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* [PATCH v2 0/5] aspeed-g6: enable usb support
@ 2020-02-12 21:57 rentao.bupt
  2020-02-12 21:57 ` [PATCH v2 1/5] usb: gadget: aspeed: read vhub properties from device tree rentao.bupt
                   ` (4 more replies)
  0 siblings, 5 replies; 8+ messages in thread
From: rentao.bupt @ 2020-02-12 21:57 UTC (permalink / raw)
  To: Felipe Balbi, Greg Kroah-Hartman, Joel Stanley, Andrew Jeffery,
	Benjamin Herrenschmidt, Chunfeng Yun, Colin Ian King,
	Stephen Boyd, Rob Herring, Mark Rutland, linux-usb,
	linux-arm-kernel, linux-aspeed, devicetree, linux-kernel,
	openbmc, taoren
  Cc: Tao Ren

From: Tao Ren <rentao.bupt@gmail.com>

The patch series aims at enabling USB Host and Gadget support on AST2600
platforms.

Patch #1 replaces hardcoded vhub port/endpoint number with device tree
properties, so that it's more convenient to add support for ast2600-vhub
which provides more downstream ports and endpoints.

Patch #2 and #3 add vhub port/endpoint properties into aspeed-g4 and
aspeed-g5 dtsi.

Patch #4 enables ast2600 support in aspeed-vhub usb gadget driver.

Patch #5 adds USB devices and according pin groups in aspeed-g6 dtsi.

The patch series is sanity tested on AST2520 (Yamp) BMC and AST2600-A0
eval board:
  - AST2520: created 5 gadget devices with 15 endpoints, and all of them
    can be enumerated from usb-host side.
  - AST2600: created 7 gadget devices with 20 endpoints, and all of them
    can be enumerated from usb-host side.

Tao Ren (5):
  usb: gadget: aspeed: read vhub properties from device tree
  ARM: dts: aspeed-g4: add vhub port and endpoint properties
  ARM: dts: aspeed-g5: add vhub port and endpoint properties
  usb: gadget: aspeed: add ast2600 vhub support
  ARM: dts: aspeed-g6: add usb functions

 arch/arm/boot/dts/aspeed-g4.dtsi           |  2 +
 arch/arm/boot/dts/aspeed-g5.dtsi           |  2 +
 arch/arm/boot/dts/aspeed-g6-pinctrl.dtsi   | 25 ++++++++
 arch/arm/boot/dts/aspeed-g6.dtsi           | 45 ++++++++++++++
 drivers/usb/gadget/udc/aspeed-vhub/Kconfig |  4 +-
 drivers/usb/gadget/udc/aspeed-vhub/core.c  | 71 ++++++++++++++--------
 drivers/usb/gadget/udc/aspeed-vhub/dev.c   | 30 ++++++---
 drivers/usb/gadget/udc/aspeed-vhub/epn.c   |  4 +-
 drivers/usb/gadget/udc/aspeed-vhub/hub.c   | 26 +++++---
 drivers/usb/gadget/udc/aspeed-vhub/vhub.h  | 23 +++----
 10 files changed, 170 insertions(+), 62 deletions(-)

-- 
2.17.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 1/5] usb: gadget: aspeed: read vhub properties from device tree
  2020-02-12 21:57 [PATCH v2 0/5] aspeed-g6: enable usb support rentao.bupt
@ 2020-02-12 21:57 ` rentao.bupt
  2020-02-16 23:48   ` Andrew Jeffery
  2020-02-12 21:57 ` [PATCH v2 2/5] ARM: dts: aspeed-g4: add vhub port and endpoint properties rentao.bupt
                   ` (3 subsequent siblings)
  4 siblings, 1 reply; 8+ messages in thread
From: rentao.bupt @ 2020-02-12 21:57 UTC (permalink / raw)
  To: Felipe Balbi, Greg Kroah-Hartman, Joel Stanley, Andrew Jeffery,
	Benjamin Herrenschmidt, Chunfeng Yun, Colin Ian King,
	Stephen Boyd, Rob Herring, Mark Rutland, linux-usb,
	linux-arm-kernel, linux-aspeed, devicetree, linux-kernel,
	openbmc, taoren
  Cc: Tao Ren

From: Tao Ren <rentao.bupt@gmail.com>

The patch introduces 2 DT properties ("aspeed,vhub-downstream-ports" and
"aspeed,vhub-generic-endpoints") which replaces hardcoded port/endpoint
number. It is to make it more convenient to add support for newer vhub
revisions with different number of ports and endpoints.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
---
 Changes in v2:
   - removed ast_vhub_config structure and moved vhub port/endpoint
     number into device tree.

 drivers/usb/gadget/udc/aspeed-vhub/core.c | 68 ++++++++++++++---------
 drivers/usb/gadget/udc/aspeed-vhub/dev.c  | 30 +++++++---
 drivers/usb/gadget/udc/aspeed-vhub/epn.c  |  4 +-
 drivers/usb/gadget/udc/aspeed-vhub/hub.c  | 26 ++++++---
 drivers/usb/gadget/udc/aspeed-vhub/vhub.h | 23 +++-----
 5 files changed, 91 insertions(+), 60 deletions(-)

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c
index 90b134d5dca9..d6f737fac4e2 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
@@ -99,7 +99,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
 {
 	struct ast_vhub *vhub = data;
 	irqreturn_t iret = IRQ_NONE;
-	u32 istat;
+	u32 i, istat;
 
 	/* Stale interrupt while tearing down */
 	if (!vhub->ep0_bufs)
@@ -121,10 +121,10 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
 
 	/* Handle generic EPs first */
 	if (istat & VHUB_IRQ_EP_POOL_ACK_STALL) {
-		u32 i, ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR);
+		u32 ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR);
 		writel(ep_acks, vhub->regs + AST_VHUB_EP_ACK_ISR);
 
-		for (i = 0; ep_acks && i < AST_VHUB_NUM_GEN_EPs; i++) {
+		for (i = 0; ep_acks && i < vhub->max_epns; i++) {
 			u32 mask = VHUB_EP_IRQ(i);
 			if (ep_acks & mask) {
 				ast_vhub_epn_ack_irq(&vhub->epns[i]);
@@ -134,21 +134,11 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
 	}
 
 	/* Handle device interrupts */
-	if (istat & (VHUB_IRQ_DEVICE1 |
-		     VHUB_IRQ_DEVICE2 |
-		     VHUB_IRQ_DEVICE3 |
-		     VHUB_IRQ_DEVICE4 |
-		     VHUB_IRQ_DEVICE5)) {
-		if (istat & VHUB_IRQ_DEVICE1)
-			ast_vhub_dev_irq(&vhub->ports[0].dev);
-		if (istat & VHUB_IRQ_DEVICE2)
-			ast_vhub_dev_irq(&vhub->ports[1].dev);
-		if (istat & VHUB_IRQ_DEVICE3)
-			ast_vhub_dev_irq(&vhub->ports[2].dev);
-		if (istat & VHUB_IRQ_DEVICE4)
-			ast_vhub_dev_irq(&vhub->ports[3].dev);
-		if (istat & VHUB_IRQ_DEVICE5)
-			ast_vhub_dev_irq(&vhub->ports[4].dev);
+	for (i = 0; i < vhub->max_ports; i++) {
+		u32 dev_mask = VHUB_IRQ_DEVICE1 << i;
+
+		if (istat & dev_mask)
+			ast_vhub_dev_irq(&vhub->ports[i].dev);
 	}
 
