[U-Boot] [v4 00/10] spi: cadence_qspi: sram depth from DT & fix for FIFO width
This patchset adds support to get controller sram size from device tree, fix to support different FIFO widths & adds dt binding doc.
Also this patchset enables cadence qspi controller for stv0991 soc, saves environment in spi flash & moves CONFIG_OF in the defconfig file.
Changes in v4: - Moved SPI configs in arch/arm/Kconfig - stv0991 device tree file for qspi updated
Changes in v3: - Clubbed two patchsets: 1. [v2 0/3] spi: cadence_qspi: sram depth from DT & fix for FIFO width 2. [v2 0/6] stv0991: enable cadence qspi controller & spi flash
Changes in v2: - fix the checkpatch error.
Vikas Manocha (10): stv0991: enable saving enrironment in spi flash stv0991: move OF_CONTROL config to defconfig stv0991: remove define CONFIG_OF_SEPARATE from board file stv0991: configure clock & pad muxing for qspi stv0991: enable cadence qspi controller & spi flash stv0991: configure device tree for cadence qspi & flash spi: cadence_qspi: move the sram partition in init spi: cadence_qspi: get sram size from device tree spi: cadence_qspi: support FIFO width other than 4 bytes spi: cadence_qspi: add device tree binding doc
arch/arm/Kconfig | 3 + arch/arm/cpu/armv7/stv0991/clock.c | 4 +- arch/arm/cpu/armv7/stv0991/pinmux.c | 5 ++ arch/arm/dts/socfpga.dtsi | 1 + arch/arm/dts/stv0991.dts | 30 ++++++++++ arch/arm/include/asm/arch-stv0991/stv0991_cgu.h | 15 +++++ arch/arm/include/asm/arch-stv0991/stv0991_creg.h | 9 +++ arch/arm/include/asm/arch-stv0991/stv0991_periph.h | 2 + board/st/stv0991/stv0991.c | 8 +++ configs/stv0991_defconfig | 2 +- doc/device-tree-bindings/spi/spi-cadence.txt | 28 +++++++++ drivers/spi/cadence_qspi.c | 1 + drivers/spi/cadence_qspi.h | 1 + drivers/spi/cadence_qspi_apb.c | 62 ++++++++------------ include/configs/stv0991.h | 21 ++++++- 15 files changed, 151 insertions(+), 41 deletions(-) create mode 100644 doc/device-tree-bindings/spi/spi-cadence.txt
Signed-off-by: Vikas Manocha vikas.manocha@st.com ---
Changes in v4: none Changes in v3: Rebased to spi-next-dev Changes in v2: None
configs/stv0991_defconfig | 1 - include/configs/stv0991.h | 4 +++- 2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/configs/stv0991_defconfig b/configs/stv0991_defconfig index 8e8ce9f..731ede1 100644 --- a/configs/stv0991_defconfig +++ b/configs/stv0991_defconfig @@ -7,7 +7,6 @@ CONFIG_AUTOBOOT_KEYED=y CONFIG_AUTOBOOT_PROMPT="Hit SPACE in %d seconds to stop autoboot.\n" CONFIG_AUTOBOOT_STOP_STR=" " # CONFIG_CMD_IMLS is not set -# CONFIG_CMD_SAVEENV is not set # CONFIG_CMD_FLASH is not set # CONFIG_CMD_SETEXPR is not set CONFIG_NETDEVICES=y diff --git a/include/configs/stv0991.h b/include/configs/stv0991.h index 6379fd3..d498c12 100644 --- a/include/configs/stv0991.h +++ b/include/configs/stv0991.h @@ -23,7 +23,9 @@ #define PHYS_SDRAM_1_SIZE 0x00198000
