diff options
Diffstat (limited to 'drivers/net/wireless/rsi/rsi_91x_main.c')
| -rw-r--r-- | drivers/net/wireless/rsi/rsi_91x_main.c | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/drivers/net/wireless/rsi/rsi_91x_main.c b/drivers/net/wireless/rsi/rsi_91x_main.c new file mode 100644 index 000000000..fe8aed58a --- /dev/null +++ b/drivers/net/wireless/rsi/rsi_91x_main.c @@ -0,0 +1,461 @@ +/* + * 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" +#include "rsi_usb.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. + * @rx_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]; + if (!rcv_pkt_len && offset > + RSI_MAX_RX_USB_PKT_SIZE - FRAME_DESC_SZ) + goto fail; + + 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 (common->fsm_state == FSM_MAC_INIT_DONE) + rsi_attach_bt(common); + else + common->bt_defer_attach = true; + } 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 + +void rsi_attach_bt(struct rsi_common *common) +{ +#ifdef CONFIG_RSI_COEX + if (rsi_bt_ops.attach(common, &g_proto_ops)) + rsi_dbg(ERR_ZONE, + "Failed to attach BT module\n"); +#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"); + rsi_kill_thread(&common->tx_thread); + 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"); |