[U-Boot] [PATCH v6] mmc: gen_atmel_mci: add driver model support for mci
Jaehoon Chung
jh80.chung at samsung.com
Fri Apr 14 06:21:31 UTC 2017
Hi Wenyou,
On 04/13/2017 11:29 AM, Wenyou Yang wrote:
> 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.yang at atmel.com>
Applied to u-boot-mmc with Simon's reviewed-by tags. Thanks!
Best Regards,
Jaehoon Chung
> ---
>
> Changes in v6:
> - Rebase the master branch (commit: 4f6d85bb51).
>
> Changes in v5:
> - Rebase on v2017.03.
>
> Changes in v4:
> - Remove unneeded #ifdef CONFIG_DM_MMC.
>
> Changes in v3:
> - Use unified #ifdef CONFIG_DM_MMC #else...#endif, instead of #ifndef CONFIG_DM_MMC
> #else...#endif.
>
> Changes in v2:
> - Change the return type of atmel_mci_setup_cfg() from int to void.
> - Add comments on the features depends on the IP version.
> - Add the error handle path of clock.
> - Fix the missing use priv->bus_clk_rate.
> - Return from mmc_bind() directly, instead of checking its return.
>
> drivers/mmc/Kconfig | 9 +++
> drivers/mmc/gen_atmel_mci.c | 158 +++++++++++++++++++++++++++++++++++++++++++-
> 2 files changed, 166 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
> index 560391fae2..f285698272 100644
> --- a/drivers/mmc/Kconfig
> +++ b/drivers/mmc/Kconfig
> @@ -365,6 +365,15 @@ config MMC_SUNXI
> This selects support for the SD/MMC Host Controller on
> Allwinner sunxi SoCs.
>
> +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.
> +
> endif
>
> config TEGRA124_MMC_DISABLE_EXT_LOOPBACK
> diff --git a/drivers/mmc/gen_atmel_mci.c b/drivers/mmc/gen_atmel_mci.c
> index 7dc4a5de74..c25d9ed96e 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 */
> @@ -58,11 +66,19 @@ static void dump_cmd(u32 cmdr, u32 arg, u32 status, const char* msg)
> }
>
> /* Setup for MCI Clock and Block Size */
> +#ifdef CONFIG_DM_MMC
> +static void mci_set_mode(struct atmel_mci_priv *priv, u32 hz, u32 blklen)
> +{
> + struct mmc *mmc = &priv->mmc;
> + u32 bus_hz = priv->bus_clk_rate;
> +#else
> static void mci_set_mode(struct mmc *mmc, u32 hz, u32 blklen)
> {
> struct atmel_mci_priv *priv = mmc->priv;
> - atmel_mci_t *mci = priv->mci;
> u32 bus_hz = get_mci_clk_rate();
> +#endif
> +
> + atmel_mci_t *mci = priv->mci;
> u32 clkdiv = 255;
> unsigned int version = atmel_mci_get_version(mci);
> u32 clkodd = 0;
> @@ -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.
> */
> +#ifdef CONFIG_DM_MMC
> +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);
> +#else
> static int
> mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
> {
> struct atmel_mci_priv *priv = mmc->priv;
> +#endif
> atmel_mci_t *mci = priv->mci;
> u32 cmdr;
> u32 error_flags = 0;
> @@ -335,17 +359,28 @@ mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
> return 0;
> }
>
> +#ifdef CONFIG_DM_MMC
> +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);
> +#else
> /* Entered into mmc structure during driver init */
> static int mci_set_ios(struct mmc *mmc)
> {
> struct atmel_mci_priv *priv = mmc->priv;
> +#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 */
> +#ifdef CONFIG_DM_MMC
> + mci_set_mode(priv, mmc->clock, MMC_DEFAULT_BLKLEN);
> +#else
> mci_set_mode(mmc, mmc->clock, MMC_DEFAULT_BLKLEN);
> +#endif
>
> /*
> * set the bus width and select slot for this interface
> @@ -374,10 +409,15 @@ static int mci_set_ios(struct mmc *mmc)
> return 0;
> }
>
> +#ifdef CONFIG_DM_MMC
> +static int atmel_mci_hw_init(struct atmel_mci_priv *priv)
> +{
> +#else
> /* Entered into mmc structure during driver init */
> static int mci_init(struct mmc *mmc)
> {
> struct atmel_mci_priv *priv = mmc->priv;
> +#endif
> atmel_mci_t *mci = priv->mci;
>
> /* Initialize controller */
> @@ -392,11 +432,16 @@ static int mci_init(struct mmc *mmc)
> writel(~0UL, &mci->idr);
>
> /* Set default clocks and blocklen */
> +#ifdef CONFIG_DM_MMC
> + mci_set_mode(priv, CONFIG_SYS_MMC_CLK_OD, MMC_DEFAULT_BLKLEN);
> +#else
> mci_set_mode(mmc, 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,
> @@ -456,3 +501,114 @@ 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 void 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;
> +
> + /*
> + * If the version is above 3.0, the capabilities of the 8-bit
> + * bus width and high speed are supported.
> + */
> + version = atmel_mci_get_version(priv->mci);
> + if ((version & 0xf00) >= 0x300) {
> + cfg->host_caps = MMC_MODE_8BIT |
> + 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 = priv->bus_clk_rate / (2 * 256);
> + cfg->f_max = priv->bus_clk_rate / 2;
> +}
> +
> +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 = 0;
> +
> + ret = clk_get_by_index(dev, 0, &clk);
> + if (ret) {
> + ret = -EINVAL;
> + goto failed;
> + }
> +
> + ret = clk_enable(&clk);
> + if (ret)
> + goto failed;
> +
> + clk_rate = clk_get_rate(&clk);
> + if (!clk_rate) {
> + ret = -EINVAL;
> + goto failed;
> + }
> +
> + priv->bus_clk_rate = clk_rate;
> +
> +failed:
> + clk_free(&clk);
> +
> + return ret;
> +}
> +
> +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);
> +
> + return mmc_bind(dev, &priv->mmc, &priv->cfg);
> +}
> +
> +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
>
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