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-rw-r--r--drivers/usb/gadget/composite.c1
-rw-r--r--drivers/usb/gadget/function/f_fs.c2
-rw-r--r--drivers/usb/gadget/function/f_uac2.c24
-rw-r--r--drivers/usb/gadget/function/u_audio.c88
-rw-r--r--drivers/usb/gadget/udc/aspeed-vhub/ep0.c11
-rw-r--r--drivers/usb/gadget/udc/aspeed-vhub/epn.c14
-rw-r--r--drivers/usb/gadget/udc/aspeed-vhub/vhub.h33
-rw-r--r--drivers/usb/gadget/udc/r8a66597-udc.c6
8 files changed, 103 insertions, 76 deletions
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index d2fa071c21b1..b8a15840b4ff 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1819,7 +1819,6 @@ unknown:
if (cdev->use_os_string && cdev->os_desc_config &&
(ctrl->bRequestType & USB_TYPE_VENDOR) &&
ctrl->bRequest == cdev->b_vendor_code) {
- struct usb_request *req;
struct usb_configuration *os_desc_cfg;
u8 *buf;
int interface;
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 33e2030503fa..3ada83d81bda 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -3263,7 +3263,7 @@ static int ffs_func_setup(struct usb_function *f,
__ffs_event_add(ffs, FUNCTIONFS_SETUP);
spin_unlock_irqrestore(&ffs->ev.waitq.lock, flags);
- return USB_GADGET_DELAYED_STATUS;
+ return creq->wLength == 0 ? USB_GADGET_DELAYED_STATUS : 0;
}
static bool ffs_func_req_match(struct usb_function *f,
diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index d2dc1f00180b..d582921f7257 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -438,14 +438,14 @@ static struct usb_descriptor_header *hs_audio_desc[] = {
};
struct cntrl_cur_lay3 {
- __u32 dCUR;
+ __le32 dCUR;
};
struct cntrl_range_lay3 {
- __u16 wNumSubRanges;
- __u32 dMIN;
- __u32 dMAX;
- __u32 dRES;
+ __le16 wNumSubRanges;
+ __le32 dMIN;
+ __le32 dMAX;
+ __le32 dRES;
} __packed;
static void set_ep_max_packet_size(const struct f_uac2_opts *uac2_opts,
@@ -559,13 +559,13 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
if (!agdev->out_ep) {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
- return ret;
+ return -ENODEV;
}
agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
if (!agdev->in_ep) {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
- return ret;
+ return -ENODEV;
}
agdev->in_ep_maxpsize = max_t(u16,
@@ -703,9 +703,9 @@ in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
memset(&c, 0, sizeof(struct cntrl_cur_lay3));
if (entity_id == USB_IN_CLK_ID)
- c.dCUR = p_srate;
+ c.dCUR = cpu_to_le32(p_srate);
else if (entity_id == USB_OUT_CLK_ID)
- c.dCUR = c_srate;
+ c.dCUR = cpu_to_le32(c_srate);
value = min_t(unsigned, w_length, sizeof c);
memcpy(req->buf, &c, value);
@@ -742,15 +742,15 @@ in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr)
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
if (entity_id == USB_IN_CLK_ID)
- r.dMIN = p_srate;
+ r.dMIN = cpu_to_le32(p_srate);
else if (entity_id == USB_OUT_CLK_ID)
- r.dMIN = c_srate;
+ r.dMIN = cpu_to_le32(c_srate);
else
return -EOPNOTSUPP;
r.dMAX = r.dMIN;
r.dRES = 0;
- r.wNumSubRanges = 1;
+ r.wNumSubRanges = cpu_to_le16(1);
value = min_t(unsigned, w_length, sizeof r);
memcpy(req->buf, &r, value);
diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c
index a72295c953bb..fb5ed97572e5 100644
--- a/drivers/usb/gadget/function/u_audio.c
+++ b/drivers/usb/gadget/function/u_audio.c
@@ -32,9 +32,6 @@ struct uac_req {
struct uac_rtd_params {
struct snd_uac_chip *uac; /* parent chip */
