static
int i2400mu_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
{
int result;
struct i2400mu *i2400mu =
container_of(i2400m, struct i2400mu, i2400m);
struct device *dev = i2400m_dev(i2400m);
static const __le32 i2400m_WARM_BOOT_BARKER[4] = {
cpu_to_le32(I2400M_WARM_RESET_BARKER),
cpu_to_le32(I2400M_WARM_RESET_BARKER),
cpu_to_le32(I2400M_WARM_RESET_BARKER),
cpu_to_le32(I2400M_WARM_RESET_BARKER),
};
static const __le32 i2400m_COLD_BOOT_BARKER[4] = {
cpu_to_le32(I2400M_COLD_RESET_BARKER),
cpu_to_le32(I2400M_COLD_RESET_BARKER),
cpu_to_le32(I2400M_COLD_RESET_BARKER),
cpu_to_le32(I2400M_COLD_RESET_BARKER),
};
d_fnstart(3, dev, "(i2400m %p rt %u)\n", i2400m, rt);
if (rt == I2400M_RT_WARM)
result = __i2400mu_send_barker(
i2400mu, i2400m_WARM_BOOT_BARKER,
sizeof(i2400m_WARM_BOOT_BARKER),
i2400mu->endpoint_cfg.bulk_out);
else if (rt == I2400M_RT_COLD)
result = __i2400mu_send_barker(
i2400mu, i2400m_COLD_BOOT_BARKER,
sizeof(i2400m_COLD_BOOT_BARKER),
i2400mu->endpoint_cfg.reset_cold);
else if (rt == I2400M_RT_BUS) {
result = usb_reset_device(i2400mu->usb_dev);
switch (result) {
case 0:
case -EINVAL:
case -ENODEV:
case -ENOENT:
case -ESHUTDOWN:
result = 0;
break;
default:
dev_err(dev, "USB reset failed (%d), giving up!\n",
result);
}
} else {
result = -EINVAL;
BUG();
}
if (result < 0
&& result != -EINVAL
&& rt != I2400M_RT_BUS) {
dev_err(dev, "%s reset failed (%d); trying USB reset\n",
rt == I2400M_RT_WARM ? "warm" : "cold", result);
usb_queue_reset_device(i2400mu->usb_iface);
result = -ENODEV;
}
d_fnend(3, dev, "(i2400m %p rt %u) = %d\n", i2400m, rt, result);
return result;
}
/*
* Reset a device at different levels (warm, cold or bus)
*
* @i2400m: device descriptor
* @reset_type: soft, warm or bus reset (I2400M_RT_WARM/SOFT/BUS)
*
* Warm and cold resets get a USB reset if they fail.
*
* Warm reset:
*
* The device will be fully reset internally, but won't be
* disconnected from the USB bus (so no reenumeration will
* happen). Firmware upload will be neccessary.
*
* The device will send a reboot barker in the notification endpoint
* that will trigger the driver to reinitialize the state
* automatically from notif.c:i2400m_notification_grok() into
* i2400m_dev_bootstrap_delayed().
*
* Cold and bus (USB) reset:
*
* The device will be fully reset internally, disconnected from the
* USB bus an a reenumeration will happen. Firmware upload will be
* neccessary. Thus, we don't do any locking or struct
* reinitialization, as we are going to be fully disconnected and
* reenumerated.
*
* Note we need to return -ENODEV if a warm reset was requested and we
* had to resort to a bus reset. See i2400m_op_reset(), wimax_reset()
* and wimax_dev->op_reset.
*
* WARNING: no driver state saved/fixed
*/
static
int i2400mu_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
{
int result;
struct i2400mu *i2400mu =
container_of(i2400m, struct i2400mu, i2400m);
struct device *dev = i2400m_dev(i2400m);
static const __le32 i2400m_WARM_BOOT_BARKER[4] = {
cpu_to_le32(I2400M_WARM_RESET_BARKER),
cpu_to_le32(I2400M_WARM_RESET_BARKER),
cpu_to_le32(I2400M_WARM_RESET_BARKER),
cpu_to_le32(I2400M_WARM_RESET_BARKER),
};
static const __le32 i2400m_COLD_BOOT_BARKER[4] = {
cpu_to_le32(I2400M_COLD_RESET_BARKER),
cpu_to_le32(I2400M_COLD_RESET_BARKER),
cpu_to_le32(I2400M_COLD_RESET_BARKER),
cpu_to_le32(I2400M_COLD_RESET_BARKER),
};
d_fnstart(3, dev, "(i2400m %p rt %u)\n", i2400m, rt);
if (rt == I2400M_RT_WARM)
result = __i2400mu_send_barker(i2400mu, i2400m_WARM_BOOT_BARKER,
sizeof(i2400m_WARM_BOOT_BARKER),
I2400MU_EP_BULK_OUT);
else if (rt == I2400M_RT_COLD)
result = __i2400mu_send_barker(i2400mu, i2400m_COLD_BOOT_BARKER,
sizeof(i2400m_COLD_BOOT_BARKER),
I2400MU_EP_RESET_COLD);
else if (rt == I2400M_RT_BUS) {
do_bus_reset:
result = usb_reset_device(i2400mu->usb_dev);
switch (result) {
case 0:
case -EINVAL: /* device is gone */
case -ENODEV:
case -ENOENT:
case -ESHUTDOWN:
result = rt == I2400M_RT_WARM ? -ENODEV : 0;
break; /* We assume the device is disconnected */
default:
dev_err(dev, "USB reset failed (%d), giving up!\n",
result);
}
} else {
result = -EINVAL; /* shut gcc up in certain arches */
BUG();
}
if (result < 0
&& result != -EINVAL /* device is gone */
&& rt != I2400M_RT_BUS) {
dev_err(dev, "%s reset failed (%d); trying USB reset\n",
rt == I2400M_RT_WARM ? "warm" : "cold", result);
rt = I2400M_RT_BUS;
goto do_bus_reset;
}
d_fnend(3, dev, "(i2400m %p rt %u) = %d\n", i2400m, rt, result);
return result;
}
/*
* Reset a device at different levels (warm, cold or bus)
*
* @i2400m: device descriptor
* @reset_type: soft, warm or bus reset (I2400M_RT_WARM/SOFT/BUS)
*
* Warm and cold resets get a USB reset if they fail.
