--- /dev/null
+/*
+ * Linux WiMAX
+ * Generic messaging interface between userspace and driver/device
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 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.
+ *
+ *
+ * This implements a direct communication channel between user space and
+ * the driver/device, by which free form messages can be sent back and
+ * forth.
+ *
+ * This is intended for device-specific features, vendor quirks, etc.
+ *
+ * See include/net/wimax.h
+ *
+ * GENERIC NETLINK ENCODING AND CAPACITY
+ *
+ * A destination "pipe name" is added to each message; it is up to the
+ * drivers to assign or use those names (if using them at all).
+ *
+ * Messages are encoded as a binary netlink attribute using nla_put()
+ * using type NLA_UNSPEC (as some versions of libnl still in
+ * deployment don't yet understand NLA_BINARY).
+ *
+ * The maximum capacity of this transport is PAGESIZE per message (so
+ * the actual payload will be bit smaller depending on the
+ * netlink/generic netlink attributes and headers).
+ *
+ * RECEPTION OF MESSAGES
+ *
+ * When a message is received from user space, it is passed verbatim
+ * to the driver calling wimax_dev->op_msg_from_user(). The return
+ * value from this function is passed back to user space as an ack
+ * over the generic netlink protocol.
+ *
+ * The stack doesn't do any processing or interpretation of these
+ * messages.
+ *
+ * SENDING MESSAGES
+ *
+ * Messages can be sent with wimax_msg().
+ *
+ * If the message delivery needs to happen on a different context to
+ * that of its creation, wimax_msg_alloc() can be used to get a
+ * pointer to the message that can be delivered later on with
+ * wimax_msg_send().
+ *
+ * ROADMAP
+ *
+ * wimax_gnl_doit_msg_from_user() Process a message from user space
+ * wimax_dev_get_by_genl_info()
+ * wimax_dev->op_msg_from_user() Delivery of message to the driver
+ *
+ * wimax_msg() Send a message to user space
+ * wimax_msg_alloc()
+ * wimax_msg_send()
+ */
+#include <linux/device.h>
+#include <net/genetlink.h>
+#include <linux/netdevice.h>
+#include <linux/wimax.h>
+#include <linux/security.h>
+#include "wimax-internal.h"
+
+
+#define D_SUBMODULE op_msg
+#include "debug-levels.h"
+
+
+/**
+ * wimax_msg_alloc - Create a new skb for sending a message to userspace
+ *
+ * @wimax_dev: WiMAX device descriptor
+ * @pipe_name: "named pipe" the message will be sent to
+ * @msg: pointer to the message data to send
+ * @size: size of the message to send (in bytes), including the header.
+ * @gfp_flags: flags for memory allocation.
+ *
+ * Returns: %0 if ok, negative errno code on error
+ *
+ * Description:
+ *
+ * Allocates an skb that will contain the message to send to user
+ * space over the messaging pipe and initializes it, copying the
+ * payload.
+ *
+ * Once this call is done, you can deliver it with
+ * wimax_msg_send().
+ *
+ * IMPORTANT:
+ *
+ * Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as
+ * wimax_msg_send() depends on skb->data being placed at the
+ * beginning of the user message.
+ */
+struct sk_buff *wimax_msg_alloc(struct wimax_dev *wimax_dev,
+ const char *pipe_name,
+ const void *msg, size_t size,
+ gfp_t gfp_flags)
+{
+ int result;
+ struct device *dev = wimax_dev->net_dev->dev.parent;
+ size_t msg_size;
+ void *genl_msg;
+ struct sk_buff *skb;
+
+ msg_size = nla_total_size(size)
+ + nla_total_size(sizeof(u32))
+ + (pipe_name ? nla_total_size(strlen(pipe_name)) : 0);
+ result = -ENOMEM;
+ skb = genlmsg_new(msg_size, gfp_flags);
+ if (skb == NULL)
+ goto error_new;
+ genl_msg = genlmsg_put(skb, 0, 0, &wimax_gnl_family,
+ 0, WIMAX_GNL_OP_MSG_TO_USER);
+ if (genl_msg == NULL) {
+ dev_err(dev, "no memory to create generic netlink message\n");
+ goto error_genlmsg_put;
+ }
+ result = nla_put_u32(skb, WIMAX_GNL_MSG_IFIDX,
+ wimax_dev->net_dev->ifindex);
+ if (result < 0) {
+ dev_err(dev, "no memory to add ifindex attribute\n");
+ goto error_nla_put;
+ }
+ if (pipe_name) {
+ result = nla_put_string(skb, WIMAX_GNL_MSG_PIPE_NAME,
+ pipe_name);
+ if (result < 0) {
+ dev_err(dev, "no memory to add pipe_name attribute\n");
+ goto error_nla_put;
+ }
+ }
+ result = nla_put(skb, WIMAX_GNL_MSG_DATA, size, msg);
+ if (result < 0) {
+ dev_err(dev, "no memory to add payload in attribute\n");
+ goto error_nla_put;
+ }
+ genlmsg_end(skb, genl_msg);
+ return skb;
+
+error_nla_put:
+error_genlmsg_put:
+error_new:
+ nlmsg_free(skb);
+ return ERR_PTR(result);
+
+}
+EXPORT_SYMBOL_GPL(wimax_msg_alloc);
+
+
+/**
+ * wimax_msg_data_len - Return a pointer and size of a message's payload
+ *
+ * @msg: Pointer to a message created with wimax_msg_alloc()
+ * @size: Pointer to where to store the message's size
+ *
+ * Returns the pointer to the message data.
