+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Based on drivers/usb/gadget/omap1510_udc.c
- * TI OMAP1510 USB bus interface driver
- *
- * (C) Copyright 2009
- * Vipin Kumar, STMicroelectronics, vipin.kumar@st.com.
- */
-
-#include <common.h>
-#include <serial.h>
-#include <asm/io.h>
-#include <linux/delay.h>
-
-#include <env.h>
-#include <usbdevice.h>
-#include "ep0.h"
-#include <usb/designware_udc.h>
-#include <usb/udc.h>
-#include <asm/arch/hardware.h>
-
-#define UDC_INIT_MDELAY 80 /* Device settle delay */
-
-/* Some kind of debugging output... */
-#ifndef DEBUG_DWUSBTTY
-#define UDCDBG(str)
-#define UDCDBGA(fmt, args...)
-#else
-#define UDCDBG(str) serial_printf(str "\n")
-#define UDCDBGA(fmt, args...) serial_printf(fmt "\n", ##args)
-#endif
-
-static struct urb *ep0_urb;
-static struct usb_device_instance *udc_device;
-
-static struct plug_regs *const plug_regs_p =
- (struct plug_regs * const)CONFIG_SYS_PLUG_BASE;
-static struct udc_regs *const udc_regs_p =
- (struct udc_regs * const)CONFIG_SYS_USBD_BASE;
-static struct udc_endp_regs *const outep_regs_p =
- &((struct udc_regs * const)CONFIG_SYS_USBD_BASE)->out_regs[0];
-static struct udc_endp_regs *const inep_regs_p =
- &((struct udc_regs * const)CONFIG_SYS_USBD_BASE)->in_regs[0];
-
-/*
- * udc_state_transition - Write the next packet to TxFIFO.
- * @initial: Initial state.
- * @final: Final state.
- *
- * Helper function to implement device state changes. The device states and
- * the events that transition between them are:
- *
- * STATE_ATTACHED
- * || /\
- * \/ ||
- * DEVICE_HUB_CONFIGURED DEVICE_HUB_RESET
- * || /\
- * \/ ||
- * STATE_POWERED
- * || /\
- * \/ ||
- * DEVICE_RESET DEVICE_POWER_INTERRUPTION
- * || /\
- * \/ ||
- * STATE_DEFAULT
- * || /\
- * \/ ||
- * DEVICE_ADDRESS_ASSIGNED DEVICE_RESET
- * || /\
- * \/ ||
- * STATE_ADDRESSED
- * || /\
- * \/ ||
- * DEVICE_CONFIGURED DEVICE_DE_CONFIGURED
- * || /\
- * \/ ||
- * STATE_CONFIGURED
- *
- * udc_state_transition transitions up (in the direction from STATE_ATTACHED
- * to STATE_CONFIGURED) from the specified initial state to the specified final
- * state, passing through each intermediate state on the way. If the initial
- * state is at or above (i.e. nearer to STATE_CONFIGURED) the final state, then
- * no state transitions will take place.
- *
- * udc_state_transition also transitions down (in the direction from
- * STATE_CONFIGURED to STATE_ATTACHED) from the specified initial state to the
- * specified final state, passing through each intermediate state on the way.
- * If the initial state is at or below (i.e. nearer to STATE_ATTACHED) the final
- * state, then no state transitions will take place.
- *
- * This function must only be called with interrupts disabled.
