// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2019, Linaro Ltd */ #include <linux/clk-provider.h> #include <linux/debugfs.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/mailbox_client.h> #include <linux/module.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/thermal.h> #include <linux/slab.h> #include <linux/soc/qcom/qcom_aoss.h> #define CREATE_TRACE_POINTS #include "trace-aoss.h" #define QMP_DESC_MAGIC … #define QMP_DESC_VERSION … #define QMP_DESC_FEATURES … /* AOP-side offsets */ #define QMP_DESC_UCORE_LINK_STATE … #define QMP_DESC_UCORE_LINK_STATE_ACK … #define QMP_DESC_UCORE_CH_STATE … #define QMP_DESC_UCORE_CH_STATE_ACK … #define QMP_DESC_UCORE_MBOX_SIZE … #define QMP_DESC_UCORE_MBOX_OFFSET … /* Linux-side offsets */ #define QMP_DESC_MCORE_LINK_STATE … #define QMP_DESC_MCORE_LINK_STATE_ACK … #define QMP_DESC_MCORE_CH_STATE … #define QMP_DESC_MCORE_CH_STATE_ACK … #define QMP_DESC_MCORE_MBOX_SIZE … #define QMP_DESC_MCORE_MBOX_OFFSET … #define QMP_STATE_UP … #define QMP_STATE_DOWN … #define QMP_MAGIC … #define QMP_VERSION … /* 64 bytes is enough to store the requests and provides padding to 4 bytes */ #define QMP_MSG_LEN … #define QMP_NUM_COOLING_RESOURCES … #define QMP_DEBUGFS_FILES … static bool qmp_cdev_max_state = …; struct qmp_cooling_device { … }; /** * struct qmp - driver state for QMP implementation * @msgram: iomem referencing the message RAM used for communication * @dev: reference to QMP device * @mbox_client: mailbox client used to ring the doorbell on transmit * @mbox_chan: mailbox channel used to ring the doorbell on transmit * @offset: offset within @msgram where messages should be written * @size: maximum size of the messages to be transmitted * @event: wait_queue for synchronization with the IRQ * @tx_lock: provides synchronization between multiple callers of qmp_send() * @qdss_clk: QDSS clock hw struct * @cooling_devs: thermal cooling devices * @debugfs_root: directory for the developer/tester interface * @debugfs_files: array of individual debugfs entries under debugfs_root */ struct qmp { … }; static void qmp_kick(struct qmp *qmp) { … } static bool qmp_magic_valid(struct qmp *qmp) { … } static bool qmp_link_acked(struct qmp *qmp) { … } static bool qmp_mcore_channel_acked(struct qmp *qmp) { … } static bool qmp_ucore_channel_up(struct qmp *qmp) { … } static int qmp_open(struct qmp *qmp) { … } static void qmp_close(struct qmp *qmp) { … } static irqreturn_t qmp_intr(int irq, void *data) { … } static bool qmp_message_empty(struct qmp *qmp) { … } /** * qmp_send() - send a message to the AOSS * @qmp: qmp context * @fmt: format string for message to be sent * @...: arguments for the format string * * Transmit message to AOSS and wait for the AOSS to acknowledge the message. * data must not be longer than the mailbox size. Access is synchronized by * this implementation. * * Return: 0 on success, negative errno on failure */ int __printf(2, 3) qmp_send(struct qmp *qmp, const char *fmt, ...) { … } EXPORT_SYMBOL_GPL(…); static int qmp_qdss_clk_prepare(struct clk_hw *hw) { … } static void qmp_qdss_clk_unprepare(struct clk_hw *hw) { … } static const struct clk_ops qmp_qdss_clk_ops = …; static int qmp_qdss_clk_add(struct qmp *qmp) { … } static void qmp_qdss_clk_remove(struct qmp *qmp) { … } static int qmp_cdev_get_max_state(struct thermal_cooling_device *cdev, unsigned long *state) { … } static int qmp_cdev_get_cur_state(struct thermal_cooling_device *cdev, unsigned long *state) { … } static int qmp_cdev_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) { … } static const struct thermal_cooling_device_ops qmp_cooling_device_ops = …; static int qmp_cooling_device_add(struct qmp *qmp, struct qmp_cooling_device *qmp_cdev, struct device_node *node) { … } static int qmp_cooling_devices_register(struct qmp *qmp) { … } static void qmp_cooling_devices_remove(struct qmp *qmp) { … } /** * qmp_get() - get a qmp handle from a device * @dev: client device pointer * * Return: handle to qmp device on success, ERR_PTR() on failure */ struct qmp *qmp_get(struct device *dev) { … } EXPORT_SYMBOL_GPL(…); /** * qmp_put() - release a qmp handle * @qmp: qmp handle obtained from qmp_get() */ void qmp_put(struct qmp *qmp) { … } EXPORT_SYMBOL_GPL(…); struct qmp_debugfs_entry { … }; static const struct qmp_debugfs_entry qmp_debugfs_entries[QMP_DEBUGFS_FILES] = …; static ssize_t qmp_debugfs_write(struct file *file, const char __user *user_buf, size_t count, loff_t *pos) { … } static const struct file_operations qmp_debugfs_fops = …; static void qmp_debugfs_create(struct qmp *qmp) { … } static int qmp_probe(struct platform_device *pdev) { … } static void qmp_remove(struct platform_device *pdev) { … } static const struct of_device_id qmp_dt_match[] = …; MODULE_DEVICE_TABLE(of, qmp_dt_match); static struct platform_driver qmp_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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