| // SPDX-License-Identifier: GPL-2.0 |
| /* linux/drivers/usb/gadget/s3c-hsudc.c |
| * |
| * Copyright (c) 2010 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com/ |
| * |
| * S3C24XX USB 2.0 High-speed USB controller gadget driver |
| * |
| * The S3C24XX USB 2.0 high-speed USB controller supports upto 9 endpoints. |
| * Each endpoint can be configured as either in or out endpoint. Endpoints |
| * can be configured for Bulk or Interrupt transfer mode. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/platform_device.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| #include <linux/slab.h> |
| #include <linux/clk.h> |
| #include <linux/err.h> |
| #include <linux/usb/ch9.h> |
| #include <linux/usb/gadget.h> |
| #include <linux/usb/otg.h> |
| #include <linux/prefetch.h> |
| #include <linux/platform_data/s3c-hsudc.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/pm_runtime.h> |
| |
| #define S3C_HSUDC_REG(x) (x) |
| |
| /* Non-Indexed Registers */ |
| #define S3C_IR S3C_HSUDC_REG(0x00) /* Index Register */ |
| #define S3C_EIR S3C_HSUDC_REG(0x04) /* EP Intr Status */ |
| #define S3C_EIR_EP0 (1<<0) |
| #define S3C_EIER S3C_HSUDC_REG(0x08) /* EP Intr Enable */ |
| #define S3C_FAR S3C_HSUDC_REG(0x0c) /* Gadget Address */ |
| #define S3C_FNR S3C_HSUDC_REG(0x10) /* Frame Number */ |
| #define S3C_EDR S3C_HSUDC_REG(0x14) /* EP Direction */ |
| #define S3C_TR S3C_HSUDC_REG(0x18) /* Test Register */ |
| #define S3C_SSR S3C_HSUDC_REG(0x1c) /* System Status */ |
| #define S3C_SSR_DTZIEN_EN (0xff8f) |
| #define S3C_SSR_ERR (0xff80) |
| #define S3C_SSR_VBUSON (1 << 8) |
| #define S3C_SSR_HSP (1 << 4) |
| #define S3C_SSR_SDE (1 << 3) |
| #define S3C_SSR_RESUME (1 << 2) |
| #define S3C_SSR_SUSPEND (1 << 1) |
| #define S3C_SSR_RESET (1 << 0) |
| #define S3C_SCR S3C_HSUDC_REG(0x20) /* System Control */ |
| #define S3C_SCR_DTZIEN_EN (1 << 14) |
| #define S3C_SCR_RRD_EN (1 << 5) |
| #define S3C_SCR_SUS_EN (1 << 1) |
| #define S3C_SCR_RST_EN (1 << 0) |
| #define S3C_EP0SR S3C_HSUDC_REG(0x24) /* EP0 Status */ |
| #define S3C_EP0SR_EP0_LWO (1 << 6) |
| #define S3C_EP0SR_STALL (1 << 4) |
| #define S3C_EP0SR_TX_SUCCESS (1 << 1) |
| #define S3C_EP0SR_RX_SUCCESS (1 << 0) |
| #define S3C_EP0CR S3C_HSUDC_REG(0x28) /* EP0 Control */ |
| #define S3C_BR(_x) S3C_HSUDC_REG(0x60 + (_x * 4)) |
| |
| /* Indexed Registers */ |
| #define S3C_ESR S3C_HSUDC_REG(0x2c) /* EPn Status */ |
| #define S3C_ESR_FLUSH (1 << 6) |
| #define S3C_ESR_STALL (1 << 5) |
| #define S3C_ESR_LWO (1 << 4) |
| #define S3C_ESR_PSIF_ONE (1 << 2) |
| #define S3C_ESR_PSIF_TWO (2 << 2) |
| #define S3C_ESR_TX_SUCCESS (1 << 1) |
| #define S3C_ESR_RX_SUCCESS (1 << 0) |
| #define S3C_ECR S3C_HSUDC_REG(0x30) /* EPn Control */ |
| #define S3C_ECR_DUEN (1 << 7) |
| #define S3C_ECR_FLUSH (1 << 6) |
| #define S3C_ECR_STALL (1 << 1) |
| #define S3C_ECR_IEMS (1 << 0) |
| #define S3C_BRCR S3C_HSUDC_REG(0x34) /* Read Count */ |
| #define S3C_BWCR S3C_HSUDC_REG(0x38) /* Write Count */ |
| #define S3C_MPR S3C_HSUDC_REG(0x3c) /* Max Pkt Size */ |
| |
| #define WAIT_FOR_SETUP (0) |
| #define DATA_STATE_XMIT (1) |
| #define DATA_STATE_RECV (2) |
| |
| static const char * const s3c_hsudc_supply_names[] = { |
| "vdda", /* analog phy supply, 3.3V */ |
| "vddi", /* digital phy supply, 1.2V */ |
| "vddosc", /* oscillator supply, 1.8V - 3.3V */ |
| }; |
| |
| /** |
| * struct s3c_hsudc_ep - Endpoint representation used by driver. |
| * @ep: USB gadget layer representation of device endpoint. |
| * @name: Endpoint name (as required by ep autoconfiguration). |
| * @dev: Reference to the device controller to which this EP belongs. |
| * @desc: Endpoint descriptor obtained from the gadget driver. |
| * @queue: Transfer request queue for the endpoint. |
| * @stopped: Maintains state of endpoint, set if EP is halted. |
| * @bEndpointAddress: EP address (including direction bit). |
| * @fifo: Base address of EP FIFO. |
| */ |
| struct s3c_hsudc_ep { |
| struct usb_ep ep; |
| char name[20]; |
| struct s3c_hsudc *dev; |
| struct list_head queue; |
| u8 stopped; |
| u8 wedge; |
| u8 bEndpointAddress; |
| void __iomem *fifo; |
| }; |
| |
| /** |
| * struct s3c_hsudc_req - Driver encapsulation of USB gadget transfer request. |
| * @req: Reference to USB gadget transfer request. |
| * @queue: Used for inserting this request to the endpoint request queue. |
| */ |
| struct s3c_hsudc_req { |
| struct usb_request req; |
| struct list_head queue; |
| }; |
| |
| /** |
| * struct s3c_hsudc - Driver's abstraction of the device controller. |
| * @gadget: Instance of usb_gadget which is referenced by gadget driver. |
| * @driver: Reference to currently active gadget driver. |
| * @dev: The device reference used by probe function. |
| * @lock: Lock to synchronize the usage of Endpoints (EP's are indexed). |