- */
-static void udc_state_transition(usb_device_state_t initial,
- usb_device_state_t final)
-{
- if (initial < final) {
- switch (initial) {
- case STATE_ATTACHED:
- usbd_device_event_irq(udc_device,
- DEVICE_HUB_CONFIGURED, 0);
- if (final == STATE_POWERED)
- break;
- case STATE_POWERED:
- usbd_device_event_irq(udc_device, DEVICE_RESET, 0);
- if (final == STATE_DEFAULT)
- break;
- case STATE_DEFAULT:
- usbd_device_event_irq(udc_device,
- DEVICE_ADDRESS_ASSIGNED, 0);
- if (final == STATE_ADDRESSED)
- break;
- case STATE_ADDRESSED:
- usbd_device_event_irq(udc_device, DEVICE_CONFIGURED, 0);
- case STATE_CONFIGURED:
- break;
- default:
- break;
- }
- } else if (initial > final) {
- switch (initial) {
- case STATE_CONFIGURED:
- usbd_device_event_irq(udc_device,
- DEVICE_DE_CONFIGURED, 0);
- if (final == STATE_ADDRESSED)
- break;
- case STATE_ADDRESSED:
- usbd_device_event_irq(udc_device, DEVICE_RESET, 0);
- if (final == STATE_DEFAULT)
- break;
- case STATE_DEFAULT:
- usbd_device_event_irq(udc_device,
- DEVICE_POWER_INTERRUPTION, 0);
- if (final == STATE_POWERED)
- break;
- case STATE_POWERED:
- usbd_device_event_irq(udc_device, DEVICE_HUB_RESET, 0);
- case STATE_ATTACHED:
- break;
- default:
- break;
- }
- }
-}
-
-/* Stall endpoint */
-static void udc_stall_ep(u32 ep_num)
-{
- writel(readl(&inep_regs_p[ep_num].endp_cntl) | ENDP_CNTL_STALL,
- &inep_regs_p[ep_num].endp_cntl);
-
- writel(readl(&outep_regs_p[ep_num].endp_cntl) | ENDP_CNTL_STALL,
- &outep_regs_p[ep_num].endp_cntl);
-}
-
-static void *get_fifo(int ep_num, int in)
-{
- u32 *fifo_ptr = (u32 *)CONFIG_SYS_FIFO_BASE;
-
- switch (ep_num) {
- case UDC_EP3:
- fifo_ptr += readl(&inep_regs_p[1].endp_bsorfn);
- /* break intentionally left out */
-
- case UDC_EP1:
- fifo_ptr += readl(&inep_regs_p[0].endp_bsorfn);
- /* break intentionally left out */
-
- case UDC_EP0:
- default:
- if (in) {
- fifo_ptr +=
- readl(&outep_regs_p[2].endp_maxpacksize) >> 16;
- /* break intentionally left out */
- } else {
- break;
- }
-
- case UDC_EP2:
- fifo_ptr += readl(&outep_regs_p[0].endp_maxpacksize) >> 16;
- /* break intentionally left out */
- }
-
- return (void *)fifo_ptr;
-}
-
-static int usbgetpckfromfifo(int epNum, u8 *bufp, u32 len)
-{
- u8 *fifo_ptr = (u8 *)get_fifo(epNum, 0);
- u32 i, nw, nb;
- u32 *wrdp;
- u8 *bytp;
- u32 tmp[128];
-
- if (readl(&udc_regs_p->dev_stat) & DEV_STAT_RXFIFO_EMPTY)
- return -1;
-
- nw = len / sizeof(u32);
- nb = len % sizeof(u32);
-
- /* use tmp buf if bufp is not word aligned */
- if ((int)bufp & 0x3)
- wrdp = (u32 *)&tmp[0];
- else
- wrdp = (u32 *)bufp;
-
- for (i = 0; i < nw; i++) {
- writel(readl(fifo_ptr), wrdp);
- wrdp++;
- }
-
- bytp = (u8 *)wrdp;
- for (i = 0; i < nb; i++) {
- writeb(readb(fifo_ptr), bytp);
- fifo_ptr++;
- bytp++;
- }
- readl(&outep_regs_p[epNum].write_done);
-
- /* copy back tmp buffer to bufp if bufp is not word aligned */
- if ((int)bufp & 0x3)
- memcpy(bufp, tmp, len);
-
- return 0;
-}
-
-static void usbputpcktofifo(int epNum, u8 *bufp, u32 len)
-{
- u32 i, nw, nb;
- u32 *wrdp;
- u8 *bytp;
- u8 *fifo_ptr = get_fifo(epNum, 1);
-
- nw = len / sizeof(int);
- nb = len % sizeof(int);
- wrdp = (u32 *)bufp;
- for (i = 0; i < nw; i++) {
- writel(*wrdp, fifo_ptr);
- wrdp++;
- }
-
- bytp = (u8 *)wrdp;
- for (i = 0; i < nb; i++) {
- writeb(*bytp, fifo_ptr);
- fifo_ptr++;
- bytp++;
- }
-}
-
-/*
- * dw_write_noniso_tx_fifo - Write the next packet to TxFIFO.
- * @endpoint: Endpoint pointer.
- *
- * If the endpoint has an active tx_urb, then the next packet of data from the
- * URB is written to the tx FIFO. The total amount of data in the urb is given
- * by urb->actual_length. The maximum amount of data that can be sent in any
- * one packet is given by endpoint->tx_packetSize. The number of data bytes
- * from this URB that have already been transmitted is given by endpoint->sent.
- * endpoint->last is updated by this routine with the number of data bytes
- * transmitted in this packet.
