static int
brcmf_sdio_chip_buscoreprep(struct brcmf_sdio_dev *sdiodev)
{
int err = 0;
u8 clkval, clkset;
/* Try forcing SDIO core to do ALPAvail request only */
clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_ALP_AVAIL_REQ;
brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err);
if (err) {
brcmf_dbg(ERROR, "error writing for HT off\n");
return err;
}
/* If register supported, wait for ALPAvail and then force ALP */
/* This may take up to 15 milliseconds */
clkval = brcmf_sdcard_cfg_read(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_CHIPCLKCSR, NULL);
if ((clkval & ~SBSDIO_AVBITS) != clkset) {
brcmf_dbg(ERROR, "ChipClkCSR access: wrote 0x%02x read 0x%02x\n",
clkset, clkval);
return -EACCES;
}
SPINWAIT(((clkval = brcmf_sdcard_cfg_read(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_CHIPCLKCSR, NULL)),
!SBSDIO_ALPAV(clkval)),
PMU_MAX_TRANSITION_DLY);
if (!SBSDIO_ALPAV(clkval)) {
brcmf_dbg(ERROR, "timeout on ALPAV wait, clkval 0x%02x\n",
clkval);
return -EBUSY;
}
clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_FORCE_ALP;
brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err);
udelay(65);
/* Also, disable the extra SDIO pull-ups */
brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_SDIOPULLUP, 0, NULL);
return 0;
}
static bool
si_buscore_prep(si_info_t *sii, uint bustype, uint devid, void *sdh)
{
/* need to set memseg flag for CF card first before any sb registers access */
if (BUSTYPE(bustype) == PCMCIA_BUS)
sii->memseg = TRUE;
if (BUSTYPE(bustype) == SDIO_BUS) {
int err;
uint8 clkset;
/* Try forcing SDIO core to do ALPAvail request only */
clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_ALP_AVAIL_REQ;
bcmsdh_cfg_write(sdh, SDIO_FUNC_1, SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err);
if (!err) {
uint8 clkval;
/* If register supported, wait for ALPAvail and then force ALP */
clkval = bcmsdh_cfg_read(sdh, SDIO_FUNC_1, SBSDIO_FUNC1_CHIPCLKCSR, NULL);
if ((clkval & ~SBSDIO_AVBITS) == clkset) {
SPINWAIT(((clkval = bcmsdh_cfg_read(sdh, SDIO_FUNC_1,
SBSDIO_FUNC1_CHIPCLKCSR, NULL)), !SBSDIO_ALPAV(clkval)),
PMU_MAX_TRANSITION_DLY);
if (!SBSDIO_ALPAV(clkval)) {
SI_ERROR(("timeout on ALPAV wait, clkval 0x%02x\n",
clkval));
return FALSE;
}
clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_FORCE_ALP;
bcmsdh_cfg_write(sdh, SDIO_FUNC_1, SBSDIO_FUNC1_CHIPCLKCSR,
clkset, &err);
OSL_DELAY(65);
}
}
#ifndef MMC_SDIO_FORCE_PULLUP
/* Also, disable the extra SDIO pull-ups */
bcmsdh_cfg_write(sdh, SDIO_FUNC_1, SBSDIO_FUNC1_SDIOPULLUP, 0, NULL);
#endif
}
return TRUE;
}
