Merge tag 'arc-fixes-for-2020.01-rc2' of https://gitlab.denx.de/u-boot/custodians/u-boot-arc

ARC fixes for v2020.01-rc2

The main change is move to DM_MMC of yet 2 another ARC boards:
AXS101 & IoTDK.

Among that we improve handling of stock-formatted SD-cards of high volume
on EM SDP as well as introduction of reset driver for HSDK which is required
for prepser reinitialization of some peripherals like USB etc.

13 files changed, 201 insertions, 63 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 42b5959d90..a310b8478f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -94,6 +94,13 @@ L:	uboot-snps-arc@synopsys.com
 F:	doc/device-tree-bindings/gpio/snps,creg-gpio.txt
 F:	drivers/gpio/hsdk-creg-gpio.c
 
+ARC HSDK RESET
+M:	Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S:	Maintained
+L:	uboot-snps-arc@synopsys.com
+F:	include/dt-bindings/reset/snps,hsdk-reset.h
+F:	drivers/reset/reset-hsdk.c
+
 ARC SYNOPSYS DW MMC EXTENSIONS
 M:	Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
 S:	Maintained
diff --git a/arch/arc/dts/emsdp.dts b/arch/arc/dts/emsdp.dts
index d307b95d8e..dbebdb4e76 100644
--- a/arch/arc/dts/emsdp.dts
+++ b/arch/arc/dts/emsdp.dts
@@ -32,4 +32,27 @@
 		reg-shift = <2>;
 		reg-io-width = <4>;
 	};
+
+	mmcclk_biu: mmcclk-biu {
+		compatible = "fixed-clock";
+		clock-frequency = <50000000>;
+		#clock-cells = <0>;
+	};
+
+	mmcclk_ciu: mmcclk-ciu {
+		compatible = "fixed-clock";
+		clock-frequency = <100000000>;
+		#clock-cells = <0>;
+	};
+
+	mmc: mmc0@f0010000 {
+		compatible = "snps,dw-mshc";
+		reg = <0xf0010000 0x400>;
+		bus-width = <4>;
+		fifo-depth = <256>;
+		clocks = <&mmcclk_biu>, <&mmcclk_ciu>;
+		clock-names = "biu", "ciu";
+		max-frequency = <25000000>;
+	};
+
 };
diff --git a/arch/arc/dts/iot_devkit.dts b/arch/arc/dts/iot_devkit.dts
index ebf5a950f0..c0173fa5ab 100644
--- a/arch/arc/dts/iot_devkit.dts
+++ b/arch/arc/dts/iot_devkit.dts
@@ -42,4 +42,26 @@
 		compatible = "nop-phy";
 		#phy-cells = <0>;
 	};
+
+	mmcclk_biu: mmcclk-biu {
+		compatible = "fixed-clock";
+		clock-frequency = <50000000>;
+		#clock-cells = <0>;
+	};
+
+	mmcclk_ciu: mmcclk-ciu {
+		compatible = "fixed-clock";
+		clock-frequency = <50000000>;
+		#clock-cells = <0>;
+	};
+
+	mmc: mmc0@f000b000 {
+		compatible = "snps,dw-mshc";
+		reg = <0xf000b000 0x400>;
+		bus-width = <4>;
+		fifo-depth = <128>;
+		clocks = <&mmcclk_biu>, <&mmcclk_ciu>;
+		clock-names = "biu", "ciu";
+		max-frequency = <25000000>;
+	};
 };
diff --git a/board/synopsys/emsdp/README b/board/synopsys/emsdp/README
index 034062e397..036554c4d5 100644
--- a/board/synopsys/emsdp/README
+++ b/board/synopsys/emsdp/README
@@ -79,5 +79,5 @@ ARC EM Software Development Platform (AKA EMSDP)
 
