[U-Boot] [PATCH 04/34] spi: kirkwood: Full dm conversion

Jagan Teki
2018-11-21T08:39:13Z

On Wed, Nov 21, 2018 at 1:22 PM Chris Packham <judge.packham@gmail.com> wrote:
>
> Hi Jagan,
> On Wed, Nov 21, 2018 at 2:00 AM Jagan Teki <jagan@amarulasolutions.com> wrote:
> >
> > kirkwood now support dt along with platform data,
> > respective boards need to switch into dm for the same.
> >
> > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> > ---
> > Makefile | 2 +-
> > drivers/spi/Makefile | 2 +-
> > drivers/spi/kirkwood_spi.c | 229 +++++-------------------
> > drivers/spi/spi.c | 4 +-
> > include/dm/platform_data/spi_kirkwood.h | 15 ++
> > 5 files changed, 61 insertions(+), 191 deletions(-)
> > create mode 100644 include/dm/platform_data/spi_kirkwood.h
> >
> > diff --git a/Makefile b/Makefile
> > index d06cb5c287..214f1bcdbf 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -919,7 +919,7 @@ ifeq ($(CONFIG_DM_I2C_COMPAT)$(CONFIG_SANDBOX),y)
> > @echo "===================================================="
> > endif
> > ifeq ($(CONFIG_DM_SPI),)
> > -ifeq ($(CONFIG_DAVINCI_SPI),y)
> > +ifeq ($(filter $(CONFIG_DAVINCI_SPI) $(CONFIG_KIRKWOOD_SPI),y),y)
> > @echo "===================== WARNING ======================"
> > @echo "This board uses SPI driver from drivers/spi/ without"
> > @echo "enabling CONFIG_DM_SPI. Please enable CONFIG_DM_SPI"
> > diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
> > index cf5a5cccc0..3c74418992 100644
> > --- a/drivers/spi/Makefile
> > +++ b/drivers/spi/Makefile
> > @@ -7,6 +7,7 @@
> > ifdef CONFIG_DM_SPI
> > obj-y += spi-uclass.o
> > obj-$(CONFIG_DAVINCI_SPI) += davinci_spi.o
> > +obj-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o
> > obj-$(CONFIG_SANDBOX) += spi-emul-uclass.o
> > obj-$(CONFIG_SOFT_SPI) += soft_spi.o
> > obj-$(CONFIG_SPI_MEM) += spi-mem.o
> > @@ -29,7 +30,6 @@ obj-$(CONFIG_FSL_DSPI) += fsl_dspi.o
> > obj-$(CONFIG_FSL_ESPI) += fsl_espi.o
> > obj-$(CONFIG_FSL_QSPI) += fsl_qspi.o
> > obj-$(CONFIG_ICH_SPI) += ich.o
> > -obj-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o
> > obj-$(CONFIG_LPC32XX_SSP) += lpc32xx_ssp.o
> > obj-$(CONFIG_MPC8XX_SPI) += mpc8xx_spi.o
> > obj-$(CONFIG_MPC8XXX_SPI) += mpc8xxx_spi.o
> > diff --git a/drivers/spi/kirkwood_spi.c b/drivers/spi/kirkwood_spi.c
> > index 5dd1ad67cf..e9ca95697f 100644
> > --- a/drivers/spi/kirkwood_spi.c
> > +++ b/drivers/spi/kirkwood_spi.c
> > @@ -13,31 +13,41 @@
> > #include <spi.h>
> > #include <asm/io.h>
> > #include <asm/arch/soc.h>
> > -#ifdef CONFIG_KIRKWOOD
> > -#include <asm/arch/mpp.h>
> > -#endif
> > #include <asm/arch-mvebu/spi.h>
> >
> > -static void _spi_cs_activate(struct kwspi_registers *reg)
> > +#include <dm/platform_data/spi_kirkwood.h>
> > +
> > +struct mvebu_spi_dev {
> > + bool is_errata_50mhz_ac;
> > +};
> > +
> > +struct mvebu_spi_priv {
> > + struct kwspi_registers *spireg;
> > +};
> > +
> > +static void spi_cs_activate(struct kwspi_registers *reg)
> > {
> > setbits_le32(&reg->ctrl, KWSPI_CSN_ACT);
> > }
> >
> > -static void _spi_cs_deactivate(struct kwspi_registers *reg)
> > +static void spi_cs_deactivate(struct kwspi_registers *reg)
> > {
> > clrbits_le32(&reg->ctrl, KWSPI_CSN_ACT);
> > }
> >
> > -static int _spi_xfer(struct kwspi_registers *reg, unsigned int bitlen,
> > - const void *dout, void *din, unsigned long flags)
> > +static int mvebu_spi_xfer(struct udevice *dev, unsigned int bitlen,
> > + const void *dout, void *din, unsigned long flags)
> > {
> > + struct udevice *bus = dev->parent;
> > + struct mvebu_spi_platdata *plat = dev_get_platdata(bus);
> > + struct kwspi_registers *reg = plat->spireg;
> > unsigned int tmpdout, tmpdin;
> > int tm, isread = 0;
> >
> > - debug("spi_xfer: dout %p din %p bitlen %u\n", dout, din, bitlen);
> > + debug("%s: dout %p din %p bitlen %u\n", __func__, dout, din, bitlen);
> >
> > if (flags & SPI_XFER_BEGIN)
> > - _spi_cs_activate(reg);
> > + spi_cs_activate(reg);
> >
> > /*
> > * handle data in 8-bit chunks
> > @@ -55,8 +65,8 @@ static int _spi_xfer(struct kwspi_registers *reg, unsigned int bitlen,