 	/* Handle top-level vHub EP0 interrupts */
@@ -182,7 +172,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
 
 void ast_vhub_init_hw(struct ast_vhub *vhub)
 {
-	u32 ctrl;
+	u32 ctrl, port_mask, epn_mask;
 
 	UDCDBG(vhub,"(Re)Starting HW ...\n");
 
@@ -222,15 +212,20 @@ void ast_vhub_init_hw(struct ast_vhub *vhub)
 	}
 
 	/* Reset all devices */
-	writel(VHUB_SW_RESET_ALL, vhub->regs + AST_VHUB_SW_RESET);
+	port_mask = GENMASK(vhub->max_ports, 1);
+	writel(VHUB_SW_RESET_ROOT_HUB |
+	       VHUB_SW_RESET_DMA_CONTROLLER |
+	       VHUB_SW_RESET_EP_POOL |
+	       port_mask, vhub->regs + AST_VHUB_SW_RESET);
 	udelay(1);
 	writel(0, vhub->regs + AST_VHUB_SW_RESET);
 
 	/* Disable and cleanup EP ACK/NACK interrupts */
+	epn_mask = GENMASK(vhub->max_epns - 1, 0);
 	writel(0, vhub->regs + AST_VHUB_EP_ACK_IER);
 	writel(0, vhub->regs + AST_VHUB_EP_NACK_IER);
-	writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_ACK_ISR);
-	writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_NACK_ISR);
+	writel(epn_mask, vhub->regs + AST_VHUB_EP_ACK_ISR);
+	writel(epn_mask, vhub->regs + AST_VHUB_EP_NACK_ISR);
 
 	/* Default settings for EP0, enable HW hub EP1 */
 	writel(0, vhub->regs + AST_VHUB_EP0_CTRL);
@@ -273,7 +268,7 @@ static int ast_vhub_remove(struct platform_device *pdev)
 		return 0;
 
 	/* Remove devices */
-	for (i = 0; i < AST_VHUB_NUM_PORTS; i++)
+	for (i = 0; i < vhub->max_ports; i++)
 		ast_vhub_del_dev(&vhub->ports[i].dev);
 
 	spin_lock_irqsave(&vhub->lock, flags);
@@ -295,7 +290,7 @@ static int ast_vhub_remove(struct platform_device *pdev)
 	if (vhub->ep0_bufs)
 		dma_free_coherent(&pdev->dev,
 				  AST_VHUB_EP0_MAX_PACKET *
-				  (AST_VHUB_NUM_PORTS + 1),
+				  (vhub->max_ports + 1),
 				  vhub->ep0_bufs,
 				  vhub->ep0_bufs_dma);
 	vhub->ep0_bufs = NULL;
@@ -309,11 +304,32 @@ static int ast_vhub_probe(struct platform_device *pdev)
 	struct ast_vhub *vhub;
 	struct resource *res;
 	int i, rc = 0;
+	const struct device_node *np = pdev->dev.of_node;
 
 	vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL);
 	if (!vhub)
 		return -ENOMEM;
 
+	rc = of_property_read_u32(np, "aspeed,vhub-downstream-ports",
+				  &vhub->max_ports);
+	if (rc < 0)
+		return -ENODEV;
+
+	vhub->ports = devm_kcalloc(&pdev->dev, vhub->max_ports,
+				   sizeof(*vhub->ports), GFP_KERNEL);
+	if (!vhub->ports)
+		return -ENOMEM;
+
+	rc = of_property_read_u32(np, "aspeed,vhub-generic-endpoints",
+				  &vhub->max_epns);
+	if (rc < 0)
+		return -ENODEV;
+
+	vhub->epns = devm_kcalloc(&pdev->dev, vhub->max_epns,
+				  sizeof(*vhub->epns), GFP_KERNEL);
+	if (!vhub->epns)
+		return -ENOMEM;
+
 	spin_lock_init(&vhub->lock);
 	vhub->pdev = pdev;
 
@@ -366,7 +382,7 @@ static int ast_vhub_probe(struct platform_device *pdev)
 	 */
 	vhub->ep0_bufs = dma_alloc_coherent(&pdev->dev,
 					    AST_VHUB_EP0_MAX_PACKET *
-					    (AST_VHUB_NUM_PORTS + 1),
+					    (vhub->max_ports + 1),
 					    &vhub->ep0_bufs_dma, GFP_KERNEL);
 	if (!vhub->ep0_bufs) {
 		dev_err(&pdev->dev, "Failed to allocate EP0 DMA buffers\n");
@@ -380,7 +396,7 @@ static int ast_vhub_probe(struct platform_device *pdev)
 	ast_vhub_init_ep0(vhub, &vhub->ep0, NULL);
 
 	/* Init devices */
-	for (i = 0; i < AST_VHUB_NUM_PORTS && rc == 0; i++)
+	for (i = 0; i < vhub->max_ports && rc == 0; i++)
 		rc = ast_vhub_init_dev(vhub, i);
 	if (rc)
 		goto err;
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
index 4008e7a51188..d268306a7bfe 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
@@ -77,7 +77,7 @@ static void ast_vhub_dev_enable(struct ast_vhub_dev *d)
 	writel(d->ep0.buf_dma, d->regs + AST_VHUB_DEV_EP0_DATA);
 
 	/* Clear stall on all EPs */
-	for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) {
+	for (i = 0; i < d->max_epns; i++) {
 		struct ast_vhub_ep *ep = d->epns[i];
 
 		if (ep && (ep->epn.stalled || ep->epn.wedged)) {
@@ -137,7 +137,7 @@ static int ast_vhub_ep_feature(struct ast_vhub_dev *d,
 	     is_set ? "SET" : "CLEAR", ep_num, wValue);
 	if (ep_num == 0)
 		return std_req_complete;
-	if (ep_num >= AST_VHUB_NUM_GEN_EPs || !d->epns[ep_num - 1])
+	if (ep_num >= d->max_epns || !d->epns[ep_num - 1])
 		return std_req_stall;
 	if (wValue != USB_ENDPOINT_HALT)
 		return std_req_driver;
@@ -181,7 +181,7 @@ static int ast_vhub_ep_status(struct ast_vhub_dev *d,
 
 	DDBG(d, "GET_STATUS(ep%d)\n", ep_num);
 
