+++ /dev/null
-// 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");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * linux/drivers/usb/gadget/s3c2410_udc.c
- *
- * Samsung S3C24xx series on-chip full speed USB device controllers
- *
- * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
- * Additional cleanups by Ben Dooks <ben-linux@fluff.org>
- */
-
-#define pr_fmt(fmt) "s3c2410_udc: " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/timer.h>
-#include <linux/list.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/gpio/consumer.h>
-#include <linux/prefetch.h>
-#include <linux/io.h>
-
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-
-#include <linux/usb.h>
-#include <linux/usb/gadget.h>
-
-#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <asm/unaligned.h>
-
-#include <linux/platform_data/usb-s3c2410_udc.h>
-
-#include "s3c2410_udc.h"
-#include "s3c2410_udc_regs.h"
-
-#define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
-#define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
- "Arnaud Patard <arnaud.patard@rtp-net.org>"
-
-static const char gadget_name[] = "s3c2410_udc";
-static const char driver_desc[] = DRIVER_DESC;
-
-static struct s3c2410_udc *the_controller;
-static struct clk *udc_clock;
-static struct clk *usb_bus_clock;
-static void __iomem *base_addr;
-static int irq_usbd;
-static struct dentry *s3c2410_udc_debugfs_root;
-
-static inline u32 udc_read(u32 reg)
-{
- return readb(base_addr + reg);
-}
-
-static inline void udc_write(u32 value, u32 reg)
-{
- writeb(value, base_addr + reg);
-}
-
-static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
-{
- writeb(value, base + reg);
-}
-
-static struct s3c2410_udc_mach_info *udc_info;
-
-/*************************** DEBUG FUNCTION ***************************/
-#define DEBUG_NORMAL 1
-#define DEBUG_VERBOSE 2
-
-#ifdef CONFIG_USB_S3C2410_DEBUG
-#define USB_S3C2410_DEBUG_LEVEL 0
-
-static uint32_t s3c2410_ticks = 0;
-
-__printf(2, 3)
-static void dprintk(int level, const char *fmt, ...)
-{
- static long prevticks;
- static int invocation;
- struct va_format vaf;
- va_list args;
-
- if (level > USB_S3C2410_DEBUG_LEVEL)
- return;
-
- va_start(args, fmt);
-
- vaf.fmt = fmt;
- vaf.va = &args;
-
- if (s3c2410_ticks != prevticks) {
- prevticks = s3c2410_ticks;
- invocation = 0;
- }
-
- pr_debug("%1lu.%02d USB: %pV", prevticks, invocation++, &vaf);
-
- va_end(args);
-}
-#else
-__printf(2, 3)
-static void dprintk(int level, const char *fmt, ...)
-{
-}
-#endif
-
-static int s3c2410_udc_debugfs_show(struct seq_file *m, void *p)
-{
- u32 addr_reg, pwr_reg, ep_int_reg, usb_int_reg;
- u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
- u32 ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2;
- u32 ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2;
-
- addr_reg = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
- pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
- ep_int_reg = udc_read(S3C2410_UDC_EP_INT_REG);
- usb_int_reg = udc_read(S3C2410_UDC_USB_INT_REG);
- ep_int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
- usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
- udc_write(0, S3C2410_UDC_INDEX_REG);
- ep0_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
- udc_write(1, S3C2410_UDC_INDEX_REG);
- ep1_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
- ep1_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
- ep1_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
- ep1_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
- udc_write(2, S3C2410_UDC_INDEX_REG);
- ep2_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
- ep2_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
- ep2_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
- ep2_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
-
- seq_printf(m, "FUNC_ADDR_REG : 0x%04X\n"
- "PWR_REG : 0x%04X\n"
- "EP_INT_REG : 0x%04X\n"
- "USB_INT_REG : 0x%04X\n"
- "EP_INT_EN_REG : 0x%04X\n"
- "USB_INT_EN_REG : 0x%04X\n"
- "EP0_CSR : 0x%04X\n"
- "EP1_I_CSR1 : 0x%04X\n"
- "EP1_I_CSR2 : 0x%04X\n"
- "EP1_O_CSR1 : 0x%04X\n"
- "EP1_O_CSR2 : 0x%04X\n"
- "EP2_I_CSR1 : 0x%04X\n"
- "EP2_I_CSR2 : 0x%04X\n"
- "EP2_O_CSR1 : 0x%04X\n"
- "EP2_O_CSR2 : 0x%04X\n",
- addr_reg, pwr_reg, ep_int_reg, usb_int_reg,
- ep_int_en_reg, usb_int_en_reg, ep0_csr,
- ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2,
- ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2
- );
-
- return 0;
-}
-DEFINE_SHOW_ATTRIBUTE(s3c2410_udc_debugfs);
-
-/* io macros */
-
-static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
-{
- udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
- udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
- S3C2410_UDC_EP0_CSR_REG);
-}
-
-static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
-{
- udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
- writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
-}
-
-static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
-{
- udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
- udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
-}
-
-static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
-{
- udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
- udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
-}
-
-static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
-{
- udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
- udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
-}
-
-static inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
-{
- udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
- udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
-}
-
-static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
-{
- udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
-
- udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
- | S3C2410_UDC_EP0_CSR_DE),
- S3C2410_UDC_EP0_CSR_REG);
-}
-
-static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
-{
- udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
- udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
- | S3C2410_UDC_EP0_CSR_DE),
- S3C2410_UDC_EP0_CSR_REG);
-}
-
-/*------------------------- I/O ----------------------------------*/
-
-/*
- * s3c2410_udc_done
- */
-static void s3c2410_udc_done(struct s3c2410_ep *ep,
- struct s3c2410_request *req, int status)
-{
- unsigned halted = ep->halted;
-
- list_del_init(&req->queue);
-
- if (likely(req->req.status == -EINPROGRESS))
- req->req.status = status;
- else
- status = req->req.status;
-
- ep->halted = 1;
- usb_gadget_giveback_request(&ep->ep, &req->req);
- ep->halted = halted;
-}
-
-static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
- struct s3c2410_ep *ep, int status)
-{
- while (!list_empty(&ep->queue)) {
- struct s3c2410_request *req;
- req = list_entry(ep->queue.next, struct s3c2410_request,
- queue);
- s3c2410_udc_done(ep, req, status);
- }
-}
-
-static inline int s3c2410_udc_fifo_count_out(void)
-{
- int tmp;
-
- tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
- tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
- return tmp;
-}
-
-/*
- * s3c2410_udc_write_packet
- */
-static inline int s3c2410_udc_write_packet(int fifo,
- struct s3c2410_request *req,
- unsigned max)
-{
- unsigned len = min(req->req.length - req->req.actual, max);
- u8 *buf = req->req.buf + req->req.actual;
-
- prefetch(buf);
-
- dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
- req->req.actual, req->req.length, len, req->req.actual + len);
-
- req->req.actual += len;
-
- udelay(5);
- writesb(base_addr + fifo, buf, len);
- return len;
-}
-
-/*
- * s3c2410_udc_write_fifo
- *
- * return: 0 = still running, 1 = completed, negative = errno
- */
-static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
- struct s3c2410_request *req)
-{
- unsigned count;
- int is_last;
- u32 idx;
- int fifo_reg;
- u32 ep_csr;
-
- idx = ep->bEndpointAddress & 0x7F;
- switch (idx) {
- default:
- idx = 0;
- fallthrough;
- case 0:
- fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
- break;
- case 1:
- fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
- break;
- case 2:
- fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
- break;
- case 3:
- fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
- break;
- case 4:
- fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
- break;
- }
-
- count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
-
- /* last packet is often short (sometimes a zlp) */
- if (count != ep->ep.maxpacket)
- is_last = 1;
- else if (req->req.length != req->req.actual || req->req.zero)
- is_last = 0;
- else
- is_last = 2;
-
- /* Only ep0 debug messages are interesting */
- if (idx == 0)
- dprintk(DEBUG_NORMAL,
- "Written ep%d %d.%d of %d b [last %d,z %d]\n",
- idx, count, req->req.actual, req->req.length,
- is_last, req->req.zero);
-
- if (is_last) {
- /* The order is important. It prevents sending 2 packets
- * at the same time */
-
- if (idx == 0) {
- /* Reset signal => no need to say 'data sent' */
- if (!(udc_read(S3C2410_UDC_USB_INT_REG)
- & S3C2410_UDC_USBINT_RESET))
- s3c2410_udc_set_ep0_de_in(base_addr);
- ep->dev->ep0state = EP0_IDLE;
- } else {
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
- S3C2410_UDC_IN_CSR1_REG);
- }
-
- s3c2410_udc_done(ep, req, 0);
- is_last = 1;
- } else {
- if (idx == 0) {
- /* Reset signal => no need to say 'data sent' */
- if (!(udc_read(S3C2410_UDC_USB_INT_REG)
- & S3C2410_UDC_USBINT_RESET))
- s3c2410_udc_set_ep0_ipr(base_addr);
- } else {
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
- S3C2410_UDC_IN_CSR1_REG);
- }
- }
-
- return is_last;
-}
-
-static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
- struct s3c2410_request *req, unsigned avail)
-{
- unsigned len;
-
- len = min(req->req.length - req->req.actual, avail);
- req->req.actual += len;
-
- readsb(fifo + base_addr, buf, len);
- return len;
-}
-
-/*
- * return: 0 = still running, 1 = queue empty, negative = errno
- */
-static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
- struct s3c2410_request *req)
-{
- u8 *buf;
- u32 ep_csr;
- unsigned bufferspace;
- int is_last = 1;
- unsigned avail;
- int fifo_count = 0;
- u32 idx;
- int fifo_reg;
-
- idx = ep->bEndpointAddress & 0x7F;
-
- switch (idx) {
- default:
- idx = 0;
- fallthrough;
- case 0:
- fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
- break;
- case 1:
- fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
- break;
- case 2:
- fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
- break;
- case 3:
- fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
- break;
- case 4:
- fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
- break;
- }
-
- if (!req->req.length)
- return 1;
-
- buf = req->req.buf + req->req.actual;
- bufferspace = req->req.length - req->req.actual;
- if (!bufferspace) {
- dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
- return -1;
- }
-
- udc_write(idx, S3C2410_UDC_INDEX_REG);
-
- fifo_count = s3c2410_udc_fifo_count_out();
- dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
-
- if (fifo_count > ep->ep.maxpacket)
- avail = ep->ep.maxpacket;
- else
- avail = fifo_count;
-
- fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
-
- /* checking this with ep0 is not accurate as we already
- * read a control request
- **/
- if (idx != 0 && fifo_count < ep->ep.maxpacket) {
- is_last = 1;
- /* overflowed this request? flush extra data */
- if (fifo_count != avail)
- req->req.status = -EOVERFLOW;
- } else {
- is_last = (req->req.length <= req->req.actual) ? 1 : 0;
- }
-
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- fifo_count = s3c2410_udc_fifo_count_out();
-
- /* Only ep0 debug messages are interesting */
- if (idx == 0)
- dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
- __func__, fifo_count, is_last);
-
- if (is_last) {
- if (idx == 0) {
- s3c2410_udc_set_ep0_de_out(base_addr);
- ep->dev->ep0state = EP0_IDLE;
- } else {
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
- S3C2410_UDC_OUT_CSR1_REG);
- }
-
- s3c2410_udc_done(ep, req, 0);
- } else {
- if (idx == 0) {
