Commit graph

199 commits

Author SHA1 Message Date
Hans de Goede
929b2622eb sunxi: usbc: Remove unused irq field
We do not use irqs in u-boot so remove the unused irq field, and all the
 #ifdef-ery around the irq initialization.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-05-04 11:59:21 +02:00
Hans de Goede
92bcc6cb1e sunxi: Also set Auxiliary Ctl SMP bit in SPL
There is no reason not to and this make the #ifdef-ery easier to read.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-05-04 11:59:21 +02:00
Jan Kiszka
dcfa530f09 sun7i: Remove duplicate call to psci_arch_init
This is already invoked a few cycles later in monitor mode by
_secure_monitor (_sunxi_cpu_entry calls _do_nonsec_entry which triggers
_secure_monitor via smc #0). Drop it here, it serves no purpose.

CC: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Tested-by: Ian Campbell <ijc@hellion.org.uk>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-05-02 11:50:19 +02:00
Hans de Goede
a0e2b1b865 sunxi: usbc: Wait for vbus to fall after disabling it
When u-boot boots the board may be powering vbus, we turn off vbus in
sunxi_usbc_request_resources, if we are too quick with reading vusb-detect
after this we may see a residual charge and assume we've an external vusb
connected even though we do not. So when we see an external vusb wait a bit
and try again.

Without this when dealing with a pmic controller vbus and doing "reset" on
the u-boot console the musb host will only init once every other boot, because
the other boot it thinks an external vbus is present, this commit fixes this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-04-15 16:17:17 +02:00
Hans de Goede
046ea8b390 sunxi: usbc: Initialize vusb value on request_resources
On boards which use the pmic to enable/disable vbus on the otg port, the
vbus value is not reset to 0 on reset, as reset only resets the SoC and not
the pmic, so explicitly set vbus to 0 on init (request_resources) by moving
the gpio_direction_output call into request_resources.

For consistency also move the gpio_direction_input call for vbus-detect into
request_resources.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-04-15 16:17:17 +02:00
Paul Kocialkowski
487b3277d4 sunxi: GPIO pin mux hardware-feature-specific function index defines
Each hardware feature exposed through the GPIO pin mux is usually using the same
function index (for a given port), so there is no need to define one value per
pin: one value per hardware feature per port is sufficient, avoids duplication
and makes everything easier to understand.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-04-15 16:17:17 +02:00
Paul Kocialkowski
ebd468b2d2 sunxi: common VBUS detection logic in usbc
VBUS detection could be needed not only by the musb code (to prevent host mode),
but also by e.g. gadget drivers to start only when a cable is connected.

In addition, this allows more flexibility in vbus detection, as it could easily
be extended to other USBC indexes. Eventually, this would help making musb
support independent from a hardcoded USB controller index (0).

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-04-15 16:17:17 +02:00
Paul Kocialkowski
5eaacb4340 sunxi: usb: Drop AXP-sepcific VBUS detection and drive logic
VBUS detection and enable is now be used with virtual AXP GPIOs, so all the USB
code has to use GPIO in every case and let sunxi_gpio do the heavy lifting.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-04-15 16:17:17 +02:00
Iain Paton
e71b422bd7 sunxi: use CONFIG_SYS_CLK_FREQ to set cpu clock
make the CPU clock selectable via Kconfig

this removes the sunxi specific CONFIG_CLK_FULL_SPEED defined in each
soc header and replaces it's use in board/sunxi/board.c with
CONFIG_SYS_CLK_FREQ from Kconfig which allows us to configure board
specific frequency on boot

Signed-off-by: Iain Paton <ipaton0@gmail.com>
[hdegoede@redhat.com s/CONFIG_SYS_CLK_FREQ/CONFIG_TIMER_CLK_FREQ/ for the
 arch-timer clk speed on sun7i to fix mis-compile on sun7i]
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-03-29 13:36:03 +02:00
Iain Paton
7a140117ef sunxi: sun4i: improve cpu clock selection method
clock_set_pll1 would pick the next highest available cpu clock speed if
a value not in the pre defined table was selected. this potentially
results in overclocking the soc.

reverse the selection method so that we select the next lowest speed
and add the missing 912Mhz setting that's requested by sun7i which also
uses the sun4i clock code.

Signed-off-by: Iain Paton <ipaton0@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-03-29 13:08:39 +02:00
Hans de Goede
246e3b8787 sunxi: musb: Fix some lo speed devices not working with musb host
The usb0 / otg phy on sunxi boards has a bug where it wrongly detects a
high speed squelch on usb reset deassert when a lo speed device is plugged in.

The android kernel has a work around for this in the form of temporary
disabling the phy's squelch detection on reset deassert, this commit adds
the same workaround to the u-boot sunxi musb code, thereby fixing various usb
lo speed devices not working.

Tested with a (before non working) usb keyboard and a usb 2.4 GHz wireless
keyboard/mouse combo receiver.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-03-29 12:58:59 +02:00
Siarhei Siamashka
840fe95c3b sunxi: Support the FEL boot mode in the regular u-boot build
So that the CONFIG_SPL_FEL option is not needed anymore. And the regular
SPL binary, generated by the default u-boot build, is now also bootable
over USB in the FEL mode. The SPL still can boot from the SD card too.

A bunch of system registers need to be saved/restored in order to ensure
that the IRQ handler still works in the BROM FEL code after getting
control back from the SPL. This is done in the sunxi code instead of
abusing ifdefs in 'start.S'.

The decision whether to load the main u-boot binary from the SD card or
return to the FEL code in the BROM is done at runtime.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
[hdegoede@redhat.com: Since we now restore various regs before returning to
 the FEL BROM code we can drop the sunxi specific #ifdefs in start.S]
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-02-16 20:23:52 +01:00
Simon Glass
942cb0b6a2 sunxi: Normalise FEL support
Make sunxi's FEL code fit with the normal U-Boot boot sequence instead of
creating its own. There are some #ifdefs required in start.S. Future work
will hopefully remove these.

