Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2015 ST Microelectronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Author: Lee Jones <lee.jones@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/mailbox_client.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define MBOX_MAX_SIG_LEN	8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define MBOX_MAX_MSG_LEN	128
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define MBOX_BYTES_PER_LINE	16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define MBOX_HEXDUMP_LINE_LEN	((MBOX_BYTES_PER_LINE * 4) + 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define MBOX_HEXDUMP_MAX_LEN	(MBOX_HEXDUMP_LINE_LEN *		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 				 (MBOX_MAX_MSG_LEN / MBOX_BYTES_PER_LINE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) static bool mbox_data_ready;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) struct mbox_test_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	struct device		*dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	void __iomem		*tx_mmio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	void __iomem		*rx_mmio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	struct mbox_chan	*tx_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	struct mbox_chan	*rx_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	char			*rx_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	char			*signal;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	char			*message;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	spinlock_t		lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	wait_queue_head_t	waitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	struct fasync_struct	*async_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	struct dentry		*root_debugfs_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) static ssize_t mbox_test_signal_write(struct file *filp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 				       const char __user *userbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 				       size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct mbox_test_device *tdev = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	if (!tdev->tx_channel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		dev_err(tdev->dev, "Channel cannot do Tx\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (count > MBOX_MAX_SIG_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		dev_err(tdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 			"Signal length %zd greater than max allowed %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 			count, MBOX_MAX_SIG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	/* Only allocate memory if we need to */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (!tdev->signal) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		tdev->signal = kzalloc(MBOX_MAX_SIG_LEN, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		if (!tdev->signal)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	if (copy_from_user(tdev->signal, userbuf, count)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		kfree(tdev->signal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		tdev->signal = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) static const struct file_operations mbox_test_signal_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	.write	= mbox_test_signal_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	.open	= simple_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	.llseek	= generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static int mbox_test_message_fasync(int fd, struct file *filp, int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	struct mbox_test_device *tdev = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	return fasync_helper(fd, filp, on, &tdev->async_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) static ssize_t mbox_test_message_write(struct file *filp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				       const char __user *userbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 				       size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct mbox_test_device *tdev = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	void *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	if (!tdev->tx_channel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		dev_err(tdev->dev, "Channel cannot do Tx\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	if (count > MBOX_MAX_MSG_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		dev_err(tdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 			"Message length %zd greater than max allowed %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 			count, MBOX_MAX_MSG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	tdev->message = kzalloc(MBOX_MAX_MSG_LEN, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	if (!tdev->message)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	ret = copy_from_user(tdev->message, userbuf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	 * A separate signal is only of use if there is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	 * MMIO to subsequently pass the message through
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	if (tdev->tx_mmio && tdev->signal) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		print_hex_dump_bytes("Client: Sending: Signal: ", DUMP_PREFIX_ADDRESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 				     tdev->signal, MBOX_MAX_SIG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		data = tdev->signal;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		data = tdev->message;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	print_hex_dump_bytes("Client: Sending: Message: ", DUMP_PREFIX_ADDRESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			     tdev->message, MBOX_MAX_MSG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	ret = mbox_send_message(tdev->tx_channel, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		dev_err(tdev->dev, "Failed to send message via mailbox\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	kfree(tdev->signal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	kfree(tdev->message);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	tdev->signal = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	return ret < 0 ? ret : count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static bool mbox_test_message_data_ready(struct mbox_test_device *tdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	bool data_ready;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	spin_lock_irqsave(&tdev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	data_ready = mbox_data_ready;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	spin_unlock_irqrestore(&tdev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	return data_ready;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static ssize_t mbox_test_message_read(struct file *filp, char __user *userbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 				      size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	struct mbox_test_device *tdev = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	char *touser, *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	int l = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	DECLARE_WAITQUEUE(wait, current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	touser = kzalloc(MBOX_HEXDUMP_MAX_LEN + 1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	if (!touser)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (!tdev->rx_channel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		ret = snprintf(touser, 20, "<NO RX CAPABILITY>\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		ret = simple_read_from_buffer(userbuf, count, ppos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 					      touser, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		goto kfree_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	add_wait_queue(&tdev->waitq, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		__set_current_state(TASK_INTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		if (mbox_test_message_data_ready(tdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		if (filp->f_flags & O_NONBLOCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			ret = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			goto waitq_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		if (signal_pending(current)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 			ret = -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 			goto waitq_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		schedule();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	} while (1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	spin_lock_irqsave(&tdev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	ptr = tdev->rx_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	while (l < MBOX_HEXDUMP_MAX_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		hex_dump_to_buffer(ptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 				   MBOX_BYTES_PER_LINE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 				   MBOX_BYTES_PER_LINE, 1, touser + l,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 				   MBOX_HEXDUMP_LINE_LEN, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		ptr += MBOX_BYTES_PER_LINE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		l += MBOX_HEXDUMP_LINE_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		*(touser + (l - 1)) = '\n';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	*(touser + l) = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	memset(tdev->rx_buffer, 0, MBOX_MAX_MSG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	mbox_data_ready = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	spin_unlock_irqrestore(&tdev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	ret = simple_read_from_buffer(userbuf, count, ppos, touser, MBOX_HEXDUMP_MAX_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) waitq_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	__set_current_state(TASK_RUNNING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	remove_wait_queue(&tdev->waitq, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) kfree_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	kfree(touser);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static __poll_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) mbox_test_message_poll(struct file *filp, struct poll_table_struct *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	