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path: root/drivers/usb/host/ehci-hcd.c
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Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
-rw-r--r--drivers/usb/host/ehci-hcd.c96
1 files changed, 51 insertions, 45 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 04300be1100..2a82a29125a 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -34,7 +34,10 @@ struct ehci_hccr *hccr; /* R/O registers, not need for volatile */
volatile struct ehci_hcor *hcor;
static uint16_t portreset;
-static struct QH qh_list __attribute__((aligned(32)));
+DEFINE_ALIGN_BUFFER(struct QH, qh_list, 1, USB_DMA_MINALIGN);
+
+#define ALIGN_END_ADDR(type, ptr, size) \
+ ((uint32_t)(ptr) + roundup((size) * sizeof(type), USB_DMA_MINALIGN))
static struct descriptor {
struct usb_hub_descriptor hub;
@@ -172,18 +175,15 @@ static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
{
uint32_t delta, next;
uint32_t addr = (uint32_t)buf;
- size_t rsz = roundup(sz, 32);
int idx;
- if (sz != rsz)
- debug("EHCI-HCD: Misaligned buffer size (%08x)\n", sz);
-
- if (addr & 31)
+ if (addr != ALIGN(addr, ARCH_DMA_MINALIGN))
debug("EHCI-HCD: Misaligned buffer address (%p)\n", buf);
+ flush_dcache_range(addr, ALIGN(addr + sz, ARCH_DMA_MINALIGN));
+
idx = 0;
while (idx < 5) {
- flush_dcache_range(addr, addr + rsz);
td->qt_buffer[idx] = cpu_to_hc32(addr);
td->qt_buffer_hi[idx] = 0;
next = (addr + 4096) & ~4095;
@@ -196,7 +196,7 @@ static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
}
if (idx == 5) {
- debug("out of buffer pointers (%u bytes left)\n", sz);
+ printf("out of buffer pointers (%u bytes left)\n", sz);
return -1;
}
@@ -207,8 +207,8 @@ static int
ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
int length, struct devrequest *req)
{
- static struct QH qh __attribute__((aligned(32)));
- static struct qTD qtd[3] __attribute__((aligned (32)));
+ ALLOC_ALIGN_BUFFER(struct QH, qh, 1, USB_DMA_MINALIGN);
+ ALLOC_ALIGN_BUFFER(struct qTD, qtd, 3, USB_DMA_MINALIGN);
int qtd_counter = 0;
volatile struct qTD *vtd;
@@ -229,8 +229,8 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
le16_to_cpu(req->value), le16_to_cpu(req->value),
le16_to_cpu(req->index));
- memset(&qh, 0, sizeof(struct QH));
- memset(qtd, 0, sizeof(qtd));
+ memset(qh, 0, sizeof(struct QH));
+ memset(qtd, 0, 3 * sizeof(*qtd));
toggle = usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
@@ -244,7 +244,7 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
* qh_overlay.qt_next ...... 13-10 H
* - qh_overlay.qt_altnext
*/
- qh.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
+ qh->qh_link = cpu_to_hc32((uint32_t)qh_list | QH_LINK_TYPE_QH);
c = (usb_pipespeed(pipe) != USB_SPEED_HIGH &&
usb_pipeendpoint(pipe) == 0) ? 1 : 0;
endpt = (8 << 28) |
@@ -255,14 +255,14 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
(usb_pipespeed(pipe) << 12) |
(usb_pipeendpoint(pipe) << 8) |
(0 << 7) | (usb_pipedevice(pipe) << 0);
- qh.qh_endpt1 = cpu_to_hc32(endpt);
+ qh->qh_endpt1 = cpu_to_hc32(endpt);
endpt = (1 << 30) |
(dev->portnr << 23) |
(dev->parent->devnum << 16) | (0 << 8) | (0 << 0);
- qh.qh_endpt2 = cpu_to_hc32(endpt);
- qh.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
+ qh->qh_endpt2 = cpu_to_hc32(endpt);
+ qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
- tdp = &qh.qh_overlay.qt_next;
+ tdp = &qh->qh_overlay.qt_next;
if (req != NULL) {
/*
@@ -281,7 +281,7 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
(0 << 15) | (0 << 12) | (3 << 10) | (2 << 8) | (0x80 << 0);
qtd[qtd_counter].qt_token = cpu_to_hc32(token);
if (ehci_td_buffer(&qtd[qtd_counter], req, sizeof(*req)) != 0) {
- debug("unable construct SETUP td\n");
+ printf("unable construct SETUP td\n");
goto fail;
}
/* Update previous qTD! */
@@ -310,7 +310,7 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
((usb_pipein(pipe) ? 1 : 0) << 8) | (0x80 << 0);
qtd[qtd_counter].qt_token = cpu_to_hc32(token);
if (ehci_td_buffer(&qtd[qtd_counter], buffer, length) != 0) {
