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path: root/drivers/usb/host/fhci-hub.c
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Diffstat (limited to 'drivers/usb/host/fhci-hub.c')
-rw-r--r--drivers/usb/host/fhci-hub.c345
1 files changed, 345 insertions, 0 deletions
diff --git a/drivers/usb/host/fhci-hub.c b/drivers/usb/host/fhci-hub.c
new file mode 100644
index 000000000000..0cfaedc3e124
--- /dev/null
+++ b/drivers/usb/host/fhci-hub.c
@@ -0,0 +1,345 @@
1/*
2 * Freescale QUICC Engine USB Host Controller Driver
3 *
4 * Copyright (c) Freescale Semicondutor, Inc. 2006.
5 * Shlomi Gridish <gridish@freescale.com>
6 * Jerry Huang <Chang-Ming.Huang@freescale.com>
7 * Copyright (c) Logic Product Development, Inc. 2007
8 * Peter Barada <peterb@logicpd.com>
9 * Copyright (c) MontaVista Software, Inc. 2008.
10 * Anton Vorontsov <avorontsov@ru.mvista.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 */
17
18#include <linux/kernel.h>
19#include <linux/types.h>
20#include <linux/spinlock.h>
21#include <linux/delay.h>
22#include <linux/errno.h>
23#include <linux/io.h>
24#include <linux/usb.h>
25#include <linux/gpio.h>
26#include <asm/qe.h>
27#include "../core/hcd.h"
28#include "fhci.h"
29
30/* virtual root hub specific descriptor */
31static u8 root_hub_des[] = {
32 0x09, /* blength */
33 0x29, /* bDescriptorType;hub-descriptor */
34 0x01, /* bNbrPorts */
35 0x00, /* wHubCharacteristics */
36 0x00,
37 0x01, /* bPwrOn2pwrGood;2ms */
38 0x00, /* bHubContrCurrent;0mA */
39 0x00, /* DeviceRemoveable */
40 0xff, /* PortPwrCtrlMask */
41};
42
43static void fhci_gpio_set_value(struct fhci_hcd *fhci, int gpio_nr, bool on)
44{
45 int gpio = fhci->gpios[gpio_nr];
46 bool alow = fhci->alow_gpios[gpio_nr];
47
48 if (!gpio_is_valid(gpio))
49 return;
50
51 gpio_set_value(gpio, on ^ alow);
52 mdelay(5);
53}
54
55void fhci_config_transceiver(struct fhci_hcd *fhci,
56 enum fhci_port_status status)
57{
58 fhci_dbg(fhci, "-> %s: %d\n", __func__, status);
59
60 switch (status) {
61 case FHCI_PORT_POWER_OFF:
62 fhci_gpio_set_value(fhci, GPIO_POWER, false);
63 break;
64 case FHCI_PORT_DISABLED:
65 case FHCI_PORT_WAITING:
66 fhci_gpio_set_value(fhci, GPIO_POWER, true);
67 break;
68 case FHCI_PORT_LOW:
69 fhci_gpio_set_value(fhci, GPIO_SPEED, false);
70 break;
71 case FHCI_PORT_FULL:
72 fhci_gpio_set_value(fhci, GPIO_SPEED, true);
73 break;
74 default:
75 WARN_ON(1);
76 break;
77 }
78
79 fhci_dbg(fhci, "<- %s: %d\n", __func__, status);
80}
81
82/* disable the USB port by clearing the EN bit in the USBMOD register */
83void fhci_port_disable(struct fhci_hcd *fhci)
84{
85 struct fhci_usb *usb = (struct fhci_usb *)fhci->usb_lld;
86 enum fhci_port_status port_status;
87
88 fhci_dbg(fhci, "-> %s\n", __func__);
89
90 fhci_stop_sof_timer(fhci);
91
92 fhci_flush_all_transmissions(usb);
93
94 fhci_usb_disable_interrupt((struct fhci_usb *)fhci->usb_lld);
95 port_status = usb->port_status;
96 usb->port_status = FHCI_PORT_DISABLED;
97
98 /* Enable IDLE since we want to know if something comes along */
99 usb->saved_msk |= USB_E_IDLE_MASK;
100 out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk);
101
102 /* check if during the disconnection process attached new device */
103 if (port_status == FHCI_PORT_WAITING)
104 fhci_device_connected_interrupt(fhci);
105 usb->vroot_hub->port.wPortStatus &= ~USB_PORT_STAT_ENABLE;