struct mbox_test_device *tdev = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	poll_wait(filp, &tdev->waitq, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	if (mbox_test_message_data_ready(tdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		return EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static const struct file_operations mbox_test_message_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	.write	= mbox_test_message_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	.read	= mbox_test_message_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	.fasync	= mbox_test_message_fasync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	.poll	= mbox_test_message_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	.open	= simple_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	.llseek	= generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static int mbox_test_add_debugfs(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 				 struct mbox_test_device *tdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	if (!debugfs_initialized())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	tdev->root_debugfs_dir = debugfs_create_dir(dev_name(&pdev->dev), NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (!tdev->root_debugfs_dir) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		dev_err(&pdev->dev, "Failed to create Mailbox debugfs\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	debugfs_create_file("message", 0600, tdev->root_debugfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 			    tdev, &mbox_test_message_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	debugfs_create_file("signal", 0200, tdev->root_debugfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 			    tdev, &mbox_test_signal_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static void mbox_test_receive_message(struct mbox_client *client, void *message)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	struct mbox_test_device *tdev = dev_get_drvdata(client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	spin_lock_irqsave(&tdev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	if (tdev->rx_mmio) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		memcpy_fromio(tdev->rx_buffer, tdev->rx_mmio, MBOX_MAX_MSG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		print_hex_dump_bytes("Client: Received [MMIO]: ", DUMP_PREFIX_ADDRESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 				     tdev->rx_buffer, MBOX_MAX_MSG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	} else if (message) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		print_hex_dump_bytes("Client: Received [API]: ", DUMP_PREFIX_ADDRESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 				     message, MBOX_MAX_MSG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		memcpy(tdev->rx_buffer, message, MBOX_MAX_MSG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	mbox_data_ready = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	spin_unlock_irqrestore(&tdev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	wake_up_interruptible(&tdev->waitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	kill_fasync(&tdev->async_queue, SIGIO, POLL_IN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static void mbox_test_prepare_message(struct mbox_client *client, void *message)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	struct mbox_test_device *tdev = dev_get_drvdata(client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	if (tdev->tx_mmio) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		if (tdev->signal)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 			memcpy_toio(tdev->tx_mmio, tdev->message, MBOX_MAX_MSG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 			memcpy_toio(tdev->tx_mmio, message, MBOX_MAX_MSG_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) static void mbox_test_message_sent(struct mbox_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 				   void *message, int r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	if (r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		dev_warn(client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 			 "Client: Message could not be sent: %d\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		dev_info(client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 			 "Client: Message sent\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static struct mbox_chan *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) mbox_test_request_channel(struct platform_device *pdev, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	struct mbox_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	struct mbox_chan *channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	client = devm_kzalloc(&pdev->dev, sizeof(*client), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	if (!client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	client->dev		= &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	client->rx_callback	= mbox_test_receive_message;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	client->tx_prepare	= mbox_test_prepare_message;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	client->tx_done		= mbox_test_message_sent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	client->tx_block	= true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	client->knows_txdone	= false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	client->tx_tout		= 500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	channel = mbox_request_channel_byname(client, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	if (IS_ERR(channel)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		dev_warn(&pdev->dev, "Failed to request %s channel\n", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	return channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) static int mbox_test_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	struct mbox_test_device *tdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	resource_size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	tdev = devm_kzalloc(&pdev->dev, sizeof(*tdev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	if (!tdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	/* It's okay for MMIO to be NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	tdev->tx_mmio = devm_ioremap_resource(&pdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	if (PTR_ERR(tdev->tx_mmio) == -EBUSY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 		/* if reserved area in SRAM, try just ioremap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		size = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		tdev->tx_mmio = devm_ioremap(&pdev->dev, res->start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	} else if (IS_ERR(tdev->tx_mmio)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		tdev->tx_mmio = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	/* If specified, second reg entry is Rx MMIO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	tdev->rx_mmio = devm_ioremap_resource(&pdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	if (PTR_ERR(tdev->rx_mmio) == -EBUSY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 		size = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 		tdev->rx_mmio = devm_ioremap(&pdev->dev, res->start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	} else if (IS_ERR(tdev->rx_mmio)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 		tdev->rx_mmio = tdev->tx_mmio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	tdev->tx_channel = mbox_test_request_channel(pdev, "tx");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	tdev->rx_channel = mbox_test_request_channel(pdev, "rx");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	if (!tdev->tx_channel && !tdev->rx_channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 		return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	/* If Rx is not specified but has Rx MMIO, then Rx = Tx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	if (!tdev->rx_channel && (tdev->rx_mmio != tdev->tx_mmio))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 		tdev->rx_channel = tdev->tx_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	tdev->dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	platform_set_drvdata(pdev, tdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	spin_lock_init(&tdev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	if (tdev->rx_channel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		tdev->rx_buffer = devm_kzalloc(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 					       MBOX_MAX_MSG_LEN, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 		if (!tdev->rx_buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	ret = mbox_test_add_debugfs(pdev, tdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	init_waitqueue_head(&tdev->waitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	dev_info(&pdev->dev, "Successfully registered\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) static int mbox_test_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	struct mbox_test_device *tdev = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	debugfs_remove_recursive(tdev->root_debugfs_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	if (tdev->tx_channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		mbox_free_channel(tdev->tx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	if (tdev->rx_channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		mbox_free_channel(tdev->rx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) static const struct of_device_id mbox_test_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	{ .compatible = "mailbox-test" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) MODULE_DEVICE_TABLE(of, mbox_test_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) static struct platform_driver mbox_test_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 		.name = "mailbox_test",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 		.of_match_table = mbox_test_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	.probe  = mbox_test_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	.remove = mbox_test_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) module_platform_driver(mbox_test_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) MODULE_DESCRIPTION("Generic Mailbox Testing Facility");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) MODULE_AUTHOR("Lee Jones <lee.jones@linaro.org");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) MODULE_LICENSE("GPL v2");