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coral / linux-mtk / 8966961b31c251b854169e9886394c2a20f2cea7 / . / drivers / staging / csr / io.c
blob: af9c28f073b977585d09166fa574f29e687ed1cb [file] [log] [blame]
/*
* ---------------------------------------------------------------------------
* FILE: io.c
*
* PURPOSE:
* This file contains routines that the SDIO driver can call when a
* UniFi card is first inserted (or detected) and removed.
*
* When used with sdioemb, the udev scripts (at least on Ubuntu) don't
* recognise a UniFi being added to the system. This is because sdioemb
* does not register itself as a device_driver, it uses it's own code
* to handle insert and remove.
* To have Ubuntu recognise UniFi, edit /etc/udev/rules.d/85-ifupdown.rules
* to change this line:
* SUBSYSTEM=="net", DRIVERS=="?*", GOTO="net_start"
* to these:
* #SUBSYSTEM=="net", DRIVERS=="?*", GOTO="net_start"
* SUBSYSTEM=="net", GOTO="net_start"
*
* Then you can add a stanza to /etc/network/interfaces like this:
* auto eth1
* iface eth1 inet dhcp
* wpa-conf /etc/wpa_supplicant.conf
* This will then automatically associate when a car dis inserted.
*
* Copyright (C) 2006-2009 by Cambridge Silicon Radio Ltd.
*
* Refer to LICENSE.txt included with this source code for details on
* the license terms.
*
* ---------------------------------------------------------------------------
*/
#include <linux/proc_fs.h>
#include "csr_wifi_hip_unifi.h"
#include "csr_wifi_hip_unifiversion.h"
#include "csr_wifi_hip_unifi_udi.h" /* for unifi_print_status() */
#include "unifiio.h"
#include "unifi_priv.h"
/*
* Array of pointers to context structs for unifi devices that are present.
* The index in the array corresponds to the wlan interface number
* (if "wlan*" is used). If "eth*" is used, the eth* numbers are allocated
* after any Ethernet cards.
*
* The Arasan PCI-SDIO controller card supported by this driver has 2 slots,
* hence a max of 2 devices.
*/
static unifi_priv_t *Unifi_instances[MAX_UNIFI_DEVS];
/* Array of pointers to netdev objects used by the UniFi driver, as there
* are now many per instance. This is used to determine which netdev events
* are for UniFi as opposed to other net interfaces.
*/
static netInterface_priv_t *Unifi_netdev_instances[MAX_UNIFI_DEVS * CSR_WIFI_NUM_INTERFACES];
/*
* Array to hold the status of each unifi device in each slot.
* We only process an insert event when In_use[] for the slot is
* UNIFI_DEV_NOT_IN_USE. Otherwise, it means that the slot is in use or
* we are in the middle of a cleanup (the action on unplug).
*/
#define UNIFI_DEV_NOT_IN_USE 0
#define UNIFI_DEV_IN_USE 1
#define UNIFI_DEV_CLEANUP 2
static int In_use[MAX_UNIFI_DEVS];
/*
* Mutex to prevent UDI clients to open the character device before the priv
* is created and initialised.
*/
DEFINE_SEMAPHORE(Unifi_instance_mutex);
/*
* When the device is removed, unregister waits on Unifi_cleanup_wq
* until all the UDI clients release the character device.
*/
DECLARE_WAIT_QUEUE_HEAD(Unifi_cleanup_wq);
static int uf_read_proc(char *page, char **start, off_t offset, int count,
int *eof, void *data);
#ifdef CSR_WIFI_RX_PATH_SPLIT
static CsrResult signal_buffer_init(unifi_priv_t * priv, int size)
{
int i;
priv->rxSignalBuffer.writePointer =
priv->rxSignalBuffer.readPointer = 0;
priv->rxSignalBuffer.size = size;
/* Allocating Memory for Signal primitive pointer */
for(i=0; i<size; i++)
{
priv->rxSignalBuffer.rx_buff[i].sig_len=0;
priv->rxSignalBuffer.rx_buff[i].bufptr = kmalloc(UNIFI_PACKED_SIGBUF_SIZE, GFP_KERNEL);
if (priv->rxSignalBuffer.rx_buff[i].bufptr == NULL)
{
int j;
unifi_error(priv,"signal_buffer_init:Failed to Allocate shared memory for T-H signals \n");
for(j=0;j<i;j++)
{
priv->rxSignalBuffer.rx_buff[j].sig_len=0;
kfree(priv->rxSignalBuffer.rx_buff[j].bufptr);
priv->rxSignalBuffer.rx_buff[j].bufptr = NULL;
}
return -1;
}
}
return 0;
}
static void signal_buffer_free(unifi_priv_t * priv, int size)
{
int i;
for(i=0; i<size; i++)
{
priv->rxSignalBuffer.rx_buff[i].sig_len=0;
kfree(priv->rxSignalBuffer.rx_buff[i].bufptr);
priv->rxSignalBuffer.rx_buff[i].bufptr = NULL;
}
}
#endif
/*
* ---------------------------------------------------------------------------
* uf_register_netdev
*
* Registers the network interface, installes the qdisc,
* and registers the inet handler.
