/*
* Renesas USB driver
*
* Copyright (C) 2011 Renesas Solutions Corp.
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <linux/io.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "common.h"
/*
*** HARDWARE LIMITATION ***
*
* 1) renesas_usbhs has a limited number of controllable devices.
* it can control only 9 devices in generally.
* see DEVADDn / DCPMAXP / PIPEMAXP.
*
* 2) renesas_usbhs pipe number is limited.
* the pipe will be re-used for each devices.
* so, software should control DATA0/1 sequence of each devices.
*/
/*
* image of mod_host
*
* +--------+
* | udev 0 | --> it is used when set address
* +--------+
*
* +--------+ pipes are reused for each uep.
* | udev 1 |-+- [uep 0 (dcp) ] --+ pipe will be switched when
* +--------+ | | other device requested
* +- [uep 1 (bulk)] --|---+ +--------------+
* | +--------------> | pipe0 (dcp) |
* +- [uep 2 (bulk)] -@ | +--------------+
* | | pipe1 (isoc) |
* +--------+ | +--------------+
* | udev 2 |-+- [uep 0 (dcp) ] -@ +----------> | pipe2 (bulk) |
* +--------+ | +--------------+
* +- [uep 1 (int) ] ----+ +------> | pipe3 (bulk) |
* | | +--------------+
* +--------+ +-----|------> | pipe4 (int) |
* | udev 3 |-+- [uep 0 (dcp) ] -@ | +--------------+
* +--------+ | | | .... |
* +- [uep 1 (bulk)] -@ | | .... |
* | |
* +- [uep 2 (bulk)]-----------+
*
* @ : uep requested free pipe, but all have been used.
* now it is waiting for free pipe
*/
/*
* struct
*/
struct usbhsh_request {
struct urb *urb;
struct usbhs_pkt pkt;
};
struct usbhsh_device {
struct usb_device *usbv;
struct list_head ep_list_head; /* list of usbhsh_ep */
};
struct usbhsh_ep {
struct usbhs_pipe *pipe; /* attached pipe */
struct usbhsh_device *udev; /* attached udev */
struct usb_host_endpoint *ep;
struct list_head ep_list; /* list to usbhsh_device */
};
#define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
#define USBHSH_PORT_MAX 7 /* see DEVADDn :: HUBPORT */
struct usbhsh_hpriv {
struct usbhs_mod mod;
struct usbhs_pipe *dcp;
struct usbhsh_device udev[USBHSH_DEVICE_MAX];
u32 port_stat;
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