omap3: Introduce OMAP3630

OMAP3630 is the latest in the family of OMAP3 devices
and among the changes it introduces are:

New OPP levels for new voltage and frequency levels. a bunch of
Bug fixes to various modules feature additions, notably with ISP,
sDMA etc.

Details about the chip is available here:
http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?templateId=6123&navigationId=12836&contentId=52606

Strategy used:
Strategy to introduce this device into Linux was discussed here:
Ref: http://marc.info/?t=125343303400003&r=1&w=2

Two approaches were available:
a) Consider 3630 generation of devices as a new family of silicon
b) Consider 3630 as an offshoot of 3430 family of devices

As a common consensus, (b) seems to be more valid for 3630 as:
* There are changes which are easily handled by using "FEATURES"
  infrastructure.
  For details how to do this, see thread:
  http://marc.info/?t=125050998500001&r=1&w=2
* Most of existing 34xx infrastructure can be reused(almost 90%+)
	- so no ugly if (cpu_is_omap34xx() || cpu_is_omap36xx())
	  all over the place
	- lesser chance of bugs due to reuse of proven code flow
	- 36xx specific handling can still be done where required
	  within the existing infrastructure

NOTE:
* If additional 34xx series are added, OMAP3430_REV_ESXXXX can be
  added on top of the existing 3630 ones are renumbered

This patch was tested on SDP3430, boot tested on 3630 platform using
3430sdp defconfig

Signed-off-by: Madhusudhan Chikkature Rajashekar <madhu.cr@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Cc: Allen Pais <allen.pais@ti.com>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Felipe Balbi <felipe.balbi@nokia.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Sanjeev Premi <premi@ti.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Sergio Alberto Aguirre Rodriguez <saaguirre@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

2 files changed, 27 insertions, 3 deletions

diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 88999eaf91b6..1c1511220890 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -209,7 +209,9 @@ void __init omap3_check_revision(void)
         hawkeye = (idcode >> 12) & 0xffff;
         rev = (idcode >> 28) & 0xff;
 
-        if (hawkeye == 0xb7ae) {
+        switch (hawkeye) {
+        case 0xb7ae:
+                /* Handle 34xx/35xx devices */
                 switch (rev) {
                 case 0: /* Take care of early samples */
                 case 1:
@@ -228,6 +230,21 @@ void __init omap3_check_revision(void)
                         /* Use the latest known revision as default */
                         omap_revision = OMAP3430_REV_ES3_1;
                 }
+                break;
+        case 0xb891:
+                /* Handle 36xx devices */
+                switch (rev) {
+                case 0:
+                        omap_revision = OMAP3630_REV_ES1_0;
+                        break;
+                default:
+                        /* Use the latest known revision as default */
+                        omap_revision = OMAP3630_REV_ES1_0;
+                }
+                break;
+        default:
+                /* Unknown default to latest silicon rev as default*/
+                omap_revision = OMAP3630_REV_ES1_0;
         }
 }
 
@@ -249,9 +266,10 @@ void __init omap3_cpuinfo(void)
          * on available features. Upon detection, update the CPU id
          * and CPU class bits.
          */
-        if (omap3_has_iva() && omap3_has_sgx()) {
+        if (cpu_is_omap3630())
+                strcpy(cpu_name, "3630");
+        else if (omap3_has_iva() && omap3_has_sgx())
                 strcpy(cpu_name, "3430/3530");
-        }
         else if (omap3_has_sgx()) {
                 omap_revision = OMAP3525_REV(rev);
                 strcpy(cpu_name, "3525");
diff --git a/arch/arm/plat-omap/include/plat/cpu.h b/arch/arm/plat-omap/include/plat/cpu.h
index a67439327de3..f4f7a2f0c036 100644
--- a/arch/arm/plat-omap/include/plat/cpu.h
+++ b/arch/arm/plat-omap/include/plat/cpu.h
@@ -180,6 +180,7 @@ IS_OMAP_CLASS(34xx, 0x34)
 IS_OMAP_SUBCLASS(242x, 0x242)
 IS_OMAP_SUBCLASS(243x, 0x243)
 IS_OMAP_SUBCLASS(343x, 0x343)
+IS_OMAP_SUBCLASS(363x, 0x363)
 
 #define cpu_is_omap7xx()                0
 #define cpu_is_omap15xx()               0
@@ -325,6 +326,7 @@ IS_OMAP_TYPE(3430, 0x3430)
 #define cpu_is_omap3525()               0
 #define cpu_is_omap3530()               0
 #define cpu_is_omap3430()               0
+#define cpu_is_omap3630()               0
 
 /*
  * Whether we have MULTI_OMAP1 or not, we still need to distinguish
@@ -389,6 +391,8 @@ IS_OMAP_TYPE(3430, 0x3430)
                                                 (omap3_has_sgx()) &&    \
                                                 (!omap3_has_iva()))
 # define cpu_is_omap3530()              (cpu_is_omap3430())
+# undef cpu_is_omap3630
+# define cpu_is_omap3630()              is_omap363x()
 #endif
 
 # if defined(CONFIG_ARCH_OMAP4)
@@ -419,6 +423,8 @@ IS_OMAP_TYPE(3430, 0x3430)
 #define OMAP3430_REV_ES3_0      0x34303034
 #define OMAP3430_REV_ES3_1      0x34304034
 
+#define OMAP3630_REV_ES1_0      0x36300034
+
 #define OMAP35XX_CLASS          0x35000034
 #define OMAP3503_REV(v)         (OMAP35XX_CLASS | (0x3503 << 16) | (v << 12))
 #define OMAP3515_REV(v)         (OMAP35XX_CLASS | (0x3515 << 16) | (v << 12))