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C6X: devicetree support

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This is the basic devicetree support for C6X. Currently, four boards are
supported. Each one uses a different SoC part. Two of the four supported
SoCs are multicore. One with 3 cores and the other with 6 cores. There is
no coherency between the core-level caches, so SMP is not an option. It is
possible to run separate kernel instances on the various cores. There is
currently no C6X bootloader support for device trees so we build in the DTB
for now.

There are some interesting twists to the hardware which are of note for device
tree support. Each core has its own interrupt controller which is controlled
by special purpose core registers. This core controller provides 12 general
purpose prioritized interrupt sources. Each core is contained within a
hardware "module" which provides L1 and L2 caches, power control, and another
interrupt controller which cascades into the core interrupt controller. These
core module functions are controlled by memory mapped registers. The addresses
for these registers are the same for each core. That is, when coreN accesses
a module-level MMIO register at a given address, it accesses the register for
coreN even though other cores would use the same address to access the register
in the module containing those cores. Other hardware modules (timers, enet, etc)
which are memory mapped can be accessed by all cores.

The timers need some further explanation for multicore SoCs. Even though all
timer control registers are visible to all cores, interrupt routing or other
considerations may make a given timer more suitable for use by a core than
some other timer. Because of this and the desire to have the same image run
on more than one core, the timer nodes have a "ti,core-mask" property which
is used by the driver to scan for a suitable timer to use.

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Mark Salter 2011-10-04 12:12:20 -04:00
parent c1a144d77a
commit 041cadca70
17 changed files with 1087 additions and 0 deletions
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C6X PLL Clock Controllers
-------------------------
This is a first-cut support for the SoC clock controllers. This is still
under development and will probably change as the common device tree
clock support is added to the kernel.
Required properties:
- compatible: "ti,c64x+pll"
May also have SoC-specific value to support SoC-specific initialization
in the driver. One of:
"ti,c6455-pll"
"ti,c6457-pll"
"ti,c6472-pll"
"ti,c6474-pll"
- reg: base address and size of register area
- clock-frequency: input clock frequency in hz
Optional properties:
- ti,c64x+pll-bypass-delay: CPU cycles to delay when entering bypass mode
- ti,c64x+pll-reset-delay: CPU cycles to delay after PLL reset
- ti,c64x+pll-lock-delay: CPU cycles to delay after PLL frequency change
Example:
clock-controller@29a0000 {
compatible = "ti,c6472-pll", "ti,c64x+pll";
reg = <0x029a0000 0x200>;
clock-frequency = <25000000>;
ti,c64x+pll-bypass-delay = <200>;
ti,c64x+pll-reset-delay = <12000>;
ti,c64x+pll-lock-delay = <80000>;
};

