Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 505 insertions, 0 deletions

diff --git a/drivers/allwinner/axp/axp803.c b/drivers/allwinner/axp/axp803.c
new file mode 100644
index 0000000..19a9549
--- /dev/null
+++ b/drivers/allwinner/axp/axp803.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <drivers/allwinner/axp.h>
+
+const uint8_t axp_chip_id = AXP803_CHIP_ID;
+const char *const axp_compatible = "x-powers,axp803";
+
+#if SUNXI_SETUP_REGULATORS == 1
+const struct axp_regulator axp_regulators[] = {
+	{"aldo1",  700, 3300, 100, NA, 0x28, 0x13, 5},
+	{"dcdc1", 1600, 3400, 100, NA, 0x20, 0x10, 0},
+	{"dcdc5",  800, 1840,  10, 32, 0x24, 0x10, 4},
+	{"dcdc6",  600, 1520,  10, 50, 0x25, 0x10, 5},
+	{"dldo1",  700, 3300, 100, NA, 0x15, 0x12, 3},
+	{"dldo2",  700, 4200, 100, 27, 0x16, 0x12, 4},
+	{"dldo3",  700, 3300, 100, NA, 0x17, 0x12, 5},
+	{"dldo4",  700, 3300, 100, NA, 0x18, 0x12, 6},
+	{"fldo1",  700, 1450,  50, NA, 0x1c, 0x13, 2},
+	{}
+};
+#endif
diff --git a/drivers/allwinner/axp/axp805.c b/drivers/allwinner/axp/axp805.c
new file mode 100644
index 0000000..3a03fec
--- /dev/null
+++ b/drivers/allwinner/axp/axp805.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <drivers/allwinner/axp.h>
+
+const uint8_t axp_chip_id = AXP805_CHIP_ID;
+const char *const axp_compatible = "x-powers,axp805";
+
+#if SUNXI_SETUP_REGULATORS == 1
+/*
+ * The "dcdcd" split changes the step size by a factor of 5, not 2;
+ * disallow values above the split to maintain accuracy.
+ */
+const struct axp_regulator axp_regulators[] = {
+	{"dcdca",  600, 1520,  10, 50, 0x12, 0x10, 0},
+	{"dcdcb", 1000, 2550,  50, NA, 0x13, 0x10, 1},
+	{"dcdcc",  600, 1520,  10, 50, 0x14, 0x10, 2},
+	{"dcdcd",  600, 1500,  20, NA, 0x15, 0x10, 3},
+	{"dcdce", 1100, 3400, 100, NA, 0x16, 0x10, 4},
+	{"aldo1",  700, 3300, 100, NA, 0x17, 0x10, 5},
+	{"aldo2",  700, 3300, 100, NA, 0x18, 0x10, 6},
+	{"aldo3",  700, 3300, 100, NA, 0x19, 0x10, 7},
+	{"bldo1",  700, 1900, 100, NA, 0x20, 0x11, 0},
+	{"bldo2",  700, 1900, 100, NA, 0x21, 0x11, 1},
+	{"bldo3",  700, 1900, 100, NA, 0x22, 0x11, 2},
+	{"bldo4",  700, 1900, 100, NA, 0x23, 0x11, 3},
+	{"cldo1",  700, 3300, 100, NA, 0x24, 0x11, 4},
+	{"cldo2",  700, 4200, 100, 27, 0x25, 0x11, 5},
+	{"cldo3",  700, 3300, 100, NA, 0x26, 0x11, 6},
+	{}
+};
+#endif
diff --git a/drivers/allwinner/axp/common.c b/drivers/allwinner/axp/common.c
new file mode 100644
index 0000000..f1250b0
--- /dev/null
+++ b/drivers/allwinner/axp/common.c
@@ -0,0 +1,212 @@
+/*
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <errno.h>
+
+#include <libfdt.h>
+
+#include <common/debug.h>
+#include <drivers/allwinner/axp.h>
+
+int axp_check_id(void)
+{
+	int ret;
+
+	ret = axp_read(0x03);
+	if (ret < 0)
+		return ret;
+
+	ret &= 0xcf;
+	if (ret != axp_chip_id) {
+		ERROR("PMIC: Found unknown PMIC %02x\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int axp_clrsetbits(uint8_t reg, uint8_t clr_mask, uint8_t set_mask)
+{
+	uint8_t val;
+	int ret;
+
+	ret = axp_read(reg);
+	if (ret < 0)
+		return ret;
+
+	val = (ret & ~clr_mask) | set_mask;
+
+	return axp_write(reg, val);
+}
+
+void axp_power_off(void)
+{
+	/* Set "power disable control" bit */
+	axp_setbits(0x32, BIT(7));
+}
+
+#if SUNXI_SETUP_REGULATORS == 1
+/*
+ * Retrieve the voltage from a given regulator DTB node.