+ */
+const void *wimax_msg_data_len(struct sk_buff *msg, size_t *size)
+{
+ struct nlmsghdr *nlh = (void *) msg->head;
+ struct nlattr *nla;
+
+ nla = nlmsg_find_attr(nlh, sizeof(struct genlmsghdr),
+ WIMAX_GNL_MSG_DATA);
+ if (nla == NULL) {
+ printk(KERN_ERR "Cannot find attribute WIMAX_GNL_MSG_DATA\n");
+ return NULL;
+ }
+ *size = nla_len(nla);
+ return nla_data(nla);
+}
+EXPORT_SYMBOL_GPL(wimax_msg_data_len);
+
+
+/**
+ * wimax_msg_data - Return a pointer to a message's payload
+ *
+ * @msg: Pointer to a message created with wimax_msg_alloc()
+ */
+const void *wimax_msg_data(struct sk_buff *msg)
+{
+ struct nlmsghdr *nlh = (void *) msg->head;
+ struct nlattr *nla;
+
+ nla = nlmsg_find_attr(nlh, sizeof(struct genlmsghdr),
+ WIMAX_GNL_MSG_DATA);
+ if (nla == NULL) {
+ printk(KERN_ERR "Cannot find attribute WIMAX_GNL_MSG_DATA\n");
+ return NULL;
+ }
+ return nla_data(nla);
+}
+EXPORT_SYMBOL_GPL(wimax_msg_data);
+
+
+/**
+ * wimax_msg_len - Return a message's payload length
+ *
+ * @msg: Pointer to a message created with wimax_msg_alloc()
+ */
+ssize_t wimax_msg_len(struct sk_buff *msg)
+{
+ struct nlmsghdr *nlh = (void *) msg->head;
+ struct nlattr *nla;
+
+ nla = nlmsg_find_attr(nlh, sizeof(struct genlmsghdr),
+ WIMAX_GNL_MSG_DATA);
+ if (nla == NULL) {
+ printk(KERN_ERR "Cannot find attribute WIMAX_GNL_MSG_DATA\n");
+ return -EINVAL;
+ }
+ return nla_len(nla);
+}
+EXPORT_SYMBOL_GPL(wimax_msg_len);
+
+
+/**
+ * wimax_msg_send - Send a pre-allocated message to user space
+ *
+ * @wimax_dev: WiMAX device descriptor
+ *
+ * @skb: &struct sk_buff returned by wimax_msg_alloc(). Note the
+ * ownership of @skb is transferred to this function.
+ *
+ * Returns: 0 if ok, < 0 errno code on error
+ *
+ * Description:
+ *
+ * Sends a free-form message that was preallocated with
+ * wimax_msg_alloc() and filled up.
+ *
+ * Assumes that once you pass an skb to this function for sending, it
+ * owns it and will release it when done (on success).
+ *
+ * IMPORTANT:
+ *
+ * Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as
+ * wimax_msg_send() depends on skb->data being placed at the
+ * beginning of the user message.
+ */
+int wimax_msg_send(struct wimax_dev *wimax_dev, struct sk_buff *skb)
+{
+ int result;
+ struct device *dev = wimax_dev->net_dev->dev.parent;
+ void *msg = skb->data;
+ size_t size = skb->len;
+ might_sleep();
+
+ d_printf(1, dev, "CTX: wimax msg, %zu bytes\n", size);
+ d_dump(2, dev, msg, size);
+ result = genlmsg_multicast(skb, 0, wimax_gnl_mcg.id, GFP_KERNEL);
+ d_printf(1, dev, "CTX: genl multicast result %d\n", result);
+ if (result == -ESRCH) /* Nobody connected, ignore it */
+ result = 0; /* btw, the skb is freed already */
+ return result;
+}
+EXPORT_SYMBOL_GPL(wimax_msg_send);
+
+
+/**
+ * wimax_msg - Send a message to user space
+ *
+ * @wimax_dev: WiMAX device descriptor (properly referenced)
+ * @pipe_name: "named pipe" the message will be sent to
+ * @buf: pointer to the message to send.