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Device State Configuration Registers
------------------------------------
TI C6X SoCs contain a region of miscellaneous registers which provide various
function for SoC control or status. Details vary considerably among from SoC
to SoC with no two being alike.
In general, the Device State Configuraion Registers (DSCR) will provide one or
more configuration registers often protected by a lock register where one or
more key values must be written to a lock register in order to unlock the
configuration register for writes. These configuration register may be used to
enable (and disable in some cases) SoC pin drivers, select peripheral clock
sources (internal or pin), etc. In some cases, a configuration register is
write once or the individual bits are write once. In addition to device config,
the DSCR block may provide registers which which are used to reset peripherals,
provide device ID information, provide ethernet MAC addresses, as well as other
miscellaneous functions.
For device state control (enable/disable), each device control is assigned an
id which is used by individual device drivers to control the state as needed.
Required properties:
- compatible: must be "ti,c64x+dscr"
- reg: register area base and size
Optional properties:
NOTE: These are optional in that not all SoCs will have all properties. For
SoCs which do support a given property, leaving the property out of the
device tree will result in reduced functionality or possibly driver
failure.
- ti,dscr-devstat
offset of the devstat register
- ti,dscr-silicon-rev
offset, start bit, and bitsize of silicon revision field
- ti,dscr-rmii-resets
offset and bitmask of RMII reset field. May have multiple tuples if more
than one ethernet port is available.
- ti,dscr-locked-regs
possibly multiple tuples describing registers which are write protected by
a lock register. Each tuple consists of the register offset, lock register
offsset, and the key value used to unlock the register.
- ti,dscr-kick-regs
offset and key values of two "kick" registers used to write protect other
registers in DSCR. On SoCs using kick registers, the first key must be
written to the first kick register and the second key must be written to
the second register before other registers in the area are write-enabled.
- ti,dscr-mac-fuse-regs
MAC addresses are contained in two registers. Each element of a MAC address
is contained in a single byte. This property has two tuples. Each tuple has
a register offset and four cells representing bytes in the register from
most significant to least. The value of these four cells is the MAC byte
index (1-6) of the byte within the register. A value of 0 means the byte
is unused in the MAC address.
- ti,dscr-devstate-ctl-regs
This property describes the bitfields used to control the state of devices.
Each tuple describes a range of identical bitfields used to control one or
more devices (one bitfield per device). The layout of each tuple is:
start_id num_ids reg enable disable start_bit nbits
Where:
start_id is device id for the first device control in the range
num_ids is the number of device controls in the range
reg is the offset of the register holding the control bits
enable is the value to enable a device
disable is the value to disable a device (0xffffffff if cannot disable)
start_bit is the bit number of the first bit in the range
nbits is the number of bits per device control
- ti,dscr-devstate-stat-regs
This property describes the bitfields used to provide device state status
for device states controlled by the DSCR. Each tuple describes a range of
identical bitfields used to provide status for one or more devices (one
bitfield per device). The layout of each tuple is:
start_id num_ids reg enable disable start_bit nbits
Where:
start_id is device id for the first device status in the range
num_ids is the number of devices covered by the range
reg is the offset of the register holding the status bits
enable is the value indicating device is enabled
disable is the value indicating device is disabled
start_bit is the bit number of the first bit in the range
nbits is the number of bits per device status
- ti,dscr-privperm
Offset and default value for register used to set access privilege for
some SoC devices.
Example:
device-state-config-regs@2a80000 {
compatible = "ti,c64x+dscr";
reg = <0x02a80000 0x41000>;
ti,dscr-devstat = <0>;
ti,dscr-silicon-rev = <8 28 0xf>;
ti,dscr-rmii-resets = <0x40020 0x00040000>;
ti,dscr-locked-regs = <0x40008 0x40004 0x0f0a0b00>;
ti,dscr-devstate-ctl-regs =
<0 12 0x40008 1 0 0 2
12 1 0x40008 3 0 30 2
13 2 0x4002c 1 0xffffffff 0 1>;
ti,dscr-devstate-stat-regs =
<0 10 0x40014 1 0 0 3
10 2 0x40018 1 0 0 3>;
ti,dscr-mac-fuse-regs = <0x700 1 2 3 4
0x704 5 6 0 0>;
ti,dscr-privperm = <0x41c 0xaaaaaaaa>;
ti,dscr-kick-regs = <0x38 0x83E70B13
0x3c 0x95A4F1E0>;
};

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External Memory Interface
-------------------------
The emifa node describes a simple external bus controller found on some C6X
SoCs. This interface provides external busses with a number of chip selects.
Required properties:
- compatible: must be "ti,c64x+emifa", "simple-bus"
- reg: register area base and size
- #address-cells: must be 2 (chip-select + offset)
- #size-cells: must be 1
- ranges: mapping from EMIFA space to parent space
Optional properties:
- ti,dscr-dev-enable: Device ID if EMIF is enabled/disabled from DSCR
- ti,emifa-burst-priority:
Number of memory transfers after which the EMIF will elevate the priority
of the oldest command in the command FIFO. Setting this field to 255
disables this feature, thereby allowing old commands to stay in the FIFO
indefinitely.
- ti,emifa-ce-config:
Configuration values for each of the supported chip selects.
Example:
emifa@70000000 {
compatible = "ti,c64x+emifa", "simple-bus";
#address-cells = <2>;
#size-cells = <1>;
reg = <0x70000000 0x100>;
ranges = <0x2 0x0 0xa0000000 0x00000008
0x3 0x0 0xb0000000 0x00400000
0x4 0x0 0xc0000000 0x10000000
0x5 0x0 0xD0000000 0x10000000>;
ti,dscr-dev-enable = <13>;
ti,emifa-burst-priority = <255>;
ti,emifa-ce-config = <0x00240120
0x00240120
0x00240122
0x00240122>;
flash@3,0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "cfi-flash";
reg = <0x3 0x0 0x400000>;
bank-width = <1>;
device-width = <1>;
partition@0 {
reg = <0x0 0x400000>;
label = "NOR";
};
};
};
This shows a flash chip attached to chip select 3.

