| Message ID | 1438234483-3738-10-git-send-email-vigneshr@ti.com |
|---|---|
| State | Superseded |
| Delegated to: | Jagannadha Sutradharudu Teki |
| Headers | show |
On 30 July 2015 at 11:04, Vignesh R <vigneshr@ti.com> wrote: > ti_qspi uses memory map mode for faster read. Enabling DMA will increase > read speed by 3x @48MHz on DRA74 EVM. > > Signed-off-by: Vignesh R <vigneshr@ti.com> Reviewed-by: Jagan Teki <jteki@openedev.com> > --- > drivers/spi/ti_qspi.c | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/drivers/spi/ti_qspi.c b/drivers/spi/ti_qspi.c > index 3356c0f072e5..753d68980bd6 100644 > --- a/drivers/spi/ti_qspi.c > +++ b/drivers/spi/ti_qspi.c > @@ -13,6 +13,8 @@ > #include <spi.h> > #include <asm/gpio.h> > #include <asm/omap_gpio.h> > +#include <asm/omap_common.h> > +#include <asm/ti-common/ti-edma3.h> > > /* ti qpsi register bit masks */ > #define QSPI_TIMEOUT 2000000 > @@ -347,3 +349,24 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, > > return 0; > } > +#ifdef CONFIG_TI_EDMA3 Add below comment /* TODO: control from sf layer to here through dm-spi */ > +void spi_flash_copy_mmap(void *data, void *offset, size_t len) > +{ > + unsigned int addr = (unsigned int) (data); > + unsigned int edma_slot_num = 1; > + > + /* Invalidate the area, so no writeback into the RAM races with DMA */ > + invalidate_dcache_range(addr, addr + roundup(len, ARCH_DMA_MINALIGN)); > + > + /* enable edma3 clocks */ > + enable_edma3_clocks(); > + > + /* Call edma3 api to do actual DMA transfer */ > + edma3_transfer(EDMA3_BASE, edma_slot_num, data, offset, len); > + > + /* disable edma3 clocks */ > + disable_edma3_clocks(); > + > + *((unsigned int *)offset) += len; > +} > +#endif > -- > 2.5.0 > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot thanks!
diff --git a/drivers/spi/ti_qspi.c b/drivers/spi/ti_qspi.c index 3356c0f072e5..753d68980bd6 100644 --- a/drivers/spi/ti_qspi.c +++ b/drivers/spi/ti_qspi.c @@ -13,6 +13,8 @@ #include <spi.h> #include <asm/gpio.h> #include <asm/omap_gpio.h> +#include <asm/omap_common.h> +#include <asm/ti-common/ti-edma3.h> /* ti qpsi register bit masks */ #define QSPI_TIMEOUT 2000000 @@ -347,3 +349,24 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, return 0; } +#ifdef CONFIG_TI_EDMA3 +void spi_flash_copy_mmap(void *data, void *offset, size_t len) +{ + unsigned int addr = (unsigned int) (data); + unsigned int edma_slot_num = 1; + + /* Invalidate the area, so no writeback into the RAM races with DMA */ + invalidate_dcache_range(addr, addr + roundup(len, ARCH_DMA_MINALIGN)); + + /* enable edma3 clocks */ + enable_edma3_clocks(); + + /* Call edma3 api to do actual DMA transfer */ + edma3_transfer(EDMA3_BASE, edma_slot_num, data, offset, len); + + /* disable edma3 clocks */ + disable_edma3_clocks(); + + *((unsigned int *)offset) += len; +} +#endif
ti_qspi uses memory map mode for faster read. Enabling DMA will increase read speed by 3x @48MHz on DRA74 EVM. Signed-off-by: Vignesh R <vigneshr@ti.com> --- drivers/spi/ti_qspi.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)