- s3c2410_udc_clear_ep0_opr(base_addr);
- } else {
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
- S3C2410_UDC_OUT_CSR1_REG);
- }
- }
-
- return is_last;
-}
-
-static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
-{
- unsigned char *outbuf = (unsigned char *)crq;
- int bytes_read = 0;
-
- udc_write(0, S3C2410_UDC_INDEX_REG);
-
- bytes_read = s3c2410_udc_fifo_count_out();
-
- dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
-
- if (bytes_read > sizeof(struct usb_ctrlrequest))
- bytes_read = sizeof(struct usb_ctrlrequest);
-
- readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
-
- dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
- bytes_read, crq->bRequest, crq->bRequestType,
- crq->wValue, crq->wIndex, crq->wLength);
-
- return bytes_read;
-}
-
-static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
- struct usb_ctrlrequest *crq)
-{
- u16 status = 0;
- u8 ep_num = crq->wIndex & 0x7F;
- u8 is_in = crq->wIndex & USB_DIR_IN;
-
- switch (crq->bRequestType & USB_RECIP_MASK) {
- case USB_RECIP_INTERFACE:
- break;
-
- case USB_RECIP_DEVICE:
- status = dev->devstatus;
- break;
-
- case USB_RECIP_ENDPOINT:
- if (ep_num > 4 || crq->wLength > 2)
- return 1;
-
- if (ep_num == 0) {
- udc_write(0, S3C2410_UDC_INDEX_REG);
- status = udc_read(S3C2410_UDC_IN_CSR1_REG);
- status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
- } else {
- udc_write(ep_num, S3C2410_UDC_INDEX_REG);
- if (is_in) {
- status = udc_read(S3C2410_UDC_IN_CSR1_REG);
- status = status & S3C2410_UDC_ICSR1_SENDSTL;
- } else {
- status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
- status = status & S3C2410_UDC_OCSR1_SENDSTL;
- }
- }
-
- status = status ? 1 : 0;
- break;
-
- default:
- return 1;
- }
-
- /* Seems to be needed to get it working. ouch :( */
- udelay(5);
- udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
- udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
- s3c2410_udc_set_ep0_de_in(base_addr);
-
- return 0;
-}
-/*------------------------- usb state machine -------------------------------*/
-static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
-
-static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
- struct s3c2410_ep *ep,
- struct usb_ctrlrequest *crq,
- u32 ep0csr)
-{
- int len, ret, tmp;
-
- /* start control request? */
- if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
- return;
-
- s3c2410_udc_nuke(dev, ep, -EPROTO);
-
- len = s3c2410_udc_read_fifo_crq(crq);
- if (len != sizeof(*crq)) {
- dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
- " wanted %d bytes got %d. Stalling out...\n",
- sizeof(*crq), len);
- s3c2410_udc_set_ep0_ss(base_addr);
- return;
- }
-
- dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
- crq->bRequest, crq->bRequestType, crq->wLength);
-
- /* cope with automagic for some standard requests. */
- dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
- == USB_TYPE_STANDARD;
- dev->req_config = 0;
- dev->req_pending = 1;
-
- switch (crq->bRequest) {
- case USB_REQ_SET_CONFIGURATION:
- dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ...\n");
-
- if (crq->bRequestType == USB_RECIP_DEVICE) {
- dev->req_config = 1;
- s3c2410_udc_set_ep0_de_out(base_addr);
- }
- break;
-
- case USB_REQ_SET_INTERFACE:
- dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ...\n");
-
- if (crq->bRequestType == USB_RECIP_INTERFACE) {
- dev->req_config = 1;
- s3c2410_udc_set_ep0_de_out(base_addr);
- }
- break;
-
- case USB_REQ_SET_ADDRESS:
- dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ...\n");
-
- if (crq->bRequestType == USB_RECIP_DEVICE) {
- tmp = crq->wValue & 0x7F;
- dev->address = tmp;
- udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
- S3C2410_UDC_FUNC_ADDR_REG);
- s3c2410_udc_set_ep0_de_out(base_addr);
- return;
- }
- break;
-
- case USB_REQ_GET_STATUS:
- dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ...\n");
- s3c2410_udc_clear_ep0_opr(base_addr);
-
- if (dev->req_std) {
- if (!s3c2410_udc_get_status(dev, crq))
- return;
- }
- break;
-
- case USB_REQ_CLEAR_FEATURE:
- s3c2410_udc_clear_ep0_opr(base_addr);
-
- if (crq->bRequestType != USB_RECIP_ENDPOINT)
- break;
-
- if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
- break;
-
- s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
- s3c2410_udc_set_ep0_de_out(base_addr);
- return;
-
- case USB_REQ_SET_FEATURE:
- s3c2410_udc_clear_ep0_opr(base_addr);
-
- if (crq->bRequestType != USB_RECIP_ENDPOINT)
- break;
-
- if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
- break;
-
- s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
- s3c2410_udc_set_ep0_de_out(base_addr);
- return;
-
- default:
- s3c2410_udc_clear_ep0_opr(base_addr);
- break;
- }
-
- if (crq->bRequestType & USB_DIR_IN)
- dev->ep0state = EP0_IN_DATA_PHASE;
- else
- dev->ep0state = EP0_OUT_DATA_PHASE;
-
- if (!dev->driver)
- return;
-
- /* deliver the request to the gadget driver */
- ret = dev->driver->setup(&dev->gadget, crq);
- if (ret < 0) {
- if (dev->req_config) {
- dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
- crq->bRequest, ret);
- return;
- }
-
- if (ret == -EOPNOTSUPP)
- dprintk(DEBUG_NORMAL, "Operation not supported\n");
- else
- dprintk(DEBUG_NORMAL,
- "dev->driver->setup failed. (%d)\n", ret);
-
- udelay(5);
- s3c2410_udc_set_ep0_ss(base_addr);
- s3c2410_udc_set_ep0_de_out(base_addr);
- dev->ep0state = EP0_IDLE;
- /* deferred i/o == no response yet */
- } else if (dev->req_pending) {
- dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
- dev->req_pending = 0;
- }
-
- dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
-}
-
-static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
-{
- u32 ep0csr;
- struct s3c2410_ep *ep = &dev->ep[0];
- struct s3c2410_request *req;
- struct usb_ctrlrequest crq;
-
- if (list_empty(&ep->queue))
- req = NULL;
- else
- req = list_entry(ep->queue.next, struct s3c2410_request, queue);
-
- /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
- * S3C2410_UDC_EP0_CSR_REG when index is zero */
-
- udc_write(0, S3C2410_UDC_INDEX_REG);
- ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
-
- dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
- ep0csr, ep0states[dev->ep0state]);
-
- /* clear stall status */
- if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
- s3c2410_udc_nuke(dev, ep, -EPIPE);
- dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
- s3c2410_udc_clear_ep0_sst(base_addr);
- dev->ep0state = EP0_IDLE;
- return;
- }
-
- /* clear setup end */
- if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
- dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
- s3c2410_udc_nuke(dev, ep, 0);
- s3c2410_udc_clear_ep0_se(base_addr);
- dev->ep0state = EP0_IDLE;
- }
-
- switch (dev->ep0state) {
- case EP0_IDLE:
- s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
- break;
-
- case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
- dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
- if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req)
- s3c2410_udc_write_fifo(ep, req);
- break;
-
- case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */
- dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
- if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req)
- s3c2410_udc_read_fifo(ep, req);
- break;
-
- case EP0_END_XFER:
- dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
- dev->ep0state = EP0_IDLE;
- break;
-
- case EP0_STALL:
- dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
- dev->ep0state = EP0_IDLE;
- break;
- }
-}
-
-/*
- * handle_ep - Manage I/O endpoints
- */
-
-static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
-{
- struct s3c2410_request *req;
- int is_in = ep->bEndpointAddress & USB_DIR_IN;
- u32 ep_csr1;
- u32 idx;
-
- if (likely(!list_empty(&ep->queue)))
- req = list_entry(ep->queue.next,
- struct s3c2410_request, queue);
- else
- req = NULL;
-
- idx = ep->bEndpointAddress & 0x7F;
-
- if (is_in) {
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
- dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
- idx, ep_csr1, req ? 1 : 0);
-
- if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
- dprintk(DEBUG_VERBOSE, "st\n");
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
- S3C2410_UDC_IN_CSR1_REG);
- return;
- }
-
- if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req)
- s3c2410_udc_write_fifo(ep, req);
- } else {
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
- dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
-
- if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
- S3C2410_UDC_OUT_CSR1_REG);
- return;
- }
-
- if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req)
- s3c2410_udc_read_fifo(ep, req);
- }
-}
-
-/*
- * s3c2410_udc_irq - interrupt handler
- */
-static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
-{
- struct s3c2410_udc *dev = _dev;
- int usb_status;
- int usbd_status;
- int pwr_reg;
- int ep0csr;
- int i;
- u32 idx, idx2;
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
-
- /* Driver connected ? */
- if (!dev->driver) {
- /* Clear interrupts */
- udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
- S3C2410_UDC_USB_INT_REG);
- udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
- S3C2410_UDC_EP_INT_REG);
- }
-
- /* Save index */
- idx = udc_read(S3C2410_UDC_INDEX_REG);
-
- /* Read status registers */
- usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
- usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
- pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
-
- udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
- ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
-
- dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
- usb_status, usbd_status, pwr_reg, ep0csr);
-
- /*
- * Now, handle interrupts. There's two types :
- * - Reset, Resume, Suspend coming -> usb_int_reg
- * - EP -> ep_int_reg
- */
-
- /* RESET */
- if (usb_status & S3C2410_UDC_USBINT_RESET) {
- /* two kind of reset :
- * - reset start -> pwr reg = 8
- * - reset end -> pwr reg = 0
- **/
- dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
- ep0csr, pwr_reg);
-
- dev->gadget.speed = USB_SPEED_UNKNOWN;
- udc_write(0x00, S3C2410_UDC_INDEX_REG);
- udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
- S3C2410_UDC_MAXP_REG);
- dev->address = 0;
-
- dev->ep0state = EP0_IDLE;
- dev->gadget.speed = USB_SPEED_FULL;
-
- /* clear interrupt */
- udc_write(S3C2410_UDC_USBINT_RESET,
- S3C2410_UDC_USB_INT_REG);
-
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- spin_unlock_irqrestore(&dev->lock, flags);
- return IRQ_HANDLED;
- }
-
- /* RESUME */
- if (usb_status & S3C2410_UDC_USBINT_RESUME) {
- dprintk(DEBUG_NORMAL, "USB resume\n");
-
- /* clear interrupt */
- udc_write(S3C2410_UDC_USBINT_RESUME,
- S3C2410_UDC_USB_INT_REG);
-
- if (dev->gadget.speed != USB_SPEED_UNKNOWN
- && dev->driver
- && dev->driver->resume)
- dev->driver->resume(&dev->gadget);
- }
-
- /* SUSPEND */
- if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
- dprintk(DEBUG_NORMAL, "USB suspend\n");
-
- /* clear interrupt */
- udc_write(S3C2410_UDC_USBINT_SUSPEND,
- S3C2410_UDC_USB_INT_REG);
-
- if (dev->gadget.speed != USB_SPEED_UNKNOWN
- && dev->driver
- && dev->driver->suspend)
- dev->driver->suspend(&dev->gadget);
-
- dev->ep0state = EP0_IDLE;
- }
-
- /* EP */
- /* control traffic */
- /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
- * generate an interrupt
- */
- if (usbd_status & S3C2410_UDC_INT_EP0) {
- dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
- /* Clear the interrupt bit by setting it to 1 */
- udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
- s3c2410_udc_handle_ep0(dev);
- }
-
- /* endpoint data transfers */
- for (i = 1; i < S3C2410_ENDPOINTS; i++) {
- u32 tmp = 1 << i;
- if (usbd_status & tmp) {
- dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
-
- /* Clear the interrupt bit by setting it to 1 */
- udc_write(tmp, S3C2410_UDC_EP_INT_REG);
- s3c2410_udc_handle_ep(&dev->ep[i]);
- }
- }
-
- /* what else causes this interrupt? a receive! who is it? */
- if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
