[PATCH] drivers/char: Remove msm_smd_pkt driver

[Stephen Boyd]

This code is no longer used now that mach-msm has been removed.
Delete it.

Cc: David Brown <davidb@xxxxxxxxxxxxxx>
Cc: Bryan Huntsman <bryanh@xxxxxxxxxxxxxx>
Cc: Daniel Walker <dwalker@xxxxxxxxxx>
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
---
 drivers/char/Kconfig       |   8 -
 drivers/char/Makefile      |   1 -
 drivers/char/msm_smd_pkt.c | 465 ---------------------------------------------
 3 files changed, 474 deletions(-)
 delete mode 100644 drivers/char/msm_smd_pkt.c

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index a4af8221751e..a043107da2af 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -590,14 +590,6 @@ config DEVPORT
 
 source "drivers/s390/char/Kconfig"
 
-config MSM_SMD_PKT
-	bool "Enable device interface for some SMD packet ports"
-	default n
-	depends on MSM_SMD
-	help
-	  Enables userspace clients to read and write to some packet SMD
-	  ports via device interface for MSM chipset.
-
 config TILE_SROM
 	bool "Character-device access via hypervisor to the Tilera SPI ROM"
 	depends on TILE
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index d06cde26031b..76cdfaa07cd5 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -9,7 +9,6 @@ obj-$(CONFIG_ATARI_DSP56K)	+= dsp56k.o
 obj-$(CONFIG_VIRTIO_CONSOLE)	+= virtio_console.o
 obj-$(CONFIG_RAW_DRIVER)	+= raw.o
 obj-$(CONFIG_SGI_SNSC)		+= snsc.o snsc_event.o
-obj-$(CONFIG_MSM_SMD_PKT)	+= msm_smd_pkt.o
 obj-$(CONFIG_MSPEC)		+= mspec.o
 obj-$(CONFIG_MMTIMER)		+= mmtimer.o
 obj-$(CONFIG_UV_MMTIMER)	+= uv_mmtimer.o
diff --git a/drivers/char/msm_smd_pkt.c b/drivers/char/msm_smd_pkt.c
deleted file mode 100644
index ba82a06d9684..000000000000
--- a/drivers/char/msm_smd_pkt.c
+++ /dev/null
@@ -1,465 +0,0 @@
-/* Copyright (c) 2008-2010, Code Aurora Forum. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- */
-/*
- * SMD Packet Driver -- Provides userspace interface to SMD packet ports.
- */
-
-#include <linux/slab.h>
-#include <linux/cdev.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/device.h>
-#include <linux/sched.h>
-#include <linux/mutex.h>
-#include <linux/delay.h>
-#include <linux/uaccess.h>
-#include <linux/workqueue.h>
-#include <linux/poll.h>
-
-#include <mach/msm_smd.h>
-
-#define NUM_SMD_PKT_PORTS 9
-#define DEVICE_NAME "smdpkt"
-#define MAX_BUF_SIZE 2048
-
-struct smd_pkt_dev {
-	struct cdev cdev;
-	struct device *devicep;
-
-	struct smd_channel *ch;
-	int open_count;
-	struct mutex ch_lock;
-	struct mutex rx_lock;
-	struct mutex tx_lock;
-	wait_queue_head_t ch_read_wait_queue;
-	wait_queue_head_t ch_opened_wait_queue;
-
-	int i;
-
-	unsigned char tx_buf[MAX_BUF_SIZE];
-	unsigned char rx_buf[MAX_BUF_SIZE];
-	int remote_open;
-
-} *smd_pkt_devp[NUM_SMD_PKT_PORTS];
-
-struct class *smd_pkt_classp;
-static dev_t smd_pkt_number;
-
-static int msm_smd_pkt_debug_enable;
-module_param_named(debug_enable, msm_smd_pkt_debug_enable,
-		   int, S_IRUGO | S_IWUSR | S_IWGRP);
-
-#ifdef DEBUG
-#define D_DUMP_BUFFER(prestr, cnt, buf) do {			\
-		int i;						\
-		if (msm_smd_pkt_debug_enable) {			\
-			pr_debug("%s", prestr);			\
