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/init.h>
  20 #include <linux/uwb/umc.h>
  21 #define D_LOCAL 1
  22 #include <linux/uwb/debug.h>
  23
  24 #include "../../wusbcore/wusbhc.h"
  25
  26 #include "whcd.h"
  27
  28 #if D_LOCAL >= 1
  29 static void dump_di(struct whc *whc, int idx)
  30 {
  31         struct di_buf_entry *di = &whc->di_buf[idx];
  32         struct device *dev = &whc->umc->dev;
  33         char buf[128];
  34
  35         bitmap_scnprintf(buf, sizeof(buf), (unsigned long *)di->availability_info, UWB_NUM_MAS);
  36
  37         d_printf(1, dev, "DI[%d]\n", idx);
  38         d_printf(1, dev, "  availability: %s\n", buf);
  39         d_printf(1, dev, "  %c%c key idx: %d dev addr: %d\n",
  40                  (di->addr_sec_info & WHC_DI_SECURE) ? 'S' : ' ',
  41                  (di->addr_sec_info & WHC_DI_DISABLE) ? 'D' : ' ',
  42                  (di->addr_sec_info & WHC_DI_KEY_IDX_MASK) >> 8,
  43                  (di->addr_sec_info & WHC_DI_DEV_ADDR_MASK));
  44 }
  45 #else
  46 static inline void dump_di(struct whc *whc, int idx)
  47 {
  48 }
  49 #endif
  50
  51 static int whc_update_di(struct whc *whc, int idx)
  52 {
  53         int offset = idx / 32;
  54         u32 bit = 1 << (idx % 32);
  55
  56         dump_di(whc, idx);
  57
  58         le_writel(bit, whc->base + WUSBDIBUPDATED + offset);
  59
  60         return whci_wait_for(&whc->umc->dev,
  61                              whc->base + WUSBDIBUPDATED + offset, bit, 0,
  62                              100, "DI update");
  63 }
  64
  65 /*
  66  * WHCI starts MMCs based on there being a valid GTK so these need
  67  * only start/stop the asynchronous and periodic schedules and send a
  68  * channel stop command.
  69  */
  70
  71 int whc_wusbhc_start(struct wusbhc *wusbhc)
  72 {
  73         struct whc *whc = wusbhc_to_whc(wusbhc);
  74
  75         asl_start(whc);
  76         pzl_start(whc);
  77
  78         return 0;
  79 }
  80
  81 void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay)
  82 {
  83         struct whc *whc = wusbhc_to_whc(wusbhc);
  84         u32 stop_time, now_time;
  85         int ret;
  86
  87         pzl_stop(whc);
  88         asl_stop(whc);
  89
  90         now_time = le_readl(whc->base + WUSBTIME) & WUSBTIME_CHANNEL_TIME_MASK;
  91         stop_time = (now_time + ((delay * 8) << 7)) & 0x00ffffff;
  92         ret = whc_do_gencmd(whc, WUSBGENCMDSTS_CHAN_STOP, stop_time, NULL, 0);
  93         if (ret == 0)
  94                 msleep(delay);
  95 }
  96
  97 int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
  98                   u8 handle, struct wuie_hdr *wuie)
  99 {
 100         struct whc *whc = wusbhc_to_whc(wusbhc);
 101         u32 params;
 102
 103         params = (interval << 24)
 104                 | (repeat_cnt << 16)
 105                 | (wuie->bLength << 8)
 106                 | handle;
 107
 108         return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_ADD, params, wuie, wuie->bLength);
 109 }
 110
 111 int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
 112 {
 113         struct whc *whc = wusbhc_to_whc(wusbhc);
 114         u32 params;
 115
 116         params = handle;
 117
 118         return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_RM, params, NULL, 0);
 119 }
 120
 121 int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm)
 122 {
 123         struct whc *whc = wusbhc_to_whc(wusbhc);
 124
 125         if (stream_index >= 0)
 126                 whc_write_wusbcmd(whc, WUSBCMD_WUSBSI_MASK, WUSBCMD_WUSBSI(stream_index));
 127
 128         return whc_do_gencmd(whc, WUSBGENCMDSTS_SET_MAS, 0, (void *)mas_bm, sizeof(*mas_bm));
 129 }
 130
 131 int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
 132 {
 133         struct whc *whc = wusbhc_to_whc(wusbhc);
 134         int idx = wusb_dev->port_idx;
 135         struct di_buf_entry *di = &whc->di_buf[idx];
 136         int ret;
 137
 138         mutex_lock(&whc->mutex);
 139
 140         uwb_mas_bm_copy_le(di->availability_info, &wusb_dev->availability);
 141         di->addr_sec_info &= ~(WHC_DI_DISABLE | WHC_DI_DEV_ADDR_MASK);
 142         di->addr_sec_info |= WHC_DI_DEV_ADDR(wusb_dev->addr);
 143
 144         ret = whc_update_di(whc, idx);
 145
 146         mutex_unlock(&whc->mutex);
 147
 148         return ret;
 149 }
 150
 151 /*
 152  * Set the number of Device Notification Time Slots (DNTS) and enable
 153  * device notifications.
