Merge tag 'staging-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging / IIO driver updates from Greg KH:
 "Here is the big staging and iio driver update for 5.2-rc1.

  Lots of tiny fixes all over the staging and IIO driver trees here,
  along with some new IIO drivers.

  The "counter" subsystem was added in here as well, as it is needed by
  the IIO drivers and subsystem.

  Also we ended up deleting two drivers, making this pull request remove
  a few hundred thousand lines of code, always a nice thing to see. Both
  of the drivers removed have been replaced with "real" drivers in their
  various subsystem directories, and they will be coming to you from
  those locations during this merge window.

  There are some core vt/selection changes in here, that was due to some
  cleanups needed for the speakup fixes. Those have all been acked by
  the various subsystem maintainers (i.e. me), so those are ok.

  We also added a few new drivers, for some odd hardware, giving new
  developers plenty to work on with basic coding style cleanups to come
  in the near future.

  Other than that, nothing unusual here.

  All of these have been in linux-next for a while with no reported
  issues, other than an odd gcc warning for one of the new drivers that
  should be fixed up soon"

[ I fixed up the warning myself  - Linus ]

* tag 'staging-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (663 commits)
  staging: kpc2000: kpc_spi: Fix build error for {read,write}q
  Staging: rtl8192e: Remove extra space before break statement
  Staging: rtl8192u: ieee80211: Fix if-else indentation warning
  Staging: rtl8192u: ieee80211: Fix indentation errors by removing extra spaces
  staging: most: cdev: fix chrdev_region leak in mod_exit
  staging: wlan-ng: Fix improper SPDX comment style
  staging: rtl8192u: ieee80211: Resolve ERROR reported by checkpatch
  staging: vc04_services: bcm2835-camera: Compress two lines into one line
  staging: rtl8723bs: core: Use !x in place of NULL comparison.
  staging: rtl8723bs: core: Prefer using the BIT Macro.
  staging: fieldbus: anybus-s: fix wait_for_completion_timeout return handling
  staging: kpc2000: fix up build problems with readq()
  staging: rtlwifi: move remaining phydm .h files
  staging: rtlwifi: strip down phydm .h files
  staging: rtlwifi: delete the staging driver
  staging: fieldbus: anybus-s: rename bus id field to avoid confusion
  staging: fieldbus: anybus-s: keep device bus id in bus endianness
  Staging: sm750fb: Change *array into *const array
  staging: rtl8192u: ieee80211: Fix spelling mistake
  staging: rtl8192u: ieee80211: Replace bit shifting with BIT macro
  ...

