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cxacru.c
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/******************************************************************************
* cxacru.c - driver for USB ADSL modems based on
* Conexant AccessRunner chipset
*
* Copyright (C) 2004 David Woodhouse, Duncan Sands, Roman Kagan
* Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
* Copyright (C) 2007 Simon Arlott
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* 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., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
/*
* Credit is due for Josep Comas, who created the original patch to speedtch.c
* to support the different padding used by the AccessRunner (now generalized
* into usbatm), and the userspace firmware loading utility.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/mutex.h>
#include <asm/unaligned.h>
#include "usbatm.h"
#define DRIVER_AUTHOR "Roman Kagan, David Woodhouse, Duncan Sands, Simon Arlott"
#define DRIVER_VERSION "0.3"
#define DRIVER_DESC "Conexant AccessRunner ADSL USB modem driver"
static const char cxacru_driver_name[] = "cxacru";
#define CXACRU_EP_CMD 0x01 /* Bulk/interrupt in/out */
#define CXACRU_EP_DATA 0x02 /* Bulk in/out */
#define CMD_PACKET_SIZE 64 /* Should be maxpacket(ep)? */
/* Addresses */
#define PLLFCLK_ADDR 0x00350068
#define PLLBCLK_ADDR 0x0035006c
#define SDRAMEN_ADDR 0x00350010
#define FW_ADDR 0x00801000
#define BR_ADDR 0x00180600
#define SIG_ADDR 0x00180500
#define BR_STACK_ADDR 0x00187f10
/* Values */
#define SDRAM_ENA 0x1
#define CMD_TIMEOUT 2000 /* msecs */
#define POLL_INTERVAL 1 /* secs */
/* commands for interaction with the modem through the control channel before
* firmware is loaded */
enum cxacru_fw_request {
FW_CMD_ERR,
FW_GET_VER,
FW_READ_MEM,
FW_WRITE_MEM,
FW_RMW_MEM,
FW_CHECKSUM_MEM,
FW_GOTO_MEM,
};
/* commands for interaction with the modem through the control channel once
* firmware is loaded */
enum cxacru_cm_request {
CM_REQUEST_UNDEFINED = 0x80,
CM_REQUEST_TEST,
CM_REQUEST_CHIP_GET_MAC_ADDRESS,
CM_REQUEST_CHIP_GET_DP_VERSIONS,
CM_REQUEST_CHIP_ADSL_LINE_START,
CM_REQUEST_CHIP_ADSL_LINE_STOP,
CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
CM_REQUEST_CARD_INFO_GET,
CM_REQUEST_CARD_DATA_GET,
CM_REQUEST_CARD_DATA_SET,
CM_REQUEST_COMMAND_HW_IO,
CM_REQUEST_INTERFACE_HW_IO,
CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
CM_REQUEST_CARD_GET_STATUS,
CM_REQUEST_CARD_GET_MAC_ADDRESS,
CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
CM_REQUEST_MAX,
};
/* reply codes to the commands above */
enum cxacru_cm_status {
CM_STATUS_UNDEFINED,
CM_STATUS_SUCCESS,
CM_STATUS_ERROR,
CM_STATUS_UNSUPPORTED,
CM_STATUS_UNIMPLEMENTED,
CM_STATUS_PARAMETER_ERROR,
CM_STATUS_DBG_LOOPBACK,
CM_STATUS_MAX,
};
/* indices into CARD_INFO_GET return array */
enum cxacru_info_idx {
CXINF_DOWNSTREAM_RATE,
CXINF_UPSTREAM_RATE,
CXINF_LINK_STATUS,
CXINF_LINE_STATUS,
CXINF_MAC_ADDRESS_HIGH,
CXINF_MAC_ADDRESS_LOW,
CXINF_UPSTREAM_SNR_MARGIN,
CXINF_DOWNSTREAM_SNR_MARGIN,
CXINF_UPSTREAM_ATTENUATION,
CXINF_DOWNSTREAM_ATTENUATION,
CXINF_TRANSMITTER_POWER,
CXINF_UPSTREAM_BITS_PER_FRAME,
CXINF_DOWNSTREAM_BITS_PER_FRAME,
CXINF_STARTUP_ATTEMPTS,
CXINF_UPSTREAM_CRC_ERRORS,
CXINF_DOWNSTREAM_CRC_ERRORS,
CXINF_UPSTREAM_FEC_ERRORS,
CXINF_DOWNSTREAM_FEC_ERRORS,
CXINF_UPSTREAM_HEC_ERRORS,
CXINF_DOWNSTREAM_HEC_ERRORS,
CXINF_LINE_STARTABLE,
CXINF_MODULATION,
CXINF_ADSL_HEADEND,
CXINF_ADSL_HEADEND_ENVIRONMENT,
CXINF_CONTROLLER_VERSION,
/* dunno what the missing two mean */
CXINF_MAX = 0x1c,
};
enum cxacru_poll_state {
