1 /* $NetBSD: arpci.c,v 1.2 2011/07/10 23:13:22 matt Exp $ */ 2 /*- 3 * Copyright (c) 2011 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Matt Thomas of 3am Software Foundry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 33 __KERNEL_RCSID(0, "$NetBSD: arpci.c,v 1.2 2011/07/10 23:13:22 matt Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/device.h> 38 39 #include <dev/pci/pcivar.h> 40 41 #include <mips/atheros/include/arbusvar.h> 42 #include <mips/atheros/include/ar9344reg.h> 43 44 #define PCI_CMD_CFG_READ 0xa 45 #define PCI_CMD_CFG_WRITE 0xb 46 47 struct arpci_softc { 48 device_t sc_dev; 49 bus_dma_tag_t sc_dmat; 50 bus_space_tag_t sc_bst; 51 bus_space_handle_t sc_bsh; 52 struct mips_bus_space sc_memt; 53 struct mips_pci_chipset sc_pc; 54 bool sc_pcie; 55 u_int sc_pba_flags; 56 }; 57 58 static void arpci_bus_mem_init(bus_space_tag_t, void *); 59 60 static void 61 arpci_attach_hook(device_t parent, device_t self, 62 struct pcibus_attach_args *pba) 63 { 64 } 65 66 static int 67 arpci_bus_maxdevs(void *v, int busno) 68 { 69 struct arpci_softc * const sc = v; 70 71 if (busno == 0) 72 return (sc->sc_pcie ? 1 : 22); 73 74 return 32; 75 } 76 77 static pcitag_t 78 arpci_make_tag(void *v, int bus, int dev, int func) 79 { 80 if (bus == 0 && dev == 0) { 81 /* 82 * Local access 83 */ 84 return (func << 8); 85 } 86 87 if (bus == 0 && dev < 21) { 88 /* 89 * Type 0 can only access 21 (32 - 11) devices starting at * device 0 (0 is needed for inbound transactions). 90 * AD[11:32] encodes the idsel for the transaction 91 * (only one bit can be set). 92 * AD[8:11] contains function 93 * AD[2:7] contains the register offset. 94 * AD[0:1] must be zero. 95 */ 96 return (1 << (dev + 11)) | (func << 8); 97 } 98 99 /* 100 * Type 1 Confugration Transaction. 101 */ 102 return (bus << 16) | (dev << 11) | (func << 8) | 1; 103 } 104 105 static void 106 arpci_decompose_tag(void *v, pcitag_t tag, int *busp, int *devp, int *funcp) 107 { 108 if (tag & 1) { 109 if (busp) 110 *busp = (tag >> 16) & 255; 111 if (devp) 112 *devp = (tag >> 11) & 31; 113 } else { 114 if (busp) 115 *busp = 0; 116 if (devp) { 117 if (tag & ~0x7ff) { 118 *devp = ffs(tag >> 11) - 1; 119 } else { 120 *devp = 0; 121 } 122 } 123 } 124 if (funcp) 125 *funcp = (tag >> 8) & 7; 126 } 127 128 static pcireg_t 129 arpci_conf_read(void *v, pcitag_t tag, int reg) 130 { 131 struct arpci_softc * const sc = v; 132 pcireg_t rv = 0xffffffff; 133 134 if ((tag & 0x00ff0001) == 1) { 135 KASSERT(((tag >> 11) & 31) > 20); 136 /* 137 * This was a type 0 transaction for a device > 20 which 138 * we can't support. 139 */ 140 return rv; 141 } 142 143 tag |= reg & -4; 144 145 #if 0 146 bus_space_read_4(sc->sc_bst, sc->sc_bsh, AR7100_PCI_ERROR); 147 bus_space_write_4(sc->sc_bst, sc->sc_bsh, AR7100_PCI_ERROR, 148 bus_space_read_4(sc->sc_bst, sc->sc_bsh, AR7100_PCI_ERROR) & 3); 149 #endif 150 151 bus_space_handle_t addr = sc->sc_bsh; 152 if ((tag & ~0x7fe) == 0) { 153 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 154 AR7100_PCI_LCL_CFG_CMD, AR7100_PCI_LCL_CFG_CMD_READ | tag); 155 addr += AR7100_PCI_LCL_CFG_RDATA; 156 printf("%s: tag %#lx: ", __func__, tag); 157 } else { 158 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 159 AR7100_PCI_CFG_ADDR, tag); 160 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 161 AR7100_PCI_CFG_CMD, PCI_CMD_CFG_READ); 162 addr += AR7100_PCI_CFG_RDATA; 163 printf("%s: AD[0:31] 0x%08lx: ", __func__, tag); 164 } 165 166 rv = kfetch_32((void *)addr, 0xffffffff); 167 printf("%#x\n", rv); 168 169 return rv; 170 } 171 172 static void 173 arpci_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data) 174 { 175 struct arpci_softc * const sc = v; 176 177 if ((tag & 0x00ff0001) == 1) { 178 KASSERT(((tag >> 11) & 31) > 20); 179 /* 180 * This was a type 0 transaction for a device > 20 which 181 * we can't support. 