powerpc: Partialy restore core of mpc8xx

CS Systemes d'Information (CSSI) manufactures 8xx boards for
critical communication systems. Those boards have been
running U-Boot since 2010 and will have to be maintained
until at least 2027.

commit 5b8e76c35ec312a3f73126bd1a2d2c0965b98a9f
("powerpc, 8xx: remove support for 8xx") orphaned those boards
by removing support for the mpc8xx CPU.

This commit partially restores support for the 8xx, with the
following limitations:
- Restores support for MPC866 and MPC885 only
- Does not restore IDE, PCMCIA, I2C, USB
- Does not restore examples
- Does not restore POST
- Does not restore Ethernet on SCC
- Does not restore console on SCC
- Does not restore bedbug and kgdb support

As the 866 and 885 do not support the following features,
they are not restored either:
- VIDEO / LCD
- RTC clock

The CPM uCODE patch is not restored either, because:
- 866 and 885 already have support for I2C and SPI relocation
without a uCODE patch
- relocation of SMC, I2C or SPI is only needed for using SCCs
for Ethernet or QMC

The dynamic setup/calculation of clocks is removed, we
expect the target being use with the clock and PLPRCR register
defined in the configuration.
All the clock settings for 8xx prior to 866 is removed as
well as we now only support 866 and 885.

This code is mature and addresses mature boards. Therefore
all code enclosed in '#if 0/#endif' and '#if XX_DEBUG/#endif'
is unneeded.

The following files are not restored by this patch:

- arch/powerpc/cpu/mpc8xx/bedbug_860.c
- arch/powerpc/cpu/mpc8xx/fec.h
- arch/powerpc/cpu/mpc8xx/kgdb.S
- arch/powerpc/cpu/mpc8xx/plprcr_write.S
- arch/powerpc/cpu/mpc8xx/scc.c
- arch/powerpc/cpu/mpc8xx/upatch.c
- arch/powerpc/cpu/mpc8xx/video.c
- arch/powerpc/include/asm/status_led.h
- arch/powerpc/lib/ide.c
- arch/powerpc/lib/ide.h
- doc/README.MPC866
- drivers/pcmcia/mpc8xx_pcmcia.c
- drivers/rtc/mpc8xx.c
- drivers/usb/gadget/mpc8xx_udc.c
- drivers/video/mpc8xx_lcd.c
- examples/standalone/test_burst.c
- examples/standalone/test_burst.h
- examples/standalone/test_burst_lib.S
- examples/standalone/timer.c
- include/mpc823_lcd.h
- include/usb/mpc8xx_udc.h
- post/cpu/mpc8xx/Makefile
- post/cpu/mpc8xx/cache.c
- post/cpu/mpc8xx/cache_8xx.S
- post/cpu/mpc8xx/ether.c
- post/cpu/mpc8xx/spr.c
- post/cpu/mpc8xx/uart.c
- post/cpu/mpc8xx/usb.c
- post/cpu/mpc8xx/watchdog.c

Some of the restored files are not located in a proper location.
In order to keep traceability of the changes, they will be
moved to their correct location and moved to Kconfig in a
followup patch.

This patch also declares CSSI as point of contact for the update
of the 8xx platform, as those boards are the only ones still
being maintained on the 8xx area. A later patch will add
those boards to the tree.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

1 files changed, 0 insertions, 14 deletions

diff --git a/include/mpc8xx.h b/include/mpc8xx.h
index 33a2cd8057..fc081ab756 100644
--- a/include/mpc8xx.h
+++ b/include/mpc8xx.h
@@ -145,20 +145,6 @@
 			  PLPRCR_MFI_MSK | \
 			  PLPRCR_PDF_MSK)
 
-/* Older chips (MPC860/862 et al) defines */
-#define PLPRCR_MF_MSK	0xFFF00000	/* Multiplication factor bits		*/
-#define PLPRCR_MF_SHIFT		20	/* Multiplication factor shift value	*/
-
-#define PLPRCR_SPLSS	0x00008000	/* SPLL Lock Status Sticky bit		*/
-#define PLPRCR_TMIST	0x00001000	/* Timers Interrupt Status		*/
-
-#define PLPRCR_LPM_MSK	0x00000300	/* Low Power Mode mask			*/
-#define PLPRCR_LPM_NORMAL 0x00000000	/* normal power management mode		*/
-#define PLPRCR_LPM_DOZE	  0x00000100	/* doze power management mode		*/
-#define PLPRCR_LPM_SLEEP  0x00000200	/* sleep power management mode		*/
-#define PLPRCR_LPM_DEEP_SLEEP 0x00000300 /* deep sleep power mgt mode		*/
-#define PLPRCR_LPM_DOWN	  0x00000300	/* down power management mode		*/
-
 /* Common defines */
 #define PLPRCR_TEXPS	0x00004000	/* TEXP Status				*/
 #define PLPRCR_CSRC	0x00000400	/* Clock Source				*/