This patch adds support for the QSPI IP found in stm32f7 devices.
Signed-off-by: Michael Kurz michi.kurz@gmail.com
--- This currently hard disables any multi i/o in the device tree, as it is impossible to get this working without interpreting the commands of the spi-flash framework in the xfer function and setting the used i/o lines accordingly. As i understand a spi-nor framework is currently in the making which addresses these problems. Should i base this driver on the new framework or is it ok in the current form and should later be ported to the new one?
Changes in v2: - Replaced bit shifts and masks with BIT() and GENMASK() macro
arch/arm/dts/stm32f746-disco.dts | 4 +- arch/arm/include/asm/arch-stm32f7/stm32_periph.h | 6 +- arch/arm/mach-stm32/stm32f7/clock.c | 4 + board/st/stm32f746-disco/stm32f746-disco.c | 60 +++ configs/stm32f746-disco_defconfig | 7 + drivers/spi/Kconfig | 8 + drivers/spi/Makefile | 1 + drivers/spi/stm32_qspi.c | 628 +++++++++++++++++++++++ 8 files changed, 714 insertions(+), 4 deletions(-) create mode 100644 drivers/spi/stm32_qspi.c
diff --git a/arch/arm/dts/stm32f746-disco.dts b/arch/arm/dts/stm32f746-disco.dts index 7b652f0..b58889a 100644 --- a/arch/arm/dts/stm32f746-disco.dts +++ b/arch/arm/dts/stm32f746-disco.dts @@ -146,8 +146,8 @@ #size-cells = <1>; compatible = "micron,n25q128a13", "spi-flash"; spi-max-frequency = <108000000>; - spi-tx-bus-width = <4>; - spi-rx-bus-width = <4>; + spi-tx-bus-width = <1>; + spi-rx-bus-width = <1>; memory-map = <0x90000000 0x1000000>; reg = <0>; }; diff --git a/arch/arm/include/asm/arch-stm32f7/stm32_periph.h b/arch/arm/include/asm/arch-stm32f7/stm32_periph.h index 508b5f2..3c5604a 100644 --- a/arch/arm/include/asm/arch-stm32f7/stm32_periph.h +++ b/arch/arm/include/asm/arch-stm32f7/stm32_periph.h @@ -15,8 +15,9 @@ * */ enum periph_id { - UART1_GPIOA_9_10 = 0, - UART2_GPIOD_5_6, + PERIPH_ID_USART1 = 37, + + PERIPH_ID_QUADSPI = 92, };
enum periph_clock { @@ -37,6 +38,7 @@ enum periph_clock { TIMER2_CLOCK_CFG, FMC_CLOCK_CFG, STMMAC_CLOCK_CFG, + QSPI_CLOCK_CFG, };
#endif /* __ASM_ARM_ARCH_PERIPH_H */ diff --git a/arch/arm/mach-stm32/stm32f7/clock.c b/arch/arm/mach-stm32/stm32f7/clock.c index b068828..818401e 100644 --- a/arch/arm/mach-stm32/stm32f7/clock.c +++ b/arch/arm/mach-stm32/stm32f7/clock.c @@ -71,6 +71,7 @@ struct stm32_rcc_regs { * RCC AHB3ENR specific definitions */ #define RCC_AHB3ENR_FMC_EN BIT(0) +#define RCC_AHB3ENR_QSPI_EN BIT(1)
