| /* Driver for Realtek PCI-Express card reader |
| * |
| * Copyright(c) 2009-2013 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: |
| * Wei WANG (wei_wang@realsil.com.cn) |
| * Micky Ching (micky_ching@realsil.com.cn) |
| */ |
| |
| #include <linux/blkdev.h> |
| #include <linux/kthread.h> |
| #include <linux/sched.h> |
| #include <linux/workqueue.h> |
| |
| #include "rtsx.h" |
| #include "ms.h" |
| #include "sd.h" |
| #include "xd.h" |
| |
| MODULE_DESCRIPTION("Realtek PCI-Express card reader rts5208/rts5288 driver"); |
| MODULE_LICENSE("GPL"); |
| |
| static unsigned int delay_use = 1; |
| module_param(delay_use, uint, 0644); |
| MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); |
| |
| static int ss_en; |
| module_param(ss_en, int, 0644); |
| MODULE_PARM_DESC(ss_en, "enable selective suspend"); |
| |
| static int ss_interval = 50; |
| module_param(ss_interval, int, 0644); |
| MODULE_PARM_DESC(ss_interval, "Interval to enter ss state in seconds"); |
| |
| static int auto_delink_en; |
| module_param(auto_delink_en, int, 0644); |
| MODULE_PARM_DESC(auto_delink_en, "enable auto delink"); |
| |
| static unsigned char aspm_l0s_l1_en; |
| module_param(aspm_l0s_l1_en, byte, 0644); |
| MODULE_PARM_DESC(aspm_l0s_l1_en, "enable device aspm"); |
| |
| static int msi_en; |
| module_param(msi_en, int, 0644); |
| MODULE_PARM_DESC(msi_en, "enable msi"); |
| |
| static irqreturn_t rtsx_interrupt(int irq, void *dev_id); |
| |
| /*********************************************************************** |
| * Host functions |
| ***********************************************************************/ |
| |
| static const char *host_info(struct Scsi_Host *host) |
| { |
| return "SCSI emulation for PCI-Express Mass Storage devices"; |
| } |
| |
| static int slave_alloc(struct scsi_device *sdev) |
| { |
| /* |
| * Set the INQUIRY transfer length to 36. We don't use any of |
| * the extra data and many devices choke if asked for more or |
| * less than 36 bytes. |
| */ |
| sdev->inquiry_len = 36; |
| return 0; |
| } |
| |
| static int slave_configure(struct scsi_device *sdev) |
| { |
| /* |
| * Scatter-gather buffers (all but the last) must have a length |
| * divisible by the bulk maxpacket size. Otherwise a data packet |
| * would end up being short, causing a premature end to the data |
| * transfer. Since high-speed bulk pipes have a maxpacket size |
| * of 512, we'll use that as the scsi device queue's DMA alignment |
| * mask. Guaranteeing proper alignment of the first buffer will |
| * have the desired effect because, except at the beginning and |
| * the end, scatter-gather buffers follow page boundaries. |
| */ |
| blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
| |
| /* Set the SCSI level to at least 2. We'll leave it at 3 if that's |
| * what is originally reported. We need this to avoid confusing |
| * the SCSI layer with devices that report 0 or 1, but need 10-byte |
| * commands (ala ATAPI devices behind certain bridges, or devices |
| * which simply have broken INQUIRY data). |
| * |
| * NOTE: This means /dev/sg programs (ala cdrecord) will get the |
| * actual information. This seems to be the preference for |
| * programs like that. |
| * |
| * NOTE: This also means that /proc/scsi/scsi and sysfs may report |
| * the actual value or the modified one, depending on where the |
| * data comes from. |
| */ |
| if (sdev->scsi_level < SCSI_2) |
| sdev->scsi_level = sdev->sdev_target->scsi_level = SCSI_2; |
| |
| return 0; |
| } |
| |