- debug("unable construct DATA td\n");
+ printf("unable construct DATA td\n");
goto fail;
}
/* Update previous qTD! */
@@ -340,13 +340,16 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
tdp = &qtd[qtd_counter++].qt_next;
}
- qh_list.qh_link = cpu_to_hc32((uint32_t)&qh | QH_LINK_TYPE_QH);
+ qh_list->qh_link = cpu_to_hc32((uint32_t)qh | QH_LINK_TYPE_QH);
/* Flush dcache */
- flush_dcache_range((uint32_t)&qh_list,
- (uint32_t)&qh_list + sizeof(struct QH));
- flush_dcache_range((uint32_t)&qh, (uint32_t)&qh + sizeof(struct QH));
- flush_dcache_range((uint32_t)qtd, (uint32_t)qtd + sizeof(qtd));
+ flush_dcache_range((uint32_t)qh_list,
+ ALIGN_END_ADDR(struct QH, qh_list, 1));
+ flush_dcache_range((uint32_t)qh, ALIGN_END_ADDR(struct QH, qh, 1));
+ flush_dcache_range((uint32_t)qtd, ALIGN_END_ADDR(struct qTD, qtd, 3));
+
+ /* Set async. queue head pointer. */
+ ehci_writel(&hcor->or_asynclistaddr, (uint32_t)qh_list);
usbsts = ehci_readl(&hcor->or_usbsts);
ehci_writel(&hcor->or_usbsts, (usbsts & 0x3f));
@@ -369,12 +372,12 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
timeout = USB_TIMEOUT_MS(pipe);
do {
/* Invalidate dcache */
- invalidate_dcache_range((uint32_t)&qh_list,
- (uint32_t)&qh_list + sizeof(struct QH));
- invalidate_dcache_range((uint32_t)&qh,
- (uint32_t)&qh + sizeof(struct QH));
+ invalidate_dcache_range((uint32_t)qh_list,
+ ALIGN_END_ADDR(struct QH, qh_list, 1));
+ invalidate_dcache_range((uint32_t)qh,
+ ALIGN_END_ADDR(struct QH, qh, 1));
invalidate_dcache_range((uint32_t)qtd,
- (uint32_t)qtd + sizeof(qtd));
+ ALIGN_END_ADDR(struct qTD, qtd, 3));
token = hc32_to_cpu(vtd->qt_token);
if (!(token & 0x80))
@@ -382,9 +385,17 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
WATCHDOG_RESET();
} while (get_timer(ts) < timeout);
- /* Invalidate the memory area occupied by buffer */
- invalidate_dcache_range(((uint32_t)buffer & ~31),
- ((uint32_t)buffer & ~31) + roundup(length, 32));
+ /*
+ * Invalidate the memory area occupied by buffer
+ * Don't try to fix the buffer alignment, if it isn't properly
+ * aligned it's upper layer's fault so let invalidate_dcache_range()
+ * vow about it. But we have to fix the length as it's actual
+ * transfer length and can be unaligned. This is potentially
+ * dangerous operation, it's responsibility of the calling
+ * code to make sure enough space is reserved.
+ */
+ invalidate_dcache_range((uint32_t)buffer,
+ ALIGN((uint32_t)buffer + length, ARCH_DMA_MINALIGN));
/* Check that the TD processing happened */
if (token & 0x80) {
@@ -403,9 +414,7 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
goto fail;
}
- qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
-
- token = hc32_to_cpu(qh.qh_overlay.qt_token);
+ token = hc32_to_cpu(qh->qh_overlay.qt_token);
if (!(token & 0x80)) {
debug("TOKEN=%#x\n", token);
switch (token & 0xfc) {
@@ -733,16 +742,13 @@ int usb_lowlevel_init(void)
#endif
/* Set head of reclaim list */
- memset(&qh_list, 0, sizeof(qh_list));
- qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
- qh_list.qh_endpt1 = cpu_to_hc32((1 << 15) | (USB_SPEED_HIGH << 12));
- qh_list.qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
- qh_list.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
- qh_list.qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
- qh_list.qh_overlay.qt_token = cpu_to_hc32(0x40);
-
- /* Set async. queue head pointer. */
- ehci_writel(&hcor->or_asynclistaddr, (uint32_t)&qh_list);
+ memset(qh_list, 0, sizeof(*qh_list));
+ qh_list->qh_link = cpu_to_hc32((uint32_t)qh_list | QH_LINK_TYPE_QH);
+ qh_list->qh_endpt1 = cpu_to_hc32((1 << 15) | (USB_SPEED_HIGH << 12));
+ qh_list->qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
+ qh_list->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
+ qh_list->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
+ qh_list->qh_overlay.qt_token = cpu_to_hc32(0x40);
reg = ehci_readl(&hccr->cr_hcsparams);
descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
generated by cgit v1.2.3 (git 2.0.4) at 2025-08-02 09:08:44 +0000