-	if (ep_num >= AST_VHUB_NUM_GEN_EPs)
+	if (ep_num >= d->max_epns)
 		return std_req_stall;
 	if (ep_num != 0) {
 		ep = d->epns[ep_num - 1];
@@ -299,7 +299,7 @@ static void ast_vhub_dev_nuke(struct ast_vhub_dev *d)
 {
 	unsigned int i;
 
-	for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) {
+	for (i = 0; i < d->max_epns; i++) {
 		if (!d->epns[i])
 			continue;
 		ast_vhub_nuke(d->epns[i], -ESHUTDOWN);
@@ -416,10 +416,10 @@ static struct usb_ep *ast_vhub_udc_match_ep(struct usb_gadget *gadget,
 	 * that will allow the generic code to use our
 	 * assigned address.
 	 */
-	for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++)
+	for (i = 0; i < d->max_epns; i++)
 		if (d->epns[i] == NULL)
 			break;
-	if (i >= AST_VHUB_NUM_GEN_EPs)
+	if (i >= d->max_epns)
 		return NULL;
 	addr = i + 1;
 
@@ -526,6 +526,7 @@ void ast_vhub_del_dev(struct ast_vhub_dev *d)
 
 	usb_del_gadget_udc(&d->gadget);
 	device_unregister(d->port_dev);
+	kfree(d->epns);
 }
 
 static void ast_vhub_dev_release(struct device *dev)
@@ -546,14 +547,25 @@ int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx)
 
 	ast_vhub_init_ep0(vhub, &d->ep0, d);
 
+	/*
+	 * A USB device can have up to 30 endpoints besides control
+	 * endpoint 0.
+	 */
+	d->max_epns = min_t(u32, vhub->max_epns, 30);
+	d->epns = kcalloc(d->max_epns, sizeof(*d->epns), GFP_KERNEL);
+	if (!d->epns)
+		return -ENOMEM;
+
 	/*
 	 * The UDC core really needs us to have separate and uniquely
 	 * named "parent" devices for each port so we create a sub device
 	 * here for that purpose
 	 */
 	d->port_dev = kzalloc(sizeof(struct device), GFP_KERNEL);
-	if (!d->port_dev)
-		return -ENOMEM;
+	if (!d->port_dev) {
+		rc = -ENOMEM;
+		goto fail_alloc;
+	}
 	device_initialize(d->port_dev);
 	d->port_dev->release = ast_vhub_dev_release;
 	d->port_dev->parent = parent;
@@ -584,6 +596,8 @@ int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx)
 	device_del(d->port_dev);
  fail_add:
 	put_device(d->port_dev);
+ fail_alloc:
+	kfree(d->epns);
 
 	return rc;
 }
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index 7475c74aa5c5..0bd6b20435b8 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -800,10 +800,10 @@ struct ast_vhub_ep *ast_vhub_alloc_epn(struct ast_vhub_dev *d, u8 addr)
 
 	/* Find a free one (no device) */
 	spin_lock_irqsave(&vhub->lock, flags);
-	for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++)
+	for (i = 0; i < vhub->max_epns; i++)
 		if (vhub->epns[i].dev == NULL)
 			break;
-	if (i >= AST_VHUB_NUM_GEN_EPs) {
+	if (i >= vhub->max_epns) {
 		spin_unlock_irqrestore(&vhub->lock, flags);
 		return NULL;
 	}
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
index 19b3517e04c0..9c7e57fbd8ef 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
@@ -133,10 +133,13 @@ static const struct ast_vhub_full_cdesc {
 
 #define AST_VHUB_HUB_DESC_SIZE	(USB_DT_HUB_NONVAR_SIZE + 2)
 
-static const struct usb_hub_descriptor ast_vhub_hub_desc = {
+/*
+ * "bNbrPorts" field is updated in "ast_vhub_init_hub" function based on
+ * "max_ports" of the vhub.
+ */
+static struct usb_hub_descriptor ast_vhub_hub_desc = {
 	.bDescLength			= AST_VHUB_HUB_DESC_SIZE,
 	.bDescriptorType		= USB_DT_HUB,
-	.bNbrPorts			= AST_VHUB_NUM_PORTS,
 	.wHubCharacteristics		= cpu_to_le16(HUB_CHAR_NO_LPSM),
 	.bPwrOn2PwrGood			= 10,
 	.bHubContrCurrent		= 0,
@@ -504,7 +507,7 @@ static void ast_vhub_wake_work(struct work_struct *work)
 	 * we let the normal host wake path deal with it later.
 	 */
 	spin_lock_irqsave(&vhub->lock, flags);
-	for (i = 0; i < AST_VHUB_NUM_PORTS; i++) {
+	for (i = 0; i < vhub->max_ports; i++) {
 		struct ast_vhub_port *p = &vhub->ports[i];
 
 		if (!(p->status & USB_PORT_STAT_SUSPEND))
@@ -587,7 +590,7 @@ static enum std_req_rc ast_vhub_set_port_feature(struct ast_vhub_ep *ep,
 	struct ast_vhub *vhub = ep->vhub;
 	struct ast_vhub_port *p;
 
-	if (port == 0 || port > AST_VHUB_NUM_PORTS)
+	if (port == 0 || port > vhub->max_ports)
 		return std_req_stall;
 	port--;
 	p = &vhub->ports[port];
@@ -630,7 +633,7 @@ static enum std_req_rc ast_vhub_clr_port_feature(struct ast_vhub_ep *ep,
 	struct ast_vhub *vhub = ep->vhub;
 	struct ast_vhub_port *p;
 
-	if (port == 0 || port > AST_VHUB_NUM_PORTS)
+	if (port == 0 || port > vhub->max_ports)
 		return std_req_stall;
 	port--;
 	p = &vhub->ports[port];
@@ -676,7 +679,7 @@ static enum std_req_rc ast_vhub_get_port_stat(struct ast_vhub_ep *ep,
 	struct ast_vhub *vhub = ep->vhub;
 	u16 stat, chg;
 
-	if (port == 0 || port > AST_VHUB_NUM_PORTS)
+	if (port == 0 || port > vhub->max_ports)
 		return std_req_stall;
 	port--;
 
@@ -757,7 +760,7 @@ void ast_vhub_hub_suspend(struct ast_vhub *vhub)
 	 * Forward to unsuspended ports without changing
 	 * their connection status.
 	 */
-	for (i = 0; i < AST_VHUB_NUM_PORTS; i++) {
+	for (i = 0; i < vhub->max_ports; i++) {
 		struct ast_vhub_port *p = &vhub->ports[i];
 
 		if (!(p->status & USB_PORT_STAT_SUSPEND))
@@ -780,7 +783,7 @@ void ast_vhub_hub_resume(struct ast_vhub *vhub)
 	 * Forward to unsuspended ports without changing
 	 * their connection status.
 	 */
-	for (i = 0; i < AST_VHUB_NUM_PORTS; i++) {
+	for (i = 0; i < vhub->max_ports; i++) {
 		struct ast_vhub_port *p = &vhub->ports[i];
 
 		if (!(p->status & USB_PORT_STAT_SUSPEND))
@@ -814,7 +817,7 @@ void ast_vhub_hub_reset(struct ast_vhub *vhub)
 	 * Clear all port status, disable gadgets and "suspend"
 	 * them. They will be woken up by a port reset.
 	 */
-	for (i = 0; i < AST_VHUB_NUM_PORTS; i++) {
+	for (i = 0; i < vhub->max_ports; i++) {
 		struct ast_vhub_port *p = &vhub->ports[i];
 