#define CONFIG_ENV_SIZE 0x10000 -#define CONFIG_ENV_IS_IN_FLASH +#define CONFIG_ENV_IS_IN_SPI_FLASH +#define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE +#define CONFIG_ENV_OFFSET 0x30000 #define CONFIG_ENV_ADDR \ (PHYS_SDRAM_1_SIZE - CONFIG_ENV_SIZE) #define CONFIG_SYS_MAXARGS 16
Signed-off-by: Vikas Manocha vikas.manocha@st.com ---
Changes in v4: None Changes in v3: Rebased to spi-next-dev Changes in v2: None
configs/stv0991_defconfig | 1 + include/configs/stv0991.h | 1 - 2 files changed, 1 insertion(+), 1 deletion(-)
diff --git a/configs/stv0991_defconfig b/configs/stv0991_defconfig index 731ede1..3bdb1fc 100644 --- a/configs/stv0991_defconfig +++ b/configs/stv0991_defconfig @@ -11,3 +11,4 @@ CONFIG_AUTOBOOT_STOP_STR=" " # CONFIG_CMD_SETEXPR is not set CONFIG_NETDEVICES=y CONFIG_ETH_DESIGNWARE=y +CONFIG_OF_CONTROL=y diff --git a/include/configs/stv0991.h b/include/configs/stv0991.h index d498c12..ff82afc 100644 --- a/include/configs/stv0991.h +++ b/include/configs/stv0991.h @@ -75,6 +75,5 @@ #define CONFIG_BOOTCOMMAND "go 0x40040000"
#define CONFIG_OF_SEPARATE -#define CONFIG_OF_CONTROL #define CONFIG_OF_LIBFDT #endif /* __CONFIG_H */
CONFIG_OF_SEPARATE is default define with CONFIG_OF_CONTROL, removing this define from the board file to avoid multiple definition warning.
Signed-off-by: Vikas Manocha vikas.manocha@st.com ---
Changes in v4: None Changes in v3: Rebased to spi-next-dev Changes in v2: None
include/configs/stv0991.h | 1 - 1 file changed, 1 deletion(-)
diff --git a/include/configs/stv0991.h b/include/configs/stv0991.h index ff82afc..718ef40 100644 --- a/include/configs/stv0991.h +++ b/include/configs/stv0991.h @@ -74,6 +74,5 @@ #define CONFIG_BOOTDELAY 3 #define CONFIG_BOOTCOMMAND "go 0x40040000"
-#define CONFIG_OF_SEPARATE #define CONFIG_OF_LIBFDT #endif /* __CONFIG_H */
stv0991 has cadence qspi controller for flash interfacing, this patch configures the device pads & clock for the controller.
Signed-off-by: Vikas Manocha vikas.manocha@st.com ---
Changes in v4: none Changes in v3: Rebased to spi-next-dev Changes in v2: - removed checkpatch.pl error.
arch/arm/cpu/armv7/stv0991/clock.c | 4 +++- arch/arm/cpu/armv7/stv0991/pinmux.c | 5 +++++ arch/arm/include/asm/arch-stv0991/stv0991_cgu.h | 15 +++++++++++++++ arch/arm/include/asm/arch-stv0991/stv0991_creg.h | 9 +++++++++ arch/arm/include/asm/arch-stv0991/stv0991_periph.h | 2 ++ board/st/stv0991/stv0991.c | 8 ++++++++ 6 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv7/stv0991/clock.c b/arch/arm/cpu/armv7/stv0991/clock.c index 70b8a8d..26c0d36 100644 --- a/arch/arm/cpu/armv7/stv0991/clock.c +++ b/arch/arm/cpu/armv7/stv0991/clock.c @@ -33,7 +33,9 @@ void clock_setup(int peripheral) /* Clock selection for ethernet tx_clk & rx_clk*/ writel((readl(&stv0991_cgu_regs->eth_ctrl) & ETH_CLK_MASK) | ETH_CLK_CTRL, &stv0991_cgu_regs->eth_ctrl); - + break; + case QSPI_CLOCK_CFG: + writel(QSPI_CLK_CTRL, &stv0991_cgu_regs->qspi_freq); break; default: break; diff --git a/arch/arm/cpu/armv7/stv0991/pinmux.c b/arch/arm/cpu/armv7/stv0991/pinmux.c index 1d086a2..24c67fa 100644 --- a/arch/arm/cpu/armv7/stv0991/pinmux.c +++ b/arch/arm/cpu/armv7/stv0991/pinmux.c @@ -55,6 +55,11 @@ int stv0991_pinmux_config(int peripheral) ETH_M_VDD_CFG, &stv0991_creg->vdd_pad1);