| /*********************************************************************** |
| * /proc/scsi/ functions |
| ***********************************************************************/ |
| |
| /* we use this macro to help us write into the buffer */ |
| #undef SPRINTF |
| #define SPRINTF(args...) \ |
| do { if (pos < buffer+length) pos += sprintf(pos, ## args); } while (0) |
| |
| /* queue a command */ |
| /* This is always called with scsi_lock(host) held */ |
| static int queuecommand_lck(struct scsi_cmnd *srb, |
| void (*done)(struct scsi_cmnd *)) |
| { |
| struct rtsx_dev *dev = host_to_rtsx(srb->device->host); |
| struct rtsx_chip *chip = dev->chip; |
| |
| /* check for state-transition errors */ |
| if (chip->srb) { |
| dev_err(&dev->pci->dev, "Error: chip->srb = %p\n", |
| chip->srb); |
| return SCSI_MLQUEUE_HOST_BUSY; |
| } |
| |
| /* fail the command if we are disconnecting */ |
| if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) { |
| dev_info(&dev->pci->dev, "Fail command during disconnect\n"); |
| srb->result = DID_NO_CONNECT << 16; |
| done(srb); |
| return 0; |
| } |
| |
| /* enqueue the command and wake up the control thread */ |
| srb->scsi_done = done; |
| chip->srb = srb; |
| complete(&dev->cmnd_ready); |
| |
| return 0; |
| } |
| |
| static DEF_SCSI_QCMD(queuecommand) |
| |
| /*********************************************************************** |
| * Error handling functions |
| ***********************************************************************/ |
| |
| /* Command timeout and abort */ |
| static int command_abort(struct scsi_cmnd *srb) |
| { |
| struct Scsi_Host *host = srb->device->host; |
| struct rtsx_dev *dev = host_to_rtsx(host); |
| struct rtsx_chip *chip = dev->chip; |
| |
| dev_info(&dev->pci->dev, "%s called\n", __func__); |
| |
| scsi_lock(host); |
| |
| /* Is this command still active? */ |
| if (chip->srb != srb) { |
| scsi_unlock(host); |
| dev_info(&dev->pci->dev, "-- nothing to abort\n"); |
| return FAILED; |
| } |
| |
| rtsx_set_stat(chip, RTSX_STAT_ABORT); |
| |
| scsi_unlock(host); |
| |
| /* Wait for the aborted command to finish */ |
| wait_for_completion(&dev->notify); |
| |
| return SUCCESS; |
| } |
| |
| /* |
| * This invokes the transport reset mechanism to reset the state of the |
| * device |
| */ |
| static int device_reset(struct scsi_cmnd *srb) |
| { |
| int result = 0; |
| struct rtsx_dev *dev = host_to_rtsx(srb->device->host); |
| |
| dev_info(&dev->pci->dev, "%s called\n", __func__); |
| |
| return result < 0 ? FAILED : SUCCESS; |
| } |
| |
| /* Simulate a SCSI bus reset by resetting the device's USB port. */ |
| static int bus_reset(struct scsi_cmnd *srb) |
| { |
| int result = 0; |
| struct rtsx_dev *dev = host_to_rtsx(srb->device->host); |
| |
| dev_info(&dev->pci->dev, "%s called\n", __func__); |
| |
| return result < 0 ? FAILED : SUCCESS; |
| } |
| |
| /* |
| * this defines our host template, with which we'll allocate hosts |
| */ |
| |
| static struct scsi_host_template rtsx_host_template = { |
| /* basic userland interface stuff */ |
| .name = CR_DRIVER_NAME, |
| .proc_name = CR_DRIVER_NAME, |
| .info = host_info, |
| |
| /* command interface -- queued only */ |
| .queuecommand = queuecommand, |
| |
| /* error and abort handlers */ |
| .eh_abort_handler = command_abort, |
| .eh_device_reset_handler = device_reset, |
| .eh_bus_reset_handler = bus_reset, |
| |
| /* queue commands only, only one command per LUN */ |
| .can_queue = 1, |
| |
| /* unknown initiator id */ |
| .this_id = -1, |
| |
| .slave_alloc = slave_alloc, |
| .slave_configure = slave_configure, |
