--- /dev/null
+/*
+ * Copyright (C) 2013 Altera Corporation <www.altera.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/freeze_controller.h>
+#include <asm/arch/timer.h>
+#include <asm/errno.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct socfpga_freeze_controller *freeze_controller_base =
+ (void *)(SOCFPGA_SYSMGR_ADDRESS + SYSMGR_FRZCTRL_ADDRESS);
+
+/*
+ * Default state from cold reset is FREEZE_ALL; the global
+ * flag is set to TRUE to indicate the IO banks are frozen
+ */
+static uint32_t frzctrl_channel_freeze[FREEZE_CHANNEL_NUM]
+ = { FREEZE_CTRL_FROZEN, FREEZE_CTRL_FROZEN,
+ FREEZE_CTRL_FROZEN, FREEZE_CTRL_FROZEN};
+
+/* Freeze HPS IOs */
+void sys_mgr_frzctrl_freeze_req(void)
+{
+ u32 ioctrl_reg_offset;
+ u32 reg_value;
+ u32 reg_cfg_mask;
+ u32 channel_id;
+
+ /* select software FSM */
+ writel(SYSMGR_FRZCTRL_SRC_VIO1_ENUM_SW, &freeze_controller_base->src);
+
+ /* Freeze channel 0 to 2 */
+ for (channel_id = 0; channel_id <= 2; channel_id++) {
+ ioctrl_reg_offset = (u32)(
+ &freeze_controller_base->vioctrl +
+ (channel_id << SYSMGR_FRZCTRL_VIOCTRL_SHIFT));
+
+ /*
+ * Assert active low enrnsl, plniotri
+ * and niotri signals
+ */
+ reg_cfg_mask =
+ SYSMGR_FRZCTRL_VIOCTRL_SLEW_MASK
+ | SYSMGR_FRZCTRL_VIOCTRL_WKPULLUP_MASK
+ | SYSMGR_FRZCTRL_VIOCTRL_TRISTATE_MASK;
+ clrbits_le32(ioctrl_reg_offset, reg_cfg_mask);
+
+ /*
+ * Note: Delay for 20ns at min
+ * Assert active low bhniotri signal and de-assert
+ * active high csrdone
+ */
+ reg_cfg_mask
+ = SYSMGR_FRZCTRL_VIOCTRL_BUSHOLD_MASK
+ | SYSMGR_FRZCTRL_VIOCTRL_CFG_MASK;
+ clrbits_le32(ioctrl_reg_offset, reg_cfg_mask);
+
+ /* Set global flag to indicate channel is frozen */
+ frzctrl_channel_freeze[channel_id] = FREEZE_CTRL_FROZEN;
+ }
+
+ /* Freeze channel 3 */
+ /*
+ * Assert active low enrnsl, plniotri and
+ * niotri signals
+ */
+ reg_cfg_mask
+ = SYSMGR_FRZCTRL_HIOCTRL_SLEW_MASK
+ | SYSMGR_FRZCTRL_HIOCTRL_WKPULLUP_MASK
+ | SYSMGR_FRZCTRL_HIOCTRL_TRISTATE_MASK;
+ clrbits_le32(&freeze_controller_base->hioctrl, reg_cfg_mask);
+
+ /*
+ * assert active low bhniotri & nfrzdrv signals,
+ * de-assert active high csrdone and assert
+ * active high frzreg and nfrzdrv signals
+ */
+ reg_value = readl(&freeze_controller_base->hioctrl);
+ reg_cfg_mask
+ = SYSMGR_FRZCTRL_HIOCTRL_BUSHOLD_MASK
+ | SYSMGR_FRZCTRL_HIOCTRL_CFG_MASK;
+ reg_value
+ = (reg_value & ~reg_cfg_mask)
+ | SYSMGR_FRZCTRL_HIOCTRL_REGRST_MASK
+ | SYSMGR_FRZCTRL_HIOCTRL_OCTRST_MASK;
+ writel(reg_value, &freeze_controller_base->hioctrl);
+
+ /*
+ * assert active high reinit signal and de-assert
+ * active high pllbiasen signals
+ */
+ reg_value = readl(&freeze_controller_base->hioctrl);
+ reg_value
+ = (reg_value &
+ ~SYSMGR_FRZCTRL_HIOCTRL_OCT_CFGEN_CALSTART_MASK)
+ | SYSMGR_FRZCTRL_HIOCTRL_DLLRST_MASK;
+ writel(reg_value, &freeze_controller_base->hioctrl);
+
+ /* Set global flag to indicate channel is frozen */
+ frzctrl_channel_freeze[channel_id] = FREEZE_CTRL_FROZEN;
