drivers/usb/host/whci/wusb.c

   1 /*
   2  * Wireless Host Controller (WHC) WUSB operations.
   3  *
   4  * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 #include <linux/kernel.h>
  19 #include <linux/uwb/umc.h>
  20
  21 #include "../../wusbcore/wusbhc.h"
  22
  23 #include "whcd.h"
  24
  25 static int whc_update_di(struct whc *whc, int idx)
  26 {
  27         int offset = idx / 32;
  28         u32 bit = 1 << (idx % 32);
  29
  30         le_writel(bit, whc->base + WUSBDIBUPDATED + offset);
  31
  32         return whci_wait_for(&whc->umc->dev,
  33                              whc->base + WUSBDIBUPDATED + offset, bit, 0,
  34                              100, "DI update");
  35 }
  36
  37 /*
  38  * WHCI starts MMCs based on there being a valid GTK so these need
  39  * only start/stop the asynchronous and periodic schedules and send a
  40  * channel stop command.
  41  */
  42
  43 int whc_wusbhc_start(struct wusbhc *wusbhc)
  44 {
  45         struct whc *whc = wusbhc_to_whc(wusbhc);
  46
  47         asl_start(whc);
  48         pzl_start(whc);
  49
  50         return 0;
  51 }
  52
  53 void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay)
  54 {
  55         struct whc *whc = wusbhc_to_whc(wusbhc);
  56         u32 stop_time, now_time;
  57         int ret;
  58
  59         pzl_stop(whc);
  60         asl_stop(whc);
  61
  62         now_time = le_readl(whc->base + WUSBTIME) & WUSBTIME_CHANNEL_TIME_MASK;
  63         stop_time = (now_time + ((delay * 8) << 7)) & 0x00ffffff;
  64         ret = whc_do_gencmd(whc, WUSBGENCMDSTS_CHAN_STOP, stop_time, NULL, 0);
  65         if (ret == 0)
  66                 msleep(delay);
  67 }
  68
  69 int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
  70                   u8 handle, struct wuie_hdr *wuie)
  71 {
  72         struct whc *whc = wusbhc_to_whc(wusbhc);
  73         u32 params;
  74
  75         params = (interval << 24)
  76                 | (repeat_cnt << 16)
  77                 | (wuie->bLength << 8)
  78                 | handle;
  79
  80         return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_ADD, params, wuie, wuie->bLength);
  81 }
  82
  83 int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
  84 {
  85         struct whc *whc = wusbhc_to_whc(wusbhc);
  86         u32 params;
  87
  88         params = handle;
  89
  90         return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_RM, params, NULL, 0);
  91 }
  92
  93 int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm)
  94 {
  95         struct whc *whc = wusbhc_to_whc(wusbhc);
  96
  97         if (stream_index >= 0)
  98                 whc_write_wusbcmd(whc, WUSBCMD_WUSBSI_MASK, WUSBCMD_WUSBSI(stream_index));
  99
 100         return whc_do_gencmd(whc, WUSBGENCMDSTS_SET_MAS, 0, (void *)mas_bm, sizeof(*mas_bm));
 101 }
 102
 103 int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
 104 {
 105         struct whc *whc = wusbhc_to_whc(wusbhc);
 106         int idx = wusb_dev->port_idx;
 107         struct di_buf_entry *di = &whc->di_buf[idx];
 108         int ret;
 109
 110         mutex_lock(&whc->mutex);
 111
 112         uwb_mas_bm_copy_le(di->availability_info, &wusb_dev->availability);
 113         di->addr_sec_info &= ~(WHC_DI_DISABLE | WHC_DI_DEV_ADDR_MASK);
 114         di->addr_sec_info |= WHC_DI_DEV_ADDR(wusb_dev->addr);
 115
 116         ret = whc_update_di(whc, idx);
 117
 118         mutex_unlock(&whc->mutex);
 119
 120         return ret;
 121 }
 122
 123 /*
 124  * Set the number of Device Notification Time Slots (DNTS) and enable
 125  * device notifications.
 126  */
 127 int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
 128 {
 129         struct whc *whc = wusbhc_to_whc(wusbhc);
 130         u32 dntsctrl;
 131
 132         dntsctrl = WUSBDNTSCTRL_ACTIVE
 133                 | WUSBDNTSCTRL_INTERVAL(interval)
 134                 | WUSBDNTSCTRL_SLOTS(slots);
 135
 136         le_writel(dntsctrl, whc->base + WUSBDNTSCTRL);
 137
 138         return 0;
 139 }
 140
 141 static int whc_set_key(struct whc *whc, u8 key_index, uint32_t tkid,
 142                        const void *key, size_t key_size, bool is_gtk)
 143 {
 144         uint32_t setkeycmd;
 145         uint32_t seckey[4];
 146         int i;
 147         int ret;
 148
 149         memcpy(seckey, key, key_size);
 150         setkeycmd = WUSBSETSECKEYCMD_SET | WUSBSETSECKEYCMD_IDX(key_index);
 151         if (is_gtk)
 152                 setkeycmd |= WUSBSETSECKEYCMD_GTK;
 153
 154         le_writel(tkid, whc->base + WUSBTKID);
 155         for (i = 0; i < 4; i++)
 156                 le_writel(seckey[i], whc->base + WUSBSECKEY + 4*i);
 157         le_writel(setkeycmd, whc->base + WUSBSETSECKEYCMD);
 158
 159         ret = whci_wait_for(&whc->umc->dev, whc->base + WUSBSETSECKEYCMD,
 160                             WUSBSETSECKEYCMD_SET, 0, 100, "set key");
 161
 162         return ret;
 163 }
 164
 165 /**
 166  * whc_set_ptk - set the PTK to use for a device.
 167  *
 168  * The index into the key table for this PTK is the same as the
 169  * device's port index.
 170  */
 171 int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
 172                 const void *ptk, size_t key_size)
 173 {
 174         struct whc *whc = wusbhc_to_whc(wusbhc);
 175         struct di_buf_entry *di = &whc->di_buf[port_idx];
 176         int ret;
 177
 178         mutex_lock(&whc->mutex);
 179
 180         if (ptk) {
 181                 ret = whc_set_key(whc, port_idx, tkid, ptk, key_size, false);
 182                 if (ret)
 183                         goto out;
 184
 185                 di->addr_sec_info &= ~WHC_DI_KEY_IDX_MASK;
 186                 di->addr_sec_info |= WHC_DI_SECURE | WHC_DI_KEY_IDX(port_idx);
 187         } else
 188                 di->addr_sec_info &= ~WHC_DI_SECURE;
 189
 190         ret = whc_update_di(whc, port_idx);
 191 out:
 192         mutex_unlock(&whc->mutex);
 193         return ret;
 194 }
 195
 196 /**
 197  * whc_set_gtk - set the GTK for subsequent broadcast packets
 198  *
 199  * The GTK is stored in the last entry in the key table (the previous
 200  * N_DEVICES entries are for the per-device PTKs).
 201  */
 202 int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
 203                 const void *gtk, size_t key_size)
 204 {
 205         struct whc *whc = wusbhc_to_whc(wusbhc);
 206         int ret;
 207
 208         mutex_lock(&whc->mutex);
 209
 210         ret = whc_set_key(whc, whc->n_devices, tkid, gtk, key_size, true);
 211
 212         mutex_unlock(&whc->mutex);
 213
 214         return ret;
 215 }
 216
 217 int whc_set_cluster_id(struct whc *whc, u8 bcid)
 218 {
 219         whc_write_wusbcmd(whc, WUSBCMD_BCID_MASK, WUSBCMD_BCID(bcid));
 220         return 0;
 221 }