This series is available at u-boot-dm, branch sunxi-working.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-02-16 20:15:09 +01:00
Hans de Goede
51637afe98 sunxi: dram: Un-inline dram helper functions
Move the dram helper functions to a separate C file, rather then having them
as inline helpers in dram.h. This saves 144 bytes in the .text segment for
sun6i builds.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2015-02-16 20:05:52 +01:00
Hans de Goede
37d46dd3c4 sunxi: rsb: Move rsb_set_device_mode() call to rsb_init()
It turns out that the device_mode_data is rsb specific, rather then slave
specific, so integrate the rsb_set_device_mode() call into rsb_init().

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-02-02 13:55:14 +01:00
Hans de Goede
d35488c735 sunxi: rsb: Add sun9i (A80 support)
Add support for the A80 to the rsb code.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-02-02 13:55:14 +01:00
Hans de Goede
dacc0881ac sun9i: Add sun9i (A80) clock setup support
Add initial sun9i (A80) clock setup support, enough to get the uart + mmc
going.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-22 12:34:55 +01:00
Hans de Goede
22b618346a sunxi: Drop pll6 setting from clock_init_uart
As the comment says now that we have SPL support this is no longer necessary,
as PLL6 is already setup with the exact same parameters by the SPL.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-22 12:34:55 +01:00
Hans de Goede
b56f6e2b4e sunxi: Restore lowlevel_init usage
2 recent sunxi changes have removed the usage of lowlevel_init by moving some
code around and then setting CONFIG_SKIP_LOWLEVEL_INIT.
This is problematic for 2 reasons:

1) It does not just stop s_init from being called, it also stops
cpu_init_cp15 from getting called, which is undesirable.

2) We want u-boot.bin to be usable standalone, without SPL, some people e.g.
use an upstream u-boot.bin together with Allwinner's boot0 loader. So
u-boot.bin must (re)initialize the gpios, timer, etc.

This commit restores the lowlevel_init / s_init usage, while keeping the
changes to no longer use the global-data (gd) struct in the SPL.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-01-21 10:46:28 -05:00
Simon Glass
2b7c0f3081 sunxi: Drop use of lowlevel_init()
This does nothing now, so drop it. We have SPL anyway to do our low-level
init.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-16 14:52:53 -05:00
Simon Glass
f630974ccb sunxi: Move SPL s_init() code to board_init_f()
The current sunxi implementation uses gdata, which is going away. It also
sets up DRAM before board_init_f() in SPL.

There is really no reason to do much in s_init() since board_init_f() is
called immediately afterwards. The only change is that we need our own
implementation of board_init_f() which sets up DRAM before the BSS (which
is in DRAM) is cleared.

The s_init() code runs once for SPL and again for U-Boot proper. We
shouldn't need to init the clock/timer/gpio/i2c init twice, so just have it
in SPL.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-01-16 14:52:52 -05:00
Hans de Goede
a90e77dbeb sunxi: usbc: Add support for usb-vbus0 controller by axp drivebus pin
The axp221 / axp223's N_VBUSEN pin can be configured as an output rather
then an input, and this is used on some boards to control usb-vbus0, add
support for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:40 +01:00
Hans de Goede
4458b7a6e1 sunxi: usbc: Add support for usb0 to the common usbc code
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:40 +01:00
Hans de Goede
0eccec4ef1 sunxi: Move usb-controller init code out of ehci-sunxi.c for reuse for otg
Most of the usb-controller init code found in ehci-sunxi.c also is necessary
to init the otg usb controller, so move it to a common place.

While at it also update various #ifdefs / defines for sun8i support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:40 +01:00
Jan Kiszka
05c4bd3ec3 sun7i: Move psci_arch_init close to text_end
"adr rX, text_end" only works if the label is close. Adding further code
to the other functions will prevent this. So move the containing
function close to label. No functional change.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:40 +01:00
Jan Kiszka
602fa46c2c sun7i: Add support for taking CPUs offline via PSCI
Based on the original version by Marc Zyngier. It adds a psci_cpu_off
implementation for the A20 SoC. The mechanism works by first preparing
the calling CPU to go offline (disable and flush cache, disable SMP),
then requesting CPU 0 to pull the plug. The request is sent as FIQ on
SGI15.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:40 +01:00
Hans de Goede
25508ab26c sunxi: Fix PLL1 running at half speed on sun8i
PLL1 on sun6i / sun8i also has a p factor which divides the clock by
2^p (to the power p). On sun6i the p factor is ignored, but on sun8i it is
used and we were setting it to 1, resulting in the CPU running at 504 MHz
instead of 1008 MHz, this commit fixes this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:37 +01:00
Siarhei Siamashka
c3d2b963c6 sunxi: Fix buggy sun6i/sun8i DRAM size detection logic
After reboot, reset or even short power off, DRAM typically retains
the old stale data for some period of time (for this type of memory,
the bits of data are stored in slowly discharging capacitors).

