Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 227 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/remoteproc/stm32_copro.c b/roms/u-boot/drivers/remoteproc/stm32_copro.c
new file mode 100644
index 000000000..4c5f24857
--- /dev/null
+++ b/roms/u-boot/drivers/remoteproc/stm32_copro.c
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
+ */
+#define LOG_CATEGORY UCLASS_REMOTEPROC
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <log.h>
+#include <remoteproc.h>
+#include <reset.h>
+#include <asm/io.h>
+#include <dm/device_compat.h>
+#include <linux/err.h>
+
+/**
+ * struct stm32_copro_privdata - power processor private data
+ * @reset_ctl:		reset controller handle
+ * @hold_boot:		hold boot controller handle
+ * @rsc_table_addr:	resource table address
+ */
+struct stm32_copro_privdata {
+	struct reset_ctl reset_ctl;
+	struct reset_ctl hold_boot;
+	ulong rsc_table_addr;
+};
+
+/**
+ * stm32_copro_probe() - Basic probe
+ * @dev:	corresponding STM32 remote processor device
+ * @return 0 if all went ok, else corresponding -ve error
+ */
+static int stm32_copro_probe(struct udevice *dev)
+{
+	struct stm32_copro_privdata *priv;
+	int ret;
+
+	priv = dev_get_priv(dev);
+
+	ret = reset_get_by_name(dev, "mcu_rst", &priv->reset_ctl);
+	if (ret) {
+		dev_err(dev, "failed to get reset (%d)\n", ret);
+		return ret;
+	}
+
+	ret = reset_get_by_name(dev, "hold_boot", &priv->hold_boot);
+	if (ret) {
+		dev_err(dev, "failed to get hold boot (%d)\n", ret);
+		return ret;
+	}
+
+	dev_dbg(dev, "probed\n");
+
+	return 0;
+}
+
+/**
+ * stm32_copro_device_to_virt() - Convert device address to virtual address
+ * @dev:	corresponding STM32 remote processor device
+ * @da:		device address
+ * @size:	Size of the memory region @da is pointing to
+ * @return converted virtual address
+ */
+static void *stm32_copro_device_to_virt(struct udevice *dev, ulong da,
+					ulong size)
+{
+	fdt32_t in_addr = cpu_to_be32(da), end_addr;
+	u64 paddr;
+
+	paddr = dev_translate_dma_address(dev, &in_addr);
+	if (paddr == OF_BAD_ADDR) {
+		dev_err(dev, "Unable to convert address %ld\n", da);
+		return NULL;
+	}
+
+	end_addr = cpu_to_be32(da + size - 1);
+	if (dev_translate_dma_address(dev, &end_addr) == OF_BAD_ADDR) {
+		dev_err(dev, "Unable to convert address %ld\n", da + size - 1);
+		return NULL;
+	}
+
+	return phys_to_virt(paddr);
+}
+
+/**
+ * stm32_copro_load() - Loadup the STM32 remote processor
+ * @dev:	corresponding STM32 remote processor device
+ * @addr:	Address in memory where image is stored
+ * @size:	Size in bytes of the image
+ * @return 0 if all went ok, else corresponding -ve error
+ */
+static int stm32_copro_load(struct udevice *dev, ulong addr, ulong size)
+{
+	struct stm32_copro_privdata *priv;
+	ulong rsc_table_size;
+	int ret;
+
+	priv = dev_get_priv(dev);
+
+	ret = reset_assert(&priv->hold_boot);
+	if (ret) {
+		dev_err(dev, "Unable to assert hold boot (ret=%d)\n", ret);
+		return ret;
+	}
+
+	ret = reset_assert(&priv->reset_ctl);
+	if (ret) {
+		dev_err(dev, "Unable to assert reset line (ret=%d)\n", ret);