| * @regs: Remapped base address of controller's register space. |
| * irq: IRQ number used by the controller. |
| * uclk: Reference to the controller clock. |
| * ep0state: Current state of EP0. |
| * ep: List of endpoints supported by the controller. |
| */ |
| struct s3c_hsudc { |
| struct usb_gadget gadget; |
| struct usb_gadget_driver *driver; |
| struct device *dev; |
| struct s3c24xx_hsudc_platdata *pd; |
| struct usb_phy *transceiver; |
| struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsudc_supply_names)]; |
| spinlock_t lock; |
| void __iomem *regs; |
| int irq; |
| struct clk *uclk; |
| int ep0state; |
| struct s3c_hsudc_ep ep[]; |
| }; |
| |
| #define ep_maxpacket(_ep) ((_ep)->ep.maxpacket) |
| #define ep_is_in(_ep) ((_ep)->bEndpointAddress & USB_DIR_IN) |
| #define ep_index(_ep) ((_ep)->bEndpointAddress & \ |
| USB_ENDPOINT_NUMBER_MASK) |
| |
| static const char driver_name[] = "s3c-udc"; |
| static const char ep0name[] = "ep0-control"; |
| |
| static inline struct s3c_hsudc_req *our_req(struct usb_request *req) |
| { |
| return container_of(req, struct s3c_hsudc_req, req); |
| } |
| |
| static inline struct s3c_hsudc_ep *our_ep(struct usb_ep *ep) |
| { |
| return container_of(ep, struct s3c_hsudc_ep, ep); |
| } |
| |
| static inline struct s3c_hsudc *to_hsudc(struct usb_gadget *gadget) |
| { |
| return container_of(gadget, struct s3c_hsudc, gadget); |
| } |
| |
| static inline void set_index(struct s3c_hsudc *hsudc, int ep_addr) |
| { |
| ep_addr &= USB_ENDPOINT_NUMBER_MASK; |
| writel(ep_addr, hsudc->regs + S3C_IR); |
| } |
| |
| static inline void __orr32(void __iomem *ptr, u32 val) |
| { |
| writel(readl(ptr) | val, ptr); |
| } |
| |
| /** |
| * s3c_hsudc_complete_request - Complete a transfer request. |
| * @hsep: Endpoint to which the request belongs. |
| * @hsreq: Transfer request to be completed. |
| * @status: Transfer completion status for the transfer request. |
| */ |
| static void s3c_hsudc_complete_request(struct s3c_hsudc_ep *hsep, |
| struct s3c_hsudc_req *hsreq, int status) |
| { |
| unsigned int stopped = hsep->stopped; |
| struct s3c_hsudc *hsudc = hsep->dev; |
| |
| list_del_init(&hsreq->queue); |
| hsreq->req.status = status; |
| |
| if (!ep_index(hsep)) { |
| hsudc->ep0state = WAIT_FOR_SETUP; |
| hsep->bEndpointAddress &= ~USB_DIR_IN; |
| } |
| |
| hsep->stopped = 1; |
| spin_unlock(&hsudc->lock); |
| usb_gadget_giveback_request(&hsep->ep, &hsreq->req); |
| spin_lock(&hsudc->lock); |
| hsep->stopped = stopped; |
| } |
| |
| /** |
| * s3c_hsudc_nuke_ep - Terminate all requests queued for a endpoint. |
| * @hsep: Endpoint for which queued requests have to be terminated. |
| * @status: Transfer completion status for the transfer request. |
| */ |
| static void s3c_hsudc_nuke_ep(struct s3c_hsudc_ep *hsep, int status) |
| { |
| struct s3c_hsudc_req *hsreq; |
| |
| while (!list_empty(&hsep->queue)) { |
| hsreq = list_entry(hsep->queue.next, |
| struct s3c_hsudc_req, queue); |
| s3c_hsudc_complete_request(hsep, hsreq, status); |
| } |
| } |
| |
| /** |
| * s3c_hsudc_stop_activity - Stop activity on all endpoints. |
| * @hsudc: Device controller for which EP activity is to be stopped. |
| * |
| * All the endpoints are stopped and any pending transfer requests if any on |
| * the endpoint are terminated. |
| */ |
| static void s3c_hsudc_stop_activity(struct s3c_hsudc *hsudc) |
| { |
| struct s3c_hsudc_ep *hsep; |
| int epnum; |
| |
| hsudc->gadget.speed = USB_SPEED_UNKNOWN; |
| |
| for (epnum = 0; epnum < hsudc->pd->epnum; epnum++) { |
| hsep = &hsudc->ep[epnum]; |
| hsep->stopped = 1; |
| s3c_hsudc_nuke_ep(hsep, -ESHUTDOWN); |
| } |
| } |
| |
| /** |
| * s3c_hsudc_read_setup_pkt - Read the received setup packet from EP0 fifo. |
| * @hsudc: Device controller from which setup packet is to be read. |
| * @buf: The buffer into which the setup packet is read. |
| * |
| * The setup packet received in the EP0 fifo is read and stored into a |
| * given buffer address. |
| */ |
| |
| static void s3c_hsudc_read_setup_pkt(struct s3c_hsudc *hsudc, u16 *buf) |
| { |
| int count; |
| |
| count = readl(hsudc->regs + S3C_BRCR); |
| while (count--) |
| *buf++ = (u16)readl(hsudc->regs + S3C_BR(0)); |
| |
| writel(S3C_EP0SR_RX_SUCCESS, hsudc->regs + S3C_EP0SR); |
| } |
| |
| /** |
| * s3c_hsudc_write_fifo - Write next chunk of transfer data to EP fifo. |
| * @hsep: Endpoint to which the data is to be written. |
| * @hsreq: Transfer request from which the next chunk of data is written. |
| * |
| * Write the next chunk of data from a transfer request to the endpoint FIFO. |
| * If the transfer request completes, 1 is returned, otherwise 0 is returned. |
| */ |
| static int s3c_hsudc_write_fifo(struct s3c_hsudc_ep *hsep, |
| struct s3c_hsudc_req *hsreq) |
| { |
| u16 *buf; |
| u32 max = ep_maxpacket(hsep); |
| u32 count, length; |