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C6X Interrupt Chips
-------------------
* C64X+ Core Interrupt Controller
The core interrupt controller provides 16 prioritized interrupts to the
C64X+ core. Priority 0 and 1 are used for reset and NMI respectively.
Priority 2 and 3 are reserved. Priority 4-15 are used for interrupt
sources coming from outside the core.
Required properties:
--------------------
- compatible: Should be "ti,c64x+core-pic";
- #interrupt-cells: <1>
Interrupt Specifier Definition
------------------------------
Single cell specifying the core interrupt priority level (4-15) where
4 is highest priority and 15 is lowest priority.
Example
-------
core_pic: interrupt-controller@0 {
interrupt-controller;
#interrupt-cells = <1>;
compatible = "ti,c64x+core-pic";
};
* C64x+ Megamodule Interrupt Controller
The megamodule PIC consists of four interrupt mupliplexers each of which
combine up to 32 interrupt inputs into a single interrupt output which
may be cascaded into the core interrupt controller. The megamodule PIC
has a total of 12 outputs cascading into the core interrupt controller.
One for each core interrupt priority level. In addition to the combined
interrupt sources, individual megamodule interrupts may be cascaded to
the core interrupt controller. When an individual interrupt is cascaded,
it is no longer handled through a megamodule interrupt combiner and is
considered to have the core interrupt controller as the parent.
Required properties:
--------------------
- compatible: "ti,c64x+megamod-pic"
- interrupt-controller
- #interrupt-cells: <1>
- reg: base address and size of register area
- interrupt-parent: must be core interrupt controller
- interrupts: This should have four cells; one for each interrupt combiner.
The cells contain the core priority interrupt to which the
corresponding combiner output is wired.
Optional properties:
--------------------
- ti,c64x+megamod-pic-mux: Array of 12 cells correspnding to the 12 core
priority interrupts. The first cell corresponds to
core priority 4 and the last cell corresponds to
core priority 15. The value of each cell is the
megamodule interrupt source which is MUXed to
the core interrupt corresponding to the cell
position. Allowed values are 4 - 127. Mapping for
interrupts 0 - 3 (combined interrupt sources) are
ignored.
Interrupt Specifier Definition
------------------------------
Single cell specifying the megamodule interrupt source (4-127). Note that
interrupts mapped directly to the core with "ti,c64x+megamod-pic-mux" will
use the core interrupt controller as their parent and the specifier will
be the core priority level, not the megamodule interrupt number.
Examples
--------
megamod_pic: interrupt-controller@1800000 {
compatible = "ti,c64x+megamod-pic";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0x1800000 0x1000>;
interrupt-parent = <&core_pic>;
interrupts = < 12 13 14 15 >;
};
This is a minimal example where all individual interrupts go through a
combiner. Combiner-0 is mapped to core interrupt 12, combiner-1 is mapped
to interrupt 13, etc.
megamod_pic: interrupt-controller@1800000 {
compatible = "ti,c64x+megamod-pic";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0x1800000 0x1000>;
interrupt-parent = <&core_pic>;
interrupts = < 12 13 14 15 >;
ti,c64x+megamod-pic-mux = < 0 0 0 0
32 0 0 0
0 0 0 0 >;
};
This the same as the first example except that megamodule interrupt 32 is
mapped directly to core priority interrupt 8. The node using this interrupt
must set the core controller as its interrupt parent and use 8 in the
interrupt specifier value.