- for (i = 1; i < S3C2410_ENDPOINTS; i++) {
- idx2 = udc_read(S3C2410_UDC_INDEX_REG);
- udc_write(i, S3C2410_UDC_INDEX_REG);
-
- if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
- s3c2410_udc_handle_ep(&dev->ep[i]);
-
- /* restore index */
- udc_write(idx2, S3C2410_UDC_INDEX_REG);
- }
- }
-
- dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", irq_usbd);
-
- /* Restore old index */
- udc_write(idx, S3C2410_UDC_INDEX_REG);
-
- spin_unlock_irqrestore(&dev->lock, flags);
-
- return IRQ_HANDLED;
-}
-/*------------------------- s3c2410_ep_ops ----------------------------------*/
-
-static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
-{
- return container_of(ep, struct s3c2410_ep, ep);
-}
-
-static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
-{
- return container_of(gadget, struct s3c2410_udc, gadget);
-}
-
-static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
-{
- return container_of(req, struct s3c2410_request, req);
-}
-
-/*
- * s3c2410_udc_ep_enable
- */
-static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
- const struct usb_endpoint_descriptor *desc)
-{
- struct s3c2410_udc *dev;
- struct s3c2410_ep *ep;
- u32 max, tmp;
- unsigned long flags;
- u32 csr1, csr2;
- u32 int_en_reg;
-
- ep = to_s3c2410_ep(_ep);
-
- if (!_ep || !desc
- || _ep->name == ep0name
- || desc->bDescriptorType != USB_DT_ENDPOINT)
- return -EINVAL;
-
- dev = ep->dev;
- if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
- return -ESHUTDOWN;
-
- max = usb_endpoint_maxp(desc);
-
- local_irq_save(flags);
- _ep->maxpacket = max;
- ep->ep.desc = desc;
- ep->halted = 0;
- ep->bEndpointAddress = desc->bEndpointAddress;
-
- /* set max packet */
- udc_write(ep->num, S3C2410_UDC_INDEX_REG);
- udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
-
- /* set type, direction, address; reset fifo counters */
- if (desc->bEndpointAddress & USB_DIR_IN) {
- csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
- csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
-
- udc_write(ep->num, S3C2410_UDC_INDEX_REG);
- udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
- udc_write(ep->num, S3C2410_UDC_INDEX_REG);
- udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
- } else {
- /* don't flush in fifo or it will cause endpoint interrupt */
- csr1 = S3C2410_UDC_ICSR1_CLRDT;
- csr2 = S3C2410_UDC_ICSR2_DMAIEN;
-
- udc_write(ep->num, S3C2410_UDC_INDEX_REG);
- udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
- udc_write(ep->num, S3C2410_UDC_INDEX_REG);
- udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
-
- csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
- csr2 = S3C2410_UDC_OCSR2_DMAIEN;
-
- udc_write(ep->num, S3C2410_UDC_INDEX_REG);
- udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
- udc_write(ep->num, S3C2410_UDC_INDEX_REG);
- udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
- }
-
- /* enable irqs */
- int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
- udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
-
- /* print some debug message */
- tmp = desc->bEndpointAddress;
- dprintk(DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
- _ep->name, ep->num, tmp,
- desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
-
- local_irq_restore(flags);
- s3c2410_udc_set_halt(_ep, 0);
-
- return 0;
-}
-
-/*
- * s3c2410_udc_ep_disable
- */
-static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
-{
- struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
- unsigned long flags;
- u32 int_en_reg;
-
- if (!_ep || !ep->ep.desc) {
- dprintk(DEBUG_NORMAL, "%s not enabled\n",
- _ep ? ep->ep.name : NULL);
- return -EINVAL;
- }
-
- local_irq_save(flags);
-
- dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
-
- ep->ep.desc = NULL;
- ep->halted = 1;
-
- s3c2410_udc_nuke(ep->dev, ep, -ESHUTDOWN);
-
- /* disable irqs */
- int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
- udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
-
- local_irq_restore(flags);
-
- dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
-
- return 0;
-}
-
-/*
- * s3c2410_udc_alloc_request
- */
-static struct usb_request *
-s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
-{
- struct s3c2410_request *req;
-
- dprintk(DEBUG_VERBOSE, "%s(%p,%d)\n", __func__, _ep, mem_flags);
-
- if (!_ep)
- return NULL;
-
- req = kzalloc(sizeof(struct s3c2410_request), mem_flags);
- if (!req)
- return NULL;
-
- INIT_LIST_HEAD(&req->queue);
- return &req->req;
-}
-
-/*
- * s3c2410_udc_free_request
- */
-static void
-s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
-{
- struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
- struct s3c2410_request *req = to_s3c2410_req(_req);
-
- dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
-
- if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
- return;
-
- WARN_ON(!list_empty(&req->queue));
- kfree(req);
-}
-
-/*
- * s3c2410_udc_queue
- */
-static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
- gfp_t gfp_flags)
-{
- struct s3c2410_request *req = to_s3c2410_req(_req);
- struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
- struct s3c2410_udc *dev;
- u32 ep_csr = 0;
- int fifo_count = 0;
- unsigned long flags;
-
- if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
- dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
- return -EINVAL;
- }
-
- dev = ep->dev;
- if (unlikely(!dev->driver
- || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
- return -ESHUTDOWN;
- }
-
- local_irq_save(flags);
-
- if (unlikely(!_req || !_req->complete
- || !_req->buf || !list_empty(&req->queue))) {
- if (!_req)
- dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
- else {
- dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
- __func__, !_req->complete, !_req->buf,
- !list_empty(&req->queue));
- }
-
- local_irq_restore(flags);
- return -EINVAL;
- }
-
- _req->status = -EINPROGRESS;
- _req->actual = 0;
-
- dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
- __func__, ep->bEndpointAddress, _req->length);
-
- if (ep->bEndpointAddress) {
- udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
-
- ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
- ? S3C2410_UDC_IN_CSR1_REG
- : S3C2410_UDC_OUT_CSR1_REG);
- fifo_count = s3c2410_udc_fifo_count_out();
- } else {
- udc_write(0, S3C2410_UDC_INDEX_REG);
- ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
- fifo_count = s3c2410_udc_fifo_count_out();
- }
-
- /* kickstart this i/o queue? */
- if (list_empty(&ep->queue) && !ep->halted) {
- if (ep->bEndpointAddress == 0 /* ep0 */) {
- switch (dev->ep0state) {
- case EP0_IN_DATA_PHASE:
- if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
- && s3c2410_udc_write_fifo(ep,
- req)) {
- dev->ep0state = EP0_IDLE;
- req = NULL;
- }
- break;
-
- case EP0_OUT_DATA_PHASE:
- if ((!_req->length)
- || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
- && s3c2410_udc_read_fifo(ep,
- req))) {
- dev->ep0state = EP0_IDLE;
- req = NULL;
- }
- break;
-
- default:
- local_irq_restore(flags);
- return -EL2HLT;
- }
- } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
- && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
- && s3c2410_udc_write_fifo(ep, req)) {
- req = NULL;
- } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
- && fifo_count
- && s3c2410_udc_read_fifo(ep, req)) {
- req = NULL;
- }
- }
-
- /* pio or dma irq handler advances the queue. */
- if (likely(req))
- list_add_tail(&req->queue, &ep->queue);
-
- local_irq_restore(flags);
-
- dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
- return 0;
-}
-
-/*
- * s3c2410_udc_dequeue
- */
-static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
-{
- struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
- int retval = -EINVAL;
- unsigned long flags;
- struct s3c2410_request *req = NULL, *iter;
-
- dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
-
- if (!the_controller->driver)
- return -ESHUTDOWN;
-
- if (!_ep || !_req)
- return retval;
-
- local_irq_save(flags);
-
- list_for_each_entry(iter, &ep->queue, queue) {
- if (&iter->req != _req)
- continue;
- list_del_init(&iter->queue);
- _req->status = -ECONNRESET;
- req = iter;
- retval = 0;
- break;
- }
-
- if (retval == 0) {
- dprintk(DEBUG_VERBOSE,
- "dequeued req %p from %s, len %d buf %p\n",
- req, _ep->name, _req->length, _req->buf);
-
- s3c2410_udc_done(ep, req, -ECONNRESET);
- }
-
- local_irq_restore(flags);
- return retval;
-}
-
-/*
- * s3c2410_udc_set_halt
- */
-static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
-{
- struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
- u32 ep_csr = 0;
- unsigned long flags;
- u32 idx;
-
- if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
- dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
- return -EINVAL;
- }
-
- local_irq_save(flags);
-
- idx = ep->bEndpointAddress & 0x7F;
-
- if (idx == 0) {
- s3c2410_udc_set_ep0_ss(base_addr);
- s3c2410_udc_set_ep0_de_out(base_addr);
- } else {
- udc_write(idx, S3C2410_UDC_INDEX_REG);
- ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
- ? S3C2410_UDC_IN_CSR1_REG
- : S3C2410_UDC_OUT_CSR1_REG);
-
- if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
- if (value)
- udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
- S3C2410_UDC_IN_CSR1_REG);
- else {
- ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
- udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
- ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
- udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
- }
- } else {
- if (value)
- udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
- S3C2410_UDC_OUT_CSR1_REG);
- else {
- ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
- udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
- ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
- udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
- }
- }
- }
-
- ep->halted = value ? 1 : 0;
- local_irq_restore(flags);
-
- return 0;
-}
-
-static const struct usb_ep_ops s3c2410_ep_ops = {
- .enable = s3c2410_udc_ep_enable,
- .disable = s3c2410_udc_ep_disable,
-
- .alloc_request = s3c2410_udc_alloc_request,
- .free_request = s3c2410_udc_free_request,
-
- .queue = s3c2410_udc_queue,
- .dequeue = s3c2410_udc_dequeue,
-
- .set_halt = s3c2410_udc_set_halt,
-};
-
-/*------------------------- usb_gadget_ops ----------------------------------*/
-
-/*
- * s3c2410_udc_get_frame
- */
-static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
-{
- int tmp;
-
- dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
-
- tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
- tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
- return tmp;
-}
-
-/*
- * s3c2410_udc_wakeup
- */
-static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
-{
- dprintk(DEBUG_NORMAL, "%s()\n", __func__);
- return 0;
-}
-
-/*
- * s3c2410_udc_set_selfpowered
- */
-static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
-{
- struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
-
- dprintk(DEBUG_NORMAL, "%s()\n", __func__);
-
- gadget->is_selfpowered = (value != 0);
- if (value)
- udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
- else
- udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
-
- return 0;
-}
-
-static void s3c2410_udc_disable(struct s3c2410_udc *dev);
-static void s3c2410_udc_enable(struct s3c2410_udc *dev);
-
-static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
-{
- dprintk(DEBUG_NORMAL, "%s()\n", __func__);
-
- if (udc_info && (udc_info->udc_command || udc->pullup_gpiod)) {
-
- if (is_on)
- s3c2410_udc_enable(udc);
- else {
- if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
- if (udc->driver && udc->driver->disconnect)
- udc->driver->disconnect(&udc->gadget);
-
- }
- s3c2410_udc_disable(udc);
- }
- } else {
- return -EOPNOTSUPP;
- }
-
- return 0;
-}
-
-static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
-{
- struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
-
- dprintk(DEBUG_NORMAL, "%s()\n", __func__);
-
- udc->vbus = (is_active != 0);
- s3c2410_udc_set_pullup(udc, is_active);
- return 0;
-}
-
