/******************************************************************************
*
* Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/export.h>
#include "iwl-drv.h"
#include "iwl-io.h"
#include "iwl-csr.h"
#include "iwl-debug.h"
#include "iwl-prph.h"
#include "iwl-fh.h"
#define IWL_POLL_INTERVAL 10 /* microseconds */
int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
u32 bits, u32 mask, int timeout)
{
int t = 0;
do {
if ((iwl_read32(trans, addr) & mask) == (bits & mask))
return t;
udelay(IWL_POLL_INTERVAL);
t += IWL_POLL_INTERVAL;
} while (t < timeout);
return -ETIMEDOUT;
}
IWL_EXPORT_SYMBOL(iwl_poll_bit);
u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
{
u32 value = 0x5a5a5a5a;
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, false, &flags)) {
value = iwl_read32(trans, reg);
iwl_trans_release_nic_access(trans, &flags);
}
return value;
}
IWL_EXPORT_SYMBOL(iwl_read_direct32);
void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
{
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, false, &flags)) {
iwl_write32(trans, reg, value);
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_write_direct32);
int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
int timeout)
{
int t = 0;
do {
if ((iwl_read_direct32(trans, addr) & mask) == mask)
return t;
udelay(IWL_POLL_INTERVAL);
t += IWL_POLL_INTERVAL;
} while (t < timeout);
return -ETIMEDOUT;
}
IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
u32 __iwl_read_prph(struct iwl_trans *trans, u32 ofs)
{
u32 val = iwl_trans_read_prph(trans, ofs);
trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
return val;
}
void __iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
{
trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
iwl_trans_write_prph(trans, ofs, val);
}
u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
{
unsigned long flags;
u32 val = 0x5a5a5a5a;
if (iwl_trans_grab_nic_access(trans, false, &flags)) {
val = __iwl_read_prph(trans, ofs);
iwl_trans_release_nic_access(trans, &flags);
}
return val;
}
IWL_EXPORT_SYMBOL(iwl_read_prph);
void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
{
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, false, &flags)) {
__iwl_write_prph(trans, ofs, val);
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_write_prph);
int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
u32 bits, u32 mask, int timeout)
{
int t = 0;
do {
if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
return t;
udelay(IWL_POLL_INTERVAL);
t += IWL_POLL_INTERVAL;
} while (t < timeout);
return -ETIMEDOUT;
}
void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
{
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, false, &flags)) {
__iwl_write_prph(trans, ofs,
__iwl_read_prph(trans, ofs) | mask);
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
u32 bits, u32 mask)
{
unsigned long flags;
if (iwl_trans_grab_nic_access(trans, false, &flags)) {
__iwl_write_prph(trans, ofs,
(__iwl_read_prph(trans, ofs) & mask) | bits);
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
{
unsigned long flags;
u32 val;
if (iwl_trans_grab_nic_access(trans, false, &flags)) {
val = __iwl_read_prph(trans, ofs);
__iwl_write_prph(trans, ofs, (val & ~mask));
iwl_trans_release_nic_access(trans, &flags);
}
}
IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
void iwl_force_nmi(struct iwl_trans *trans)
{
/*
* In HW previous to the 8000 HW family, and in the 8000 HW family
* itself when the revision step==0, the DEVICE_SET_NMI_REG is used
* to force an NMI. Otherwise, a different register -
* DEVICE_SET_NMI_8000B_REG - is used.
*/
if ((trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) ||
(CSR_HW_REV_STEP(trans->hw_rev) == SILICON_A_STEP)) {
iwl_write_prph(trans, DEVICE_SET_NMI_REG,
DEVICE_SET_NMI_VAL_DRV);
iwl_write_prph(trans, DEVICE_SET_NMI_REG,
DEVICE_SET_NMI_VAL_HW);
} else {
iwl_write_prph(trans, DEVICE_SET_NMI_8000B_REG,
DEVICE_SET_NMI_8000B_VAL);
}
}
IWL_EXPORT_SYMBOL(iwl_force_nmi);
static const char *get_fh_string(int cmd)
{
#define IWL_CMD(x) case x: return #x
switch (cmd) {
IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
IWL_CMD(FH_RSCSR_CHNL0_WPTR);
IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
IWL_CMD(FH_TSSR_TX_STATUS_REG);
IWL_CMD(FH_TSSR_TX_ERROR_REG);
default:
return "UNKNOWN";
}
#undef IWL_CMD
}
int iwl_dump_fh(struct iwl_trans *trans, char **buf)
{
int i;
static const u32 fh_tbl[] = {
FH_RSCSR_CHNL0_STTS_WPTR_REG,
FH_RSCSR_CHNL0_RBDCB_BASE_REG,
FH_RSCSR_CHNL0_WPTR,
FH_MEM_RCSR_CHNL0_CONFIG_REG,
FH_MEM_RSSR_SHARED_CTRL_REG,
FH_MEM_RSSR_RX_STATUS_REG,
FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
FH_TSSR_TX_STATUS_REG,
FH_TSSR_TX_ERROR_REG
};
#ifdef CONFIG_IWLWIFI_DEBUGFS
if (buf) {
int pos = 0;
size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
*buf = kmalloc(bufsz, GFP_KERNEL);
if (!*buf)
return -ENOMEM;
pos += scnprintf(*buf + pos, bufsz - pos,
"FH register values:\n");
for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
pos += scnprintf(*buf + pos, bufsz - pos,
" %34s: 0X%08x\n",
get_fh_string(fh_tbl[i]),
iwl_read_direct32(trans, fh_tbl[i]));
return pos;
}
#endif
IWL_ERR(trans, "FH register values:\n");
for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
IWL_ERR(trans, " %34s: 0X%08x\n",
get_fh_string(fh_tbl[i]),
iwl_read_direct32(trans, fh_tbl[i]));
return 0;
}
