You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
87 lines
2.4 KiB
87 lines
2.4 KiB
/*
|
|
* Wireless Host Controller (WHC) hardware access helpers.
|
|
*
|
|
* 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/kernel.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/uwb/umc.h>
|
|
|
|
#include "../../wusbcore/wusbhc.h"
|
|
|
|
#include "whcd.h"
|
|
|
|
void whc_write_wusbcmd(struct whc *whc, u32 mask, u32 val)
|
|
{
|
|
unsigned long flags;
|
|
u32 cmd;
|
|
|
|
spin_lock_irqsave(&whc->lock, flags);
|
|
|
|
cmd = le_readl(whc->base + WUSBCMD);
|
|
cmd = (cmd & ~mask) | val;
|
|
le_writel(cmd, whc->base + WUSBCMD);
|
|
|
|
spin_unlock_irqrestore(&whc->lock, flags);
|
|
}
|
|
|
|
/**
|
|
* whc_do_gencmd - start a generic command via the WUSBGENCMDSTS register
|
|
* @whc: the WHCI HC
|
|
* @cmd: command to start.
|
|
* @params: parameters for the command (the WUSBGENCMDPARAMS register value).
|
|
* @addr: pointer to any data for the command (may be NULL).
|
|
* @len: length of the data (if any).
|
|
*/
|
|
int whc_do_gencmd(struct whc *whc, u32 cmd, u32 params, void *addr, size_t len)
|
|
{
|
|
unsigned long flags;
|
|
dma_addr_t dma_addr;
|
|
int t;
|
|
|
|
mutex_lock(&whc->mutex);
|
|
|
|
/* Wait for previous command to complete. */
|
|
t = wait_event_timeout(whc->cmd_wq,
|
|
(le_readl(whc->base + WUSBGENCMDSTS) & WUSBGENCMDSTS_ACTIVE) == 0,
|
|
WHC_GENCMD_TIMEOUT_MS);
|
|
if (t == 0) {
|
|
dev_err(&whc->umc->dev, "generic command timeout (%04x/%04x)\n",
|
|
le_readl(whc->base + WUSBGENCMDSTS),
|
|
le_readl(whc->base + WUSBGENCMDPARAMS));
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
if (addr) {
|
|
memcpy(whc->gen_cmd_buf, addr, len);
|
|
dma_addr = whc->gen_cmd_buf_dma;
|
|
} else
|
|
dma_addr = 0;
|
|
|
|
/* Poke registers to start cmd. */
|
|
spin_lock_irqsave(&whc->lock, flags);
|
|
|
|
le_writel(params, whc->base + WUSBGENCMDPARAMS);
|
|
le_writeq(dma_addr, whc->base + WUSBGENADDR);
|
|
|
|
le_writel(WUSBGENCMDSTS_ACTIVE | WUSBGENCMDSTS_IOC | cmd,
|
|
whc->base + WUSBGENCMDSTS);
|
|
|
|
spin_unlock_irqrestore(&whc->lock, flags);
|
|
|
|
mutex_unlock(&whc->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|