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authorBjorn Andersson <bjorn.andersson@sonymobile.com>2016-08-12 18:18:59 -0700
committerBjorn Andersson <bjorn.andersson@linaro.org>2016-08-18 12:48:46 -0700
commitaed361adca9ff1d828843f3afc5d9140a2fa410d (patch)
tree81913edcd62ba817a1515c0ff02a9a5e74a614b3 /drivers/remoteproc/qcom_wcnss_iris.c
parent3103405f0a570b5472560ed094e562cba9d33028 (diff)
downloadlinux-aed361adca9ff1d828843f3afc5d9140a2fa410d.tar.gz
remoteproc: qcom: Introduce WCNSS peripheral image loader
This introduces the peripheral image loader, for loading WCNSS firmware and boot the core on e.g. MSM8974. The firmware is verified and booted with the help of the Peripheral Authentication System (PAS) in TrustZone. Tested-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc/qcom_wcnss_iris.c')
-rw-r--r--drivers/remoteproc/qcom_wcnss_iris.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/remoteproc/qcom_wcnss_iris.c b/drivers/remoteproc/qcom_wcnss_iris.c
new file mode 100644
index 000000000000..f0ca24a8dd0b
--- /dev/null
+++ b/drivers/remoteproc/qcom_wcnss_iris.c
@@ -0,0 +1,188 @@
+/*
+ * Qualcomm Wireless Connectivity Subsystem Iris driver
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * 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/clk.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+#include "qcom_wcnss.h"
+
+struct qcom_iris {
+ struct device *dev;
+
+ struct clk *xo_clk;
+
+ struct regulator_bulk_data *vregs;
+ size_t num_vregs;
+};
+
+struct iris_data {
+ const struct wcnss_vreg_info *vregs;
+ size_t num_vregs;
+
+ bool use_48mhz_xo;
+};
+
+static const struct iris_data wcn3620_data = {
+ .vregs = (struct wcnss_vreg_info[]) {
+ { "vddxo", 1800000, 1800000, 10000 },
+ { "vddrfa", 1300000, 1300000, 100000 },
+ { "vddpa", 3300000, 3300000, 515000 },
+ { "vdddig", 1800000, 1800000, 10000 },
+ },
+ .num_vregs = 4,
+ .use_48mhz_xo = false,
+};
+
+static const struct iris_data wcn3660_data = {
+ .vregs = (struct wcnss_vreg_info[]) {
+ { "vddxo", 1800000, 1800000, 10000 },
+ { "vddrfa", 1300000, 1300000, 100000 },
+ { "vddpa", 2900000, 3000000, 515000 },
+ { "vdddig", 1200000, 1225000, 10000 },
+ },
+ .num_vregs = 4,
+ .use_48mhz_xo = true,
+};
+
+static const struct iris_data wcn3680_data = {
+ .vregs = (struct wcnss_vreg_info[]) {
+ { "vddxo", 1800000, 1800000, 10000 },
+ { "vddrfa", 1300000, 1300000, 100000 },
+ { "vddpa", 3300000, 3300000, 515000 },
+ { "vdddig", 1800000, 1800000, 10000 },
+ },
+ .num_vregs = 4,
+ .use_48mhz_xo = true,
+};
+
+int qcom_iris_enable(struct qcom_iris *iris)
+{
+ int ret;
+
+ ret = regulator_bulk_enable(iris->num_vregs, iris->vregs);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(iris->xo_clk);
+ if (ret) {
+ dev_err(iris->dev, "failed to enable xo clk\n");
+ goto disable_regulators;
+ }
+
+ return 0;
+
+disable_regulators:
+ regulator_bulk_disable(iris->num_vregs, iris->vregs);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(qcom_iris_enable);
+
+void qcom_iris_disable(struct qcom_iris *iris)
+{
+ clk_disable_unprepare(iris->xo_clk);
+ regulator_bulk_disable(iris->num_vregs, iris->vregs);
+}
+EXPORT_SYMBOL_GPL(qcom_iris_disable);
+
+static int qcom_iris_probe(struct platform_device *pdev)
+{
+ const struct iris_data *data;
+ struct qcom_wcnss *wcnss;
+ struct qcom_iris *iris;
+ int ret;
+ int i;
+
+ iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL);
+ if (!iris)
+ return -ENOMEM;
+
+ data = of_device_get_match_data(&pdev->dev);
+ wcnss = dev_get_drvdata(pdev->dev.parent);
+
+ iris->xo_clk = devm_clk_get(&pdev->dev, "xo");
+ if (IS_ERR(iris->xo_clk)) {
+ if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "failed to acquire xo clk\n");
+ return PTR_ERR(iris->xo_clk);
+ }
+
+ iris->num_vregs = data->num_vregs;
+ iris->vregs = devm_kcalloc(&pdev->dev,
+ iris->num_vregs,
+ sizeof(struct regulator_bulk_data),
+ GFP_KERNEL);
+ if (!iris->vregs)
+ return -ENOMEM;
+
+ for (i = 0; i < iris->num_vregs; i++)
+ iris->vregs[i].supply = data->vregs[i].name;
+
+ ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get regulators\n");
+ return ret;
+ }
+
+ for (i = 0; i < iris->num_vregs; i++) {
+ if (data->vregs[i].max_voltage)
+ regulator_set_voltage(iris->vregs[i].consumer,
+ data->vregs[i].min_voltage,
+ data->vregs[i].max_voltage);
+
+ if (data->vregs[i].load_uA)
+ regulator_set_load(iris->vregs[i].consumer,
+ data->vregs[i].load_uA);
+ }
+
+ qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo);
+
+ return 0;
+}
+
+static int qcom_iris_remove(struct platform_device *pdev)
+{
+ struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent);
+
+ qcom_wcnss_assign_iris(wcnss, NULL, false);
+
+ return 0;
+}
+
+static const struct of_device_id iris_of_match[] = {
+ { .compatible = "qcom,wcn3620", .data = &wcn3620_data },
+ { .compatible = "qcom,wcn3660", .data = &wcn3660_data },
+ { .compatible = "qcom,wcn3680", .data = &wcn3680_data },
+ {}
+};
+
+static struct platform_driver wcnss_driver = {
+ .probe = qcom_iris_probe,
+ .remove = qcom_iris_remove,
+ .driver = {
+ .name = "qcom-iris",
+ .of_match_table = iris_of_match,
+ },
+};
+
+module_platform_driver(wcnss_driver);
+MODULE_DESCRIPTION("Qualcomm Wireless Subsystem Iris driver");
+MODULE_LICENSE("GPL v2");