break; + case QSPI_CS_CLK_PAD: + writel((readl(&stv0991_creg->mux13) & FLASH_CS_NC_MASK) | + CFG_FLASH_CS_NC, &stv0991_creg->mux13); + writel((readl(&stv0991_creg->mux13) & FLASH_CLK_MASK) | + CFG_FLASH_CLK, &stv0991_creg->mux13); default: break; } diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h b/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h index ddcbb57..f0045f3 100644 --- a/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h +++ b/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h @@ -113,4 +113,19 @@ struct stv0991_cgu_regs {
#define ETH_CLK_CTRL (ETH_CLK_RX_EXT_PHY << RX_CLK_SHIFT \ | ETH_CLK_TX_EXT_PHY) +/* CGU qspi clock */ +#define DIV_HCLK1_SHIFT 9 +#define DIV_CRYP_SHIFT 6 +#define MDIV_QSPI_SHIFT 3 + +#define CLK_QSPI_OSC 0 +#define CLK_QSPI_MCLK 1 +#define CLK_QSPI_PLL1 2 +#define CLK_QSPI_PLL2 3 + +#define QSPI_CLK_CTRL (3 << DIV_HCLK1_SHIFT \ + | 1 << DIV_CRYP_SHIFT \ + | 0 << MDIV_QSPI_SHIFT \ + | CLK_QSPI_OSC) + #endif diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_creg.h b/arch/arm/include/asm/arch-stv0991/stv0991_creg.h index c804eb5..737c952 100644 --- a/arch/arm/include/asm/arch-stv0991/stv0991_creg.h +++ b/arch/arm/include/asm/arch-stv0991/stv0991_creg.h @@ -49,6 +49,15 @@ struct stv0991_creg { u32 vdd_comp1; /* offset 0x400 */ };
+/* CREG MUX 13 register */ +#define FLASH_CS_NC_SHIFT 4 +#define FLASH_CS_NC_MASK ~(7 << FLASH_CS_NC_SHIFT) +#define CFG_FLASH_CS_NC (0 << FLASH_CS_NC_SHIFT) + +#define FLASH_CLK_SHIFT 0 +#define FLASH_CLK_MASK ~(7 << FLASH_CLK_SHIFT) +#define CFG_FLASH_CLK (0 << FLASH_CLK_SHIFT) + /* CREG MUX 12 register */ #define GPIOC_30_MUX_SHIFT 24 #define GPIOC_30_MUX_MASK ~(1 << GPIOC_30_MUX_SHIFT) diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_periph.h b/arch/arm/include/asm/arch-stv0991/stv0991_periph.h index f728c83..725da83 100644 --- a/arch/arm/include/asm/arch-stv0991/stv0991_periph.h +++ b/arch/arm/include/asm/arch-stv0991/stv0991_periph.h @@ -18,6 +18,7 @@ enum periph_id { UART_GPIOC_30_31 = 0, UART_GPIOB_16_17, ETH_GPIOB_10_31_C_0_4, + QSPI_CS_CLK_PAD, PERIPH_ID_I2C0, PERIPH_ID_I2C1, PERIPH_ID_I2C2, @@ -39,6 +40,7 @@ enum periph_id { enum periph_clock { UART_CLOCK_CFG = 0, ETH_CLOCK_CFG, + QSPI_CLOCK_CFG, };
#endif /* __ASM_ARM_ARCH_PERIPH_H */ diff --git a/board/st/stv0991/stv0991.c b/board/st/stv0991/stv0991.c index 09f973f..add1ce1 100644 --- a/board/st/stv0991/stv0991.c +++ b/board/st/stv0991/stv0991.c @@ -55,12 +55,20 @@ int board_eth_enable(void) return 0; }
+int board_qspi_enable(void) +{ + stv0991_pinmux_config(QSPI_CS_CLK_PAD); + clock_setup(QSPI_CLOCK_CFG); + return 0; +} + /* * Miscellaneous platform dependent initialisations */ int board_init(void) { board_eth_enable(); + board_qspi_enable(); return 0; }
This patch does all the board configurations required to use the qspi controller & attached spi flash memory.
