fpga: zynq: Add support for loading bitstream

[platform/kernel/u-boot.git] / arch / arm / cpu / armv7 / zynq / slcr.c

diff --git a/arch/arm/cpu/armv7/zynq/slcr.c b/arch/arm/cpu/armv7/zynq/slcr.c
index 788a8fd..52048c6 100644 (file)
--- a/arch/arm/cpu/armv7/zynq/slcr.c
+++ b/arch/arm/cpu/armv7/zynq/slcr.c
@@ -28,6 +28,9 @@
 #define SLCR_LOCK_MAGIC                0x767B
 #define SLCR_UNLOCK_MAGIC      0xDF0D
 
+#define SLCR_IDCODE_MASK       0x1F000
+#define SLCR_IDCODE_SHIFT      12
+
 static int slcr_lock = 1; /* 1 means locked, 0 means unlocked */
 
 void zynq_slcr_lock(void)
@@ -61,3 +64,61 @@ void zynq_slcr_cpu_reset(void)
 
        writel(1, &slcr_base->pss_rst_ctrl);
 }
+
+/* Setup clk for network */
+void zynq_slcr_gem_clk_setup(u32 gem_id, u32 rclk, u32 clk)
+{
+       zynq_slcr_unlock();
+
+       if (gem_id > 1) {
+               printf("Non existing GEM id %d\n", gem_id);
+               goto out;
+       }
+
+       if (gem_id) {
+               /* Set divisors for appropriate frequency in GEM_CLK_CTRL */
+               writel(clk, &slcr_base->gem1_clk_ctrl);
+               /* Configure GEM_RCLK_CTRL */
+               writel(rclk, &slcr_base->gem1_rclk_ctrl);
+       } else {
+               /* Set divisors for appropriate frequency in GEM_CLK_CTRL */
+               writel(clk, &slcr_base->gem0_clk_ctrl);
+               /* Configure GEM_RCLK_CTRL */
+               writel(rclk, &slcr_base->gem0_rclk_ctrl);
+       }
+
+out:
+       zynq_slcr_lock();
+}
+
+void zynq_slcr_devcfg_disable(void)
+{
+       zynq_slcr_unlock();
+
+       /* Disable AXI interface */
+       writel(0xFFFFFFFF, &slcr_base->fpga_rst_ctrl);
+
+       /* Set Level Shifters DT618760 */
+       writel(0xA, &slcr_base->lvl_shftr_en);
+
+       zynq_slcr_lock();
+}
+
+void zynq_slcr_devcfg_enable(void)
+{
+       zynq_slcr_unlock();
+
+       /* Set Level Shifters DT618760 */
+       writel(0xF, &slcr_base->lvl_shftr_en);
+
+       /* Disable AXI interface */
+       writel(0x0, &slcr_base->fpga_rst_ctrl);
+
+       zynq_slcr_lock();
+}
+
+u32 zynq_slcr_get_idcode(void)
+{
+       return (readl(&slcr_base->pss_idcode) & SLCR_IDCODE_MASK) >>
+                                                       SLCR_IDCODE_SHIFT;
+}