The current sun6i/sun8i DRAM size detection logic, which is
inherited from the Allwinner code, relies on using a large magic
signature with the hope that it is unique enough and unlikely to
ever accidentally match this leftover garbage data in RAM. But
this approach is inherently unsafe, as can be demonstrated using
the following test program:

/***** A testcase for reproducing the problem ******/

void main(int argc, char *argv[])
{
    size_t size, i;
    uint32_t *buf;
    /* Allocate the buffer */
    if (argc < 2 || !(size = (size_t)atoi(argv[1]) * 1048576) ||
                    !(buf = malloc(size))) {
        printf("Need buffer size in MiB as a cmdline argument\n");
        exit(1);
    }
    /* Fill it with the Allwinner DRAM "magic" values */
    for (i = 0; i < size / 4; i++)
        buf[i] = 0xaa55aa55 + ((uintptr_t)&buf[i] / 4) % 64;
    /* Try to reboot */
    system("reboot");
    /* And wait */
    for (;;) {}
}
/***************************************************/

If this test program is run on the device (giving it a large
chunk of memory), then the DRAM size detection logic in u-boot
gets confused after reboot and fails to initialize DRAM properly.

A better approach is not to rely on luck and abstain from making
any assumptions about the properties of the leftover garbage
data in RAM. Instead just use a more reliable code for testing
whether two different addresses refer to the same memory location.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-01-14 14:56:37 +01:00
Hans de Goede
08fd1479c7 sun8i: Add dram initialization support
Based on the register / dram_para headers from the Allwinner u-boot / linux
sources + the init sequences from boot0.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:37 +01:00
Hans de Goede
5665f50e81 sunxi: Fill memory before comparing it when doing dram init on sun6i
The sun8i boot0 code fills the DRAM with a "random" pattern before comparing
it at different offsets to do columns, etc. detection. The sun6i boot0 code
does not do it, instead relying on the memory contents being random enough
to begin with for the memcmp to properly detect the wrap-around address, iow
it is working purely by chance. Since our sun6i dram code was modelled after
the boot0 code it contained the same issue.

This commit fixes this by filling the memory with a unique, distinct pattern.

The new mctl_mem_fill function this introduces is added as an inline helper
in dram.h, so that it can be shared with the sun8i dram code.

While at it move mctl_mem_matches to dram.h for re-use in sun8i too.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:37 +01:00
Hans de Goede
07f4fe7d7d sunxi: Move await_completion dram helper to dram.h
The await_completion helper is already copy pasted between the sun4i and sun6i
dram code, and we need it for sun8i too, so lets make it an inline helper in
dram.h, rather then adding yet another copy.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:37 +01:00
Hans de Goede
1aac47bd1b sun6i: clock_set_pll5: Calculate k and m rather then hardcoding them
Our old hardcoded k and m values are based on PLL5 being configured in steps
of 48 MHz, which is correct for sun6i where the DRAM PLL runs at twice the
DRAM CLK, which is usually configured in 24 MHz step. But on the A23 (sun8i)
the PLL5 runs at half the DRAM CLK, so we require 12 MHz steps.

This commit adjusts clock_set_pll5 to automatically select the best k and m
depending on the requested clk rate.

Suggested-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:37 +01:00
Hans de Goede
5af741f1e9 sun6i: Add a sigma_delta_enable paramter to clock_set_pll5()
The sun8i dram code sometimes wants to enable sigma delta mode,
add a parameter to allow this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:37 +01:00
Hans de Goede
bdcdf84631 sunxi: axp221: Add axp223 support
The axp223 appears to be the same as the axp221, except that it uses the
rsb to communicate rather then the p2wi. At least all the registers we use
are 100% the same.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:36 +01:00
Hans de Goede
66ebea06f7 sunxi: Add support for the rsb (Reduced Serial Bus)
sun8i (A23) introduces a new bus for communicating with the pmic, the rsb,
the rsb is also used to communicate with the pmic on the A80, and is
documented in the A80 user manual.

This commit adds support for this based on the rsb driver from the allwinner
u-boot sources.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:36 +01:00
Hans de Goede
ce881076fc sun6i: s/SUNXI_*P2WI*/SUN6I_*P2WI*/
The p2wi interface is only available on sun6i, adjust the gpio pinmux and
base address defines for it to reflect this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:36 +01:00
Jan Kiszka
3f6242eb30 sunxi: Align PSCI stack calculation to comment
0x400 is true 1K.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:36 +01:00
Hans de Goede
cac5b1cc0d sunxi: Add sunxi_get_sid helper function
On sun6i the SID is stored in the pmic, rather then in the SoC itself,
add a helper function to abstract this away.

This makes our MAC address generation code also work on sun6i.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:36 +01:00
Hans de Goede
7582e39eb0 sun6i: dram: Do not try to initialize a second dram chan on A31s
The A31s only has one dram channel, so do not bother with trying to initialize
a second channel.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:36 +01:00
Hans de Goede
10191ed098 sun6i: Add sunxi_get_ss_bonding_id() function
Add a sunxi_get_ss_bonding_id() function, and use it to differentiate between
the A31s and the A31.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:36 +01:00
Hans de Goede
37781a1a7e sun6i: Make dram clk and zq value Kconfig options
It turns out that there is a too large spread between boards to handle this
with a default value, turn this into Kconfig options, and set the values
the factory images are using for the Colombus and Mele_M9 boards.

Note this changes the ZQ default when not overriden through defconfig from
120 to 123, as that is what most boards seem to actually use.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2015-01-14 14:56:36 +01:00
Hans de Goede
7b02d9c943 sun6i: Drop some "unknown magic" from dram init
Allwinner tells us that this bit of code is the rtc ram being used to detect
coming out of "super-standby" mode, and if that is the case, going out of
self-refresh mode.

