From 97a6f772f36b7f52bcfa56a581bbd2470cffe23d Mon Sep 17 00:00:00 2001 From: Christian Gromm Date: Fri, 31 Jul 2020 14:20:58 +0200 Subject: drivers: most: add USB adapter driver This patch adds the USB driver source file most_usb.c and modifies the Makefile and Kconfig accordingly. Signed-off-by: Christian Gromm Link: https://lore.kernel.org/r/1596198058-26541-1-git-send-email-christian.gromm@microchip.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/most/Kconfig | 2 - drivers/staging/most/usb/Kconfig | 13 - drivers/staging/most/usb/Makefile | 4 - drivers/staging/most/usb/usb.c | 1170 ------------------------------------- 4 files changed, 1189 deletions(-) delete mode 100644 drivers/staging/most/usb/Kconfig delete mode 100644 drivers/staging/most/usb/Makefile delete mode 100644 drivers/staging/most/usb/usb.c (limited to 'drivers/staging/most') diff --git a/drivers/staging/most/Kconfig b/drivers/staging/most/Kconfig index c5a99f750abe..c35fb34fae79 100644 --- a/drivers/staging/most/Kconfig +++ b/drivers/staging/most/Kconfig @@ -30,6 +30,4 @@ source "drivers/staging/most/dim2/Kconfig" source "drivers/staging/most/i2c/Kconfig" -source "drivers/staging/most/usb/Kconfig" - endif diff --git a/drivers/staging/most/usb/Kconfig b/drivers/staging/most/usb/Kconfig deleted file mode 100644 index a47a973dfb1d..000000000000 --- a/drivers/staging/most/usb/Kconfig +++ /dev/null @@ -1,13 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# MOST USB configuration -# - -config MOST_USB - tristate "USB" - depends on USB - help - Say Y here if you want to connect via USB to network transceiver. - - To compile this driver as a module, choose M here: the - module will be called most_usb. diff --git a/drivers/staging/most/usb/Makefile b/drivers/staging/most/usb/Makefile deleted file mode 100644 index c2b207339aec..000000000000 --- a/drivers/staging/most/usb/Makefile +++ /dev/null @@ -1,4 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -obj-$(CONFIG_MOST_USB) += most_usb.o - -most_usb-objs := usb.o diff --git a/drivers/staging/most/usb/usb.c b/drivers/staging/most/usb/usb.c deleted file mode 100644 index 2640c5b326a4..000000000000 --- a/drivers/staging/most/usb/usb.c +++ /dev/null @@ -1,1170 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * usb.c - Hardware dependent module for USB - * - * Copyright (C) 2013-2015 Microchip Technology Germany II GmbH & Co. KG - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define USB_MTU 512 -#define NO_ISOCHRONOUS_URB 0 -#define AV_PACKETS_PER_XACT 2 -#define BUF_CHAIN_SIZE 0xFFFF -#define MAX_NUM_ENDPOINTS 30 -#define MAX_SUFFIX_LEN 10 -#define MAX_STRING_LEN 80 -#define MAX_BUF_SIZE 0xFFFF - -#define USB_VENDOR_ID_SMSC 0x0424 /* VID: SMSC */ -#define USB_DEV_ID_BRDG 0xC001 /* PID: USB Bridge */ -#define USB_DEV_ID_OS81118 0xCF18 /* PID: USB OS81118 */ -#define USB_DEV_ID_OS81119 0xCF19 /* PID: USB OS81119 */ -#define USB_DEV_ID_OS81210 0xCF30 /* PID: USB OS81210 */ -/* DRCI Addresses */ -#define DRCI_REG_NI_STATE 0x0100 -#define DRCI_REG_PACKET_BW 0x0101 -#define DRCI_REG_NODE_ADDR 0x0102 -#define DRCI_REG_NODE_POS 0x0103 -#define DRCI_REG_MEP_FILTER 0x0140 -#define DRCI_REG_HASH_TBL0 0x0141 -#define DRCI_REG_HASH_TBL1 0x0142 -#define DRCI_REG_HASH_TBL2 0x0143 -#define DRCI_REG_HASH_TBL3 0x0144 -#define DRCI_REG_HW_ADDR_HI 0x0145 -#define DRCI_REG_HW_ADDR_MI 0x0146 -#define DRCI_REG_HW_ADDR_LO 0x0147 -#define DRCI_REG_BASE 0x1100 -#define DRCI_COMMAND 0x02 -#define DRCI_READ_REQ 0xA0 -#define DRCI_WRITE_REQ 0xA1 - -/** - * struct most_dci_obj - Direct Communication Interface - * @kobj:position in sysfs - * @usb_device: pointer to the usb device - * @reg_addr: register address for arbitrary DCI access - */ -struct most_dci_obj { - struct device dev; - struct usb_device *usb_device; - u16 reg_addr; -}; - -#define to_dci_obj(p) container_of(p, struct most_dci_obj, dev) - -struct most_dev; - -struct clear_hold_work { - struct work_struct ws; - struct most_dev *mdev; - unsigned int channel; - int pipe; -}; - -#define to_clear_hold_work(w) container_of(w, struct clear_hold_work, ws) - -/** - * struct most_dev - holds all usb interface specific stuff - * @usb_device: pointer to usb device - * @iface: hardware interface - * @cap: channel capabilities - * @conf: channel configuration - * @dci: direct communication interface of hardware - * @ep_address: endpoint address table - * @description: