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dwc3-generic: Handle the PHYs, the clocks and the reset lines

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This make the driver more generic. At this point this driver can replace
the dwc3-of-simple implementation.
Make the description in the Kconfig more generic too.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
This commit is contained in:
Jean-Jacques Hiblot 2018-11-29 10:52:48 +01:00 committed by Marek Vasut
parent 004787aeed
commit 446e3a205b
2 changed files with 137 additions and 29 deletions
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7
drivers/usb/dwc3/Kconfig
View file

@ -38,10 +38,11 @@ config USB_DWC3_OMAP
Say 'Y' here if you have one such device
config USB_DWC3_GENERIC
bool "Xilinx ZynqMP and similar Platforms"
depends on DM_USB && USB_DWC3
bool "Generic implementation of a DWC3 wrapper (aka dwc3 glue)"
depends on DM_USB && USB_DWC3 && MISC
help
Some platforms can reuse this DWC3 generic implementation.
Select this for Xilinx ZynqMP and similar Platforms.
This wrapper supports Host and Peripheral operation modes.
config USB_DWC3_UNIPHIER
bool "DesignWare USB3 Host Support on UniPhier Platforms"

159
drivers/usb/dwc3/dwc3-generic.c
View file

@ -11,58 +11,85 @@
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <linux/usb/otg.h>
#include <linux/compat.h>
#include <dwc3-uboot.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <malloc.h>
#include <usb.h>
#include "core.h"
#include "gadget.h"
#include "linux-compat.h"
#include <reset.h>
#include <clk.h>
#if CONFIG_IS_ENABLED(DM_USB_GADGET)
struct dwc3_generic_peripheral {
struct dwc3 dwc3;
struct phy *phys;
int num_phys;
fdt_addr_t base;
};
int dm_usb_gadget_handle_interrupts(struct udevice *dev)
{
struct dwc3 *priv = dev_get_priv(dev);
struct dwc3_generic_peripheral *priv = dev_get_priv(dev);
struct dwc3 *dwc3 = &priv->dwc3;
dwc3_gadget_uboot_handle_interrupt(priv);
dwc3_gadget_uboot_handle_interrupt(dwc3);
return 0;
}
static int dwc3_generic_peripheral_probe(struct udevice *dev)
{
struct dwc3 *priv = dev_get_priv(dev);
int rc;
struct dwc3_generic_peripheral *priv = dev_get_priv(dev);
struct dwc3 *dwc3 = &priv->dwc3;
return dwc3_init(priv);
rc = dwc3_setup_phy(dev, &priv->phys, &priv->num_phys);
if (rc)
return rc;
dwc3->regs = map_physmem(priv->base, DWC3_OTG_REGS_END, MAP_NOCACHE);
dwc3->regs += DWC3_GLOBALS_REGS_START;
dwc3->dev = dev;
rc = dwc3_init(dwc3);
if (rc) {
unmap_physmem(dwc3->regs, MAP_NOCACHE);
return rc;
}
return 0;
}
static int dwc3_generic_peripheral_remove(struct udevice *dev)
{
struct dwc3 *priv = dev_get_priv(dev);
struct dwc3_generic_peripheral *priv = dev_get_priv(dev);
struct dwc3 *dwc3 = &priv->dwc3;
dwc3_remove(priv);
dwc3_remove(dwc3);
dwc3_shutdown_phy(dev, priv->phys, priv->num_phys);
unmap_physmem(dwc3->regs, MAP_NOCACHE);
return 0;
}
static int dwc3_generic_peripheral_ofdata_to_platdata(struct udevice *dev)
{
struct dwc3 *priv = dev_get_priv(dev);
struct dwc3_generic_peripheral *priv = dev_get_priv(dev);
struct dwc3 *dwc3 = &priv->dwc3;
int node = dev_of_offset(dev);
priv->regs = (void *)devfdt_get_addr(dev);
priv->regs += DWC3_GLOBALS_REGS_START;
priv->base = devfdt_get_addr(dev);
priv->maximum_speed = usb_get_maximum_speed(node);
if (priv->maximum_speed == USB_SPEED_UNKNOWN) {
dwc3->maximum_speed = usb_get_maximum_speed(node);
if (dwc3->maximum_speed == USB_SPEED_UNKNOWN) {
