View source for Linux Kernel 2.6.35.y

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= Introduction =

The currently supported machines are as follows:
* IGEP0020
* IGEP0030
* IGEP0032

The currently supported expansion boards are as follows:
* IGEP0022
* BASE0010 (Rev. A & Rev. B)

Binaries: latest stable kernel version is: '''2.6.35.13-5 (20110927)'''

{| border="1"
|-
! '''Platform''' 
! '''Sources''' 
! '''uImage binary''' 
! '''zImage binary''' 
! '''Modules binaries'''
|-
| &nbsp;IGEP00x0&nbsp; 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.35.13-5/linux-omap-2.6.35.13-5.tar.gz 2.6.35.13-5] ([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.35.13-5/linux-omap-2.6.35.13-5.tar.gz.md5 md5sum]) 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.35.13-5/uImage-2.6.35.13-5.bin uImage-2.6.35.13-5.bin] ([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.35.13-5/uImage-2.6.35.13-5.bin.md5 md5sum])
| [http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.35.13-5/zImage-2.6.35.13-5.bin zImage-2.6.35.13-5.bin] ([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.35.13-5/zImage-2.6.35.13-5.bin.md5 md5sum]) 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.35.13-5/modules-2.6.35.13-5.tar.gz modules-2.6.35.13-5] ([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.35.13-5/modules-2.6.35.13-5.tar.gz.md5 md5sum)]
|}

= Build kernel from sources =

Download the latest stable version sources and follow next steps: 

 wget http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.35.13-5/linux-omap-2.6.35.13-5.tar.gz
 tar xzf linux-omap-2.6.35.tar.gz
 cd [kernel version]

A generic configuration is provided for all IGEP machines, and can be used as
the default by

 make ARCH=arm CROSS_COMPILE=[your cross compiler] igep00x0_defconfig

Then build the kernel with:

 make ARCH=arm CROSS_COMPILE=[your cross compiler] uImage zImage modules

The result will be an uImage file in arch/arm/boot directory. You can install the kernel modules to your target rootfs 

 make ARCH=arm CROSS_COMPILE=[your cross compiler] modules_install INSTALL_MOD_PATH=[path to your target rootfs]

= Kernel Parameters =

This chapter describes some [[How do I edit my kernel command line | kernel command line]] parameters you can pass to the kernel during system startup. They also depend on the presence of the hardware with which they are associated.

The '''board.ei485''' parameter allows to use UART1 as RS232 port instead of EI485
  board.ei485=  [yes, no]
                Format: <string>
                no: disable ei485, use UART1 as RS232, supported by igep0020
                default: yes

The '''buddy''' parameter allows enable or disable expansion boards
  buddy=   [igep0022, base0010]
           Format: <string>
           igep0022: enable expansion board, supported by igep0020
                     board
           base0010: enable expansion board, supported by igep0030 
                     board and igep0032 (only rev. B)
           default: none

The '''buddy.revision''' parameter allows to pass hardware revision for buddy boards
  buddy.revision= [A, B]
           Format: <string>
           A: enable hardware buddy revision A, only available for base0010
           B: enable hardware buddy revision B, only available for base0010
           default: A

The '''buddy.modem''' parameter allows enable or disable modem
  buddy.modem=  [yes]
                Format: <string>
                yes: enable modem on buddy board, supported by igep0022 expansion board.
                default: none

== Scenarios ==

Consider the following situations: 

'''Scenario A.''' You have and IGEP0020 board plus IGEP0022 expansion board, then you should add in your [[How do I edit my kernel command line | kernel command line]]

 buddy=igep0022

Optionally, to enable the IGEP0022 modem which is disabled by default you should add in your [[How do I edit my kernel command line | kernel command line]]

 buddy=igep0022 buddy.modem=yes

<span style="color: rgb(255, 0, 0);">
NOTE: UART2 can be used for bluetooth OR modem in expansion board but NOT at same time. They are INCOMPATIBLE.
</span>

'''Scenario B.''' You have and IGEP0030 board plus BASE0010 expansion board, then you should add in your [[How do I edit my kernel command line | kernel command line]]

 buddy=base0010

'''Scenario C.''' You have and IGEP0030 board plus BASE0010 Rev. B expansion board, then you should add in your [[How do I edit my kernel command line | kernel command line]]

 buddy=base0010 buddy.revision=B

'''Scenario D.''' You have and IGEP0032 board plus BASE0010 Rev. B expansion board, then you should add in your [[How do I edit my kernel command line | kernel command line]]

 buddy=base0010 buddy.revision=B

= Layout =

Machine specific files are located in arch/arm/mach-omap2/ directory with
name board-igep*.c. Like :