1 files changed, 437 insertions, 0 deletions

diff --git a/drivers/staging/kpc2000/kpc2000/core.c b/drivers/staging/kpc2000/kpc2000/core.c
new file mode 100644
index 000000000000..40390cdd3c8d
--- /dev/null
+++ b/drivers/staging/kpc2000/kpc2000/core.c
@@ -0,0 +1,437 @@
+// SPDX-License-Identifier: GPL-2.0+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <asm/io.h>
+#include <linux/io.h>
+#include <linux/mfd/core.h>
+#include <linux/platform_device.h>
+#include <linux/ioport.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/device.h>
+#include <linux/sched.h>
+#include <linux/jiffies.h>
+#include "pcie.h"
+
+
+/*******************************************************
+  * SysFS Attributes
+  ******************************************************/
+static ssize_t  show_attr(struct device *dev, struct device_attribute *attr, char *buf)
+{
+    struct pci_dev *pdev = to_pci_dev(dev);
+    struct kp2000_device *pcard;
+
+    if (!pdev)  return -ENXIO;
+    pcard = pci_get_drvdata(pdev);
+    if (!pcard)  return -ENXIO;
+    
+    if (strcmp("ssid", attr->attr.name) == 0){         return scnprintf(buf, PAGE_SIZE, "%016llx\n", pcard->ssid);  } else
+    if (strcmp("ddna", attr->attr.name) == 0){         return scnprintf(buf, PAGE_SIZE, "%016llx\n", pcard->ddna);  } else
+    if (strcmp("card_id", attr->attr.name) == 0){      return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->card_id);  } else
+    if (strcmp("hw_rev", attr->attr.name) == 0){       return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->hardware_revision);  } else
+    if (strcmp("build", attr->attr.name) == 0){        return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->build_version);  } else
+    if (strcmp("build_date", attr->attr.name) == 0){   return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->build_datestamp);  } else
+    if (strcmp("build_time", attr->attr.name) == 0){   return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->build_timestamp);  } else
+    { return -ENXIO; }
+}
+
+static ssize_t  show_cpld_config_reg(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct kp2000_device *pcard;
+	u64 val;
+
+	if (!pdev)
+		return -ENXIO;
+
+	pcard = pci_get_drvdata(pdev);
+	if (!pcard)
+		return -ENXIO;
+
+	val = readq(pcard->sysinfo_regs_base + REG_CPLD_CONFIG);
+	return scnprintf(buf, PAGE_SIZE, "%016llx\n", val);
+}
+static ssize_t cpld_reconfigure(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+    struct pci_dev *pdev = to_pci_dev(dev);
+    long wr_val;
+    struct kp2000_device *pcard;
+    int rv;
+
+    if (!pdev)  return -ENXIO;
+    pcard = pci_get_drvdata(pdev);
+    if (!pcard)  return -ENXIO;
+    
+    rv = kstrtol(buf, 0, &wr_val);
+    if (rv < 0)  return rv;
+    if (wr_val > 7)  return -EINVAL;
+    
+    wr_val = wr_val << 8;
+    wr_val |= 0x1; // Set the "Configure Go" bit
+    writeq(wr_val, pcard->sysinfo_regs_base + REG_CPLD_CONFIG);
+    return count;
+}
+
+
+DEVICE_ATTR(ssid,       0444, show_attr, NULL);
+DEVICE_ATTR(ddna,       0444, show_attr, NULL);
+DEVICE_ATTR(card_id,    0444, show_attr, NULL);
+DEVICE_ATTR(hw_rev,     0444, show_attr, NULL);
+DEVICE_ATTR(build,      0444, show_attr, NULL);
+DEVICE_ATTR(build_date, 0444, show_attr, NULL);
+DEVICE_ATTR(build_time, 0444, show_attr, NULL);
+DEVICE_ATTR(cpld_reg,   0444, show_cpld_config_reg, NULL);
+DEVICE_ATTR(cpld_reconfigure,   0220, NULL, cpld_reconfigure);
+
+static const struct attribute *  kp_attr_list[] = {
+    &dev_attr_ssid.attr,
+    &dev_attr_ddna.attr,
+    &dev_attr_card_id.attr,
+    &dev_attr_hw_rev.attr,
+    &dev_attr_build.attr,
+    &dev_attr_build_date.attr,
+    &dev_attr_build_time.attr,
+    &dev_attr_cpld_reg.attr,
+    &dev_attr_cpld_reconfigure.attr,
+    NULL,
+};
+
+
+/*******************************************************
+  * Functions
