diff options
author | Tom Rini <trini@konsulko.com> | 2020-07-11 17:40:00 -0400 |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2020-07-11 17:40:00 -0400 |
commit | 497c7598c4e713eb9ad88fd7963e57b21b8b35e1 (patch) | |
tree | f19605acb6bd9fe66a756fa46eb41361bc853a19 /drivers/spi | |
parent | 610e1487c8921d266f5cb304bfb66eb71f1dc7dc (diff) | |
parent | 18c56605c6cd45cb3e1ea39e2a9df46d4eade7ae (diff) | |
download | u-boot-497c7598c4e713eb9ad88fd7963e57b21b8b35e1.zip u-boot-497c7598c4e713eb9ad88fd7963e57b21b8b35e1.tar.gz u-boot-497c7598c4e713eb9ad88fd7963e57b21b8b35e1.tar.bz2 |
Merge branch 'master' of https://gitlab.denx.de/u-boot/custodians/u-boot-spi
- Enable DM_SPI on siemens omap boards (Jagan)
- Dropped some non-dm supported omap3 boards (Jagan)
- Dropped non-dm code in omap3 spi driver (Jagan)
- Dropped non-dm code in kirkwood spi driver (Bhargav)
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/Kconfig | 26 | ||||
-rw-r--r-- | drivers/spi/kirkwood_spi.c | 136 | ||||
-rw-r--r-- | drivers/spi/omap3_spi.c | 136 | ||||
-rw-r--r-- | drivers/spi/soft_spi.c | 48 |
4 files changed, 63 insertions, 283 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 09b9cb1..3a8add9 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -162,6 +162,12 @@ config ICH_SPI access the SPI NOR flash on platforms embedding this Intel ICH IP core. +config KIRKWOOD_SPI + bool "Marvell Kirkwood SPI Driver" + help + Enable support for SPI on various Marvell SoCs, such as + Kirkwood and Armada 375. + config MESON_SPIFC bool "Amlogic Meson SPI Flash Controller driver" depends on ARCH_MESON @@ -226,6 +232,13 @@ config NXP_FSPI Enable the NXP FlexSPI (FSPI) driver. This driver can be used to access the SPI NOR flash on platforms embedding this NXP IP core. +config OMAP3_SPI + bool "McSPI driver for OMAP" + help + SPI master controller for OMAP24XX and later Multichannel SPI + (McSPI). This driver be used to access SPI chips on platforms + embedding this OMAP3 McSPI IP core. + config PIC32_SPI bool "Microchip PIC32 SPI driver" depends on MACH_PIC32 @@ -417,23 +430,10 @@ config SH_QSPI Enable the Renesas Quad SPI controller driver. This driver can be used on Renesas SoCs. -config KIRKWOOD_SPI - bool "Marvell Kirkwood SPI Driver" - help - Enable support for SPI on various Marvell SoCs, such as - Kirkwood and Armada 375. - config MXC_SPI bool "MXC SPI Driver" help Enable the MXC SPI controller driver. This driver can be used on various i.MX SoCs such as i.MX31/35/51/6/7. -config OMAP3_SPI - bool "McSPI driver for OMAP" - help - SPI master controller for OMAP24XX and later Multichannel SPI - (McSPI). This driver be used to access SPI chips on platforms - embedding this OMAP3 McSPI IP core. - endif # menu "SPI Support" diff --git a/drivers/spi/kirkwood_spi.c b/drivers/spi/kirkwood_spi.c index c03923f..92dc2e1 100644 --- a/drivers/spi/kirkwood_spi.c +++ b/drivers/spi/kirkwood_spi.c @@ -19,6 +19,19 @@ #endif #include <asm/arch-mvebu/spi.h> +struct mvebu_spi_dev { + bool is_errata_50mhz_ac; +}; + +struct mvebu_spi_platdata { + struct kwspi_registers *spireg; + bool is_errata_50mhz_ac; +}; + +struct mvebu_spi_priv { + struct kwspi_registers *spireg; +}; + static void _spi_cs_activate(struct kwspi_registers *reg) { setbits_le32(®->ctrl, KWSPI_CSN_ACT); @@ -94,128 +107,6 @@ static int _spi_xfer(struct kwspi_registers *reg, unsigned int bitlen, return 0; } -#if !CONFIG_IS_ENABLED(DM_SPI) - -static struct kwspi_registers *spireg = - (struct kwspi_registers *)MVEBU_SPI_BASE; - -#ifdef CONFIG_ARCH_KIRKWOOD -static u32 cs_spi_mpp_back[2]; -#endif - -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int mode) -{ - struct spi_slave *slave; - u32 data; -#ifdef CONFIG_ARCH_KIRKWOOD - static const u32 kwspi_mpp_config[2][2] = { - { MPP0_SPI_SCn, 0 }, /* if cs == 0 */ - { MPP7_SPI_SCn, 0 } /* if cs != 0 */ - }; -#endif - - if (!spi_cs_is_valid(bus, cs)) - return NULL; - - slave = spi_alloc_slave_base(bus, cs); - if (!slave) - return NULL; - - writel(KWSPI_SMEMRDY, &spireg->ctrl); - - /* calculate spi clock prescaller using max_hz */ - data = ((CONFIG_SYS_TCLK / 2) / max_hz) + 0x10; - data = data < KWSPI_CLKPRESCL_MIN ? KWSPI_CLKPRESCL_MIN : data; - data = data > KWSPI_CLKPRESCL_MASK ? KWSPI_CLKPRESCL_MASK : data; - - /* program spi clock prescaller using max_hz */ - writel(KWSPI_ADRLEN_3BYTE | data, &spireg->cfg); - debug("data = 0x%08x\n", data); - - writel(KWSPI_SMEMRDIRQ, &spireg->irq_cause); - writel(KWSPI_IRQMASK, &spireg->irq_mask); - -#ifdef CONFIG_ARCH_KIRKWOOD - /* program mpp registers to select SPI_CSn */ - kirkwood_mpp_conf(kwspi_mpp_config[cs ? 1 : 0], cs_spi_mpp_back); -#endif - - return slave; -} - -void spi_free_slave(struct spi_slave *slave) -{ -#ifdef CONFIG_ARCH_KIRKWOOD - kirkwood_mpp_conf(cs_spi_mpp_back, NULL); -#endif - free(slave); -} - -__attribute__((weak)) int board_spi_claim_bus(struct spi_slave *slave) -{ - return 0; -} - -int spi_claim_bus(struct spi_slave *slave) -{ - return board_spi_claim_bus(slave); -} - -__attribute__((weak)) void board_spi_release_bus(struct spi_slave *slave) -{ -} - -void spi_release_bus(struct spi_slave *slave) -{ - board_spi_release_bus(slave); -} - -#ifndef CONFIG_SPI_CS_IS_VALID -/* - * you can define this function board specific - * define above CONFIG in board specific config file and - * provide the function in board specific src file - */ -int spi_cs_is_valid(unsigned int bus, unsigned int cs) -{ - return bus == 0 && (cs == 0 || cs == 1); -} -#endif - -void spi_cs_activate(struct spi_slave *slave) -{ - _spi_cs_activate(spireg); -} - -void spi_cs_deactivate(struct spi_slave *slave) -{ - _spi_cs_deactivate(spireg); -} - -int spi_xfer(struct spi_slave *slave, unsigned int bitlen, - const void *dout, void *din, unsigned long flags) -{ - return _spi_xfer(spireg, bitlen, dout, din, flags); -} - -#else - -/* Here now the DM part */ - -struct mvebu_spi_dev { - bool is_errata_50mhz_ac; -}; - -struct mvebu_spi_platdata { - struct kwspi_registers *spireg; - bool is_errata_50mhz_ac; -}; - -struct mvebu_spi_priv { - struct kwspi_registers *spireg; -}; - static int mvebu_spi_set_speed(struct udevice *bus, uint hz) { struct mvebu_spi_platdata *plat = dev_get_platdata(bus); @@ -409,4 +300,3 @@ U_BOOT_DRIVER(mvebu_spi) = { .priv_auto_alloc_size = sizeof(struct mvebu_spi_priv), .probe = mvebu_spi_probe, }; -#endif diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c index ae08531..39e6813 100644 --- a/drivers/spi/omap3_spi.c +++ b/drivers/spi/omap3_spi.c @@ -25,16 +25,6 @@ DECLARE_GLOBAL_DATA_PTR; -#if defined(CONFIG_AM33XX) || defined(CONFIG_AM43XX) -#define OMAP3_MCSPI1_BASE 0x48030100 -#define OMAP3_MCSPI2_BASE 0x481A0100 -#else -#define OMAP3_MCSPI1_BASE 0x48098000 -#define OMAP3_MCSPI2_BASE 0x4809A000 -#define OMAP3_MCSPI3_BASE 0x480B8000 -#define OMAP3_MCSPI4_BASE 0x480BA000 -#endif - #define OMAP4_MCSPI_REG_OFFSET 0x100 struct omap2_mcspi_platform_config { @@ -109,9 +99,6 @@ struct mcspi { }; struct omap3_spi_priv { -#if !CONFIG_IS_ENABLED(DM_SPI) - struct spi_slave slave; -#endif struct mcspi *regs; unsigned int cs; unsigned int freq; @@ -455,128 +442,6 @@ static void _omap3_spi_claim_bus(struct omap3_spi_priv *priv) writel(conf, &priv->regs->modulctrl); } -#if !CONFIG_IS_ENABLED(DM_SPI) - -static inline struct omap3_spi_priv *to_omap3_spi(struct spi_slave *slave) -{ - return container_of(slave, struct omap3_spi_priv, slave); -} - -void spi_free_slave(struct spi_slave *slave) -{ - struct omap3_spi_priv *priv = to_omap3_spi(slave); - - free(priv); -} - -int spi_claim_bus(struct spi_slave *slave) -{ - struct omap3_spi_priv *priv = to_omap3_spi(slave); - - spi_reset(priv->regs); - - _omap3_spi_claim_bus(priv); - _omap3_spi_set_wordlen(priv); - _omap3_spi_set_mode(priv); - _omap3_spi_set_speed(priv); - - return 0; -} - -void spi_release_bus(struct spi_slave *slave) -{ - struct omap3_spi_priv *priv = to_omap3_spi(slave); - - writel(OMAP3_MCSPI_MODULCTRL_MS, &priv->regs->modulctrl); -} - -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int mode) -{ - struct omap3_spi_priv *priv; - struct mcspi *regs; - - /* - * OMAP3 McSPI (MultiChannel SPI) has 4 busses (modules) - * with different number of chip selects (CS, channels): - * McSPI1 has 4 CS (bus 0, cs 0 - 3) - * McSPI2 has 2 CS (bus 1, cs 0 - 1) - * McSPI3 has 2 CS (bus 2, cs 0 - 1) - * McSPI4 has 1 CS (bus 3, cs 0) - */ - - switch (bus) { - case 0: - regs = (struct mcspi *)OMAP3_MCSPI1_BASE; - break; -#ifdef OMAP3_MCSPI2_BASE - case 1: - regs = (struct mcspi *)OMAP3_MCSPI2_BASE; - break; -#endif -#ifdef OMAP3_MCSPI3_BASE - case 2: - regs = (struct mcspi *)OMAP3_MCSPI3_BASE; - break; -#endif -#ifdef OMAP3_MCSPI4_BASE - case 3: - regs = (struct mcspi *)OMAP3_MCSPI4_BASE; - break; -#endif - default: - printf("SPI error: unsupported bus %i. Supported busses 0 - 3\n", bus); - return NULL; - } - - if (((bus == 0) && (cs > 3)) || - ((bus == 1) && (cs > 1)) || - ((bus == 2) && (cs > 1)) || - ((bus == 3) && (cs > 0))) { - printf("SPI error: unsupported chip select %i on bus %i\n", cs, bus); - return NULL; - } - - if (max_hz > OMAP3_MCSPI_MAX_FREQ) { - printf("SPI error: unsupported frequency %i Hz. Max frequency is 48 MHz\n", - max_hz); - return NULL; - } - - if (mode > SPI_MODE_3) { - printf("SPI error: unsupported SPI mode %i\n", mode); - return NULL; - } - - priv = spi_alloc_slave(struct omap3_spi_priv, bus, cs); - if (!priv) { - printf("SPI error: malloc of SPI structure failed\n"); - return NULL; - } - - priv->regs = regs; - priv->cs = cs; - priv->freq = max_hz; - priv->mode = mode; - priv->wordlen = priv->slave.wordlen; -#if 0 - /* Please migrate to DM_SPI support for this feature. */ - priv->pin_dir = MCSPI_PINDIR_D0_OUT_D1_IN; -#endif - - return &priv->slave; -} - -int spi_xfer(struct spi_slave *slave, unsigned int bitlen, - const void *dout, void *din, unsigned long flags) -{ - struct omap3_spi_priv *priv = to_omap3_spi(slave); - - return _spi_xfer(priv, bitlen, dout, din, flags); -} - -#else - static int omap3_spi_claim_bus(struct udevice *dev) { struct udevice *bus = dev->parent; @@ -701,4 +566,3 @@ U_BOOT_DRIVER(omap3_spi) = { .ops = &omap3_spi_ops, .priv_auto_alloc_size = sizeof(struct omap3_spi_priv), }; -#endif diff --git a/drivers/spi/soft_spi.c b/drivers/spi/soft_spi.c index e8d7758..153bbf8 100644 --- a/drivers/spi/soft_spi.c +++ b/drivers/spi/soft_spi.c @@ -61,10 +61,12 @@ static int soft_spi_sda(struct udevice *dev, int bit) static int soft_spi_cs_activate(struct udevice *dev) { struct udevice *bus = dev_get_parent(dev); + struct soft_spi_priv *priv = dev_get_priv(bus); struct soft_spi_platdata *plat = dev_get_platdata(bus); + int cidle = !!(priv->mode & SPI_CPOL); dm_gpio_set_value(&plat->cs, 0); - dm_gpio_set_value(&plat->sclk, 0); + dm_gpio_set_value(&plat->sclk, cidle); /* to idle */ dm_gpio_set_value(&plat->cs, 1); return 0; @@ -82,11 +84,14 @@ static int soft_spi_cs_deactivate(struct udevice *dev) static int soft_spi_claim_bus(struct udevice *dev) { + struct udevice *bus = dev_get_parent(dev); + struct soft_spi_priv *priv = dev_get_priv(bus); + int cidle = !!(priv->mode & SPI_CPOL); /* * Make sure the SPI clock is in idle state as defined for * this slave. */ - return soft_spi_scl(dev, 0); + return soft_spi_scl(dev, cidle); } static int soft_spi_release_bus(struct udevice *dev) @@ -117,7 +122,8 @@ static int soft_spi_xfer(struct udevice *dev, unsigned int bitlen, uchar tmpdout = 0; const u8 *txd = dout; u8 *rxd = din; - int cpha = priv->mode & SPI_CPHA; + int cpha = !!(priv->mode & SPI_CPHA); + int cidle = !!(priv->mode & SPI_CPOL); unsigned int j; debug("spi_xfer: slave %s:%s dout %08X din %08X bitlen %u\n", @@ -143,22 +149,42 @@ static int soft_spi_xfer(struct udevice *dev, unsigned int bitlen, tmpdin = 0; } - if (!cpha) - soft_spi_scl(dev, 0); + /* + * CPOL 0: idle is low (0), active is high (1) + * CPOL 1: idle is high (1), active is low (0) + */ + + /* + * drive bit + * CPHA 1: CLK from idle to active + */ + if (cpha) + soft_spi_scl(dev, !cidle); if ((plat->flags & SPI_MASTER_NO_TX) == 0) soft_spi_sda(dev, !!(tmpdout & 0x80)); udelay(plat->spi_delay_us); - if (cpha) - soft_spi_scl(dev, 0); + + /* + * sample bit + * CPHA 0: CLK from idle to active + * CPHA 1: CLK from active to idle + */ + if (!cpha) + soft_spi_scl(dev, !cidle); else - soft_spi_scl(dev, 1); + soft_spi_scl(dev, cidle); tmpdin <<= 1; if ((plat->flags & SPI_MASTER_NO_RX) == 0) tmpdin |= dm_gpio_get_value(&plat->miso); tmpdout <<= 1; udelay(plat->spi_delay_us); - if (cpha) - soft_spi_scl(dev, 1); + + /* + * drive bit + * CPHA 0: CLK from active to idle + */ + if (!cpha) + soft_spi_scl(dev, cidle); } /* * If the number of bits isn't a multiple of 8, shift the last @@ -179,7 +205,7 @@ static int soft_spi_xfer(struct udevice *dev, unsigned int bitlen, static int soft_spi_set_speed(struct udevice *dev, unsigned int speed) { - /* Accept any speed */ + /* Ignore any speed settings. Speed is implemented via "spi-delay-us" */ return 0; } |