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/*
* This file is part of the coreboot project.
*
* Copyright 2018 MediaTek Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* 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.
*/
#include <device/mmio.h>
#include <assert.h>
#include <spi_flash.h>
#include <soc/addressmap.h>
#include <soc/flash_controller.h>
#include <soc/gpio.h>
#include <soc/spi.h>
struct mtk_spi_bus spi_bus[SPI_BUS_NUMBER] = {
{
.regs = (void *)SPI0_BASE,
.cs_gpio = GPIO(SPI_CSB),
},
{
.regs = (void *)SPI1_BASE,
.cs_gpio = GPIO(SPI1_CSB),
},
{
.regs = (void *)SPI2_BASE,
.cs_gpio = GPIO(EINT0),
},
{
.regs = (void *)SPI3_BASE,
.cs_gpio = GPIO(DPI_D9),
},
{
.regs = (void *)SPI4_BASE,
.cs_gpio = GPIO(DPI_D5),
},
{
.regs = (void *)SPI5_BASE,
.cs_gpio = GPIO(DPI_D1),
}
};
struct pad_func {
u8 pin_id;
u8 func;
};
#define PAD_FUNC(name, func) {PAD_##name##_ID, PAD_##name##_FUNC_##func}
#define PAD_FUNC_GPIO(name) {PAD_##name##_ID, 0}
static const struct pad_func pad0_funcs[SPI_BUS_NUMBER][4] = {
{
PAD_FUNC(SPI_MI, SPI0_MI),
PAD_FUNC_GPIO(SPI_CSB),
PAD_FUNC(SPI_MO, SPI0_MO),
PAD_FUNC(SPI_CLK, SPI0_CLK),
},
{
PAD_FUNC(SPI1_MI, SPI1_A_MI),
PAD_FUNC_GPIO(SPI1_CSB),
PAD_FUNC(SPI1_MO, SPI1_A_MO),
PAD_FUNC(SPI1_CLK, SPI1_A_CLK),
},
{
PAD_FUNC(KPCOL1, SPI2_MI),
PAD_FUNC_GPIO(EINT0),
PAD_FUNC(EINT1, SPI2_MO),
PAD_FUNC(EINT2, SPI2_CLK),
},
{
PAD_FUNC(DPI_D8, SPI3_MI),
PAD_FUNC_GPIO(DPI_D9),
PAD_FUNC(DPI_D10, SPI3_MO),
PAD_FUNC(DPI_D11, SPI3_CLK),
},
{
PAD_FUNC(DPI_D4, SPI4_MI),
PAD_FUNC_GPIO(DPI_D5),
PAD_FUNC(DPI_D6, SPI4_MO),
PAD_FUNC(DPI_D7, SPI4_CLK),
},
{
PAD_FUNC(DPI_D0, SPI5_MI),
PAD_FUNC_GPIO(DPI_D1),
PAD_FUNC(DPI_D2, SPI5_MO),
PAD_FUNC(DPI_D3, SPI5_CLK),
}
};
static const struct pad_func bus1_pad1_funcs[4] = {
PAD_FUNC(EINT7, SPI1_B_MI),
PAD_FUNC_GPIO(EINT8),
PAD_FUNC(EINT9, SPI1_B_MO),
PAD_FUNC(EINT10, SPI1_B_CLK),
};
void mtk_spi_set_gpio_pinmux(unsigned int bus, enum spi_pad_mask pad_select)
{
assert(bus < SPI_BUS_NUMBER);
const struct pad_func *ptr;
if (pad_select == SPI_PAD0_MASK) {
ptr = pad0_funcs[bus];
} else {
assert(bus == 1 && pad_select == SPI_PAD1_MASK);
ptr = bus1_pad1_funcs;
}
for (int i = 0; i < 4; i++)
gpio_set_mode((gpio_t){.id = ptr[i].pin_id}, ptr[i].func);
}
void mtk_spi_set_timing(struct mtk_spi_regs *regs, u32 sck_ticks, u32 cs_ticks,
unsigned int tick_dly)
{
write32(®s->spi_cfg0_reg,
((cs_ticks - 1) << SPI_CFG0_CS_HOLD_SHIFT) |
((cs_ticks - 1) << SPI_CFG0_CS_SETUP_SHIFT));
write32(®s->spi_cfg2_reg,
((sck_ticks - 1) << SPI_CFG2_SCK_HIGH_SHIFT) |
((sck_ticks - 1) << SPI_CFG2_SCK_LOW_SHIFT));
clrsetbits_le32(®s->spi_cfg1_reg, SPI_CFG1_TICK_DLY_MASK |
SPI_CFG1_CS_IDLE_MASK,
(tick_dly << SPI_CFG1_TICK_DLY_SHIFT) |
((cs_ticks - 1) << SPI_CFG1_CS_IDLE_SHIFT));
}
const struct spi_ctrlr_buses spi_ctrlr_bus_map[] = {
{
.ctrlr = &spi_ctrlr,
.bus_start = 0,
.bus_end = SPI_BUS_NUMBER - 1,
},
};
const size_t spi_ctrlr_bus_map_count = ARRAY_SIZE(spi_ctrlr_bus_map);
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