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C6X System-on-Chip
------------------
Required properties:
- compatible: "simple-bus"
- #address-cells: must be 1
- #size-cells: must be 1
- ranges
Optional properties:
- model: specific SoC model
- nodes for IP blocks within SoC
Example:
soc {
compatible = "simple-bus";
model = "tms320c6455";
#address-cells = <1>;
#size-cells = <1>;
ranges;
...
};

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Timer64
-------
The timer64 node describes C6X event timers.
Required properties:
- compatible: must be "ti,c64x+timer64"
- reg: base address and size of register region
- interrupt-parent: interrupt controller
- interrupts: interrupt id
Optional properties:
- ti,dscr-dev-enable: Device ID used to enable timer IP through DSCR interface.
- ti,core-mask: on multi-core SoCs, bitmask of cores allowed to use this timer.
Example:
timer0: timer@25e0000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x01 >;
reg = <0x25e0000 0x40>;
interrupt-parent = <&megamod_pic>;
interrupts = < 16 >;
};

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/*
* arch/c6x/boot/dts/dsk6455.dts
*
* DSK6455 Evaluation Platform For TMS320C6455
* Copyright (C) 2011 Texas Instruments Incorporated
*
* Author: Mark Salter <msalter@redhat.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
*/
/dts-v1/;
/include/ "tms320c6455.dtsi"
/ {
model = "Spectrum Digital DSK6455";
compatible = "spectrum-digital,dsk6455";
chosen {
bootargs = "root=/dev/nfs ip=dhcp rw";
};
memory {
device_type = "memory";
reg = <0xE0000000 0x08000000>;
};
soc {
megamod_pic: interrupt-controller@1800000 {
interrupts = < 12 13 14 15 >;
};
emifa@70000000 {
flash@3,0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "cfi-flash";
reg = <0x3 0x0 0x400000>;
bank-width = <1>;
device-width = <1>;
partition@0 {
reg = <0x0 0x400000>;
label = "NOR";
};
};
};
timer1: timer@2980000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 69 >;
};
clock-controller@029a0000 {
clock-frequency = <50000000>;
};
};
};

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/*
* arch/c6x/boot/dts/evmc6457.dts
*
* EVMC6457 Evaluation Platform For TMS320C6457
*
* Copyright (C) 2011 Texas Instruments Incorporated
*
* Author: Mark Salter <msalter@redhat.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
*/
/dts-v1/;
/include/ "tms320c6457.dtsi"
/ {
model = "eInfochips EVMC6457";
compatible = "einfochips,evmc6457";
chosen {
bootargs = "console=hvc root=/dev/nfs ip=dhcp rw";
};
memory {
device_type = "memory";
reg = <0xE0000000 0x10000000>;
};
soc {
megamod_pic: interrupt-controller@1800000 {
interrupts = < 12 13 14 15 >;
};
timer0: timer@2940000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 67 >;
};
clock-controller@29a0000 {
clock-frequency = <60000000>;
};
};
};

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/*
* arch/c6x/boot/dts/evmc6472.dts
*
* EVMC6472 Evaluation Platform For TMS320C6472
*
* Copyright (C) 2011 Texas Instruments Incorporated
*
* Author: Mark Salter <msalter@redhat.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
*/
/dts-v1/;
/include/ "tms320c6472.dtsi"
/ {
model = "eInfochips EVMC6472";
compatible = "einfochips,evmc6472";
chosen {
bootargs = "console=hvc root=/dev/nfs ip=dhcp rw";
};
memory {
device_type = "memory";
reg = <0xE0000000 0x10000000>;
};
soc {
megamod_pic: interrupt-controller@1800000 {
interrupts = < 12 13 14 15 >;
};
timer0: timer@25e0000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 16 >;
};
timer1: timer@25f0000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 16 >;
};
timer2: timer@2600000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 16 >;
};
timer3: timer@2610000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 16 >;
};
timer4: timer@2620000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 16 >;
};
timer5: timer@2630000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 16 >;
};
clock-controller@29a0000 {
clock-frequency = <25000000>;
};
};
};

