1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * (C) Copyright 2009 SAMSUNG Electronics 4 * Minkyu Kang <mk7.kang@samsung.com> 5 * Jaehoon Chung <jh80.chung@samsung.com> 6 * Portions Copyright 2011-2019 NVIDIA Corporation 7 * Portions Copyright 2021 Tianrui Wei 8 * This file is adapted from tegra_mmc.c 9 * Tianrui Wei <tianrui-wei@outlook.com> 10 */ 11 12#include <asm/gpio.h> 13#include <asm/io.h> 14#include <common.h> 15#include <div64.h> 16#include <dm.h> 17#include <errno.h> 18#include <linux/bitops.h> 19#include <linux/delay.h> 20#include <linux/err.h> 21#include <linux/types.h> 22#include <linux/sizes.h> 23#include <log.h> 24#include <mmc.h> 25 26 27#define PITON_MMC_DUMMY_F_MAX 20000000 28#define PITON_MMC_DUMMY_F_MIN 10000000 29#define PITON_MMC_DUMMY_CAPACITY SZ_4G << 3 30#define PITON_MMC_DUMMY_B_MAX SZ_4G 31 32struct piton_mmc_plat { 33 struct mmc_config cfg; 34 struct mmc mmc; 35}; 36 37struct piton_mmc_priv { 38 void __iomem *base_addr; 39}; 40 41static int piton_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, 42 struct mmc_data *data) 43{ 44 if (!data) 45 return 0; 46 47 struct piton_mmc_priv *priv = dev_get_priv(dev); 48 u32 *buff, *start_addr, *write_src; 49 size_t byte_cnt, start_block; 50 51 buff = (u32 *)data->dest; 52 write_src = (u32 *)data->src; 53 start_block = cmd->cmdarg; 54 start_addr = priv->base_addr + start_block; 55 56 /* if there is a read */ 57 for (byte_cnt = data->blocks * data->blocksize; byte_cnt; 58 byte_cnt -= sizeof(u32)) { 59 if (data->flags & MMC_DATA_READ) { 60 *buff++ = readl(start_addr++); 61 } 62 else if (data->flags & MMC_DATA_WRITE) { 63 writel(*write_src++,start_addr++); 64 } 65 } 66 return 0; 67} 68 69static int piton_mmc_ofdata_to_platdata(struct udevice *dev) 70{ 71 struct piton_mmc_priv *priv = dev_get_priv(dev); 72 struct piton_mmc_plat *plat = dev_get_plat(dev); 73 struct mmc_config *cfg; 74 struct mmc *mmc; 75 struct blk_desc *bdesc; 76 77 priv->base_addr = dev_read_addr_ptr(dev); 78 cfg = &plat->cfg; 79 cfg->name = "PITON MMC"; 80 cfg->host_caps = MMC_MODE_8BIT; 81 cfg->f_max = PITON_MMC_DUMMY_F_MAX; 82 cfg->f_min = PITON_MMC_DUMMY_F_MIN; 83 cfg->voltages = MMC_VDD_21_22; 84 85 mmc = &plat->mmc; 86 mmc->read_bl_len = MMC_MAX_BLOCK_LEN; 87 mmc->capacity_user = PITON_MMC_DUMMY_CAPACITY; 88 mmc->capacity_user *= mmc->read_bl_len; 89 mmc->capacity_boot = 0; 90 mmc->capacity_rpmb = 0; 91 for (int i = 0; i < 4; i++) 92 mmc->capacity_gp[i] = 0; 93 mmc->capacity = PITON_MMC_DUMMY_CAPACITY; 94 mmc->has_init = 1; 95 96 bdesc = mmc_get_blk_desc(mmc); 97 bdesc->lun = 0; 98 bdesc->hwpart = 0; 99 bdesc->type = 0; 100 bdesc->blksz = mmc->read_bl_len; 101 bdesc->log2blksz = LOG2(bdesc->blksz); 102 bdesc->lba = lldiv(mmc->capacity, mmc->read_bl_len); 103 104 return 0; 105} 106 107static int piton_mmc_getcd(struct udevice *dev) 108{ 109 return 1; 110} 111 112static const struct dm_mmc_ops piton_mmc_ops = { 113 .send_cmd = piton_mmc_send_cmd, 114 .get_cd = piton_mmc_getcd, 115}; 116 117static int piton_mmc_probe(struct udevice *dev) 118{ 119 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); 120 struct piton_mmc_plat *plat = dev_get_plat(dev); 121 struct mmc_config *cfg = &plat->cfg; 122 123 cfg->name = dev->name; 124 upriv->mmc = &plat->mmc; 125 upriv->mmc->has_init = 1; 126 upriv->mmc->capacity = PITON_MMC_DUMMY_CAPACITY; 127 upriv->mmc->read_bl_len = MMC_MAX_BLOCK_LEN; 128 return 0; 129} 130 131static int piton_mmc_bind(struct udevice *dev) 132{ 133 struct piton_mmc_plat *plat = dev_get_plat(dev); 134 struct mmc_config *cfg = &plat->cfg; 135 136 cfg->name = dev->name; 137 cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_8BIT; 138 cfg->voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34; 139 cfg->f_min = PITON_MMC_DUMMY_F_MIN; 140 cfg->f_max = PITON_MMC_DUMMY_F_MAX; 141 cfg->b_max = MMC_MAX_BLOCK_LEN; 142 143 return mmc_bind(dev, &plat->mmc, cfg); 144} 145 146static const struct udevice_id piton_mmc_ids[] = { 147 {.compatible = "openpiton,piton-mmc"}, 148 {/* sentinel */} 149}; 150 151U_BOOT_DRIVER(piton_mmc_drv) = { 152 .name = "piton_mmc", 153 .id = UCLASS_MMC, 154 .of_match = piton_mmc_ids, 155 .of_to_plat = piton_mmc_ofdata_to_platdata, 156 .bind = piton_mmc_bind, 157 .probe = piton_mmc_probe, 158 .ops = &piton_mmc_ops, 159 .plat_auto = sizeof(struct piton_mmc_plat), 160 .priv_auto = sizeof(struct piton_mmc_priv), 161}; 162