static void s3c_hsmmc_set_ios(struct mmc *mmc)
{
struct sdhci_host *host = mmc->priv;
u8 ctrl;
dbg("set_ios: bus_width: %x, clock: %d\n", mmc->bus_width, mmc->clock);
setup_sdhci0_cfg_card(host);
sdhci_change_clock(host, mmc->clock);
ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
if (mmc->bus_width == MMC_BUS_WIDTH_8)
ctrl |= SDHCI_CTRL_8BITBUS;
else
ctrl &= ~SDHCI_CTRL_8BITBUS;
if (mmc->bus_width == MMC_BUS_WIDTH_4)
ctrl |= SDHCI_CTRL_4BITBUS;
else
ctrl &= ~SDHCI_CTRL_4BITBUS;
ctrl &= ~SDHCI_CTRL_HISPD;
writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
}
static int s3c_hsmmc_init(struct mmc *mmc)
{
struct sdhci_host *host = (struct sdhci_host *)mmc->priv;
sdhci_reset(host, SDHCI_RESET_ALL);
host->version = readw(host->ioaddr + SDHCI_HOST_VERSION);
sdhci_init(host);
sdhci_change_clock(host, 400000);
return 0;
}
static void sdhci_s3c_change_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_s3c *ourhost = to_s3c(host);
unsigned int best = UINT_MAX;
unsigned int delta;
int best_src = 0;
int src;
u32 ctrl;
for (src = 0; src < MAX_BUS_CLK; src++) {
delta = sdhci_s3c_consider_clock(ourhost, src, clock);
if (delta < best) {
best = delta;
best_src = src;
}
}
dev_dbg(&ourhost->pdev->dev,
"selected source %d, clock %d, delta %d\n",
best_src, clock, best);
/* turn clock off to card before changing clock source */
writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
/* select the new clock source */
if (ourhost->cur_clk != best_src) {
struct clk *clk = ourhost->clk_bus[best_src];
ourhost->cur_clk = best_src;
host->max_clk = clk_get_rate(clk);
host->timeout_clk = host->max_clk / 1000;
ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2);
}
sdhci_change_clock(host, clock);
}