| |
| /* lots of sg segments can be handled */ |
| .sg_tablesize = SG_ALL, |
| |
| /* limit the total size of a transfer to 120 KB */ |
| .max_sectors = 240, |
| |
| /* merge commands... this seems to help performance, but |
| * periodically someone should test to see which setting is more |
| * optimal. |
| */ |
| .use_clustering = 1, |
| |
| /* emulated HBA */ |
| .emulated = 1, |
| |
| /* we do our own delay after a device or bus reset */ |
| .skip_settle_delay = 1, |
| |
| /* module management */ |
| .module = THIS_MODULE |
| }; |
| |
| static int rtsx_acquire_irq(struct rtsx_dev *dev) |
| { |
| struct rtsx_chip *chip = dev->chip; |
| |
| dev_info(&dev->pci->dev, "%s: chip->msi_en = %d, pci->irq = %d\n", |
| __func__, chip->msi_en, dev->pci->irq); |
| |
| if (request_irq(dev->pci->irq, rtsx_interrupt, |
| chip->msi_en ? 0 : IRQF_SHARED, |
| CR_DRIVER_NAME, dev)) { |
| dev_err(&dev->pci->dev, |
| "rtsx: unable to grab IRQ %d, disabling device\n", |
| dev->pci->irq); |
| return -1; |
| } |
| |
| dev->irq = dev->pci->irq; |
| pci_intx(dev->pci, !chip->msi_en); |
| |
| return 0; |
| } |
| |
| int rtsx_read_pci_cfg_byte(u8 bus, u8 dev, u8 func, u8 offset, u8 *val) |
| { |
| struct pci_dev *pdev; |
| u8 data; |
| u8 devfn = (dev << 3) | func; |
| |
| pdev = pci_get_bus_and_slot(bus, devfn); |
| if (!pdev) |
| return -1; |
| |
| pci_read_config_byte(pdev, offset, &data); |
| if (val) |
| *val = data; |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| /* |
| * power management |
| */ |
| static int rtsx_suspend(struct pci_dev *pci, pm_message_t state) |
| { |
| struct rtsx_dev *dev = pci_get_drvdata(pci); |
| struct rtsx_chip *chip; |
| |
| if (!dev) |
| return 0; |
| |
| /* lock the device pointers */ |
| mutex_lock(&(dev->dev_mutex)); |
| |
| chip = dev->chip; |
| |
| rtsx_do_before_power_down(chip, PM_S3); |
| |
| if (dev->irq >= 0) { |
| free_irq(dev->irq, (void *)dev); |
| dev->irq = -1; |
| } |
| |
| if (chip->msi_en) |
| pci_disable_msi(pci); |
| |
| pci_save_state(pci); |
| pci_enable_wake(pci, pci_choose_state(pci, state), 1); |
| pci_disable_device(pci); |
| pci_set_power_state(pci, pci_choose_state(pci, state)); |
| |
| /* unlock the device pointers */ |
| mutex_unlock(&dev->dev_mutex); |
| |
| return 0; |
| } |
| |
| static int rtsx_resume(struct pci_dev *pci) |
| { |
| struct rtsx_dev *dev = pci_get_drvdata(pci); |
| struct rtsx_chip *chip; |
| |
| if (!dev) |
| return 0; |
| |
| chip = dev->chip; |
| |
| /* lock the device pointers */ |
| mutex_lock(&(dev->dev_mutex)); |
| |
| pci_set_power_state(pci, PCI_D0); |
| pci_restore_state(pci); |
| if (pci_enable_device(pci) < 0) { |
| dev_err(&dev->pci->dev, |
| "%s: pci_enable_device failed, disabling device\n", |
| CR_DRIVER_NAME); |
| /* unlock the device pointers */ |
| mutex_unlock(&dev->dev_mutex); |
| return -EIO; |
| } |
| pci_set_master(pci); |
| |
| if (chip->msi_en) { |
| if (pci_enable_msi(pci) < 0) |
| chip->msi_en = 0; |
| } |
| |
| if (rtsx_acquire_irq(dev) < 0) { |
| /* unlock the device pointers */ |
| mutex_unlock(&dev->dev_mutex); |
| return -EIO; |
| } |
| |
| rtsx_write_register(chip, HOST_SLEEP_STATE, 0x03, 0x00); |
| rtsx_init_chip(chip); |
| |
| /* unlock the device pointers */ |
| mutex_unlock(&dev->dev_mutex); |
| |
| return 0; |
| } |
| #endif /* CONFIG_PM */ |
| |
| static void rtsx_shutdown(struct pci_dev *pci) |
| { |
| struct rtsx_dev *dev = pci_get_drvdata(pci); |
| struct rtsx_chip *chip; |
| |
| if (!dev) |
| return; |
| |
| chip = dev->chip; |
| |
