2020-01-31 22:23:13

by Tao Ren

Subject: [PATCH 0/3] aspeed-g6: enable usb support

From: Tao Ren <[email protected]>

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

Patch #1 moves hardcoded vhub attributes (number of downstream ports and
endpoints) to "struct ast_hub_config" which is then attached to "struct
of_device_id". By doing this, it will be easier to enable ast2600 vhub
which supports more ports and endpoints.

Patch #2 enables AST2600 support in aspeed-vhub gadget driver.

Patch #3 adds USB devices and according pin groups in aspeed-g6 dtsi.

Tao Ren (3):
usb: gadget: aspeed: read vhub config from of_device_id
usb: gadget: aspeed: add ast2600 vhub support
ARM: dts: aspeed-g6: add usb functions

arch/arm/boot/dts/aspeed-g6-pinctrl.dtsi | 25 +++++
arch/arm/boot/dts/aspeed-g6.dtsi | 43 ++++++++
drivers/usb/gadget/udc/aspeed-vhub/Kconfig | 4 +-
drivers/usb/gadget/udc/aspeed-vhub/core.c | 109 ++++++++++++++-------
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 ++---
8 files changed, 191 insertions(+), 73 deletions(-)

--
2.17.1

2020-01-31 22:23:17

by Tao Ren

Subject: [PATCH 1/3] usb: gadget: aspeed: read vhub config from of_device_id

From: Tao Ren <[email protected]>

The patch moves hardcoded vhub attributes (maximum downstream ports and
generic endpoints) to "ast_vhub_config" structure which is attached to
struct of_device_id. The major purpose is to add AST2600 vhub support
because AST2600 vhub provides more downstream ports and endpoints.

Signed-off-by: Tao Ren <[email protected]>
---
drivers/usb/gadget/udc/aspeed-vhub/core.c | 100 ++++++++++++++--------
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, 112 insertions(+), 71 deletions(-)

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c
index 90b134d5dca9..94081cc04113 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
@@ -32,6 +32,29 @@

#include "vhub.h"

+struct ast_vhub_config {
+ u32 max_ports; /* max number of downstream ports */
+ u32 max_epns; /* max number of generic endpoints */
+};
+
+static const struct ast_vhub_config ast2400_config = {
+ .max_ports = 5,
+ .max_epns = 15,
+};
+
+static const struct of_device_id ast_vhub_dt_ids[] = {
+ {
+ .compatible = "aspeed,ast2400-usb-vhub",
+ .data = &ast2400_config,
+ },
+ {
+ .compatible = "aspeed,ast2500-usb-vhub",
+ .data = &ast2400_config,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
+
void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req,
int status)
{
@@ -99,7 +122,7 @@ 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 +144,10 @@ 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 +157,11 @@ 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 +195,7 @@ 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 +235,20 @@ 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 +291,7 @@ 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 +313,7 @@ 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 +327,30 @@ static int ast_vhub_probe(struct platform_device *pdev)
struct ast_vhub *vhub;
struct resource *res;
int i, rc = 0;
+ const struct of_device_id *ofdid;
+ const struct ast_vhub_config *config;

vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL);
if (!vhub)
return -ENOMEM;

+ ofdid = of_match_node(ast_vhub_dt_ids, pdev->dev.of_node);
+ if (!ofdid)
+ return -EINVAL;
+ config = ofdid->data;
+
+ vhub->max_ports = config->max_ports;
+ vhub->ports = devm_kcalloc(&pdev->dev, vhub->max_ports,
+ sizeof(*vhub->ports), GFP_KERNEL);
+ if (!vhub->ports)
+ return -ENOMEM;
+
+ vhub->max_epns = config->max_epns;
+ 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 +403,7 @@ 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 +417,7 @@ 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;
@@ -400,17 +437,6 @@ static int ast_vhub_probe(struct platform_device *pdev)
return rc;
}

-static const struct of_device_id ast_vhub_dt_ids[] = {
- {
- .compatible = "aspeed,ast2400-usb-vhub",
- },
- {
- .compatible = "aspeed,ast2500-usb-vhub",
- },
- { }
-};
-MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
-
static struct platform_driver ast_vhub_driver = {
.probe = ast_vhub_probe,
.remove = ast_vhub_remove,
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

