kauai.c revision 1.2
1 /* $NetBSD: kauai.c,v 1.2 2003/07/15 02:43:29 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 Tsubai Masanari. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: kauai.c,v 1.2 2003/07/15 02:43:29 lukem Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/device.h> 35 #include <sys/malloc.h> 36 37 #include <uvm/uvm_extern.h> 38 39 #include <machine/bus.h> 40 41 #include <dev/ata/atareg.h> 42 #include <dev/ata/atavar.h> 43 #include <dev/ic/wdcvar.h> 44 45 #include <dev/ofw/openfirm.h> 46 47 #include <dev/pci/pcivar.h> 48 #include <dev/pci/pcireg.h> 49 #include <dev/pci/pcidevs.h> 50 51 #include <macppc/dev/dbdma.h> 52 53 #define WDC_REG_NPORTS 8 54 #define WDC_AUXREG_OFFSET 0x16 55 56 #define PIO_CONFIG_REG (0x200 >> 4) /* PIO and DMA access timing */ 57 #define DMA_CONFIG_REG (0x210 >> 4) /* UDMA access timing */ 58 59 struct kauai_softc { 60 struct wdc_softc sc_wdcdev; 61 struct channel_softc *wdc_chanptr; 62 struct channel_softc wdc_channel; 63 struct channel_queue wdc_queue; 64 dbdma_regmap_t *sc_dmareg; 65 dbdma_command_t *sc_dmacmd; 66 u_int sc_piotiming_r[2]; 67 u_int sc_piotiming_w[2]; 68 u_int sc_dmatiming_r[2]; 69 u_int sc_dmatiming_w[2]; 70 void (*sc_calc_timing)(struct kauai_softc *, int); 71 }; 72 73 int kauai_match __P((struct device *, struct cfdata *, void *)); 74 void kauai_attach __P((struct device *, struct device *, void *)); 75 int kauai_dma_init __P((void *, int, int, void *, size_t, int)); 76 void kauai_dma_start __P((void *, int, int)); 77 int kauai_dma_finish __P((void *, int, int, int)); 78 void kauai_set_modes __P((struct channel_softc *)); 79 static void calc_timing_kauai __P((struct kauai_softc *, int)); 80 static int getnodebypci(pci_chipset_tag_t, pcitag_t); 81 82 CFATTACH_DECL(kauai, sizeof(struct kauai_softc), 83 kauai_match, kauai_attach, NULL, wdcactivate); 84 85 int 86 kauai_match(parent, match, aux) 87 struct device *parent; 88 struct cfdata *match; 89 void *aux; 90 { 91 struct pci_attach_args *pa = aux; 92 93 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE && 94 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_KAUAI) 95 return 5; 96 97 return 0; 98 } 99 100 void 101 kauai_attach(parent, self, aux) 102 struct device *parent, *self; 103 void *aux; 104 { 105 struct kauai_softc *sc = (void *)self; 106 struct pci_attach_args *pa = aux; 107 struct channel_softc *chp = &sc->wdc_channel; 108 pci_intr_handle_t ih; 109 paddr_t regbase, dmabase; 110 int node, reg[5]; 111 112 #ifdef DIAGNOSTIC 113 if ((vaddr_t)sc->sc_dmacmd & 0x0f) { 114 printf(": bad dbdma alignment\n"); 115 return; 116 } 117 #endif 118 119 node = getnodebypci(pa->pa_pc, pa->pa_tag); 120 if (node == 0) { 121 printf(": cannot find gmac node\n"); 122 return; 123 } 124 125 if (OF_getprop(node, "assigned-addresses", reg, sizeof reg) < 12) { 126 printf(": cannot get address property\n"); 127 return; 128 } 129 regbase = reg[2] + 0x2000; 130 dmabase = reg[2] + 0x1000; 131 132 /* 133 * XXX PCI_INTERRUPT_REG seems to be wired to 0. 134 * XXX So use fixed intrpin and intrline values. 