| rtsx_do_before_power_down(chip, PM_S1); |
| |
| if (dev->irq >= 0) { |
| free_irq(dev->irq, (void *)dev); |
| dev->irq = -1; |
| } |
| |
| if (chip->msi_en) |
| pci_disable_msi(pci); |
| |
| pci_disable_device(pci); |
| } |
| |
| static int rtsx_control_thread(void *__dev) |
| { |
| struct rtsx_dev *dev = __dev; |
| struct rtsx_chip *chip = dev->chip; |
| struct Scsi_Host *host = rtsx_to_host(dev); |
| |
| for (;;) { |
| if (wait_for_completion_interruptible(&dev->cmnd_ready)) |
| break; |
| |
| /* lock the device pointers */ |
| mutex_lock(&(dev->dev_mutex)); |
| |
| /* if the device has disconnected, we are free to exit */ |
| if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) { |
| dev_info(&dev->pci->dev, "-- rtsx-control exiting\n"); |
| mutex_unlock(&dev->dev_mutex); |
| break; |
| } |
| |
| /* lock access to the state */ |
| scsi_lock(host); |
| |
| /* has the command aborted ? */ |
| if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) { |
| 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) { |
| dev_err(&dev->pci->dev, "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) { |
| dev_err(&dev->pci->dev, "Bad target number (%d:%d)\n", |
| chip->srb->device->id, |
| (u8)chip->srb->device->lun); |
| chip->srb->result = DID_BAD_TARGET << 16; |
| } |
| |
| else if (chip->srb->device->lun > chip->max_lun) { |
| dev_err(&dev->pci->dev, "Bad LUN (%d:%d)\n", |
| chip->srb->device->id, |
| (u8)chip->srb->device->lun); |
| chip->srb->result = DID_BAD_TARGET << 16; |
| } |
| |
| /* we've got a command, let's do it! */ |
| else { |
| scsi_show_command(chip); |
| rtsx_invoke_transport(chip->srb, chip); |
| } |
| |
| /* lock access to the state */ |
| scsi_lock(host); |
| |
| /* did the command already complete because of a disconnect? */ |
| if (!chip->srb) |
| ; /* nothing to do */ |
| |
| /* indicate that the command is done */ |
| else if (chip->srb->result != DID_ABORT << 16) { |
| chip->srb->scsi_done(chip->srb); |
| } else { |
| SkipForAbort: |
| dev_err(&dev->pci->dev, "scsi command aborted\n"); |
| } |
| |
| if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) { |
| complete(&(dev->notify)); |
| |
| rtsx_set_stat(chip, RTSX_STAT_IDLE); |
| } |
| |
| /* finished working on this command */ |
| chip->srb = NULL; |
| scsi_unlock(host); |
| |
| /* unlock the device pointers */ |
| mutex_unlock(&dev->dev_mutex); |
| } /* for (;;) */ |
| |
| /* notify the exit routine that we're actually exiting now |
| * |
| * complete()/wait_for_completion() is similar to up()/down(), |
| * except that complete() is safe in the case where the structure |
| * is getting deleted in a parallel mode of execution (i.e. just |
| * after the down() -- that's necessary for the thread-shutdown |
| * case. |
| * |
| * complete_and_exit() goes even further than this -- it is safe in |
| * the case that the thread of the caller is going away (not just |
| * the structure) -- this is necessary for the module-remove case. |
| * This is important in preemption kernels, which transfer the flow |
| * of execution immediately upon a complete(). |
| */ |
| complete_and_exit(&dev->control_exit, 0); |
| } |
| |
| static int rtsx_polling_thread(void *__dev) |
| { |
| struct rtsx_dev *dev = __dev; |
| struct rtsx_chip *chip = dev->chip; |
| struct sd_info *sd_card = &(chip->sd_card); |
| struct xd_info *xd_card = &(chip->xd_card); |
| struct ms_info *ms_card = &(chip->ms_card); |
| |
| sd_card->cleanup_counter = 0; |
| xd_card->cleanup_counter = 0; |
| ms_card->cleanup_counter = 0; |
| |
| /* Wait until SCSI scan finished */ |
