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-rw-r--r--plat/mediatek/common/mtk_cirq.c551
1 files changed, 551 insertions, 0 deletions
diff --git a/plat/mediatek/common/mtk_cirq.c b/plat/mediatek/common/mtk_cirq.c
new file mode 100644
index 000000000..de3798684
--- /dev/null
+++ b/plat/mediatek/common/mtk_cirq.c
@@ -0,0 +1,551 @@
+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <drivers/arm/gic_common.h>
+#include <lib/mmio.h>
+
+#include <mt_gic_v3.h>
+#include <mtk_cirq.h>
+
+static struct cirq_events cirq_all_events = {
+ .spi_start = CIRQ_SPI_START,
+};
+static uint32_t already_cloned;
+/*
+ * mt_irq_mask_restore: restore all interrupts
+ * @mask: pointer to struct mtk_irq_mask for storing the original mask value.
+ * Return 0 for success; return negative values for failure.
+ * (This is ONLY used for the idle current measurement by the factory mode.)
+ */
+int mt_irq_mask_restore(struct mtk_irq_mask *mask)
+{
+ if (mask == NULL) {
+ return -1;
+ }
+ if (mask->header != IRQ_MASK_HEADER) {
+ return -1;
+ }
+ if (mask->footer != IRQ_MASK_FOOTER) {
+ return -1;
+ }
+
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x4),
+ mask->mask1);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x8),
+ mask->mask2);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0xc),
+ mask->mask3);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x10),
+ mask->mask4);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x14),
+ mask->mask5);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x18),
+ mask->mask6);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x1c),
+ mask->mask7);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x20),
+ mask->mask8);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x24),
+ mask->mask9);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x28),
+ mask->mask10);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x2c),
+ mask->mask11);
+ mmio_write_32((BASE_GICD_BASE + GICD_ISENABLER + 0x30),
+ mask->mask12);
+ /* make sure dist changes happen */
+ dsb();
+
+ return 0;
+}
+
+/*
+ * mt_irq_mask_all: disable all interrupts
+ * @mask: pointer to struct mtk_irq_mask for storing the original mask value.
+ * Return 0 for success; return negative values for failure.
+ * (This is ONLY used for the idle current measurement by the factory mode.)
+ */
+int mt_irq_mask_all(struct mtk_irq_mask *mask)
+{
+ if (mask != NULL) {
+ /* for SPI */
+ mask->mask1 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x4));
+ mask->mask2 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x8));
+ mask->mask3 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0xc));
+ mask->mask4 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x10));
+ mask->mask5 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x14));
+ mask->mask6 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x18));
+ mask->mask7 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x1c));
+ mask->mask8 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x20));
+ mask->mask9 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x24));
+ mask->mask10 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x28));
+ mask->mask11 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x2c));
+ mask->mask12 = mmio_read_32((BASE_GICD_BASE +
+ GICD_ISENABLER + 0x30));
+
+ /* for SPI */