* board-igep0020.c : For IGEP0020 machine
* board-igep0030.c : For IGEP0030 machine
* board-igep0032.c : For IGEP0032 machine

Expansion board files, also are located in arch/arm/mach-omap2/ directory with
name exp-*.c. Like :

* exp-igep0022.c : For IGEP0022 expansion board
* exp-base0010.c : For BASE0010 expansion board

= Adding New Expansion Boards =

This chapter is meant to be a starting point for people to learn how to add your  own expansion board in three steps.

== Step 1: Add new expansion board file ==

As you can see in Layout chapter, an expansion board is called exp-<your board name>.c and should be located in arch/arm/mach-omap2 directory, so the first step will be add a new file for your new expansion board. Following example creates a new expansion board file called exp-dummy.c (arch/arm/mach-omap2/exp-dummy.c)

<pre>
 #include <linux/kernel.h>
 #include <linux/init.h>

 void __init dummy_init(void)
 {
 	pr_info("Initializing expansion board ... \n");
 }
</pre>

next, add the new file to be built

 diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
 index 7505be9..a6572f2 100644
 --- a/arch/arm/mach-omap2/Makefile
 +++ b/arch/arm/mach-omap2/Makefile
 @@ -156,6 +156,7 @@ obj-$(CONFIG_MACH_IGEP0020)         += board-igep0020.o \
  obj-$(CONFIG_MACH_IGEP0030)            += board-igep0030.o \
                                            board-igep00x0.o \
                                            exp-base0010.o \
 +                                          exp-dummy.o \
                                            hsmmc.o
  obj-$(CONFIG_MACH_OMAP3_TOUCHBOOK)     += board-omap3touchbook.o \
                                            hsmmc.o

== Step 2: Register new expansion board ==

Now, edit board-igep00x0.h and add an identifier for the new expansion board, for example,

 diff --git a/arch/arm/mach-omap2/board-igep00x0.h b/arch/arm/mach-omap2/board-igep00x0.h
 index 6b9b677..a2325d7 100644
 --- a/arch/arm/mach-omap2/board-igep00x0.h
 +++ b/arch/arm/mach-omap2/board-igep00x0.h
 @@ -15,6 +15,7 @@
  #define IGEP00X0_BUDDY_NONE            0x01
  #define IGEP00X0_BUDDY_IGEP0022        0x01
  #define IGEP00X0_BUDDY_BASE0010        0x02
 +#define IGEP00X0_BUDDY_DUMMY           0x03
 
  #define IGEP00X0_BUDDY_HWREV_A         (1 << 0)
  #define IGEP00X0_BUDDY_HWREV_B         (1 << 1)

also, edit in board-igep00x0.c the buddy_early_param to add the new expansion board,

 diff --git a/arch/arm/mach-omap2/board-igep00x0.c b/arch/arm/mach-omap2/board-igep00x0.c
 index 2a2d8eb..f2b5b27 100644
 --- a/arch/arm/mach-omap2/board-igep00x0.c
 +++ b/arch/arm/mach-omap2/board-igep00x0.c
 @@ -192,6 +192,9 @@ static int __init buddy_early_param(char *str)
                 if (!strcmp(name, "base0010")) {
                         igep00x0_buddy_pdata.model = IGEP00X0_BUDDY_BASE0010;
                         pr_info("IGEP: IGEP0030 machine + BASE0010 (buddy)\n");
 +               } else if (!strcmp(name, "dummy")) {
 +                       igep00x0_buddy_pdata.model = IGEP00X0_BUDDY_DUMMY;
 +                       pr_info("IGEP: IGEP0030 machine + DUMMY (buddy)\n");
                 } else
                         pr_err("IGEP: Unknown buddy for IGEP0030 machine\n");
         }

== Step 3: Run expansion board initialization ==

Finally, modify the machine file and add support for the new expansion board, for example:

 diff --git a/arch/arm/mach-omap2/board-igep0030.c b/arch/arm/mach-omap2/board-igep0030.c
 index 2b97257..44b319d 100644
 --- a/arch/arm/mach-omap2/board-igep0030.c
 +++ b/arch/arm/mach-omap2/board-igep0030.c
 @@ -204,6 +204,8 @@ static struct omap_board_mux board_mux[] __initdata = {
 