- *
- */
-static void dw_write_noniso_tx_fifo(struct usb_endpoint_instance
- *endpoint)
-{
- struct urb *urb = endpoint->tx_urb;
- int align;
-
- if (urb) {
- u32 last;
-
- UDCDBGA("urb->buffer %p, buffer_length %d, actual_length %d",
- urb->buffer, urb->buffer_length, urb->actual_length);
-
- last = min_t(u32, urb->actual_length - endpoint->sent,
- endpoint->tx_packetSize);
-
- if (last) {
- u8 *cp = urb->buffer + endpoint->sent;
-
- /*
- * This ensures that USBD packet fifo is accessed
- * - through word aligned pointer or
- * - through non word aligned pointer but only
- * with a max length to make the next packet
- * word aligned
- */
-
- align = ((ulong)cp % sizeof(int));
- if (align)
- last = min(last, sizeof(int) - align);
-
- UDCDBGA("endpoint->sent %d, tx_packetSize %d, last %d",
- endpoint->sent, endpoint->tx_packetSize, last);
-
- usbputpcktofifo(endpoint->endpoint_address &
- USB_ENDPOINT_NUMBER_MASK, cp, last);
- }
- endpoint->last = last;
- }
-}
-
-/*
- * Handle SETUP USB interrupt.
- * This function implements TRM Figure 14-14.
- */
-static void dw_udc_setup(struct usb_endpoint_instance *endpoint)
-{
- u8 *datap = (u8 *)&ep0_urb->device_request;
- int ep_addr = endpoint->endpoint_address;
-
- UDCDBG("-> Entering device setup");
- usbgetpckfromfifo(ep_addr, datap, 8);
-
- /* Try to process setup packet */
- if (ep0_recv_setup(ep0_urb)) {
- /* Not a setup packet, stall next EP0 transaction */
- udc_stall_ep(0);
- UDCDBG("can't parse setup packet, still waiting for setup");
- return;
- }
-
- /* Check direction */
- if ((ep0_urb->device_request.bmRequestType & USB_REQ_DIRECTION_MASK)
- == USB_REQ_HOST2DEVICE) {
- UDCDBG("control write on EP0");
- if (le16_to_cpu(ep0_urb->device_request.wLength)) {
- /* Stall this request */
- UDCDBG("Stalling unsupported EP0 control write data "
- "stage.");
- udc_stall_ep(0);
- }
- } else {
-
- UDCDBG("control read on EP0");
- /*
- * The ep0_recv_setup function has already placed our response
- * packet data in ep0_urb->buffer and the packet length in
- * ep0_urb->actual_length.
- */
- endpoint->tx_urb = ep0_urb;
- endpoint->sent = 0;
- /*
- * Write packet data to the FIFO. dw_write_noniso_tx_fifo
- * will update endpoint->last with the number of bytes written
- * to the FIFO.
- */
- dw_write_noniso_tx_fifo(endpoint);
-
- writel(0x0, &inep_regs_p[ep_addr].write_done);
- }
-
- udc_unset_nak(endpoint->endpoint_address);
-
- UDCDBG("<- Leaving device setup");
-}
-
-/*
- * Handle endpoint 0 RX interrupt
- */
-static void dw_udc_ep0_rx(struct usb_endpoint_instance *endpoint)
-{
- u8 dummy[64];
-
- UDCDBG("RX on EP0");
-
- /* Check direction */
- if ((ep0_urb->device_request.bmRequestType
- & USB_REQ_DIRECTION_MASK) == USB_REQ_HOST2DEVICE) {
- /*
- * This rx interrupt must be for a control write data
- * stage packet.
- *
- * We don't support control write data stages.
- * We should never end up here.
- */
-
- UDCDBG("Stalling unexpected EP0 control write "
- "data stage packet");
- udc_stall_ep(0);
- } else {
- /*
- * This rx interrupt must be for a control read status
- * stage packet.
- */
- UDCDBG("ACK on EP0 control read status stage packet");
- u32 len = (readl(&outep_regs_p[0].endp_status) >> 11) & 0xfff;
- usbgetpckfromfifo(0, dummy, len);
- }
-}
-
-/*
- * Handle endpoint 0 TX interrupt
- */
-static void dw_udc_ep0_tx(struct usb_endpoint_instance *endpoint)
-{
- struct usb_device_request *request = &ep0_urb->device_request;
- int ep_addr;
-
- UDCDBG("TX on EP0");
-
- /* Check direction */
- if ((request->bmRequestType & USB_REQ_DIRECTION_MASK) ==
- USB_REQ_HOST2DEVICE) {
- /*
- * This tx interrupt must be for a control write status
- * stage packet.
- */
- UDCDBG("ACK on EP0 control write status stage packet");
- } else {
- /*
- * This tx interrupt must be for a control read data
- * stage packet.
