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>
diff --git a/board/samsung/common/sromc.c b/board/samsung/common/sromc.c
new file mode 100644
index 0000000..76e37df
--- /dev/null
+++ b/board/samsung/common/sromc.c
@@ -0,0 +1,76 @@
+// 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,
+};