 		/* Only keep the connected flag */
@@ -838,5 +841,10 @@ void ast_vhub_init_hub(struct ast_vhub *vhub)
 {
 	vhub->speed = USB_SPEED_UNKNOWN;
 	INIT_WORK(&vhub->wake_work, ast_vhub_wake_work);
+
+	/*
+	 * Fixup number of ports in hub descriptor.
+	 */
+	ast_vhub_hub_desc.bNbrPorts = vhub->max_ports;
 }
 
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
index 761919e220d3..e46980fe66f2 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
+++ b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
@@ -76,17 +76,9 @@
 #define VHUB_SW_RESET_DEVICE2			(1 << 2)
 #define VHUB_SW_RESET_DEVICE1			(1 << 1)
 #define VHUB_SW_RESET_ROOT_HUB			(1 << 0)
-#define VHUB_SW_RESET_ALL			(VHUB_SW_RESET_EP_POOL | \
-						 VHUB_SW_RESET_DMA_CONTROLLER | \
-						 VHUB_SW_RESET_DEVICE5 | \
-						 VHUB_SW_RESET_DEVICE4 | \
-						 VHUB_SW_RESET_DEVICE3 | \
-						 VHUB_SW_RESET_DEVICE2 | \
-						 VHUB_SW_RESET_DEVICE1 | \
-						 VHUB_SW_RESET_ROOT_HUB)
+
 /* EP ACK/NACK IRQ masks */
 #define VHUB_EP_IRQ(n)				(1 << (n))
-#define VHUB_EP_IRQ_ALL				0x7fff	/* 15 EPs */
 
 /* USB status reg */
 #define VHUB_USBSTS_HISPEED			(1 << 27)
@@ -210,8 +202,6 @@
  *                                      *
  ****************************************/
 
-#define AST_VHUB_NUM_GEN_EPs	15	/* Generic non-0 EPs */
-#define AST_VHUB_NUM_PORTS	5	/* vHub ports */
 #define AST_VHUB_EP0_MAX_PACKET	64	/* EP0's max packet size */
 #define AST_VHUB_EPn_MAX_PACKET	1024	/* Generic EPs max packet size */
 #define AST_VHUB_DESCS_COUNT	256	/* Use 256 descriptor mode (valid
@@ -342,7 +332,7 @@ struct ast_vhub_dev {
 	struct ast_vhub			*vhub;
 	void __iomem			*regs;
 
-	/* Device index (0...4) and name string */
+	/* Device index (zero-based) and name string */
 	unsigned int			index;
 	const char			*name;
 
@@ -358,7 +348,8 @@ struct ast_vhub_dev {
 
 	/* Endpoint structures */
 	struct ast_vhub_ep		ep0;
-	struct ast_vhub_ep		*epns[AST_VHUB_NUM_GEN_EPs];
+	struct ast_vhub_ep		**epns;
+	u32				max_epns;
 
 };
 #define to_ast_dev(__g) container_of(__g, struct ast_vhub_dev, gadget)
@@ -393,10 +384,12 @@ struct ast_vhub {
 	bool				ep1_stalled : 1;
 
 	/* Per-port info */
-	struct ast_vhub_port		ports[AST_VHUB_NUM_PORTS];
+	struct ast_vhub_port		*ports;
+	u32				max_ports;
 
 	/* Generic EP data structures */
-	struct ast_vhub_ep		epns[AST_VHUB_NUM_GEN_EPs];
+	struct ast_vhub_ep		*epns;
+	u32				max_epns;
 
 	/* Upstream bus is suspended ? */
 	bool				suspended : 1;
-- 
2.17.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 2/5] ARM: dts: aspeed-g4: add vhub port and endpoint properties
  2020-02-12 21:57 [PATCH v2 0/5] aspeed-g6: enable usb support rentao.bupt
  2020-02-12 21:57 ` [PATCH v2 1/5] usb: gadget: aspeed: read vhub properties from device tree rentao.bupt
@ 2020-02-12 21:57 ` rentao.bupt
  2020-02-12 21:57 ` [PATCH v2 3/5] ARM: dts: aspeed-g5: " rentao.bupt
                   ` (2 subsequent siblings)
  4 siblings, 0 replies; 8+ messages in thread
From: rentao.bupt @ 2020-02-12 21:57 UTC (permalink / raw)
  To: Felipe Balbi, Greg Kroah-Hartman, Joel Stanley, Andrew Jeffery,
	Benjamin Herrenschmidt, Chunfeng Yun, Colin Ian King,
	Stephen Boyd, Rob Herring, Mark Rutland, linux-usb,
	linux-arm-kernel, linux-aspeed, devicetree, linux-kernel,
	openbmc, taoren
  Cc: Tao Ren

From: Tao Ren <rentao.bupt@gmail.com>

Add "aspeed,vhub-downstream-ports" and "aspeed,vhub-generic-endpoints"
properties to describe supported number of vhub ports and endpoints.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
---
 Changes in v2:
   - None. The patch is newly added and it's given v2 to align with
     version of the patch series.

 arch/arm/boot/dts/aspeed-g4.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed-g4.dtsi b/arch/arm/boot/dts/aspeed-g4.dtsi
index 807a0fc20670..8e04303e8514 100644
--- a/arch/arm/boot/dts/aspeed-g4.dtsi
+++ b/arch/arm/boot/dts/aspeed-g4.dtsi
@@ -164,6 +164,8 @@
 			reg = <0x1e6a0000 0x300>;
 			interrupts = <5>;
 			clocks = <&syscon ASPEED_CLK_GATE_USBPORT1CLK>;
+			aspeed,vhub-downstream-ports = <5>;
+			aspeed,vhub-generic-endpoints = <15>;
 			pinctrl-names = "default";
 			pinctrl-0 = <&pinctrl_usb2d_default>;
 			status = "disabled";
-- 
2.17.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 3/5] ARM: dts: aspeed-g5: add vhub port and endpoint properties
  2020-02-12 21:57 [PATCH v2 0/5] aspeed-g6: enable usb support rentao.bupt
  2020-02-12 21:57 ` [PATCH v2 1/5] usb: gadget: aspeed: read vhub properties from device tree rentao.bupt
  2020-02-12 21:57 ` [PATCH v2 2/5] ARM: dts: aspeed-g4: add vhub port and endpoint properties rentao.bupt
@ 2020-02-12 21:57 ` " rentao.bupt
  2020-02-12 21:57 ` [PATCH v2 4/5] usb: gadget: aspeed: add ast2600 vhub support rentao.bupt
  2020-02-12 21:57 ` [PATCH v2 5/5] ARM: dts: aspeed-g6: add usb functions rentao.bupt
  4 siblings, 0 replies; 8+ messages in thread
From: rentao.bupt @ 2020-02-12 21:57 UTC (permalink / raw)
  To: Felipe Balbi, Greg Kroah-Hartman, Joel Stanley, Andrew Jeffery,
	Benjamin Herrenschmidt, Chunfeng Yun, Colin Ian King,
	Stephen Boyd, Rob Herring, Mark Rutland, linux-usb,
	linux-arm-kernel, linux-aspeed, devicetree, linux-kernel,
	openbmc, taoren
  Cc: Tao Ren

