1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Freescale QUICC Engine USB Host Controller Driver
4 *
5 * Copyright (c) Freescale Semicondutor, Inc. 2006.
6 * Shlomi Gridish <gridish@freescale.com>
7 * Jerry Huang <Chang-Ming.Huang@freescale.com>
8 * Copyright (c) Logic Product Development, Inc. 2007
9 * Peter Barada <peterb@logicpd.com>
10 * Copyright (c) MontaVista Software, Inc. 2008.
11 * Anton Vorontsov <avorontsov@ru.mvista.com>
12 */
13
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>
19 #include <linux/io.h>
20 #include <linux/usb.h>
21 #include <linux/usb/hcd.h>
22 #include <linux/gpio.h>
23 #include <soc/fsl/qe/qe.h>
24 #include "fhci.h"
25
26 /* virtual root hub specific descriptor */
27 static u8 root_hub_des[] = {
28 0x09, /* blength */
29 USB_DT_HUB, /* bDescriptorType;hub-descriptor */
30 0x01, /* bNbrPorts */
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 */
37 };
38
fhci_gpio_set_value(struct fhci_hcd * fhci,int gpio_nr,bool on)39 static void fhci_gpio_set_value(struct fhci_hcd *fhci, int gpio_nr, bool on)
40 {
41 int gpio = fhci->gpios[gpio_nr];
42 bool alow = fhci->alow_gpios[gpio_nr];
43
44 if (!gpio_is_valid(gpio))
45 return;
46
47 gpio_set_value(gpio, on ^ alow);
48 mdelay(5);
49 }
50
fhci_config_transceiver(struct fhci_hcd * fhci,enum fhci_port_status status)51 void fhci_config_transceiver(struct fhci_hcd *fhci,
52 enum fhci_port_status status)
53 {
54 fhci_dbg(fhci, "-> %s: %d\n", __func__, status);
55
56 switch (status) {
57 case FHCI_PORT_POWER_OFF:
58 fhci_gpio_set_value(fhci, GPIO_POWER, false);
59 break;
60 case FHCI_PORT_DISABLED:
61 case FHCI_PORT_WAITING:
62 fhci_gpio_set_value(fhci, GPIO_POWER, true);
63 break;
64 case FHCI_PORT_LOW:
65 fhci_gpio_set_value(fhci, GPIO_SPEED, false);
66 break;
67 case FHCI_PORT_FULL:
68 fhci_gpio_set_value(fhci, GPIO_SPEED, true);
69 break;
70 default:
71 WARN_ON(1);
72 break;
73 }
74
75 fhci_dbg(fhci, "<- %s: %d\n", __func__, status);
76 }
77
78 /* disable the USB port by clearing the EN bit in the USBMOD register */
fhci_port_disable(struct fhci_hcd * fhci)79 void fhci_port_disable(struct fhci_hcd *fhci)
80 {
81 struct fhci_usb *usb = (struct fhci_usb *)fhci->usb_lld;
82 enum fhci_port_status port_status;
83
84 fhci_dbg(fhci, "-> %s\n", __func__);
85
86 fhci_stop_sof_timer(fhci);
87
88 fhci_flush_all_transmissions(usb);
89
90 fhci_usb_disable_interrupt((struct fhci_usb *)fhci->usb_lld);
91 port_status = usb->port_status;
92 usb->port_status = FHCI_PORT_DISABLED;
93
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);
97
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);
104
105 fhci_dbg(fhci, "<- %s\n", __func__);
106 }
107
108 /* enable the USB port by setting the EN bit in the USBMOD register */
fhci_port_enable(void * lld)109 void fhci_port_enable(void *lld)
110 {
111 struct fhci_usb *usb = (struct fhci_usb *)lld;
112 struct fhci_hcd *fhci = usb->fhci;
113
114 fhci_dbg(fhci, "-> %s\n", __func__);
115
116 fhci_config_transceiver(fhci, usb->port_status);
117
118 if ((usb->port_status != FHCI_PORT_FULL) &&
119 (usb->port_status != FHCI_PORT_LOW))
120 fhci_start_sof_timer(fhci);
121
122 usb->vroot_hub->port.wPortStatus |= USB_PORT_STAT_ENABLE;
123 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_ENABLE;
124
125 fhci_dbg(fhci, "<- %s\n", __func__);
126 }
127
fhci_io_port_generate_reset(struct fhci_hcd * fhci)128 void fhci_io_port_generate_reset(struct fhci_hcd *fhci)
129 {
130 fhci_dbg(fhci, "-> %s\n", __func__);
131
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);
135
136 mdelay(5);
137
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]);
141
142 fhci_dbg(fhci, "<- %s\n", __func__);
143 }
144
145 /* generate the RESET condition on the bus */
fhci_port_reset(void * lld)146 void fhci_port_reset(void *lld)
147 {
148 struct fhci_usb *usb = (struct fhci_usb *)lld;
149 struct fhci_hcd *fhci = usb->fhci;
150 u8 mode;
151 u16 mask;
152
153 fhci_dbg(fhci, "-> %s\n", __func__);
154
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));