CXPOLL_STOPPING,
CXPOLL_STOPPED,
CXPOLL_POLLING,
CXPOLL_SHUTDOWN
};
struct cxacru_modem_type {
u32 pll_f_clk;
u32 pll_b_clk;
int boot_rom_patch;
};
struct cxacru_data {
struct usbatm_data *usbatm;
const struct cxacru_modem_type *modem_type;
int line_status;
struct mutex adsl_state_serialize;
int adsl_status;
struct delayed_work poll_work;
u32 card_info[CXINF_MAX];
struct mutex poll_state_serialize;
enum cxacru_poll_state poll_state;
/* contol handles */
struct mutex cm_serialize;
u8 *rcv_buf;
u8 *snd_buf;
struct urb *rcv_urb;
struct urb *snd_urb;
struct completion rcv_done;
struct completion snd_done;
};
static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
u8 *wdata, int wsize, u8 *rdata, int rsize);
static void cxacru_poll_status(struct work_struct *work);
/* Card info exported through sysfs */
#define CXACRU__ATTR_INIT(_name) \
static DEVICE_ATTR(_name, S_IRUGO, cxacru_sysfs_show_##_name, NULL)
#define CXACRU_CMD_INIT(_name) \
static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \
cxacru_sysfs_show_##_name, cxacru_sysfs_store_##_name)
#define CXACRU_ATTR_INIT(_value, _type, _name) \
static ssize_t cxacru_sysfs_show_##_name(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct usb_interface *intf = to_usb_interface(dev); \
struct usbatm_data *usbatm_instance = usb_get_intfdata(intf); \
struct cxacru_data *instance = usbatm_instance->driver_data; \
return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
} \
CXACRU__ATTR_INIT(_name)
#define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
#define CXACRU_CMD_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
#define CXACRU__ATTR_CREATE(_name) CXACRU_DEVICE_CREATE_FILE(_name)
#define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
#define CXACRU_CMD_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
#define CXACRU__ATTR_REMOVE(_name) CXACRU_DEVICE_REMOVE_FILE(_name)
static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%u\n", value);
}
static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", value);
}
static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d.%02u\n",
value / 100, abs(value) % 100);
}
static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
{
static char *str[] = { "no", "yes" };
if (unlikely(value >= ARRAY_SIZE(str)))
return snprintf(buf, PAGE_SIZE, "%u\n", value);
return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
}
static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
{
static char *str[] = { NULL, "not connected", "connected", "lost" };
if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
return snprintf(buf, PAGE_SIZE, "%u\n", value);
return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
}
static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
{
static char *str[] = { "down", "attempting to activate",
"training", "channel analysis", "exchange", "up",
"waiting", "initialising"
};
if (unlikely(value >= ARRAY_SIZE(str)))
return snprintf(buf, PAGE_SIZE, "%u\n", value);
return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
}
static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
{
static char *str[] = {
NULL,
"ANSI T1.413",
"ITU-T G.992.1 (G.DMT)",
"ITU-T G.992.2 (G.LITE)"
};
if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
return snprintf(buf, PAGE_SIZE, "%u\n", value);
return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
}
/*
* This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
* this data is already in atm_dev there's no point.
*
* MAC_ADDRESS_HIGH = 0x????5544
* MAC_ADDRESS_LOW = 0x33221100
* Where 00-55 are bytes 0-5 of the MAC.