* In the porting exercise, register the driver to the network
* stack if necessary.
*
* Arguments:
* priv Pointer to driver context.
*
* Returns:
* O on success, non-zero otherwise.
*
* Notes:
* We will only unregister when the card is ejected, so we must
* only do it once.
* ---------------------------------------------------------------------------
*/
int
uf_register_netdev(unifi_priv_t *priv, int interfaceTag)
{
int r;
netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];
if (interfaceTag >= CSR_WIFI_NUM_INTERFACES) {
unifi_error(priv, "uf_register_netdev bad interfaceTag\n");
return -EINVAL;
}
/*
* Allocates a device number and registers device with the network
* stack.
*/
unifi_trace(priv, UDBG5, "uf_register_netdev: netdev %d - 0x%p\n",
interfaceTag, priv->netdev[interfaceTag]);
r = register_netdev(priv->netdev[interfaceTag]);
if (r) {
unifi_error(priv, "Failed to register net device\n");
return -EINVAL;
}
/* The device is registed */
interfacePriv->netdev_registered = 1;
#ifdef CSR_SUPPORT_SME
/*
* Register the inet handler; it notifies us for changes in the IP address.
*/
uf_register_inet_notifier();
#endif /* CSR_SUPPORT_SME */
unifi_notice(priv, "unifi%d is %s\n",
priv->instance, priv->netdev[interfaceTag]->name);
return 0;
} /* uf_register_netdev */
/*
* ---------------------------------------------------------------------------
* uf_unregister_netdev
*
* Unregisters the network interface and the inet handler.
*
* Arguments:
* priv Pointer to driver context.
*
* Returns:
* None.
*
* ---------------------------------------------------------------------------
*/
void
uf_unregister_netdev(unifi_priv_t *priv)
{
int i=0;
#ifdef CSR_SUPPORT_SME
/* Unregister the inet handler... */
uf_unregister_inet_notifier();
#endif /* CSR_SUPPORT_SME */
for (i=0; i<CSR_WIFI_NUM_INTERFACES; i++) {
netInterface_priv_t *interfacePriv = priv->interfacePriv[i];
if (interfacePriv->netdev_registered) {
unifi_trace(priv, UDBG5,
"uf_unregister_netdev: netdev %d - 0x%p\n",
i, priv->netdev[i]);
/* ... and the netdev */
unregister_netdev(priv->netdev[i]);
interfacePriv->netdev_registered = 0;
}
interfacePriv->interfaceMode = 0;
/* Enable all queues by default */
interfacePriv->queueEnabled[0] = 1;
interfacePriv->queueEnabled[1] = 1;
interfacePriv->queueEnabled[2] = 1;
interfacePriv->queueEnabled[3] = 1;
}
priv->totalInterfaceCount = 0;
} /* uf_unregister_netdev() */
/*
* ---------------------------------------------------------------------------
* register_unifi_sdio
*
* This function is called from the Probe (or equivalent) method of
* the SDIO driver when a UniFi card is detected.
* We allocate the Linux net_device struct, initialise the HIP core
* lib, create the char device nodes and start the userspace helper
* to initialise the device.
*
* Arguments:
* sdio_dev Pointer to SDIO context handle to use for all
* SDIO ops.
* bus_id A small number indicating the SDIO card position on the
* bus. Typically this is the slot number, e.g. 0, 1 etc.
* Valid values are 0 to MAX_UNIFI_DEVS-1.