| bool is_last; |
| void __iomem *fifo = hsep->fifo; |
| |
| buf = hsreq->req.buf + hsreq->req.actual; |
| prefetch(buf); |
| |
| length = hsreq->req.length - hsreq->req.actual; |
| length = min(length, max); |
| hsreq->req.actual += length; |
| |
| writel(length, hsep->dev->regs + S3C_BWCR); |
| for (count = 0; count < length; count += 2) |
| writel(*buf++, fifo); |
| |
| if (count != max) { |
| is_last = true; |
| } else { |
| if (hsreq->req.length != hsreq->req.actual || hsreq->req.zero) |
| is_last = false; |
| else |
| is_last = true; |
| } |
| |
| if (is_last) { |
| s3c_hsudc_complete_request(hsep, hsreq, 0); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * s3c_hsudc_read_fifo - Read the next chunk of data from EP fifo. |
| * @hsep: Endpoint from which the data is to be read. |
| * @hsreq: Transfer request to which the next chunk of data read is written. |
| * |
| * Read the next chunk of data from the endpoint FIFO and a write it to the |
| * transfer request buffer. If the transfer request completes, 1 is returned, |
| * otherwise 0 is returned. |
| */ |
| static int s3c_hsudc_read_fifo(struct s3c_hsudc_ep *hsep, |
| struct s3c_hsudc_req *hsreq) |
| { |
| struct s3c_hsudc *hsudc = hsep->dev; |
| u32 csr, offset; |
| u16 *buf, word; |
| u32 buflen, rcnt, rlen; |
| void __iomem *fifo = hsep->fifo; |
| u32 is_short = 0; |
| |
| offset = (ep_index(hsep)) ? S3C_ESR : S3C_EP0SR; |
| csr = readl(hsudc->regs + offset); |
| if (!(csr & S3C_ESR_RX_SUCCESS)) |
| return -EINVAL; |
| |
| buf = hsreq->req.buf + hsreq->req.actual; |
| prefetchw(buf); |
| buflen = hsreq->req.length - hsreq->req.actual; |
| |
| rcnt = readl(hsudc->regs + S3C_BRCR); |
| rlen = (csr & S3C_ESR_LWO) ? (rcnt * 2 - 1) : (rcnt * 2); |
| |
| hsreq->req.actual += min(rlen, buflen); |
| is_short = (rlen < hsep->ep.maxpacket); |
| |
| while (rcnt-- != 0) { |
| word = (u16)readl(fifo); |
| if (buflen) { |
| *buf++ = word; |
| buflen--; |
| } else { |
| hsreq->req.status = -EOVERFLOW; |
| } |
| } |
| |
| writel(S3C_ESR_RX_SUCCESS, hsudc->regs + offset); |
| |
| if (is_short || hsreq->req.actual == hsreq->req.length) { |
| s3c_hsudc_complete_request(hsep, hsreq, 0); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * s3c_hsudc_epin_intr - Handle in-endpoint interrupt. |
| * @hsudc - Device controller for which the interrupt is to be handled. |
| * @ep_idx - Endpoint number on which an interrupt is pending. |
| * |
| * Handles interrupt for a in-endpoint. The interrupts that are handled are |
| * stall and data transmit complete interrupt. |
| */ |
| static void s3c_hsudc_epin_intr(struct s3c_hsudc *hsudc, u32 ep_idx) |
| { |
| struct s3c_hsudc_ep *hsep = &hsudc->ep[ep_idx]; |
| struct s3c_hsudc_req *hsreq; |
| u32 csr; |
| |
| csr = readl(hsudc->regs + S3C_ESR); |
| if (csr & S3C_ESR_STALL) { |
| writel(S3C_ESR_STALL, hsudc->regs + S3C_ESR); |
| return; |
| } |
| |
| if (csr & S3C_ESR_TX_SUCCESS) { |
| writel(S3C_ESR_TX_SUCCESS, hsudc->regs + S3C_ESR); |
| if (list_empty(&hsep->queue)) |
| return; |
| |
| hsreq = list_entry(hsep->queue.next, |
| struct s3c_hsudc_req, queue); |
| if ((s3c_hsudc_write_fifo(hsep, hsreq) == 0) && |
| (csr & S3C_ESR_PSIF_TWO)) |
| s3c_hsudc_write_fifo(hsep, hsreq); |
| } |
| } |
| |
| /** |
| * s3c_hsudc_epout_intr - Handle out-endpoint interrupt. |
| * @hsudc - Device controller for which the interrupt is to be handled. |
| * @ep_idx - Endpoint number on which an interrupt is pending. |
| * |
| * Handles interrupt for a out-endpoint. The interrupts that are handled are |
| * stall, flush and data ready interrupt. |
| */ |
| static void s3c_hsudc_epout_intr(struct s3c_hsudc *hsudc, u32 ep_idx) |
| { |
| struct s3c_hsudc_ep *hsep = &hsudc->ep[ep_idx]; |
| struct s3c_hsudc_req *hsreq; |
| u32 csr; |
| |
| csr = readl(hsudc->regs + S3C_ESR); |
| if (csr & S3C_ESR_STALL) { |
| writel(S3C_ESR_STALL, hsudc->regs + S3C_ESR); |
| return; |
| } |
| |
| if (csr & S3C_ESR_FLUSH) { |
| __orr32(hsudc->regs + S3C_ECR, S3C_ECR_FLUSH); |
| return; |
| } |
| |
| if (csr & S3C_ESR_RX_SUCCESS) { |
| if (list_empty(&hsep->queue)) |
| return; |
| |
| hsreq = list_entry(hsep->queue.next, |
| struct s3c_hsudc_req, queue); |
| if (((s3c_hsudc_read_fifo(hsep, hsreq)) == 0) && |
| (csr & S3C_ESR_PSIF_TWO)) |
| s3c_hsudc_read_fifo(hsep, hsreq); |
| } |
| } |
| |
| /** s3c_hsudc_set_halt - Set or clear a endpoint halt. |
| * @_ep: Endpoint on which halt has to be set or cleared. |
| * @value: 1 for setting halt on endpoint, 0 to clear halt. |
| * |
| * Set or clear endpoint halt. If halt is set, the endpoint is stopped. |
| * If halt is cleared, for in-endpoints, if there are any pending |
| * transfer requests, transfers are started. |
| */ |
| static int s3c_hsudc_set_halt(struct usb_ep *_ep, int value) |
| { |
| struct s3c_hsudc_ep *hsep = our_ep(_ep); |
