1 files changed, 0 insertions, 364 deletions

diff --git a/target/linux/layerscape/patches-5.4/701-net-0308-staging-fsl_ppfe-add-support-for-a-char-dev-for-link.patch b/target/linux/layerscape/patches-5.4/701-net-0308-staging-fsl_ppfe-add-support-for-a-char-dev-for-link.patch
deleted file mode 100644
index c445952222..0000000000
--- a/target/linux/layerscape/patches-5.4/701-net-0308-staging-fsl_ppfe-add-support-for-a-char-dev-for-link.patch
+++ /dev/null
@@ -1,364 +0,0 @@
-From a41d4af2ed4b02edca9d7f69955893d407274dc2 Mon Sep 17 00:00:00 2001
-From: Shreyansh Jain <shreyansh.jain@nxp.com>
-Date: Wed, 6 Jun 2018 14:19:34 +0530
-Subject: [PATCH] staging: fsl_ppfe: add support for a char dev for link status
-
-Read and IOCTL support is added. Application would need to open,
-read/ioctl the /dev/pfe_us_cdev device.
-select is pending as it requires a wait_queue.
-
-Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
-Signed-off-by: Calvin Johnson <calvin.johnson@nxp.com>
----
- drivers/staging/fsl_ppfe/Makefile   |   3 +-
- drivers/staging/fsl_ppfe/pfe_cdev.c | 207 ++++++++++++++++++++++++++++++++++++
- drivers/staging/fsl_ppfe/pfe_cdev.h |  52 +++++++++
- drivers/staging/fsl_ppfe/pfe_eth.c  |  14 +++
- drivers/staging/fsl_ppfe/pfe_mod.c  |  14 +++
- 5 files changed, 289 insertions(+), 1 deletion(-)
- create mode 100644 drivers/staging/fsl_ppfe/pfe_cdev.c
- create mode 100644 drivers/staging/fsl_ppfe/pfe_cdev.h
-
---- a/drivers/staging/fsl_ppfe/Makefile
-+++ b/drivers/staging/fsl_ppfe/Makefile
-@@ -16,4 +16,5 @@ pfe-y += pfe_mod.o \
- 	pfe_sysfs.o \
- 	pfe_debugfs.o \
- 	pfe_ls1012a_platform.o \
--	pfe_hal.o
-+	pfe_hal.o \
-+	pfe_cdev.o
---- /dev/null
-+++ b/drivers/staging/fsl_ppfe/pfe_cdev.c
-@@ -0,0 +1,207 @@
-+/*
-+ * Copyright 2018 NXP
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * 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.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-+ */
-+
-+/* @pfe_cdev.c.
-+ *  Dummy device representing the PFE US in userspace.
-+ *  - used for interacting with the kernel layer for link status
-+ */
-+
-+#include "pfe_cdev.h"
-+
-+static int pfe_majno;
-+static struct class *pfe_char_class;
-+static struct device *pfe_char_dev;
-+
-+struct pfe_shared_info link_states[PFE_CDEV_ETH_COUNT];
-+
-+static int pfe_cdev_open(struct inode *inp, struct file *fp)
-+{
-+	pr_debug("PFE CDEV device opened.\n");
-+	return 0;
-+}
-+
-+static ssize_t pfe_cdev_read(struct file *fp, char *buf,
-+			     size_t len, loff_t *off)
-+{
-+	int ret = 0;
-+
-+	pr_info("PFE CDEV attempt copying (%lu) size of user.\n",
-+		sizeof(link_states));
-+
-+	pr_debug("Dump link_state on screen before copy_to_user\n");
-+	for (; ret < PFE_CDEV_ETH_COUNT; ret++) {
-+		pr_debug("%u  %u", link_states[ret].phy_id,
-+			 link_states[ret].state);
-+		pr_debug("\n");
-+	}
-+
-+	/* Copy to user the value in buffer sized len */
-+	ret = copy_to_user(buf, &link_states, sizeof(link_states));
-+	if (ret != 0) {
-+		pr_err("Failed to send (%d)bytes of (%lu) requested.\n",
-+		       ret, len);
-+		return -EFAULT;
-+	}
-+
-+	/* offset set back to 0 as there is contextual reading offset */
-+	*off = 0;
-+	pr_debug("Read of (%lu) bytes performed.\n", sizeof(link_states));
-+
-+	return sizeof(link_states);
-+}
-+
-+/**
-+ * This function is for getting some commands from user through non-IOCTL
-+ * channel. It can used to configure the device.
-+ * TODO: To be filled in future, if require duplex communication with user
-+ * space.