- */
- int wLength = le16_to_cpu(request->wLength);
-
- /*
- * Update our count of bytes sent so far in this
- * transfer.
- */
- endpoint->sent += endpoint->last;
-
- /*
- * We are finished with this transfer if we have sent
- * all of the bytes in our tx urb (urb->actual_length)
- * unless we need a zero-length terminating packet. We
- * need a zero-length terminating packet if we returned
- * fewer bytes than were requested (wLength) by the host,
- * and the number of bytes we returned is an exact
- * multiple of the packet size endpoint->tx_packetSize.
- */
- if ((endpoint->sent == ep0_urb->actual_length) &&
- ((ep0_urb->actual_length == wLength) ||
- (endpoint->last != endpoint->tx_packetSize))) {
- /* Done with control read data stage. */
- UDCDBG("control read data stage complete");
- } else {
- /*
- * We still have another packet of data to send
- * in this control read data stage or else we
- * need a zero-length terminating packet.
- */
- UDCDBG("ACK control read data stage packet");
- dw_write_noniso_tx_fifo(endpoint);
-
- ep_addr = endpoint->endpoint_address;
- writel(0x0, &inep_regs_p[ep_addr].write_done);
- }
- }
-}
-
-static struct usb_endpoint_instance *dw_find_ep(int ep)
-{
- int i;
-
- for (i = 0; i < udc_device->bus->max_endpoints; i++) {
- if ((udc_device->bus->endpoint_array[i].endpoint_address &
- USB_ENDPOINT_NUMBER_MASK) == ep)
- return &udc_device->bus->endpoint_array[i];
- }
- return NULL;
-}
-
-/*
- * Handle RX transaction on non-ISO endpoint.
- * The ep argument is a physical endpoint number for a non-ISO IN endpoint
- * in the range 1 to 15.
- */
-static void dw_udc_epn_rx(int ep)
-{
- int nbytes = 0;
- struct urb *urb;
- struct usb_endpoint_instance *endpoint = dw_find_ep(ep);
-
- if (endpoint) {
- urb = endpoint->rcv_urb;
-
- if (urb) {
- u8 *cp = urb->buffer + urb->actual_length;
-
- nbytes = (readl(&outep_regs_p[ep].endp_status) >> 11) &
- 0xfff;
- usbgetpckfromfifo(ep, cp, nbytes);
- usbd_rcv_complete(endpoint, nbytes, 0);
- }
- }
-}
-
-/*
- * Handle TX transaction on non-ISO endpoint.
- * The ep argument is a physical endpoint number for a non-ISO IN endpoint
- * in the range 16 to 30.
- */
-static void dw_udc_epn_tx(int ep)
-{
- struct usb_endpoint_instance *endpoint = dw_find_ep(ep);
-
- if (!endpoint)
- return;
-
- /*
- * We need to transmit a terminating zero-length packet now if
- * we have sent all of the data in this URB and the transfer
- * size was an exact multiple of the packet size.
- */
- if (endpoint->tx_urb &&
- (endpoint->last == endpoint->tx_packetSize) &&
- (endpoint->tx_urb->actual_length - endpoint->sent -
- endpoint->last == 0)) {
- /* handle zero length packet here */
- writel(0x0, &inep_regs_p[ep].write_done);
-
- }
-
- if (endpoint->tx_urb && endpoint->tx_urb->actual_length) {
- /* retire the data that was just sent */
- usbd_tx_complete(endpoint);
- /*
- * Check to see if we have more data ready to transmit
- * now.
- */
- if (endpoint->tx_urb && endpoint->tx_urb->actual_length) {
- /* write data to FIFO */
- dw_write_noniso_tx_fifo(endpoint);
- writel(0x0, &inep_regs_p[ep].write_done);
-
- } else if (endpoint->tx_urb
- && (endpoint->tx_urb->actual_length == 0)) {
- /* udc_set_nak(ep); */
- }
- }
-}
-
-/*
- * Start of public functions.