From: Tao Ren <rentao.bupt@gmail.com>

Add "aspeed,vhub-downstream-ports" and "aspeed,vhub-generic-endpoints"
properties to describe supported number of vhub ports and endpoints.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
---
 Changes in v2:
   - None. The patch is newly added and it's given v2 to align with
     version of the patch series.

 arch/arm/boot/dts/aspeed-g5.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
index ebec0fa8baa7..f12ec04d3cbc 100644
--- a/arch/arm/boot/dts/aspeed-g5.dtsi
+++ b/arch/arm/boot/dts/aspeed-g5.dtsi
@@ -195,6 +195,8 @@
 			reg = <0x1e6a0000 0x300>;
 			interrupts = <5>;
 			clocks = <&syscon ASPEED_CLK_GATE_USBPORT1CLK>;
+			aspeed,vhub-downstream-ports = <5>;
+			aspeed,vhub-generic-endpoints = <15>;
 			pinctrl-names = "default";
 			pinctrl-0 = <&pinctrl_usb2ad_default>;
 			status = "disabled";
-- 
2.17.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 4/5] usb: gadget: aspeed: add ast2600 vhub support
  2020-02-12 21:57 [PATCH v2 0/5] aspeed-g6: enable usb support rentao.bupt
                   ` (2 preceding siblings ...)
  2020-02-12 21:57 ` [PATCH v2 3/5] ARM: dts: aspeed-g5: " rentao.bupt
@ 2020-02-12 21:57 ` rentao.bupt
  2020-02-12 21:57 ` [PATCH v2 5/5] ARM: dts: aspeed-g6: add usb functions rentao.bupt
  4 siblings, 0 replies; 8+ messages in thread
From: rentao.bupt @ 2020-02-12 21:57 UTC (permalink / raw)
  To: Felipe Balbi, Greg Kroah-Hartman, Joel Stanley, Andrew Jeffery,
	Benjamin Herrenschmidt, Chunfeng Yun, Colin Ian King,
	Stephen Boyd, Rob Herring, Mark Rutland, linux-usb,
	linux-arm-kernel, linux-aspeed, devicetree, linux-kernel,
	openbmc, taoren
  Cc: Tao Ren

From: Tao Ren <rentao.bupt@gmail.com>

Add AST2600 support in aspeed-vhub driver. There are 3 major differences
between AST2500 and AST2600 vhub:
  - AST2600 supports 7 downstream ports while AST2500 supports 5.
  - AST2600 supports 21 generic endpoints while AST2500 supports 15.
  - EP0 data buffer's 8-byte DMA alignment restriction is removed from
    AST2600.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
---
 Changes in v2:
   - removed "ast_vhub_config" related logic.

 drivers/usb/gadget/udc/aspeed-vhub/Kconfig | 4 ++--
 drivers/usb/gadget/udc/aspeed-vhub/core.c  | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/Kconfig b/drivers/usb/gadget/udc/aspeed-vhub/Kconfig
index 83ba8a2eb6af..605500b19cf3 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/Kconfig
+++ b/drivers/usb/gadget/udc/aspeed-vhub/Kconfig
@@ -4,5 +4,5 @@ config USB_ASPEED_VHUB
 	depends on ARCH_ASPEED || COMPILE_TEST
 	depends on USB_LIBCOMPOSITE
 	help
-	  USB peripheral controller for the Aspeed AST2500 family
-	  SoCs supporting the "vHub" functionality and USB2.0
+	  USB peripheral controller for the Aspeed AST2400, AST2500 and
+	  AST2600 family SoCs supporting the "vHub" functionality and USB2.0
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c
index d6f737fac4e2..166d7182e2c0 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
@@ -423,6 +423,9 @@ static const struct of_device_id ast_vhub_dt_ids[] = {
 	{
 		.compatible = "aspeed,ast2500-usb-vhub",
 	},
+	{
+		.compatible = "aspeed,ast2600-usb-vhub",
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
-- 
2.17.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 5/5] ARM: dts: aspeed-g6: add usb functions
  2020-02-12 21:57 [PATCH v2 0/5] aspeed-g6: enable usb support rentao.bupt
                   ` (3 preceding siblings ...)
  2020-02-12 21:57 ` [PATCH v2 4/5] usb: gadget: aspeed: add ast2600 vhub support rentao.bupt
@ 2020-02-12 21:57 ` rentao.bupt
  4 siblings, 0 replies; 8+ messages in thread
From: rentao.bupt @ 2020-02-12 21:57 UTC (permalink / raw)
  To: Felipe Balbi, Greg Kroah-Hartman, Joel Stanley, Andrew Jeffery,
	Benjamin Herrenschmidt, Chunfeng Yun, Colin Ian King,
	Stephen Boyd, Rob Herring, Mark Rutland, linux-usb,
	linux-arm-kernel, linux-aspeed, devicetree, linux-kernel,
	openbmc, taoren
  Cc: Tao Ren

From: Tao Ren <rentao.bupt@gmail.com>

Add USB components and according pin groups in aspeed-g6 dtsi.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
---
 Changes in v2:
   - added port/endpoint properties for vhub dt node.

 arch/arm/boot/dts/aspeed-g6-pinctrl.dtsi | 25 +++++++++++++
 arch/arm/boot/dts/aspeed-g6.dtsi         | 45 ++++++++++++++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed-g6-pinctrl.dtsi b/arch/arm/boot/dts/aspeed-g6-pinctrl.dtsi
index 045ce66ca876..7028e21bdd98 100644
--- a/arch/arm/boot/dts/aspeed-g6-pinctrl.dtsi
+++ b/arch/arm/boot/dts/aspeed-g6-pinctrl.dtsi
@@ -1112,6 +1112,31 @@
 		groups = "UART9";
 	};
 
