- 根目录:
- drivers
- staging
- ozwpan
- ozusbsvc1.c
/* -----------------------------------------------------------------------------
* Copyright (c) 2011 Ozmo Inc
* Released under the GNU General Public License Version 2 (GPLv2).
*
* This file implements the protocol specific parts of the USB service for a PD.
* -----------------------------------------------------------------------------
*/
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/sched.h>
#include <linux/netdevice.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <asm/unaligned.h>
#include "ozdbg.h"
#include "ozprotocol.h"
#include "ozeltbuf.h"
#include "ozpd.h"
#include "ozproto.h"
#include "ozusbif.h"
#include "ozhcd.h"
#include "ozusbsvc.h"
#define MAX_ISOC_FIXED_DATA (253-sizeof(struct oz_isoc_fixed))
/*
* Context: softirq
*/
static int oz_usb_submit_elt(struct oz_elt_buf *eb, struct oz_elt_info *ei,
struct oz_usb_ctx *usb_ctx, u8 strid, u8 isoc)
{
int ret;
struct oz_elt *elt = (struct oz_elt *)ei->data;
struct oz_app_hdr *app_hdr = (struct oz_app_hdr *)(elt+1);
elt->type = OZ_ELT_APP_DATA;
ei->app_id = OZ_APPID_USB;
ei->length = elt->length + sizeof(struct oz_elt);
app_hdr->app_id = OZ_APPID_USB;
spin_lock_bh(&eb->lock);
if (isoc == 0) {
app_hdr->elt_seq_num = usb_ctx->tx_seq_num++;
if (usb_ctx->tx_seq_num == 0)
usb_ctx->tx_seq_num = 1;
}
ret = oz_queue_elt_info(eb, isoc, strid, ei);
if (ret)
oz_elt_info_free(eb, ei);
spin_unlock_bh(&eb->lock);
return ret;
}
/*
* Context: softirq
*/
int oz_usb_get_desc_req(void *hpd, u8 req_id, u8 req_type, u8 desc_type,
u8 index, __le16 windex, int offset, int len)
{
struct oz_usb_ctx *usb_ctx = hpd;
struct oz_pd *pd = usb_ctx->pd;
struct oz_elt *elt;
struct oz_get_desc_req *body;
struct oz_elt_buf *eb = &pd->elt_buff;
struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
oz_dbg(ON, " req_type = 0x%x\n", req_type);
oz_dbg(ON, " desc_type = 0x%x\n", desc_type);
oz_dbg(ON, " index = 0x%x\n", index);
oz_dbg(ON, " windex = 0x%x\n", windex);
oz_dbg(ON, " offset = 0x%x\n", offset);
oz_dbg(ON, " len = 0x%x\n", len);
if (len > 200)
len = 200;
if (ei == NULL)
return -1;
elt = (struct oz_elt *)ei->data;
elt->length = sizeof(struct oz_get_desc_req);
body = (struct oz_get_desc_req *)(elt+1);
body->type = OZ_GET_DESC_REQ;
body->req_id = req_id;
put_unaligned(cpu_to_le16(offset), &body->offset);
put_unaligned(cpu_to_le16(len), &body->size);
body->req_type = req_type;
body->desc_type = desc_type;
body->w_index = windex;
body->index = index;
return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
}
/*
* Context: tasklet
*/
static int oz_usb_set_config_req(void *hpd, u8 req_id, u8 index)
{
struct oz_usb_ctx *usb_ctx = hpd;
struct oz_pd *pd = usb_ctx->pd;
struct oz_elt *elt;
struct oz_elt_buf *eb = &pd->elt_buff;
struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
struct oz_set_config_req *body;
if (ei == NULL)
return -1;
elt = (struct oz_elt *)ei->data;
elt->length = sizeof(struct oz_set_config_req);
body = (struct oz_set_config_req *)(elt+1);
body->type = OZ_SET_CONFIG_REQ;
body->req_id = req_id;
body->index = index;
return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
}
/*
* Context: tasklet
