[U-Boot] [PATCH] spi: davinci: Full dm conversion

Jagan Teki jagan at amarulasolutions.com
Fri Aug 10 13:38:56 UTC 2018


On Wed, Aug 8, 2018 at 6:47 PM, Adam Ford <aford173 at gmail.com> wrote:
> On Tue, Aug 7, 2018 at 1:29 AM Jagan Teki <jagan at amarulasolutions.com> wrote:
>>
>> davinci_spi now support dt along with platform data,
>> respective boards need to switch into dm for the same.
>>
>> Cc: Adam Ford <aford173 at gmail.com>
>> Cc: Vitaly Andrianov <vitalya at ti.com>
>> Cc: Stefano Babic <sbabic at denx.de>
>> Cc: Peter Howard <phoward at gme.net.au>
>> Cc: Tom Rini <trini at konsulko.com>
>> Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
>> ---
>>  drivers/spi/Kconfig                    |  12 +-
>>  drivers/spi/davinci_spi.c              | 289 +++++++------------------
>>  include/dm/platform_data/spi_davinci.h |  15 ++
>>  3 files changed, 97 insertions(+), 219 deletions(-)
>>  create mode 100644 include/dm/platform_data/spi_davinci.h
>>
>> diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
>> index d046e919b4..18ebff0231 100644
>> --- a/drivers/spi/Kconfig
>> +++ b/drivers/spi/Kconfig
>> @@ -80,6 +80,12 @@ config CADENCE_QSPI
>>           used to access the SPI NOR flash on platforms embedding this
>>           Cadence IP core.
>>
>> +config DAVINCI_SPI
>> +       bool "Davinci & Keystone SPI driver"
>> +       depends on ARCH_DAVINCI || ARCH_KEYSTONE
>> +       help
>> +         Enable the Davinci SPI driver
>> +
>>  config DESIGNWARE_SPI
>>         bool "Designware SPI driver"
>>         help
>> @@ -281,12 +287,6 @@ config FSL_QSPI
>>           used to access the SPI NOR flash on platforms embedding this
>>           Freescale IP core.
>>
>> -config DAVINCI_SPI
>> -       bool "Davinci & Keystone SPI driver"
>> -       depends on ARCH_DAVINCI || ARCH_KEYSTONE
>> -       help
>> -         Enable the Davinci SPI driver
>> -
>>  config SH_SPI
>>         bool "SuperH SPI driver"
>>         help
>> diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
>> index a822858323..5007e6c618 100644
>> --- a/drivers/spi/davinci_spi.c
>> +++ b/drivers/spi/davinci_spi.c
>> @@ -14,6 +14,7 @@
>>  #include <asm/io.h>
>>  #include <asm/arch/hardware.h>
>>  #include <dm.h>
>> +#include <dm/platform_data/spi_davinci.h>
>>
>>  /* SPIGCR0 */
>>  #define SPIGCR0_SPIENA_MASK    0x1
>> @@ -118,9 +119,6 @@ struct davinci_spi_regs {
>>
>>  /* davinci spi slave */
>>  struct davinci_spi_slave {
>> -#ifndef CONFIG_DM_SPI
>> -       struct spi_slave slave;
>> -#endif
>>         struct davinci_spi_regs *regs;
>>         unsigned int freq; /* current SPI bus frequency */
>>         unsigned int mode; /* current SPI mode used */
>> @@ -240,11 +238,43 @@ static int davinci_spi_read_write(struct davinci_spi_slave *ds, unsigned
>>         return 0;
>>  }
>>
>> +static int davinci_spi_set_speed(struct udevice *bus, uint max_hz)
>> +{
>> +       struct davinci_spi_slave *ds = dev_get_priv(bus);
>>
>> -static int __davinci_spi_claim_bus(struct davinci_spi_slave *ds, int cs)
>> +       debug("%s speed %u\n", __func__, max_hz);
>> +       if (max_hz > CONFIG_SYS_SPI_CLK / 2)
>> +               return -EINVAL;
>> +
>> +       ds->freq = max_hz;
>> +
>> +       return 0;
>> +}
>> +
>> +static int davinci_spi_set_mode(struct udevice *bus, uint mode)
>> +{
>> +       struct davinci_spi_slave *ds = dev_get_priv(bus);
>> +
>> +       debug("%s mode %u\n", __func__, mode);
>> +       ds->mode = mode;
>> +
>> +       return 0;
>> +}
>> +
>> +static int davinci_spi_claim_bus(struct udevice *dev)
>>  {
>> +       struct dm_spi_slave_platdata *slave_plat =
>> +               dev_get_parent_platdata(dev);
>> +       struct udevice *bus = dev->parent;