+	pinctrl_usb2ah_default: usb2ah_default {
+		function = "USB2AH";
+		groups = "USBA";
+	};
+
+	pinctrl_usb2ad_default: usb2ad_default {
+		function = "USB2AD";
+		groups = "USBA";
+	};
+
+	pinctrl_usb2bh_default: usb2bh_default {
+		function = "USB2BH";
+		groups = "USBB";
+	};
+
+	pinctrl_usb2bd_default: usb2bd_default {
+		function = "USB2BD";
+		groups = "USBB";
+	};
+
+	pinctrl_usb11bhid_default: usb11bhid_default {
+		function = "USB11BHID";
+		groups = "USBB";
+	};
+
 	pinctrl_vb_default: vb_default {
 		function = "VB";
 		groups = "VB";
diff --git a/arch/arm/boot/dts/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed-g6.dtsi
index 796976d275e1..0a29b3b57a9d 100644
--- a/arch/arm/boot/dts/aspeed-g6.dtsi
+++ b/arch/arm/boot/dts/aspeed-g6.dtsi
@@ -245,6 +245,51 @@
 			status = "disabled";
 		};
 
+		ehci0: usb@1e6a1000 {
+			compatible = "aspeed,ast2600-ehci", "generic-ehci";
+			reg = <0x1e6a1000 0x100>;
+			interrupts = <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon ASPEED_CLK_GATE_USBPORT1CLK>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_usb2ah_default>;
+			status = "disabled";
+		};
+
+		ehci1: usb@1e6a3000 {
+			compatible = "aspeed,ast2600-ehci", "generic-ehci";
+			reg = <0x1e6a3000 0x100>;
+			interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon ASPEED_CLK_GATE_USBPORT2CLK>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_usb2bh_default>;
+			status = "disabled";
+		};
+
+		uhci: usb@1e6b0000 {
+			compatible = "aspeed,ast2600-uhci", "generic-uhci";
+			reg = <0x1e6b0000 0x100>;
+			interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
+			#ports = <2>;
+			clocks = <&syscon ASPEED_CLK_GATE_USBUHCICLK>;
+			status = "disabled";
+			/*
+			 * No default pinmux, it will follow EHCI, use an
+			 * explicit pinmux override if EHCI is not enabled.
+			 */
+		};
+
+		vhub: usb-vhub@1e6a0000 {
+			compatible = "aspeed,ast2600-usb-vhub";
+			reg = <0x1e6a0000 0x350>;
+			interrupts = <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon ASPEED_CLK_GATE_USBPORT1CLK>;
+			aspeed,vhub-downstream-ports = <7>;
+			aspeed,vhub-generic-endpoints = <21>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_usb2ad_default>;
+			status = "disabled";
+		};
+
 		apb {
 			compatible = "simple-bus";
 			#address-cells = <1>;
-- 
2.17.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 1/5] usb: gadget: aspeed: read vhub properties from device tree
  2020-02-12 21:57 ` [PATCH v2 1/5] usb: gadget: aspeed: read vhub properties from device tree rentao.bupt
@ 2020-02-16 23:48   ` Andrew Jeffery
  2020-02-18  3:18     ` Tao Ren
  0 siblings, 1 reply; 8+ messages in thread
From: Andrew Jeffery @ 2020-02-16 23:48 UTC (permalink / raw)
  To: Tao Ren, Felipe Balbi, Greg Kroah-Hartman, Joel Stanley,
	Benjamin Herrenschmidt, Chunfeng Yun, Colin King, Stephen Boyd,
	Rob Herring, Mark Rutland, linux-usb, linux-arm-kernel,
	linux-aspeed, devicetree, linux-kernel, openbmc, Tao Ren



