diff options
Diffstat (limited to 'drivers/staging/rts5139/rts51x.c')
| -rw-r--r-- | drivers/staging/rts5139/rts51x.c | 967 |
1 files changed, 967 insertions, 0 deletions
diff --git a/drivers/staging/rts5139/rts51x.c b/drivers/staging/rts5139/rts51x.c new file mode 100644 index 000000000000..d9cee6d0b124 --- /dev/null +++ b/drivers/staging/rts5139/rts51x.c @@ -0,0 +1,967 @@ +/* Driver for Realtek RTS51xx USB card reader + * + * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, 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, see <http://www.gnu.org/licenses/>. + * + * Author: + * wwang (wei_wang@realsil.com.cn) + * No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China + * Maintainer: + * Edwin Rong (edwin_rong@realsil.com.cn) + * No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China + */ + +#include <linux/blkdev.h> +#include <linux/kthread.h> +#include <linux/sched.h> +#include <linux/workqueue.h> +#include <linux/errno.h> +#include <linux/freezer.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/mutex.h> +#include <linux/utsname.h> +#include <linux/usb.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_devinfo.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_host.h> + +#include "debug.h" +#include "ms.h" +#include "rts51x.h" +#include "rts51x_chip.h" +#include "rts51x_card.h" +#include "rts51x_scsi.h" +#include "rts51x_transport.h" +#include "rts51x_fop.h" + +MODULE_DESCRIPTION(RTS51X_DESC); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRIVER_VERSION); + +#ifdef SCSI_SCAN_DELAY +static unsigned int delay_use = 5; +module_param(delay_use, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); +#endif + +static int auto_delink_en; +module_param(auto_delink_en, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(auto_delink_en, "enable auto delink"); + +static int ss_en; +module_param(ss_en, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(ss_en, "enable selective suspend"); + +static int ss_delay = 50; +module_param(ss_delay, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(ss_delay, + "seconds to delay before entering selective suspend"); + +static int needs_remote_wakeup; +module_param(needs_remote_wakeup, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(needs_remote_wakeup, "ss state needs remote wakeup supported"); + +#ifdef SUPPORT_FILE_OP +static const struct file_operations rts51x_fops = { + .owner = THIS_MODULE, + .read = rts51x_read, + .write = rts51x_write, + .unlocked_ioctl = rts51x_ioctl, + .open = rts51x_open, + .release = rts51x_release, +}; + +/* + * usb class driver info in order to get a minor number from the usb core, + * and to have the device registered with the driver core + */ +static struct usb_class_driver rts51x_class = { + .name = "rts51x%d", + .fops = &rts51x_fops, + .minor_base = 192, +}; +#endif + +#ifdef CONFIG_PM /* Minimal support for suspend and resume */ + +static inline void usb_autopm_enable(struct usb_interface *intf) +{ + atomic_set(&intf->pm_usage_cnt, 1); + usb_autopm_put_interface(intf); +} + +static inline void usb_autopm_disable(struct usb_interface *intf) +{ + atomic_set(&intf->pm_usage_cnt, 0); + usb_autopm_get_interface(intf); +} + +void