+ * Both the regulator-{min,max}-microvolt properties must be present and
+ * have the same value. Return that value in millivolts.
+ */
+static int fdt_get_regulator_millivolt(const void *fdt, int node)
+{
+	const fdt32_t *prop;
+	uint32_t min_volt;
+
+	prop = fdt_getprop(fdt, node, "regulator-min-microvolt", NULL);
+	if (prop == NULL)
+		return -EINVAL;
+	min_volt = fdt32_to_cpu(*prop);
+
+	prop = fdt_getprop(fdt, node, "regulator-max-microvolt", NULL);
+	if (prop == NULL)
+		return -EINVAL;
+
+	if (fdt32_to_cpu(*prop) != min_volt)
+		return -EINVAL;
+
+	return min_volt / 1000;
+}
+
+static int setup_regulator(const void *fdt, int node,
+			   const struct axp_regulator *reg)
+{
+	uint8_t val;
+	int mvolt;
+
+	mvolt = fdt_get_regulator_millivolt(fdt, node);
+	if (mvolt < reg->min_volt || mvolt > reg->max_volt)
+		return -EINVAL;
+
+	val = (mvolt / reg->step) - (reg->min_volt / reg->step);
+	if (val > reg->split)
+		val = ((val - reg->split) / 2) + reg->split;
+
+	axp_write(reg->volt_reg, val);
+	axp_setbits(reg->switch_reg, BIT(reg->switch_bit));
+
+	INFO("PMIC: %s voltage: %d.%03dV\n", reg->dt_name,
+	     mvolt / 1000, mvolt % 1000);
+
+	return 0;
+}
+
+static bool is_node_disabled(const void *fdt, int node)
+{
+	const char *cell;
+	cell = fdt_getprop(fdt, node, "status", NULL);
+	if (cell == NULL) {
+		return false;
+	}
+	return strcmp(cell, "okay") != 0;
+}
+
+static bool should_enable_regulator(const void *fdt, int node)
+{
+	if (is_node_disabled(fdt, node)) {
+		return false;
+	}
+	if (fdt_getprop(fdt, node, "phandle", NULL) != NULL) {
+		return true;
+	}
+	if (fdt_getprop(fdt, node, "regulator-always-on", NULL) != NULL) {
+		return true;
+	}
+	return false;
+}
+
+static bool board_uses_usb0_host_mode(const void *fdt)
+{
+	int node, length;
+	const char *prop;
+
+	node = fdt_node_offset_by_compatible(fdt, -1,
+					     "allwinner,sun8i-a33-musb");
+	if (node < 0) {
+		return false;
+	}
+
+	prop = fdt_getprop(fdt, node, "dr_mode", &length);
+	if (!prop) {
+		return false;
+	}
+
+	return !strncmp(prop, "host", length);
+}
+
+void axp_setup_regulators(const void *fdt)
+{
+	int node;
+	bool sw = false;
+
+	if (fdt == NULL)
+		return;
+
+	/* locate the PMIC DT node, bail out if not found */
+	node = fdt_node_offset_by_compatible(fdt, -1, axp_compatible);
+	if (node < 0) {
+		WARN("PMIC: No PMIC DT node, skipping setup\n");
+		return;
+	}
+
+	/* This applies to AXP803 only. */
+	if (fdt_getprop(fdt, node, "x-powers,drive-vbus-en", NULL) &&
+	    board_uses_usb0_host_mode(fdt)) {
+		axp_clrbits(0x8f, BIT(4));
+		axp_setbits(0x30, BIT(2));
+		INFO("PMIC: Enabling DRIVEVBUS\n");
+	}
+
+	/* descend into the "regulators" subnode */
+	node = fdt_subnode_offset(fdt, node, "regulators");
+	if (node < 0) {
+		WARN("PMIC: No regulators DT node, skipping setup\n");
+		return;
+	}
+
+	/* iterate over all regulators to find used ones */
+	fdt_for_each_subnode(node, fdt, node) {
+		const struct axp_regulator *reg;
+		const char *name;
+		int length;
+
+		/* We only care if it's always on or referenced. */
+		if (!should_enable_regulator(fdt, node))
+			continue;
+
+		name = fdt_get_name(fdt, node, &length);
+
+		/* Enable the switch last to avoid overheating. */
+		if (!strncmp(name, "dc1sw", length) ||
+		    !strncmp(name, "sw", length)) {
+			sw = true;
+			continue;
+		}
+
+		for (reg = axp_regulators; reg->dt_name; reg++) {
+			if (!strncmp(name, reg->dt_name, length)) {
+				setup_regulator(fdt, node, reg);
+				break;
+			}
+		}
+	}
+
+	/*
+	 * On the AXP803, if DLDO2 is enabled after DC1SW, the PMIC overheats
+	 * and shuts down. So always enable DC1SW as the very last regulator.
