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u-boot-brain/drivers/usb/gadget/max3420_udc.c

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// SPDX-License-Identifier: GPL-2.0+
#include <common.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <asm/gpio.h>
#include <linux/list.h>
#include <linux/bitfield.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <malloc.h>
#include <spi.h>
#include <dm.h>
#include <g_dnl.h>
#define MAX3420_MAX_EPS 4
#define EP_MAX_PACKET 64 /* Same for all Endpoints */
#define EPNAME_SIZE 16 /* Buffer size for endpoint name */
#define MAX3420_SPI_DIR_RD 0 /* read register from MAX3420 */
#define MAX3420_SPI_DIR_WR 1 /* write register to MAX3420 */
/* SPI commands: */
#define MAX3420_SPI_ACK_MASK BIT(0)
#define MAX3420_SPI_DIR_MASK BIT(1)
#define MAX3420_SPI_REG_MASK GENMASK(7, 3)
#define MAX3420_REG_EP0FIFO 0
#define MAX3420_REG_EP1FIFO 1
#define MAX3420_REG_EP2FIFO 2
#define MAX3420_REG_EP3FIFO 3
#define MAX3420_REG_SUDFIFO 4
#define MAX3420_REG_EP0BC 5
#define MAX3420_REG_EP1BC 6
#define MAX3420_REG_EP2BC 7
#define MAX3420_REG_EP3BC 8
#define MAX3420_REG_EPSTALLS 9
#define bACKSTAT BIT(6)
#define bSTLSTAT BIT(5)
#define bSTLEP3IN BIT(4)
#define bSTLEP2IN BIT(3)
#define bSTLEP1OUT BIT(2)
#define bSTLEP0OUT BIT(1)
#define bSTLEP0IN BIT(0)
#define MAX3420_REG_CLRTOGS 10
#define bEP3DISAB BIT(7)
#define bEP2DISAB BIT(6)
#define bEP1DISAB BIT(5)
#define bCTGEP3IN BIT(4)
#define bCTGEP2IN BIT(3)
#define bCTGEP1OUT BIT(2)
#define MAX3420_REG_EPIRQ 11
#define MAX3420_REG_EPIEN 12
#define bSUDAVIRQ BIT(5)
#define bIN3BAVIRQ BIT(4)
#define bIN2BAVIRQ BIT(3)
#define bOUT1DAVIRQ BIT(2)
#define bOUT0DAVIRQ BIT(1)
#define bIN0BAVIRQ BIT(0)
#define MAX3420_REG_USBIRQ 13
#define MAX3420_REG_USBIEN 14
#define bOSCOKIRQ BIT(0)
#define bRWUDNIRQ BIT(1)
#define bBUSACTIRQ BIT(2)
#define bURESIRQ BIT(3)
#define bSUSPIRQ BIT(4)
#define bNOVBUSIRQ BIT(5)
#define bVBUSIRQ BIT(6)
#define bURESDNIRQ BIT(7)
#define MAX3420_REG_USBCTL 15
#define bHOSCSTEN BIT(7)
#define bVBGATE BIT(6)
#define bCHIPRES BIT(5)
#define bPWRDOWN BIT(4)
#define bCONNECT BIT(3)
#define bSIGRWU BIT(2)
#define MAX3420_REG_CPUCTL 16
#define bIE BIT(0)
#define MAX3420_REG_PINCTL 17
#define bEP3INAK BIT(7)
#define bEP2INAK BIT(6)
#define bEP0INAK BIT(5)
#define bFDUPSPI BIT(4)
#define bINTLEVEL BIT(3)
#define bPOSINT BIT(2)
#define bGPXB BIT(1)
#define bGPXA BIT(0)
#define MAX3420_REG_REVISION 18
#define MAX3420_REG_FNADDR 19
#define FNADDR_MASK 0x7f
#define MAX3420_REG_IOPINS 20
#define MAX3420_REG_IOPINS2 21
#define MAX3420_REG_GPINIRQ 22
#define MAX3420_REG_GPINIEN 23
#define MAX3420_REG_GPINPOL 24
#define MAX3420_REG_HIRQ 25
#define MAX3420_REG_HIEN 26
#define MAX3420_REG_MODE 27
#define MAX3420_REG_PERADDR 28