Since we do not support "super-standby" mode, this can be dropped.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-11-25 13:38:46 +01:00
Hans de Goede
0bd5125133 sunxi: Add video pll clock functions
This is a preparation patch for adding support for HDMI out.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-11-25 13:38:46 +01:00
Hans de Goede
9d4b7d0bc8 sun4i: Rename dram_clk_cfg to dram_clk_gate
The data sheet just calls it DRAM_CLK_REG, and on sun6i we've both a
dram_clk_cfg and dram_clk_gate, and the sun4i reg matches dram_clk_gate on
sun6i, so name it the same on sun4i.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-11-25 13:38:46 +01:00
Hans de Goede
6dbfda81c0 sun6i: Poke magic sram controller register to avoid cache issues
Without this the cache will only work in write-through mode, and as soon as
it is put in write-back mode things break.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-11-13 14:49:01 +01:00
Hans de Goede
9a07eb0ba0 sun6i: Add dram initialization code
Add full support for dram initialization, using a fixed clock and autodetection
of the memory organization (numbers of channels, bus-width, etc.).

This is based on dram_sun6i.c and dram.h from u-boot in the Allwinner A31 SDK,
extended with extra initialization sequences and the autodetect algorithm
from boot0.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-11-13 14:49:01 +01:00
Hans de Goede
bec72c7994 sun4i: Rename dram files to dram_sun4i.x
In preparation for adding sun6i dram support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-11-13 14:49:01 +01:00
Hans de Goede
9d8a533e3f sun6i: Add cpucfg register definitions
Not used atm, for future use (e.g. PSCI).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-11-13 14:49:01 +01:00
Hans de Goede
62c87ef2e9 sun6i: Add clock functions needed for SPL / DRAM init
Add clock_init_safe and clockset_pll5 functions, as these are needed for
SPL support resp. DRAM init (which is needed for SPL too).

Also add some extra clock register constant defines.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-11-13 14:49:01 +01:00
Oliver Schinagl
3b10e6eb68 sun6i: Add new p2wi controller driver
The A31 uses a new push-pull two wire interface, which features higher
transfer speeds (upto 6 MHz) in theory. While the hardware can burst 8
bytes each time, this driver will only see very little use and thus is
limited to single byte transmission only.

Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-11-13 14:49:01 +01:00
Simon Glass
bf38891af2 dm: sunxi: Add pinmux functions which take a bank parameter
With driver model we will have access to a bank pointer, so we want to
use it rather than converting back to a number, and then back to a
bank pointer. Add functions to provide this feature.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-11-05 13:09:58 +01:00
Ian Campbell
ed41e62f51 sunxi: Use CONFIG_MACH_SUN?I from Kconfig instead of CONFIG_SUN?I
Mostly automatic with:
    sed -i -e 's/CONFIG_\(SUN[45678]I\)/CONFIG_MACH_\1/g' $(git grep -l CONFIG_SUN[45678]I)
followed by removing the relevant #defines from include/configs/sun?i.h by
hand.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-11-05 13:09:58 +01:00
Hans de Goede
accc9e446b sunxi: Add CONFIG_OLD_SUNXI_KERNEL_COMPAT Kconfig option
Add a Kconfig option which users can select when they want to boot older
kernels, e.g. the linux-sunxi 3.4 kernels. For now this just forces the pll5
"p" value to 1 (divide by 2) as that is what those kernels are hardcoded too,
in the future this may enable further workarounds.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Tom Rini <trini@ti.com>
--
Changes in v2:
-s/CONFIG_OLD_KERNEL_COMPAT/CONFIG_OLD_SUNXI_KERNEL_COMPAT.
-Move the code block setting P(1) for old kernels to where P gets cleared
2014-10-24 09:37:26 +02:00
Hans de Goede
d0dbc28603 sunxi: dram: Use clock_get_pll5p to calculate mbus, rather then hardcoding
This is a preparation patch for making the pll5 "p" divisor configurable
through Kconfig.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:37:25 +02:00
Hans de Goede
9e54f6ee01 sunxi: Add clock_get_pll5p() function
This is a preparation patch for making the pll5 "p" divisor configurable
through Kconfig.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:37:24 +02:00
Chen-Yu Tsai
c757a50bd1 ARM: sunxi: Add support for using R_UART as console
The A23 only has UART0 muxed with MMC0. Some of the boards we
encountered expose R_UART as a set of pads.

Add support for R_UART so we can have a console while using mmc.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:35:39 +02:00
Chen-Yu Tsai
472ed0641e ARM: sunxi: Allow specifying module in prcm apb0 init function
The prcm apb0 controls multiple modules. Allow specifying which
modules to enable clocks and de-assert resets so the function
can be reused.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:35:39 +02:00
Chen-Yu Tsai
8ebe4f4292 ARM: sunxi: Add basic A23 support
The basic blocks of the A23 are similar to the A31 (sun6i). Re-use
sun6i code for initial clock, gpio, and uart setup.

There is no SPL support for A23, as we do not have any documentation
or sample code for DRAM initialization.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:35:39 +02:00
Chen-Yu Tsai
ff2b47f6a9 ARM: sunxi: Add support for uart0 on port F (mmc0)
Allwinner SoCs provide uart0 muxed with mmc0, which can then be used
with a micro SD breakout board. On the A23, this is the only way to
use uart0.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:35:38 +02:00
Chen-Yu Tsai
78c396a113 ARM: sunxi: Fix reset command on sun6i/sun8i
The watchdog on sun6i/sun8i has a different layout.

Add the new layout and fix up the setup functions so that reset works.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
[ ijc -- removed sun5i workaround from sun6i/sun8i codepath as discussed ]
2014-10-24 09:35:38 +02:00
Maxime Ripard
8a6564dacb ARM: sunxi: Add basic A31 support
Add a new sun6i machine that supports UART and MMC.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[wens@csie.org: use SPDX labels, adapt to Kconfig system, drop ifdef
		around mmc and smp code, drop MACH_TYPE]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:35:38 +02:00
Maxime Ripard
7711539734 ARM: sun6i: Setup the A31 UART0 muxing
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[wens@csie.org: commit message was "ARM: sunxi: Setup the A31 UART0 muxing"]
[wens@csie.org: reorder #ifs by SUN?I]
[wens@csie.org: replace magic numbers with GPIO definitions]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:35:38 +02:00
Chen-Yu Tsai
14177e47e8 ARM: sun6i: Add clock support
This patch adds the basic clocks support for the Allwinner A31 (sun6i)
processor. This code will not been compiled until the build is hooked
up in a later patch. It has been split out to keep the patches manageable.