device description - * @suffix: suffix for channel name - * @channel_lock: synchronize channel access - * @padding_active: indicates channel uses padding - * @is_channel_healthy: health status table of each channel - * @busy_urbs: list of anchored items - * @io_mutex: synchronize I/O with disconnect - * @link_stat_timer: timer for link status reports - * @poll_work_obj: work for polling link status - */ -struct most_dev { - struct device dev; - struct usb_device *usb_device; - struct most_interface iface; - struct most_channel_capability *cap; - struct most_channel_config *conf; - struct most_dci_obj *dci; - u8 *ep_address; - char description[MAX_STRING_LEN]; - char suffix[MAX_NUM_ENDPOINTS][MAX_SUFFIX_LEN]; - spinlock_t channel_lock[MAX_NUM_ENDPOINTS]; /* sync channel access */ - bool padding_active[MAX_NUM_ENDPOINTS]; - bool is_channel_healthy[MAX_NUM_ENDPOINTS]; - struct clear_hold_work clear_work[MAX_NUM_ENDPOINTS]; - struct usb_anchor *busy_urbs; - struct mutex io_mutex; - struct timer_list link_stat_timer; - struct work_struct poll_work_obj; - void (*on_netinfo)(struct most_interface *most_iface, - unsigned char link_state, unsigned char *addrs); -}; - -#define to_mdev(d) container_of(d, struct most_dev, iface) -#define to_mdev_from_dev(d) container_of(d, struct most_dev, dev) -#define to_mdev_from_work(w) container_of(w, struct most_dev, poll_work_obj) - -static void wq_clear_halt(struct work_struct *wq_obj); -static void wq_netinfo(struct work_struct *wq_obj); - -/** - * drci_rd_reg - read a DCI register - * @dev: usb device - * @reg: register address - * @buf: buffer to store data - * - * This is reads data from INIC's direct register communication interface - */ -static inline int drci_rd_reg(struct usb_device *dev, u16 reg, u16 *buf) -{ - int retval; - __le16 *dma_buf; - u8 req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE; - - dma_buf = kzalloc(sizeof(*dma_buf), GFP_KERNEL); - if (!dma_buf) - return -ENOMEM; - - retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), - DRCI_READ_REQ, req_type, - 0x0000, - reg, dma_buf, sizeof(*dma_buf), 5 * HZ); - *buf = le16_to_cpu(*dma_buf); - kfree(dma_buf); - - if (retval < 0) - return retval; - return 0; -} - -/** - * drci_wr_reg - write a DCI register - * @dev: usb device - * @reg: register address - * @data: data to write - * - * This is writes data to INIC's direct register communication interface - */ -static inline int drci_wr_reg(struct usb_device *dev, u16 reg, u16 data) -{ - return usb_control_msg(dev, - usb_sndctrlpipe(dev, 0), - DRCI_WRITE_REQ, - USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - data, - reg, - NULL, - 0, - 5 * HZ); -} - -static inline int start_sync_ep(struct usb_device *usb_dev, u16 ep) -{ - return drci_wr_reg(usb_dev, DRCI_REG_BASE + DRCI_COMMAND + ep * 16, 1); -} - -/** - * get_stream_frame_size - calculate frame size of current configuration - * @dev: device structure - * @cfg: channel configuration - */ -static unsigned int get_stream_frame_size(struct device *dev, - struct most_channel_config *cfg) -{ - unsigned int frame_size; - unsigned int sub_size = cfg->subbuffer_size; - - if (!sub_size) { - dev_warn(dev, "Misconfig: Subbuffer size zero.\n"); - return 0; - } - switch (cfg->data_type) { - case MOST_CH_ISOC: - frame_size = AV_PACKETS_PER_XACT * sub_size; - break; - case MOST_CH_SYNC: - if (cfg->packets_per_xact == 0) { - dev_warn(dev, "Misconfig: Packets per XACT zero\n"); - frame_size = 0; - } else if (cfg->packets_per_xact == 0xFF) { - frame_size = (USB_MTU / sub_size) * sub_size; - } else { - frame_size = cfg->packets_per_xact * sub_size; - } - break; - default: - dev_warn(dev, "Query frame size of non-streaming channel\n"); - frame_size = 0; - break; - } - return frame_size; -} - -/** - * hdm_poison_channel - mark buffers of this channel as invalid - * @iface: pointer to the interface - * @channel: channel ID - * - * This unlinks all URBs submitted to the HCD, - * calls the associated completion function of the core and removes - * them from the list. - * - * Returns 0 on success or error code otherwise. - */ -static int hdm_poison_channel(struct most_interface *iface, int channel) -{ - struct most_dev *mdev = to_mdev(iface); - unsigned long flags; - spinlock_t *lock; /* temp. lock */ - - if (channel < 0 || channel >= iface->num_channels) { - dev_warn(&mdev->usb_device->dev, "Channel ID out of range.