1 /* $NetBSD: hcsc.c,v 1.20 2009/10/18 18:14:00 snj Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Ben Harris 5 * Copyright (c) 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Mark Brinicombe of Causality Limited. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 /* 33 * Copyright (c) 1996, 1997 Matthias Pfaller. 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 /* 58 * HCCS 8-bit SCSI driver using the generic NCR5380 driver 59 * 60 * Andy Armstrong gives some details of the HCCS SCSI cards at 61 * <URL:http://www.armlinux.org/~webmail/linux-arm/1997-08/msg00042.html>. 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: hcsc.c,v 1.20 2009/10/18 18:14:00 snj Exp $"); 66 67 #include <sys/param.h> 68 69 #include <sys/systm.h> 70 #include <sys/kernel.h> 71 #include <sys/device.h> 72 #include <sys/buf.h> 73 #include <dev/scsipi/scsi_all.h> 74 #include <dev/scsipi/scsipi_all.h> 75 #include <dev/scsipi/scsiconf.h> 76 77 #include <dev/ic/ncr5380reg.h> 78 #include <dev/ic/ncr5380var.h> 79 80 #include <machine/bootconfig.h> 81 82 #include <dev/podulebus/podulebus.h> 83 #include <dev/podulebus/podules.h> 84 #include <dev/podulebus/powerromreg.h> 85 86 #include <dev/podulebus/hcscreg.h> 87 88 int hcsc_match(device_t, cfdata_t, void *); 89 void hcsc_attach(device_t, device_t, void *); 90 91 static int hcsc_pdma_in(struct ncr5380_softc *, int, int, uint8_t *); 92 static int hcsc_pdma_out(struct ncr5380_softc *, int, int, uint8_t *); 93 94 95 /* 96 * HCCS 8-bit SCSI softc structure. 97 * 98 * Contains the generic ncr5380 device node, podule information and 99 * global information required by the driver. 100 */ 101 102 struct hcsc_softc { 103 struct ncr5380_softc sc_ncr5380; 104 bus_space_tag_t sc_pdmat; 105 bus_space_handle_t sc_pdmah; 106 void *sc_ih; 107 struct evcnt sc_intrcnt; 108 }; 109 110 CFATTACH_DECL_NEW(hcsc, sizeof(struct hcsc_softc), 111 hcsc_match, hcsc_attach, NULL, NULL); 112 113 /* 114 * Card probe function 115 * 116 * Just match the manufacturer and podule ID's 117 */ 118 119 int 120 hcsc_match(device_t parent, cfdata_t cf, void *aux) 121 { 122 struct podulebus_attach_args *pa = aux; 123 124 /* Normal ROM */ 125 if (pa->pa_product == PODULE_HCCS_IDESCSI && 126 strncmp(pa->pa_descr, "SCSI", 4) == 0) 127 return 1; 128 /* PowerROM */ 129 if (pa->pa_product == PODULE_ALSYSTEMS_SCSI && 130 podulebus_initloader(pa) == 0 && 131 podloader_callloader(pa, 0, 0) == PRID_HCCS_SCSI1) 132 return 1; 133 return 0; 134 } 135 136 /* 137 * Card attach function 138 * 139 */ 140 141 void 142 hcsc_attach(device_t parent, device_t self, void *aux) 143 { 144 struct hcsc_softc *sc = device_private(self); 145 struct ncr5380_softc *ncr_sc = &sc->sc_ncr5380; 146 struct podulebus_attach_args *pa = aux; 147 #ifndef NCR5380_USE_BUS_SPACE 148 uint8_t *iobase; 149 #endif 150 char hi_option[sizeof(self->dv_xname) + 8]; 151 152 ncr_sc->sc_dev = self; 153 ncr_sc->sc_min_dma_len = 0; 154 ncr_sc->sc_no_disconnect = 0; 155 ncr_sc->sc_parity_disable = 0; 156 157 ncr_sc->sc_dma_alloc = NULL; 158 ncr_sc->sc_dma_free = NULL; 159 ncr_sc->sc_dma_poll = NULL; 160 ncr_sc->sc_dma_setup = NULL; 161 ncr_sc->sc_dma_start = NULL; 162 ncr_sc->sc_dma_eop = NULL; 163 ncr_sc->sc_dma_stop = NULL; 164 ncr_sc->sc_intr_on = NULL; 165 ncr_sc->sc_intr_off = NULL; 166 167 #ifdef NCR5380_USE_BUS_SPACE 168 ncr_sc->sc_regt = pa->pa_fast_t; 169 bus_space_map(ncr_sc->sc_regt, 170 pa->pa_fast_base + HCSC_DP8490_OFFSET, 8, 0, 171 &ncr_sc->sc_regh); 172 ncr_sc->sci_r0 = 0; 173 ncr_sc->sci_r1 = 1; 174 ncr_sc->sci_r2 = 2; 175 ncr_sc->sci_r3 = 3; 176 ncr_sc->sci_r4 = 4; 177 ncr_sc->sci_r5 = 5; 178 ncr_sc->sci_r6 = 6; 179 ncr_sc->sci_r7 = 7; 180 #else 181 iobase = (u_char *)pa->pa_fast_base + HCSC_DP8490_OFFSET; 182 ncr_sc->sci_r0 = iobase + 0; 183 ncr_sc->sci_r1 = iobase + 4; 184 ncr_sc->sci_r2 = iobase + 8; 185 ncr_sc->sci_r3 = iobase + 12; 186 ncr_sc->sci_r4 = iobase + 16; 187 ncr_sc->sci_r5 = iobase + 20; 188 ncr_sc->sci_r6 = iobase + 24; 189 ncr_sc->sci_r7 = iobase + 28; 190 #endif 191 sc->sc_pdmat = pa->pa_mod_t; 192 bus_space_map(sc->sc_pdmat, pa->pa_mod_base + HCSC_PDMA_OFFSET, 1, 0, 193 &sc->sc_pdmah); 194 195 ncr_sc->sc_rev = NCR_VARIANT_DP8490; 196 197 ncr_sc->sc_pio_in = hcsc_pdma_in; 198 ncr_sc->sc_pio_out = hcsc_pdma_out; 199 200 /* Provide an override for the host id */ 201 ncr_sc->sc_channel.chan_id = 7; 202 snprintf(hi_option, sizeof(hi_option), "%s.hostid", 203 device_xname(self)); 204 (void)get_bootconf_option(boot_args, hi_option, 205 BOOTOPT_TYPE_INT, &ncr_sc->sc_channel.chan_id); 206 ncr_sc->sc_adapter.adapt_minphys = minphys; 207 208 aprint_normal(": host ID %d\n", ncr_sc->sc_channel.chan_id); 209 210 evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 211 device_xname(self), "intr"); 212 sc->sc_ih = podulebus_irq_establish(pa->pa_ih, IPL_BIO, ncr5380_intr, 213 sc, &sc->sc_intrcnt); 214 215 ncr5380_attach(ncr_sc); 216 } 217 218 #ifndef HCSC_TSIZE_OUT 219 #define HCSC_TSIZE_OUT 512 220 #endif 221 222 #ifndef HCSC_TSIZE_IN 223 #define HCSC_TSIZE_IN 512 224 #endif 225 226 #define TIMEOUT 1000000 227 228 static inline int 229 hcsc_ready(struct ncr5380_softc *sc) 230 { 231 int i; 232 233 for (i = TIMEOUT; i > 0; i--) { 234 if ((NCR5380_READ(sc,sci_csr) & 235 (SCI_CSR_DREQ | SCI_CSR_PHASE_MATCH)) == 236 (SCI_CSR_DREQ | SCI_CSR_PHASE_MATCH)) 237 return 1; 238 239 if ((NCR5380_READ(sc, sci_csr) & SCI_CSR_PHASE_MATCH) == 0 || 240 SCI_BUSY(sc) == 0) 241 return 0; 242 } 243 printf("%s: ready timeout\n", device_xname(sc->sc_dev)); 244 return 0; 245 } 246 247 248 249 /* Return zero on success. */ 250 static inline void hcsc_wait_not_req(struct ncr5380_softc *sc) 251 { 252 int timo; 253 254 for (timo = TIMEOUT; timo; timo--) { 255 if ((NCR5380_READ(sc, sci_bus_csr) & SCI_BUS_REQ) == 0 || 256 (NCR5380_READ(sc, sci_csr) & SCI_CSR_PHASE_MATCH) == 0 || 257 SCI_BUSY(sc) == 0) { 258 return; 259 } 260 } 261 printf("%s: pdma not_req timeout\n", device_xname(sc->sc_dev)); 262 } 263 264 static int 265 hcsc_pdma_in(struct ncr5380_softc *ncr_sc, int phase, int datalen, 266 uint8_t *data) 267 { 268 struct hcsc_softc *sc = (struct hcsc_softc *)ncr_sc; 269 bus_space_tag_t pdmat = sc->sc_pdmat; 270 bus_space_handle_t pdmah = sc->sc_pdmah; 271 int s, resid, len; 272 273 s = splbio(); 274 275 NCR5380_WRITE(ncr_sc, sci_mode, 276 NCR5380_READ(ncr_sc, sci_mode) | SCI_MODE_DMA); 277 NCR5380_WRITE(ncr_sc, sci_irecv, 0); 278 279 resid = datalen; 280 while (resid > 0) { 281 len = min(resid, HCSC_TSIZE_IN); 282 if (hcsc_ready(ncr_sc) == 0) 283 goto interrupt; 284 bus_space_read_multi_1(pdmat, pdmah, 0, data, len); 285 data += len; 286 resid -= len; 287 } 288 289 hcsc_wait_not_req(ncr_sc); 290 291 interrupt: 292 SCI_CLR_INTR(ncr_sc); 293 NCR5380_WRITE(ncr_sc, sci_mode, 294 NCR5380_READ(ncr_sc, sci_mode) & ~SCI_MODE_DMA); 295 splx(s); 296 return datalen - resid; 297 } 298 299 static int 300 hcsc_pdma_out(struct ncr5380_softc *ncr_sc, int phase, int datalen, 301 uint8_t *data) 302 { 303 struct hcsc_softc *sc = (struct hcsc_softc *)ncr_sc; 304 bus_space_tag_t pdmat = sc->sc_pdmat; 305 bus_space_handle_t pdmah = sc->sc_pdmah; 306 int i, s, icmd, resid; 307 308 s = splbio(); 309 icmd = NCR5380_READ(ncr_sc, sci_icmd) & SCI_ICMD_RMASK; 310 NCR5380_WRITE(ncr_sc, sci_icmd, icmd | SCI_ICMD_DATA); 311 NCR5380_WRITE(ncr_sc, sci_mode, 312 NCR5380_READ(ncr_sc, sci_mode) | SCI_MODE_DMA); 313 NCR5380_WRITE(ncr_sc, sci_dma_send, 0); 314 315 resid = datalen; 316 if (hcsc_ready(ncr_sc) == 0) 317 goto interrupt; 318 319 if (resid > HCSC_TSIZE_OUT) { 320 /* 321 * Because of the chips DMA prefetch, phase changes 322 * etc, won't be detected until we have written at 323 * least one byte more. We pre-write 4 bytes so 324 * subsequent transfers will be aligned to a 4 byte 325 * boundary. Assuming disconects will only occur on 326 * block boundaries, we then correct for the pre-write 327 * when and if we get a phase change. If the chip had 328 * DMA byte counting hardware, the assumption would not 329 * be necessary. 330 */ 331 bus_space_write_multi_1(pdmat, pdmah, 0, data, 4); 332 data += 4; 333 resid -= 4; 334 335 for (; resid >= HCSC_TSIZE_OUT; resid -= HCSC_TSIZE_OUT) { 336 if (hcsc_ready(ncr_sc) == 0) { 337 resid += 4; /* Overshot */ 338 goto interrupt; 339 } 340 bus_space_write_multi_1(pdmat, pdmah, 0, data, 341 HCSC_TSIZE_OUT); 342 data += HCSC_TSIZE_OUT; 343 } 344 if (hcsc_ready(ncr_sc) == 0) { 345 resid += 4; /* Overshot */ 346 goto interrupt; 347 } 348 } 349 350 if (resid) { 351 bus_space_write_multi_1(pdmat, pdmah, 0, data, resid); 352 resid = 0; 353 } 354 for (i = TIMEOUT; i > 0; i--) { 355 if ((NCR5380_READ(ncr_sc, sci_csr) 356 & (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) 357 != SCI_CSR_DREQ) 358 break; 359 } 360 if (i != 0) 361 bus_space_write_1(pdmat, pdmah, 0, 0); 362 else 363 printf("%s: timeout waiting for final SCI_DSR_DREQ.\n", 364 device_xname(ncr_sc->sc_dev)); 365 366 hcsc_wait_not_req(ncr_sc); 367 interrupt: 368 SCI_CLR_INTR(ncr_sc); 369 NCR5380_WRITE(ncr_sc, sci_mode, 370 NCR5380_READ(ncr_sc, sci_mode) & ~SCI_MODE_DMA); 371 NCR5380_WRITE(ncr_sc, sci_icmd, icmd); 372 splx(s); 373 return datalen - resid; 374 } 375