+  ******************************************************/
+
+static void wait_and_read_ssid(struct kp2000_device *pcard)
+{
+    u64 read_val = readq(pcard->sysinfo_regs_base + REG_FPGA_SSID);
+    unsigned long timeout;
+    
+    if (read_val & 0x8000000000000000){
+        pcard->ssid = read_val;
+        return;
+    }
+    
+    timeout = jiffies + (HZ * 2);
+    do {
+        read_val = readq(pcard->sysinfo_regs_base + REG_FPGA_SSID);
+        if (read_val & 0x8000000000000000){
+            pcard->ssid = read_val;
+            return;
+        }
+        cpu_relax();
+        //schedule();
+    } while (time_before(jiffies, timeout));
+    
+    dev_notice(&pcard->pdev->dev, "SSID didn't show up!\n");
+    
+    #if 0
+    // Timed out waiting for the SSID to show up, just use the DDNA instead?
+    read_val = readq(pcard->sysinfo_regs_base + REG_FPGA_DDNA);
+    pcard->ssid = read_val;
+    #else
+    // Timed out waiting for the SSID to show up, stick all zeros in the value
+    pcard->ssid = 0;
+    #endif
+}
+
+static int  read_system_regs(struct kp2000_device *pcard)
+{
+    u64 read_val;
+    
+    read_val = readq(pcard->sysinfo_regs_base + REG_MAGIC_NUMBER);
+    if (read_val != KP2000_MAGIC_VALUE){
+        dev_err(&pcard->pdev->dev, "Invalid magic!  Got: 0x%016llx  Want: 0x%016lx\n", read_val, KP2000_MAGIC_VALUE);
+        return -EILSEQ;
+    }
+    
+    read_val = readq(pcard->sysinfo_regs_base + REG_CARD_ID_AND_BUILD);
+    pcard->card_id = (read_val & 0xFFFFFFFF00000000) >> 32;
+    pcard->build_version = (read_val & 0x00000000FFFFFFFF) >> 0;
+    
+    read_val = readq(pcard->sysinfo_regs_base + REG_DATE_AND_TIME_STAMPS);
+    pcard->build_datestamp = (read_val & 0xFFFFFFFF00000000) >> 32;
+    pcard->build_timestamp = (read_val & 0x00000000FFFFFFFF) >> 0;
+    
+    read_val = readq(pcard->sysinfo_regs_base + REG_CORE_TABLE_OFFSET);
+    pcard->core_table_length = (read_val & 0xFFFFFFFF00000000) >> 32;
+    pcard->core_table_offset = (read_val & 0x00000000FFFFFFFF) >> 0;
+    
+    wait_and_read_ssid(pcard);
+    
+    read_val = readq(pcard->sysinfo_regs_base + REG_FPGA_HW_ID);
+    pcard->core_table_rev    = (read_val & 0x0000000000000F00) >> 8;
+    pcard->hardware_revision = (read_val & 0x000000000000001F);
+    
+    read_val = readq(pcard->sysinfo_regs_base + REG_FPGA_DDNA);
+    pcard->ddna = read_val;
+    
+    dev_info(&pcard->pdev->dev, "system_regs: %08x %08x %08x %08x  %02x  %d %d  %016llx  %016llx\n",
+        pcard->card_id,
+        pcard->build_version,
+        pcard->build_datestamp,
+        pcard->build_timestamp,
+        pcard->hardware_revision,
+        pcard->core_table_rev,
+        pcard->core_table_length,
+        pcard->ssid,
+        pcard->ddna
+    );
+    
+    if (pcard->core_table_rev > 1){
+        dev_err(&pcard->pdev->dev, "core table entry revision is higher than we can deal with, cannot continue with this card!\n");
+        return 1;
+    }
+    
+    return 0;
+}
+
+irqreturn_t  kp2000_irq_handler(int irq, void *dev_id)
+{
+    struct kp2000_device  *pcard = (struct kp2000_device*)dev_id;
+    SetBackEndControl(pcard->dma_common_regs, KPC_DMA_CARD_IRQ_ENABLE | KPC_DMA_CARD_USER_INTERRUPT_MODE | KPC_DMA_CARD_USER_INTERRUPT_ACTIVE);
+    return IRQ_HANDLED;
+}
+
+int  kp2000_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+    int err = 0;
+    struct kp2000_device *pcard;
+    static int card_count = 1;
+    int rv;
+    unsigned long reg_bar_phys_addr;
+    unsigned long reg_bar_phys_len;
+    unsigned long dma_bar_phys_addr;
+    unsigned long dma_bar_phys_len;
+    u16 regval;
+ 
+    dev_dbg(&pdev->dev, "kp2000_pcie_probe(pdev = [%p], id = [%p])\n", pdev, id);
+    
+    //{ Step 1: Allocate a struct for the pcard
+    pcard = kzalloc(sizeof(struct kp2000_device), GFP_KERNEL);
