2 * (C) Copyright 2012 SAMSUNG Electronics
3 * Jaehoon Chung <jh80.chung@samsung.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <asm/arch/mmc.h>
25 static char *S5P_NAME = "SAMSUNG SDHCI";
26 static void s5p_sdhci_set_control_reg(struct sdhci_host *host)
28 unsigned long val, ctrl;
36 sdhci_writel(host, SDHCI_CTRL4_DRIVE_MASK(0x3), SDHCI_CONTROL4);
38 val = sdhci_readl(host, SDHCI_CONTROL2);
39 val &= SDHCI_CTRL2_SELBASECLK_SHIFT;
41 val |= SDHCI_CTRL2_ENSTAASYNCCLR |
42 SDHCI_CTRL2_ENCMDCNFMSK |
43 SDHCI_CTRL2_ENFBCLKRX |
44 SDHCI_CTRL2_ENCLKOUTHOLD;
46 sdhci_writel(host, val, SDHCI_CONTROL2);
49 * FCSEL3[31] FCSEL2[23] FCSEL1[15] FCSEL0[7]
50 * FCSel[1:0] : Rx Feedback Clock Delay Control
51 * Inverter delay means10ns delay if SDCLK 50MHz setting
52 * 01 = Delay1 (basic delay)
53 * 11 = Delay2 (basic delay + 2ns)
54 * 00 = Delay3 (inverter delay)
55 * 10 = Delay4 (inverter delay + 2ns)
57 val = SDHCI_CTRL3_FCSEL3 | SDHCI_CTRL3_FCSEL1;
58 sdhci_writel(host, val, SDHCI_CONTROL3);
66 ctrl = sdhci_readl(host, SDHCI_CONTROL2);
67 ctrl &= ~SDHCI_CTRL2_SELBASECLK_MASK(0x3);
68 ctrl |= SDHCI_CTRL2_SELBASECLK_MASK(0x2);
69 sdhci_writel(host, ctrl, SDHCI_CONTROL2);
72 int s5p_sdhci_init(u32 regbase, u32 max_clk, u32 min_clk, u32 quirks)
74 struct sdhci_host *host = NULL;
75 host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
77 printf("sdhci__host malloc fail!\n");
81 host->name = S5P_NAME;
82 host->ioaddr = (void *)regbase;
83 host->quirks = quirks;
85 host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE;
86 host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
87 if (quirks & SDHCI_QUIRK_REG32_RW)
88 host->version = sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
90 host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
92 host->set_control_reg = &s5p_sdhci_set_control_reg;
94 host->host_caps = MMC_MODE_HC;
96 add_sdhci(host, max_clk, min_clk);