*/
static int oz_usb_set_interface_req(void *hpd, u8 req_id, u8 index, u8 alt)
{
struct oz_usb_ctx *usb_ctx = hpd;
struct oz_pd *pd = usb_ctx->pd;
struct oz_elt *elt;
struct oz_elt_buf *eb = &pd->elt_buff;
struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
struct oz_set_interface_req *body;
if (ei == NULL)
return -1;
elt = (struct oz_elt *)ei->data;
elt->length = sizeof(struct oz_set_interface_req);
body = (struct oz_set_interface_req *)(elt+1);
body->type = OZ_SET_INTERFACE_REQ;
body->req_id = req_id;
body->index = index;
body->alternative = alt;
return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
}
/*
* Context: tasklet
*/
static int oz_usb_set_clear_feature_req(void *hpd, u8 req_id, u8 type,
u8 recipient, u8 index, __le16 feature)
{
struct oz_usb_ctx *usb_ctx = hpd;
struct oz_pd *pd = usb_ctx->pd;
struct oz_elt *elt;
struct oz_elt_buf *eb = &pd->elt_buff;
struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
struct oz_feature_req *body;
if (ei == NULL)
return -1;
elt = (struct oz_elt *)ei->data;
elt->length = sizeof(struct oz_feature_req);
body = (struct oz_feature_req *)(elt+1);
body->type = type;
body->req_id = req_id;
body->recipient = recipient;
body->index = index;
put_unaligned(feature, &body->feature);
return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
}
/*
* Context: tasklet
*/
static int oz_usb_vendor_class_req(void *hpd, u8 req_id, u8 req_type,
u8 request, __le16 value, __le16 index, const u8 *data, int data_len)
{
struct oz_usb_ctx *usb_ctx = hpd;
struct oz_pd *pd = usb_ctx->pd;
struct oz_elt *elt;
struct oz_elt_buf *eb = &pd->elt_buff;
struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
struct oz_vendor_class_req *body;
if (ei == NULL)
return -1;
elt = (struct oz_elt *)ei->data;
elt->length = sizeof(struct oz_vendor_class_req) - 1 + data_len;
body = (struct oz_vendor_class_req *)(elt+1);
body->type = OZ_VENDOR_CLASS_REQ;
body->req_id = req_id;
body->req_type = req_type;
body->request = request;
put_unaligned(value, &body->value);
put_unaligned(index, &body->index);
if (data_len)
memcpy(body->data, data, data_len);
return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
}
/*
* Context: tasklet
*/
int oz_usb_control_req(void *hpd, u8 req_id, struct usb_ctrlrequest *setup,
const u8 *data, int data_len)
{
unsigned wvalue = le16_to_cpu(setup->wValue);
unsigned windex = le16_to_cpu(setup->wIndex);
unsigned wlength = le16_to_cpu(setup->wLength);
int rc = 0;
if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
switch (setup->bRequest) {
case USB_REQ_GET_DESCRIPTOR:
rc = oz_usb_get_desc_req(hpd, req_id,
setup->bRequestType, (u8)(wvalue>>8),
(u8)wvalue, setup->wIndex, 0, wlength);
break;
case USB_REQ_SET_CONFIGURATION:
rc = oz_usb_set_config_req(hpd, req_id, (u8)wvalue);
break;
case USB_REQ_SET_INTERFACE: {
u8 if_num = (u8)windex;
u8 alt = (u8)wvalue;
rc = oz_usb_set_interface_req(hpd, req_id,
if_num, alt);
}
break;
case USB_REQ_SET_FEATURE:
rc = oz_usb_set_clear_feature_req(hpd, req_id,
OZ_SET_FEATURE_REQ,
setup->bRequestType & 0xf, (u8)windex,
setup->wValue);
break;
case USB_REQ_CLEAR_FEATURE:
rc = oz_usb_set_clear_feature_req(hpd, req_id,