135 */ 136 if (pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_INTERRUPT_REG) == 0) { 137 pa->pa_intrpin = 1; 138 pa->pa_intrline = 39; 139 } 140 141 if (pci_intr_map(pa, &ih)) { 142 printf(": unable to map interrupt\n"); 143 return; 144 } 145 printf(": interrupting at %s\n", pci_intr_string(pa->pa_pc, ih)); 146 147 chp->cmd_iot = chp->ctl_iot = macppc_make_bus_space_tag(regbase, 4); 148 149 if (bus_space_map(chp->cmd_iot, 0, WDC_REG_NPORTS, 0, &chp->cmd_ioh) || 150 bus_space_subregion(chp->cmd_iot, chp->cmd_ioh, 151 WDC_AUXREG_OFFSET, 1, &chp->ctl_ioh)) { 152 printf("%s: couldn't map registers\n", self->dv_xname); 153 return; 154 } 155 156 if (pci_intr_establish(pa->pa_pc, ih, IPL_BIO, wdcintr, chp) == NULL) { 157 printf("%s: unable to establish interrupt\n", self->dv_xname); 158 return; 159 } 160 161 162 sc->sc_wdcdev.PIO_cap = 4; 163 sc->sc_wdcdev.DMA_cap = 2; 164 sc->sc_wdcdev.UDMA_cap = 5; 165 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_MODE; 166 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA | WDC_CAPABILITY_UDMA; 167 sc->wdc_chanptr = chp; 168 sc->sc_wdcdev.channels = &sc->wdc_chanptr; 169 sc->sc_wdcdev.nchannels = 1; 170 sc->sc_wdcdev.dma_arg = sc; 171 sc->sc_wdcdev.dma_init = kauai_dma_init; 172 sc->sc_wdcdev.dma_start = kauai_dma_start; 173 sc->sc_wdcdev.dma_finish = kauai_dma_finish; 174 sc->sc_wdcdev.set_modes = kauai_set_modes; 175 sc->sc_calc_timing = calc_timing_kauai; 176 sc->sc_dmareg = (void *)dmabase; 177 178 chp->channel = 0; 179 chp->wdc = &sc->sc_wdcdev; 180 chp->ch_queue = &sc->wdc_queue; 181 182 wdcattach(chp); 183 184 /* Modify access timings. */ 185 kauai_set_modes(chp); 186 } 187 188 void 189 kauai_set_modes(chp) 190 struct channel_softc *chp; 191 { 192 struct kauai_softc *sc = (void *)chp->wdc; 193 struct ata_drive_datas *drvp0 = &chp->ch_drive[0]; 194 struct ata_drive_datas *drvp1 = &chp->ch_drive[1]; 195 struct ata_drive_datas *drvp; 196 int drive; 197 198 if ((drvp0->drive_flags & DRIVE) && (drvp1->drive_flags & DRIVE)) { 199 drvp0->PIO_mode = drvp1->PIO_mode = 200 min(drvp0->PIO_mode, drvp1->PIO_mode); 201 } 202 203 for (drive = 0; drive < 2; drive++) { 204 drvp = &chp->ch_drive[drive]; 205 if (drvp->drive_flags & DRIVE) { 206 (*sc->sc_calc_timing)(sc, drive); 207 bus_space_write_4(chp->cmd_iot, chp->cmd_ioh, 208 PIO_CONFIG_REG, sc->sc_piotiming_r[drive]); 209 bus_space_write_4(chp->cmd_iot, chp->cmd_ioh, 210 DMA_CONFIG_REG, sc->sc_dmatiming_r[drive]); 211 } 212 } 213 214 wdc_print_modes(chp); 215 } 216 217 /* 218 * IDE transfer timings 219 */ 220 static const u_int pio_timing_kauai[] = { /* 0xff000fff */ 221 0x08000a92, /* Mode 0 */ 222 0x0800060f, /* 1 */ 223 0x0800038b, /* 2 */ 224 0x05000249, /* 3 */ 225 0x04000148 /* 4 */ 226 }; 227 static const u_int dma_timing_kauai[] = { /* 0x00fff000 */ 228 0x00618000, /* Mode 0 */ 229 0x00209000, /* 1 */ 230 0x00148000 /* 2 */ 231 }; 232 static const u_int udma_timing_kauai[] = { /* 0x0000ffff */ 233 0x000070c0, /* Mode 0 */ 234 0x00005d80, /* 1 */ 235 0x00004a60, /* 2 */ 236 0x00003a50, /* 3 */ 237 0x00002a30, /* 4 */ 238 0x00002921 /* 5 */ 239 }; 240 241 /* 242 * Timing calculation for Kauai. 