\n"); - return -ECHRNG; - } - - lock = mdev->channel_lock + channel; - spin_lock_irqsave(lock, flags); - mdev->is_channel_healthy[channel] = false; - spin_unlock_irqrestore(lock, flags); - - cancel_work_sync(&mdev->clear_work[channel].ws); - - mutex_lock(&mdev->io_mutex); - usb_kill_anchored_urbs(&mdev->busy_urbs[channel]); - if (mdev->padding_active[channel]) - mdev->padding_active[channel] = false; - - if (mdev->conf[channel].data_type == MOST_CH_ASYNC) { - del_timer_sync(&mdev->link_stat_timer); - cancel_work_sync(&mdev->poll_work_obj); - } - mutex_unlock(&mdev->io_mutex); - return 0; -} - -/** - * hdm_add_padding - add padding bytes - * @mdev: most device - * @channel: channel ID - * @mbo: buffer object - * - * This inserts the INIC hardware specific padding bytes into a streaming - * channel's buffer - */ -static int hdm_add_padding(struct most_dev *mdev, int channel, struct mbo *mbo) -{ - struct most_channel_config *conf = &mdev->conf[channel]; - unsigned int frame_size = get_stream_frame_size(&mdev->dev, conf); - unsigned int j, num_frames; - - if (!frame_size) - return -EINVAL; - num_frames = mbo->buffer_length / frame_size; - - if (num_frames < 1) { - dev_err(&mdev->usb_device->dev, - "Missed minimal transfer unit.\n"); - return -EINVAL; - } - - for (j = num_frames - 1; j > 0; j--) - memmove(mbo->virt_address + j * USB_MTU, - mbo->virt_address + j * frame_size, - frame_size); - mbo->buffer_length = num_frames * USB_MTU; - return 0; -} - -/** - * hdm_remove_padding - remove padding bytes - * @mdev: most device - * @channel: channel ID - * @mbo: buffer object - * - * This takes the INIC hardware specific padding bytes off a streaming - * channel's buffer. - */ -static int hdm_remove_padding(struct most_dev *mdev, int channel, - struct mbo *mbo) -{ - struct most_channel_config *const conf = &mdev->conf[channel]; - unsigned int frame_size = get_stream_frame_size(&mdev->dev, conf); - unsigned int j, num_frames; - - if (!frame_size) - return -EINVAL; - num_frames = mbo->processed_length / USB_MTU; - - for (j = 1; j < num_frames; j++) - memmove(mbo->virt_address + frame_size * j, - mbo->virt_address + USB_MTU * j, - frame_size); - - mbo->processed_length = frame_size * num_frames; - return 0; -} - -/** - * hdm_write_completion - completion function for submitted Tx URBs - * @urb: the URB that has been completed - * - * This checks the status of the completed URB. In case the URB has been - * unlinked before, it is immediately freed. On any other error the MBO - * transfer flag is set. On success it frees allocated resources and calls - * the completion function. - * - * Context: interrupt! - */ -static void hdm_write_completion(struct urb *urb) -{ - struct mbo *mbo = urb->context; - struct most_dev *mdev = to_mdev(mbo->ifp); - unsigned int channel = mbo->hdm_channel_id; - spinlock_t *lock = mdev->channel_lock + channel; - unsigned long flags; - - spin_lock_irqsave(lock, flags); - - mbo->processed_length = 0; - mbo->status = MBO_E_INVAL; - if (likely(mdev->is_channel_healthy[channel])) { - switch (urb->status) { - case 0: - case -ESHUTDOWN: - mbo->processed_length = urb->actual_length; - mbo->status = MBO_SUCCESS; - break; - case -EPIPE: - dev_warn(&mdev->usb_device->dev, - "Broken pipe on ep%02x\n", - mdev->ep_address[channel]); - mdev->is_channel_healthy[channel] = false; - mdev->clear_work[channel].pipe = urb->pipe; - schedule_work(&mdev->clear_work[channel].ws); - break; - case -ENODEV: - case -EPROTO: - mbo->status = MBO_E_CLOSE; - break; - } - } - - spin_unlock_irqrestore(lock, flags); - - if (likely(mbo->complete)) - mbo->complete(mbo); - usb_free_urb(urb); -} - -/** - * hdm_read_completion - completion function for submitted Rx URBs - * @urb: the URB that has been completed - * - * This checks the status of the completed URB. In case the URB has been - * unlinked before it is immediately freed. On any other error the MBO transfer - * flag is set. On success it frees allocated resources, removes - * padding bytes -if necessary- and calls the completion function. - * - * Context: interrupt! - */ -static void hdm_read_completion(struct urb *urb) -{ - struct mbo *mbo = urb->context; - struct most_dev *mdev = to_mdev(mbo->ifp); - unsigned int channel = mbo->hdm_channel_id; - struct device *dev = &mdev->usb_device->dev; - spinlock_t *lock = mdev->channel_lock + channel; - unsigned long