diff options
| -rw-r--r-- | drivers/char/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/char/Makefile | 1 | ||||
| -rw-r--r-- | drivers/char/msm_smd_pkt.c | 465 |
3 files changed, 0 insertions, 474 deletions
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"); |