aboutsummaryrefslogtreecommitdiffstats
path: root/payloads/libpayload/drivers/usb/ehci.c
diff options
context:
space:
mode:
Diffstat (limited to 'payloads/libpayload/drivers/usb/ehci.c')
-rw-r--r--payloads/libpayload/drivers/usb/ehci.c105
1 files changed, 81 insertions, 24 deletions
diff --git a/payloads/libpayload/drivers/usb/ehci.c b/payloads/libpayload/drivers/usb/ehci.c
index af7daf199..129b9b825 100644
--- a/payloads/libpayload/drivers/usb/ehci.c
+++ b/payloads/libpayload/drivers/usb/ehci.c
@@ -30,6 +30,7 @@
//#define USB_DEBUG
#include <libpayload.h>
+#include <arch/cache.h>
#include "ehci.h"
#include "ehci_private.h"
@@ -358,9 +359,10 @@ static int ehci_process_async_schedule(
return result;
}
-static int ehci_bulk (endpoint_t *ep, int size, u8 *data, int finalize)
+static int ehci_bulk (endpoint_t *ep, int size, u8 *src, int finalize)
{
int result = 0;
+ u8 *end = src + size;
int remaining = size;
int endp = ep->endpoint & 0xf;
int pid = (ep->direction==IN)?EHCI_IN:EHCI_OUT;
@@ -372,30 +374,42 @@ static int ehci_bulk (endpoint_t *ep, int size, u8 *data, int finalize)
return -1;
}
- qtd_t *head = memalign(64, sizeof(qtd_t));
+ if (!dma_coherent(src)) {
+ end = EHCI_INST(ep->dev->controller)->dma_buffer + size;
+ if (size > DMA_SIZE) {
+ usb_debug("EHCI bulk transfer too large for DMA buffer: %d\n", size);
+ return -1;
+ }
+ if (pid == EHCI_OUT)
+ memcpy(end - size, src, size);
+ }
+
+ ehci_qh_t *qh = dma_memalign(64, sizeof(ehci_qh_t));
+ qtd_t *head = dma_memalign(64, sizeof(qtd_t));
qtd_t *cur = head;
+ if (!qh || !head)
+ goto oom;
while (1) {
memset((void *)cur, 0, sizeof(qtd_t));
cur->token = QTD_ACTIVE |
(pid << QTD_PID_SHIFT) |
(0 << QTD_CERR_SHIFT);
- u32 chunk = fill_td(cur, data, remaining);
- remaining -= chunk;
- data += chunk;
+ remaining -= fill_td(cur, end - remaining, remaining);
cur->alt_next_qtd = QTD_TERMINATE;
- if (remaining == 0) {
+ if (remaining <= 0) {
cur->next_qtd = virt_to_phys(0) | QTD_TERMINATE;
break;
} else {
- qtd_t *next = memalign(64, sizeof(qtd_t));
+ qtd_t *next = dma_memalign(64, sizeof(qtd_t));
+ if (!next)
+ goto oom;
cur->next_qtd = virt_to_phys(next);
cur = next;
}
}
/* create QH */
- ehci_qh_t *qh = memalign(64, sizeof(ehci_qh_t));
memset((void *)qh, 0, sizeof(ehci_qh_t));
qh->horiz_link_ptr = virt_to_phys(qh) | QH_QH;
qh->epchar = ep->dev->address |
@@ -415,21 +429,31 @@ static int ehci_bulk (endpoint_t *ep, int size, u8 *data, int finalize)
result = ehci_process_async_schedule(
EHCI_INST(ep->dev->controller), qh, head);
- if (result >= 0)
+ if (result >= 0) {
result = size - result;
+ if (pid == EHCI_IN && end != src + size)
+ memcpy(src, end - size, result);
+ }
ep->toggle = (cur->token & QTD_TOGGLE_MASK) >> QTD_TOGGLE_SHIFT;
free_qh_and_tds(qh, head);
return result;
+
+oom:
+ usb_debug("Not enough DMA memory for EHCI control structures!\n");
+ free_qh_and_tds(qh, head);
+ return -1;
}
/* FIXME: Handle control transfers as 3 QHs, so the 2nd stage can be >0x4000 bytes */
-static int ehci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq,
- int dalen, u8 *data)
+static int ehci_control (usbdev_t *dev, direction_t dir, int drlen, void *setup,
+ int dalen, u8 *src)
{
+ u8 *data = src;
+ u8 *devreq = setup;
int endp = 0; // this is control. always 0 (for now)
int toggle = 0;
int mlen = dev->endpoints[0].maxpacketsize;
@@ -443,9 +467,26 @@ static int ehci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq
non_hs_ctrl_ep = 1;
}
+ if (!dma_coherent(setup)) {
+ devreq = EHCI_INST(dev->controller)->dma_buffer;
+ memcpy(devreq, setup, drlen);
+ }
+ if (dalen > 0 && !dma_coherent(src)) {
+ data = EHCI_INST(dev->controller)->dma_buffer + drlen;
+ if (drlen + dalen > DMA_SIZE) {
+ usb_debug("EHCI control transfer too large for DMA buffer: %d\n", drlen + dalen);
+ return -1;
+ }
+ if (dir == OUT)
+ memcpy(data, src, dalen);
+ }
+
/* create qTDs */
- qtd_t *head = memalign(64, sizeof(qtd_t));
+ qtd_t *head = dma_memalign(64, sizeof(qtd_t));
+ ehci_qh_t *qh = dma_memalign(64, sizeof(ehci_qh_t));
qtd_t *cur = head;
+ if (!qh || !head)
+ goto oom;
memset((void *)cur, 0, sizeof(qtd_t));
cur->token = QTD_ACTIVE |
(toggle?QTD_TOGGLE_DATA1:0) |
@@ -454,9 +495,11 @@ static int ehci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq
if (fill_td(cur, devreq, drlen) != drlen) {
usb_debug("ERROR: couldn't send the entire device request\n");
}
- qtd_t *next = memalign(64, sizeof(qtd_t));
+ qtd_t *next = dma_memalign(64, sizeof(qtd_t));
cur->next_qtd = virt_to_phys(next);
cur->alt_next_qtd = QTD_TERMINATE;
+ if (!next)
+ goto oom;
/* FIXME: We're limited to 16-20K (depending on alignment) for payload for now.