OZ_CLEAR_FEATURE_REQ,
setup->bRequestType & 0xf,
(u8)windex, setup->wValue);
break;
}
} else {
rc = oz_usb_vendor_class_req(hpd, req_id, setup->bRequestType,
setup->bRequest, setup->wValue, setup->wIndex,
data, data_len);
}
return rc;
}
/*
* Context: softirq
*/
int oz_usb_send_isoc(void *hpd, u8 ep_num, struct urb *urb)
{
struct oz_usb_ctx *usb_ctx = hpd;
struct oz_pd *pd = usb_ctx->pd;
struct oz_elt_buf *eb;
int i;
int hdr_size;
u8 *data;
struct usb_iso_packet_descriptor *desc;
if (pd->mode & OZ_F_ISOC_NO_ELTS) {
for (i = 0; i < urb->number_of_packets; i++) {
u8 *data;
desc = &urb->iso_frame_desc[i];
data = ((u8 *)urb->transfer_buffer)+desc->offset;
oz_send_isoc_unit(pd, ep_num, data, desc->length);
}
return 0;
}
hdr_size = sizeof(struct oz_isoc_fixed) - 1;
eb = &pd->elt_buff;
i = 0;
while (i < urb->number_of_packets) {
struct oz_elt_info *ei = oz_elt_info_alloc(eb);
struct oz_elt *elt;
struct oz_isoc_fixed *body;
int unit_count;
int unit_size;
int rem;
if (ei == NULL)
return -1;
rem = MAX_ISOC_FIXED_DATA;
elt = (struct oz_elt *)ei->data;
body = (struct oz_isoc_fixed *)(elt + 1);
body->type = OZ_USB_ENDPOINT_DATA;
body->endpoint = ep_num;
body->format = OZ_DATA_F_ISOC_FIXED;
unit_size = urb->iso_frame_desc[i].length;
body->unit_size = (u8)unit_size;
data = ((u8 *)(elt+1)) + hdr_size;
unit_count = 0;
while (i < urb->number_of_packets) {
desc = &urb->iso_frame_desc[i];
if ((unit_size == desc->length) &&
(desc->length <= rem)) {
memcpy(data, ((u8 *)urb->transfer_buffer) +
desc->offset, unit_size);
data += unit_size;
rem -= unit_size;
unit_count++;
desc->status = 0;
desc->actual_length = desc->length;
i++;
} else {
break;
}
}
elt->length = hdr_size + MAX_ISOC_FIXED_DATA - rem;
/* Store the number of units in body->frame_number for the
* moment. This field will be correctly determined before
* the element is sent. */
body->frame_number = (u8)unit_count;
oz_usb_submit_elt(eb, ei, usb_ctx, ep_num,
pd->mode & OZ_F_ISOC_ANYTIME);
}
return 0;
}
/*
* Context: softirq-serialized
*/
static void oz_usb_handle_ep_data(struct oz_usb_ctx *usb_ctx,
struct oz_usb_hdr *usb_hdr, int len)
{
struct oz_data *data_hdr = (struct oz_data *)usb_hdr;
switch (data_hdr->format) {
case OZ_DATA_F_MULTIPLE_FIXED: {
struct oz_multiple_fixed *body =
(struct oz_multiple_fixed *)data_hdr;
u8 *data = body->data;
unsigned int n;
if (!body->unit_size ||
len < sizeof(struct oz_multiple_fixed) - 1)
break;
n = (len - (sizeof(struct oz_multiple_fixed) - 1))
/ body->unit_size;
while (n--) {
oz_hcd_data_ind(usb_ctx->hport, body->endpoint,
data, body->unit_size);
data += body->unit_size;
}
}
break;
case OZ_DATA_F_ISOC_FIXED: {
struct oz_isoc_fixed *body =
(struct oz_isoc_fixed *)data_hdr;
int data_len = len-sizeof(struct oz_isoc_fixed)+1;
int unit_size = body->unit_size;
u8 *data = body->data;
int count;
int i;
if (!unit_size)
break;
count = data_len/unit_size;
for (i = 0; i < count; i++) {
oz_hcd_data_ind(usb_ctx->hport,
body->endpoint, data, unit_size);
data += unit_size;
}
}
break;
}
}
/*
* This is called when the PD has received a USB element. The type of element
* is determined and is then passed to an appropriate handler function.