+ * @size: size of the buffer pointed to by @buf (in bytes).
+ * @gfp_flags: flags for memory allocation.
+ *
+ * Returns: %0 if ok, negative errno code on error.
+ *
+ * Description:
+ *
+ * Sends a free-form message to user space on the device @wimax_dev.
+ *
+ * NOTES:
+ *
+ * Once the @skb is given to this function, who will own it and will
+ * release it when done (unless it returns error).
+ */
+int wimax_msg(struct wimax_dev *wimax_dev, const char *pipe_name,
+ const void *buf, size_t size, gfp_t gfp_flags)
+{
+ int result = -ENOMEM;
+ struct sk_buff *skb;
+
+ skb = wimax_msg_alloc(wimax_dev, pipe_name, buf, size, gfp_flags);
+ if (skb == NULL)
+ goto error_msg_new;
+ result = wimax_msg_send(wimax_dev, skb);
+error_msg_new:
+ return result;
+}
+EXPORT_SYMBOL_GPL(wimax_msg);
+
+
+static const
+struct nla_policy wimax_gnl_msg_policy[WIMAX_GNL_ATTR_MAX + 1] = {
+ [WIMAX_GNL_MSG_IFIDX] = {
+ .type = NLA_U32,
+ },
+ [WIMAX_GNL_MSG_DATA] = {
+ .type = NLA_UNSPEC, /* libnl doesn't grok BINARY yet */
+ },
+};
+
+
+/*
+ * Relays a message from user space to the driver
+ *
+ * The skb is passed to the driver-specific function with the netlink
+ * and generic netlink headers already stripped.
+ *
+ * This call will block while handling/relaying the message.
+ */
+static
+int wimax_gnl_doit_msg_from_user(struct sk_buff *skb, struct genl_info *info)
+{
+ int result, ifindex;
+ struct wimax_dev *wimax_dev;
+ struct device *dev;
+ struct nlmsghdr *nlh = info->nlhdr;
+ char *pipe_name;
+ void *msg_buf;
+ size_t msg_len;
+
+ might_sleep();
+ d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
+ result = -ENODEV;
+ if (info->attrs[WIMAX_GNL_MSG_IFIDX] == NULL) {
+ printk(KERN_ERR "WIMAX_GNL_MSG_FROM_USER: can't find IFIDX "
+ "attribute\n");
+ goto error_no_wimax_dev;
+ }
+ ifindex = nla_get_u32(info->attrs[WIMAX_GNL_MSG_IFIDX]);
+ wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
+ if (wimax_dev == NULL)
+ goto error_no_wimax_dev;
+ dev = wimax_dev_to_dev(wimax_dev);
+
+ /* Unpack arguments */
+ result = -EINVAL;
+ if (info->attrs[WIMAX_GNL_MSG_DATA] == NULL) {
+ dev_err(dev, "WIMAX_GNL_MSG_FROM_USER: can't find MSG_DATA "
+ "attribute\n");
+ goto error_no_data;
+ }
+ msg_buf = nla_data(info->attrs[WIMAX_GNL_MSG_DATA]);
+ msg_len = nla_len(info->attrs[WIMAX_GNL_MSG_DATA]);
+
+ if (info->attrs[WIMAX_GNL_MSG_PIPE_NAME] == NULL)
+ pipe_name = NULL;
+ else {
+ struct nlattr *attr = info->attrs[WIMAX_GNL_MSG_PIPE_NAME];
+ size_t attr_len = nla_len(attr);
+ /* libnl-1.1 does not yet support NLA_NUL_STRING */
+ result = -ENOMEM;
+ pipe_name = kstrndup(nla_data(attr), attr_len + 1, GFP_KERNEL);
+ if (pipe_name == NULL)
+ goto error_alloc;
+ pipe_name[attr_len] = 0;
+ }
+ mutex_lock(&wimax_dev->mutex);
+ result = wimax_dev_is_ready(wimax_dev);
+ if (result < 0)
+ goto error_not_ready;
+ result = -ENOSYS;
+ if (wimax_dev->op_msg_from_user == NULL)
+ goto error_noop;
+
+ d_printf(1, dev,
+ "CRX: nlmsghdr len %u type %u flags 0x%04x seq 0x%x pid %u\n",
+ nlh->nlmsg_len, nlh->nlmsg_type, nlh->nlmsg_flags,
+ nlh->nlmsg_seq, nlh->nlmsg_pid);
+ d_printf(1, dev, "CRX: wimax message %zu bytes\n", msg_len);
+ d_dump(2, dev, msg_buf, msg_len);
+
+ result = wimax_dev->op_msg_from_user(wimax_dev, pipe_name,
+ msg_buf, msg_len, info);
+error_noop:
+error_not_ready:
+ mutex_unlock(&wimax_dev->mutex);
+error_alloc:
+ kfree(pipe_name);
+error_no_data:
+ dev_put(wimax_dev->net_dev);
+error_no_wimax_dev:
+ d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
+ return result;
+}
+
+
+/*
+ * Generic Netlink glue
+ */
+
+struct genl_ops wimax_gnl_msg_from_user = {
+ .cmd = WIMAX_GNL_OP_MSG_FROM_USER,
+ .flags = GENL_ADMIN_PERM,
+ .policy = wimax_gnl_msg_policy,
+ .doit = wimax_gnl_doit_msg_from_user,
+ .dumpit = NULL,
+};
+
--- /dev/null
+/*
+ * Linux WiMAX
+ * Implement and export a method for resetting a WiMAX device
+ *
+ *
+ * Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 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.