| wait_timeout((delay_use + 5) * 1000); |
| |
| for (;;) { |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| schedule_timeout(msecs_to_jiffies(POLLING_INTERVAL)); |
| |
| /* lock the device pointers */ |
| mutex_lock(&(dev->dev_mutex)); |
| |
| /* if the device has disconnected, we are free to exit */ |
| if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) { |
| dev_info(&dev->pci->dev, "-- rtsx-polling exiting\n"); |
| mutex_unlock(&dev->dev_mutex); |
| break; |
| } |
| |
| mutex_unlock(&dev->dev_mutex); |
| |
| mspro_polling_format_status(chip); |
| |
| /* lock the device pointers */ |
| mutex_lock(&(dev->dev_mutex)); |
| |
| rtsx_polling_func(chip); |
| |
| /* unlock the device pointers */ |
| mutex_unlock(&dev->dev_mutex); |
| } |
| |
| complete_and_exit(&dev->polling_exit, 0); |
| } |
| |
| /* |
| * interrupt handler |
| */ |
| static irqreturn_t rtsx_interrupt(int irq, void *dev_id) |
| { |
| struct rtsx_dev *dev = dev_id; |
| struct rtsx_chip *chip; |
| int retval; |
| u32 status; |
| |
| if (dev) |
| chip = dev->chip; |
| else |
| return IRQ_NONE; |
| |
| if (!chip) |
| return IRQ_NONE; |
| |
| spin_lock(&dev->reg_lock); |
| |
| retval = rtsx_pre_handle_interrupt(chip); |
| if (retval == STATUS_FAIL) { |
| spin_unlock(&dev->reg_lock); |
| if (chip->int_reg == 0xFFFFFFFF) |
| return IRQ_HANDLED; |
| return IRQ_NONE; |
| } |
| |
| status = chip->int_reg; |
| |
| if (dev->check_card_cd) { |
| if (!(dev->check_card_cd & status)) { |
| /* card not exist, return TRANS_RESULT_FAIL */ |
| dev->trans_result = TRANS_RESULT_FAIL; |
| if (dev->done) |
| complete(dev->done); |
| goto Exit; |
| } |
| } |
| |
| if (status & (NEED_COMPLETE_INT | DELINK_INT)) { |
| if (status & (TRANS_FAIL_INT | DELINK_INT)) { |
| if (status & DELINK_INT) |
| RTSX_SET_DELINK(chip); |
| dev->trans_result = TRANS_RESULT_FAIL; |
| if (dev->done) |
| complete(dev->done); |
| } else if (status & TRANS_OK_INT) { |
| dev->trans_result = TRANS_RESULT_OK; |
| if (dev->done) |
| complete(dev->done); |
| } else if (status & DATA_DONE_INT) { |
| dev->trans_result = TRANS_NOT_READY; |
| if (dev->done && (dev->trans_state == STATE_TRANS_SG)) |
| complete(dev->done); |
| } |
| } |
| |
| Exit: |
| spin_unlock(&dev->reg_lock); |
| return IRQ_HANDLED; |
| } |
| |
| /* Release all our dynamic resources */ |
| static void rtsx_release_resources(struct rtsx_dev *dev) |
| { |
| dev_info(&dev->pci->dev, "-- %s\n", __func__); |
| |
| /* Tell the control thread to exit. The SCSI host must |
| * already have been removed so it won't try to queue |
| * any more commands. |
| */ |
| dev_info(&dev->pci->dev, "-- sending exit command to thread\n"); |
| complete(&dev->cmnd_ready); |
| if (dev->ctl_thread) |
| wait_for_completion(&dev->control_exit); |
| if (dev->polling_thread) |
| wait_for_completion(&dev->polling_exit); |
| |
| wait_timeout(200); |
| |
| if (dev->rtsx_resv_buf) { |
| dev->chip->host_cmds_ptr = NULL; |
| dev->chip->host_sg_tbl_ptr = NULL; |
| } |
| |
| if (dev->irq > 0) |
| free_irq(dev->irq, (void *)dev); |
| if (dev->chip->msi_en) |
| pci_disable_msi(dev->pci); |
| if (dev->remap_addr) |
| iounmap(dev->remap_addr); |
| |
| rtsx_release_chip(dev->chip); |
| kfree(dev->chip); |
| } |
| |
| /* |
| * First stage of disconnect processing: stop all commands and remove |
| * the host |
| */ |
| static void quiesce_and_remove_host(struct rtsx_dev *dev) |
| { |
| struct Scsi_Host *host = rtsx_to_host(dev); |
| struct rtsx_chip *chip = dev->chip; |
| |
| /* |
| * Prevent new transfers, stop the current command, and |
