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|
/*
* iwmc3200top - Intel Wireless MultiCom 3200 Top Driver
* drivers/misc/iwmc3200top/main.c
*
* Copyright (C) 2009 Intel Corporation. All rights reserved.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
*
* Author Name: Maxim Grabarnik <maxim.grabarnink@intel.com>
* -
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/debugfs.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio.h>
#include "iwmc3200top.h"
#include "log.h"
#include "fw-msg.h"
#include "debugfs.h"
#define DRIVER_DESCRIPTION "Intel(R) IWMC 3200 Top Driver"
#define DRIVER_COPYRIGHT "Copyright (c) 2008 Intel Corporation."
#define DRIVER_VERSION "0.1.62"
MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");
MODULE_AUTHOR(DRIVER_COPYRIGHT);
MODULE_FIRMWARE(FW_NAME(FW_API_VER));
static inline int __iwmct_tx(struct iwmct_priv *priv, void *src, int count)
{
return sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR, src, count);
}
int iwmct_tx(struct iwmct_priv *priv, void *src, int count)
{
int ret;
sdio_claim_host(priv->func);
ret = __iwmct_tx(priv, src, count);
sdio_release_host(priv->func);
return ret;
}
/*
* This workers main task is to wait for OP_OPR_ALIVE
* from TOP FW until ALIVE_MSG_TIMOUT timeout is elapsed.
* When OP_OPR_ALIVE received it will issue
* a call to "bus_rescan_devices".
*/
static void iwmct_rescan_worker(struct work_struct *ws)
{
struct iwmct_priv *priv;
int ret;
priv = container_of(ws, struct iwmct_priv, bus_rescan_worker);
LOG_INFO(priv, FW_MSG, "Calling bus_rescan\n");
ret = bus_rescan_devices(priv->func->dev.bus);
if (ret < 0)
LOG_INFO(priv, INIT, "bus_rescan_devices FAILED!!!\n");
}
static void op_top_message(struct iwmct_priv *priv, struct top_msg *msg)
{
switch (msg->hdr.opcode) {
case OP_OPR_ALIVE:
LOG_INFO(priv, FW_MSG, "Got ALIVE from device, wake rescan\n");
queue_work(priv->bus_rescan_wq, &priv->bus_rescan_worker);
break;
default:
LOG_INFO(priv, FW_MSG, "Received msg opcode 0x%X\n",
msg->hdr.opcode);
break;
}
}
static void handle_top_message(struct iwmct_priv *priv, u8 *buf, int len)
{
struct top_msg *msg;
msg = (struct top_msg *)buf;
if (msg->hdr.type != COMM_TYPE_D2H) {
LOG_ERROR(priv, FW_MSG,
"Message from TOP with invalid message type 0x%X\n",
msg->hdr.type);
return;
}
if (len < sizeof(msg->hdr)) {
LOG_ERROR(priv, FW_MSG,
"Message from TOP is too short for message header "
"received %d bytes, expected at least %zd bytes\n",
len, sizeof(msg->hdr));
return;
}
if (len < le16_to_cpu(msg->hdr.length) + sizeof(msg->hdr)) {
LOG_ERROR(priv, FW_MSG,
"Message length (%d bytes) is shorter than "
"in header (%d bytes)\n",
len, le16_to_cpu(msg->hdr.length));
return;
}
switch (msg->hdr.category) {
case COMM_CATEGORY_OPERATIONAL:
op_top_message(priv, (struct top_msg *)buf);
break;
case COMM_CATEGORY_DEBUG:
case COMM_CATEGORY_TESTABILITY:
case COMM_CATEGORY_DIAGNOSTICS:
iwmct_log_top_message(priv, buf, len);
break;
default:
LOG_ERROR(priv, FW_MSG,
"Message from TOP with unknown category 0x%X\n",
msg->hdr.category);
break;
}
}
int iwmct_send_hcmd(struct iwmct_priv *priv, u8 *cmd, u16 len)
{
int ret;
u8 *buf;
LOG_TRACE(priv, FW_MSG, "Sending hcmd:\n");
/* add padding to 256 for IWMC */
((struct top_msg *)cmd)->hdr.flags |= CMD_FLAG_PADDING_256;
LOG_HEXDUMP(FW_MSG, cmd, len);
if (len > FW_HCMD_BLOCK_SIZE) {
LOG_ERROR(priv, FW_MSG, "size %d exceeded hcmd max size %d\n",
len, FW_HCMD_BLOCK_SIZE);
return -1;
}
buf = kzalloc(FW_HCMD_BLOCK_SIZE, GFP_KERNEL);
if (!buf) {
LOG_ERROR(priv, FW_MSG, "kzalloc error, buf size %d\n",
FW_HCMD_BLOCK_SIZE);
return -1;
}
memcpy(buf, cmd, len);
ret = iwmct_tx(priv, buf, FW_HCMD_BLOCK_SIZE);
kfree(buf);
return ret;
}
static void iwmct_irq_read_worker(struct work_struct *ws)
{
struct iwmct_priv *priv;
struct iwmct_work_struct *read_req;
__le32 *buf = NULL;
int ret;
int iosize;
u32 barker;
bool is_barker;
priv = container_of(ws, struct iwmct_priv, isr_worker);
LOG_TRACE(priv, IRQ, "enter iwmct_irq_read_worker %p\n", ws);
/* --------------------- Handshake with device -------------------- */
sdio_claim_host(priv->func);
/* all list manipulations have to be protected by
* sdio_claim_host/sdio_release_host */
if (list_empty(&priv->read_req_list)) {
LOG_ERROR(priv, IRQ, "read_req_list empty in read worker\n");
goto exit_release;
}
read_req = list_entry(priv->read_req_list.next,
struct iwmct_work_struct, list);
list_del(&read_req->list);
iosize = read_req->iosize;
kfree(read_req);
buf = kzalloc(iosize, GFP_KERNEL);
if (!buf) {
LOG_ERROR(priv, IRQ, "kzalloc error, buf size %d\n", iosize);
goto exit_release;
}
LOG_INFO(priv, IRQ, "iosize=%d, buf=%p, func=%d\n",
iosize, buf, priv->func->num);
/* read from device */
ret = sdio_memcpy_fromio(priv->func, buf, IWMC_SDIO_DATA_ADDR, iosize);
if (ret) {
LOG_ERROR(priv, IRQ, "error %d reading buffer\n", ret);
goto exit_release;
}
LOG_HEXDUMP(IRQ, (u8 *)buf, iosize);
barker = le32_to_cpu(buf[0]);
/* Verify whether it's a barker and if not - treat as regular Rx */
|