| Message ID | 20200226230346.672-3-rentao.bupt@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | aspeed-g6: enable usb support | expand |
On Wed, 2020-02-26 at 15:03 -0800, rentao.bupt@gmail.com wrote: > From: Tao Ren <rentao.bupt@gmail.com> > > The patch introduces 2 DT properties ("aspeed,vhub-downstream-ports" and > "aspeed,vhub-generic-endpoints") which replaces hardcoded port/endpoint > number. It is to make it more convenient to add support for newer vhub > revisions with different number of ports and endpoints. > > Signed-off-by: Tao Ren <rentao.bupt@gmail.com> > Reviewed-by: Joel Stanley <joel@jms.id.au> With one minor nit that can be addressed in a subsequent patch (see below) Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> > --- > Changes in v4: > - use NUM_PORTS/NUM_GEN_EPs defined in vhub.h instead of introducing > new constants (in v3). > Changes in v3: > - fall back to "default" number of ports and endpoints to avoid > breaking existing ast2400/ast2500 platforms when according device > tree properties are not defined. > Changes in v2: > - removed ast_vhub_config structure and moved vhub port/endpoint > number into device tree. > > drivers/usb/gadget/udc/aspeed-vhub/core.c | 68 ++++++++++++++--------- > drivers/usb/gadget/udc/aspeed-vhub/dev.c | 30 +++++++--- > drivers/usb/gadget/udc/aspeed-vhub/epn.c | 4 +- > drivers/usb/gadget/udc/aspeed-vhub/hub.c | 15 ++--- > drivers/usb/gadget/udc/aspeed-vhub/vhub.h | 28 +++++----- > 5 files changed, 88 insertions(+), 57 deletions(-) > > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c > index 90b134d5dca9..f8ab8e012f34 100644 > --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c > +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c > @@ -99,7 +99,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data) > { > struct ast_vhub *vhub = data; > irqreturn_t iret = IRQ_NONE; > - u32 istat; > + u32 i, istat; > > /* Stale interrupt while tearing down */ > if (!vhub->ep0_bufs) > @@ -121,10 +121,10 @@ static irqreturn_t ast_vhub_irq(int irq, void *data) > > /* Handle generic EPs first */ > if (istat & VHUB_IRQ_EP_POOL_ACK_STALL) { > - u32 i, ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR); > + u32 ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR); > writel(ep_acks, vhub->regs + AST_VHUB_EP_ACK_ISR); > > - for (i = 0; ep_acks && i < AST_VHUB_NUM_GEN_EPs; i++) { > + for (i = 0; ep_acks && i < vhub->max_epns; i++) { > u32 mask = VHUB_EP_IRQ(i); > if (ep_acks & mask) { > ast_vhub_epn_ack_irq(&vhub->epns[i]); > @@ -134,21 +134,11 @@ static irqreturn_t ast_vhub_irq(int irq, void *data) > } > > /* Handle device interrupts */ > - if (istat & (VHUB_IRQ_DEVICE1 | > - VHUB_IRQ_DEVICE2 | > - VHUB_IRQ_DEVICE3 | > - VHUB_IRQ_DEVICE4 | > - VHUB_IRQ_DEVICE5)) { > - if (istat & VHUB_IRQ_DEVICE1) > - ast_vhub_dev_irq(&vhub->ports[0].dev); > - if (istat & VHUB_IRQ_DEVICE2) > - ast_vhub_dev_irq(&vhub->ports[1].dev);On Wed, > 2020-02-26 at 15:03 -0800, rentao.bupt@gmail.com wrote:> From: Tao > Ren <rentao.bupt@gmail.com>> > > The patch introduces 2 DT properties ("aspeed,vhub-downstream- > ports" and> "aspeed,vhub-generic-endpoints") which replaces hardcoded > port/endpoint> number. It is to make it more convenient to add > support for newer vhub> revisions with different number of ports and > endpoints.> > > Signed-off-by: Tao Ren <rentao.bupt@gmail.com>> Reviewed-by: Joel > Stanley <joel@jms.id.au>> ---> Changes in v4:> - use > NUM_PORTS/NUM_GEN_EPs defined in vhub.h instead of introducing> > new constants (in v3).> Changes in v3:> - fall back to > "default" number of ports and endpoints to avoid> breaking > existing ast2400/ast2500 platforms when according device> tree > properties are not defined.> Changes in v2:> - removed > ast_vhub_config structure and moved vhub port/endpoint> number > into device tree.> > > drivers/usb/gadget/udc/aspeed-vhub/core.c | 68 ++++++++++++++----- > ----> drivers/usb/gadget/udc/aspeed-vhub/dev.c | 30 +++++++---> > drivers/usb/gadget/udc/aspeed-vhub/epn.c | 4 +-> > drivers/usb/gadget/udc/aspeed-vhub/hub.c | 15 ++---> > drivers/usb/gadget/udc/aspeed-vhub/vhub.h | 28 +++++-----> 5 files > changed, 88 insertions(+), 57 deletions(-)> > > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c > b/drivers/usb/gadget/udc/aspeed-vhub/core.c> index > 90b134d5dca9..f8ab8e012f34 100644> --- > a/drivers/usb/gadget/udc/aspeed-vhub/core.c> +++ > b/drivers/usb/gadget/udc/aspeed-vhub/core.c> @@ -99,7 +99,7 @@ static > irqreturn_t ast_vhub_irq(int irq, void *data)> {> struct ast_vhub > *vhub = data;> irqreturn_t iret = IRQ_NONE;> - u32 istat;> + > u32 