-			for (i = 0; i < cnt; i++)		\
-				pr_debug("%.2x", buf[i]);	\
-			pr_debug("\n");				\
-		}						\
-	} while (0)
-#else
-#define D_DUMP_BUFFER(prestr, cnt, buf) do {} while (0)
-#endif
-
-#ifdef DEBUG
-#define DBG(x...) do {			\
-	if (msm_smd_pkt_debug_enable)	\
-		pr_debug(x);		\
-	} while (0)
-#else
-#define DBG(x...) do {} while (0)
-#endif
-
-static void check_and_wakeup_reader(struct smd_pkt_dev *smd_pkt_devp)
-{
-	int sz;
-
-	if (!smd_pkt_devp || !smd_pkt_devp->ch)
-		return;
-
-	sz = smd_cur_packet_size(smd_pkt_devp->ch);
-	if (sz == 0) {
-		DBG("no packet\n");
-		return;
-	}
-	if (sz > smd_read_avail(smd_pkt_devp->ch)) {
-		DBG("incomplete packet\n");
-		return;
-	}
-
-	DBG("waking up reader\n");
-	wake_up_interruptible(&smd_pkt_devp->ch_read_wait_queue);
-}
-
-static int smd_pkt_read(struct file *file, char __user *buf,
-			size_t count, loff_t *ppos)
-{
-	int r, bytes_read;
-	struct smd_pkt_dev *smd_pkt_devp;
-	struct smd_channel *chl;
-
-	DBG("read %d bytes\n", count);
-	if (count > MAX_BUF_SIZE)
-		return -EINVAL;
-
-	smd_pkt_devp = file->private_data;
-	if (!smd_pkt_devp || !smd_pkt_devp->ch)
-		return -EINVAL;
-
-	chl = smd_pkt_devp->ch;
-wait_for_packet:
-	r = wait_event_interruptible(smd_pkt_devp->ch_read_wait_queue,
-				     (smd_cur_packet_size(chl) > 0 &&
-				      smd_read_avail(chl) >=
-				      smd_cur_packet_size(chl)));
-
-	if (r < 0) {
-		if (r != -ERESTARTSYS)
-			pr_err("wait returned %d\n", r);
-		return r;
-	}
-
-	mutex_lock(&smd_pkt_devp->rx_lock);
-
-	bytes_read = smd_cur_packet_size(smd_pkt_devp->ch);
-	if (bytes_read == 0 ||
-	    bytes_read < smd_read_avail(smd_pkt_devp->ch)) {
-		mutex_unlock(&smd_pkt_devp->rx_lock);
-		DBG("Nothing to read\n");
-		goto wait_for_packet;
-	}
-
-	if (bytes_read > count) {
-		mutex_unlock(&smd_pkt_devp->rx_lock);
-		pr_info("packet size %d > buffer size %d", bytes_read, count);
-		return -EINVAL;
-	}
-
-	r = smd_read(smd_pkt_devp->ch, smd_pkt_devp->rx_buf, bytes_read);
-	if (r != bytes_read) {
-		mutex_unlock(&smd_pkt_devp->rx_lock);
-		pr_err("smd_read failed to read %d bytes: %d\n", bytes_read, r);
-		return -EIO;
-	}
-
-	D_DUMP_BUFFER("read: ", bytes_read, smd_pkt_devp->rx_buf);
-	r = copy_to_user(buf, smd_pkt_devp->rx_buf, bytes_read);
-	mutex_unlock(&smd_pkt_devp->rx_lock);
-	if (r) {
-		pr_err("copy_to_user failed %d\n", r);
-		return -EFAULT;
-	}
-
-	DBG("read complete %d bytes\n", bytes_read);
-	check_and_wakeup_reader(smd_pkt_devp);
-
-	return bytes_read;
-}
-
-static int smd_pkt_write(struct file *file, const char __user *buf,
-			 size_t count, loff_t *ppos)
-{
-	int r;
-	struct smd_pkt_dev *smd_pkt_devp;
-
-	if (count > MAX_BUF_SIZE)
-		return -EINVAL;
-
-	DBG("writing %d bytes\n", count);
-
-	smd_pkt_devp = file->private_data;
-	if (!smd_pkt_devp || !smd_pkt_devp->ch)
-		return -EINVAL;
-
-	mutex_lock(&smd_pkt_devp->tx_lock);
-	if (smd_write_avail(smd_pkt_devp->ch) < count) {
-		mutex_unlock(&smd_pkt_devp->tx_lock);
-		DBG("Not enough space to write\n");
-		return -ENOMEM;
-	}
-
-	D_DUMP_BUFFER("write: ", count, buf);
-	r = copy_from_user(smd_pkt_devp->tx_buf, buf, count);
-	if (r) {
