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![Simon Glass](/assets/img/avatar_default.png)
Sandbox pci works using emulation drivers which are currently children of
the pci device:
pci-controller {
pci@1f,0 {
compatible = "pci-generic";
reg = <0xf800 0 0 0 0>;
emul@1f,0 {
compatible = "sandbox,swap-case";
};
};
};
In this case the emulation device is attached to pci device on address
f800 (device 1f, function 0) and provides the swap-case functionality.
However this is not ideal, since every device on a PCI bus has a child
device. This is only really the case for sandbox, but we want to avoid
special-case code for sandbox.
Worse, child devices cannot be probed before their parents. This forces
us to use 'find' rather than 'get' to obtain the emulator device. In fact
the emulator devices are never probed. There is code in
sandbox_pci_emul_post_probe() which tries to track when emulators are
active, but at present this does not work.
A better approach seems to be to add a separate node elsewhere in the
device tree, an 'emulation parent'. This could be given a bogus address
(such as -1) to hide the emulators away from the 'pci' command, but it
seems better to keep it at the root node to avoid such hacks.
Then we can use a phandle to point from the device to the correct
emulator, and only on sandbox. The code to find an emulator does not
interfere with normal pci operation.
Add a new UCLASS_PCI_EMUL_PARENT uclass which allows finding an emulator
given a bus, and finding a bus given an emulator. Update the existing
device trees and the code for finding an emulator.
This brings PCI emulators more into line with I2C.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: fix 3 typos in the commit message;
encode bus number in the labels of swap_case_emul nodes;
mention commit 4345998ae9
in sandbox_pci_get_emul()]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
370 lines
6.2 KiB
Plaintext
370 lines
6.2 KiB
Plaintext
/*
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* This is the common sandbox device-tree nodes. This is shared between sandbox
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* and sandbox64 builds.
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*/
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#define USB_CLASS_HUB 9
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/ {
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chosen {
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stdout-path = "/serial";
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};
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audio: audio-codec {
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compatible = "sandbox,audio-codec";
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#sound-dai-cells = <1>;
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};
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gpio_a: gpios@0 {
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u-boot,dm-pre-reloc;
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gpio-controller;
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compatible = "sandbox,gpio";
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#gpio-cells = <1>;
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gpio-bank-name = "a";
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sandbox,gpio-count = <20>;
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};
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gpio_b: gpios@1 {
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u-boot,dm-pre-reloc;
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gpio-controller;
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compatible = "sandbox,gpio";
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#gpio-cells = <2>;
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gpio-bank-name = "b";
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sandbox,gpio-count = <10>;
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};
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hexagon {
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compatible = "demo-simple";
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colour = "white";
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sides = <6>;
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};
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i2c_0: i2c@0 {
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eeprom@2c {
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reg = <0x2c>;
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compatible = "i2c-eeprom";
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sandbox,emul = <&emul_eeprom>;
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};
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rtc_0: rtc@43 {
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reg = <0x43>;
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compatible = "sandbox-rtc";
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sandbox,emul = <&emul0>;
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};
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sandbox_pmic: sandbox_pmic {
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reg = <0x40>;
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};
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mc34708: pmic@41 {
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reg = <0x41>;
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};
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i2c_emul: emul {
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reg = <0xff>;
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compatible = "sandbox,i2c-emul-parent";
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emul_eeprom: emul-eeprom {
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compatible = "sandbox,i2c-eeprom";
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sandbox,filename = "i2c.bin";
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sandbox,size = <256>;
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};
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emul0: emul0 {
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compatible = "sandbox,i2c-rtc";
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};
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};
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};
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i2s: i2s {
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compatible = "sandbox,i2s";
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#sound-dai-cells = <1>;
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};
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lcd {
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u-boot,dm-pre-reloc;
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compatible = "sandbox,lcd-sdl";
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xres = <1366>;
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yres = <768>;
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};
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leds {
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compatible = "gpio-leds";
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iracibble {
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gpios = <&gpio_a 1 0>;
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label = "sandbox:red";
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};
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martinet {
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gpios = <&gpio_a 2 0>;
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label = "sandbox:green";
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};
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};
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pci-controller {
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pci@1f,0 {
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compatible = "pci-generic";
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reg = <0xf800 0 0 0 0>;
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sandbox,emul = <&swap_case_emul>;
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};
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};
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emul {
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compatible = "sandbox,pci-emul-parent";
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swap_case_emul: emul@1f,0 {
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compatible = "sandbox,swap-case";
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};
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};
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pinctrl {
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compatible = "sandbox,pinctrl";
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status = "okay";
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pinctrl_i2c0: i2c0 {
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groups = "i2c";
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function = "i2c";
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bias-pull-up;
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};
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pinctrl_serial0: uart0 {
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groups = "serial_a";
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function = "serial";
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};
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pinctrl_onewire0: onewire0 {
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groups = "w1";
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function = "w1";
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bias-pull-up;
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};
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};
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reset@1 {
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compatible = "sandbox,reset";
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};
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sound {
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compatible = "sandbox,sound";
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cpu {
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sound-dai = <&i2s 0>;
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};
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codec {
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sound-dai = <&audio 0>;
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};
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};
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spi@0 {
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firmware_storage_spi: flash@0 {
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u-boot,dm-pre-reloc;
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reg = <0>;
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compatible = "spansion,m25p16", "jedec,spi-nor";
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spi-max-frequency = <40000000>;
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sandbox,filename = "spi.bin";
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};
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};
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spl-test {
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u-boot,dm-pre-reloc;
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compatible = "sandbox,spl-test";
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boolval;
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intval = <1>;
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intarray = <2 3 4>;
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byteval = [05];
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bytearray = [06];
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longbytearray = [09 0a 0b 0c 0d 0e 0f 10 11];
