Fifo width could be different on different socs, e.g. stv0991 & altera soc
have different fifo width.
Signed-off-by: Vikas Manocha <vikas.mano...@st.com>
---
Changes in v7: unused macro moved to separate patch.
Changes in v6: none
Changes in v5: none
Changes in v4: alligned to linux device tree binding.
Changes in v3: none
Changes in v2: Rebased to master
arch/arm/dts/socfpga.dtsi | 1 +
arch/arm/dts/stv0991.dts | 1 +
drivers/spi/cadence_qspi.c | 1 +
drivers/spi/cadence_qspi.h | 1 +
drivers/spi/cadence_qspi_apb.c | 21 ++++++++++-----------
5 files changed, 14 insertions(+), 11 deletions(-)
diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
index 9756544..5f0b0fa 100644
--- a/arch/arm/dts/socfpga.dtsi
+++ b/arch/arm/dts/socfpga.dtsi
@@ -640,6 +640,7 @@
num-cs = <4>;
fifo-depth = <128>;
cdns,trigger-address = <0x00000000>;
+ cdns,fifo-width = <4>;
sram-size = <128>;
bus-num = <2>;
status = "disabled";
diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts
index 6bc5372..0a88b69 100644
--- a/arch/arm/dts/stv0991.dts
+++ b/arch/arm/dts/stv0991.dts
@@ -34,6 +34,7 @@
clocks = <3750000>;
sram-size = <256>;
cdns,trigger-address = <0x40000000>;
+ cdns,fifo-width = <8>;
status = "okay";
flash0: n25q32@0 {
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index c63f583..0430218 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -312,6 +312,7 @@ static int cadence_spi_ofdata_to_platdata(struct udevice
*bus)
plat->tchsh_ns = fdtdec_get_int(blob, subnode, "tchsh-ns", 20);
plat->tslch_ns = fdtdec_get_int(blob, subnode, "tslch-ns", 20);
plat->sram_size = fdtdec_get_int(blob, node, "sram-size", 128);
+ plat->fifo_width = fdtdec_get_int(blob, node, "cdns,fifo-width", 4);
debug("%s: regbase=%p flashbase=%p trigger_base=%p max-frequency=%d
page-size=%d\n",
__func__, plat->regbase, plat->flashbase, plat->trigger_base,
diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
index 7341339..91f38f1 100644
--- a/drivers/spi/cadence_qspi.h
+++ b/drivers/spi/cadence_qspi.h
@@ -27,6 +27,7 @@ struct cadence_spi_platdata {
u32 tchsh_ns;
u32 tslch_ns;
u32 sram_size;
+ u32 fifo_width;
};
struct cadence_spi_priv {
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index c0116e3..478b5a0 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -34,8 +34,6 @@
#define CQSPI_REG_RETRY (10000)
#define CQSPI_POLL_IDLE_RETRY (3)
-#define CQSPI_FIFO_WIDTH (4)
-
#define CQSPI_REG_SRAM_THRESHOLD_WORDS (50)
/* Transfer mode */
@@ -211,7 +209,7 @@ static void cadence_qspi_apb_read_fifo_data(void *dest,
}
static void cadence_qspi_apb_write_fifo_data(const void *dest_ahb_addr,
- const void *src, unsigned int bytes)
+ const void *src, unsigned int fifo_width, unsigned int bytes)
{
unsigned int temp = 0;
int i;
@@ -219,11 +217,11 @@ static void cadence_qspi_apb_write_fifo_data(const void
*dest_ahb_addr,
unsigned int *dest_ptr = (unsigned int *)dest_ahb_addr;
unsigned int *src_ptr = (unsigned int *)src;
- while (remaining >= CQSPI_FIFO_WIDTH) {
- for (i = CQSPI_FIFO_WIDTH/sizeof(src_ptr) - 1; i >= 0; i--)
+ while (remaining >= fifo_width) {
+ for (i = fifo_width/sizeof(src_ptr) - 1; i >= 0; i--)
writel(*(src_ptr+i), dest_ptr+i);
- src_ptr += CQSPI_FIFO_WIDTH/sizeof(src_ptr);
- remaining -= CQSPI_FIFO_WIDTH;
+ src_ptr += fifo_width/sizeof(src_ptr);
+ remaining -= fifo_width;
}
if (remaining) {
/* dangling bytes */
@@ -238,7 +236,7 @@ static void cadence_qspi_apb_write_fifo_data(const void
*dest_ahb_addr,
/* Read from SRAM FIFO with polling SRAM fill level. */
static int qspi_read_sram_fifo_poll(const void *reg_base, void *dest_addr,
- const void *src_addr, unsigned int num_bytes)
+ const void *src_addr, unsigned int fifo_width, unsigned int num_bytes)
{
unsigned int remaining = num_bytes;
unsigned int retry;
@@ -260,7 +258,7 @@ static int qspi_read_sram_fifo_poll(const void *reg_base,
void *dest_addr,
return -1;
}
- sram_level *= CQSPI_FIFO_WIDTH;
+ sram_level *= fifo_width;
sram_level = sram_level > remaining ? remaining : sram_level;
/* Read data from FIFO. */
@@ -302,7 +300,8 @@ static int qpsi_write_sram_fifo_push(struct
cadence_spi_platdata *plat,
wr_bytes = (remaining > page_size) ?
page_size : remaining;
- cadence_qspi_apb_write_fifo_data(dest_addr, src, wr_bytes);
+ cadence_qspi_apb_write_fifo_data(dest_addr, src,
+ plat->fifo_width, wr_bytes);
src += wr_bytes;
remaining -= wr_bytes;
}
@@ -749,7 +748,7 @@ int cadence_qspi_apb_indirect_read_execute(struct
cadence_spi_platdata *plat,
plat->regbase + CQSPI_REG_INDIRECTRD);
if (qspi_read_sram_fifo_poll(plat->regbase, (void *)rxbuf,
- (const void *)plat->trigger_base, rxlen))
+ (const void *)plat->trigger_base, plat->fifo_width, rxlen))
goto failrd;
/* Check flash indirect controller */
--
1.7.9.5
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