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/*
* Copyright (c) 2014 Redpine Signals Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/firmware.h>
#include <net/rsi_91x.h>
#include "rsi_mgmt.h"
#include "rsi_common.h"
#include "rsi_coex.h"
#include "rsi_hal.h"
u32 rsi_zone_enabled = /* INFO_ZONE |
INIT_ZONE |
MGMT_TX_ZONE |
MGMT_RX_ZONE |
DATA_TX_ZONE |
DATA_RX_ZONE |
FSM_ZONE |
ISR_ZONE | */
ERR_ZONE |
0;
EXPORT_SYMBOL_GPL(rsi_zone_enabled);
#ifdef CONFIG_RSI_COEX
static struct rsi_proto_ops g_proto_ops = {
.coex_send_pkt = rsi_coex_send_pkt,
.get_host_intf = rsi_get_host_intf,
.set_bt_context = rsi_set_bt_context,
};
#endif
/**
* rsi_dbg() - This function outputs informational messages.
* @zone: Zone of interest for output message.
* @fmt: printf-style format for output message.
*
* Return: none
*/
void rsi_dbg(u32 zone, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
if (zone & rsi_zone_enabled)
pr_info("%pV", &vaf);
va_end(args);
}
EXPORT_SYMBOL_GPL(rsi_dbg);
static char *opmode_str(int oper_mode)
{
switch (oper_mode) {
case DEV_OPMODE_WIFI_ALONE:
return "Wi-Fi alone";
case DEV_OPMODE_BT_ALONE:
return "BT EDR alone";
case DEV_OPMODE_BT_LE_ALONE:
return "BT LE alone";
case DEV_OPMODE_BT_DUAL:
return "BT Dual";
case DEV_OPMODE_STA_BT:
return "Wi-Fi STA + BT EDR";
case DEV_OPMODE_STA_BT_LE:
return "Wi-Fi STA + BT LE";
case DEV_OPMODE_STA_BT_DUAL:
return "Wi-Fi STA + BT DUAL";
case DEV_OPMODE_AP_BT:
return "Wi-Fi AP + BT EDR";
case DEV_OPMODE_AP_BT_DUAL:
return "Wi-Fi AP + BT DUAL";
}
return "Unknown";
}
void rsi_print_version(struct rsi_common *common)
{
rsi_dbg(ERR_ZONE, "================================================\n");
rsi_dbg(ERR_ZONE, "================ RSI Version Info ==============\n");
rsi_dbg(ERR_ZONE, "================================================\n");
rsi_dbg(ERR_ZONE, "FW Version\t: %d.%d.%d\n",
common->lmac_ver.major, common->lmac_ver.minor,
common->lmac_ver.release_num);
rsi_dbg(ERR_ZONE, "Operating mode\t: %d [%s]",
common->oper_mode, opmode_str(common->oper_mode));
rsi_dbg(ERR_ZONE, "Firmware file\t: %s", common->priv->fw_file_name);
rsi_dbg(ERR_ZONE, "================================================\n");
}
/**
* rsi_prepare_skb() - This function prepares the skb.
* @common: Pointer to the driver private structure.
* @buffer: Pointer to the packet data.
* @pkt_len: Length of the packet.
* @extended_desc: Extended descriptor.
*
* Return: Successfully skb.
*/
static struct sk_buff *rsi_prepare_skb(struct rsi_common *common,
u8 *buffer,
u32 pkt_len,
u8 extended_desc)
{
struct sk_buff *skb = NULL;
u8 payload_offset;
if (WARN(!pkt_len, "%s: Dummy pkt received", __func__))
return NULL;
if (pkt_len > (RSI_RCV_BUFFER_LEN * 4)) {
rsi_dbg(ERR_ZONE, "%s: Pkt size > max rx buf size %d\n",
__func__, pkt_len);
pkt_len = RSI_RCV_BUFFER_LEN * 4;
}
pkt_len -= extended_desc;
skb = dev_alloc_skb(pkt_len + FRAME_DESC_SZ);
if (skb == NULL)
return NULL;
payload_offset = (extended_desc + FRAME_DESC_SZ);
skb_put(skb, pkt_len);
memcpy((skb->data), (buffer + payload_offset), skb->len);
return skb;
}
/**
* rsi_read_pkt() - This function reads frames from the card.
* @common: Pointer to the driver private structure.
* @rcv_pkt: Received pkt.
* @rcv_pkt_len: Received pkt length. In case of USB it is 0.