| struct s3c_hsudc *hsudc = hsep->dev; |
| struct s3c_hsudc_req *hsreq; |
| unsigned long irqflags; |
| u32 ecr; |
| u32 offset; |
| |
| if (value && ep_is_in(hsep) && !list_empty(&hsep->queue)) |
| return -EAGAIN; |
| |
| spin_lock_irqsave(&hsudc->lock, irqflags); |
| set_index(hsudc, ep_index(hsep)); |
| offset = (ep_index(hsep)) ? S3C_ECR : S3C_EP0CR; |
| ecr = readl(hsudc->regs + offset); |
| |
| if (value) { |
| ecr |= S3C_ECR_STALL; |
| if (ep_index(hsep)) |
| ecr |= S3C_ECR_FLUSH; |
| hsep->stopped = 1; |
| } else { |
| ecr &= ~S3C_ECR_STALL; |
| hsep->stopped = hsep->wedge = 0; |
| } |
| writel(ecr, hsudc->regs + offset); |
| |
| if (ep_is_in(hsep) && !list_empty(&hsep->queue) && !value) { |
| hsreq = list_entry(hsep->queue.next, |
| struct s3c_hsudc_req, queue); |
| if (hsreq) |
| s3c_hsudc_write_fifo(hsep, hsreq); |
| } |
| |
| spin_unlock_irqrestore(&hsudc->lock, irqflags); |
| return 0; |
| } |
| |
| /** s3c_hsudc_set_wedge - Sets the halt feature with the clear requests ignored |
| * @_ep: Endpoint on which wedge has to be set. |
| * |
| * Sets the halt feature with the clear requests ignored. |
| */ |
| static int s3c_hsudc_set_wedge(struct usb_ep *_ep) |
| { |
| struct s3c_hsudc_ep *hsep = our_ep(_ep); |
| |
| if (!hsep) |
| return -EINVAL; |
| |
| hsep->wedge = 1; |
| return usb_ep_set_halt(_ep); |
| } |
| |
| /** s3c_hsudc_handle_reqfeat - Handle set feature or clear feature requests. |
| * @_ep: Device controller on which the set/clear feature needs to be handled. |
| * @ctrl: Control request as received on the endpoint 0. |
| * |
| * Handle set feature or clear feature control requests on the control endpoint. |
| */ |
| static int s3c_hsudc_handle_reqfeat(struct s3c_hsudc *hsudc, |
| struct usb_ctrlrequest *ctrl) |
| { |
| struct s3c_hsudc_ep *hsep; |
| bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE); |
| u8 ep_num = ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK; |
| |
| if (ctrl->bRequestType == USB_RECIP_ENDPOINT) { |
| hsep = &hsudc->ep[ep_num]; |
| switch (le16_to_cpu(ctrl->wValue)) { |
| case USB_ENDPOINT_HALT: |
| if (set || !hsep->wedge) |
| s3c_hsudc_set_halt(&hsep->ep, set); |
| return 0; |
| } |
| } |
| |
| return -ENOENT; |
| } |
| |
| /** |
| * s3c_hsudc_process_req_status - Handle get status control request. |
| * @hsudc: Device controller on which get status request has be handled. |
| * @ctrl: Control request as received on the endpoint 0. |
| * |
| * Handle get status control request received on control endpoint. |
| */ |
| static void s3c_hsudc_process_req_status(struct s3c_hsudc *hsudc, |
| struct usb_ctrlrequest *ctrl) |
| { |
| struct s3c_hsudc_ep *hsep0 = &hsudc->ep[0]; |
| struct s3c_hsudc_req hsreq; |
| struct s3c_hsudc_ep *hsep; |
| __le16 reply; |
| u8 epnum; |
| |
| switch (ctrl->bRequestType & USB_RECIP_MASK) { |
| case USB_RECIP_DEVICE: |
| reply = cpu_to_le16(0); |
| break; |
| |
| case USB_RECIP_INTERFACE: |
| reply = cpu_to_le16(0); |
| break; |
| |
| case USB_RECIP_ENDPOINT: |
| epnum = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; |
| hsep = &hsudc->ep[epnum]; |
| reply = cpu_to_le16(hsep->stopped ? 1 : 0); |
| break; |
| } |
| |
| INIT_LIST_HEAD(&hsreq.queue); |
| hsreq.req.length = 2; |
| hsreq.req.buf = &reply; |
| hsreq.req.actual = 0; |
| hsreq.req.complete = NULL; |
| s3c_hsudc_write_fifo(hsep0, &hsreq); |
| } |
| |
| /** |
| * s3c_hsudc_process_setup - Process control request received on endpoint 0. |
| * @hsudc: Device controller on which control request has been received. |
| * |
| * Read the control request received on endpoint 0, decode it and handle |
| * the request. |
| */ |
| static void s3c_hsudc_process_setup(struct s3c_hsudc *hsudc) |
| { |
| struct s3c_hsudc_ep *hsep = &hsudc->ep[0]; |
| struct usb_ctrlrequest ctrl = {0}; |
| int ret; |
| |
| s3c_hsudc_nuke_ep(hsep, -EPROTO); |
| s3c_hsudc_read_setup_pkt(hsudc, (u16 *)&ctrl); |
| |
| if (ctrl.bRequestType & USB_DIR_IN) { |
| hsep->bEndpointAddress |= USB_DIR_IN; |
| hsudc->ep0state = DATA_STATE_XMIT; |
| } else { |
| hsep->bEndpointAddress &= ~USB_DIR_IN; |
| hsudc->ep0state = DATA_STATE_RECV; |
| } |
| |
| switch (ctrl.bRequest) { |
| case USB_REQ_SET_ADDRESS: |
| if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE)) |
| break; |
| hsudc->ep0state = WAIT_FOR_SETUP; |
| return; |
| |
| case USB_REQ_GET_STATUS: |
| if ((ctrl.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) |
| break; |
| s3c_hsudc_process_req_status(hsudc, &ctrl); |
| return; |
| |
| case USB_REQ_SET_FEATURE: |
| case USB_REQ_CLEAR_FEATURE: |
| if ((ctrl.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) |
| break; |
| s3c_hsudc_handle_reqfeat(hsudc, &ctrl); |
| hsudc->ep0state = WAIT_FOR_SETUP; |
| return; |
| } |
| |
| if (hsudc->driver) { |
| spin_unlock(&hsudc->lock); |
| ret = hsudc->driver->setup(&hsudc->gadget, &ctrl); |