-+ */
-+static ssize_t pfe_cdev_write(struct file *fp, const char *buf,
-+			      size_t len, loff_t *off)
-+{
-+	pr_info("PFE CDEV Write operation not supported!\n");
-+
-+	return -EFAULT;
-+}
-+
-+static int pfe_cdev_release(struct inode *inp, struct file *fp)
-+{
-+	pr_info("PFE_CDEV: Device successfully closed\n");
-+	return 0;
-+}
-+
-+static long pfe_cdev_ioctl(struct file *fp, unsigned int cmd,
-+			   unsigned long arg)
-+{
-+	int ret = -EFAULT;
-+	int __user *argp = (int __user *)arg;
-+
-+	pr_debug("PFE CDEV IOCTL Called with cmd=(%u)\n", cmd);
-+
-+	switch (cmd) {
-+	case PFE_CDEV_ETH0_STATE_GET:
-+		/* Return an unsigned int (link state) for ETH0 */
-+		*argp = link_states[0].state;
-+		pr_debug("Returning state=%d for ETH0\n", *argp);
-+		ret = 0;
-+		break;
-+	case PFE_CDEV_ETH1_STATE_GET:
-+		/* Return an unsigned int (link state) for ETH0 */
-+		*argp = link_states[1].state;
-+		pr_debug("Returning state=%d for ETH1\n", *argp);
-+		ret = 0;
-+		break;
-+	default:
-+		pr_info("Unsupport cmd (%d) for PFE CDEV.\n", cmd);
-+		break;
-+	};
-+
-+	return ret;
-+}
-+
-+static unsigned int pfe_cdev_poll(struct file *fp,
-+				  struct poll_table_struct *wait)
-+{
-+	pr_info("PFE CDEV poll method not supported\n");
-+	return 0;
-+}
-+
-+static const struct file_operations pfe_cdev_fops = {
-+	.open = pfe_cdev_open,
-+	.read = pfe_cdev_read,
-+	.write = pfe_cdev_write,
-+	.release = pfe_cdev_release,
-+	.unlocked_ioctl = pfe_cdev_ioctl,
-+	.poll = pfe_cdev_poll,
-+};
-+
-+int pfe_cdev_init(void)
-+{
-+	int ret;
-+
-+	pr_debug("PFE CDEV initialization begin\n");
-+
-+	/* Register the major number for the device */
-+	pfe_majno = register_chrdev(0, PFE_CDEV_NAME, &pfe_cdev_fops);
-+	if (pfe_majno < 0) {
-+		pr_err("Unable to register PFE CDEV. PFE CDEV not available\n");
-+		ret = pfe_majno;
-+		goto cleanup;
-+	}
-+
-+	pr_debug("PFE CDEV assigned major number: %d\n", pfe_majno);
-+
-+	/* Register the class for the device */
-+	pfe_char_class = class_create(THIS_MODULE, PFE_CLASS_NAME);
-+	if (IS_ERR(pfe_char_class)) {
-+		pr_err(
-+		"Failed to init class for PFE CDEV. PFE CDEV not available.\n");
-+		goto cleanup;
-+	}
-+
-+	pr_debug("PFE CDEV Class created successfully.\n");
-+
-+	/* Create the device without any parent and without any callback data */
-+	    pfe_char_dev = device_create(pfe_char_class, NULL,
-+					 MKDEV(pfe_majno, 0), NULL,
-+					 PFE_CDEV_NAME);
-+	if (IS_ERR(pfe_char_dev)) {
-+		pr_err("Unable to PFE CDEV device. PFE CDEV not available.\n");
-+		ret = PTR_ERR(pfe_char_dev);
-+		goto cleanup;
-+	}
-+
-+	/* Information structure being shared with the userspace */
-+	memset(link_states, 0, sizeof(struct pfe_shared_info) *
-+			PFE_CDEV_ETH_COUNT);
-+
-+	pr_info("PFE CDEV created: %s\n", PFE_CDEV_NAME);
-+
-+	ret = 0;
-+	return ret;
-+
-+cleanup:
-+	if (!IS_ERR(pfe_char_class))
-+		class_destroy(pfe_char_class);
-+
-+	if (pfe_majno > 0)
-+		unregister_chrdev(pfe_majno, PFE_CDEV_NAME);
-+
-+	ret = -EFAULT;
-+	return ret;
-+}
-+
-+void pfe_cdev_exit(void)
-+{
-+	if (!IS_ERR(pfe_char_dev))
-+		device_destroy(pfe_char_class, MKDEV(pfe_majno, 0));