| * interrupt a SCSI-scan or device-reset delay |
| */ |
| mutex_lock(&dev->dev_mutex); |
| scsi_lock(host); |
| rtsx_set_stat(chip, RTSX_STAT_DISCONNECT); |
| scsi_unlock(host); |
| mutex_unlock(&dev->dev_mutex); |
| wake_up(&dev->delay_wait); |
| wait_for_completion(&dev->scanning_done); |
| |
| /* Wait some time to let other threads exist */ |
| wait_timeout(100); |
| |
| /* |
| * queuecommand won't accept any new commands and the control |
| * thread won't execute a previously-queued command. If there |
| * is such a command pending, complete it with an error. |
| */ |
| mutex_lock(&dev->dev_mutex); |
| if (chip->srb) { |
| chip->srb->result = DID_NO_CONNECT << 16; |
| scsi_lock(host); |
| chip->srb->scsi_done(dev->chip->srb); |
| chip->srb = NULL; |
| scsi_unlock(host); |
| } |
| mutex_unlock(&dev->dev_mutex); |
| |
| /* Now we own no commands so it's safe to remove the SCSI host */ |
| scsi_remove_host(host); |
| } |
| |
| /* Second stage of disconnect processing: deallocate all resources */ |
| static void release_everything(struct rtsx_dev *dev) |
| { |
| rtsx_release_resources(dev); |
| |
| /* |
| * Drop our reference to the host; the SCSI core will free it |
| * when the refcount becomes 0. |
| */ |
| scsi_host_put(rtsx_to_host(dev)); |
| } |
| |
| /* Thread to carry out delayed SCSI-device scanning */ |
| static int rtsx_scan_thread(void *__dev) |
| { |
| struct rtsx_dev *dev = __dev; |
| struct rtsx_chip *chip = dev->chip; |
| |
| /* Wait for the timeout to expire or for a disconnect */ |
| if (delay_use > 0) { |
| dev_info(&dev->pci->dev, |
| "%s: waiting for device to settle before scanning\n", |
| CR_DRIVER_NAME); |
| wait_event_interruptible_timeout(dev->delay_wait, |
| rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT), |
| delay_use * HZ); |
| } |
| |
| /* If the device is still connected, perform the scanning */ |
| if (!rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) { |
| scsi_scan_host(rtsx_to_host(dev)); |
| dev_info(&dev->pci->dev, "%s: device scan complete\n", |
| CR_DRIVER_NAME); |
| |
| /* Should we unbind if no devices were detected? */ |
| } |
| |
| complete_and_exit(&dev->scanning_done, 0); |
| } |
| |
| static void rtsx_init_options(struct rtsx_chip *chip) |
| { |
| chip->vendor_id = chip->rtsx->pci->vendor; |
| chip->product_id = chip->rtsx->pci->device; |
| chip->adma_mode = 1; |
| chip->lun_mc = 0; |
| chip->driver_first_load = 1; |
| #ifdef HW_AUTO_SWITCH_SD_BUS |
| chip->sdio_in_charge = 0; |
| #endif |
| |
| chip->mspro_formatter_enable = 1; |
| chip->ignore_sd = 0; |
| chip->use_hw_setting = 0; |
| chip->lun_mode = DEFAULT_SINGLE; |
| chip->auto_delink_en = auto_delink_en; |
| chip->ss_en = ss_en; |
| chip->ss_idle_period = ss_interval * 1000; |
| chip->remote_wakeup_en = 0; |
| chip->aspm_l0s_l1_en = aspm_l0s_l1_en; |
| chip->dynamic_aspm = 1; |
| chip->fpga_sd_sdr104_clk = CLK_200; |
| chip->fpga_sd_ddr50_clk = CLK_100; |
| chip->fpga_sd_sdr50_clk = CLK_100; |
| chip->fpga_sd_hs_clk = CLK_100; |
| chip->fpga_mmc_52m_clk = CLK_80; |
| chip->fpga_ms_hg_clk = CLK_80; |
| chip->fpga_ms_4bit_clk = CLK_80; |
| chip->fpga_ms_1bit_clk = CLK_40; |
| chip->asic_sd_sdr104_clk = 203; |
| chip->asic_sd_sdr50_clk = 98; |
| chip->asic_sd_ddr50_clk = 98; |
| chip->asic_sd_hs_clk = 98; |
| chip->asic_mmc_52m_clk = 98; |
| chip->asic_ms_hg_clk = 117; |
| chip->asic_ms_4bit_clk = 78; |
| chip->asic_ms_1bit_clk = 39; |
| chip->ssc_depth_sd_sdr104 = SSC_DEPTH_2M; |
| chip->ssc_depth_sd_sdr50 = SSC_DEPTH_2M; |