 154  */
 155 int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
 156 {
 157         struct whc *whc = wusbhc_to_whc(wusbhc);
 158         u32 dntsctrl;
 159
 160         dntsctrl = WUSBDNTSCTRL_ACTIVE
 161                 | WUSBDNTSCTRL_INTERVAL(interval)
 162                 | WUSBDNTSCTRL_SLOTS(slots);
 163
 164         le_writel(dntsctrl, whc->base + WUSBDNTSCTRL);
 165
 166         return 0;
 167 }
 168
 169 static int whc_set_key(struct whc *whc, u8 key_index, uint32_t tkid,
 170                        const void *key, size_t key_size, bool is_gtk)
 171 {
 172         uint32_t setkeycmd;
 173         uint32_t seckey[4];
 174         int i;
 175         int ret;
 176
 177         memcpy(seckey, key, key_size);
 178         setkeycmd = WUSBSETSECKEYCMD_SET | WUSBSETSECKEYCMD_IDX(key_index);
 179         if (is_gtk)
 180                 setkeycmd |= WUSBSETSECKEYCMD_GTK;
 181
 182         le_writel(tkid, whc->base + WUSBTKID);
 183         for (i = 0; i < 4; i++)
 184                 le_writel(seckey[i], whc->base + WUSBSECKEY + 4*i);
 185         le_writel(setkeycmd, whc->base + WUSBSETSECKEYCMD);
 186
 187         ret = whci_wait_for(&whc->umc->dev, whc->base + WUSBSETSECKEYCMD,
 188                             WUSBSETSECKEYCMD_SET, 0, 100, "set key");
 189
 190         return ret;
 191 }
 192
 193 /**
 194  * whc_set_ptk - set the PTK to use for a device.
 195  *
 196  * The index into the key table for this PTK is the same as the
 197  * device's port index.
 198  */
 199 int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
 200                 const void *ptk, size_t key_size)
 201 {
 202         struct whc *whc = wusbhc_to_whc(wusbhc);
 203         struct di_buf_entry *di = &whc->di_buf[port_idx];
 204         int ret;
 205
 206         mutex_lock(&whc->mutex);
 207
 208         if (ptk) {
 209                 ret = whc_set_key(whc, port_idx, tkid, ptk, key_size, false);
 210                 if (ret)
 211                         goto out;
 212
 213                 di->addr_sec_info &= ~WHC_DI_KEY_IDX_MASK;
 214                 di->addr_sec_info |= WHC_DI_SECURE | WHC_DI_KEY_IDX(port_idx);
 215         } else
 216                 di->addr_sec_info &= ~WHC_DI_SECURE;
 217
 218         ret = whc_update_di(whc, port_idx);
 219 out:
 220         mutex_unlock(&whc->mutex);
 221         return ret;
 222 }
 223
 224 /**
 225  * whc_set_gtk - set the GTK for subsequent broadcast packets
 226  *
 227  * The GTK is stored in the last entry in the key table (the previous
 228  * N_DEVICES entries are for the per-device PTKs).
 229  */
 230 int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
 231                 const void *gtk, size_t key_size)
 232 {
 233         struct whc *whc = wusbhc_to_whc(wusbhc);
 234         int ret;
 235
 236         mutex_lock(&whc->mutex);
 237
 238         ret = whc_set_key(whc, whc->n_devices, tkid, gtk, key_size, true);
 239
 240         mutex_unlock(&whc->mutex);
 241
 242         return ret;
 243 }
 244
 245 int whc_set_cluster_id(struct whc *whc, u8 bcid)
 246 {
 247         whc_write_wusbcmd(whc, WUSBCMD_BCID_MASK, WUSBCMD_BCID(bcid));
 248         return 0;
 249 }