+#define MMC_POLL_RATE msecs_to_jiffies(1000)
+
+static void lubbock_mmc_poll(unsigned long);
+static irqreturn_t (*mmc_detect_int)(int, void *, struct pt_regs *);
+
+static struct timer_list mmc_timer = {
+ .function = lubbock_mmc_poll,
+};
+
+static void lubbock_mmc_poll(unsigned long data)
+{
+ unsigned long flags;
+
+ /* clear any previous irq state, then ... */
+ local_irq_save(flags);
+ LUB_IRQ_SET_CLR &= ~(1 << 0);
+ local_irq_restore(flags);
+
+ /* poll until mmc/sd card is removed */
+ if (LUB_IRQ_SET_CLR & (1 << 0))
+ mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
+ else {
+ (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data, NULL);
+ enable_irq(LUBBOCK_SD_IRQ);
+ }
+}
+
+static irqreturn_t lubbock_detect_int(int irq, void *data, struct pt_regs *regs)
+{
+ /* IRQ is level triggered; disable, and poll for removal */
+ disable_irq(irq);
+ mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
+
+ return mmc_detect_int(irq, data, regs);
+}
+
+static int lubbock_mci_init(struct device *dev,
+ irqreturn_t (*detect_int)(int, void *, struct pt_regs *),
+ void *data)