       2.1. In case of proprietary MetaWare debugger run:
       ------------------------->8----------------------
-      mdb -dll=opxdarc.so -OK -preloadexec="eval *(int*)0xf0001000=0" u-boot
+      mdb -digilent -OK -preloadexec="eval *(int*)0xf0001000=0" u-boot
       ------------------------->8----------------------
diff --git a/board/synopsys/emsdp/emsdp.c b/board/synopsys/emsdp/emsdp.c
index 7a3fd5b7f2..5ba9f862e1 100644
--- a/board/synopsys/emsdp/emsdp.c
+++ b/board/synopsys/emsdp/emsdp.c
@@ -85,35 +85,6 @@ int board_early_init_r(void)
 	return 0;
 }
 
-int board_mmc_init(bd_t *bis)
-{
-	struct dwmci_host *host = NULL;
-
-	host = malloc(sizeof(struct dwmci_host));
-	if (!host) {
-		printf("dwmci_host malloc fail!\n");
-		return 1;
-	}
-
-	memset(host, 0, sizeof(struct dwmci_host));
-	host->name = "Synopsys Mobile storage";
-	host->ioaddr = SDIO_BASE;
-	host->buswidth = 4;
-	host->dev_index = 0;
-	host->bus_hz = 50000000;
-
-	add_dwmci(host, host->bus_hz / 2, 400000);
-
-	return 0;
-}
-
-int board_mmc_getcd(struct mmc *mmc)
-{
-	struct dwmci_host *host = mmc->priv;
-
-	return !(dwmci_readl(host, DWMCI_CDETECT) & 1);
-}
-
 #define CREG_BASE		0xF0001000
 #define CREG_BOOT		(void *)(CREG_BASE + 0x0FF0)
 #define CREG_IP_SW_RESET	(void *)(CREG_BASE + 0x0FF0)
diff --git a/board/synopsys/iot_devkit/iot_devkit.c b/board/synopsys/iot_devkit/iot_devkit.c
index 8424e09bd3..9dbdc128f8 100644
--- a/board/synopsys/iot_devkit/iot_devkit.c
+++ b/board/synopsys/iot_devkit/iot_devkit.c
@@ -145,38 +145,6 @@ int mach_cpu_init(void)
 	return set_cpu_freq(gd->cpu_clk);
 }
 
-#define ARC_PERIPHERAL_BASE	0xF0000000
-#define SDIO_BASE		(ARC_PERIPHERAL_BASE + 0xB000)
-
-int board_mmc_init(bd_t *bis)
-{
-	struct dwmci_host *host = NULL;
-
-	host = malloc(sizeof(struct dwmci_host));
-	if (!host) {
-		printf("dwmci_host malloc fail!\n");
-		return -ENOMEM;
-	}
-
-	memset(host, 0, sizeof(struct dwmci_host));
-	host->name = "Synopsys Mobile storage";
-	host->ioaddr = (void *)SDIO_BASE;
-	host->buswidth = 4;
-	host->dev_index = 0;
-	host->bus_hz = 50000000;
-
-	add_dwmci(host, host->bus_hz / 2, 400000);
-
-	return 0;
-}
-
-int board_mmc_getcd(struct mmc *mmc)
-{
-	struct dwmci_host *host = mmc->priv;
-
-	return !(dwmci_readl(host, DWMCI_CDETECT) & 1);
-}
-
 #define IOTDK_RESET_SEQ		0x55AA6699
 