/* * RCC APB1ENR specific definitions @@ -342,6 +343,9 @@ void clock_setup(int peripheral) setbits_le32(&STM32_RCC->ahb1enr, RCC_AHB1ENR_ETHMAC_RX_EN); setbits_le32(&STM32_RCC->ahb1enr, RCC_AHB1ENR_ETHMAC_TX_EN); break; + case QSPI_CLOCK_CFG: + setbits_le32(&STM32_RCC->ahb3enr, RCC_AHB3ENR_QSPI_EN); + break; default: break; } diff --git a/board/st/stm32f746-disco/stm32f746-disco.c b/board/st/stm32f746-disco/stm32f746-disco.c index 970eabe..dcf3a4e 100644 --- a/board/st/stm32f746-disco/stm32f746-disco.c +++ b/board/st/stm32f746-disco/stm32f746-disco.c @@ -326,6 +326,60 @@ static int stmmac_setup(void) } #endif
+#ifdef CONFIG_STM32_QSPI +const struct stm32_gpio_ctl gpio_ctl_qspi_9 = { + .mode = STM32_GPIO_MODE_AF, + .otype = STM32_GPIO_OTYPE_PP, + .speed = STM32_GPIO_SPEED_100M, + .pupd = STM32_GPIO_PUPD_NO, + .af = STM32_GPIO_AF9 +}; + +const struct stm32_gpio_ctl gpio_ctl_qspi_10 = { + .mode = STM32_GPIO_MODE_AF, + .otype = STM32_GPIO_OTYPE_PP, + .speed = STM32_GPIO_SPEED_100M, + .pupd = STM32_GPIO_PUPD_NO, + .af = STM32_GPIO_AF10 +}; + +static const struct stm32_gpio_dsc qspi_af9_gpio[] = { + {STM32_GPIO_PORT_B, STM32_GPIO_PIN_2}, /* QUADSPI_CLK */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_11}, /* QUADSPI_BK1_IO0 */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_12}, /* QUADSPI_BK1_IO1 */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_13}, /* QUADSPI_BK1_IO3 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_2}, /* QUADSPI_BK1_IO2 */ +}; + +static const struct stm32_gpio_dsc qspi_af10_gpio[] = { + {STM32_GPIO_PORT_B, STM32_GPIO_PIN_6}, /* QUADSPI_BK1_NCS */ +}; + +static int qspi_setup(void) +{ + int res = 0; + int i; + + clock_setup(GPIO_B_CLOCK_CFG); + clock_setup(GPIO_D_CLOCK_CFG); + clock_setup(GPIO_E_CLOCK_CFG); + + for (i = 0; i < ARRAY_SIZE(qspi_af9_gpio); i++) { + res = stm32_gpio_config(&qspi_af9_gpio[i], &gpio_ctl_qspi_9); + if (res) + return res; + } + + for (i = 0; i < ARRAY_SIZE(qspi_af10_gpio); i++) { + res = stm32_gpio_config(&qspi_af10_gpio[i], &gpio_ctl_qspi_10); + if (res) + return res; + } + + return 0; +} +#endif + u32 get_board_rev(void) { return 0; @@ -346,6 +400,12 @@ int board_early_init_f(void) return res; #endif
+#ifdef CONFIG_STM32_QSPI + res = qspi_setup(); + if (res) + return res; +#endif + return 0; }
diff --git a/configs/stm32f746-disco_defconfig b/configs/stm32f746-disco_defconfig index 7301380..4a81f02 100644 --- a/configs/stm32f746-disco_defconfig +++ b/configs/stm32f746-disco_defconfig @@ -12,6 +12,7 @@ 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_SF=y # CONFIG_CMD_FPGA is not set # CONFIG_CMD_SETEXPR is not set CONFIG_CMD_DHCP=y @@ -24,8 +25,14 @@ CONFIG_CMD_TIMER=y CONFIG_OF_CONTROL=y CONFIG_NET_RANDOM_ETHADDR=y CONFIG_NETCONSOLE=y +CONFIG_MTD=y +CONFIG_DM_SPI_FLASH=y +CONFIG_SPI_FLASH=y +CONFIG_SPI_FLASH_STMICRO=y CONFIG_DM_ETH=y CONFIG_ETH_DESIGNWARE=y # CONFIG_SPL_SERIAL_PRESENT is not set +CONFIG_DM_SPI=y +CONFIG_STM32_QSPI=y CONFIG_OF_LIBFDT_OVERLAY=y # CONFIG_EFI_LOADER is not set diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 0f51b3a..f3f7dbe 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -124,6 +124,14 @@ config SANDBOX_SPI }; };
