[U-Boot] [PATCH 07/11] drivers: usb: dwc3: add ti dwc3 peripheral driver with driver model support
Vignesh R
vigneshr at ti.com
Tue May 23 11:55:42 UTC 2017
From: Mugunthan V N <mugunthanvnm at ti.com>
Add a TI DWC3 peripheral driver with driver model support and the
driver will be bound by the DWC3 wrapper driver based on the
dr_mode device tree entry.
Signed-off-by: Mugunthan V N <mugunthanvnm at ti.com>
Signed-off-by: Vignesh R <vigneshr at ti.com>
---
drivers/usb/dwc3/core.c | 57 +++++++++++++++
drivers/usb/dwc3/core.h | 2 +
drivers/usb/dwc3/dwc3-omap.c | 167 ++++++++++++++++++++++++++++++++++++++++++-
3 files changed, 225 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 98102bd6b00a..a895f8fbddd3 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -603,6 +603,8 @@ static void dwc3_core_exit_mode(struct dwc3 *dwc)
#define DWC3_ALIGN_MASK (16 - 1)
+#ifndef CONFIG_DM_USB
+
/**
* dwc3_uboot_init - dwc3 core uboot initialization code
* @dwc3_dev: struct dwc3_device containing initialization data
@@ -789,3 +791,58 @@ MODULE_ALIAS("platform:dwc3");
MODULE_AUTHOR("Felipe Balbi <balbi at ti.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
+
+#else
+
+int dwc3_init(struct dwc3 *dwc)
+{
+ int ret;
+
+ dwc3_cache_hwparams(dwc);
+
+ ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
+ if (ret) {
+ dev_err(dwc->dev, "failed to allocate event buffers\n");
+ return -ENOMEM;
+ }
+
+ ret = dwc3_core_init(dwc);
+ if (ret) {
+ dev_err(dev, "failed to initialize core\n");
+ goto err0;
+ }
+
+ ret = dwc3_event_buffers_setup(dwc);
+ if (ret) {
+ dev_err(dwc->dev, "failed to setup event buffers\n");
+ goto err1;
+ }
+
+ ret = dwc3_core_init_mode(dwc);
+ if (ret)
+ goto err2;
+
+ return 0;
+
+err2:
+ dwc3_event_buffers_cleanup(dwc);
+
+err1:
+ dwc3_core_exit(dwc);
+
+err0:
+ dwc3_free_event_buffers(dwc);
+
+ return ret;
+}
+
+void dwc3_remove(struct dwc3 *dwc)
+{
+ dwc3_core_exit_mode(dwc);
+ dwc3_event_buffers_cleanup(dwc);
+ dwc3_free_event_buffers(dwc);
+ dwc3_core_exit(dwc);
+ kfree(dwc->mem);
+}
+
+#endif
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 24f03e484fd5..972628751697 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -992,6 +992,8 @@ struct dwc3_gadget_ep_cmd_params {
/* prototypes */
int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc);
+int dwc3_init(struct dwc3 *dwc);
+void dwc3_remove(struct dwc3 *dwc);
#ifdef CONFIG_USB_DWC3_HOST
int dwc3_host_init(struct dwc3 *dwc);
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 10b93eed5793..e55201a5845b 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -27,9 +27,21 @@
#include <dwc3-uboot.h>
#include "linux-compat.h"
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <ti-usb-phy-uboot.h>
+#include <usb.h>
+
+#include "core.h"
#include <libfdt.h>
#include <dm/device.h>
+#include <dm/uclass.h>
+#include <dm/lists.h>
+#include <dwc3-uboot.h>
+
+#include <asm/omap_common.h>
+#include "gadget.h"
DECLARE_GLOBAL_DATA_PTR;
@@ -140,7 +152,11 @@ struct dwc3_omap {
u32 index;
};
-#ifndef CONFIG_DM_USB
+struct omap_dwc3_priv {
+ struct dwc3_omap omap;
+ struct dwc3 dwc3;
+ struct ti_usb_phy_device phy_device;
+};
static LIST_HEAD(dwc3_omap_list);
@@ -369,6 +385,8 @@ static void dwc3_omap_set_utmi_mode(struct dwc3_omap *omap, int utmi_mode)
dwc3_omap_write_utmi_status(omap, reg);
}
+#ifndef CONFIG_DM_USB
+
/**
* dwc3_omap_uboot_init - dwc3 omap uboot initialization code
* @dev: struct dwc3_omap_device containing initialization data
@@ -472,15 +490,155 @@ MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");
#else
+int usb_gadget_handle_interrupts(int index)
+{
+ struct omap_dwc3_priv *priv;
+ struct dwc3_omap *omap;
+ struct dwc3 *dwc;
+ struct udevice *dev;
+ u32 status;
+ int ret;
+
+ ret = uclass_first_device(UCLASS_USB_DEV_GENERIC, &dev);
+ if (!dev || ret) {
+ error("No USB device found\n");
+ return -ENODEV;
+ }
+
+ priv = dev_get_priv(dev);