2020-01-31 22:23:21

by Tao Ren

Subject: [PATCH 2/3] usb: gadget: aspeed: add ast2600 vhub support

From: Tao Ren <[email protected]>

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 <[email protected]>
Reviewed-by: Andrew Jeffery <[email protected]>
---
drivers/usb/gadget/udc/aspeed-vhub/Kconfig | 4 ++--
drivers/usb/gadget/udc/aspeed-vhub/core.c | 9 +++++++++
2 files changed, 11 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 94081cc04113..c827bf420278 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
@@ -42,6 +42,11 @@ static const struct ast_vhub_config ast2400_config = {
.max_epns = 15,
};

+static const struct ast_vhub_config ast2600_config = {
+ .max_ports = 7,
+ .max_epns = 21,
+};
+
static const struct of_device_id ast_vhub_dt_ids[] = {
{
.compatible = "aspeed,ast2400-usb-vhub",
@@ -51,6 +56,10 @@ static const struct of_device_id ast_vhub_dt_ids[] = {
.compatible = "aspeed,ast2500-usb-vhub",
.data = &ast2400_config,
},
+ {
+ .compatible = "aspeed,ast2600-usb-vhub",
+ .data = &ast2600_config,
+ },
{ }
};
MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
--
2.17.1

2020-01-31 22:23:40

by Tao Ren

Subject: [PATCH 3/3] ARM: dts: aspeed-g6: add usb functions

From: Tao Ren <[email protected]>

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

Signed-off-by: Tao Ren <[email protected]>
Reviewed-by: Andrew Jeffery <[email protected]>
---
arch/arm/boot/dts/aspeed-g6-pinctrl.dtsi | 25 ++++++++++++++
arch/arm/boot/dts/aspeed-g6.dtsi | 43 ++++++++++++++++++++++++
2 files changed, 68 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 5f6142d99eeb..02c21c15c19f 100644
--- a/arch/arm/boot/dts/aspeed-g6.dtsi
+++ b/arch/arm/boot/dts/aspeed-g6.dtsi
@@ -265,6 +265,49 @@
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>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usb2ad_default>;
+ status = "disabled";
+ };
+
apb {
compatible = "simple-bus";
#address-cells = <1>;
--
2.17.1

2020-02-10 02:47:47

by Joel Stanley

Subject: Re: [PATCH 1/3] usb: gadget: aspeed: read vhub config from of_device_id

On Fri, 31 Jan 2020 at 22:22, <[email protected]> wrote:
>
> From: Tao Ren <[email protected]>
>
> The patch moves hardcoded vhub attributes (maximum downstream ports and
> generic endpoints) to "ast_vhub_config" structure which is attached to
> struct of_device_id. The major purpose is to add AST2600 vhub support
> because AST2600 vhub provides more downstream ports and endpoints.
>
> Signed-off-by: Tao Ren <[email protected]>

This looks generally okay. We should wait for Ben's ack before applying.

Reviewed-by: Joel Stanley <[email protected]>

> ---
> drivers/usb/gadget/udc/aspeed-vhub/core.c | 100 ++++++++++++++--------
> 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, 112 insertions(+), 71 deletions(-)
>
> diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> index 90b134d5dca9..94081cc04113 100644
> --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> @@ -32,6 +32,29 @@
>
> #include "vhub.h"
>
> +struct ast_vhub_config {
> + u32 max_ports; /* max number of downstream ports */
> + u32 max_epns; /* max number of generic endpoints */
> +};
> +
> +static const struct ast_vhub_config ast2400_config = {
> + .max_ports = 5,
> + .max_epns = 15,
> +};
> +
> +static const struct of_device_id ast_vhub_dt_ids[] = {
> + {
> + .compatible = "aspeed,ast2400-usb-vhub",
> + .data = &ast2400_config,
> + },
> + {
> + .compatible = "aspeed,ast2500-usb-vhub",
> + .data = &ast2400_config,
> + },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
> +
> void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req,
> int status)
> {
> @@ -99,7 +122,7 @@ 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 +144,10 @@ 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 +157,11 @@ 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 +195,7 @@ 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 +235,20 @@ 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 +291,7 @@ 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 +313,7 @@ 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 +327,30 @@ static int ast_vhub_probe(struct platform_device *pdev)
> struct ast_vhub *vhub;
> struct resource *res;
> int i, rc = 0;
> + const struct of_device_id *ofdid;
> + const struct ast_vhub_config *config;
>
> vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL);
> if (!vhub)
> return -ENOMEM;
>
> + ofdid = of_match_node(ast_vhub_dt_ids, pdev->dev.of_node);
> + if (!ofdid)
> + return -EINVAL;
> + config = ofdid->data;
> +
> + vhub->max_ports = config->max_ports;
> + vhub->ports = devm_kcalloc(&pdev->dev, vhub->max_ports,
> + sizeof(*vhub->ports), GFP_KERNEL);
> + if (!vhub->ports)
> + return -ENOMEM;
> +
> + vhub->max_epns = config->max_epns;
> + 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 +403,7 @@ 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 +417,7 @@ 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;
> @@ -400,17 +437,6 @@ static int ast_vhub_probe(struct platform_device *pdev)
> return rc;
> }
>
> -static const struct of_device_id ast_vhub_dt_ids[] = {
> - {
> - .compatible = "aspeed,ast2400-usb-vhub",
> - },
> - {
> - .compatible = "aspeed,ast2500-usb-vhub",
> - },
> - { }
> -};
> -MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
> -
> static struct platform_driver ast_vhub_driver = {
> .probe = ast_vhub_probe,
> .remove = ast_vhub_remove,
> 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
>