>> +       struct davinci_spi_slave *ds = dev_get_priv(bus);
>>         unsigned int mode = 0, scalar;
>>
>> +       if (slave_plat->cs >= ds->num_cs) {
>> +               printf("Invalid SPI chipselect\n");
>> +               return -EINVAL;
>> +       }
>> +       ds->half_duplex = slave_plat->mode & SPI_PREAMBLE;
>> +
>>         /* Enable the SPI hardware */
>>         writel(SPIGCR0_SPIRST_MASK, &ds->regs->gcr0);
>>         udelay(1000);
>> @@ -254,7 +284,7 @@ static int __davinci_spi_claim_bus(struct davinci_spi_slave *ds, int cs)
>>         writel(SPIGCR1_MASTER_MASK | SPIGCR1_CLKMOD_MASK, &ds->regs->gcr1);
>>
>>         /* CS, CLK, SIMO and SOMI are functional pins */
>> -       writel(((1 << cs) | SPIPC0_CLKFUN_MASK |
>> +       writel(((1 << slave_plat->cs) | SPIPC0_CLKFUN_MASK |
>>                 SPIPC0_DOFUN_MASK | SPIPC0_DIFUN_MASK), &ds->regs->pc0);
>>
>>         /* setup format */
>> @@ -292,20 +322,32 @@ static int __davinci_spi_claim_bus(struct davinci_spi_slave *ds, int cs)
>>         return 0;
>>  }
>>
>> -static int __davinci_spi_release_bus(struct davinci_spi_slave *ds)
>> +static int davinci_spi_release_bus(struct udevice *dev)
>>  {
>> +       struct davinci_spi_slave *ds = dev_get_priv(dev->parent);
>> +
>>         /* Disable the SPI hardware */
>>         writel(SPIGCR0_SPIRST_MASK, &ds->regs->gcr0);
>>
>>         return 0;
>>  }
>>
>> -static int __davinci_spi_xfer(struct davinci_spi_slave *ds,
>> -               unsigned int bitlen,  const void *dout, void *din,
>> -               unsigned long flags)
>> +static int davinci_spi_xfer(struct udevice *dev, unsigned int bitlen,
>> +                           const void *dout, void *din,
>> +                           unsigned long flags)
>>  {
>> +       struct dm_spi_slave_platdata *slave =
>> +               dev_get_parent_platdata(dev);
>> +       struct udevice *bus = dev->parent;
>> +       struct davinci_spi_slave *ds = dev_get_priv(bus);
>>         unsigned int len;
>>
>> +       if (slave->cs >= ds->num_cs) {
>> +               printf("Invalid SPI chipselect\n");
>> +               return -EINVAL;
>> +       }
>> +       ds->cur_cs = slave->cs;
>> +
>>         if (bitlen == 0)
>>                 /* Finish any previously submitted transfers */
>>                 goto out;
>> @@ -339,240 +381,61 @@ out:
>>                 u8 dummy = 0;
>>                 davinci_spi_write(ds, 1, &dummy, flags);
>>         }
>> -       return 0;
>> -}
>> -
>> -#ifndef CONFIG_DM_SPI
>> -
>> -static inline struct davinci_spi_slave *to_davinci_spi(struct spi_slave *slave)
>> -{
>> -       return container_of(slave, struct davinci_spi_slave, slave);
>> -}
>> -
>> -int spi_cs_is_valid(unsigned int bus, unsigned int cs)
>> -{
>> -       int ret = 0;
>> -
>> -       switch (bus) {
>> -       case SPI0_BUS:
>> -               if (cs < SPI0_NUM_CS)
>> -                       ret = 1;
>> -               break;
>> -#ifdef CONFIG_SYS_SPI1
>> -       case SPI1_BUS:
>> -               if (cs < SPI1_NUM_CS)
>> -                       ret = 1;
>> -               break;
>> -#endif
>> -#ifdef CONFIG_SYS_SPI2
>> -       case SPI2_BUS:
>> -               if (cs < SPI2_NUM_CS)
>> -                       ret = 1;
>> -               break;
>> -#endif
>> -       default:
>> -               /* Invalid bus number. Do nothing */
>> -               break;
>> -       }
>> -       return ret;
>> -}
>> -
>> -void spi_cs_activate(struct spi_slave *slave)
>> -{
>> -       /* do nothing */
>> -}
>> -
>> -void spi_cs_deactivate(struct spi_slave *slave)
>> -{
>> -       /* do nothing */
>> -}
>> -
>> -void spi_init(void)
>> -{
>> -       /* do nothing */
>> -}
>> -
