1 /* $NetBSD: mace.c,v 1.18 2011/08/18 03:25:34 macallan Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Christopher Sekiya 5 * Copyright (c) 2002,2003 Rafal K. Boni 6 * Copyright (c) 2000 Soren S. Jorvang 7 * All rights reserved. 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the 20 * NetBSD Project. See http://www.NetBSD.org/ for 21 * information about NetBSD. 22 * 4. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 /* 38 * O2 MACE 39 * 40 * The MACE is weird -- although it is a 32-bit device, writes only seem to 41 * work properly if they are 64-bit-at-once writes (at least, out in ISA 42 * space and probably MEC space -- the PCI stuff seems to be okay with _4). 43 * Therefore, the _8* routines are used even though the top 32 bits are 44 * thrown away. 45 */ 46 47 #include <sys/cdefs.h> 48 __KERNEL_RCSID(0, "$NetBSD: mace.c,v 1.18 2011/08/18 03:25:34 macallan Exp $"); 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/device.h> 53 #include <sys/callout.h> 54 #include <sys/mbuf.h> 55 #include <sys/malloc.h> 56 #include <sys/kernel.h> 57 #include <sys/socket.h> 58 #include <sys/ioctl.h> 59 #include <sys/errno.h> 60 #include <sys/syslog.h> 61 62 #include <uvm/uvm_extern.h> 63 64 #define _SGIMIPS_BUS_DMA_PRIVATE 65 #include <sys/bus.h> 66 #include <machine/cpu.h> 67 #include <machine/locore.h> 68 #include <machine/autoconf.h> 69 #include <machine/machtype.h> 70 71 #include <sgimips/mace/macevar.h> 72 #include <sgimips/mace/macereg.h> 73 #include <sgimips/dev/crimevar.h> 74 #include <sgimips/dev/crimereg.h> 75 76 #include "locators.h" 77 78 #define MACE_NINTR 32 /* actually only 8, but interrupts are shared */ 79 80 struct { 81 unsigned int irq; 82 unsigned int intrmask; 83 int (*func)(void *); 84 void *arg; 85 struct evcnt evcnt; 86 char evname[32]; 87 } maceintrtab[MACE_NINTR]; 88 89 struct mace_softc { 90 device_t sc_dev; 91 92 bus_space_tag_t iot; 93 bus_space_handle_t ioh; 94 bus_dma_tag_t dmat; /* 32KB ring buffers, 4KB segments, for ISA */ 95 int nsegs; 96 bus_dma_segment_t seg; 97 bus_dmamap_t map; 98 99 void *isa_ringbuffer; 100 }; 101 102 static int mace_match(struct device *, struct cfdata *, void *); 103 static void mace_attach(struct device *, struct device *, void *); 104 static int mace_print(void *, const char *); 105 static int mace_search(struct device *, struct cfdata *, 106 const int *, void *); 107 108 CFATTACH_DECL_NEW(mace, sizeof(struct mace_softc), 109 mace_match, mace_attach, NULL, NULL); 110 111 #if defined(BLINK) 112 static callout_t mace_blink_ch; 113 static void mace_blink(void *); 114 #endif 115 116 static int 117 mace_match(device_t parent, struct cfdata *match, void *aux) 118 { 119 120 /* 121 * The MACE is in the O2. 