2020-02-10 02:49:36

by Joel Stanley

Subject: Re: [PATCH 3/3] ARM: dts: aspeed-g6: add usb functions

On Fri, 31 Jan 2020 at 22:22, <[email protected]> wrote:
>
> From: Tao Ren <[email protected]>
>
> Add USB components and according pin groups in aspeed-g6 dtsi.
>
> Signed-off-by: Tao Ren <[email protected]>
> Reviewed-by: Andrew Jeffery <[email protected]>

I've applied this to the aspeed tree for 5.7.

Cheers,

Joel

2020-02-10 02:50:03

by Joel Stanley

Subject: Re: [PATCH 2/3] usb: gadget: aspeed: add ast2600 vhub support

On Fri, 31 Jan 2020 at 22:22, <[email protected]> wrote:
>
> From: Tao Ren <[email protected]>
>
> 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 <[email protected]>
> Reviewed-by: Andrew Jeffery <[email protected]>

Reviewed-by: Joel Stanley <[email protected]>

> ---
> drivers/usb/gadget/udc/aspeed-vhub/Kconfig | 4 ++--
> drivers/usb/gadget/udc/aspeed-vhub/core.c | 9 +++++++++
> 2 files changed, 11 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 94081cc04113..c827bf420278 100644
> --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> @@ -42,6 +42,11 @@ static const struct ast_vhub_config ast2400_config = {
> .max_epns = 15,
> };
>
> +static const struct ast_vhub_config ast2600_config = {
> + .max_ports = 7,
> + .max_epns = 21,
> +};
> +
> static const struct of_device_id ast_vhub_dt_ids[] = {
> {
> .compatible = "aspeed,ast2400-usb-vhub",
> @@ -51,6 +56,10 @@ static const struct of_device_id ast_vhub_dt_ids[] = {
> .compatible = "aspeed,ast2500-usb-vhub",
> .data = &ast2400_config,
> },
> + {
> + .compatible = "aspeed,ast2600-usb-vhub",
> + .data = &ast2600_config,
> + },
> { }
> };
> MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
> --
> 2.17.1
>

2020-02-10 07:28:50

by Benjamin Herrenschmidt

Subject: Re: [PATCH 1/3] usb: gadget: aspeed: read vhub config from of_device_id

On Mon, 2020-02-10 at 02:47 +0000, Joel Stanley wrote:
> On Fri, 31 Jan 2020 at 22:22, <[email protected]> wrote:
> >
> > From: Tao Ren <[email protected]>
> >
> > The patch moves hardcoded vhub attributes (maximum downstream ports
> > and
> > generic endpoints) to "ast_vhub_config" structure which is attached
> > to
> > struct of_device_id. The major purpose is to add AST2600 vhub
> > support
> > because AST2600 vhub provides more downstream ports and endpoints.
> >
> > Signed-off-by: Tao Ren <[email protected]>
>
> This looks generally okay. We should wait for Ben's ack before
> applying.

Shouldn't we instead have DT fields indicating those values ?

