Add the driver model support for Atmel mci while retaining the
existing legacy code. This allows the driver to support boards
that have converted to driver model as well as those that have not.

Signed-off-by: Wenyou Yang <wenyou.y...@atmel.com>
---

 drivers/mmc/Kconfig         |   9 +++
 drivers/mmc/gen_atmel_mci.c | 160 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 169 insertions(+)

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index a71afa5..e56eb94 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -44,6 +44,15 @@ config ATMEL_SDHCI
          It is compliant with the SD Host Controller Standard V3.0
          specification.
 
+config GENERIC_ATMEL_MCI
+       bool "Atmel Multimedia Card Interface support"
+       depends on DM_MMC && BLK && DM_MMC_OPS && ARCH_AT91
+       help
+         This enables support for Atmel High Speed Multimedia Card Interface
+         (HSMCI), which supports the MultiMedia Card (MMC) Specification V4.3,
+         the SD Memory Card Specification V2.0, the SDIO V2.0 specification
+         and CE-ATA V1.1.
+
 config ROCKCHIP_DWMMC
        bool "Rockchip SD/MMC controller support"
        depends on DM_MMC && OF_CONTROL
diff --git a/drivers/mmc/gen_atmel_mci.c b/drivers/mmc/gen_atmel_mci.c
index 69770df..3ebc998 100644
--- a/drivers/mmc/gen_atmel_mci.c
+++ b/drivers/mmc/gen_atmel_mci.c
@@ -10,6 +10,7 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <mmc.h>
 #include <part.h>
 #include <malloc.h>
@@ -18,8 +19,11 @@
 #include <asm/byteorder.h>
 #include <asm/arch/clk.h>
 #include <asm/arch/hardware.h>
+#include <dm/device.h>
 #include "atmel_mci.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
 #ifndef CONFIG_SYS_MMC_CLK_OD
 # define CONFIG_SYS_MMC_CLK_OD 150000
 #endif
@@ -37,6 +41,10 @@ struct atmel_mci_priv {
        struct atmel_mci        *mci;
        unsigned int            initialized:1;
        unsigned int            curr_clk;
+#ifdef CONFIG_DM_MMC
+       struct mmc      mmc;
+       ulong           bus_clk_rate;
+#endif
 };
 
 /* Read Atmel MCI IP version */
@@ -57,10 +65,18 @@ static void dump_cmd(u32 cmdr, u32 arg, u32 status, const 
char* msg)
              cmdr, cmdr & 0x3F, arg, status, msg);
 }
 
+#ifndef CONFIG_DM_MMC
 /* Setup for MCI Clock and Block Size */
 static void mci_set_mode(struct mmc *mmc, u32 hz, u32 blklen)
 {
        struct atmel_mci_priv *priv = mmc->priv;
+#else
+static void mci_set_mode(struct atmel_mci_priv *priv, u32 hz, u32 blklen)
+{
+       struct mmc *mmc = &priv->mmc;
+
+#endif
+
        atmel_mci_t *mci = priv->mci;
        u32 bus_hz = get_mci_clk_rate();
        u32 clkdiv = 255;
@@ -202,10 +218,18 @@ io_fail:
  * Sends a command out on the bus and deals with the block data.
  * Takes the mmc pointer, a command pointer, and an optional data pointer.
  */
+#ifndef CONFIG_DM_MMC
 static int
 mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 {
        struct atmel_mci_priv *priv = mmc->priv;
+#else
+static int atmel_mci_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
+                             struct mmc_data *data)
+{
+       struct atmel_mci_priv *priv = dev_get_priv(dev);
+       struct mmc *mmc = mmc_get_mmc_dev(dev);
+#endif
        atmel_mci_t *mci = priv->mci;
        u32 cmdr;
        u32 error_flags = 0;
@@ -335,17 +359,29 @@ mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct 
mmc_data *data)
        return 0;
 }
 
+#ifndef CONFIG_DM_MMC
 /* Entered into mmc structure during driver init */
 static void mci_set_ios(struct mmc *mmc)
 {
        struct atmel_mci_priv *priv = mmc->priv;
+#else
+static int atmel_mci_set_ios(struct udevice *dev)
+{
+       struct atmel_mci_priv *priv = dev_get_priv(dev);
+       struct mmc *mmc = mmc_get_mmc_dev(dev);
+#endif
+
        atmel_mci_t *mci = priv->mci;
        int bus_width = mmc->bus_width;
        unsigned int version = atmel_mci_get_version(mci);
        int busw;
 
        /* Set the clock speed */
+#ifndef CONFIG_DM_MMC
        mci_set_mode(mmc, mmc->clock, MMC_DEFAULT_BLKLEN);
+#else
+       mci_set_mode(priv, mmc->clock, MMC_DEFAULT_BLKLEN);
+#endif
 