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/*
* arch/c6x/boot/dts/evmc6474.dts
*
* EVMC6474 Evaluation Platform For TMS320C6474
*
* Copyright (C) 2011 Texas Instruments Incorporated
*
* Author: Mark Salter <msalter@redhat.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
*/
/dts-v1/;
/include/ "tms320c6474.dtsi"
/ {
model = "Spectrum Digital EVMC6474";
compatible = "spectrum-digital,evmc6474";
chosen {
bootargs = "console=hvc root=/dev/nfs ip=dhcp rw";
};
memory {
device_type = "memory";
reg = <0x80000000 0x08000000>;
};
soc {
megamod_pic: interrupt-controller@1800000 {
interrupts = < 12 13 14 15 >;
};
timer3: timer@2940000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 39 >;
};
timer4: timer@2950000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 41 >;
};
timer5: timer@2960000 {
interrupt-parent = <&megamod_pic>;
interrupts = < 43 >;
};
clock-controller@29a0000 {
clock-frequency = <50000000>;
};
};
};

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/ {
#address-cells = <1>;
#size-cells = <1>;
cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu@0 {
device_type = "cpu";
model = "ti,c64x+";
reg = <0>;
};
};
soc {
compatible = "simple-bus";
model = "tms320c6455";
#address-cells = <1>;
#size-cells = <1>;
ranges;
core_pic: interrupt-controller {
interrupt-controller;
#interrupt-cells = <1>;
compatible = "ti,c64x+core-pic";
};
/*
* Megamodule interrupt controller
*/
megamod_pic: interrupt-controller@1800000 {
compatible = "ti,c64x+megamod-pic";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0x1800000 0x1000>;
interrupt-parent = <&core_pic>;
};
cache-controller@1840000 {
compatible = "ti,c64x+cache";
reg = <0x01840000 0x8400>;
};
emifa@70000000 {
compatible = "ti,c64x+emifa", "simple-bus";
#address-cells = <2>;
#size-cells = <1>;
reg = <0x70000000 0x100>;
ranges = <0x2 0x0 0xa0000000 0x00000008
0x3 0x0 0xb0000000 0x00400000
0x4 0x0 0xc0000000 0x10000000
0x5 0x0 0xD0000000 0x10000000>;
ti,dscr-dev-enable = <13>;
ti,emifa-burst-priority = <255>;
ti,emifa-ce-config = <0x00240120
0x00240120
0x00240122
0x00240122>;
};
timer1: timer@2980000 {
compatible = "ti,c64x+timer64";
reg = <0x2980000 0x40>;
ti,dscr-dev-enable = <4>;
};
clock-controller@029a0000 {
compatible = "ti,c6455-pll", "ti,c64x+pll";
reg = <0x029a0000 0x200>;
ti,c64x+pll-bypass-delay = <1440>;
ti,c64x+pll-reset-delay = <15360>;
ti,c64x+pll-lock-delay = <24000>;
};
device-state-config-regs@2a80000 {
compatible = "ti,c64x+dscr";
reg = <0x02a80000 0x41000>;
ti,dscr-devstat = <0>;
ti,dscr-silicon-rev = <8 28 0xf>;
ti,dscr-rmii-resets = <0 0x40020 0x00040000>;
ti,dscr-locked-regs = <0x40008 0x40004 0x0f0a0b00>;
ti,dscr-devstate-ctl-regs =
<0 12 0x40008 1 0 0 2
12 1 0x40008 3 0 30 2
13 2 0x4002c 1 0xffffffff 0 1>;
ti,dscr-devstate-stat-regs =
<0 10 0x40014 1 0 0 3
10 2 0x40018 1 0 0 3>;
};
};
};