| spin_lock(&hsudc->lock); |
| |
| if (ctrl.bRequest == USB_REQ_SET_CONFIGURATION) { |
| hsep->bEndpointAddress &= ~USB_DIR_IN; |
| hsudc->ep0state = WAIT_FOR_SETUP; |
| } |
| |
| if (ret < 0) { |
| dev_err(hsudc->dev, "setup failed, returned %d\n", |
| ret); |
| s3c_hsudc_set_halt(&hsep->ep, 1); |
| hsudc->ep0state = WAIT_FOR_SETUP; |
| hsep->bEndpointAddress &= ~USB_DIR_IN; |
| } |
| } |
| } |
| |
| /** s3c_hsudc_handle_ep0_intr - Handle endpoint 0 interrupt. |
| * @hsudc: Device controller on which endpoint 0 interrupt has occurred. |
| * |
| * Handle endpoint 0 interrupt when it occurs. EP0 interrupt could occur |
| * when a stall handshake is sent to host or data is sent/received on |
| * endpoint 0. |
| */ |
| static void s3c_hsudc_handle_ep0_intr(struct s3c_hsudc *hsudc) |
| { |
| struct s3c_hsudc_ep *hsep = &hsudc->ep[0]; |
| struct s3c_hsudc_req *hsreq; |
| u32 csr = readl(hsudc->regs + S3C_EP0SR); |
| u32 ecr; |
| |
| if (csr & S3C_EP0SR_STALL) { |
| ecr = readl(hsudc->regs + S3C_EP0CR); |
| ecr &= ~(S3C_ECR_STALL | S3C_ECR_FLUSH); |
| writel(ecr, hsudc->regs + S3C_EP0CR); |
| |
| writel(S3C_EP0SR_STALL, hsudc->regs + S3C_EP0SR); |
| hsep->stopped = 0; |
| |
| s3c_hsudc_nuke_ep(hsep, -ECONNABORTED); |
| hsudc->ep0state = WAIT_FOR_SETUP; |
| hsep->bEndpointAddress &= ~USB_DIR_IN; |
| return; |
| } |
| |
| if (csr & S3C_EP0SR_TX_SUCCESS) { |
| writel(S3C_EP0SR_TX_SUCCESS, hsudc->regs + S3C_EP0SR); |
| if (ep_is_in(hsep)) { |
| if (list_empty(&hsep->queue)) |
| return; |
| |
| hsreq = list_entry(hsep->queue.next, |
| struct s3c_hsudc_req, queue); |
| s3c_hsudc_write_fifo(hsep, hsreq); |
| } |
| } |
| |
| if (csr & S3C_EP0SR_RX_SUCCESS) { |
| if (hsudc->ep0state == WAIT_FOR_SETUP) |
| s3c_hsudc_process_setup(hsudc); |
| else { |
| if (!ep_is_in(hsep)) { |
| if (list_empty(&hsep->queue)) |
| return; |
| hsreq = list_entry(hsep->queue.next, |
| struct s3c_hsudc_req, queue); |
| s3c_hsudc_read_fifo(hsep, hsreq); |
| } |
| } |
| } |
| } |
| |
| /** |
| * s3c_hsudc_ep_enable - Enable a endpoint. |
| * @_ep: The endpoint to be enabled. |
| * @desc: Endpoint descriptor. |
| * |
| * Enables a endpoint when called from the gadget driver. Endpoint stall if |
| * any is cleared, transfer type is configured and endpoint interrupt is |
| * enabled. |
| */ |
| static int s3c_hsudc_ep_enable(struct usb_ep *_ep, |
| const struct usb_endpoint_descriptor *desc) |
| { |
| struct s3c_hsudc_ep *hsep; |
| struct s3c_hsudc *hsudc; |
| unsigned long flags; |
| u32 ecr = 0; |
| |
| hsep = our_ep(_ep); |
| if (!_ep || !desc || _ep->name == ep0name |
| || desc->bDescriptorType != USB_DT_ENDPOINT |
| || hsep->bEndpointAddress != desc->bEndpointAddress |
| || ep_maxpacket(hsep) < usb_endpoint_maxp(desc)) |
| return -EINVAL; |
| |
| if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK |
| && usb_endpoint_maxp(desc) != ep_maxpacket(hsep)) |
| || !desc->wMaxPacketSize) |
| return -ERANGE; |
| |
| hsudc = hsep->dev; |
| if (!hsudc->driver || hsudc->gadget.speed == USB_SPEED_UNKNOWN) |
| return -ESHUTDOWN; |
| |
| spin_lock_irqsave(&hsudc->lock, flags); |
| |
| set_index(hsudc, hsep->bEndpointAddress); |
| ecr |= ((usb_endpoint_xfer_int(desc)) ? S3C_ECR_IEMS : S3C_ECR_DUEN); |
| writel(ecr, hsudc->regs + S3C_ECR); |
| |
| hsep->stopped = hsep->wedge = 0; |
| hsep->ep.desc = desc; |
| hsep->ep.maxpacket = usb_endpoint_maxp(desc); |
| |
| s3c_hsudc_set_halt(_ep, 0); |
| __set_bit(ep_index(hsep), hsudc->regs + S3C_EIER); |
| |
| spin_unlock_irqrestore(&hsudc->lock, flags); |
| return 0; |
| } |
| |
| /** |
| * s3c_hsudc_ep_disable - Disable a endpoint. |
| * @_ep: The endpoint to be disabled. |
| * @desc: Endpoint descriptor. |
| * |
| * Disables a endpoint when called from the gadget driver. |
| */ |
| static int s3c_hsudc_ep_disable(struct usb_ep *_ep) |
| { |
| struct s3c_hsudc_ep *hsep = our_ep(_ep); |
| struct s3c_hsudc *hsudc = hsep->dev; |
| unsigned long flags; |
| |
| if (!_ep || !hsep->ep.desc) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&hsudc->lock, flags); |
| |
| set_index(hsudc, hsep->bEndpointAddress); |
| __clear_bit(ep_index(hsep), hsudc->regs + S3C_EIER); |
| |
| s3c_hsudc_nuke_ep(hsep, -ESHUTDOWN); |
| |
| hsep->ep.desc = NULL; |
| hsep->stopped = 1; |
| |
| spin_unlock_irqrestore(&hsudc->lock, flags); |
| return 0; |
| } |
| |
| /** |
| * s3c_hsudc_alloc_request - Allocate a new request. |
| * @_ep: Endpoint for which request is allocated (not used). |
| * @gfp_flags: Flags used for the allocation. |
| * |
| * Allocates a single transfer request structure when called from gadget driver. |
| */ |
| static struct usb_request *s3c_hsudc_alloc_request(struct usb_ep *_ep, |
| gfp_t gfp_flags) |
| { |
| struct s3c_hsudc_req *hsreq; |
| |
| hsreq = kzalloc(sizeof(*hsreq), gfp_flags); |
| if (!hsreq) |
| return NULL; |
| |
