mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 16:38:53 +09:00
![Allen Martin](/assets/img/avatar_default.png)
Add driver for tegra114 SPI controller. This controller is not compatible with either the tegra20 or tegra30 controllers, so it requires a new driver. Signed-off-by: Allen Martin <amartin@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com>
187 lines
4.8 KiB
C
187 lines
4.8 KiB
C
/*
|
|
* Common fdt based SPI driver front end
|
|
*
|
|
* Copyright (c) 2013 NVIDIA Corporation
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <malloc.h>
|
|
#include <asm/io.h>
|
|
#include <asm/gpio.h>
|
|
#include <asm/arch/clock.h>
|
|
#include <asm/arch-tegra/clk_rst.h>
|
|
#include <asm/arch-tegra20/tegra20_sflash.h>
|
|
#include <asm/arch-tegra20/tegra20_slink.h>
|
|
#include <asm/arch-tegra114/tegra114_spi.h>
|
|
#include <spi.h>
|
|
#include <fdtdec.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
struct fdt_spi_driver {
|
|
int compat;
|
|
int max_ctrls;
|
|
int (*init)(int *node_list, int count);
|
|
int (*claim_bus)(struct spi_slave *slave);
|
|
int (*release_bus)(struct spi_slave *slave);
|
|
int (*cs_is_valid)(unsigned int bus, unsigned int cs);
|
|
struct spi_slave *(*setup_slave)(unsigned int bus, unsigned int cs,
|
|
unsigned int max_hz, unsigned int mode);
|
|
void (*free_slave)(struct spi_slave *slave);
|
|
void (*cs_activate)(struct spi_slave *slave);
|
|
void (*cs_deactivate)(struct spi_slave *slave);
|
|
int (*xfer)(struct spi_slave *slave, unsigned int bitlen,
|
|
const void *data_out, void *data_in, unsigned long flags);
|
|
};
|
|
|
|
static struct fdt_spi_driver fdt_spi_drivers[] = {
|
|
#ifdef CONFIG_TEGRA20_SFLASH
|
|
{
|
|
.compat = COMPAT_NVIDIA_TEGRA20_SFLASH,
|
|
.max_ctrls = 1,
|
|
.init = tegra20_spi_init,
|
|
.claim_bus = tegra20_spi_claim_bus,
|
|
.cs_is_valid = tegra20_spi_cs_is_valid,
|
|
.setup_slave = tegra20_spi_setup_slave,
|
|
.free_slave = tegra20_spi_free_slave,
|
|
.cs_activate = tegra20_spi_cs_activate,
|
|
.cs_deactivate = tegra20_spi_cs_deactivate,
|
|
.xfer = tegra20_spi_xfer,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_TEGRA20_SLINK
|
|
{
|
|
.compat = COMPAT_NVIDIA_TEGRA20_SLINK,
|
|
.max_ctrls = CONFIG_TEGRA_SLINK_CTRLS,
|
|
.init = tegra30_spi_init,
|
|
.claim_bus = tegra30_spi_claim_bus,
|
|
.cs_is_valid = tegra30_spi_cs_is_valid,
|
|
.setup_slave = tegra30_spi_setup_slave,
|
|
.free_slave = tegra30_spi_free_slave,
|
|
.cs_activate = tegra30_spi_cs_activate,
|
|
.cs_deactivate = tegra30_spi_cs_deactivate,
|
|
.xfer = tegra30_spi_xfer,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_TEGRA114_SPI
|
|
{
|
|
.compat = COMPAT_NVIDIA_TEGRA114_SPI,
|
|
.max_ctrls = CONFIG_TEGRA114_SPI_CTRLS,
|
|
.init = tegra114_spi_init,
|
|
.claim_bus = tegra114_spi_claim_bus,
|
|
.cs_is_valid = tegra114_spi_cs_is_valid,
|
|
.setup_slave = tegra114_spi_setup_slave,
|
|
.free_slave = tegra114_spi_free_slave,
|
|
.cs_activate = tegra114_spi_cs_activate,
|
|
.cs_deactivate = tegra114_spi_cs_deactivate,
|
|
.xfer = tegra114_spi_xfer,
|
|
},
|
|
#endif
|
|
};
|
|
|
|
static struct fdt_spi_driver *driver;
|
|
|
|
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
|
|
{
|
|
if (!driver)
|
|
return 0;
|
|
else if (!driver->cs_is_valid)
|
|
return 1;
|
|
else
|
|
return driver->cs_is_valid(bus, cs);
|
|
}
|
|
|
|
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
|
|
unsigned int max_hz, unsigned int mode)
|
|
{
|
|
if (!driver || !driver->setup_slave)
|
|
return NULL;
|
|
|
|
return driver->setup_slave(bus, cs, max_hz, mode);
|
|
}
|
|
|
|
void spi_free_slave(struct spi_slave *slave)
|
|
{
|
|
if (driver && driver->free_slave)
|
|
return driver->free_slave(slave);
|
|
}
|
|
|
|
static int spi_init_driver(struct fdt_spi_driver *driver)
|
|
{
|
|
int count;
|
|
int node_list[driver->max_ctrls];
|
|
|
|
count = fdtdec_find_aliases_for_id(gd->fdt_blob, "spi",
|
|
driver->compat,
|
|
node_list,
|
|
driver->max_ctrls);
|
|
return driver->init(node_list, count);
|
|
}
|
|
|
|
void spi_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(fdt_spi_drivers); i++) {
|
|
driver = &fdt_spi_drivers[i];
|
|
if (!spi_init_driver(driver))
|
|
break;
|
|
}
|
|
if (i == ARRAY_SIZE(fdt_spi_drivers))
|
|
driver = NULL;
|
|
}
|
|
|
|
int spi_claim_bus(struct spi_slave *slave)
|
|
{
|
|
if (!driver)
|
|
return 1;
|
|
if (!driver->claim_bus)
|
|
return 0;
|
|
|
|
return driver->claim_bus(slave);
|
|
}
|
|
|
|
void spi_release_bus(struct spi_slave *slave)
|
|
{
|
|
if (driver && driver->release_bus)
|
|
driver->release_bus(slave);
|
|
}
|
|
|
|
void spi_cs_activate(struct spi_slave *slave)
|
|
{
|
|
if (driver && driver->cs_activate)
|
|
driver->cs_activate(slave);
|
|
}
|
|
|
|
void spi_cs_deactivate(struct spi_slave *slave)
|
|
{
|
|
if (driver && driver->cs_deactivate)
|
|
driver->cs_deactivate(slave);
|
|
}
|
|
|
|
int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
|
|
const void *data_out, void *data_in, unsigned long flags)
|
|
{
|
|
if (!driver || !driver->xfer)
|
|
return -1;
|
|
|
|
return driver->xfer(slave, bitlen, data_out, data_in, flags);
|
|
}
|