rts51x_try_to_enter_ss(struct rts51x_chip *chip) +{ + RTS51X_DEBUGP("Ready to enter SS state\n"); + usb_autopm_enable(chip->usb->pusb_intf); +} + +void rts51x_try_to_exit_ss(struct rts51x_chip *chip) +{ + RTS51X_DEBUGP("Exit from SS state\n"); + usb_autopm_disable(chip->usb->pusb_intf); +} + +int rts51x_suspend(struct usb_interface *iface, pm_message_t message) +{ + struct rts51x_chip *chip = usb_get_intfdata(iface); + + RTS51X_DEBUGP("%s, message.event = 0x%x\n", __func__, message.event); + + /* Wait until no command is running */ + mutex_lock(&chip->usb->dev_mutex); + + chip->fake_card_ready = chip->card_ready; + rts51x_do_before_power_down(chip); + + if (message.event == PM_EVENT_AUTO_SUSPEND) { + RTS51X_DEBUGP("Enter SS state"); + chip->resume_from_scsi = 0; + RTS51X_SET_STAT(chip, STAT_SS); + } else { + RTS51X_DEBUGP("Enter SUSPEND state"); + RTS51X_SET_STAT(chip, STAT_SUSPEND); + } + + /* When runtime PM is working, we'll set a flag to indicate + * whether we should autoresume when a SCSI request arrives. */ + + mutex_unlock(&chip->usb->dev_mutex); + return 0; +} + +int rts51x_resume(struct usb_interface *iface) +{ + struct rts51x_chip *chip = usb_get_intfdata(iface); + + RTS51X_DEBUGP("%s\n", __func__); + + if (!RTS51X_CHK_STAT(chip, STAT_SS) || !chip->resume_from_scsi) { + mutex_lock(&chip->usb->dev_mutex); + + if (chip->option.ss_en) { + if (GET_PM_USAGE_CNT(chip) <= 0) { + /* Remote wake up, increase pm_usage_cnt */ + RTS51X_DEBUGP("Incr pm_usage_cnt\n"); + SET_PM_USAGE_CNT(chip, 1); + } + } + + RTS51X_SET_STAT(chip, STAT_RUN); + + rts51x_init_chip(chip); + rts51x_init_cards(chip); + + mutex_unlock(&chip->usb->dev_mutex); + } + + return 0; +} + +int rts51x_reset_resume(struct usb_interface *iface) +{ + struct rts51x_chip *chip = usb_get_intfdata(iface); + + RTS51X_DEBUGP("%s\n", __func__); + + mutex_lock(&chip->usb->dev_mutex); + + RTS51X_SET_STAT(chip, STAT_RUN); + + if (chip->option.ss_en) + SET_PM_USAGE_CNT(chip, 1); + + rts51x_init_chip(chip); + rts51x_init_cards(chip); + + mutex_unlock(&chip->usb->dev_mutex); + + /* FIXME: Notify the subdrivers that they need to reinitialize + * the device */ + return 0; +} + +#else /* CONFIG_PM */ + +void rts51x_try_to_enter_ss(struct rts51x_chip *chip) +{ +} + +void rts51x_try_to_exit_ss(struct rts51x_chip *chip) +{ +} + +#endif /* CONFIG_PM */ + +/* + * The next two routines get called just before and just after + * a USB port reset, whether from this driver or a different one. + */ + +int rts51x_pre_reset(struct usb_interface *iface) +{ + struct rts51x_chip *chip = usb_get_intfdata(iface); + + RTS51X_DEBUGP("%s\n", __func__); + + /* Make sure no command runs during the reset */ + mutex_lock(&chip->usb->dev_mutex); + return 0; +} + +int rts51x_post_reset(struct usb_interface *iface) +{ + struct rts51x_chip *chip = usb_get_intfdata(iface); + + RTS51X_DEBUGP("%s\n", __func__); + + /* Report the reset to the SCSI core */ + /* usb_stor_report_bus_reset(us); */ + + /* FIXME: Notify the subdrivers that they need to reinitialize + * the device */ + + mutex_unlock(&chip->usb->dev_mutex); + return 0; +} + +static int rts51x_control_thread(void *__chip) +{ + struct rts51x_chip *chip = (struct rts51x_chip *)__chip; + struct Scsi_Host *host = rts51x_to_host(chip); + + for (;;) { + if (wait_for_completion_interruptible(&chip->usb->cmnd_ready)) + break; + + if (test_bit(FLIDX_DISCONNECTING, &chip->usb->dflags)) { + RTS51X_DEBUGP("-- exiting from rts51x-control\n"); + break; + } + + /* lock the device pointers */ + mutex_lock(&(chip->usb->dev_mutex)); + + /* lock access to the state */ + scsi_lock(host); + + /* When we are called with no command pending, we're done */ + if (chip->srb == NULL) { + scsi_unlock(host); + mutex_unlock(&chip->usb->dev_mutex); + RTS51X_DEBUGP("-- exiting from control thread\n"); + break; + } + + /* has the command timed out *already* ? */ + if (test_bit(FLIDX_TIMED_OUT, &chip->usb->dflags)) { + chip->srb->result = DID_ABORT << 16; + goto SkipForAbort; + } + + scsi_unlock(host); + + /* reject the command if the direction indicator + * is UNKNOWN + */ + if (chip->srb->sc_data_direction == DMA_BIDIRECTIONAL) { + RTS51X_DEBUGP("UNKNOWN data direction\n"); + chip->srb->result = DID_ERROR << 16; + } + + /* reject if target != 0 or if LUN is higher than + * the maximum known LUN + */ + else if (chip->srb->device->id) { + RTS51X_DEBUGP("Bad target number (%d:%d)\n", + chip->srb->device->id, + chip->srb->device->lun); + chip->srb->result = DID_BAD_TARGET << 16; + } + + else if (chip->srb->device->lun > chip->max_lun) { + RTS51X_DEBUGP("Bad LUN (%d:%d)\n", + chip->srb->device->id, + chip->srb->device->lun); + chip->srb->result = DID_BAD_TARGET << 16; + } + + /* we've got a command, let's do it! */ + else { + RTS51X_DEBUG(scsi_show_command(chip->srb)); + rts51x_invoke_transport(chip->srb, chip); + } + + /* lock access to the state */ + scsi_lock(host); + + /* indicate that the command is done */ + if (chip->srb->result != DID_ABORT << 16) + chip->srb->scsi_done(chip->srb); + else +SkipForAbort : + RTS51X_DEBUGP("scsi command aborted\n"); + + /* If an abort request was received we need to signal that + * the abort has finished. The proper test for this is + * the TIMED_OUT flag, not srb->result == DID_ABORT, because + * the timeout might have occurred after the command had + * already completed with a different result code. */ + if (test_bit(FLIDX_TIMED_OUT, &chip->usb->dflags)) { + complete(&(chip->usb->notify)); + + /* Allow USB transfers to resume */ + clear_bit(FLIDX_ABORTING, &chip->usb->dflags); + clear_bit(FLIDX_TIMED_OUT, &chip->usb->dflags); + } + + /* finished working on this command */ + chip->srb = NULL; + scsi_unlock(host); + + /* unlock the device pointers */ + mutex_unlock(&chip->usb->dev_mutex); + } /* for (;;) */ + + complete(&chip->usb->control_exit); + + /* Wait until we are told to stop */ +/* for (;;) { + set_current_state(TASK_INTERRUPTIBLE); + if (kthread_should_stop()) + break; + schedule(); + } + __set_current_state(TASK_RUNNING);*/ + return 0; +} + +static int rts51x_polling_thread(void *__chip) +{ + struct rts51x_chip *chip = (struct rts51x_chip *)__chip; + +#ifdef SCSI_SCAN_DELAY + /* Wait until SCSI scan finished */ + wait_timeout((delay_use + 5) * HZ); +#endif + + for (;;) { + wait_timeout(POLLING_INTERVAL); + + /* if the device has disconnected, we are free to exit */ + if (test_bit(FLIDX_DISCONNECTING, &chip->usb->dflags)) { + RTS51X_DEBUGP("-- exiting from rts51x-polling\n"); + break; + } + + /* if the device has disconnected, we are free to exit */ + /* if (kthread_should_stop()) { + printk(KERN_INFO "Stop polling thread!