1 // Code for handling UHCI USB controllers.
3 // Copyright (C) 2009 Kevin O'Connor <kevin@koconnor.net>
5 // This file may be distributed under the terms of the GNU LGPLv3 license.
7 #include "util.h" // dprintf
8 #include "pci.h" // pci_bdf_to_bus
9 #include "config.h" // CONFIG_*
10 #include "ioport.h" // outw
11 #include "usb-uhci.h" // USBLEGSUP
12 #include "pci_regs.h" // PCI_BASE_ADDRESS_4
13 #include "usb.h" // struct usb_s
14 #include "farptr.h" // GET_FLATPTR
17 reset_uhci(struct usb_s *cntl)
19 // XXX - don't reset if not needed.
22 pci_config_writew(cntl->bdf, USBLEGSUP, USBLEGSUP_RWC);
25 outw(USBCMD_HCRESET, cntl->uhci.iobase + USBCMD);
28 // Disable interrupts and commands (just to be safe).
29 outw(0, cntl->uhci.iobase + USBINTR);
30 outw(0, cntl->uhci.iobase + USBCMD);
34 configure_uhci(struct usb_s *cntl)
36 // Allocate ram for schedule storage
37 struct uhci_td *term_td = malloc_high(sizeof(*term_td));
38 struct uhci_framelist *fl = memalign_high(sizeof(*fl), sizeof(*fl));
39 struct uhci_qh *data_qh = malloc_low(sizeof(*data_qh));
40 struct uhci_qh *term_qh = malloc_high(sizeof(*term_qh));
41 if (!term_td || !fl || !data_qh || !term_qh) {
42 dprintf(1, "No ram for uhci init\n");
46 // Work around for PIIX errata
47 memset(term_td, 0, sizeof(*term_td));
48 term_td->link = UHCI_PTR_TERM;
49 term_td->token = (uhci_explen(0) | (0x7f << TD_TOKEN_DEVADDR_SHIFT)
51 memset(term_qh, 0, sizeof(*term_qh));
52 term_qh->element = (u32)term_td;
53 term_qh->link = UHCI_PTR_TERM;
55 // Setup primary queue head.
56 memset(data_qh, 0, sizeof(*data_qh));
57 data_qh->element = UHCI_PTR_TERM;
58 data_qh->link = (u32)term_qh | UHCI_PTR_QH;
59 cntl->uhci.qh = data_qh;
61 // Set schedule to point to primary queue head
63 for (i=0; i<ARRAY_SIZE(fl->links); i++) {
64 fl->links[i] = (u32)data_qh | UHCI_PTR_QH;
67 // Set the frame length to the default: 1 ms exactly
68 outb(USBSOF_DEFAULT, cntl->uhci.iobase + USBSOF);
70 // Store the frame list base address
71 outl((u32)fl->links, cntl->uhci.iobase + USBFLBASEADD);
73 // Set the current frame number
74 outw(0, cntl->uhci.iobase + USBFRNUM);
78 start_uhci(struct usb_s *cntl)
80 // Mark as configured and running with a 64-byte max packet.
81 outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, cntl->uhci.iobase + USBCMD);
84 // Find any devices connected to the root hub.
86 check_ports(struct usb_s *cntl)
88 u16 port1 = inw(cntl->uhci.iobase + USBPORTSC1);
89 u16 port2 = inw(cntl->uhci.iobase + USBPORTSC2);
91 if (!((port1 & USBPORTSC_CCS) || (port2 & USBPORTSC_CCS)))
96 if (port1 & USBPORTSC_CCS)
97 outw(USBPORTSC_PR, cntl->uhci.iobase + USBPORTSC1);
98 if (port2 & USBPORTSC_CCS)
99 outw(USBPORTSC_PR, cntl->uhci.iobase + USBPORTSC2);
101 outw(0, cntl->uhci.iobase + USBPORTSC1);
102 outw(0, cntl->uhci.iobase + USBPORTSC2);
107 port1 = inw(cntl->uhci.iobase + USBPORTSC1);
108 if (port1 & USBPORTSC_CCS) {
109 outw(USBPORTSC_PE, cntl->uhci.iobase + USBPORTSC1);
110 int count = configure_usb_device(cntl, !!(port1 & USBPORTSC_LSDA));
112 outw(0, cntl->uhci.iobase + USBPORTSC1);
115 port2 = inw(cntl->uhci.iobase + USBPORTSC2);
116 if (port2 & USBPORTSC_CCS) {
117 outw(USBPORTSC_PE, cntl->uhci.iobase + USBPORTSC2);
118 int count = configure_usb_device(cntl, !!(port2 & USBPORTSC_LSDA));
120 outw(0, cntl->uhci.iobase + USBPORTSC2);
127 uhci_init(void *data)
129 if (! CONFIG_USB_UHCI)
131 struct usb_s *cntl = data;
133 cntl->type = USB_TYPE_UHCI;
134 cntl->uhci.iobase = (pci_config_readl(cntl->bdf, PCI_BASE_ADDRESS_4)
135 & PCI_BASE_ADDRESS_IO_MASK);
137 dprintf(3, "UHCI init on dev %02x:%02x.%x (io=%x)\n"
138 , pci_bdf_to_bus(cntl->bdf), pci_bdf_to_dev(cntl->bdf)
139 , pci_bdf_to_fn(cntl->bdf), cntl->uhci.iobase);
141 pci_config_maskw(cntl->bdf, PCI_COMMAND, 0, PCI_COMMAND_MASTER);
144 configure_uhci(cntl);
147 int count = check_ports(cntl);
149 // XXX - no devices; free data structures.