This includes changes from the following commits from u-boot-sunxi:

a92051b ARM: sunxi: Add sun6i clock controller structure
1f72c6f ARM: sun6i: Setup the UART0 clocks
5f2e712 ARM: sunxi: Enable pll6 by default on all models
2be2f2a ARM: sunxi-mmc: Add mmc support for sun6i / A31
12e1633 ARM: sun6i: Add initial clock setup for SPL
1a9c9c6 ARM: sunxi: Split clock code into common, sun4i and sun6i code
0b194ee ARM: sun6i: Properly setup the PLL LDO in clock_init_safe
b54c626 sunxi: avoid sr32 for APB1 clock setup.
68fe29c sunxi: remove magic numbers from clock_get_pll{5,6}
c89867d sunxi: clocks: clock_get_pll5 prototype and coding style
501ab1e ARM: sunxi: Fix sun6i PLL6 settings
37f669b ARM: sunxi: Fix macro names for mmc and uart reset offsets
61de1e6 ARM: sunxi: Correct comment for MBUS1 register in sun6i clock definitions

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[wens@csie.org: styling fixes reported by checkpatch.pl]
[wens@csie.org: drop unsupported SPL code block and unused gpio.h header]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Cc: Tom Cubie <Mr.hipboi@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:35:37 +02:00
Oliver Schinagl
174deb768c ARM: sun6i: Add support for the power reset control module found on the A31
The A31 has a new module called PRCM, or Power, Reset Control Module.
This module controls clocks and resets for RTC block modules, and also
PLL biasing in the main clock module.

This patch adds the register definitions, and also enables the clocks
and resets for the RTC block PIO (pin controller) and P2WI (push-pull
2 wire interface) which is used to talk to the PMIC.

Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[wens@csie.org: spacing fixes reported by checkpatch.pl]
[wens@csie.org: Use setbits helper in PRCM init function]
[wens@csie.org: rephrase commit message to explain what the hardware
		supports and what we actually enable]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:35:37 +02:00
Chen-Yu Tsai
ea520947b1 ARM: sunxi: Use macro values for setting UART GPIO pull-ups
We have already defined macros for pull-up/down values in the
GPIO header. Use them instead of magic numbers when configuring
the UART pins.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-10-24 09:35:37 +02:00
Siarhei Siamashka
bf4ca384ad sunxi: dram: Autodetect DDR3 bus width and density
In the case if the 'dram_para' struct does not specify the exact bus
width or chip density, just use a trial and error method to find a
usable configuration.

Because all the major bugs in the DRAM initialization sequence are
now hopefully fixed, it should be safe to re-initialize the DRAM
controller multiple times until we get it configured right. The
original Allwinner's boot0 bootloader also used a similar
autodetection trick.

The DDR3 spec contains the package pinout and addressing table for
different possible chip densities. It appears to be impossible to
distinguish between a single chip with 16 I/O data lines and a pair
of chips with 8 I/O data lines in the case if they provide the same
storage capacity. Because a single 16-bit chip has a higher density
than a pair of equivalent 8-bit chips, it has stricter refresh timings.
So in the case of doubt, we assume that 16-bit chips are used.
Additionally, only Allwinner A20 has all A0-A15 address lines and
can support densities up to 8192. The older Allwinner A10 and
Allwinner A13 can only support densities up to 4096.

We deliberately leave out DDR2, dual-rank configurations and the
special case of a 8-bit chip with density 8192. None of these
configurations seem to have been ever used in real devices. And no
new devices are likely to use these exotic configurations (because
only up to 2GB of RAM can be populated in any case).

This DRAM autodetection feature potentially allows to have a single
low performance fail-safe DDR3 initialiazation for a universal single
bootloader binary, which can be compatible with all Allwinner
A10/A13/A20 based devices (if the ifdefs are replaced with a runtime
SoC type detection).

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:34 +02:00
Siarhei Siamashka
935758b1d5 sunxi: dram: Derive write recovery delay from DRAM clock speed
The write recovery time is 15ns for all JEDEC DDR3 speed bins. And
instead of hardcoding it to 10 cycles, it is possible to set tighter
timings based on accurate calculations. For example, DRAM clock
frequencies up to 533MHz need only 8 cycles for write recovery.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:33 +02:00
Siarhei Siamashka
b5c71f5f9c sunxi: dram: Drop DDR2 support and assume only single rank DDR3 memory
All the known Allwinner A10/A13/A20 devices are using just single rank
DDR3 memory. So don't pretend that we support DDR2 or more than one
rank, because nobody could ever test these configurations for real and
they are likely broken. Support for these features can be added back
in the case if such hardware actually exists.

As part of this code cleanup, also replace division by 1024 with
division by 1000 for the refresh timing calculations. This allows
to use the original non-skewed tRFC timing table from the DRR3 spec
and make code less confusing.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:33 +02:00
Siarhei Siamashka
d755a5fb20 sunxi: dram: Configurable DQS gating window mode and delay
The hardware DQS gate training is a bit unreliable and does not
always find the best delay settings.

So we introduce a 32-bit 'dqs_gating_delay' variable, where each
byte encodes the DQS gating delay for each byte lane. The delay
granularity is 1/4 cycle.

