1 // SPDX-License-Identifier: GPL-2.0+
3 * Freescale QUICC Engine USB Host Controller Driver
5 * Copyright (c) Freescale Semicondutor, Inc. 2006.
8 * Copyright (c) Logic Product Development, Inc. 2007
10 * Copyright (c) MontaVista Software, Inc. 2008.
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/spinlock.h>
17 #include <linux/delay.h>
18 #include <linux/errno.h>
20 #include <linux/usb.h>
21 #include <linux/usb/hcd.h>
22 #include <linux/gpio.h>
23 #include <soc/fsl/qe/qe.h>
26 /* virtual root hub specific descriptor */
27 static u8 root_hub_des[] = {
29 USB_DT_HUB, /* bDescriptorType;hub-descriptor */
31 HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM, /* wHubCharacteristics */
32 0x00, /* per-port power, no overcurrent */
33 0x01, /* bPwrOn2pwrGood;2ms */
34 0x00, /* bHubContrCurrent;0mA */
35 0x00, /* DeviceRemoveable */
36 0xff, /* PortPwrCtrlMask */
39 static void fhci_gpio_set_value(struct fhci_hcd *fhci, int gpio_nr, bool on)
41 int gpio = fhci->gpios[gpio_nr];
42 bool alow = fhci->alow_gpios[gpio_nr];
44 if (!gpio_is_valid(gpio))
47 gpio_set_value(gpio, on ^ alow);
51 void fhci_config_transceiver(struct fhci_hcd *fhci,
52 enum fhci_port_status status)
54 fhci_dbg(fhci, "-> %s: %d\n", __func__, status);
57 case FHCI_PORT_POWER_OFF:
58 fhci_gpio_set_value(fhci, GPIO_POWER, false);
60 case FHCI_PORT_DISABLED:
61 case FHCI_PORT_WAITING:
62 fhci_gpio_set_value(fhci, GPIO_POWER, true);
65 fhci_gpio_set_value(fhci, GPIO_SPEED, false);
68 fhci_gpio_set_value(fhci, GPIO_SPEED, true);
75 fhci_dbg(fhci, "<- %s: %d\n", __func__, status);
78 /* disable the USB port by clearing the EN bit in the USBMOD register */
79 void fhci_port_disable(struct fhci_hcd *fhci)
81 struct fhci_usb *usb = (struct fhci_usb *)fhci->usb_lld;
82 enum fhci_port_status port_status;
84 fhci_dbg(fhci, "-> %s\n", __func__);
86 fhci_stop_sof_timer(fhci);
88 fhci_flush_all_transmissions(usb);
90 fhci_usb_disable_interrupt((struct fhci_usb *)fhci->usb_lld);
91 port_status = usb->port_status;
92 usb->port_status = FHCI_PORT_DISABLED;
94 /* Enable IDLE since we want to know if something comes along */
95 usb->saved_msk |= USB_E_IDLE_MASK;
96 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
98 /* check if during the disconnection process attached new device */
99 if (port_status == FHCI_PORT_WAITING)
100 fhci_device_connected_interrupt(fhci);
101 usb->vroot_hub->port.wPortStatus &= ~USB_PORT_STAT_ENABLE;
102 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_ENABLE;
103 fhci_usb_enable_interrupt((struct fhci_usb *)fhci->usb_lld);
105 fhci_dbg(fhci, "<- %s\n", __func__);
108 /* enable the USB port by setting the EN bit in the USBMOD register */
109 void fhci_port_enable(void *lld)
111 struct fhci_usb *usb = (struct fhci_usb *)lld;
112 struct fhci_hcd *fhci = usb->fhci;
114 fhci_dbg(fhci, "-> %s\n", __func__);
116 fhci_config_transceiver(fhci, usb->port_status);
118 if ((usb->port_status != FHCI_PORT_FULL) &&
119 (usb->port_status != FHCI_PORT_LOW))
120 fhci_start_sof_timer(fhci);
122 usb->vroot_hub->port.wPortStatus |= USB_PORT_STAT_ENABLE;
123 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_ENABLE;
125 fhci_dbg(fhci, "<- %s\n", __func__);
128 void fhci_io_port_generate_reset(struct fhci_hcd *fhci)
130 fhci_dbg(fhci, "-> %s\n", __func__);
132 gpio_direction_output(fhci->gpios[GPIO_USBOE], 0);
133 gpio_direction_output(fhci->gpios[GPIO_USBTP], 0);
134 gpio_direction_output(fhci->gpios[GPIO_USBTN], 0);
138 qe_pin_set_dedicated(fhci->pins[PIN_USBOE]);
139 qe_pin_set_dedicated(fhci->pins[PIN_USBTP]);
140 qe_pin_set_dedicated(fhci->pins[PIN_USBTN]);
142 fhci_dbg(fhci, "<- %s\n", __func__);
145 /* generate the RESET condition on the bus */
146 void fhci_port_reset(void *lld)
148 struct fhci_usb *usb = (struct fhci_usb *)lld;
149 struct fhci_hcd *fhci = usb->fhci;
153 fhci_dbg(fhci, "-> %s\n", __func__);
155 fhci_stop_sof_timer(fhci);
