static void tegra_mmc_set_ios(struct mmc *mmc)
{
struct mmc_host *host = mmc->priv;
unsigned char ctrl;
debug(" mmc_set_ios called\n");
debug("bus_width: %x, clock: %d\n", mmc->bus_width, mmc->clock);
/* Change clock first */
mmc_change_clock(host, mmc->clock);
ctrl = readb(&host->reg->hostctl);
/*
* WIDE8[5]
* 0 = Depend on WIDE4
* 1 = 8-bit mode
* WIDE4[1]
* 1 = 4-bit mode
* 0 = 1-bit mode
*/
if (mmc->bus_width == 8)
ctrl |= (1 << 5);
else if (mmc->bus_width == 4)
ctrl |= (1 << 1);
else
ctrl &= ~(1 << 1);
writeb(ctrl, &host->reg->hostctl);
debug("mmc_set_ios: hostctl = %08X\n", ctrl);
}
static void mmc_set_ios(struct mmc *mmc)
{
struct mmc_host *host = mmc->priv;
unsigned char ctrl;
unsigned long val;
debug("bus_width: %x, clock: %d\n", mmc->bus_width, mmc->clock);
/*
* SELCLKPADDS[17:16]
* 00 = 2mA
* 01 = 4mA
* 10 = 7mA
* 11 = 9mA
*/
writel(0x3 << 16, &host->reg->control4);
val = readl(&host->reg->control2);
val &= (0x3 << 4);
val |= (1 << 31) | /* write status clear async mode enable */
(1 << 30) | /* command conflict mask enable */
(1 << 14) | /* Feedback Clock Enable for Rx Clock */
(1 << 8); /* SDCLK hold enable */
writel(val, &host->reg->control2);
/*
* FCSEL1[15] FCSEL0[7]
* FCSel[1:0] : Rx Feedback Clock Delay Control
* Inverter delay means10ns delay if SDCLK 50MHz setting
* 01 = Delay1 (basic delay)
* 11 = Delay2 (basic delay + 2ns)
* 00 = Delay3 (inverter delay)
* 10 = Delay4 (inverter delay + 2ns)
*/
writel(0x8080, &host->reg->control3);
mmc_change_clock(host, mmc->clock);
ctrl = readb(&host->reg->hostctl);
/*
* WIDE8[5]
* 0 = Depend on WIDE4
* 1 = 8-bit mode
* WIDE4[1]
* 1 = 4-bit mode
* 0 = 1-bit mode
*/
if (mmc->bus_width == 8)
ctrl |= (1 << 5);
else if (mmc->bus_width == 4)
ctrl |= (1 << 1);
else
ctrl &= ~(1 << 1);
/*
* OUTEDGEINV[2]
* 1 = Riging edge output
* 0 = Falling edge output
*/
ctrl &= ~(1 << 2);
writeb(ctrl, &host->reg->hostctl);
}