* dev Pointer to kernel device manager struct.
*
* Returns:
* Pointer to the unifi instance, or NULL on error.
* ---------------------------------------------------------------------------
*/
static unifi_priv_t *
register_unifi_sdio(CsrSdioFunction *sdio_dev, int bus_id, struct device *dev)
{
unifi_priv_t *priv = NULL;
int r = -1;
CsrResult csrResult;
if ((bus_id < 0) || (bus_id >= MAX_UNIFI_DEVS)) {
unifi_error(priv, "register_unifi_sdio: invalid device %d\n",
bus_id);
return NULL;
}
down(&Unifi_instance_mutex);
if (In_use[bus_id] != UNIFI_DEV_NOT_IN_USE) {
unifi_error(priv, "register_unifi_sdio: device %d is already in use\n",
bus_id);
goto failed0;
}
/* Allocate device private and net_device structs */
priv = uf_alloc_netdevice(sdio_dev, bus_id);
if (priv == NULL) {
unifi_error(priv, "Failed to allocate driver private\n");
goto failed0;
}
priv->unifi_device = dev;
SET_NETDEV_DEV(priv->netdev[0], dev);
/* We are not ready to send data yet. */
netif_carrier_off(priv->netdev[0]);
/* Allocate driver context. */
priv->card = unifi_alloc_card(priv->sdio, priv);
if (priv->card == NULL) {
unifi_error(priv, "Failed to allocate UniFi driver card struct.\n");
goto failed1;
}
if (Unifi_instances[bus_id]) {
unifi_error(priv, "Internal error: instance for slot %d is already taken\n",
bus_id);
}
Unifi_instances[bus_id] = priv;
In_use[bus_id] = UNIFI_DEV_IN_USE;
/* Save the netdev_priv for use by the netdev event callback mechanism */
Unifi_netdev_instances[bus_id * CSR_WIFI_NUM_INTERFACES] = netdev_priv(priv->netdev[0]);
/* Initialise the mini-coredump capture buffers */
csrResult = unifi_coredump_init(priv->card, (u16)coredump_max);
if (csrResult != CSR_RESULT_SUCCESS) {
unifi_error(priv, "Couldn't allocate mini-coredump buffers\n");
}
/* Create the character device nodes */
r = uf_create_device_nodes(priv, bus_id);
if (r) {
goto failed1;
}
/*
* We use the slot number as unifi device index.
*/
scnprintf(priv->proc_entry_name, 64, "driver/unifi%d", priv->instance);
/*
* The following complex casting is in place in order to eliminate 64-bit compilation warning
* "cast to/from pointer from/to integer of different size"
*/
if (!create_proc_read_entry(priv->proc_entry_name, 0, 0,
uf_read_proc, (void *)(long)priv->instance))
{
unifi_error(priv, "unifi: can't create /proc/driver/unifi\n");
}
/* Allocate the net_device for interfaces other than 0. */
{
int i;
priv->totalInterfaceCount =0;
for(i=1;i<CSR_WIFI_NUM_INTERFACES;i++)
{
if( !uf_alloc_netdevice_for_other_interfaces(priv,i) )
{
/* error occured while allocating the net_device for interface[i]. The net_device are
* allocated for the interfaces with id<i. Dont worry, all the allocated net_device will
* be releasing chen the control goes to the label failed0.
*/
unifi_error(priv, "Failed to allocate driver private for interface[%d]\n",i);
goto failed0;
}
else
{
SET_NETDEV_DEV(priv->netdev[i], dev);
/* We are not ready to send data yet. */
netif_carrier_off(priv->netdev[i]);
/* Save the netdev_priv for use by the netdev event callback mechanism */
Unifi_netdev_instances[bus_id * CSR_WIFI_NUM_INTERFACES + i] = netdev_priv(priv->netdev[i]);
}
}
for(i=0;i<CSR_WIFI_NUM_INTERFACES;i++)
{
netInterface_priv_t *interfacePriv = priv->interfacePriv[i];
interfacePriv->netdev_registered=0;
}
}
#ifdef CSR_WIFI_RX_PATH_SPLIT
if (signal_buffer_init(priv, CSR_WIFI_RX_SIGNAL_BUFFER_SIZE))
{
unifi_error(priv,"Failed to allocate shared memory for T-H signals\n");
goto failed2;
}
priv->rx_workqueue = create_singlethread_workqueue("rx_workq");
if (priv->rx_workqueue == NULL) {
unifi_error(priv,"create_singlethread_workqueue failed \n");
goto failed3;
}
INIT_WORK(&priv->rx_work_struct, rx_wq_handler);
#endif
#ifdef CSR_WIFI_HIP_DEBUG_OFFLINE
if (log_hip_signals)
{
uf_register_hip_offline_debug(priv);
}
#endif
/* Initialise the SME related threads and parameters */
r = uf_sme_init(priv);
if (r) {
unifi_error(priv, "SME initialisation failed.\n");
goto failed4;
}
/*
* Run the userspace helper program (unififw) to perform
* the device initialisation.
