[PATCH linux dev-5.4 v3 1/3] usb: gadget: aspeed: read vhub config from of_device_id
rentao.bupt at gmail.com
rentao.bupt at gmail.com
Tue Jan 28 14:06:01 AEDT 2020
From: Tao Ren <rentao.bupt at gmail.com>
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. By doing this, it will be very straightforward to
enable support of AST2600 vhub which has different number of downstream
ports and endpoints.
Signed-off-by: Tao Ren <rentao.bupt at gmail.com>
---
Changes in v3:
- adding comments that hub descriptor's "bNbrPorts" fields will be
updated in "ast_vhub_init_hub" function.
- fixing compile warnings:
* core.c: "struct ast_vhub_config" -> "const struct ast_vhub_config"
* dev.c: "min" -> "min_t"
- fixing comments in vhub.h:
* "Device index (0...4)" -> "Device index (zero-based)"
Changes in v2:
- this is the first version. It's given v2 to align with the version
of patch series.
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
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