1 files changed, 719 insertions, 0 deletions
diff --git a/drivers/remoteproc/qcom_tz_pil.c b/drivers/remoteproc/qcom_tz_pil.c
new file mode 100644
index 000000000000..2f43b00fee13
--- /dev/null
+++ b/drivers/remoteproc/qcom_tz_pil.c
@@ -0,0 +1,719 @@
+/*
+ * Qualcomm Peripheral Image Loader
+ *
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/remoteproc.h>
+#include <linux/interrupt.h>
+#include <linux/memblock.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of.h>
+#include <linux/elf.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/regulator/consumer.h>
+#include <linux/qcom_scm.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/delay.h>
+#include <linux/soc/qcom/smd.h>
+
+#include "remoteproc_internal.h"
+
+#define PAS_INIT_IMAGE_CMD      1
+#define PAS_MEM_SETUP_CMD       2
+#define PAS_AUTH_AND_RESET_CMD  5
+#define PAS_SHUTDOWN_CMD        6
+#define PAS_IS_SUPPORTED_CMD    7
+
+struct qproc {
+	struct device *dev;
+	struct rproc *rproc;
+
+	int pas_id;
+
+	int wdog_irq;
+	int fatal_irq;
+	int ready_irq;
+	int handover_irq;
+	int stop_ack_irq;
+
+	struct gpio_desc *stop_gpio;
+
+	const char *name;
+	struct regulator *pll;
+
+	unsigned proxy_clk_count;
+	struct clk *scm_core_clk;
+	struct clk *scm_iface_clk;
+	struct clk *scm_bus_clk;
+	struct clk *scm_src_clk;
+
+	struct clk **proxy_clks;
+
+	struct completion start_done;
+	struct completion stop_done;
+
+	unsigned crash_reason;
+	struct device_node *smd_edge_node;
+
+	phys_addr_t reloc_phys;
+	size_t reloc_size;
+};
+
+static int qproc_scm_clk_enable(struct qproc *qproc)
+{
+	int ret;
+
+	ret = clk_prepare_enable(qproc->scm_core_clk);
+	if (ret)
+		goto bail;
+	ret = clk_prepare_enable(qproc->scm_iface_clk);
+	if (ret)
+		goto disable_core;
+	ret = clk_prepare_enable(qproc->scm_bus_clk);
+	if (ret)
+		goto disable_iface;
+
+	ret = clk_prepare_enable(qproc->scm_src_clk);
+	if (ret)
+		goto disable_bus;
+
+	return 0;
+
+disable_bus:
+	clk_disable_unprepare(qproc->scm_bus_clk);
+disable_iface:
+	clk_disable_unprepare(qproc->scm_iface_clk);
+disable_core:
+	clk_disable_unprepare(qproc->scm_core_clk);
+bail:
+	return ret;
+}
+
+static void qproc_scm_clk_disable(struct qproc *qproc)
+{
+	clk_disable_unprepare(qproc->scm_core_clk);
+	clk_disable_unprepare(qproc->scm_iface_clk);
+	clk_disable_unprepare(qproc->scm_bus_clk);
+	clk_disable_unprepare(qproc->scm_src_clk);
+}
+
+/**
+ * struct pil_mdt - Representation of <name>.mdt file in memory
+ * @hdr: ELF32 header
+ * @phdr: ELF32 program headers
+ */
+struct mdt_hdr {
+	struct elf32_hdr hdr;
+	struct elf32_phdr phdr[];
+};
+
+#define segment_is_hash(flag) (((flag) & (0x7 << 24)) == (0x2 << 24))
+
+static int segment_is_loadable(const struct elf32_phdr *p)
+{
+	return (p->p_type == PT_LOAD) &&
+	       !segment_is_hash(p->p_flags) &&
+	       p->p_memsz;
+}
+
+static bool segment_is_relocatable(const struct elf32_phdr *p)
+{
+	return !!(p->p_flags & BIT(27));
+}
+
+/**
+ * rproc_mdt_sanity_check() - sanity check mdt firmware header
+ * @rproc: the remote processor handle
+ * @fw: the mdt header firmware image
+ */
+static int qproc_sanity_check(struct rproc *rproc,
+				  const struct firmware *fw)
+{
+	struct elf32_hdr *ehdr;
+	struct mdt_hdr *mdt;
+
+	if (!fw) {
+		dev_err(&rproc->dev, "failed to load %s\n", rproc->name);
+		return -EINVAL;
+	}
+