*/
static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_interface *intf = to_usb_interface(dev);
struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
struct atm_dev *atm_dev = usbatm_instance->atm_dev;
return snprintf(buf, PAGE_SIZE, "%02x:%02x:%02x:%02x:%02x:%02x\n",
atm_dev->esi[0], atm_dev->esi[1], atm_dev->esi[2],
atm_dev->esi[3], atm_dev->esi[4], atm_dev->esi[5]);
}
static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_interface *intf = to_usb_interface(dev);
struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
struct cxacru_data *instance = usbatm_instance->driver_data;
u32 value = instance->card_info[CXINF_LINE_STARTABLE];
static char *str[] = { "running", "stopped" };
if (unlikely(value >= ARRAY_SIZE(str)))
return snprintf(buf, PAGE_SIZE, "%u\n", value);
return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
}
static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct usb_interface *intf = to_usb_interface(dev);
struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
struct cxacru_data *instance = usbatm_instance->driver_data;
int ret;
int poll = -1;
char str_cmd[8];
int len = strlen(buf);
if (!capable(CAP_NET_ADMIN))
return -EACCES;
ret = sscanf(buf, "%7s", str_cmd);
if (ret != 1)
return -EINVAL;
ret = 0;
if (mutex_lock_interruptible(&instance->adsl_state_serialize))
return -ERESTARTSYS;
if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
if (ret < 0) {
atm_err(usbatm_instance, "change adsl state:"
" CHIP_ADSL_LINE_STOP returned %d\n", ret);
ret = -EIO;
} else {
ret = len;
poll = CXPOLL_STOPPED;
}
}
/* Line status is only updated every second
* and the device appears to only react to
* START/STOP every second too. Wait 1.5s to
* be sure that restart will have an effect. */
if (!strcmp(str_cmd, "restart"))
msleep(1500);
if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
if (ret < 0) {
atm_err(usbatm_instance, "change adsl state:"
" CHIP_ADSL_LINE_START returned %d\n", ret);
ret = -EIO;
} else {
ret = len;
poll = CXPOLL_POLLING;
}
}
if (!strcmp(str_cmd, "poll")) {
ret = len;
poll = CXPOLL_POLLING;
}
if (ret == 0) {
ret = -EINVAL;
poll = -1;
}
if (poll == CXPOLL_POLLING) {
mutex_lock(&instance->poll_state_serialize);
switch (instance->poll_state) {
case CXPOLL_STOPPED:
/* start polling */
instance->poll_state = CXPOLL_POLLING;
break;
case CXPOLL_STOPPING:
/* abort stop request */
instance->poll_state = CXPOLL_POLLING;
case CXPOLL_POLLING:
case CXPOLL_SHUTDOWN:
/* don't start polling */
poll = -1;
}
mutex_unlock(&instance->poll_state_serialize);
} else if (poll == CXPOLL_STOPPED) {
mutex_lock(&instance->poll_state_serialize);
/* request stop */
if (instance->poll_state == CXPOLL_POLLING)
instance->poll_state = CXPOLL_STOPPING;
mutex_unlock(&instance->poll_state_serialize);
}
mutex_unlock(&instance->adsl_state_serialize);
if (poll == CXPOLL_POLLING)
cxacru_poll_status(&instance->poll_work.work);
return ret;
}
/*
* All device attributes are included in CXACRU_ALL_FILES
* so that the same list can be used multiple times:
* INIT (define the device attributes)
* CREATE (create all the device files)
* REMOVE (remove all the device files)
*
* With the last two being defined as needed in the functions
* they are used in before calling CXACRU_ALL_FILES()
*/
#define CXACRU_ALL_FILES(_action) \
CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE, u32, downstream_rate); \
CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE, u32, upstream_rate); \
CXACRU_ATTR_##_action(CXINF_LINK_STATUS, LINK, link_status); \
CXACRU_ATTR_##_action(CXINF_LINE_STATUS, LINE, line_status); \
CXACRU__ATTR_##_action( mac_address); \
CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN, dB, upstream_snr_margin); \
CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN, dB, downstream_snr_margin); \
CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION, dB, upstream_attenuation); \
CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION, dB, downstream_attenuation); \
CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER, s8, transmitter_power); \
CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME, u32, upstream_bits_per_frame); \
CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32, downstream_bits_per_frame); \
CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS, u32, startup_attempts); \
CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS, u32, upstream_crc_errors); \
CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS, u32, downstream_crc_errors); \
CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS, u32, upstream_fec_errors); \
CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS, u32, downstream_fec_errors); \
CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS, u32, upstream_hec_errors); \
CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS, u32, downstream_hec_errors); \
CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE, bool, line_startable); \
CXACRU_ATTR_##_action(CXINF_MODULATION, MODU, modulation); \
CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND, u32, adsl_headend); \
CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT, u32, adsl_headend_environment); \
CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION, u32, adsl_controller_version); \
CXACRU_CMD_##_action( adsl_state);
CXACRU_ALL_FILES(INIT);
/* the following three functions are stolen from drivers/usb/core/message.c */
static void cxacru_blocking_completion(struct urb *urb)
{
complete(urb->context);
}
static void cxacru_timeout_kill(unsigned long data)
{
usb_unlink_urb((struct urb *) data);
}
static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
int* actual_length)
{
struct timer_list timer;
init_timer(&timer);
timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
timer.data = (unsigned long) urb;
timer.function = cxacru_timeout_kill;
add_timer(&timer);
wait_for_completion(done);
del_timer_sync(&timer);
if (actual_length)
*actual_length = urb->actual_length;
return urb->status; /* must read status after completion */
}
static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
u8 *wdata, int wsize, u8 *rdata, int rsize)
{
int ret, actlen;
int offb, offd;
const int stride = CMD_PACKET_SIZE - 4;
u8 *wbuf = instance->snd_buf;
u8 *rbuf = instance->rcv_buf;
int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
if (printk_ratelimit())
usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
wbuflen, rbuflen);
ret = -ENOMEM;
goto fail;
}
mutex_lock(&instance->cm_serialize);
/* submit reading urb before the writing one */
init_completion(&instance->rcv_done);
ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
if (ret < 0) {
if (printk_ratelimit())
usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
cm, ret);
goto fail;
}
memset(wbuf, 0, wbuflen);
/* handle wsize == 0 */
wbuf[0] = cm;
for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
wbuf[offb] = cm;
memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
}
instance->snd_urb->transfer_buffer_length = wbuflen;
init_completion(&instance->snd_done);
ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
if (ret < 0) {
if (printk_ratelimit())
usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
cm, ret);
goto fail;
}
ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
if (ret < 0) {
if (printk_ratelimit())
usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
goto fail;
}
ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
if (ret < 0) {
if (printk_ratelimit())
usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
goto fail;
}
if (actlen % CMD_PACKET_SIZE || !actlen) {
if (printk_ratelimit())
usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
cm, actlen);
ret = -EIO;
goto fail;
}
/* check the return status and copy the data to the output buffer, if needed */
for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
if (rbuf[offb] != cm) {
if (printk_ratelimit())
usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
rbuf[offb], cm);
ret = -EIO;
goto fail;
}
if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
if (printk_ratelimit())
usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
cm, rbuf[offb + 1]);
ret = -EIO;
goto fail;
}
if (offd >= rsize)
break;
memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
offd += stride;
}
ret = offd;
dbg("cm %#x", cm);
fail:
mutex_unlock(&instance->cm_serialize);
return ret;
}
static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
u32 *data, int size)
{
int ret, len;
__le32 *buf;
int offb, offd;
const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
int buflen = ((size - 1) / stride + 1 + size * 2) * 4;
buf = kmalloc(buflen, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
if (ret < 0)
goto cleanup;
/* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
len = ret / 4;
for (offb = 0; offb < len; ) {
int l = le32_to_cpu(buf[offb++]);
if (l > stride || l > (len - offb) / 2) {
if (printk_ratelimit())
usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
cm, l);
ret = -EIO;
goto cleanup;
}
while (l--) {
