mirror of https://github.com/hak5/openwrt.git
69 lines
2.2 KiB
Diff
69 lines
2.2 KiB
Diff
From 61dc388f577b6f984797949f32c30021d9ea73dc Mon Sep 17 00:00:00 2001
|
|
From: Jonas Gorski <jogo@openwrt.org>
|
|
Date: Sun, 23 Aug 2015 12:16:02 +0200
|
|
Subject: [PATCH V2] spi/bcm63xx-hsspi: add support for dual spi read/write
|
|
|
|
Add support for dual read/writes on spi-bcm63xx-hsspi. This has been
|
|
tested with a s25fl129p1 dual read capable spi flash, with a nice speed
|
|
improvement:
|
|
|
|
serial read:
|
|
|
|
root@OpenWrt:/# time dd if=/dev/mtd4 of=/dev/null bs=8192
|
|
2032+0 records in
|
|
2032+0 records out
|
|
real 0m 4.39s
|
|
user 0m 0.00s
|
|
sys 0m 1.55s
|
|
|
|
dual read:
|
|
|
|
root@OpenWrt:/# time dd if=/dev/mtd4 of=/dev/null bs=8192
|
|
2032+0 records in
|
|
2032+0 records out
|
|
real 0m 3.09s
|
|
user 0m 0.00s
|
|
sys 0m 1.56s
|
|
|
|
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
|
|
---
|
|
drivers/spi/spi-bcm63xx-hsspi.c | 13 +++++++++----
|
|
1 file changed, 9 insertions(+), 4 deletions(-)
|
|
|
|
--- a/drivers/spi/spi-bcm63xx-hsspi.c
|
|
+++ b/drivers/spi/spi-bcm63xx-hsspi.c
|
|
@@ -76,6 +76,7 @@
|
|
#define HSSPI_FIFO_REG(x) (0x200 + (x) * 0x200)
|
|
|
|
|
|
+#define HSSPI_OP_MULTIBIT BIT(11)
|
|
#define HSSPI_OP_CODE_SHIFT 13
|
|
#define HSSPI_OP_SLEEP (0 << HSSPI_OP_CODE_SHIFT)
|
|
#define HSSPI_OP_READ_WRITE (1 << HSSPI_OP_CODE_SHIFT)
|
|
@@ -171,9 +172,12 @@ static int bcm63xx_hsspi_do_txrx(struct
|
|
if (opcode != HSSPI_OP_READ)
|
|
step_size -= HSSPI_OPCODE_LEN;
|
|
|
|
- __raw_writel(0 << MODE_CTRL_PREPENDBYTE_CNT_SHIFT |
|
|
- 2 << MODE_CTRL_MULTIDATA_WR_STRT_SHIFT |
|
|
- 2 << MODE_CTRL_MULTIDATA_RD_STRT_SHIFT | 0xff,
|
|
+ if ((opcode == HSSPI_OP_READ && t->rx_nbits == SPI_NBITS_DUAL) ||
|
|
+ (opcode == HSSPI_OP_WRITE && t->tx_nbits == SPI_NBITS_DUAL))
|
|
+ opcode |= HSSPI_OP_MULTIBIT;
|
|
+
|
|
+ __raw_writel(1 << MODE_CTRL_MULTIDATA_WR_SIZE_SHIFT |
|
|
+ 1 << MODE_CTRL_MULTIDATA_RD_SIZE_SHIFT | 0xff,
|
|
bs->regs + HSSPI_PROFILE_MODE_CTRL_REG(chip_select));
|
|
|
|
while (pending > 0) {
|
|
@@ -374,7 +378,8 @@ static int bcm63xx_hsspi_probe(struct pl
|
|
master->num_chipselect = 8;
|
|
master->setup = bcm63xx_hsspi_setup;
|
|
master->transfer_one_message = bcm63xx_hsspi_transfer_one;
|
|
- master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
|
|
+ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH |
|
|
+ SPI_RX_DUAL | SPI_TX_DUAL;
|
|
master->bits_per_word_mask = SPI_BPW_MASK(8);
|
|
master->auto_runtime_pm = true;
|
|
|