diff options
Diffstat (limited to 'kernel/drivers/net/wimax/i2400m/usb.c')
| -rw-r--r-- | kernel/drivers/net/wimax/i2400m/usb.c | 817 |
1 files changed, 817 insertions, 0 deletions
diff --git a/kernel/drivers/net/wimax/i2400m/usb.c b/kernel/drivers/net/wimax/i2400m/usb.c new file mode 100644 index 000000000..e7f5910a6 --- /dev/null +++ b/kernel/drivers/net/wimax/i2400m/usb.c @@ -0,0 +1,817 @@ +/* + * Intel Wireless WiMAX Connection 2400m + * Linux driver model glue for USB device, reset & fw upload + * + * + * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com> + * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> + * Yanir Lubetkin <yanirx.lubetkin@intel.com> + * + * 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. + * + * + * See i2400m-usb.h for a general description of this driver. + * + * This file implements driver model glue, and hook ups for the + * generic driver to implement the bus-specific functions (device + * communication setup/tear down, firmware upload and resetting). + * + * ROADMAP + * + * i2400mu_probe() + * alloc_netdev()... + * i2400mu_netdev_setup() + * i2400mu_init() + * i2400m_netdev_setup() + * i2400m_setup()... + * + * i2400mu_disconnect + * i2400m_release() + * free_netdev() + * + * i2400mu_suspend() + * i2400m_cmd_enter_powersave() + * i2400mu_notification_release() + * + * i2400mu_resume() + * i2400mu_notification_setup() + * + * i2400mu_bus_dev_start() Called by i2400m_dev_start() [who is + * i2400mu_tx_setup() called by i2400m_setup()] + * i2400mu_rx_setup() + * i2400mu_notification_setup() + * + * i2400mu_bus_dev_stop() Called by i2400m_dev_stop() [who is + * i2400mu_notification_release() called by i2400m_release()] + * i2400mu_rx_release() + * i2400mu_tx_release() + * + * i2400mu_bus_reset() Called by i2400m_reset + * __i2400mu_reset() + * __i2400mu_send_barker() + * usb_reset_device() + */ +#include "i2400m-usb.h" +#include <linux/wimax/i2400m.h> +#include <linux/debugfs.h> +#include <linux/slab.h> +#include <linux/module.h> + + +#define D_SUBMODULE usb +#include "usb-debug-levels.h" + +static char i2400mu_debug_params[128]; +module_param_string(debug, i2400mu_debug_params, sizeof(i2400mu_debug_params), + 0644); +MODULE_PARM_DESC(debug, + "String of space-separated NAME:VALUE pairs, where NAMEs " + "are the different debug submodules and VALUE are the " + "initial debug value to set."); + +/* Our firmware file name */ +static const char *i2400mu_bus_fw_names_5x50[] = { +#define I2400MU_FW_FILE_NAME_v1_5 "i2400m-fw-usb-1.5.sbcf" + I2400MU_FW_FILE_NAME_v1_5, +#define I2400MU_FW_FILE_NAME_v1_4 "i2400m-fw-usb-1.4.sbcf" + I2400MU_FW_FILE_NAME_v1_4, + NULL, +}; + + +static const char *i2400mu_bus_fw_names_6050[] = { +#define I6050U_FW_FILE_NAME_v1_5 "i6050-fw-usb-1.5.sbcf" + I6050U_FW_FILE_NAME_v1_5, + NULL, +}; + + +static +int i2400mu_bus_dev_start(struct i2400m *i2400m) +{ + int result; + struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m); + struct device *dev = &i2400mu->usb_iface->dev; + + d_fnstart(3, dev, "(i2400m %p)\n", i2400m); + result = i2400mu_tx_setup(i2400mu); + if (result < 0) + goto error_usb_tx_setup; + result = i2400mu_rx_setup(i2400mu); + if (result < 0) + goto error_usb_rx_setup; + result = i2400mu_notification_setup(i2400mu); + if (result < 0) + goto error_notif_setup; + d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); + return result; + +error_notif_setup: + i2400mu_rx_release(i2400mu); +error_usb_rx_setup: + i2400mu_tx_release(i2400mu); +error_usb_tx_setup: + d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); + return