diff options
Diffstat (limited to 'drivers/usb/host/whci/wusb.c')
| -rw-r--r-- | drivers/usb/host/whci/wusb.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/drivers/usb/host/whci/wusb.c b/drivers/usb/host/whci/wusb.c new file mode 100644 index 000000000..8a4d805ff --- /dev/null +++ b/drivers/usb/host/whci/wusb.c @@ -0,0 +1,210 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Wireless Host Controller (WHC) WUSB operations. + * + * Copyright (C) 2007 Cambridge Silicon Radio Ltd. + */ +#include <linux/kernel.h> +#include <linux/uwb/umc.h> + +#include "../../wusbcore/wusbhc.h" + +#include "whcd.h" + +static int whc_update_di(struct whc *whc, int idx) +{ + int offset = idx / 32; + u32 bit = 1 << (idx % 32); + + 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 MMCs based on there being a valid GTK so these need + * only start/stop the asynchronous and periodic schedules and send a + * channel stop command. + */ + +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, int delay) +{ + struct whc *whc = wusbhc_to_whc(wusbhc); + u32 stop_time, now_time; + int ret; + + pzl_stop(whc); + asl_stop(whc); + + now_time = le_readl(whc->base + WUSBTIME) & WUSBTIME_CHANNEL_TIME_MASK; + stop_time = (now_time + ((delay * 8) << 7)) & 0x00ffffff; + ret = whc_do_gencmd(whc, WUSBGENCMDSTS_CHAN_STOP, stop_time, NULL, 0); + if (ret == 0) + msleep(delay); +} + +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; +} |