i, istat;> > /* Stale interrupt while tearing down > */> if (!vhub->ep0_bufs)> @@ -121,10 +121,10 @@ static irqreturn_t > ast_vhub_irq(int irq, void *data)> > /* Handle generic EPs > first */> if (istat & VHUB_IRQ_EP_POOL_ACK_STALL) {> - > u32 i, ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR);> + > u32 ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR);> > writel(ep_acks, vhub->regs + AST_VHUB_EP_ACK_ISR);> > - > for (i = 0; ep_acks && i < AST_VHUB_NUM_GEN_EPs; i++) {> + > for (i = 0; ep_acks && i < vhub->max_epns; i++) {> > u32 mask = VHUB_EP_IRQ(i);> if (ep_acks & mask) {> > ast_vhub_epn_ack_irq(&vhub->epns[i]);> > @@ -134,21 +134,11 @@ static irqreturn_t ast_vhub_irq(int irq, void > *data)> }> > /* Handle device interrupts */> - if > (istat & (VHUB_IRQ_DEVICE1 |> - VHUB_IRQ_DEVICE2 > |> - VHUB_IRQ_DEVICE3 |> - VHUB_IRQ > _DEVICE4 |> - VHUB_IRQ_DEVICE5)) {> - if > (istat & VHUB_IRQ_DEVICE1)> - ast_vhub_dev_irq(&vhub- > >ports[0].dev);> - if (istat & VHUB_IRQ_DEVICE2)> - > ast_vhub_dev_irq(&vhub->ports[1].dev);> - if (istat & > VHUB_IRQ_DEVICE3)> - ast_vhub_dev_irq(&vhub- > >ports[2].dev);> - if (istat & VHUB_IRQ_DEVICE4)> - > ast_vhub_dev_irq(&vhub->ports[3].dev);> - if (istat & > VHUB_IRQ_DEVICE5)> - ast_vhub_dev_irq(&vhub- > >ports[4].dev);> + for (i = 0; i < vhub->max_ports; i++) {> + > u32 dev_mask = VHUB_IRQ_DEVICE1 << i;> +> + if > (istat & dev_mask)> + ast_vhub_dev_irq(&vhub- > >ports[i].dev);> }> > /* Handle top-level vHub EP0 > interrupts */> @@ -182,7 +172,7 @@ static irqreturn_t > ast_vhub_irq(int irq, void *data)> > void ast_vhub_init_hw(struct > ast_vhub *vhub)> {> - u32 ctrl;> + u32 ctrl, port_mask, > epn_mask;> > UDCDBG(vhub,"(Re)Starting HW ...\n");> > @@ > -222,15 +212,20 @@ void ast_vhub_init_hw(struct ast_vhub *vhub)> > }> > /* Reset all devices */> - writel(VHUB_SW_RESET_ > ALL, vhub->regs + AST_VHUB_SW_RESET);> + port_mask = > GENMASK(vhub->max_ports, 1);> + writel(VHUB_SW_RESET_ROOT_HUB > |> + VHUB_SW_RESET_DMA_CONTROLLER |> + VHUB_SW_RESET_ > EP_POOL |> + port_mask, vhub->regs + AST_VHUB_SW_RESET);> > udelay(1);> writel(0, vhub->regs + AST_VHUB_SW_RESET);> > /* > Disable and cleanup EP ACK/NACK interrupts */> + epn_mask = > GENMASK(vhub->max_epns - 1, 0);> writel(0, vhub->regs + > AST_VHUB_EP_ACK_IER);> writel(0, vhub->regs + > AST_VHUB_EP_NACK_IER);> - writel(VHUB_EP_IRQ_ALL, vhub->regs + > AST_VHUB_EP_ACK_ISR);> - writel(VHUB_EP_IRQ_ALL, vhub->regs + > AST_VHUB_EP_NACK_ISR);> + writel(epn_mask, vhub->regs + > AST_VHUB_EP_ACK_ISR);> + writel(epn_mask, vhub->regs + > AST_VHUB_EP_NACK_ISR);> > /* Default settings for EP0, enable HW > hub EP1 */> writel(0, vhub->regs + AST_VHUB_EP0_CTRL);> @@ -273,7 > +268,7 @@ static int ast_vhub_remove(struct platform_device *pdev)> > return 0;> > /* Remove devices */> - for (i = 0; i < > AST_VHUB_NUM_PORTS; i++)> + for (i = 0; i < vhub->max_ports; i++)> > ast_vhub_del_dev(&vhub->ports[i].dev);> > spin_ > lock_irqsave(&vhub->lock, flags);> @@ -295,7 +290,7 @@ static int > ast_vhub_remove(struct platform_device *pdev)> if (vhub- > >ep0_bufs)> dma_free_coherent(&pdev->dev,> > AST_VHUB_EP0_MAX_PACKET *> - (AS > T_VHUB_NUM_PORTS + 1),> + (vhub- > >max_ports + 1),> vhub->ep0_bufs,> > vhub->ep0_bufs_dma);> vhub->ep0_bufs = > NULL;> @@ -309,11 +304,32 @@ static int ast_vhub_probe(struct > platform_device *pdev)> struct ast_vhub *vhub;> struct > resource *res;> int i, rc = 0;> + const struct device_node *np > = pdev->dev.of_node;> > vhub = devm_kzalloc(&pdev->dev, > sizeof(*vhub), GFP_KERNEL);> if (!vhub)> retur > n -ENOMEM;> > + rc = of_property_read_u32(np, "aspeed,vhub- > downstream-ports",> + &vhub->max_ports);> + > if (rc < 0)> + vhub->max_ports = > AST_VHUB_NUM_PORTS;> +> + vhub->ports = devm_kcalloc(&pdev->dev, > vhub->max_ports,> + sizeof(*vhub- > >ports), GFP_KERNEL);> + if (!vhub->ports)> + retur > n -ENOMEM;> +> + rc = of_property_read_u32(np, "aspeed,vhub- > generic-endpoints",> + &vhub- > >max_epns);> + if (rc < 0)> + vhub->max_epns = > AST_VHUB_NUM_GEN_EPs;> +> + vhub->epns = devm_kcalloc(&pdev->dev, > vhub->max_epns,> + sizeof(*vhub->epns), > GFP_KERNEL);> + if (!vhub->epns)> + return > -ENOMEM;> +> spin_lock_init(&vhub->lock);> vhub->pdev = > pdev;> > @@ -366,7 +382,7 @@ static int ast_vhub_probe(struct > platform_device *pdev)> */> vhub->ep0_bufs = > dma_alloc_coherent(&pdev->dev,> > AST_VHUB_EP0_MAX_PACKET *> - > (AST_VHUB_NUM_PORTS + 1),> + > (vhub->max_ports + 1),> &vh > ub->ep0_bufs_dma, GFP_KERNEL);> if (!vhub->ep0_bufs) {> > dev_err(&pdev->dev, "Failed to allocate EP0 DMA buffers\n");> @@ > -380,7 +396,7 @@ static int ast_vhub_probe(struct