ahd_pci.c revision 114618
1/* 2 * FreeBSD, PCI product support functions 3 * 4 * Copyright (c) 1995-2001 Justin T. Gibbs 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 * without modification, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * Alternatively, this software may be distributed under the terms of the 17 * GNU Public License ("GPL"). 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR 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 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahd_pci.c#13 $ 32 * 33 * $FreeBSD: head/sys/dev/aic7xxx/ahd_pci.c 114618 2003-05-03 23:27:57Z gibbs $ 34 */ 35 36#include <dev/aic7xxx/aic79xx_osm.h> 37 38#define AHD_PCI_IOADDR0 PCIR_MAPS /* Primary I/O BAR */ 39#define AHD_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */ 40#define AHD_PCI_IOADDR1 (PCIR_MAPS + 12)/* Secondary I/O BAR */ 41 42static int ahd_pci_probe(device_t dev); 43static int ahd_pci_attach(device_t dev); 44 45static device_method_t ahd_pci_device_methods[] = { 46 /* Device interface */ 47 DEVMETHOD(device_probe, ahd_pci_probe), 48 DEVMETHOD(device_attach, ahd_pci_attach), 49 DEVMETHOD(device_detach, ahd_detach), 50 { 0, 0 } 51}; 52 53static driver_t ahd_pci_driver = { 54 "ahd", 55 ahd_pci_device_methods, 56 sizeof(struct ahd_softc) 57}; 58 59static devclass_t ahd_devclass; 60 61DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, 0, 0); 62DRIVER_MODULE(ahd, cardbus, ahd_pci_driver, ahd_devclass, 0, 0); 63MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1); 64MODULE_VERSION(ahd_pci, 1); 65 66static int 67ahd_pci_probe(device_t dev) 68{ 69 struct ahd_pci_identity *entry; 70 71 entry = ahd_find_pci_device(dev); 72 if (entry != NULL) { 73 device_set_desc(dev, entry->name); 74 return (0); 75 } 76 return (ENXIO); 77} 78 79static int 80ahd_pci_attach(device_t dev) 81{ 82 struct ahd_pci_identity *entry; 83 struct ahd_softc *ahd; 84 char *name; 85 int error; 86 87 entry = ahd_find_pci_device(dev); 88 if (entry == NULL) 89 return (ENXIO); 90 91 /* 92 * Allocate a softc for this card and 93 * set it up for attachment by our 94 * common detect routine. 95 */ 96 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT); 97 if (name == NULL) 98 return (ENOMEM); 99 strcpy(name, device_get_nameunit(dev)); 100 ahd = ahd_alloc(dev, name); 101 if (ahd == NULL) 102 return (ENOMEM); 103 104 ahd_set_unit(ahd, device_get_unit(dev)); 105 106 /* 107 * Should we bother disabling 39Bit addressing 108 * based on installed memory? 109 */ 110 if (sizeof(bus_addr_t) > 4) 111 ahd->flags |= AHD_39BIT_ADDRESSING; 112 113 /* Allocate a dmatag for our SCB DMA maps */ 114 /* XXX Should be a child of the PCI bus dma tag */ 115 error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1, 116 /*boundary*/0, 117 (ahd->flags & AHD_39BIT_ADDRESSING) 118 ? 0x7FFFFFFFFF 119 : BUS_SPACE_MAXADDR_32BIT, 120 /*highaddr*/BUS_SPACE_MAXADDR, 121 /*filter*/NULL, /*filterarg*/NULL, 122 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 123 /*nsegments*/AHD_NSEG, 124 /*maxsegsz*/AHD_MAXTRANSFER_SIZE, 125 /*flags*/0, 126 &ahd->parent_dmat); 127 128 if (error != 0) { 129 printf("ahd_pci_attach: Could not allocate DMA tag " 130 "- error %d\n", error); 131 ahd_free(ahd); 132 return (ENOMEM); 133 } 134 ahd->dev_softc = dev; 135 error = ahd_pci_config(ahd, entry); 136 if (error != 0) { 137 ahd_free(ahd); 138 return (error); 139 } 140 141 ahd_attach(ahd); 142 return (0); 143} 144 145int 146ahd_pci_map_registers(struct ahd_softc *ahd) 147{ 148 struct resource *regs; 149 struct resource *regs2; 150 u_int command; 151 int regs_type; 152 int regs_id; 153 int regs_id2; 154 int allow_memio; 155 156 command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1); 157 regs = NULL; 158 regs2 = NULL; 159 regs_type = 0; 160 regs_id = 0; 161 162 /* Retrieve the per-device 'allow_memio' hint */ 163 if (resource_int_value(device_get_name(ahd->dev_softc), 164 device_get_unit(ahd->dev_softc), 165 "allow_memio", &allow_memio) != 0) { 166 if (bootverbose) 167 device_printf(ahd->dev_softc, 168 "Defaulting to MEMIO on\n"); 169 } 170 171 if ((command & PCIM_CMD_MEMEN) != 0 172 && (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0 173 && allow_memio != 0) { 174 175 regs_type = SYS_RES_MEMORY; 176 regs_id = AHD_PCI_MEMADDR; 177 regs = bus_alloc_resource(ahd->dev_softc, regs_type, 178 ®s_id, 0, ~0, 1, RF_ACTIVE); 179 if (regs != NULL) { 180 int error; 181 182 ahd->tags[0] = rman_get_bustag(regs); 183 ahd->bshs[0] = rman_get_bushandle(regs); 184 ahd->tags[1] = ahd->tags[0]; 185 error = bus_space_subregion(ahd->tags[0], ahd->bshs[0], 186 /*offset*/0x100, 187 /*size*/0x100, 188 &ahd->bshs[1]); 189 /* 190 * Do a quick test to see if memory mapped 191 * I/O is functioning correctly. 192 */ 193 if (error != 0 194 || ahd_pci_test_register_access(ahd) != 0) { 195 device_printf(ahd->dev_softc, 196 "PCI Device %d:%d:%d failed memory " 197 "mapped test. Using PIO.\n", 198 ahd_get_pci_bus(ahd->dev_softc), 199 ahd_get_pci_slot(ahd->dev_softc), 200 ahd_get_pci_function(ahd->dev_softc)); 201 bus_release_resource(ahd->dev_softc, regs_type, 202 regs_id, regs); 203 regs = NULL; 204 } else { 205 command &= ~PCIM_CMD_PORTEN; 206 ahd_pci_write_config(ahd->dev_softc, 207 PCIR_COMMAND, 208 command, /*bytes*/1); 209 } 210 } 211 } 212 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) { 213 regs_type = SYS_RES_IOPORT; 214 regs_id = AHD_PCI_IOADDR0; 215 regs = bus_alloc_resource(ahd->dev_softc, regs_type, 216 ®s_id, 0, ~0, 1, RF_ACTIVE); 217 if (regs == NULL) { 218 device_printf(ahd->dev_softc, 219 "can't allocate register resources\n"); 220 return (ENOMEM); 221 } 222 ahd->tags[0] = rman_get_bustag(regs); 223 ahd->bshs[0] = rman_get_bushandle(regs); 224 225 /* And now the second BAR */ 226 regs_id2 = AHD_PCI_IOADDR1; 227 regs2 = bus_alloc_resource(ahd->dev_softc, regs_type, 228 ®s_id2, 0, ~0, 1, RF_ACTIVE); 229 if (regs2 == NULL) { 230 device_printf(ahd->dev_softc, 231 "can't allocate register resources\n"); 232 return (ENOMEM); 233 } 234 ahd->tags[1] = rman_get_bustag(regs2); 235 ahd->bshs[1] = rman_get_bushandle(regs2); 236 command &= ~PCIM_CMD_MEMEN; 237 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, 238 command, /*bytes*/1); 239 ahd->platform_data->regs_res_type[1] = regs_type; 240 ahd->platform_data->regs_res_id[1] = regs_id2; 241 ahd->platform_data->regs[1] = regs2; 242 } 243 ahd->platform_data->regs_res_type[0] = regs_type; 244 ahd->platform_data->regs_res_id[0] = regs_id; 245 ahd->platform_data->regs[0] = regs; 246 return (0); 247} 248 249int 250ahd_pci_map_int(struct ahd_softc *ahd) 251{ 252 int zero; 253 254 zero = 0; 255 ahd->platform_data->irq = 256 bus_alloc_resource(ahd->dev_softc, SYS_RES_IRQ, &zero, 257 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 258 if (ahd->platform_data->irq == NULL) 259 return (ENOMEM); 260 ahd->platform_data->irq_res_type = SYS_RES_IRQ; 261 return (ahd_map_int(ahd)); 262} 263 264void 265ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state) 266{ 267 uint32_t cap; 268 u_int cap_offset; 269 270 /* 271 * Traverse the capability list looking for 272 * the power management capability. 273 */ 274 cap = 0; 275 cap_offset = ahd_pci_read_config(ahd->dev_softc, 276 PCIR_CAP_PTR, /*bytes*/1); 277 while (cap_offset != 0) { 278 279 cap = ahd_pci_read_config(ahd->dev_softc, 280 cap_offset, /*bytes*/4); 281 if ((cap & 0xFF) == 1 282 && ((cap >> 16) & 0x3) > 0) { 283 uint32_t pm_control; 284 285 pm_control = ahd_pci_read_config(ahd->dev_softc, 286 cap_offset + 4, 287 /*bytes*/2); 288 pm_control &= ~0x3; 289 pm_control |= new_state; 290 ahd_pci_write_config(ahd->dev_softc, 291 cap_offset + 4, 292 pm_control, /*bytes*/2); 293 break; 294 } 295 cap_offset = (cap >> 8) & 0xFF; 296 } 297} 298