- */
-
-/* Called to start packet transmission. */
-int udc_endpoint_write(struct usb_endpoint_instance *endpoint)
-{
- udc_unset_nak(endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK);
- return 0;
-}
-
-/* Start to initialize h/w stuff */
-int udc_init(void)
-{
- int i;
- u32 plug_st;
-
- udc_device = NULL;
-
- UDCDBG("starting");
-
- readl(&plug_regs_p->plug_pending);
-
- for (i = 0; i < UDC_INIT_MDELAY; i++)
- udelay(1000);
-
- plug_st = readl(&plug_regs_p->plug_state);
- writel(plug_st | PLUG_STATUS_EN, &plug_regs_p->plug_state);
-
- writel(~0x0, &udc_regs_p->endp_int);
- writel(~0x0, &udc_regs_p->dev_int_mask);
- writel(~0x0, &udc_regs_p->endp_int_mask);
-
-#ifndef CONFIG_USBD_HS
- writel(DEV_CONF_FS_SPEED | DEV_CONF_REMWAKEUP | DEV_CONF_SELFPOW |
- DEV_CONF_PHYINT_16, &udc_regs_p->dev_conf);
-#else
- writel(DEV_CONF_HS_SPEED | DEV_CONF_REMWAKEUP | DEV_CONF_SELFPOW |
- DEV_CONF_PHYINT_16, &udc_regs_p->dev_conf);
-#endif
-
- writel(DEV_CNTL_SOFTDISCONNECT, &udc_regs_p->dev_cntl);
-
- /* Clear all interrupts pending */
- writel(DEV_INT_MSK, &udc_regs_p->dev_int);
-
- return 0;
-}
-
-int is_usbd_high_speed(void)
-{
- return (readl(&udc_regs_p->dev_stat) & DEV_STAT_ENUM) ? 0 : 1;
-}
-
-/*
- * udc_setup_ep - setup endpoint
- * Associate a physical endpoint with endpoint_instance
- */
-void udc_setup_ep(struct usb_device_instance *device,
- u32 ep, struct usb_endpoint_instance *endpoint)
-{
- UDCDBGA("setting up endpoint addr %x", endpoint->endpoint_address);
- int ep_addr;
- int ep_num, ep_type;
- int packet_size;
- int buffer_size;
- int attributes;
- char *tt;
- u32 endp_intmask;
-
- if ((ep != 0) && (udc_device->device_state < STATE_ADDRESSED))
- return;
-
- tt = env_get("usbtty");
- if (!tt)
- tt = "generic";
-
- ep_addr = endpoint->endpoint_address;
- ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
-
- if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
- /* IN endpoint */
- packet_size = endpoint->tx_packetSize;
- buffer_size = packet_size * 2;
- attributes = endpoint->tx_attributes;
- } else {
- /* OUT endpoint */
- packet_size = endpoint->rcv_packetSize;
- buffer_size = packet_size * 2;
- attributes = endpoint->rcv_attributes;
- }
-
- switch (attributes & USB_ENDPOINT_XFERTYPE_MASK) {
- case USB_ENDPOINT_XFER_CONTROL:
- ep_type = ENDP_EPTYPE_CNTL;
- break;
- case USB_ENDPOINT_XFER_BULK:
- default:
- ep_type = ENDP_EPTYPE_BULK;
- break;
- case USB_ENDPOINT_XFER_INT:
- ep_type = ENDP_EPTYPE_INT;
- break;
- case USB_ENDPOINT_XFER_ISOC:
- ep_type = ENDP_EPTYPE_ISO;
- break;
- }
-
- struct udc_endp_regs *out_p = &outep_regs_p[ep_num];
- struct udc_endp_regs *in_p = &inep_regs_p[ep_num];
-
- if (!ep_addr) {
- /* Setup endpoint 0 */
- buffer_size = packet_size;
-
- writel(readl(&in_p->endp_cntl) | ENDP_CNTL_CNAK,
- &in_p->endp_cntl);
-
- writel(readl(&out_p->endp_cntl) | ENDP_CNTL_CNAK,
- &out_p->endp_cntl);
-
- writel(ENDP_CNTL_CONTROL | ENDP_CNTL_FLUSH, &in_p->endp_cntl);
-
- writel(buffer_size / sizeof(int), &in_p->endp_bsorfn);
-
- writel(packet_size, &in_p->endp_maxpacksize);
-
- writel(ENDP_CNTL_CONTROL | ENDP_CNTL_RRDY, &out_p->endp_cntl);
-
- writel(packet_size | ((buffer_size / sizeof(int)) << 16),
- &out_p->endp_maxpacksize);
-
- } else if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
- /* Setup the IN endpoint */
- writel(0x0, &in_p->endp_status);
- writel((ep_type << 4) | ENDP_CNTL_RRDY, &in_p->endp_cntl);
- writel(buffer_size / sizeof(int), &in_p->endp_bsorfn);