#define MAX3420_REG_HCTL 29
#define MAX3420_REG_HXFR 30
#define MAX3420_REG_HRSL 31
struct max3420_req {
struct usb_request usb_req;
struct list_head queue;
struct max3420_ep *ep;
};
struct max3420_ep {
struct max3420_udc *udc;
struct list_head queue;
char name[EPNAME_SIZE];
unsigned int maxpacket;
struct usb_ep ep_usb;
int halted;
int id;
};
struct max3420_udc {
struct max3420_ep ep[MAX3420_MAX_EPS];
struct usb_gadget_driver *driver;
bool softconnect;
struct usb_ctrlrequest setup;
struct max3420_req ep0req;
struct usb_gadget gadget;
struct spi_slave *slave;
struct udevice *dev;
u8 ep0buf[64];
int remote_wkp;
bool suspended;
};
#define to_max3420_req(r) container_of((r), struct max3420_req, usb_req)
#define to_max3420_ep(e) container_of((e), struct max3420_ep, ep_usb)
#define to_udc(g) container_of((g), struct max3420_udc, gadget)
static void spi_ack_ctrl(struct max3420_udc *udc)
{
struct spi_slave *slave = udc->slave;
u8 txdata[1];
txdata[0] = FIELD_PREP(MAX3420_SPI_ACK_MASK, 1);
spi_xfer(slave, sizeof(txdata), txdata, NULL, SPI_XFER_ONCE);
}
static u8 spi_rd8_ack(struct max3420_udc *udc, u8 reg, int ackstat)
{
struct spi_slave *slave = udc->slave;
u8 txdata[2], rxdata[2];
txdata[0] = FIELD_PREP(MAX3420_SPI_REG_MASK, reg) |
FIELD_PREP(MAX3420_SPI_DIR_MASK, MAX3420_SPI_DIR_RD) |
FIELD_PREP(MAX3420_SPI_ACK_MASK, ackstat ? 1 : 0);
rxdata[0] = 0;
rxdata[1] = 0;
spi_xfer(slave, sizeof(txdata), txdata, rxdata, SPI_XFER_ONCE);
return rxdata[1];
}
static u8 spi_rd8(struct max3420_udc *udc, u8 reg)
{
return spi_rd8_ack(udc, reg, 0);
}
static void spi_wr8_ack(struct max3420_udc *udc, u8 reg, u8 val, int ackstat)
{
struct spi_slave *slave = udc->slave;
u8 txdata[2];
txdata[0] = FIELD_PREP(MAX3420_SPI_REG_MASK, reg) |
FIELD_PREP(MAX3420_SPI_DIR_MASK, MAX3420_SPI_DIR_WR) |
FIELD_PREP(MAX3420_SPI_ACK_MASK, ackstat ? 1 : 0);
txdata[1] = val;
spi_xfer(slave, sizeof(txdata), txdata, NULL, SPI_XFER_ONCE);
}
static void spi_wr8(struct max3420_udc *udc, u8 reg, u8 val)
{
spi_wr8_ack(udc, reg, val, 0);
}
static void spi_rd_buf(struct max3420_udc *udc, u8 reg, void *buf, u8 len)
{
struct spi_slave *slave = udc->slave;
u8 txdata[1];
txdata[0] = FIELD_PREP(MAX3420_SPI_REG_MASK, reg) |
FIELD_PREP(MAX3420_SPI_DIR_MASK, MAX3420_SPI_DIR_RD);
spi_xfer(slave, sizeof(txdata), txdata, NULL, SPI_XFER_BEGIN);
spi_xfer(slave, len * 8, NULL, buf, SPI_XFER_END);
}
static void spi_wr_buf(struct max3420_udc *udc, u8 reg, void *buf, u8 len)
{
struct spi_slave *slave = udc->slave;
u8 txdata[1];
txdata[0] = FIELD_PREP(MAX3420_SPI_REG_MASK, reg) |
FIELD_PREP(MAX3420_SPI_DIR_MASK, MAX3420_SPI_DIR_WR);
spi_xfer(slave, sizeof(txdata), txdata, NULL, SPI_XFER_BEGIN);
spi_xfer(slave, len * 8, buf, NULL, SPI_XFER_END);
}