result; +} + + +static +void i2400mu_bus_dev_stop(struct i2400m *i2400m) +{ + struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m); + struct device *dev = &i2400mu->usb_iface->dev; + + d_fnstart(3, dev, "(i2400m %p)\n", i2400m); + i2400mu_notification_release(i2400mu); + i2400mu_rx_release(i2400mu); + i2400mu_tx_release(i2400mu); + d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); +} + + +/* + * Sends a barker buffer to the device + * + * This helper will allocate a kmalloced buffer and use it to transmit + * (then free it). Reason for this is that other arches cannot use + * stack/vmalloc/text areas for DMA transfers. + * + * Error recovery here is simpler: anything is considered a hard error + * and will move the reset code to use a last-resort bus-based reset. + */ +static +int __i2400mu_send_barker(struct i2400mu *i2400mu, + const __le32 *barker, + size_t barker_size, + unsigned endpoint) +{ + struct usb_endpoint_descriptor *epd = NULL; + int pipe, actual_len, ret; + struct device *dev = &i2400mu->usb_iface->dev; + void *buffer; + int do_autopm = 1; + + ret = usb_autopm_get_interface(i2400mu->usb_iface); + if (ret < 0) { + dev_err(dev, "RESET: can't get autopm: %d\n", ret); + do_autopm = 0; + } + ret = -ENOMEM; + buffer = kmalloc(barker_size, GFP_KERNEL); + if (buffer == NULL) + goto error_kzalloc; + epd = usb_get_epd(i2400mu->usb_iface, endpoint); + pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress); + memcpy(buffer, barker, barker_size); +retry: + ret = usb_bulk_msg(i2400mu->usb_dev, pipe, buffer, barker_size, + &actual_len, 200); + switch (ret) { + case 0: + if (actual_len != barker_size) { /* Too short? drop it */ + dev_err(dev, "E: %s: short write (%d B vs %zu " + "expected)\n", + __func__, actual_len, barker_size); + ret = -EIO; + } + break; + case -EPIPE: + /* + * Stall -- maybe the device is choking with our + * requests. Clear it and give it some time. If they + * happen to often, it might be another symptom, so we + * reset. + * + * No error handling for usb_clear_halt(0; if it + * works, the retry works; if it fails, this switch + * does the error handling for us. + */ + if (edc_inc(&i2400mu->urb_edc, + 10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) { + dev_err(dev, "E: %s: too many stalls in " + "URB; resetting device\n", __func__); + usb_queue_reset_device(i2400mu->usb_iface); + /* fallthrough */ + } else { + usb_clear_halt(i2400mu->usb_dev, pipe); + msleep(10); /* give the device some time */ + goto retry; + } + case -EINVAL: /* while removing driver */ + case -ENODEV: /* dev disconnect ... */ + case -ENOENT: /* just ignore it */ + case -ESHUTDOWN: /* and exit */ + case -ECONNRESET: + ret = -ESHUTDOWN; + break; + default: /* Some error? */ + if (edc_inc(&i2400mu->urb_edc, + EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) { + dev_err(dev, "E: %s: maximum errors in URB " + "exceeded; resetting device\n", + __func__); + usb_queue_reset_device(i2400mu->usb_iface); + } else { + dev_warn(dev, "W: %s: cannot send URB: %d\n", + __func__, ret); + goto retry; + } + } + kfree(buffer); +error_kzalloc: + if (do_autopm) + usb_autopm_put_interface(i2400mu->usb_iface); + return ret; +} + + +/* + * 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; +} + +static void i2400mu_get_drvinfo(struct net_device *net_dev, + struct ethtool_drvinfo *info) +{ + struct i2400m *i2400m = net_dev_to_i2400m(net_dev); + struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m); + struct usb_device *udev = i2400mu->usb_dev; + + strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); + strlcpy(info->fw_version, i2400m->fw_name ? : "", + sizeof(info->fw_version)); + usb_make_path(udev, info->bus_info, sizeof(info->bus_info)); +} + +static const struct ethtool_ops i2400mu_ethtool_ops = { + .get_drvinfo = i2400mu_get_drvinfo, + .get_link = ethtool_op_get_link, +}; + +static +void i2400mu_netdev_setup(struct net_device *net_dev) +{ + struct i2400m *i2400m = net_dev_to_i2400m(net_dev); + struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m); + i2400mu_init(i2400mu); + i2400m_netdev_setup(net_dev); + net_dev->ethtool_ops = &i2400mu_ethtool_ops; +} + + +/* + * Debug levels control; see debug.h + */ +struct d_level D_LEVEL[] = { + D_SUBMODULE_DEFINE(usb), + D_SUBMODULE_DEFINE(fw), + D_SUBMODULE_DEFINE(notif), + D_SUBMODULE_DEFINE(rx), + D_SUBMODULE_DEFINE(tx), +}; +size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL); + + +#define __debugfs_register(prefix, name, parent) \ +do { \ + result = d_level_register_debugfs(prefix, name, parent); \ + if (result < 0) \ + goto error; \ +} while (0) + + +static +int i2400mu_debugfs_add(struct i2400mu *i2400mu) +{ + int result; + struct device *dev = &i2400mu->usb_iface->dev; + struct dentry *dentry = i2400mu->i2400m.wimax_dev.debugfs_dentry; + struct dentry *fd; + + dentry = debugfs_create_dir("i2400m-usb", dentry); + result = PTR_ERR(dentry); + if (IS_ERR(dentry)) { + if (result == -ENODEV) + result = 0; /* No debugfs support */ + goto error; + } + i2400mu->debugfs_dentry = dentry; + __debugfs_register("dl_", usb, dentry); + __debugfs_register("dl_", fw, dentry); + __debugfs_register("dl_", notif, dentry); + __debugfs_register("dl_", rx, dentry); + __debugfs_register("dl_", tx, dentry); + + /* Don't touch these if you don't know what you are doing */ + fd = debugfs_create_u8("rx_size_auto_shrink", 0600, dentry, + &i2400mu->rx_size_auto_shrink); + result = PTR_ERR(fd); + if (IS_ERR(fd) && result != -ENODEV) { + dev_err(dev, "Can't create debugfs entry " + "rx_size_auto_shrink: %d\n", result); + goto error; + } + + fd = debugfs_create_size_t("rx_size", 0600, dentry, + &i2400mu->rx_size); + result = PTR_ERR(fd); + if (IS_ERR(fd) && result != -ENODEV) { + dev_err(dev, "Can't create debugfs entry " + "rx_size: %d\n", result); + goto error; + } + + return 0; + +error: + debugfs_remove_recursive(i2400mu->debugfs_dentry); + return result; +} + + +static struct device_type i2400mu_type = { + .name = "wimax", +}; + +/* + * Probe a i2400m interface and register it + * + * @iface: USB interface to link to + * @id: USB class/subclass/protocol id + * @returns: 0 if ok, < 0 errno code on error. + * + * Alloc a net device, initialize the bus-specific details and then + * calls the bus-generic initialization routine. That will register + * the wimax and netdev devices, upload the firmware [using + * _bus_bm_*()], call _bus_dev_start() to finalize the setup of the + * communication with the device and then will start to talk to it to + * finnish setting it up. + */ +static +int i2400mu_probe(struct usb_interface *iface, + const struct usb_device_id *id) +{ + int result; + struct net_device *net_dev; + struct device *dev = &iface->dev; + struct i2400m *i2400m; + struct i2400mu *i2400mu; + struct usb_device *usb_dev = interface_to_usbdev(iface); + + if (usb_dev->speed != USB_SPEED_HIGH) + dev_err(dev, "device not connected as high speed\n"); + + /* Allocate instance [calls i2400m_netdev_setup() on it]. */ + result = -ENOMEM; + net_dev = alloc_netdev(sizeof(*i2400mu), "wmx%d", NET_NAME_UNKNOWN, + i2400mu_netdev_setup); + if (net_dev == NULL) { + dev_err(dev, "no memory for network device instance\n"); + goto error_alloc_netdev; + } + SET_NETDEV_DEV(net_dev, dev); + SET_NETDEV_DEVTYPE(net_dev, &i2400mu_type); + i2400m = net_dev_to_i2400m(net_dev); + i2400mu = container_of(i2400m, struct i2400mu, i2400m); + i2400m->wimax_dev.net_dev = net_dev; + i2400mu->usb_dev = usb_get_dev(usb_dev); + i2400mu->usb_iface = iface; + usb_set_intfdata(iface, i2400mu); + + i2400m->bus_tx_block_size = I2400MU_BLK_SIZE; + /* + * Room required in the Tx queue for USB message to accommodate + * a smallest payload while allocating header space is 16 bytes. + * Adding this room for the new tx message increases the + * possibilities of including any payload with size <= 16 bytes. + */ + i2400m->bus_tx_room_min = I2400MU_BLK_SIZE; + i2400m->bus_pl_size_max = I2400MU_PL_SIZE_MAX; + i2400m->bus_setup = NULL; + i2400m->bus_dev_start = i2400mu_bus_dev_start; + i2400m->bus_dev_stop = i2400mu_bus_dev_stop; + i2400m->bus_release = NULL; + i2400m->bus_tx_kick = i2400mu_bus_tx_kick; + i2400m->bus_reset = i2400mu_bus_reset; + i2400m->bus_bm_retries = I2400M_USB_BOOT_RETRIES; + i2400m->bus_bm_cmd_send = i2400mu_bus_bm_cmd_send; + i2400m->bus_bm_wait_for_ack = i2400mu_bus_bm_wait_for_ack; + i2400m->bus_bm_mac_addr_impaired = 0; + + switch (id->idProduct) { + case USB_DEVICE_ID_I6050: + case USB_DEVICE_ID_I6050_2: + case USB_DEVICE_ID_I6150: + case USB_DEVICE_ID_I6150_2: + case USB_DEVICE_ID_I6150_3: + case USB_DEVICE_ID_I6250: + i2400mu->i6050 = 1; + break; + default: + break; + } + + if (i2400mu->i6050) { + i2400m->bus_fw_names = i2400mu_bus_fw_names_6050; + i2400mu->endpoint_cfg.bulk_out = 0; + i2400mu->endpoint_cfg.notification = 3; + i2400mu->endpoint_cfg.reset_cold = 2; + i2400mu->endpoint_cfg.bulk_in = 1; + } else { + i2400m->bus_fw_names = i2400mu_bus_fw_names_5x50; + i2400mu->endpoint_cfg.bulk_out = 0; + i2400mu->endpoint_cfg.notification = 1; + i2400mu->endpoint_cfg.reset_cold = 2; + i2400mu->endpoint_cfg.bulk_in = 3; + } +#ifdef CONFIG_PM + iface->needs_remote_wakeup = 1; /* autosuspend (15s delay) */ + device_init_wakeup(dev, 1); + pm_runtime_set_autosuspend_delay(&usb_dev->dev, 15000); + usb_enable_autosuspend(usb_dev); +#endif + + result = i2400m_setup(i2400m, I2400M_BRI_MAC_REINIT); + if (result < 0) { + dev_err(dev, "cannot setup device: %d\n", result); + goto error_setup; + } + result = i2400mu_debugfs_add(i2400mu); + if (result < 0) { + dev_err(dev, "Can't register i2400mu's debugfs: %d\n", result); + goto error_debugfs_add; + } + return 0; + +error_debugfs_add: + i2400m_release(i2400m); +error_setup: + usb_set_intfdata(iface, NULL); + usb_put_dev(i2400mu->usb_dev); + free_netdev(net_dev); +error_alloc_netdev: + return result; +} + + +/* + * Disconect a i2400m from the system. + * + * i2400m_stop() has been called before, so al the rx and tx contexts + * have been taken down already. Make sure the queue is stopped, + * unregister netdev and i2400m, free and kill. + */ +static +void i2400mu_disconnect(struct usb_interface *iface) +{ + struct i2400mu *i2400mu = usb_get_intfdata(iface); + struct i2400m *i2400m = &i2400mu->i2400m; + struct net_device *net_dev = i2400m->wimax_dev.net_dev; + struct device *dev = &iface->dev; + + d_fnstart(3, dev, "(iface %p i2400m %p)\n", iface, i2400m); + + debugfs_remove_recursive(i2400mu->debugfs_dentry); + i2400m_release(i2400m); + usb_set_intfdata(iface, NULL); + usb_put_dev(i2400mu->usb_dev); + free_netdev(net_dev); + d_fnend(3, dev, "(iface %p i2400m %p) = void\n", iface, i2400m); +} + + +/* + * Get the device ready for USB port or system standby and hibernation + * + * USB port and system standby are handled the same. + * + * When the system hibernates, the USB device is powered down and then + * up, so we don't really have to do much here, as it will be seen as + * a reconnect. Still for simplicity we consider this case the same as + * suspend, so that the device has a chance to do notify the base + * station (if connected). + * + * So at the end, the three cases require common handling. + * + * If at the time of this call the device's firmware is not loaded, + * nothing has to be done. Note we can be "loose" about not reading + * i2400m->updown under i2400m->init_mutex. If it happens to change + * inmediately, other parts of the call flow will fail and effectively + * catch it. + * + * If the firmware is loaded, we need to: + * + * - tell the device to go into host interface power save mode, wait + * for it to ack + * + * This is quite more interesting than it is; we need to execute a + * command, but this time, we don't want the code in usb-{tx,rx}.c + * to call the usb_autopm_get/put_interface() barriers as it'd + * deadlock, so we need to decrement i2400mu->do_autopm, that acts + * as a poor man's semaphore. Ugly, but it works. + * + * As well, the device might refuse going to sleep for whichever + * reason. In this case we just fail. For system suspend/hibernate, + * we *can't* fail. We check PMSG_IS_AUTO to see if the + * suspend call comes from the USB stack or from the system and act + * in consequence. + * + * - stop the notification endpoint polling + */ +static +int i2400mu_suspend(struct usb_interface *iface, pm_message_t pm_msg) +{ + int result = 0; + struct device *dev = &iface->dev; + struct i2400mu *i2400mu = usb_get_intfdata(iface); + unsigned is_autosuspend = 0; + struct i2400m *i2400m = &i2400mu->i2400m; + +#ifdef CONFIG_PM + if (PMSG_IS_AUTO(pm_msg)) + is_autosuspend = 1; +#endif + + d_fnstart(3, dev, "(iface %p pm_msg %u)\n", iface, pm_msg.event); + rmb(); /* see i2400m->updown's documentation */ + if (i2400m->updown == 0) + goto no_firmware; + if (i2400m->state == I2400M_SS_DATA_PATH_CONNECTED && is_autosuspend) { + /* ugh -- the device is connected and this suspend + * request is an autosuspend one (not a system standby + * / hibernate). + * + * The only way the device can go to standby is if the + * link with the base station is in IDLE mode; that + * were the case, we'd be in status + * I2400M_SS_CONNECTED_IDLE. But we are not. + * + * If we *tell* him to go power save now, it'll reset + * as a precautionary measure, so if this is an + * autosuspend thing, say no and it'll come back + * later, when the link is IDLE + */ + result = -EBADF; + d_printf(1, dev, "fw up, link up, not-idle, autosuspend: " + "not entering powersave\n"); + goto error_not_now; + } + d_printf(1, dev, "fw up: entering powersave\n"); + atomic_dec(&i2400mu->do_autopm); + result = i2400m_cmd_enter_powersave(i2400m); + atomic_inc(&i2400mu->do_autopm); + if (result < 0 && !is_autosuspend) { + /* System suspend, can't fail */ + dev_err(dev, "failed to suspend, will reset on resume\n"); + result = 0; + } + if (result < 0) + goto error_enter_powersave; + i2400mu_notification_release(i2400mu); + d_printf(1, dev, "powersave requested\n"); +error_enter_powersave: +error_not_now: +no_firmware: + d_fnend(3, dev, "(iface %p pm_msg %u) = %d\n", + iface, pm_msg.event, result); + return result; +} + + +static +int i2400mu_resume(struct usb_interface *iface) +{ + int ret = 0; + struct device *dev = &iface->dev; + struct i2400mu *i2400mu = usb_get_intfdata(iface); + struct i2400m *i2400m = &i2400mu->i2400m; + + d_fnstart(3, dev, "(iface %p)\n", iface); + rmb(); /* see i2400m->updown's documentation */ + if (i2400m->updown == 0) { + d_printf(1, dev, "fw was down, no resume needed\n"); + goto out; + } + d_printf(1, dev, "fw was up, resuming\n"); + i2400mu_notification_setup(i2400mu); + /* USB has flow control, so we don't need to give it time to + * come back; otherwise, we'd use something like a get-state + * command... */ +out: + d_fnend(3, dev, "(iface %p) = %d\n", iface, ret); + return ret; +} + + +static +int i2400mu_reset_resume(struct usb_interface *iface) +{ + int result; + struct device *dev = &iface->dev; + struct i2400mu *i2400mu = usb_get_intfdata(iface); + struct i2400m *i2400m = &i2400mu->i2400m; + + d_fnstart(3, dev, "(iface %p)\n", iface); + result = i2400m_dev_reset_handle(i2400m, "device reset on resume"); + d_fnend(3, dev, "(iface %p) = %d\n", iface, result); + return result < 0 ? result : 0; +} + + +/* + * Another driver or user space is triggering a reset on the device + * which contains the interface passed as an argument. Cease IO and + * save any device state you need to restore. + * + * If you need to allocate memory here, use GFP_NOIO or GFP_ATOMIC, if + * you are in atomic context. + */ +static +int i2400mu_pre_reset(struct usb_interface *iface) +{ + struct i2400mu *i2400mu = usb_get_intfdata(iface); + return i2400m_pre_reset(&i2400mu->i2400m); +} + + +/* + * The reset has completed. Restore any saved device state and begin + * using the device again. + * + * If you need to allocate memory here, use GFP_NOIO or GFP_ATOMIC, if + * you are in atomic context. + */ +static +int i2400mu_post_reset(struct usb_interface *iface) +{ + struct i2400mu *i2400mu = usb_get_intfdata(iface); + return i2400m_post_reset(&i2400mu->i2400m); +} + + +static +struct usb_device_id i2400mu_id_table[] = { + { USB_DEVICE(0x8086, USB_DEVICE_ID_I6050) }, + { USB_DEVICE(0x8086, USB_DEVICE_ID_I6050_2) }, + { USB_DEVICE(0x8087, USB_DEVICE_ID_I6150) }, + { USB_DEVICE(0x8087, USB_DEVICE_ID_I6150_2) }, + { USB_DEVICE(0x8087, USB_DEVICE_ID_I6150_3) }, + { USB_DEVICE(0x8086, USB_DEVICE_ID_I6250) }, + { USB_DEVICE(0x8086, 0x0181) }, + { USB_DEVICE(0x8086, 0x1403) }, + { USB_DEVICE(0x8086, 0x1405) }, + { USB_DEVICE(0x8086, 0x0180) }, + { USB_DEVICE(0x8086, 0x0182) }, + { USB_DEVICE(0x8086, 0x1406) }, + { USB_DEVICE(0x8086, 0x1403) }, + { }, +}; +MODULE_DEVICE_TABLE(usb, i2400mu_id_table); + + +static +struct usb_driver i2400mu_driver = { + .name = KBUILD_MODNAME, + .suspend = i2400mu_suspend, + .resume = i2400mu_resume, + .reset_resume = i2400mu_reset_resume, + .probe = i2400mu_probe, + .disconnect = i2400mu_disconnect, + .pre_reset = i2400mu_pre_reset, + .post_reset = i2400mu_post_reset, + .id_table = i2400mu_id_table, + .supports_autosuspend = 1, +}; + +static +int __init i2400mu_driver_init(void) +{ + d_parse_params(D_LEVEL, D_LEVEL_SIZE, i2400mu_debug_params, + "i2400m_usb.debug"); + return usb_register(&i2400mu_driver); +} +module_init(i2400mu_driver_init); + + +static +void __exit i2400mu_driver_exit(void) +{ + usb_deregister(&i2400mu_driver); +} +module_exit(i2400mu_driver_exit); + +MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>"); +MODULE_DESCRIPTION("Driver for USB based Intel Wireless WiMAX Connection 2400M " + "(5x50 & 6050)"); +MODULE_LICENSE("GPL"); +MODULE_FIRMWARE(I2400MU_FW_FILE_NAME_v1_5); +MODULE_FIRMWARE(I6050U_FW_FILE_NAME_v1_5); |