1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Marvell SD Host Controller Interface
4 */
5
6 #include <common.h>
7 #include <malloc.h>
8 #include <sdhci.h>
9 #include <linux/mbus.h>
10
11 #define SDHCI_WINDOW_CTRL(win) (0x4080 + ((win) << 4))
12 #define SDHCI_WINDOW_BASE(win) (0x4084 + ((win) << 4))
13
sdhci_mvebu_mbus_config(void __iomem * base)14 static void sdhci_mvebu_mbus_config(void __iomem *base)
15 {
16 const struct mbus_dram_target_info *dram;
17 int i;
18
19 dram = mvebu_mbus_dram_info();
20
21 for (i = 0; i < 4; i++) {
22 writel(0, base + SDHCI_WINDOW_CTRL(i));
23 writel(0, base + SDHCI_WINDOW_BASE(i));
24 }
25
26 for (i = 0; i < dram->num_cs; i++) {
27 const struct mbus_dram_window *cs = dram->cs + i;
28
29 /* Write size, attributes and target id to control register */
30 writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
31 (dram->mbus_dram_target_id << 4) | 1,
32 base + SDHCI_WINDOW_CTRL(i));
33
34 /* Write base address to base register */
35 writel(cs->base, base + SDHCI_WINDOW_BASE(i));
36 }
37 }
38
39 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
40 static struct sdhci_ops mv_ops;
41
42 #if defined(CONFIG_SHEEVA_88SV331xV5)
43 #define SD_CE_ATA_2 0xEA
44 #define MMC_CARD 0x1000
45 #define MMC_WIDTH 0x0100
mv_sdhci_writeb(struct sdhci_host * host,u8 val,int reg)46 static inline void mv_sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
47 {
48 struct mmc *mmc = host->mmc;
49 u32 ata = (unsigned long)host->ioaddr + SD_CE_ATA_2;
50
51 if (!IS_SD(mmc) && reg == SDHCI_HOST_CONTROL) {
52 if (mmc->bus_width == 8)
53 writew(readw(ata) | (MMC_CARD | MMC_WIDTH), ata);
54 else
55 writew(readw(ata) & ~(MMC_CARD | MMC_WIDTH), ata);
56 }
57
58 writeb(val, host->ioaddr + reg);
59 }
60
61 #else
62 #define mv_sdhci_writeb NULL
63 #endif /* CONFIG_SHEEVA_88SV331xV5 */
64 #endif /* CONFIG_MMC_SDHCI_IO_ACCESSORS */
65
66 static char *MVSDH_NAME = "mv_sdh";
mv_sdh_init(unsigned long regbase,u32 max_clk,u32 min_clk,u32 quirks)67 int mv_sdh_init(unsigned long regbase, u32 max_clk, u32 min_clk, u32 quirks)
68 {
69 struct sdhci_host *host = NULL;
70 host = calloc(1, sizeof(*host));
71 if (!host) {
72 printf("sdh_host malloc fail!\n");
73 return -ENOMEM;
74 }
75
76 host->name = MVSDH_NAME;
77 host->ioaddr = (void *)regbase;
78 host->quirks = quirks;
79 host->max_clk = max_clk;
80 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
81 memset(&mv_ops, 0, sizeof(struct sdhci_ops));
82 mv_ops.write_b = mv_sdhci_writeb;
83 host->ops = &mv_ops;
84 #endif
85
86 if (CONFIG_IS_ENABLED(ARCH_MVEBU)) {
87 /* Configure SDHCI MBUS mbus bridge windows */
88 sdhci_mvebu_mbus_config((void __iomem *)regbase);
89 }
90
91 return add_sdhci(host, 0, min_clk);
92 }
93