+ *
+ *
+ * This implements a simple synchronous call to reset a WiMAX device.
+ *
+ * Resets aim at being warm, keeping the device handles active;
+ * however, when that fails, it falls back to a cold reset (that will
+ * disconnect and reconnect the device).
+ */
+
+#include <net/wimax.h>
+#include <net/genetlink.h>
+#include <linux/wimax.h>
+#include <linux/security.h>
+#include "wimax-internal.h"
+
+#define D_SUBMODULE op_reset
+#include "debug-levels.h"
+
+
+/**
+ * wimax_reset - Reset a WiMAX device
+ *
+ * @wimax_dev: WiMAX device descriptor
+ *
+ * Returns:
+ *
+ * %0 if ok and a warm reset was done (the device still exists in
+ * the system).
+ *
+ * -%ENODEV if a cold/bus reset had to be done (device has
+ * disconnected and reconnected, so current handle is not valid
+ * any more).
+ *
+ * -%EINVAL if the device is not even registered.
+ *
+ * Any other negative error code shall be considered as
+ * non-recoverable.
+ *
+ * Description:
+ *
+ * Called when wanting to reset the device for any reason. Device is
+ * taken back to power on status.
+ *
+ * This call blocks; on succesful return, the device has completed the
+ * reset process and is ready to operate.
+ */
+int wimax_reset(struct wimax_dev *wimax_dev)
+{
+ int result = -EINVAL;
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
+ enum wimax_st state;
+
+ might_sleep();
+ d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev);
+ mutex_lock(&wimax_dev->mutex);
+ dev_hold(wimax_dev->net_dev);
+ state = wimax_dev->state;
+ mutex_unlock(&wimax_dev->mutex);
+
+ if (state >= WIMAX_ST_DOWN) {
+ mutex_lock(&wimax_dev->mutex_reset);
+ result = wimax_dev->op_reset(wimax_dev);
+ mutex_unlock(&wimax_dev->mutex_reset);
+ }
+ dev_put(wimax_dev->net_dev);
+
+ d_fnend(3, dev, "(wimax_dev %p) = %d\n", wimax_dev, result);
+ return result;
+}
+EXPORT_SYMBOL(wimax_reset);
+
+
+static const
+struct nla_policy wimax_gnl_reset_policy[WIMAX_GNL_ATTR_MAX + 1] = {
+ [WIMAX_GNL_RESET_IFIDX] = {
+ .type = NLA_U32,
+ },
+};
+
+
+/*
+ * Exporting to user space over generic netlink
+ *
+ * Parse the reset command from user space, return error code.
+ *
+ * No attributes.
+ */
+static
+int wimax_gnl_doit_reset(struct sk_buff *skb, struct genl_info *info)
+{
+ int result, ifindex;
+ struct wimax_dev *wimax_dev;
+ struct device *dev;
+
+ d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
+ result = -ENODEV;
+ if (info->attrs[WIMAX_GNL_RESET_IFIDX] == NULL) {
+ printk(KERN_ERR "WIMAX_GNL_OP_RFKILL: can't find IFIDX "
+ "attribute\n");
+ goto error_no_wimax_dev;
+ }
+ ifindex = nla_get_u32(info->attrs[WIMAX_GNL_RESET_IFIDX]);
+ wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
+ if (wimax_dev == NULL)
+ goto error_no_wimax_dev;
+ dev = wimax_dev_to_dev(wimax_dev);
+ /* Execute the operation and send the result back to user space */
+ result = wimax_reset(wimax_dev);
+ dev_put(wimax_dev->net_dev);
+error_no_wimax_dev:
+ d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
+ return result;
+}
+
+
+struct genl_ops wimax_gnl_reset = {
+ .cmd = WIMAX_GNL_OP_RESET,
+ .flags = GENL_ADMIN_PERM,
+ .policy = wimax_gnl_reset_policy,
+ .doit = wimax_gnl_doit_reset,
+ .dumpit = NULL,
+};
--- /dev/null
+/*
+ * Linux WiMAX
+ * RF-kill framework integration
+ *
+ *
+ * Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 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.