Signed-off-by: Vikas Manocha vikas.manocha@st.com ---
Changes in v4: - Moved SPI configs in arch/arm/Kconfig Changes in v3: Rebased to spi-next-dev Changes in v2: None
arch/arm/Kconfig | 3 +++ include/configs/stv0991.h | 15 +++++++++++++++ 2 files changed, 18 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 192d9cf..7495279 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -227,6 +227,9 @@ config TARGET_STV0991 select CPU_V7 select DM select DM_SERIAL + select DM_SPI + select SPI_FLASH + select DM_SPI_FLASH
config TARGET_X600 bool "Support x600" diff --git a/include/configs/stv0991.h b/include/configs/stv0991.h index 718ef40..887f31a 100644 --- a/include/configs/stv0991.h +++ b/include/configs/stv0991.h @@ -75,4 +75,19 @@ #define CONFIG_BOOTCOMMAND "go 0x40040000"
#define CONFIG_OF_LIBFDT + +/* ++ * QSPI support ++ */ +#ifdef CONFIG_OF_CONTROL /* QSPI is controlled via DT */ +#define CONFIG_CADENCE_QSPI +#define CONFIG_CQSPI_DECODER 0 +#define CONFIG_CQSPI_REF_CLK ((30/4)/2)*1000*1000 +#define CONFIG_CMD_SPI + +#define CONFIG_SPI_FLASH_STMICRO /* Micron/Numonyx flash */ +#define CONFIG_SPI_FLASH_WINBOND /* WINBOND */ +#define CONFIG_CMD_SF +#endif + #endif /* __CONFIG_H */
This patch add the device tree entry for qspi controller & spi flash memory.
Signed-off-by: Vikas Manocha vikas.manocha@st.com ---
Changes in v4: - removed not needed properties from stv0991 device tree file for qspi
Changes in v3: Rebased to spi-next-dev Changes in v2: None
arch/arm/dts/stv0991.dts | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)
diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts index b25c48b..3b1efca 100644 --- a/arch/arm/dts/stv0991.dts +++ b/arch/arm/dts/stv0991.dts @@ -20,4 +20,38 @@ reg = <0x80406000 0x1000>; clock = <2700000>; }; + + aliases { + spi0 = "/spi@80203000"; /* QSPI */ + }; + + qspi: spi@80203000 { + compatible = "cadence,qspi"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x80203000 0x100>, + <0x40000000 0x1000000>; + clocks = <3750000>; + ext-decoder = <0>; /* external decoder */ + num-cs = <4>; + fifo-depth = <256>; + bus-num = <0>; + status = "okay"; + + flash0: n25q32@0 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "spi-flash"; + reg = <0>; /* chip select */ + spi-max-frequency = <50000000>; + m25p,fast-read; + page-size = <256>; + block-size = <16>; /* 2^16, 64KB */ + read-delay = <4>; /* delay value in read data capture register */ + tshsl-ns = <50>; + tsd2d-ns = <50>; + tchsh-ns = <4>; + tslch-ns = <4>; + }; + }; };
There is no need to re-configure sram partition for every read/write for better full use of sram for read or write. This patch divides the half sram for read & half for write once at initialization.