| INIT_LIST_HEAD(&hsreq->queue); |
| return &hsreq->req; |
| } |
| |
| /** |
| * s3c_hsudc_free_request - Deallocate a request. |
| * @ep: Endpoint for which request is deallocated (not used). |
| * @_req: Request to be deallocated. |
| * |
| * Allocates a single transfer request structure when called from gadget driver. |
| */ |
| static void s3c_hsudc_free_request(struct usb_ep *ep, struct usb_request *_req) |
| { |
| struct s3c_hsudc_req *hsreq; |
| |
| hsreq = our_req(_req); |
| WARN_ON(!list_empty(&hsreq->queue)); |
| kfree(hsreq); |
| } |
| |
| /** |
| * s3c_hsudc_queue - Queue a transfer request for the endpoint. |
| * @_ep: Endpoint for which the request is queued. |
| * @_req: Request to be queued. |
| * @gfp_flags: Not used. |
| * |
| * Start or enqueue a request for a endpoint when called from gadget driver. |
| */ |
| static int s3c_hsudc_queue(struct usb_ep *_ep, struct usb_request *_req, |
| gfp_t gfp_flags) |
| { |
| struct s3c_hsudc_req *hsreq; |
| struct s3c_hsudc_ep *hsep; |
| struct s3c_hsudc *hsudc; |
| unsigned long flags; |
| u32 offset; |
| u32 csr; |
| |
| hsreq = our_req(_req); |
| if ((!_req || !_req->complete || !_req->buf || |
| !list_empty(&hsreq->queue))) |
| return -EINVAL; |
| |
| hsep = our_ep(_ep); |
| hsudc = hsep->dev; |
| if (!hsudc->driver || hsudc->gadget.speed == USB_SPEED_UNKNOWN) |
| return -ESHUTDOWN; |
| |
| spin_lock_irqsave(&hsudc->lock, flags); |
| set_index(hsudc, hsep->bEndpointAddress); |
| |
| _req->status = -EINPROGRESS; |
| _req->actual = 0; |
| |
| if (!ep_index(hsep) && _req->length == 0) { |
| hsudc->ep0state = WAIT_FOR_SETUP; |
| s3c_hsudc_complete_request(hsep, hsreq, 0); |
| spin_unlock_irqrestore(&hsudc->lock, flags); |
| return 0; |
| } |
| |
| if (list_empty(&hsep->queue) && !hsep->stopped) { |
| offset = (ep_index(hsep)) ? S3C_ESR : S3C_EP0SR; |
| if (ep_is_in(hsep)) { |
| csr = readl(hsudc->regs + offset); |
| if (!(csr & S3C_ESR_TX_SUCCESS) && |
| (s3c_hsudc_write_fifo(hsep, hsreq) == 1)) |
| hsreq = NULL; |
| } else { |
| csr = readl(hsudc->regs + offset); |
| if ((csr & S3C_ESR_RX_SUCCESS) |
| && (s3c_hsudc_read_fifo(hsep, hsreq) == 1)) |
| hsreq = NULL; |
| } |
| } |
| |
| if (hsreq) |
| list_add_tail(&hsreq->queue, &hsep->queue); |
| |
| spin_unlock_irqrestore(&hsudc->lock, flags); |
| return 0; |
| } |
| |
| /** |
| * s3c_hsudc_dequeue - Dequeue a transfer request from an endpoint. |
| * @_ep: Endpoint from which the request is dequeued. |
| * @_req: Request to be dequeued. |
| * |
| * Dequeue a request from a endpoint when called from gadget driver. |
| */ |
| static int s3c_hsudc_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| { |
| struct s3c_hsudc_ep *hsep = our_ep(_ep); |
| struct s3c_hsudc *hsudc = hsep->dev; |
| struct s3c_hsudc_req *hsreq = NULL, *iter; |
| unsigned long flags; |
| |
| hsep = our_ep(_ep); |
| if (!_ep || hsep->ep.name == ep0name) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&hsudc->lock, flags); |
| |
| list_for_each_entry(iter, &hsep->queue, queue) { |
| if (&iter->req != _req) |
| continue; |
| hsreq = iter; |
| break; |
| } |
| if (!hsreq) { |
| spin_unlock_irqrestore(&hsudc->lock, flags); |
| return -EINVAL; |
| } |
| |
| set_index(hsudc, hsep->bEndpointAddress); |
| s3c_hsudc_complete_request(hsep, hsreq, -ECONNRESET); |
| |
| spin_unlock_irqrestore(&hsudc->lock, flags); |
| return 0; |
| } |
| |
| static const struct usb_ep_ops s3c_hsudc_ep_ops = { |
| .enable = s3c_hsudc_ep_enable, |
| .disable = s3c_hsudc_ep_disable, |
| .alloc_request = s3c_hsudc_alloc_request, |
| .free_request = s3c_hsudc_free_request, |
| .queue = s3c_hsudc_queue, |
| .dequeue = s3c_hsudc_dequeue, |
| .set_halt = s3c_hsudc_set_halt, |
| .set_wedge = s3c_hsudc_set_wedge, |
| }; |
| |
| /** |
| * s3c_hsudc_initep - Initialize a endpoint to default state. |
| * @hsudc - Reference to the device controller. |
| * @hsep - Endpoint to be initialized. |
| * @epnum - Address to be assigned to the endpoint. |
| * |
| * Initialize a endpoint with default configuration. |
| */ |
| static void s3c_hsudc_initep(struct s3c_hsudc *hsudc, |
| struct s3c_hsudc_ep *hsep, int epnum) |
| { |
| char *dir; |
| |
| if ((epnum % 2) == 0) { |
| dir = "out"; |
| } else { |
| dir = "in"; |
| hsep->bEndpointAddress = USB_DIR_IN; |
| } |
| |
| hsep->bEndpointAddress |= epnum; |
| if (epnum) |
| snprintf(hsep->name, sizeof(hsep->name), "ep%d%s", epnum, dir); |
| else |
| snprintf(hsep->name, sizeof(hsep->name), "%s", ep0name); |
| |
| INIT_LIST_HEAD(&hsep->queue); |
| INIT_LIST_HEAD(&hsep->ep.ep_list); |
| if (epnum) |
| list_add_tail(&hsep->ep.ep_list, &hsudc->gadget.ep_list); |
| |
| hsep->dev = hsudc; |
| hsep->ep.name = hsep->name; |
| usb_ep_set_maxpacket_limit(&hsep->ep, epnum ? 512 : 64); |
| hsep->ep.ops = &s3c_hsudc_ep_ops; |
| hsep->fifo = hsudc->regs + S3C_BR(epnum); |
