/*
* Copyright (c) 2008, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <boot/boot.h>
#include <msm7k/hsusb.h>
#include <boot/usb.h>
#include <boot/usb_descriptors.h>
#if 1
#define DBG(x...) do {} while(0)
#else
#define DBG(x...) dprintf(x)
#endif
struct usb_endpoint
{
struct usb_endpoint *next;
unsigned bit;
struct ept_queue_head *head;
struct usb_request *req;
unsigned char num;
unsigned char in;
};
struct usb_endpoint *ept_list = 0;
struct ept_queue_head *epts = 0;
static int usb_online = 0;
static int usb_highspeed = 0;
struct usb_endpoint *usb_endpoint_alloc(unsigned num, unsigned in, unsigned max_pkt)
{
struct usb_endpoint *ept;
unsigned cfg;
ept = alloc(sizeof(*ept));
ept->num = num;
ept->in = !!in;
ept->req = 0;
cfg = CONFIG_MAX_PKT(max_pkt) | CONFIG_ZLT;
if(ept->in) {
ept->bit = EPT_TX(ept->num);
} else {
ept->bit = EPT_RX(ept->num);
if(num == 0)
cfg |= CONFIG_IOS;
}
ept->head = epts + (num * 2) + (ept->in);
ept->head->config = cfg;
ept->next = ept_list;
ept_list = ept;
DBG("ept%d %s @%p/%p max=%d bit=%x\n",
num, in ? "in":"out", ept, ept->head, max_pkt, ept->bit);
return ept;
}
static void endpoint_enable(struct usb_endpoint *ept, unsigned yes)
{
unsigned n = readl(USB_ENDPTCTRL(ept->num));
if(yes) {
if(ept->in) {
n |= (CTRL_TXE | CTRL_TXR | CTRL_TXT_BULK);
} else {
n |= (CTRL_RXE | CTRL_RXR | CTRL_RXT_BULK);
}
if(ept->num != 0) {
/* XXX should be more dynamic... */
if(usb_highspeed) {
ept->head->config = CONFIG_MAX_PKT(512) | CONFIG_ZLT;
} else {
ept->head->config = CONFIG_MAX_PKT(64) | CONFIG_ZLT;
}
}
}
writel(n, USB_ENDPTCTRL(ept->num));
}
struct usb_request *usb_request_alloc(unsigned bufsiz)
{
struct usb_request *req;
req = alloc(sizeof(*req));
req->buf = alloc(bufsiz);
req->item = alloc(32);
return req;
}
int usb_queue_req(struct usb_endpoint *ept, struct usb_request *req)
{
struct ept_queue_item *item = req->item;
unsigned phys = (unsigned) req->buf;
item->next = TERMINATE;
item->info = INFO_BYTES(req->length) | INFO_IOC | INFO_ACTIVE;
item->page0 = phys;
item->page1 = (phys & 0xfffff000) + 0x1000;
ept->head->next = (unsigned) item;
ept->head->info = 0;
ept->req = req;
DBG("ept%d %s queue req=%p\n",
ept->num, ept->in ? "in" : "out", req);
writel(ept->bit, USB_ENDPTPRIME);
return 0;
}
static void handle_ept_complete(struct usb_endpoint *ept)
{
struct ept_queue_item *item;
unsigned actual;
int status;
struct usb_request *req;
DBG("ept%d %s complete req=%p\n",
ept->num, ept->in ? "in" : "out", ept->req);
req = ept->req;
if(req) {
ept->req = 0;
item = req->item;
if(item->info & 0xff) {
actual = 0;
status = -1;
dprintf("EP%d/%s FAIL nfo=%x pg0=%x\n",
ept->num, ept->in ? "in" : "out", item->info, item->page0);
} else {
actual = req->length - ((item->info >> 16) & 0x7fff);
status = 0;
}
if(req->complete)
req->complete(req, actual, status);
}
}
static const char *reqname(unsigned r)
{
switch(r) {
case GET_STATUS: return "GET_STATUS";
case CLEAR_FEATURE: return "CLEAR_FEATURE";