+config STM32_QSPI + bool "STM32F7 QSPI driver" + depends on STM32F7 + help + Enable the STM32F7 Quad-SPI (QSPI) driver. This driver can be + used to access the SPI NOR flash chips on platforms embedding + this ST IP core. + config TEGRA114_SPI bool "nVidia Tegra114 SPI driver" help diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 247c5f6..59068d0 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -46,6 +46,7 @@ obj-$(CONFIG_ROCKCHIP_SPI) += rk_spi.o obj-$(CONFIG_SANDBOX_SPI) += sandbox_spi.o obj-$(CONFIG_SH_SPI) += sh_spi.o obj-$(CONFIG_SH_QSPI) += sh_qspi.o +obj-$(CONFIG_STM32_QSPI) += stm32_qspi.o obj-$(CONFIG_TEGRA114_SPI) += tegra114_spi.o obj-$(CONFIG_TEGRA20_SFLASH) += tegra20_sflash.o obj-$(CONFIG_TEGRA20_SLINK) += tegra20_slink.o diff --git a/drivers/spi/stm32_qspi.c b/drivers/spi/stm32_qspi.c new file mode 100644 index 0000000..123a1f3 --- /dev/null +++ b/drivers/spi/stm32_qspi.c @@ -0,0 +1,628 @@ +/* + * (C) Copyright 2016 + * + * Michael Kurz, michi.kurz@gmail.com + * + * STM32 QSPI driver + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <malloc.h> +#include <spi.h> +#include <spi_flash.h> +#include <asm/io.h> +#include <dm.h> +#include <errno.h> +#include <asm/arch/stm32.h> +#include <asm/arch/stm32_defs.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct stm32_qspi_regs { + u32 cr; /* 0x00 */ + u32 dcr; /* 0x04 */ + u32 sr; /* 0x08 */ + u32 fcr; /* 0x0C */ + u32 dlr; /* 0x10 */ + u32 ccr; /* 0x14 */ + u32 ar; /* 0x18 */ + u32 abr; /* 0x1C */ + u32 dr; /* 0x20 */ + u32 psmkr; /* 0x24 */ + u32 psmar; /* 0x28 */ + u32 pir; /* 0x2C */ + u32 lptr; /* 0x30 */ +}; + +/* + * QUADSPI control register + */ +#define STM32_QSPI_CR_EN BIT(0) +#define STM32_QSPI_CR_ABORT BIT(1) +#define STM32_QSPI_CR_DMAEN BIT(2) +#define STM32_QSPI_CR_TCEN BIT(3) +#define STM32_QSPI_CR_SSHIFT BIT(4) +#define STM32_QSPI_CR_DFM BIT(6) +#define STM32_QSPI_CR_FSEL BIT(7) +#define STM32_QSPI_CR_FTHRES_MASK GENMASK(4, 0) +#define STM32_QSPI_CR_FTHRES_SHIFT (8) +#define STM32_QSPI_CR_TEIE BIT(16) +#define STM32_QSPI_CR_TCIE BIT(17) +#define STM32_QSPI_CR_FTIE BIT(18) +#define STM32_QSPI_CR_SMIE BIT(19) +#define STM32_QSPI_CR_TOIE BIT(20) +#define STM32_QSPI_CR_APMS BIT(22) +#define STM32_QSPI_CR_PMM BIT(23) +#define STM32_QSPI_CR_PRESCALER_MASK GENMASK(7, 0) +#define STM32_QSPI_CR_PRESCALER_SHIFT (24) + +/* + * QUADSPI device configuration register + */ +#define STM32_QSPI_DCR_CKMODE BIT(0) +#define STM32_QSPI_DCR_CSHT_MASK GENMASK(2, 0) +#define STM32_QSPI_DCR_CSHT_SHIFT (8) +#define STM32_QSPI_DCR_FSIZE_MASK GENMASK(4, 