On 6/30/21 8:10 PM, Tianrui Wei wrote:
This commit adds support to piton_mmc driver for OpenPiton-riscv64 This driver has many things set as preconfigured because the hardware automatically configures most of the settings during startup.
Signed-off-by: Tianrui Wei tianrui-wei@outlook.com Signed-off-by: Jonathan Balkind jbalkind@ucsb.edu
Reviewed-by: Jaehoon Chung jh80.chung@samsung.com
Best Regards, Jaehoon Chung
drivers/mmc/Kconfig | 9 +++ drivers/mmc/Makefile | 1 + drivers/mmc/piton_mmc.c | 161 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 171 insertions(+) create mode 100644 drivers/mmc/piton_mmc.c
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 0909f502a1..d0176175e8 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -727,6 +727,15 @@ config MMC_SUNXI_HAS_MODE_SWITCH bool depends on MMC_SUNXI
+config MMC_PITON
- bool "MMC support for OpenPiton SoC"
- depends on DM_MMC && BLK
- help
This selects support for the SD host controller on OpenPiton SoC.Note that this SD controller directly exposes the contents of theSD card as memory mapped, so there is no manual configurationrequiredconfig GENERIC_ATMEL_MCI bool "Atmel Multimedia Card Interface support" depends on DM_MMC && BLK && ARCH_AT91 diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index 89d6af3db3..d96ac90719 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -72,6 +72,7 @@ obj-$(CONFIG_MMC_SDHCI_XENON) += xenon_sdhci.o obj-$(CONFIG_MMC_SDHCI_ZYNQ) += zynq_sdhci.o
obj-$(CONFIG_MMC_SUNXI) += sunxi_mmc.o +obj-$(CONFIG_MMC_PITON) += piton_mmc.o obj-$(CONFIG_MMC_UNIPHIER) += tmio-common.o uniphier-sd.o obj-$(CONFIG_RENESAS_SDHI) += tmio-common.o renesas-sdhi.o obj-$(CONFIG_MMC_BCM2835) += bcm2835_sdhost.o diff --git a/drivers/mmc/piton_mmc.c b/drivers/mmc/piton_mmc.c new file mode 100644 index 0000000000..9f5da6d633 --- /dev/null +++ b/drivers/mmc/piton_mmc.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*
- (C) Copyright 2009 SAMSUNG Electronics
- Minkyu Kang mk7.kang@samsung.com
- Jaehoon Chung jh80.chung@samsung.com
- Portions Copyright 2011-2019 NVIDIA Corporation
- Portions Copyright 2021 Tianrui Wei
- This file is adapted from tegra_mmc.c
- Tianrui Wei tianrui-wei@outlook.com
- */
+#include <asm/gpio.h> +#include <asm/io.h> +#include <common.h> +#include <div64.h> +#include <dm.h> +#include <errno.h> +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/types.h> +#include <linux/sizes.h> +#include <log.h> +#include <mmc.h>
+#define PITON_MMC_DUMMY_F_MAX 20000000 +#define PITON_MMC_DUMMY_F_MIN 10000000 +#define PITON_MMC_DUMMY_CAPACITY SZ_4G << 3 +#define PITON_MMC_DUMMY_B_MAX SZ_4G
+struct piton_mmc_plat {
- struct mmc_config cfg;
- struct mmc mmc;
+};
+struct piton_mmc_priv {
- void __iomem *base_addr;
+};
+static int piton_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)+{
- if (!data)
return 0;- struct piton_mmc_priv *priv = dev_get_priv(dev);
- u32 *buff, *start_addr, *write_src;
- size_t byte_cnt, start_block;
- buff = (u32 *)data->dest;
- write_src = (u32 *)data->src;
- start_block = cmd->cmdarg;
- start_addr = priv->base_addr + start_block;
- /* if there is a read */
- for (byte_cnt = data->blocks * data->blocksize; byte_cnt;
byte_cnt -= sizeof(u32)) {if (data->flags & MMC_DATA_READ) {*buff++ = readl(start_addr++);}else if (data->flags & MMC_DATA_WRITE) {writel(*write_src++,start_addr++);}- }
- return 0;
+}
+static int piton_mmc_ofdata_to_platdata(struct udevice *dev) +{
- struct piton_mmc_priv *priv = dev_get_priv(dev);
- struct piton_mmc_plat *plat = dev_get_plat(dev);
- struct mmc_config *cfg;
- struct mmc *mmc;
- struct blk_desc *bdesc;
- priv->base_addr = (void *)dev_read_addr(dev);
- cfg = &plat->cfg;
- cfg->name = "PITON MMC";
- cfg->host_caps = MMC_MODE_8BIT;
- cfg->f_max = PITON_MMC_DUMMY_F_MAX;
- cfg->f_min = PITON_MMC_DUMMY_F_MIN;
- cfg->voltages = MMC_VDD_21_22;
- mmc = &plat->mmc;
- mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
- mmc->capacity_user = PITON_MMC_DUMMY_CAPACITY;
- mmc->capacity_user *= mmc->read_bl_len;
- mmc->capacity_boot = 0;
- mmc->capacity_rpmb = 0;
- for (int i = 0; i < 4; i++)
mmc->capacity_gp[i] = 0;- mmc->capacity = PITON_MMC_DUMMY_CAPACITY;
- mmc->has_init = 1;
- bdesc = mmc_get_blk_desc(mmc);
- bdesc->lun = 0;
- bdesc->hwpart = 0;
- bdesc->type = 0;
- bdesc->blksz = mmc->read_bl_len;
- bdesc->log2blksz = LOG2(bdesc->blksz);
- bdesc->lba = lldiv(mmc->capacity, mmc->read_bl_len);
- return 0;
+}
+static int piton_mmc_getcd(struct udevice *dev) +{
- return 1;
+}
+static const struct dm_mmc_ops piton_mmc_ops = {
- .send_cmd = piton_mmc_send_cmd,
- .get_cd = piton_mmc_getcd,
+};
+static int piton_mmc_probe(struct udevice *dev) +{
- struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
- struct piton_mmc_plat *plat = dev_get_plat(dev);
- struct mmc_config *cfg = &plat->cfg;
- cfg->name = dev->name;
- upriv->mmc = &plat->mmc;
- upriv->mmc->has_init = 1;
- upriv->mmc->capacity = PITON_MMC_DUMMY_CAPACITY;
- upriv->mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
- return 0;
+}
+static int piton_mmc_bind(struct udevice *dev) +{
- struct piton_mmc_plat *plat = dev_get_plat(dev);
- struct mmc_config *cfg = &plat->cfg;
- cfg->name = dev->name;
- cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_8BIT;
- cfg->voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
- cfg->f_min = PITON_MMC_DUMMY_F_MIN;
- cfg->f_max = PITON_MMC_DUMMY_F_MAX;
- cfg->b_max = MMC_MAX_BLOCK_LEN;
- return mmc_bind(dev, &plat->mmc, cfg);
+}
+static const struct udevice_id piton_mmc_ids[] = {
- {.compatible = "openpiton,piton-mmc"},
- {/* sentinel */}
+};
+U_BOOT_DRIVER(piton_mmc_drv) = {
- .name = "piton_mmc",
- .id = UCLASS_MMC,
- .of_match = piton_mmc_ids,
- .of_to_plat = piton_mmc_ofdata_to_platdata,
- .bind = piton_mmc_bind,
- .probe = piton_mmc_probe,
- .ops = &piton_mmc_ops,
- .plat_auto = sizeof(struct piton_mmc_plat),
- .priv_auto = sizeof(struct piton_mmc_priv),
+};