Also we should add a DT representation for the various ID/strings of
the hub itself so manufacturers can customize them.

> Reviewed-by: Joel Stanley <[email protected]>
>
> > ---
> > drivers/usb/gadget/udc/aspeed-vhub/core.c | 100 ++++++++++++++--
> > ------
> > 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, 112 insertions(+), 71 deletions(-)
> >
> > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > index 90b134d5dca9..94081cc04113 100644
> > --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > @@ -32,6 +32,29 @@
> >
> > #include "vhub.h"
> >
> > +struct ast_vhub_config {
> > + u32 max_ports; /* max number of downstream ports */
> > + u32 max_epns; /* max number of generic endpoints */
> > +};
> > +
> > +static const struct ast_vhub_config ast2400_config = {
> > + .max_ports = 5,
> > + .max_epns = 15,
> > +};
> > +
> > +static const struct of_device_id ast_vhub_dt_ids[] = {
> > + {
> > + .compatible = "aspeed,ast2400-usb-vhub",
> > + .data = &ast2400_config,
> > + },
> > + {
> > + .compatible = "aspeed,ast2500-usb-vhub",
> > + .data = &ast2400_config,
> > + },
> > + { }
> > +};
> > +MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
> > +
> > void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req
> > *req,
> > int status)
> > {
> > @@ -99,7 +122,7 @@ 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 +144,10 @@ 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 +157,11 @@ 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 +195,7 @@ 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 +235,20 @@ 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 +291,7 @@ 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 +313,7 @@ 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 +327,30 @@ static int ast_vhub_probe(struct
> > platform_device *pdev)
> > struct ast_vhub *vhub;
> > struct resource *res;
> > int i, rc = 0;
> > + const struct of_device_id *ofdid;
> > + const struct ast_vhub_config *config;
> >
> > vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL);
> > if (!vhub)
> > return -ENOMEM;
> >
> > + ofdid = of_match_node(ast_vhub_dt_ids, pdev->dev.of_node);
> > + if (!ofdid)
> > + return -EINVAL;
> > + config = ofdid->data;
> > +
> > + vhub->max_ports = config->max_ports;
> > + vhub->ports = devm_kcalloc(&pdev->dev, vhub->max_ports,
> > + sizeof(*vhub->ports),
> > GFP_KERNEL);
> > + if (!vhub->ports)
> > + return -ENOMEM;
> > +
> > + vhub->max_epns = config->max_epns;
> > + 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 +403,7 @@ 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 +417,7 @@ 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;
> > @@ -400,17 +437,6 @@ static int ast_vhub_probe(struct
> > platform_device *pdev)
> > return rc;
> > }
> >
> > -static const struct of_device_id ast_vhub_dt_ids[] = {
> > - {
> > - .compatible = "aspeed,ast2400-usb-vhub",
> > - },
> > - {
> > - .compatible = "aspeed,ast2500-usb-vhub",
> > - },
> > - { }
> > -};
> > -MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
> > -
> > static struct platform_driver ast_vhub_driver = {
> > .probe = ast_vhub_probe,
> > .remove = ast_vhub_remove,
> > 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_DEVI
> > CE5 | \
> > - VHUB_SW_RESET_DEVI
> > CE4 | \
> > - VHUB_SW_RESET_DEVI
> > CE3 | \
> > - VHUB_SW_RESET_DEVI
> > CE2 | \
> > - VHUB_SW_RESET_DEVI
> > CE1 | \
> > - 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
> >
>
> _______________________________________________
> linux-arm-kernel mailing list
> [email protected]
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

2020-02-10 07:31:31

by Benjamin Herrenschmidt

Subject: Re: [PATCH 2/3] usb: gadget: aspeed: add ast2600 vhub support

On Mon, 2020-02-10 at 02:48 +0000, Joel Stanley wrote:
> On Fri, 31 Jan 2020 at 22:22, <[email protected]> wrote:
> >
> > From: Tao Ren <[email protected]>
> >
> > 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 <[email protected]>
> > Reviewed-by: Andrew Jeffery <[email protected]>

Travelling at the moment so my review might be a bit delayed. Also for
some reason I missed your original submission, sorry about that, please
poke me next time if I don't reply within a couple of days !