| chip->ssc_depth_sd_ddr50 = SSC_DEPTH_1M; |
| chip->ssc_depth_sd_hs = SSC_DEPTH_1M; |
| chip->ssc_depth_mmc_52m = SSC_DEPTH_1M; |
| chip->ssc_depth_ms_hg = SSC_DEPTH_1M; |
| chip->ssc_depth_ms_4bit = SSC_DEPTH_512K; |
| chip->ssc_depth_low_speed = SSC_DEPTH_512K; |
| chip->ssc_en = 1; |
| chip->sd_speed_prior = 0x01040203; |
| chip->sd_current_prior = 0x00010203; |
| chip->sd_ctl = SD_PUSH_POINT_AUTO | |
| SD_SAMPLE_POINT_AUTO | |
| SUPPORT_MMC_DDR_MODE; |
| chip->sd_ddr_tx_phase = 0; |
| chip->mmc_ddr_tx_phase = 1; |
| chip->sd_default_tx_phase = 15; |
| chip->sd_default_rx_phase = 15; |
| chip->pmos_pwr_on_interval = 200; |
| chip->sd_voltage_switch_delay = 1000; |
| chip->ms_power_class_en = 3; |
| |
| chip->sd_400mA_ocp_thd = 1; |
| chip->sd_800mA_ocp_thd = 5; |
| chip->ms_ocp_thd = 2; |
| |
| chip->card_drive_sel = 0x55; |
| chip->sd30_drive_sel_1v8 = 0x03; |
| chip->sd30_drive_sel_3v3 = 0x01; |
| |
| chip->do_delink_before_power_down = 1; |
| chip->auto_power_down = 1; |
| chip->polling_config = 0; |
| |
| chip->force_clkreq_0 = 1; |
| chip->ft2_fast_mode = 0; |
| |
| chip->sdio_retry_cnt = 1; |
| |
| chip->xd_timeout = 2000; |
| chip->sd_timeout = 10000; |
| chip->ms_timeout = 2000; |
| chip->mspro_timeout = 15000; |
| |
| chip->power_down_in_ss = 1; |
| |
| chip->sdr104_en = 1; |
| chip->sdr50_en = 1; |
| chip->ddr50_en = 1; |
| |
| chip->delink_stage1_step = 100; |
| chip->delink_stage2_step = 40; |
| chip->delink_stage3_step = 20; |
| |
| chip->auto_delink_in_L1 = 1; |
| chip->blink_led = 1; |
| chip->msi_en = msi_en; |
| chip->hp_watch_bios_hotplug = 0; |
| chip->max_payload = 0; |
| chip->phy_voltage = 0; |
| |
| chip->support_ms_8bit = 1; |
| chip->s3_pwr_off_delay = 1000; |
| } |
| |
| static int rtsx_probe(struct pci_dev *pci, |
| const struct pci_device_id *pci_id) |
| { |
| struct Scsi_Host *host; |
| struct rtsx_dev *dev; |
| int err = 0; |
| struct task_struct *th; |
| |
| dev_dbg(&pci->dev, "Realtek PCI-E card reader detected\n"); |
| |
| err = pcim_enable_device(pci); |
| if (err < 0) { |
| dev_err(&pci->dev, "PCI enable device failed!\n"); |
| return err; |
| } |
| |
| err = pci_request_regions(pci, CR_DRIVER_NAME); |
| if (err < 0) { |
| dev_err(&pci->dev, "PCI request regions for %s failed!\n", |
| CR_DRIVER_NAME); |
| return err; |
| } |
| |
| /* |
| * Ask the SCSI layer to allocate a host structure, with extra |
| * space at the end for our private rtsx_dev structure. |
| */ |
| host = scsi_host_alloc(&rtsx_host_template, sizeof(*dev)); |
| if (!host) { |
| dev_err(&pci->dev, "Unable to allocate the scsi host\n"); |
| return -ENOMEM; |
| } |
| |
| dev = host_to_rtsx(host); |
| memset(dev, 0, sizeof(struct rtsx_dev)); |
| |
| dev->chip = kzalloc(sizeof(struct rtsx_chip), GFP_KERNEL); |
| if (!dev->chip) { |
| err = -ENOMEM; |
| goto errout; |
| } |
| |
| spin_lock_init(&dev->reg_lock); |
| mutex_init(&(dev->dev_mutex)); |
| init_completion(&dev->cmnd_ready); |
| init_completion(&dev->control_exit); |
| init_completion(&dev->polling_exit); |
| init_completion(&(dev->notify)); |
| init_completion(&dev->scanning_done); |
| init_waitqueue_head(&dev->delay_wait); |
| |
| dev->pci = pci; |
| dev->irq = -1; |
| |
| dev_info(&pci->dev, "Resource length: 0x%x\n", |
| (unsigned int)pci_resource_len(pci, 0)); |
| dev->addr = pci_resource_start(pci, 0); |
| dev->remap_addr = ioremap_nocache(dev->addr, pci_resource_len(pci, 0)); |
| if (!dev->remap_addr) { |
| dev_err(&pci->dev, "ioremap error\n"); |
| err = -ENXIO; |
| goto errout; |
| } |
| |
| /* |
