arm: socfpga: stratix10: Add reset manager driver for Stratix10 SoC

Add Reset Manager driver support for Stratix SoC

Signed-off-by: Chin Liang See <chin.liang.see@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>

arch/arm/mach-socfpga/Makefile

@@ -30,6 +30,7 @@ endif
 
 ifdef CONFIG_TARGET_SOCFPGA_STRATIX10
 obj-y	+= clock_manager_s10.o
+obj-y	+= reset_manager_s10.o
 obj-y	+= wrap_pll_config_s10.o
 endif
 ifdef CONFIG_SPL_BUILD

arch/arm/mach-socfpga/include/mach/reset_manager.h

@@ -42,6 +42,8 @@ int socfpga_eth_reset_common(void (*resetfn)(const u8 of_reset_id,
 #include <asm/arch/reset_manager_gen5.h>
 #elif defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
 #include <asm/arch/reset_manager_arria10.h>
+#elif defined(CONFIG_TARGET_SOCFPGA_STRATIX10)
+#include <asm/arch/reset_manager_s10.h>
 #endif
 
 #endif /* _RESET_MANAGER_H_ */

arch/arm/mach-socfpga/include/mach/reset_manager_s10.h

@@ -0,0 +1,116 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2016-2018 Intel Corporation <www.intel.com>
+ *
+ */
+
+#ifndef	_RESET_MANAGER_S10_
+#define	_RESET_MANAGER_S10_
+
+void reset_cpu(ulong addr);
+void reset_deassert_peripherals_handoff(void);
+
+void socfpga_bridges_reset(int enable);
+
+void socfpga_per_reset(u32 reset, int set);
+void socfpga_per_reset_all(void);
+
+struct socfpga_reset_manager {
+	u32	status;
+	u32	mpu_rst_stat;
+	u32	misc_stat;
+	u32	padding1;
+	u32	hdsk_en;
+	u32	hdsk_req;
+	u32	hdsk_ack;
+	u32	hdsk_stall;
+	u32	mpumodrst;
+	u32	per0modrst;
+	u32	per1modrst;
+	u32	brgmodrst;
+	u32	padding2;
+	u32     cold_mod_reset;
+	u32	padding3;
+	u32     dbg_mod_reset;
+	u32     tap_mod_reset;
+	u32	padding4;
+	u32	padding5;
+	u32     brg_warm_mask;
+	u32	padding6[3];
+	u32     tst_stat;
+	u32	padding7;
+	u32     hdsk_timeout;
+	u32     mpul2flushtimeout;
+	u32     dbghdsktimeout;
+};
+
+#define RSTMGR_MPUMODRST_CORE0		0
+#define RSTMGR_PER0MODRST_OCP_MASK	0x0020bf00
+#define RSTMGR_BRGMODRST_DDRSCH_MASK	0X00000040
+
+/*
+ * Define a reset identifier, from which a permodrst bank ID
+ * and reset ID can be extracted using the subsequent macros
+ * RSTMGR_RESET() and RSTMGR_BANK().
+ */
+#define RSTMGR_BANK_OFFSET	8
+#define RSTMGR_BANK_MASK	0x7
+#define RSTMGR_RESET_OFFSET	0
