mmc: sdhci: introduce adma_write_desc() hook to struct sdhci_ops
Add this hook so that it can be overridden with driver specific
implementations. We also let the original sdhci_adma_write_desc()
accept &desc so that the function can set its new value. Then export
the function so that it could be reused by driver's specific
implementations.
The above is a port of Linux kernel commit 54552e4948cbf
In addition, allow drivers to allocate their own ADMA descriptor
tables if additional space is required.
Finally, fix the assignment of adma_addr to fix compiler warning
on 64-bit platforms that still use 32-bit DMA addressing.
Co-developed-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
Co-developed-by: Greg Malysa <greg.malysa@timesys.com>
Signed-off-by: Greg Malysa <greg.malysa@timesys.com>
Signed-off-by: Ian Roberts <ian.roberts@timesys.com>
diff --git a/include/sdhci.h b/include/sdhci.h
index a1b74e3..d73a725 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -291,6 +291,11 @@
* Return: 0 if successful, -ve on error
*/
int (*set_enhanced_strobe)(struct sdhci_host *host);
+
+#ifdef CONFIG_MMC_SDHCI_ADMA_HELPERS
+ void (*adma_write_desc)(struct sdhci_host *host, void **desc,
+ dma_addr_t addr, int len, bool end);
+#endif
};
#define ADMA_MAX_LEN 65532
@@ -526,8 +531,11 @@
#else
#endif
+void sdhci_adma_write_desc(struct sdhci_host *host, void **next_desc,
+ dma_addr_t addr, int len, bool end);
struct sdhci_adma_desc *sdhci_adma_init(void);
-void sdhci_prepare_adma_table(struct sdhci_adma_desc *table,
- struct mmc_data *data, dma_addr_t addr);
+void sdhci_prepare_adma_table(struct sdhci_host *host,
+ struct sdhci_adma_desc *table,
+ struct mmc_data *data, dma_addr_t start_addr);
#endif /* __SDHCI_HW_H */