106 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_ENABLE;
107 fhci_usb_enable_interrupt((struct fhci_usb *)fhci->usb_lld);
108
109 fhci_dbg(fhci, "<- %s\n", __func__);
110}
111
112/* enable the USB port by setting the EN bit in the USBMOD register */
113void fhci_port_enable(void *lld)
114{
115 struct fhci_usb *usb = (struct fhci_usb *)lld;
116 struct fhci_hcd *fhci = usb->fhci;
117
118 fhci_dbg(fhci, "-> %s\n", __func__);
119
120 fhci_config_transceiver(fhci, usb->port_status);
121
122 if ((usb->port_status != FHCI_PORT_FULL) &&
123 (usb->port_status != FHCI_PORT_LOW))
124 fhci_start_sof_timer(fhci);
125
126 usb->vroot_hub->port.wPortStatus |= USB_PORT_STAT_ENABLE;
127 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_ENABLE;
128
129 fhci_dbg(fhci, "<- %s\n", __func__);
130}
131
132void fhci_io_port_generate_reset(struct fhci_hcd *fhci)
133{
134 fhci_dbg(fhci, "-> %s\n", __func__);
135
136 gpio_direction_output(fhci->gpios[GPIO_USBOE], 0);
137 gpio_direction_output(fhci->gpios[GPIO_USBTP], 0);
138 gpio_direction_output(fhci->gpios[GPIO_USBTN], 0);
139
140 mdelay(5);
141
142 qe_pin_set_dedicated(fhci->pins[PIN_USBOE]);
143 qe_pin_set_dedicated(fhci->pins[PIN_USBTP]);
144 qe_pin_set_dedicated(fhci->pins[PIN_USBTN]);
145
146 fhci_dbg(fhci, "<- %s\n", __func__);
147}
148
149/* generate the RESET condition on the bus */
150void fhci_port_reset(void *lld)
151{
152 struct fhci_usb *usb = (struct fhci_usb *)lld;
153 struct fhci_hcd *fhci = usb->fhci;
154 u8 mode;
155 u16 mask;
156
157 fhci_dbg(fhci, "-> %s\n", __func__);
158
159 fhci_stop_sof_timer(fhci);
160 /* disable the USB controller */
161 mode = in_8(&fhci->regs->usb_mod);
162 out_8(&fhci->regs->usb_mod, mode & (~USB_MODE_EN));
163
164 /* disable idle interrupts */
165 mask = in_be16(&fhci->regs->usb_mask);
166 out_be16(&fhci->regs->usb_mask, mask & (~USB_E_IDLE_MASK));
167
168 fhci_io_port_generate_reset(fhci);
169
170 /* enable interrupt on this endpoint */
171 out_be16(&fhci->regs->usb_mask, mask);
172
173 /* enable the USB controller */
174 mode = in_8(&fhci->regs->usb_mod);
175 out_8(&fhci->regs->usb_mod, mode | USB_MODE_EN);
176 fhci_start_sof_timer(fhci);
177
178 fhci_dbg(fhci, "<- %s\n", __func__);
179}
180
181int fhci_hub_status_data(struct usb_hcd *hcd, char *buf)
182{
183 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
184 int ret = 0;
185 unsigned long flags;
186
187 fhci_dbg(fhci, "-> %s\n", __func__);
188
189 spin_lock_irqsave(&fhci->lock, flags);
190
191 if (fhci->vroot_hub->port.wPortChange & (USB_PORT_STAT_C_CONNECTION |
192 USB_PORT_STAT_C_ENABLE | USB_PORT_STAT_C_SUSPEND |
193 USB_PORT_STAT_C_RESET | USB_PORT_STAT_C_OVERCURRENT)) {
194 *buf = 1 << 1;
195 ret = 1;
196 fhci_dbg(fhci, "-- %s\n", __func__);
197 }
198
199 spin_unlock_irqrestore(&fhci->lock, flags);
200
201 fhci_dbg(fhci, "<- %s\n", __func__);
202
203 return ret;
204}
205
206int fhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
207 u16 wIndex, char *buf, u16 wLength)
208{
209 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
210 int retval = 0;
211 int len = 0;
212 struct usb_hub_status *hub_status;
213 struct usb_port_status *port_status;
214 unsigned long flags;
215
216 spin_lock_irqsave(&fhci->lock, flags);
217
218 fhci_dbg(fhci, "-> %s\n", __func__);
219
220 switch (typeReq) {