+	if (fw->size < sizeof(struct elf32_hdr)) {
+		dev_err(&rproc->dev, "image is too small\n");
+		return -EINVAL;
+	}
+
+	mdt = (struct mdt_hdr *)fw->data;
+	ehdr = &mdt->hdr;
+
+	if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) {
+		dev_err(&rproc->dev, "image is corrupted (bad magic)\n");
+		return -EINVAL;
+	}
+
+	if (ehdr->e_phnum == 0) {
+		dev_err(&rproc->dev, "no loadable segments\n");
+		return -EINVAL;
+	}
+
+	if (sizeof(struct elf32_phdr) * ehdr->e_phnum +
+	    sizeof(struct elf32_hdr) > fw->size) {
+		dev_err(&rproc->dev, "firmware size is too small\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct resource_table * qproc_find_rsc_table(struct rproc *rproc,
+						    const struct firmware *fw,
+						    int *tablesz)
+{
+	static struct resource_table table = { .ver = 1, };
+
+	*tablesz = sizeof(table);
+	return &table;
+}
+
+static int qproc_load_segment(struct rproc *rproc, const char *fw_name,
+				const struct elf32_phdr *phdr, phys_addr_t paddr)
+{
+	const struct firmware *fw;
+	void *ptr;
+	int ret = 0;
+
+	ptr = ioremap_nocache(paddr, phdr->p_memsz);
+	if (!ptr) {
+		dev_err(&rproc->dev, "failed to ioremap segment area (%pa+0x%x)\n", &paddr, phdr->p_memsz);
+		return -EBUSY;
+	}
+
+	if (phdr->p_filesz) {
+		ret = request_firmware(&fw, fw_name, &rproc->dev);
+		if (ret) {
+			dev_err(&rproc->dev, "failed to load %s\n", fw_name);
+			goto out;
+		}
+
+		memcpy_toio(ptr, fw->data, fw->size);
+
+		release_firmware(fw);
+	}
+
+	if (phdr->p_memsz > phdr->p_filesz)
+		memset_io(ptr + phdr->p_filesz, 0,
+			  phdr->p_memsz - phdr->p_filesz);
+
+out:
+	iounmap(ptr);
+	return ret;
+}
+
+static int qproc_load(struct rproc *rproc, const struct firmware *fw)
+{
+	const struct elf32_phdr *phdr;
+	const struct elf32_hdr *ehdr;
+	const struct mdt_hdr *mdt;
+	phys_addr_t min_addr = (phys_addr_t)ULLONG_MAX;
+	phys_addr_t max_addr = 0;
+	phys_addr_t diff_addr;
+	struct qproc *qproc = rproc->priv;
+	char *fw_name;
+	int ret;
+	int i;
+	size_t align = 0;
+	bool relocatable = false;
+	phys_addr_t paddr;
+
+	ret = qproc_scm_clk_enable(qproc);
+	if (ret)
+		return ret;
+
+	mdt = (struct mdt_hdr *)fw->data;
+	ehdr = &mdt->hdr;
+
+	for (i = 0; i < ehdr->e_phnum; i++) {
+		phdr = &mdt->phdr[i];
+
+		if (!segment_is_loadable(phdr))
+			continue;
+
+		if (phdr->p_paddr < min_addr) {
+			min_addr = phdr->p_paddr;
+
+			if (segment_is_relocatable(phdr)) {
+				align = phdr->p_align;
+				relocatable = true;
+			}
+		}
+
+		if (phdr->p_paddr + phdr->p_memsz > max_addr)
+			max_addr = round_up(phdr->p_paddr + phdr->p_memsz, SZ_4K);
+	}
+
+	ret = qcom_scm_pas_init_image(qproc->dev,
+				qproc->pas_id, fw->data, fw->size);
+	if (ret) {
+		dev_err(qproc->dev, "Invalid firmware metadata\n");
+		return -EINVAL;
+	}
+
+	diff_addr = max_addr - min_addr;
+	dev_dbg(qproc->dev, "pas_mem_setup %pa, %pa\n", &min_addr, &diff_addr);
+
+	ret = qcom_scm_pas_mem_setup(qproc->pas_id,
+		relocatable ? qproc->reloc_phys : min_addr, max_addr - min_addr);
+	if (ret) {
+		dev_err(qproc->dev, "unable to setup memory for image\n");
+		return -EINVAL;
+	}
+
+	fw_name = kzalloc(strlen(qproc->name) + 5, GFP_KERNEL);
+	if (!fw_name)
+		return -ENOMEM;
+
+	for (i = 0; i < ehdr->e_phnum; i++) {
+		phdr = &mdt->phdr[i];
+
+		if (!segment_is_loadable(phdr))
+			continue;
+
+		paddr = relocatable ?
