2012-02-20 14:12:08 -07:00
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/* -----------------------------------------------------------------------------
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* Copyright (c) 2011 Ozmo Inc
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* Released under the GNU General Public License Version 2 (GPLv2).
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*
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* This file implements the protocol specific parts of the USB service for a PD.
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* -----------------------------------------------------------------------------
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*/
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#include <linux/module.h>
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#include <linux/timer.h>
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#include <linux/sched.h>
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#include <linux/netdevice.h>
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#include <linux/errno.h>
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#include <linux/input.h>
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#include <asm/unaligned.h>
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2013-07-23 06:45:00 -06:00
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#include "ozdbg.h"
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2012-02-20 14:12:08 -07:00
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#include "ozprotocol.h"
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#include "ozeltbuf.h"
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#include "ozpd.h"
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#include "ozproto.h"
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#include "ozusbif.h"
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#include "ozhcd.h"
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#include "ozusbsvc.h"
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2013-08-13 11:24:22 -06:00
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2012-02-20 14:12:08 -07:00
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#define MAX_ISOC_FIXED_DATA (253-sizeof(struct oz_isoc_fixed))
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2013-08-13 11:24:22 -06:00
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2013-08-23 09:11:02 -06:00
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/*
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2012-02-20 14:12:08 -07:00
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* Context: softirq
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*/
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static int oz_usb_submit_elt(struct oz_elt_buf *eb, struct oz_elt_info *ei,
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struct oz_usb_ctx *usb_ctx, u8 strid, u8 isoc)
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{
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int ret;
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struct oz_elt *elt = (struct oz_elt *)ei->data;
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struct oz_app_hdr *app_hdr = (struct oz_app_hdr *)(elt+1);
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2013-08-13 11:24:21 -06:00
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2012-02-20 14:12:08 -07:00
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elt->type = OZ_ELT_APP_DATA;
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ei->app_id = OZ_APPID_USB;
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ei->length = elt->length + sizeof(struct oz_elt);
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app_hdr->app_id = OZ_APPID_USB;
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spin_lock_bh(&eb->lock);
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if (isoc == 0) {
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app_hdr->elt_seq_num = usb_ctx->tx_seq_num++;
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if (usb_ctx->tx_seq_num == 0)
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usb_ctx->tx_seq_num = 1;
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}
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ret = oz_queue_elt_info(eb, isoc, strid, ei);
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if (ret)
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oz_elt_info_free(eb, ei);
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spin_unlock_bh(&eb->lock);
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return ret;
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}
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2013-08-13 11:24:22 -06:00
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2013-08-23 09:11:02 -06:00
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/*
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2012-02-20 14:12:08 -07:00
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* Context: softirq
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*/
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int oz_usb_get_desc_req(void *hpd, u8 req_id, u8 req_type, u8 desc_type,
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u8 index, u16 windex, int offset, int len)
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{
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struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
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struct oz_pd *pd = usb_ctx->pd;
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struct oz_elt *elt;
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struct oz_get_desc_req *body;
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struct oz_elt_buf *eb = &pd->elt_buff;
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struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
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2013-08-13 11:24:21 -06:00
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2013-07-23 06:45:00 -06:00
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oz_dbg(ON, " req_type = 0x%x\n", req_type);
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oz_dbg(ON, " desc_type = 0x%x\n", desc_type);
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oz_dbg(ON, " index = 0x%x\n", index);
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oz_dbg(ON, " windex = 0x%x\n", windex);
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oz_dbg(ON, " offset = 0x%x\n", offset);
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oz_dbg(ON, " len = 0x%x\n", len);
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2012-02-20 14:12:08 -07:00
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if (len > 200)
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len = 200;
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2013-02-15 07:22:23 -07:00
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if (ei == NULL)
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2012-02-20 14:12:08 -07:00
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return -1;
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elt = (struct oz_elt *)ei->data;
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elt->length = sizeof(struct oz_get_desc_req);
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body = (struct oz_get_desc_req *)(elt+1);
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body->type = OZ_GET_DESC_REQ;
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body->req_id = req_id;
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put_unaligned(cpu_to_le16(offset), &body->offset);
