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222 lines
5.4 KiB
222 lines
5.4 KiB
/*
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* Wireless Host Controller (WHC) WUSB operations.
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*
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* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/uwb/umc.h>
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#include "../../wusbcore/wusbhc.h"
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#include "whcd.h"
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static int whc_update_di(struct whc *whc, int idx)
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{
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int offset = idx / 32;
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u32 bit = 1 << (idx % 32);
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le_writel(bit, whc->base + WUSBDIBUPDATED + offset);
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return whci_wait_for(&whc->umc->dev,
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whc->base + WUSBDIBUPDATED + offset, bit, 0,
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100, "DI update");
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}
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/*
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* WHCI starts MMCs based on there being a valid GTK so these need
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* only start/stop the asynchronous and periodic schedules and send a
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* channel stop command.
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*/
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int whc_wusbhc_start(struct wusbhc *wusbhc)
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{
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struct whc *whc = wusbhc_to_whc(wusbhc);
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asl_start(whc);
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pzl_start(whc);
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return 0;
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}
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void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay)
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{
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struct whc *whc = wusbhc_to_whc(wusbhc);
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u32 stop_time, now_time;
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int ret;
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pzl_stop(whc);
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asl_stop(whc);
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now_time = le_readl(whc->base + WUSBTIME) & WUSBTIME_CHANNEL_TIME_MASK;
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stop_time = (now_time + ((delay * 8) << 7)) & 0x00ffffff;
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ret = whc_do_gencmd(whc, WUSBGENCMDSTS_CHAN_STOP, stop_time, NULL, 0);
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if (ret == 0)
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msleep(delay);
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}
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int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
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u8 handle, struct wuie_hdr *wuie)
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{
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struct whc *whc = wusbhc_to_whc(wusbhc);
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u32 params;
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params = (interval << 24)
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| (repeat_cnt << 16)
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| (wuie->bLength << 8)
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| handle;
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return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_ADD, params, wuie, wuie->bLength);
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}
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int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
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{
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struct whc *whc = wusbhc_to_whc(wusbhc);
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u32 params;
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params = handle;
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return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_RM, params, NULL, 0);
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}
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int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm)
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{
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struct whc *whc = wusbhc_to_whc(wusbhc);
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if (stream_index >= 0)
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whc_write_wusbcmd(whc, WUSBCMD_WUSBSI_MASK, WUSBCMD_WUSBSI(stream_index));
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return whc_do_gencmd(whc, WUSBGENCMDSTS_SET_MAS, 0, (void *)mas_bm, sizeof(*mas_bm));
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}
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int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
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{
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struct whc *whc = wusbhc_to_whc(wusbhc);
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int idx = wusb_dev->port_idx;
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struct di_buf_entry *di = &whc->di_buf[idx];
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int ret;
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mutex_lock(&whc->mutex);
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uwb_mas_bm_copy_le(di->availability_info, &wusb_dev->availability);
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di->addr_sec_info &= ~(WHC_DI_DISABLE | WHC_DI_DEV_ADDR_MASK);
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di->addr_sec_info |= WHC_DI_DEV_ADDR(wusb_dev->addr);
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ret = whc_update_di(whc, idx);
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mutex_unlock(&whc->mutex);
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return ret;
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}
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/*
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* Set the number of Device Notification Time Slots (DNTS) and enable
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* device notifications.
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*/
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int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
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{
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struct whc *whc = wusbhc_to_whc(wusbhc);
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u32 dntsctrl;
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dntsctrl = WUSBDNTSCTRL_ACTIVE
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| WUSBDNTSCTRL_INTERVAL(interval)
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| WUSBDNTSCTRL_SLOTS(slots);
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le_writel(dntsctrl, whc->base + WUSBDNTSCTRL);
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return 0;
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}
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static int whc_set_key(struct whc *whc, u8 key_index, uint32_t tkid,
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const void *key, size_t key_size, bool is_gtk)
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{
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uint32_t setkeycmd;
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uint32_t seckey[4];
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int i;
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int ret;
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memcpy(seckey, key, key_size);
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setkeycmd = WUSBSETSECKEYCMD_SET | WUSBSETSECKEYCMD_IDX(key_index);
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if (is_gtk)
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setkeycmd |= WUSBSETSECKEYCMD_GTK;
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le_writel(tkid, whc->base + WUSBTKID);
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for (i = 0; i < 4; i++)
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le_writel(seckey[i], whc->base + WUSBSECKEY + 4*i);
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le_writel(setkeycmd, whc->base + WUSBSETSECKEYCMD);
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ret = whci_wait_for(&whc->umc->dev, whc->base + WUSBSETSECKEYCMD,
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WUSBSETSECKEYCMD_SET, 0, 100, "set key");
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return ret;
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}
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/**
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* whc_set_ptk - set the PTK to use for a device.
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*
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* The index into the key table for this PTK is the same as the
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* device's port index.
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*/
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int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
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const void *ptk, size_t key_size)
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{
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struct whc *whc = wusbhc_to_whc(wusbhc);
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struct di_buf_entry *di = &whc->di_buf[port_idx];
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int ret;
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mutex_lock(&whc->mutex);
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if (ptk) {
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ret = whc_set_key(whc, port_idx, tkid, ptk, key_size, false);
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if (ret)
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goto out;
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di->addr_sec_info &= ~WHC_DI_KEY_IDX_MASK;
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di->addr_sec_info |= WHC_DI_SECURE | WHC_DI_KEY_IDX(port_idx);
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} else
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di->addr_sec_info &= ~WHC_DI_SECURE;
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ret = whc_update_di(whc, port_idx);
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out:
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mutex_unlock(&whc->mutex);
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return ret;
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}
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/**
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* whc_set_gtk - set the GTK for subsequent broadcast packets
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*
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* The GTK is stored in the last entry in the key table (the previous
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* N_DEVICES entries are for the per-device PTKs).
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*/
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int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
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const void *gtk, size_t key_size)
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{
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struct whc *whc = wusbhc_to_whc(wusbhc);
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int ret;
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mutex_lock(&whc->mutex);
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ret = whc_set_key(whc, whc->n_devices, tkid, gtk, key_size, true);
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mutex_unlock(&whc->mutex);
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return ret;
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}
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int whc_set_cluster_id(struct whc *whc, u8 bcid)
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{
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whc_write_wusbcmd(whc, WUSBCMD_BCID_MASK, WUSBCMD_BCID(bcid));
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return 0;
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}
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