+ omap = &priv->omap;
+ dwc = &priv->dwc3;
+
+ status = dwc3_omap_interrupt(-1, omap);
+ if (status)
+ dwc3_gadget_uboot_handle_interrupt(dwc);
+
+ return 0;
+}
+
+static int dwc3_omap_peripheral_probe(struct udevice *dev)
+{
+ struct omap_dwc3_priv *priv = dev_get_priv(dev);
+ struct dwc3_omap *omap = &priv->omap;
+ struct dwc3 *dwc = &priv->dwc3;
+ u32 reg;
+ int ret;
+
+ enable_usb_clocks(0);
+
+ /* Initialize usb phy */
+ ret = ti_usb_phy_uboot_init(&priv->phy_device);
+ if (ret)
+ return ret;
+
+ dwc3_omap_map_offset(omap);
+ dwc3_omap_set_utmi_mode(omap, DWC3_OMAP_UTMI_MODE_SW);
+
+ /* check the DMA Status */
+ reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
+ omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);
+
+ dwc3_omap_enable_irqs(omap);
+
+ dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
+
+ /* default to highest possible threshold */
+ dwc->lpm_nyet_threshold = 0xff;
+ /*
+ * default to assert utmi_sleep_n and use maximum allowed HIRD
+ * threshold value of 0b1100
+ */
+ dwc->hird_threshold = 12;
+ /* default to -3.5dB de-emphasis */
+ dwc->tx_de_emphasis = 1;
+
+ dwc->needs_fifo_resize = false;
+ dwc->index = 0;
+
+ return dwc3_init(dwc);
+}
+
+static int dwc3_omap_peripheral_remove(struct udevice *dev)
+{
+ struct omap_dwc3_priv *priv = dev_get_priv(dev);
+ struct dwc3_omap *omap = &priv->omap;
+ struct dwc3 *dwc = &priv->dwc3;
+
+ dwc3_omap_disable_irqs(omap);
+ dwc3_remove(dwc);
+
+ return 0;
+}
+
+static int dwc3_omap_ofdata_to_platdata(struct udevice *dev)
+{
+ struct omap_dwc3_priv *priv = dev_get_priv(dev);
+ const void *fdt = gd->fdt_blob;
+ int node = dev->of_offset;
+ int ctrlmodnode;
+ int physnode;
+
+ priv->omap.base = map_physmem(fdtdec_get_addr(fdt,
+ dev->parent->of_offset, "reg"), 0,
+ MAP_NOCACHE);
+
+ priv->dwc3.regs = dev_map_physmem(dev, 0);
+ priv->dwc3.regs += DWC3_GLOBALS_REGS_START;
+
+ physnode = fdtdec_lookup_phandle(fdt, node, "phys");
+ ctrlmodnode = fdtdec_lookup_phandle(fdt, physnode, "ctrl-module");
+ priv->phy_device.usb2_phy_power =
+ map_physmem(fdtdec_get_addr(fdt, ctrlmodnode, "reg"),
+ 0, MAP_NOCACHE);
+ priv->phy_device.index = 0;
+
+ priv->dwc3.maximum_speed = usb_get_maximum_speed(node);
+ if (priv->dwc3.maximum_speed < 0) {
+ error("Invalid usb maximum speed\n");
+ return priv->dwc3.maximum_speed;
+ }
+
+ return 0;
+}
+
+static int dwc3_omap_peripheral_ofdata_to_platdata(struct udevice *dev)
+{
+ struct omap_dwc3_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = dwc3_omap_ofdata_to_platdata(dev);
+ if (ret) {
+ error("platform dt parse error\n");
+ return ret;
+ }
+
+ priv->dwc3.dr_mode = USB_DR_MODE_PERIPHERAL;
+
+ return 0;
+}
+
+U_BOOT_DRIVER(dwc3_omap_peripheral) = {
+ .name = "dwc3-omap-peripheral",
+ .id = UCLASS_USB_DEV_GENERIC,
+ .ofdata_to_platdata = dwc3_omap_peripheral_ofdata_to_platdata,
+ .probe = dwc3_omap_peripheral_probe,
+ .remove = dwc3_omap_peripheral_remove,
+ .platdata_auto_alloc_size = sizeof(struct usb_platdata),
+ .priv_auto_alloc_size = sizeof(struct omap_dwc3_priv),
+ .flags = DM_FLAG_ALLOC_PRIV_DMA,
+};
+
static int ti_dwc3_wrapper_bind(struct udevice *parent)
{
const void *fdt = gd->fdt_blob;
int node;
+ int ret;
for (node = fdt_first_subnode(fdt, parent->of_offset); node > 0;
node = fdt_next_subnode(fdt, node)) {
const char *name = fdt_get_name(fdt, node, NULL);
enum usb_dr_mode dr_mode;
+ struct udevice *dev;
if (strncmp(name, "usb@", 4))
continue;
@@ -490,6 +648,13 @@ static int ti_dwc3_wrapper_bind(struct udevice *parent)
case USB_DR_MODE_PERIPHERAL:
case USB_DR_MODE_OTG:
/* Bind MUSB device */
+ ret = device_bind_driver_to_node(parent,
+ "dwc3-omap-peripheral",
+ name, node, &dev);
+ if (ret) {
+ error("dwc3 - not able to bind usb device node\n");
+ return ret;
+ }
break;
case USB_DR_MODE_HOST:
/* Bind MUSB host */
--
2.13.0
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