[U-Boot] [PATCH] spi: davinci: Full dm conversion
Adam Ford
aford173 at gmail.com
Fri Aug 10 13:41:27 UTC 2018
On Fri, Aug 10, 2018 at 8:38 AM Jagan Teki <jagan at amarulasolutions.com> wrote:
>
> 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?
I didn't do that yet, which is probably what part of the problem is.
I hadn't gotten around to trying to figure out what the correct method
is. Do you have an example I can follow?
adam
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