\n"); + break; + } */ + +#ifdef CONFIG_PM + if (RTS51X_CHK_STAT(chip, STAT_SS) || + RTS51X_CHK_STAT(chip, STAT_SS_PRE) || + RTS51X_CHK_STAT(chip, STAT_SUSPEND)) { + continue; + } + + if (ss_en) { + if (RTS51X_CHK_STAT(chip, STAT_IDLE)) { + if (chip->ss_counter < + (ss_delay * 1000 / POLLING_INTERVAL)) { + chip->ss_counter++; + } else { + /* Prepare SS state */ + RTS51X_SET_STAT(chip, STAT_SS_PRE); + rts51x_try_to_enter_ss(chip); + continue; + } + } else { + chip->ss_counter = 0; + } + } +#endif + + mspro_polling_format_status(chip); + + /* lock the device pointers */ + mutex_lock(&(chip->usb->dev_mutex)); + + rts51x_polling_func(chip); + + /* unlock the device pointers */ + mutex_unlock(&chip->usb->dev_mutex); + } /* for (;;) */ + + complete(&chip->usb->polling_exit); + + /* Wait until we are told to stop */ + /* for (;;) { + set_current_state(TASK_INTERRUPTIBLE); + if (kthread_should_stop()) + break; + schedule(); + } + __set_current_state(TASK_RUNNING); */ + return 0; +} + +#ifdef SCSI_SCAN_DELAY +/* Thread to carry out delayed SCSI-device scanning */ +static int rts51x_scan_thread(void *__chip) +{ + struct rts51x_chip *chip = (struct rts51x_chip *)__chip; + + printk(KERN_DEBUG + "rts51x: device found at %d\n", chip->usb->pusb_dev->devnum); + + set_freezable(); + /* Wait for the timeout to expire or for a disconnect */ + if (delay_use > 0) { + printk(KERN_DEBUG "rts51x: waiting for device " + "to settle before scanning\n"); + wait_event_freezable_timeout(chip->usb->delay_wait, + test_bit(FLIDX_DONT_SCAN, + &chip->usb->dflags), + delay_use * HZ); + } + + /* If the device is still connected, perform the scanning */ + if (!test_bit(FLIDX_DONT_SCAN, &chip->usb->dflags)) { + scsi_scan_host(rts51x_to_host(chip)); + printk(KERN_DEBUG "rts51x: device scan complete\n"); + + /* Should we unbind if no devices were detected? */ + } + + complete_and_exit(&chip->usb->scanning_done, 0); +} +#endif + +/* Associate our private data with the USB device */ +static int associate_dev(struct rts51x_chip *chip, struct usb_interface *intf) +{ + struct rts51x_usb *rts51x = chip->usb; +#ifdef SUPPORT_FILE_OP + int retval; +#endif + + /* Fill in the device-related fields */ + rts51x->pusb_dev = interface_to_usbdev(intf); + rts51x->pusb_intf = intf; + rts51x->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; + RTS51X_DEBUGP("Vendor: 0x%04x, Product: 0x%04x, Revision: 0x%04x\n", + le16_to_cpu(rts51x->pusb_dev->descriptor.idVendor), + le16_to_cpu(rts51x->pusb_dev->descriptor.idProduct), + le16_to_cpu(rts51x->pusb_dev->descriptor.bcdDevice)); + RTS51X_DEBUGP("Interface Subclass: 0x%02x, Protocol: 0x%02x\n", + intf->cur_altsetting->desc.bInterfaceSubClass, + intf->cur_altsetting->desc.bInterfaceProtocol); + + /* Store our private data in the interface */ + usb_set_intfdata(intf, chip); + +#ifdef SUPPORT_FILE_OP + /* we can register the device now, as it is ready */ + retval = usb_register_dev(intf, &rts51x_class); + if (retval) { + /* something prevented us