*
* Return: 0 on success, -1 on failure.
*/
int rsi_read_pkt(struct rsi_common *common, u8 *rx_pkt, s32 rcv_pkt_len)
{
u8 *frame_desc = NULL, extended_desc = 0;
u32 index, length = 0, queueno = 0;
u16 actual_length = 0, offset;
struct sk_buff *skb = NULL;
#ifdef CONFIG_RSI_COEX
u8 bt_pkt_type;
#endif
index = 0;
do {
frame_desc = &rx_pkt[index];
actual_length = *(u16 *)&frame_desc[0];
offset = *(u16 *)&frame_desc[2];
queueno = rsi_get_queueno(frame_desc, offset);
length = rsi_get_length(frame_desc, offset);
/* Extended descriptor is valid for WLAN queues only */
if (queueno == RSI_WIFI_DATA_Q || queueno == RSI_WIFI_MGMT_Q)
extended_desc = rsi_get_extended_desc(frame_desc,
offset);
switch (queueno) {
case RSI_COEX_Q:
#ifdef CONFIG_RSI_COEX
if (common->coex_mode > 1)
rsi_coex_recv_pkt(common, frame_desc + offset);
else
#endif
rsi_mgmt_pkt_recv(common,
(frame_desc + offset));
break;
case RSI_WIFI_DATA_Q:
skb = rsi_prepare_skb(common,
(frame_desc + offset),
length,
extended_desc);
if (skb == NULL)
goto fail;
rsi_indicate_pkt_to_os(common, skb);
break;
case RSI_WIFI_MGMT_Q:
rsi_mgmt_pkt_recv(common, (frame_desc + offset));
break;
#ifdef CONFIG_RSI_COEX
case RSI_BT_MGMT_Q:
case RSI_BT_DATA_Q:
#define BT_RX_PKT_TYPE_OFST 14
#define BT_CARD_READY_IND 0x89
bt_pkt_type = frame_desc[offset + BT_RX_PKT_TYPE_OFST];
if (bt_pkt_type == BT_CARD_READY_IND) {
rsi_dbg(INFO_ZONE, "BT Card ready recvd\n");
if (rsi_bt_ops.attach(common, &g_proto_ops))
rsi_dbg(ERR_ZONE,
"Failed to attach BT module\n");
} else {
if (common->bt_adapter)
rsi_bt_ops.recv_pkt(common->bt_adapter,
frame_desc + offset);
}
break;
#endif
default:
rsi_dbg(ERR_ZONE, "%s: pkt from invalid queue: %d\n",
__func__, queueno);
goto fail;
}
index += actual_length;
rcv_pkt_len -= actual_length;
} while (rcv_pkt_len > 0);
return 0;
fail:
return -EINVAL;
}
EXPORT_SYMBOL_GPL(rsi_read_pkt);
/**
* rsi_tx_scheduler_thread() - This function is a kernel thread to send the
* packets to the device.
* @common: Pointer to the driver private structure.
*
* Return: None.
*/
static void rsi_tx_scheduler_thread(struct rsi_common *common)
{
struct rsi_hw *adapter = common->priv;
u32 timeout = EVENT_WAIT_FOREVER;
do {
if (adapter->determine_event_timeout)
timeout = adapter->determine_event_timeout(adapter);
rsi_wait_event(&common->tx_thread.event, timeout);
rsi_reset_event(&common->tx_thread.event);
if (common->init_done)
rsi_core_qos_processor(common);
} while (atomic_read(&common->tx_thread.thread_done) == 0);
complete_and_exit(&common->tx_thread.completion, 0);
}
#ifdef CONFIG_RSI_COEX
enum rsi_host_intf rsi_get_host_intf(void *priv)
{
struct rsi_common *common = (struct rsi_common *)priv;
return common->priv->rsi_host_intf;
}
void rsi_set_bt_context(void *priv, void *bt_context)
{
struct rsi_common *common = (struct rsi_common *)priv;
common->bt_adapter = bt_context;
}
#endif
/**
* rsi_91x_init() - This function initializes os interface operations.
* @oper_mode: One of DEV_OPMODE_*.
*
* Return: Pointer to the adapter structure on success, NULL on failure .