*
* Warm reset:
*
* The device will be fully reset internally, but won't be
* disconnected from the USB bus (so no reenumeration will
* happen). Firmware upload will be necessary.
*
* The device will send a reboot barker in the notification endpoint
* that will trigger the driver to reinitialize the state
* automatically from notif.c:i2400m_notification_grok() into
* i2400m_dev_bootstrap_delayed().
*
* Cold and bus (USB) reset:
*
* The device will be fully reset internally, disconnected from the
* USB bus an a reenumeration will happen. Firmware upload will be
* necessary. Thus, we don't do any locking or struct
* reinitialization, as we are going to be fully disconnected and
* reenumerated.
*
* Note we need to return -ENODEV if a warm reset was requested and we
* had to resort to a bus reset. See i2400m_op_reset(), wimax_reset()
* and wimax_dev->op_reset.
*
* WARNING: no driver state saved/fixed
*/
static
int i2400mu_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
{
int result;
struct i2400mu *i2400mu =
container_of(i2400m, struct i2400mu, i2400m);
struct device *dev = i2400m_dev(i2400m);
static const __le32 i2400m_WARM_BOOT_BARKER[4] = {
cpu_to_le32(I2400M_WARM_RESET_BARKER),
cpu_to_le32(I2400M_WARM_RESET_BARKER),
cpu_to_le32(I2400M_WARM_RESET_BARKER),
cpu_to_le32(I2400M_WARM_RESET_BARKER),
};
static const __le32 i2400m_COLD_BOOT_BARKER[4] = {
cpu_to_le32(I2400M_COLD_RESET_BARKER),
cpu_to_le32(I2400M_COLD_RESET_BARKER),
cpu_to_le32(I2400M_COLD_RESET_BARKER),
cpu_to_le32(I2400M_COLD_RESET_BARKER),
};
d_fnstart(3, dev, "(i2400m %p rt %u)\n", i2400m, rt);
if (rt == I2400M_RT_WARM)
result = __i2400mu_send_barker(
i2400mu, i2400m_WARM_BOOT_BARKER,
sizeof(i2400m_WARM_BOOT_BARKER),
i2400mu->endpoint_cfg.bulk_out);
else if (rt == I2400M_RT_COLD)
result = __i2400mu_send_barker(
i2400mu, i2400m_COLD_BOOT_BARKER,
sizeof(i2400m_COLD_BOOT_BARKER),
i2400mu->endpoint_cfg.reset_cold);
else if (rt == I2400M_RT_BUS) {
result = usb_reset_device(i2400mu->usb_dev);
switch (result) {
case 0:
case -EINVAL: /* device is gone */
case -ENODEV:
case -ENOENT:
case -ESHUTDOWN:
result = 0;
break; /* We assume the device is disconnected */
default:
dev_err(dev, "USB reset failed (%d), giving up!\n",
result);
}
} else {
result = -EINVAL; /* shut gcc up in certain arches */
BUG();
}
if (result < 0
&& result != -EINVAL /* device is gone */
&& rt != I2400M_RT_BUS) {
/*
* Things failed -- resort to lower level reset, that
* we queue in another context; the reason for this is
* that the pre and post reset functionality requires
* the i2400m->init_mutex; RT_WARM and RT_COLD can
* come from areas where i2400m->init_mutex is taken.
*/
dev_err(dev, "%s reset failed (%d); trying USB reset\n",
rt == I2400M_RT_WARM ? "warm" : "cold", result);
usb_queue_reset_device(i2400mu->usb_iface);
result = -ENODEV;
}
d_fnend(3, dev, "(i2400m %p rt %u) = %d\n", i2400m, rt, result);
return result;
}