*/
unifi_trace(priv, UDBG1, "run UniFi helper app...\n");
r = uf_run_unifihelper(priv);
if (r) {
unifi_notice(priv, "unable to run UniFi helper app\n");
/* Not a fatal error. */
}
up(&Unifi_instance_mutex);
return priv;
failed4:
#ifdef CSR_WIFI_HIP_DEBUG_OFFLINE
if (log_hip_signals)
{
uf_unregister_hip_offline_debug(priv);
}
#endif
#ifdef CSR_WIFI_RX_PATH_SPLIT
flush_workqueue(priv->rx_workqueue);
destroy_workqueue(priv->rx_workqueue);
failed3:
signal_buffer_free(priv,CSR_WIFI_RX_SIGNAL_BUFFER_SIZE);
failed2:
#endif
/* Remove the device nodes */
uf_destroy_device_nodes(priv);
failed1:
/* Deregister priv->netdev_client */
ul_deregister_client(priv->netdev_client);
failed0:
if (priv && priv->card) {
unifi_coredump_free(priv->card);
unifi_free_card(priv->card);
}
if (priv) {
uf_free_netdevice(priv);
}
up(&Unifi_instance_mutex);
return NULL;
} /* register_unifi_sdio() */
/*
* ---------------------------------------------------------------------------
* ask_unifi_sdio_cleanup
*
* We can not free our private context, until all the char device
* clients have closed the file handles. unregister_unifi_sdio() which
* is called when a card is removed, waits on Unifi_cleanup_wq until
* the reference count becomes zero. It is time to wake it up now.
*
* Arguments:
* priv Pointer to driver context.
*
* Returns:
* None.
* ---------------------------------------------------------------------------
*/
static void
ask_unifi_sdio_cleanup(unifi_priv_t *priv)
{
/*
* Now clear the flag that says the old instance is in use.
* This is used to prevent a new instance being started before old
* one has finshed closing down, for example if bounce makes the card
* appear to be ejected and re-inserted quickly.
*/
In_use[priv->instance] = UNIFI_DEV_CLEANUP;
unifi_trace(NULL, UDBG5, "ask_unifi_sdio_cleanup: wake up cleanup workqueue.\n");
wake_up(&Unifi_cleanup_wq);
} /* ask_unifi_sdio_cleanup() */
/*
* ---------------------------------------------------------------------------
* cleanup_unifi_sdio
*
* Release any resources owned by a unifi instance.
*
* Arguments:
* priv Pointer to the instance to free.
*
* Returns:
* None.
* ---------------------------------------------------------------------------
*/
static void
cleanup_unifi_sdio(unifi_priv_t *priv)
{
int priv_instance;
int i;
static const CsrWifiMacAddress broadcast_address = {{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}};
/* Remove the device nodes */
uf_destroy_device_nodes(priv);
/* Mark this device as gone away by NULLing the entry in Unifi_instances */
Unifi_instances[priv->instance] = NULL;
unifi_trace(priv, UDBG5, "cleanup_unifi_sdio: remove_proc_entry\n");
/*
* Free the children of priv before unifi_free_netdevice() frees
* the priv struct
*/
remove_proc_entry(priv->proc_entry_name, 0);
/* Unregister netdev as a client. */
if (priv->netdev_client) {
unifi_trace(priv, UDBG2, "Netdev client (id:%d s:0x%X) is unregistered\n",
priv->netdev_client->client_id, priv->netdev_client->sender_id);
ul_deregister_client(priv->netdev_client);
}
/* Destroy the SME related threads and parameters */
uf_sme_deinit(priv);
#ifdef CSR_SME_USERSPACE
priv->smepriv = NULL;
#endif
#ifdef CSR_WIFI_HIP_DEBUG_OFFLINE
if (log_hip_signals)
{
uf_unregister_hip_offline_debug(priv);
}
#endif
/* Free any packets left in the Rx queues */
for(i=0;i<CSR_WIFI_NUM_INTERFACES;i++)
{
uf_free_pending_rx_packets(priv, UF_UNCONTROLLED_PORT_Q, broadcast_address,i);
uf_free_pending_rx_packets(priv, UF_CONTROLLED_PORT_Q, broadcast_address,i);
}
/*
* We need to free the resources held by the core, which include tx skbs,
* otherwise we can not call unregister_netdev().