>> -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
>> -                       unsigned int max_hz, unsigned int mode)
>> -{
>> -       struct davinci_spi_slave        *ds;
>> -
>> -       if (!spi_cs_is_valid(bus, cs))
>> -               return NULL;
>> -
>> -       ds = spi_alloc_slave(struct davinci_spi_slave, bus, cs);
>> -       if (!ds)
>> -               return NULL;
>> -
>> -       switch (bus) {
>> -       case SPI0_BUS:
>> -               ds->regs = (struct davinci_spi_regs *)SPI0_BASE;
>> -               break;
>> -#ifdef CONFIG_SYS_SPI1
>> -       case SPI1_BUS:
>> -               ds->regs = (struct davinci_spi_regs *)SPI1_BASE;
>> -               break;
>> -#endif
>> -#ifdef CONFIG_SYS_SPI2
>> -       case SPI2_BUS:
>> -               ds->regs = (struct davinci_spi_regs *)SPI2_BASE;
>> -               break;
>> -#endif
>> -       default: /* Invalid bus number */
>> -               return NULL;
>> -       }
>> -
>> -       ds->freq = max_hz;
>> -       ds->mode = mode;
>> -
>> -       return &ds->slave;
>> -}
>> -
>> -void spi_free_slave(struct spi_slave *slave)
>> -{
>> -       struct davinci_spi_slave *ds = to_davinci_spi(slave);
>> -
>> -       free(ds);
>> -}
>> -
>> -int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
>> -            const void *dout, void *din, unsigned long flags)
>> -{
>> -       struct davinci_spi_slave *ds = to_davinci_spi(slave);
>> -
>> -       ds->cur_cs = slave->cs;
>> -
>> -       return __davinci_spi_xfer(ds, bitlen, dout, din, flags);
>> -}
>> -
>> -int spi_claim_bus(struct spi_slave *slave)
>> -{
>> -       struct davinci_spi_slave *ds = to_davinci_spi(slave);
>> -
>> -#ifdef CONFIG_SPI_HALF_DUPLEX
>> -       ds->half_duplex = true;
>> -#else
>> -       ds->half_duplex = false;
>> -#endif
>> -       return __davinci_spi_claim_bus(ds, ds->slave.cs);
>> -}
>> -
>> -void spi_release_bus(struct spi_slave *slave)
>> -{
>> -       struct davinci_spi_slave *ds = to_davinci_spi(slave);
>> -
>> -       __davinci_spi_release_bus(ds);
>> -}
>> -
>> -#else
>> -static int davinci_spi_set_speed(struct udevice *bus, uint max_hz)
>> -{
>> -       struct davinci_spi_slave *ds = dev_get_priv(bus);
>> -
>> -       debug("%s speed %u\n", __func__, max_hz);
>> -       if (max_hz > CONFIG_SYS_SPI_CLK / 2)
>> -               return -EINVAL;
>> -
>> -       ds->freq = max_hz;
>>
>>         return 0;
>>  }
>>
>> -static int davinci_spi_set_mode(struct udevice *bus, uint mode)
>> -{
>> -       struct davinci_spi_slave *ds = dev_get_priv(bus);
>> -
>> -       debug("%s mode %u\n", __func__, mode);
>> -       ds->mode = mode;
>> -
>> -       return 0;
>> -}
>> -
>> -static int davinci_spi_claim_bus(struct udevice *dev)
>> -{
>> -       struct dm_spi_slave_platdata *slave_plat =
>> -               dev_get_parent_platdata(dev);
>> -       struct udevice *bus = dev->parent;
>> -       struct davinci_spi_slave *ds = dev_get_priv(bus);
>> -
>> -       if (slave_plat->cs >= ds->num_cs) {
>> -               printf("Invalid SPI chipselect\n");
>> -               return -EINVAL;
>> -       }
>> -       ds->half_duplex = slave_plat->mode & SPI_PREAMBLE;
>> -
>> -       return __davinci_spi_claim_bus(ds, slave_plat->cs);
>> -}
>> -
>> -static int davinci_spi_release_bus(struct udevice *dev)
>> -{
>> -       struct davinci_spi_slave *ds = dev_get_priv(dev->parent);
>> -
>> -       return __davinci_spi_release_bus(ds);
>> -}
>> +static const struct dm_spi_ops davinci_spi_ops = {
>> +       .claim_bus      = davinci_spi_claim_bus,
>> +       .release_bus    = davinci_spi_release_bus,
>> +       .xfer           = davinci_spi_xfer,
>> +       .set_speed      = davinci_spi_set_speed,
