+
+
+#if defined(CONFIG_SYSFS) && !defined(CONFIG_GT64260)
+/* Export the hotswap register via sysfs for enum event monitoring */
+#define VAL_LEN_MAX 11 /* 32-bit hex or dec stringified number + '\n' */
+
+DECLARE_MUTEX(mv64xxx_hs_lock);
+
+static ssize_t
+mv64xxx_hs_reg_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
+{
+ u32 v;
+ u8 save_exclude;
+
+ if (off > 0)
+ return 0;
+ if (count < VAL_LEN_MAX)
+ return -EINVAL;
+
+ if (down_interruptible(&mv64xxx_hs_lock))
+ return -ERESTARTSYS;
+ save_exclude = mv64x60_pci_exclude_bridge;
+ mv64x60_pci_exclude_bridge = 0;
+ early_read_config_dword(&sysfs_hose_a, 0, PCI_DEVFN(0, 0),
+ MV64360_PCICFG_CPCI_HOTSWAP, &v);
+ mv64x60_pci_exclude_bridge = save_exclude;
+ up(&mv64xxx_hs_lock);
+
+ return sprintf(buf, "0x%08x\n", v);
+}
+
+static ssize_t
+mv64xxx_hs_reg_write(struct kobject *kobj, char *buf, loff_t off, size_t count)
+{
+ u32 v;
+ u8 save_exclude;
+
+ if (off > 0)
+ return 0;
+ if (count <= 0)
+ return -EINVAL;
+
+ if (sscanf(buf, "%i", &v) == 1) {
+ if (down_interruptible(&mv64xxx_hs_lock))
+ return -ERESTARTSYS;
+ save_exclude = mv64x60_pci_exclude_bridge;
+ mv64x60_pci_exclude_bridge = 0;
+ early_write_config_dword(&sysfs_hose_a, 0, PCI_DEVFN(0, 0),
+ MV64360_PCICFG_CPCI_HOTSWAP, v);
+ mv64x60_pci_exclude_bridge = save_exclude;
+ up(&mv64xxx_hs_lock);
+ }
+ else
+ count = -EINVAL;
+
+ return count;
+}
+
+static struct bin_attribute mv64xxx_hs_reg_attr = { /* Hotswap register */
+ .attr = {
+ .name = "hs_reg",
+ .mode = S_IRUGO | S_IWUSR,
+ .owner = THIS_MODULE,
+ },
+ .size = VAL_LEN_MAX,
+ .read = mv64xxx_hs_reg_read,
+ .write = mv64xxx_hs_reg_write,
+};
+
+/* Provide sysfs file indicating if this platform supports the hs_reg */
+static ssize_t
+mv64xxx_hs_reg_valid_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev;
+ struct mv64xxx_pdata *pdp;
+ u32 v;
+
+ pdev = container_of(dev, struct platform_device, dev);
+ pdp = (struct mv64xxx_pdata *)pdev->dev.platform_data;
+
+ if (down_interruptible(&mv64xxx_hs_lock))
+ return -ERESTARTSYS;
+ v = pdp->hs_reg_valid;
+ up(&mv64xxx_hs_lock);
+
+ return sprintf(buf, "%i\n", v);
+}
+static DEVICE_ATTR(hs_reg_valid, S_IRUGO, mv64xxx_hs_reg_valid_show, NULL);
+
+static int __init
+mv64xxx_sysfs_init(void)
+{
+ sysfs_create_bin_file(&mv64xxx_device.dev.kobj, &mv64xxx_hs_reg_attr);
+ sysfs_create_file(&mv64xxx_device.dev.kobj,&dev_attr_hs_reg_valid.attr);
+ return 0;
+}
+subsys_initcall(mv64xxx_sysfs_init);
+#endif