 void reset_cpu(ulong addr)
diff --git a/configs/axs101_defconfig b/configs/axs101_defconfig
index 0bfb532fc7..38c8ae998f 100644
--- a/configs/axs101_defconfig
+++ b/configs/axs101_defconfig
@@ -35,7 +35,9 @@ CONFIG_DM=y
 CONFIG_DM_GPIO=y
 CONFIG_HSDK_CREG_GPIO=y
 CONFIG_MMC=y
+CONFIG_DM_MMC=y
 CONFIG_MMC_DW=y
+CONFIG_MMC_DW_SNPS=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
diff --git a/configs/emsdp_defconfig b/configs/emsdp_defconfig
index 5e55e3e2b2..09fe388e58 100644
--- a/configs/emsdp_defconfig
+++ b/configs/emsdp_defconfig
@@ -24,9 +24,11 @@ CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 # CONFIG_NET is not set
 CONFIG_DM=y
 CONFIG_MMC=y
+CONFIG_DM_MMC=y
 CONFIG_MMC_DW=y
+CONFIG_MMC_DW_SNPS=y
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
-CONFIG_FS_FAT_MAX_CLUSTSIZE=4096
+CONFIG_FS_FAT_MAX_CLUSTSIZE=32768
 CONFIG_USE_PRIVATE_LIBGCC=y
 CONFIG_PANIC_HANG=y
diff --git a/configs/iot_devkit_defconfig b/configs/iot_devkit_defconfig
index 24bbe3fc5d..42278d4fb1 100644
--- a/configs/iot_devkit_defconfig
+++ b/configs/iot_devkit_defconfig
@@ -29,7 +29,9 @@ CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 # CONFIG_NET is not set
 CONFIG_DM=y
 CONFIG_MMC=y
+CONFIG_DM_MMC=y
 CONFIG_MMC_DW=y
+CONFIG_MMC_DW_SNPS=y
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index cff00820e4..75ccd65799 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -91,6 +91,13 @@ config RESET_ROCKCHIP
 	  though is that some reset signals, like I2C or MISC reset multiple
 	  devices.
 