> >
> > clrbits_le32(&reg->irq_cause, KWSPI_SMEMRDIRQ);
> > writel(tmpdout, &reg->dout); /* Write the data out */
> > - debug("*** spi_xfer: ... %08x written, bitlen %d\n",
> > - tmpdout, bitlen);
> > + debug("%s: ... %08x written, bitlen %d\n",
> > + __func__, tmpdout, bitlen);
> >
> > /*
> > * Wait for SPI transmit to get out
> > @@ -67,8 +77,8 @@ static int _spi_xfer(struct kwspi_registers *reg, unsigned int bitlen,
> > if (readl(&reg->irq_cause) & KWSPI_SMEMRDIRQ) {
> > isread = 1;
> > tmpdin = readl(&reg->din);
> > - debug("spi_xfer: din %p..%08x read\n",
> > - din, tmpdin);
> > + debug("%s: din %p..%08x read\n",
> > + __func__, din, tmpdin);
> >
> > if (din) {
> > *((u8 *)din) = (u8)tmpdin;
> > @@ -82,179 +92,17 @@ static int _spi_xfer(struct kwspi_registers *reg, unsigned int bitlen,
> > break;
> > }
> > if (tm >= KWSPI_TIMEOUT)
> > - printf("*** spi_xfer: Time out during SPI transfer\n");
> > + printf("%s: Time out during SPI transfer\n", __func__);
> >
> > debug("loopend bitlen %d\n", bitlen);
> > }
> >
> > if (flags & SPI_XFER_END)
> > - _spi_cs_deactivate(reg);
> > + spi_cs_deactivate(reg);
> >
> > return 0;
> > }
> >
> > -#ifndef CONFIG_DM_SPI
> > -
> > -static struct kwspi_registers *spireg =
> > - (struct kwspi_registers *)MVEBU_SPI_BASE;
> > -
> > -#ifdef CONFIG_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_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_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_KIRKWOOD
> > - kirkwood_mpp_conf(cs_spi_mpp_back, NULL);
> > -#endif
> > - free(slave);
> > -}
> > -
> > -#if defined(CONFIG_SYS_KW_SPI_MPP)
> > -u32 spi_mpp_backup[4];
> > -#endif
> > -
> > -__attribute__((weak)) int board_spi_claim_bus(struct spi_slave *slave)
> > -{
> > - return 0;
> > -}
> > -
> > -int spi_claim_bus(struct spi_slave *slave)
> > -{
> > -#if defined(CONFIG_SYS_KW_SPI_MPP)
> > - u32 config;
> > - u32 spi_mpp_config[4];
> > -
> > - config = CONFIG_SYS_KW_SPI_MPP;
> > -
> > - if (config & MOSI_MPP6)
> > - spi_mpp_config[0] = MPP6_SPI_MOSI;
> > - else
> > - spi_mpp_config[0] = MPP1_SPI_MOSI;
> > -
> > - if (config & SCK_MPP10)
> > - spi_mpp_config[1] = MPP10_SPI_SCK;
> > - else
> > - spi_mpp_config[1] = MPP2_SPI_SCK;
> > -
> > - if (config & MISO_MPP11)
> > - spi_mpp_config[2] = MPP11_SPI_MISO;
> > - else
> > - spi_mpp_config[2] = MPP3_SPI_MISO;
> > -
> > - spi_mpp_config[3] = 0;
> > - spi_mpp_backup[3] = 0;
> > -
> > - /* set new spi mpp and save current mpp config */
> > - kirkwood_mpp_conf(spi_mpp_config, spi_mpp_backup);
> > -#endif
> > -
> > - 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)
> > -{
> > -#if defined(CONFIG_SYS_KW_SPI_MPP)
> > - kirkwood_mpp_conf(spi_mpp_backup, NULL);
> > -#endif
> > -
> > - 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_init(void)
> > -{
> > -}
> > -
> > -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);
> > @@ -329,15 +177,6 @@ static int mvebu_spi_set_mode(struct udevice *bus, uint mode)
> > return 0;
> > }
> >
> > -static int mvebu_spi_xfer(struct udevice *dev, unsigned int bitlen,
> > - const void *dout, void *din, unsigned long flags)
> > -{
> > - struct udevice *bus = dev->parent;
> > - struct mvebu_spi_platdata *plat = dev_get_platdata(bus);
> > -
> > - return _spi_xfer(plat->spireg, bitlen, dout, din, flags);
> > -}
> > -
> > static int mvebu_spi_claim_bus(struct udevice *dev)
> > {
> > struct udevice *bus = dev->parent;
> > @@ -351,6 +190,17 @@ static int mvebu_spi_claim_bus(struct udevice *dev)
> > return 0;
> > }
> >
> > +static const struct dm_spi_ops mvebu_spi_ops = {
> > + .claim_bus = mvebu_spi_claim_bus,
> > + .xfer = mvebu_spi_xfer,
> > + .set_speed = mvebu_spi_set_speed,
> > + .set_mode = mvebu_spi_set_mode,
> > + /*
> > + * cs_info is not needed, since we require all chip selects to be
> > + * in the device tree explicitly
> > + */
> > +};
>
> This was already added in commit 9985bdb1cea7 ("spi: kirkwood_spi.c:
> Add driver model support").

But this one is full conversion with platdata, no non-dm code.