+#define RSTMGR_RESET_MASK	0x1f
+#define RSTMGR_DEFINE(_bank, _offset)		\
+	((_bank) << RSTMGR_BANK_OFFSET) | ((_offset) << RSTMGR_RESET_OFFSET)
+
+/* Extract reset ID from the reset identifier. */
+#define RSTMGR_RESET(_reset)			\
+	(((_reset) >> RSTMGR_RESET_OFFSET) & RSTMGR_RESET_MASK)
+
+/* Extract bank ID from the reset identifier. */
+#define RSTMGR_BANK(_reset)			\
+	(((_reset) >> RSTMGR_BANK_OFFSET) & RSTMGR_BANK_MASK)
+
+/*
+ * SocFPGA Stratix10 reset IDs, bank mapping is as follows:
+ * 0 ... mpumodrst
+ * 1 ... per0modrst
+ * 2 ... per1modrst
+ * 3 ... brgmodrst
+ */
+#define RSTMGR_EMAC0		RSTMGR_DEFINE(1, 0)
+#define RSTMGR_EMAC1		RSTMGR_DEFINE(1, 1)
+#define RSTMGR_EMAC2		RSTMGR_DEFINE(1, 2)
+#define RSTMGR_USB0		RSTMGR_DEFINE(1, 3)
+#define RSTMGR_USB1		RSTMGR_DEFINE(1, 4)
+#define RSTMGR_NAND		RSTMGR_DEFINE(1, 5)
+#define RSTMGR_SDMMC		RSTMGR_DEFINE(1, 7)
+#define RSTMGR_EMAC0_OCP	RSTMGR_DEFINE(1, 8)
+#define RSTMGR_EMAC1_OCP	RSTMGR_DEFINE(1, 9)
+#define RSTMGR_EMAC2_OCP	RSTMGR_DEFINE(1, 10)
+#define RSTMGR_USB0_OCP		RSTMGR_DEFINE(1, 11)
+#define RSTMGR_USB1_OCP		RSTMGR_DEFINE(1, 12)
+#define RSTMGR_NAND_OCP		RSTMGR_DEFINE(1, 13)
+#define RSTMGR_SDMMC_OCP	RSTMGR_DEFINE(1, 15)
+#define RSTMGR_DMA		RSTMGR_DEFINE(1, 16)
+#define RSTMGR_SPIM0		RSTMGR_DEFINE(1, 17)
+#define RSTMGR_SPIM1		RSTMGR_DEFINE(1, 18)
+#define RSTMGR_L4WD0		RSTMGR_DEFINE(2, 0)
+#define RSTMGR_L4WD1		RSTMGR_DEFINE(2, 1)
+#define RSTMGR_L4WD2		RSTMGR_DEFINE(2, 2)
+#define RSTMGR_L4WD3		RSTMGR_DEFINE(2, 3)
+#define RSTMGR_OSC1TIMER0	RSTMGR_DEFINE(2, 4)
+#define RSTMGR_I2C0		RSTMGR_DEFINE(2, 8)
+#define RSTMGR_I2C1		RSTMGR_DEFINE(2, 9)
+#define RSTMGR_I2C2		RSTMGR_DEFINE(2, 10)
+#define RSTMGR_I2C3		RSTMGR_DEFINE(2, 11)
+#define RSTMGR_I2C4		RSTMGR_DEFINE(2, 12)
+#define RSTMGR_UART0		RSTMGR_DEFINE(2, 16)
+#define RSTMGR_UART1		RSTMGR_DEFINE(2, 17)
+#define RSTMGR_GPIO0		RSTMGR_DEFINE(2, 24)
+#define RSTMGR_GPIO1		RSTMGR_DEFINE(2, 25)
+#define RSTMGR_SDR		RSTMGR_DEFINE(3, 6)
+
+void socfpga_emac_manage_reset(const unsigned int of_reset_id, u32 state);
+
+/* Create a human-readable reference to SoCFPGA reset. */
+#define SOCFPGA_RESET(_name)	RSTMGR_##_name
+
+#endif /* _RESET_MANAGER_S10_ */

