1 /* $OpenBSD: sdhc_pci.c,v 1.7 2007/10/30 18:13:45 chl Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <sys/device.h> 21 #include <sys/systm.h> 22 #include <sys/malloc.h> 23 24 #include <dev/pci/pcivar.h> 25 #include <dev/pci/pcidevs.h> 26 #include <dev/sdmmc/sdhcreg.h> 27 #include <dev/sdmmc/sdhcvar.h> 28 #include <dev/sdmmc/sdmmcvar.h> 29 30 /* 31 * 8-bit PCI configuration register that tells us how many slots there 32 * are and which BAR entry corresponds to the first slot. 33 */ 34 #define SDHC_PCI_CONF_SLOT_INFO 0x40 35 #define SDHC_PCI_NUM_SLOTS(info) ((((info) >> 4) & 0x7) + 1) 36 #define SDHC_PCI_FIRST_BAR(info) ((info) & 0x7) 37 38 /* TI specific register */ 39 #define SDHC_PCI_GENERAL_CTL 0x4c 40 #define MMC_SD_DIS 0x02 41 42 struct sdhc_pci_softc { 43 struct sdhc_softc sc; 44 void *sc_ih; 45 }; 46 47 int sdhc_pci_match(struct device *, void *, void *); 48 void sdhc_pci_attach(struct device *, struct device *, void *); 49 void sdhc_takecontroller(struct pci_attach_args *); 50 51 struct cfattach sdhc_pci_ca = { 52 sizeof(struct sdhc_pci_softc), sdhc_pci_match, sdhc_pci_attach 53 }; 54 55 int 56 sdhc_pci_match(struct device *parent, void *match, void *aux) 57 { 58 struct pci_attach_args *pa = aux; 59 60 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SYSTEM && 61 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SYSTEM_SDHC) 62 return 1; 63 64 return 0; 65 } 66 67 void 68 sdhc_pci_attach(struct device *parent, struct device *self, void *aux) 69 { 70 struct sdhc_pci_softc *sc = (struct sdhc_pci_softc *)self; 71 struct pci_attach_args *pa = aux; 72 pci_intr_handle_t ih; 73 char const *intrstr; 74 int slotinfo; 75 int nslots; 76 int usedma; 77 int reg; 78 bus_space_tag_t iot; 79 bus_space_handle_t ioh; 80 bus_size_t size; 81 82 /* Some TI controllers needs special treatment. */ 83 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_TI && 84 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_TI_PCI7XX1_SD && 85 pa->pa_function == 4) 86 sdhc_takecontroller(pa); 87 88 /* ENE controllers break if set to 0V bus power */ 89 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ENE && 90 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ENE_SDCARD) 91 sc->sc.sc_flags |= SDHC_F_NOPWR0; 92 93 if (pci_intr_map(pa, &ih)) { 94 printf(": can't map interrupt\n"); 95 return; 96 } 97 98 intrstr = pci_intr_string(pa->pa_pc, ih); 99 sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_SDMMC, 100 sdhc_intr, sc, sc->sc.sc_dev.dv_xname); 101 if (sc->sc_ih == NULL) { 102 printf(": can't establish interrupt\n"); 103 return; 104 } 105 printf(": %s\n", intrstr); 106 107 /* Enable use of DMA if supported by the interface. */ 108 usedma = PCI_INTERFACE(pa->pa_class) == SDHC_PCI_INTERFACE_DMA; 109 110 /* 111 * Map and attach all hosts supported by the host controller. 112 */ 113 slotinfo = pci_conf_read(pa->pa_pc, pa->pa_tag, 114 SDHC_PCI_CONF_SLOT_INFO); 115 nslots = SDHC_PCI_NUM_SLOTS(slotinfo); 116 117 /* Allocate an array big enough to hold all the possible hosts */ 118 sc->sc.sc_host = malloc(sizeof(struct sdhc_host *) * nslots, M_DEVBUF, 119 M_WAITOK); 120 121 /* XXX: handle 64-bit BARs */ 122 for (reg = SDHC_PCI_BAR_START + SDHC_PCI_FIRST_BAR(slotinfo) * 123 sizeof(u_int32_t); 124 reg < SDHC_PCI_BAR_END && nslots > 0; 125 reg += sizeof(u_int32_t), nslots--) { 126 127 if (pci_mem_find(pa->pa_pc, pa->pa_tag, reg, 128 NULL, NULL, NULL) != 0) 129 continue; 130 131 if (pci_mapreg_map(pa, reg, PCI_MAPREG_TYPE_MEM, 0, 132 &iot, &ioh, NULL, &size, 0)) { 133 printf("%s at 0x%x: can't map registers\n", 134 sc->sc.sc_dev.dv_xname, reg); 135 continue; 136 } 137 138 if (sdhc_host_found(&sc->sc, iot, ioh, size, usedma) != 0) 139 /* XXX: sc->sc_host leak */ 140 printf("%s at 0x%x: can't initialize host\n", 141 sc->sc.sc_dev.dv_xname, reg); 142 } 143 144 /* 145 * Establish power and shutdown hooks. 146 */ 147 (void)powerhook_establish(sdhc_power, &sc->sc); 148 (void)shutdownhook_establish(sdhc_shutdown, &sc->sc); 149 } 150 151 void 152 sdhc_takecontroller(struct pci_attach_args *pa) 153 { 154 pcitag_t tag; 155 pcireg_t id, reg; 156 157 /* Look at func 3 for the flash device */ 158 tag = pci_make_tag(pa->pa_pc, pa->pa_bus, pa->pa_device, 3); 159 id = pci_conf_read(pa->pa_pc, tag, PCI_ID_REG); 160 if (PCI_PRODUCT(id) != PCI_PRODUCT_TI_PCI7XX1_FLASH) 161 return; 162 163 /* 164 * Disable MMC/SD on the flash media controller so the 165 * SD host takes over. 166 */ 167 reg = pci_conf_read(pa->pa_pc, tag, SDHC_PCI_GENERAL_CTL); 168 reg |= MMC_SD_DIS; 169 pci_conf_write(pa->pa_pc, tag, SDHC_PCI_GENERAL_CTL, reg); 170 } 171