On Thu, 13 Feb 2020, at 08:27, rentao.bupt@gmail.com wrote:
> From: Tao Ren <rentao.bupt@gmail.com>
> 
> The patch introduces 2 DT properties ("aspeed,vhub-downstream-ports" and
> "aspeed,vhub-generic-endpoints") which replaces hardcoded port/endpoint
> number. It is to make it more convenient to add support for newer vhub
> revisions with different number of ports and endpoints.
> 
> Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
> Reviewed-by: Joel Stanley <joel@jms.id.au>
> ---
>  Changes in v2:
>    - removed ast_vhub_config structure and moved vhub port/endpoint
>      number into device tree.
> 
>  drivers/usb/gadget/udc/aspeed-vhub/core.c | 68 ++++++++++++++---------
>  drivers/usb/gadget/udc/aspeed-vhub/dev.c  | 30 +++++++---
>  drivers/usb/gadget/udc/aspeed-vhub/epn.c  |  4 +-
>  drivers/usb/gadget/udc/aspeed-vhub/hub.c  | 26 ++++++---
>  drivers/usb/gadget/udc/aspeed-vhub/vhub.h | 23 +++-----
>  5 files changed, 91 insertions(+), 60 deletions(-)
> 
> diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c 
> b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> index 90b134d5dca9..d6f737fac4e2 100644
> --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> @@ -99,7 +99,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
>  {
>  	struct ast_vhub *vhub = data;
>  	irqreturn_t iret = IRQ_NONE;
> -	u32 istat;
> +	u32 i, istat;
>  
>  	/* Stale interrupt while tearing down */
>  	if (!vhub->ep0_bufs)
> @@ -121,10 +121,10 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
>  
>  	/* Handle generic EPs first */
>  	if (istat & VHUB_IRQ_EP_POOL_ACK_STALL) {
> -		u32 i, ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR);
> +		u32 ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR);
>  		writel(ep_acks, vhub->regs + AST_VHUB_EP_ACK_ISR);
>  
> -		for (i = 0; ep_acks && i < AST_VHUB_NUM_GEN_EPs; i++) {
> +		for (i = 0; ep_acks && i < vhub->max_epns; i++) {
>  			u32 mask = VHUB_EP_IRQ(i);
>  			if (ep_acks & mask) {
>  				ast_vhub_epn_ack_irq(&vhub->epns[i]);
> @@ -134,21 +134,11 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
>  	}
>  
>  	/* Handle device interrupts */
> -	if (istat & (VHUB_IRQ_DEVICE1 |
> -		     VHUB_IRQ_DEVICE2 |
> -		     VHUB_IRQ_DEVICE3 |
> -		     VHUB_IRQ_DEVICE4 |
> -		     VHUB_IRQ_DEVICE5)) {
> -		if (istat & VHUB_IRQ_DEVICE1)
> -			ast_vhub_dev_irq(&vhub->ports[0].dev);
> -		if (istat & VHUB_IRQ_DEVICE2)
> -			ast_vhub_dev_irq(&vhub->ports[1].dev);
> -		if (istat & VHUB_IRQ_DEVICE3)
> -			ast_vhub_dev_irq(&vhub->ports[2].dev);
> -		if (istat & VHUB_IRQ_DEVICE4)
> -			ast_vhub_dev_irq(&vhub->ports[3].dev);
> -		if (istat & VHUB_IRQ_DEVICE5)
> -			ast_vhub_dev_irq(&vhub->ports[4].dev);
> +	for (i = 0; i < vhub->max_ports; i++) {
> +		u32 dev_mask = VHUB_IRQ_DEVICE1 << i;
> +
> +		if (istat & dev_mask)
> +			ast_vhub_dev_irq(&vhub->ports[i].dev);
>  	}
>  
>  	/* Handle top-level vHub EP0 interrupts */
> @@ -182,7 +172,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
>  
>  void ast_vhub_init_hw(struct ast_vhub *vhub)
>  {
> -	u32 ctrl;
> +	u32 ctrl, port_mask, epn_mask;
>  
>  	UDCDBG(vhub,"(Re)Starting HW ...\n");
>  
> @@ -222,15 +212,20 @@ void ast_vhub_init_hw(struct ast_vhub *vhub)
>  	}
>  
>  	/* Reset all devices */
> -	writel(VHUB_SW_RESET_ALL, vhub->regs + AST_VHUB_SW_RESET);
> +	port_mask = GENMASK(vhub->max_ports, 1);
> +	writel(VHUB_SW_RESET_ROOT_HUB |
> +	       VHUB_SW_RESET_DMA_CONTROLLER |
> +	       VHUB_SW_RESET_EP_POOL |
> +	       port_mask, vhub->regs + AST_VHUB_SW_RESET);
>  	udelay(1);
>  	writel(0, vhub->regs + AST_VHUB_SW_RESET);
>  
>  	/* Disable and cleanup EP ACK/NACK interrupts */
> +	epn_mask = GENMASK(vhub->max_epns - 1, 0);
>  	writel(0, vhub->regs + AST_VHUB_EP_ACK_IER);
>  	writel(0, vhub->regs + AST_VHUB_EP_NACK_IER);
> -	writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_ACK_ISR);
> -	writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_NACK_ISR);
> +	writel(epn_mask, vhub->regs + AST_VHUB_EP_ACK_ISR);
> +	writel(epn_mask, vhub->regs + AST_VHUB_EP_NACK_ISR);
>  
>  	/* Default settings for EP0, enable HW hub EP1 */
>  	writel(0, vhub->regs + AST_VHUB_EP0_CTRL);
> @@ -273,7 +268,7 @@ static int ast_vhub_remove(struct platform_device *pdev)
>  		return 0;
>  
>  	/* Remove devices */
> -	for (i = 0; i < AST_VHUB_NUM_PORTS; i++)
> +	for (i = 0; i < vhub->max_ports; i++)
>  		ast_vhub_del_dev(&vhub->ports[i].dev);
>  
>  	spin_lock_irqsave(&vhub->lock, flags);
> @@ -295,7 +290,7 @@ static int ast_vhub_remove(struct platform_device *pdev)
>  	if (vhub->ep0_bufs)
>  		dma_free_coherent(&pdev->dev,
>  				  AST_VHUB_EP0_MAX_PACKET *
> -				  (AST_VHUB_NUM_PORTS + 1),
> +				  (vhub->max_ports + 1),
>  				  vhub->ep0_bufs,
>  				  vhub->ep0_bufs_dma);
>  	vhub->ep0_bufs = NULL;
> @@ -309,11 +304,32 @@ static int ast_vhub_probe(struct platform_device *pdev)
>  	struct ast_vhub *vhub;
>  	struct resource *res;
>  	int i, rc = 0;
> +	const struct device_node *np = pdev->dev.of_node;
>  
>  	vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL);
>  	if (!vhub)
>  		return -ENOMEM;
>  
> +	rc = of_property_read_u32(np, "aspeed,vhub-downstream-ports",
> +				  &vhub->max_ports);
> +	if (rc < 0)
> +		return -ENODEV;

This breaks the driver for old devicetrees, or at the very least,
devicetrees without your subsequent two patches in the series.

I feel we shouldn't drop the built-in values for the 2400 and 2500, that
way we can fall back to them if the devicetree properties aren't present.

For the 2600 we can have a clean break and require the properties be
present (i.e. not hardcode the values in the driver for fallback) as there
aren't yet any devicetrees describing the device.

Andrew

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 1/5] usb: gadget: aspeed: read vhub properties from device tree
  2020-02-16 23:48   ` Andrew Jeffery
@ 2020-02-18  3:18     ` Tao Ren
  0 siblings, 0 replies; 8+ messages in thread
From: Tao Ren @ 2020-02-18  3:18 UTC (permalink / raw)
  To: Andrew Jeffery
  Cc: Felipe Balbi, Greg Kroah-Hartman, Joel Stanley,
	Benjamin Herrenschmidt, Chunfeng Yun, Colin King, Stephen Boyd,
	Rob Herring, Mark Rutland, linux-usb, linux-arm-kernel,
	linux-aspeed, devicetree, linux-kernel, openbmc, Tao Ren

