2 * Marvell SD Host Controller Interface
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <linux/mbus.h>
12 #define SDHCI_WINDOW_CTRL(win) (0x4080 + ((win) << 4))
13 #define SDHCI_WINDOW_BASE(win) (0x4084 + ((win) << 4))
15 static void sdhci_mvebu_mbus_config(void __iomem *base)
17 const struct mbus_dram_target_info *dram;
20 dram = mvebu_mbus_dram_info();
22 for (i = 0; i < 4; i++) {
23 writel(0, base + SDHCI_WINDOW_CTRL(i));
24 writel(0, base + SDHCI_WINDOW_BASE(i));
27 for (i = 0; i < dram->num_cs; i++) {
28 const struct mbus_dram_window *cs = dram->cs + i;
30 /* Write size, attributes and target id to control register */
31 writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
32 (dram->mbus_dram_target_id << 4) | 1,
33 base + SDHCI_WINDOW_CTRL(i));
35 /* Write base address to base register */
36 writel(cs->base, base + SDHCI_WINDOW_BASE(i));
40 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
41 static struct sdhci_ops mv_ops;
43 #if defined(CONFIG_SHEEVA_88SV331xV5)
44 #define SD_CE_ATA_2 0xEA
45 #define MMC_CARD 0x1000
46 #define MMC_WIDTH 0x0100
47 static inline void mv_sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
49 struct mmc *mmc = host->mmc;
50 u32 ata = (unsigned long)host->ioaddr + SD_CE_ATA_2;
52 if (!IS_SD(mmc) && reg == SDHCI_HOST_CONTROL) {
53 if (mmc->bus_width == 8)
54 writew(readw(ata) | (MMC_CARD | MMC_WIDTH), ata);
56 writew(readw(ata) & ~(MMC_CARD | MMC_WIDTH), ata);
59 writeb(val, host->ioaddr + reg);
63 #define mv_sdhci_writeb NULL
64 #endif /* CONFIG_SHEEVA_88SV331xV5 */
65 #endif /* CONFIG_MMC_SDHCI_IO_ACCESSORS */
67 static char *MVSDH_NAME = "mv_sdh";
68 int mv_sdh_init(unsigned long regbase, u32 max_clk, u32 min_clk, u32 quirks)
70 struct sdhci_host *host = NULL;
71 host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
73 printf("sdh_host malloc fail!\n");
77 host->name = MVSDH_NAME;
78 host->ioaddr = (void *)regbase;
79 host->quirks = quirks;
80 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
81 memset(&mv_ops, 0, sizeof(struct sdhci_ops));
82 mv_ops.write_b = mv_sdhci_writeb;
86 if (CONFIG_IS_ENABLED(ARCH_MVEBU)) {
87 /* Configure SDHCI MBUS mbus bridge windows */
88 sdhci_mvebu_mbus_config((void __iomem *)regbase);
91 if (quirks & SDHCI_QUIRK_REG32_RW)
92 host->version = sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
94 host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
95 return add_sdhci(host, max_clk, min_clk);