+    if (NULL == pcard){
+        dev_err(&pdev->dev, "probe: failed to allocate private card data\n");
+        return -ENOMEM;
+    }
+    dev_dbg(&pdev->dev, "probe: allocated struct kp2000_device @ %p\n", pcard);
+    //}
+    
+    //{ Step 2: Initialize trivial pcard elements
+    pcard->card_num = card_count;
+    card_count++;
+    scnprintf(pcard->name, 16, "kpcard%d", pcard->card_num);
+    
+    mutex_init(&pcard->sem);
+    lock_card(pcard);
+    
+    pcard->pdev = pdev;
+    pci_set_drvdata(pdev, pcard);
+    //}
+    
+    //{ Step 3: Enable PCI device
+    err = pci_enable_device(pcard->pdev);
+    if (err){
+        dev_err(&pcard->pdev->dev, "probe: failed to enable PCIE2000 PCIe device (%d)\n", err);
+        goto out3;
+    }
+    //}
+    
+    //{ Step 4: Setup the Register BAR
+    reg_bar_phys_addr = pci_resource_start(pcard->pdev, REG_BAR);
+    reg_bar_phys_len = pci_resource_len(pcard->pdev, REG_BAR);
+    
+    pcard->regs_bar_base = ioremap_nocache(reg_bar_phys_addr, PAGE_SIZE);
+    if (NULL == pcard->regs_bar_base){
+        dev_err(&pcard->pdev->dev, "probe: REG_BAR could not remap memory to virtual space\n");
+        err = -ENODEV;
+        goto out4;
+    }
+    dev_dbg(&pcard->pdev->dev, "probe: REG_BAR virt hardware address start [%p]\n", pcard->regs_bar_base);
+    
+    err = pci_request_region(pcard->pdev, REG_BAR, KP_DRIVER_NAME_KP2000);
+    if (err){
+        iounmap(pcard->regs_bar_base);
+        dev_err(&pcard->pdev->dev, "probe: failed to acquire PCI region (%d)\n", err);
+        err = -ENODEV;
+        goto out4;
+    }
+    
+    pcard->regs_base_resource.start = reg_bar_phys_addr;
+    pcard->regs_base_resource.end   = reg_bar_phys_addr + reg_bar_phys_len - 1;
+    pcard->regs_base_resource.flags = IORESOURCE_MEM;
+    //}
+    
+    //{ Step 5: Setup the DMA BAR
+    dma_bar_phys_addr = pci_resource_start(pcard->pdev, DMA_BAR);
+    dma_bar_phys_len = pci_resource_len(pcard->pdev, DMA_BAR);
+    
+    pcard->dma_bar_base = ioremap_nocache(dma_bar_phys_addr, dma_bar_phys_len);
+    if (NULL == pcard->dma_bar_base){
+        dev_err(&pcard->pdev->dev, "probe: DMA_BAR could not remap memory to virtual space\n");
+        err = -ENODEV;
+        goto out5;
+    }
+    dev_dbg(&pcard->pdev->dev, "probe: DMA_BAR virt hardware address start [%p]\n", pcard->dma_bar_base);
+    
+    pcard->dma_common_regs = pcard->dma_bar_base + KPC_DMA_COMMON_OFFSET;
+    
+    err = pci_request_region(pcard->pdev, DMA_BAR, "kp2000_pcie");
+    if (err){
+        iounmap(pcard->dma_bar_base);
+        dev_err(&pcard->pdev->dev, "probe: failed to acquire PCI region (%d)\n", err);
+        err = -ENODEV;
+        goto out5;
+    }
+    
+    pcard->dma_base_resource.start = dma_bar_phys_addr;
+    pcard->dma_base_resource.end   = dma_bar_phys_addr + dma_bar_phys_len - 1;
+    pcard->dma_base_resource.flags = IORESOURCE_MEM;
+    //}
+    
+    //{ Step 6: System Regs
+    pcard->sysinfo_regs_base = pcard->regs_bar_base;
+    err = read_system_regs(pcard);
+    if (err)
+        goto out6;
+    
+    // Disable all "user" interrupts because they're not used yet.
+    writeq(0xFFFFFFFFFFFFFFFF, pcard->sysinfo_regs_base + REG_INTERRUPT_MASK);
+    //}
+    
+    //{ Step 7: Configure PCI thingies
+    // let the card master PCIe
+    pci_set_master(pcard->pdev);
+    // enable IO and mem if not already done
+    pci_read_config_word(pcard->pdev, PCI_COMMAND, &regval);
+    regval |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
+    pci_write_config_word(pcard->pdev, PCI_COMMAND, regval);
+    
+    // Clear relaxed ordering bit
+    pcie_capability_clear_and_set_word(pcard->pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN, 0);
+    
+    // Set Max_Payload_Size and Max_Read_Request_Size
+    regval = (0x0) << 5; // Max_Payload_Size = 128 B
