* MA 02111-1307 USA
*/
#include <common.h>
+#include <errno.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
#include <usb.h>
#include <asm/io.h>
#include <malloc.h>
#include <watchdog.h>
+#include <linux/compiler.h>
#include "ehci.h"
struct ehci_hcor *hcor;
int rootdev;
uint16_t portreset;
- struct QH qh_list __attribute__((aligned(USB_DMA_MINALIGN)));
+ struct QH qh_list __aligned(USB_DMA_MINALIGN);
+ struct QH periodic_queue __aligned(USB_DMA_MINALIGN);
+ uint32_t *periodic_list;
+ int ntds;
} ehcic[CONFIG_USB_MAX_CONTROLLER_COUNT];
#define ALIGN_END_ADDR(type, ptr, size) \
uint32_t reg;
uint32_t cmd;
struct QH *qh_list;
+ struct QH *periodic;
+ int i;
if (ehci_hcd_init(index, &ehcic[index].hccr, &ehcic[index].hcor))
return -1;
qh_list->qh_overlay.qt_token =
cpu_to_hc32(QT_TOKEN_STATUS(QT_TOKEN_STATUS_HALTED));
+ /* Set async. queue head pointer. */
+ ehci_writel(&ehcic[index].hcor->or_asynclistaddr, (uint32_t)qh_list);
+
+ /*
+ * Set up periodic list
+ * Step 1: Parent QH for all periodic transfers.
+ */
+ periodic = &ehcic[index].periodic_queue;
+ memset(periodic, 0, sizeof(*periodic));
+ periodic->qh_link = cpu_to_hc32(QH_LINK_TERMINATE);
+ periodic->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
+ periodic->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
+
+ /*
+ * Step 2: Setup frame-list: Every microframe, USB tries the same list.
+ * In particular, device specifications on polling frequency
+ * are disregarded. Keyboards seem to send NAK/NYet reliably
+ * when polled with an empty buffer.
+ *
+ * Split Transactions will be spread across microframes using
+ * S-mask and C-mask.
+ */
+ ehcic[index].periodic_list = memalign(4096, 1024*4);
+ if (!ehcic[index].periodic_list)
+ return -ENOMEM;
+ for (i = 0; i < 1024; i++) {
+ ehcic[index].periodic_list[i] = (uint32_t)periodic
+ | QH_LINK_TYPE_QH;
+ }
+
+ /* Set periodic list base address */
+ ehci_writel(&ehcic[index].hcor->or_periodiclistbase,
+ (uint32_t)ehcic[index].periodic_list);
+
reg = ehci_readl(&ehcic[index].hccr->cr_hcsparams);
descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
debug("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
return ehci_submit_async(dev, pipe, buffer, length, setup);
}
+struct int_queue {
+ struct QH *first;
+ struct QH *current;
+ struct QH *last;
+ struct qTD *tds;
+};
+
+#define NEXT_QH(qh) (struct QH *)((qh)->qh_link & ~0x1f)
+
+static int
+enable_periodic(struct ehci_ctrl *ctrl)
+{
+ uint32_t cmd;
+ struct ehci_hcor *hcor = ctrl->hcor;
+ int ret;
+
+ cmd = ehci_readl(&hcor->or_usbcmd);
+ cmd |= CMD_PSE;
+ ehci_writel(&hcor->or_usbcmd, cmd);
+
+ ret = handshake((uint32_t *)&hcor->or_usbsts,
+ STS_PSS, STS_PSS, 100 * 1000);
+ if (ret < 0) {
+ printf("EHCI failed: timeout when enabling periodic list\n");
+ return -ETIMEDOUT;
+ }
+ udelay(1000);
+ return 0;
+}
+
+static int
+disable_periodic(struct ehci_ctrl *ctrl)
+{
+ uint32_t cmd;
+ struct ehci_hcor *hcor = ctrl->hcor;
+ int ret;
+
+ cmd = ehci_readl(&hcor->or_usbcmd);
+ cmd &= ~CMD_PSE;
+ ehci_writel(&hcor->or_usbcmd, cmd);
+
+ ret = handshake((uint32_t *)&hcor->or_usbsts,
+ STS_PSS, 0, 100 * 1000);
+ if (ret < 0) {
+ printf("EHCI failed: timeout when disabling periodic list\n");
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