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put_unaligned(cpu_to_le16(len), &body->size);
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body->req_type = req_type;
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body->desc_type = desc_type;
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body->w_index = windex;
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body->index = index;
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return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
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}
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2013-08-13 11:24:22 -06:00
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2013-08-23 09:11:02 -06:00
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/*
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2012-02-20 14:12:08 -07:00
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* Context: tasklet
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*/
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static int oz_usb_set_config_req(void *hpd, u8 req_id, u8 index)
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{
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struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
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struct oz_pd *pd = usb_ctx->pd;
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struct oz_elt *elt;
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struct oz_elt_buf *eb = &pd->elt_buff;
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struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
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struct oz_set_config_req *body;
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2013-08-13 11:24:21 -06:00
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2013-02-15 07:22:23 -07:00
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if (ei == NULL)
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2012-02-20 14:12:08 -07:00
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return -1;
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elt = (struct oz_elt *)ei->data;
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elt->length = sizeof(struct oz_set_config_req);
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body = (struct oz_set_config_req *)(elt+1);
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body->type = OZ_SET_CONFIG_REQ;
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body->req_id = req_id;
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body->index = index;
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return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
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}
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2013-08-13 11:24:22 -06:00
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2013-08-23 09:11:02 -06:00
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/*
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2012-02-20 14:12:08 -07:00
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* Context: tasklet
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*/
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static int oz_usb_set_interface_req(void *hpd, u8 req_id, u8 index, u8 alt)
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{
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struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
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struct oz_pd *pd = usb_ctx->pd;
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struct oz_elt *elt;
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struct oz_elt_buf *eb = &pd->elt_buff;
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struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
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struct oz_set_interface_req *body;
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2013-08-13 11:24:21 -06:00
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2013-02-15 07:22:23 -07:00
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if (ei == NULL)
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2012-02-20 14:12:08 -07:00
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return -1;
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elt = (struct oz_elt *)ei->data;
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elt->length = sizeof(struct oz_set_interface_req);
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body = (struct oz_set_interface_req *)(elt+1);
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body->type = OZ_SET_INTERFACE_REQ;
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body->req_id = req_id;
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body->index = index;
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body->alternative = alt;
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return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
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}
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2013-08-13 11:24:22 -06:00
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2013-08-23 09:11:02 -06:00
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/*
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2012-02-20 14:12:08 -07:00
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* Context: tasklet
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*/
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static int oz_usb_set_clear_feature_req(void *hpd, u8 req_id, u8 type,
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u8 recipient, u8 index, __le16 feature)
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{
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struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
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struct oz_pd *pd = usb_ctx->pd;
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struct oz_elt *elt;
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struct oz_elt_buf *eb = &pd->elt_buff;
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struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
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struct oz_feature_req *body;
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2013-08-13 11:24:21 -06:00
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2013-02-15 07:22:23 -07:00
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if (ei == NULL)
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2012-02-20 14:12:08 -07:00
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return -1;
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elt = (struct oz_elt *)ei->data;
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elt->length = sizeof(struct oz_feature_req);
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body = (struct oz_feature_req *)(elt+1);
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body->type = type;
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body->req_id = req_id;
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body->recipient = recipient;
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body->index = index;
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put_unaligned(feature, &body->feature);
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return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
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}
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2013-08-13 11:24:22 -06:00
