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>

arch/arm/Kconfig

@@ -661,6 +661,7 @@ config ARCH_EXYNOS
 	select DM
 	select DM_GPIO
 	select DM_I2C
+	select DM_ETH
 	select DM_KEYBOARD
 	select DM_SERIAL
 	select DM_SPI

arch/arm/dts/exynos5250-smdk5250.dts

@@ -41,6 +41,7 @@
 	};
 
 	sromc@12250000 {
+		compatible = "samsung,exynos5-sromc";
 		bank = <1>;
 		srom-timing = <1 9 12 1 6 1 1>;
 		width = <2>;

arch/arm/mach-exynos/include/mach/sromc.h

@@ -33,22 +33,4 @@ struct s5p_sromc {
 /* Configure the Band Width and Bank Control Regs for required SROMC Bank */
 void s5p_config_sromc(u32 srom_bank, u32 srom_bw_conf, u32 srom_bc_conf);
 
-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,
-};
-
-struct fdt_sromc {
-	u8 bank;	/* srom bank number */
-	u8 width;	/* bus width in bytes */
-	unsigned int timing[FDT_SROM_TIMING_COUNT]; /* timing parameters */
-};
-
 #endif /* __ASM_ARCH_SROMC_H_ */

board/samsung/common/Makefile

@@ -7,7 +7,7 @@ obj-$(CONFIG_USB_GADGET_DOWNLOAD) += gadget.o
 obj-$(CONFIG_MISC_COMMON) += misc.o
 
 ifndef CONFIG_SPL_BUILD
-obj-$(CONFIG_BOARD_COMMON)	+= board.o
+obj-$(CONFIG_BOARD_COMMON)	+= board.o sromc.o
 ifdef CONFIG_EXYNOS5_DT
 obj-y += exynos5-dt.o
 obj-$(CONFIG_BOARD_TYPES) += exynos5-dt-types.o

board/samsung/common/board.c

@@ -26,7 +26,6 @@
 #include <asm/arch/pinmux.h>
 #include <asm/arch/power.h>
 #include <asm/arch/system.h>
-#include <asm/arch/sromc.h>
 #include <lcd.h>
 #include <i2c.h>
 #include <mmc.h>
@@ -195,83 +194,6 @@ int power_init_board(void)
 }
 #endif
 
-#ifdef CONFIG_SMC911X
-static int decode_sromc(const void *blob, struct fdt_sromc *config)
-{
-	int err;
-	int node;
-
-	node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS5_SROMC);
-	if (node < 0) {
-		debug("Could not find SROMC node\n");
-		return node;
-	}
-
-	config->bank = fdtdec_get_int(blob, node, "bank", 0);
-	config->width = fdtdec_get_int(blob, node, "width", 2);
-
-	err = fdtdec_get_int_array(blob, node, "srom-timing", config->timing,
-			FDT_SROM_TIMING_COUNT);
-	if (err < 0) {
-		debug("Could not decode SROMC configuration Error: %s\n",
-		      fdt_strerror(err));
-		return -FDT_ERR_NOTFOUND;
-	}
-	return 0;
-}
-#endif
-
-int board_eth_init(struct bd_info *bis)
-{
-#ifdef CONFIG_SMC911X
-	u32 smc_bw_conf, smc_bc_conf;
-	struct fdt_sromc config;
-	fdt_addr_t base_addr;
-	int node;
-
-	node = decode_sromc(gd->fdt_blob, &config);
-	if (node < 0) {
-		debug("%s: Could not find sromc configuration\n", __func__);
-		return 0;
-	}
-	node = fdtdec_next_compatible(gd->fdt_blob, node, COMPAT_SMSC_LAN9215);
-	if (node < 0) {
-		debug("%s: Could not find lan9215 configuration\n", __func__);
-		return 0;
-	}
-
-	/* We now have a node, so any problems from now on are errors */
-	base_addr = fdtdec_get_addr(gd->fdt_blob, node, "reg");
-	if (base_addr == FDT_ADDR_T_NONE) {
-		debug("%s: Could not find lan9215 address\n", __func__);
-		return -1;
-	}
-
-	/* Ethernet needs data bus width of 16 bits */
-	if (config.width != 2) {
-		debug("%s: Unsupported bus width %d\n", __func__,
-		      config.width);
-		return -1;
-	}
-	smc_bw_conf = SROMC_DATA16_WIDTH(config.bank)
-			| SROMC_BYTE_ENABLE(config.bank);
-
-	smc_bc_conf = SROMC_BC_TACS(config.timing[FDT_SROM_TACS])   |
-			SROMC_BC_TCOS(config.timing[FDT_SROM_TCOS]) |
-			SROMC_BC_TACC(config.timing[FDT_SROM_TACC]) |
-			SROMC_BC_TCOH(config.timing[FDT_SROM_TCOH]) |
-			SROMC_BC_TAH(config.timing[FDT_SROM_TAH])   |
-			SROMC_BC_TACP(config.timing[FDT_SROM_TACP]) |
-			SROMC_BC_PMC(config.timing[FDT_SROM_PMC]);
-
-	/* Select and configure the SROMC bank */
-	exynos_pinmux_config(PERIPH_ID_SROMC, config.bank);
-	s5p_config_sromc(config.bank, smc_bw_conf, smc_bc_conf);
-	return smc911x_initialize(0, base_addr);
-#endif
-	return 0;
-}
-
 #if defined(CONFIG_DISPLAY_BOARDINFO) || defined(CONFIG_DISPLAY_BOARDINFO_LATE)
 int checkboard(void)
 {