*/
if (priv->card) {
unifi_trace(priv, UDBG5, "cleanup_unifi_sdio: free card\n");
unifi_coredump_free(priv->card);
unifi_free_card(priv->card);
priv->card = NULL;
}
/*
* Unregister the network device.
* We can not unregister the netdev before we release
* all pending packets in the core.
*/
uf_unregister_netdev(priv);
priv->totalInterfaceCount = 0;
/* Clear the table of registered netdev_priv's */
for (i = 0; i < CSR_WIFI_NUM_INTERFACES; i++) {
Unifi_netdev_instances[priv->instance * CSR_WIFI_NUM_INTERFACES + i] = NULL;
}
unifi_trace(priv, UDBG5, "cleanup_unifi_sdio: uf_free_netdevice\n");
/*
* When uf_free_netdevice() returns, the priv is invalid
* so we need to remember the instance to clear the global flag later.
*/
priv_instance = priv->instance;
#ifdef CSR_WIFI_RX_PATH_SPLIT
flush_workqueue(priv->rx_workqueue);
destroy_workqueue(priv->rx_workqueue);
signal_buffer_free(priv,CSR_WIFI_RX_SIGNAL_BUFFER_SIZE);
#endif
/* Priv is freed as part of the net_device */
uf_free_netdevice(priv);
/*
* Now clear the flag that says the old instance is in use.
* This is used to prevent a new instance being started before old
* one has finshed closing down, for example if bounce makes the card
* appear to be ejected and re-inserted quickly.
*/
In_use[priv_instance] = UNIFI_DEV_NOT_IN_USE;
unifi_trace(NULL, UDBG5, "cleanup_unifi_sdio: DONE.\n");
} /* cleanup_unifi_sdio() */
/*
* ---------------------------------------------------------------------------
* unregister_unifi_sdio
*
* Call from SDIO driver when it detects that UniFi has been removed.
*
* Arguments:
* bus_id Number of the card that was ejected.
*
* Returns:
* None.
* ---------------------------------------------------------------------------
*/
static void
unregister_unifi_sdio(int bus_id)
{
unifi_priv_t *priv;
int interfaceTag=0;
u8 reason = CONFIG_IND_EXIT;
if ((bus_id < 0) || (bus_id >= MAX_UNIFI_DEVS)) {
unifi_error(NULL, "unregister_unifi_sdio: invalid device %d\n",
bus_id);
return;
}
priv = Unifi_instances[bus_id];
if (priv == NULL) {
unifi_error(priv, "unregister_unifi_sdio: device %d is not registered\n",
bus_id);
return;
}
/* Stop the network traffic before freeing the core. */
for(interfaceTag=0;interfaceTag<priv->totalInterfaceCount;interfaceTag++)
{
netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];
if(interfacePriv->netdev_registered)
{
netif_carrier_off(priv->netdev[interfaceTag]);
netif_tx_stop_all_queues(priv->netdev[interfaceTag]);
}
}
#ifdef CSR_NATIVE_LINUX
/*
* If the unifi thread was started, signal it to stop. This
* should cause any userspace processes with open unifi device to
* close them.