One thing to look into as well is the 2600 has revived the "device
controller" which looks like a cut down version of a vhub device, so we
should break a bit more the linkage between vhub and the underlying
devices so the latter can be instanciated standalone...

(Foor for thought, I'm not asking you to do that right now)

Cheers,
Ben.

> Reviewed-by: Joel Stanley <[email protected]>
>
> > ---
> > drivers/usb/gadget/udc/aspeed-vhub/Kconfig | 4 ++--
> > drivers/usb/gadget/udc/aspeed-vhub/core.c | 9 +++++++++
> > 2 files changed, 11 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 94081cc04113..c827bf420278 100644
> > --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > @@ -42,6 +42,11 @@ static const struct ast_vhub_config ast2400_config = {
> > .max_epns = 15,
> > };
> >
> > +static const struct ast_vhub_config ast2600_config = {
> > + .max_ports = 7,
> > + .max_epns = 21,
> > +};
> > +
> > static const struct of_device_id ast_vhub_dt_ids[] = {
> > {
> > .compatible = "aspeed,ast2400-usb-vhub",
> > @@ -51,6 +56,10 @@ static const struct of_device_id ast_vhub_dt_ids[] = {
> > .compatible = "aspeed,ast2500-usb-vhub",
> > .data = &ast2400_config,
> > },
> > + {
> > + .compatible = "aspeed,ast2600-usb-vhub",
> > + .data = &ast2600_config,
> > + },
> > { }
> > };
> > MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
> > --
> > 2.17.1
> >

2020-02-10 19:08:12

by Tao Ren

Subject: Re: [PATCH 1/3] usb: gadget: aspeed: read vhub config from of_device_id

On Mon, Feb 10, 2020 at 08:27:20AM +0100, Benjamin Herrenschmidt wrote:
> On Mon, 2020-02-10 at 02:47 +0000, Joel Stanley wrote:
> > On Fri, 31 Jan 2020 at 22:22, <[email protected]> wrote:
> > >
> > > From: Tao Ren <[email protected]>
> > >
> > > The patch moves hardcoded vhub attributes (maximum downstream ports
> > > and
> > > generic endpoints) to "ast_vhub_config" structure which is attached
> > > to
> > > struct of_device_id. The major purpose is to add AST2600 vhub
> > > support
> > > because AST2600 vhub provides more downstream ports and endpoints.
> > >
> > > Signed-off-by: Tao Ren <[email protected]>
> >
> > This looks generally okay. We should wait for Ben's ack before
> > applying.
>
> Shouldn't we instead have DT fields indicating those values ?

May I ask why we prefer adding dt fields (such as "aspeed,vhub-max-ports"
and "aspeed,vhub-max-endpoints") instead of assigning these values based
on aspeed family? For example, is it to allow users to set a smaller
number of ports/endpoints?

>
> Also we should add a DT representation for the various ID/strings of
> the hub itself so manufacturers can customize them.

Sure. I will add DT nodes for vendor/product/device IDs/strings. As it's
not directly related to ast2600-support, shall I handle it in a separate
patch? Or I can include the patch in this patch series?