+ *
+ *
+ * This integrates into the Linux Kernel rfkill susbystem so that the
+ * drivers just have to do the bare minimal work, which is providing a
+ * method to set the software RF-Kill switch and to report changes in
+ * the software and hardware switch status.
+ *
+ * A non-polled generic rfkill device is embedded into the WiMAX
+ * subsystem's representation of a device.
+ *
+ * FIXME: Need polled support? use a timer or add the implementation
+ * to the stack.
+ *
+ * All device drivers have to do is after wimax_dev_init(), call
+ * wimax_report_rfkill_hw() and wimax_report_rfkill_sw() to update
+ * initial state and then every time it changes. See wimax.h:struct
+ * wimax_dev for more information.
+ *
+ * ROADMAP
+ *
+ * wimax_gnl_doit_rfkill() User space calling wimax_rfkill()
+ * wimax_rfkill() Kernel calling wimax_rfkill()
+ * __wimax_rf_toggle_radio()
+ *
+ * wimax_rfkill_toggle_radio() RF-Kill subsytem calling
+ * __wimax_rf_toggle_radio()
+ *
+ * __wimax_rf_toggle_radio()
+ * wimax_dev->op_rfkill_sw_toggle() Driver backend
+ * __wimax_state_change()
+ *
+ * wimax_report_rfkill_sw() Driver reports state change
+ * __wimax_state_change()
+ *
+ * wimax_report_rfkill_hw() Driver reports state change
+ * __wimax_state_change()
+ *
+ * wimax_rfkill_add() Initialize/shutdown rfkill support
+ * wimax_rfkill_rm() [called by wimax_dev_add/rm()]
+ */
+
+#include <net/wimax.h>
+#include <net/genetlink.h>
+#include <linux/wimax.h>
+#include <linux/security.h>
+#include <linux/rfkill.h>
+#include <linux/input.h>
+#include "wimax-internal.h"
+
+#define D_SUBMODULE op_rfkill
+#include "debug-levels.h"
+
+#ifdef CONFIG_RFKILL
+
+
+/**
+ * wimax_report_rfkill_hw - Reports changes in the hardware RF switch
+ *
+ * @wimax_dev: WiMAX device descriptor
+ *
+ * @state: New state of the RF Kill switch. %WIMAX_RF_ON radio on,
+ * %WIMAX_RF_OFF radio off.
+ *
+ * When the device detects a change in the state of thehardware RF
+ * switch, it must call this function to let the WiMAX kernel stack
+ * know that the state has changed so it can be properly propagated.
+ *
+ * The WiMAX stack caches the state (the driver doesn't need to). As
+ * well, as the change is propagated it will come back as a request to
+ * change the software state to mirror the hardware state.
+ *
+ * If the device doesn't have a hardware kill switch, just report
+ * it on initialization as always on (%WIMAX_RF_ON, radio on).
+ */
+void wimax_report_rfkill_hw(struct wimax_dev *wimax_dev,
+ enum wimax_rf_state state)
+{
+ int result;
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
+ enum wimax_st wimax_state;
+ enum rfkill_state rfkill_state;
+
+ d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
+ BUG_ON(state == WIMAX_RF_QUERY);
+ BUG_ON(state != WIMAX_RF_ON && state != WIMAX_RF_OFF);
+
+ mutex_lock(&wimax_dev->mutex);
+ result = wimax_dev_is_ready(wimax_dev);
+ if (result < 0)
+ goto error_not_ready;
+
+ if (state != wimax_dev->rf_hw) {
+ wimax_dev->rf_hw = state;
+ rfkill_state = state == WIMAX_RF_ON ?
+ RFKILL_STATE_OFF : RFKILL_STATE_ON;
+ if (wimax_dev->rf_hw == WIMAX_RF_ON
+ && wimax_dev->rf_sw == WIMAX_RF_ON)
+ wimax_state = WIMAX_ST_READY;
+ else
+ wimax_state = WIMAX_ST_RADIO_OFF;
+ __wimax_state_change(wimax_dev, wimax_state);
+ input_report_key(wimax_dev->rfkill_input, KEY_WIMAX,
+ rfkill_state);
+ }
+error_not_ready:
+ mutex_unlock(&wimax_dev->mutex);
+ d_fnend(3, dev, "(wimax_dev %p state %u) = void [%d]\n",
+ wimax_dev, state, result);
+}
+EXPORT_SYMBOL_GPL(wimax_report_rfkill_hw);
+
+
+/**
+ * wimax_report_rfkill_sw - Reports changes in the software RF switch
+ *
+ * @wimax_dev: WiMAX device descriptor
+ *
+ * @state: New state of the RF kill switch. %WIMAX_RF_ON radio on,
+ * %WIMAX_RF_OFF radio off.
