Patrick Delaunay | 22929e1 | 2018-10-26 09:02:52 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 2 | /* |
| 3 | * Generic DWC3 Glue layer |
| 4 | * |
| 5 | * Copyright (C) 2016 - 2018 Xilinx, Inc. |
| 6 | * |
| 7 | * Based on dwc3-omap.c. |
| 8 | */ |
| 9 | |
| 10 | #include <common.h> |
| 11 | #include <dm.h> |
| 12 | #include <dm/device-internal.h> |
| 13 | #include <dm/lists.h> |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 14 | #include <dwc3-uboot.h> |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 15 | #include <linux/usb/ch9.h> |
| 16 | #include <linux/usb/gadget.h> |
| 17 | #include <malloc.h> |
| 18 | #include <usb.h> |
| 19 | #include "core.h" |
| 20 | #include "gadget.h" |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 21 | #include <reset.h> |
| 22 | #include <clk.h> |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 23 | |
Jean-Jacques Hiblot | 687ab54 | 2018-11-29 10:52:42 +0100 | [diff] [blame] | 24 | #if CONFIG_IS_ENABLED(DM_USB_GADGET) |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 25 | struct dwc3_generic_peripheral { |
| 26 | struct dwc3 dwc3; |
| 27 | struct phy *phys; |
| 28 | int num_phys; |
| 29 | fdt_addr_t base; |
| 30 | }; |
| 31 | |
Jean-Jacques Hiblot | ff8d755 | 2018-11-29 10:52:43 +0100 | [diff] [blame] | 32 | int dm_usb_gadget_handle_interrupts(struct udevice *dev) |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 33 | { |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 34 | struct dwc3_generic_peripheral *priv = dev_get_priv(dev); |
| 35 | struct dwc3 *dwc3 = &priv->dwc3; |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 36 | |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 37 | dwc3_gadget_uboot_handle_interrupt(dwc3); |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 38 | |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | static int dwc3_generic_peripheral_probe(struct udevice *dev) |
| 43 | { |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 44 | int rc; |
| 45 | struct dwc3_generic_peripheral *priv = dev_get_priv(dev); |
| 46 | struct dwc3 *dwc3 = &priv->dwc3; |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 47 | |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 48 | rc = dwc3_setup_phy(dev, &priv->phys, &priv->num_phys); |
| 49 | if (rc) |
| 50 | return rc; |
| 51 | |
| 52 | dwc3->regs = map_physmem(priv->base, DWC3_OTG_REGS_END, MAP_NOCACHE); |
| 53 | dwc3->regs += DWC3_GLOBALS_REGS_START; |
| 54 | dwc3->dev = dev; |
| 55 | |
| 56 | rc = dwc3_init(dwc3); |
| 57 | if (rc) { |
| 58 | unmap_physmem(dwc3->regs, MAP_NOCACHE); |
| 59 | return rc; |
| 60 | } |
| 61 | |
| 62 | return 0; |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | static int dwc3_generic_peripheral_remove(struct udevice *dev) |
| 66 | { |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 67 | struct dwc3_generic_peripheral *priv = dev_get_priv(dev); |
| 68 | struct dwc3 *dwc3 = &priv->dwc3; |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 69 | |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 70 | dwc3_remove(dwc3); |
| 71 | dwc3_shutdown_phy(dev, priv->phys, priv->num_phys); |
| 72 | unmap_physmem(dwc3->regs, MAP_NOCACHE); |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static int dwc3_generic_peripheral_ofdata_to_platdata(struct udevice *dev) |
| 78 | { |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 79 | struct dwc3_generic_peripheral *priv = dev_get_priv(dev); |
| 80 | struct dwc3 *dwc3 = &priv->dwc3; |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 81 | int node = dev_of_offset(dev); |
| 82 | |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 83 | priv->base = devfdt_get_addr(dev); |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 84 | |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 85 | dwc3->maximum_speed = usb_get_maximum_speed(node); |
| 86 | if (dwc3->maximum_speed == USB_SPEED_UNKNOWN) { |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 87 | pr_err("Invalid usb maximum speed\n"); |
| 88 | return -ENODEV; |
| 89 | } |
| 90 | |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 91 | dwc3->dr_mode = usb_get_dr_mode(node); |
| 92 | if (dwc3->dr_mode == USB_DR_MODE_UNKNOWN) { |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 93 | pr_err("Invalid usb mode setup\n"); |
| 94 | return -ENODEV; |
| 95 | } |
| 96 | |
| 97 | return 0; |
| 98 | } |
| 99 | |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 100 | U_BOOT_DRIVER(dwc3_generic_peripheral) = { |
| 101 | .name = "dwc3-generic-peripheral", |
Jean-Jacques Hiblot | 0131162 | 2018-11-29 10:52:46 +0100 | [diff] [blame] | 102 | .id = UCLASS_USB_GADGET_GENERIC, |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 103 | .ofdata_to_platdata = dwc3_generic_peripheral_ofdata_to_platdata, |
| 104 | .probe = dwc3_generic_peripheral_probe, |
| 105 | .remove = dwc3_generic_peripheral_remove, |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 106 | .priv_auto_alloc_size = sizeof(struct dwc3_generic_peripheral), |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 107 | }; |
