u-boot/board/samsung/common/sromc.c
Simon Glass 5e19f4aa13 samsung: exynos: Convert SROMC interface to a driver
Add a bus driver for this and use it to configure the bus parameters for
the Ethernet interface. Drop the old pre-driver-model code.

Switch over to use driver model for Ethernet.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2021-07-27 10:34:27 +09:00

77 lines
1.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2021 Google LLC
*/
#define LOG_CATEGORY UCLASS_ETH
#include <common.h>
#include <dm.h>
#include <log.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/sromc.h>
enum {
FDT_SROM_PMC,
FDT_SROM_TACP,
FDT_SROM_TAH,
FDT_SROM_TCOH,
FDT_SROM_TACC,
FDT_SROM_TCOS,
FDT_SROM_TACS,
FDT_SROM_TIMING_COUNT,
};
static int exyno5_sromc_probe(struct udevice *dev)
{
u32 timing[FDT_SROM_TIMING_COUNT]; /* timing parameters */
u32 smc_bw_conf, smc_bc_conf;
int bank; /* srom bank number */
int width; /* bus width in bytes */
int ret;
if (!IS_ENABLED(CONFIG_SMC911X))
return 0;
bank = dev_read_s32_default(dev, "bank", 0);
width = dev_read_s32_default(dev, "width", 2);
/* Ethernet needs data bus width of 16 bits */
if (width != 2) {
log_debug("Unsupported bus width %d\n", width);
return log_msg_ret("width", -EINVAL);
}
ret = dev_read_u32_array(dev, "srom-timing", timing,
FDT_SROM_TIMING_COUNT);
if (ret)
return log_msg_ret("sromc", -EINVAL);
smc_bw_conf = SROMC_DATA16_WIDTH(bank) | SROMC_BYTE_ENABLE(bank);
smc_bc_conf = SROMC_BC_TACS(timing[FDT_SROM_TACS]) |
SROMC_BC_TCOS(timing[FDT_SROM_TCOS]) |
SROMC_BC_TACC(timing[FDT_SROM_TACC]) |
SROMC_BC_TCOH(timing[FDT_SROM_TCOH]) |
SROMC_BC_TAH(timing[FDT_SROM_TAH]) |
SROMC_BC_TACP(timing[FDT_SROM_TACP]) |
SROMC_BC_PMC(timing[FDT_SROM_PMC]);
/* Select and configure the SROMC bank */
exynos_pinmux_config(PERIPH_ID_SROMC, bank);
s5p_config_sromc(bank, smc_bw_conf, smc_bc_conf);
return 0;
}
static const struct udevice_id exyno5_sromc_ids[] = {
{ .compatible = "samsung,exynos5-sromc" },
{}
};
U_BOOT_DRIVER(exyno5_sromc) = {
.name = "exyno5_sromc",
.id = UCLASS_SIMPLE_BUS,
.of_match = exyno5_sromc_ids,
.probe = exyno5_sromc_probe,
};