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path: root/drivers/usb/musb
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Diffstat (limited to 'drivers/usb/musb')
-rw-r--r--drivers/usb/musb/Kconfig2
-rw-r--r--drivers/usb/musb/musb_core.c5
-rw-r--r--drivers/usb/musb/musb_cppi41.c69
-rw-r--r--drivers/usb/musb/musb_dsps.c58
-rw-r--r--drivers/usb/musb/musb_host.c30
5 files changed, 153 insertions, 11 deletions
diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index 688dc8b..8b78979 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -43,6 +43,7 @@ config USB_MUSB_HOST
config USB_MUSB_GADGET
bool "Gadget only mode"
depends on USB_GADGET=y || USB_GADGET=USB_MUSB_HDRC
+ depends on HAS_DMA
help
Select this when you want to use MUSB in gadget mode only,
thereby the host feature will be regressed.
@@ -50,6 +51,7 @@ config USB_MUSB_GADGET
config USB_MUSB_DUAL_ROLE
bool "Dual Role mode"
depends on ((USB=y || USB=USB_MUSB_HDRC) && (USB_GADGET=y || USB_GADGET=USB_MUSB_HDRC))
+ depends on HAS_DMA
help
This is the default mode of working of MUSB controller where
both host and gadget features are enabled.
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 239ad0b..0757690 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -438,7 +438,6 @@ void musb_hnp_stop(struct musb *musb)
static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
u8 devctl)
{
- struct usb_otg *otg = musb->xceiv->otg;
irqreturn_t handled = IRQ_NONE;
dev_dbg(musb->controller, "<== DevCtl=%02x, int_usb=0x%x\n", devctl,
@@ -656,7 +655,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
break;
case OTG_STATE_B_PERIPHERAL:
musb_g_suspend(musb);
- musb->is_active = otg->gadget->b_hnp_enable;
+ musb->is_active = musb->g.b_hnp_enable;
if (musb->is_active) {
musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
dev_dbg(musb->controller, "HNP: Setting timer for b_ase0_brst\n");
@@ -672,7 +671,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
break;
case OTG_STATE_A_HOST:
musb->xceiv->state = OTG_STATE_A_SUSPEND;
- musb->is_active = otg->host->b_hnp_enable;
+ musb->is_active = musb->hcd->self.b_hnp_enable;
break;
case OTG_STATE_B_HOST:
/* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index f889296..7b8bbf5 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -39,6 +39,7 @@ struct cppi41_dma_channel {
u32 transferred;
u32 packet_sz;
struct list_head tx_check;
+ struct work_struct dma_completion;
};
#define MUSB_DMA_NUM_CHANNELS 15
@@ -112,6 +113,18 @@ static bool musb_is_tx_fifo_empty(struct musb_hw_ep *hw_ep)
return true;
}
+static bool is_isoc(struct musb_hw_ep *hw_ep, bool in)
+{
+ if (in && hw_ep->in_qh) {
+ if (hw_ep->in_qh->type == USB_ENDPOINT_XFER_ISOC)
+ return true;
+ } else if (hw_ep->out_qh) {
+ if (hw_ep->out_qh->type == USB_ENDPOINT_XFER_ISOC)
+ return true;
+ }
+ return false;
+}
+
static void cppi41_dma_callback(void *private_data);
static void cppi41_trans_done(struct cppi41_dma_channel *cppi41_channel)
@@ -119,7 +132,8 @@ static void cppi41_trans_done(struct cppi41_dma_channel *cppi41_channel)
struct musb_hw_ep *hw_ep = cppi41_channel->hw_ep;
struct musb *musb = hw_ep->musb;
- if (!cppi41_channel->prog_len) {
+ if (!cppi41_channel->prog_len ||
+ (cppi41_channel->channel.status == MUSB_DMA_STATUS_FREE)) {
/* done, complete */
cppi41_channel->channel.actual_len =
@@ -165,6 +179,32 @@ static void cppi41_trans_done(struct cppi41_dma_channel *cppi41_channel)
}
}
+static void cppi_trans_done_work(struct work_struct *work)
+{
+ unsigned long flags;
+ struct cppi41_dma_channel *cppi41_channel =