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stringval = "message";
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stringarray = "multi-word", "message";
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};
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spl-test2 {
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u-boot,dm-pre-reloc;
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compatible = "sandbox,spl-test";
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intval = <3>;
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intarray = <5>;
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byteval = [08];
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bytearray = [01 23 34];
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longbytearray = [09 0a 0b 0c];
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stringval = "message2";
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stringarray = "another", "multi-word", "message";
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};
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spl-test3 {
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u-boot,dm-pre-reloc;
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compatible = "sandbox,spl-test";
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stringarray = "one";
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};
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spl-test4 {
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u-boot,dm-pre-reloc;
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compatible = "sandbox,spl-test.2";
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};
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spl-test5 {
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u-boot,dm-tpl;
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compatible = "sandbox,spl-test";
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stringarray = "tpl";
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};
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spl-test6 {
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u-boot,dm-pre-proper;
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compatible = "sandbox,spl-test";
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stringarray = "pre-proper";
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};
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spl-test7 {
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u-boot,dm-spl;
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compatible = "sandbox,spl-test";
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stringarray = "spl";
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};
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square {
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compatible = "demo-shape";
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colour = "blue";
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sides = <4>;
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};
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timer {
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compatible = "sandbox,timer";
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clock-frequency = <1000000>;
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};
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tpm {
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u-boot,dm-pre-reloc;
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compatible = "google,sandbox-tpm";
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};
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tpm2 {
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compatible = "sandbox,tpm2";
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};
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triangle {
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compatible = "demo-shape";
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colour = "cyan";
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sides = <3>;
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character = <83>;
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light-gpios = <&gpio_a 2>, <&gpio_b 6 0>;
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};
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/* Needs to be available prior to relocation */
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uart0: serial {
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u-boot,dm-spl;
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compatible = "sandbox,serial";
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sandbox,text-colour = "cyan";
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_serial0>;
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};
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usb@0 {
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compatible = "sandbox,usb";
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status = "disabled";
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hub {
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compatible = "sandbox,usb-hub";
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#address-cells = <1>;
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#size-cells = <0>;
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flash-stick {
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reg = <0>;
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compatible = "sandbox,usb-flash";
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};
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};
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};
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usb@1 {
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compatible = "sandbox,usb";
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hub {
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compatible = "usb-hub";
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usb,device-class = <USB_CLASS_HUB>;
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hub-emul {
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compatible = "sandbox,usb-hub";
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#address-cells = <1>;
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#size-cells = <0>;
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flash-stick {
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reg = <0>;
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compatible = "sandbox,usb-flash";
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sandbox,filepath = "flash.bin";
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};
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};
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};
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};
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usb@2 {
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compatible = "sandbox,usb";
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status = "disabled";
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};
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spmi: spmi@0 {
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compatible = "sandbox,spmi";
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#address-cells = <0x1>;
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#size-cells = <0x1>;
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pm8916@0 {
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compatible = "qcom,spmi-pmic";
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reg = <0x0 0x1>;
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#address-cells = <0x1>;
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#size-cells = <0x1>;
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spmi_gpios: gpios@c000 {
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compatible = "qcom,pm8916-gpio";
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reg = <0xc000 0x400>;
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gpio-controller;
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gpio-count = <4>;
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#gpio-cells = <2>;
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gpio-bank-name="spmi";
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};
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};
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};
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axi: axi@0 {
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compatible = "sandbox,axi";
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#address-cells = <0x1>;
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#size-cells = <0x1>;
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store@0 {
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compatible = "sandbox,sandbox_store";
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reg = <0x0 0x400>;
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};
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};
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onewire0: onewire {
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compatible = "w1-gpio";
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gpios = <&gpio_a 8>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_onewire0>;
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status = "okay";
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sandbox_eeprom0: sandbox_eeprom@0 {
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compatible = "sandbox,w1-eeprom";
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status = "okay";
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};
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};
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sandbox_tee {
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compatible = "sandbox,tee";
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};
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};
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&cros_ec {
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/*
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* This describes the flash memory within the EC. Note
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* that the STM32L flash erases to 0, not 0xff.
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*/
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flash {
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image-pos = <0x08000000>;
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size = <0x20000>;
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erase-value = <0>;
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/* Information for sandbox */
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ro {
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image-pos = <0>;
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size = <0xf000>;
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};
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wp-ro {
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image-pos = <0xf000>;
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size = <0x1000>;
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};
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rw {
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image-pos = <0x10000>;
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size = <0x10000>;
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};
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};
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keyboard-controller {
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u-boot,dm-pre-reloc;
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};
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};
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