flags; - - spin_lock_irqsave(lock, flags); - - mbo->processed_length = 0; - mbo->status = MBO_E_INVAL; - if (likely(mdev->is_channel_healthy[channel])) { - switch (urb->status) { - case 0: - case -ESHUTDOWN: - mbo->processed_length = urb->actual_length; - mbo->status = MBO_SUCCESS; - if (mdev->padding_active[channel] && - hdm_remove_padding(mdev, channel, mbo)) { - mbo->processed_length = 0; - mbo->status = MBO_E_INVAL; - } - break; - case -EPIPE: - dev_warn(dev, "Broken pipe on ep%02x\n", - mdev->ep_address[channel]); - mdev->is_channel_healthy[channel] = false; - mdev->clear_work[channel].pipe = urb->pipe; - schedule_work(&mdev->clear_work[channel].ws); - break; - case -ENODEV: - case -EPROTO: - mbo->status = MBO_E_CLOSE; - break; - case -EOVERFLOW: - dev_warn(dev, "Babble on ep%02x\n", - mdev->ep_address[channel]); - break; - } - } - - spin_unlock_irqrestore(lock, flags); - - if (likely(mbo->complete)) - mbo->complete(mbo); - usb_free_urb(urb); -} - -/** - * hdm_enqueue - receive a buffer to be used for data transfer - * @iface: interface to enqueue to - * @channel: ID of the channel - * @mbo: pointer to the buffer object - * - * This allocates a new URB and fills it according to the channel - * that is being used for transmission of data. Before the URB is - * submitted it is stored in the private anchor list. - * - * Returns 0 on success. On any error the URB is freed and a error code - * is returned. - * - * Context: Could in _some_ cases be interrupt! - */ -static int hdm_enqueue(struct most_interface *iface, int channel, - struct mbo *mbo) -{ - struct most_dev *mdev = to_mdev(iface); - struct most_channel_config *conf; - int retval = 0; - struct urb *urb; - unsigned long length; - void *virt_address; - - if (!mbo) - return -EINVAL; - if (iface->num_channels <= channel || channel < 0) - return -ECHRNG; - - urb = usb_alloc_urb(NO_ISOCHRONOUS_URB, GFP_KERNEL); - if (!urb) - return -ENOMEM; - - conf = &mdev->conf[channel]; - - mutex_lock(&mdev->io_mutex); - if (!mdev->usb_device) { - retval = -ENODEV; - goto err_free_urb; - } - - if ((conf->direction & MOST_CH_TX) && mdev->padding_active[channel] && - hdm_add_padding(mdev, channel, mbo)) { - retval = -EINVAL; - goto err_free_urb; - } - - urb->transfer_dma = mbo->bus_address; - virt_address = mbo->virt_address; - length = mbo->buffer_length; - - if (conf->direction & MOST_CH_TX) { - usb_fill_bulk_urb(urb, mdev->usb_device, - usb_sndbulkpipe(mdev->usb_device, - mdev->ep_address[channel]), - virt_address, - length, - hdm_write_completion, - mbo); - if (conf->data_type != MOST_CH_ISOC && - conf->data_type != MOST_CH_SYNC) - urb->transfer_flags |= URB_ZERO_PACKET; - } else { - usb_fill_bulk_urb(urb, mdev->usb_device, - usb_rcvbulkpipe(mdev->usb_device, - mdev->ep_address[channel]), - virt_address, - length + conf->extra_len, - hdm_read_completion, - mbo); - } - urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - - usb_anchor_urb(urb, &mdev->busy_urbs[channel]); - - retval = usb_submit_urb(urb, GFP_KERNEL); - if (retval) { - dev_err(&mdev->usb_device->dev, - "URB submit failed with error %d.\n", retval); - goto err_unanchor_urb; - } - mutex_unlock(&mdev->io_mutex); - return 0; - -err_unanchor_urb: - usb_unanchor_urb(urb); -err_free_urb: - usb_free_urb(urb); - mutex_unlock(&mdev->io_mutex); - return retval; -} - -static void *hdm_dma_alloc(struct mbo *mbo, u32 size) -{ - struct most_dev *mdev = to_mdev(mbo->ifp); - - return usb_alloc_coherent(mdev->usb_device, size, GFP_KERNEL, - &mbo->bus_address); -} - -static void hdm_dma_free(struct mbo *mbo, u32 size) -{ - struct most_dev *mdev = to_mdev(mbo->ifp); - - usb_free_coherent(mdev->usb_device, size, mbo->virt_address, - mbo->bus_address); -} - -/** - * hdm_configure_channel - receive channel configuration from core - * @iface: interface - * @channel: channel ID - * @conf: structure that holds the configuration information - * - * The attached network interface controller (NIC) supports a padding mode - * to avoid short packets on USB, hence increasing the performance due to a - * lower interrupt load. This mode is default for synchronous data and can - * be switched on for isochronous data. In case padding is active the - * driver needs to know the frame size of the payload in order to calculate - * the number of bytes it needs to pad when transmitting or to cut off when - * receiving data. - * - */ -static int hdm_configure_channel(struct most_interface *iface, int channel, - struct most_channel_config *conf) -{ - unsigned int num_frames; - unsigned int frame_size; - struct most_dev *mdev = to_mdev(iface); - struct device *dev = &mdev->usb_device->dev; - - if (!conf) { - dev_err(dev, "Bad config pointer.