+static int periodic_schedules;
+
+struct int_queue *
+create_int_queue(struct usb_device *dev, unsigned long pipe, int queuesize,
+ int elementsize, void *buffer)
+{
+ struct ehci_ctrl *ctrl = dev->controller;
+ struct int_queue *result = NULL;
+ int i;
+
+ debug("Enter create_int_queue\n");
+ if (usb_pipetype(pipe) != PIPE_INTERRUPT) {
+ debug("non-interrupt pipe (type=%lu)", usb_pipetype(pipe));
+ return NULL;
+ }
+
+ /* limit to 4 full pages worth of data -
+ * we can safely fit them in a single TD,
+ * no matter the alignment
+ */
+ if (elementsize >= 16384) {
+ debug("too large elements for interrupt transfers\n");
+ return NULL;
+ }
+
+ result = malloc(sizeof(*result));
+ if (!result) {
+ debug("ehci intr queue: out of memory\n");
+ goto fail1;
+ }
+ result->first = memalign(32, sizeof(struct QH) * queuesize);
+ if (!result->first) {
+ debug("ehci intr queue: out of memory\n");
+ goto fail2;
+ }
+ result->current = result->first;
+ result->last = result->first + queuesize - 1;
+ result->tds = memalign(32, sizeof(struct qTD) * queuesize);
+ if (!result->tds) {
+ debug("ehci intr queue: out of memory\n");
+ goto fail3;
+ }
+ memset(result->first, 0, sizeof(struct QH) * queuesize);
+ memset(result->tds, 0, sizeof(struct qTD) * queuesize);
+
+ for (i = 0; i < queuesize; i++) {
+ struct QH *qh = result->first + i;
+ struct qTD *td = result->tds + i;
+ void **buf = &qh->buffer;
+
+ qh->qh_link = (uint32_t)(qh+1) | QH_LINK_TYPE_QH;
+ if (i == queuesize - 1)
+ qh->qh_link = QH_LINK_TERMINATE;
+
+ qh->qh_overlay.qt_next = (uint32_t)td;
+ qh->qh_endpt1 = (0 << 28) | /* No NAK reload (ehci 4.9) */
+ (usb_maxpacket(dev, pipe) << 16) | /* MPS */
+ (1 << 14) |
+ QH_ENDPT1_EPS(ehci_encode_speed(dev->speed)) |
+ (usb_pipeendpoint(pipe) << 8) | /* Endpoint Number */
+ (usb_pipedevice(pipe) << 0);
+ qh->qh_endpt2 = (1 << 30) | /* 1 Tx per mframe */
+ (1 << 0); /* S-mask: microframe 0 */
+ if (dev->speed == USB_SPEED_LOW ||
+ dev->speed == USB_SPEED_FULL) {
+ debug("TT: port: %d, hub address: %d\n",
+ dev->portnr, dev->parent->devnum);
+ qh->qh_endpt2 |= (dev->portnr << 23) |
+ (dev->parent->devnum << 16) |
+ (0x1c << 8); /* C-mask: microframes 2-4 */
+ }
+
+ td->qt_next = QT_NEXT_TERMINATE;
+ td->qt_altnext = QT_NEXT_TERMINATE;
+ debug("communication direction is '%s'\n",
+ usb_pipein(pipe) ? "in" : "out");
+ td->qt_token = (elementsize << 16) |
+ ((usb_pipein(pipe) ? 1 : 0) << 8) | /* IN/OUT token */
+ 0x80; /* active */
+ td->qt_buffer[0] = (uint32_t)buffer + i * elementsize;
+ td->qt_buffer[1] = (td->qt_buffer[0] + 0x1000) & ~0xfff;
+ td->qt_buffer[2] = (td->qt_buffer[0] + 0x2000) & ~0xfff;
+ td->qt_buffer[3] = (td->qt_buffer[0] + 0x3000) & ~0xfff;
+ td->qt_buffer[4] = (td->qt_buffer[0] + 0x4000) & ~0xfff;
+
+ *buf = buffer + i * elementsize;
+ }
+
+ if (disable_periodic(ctrl) < 0) {
+ debug("FATAL: periodic should never fail, but did");
+ goto fail3;
+ }
+
+ /* hook up to periodic list */
+ struct QH *list = &ctrl->periodic_queue;
+ result->last->qh_link = list->qh_link;
+ list->qh_link = (uint32_t)result->first | QH_LINK_TYPE_QH;
+
+ if (enable_periodic(ctrl) < 0) {
+ debug("FATAL: periodic should never fail, but did");
+ goto fail3;
+ }
+ periodic_schedules++;
+
+ debug("Exit create_int_queue\n");