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2013-08-23 09:11:02 -06:00
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/*
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2012-02-20 14:12:08 -07:00
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* Context: tasklet
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*/
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static int oz_usb_vendor_class_req(void *hpd, u8 req_id, u8 req_type,
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2013-02-15 13:17:24 -07:00
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u8 request, __le16 value, __le16 index, const u8 *data, int data_len)
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2012-02-20 14:12:08 -07:00
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{
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struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
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struct oz_pd *pd = usb_ctx->pd;
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struct oz_elt *elt;
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struct oz_elt_buf *eb = &pd->elt_buff;
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struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
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struct oz_vendor_class_req *body;
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2013-08-13 11:24:21 -06:00
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2013-02-15 07:22:23 -07:00
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if (ei == NULL)
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2012-02-20 14:12:08 -07:00
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return -1;
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elt = (struct oz_elt *)ei->data;
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elt->length = sizeof(struct oz_vendor_class_req) - 1 + data_len;
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body = (struct oz_vendor_class_req *)(elt+1);
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body->type = OZ_VENDOR_CLASS_REQ;
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body->req_id = req_id;
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body->req_type = req_type;
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body->request = request;
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put_unaligned(value, &body->value);
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put_unaligned(index, &body->index);
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if (data_len)
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memcpy(body->data, data, data_len);
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return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
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}
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2013-08-13 11:24:22 -06:00
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2013-08-23 09:11:02 -06:00
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/*
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2012-02-20 14:12:08 -07:00
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* Context: tasklet
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*/
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int oz_usb_control_req(void *hpd, u8 req_id, struct usb_ctrlrequest *setup,
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2013-02-15 13:17:24 -07:00
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const u8 *data, int data_len)
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2012-02-20 14:12:08 -07:00
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{
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unsigned wvalue = le16_to_cpu(setup->wValue);
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unsigned windex = le16_to_cpu(setup->wIndex);
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unsigned wlength = le16_to_cpu(setup->wLength);
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int rc = 0;
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2013-08-13 11:24:21 -06:00
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2012-02-20 14:12:08 -07:00
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if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
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switch (setup->bRequest) {
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case USB_REQ_GET_DESCRIPTOR:
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rc = oz_usb_get_desc_req(hpd, req_id,
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setup->bRequestType, (u8)(wvalue>>8),
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(u8)wvalue, setup->wIndex, 0, wlength);
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break;
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case USB_REQ_SET_CONFIGURATION:
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rc = oz_usb_set_config_req(hpd, req_id, (u8)wvalue);
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break;
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case USB_REQ_SET_INTERFACE: {
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u8 if_num = (u8)windex;
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u8 alt = (u8)wvalue;
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rc = oz_usb_set_interface_req(hpd, req_id,
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if_num, alt);
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}
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break;
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case USB_REQ_SET_FEATURE:
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rc = oz_usb_set_clear_feature_req(hpd, req_id,
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OZ_SET_FEATURE_REQ,
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setup->bRequestType & 0xf, (u8)windex,
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setup->wValue);
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break;
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case USB_REQ_CLEAR_FEATURE:
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rc = oz_usb_set_clear_feature_req(hpd, req_id,
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OZ_CLEAR_FEATURE_REQ,
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setup->bRequestType & 0xf,
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(u8)windex, setup->wValue);
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break;
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}
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} else {
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rc = oz_usb_vendor_class_req(hpd, req_id, setup->bRequestType,
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setup->bRequest, setup->wValue, setup->wIndex,
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data, data_len);
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}
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return rc;
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}
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2013-08-13 11:24:22 -06:00
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2013-08-23 09:11:02 -06:00
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/*
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2012-02-20 14:12:08 -07:00
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* Context: softirq
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*/
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int oz_usb_send_isoc(void *hpd, u8 ep_num, struct urb *urb)