| hsep->ep.desc = NULL; |
| hsep->stopped = 0; |
| hsep->wedge = 0; |
| |
| if (epnum == 0) { |
| hsep->ep.caps.type_control = true; |
| hsep->ep.caps.dir_in = true; |
| hsep->ep.caps.dir_out = true; |
| } else { |
| hsep->ep.caps.type_iso = true; |
| hsep->ep.caps.type_bulk = true; |
| hsep->ep.caps.type_int = true; |
| } |
| |
| if (epnum & 1) |
| hsep->ep.caps.dir_in = true; |
| else |
| hsep->ep.caps.dir_out = true; |
| |
| set_index(hsudc, epnum); |
| writel(hsep->ep.maxpacket, hsudc->regs + S3C_MPR); |
| } |
| |
| /** |
| * s3c_hsudc_setup_ep - Configure all endpoints to default state. |
| * @hsudc: Reference to device controller. |
| * |
| * Configures all endpoints to default state. |
| */ |
| static void s3c_hsudc_setup_ep(struct s3c_hsudc *hsudc) |
| { |
| int epnum; |
| |
| hsudc->ep0state = WAIT_FOR_SETUP; |
| INIT_LIST_HEAD(&hsudc->gadget.ep_list); |
| for (epnum = 0; epnum < hsudc->pd->epnum; epnum++) |
| s3c_hsudc_initep(hsudc, &hsudc->ep[epnum], epnum); |
| } |
| |
| /** |
| * s3c_hsudc_reconfig - Reconfigure the device controller to default state. |
| * @hsudc: Reference to device controller. |
| * |
| * Reconfigures the device controller registers to a default state. |
| */ |
| static void s3c_hsudc_reconfig(struct s3c_hsudc *hsudc) |
| { |
| writel(0xAA, hsudc->regs + S3C_EDR); |
| writel(1, hsudc->regs + S3C_EIER); |
| writel(0, hsudc->regs + S3C_TR); |
| writel(S3C_SCR_DTZIEN_EN | S3C_SCR_RRD_EN | S3C_SCR_SUS_EN | |
| S3C_SCR_RST_EN, hsudc->regs + S3C_SCR); |
| writel(0, hsudc->regs + S3C_EP0CR); |
| |
| s3c_hsudc_setup_ep(hsudc); |
| } |
| |
| /** |
| * s3c_hsudc_irq - Interrupt handler for device controller. |
| * @irq: Not used. |
| * @_dev: Reference to the device controller. |
| * |
| * Interrupt handler for the device controller. This handler handles controller |
| * interrupts and endpoint interrupts. |
| */ |
| static irqreturn_t s3c_hsudc_irq(int irq, void *_dev) |
| { |
| struct s3c_hsudc *hsudc = _dev; |
| struct s3c_hsudc_ep *hsep; |
| u32 ep_intr; |
| u32 sys_status; |
| u32 ep_idx; |
| |
| spin_lock(&hsudc->lock); |
| |
| sys_status = readl(hsudc->regs + S3C_SSR); |
| ep_intr = readl(hsudc->regs + S3C_EIR) & 0x3FF; |
| |
| if (!ep_intr && !(sys_status & S3C_SSR_DTZIEN_EN)) { |
| spin_unlock(&hsudc->lock); |
| return IRQ_HANDLED; |
| } |
| |
| if (sys_status) { |
| if (sys_status & S3C_SSR_VBUSON) |
| writel(S3C_SSR_VBUSON, hsudc->regs + S3C_SSR); |
| |
| if (sys_status & S3C_SSR_ERR) |
| writel(S3C_SSR_ERR, hsudc->regs + S3C_SSR); |
| |
| if (sys_status & S3C_SSR_SDE) { |
| writel(S3C_SSR_SDE, hsudc->regs + S3C_SSR); |
| hsudc->gadget.speed = (sys_status & S3C_SSR_HSP) ? |
| USB_SPEED_HIGH : USB_SPEED_FULL; |
| } |
| |
| if (sys_status & S3C_SSR_SUSPEND) { |
| writel(S3C_SSR_SUSPEND, hsudc->regs + S3C_SSR); |
| if (hsudc->gadget.speed != USB_SPEED_UNKNOWN |
| && hsudc->driver && hsudc->driver->suspend) |
| hsudc->driver->suspend(&hsudc->gadget); |
| } |
| |
| if (sys_status & S3C_SSR_RESUME) { |
| writel(S3C_SSR_RESUME, hsudc->regs + S3C_SSR); |
| if (hsudc->gadget.speed != USB_SPEED_UNKNOWN |
| && hsudc->driver && hsudc->driver->resume) |
| hsudc->driver->resume(&hsudc->gadget); |
| } |
| |
| if (sys_status & S3C_SSR_RESET) { |
| writel(S3C_SSR_RESET, hsudc->regs + S3C_SSR); |
| for (ep_idx = 0; ep_idx < hsudc->pd->epnum; ep_idx++) { |
| hsep = &hsudc->ep[ep_idx]; |
| hsep->stopped = 1; |
| s3c_hsudc_nuke_ep(hsep, -ECONNRESET); |
| } |
| s3c_hsudc_reconfig(hsudc); |
| hsudc->ep0state = WAIT_FOR_SETUP; |
| } |
| } |
| |
| if (ep_intr & S3C_EIR_EP0) { |
| writel(S3C_EIR_EP0, hsudc->regs + S3C_EIR); |
| set_index(hsudc, 0); |
| s3c_hsudc_handle_ep0_intr(hsudc); |
| } |
| |
| ep_intr >>= 1; |
| ep_idx = 1; |
| while (ep_intr) { |
| if (ep_intr & 1) { |
| hsep = &hsudc->ep[ep_idx]; |
| set_index(hsudc, ep_idx); |
| writel(1 << ep_idx, hsudc->regs + S3C_EIR); |
| if (ep_is_in(hsep)) |
| s3c_hsudc_epin_intr(hsudc, ep_idx); |
| else |
| s3c_hsudc_epout_intr(hsudc, ep_idx); |
| } |
| ep_intr >>= 1; |
| ep_idx++; |
| } |
| |
| spin_unlock(&hsudc->lock); |
| return IRQ_HANDLED; |
| } |
| |
| static int s3c_hsudc_start(struct usb_gadget *gadget, |
| struct usb_gadget_driver *driver) |
| { |
| struct s3c_hsudc *hsudc = to_hsudc(gadget); |
| int ret; |
| |
| if (!driver |
| || driver->max_speed < USB_SPEED_FULL |
| || !driver->setup) |
| return -EINVAL; |
| |
| if (!hsudc) |
| return -ENODEV; |
| |
| if (hsudc->driver) |
| return -EBUSY; |
| |
| hsudc->driver = driver; |
| |
| ret = regulator_bulk_enable(ARRAY_SIZE(hsudc->supplies), |
| hsudc->supplies); |
| if (ret != 0) { |
| dev_err(hsudc->dev, "failed to enable supplies: %d\n", ret); |
| goto err_supplies; |
| } |
| |
| /* connect to bus through transceiver */ |
| if (!IS_ERR_OR_NULL(hsudc->transceiver)) { |
| ret = otg_set_peripheral(hsudc->transceiver->otg, |