156 /* disable the USB controller */
157 mode = in_8(&fhci->regs->usb_usmod);
158 out_8(&fhci->regs->usb_usmod, mode & (~USB_MODE_EN));
160 /* disable idle interrupts */
161 mask = in_be16(&fhci->regs->usb_usbmr);
162 out_be16(&fhci->regs->usb_usbmr, mask & (~USB_E_IDLE_MASK));
164 fhci_io_port_generate_reset(fhci);
166 /* enable interrupt on this endpoint */
167 out_be16(&fhci->regs->usb_usbmr, mask);
169 /* enable the USB controller */
170 mode = in_8(&fhci->regs->usb_usmod);
171 out_8(&fhci->regs->usb_usmod, mode | USB_MODE_EN);
172 fhci_start_sof_timer(fhci);
174 fhci_dbg(fhci, "<- %s\n", __func__);
177 int fhci_hub_status_data(struct usb_hcd *hcd, char *buf)
179 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
183 fhci_dbg(fhci, "-> %s\n", __func__);
185 spin_lock_irqsave(&fhci->lock, flags);
187 if (fhci->vroot_hub->port.wPortChange & (USB_PORT_STAT_C_CONNECTION |
188 USB_PORT_STAT_C_ENABLE | USB_PORT_STAT_C_SUSPEND |
189 USB_PORT_STAT_C_RESET | USB_PORT_STAT_C_OVERCURRENT)) {
192 fhci_dbg(fhci, "-- %s\n", __func__);
195 spin_unlock_irqrestore(&fhci->lock, flags);
197 fhci_dbg(fhci, "<- %s\n", __func__);
202 int fhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
203 u16 wIndex, char *buf, u16 wLength)
205 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
207 struct usb_hub_status *hub_status;
208 struct usb_port_status *port_status;
211 spin_lock_irqsave(&fhci->lock, flags);
213 fhci_dbg(fhci, "-> %s\n", __func__);
216 case ClearHubFeature:
218 case C_HUB_LOCAL_POWER:
219 case C_HUB_OVER_CURRENT:
225 case ClearPortFeature:
226 fhci->vroot_hub->feature &= (1 << wValue);
229 case USB_PORT_FEAT_ENABLE:
230 fhci->vroot_hub->port.wPortStatus &=
231 ~USB_PORT_STAT_ENABLE;
232 fhci_port_disable(fhci);
234 case USB_PORT_FEAT_C_ENABLE:
235 fhci->vroot_hub->port.wPortChange &=
236 ~USB_PORT_STAT_C_ENABLE;
238 case USB_PORT_FEAT_SUSPEND:
239 fhci->vroot_hub->port.wPortStatus &=
240 ~USB_PORT_STAT_SUSPEND;
241 fhci_stop_sof_timer(fhci);
243 case USB_PORT_FEAT_C_SUSPEND:
244 fhci->vroot_hub->port.wPortChange &=
245 ~USB_PORT_STAT_C_SUSPEND;
247 case USB_PORT_FEAT_POWER:
248 fhci->vroot_hub->port.wPortStatus &=
249 ~USB_PORT_STAT_POWER;
250 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
252 case USB_PORT_FEAT_C_CONNECTION:
253 fhci->vroot_hub->port.wPortChange &=
254 ~USB_PORT_STAT_C_CONNECTION;
256 case USB_PORT_FEAT_C_OVER_CURRENT:
257 fhci->vroot_hub->port.wPortChange &=
258 ~USB_PORT_STAT_C_OVERCURRENT;
260 case USB_PORT_FEAT_C_RESET:
261 fhci->vroot_hub->port.wPortChange &=
262 ~USB_PORT_STAT_C_RESET;
268 case GetHubDescriptor:
269 memcpy(buf, root_hub_des, sizeof(root_hub_des));
272 hub_status = (struct usb_hub_status *)buf;
273 hub_status->wHubStatus =
274 cpu_to_le16(fhci->vroot_hub->hub.wHubStatus);
275 hub_status->wHubChange =
276 cpu_to_le16(fhci->vroot_hub->hub.wHubChange);
279 port_status = (struct usb_port_status *)buf;
280 port_status->wPortStatus =
281 cpu_to_le16(fhci->vroot_hub->port.wPortStatus);
282 port_status->wPortChange =
283 cpu_to_le16(fhci->vroot_hub->port.wPortChange);
287 case C_HUB_OVER_CURRENT:
288 case C_HUB_LOCAL_POWER:
295 fhci->vroot_hub->feature |= (1 << wValue);
298 case USB_PORT_FEAT_ENABLE:
299 fhci->vroot_hub->port.wPortStatus |=
300 USB_PORT_STAT_ENABLE;
301 fhci_port_enable(fhci->usb_lld);
303 case USB_PORT_FEAT_SUSPEND:
304 fhci->vroot_hub->port.wPortStatus |=
305 USB_PORT_STAT_SUSPEND;
306 fhci_stop_sof_timer(fhci);
308 case USB_PORT_FEAT_RESET:
309 fhci->vroot_hub->port.wPortStatus |=
311 fhci_port_reset(fhci->usb_lld);
312 fhci->vroot_hub->port.wPortStatus |=
313 USB_PORT_STAT_ENABLE;
314 fhci->vroot_hub->port.wPortStatus &=
315 ~USB_PORT_STAT_RESET;
317 case USB_PORT_FEAT_POWER:
318 fhci->vroot_hub->port.wPortStatus |=
320 fhci_config_transceiver(fhci, FHCI_PORT_WAITING);
331 fhci_dbg(fhci, "<- %s\n", __func__);
333 spin_unlock_irqrestore(&fhci->lock, flags);