        /*
         * set the bus width and select slot for this interface
@@ -370,12 +406,22 @@ static void mci_set_ios(struct mmc *mmc)
 
                writel(busw << 7 | MMCI_BF(SCDSEL, MCI_BUS), &mci->sdcr);
        }
+
+#ifdef CONFIG_DM_MMC
+       return 0;
+#endif
 }
 
+
+#ifndef CONFIG_DM_MMC
 /* Entered into mmc structure during driver init */
 static int mci_init(struct mmc *mmc)
 {
        struct atmel_mci_priv *priv = mmc->priv;
+#else
+static int atmel_mci_hw_init(struct atmel_mci_priv *priv)
+{
+#endif
        atmel_mci_t *mci = priv->mci;
 
        /* Initialize controller */
@@ -390,11 +436,16 @@ static int mci_init(struct mmc *mmc)
        writel(~0UL, &mci->idr);
 
        /* Set default clocks and blocklen */
+#ifndef CONFIG_DM_MMC
        mci_set_mode(mmc, CONFIG_SYS_MMC_CLK_OD, MMC_DEFAULT_BLKLEN);
+#else
+       mci_set_mode(priv, CONFIG_SYS_MMC_CLK_OD, MMC_DEFAULT_BLKLEN);
+#endif
 
        return 0;
 }
 
+#ifndef CONFIG_DM_MMC
 static const struct mmc_ops atmel_mci_ops = {
        .send_cmd       = mci_send_cmd,
        .set_ios        = mci_set_ios,
@@ -454,3 +505,112 @@ int atmel_mci_init(void *regs)
 
        return 0;
 }
+#endif
+
+#ifdef CONFIG_DM_MMC
+static const struct dm_mmc_ops atmel_mci_mmc_ops = {
+       .send_cmd = atmel_mci_send_cmd,
+       .set_ios = atmel_mci_set_ios,
+};
+
+static int atmel_mci_setup_cfg(struct atmel_mci_priv *priv)
+{
+       struct mmc_config *cfg;
+       u32 version;
+
+       cfg = &priv->cfg;
+       cfg->name = "Atmel mci";
+       cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
+
+       version = atmel_mci_get_version(priv->mci);
+       if ((version & 0xf00) >= 0x300) {
+               cfg->host_caps = MMC_MODE_8BIT;
+               cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
+       }
+
+       cfg->host_caps |= MMC_MODE_4BIT;
+       cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
+       cfg->f_min = get_mci_clk_rate() / (2 * 256);
+       cfg->f_max = get_mci_clk_rate() / (2 * 1);
+
+       return 0;
+}
+
+static int atmel_mci_enable_clk(struct udevice *dev)
+{
+       struct atmel_mci_priv *priv = dev_get_priv(dev);
+       struct clk clk;
+       ulong clk_rate;
+       int ret;
+
+       ret = clk_get_by_index(dev, 0, &clk);
+       if (ret)
+               return -EINVAL;
+
+       ret = clk_enable(&clk);
+       if (ret)
+               return ret;
+
+       clk_rate = clk_get_rate(&clk);
+       if (!clk_rate)
+               return -EINVAL;
+
+       priv->bus_clk_rate = clk_rate;
+
+       clk_free(&clk);
+
+       return 0;
+}
+
+static int atmel_mci_probe(struct udevice *dev)
+{
+       struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+       struct atmel_mci_priv *priv = dev_get_priv(dev);
+       struct mmc *mmc;
+       int ret;
+
+       ret = atmel_mci_enable_clk(dev);
+       if (ret)
+               return ret;
+
+       priv->mci = (struct atmel_mci *)dev_get_addr_ptr(dev);
+
+       atmel_mci_setup_cfg(priv);
+
+       mmc = &priv->mmc;
+       mmc->cfg = &priv->cfg;
+       mmc->dev = dev;
+       upriv->mmc = mmc;
+
+       atmel_mci_hw_init(priv);
+
+       return 0;
+}
+
+static int atmel_mci_bind(struct udevice *dev)
+{
+       struct atmel_mci_priv *priv = dev_get_priv(dev);
+       int ret;
+
+       ret = mmc_bind(dev, &priv->mmc, &priv->cfg);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
+static const struct udevice_id atmel_mci_ids[] = {
+       { .compatible = "atmel,hsmci" },
+       { }
+};
+
+U_BOOT_DRIVER(atmel_mci) = {
+       .name = "atmel-mci",
+       .id = UCLASS_MMC,
+       .of_match = atmel_mci_ids,
+       .bind = atmel_mci_bind,
+       .probe = atmel_mci_probe,
+       .priv_auto_alloc_size = sizeof(struct atmel_mci_priv),
+       .ops = &atmel_mci_mmc_ops,
+};
+#endif
-- 
2.7.4

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