*/
uf_stop_thread(priv, &priv->bh_thread);
/* Unregister the interrupt handler */
if (csr_sdio_linux_remove_irq(priv->sdio)) {
unifi_notice(priv,
"csr_sdio_linux_remove_irq failed to talk to card.\n");
}
/* Ensure no MLME functions are waiting on a the mlme_event semaphore. */
uf_abort_mlme(priv);
#endif /* CSR_NATIVE_LINUX */
ul_log_config_ind(priv, &reason, sizeof(u8));
/* Deregister the UDI hook from the core. */
unifi_remove_udi_hook(priv->card, logging_handler);
uf_put_instance(bus_id);
/*
* Wait until the device is cleaned up. i.e., when all userspace
* processes have closed any open unifi devices.
*/
wait_event(Unifi_cleanup_wq, In_use[bus_id] == UNIFI_DEV_CLEANUP);
unifi_trace(NULL, UDBG5, "Received clean up event\n");
/* Now we can free the private context and the char device nodes */
cleanup_unifi_sdio(priv);
} /* unregister_unifi_sdio() */
/*
* ---------------------------------------------------------------------------
* uf_find_instance
*
* Find the context structure for a given UniFi device instance.
*
* Arguments:
* inst The instance number to look for.
*
* Returns:
* None.
* ---------------------------------------------------------------------------
*/
unifi_priv_t *
uf_find_instance(int inst)
{
if ((inst < 0) || (inst >= MAX_UNIFI_DEVS)) {
return NULL;
}
return Unifi_instances[inst];
} /* uf_find_instance() */
/*
* ---------------------------------------------------------------------------
* uf_find_priv
*
* Find the device instance for a given context structure.
*
* Arguments:
* priv The context structure pointer to look for.
*
* Returns:
* index of instance, -1 otherwise.
* ---------------------------------------------------------------------------
*/
int
uf_find_priv(unifi_priv_t *priv)
{
int inst;
if (!priv) {
return -1;
}
for (inst = 0; inst < MAX_UNIFI_DEVS; inst++) {
if (Unifi_instances[inst] == priv) {
return inst;
}
}
return -1;
} /* uf_find_priv() */
/*
* ---------------------------------------------------------------------------
* uf_find_netdev_priv
*
* Find the device instance for a given netdev context structure.
*
* Arguments:
* priv The context structure pointer to look for.
*
* Returns:
* index of instance, -1 otherwise.
* ---------------------------------------------------------------------------
*/
int
uf_find_netdev_priv(netInterface_priv_t *priv)
{
int inst;
if (!priv) {
return -1;
}
for (inst = 0; inst < MAX_UNIFI_DEVS * CSR_WIFI_NUM_INTERFACES; inst++) {
if (Unifi_netdev_instances[inst] == priv) {
return inst;
}
}
return -1;
} /* uf_find_netdev_priv() */
/*
* ---------------------------------------------------------------------------
* uf_get_instance
*
* Find the context structure for a given UniFi device instance
* and increment the reference count.
*
* Arguments:
* inst The instance number to look for.
*
* Returns:
* Pointer to the instance or NULL if no instance exists.
* ---------------------------------------------------------------------------
*/
unifi_priv_t *
uf_get_instance(int inst)
{
unifi_priv_t *priv;
down(&Unifi_instance_mutex);
priv = uf_find_instance(inst);
if (priv) {
priv->ref_count++;
}
up(&Unifi_instance_mutex);
return priv;
}
/*
* ---------------------------------------------------------------------------
* uf_put_instance
*
* Decrement the context reference count, freeing resources and
* shutting down the driver when the count reaches zero.
*
* Arguments:
* inst The instance number to look for.
*
* Returns:
* Pointer to the instance or NULL if no instance exists.
* ---------------------------------------------------------------------------
*/
void
uf_put_instance(int inst)
{
unifi_priv_t *priv;
down(&Unifi_instance_mutex);
priv = uf_find_instance(inst);
if (priv) {
priv->ref_count--;
if (priv->ref_count == 0) {
ask_unifi_sdio_cleanup(priv);
}
}
up(&Unifi_instance_mutex);
}
/*
* ---------------------------------------------------------------------------
* uf_read_proc
*
* Read method for driver node in /proc/driver/unifi0
*
* Arguments:
* page
* start
* offset
* count
* eof
* data
*
* Returns:
* None.
