#define SLCR_LOCK_MAGIC 0x767B
#define SLCR_UNLOCK_MAGIC 0xDF0D
+#define SLCR_USB_L1_SEL 0x04
+
#define SLCR_IDCODE_MASK 0x1F000
#define SLCR_IDCODE_SHIFT 12
+/*
+ * zynq_slcr_mio_get_status - Get the status of MIO peripheral.
+ *
+ * @peri_name: Name of the peripheral for checking MIO status
+ * @get_pins: Pointer to array of get pin for this peripheral
+ * @num_pins: Number of pins for this peripheral
+ * @mask: Mask value
+ * @check_val: Required check value to get the status of periph
+ */
+struct zynq_slcr_mio_get_status {
+ const char *peri_name;
+ const int *get_pins;
+ int num_pins;
+ u32 mask;
+ u32 check_val;
+};
+
+static const int usb0_pins[] = {
+ 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39
+};
+
+static const int usb1_pins[] = {
+ 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
+};
+
+static const struct zynq_slcr_mio_get_status mio_periphs[] = {
+ {
+ "usb0",
+ usb0_pins,
+ ARRAY_SIZE(usb0_pins),
+ SLCR_USB_L1_SEL,
+ SLCR_USB_L1_SEL,
+ },
+ {
+ "usb1",
+ usb1_pins,
+ ARRAY_SIZE(usb1_pins),
+ SLCR_USB_L1_SEL,
+ SLCR_USB_L1_SEL,
+ },
+};
+
static int slcr_lock = 1; /* 1 means locked, 0 means unlocked */
void zynq_slcr_lock(void)
{
- if (!slcr_lock)
+ if (!slcr_lock) {
writel(SLCR_LOCK_MAGIC, &slcr_base->slcr_lock);
+ slcr_lock = 1;
+ }
}
void zynq_slcr_unlock(void)
{
- if (slcr_lock)
+ if (slcr_lock) {
writel(SLCR_UNLOCK_MAGIC, &slcr_base->slcr_unlock);
+ slcr_lock = 0;
+ }
}
/* Reset the entire system */
zynq_slcr_unlock();
/* Disable AXI interface by asserting FPGA resets */
- writel(0xFFFFFFFF, &slcr_base->fpga_rst_ctrl);
+ writel(0xF, &slcr_base->fpga_rst_ctrl);
/* Set Level Shifters DT618760 */
writel(0xA, &slcr_base->lvl_shftr_en);
return (readl(&slcr_base->pss_idcode) & SLCR_IDCODE_MASK) >>
SLCR_IDCODE_SHIFT;
}
+
+/*
+ * zynq_slcr_get_mio_pin_status - Get the MIO pin status of peripheral.
+ *
+ * @periph: Name of the peripheral
+ *
+ * Returns count to indicate the number of pins configured for the
+ * given @periph.
+ */
+int zynq_slcr_get_mio_pin_status(const char *periph)
+{
+ const struct zynq_slcr_mio_get_status *mio_ptr;
+ int val, i, j;
+ int mio = 0;
+
+ for (i = 0; i < ARRAY_SIZE(mio_periphs); i++) {
+ if (strcmp(periph, mio_periphs[i].peri_name) == 0) {
+ mio_ptr = &mio_periphs[i];
+ for (j = 0; j < mio_ptr->num_pins; j++) {
+ val = readl(&slcr_base->mio_pin
+ [mio_ptr->get_pins[j]]);
+ if ((val & mio_ptr->mask) == mio_ptr->check_val)
+ mio++;
+ }
+ break;
+ }
+ }
+
+ return mio;
+}