Re: [PATCH 1/3] usb: gadget: aspeed: read vhub config from of_device_id
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2020-02-10 07:28:24
Also in:
linux-aspeed, linux-devicetree, linux-usb, lkml, openbmc
On Mon, 2020-02-10 at 02:47 +0000, Joel Stanley wrote:
On Fri, 31 Jan 2020 at 22:22, [off-list ref] wrote:quoted
From: Tao Ren <redacted> 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 <redacted>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 <joel@jms.id.au>quoted
--- 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.cb/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-quoted
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(structplatform_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(structplatform_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(structplatform_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(structplatform_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(structplatform_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(structplatform_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.cb/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(structast_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(structast_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(structast_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(structast_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.cb/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(structast_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.cb/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" functionbased 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(structwork_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_rcast_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_rcast_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_rcast_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.hb/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) -#defineVHUB_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 packetsize */ #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; - structast_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 linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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