From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaehoon Chung Date: Tue, 27 Apr 2021 07:11:30 +0900 Subject: [PATCH V3 1/2] mmc: add OpenPiton mmc support In-Reply-To: References: Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Tianrui, On 4/26/21 12:31 PM, Tianrui Wei wrote: > This patch adds mmc support for OpenPiton. > Specifically, some dts bindings were not used because > our mmc controller doens't have those configuration > options, it only exposes a dummy mmap interface for > CPU. Befere sending patch, how about run checkpatch.pl? There is checkpatch.pl under scripts directory. Best Regards, Jaehoon Chung > > Signed-off-by: Tianrui Wei > Signed-off-by: Jonathan Balkind > > > --- > > drivers/mmc/Kconfig | 6 + > drivers/mmc/Makefile | 1 + > drivers/mmc/piton_mmc.c | 171 +++++ > 3 files changed, 178 insertions(+) > create mode 100644 drivers/mmc/piton_mmc.c > > diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig > index 14d79139..41822c39 100644 > --- a/drivers/mmc/Kconfig > +++ b/drivers/mmc/Kconfig > @@ -707,6 +707,12 @@ 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 driver enables sd card support in U-Boot port for openpiton > + > config 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 1c849cba..698dfe05 100644 > --- a/drivers/mmc/Makefile > +++ b/drivers/mmc/Makefile > @@ -71,6 +71,7 @@ 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 00000000..b550a762 > --- /dev/null > +++ b/drivers/mmc/piton_mmc.c > @@ -0,0 +1,171 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * (C) Copyright 2009 SAMSUNG Electronics > + * Minkyu Kang > + * Jaehoon Chung > + * Portions Copyright 2011-2019 NVIDIA Corporation > + * Portions Copyright 2021 Tianrui Wei > + * Tianrui Wei > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +struct piton_mmc_plat { > + struct mmc_config cfg; > + struct mmc mmc; > +}; > + > +struct piton_mmc_priv { > + u64 piton_mmc_base_addr; /* peripheral id */ > +}; > + > +/* > + * see mmc_read_blocks to see how it is used. > + * start block is hidden at cmd->arg > + * also, initialize the block size at init > + */ > +static int piton_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, > + struct mmc_data *data) > +{ > + /* check first if this is a pure command */ > + if (data == NULL) { > + return 0; > + } > + > + u64 byte_cnt = data->blocks * data->blocksize; > + u64 start_block = cmd->cmdarg; > + unsigned *buff = (unsigned int *) data->dest; > + > + struct piton_mmc_priv *priv = dev_get_priv(dev); > + u64 start_addr = priv->piton_mmc_base_addr + (start_block); > + > + /* if there is a read */ > + if (data->flags & MMC_DATA_READ) { > + for (u64 i = 0; i < byte_cnt; i += 4) { > + *(buff) = readl((void *)(start_addr + i)); > + buff++; > + } > + } else { > + /* else there is a write > + * we don't handle write, so error right away > + */ > + return -ENODEV; > + } > + > + 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_platdata(dev); > + struct mmc_config *cfg; > + struct mmc *mmc; > + /* fill in device description */ > + struct blk_desc *bdesc; > + > + priv->piton_mmc_base_addr = dev_read_addr(dev); > + cfg = &plat->cfg; > + cfg->name = "PITON MMC"; > + cfg->host_caps = MMC_MODE_8BIT; > + cfg->f_max = 100000; > + cfg->f_min = 400000; > + cfg->voltages = MMC_VDD_21_22; > + > + mmc = &plat->mmc; > + mmc->read_bl_len = MMC_MAX_BLOCK_LEN; > + mmc->capacity_user = 0x100000000; > + 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 = 0x2000000000ULL; > + 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; > +} > + > + > +/* test if piton has the micro mmc card present > + * always return 1, which means present > + */ > +static int piton_mmc_getcd(struct udevice *dev) { > + /* > + * always return 1 > + */ > + return 1; > +} > + > +/* dummy function, piton_mmc don't need initialization in hw*/ > +static const struct dm_mmc_ops piton_mmc_ops = { > + .send_cmd = piton_mmc_send_cmd, > + .set_ios = piton_mmc_set_ios, > + .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_platdata(dev); > + struct mmc_config *cfg = &plat->cfg; > + > + cfg->name = dev->name; > + upriv->mmc = &plat->mmc; > + upriv->mmc->has_init = 1; > + upriv->mmc->capacity = 0x2000000000ULL; > + 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_platdata(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 = 1000000; > + cfg->f_max = 52000000; > + cfg->b_max = U32_MAX; > + > + 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, > + .ofdata_to_platdata = piton_mmc_ofdata_to_platdata, > + .bind = piton_mmc_bind, > + .probe = piton_mmc_probe, > + .ops = &piton_mmc_ops, > + .platdata_auto_alloc_size = sizeof(struct piton_mmc_plat), > + .priv_auto_alloc_size = sizeof(struct piton_mmc_priv), > +}; >