+ container_of(work, struct cppi41_dma_channel, dma_completion);
+ struct cppi41_dma_controller *controller = cppi41_channel->controller;
+ struct musb *musb = controller->musb;
+ struct musb_hw_ep *hw_ep = cppi41_channel->hw_ep;
+ bool empty;
+
+ if (!cppi41_channel->is_tx && is_isoc(hw_ep, 1)) {
+ spin_lock_irqsave(&musb->lock, flags);
+ cppi41_trans_done(cppi41_channel);
+ spin_unlock_irqrestore(&musb->lock, flags);
+ } else {
+ empty = musb_is_tx_fifo_empty(hw_ep);
+ if (empty) {
+ spin_lock_irqsave(&musb->lock, flags);
+ cppi41_trans_done(cppi41_channel);
+ spin_unlock_irqrestore(&musb->lock, flags);
+ } else {
+ schedule_work(&cppi41_channel->dma_completion);
+ }
+ }
+}
+
static enum hrtimer_restart cppi41_recheck_tx_req(struct hrtimer *timer)
{
struct cppi41_dma_controller *controller;
@@ -228,6 +268,14 @@ static void cppi41_dma_callback(void *private_data)
transferred < cppi41_channel->packet_sz)
cppi41_channel->prog_len = 0;
+ if (!cppi41_channel->is_tx) {
+ if (is_isoc(hw_ep, 1))
+ schedule_work(&cppi41_channel->dma_completion);
+ else
+ cppi41_trans_done(cppi41_channel);
+ goto out;
+ }
+
empty = musb_is_tx_fifo_empty(hw_ep);
if (empty) {
cppi41_trans_done(cppi41_channel);
@@ -264,6 +312,10 @@ static void cppi41_dma_callback(void *private_data)
goto out;
}
}
+ if (is_isoc(hw_ep, 0)) {
+ schedule_work(&cppi41_channel->dma_completion);
+ goto out;
+ }
list_add_tail(&cppi41_channel->tx_check,
&controller->early_tx_list);
if (!hrtimer_active(&controller->early_tx)) {
@@ -448,12 +500,25 @@ static int cppi41_dma_channel_program(struct dma_channel *channel,
dma_addr_t dma_addr, u32 len)
{
int ret;
+ struct cppi41_dma_channel *cppi41_channel = channel->private_data;
+ int hb_mult = 0;
BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN ||
channel->status == MUSB_DMA_STATUS_BUSY);
+ if (is_host_active(cppi41_channel->controller->musb)) {
+ if (cppi41_channel->is_tx)
+ hb_mult = cppi41_channel->hw_ep->out_qh->hb_mult;
+ else
+ hb_mult = cppi41_channel->hw_ep->in_qh->hb_mult;
+ }
+
channel->status = MUSB_DMA_STATUS_BUSY;
channel->actual_len = 0;
+
+ if (hb_mult)
+ packet_sz = hb_mult * (packet_sz & 0x7FF);
+
ret = cppi41_configure_channel(channel, packet_sz, mode, dma_addr, len);
if (!ret)
channel->status = MUSB_DMA_STATUS_FREE;
@@ -607,6 +672,8 @@ static int cppi41_dma_controller_start(struct cppi41_dma_controller *controller)
cppi41_channel->port_num = port;
cppi41_channel->is_tx = is_tx;
INIT_LIST_HEAD(&cppi41_channel->tx_check);
+ INIT_WORK(&cppi41_channel->dma_completion,
+ cppi_trans_done_work);
musb_dma = &cppi41_channel->channel;
musb_dma->private_data = cppi41_channel;
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 7a109ea..3372ded 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -45,6 +45,8 @@
#include <linux/of_irq.h>
#include <linux/usb/of.h>
+#include <linux/debugfs.h>
+
#include "musb_core.h"
static const struct of_device_id musb_dsps_of_match[];
@@ -136,6 +138,26 @@ struct dsps_glue {
unsigned long last_timer; /* last timer data for each instance */
struct dsps_context context;
+ struct debugfs_regset32 regset;
+ struct dentry *dbgfs_root;
+};
+
+static const struct debugfs_reg32 dsps_musb_regs[] = {
+ { "revision", 0x00 },
+ { "control", 0x14 },
+ { "status", 0x18 },
+ { "eoi", 0x24 },
+ { "intr0_stat", 0x30 },
+ { "intr1_stat", 0x34 },
+ { "intr0_set", 0x38 },
+ { "intr1_set", 0x3c },
+ { "txmode", 0x70 },
+ { "rxmode", 0x74 },
+ { "autoreq", 0xd0 },
+ { "srpfixtime", 0xd4 },
+ { "tdown", 0xd8 },
+ { "phy_utmi", 0xe0 },
