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
whc_update_di(struct whc * whc,int idx)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
whc_wusbhc_start(struct wusbhc * wusbhc)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
whc_wusbhc_stop(struct wusbhc * wusbhc,int delay)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
whc_mmcie_add(struct wusbhc * wusbhc,u8 interval,u8 repeat_cnt,u8 handle,struct wuie_hdr * wuie)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
whc_mmcie_rm(struct wusbhc * wusbhc,u8 handle)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
whc_bwa_set(struct wusbhc * wusbhc,s8 stream_index,const struct uwb_mas_bm * mas_bm)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
whc_dev_info_set(struct wusbhc * wusbhc,struct wusb_dev * wusb_dev)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 */
whc_set_num_dnts(struct wusbhc * wusbhc,u8 interval,u8 slots)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
whc_set_key(struct whc * whc,u8 key_index,uint32_t tkid,const void * key,size_t key_size,bool is_gtk)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 */
whc_set_ptk(struct wusbhc * wusbhc,u8 port_idx,u32 tkid,const void * ptk,size_t key_size)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 */
whc_set_gtk(struct wusbhc * wusbhc,u32 tkid,const void * gtk,size_t key_size)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
whc_set_cluster_id(struct whc * whc,u8 bcid)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 }
222