[linux-2.6-block.git] / drivers / mailbox / qcom-apcs-ipc-mailbox.c

// 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 = "qcom-apcs-msm8996-clk"
};

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) {
		struct device_node *np = of_get_child_by_name(pdev->dev.of_node,
							      "clock-controller");
		struct platform_device_info pdevinfo = {
			.parent = &pdev->dev,
			.name = apcs_data->clk_name,
			.id = PLATFORM_DEVID_AUTO,
			.fwnode = of_fwnode_handle(np) ?: pdev->dev.fwnode,
			.of_node_reused = !np,
		};

		apcs->clk = platform_device_register_full(&pdevinfo);
		of_node_put(np);
		if (IS_ERR(apcs->clk))
			dev_err(&pdev->dev, "failed to register APCS clk\n");
	}

	platform_set_drvdata(pdev, apcs);

	return 0;
}

static void 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);
}

/* .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,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,msm8994-apcs-kpss-global", .data = &msm8994_apcs_data },
	{ .compatible = "qcom,msm8996-apcs-hmss-global", .data = &msm8996_apcs_data },
	{ .compatible = "qcom,qcm2290-apcs-hmss-global", .data = &msm8994_apcs_data },
	{ .compatible = "qcom,sdm845-apss-shared", .data = &apps_shared_apcs_data },
	{ .compatible = "qcom,sdx55-apcs-gcc", .data = &sdx55_apcs_data },
	/* Do not add any more entries using existing driver data */
	{ .compatible = "qcom,msm8976-apcs-kpss-global", .data = &msm8994_apcs_data },
	{ .compatible = "qcom,msm8998-apcs-hmss-global", .data = &msm8994_apcs_data },
	{ .compatible = "qcom,qcs404-apcs-apps-global", .data = &msm8916_apcs_data },
	{ .compatible = "qcom,sdm660-apcs-hmss-global", .data = &msm8994_apcs_data },
	{ .compatible = "qcom,sm4250-apcs-hmss-global", .data = &msm8994_apcs_data },
	{ .compatible = "qcom,sm6125-apcs-hmss-global", .data = &msm8994_apcs_data },
	{ .compatible = "qcom,sm6115-apcs-hmss-global", .data = &msm8994_apcs_data },
	{ .compatible = "qcom,ipq5332-apcs-apps-global", .data = &ipq6018_apcs_data },
	{ .compatible = "qcom,ipq5424-apcs-apps-global", .data = &msm8994_apcs_data },
	{ .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq6018_apcs_data },
	{ .compatible = "qcom,sc7180-apss-shared", .data = &apps_shared_apcs_data },
	{ .compatible = "qcom,sc8180x-apss-shared", .data = &apps_shared_apcs_data },
	{ .compatible = "qcom,sm8150-apss-shared", .data = &apps_shared_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");
Commit	Line	Data
97fb5e8d	1	// SPDX-License-Identifier: GPL-2.0-only
25bfee16 BA	2	/*
25bfee16 BA	3	* Copyright (c) 2017, Linaro Ltd
25bfee16 BA	4	*/
	5
	6	#include <linux/kernel.h>
	7	#include <linux/module.h>
	8	#include <linux/io.h>
	9	#include <linux/slab.h>
	10	#include <linux/of.h>
	11	#include <linux/of_platform.h>
	12	#include <linux/platform_device.h>
c6a8b171	13	#include <linux/regmap.h>
25bfee16 BA	14	#include <linux/mailbox_controller.h>
	15
	16	#define QCOM_APCS_IPC_BITS 32
	17
	18	struct qcom_apcs_ipc {
	19	struct mbox_controller mbox;
	20	struct mbox_chan mbox_chans[QCOM_APCS_IPC_BITS];
	21
c6a8b171	22	struct regmap *regmap;
25bfee16	23	unsigned long offset;
c815d769	24	struct platform_device *clk;
25bfee16 BA	25	};
25bfee16 BA	26
9b007938 SM	27	struct qcom_apcs_ipc_data {
	28	int offset;
	29	char *clk_name;
	30	};
	31
e9f901dc SM	32	static const struct qcom_apcs_ipc_data ipq6018_apcs_data = {