bool ep_enabled; /* if the ep is enabled */
- /* Size of the ring buffer */
- size_t dma_bytes;
- unsigned char *dma_area;
struct snd_pcm_substream *ss;
@@ -43,8 +40,6 @@ struct uac_rtd_params {
void *rbuf;
- size_t period_size;
-
unsigned max_psize; /* MaxPacketSize of endpoint */
struct uac_req *ureq;
@@ -84,12 +79,12 @@ static const struct snd_pcm_hardware uac_pcm_hardware = {
static void u_audio_iso_complete(struct usb_ep *ep, struct usb_request *req)
{
unsigned pending;
- unsigned long flags;
+ unsigned long flags, flags2;
unsigned int hw_ptr;
- bool update_alsa = false;
int status = req->status;
struct uac_req *ur = req->context;
struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
struct uac_rtd_params *prm = ur->pp;
struct snd_uac_chip *uac = prm->uac;
@@ -111,6 +106,14 @@ static void u_audio_iso_complete(struct usb_ep *ep, struct usb_request *req)
if (!substream)
goto exit;
+ snd_pcm_stream_lock_irqsave(substream, flags2);
+
+ runtime = substream->runtime;
+ if (!runtime || !snd_pcm_running(substream)) {
+ snd_pcm_stream_unlock_irqrestore(substream, flags2);
+ goto exit;
+ }
+
spin_lock_irqsave(&prm->lock, flags);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
@@ -137,43 +140,46 @@ static void u_audio_iso_complete(struct usb_ep *ep, struct usb_request *req)
req->actual = req->length;
}
- pending = prm->hw_ptr % prm->period_size;
- pending += req->actual;
- if (pending >= prm->period_size)
- update_alsa = true;
-
hw_ptr = prm->hw_ptr;
- prm->hw_ptr = (prm->hw_ptr + req->actual) % prm->dma_bytes;
spin_unlock_irqrestore(&prm->lock, flags);
/* Pack USB load in ALSA ring buffer */
- pending = prm->dma_bytes - hw_ptr;
+ pending = runtime->dma_bytes - hw_ptr;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (unlikely(pending < req->actual)) {
- memcpy(req->buf, prm->dma_area + hw_ptr, pending);
- memcpy(req->buf + pending, prm->dma_area,
+ memcpy(req->buf, runtime->dma_area + hw_ptr, pending);
+ memcpy(req->buf + pending, runtime->dma_area,
req->actual - pending);
} else {
- memcpy(req->buf, prm->dma_area + hw_ptr, req->actual);
+ memcpy(req->buf, runtime->dma_area + hw_ptr,
+ req->actual);
}
} else {
if (unlikely(pending < req->actual)) {
- memcpy(prm->dma_area + hw_ptr, req->buf, pending);
- memcpy(prm->dma_area, req->buf + pending,
+ memcpy(runtime->dma_area + hw_ptr, req->buf, pending);
+ memcpy(runtime->dma_area, req->buf + pending,
req->actual - pending);
} else {
- memcpy(prm->dma_area + hw_ptr, req->buf, req->actual);
+ memcpy(runtime->dma_area + hw_ptr, req->buf,
+ req->actual);
}
}
+ spin_lock_irqsave(&prm->lock, flags);
+ /* update hw_ptr after data is copied to memory */
+ prm->hw_ptr = (hw_ptr + req->actual) % runtime->dma_bytes;
+ hw_ptr = prm->hw_ptr;
+ spin_unlock_irqrestore(&prm->lock, flags);
+ snd_pcm_stream_unlock_irqrestore(substream, flags2);
+
+ if ((hw_ptr % snd_pcm_lib_period_bytes(substream)) < req->actual)
+ snd_pcm_period_elapsed(substream);
+
exit:
if (usb_ep_queue(ep, req, GFP_ATOMIC))
dev_err(uac->card->dev, "%d Error!\n", __LINE__);
-
- if (update_alsa)
- snd_pcm_period_elapsed(substream);
}
static int uac_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
@@ -236,40 +242,12 @@ static snd_pcm_uframes_t uac_pcm_pointer(struct snd_pcm_substream *substream)
static int uac_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