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{
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struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
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struct oz_pd *pd = usb_ctx->pd;
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struct oz_elt_buf *eb;
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int i;
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int hdr_size;
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u8 *data;
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struct usb_iso_packet_descriptor *desc;
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if (pd->mode & OZ_F_ISOC_NO_ELTS) {
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for (i = 0; i < urb->number_of_packets; i++) {
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u8 *data;
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desc = &urb->iso_frame_desc[i];
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data = ((u8 *)urb->transfer_buffer)+desc->offset;
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oz_send_isoc_unit(pd, ep_num, data, desc->length);
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}
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return 0;
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}
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hdr_size = sizeof(struct oz_isoc_fixed) - 1;
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eb = &pd->elt_buff;
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i = 0;
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while (i < urb->number_of_packets) {
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struct oz_elt_info *ei = oz_elt_info_alloc(eb);
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struct oz_elt *elt;
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struct oz_isoc_fixed *body;
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int unit_count;
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int unit_size;
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int rem;
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2013-02-15 07:22:23 -07:00
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if (ei == NULL)
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2012-02-20 14:12:08 -07:00
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return -1;
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rem = MAX_ISOC_FIXED_DATA;
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elt = (struct oz_elt *)ei->data;
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body = (struct oz_isoc_fixed *)(elt + 1);
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body->type = OZ_USB_ENDPOINT_DATA;
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body->endpoint = ep_num;
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body->format = OZ_DATA_F_ISOC_FIXED;
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unit_size = urb->iso_frame_desc[i].length;
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body->unit_size = (u8)unit_size;
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data = ((u8 *)(elt+1)) + hdr_size;
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unit_count = 0;
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while (i < urb->number_of_packets) {
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desc = &urb->iso_frame_desc[i];
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if ((unit_size == desc->length) &&
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(desc->length <= rem)) {
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memcpy(data, ((u8 *)urb->transfer_buffer) +
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desc->offset, unit_size);
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data += unit_size;
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rem -= unit_size;
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unit_count++;
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desc->status = 0;
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desc->actual_length = desc->length;
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i++;
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} else {
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break;
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}
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}
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elt->length = hdr_size + MAX_ISOC_FIXED_DATA - rem;
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/* Store the number of units in body->frame_number for the
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* moment. This field will be correctly determined before
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|
|
* 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;
|
|
|
|
}
|
2013-08-13 11:24:22 -06:00
|
|
|
|
2013-08-23 09:11:02 -06:00
|
|
|
/*
|
2012-02-20 14:12:08 -07:00
|
|
|
* Context: softirq-serialized
|
|
|
|
*/
|
2013-02-15 13:17:22 -07:00
|
|
|
static void oz_usb_handle_ep_data(struct oz_usb_ctx *usb_ctx,
|
2012-02-20 14:12:08 -07:00
|
|
|
struct oz_usb_hdr *usb_hdr, int len)
|
|
|
|
{
|
|
|
|
struct oz_data *data_hdr = (struct oz_data *)usb_hdr;
|
2013-08-13 11:24:21 -06:00
|
|
|
|
2012-02-20 14:12:08 -07:00
|
|
|
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;
|
|
|
|
int 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;
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
2013-08-13 11:24:22 -06:00
|
|
|
|
2013-08-23 09:11:02 -06:00
|
|
|
/*
|
2012-02-20 14:12:08 -07:00
|
|
|
* 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-1]);
|
|
|
|
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
|
|
|
|
if (usb_ctx)
|
|
|
|
oz_usb_get(usb_ctx);
|
|
|
|
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
|
2013-02-15 07:22:23 -07:00
|
|
|
if (usb_ctx == NULL)
|
2012-02-20 14:12:08 -07:00
|
|
|
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;
|
|
|
|
int data_len = elt->length -
|
|
|
|
sizeof(struct oz_get_desc_rsp) + 1;
|
|
|
|
u16 offs = le16_to_cpu(get_unaligned(&body->offset));
|
|
|
|
u16 total_size =
|
|
|
|
le16_to_cpu(get_unaligned(&body->total_size));
|
2013-07-23 06:45:00 -06:00
|
|
|
oz_dbg(ON, "USB_REQ_GET_DESCRIPTOR - cnf\n");
|
2012-02-20 14:12:08 -07:00
|
|
|
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,
|
2013-02-15 07:22:23 -07:00
|
|
|
body->rcode, NULL, 0);
|
2012-02-20 14:12:08 -07:00
|
|
|
}
|
|
|
|
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,
|
2013-02-15 07:22:23 -07:00
|
|
|
body->req_id, body->rcode, NULL, 0);
|
2012-02-20 14:12:08 -07:00
|
|
|
}
|
|
|
|
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);
|
|
|
|
}
|
2013-08-13 11:24:22 -06:00
|
|
|
|
2013-08-23 09:11:02 -06:00
|
|
|
/*
|
2012-02-20 14:12:08 -07:00
|
|
|
* Context: softirq, process
|
|
|
|
*/
|
|
|
|
void oz_usb_farewell(struct oz_pd *pd, u8 ep_num, u8 *data, u8 len)
|
|
|
|
{
|
|
|
|
struct oz_usb_ctx *usb_ctx;
|
2013-08-13 11:24:21 -06:00
|
|
|
|
2012-02-20 14:12:08 -07:00
|
|
|
spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
|
|
|
|
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
|
|
|
|
if (usb_ctx)
|
|
|
|
oz_usb_get(usb_ctx);
|
|
|
|
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
|
2013-02-15 07:22:23 -07:00
|
|
|
if (usb_ctx == NULL)
|
2012-02-20 14:12:08 -07:00
|
|
|
return; /* Context has gone so nothing to do. */
|
|
|
|
if (!usb_ctx->stopped) {
|
2013-07-23 06:45:00 -06:00
|
|
|
oz_dbg(ON, "Farewell indicated ep = 0x%x\n", ep_num);
|
2012-02-20 14:12:08 -07:00
|
|
|
oz_hcd_data_ind(usb_ctx->hport, ep_num, data, len);
|
|
|
|
}
|
|
|
|
oz_usb_put(usb_ctx);
|
|
|
|
}
|