Hi Andrew,

On Mon, Feb 17, 2020 at 10:18:11AM +1030, Andrew Jeffery wrote:
> 
> 
> On Thu, 13 Feb 2020, at 08:27, rentao.bupt@gmail.com wrote:
> > From: Tao Ren <rentao.bupt@gmail.com>
> > 
> > The patch introduces 2 DT properties ("aspeed,vhub-downstream-ports" and
> > "aspeed,vhub-generic-endpoints") which replaces hardcoded port/endpoint
> > number. It is to make it more convenient to add support for newer vhub
> > revisions with different number of ports and endpoints.
> > 
> > Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
> > Reviewed-by: Joel Stanley <joel@jms.id.au>
> > ---
> >  Changes in v2:
> >    - removed ast_vhub_config structure and moved vhub port/endpoint
> >      number into device tree.
> > 
> >  drivers/usb/gadget/udc/aspeed-vhub/core.c | 68 ++++++++++++++---------
> >  drivers/usb/gadget/udc/aspeed-vhub/dev.c  | 30 +++++++---
> >  drivers/usb/gadget/udc/aspeed-vhub/epn.c  |  4 +-
> >  drivers/usb/gadget/udc/aspeed-vhub/hub.c  | 26 ++++++---
> >  drivers/usb/gadget/udc/aspeed-vhub/vhub.h | 23 +++-----
> >  5 files changed, 91 insertions(+), 60 deletions(-)
> > 
> > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c 
> > b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > index 90b134d5dca9..d6f737fac4e2 100644
> > --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > @@ -99,7 +99,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
> >  {
> >  	struct ast_vhub *vhub = data;
> >  	irqreturn_t iret = IRQ_NONE;
> > -	u32 istat;
> > +	u32 i, istat;
> >  
> >  	/* Stale interrupt while tearing down */
> >  	if (!vhub->ep0_bufs)
> > @@ -121,10 +121,10 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
> >  
> >  	/* Handle generic EPs first */
> >  	if (istat & VHUB_IRQ_EP_POOL_ACK_STALL) {
> > -		u32 i, ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR);
> > +		u32 ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR);
> >  		writel(ep_acks, vhub->regs + AST_VHUB_EP_ACK_ISR);
> >  
> > -		for (i = 0; ep_acks && i < AST_VHUB_NUM_GEN_EPs; i++) {
> > +		for (i = 0; ep_acks && i < vhub->max_epns; i++) {
> >  			u32 mask = VHUB_EP_IRQ(i);
> >  			if (ep_acks & mask) {
> >  				ast_vhub_epn_ack_irq(&vhub->epns[i]);
> > @@ -134,21 +134,11 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
> >  	}
> >  
> >  	/* Handle device interrupts */
> > -	if (istat & (VHUB_IRQ_DEVICE1 |
> > -		     VHUB_IRQ_DEVICE2 |
> > -		     VHUB_IRQ_DEVICE3 |
> > -		     VHUB_IRQ_DEVICE4 |
> > -		     VHUB_IRQ_DEVICE5)) {
> > -		if (istat & VHUB_IRQ_DEVICE1)
> > -			ast_vhub_dev_irq(&vhub->ports[0].dev);
> > -		if (istat & VHUB_IRQ_DEVICE2)
> > -			ast_vhub_dev_irq(&vhub->ports[1].dev);
> > -		if (istat & VHUB_IRQ_DEVICE3)
> > -			ast_vhub_dev_irq(&vhub->ports[2].dev);
> > -		if (istat & VHUB_IRQ_DEVICE4)
> > -			ast_vhub_dev_irq(&vhub->ports[3].dev);
> > -		if (istat & VHUB_IRQ_DEVICE5)
> > -			ast_vhub_dev_irq(&vhub->ports[4].dev);
> > +	for (i = 0; i < vhub->max_ports; i++) {
> > +		u32 dev_mask = VHUB_IRQ_DEVICE1 << i;
> > +
> > +		if (istat & dev_mask)
> > +			ast_vhub_dev_irq(&vhub->ports[i].dev);
> >  	}
> >  
> >  	/* Handle top-level vHub EP0 interrupts */
> > @@ -182,7 +172,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data)
> >  
> >  void ast_vhub_init_hw(struct ast_vhub *vhub)
> >  {
> > -	u32 ctrl;
> > +	u32 ctrl, port_mask, epn_mask;
> >  
> >  	UDCDBG(vhub,"(Re)Starting HW ...\n");
> >  
> > @@ -222,15 +212,20 @@ void ast_vhub_init_hw(struct ast_vhub *vhub)
> >  	}
> >  
> >  	/* Reset all devices */
> > -	writel(VHUB_SW_RESET_ALL, vhub->regs + AST_VHUB_SW_RESET);
> > +	port_mask = GENMASK(vhub->max_ports, 1);
> > +	writel(VHUB_SW_RESET_ROOT_HUB |
> > +	       VHUB_SW_RESET_DMA_CONTROLLER |
> > +	       VHUB_SW_RESET_EP_POOL |
> > +	       port_mask, vhub->regs + AST_VHUB_SW_RESET);
> >  	udelay(1);
> >  	writel(0, vhub->regs + AST_VHUB_SW_RESET);
> >  
> >  	/* Disable and cleanup EP ACK/NACK interrupts */
> > +	epn_mask = GENMASK(vhub->max_epns - 1, 0);
> >  	writel(0, vhub->regs + AST_VHUB_EP_ACK_IER);
> >  	writel(0, vhub->regs + AST_VHUB_EP_NACK_IER);
> > -	writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_ACK_ISR);
> > -	writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_NACK_ISR);
> > +	writel(epn_mask, vhub->regs + AST_VHUB_EP_ACK_ISR);
> > +	writel(epn_mask, vhub->regs + AST_VHUB_EP_NACK_ISR);
> >  
> >  	/* Default settings for EP0, enable HW hub EP1 */
> >  	writel(0, vhub->regs + AST_VHUB_EP0_CTRL);
> > @@ -273,7 +268,7 @@ static int ast_vhub_remove(struct platform_device *pdev)
> >  		return 0;
> >  
> >  	/* Remove devices */
> > -	for (i = 0; i < AST_VHUB_NUM_PORTS; i++)
> > +	for (i = 0; i < vhub->max_ports; i++)
> >  		ast_vhub_del_dev(&vhub->ports[i].dev);
> >  
> >  	spin_lock_irqsave(&vhub->lock, flags);
> > @@ -295,7 +290,7 @@ static int ast_vhub_remove(struct platform_device *pdev)
> >  	if (vhub->ep0_bufs)
> >  		dma_free_coherent(&pdev->dev,
> >  				  AST_VHUB_EP0_MAX_PACKET *
> > -				  (AST_VHUB_NUM_PORTS + 1),
> > +				  (vhub->max_ports + 1),
> >  				  vhub->ep0_bufs,
> >  				  vhub->ep0_bufs_dma);
> >  	vhub->ep0_bufs = NULL;
> > @@ -309,11 +304,32 @@ static int ast_vhub_probe(struct platform_device *pdev)
> >  	struct ast_vhub *vhub;
> >  	struct resource *res;
> >  	int i, rc = 0;
> > +	const struct device_node *np = pdev->dev.of_node;
> >  
> >  	vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL);
> >  	if (!vhub)
> >  		return -ENOMEM;
> >  
> > +	rc = of_property_read_u32(np, "aspeed,vhub-downstream-ports",
> > +				  &vhub->max_ports);
> > +	if (rc < 0)
> > +		return -ENODEV;
> 
> This breaks the driver for old devicetrees, or at the very least,
> devicetrees without your subsequent two patches in the series.
> 
> I feel we shouldn't drop the built-in values for the 2400 and 2500, that
> way we can fall back to them if the devicetree properties aren't present.
> 
> For the 2600 we can have a clean break and require the properties be
> present (i.e. not hardcode the values in the driver for fallback) as there
> aren't yet any devicetrees describing the device.
> 
> Andrew

I understand it. I was also hesitating whether we should make the DT
properties mandatory.. I've sent out patch v3 which falls back to
"default" number of ports and endpoints in case the DT properties are
not present.


Cheers,

Tao

^ permalink raw reply	[flat|nested] 8+ messages in thread

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Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-02-12 21:57 [PATCH v2 0/5] aspeed-g6: enable usb support rentao.bupt
2020-02-12 21:57 ` [PATCH v2 1/5] usb: gadget: aspeed: read vhub properties from device tree rentao.bupt
2020-02-16 23:48   ` Andrew Jeffery
2020-02-18  3:18     ` Tao Ren
2020-02-12 21:57 ` [PATCH v2 2/5] ARM: dts: aspeed-g4: add vhub port and endpoint properties rentao.bupt
2020-02-12 21:57 ` [PATCH v2 3/5] ARM: dts: aspeed-g5: " rentao.bupt
2020-02-12 21:57 ` [PATCH v2 4/5] usb: gadget: aspeed: add ast2600 vhub support rentao.bupt
2020-02-12 21:57 ` [PATCH v2 5/5] ARM: dts: aspeed-g6: add usb functions rentao.bupt

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