\n"); - return -EINVAL; - } - if (channel < 0 || channel >= iface->num_channels) { - dev_err(dev, "Channel ID out of range.\n"); - return -EINVAL; - } - - mdev->is_channel_healthy[channel] = true; - mdev->clear_work[channel].channel = channel; - mdev->clear_work[channel].mdev = mdev; - INIT_WORK(&mdev->clear_work[channel].ws, wq_clear_halt); - - if (!conf->num_buffers || !conf->buffer_size) { - dev_err(dev, "Misconfig: buffer size or #buffers zero.\n"); - return -EINVAL; - } - - if (conf->data_type != MOST_CH_SYNC && - !(conf->data_type == MOST_CH_ISOC && - conf->packets_per_xact != 0xFF)) { - mdev->padding_active[channel] = false; - /* - * Since the NIC's padding mode is not going to be - * used, we can skip the frame size calculations and - * move directly on to exit. - */ - goto exit; - } - - mdev->padding_active[channel] = true; - - frame_size = get_stream_frame_size(&mdev->dev, conf); - if (frame_size == 0 || frame_size > USB_MTU) { - dev_warn(dev, "Misconfig: frame size wrong\n"); - return -EINVAL; - } - - num_frames = conf->buffer_size / frame_size; - - if (conf->buffer_size % frame_size) { - u16 old_size = conf->buffer_size; - - conf->buffer_size = num_frames * frame_size; - dev_warn(dev, "%s: fixed buffer size (%d -> %d)\n", - mdev->suffix[channel], old_size, conf->buffer_size); - } - - /* calculate extra length to comply w/ HW padding */ - conf->extra_len = num_frames * (USB_MTU - frame_size); - -exit: - mdev->conf[channel] = *conf; - if (conf->data_type == MOST_CH_ASYNC) { - u16 ep = mdev->ep_address[channel]; - - if (start_sync_ep(mdev->usb_device, ep) < 0) - dev_warn(dev, "sync for ep%02x failed", ep); - } - return 0; -} - -/** - * hdm_request_netinfo - request network information - * @iface: pointer to interface - * @channel: channel ID - * - * This is used as trigger to set up the link status timer that - * polls for the NI state of the INIC every 2 seconds. - * - */ -static void hdm_request_netinfo(struct most_interface *iface, int channel, - void (*on_netinfo)(struct most_interface *, - unsigned char, - unsigned char *)) -{ - struct most_dev *mdev = to_mdev(iface); - - mdev->on_netinfo = on_netinfo; - if (!on_netinfo) - return; - - mdev->link_stat_timer.expires = jiffies + HZ; - mod_timer(&mdev->link_stat_timer, mdev->link_stat_timer.expires); -} - -/** - * link_stat_timer_handler - schedule work obtaining mac address and link status - * @data: pointer to USB device instance - * - * The handler runs in interrupt context. That's why we need to defer the - * tasks to a work queue. - */ -static void link_stat_timer_handler(struct timer_list *t) -{ - struct most_dev *mdev = from_timer(mdev, t, link_stat_timer); - - schedule_work(&mdev->poll_work_obj); - mdev->link_stat_timer.expires = jiffies + (2 * HZ); - add_timer(&mdev->link_stat_timer); -} - -/** - * wq_netinfo - work queue function to deliver latest networking information - * @wq_obj: object that holds data for our deferred work to do - * - * This retrieves the network interface status of the USB INIC - */ -static void wq_netinfo(struct work_struct *wq_obj) -{ - struct most_dev *mdev = to_mdev_from_work(wq_obj); - struct usb_device *usb_device = mdev->usb_device; - struct device *dev = &usb_device->dev; - u16 hi, mi, lo, link; - u8 hw_addr[6]; - - if (drci_rd_reg(usb_device, DRCI_REG_HW_ADDR_HI, &hi)) { - dev_err(dev, "Vendor request 'hw_addr_hi' failed\n"); - return; - } - - if (drci_rd_reg(usb_device, DRCI_REG_HW_ADDR_MI, &mi)) { - dev_err(dev, "Vendor request 'hw_addr_mid' failed\n"); - return; - } - - if (drci_rd_reg(usb_device, DRCI_REG_HW_ADDR_LO, &lo)) { - dev_err(dev, "Vendor request 'hw_addr_low' failed\n"); - return; - } - - if (drci_rd_reg(usb_device, DRCI_REG_NI_STATE, &link)) { - dev_err(dev, "Vendor request 'link status' failed\n"); - return; - } - - hw_addr[0] = hi >> 8; - hw_addr[1] = hi; - hw_addr[2] = mi >> 8; - hw_addr[3] = mi; - hw_addr[4] = lo >> 8; - hw_addr[5] = lo; - - if (mdev->on_netinfo) - mdev->on_netinfo(&mdev->iface, link, hw_addr); -} - -/** - * wq_clear_halt - work queue function - * @wq_obj: work_struct object to execute - * - * This sends a clear_halt to the given USB pipe. - */ -static void wq_clear_halt(struct work_struct *wq_obj) -{ - struct clear_hold_work *clear_work = to_clear_hold_work(wq_obj); - struct most_dev *mdev = clear_work->mdev; - unsigned int channel = clear_work->channel; - int pipe = clear_work->pipe; - int snd_pipe; - int peer; - - mutex_lock(&mdev->io_mutex); - most_stop_enqueue(&mdev->iface, channel); - usb_kill_anchored_urbs(&mdev->busy_urbs[channel]); - if (usb_clear_halt(mdev->usb_device, pipe)) - dev_warn(&mdev->usb_device->dev, "Failed to reset endpoint.