+ { "mode", 0xe8 },
};
static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
@@ -368,6 +390,30 @@ out:
return ret;
}
+static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
+{
+ struct dentry *root;
+ struct dentry *file;
+ char buf[128];
+
+ sprintf(buf, "%s.dsps", dev_name(musb->controller));
+ root = debugfs_create_dir(buf, NULL);
+ if (!root)
+ return -ENOMEM;
+ glue->dbgfs_root = root;
+
+ glue->regset.regs = dsps_musb_regs;
+ glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
+ glue->regset.base = musb->ctrl_base;
+
+ file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
+ if (!file) {
+ debugfs_remove_recursive(root);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
static int dsps_musb_init(struct musb *musb)
{
struct device *dev = musb->controller;
@@ -377,6 +423,7 @@ static int dsps_musb_init(struct musb *musb)
void __iomem *reg_base;
struct resource *r;
u32 rev, val;
+ int ret;
r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control");
if (!r)
@@ -410,6 +457,10 @@ static int dsps_musb_init(struct musb *musb)
val &= ~(1 << wrp->otg_disable);
dsps_writel(musb->ctrl_base, wrp->phy_utmi, val);
+ ret = dsps_musb_dbg_init(musb, glue);
+ if (ret)
+ return ret;
+
return 0;
}
@@ -616,7 +667,7 @@ static int dsps_probe(struct platform_device *pdev)
wrp = match->data;
/* allocate glue */
- glue = kzalloc(sizeof(*glue), GFP_KERNEL);
+ glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
if (!glue) {
dev_err(&pdev->dev, "unable to allocate glue memory\n");
return -ENOMEM;
@@ -644,7 +695,6 @@ err3:
pm_runtime_put(&pdev->dev);
err2:
pm_runtime_disable(&pdev->dev);
- kfree(glue);
return ret;
}
@@ -657,7 +707,9 @@ static int dsps_remove(struct platform_device *pdev)
/* disable usbss clocks */
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
- kfree(glue);
+
+ debugfs_remove_recursive(glue->dbgfs_root);
+
return 0;
}
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index abb38c3..eb06291 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1694,7 +1694,8 @@ void musb_host_rx(struct musb *musb, u8 epnum)
| MUSB_RXCSR_RXPKTRDY);
musb_writew(hw_ep->regs, MUSB_RXCSR, val);
-#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA)
+#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA) || \
+ defined(CONFIG_USB_TI_CPPI41_DMA)
if (usb_pipeisoc(pipe)) {
struct usb_iso_packet_descriptor *d;
@@ -1707,10 +1708,30 @@ void musb_host_rx(struct musb *musb, u8 epnum)
if (d->status != -EILSEQ && d->status != -EOVERFLOW)
d->status = 0;
- if (++qh->iso_idx >= urb->number_of_packets)
+ if (++qh->iso_idx >= urb->number_of_packets) {
done = true;
- else
+ } else {
+#if defined(CONFIG_USB_TI_CPPI41_DMA)
+ struct dma_controller *c;
+ dma_addr_t *buf;
+ u32 length, ret;
+
+ c = musb->dma_controller;
+ buf = (void *)
+ urb->iso_frame_desc[qh->iso_idx].offset
+ + (u32)urb->transfer_dma;
+
+ length =
+ urb->iso_frame_desc[qh->iso_idx].length;
+
+ val |= MUSB_RXCSR_DMAENAB;
+ musb_writew(hw_ep->regs, MUSB_RXCSR, val);
+
+ ret = c->channel_program(dma, qh->maxpacket,
+ 0, (u32) buf, length);
+#endif
done = false;
+ }
} else {
/* done if urb buffer is full or short packet is recd */
@@ -1750,7 +1771,8 @@ void musb_host_rx(struct musb *musb, u8 epnum)
}
/* we are expecting IN packets */
-#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA)
+#if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_UX500_DMA) || \
+ defined(CONFIG_USB_TI_CPPI41_DMA)
if (dma) {
struct dma_controller *c;
u16 rx_count;
generated by cgit v0.10.2 at 2024-10-31 02:18:54 (GMT)