void *, int, int, int); 92 void ifpga_pci_decompose_tag (void *, pcitag_t, int *, int *, 93 int *); 94 pcireg_t ifpga_pci_conf_read (void *, pcitag_t, int); 95 void ifpga_pci_conf_write (void *, pcitag_t, int, pcireg_t); 96 int ifpga_pci_intr_map (struct pci_attach_args *, 97 pci_intr_handle_t *); 98 const char *ifpga_pci_intr_string (void *, pci_intr_handle_t); 99 const struct evcnt *ifpga_pci_intr_evcnt (void *, pci_intr_handle_t); 100 void *ifpga_pci_intr_establish (void *, pci_intr_handle_t, int, 101 int (*)(void *), void *); 102 void ifpga_pci_intr_disestablish (void *, void *); 103 104 struct arm32_pci_chipset ifpga_pci_chipset = { 105 NULL, /* conf_v */ 106 ifpga_pci_attach_hook, 107 ifpga_pci_bus_maxdevs, 108 ifpga_pci_make_tag, 109 ifpga_pci_decompose_tag, 110 ifpga_pci_conf_read, 111 ifpga_pci_conf_write, 112 NULL, /* intr_v */ 113 ifpga_pci_intr_map, 114 ifpga_pci_intr_string, 115 ifpga_pci_intr_evcnt, 116 ifpga_pci_intr_establish, 117 ifpga_pci_intr_disestablish 118 }; 119 120 /* 121 * Use the integrator-specific bus_dma routines. 122 */ 123 struct arm32_bus_dma_tag ifpga_pci_bus_dma_tag = { 124 0, 125 0, 126 NULL, 127 _bus_dmamap_create, 128 _bus_dmamap_destroy, 129 _bus_dmamap_load, 130 _bus_dmamap_load_mbuf, 131 _bus_dmamap_load_uio, 132 _bus_dmamap_load_raw, 133 _bus_dmamap_unload, 134 _bus_dmamap_sync, /* pre */ 135 NULL, /* post */ 136 _bus_dmamem_alloc, 137 _bus_dmamem_free, 138 _bus_dmamem_map, 139 _bus_dmamem_unmap, 140 _bus_dmamem_mmap, 141 }; 142 143 /* 144 * Currently we only support 12 devices as we select directly in the 145 * type 0 config cycle 146 * (See conf_{read,write} for more detail 147 */ 148 #define MAX_PCI_DEVICES 21 149 150 /*static int 151 pci_intr(void *arg) 152 { 153 printf("pci int %x\n", (int)arg); 154 return 0; 155 }*/ 156 157 158 void 159 ifpga_pci_attach_hook(device_t parent, device_t self, 160 struct pcibus_attach_args *pba) 161 { 162 #ifdef PCI_DEBUG 163 printf("ifpga_pci_attach_hook()\n"); 164 #endif 165 } 166 167 int 168 ifpga_pci_bus_maxdevs(void *pcv, int busno) 169 { 170 #ifdef PCI_DEBUG 171 printf("ifpga_pci_bus_maxdevs(pcv=%p, busno=%d)\n", pcv, busno); 172 #endif 173 return MAX_PCI_DEVICES; 174 } 175 176 pcitag_t 177 ifpga_pci_make_tag(void *pcv, int bus, int device, int function) 178 { 179 #ifdef PCI_DEBUG 180 printf("ifpga_pci_make_tag(pcv=%p, bus=%d, device=%d, function=%d)\n", 181 pcv, bus, device, function); 182 #endif 183 return (bus << 16) | (device << 11) | (function << 8); 184 } 185 186 void 187 ifpga_pci_decompose_tag(void *pcv, pcitag_t tag, int *busp, int *devicep, 188 int *functionp) 189 { 190 #ifdef PCI_DEBUG 191 printf("ifpga_pci_decompose_tag(pcv=%p, tag=0x%08lx, bp=%p, dp=%p, " 192 "fp=%p)\n", pcv, tag, busp, devicep, functionp); 193 #endif 194 195 if (busp != NULL) 196 *busp = (tag >> 16) & 0xff; 197 if (devicep != NULL) 198 *devicep = (tag >> 11) & 0x1f; 199 if (functionp != NULL) 200 *functionp = (tag >> 8) & 0x7; 201 } 202 203 pcireg_t 204 ifpga_pci_conf_read(void *pcv, pcitag_t tag, int reg) 205 { 206 pcireg_t data; 207 struct ifpga_pci_softc *sc = (struct ifpga_pci_softc *)pcv; 208 int bus, device, function; 209 u_int address; 210 211 ifpga_pci_decompose_tag(pcv, tag, &bus, &device, &function); 212 213 /* Reset the appertures so that we can talk to the register space. */ 214 bus_space_write_4(sc->sc_memt, sc->sc_reg_ioh, V360_LB_BASE0, 215 IFPGA_PCI_APP0_512MB_BASE); 216 bus_space_write_4(sc->sc_memt, sc->sc_reg_ioh, V360_LB_BASE1, 217 IFPGA_PCI_APP1_CONF_BASE); 218 219 if (bus == 0) { 220 address = (1 << (device + 11)) | reg; 221 bus_space_write_2(sc->sc_memt, sc->sc_reg_ioh, V360_LB_MAP1, 222 IFPGA_PCI_APP1_CONF_T0_MAP | ((address >> 16) & 0xff00)); 223 224 /* Read the value from the bus... */ 225 data = bus_space_read_4(sc->sc_iot, sc->sc_conf_ioh, 226 address & 0x00ffffff); 227 228 } else { 229 bus_space_write_2(sc->sc_memt, sc->sc_reg_ioh, V360_LB_MAP1, 230 IFPGA_PCI_APP1_CONF_T1_MAP); 231 232 /* Read the value from the bus... */ 233 data = bus_space_read_4(sc->sc_iot, sc->sc_conf_ioh, 234 tag | reg); 235 } 236 /* ... and put the memory spaces back again. */ 237 238 bus_space_write_4(sc->sc_memt, sc->sc_reg_ioh, V360_LB_BASE1, 239 IFPGA_PCI_APP1_256MB_BASE); 240 bus_space_write_2(sc->sc_memt, sc->sc_reg_ioh, V360_LB_MAP1, 241 IFPGA_PCI_APP1_256MB_MAP); 242 bus_space_write_4(sc->sc_memt, sc->sc_reg_ioh, V360_LB_BASE0, 243 IFPGA_PCI_APP0_256MB_BASE); 244 #ifdef PCI_DEBUG 245 printf("ifpga_pci_conf_read(pcv=%p tag=0x%08lx reg=0x%02x)=0x%08x\n", 246 pcv, tag, reg, data); 247 #endif 248 return data; 249 } 250 251 void 252 ifpga_pci_conf_write(void *pcv, pcitag_t tag, int reg, pcireg_t data) 253 { 254 struct ifpga_pci_softc *sc = (struct ifpga_pci_softc *)pcv; 255 int bus, device, function; 256 u_int address; 257 258 #ifdef PCI_DEBUG 259 printf("ifpga_pci_conf_write(pcv=%p tag=0x%08lx reg=0x%02x, 0x%08x)\n", 260 pcv, tag, reg, data); 261 #endif 262 263 ifpga_pci_decompose_tag(pcv, tag, &bus, &device, &function); 264 265 /* Reset the appertures so that we can talk to the register space. */ 266 bus_space_write_4(sc->sc_memt, sc->sc_reg_ioh, V360_LB_BASE0, 267 IFPGA_PCI_APP0_512MB_BASE); 268 bus_space_write_4(sc->sc_memt, sc->sc_reg_ioh, V360_LB_BASE1, 269 IFPGA_PCI_APP1_CONF_BASE); 270 271 if (bus == 0) { 272 address = (1 << (device + 11)) | reg; 273 bus_space_write_2(sc->sc_memt, sc->sc_reg_ioh, V360_LB_MAP1, 274 IFPGA_PCI_APP1_CONF_T0_MAP | ((address >> 16) & 