+				(phdr->p_paddr - min_addr + qproc->reloc_phys) :
+				phdr->p_paddr;
+		sprintf(fw_name, "%s.b%02d", qproc->name, i);
+		ret = qproc_load_segment(rproc, fw_name, phdr, paddr);
+		if (ret)
+			break;
+	}
+
+	kfree(fw_name);
+
+	qproc_scm_clk_disable(qproc);
+
+	return 0;
+}
+
+const struct rproc_fw_ops qproc_fw_ops = {
+	.find_rsc_table = qproc_find_rsc_table,
+	.load = qproc_load,
+	.sanity_check = qproc_sanity_check,
+};
+
+static int qproc_start(struct rproc *rproc)
+{
+	struct qproc *qproc = (struct qproc *)rproc->priv;
+	int ret;
+
+	ret = regulator_enable(qproc->pll);
+	if (ret) {
+		dev_err(qproc->dev, "failed to enable pll supply\n");
+		return ret;
+	}
+
+	ret = qproc_scm_clk_enable(qproc);
+	if (ret)
+		goto disable_regulator;
+
+	ret = qcom_scm_pas_auth_and_reset(qproc->pas_id);
+	if (ret) {
+		dev_err(qproc->dev,
+				"failed to authenticate image and release reset\n");
+		goto unroll_clocks;
+	}
+
+	/* if ready irq not provided skip waiting */
+	if (qproc->ready_irq < 0)
+		goto done;
+
+	ret = wait_for_completion_timeout(&qproc->start_done, msecs_to_jiffies(10000));
+	if (ret == 0) {
+		dev_err(qproc->dev, "start timed out\n");
+
+		qcom_scm_pas_shutdown(qproc->pas_id);
+		goto unroll_clocks;
+	}
+
+done:
+	dev_info(qproc->dev, "start successful\n");
+
+	return 0;
+
+unroll_clocks:
+	qproc_scm_clk_disable(qproc);
+
+disable_regulator:
+	regulator_disable(qproc->pll);
+
+	return ret;
+}
+
+static int qproc_stop(struct rproc *rproc)
+{
+	return 0;
+}
+
+static const struct rproc_ops qproc_ops = {
+	.start = qproc_start,
+	.stop = qproc_stop,
+};
+
+static irqreturn_t qproc_wdog_interrupt(int irq, void *dev)
+{
+	struct qproc *qproc = dev;
+
+	rproc_report_crash(qproc->rproc, RPROC_WATCHDOG);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t qproc_fatal_interrupt(int irq, void *dev)
+{
+	struct qproc *qproc = dev;
+	size_t len;
+	char *msg;
+	int ret;
+
+	ret = qcom_smem_get(-1, qproc->crash_reason, (void**)&msg, &len);
+	if (!ret && len > 0 && msg[0])
+		dev_err(qproc->dev, "fatal error received: %s\n", msg);
+
+	rproc_report_crash(qproc->rproc, RPROC_FATAL_ERROR);
+
+	if (!ret)
+		msg[0] = '\0';
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t qproc_ready_interrupt(int irq, void *dev)
+{
+	struct qproc *qproc = dev;
+
+	complete(&qproc->start_done);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t qproc_handover_interrupt(int irq, void *dev)
+{
+	struct qproc *qproc = dev;
+
+	qproc_scm_clk_disable(qproc);
+	regulator_disable(qproc->pll);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t qproc_stop_ack_interrupt(int irq, void *dev)
+{
+	struct qproc *qproc = dev;
+
+	complete(&qproc->stop_done);
+	return IRQ_HANDLED;
+}
+
+static ssize_t qproc_boot_store(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t size)
+{
+	struct qproc *qproc = dev_get_drvdata(dev);
+	int ret;
+
+	ret = rproc_boot(qproc->rproc);
+	return ret ? : size;
+}
+
+static ssize_t qproc_shutdown_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t size)
+{
+	struct qproc *qproc = dev_get_drvdata(dev);
+
+	rproc_shutdown(qproc->rproc);
+	return size;
+}
+
+static const struct device_attribute qproc_attrs[] = {
+	__ATTR(boot, S_IWUSR, 0, qproc_boot_store),
+	__ATTR(shutdown, S_IWUSR, 0, qproc_shutdown_store),
+};
+
+static int qproc_init_pas(struct qproc *qproc)
+{
+	char *key;
