LXR uboot/drivers/mmc/mv

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