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mmc: dw_mmc: Add fifo address property

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The FIFO address may break default address assumption of 0x100
(version < 0x240A) and 0x200(version >= 0x240A) in current driver.
The new property is introduced to override fifo address via DT
node information.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Jun Nie 2017-01-11 15:35:35 +09:00 committed by Ulf Hansson
parent 4a80f77618
commit a0361c1a4d
2 changed files with 7 additions and 1 deletions
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6
drivers/mmc/host/dw_mmc.c
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@ -2976,6 +2976,8 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms);
of_property_read_u32(np, "data-addr", &host->data_addr_override);
if (!of_property_read_u32(np, "clock-frequency", &clock_frequency))
pdata->bus_hz = clock_frequency;
@ -3179,7 +3181,9 @@ int dw_mci_probe(struct dw_mci *host)
host->verid = SDMMC_GET_VERID(mci_readl(host, VERID));
dev_info(host->dev, "Version ID is %04x\n", host->verid);
if (host->verid < DW_MMC_240A)
if (host->data_addr_override)
host->fifo_reg = host->regs + host->data_addr_override;
else if (host->verid < DW_MMC_240A)
host->fifo_reg = host->regs + DATA_OFFSET;
else
host->fifo_reg = host->regs + DATA_240A_OFFSET;

2
drivers/mmc/host/dw_mmc.h
View File

@ -114,6 +114,7 @@ struct dw_mci_dma_slave {
* @ciu_clk: Pointer to card interface unit clock instance.
* @slot: Slots sharing this MMC controller.
* @fifo_depth: depth of FIFO.
* @data_addr_override: override fifo reg offset with this value.
* @data_shift: log2 of FIFO item size.
* @part_buf_start: Start index in part_buf.
* @part_buf_count: Bytes of partial data in part_buf.
@ -161,6 +162,7 @@ struct dw_mci {
spinlock_t irq_lock;
void __iomem *regs;
void __iomem *fifo_reg;
u32 data_addr_override;
struct scatterlist *sg;
struct sg_mapping_iter sg_miter;