>> +       .set_mode       = davinci_spi_set_mode,
>> +};
>>
>> -static int davinci_spi_xfer(struct udevice *dev, unsigned int bitlen,
>> -                           const void *dout, void *din,
>> -                           unsigned long flags)
>> +static int davinci_spi_probe(struct udevice *bus)
>>  {
>> -       struct dm_spi_slave_platdata *slave =
>> -               dev_get_parent_platdata(dev);
>> -       struct udevice *bus = dev->parent;
>>         struct davinci_spi_slave *ds = dev_get_priv(bus);
>> +       struct davinci_spi_platdata *plat = bus->platdata;
>> +       ds->regs = plat->regs;
>> +       ds->num_cs = plat->num_cs;
>>
>> -       if (slave->cs >= ds->num_cs) {
>> -               printf("Invalid SPI chipselect\n");
>> -               return -EINVAL;
>> -       }
>> -       ds->cur_cs = slave->cs;
>> -
>> -       return __davinci_spi_xfer(ds, bitlen, dout, din, flags);
>> -}
>> -
>> -static int davinci_spi_probe(struct udevice *bus)
>> -{
>> -       /* Nothing to do */
>>         return 0;
>>  }
>>
>> +#if CONFIG_IS_ENABLED(OF_CONTROL)
>
> Looking at other drivers, I wonder if this should be
> +#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
>
>
>>  static int davinci_ofdata_to_platadata(struct udevice *bus)
>>  {
>> -       struct davinci_spi_slave *ds = dev_get_priv(bus);
>> -       const void *blob = gd->fdt_blob;
>> -       int node = dev_of_offset(bus);
>> +       struct davinci_spi_platdata *plat = bus->platdata;
>> +       fdt_addr_t addr;
>>
>> -       ds->regs = devfdt_map_physmem(bus, sizeof(struct davinci_spi_regs));
>> -       if (!ds->regs) {
>> -               printf("%s: could not map device address\n", __func__);
>> +       addr = devfdt_get_addr(bus);
>> +       if (addr == FDT_ADDR_T_NONE)
>>                 return -EINVAL;
>> -       }
>> -       ds->num_cs = fdtdec_get_int(blob, node, "num-cs", 4);
>> +
>> +       plat->regs = (struct davinci_spi_regs *)addr;
>> +       plat->num_cs = fdtdec_get_int(gd->fdt_blob, dev_of_offset(bus), "num-cs", 4);
>>
>>         return 0;
>>  }
>>
>> -static const struct dm_spi_ops davinci_spi_ops = {
>> -       .claim_bus      = davinci_spi_claim_bus,
>> -       .release_bus    = davinci_spi_release_bus,
>> -       .xfer           = davinci_spi_xfer,
>> -       .set_speed      = davinci_spi_set_speed,
>> -       .set_mode       = davinci_spi_set_mode,
>> -};
>> -
>>  static const struct udevice_id davinci_spi_ids[] = {
>>         { .compatible = "ti,keystone-spi" },
>>         { .compatible = "ti,dm6441-spi" },
>>         { .compatible = "ti,da830-spi" },
>>         { }
>>  };
>> +#endif
>>
>>  U_BOOT_DRIVER(davinci_spi) = {
>>         .name = "davinci_spi",
>>         .id = UCLASS_SPI,
>> +#if CONFIG_IS_ENABLED(OF_CONTROL)
>
> Like above, should this be:
> +#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
>
> With limited SPL resources, I cannot build OF_CONTROL in SPL and
> disabling OF_CONTROL in SPL doesn't build either.
> With the modification, I can build with OF_PLATDATA enabled.
>
>>         .of_match = davinci_spi_ids,
>> -       .ops = &davinci_spi_ops,
>>         .ofdata_to_platdata = davinci_ofdata_to_platadata,
>> -       .priv_auto_alloc_size = sizeof(struct davinci_spi_slave),
>> +        .platdata_auto_alloc_size = sizeof(struct davinci_spi_platdata),
>> +#endif
>>         .probe = davinci_spi_probe,
>> +       .ops = &davinci_spi_ops,
>> +       .priv_auto_alloc_size = sizeof(struct davinci_spi_slave),
>>  };
>> -#endif
>
>
> With the above changes, I can build U-Boot, but I cannot boot with
> DM_SPL enabled.

For SPL have you initialize pladata some where in board code?


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