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x4),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x8),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0xC),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x10),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x14),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x18),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x1C),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x20),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x24),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x28),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x2c),
+ 0xFFFFFFFF);
+ mmio_write_32((BASE_GICD_BASE + GICD_ICENABLER + 0x30),
+ 0xFFFFFFFF);
+ /* make sure distributor changes happen */
+ dsb();
+
+ mask->header = IRQ_MASK_HEADER;
+ mask->footer = IRQ_MASK_FOOTER;
+
+ return 0;
+ } else {
+ return -1;
+ }
+}
+
+static uint32_t mt_irq_get_pol(uint32_t irq)
+{
+#ifdef CIRQ_WITH_POLARITY
+ uint32_t reg;
+ uint32_t base = INT_POL_CTL0;
+
+ if (irq < 32U) {
+ return 0;
+ }
+
+ reg = ((irq - 32U) / 32U);
+
+ return mmio_read_32(base + reg * 4U);
+#else
+ return 0;
+#endif
+}
+
+unsigned int mt_irq_get_sens(unsigned int irq)
+{
+ unsigned int config;
+
+ /*
+ * 2'b10 edge
+ * 2'b01 level
+ */
+ config = mmio_read_32(MT_GIC_BASE + GICD_ICFGR + (irq / 16U) * 4U);
+ config = (config >> (irq % 16U) * 2U) & 0x3;
+
+ return config;
+}
+
+static void collect_all_wakeup_events(void)
+{
+ unsigned int i;
+ uint32_t gic_irq;
+ uint32_t cirq;
+ uint32_t cirq_reg;
+ uint32_t cirq_offset;
+ uint32_t mask;
+ uint32_t pol_mask;
+ uint32_t irq_offset;
+ uint32_t irq_mask;
+
+ if ((cirq_all_events.wakeup_events == NULL) ||
+ cirq_all_events.num_of_events == 0U) {
+ return;
+ }
+
+ for (i = 0U; i < cirq_all_events.num_of_events; i++) {
+ if (cirq_all_events.wakeup_events[i] > 0U) {
+ gic_irq = cirq_all_events.wakeup_events[i];
+ cirq = gic_irq - cirq_all_events.spi_start - 32U;
+ cirq_reg = cirq / 32U;
+ cirq_offset = cirq % 32U;
+ mask = 0x1 << cirq_offset;
+ irq_offset = gic_irq % 32U;
+ irq_mask = 0x1 << irq_offset;
+ /*
+ * CIRQ default masks all
+ */
+ cirq_all_events.table[cirq_reg].mask |= mask;
+ /*
+ * CIRQ default pol is low
+ */
+ pol_mask = mt_irq_get_pol(
+ cirq_all_events.wakeup_events[i])
+ & irq_mask;
+ /*
+ * 0 means rising
+ */
+ if (pol_mask == 0U) {
+ cirq_all_events.table[cirq_reg].pol |= mask;
+ }
+ /*
+ * CIRQ could monitor edge/level trigger
+ * cirq register (0: edge, 1: level)
+ */
+ if (mt_irq_get_sens(cirq_all_events.wakeup_events[i])
+ == SENS_EDGE) {
+ cirq_all_events.table[cirq_reg].sen |= mask;
+ }
+
+ cirq_all_events.table[cirq_reg].used = 1U;
+ cirq_all_events.table[cirq_reg].reg_num = cirq_reg;
+ }
+ }
+}
+
+/*
+ * mt_cirq_set_pol: Set the polarity for the specified SYS_CIRQ number.
+ * @cirq_num: the SYS_CIRQ number to set
+ * @pol: polarity to set
+ * @return:
+ * 0: set pol success
+ * -1: cirq num is out of range
+ */
+#ifdef CIRQ_WITH_POLARITY
+static int mt_cirq_set_pol(uint32_t cirq_num, uint32_t pol)
+{
+ uint32_t base;
+ uint32_t bit = 1U << (cirq_num % 32U);
+
+ if (cirq_num >= CIRQ_IRQ_NUM) {
+ return -1;
+ }
+
+ if (pol == MT_CIRQ_POL_NEG) {
+ base = (cirq_num / 32U) * 4U + CIRQ_POL_CLR_BASE;
+ } else if (pol == MT_CIRQ_POL_POS) {
+ base = (cirq_num / 32U) * 4U + CIRQ_POL_SET_BASE;
+ } else {
+ return -1;
+ }
+
+ mmio_write_32(base, bit);
+ return 0;
+}
+#endif
+
+/*
+ * mt_cirq_mask: Mask the specified SYS_CIRQ.
+ * @cirq_num: the SYS_CIRQ number to mask
+ * @return:
+ * 0: mask success
+ * -1: cirq num is out of range
+ */
+static int mt_cirq_mask(uint32_t cirq_num)
+{
+ uint32_t bit = 1U << (cirq_num % 32U);
+
+ if (cirq_num >= CIRQ_IRQ_NUM) {
+ return -1;
+ }
+
+ mmio_write_32((cirq_num / 32U) * 4U + CIRQ_MASK_SET_BASE, bit);
+
+ return 0;
+}
+
+/*
+ * mt_cirq_unmask: Unmask the specified SYS_CIRQ.
