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https://github.com/brain-hackers/u-boot-brain
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usb: dwc2: convert driver to DM_USB_GADGET
Minimal conversion to driver model by using the uclass UCLASS_USB_GADGET_GENERIC based on: - reset uclass - clock uclass - generic uclass. Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com> Reviewed-by: Lukasz Majewski <lukma@denx.de>
This commit is contained in:
Patrick Delaunay
Marek Vasut
parent
a812d77617
commit
c791c8431c
54
doc/device-tree-bindings/usb/dwc2.txt
Normal file
54
doc/device-tree-bindings/usb/dwc2.txt
Normal file
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@ -0,0 +1,54 @@
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Platform DesignWare HS OTG USB 2.0 controller
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-----------------------------------------------------
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Required properties:
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- compatible : One of:
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- brcm,bcm2835-usb: The DWC2 USB controller instance in the BCM2835 SoC.
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- hisilicon,hi6220-usb: The DWC2 USB controller instance in the hi6220 SoC.
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- rockchip,rk3066-usb: The DWC2 USB controller instance in the rk3066 Soc;
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- "rockchip,px30-usb", "rockchip,rk3066-usb", "snps,dwc2": for px30 Soc;
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- "rockchip,rk3188-usb", "rockchip,rk3066-usb", "snps,dwc2": for rk3188 Soc;
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- "rockchip,rk3288-usb", "rockchip,rk3066-usb", "snps,dwc2": for rk3288 Soc;
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- "lantiq,arx100-usb": The DWC2 USB controller instance in Lantiq ARX SoCs;
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- "lantiq,xrx200-usb": The DWC2 USB controller instance in Lantiq XRX SoCs;
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- "amlogic,meson8-usb": The DWC2 USB controller instance in Amlogic Meson8 SoCs;
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- "amlogic,meson8b-usb": The DWC2 USB controller instance in Amlogic Meson8b SoCs;
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- "amlogic,meson-gxbb-usb": The DWC2 USB controller instance in Amlogic S905 SoCs;
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- "amcc,dwc-otg": The DWC2 USB controller instance in AMCC Canyonlands 460EX SoCs;
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- snps,dwc2: A generic DWC2 USB controller with default parameters.
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- "st,stm32f4x9-fsotg": The DWC2 USB FS/HS controller instance in STM32F4x9 SoCs
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configured in FS mode;
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- "st,stm32f4x9-hsotg": The DWC2 USB HS controller instance in STM32F4x9 SoCs
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configured in HS mode;
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- "st,stm32f7-hsotg": The DWC2 USB HS controller instance in STM32F7 SoCs
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configured in HS mode;
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- reg : Should contain 1 register range (address and length)
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- interrupts : Should contain 1 interrupt
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- clocks: clock provider specifier
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- clock-names: shall be "otg"
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Refer to clk/clock-bindings.txt for generic clock consumer properties
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Optional properties:
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- phys: phy provider specifier
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- phy-names: shall be "usb2-phy"
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Refer to phy/phy-bindings.txt for generic phy consumer properties
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- dr_mode: shall be one of "host", "peripheral" and "otg"
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Refer to usb/generic.txt
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- g-rx-fifo-size: size of rx fifo size in gadget mode.
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- g-np-tx-fifo-size: size of non-periodic tx fifo size in gadget mode.
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- g-tx-fifo-size: size of periodic tx fifo per endpoint (except ep0) in gadget mode.
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Deprecated properties:
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- g-use-dma: gadget DMA mode is automatically detected
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Example:
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usb@101c0000 {
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compatible = "ralink,rt3050-usb, snps,dwc2";
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reg = <0x101c0000 40000>;
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interrupts = <18>;
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clocks = <&usb_otg_ahb_clk>;
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clock-names = "otg";
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phys = <&usbphy>;
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phy-names = "usb2-phy";
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};
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@ -18,11 +18,17 @@
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*/
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#undef DEBUG
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#include <common.h>
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#include <clk.h>
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#include <dm.h>
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#include <generic-phy.h>
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#include <malloc.h>
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#include <reset.h>
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#include <linux/errno.h>
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#include <linux/list.h>
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#include <malloc.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/gadget.h>
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#include <asm/byteorder.h>
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@ -31,6 +37,8 @@
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#include <asm/mach-types.h>
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#include <power/regulator.h>
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#include "dwc2_udc_otg_regs.h"
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#include "dwc2_udc_otg_priv.h"
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@ -222,6 +230,7 @@ static int udc_enable(struct dwc2_udc *dev)
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return 0;
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}
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#if !CONFIG_IS_ENABLED(DM_USB_GADGET)
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/*
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Register entry point for the peripheral controller driver.