+	 */
+	if (sw) {
+		INFO("PMIC: Enabling DC SW\n");
+		if (axp_chip_id == AXP803_CHIP_ID)
+			axp_setbits(0x12, BIT(7));
+		if (axp_chip_id == AXP805_CHIP_ID)
+			axp_setbits(0x11, BIT(7));
+	}
+}
+#endif	/* SUNXI_SETUP_REGULATORS */
diff --git a/drivers/allwinner/sunxi_msgbox.c b/drivers/allwinner/sunxi_msgbox.c
new file mode 100644
index 0000000..cc4a6ff
--- /dev/null
+++ b/drivers/allwinner/sunxi_msgbox.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <stdbool.h>
+
+#include <drivers/delay_timer.h>
+#include <lib/bakery_lock.h>
+#include <lib/mmio.h>
+#include <lib/utils_def.h>
+
+#include <sunxi_mmap.h>
+
+#define REMOTE_IRQ_EN_REG	0x0040
+#define REMOTE_IRQ_STAT_REG	0x0050
+#define LOCAL_IRQ_EN_REG	0x0060
+#define LOCAL_IRQ_STAT_REG	0x0070
+
+#define RX_IRQ(n)		BIT(0 + 2 * (n))
+#define TX_IRQ(n)		BIT(1 + 2 * (n))
+
+#define FIFO_STAT_REG(n)	(0x0100 + 0x4 * (n))
+#define FIFO_STAT_MASK		GENMASK(0, 0)
+
+#define MSG_STAT_REG(n)		(0x0140 + 0x4 * (n))
+#define MSG_STAT_MASK		GENMASK(2, 0)
+
+#define MSG_DATA_REG(n)		(0x0180 + 0x4 * (n))
+
+#define RX_CHAN			1
+#define TX_CHAN			0
+
+#define MHU_MAX_SLOT_ID		31
+
+#define MHU_TIMEOUT_DELAY	10
+#define MHU_TIMEOUT_ITERS	10000
+
+static DEFINE_BAKERY_LOCK(mhu_secure_message_lock);
+
+static bool sunxi_msgbox_last_tx_done(unsigned int chan)
+{
+	uint32_t stat = mmio_read_32(SUNXI_MSGBOX_BASE + REMOTE_IRQ_STAT_REG);
+
+	return (stat & RX_IRQ(chan)) == 0U;
+}
+
+static bool sunxi_msgbox_peek_data(unsigned int chan)
+{
+	uint32_t stat = mmio_read_32(SUNXI_MSGBOX_BASE + MSG_STAT_REG(chan));
+
+	return (stat & MSG_STAT_MASK) != 0U;
+}
+
+void mhu_secure_message_start(unsigned int slot_id __unused)
+{
+	uint32_t timeout = MHU_TIMEOUT_ITERS;
+
+	bakery_lock_get(&mhu_secure_message_lock);
+
+	/* Wait for all previous messages to be acknowledged. */
+	while (!sunxi_msgbox_last_tx_done(TX_CHAN) && --timeout)
+		udelay(MHU_TIMEOUT_DELAY);
+}
+
+void mhu_secure_message_send(unsigned int slot_id)
+{
+	mmio_write_32(SUNXI_MSGBOX_BASE + MSG_DATA_REG(TX_CHAN), BIT(slot_id));
+}
+
+uint32_t mhu_secure_message_wait(void)
+{
+	uint32_t timeout = MHU_TIMEOUT_ITERS;
+	uint32_t msg = 0;
+
+	/* Wait for a message from the SCP. */
+	while (!sunxi_msgbox_peek_data(RX_CHAN) && --timeout)
+		udelay(MHU_TIMEOUT_DELAY);
+
+	/* Return the most recent message in the FIFO. */
+	while (sunxi_msgbox_peek_data(RX_CHAN))
+		msg = mmio_read_32(SUNXI_MSGBOX_BASE + MSG_DATA_REG(RX_CHAN));
+
+	return msg;
+}
+
+void mhu_secure_message_end(unsigned int slot_id)
+{
+	/* Acknowledge a response by clearing the IRQ status. */
+	mmio_write_32(SUNXI_MSGBOX_BASE + LOCAL_IRQ_STAT_REG, RX_IRQ(RX_CHAN));
+
+	bakery_lock_release(&mhu_secure_message_lock);
+}
diff --git a/drivers/allwinner/sunxi_rsb.c b/drivers/allwinner/sunxi_rsb.c
new file mode 100644
index 0000000..67f5b7e
--- /dev/null
+++ b/drivers/allwinner/sunxi_rsb.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2017-2018 ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <errno.h>
+
+#include <common/debug.h>
+#include <drivers/delay_timer.h>
+#include <lib/mmio.h>
+
+#include <sunxi_mmap.h>
+
+#define RSB_CTRL	0x00
+#define RSB_CCR		0x04
+#define RSB_INTE	0x08
+#define RSB_STAT	0x0c
+#define RSB_DADDR0	0x10
