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/* $OpenBSD: sdhc_pci.c,v 1.9 2010/08/27 15:41:42 deraadt Exp $ */
/*
* Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/sdmmc/sdhcreg.h>
#include <dev/sdmmc/sdhcvar.h>
#include <dev/sdmmc/sdmmcvar.h>
/*
* 8-bit PCI configuration register that tells us how many slots there
* are and which BAR entry corresponds to the first slot.
*/
#define SDHC_PCI_CONF_SLOT_INFO 0x40
#define SDHC_PCI_NUM_SLOTS(info) ((((info) >> 4) & 0x7) + 1)
#define SDHC_PCI_FIRST_BAR(info) ((info) & 0x7)
/* TI specific register */
#define SDHC_PCI_GENERAL_CTL 0x4c
#define MMC_SD_DIS 0x02
struct sdhc_pci_softc {
struct sdhc_softc sc;
void *sc_ih;
};
int sdhc_pci_match(struct device *, void *, void *);
void sdhc_pci_attach(struct device *, struct device *, void *);
void sdhc_takecontroller(struct pci_attach_args *);
struct cfattach sdhc_pci_ca = {
sizeof(struct sdhc_pci_softc), sdhc_pci_match, sdhc_pci_attach,
NULL, sdhc_activate
};
int
sdhc_pci_match(struct device *parent, void *match, void *aux)
{
struct pci_attach_args *pa = aux;
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SYSTEM &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SYSTEM_SDHC)
return 1;
return 0;
}
void
sdhc_pci_attach(struct device *parent, struct device *self, void *aux)
{
struct sdhc_pci_softc *sc = (struct sdhc_pci_softc *)self;
struct pci_attach_args *pa = aux;
pci_intr_handle_t ih;
char const *intrstr;
int slotinfo;
int nslots;
int usedma;
int reg;
bus_space_tag_t iot;
bus_space_handle_t ioh;
bus_size_t size;
/* Some TI controllers needs special treatment. */
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_TI &&
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_TI_PCI7XX1_SD &&
pa->pa_function == 4)
sdhc_takecontroller(pa);
/* ENE controllers break if set to 0V bus power */
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ENE &&
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ENE_SDCARD)
sc->sc.sc_flags |= SDHC_F_NOPWR0;
if (pci_intr_map(pa, &ih)) {
printf(": can't map interrupt\n");
return;
}
intrstr = pci_intr_string(pa->pa_pc, ih);
sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_SDMMC,
sdhc_intr, sc, sc->sc.sc_dev.dv_xname);
if (sc->sc_ih == NULL) {
printf(": can't establish interrupt\n");
return;
}
printf(": %s\n", intrstr);
/* Enable use of DMA if supported by the interface. */
usedma = PCI_INTERFACE(pa->pa_class) == SDHC_PCI_INTERFACE_DMA;
/*
* Map and attach all hosts supported by the host controller.
*/
slotinfo = pci_conf_read(pa->pa_pc, pa->pa_tag,
SDHC_PCI_CONF_SLOT_INFO);
nslots = SDHC_PCI_NUM_SLOTS(slotinfo);
/* Allocate an array big enough to hold all the possible hosts */
sc->sc.sc_host = malloc(sizeof(struct sdhc_host *) * nslots, M_DEVBUF,
M_WAITOK);
/* XXX: handle 64-bit BARs */
for (reg = SDHC_PCI_BAR_START + SDHC_PCI_FIRST_BAR(slotinfo) *
sizeof(u_int32_t);
reg < SDHC_PCI_BAR_END && nslots > 0;
reg += sizeof(u_int32_t), nslots--) {
if (pci_mem_find(pa->pa_pc, pa->pa_tag, reg,
NULL, NULL, NULL) != 0)
continue;
if (pci_mapreg_map(pa, reg, PCI_MAPREG_TYPE_MEM, 0,
&iot, &ioh, NULL, &size, 0)) {
printf("%s at 0x%x: can't map registers\n",
sc->sc.sc_dev.dv_xname, reg);
continue;
}
if (sdhc_host_found(&sc->sc, iot, ioh, size, usedma) != 0)
/* XXX: sc->sc_host leak */
printf("%s at 0x%x: can't initialize host\n",
sc->sc.sc_dev.dv_xname, reg);
}
/*
* Establish power and shutdown hooks.
*/
(void)powerhook_establish(sdhc_powerhook, &sc->sc);
(void)shutdownhook_establish(sdhc_shutdown, &sc->sc);
}
void
sdhc_takecontroller(struct pci_attach_args *pa)
{
pcitag_t tag;
pcireg_t id, reg;
/* Look at func 3 for the flash device */
tag = pci_make_tag(pa->pa_pc, pa->pa_bus, pa->pa_device, 3);
id = pci_conf_read(pa->pa_pc, tag, PCI_ID_REG);
if (PCI_PRODUCT(id) != PCI_PRODUCT_TI_PCI7XX1_FLASH)
return;
/*
* Disable MMC/SD on the flash media controller so the
* SD host takes over.
*/
reg = pci_conf_read(pa->pa_pc, tag, SDHC_PCI_GENERAL_CTL);
reg |= MMC_SD_DIS;
pci_conf_write(pa->pa_pc, tag, SDHC_PCI_GENERAL_CTL, reg);
}
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