diff options
Diffstat (limited to 'carl9170fw/carlfw/src/hostif.c')
| -rw-r--r-- | carl9170fw/carlfw/src/hostif.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/carl9170fw/carlfw/src/hostif.c b/carl9170fw/carlfw/src/hostif.c deleted file mode 100644 index e445d5f..0000000 --- a/carl9170fw/carlfw/src/hostif.c +++ /dev/null @@ -1,165 +0,0 @@ -/* - * carl9170 firmware - used by the ar9170 wireless device - * - * Host interface routines - * - * Copyright (c) 2000-2005 ZyDAS Technology Corporation - * Copyright (c) 2007-2009 Atheros Communications, Inc. - * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> - * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - */ - -#include "carl9170.h" -#include "hostif.h" -#include "printf.h" -#include "wl.h" - -static bool length_check(struct dma_desc *desc) -{ - volatile struct carl9170_tx_superframe *super = __get_super(desc); - - if (unlikely(desc->totalLen < sizeof(struct carl9170_tx_superdesc))) - return false; - - /* - * check if the DMA is complete, or clipped. - * - * NB: The hardware aligns the descriptor length to - * a 4 byte boundary. This makes the direct comparison - * difficult, or unnecessary complex for a hot-path. - */ - if (unlikely(super->s.len > desc->totalLen)) - return false; - - return true; -} - -static void handle_download(void) -{ - struct dma_desc *desc; - - /* - * Under normal conditions, all completed descs should have - * the AR9170_OWN_BITS_SE status flag set. - * However there seems to be a undocumented case where the flag - * is _SW ( handle_download_exception ) - */ - - for_each_desc_not_bits(desc, &fw.pta.down_queue, AR9170_OWN_BITS_HW) { - if (unlikely((length_check(desc) == false))) { - /* - * There is no easy way of telling what was lost. - * - * Therefore we just reclaim the data. - * The driver has to have some sort frame - * timeout mechanism. - */ - - wlan_tx_complete(__get_super(desc), false); - dma_reclaim(&fw.pta.down_queue, desc); - down_trigger(); - } else { - wlan_tx(desc); - } - } - -#ifdef CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT - xorl(AR9170_GPIO_REG_PORT_DATA, 2); -#endif /* CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT */ -} - -static void handle_upload(void) -{ - struct dma_desc *desc; - - for_each_desc_not_bits(desc, &fw.pta.up_queue, AR9170_OWN_BITS_HW) { - /* - * BIG FAT NOTE: - * - * DO NOT compare the descriptor addresses. - */ - if (DESC_PAYLOAD(desc) == (void *) &dma_mem.reserved.rsp) { - fw.usb.int_desc = desc; - fw.usb.int_desc_available = 1; - } else { - dma_reclaim(&fw.wlan.rx_queue, desc); - wlan_trigger(AR9170_DMA_TRIGGER_RXQ); - } - } - -#ifdef CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT - xorl(AR9170_GPIO_REG_PORT_DATA, 2); -#endif /* CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT */ -} - -static void handle_download_exception(void) -{ - struct dma_desc *desc, *target; - - /* actually, the queue should be stopped by now? */ - usb_stop_down_queue(); - - target = (void *)((get(AR9170_PTA_REG_DN_CURR_ADDRH) << 16) | - get(AR9170_PTA_REG_DN_CURR_ADDRL)); - - /* - * Put "forgotten" packets from the head of the queue, back - * to the current position - */ - __while_desc_bits(desc, &fw.pta.down_queue, AR9170_OWN_BITS_HW) { - if (desc == target) - break; - - dma_reclaim(&fw.pta.down_queue, - dma_unlink_head(&fw.pta.down_queue)); - } - - __for_each_desc_continue(desc, &fw.pta.down_queue) { - if ((desc->status & AR9170_OWN_BITS) == AR9170_OWN_BITS_SW) - dma_fix_downqueue(desc); - } - - - usb_start_down_queue(); - - down_trigger(); -} - -/* handle interrupts from DMA chip */ -void handle_host_interface(void) -{ - uint32_t pta_int; - - pta_int = get(AR9170_PTA_REG_INT_FLAG); - -#define HANDLER(intr, flag, func) \ - do { \ - if ((intr & flag) != 0) { \ - func(); \ - } \ - } while (0) - - HANDLER(pta_int, AR9170_PTA_INT_FLAG_DN, handle_download); - - HANDLER(pta_int, AR9170_PTA_INT_FLAG_UP, handle_upload); - - /* This is just guesswork and MAGIC */ - pta_int = get(AR9170_PTA_REG_DMA_STATUS); - HANDLER(pta_int, 0x1, handle_download_exception); - -#undef HANDLER -} |