platform/target: mdm9607: Changes supports signed boot image authentication
These changes are needed for authenticating the boot.img
signed with traditional way.
Change-Id: Ib993e70f890b137f601e325c77e1638508b33a19
diff --git a/platform/mdm9607/acpuclock.c b/platform/mdm9607/acpuclock.c
index bd068ad..6c8e838 100644
--- a/platform/mdm9607/acpuclock.c
+++ b/platform/mdm9607/acpuclock.c
@@ -115,3 +115,107 @@
ASSERT(0);
}
}
+
+void clock_ce_enable(uint8_t instance)
+{
+ int ret;
+ char clk_name[64];
+
+ snprintf(clk_name, sizeof(clk_name), "ce%u_src_clk", instance);
+ ret = clk_get_set_enable(clk_name, 160000000, 1);
+ if(ret)
+ {
+ dprintf(CRITICAL, "failed to set ce%u_src_clk ret = %d\n", instance, ret);
+ ASSERT(0);
+ }
+
+ snprintf(clk_name, sizeof(clk_name), "ce%u_core_clk", instance);
+ ret = clk_get_set_enable(clk_name, 0, 1);
+ if(ret)
+ {
+ dprintf(CRITICAL, "failed to set ce%u_core_clk ret = %d\n", instance, ret);
+ ASSERT(0);
+ }
+
+ snprintf(clk_name, sizeof(clk_name), "ce%u_ahb_clk", instance);
+ ret = clk_get_set_enable(clk_name, 0, 1);
+ if(ret)
+ {
+ dprintf(CRITICAL, "failed to set ce%u_ahb_clk ret = %d\n", instance, ret);
+ ASSERT(0);
+ }
+
+ snprintf(clk_name, sizeof(clk_name), "ce%u_axi_clk", instance);
+ ret = clk_get_set_enable(clk_name, 0, 1);
+ if(ret)
+ {
+ dprintf(CRITICAL, "failed to set ce%u_axi_clk ret = %d\n", instance, ret);
+ ASSERT(0);
+ }
+
+ /* Wait for 48 * #pipes cycles.
+ * This is necessary as immediately after an access control reset (boot up)
+ * or a debug re-enable, the Crypto core sequentially clears its internal
+ * pipe key storage memory. If pipe key initialization writes are attempted
+ * during this time, they may be overwritten by the internal clearing logic.
+ */
+ udelay(1);
+}
+void clock_ce_disable(uint8_t instance)
+{
+ struct clk *ahb_clk;
+ struct clk *cclk;
+ struct clk *axi_clk;
+ struct clk *src_clk;
+ char clk_name[64];
+
+ snprintf(clk_name, sizeof(clk_name), "ce%u_src_clk", instance);
+ src_clk = clk_get(clk_name);
+
+ snprintf(clk_name, sizeof(clk_name), "ce%u_ahb_clk", instance);
+ ahb_clk = clk_get(clk_name);
+
+ snprintf(clk_name, sizeof(clk_name), "ce%u_axi_clk", instance);
+ axi_clk = clk_get(clk_name);
+
+ snprintf(clk_name, sizeof(clk_name), "ce%u_core_clk", instance);
+ cclk = clk_get(clk_name);
+
+ clk_disable(ahb_clk);
+ clk_disable(axi_clk);
+ clk_disable(cclk);
+ clk_disable(src_clk);
+
+ /* Some delay for the clocks to stabalize. */
+ udelay(1);
+}
+/* Function to asynchronously reset CE.
+ * Function assumes that all the CE clocks are off.
+ */
+static void ce_async_reset(uint8_t instance)
+{
+ /* Start the block reset for CE */
+ writel(1, GCC_CRYPTO_BCR);
+
+ udelay(2);
+
+ /* Take CE block out of reset */
+ writel(0, GCC_CRYPTO_BCR);
+
+ udelay(2);
+}
+
+void clock_config_ce(uint8_t instance)
+{
+ /* Need to enable the clock before disabling since the clk_disable()
+ * has a check to default to nop when the clk_enable() is not called
+ * on that particular clock.
+ */
+ clock_ce_enable(instance);
+
+ clock_ce_disable(instance);
+
+ ce_async_reset(instance);
+
+ clock_ce_enable(instance);
+}