| * Using "unsigned long" cast here to eliminate gcc warning in |
| * 64-bit system |
| */ |
| dev_info(&pci->dev, "Original address: 0x%lx, remapped address: 0x%lx\n", |
| (unsigned long)(dev->addr), (unsigned long)(dev->remap_addr)); |
| |
| dev->rtsx_resv_buf = dmam_alloc_coherent(&pci->dev, RTSX_RESV_BUF_LEN, |
| &dev->rtsx_resv_buf_addr, GFP_KERNEL); |
| if (!dev->rtsx_resv_buf) { |
| dev_err(&pci->dev, "alloc dma buffer fail\n"); |
| err = -ENXIO; |
| goto errout; |
| } |
| dev->chip->host_cmds_ptr = dev->rtsx_resv_buf; |
| dev->chip->host_cmds_addr = dev->rtsx_resv_buf_addr; |
| dev->chip->host_sg_tbl_ptr = dev->rtsx_resv_buf + HOST_CMDS_BUF_LEN; |
| dev->chip->host_sg_tbl_addr = dev->rtsx_resv_buf_addr + |
| HOST_CMDS_BUF_LEN; |
| |
| dev->chip->rtsx = dev; |
| |
| rtsx_init_options(dev->chip); |
| |
| dev_info(&pci->dev, "pci->irq = %d\n", pci->irq); |
| |
| if (dev->chip->msi_en) { |
| if (pci_enable_msi(pci) < 0) |
| dev->chip->msi_en = 0; |
| } |
| |
| if (rtsx_acquire_irq(dev) < 0) { |
| err = -EBUSY; |
| goto errout; |
| } |
| |
| pci_set_master(pci); |
| synchronize_irq(dev->irq); |
| |
| rtsx_init_chip(dev->chip); |
| |
| /* |
| * set the supported max_lun and max_id for the scsi host |
| * NOTE: the minimal value of max_id is 1 |
| */ |
| host->max_id = 1; |
| host->max_lun = dev->chip->max_lun; |
| |
| /* Start up our control thread */ |
| th = kthread_run(rtsx_control_thread, dev, CR_DRIVER_NAME); |
| if (IS_ERR(th)) { |
| dev_err(&pci->dev, "Unable to start control thread\n"); |
| err = PTR_ERR(th); |
| goto errout; |
| } |
| dev->ctl_thread = th; |
| |
| err = scsi_add_host(host, &pci->dev); |
| if (err) { |
| dev_err(&pci->dev, "Unable to add the scsi host\n"); |
| goto errout; |
| } |
| |
| /* Start up the thread for delayed SCSI-device scanning */ |
| th = kthread_run(rtsx_scan_thread, dev, "rtsx-scan"); |
| if (IS_ERR(th)) { |
| dev_err(&pci->dev, "Unable to start the device-scanning thread\n"); |
| complete(&dev->scanning_done); |
| quiesce_and_remove_host(dev); |
| err = PTR_ERR(th); |
| goto errout; |
| } |
| |
| /* Start up the thread for polling thread */ |
| th = kthread_run(rtsx_polling_thread, dev, "rtsx-polling"); |
| if (IS_ERR(th)) { |
| dev_err(&pci->dev, "Unable to start the device-polling thread\n"); |
| quiesce_and_remove_host(dev); |
| err = PTR_ERR(th); |
| goto errout; |
| } |
| dev->polling_thread = th; |
| |
| pci_set_drvdata(pci, dev); |
| |
| return 0; |
| |
| /* We come here if there are any problems */ |
| errout: |
| dev_err(&pci->dev, "rtsx_probe() failed\n"); |
| release_everything(dev); |
| |
| return err; |
| } |
| |
| static void rtsx_remove(struct pci_dev *pci) |
| { |
| struct rtsx_dev *dev = pci_get_drvdata(pci); |
| |
| dev_info(&pci->dev, "rtsx_remove() called\n"); |
| |
| quiesce_and_remove_host(dev); |
| release_everything(dev); |
| } |
| |
| /* PCI IDs */ |
| static const struct pci_device_id rtsx_ids[] = { |
| { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x5208), |
| PCI_CLASS_OTHERS << 16, 0xFF0000 }, |
| { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x5288), |
| PCI_CLASS_OTHERS << 16, 0xFF0000 }, |
| { 0, }, |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, rtsx_ids); |
| |
| /* pci_driver definition */ |
| static struct pci_driver rtsx_driver = { |
| .name = CR_DRIVER_NAME, |
| .id_table = rtsx_ids, |
| .probe = rtsx_probe, |
| .remove = rtsx_remove, |
| #ifdef CONFIG_PM |
| .suspend = rtsx_suspend, |
| .resume = rtsx_resume, |
| #endif |
| .shutdown = rtsx_shutdown, |
| }; |
| |
| module_pci_driver(rtsx_driver); |