diff options
Diffstat (limited to 'drivers/usb/otg/ab5500-usb.c')
| -rw-r--r-- | drivers/usb/otg/ab5500-usb.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/usb/otg/ab5500-usb.c b/drivers/usb/otg/ab5500-usb.c index aa439f6d4e2..1f54ef4a356 100644 --- a/drivers/usb/otg/ab5500-usb.c +++ b/drivers/usb/otg/ab5500-usb.c @@ -47,6 +47,9 @@ #define USB_PROBE_DELAY 1000 /* 1 seconds */ +#define PUBLIC_ID_BACKUPRAM1 (U5500_BACKUPRAM1_BASE + 0x0FC0) +#define MAX_USB_SERIAL_NUMBER_LEN 31 + /* UsbLineStatus register - usb types */ enum ab8500_usb_link_status { USB_LINK_NOT_CONFIGURED, @@ -466,6 +469,55 @@ irq_fail: return err; } +/* Sys interfaces */ +static ssize_t +serial_number_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + u32 bufer[5]; + void __iomem *backup_ram = NULL; + backup_ram = ioremap(PUBLIC_ID_BACKUPRAM1, 0x14); + + if (backup_ram) { + bufer[0] = readl(backup_ram); + bufer[1] = readl(backup_ram + 4); + bufer[2] = readl(backup_ram + 8); + bufer[3] = readl(backup_ram + 0x0c); + bufer[4] = readl(backup_ram + 0x10); + + snprintf(buf, MAX_USB_SERIAL_NUMBER_LEN+1, + "%.8X%.8X%.8X%.8X%.8X", + bufer[0], bufer[1], bufer[2], bufer[3], bufer[4]); + + iounmap(backup_ram); + } else + dev_err(dev, "$$\n"); + + return strlen(buf); +} + + +static DEVICE_ATTR(serial_number, 0644, serial_number_show, NULL); + +static struct attribute *ab5500_usb_attributes[] = { + &dev_attr_serial_number.attr, + NULL +}; +static const struct attribute_group ab5500_attr_group = { + .attrs = ab5500_usb_attributes, +}; + +static int ab5500_create_sysfsentries(struct ab5500_usb *ab) +{ + int err; + + err = sysfs_create_group(&ab->dev->kobj, &ab5500_attr_group); + if (err) + sysfs_remove_group(&ab->dev->kobj, &ab5500_attr_group); + + return err; +} + /** * ab5500_usb_boot_detect : detect the USB cable during boot time. * @mode: value for mode. @@ -708,6 +760,10 @@ static int __devinit ab5500_usb_probe(struct platform_device *pdev) if (err < 0) goto fail1; + err = ab5500_create_sysfsentries(ab); + if (err < 0) + dev_err(ab->dev, "usb create sysfs entries failed\n"); + return 0; fail1: |