* ---------------------------------------------------------------------------
*/
#ifdef CONFIG_PROC_FS
static int
uf_read_proc(char *page, char **start, off_t offset, int count,
int *eof, void *data)
{
#define UNIFI_DEBUG_TXT_BUFFER 8*1024
unifi_priv_t *priv;
int actual_amount_to_copy;
char *p, *orig_p;
s32 remain = UNIFI_DEBUG_TXT_BUFFER;
s32 written;
int i;
/*
* The following complex casting is in place in order to eliminate 64-bit compilation warning
* "cast to/from pointer from/to integer of different size"
*/
priv = uf_find_instance((int)(long)data);
if (!priv) {
return 0;
}
p = kmalloc( UNIFI_DEBUG_TXT_BUFFER, GFP_KERNEL );
orig_p = p;
written = scnprintf(p, remain, "UniFi SDIO Driver: %s %s %s\n",
CSR_WIFI_VERSION, __DATE__, __TIME__);
UNIFI_SNPRINTF_RET(p, remain, written);
#ifdef CSR_SME_USERSPACE
written = scnprintf(p, remain, "SME: CSR userspace ");
UNIFI_SNPRINTF_RET(p, remain, written);
#ifdef CSR_SUPPORT_WEXT
written = scnprintf(p, remain, "with WEXT support\n");
#else
written = scnprintf(p, remain, "\n");
#endif /* CSR_SUPPORT_WEXT */
UNIFI_SNPRINTF_RET(p, remain, written);
#endif /* CSR_SME_USERSPACE */
#ifdef CSR_NATIVE_LINUX
written = scnprintf(p, remain, "SME: native\n");
UNIFI_SNPRINTF_RET(p, remain, written);
#endif
#ifdef CSR_SUPPORT_SME
written = scnprintf(p, remain,
"Firmware (ROM) build:%u, Patch:%u\n",
priv->card_info.fw_build,
priv->sme_versions.firmwarePatch);
UNIFI_SNPRINTF_RET(p, remain, written);
#endif
p += unifi_print_status(priv->card, p, &remain);
written = scnprintf(p, remain, "Last dbg str: %s\n",
priv->last_debug_string);
UNIFI_SNPRINTF_RET(p, remain, written);
written = scnprintf(p, remain, "Last dbg16:");
UNIFI_SNPRINTF_RET(p, remain, written);
for (i = 0; i < 8; i++) {
written = scnprintf(p, remain, " %04X",
priv->last_debug_word16[i]);
UNIFI_SNPRINTF_RET(p, remain, written);
}
written = scnprintf(p, remain, "\n");
UNIFI_SNPRINTF_RET(p, remain, written);
written = scnprintf(p, remain, " ");
UNIFI_SNPRINTF_RET(p, remain, written);
for (; i < 16; i++) {
written = scnprintf(p, remain, " %04X",
priv->last_debug_word16[i]);
UNIFI_SNPRINTF_RET(p, remain, written);
}
written = scnprintf(p, remain, "\n");
UNIFI_SNPRINTF_RET(p, remain, written);
*start = page;
written = UNIFI_DEBUG_TXT_BUFFER - remain;
if( offset >= written )
{
*eof = 1;
kfree( orig_p );
return(0);
}
if( offset + count > written )
{
actual_amount_to_copy = written - offset;
*eof = 1;
}
else
{
actual_amount_to_copy = count;
}
memcpy( page, &(orig_p[offset]), actual_amount_to_copy );
kfree( orig_p );
return( actual_amount_to_copy );
} /* uf_read_proc() */
#endif
static void
uf_lx_suspend(CsrSdioFunction *sdio_ctx)
{
unifi_priv_t *priv = sdio_ctx->driverData;
unifi_suspend(priv);
CsrSdioSuspendAcknowledge(sdio_ctx, CSR_RESULT_SUCCESS);
}
static void
uf_lx_resume(CsrSdioFunction *sdio_ctx)
{
unifi_priv_t *priv = sdio_ctx->driverData;
unifi_resume(priv);
CsrSdioResumeAcknowledge(sdio_ctx, CSR_RESULT_SUCCESS);
}
static int active_slot = MAX_UNIFI_DEVS;
static struct device *os_devices[MAX_UNIFI_DEVS];
void
uf_add_os_device(int bus_id, struct device *os_device)
{
if ((bus_id < 0) || (bus_id >= MAX_UNIFI_DEVS)) {
unifi_error(NULL, "uf_add_os_device: invalid device %d\n",