+ * @cirq_num: the SYS_CIRQ number to unmask
+ * @return:
+ * 0: umask success
+ * -1: cirq num is out of range
+ */
+static int mt_cirq_unmask(uint32_t cirq_num)
+{
+ uint32_t bit = 1U << (cirq_num % 32U);
+
+ if (cirq_num >= CIRQ_IRQ_NUM) {
+ return -1;
+ }
+
+ mmio_write_32((cirq_num / 32U) * 4U + CIRQ_MASK_CLR_BASE, bit);
+
+ return 0;
+}
+
+uint32_t mt_irq_get_en(uint32_t irq)
+{
+ uint32_t addr, st, val;
+
+ addr = BASE_GICD_BASE + GICD_ISENABLER + (irq / 32U) * 4U;
+ st = mmio_read_32(addr);
+
+ val = (st >> (irq % 32U)) & 1U;
+
+ return val;
+}
+
+static void __cirq_fast_clone(void)
+{
+ struct cirq_reg *reg;
+ unsigned int i;
+
+ for (i = 0U; i < CIRQ_REG_NUM ; ++i) {
+ uint32_t cirq_bit;
+
+ reg = &cirq_all_events.table[i];
+
+ if (reg->used == 0U) {
+ continue;
+ }
+
+ mmio_write_32(CIRQ_SENS_CLR_BASE + (reg->reg_num * 4U),
+ reg->sen);
+
+ for (cirq_bit = 0U; cirq_bit < 32U; ++cirq_bit) {
+ uint32_t val, cirq_id;
+ uint32_t gic_id;
+#ifdef CIRQ_WITH_POLARITY
+ uint32_t gic_bit, pol;
+#endif
+ uint32_t en;
+
+ val = ((1U << cirq_bit) & reg->mask);
+
+ if (val == 0U) {
+ continue;
+ }
+
+ cirq_id = (reg->reg_num << 5U) + cirq_bit;
+ gic_id = CIRQ_TO_IRQ_NUM(cirq_id);
+#ifdef CIRQ_WITH_POLARITY
+ gic_bit = (0x1U << ((gic_id - 32U) % 32U));
+ pol = mt_irq_get_pol(gic_id) & gic_bit;
+ if (pol != 0U) {
+ mt_cirq_set_pol(cirq_id, MT_CIRQ_POL_NEG);
+ } else {
+ mt_cirq_set_pol(cirq_id, MT_CIRQ_POL_POS);
+ }
+#endif
+ en = mt_irq_get_en(gic_id);
+ if (en == 1U) {
+ mt_cirq_unmask(cirq_id);
+ } else {
+ mt_cirq_mask(cirq_id);
+ }
+ }
+ }
+}
+
+static void cirq_fast_clone(void)
+{
+ if (already_cloned == 0U) {
+ collect_all_wakeup_events();
+ already_cloned = 1U;
+ }
+ __cirq_fast_clone();
+}
+
+void set_wakeup_sources(uint32_t *list, uint32_t num_of_events)
+{
+ cirq_all_events.num_of_events = num_of_events;
+ cirq_all_events.wakeup_events = list;
+}
+/*
+ * mt_cirq_clone_gic: Copy the setting from GIC to SYS_CIRQ
+ */
+void mt_cirq_clone_gic(void)
+{
+ cirq_fast_clone();
+}
+
+uint32_t mt_irq_get_pending_vec(uint32_t start_irq)
+{
+ uint32_t base = 0U;
+ uint32_t pending_vec = 0U;
+ uint32_t reg = start_irq / 32U;
+ uint32_t LSB_num, MSB_num;
+ uint32_t LSB_vec, MSB_vec;
+
+ base = BASE_GICD_BASE;
+
+ /* if start_irq is not aligned 32, do some assembling */
+ MSB_num = start_irq % 32U;
+ if (MSB_num != 0U) {
+ LSB_num = 32U - MSB_num;
+ LSB_vec = mmio_read_32(base + GICD_ISPENDR +
+ reg * 4U) >> MSB_num;
+ MSB_vec = mmio_read_32(base + GICD_ISPENDR +
+ (reg + 1U) * 4U) << LSB_num;
+ pending_vec = MSB_vec | LSB_vec;
+ } else {
+ pending_vec = mmio_read_32(base + GICD_ISPENDR + reg * 4);
+ }
+
+ return pending_vec;
+}
+
+static int mt_cirq_get_mask_vec(unsigned int i)
+{
+ return mmio_read_32((i * 4U) + CIRQ_MASK_BASE);
+}
+