+	int ret;
+
+	key = "qcom,pas-id";
+	ret = of_property_read_u32(qproc->dev->of_node, key, &qproc->pas_id);
+	if (ret) {
+		dev_err(qproc->dev, "Missing or incorrect %s\n", key);
+		return -EINVAL;
+	}
+
+	if (!qcom_scm_pas_supported(qproc->pas_id)) {
+		dev_err(qproc->dev, "PAS is not available for %d\n", qproc->pas_id);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int qproc_init_clocks(struct qproc *qproc)
+{
+	long rate;
+	int ret;
+
+	qproc->scm_core_clk = devm_clk_get(qproc->dev, "scm_core_clk");
+	if (IS_ERR(qproc->scm_core_clk)) {
+		if (PTR_ERR(qproc->scm_core_clk) != -EPROBE_DEFER)
+			dev_err(qproc->dev, "failed to acquire scm_core_clk\n");
+		return PTR_ERR(qproc->scm_core_clk);
+	}
+
+	qproc->scm_iface_clk = devm_clk_get(qproc->dev, "scm_iface_clk");
+	if (IS_ERR(qproc->scm_iface_clk)) {
+		if (PTR_ERR(qproc->scm_iface_clk) != -EPROBE_DEFER)
+			dev_err(qproc->dev, "failed to acquire scm_iface_clk\n");
+		return PTR_ERR(qproc->scm_iface_clk);
+	}
+
+	qproc->scm_bus_clk = devm_clk_get(qproc->dev, "scm_bus_clk");
+	if (IS_ERR(qproc->scm_bus_clk)) {
+		if (PTR_ERR(qproc->scm_bus_clk) != -EPROBE_DEFER)
+			dev_err(qproc->dev, "failed to acquire scm_bus_clk\n");
+		return PTR_ERR(qproc->scm_bus_clk);
+	}
+
+	qproc->scm_src_clk = devm_clk_get(qproc->dev, "scm_src_clk");
+	if (IS_ERR(qproc->scm_src_clk)) {
+		if (PTR_ERR(qproc->scm_src_clk) != -EPROBE_DEFER)
+			dev_err(qproc->dev, "failed to acquire scm_src_clk\n");
+		return PTR_ERR(qproc->scm_src_clk);
+	}
+
+	ret = clk_set_rate(qproc->scm_core_clk,
+clk_round_rate(qproc->scm_core_clk, 19200000));
+	ret = clk_set_rate(qproc->scm_bus_clk,
+clk_round_rate(qproc->scm_bus_clk, 19200000));
+	ret = clk_set_rate(qproc->scm_iface_clk,
+clk_round_rate(qproc->scm_iface_clk, 19200000));
+	rate = clk_round_rate(qproc->scm_core_clk, 80000000);
+	ret = clk_set_rate(qproc->scm_src_clk, rate);
+	if (ret) {
+		dev_err(qproc->dev, "failed to set rate of scm_core_clk\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int qproc_init_regulators(struct qproc *qproc)
+{
+	int ret;
+	u32 uA;
+	u32 uV;
+
+	qproc->pll = devm_regulator_get(qproc->dev, "qcom,pll");
+	if (IS_ERR(qproc->pll)) {
+		if (PTR_ERR(qproc->pll) != -EPROBE_DEFER)
+			dev_err(qproc->dev, "failed to aquire regulator\n");
+		return PTR_ERR(qproc->pll);
+	}
+
+	ret = of_property_read_u32(qproc->dev->of_node, "qcom,pll-uV", &uV);
+	if (ret)
+		dev_warn(qproc->dev, "failed to read qcom,pll_uV, skipping\n");
+	else
+		regulator_set_voltage(qproc->pll, uV, uV);
+
+	ret = of_property_read_u32(qproc->dev->of_node, "qcom,pll-uA", &uA);
+	if (ret)
+		dev_warn(qproc->dev, "failed to read qcom,pll_uA, skipping\n");
+	else
+		regulator_set_load(qproc->pll, uA);
+
+	return 0;
+}
+
+static int qproc_request_irq(struct qproc *qproc, struct platform_device *pdev, const char *name, irq_handler_t thread_fn)
+{
+	int ret;
+
+	ret = platform_get_irq_byname(pdev, name);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "no %s IRQ defined\n", name);
+		return ret;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, ret,
+					NULL, thread_fn,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"qproc", qproc);
+	if (ret)
+		dev_err(&pdev->dev, "request %s IRQ failed\n", name);
+	return ret;
+}
+
+static int qproc_probe(struct platform_device *pdev)
+{
+	struct qproc *qproc;
+	struct rproc *rproc;