bus_id);
return;
}
active_slot = bus_id;
os_devices[bus_id] = os_device;
} /* uf_add_os_device() */
void
uf_remove_os_device(int bus_id)
{
if ((bus_id < 0) || (bus_id >= MAX_UNIFI_DEVS)) {
unifi_error(NULL, "uf_remove_os_device: invalid device %d\n",
bus_id);
return;
}
active_slot = bus_id;
os_devices[bus_id] = NULL;
} /* uf_remove_os_device() */
static void
uf_sdio_inserted(CsrSdioFunction *sdio_ctx)
{
unifi_priv_t *priv;
unifi_trace(NULL, UDBG5, "uf_sdio_inserted(0x%p), slot_id=%d, dev=%p\n",
sdio_ctx, active_slot, os_devices[active_slot]);
priv = register_unifi_sdio(sdio_ctx, active_slot, os_devices[active_slot]);
if (priv == NULL) {
CsrSdioInsertedAcknowledge(sdio_ctx, CSR_RESULT_FAILURE);
return;
}
sdio_ctx->driverData = priv;
CsrSdioInsertedAcknowledge(sdio_ctx, CSR_RESULT_SUCCESS);
} /* uf_sdio_inserted() */
static void
uf_sdio_removed(CsrSdioFunction *sdio_ctx)
{
unregister_unifi_sdio(active_slot);
CsrSdioRemovedAcknowledge(sdio_ctx);
} /* uf_sdio_removed() */
static void
uf_sdio_dsr_handler(CsrSdioFunction *sdio_ctx)
{
unifi_priv_t *priv = sdio_ctx->driverData;
unifi_sdio_interrupt_handler(priv->card);
} /* uf_sdio_dsr_handler() */
/*
* ---------------------------------------------------------------------------
* uf_sdio_int_handler
*
* Interrupt callback function for SDIO interrupts.
* This is called in kernel context (i.e. not interrupt context).
* We retrieve the unifi context pointer and call the main UniFi
* interrupt handler.
*
* Arguments:
* fdev SDIO context pointer
*
* Returns:
* None.
* ---------------------------------------------------------------------------
*/
static CsrSdioInterruptDsrCallback
uf_sdio_int_handler(CsrSdioFunction *sdio_ctx)
{
return uf_sdio_dsr_handler;
} /* uf_sdio_int_handler() */
static CsrSdioFunctionId unifi_ids[] =
{
{
.manfId = SDIO_MANF_ID_CSR,
.cardId = SDIO_CARD_ID_UNIFI_3,
.sdioFunction = SDIO_WLAN_FUNC_ID_UNIFI_3,
.sdioInterface = CSR_SDIO_ANY_SDIO_INTERFACE,
},
{
.manfId = SDIO_MANF_ID_CSR,
.cardId = SDIO_CARD_ID_UNIFI_4,
.sdioFunction = SDIO_WLAN_FUNC_ID_UNIFI_4,
.sdioInterface = CSR_SDIO_ANY_SDIO_INTERFACE,
}
};
/*
* Structure to register with the glue layer.
*/
static CsrSdioFunctionDriver unifi_sdioFunction_drv =
{
.inserted = uf_sdio_inserted,
.removed = uf_sdio_removed,
.intr = uf_sdio_int_handler,
.suspend = uf_lx_suspend,
.resume = uf_lx_resume,
.ids = unifi_ids,
.idsCount = sizeof(unifi_ids) / sizeof(unifi_ids[0])
};
/*
* ---------------------------------------------------------------------------
* uf_sdio_load
* uf_sdio_unload
*
* These functions are called from the main module load and unload
* functions. They perform the appropriate operations for the monolithic
* driver.
*
* Arguments:
* None.
*
* Returns:
* None.
* ---------------------------------------------------------------------------
*/
int __init
uf_sdio_load(void)
{
CsrResult csrResult;
csrResult = CsrSdioFunctionDriverRegister(&unifi_sdioFunction_drv);
if (csrResult != CSR_RESULT_SUCCESS) {
unifi_error(NULL, "Failed to register UniFi SDIO driver: csrResult=%d\n", csrResult);
return -EIO;
}
return 0;
} /* uf_sdio_load() */
void __exit
uf_sdio_unload(void)
{
CsrSdioFunctionDriverUnregister(&unifi_sdioFunction_drv);
} /* uf_sdio_unload() */