+ *
+ * Reports changes in the software RF switch state to the the WiMAX
+ * stack.
+ *
+ * The main use is during initialization, so the driver can query the
+ * device for its current software radio kill switch state and feed it
+ * to the system.
+ *
+ * On the side, the device does not change the software state by
+ * itself. In practice, this can happen, as the device might decide to
+ * switch (in software) the radio off for different reasons.
+ */
+void wimax_report_rfkill_sw(struct wimax_dev *wimax_dev,
+ enum wimax_rf_state state)
+{
+ int result;
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
+ enum wimax_st wimax_state;
+
+ d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
+ BUG_ON(state == WIMAX_RF_QUERY);
+ BUG_ON(state != WIMAX_RF_ON && state != WIMAX_RF_OFF);
+
+ mutex_lock(&wimax_dev->mutex);
+ result = wimax_dev_is_ready(wimax_dev);
+ if (result < 0)
+ goto error_not_ready;
+
+ if (state != wimax_dev->rf_sw) {
+ wimax_dev->rf_sw = state;
+ if (wimax_dev->rf_hw == WIMAX_RF_ON
+ && wimax_dev->rf_sw == WIMAX_RF_ON)
+ wimax_state = WIMAX_ST_READY;
+ else
+ wimax_state = WIMAX_ST_RADIO_OFF;
+ __wimax_state_change(wimax_dev, wimax_state);
+ }
+error_not_ready:
+ mutex_unlock(&wimax_dev->mutex);
+ d_fnend(3, dev, "(wimax_dev %p state %u) = void [%d]\n",
+ wimax_dev, state, result);
+}
+EXPORT_SYMBOL_GPL(wimax_report_rfkill_sw);
+
+
+/*
+ * Callback for the RF Kill toggle operation
+ *
+ * This function is called by:
+ *
+ * - The rfkill subsystem when the RF-Kill key is pressed in the
+ * hardware and the driver notifies through
+ * wimax_report_rfkill_hw(). The rfkill subsystem ends up calling back
+ * here so the software RF Kill switch state is changed to reflect
+ * the hardware switch state.
+ *
+ * - When the user sets the state through sysfs' rfkill/state file
+ *
+ * - When the user calls wimax_rfkill().
+ *
+ * This call blocks!
+ *
+ * WARNING! When we call rfkill_unregister(), this will be called with
+ * state 0!
+ *
+ * WARNING: wimax_dev must be locked
+ */
+static
+int __wimax_rf_toggle_radio(struct wimax_dev *wimax_dev,
+ enum wimax_rf_state state)
+{
+ int result = 0;
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
+ enum wimax_st wimax_state;
+
+ might_sleep();
+ d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
+ if (wimax_dev->rf_sw == state)
+ goto out_no_change;
+ if (wimax_dev->op_rfkill_sw_toggle != NULL)
+ result = wimax_dev->op_rfkill_sw_toggle(wimax_dev, state);
+ else if (state == WIMAX_RF_OFF) /* No op? can't turn off */
+ result = -ENXIO;
+ else /* No op? can turn on */
+ result = 0; /* should never happen tho */
+ if (result >= 0) {
+ result = 0;
+ wimax_dev->rf_sw = state;
+ wimax_state = state == WIMAX_RF_ON ?
+ WIMAX_ST_READY : WIMAX_ST_RADIO_OFF;
+ __wimax_state_change(wimax_dev, wimax_state);
+ }
+out_no_change:
+ d_fnend(3, dev, "(wimax_dev %p state %u) = %d\n",
+ wimax_dev, state, result);
+ return result;
+}
+
+
+/*
+ * Translate from rfkill state to wimax state
+ *
+ * NOTE: Special state handling rules here
+ *
+ * Just pretend the call didn't happen if we are in a state where
+ * we know for sure it cannot be handled (WIMAX_ST_DOWN or
+ * __WIMAX_ST_QUIESCING). rfkill() needs it to register and
+ * unregister, as it will run this path.
+ *
+ * NOTE: This call will block until the operation is completed.