- struct snd_uac_chip *uac = snd_pcm_substream_chip(substream);
- struct uac_rtd_params *prm;
- int err;
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- prm = &uac->p_prm;
- else
- prm = &uac->c_prm;
-
- err = snd_pcm_lib_malloc_pages(substream,
+ return snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
- if (err >= 0) {
- prm->dma_bytes = substream->runtime->dma_bytes;
- prm->dma_area = substream->runtime->dma_area;
- prm->period_size = params_period_bytes(hw_params);
- }
-
- return err;
}
static int uac_pcm_hw_free(struct snd_pcm_substream *substream)
{
- struct snd_uac_chip *uac = snd_pcm_substream_chip(substream);
- struct uac_rtd_params *prm;
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- prm = &uac->p_prm;
- else
- prm = &uac->c_prm;
-
- prm->dma_area = NULL;
- prm->dma_bytes = 0;
- prm->period_size = 0;
-
return snd_pcm_lib_free_pages(substream);
}
@@ -595,15 +573,15 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
if (err < 0)
goto snd_fail;
- strcpy(pcm->name, pcm_name);
+ strlcpy(pcm->name, pcm_name, sizeof(pcm->name));
pcm->private_data = uac;
uac->pcm = pcm;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &uac_pcm_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &uac_pcm_ops);
- strcpy(card->driver, card_name);
- strcpy(card->shortname, card_name);
+ strlcpy(card->driver, card_name, sizeof(card->driver));
+ strlcpy(card->shortname, card_name, sizeof(card->shortname));
sprintf(card->longname, "%s %i", card_name, card->dev->id);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
index 20ffb03ff6ac..e2927fb083cf 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
@@ -108,6 +108,13 @@ void ast_vhub_ep0_handle_setup(struct ast_vhub_ep *ep)
/* Check our state, cancel pending requests if needed */
if (ep->ep0.state != ep0_state_token) {
EPDBG(ep, "wrong state\n");
+ ast_vhub_nuke(ep, -EIO);
+
+ /*
+ * Accept the packet regardless, this seems to happen
+ * when stalling a SETUP packet that has an OUT data
+ * phase.
+ */
ast_vhub_nuke(ep, 0);
goto stall;
}
@@ -212,6 +219,8 @@ static void ast_vhub_ep0_do_send(struct ast_vhub_ep *ep,
if (chunk && req->req.buf)
memcpy(ep->buf, req->req.buf + req->req.actual, chunk);
+ vhub_dma_workaround(ep->buf);
+
/* Remember chunk size and trigger send */
reg = VHUB_EP0_SET_TX_LEN(chunk);
writel(reg, ep->ep0.ctlstat);
@@ -224,7 +233,7 @@ static void ast_vhub_ep0_rx_prime(struct ast_vhub_ep *ep)
EPVDBG(ep, "rx prime\n");
/* Prime endpoint for receiving data */
- writel(VHUB_EP0_RX_BUFF_RDY, ep->ep0.ctlstat + AST_VHUB_EP0_CTRL);
+ writel(VHUB_EP0_RX_BUFF_RDY, ep->ep0.ctlstat);
}
static void ast_vhub_ep0_do_receive(struct ast_vhub_ep *ep, struct ast_vhub_req *req,
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index 80c9feac5147..5939eb1e97f2 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -66,11 +66,16 @@ static void ast_vhub_epn_kick(struct ast_vhub_ep *ep, struct ast_vhub_req *req)
if (!req->req.dma) {
/* For IN transfers, copy data over first */
- if (ep->epn.is_in)
+ if (ep->epn.is_in) {
memcpy(ep->buf, req->req.buf + act, chunk);
+ vhub_dma_workaround(ep->buf);
+ }
writel(ep->buf_dma, ep->epn.regs + AST_VHUB_EP_DESC_BASE);
- } else
+ } else {
+ if (ep->epn.is_in)
+ vhub_dma_workaround(req->req.buf);
writel(req->req.dma + act, ep->epn.regs + AST_VHUB_EP_DESC_BASE);
+ }
/* Start DMA */
req->active = true;
