1 /* $NetBSD: ifpga.c,v 1.23 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 32 /* 33 * Integrator FPGA core logic support. 34 * 35 * The integrator board supports the core logic in an FPGA which is loaded 36 * at POR with a custom design. This code supports the default logic as the 37 * board is shipped. 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: ifpga.c,v 1.23 2009/07/21 16:04:16 dyoung Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/types.h> 45 #include <sys/device.h> 46 #include <sys/systm.h> 47 #include <sys/extent.h> 48 #include <sys/malloc.h> 49 #include <sys/null.h> 50 51 #include <dev/pci/pcivar.h> 52 #include <dev/pci/pciconf.h> 53 54 #include <arm/cpufunc.h> 55 56 #include "opt_pci.h" 57 #include "pci.h" 58 59 #include <evbarm/ifpga/ifpgamem.h> 60 #include <evbarm/ifpga/ifpgavar.h> 61 #include <evbarm/ifpga/ifpgareg.h> 62 #include <evbarm/ifpga/ifpga_pcivar.h> 63 #include <evbarm/dev/v360reg.h> 64 65 #include <evbarm/integrator/int_bus_dma.h> 66 #include "locators.h" 67 68 /* Prototypes */ 69 static int ifpga_match (device_t, cfdata_t, void *); 70 static void ifpga_attach (device_t, device_t, void *); 71 static int ifpga_print (void *, const char *); 72 73 /* Drive and attach structures */ 74 CFATTACH_DECL_NEW(ifpga, sizeof(struct ifpga_softc), 75 ifpga_match, ifpga_attach, NULL, NULL); 76 77 int ifpga_found; 78 79 /* Default UART clock speed (we should make this a boot option). */ 80 int ifpga_uart_clk = IFPGA_UART_CLK; 81 82 #if NPCI > 0 83 /* PCI handles */ 84 extern struct arm32_pci_chipset ifpga_pci_chipset; 85 extern struct arm32_bus_dma_tag ifpga_pci_bus_dma_tag; 86 87 static struct bus_space ifpga_pci_io_tag; 88 static struct bus_space ifpga_pci_mem_tag; 89 #endif /* NPCI > 0 */ 90 91 static struct bus_space ifpga_bs_tag; 92 93 struct ifpga_softc *ifpga_sc; 94 device_t ifpga_dev; 95 96 /* 97 * Print the configuration information for children 98 */ 99 100 static int 101 ifpga_print(void *aux, const char *pnp) 102 { 103 struct ifpga_attach_args *ifa = aux; 104 105 if (ifa->ifa_addr != -1) 106 aprint_normal(" addr 0x%lx", (unsigned long)ifa->ifa_addr); 107 if (ifa->ifa_irq != -1) 108 aprint_normal(" irq %d", ifa->ifa_irq); 109 110 return UNCONF; 111 } 112 113 static int 114 ifpga_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 115 { 116 struct ifpga_softc *sc = device_private(parent); 117 struct ifpga_attach_args ifa; 118 int tryagain; 119 120 do { 121 ifa.ifa_iot = sc->sc_iot; 122 ifa.ifa_addr = cf->cf_iobase; 123 ifa.ifa_irq = cf->cf_irq; 124 ifa.ifa_sc_ioh = sc->sc_sc_ioh; 125 126 tryagain = 0; 127 if (config_match(parent, cf, &ifa) > 0) { 128 config_attach(parent, cf, &ifa, ifpga_print); 129 tryagain = (cf->cf_fstate == FSTATE_STAR); 130 } 131 } while (tryagain); 132 133 return 0; 134 } 135 136 static int 137 ifpga_match(device_t parent, cfdata_t cf, void *aux) 138 { 139 #if 0 140 struct mainbus_attach_args *ma = aux; 