0) +#define STM32_QSPI_DCR_FSIZE_SHIFT (16) + +/* + * QUADSPI status register + */ +#define STM32_QSPI_SR_TEF BIT(0) +#define STM32_QSPI_SR_TCF BIT(1) +#define STM32_QSPI_SR_FTF BIT(2) +#define STM32_QSPI_SR_SMF BIT(3) +#define STM32_QSPI_SR_TOF BIT(4) +#define STM32_QSPI_SR_BUSY BIT(5) +#define STM32_QSPI_SR_FLEVEL_MASK GENMASK(5, 0) +#define STM32_QSPI_SR_FLEVEL_SHIFT (8) + +/* + * QUADSPI flag clear register + */ +#define STM32_QSPI_FCR_CTEF BIT(0) +#define STM32_QSPI_FCR_CTCF BIT(1) +#define STM32_QSPI_FCR_CSMF BIT(3) +#define STM32_QSPI_FCR_CTOF BIT(4) + +/* + * QUADSPI communication configuration register + */ +#define STM32_QSPI_CCR_DDRM BIT(31) +#define STM32_QSPI_CCR_DHHC BIT(30) +#define STM32_QSPI_CCR_SIOO BIT(28) +#define STM32_QSPI_CCR_FMODE_SHIFT (26) +#define STM32_QSPI_CCR_DMODE_SHIFT (24) +#define STM32_QSPI_CCR_DCYC_SHIFT (18) +#define STM32_QSPI_CCR_DCYC_MASK GENMASK(4, 0) +#define STM32_QSPI_CCR_ABSIZE_SHIFT (16) +#define STM32_QSPI_CCR_ABMODE_SHIFT (14) +#define STM32_QSPI_CCR_ADSIZE_SHIFT (12) +#define STM32_QSPI_CCR_ADMODE_SHIFT (10) +#define STM32_QSPI_CCR_IMODE_SHIFT (8) +#define STM32_QSPI_CCR_INSTRUCTION_MASK GENMASK(7, 0) + +enum STM32_QSPI_CCR_IMODE { + STM32_QSPI_CCR_IMODE_NONE = 0, + STM32_QSPI_CCR_IMODE_ONE_LINE = 1, + STM32_QSPI_CCR_IMODE_TWO_LINE = 2, + STM32_QSPI_CCR_IMODE_FOUR_LINE = 3, +}; + +enum STM32_QSPI_CCR_ADMODE { + STM32_QSPI_CCR_ADMODE_NONE = 0, + STM32_QSPI_CCR_ADMODE_ONE_LINE = 1, + STM32_QSPI_CCR_ADMODE_TWO_LINE = 2, + STM32_QSPI_CCR_ADMODE_FOUR_LINE = 3, +}; + +enum STM32_QSPI_CCR_ADSIZE { + STM32_QSPI_CCR_ADSIZE_8BIT = 0, + STM32_QSPI_CCR_ADSIZE_16BIT = 1, + STM32_QSPI_CCR_ADSIZE_24BIT = 2, + STM32_QSPI_CCR_ADSIZE_32BIT = 3, +}; + +enum STM32_QSPI_CCR_ABMODE { + STM32_QSPI_CCR_ABMODE_NONE = 0, + STM32_QSPI_CCR_ABMODE_ONE_LINE = 1, + STM32_QSPI_CCR_ABMODE_TWO_LINE = 2, + STM32_QSPI_CCR_ABMODE_FOUR_LINE = 3, +}; + +enum STM32_QSPI_CCR_ABSIZE { + STM32_QSPI_CCR_ABSIZE_8BIT = 0, + STM32_QSPI_CCR_ABSIZE_16BIT = 1, + STM32_QSPI_CCR_ABSIZE_24BIT = 2, + STM32_QSPI_CCR_ABSIZE_32BIT = 3, +}; + +enum STM32_QSPI_CCR_DMODE { + STM32_QSPI_CCR_DMODE_NONE = 0, + STM32_QSPI_CCR_DMODE_ONE_LINE = 1, + STM32_QSPI_CCR_DMODE_TWO_LINE = 2, + STM32_QSPI_CCR_DMODE_FOUR_LINE = 3, +}; + +enum STM32_QSPI_CCR_FMODE { + STM32_QSPI_CCR_IND_WRITE = 0, + STM32_QSPI_CCR_IND_READ = 1, + STM32_QSPI_CCR_AUTO_POLL = 2, + STM32_QSPI_CCR_MEM_MAP = 3, +}; + +/* default SCK frequency, unit: HZ */ +#define STM32_QSPI_DEFAULT_SCK_FREQ 108000000 + +struct stm32_qspi_platdata { + u32 base; + u32 memory_map; + u32 max_hz; +}; + +struct stm32_qspi_priv { + struct stm32_qspi_regs *regs; + u32 max_hz; + u32 mode; + + u32 command; + u32 address; + u32 dummycycles; +#define CMD_HAS_ADR