/* 0 if not-connected */
int g_dnl_board_usb_cable_connected(void)
{
return 1;
}
static void spi_max3420_enable(struct max3420_ep *ep, int enable)
{
struct max3420_udc *udc = ep->udc;
u8 epdis, epien;
if (ep->id == 0)
return;
epien = spi_rd8(udc, MAX3420_REG_EPIEN);
epdis = spi_rd8(udc, MAX3420_REG_CLRTOGS);
if (enable) {
epdis &= ~BIT(ep->id + 4);
epien |= BIT(ep->id + 1);
} else {
epdis |= BIT(ep->id + 4);
epien &= ~BIT(ep->id + 1);
}
spi_wr8(udc, MAX3420_REG_CLRTOGS, epdis);
spi_wr8(udc, MAX3420_REG_EPIEN, epien);
}
static int
max3420_ep_enable(struct usb_ep *_ep,
const struct usb_endpoint_descriptor *desc)
{
struct max3420_ep *ep = to_max3420_ep(_ep);
_ep->desc = desc;
_ep->maxpacket = usb_endpoint_maxp(desc) & 0x7ff;
spi_max3420_enable(ep, 1);
return 0;
}
static void max3420_req_done(struct max3420_req *req, int status)
{
struct max3420_ep *ep = req->ep;
if (req->usb_req.status == -EINPROGRESS)
req->usb_req.status = status;
else
status = req->usb_req.status;
if (status && status != -ESHUTDOWN)
dev_err(ep->udc->dev, "%s done %p, status %d\n",
ep->ep_usb.name, req, status);
if (req->usb_req.complete)
req->usb_req.complete(&ep->ep_usb, &req->usb_req);
}
static void max3420_ep_nuke(struct max3420_ep *ep, int status)
{
struct max3420_req *req, *r;
list_for_each_entry_safe(req, r, &ep->queue, queue) {
list_del_init(&req->queue);
max3420_req_done(req, status);
}
}
static int max3420_ep_disable(struct usb_ep *_ep)
{
struct max3420_ep *ep = to_max3420_ep(_ep);
_ep->desc = NULL;
max3420_ep_nuke(ep, -ESHUTDOWN);
spi_max3420_enable(ep, 0);
return 0;
}
static struct usb_request *
max3420_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
{
struct max3420_ep *ep = to_max3420_ep(_ep);
struct max3420_req *req = kzalloc(sizeof(*req), gfp_flags);
if (!req)
return NULL;
req->ep = ep;
INIT_LIST_HEAD(&req->queue);
return &req->usb_req;
}
static void
max3420_ep_free_request(struct usb_ep *_ep, struct usb_request *_req)
{
kfree(to_max3420_req(_req));
}
static int
max3420_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
{
struct max3420_req *req = to_max3420_req(_req);
struct max3420_ep *ep = to_max3420_ep(_ep);
_req->status = -EINPROGRESS;
_req->actual = 0;
list_add_tail(&req->queue, &ep->queue);
return 0;
}
static int max3420_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct max3420_req *req = to_max3420_req(_req);
list_del_init(&req->queue);
max3420_req_done(req, -ECONNRESET);
return 0;
}
static int max3420_ep_set_halt(struct usb_ep *_ep, int halt)
{
struct max3420_ep *ep = to_max3420_ep(_ep);
struct max3420_udc *udc = ep->udc;
u8 epstalls;
if (ep->id == 0) /* can't stall EP0 */
return 0;
epstalls = spi_rd8(udc, MAX3420_REG_EPSTALLS);
if (halt) {
ep->halted = 1;
epstalls |= BIT(ep->id + 1);
} else {
u8 clrtogs;