	33	.offset = 8, .clk_name = "qcom,apss-ipq6018-clk"
	34	};
	35
9b007938 SM	36	static const struct qcom_apcs_ipc_data msm8916_apcs_data = {
	37	.offset = 8, .clk_name = "qcom-apcs-msm8916-clk"
	38	};
	39
dde68056 KD	40	static const struct qcom_apcs_ipc_data msm8994_apcs_data = {
	41	.offset = 8, .clk_name = NULL
	42	};
	43
9b007938	44	static const struct qcom_apcs_ipc_data msm8996_apcs_data = {
adb239f3	45	.offset = 16, .clk_name = "qcom-apcs-msm8996-clk"
9b007938 SM	46	};
9b007938 SM	47
9b007938 SM	48	static const struct qcom_apcs_ipc_data apps_shared_apcs_data = {
	49	.offset = 12, .clk_name = NULL
	50	};
	51
c319f78c MS	52	static const struct qcom_apcs_ipc_data sdx55_apcs_data = {
	53	.offset = 0x1008, .clk_name = "qcom-sdx55-acps-clk"
	54	};
	55
c6a8b171 GD	56	static const struct regmap_config apcs_regmap_config = {
	57	.reg_bits = 32,
	58	.reg_stride = 4,
	59	.val_bits = 32,
c319f78c	60	.max_register = 0x1008,
c6a8b171 GD	61	.fast_io = true,
	62	};
	63
25bfee16 BA	64	static int qcom_apcs_ipc_send_data(struct mbox_chan chan, void data)
	65	{
	66	struct qcom_apcs_ipc *apcs = container_of(chan->mbox,
	67	struct qcom_apcs_ipc, mbox);
	68	unsigned long idx = (unsigned long)chan->con_priv;
	69
c6a8b171	70	return regmap_write(apcs->regmap, apcs->offset, BIT(idx));
25bfee16 BA	71	}
	72
	73	static const struct mbox_chan_ops qcom_apcs_ipc_ops = {
	74	.send_data = qcom_apcs_ipc_send_data,
	75	};
	76
	77	static int qcom_apcs_ipc_probe(struct platform_device *pdev)
	78	{
	79	struct qcom_apcs_ipc *apcs;
9b007938	80	const struct qcom_apcs_ipc_data *apcs_data;
c6a8b171	81	struct regmap *regmap;
25bfee16 BA	82	void __iomem *base;
	83	unsigned long i;
	84	int ret;
	85
	86	apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL);
	87	if (!apcs)
	88	return -ENOMEM;
	89
78c6798c	90	base = devm_platform_ioremap_resource(pdev, 0);
25bfee16 BA	91	if (IS_ERR(base))
	92	return PTR_ERR(base);
	93
c6a8b171 GD	94	regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config);
	95	if (IS_ERR(regmap))
	96	return PTR_ERR(regmap);
	97
9b007938	98	apcs_data = of_device_get_match_data(&pdev->dev);
25bfee16	99
c6a8b171	100	apcs->regmap = regmap;
9b007938	101	apcs->offset = apcs_data->offset;
25bfee16 BA	102
	103	/* Initialize channel identifiers */
	104	for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++)
	105	apcs->mbox_chans[i].con_priv = (void *)i;
	106
	107	apcs->mbox.dev = &pdev->dev;
	108	apcs->mbox.ops = &qcom_apcs_ipc_ops;
	109	apcs->mbox.chans = apcs->mbox_chans;
	110	apcs->mbox.num_chans = ARRAY_SIZE(apcs->mbox_chans);
	111
83dd44a1	112	ret = devm_mbox_controller_register(&pdev->dev, &apcs->mbox);
25bfee16 BA	113	if (ret) {
	114	dev_err(&pdev->dev, "failed to register APCS IPC controller\n");
	115	return ret;
	116	}
	117
9b007938	118	if (apcs_data->clk_name) {
d0b497df SG	119	struct device_node *np = of_get_child_by_name(pdev->dev.of_node,
	120	"clock-controller");
	121	struct platform_device_info pdevinfo = {
	122	.parent = &pdev->dev,
	123	.name = apcs_data->clk_name,
	124	.id = PLATFORM_DEVID_AUTO,
	125	.fwnode = of_fwnode_handle(np) ?: pdev->dev.fwnode,
	126	.of_node_reused = !np,
	127	};
	128
	129	apcs->clk = platform_device_register_full(&pdevinfo);
	130	of_node_put(np);
c815d769 GD	131	if (IS_ERR(apcs->clk))
	132	dev_err(&pdev->dev, "failed to register APCS clk\n");