Signed-off-by: Vikas Manocha vikas.manocha@st.com Tested-by: Stefan Roese sr@denx.de ---
Changes in v4: None Changes in v3: Rebased to spi-next-dev Changes in v2: None
drivers/spi/cadence_qspi_apb.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-)
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c index 00a115f..f2c22af 100644 --- a/drivers/spi/cadence_qspi_apb.c +++ b/drivers/spi/cadence_qspi_apb.c @@ -38,10 +38,7 @@
/* Controller sram size in word */ #define CQSPI_REG_SRAM_SIZE_WORD (128) -#define CQSPI_REG_SRAM_RESV_WORDS (2) -#define CQSPI_REG_SRAM_PARTITION_WR (1) -#define CQSPI_REG_SRAM_PARTITION_RD \ - (CQSPI_REG_SRAM_SIZE_WORD - CQSPI_REG_SRAM_RESV_WORDS) +#define CQSPI_REG_SRAM_PARTITION_RD (CQSPI_REG_SRAM_SIZE_WORD/2) #define CQSPI_REG_SRAM_THRESHOLD_WORDS (50)
/* Transfer mode */ @@ -538,6 +535,10 @@ void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat) /* Configure the remap address register, no remap */ writel(0, plat->regbase + CQSPI_REG_REMAP);
+ /* Indirect mode configurations */ + writel(CQSPI_REG_SRAM_PARTITION_RD, + plat->regbase + CQSPI_REG_SRAMPARTITION); + /* Disable all interrupts */ writel(0, plat->regbase + CQSPI_REG_IRQMASK);
@@ -700,10 +701,6 @@ int cadence_qspi_apb_indirect_read_setup(struct cadence_spi_platdata *plat, writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK), plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
- /* Configure SRAM partition for read. */ - writel(CQSPI_REG_SRAM_PARTITION_RD, plat->regbase + - CQSPI_REG_SRAMPARTITION); - /* Configure the opcode */ rd_reg = cmdbuf[0] << CQSPI_REG_RD_INSTR_OPCODE_LSB;
@@ -801,9 +798,6 @@ int cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata *plat, writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK), plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
- writel(CQSPI_REG_SRAM_PARTITION_WR, - plat->regbase + CQSPI_REG_SRAMPARTITION); - /* Configure the opcode */ reg = cmdbuf[0] << CQSPI_REG_WR_INSTR_OPCODE_LSB; writel(reg, plat->regbase + CQSPI_REG_WR_INSTR);
sram size could be different on different socs, e.g. on stv0991 it is 256 while on altera platform it is 128. It is better to receive it from device tree.
Signed-off-by: Vikas Manocha vikas.manocha@st.com Tested-by: Stefan Roese sr@denx.de ---
Changes in v4: None Changes in v3: Rebased to spi-next-dev Changes in v2: None
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 | 6 +----- 5 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi index bf791c5..9b12420 100644 --- a/arch/arm/dts/socfpga.dtsi +++ b/arch/arm/dts/socfpga.dtsi @@ -639,6 +639,7 @@ ext-decoder = <0>; /* external decoder */ num-cs = <4>; fifo-depth = <128>; + sram-size = <128>; bus-num = <2>; status = "disabled"; }; diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts index 3b1efca..556df82 100644 --- a/arch/arm/dts/stv0991.dts +++ b/arch/arm/dts/stv0991.dts @@ -35,6 +35,7 @@ ext-decoder = <0>; /* external decoder */ num-cs = <4>; fifo-depth = <256>; + sram-size = <256>; bus-num = <0>; status = "okay";
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c index a75fc46..34a0f46 100644 --- a/drivers/spi/cadence_qspi.c +++ b/drivers/spi/cadence_qspi.c @@ -309,6 +309,7 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus) plat->tsd2d_ns = fdtdec_get_int(blob, subnode, "tsd2d-ns", 255); 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);
debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-size=%d\n", __func__, plat->regbase, plat->ahbbase, plat->max_hz, diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h index c9a6142..98e57aa 100644 --- a/drivers/spi/cadence_qspi.h +++ b/drivers/spi/cadence_qspi.h @@ -25,6 +25,7 @@ struct cadence_spi_platdata { u32 tsd2d_ns; u32 tchsh_ns; u32 tslch_ns; + u32 sram_size; };
struct cadence_spi_priv { diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c index f2c22af..cbf0d42 100644 --- a/drivers/spi/cadence_qspi_apb.c +++ b/drivers/spi/cadence_qspi_apb.c @@ -36,9 +36,6 @@
#define CQSPI_FIFO_WIDTH (4)
-/* Controller sram size in word */ -#define CQSPI_REG_SRAM_SIZE_WORD (128) -#define CQSPI_REG_SRAM_PARTITION_RD (CQSPI_REG_SRAM_SIZE_WORD/2) #define CQSPI_REG_SRAM_THRESHOLD_WORDS (50)
/* Transfer mode */ @@ -536,8 +533,7 @@ void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat) writel(0, plat->regbase + CQSPI_REG_REMAP);
/* Indirect mode configurations */ - writel(CQSPI_REG_SRAM_PARTITION_RD, - plat->regbase + CQSPI_REG_SRAMPARTITION); + writel((plat->sram_size/2), plat->regbase + CQSPI_REG_SRAMPARTITION);
/* Disable all interrupts */ writel(0, plat->regbase + CQSPI_REG_IRQMASK);
This patch makes the code compatible with FIFO depths other than 4 bytes. It also simplify read/write FIFO loops.