+}
+
+/* Unfreeze/Thaw HPS IOs */
+void sys_mgr_frzctrl_thaw_req(void)
+{
+ u32 ioctrl_reg_offset;
+ u32 reg_cfg_mask;
+ u32 reg_value;
+ u32 channel_id;
+
+ /* select software FSM */
+ writel(SYSMGR_FRZCTRL_SRC_VIO1_ENUM_SW, &freeze_controller_base->src);
+
+ /* Thaw channel 0 to 2 */
+ for (channel_id = 0; channel_id <= 2; channel_id++) {
+ ioctrl_reg_offset
+ = (u32)(&freeze_controller_base->vioctrl
+ + (channel_id << SYSMGR_FRZCTRL_VIOCTRL_SHIFT));
+
+ /*
+ * Assert active low bhniotri signal and
+ * de-assert active high csrdone
+ */
+ reg_cfg_mask
+ = SYSMGR_FRZCTRL_VIOCTRL_BUSHOLD_MASK
+ | SYSMGR_FRZCTRL_VIOCTRL_CFG_MASK;
+ setbits_le32(ioctrl_reg_offset, reg_cfg_mask);
+
+ /*
+ * Note: Delay for 20ns at min
+ * de-assert active low plniotri and niotri signals
+ */
+ reg_cfg_mask
+ = SYSMGR_FRZCTRL_VIOCTRL_WKPULLUP_MASK
+ | SYSMGR_FRZCTRL_VIOCTRL_TRISTATE_MASK;
+ setbits_le32(ioctrl_reg_offset, reg_cfg_mask);
+
+ /*
+ * Note: Delay for 20ns at min
+ * de-assert active low enrnsl signal
+ */
+ setbits_le32(ioctrl_reg_offset,
+ SYSMGR_FRZCTRL_VIOCTRL_SLEW_MASK);
+
+ /* Set global flag to indicate channel is thawed */
+ frzctrl_channel_freeze[channel_id] = FREEZE_CTRL_THAWED;
+ }
+
+ /* Thaw channel 3 */
+ /* de-assert active high reinit signal */
+ clrbits_le32(&freeze_controller_base->hioctrl,
+ SYSMGR_FRZCTRL_HIOCTRL_DLLRST_MASK);
+
+ /*
+ * Note: Delay for 40ns at min
+ * assert active high pllbiasen signals
+ */
+ setbits_le32(&freeze_controller_base->hioctrl,
+ SYSMGR_FRZCTRL_HIOCTRL_OCT_CFGEN_CALSTART_MASK);
+
+ /*
+ * Delay 1000 intosc. intosc is based on eosc1
+ * Use worst case which is fatest eosc1=50MHz, delay required
+ * is 1/50MHz * 1000 = 20us
+ */
+ udelay(20);
+
+ /*
+ * de-assert active low bhniotri signals,
+ * assert active high csrdone and nfrzdrv signal
+ */
+ reg_value = readl(&freeze_controller_base->hioctrl);
+ reg_value = (reg_value
+ | SYSMGR_FRZCTRL_HIOCTRL_BUSHOLD_MASK
+ | SYSMGR_FRZCTRL_HIOCTRL_CFG_MASK)
+ & ~SYSMGR_FRZCTRL_HIOCTRL_OCTRST_MASK;
+ writel(reg_value, &freeze_controller_base->hioctrl);
+
+ /*
+ * Delay 33 intosc
+ * Use worst case which is fatest eosc1=50MHz, delay required
+ * is 1/50MHz * 33 = 660ns ~= 1us
+ */
+ udelay(1);
+
+ /* de-assert active low plniotri and niotri signals */
+ reg_cfg_mask
+ = SYSMGR_FRZCTRL_HIOCTRL_WKPULLUP_MASK
+ | SYSMGR_FRZCTRL_HIOCTRL_TRISTATE_MASK;
+
+ setbits_le32(&freeze_controller_base->hioctrl, reg_cfg_mask);
+
+ /*
+ * Note: Delay for 40ns at min
+ * de-assert active high frzreg signal
+ */
+ clrbits_le32(&freeze_controller_base->hioctrl,
+ SYSMGR_FRZCTRL_HIOCTRL_REGRST_MASK);
+
+ /*
+ * Note: Delay for 40ns at min
+ * de-assert active low enrnsl signal
+ */
+ setbits_le32(&freeze_controller_base->hioctrl,
+ SYSMGR_FRZCTRL_HIOCTRL_SLEW_MASK);
+
+ /* Set global flag to indicate channel is thawed */
+ frzctrl_channel_freeze[channel_id] = FREEZE_CTRL_THAWED;
+}
Code Review / kvmfornfv.git / blobdiff