-static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
-{
- struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
-
- dprintk(DEBUG_NORMAL, "%s()\n", __func__);
-
- s3c2410_udc_set_pullup(udc, is_on);
- return 0;
-}
-
-static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
-{
- struct s3c2410_udc *dev = _dev;
- unsigned int value;
-
- dprintk(DEBUG_NORMAL, "%s()\n", __func__);
-
- value = gpiod_get_value(dev->vbus_gpiod);
-
- if (value != dev->vbus)
- s3c2410_udc_vbus_session(&dev->gadget, value);
-
- return IRQ_HANDLED;
-}
-
-static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
-{
- dprintk(DEBUG_NORMAL, "%s()\n", __func__);
-
- if (udc_info && udc_info->vbus_draw) {
- udc_info->vbus_draw(ma);
- return 0;
- }
-
- return -ENOTSUPP;
-}
-
-static int s3c2410_udc_start(struct usb_gadget *g,
- struct usb_gadget_driver *driver);
-static int s3c2410_udc_stop(struct usb_gadget *g);
-
-static const struct usb_gadget_ops s3c2410_ops = {
- .get_frame = s3c2410_udc_get_frame,
- .wakeup = s3c2410_udc_wakeup,
- .set_selfpowered = s3c2410_udc_set_selfpowered,
- .pullup = s3c2410_udc_pullup,
- .vbus_session = s3c2410_udc_vbus_session,
- .vbus_draw = s3c2410_vbus_draw,
- .udc_start = s3c2410_udc_start,
- .udc_stop = s3c2410_udc_stop,
-};
-
-static void s3c2410_udc_command(struct s3c2410_udc *udc,
- enum s3c2410_udc_cmd_e cmd)
-{
- if (!udc_info)
- return;
-
- if (udc_info->udc_command) {
- udc_info->udc_command(cmd);
- } else if (udc->pullup_gpiod) {
- int value;
-
- switch (cmd) {
- case S3C2410_UDC_P_ENABLE:
- value = 1;
- break;
- case S3C2410_UDC_P_DISABLE:
- value = 0;
- break;
- default:
- return;
- }
-
- gpiod_set_value(udc->pullup_gpiod, value);
- }
-}
-
-/*------------------------- gadget driver handling---------------------------*/
-/*
- * s3c2410_udc_disable
- */
-static void s3c2410_udc_disable(struct s3c2410_udc *dev)
-{
- dprintk(DEBUG_NORMAL, "%s()\n", __func__);
-
- /* Disable all interrupts */
- udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
- udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
-
- /* Clear the interrupt registers */
- udc_write(S3C2410_UDC_USBINT_RESET
- | S3C2410_UDC_USBINT_RESUME
- | S3C2410_UDC_USBINT_SUSPEND,
- S3C2410_UDC_USB_INT_REG);
-
- udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
-
- /* Good bye, cruel world */
- s3c2410_udc_command(dev, S3C2410_UDC_P_DISABLE);
-
- /* Set speed to unknown */
- dev->gadget.speed = USB_SPEED_UNKNOWN;
-}
-
-/*
- * s3c2410_udc_reinit
- */
-static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
-{
- u32 i;
-
- /* device/ep0 records init */
- INIT_LIST_HEAD(&dev->gadget.ep_list);
- INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
- dev->ep0state = EP0_IDLE;
-
- for (i = 0; i < S3C2410_ENDPOINTS; i++) {
- struct s3c2410_ep *ep = &dev->ep[i];
-
- if (i != 0)
- list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
-
- ep->dev = dev;
- ep->ep.desc = NULL;
- ep->halted = 0;
- INIT_LIST_HEAD(&ep->queue);
- usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket);
- }
-}
-
-/*
- * s3c2410_udc_enable
- */
-static void s3c2410_udc_enable(struct s3c2410_udc *dev)
-{
- int i;
-
- dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
-
- /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
- dev->gadget.speed = USB_SPEED_FULL;
-
- /* Set MAXP for all endpoints */
- for (i = 0; i < S3C2410_ENDPOINTS; i++) {
- udc_write(i, S3C2410_UDC_INDEX_REG);
- udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
- S3C2410_UDC_MAXP_REG);
- }
-
- /* Set default power state */
- udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
-
- /* Enable reset and suspend interrupt interrupts */
- udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
- S3C2410_UDC_USB_INT_EN_REG);
-
- /* Enable ep0 interrupt */
- udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
-
- /* time to say "hello, world" */
- s3c2410_udc_command(dev, S3C2410_UDC_P_ENABLE);
-}
-
-static int s3c2410_udc_start(struct usb_gadget *g,
- struct usb_gadget_driver *driver)
-{
- struct s3c2410_udc *udc = to_s3c2410(g);
-
- dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
-
- /* Hook the driver */
- udc->driver = driver;
-
- /* Enable udc */
- s3c2410_udc_enable(udc);
-
- return 0;
-}
-
-static int s3c2410_udc_stop(struct usb_gadget *g)
-{
- struct s3c2410_udc *udc = to_s3c2410(g);
-
- udc->driver = NULL;
-
- /* Disable udc */
- s3c2410_udc_disable(udc);
-
- return 0;
-}
-
-/*---------------------------------------------------------------------------*/
-static struct s3c2410_udc memory = {
- .gadget = {
- .ops = &s3c2410_ops,
- .ep0 = &memory.ep[0].ep,
- .name = gadget_name,
- .dev = {
- .init_name = "gadget",
- },
- },
-
- /* control endpoint */
- .ep[0] = {
- .num = 0,
- .ep = {
- .name = ep0name,
- .ops = &s3c2410_ep_ops,
- .maxpacket = EP0_FIFO_SIZE,
- .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
- USB_EP_CAPS_DIR_ALL),
- },
- .dev = &memory,
- },
-
- /* first group of endpoints */
- .ep[1] = {
- .num = 1,
- .ep = {
- .name = "ep1-bulk",
- .ops = &s3c2410_ep_ops,
- .maxpacket = EP_FIFO_SIZE,
- .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
- USB_EP_CAPS_DIR_ALL),
- },
- .dev = &memory,
- .fifo_size = EP_FIFO_SIZE,
- .bEndpointAddress = 1,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- },
- .ep[2] = {
- .num = 2,
- .ep = {
- .name = "ep2-bulk",
- .ops = &s3c2410_ep_ops,
- .maxpacket = EP_FIFO_SIZE,
- .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
- USB_EP_CAPS_DIR_ALL),
- },
- .dev = &memory,
- .fifo_size = EP_FIFO_SIZE,
- .bEndpointAddress = 2,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- },
- .ep[3] = {
- .num = 3,
- .ep = {
- .name = "ep3-bulk",
- .ops = &s3c2410_ep_ops,
- .maxpacket = EP_FIFO_SIZE,
- .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
- USB_EP_CAPS_DIR_ALL),
- },
- .dev = &memory,
- .fifo_size = EP_FIFO_SIZE,
- .bEndpointAddress = 3,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- },
- .ep[4] = {
- .num = 4,
- .ep = {
- .name = "ep4-bulk",
- .ops = &s3c2410_ep_ops,
- .maxpacket = EP_FIFO_SIZE,
