uboot-phytec
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// SPDX-License-Identifier: GPL-2.0+/* * Freescale i.MX28 SSP MMC driver * * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com> * on behalf of DENX Software Engineering GmbH * * Based on code from LTIB: * (C) Copyright 2008-2010 Freescale Semiconductor, Inc. * Terry Lv * * Copyright 2007, Freescale Semiconductor, Inc * Andy Fleming * * Based vaguely on the pxa mmc code: * (C) Copyright 2003 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net */struct mxsmmc_priv { int id; struct mxs_ssp_regs *regs; uint32_t buswidth; int (*mmc_is_wp)(int); int (*mmc_cd)(int); struct mxs_dma_desc *desc; struct mmc_config cfg; /* mmc configuration */};static int mxsmmc_cd(struct mxsmmc_priv *priv){ struct mxs_ssp_regs *ssp_regs = priv->regs; if (priv->mmc_cd) return priv->mmc_cd(priv->id); return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);}static int mxsmmc_send_cmd_pio(struct mxsmmc_priv *priv, struct mmc_data *data){ struct mxs_ssp_regs *ssp_regs = priv->regs; uint32_t *data_ptr; int timeout = MXSMMC_MAX_TIMEOUT; uint32_t reg; uint32_t data_count = data->blocksize * data->blocks; if (data->flags & MMC_DATA_READ) { data_ptr = (uint32_t *)data->dest; while (data_count && --timeout) { reg = readl(&ssp_regs->hw_ssp_status); if (!(reg & SSP_STATUS_FIFO_EMPTY)) { *data_ptr++ = readl(&ssp_regs->hw_ssp_data); data_count -= 4; timeout = MXSMMC_MAX_TIMEOUT; } else udelay(1000); } } else { data_ptr = (uint32_t *)data->src; timeout *= 100; while (data_count && --timeout) { reg = readl(&ssp_regs->hw_ssp_status); if (!(reg & SSP_STATUS_FIFO_FULL)) { writel(*data_ptr++, &ssp_regs->hw_ssp_data); data_count -= 4; timeout = MXSMMC_MAX_TIMEOUT; } else udelay(1000); } } return timeout ? 0 : -ECOMM;}static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data){ uint32_t data_count = data->blocksize * data->blocks; int dmach;