- writel(packet_size, &in_p->endp_maxpacksize);
-
- if (!strcmp(tt, "cdc_acm")) {
- if (ep_type == ENDP_EPTYPE_INT) {
- /* Conf no. 1 Interface no. 0 */
- writel((packet_size << 19) |
- ENDP_EPDIR_IN | (1 << 7) |
- (0 << 11) | (ep_type << 5) | ep_num,
- &udc_regs_p->udc_endp_reg[ep_num]);
- } else {
- /* Conf no. 1 Interface no. 1 */
- writel((packet_size << 19) |
- ENDP_EPDIR_IN | (1 << 7) |
- (1 << 11) | (ep_type << 5) | ep_num,
- &udc_regs_p->udc_endp_reg[ep_num]);
- }
- } else {
- /* Conf no. 1 Interface no. 0 */
- writel((packet_size << 19) |
- ENDP_EPDIR_IN | (1 << 7) |
- (0 << 11) | (ep_type << 5) | ep_num,
- &udc_regs_p->udc_endp_reg[ep_num]);
- }
-
- } else {
- /* Setup the OUT endpoint */
- writel(0x0, &out_p->endp_status);
- writel((ep_type << 4) | ENDP_CNTL_RRDY, &out_p->endp_cntl);
- writel(packet_size | ((buffer_size / sizeof(int)) << 16),
- &out_p->endp_maxpacksize);
-
- if (!strcmp(tt, "cdc_acm")) {
- writel((packet_size << 19) |
- ENDP_EPDIR_OUT | (1 << 7) |
- (1 << 11) | (ep_type << 5) | ep_num,
- &udc_regs_p->udc_endp_reg[ep_num]);
- } else {
- writel((packet_size << 19) |
- ENDP_EPDIR_OUT | (1 << 7) |
- (0 << 11) | (ep_type << 5) | ep_num,
- &udc_regs_p->udc_endp_reg[ep_num]);
- }
-
- }
-
- endp_intmask = readl(&udc_regs_p->endp_int_mask);
- endp_intmask &= ~((1 << ep_num) | 0x10000 << ep_num);
- writel(endp_intmask, &udc_regs_p->endp_int_mask);
-}
-
-/* Turn on the USB connection by enabling the pullup resistor */
-void udc_connect(void)
-{
- u32 plug_st, dev_cntl;
-
- dev_cntl = readl(&udc_regs_p->dev_cntl);
- dev_cntl |= DEV_CNTL_SOFTDISCONNECT;
- writel(dev_cntl, &udc_regs_p->dev_cntl);
-
- udelay(1000);
-
- dev_cntl = readl(&udc_regs_p->dev_cntl);
- dev_cntl &= ~DEV_CNTL_SOFTDISCONNECT;
- writel(dev_cntl, &udc_regs_p->dev_cntl);
-
- plug_st = readl(&plug_regs_p->plug_state);
- plug_st &= ~(PLUG_STATUS_PHY_RESET | PLUG_STATUS_PHY_MODE);
- writel(plug_st, &plug_regs_p->plug_state);
-}
-
-/* Turn off the USB connection by disabling the pullup resistor */
-void udc_disconnect(void)
-{
- u32 plug_st;
-
- writel(DEV_CNTL_SOFTDISCONNECT, &udc_regs_p->dev_cntl);
-
- plug_st = readl(&plug_regs_p->plug_state);
- plug_st |= (PLUG_STATUS_PHY_RESET | PLUG_STATUS_PHY_MODE);
- writel(plug_st, &plug_regs_p->plug_state);
-}
-
-/* Switch on the UDC */
-void udc_enable(struct usb_device_instance *device)
-{
- UDCDBGA("enable device %p, status %d", device, device->status);
-
- /* Save the device structure pointer */
- udc_device = device;
-
- /* Setup ep0 urb */
- if (!ep0_urb) {
- ep0_urb =
- usbd_alloc_urb(udc_device, udc_device->bus->endpoint_array);
- } else {
- serial_printf("udc_enable: ep0_urb already allocated %p\n",
- ep0_urb);
- }
-
- writel(DEV_INT_SOF, &udc_regs_p->dev_int_mask);
-}
-
-/**
- * udc_startup - allow udc code to do any additional startup
- */
-void udc_startup_events(struct usb_device_instance *device)
-{
- /* The DEVICE_INIT event puts the USB device in the state STATE_INIT. */
- usbd_device_event_irq(device, DEVICE_INIT, 0);
-
- /*
- * The DEVICE_CREATE event puts the USB device in the state
- * STATE_ATTACHED.
- */
- usbd_device_event_irq(device, DEVICE_CREATE, 0);
-
- /*
- * Some USB controller driver implementations signal
- * DEVICE_HUB_CONFIGURED and DEVICE_RESET events here.
- * DEVICE_HUB_CONFIGURED causes a transition to the state STATE_POWERED,
- * and DEVICE_RESET causes a transition to the state STATE_DEFAULT.