case SET_FEATURE: return "SET_FEATURE";
case SET_ADDRESS: return "SET_ADDRESS";
case GET_DESCRIPTOR: return "GET_DESCRIPTOR";
case SET_DESCRIPTOR: return "SET_DESCRIPTOR";
case GET_CONFIGURATION: return "GET_CONFIGURATION";
case SET_CONFIGURATION: return "SET_CONFIGURATION";
case GET_INTERFACE: return "GET_INTERFACE";
case SET_INTERFACE: return "SET_INTERFACE";
default: return "*UNKNOWN*";
}
}
static struct usb_endpoint *ep0in, *ep0out;
static struct usb_request *ep0req;
static void setup_ack(void)
{
ep0req->complete = 0;
ep0req->length = 0;
usb_queue_req(ep0in, ep0req);
}
static void ep0in_complete(struct usb_request *req, unsigned actual, int status)
{
DBG("ep0in_complete %p %d %d\n", req, actual, status);
if(status == 0) {
req->length = 0;
req->complete = 0;
usb_queue_req(ep0out, req);
}
}
static void setup_tx(void *buf, unsigned len)
{
DBG("setup_tx %p %d\n", buf, len);
memcpy(ep0req->buf, buf, len);
ep0req->complete = ep0in_complete;
ep0req->length = len;
usb_queue_req(ep0in, ep0req);
}
static unsigned char usb_config_value = 0;
#define SETUP(type,request) (((type) << 8) | (request))
static void handle_setup(struct usb_endpoint *ept)
{
setup_packet s;
memcpy(&s, ept->head->setup_data, sizeof(s));
writel(ept->bit, USB_ENDPTSETUPSTAT);
DBG("handle_setup type=0x%b req=0x%b val=%d idx=%d len=%d (%s)\n",
s.type, s.request, s.value, s.index, s.length,
reqname(s.request));
switch(SETUP(s.type,s.request)) {
case SETUP(DEVICE_READ, GET_STATUS): {
unsigned zero = 0;
if(s.length == 2) {
setup_tx(&zero, 2);
return;
}
break;
}
case SETUP(DEVICE_READ, GET_DESCRIPTOR): {
dtable *d = usb_highspeed ? descr_hs : descr_fs;
while(d->data) {
if(s.value == d->id) {
unsigned len = d->length;
if(len > s.length) len = s.length;
setup_tx(d->data, len);
return;
}
d++;
}
break;
}
case SETUP(DEVICE_READ, GET_CONFIGURATION):
/* disabling this causes data transaction failures on OSX. Why?
*/
if((s.value == 0) && (s.index == 0) && (s.length == 1)) {
setup_tx(&usb_config_value, 1);
return;
}
break;
case SETUP(DEVICE_WRITE, SET_CONFIGURATION):
if(s.value == 1) {
struct usb_endpoint *ept;
/* enable endpoints */
for(ept = ept_list; ept; ept = ept->next){
if(ept->num == 0)
continue;
endpoint_enable(ept, s.value);
}
usb_config_value = 1;
} else {
writel(0, USB_ENDPTCTRL(1));
usb_config_value = 0;
}
setup_ack();
usb_online = s.value ? 1 : 0;
usb_status(s.value ? 1 : 0, usb_highspeed);
return;
case SETUP(DEVICE_WRITE, SET_ADDRESS):
/* write address delayed (will take effect
** after the next IN txn)
*/
writel((s.value << 25) | (1 << 24), USB_DEVICEADDR);
setup_ack();
return;
case SETUP(INTERFACE_WRITE, SET_INTERFACE):
/* if we ack this everything hangs */
/* per spec, STALL is valid if there is not alt func */
goto stall;
case SETUP(ENDPOINT_WRITE, CLEAR_FEATURE): {
struct usb_endpoint *ept;
unsigned num = s.index & 15;
unsigned in = !!(s.index & 0x80);
if((s.value == 0) && (s.length == 0)) {