from registering this driver */ + RTS51X_DEBUGP("Not able to get a minor for this device."); + usb_set_intfdata(intf, NULL); + return -ENOMEM; + } +#endif + + /* Allocate the device-related DMA-mapped buffers */ + rts51x->cr = usb_buffer_alloc(rts51x->pusb_dev, sizeof(*rts51x->cr), + GFP_KERNEL, &rts51x->cr_dma); + if (!rts51x->cr) { + RTS51X_DEBUGP("usb_ctrlrequest allocation failed\n"); + usb_set_intfdata(intf, NULL); + return -ENOMEM; + } + + rts51x->iobuf = usb_buffer_alloc(rts51x->pusb_dev, RTS51X_IOBUF_SIZE, + GFP_KERNEL, &rts51x->iobuf_dma); + if (!rts51x->iobuf) { + RTS51X_DEBUGP("I/O buffer allocation failed\n"); + usb_set_intfdata(intf, NULL); + return -ENOMEM; + } + return 0; +} + +static void rts51x_init_options(struct rts51x_chip *chip) +{ + struct rts51x_option *option = &(chip->option); + + option->led_blink_speed = 7; + option->mspro_formatter_enable = 1; + + option->fpga_sd_sdr104_clk = CLK_100; + option->fpga_sd_sdr50_clk = CLK_100; + option->fpga_sd_ddr50_clk = CLK_100; + option->fpga_sd_hs_clk = CLK_100; + option->fpga_mmc_52m_clk = CLK_80; + option->fpga_ms_hg_clk = CLK_80; + option->fpga_ms_4bit_clk = CLK_80; + + option->asic_sd_sdr104_clk = 98; + option->asic_sd_sdr50_clk = 98; + option->asic_sd_ddr50_clk = 98; + option->asic_sd_hs_clk = 97; + option->asic_mmc_52m_clk = 95; + option->asic_ms_hg_clk = 116; + option->asic_ms_4bit_clk = 77; + + option->sd_ddr_tx_phase = 0; + option->mmc_ddr_tx_phase = 1; + + option->sd_speed_prior = 0; + option->sd_ctl = + SD_PUSH_POINT_AUTO | SD_SAMPLE_POINT_AUTO | SUPPORT_UHS50_MMC44; + + option->ss_en = ss_en; + option->ss_delay = ss_delay; + option->needs_remote_wakeup = needs_remote_wakeup; + + option->auto_delink_en = auto_delink_en; + + option->FT2_fast_mode = 0; + option->pwr_delay = 800; + option->xd_rw_step = 0; + option->D3318_off_delay = 50; + option->delink_delay = 100; + option->rts5129_D3318_off_enable = 0; + option->sd20_pad_drive = 0; + option->reset_or_rw_fail_set_pad_drive = 1; + option->rcc_fail_flag = 0; + option->rcc_bug_fix_en = 1; + option->debounce_num = 2; + option->polling_time = 100; + option->led_toggle_interval = 6; + option->xd_rwn_step = 0; + option->sd_send_status_en = 0; + option->sdr50_tx_phase = 0x01; + option->sdr50_rx_phase = 0x05; + option->ddr50_tx_phase = 0x09; + option->ddr50_rx_phase = 0x06; + option->sdr50_phase_sel = 0; + option->sd30_pad_drive = 1; + option->ms_errreg_fix = 0; + option->reset_mmc_first = 0; + option->speed_mmc = 1; + option->led_always_on = 0; +} + +/* Get the pipe settings */ +static int get_pipes(struct rts51x_chip *chip) +{ + struct rts51x_usb *rts51x = chip->usb; + struct usb_host_interface *altsetting = + rts51x->pusb_intf->cur_altsetting; + int i; + struct usb_endpoint_descriptor *ep; + struct usb_endpoint_descriptor *ep_in = NULL; + struct usb_endpoint_descriptor *ep_out = NULL; + struct usb_endpoint_descriptor *ep_int = NULL; + + /* + * Find the first endpoint of each type we need. + * We are expecting a minimum of 2 endpoints - in and out (bulk). + * An optional interrupt-in is OK (necessary for CBI protocol). + * We will ignore any others. + */ + for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { + ep = &altsetting->endpoint[i].desc; + + if (usb_endpoint_xfer_bulk(ep)) { + if (usb_endpoint_dir_in(ep)) { + if (!ep_in) + ep_in = ep; + } else { + if (!ep_out) + ep_out = ep; + } + } + + else if (usb_endpoint_is_int_in(ep)) { + if (!ep_int) + ep_int = ep; + } + } + + if (!ep_in || !ep_out) { + RTS51X_DEBUGP("Endpoint sanity check failed!" + "Rejecting dev.