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/ {
#address-cells = <1>;
#size-cells = <1>;
cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu@0 {
device_type = "cpu";
model = "ti,c64x+";
reg = <0>;
};
};
soc {
compatible = "simple-bus";
model = "tms320c6457";
#address-cells = <1>;
#size-cells = <1>;
ranges;
core_pic: interrupt-controller {
interrupt-controller;
#interrupt-cells = <1>;
compatible = "ti,c64x+core-pic";
};
megamod_pic: interrupt-controller@1800000 {
compatible = "ti,c64x+megamod-pic";
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&core_pic>;
reg = <0x1800000 0x1000>;
};
cache-controller@1840000 {
compatible = "ti,c64x+cache";
reg = <0x01840000 0x8400>;
};
device-state-controller@2880800 {
compatible = "ti,c64x+dscr";
reg = <0x02880800 0x400>;
ti,dscr-devstat = <0x20>;
ti,dscr-silicon-rev = <0x18 28 0xf>;
ti,dscr-mac-fuse-regs = <0x114 3 4 5 6
0x118 0 0 1 2>;
ti,dscr-kick-regs = <0x38 0x83E70B13
0x3c 0x95A4F1E0>;
};
timer0: timer@2940000 {
compatible = "ti,c64x+timer64";
reg = <0x2940000 0x40>;
};
clock-controller@29a0000 {
compatible = "ti,c6457-pll", "ti,c64x+pll";
reg = <0x029a0000 0x200>;
ti,c64x+pll-bypass-delay = <300>;
ti,c64x+pll-reset-delay = <24000>;
ti,c64x+pll-lock-delay = <50000>;
};
};
};

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/ {
#address-cells = <1>;
#size-cells = <1>;
cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu@0 {
device_type = "cpu";
reg = <0>;
model = "ti,c64x+";
};
cpu@1 {
device_type = "cpu";
reg = <1>;
model = "ti,c64x+";
};
cpu@2 {
device_type = "cpu";
reg = <2>;
model = "ti,c64x+";
};
cpu@3 {
device_type = "cpu";
reg = <3>;
model = "ti,c64x+";
};
cpu@4 {
device_type = "cpu";
reg = <4>;
model = "ti,c64x+";
};
cpu@5 {
device_type = "cpu";
reg = <5>;
model = "ti,c64x+";
};
};
soc {
compatible = "simple-bus";
model = "tms320c6472";
#address-cells = <1>;
#size-cells = <1>;
ranges;
core_pic: interrupt-controller {
compatible = "ti,c64x+core-pic";
interrupt-controller;
#interrupt-cells = <1>;
};
megamod_pic: interrupt-controller@1800000 {
compatible = "ti,c64x+megamod-pic";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0x1800000 0x1000>;
interrupt-parent = <&core_pic>;
};
cache-controller@1840000 {
compatible = "ti,c64x+cache";
reg = <0x01840000 0x8400>;
};
timer0: timer@25e0000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x01 >;
reg = <0x25e0000 0x40>;
};
timer1: timer@25f0000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x02 >;
reg = <0x25f0000 0x40>;
};
timer2: timer@2600000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x04 >;
reg = <0x2600000 0x40>;
};
timer3: timer@2610000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x08 >;
reg = <0x2610000 0x40>;
};
timer4: timer@2620000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x10 >;
reg = <0x2620000 0x40>;
};
timer5: timer@2630000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x20 >;
reg = <0x2630000 0x40>;
};
clock-controller@29a0000 {
compatible = "ti,c6472-pll", "ti,c64x+pll";
reg = <0x029a0000 0x200>;
ti,c64x+pll-bypass-delay = <200>;
ti,c64x+pll-reset-delay = <12000>;
ti,c64x+pll-lock-delay = <80000>;
};
device-state-controller@2a80000 {
compatible = "ti,c64x+dscr";
reg = <0x02a80000 0x1000>;
ti,dscr-devstat = <0>;
ti,dscr-silicon-rev = <0x70c 16 0xff>;
ti,dscr-mac-fuse-regs = <0x700 1 2 3 4
0x704 5 6 0 0>;
ti,dscr-rmii-resets = <0x208 1
0x20c 1>;
ti,dscr-locked-regs = <0x200 0x204 0x0a1e183a
0x40c 0x420 0xbea7
0x41c 0x420 0xbea7>;
ti,dscr-privperm = <0x41c 0xaaaaaaaa>;
ti,dscr-devstate-ctl-regs = <0 13 0x200 1 0 0 1>;
};
};
};