offd = le32_to_cpu(buf[offb++]);
if (offd >= size) {
if (printk_ratelimit())
usb_err(instance->usbatm, "wrong index #%x in response to cm #%x\n",
offd, cm);
ret = -EIO;
goto cleanup;
}
data[offd] = le32_to_cpu(buf[offb++]);
}
}
ret = 0;
cleanup:
kfree(buf);
return ret;
}
static int cxacru_card_status(struct cxacru_data *instance)
{
int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
if (ret < 0) { /* firmware not loaded */
dbg("cxacru_adsl_start: CARD_GET_STATUS returned %d", ret);
return ret;
}
return 0;
}
static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
struct atm_dev *atm_dev)
{
struct usb_interface *intf = usbatm_instance->usb_intf;
#define CXACRU_DEVICE_REMOVE_FILE(_name) \
device_remove_file(&intf->dev, &dev_attr_##_name);
CXACRU_ALL_FILES(REMOVE);
#undef CXACRU_DEVICE_REMOVE_FILE
}
static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
struct atm_dev *atm_dev)
{
struct cxacru_data *instance = usbatm_instance->driver_data;
struct usb_interface *intf = usbatm_instance->usb_intf;
/*
struct atm_dev *atm_dev = usbatm_instance->atm_dev;
*/
int ret;
int start_polling = 1;
dbg("cxacru_atm_start");
/* Read MAC address */
ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
atm_dev->esi, sizeof(atm_dev->esi));
if (ret < 0) {
atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
return ret;
}
#define CXACRU_DEVICE_CREATE_FILE(_name) \
ret = device_create_file(&intf->dev, &dev_attr_##_name); \
if (unlikely(ret)) \
goto fail_sysfs;
CXACRU_ALL_FILES(CREATE);
#undef CXACRU_DEVICE_CREATE_FILE
/* start ADSL */
mutex_lock(&instance->adsl_state_serialize);
ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
if (ret < 0)
atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
/* Start status polling */
mutex_lock(&instance->poll_state_serialize);
switch (instance->poll_state) {
case CXPOLL_STOPPED:
/* start polling */
instance->poll_state = CXPOLL_POLLING;
break;
case CXPOLL_STOPPING:
/* abort stop request */
instance->poll_state = CXPOLL_POLLING;
case CXPOLL_POLLING:
case CXPOLL_SHUTDOWN:
/* don't start polling */
start_polling = 0;
}
mutex_unlock(&instance->poll_state_serialize);
mutex_unlock(&instance->adsl_state_serialize);
if (start_polling)
cxacru_poll_status(&instance->poll_work.work);
return 0;
fail_sysfs:
usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
cxacru_remove_device_files(usbatm_instance, atm_dev);
return ret;
}
static void cxacru_poll_status(struct work_struct *work)
{
struct cxacru_data *instance =
container_of(work, struct cxacru_data, poll_work.work);
u32 buf[CXINF_MAX] = {};
struct usbatm_data *usbatm = instance->usbatm;
struct atm_dev *atm_dev = usbatm->atm_dev;
int keep_polling = 1;
int ret;
ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
if (ret < 0) {
if (ret != -ESHUTDOWN)
atm_warn(usbatm, "poll status: error %d\n", ret);
mutex_lock(&instance->poll_state_serialize);
if (instance->poll_state != CXPOLL_SHUTDOWN) {
instance->poll_state = CXPOLL_STOPPED;
if (ret != -ESHUTDOWN)
atm_warn(usbatm, "polling disabled, set adsl_state"
" to 'start' or 'poll' to resume\n");
}
mutex_unlock(&instance->poll_state_serialize);
goto reschedule;
}
memcpy(instance->card_info, buf, sizeof(instance->card_info));
if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
instance->adsl_status = buf[CXINF_LINE_STARTABLE];
switch (instance->adsl_status) {
case 0:
atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
break;
case 1:
atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
break;
default:
atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
break;
}
}
if (instance->line_status == buf[CXINF_LINE_STATUS])
goto reschedule;
instance->line_status = buf[CXINF_LINE_STATUS];
switch (instance->line_status) {
case 0:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: down\n");
break;
case 1:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: attempting to activate\n");
break;
case 2:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: training\n");
break;
case 3:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: channel analysis\n");
break;
case 4:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: exchange\n");
break;
case 5:
atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
atm_dev->signal = ATM_PHY_SIG_FOUND;
atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
break;
case 6:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: waiting\n");
break;
case 7:
atm_dev->signal = ATM_PHY_SIG_LOST;
atm_info(usbatm, "ADSL line: initializing\n");
break;
default:
atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
break;
}
reschedule:
mutex_lock(&instance->poll_state_serialize);
if (instance->poll_state == CXPOLL_STOPPING &&
instance->adsl_status == 1 && /* stopped */
instance->line_status == 0) /* down */
instance->poll_state = CXPOLL_STOPPED;
if (instance->poll_state == CXPOLL_STOPPED)
keep_polling = 0;
mutex_unlock(&instance->poll_state_serialize);
if (keep_polling)
schedule_delayed_work(&instance->poll_work,
round_jiffies_relative(POLL_INTERVAL*HZ));
}
static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
u8 code1, u8 code2, u32 addr, const u8 *data, int size)
{
int ret;
u8 *buf;
int offd, offb;
const int stride = CMD_PACKET_SIZE - 8;
buf = (u8 *) __get_free_page(GFP_KERNEL);
if (!buf)
return -ENOMEM;
offb = offd = 0;
do {
int l = min_t(int, stride, size - offd);
buf[offb++] = fw;
buf[offb++] = l;
buf[offb++] = code1;
buf[offb++] = code2;
put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
offb += 4;
addr += l;
if(l)
memcpy(buf + offb, data + offd, l);
if (l < stride)
memset(buf + offb + l, 0, stride - l);
offb += stride;
offd += stride;
if ((offb >= PAGE_SIZE) || (offd >= size)) {
ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
buf, offb, NULL, CMD_TIMEOUT);
if (ret < 0) {
dbg("sending fw %#x failed", fw);
goto cleanup;
}
offb = 0;
}
} while(offd < size);
dbg("sent fw %#x", fw);
ret = 0;
cleanup:
free_page((unsigned long) buf);
return ret;
}
static void cxacru_upload_firmware(struct cxacru_data *instance,
const struct firmware *fw,
const struct firmware *bp,
const struct firmware *cf)
{
int ret;
int off;
struct usbatm_data *usbatm = instance->usbatm;
struct usb_device *usb_dev = usbatm->usb_dev;
__le16 signature[] = { usb_dev->descriptor.idVendor,
usb_dev->descriptor.idProduct };
__le32 val;
dbg("cxacru_upload_firmware");
/* FirmwarePllFClkValue */
val = cpu_to_le32(instance->modem_type->pll_f_clk);
ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
if (ret) {
usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
return;
}
/* FirmwarePllBClkValue */
val = cpu_to_le32(instance->modem_type->pll_b_clk);
ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
if (ret) {
usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
return;
}
/* Enable SDRAM */
val = cpu_to_le32(SDRAM_ENA);
ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
if (ret) {
usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
return;
}
/* Firmware */
ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
if (ret) {
usb_err(usbatm, "Firmware upload failed: %d\n", ret);
return;
}
/* Boot ROM patch */
if (instance->modem_type->boot_rom_patch) {
ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
if (ret) {
usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
return;
}
}
/* Signature */
ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
if (ret) {
usb_err(usbatm, "Signature storing failed: %d\n", ret);
return;
}
if (instance->modem_type->boot_rom_patch) {
val = cpu_to_le32(BR_ADDR);
ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
}
else {
ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
}
if (ret) {
usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
return;
}
/* Delay to allow firmware to start up. */
msleep_interruptible(1000);
usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
if (ret < 0) {
usb_err(usbatm, "modem failed to initialize: %d\n", ret);
return;
}
/* Load config data (le32), doing one packet at a time */
if (cf)
for (off = 0; off < cf->size / 4; ) {
__le32 buf[CMD_PACKET_SIZE / 4 - 1];
int i, len = min_t(int, cf->size / 4 - off, CMD_PACKET_SIZE / 4 / 2 - 1);
buf[0] = cpu_to_le32(len);
for (i = 0; i < len; i++, off++) {
buf[i * 2 + 1] = cpu_to_le32(off);
memcpy(buf + i * 2 + 2, cf->data + off * 4, 4);
}
ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
(u8 *) buf, len, NULL, 0);
if (ret < 0) {
usb_err(usbatm, "load config data failed: %d\n", ret);
return;
}
}
msleep_interruptible(4000);
}
static int cxacru_find_firmware(struct cxacru_data *instance,
char* phase, const struct firmware **fw_p)
{
struct usbatm_data *usbatm = instance->usbatm;
struct device *dev = &usbatm->usb_intf->dev;
char buf[16];
sprintf(buf, "cxacru-%s.bin", phase);
dbg("cxacru_find_firmware: looking for %s", buf);
if (request_firmware(fw_p, buf, dev)) {
usb_dbg(usbatm, "no stage %s firmware found\n", phase);
return -ENOENT;
}
usb_info(usbatm, "found firmware %s\n", buf);
return 0;
}
static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
struct usb_interface *usb_intf)
{