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*/
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@ -296,6 +305,54 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
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udc_disable(dev);
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return 0;
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}
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#else /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
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static int dwc2_gadget_start(struct usb_gadget *g,
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struct usb_gadget_driver *driver)
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{
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struct dwc2_udc *dev = the_controller;
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debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
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if (!driver ||
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(driver->speed != USB_SPEED_FULL &&
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driver->speed != USB_SPEED_HIGH) ||
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!driver->bind || !driver->disconnect || !driver->setup)
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return -EINVAL;
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if (!dev)
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return -ENODEV;
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if (dev->driver)
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return -EBUSY;
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/* first hook up the driver ... */
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dev->driver = driver;
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debug_cond(DEBUG_SETUP != 0,
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"Registered gadget driver %s\n", dev->gadget.name);
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return udc_enable(dev);
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}
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static int dwc2_gadget_stop(struct usb_gadget *g)
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{
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struct dwc2_udc *dev = the_controller;
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if (!dev)
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return -ENODEV;
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if (!dev->driver)
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return -EINVAL;
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dev->driver = 0;
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stop_activity(dev, dev->driver);
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udc_disable(dev);
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return 0;
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}
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#endif /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
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/*
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* done - retire a request; caller blocked irqs
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@ -730,6 +787,10 @@ static void dwc2_fifo_flush(struct usb_ep *_ep)
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static const struct usb_gadget_ops dwc2_udc_ops = {
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/* current versions must always be self-powered */
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#if CONFIG_IS_ENABLED(DM_USB_GADGET)
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.udc_start = dwc2_gadget_start,
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.udc_stop = dwc2_gadget_stop,
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#endif
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};
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static struct dwc2_udc memory = {
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@ -841,12 +902,239 @@ int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata)
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return retval;
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}
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int usb_gadget_handle_interrupts(int index)
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int dwc2_udc_handle_interrupt(void)
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{
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u32 intr_status = readl(®->gintsts);
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u32 gintmsk = readl(®->gintmsk);
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if (intr_status & gintmsk)
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return dwc2_udc_irq(1, (void *)the_controller);
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return 0;
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}
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#if !CONFIG_IS_ENABLED(DM_USB_GADGET)
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int usb_gadget_handle_interrupts(int index)
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{
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return dwc2_udc_handle_interrupt();
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}
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#else /* CONFIG_IS_ENABLED(DM_USB_GADGET) */
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struct dwc2_priv_data {
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struct clk_bulk clks;
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struct reset_ctl_bulk resets;
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struct phy *phys;
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int num_phys;
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};
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int dm_usb_gadget_handle_interrupts(struct udevice *dev)
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{
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return dwc2_udc_handle_interrupt();
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}
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int dwc2_phy_setup(struct udevice *dev, struct phy **array, int *num_phys)
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{
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int i, ret, count;
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struct phy *usb_phys;
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/* Return if no phy declared */
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if (!dev_read_prop(dev, "phys", NULL))
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return 0;
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count = dev_count_phandle_with_args(dev, "phys", "#phy-cells");
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if (count <= 0)
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return count;
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usb_phys = devm_kcalloc(dev, count, sizeof(struct phy),
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GFP_KERNEL);
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if (!usb_phys)
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return -ENOMEM;
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for (i = 0; i < count; i++) {
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ret = generic_phy_get_by_index(dev, i, &usb_phys[i]);
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if (ret && ret != -ENOENT) {
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dev_err(dev, "Failed to get USB PHY%d for %s\n",
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i, dev->name);
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return ret;
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}
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}
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for (i = 0; i < count; i++) {
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ret = generic_phy_init(&usb_phys[i]);
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if (ret) {
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dev_err(dev, "Can't init USB PHY%d for %s\n",
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i, dev->name);
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goto phys_init_err;
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}
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}
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for (i = 0; i < count; i++) {
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ret = generic_phy_power_on(&usb_phys[i]);
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if (ret) {
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dev_err(dev, "Can't power USB PHY%d for %s\n",
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i, dev->name);
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goto phys_poweron_err;
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}
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}
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*array = usb_phys;
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*num_phys = count;
