2 * This file is part of the libpayload project.
4 * Copyright (C) 2008-2010 coresystems GmbH
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9 * 1. Redistributions of source code must retain the above copyright
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32 #include <libpayload.h>
39 #define RH_INST(dev) ((rh_inst_t*)(dev)->data)
42 uhci_rh_enable_port (usbdev_t *dev, int port)
45 hci_t *controller = dev->controller;
51 printf("Invalid port %d\n", port);
55 uhci_reg_mask16 (controller, port, ~(1 << 12), 0); /* wakeup */
57 uhci_reg_mask16 (controller, port, ~0, 1 << 9); /* reset */
59 uhci_reg_mask16 (controller, port, ~(1 << 9), 0);
60 mdelay (1); // >5.3us per spec, <3ms because some devices make trouble
62 uhci_reg_mask16 (controller, port, ~0, 1 << 2); /* enable */
64 value = uhci_reg_read16 (controller, port);
66 } while (((value & (1 << 2)) == 0) && (value & 0x01));
69 /* disable root hub */
71 uhci_rh_disable_port (usbdev_t *dev, int port)
73 hci_t *controller = dev->controller;
77 uhci_reg_mask16 (controller, port, ~4, 0);
80 value = uhci_reg_read16 (controller, port);
82 } while ((value & (1 << 2)) != 0);
86 uhci_rh_scanport (usbdev_t *dev, int port)
92 } else if (port == 2) {
96 printf("Invalid port %d\n", port);
99 int devno = RH_INST (dev)->port[offset];
100 if ((dev->controller->devices[devno] != 0) && (devno != -1)) {
101 usb_detach_device(dev->controller, devno);
102 RH_INST (dev)->port[offset] = -1;
104 uhci_reg_mask16 (dev->controller, portsc, ~0, (1 << 3) | (1 << 2)); // clear port state change, enable port
106 mdelay(100); // wait for signal to stabilize
108 if ((uhci_reg_read16 (dev->controller, portsc) & 1) != 0) {
111 uhci_rh_disable_port (dev, port);
112 uhci_rh_enable_port (dev, port);
114 int speed = ((uhci_reg_read16 (dev->controller, portsc) >> 8) & 1);
116 RH_INST (dev)->port[offset] = usb_attach_device(dev->controller, dev->address, portsc, speed);
121 uhci_rh_report_port_changes (usbdev_t *dev)
125 stored = (RH_INST (dev)->port[0] == -1);
126 real = ((uhci_reg_read16 (dev->controller, PORTSC1) & 1) == 0);
127 if (stored != real) {
128 debug("change on port 1\n");
132 stored = (RH_INST (dev)->port[1] == -1);
133 real = ((uhci_reg_read16 (dev->controller, PORTSC2) & 1) == 0);
134 if (stored != real) {
135 debug("change on port 2\n");
139 // maybe detach+attach happened between two scans?
141 if ((uhci_reg_read16 (dev->controller, PORTSC1) & 2) > 0) {
142 debug("possibly re-attached on port 1\n");
145 if ((uhci_reg_read16 (dev->controller, PORTSC2) & 2) > 0) {
146 debug("possibly re-attached on port 2\n");
155 uhci_rh_destroy (usbdev_t *dev)
157 uhci_rh_disable_port (dev, 1);
158 uhci_rh_disable_port (dev, 2);
159 free (RH_INST (dev));
163 uhci_rh_poll (usbdev_t *dev)
166 while ((port = uhci_rh_report_port_changes (dev)) != -1)
167 uhci_rh_scanport (dev, port);
171 uhci_rh_init (usbdev_t *dev)
173 dev->destroy = uhci_rh_destroy;
174 dev->poll = uhci_rh_poll;
176 uhci_rh_enable_port (dev, 1);
177 uhci_rh_enable_port (dev, 2);
178 dev->data = malloc (sizeof (rh_inst_t));
180 usb_fatal ("Not enough memory for UHCI RH.\n");
182 RH_INST (dev)->port[0] = -1;
183 RH_INST (dev)->port[1] = -1;
185 /* we can set them here because a root hub _really_ shouldn't