141 142 /* Make sure that we're looking for the IFPGA. */ 143 if (strcmp(ma->ma_name, ifpga_md.md_name)) 144 return 0; 145 #endif 146 147 /* We can only have one instance of the IFPGA. */ 148 if (ifpga_found) 149 return 0; 150 151 return 1; 152 } 153 154 static void 155 ifpga_attach(device_t parent, device_t self, void *aux) 156 { 157 struct ifpga_softc *sc = device_private(self); 158 u_int id, sysclk; 159 #if defined(PCI_NETBSD_CONFIGURE) && NPCI > 0 160 struct extent *ioext, *memext, *pmemext; 161 struct ifpga_pci_softc *pci_sc; 162 struct pcibus_attach_args pci_pba; 163 #endif 164 165 ifpga_found = 1; 166 167 /* We want a memory-mapped bus space, since the I/O space is sparse. */ 168 ifpga_create_mem_bs_tag(&ifpga_bs_tag, (void *)IFPGA_IO_BASE); 169 170 #if NPCI > 0 171 /* But the PCI config space is quite large, so we have a linear region 172 for that pre-allocated. */ 173 174 ifpga_create_io_bs_tag(&ifpga_pci_io_tag, (void *)IFPGA_PCI_IO_VBASE); 175 ifpga_create_mem_bs_tag(&ifpga_pci_mem_tag, (void *)0); 176 #endif 177 178 sc->sc_iot = &ifpga_bs_tag; 179 180 ifpga_dev = self; 181 ifpga_sc = sc; 182 183 /* Now map in the IFPGA motherboard registers. */ 184 if (bus_space_map(sc->sc_iot, IFPGA_IO_SC_BASE, IFPGA_IO_SC_SIZE, 0, 185 &sc->sc_sc_ioh)) 186 panic("%s: Cannot map system controller registers", 187 device_xname(self)); 188 189 id = bus_space_read_4(sc->sc_iot, sc->sc_sc_ioh, IFPGA_SC_ID); 190 191 printf(": Build %d, ", (id & IFPGA_SC_ID_BUILD_MASK) >> 192 IFPGA_SC_ID_BUILD_SHIFT); 193 switch (id & IFPGA_SC_ID_REV_MASK) 194 { 195 case IFPGA_SC_ID_REV_A: 196 printf("Rev A, "); 197 break; 198 case IFPGA_SC_ID_REV_B: 199 printf("Rev B, "); 200 break; 201 } 202 203 printf("Manufacturer "); 204 switch (id & IFPGA_SC_ID_MAN_MASK) 205 { 206 case IFPGA_SC_ID_MAN_ARM: 207 printf("ARM Ltd,"); 208 break; 209 default: 210 printf("Unknown,"); 211 break; 212 } 213 214 switch (id & IFPGA_SC_ID_ARCH_MASK) 215 { 216 case IFPGA_SC_ID_ARCH_ASBLE: 217 printf(" ASB, Little-endian,"); 218 break; 219 case IFPGA_SC_ID_ARCH_AHBLE: 220 printf(" AHB, Little-endian,"); 221 break; 222 default: 223 panic(" Unsupported bus"); 224 } 225 226 printf("\n%s: FPGA ", device_xname(self)); 227 228 switch (id & IFPGA_SC_ID_FPGA_MASK) 229 { 230 case IFPGA_SC_ID_FPGA_XC4062: 231 printf("XC4062"); 232 break; 233 case IFPGA_SC_ID_FPGA_XC4085: 234 printf("XC4085"); 235 break; 236 default: 237 printf("unknown"); 238 break; 239 } 240 241 sysclk = bus_space_read_1(sc->sc_iot, sc->sc_sc_ioh, IFPGA_SC_OSC); 242 sysclk &= IFPGA_SC_OSC_S_VDW; 243 sysclk += 8; 244 245 printf(", SYSCLK %d.