221 case ClearHubFeature:
222 switch (wValue) {
223 case C_HUB_LOCAL_POWER:
224 case C_HUB_OVER_CURRENT:
225 break;
226 default:
227 goto error;
228 }
229 break;
230 case ClearPortFeature:
231 fhci->vroot_hub->feature &= (1 << wValue);
232
233 switch (wValue) {
234 case USB_PORT_FEAT_ENABLE:
235 fhci->vroot_hub->port.wPortStatus &=
236 ~USB_PORT_STAT_ENABLE;
237 fhci_port_disable(fhci);
238 break;
239 case USB_PORT_FEAT_C_ENABLE:
240 fhci->vroot_hub->port.wPortChange &=
241 ~USB_PORT_STAT_C_ENABLE;
242 break;
243 case USB_PORT_FEAT_SUSPEND:
244 fhci->vroot_hub->port.wPortStatus &=
245 ~USB_PORT_STAT_SUSPEND;
246 fhci_stop_sof_timer(fhci);
247 break;
248 case USB_PORT_FEAT_C_SUSPEND:
249 fhci->vroot_hub->port.wPortChange &=
250 ~USB_PORT_STAT_C_SUSPEND;
251 break;
252 case USB_PORT_FEAT_POWER:
253 fhci->vroot_hub->port.wPortStatus &=
254 ~USB_PORT_STAT_POWER;
255 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
256 break;
257 case USB_PORT_FEAT_C_CONNECTION:
258 fhci->vroot_hub->port.wPortChange &=
259 ~USB_PORT_STAT_C_CONNECTION;
260 break;
261 case USB_PORT_FEAT_C_OVER_CURRENT:
262 fhci->vroot_hub->port.wPortChange &=
263 ~USB_PORT_STAT_C_OVERCURRENT;
264 break;
265 case USB_PORT_FEAT_C_RESET:
266 fhci->vroot_hub->port.wPortChange &=
267 ~USB_PORT_STAT_C_RESET;
268 break;
269 default:
270 goto error;
271 }
272 break;
273 case GetHubDescriptor:
274 memcpy(buf, root_hub_des, sizeof(root_hub_des));
275 buf[3] = 0x11; /* per-port power, no ovrcrnt */
276 len = (buf[0] < wLength) ? buf[0] : wLength;
277 break;
278 case GetHubStatus:
279 hub_status = (struct usb_hub_status *)buf;
280 hub_status->wHubStatus =
281 cpu_to_le16(fhci->vroot_hub->hub.wHubStatus);
282 hub_status->wHubChange =
283 cpu_to_le16(fhci->vroot_hub->hub.wHubChange);
284 len = 4;
285 break;
286 case GetPortStatus:
287 port_status = (struct usb_port_status *)buf;
288 port_status->wPortStatus =
289 cpu_to_le16(fhci->vroot_hub->port.wPortStatus);
290 port_status->wPortChange =
291 cpu_to_le16(fhci->vroot_hub->port.wPortChange);
292 len = 4;
293 break;
294 case SetHubFeature:
295 switch (wValue) {
296 case C_HUB_OVER_CURRENT:
297 case C_HUB_LOCAL_POWER:
298 break;
299 default:
300 goto error;
301 }
302 break;
303 case SetPortFeature:
304 fhci->vroot_hub->feature |= (1 << wValue);
305
306 switch (wValue) {
307 case USB_PORT_FEAT_ENABLE:
308 fhci->vroot_hub->port.wPortStatus |=
309 USB_PORT_STAT_ENABLE;
310 fhci_port_enable(fhci->usb_lld);
311 break;
312 case USB_PORT_FEAT_SUSPEND:
313 fhci->vroot_hub->port.wPortStatus |=
314 USB_PORT_STAT_SUSPEND;
315 fhci_stop_sof_timer(fhci);
316 break;
317 case USB_PORT_FEAT_RESET:
318 fhci->vroot_hub->port.wPortStatus |=
319 USB_PORT_STAT_RESET;
320 fhci_port_reset(fhci->usb_lld);
321 fhci->vroot_hub->port.wPortStatus |=
322 USB_PORT_STAT_ENABLE;
323 fhci->vroot_hub->port.wPortStatus &=
324 ~USB_PORT_STAT_RESET;
325 break;
326 case USB_PORT_FEAT_POWER:
327 fhci->vroot_hub->port.wPortStatus |=
328 USB_PORT_STAT_POWER;
329 fhci_config_transceiver(fhci, FHCI_PORT_WAITING);
330 break;
331 default:
332 goto error;
333 }
334 break;
335 default:
336error:
337 retval = -EPIPE;
338 }
339
340 fhci_dbg(fhci, "<- %s\n", __func__);
341
342 spin_unlock_irqrestore(&fhci->lock, flags);
343
344 return retval;
345}
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-03 05:53:44 -0500