platform_device > *pdev)> ast_vhub_init_ep0(vhub, &vhub->ep0, NULL);> > /* > Init devices */> - for (i = 0; i < AST_VHUB_NUM_PORTS && rc == 0; > i++)> + for (i = 0; i < vhub->max_ports && rc == 0; i++)> > rc = ast_vhub_init_dev(vhub, i);> if (rc)> > goto err;> diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c > b/drivers/usb/gadget/udc/aspeed-vhub/dev.c> index > 4008e7a51188..d268306a7bfe 100644> --- > a/drivers/usb/gadget/udc/aspeed-vhub/dev.c> +++ > b/drivers/usb/gadget/udc/aspeed-vhub/dev.c> @@ -77,7 +77,7 @@ static > void ast_vhub_dev_enable(struct ast_vhub_dev *d)> writel(d- > >ep0.buf_dma, d->regs + AST_VHUB_DEV_EP0_DATA);> > /* Clear stall > on all EPs */> - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) {> + > for (i = 0; i < d->max_epns; i++) {> struct > ast_vhub_ep *ep = d->epns[i];> > if (ep && (ep- > >epn.stalled || ep->epn.wedged)) {> @@ -137,7 +137,7 @@ static int > ast_vhub_ep_feature(struct ast_vhub_dev *d,> is_set ? > "SET" : "CLEAR", ep_num, wValue);> if (ep_num == 0)> > return std_req_complete;> - if (ep_num >= AST_VHUB_NUM_GEN_EPs || > !d->epns[ep_num - 1])> + if (ep_num >= d->max_epns || !d- > >epns[ep_num - 1])> return std_req_stall;> if (wValue != > USB_ENDPOINT_HALT)> return std_req_driver;> @@ -181,7 > +181,7 @@ static int ast_vhub_ep_status(struct ast_vhub_dev *d,> > > DDBG(d, "GET_STATUS(ep%d)\n", ep_num);> > - if (ep_num >= > AST_VHUB_NUM_GEN_EPs)> + if (ep_num >= d->max_epns)> > return std_req_stall;> if (ep_num != 0) {> ep = > d->epns[ep_num - 1];> @@ -299,7 +299,7 @@ static void > ast_vhub_dev_nuke(struct ast_vhub_dev *d)> {> unsigned int > i;> > - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) {> + for > (i = 0; i < d->max_epns; i++) {> if (!d->epns[i])> > continue;> ast_vhub_nuke(d->epns[i], > -ESHUTDOWN);> @@ -416,10 +416,10 @@ static struct usb_ep > *ast_vhub_udc_match_ep(struct usb_gadget *gadget,> * that will > allow the generic code to use our> * assigned address.> */> > - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++)> + for (i = 0; i > < d->max_epns; i++)> if (d->epns[i] == NULL)> > break;> - if (i >= AST_VHUB_NUM_GEN_EPs)> + if (i > >= d->max_epns)> return NULL;> addr = i + 1;> > @@ > -526,6 +526,7 @@ void ast_vhub_del_dev(struct ast_vhub_dev *d)> > > usb_del_gadget_udc(&d->gadget);> device_unregister(d- > >port_dev);> + kfree(d->epns);> }> > static void > ast_vhub_dev_release(struct device *dev)> @@ -546,14 +547,25 @@ int > ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx)> > > ast_vhub_init_ep0(vhub, &d->ep0, d);> > + /*> + * A USB > device can have up to 30 endpoints besides control> + * endpoint 0.> > + */> + d->max_epns = min_t(u32, vhub->max_epns, 30);> + > d->epns = kcalloc(d->max_epns, sizeof(*d->epns), GFP_KERNEL);> + > if (!d->epns)> + return -ENOMEM;> +> /*> * > The UDC core really needs us to have separate and uniquely> * > named "parent" devices for each port so we create a sub device> > * here for that purpose> */> d->port_dev = > kzalloc(sizeof(struct device), GFP_KERNEL);> - if (!d- > >port_dev)> - return -ENOMEM;> + if (!d->port_dev) {> > + rc = -ENOMEM;> + goto fail_alloc;> + }> > device_initialize(d->port_dev);> d->port_dev->release = > ast_vhub_dev_release;> d->port_dev->parent = parent;> @@ > -584,6 +596,8 @@ int ast_vhub_init_dev(struct ast_vhub *vhub, > unsigned int idx)> device_del(d->port_dev);> fail_add:> put_d > evice(d->port_dev);> + fail_alloc:> + kfree(d->epns);> > retur > n 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_irq > save(&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 > 9c3027306b15..6e565c3dbb5b 100644> --- > a/drivers/usb/gadget/udc/aspeed-vhub/hub.c> +++ > b/drivers/usb/gadget/udc/aspeed-vhub/hub.c> @@ -502,7 +502,7 @@ > 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))> @@ -585,7 +585,7 @@ 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];> @@ -628,7 +628,7 @@ 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];> @@ -674,7 +674,7 @@ 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--;> > > @@ -755,7 +755,7 @@ 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))> @@ -778,7 +778,7 @@ 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))> @@ -812,7 +812,7 @@ 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 */> @@ -845,6 +845,7 @@ static void > ast_vhub_init_desc(struct ast_vhub *vhub)> /* Initialize vhub Hub > Descriptor. */> memcpy(&vhub->vhub_hub_desc, > &ast_vhub_hub_desc,> sizeof(vhub->vhub_hub_desc));> > + vhub->vhub_hub_desc.bNbrPorts = vhub->max_ports;> > /* > Initialize vhub String Descriptors. */> memcpy(&vhub- > >vhub_str_desc, &ast_vhub_strings,> diff --git > a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h > b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h> index > 191f9fae7420..fac79ef6d669 100644> --- > a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h> +++ > b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h> @@ -79,17 +79,9 @@> > #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_S > W_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)> @@ -213,6 +205,11 @@> > * *> > ****************************************/> > +/*> + * > AST_VHUB_NUM_GEN_EPs and AST_VHUB_NUM_PORTS are kept to avoid > breaking> + * existing AST2400/AST2500 platforms. AST2600 and future > vhub revisions> + * should define number of downstream ports and > endpoints in device tree.> + */> #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 */> @@ -315,7 +312,7 @@ struct ast_vhub_ep {> > /* Registers */> void > __iomem *regs;> > - /* Index in > global pool (0..14) */> + /* Index in global pool > (zero-based) */> unsigned int g_idx > ;> > /* DMA Descriptors */> @@ -345,7 +342,7 > @@ 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;> > @@ -361,7 +358,8 @@ 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 **epn > s;> + u32 max_epns;> > };> #define > to_ast_dev(__g) container_of(__g, struct ast_vhub_dev, gadget)> @@ > -402,10 +400,12 @@ 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 */> - struc > t ast_vhub_ep epns[AST_VHUB_NUM_GEN_EPs];> + struct > ast_vhub_ep *epns;> + u32 max_e > pns;> > /* Upstream bus is suspended ? */> bool > suspended : 1; > - 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); > } The 2400 and 2500 have very slow cores and every cycle counts in that interrupt handler from my experience. I would sugggest you generate a "mask" of all the device interrupts for enabled ports in struct vhub and AND istat with that mask before going through the loop. Either that or use find_next_zero_bit... I wouldn't gate merging this patch on this, it can be a subsequent refinement. > /* Handle top-level vHub EP0 interrupts */ > @@ -182,7 +172,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data) > > void ast_vhub_init_hw(struct ast_vhub *vhub) > { > - u32 ctrl; > + u32 ctrl, port_mask, epn_mask; > > UDCDBG(vhub,"(Re)Starting HW ...\n"); > > @@ -222,15 +212,20 @@ void ast_vhub_init_hw(struct ast_vhub *vhub) > } > > /* Reset all devices */ > - writel(VHUB_SW_RESET_ALL, vhub->regs + AST_VHUB_SW_RESET); > + port_mask = GENMASK(vhub->max_ports, 1); > + writel(VHUB_SW_RESET_ROOT_HUB | > + VHUB_SW_RESET_DMA_CONTROLLER | > + VHUB_SW_RESET_EP_POOL | > + port_mask, vhub->regs + AST_VHUB_SW_RESET); > udelay(1); > writel(0, vhub->regs + AST_VHUB_SW_RESET); > > /* Disable and cleanup EP ACK/NACK interrupts */ > + epn_mask = GENMASK(vhub->max_epns - 1, 0); > writel(0, vhub->regs + AST_VHUB_EP_ACK_IER); > writel(0, vhub->regs + AST_VHUB_EP_NACK_IER); > - writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_ACK_ISR); > - writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_NACK_ISR); > + writel(epn_mask, vhub->regs + AST_VHUB_EP_ACK_ISR); > + writel(epn_mask, vhub->regs + AST_VHUB_EP_NACK_ISR); > > /* Default settings for EP0, enable HW hub EP1 */ > writel(0, vhub->regs + AST_VHUB_EP0_CTRL); > @@ -273,7 +268,7 @@ static int ast_vhub_remove(struct platform_device *pdev) > return 0; > > /* Remove devices */ > - for (i = 0; i < AST_VHUB_NUM_PORTS; i++) > + for (i = 0; i < vhub->max_ports; i++) > ast_vhub_del_dev(&vhub->ports[i].dev); > > spin_lock_irqsave(&vhub->lock, flags); > @@ -295,7 +290,7 @@ static int ast_vhub_remove(struct platform_device *pdev) > if (vhub->ep0_bufs) > dma_free_coherent(&pdev->dev, > AST_VHUB_EP0_MAX_PACKET * > - (AST_VHUB_NUM_PORTS + 1), > + (vhub->max_ports + 1), > vhub->ep0_bufs, > vhub->ep0_bufs_dma); > vhub->ep0_bufs = NULL; > @@ -309,11 +304,32 @@ static int ast_vhub_probe(struct platform_device *pdev) > struct ast_vhub *vhub; > struct resource *res; > int i, rc = 0; > + const struct device_node *np = pdev->dev.of_node; > > vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL); > if (!vhub) > return -ENOMEM; > > + rc = of_property_read_u32(np, "aspeed,vhub-downstream-ports", > + &vhub->max_ports); > + if (rc < 0) > + vhub->max_ports = AST_VHUB_NUM_PORTS; > + > + vhub->ports = devm_kcalloc(&pdev->dev, vhub->max_ports, > + sizeof(*vhub->ports), GFP_KERNEL); > + if (!vhub->ports) > + return -ENOMEM; > + > + rc = of_property_read_u32(np, "aspeed,vhub-generic-endpoints", > + &vhub->max_epns); > + if (rc < 0) > + vhub->max_epns = AST_VHUB_NUM_GEN_EPs; > + > + vhub->epns = devm_kcalloc(&pdev->dev, vhub->max_epns, > + sizeof(*vhub->epns), GFP_KERNEL); > + if (!vhub->epns) > + return -ENOMEM; > + > spin_lock_init(&vhub->lock); > vhub->pdev = pdev; > > @@ -366,7 +382,7 @@ static int ast_vhub_probe(struct platform_device *pdev) > */ > vhub->ep0_bufs = dma_alloc_coherent(&pdev->dev, > AST_VHUB_EP0_MAX_PACKET * > - (AST_VHUB_NUM_PORTS + 1), > + (vhub->max_ports + 1), > &vhub->ep0_bufs_dma, GFP_KERNEL); > if (!vhub->ep0_bufs) { > dev_err(&pdev->dev, "Failed to allocate EP0 DMA buffers\n"); > @@ -380,7 +396,7 @@ static int ast_vhub_probe(struct platform_device *pdev) > ast_vhub_init_ep0(vhub, &vhub->ep0, NULL); > > /* Init devices */ > - for (i = 0; i < AST_VHUB_NUM_PORTS && rc == 0; i++) > + for (i = 0; i < vhub->max_ports && rc == 0; i++) > rc = ast_vhub_init_dev(vhub, i); > if (rc) > goto err; > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c > index 4008e7a51188..d268306a7bfe 100644 > --- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c > +++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c > @@ -77,7 +77,7 @@ static void ast_vhub_dev_enable(struct ast_vhub_dev *d) > writel(d->ep0.buf_dma, d->regs + AST_VHUB_DEV_EP0_DATA); > > /* Clear stall on all EPs */ > - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) { > + for (i = 0; i < d->max_epns; i++) { > struct ast_vhub_ep *ep = d->epns[i]; > > if (ep && (ep->epn.stalled || ep->epn.wedged)) { > @@ -137,7 +137,7 @@ static int ast_vhub_ep_feature(struct ast_vhub_dev *d, > is_set ? "SET" : "CLEAR", ep_num, wValue); > if (ep_num == 0) > return std_req_complete; > - if (ep_num >= AST_VHUB_NUM_GEN_EPs || !d->epns[ep_num - 1]) > + if (ep_num >= d->max_epns || !d->epns[ep_num - 1]) > return std_req_stall; > if (wValue != USB_ENDPOINT_HALT) > return std_req_driver; > @@ -181,7 +181,7 @@ static int ast_vhub_ep_status(struct ast_vhub_dev *d, > > DDBG(d, "GET_STATUS(ep%d)\n", ep_num); > > - if (ep_num >= AST_VHUB_NUM_GEN_EPs) > + if (ep_num >= d->max_epns) > return std_req_stall; > if (ep_num != 0) { > ep = d->epns[ep_num - 1]; > @@ -299,7 +299,7 @@ static void ast_vhub_dev_nuke(struct ast_vhub_dev *d) > { > unsigned int i; > > - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) { > + for (i = 0; i < d->max_epns; i++) { > if (!d->epns[i]) > continue; > ast_vhub_nuke(d->epns[i], -ESHUTDOWN); > @@ -416,10 +416,10 @@ static struct usb_ep *ast_vhub_udc_match_ep(struct usb_gadget *gadget, > * that will allow the generic code to use our > * assigned address. > */ > - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) > + for (i = 0; i < d->max_epns; i++) > if (d->epns[i] == NULL) > break; > - if (i >= AST_VHUB_NUM_GEN_EPs) > + if (i >= d->max_epns) > return NULL; > addr = i + 1; > > @@ -526,6 +526,7 @@ void ast_vhub_del_dev(struct ast_vhub_dev *d) > > usb_del_gadget_udc(&d->gadget); > device_unregister(d->port_dev); > + kfree(d->epns); > } > > static void ast_vhub_dev_release(struct device *dev) > @@ -546,14 +547,25 @@ int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx) > > ast_vhub_init_ep0(vhub, &d->ep0, d); > > + /* > + * A USB device can have up to 30 endpoints besides control > + * endpoint 0. > + */ > + d->max_epns = min_t(u32, vhub->max_epns, 30); > + d->epns = kcalloc(d->max_epns, sizeof(*d->epns), GFP_KERNEL); > + if (!d->epns) > + return -ENOMEM; > + > /* > * The UDC core really needs us to have separate and uniquely > * named "parent" devices for each port so we create a sub device > * here for that purpose > */ > d->port_dev = kzalloc(sizeof(struct device), GFP_KERNEL); > - if (!d->port_dev) > - return -ENOMEM; > + if (!d->port_dev) { > + rc = -ENOMEM; > + goto fail_alloc; > + } > device_initialize(d->port_dev); > d->port_dev->release = ast_vhub_dev_release; > d->port_dev->parent = parent; > @@ -584,6 +596,8 @@ int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx) > device_del(d->port_dev); > fail_add: > put_device(d->port_dev); > + fail_alloc: > + kfree(d->epns); > > return rc; > } > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c > index 7475c74aa5c5..0bd6b20435b8 100644 > --- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c > +++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c > @@ -800,10 +800,10 @@ struct ast_vhub_ep *ast_vhub_alloc_epn(struct ast_vhub_dev *d, u8 addr) > > /* Find a free one (no device) */ > spin_lock_irqsave(&vhub->lock, flags); > - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) > + for (i = 0; i < vhub->max_epns; i++) > if (vhub->epns[i].dev == NULL) > break; > - if (i >= AST_VHUB_NUM_GEN_EPs) { > + if (i >= vhub->max_epns) { > spin_unlock_irqrestore(&vhub->lock, flags); > return NULL; > } > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c > index 