DBG("clr feat %d %d\n", num, in);
for(ept = ept_list; ept; ept = ept->next) {
if((ept->num == num) && (ept->in == in)) {
endpoint_enable(ept, 1);
setup_ack();
return;
}
}
}
break;
}
}
dprintf("STALL %s %b %b %d %d %d\n",
reqname(s.request),
s.type, s.request, s.value, s.index, s.length);
stall:
writel((1<<16) | (1 << 0), USB_ENDPTCTRL(ept->num));
}
unsigned ulpi_read(unsigned reg)
{
/* initiate read operation */
writel(ULPI_RUN | ULPI_READ | ULPI_ADDR(reg),
USB_ULPI_VIEWPORT);
/* wait for completion */
while(readl(USB_ULPI_VIEWPORT) & ULPI_RUN) ;
return ULPI_DATA_READ(readl(USB_ULPI_VIEWPORT));
}
void ulpi_write(unsigned val, unsigned reg)
{
/* initiate write operation */
writel(ULPI_RUN | ULPI_WRITE |
ULPI_ADDR(reg) | ULPI_DATA(val),
USB_ULPI_VIEWPORT);
/* wait for completion */
while(readl(USB_ULPI_VIEWPORT) & ULPI_RUN) ;
}
void board_usb_init(void);
void board_ulpi_init(void);
void usb_init(void)
{
epts = alloc_page_aligned(4096);
memset(epts, 0, 32 * sizeof(struct ept_queue_head));
board_usb_init();
/* select ULPI phy */
writel(0x81000000, USB_PORTSC);
/* RESET */
writel(0x00080002, USB_USBCMD);
mdelay(20);
board_ulpi_init();
writel((unsigned) epts, USB_ENDPOINTLISTADDR);
/* select DEVICE mode */
writel(0x02, USB_USBMODE);
writel(0xffffffff, USB_ENDPTFLUSH);
/* go to RUN mode (D+ pullup enable) */
writel(0x00080001, USB_USBCMD);
ep0out = usb_endpoint_alloc(0, 0, 64);
ep0in = usb_endpoint_alloc(0, 1, 64);
ep0req = usb_request_alloc(4096);
}
void usb_shutdown(void)
{
/* disable pullup */
writel(0x0008000, USB_USBCMD);
mdelay(10);
}
void usb_poll(void)
{
struct usb_endpoint *ept;
unsigned n = readl(USB_USBSTS);
writel(n, USB_USBSTS);
n &= (STS_SLI | STS_URI | STS_PCI | STS_UI | STS_UEI);
if(n == 0) return;
if(n & STS_URI) {
writel(readl(USB_ENDPTCOMPLETE), USB_ENDPTCOMPLETE);
writel(readl(USB_ENDPTSETUPSTAT), USB_ENDPTSETUPSTAT);
writel(0xffffffff, USB_ENDPTFLUSH);
writel(0, USB_ENDPTCTRL(1));
DBG("-- reset --\n");
usb_online = 0;
usb_config_value = 0;
/* error out any pending reqs */
for(ept = ept_list; ept; ept = ept->next) {
ept->head->info = INFO_ACTIVE;
handle_ept_complete(ept);
}
usb_status(0, usb_highspeed);
}
if(n & STS_SLI) {
DBG("-- suspend --\n");
}
if(n & STS_PCI) {
DBG("-- portchange --\n");
unsigned spd = (readl(USB_PORTSC) >> 26) & 3;
if(spd == 2) {
usb_highspeed = 1;
} else {
usb_highspeed = 0;
}
}
if(n & STS_UEI) dprintf("<UEI %x>\n", readl(USB_ENDPTCOMPLETE));
#if 0
DBG("STS: ");
if(n & STS_UEI) DBG("ERROR ");
if(n & STS_SLI) DBG("SUSPEND ");
if(n & STS_URI) DBG("RESET ");
if(n & STS_PCI) DBG("PORTCHANGE ");
if(n & STS_UI) DBG("USB ");
DBG("\n");
#endif
if((n & STS_UI) || (n & STS_UEI)) {
n = readl(USB_ENDPTSETUPSTAT);
if(n & EPT_RX(0)) {
handle_setup(ep0out);
}
n = readl(USB_ENDPTCOMPLETE);
if(n != 0) {
writel(n, USB_ENDPTCOMPLETE);
}
for(ept = ept_list; ept; ept = ept->next){
if(n & ept->bit) {
handle_ept_complete(ept);
}
}
}
// dprintf("@\n");
}