243 */ 244 void 245 calc_timing_kauai(sc, drive) 246 struct kauai_softc *sc; 247 int drive; 248 { 249 struct channel_softc *chp = &sc->wdc_channel; 250 struct ata_drive_datas *drvp = &chp->ch_drive[drive]; 251 int piomode = drvp->PIO_mode; 252 int dmamode = drvp->DMA_mode; 253 int udmamode = drvp->UDMA_mode; 254 u_int pioconf, dmaconf; 255 256 pioconf = pio_timing_kauai[piomode]; 257 258 dmaconf = 0; 259 if (drvp->drive_flags & DRIVE_DMA) 260 dmaconf |= dma_timing_kauai[dmamode]; 261 if (drvp->drive_flags & DRIVE_UDMA) 262 dmaconf |= udma_timing_kauai[udmamode]; 263 264 if (drvp->drive_flags & DRIVE_UDMA) 265 dmaconf |= 1; 266 267 sc->sc_piotiming_r[drive] = sc->sc_piotiming_w[drive] = pioconf; 268 sc->sc_dmatiming_r[drive] = sc->sc_dmatiming_w[drive] = dmaconf; 269 } 270 271 int 272 kauai_dma_init(v, channel, drive, databuf, datalen, flags) 273 void *v; 274 void *databuf; 275 size_t datalen; 276 int flags; 277 { 278 struct kauai_softc *sc = v; 279 dbdma_command_t *cmdp = sc->sc_dmacmd; 280 struct channel_softc *chp = &sc->wdc_channel; 281 vaddr_t va = (vaddr_t)databuf; 282 int read = flags & WDC_DMA_READ; 283 int cmd = read ? DBDMA_CMD_IN_MORE : DBDMA_CMD_OUT_MORE; 284 u_int offset; 285 286 bus_space_write_4(chp->cmd_iot, chp->cmd_ioh, DMA_CONFIG_REG, 287 read ? sc->sc_dmatiming_r[drive] : sc->sc_dmatiming_w[drive]); 288 bus_space_read_4(chp->cmd_iot, chp->cmd_ioh, DMA_CONFIG_REG); 289 290 offset = va & PGOFSET; 291 292 /* if va is not page-aligned, setup the first page */ 293 if (offset != 0) { 294 int rest = PAGE_SIZE - offset; /* the rest of the page */ 295 296 if (datalen > rest) { /* if continues to next page */ 297 DBDMA_BUILD(cmdp, cmd, 0, rest, vtophys(va), 298 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, 299 DBDMA_BRANCH_NEVER); 300 datalen -= rest; 301 va += rest; 302 cmdp++; 303 } 304 } 305 306 /* now va is page-aligned */ 307 while (datalen > PAGE_SIZE) { 308 DBDMA_BUILD(cmdp, cmd, 0, PAGE_SIZE, vtophys(va), 309 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 310 datalen -= PAGE_SIZE; 311 va += PAGE_SIZE; 312 cmdp++; 313 } 314 315 /* the last page (datalen <= PAGE_SIZE here) */ 316 cmd = read ? DBDMA_CMD_IN_LAST : DBDMA_CMD_OUT_LAST; 317 DBDMA_BUILD(cmdp, cmd, 0, datalen, vtophys(va), 318 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 319 cmdp++; 320 321 DBDMA_BUILD(cmdp, DBDMA_CMD_STOP, 0, 0, 0, 322 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 323 324 return 0; 325 } 326 327 void 328 kauai_dma_start(v, channel, drive) 329 void *v; 330 int channel, drive; 331 { 332 struct kauai_softc *sc = v; 333 334 dbdma_start(sc->sc_dmareg, sc->sc_dmacmd); 335 } 336 337 int 338 kauai_dma_finish(v, channel, drive, read) 339 void *v; 340 int channel, drive; 341 int read; 342 { 343 struct kauai_softc *sc = v; 344 345 dbdma_stop(sc->sc_dmareg); 346 return 0; 347 } 348 349 /* 350 * Find OF-device corresponding to the PCI device. 351 */ 352 int 353 getnodebypci(pc, tag) 354 pci_chipset_tag_t pc; 355 pcitag_t tag; 356 { 357 int bus, dev, func; 358 u_int reg[5]; 359 int p, q; 360 int l, b, d, f; 361 362 pci_decompose_tag(pc, tag, &bus, &dev, &func); 363 364 for (q = OF_peer(0); q; q = p) { 365 l = OF_getprop(q, "assigned-addresses", reg, sizeof(reg)); 366 if (l > 4) { 367 b = (reg[0] >> 16) & 0xff; 368 d = (reg[0] >> 11) & 0x1f; 369 f = (reg[0] >> 8) & 0x07; 370 371 if (b == bus && d == dev && f == func) 372 return q; 373 } 374 if ((p = OF_child(q))) 375 continue; 376 while (q) { 377 if ((p = OF_peer(q))) 378 break; 379 q = OF_parent(q); 380 } 381 } 382 return 0; 383 } 384
Indexes created Thu Oct 02 14:10:14 GMT 2025