ep->halted = 0;
epstalls &= ~BIT(ep->id + 1);
clrtogs = spi_rd8(udc, MAX3420_REG_CLRTOGS);
clrtogs |= BIT(ep->id + 1);
spi_wr8(udc, MAX3420_REG_CLRTOGS, clrtogs);
}
spi_wr8(udc, MAX3420_REG_EPSTALLS, epstalls | bACKSTAT);
return 0;
}
static const struct usb_ep_ops max3420_ep_ops = {
.enable = max3420_ep_enable,
.disable = max3420_ep_disable,
.alloc_request = max3420_ep_alloc_request,
.free_request = max3420_ep_free_request,
.queue = max3420_ep_queue,
.dequeue = max3420_ep_dequeue,
.set_halt = max3420_ep_set_halt,
};
static void __max3420_stop(struct max3420_udc *udc)
{
u8 val;
/* Disable IRQ to CPU */
spi_wr8(udc, MAX3420_REG_CPUCTL, 0);
val = spi_rd8(udc, MAX3420_REG_USBCTL);
val |= bPWRDOWN;
val |= bHOSCSTEN;
spi_wr8(udc, MAX3420_REG_USBCTL, val);
}
static void __max3420_start(struct max3420_udc *udc)
{
u8 val;
/* configure SPI */
spi_wr8(udc, MAX3420_REG_PINCTL, bFDUPSPI);
/* Chip Reset */
spi_wr8(udc, MAX3420_REG_USBCTL, bCHIPRES);
mdelay(5);
spi_wr8(udc, MAX3420_REG_USBCTL, 0);
/* Poll for OSC to stabilize */
while (1) {
val = spi_rd8(udc, MAX3420_REG_USBIRQ);
if (val & bOSCOKIRQ)
break;
cond_resched();
}
/* Enable PULL-UP only when Vbus detected */
val = spi_rd8(udc, MAX3420_REG_USBCTL);
val |= bVBGATE | bCONNECT;
spi_wr8(udc, MAX3420_REG_USBCTL, val);
val = bURESDNIRQ | bURESIRQ;
spi_wr8(udc, MAX3420_REG_USBIEN, val);
/* Enable only EP0 interrupts */
val = bIN0BAVIRQ | bOUT0DAVIRQ | bSUDAVIRQ;
spi_wr8(udc, MAX3420_REG_EPIEN, val);
/* Enable IRQ to CPU */
spi_wr8(udc, MAX3420_REG_CPUCTL, bIE);
}
static int max3420_udc_start(struct usb_gadget *gadget,
struct usb_gadget_driver *driver)
{
struct max3420_udc *udc = to_udc(gadget);
udc->driver = driver;
udc->remote_wkp = 0;
udc->softconnect = true;
__max3420_start(udc);
return 0;
}
static int max3420_udc_stop(struct usb_gadget *gadget)
{
struct max3420_udc *udc = to_udc(gadget);
udc->driver = NULL;
udc->softconnect = false;
__max3420_stop(udc);
return 0;
}
static int max3420_wakeup(struct usb_gadget *gadget)
{
struct max3420_udc *udc = to_udc(gadget);
u8 usbctl;
/* Only if wakeup allowed by host */
if (!udc->remote_wkp || !udc->suspended)
return 0;
/* Set Remote-Wakeup Signal*/
usbctl = spi_rd8(udc, MAX3420_REG_USBCTL);
usbctl |= bSIGRWU;
spi_wr8(udc, MAX3420_REG_USBCTL, usbctl);
mdelay(5);
/* Clear Remote-WkUp Signal*/
usbctl = spi_rd8(udc, MAX3420_REG_USBCTL);
usbctl &= ~bSIGRWU;
spi_wr8(udc, MAX3420_REG_USBCTL, usbctl);
udc->suspended = false;
return 0;
}
static const struct usb_gadget_ops max3420_udc_ops = {
.udc_start = max3420_udc_start,
.udc_stop = max3420_udc_stop,
.wakeup = max3420_wakeup,
};
static struct usb_endpoint_descriptor ep0_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_CONTROL,
.wMaxPacketSize = cpu_to_le16(EP_MAX_PACKET),