182 */ 183 return; 184 } 185 186 tag |= reg & -4; 187 188 if ((tag & ~0x7fe) == 0) { 189 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 190 AR7100_PCI_LCL_CFG_CMD, AR7100_PCI_LCL_CFG_CMD_WRITE | tag); 191 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 192 AR7100_PCI_LCL_CFG_WDATA, data); 193 } else { 194 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 195 AR7100_PCI_CFG_ADDR, tag); 196 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 197 AR7100_PCI_CFG_CMD, PCI_CMD_CFG_WRITE); 198 bus_space_write_4(sc->sc_bst, sc->sc_bsh, 199 AR7100_PCI_CFG_WDATA, data); 200 } 201 } 202 203 static int 204 arpci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 205 { 206 return EINVAL; 207 } 208 209 static const char * 210 arpci_intr_string(void *v, pci_intr_handle_t ih) 211 { 212 return NULL; 213 } 214 215 static const struct evcnt * 216 arpci_intr_evcnt(void *v, pci_intr_handle_t ih) 217 { 218 return NULL; 219 } 220 221 static void * 222 arpci_intr_establish(void *v, pci_intr_handle_t ih, 223 int ipl, int (*func)(void *), void *arg) 224 { 225 return NULL; 226 } 227 228 static void 229 arpci_intr_disestablish(void *v, void *cookie) 230 { 231 } 232 233 static void 234 arpci_conf_interrupt(void *v, int bus, int dev, int func, int swiz, int *ilinep) 235 { 236 } 237 238 static void 239 arpci_chipset_init(struct arpci_softc *sc) 240 { 241 pci_chipset_tag_t pc = &sc->sc_pc; 242 243 pc->pc_conf_v = sc; 244 pc->pc_attach_hook = arpci_attach_hook; 245 pc->pc_bus_maxdevs = arpci_bus_maxdevs; 246 pc->pc_make_tag = arpci_make_tag; 247 pc->pc_decompose_tag = arpci_decompose_tag; 248 pc->pc_conf_read = arpci_conf_read; 249 pc->pc_conf_write = arpci_conf_write; 250 251 pc->pc_intr_v = sc; 252 pc->pc_intr_map = arpci_intr_map; 253 pc->pc_intr_string = arpci_intr_string; 254 pc->pc_intr_evcnt = arpci_intr_evcnt; 255 pc->pc_intr_establish = arpci_intr_establish; 256 pc->pc_intr_disestablish = arpci_intr_disestablish; 257 258 pc->pc_conf_interrupt = arpci_conf_interrupt; 259 260 #ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH 261 //pc->pc_pciide_compat_intr_establish = arpci_pciide_compat_intr_establish; 262 #endif 263 } 264 265 static int 266 arpci_match(device_t parent, cfdata_t cf, void *aux) 267 { 268 struct arbus_attach_args * const aa = aux; 269 bus_space_handle_t bsh; 270 271 if (strcmp(aa->aa_name, cf->cf_name) != 0) 272 return 0; 273 274 if (bus_space_map(aa->aa_bst, aa->aa_addr, aa->aa_size, 0, &bsh)) 275 return 0; 276 277 bus_space_unmap(aa->aa_bst, bsh, aa->aa_size); 278 279 return 1; 280 } 281 282 static void 283 arpci_attach(device_t parent, device_t self, void *aux) 284 { 285 struct arbus_attach_args * const aa = aux; 286 struct arpci_softc * const sc = device_private(self); 287 288 sc->sc_dev = self; 289 sc->sc_bst = aa->aa_bst; 290 sc->sc_dmat = aa->aa_dmat; 291 sc->sc_pcie = (strcmp(device_cfdata(self)->cf_name, "arpcie") == 0); 292 293 if (bus_space_map(aa->aa_bst, aa->aa_addr, aa->aa_size, 0, 294 &sc->sc_bsh)) { 295 aprint_error(": failed to map registers\n"); 296 return; 297 } 298 299 aprint_normal(": PCI%s bus\n", (sc->sc_pcie ? "-Express x1" : "")); 300 arpci_bus_mem_init(&sc->sc_memt, sc); 301 arpci_chipset_init(sc); 302 303 sc->sc_pba_flags |= PCI_FLAGS_MEM_OKAY; 304 305 struct pcibus_attach_args pba; 306 memset(&pba, 0, sizeof(pba)); 307 308 pba.pba_flags = sc->sc_pba_flags; 309 if (pba.pba_flags & PCI_FLAGS_MEM_OKAY) 310 pba.pba_memt = &sc->sc_memt; 311 pba.pba_dmat = aa->aa_dmat; 312 pba.pba_pc = &sc->sc_pc; 313 pba.pba_bus = 0; 314 315 config_found_ia(self, "pcibus", &pba, pcibusprint); 316 } 317 318 CFATTACH_DECL_NEW(arpci, sizeof(struct arpci_softc), 319 arpci_match, arpci_attach, NULL, NULL); 320 CFATTACH_DECL_NEW(arpcie, sizeof(struct arpci_softc), 321 arpci_match, arpci_attach, NULL, NULL); 322 323 #define CHIP arpci 324 #define CHIP_LITTLE_ENDIAN /* defined */ 325 #define CHIP_MEM /* defined */ 326 #define CHIP_EXTENT /* defined */ 327 #define CHIP_EX_MALLOC_SAFE(v) true 328 #define CHIP_W1_BUS_START(v) 0x10000000UL 329 #define CHIP_W1_BUS_END(v) 0x16ffffffUL 330 #define CHIP_W1_SYS_START(v) CHIP_W1_BUS_START(v) 331 #define CHIP_W1_SYS_END(v) CHIP_W1_BUS_END(v) 332 333 #include <mips/mips/bus_space_alignstride_chipdep.c> 334