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authorThara Gopinath <thara@ti.com>2010-02-24 12:05:58 -0700
committerPaul Walmsley <paul@pwsan.com>2010-02-24 12:05:58 -0700
commit358f0e630d5409ab3837b86db3595560eae773b6 (patch)
tree0b4d6d8c555bee693f50819e7d717a43548643a5 /arch/arm/plat-omap
parent5eb75f557843132da08938609def2774ee467d95 (diff)
downloadop-kernel-dev-358f0e630d5409ab3837b86db3595560eae773b6.zip
op-kernel-dev-358f0e630d5409ab3837b86db3595560eae773b6.tar.gz
OMAP3: hwmod: support to specify the offset position of various SYSCONFIG register bits.
In OMAP3 Some modules like Smartreflex do not have the regular sysconfig register.Instead clockactivity bits are part of another register at a different bit position than the usual bit positions 8 and 9. In OMAP4, a new scheme is available due to the new protocol between the PRCM and the IPs. Depending of the scheme, the SYSCONFIG bitfields position will be different. The IP_REVISION register should be at offset 0x00. It should contain a SCHEME field. From this we can determine whether the IP follows legacy scheme or the new scheme. 31:30 SCHEME Used to distinguish between old scheme and current. Read 0x0: Legacy protocol. Read 0x1: New PRCM protocol defined for new OMAP4 IPs For legacy IP 13:12 MIDLEMODE 11:8 CLOCKACTIVITY 6 EMUSOFT 5 EMUFREE 4:3 SIDLEMODE 2 ENAWAKEUP 1 SOFTRESET 0 AUTOIDLE For new OMAP4 IP's, the bit position in SYSCONFIG is (for simple target): 5:4 STANDBYMODE (Ex MIDLEMODE) 3:2 IDLEMODE (Ex SIDLEMODE) 1 FREEEMU (Ex EMUFREE) 0 SOFTRESET Unfortunately In OMAP4 also some IPs will not follow any of these two schemes. This is the case at least for McASP, SmartReflex and some security IPs. This patch introduces a new field sysc_fields in omap_hwmod_sysconfig which can be used by the hwmod structures to specify the offsets for the sysconfig register of the IP.Also two static structures omap_hwmod_sysc_type1 and omap_hwmod_sysc_type2 are defined which can be used directly to populate the sysc_fields if the IP follows legacy or new OMAP4 scheme. If the IP follows none of these two schemes a new omap_hwmod_sysc_fields structure has to be defined and passed as part of omap_hwmod_sysconfig. Signed-off-by: Thara Gopinath <thara@ti.com> Signed-off-by: Benoit Cousson <b-cousson@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/plat-omap')
-rw-r--r--arch/arm/plat-omap/include/plat/omap_hwmod.h73
1 files changed, 58 insertions, 15 deletions
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 921990e..665420e 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -33,25 +33,42 @@
#define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H
#include <linux/kernel.h>
+#include <linux/list.h>
#include <linux/ioport.h>
-
#include <plat/cpu.h>
struct omap_device;
-/* OCP SYSCONFIG bit shifts/masks */
-#define SYSC_MIDLEMODE_SHIFT 12
-#define SYSC_MIDLEMODE_MASK (0x3 << SYSC_MIDLEMODE_SHIFT)
-#define SYSC_CLOCKACTIVITY_SHIFT 8
-#define SYSC_CLOCKACTIVITY_MASK (0x3 << SYSC_CLOCKACTIVITY_SHIFT)
-#define SYSC_SIDLEMODE_SHIFT 3
-#define SYSC_SIDLEMODE_MASK (0x3 << SYSC_SIDLEMODE_SHIFT)
-#define SYSC_ENAWAKEUP_SHIFT 2
-#define SYSC_ENAWAKEUP_MASK (1 << SYSC_ENAWAKEUP_SHIFT)
-#define SYSC_SOFTRESET_SHIFT 1
-#define SYSC_SOFTRESET_MASK (1 << SYSC_SOFTRESET_SHIFT)
-#define SYSC_AUTOIDLE_SHIFT 0
-#define SYSC_AUTOIDLE_MASK (1 << SYSC_AUTOIDLE_SHIFT)
+extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type1;
+extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type2;
+
+/*
+ * OCP SYSCONFIG bit shifts/masks TYPE1. These are for IPs compliant
+ * with the original PRCM protocol defined for OMAP2420
+ */
+#define SYSC_TYPE1_MIDLEMODE_SHIFT 12
+#define SYSC_TYPE1_MIDLEMODE_MASK (0x3 << SYSC_MIDLEMODE_SHIFT)
+#define SYSC_TYPE1_CLOCKACTIVITY_SHIFT 8
+#define SYSC_TYPE1_CLOCKACTIVITY_MASK (0x3 << SYSC_CLOCKACTIVITY_SHIFT)
+#define SYSC_TYPE1_SIDLEMODE_SHIFT 3
+#define SYSC_TYPE1_SIDLEMODE_MASK (0x3 << SYSC_SIDLEMODE_SHIFT)
+#define SYSC_TYPE1_ENAWAKEUP_SHIFT 2
+#define SYSC_TYPE1_ENAWAKEUP_MASK (1 << SYSC_ENAWAKEUP_SHIFT)
+#define SYSC_TYPE1_SOFTRESET_SHIFT 1
+#define SYSC_TYPE1_SOFTRESET_MASK (1 << SYSC_SOFTRESET_SHIFT)
+#define SYSC_TYPE1_AUTOIDLE_SHIFT 0
+#define SYSC_TYPE1_AUTOIDLE_MASK (1 << SYSC_AUTOIDLE_SHIFT)
+
+/*
+ * OCP SYSCONFIG bit shifts/masks TYPE2. These are for IPs compliant
+ * with the new PRCM protocol defined for new OMAP4 IPs.