89
arch/c6x/boot/dts/tms320c6474.dtsi Normal file
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/ {
#address-cells = <1>;
#size-cells = <1>;
cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu@0 {
device_type = "cpu";
reg = <0>;
model = "ti,c64x+";
};
cpu@1 {
device_type = "cpu";
reg = <1>;
model = "ti,c64x+";
};
cpu@2 {
device_type = "cpu";
reg = <2>;
model = "ti,c64x+";
};
};
soc {
compatible = "simple-bus";
model = "tms320c6474";
#address-cells = <1>;
#size-cells = <1>;
ranges;
core_pic: interrupt-controller {
interrupt-controller;
#interrupt-cells = <1>;
compatible = "ti,c64x+core-pic";
};
megamod_pic: interrupt-controller@1800000 {
compatible = "ti,c64x+megamod-pic";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0x1800000 0x1000>;
interrupt-parent = <&core_pic>;
};
cache-controller@1840000 {
compatible = "ti,c64x+cache";
reg = <0x01840000 0x8400>;
};
timer3: timer@2940000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x04 >;
reg = <0x2940000 0x40>;
};
timer4: timer@2950000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x02 >;
reg = <0x2950000 0x40>;
};
timer5: timer@2960000 {
compatible = "ti,c64x+timer64";
ti,core-mask = < 0x01 >;
reg = <0x2960000 0x40>;
};
device-state-controller@2880800 {
compatible = "ti,c64x+dscr";
reg = <0x02880800 0x400>;
ti,dscr-devstat = <0x004>;
ti,dscr-silicon-rev = <0x014 28 0xf>;
ti,dscr-mac-fuse-regs = <0x34 3 4 5 6
0x38 0 0 1 2>;
};
clock-controller@29a0000 {
compatible = "ti,c6474-pll", "ti,c64x+pll";
reg = <0x029a0000 0x200>;
ti,c64x+pll-bypass-delay = <120>;
ti,c64x+pll-reset-delay = <30000>;
ti,c64x+pll-lock-delay = <60000>;
};
};
};

2
arch/c6x/boot/linked_dtb.S Normal file
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.section __fdt_blob,"a"
.incbin "arch/c6x/boot/builtin.dtb"

53
arch/c6x/kernel/devicetree.c Normal file
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/*
* Architecture specific OF callbacks.
*
* Copyright (C) 2011 Texas Instruments Incorporated
* Author: Mark Salter <msalter@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/initrd.h>
#include <linux/memblock.h>
void __init early_init_devtree(void *params)
{
/* Setup flat device-tree pointer */
initial_boot_params = params;
/* Retrieve various informations from the /chosen node of the
* device-tree, including the platform type, initrd location and
* size and more ...
*/
of_scan_flat_dt(early_init_dt_scan_chosen, c6x_command_line);
/* Scan memory nodes and rebuild MEMBLOCKs */
of_scan_flat_dt(early_init_dt_scan_root, NULL);
of_scan_flat_dt(early_init_dt_scan_memory, NULL);
}
#ifdef CONFIG_BLK_DEV_INITRD
void __init early_init_dt_setup_initrd_arch(unsigned long start,
unsigned long end)
{
initrd_start = (unsigned long)__va(start);
initrd_end = (unsigned long)__va(end);
initrd_below_start_ok = 1;
}
#endif
void __init early_init_dt_add_memory_arch(u64 base, u64 size)
{
c6x_add_memory(base, size);
}
void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
{
return __va(memblock_alloc(size, align));
}

17
arch/c6x/platforms/platform.c Normal file
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/*
* Copyright 2011 Texas Instruments Incorporated
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/init.h>
#include <linux/of_platform.h>
static int __init c6x_device_probe(void)
{
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
return 0;
}
core_initcall(c6x_device_probe);