Also we allow to enable the active DQS gating window mode, which
works better than the passive mode in practice. The DDR3 spec
says that there is a 0.9 cycles preamble and 0.3 cycle postamble.
The DQS window has to be opened during preamble and closed during
postamble. In the passive window mode, the gating window is opened
and closed by just using the gating delay settings. And because
of the 1/4 cycle delay granularity, accurately hitting the 0.3
cycle long postamble is a bit tough. In the active window mode,
the gating window is auto-closing with the help of monitoring
the DQS line, which relaxes the gating delay accuracy requirements.

But the hardware DQS gate training is still performed in the passive
window mode. It is a more strict test, which is reducing the results
variance compared to the training with active window mode.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:33 +02:00
Siarhei Siamashka
e044daa33e sunxi: dram: Add a helper function 'mctl_get_number_of_lanes'
It is going to be useful in more than one place.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:33 +02:00
Siarhei Siamashka
b8f7cb6ae3 sunxi: dram: Improve DQS gate data training error handling
The stale error status should be cleared for all sun4i/sun5i/sun7i
hardware and not just for sun7i. Also there are two types of DQS
gate training errors ("found no result" and "found more than one
possible result"). Both are handled now.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:33 +02:00
Siarhei Siamashka
013f2d7469 sunxi: dram: Use divisor P=1 for PLL5
This configures the PLL5P clock frequency to something in the ballpark
of 1GHz and allows more choices for MBUS and G2D clock frequency
selection (using their own divisors). In particular, it enables the use
of 2/3 clock speed ratio between MBUS and DRAM.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:33 +02:00
Siarhei Siamashka
1a9717cbb3 sunxi: dram: Configurable MBUS clock speed (use PLL5 or PLL6)
The sun5i hardware (Allwinner A13) introduced configurable MBUS clock
speed. Allwinner A13 uses only 16-bit data bus width to connect the
external DRAM, which is halved compared to the 32-bit data bus of sun4i
(Allwinner A10), so it does not make much sense to clock a wider
internal bus at a very high speed. The Allwinner A13 manual specifies
300 MHz MBUS clock speed limit and 533 MHz DRAM clock speed limit. Newer
sun7i hardware (Allwinner A20) has a full width 32-bit external memory
interface again, but still keeps the MBUS clock speed configurable.
Clocking MBUS too low inhibits memory performance and one has to find
the optimal MBUS/DRAM clock speed ratio, which may depend on many
factors:
    http://linux-sunxi.org/A10_DRAM_Controller_Performance

This patch introduces a new 'mbus_clock' parameter for the 'dram_para'
struct and uses it as a desired MBUS clock speed target. If 'mbus_clock'
is not set, 300 MHz is used by default to match the older hardcoded
settings.

PLL5P and PLL6 are both evaluated as possible clock sources. Preferring
the one, which can provide higher clock frequency that is lower or
equal to the 'mbus_clock' target. In the case of a tie, PLL5P has
higher priority.

Attempting to set the MBUS clock speed has no effect on sun4i, but does
no harm either.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:33 +02:00
Siarhei Siamashka
5c18384dea sunxi: dram: Re-introduce the impedance calibration ond ODT
The DRAM controller allows to configure impedance either by using the
calibration against an external high precision 240 ohm resistor, or
by skipping the calibration and loading pre-defined data. The DRAM
controller register guide is available here:

    http://linux-sunxi.org/A10_DRAM_Controller_Register_Guide#SDR_ZQCR0

The new code supports both of the impedance configuration modes:
   - If the higher bits of the 'zq' parameter in the 'dram_para' struct
     are zero, then the lowest 8 bits are used as the ZPROG value, where
     two divisors encoded in lower and higher 4 bits. One divisor is
     used for calibrating the termination impedance, and another is used
     for the output impedance.
   - If bits 27:8 in the 'zq' parameters are non-zero, then they are
     used as the pre-defined ZDATA value instead of performing the ZQ
     calibration.

Two lowest bits in the 'odt_en' parameter enable ODT for the DQ and DQS
lines individually. Enabling ODT for both DQ and DQS means that the
'odt_en' parameter needs to be set to 3.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:33 +02:00
Siarhei Siamashka
94cd301988 sunxi: dram: Add 'await_bits_clear'/'await_bits_set' helper functions
The old 'await_completion' function is not sufficient, because
in some cases we want to wait for bits to be cleared, and in the
other cases we want to wait for bits to be set. So split the
'await_completion' into two new 'await_bits_clear' and
'await_bits_set' functions.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:33 +02:00
Siarhei Siamashka
cfc89b003b sunxi: dram: Do DDR3 reset in the same way on sun4i/sun5i/sun7i
The older differences were likely justified by the need to mitigate
the CKE delay timing violations on sun4i/sun5i. The CKE problem is
already resolved, so now we can use the sun7i variant of this code
everywhere.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:32 +02:00
Siarhei Siamashka
7e40e1926a sunxi: dram: Remove broken impedance and ODT configuration code
We can safely remove it, because none of the currently supported
boards uses these features.

The existing implementation had multiple problems:
   - unnecessary code duplication between sun4i/sun5i/sun7i
   - ZQ calibration was never initiated explicitly, and could be
     only triggered by setting the highest bit in the 'zq' parameter
     in the 'dram_para' struct (this was never actually done for
     any of the known Allwinner devices).
   - even if the ZQ calibration could be started, no attempts were
     made to wait for its completion, or checking whether the
     default automatically initiated ZQ calibration is still
     in progress
   - ODT was only ever enabled on sun4i, but not on sun5i/sun7i

Additionally, SDR_IOCR was set to 0x00cc0000 only on sun4i. There
are some hints in the Rockchip Linux kernel sources, indicating
that these bits are related to the automatic I/O power down
feature, which is poorly understood on sunxi hardware at the
moment. Avoiding to set these bits on sun4i too does not seem to
have any measurable/visible impact.