@@ -161,6 +166,7 @@ static inline unsigned int ast_vhub_count_free_descs(struct ast_vhub_ep *ep)
static void ast_vhub_epn_kick_desc(struct ast_vhub_ep *ep,
struct ast_vhub_req *req)
{
+ struct ast_vhub_desc *desc = NULL;
unsigned int act = req->act_count;
unsigned int len = req->req.length;
unsigned int chunk;
@@ -177,7 +183,6 @@ static void ast_vhub_epn_kick_desc(struct ast_vhub_ep *ep,
/* While we can create descriptors */
while (ast_vhub_count_free_descs(ep) && req->last_desc < 0) {
- struct ast_vhub_desc *desc;
unsigned int d_num;
/* Grab next free descriptor */
@@ -227,6 +232,9 @@ static void ast_vhub_epn_kick_desc(struct ast_vhub_ep *ep,
req->act_count = act = act + chunk;
}
+ if (likely(desc))
+ vhub_dma_workaround(desc);
+
/* Tell HW about new descriptors */
writel(VHUB_EP_DMA_SET_CPU_WPTR(ep->epn.d_next),
ep->epn.regs + AST_VHUB_EP_DESC_STATUS);
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
index 2b040257bc1f..4ed03d33a5a9 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
+++ b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
@@ -462,6 +462,39 @@ enum std_req_rc {
#define DDBG(d, fmt, ...) do { } while(0)
#endif
+static inline void vhub_dma_workaround(void *addr)
+{
+ /*
+ * This works around a confirmed HW issue with the Aspeed chip.
+ *
+ * The core uses a different bus to memory than the AHB going to
+ * the USB device controller. Due to the latter having a higher
+ * priority than the core for arbitration on that bus, it's
+ * possible for an MMIO to the device, followed by a DMA by the
+ * device from memory to all be performed and services before
+ * a previous store to memory gets completed.
+ *
+ * This the following scenario can happen:
+ *
+ * - Driver writes to a DMA descriptor (Mbus)
+ * - Driver writes to the MMIO register to start the DMA (AHB)
+ * - The gadget sees the second write and sends a read of the
+ * descriptor to the memory controller (Mbus)
+ * - The gadget hits memory before the descriptor write
+ * causing it to read an obsolete value.
+ *
+ * Thankfully the problem is limited to the USB gadget device, other
+ * masters in the SoC all have a lower priority than the core, thus
+ * ensuring that the store by the core arrives first.
+ *
+ * The workaround consists of using a dummy read of the memory before
+ * doing the MMIO writes. This will ensure that the previous writes
+ * have been "pushed out".
+ */
+ mb();
+ (void)__raw_readl((void __iomem *)addr);
+}
+
/* core.c */
void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req,
int status);
diff --git a/drivers/usb/gadget/udc/r8a66597-udc.c b/drivers/usb/gadget/udc/r8a66597-udc.c
index a3ecce62662b..11e25a3f4f1f 100644
--- a/drivers/usb/gadget/udc/r8a66597-udc.c
+++ b/drivers/usb/gadget/udc/r8a66597-udc.c
@@ -832,11 +832,11 @@ static void init_controller(struct r8a66597 *r8a66597)
r8a66597_bset(r8a66597, XCKE, SYSCFG0);
- msleep(3);
+ mdelay(3);
r8a66597_bset(r8a66597, PLLC, SYSCFG0);
- msleep(1);
+ mdelay(1);
r8a66597_bset(r8a66597, SCKE, SYSCFG0);
@@ -1190,7 +1190,7 @@ __acquires(r8a66597->lock)
r8a66597->ep0_req->length = 2;
/* AV: what happens if we get called again before that gets through? */
spin_unlock(&r8a66597->lock);
- r8a66597_queue(r8a66597->gadget.ep0, r8a66597->ep0_req, GFP_KERNEL);
+ r8a66597_queue(r8a66597->gadget.ep0, r8a66597->ep0_req, GFP_ATOMIC);
spin_lock(&r8a66597->lock);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.