+#define RSB_DLEN	0x18
+#define RSB_DATA0	0x1c
+#define RSB_LCR		0x24
+#define RSB_PMCR	0x28
+#define RSB_CMD		0x2c
+#define RSB_SADDR	0x30
+
+#define RSBCMD_SRTA	0xE8
+#define RSBCMD_RD8	0x8B
+#define RSBCMD_RD16	0x9C
+#define RSBCMD_RD32	0xA6
+#define RSBCMD_WR8	0x4E
+#define RSBCMD_WR16	0x59
+#define RSBCMD_WR32	0x63
+
+#define MAX_TRIES	100000
+
+static int rsb_wait_bit(const char *desc, unsigned int offset, uint32_t mask)
+{
+	uint32_t reg, tries = MAX_TRIES;
+
+	do
+		reg = mmio_read_32(SUNXI_R_RSB_BASE + offset);
+	while ((reg & mask) && --tries);	/* transaction in progress */
+	if (reg & mask) {
+		ERROR("%s: timed out\n", desc);
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int rsb_wait_stat(const char *desc)
+{
+	uint32_t reg;
+	int ret = rsb_wait_bit(desc, RSB_CTRL, BIT(7));
+
+	if (ret)
+		return ret;
+
+	reg = mmio_read_32(SUNXI_R_RSB_BASE + RSB_STAT);
+	if (reg == 0x01)
+		return 0;
+
+	ERROR("%s: 0x%x\n", desc, reg);
+	return -reg;
+}
+
+/* Initialize the RSB controller. */
+int rsb_init_controller(void)
+{
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_CTRL, 0x01); /* soft reset */
+
+	return rsb_wait_bit("RSB: reset controller", RSB_CTRL, BIT(0));
+}
+
+int rsb_read(uint8_t rt_addr, uint8_t reg_addr)
+{
+	int ret;
+
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_CMD, RSBCMD_RD8); /* read a byte */
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_SADDR, rt_addr << 16);
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_DADDR0, reg_addr);
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_CTRL, 0x80);/* start transaction */
+
+	ret = rsb_wait_stat("RSB: read command");
+	if (ret)
+		return ret;
+
+	return mmio_read_32(SUNXI_R_RSB_BASE + RSB_DATA0) & 0xff; /* result */
+}
+
+int rsb_write(uint8_t rt_addr, uint8_t reg_addr, uint8_t value)
+{
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_CMD, RSBCMD_WR8);	/* byte write */
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_SADDR, rt_addr << 16);
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_DADDR0, reg_addr);
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_DATA0, value);
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_CTRL, 0x80);/* start transaction */
+
+	return rsb_wait_stat("RSB: write command");
+}
+
+int rsb_set_device_mode(uint32_t device_mode)
+{
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_PMCR,
+		      (device_mode & 0x00ffffff) | BIT(31));
+
+	return rsb_wait_bit("RSB: set device to RSB", RSB_PMCR, BIT(31));
+}
+
+int rsb_set_bus_speed(uint32_t source_freq, uint32_t bus_freq)
+{
+	uint32_t reg;
+
+	if (bus_freq == 0)
+		return -EINVAL;
+
+	reg = source_freq / bus_freq;
+	if (reg < 2)
+		return -EINVAL;
+
+	reg = reg / 2 - 1;
+	reg |= (1U << 8);		/* one cycle of CD output delay */
+
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_CCR, reg);
+
+	return 0;
+}
+
+/* Initialize the RSB PMIC connection. */
+int rsb_assign_runtime_address(uint16_t hw_addr, uint8_t rt_addr)
+{
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_SADDR, hw_addr | (rt_addr << 16));
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_CMD, RSBCMD_SRTA);
+	mmio_write_32(SUNXI_R_RSB_BASE + RSB_CTRL, 0x80);
+
+	return rsb_wait_stat("RSB: set run-time address");
+}