  /* Expansion board: BASE0010 */
  extern void __init base0010_init(struct twl4030_platform_data *pdata);
 +/* Expansion board: DUMMY */
 +extern void __init dummy_init(void);
 
  static void __init igep0030_init(void)
  {
 @@ -223,6 +225,10 @@ static void __init igep0030_init(void)
         /* - BASE0010 (adds twl4030_pdata)  */
         if (igep00x0_buddy_pdata.model == IGEP00X0_BUDDY_BASE0010)
                 base0010_init(&twl4030_pdata);
 +       /* - DUMMY  */
 +       if (igep00x0_buddy_pdata.model == IGEP00X0_BUDDY_DUMMY)
 +               dummy_init();
 +
 
         /* Add twl4030 common data */
         omap3_pmic_get_config(&twl4030_pdata, TWL_COMMON_PDATA_USB |

= Changelog =
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=e620ef8e577d73681f16ab80471332286c1b9fd5 2011-09-27 Release 2.6.35.13-5]
** Fix mux handling for UART2
** Add support for IGEP0032 COM
** Support for BASE0010 Rev. B
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=52fb200d9d79a38cc72b8fd6f089e253f002e8ff 2011-09-12 Release 2.6.35.13-4]
** Fix MCP251X initialitzation.
** Fix various build problems when a CONFIG option is not selected
** Fix mux when using board.ei485 kernel parameter
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=be8031203a76375451fe3a46e4169cb1d743e0c7 2011-08-29 Release 2.6.35.13-3]
** Fix buddy initialization.
** Add Invertra dma workaround for DM3730
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=b69a01294639a4f4973d1ec8d0ef9d66ad2c8a48 2011-07-28 Release 2.6.35.13-2]
** Major rework to support IGEP boards and expansion boards
** Add support for hardware rev. E for IGEP0030
** Add support for OMAP3 ISP
** Fix musb issue, set has_tt flag
** Use IGEP x-loader partition scheme
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=e12ae1b0f2ada83aa5be8f6c23dda1e9a0ce4360 2011-05-26 Release 2.6.35.13-1]
** Fix failed to setup omapfb
** Add support for expansion board BASE0010
** Rename expansion boards to exp-<expansion name>.c
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=c2c0f964325b123e551f3791dc78ef80b8fb84c7 2011-05-02 Release 2.6.35.13-0]
** Rebased with longterm/linux-2.6.35.y (2.6.35.13)
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=620ce1126f4f154d01f3b870d54b875e5a768b8b 2011-04-08 Release 2.6.35.12-0]
** Rebased with longterm/linux-2.6.35.y (2.6.35.12)
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=4425bead2e2faf4602c7d2c7896fcbe96e12b644 2011-03-08 Release 2.6.35.11-0]
** Rebased with longterm/linux-2.6.35.y (2.6.35.11)
** Fix conflict between bluetooth and modem
** Fix missing omap_reserve functionality in IGEP module
** Fix IRQ for MCP251x driver
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=5f578909fcb5f2383aa91f07d45bd64fd0a82cbd 2011-01-17 Release 2.6.35.10-0]
** Rebased with longterm/linux-2.6.35.y (2.6.35.10)
** Add MADC driver
** Add TIDSPBRIDGE driver
** Fix MCSPI, disable channel after TX_ONLY transfer in PIO mode
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=c8a6de6ec4dabb4d7a8b6c2299da4b924700f200 2010-11-23 Release 2.6.35.9-0]
** Rebased with stable/2.6.35.9
** Add IGEP0022 expansion support by default
** Add EHCI support on OMAP3 IGEP module.
** Fix modem GPIO for IGEP v2 expansion board
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=a0af50a21ce7b97218704e45a3e9b1d987aa95cd 2010-11-05 Release 2.6.35.8-0]
** Rebased with stable/2.6.35.8 
** Fix libertas driver with SDIO IRQ
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=f22e641507e4e0c3fc015405bac7448f2c1d3034 2010-10-28 Release 2.6.35.7-1]
** Add support for SDIO IRQ
** Fix onenand bufferram management
** Improve IGEP0020 expansion board support
*** Add support for 4.3 inch and 7.0 inch display panels
*** Fix CAN probe oops
*[http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=commit;h=90ca5f215048ee612398610fab3981589da05633 2010-10-19 Release 2.6.35.7-0] 
**First release for 2.6.35 series

[[Category:Linux Kernel]]