+/*
+ * mt_cirq_ack_all: Ack all the interrupt on SYS_CIRQ
+ */
+void mt_cirq_ack_all(void)
+{
+ uint32_t ack_vec, pend_vec, mask_vec;
+ unsigned int i;
+
+ for (i = 0; i < CIRQ_CTRL_REG_NUM; i++) {
+ /*
+ * if a irq is pending & not masked, don't ack it
+ * , since cirq start irq might not be 32 aligned with gic,
+ * need an exotic API to get proper vector of pending irq
+ */
+ pend_vec = mt_irq_get_pending_vec(CIRQ_SPI_START
+ + (i + 1U) * 32U);
+ mask_vec = mt_cirq_get_mask_vec(i);
+ /* those should be acked are: "not (pending & not masked)",
+ */
+ ack_vec = (~pend_vec) | mask_vec;
+ mmio_write_32(CIRQ_ACK_BASE + (i * 4U), ack_vec);
+ }
+
+ /*
+ * make sure all cirq setting take effect
+ * before doing other things
+ */
+ dsb();
+}
+/*
+ * mt_cirq_enable: Enable SYS_CIRQ
+ */
+void mt_cirq_enable(void)
+{
+ uint32_t st;
+
+ /* level only */
+ mt_cirq_ack_all();
+
+ st = mmio_read_32(CIRQ_CON);
+ /*
+ * CIRQ could monitor edge/level trigger
+ */
+ st |= (CIRQ_CON_EN << CIRQ_CON_EN_BITS);
+
+ mmio_write_32(CIRQ_CON, (st & CIRQ_CON_BITS_MASK));
+}
+
+/*
+ * mt_cirq_disable: Disable SYS_CIRQ
+ */
+void mt_cirq_disable(void)
+{
+ uint32_t st;
+
+ st = mmio_read_32(CIRQ_CON);
+ st &= ~(CIRQ_CON_EN << CIRQ_CON_EN_BITS);
+ mmio_write_32(CIRQ_CON, (st & CIRQ_CON_BITS_MASK));
+}
+
+void mt_irq_unmask_for_sleep_ex(uint32_t irq)
+{
+ uint32_t mask;
+
+ mask = 1U << (irq % 32U);
+
+ mmio_write_32(BASE_GICD_BASE + GICD_ISENABLER +
+ ((irq / 32U) * 4U), mask);
+}
+
+void mt_cirq_mask_all(void)
+{
+ unsigned int i;
+
+ for (i = 0U; i < CIRQ_CTRL_REG_NUM; i++) {
+ mmio_write_32(CIRQ_MASK_SET_BASE + (i * 4U), 0xFFFFFFFF);
+ }
+ dsb();
+}
+
+static void cirq_fast_sw_flush(void)
+{
+ struct cirq_reg *reg;
+ unsigned int i;
+
+ for (i = 0U; i < CIRQ_REG_NUM ; ++i) {
+ uint32_t cirq_bit;
+
+ reg = &cirq_all_events.table[i];
+
+ if (reg->used == 0U) {
+ continue;
+ }
+
+ reg->pending = mmio_read_32(CIRQ_STA_BASE +
+ (reg->reg_num << 2U));
+ reg->pending &= reg->mask;
+
+ for (cirq_bit = 0U; cirq_bit < 32U; ++cirq_bit) {
+ uint32_t val, cirq_id;
+
+ val = (1U << cirq_bit) & reg->pending;
+ if (val == 0U) {
+ continue;
+ }
+
+ cirq_id = (reg->reg_num << 5U) + cirq_bit;
+ mt_irq_set_pending(CIRQ_TO_IRQ_NUM(cirq_id));
+ if (CIRQ_TO_IRQ_NUM(cirq_id) == MD_WDT_IRQ_BIT_ID) {
+ INFO("Set MD_WDT_IRQ pending in %s\n",
+ __func__);
+ }
+ }
+ }
+}
+
+/*
+ * mt_cirq_disable: Flush interrupt from SYS_CIRQ to GIC
+ */
+void mt_cirq_flush(void)
+{
+ cirq_fast_sw_flush();
+ mt_cirq_mask_all();
+ mt_cirq_ack_all();
+}
+
+void mt_cirq_sw_reset(void)
+{
+#ifdef CIRQ_NEED_SW_RESET
+ uint32_t st;
+
+ st = mmio_read_32(CIRQ_CON);
+ st |= (CIRQ_SW_RESET << CIRQ_CON_SW_RST_BITS);
+ mmio_write_32(CIRQ_CON, st);
+#endif
+}
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