diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1251_rx.c')
| -rw-r--r-- | drivers/net/wireless/wl12xx/wl1251_rx.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1251_rx.c b/drivers/net/wireless/wl12xx/wl1251_rx.c deleted file mode 100644 index 1b6294b3b996..000000000000 --- a/drivers/net/wireless/wl12xx/wl1251_rx.c +++ /dev/null @@ -1,192 +0,0 @@ -/* - * This file is part of wl1251 - * - * Copyright (c) 1998-2007 Texas Instruments Incorporated - * Copyright (C) 2008 Nokia Corporation - * - * Contact: Kalle Valo <kalle.valo@nokia.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 St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#include <linux/skbuff.h> -#include <linux/gfp.h> -#include <net/mac80211.h> - -#include "wl1251.h" -#include "wl1251_reg.h" -#include "wl1251_io.h" -#include "wl1251_rx.h" -#include "wl1251_cmd.h" -#include "wl1251_acx.h" - -static void wl1251_rx_header(struct wl1251 *wl, - struct wl1251_rx_descriptor *desc) -{ - u32 rx_packet_ring_addr; - - rx_packet_ring_addr = wl->data_path->rx_packet_ring_addr; - if (wl->rx_current_buffer) - rx_packet_ring_addr += wl->data_path->rx_packet_ring_chunk_size; - - wl1251_mem_read(wl, rx_packet_ring_addr, desc, sizeof(*desc)); -} - -static void wl1251_rx_status(struct wl1251 *wl, - struct wl1251_rx_descriptor *desc, - struct ieee80211_rx_status *status, - u8 beacon) -{ - u64 mactime; - int ret; - - memset(status, 0, sizeof(struct ieee80211_rx_status)); - - status->band = IEEE80211_BAND_2GHZ; - status->mactime = desc->timestamp; - - /* - * The rx status timestamp is a 32 bits value while the TSF is a - * 64 bits one. - * For IBSS merging, TSF is mandatory, so we have to get it - * somehow, so we ask for ACX_TSF_INFO. - * That could be moved to the get_tsf() hook, but unfortunately, - * this one must be atomic, while our SPI routines can sleep. - */ - if ((wl->bss_type == BSS_TYPE_IBSS) && beacon) { - ret = wl1251_acx_tsf_info(wl, &mactime); - if (ret == 0) - status->mactime = mactime; - } - - status->signal = desc->rssi; - - /* - * FIXME: guessing that snr needs to be divided by two, otherwise - * the values don't make any sense - */ - wl->noise = desc->rssi - desc->snr / 2; - - status->freq = ieee80211_channel_to_frequency(desc->channel); - - status->flag |= RX_FLAG_TSFT; - - if (desc->flags & RX_DESC_ENCRYPTION_MASK) { - status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED; - - if (likely(!(desc->flags & RX_DESC_DECRYPT_FAIL))) - status->flag |= RX_FLAG_DECRYPTED; - - if (unlikely(desc->flags & RX_DESC_MIC_FAIL)) - status->flag |= RX_FLAG_MMIC_ERROR; - } - - if (unlikely(!(desc->flags & RX_DESC_VALID_FCS))) - status->flag |= RX_FLAG_FAILED_FCS_CRC; - - - /* FIXME: set status->rate_idx */ -} - -static void wl1251_rx_body(struct wl1251 *wl, - struct wl1251_rx_descriptor *desc) -{ - struct sk_buff *skb; - struct ieee80211_rx_status status; - u8 *rx_buffer, beacon = 0; - u16 length, *fc; - u32 curr_id, last_id_inc, rx_packet_ring_addr; - - length = WL1251_RX_ALIGN(desc->length - PLCP_HEADER_LENGTH); - curr_id = (desc->flags & RX_DESC_SEQNUM_MASK) >> RX_DESC_PACKETID_SHIFT; - last_id_inc = (wl->rx_last_id + 1) % (RX_MAX_PACKET_ID + 1); - - if (last_id_inc != curr_id) { - wl1251_warning("curr ID:%d, last ID inc:%d", - curr_id, last_id_inc); - wl->rx_last_id = curr_id; - } else { - wl->rx_last_id = last_id_inc; - } - - rx_packet_ring_addr = wl->data_path->rx_packet_ring_addr + - sizeof(struct wl1251_rx_descriptor) + 20; - if (wl->rx_current_buffer) - rx_packet_ring_addr += wl->data_path->rx_packet_ring_chunk_size; - - skb = __dev_alloc_skb(length, GFP_KERNEL); - if (!skb) { - wl1251_error("Couldn't allocate RX frame"); - return; - } - - rx_buffer = skb_put(skb, length); - wl1251_mem_read(wl, rx_packet_ring_addr, rx_buffer, length); - - /* The actual lenght doesn't include the target's alignment */ - skb->len = desc->length - PLCP_HEADER_LENGTH; - - fc = (u16 *)skb->data; - - if ((*fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) - beacon = 1; - - wl1251_rx_status(wl, desc, &status, beacon); - - wl1251_debug(DEBUG_RX, "rx skb 0x%p: %d B %s", skb, skb->len, - beacon ? "beacon" : ""); - - memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); - ieee80211_rx_ni(wl->hw, skb); -} - -static void wl1251_rx_ack(struct wl1251 *wl) -{ - u32 data, addr; - - if (wl->rx_current_buffer) { - addr = ACX_REG_INTERRUPT_TRIG_H; - data = INTR_TRIG_RX_PROC1; - } else { - addr = ACX_REG_INTERRUPT_TRIG; - data = INTR_TRIG_RX_PROC0; - } - - wl1251_reg_write32(wl, addr, data); - - /* Toggle buffer ring */ - wl->rx_current_buffer = !wl->rx_current_buffer; -} - - -void wl1251_rx(struct wl1251 *wl) -{ - struct wl1251_rx_descriptor *rx_desc; - - if (wl->state != WL1251_STATE_ON) - return; - - rx_desc = wl->rx_descriptor; - - /* We first read the frame's header */ - wl1251_rx_header(wl, rx_desc); - - /* Now we can read the body */ - wl1251_rx_body(wl, rx_desc); - - /* Finally, we need to ACK the RX */ - wl1251_rx_ack(wl); -} |