\n"); - - /* If the functional Stall condition has been set on an - * asynchronous rx channel, we need to clear the tx channel - * too, since the hardware runs its clean-up sequence on both - * channels, as they are physically one on the network. - * - * The USB interface that exposes the asynchronous channels - * contains always two endpoints, and two only. - */ - if (mdev->conf[channel].data_type == MOST_CH_ASYNC && - mdev->conf[channel].direction == MOST_CH_RX) { - if (channel == 0) - peer = 1; - else - peer = 0; - snd_pipe = usb_sndbulkpipe(mdev->usb_device, - mdev->ep_address[peer]); - usb_clear_halt(mdev->usb_device, snd_pipe); - } - mdev->is_channel_healthy[channel] = true; - most_resume_enqueue(&mdev->iface, channel); - mutex_unlock(&mdev->io_mutex); -} - -/** - * hdm_usb_fops - file operation table for USB driver - */ -static const struct file_operations hdm_usb_fops = { - .owner = THIS_MODULE, -}; - -/** - * usb_device_id - ID table for HCD device probing - */ -static const struct usb_device_id usbid[] = { - { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_BRDG), }, - { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_OS81118), }, - { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_OS81119), }, - { USB_DEVICE(USB_VENDOR_ID_SMSC, USB_DEV_ID_OS81210), }, - { } /* Terminating entry */ -}; - -struct regs { - const char *name; - u16 reg; -}; - -static const struct regs ro_regs[] = { - { "ni_state", DRCI_REG_NI_STATE }, - { "packet_bandwidth", DRCI_REG_PACKET_BW }, - { "node_address", DRCI_REG_NODE_ADDR }, - { "node_position", DRCI_REG_NODE_POS }, -}; - -static const struct regs rw_regs[] = { - { "mep_filter", DRCI_REG_MEP_FILTER }, - { "mep_hash0", DRCI_REG_HASH_TBL0 }, - { "mep_hash1", DRCI_REG_HASH_TBL1 }, - { "mep_hash2", DRCI_REG_HASH_TBL2 }, - { "mep_hash3", DRCI_REG_HASH_TBL3 }, - { "mep_eui48_hi", DRCI_REG_HW_ADDR_HI }, - { "mep_eui48_mi", DRCI_REG_HW_ADDR_MI }, - { "mep_eui48_lo", DRCI_REG_HW_ADDR_LO }, -}; - -static int get_stat_reg_addr(const struct regs *regs, int size, - const char *name, u16 *reg_addr) -{ - int i; - - for (i = 0; i < size; i++) { - if (sysfs_streq(name, regs[i].name)) { - *reg_addr = regs[i].reg; - return 0; - } - } - return -EINVAL; -} - -#define get_static_reg_addr(regs, name, reg_addr) \ - get_stat_reg_addr(regs, ARRAY_SIZE(regs), name, reg_addr) - -static ssize_t value_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - const char *name = attr->attr.name; - struct most_dci_obj *dci_obj = to_dci_obj(dev); - u16 val; - u16 reg_addr; - int err; - - if (sysfs_streq(name, "arb_address")) - return snprintf(buf, PAGE_SIZE, "%04x\n", dci_obj->reg_addr); - - if (sysfs_streq(name, "arb_value")) - reg_addr = dci_obj->reg_addr; - else if (get_static_reg_addr(ro_regs, name, ®_addr) && - get_static_reg_addr(rw_regs, name, ®_addr)) - return -EINVAL; - - err = drci_rd_reg(dci_obj->usb_device, reg_addr, &val); - if (err < 0) - return err; - - return snprintf(buf, PAGE_SIZE, "%04x\n", val); -} - -static ssize_t value_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - u16 val; - u16 reg_addr; - const char *name = attr->attr.name; - struct most_dci_obj *dci_obj = to_dci_obj(dev); - struct usb_device *usb_dev = dci_obj->usb_device; - int err; - - err = kstrtou16(buf, 16, &val); - if (err) - return err; - - if (sysfs_streq(name, "arb_address")) { - dci_obj->reg_addr = val; - return count; - } - - if (sysfs_streq(name, "arb_value")) - err = drci_wr_reg(usb_dev, dci_obj->reg_addr, val); - else if (sysfs_streq(name, "sync_ep")) - err = start_sync_ep(usb_dev, val); - else if (!get_static_reg_addr(rw_regs, name, ®_addr)) - err = drci_wr_reg(usb_dev, reg_addr, val); - else - return -EINVAL; - - if (err < 0) - return err; - - return count; -} - -static DEVICE_ATTR(ni_state, 0444, value_show, NULL); -static DEVICE_ATTR(packet_bandwidth, 