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https://github.com/AsahiLinux/u-boot
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5e19f4aa13
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>
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2021 Google LLC
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*/
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#define LOG_CATEGORY UCLASS_ETH
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#include <common.h>
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#include <dm.h>
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#include <log.h>
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#include <asm/arch/pinmux.h>
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#include <asm/arch/sromc.h>
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enum {
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FDT_SROM_PMC,
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FDT_SROM_TACP,
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FDT_SROM_TAH,
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FDT_SROM_TCOH,
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FDT_SROM_TACC,
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FDT_SROM_TCOS,
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FDT_SROM_TACS,
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FDT_SROM_TIMING_COUNT,
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};
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static int exyno5_sromc_probe(struct udevice *dev)
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{
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u32 timing[FDT_SROM_TIMING_COUNT]; /* timing parameters */
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u32 smc_bw_conf, smc_bc_conf;
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int bank; /* srom bank number */
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int width; /* bus width in bytes */
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int ret;
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if (!IS_ENABLED(CONFIG_SMC911X))
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return 0;
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bank = dev_read_s32_default(dev, "bank", 0);
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width = dev_read_s32_default(dev, "width", 2);
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/* Ethernet needs data bus width of 16 bits */
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if (width != 2) {
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log_debug("Unsupported bus width %d\n", width);
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return log_msg_ret("width", -EINVAL);
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}
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ret = dev_read_u32_array(dev, "srom-timing", timing,
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FDT_SROM_TIMING_COUNT);
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if (ret)
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return log_msg_ret("sromc", -EINVAL);
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smc_bw_conf = SROMC_DATA16_WIDTH(bank) | SROMC_BYTE_ENABLE(bank);
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smc_bc_conf = SROMC_BC_TACS(timing[FDT_SROM_TACS]) |
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SROMC_BC_TCOS(timing[FDT_SROM_TCOS]) |
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SROMC_BC_TACC(timing[FDT_SROM_TACC]) |
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SROMC_BC_TCOH(timing[FDT_SROM_TCOH]) |
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SROMC_BC_TAH(timing[FDT_SROM_TAH]) |
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SROMC_BC_TACP(timing[FDT_SROM_TACP]) |
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SROMC_BC_PMC(timing[FDT_SROM_PMC]);
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/* Select and configure the SROMC bank */
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exynos_pinmux_config(PERIPH_ID_SROMC, bank);
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s5p_config_sromc(bank, smc_bw_conf, smc_bc_conf);
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return 0;
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}
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static const struct udevice_id exyno5_sromc_ids[] = {
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{ .compatible = "samsung,exynos5-sromc" },
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{}
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};
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U_BOOT_DRIVER(exyno5_sromc) = {
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.name = "exyno5_sromc",
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.id = UCLASS_SIMPLE_BUS,
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.of_match = exyno5_sromc_ids,
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.probe = exyno5_sromc_probe,
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};
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