BIT(24) +#define CMD_HAS_DUMMY BIT(25) +#define CMD_HAS_DATA BIT(26) +}; + +static void _stm32_qspi_disable(struct stm32_qspi_priv *priv) +{ + clrbits_le32(&priv->regs->cr, STM32_QSPI_CR_EN); +} + +static void _stm32_qspi_enable(struct stm32_qspi_priv *priv) +{ + setbits_le32(&priv->regs->cr, STM32_QSPI_CR_EN); +} + +static void _stm32_qspi_wait_for_not_busy(struct stm32_qspi_priv *priv) +{ + while (readl(&priv->regs->sr) & STM32_QSPI_SR_BUSY) + ; +} + +static void _stm32_qspi_wait_for_complete(struct stm32_qspi_priv *priv) +{ + while (!(readl(&priv->regs->sr) & STM32_QSPI_SR_TCF)) + ; +} + +static void _stm32_qspi_wait_for_ftf(struct stm32_qspi_priv *priv) +{ + while (!(readl(&priv->regs->sr) & STM32_QSPI_SR_FTF)) + ; +} + +static void _stm32_qspi_set_flash_size(struct stm32_qspi_priv *priv, u32 size) +{ + u32 fsize = fls(size) - 1; + clrsetbits_le32(&priv->regs->dcr, + STM32_QSPI_DCR_FSIZE_MASK << STM32_QSPI_DCR_FSIZE_SHIFT, + fsize << STM32_QSPI_DCR_FSIZE_SHIFT); +} + +static unsigned int _stm32_qspi_gen_ccr(struct stm32_qspi_priv *priv) +{ + unsigned int ccr_reg = 0; + u8 imode, admode, dmode; + u32 mode = priv->mode; + u32 cmd = (priv->command & STM32_QSPI_CCR_INSTRUCTION_MASK); + + imode = STM32_QSPI_CCR_IMODE_ONE_LINE; + admode = STM32_QSPI_CCR_ADMODE_ONE_LINE; + + if (mode & SPI_RX_QUAD) { + dmode = STM32_QSPI_CCR_DMODE_FOUR_LINE; + if (mode & SPI_TX_QUAD) { + imode = STM32_QSPI_CCR_IMODE_FOUR_LINE; + admode = STM32_QSPI_CCR_ADMODE_FOUR_LINE; + } + } else if (mode & SPI_RX_DUAL) { + dmode = STM32_QSPI_CCR_DMODE_TWO_LINE; + if (mode & SPI_TX_DUAL) { + imode = STM32_QSPI_CCR_IMODE_TWO_LINE; + admode = STM32_QSPI_CCR_ADMODE_TWO_LINE; + } + } else { + dmode = STM32_QSPI_CCR_DMODE_ONE_LINE; + } + + if (priv->command & CMD_HAS_DATA) + ccr_reg |= (dmode << STM32_QSPI_CCR_DMODE_SHIFT); + + if (priv->command & CMD_HAS_DUMMY) + ccr_reg |= ((priv->dummycycles & STM32_QSPI_CCR_DCYC_MASK) + << STM32_QSPI_CCR_DCYC_SHIFT); + + if (priv->command & CMD_HAS_ADR) { + ccr_reg |= (STM32_QSPI_CCR_ADSIZE_24BIT + << STM32_QSPI_CCR_ADSIZE_SHIFT); + ccr_reg |= (admode << STM32_QSPI_CCR_ADMODE_SHIFT); + } + ccr_reg |= (imode << STM32_QSPI_CCR_IMODE_SHIFT); + ccr_reg |= cmd; + return ccr_reg; +} + +static void _stm32_qspi_enable_mmap(struct stm32_qspi_priv *priv, + struct spi_flash *flash) +{ + priv->command = flash->read_cmd | CMD_HAS_ADR | CMD_HAS_DATA + | CMD_HAS_DUMMY; + priv->dummycycles = flash->dummy_byte * 8; + + unsigned int ccr_reg = _stm32_qspi_gen_ccr(priv); + ccr_reg |= (STM32_QSPI_CCR_MEM_MAP << STM32_QSPI_CCR_FMODE_SHIFT); + + _stm32_qspi_wait_for_not_busy(priv); + + writel(ccr_reg, &priv->regs->ccr); + + priv->dummycycles = 0; +} + +static void _stm32_qspi_disable_mmap(struct stm32_qspi_priv *priv) +{ + setbits_le32(&priv->regs->cr, STM32_QSPI_CR_ABORT); +} + +static void _stm32_qspi_set_xfer_length(struct stm32_qspi_priv *priv, + u32 length) +{ + writel(length - 1, &priv->regs->dlr); +} + +static void _stm32_qspi_start_xfer(struct stm32_qspi_priv *priv, u32 cr_reg) +{ + writel(cr_reg, &priv->regs->ccr); + + if (priv->command & CMD_HAS_ADR) + writel(priv->address, &priv->regs->ar); +} + +static int _stm32_qspi_xfer(struct stm32_qspi_priv *priv, + struct spi_flash *flash, unsigned int bitlen, + const u8 *dout, u8 *din, unsigned long flags) +{ + unsigned int words = bitlen / 8; + + if (flags & SPI_XFER_MMAP) { + _stm32_qspi_enable_mmap(priv, flash); + return 0; + } else if (flags & SPI_XFER_MMAP_END) { + _stm32_qspi_disable_mmap(priv); + return 0; + } + + if (bitlen == 0) + return -1; + + if (bitlen % 8) { + debug("spi_xfer: Non byte aligned SPI transfer\n"); + return -1; + } + + if (dout && din) { + debug("spi_xfer: QSPI cannot have data in and data out set\n"); + return -1; + } + + if (!dout && (flags & SPI_XFER_BEGIN)) { + debug("spi_xfer: QSPI transfer must begin with command\n"); + return -1; + } + + if (dout) { + if (flags & SPI_XFER_BEGIN) { + /* data is command */ + priv->command = dout[0] | CMD_HAS_DATA; + if (words >= 4) { + /* address is here too */ + priv->address = (dout[1] << 16) | + (dout[2] << 8) | dout[3]; + priv->command |= CMD_HAS_ADR; + } + + if (words > 4) { + /* rest is dummy bytes */ + priv->dummycycles = (words - 4) * 8; + priv->command |= CMD_HAS_DUMMY; + } + + if (flags & SPI_XFER_END) { + /* command without data */ + priv->command &= ~(CMD_HAS_DATA); + } + } + + if (flags & SPI_XFER_END) { + u32 ccr_reg = _stm32_qspi_gen_ccr(priv); + ccr_reg |= STM32_QSPI_CCR_IND_WRITE + << STM32_QSPI_CCR_FMODE_SHIFT; + + _stm32_qspi_wait_for_not_busy(priv); + + if (priv->command & CMD_HAS_DATA) + _stm32_qspi_set_xfer_length(priv, words); + + _stm32_qspi_start_xfer(priv, ccr_reg); + + debug("%s: write: ccr:0x%08x adr:0x%08x\n", + __func__, priv->regs->ccr, priv->regs->ar); + + if (priv->command & CMD_HAS_DATA) { + _stm32_qspi_wait_for_ftf(priv); + + debug("%s: words:%d data:", __func__, words); + + int i = 0; + while (words > i) { + writeb(dout[i], &priv->regs->dr); + debug("%02x ", dout[i]); + i++; + } + debug("\n"); + + _stm32_qspi_wait_for_complete(priv); + } else { + _stm32_qspi_wait_for_not_busy(priv); + } + } + } else if (din) { + u32 ccr_reg = _stm32_qspi_gen_ccr(priv); + ccr_reg |= STM32_QSPI_CCR_IND_READ + << STM32_QSPI_CCR_FMODE_SHIFT; + + _stm32_qspi_wait_for_not_busy(priv); + + _stm32_qspi_set_xfer_length(priv, words); + + _stm32_qspi_start_xfer(priv, ccr_reg); + + debug("%s: read: ccr:0x%08x adr:0x%08x len:%d\n", __func__, + priv->regs->ccr, priv->regs->ar, priv->regs->dlr); + + debug("%s: data:", __func__); + + int i = 0; + while (words > i) { + din[i] = readb(&priv->regs->dr); + debug("%02x ", din[i]); + i++; + } + debug("\n"); + } + + return 0; +} + +static int stm32_qspi_ofdata_to_platdata(struct udevice *bus) +{ + struct fdt_resource res_regs, res_mem; + struct stm32_qspi_platdata *plat = bus->platdata; + const void *blob = gd->fdt_blob; + int node = bus->of_offset; + int ret; + + ret = fdt_get_named_resource(blob, node, "reg", "reg-names", + "QuadSPI", &res_regs); + if (ret) { + debug("Error: can't get regs base addresses(ret = %d)!\n", ret); + return -ENOMEM; + } + ret = fdt_get_named_resource(blob, node, "reg", "reg-names", + "QuadSPI-memory", &res_mem); + if (ret) { + debug("Error: can't get mmap base address(ret = %d)!\n", ret); + return -ENOMEM; + } + + plat->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", + STM32_QSPI_DEFAULT_SCK_FREQ); + + plat->base = res_regs.start; + plat->memory_map = res_mem.start; + + debug("%s: regs=<0x%x> mapped=<0x%x>, max-frequency=%d\n", + __func__, + plat->base, + plat->memory_map, + plat->max_hz + ); + + return 0; +} + +static int stm32_qspi_probe(struct udevice *bus) +{ + struct stm32_qspi_platdata *plat = dev_get_platdata(bus); + struct stm32_qspi_priv *priv = dev_get_priv(bus); + struct dm_spi_bus *dm_spi_bus; + + dm_spi_bus = bus->uclass_priv; + + dm_spi_bus->max_hz = plat->max_hz; + + priv->regs = (struct stm32_qspi_regs *)(uintptr_t)plat->base; + + priv->max_hz = plat->max_hz; + + clock_setup(QSPI_CLOCK_CFG); + + setbits_le32(&priv->regs->cr, STM32_QSPI_CR_SSHIFT); + + return 0; +} + +static int stm32_qspi_remove(struct udevice *bus) +{ + return 0; +} + +static int stm32_qspi_claim_bus(struct udevice *dev) +{ + struct stm32_qspi_priv *priv; + struct udevice *bus; + struct spi_flash *flash; + + bus = dev->parent; + priv = dev_get_priv(bus); + flash = dev_get_uclass_priv(dev); + + _stm32_qspi_set_flash_size(priv, flash->size); + + _stm32_qspi_enable(priv); + + return 0; +} + +static int stm32_qspi_release_bus(struct udevice *dev) +{ + struct stm32_qspi_priv *priv; + struct udevice *bus; + + bus = dev->parent; + priv = dev_get_priv(bus); + + _stm32_qspi_disable(priv); + + return 0; +} + +static int stm32_qspi_xfer(struct udevice *dev, unsigned int bitlen, + const void *dout, void *din, unsigned long flags) +{ + struct stm32_qspi_priv *priv; + struct udevice *bus; + struct spi_flash *flash; + + bus = dev->parent; + priv = dev_get_priv(bus); + flash = dev_get_uclass_priv(dev); + + return _stm32_qspi_xfer(priv, flash, bitlen, (const u8 *)dout, + (u8 *)din, flags); +} + +static int stm32_qspi_set_speed(struct udevice *bus, uint speed) +{ + struct stm32_qspi_platdata *plat = bus->platdata; + struct stm32_qspi_priv *priv = dev_get_priv(bus); + + if (speed > plat->max_hz) + speed = plat->max_hz; + + u32 qspi_clk = clock_get(CLOCK_AHB); + u32 prescaler = 255; + if (speed > 0) { + prescaler = DIV_ROUND_UP(qspi_clk, speed) - 1; + if (prescaler > 255) + prescaler = 255; + else if (prescaler < 0) + prescaler = 0; + } + + u32 csht = DIV_ROUND_UP((5 * qspi_clk) / (prescaler + 1), 100000000); + csht = (csht - 1) & STM32_QSPI_DCR_CSHT_MASK; + + _stm32_qspi_wait_for_not_busy(priv); + + clrsetbits_le32(&priv->regs->cr, + STM32_QSPI_CR_PRESCALER_MASK << + STM32_QSPI_CR_PRESCALER_SHIFT, + prescaler << STM32_QSPI_CR_PRESCALER_SHIFT); + + + clrsetbits_le32(&priv->regs->dcr, + STM32_QSPI_DCR_CSHT_MASK << STM32_QSPI_DCR_CSHT_SHIFT, + csht << STM32_QSPI_DCR_CSHT_SHIFT); + + debug("%s: regs=%p, speed=%d\n", __func__, priv->regs, + (qspi_clk / (prescaler + 1))); + + return 0; +} + +static int stm32_qspi_set_mode(struct udevice *bus, uint mode) +{ + struct stm32_qspi_priv *priv = dev_get_priv(bus); + + _stm32_qspi_wait_for_not_busy(priv); + + if ((mode & SPI_CPHA) && (mode & SPI_CPOL)) + setbits_le32(&priv->regs->dcr, STM32_QSPI_DCR_CKMODE); + else if (!(mode & SPI_CPHA) && !(mode & SPI_CPOL)) + clrbits_le32(&priv->regs->dcr, STM32_QSPI_DCR_CKMODE); + else + return -ENODEV; + + if (mode & SPI_CS_HIGH) + return -ENODEV; + + if (mode & SPI_RX_QUAD) + priv->mode |= SPI_RX_QUAD; + else if (mode & SPI_RX_DUAL) + priv->mode |= SPI_RX_DUAL; + else + priv->mode &= ~(SPI_RX_QUAD | SPI_RX_DUAL); + + if (mode & SPI_TX_QUAD) + priv->mode |= SPI_TX_QUAD; + else if (mode & SPI_TX_DUAL) + priv->mode |= SPI_TX_DUAL; + else + priv->mode &= ~(SPI_TX_QUAD | SPI_TX_DUAL); + + debug("%s: regs=%p, mode=%d rx: ", __func__, priv->regs, mode); + + if (mode & SPI_RX_QUAD) + debug("quad, tx: "); + else if (mode & SPI_RX_DUAL) + debug("dual, tx: "); + else + debug("single, tx: "); + + if (mode & SPI_TX_QUAD) + debug("quad\n"); + else if (mode & SPI_TX_DUAL) + debug("dual\n"); + else + debug("single\n"); + + return 0; +} + +static const struct dm_spi_ops stm32_qspi_ops = { + .claim_bus = stm32_qspi_claim_bus, + .release_bus = stm32_qspi_release_bus, + .xfer = stm32_qspi_xfer, + .set_speed = stm32_qspi_set_speed, + .set_mode = stm32_qspi_set_mode, +}; + +static const struct udevice_id stm32_qspi_ids[] = { + { .compatible = "st,stm32-qspi" }, + { } +}; + +U_BOOT_DRIVER(stm32_qspi) = { + .name = "stm32_qspi", + .id = UCLASS_SPI, + .of_match = stm32_qspi_ids, + .ops = &stm32_qspi_ops, + .ofdata_to_platdata = stm32_qspi_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct stm32_qspi_platdata), + .priv_auto_alloc_size = sizeof(struct stm32_qspi_priv), + .probe = stm32_qspi_probe, + .remove = stm32_qspi_remove, +};