arch/arm/mach-socfpga/reset_manager.c

@@ -8,8 +8,16 @@
 #include <asm/io.h>
 #include <asm/arch/reset_manager.h>
 
+#if defined(CONFIG_TARGET_SOCFPGA_STRATIX10)
+#include <asm/arch/mailbox_s10.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if !defined(CONFIG_TARGET_SOCFPGA_STRATIX10)
 static const struct socfpga_reset_manager *reset_manager_base =
 		(void *)SOCFPGA_RSTMGR_ADDRESS;
+#endif
 
 /*
  * Write the reset manager register to cause reset
@@ -17,8 +25,13 @@ static const struct socfpga_reset_manager *reset_manager_base =
 void reset_cpu(ulong addr)
 {
 	/* request a warm reset */
+#if defined(CONFIG_TARGET_SOCFPGA_STRATIX10)
+	puts("Mailbox: Issuing mailbox cmd REBOOT_HPS\n");
+	mbox_reset_cold();
+#else
 	writel(1 << RSTMGR_CTRL_SWWARMRSTREQ_LSB,
 	       &reset_manager_base->ctrl);
+#endif
 	/*
 	 * infinite loop here as watchdog will trigger and reset
 	 * the processor

arch/arm/mach-socfpga/reset_manager_s10.c

@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2016-2018 Intel Corporation <www.intel.com>
+ *
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/reset_manager.h>
+#include <asm/arch/system_manager.h>
+#include <dt-bindings/reset/altr,rst-mgr-s10.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct socfpga_reset_manager *reset_manager_base =
+		(void *)SOCFPGA_RSTMGR_ADDRESS;
+static const struct socfpga_system_manager *system_manager_base =
+		(void *)SOCFPGA_SYSMGR_ADDRESS;
+
+/* Assert or de-assert SoCFPGA reset manager reset. */
+void socfpga_per_reset(u32 reset, int set)
+{
+	const void *reg;
+
+	if (RSTMGR_BANK(reset) == 0)
+		reg = &reset_manager_base->mpumodrst;
+	else if (RSTMGR_BANK(reset) == 1)
+		reg = &reset_manager_base->per0modrst;
+	else if (RSTMGR_BANK(reset) == 2)
+		reg = &reset_manager_base->per1modrst;
+	else if (RSTMGR_BANK(reset) == 3)
+		reg = &reset_manager_base->brgmodrst;
+	else	/* Invalid reset register, do nothing */
+		return;
+
+	if (set)
+		setbits_le32(reg, 1 << RSTMGR_RESET(reset));
+	else
+		clrbits_le32(reg, 1 << RSTMGR_RESET(reset));
+}
+
+/*
+ * Assert reset on every peripheral but L4WD0.
+ * Watchdog must be kept intact to prevent glitches
+ * and/or hangs.
+ */
+void socfpga_per_reset_all(void)
+{
+	const u32 l4wd0 = 1 << RSTMGR_RESET(SOCFPGA_RESET(L4WD0));
+
+	/* disable all except OCP and l4wd0. OCP disable later */
+	writel(~(l4wd0 | RSTMGR_PER0MODRST_OCP_MASK),
+	       &reset_manager_base->per0modrst);
+	writel(~l4wd0, &reset_manager_base->per0modrst);
+	writel(0xffffffff, &reset_manager_base->per1modrst);
+}
+
+void socfpga_bridges_reset(int enable)
+{
+	if (enable) {
+		/* clear idle request to all bridges */
+		setbits_le32(&system_manager_base->noc_idlereq_clr, ~0);
+
+		/* Release bridges from reset state per handoff value */
+		clrbits_le32(&reset_manager_base->brgmodrst, ~0);
+
+		/* Poll until all idleack to 0 */
+		while (readl(&system_manager_base->noc_idleack))
+			;
+	} else {
+		/* set idle request to all bridges */
+		writel(~0, &system_manager_base->noc_idlereq_set);
+
+		/* Enable the NOC timeout */
+		writel(1, &system_manager_base->noc_timeout);
+
+		/* Poll until all idleack to 1 */
+		while ((readl(&system_manager_base->noc_idleack) ^
+			(SYSMGR_NOC_H2F_MSK | SYSMGR_NOC_LWH2F_MSK)))
+			;
+
+		/* Poll until all idlestatus to 1 */
+		while ((readl(&system_manager_base->noc_idlestatus) ^
+			(SYSMGR_NOC_H2F_MSK | SYSMGR_NOC_LWH2F_MSK)))
+			;
+
+		/* Put all bridges (except NOR DDR scheduler) into reset */
+		setbits_le32(&reset_manager_base->brgmodrst,
+			     ~RSTMGR_BRGMODRST_DDRSCH_MASK);
+
+		/* Disable NOC timeout */
+		writel(0, &system_manager_base->noc_timeout);
+	}
+}
+
+/* of_reset_id: emac reset id
+ * state: 0 - disable reset, !0 - enable reset
+ */
+void socfpga_emac_manage_reset(const unsigned int of_reset_id, u32 state)
+{
+	u32 reset_emac;
+	u32 reset_emacocp;
+
+	/* hardcode this now */
+	switch (of_reset_id) {
+	case EMAC0_RESET:
+		reset_emac = SOCFPGA_RESET(EMAC0);
+		reset_emacocp = SOCFPGA_RESET(EMAC0_OCP);
+		break;
+	case EMAC1_RESET:
+		reset_emac = SOCFPGA_RESET(EMAC1);
+		reset_emacocp = SOCFPGA_RESET(EMAC1_OCP);
+		break;
+	case EMAC2_RESET:
+		reset_emac = SOCFPGA_RESET(EMAC2);
+		reset_emacocp = SOCFPGA_RESET(EMAC2_OCP);
+		break;
+	default:
+		printf("GMAC: Invalid reset ID (%i)!\n", of_reset_id);
+		hang();
+		break;
+	}
+
+	/* Reset ECC OCP first */
+	socfpga_per_reset(reset_emacocp, state);
+
+	/* Release the EMAC controller from reset */
+	socfpga_per_reset(reset_emac, state);
+}
+
+/*
+ * Release peripherals from reset based on handoff
+ */
+void reset_deassert_peripherals_handoff(void)
+{
+	writel(0, &reset_manager_base->per1modrst);
+	/* Enable OCP first */
+	writel(~RSTMGR_PER0MODRST_OCP_MASK, &reset_manager_base->per0modrst);
+	writel(0, &reset_manager_base->per0modrst);
+}