The impedance and ODT configuration code will be re-introdeced in
one of the next comits.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:32 +02:00
Siarhei Siamashka
f8e88b6837 sunxi: dram: Fix CKE delay handling for sun4i/sun5i
Before driving the CKE pin (Clock Enable) high, the DDR3 spec requires
to wait for additional 500 us after the RESET pin is de-asserted.

The DRAM controller takes care of this delay by itself, using a
configurable counter in the SDR_IDCR register. This works in the same
way on sun4i/sun5i/sun7i hardware (even the default register value
0x00c80064 is identical). Except that the counter is ticking a bit
slower on sun7i (3 DRAM clock cycles instead of 2), resulting in
longer actual delays for the same settings.

This patch configures the SDR_IDCR register for all sun4i/sun5i/sun7i
SoC variants and not just for sun7i alone. Also an explicit udelay(500)
is added immediately after DDR3 reset for extra safety. This is a
duplicated functionality. But since we don't have perfect documentation,
it may be reasonable to play safe. Half a millisecond boot time increase
is not that significant. Boot time can be always optimized later.
Preferebly by the people, who have the hardware equipment to check the
actual signals on the RESET and CKE lines and verify all the timings.

The old code did not configure the SDR_IDCR register for sun4i/sun5i,
but performed the DDR3 reset very early for sun4i/sun5i. This resulted
in a larger time gap between the DDR3 reset and the DDR3 initialization
steps and reduced the chances of CKE delay timing violation to cause
real troubles.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:32 +02:00
Siarhei Siamashka
e626d2d446 sunxi: dram: Respect the DDR3 reset timing requirements
The RESET pin needs to be kept low for at least 200 us according
to the DDR3 spec. So just do it the right way.

This issue did not cause any visible major problems earlier, because
the DRAM RESET pin is usually already low after the board reset. And
the time gap before reaching the sunxi u-boot DRAM initialization
code appeared to be sufficient.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:32 +02:00
Siarhei Siamashka
f257796773 sunxi: dram: Remove broken super-standby remnants
If the dram->ppwrsctl (SDR_DPCR) register has the lowest bit set to 1,
this means that DRAM is currently in self-refresh mode and retaining the
old data. Since we have no idea what to do in this situation yet, just
set this register to 0 and initialize DRAM in the same way as on any
normal reboot (discarding whatever was stored there).

This part of code was apparently used by the Allwinner boot0 bootloader
to handle resume from the so-called super-standby mode. But this
particular code got somehow mangled on the way from the boot0 bootloader
to the u-boot-sunxi bootloader and has no chance of doing anything even
remotely sane. For example:
1. in the original boot0 code we had "mctl_write_w(SDR_DPCR,
   0x16510000)" (write to the register) and in the u-boot it now looks
   like "setbits_le32(&dram->ppwrsctl, 0x16510000)" (set bits in the
   register)
2. in the original boot0 code it was issuing three commands "0x12, 0x17,
   0x13" (Self-Refresh entry, Self-Refresh exit, Refresh), but in the
   u-boot they have become "0x12, 0x12, 0x13" (Self-Refresh entry,
   Self-Refresh entry, Refresh)

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:32 +02:00
Siarhei Siamashka
34759d74a3 sunxi: dram: Remove useless 'dramc_scan_dll_para()' function
The attempt to do DRAM parameters calibration in 'dramc_scan_dll_para()'
function by trying different DLL adjustments and using the hardware
DQS gate training result as a feedback is a great source of inspiration,
but it just can't work properly the way it is implemented now. The fatal
problem of this implementation is that the DQS gating window can be
successfully found for almost every DLL delay adjustment setup that
gets tried. Thus making it unable to see any real difference between
'good' and 'bad' settings.

Also this code was supposed to be only activated by setting the highest
bit in the 'dram_tpr3' variable of the 'dram_para' struct (per-board
dram configuration). But none of the linux-sunxi devices has ever used
it for real. Basically, this code is just a dead weight.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-08-12 08:42:32 +02:00
Marc Zyngier
d5db7024aa sunxi: HYP/non-sec: add sun7i PSCI backend
So far, only supporting the CPU_ON method.
Other functions can be added later.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-07-31 15:37:24 +02:00
Hans de Goede
fc70300136 sunxi: Add CONFIG_MACPWR option
On some boards the ethernet-phy needs to be powered up through a gpio,
add support for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-07-31 15:37:23 +02:00
Ian Campbell
a6e50a88d8 ahci: provide sunxi SATA driver using AHCI platform framework
This enables the necessary clocks, in AHB0 and in PLL6_CFG. This is done
for sun7i only since I don't have access to any other sunxi platforms
with sata included.

The PHY setup is derived from the Alwinner releases and Linux, but is mostly
undocumented.

The Allwinner AHCI controller also requires some magic (and, again,
undocumented) DMA initialisation when starting a port.  This is added under a
suitable ifdef.