- .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
- USB_EP_CAPS_DIR_ALL),
- },
- .dev = &memory,
- .fifo_size = EP_FIFO_SIZE,
- .bEndpointAddress = 4,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- }
-
-};
-
-/*
- * probe - binds to the platform device
- */
-static int s3c2410_udc_probe(struct platform_device *pdev)
-{
- struct s3c2410_udc *udc = &memory;
- struct device *dev = &pdev->dev;
- int retval;
- int irq;
-
- dev_dbg(dev, "%s()\n", __func__);
-
- usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
- if (IS_ERR(usb_bus_clock)) {
- dev_err(dev, "failed to get usb bus clock source\n");
- return PTR_ERR(usb_bus_clock);
- }
-
- clk_prepare_enable(usb_bus_clock);
-
- udc_clock = clk_get(NULL, "usb-device");
- if (IS_ERR(udc_clock)) {
- dev_err(dev, "failed to get udc clock source\n");
- retval = PTR_ERR(udc_clock);
- goto err_usb_bus_clk;
- }
-
- clk_prepare_enable(udc_clock);
-
- mdelay(10);
-
- dev_dbg(dev, "got and enabled clocks\n");
-
- if (strncmp(pdev->name, "s3c2440", 7) == 0) {
- dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
- memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
- memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
- memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
- memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
- }
-
- spin_lock_init(&udc->lock);
- udc_info = dev_get_platdata(&pdev->dev);
-
- base_addr = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(base_addr)) {
- retval = PTR_ERR(base_addr);
- goto err_udc_clk;
- }
-
- the_controller = udc;
- platform_set_drvdata(pdev, udc);
-
- s3c2410_udc_disable(udc);
- s3c2410_udc_reinit(udc);
-
- irq_usbd = platform_get_irq(pdev, 0);
- if (irq_usbd < 0) {
- retval = irq_usbd;
- goto err_udc_clk;
- }
-
- /* irq setup after old hardware state is cleaned up */
- retval = request_irq(irq_usbd, s3c2410_udc_irq,
- 0, gadget_name, udc);
-
- if (retval != 0) {
- dev_err(dev, "cannot get irq %i, err %d\n", irq_usbd, retval);
- retval = -EBUSY;
- goto err_udc_clk;
- }
-
- dev_dbg(dev, "got irq %i\n", irq_usbd);
-
- udc->vbus_gpiod = gpiod_get_optional(dev, "vbus", GPIOD_IN);
- if (IS_ERR(udc->vbus_gpiod)) {
- retval = PTR_ERR(udc->vbus_gpiod);
- goto err_int;
- }
- if (udc->vbus_gpiod) {
- gpiod_set_consumer_name(udc->vbus_gpiod, "udc vbus");
-
- irq = gpiod_to_irq(udc->vbus_gpiod);
- if (irq < 0) {
- dev_err(dev, "no irq for gpio vbus pin\n");
- retval = irq;
- goto err_gpio_claim;
- }
-
- retval = request_irq(irq, s3c2410_udc_vbus_irq,
- IRQF_TRIGGER_RISING
- | IRQF_TRIGGER_FALLING | IRQF_SHARED,
- gadget_name, udc);
-
- if (retval != 0) {
- dev_err(dev, "can't get vbus irq %d, err %d\n",
- irq, retval);
- retval = -EBUSY;
- goto err_gpio_claim;
- }
-
- dev_dbg(dev, "got irq %i\n", irq);
- } else {
- udc->vbus = 1;
- }
-
- udc->pullup_gpiod = gpiod_get_optional(dev, "pullup", GPIOD_OUT_LOW);
- if (IS_ERR(udc->pullup_gpiod)) {
- retval = PTR_ERR(udc->pullup_gpiod);
- goto err_vbus_irq;
- }
- gpiod_set_consumer_name(udc->pullup_gpiod, "udc pullup");
-
- retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
- if (retval)
- goto err_add_udc;
-
- debugfs_create_file("registers", S_IRUGO, s3c2410_udc_debugfs_root, udc,
- &s3c2410_udc_debugfs_fops);
-
- dev_dbg(dev, "probe ok\n");
-
- return 0;
-
-err_add_udc:
-err_vbus_irq:
- if (udc->vbus_gpiod)
- free_irq(gpiod_to_irq(udc->vbus_gpiod), udc);
-err_gpio_claim:
-err_int:
- free_irq(irq_usbd, udc);
-err_udc_clk:
- clk_disable_unprepare(udc_clock);
- clk_put(udc_clock);
- udc_clock = NULL;
-err_usb_bus_clk:
- clk_disable_unprepare(usb_bus_clock);
- clk_put(usb_bus_clock);
- usb_bus_clock = NULL;
-
- return retval;
-}
-
-/*
- * s3c2410_udc_remove
- */
-static int s3c2410_udc_remove(struct platform_device *pdev)
-{
- struct s3c2410_udc *udc = platform_get_drvdata(pdev);
-
- dev_dbg(&pdev->dev, "%s()\n", __func__);
-
- if (udc->driver)
- return -EBUSY;
-
- usb_del_gadget_udc(&udc->gadget);
- debugfs_remove(debugfs_lookup("registers", s3c2410_udc_debugfs_root));
-
- if (udc->vbus_gpiod)
- free_irq(gpiod_to_irq(udc->vbus_gpiod), udc);
-
- free_irq(irq_usbd, udc);
-
- if (!IS_ERR(udc_clock) && udc_clock != NULL) {
- clk_disable_unprepare(udc_clock);
- clk_put(udc_clock);
- udc_clock = NULL;
- }
-
- if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
- clk_disable_unprepare(usb_bus_clock);
- clk_put(usb_bus_clock);
- usb_bus_clock = NULL;
- }
-
- dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int
-s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
-{
- struct s3c2410_udc *udc = platform_get_drvdata(pdev);
-
- s3c2410_udc_command(udc, S3C2410_UDC_P_DISABLE);
-
- return 0;
-}
-
-static int s3c2410_udc_resume(struct platform_device *pdev)
-{
- struct s3c2410_udc *udc = platform_get_drvdata(pdev);
-
- s3c2410_udc_command(udc, S3C2410_UDC_P_ENABLE);
-
- return 0;
-}
-#else
-#define s3c2410_udc_suspend NULL
-#define s3c2410_udc_resume NULL
-#endif
-
-static const struct platform_device_id s3c_udc_ids[] = {
- { "s3c2410-usbgadget", },
- { "s3c2440-usbgadget", },
- { }
-};
-MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
-
-static struct platform_driver udc_driver_24x0 = {
- .driver = {
- .name = "s3c24x0-usbgadget",
- },
- .probe = s3c2410_udc_probe,
- .remove = s3c2410_udc_remove,
- .suspend = s3c2410_udc_suspend,
- .resume = s3c2410_udc_resume,
- .id_table = s3c_udc_ids,
-};
-
-static int __init udc_init(void)
-{
- int retval;
-
- dprintk(DEBUG_NORMAL, "%s\n", gadget_name);
-
- s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name,
- usb_debug_root);
-
- retval = platform_driver_register(&udc_driver_24x0);
- if (retval)
- goto err;
-
- return 0;
-
-err:
- debugfs_remove(s3c2410_udc_debugfs_root);
- return retval;
-}
-
-static void __exit udc_exit(void)
-{
- platform_driver_unregister(&udc_driver_24x0);
- debugfs_remove_recursive(s3c2410_udc_debugfs_root);
-}
-
-module_init(udc_init);
-module_exit(udc_exit);
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
projects / platform / kernel / linux-rpi.git / commitdiff