	133	}
	134
25bfee16 BA	135	platform_set_drvdata(pdev, apcs);
	136
	137	return 0;
	138	}
	139
ce42b93c	140	static void qcom_apcs_ipc_remove(struct platform_device *pdev)
25bfee16 BA	141	{
25bfee16 BA	142	struct qcom_apcs_ipc *apcs = platform_get_drvdata(pdev);
c815d769	143	struct platform_device *clk = apcs->clk;
25bfee16	144
c815d769	145	platform_device_unregister(clk);
25bfee16 BA	146	}
	147
	148	/* .data is the offset of the ipc register within the global block */
	149	static const struct of_device_id qcom_apcs_ipc_of_match[] = {
e9f901dc	150	{ .compatible = "qcom,ipq6018-apcs-apps-global", .data = &ipq6018_apcs_data },
9b007938	151	{ .compatible = "qcom,msm8916-apcs-kpss-global", .data = &msm8916_apcs_data },
8a7cdb10	152	{ .compatible = "qcom,msm8939-apcs-kpss-global", .data = &msm8916_apcs_data },
e5c11ee3	153	{ .compatible = "qcom,msm8953-apcs-kpss-global", .data = &msm8994_apcs_data },
dde68056	154	{ .compatible = "qcom,msm8994-apcs-kpss-global", .data = &msm8994_apcs_data },
9b007938	155	{ .compatible = "qcom,msm8996-apcs-hmss-global", .data = &msm8996_apcs_data },
db28a59e	156	{ .compatible = "qcom,qcm2290-apcs-hmss-global", .data = &msm8994_apcs_data },
a71c8424 KK	157	{ .compatible = "qcom,sdm845-apss-shared", .data = &apps_shared_apcs_data },
	158	{ .compatible = "qcom,sdx55-apcs-gcc", .data = &sdx55_apcs_data },
	159	/* Do not add any more entries using existing driver data */
	160	{ .compatible = "qcom,msm8976-apcs-kpss-global", .data = &msm8994_apcs_data },
	161	{ .compatible = "qcom,msm8998-apcs-hmss-global", .data = &msm8994_apcs_data },
9b007938	162	{ .compatible = "qcom,qcs404-apcs-apps-global", .data = &msm8916_apcs_data },
4523ec8b	163	{ .compatible = "qcom,sdm660-apcs-hmss-global", .data = &msm8994_apcs_data },
e2cb0eac	164	{ .compatible = "qcom,sm4250-apcs-hmss-global", .data = &msm8994_apcs_data },
4523ec8b	165	{ .compatible = "qcom,sm6125-apcs-hmss-global", .data = &msm8994_apcs_data },
4523ec8b	166	{ .compatible = "qcom,sm6115-apcs-hmss-global", .data = &msm8994_apcs_data },
e1722588	167	{ .compatible = "qcom,ipq5332-apcs-apps-global", .data = &ipq6018_apcs_data },
443a5cae	168	{ .compatible = "qcom,ipq5424-apcs-apps-global", .data = &msm8994_apcs_data },
e1722588 KK	169	{ .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq6018_apcs_data },
	170	{ .compatible = "qcom,sc7180-apss-shared", .data = &apps_shared_apcs_data },
	171	{ .compatible = "qcom,sc8180x-apss-shared", .data = &apps_shared_apcs_data },
	172	{ .compatible = "qcom,sm8150-apss-shared", .data = &apps_shared_apcs_data },
25bfee16 BA	173	{}
	174	};
	175	MODULE_DEVICE_TABLE(of, qcom_apcs_ipc_of_match);
	176
	177	static struct platform_driver qcom_apcs_ipc_driver = {
	178	.probe = qcom_apcs_ipc_probe,
81f939db	179	.remove = qcom_apcs_ipc_remove,
25bfee16 BA	180	.driver = {
	181	.name = "qcom_apcs_ipc",
	182	.of_match_table = qcom_apcs_ipc_of_match,
	183	},
	184	};
	185
	186	static int __init qcom_apcs_ipc_init(void)
	187	{
	188	return platform_driver_register(&qcom_apcs_ipc_driver);
	189	}
	190	postcore_initcall(qcom_apcs_ipc_init);
	191
	192	static void __exit qcom_apcs_ipc_exit(void)
	193	{
	194	platform_driver_unregister(&qcom_apcs_ipc_driver);
	195	}
	196	module_exit(qcom_apcs_ipc_exit);
	197
	198	MODULE_LICENSE("GPL v2");
	199	MODULE_DESCRIPTION("Qualcomm APCS IPC driver");