%02dMHz", sysclk >> 2, (sysclk & 3) * 25); 246 247 /* Map the Interrupt controller */ 248 if (bus_space_map(sc->sc_iot, IFPGA_IO_IRQ_BASE, IFPGA_IO_IRQ_SIZE, 249 BUS_SPACE_MAP_LINEAR, &sc->sc_irq_ioh)) 250 panic("%s: Cannot map irq controller registers", 251 device_xname(self)); 252 253 /* We can write to the IRQ/FIQ controller now. */ 254 ifpga_intr_postinit(); 255 256 /* Map the core module */ 257 if (bus_space_map(sc->sc_iot, IFPGA_IO_CM_BASE, IFPGA_IO_CM_SIZE, 0, 258 &sc->sc_cm_ioh)) { 259 panic("%s: Cannot map core module registers", 260 device_xname(self)); 261 } 262 263 /* Map the timers */ 264 if (bus_space_map(sc->sc_iot, IFPGA_IO_TMR_BASE, IFPGA_IO_TMR_SIZE, 0, 265 &sc->sc_tmr_ioh)) 266 panic("%s: Cannot map timer registers", device_xname(self)); 267 268 printf("\n"); 269 270 #if NPCI > 0 271 pci_sc = malloc(sizeof(struct ifpga_pci_softc), M_DEVBUF, M_WAITOK); 272 pci_sc->sc_iot = &ifpga_pci_io_tag; 273 pci_sc->sc_memt = &ifpga_pci_mem_tag; 274 275 if (bus_space_map(pci_sc->sc_iot, 0, IFPGA_PCI_IO_VSIZE, 0, 276 &pci_sc->sc_io_ioh) 277 || bus_space_map(pci_sc->sc_iot, 278 IFPGA_PCI_CONF_VBASE - IFPGA_PCI_IO_VBASE, IFPGA_PCI_CONF_VSIZE, 0, 279 &pci_sc->sc_conf_ioh) 280 || bus_space_map(pci_sc->sc_memt, IFPGA_V360_REG_BASE, 281 IFPGA_V360_REG_SIZE, 0, &pci_sc->sc_reg_ioh)) 282 panic("%s: Cannot map pci memory", device_xname(self)); 283 284 { 285 pcireg_t id_reg, class_reg; 286 char buf[1000]; 287 288 id_reg = bus_space_read_4(pci_sc->sc_memt, pci_sc->sc_reg_ioh, 289 V360_PCI_VENDOR); 290 class_reg = bus_space_read_4(pci_sc->sc_memt, 291 pci_sc->sc_reg_ioh, V360_PCI_CC_REV); 292 293 pci_devinfo(id_reg, class_reg, 1, buf, sizeof(buf)); 294 printf("%s: %s\n", device_xname(self), buf); 295 } 296 297 #if defined(PCI_NETBSD_CONFIGURE) 298 ioext = extent_create("pciio", 0x00000000, 299 0x00000000 + IFPGA_PCI_IO_VSIZE, M_DEVBUF, NULL, 0, EX_NOWAIT); 300 memext = extent_create("pcimem", IFPGA_PCI_APP0_BASE, 301 IFPGA_PCI_APP0_BASE + IFPGA_PCI_APP0_SIZE, 302 M_DEVBUF, NULL, 0, EX_NOWAIT); 303 pmemext = extent_create("pcipmem", IFPGA_PCI_APP1_BASE, 304 IFPGA_PCI_APP1_BASE + IFPGA_PCI_APP1_SIZE, 305 M_DEVBUF, NULL, 0, EX_NOWAIT); 306 ifpga_pci_chipset.pc_conf_v = (void *)pci_sc; 307 pci_configure_bus(&ifpga_pci_chipset, ioext, memext, pmemext, 0, 308 arm_dcache_align); 309 extent_destroy(pmemext); 310 extent_destroy(memext); 311 extent_destroy(ioext); 312 313 printf("pci_configure_bus done\n"); 314 #endif /* PCI_NETBSD_CONFIGURE */ 315 #endif /* NPCI > 0 */ 316 317 /* Finally, search for children. */ 318 config_search_ia(ifpga_search, self, "ifpga", NULL); 319 320 #if NPCI > 0 321 integrator_pci_dma_init(&ifpga_pci_bus_dma_tag); 322 323 pci_pba.pba_pc = &ifpga_pci_chipset; 324 pci_pba.pba_iot = &ifpga_pci_io_tag; 325 pci_pba.pba_memt = &ifpga_pci_mem_tag; 326 pci_pba.pba_dmat = &ifpga_pci_bus_dma_tag; 327 pci_pba.pba_dmat64 = NULL; 328 pci_pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; 329 pci_pba.pba_bus = 0; 330 pci_pba.pba_bridgetag = NULL; 331 332 config_found_ia(self, "pcibus", &pci_pba, pcibusprint); 333 #endif 334 } 335 336 void 337 ifpga_reset(void) 338 { 339 bus_space_write_1(ifpga_sc->sc_iot, ifpga_sc->sc_sc_ioh, 340 IFPGA_SC_CTRLS, IFPGA_SC_CTRL_SOFTRESET); 341 } 342