*/
struct rsi_hw *rsi_91x_init(u16 oper_mode)
{
struct rsi_hw *adapter = NULL;
struct rsi_common *common = NULL;
u8 ii = 0;
adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
if (!adapter)
return NULL;
adapter->priv = kzalloc(sizeof(*common), GFP_KERNEL);
if (adapter->priv == NULL) {
rsi_dbg(ERR_ZONE, "%s: Failed in allocation of memory\n",
__func__);
kfree(adapter);
return NULL;
} else {
common = adapter->priv;
common->priv = adapter;
}
for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
skb_queue_head_init(&common->tx_queue[ii]);
rsi_init_event(&common->tx_thread.event);
mutex_init(&common->mutex);
mutex_init(&common->tx_lock);
mutex_init(&common->rx_lock);
mutex_init(&common->tx_bus_mutex);
if (rsi_create_kthread(common,
&common->tx_thread,
rsi_tx_scheduler_thread,
"Tx-Thread")) {
rsi_dbg(ERR_ZONE, "%s: Unable to init tx thrd\n", __func__);
goto err;
}
rsi_default_ps_params(adapter);
init_bgscan_params(common);
spin_lock_init(&adapter->ps_lock);
timer_setup(&common->roc_timer, rsi_roc_timeout, 0);
init_completion(&common->wlan_init_completion);
adapter->device_model = RSI_DEV_9113;
common->oper_mode = oper_mode;
/* Determine coex mode */
switch (common->oper_mode) {
case DEV_OPMODE_STA_BT_DUAL:
case DEV_OPMODE_STA_BT:
case DEV_OPMODE_STA_BT_LE:
case DEV_OPMODE_BT_ALONE:
case DEV_OPMODE_BT_LE_ALONE:
case DEV_OPMODE_BT_DUAL:
common->coex_mode = 2;
break;
case DEV_OPMODE_AP_BT_DUAL:
case DEV_OPMODE_AP_BT:
common->coex_mode = 4;
break;
case DEV_OPMODE_WIFI_ALONE:
common->coex_mode = 1;
break;
default:
common->oper_mode = 1;
common->coex_mode = 1;
}
rsi_dbg(INFO_ZONE, "%s: oper_mode = %d, coex_mode = %d\n",
__func__, common->oper_mode, common->coex_mode);
adapter->device_model = RSI_DEV_9113;
#ifdef CONFIG_RSI_COEX
if (common->coex_mode > 1) {
if (rsi_coex_attach(common)) {
rsi_dbg(ERR_ZONE, "Failed to init coex module\n");
goto err;
}
}
#endif
common->init_done = true;
return adapter;
err:
kfree(common);
kfree(adapter);
return NULL;
}
EXPORT_SYMBOL_GPL(rsi_91x_init);
/**
* rsi_91x_deinit() - This function de-intializes os intf operations.
* @adapter: Pointer to the adapter structure.
*
* Return: None.
*/
void rsi_91x_deinit(struct rsi_hw *adapter)
{
struct rsi_common *common = adapter->priv;
u8 ii;
rsi_dbg(INFO_ZONE, "%s: Performing deinit os ops\n", __func__);
rsi_kill_thread(&common->tx_thread);
for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
skb_queue_purge(&common->tx_queue[ii]);
#ifdef CONFIG_RSI_COEX
if (common->coex_mode > 1) {
if (common->bt_adapter) {
rsi_bt_ops.detach(common->bt_adapter);
common->bt_adapter = NULL;
}
rsi_coex_detach(common);
}
#endif
common->init_done = false;
kfree(common);
kfree(adapter->rsi_dev);
kfree(adapter);
}
EXPORT_SYMBOL_GPL(rsi_91x_deinit);
/**
* rsi_91x_hal_module_init() - This function is invoked when the module is
* loaded into the kernel.
* It registers the client driver.
* @void: Void.
*
* Return: 0 on success, -1 on failure.
*/
static int rsi_91x_hal_module_init(void)
{
rsi_dbg(INIT_ZONE, "%s: Module init called\n", __func__);
return 0;
}
/**
* rsi_91x_hal_module_exit() - This function is called at the time of
* removing/unloading the module.
* It unregisters the client driver.
* @void: Void.
*
* Return: None.
*/
static void rsi_91x_hal_module_exit(void)
{
rsi_dbg(INIT_ZONE, "%s: Module exit called\n", __func__);
}
module_init(rsi_91x_hal_module_init);
module_exit(rsi_91x_hal_module_exit);
MODULE_AUTHOR("Redpine Signals Inc");
MODULE_DESCRIPTION("Station driver for RSI 91x devices");
MODULE_SUPPORTED_DEVICE("RSI-91x");
MODULE_VERSION("0.1");
MODULE_LICENSE("Dual BSD/GPL");
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