0444, value_show, NULL); -static DEVICE_ATTR(node_address, 0444, value_show, NULL); -static DEVICE_ATTR(node_position, 0444, value_show, NULL); -static DEVICE_ATTR(sync_ep, 0200, NULL, value_store); -static DEVICE_ATTR(mep_filter, 0644, value_show, value_store); -static DEVICE_ATTR(mep_hash0, 0644, value_show, value_store); -static DEVICE_ATTR(mep_hash1, 0644, value_show, value_store); -static DEVICE_ATTR(mep_hash2, 0644, value_show, value_store); -static DEVICE_ATTR(mep_hash3, 0644, value_show, value_store); -static DEVICE_ATTR(mep_eui48_hi, 0644, value_show, value_store); -static DEVICE_ATTR(mep_eui48_mi, 0644, value_show, value_store); -static DEVICE_ATTR(mep_eui48_lo, 0644, value_show, value_store); -static DEVICE_ATTR(arb_address, 0644, value_show, value_store); -static DEVICE_ATTR(arb_value, 0644, value_show, value_store); - -static struct attribute *dci_attrs[] = { - &dev_attr_ni_state.attr, - &dev_attr_packet_bandwidth.attr, - &dev_attr_node_address.attr, - &dev_attr_node_position.attr, - &dev_attr_sync_ep.attr, - &dev_attr_mep_filter.attr, - &dev_attr_mep_hash0.attr, - &dev_attr_mep_hash1.attr, - &dev_attr_mep_hash2.attr, - &dev_attr_mep_hash3.attr, - &dev_attr_mep_eui48_hi.attr, - &dev_attr_mep_eui48_mi.attr, - &dev_attr_mep_eui48_lo.attr, - &dev_attr_arb_address.attr, - &dev_attr_arb_value.attr, - NULL, -}; - -ATTRIBUTE_GROUPS(dci); - -static void release_dci(struct device *dev) -{ - struct most_dci_obj *dci = to_dci_obj(dev); - - put_device(dev->parent); - kfree(dci); -} - -static void release_mdev(struct device *dev) -{ - struct most_dev *mdev = to_mdev_from_dev(dev); - - kfree(mdev); -} -/** - * hdm_probe - probe function of USB device driver - * @interface: Interface of the attached USB device - * @id: Pointer to the USB ID table. - * - * This allocates and initializes the device instance, adds the new - * entry to the internal list, scans the USB descriptors and registers - * the interface with the core. - * Additionally, the DCI objects are created and the hardware is sync'd. - * - * Return 0 on success. In case of an error a negative number is returned. - */ -static int -hdm_probe(struct usb_interface *interface, const struct usb_device_id *id) -{ - struct usb_host_interface *usb_iface_desc = interface->cur_altsetting; - struct usb_device *usb_dev = interface_to_usbdev(interface); - struct device *dev = &usb_dev->dev; - struct most_dev *mdev; - unsigned int i; - unsigned int num_endpoints; - struct most_channel_capability *tmp_cap; - struct usb_endpoint_descriptor *ep_desc; - int ret = -ENOMEM; - - mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); - if (!mdev) - return -ENOMEM; - - usb_set_intfdata(interface, mdev); - num_endpoints = usb_iface_desc->desc.bNumEndpoints; - if (num_endpoints > MAX_NUM_ENDPOINTS) { - kfree(mdev); - return -EINVAL; - } - mutex_init(&mdev->io_mutex); - INIT_WORK(&mdev->poll_work_obj, wq_netinfo); - timer_setup(&mdev->link_stat_timer, link_stat_timer_handler, 0); - - mdev->usb_device = usb_dev; - mdev->link_stat_timer.expires = jiffies + (2 * HZ); - - mdev->iface.mod = hdm_usb_fops.owner; - mdev->iface.dev = &mdev->dev; - mdev->iface.driver_dev = &interface->dev; - mdev->iface.interface = ITYPE_USB; - mdev->iface.configure = hdm_configure_channel; - mdev->iface.request_netinfo = hdm_request_netinfo; - mdev->iface.enqueue = hdm_enqueue; - mdev->iface.poison_channel = hdm_poison_channel; - mdev->iface.dma_alloc = hdm_dma_alloc; - mdev->iface.dma_free = hdm_dma_free; - mdev->iface.description = mdev->description; - mdev->iface.num_channels = num_endpoints; - - snprintf(mdev->description, sizeof(mdev->description), - "%d-%s:%d.%d", - usb_dev->bus->busnum, - usb_dev->devpath, - usb_dev->config->desc.bConfigurationValue, - usb_iface_desc->desc.bInterfaceNumber); - - mdev->dev.init_name = mdev->description; - mdev->dev.parent = &interface->dev; - mdev->dev.release = release_mdev; - mdev->conf = kcalloc(num_endpoints, sizeof(*mdev->conf), GFP_KERNEL); - if (!mdev->conf) - goto err_free_mdev; - - mdev->cap = kcalloc(num_endpoints, sizeof(*mdev->cap), GFP_KERNEL); - if (!mdev->cap) - goto err_free_conf; - - mdev->iface.channel_vector = mdev->cap; - mdev->ep_address = - kcalloc(num_endpoints, sizeof(*mdev->ep_address), GFP_KERNEL); - if (!mdev->ep_address) - goto err_free_cap; - - mdev->busy_urbs = - kcalloc(num_endpoints, sizeof(*mdev->busy_urbs), GFP_KERNEL); - if (!mdev->busy_urbs) - goto