diff options
Diffstat (limited to 'drivers/staging/rts5208/rtsx.c')
| -rw-r--r-- | drivers/staging/rts5208/rtsx.c | 993 |
1 files changed, 993 insertions, 0 deletions
diff --git a/drivers/staging/rts5208/rtsx.c b/drivers/staging/rts5208/rtsx.c new file mode 100644 index 000000000..2284a96ab --- /dev/null +++ b/drivers/staging/rts5208/rtsx.c @@ -0,0 +1,993 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Realtek PCI-Express card reader + * + * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. + * + * 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 = SCSI_2; + 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 *) = scsi_done; + 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 */ + 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; + + 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) +{ + return 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, + + /* 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, + + /* 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; +} + +/* + * power management + */ +static int __maybe_unused rtsx_suspend(struct device *dev_d) +{ + struct pci_dev *pci = to_pci_dev(dev_d); + 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_free_irq_vectors(pci); + + device_wakeup_enable(dev_d); + + /* unlock the device pointers */ + mutex_unlock(&dev->dev_mutex); + + return 0; +} + +static int __maybe_unused rtsx_resume(struct device *dev_d) +{ + struct pci_dev *pci = to_pci_dev(dev_d); + 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_master(pci); + + if (chip->msi_en) { + if (pci_alloc_irq_vectors(pci, 1, 1, PCI_IRQ_MSI) < 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; +} + +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_free_irq_vectors(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 skip_for_abort; + } + + 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) { + scsi_done(chip->srb); + } else { +skip_for_abort: + 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. + * + * kthread_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(). + */ + kthread_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); + } + + kthread_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_free_irq_vectors(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); + 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? */ + } + + kthread_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"); + err = -ENOMEM; + goto scsi_host_alloc_fail; + } + + dev = host_to_rtsx(host); + memset(dev, 0, sizeof(struct rtsx_dev)); + + dev->chip = kzalloc(sizeof(*dev->chip), GFP_KERNEL); + if (!dev->chip) { + err = -ENOMEM; + goto chip_alloc_fail; + } + + 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(dev->addr, pci_resource_len(pci, 0)); + if (!dev->remap_addr) { + dev_err(&pci->dev, "ioremap error\n"); + err = -ENXIO; + goto ioremap_fail; + } + + /* + * 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 dma_alloc_fail; + } + 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_alloc_irq_vectors(pci, 1, 1, PCI_IRQ_MSI) < 0) + dev->chip->msi_en = 0; + } + + if (rtsx_acquire_irq(dev) < 0) { + err = -EBUSY; + goto irq_acquire_fail; + } + + 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 control_thread_fail; + } + 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 scsi_add_host_fail; + } + + /* 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); + err = PTR_ERR(th); + goto scan_thread_fail; + } + + /* 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"); + err = PTR_ERR(th); + goto scan_thread_fail; + } + dev->polling_thread = th; + + pci_set_drvdata(pci, dev); + + return 0; + + /* We come here if there are any problems */ +scan_thread_fail: + quiesce_and_remove_host(dev); +scsi_add_host_fail: + complete(&dev->cmnd_ready); + wait_for_completion(&dev->control_exit); +control_thread_fail: + free_irq(dev->irq, (void *)dev); + rtsx_release_chip(dev->chip); +irq_acquire_fail: + dev->chip->host_cmds_ptr = NULL; + dev->chip->host_sg_tbl_ptr = NULL; + if (dev->chip->msi_en) + pci_free_irq_vectors(dev->pci); +dma_alloc_fail: + iounmap(dev->remap_addr); +ioremap_fail: + kfree(dev->chip); +chip_alloc_fail: + dev_err(&pci->dev, "%s failed\n", __func__); + scsi_host_put(host); +scsi_host_alloc_fail: + pci_release_regions(pci); + return err; +} + +static void rtsx_remove(struct pci_dev *pci) +{ + struct rtsx_dev *dev = pci_get_drvdata(pci); + + quiesce_and_remove_host(dev); + release_everything(dev); + pci_release_regions(pci); +} + +/* 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); + +static SIMPLE_DEV_PM_OPS(rtsx_pm_ops, rtsx_suspend, rtsx_resume); + +/* pci_driver definition */ +static struct pci_driver rtsx_driver = { + .name = CR_DRIVER_NAME, + .id_table = rtsx_ids, + .probe = rtsx_probe, + .remove = rtsx_remove, + .driver.pm = &rtsx_pm_ops, + .shutdown = rtsx_shutdown, +}; + +module_pci_driver(rtsx_driver); |