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author | Wolfgang Denk <wd@denx.de> | 2012-05-20 19:20:50 (GMT) |
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committer | Wolfgang Denk <wd@denx.de> | 2012-05-20 19:20:50 (GMT) |
commit | 6bc337fb13003a9a949dfb2713e308fb97faae8a (patch) | |
tree | 3ce9b22609e6c1d3e140fd2fb96af0c26efa948d /drivers/mmc/s5p_sdhci.c | |
parent | f50bf50d7f6f99c5ad4666d63a7eef43d3940500 (diff) | |
parent | 7d2d58b4e63a8307f713e6b17fdb9b2413548574 (diff) | |
download | u-boot-6bc337fb13003a9a949dfb2713e308fb97faae8a.tar.xz |
Merge branch 'master' of git://git.denx.de/u-boot-mmc
* 'master' of git://git.denx.de/u-boot-mmc:
ARM: SAMSUNG: support sdhci controller
mmc: support the sdhci instead of s5p_mmc for samsung-soc
mmc: add the quirk to use the sdhci for samsung-soc
mmc: sdhci: add the quirk for broken r1b response
i.MX28: Lower the amount of blocks transfered in one DMA cycle
mmc: fsl_esdhc: Poll until card is not busy anymore
include/mmc.h: remove struct mmc_csd
mmc: omap: handle controller errors properly
mmc: omap: improve stat wait message
mmc: omap: follow TRM procedure to power on cards
mmc:fix: Set mmc width according to MMC host capabilities
Diffstat (limited to 'drivers/mmc/s5p_sdhci.c')
-rw-r--r-- | drivers/mmc/s5p_sdhci.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/mmc/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c new file mode 100644 index 0000000..1d4481b --- /dev/null +++ b/drivers/mmc/s5p_sdhci.c @@ -0,0 +1,98 @@ +/* + * (C) Copyright 2012 SAMSUNG Electronics + * Jaehoon Chung <jh80.chung@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <common.h> +#include <malloc.h> +#include <sdhci.h> +#include <asm/arch/mmc.h> + +static char *S5P_NAME = "SAMSUNG SDHCI"; +static void s5p_sdhci_set_control_reg(struct sdhci_host *host) +{ + unsigned long val, ctrl; + /* + * SELCLKPADDS[17:16] + * 00 = 2mA + * 01 = 4mA + * 10 = 7mA + * 11 = 9mA + */ + sdhci_writel(host, SDHCI_CTRL4_DRIVE_MASK(0x3), SDHCI_CONTROL4); + + val = sdhci_readl(host, SDHCI_CONTROL2); + val &= SDHCI_CTRL2_SELBASECLK_SHIFT; + + val |= SDHCI_CTRL2_ENSTAASYNCCLR | + SDHCI_CTRL2_ENCMDCNFMSK | + SDHCI_CTRL2_ENFBCLKRX | + SDHCI_CTRL2_ENCLKOUTHOLD; + + sdhci_writel(host, val, SDHCI_CONTROL2); + + /* + * FCSEL3[31] FCSEL2[23] 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) + */ + val = SDHCI_CTRL3_FCSEL3 | SDHCI_CTRL3_FCSEL1; + sdhci_writel(host, val, SDHCI_CONTROL3); + + /* + * SELBASECLK[5:4] + * 00/01 = HCLK + * 10 = EPLL + * 11 = XTI or XEXTCLK + */ + ctrl = sdhci_readl(host, SDHCI_CONTROL2); + ctrl &= ~SDHCI_CTRL2_SELBASECLK_MASK(0x3); + ctrl |= SDHCI_CTRL2_SELBASECLK_MASK(0x2); + sdhci_writel(host, ctrl, SDHCI_CONTROL2); +} + +int s5p_sdhci_init(u32 regbase, u32 max_clk, u32 min_clk, u32 quirks) +{ + struct sdhci_host *host = NULL; + host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host)); + if (!host) { + printf("sdhci__host malloc fail!\n"); + return 1; + } + + host->name = S5P_NAME; + host->ioaddr = (void *)regbase; + host->quirks = quirks; + + host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE; + host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; + if (quirks & SDHCI_QUIRK_REG32_RW) + host->version = sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16; + else + host->version = sdhci_readw(host, SDHCI_HOST_VERSION); + + host->set_control_reg = &s5p_sdhci_set_control_reg; + + host->host_caps = MMC_MODE_HC; + + add_sdhci(host, max_clk, min_clk); + return 0; +} |