err_free_ep_address; - - tmp_cap = mdev->cap; - for (i = 0; i < num_endpoints; i++) { - ep_desc = &usb_iface_desc->endpoint[i].desc; - mdev->ep_address[i] = ep_desc->bEndpointAddress; - mdev->padding_active[i] = false; - mdev->is_channel_healthy[i] = true; - - snprintf(&mdev->suffix[i][0], MAX_SUFFIX_LEN, "ep%02x", - mdev->ep_address[i]); - - tmp_cap->name_suffix = &mdev->suffix[i][0]; - tmp_cap->buffer_size_packet = MAX_BUF_SIZE; - tmp_cap->buffer_size_streaming = MAX_BUF_SIZE; - tmp_cap->num_buffers_packet = BUF_CHAIN_SIZE; - tmp_cap->num_buffers_streaming = BUF_CHAIN_SIZE; - tmp_cap->data_type = MOST_CH_CONTROL | MOST_CH_ASYNC | - MOST_CH_ISOC | MOST_CH_SYNC; - if (usb_endpoint_dir_in(ep_desc)) - tmp_cap->direction = MOST_CH_RX; - else - tmp_cap->direction = MOST_CH_TX; - tmp_cap++; - init_usb_anchor(&mdev->busy_urbs[i]); - spin_lock_init(&mdev->channel_lock[i]); - } - dev_dbg(dev, "claimed gadget: Vendor=%4.4x ProdID=%4.4x Bus=%02x Device=%02x\n", - le16_to_cpu(usb_dev->descriptor.idVendor), - le16_to_cpu(usb_dev->descriptor.idProduct), - usb_dev->bus->busnum, - usb_dev->devnum); - - dev_dbg(dev, "device path: /sys/bus/usb/devices/%d-%s:%d.%d\n", - usb_dev->bus->busnum, - usb_dev->devpath, - usb_dev->config->desc.bConfigurationValue, - usb_iface_desc->desc.bInterfaceNumber); - - ret = most_register_interface(&mdev->iface); - if (ret) - goto err_free_busy_urbs; - - mutex_lock(&mdev->io_mutex); - if (le16_to_cpu(usb_dev->descriptor.idProduct) == USB_DEV_ID_OS81118 || - le16_to_cpu(usb_dev->descriptor.idProduct) == USB_DEV_ID_OS81119 || - le16_to_cpu(usb_dev->descriptor.idProduct) == USB_DEV_ID_OS81210) { - mdev->dci = kzalloc(sizeof(*mdev->dci), GFP_KERNEL); - if (!mdev->dci) { - mutex_unlock(&mdev->io_mutex); - most_deregister_interface(&mdev->iface); - ret = -ENOMEM; - goto err_free_busy_urbs; - } - - mdev->dci->dev.init_name = "dci"; - mdev->dci->dev.parent = get_device(mdev->iface.dev); - mdev->dci->dev.groups = dci_groups; - mdev->dci->dev.release = release_dci; - if (device_register(&mdev->dci->dev)) { - mutex_unlock(&mdev->io_mutex); - most_deregister_interface(&mdev->iface); - ret = -ENOMEM; - goto err_free_dci; - } - mdev->dci->usb_device = mdev->usb_device; - } - mutex_unlock(&mdev->io_mutex); - return 0; -err_free_dci: - put_device(&mdev->dci->dev); -err_free_busy_urbs: - kfree(mdev->busy_urbs); -err_free_ep_address: - kfree(mdev->ep_address); -err_free_cap: - kfree(mdev->cap); -err_free_conf: - kfree(mdev->conf); -err_free_mdev: - put_device(&mdev->dev); - return ret; -} - -/** - * hdm_disconnect - disconnect function of USB device driver - * @interface: Interface of the attached USB device - * - * This deregisters the interface with the core, removes the kernel timer - * and frees resources. - * - * Context: hub kernel thread - */ -static void hdm_disconnect(struct usb_interface *interface) -{ - struct most_dev *mdev = usb_get_intfdata(interface); - - mutex_lock(&mdev->io_mutex); - usb_set_intfdata(interface, NULL); - mdev->usb_device = NULL; - mutex_unlock(&mdev->io_mutex); - - del_timer_sync(&mdev->link_stat_timer); - cancel_work_sync(&mdev->poll_work_obj); - - if (mdev->dci) - device_unregister(&mdev->dci->dev); - most_deregister_interface(&mdev->iface); - - kfree(mdev->busy_urbs); - kfree(mdev->cap); - kfree(mdev->conf); - kfree(mdev->ep_address); - put_device(&mdev->dci->dev); - put_device(&mdev->dev); -} - -static int hdm_suspend(struct usb_interface *interface, pm_message_t message) -{ - struct most_dev *mdev = usb_get_intfdata(interface); - int i; - - mutex_lock(&mdev->io_mutex); - for (i = 0; i < mdev->iface.num_channels; i++) { - most_stop_enqueue(&mdev->iface, i); - usb_kill_anchored_urbs(&mdev->busy_urbs[i]); - } - mutex_unlock(&mdev->io_mutex); - return 0; -} - -static int hdm_resume(struct usb_interface *interface) -{ - struct most_dev *mdev = usb_get_intfdata(interface); - int i; - - mutex_lock(&mdev->io_mutex); - for (i = 0; i < mdev->iface.num_channels; i++) - most_resume_enqueue(&mdev->iface, i); - mutex_unlock(&mdev->io_mutex); - return 0; -} - -static struct usb_driver hdm_usb = { - .name = "hdm_usb", - .id_table = usbid, - .probe = hdm_probe, - .disconnect = hdm_disconnect, - .resume = hdm_resume, - .suspend = hdm_suspend, -}; - -module_usb_driver(hdm_usb); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Christian Gromm "); -MODULE_DESCRIPTION("HDM_4_USB"); -- cgit v1.2.3