};
static void max3420_getstatus(struct max3420_udc *udc)
{
struct max3420_ep *ep;
u16 status = 0;
switch (udc->setup.bRequestType & USB_RECIP_MASK) {
case USB_RECIP_DEVICE:
/* Get device status */
status = 0 << USB_DEVICE_SELF_POWERED;
status |= (udc->remote_wkp << USB_DEVICE_REMOTE_WAKEUP);
break;
case USB_RECIP_INTERFACE:
if (udc->driver->setup(&udc->gadget, &udc->setup) < 0)
goto stall;
break;
case USB_RECIP_ENDPOINT:
ep = &udc->ep[udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK];
if (ep->halted)
status = 1 << USB_ENDPOINT_HALT;
break;
default:
goto stall;
}
status = cpu_to_le16(status);
spi_wr_buf(udc, MAX3420_REG_EP0FIFO, &status, 2);
spi_wr8_ack(udc, MAX3420_REG_EP0BC, 2, 1);
return;
stall:
dev_err(udc->dev, "Can't respond to getstatus request\n");
spi_wr8(udc, MAX3420_REG_EPSTALLS, bSTLEP0IN | bSTLEP0OUT | bSTLSTAT);
}
static void max3420_set_clear_feature(struct max3420_udc *udc)
{
int set = udc->setup.bRequest == USB_REQ_SET_FEATURE;
struct max3420_ep *ep;
int id;
switch (udc->setup.bRequestType) {
case USB_RECIP_DEVICE:
if (udc->setup.wValue != USB_DEVICE_REMOTE_WAKEUP)
break;
if (udc->setup.bRequest == USB_REQ_SET_FEATURE)
udc->remote_wkp = 1;
else
udc->remote_wkp = 0;
return spi_ack_ctrl(udc);
case USB_RECIP_ENDPOINT:
if (udc->setup.wValue != USB_ENDPOINT_HALT)
break;
id = udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK;
ep = &udc->ep[id];
max3420_ep_set_halt(&ep->ep_usb, set);
return;
default:
break;
}
dev_err(udc->dev, "Can't respond to SET/CLEAR FEATURE\n");
spi_wr8(udc, MAX3420_REG_EPSTALLS, bSTLEP0IN | bSTLEP0OUT | bSTLSTAT);
}
static void max3420_handle_setup(struct max3420_udc *udc)
{
struct usb_ctrlrequest setup;
u8 addr;
spi_rd_buf(udc, MAX3420_REG_SUDFIFO, (void *)&setup, 8);
udc->setup = setup;
udc->setup.wValue = cpu_to_le16(setup.wValue);
udc->setup.wIndex = cpu_to_le16(setup.wIndex);
udc->setup.wLength = cpu_to_le16(setup.wLength);
switch (udc->setup.bRequest) {
case USB_REQ_GET_STATUS:
/* Data+Status phase form udc */
if ((udc->setup.bRequestType &
(USB_DIR_IN | USB_TYPE_MASK)) !=
(USB_DIR_IN | USB_TYPE_STANDARD)) {
break;
}
return max3420_getstatus(udc);
case USB_REQ_SET_ADDRESS:
/* Status phase from udc */
if (udc->setup.bRequestType != (USB_DIR_OUT |
USB_TYPE_STANDARD | USB_RECIP_DEVICE))
break;
addr = spi_rd8_ack(udc, MAX3420_REG_FNADDR, 1);
dev_dbg(udc->dev, "Assigned Address=%d/%d\n",
udc->setup.wValue, addr);
return;
case USB_REQ_CLEAR_FEATURE:
case USB_REQ_SET_FEATURE:
/* Requests with no data phase, status phase from udc */
if ((udc->setup.bRequestType & USB_TYPE_MASK)
!= USB_TYPE_STANDARD)
break;
return max3420_set_clear_feature(udc);
default:
break;
}
if (udc->driver->setup(&udc->gadget, &setup) < 0) {
/* Stall EP0 */