Jean-Jacques Hiblot | 687ab54 | 2018-11-29 10:52:42 +0100 | [diff] [blame] | 108 | #endif |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 109 | |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 110 | struct dwc3_glue_data { |
| 111 | struct clk_bulk clks; |
| 112 | struct reset_ctl_bulk resets; |
| 113 | }; |
| 114 | |
| 115 | static int dwc3_glue_bind(struct udevice *parent) |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 116 | { |
| 117 | const void *fdt = gd->fdt_blob; |
| 118 | int node; |
| 119 | int ret; |
| 120 | |
| 121 | for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0; |
| 122 | node = fdt_next_subnode(fdt, node)) { |
| 123 | const char *name = fdt_get_name(fdt, node, NULL); |
| 124 | enum usb_dr_mode dr_mode; |
| 125 | struct udevice *dev; |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 126 | const char *driver = NULL; |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 127 | |
| 128 | debug("%s: subnode name: %s\n", __func__, name); |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 129 | |
| 130 | dr_mode = usb_get_dr_mode(node); |
| 131 | |
| 132 | switch (dr_mode) { |
| 133 | case USB_DR_MODE_PERIPHERAL: |
| 134 | case USB_DR_MODE_OTG: |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 135 | #if CONFIG_IS_ENABLED(DM_USB_GADGET) |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 136 | debug("%s: dr_mode: OTG or Peripheral\n", __func__); |
| 137 | driver = "dwc3-generic-peripheral"; |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 138 | #endif |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 139 | break; |
| 140 | case USB_DR_MODE_HOST: |
| 141 | debug("%s: dr_mode: HOST\n", __func__); |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 142 | driver = "xhci-dwc3"; |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 143 | break; |
| 144 | default: |
| 145 | debug("%s: unsupported dr_mode\n", __func__); |
| 146 | return -ENODEV; |
| 147 | }; |
| 148 | |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 149 | if (!driver) |
| 150 | continue; |
| 151 | |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 152 | ret = device_bind_driver_to_node(parent, driver, name, |
| 153 | offset_to_ofnode(node), &dev); |
| 154 | if (ret) { |
| 155 | debug("%s: not able to bind usb device mode\n", |
| 156 | __func__); |
| 157 | return ret; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 164 | static int dwc3_glue_reset_init(struct udevice *dev, |
| 165 | struct dwc3_glue_data *glue) |
| 166 | { |
| 167 | int ret; |
| 168 | |
| 169 | ret = reset_get_bulk(dev, &glue->resets); |
| 170 | if (ret == -ENOTSUPP) |
| 171 | return 0; |
| 172 | else if (ret) |
| 173 | return ret; |
| 174 | |
| 175 | ret = reset_deassert_bulk(&glue->resets); |
| 176 | if (ret) { |
| 177 | reset_release_bulk(&glue->resets); |
| 178 | return ret; |
| 179 | } |
| 180 | |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | static int dwc3_glue_clk_init(struct udevice *dev, |
| 185 | struct dwc3_glue_data *glue) |
| 186 | { |
| 187 | int ret; |
| 188 | |
| 189 | ret = clk_get_bulk(dev, &glue->clks); |
| 190 | if (ret == -ENOSYS) |
| 191 | return 0; |
| 192 | if (ret) |
| 193 | return ret; |
| 194 | |
| 195 | #if CONFIG_IS_ENABLED(CLK) |
| 196 | ret = clk_enable_bulk(&glue->clks); |
| 197 | if (ret) { |
| 198 | clk_release_bulk(&glue->clks); |
| 199 | return ret; |
| 200 | } |
| 201 | #endif |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static int dwc3_glue_probe(struct udevice *dev) |
| 207 | { |
| 208 | struct dwc3_glue_data *glue = dev_get_platdata(dev); |
| 209 | int ret; |
| 210 | |
| 211 | ret = dwc3_glue_clk_init(dev, glue); |
| 212 | if (ret) |
| 213 | return ret; |
| 214 | |
| 215 | ret = dwc3_glue_reset_init(dev, glue); |
| 216 | if (ret) |
| 217 | return ret; |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | static int dwc3_glue_remove(struct udevice *dev) |
| 223 | { |
| 224 | struct dwc3_glue_data *glue = dev_get_platdata(dev); |
| 225 | |
| 226 | reset_release_bulk(&glue->resets); |
| 227 | |
| 228 | clk_release_bulk(&glue->clks); |
| 229 | |
| 230 | return dm_scan_fdt_dev(dev); |
| 231 | } |
| 232 | |
| 233 | static const struct udevice_id dwc3_glue_ids[] = { |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 234 | { .compatible = "xlnx,zynqmp-dwc3" }, |
| 235 | { } |
| 236 | }; |
| 237 | |
| 238 | U_BOOT_DRIVER(dwc3_generic_wrapper) = { |
| 239 | .name = "dwc3-generic-wrapper", |
| 240 | .id = UCLASS_MISC, |
Jean-Jacques Hiblot | 446e3a2 | 2018-11-29 10:52:48 +0100 | [diff] [blame^] | 241 | .of_match = dwc3_glue_ids, |
| 242 | .bind = dwc3_glue_bind, |
| 243 | .probe = dwc3_glue_probe, |
| 244 | .remove = dwc3_glue_remove, |
| 245 | .platdata_auto_alloc_size = sizeof(struct dwc3_glue_data), |
| 246 | |
Michal Simek | 49d6745 | 2018-05-18 13:15:06 +0200 | [diff] [blame] | 247 | }; |