spi.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/mmio.h>
#include <assert.h>
#include <spi_flash.h>
#include <soc/addressmap.h>
#include <soc/flash_controller_common.h>
#include <soc/gpio.h>
#include <soc/spi.h>
 
struct mtk_spi_bus spi_bus[SPI_BUS_NUMBER] = {
        {
                .regs = (void *)SPI_BASE,
                .cs_gpio = GPIO(MSDC2_CMD),
        }
};
 
void mtk_spi_set_gpio_pinmux(unsigned int bus,
                             enum spi_pad_mask pad_select)
{
        /* TODO: implement support for other pads when needed */
        assert(pad_select == SPI_PAD1_MASK);
        gpio_set_mode(GPIO(MSDC2_DAT2), PAD_MSDC2_DAT2_FUNC_SPI_CK_1);
        gpio_set_mode(GPIO(MSDC2_DAT3), PAD_MSDC2_DAT3_FUNC_SPI_MI_1);
        gpio_set_mode(GPIO(MSDC2_CLK), PAD_MSDC2_CLK_FUNC_SPI_MO_1);
        gpio_set_mode(GPIO(MSDC2_CMD), 0);
}
 
static const struct spi_ctrlr spi_flash_ctrlr = {
        .max_xfer_size = 65535,
        .flash_probe = mtk_spi_flash_probe,
};
 
const struct spi_ctrlr_buses spi_ctrlr_bus_map[] = {
        {
                .ctrlr = &spi_ctrlr,
                .bus_start = 0,
                .bus_end = SPI_BUS_NUMBER - 1,
        },
        {
                .ctrlr = &spi_flash_ctrlr,
                .bus_start = CONFIG_BOOT_DEVICE_SPI_FLASH_BUS,
                .bus_end = CONFIG_BOOT_DEVICE_SPI_FLASH_BUS,
        },
};
 
const size_t spi_ctrlr_bus_map_count = ARRAY_SIZE(spi_ctrlr_bus_map);