154 wait_qh(struct usb_s *cntl, struct uhci_qh *qh)
156 // XXX - 500ms just a guess
157 u64 end = calc_future_tsc(500);
159 if (qh->element & UHCI_PTR_TERM)
161 if (check_time(end)) {
162 struct uhci_td *td = (void*)(qh->element & ~UHCI_PTR_BITS);
163 dprintf(1, "Timeout on wait_qh %p (td=%p s=%x c=%x/%x)\n"
165 , inw(cntl->uhci.iobase + USBCMD)
166 , inw(cntl->uhci.iobase + USBSTS));
174 uhci_control(u32 endp, int dir, const void *cmd, int cmdsize
175 , void *data, int datasize)
177 if (! CONFIG_USB_UHCI)
180 dprintf(5, "uhci_control %x\n", endp);
181 struct usb_s *cntl = endp2cntl(endp);
182 int maxpacket = endp2maxsize(endp);
183 int lowspeed = endp2speed(endp);
184 int devaddr = endp2devaddr(endp) | (endp2ep(endp) << 7);
186 // Setup transfer descriptors
187 int count = 2 + DIV_ROUND_UP(datasize, maxpacket);
188 struct uhci_td *tds = malloc_tmphigh(sizeof(*tds) * count);
190 tds[0].link = (u32)&tds[1] | UHCI_PTR_DEPTH;
191 tds[0].status = (uhci_maxerr(3) | (lowspeed ? TD_CTRL_LS : 0)
193 tds[0].token = (uhci_explen(cmdsize) | (devaddr << TD_TOKEN_DEVADDR_SHIFT)
195 tds[0].buffer = (void*)cmd;
196 int toggle = TD_TOKEN_TOGGLE;
198 for (i=1; i<count-1; i++) {
199 tds[i].link = (u32)&tds[i+1] | UHCI_PTR_DEPTH;
200 tds[i].status = (uhci_maxerr(3) | (lowspeed ? TD_CTRL_LS : 0)
202 int len = (i == count-2 ? (datasize - (i-1)*maxpacket) : maxpacket);
203 tds[i].token = (uhci_explen(len) | toggle
204 | (devaddr << TD_TOKEN_DEVADDR_SHIFT)
205 | (dir ? USB_PID_IN : USB_PID_OUT));
206 tds[i].buffer = data + (i-1) * maxpacket;
207 toggle ^= TD_TOKEN_TOGGLE;
209 tds[i].link = UHCI_PTR_TERM;
210 tds[i].status = (uhci_maxerr(0) | (lowspeed ? TD_CTRL_LS : 0)
212 tds[i].token = (uhci_explen(0) | TD_TOKEN_TOGGLE
213 | (devaddr << TD_TOKEN_DEVADDR_SHIFT)
214 | (dir ? USB_PID_OUT : USB_PID_IN));
218 struct uhci_qh *data_qh = cntl->uhci.qh;
219 data_qh->element = (u32)&tds[0];
220 int ret = wait_qh(cntl, data_qh);
229 uhci_alloc_intr_pipe(u32 endp, int period)
231 if (! CONFIG_USB_UHCI)
234 dprintf(7, "uhci_alloc_intr_pipe %x %d\n", endp, period);
235 struct usb_s *cntl = endp2cntl(endp);
236 int maxpacket = endp2maxsize(endp);
237 int lowspeed = endp2speed(endp);
238 int devaddr = endp2devaddr(endp) | (endp2ep(endp) << 7);
239 // XXX - just grab 20 for now.
241 struct uhci_qh *qh = malloc_low(sizeof(*qh));
242 struct uhci_td *tds = malloc_low(sizeof(*tds) * count);
245 if (maxpacket > sizeof(tds[0].data))
249 qh->element = (u32)tds;
252 for (i=0; i<count; i++) {
253 tds[i].link = (i==count-1 ? (u32)&tds[0] : (u32)&tds[i+1]);
254 tds[i].status = (uhci_maxerr(3) | (lowspeed ? TD_CTRL_LS : 0)
256 tds[i].token = (uhci_explen(maxpacket) | toggle
257 | (devaddr << TD_TOKEN_DEVADDR_SHIFT)
259 tds[i].buffer = &tds[i].data;
260 toggle ^= TD_TOKEN_TOGGLE;
263 qh->next_td = &tds[0];
264 qh->pipe.endp = endp;
266 // XXX - need schedule - just add to primary list for now.
267 struct uhci_qh *data_qh = cntl->uhci.qh;
268 qh->link = data_qh->link;
269 data_qh->link = (u32)qh | UHCI_PTR_QH;
275 uhci_poll_intr(struct usb_pipe *pipe, void *data)
278 if (! CONFIG_USB_UHCI)
281 struct uhci_qh *qh = container_of(pipe, struct uhci_qh, pipe);
282 struct uhci_td *td = GET_FLATPTR(qh->next_td);
283 u32 status = GET_FLATPTR(td->status);
284 u32 token = GET_FLATPTR(td->token);
285 if (status & TD_CTRL_ACTIVE)
288 // XXX - check for errors.
291 memcpy_far(GET_SEG(SS), data
292 , FLATPTR_TO_SEG(td->data), (void*)FLATPTR_TO_OFFSET(td->data)
293 , uhci_expected_length(token));
296 u32 next = GET_FLATPTR(td->link);
297 SET_FLATPTR(td->status, (uhci_maxerr(0) | (status & TD_CTRL_LS)
299 SET_FLATPTR(qh->next_td, (void*)(next & ~UHCI_PTR_BITS));