Commit Graph

6 Commits

Author SHA1 Message Date
Marcel Moolenaar
23fbc06bfc Support lbc interrupts:
o   Save and clear the LTESR register in the interrupt handler.
o   In lbc_read_reg(), return the saved LTESR register value if applicable
    (i.e. when the saved value is not invalid (read: ~0U)).
o   In lbc_write_reg(), clear the bits in the saved register when when it's
    written to and when the asved value is not invalid.
o   Also in lbc_write_reg(), the LTESR register is unlocked (in H/W) when
    bit 1 of LTEATR is cleared. We use this to invalidate our saved LTESR
    register value. Subsequent reads and write go to H/W directly.

While here:
o   In lbc_read_reg() & lbc_write_reg(), add some belts and suspenders to
    catch when register offsets are out of range.
o   In lbc_attach(), initialize completely and don't leave something left
    for lbc_banks_enable().
2012-07-03 00:06:14 +00:00
Marcel Moolenaar
f6703dd295 A few improvements:
1.  Define all registers. These definitions are needed to support
    the FCM driver for direct-connect NAND.
2.  Repurpose lbc_read_reg() and lbc_write_reg() for use by localbus
    attached device drivers. Use bus_space functions directly in the
    lbc driver itself.
3.  Be smarter about programming LAWs and mapping memory. The ranges
    defined in the FDT are per bank (= chip select) and since we can
    have up to 8 banks, we could easily use more than 8 LAWs or TLB
    enrties when per-bank memory ranges need multiple LAWs or TLBs
    due to alignment or size constraints.
    We now combine all memory ranges into the fewest possible set of
    contiguous regions and program the hardware for that. Thus, a
    cleverly written FDT with 8 devices may still only need 1 LAW or
    1 TLB entry. Note that the memory ranges can be assigned randomly
    to the banks. We sort as we build to handle that.
4.  Support the FCM when programming the OR register. This is mostly
    for documention purposes as we do not have a way to define the
    mode for a bank.
5.  Remove Semihalf-ism: do not define DEBUG (only to undefine it
    again).
2012-05-24 21:23:13 +00:00
Rafal Jaworowski
d1d3233ebd Convert Freescale PowerPC platforms to FDT convention.
The following systems are affected:

  - MPC8555CDS
  - MPC8572DS

This overhaul covers the following major changes:

  - All integrated peripherals drivers for Freescale MPC85XX SoC, which are
    currently in the FreeBSD source tree are reworked and adjusted so they
    derive config data out of the device tree blob (instead of hard coded /
    tabelarized values).

  - This includes: LBC, PCI / PCI-Express, I2C, DS1553, OpenPIC, TSEC, SEC,
    QUICC, UART, CFI.

  - Thanks to the common FDT infrastrucutre (fdtbus, simplebus) we retire
    ocpbus(4) driver, which was based on hard-coded config data.

Note that world for these platforms has to be built WITH_FDT.

Reviewed by:	imp
Sponsored by:	The FreeBSD Foundation
2010-07-11 21:08:29 +00:00
Rafal Jaworowski
570255d8a5 Do not use OCP85XX_LBC_OFF twice when accessing LBC registers on MPC85XX.
It turns LBC control registers were not programmed correctly on MPC85XX. We
were accessing bogus addresses as the base offset (OCP85XX_LBC_OFF) was
erroneously added during offset calculations.  Effectively the state of LBC
control registers was not altered by the kernel initialization code, but
everything worked as long as we coincided to use the same settings (LBC decode
windows) as firmware has initialized.

Submitted by:	Lukasz Wojcik
Reviewed by:	marcel
Approved by:	re (kensmith)
Obtained from:	Semihalf
2009-07-21 08:38:45 +00:00
Rafal Jaworowski
25c22eb425 Extend and improve MPC85XX Local Bus management.
- Make LBC resources management self-contained: introduce explicit LBC
  resources definition (much like the OCP), provide dedicated rman for LB mem
  space.

- Full configuration of an LB chip select device: program LAW and BR/OR, map
  into KVA, handle all LB attributes (bus width, machine select, ecc,
  write protect etc).

- Factor out LAW manipulation routines into shared code, adjust OCP area
  accordingly.

- Other LBC fixes and clean-ups.

Obtained from:	Semihalf
2008-12-18 18:27:12 +00:00
Marcel Moolenaar
08077f589c Add a driver for the Local Bus Controller.
Obtained from:	Juniper Networks, Inc.
2008-10-25 06:03:40 +00:00