| &hsudc->gadget); |
| if (ret) { |
| dev_err(hsudc->dev, "%s: can't bind to transceiver\n", |
| hsudc->gadget.name); |
| goto err_otg; |
| } |
| } |
| |
| enable_irq(hsudc->irq); |
| s3c_hsudc_reconfig(hsudc); |
| |
| pm_runtime_get_sync(hsudc->dev); |
| |
| if (hsudc->pd->phy_init) |
| hsudc->pd->phy_init(); |
| if (hsudc->pd->gpio_init) |
| hsudc->pd->gpio_init(); |
| |
| return 0; |
| err_otg: |
| regulator_bulk_disable(ARRAY_SIZE(hsudc->supplies), hsudc->supplies); |
| err_supplies: |
| hsudc->driver = NULL; |
| return ret; |
| } |
| |
| static int s3c_hsudc_stop(struct usb_gadget *gadget) |
| { |
| struct s3c_hsudc *hsudc = to_hsudc(gadget); |
| unsigned long flags; |
| |
| if (!hsudc) |
| return -ENODEV; |
| |
| spin_lock_irqsave(&hsudc->lock, flags); |
| hsudc->gadget.speed = USB_SPEED_UNKNOWN; |
| if (hsudc->pd->phy_uninit) |
| hsudc->pd->phy_uninit(); |
| |
| pm_runtime_put(hsudc->dev); |
| |
| if (hsudc->pd->gpio_uninit) |
| hsudc->pd->gpio_uninit(); |
| s3c_hsudc_stop_activity(hsudc); |
| spin_unlock_irqrestore(&hsudc->lock, flags); |
| |
| if (!IS_ERR_OR_NULL(hsudc->transceiver)) |
| (void) otg_set_peripheral(hsudc->transceiver->otg, NULL); |
| |
| disable_irq(hsudc->irq); |
| |
| regulator_bulk_disable(ARRAY_SIZE(hsudc->supplies), hsudc->supplies); |
| hsudc->driver = NULL; |
| |
| return 0; |
| } |
| |
| static inline u32 s3c_hsudc_read_frameno(struct s3c_hsudc *hsudc) |
| { |
| return readl(hsudc->regs + S3C_FNR) & 0x3FF; |
| } |
| |
| static int s3c_hsudc_gadget_getframe(struct usb_gadget *gadget) |
| { |
| return s3c_hsudc_read_frameno(to_hsudc(gadget)); |
| } |
| |
| static int s3c_hsudc_vbus_draw(struct usb_gadget *gadget, unsigned mA) |
| { |
| struct s3c_hsudc *hsudc = to_hsudc(gadget); |
| |
| if (!hsudc) |
| return -ENODEV; |
| |
| if (!IS_ERR_OR_NULL(hsudc->transceiver)) |
| return usb_phy_set_power(hsudc->transceiver, mA); |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static const struct usb_gadget_ops s3c_hsudc_gadget_ops = { |
| .get_frame = s3c_hsudc_gadget_getframe, |
| .udc_start = s3c_hsudc_start, |
| .udc_stop = s3c_hsudc_stop, |
| .vbus_draw = s3c_hsudc_vbus_draw, |
| }; |
| |
| static int s3c_hsudc_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct s3c_hsudc *hsudc; |
| struct s3c24xx_hsudc_platdata *pd = dev_get_platdata(&pdev->dev); |
| int ret, i; |
| |
| hsudc = devm_kzalloc(&pdev->dev, struct_size(hsudc, ep, pd->epnum), |
| GFP_KERNEL); |
| if (!hsudc) |
| return -ENOMEM; |
| |
| platform_set_drvdata(pdev, dev); |
| hsudc->dev = dev; |
| hsudc->pd = dev_get_platdata(&pdev->dev); |
| |
| hsudc->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); |
| |
| for (i = 0; i < ARRAY_SIZE(hsudc->supplies); i++) |
| hsudc->supplies[i].supply = s3c_hsudc_supply_names[i]; |
| |
| ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hsudc->supplies), |
| hsudc->supplies); |
| if (ret != 0) { |
| if (ret != -EPROBE_DEFER) |
| dev_err(dev, "failed to request supplies: %d\n", ret); |
| goto err_supplies; |
| } |
| |
| hsudc->regs = devm_platform_ioremap_resource(pdev, 0); |
| if (IS_ERR(hsudc->regs)) { |
| ret = PTR_ERR(hsudc->regs); |
| goto err_res; |
| } |
| |
| spin_lock_init(&hsudc->lock); |
| |
| hsudc->gadget.max_speed = USB_SPEED_HIGH; |
| hsudc->gadget.ops = &s3c_hsudc_gadget_ops; |
| hsudc->gadget.name = dev_name(dev); |
| hsudc->gadget.ep0 = &hsudc->ep[0].ep; |
| hsudc->gadget.is_otg = 0; |
| hsudc->gadget.is_a_peripheral = 0; |
| hsudc->gadget.speed = USB_SPEED_UNKNOWN; |
| |
| s3c_hsudc_setup_ep(hsudc); |
| |
| ret = platform_get_irq(pdev, 0); |
| if (ret < 0) |
| goto err_res; |
| hsudc->irq = ret; |
| |
| ret = devm_request_irq(&pdev->dev, hsudc->irq, s3c_hsudc_irq, 0, |
| driver_name, hsudc); |
| if (ret < 0) { |
| dev_err(dev, "irq request failed\n"); |
| goto err_res; |
| } |
| |
| hsudc->uclk = devm_clk_get(&pdev->dev, "usb-device"); |
| if (IS_ERR(hsudc->uclk)) { |
| dev_err(dev, "failed to find usb-device clock source\n"); |
| ret = PTR_ERR(hsudc->uclk); |
| goto err_res; |
| } |
| clk_enable(hsudc->uclk); |
| |
| local_irq_disable(); |
| |
| disable_irq(hsudc->irq); |
| local_irq_enable(); |
| |
| ret = usb_add_gadget_udc(&pdev->dev, &hsudc->gadget); |
| if (ret) |
| goto err_add_udc; |
| |
| pm_runtime_enable(dev); |
| |
| return 0; |
| err_add_udc: |
| clk_disable(hsudc->uclk); |
| err_res: |
| if (!IS_ERR_OR_NULL(hsudc->transceiver)) |
| usb_put_phy(hsudc->transceiver); |
| |
| err_supplies: |
| return ret; |
| } |
| |
| static struct platform_driver s3c_hsudc_driver = { |
| .driver = { |
| .name = "s3c-hsudc", |
| }, |
| .probe = s3c_hsudc_probe, |
| }; |
| |
| module_platform_driver(s3c_hsudc_driver); |
| |
| MODULE_DESCRIPTION("Samsung S3C24XX USB high-speed controller driver"); |
| MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:s3c-hsudc"); |