copper: Enable CE2 clocks.
Change-Id: I915f16ea30f4173fbd4e7cea186ed894b1933f49
diff --git a/platform/copper/acpuclock.c b/platform/copper/acpuclock.c
index 8a9f96d..28cd204 100644
--- a/platform/copper/acpuclock.c
+++ b/platform/copper/acpuclock.c
@@ -1,35 +1,36 @@
-/*
- * Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * Neither the name of Code Aurora nor
- * the names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior written
- * permission.
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <err.h>
#include <assert.h>
#include <debug.h>
#include <reg.h>
+#include <platform/timer.h>
#include <platform/iomap.h>
#include <mmc.h>
#include <clock.h>
@@ -73,12 +74,12 @@
mdelay(20);
/* Take usb block out of reset */
- writel(0, USB_HS_BCR);
+ writel(0, USB_HS_BCR);
mdelay(20);
ret = clk_enable(iclk);
-
+
if(ret)
{
dprintf(CRITICAL, "failed to set usb_iface_clk after async ret = %d\n", ret);
@@ -168,3 +169,123 @@
ASSERT(0);
}
}
+
+/* Function to asynchronously reset CE.
+ * Function assumes that all the CE clocks are off.
+ */
+static void ce_async_reset(uint8_t instance)
+{
+ if (instance == 1)
+ {
+ /* TODO: Add support for instance 1. */
+ dprintf(CRITICAL, "CE instance not supported instance = %d", instance);
+ ASSERT(0);
+ }
+ else if (instance == 2)
+ {
+ /* Start the block reset for CE */
+ writel(1, GCC_CE2_BCR);
+
+ udelay(2);
+
+ /* Take CE block out of reset */
+ writel(0, GCC_CE2_BCR);
+
+ udelay(2);
+ }
+ else
+ {
+ dprintf(CRITICAL, "CE instance not supported instance = %d", instance);
+ ASSERT(0);
+ }
+}
+
+static void clock_ce_enable(uint8_t instance)
+{
+ int ret;
+ char clk_name[64];
+
+ snprintf(clk_name, 64, "ce%u_src_clk", instance);
+ ret = clk_get_set_enable(clk_name, 100000000, 1);
+ if(ret)
+ {
+ dprintf(CRITICAL, "failed to set ce_src_clk ret = %d\n", ret);
+ ASSERT(0);
+ }
+
+ snprintf(clk_name, 64, "ce%u_core_clk", instance);
+ ret = clk_get_set_enable(clk_name, 0, 1);
+ if(ret)
+ {
+ dprintf(CRITICAL, "failed to set ce_core_clk ret = %d\n", ret);
+ ASSERT(0);
+ }
+
+ snprintf(clk_name, 64, "ce%u_ahb_clk", instance);
+ ret = clk_get_set_enable(clk_name, 0, 1);
+ if(ret)
+ {
+ dprintf(CRITICAL, "failed to set ce_ahb_clk ret = %d\n", ret);
+ ASSERT(0);
+ }
+
+ snprintf(clk_name, 64, "ce%u_axi_clk", instance);
+ ret = clk_get_set_enable(clk_name, 0, 1);
+ if(ret)
+ {
+ dprintf(CRITICAL, "failed to set ce_axi_clk ret = %d\n", 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);
+}
+
+static 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, 64, "ce%u_src_clk", instance);
+ src_clk = clk_get(clk_name);
+
+ snprintf(clk_name, 64, "ce%u_ahb_clk", instance);
+ ahb_clk = clk_get(clk_name);
+
+ snprintf(clk_name, 64, "ce%u_axi_clk", instance);
+ axi_clk = clk_get(clk_name);
+
+ snprintf(clk_name, 64, "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);
+}
+
+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);
+}