[src/trunk]: src/sys/arch/arm/omap Implement prcm_module_enable and prcm_modu...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2daee50257d3
branches:  trunk
changeset: 783217:2daee50257d3
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Tue Dec 11 18:53:26 2012 +0000

description:
Implement prcm_module_enable and prcm_module_disable for the AM335x.

diffstat:

 sys/arch/arm/omap/am335x_prcm.c |  95 +++++++++++++++++++++++++++++++++++++++++
 sys/arch/arm/omap/am335x_prcm.h |  64 +++++++++++++++++++++++++++
 2 files changed, 159 insertions(+), 0 deletions(-)

diffs (167 lines):

diff -r 081e677c2496 -r 2daee50257d3 sys/arch/arm/omap/am335x_prcm.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/omap/am335x_prcm.c   Tue Dec 11 18:53:26 2012 +0000
@@ -0,0 +1,95 @@
+/*     $NetBSD: am335x_prcm.c,v 1.1 2012/12/11 18:53:26 riastradh Exp $        */
+
+/*
+ * TI OMAP Power, Reset, and Clock Management on the AM335x
+ */
+
+/*-
+ * Copyright (c) 2012 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Taylor R. Campbell.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION 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 <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: am335x_prcm.c,v 1.1 2012/12/11 18:53:26 riastradh Exp $");
+
+#include <sys/types.h>
+#include <sys/param.h>
+
+#include <arm/omap/am335x_prcm.h>
+#include <arm/omap/omap2_prcm.h>
+
+#define AM335X_CLKCTRL_MODULEMODE_MASK         __BITS(0, 1)
+#define   AM335X_CLKCTRL_MODULEMODE_DISABLED   0
+#define   AM335X_CLKCTRL_MODULEMODE_ENABLE     2
+
+static void
+am335x_prcm_check_clkctrl(bus_size_t cm_module,
+    bus_size_t clkctrl_reg, uint32_t v)
+{
+#ifdef DIAGNOSTIC
+       uint32_t u = prcm_read_4(cm_module, clkctrl_reg);
+
+       if (__SHIFTOUT(u, AM335X_CLKCTRL_MODULEMODE_MASK) !=
+           __SHIFTOUT(v, AM335X_CLKCTRL_MODULEMODE_MASK))
+               aprint_error("clkctrl didn't take: %"PRIx32" -/-> %"PRIx32"\n",
+                   u, v);
+#else
+       (void)cm_module;
+       (void)clkctrl_reg;
+       (void)v;
+#endif
+}
+
+void
+prcm_module_enable(const struct omap_module *om)
+{
+       bus_size_t cm_module = om->om_prcm_cm_module;
+       bus_size_t clkctrl_reg = om->om_prcm_cm_clkctrl_reg;
+       uint32_t clkctrl;
+
+       clkctrl = prcm_read_4(cm_module, clkctrl_reg);
+       clkctrl &=~ AM335X_CLKCTRL_MODULEMODE_MASK;
+       clkctrl |= __SHIFTIN(AM335X_CLKCTRL_MODULEMODE_ENABLE,
+           AM335X_CLKCTRL_MODULEMODE_MASK);
+       prcm_write_4(cm_module, clkctrl_reg, clkctrl);
+       am335x_prcm_check_clkctrl(cm_module, clkctrl_reg, clkctrl);
+}
+
+void
+prcm_module_disable(const struct omap_module *om)
+{
+       bus_size_t cm_module = om->om_prcm_cm_module;
+       bus_size_t clkctrl_reg = om->om_prcm_cm_clkctrl_reg;
+       uint32_t clkctrl;
+
+       clkctrl = prcm_read_4(cm_module, clkctrl_reg);
+       clkctrl &=~ AM335X_CLKCTRL_MODULEMODE_MASK;
+       clkctrl |= __SHIFTIN(AM335X_CLKCTRL_MODULEMODE_DISABLED,
+           AM335X_CLKCTRL_MODULEMODE_MASK);
+       prcm_write_4(cm_module, clkctrl_reg, clkctrl);
+       am335x_prcm_check_clkctrl(cm_module, clkctrl_reg, clkctrl);
+}
diff -r 081e677c2496 -r 2daee50257d3 sys/arch/arm/omap/am335x_prcm.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/omap/am335x_prcm.h   Tue Dec 11 18:53:26 2012 +0000
@@ -0,0 +1,64 @@
+/*     $NetBSD: am335x_prcm.h,v 1.1 2012/12/11 18:53:26 riastradh Exp $        */
+
+/*
+ * TI OMAP Power, Reset, and Clock Management on the AM335x
+ */
+
+/*-
+ * Copyright (c) 2012 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Taylor R. Campbell.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION 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.
+ */
+
+#ifndef _ARM_OMAP_AM335X_PRCM_H_
+#define _ARM_OMAP_AM335X_PRCM_H_
+
+#include <sys/bus.h>
+
+struct omap_module {
+       bus_size_t om_prcm_cm_module;
+       bus_size_t om_prcm_cm_clkctrl_reg;
+};
+
+#define AM335X_PRCM_CM_PER     0x0000
+#define AM335X_PRCM_CM_WKUP    0x0400
+#define AM335X_PRCM_CM_DPLL    0x0500
+#define AM335X_PRCM_CM_MPU     0x0600
+#define AM335X_PRCM_CM_DEVICE  0x0700
+#define AM335X_PRCM_CM_RTC     0x0800
+#define AM335X_PRCM_CM_GFX     0x0900
+#define AM335X_PRCM_CM_CEFUSE  0x0a00
+
+#define AM335X_PRCM_PRM_IRQ    0x0b00
+#define AM335X_PRCM_PRM_PER    0x0c00
+#define AM335X_PRCM_PRM_WKUP   0x0d00
+#define AM335X_PRCM_PRM_MPU    0x0e00
+#define AM335X_PRCM_PRM_DEVICE 0x0f00
+#define AM335X_PRCM_PRM_RTC    0x1000
+#define AM335X_PRCM_PRM_GFX    0x1100
+#define AM335X_PRCM_PRM_CEFUSE 0x1200
+
+#endif  /* _ARM_OMAP_AM335X_PRCM_H_ */