+ */
+#define SYSC_TYPE2_SOFTRESET_SHIFT 0
+#define SYSC_TYPE2_SOFTRESET_MASK (1 << SYSC_TYPE2_SOFTRESET_SHIFT)
+#define SYSC_TYPE2_SIDLEMODE_SHIFT 2
+#define SYSC_TYPE2_SIDLEMODE_MASK (0x3 << SYSC_TYPE2_SIDLEMODE_SHIFT)
+#define SYSC_TYPE2_MIDLEMODE_SHIFT 4
+#define SYSC_TYPE2_MIDLEMODE_MASK (0x3 << SYSC_TYPE2_MIDLEMODE_SHIFT)
/* OCP SYSSTATUS bit shifts/masks */
#define SYSS_RESETDONE_SHIFT 0
@@ -62,7 +79,6 @@ struct omap_device;
#define HWMOD_IDLEMODE_NO (1 << 1)
#define HWMOD_IDLEMODE_SMART (1 << 2)
-
/**
* struct omap_hwmod_irq_info - MPU IRQs used by the hwmod
* @name: name of the IRQ channel (module local name)
@@ -236,6 +252,24 @@ struct omap_hwmod_ocp_if {
#define CLOCKACT_TEST_NONE 0x3
/**
+ * struct omap_hwmod_sysc_fields - hwmod OCP_SYSCONFIG register field offsets.
+ * @midle_shift: Offset of the midle bit
+ * @clkact_shift: Offset of the clockactivity bit
+ * @sidle_shift: Offset of the sidle bit
+ * @enwkup_shift: Offset of the enawakeup bit
+ * @srst_shift: Offset of the softreset bit
+ * @autoidle_shift: Offset of the autoidle bit.
+ */
+struct omap_hwmod_sysc_fields {
+ u8 midle_shift;
+ u8 clkact_shift;
+ u8 sidle_shift;
+ u8 enwkup_shift;
+ u8 srst_shift;
+ u8 autoidle_shift;
+};
+
+/**
* struct omap_hwmod_sysconfig - hwmod OCP_SYSCONFIG/OCP_SYSSTATUS data
* @rev_offs: IP block revision register offset (from module base addr)
* @sysc_offs: OCP_SYSCONFIG register offset (from module base addr)
@@ -252,6 +286,14 @@ struct omap_hwmod_ocp_if {
* been associated with the clocks marked in @clockact. This field is
* only used if HWMOD_SET_DEFAULT_CLOCKACT is set (see below)
*
+ *
+ * @sysc_fields: structure containing the offset positions of various bits in
+ * SYSCONFIG register. This can be populated using omap_hwmod_sysc_type1 or
+ * omap_hwmod_sysc_type2 defined in omap_hwmod_common_data.c depending on
+ * whether the device ip is compliant with the original PRCM protocol
+ * defined for OMAP2420 or the new PRCM protocol for new OMAP4 IPs.
+ * If the device follows a differnt scheme for the sysconfig register ,
+ * then this field has to be populated with the correct offset structure.
*/
struct omap_hwmod_sysconfig {
u16 rev_offs;
@@ -260,6 +302,7 @@ struct omap_hwmod_sysconfig {
u8 idlemodes;
u8 sysc_flags;
u8 clockact;
+ struct omap_hwmod_sysc_fields *sysc_fields;
};
/**
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