0xff00)); 275 276 /* Write the value to the bus... */ 277 bus_space_write_4(sc->sc_iot, sc->sc_conf_ioh, 278 address & 0x00ffffff, data); 279 280 } else { 281 bus_space_write_2(sc->sc_memt, sc->sc_reg_ioh, V360_LB_MAP1, 282 IFPGA_PCI_APP1_CONF_T1_MAP); 283 284 /* Write the value to the bus... */ 285 bus_space_write_4(sc->sc_iot, sc->sc_conf_ioh, tag | reg, 286 data); 287 } 288 /* ... and put the memory spaces back again. */ 289 290 bus_space_write_4(sc->sc_memt, sc->sc_reg_ioh, V360_LB_BASE1, 291 IFPGA_PCI_APP1_256MB_BASE); 292 bus_space_write_2(sc->sc_memt, sc->sc_reg_ioh, V360_LB_MAP1, 293 IFPGA_PCI_APP1_256MB_MAP); 294 bus_space_write_4(sc->sc_memt, sc->sc_reg_ioh, V360_LB_BASE0, 295 IFPGA_PCI_APP0_256MB_BASE); 296 } 297 298 int 299 ifpga_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) 300 { 301 int line = pa->pa_intrline; 302 303 #ifdef PCI_DEBUG 304 int pin = pa->pa_intrpin; 305 void *pcv = pa->pa_pc; 306 pcitag_t intrtag = pa->pa_intrtag; 307 int bus, device, function; 308 309 ifpga_pci_decompose_tag(pcv, intrtag, &bus, &device, &function); 310 printf("ifpga_pci_intr_map: pcv=%p, tag=%08lx pin=%d line=%d " 311 "dev=%d\n", pcv, intrtag, pin, line, device); 312 #endif 313 314 315 #ifdef PCI_DEBUG 316 printf("pin %d, line %d mapped to int %d\n", pin, line, line); 317 #endif 318 319 *ihp = line; 320 return 0; 321 } 322 323 const char * 324 ifpga_pci_intr_string(void *pcv, pci_intr_handle_t ih) 325 { 326 static char irqstr[12]; /* 6 + 1 + NULL + sanity */ 327 328 #ifdef PCI_DEBUG 329 printf("ifpga_pci_intr_string(pcv=%p, ih=0x%lx)\n", pcv, ih); 330 #endif 331 if (ih == 0) 332 panic("ifpga_pci_intr_string: bogus handle 0x%lx", ih); 333 334 sprintf(irqstr, "pciint%ld", ih - IFPGA_INTRNUM_PCIINT0); 335 return irqstr; 336 } 337 338 const struct evcnt * 339 ifpga_pci_intr_evcnt(void *pcv, pci_intr_handle_t ih) 340 { 341 342 /* XXX for now, no evcnt parent reported */ 343 return NULL; 344 } 345 346 void * 347 ifpga_pci_intr_establish(void *pcv, pci_intr_handle_t ih, int level, 348 int (*func) (void *), void *arg) 349 { 350 void *intr; 351 int length; 352 353 #ifdef PCI_DEBUG 354 printf("ifpga_pci_intr_establish(pcv=%p, ih=0x%lx, level=%d, " 355 "func=%p, arg=%p)\n", pcv, ih, level, func, arg); 356 #endif 357 358 /* Copy the interrupt string to a private buffer */ 359 length = strlen(ifpga_pci_intr_string(pcv, ih)); 360 intr = ifpga_intr_establish(ih, level, func, arg); 361 362 return intr; 363 } 364 365 void 366 ifpga_pci_intr_disestablish(void *pcv, void *cookie) 367 { 368 #ifdef PCI_DEBUG 369 printf("ifpga_pci_intr_disestablish(pcv=%p, cookie=%p)\n", 370 pcv, cookie); 371 #endif 372 /* XXXX Need to free the string */ 373 374 ifpga_intr_disestablish(cookie); 375 } 376