+    pcie_capability_clear_and_set_word(pcard->pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_PAYLOAD, regval);
+    regval = (0x0) << 12; // Max_Read_Request_Size = 128 B
+    pcie_capability_clear_and_set_word(pcard->pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_READRQ, regval);
+    
+    // Enable error reporting for: Correctable Errors, Non-Fatal Errors, Fatal Errors, Unsupported Requests
+    pcie_capability_clear_and_set_word(pcard->pdev, PCI_EXP_DEVCTL, 0, PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE | PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE);
+    
+    err = dma_set_mask(PCARD_TO_DEV(pcard), DMA_BIT_MASK(64));
+    if (err){
+        dev_err(&pcard->pdev->dev, "CANNOT use DMA mask %0llx\n", DMA_BIT_MASK(64));
+        goto out7;
+    }
+    dev_dbg(&pcard->pdev->dev, "Using DMA mask %0llx\n", dma_get_mask(PCARD_TO_DEV(pcard)));
+    //}
+    
+    //{ Step 8: Configure IRQs
+    err = pci_enable_msi(pcard->pdev);
+    if (err < 0)
+        goto out8a;
+    
+    rv = request_irq(pcard->pdev->irq, kp2000_irq_handler, IRQF_SHARED, pcard->name, pcard);
+    if (rv){
+        dev_err(&pcard->pdev->dev, "kp2000_pcie_probe: failed to request_irq: %d\n", rv);
+        goto out8b;
+    }
+    //}
+    
+    //{ Step 9: Setup sysfs attributes
+    err = sysfs_create_files(&(pdev->dev.kobj), kp_attr_list);
+    if (err){
+        dev_err(&pdev->dev, "Failed to add sysfs files: %d\n", err);
+        goto out9;
+    }
+    //}
+    
+    //{ Step 10: Setup misc device
+    pcard->miscdev.minor = MISC_DYNAMIC_MINOR;
+    pcard->miscdev.fops = &kp2000_fops;
+    pcard->miscdev.parent = &pcard->pdev->dev;
+    pcard->miscdev.name = pcard->name;
+    
+    err = misc_register(&pcard->miscdev);
+    if (err){
+        dev_err(&pcard->pdev->dev, "kp2000_pcie_probe: misc_register failed: %d\n", err);
+        goto out10;
+    }
+    //}
+    
+    //{ Step 11: Probe cores
+    err = kp2000_probe_cores(pcard);
+    if (err)
+        goto out11;
+    //}
+    
+    //{ Step 12: Enable IRQs in HW
+    SetBackEndControl(pcard->dma_common_regs, KPC_DMA_CARD_IRQ_ENABLE | KPC_DMA_CARD_USER_INTERRUPT_MODE);
+    //}
+    
+    dev_dbg(&pcard->pdev->dev, "kp2000_pcie_probe() complete!\n");
+    unlock_card(pcard);
+    return 0;
+
+  out11:
+    misc_deregister(&pcard->miscdev);
+  out10:
+    sysfs_remove_files(&(pdev->dev.kobj), kp_attr_list);
+  out9:
+    free_irq(pcard->pdev->irq, pcard);
+  out8b:
+    pci_disable_msi(pcard->pdev);
+  out8a:
+  out7:
+  out6:
+    iounmap(pcard->dma_bar_base);
+    pci_release_region(pdev, DMA_BAR);
+    pcard->dma_bar_base = NULL;
+  out5:
+    iounmap(pcard->regs_bar_base);
+    pci_release_region(pdev, REG_BAR);
+    pcard->regs_bar_base = NULL;
+  out4:
+    pci_disable_device(pcard->pdev);
+  out3:
+    unlock_card(pcard);
+    kfree(pcard);
+    return err;
+}
+
+
+void  kp2000_pcie_remove(struct pci_dev *pdev)
+{
+    struct kp2000_device *pcard = pci_get_drvdata(pdev);
+
+    dev_dbg(&pdev->dev, "kp2000_pcie_remove(pdev=%p)\n", pdev);
+    
+    if (pcard == NULL)  return;
+    
+    lock_card(pcard);
+    kp2000_remove_cores(pcard);
+    mfd_remove_devices(PCARD_TO_DEV(pcard));
+    misc_deregister(&pcard->miscdev);
+    sysfs_remove_files(&(pdev->dev.kobj), kp_attr_list);
+    free_irq(pcard->pdev->irq, pcard);
+    pci_disable_msi(pcard->pdev);
+    if (pcard->dma_bar_base != NULL){
+        iounmap(pcard->dma_bar_base);
+        pci_release_region(pdev, DMA_BAR);
+        pcard->dma_bar_base = NULL;
+    }
+    if (pcard->regs_bar_base != NULL){
+        iounmap(pcard->regs_bar_base);
+        pci_release_region(pdev, REG_BAR);
+        pcard->regs_bar_base = NULL;
+    }
+    pci_disable_device(pcard->pdev);
+    pci_set_drvdata(pdev, NULL);
+    unlock_card(pcard);
+    kfree(pcard);
+}