-		mutex_unlock(&smd_pkt_devp->tx_lock);
-		pr_err("copy_from_user failed %d\n", r);
-		return -EFAULT;
-	}
-
-	r = smd_write(smd_pkt_devp->ch, smd_pkt_devp->tx_buf, count);
-	if (r != count) {
-		mutex_unlock(&smd_pkt_devp->tx_lock);
-		pr_err("smd_write failed to write %d bytes: %d.\n", count, r);
-		return -EIO;
-	}
-	mutex_unlock(&smd_pkt_devp->tx_lock);
-
-	DBG("wrote %d bytes\n", count);
-	return count;
-}
-
-static unsigned int smd_pkt_poll(struct file *file, poll_table *wait)
-{
-	struct smd_pkt_dev *smd_pkt_devp;
-	unsigned int mask = 0;
-
-	smd_pkt_devp = file->private_data;
-	if (!smd_pkt_devp)
-		return POLLERR;
-
-	DBG("poll waiting\n");
-	poll_wait(file, &smd_pkt_devp->ch_read_wait_queue, wait);
-	if (smd_read_avail(smd_pkt_devp->ch))
-		mask |= POLLIN | POLLRDNORM;
-
-	DBG("poll return\n");
-	return mask;
-}
-
-static void smd_pkt_ch_notify(void *priv, unsigned event)
-{
-	struct smd_pkt_dev *smd_pkt_devp = priv;
-
-	if (smd_pkt_devp->ch == 0)
-		return;
-
-	switch (event) {
-	case SMD_EVENT_DATA:
-		DBG("data\n");
-		check_and_wakeup_reader(smd_pkt_devp);
-		break;
-
-	case SMD_EVENT_OPEN:
-		DBG("remote open\n");
-		smd_pkt_devp->remote_open = 1;
-		wake_up_interruptible(&smd_pkt_devp->ch_opened_wait_queue);
-		break;
-
-	case SMD_EVENT_CLOSE:
-		smd_pkt_devp->remote_open = 0;
-		pr_info("remote closed\n");
-		break;
-
-	default:
-		pr_err("unknown event %d\n", event);
-		break;
-	}
-}
-
-static char *smd_pkt_dev_name[] = {
-	"smdcntl0",
-	"smdcntl1",
-	"smdcntl2",
-	"smdcntl3",
-	"smdcntl4",
-	"smdcntl5",
-	"smdcntl6",
-	"smdcntl7",
-	"smd22",
-};
-
-static char *smd_ch_name[] = {
-	"DATA5_CNTL",
-	"DATA6_CNTL",
-	"DATA7_CNTL",
-	"DATA8_CNTL",
-	"DATA9_CNTL",
-	"DATA12_CNTL",
-	"DATA13_CNTL",
-	"DATA14_CNTL",
-	"DATA22",
-};
-
-static int smd_pkt_open(struct inode *inode, struct file *file)
-{
-	int r = 0;
-	struct smd_pkt_dev *smd_pkt_devp;
-
-	smd_pkt_devp = container_of(inode->i_cdev, struct smd_pkt_dev, cdev);
-	if (!smd_pkt_devp)
-		return -EINVAL;
-
-	file->private_data = smd_pkt_devp;
-
-	mutex_lock(&smd_pkt_devp->ch_lock);
-	if (smd_pkt_devp->open_count == 0) {
-		r = smd_open(smd_ch_name[smd_pkt_devp->i],
-			     &smd_pkt_devp->ch, smd_pkt_devp,
-			     smd_pkt_ch_notify);
-		if (r < 0) {
-			pr_err("smd_open failed for %s, %d\n",
-			       smd_ch_name[smd_pkt_devp->i], r);
-			goto out;
-		}
-
-		r = wait_event_interruptible_timeout(
-				smd_pkt_devp->ch_opened_wait_queue,
-				smd_pkt_devp->remote_open,
-				msecs_to_jiffies(2 * HZ));
-		if (r == 0)
-			r = -ETIMEDOUT;
-
-		if (r < 0) {
-			pr_err("wait returned %d\n", r);
-			smd_close(smd_pkt_devp->ch);
-			smd_pkt_devp->ch = 0;
-		} else {
-			smd_pkt_devp->open_count++;
-			r = 0;
-		}
-	}
-out:
-	mutex_unlock(&smd_pkt_devp->ch_lock);
-	return r;
-}
-
-static int smd_pkt_release(struct inode *inode, struct file *file)
-{
-	int r = 0;
-	struct smd_pkt_dev *smd_pkt_devp = file->private_data;
-
-	if (!smd_pkt_devp)
-		return -EINVAL;
-
-	mutex_lock(&smd_pkt_devp->ch_lock);
-	if (--smd_pkt_devp->open_count == 0) {
-		r = smd_close(smd_pkt_devp->ch);
-		smd_pkt_devp->ch = 0;
-	}
-	mutex_unlock(&smd_pkt_devp->ch_lock);