* Context: softirq-serialized
*/
void oz_usb_rx(struct oz_pd *pd, struct oz_elt *elt)
{
struct oz_usb_hdr *usb_hdr = (struct oz_usb_hdr *)(elt + 1);
struct oz_usb_ctx *usb_ctx;
spin_lock_bh(&pd->app_lock[OZ_APPID_USB]);
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB];
if (usb_ctx)
oz_usb_get(usb_ctx);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]);
if (usb_ctx == NULL)
return; /* Context has gone so nothing to do. */
if (usb_ctx->stopped)
goto done;
/* If sequence number is non-zero then check it is not a duplicate.
* Zero sequence numbers are always accepted.
*/
if (usb_hdr->elt_seq_num != 0) {
if (((usb_ctx->rx_seq_num - usb_hdr->elt_seq_num) & 0x80) == 0)
/* Reject duplicate element. */
goto done;
}
usb_ctx->rx_seq_num = usb_hdr->elt_seq_num;
switch (usb_hdr->type) {
case OZ_GET_DESC_RSP: {
struct oz_get_desc_rsp *body =
(struct oz_get_desc_rsp *)usb_hdr;
u16 offs, total_size;
u8 data_len;
if (elt->length < sizeof(struct oz_get_desc_rsp) - 1)
break;
data_len = elt->length -
(sizeof(struct oz_get_desc_rsp) - 1);
offs = le16_to_cpu(get_unaligned(&body->offset));
total_size =
le16_to_cpu(get_unaligned(&body->total_size));
oz_dbg(ON, "USB_REQ_GET_DESCRIPTOR - cnf\n");
oz_hcd_get_desc_cnf(usb_ctx->hport, body->req_id,
body->rcode, body->data,
data_len, offs, total_size);
}
break;
case OZ_SET_CONFIG_RSP: {
struct oz_set_config_rsp *body =
(struct oz_set_config_rsp *)usb_hdr;
oz_hcd_control_cnf(usb_ctx->hport, body->req_id,
body->rcode, NULL, 0);
}
break;
case OZ_SET_INTERFACE_RSP: {
struct oz_set_interface_rsp *body =
(struct oz_set_interface_rsp *)usb_hdr;
oz_hcd_control_cnf(usb_ctx->hport,
body->req_id, body->rcode, NULL, 0);
}
break;
case OZ_VENDOR_CLASS_RSP: {
struct oz_vendor_class_rsp *body =
(struct oz_vendor_class_rsp *)usb_hdr;
oz_hcd_control_cnf(usb_ctx->hport, body->req_id,
body->rcode, body->data, elt->length-
sizeof(struct oz_vendor_class_rsp)+1);
}
break;
case OZ_USB_ENDPOINT_DATA:
oz_usb_handle_ep_data(usb_ctx, usb_hdr, elt->length);
break;
}
done:
oz_usb_put(usb_ctx);
}
/*
* Context: softirq, process
*/
void oz_usb_farewell(struct oz_pd *pd, u8 ep_num, u8 *data, u8 len)
{
struct oz_usb_ctx *usb_ctx;
spin_lock_bh(&pd->app_lock[OZ_APPID_USB]);
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB];
if (usb_ctx)
oz_usb_get(usb_ctx);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]);
if (usb_ctx == NULL)
return; /* Context has gone so nothing to do. */
if (!usb_ctx->stopped) {
oz_dbg(ON, "Farewell indicated ep = 0x%x\n", ep_num);
oz_hcd_data_ind(usb_ctx->hport, ep_num, data, len);
}
oz_usb_put(usb_ctx);
}