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musb/allwinner: add support for configuring phy as well as device mode

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At least on Orange Pi PC Plus even the host mode does not work without
enabling the phy and setting it to the host mode.

The driver will now parse dr_mode property and will try to configure
itself and the phy accordingly.
OTG mode is not supported yet, so it is treated as the device / peripheral
mode.

The phy is enabled -- powered on -- only for the host mode.

The device mode requires support from a phy driver, e.g., aw_usbphy on
Allwinner platform.
aw_usbphy does not support the device mode, so it cannnot work yet.

MFC after:	6 weeks
This commit is contained in:
Andriy Gapon 2020-09-07 06:53:29 +00:00
parent f206695209
commit 1668d773a4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=365402
1 changed files with 67 additions and 3 deletions
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70
sys/dev/usb/controller/musb_otg_allwinner.c
View File

@ -64,6 +64,8 @@ __FBSDID("$FreeBSD$");
#include <dev/extres/clk/clk.h>
#include <dev/extres/hwreset/hwreset.h>
#include <dev/extres/phy/phy.h>
#include <dev/extres/phy/phy_usb.h>
#ifdef __arm__
#include <arm/allwinner/aw_machdep.h>
@ -121,6 +123,7 @@ struct awusbdrd_softc {
struct resource *res[2];
clk_t clk;
hwreset_t reset;
phy_t phy;
struct bus_space bs;
int flags;
};
@ -382,7 +385,10 @@ awusbdrd_probe(device_t dev)
static int
awusbdrd_attach(device_t dev)
{
char usb_mode[24];
struct awusbdrd_softc *sc;
uint8_t musb_mode;
int phy_mode;
int error;
sc = device_get_softc(dev);
@ -392,6 +398,31 @@ awusbdrd_attach(device_t dev)
if (error != 0)
return (error);
musb_mode = MUSB2_HOST_MODE; /* default */
phy_mode = PHY_USB_MODE_HOST;
if (OF_getprop(ofw_bus_get_node(dev), "dr_mode",
&usb_mode, sizeof(usb_mode)) > 0) {
usb_mode[sizeof(usb_mode) - 1] = 0;
if (strcasecmp(usb_mode, "host") == 0) {
musb_mode = MUSB2_HOST_MODE;
phy_mode = PHY_USB_MODE_HOST;
} else if (strcasecmp(usb_mode, "peripheral") == 0) {
musb_mode = MUSB2_DEVICE_MODE;
phy_mode = PHY_USB_MODE_DEVICE;
} else if (strcasecmp(usb_mode, "otg") == 0) {
/*
* XXX phy has PHY_USB_MODE_OTG, but MUSB does not have
* it. It's not clear how to propagate mode changes
* from phy layer (that detects them) to MUSB.
*/
musb_mode = MUSB2_DEVICE_MODE;
phy_mode = PHY_USB_MODE_DEVICE;
} else {
device_printf(dev, "Invalid FDT dr_mode: %s\n",
usb_mode);
}
}
/* AHB gate clock is required */
error = clk_get_by_ofw_index(dev, 0, 0, &sc->clk);
if (error != 0)
@ -415,6 +446,24 @@ awusbdrd_attach(device_t dev)
}
}
/* XXX not sure if this is universally needed. */
(void)phy_get_by_ofw_name(dev, 0, "usb", &sc->phy);
if (sc->phy != NULL) {
device_printf(dev, "setting phy mode %d\n", phy_mode);
if (musb_mode == MUSB2_HOST_MODE) {
error = phy_enable(sc->phy);
if (error != 0) {
device_printf(dev, "Could not enable phy\n");
goto fail;
}
}
error = phy_usb_set_mode(sc->phy, phy_mode);
if (error != 0) {
device_printf(dev, "Could not set phy mode\n");
goto fail;
}
}
sc->sc.sc_bus.parent = dev;
sc->sc.sc_bus.devices = sc->sc.sc_devices;
sc->sc.sc_bus.devices_max = MUSB2_MAX_DEVICES;
@ -457,7 +506,7 @@ awusbdrd_attach(device_t dev)
device_set_ivars(sc->sc.sc_bus.bdev, &sc->sc.sc_bus);
sc->sc.sc_id = 0;
sc->sc.sc_platform_data = sc;
sc->sc.sc_mode = MUSB2_HOST_MODE; /* XXX HOST vs DEVICE mode */
sc->sc.sc_mode = musb_mode;
if (ofw_bus_is_compatible(dev, "allwinner,sun8i-h3-musb")) {
sc->sc.sc_ep_cfg = musbotg_ep_allwinner_h3;
sc->sc.sc_ep_max = DRD_EP_MAX_H3;
@ -497,8 +546,15 @@ awusbdrd_attach(device_t dev)
return (0);
fail:
if (sc->reset != NULL)
if (sc->phy != NULL) {
if (musb_mode == MUSB2_HOST_MODE)
(void)phy_disable(sc->phy);
phy_release(sc->phy);
}
if (sc->reset != NULL) {
hwreset_assert(sc->reset);
hwreset_release(sc->reset);
}
if (sc->clk != NULL)
clk_release(sc->clk);
bus_release_resources(dev, awusbdrd_spec, sc->res);
@ -527,8 +583,16 @@ awusbdrd_detach(device_t dev)
usb_bus_mem_free_all(&sc->sc.sc_bus, NULL);
if (sc->reset != NULL)
if (sc->phy != NULL) {
if (sc->sc.sc_mode == MUSB2_HOST_MODE)
phy_disable(sc->phy);
phy_release(sc->phy);
}
if (sc->reset != NULL) {
if (hwreset_assert(sc->reset) != 0)
device_printf(dev, "failed to assert reset\n");
hwreset_release(sc->reset);
}
if (sc->clk != NULL)
clk_release(sc->clk);