9c3027306b15..6e565c3dbb5b 100644 > --- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c > +++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c > @@ -502,7 +502,7 @@ 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)) > @@ -585,7 +585,7 @@ 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]; > @@ -628,7 +628,7 @@ 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]; > @@ -674,7 +674,7 @@ 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--; > > @@ -755,7 +755,7 @@ 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)) > @@ -778,7 +778,7 @@ 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)) > @@ -812,7 +812,7 @@ 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 */ > @@ -845,6 +845,7 @@ static void ast_vhub_init_desc(struct ast_vhub *vhub) > /* Initialize vhub Hub Descriptor. */ > memcpy(&vhub->vhub_hub_desc, &ast_vhub_hub_desc, > sizeof(vhub->vhub_hub_desc)); > + vhub->vhub_hub_desc.bNbrPorts = vhub->max_ports; > > /* Initialize vhub String Descriptors. */ > memcpy(&vhub->vhub_str_desc, &ast_vhub_strings, > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h > index 191f9fae7420..fac79ef6d669 100644 > --- a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h > +++ b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h > @@ -79,17 +79,9 @@ > #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) > @@ -213,6 +205,11 @@ > * * > ****************************************/ > > +/* > + * AST_VHUB_NUM_GEN_EPs and AST_VHUB_NUM_PORTS are kept to avoid breaking > + * existing AST2400/AST2500 platforms. AST2600 and future vhub revisions > + * should define number of downstream ports and endpoints in device tree. > + */ > #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 */ > @@ -315,7 +312,7 @@ struct ast_vhub_ep { > /* Registers */ > void __iomem *regs; > > - /* Index in global pool (0..14) */ > + /* Index in global pool (zero-based) */ > unsigned int g_idx; > > /* DMA Descriptors */ > @@ -345,7 +342,7 @@ 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; > > @@ -361,7 +358,8 @@ 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) > @@ -402,10 +400,12 @@ 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;
Hi Ben, On Thu, Feb 27, 2020 at 03:09:01PM +1100, Benjamin Herrenschmidt wrote: > On Wed, 2020-02-26 at 15:03 -0800, rentao.bupt@gmail.com wrote: > > From: Tao Ren <rentao.bupt@gmail.com> > > > > The patch introduces 2 DT properties ("aspeed,vhub-downstream-ports" and > > "aspeed,vhub-generic-endpoints") which replaces hardcoded port/endpoint > > number. It is to make it more convenient to add support for newer vhub > > revisions with different number of ports and endpoints. > > > > Signed-off-by: Tao Ren <rentao.bupt@gmail.com> > > Reviewed-by: Joel Stanley <joel@jms.id.au> > > With one minor nit that can be addressed in a subsequent patch (see > below) > > Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Thanks for the help on the patch series. > > - 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); > > } > > The 2400 and 2500 have very slow cores and every cycle counts in that > interrupt handler from my experience. I would sugggest you generate a > "mask" of all the device interrupts for enabled ports in struct vhub > and AND istat with that mask before going through the loop. Either that > or use find_next_zero_bit... > > I wouldn't gate merging this patch on this, it can be a subsequent > refinement. Got it. I will take care of the improvement in a follow-up patch. Cheers, Tao
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c index 90b134d5dca9..f8ab8e012f34 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c @@ -99,7 +99,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data) { struct ast_vhub *vhub = data; irqreturn_t iret = IRQ_NONE; - u32 istat; + u32 i, istat; /* Stale interrupt while tearing down */ if (!vhub->ep0_bufs) @@ -121,10 +121,10 @@ static irqreturn_t ast_vhub_irq(int irq, void *data) /* Handle generic EPs first */ if (istat & VHUB_IRQ_EP_POOL_ACK_STALL) { - u32 i, ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR); + u32 ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR); writel(ep_acks, vhub->regs + AST_VHUB_EP_ACK_ISR); - for (i = 0; ep_acks && i < AST_VHUB_NUM_GEN_EPs; i++) { + for (i = 0; ep_acks && i < vhub->max_epns; i++) { u32 mask = VHUB_EP_IRQ(i); if (ep_acks & mask) { ast_vhub_epn_ack_irq(&vhub->epns[i]); @@ -134,21 +134,11 @@ static irqreturn_t ast_vhub_irq(int irq, void *data) } /* Handle device interrupts */ - if (istat & (VHUB_IRQ_DEVICE1 | - VHUB_IRQ_DEVICE2 | - VHUB_IRQ_DEVICE3 | - VHUB_IRQ_DEVICE4 | - VHUB_IRQ_DEVICE5)) { - if (istat & VHUB_IRQ_DEVICE1) - ast_vhub_dev_irq(&vhub->ports[0].dev); - if (istat & VHUB_IRQ_DEVICE2) - ast_vhub_dev_irq(&vhub->ports[1].dev); - if (istat & VHUB_IRQ_DEVICE3) - ast_vhub_dev_irq(&vhub->ports[2].dev); - if (istat & VHUB_IRQ_DEVICE4) - ast_vhub_dev_irq(&vhub->ports[3].dev); - if (istat & VHUB_IRQ_DEVICE5) - ast_vhub_dev_irq(&vhub->ports[4].dev); + for (i = 0; i < vhub->max_ports; i++) { + u32 dev_mask = VHUB_IRQ_DEVICE1 << i; + + if (istat & dev_mask) + ast_vhub_dev_irq(&vhub->ports[i].dev); } /* Handle top-level vHub EP0 interrupts */ @@ -182,7 +172,7 @@ static irqreturn_t ast_vhub_irq(int irq, void *data) void ast_vhub_init_hw(struct ast_vhub *vhub) { - u32 ctrl; + u32 ctrl, port_mask, epn_mask; UDCDBG(vhub,"(Re)Starting HW ...\n"); @@ -222,15 +212,20 @@ void ast_vhub_init_hw(struct ast_vhub *vhub) } /* Reset all devices */ - writel(VHUB_SW_RESET_ALL, vhub->regs + AST_VHUB_SW_RESET); + port_mask = GENMASK(vhub->max_ports, 1); + writel(VHUB_SW_RESET_ROOT_HUB | + VHUB_SW_RESET_DMA_CONTROLLER | + VHUB_SW_RESET_EP_POOL | + port_mask, vhub->regs + AST_VHUB_SW_RESET); udelay(1); writel(0, vhub->regs + AST_VHUB_SW_RESET); /* Disable and cleanup EP ACK/NACK interrupts */ + epn_mask = GENMASK(vhub->max_epns - 1, 0); writel(0, vhub->regs + AST_VHUB_EP_ACK_IER); writel(0, vhub->regs + AST_VHUB_EP_NACK_IER); - writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_ACK_ISR); - writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_NACK_ISR); + writel(epn_mask, vhub->regs + AST_VHUB_EP_ACK_ISR); + writel(epn_mask, vhub->regs + AST_VHUB_EP_NACK_ISR); /* Default settings for EP0, enable HW hub EP1 */ writel(0, vhub->regs + AST_VHUB_EP0_CTRL); @@ -273,7 +268,7 @@ static int ast_vhub_remove(struct platform_device *pdev) return 0; /* Remove devices */ - for (i = 0; i < AST_VHUB_NUM_PORTS; i++) + for (i = 0; i < vhub->max_ports; i++) ast_vhub_del_dev(&vhub->ports[i].dev); spin_lock_irqsave(&vhub->lock, flags); @@ -295,7 +290,7 @@ static int ast_vhub_remove(struct platform_device *pdev) if (vhub->ep0_bufs) dma_free_coherent(&pdev->dev, AST_VHUB_EP0_MAX_PACKET * - (AST_VHUB_NUM_PORTS + 1), + (vhub->max_ports + 1), vhub->ep0_bufs, vhub->ep0_bufs_dma); vhub->ep0_bufs = NULL; @@ -309,11 +304,32 @@ static int ast_vhub_probe(struct platform_device *pdev) struct ast_vhub *vhub; struct resource *res; int i, rc = 0; + const struct device_node *np = pdev->dev.of_node; vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL); if (!vhub) return -ENOMEM; + rc = of_property_read_u32(np, "aspeed,vhub-downstream-ports", + &vhub->max_ports); + if (rc < 0) + vhub->max_ports = AST_VHUB_NUM_PORTS; + + vhub->ports = devm_kcalloc(&pdev->dev, vhub->max_ports, + sizeof(*vhub->ports), GFP_KERNEL); + if (!vhub->ports) + return -ENOMEM; + + rc = of_property_read_u32(np, "aspeed,vhub-generic-endpoints", + &vhub->max_epns); + if (rc < 0) + vhub->max_epns = AST_VHUB_NUM_GEN_EPs; + + vhub->epns = devm_kcalloc(&pdev->dev, vhub->max_epns, + sizeof(*vhub->epns), GFP_KERNEL); + if (!vhub->epns) + return -ENOMEM; + spin_lock_init(&vhub->lock); vhub->pdev = pdev; @@ -366,7 +382,7 @@ static int ast_vhub_probe(struct platform_device *pdev) */ vhub->ep0_bufs = dma_alloc_coherent(&pdev->dev, AST_VHUB_EP0_MAX_PACKET * - (AST_VHUB_NUM_PORTS + 1), + (vhub->max_ports + 1), &vhub->ep0_bufs_dma, GFP_KERNEL); if (!vhub->ep0_bufs) { dev_err(&pdev->dev, "Failed to allocate EP0 DMA buffers\n"); @@ -380,7 +396,7 @@ static int ast_vhub_probe(struct platform_device *pdev) ast_vhub_init_ep0(vhub, &vhub->ep0, NULL); /* Init devices */ - for (i = 0; i < AST_VHUB_NUM_PORTS && rc == 0; i++) + for (i = 0; i < vhub->max_ports && rc == 0; i++) rc = ast_vhub_init_dev(vhub, i); if (rc) goto err; diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c index 4008e7a51188..d268306a7bfe 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c @@ -77,7 +77,7 @@ static void ast_vhub_dev_enable(struct ast_vhub_dev *d) writel(d->ep0.buf_dma, d->regs + AST_VHUB_DEV_EP0_DATA); /* Clear stall on all EPs */ - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) { + for (i = 0; i < d->max_epns; i++) { struct ast_vhub_ep *ep = d->epns[i]; if (ep && (ep->epn.stalled || ep->epn.wedged)) { @@ -137,7 +137,7 @@ static int ast_vhub_ep_feature(struct ast_vhub_dev *d, is_set ? "SET" : "CLEAR", ep_num, wValue); if (ep_num == 0) return std_req_complete; - if (ep_num >= AST_VHUB_NUM_GEN_EPs || !d->epns[ep_num - 1]) + if (ep_num >= d->max_epns || !d->epns[ep_num - 1]) return std_req_stall; if (wValue != USB_ENDPOINT_HALT) return std_req_driver; @@ -181,7 +181,7 @@ static int ast_vhub_ep_status(struct ast_vhub_dev *d, DDBG(d, "GET_STATUS(ep%d)\n", ep_num); - if (ep_num >= AST_VHUB_NUM_GEN_EPs) + if (ep_num >= d->max_epns) return std_req_stall; if (ep_num != 0) { ep = d->epns[ep_num - 1]; @@ -299,7 +299,7 @@ static void ast_vhub_dev_nuke(struct ast_vhub_dev *d) { unsigned int i; - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) { + for (i = 0; i < d->max_epns; i++) { if (!d->epns[i]) continue; ast_vhub_nuke(d->epns[i], -ESHUTDOWN); @@ -416,10 +416,10 @@ static struct usb_ep *ast_vhub_udc_match_ep(struct usb_gadget *gadget, * that will allow the generic code to use our * assigned address. */ - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) + for (i = 0; i < d->max_epns; i++) if (d->epns[i] == NULL) break; - if (i >= AST_VHUB_NUM_GEN_EPs) + if (i >= d->max_epns) return NULL; addr = i + 1; @@ -526,6 +526,7 @@ void ast_vhub_del_dev(struct ast_vhub_dev *d) usb_del_gadget_udc(&d->gadget); device_unregister(d->port_dev); + kfree(d->epns); } static void ast_vhub_dev_release(struct device *dev) @@ -546,14 +547,25 @@ int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx) ast_vhub_init_ep0(vhub, &d->ep0, d); + /* + * A USB device can have up to 30 endpoints besides control + * endpoint 0. + */ + d->max_epns = min_t(u32, vhub->max_epns, 30); + d->epns = kcalloc(d->max_epns, sizeof(*d->epns), GFP_KERNEL); + if (!d->epns) + return -ENOMEM; + /* * The UDC core really needs us to have separate and uniquely * named "parent" devices for each port so we create a sub device * here for that purpose */ d->port_dev = kzalloc(sizeof(struct device), GFP_KERNEL); - if (!d->port_dev) - return -ENOMEM; + if (!d->port_dev) { + rc = -ENOMEM; + goto fail_alloc; + } device_initialize(d->port_dev); d->port_dev->release = ast_vhub_dev_release; d->port_dev->parent = parent; @@ -584,6 +596,8 @@ int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx) device_del(d->port_dev); fail_add: put_device(d->port_dev); + fail_alloc: + kfree(d->epns); return rc; } diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c index 7475c74aa5c5..0bd6b20435b8 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c @@ -800,10 +800,10 @@ struct ast_vhub_ep *ast_vhub_alloc_epn(struct ast_vhub_dev *d, u8 addr) /* Find a free one (no device) */ spin_lock_irqsave(&vhub->lock, flags); - for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) + for (i = 0; i < vhub->max_epns; i++) if (vhub->epns[i].dev == NULL) break; - if (i >= AST_VHUB_NUM_GEN_EPs) { + if (i >= vhub->max_epns) { spin_unlock_irqrestore(&vhub->lock, flags); return NULL; } diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c index 9c3027306b15..6e565c3dbb5b 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c @@ -502,7 +502,7 @@ 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)) @@ -585,7 +585,7 @@ 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]; @@ -628,7 +628,7 @@ 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]; @@ -674,7 +674,7 @@ 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--; @@ -755,7 +755,7 @@ 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)) @@ -778,7 +778,7 @@ 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)) @@ -812,7 +812,7 @@ 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 */ @@ -845,6 +845,7 @@ static void ast_vhub_init_desc(struct ast_vhub *vhub) /* Initialize vhub Hub Descriptor. */ memcpy(&vhub->vhub_hub_desc, &ast_vhub_hub_desc, sizeof(vhub->vhub_hub_desc)); + vhub->vhub_hub_desc.bNbrPorts = vhub->max_ports; /* Initialize vhub String Descriptors. */ memcpy(&vhub->vhub_str_desc, &ast_vhub_strings, diff --git a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h index 191f9fae7420..fac79ef6d669 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h +++ b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h @@ -79,17 +79,9 @@ #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) @@ -213,6 +205,11 @@ * * ****************************************/ +/* + * AST_VHUB_NUM_GEN_EPs and AST_VHUB_NUM_PORTS are kept to avoid breaking + * existing AST2400/AST2500 platforms. AST2600 and future vhub revisions + * should define number of downstream ports and endpoints in device tree. + */ #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 */ @@ -315,7 +312,7 @@ struct ast_vhub_ep { /* Registers */ void __iomem *regs; - /* Index in global pool (0..14) */ + /* Index in global pool (zero-based) */ unsigned int g_idx; /* DMA Descriptors */ @@ -345,7 +342,7 @@ 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; @@ -361,7 +358,8 @@ 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) @@ -402,10 +400,12 @@ 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;