\n"); + return -EIO; + } + + /* Calculate and store the pipe values */ + rts51x->send_ctrl_pipe = usb_sndctrlpipe(rts51x->pusb_dev, 0); + rts51x->recv_ctrl_pipe = usb_rcvctrlpipe(rts51x->pusb_dev, 0); + rts51x->send_bulk_pipe = usb_sndbulkpipe(rts51x->pusb_dev, + usb_endpoint_num(ep_out)); + rts51x->recv_bulk_pipe = usb_rcvbulkpipe(rts51x->pusb_dev, + usb_endpoint_num(ep_in)); + if (ep_int) { + rts51x->recv_intr_pipe = usb_rcvintpipe(rts51x->pusb_dev, + usb_endpoint_num + (ep_int)); + rts51x->ep_bInterval = ep_int->bInterval; + } + return 0; +} + +/* Initialize all the dynamic resources we need */ +static int rts51x_acquire_resources(struct rts51x_chip *chip) +{ + struct rts51x_usb *rts51x = chip->usb; + int retval; + + rts51x->current_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!rts51x->current_urb) { + RTS51X_DEBUGP("URB allocation failed\n"); + return -ENOMEM; + } + + rts51x->intr_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!rts51x->intr_urb) { + RTS51X_DEBUGP("URB allocation failed\n"); + return -ENOMEM; + } + + chip->cmd_buf = chip->rsp_buf = rts51x->iobuf; + + rts51x_init_options(chip); + + /* Init rts51xx device */ + retval = rts51x_init_chip(chip); + if (retval != STATUS_SUCCESS) + return -EIO; + + return 0; +} + +/* Release all our dynamic resources */ +static void rts51x_release_resources(struct rts51x_chip *chip) +{ + RTS51X_DEBUGP("-- %s\n", __func__); + + /* Tell the control thread to exit. The SCSI host must + * already have been removed and the DISCONNECTING flag set + * so that we won't accept any more commands. + */ + RTS51X_DEBUGP("-- sending exit command to thread\n"); + complete(&chip->usb->cmnd_ready); + if (chip->usb->ctl_thread) + wait_for_completion(&chip->usb->control_exit); + /* kthread_stop(chip->usb->ctl_thread); */ + if (chip->usb->polling_thread) + wait_for_completion(&chip->usb->polling_exit); + + /* if (chip->usb->polling_thread) + kthread_stop(chip->usb->polling_thread); */ + + wait_timeout(200); + + /* Release rts51xx device here */ + rts51x_release_chip(chip); + + usb_free_urb(chip->usb->current_urb); + usb_free_urb(chip->usb->intr_urb); +} + +/* Dissociate from the USB device */ +static void dissociate_dev(struct rts51x_chip *chip) +{ + struct rts51x_usb *rts51x = chip->usb; + + RTS51X_DEBUGP("-- %s\n", __func__); + + /* Free the device-related DMA-mapped buffers */ + if (rts51x->cr) + usb_buffer_free(rts51x->pusb_dev, sizeof(*rts51x->cr), + rts51x->cr, rts51x->cr_dma); + if (rts51x->iobuf) + usb_buffer_free(rts51x->pusb_dev, RTS51X_IOBUF_SIZE, + rts51x->iobuf, rts51x->iobuf_dma); + + /* Remove our private data from the interface */ + usb_set_intfdata(rts51x->pusb_intf, NULL); + +#ifdef SUPPORT_FILE_OP + /* give back our minor */ + usb_deregister_dev(rts51x->pusb_intf, &rts51x_class); +#endif + + kfree(rts51x); + chip->usb = NULL; +} + +/* First stage of