This option is enabled for Cubieboard, Cubieboard2 and Cubietruck based on
contents of Linux DTS files, including SATA power pin config taken from the
DTS. All build tested, but runtime tested on Cubieboard2 and Cubietruck only.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-07-31 15:37:22 +02:00
Ian Campbell
7c48b01510 sunxi: use setbits_le32 to enable the DMA clock
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: Hans de Goede <hdegoede@redhat.com>
2014-07-18 19:42:25 +01:00
Hans de Goede
ae5de5a19d sunxi: Fix reset hang on sun5i
Do the same as the Linux kernel does, this fixes the SoC hanging on reset
about 50% of the time.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-07-18 19:42:22 +01:00
Hans de Goede
6620377e4b sunxi: Add i2c support
Add support for the i2c controller found on all Allwinner sunxi SoCs,
this is the same controller as found on the Marvell orion5x and kirkwood
SoC families, with a slightly different register layout, so this patch uses
the existing mvtwsi code.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Acked-By: Prafulla Wadaskar <prafulla@marvell.com>
Acked-by: Heiko Schocher <hs@denx.de>
[ ijc -- updated u-boot-spl-fel.lds ]
2014-07-18 19:41:30 +01:00
Ian Campbell
799aff38df sunxi: Avoid unused variable warning.
Mark rc as __maybe_unused since it is infact unused on systems with neither
EMAC nor GMAC.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: Tom Rini <trini@ti.com>
2014-07-08 07:45:06 +01:00
Hans de Goede
c26fb9db0e sunxi: Add emac glue, enable emac on the cubieboard
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-07-06 20:12:45 +01:00
Hans de Goede
f84269c5c0 sunxi: Add sun5i support
Add support for the Allwinner A13 and A10s SoCs also know as the Allwinner
sun5i family, and the A13-OLinuXinoM A13 based and r7-tv-dongle A10s based
boards.

The only differences compared to the already supported sun4i and sun7i
families are all in the DRAM controller initialization:

-Different hcpr values
-Different MBUS settings
-Some other small initialization changes

Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net>
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-07-06 20:12:44 +01:00
Hans de Goede
745325a97d sunxi: Add sun4i support
Add support for the Allwinner A10 SoC also known as the Allwinner sun4i family,
and add the Cubieboard board which uses the A10 SoC.

Compared to sun7 only the DRAM controller is a bit different:
-Controller reset bits are inverted, but only for Rev. A
-Different hpcr values
-No MBUS on sun4i
-Various other initialization changes

Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net>
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-07-06 20:12:44 +01:00
Hans de Goede
c7e79dec85 sunxi: Implement reset_cpu
There is no way to reset the cpu, so use the watchdog for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-07-06 20:12:44 +01:00
Hans de Goede
9e5f80d823 sunxi: Fix u-boot-spl.lds to refer to .vectors
Adjust the u-boot-spl.lds linker script to match the changes made in the
41623c91b0 "arm: move exception handling out
of start.S files" commit.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
2014-07-06 17:41:13 +01:00
Ian Campbell
50827a5991 sunxi: non-FEL SPL boot support for sun7i
Add support for booting from an MMC card.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Henrik Nordström <henrik@henriknordstrom.net>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Marek Vasut <marex@denx.de>
Cc: Tom Cubie <Mr.hipboi@gmail.com>
Reviewed-by: Tom Rini <trini@ti.com>
2014-05-25 16:31:03 +02:00
Ian Campbell
5835823da3 sunxi: add gmac Ethernet support
Add support for the GMAC Ethernet controller on Allwinner A20 (sun7i)
processors. Enable for the Cubietruck.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Tom Rini <trini@ti.com>
2014-05-25 16:25:12 +02:00
Ian Campbell
cba69eeeaa sunxi: add sun7i cpu, board and start of day support
This patch adds generic board, start of day and basic build system support for
the Allwinner A20 (sun7i) processor. This code will not been compiled until the
build is hooked up in a later patch. It has been split out to keep the patches
manageable.

Signed-off-by: Adam Sampson <ats@offog.org>
Signed-off-by: Aleksei Mamlin <mamlinav@gmail.com>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net>
Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Signed-off-by: Luc Verhaegen <libv@skynet.be>
Signed-off-by: Luke Leighton <lkcl@lkcl.net>
Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Patrick Wood <patrickhwood@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Wills Wang <wills.wang.open@gmail.com>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Marek Vasut <marex@denx.de>
Cc: Tom Cubie <Mr.hipboi@gmail.com>
Reviewed-by: Tom Rini <trini@ti.com>
2014-05-25 16:12:40 +02:00
Ian Campbell
286c3c3a5e sunxi: add sun7i dram setup support
This patch adds DRAM initialisation support for the Allwinner A20 (sun7i)
processor. This code will not been compiled until the build is hooked up in a
later patch. It has been split out to keep the patches manageable.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net>
Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Signed-off-by: Luke Leighton <lkcl@lkcl.net>
Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Marek Vasut <marex@denx.de>
Cc: Tom Cubie <Mr.hipboi@gmail.com>
Reviewed-by: Tom Rini <trini@ti.com>
2014-05-25 16:12:30 +02:00
Ian Campbell
fe1b4db05e sunxi: add sun7i pinmux and gpio support
This patch adds the basic pinmux and gpio support for the Allwinner A20 (sun7i)
processor. This code will not been compiled until the build is hooked up in a
later patch. It has been split out to keep the patches manageable.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ma Haijun <mahaijuns@gmail.com>
Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Henrik Nordström <henrik@henriknordstrom.net>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Tom Rini <trini@ti.com>
Acked-by: Marek Vasut <marex@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Tom Cubie <Mr.hipboi@gmail.com>
Reviewed-by: Tom Rini <trini@ti.com>
2014-05-25 16:12:21 +02:00
Ian Campbell
643cf0ea02 sunxi: add sun7i clocks and timer support.
This patch adds the basic clocks and timer support for the Allwinner A20
(sun7i) processor. This code will not been compiled until the build is hooked
up in a later patch. It has been split out to keep the patches manageable.

Some of the code here is common to multiple sunxi subarchtectures, hence files
are named sun4i which is the earliest similar variant.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net>
Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Signed-off-by: Luke Leighton <lkcl@lkcl.net>
Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Cc: Stefan Roese <sr@denx.de>
Cc: Tom Cubie <Mr.hipboi@gmail.com>
Reviewed-by: Tom Rini <trini@ti.com>
2014-05-25 16:12:12 +02:00