diff options
Diffstat (limited to 'drivers/usb/dwc3/dwc3-uniphier.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-uniphier.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-uniphier.c b/drivers/usb/dwc3/dwc3-uniphier.c new file mode 100644 index 00000000000..ab85428a700 --- /dev/null +++ b/drivers/usb/dwc3/dwc3-uniphier.c @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * UniPhier Specific Glue Layer for DWC3 + * + * Copyright (C) 2016-2017 Socionext Inc. + * Author: Masahiro Yamada <yamada.masahiro@socionext.com> + * Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> + */ + +#include <dm.h> +#include <dm/lists.h> +#include <linux/bitops.h> +#include <linux/usb/gadget.h> + +#include "core.h" +#include "gadget.h" +#include "dwc3-generic.h" + +#define UNIPHIER_PRO4_DWC3_RESET 0x40 +#define UNIPHIER_PRO4_DWC3_RESET_XIOMMU BIT(5) +#define UNIPHIER_PRO4_DWC3_RESET_XLINK BIT(4) +#define UNIPHIER_PRO4_DWC3_RESET_PHY_SS BIT(2) + +#define UNIPHIER_PRO5_DWC3_RESET 0x00 +#define UNIPHIER_PRO5_DWC3_RESET_PHY_S1 BIT(17) +#define UNIPHIER_PRO5_DWC3_RESET_PHY_S0 BIT(16) +#define UNIPHIER_PRO5_DWC3_RESET_XLINK BIT(15) +#define UNIPHIER_PRO5_DWC3_RESET_XIOMMU BIT(14) + +#define UNIPHIER_PXS2_DWC3_RESET 0x00 +#define UNIPHIER_PXS2_DWC3_RESET_XLINK BIT(15) + +static void uniphier_pro4_dwc3_init(struct udevice *dev, int index, + enum usb_dr_mode mode) +{ + struct dwc3_glue_data *glue = dev_get_plat(dev); + void *regs = map_physmem(glue->regs, glue->size, MAP_NOCACHE); + u32 tmp; + + tmp = readl(regs + UNIPHIER_PRO4_DWC3_RESET); + tmp &= ~UNIPHIER_PRO4_DWC3_RESET_PHY_SS; + tmp |= UNIPHIER_PRO4_DWC3_RESET_XIOMMU | UNIPHIER_PRO4_DWC3_RESET_XLINK; + writel(tmp, regs + UNIPHIER_PRO4_DWC3_RESET); + + unmap_physmem(regs, MAP_NOCACHE); +} + +static void uniphier_pro5_dwc3_init(struct udevice *dev, int index, + enum usb_dr_mode mode) +{ + struct dwc3_glue_data *glue = dev_get_plat(dev); + void *regs = map_physmem(glue->regs, glue->size, MAP_NOCACHE); + u32 tmp; + + tmp = readl(regs + UNIPHIER_PRO5_DWC3_RESET); + tmp &= ~(UNIPHIER_PRO5_DWC3_RESET_PHY_S1 | + UNIPHIER_PRO5_DWC3_RESET_PHY_S0); + tmp |= UNIPHIER_PRO5_DWC3_RESET_XLINK | UNIPHIER_PRO5_DWC3_RESET_XIOMMU; + writel(tmp, regs + UNIPHIER_PRO5_DWC3_RESET); + + unmap_physmem(regs, MAP_NOCACHE); +} + +static void uniphier_pxs2_dwc3_init(struct udevice *dev, int index, + enum usb_dr_mode mode) +{ + struct dwc3_glue_data *glue = dev_get_plat(dev); + void *regs = map_physmem(glue->regs, glue->size, MAP_NOCACHE); + u32 tmp; + + tmp = readl(regs + UNIPHIER_PXS2_DWC3_RESET); + tmp |= UNIPHIER_PXS2_DWC3_RESET_XLINK; + writel(tmp, regs + UNIPHIER_PXS2_DWC3_RESET); + + unmap_physmem(regs, MAP_NOCACHE); +} + +static int dwc3_uniphier_glue_get_ctrl_dev(struct udevice *dev, ofnode *node) +{ + struct udevice *child; + const char *name; + ofnode subnode; + + /* + * "controller reset" belongs to glue logic, and it should be + * accessible in .glue_configure() before access to the controller + * begins. + */ + ofnode_for_each_subnode(subnode, dev_ofnode(dev)) { + name = ofnode_get_name(subnode); + if (!strncmp(name, "reset", 5)) + device_bind_driver_to_node(dev, "uniphier-reset", + name, subnode, &child); + } + + /* Get controller node that is placed separately from the glue node */ + *node = ofnode_by_compatible(dev_ofnode(dev->parent), + "socionext,uniphier-dwc3"); + + return 0; +} + +static const struct dwc3_glue_ops uniphier_pro4_dwc3_ops = { + .glue_get_ctrl_dev = dwc3_uniphier_glue_get_ctrl_dev, + .glue_configure = uniphier_pro4_dwc3_init, +}; + +static const struct dwc3_glue_ops uniphier_pro5_dwc3_ops = { + .glue_get_ctrl_dev = dwc3_uniphier_glue_get_ctrl_dev, + .glue_configure = uniphier_pro5_dwc3_init, +}; + +static const struct dwc3_glue_ops uniphier_pxs2_dwc3_ops = { + .glue_get_ctrl_dev = dwc3_uniphier_glue_get_ctrl_dev, + .glue_configure = uniphier_pxs2_dwc3_init, +}; + +static const struct udevice_id uniphier_dwc3_match[] = { + { + .compatible = "socionext,uniphier-pro4-dwc3-glue", + .data = (ulong)&uniphier_pro4_dwc3_ops, + }, + { + .compatible = "socionext,uniphier-pro5-dwc3-glue", + .data = (ulong)&uniphier_pro5_dwc3_ops, + }, + { + .compatible = "socionext,uniphier-pxs2-dwc3-glue", + .data = (ulong)&uniphier_pxs2_dwc3_ops, + }, + { + .compatible = "socionext,uniphier-ld20-dwc3-glue", + .data = (ulong)&uniphier_pxs2_dwc3_ops, + }, + { + .compatible = "socionext,uniphier-pxs3-dwc3-glue", + .data = (ulong)&uniphier_pxs2_dwc3_ops, + }, + { + .compatible = "socionext,uniphier-nx1-dwc3-glue", + .data = (ulong)&uniphier_pxs2_dwc3_ops, + }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(dwc3_uniphier_wrapper) = { + .name = "uniphier-dwc3", + .id = UCLASS_SIMPLE_BUS, + .of_match = uniphier_dwc3_match, + .bind = dwc3_glue_bind, + .probe = dwc3_glue_probe, + .remove = dwc3_glue_remove, + .plat_auto = sizeof(struct dwc3_glue_data), +}; |