Cheers,

Tao
>
> > Reviewed-by: Joel Stanley <[email protected]>
> >
> > > ---
> > > drivers/usb/gadget/udc/aspeed-vhub/core.c | 100 ++++++++++++++--
> > > ------
> > > 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, 112 insertions(+), 71 deletions(-)
> > >
> > > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > > b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > > index 90b134d5dca9..94081cc04113 100644
> > > --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > > +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > > @@ -32,6 +32,29 @@
> > >
> > > #include "vhub.h"
> > >
> > > +struct ast_vhub_config {
> > > + u32 max_ports; /* max number of downstream ports */
> > > + u32 max_epns; /* max number of generic endpoints */
> > > +};
> > > +
> > > +static const struct ast_vhub_config ast2400_config = {
> > > + .max_ports = 5,
> > > + .max_epns = 15,
> > > +};
> > > +
> > > +static const struct of_device_id ast_vhub_dt_ids[] = {
> > > + {
> > > + .compatible = "aspeed,ast2400-usb-vhub",
> > > + .data = &ast2400_config,
> > > + },
> > > + {
> > > + .compatible = "aspeed,ast2500-usb-vhub",
> > > + .data = &ast2400_config,
> > > + },
> > > + { }
> > > +};
> > > +MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
> > > +
> > > void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req
> > > *req,
> > > int status)
> > > {
> > > @@ -99,7 +122,7 @@ 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 +144,10 @@ 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 +157,11 @@ 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 +195,7 @@ 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 +235,20 @@ 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 +291,7 @@ 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 +313,7 @@ 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 +327,30 @@ static int ast_vhub_probe(struct
> > > platform_device *pdev)
> > > struct ast_vhub *vhub;
> > > struct resource *res;
> > > int i, rc = 0;
> > > + const struct of_device_id *ofdid;
> > > + const struct ast_vhub_config *config;
> > >
> > > vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL);
> > > if (!vhub)
> > > return -ENOMEM;
> > >
> > > + ofdid = of_match_node(ast_vhub_dt_ids, pdev->dev.of_node);
> > > + if (!ofdid)
> > > + return -EINVAL;
> > > + config = ofdid->data;
> > > +
> > > + vhub->max_ports = config->max_ports;
> > > + vhub->ports = devm_kcalloc(&pdev->dev, vhub->max_ports,
> > > + sizeof(*vhub->ports),
> > > GFP_KERNEL);
> > > + if (!vhub->ports)
> > > + return -ENOMEM;
> > > +
> > > + vhub->max_epns = config->max_epns;
> > > + 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 +403,7 @@ 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 +417,7 @@ 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;
> > > @@ -400,17 +437,6 @@ static int ast_vhub_probe(struct
> > > platform_device *pdev)
> > > return rc;
> > > }
> > >
> > > -static const struct of_device_id ast_vhub_dt_ids[] = {
> > > - {
> > > - .compatible = "aspeed,ast2400-usb-vhub",
> > > - },
> > > - {
> > > - .compatible = "aspeed,ast2500-usb-vhub",
> > > - },
> > > - { }
> > > -};
> > > -MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
> > > -
> > > static struct platform_driver ast_vhub_driver = {
> > > .probe = ast_vhub_probe,
> > > .remove = ast_vhub_remove,
> > > 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_DEVI
> > > CE5 | \
> > > - VHUB_SW_RESET_DEVI
> > > CE4 | \
> > > - VHUB_SW_RESET_DEVI
> > > CE3 | \
> > > - VHUB_SW_RESET_DEVI
> > > CE2 | \
> > > - VHUB_SW_RESET_DEVI
> > > CE1 | \
> > > - 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
> > >
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > [email protected]
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>

2020-02-10 19:17:00

by Tao Ren

Subject: Re: [PATCH 1/3] usb: gadget: aspeed: read vhub config from of_device_id

On Mon, Feb 10, 2020 at 02:47:02AM +0000, Joel Stanley wrote:
> On Fri, 31 Jan 2020 at 22:22, <[email protected]> wrote:
> >
> > From: Tao Ren <[email protected]>
> >
> > The patch moves hardcoded vhub attributes (maximum downstream ports and
> > generic endpoints) to "ast_vhub_config" structure which is attached to
> > struct of_device_id. The major purpose is to add AST2600 vhub support
> > because AST2600 vhub provides more downstream ports and endpoints.
> >
> > Signed-off-by: Tao Ren <[email protected]>
>
> This looks generally okay. We should wait for Ben's ack before applying.
>
> Reviewed-by: Joel Stanley <[email protected]>

Thanks Joel for reviewing the patches.

Cheers,

Tao

2020-02-10 19:33:24

by Tao Ren

Subject: Re: [PATCH 2/3] usb: gadget: aspeed: add ast2600 vhub support

On Mon, Feb 10, 2020 at 08:29:22AM +0100, Benjamin Herrenschmidt wrote:
> On Mon, 2020-02-10 at 02:48 +0000, Joel Stanley wrote:
> > On Fri, 31 Jan 2020 at 22:22, <[email protected]> wrote:
> > >
> > > From: Tao Ren <[email protected]>
> > >
> > > 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 <[email protected]>
> > > Reviewed-by: Andrew Jeffery <[email protected]>
>
> Travelling at the moment so my review might be a bit delayed. Also for
> some reason I missed your original submission, sorry about that, please
> poke me next time if I don't reply within a couple of days !