Signed-off-by: Vikas Manocha vikas.manocha@st.com Tested-by: Stefan Roese sr@denx.de ---
Changes in v4: none Changes in v3: Rebased to spi-next-dev Changes in v2: Fixed the checkpatch.pl error
drivers/spi/cadence_qspi_apb.c | 46 ++++++++++++++++++++-------------------- 1 file changed, 23 insertions(+), 23 deletions(-)
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c index cbf0d42..d053407 100644 --- a/drivers/spi/cadence_qspi_apb.c +++ b/drivers/spi/cadence_qspi_apb.c @@ -200,18 +200,16 @@ static void cadence_qspi_apb_read_fifo_data(void *dest, unsigned int *dest_ptr = (unsigned int *)dest; unsigned int *src_ptr = (unsigned int *)src_ahb_addr;
- while (remaining > 0) { - if (remaining >= CQSPI_FIFO_WIDTH) { - *dest_ptr = readl(src_ptr); - remaining -= CQSPI_FIFO_WIDTH; - } else { - /* dangling bytes */ - temp = readl(src_ptr); - memcpy(dest_ptr, &temp, remaining); - break; - } + while (remaining >= sizeof(dest_ptr)) { + *dest_ptr = readl(src_ptr); + remaining -= sizeof(src_ptr); dest_ptr++; } + if (remaining) { + /* dangling bytes */ + temp = readl(src_ptr); + memcpy(dest_ptr, &temp, remaining); + }
return; } @@ -219,24 +217,26 @@ 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) { - unsigned int temp; + unsigned int temp = 0; + int i; int remaining = bytes; unsigned int *dest_ptr = (unsigned int *)dest_ahb_addr; unsigned int *src_ptr = (unsigned int *)src;
- while (remaining > 0) { - if (remaining >= CQSPI_FIFO_WIDTH) { - writel(*src_ptr, dest_ptr); - remaining -= sizeof(unsigned int); - } else { - /* dangling bytes */ - memcpy(&temp, src_ptr, remaining); - writel(temp, dest_ptr); - break; - } - src_ptr++; + while (remaining >= CQSPI_FIFO_WIDTH) { + for (i = CQSPI_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; + } + if (remaining) { + /* dangling bytes */ + i = remaining/sizeof(dest_ptr); + memcpy(&temp, src_ptr+i, remaining % sizeof(dest_ptr)); + writel(temp, dest_ptr+i); + for (--i; i >= 0; i--) + writel(*(src_ptr+i), dest_ptr+i); } - return; }
This patch adds the device tree binding doc for the cadence qspi controller & also removes the not needed properties from the stv0991 device tree.
