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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/mailbox/qcom-apcs-ipc-mailbox.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/mailbox/qcom-apcs-ipc-mailbox.c')
-rw-r--r--drivers/mailbox/qcom-apcs-ipc-mailbox.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/mailbox/qcom-apcs-ipc-mailbox.c b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
new file mode 100644
index 000000000..f1f0e87a7
--- /dev/null
+++ b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2017, Linaro Ltd
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/mailbox_controller.h>
+
+#define QCOM_APCS_IPC_BITS 32
+
+struct qcom_apcs_ipc {
+ struct mbox_controller mbox;
+ struct mbox_chan mbox_chans[QCOM_APCS_IPC_BITS];
+
+ struct regmap *regmap;
+ unsigned long offset;
+ struct platform_device *clk;
+};
+
+struct qcom_apcs_ipc_data {
+ int offset;
+ char *clk_name;
+};
+
+static const struct qcom_apcs_ipc_data ipq6018_apcs_data = {
+ .offset = 8, .clk_name = "qcom,apss-ipq6018-clk"
+};
+
+static const struct qcom_apcs_ipc_data msm8916_apcs_data = {
+ .offset = 8, .clk_name = "qcom-apcs-msm8916-clk"
+};
+
+static const struct qcom_apcs_ipc_data msm8994_apcs_data = {
+ .offset = 8, .clk_name = NULL
+};
+
+static const struct qcom_apcs_ipc_data msm8996_apcs_data = {
+ .offset = 16, .clk_name = NULL
+};
+
+static const struct qcom_apcs_ipc_data apps_shared_apcs_data = {
+ .offset = 12, .clk_name = NULL
+};
+
+static const struct qcom_apcs_ipc_data sdx55_apcs_data = {
+ .offset = 0x1008, .clk_name = "qcom-sdx55-acps-clk"
+};
+
+static const struct regmap_config apcs_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = 0x1008,
+ .fast_io = true,
+};
+
+static int qcom_apcs_ipc_send_data(struct mbox_chan *chan, void *data)
+{
+ struct qcom_apcs_ipc *apcs = container_of(chan->mbox,
+ struct qcom_apcs_ipc, mbox);
+ unsigned long idx = (unsigned long)chan->con_priv;
+
+ return regmap_write(apcs->regmap, apcs->offset, BIT(idx));
+}
+
+static const struct mbox_chan_ops qcom_apcs_ipc_ops = {
+ .send_data = qcom_apcs_ipc_send_data,
+};
+
+static int qcom_apcs_ipc_probe(struct platform_device *pdev)
+{
+ struct qcom_apcs_ipc *apcs;
+ const struct qcom_apcs_ipc_data *apcs_data;
+ struct regmap *regmap;
+ void __iomem *base;
+ unsigned long i;
+ int ret;
+
+ apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL);
+ if (!apcs)
+ return -ENOMEM;
+
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ apcs_data = of_device_get_match_data(&pdev->dev);
+
+ apcs->regmap = regmap;
+ apcs->offset = apcs_data->offset;
+
+ /* Initialize channel identifiers */
+ for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++)
+ apcs->mbox_chans[i].con_priv = (void *)i;
+
+ apcs->mbox.dev = &pdev->dev;
+ apcs->mbox.ops = &qcom_apcs_ipc_ops;
+ apcs->mbox.chans = apcs->mbox_chans;
+ apcs->mbox.num_chans = ARRAY_SIZE(apcs->mbox_chans);
+
+ ret = devm_mbox_controller_register(&pdev->dev, &apcs->mbox);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register APCS IPC controller\n");
+ return ret;
+ }
+
+ if (apcs_data->clk_name) {
+ apcs->clk = platform_device_register_data(&pdev->dev,
+ apcs_data->clk_name,
+ PLATFORM_DEVID_AUTO,
+ NULL, 0);
+ if (IS_ERR(apcs->clk))
+ dev_err(&pdev->dev, "failed to register APCS clk\n");
+ }
+
+ platform_set_drvdata(pdev, apcs);
+
+ return 0;
+}
+
+static int qcom_apcs_ipc_remove(struct platform_device *pdev)
+{
+ struct qcom_apcs_ipc *apcs = platform_get_drvdata(pdev);
+ struct platform_device *clk = apcs->clk;
+
+ platform_device_unregister(clk);
+
+ return 0;
+}
+
+/* .data is the offset of the ipc register within the global block */
+static const struct of_device_id qcom_apcs_ipc_of_match[] = {
+ { .compatible = "qcom,ipq6018-apcs-apps-global", .data = &ipq6018_apcs_data },
+ { .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq6018_apcs_data },
+ { .compatible = "qcom,msm8916-apcs-kpss-global", .data = &msm8916_apcs_data },
+ { .compatible = "qcom,msm8939-apcs-kpss-global", .data = &msm8916_apcs_data },
+ { .compatible = "qcom,msm8953-apcs-kpss-global", .data = &msm8994_apcs_data },
+ { .compatible = "qcom,msm8976-apcs-kpss-global", .data = &msm8994_apcs_data },
+ { .compatible = "qcom,msm8994-apcs-kpss-global", .data = &msm8994_apcs_data },
+ { .compatible = "qcom,msm8996-apcs-hmss-global", .data = &msm8996_apcs_data },
+ { .compatible = "qcom,msm8998-apcs-hmss-global", .data = &msm8994_apcs_data },
+ { .compatible = "qcom,qcm2290-apcs-hmss-global", .data = &msm8994_apcs_data },
+ { .compatible = "qcom,qcs404-apcs-apps-global", .data = &msm8916_apcs_data },
+ { .compatible = "qcom,sc7180-apss-shared", .data = &apps_shared_apcs_data },
+ { .compatible = "qcom,sc8180x-apss-shared", .data = &apps_shared_apcs_data },
+ { .compatible = "qcom,sdm660-apcs-hmss-global", .data = &msm8994_apcs_data },
+ { .compatible = "qcom,sdm845-apss-shared", .data = &apps_shared_apcs_data },
+ { .compatible = "qcom,sm6125-apcs-hmss-global", .data = &msm8994_apcs_data },
+ { .compatible = "qcom,sm8150-apss-shared", .data = &apps_shared_apcs_data },
+ { .compatible = "qcom,sm6115-apcs-hmss-global", .data = &msm8994_apcs_data },
+ { .compatible = "qcom,sdx55-apcs-gcc", .data = &sdx55_apcs_data },
+ {}
+};
+MODULE_DEVICE_TABLE(of, qcom_apcs_ipc_of_match);
+
+static struct platform_driver qcom_apcs_ipc_driver = {
+ .probe = qcom_apcs_ipc_probe,
+ .remove = qcom_apcs_ipc_remove,
+ .driver = {
+ .name = "qcom_apcs_ipc",
+ .of_match_table = qcom_apcs_ipc_of_match,
+ },
+};
+
+static int __init qcom_apcs_ipc_init(void)
+{
+ return platform_driver_register(&qcom_apcs_ipc_driver);
+}
+postcore_initcall(qcom_apcs_ipc_init);
+
+static void __exit qcom_apcs_ipc_exit(void)
+{
+ platform_driver_unregister(&qcom_apcs_ipc_driver);
+}
+module_exit(qcom_apcs_ipc_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Qualcomm APCS IPC driver");