No worries Ben and thanks for the review. I thought people was too busy
during merge window :)

>
> One thing to look into as well is the 2600 has revived the "device
> controller" which looks like a cut down version of a vhub device, so we
> should break a bit more the linkage between vhub and the underlying
> devices so the latter can be instanciated standalone...
>
> (Foor for thought, I'm not asking you to do that right now)

Thanks for sharing your thought. I was actually curious why "device
controller" was back. Anyways I feel it might be easier to break the
linkage when we decide to add driver for the "device controller".


Cheers,

Tao
>
> Cheers,
> Ben.
>
> > Reviewed-by: Joel Stanley <[email protected]>
> >
> > > ---
> > > drivers/usb/gadget/udc/aspeed-vhub/Kconfig | 4 ++--
> > > drivers/usb/gadget/udc/aspeed-vhub/core.c | 9 +++++++++
> > > 2 files changed, 11 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 94081cc04113..c827bf420278 100644
> > > --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > > +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c
> > > @@ -42,6 +42,11 @@ static const struct ast_vhub_config ast2400_config = {
> > > .max_epns = 15,
> > > };
> > >
> > > +static const struct ast_vhub_config ast2600_config = {
> > > + .max_ports = 7,
> > > + .max_epns = 21,
> > > +};
> > > +
> > > static const struct of_device_id ast_vhub_dt_ids[] = {
> > > {
> > > .compatible = "aspeed,ast2400-usb-vhub",
> > > @@ -51,6 +56,10 @@ static const struct of_device_id ast_vhub_dt_ids[] = {
> > > .compatible = "aspeed,ast2500-usb-vhub",
> > > .data = &ast2400_config,
> > > },
> > > + {
> > > + .compatible = "aspeed,ast2600-usb-vhub",
> > > + .data = &ast2600_config,
> > > + },
> > > { }
> > > };
> > > MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids);
> > > --
> > > 2.17.1
> > >
>

2020-02-11 09:08:58

by Benjamin Herrenschmidt

Subject: Re: [PATCH 1/3] usb: gadget: aspeed: read vhub config from of_device_id

On Mon, 2020-02-10 at 11:07 -0800, Tao Ren wrote:
> > > This looks generally okay. We should wait for Ben's ack before
> > > applying.
> >
> > Shouldn't we instead have DT fields indicating those values ?
>
> May I ask why we prefer adding dt fields (such as "aspeed,vhub-max-ports"
> and "aspeed,vhub-max-endpoints") instead of assigning these values based
> on aspeed family? For example, is it to allow users to set a smaller
> number of ports/endpoints?

It's not a strong drive but it makes it more convenient to add support
to newer revisions if the only differences are those numbers.
>
> > Also we should add a DT representation for the various ID/strings of
> > the hub itself so manufacturers can customize them.
>
> Sure. I will add DT nodes for vendor/product/device IDs/strings. As it's
> not directly related to ast2600-support, shall I handle it in a separate
> patch? Or I can include the patch in this patch series?

Separate. Thanks !

Cheers,
Ben.

2020-02-12 02:38:32

by Tao Ren

Subject: Re: [PATCH 1/3] usb: gadget: aspeed: read vhub config from of_device_id

On Tue, Feb 11, 2020 at 09:50:42AM +0100, Benjamin Herrenschmidt wrote:
> On Mon, 2020-02-10 at 11:07 -0800, Tao Ren wrote:
> > > > This looks generally okay. We should wait for Ben's ack before
> > > > applying.
> > >
> > > Shouldn't we instead have DT fields indicating those values ?
> >
> > May I ask why we prefer adding dt fields (such as "aspeed,vhub-max-ports"
> > and "aspeed,vhub-max-endpoints") instead of assigning these values based
> > on aspeed family? For example, is it to allow users to set a smaller
> > number of ports/endpoints?
>
> It's not a strong drive but it makes it more convenient to add support
> to newer revisions if the only differences are those numbers.

Got it. Thanks for the clarify. Will send out v2 patches after more
testing.

> >
> > > Also we should add a DT representation for the various ID/strings of
> > > the hub itself so manufacturers can customize them.
> >
> > Sure. I will add DT nodes for vendor/product/device IDs/strings. As it's
> > not directly related to ast2600-support, shall I handle it in a separate
> > patch? Or I can include the patch in this patch series?
>
> Separate. Thanks !

Will take care of the change once this patch series is accepted.


Cheers,

Tao
>
> Cheers,
> Ben.
>
>