1 /* $NetBSD: dwlpx_pci.c,v 1.18 2012/02/06 02:14:14 matt Exp $ */ 2 3 /* 4 * Copyright (c) 1997 by Matthew Jacob 5 * NASA AMES Research Center. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice immediately at the beginning of the file, without modification, 13 * 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. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 34 35 __KERNEL_RCSID(0, "$NetBSD: dwlpx_pci.c,v 1.18 2012/02/06 02:14:14 matt Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 42 #include <dev/pci/pcireg.h> 43 #include <dev/pci/pcivar.h> 44 #include <alpha/tlsb/tlsbreg.h> 45 #include <alpha/pci/dwlpxreg.h> 46 #include <alpha/pci/dwlpxvar.h> 47 48 #define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr))) 49 50 void dwlpx_attach_hook(device_t, device_t, 51 struct pcibus_attach_args *); 52 int dwlpx_bus_maxdevs(void *, int); 53 pcitag_t dwlpx_make_tag(void *, int, int, int); 54 void dwlpx_decompose_tag(void *, pcitag_t, int *, int *, 55 int *); 56 pcireg_t dwlpx_conf_read(void *, pcitag_t, int); 57 void dwlpx_conf_write(void *, pcitag_t, int, pcireg_t); 58 59 void 60 dwlpx_pci_init(pci_chipset_tag_t pc, void *v) 61 { 62 pc->pc_conf_v = v; 63 pc->pc_attach_hook = dwlpx_attach_hook; 64 pc->pc_bus_maxdevs = dwlpx_bus_maxdevs; 65 pc->pc_make_tag = dwlpx_make_tag; 66 pc->pc_decompose_tag = dwlpx_decompose_tag; 67 pc->pc_conf_read = dwlpx_conf_read; 68 pc->pc_conf_write = dwlpx_conf_write; 69 } 70 71 void 72 dwlpx_attach_hook(device_t parent, device_t self, struct pcibus_attach_args *pba) 73 { 74 #if 0 75 struct dwlpx_config *ccp = pba->pba_pc->pc_conf_v; 76 printf("dwlpx_attach_hook for %s\n", device_xname(ccp->cc_sc->dwlpx_dev)); 77 #endif 78 } 79 80 int 81 dwlpx_bus_maxdevs(void *cpv, int busno) 82 { 83 return DWLPX_MAXDEV; 84 } 85 86 pcitag_t 87 dwlpx_make_tag(void *cpv, int b, int d, int f) 88 { 89 pcitag_t tag; 90 int hpcdev, pci_idsel; 91 92 pci_idsel = (1 << ((d & 0x3) + 2)); 93 hpcdev = d >> 2; 94 tag = (b << 24) | (hpcdev << 22) | (pci_idsel << 16) | (f << 13); 95 return (tag); 96 } 97 98 void 99 dwlpx_decompose_tag(void *cpv, pcitag_t tag, int *bp, int *dp, int *fp) 100 { 101 102 if (bp != NULL) 103 *bp = (tag >> 24) & 0xff; 104 if (dp != NULL) { 105 int j, i = (tag >> 18) & 0xf; 106 j = -1; 107 while (i != 0) { 108 j++; 109 i >>= 1; 110 } 111 j += (((tag >> 22) & 3) << 2); 112 *dp = j; 113 } 114 if (fp != NULL) 115 *fp = (tag >> 13) & 0x7; 116 } 117 118 pcireg_t 119 dwlpx_conf_read(void *cpv, pcitag_t tag, int offset) 120 { 121 struct dwlpx_config *ccp = cpv; 122 struct dwlpx_softc *sc; 123 pcireg_t *dp, data = (pcireg_t) -1; 124 unsigned long paddr; 125 int secondary, i, s = 0; 126 uint32_t rvp; 127 128 if (ccp == NULL) { 129 panic("NULL ccp in dwlpx_conf_read"); 130 } 131 sc = ccp->cc_sc; 132 secondary = tag >> 24; 133 if (secondary) { 134 tag &= 0x1fffff; 135 tag |= (secondary << 21); 136 137 #if 0 138 printf("read secondary %d reg %x (tag %x)", 139 secondary, offset, tag); 140 #endif 141 142 alpha_pal_draina(); 143 s = splhigh(); 144 /* 145 * Set up HPCs for type 1 cycles. 