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return 0;
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phys_poweron_err:
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for (i = count - 1; i >= 0; i--)
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generic_phy_power_off(&usb_phys[i]);
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for (i = 0; i < count; i++)
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generic_phy_exit(&usb_phys[i]);
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return ret;
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phys_init_err:
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for (; i >= 0; i--)
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generic_phy_exit(&usb_phys[i]);
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return ret;
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}
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void dwc2_phy_shutdown(struct udevice *dev, struct phy *usb_phys, int num_phys)
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{
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int i, ret;
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for (i = 0; i < num_phys; i++) {
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if (!generic_phy_valid(&usb_phys[i]))
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continue;
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ret = generic_phy_power_off(&usb_phys[i]);
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ret |= generic_phy_exit(&usb_phys[i]);
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if (ret) {
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dev_err(dev, "Can't shutdown USB PHY%d for %s\n",
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i, dev->name);
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}
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}
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}
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static int dwc2_udc_otg_ofdata_to_platdata(struct udevice *dev)
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{
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struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
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int node = dev_of_offset(dev);
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if (usb_get_dr_mode(node) != USB_DR_MODE_PERIPHERAL) {
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dev_dbg(dev, "Invalid mode\n");
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return -ENODEV;
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}
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platdata->regs_otg = dev_read_addr(dev);
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platdata->rx_fifo_sz = dev_read_u32_default(dev, "g-rx-fifo-size", 0);
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platdata->np_tx_fifo_sz = dev_read_u32_default(dev,
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"g-np-tx-fifo-size", 0);
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platdata->tx_fifo_sz = dev_read_u32_default(dev, "g-tx-fifo-size", 0);
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return 0;
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}
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static int dwc2_udc_otg_reset_init(struct udevice *dev,
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struct reset_ctl_bulk *resets)
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{
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int ret;
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ret = reset_get_bulk(dev, resets);
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if (ret == -ENOTSUPP)
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return 0;
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if (ret)
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return ret;
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ret = reset_deassert_bulk(resets);
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if (ret) {
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reset_release_bulk(resets);
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return ret;
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}
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return 0;
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}
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static int dwc2_udc_otg_clk_init(struct udevice *dev,
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struct clk_bulk *clks)
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{
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int ret;
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ret = clk_get_bulk(dev, clks);
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if (ret == -ENOSYS)
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return 0;
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if (ret)
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return ret;
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ret = clk_enable_bulk(clks);
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if (ret) {
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clk_release_bulk(clks);
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return ret;
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}
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return 0;
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}
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static int dwc2_udc_otg_probe(struct udevice *dev)
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{
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struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
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struct dwc2_priv_data *priv = dev_get_priv(dev);
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int ret;
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ret = dwc2_udc_otg_clk_init(dev, &priv->clks);
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if (ret)
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return ret;
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ret = dwc2_udc_otg_reset_init(dev, &priv->resets);
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if (ret)
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return ret;
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ret = dwc2_phy_setup(dev, &priv->phys, &priv->num_phys);
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if (ret)
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return ret;
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ret = dwc2_udc_probe(platdata);
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if (ret)
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return ret;
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the_controller->driver = 0;
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ret = usb_add_gadget_udc((struct device *)dev, &the_controller->gadget);
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return ret;
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}
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static int dwc2_udc_otg_remove(struct udevice *dev)
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{
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struct dwc2_priv_data *priv = dev_get_priv(dev);
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usb_del_gadget_udc(&the_controller->gadget);
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reset_release_bulk(&priv->resets);
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clk_release_bulk(&priv->clks);
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dwc2_phy_shutdown(dev, priv->phys, priv->num_phys);
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return dm_scan_fdt_dev(dev);
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}
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static const struct udevice_id dwc2_udc_otg_ids[] = {
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{ .compatible = "snps,dwc2" },
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};
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U_BOOT_DRIVER(dwc2_udc_otg) = {
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.name = "dwc2-udc-otg",
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.id = UCLASS_USB_GADGET_GENERIC,
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.of_match = dwc2_udc_otg_ids,
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.ofdata_to_platdata = dwc2_udc_otg_ofdata_to_platdata,
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.probe = dwc2_udc_otg_probe,
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.remove = dwc2_udc_otg_remove,
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.platdata_auto_alloc_size = sizeof(struct dwc2_plat_otg_data),
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.priv_auto_alloc_size = sizeof(struct dwc2_priv_data),
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};
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#endif /* CONFIG_IS_ENABLED(DM_USB_GADGET) */
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