Signed-off-by: Vikas Manocha vikas.manocha@st.com ---
Changes in v4: removed changes done in socfpga dts/dtsi
Changes in v3: added new
arch/arm/dts/stv0991.dts | 5 ----- doc/device-tree-bindings/spi/spi-cadence.txt | 28 ++++++++++++++++++++++++++ 2 files changed, 28 insertions(+), 5 deletions(-) create mode 100644 doc/device-tree-bindings/spi/spi-cadence.txt
diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts index 556df82..fa3fd64 100644 --- a/arch/arm/dts/stv0991.dts +++ b/arch/arm/dts/stv0991.dts @@ -32,11 +32,7 @@ reg = <0x80203000 0x100>, <0x40000000 0x1000000>; clocks = <3750000>; - ext-decoder = <0>; /* external decoder */ - num-cs = <4>; - fifo-depth = <256>; sram-size = <256>; - bus-num = <0>; status = "okay";
flash0: n25q32@0 { @@ -48,7 +44,6 @@ m25p,fast-read; page-size = <256>; block-size = <16>; /* 2^16, 64KB */ - read-delay = <4>; /* delay value in read data capture register */ tshsl-ns = <50>; tsd2d-ns = <50>; tchsh-ns = <4>; diff --git a/doc/device-tree-bindings/spi/spi-cadence.txt b/doc/device-tree-bindings/spi/spi-cadence.txt new file mode 100644 index 0000000..c1e2233 --- /dev/null +++ b/doc/device-tree-bindings/spi/spi-cadence.txt @@ -0,0 +1,28 @@ +Cadence QSPI controller device tree bindings +-------------------------------------------- + +Required properties: +- compatible : should be "cadence,qspi". +- reg : 1.Physical base address and size of SPI registers map. + 2. Physical base address & size of NOR Flash. +- clocks : Clock phandles (see clock bindings for details). +- sram-size : spi controller sram size. +- status : enable in requried dts. + +connected flash properties +-------------------------- + +- spi-max-frequency : Max supported spi frequency. +- page-size : Flash page size. +- block-size : Flash memory block size. +- tshsl-ns : Added delay in master reference clocks (ref_clk) for + the length that the master mode chip select outputs + are de-asserted between transactions. +- tsd2d-ns : Delay in master reference clocks (ref_clk) between one + chip select being de-activated and the activation of + another. +- tchsh-ns : Delay in master reference clocks between last bit of + current transaction and de-asserting the device chip + select (n_ss_out). +- tslch-ns : Delay in master reference clocks between setting + n_ss_out low and first bit transfer
On 3 July 2015 at 06:59, Vikas Manocha vikas.manocha@st.com wrote:
This patchset adds support to get controller sram size from device tree, fix to support different FIFO widths & adds dt binding doc.
Also this patchset enables cadence qspi controller for stv0991 soc, saves environment in spi flash & moves CONFIG_OF in the defconfig file.
Changes in v4:
- Moved SPI configs in arch/arm/Kconfig
- stv0991 device tree file for qspi updated
Changes in v3:
- Clubbed two patchsets: 1. [v2 0/3] spi: cadence_qspi: sram depth from DT & fix for FIFO width 2. [v2 0/6] stv0991: enable cadence qspi controller & spi flash
Changes in v2:
- fix the checkpatch error.
Vikas Manocha (10): stv0991: enable saving enrironment in spi flash stv0991: move OF_CONTROL config to defconfig stv0991: remove define CONFIG_OF_SEPARATE from board file stv0991: configure clock & pad muxing for qspi stv0991: enable cadence qspi controller & spi flash stv0991: configure device tree for cadence qspi & flash spi: cadence_qspi: move the sram partition in init spi: cadence_qspi: get sram size from device tree spi: cadence_qspi: support FIFO width other than 4 bytes spi: cadence_qspi: add device tree binding doc
arch/arm/Kconfig | 3 + arch/arm/cpu/armv7/stv0991/clock.c | 4 +- arch/arm/cpu/armv7/stv0991/pinmux.c | 5 ++ arch/arm/dts/socfpga.dtsi | 1 + arch/arm/dts/stv0991.dts | 30 ++++++++++ arch/arm/include/asm/arch-stv0991/stv0991_cgu.h | 15 +++++ arch/arm/include/asm/arch-stv0991/stv0991_creg.h | 9 +++ arch/arm/include/asm/arch-stv0991/stv0991_periph.h | 2 + board/st/stv0991/stv0991.c | 8 +++ configs/stv0991_defconfig | 2 +- doc/device-tree-bindings/spi/spi-cadence.txt | 28 +++++++++ drivers/spi/cadence_qspi.c | 1 + drivers/spi/cadence_qspi.h | 1 + drivers/spi/cadence_qspi_apb.c | 62 ++++++++------------ include/configs/stv0991.h | 21 ++++++- 15 files changed, 151 insertions(+), 41 deletions(-) create mode 100644 doc/device-tree-bindings/spi/spi-cadence.txt
Applied to u-boot-spi/master
thanks!
participants (2)
-
Jagan Teki -
Vikas Manocha