Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC: r270885, r270948

- Nuke unused sdhci_softc.
- Static'ize sdhci_debug local to sdhci.c.
- Const'ify PCI device description strings.
- Nuke redundant resource ID members from sdhci_pci_softc.
- Nuke unused hw.sdhci_pci.debug tunable.
- Add support for using MSI instead of INTx, controllable via the tunable
hw.sdhci.enable_msi (defaulting to on) and tested with a RICOH R5CE823 SD
controller.
- Use NULL instead of 0 for pointers.

MFC r264096, r264097, r264099 r264100, r264101, r264102, r264119:

Fixes to the ti_sdhci and sdhci drivers (fix clock divisor calcs).

Use the ti_sdhci driver instead of ti_mmchs for Pandaboard.

MFC r261938, r261939, r261940, r261944, r261945, r261946, r261947, r261956, r261957, r261983, r261094,
r261955, r261958,

Add a driver to provide access to imx6 on-chip one-time-programmble data.

Make it possible to access the ocotp registers before the ocotp device
is attached, by establishing a temporary mapping of the registers when
necessary.

It turns out Freescale cleverly made the ocotp device compatible across
several different families of SoCs, so move it to the freescale directory
and prefix everything with fsl rather than imx6.

Convert the imx6 sdhci "R1B fix" from a busy-loop in the interrupt handler
to a callout.

Increase the wait time for acquiring the SD bus from 10 to 250ms.

If no compatible cards were found after probing the SD bus, say so.

Add timeout logic to sdhci, separate from the timeouts done by the hardware.

After a timeout, reset the controller using SDHCI_RESET_CMD|SDHCI_RESET_DATA
rather than SDHCI_RESET_ALL; the latter turns off clocks and power, removing
any possibility of recovering from the error.

Add a helper routine to depth-search the device tree for a node with a
matching 'compatible' property.

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Style changes and typos fixed.

Allow a hardware driver to pass clock frequencies into the sdhci driver.

The sdhci spec says that if the base or timeout clock frequency in the
capabilities register is zero, the driver must obtain the frequency "from
another source." This change defines that other source to be the low-level
hardware driver, which can pre-set the frequencies in slot.max_clk and
slot.timeout_clk before calling sdhci_init_slot().

This helps with a growing number of SoCs that have sdhci base clock
frequencies that either won't fit into the range allowed by the number of
bits available in the capabilities register, or the frequency is runtime-
configurable.

Add a new SDHCI_QUIRK_DONT_SHIFT_RESPONSE for hardware that pre-shifts
the response bits the way we do in software. While the hardware is just
doing the sensible thing rather than leaving it to the software, it's in
violation of the spec by doing so. Grrrr.

When the timeout clock is based on the SD clock, the timeout counter
has to be recalculated every time the SD clock frequency changes.

Also, tidy up the counter calculation... it makes no sense to calculate
a value one larger than the limit, then whine that it's too large and
truncate it to the limit. If the BROKEN_TIMEOUT quirk is set, don't
calculate the counter at all, just set it to the limit value.

Add hooks for plugging platform-provided transfer backend.

In order to use platorm backend hardware driver should
impement three methods:
- platform_start_transfer and platform_finish_transfer
to start and finish transfer
- platform_will_handle - check whether transaction is
suitable for backend. If not - driver will fall back
to PIO mode.

Submitted by: Daisuke Aoyama <aoyama at peach.ne.jp>
Approved by: ian@

Remove accidentally committed debug panic(9) call

Disable debug accidentally enabled by previous commit

Various timing-related fixes:

- Replace divisor numbers with more descirptive names
- Properly calculate minimum frequency for SDHCI 3.0
- Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock
- Add min_freq method to sdhci_if.m and provide default
implementation. By re-implementing this method hardware
drivers can control frequency controller operates when
executing initialization sequence

- Get proper maximum clock frequency for SDHCI v3.0 and higher

Add new quirks:
- Data timeout is broken
- Data timeout uses SD clock
- Capabilities register is unavailable

Add calculations for clock divisor for SDHCI 3.0

Split sdhci driver in two parts: sdhci and sdhci_pci.
sdchi encapsulates a generic SD Host Controller logic that relies on
actual hardware driver for register access.

sdhci_pci implements driver for PCI SDHC controllers using new SDHCI
interface

No kernel config modifications are required, but if you load sdhc
as a module you must switch to sdhci_pci instead.

Return back double spacing.

Fix typo in comment, should be MHz here.

Submitted by: Daan Vreeken <Daan vitsch.nl>

Add support for RICOH R5CE823 card reader, that can be found in
some Lenovo laptops.

The conroller needs a quirk to lower its frequency, and after
that it operates normally.

Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.

The SYSCTL_NODE macro defines a list that stores all child-elements of
that node. If there's no SYSCTL_DECL macro anywhere else, there's no
reason why it shouldn't be static.

Fix read_ivar implementation for MMC and SD.

1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression
'*(int *)result = val' to assign to result which is uintptr_t *.
This does not work on big-endian 64 bit systems.

2. The media_size ivar is declared as 'off_t' which does not fit
into uintptr_t in 32bit systems, change this to long.

Submitted by: kanthms at netlogicmicro com (initial version)

Force DMA for controller found in Lenovo T510 (probably in others too).
This makes reads 10 times faster.

Discussed with: mav

Add support for interruptless kernel dumping.

Fix read_ivar prototype.

Add hw.sdhci.debug sysctl to control debug level.

Cleanup msleep() arguments.
Move wakeup() out of the lock.

Forget current bus power settings on full reset. Chip must be reconfigured.

Do not issue command if there is no card, clock or power.
Controller will not detect command timeout without clock active.

Add controller suspend/resume support.

To be able to correctly suspend/resume with card inserted,
respective support should be also implemented at mmc and mmcsd layers.

Allow card reader bridge driver to report maximum supported transfer size.
sdhci supports up to 65535 blocks transfers, at91_mci - one block.

Enable multiblock operations disabled before to follow at91_mci driver
limitations.

Reviewed by: imp@

Import sdhci (PCI SD Host Controller) driver.
Driver supports PCI devices with class 8 and subclass 5 according to
SD Host Controller Specification.

Update NOTES, enable module and static build.
Enable related mmc and mmcsd modules build.

Discussed on: mobile@, current@