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,
+};

board/samsung/smdkv310/smdkv310.c

@@ -73,15 +73,6 @@ int dram_init_banksize(void)
 	return 0;
 }
 
-int board_eth_init(struct bd_info *bis)
-{
-	int rc = 0;
-#ifdef CONFIG_SMC911X
-	rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
-#endif
-	return rc;
-}
-
 #ifdef CONFIG_DISPLAY_BOARDINFO
 int checkboard(void)
 {

configs/arndale_defconfig

@@ -37,7 +37,6 @@ CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_S5P=y
 CONFIG_MTD=y
 CONFIG_SMC911X=y
-CONFIG_SMC911X_BASE=0x5000000
 CONFIG_SOUND=y
 CONFIG_I2S=y
 CONFIG_I2S_SAMSUNG=y

configs/odroid-xu3_defconfig

@@ -46,7 +46,6 @@ CONFIG_SUPPORT_EMMC_BOOT=y
 CONFIG_MMC_DW=y
 CONFIG_MTD=y
 CONFIG_SMC911X=y
-CONFIG_SMC911X_BASE=0x5000000
 CONFIG_DM_PMIC=y
 CONFIG_PMIC_S2MPS11=y
 CONFIG_DM_REGULATOR=y

configs/peach-pi_defconfig

@@ -53,7 +53,6 @@ CONFIG_SF_DEFAULT_SPEED=50000000
 CONFIG_SPI_FLASH_GIGADEVICE=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SMC911X=y
-CONFIG_SMC911X_BASE=0x5000000
 CONFIG_DM_PMIC=y
 CONFIG_PMIC_TPS65090=y
 CONFIG_DM_REGULATOR=y

configs/peach-pit_defconfig

@@ -52,7 +52,6 @@ CONFIG_SF_DEFAULT_SPEED=50000000
 CONFIG_SPI_FLASH_GIGADEVICE=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SMC911X=y
-CONFIG_SMC911X_BASE=0x5000000
 CONFIG_DM_PMIC=y
 CONFIG_PMIC_TPS65090=y
 CONFIG_DM_REGULATOR=y

configs/smdk5250_defconfig

@@ -48,7 +48,6 @@ CONFIG_SF_DEFAULT_SPEED=50000000
 CONFIG_SPI_FLASH_GIGADEVICE=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SMC911X=y
-CONFIG_SMC911X_BASE=0x5000000
 CONFIG_DM_PMIC=y
 CONFIG_DM_PMIC_MAX77686=y
 CONFIG_DM_REGULATOR=y

configs/smdk5420_defconfig

@@ -43,7 +43,6 @@ CONFIG_SF_DEFAULT_SPEED=50000000
 CONFIG_SPI_FLASH_GIGADEVICE=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SMC911X=y
-CONFIG_SMC911X_BASE=0x5000000
 CONFIG_DM_PMIC=y
 CONFIG_DM_REGULATOR=y
 CONFIG_EXYNOS_SPI=y

configs/smdkv310_defconfig

@@ -28,6 +28,5 @@ CONFIG_MMC_SDHCI_SDMA=y
 CONFIG_MMC_SDHCI_S5P=y
 CONFIG_MTD=y
 CONFIG_SMC911X=y
-CONFIG_SMC911X_BASE=0x5000000
 CONFIG_USB=y
 CONFIG_DM_USB=y

configs/snow_defconfig

@@ -58,7 +58,6 @@ CONFIG_SF_DEFAULT_SPEED=50000000
 CONFIG_SPI_FLASH_GIGADEVICE=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SMC911X=y
-CONFIG_SMC911X_BASE=0x5000000
 CONFIG_DM_PMIC=y
 CONFIG_DM_PMIC_MAX77686=y
 CONFIG_PMIC_S5M8767=y

configs/spring_defconfig

@@ -58,7 +58,6 @@ CONFIG_SF_DEFAULT_SPEED=50000000
 CONFIG_SPI_FLASH_GIGADEVICE=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SMC911X=y
-CONFIG_SMC911X_BASE=0x5000000
 CONFIG_DM_PMIC=y
 CONFIG_DM_PMIC_MAX77686=y
 CONFIG_PMIC_S5M8767=y

include/fdtdec.h

@@ -140,8 +140,6 @@ enum fdt_compat_id {
 					/* Tegra124 XUSB pad controller */
 	COMPAT_NVIDIA_TEGRA210_XUSB_PADCTL,
 					/* Tegra210 XUSB pad controller */
-	COMPAT_SMSC_LAN9215,		/* SMSC 10/100 Ethernet LAN9215 */
-	COMPAT_SAMSUNG_EXYNOS5_SROMC,	/* Exynos5 SROMC */
 	COMPAT_SAMSUNG_EXYNOS_USB_PHY,	/* Exynos phy controller for usb2.0 */
 	COMPAT_SAMSUNG_EXYNOS5_USB3_PHY,/* Exynos phy controller for usb3.0 */
 	COMPAT_SAMSUNG_EXYNOS_TMU,	/* Exynos TMU */

lib/fdtdec.c

@@ -47,8 +47,6 @@ static const char * const compat_names[COMPAT_COUNT] = {
 	COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
 	COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
 	COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
-	COMPAT(SMSC_LAN9215, "smsc,lan9215"),
-	COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
 	COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
 	COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
 	COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),