146 */ 147 for (i = 0; i < sc->dwlpx_nhpc; i++) { 148 rvp = REGVAL(PCIA_CTL(i) + ccp->cc_sysbase) | 149 PCIA_CTL_T1CYC; 150 alpha_mb(); 151 REGVAL(PCIA_CTL(i) + ccp->cc_sysbase) = rvp; 152 alpha_mb(); 153 } 154 } 155 paddr = (unsigned long) tag; 156 paddr |= DWLPX_PCI_CONF; 157 paddr |= ((unsigned long) ((offset >> 2) << 7)); 158 paddr |= (((unsigned long) sc->dwlpx_hosenum) << 34); 159 paddr |= (((u_long) sc->dwlpx_node - 4) << 36); 160 paddr |= (1LL << 39); 161 paddr |= (3LL << 3); /* 32 Bit PCI byte enables */ 162 163 dp = (pcireg_t *)KV(paddr); 164 if (badaddr(dp, sizeof (*dp)) == 0) { 165 data = *dp; 166 } 167 if (secondary) { 168 alpha_pal_draina(); 169 for (i = 0; i < sc->dwlpx_nhpc; i++) { 170 rvp = REGVAL(PCIA_CTL(i) + ccp->cc_sysbase) & 171 ~PCIA_CTL_T1CYC; 172 alpha_mb(); 173 REGVAL(PCIA_CTL(i) + ccp->cc_sysbase) = rvp; 174 alpha_mb(); 175 } 176 (void) splx(s); 177 #if 0 178 printf("=%x\n", data); 179 #endif 180 } 181 return (data); 182 } 183 184 void 185 dwlpx_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data) 186 { 187 struct dwlpx_config *ccp = cpv; 188 struct dwlpx_softc *sc; 189 pcireg_t *dp; 190 unsigned long paddr; 191 int secondary, i, s = 0; 192 uint32_t rvp; 193 194 if (ccp == NULL) { 195 panic("NULL ccp in dwlpx_conf_write"); 196 } 197 sc = ccp->cc_sc; 198 secondary = tag >> 24; 199 if (secondary) { 200 tag &= 0x1fffff; 201 tag |= (secondary << 21); 202 #if 0 203 printf("write secondary %d reg %x (tag %x) with %x\n", 204 secondary, offset, tag, data); 205 #endif 206 207 alpha_pal_draina(); 208 s = splhigh(); 209 /* 210 * Set up HPCs for type 1 cycles. 211 */ 212 for (i = 0; i < sc->dwlpx_nhpc; i++) { 213 rvp = REGVAL(PCIA_CTL(i) + ccp->cc_sysbase) | 214 PCIA_CTL_T1CYC; 215 alpha_mb(); 216 REGVAL(PCIA_CTL(i) + ccp->cc_sysbase) = rvp; 217 alpha_mb(); 218 } 219 } 220 paddr = (unsigned long) tag; 221 paddr |= DWLPX_PCI_CONF; 222 paddr |= ((unsigned long) ((offset >> 2) << 7)); 223 paddr |= (((unsigned long) sc->dwlpx_hosenum) << 34); 224 paddr |= (((u_long) sc->dwlpx_node - 4) << 36); 225 paddr |= (1LL << 39); 226 paddr |= (3LL << 3); /* 32 bit PCI byte enables */ 227 228 dp = (pcireg_t *)KV(paddr); 229 *dp = data; 230 alpha_mb(); 231 if (secondary) { 232 alpha_pal_draina(); 233 for (i = 0; i < sc->dwlpx_nhpc; i++) { 234 rvp = REGVAL(PCIA_CTL(i) + ccp->cc_sysbase) & 235 ~PCIA_CTL_T1CYC; 236 alpha_mb(); 237 REGVAL(PCIA_CTL(i) + ccp->cc_sysbase) = rvp; 238 alpha_mb(); 239 } 240 (void) splx(s); 241 } 242 } 243