spi_wr8(udc, MAX3420_REG_EPSTALLS,
bSTLEP0IN | bSTLEP0OUT | bSTLSTAT);
}
}
static int do_data(struct max3420_udc *udc, int ep_id, int in)
{
struct max3420_ep *ep = &udc->ep[ep_id];
struct max3420_req *req;
int done, length, psz;
void *buf;
if (list_empty(&ep->queue))
return 0;
req = list_first_entry(&ep->queue, struct max3420_req, queue);
buf = req->usb_req.buf + req->usb_req.actual;
psz = ep->ep_usb.maxpacket;
length = req->usb_req.length - req->usb_req.actual;
length = min(length, psz);
if (length == 0) {
done = 1;
goto xfer_done;
}
done = 0;
if (in) {
spi_wr_buf(udc, MAX3420_REG_EP0FIFO + ep_id, buf, length);
spi_wr8(udc, MAX3420_REG_EP0BC + ep_id, length);
if (length < psz)
done = 1;
} else {
psz = spi_rd8(udc, MAX3420_REG_EP0BC + ep_id);
length = min(length, psz);
spi_rd_buf(udc, MAX3420_REG_EP0FIFO + ep_id, buf, length);
if (length < ep->ep_usb.maxpacket)
done = 1;
}
req->usb_req.actual += length;
if (req->usb_req.actual == req->usb_req.length)
done = 1;
xfer_done:
if (done) {
list_del_init(&req->queue);
if (ep_id == 0)
spi_ack_ctrl(udc);
max3420_req_done(req, 0);
}
return 1;
}
static int max3420_handle_irqs(struct max3420_udc *udc)
{
u8 epien, epirq, usbirq, usbien, reg[4];
int ret = 0;
spi_rd_buf(udc, MAX3420_REG_EPIRQ, reg, 4);
epirq = reg[0];
epien = reg[1];
usbirq = reg[2];
usbien = reg[3];
usbirq &= usbien;
epirq &= epien;
if (epirq & bSUDAVIRQ) {
spi_wr8(udc, MAX3420_REG_EPIRQ, bSUDAVIRQ);
max3420_handle_setup(udc);
return 1;
}
if (usbirq & bVBUSIRQ) {
spi_wr8(udc, MAX3420_REG_USBIRQ, bVBUSIRQ);
dev_dbg(udc->dev, "Cable plugged in\n");
g_dnl_clear_detach();
return 1;
}
if (usbirq & bNOVBUSIRQ) {
spi_wr8(udc, MAX3420_REG_USBIRQ, bNOVBUSIRQ);
dev_dbg(udc->dev, "Cable pulled out\n");
g_dnl_trigger_detach();
return 1;
}
if (usbirq & bURESIRQ) {
spi_wr8(udc, MAX3420_REG_USBIRQ, bURESIRQ);
return 1;
}
if (usbirq & bURESDNIRQ) {
spi_wr8(udc, MAX3420_REG_USBIRQ, bURESDNIRQ);
spi_wr8(udc, MAX3420_REG_USBIEN, bURESDNIRQ | bURESIRQ);
spi_wr8(udc, MAX3420_REG_EPIEN, bSUDAVIRQ
| bIN0BAVIRQ | bOUT0DAVIRQ);
return 1;
}
if (usbirq & bSUSPIRQ) {
spi_wr8(udc, MAX3420_REG_USBIRQ, bSUSPIRQ);
dev_dbg(udc->dev, "USB Suspend - Enter\n");
udc->suspended = true;
return 1;
}
if (usbirq & bBUSACTIRQ) {
spi_wr8(udc, MAX3420_REG_USBIRQ, bBUSACTIRQ);
dev_dbg(udc->dev, "USB Suspend - Exit\n");
udc->suspended = false;
return 1;
}
if (usbirq & bRWUDNIRQ) {
spi_wr8(udc, MAX3420_REG_USBIRQ, bRWUDNIRQ);
dev_dbg(udc->dev, "Asked Host to wakeup\n");
return 1;
}
if (usbirq & bOSCOKIRQ) {
spi_wr8(udc, MAX3420_REG_USBIRQ, bOSCOKIRQ);
dev_dbg(udc->dev, "Osc stabilized, start work\n");
return 1;
}
if (epirq & bOUT0DAVIRQ && do_data(udc, 0, 0)) {
spi_wr8_ack(udc, MAX3420_REG_EPIRQ, bOUT0DAVIRQ, 1);
ret = 1;
}
if (epirq & bIN0BAVIRQ && do_data(udc, 0, 1))