- * The DW USB client controller has the capability to detect when the
- * USB cable is connected to a powered USB bus, so we will defer the
- * DEVICE_HUB_CONFIGURED and DEVICE_RESET events until later.
- */
-
- udc_enable(device);
-}
-
-/*
- * Plug detection interrupt handling
- */
-static void dw_udc_plug_irq(void)
-{
- if (readl(&plug_regs_p->plug_state) & PLUG_STATUS_ATTACHED) {
- /*
- * USB cable attached
- * Turn off PHY reset bit (PLUG detect).
- * Switch PHY opmode to normal operation (PLUG detect).
- */
- udc_connect();
- writel(DEV_INT_SOF, &udc_regs_p->dev_int_mask);
-
- UDCDBG("device attached and powered");
- udc_state_transition(udc_device->device_state, STATE_POWERED);
- } else {
- writel(~0x0, &udc_regs_p->dev_int_mask);
-
- UDCDBG("device detached or unpowered");
- udc_state_transition(udc_device->device_state, STATE_ATTACHED);
- }
-}
-
-/*
- * Device interrupt handling
- */
-static void dw_udc_dev_irq(void)
-{
- if (readl(&udc_regs_p->dev_int) & DEV_INT_USBRESET) {
- writel(~0x0, &udc_regs_p->endp_int_mask);
-
- writel(readl(&inep_regs_p[0].endp_cntl) | ENDP_CNTL_FLUSH,
- &inep_regs_p[0].endp_cntl);
-
- writel(DEV_INT_USBRESET, &udc_regs_p->dev_int);
-
- /*
- * This endpoint0 specific register can be programmed only
- * after the phy clock is initialized
- */
- writel((EP0_MAX_PACKET_SIZE << 19) | ENDP_EPTYPE_CNTL,
- &udc_regs_p->udc_endp_reg[0]);
-
- UDCDBG("device reset in progess");
- udc_state_transition(udc_device->device_state, STATE_DEFAULT);
- }
-
- /* Device Enumeration completed */
- if (readl(&udc_regs_p->dev_int) & DEV_INT_ENUM) {
- writel(DEV_INT_ENUM, &udc_regs_p->dev_int);
-
- /* Endpoint interrupt enabled for Ctrl IN & Ctrl OUT */
- writel(readl(&udc_regs_p->endp_int_mask) & ~0x10001,
- &udc_regs_p->endp_int_mask);
-
- UDCDBG("default -> addressed");
- udc_state_transition(udc_device->device_state, STATE_ADDRESSED);
- }
-
- /* The USB will be in SUSPEND in 3 ms */
- if (readl(&udc_regs_p->dev_int) & DEV_INT_INACTIVE) {
- writel(DEV_INT_INACTIVE, &udc_regs_p->dev_int);
-
- UDCDBG("entering inactive state");
- /* usbd_device_event_irq(udc_device, DEVICE_BUS_INACTIVE, 0); */
- }
-
- /* SetConfiguration command received */
- if (readl(&udc_regs_p->dev_int) & DEV_INT_SETCFG) {
- writel(DEV_INT_SETCFG, &udc_regs_p->dev_int);
-
- UDCDBG("entering configured state");
- udc_state_transition(udc_device->device_state,
- STATE_CONFIGURED);
- }
-
- /* SetInterface command received */
- if (readl(&udc_regs_p->dev_int) & DEV_INT_SETINTF)
- writel(DEV_INT_SETINTF, &udc_regs_p->dev_int);
-
- /* USB Suspend detected on cable */
- if (readl(&udc_regs_p->dev_int) & DEV_INT_SUSPUSB) {
- writel(DEV_INT_SUSPUSB, &udc_regs_p->dev_int);
-
- UDCDBG("entering suspended state");
- usbd_device_event_irq(udc_device, DEVICE_BUS_INACTIVE, 0);
- }
-
- /* USB Start-Of-Frame detected on cable */
- if (readl(&udc_regs_p->dev_int) & DEV_INT_SOF)
- writel(DEV_INT_SOF, &udc_regs_p->dev_int);
-}
-
-/*
- * Endpoint interrupt handling
- */
-static void dw_udc_endpoint_irq(void)
-{
- while (readl(&udc_regs_p->endp_int) & ENDP0_INT_CTRLOUT) {
