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>

diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 88999ea..1c15112 100644 (file)
--- 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 a674393..f4f7a2f 100644 (file)
--- 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))