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mmc: sdhci: use lower/upper_32_bits() macros for DMA addresses

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Currently, the DMA addresses are casted to (u64) for the upper 32bits
to avoid "right shift count >= width of type" warning.

<linux/kernel.h> provides macros to address this, and I like the macro
names are self-documenting.

I introduced a new helper, sdhci_set_adma_addr() to avoid the code
duplication.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Masahiro Yamada 2019-08-29 20:22:06 +09:00 committed by Ulf Hansson
parent 12a632e60a
commit 38eee2e82c
1 changed files with 13 additions and 14 deletions
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27
drivers/mmc/host/sdhci.c
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@ -668,10 +668,10 @@ void sdhci_adma_write_desc(struct sdhci_host *host, void **desc,
/* 32-bit and 64-bit descriptors have these members in same position */
dma_desc->cmd = cpu_to_le16(cmd);
dma_desc->len = cpu_to_le16(len);
dma_desc->addr_lo = cpu_to_le32((u32)addr);
dma_desc->addr_lo = cpu_to_le32(lower_32_bits(addr));
if (host->flags & SDHCI_USE_64_BIT_DMA)
dma_desc->addr_hi = cpu_to_le32((u64)addr >> 32);
dma_desc->addr_hi = cpu_to_le32(upper_32_bits(addr));
*desc += host->desc_sz;
}
@ -816,6 +816,13 @@ static void sdhci_adma_table_post(struct sdhci_host *host,
}
}
static void sdhci_set_adma_addr(struct sdhci_host *host, dma_addr_t addr)
{
sdhci_writel(host, lower_32_bits(addr), SDHCI_ADMA_ADDRESS);
if (host->flags & SDHCI_USE_64_BIT_DMA)
sdhci_writel(host, upper_32_bits(addr), SDHCI_ADMA_ADDRESS_HI);
}
static dma_addr_t sdhci_sdma_address(struct sdhci_host *host)
{
if (host->bounce_buffer)
@ -826,13 +833,10 @@ static dma_addr_t sdhci_sdma_address(struct sdhci_host *host)
static void sdhci_set_sdma_addr(struct sdhci_host *host, dma_addr_t addr)
{
if (host->v4_mode) {
sdhci_writel(host, addr, SDHCI_ADMA_ADDRESS);
if (host->flags & SDHCI_USE_64_BIT_DMA)
sdhci_writel(host, (u64)addr >> 32, SDHCI_ADMA_ADDRESS_HI);
} else {
if (host->v4_mode)
sdhci_set_adma_addr(host, addr);
else
sdhci_writel(host, addr, SDHCI_DMA_ADDRESS);
}
}
static unsigned int sdhci_target_timeout(struct sdhci_host *host,
@ -1095,12 +1099,7 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
host->flags &= ~SDHCI_REQ_USE_DMA;
} else if (host->flags & SDHCI_USE_ADMA) {
sdhci_adma_table_pre(host, data, sg_cnt);
sdhci_writel(host, host->adma_addr, SDHCI_ADMA_ADDRESS);
if (host->flags & SDHCI_USE_64_BIT_DMA)
sdhci_writel(host,
(u64)host->adma_addr >> 32,
SDHCI_ADMA_ADDRESS_HI);
sdhci_set_adma_addr(host, host->adma_addr);
} else {
WARN_ON(sg_cnt != 1);
sdhci_set_sdma_addr(host, sdhci_sdma_address(host));