+		return ret;
+	}
+
+	if (rproc_elf32_load_rsc_table(dev, addr, size, &priv->rsc_table_addr,
+				       &rsc_table_size)) {
+		priv->rsc_table_addr = 0;
+		dev_warn(dev, "No valid resource table for this firmware\n");
+	}
+
+	return rproc_elf32_load_image(dev, addr, size);
+}
+
+/**
+ * stm32_copro_start() - Start the STM32 remote processor
+ * @dev:	corresponding STM32 remote processor device
+ * @return 0 if all went ok, else corresponding -ve error
+ */
+static int stm32_copro_start(struct udevice *dev)
+{
+	struct stm32_copro_privdata *priv;
+	int ret;
+
+	priv = dev_get_priv(dev);
+
+	ret = reset_deassert(&priv->hold_boot);
+	if (ret) {
+		dev_err(dev, "Unable to deassert hold boot (ret=%d)\n", ret);
+		return ret;
+	}
+
+	/*
+	 * Once copro running, reset hold boot flag to avoid copro
+	 * rebooting autonomously (error should never occur)
+	 */
+	ret = reset_assert(&priv->hold_boot);
+	if (ret)
+		dev_err(dev, "Unable to assert hold boot (ret=%d)\n", ret);
+
+	/* indicates that copro is running */
+	writel(TAMP_COPRO_STATE_CRUN, TAMP_COPRO_STATE);
+	/* Store rsc_address in bkp register */
+	writel(priv->rsc_table_addr, TAMP_COPRO_RSC_TBL_ADDRESS);
+
+	return 0;
+}
+
+/**
+ * stm32_copro_reset() - Reset the STM32 remote processor
+ * @dev:	corresponding STM32 remote processor device
+ * @return 0 if all went ok, else corresponding -ve error
+ */
+static int stm32_copro_reset(struct udevice *dev)
+{
+	struct stm32_copro_privdata *priv;
+	int ret;
+
+	priv = dev_get_priv(dev);
+
+	ret = reset_assert(&priv->hold_boot);
+	if (ret) {
+		dev_err(dev, "Unable to assert hold boot (ret=%d)\n", ret);
+		return ret;
+	}
+
+	ret = reset_assert(&priv->reset_ctl);
+	if (ret) {
+		dev_err(dev, "Unable to assert reset line (ret=%d)\n", ret);
+		return ret;
+	}
+
+	writel(TAMP_COPRO_STATE_OFF, TAMP_COPRO_STATE);
+
+	return 0;
+}
+
+/**
+ * stm32_copro_stop() - Stop the STM32 remote processor
+ * @dev:	corresponding STM32 remote processor device
+ * @return 0 if all went ok, else corresponding -ve error
+ */
+static int stm32_copro_stop(struct udevice *dev)
+{
+	return stm32_copro_reset(dev);
+}
+
+/**
+ * stm32_copro_is_running() - Is the STM32 remote processor running
+ * @dev:	corresponding STM32 remote processor device
+ * @return 0 if the remote processor is running, 1 otherwise
+ */
+static int stm32_copro_is_running(struct udevice *dev)
+{
+	return (readl(TAMP_COPRO_STATE) == TAMP_COPRO_STATE_OFF);
+}
+
+static const struct dm_rproc_ops stm32_copro_ops = {
+	.load = stm32_copro_load,
+	.start = stm32_copro_start,
+	.stop =  stm32_copro_stop,
+	.reset = stm32_copro_reset,
+	.is_running = stm32_copro_is_running,
+	.device_to_virt = stm32_copro_device_to_virt,
+};
+
+static const struct udevice_id stm32_copro_ids[] = {
+	{.compatible = "st,stm32mp1-m4"},
+	{}
+};
+
+U_BOOT_DRIVER(stm32_copro) = {
+	.name = "stm32_m4_proc",
+	.of_match = stm32_copro_ids,
+	.id = UCLASS_REMOTEPROC,
+	.ops = &stm32_copro_ops,
+	.probe = stm32_copro_probe,
+	.priv_auto	= sizeof(struct stm32_copro_privdata),
+};