+config RESET_HSDK
+	bool "Synopsys HSDK Reset Driver"
+	depends on DM_RESET && TARGET_HSDK
+	default y
+	help
+	  This enables the reset controller driver for HSDK board.
+
 config RESET_MESON
 	bool "Reset controller driver for Amlogic Meson SoCs"
 	depends on DM_RESET && ARCH_MESON
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 8102d8db29..0a044d5d8c 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_STM32_RESET) += stm32-reset.o
 obj-$(CONFIG_TEGRA_CAR_RESET) += tegra-car-reset.o
 obj-$(CONFIG_TEGRA186_RESET) += tegra186-reset.o
 obj-$(CONFIG_RESET_TI_SCI) += reset-ti-sci.o
+obj-$(CONFIG_RESET_HSDK) += reset-hsdk.o
 obj-$(CONFIG_RESET_BCM6345) += reset-bcm6345.o
 obj-$(CONFIG_RESET_UNIPHIER) += reset-uniphier.o
 obj-$(CONFIG_AST2500_RESET) += ast2500-reset.o
diff --git a/drivers/reset/reset-hsdk.c b/drivers/reset/reset-hsdk.c
new file mode 100644
index 0000000000..213d6c87be
--- /dev/null
+++ b/drivers/reset/reset-hsdk.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * HSDK SoC Reset Controller driver
+ *
+ * Copyright (C) 2019 Synopsys, Inc. All rights reserved.
+ * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+ */
+
+#include <asm/io.h>
+#include <common.h>
+#include <dm.h>
+#include <linux/iopoll.h>
+#include <reset-uclass.h>
+
+struct hsdk_rst {
+	void __iomem		*regs_ctl;
+	void __iomem		*regs_rst;
+};
+
+static const u32 rst_map[] = {
+	BIT(16), /* APB_RST  */
+	BIT(17), /* AXI_RST  */
+	BIT(18), /* ETH_RST  */
+	BIT(19), /* USB_RST  */
+	BIT(20), /* SDIO_RST */
+	BIT(21), /* HDMI_RST */
+	BIT(22), /* GFX_RST  */
+	BIT(25), /* DMAC_RST */
+	BIT(31), /* EBI_RST  */
+};
+
+#define HSDK_MAX_RESETS			ARRAY_SIZE(rst_map)
+
+#define CGU_SYS_RST_CTRL		0x0
+#define CGU_IP_SW_RESET			0x0
+#define CGU_IP_SW_RESET_DELAY_SHIFT	16
+#define CGU_IP_SW_RESET_DELAY_MASK	GENMASK(31, CGU_IP_SW_RESET_DELAY_SHIFT)
+#define CGU_IP_SW_RESET_DELAY		0
+#define CGU_IP_SW_RESET_RESET		BIT(0)
+#define SW_RESET_TIMEOUT		10000
+
+static void hsdk_reset_config(struct hsdk_rst *rst, unsigned long id)
+{
+	writel(rst_map[id], rst->regs_ctl + CGU_SYS_RST_CTRL);
+}
+
+static int hsdk_reset_do(struct hsdk_rst *rst)
+{
+	u32 reg;
+
+	reg = readl(rst->regs_rst + CGU_IP_SW_RESET);
+	reg &= ~CGU_IP_SW_RESET_DELAY_MASK;
+	reg |= CGU_IP_SW_RESET_DELAY << CGU_IP_SW_RESET_DELAY_SHIFT;
+	reg |= CGU_IP_SW_RESET_RESET;
+	writel(reg, rst->regs_rst + CGU_IP_SW_RESET);
+
+	/* wait till reset bit is back to 0 */
+	return readl_poll_timeout(rst->regs_rst + CGU_IP_SW_RESET, reg,
+		!(reg & CGU_IP_SW_RESET_RESET), SW_RESET_TIMEOUT);
+}
+
+static int hsdk_reset_reset(struct reset_ctl *rst_ctl)
+{
+	struct udevice *dev = rst_ctl->dev;
+	struct hsdk_rst *rst = dev_get_priv(dev);
+
+	if (rst_ctl->id >= HSDK_MAX_RESETS)
+		return -EINVAL;
+
+	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, rst_ctl,
+	      rst_ctl->dev, rst_ctl->id);
+
+	hsdk_reset_config(rst, rst_ctl->id);
+	return hsdk_reset_do(rst);
+}
+
+static int hsdk_reset_noop(struct reset_ctl *rst_ctl)
+{
+	return 0;
+}
+
+static const struct reset_ops hsdk_reset_ops = {
+	.request	= hsdk_reset_noop,
+	.free		= hsdk_reset_noop,
+	.rst_assert	= hsdk_reset_noop,
+	.rst_deassert	= hsdk_reset_reset,
+};
+
+static const struct udevice_id hsdk_reset_dt_match[] = {
+	{ .compatible = "snps,hsdk-reset" },
+	{ },
+};
+
+static int hsdk_reset_probe(struct udevice *dev)
+{
+	struct hsdk_rst *rst = dev_get_priv(dev);
+
+	rst->regs_ctl = dev_remap_addr_index(dev, 0);
+	if (!rst->regs_ctl)
+		return -EINVAL;
+
+	rst->regs_rst = dev_remap_addr_index(dev, 1);
+	if (!rst->regs_rst)
+		return -EINVAL;
+
+	return 0;
+}
+
+U_BOOT_DRIVER(hsdk_reset) = {
+	.name = "hsdk-reset",
+	.id = UCLASS_RESET,
+	.of_match = hsdk_reset_dt_match,
+	.ops = &hsdk_reset_ops,
+	.probe = hsdk_reset_probe,
+	.priv_auto_alloc_size = sizeof(struct hsdk_rst),
+};
diff --git a/include/dt-bindings/reset/snps,hsdk-reset.h b/include/dt-bindings/reset/snps,hsdk-reset.h
new file mode 100644
index 0000000000..e1a643e4bc
--- /dev/null
+++ b/include/dt-bindings/reset/snps,hsdk-reset.h
@@ -0,0 +1,17 @@
+/**
+ * This header provides index for the HSDK reset controller.
+ */
+#ifndef _DT_BINDINGS_RESET_CONTROLLER_SNPS_HSDK
+#define _DT_BINDINGS_RESET_CONTROLLER_SNPS_HSDK
+
+#define HSDK_APB_RESET	0
+#define HSDK_AXI_RESET	1
+#define HSDK_ETH_RESET	2
+#define HSDK_USB_RESET	3
+#define HSDK_SDIO_RESET	4
+#define HSDK_HDMI_RESET	5
+#define HSDK_GFX_RESET	6
+#define HSDK_DMAC_RESET	7
+#define HSDK_EBI_RESET	8
+
+#endif /*_DT_BINDINGS_RESET_CONTROLLER_SNPS_HSDK*/