Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / usb / host / whci / wusb.c
blobf24efdebad177593639e8f41cfb7e130d9971cdf
1 /*
2 * Wireless Host Controller (WHC) WUSB operations.
4 * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
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.
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.
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/>.
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/uwb/umc.h>
22 #include "../../wusbcore/wusbhc.h"
24 #include "whcd.h"
26 static int whc_update_di(struct whc *whc, int idx)
28 int offset = idx / 32;
29 u32 bit = 1 << (idx % 32);
31 le_writel(bit, whc->base + WUSBDIBUPDATED + offset);
33 return whci_wait_for(&whc->umc->dev,
34 whc->base + WUSBDIBUPDATED + offset, bit, 0,
35 100, "DI update");
39 * WHCI starts MMCs based on there being a valid GTK so these need
40 * only start/stop the asynchronous and periodic schedules and send a
41 * channel stop command.
44 int whc_wusbhc_start(struct wusbhc *wusbhc)
46 struct whc *whc = wusbhc_to_whc(wusbhc);
48 asl_start(whc);
49 pzl_start(whc);
51 return 0;
54 void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay)
56 struct whc *whc = wusbhc_to_whc(wusbhc);
57 u32 stop_time, now_time;
58 int ret;
60 pzl_stop(whc);
61 asl_stop(whc);
63 now_time = le_readl(whc->base + WUSBTIME) & WUSBTIME_CHANNEL_TIME_MASK;
64 stop_time = (now_time + ((delay * 8) << 7)) & 0x00ffffff;
65 ret = whc_do_gencmd(whc, WUSBGENCMDSTS_CHAN_STOP, stop_time, NULL, 0);
66 if (ret == 0)
67 msleep(delay);
70 int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
71 u8 handle, struct wuie_hdr *wuie)
73 struct whc *whc = wusbhc_to_whc(wusbhc);
74 u32 params;
76 params = (interval << 24)
77 | (repeat_cnt << 16)
78 | (wuie->bLength << 8)
79 | handle;
81 return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_ADD, params, wuie, wuie->bLength);
84 int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
86 struct whc *whc = wusbhc_to_whc(wusbhc);
87 u32 params;
89 params = handle;
91 return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_RM, params, NULL, 0);
94 int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm)
96 struct whc *whc = wusbhc_to_whc(wusbhc);
98 if (stream_index >= 0)
99 whc_write_wusbcmd(whc, WUSBCMD_WUSBSI_MASK, WUSBCMD_WUSBSI(stream_index));
101 return whc_do_gencmd(whc, WUSBGENCMDSTS_SET_MAS, 0, (void *)mas_bm, sizeof(*mas_bm));
104 int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
106 struct whc *whc = wusbhc_to_whc(wusbhc);
107 int idx = wusb_dev->port_idx;
108 struct di_buf_entry *di = &whc->di_buf[idx];
109 int ret;
111 mutex_lock(&whc->mutex);
113 uwb_mas_bm_copy_le(di->availability_info, &wusb_dev->availability);
114 di->addr_sec_info &= ~(WHC_DI_DISABLE | WHC_DI_DEV_ADDR_MASK);
115 di->addr_sec_info |= WHC_DI_DEV_ADDR(wusb_dev->addr);
117 ret = whc_update_di(whc, idx);
119 mutex_unlock(&whc->mutex);
121 return ret;
125 * Set the number of Device Notification Time Slots (DNTS) and enable
126 * device notifications.
128 int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
130 struct whc *whc = wusbhc_to_whc(wusbhc);
131 u32 dntsctrl;
133 dntsctrl = WUSBDNTSCTRL_ACTIVE
134 | WUSBDNTSCTRL_INTERVAL(interval)
135 | WUSBDNTSCTRL_SLOTS(slots);
137 le_writel(dntsctrl, whc->base + WUSBDNTSCTRL);
139 return 0;
142 static int whc_set_key(struct whc *whc, u8 key_index, uint32_t tkid,
143 const void *key, size_t key_size, bool is_gtk)
145 uint32_t setkeycmd;
146 uint32_t seckey[4];
147 int i;
148 int ret;
150 memcpy(seckey, key, key_size);
151 setkeycmd = WUSBSETSECKEYCMD_SET | WUSBSETSECKEYCMD_IDX(key_index);
152 if (is_gtk)
153 setkeycmd |= WUSBSETSECKEYCMD_GTK;
155 le_writel(tkid, whc->base + WUSBTKID);
156 for (i = 0; i < 4; i++)
157 le_writel(seckey[i], whc->base + WUSBSECKEY + 4*i);
158 le_writel(setkeycmd, whc->base + WUSBSETSECKEYCMD);
160 ret = whci_wait_for(&whc->umc->dev, whc->base + WUSBSETSECKEYCMD,
161 WUSBSETSECKEYCMD_SET, 0, 100, "set key");
163 return ret;
167 * whc_set_ptk - set the PTK to use for a device.
169 * The index into the key table for this PTK is the same as the
170 * device's port index.
172 int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
173 const void *ptk, size_t key_size)
175 struct whc *whc = wusbhc_to_whc(wusbhc);
176 struct di_buf_entry *di = &whc->di_buf[port_idx];
177 int ret;
179 mutex_lock(&whc->mutex);
181 if (ptk) {
182 ret = whc_set_key(whc, port_idx, tkid, ptk, key_size, false);
183 if (ret)
184 goto out;
186 di->addr_sec_info &= ~WHC_DI_KEY_IDX_MASK;
187 di->addr_sec_info |= WHC_DI_SECURE | WHC_DI_KEY_IDX(port_idx);
188 } else
189 di->addr_sec_info &= ~WHC_DI_SECURE;
191 ret = whc_update_di(whc, port_idx);
192 out:
193 mutex_unlock(&whc->mutex);
194 return ret;
198 * whc_set_gtk - set the GTK for subsequent broadcast packets
200 * The GTK is stored in the last entry in the key table (the previous
201 * N_DEVICES entries are for the per-device PTKs).
203 int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
204 const void *gtk, size_t key_size)
206 struct whc *whc = wusbhc_to_whc(wusbhc);
207 int ret;
209 mutex_lock(&whc->mutex);
211 ret = whc_set_key(whc, whc->n_devices, tkid, gtk, key_size, true);
213 mutex_unlock(&whc->mutex);
215 return ret;
218 int whc_set_cluster_id(struct whc *whc, u8 bcid)
220 whc_write_wusbcmd(whc, WUSBCMD_BCID_MASK, WUSBCMD_BCID(bcid));
221 return 0;