From b3f984233078fcafd236bba4f94a938ab05ebfa2 Mon Sep 17 00:00:00 2001 From: Luiz Angelo Daros de Luca Date: Tue, 11 Feb 2020 16:25:36 -0300 Subject: [PATCH] ath79: add read support using spi-mem Reimplements read optimization on top of spi-mem. Similar to what 461-spi-ath79-add-fast-flash-read.patch used to do with the dropped flash read interface. It accelerate only fast-read op reading flash directly from memory mapped region. 'm25p,fast-read' must be set in order to use the new spi-mem. It improved read speed up to 3x on old devices (tplink,tl-wr2543-v1) while no speed improvement was noticed on newer devices like (tplink,archer-c7-v2). Signed-off-by: Luiz Angelo Daros de Luca --- ...th79-Implement-the-spi_mem-interface.patch | 70 +++++++++++++++++++ ...th79-Implement-the-spi_mem-interface.patch | 70 +++++++++++++++++++ 2 files changed, 140 insertions(+) create mode 100644 target/linux/ath79/patches-4.19/410-spi-ath79-Implement-the-spi_mem-interface.patch create mode 100644 target/linux/ath79/patches-5.4/410-spi-ath79-Implement-the-spi_mem-interface.patch diff --git a/target/linux/ath79/patches-4.19/410-spi-ath79-Implement-the-spi_mem-interface.patch b/target/linux/ath79/patches-4.19/410-spi-ath79-Implement-the-spi_mem-interface.patch new file mode 100644 index 0000000000..9546f32a27 --- /dev/null +++ b/target/linux/ath79/patches-4.19/410-spi-ath79-Implement-the-spi_mem-interface.patch @@ -0,0 +1,70 @@ +From 8d8cdb4a6ccee5b62cc0dc64651c3946364514dc Mon Sep 17 00:00:00 2001 +From: Luiz Angelo Daros de Luca +Date: Mon, 10 Feb 2020 16:11:27 -0300 +Subject: [PATCH] spi: ath79: Implement the spi_mem interface + +Signed-off-by: Luiz Angelo Daros de Luca +--- + drivers/spi/spi-ath79.c | 35 +++++++++++++++++++++++++++++++++++ + 1 file changed, 35 insertions(+) + +Index: linux-4.19.106/drivers/spi/spi-ath79.c +=================================================================== +--- linux-4.19.106.orig/drivers/spi/spi-ath79.c ++++ linux-4.19.106/drivers/spi/spi-ath79.c +@@ -19,6 +19,7 @@ + #include + #include + #include ++#include + #include + #include + #include +@@ -203,6 +204,39 @@ static u32 ath79_spi_txrx_mode0(struct s + return ath79_spi_rr(sp, AR71XX_SPI_REG_RDS); + } + ++static int ath79_exec_mem_op(struct spi_mem *mem, ++ const struct spi_mem_op *op) ++{ ++ struct ath79_spi *sp = ath79_spidev_to_sp(mem->spi); ++ ++ /* Ensures that reading is performed on device connected ++ to hardware cs0 */ ++ if (mem->spi->chip_select || gpio_is_valid(mem->spi->cs_gpio)) ++ return -ENOTSUPP; ++ ++ /* Only use for fast-read op. */ ++ if (op->cmd.opcode != 0x0b || op->data.dir != SPI_MEM_DATA_IN || ++ op->addr.nbytes != 3 || op->dummy.nbytes != 1) ++ return -ENOTSUPP; ++ ++ /* disable GPIO mode */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0); ++ ++ memcpy_fromio(op->data.buf.in, sp->base + op->addr.val, op->data.nbytes); ++ ++ /* enable GPIO mode */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO); ++ ++ /* restore IOC register */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base); ++ ++ return 0; ++} ++ ++static const struct spi_controller_mem_ops ath79_mem_ops = { ++ .exec_op = ath79_exec_mem_op, ++}; ++ + static int ath79_spi_probe(struct platform_device *pdev) + { + struct spi_master *master; +@@ -237,6 +271,7 @@ static int ath79_spi_probe(struct platfo + ret = PTR_ERR(sp->base); + goto err_put_master; + } ++ master->mem_ops = &ath79_mem_ops; + + sp->clk = devm_clk_get(&pdev->dev, "ahb"); + if (IS_ERR(sp->clk)) { diff --git a/target/linux/ath79/patches-5.4/410-spi-ath79-Implement-the-spi_mem-interface.patch b/target/linux/ath79/patches-5.4/410-spi-ath79-Implement-the-spi_mem-interface.patch new file mode 100644 index 0000000000..81a328f8f6 --- /dev/null +++ b/target/linux/ath79/patches-5.4/410-spi-ath79-Implement-the-spi_mem-interface.patch @@ -0,0 +1,70 @@ +From 8d8cdb4a6ccee5b62cc0dc64651c3946364514dc Mon Sep 17 00:00:00 2001 +From: Luiz Angelo Daros de Luca +Date: Mon, 10 Feb 2020 16:11:27 -0300 +Subject: [PATCH] spi: ath79: Implement the spi_mem interface + +Signed-off-by: Luiz Angelo Daros de Luca +--- + drivers/spi/spi-ath79.c | 35 +++++++++++++++++++++++++++++++++++ + 1 file changed, 35 insertions(+) + +Index: linux-5.4.22/drivers/spi/spi-ath79.c +=================================================================== +--- linux-5.4.22.orig/drivers/spi/spi-ath79.c ++++ linux-5.4.22/drivers/spi/spi-ath79.c +@@ -15,6 +15,7 @@ + #include + #include + #include ++#include + #include + #include + #include +@@ -133,6 +134,39 @@ static u32 ath79_spi_txrx_mode0(struct s + return ath79_spi_rr(sp, AR71XX_SPI_REG_RDS); + } + ++static int ath79_exec_mem_op(struct spi_mem *mem, ++ const struct spi_mem_op *op) ++{ ++ struct ath79_spi *sp = ath79_spidev_to_sp(mem->spi); ++ ++ /* Ensures that reading is performed on device connected ++ to hardware cs0 */ ++ if (mem->spi->chip_select || mem->spi->cs_gpiod) ++ return -ENOTSUPP; ++ ++ /* Only use for fast-read op. */ ++ if (op->cmd.opcode != 0x0b || op->data.dir != SPI_MEM_DATA_IN || ++ op->addr.nbytes != 3 || op->dummy.nbytes != 1) ++ return -ENOTSUPP; ++ ++ /* disable GPIO mode */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0); ++ ++ memcpy_fromio(op->data.buf.in, sp->base + op->addr.val, op->data.nbytes); ++ ++ /* enable GPIO mode */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO); ++ ++ /* restore IOC register */ ++ ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base); ++ ++ return 0; ++} ++ ++static const struct spi_controller_mem_ops ath79_mem_ops = { ++ .exec_op = ath79_exec_mem_op, ++}; ++ + static int ath79_spi_probe(struct platform_device *pdev) + { + struct spi_master *master; +@@ -163,6 +197,7 @@ static int ath79_spi_probe(struct platfo + ret = PTR_ERR(sp->base); + goto err_put_master; + } ++ master->mem_ops = &ath79_mem_ops; + + sp->clk = devm_clk_get(&pdev->dev, "ahb"); + if (IS_ERR(sp->clk)) { -- 2.30.2