disconnect processing: stop SCSI scanning, + * remove the host, and stop accepting new commands + */ +static void quiesce_and_remove_host(struct rts51x_chip *chip) +{ + struct rts51x_usb *rts51x = chip->usb; + struct Scsi_Host *host = rts51x_to_host(chip); + + /* If the device is really gone, cut short reset delays */ + if (rts51x->pusb_dev->state == USB_STATE_NOTATTACHED) + set_bit(FLIDX_DISCONNECTING, &rts51x->dflags); + +#ifdef SCSI_SCAN_DELAY + /* Prevent SCSI-scanning (if it hasn't started yet) + * and wait for the SCSI-scanning thread to stop. + */ + set_bit(FLIDX_DONT_SCAN, &rts51x->dflags); + wake_up(&rts51x->delay_wait); + wait_for_completion(&rts51x->scanning_done); +#endif + + /* Removing the host will perform an orderly shutdown: caches + * synchronized, disks spun down, etc. + */ + scsi_remove_host(host); + + /* Prevent any new commands from being accepted and cut short + * reset delays. + */ + scsi_lock(host); + set_bit(FLIDX_DISCONNECTING, &rts51x->dflags); + scsi_unlock(host); +#ifdef SCSI_SCAN_DELAY + wake_up(&rts51x->delay_wait); +#endif +} + +/* Second stage of disconnect processing: deallocate all resources */ +static void release_everything(struct rts51x_chip *chip) +{ + rts51x_release_resources(chip); + dissociate_dev(chip); + + /* Drop our reference to the host; the SCSI core will free it + * (and "chip" along with it) when the refcount becomes 0. */ + scsi_host_put(rts51x_to_host(chip)); +} + +static int rts51x_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct Scsi_Host *host; + struct rts51x_chip *chip; + struct rts51x_usb *rts51x; + int result; + struct task_struct *th; + + RTS51X_DEBUGP("%s detected\n", RTS51X_NAME); + + rts51x = kzalloc(sizeof(struct rts51x_usb), GFP_KERNEL); + if (!rts51x) { + printk(KERN_WARNING RTS51X_TIP + "Unable to allocate rts51x_usb\n"); + return -ENOMEM; + } + + /* + * Ask the SCSI layer to allocate a host structure, with extra + * space at the end for our private us_data structure. + */ + host = scsi_host_alloc(&rts51x_host_template, sizeof(*chip)); + if (!host) { + printk(KERN_WARNING RTS51X_TIP + "Unable to allocate the scsi host\n"); + kfree(rts51x); + return -ENOMEM; + } + + /* + * Allow 16-byte CDBs and thus > 2TB + */ + host->max_cmd_len = 16; + chip = host_to_rts51x(host); + memset(chip, 0, sizeof(struct rts51x_chip)); + + chip->vendor_id = id->idVendor; + chip->product_id = id->idProduct; + + mutex_init(&(rts51x->dev_mutex)); + init_completion(&rts51x->cmnd_ready); + init_completion(&rts51x->control_exit); + init_completion(&rts51x->polling_exit); + init_completion(&(rts51x->notify)); +#ifdef SCSI_SCAN_DELAY + init_waitqueue_head(&rts51x->delay_wait); + init_completion(&rts51x->scanning_done); +#endif + + chip->usb = rts51x; + + /* Associate the us_data structure with the USB device */ + result = associate_dev(chip, intf); + if (result) + goto BadDevice; + + /* Find the endpoints and calculate pipe values */ + result = get_pipes(chip); + if (result) + goto BadDevice; + + /* Acquire all the other resources and add the host */ + result = rts51x_acquire_resources(chip); + if (result) + goto BadDevice; + + /* Start up our control thread */ + th = kthread_run(rts51x_control_thread, chip, RTS51X_CTL_THREAD); + if (IS_ERR(th)) { + printk(KERN_WARNING RTS51X_TIP + "Unable to start control thread\n"); + result = PTR_ERR(th); + goto BadDevice; + } + rts51x->ctl_thread = th; + + result = scsi_add_host(rts51x_to_host(chip), &rts51x->pusb_intf->dev); + if (result) { + printk(KERN_WARNING RTS51X_TIP "Unable to add the scsi host\n"); + goto BadDevice; + } +#ifdef SCSI_SCAN_DELAY + /* Start up the thread for delayed SCSI-device scanning */ + th = kthread_create(rts51x_scan_thread, chip, RTS51X_SCAN_THREAD); + if (IS_ERR(th)) { + printk(KERN_WARNING RTS51X_TIP + "Unable to start the device-scanning thread\n"); + complete(&rts51x->scanning_done); + quiesce_and_remove_host(chip); + result = PTR_ERR(th); + goto BadDevice; + } + + wake_up_process(th); +#else + scsi_scan_host(rts51x_to_host(chip)); +#endif + + /* Start up our polling thread */ + th = kthread_run(rts51x_polling_thread, chip, RTS51X_POLLING_THREAD); + if (IS_ERR(th)) { + printk(KERN_WARNING RTS51X_TIP + "Unable to start polling thread\n"); + result = PTR_ERR(th); + goto BadDevice; + } + rts51x->polling_thread = th; + +#ifdef CONFIG_PM + if (ss_en) { + rts51x->pusb_intf->needs_remote_wakeup = needs_remote_wakeup; + SET_PM_USAGE_CNT(chip, 1); + RTS51X_DEBUGP("pm_usage_cnt = %d\n", GET_PM_USAGE_CNT(chip)); + } +#endif + + return 0; + + /* We come here if there are any problems */ +BadDevice: + RTS51X_DEBUGP("rts51x_probe() failed\n"); + release_everything(chip); + return result; +} + +static void rts51x_disconnect(struct usb_interface *intf) +{ + struct rts51x_chip *chip = (struct rts51x_chip *)usb_get_intfdata(intf); + + RTS51X_DEBUGP("rts51x_disconnect() called\n"); + quiesce_and_remove_host(chip); + release_everything(chip); +} + +/*********************************************************************** + * Initialization and registration + ***********************************************************************/ + +struct usb_device_id rts5139_usb_ids[] = { + {USB_DEVICE(0x0BDA, 0x0139)}, + {USB_DEVICE(0x0BDA, 0x0129)}, + {} /* Terminating entry */ +}; +EXPORT_SYMBOL_GPL(rts5139_usb_ids); + +MODULE_DEVICE_TABLE(usb, rts5139_usb_ids); + +struct usb_driver rts51x_driver = { + .name = RTS51X_NAME, + .probe = rts51x_probe, + .disconnect = rts51x_disconnect, + .suspend = rts51x_suspend, + .resume = rts51x_resume, + .reset_resume = rts51x_reset_resume, + .pre_reset = rts51x_pre_reset, + .post_reset = rts51x_post_reset, + .id_table = rts5139_usb_ids, + .soft_unbind = 1, +}; + +static int __init rts51x_init(void) +{ + int retval; + + printk(KERN_INFO "Initializing %s USB card reader driver...\n", + RTS51X_NAME); + + /* register the driver, return usb_register return code if error */ + retval = usb_register(&rts51x_driver); + if (retval == 0) { + printk(KERN_INFO + "Realtek %s USB card reader support registered.\n", + RTS51X_NAME); + } + return retval; +} + +static void __exit rts51x_exit(void) +{ + RTS51X_DEBUGP("rts51x_exit() called\n"); + + /* Deregister the driver + * This will cause disconnect() to be called for each + * attached unit + */ + RTS51X_DEBUGP("-- calling usb_deregister()\n"); + usb_deregister(&rts51x_driver); +} + +module_init(rts51x_init); +module_exit(rts51x_exit); |