-
-	return r;
-}
-
-static const struct file_operations smd_pkt_fops = {
-	.owner = THIS_MODULE,
-	.open = smd_pkt_open,
-	.release = smd_pkt_release,
-	.read = smd_pkt_read,
-	.write = smd_pkt_write,
-	.poll = smd_pkt_poll,
-};
-
-static int __init smd_pkt_init(void)
-{
-	int i;
-	int r;
-
-	r = alloc_chrdev_region(&smd_pkt_number, 0,
-				NUM_SMD_PKT_PORTS, DEVICE_NAME);
-	if (r) {
-		pr_err("alloc_chrdev_region() failed %d\n", r);
-		return r;
-	}
-
-	smd_pkt_classp = class_create(THIS_MODULE, DEVICE_NAME);
-	if (IS_ERR(smd_pkt_classp)) {
-		r = PTR_ERR(smd_pkt_classp);
-		pr_err("class_create() failed %d\n", r);
-		goto unreg_chardev;
-	}
-
-	for (i = 0; i < NUM_SMD_PKT_PORTS; ++i) {
-		smd_pkt_devp[i] = kzalloc(sizeof(struct smd_pkt_dev),
-					  GFP_KERNEL);
-		if (!smd_pkt_devp[i]) {
-			pr_err("kmalloc() failed\n");
-			goto clean_cdevs;
-		}
-
-		smd_pkt_devp[i]->i = i;
-
-		init_waitqueue_head(&smd_pkt_devp[i]->ch_read_wait_queue);
-		smd_pkt_devp[i]->remote_open = 0;
-		init_waitqueue_head(&smd_pkt_devp[i]->ch_opened_wait_queue);
-
-		mutex_init(&smd_pkt_devp[i]->ch_lock);
-		mutex_init(&smd_pkt_devp[i]->rx_lock);
-		mutex_init(&smd_pkt_devp[i]->tx_lock);
-
-		cdev_init(&smd_pkt_devp[i]->cdev, &smd_pkt_fops);
-		smd_pkt_devp[i]->cdev.owner = THIS_MODULE;
-
-		r = cdev_add(&smd_pkt_devp[i]->cdev,
-			     (smd_pkt_number + i), 1);
-		if (r) {
-			pr_err("cdev_add() failed %d\n", r);
-			kfree(smd_pkt_devp[i]);
-			goto clean_cdevs;
-		}
-
-		smd_pkt_devp[i]->devicep =
-			device_create(smd_pkt_classp, NULL,
-				      (smd_pkt_number + i), NULL,
-				      smd_pkt_dev_name[i]);
-		if (IS_ERR(smd_pkt_devp[i]->devicep)) {
-			r = PTR_ERR(smd_pkt_devp[i]->devicep);
-			pr_err("device_create() failed %d\n", r);
-			cdev_del(&smd_pkt_devp[i]->cdev);
-			kfree(smd_pkt_devp[i]);
-			goto clean_cdevs;
-		}
-
-	}
-
-	pr_info("SMD Packet Port Driver Initialized.\n");
-	return 0;
-
-clean_cdevs:
-	if (i > 0) {
-		while (--i >= 0) {
-			mutex_destroy(&smd_pkt_devp[i]->ch_lock);
-			mutex_destroy(&smd_pkt_devp[i]->rx_lock);
-			mutex_destroy(&smd_pkt_devp[i]->tx_lock);
-			cdev_del(&smd_pkt_devp[i]->cdev);
-			kfree(smd_pkt_devp[i]);
-			device_destroy(smd_pkt_classp,
-				       MKDEV(MAJOR(smd_pkt_number), i));
-		}
-	}
-
-	class_destroy(smd_pkt_classp);
-unreg_chardev:
-	unregister_chrdev_region(MAJOR(smd_pkt_number), NUM_SMD_PKT_PORTS);
-	return r;
-}
-module_init(smd_pkt_init);
-
-static void __exit smd_pkt_cleanup(void)
-{
-	int i;
-
-	for (i = 0; i < NUM_SMD_PKT_PORTS; ++i) {
-		mutex_destroy(&smd_pkt_devp[i]->ch_lock);
-		mutex_destroy(&smd_pkt_devp[i]->rx_lock);
-		mutex_destroy(&smd_pkt_devp[i]->tx_lock);
-		cdev_del(&smd_pkt_devp[i]->cdev);
-		kfree(smd_pkt_devp[i]);
-		device_destroy(smd_pkt_classp,
-			       MKDEV(MAJOR(smd_pkt_number), i));
-	}
-
-	class_destroy(smd_pkt_classp);
-	unregister_chrdev_region(MAJOR(smd_pkt_number), NUM_SMD_PKT_PORTS);
-}
-module_exit(smd_pkt_cleanup);
-
-MODULE_DESCRIPTION("MSM Shared Memory Packet Port");
-MODULE_LICENSE("GPL v2");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

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