+ return result;
+fail3:
+ if (result->tds)
+ free(result->tds);
+fail2:
+ if (result->first)
+ free(result->first);
+ if (result)
+ free(result);
+fail1:
+ return NULL;
+}
+
+void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
+{
+ struct QH *cur = queue->current;
+
+ /* depleted queue */
+ if (cur == NULL) {
+ debug("Exit poll_int_queue with completed queue\n");
+ return NULL;
+ }
+ /* still active */
+ if (cur->qh_overlay.qt_token & 0x80) {
+ debug("Exit poll_int_queue with no completed intr transfer. "
+ "token is %x\n", cur->qh_overlay.qt_token);
+ return NULL;
+ }
+ if (!(cur->qh_link & QH_LINK_TERMINATE))
+ queue->current++;
+ else
+ queue->current = NULL;
+ debug("Exit poll_int_queue with completed intr transfer. "
+ "token is %x at %p (first at %p)\n", cur->qh_overlay.qt_token,
+ &cur->qh_overlay.qt_token, queue->first);
+ return cur->buffer;
+}
+
+/* Do not free buffers associated with QHs, they're owned by someone else */
+int
+destroy_int_queue(struct usb_device *dev, struct int_queue *queue)
+{
+ struct ehci_ctrl *ctrl = dev->controller;
+ int result = -1;
+ unsigned long timeout;
+
+ if (disable_periodic(ctrl) < 0) {
+ debug("FATAL: periodic should never fail, but did");
+ goto out;
+ }
+ periodic_schedules--;
+
+ struct QH *cur = &ctrl->periodic_queue;
+ timeout = get_timer(0) + 500; /* abort after 500ms */
+ while (!(cur->qh_link & QH_LINK_TERMINATE)) {
+ debug("considering %p, with qh_link %x\n", cur, cur->qh_link);
+ if (NEXT_QH(cur) == queue->first) {
+ debug("found candidate. removing from chain\n");
+ cur->qh_link = queue->last->qh_link;
+ result = 0;
+ break;
+ }
+ cur = NEXT_QH(cur);
+ if (get_timer(0) > timeout) {
+ printf("Timeout destroying interrupt endpoint queue\n");
+ result = -1;
+ goto out;
+ }
+ }
+
+ if (periodic_schedules > 0) {
+ result = enable_periodic(ctrl);
+ if (result < 0)
+ debug("FATAL: periodic should never fail, but did");
+ }
+
+out:
+ free(queue->tds);
+ free(queue->first);
+ free(queue);
+
+ return result;
+}
+
int
submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int length, int interval)
{
+ void *backbuffer;
+ struct int_queue *queue;
+ unsigned long timeout;
+ int result = 0, ret;
+
debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
dev, pipe, buffer, length, interval);
* not require more than a single qTD.
*/
if (length > usb_maxpacket(dev, pipe)) {
- printf("%s: Interrupt transfers requiring several transactions "
- "are not supported.\n", __func__);
+ printf("%s: Interrupt transfers requiring several "
+ "transactions are not supported.\n", __func__);
return -1;
}
- return ehci_submit_async(dev, pipe, buffer, length, NULL);
+
+ queue = create_int_queue(dev, pipe, 1, length, buffer);
+
+ timeout = get_timer(0) + USB_TIMEOUT_MS(pipe);
+ while ((backbuffer = poll_int_queue(dev, queue)) == NULL)
+ if (get_timer(0) > timeout) {
+ printf("Timeout poll on interrupt endpoint\n");
+ result = -ETIMEDOUT;
+ break;
+ }
+
+ if (backbuffer != buffer) {
+ debug("got wrong buffer back (%x instead of %x)\n",
+ (uint32_t)backbuffer, (uint32_t)buffer);
+ return -EINVAL;
+ }
+
+ ret = destroy_int_queue(dev, queue);
+ if (ret < 0)
+ return ret;
+
+ /* everything worked out fine */
+ return result;
}
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