-
- writel(ENDP0_INT_CTRLOUT, &udc_regs_p->endp_int);
-
- if ((readl(&outep_regs_p[0].endp_status) & ENDP_STATUS_OUTMSK)
- == ENDP_STATUS_OUT_SETUP) {
- dw_udc_setup(udc_device->bus->endpoint_array + 0);
- writel(ENDP_STATUS_OUT_SETUP,
- &outep_regs_p[0].endp_status);
-
- } else if ((readl(&outep_regs_p[0].endp_status) &
- ENDP_STATUS_OUTMSK) == ENDP_STATUS_OUT_DATA) {
- dw_udc_ep0_rx(udc_device->bus->endpoint_array + 0);
- writel(ENDP_STATUS_OUT_DATA,
- &outep_regs_p[0].endp_status);
-
- } else if ((readl(&outep_regs_p[0].endp_status) &
- ENDP_STATUS_OUTMSK) == ENDP_STATUS_OUT_NONE) {
- /* NONE received */
- }
-
- writel(0x0, &outep_regs_p[0].endp_status);
- }
-
- if (readl(&udc_regs_p->endp_int) & ENDP0_INT_CTRLIN) {
- dw_udc_ep0_tx(udc_device->bus->endpoint_array + 0);
-
- writel(ENDP_STATUS_IN, &inep_regs_p[0].endp_status);
- writel(ENDP0_INT_CTRLIN, &udc_regs_p->endp_int);
- }
-
- if (readl(&udc_regs_p->endp_int) & ENDP_INT_NONISOOUT_MSK) {
- u32 epnum = 0;
- u32 ep_int = readl(&udc_regs_p->endp_int) &
- ENDP_INT_NONISOOUT_MSK;
-
- ep_int >>= 16;
- while (0x0 == (ep_int & 0x1)) {
- ep_int >>= 1;
- epnum++;
- }
-
- writel((1 << 16) << epnum, &udc_regs_p->endp_int);
-
- if ((readl(&outep_regs_p[epnum].endp_status) &
- ENDP_STATUS_OUTMSK) == ENDP_STATUS_OUT_DATA) {
-
- dw_udc_epn_rx(epnum);
- writel(ENDP_STATUS_OUT_DATA,
- &outep_regs_p[epnum].endp_status);
- } else if ((readl(&outep_regs_p[epnum].endp_status) &
- ENDP_STATUS_OUTMSK) == ENDP_STATUS_OUT_NONE) {
- writel(0x0, &outep_regs_p[epnum].endp_status);
- }
- }
-
- if (readl(&udc_regs_p->endp_int) & ENDP_INT_NONISOIN_MSK) {
- u32 epnum = 0;
- u32 ep_int = readl(&udc_regs_p->endp_int) &
- ENDP_INT_NONISOIN_MSK;
-
- while (0x0 == (ep_int & 0x1)) {
- ep_int >>= 1;
- epnum++;
- }
-
- if (readl(&inep_regs_p[epnum].endp_status) & ENDP_STATUS_IN) {
- writel(ENDP_STATUS_IN,
- &outep_regs_p[epnum].endp_status);
- dw_udc_epn_tx(epnum);
-
- writel(ENDP_STATUS_IN,
- &outep_regs_p[epnum].endp_status);
- }
-
- writel((1 << epnum), &udc_regs_p->endp_int);
- }
-}
-
-/*
- * UDC interrupts
- */
-void udc_irq(void)
-{
- /*
- * Loop while we have interrupts.
- * If we don't do this, the input chain
- * polling delay is likely to miss
- * host requests.
- */
- while (readl(&plug_regs_p->plug_pending))
- dw_udc_plug_irq();
-
- while (readl(&udc_regs_p->dev_int))
- dw_udc_dev_irq();
-
- if (readl(&udc_regs_p->endp_int))
- dw_udc_endpoint_irq();
-}
-
-/* Flow control */
-void udc_set_nak(int epid)
-{
- writel(readl(&inep_regs_p[epid].endp_cntl) | ENDP_CNTL_SNAK,
- &inep_regs_p[epid].endp_cntl);
-
- writel(readl(&outep_regs_p[epid].endp_cntl) | ENDP_CNTL_SNAK,
- &outep_regs_p[epid].endp_cntl);
-}
-
-void udc_unset_nak(int epid)
-{
- u32 val;
-
- val = readl(&inep_regs_p[epid].endp_cntl);
- val &= ~ENDP_CNTL_SNAK;
- val |= ENDP_CNTL_CNAK;
- writel(val, &inep_regs_p[epid].endp_cntl);
-
- val = readl(&outep_regs_p[epid].endp_cntl);
- val &= ~ENDP_CNTL_SNAK;
- val |= ENDP_CNTL_CNAK;
- writel(val, &outep_regs_p[epid].endp_cntl);
-}
projects / platform / kernel / u-boot.git / commitdiff