122 */ 123 if (mach_type == MACH_SGI_IP32) 124 return 1; 125 126 return 0; 127 } 128 129 static void 130 mace_attach(device_t parent, device_t self, void *aux) 131 { 132 struct mace_softc *sc = device_private(self); 133 struct mainbus_attach_args *ma = aux; 134 uint32_t scratch; 135 136 sc->sc_dev = self; 137 #ifdef BLINK 138 callout_init(&mace_blink_ch, 0); 139 #endif 140 141 sc->iot = SGIMIPS_BUS_SPACE_MACE; 142 sc->dmat = &sgimips_default_bus_dma_tag; 143 144 if (bus_space_map(sc->iot, ma->ma_addr, 0, 145 BUS_SPACE_MAP_LINEAR, &sc->ioh)) 146 panic("mace_attach: could not allocate memory\n"); 147 148 aprint_normal("\n"); 149 150 aprint_debug("%s: isa sts %#"PRIx64"\n", self->dv_xname, 151 bus_space_read_8(sc->iot, sc->ioh, MACE_ISA_INT_STATUS)); 152 aprint_debug("%s: isa msk %#"PRIx64"\n", self->dv_xname, 153 bus_space_read_8(sc->iot, sc->ioh, MACE_ISA_INT_MASK)); 154 155 /* 156 * Turn on most ISA interrupts. These are actually masked and 157 * registered via the CRIME, as the MACE ISA interrupt mask is 158 * really whacky and nigh on impossible to map to a sane autoconfig 159 * scheme. We do, however, turn off the count/compare timer and RTC 160 * interrupts as they are unused and conflict with the PS/2 161 * keyboard and mouse interrupts. 162 */ 163 164 bus_space_write_8(sc->iot, sc->ioh, MACE_ISA_INT_MASK, 0xffff0aff); 165 bus_space_write_8(sc->iot, sc->ioh, MACE_ISA_INT_STATUS, 0); 166 167 /* set up LED for solid green or blink, if that's your fancy */ 168 scratch = bus_space_read_8(sc->iot, sc->ioh, MACE_ISA_FLASH_NIC_REG); 169 scratch |= MACE_ISA_LED_RED; 170 scratch &= ~(MACE_ISA_LED_GREEN); 171 bus_space_write_8(sc->iot, sc->ioh, MACE_ISA_FLASH_NIC_REG, scratch); 172 173 #if defined(BLINK) 174 mace_blink(sc); 175 #endif 176 177 /* Initialize the maceintr elements to sane values */ 178 for (scratch = 0; scratch < MACE_NINTR; scratch++) { 179 maceintrtab[scratch].func = NULL; 180 maceintrtab[scratch].irq = 0; 181 } 182 183 config_search_ia(mace_search, self, "mace", NULL); 184 } 185 186 187 static int 188 mace_print(void *aux, const char *pnp) 189 { 190 struct mace_attach_args *maa = aux; 191 192 if (pnp != 0) 193 return QUIET; 194 195 if (maa->maa_offset != MACECF_OFFSET_DEFAULT) 196 aprint_normal(" offset 0x%lx", maa->maa_offset); 197 if (maa->maa_intr != MACECF_INTR_DEFAULT) 198 aprint_normal(" intr %d", maa->maa_intr); 199 if (maa->maa_offset != MACECF_INTRMASK_DEFAULT) 200 aprint_normal(" intrmask 0x%x", maa->maa_intrmask); 201 202 return UNCONF; 203 } 204 205 static int 206 mace_search(device_t parent, struct cfdata *cf, 207 const int *ldesc, void *aux) 208 { 209 struct mace_softc *sc = device_private(parent); 210 struct mace_attach_args maa; 211 int tryagain; 212 213 do { 214 maa.maa_offset = cf->cf_loc[MACECF_OFFSET]; 215 maa.maa_intr = cf->cf_loc[MACECF_INTR]; 216 maa.maa_intrmask = cf->cf_loc[MACECF_INTRMASK]; 217 maa.maa_st = SGIMIPS_BUS_SPACE_MACE; 218 maa.maa_sh = sc->ioh; /* XXX */ 219 maa.maa_dmat = &sgimips_default_bus_dma_tag; 220 maa.isa_ringbuffer = sc->isa_ringbuffer; 221 222 tryagain = 0; 223 if (config_match(parent, cf, &maa) > 0) { 224 config_attach(parent, cf, &maa, mace_print); 225 tryagain = (cf->cf_fstate == FSTATE_STAR); 226 } 227 228 } while (tryagain); 229 230 return 0; 231 } 232 233 void * 234 mace_intr_establish(int intr, int level, int (*func)(void *), void *arg) 235 { 236 int i; 237 238 if (intr < 0 || intr >= 16) 239 panic("invalid interrupt number"); 240 241 for (i = 0; i < MACE_NINTR; i++) 242 if (maceintrtab[i].func == NULL) { 243 maceintrtab[i].func = func; 244 maceintrtab[i].arg = arg; 245 maceintrtab[i].irq = (1 << intr); 246 maceintrtab[i].intrmask = level; 247 snprintf(maceintrtab[i].evname, 248 sizeof(maceintrtab[i].evname), 249 "intr %d level 0x%x", intr, level); 250 evcnt_attach_dynamic(&maceintrtab[i].evcnt, 251 EVCNT_TYPE_INTR, NULL, 252 "mace", maceintrtab[i].evname); 253 break; 254 } 255 256 crime_intr_mask(intr); 257 aprint_debug("mace: established interrupt %d (level %x)\n", 258 intr, level); 259 return (void *)&maceintrtab[i]; 260 } 261 262 void 263 mace_intr_disestablish(void *cookie) 264 { 265 int intr = -1, level = 0, irq = 0, i; 266 267 for (i = 0; i < MACE_NINTR; i++) 268 if (&maceintrtab[i] == cookie) { 269 evcnt_detach(&maceintrtab[i].evcnt); 270 for (intr = 0; 271 maceintrtab[i].irq == (1 << intr); intr++); 272 level = maceintrtab[i].intrmask; 273 irq = maceintrtab[i].irq; 274 275 maceintrtab[i].irq = 0; 276 maceintrtab[i].intrmask = 0; 277 maceintrtab[i].func = NULL; 278 maceintrtab[i].arg = NULL; 279 memset(&maceintrtab[i].evcnt, 0, sizeof (struct evcnt)); 280 memset(&maceintrtab[i].evname, 0, 281 sizeof (maceintrtab[i].evname)); 282 break; 283 } 284 if (intr == -1) 285 panic("mace: lost maceintrtab"); 286 287 /* do not do an unmask when irq is shared. */ 288 for (i = 0; i < MACE_NINTR; i++) 289 if (&maceintrtab[i].func != NULL && maceintrtab[i].irq == irq) 290 break; 291 if (i == MACE_NINTR) 292 crime_intr_unmask(intr); 293 aprint_debug("mace: disestablished interrupt %d (level %x)\n", 294 intr, level); 295 } 296 297 void 298 mace_intr(int irqs) 299 { 300 uint64_t isa_irq, isa_mask; 301 int i; 302 303 /* irq 4 is the ISA cascade interrupt. Must handle with care. */ 304 if (irqs & (1 << 4)) { 305 isa_mask = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1(MACE_BASE 306 + MACE_ISA_INT_MASK)); 307 isa_irq = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1(MACE_BASE 308 + MACE_ISA_INT_STATUS)); 309 for (i = 0; i < MACE_NINTR; i++) { 310 if ((maceintrtab[i].irq == (1 << 4)) && 311 (isa_irq & maceintrtab[i].intrmask)) { 312 (maceintrtab[i].func)(maceintrtab[i].arg); 313 maceintrtab[i].evcnt.ev_count++; 314 } 315 } 316 irqs &= ~(1 << 4); 317 } 318 319 for (i = 0; i < MACE_NINTR; i++) 320 if ((irqs & maceintrtab[i].irq)) { 321 (maceintrtab[i].func)(maceintrtab[i].arg); 322 maceintrtab[i].evcnt.ev_count++; 323 } 324 } 325 326 #if defined(BLINK) 327 static void 328 mace_blink(void *self) 329 { 330 struct mace_softc *sc = (struct mace_softc *) self; 331 register int s; 332 int value; 333 334 s = splhigh(); 335 value = bus_space_read_8(sc->iot, sc->ioh, MACE_ISA_FLASH_NIC_REG); 336 value ^= MACE_ISA_LED_GREEN; 337 bus_space_write_8(sc->iot, sc->ioh, MACE_ISA_FLASH_NIC_REG, value); 338 splx(s); 339 /* 340 * Blink rate is: 341 * full cycle every second if completely idle (loadav = 0) 342 * full cycle every 2 seconds if loadav = 1 343 * full cycle every 3 seconds if loadav = 2 344 * etc. 345 */ 346 s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 1)); 347 callout_reset(&mace_blink_ch, s, mace_blink, sc); 348 349 } 350 #endif 351