ret = 1;
if (epirq & bOUT1DAVIRQ && do_data(udc, 1, 0)) {
spi_wr8_ack(udc, MAX3420_REG_EPIRQ, bOUT1DAVIRQ, 1);
ret = 1;
}
if (epirq & bIN2BAVIRQ && do_data(udc, 2, 1))
ret = 1;
if (epirq & bIN3BAVIRQ && do_data(udc, 3, 1))
ret = 1;
return ret;
}
static int max3420_irq(struct max3420_udc *udc)
{
do_data(udc, 0, 1); /* get done with the EP0 ZLP */
return max3420_handle_irqs(udc);
}
static void max3420_setup_eps(struct max3420_udc *udc)
{
int i;
INIT_LIST_HEAD(&udc->gadget.ep_list);
INIT_LIST_HEAD(&udc->ep[0].ep_usb.ep_list);
for (i = 0; i < MAX3420_MAX_EPS; i++) {
struct max3420_ep *ep = &udc->ep[i];
INIT_LIST_HEAD(&ep->queue);
ep->id = i;
ep->udc = udc;
ep->ep_usb.ops = &max3420_ep_ops;
ep->ep_usb.name = ep->name;
ep->ep_usb.maxpacket = EP_MAX_PACKET;
if (i == 0) {
ep->ep_usb.desc = &ep0_desc;
snprintf(ep->name, EPNAME_SIZE, "ep0");
continue;
}
list_add_tail(&ep->ep_usb.ep_list, &udc->gadget.ep_list);
if (i == 1)
snprintf(ep->name, EPNAME_SIZE, "ep1out-bulk");
else
snprintf(ep->name, EPNAME_SIZE, "ep%din-bulk", i);
};
}
static void max3420_setup_spi(struct max3420_udc *udc)
{
u8 reg[8];
spi_claim_bus(udc->slave);
spi_rd_buf(udc, MAX3420_REG_EPIRQ, reg, 8);
/* configure SPI */
spi_wr8(udc, MAX3420_REG_PINCTL, bFDUPSPI);
}
int dm_usb_gadget_handle_interrupts(struct udevice *dev)
{
struct max3420_udc *udc = dev_get_priv(dev);
return max3420_irq(udc);
}
static int max3420_udc_probe(struct udevice *dev)
{
struct max3420_udc *udc = dev_get_priv(dev);
struct dm_spi_slave_plat *slave_pdata;
struct udevice *bus = dev->parent;
int busnum = dev_seq(bus);
unsigned int cs;
uint speed, mode;
struct udevice *spid;
slave_pdata = dev_get_parent_plat(dev);
cs = slave_pdata->cs;
speed = slave_pdata->max_hz;
mode = slave_pdata->mode;
spi_get_bus_and_cs(busnum, cs, speed, mode, "spi_generic_drv",
NULL, &spid, &udc->slave);
udc->dev = dev;
udc->gadget.ep0 = &udc->ep[0].ep_usb;
udc->gadget.max_speed = USB_SPEED_FULL;
udc->gadget.speed = USB_SPEED_FULL;
udc->gadget.is_dualspeed = 0;
udc->gadget.ops = &max3420_udc_ops;
udc->gadget.name = "max3420-udc";
max3420_setup_eps(udc);
max3420_setup_spi(udc);
usb_add_gadget_udc((struct device *)dev, &udc->gadget);
return 0;
}
static int max3420_udc_remove(struct udevice *dev)
{
struct max3420_udc *udc = dev_get_priv(dev);
usb_del_gadget_udc(&udc->gadget);
spi_release_bus(udc->slave);
return 0;
}
static const struct udevice_id max3420_ids[] = {
{ .compatible = "maxim,max3421-udc" },
{ }
};
U_BOOT_DRIVER(max3420_generic_udc) = {
.name = "max3420-udc",
.id = UCLASS_USB_GADGET_GENERIC,
.of_match = max3420_ids,
.probe = max3420_udc_probe,
.remove = max3420_udc_remove,
.priv_auto = sizeof(struct max3420_udc),
};
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