* Figure out, how toggle can be set sensibly in this scenario */
@@ -471,7 +514,9 @@ static int ehci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq
if (fill_td(cur, data, dalen) != dalen) {
usb_debug("ERROR: couldn't send the entire control payload\n");
}
- next = memalign(64, sizeof(qtd_t));
+ next = dma_memalign(64, sizeof(qtd_t));
+ if (!next)
+ goto oom;
cur->next_qtd = virt_to_phys(next);
cur->alt_next_qtd = QTD_TERMINATE;
}
@@ -488,7 +533,6 @@ static int ehci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq
cur->alt_next_qtd = QTD_TERMINATE;
/* create QH */
- ehci_qh_t *qh = memalign(64, sizeof(ehci_qh_t));
memset((void *)qh, 0, sizeof(ehci_qh_t));
qh->horiz_link_ptr = virt_to_phys(qh) | QH_QH;
qh->epchar = dev->address |
@@ -506,11 +550,19 @@ static int ehci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq
result = ehci_process_async_schedule(
EHCI_INST(dev->controller), qh, head);
- if (result >= 0)
+ if (result >= 0) {
result = dalen - result;
+ if (dir == IN && data != src)
+ memcpy(src, data, result);
+ }
free_qh_and_tds(qh, head);
return result;
+
+oom:
+ usb_debug("Not enough DMA memory for EHCI control structures!\n");
+ free_qh_and_tds(qh, head);
+ return -1;
}
@@ -581,13 +633,12 @@ static void *ehci_create_intr_queue(
return NULL;
}
- intr_queue_t *const intrq =
- (intr_queue_t *)memalign(64, sizeof(intr_queue_t));
+ intr_queue_t *const intrq = (intr_queue_t *)malloc(sizeof(intr_queue_t));
/*
* reqcount data chunks
* plus one more spare, which we'll leave out of queue
*/
- u8 *data = (u8 *)malloc(reqsize * (reqcount + 1));
+ u8 *data = (u8 *)dma_malloc(reqsize * (reqcount + 1));
if (!intrq || !data)
fatal("Not enough memory to create USB interrupt queue.\n");
intrq->data = data;
@@ -595,7 +646,7 @@ static void *ehci_create_intr_queue(
intrq->reqsize = reqsize;
/* create #reqcount transfer descriptors (qTDs) */
- intrq->head = (intr_qtd_t *)memalign(64, sizeof(intr_qtd_t));
+ intrq->head = (intr_qtd_t *)dma_memalign(64, sizeof(intr_qtd_t));
intr_qtd_t *cur_td = intrq->head;
for (i = 0; i < reqcount; ++i) {
fill_intr_queue_td(intrq, cur_td, data);
@@ -603,7 +654,7 @@ static void *ehci_create_intr_queue(
if (i < reqcount - 1) {
/* create one more qTD */
intr_qtd_t *const next_td =
- (intr_qtd_t *)memalign(64, sizeof(intr_qtd_t));
+ (intr_qtd_t *)dma_memalign(64, sizeof(intr_qtd_t));
cur_td->td.next_qtd = virt_to_phys(&next_td->td);
cur_td->next = next_td;
cur_td = next_td;
@@ -612,7 +663,7 @@ static void *ehci_create_intr_queue(
intrq->tail = cur_td;
/* create spare qTD */
- intrq->spare = (intr_qtd_t *)memalign(64, sizeof(intr_qtd_t));
+ intrq->spare = (intr_qtd_t *)dma_memalign(64, sizeof(intr_qtd_t));
fill_intr_queue_td(intrq, intrq->spare, data);
/* initialize QH */
@@ -780,16 +831,22 @@ ehci_init (unsigned long physical_bar)
/* Initialize periodic frame list */
/* 1024 32-bit pointers, 4kb aligned */
- u32 *const periodic_list = (u32 *)memalign(4096, 1024 * sizeof(u32));
+ u32 *const periodic_list = (u32 *)dma_memalign(4096, 1024 * sizeof(u32));
if (!periodic_list)
fatal("Not enough memory creating EHCI periodic frame list.\n");
+ if (dma_initialized()) {
+ EHCI_INST(controller)->dma_buffer = dma_memalign(4096, DMA_SIZE);
+ if (!EHCI_INST(controller)->dma_buffer)
+ fatal("Not enough DMA memory for EHCI bounce buffer.\n");
+ }
+
/*
* Insert dummy QH in periodic frame list
* This helps with broken host controllers
* and doesn't violate the standard.
*/
- EHCI_INST(controller)->dummy_qh = (ehci_qh_t *)memalign(64, sizeof(ehci_qh_t));
+ EHCI_INST(controller)->dummy_qh = (ehci_qh_t *)dma_memalign(64, sizeof(ehci_qh_t));
memset((void *)EHCI_INST(controller)->dummy_qh, 0,
sizeof(*EHCI_INST(controller)->dummy_qh));
EHCI_INST(controller)->dummy_qh->horiz_link_ptr = QH_TERMINATE;