159
160 /* disable idle interrupts */
161 mask = in_be16(&fhci->regs->usb_usbmr);
162 out_be16(&fhci->regs->usb_usbmr, mask & (~USB_E_IDLE_MASK));
163
164 fhci_io_port_generate_reset(fhci);
165
166 /* enable interrupt on this endpoint */
167 out_be16(&fhci->regs->usb_usbmr, mask);
168
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);
173
174 fhci_dbg(fhci, "<- %s\n", __func__);
175 }
176
fhci_hub_status_data(struct usb_hcd * hcd,char * buf)177 int fhci_hub_status_data(struct usb_hcd *hcd, char *buf)
178 {
179 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
180 int ret = 0;
181 unsigned long flags;
182
183 fhci_dbg(fhci, "-> %s\n", __func__);
184
185 spin_lock_irqsave(&fhci->lock, flags);
186
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)) {
190 *buf = 1 << 1;
191 ret = 1;
192 fhci_dbg(fhci, "-- %s\n", __func__);
193 }
194
195 spin_unlock_irqrestore(&fhci->lock, flags);
196
197 fhci_dbg(fhci, "<- %s\n", __func__);
198
199 return ret;
200 }
201
fhci_hub_control(struct usb_hcd * hcd,u16 typeReq,u16 wValue,u16 wIndex,char * buf,u16 wLength)202 int fhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
203 u16 wIndex, char *buf, u16 wLength)
204 {
205 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
206 int retval = 0;
207 struct usb_hub_status *hub_status;
208 struct usb_port_status *port_status;
209 unsigned long flags;
210
211 spin_lock_irqsave(&fhci->lock, flags);
212
213 fhci_dbg(fhci, "-> %s\n", __func__);
214
215 switch (typeReq) {
216 case ClearHubFeature:
217 switch (wValue) {
218 case C_HUB_LOCAL_POWER:
219 case C_HUB_OVER_CURRENT:
220 break;
221 default:
222 goto error;
223 }
224 break;
225 case ClearPortFeature:
226 fhci->vroot_hub->feature &= (1 << wValue);
227
228 switch (wValue) {
229 case USB_PORT_FEAT_ENABLE:
230 fhci->vroot_hub->port.wPortStatus &=
231 ~USB_PORT_STAT_ENABLE;
232 fhci_port_disable(fhci);
233 break;
234 case USB_PORT_FEAT_C_ENABLE:
235 fhci->vroot_hub->port.wPortChange &=
236 ~USB_PORT_STAT_C_ENABLE;
237 break;
238 case USB_PORT_FEAT_SUSPEND:
239 fhci->vroot_hub->port.wPortStatus &=
240 ~USB_PORT_STAT_SUSPEND;
241 fhci_stop_sof_timer(fhci);
242 break;
243 case USB_PORT_FEAT_C_SUSPEND:
244 fhci->vroot_hub->port.wPortChange &=
245 ~USB_PORT_STAT_C_SUSPEND;
246 break;
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);
251 break;
252 case USB_PORT_FEAT_C_CONNECTION:
253 fhci->vroot_hub->port.wPortChange &=
254 ~USB_PORT_STAT_C_CONNECTION;
255 break;
256 case USB_PORT_FEAT_C_OVER_CURRENT:
257 fhci->vroot_hub->port.wPortChange &=
258 ~USB_PORT_STAT_C_OVERCURRENT;
259 break;
260 case USB_PORT_FEAT_C_RESET:
261 fhci->vroot_hub->port.wPortChange &=
262 ~USB_PORT_STAT_C_RESET;
263 break;
264 default:
265 goto error;
266 }
267 break;
268 case GetHubDescriptor:
269 memcpy(buf, root_hub_des, sizeof(root_hub_des));
270 break;
271 case GetHubStatus:
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);
277 break;
278 case GetPortStatus:
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);
284 break;
285 case SetHubFeature:
286 switch (wValue) {
287 case C_HUB_OVER_CURRENT:
288 case C_HUB_LOCAL_POWER:
289 break;
290 default:
291 goto error;
292 }
293 break;
294 case SetPortFeature:
295 fhci->vroot_hub->feature |= (1 << wValue);
296
297 switch (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);
302 break;
303 case USB_PORT_FEAT_SUSPEND:
304 fhci->vroot_hub->port.wPortStatus |=
305 USB_PORT_STAT_SUSPEND;
306 fhci_stop_sof_timer(fhci);
307 break;
308 case USB_PORT_FEAT_RESET:
309 fhci->vroot_hub->port.wPortStatus |=
310 USB_PORT_STAT_RESET;
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;
316 break;
317 case USB_PORT_FEAT_POWER:
318 fhci->vroot_hub->port.wPortStatus |=
319 USB_PORT_STAT_POWER;
320 fhci_config_transceiver(fhci, FHCI_PORT_WAITING);
321 break;
322 default:
323 goto error;
324 }
325 break;
326 default:
327 error:
328 retval = -EPIPE;
329 }
330
331 fhci_dbg(fhci, "<- %s\n", __func__);
332
333 spin_unlock_irqrestore(&fhci->lock, flags);
334
335 return retval;
336 }
337