+ */
+static
+int wimax_rfkill_toggle_radio(void *data, enum rfkill_state state)
+{
+ int result;
+ struct wimax_dev *wimax_dev = data;
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
+ enum wimax_rf_state rf_state;
+
+ d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
+ switch (state) {
+ case RFKILL_STATE_ON:
+ rf_state = WIMAX_RF_OFF;
+ break;
+ case RFKILL_STATE_OFF:
+ rf_state = WIMAX_RF_ON;
+ break;
+ default:
+ BUG();
+ }
+ mutex_lock(&wimax_dev->mutex);
+ if (wimax_dev->state <= __WIMAX_ST_QUIESCING)
+ result = 0; /* just pretend it didn't happen */
+ else
+ result = __wimax_rf_toggle_radio(wimax_dev, rf_state);
+ mutex_unlock(&wimax_dev->mutex);
+ d_fnend(3, dev, "(wimax_dev %p state %u) = %d\n",
+ wimax_dev, state, result);
+ return result;
+}
+
+
+/**
+ * wimax_rfkill - Set the software RF switch state for a WiMAX device
+ *
+ * @wimax_dev: WiMAX device descriptor
+ *
+ * @state: New RF state.
+ *
+ * Returns:
+ *
+ * >= 0 toggle state if ok, < 0 errno code on error. The toggle state
+ * is returned as a bitmap, bit 0 being the hardware RF state, bit 1
+ * the software RF state.
+ *
+ * 0 means disabled (%WIMAX_RF_ON, radio on), 1 means enabled radio
+ * off (%WIMAX_RF_OFF).
+ *
+ * Description:
+ *
+ * Called by the user when he wants to request the WiMAX radio to be
+ * switched on (%WIMAX_RF_ON) or off (%WIMAX_RF_OFF). With
+ * %WIMAX_RF_QUERY, just the current state is returned.
+ *
+ * NOTE:
+ *
+ * This call will block until the operation is complete.
+ */
+int wimax_rfkill(struct wimax_dev *wimax_dev, enum wimax_rf_state state)
+{
+ int result;
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
+
+ d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
+ mutex_lock(&wimax_dev->mutex);
+ result = wimax_dev_is_ready(wimax_dev);
+ if (result < 0)
+ goto error_not_ready;
+ switch (state) {
+ case WIMAX_RF_ON:
+ case WIMAX_RF_OFF:
+ result = __wimax_rf_toggle_radio(wimax_dev, state);
+ if (result < 0)
+ goto error;
+ break;
+ case WIMAX_RF_QUERY:
+ break;
+ default:
+ result = -EINVAL;
+ goto error;
+ }
+ result = wimax_dev->rf_sw << 1 | wimax_dev->rf_hw;
+error:
+error_not_ready:
+ mutex_unlock(&wimax_dev->mutex);
+ d_fnend(3, dev, "(wimax_dev %p state %u) = %d\n",
+ wimax_dev, state, result);
+ return result;
+}
+EXPORT_SYMBOL(wimax_rfkill);
+
+
+/*
+ * Register a new WiMAX device's RF Kill support
+ *
+ * WARNING: wimax_dev->mutex must be unlocked
+ */
+int wimax_rfkill_add(struct wimax_dev *wimax_dev)
+{
+ int result;
+ struct rfkill *rfkill;
+ struct input_dev *input_dev;
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
+
+ d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev);
+ /* Initialize RF Kill */
+ result = -ENOMEM;
+ rfkill = rfkill_allocate(dev, RFKILL_TYPE_WIMAX);
+ if (rfkill == NULL)
+ goto error_rfkill_allocate;
+ wimax_dev->rfkill = rfkill;
+
+ rfkill->name = wimax_dev->name;
+ rfkill->state = RFKILL_STATE_OFF;
+ rfkill->data = wimax_dev;
+ rfkill->toggle_radio = wimax_rfkill_toggle_radio;
+ rfkill->user_claim_unsupported = 1;
+
+ /* Initialize the input device for the hw key */
+ input_dev = input_allocate_device();
+ if (input_dev == NULL)
+ goto error_input_allocate;
+ wimax_dev->rfkill_input = input_dev;
+ d_printf(1, dev, "rfkill %p input %p\n", rfkill, input_dev);
+
+ input_dev->name = wimax_dev->name;
+ /* FIXME: get a real device bus ID and stuff? do we care? */
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->id.vendor = 0xffff;
+ input_dev->evbit[0] = BIT(EV_KEY);
+ set_bit(KEY_WIMAX, input_dev->keybit);
+
+ /* Register both */
+ result = input_register_device(wimax_dev->rfkill_input);
+ if (result < 0)
+ goto error_input_register;
+ result = rfkill_register(wimax_dev->rfkill);
+ if (result < 0)
+ goto error_rfkill_register;
+
+ /* If there is no SW toggle op, SW RFKill is always on */
+ if (wimax_dev->op_rfkill_sw_toggle == NULL)
+ wimax_dev->rf_sw = WIMAX_RF_ON;
+
+ d_fnend(3, dev, "(wimax_dev %p) = 0\n", wimax_dev);
+ return 0;
+
+ /* if rfkill_register() suceeds, can't use rfkill_free() any
+ * more, only rfkill_unregister() [it owns the refcount]; with
+ * the input device we have the same issue--hence the if. */
+error_rfkill_register:
+ input_unregister_device(wimax_dev->rfkill_input);
+ wimax_dev->rfkill_input = NULL;
+error_input_register:
+ if (wimax_dev->rfkill_input)
+ input_free_device(wimax_dev->rfkill_input);
+error_input_allocate:
+ rfkill_free(wimax_dev->rfkill);
+error_rfkill_allocate:
+ d_fnend(3, dev, "(wimax_dev %p) = %d\n", wimax_dev, result);
+ return result;
+}
+
+
+/*
+ * Deregister a WiMAX device's RF Kill support
+ *
+ * Ick, we can't call rfkill_free() after rfkill_unregister()...oh
+ * well.