-+
-+	if (!IS_ERR(pfe_char_class)) {
-+		class_unregister(pfe_char_class);
-+		class_destroy(pfe_char_class);
-+	}
-+
-+	if (pfe_majno > 0)
-+		unregister_chrdev(pfe_majno, PFE_CDEV_NAME);
-+
-+	/* reset the variables */
-+	pfe_majno = 0;
-+	pfe_char_class = NULL;
-+	pfe_char_dev = NULL;
-+
-+	pr_info("PFE CDEV Removed.\n");
-+}
---- /dev/null
-+++ b/drivers/staging/fsl_ppfe/pfe_cdev.h
-@@ -0,0 +1,52 @@
-+/*
-+ * Copyright 2018 NXP
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * 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.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-+ */
-+
-+#ifndef _PFE_CDEV_H_
-+#define _PFE_CDEV_H_
-+
-+#include <linux/init.h>
-+#include <linux/device.h>
-+#include <linux/err.h>
-+#include <linux/kernel.h>
-+#include <linux/fs.h>
-+#include <linux/uaccess.h>
-+#include <linux/poll.h>
-+
-+#define  PFE_CDEV_NAME "pfe_us_cdev"
-+#define  PFE_CLASS_NAME  "ppfe_us"
-+
-+/* Extracted from ls1012a_pfe_platform_data, there are 3 interfaces which are
-+ * supported by PFE driver. Should be updated if number of eth devices are
-+ * changed.
-+ */
-+#define PFE_CDEV_ETH_COUNT 3
-+
-+struct pfe_shared_info {
-+	uint32_t phy_id; /* Link phy ID */
-+	uint8_t state;  /* Has either 0 or 1 */
-+};
-+
-+extern struct pfe_shared_info link_states[PFE_CDEV_ETH_COUNT];
-+
-+/* IOCTL Commands */
-+#define PFE_CDEV_ETH0_STATE_GET	0
-+#define PFE_CDEV_ETH1_STATE_GET	1
-+
-+int pfe_cdev_init(void);
-+void pfe_cdev_exit(void);
-+
-+#endif /* _PFE_CDEV_H_ */
---- a/drivers/staging/fsl_ppfe/pfe_eth.c
-+++ b/drivers/staging/fsl_ppfe/pfe_eth.c
-@@ -55,6 +55,7 @@
- 
- #include "pfe_mod.h"
- #include "pfe_eth.h"
-+#include "pfe_cdev.h"
- 
- #define LS1012A_REV_1_0		0x87040010
- 
-@@ -1160,6 +1161,19 @@ static void pfe_eth_adjust_link(struct n
- 		phy_print_status(phydev);
- 
- 	spin_unlock_irqrestore(&priv->lock, flags);
-+
-+	/* Now, dump the details to the cdev.
-+	 * XXX: Locking would be required? (uniprocess arch)
-+	 *      Or, maybe move it in spinlock above
-+	 */
-+	if (us && priv->einfo->gem_id < PFE_CDEV_ETH_COUNT) {
-+		pr_debug("Changing link state from (%u) to (%u) for ID=(%u)\n",
-+			 link_states[priv->einfo->gem_id].state,
-+			 phydev->link,
-+			 priv->einfo->gem_id);
-+		link_states[priv->einfo->gem_id].phy_id = priv->einfo->gem_id;
-+		link_states[priv->einfo->gem_id].state = phydev->link;
-+	}
- }
- 
- /* pfe_phy_exit
---- a/drivers/staging/fsl_ppfe/pfe_mod.c
-+++ b/drivers/staging/fsl_ppfe/pfe_mod.c
-@@ -18,6 +18,7 @@
- 
- #include <linux/dma-mapping.h>
- #include "pfe_mod.h"
-+#include "pfe_cdev.h"
- 
- unsigned int us;
- module_param(us, uint, 0444);
-@@ -92,8 +93,18 @@ firmware_init:
- 	if (rc < 0)
- 		goto err_debugfs;
- 
-+	if (us) {
-+		/* Creating a character device */
-+		rc = pfe_cdev_init();
-+		if (rc < 0)
-+			goto err_cdev;
-+	}
-+
- 	return 0;
- 
-+err_cdev:
-+	pfe_debugfs_exit(pfe);
-+
- err_debugfs:
- 	pfe_sysfs_exit(pfe);
- 
-@@ -129,6 +140,9 @@ int pfe_remove(struct pfe *pfe)
- {
- 	pr_info("%s\n", __func__);
- 
-+	if (us)
-+		pfe_cdev_exit();
-+
- 	pfe_debugfs_exit(pfe);
- 
- 	pfe_sysfs_exit(pfe);