+	char *fw_name;
+	const char *name;
+	const char *key;
+	int ret;
+	int i;
+	struct device_node *np;
+	struct resource r;
+
+
+	key = "qcom,firmware-name";
+	ret = of_property_read_string(pdev->dev.of_node, key, &name);
+	if (ret) {
+		dev_err(&pdev->dev, "missing or incorrect %s\n", key);
+		return -EINVAL;
+	}
+
+	fw_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s.mdt", name);
+	if (!fw_name)
+		return -ENOMEM;
+
+	rproc = rproc_alloc(&pdev->dev, pdev->name, &qproc_ops,
+			    fw_name, sizeof(*qproc));
+	if (!rproc) {
+		dev_err(&pdev->dev, "unable to allocate remoteproc\n");
+		return -ENOMEM;
+	}
+
+	rproc->fw_ops = &qproc_fw_ops;
+
+	qproc = (struct qproc *)rproc->priv;
+	qproc->dev = &pdev->dev;
+	qproc->rproc = rproc;
+	qproc->name = name;
+	platform_set_drvdata(pdev, qproc);
+
+	init_completion(&qproc->start_done);
+	init_completion(&qproc->stop_done);
+
+	ret = of_property_read_u32(pdev->dev.of_node, "qcom,crash-reason",
+				   &qproc->crash_reason);
+	if (ret)
+		dev_info(&pdev->dev, "no crash reason id\n");
+
+	qproc->smd_edge_node = of_parse_phandle(pdev->dev.of_node,
+						"qcom,smd-edges", 0);
+
+	ret = qproc_init_pas(qproc);
+	if (ret)
+		goto free_rproc;
+
+	ret = qproc_init_clocks(qproc);
+	if (ret)
+		goto free_rproc;
+
+	ret = qproc_init_regulators(qproc);
+	if (ret)
+		goto free_rproc;
+
+	ret = qproc_request_irq(qproc, pdev, "wdog", qproc_wdog_interrupt);
+	qproc->wdog_irq = ret;
+
+	ret = qproc_request_irq(qproc, pdev, "fatal", qproc_fatal_interrupt);
+	qproc->fatal_irq = ret;
+
+	ret = qproc_request_irq(qproc, pdev, "ready", qproc_ready_interrupt);
+	qproc->ready_irq = ret;
+
+	ret = qproc_request_irq(qproc, pdev, "handover", qproc_handover_interrupt);
+	qproc->handover_irq = ret;
+
+	ret = qproc_request_irq(qproc, pdev, "stop-ack", qproc_stop_ack_interrupt);
+	qproc->stop_ack_irq = ret;
+
+	for (i = 0; i < ARRAY_SIZE(qproc_attrs); i++) {
+		ret = device_create_file(&pdev->dev, &qproc_attrs[i]);
+		if (ret) {
+			dev_err(&pdev->dev, "unable to create sysfs file\n");
+			goto remove_device_files;
+		}
+	}
+
+	np = of_parse_phandle(pdev->dev.of_node, "memory-region", 0);
+	if (!np) {
+		dev_err(&pdev->dev, "No memory region specified\n");
+	} else {
+
+		ret = of_address_to_resource(np, 0, &r);
+		of_node_put(np);
+		if (ret)
+			return ret;
+
+		qproc->reloc_phys = r.start;
+		qproc->reloc_size = resource_size(&r);
+
+		dev_info(&pdev->dev, "Found relocation area %lu@%pad\n",
+				qproc->reloc_size, &qproc->reloc_phys);
+	}
+
+	ret = rproc_add(rproc);
+	if (ret)
+		goto remove_device_files;
+
+	return 0;
+
+remove_device_files:
+	for (i--; i >= 0; i--)
+		device_remove_file(&pdev->dev, &qproc_attrs[i]);
+
+free_rproc:
+	rproc_put(rproc);
+
+	return ret;
+}
+
+static int qproc_remove(struct platform_device *pdev)
+{
+	struct qproc *qproc = platform_get_drvdata(pdev);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(qproc_attrs); i++)
+		device_remove_file(&pdev->dev, &qproc_attrs[i]);
+
+	rproc_put(qproc->rproc);
+
+	return 0;
+}
+
+static const struct of_device_id qproc_of_match[] = {
+	{ .compatible = "qcom,tz-pil", },
+	{ },
+};
+
+static struct platform_driver qproc_driver = {
+	.probe = qproc_probe,
+	.remove = qproc_remove,
+	.driver = {
+		.name = "qcom-tz-pil",
+		.of_match_table = qproc_of_match,
+	},
+};
+
+module_platform_driver(qproc_driver);