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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* SDHCI ADMA2 helper functions.
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <sdhci.h>
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#include <malloc.h>
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#include <asm/cache.h>
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void sdhci_adma_write_desc(struct sdhci_host *host, void **next_desc,
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dma_addr_t addr, int len, bool end)
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{
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struct sdhci_adma_desc *desc = *next_desc;
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u8 attr;
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attr = ADMA_DESC_ATTR_VALID | ADMA_DESC_TRANSFER_DATA;
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if (end)
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attr |= ADMA_DESC_ATTR_END;
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desc->attr = attr;
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desc->len = len & 0xffff;
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desc->reserved = 0;
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desc->addr_lo = lower_32_bits(addr);
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#ifdef CONFIG_MMC_SDHCI_ADMA_64BIT
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desc->addr_hi = upper_32_bits(addr);
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#endif
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*next_desc += ADMA_DESC_LEN;
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}
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static inline void __sdhci_adma_write_desc(struct sdhci_host *host,
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void **desc, dma_addr_t addr,
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int len, bool end)
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{
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if (host && host->ops && host->ops->adma_write_desc)
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host->ops->adma_write_desc(host, desc, addr, len, end);
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else
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sdhci_adma_write_desc(host, desc, addr, len, end);
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}
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/**
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* sdhci_prepare_adma_table() - Populate the ADMA table
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*
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* @host: Pointer to the sdhci_host
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* @table: Pointer to the ADMA table
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* @data: Pointer to MMC data
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* @addr: DMA address to write to or read from
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*
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* Fill the ADMA table according to the MMC data to read from or write to the
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* given DMA address.
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* Please note, that the table size depends on CONFIG_SYS_MMC_MAX_BLK_COUNT and
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* we don't have to check for overflow.
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*/
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void sdhci_prepare_adma_table(struct sdhci_host *host,
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struct sdhci_adma_desc *table,
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struct mmc_data *data, dma_addr_t start_addr)
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{
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dma_addr_t addr = start_addr;
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uint trans_bytes = data->blocksize * data->blocks;
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void *next_desc = table;
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int i = DIV_ROUND_UP(trans_bytes, ADMA_MAX_LEN);
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while (--i) {
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__sdhci_adma_write_desc(host, &next_desc, addr,
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ADMA_MAX_LEN, false);
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addr += ADMA_MAX_LEN;
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trans_bytes -= ADMA_MAX_LEN;
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}
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__sdhci_adma_write_desc(host, &next_desc, addr, trans_bytes, true);
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flush_cache((phys_addr_t)table,
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ROUND(next_desc - (void *)table,
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ARCH_DMA_MINALIGN));
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}
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/**
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* sdhci_adma_init() - initialize the ADMA descriptor table
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*
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* Return: pointer to the allocated descriptor table or NULL in case of an
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* error.
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*/
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struct sdhci_adma_desc *sdhci_adma_init(void)
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{
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return memalign(ARCH_DMA_MINALIGN, ADMA_TABLE_SZ);
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}
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