/*
* Wireless Host Controller (WHC) WUSB operations.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/uwb/umc.h>
#define D_LOCAL 1
#include <linux/uwb/debug.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
#if D_LOCAL >= 1
static void dump_di(struct whc *whc, int idx)
{
struct di_buf_entry *di = &whc->di_buf[idx];
struct device *dev = &whc->umc->dev;
char buf[128];
bitmap_scnprintf(buf, sizeof(buf), (unsigned long *)di->availability_info, UWB_NUM_MAS);
d_printf(1, dev, "DI[%d]\n", idx);
d_printf(1, dev, " availability: %s\n", buf);
d_printf(1, dev, " %c%c key idx: %d dev addr: %d\n",
(di->addr_sec_info & WHC_DI_SECURE) ? 'S' : ' ',
(di->addr_sec_info & WHC_DI_DISABLE) ? 'D' : ' ',
(di->addr_sec_info & WHC_DI_KEY_IDX_MASK) >> 8,
(di->addr_sec_info & WHC_DI_DEV_ADDR_MASK));
}
#else
static inline void dump_di(struct whc *whc, int idx)
{
}
#endif
static int whc_update_di(struct whc *whc, int idx)
{
int offset = idx / 32;
u32 bit = 1 << (idx % 32);
dump_di(whc, idx);
le_writel(bit, whc->base + WUSBDIBUPDATED + offset);
return whci_wait_for(&whc->umc->dev,
whc->base + WUSBDIBUPDATED + offset, bit, 0,
100, "DI update");
}
/*
* WHCI starts and stops MMCs based on there being a valid GTK so
* these need only start/stop the asynchronous and periodic schedules.
*/
int whc_wusbhc_start(struct wusbhc *wusbhc)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
asl_start(whc);
pzl_start(whc);
return 0;
}
void whc_wusbhc_stop(struct wusbhc *wusbhc)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
pzl_stop(whc);
asl_stop(whc);
}
int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
u8 handle, struct wuie_hdr *wuie)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 params;
params = (interval << 24)
| (repeat_cnt << 16)
| (wuie->bLength << 8)
| handle;
return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_ADD, params, wuie, wuie->bLength);
}
int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 params;
params = handle;
return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_RM, params, NULL, 0);
}
int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
if (stream_index >= 0)
whc_write_wusbcmd(whc, WUSBCMD_WUSBSI_MASK, WUSBCMD_WUSBSI(stream_index));
return whc_do_gencmd(whc, WUSBGENCMDSTS_SET_MAS, 0, (void *)mas_bm, sizeof(*mas_bm));
}
int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
int idx = wusb_dev->port_idx;
struct di_buf_entry *di = &whc->di_buf[idx];
int ret;
mutex_lock(&whc->mutex);
uwb_mas_bm_copy_le(di->availability_info, &wusb_dev->availability);
di->addr_sec_info &= ~(WHC_DI_DISABLE | WHC_DI_DEV_ADDR_MASK);
di->addr_sec_info |= WHC_DI_DEV_ADDR(wusb_dev->addr);
ret = whc_update_di(whc, idx);
mutex_unlock(&whc->mutex);
return ret;
}
/*
* Set the number of Device Notification Time Slots (DNTS) and enable
* device notifications.
*/
int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 dntsctrl;
dntsctrl = WUSBDNTSCTRL_ACTIVE
| WUSBDNTSCTRL_INTERVAL(interval)
| WUSBDNTSCTRL_SLOTS(slots);
le_writel(dntsctrl, whc->base + WUSBDNTSCTRL);
return 0;
}
static int whc_set_key(struct whc *whc, u8 key_index, uint32_t tkid,
const void *key, size_t key_size, bool is_gtk)
{
uint32_t setkeycmd;
uint32_t seckey[4];
int i;
int ret;
memcpy(seckey, key, key_size);
setkeycmd = WUSBSETSECKEYCMD_SET | WUSBSETSECKEYCMD_IDX(key_index);
if (is_gtk)
setkeycmd |= WUSBSETSECKEYCMD_GTK;
le_writel(tkid, whc->base + WUSBTKID);
for (i = 0; i < 4; i++)
le_writel(seckey[i], whc->base + WUSBSECKEY + 4*i);
le_writel(setkeycmd, whc->base + WUSBSETSECKEYCMD);
ret = whci_wait_for(&whc->umc->dev, whc->base + WUSBSETSECKEYCMD,
WUSBSETSECKEYCMD_SET, 0, 100, "set key");
return ret;
}
/**
* whc_set_ptk - set the PTK to use for a device.
*
* The index into the key table for this PTK is the same as the
* device's port index.
*/
int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
const void *ptk, size_t key_size)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
struct di_buf_entry *di = &whc->di_buf[port_idx];
int ret;
mutex_lock(&whc->mutex);
if (ptk) {
ret = whc_set_key(whc, port_idx, tkid, ptk, key_size, false);
if (ret)
goto out;
di->addr_sec_info &= ~WHC_DI_KEY_IDX_MASK;
di->addr_sec_info |= WHC_DI_SECURE | WHC_DI_KEY_IDX(port_idx);
} else
di->addr_sec_info &= ~WHC_DI_SECURE;
ret = whc_update_di(whc, port_idx);
out:
mutex_unlock(&whc->mutex);
return ret;
}
/**
* whc_set_gtk - set the GTK for subsequent broadcast packets
*
* The GTK is stored in the last entry in the key table (the previous
* N_DEVICES entries are for the per-device PTKs).
*/
int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
const void *gtk, size_t key_size)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
int ret;
mutex_lock(&whc->mutex);
ret = whc_set_key(whc, whc->n_devices, tkid, gtk, key_size, true);
mutex_unlock(&whc->mutex);
return ret;
}
int whc_set_cluster_id(struct whc *whc, u8 bcid)
{
whc_write_wusbcmd(whc, WUSBCMD_BCID_MASK, WUSBCMD_BCID(bcid));
return 0;
}