+ *
+ * WARNING: wimax_dev->mutex must be unlocked
+ */
+void wimax_rfkill_rm(struct wimax_dev *wimax_dev)
+{
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
+ d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev);
+ rfkill_unregister(wimax_dev->rfkill); /* frees */
+ input_unregister_device(wimax_dev->rfkill_input);
+ d_fnend(3, dev, "(wimax_dev %p)\n", wimax_dev);
+}
+
+
+#else /* #ifdef CONFIG_RFKILL */
+
+void wimax_report_rfkill_hw(struct wimax_dev *wimax_dev,
+ enum wimax_rf_state state)
+{
+}
+EXPORT_SYMBOL_GPL(wimax_report_rfkill_hw);
+
+void wimax_report_rfkill_sw(struct wimax_dev *wimax_dev,
+ enum wimax_rf_state state)
+{
+}
+EXPORT_SYMBOL_GPL(wimax_report_rfkill_sw);
+
+int wimax_rfkill(struct wimax_dev *wimax_dev,
+ enum wimax_rf_state state)
+{
+ return WIMAX_RF_ON << 1 | WIMAX_RF_ON;
+}
+EXPORT_SYMBOL_GPL(wimax_rfkill);
+
+int wimax_rfkill_add(struct wimax_dev *wimax_dev)
+{
+ return 0;
+}
+
+void wimax_rfkill_rm(struct wimax_dev *wimax_dev)
+{
+}
+
+#endif /* #ifdef CONFIG_RFKILL */
+
+
+/*
+ * Exporting to user space over generic netlink
+ *
+ * Parse the rfkill command from user space, return a combination
+ * value that describe the states of the different toggles.
+ *
+ * Only one attribute: the new state requested (on, off or no change,
+ * just query).
+ */
+
+static const
+struct nla_policy wimax_gnl_rfkill_policy[WIMAX_GNL_ATTR_MAX + 1] = {
+ [WIMAX_GNL_RFKILL_IFIDX] = {
+ .type = NLA_U32,
+ },
+ [WIMAX_GNL_RFKILL_STATE] = {
+ .type = NLA_U32 /* enum wimax_rf_state */
+ },
+};
+
+
+static
+int wimax_gnl_doit_rfkill(struct sk_buff *skb, struct genl_info *info)
+{
+ int result, ifindex;
+ struct wimax_dev *wimax_dev;
+ struct device *dev;
+ enum wimax_rf_state new_state;
+
+ d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
+ result = -ENODEV;
+ if (info->attrs[WIMAX_GNL_RFKILL_IFIDX] == NULL) {
+ printk(KERN_ERR "WIMAX_GNL_OP_RFKILL: can't find IFIDX "
+ "attribute\n");
+ goto error_no_wimax_dev;
+ }
+ ifindex = nla_get_u32(info->attrs[WIMAX_GNL_RFKILL_IFIDX]);
+ wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
+ if (wimax_dev == NULL)
+ goto error_no_wimax_dev;
+ dev = wimax_dev_to_dev(wimax_dev);
+ result = -EINVAL;
+ if (info->attrs[WIMAX_GNL_RFKILL_STATE] == NULL) {
+ dev_err(dev, "WIMAX_GNL_RFKILL: can't find RFKILL_STATE "
+ "attribute\n");
+ goto error_no_pid;
+ }
+ new_state = nla_get_u32(info->attrs[WIMAX_GNL_RFKILL_STATE]);
+
+ /* Execute the operation and send the result back to user space */
+ result = wimax_rfkill(wimax_dev, new_state);
+error_no_pid:
+ dev_put(wimax_dev->net_dev);
+error_no_wimax_dev:
+ d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
+ return result;
+}
+
+
+struct genl_ops wimax_gnl_rfkill = {
+ .cmd = WIMAX_GNL_OP_RFKILL,
+ .flags = GENL_ADMIN_PERM,
+ .policy = wimax_gnl_rfkill_policy,
+ .doit = wimax_gnl_doit_rfkill,
+ .dumpit = NULL,
+};
+
projects / linux-2.6-omap-h63xx.git / commitdiff