pr_err("Invalid usb maximum speed\n");
return -ENODEV;
}
priv->dr_mode = usb_get_dr_mode(node);
if (priv->dr_mode == USB_DR_MODE_UNKNOWN) {
dwc3->dr_mode = usb_get_dr_mode(node);
if (dwc3->dr_mode == USB_DR_MODE_UNKNOWN) {
pr_err("Invalid usb mode setup\n");
return -ENODEV;
}
@ -76,12 +103,16 @@ U_BOOT_DRIVER(dwc3_generic_peripheral) = {
.ofdata_to_platdata = dwc3_generic_peripheral_ofdata_to_platdata,
.probe = dwc3_generic_peripheral_probe,
.remove = dwc3_generic_peripheral_remove,
.platdata_auto_alloc_size = sizeof(struct usb_platdata),
.priv_auto_alloc_size = sizeof(struct dwc3),
.priv_auto_alloc_size = sizeof(struct dwc3_generic_peripheral),
};
#endif
static int dwc3_generic_bind(struct udevice *parent)
struct dwc3_glue_data {
struct clk_bulk clks;
struct reset_ctl_bulk resets;
};
static int dwc3_glue_bind(struct udevice *parent)
{
const void *fdt = gd->fdt_blob;
int node;
@ -92,29 +123,32 @@ static int dwc3_generic_bind(struct udevice *parent)
const char *name = fdt_get_name(fdt, node, NULL);
enum usb_dr_mode dr_mode;
struct udevice *dev;
const char *driver;
const char *driver = NULL;
debug("%s: subnode name: %s\n", __func__, name);
if (strncmp(name, "dwc3@", 4))
continue;
dr_mode = usb_get_dr_mode(node);
switch (dr_mode) {
case USB_DR_MODE_PERIPHERAL:
case USB_DR_MODE_OTG:
#if CONFIG_IS_ENABLED(DM_USB_GADGET)
debug("%s: dr_mode: OTG or Peripheral\n", __func__);
driver = "dwc3-generic-peripheral";
#endif
break;
case USB_DR_MODE_HOST:
debug("%s: dr_mode: HOST\n", __func__);
driver = "dwc3-generic-host";
driver = "xhci-dwc3";
break;
default:
debug("%s: unsupported dr_mode\n", __func__);
return -ENODEV;
};
if (!driver)
continue;
ret = device_bind_driver_to_node(parent, driver, name,
offset_to_ofnode(node), &dev);
if (ret) {
@ -127,7 +161,76 @@ static int dwc3_generic_bind(struct udevice *parent)
return 0;
}
static const struct udevice_id dwc3_generic_ids[] = {
static int dwc3_glue_reset_init(struct udevice *dev,
struct dwc3_glue_data *glue)
{
int ret;
ret = reset_get_bulk(dev, &glue->resets);
if (ret == -ENOTSUPP)
return 0;
else if (ret)
return ret;
ret = reset_deassert_bulk(&glue->resets);
if (ret) {
reset_release_bulk(&glue->resets);
return ret;
}
return 0;
}
static int dwc3_glue_clk_init(struct udevice *dev,
struct dwc3_glue_data *glue)
{
int ret;
ret = clk_get_bulk(dev, &glue->clks);
if (ret == -ENOSYS)
return 0;
if (ret)
return ret;
#if CONFIG_IS_ENABLED(CLK)
ret = clk_enable_bulk(&glue->clks);
if (ret) {
clk_release_bulk(&glue->clks);
return ret;
}
#endif
return 0;
}
static int dwc3_glue_probe(struct udevice *dev)
{
struct dwc3_glue_data *glue = dev_get_platdata(dev);
int ret;
ret = dwc3_glue_clk_init(dev, glue);
if (ret)
return ret;
ret = dwc3_glue_reset_init(dev, glue);
if (ret)
return ret;
return 0;
}
static int dwc3_glue_remove(struct udevice *dev)
{
struct dwc3_glue_data *glue = dev_get_platdata(dev);
reset_release_bulk(&glue->resets);
clk_release_bulk(&glue->clks);
return dm_scan_fdt_dev(dev);
}
static const struct udevice_id dwc3_glue_ids[] = {
{ .compatible = "xlnx,zynqmp-dwc3" },
{ }
};
@ -135,6 +238,10 @@ static const struct udevice_id dwc3_generic_ids[] = {
U_BOOT_DRIVER(dwc3_generic_wrapper) = {
.name = "dwc3-generic-wrapper",
.id = UCLASS_MISC,
.of_match = dwc3_generic_ids,
.bind = dwc3_generic_bind,
.of_match = dwc3_glue_ids,
.bind = dwc3_glue_bind,
.probe = dwc3_glue_probe,
.remove = dwc3_glue_remove,
.platdata_auto_alloc_size = sizeof(struct dwc3_glue_data),
};