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|
/*
* MUSB OTG driver defines
*
* Copyright 2005 Mentor Graphics Corporation
* Copyright (C) 2005-2006 by Texas Instruments
* Copyright (C) 2006-2007 Nokia Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __MUSB_CORE_H__
#define __MUSB_CORE_H__
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
#include <linux/timer.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb.h>
#include <linux/usb/otg.h>
#include <linux/usb/musb.h>
struct musb;
struct musb_hw_ep;
struct musb_ep;
/* Helper defines for struct musb->hwvers */
#define MUSB_HWVERS_MAJOR(x) ((x >> 10) & 0x1f)
#define MUSB_HWVERS_MINOR(x) (x & 0x3ff)
#define MUSB_HWVERS_RC 0x8000
#define MUSB_HWVERS_1300 0x52C
#define MUSB_HWVERS_1400 0x590
#define MUSB_HWVERS_1800 0x720
#define MUSB_HWVERS_1900 0x784
#define MUSB_HWVERS_2000 0x800
#include "musb_debug.h"
#include "musb_dma.h"
#include "musb_io.h"
#include "musb_regs.h"
#include "musb_gadget.h"
#include "../core/hcd.h"
#include "musb_host.h"
#ifdef CONFIG_USB_MUSB_OTG
#define is_peripheral_enabled(musb) ((musb)->board_mode != MUSB_HOST)
#define is_host_enabled(musb) ((musb)->board_mode != MUSB_PERIPHERAL)
#define is_otg_enabled(musb) ((musb)->board_mode == MUSB_OTG)
/* NOTE: otg and peripheral-only state machines start at B_IDLE.
* OTG or host-only go to A_IDLE when ID is sensed.
*/
#define is_peripheral_active(m) (!(m)->is_host)
#define is_host_active(m) ((m)->is_host)
#else
#define is_peripheral_enabled(musb) is_peripheral_capable()
#define is_host_enabled(musb) is_host_capable()
#define is_otg_enabled(musb) 0
#define is_peripheral_active(musb) is_peripheral_capable()
#define is_host_active(musb) is_host_capable()
#endif
#if defined(CONFIG_USB_MUSB_OTG) || defined(CONFIG_USB_MUSB_PERIPHERAL)
/* for some reason, the "select USB_GADGET_MUSB_HDRC" doesn't always
* override that choice selection (often USB_GADGET_DUMMY_HCD).
*/
#ifndef CONFIG_USB_GADGET_MUSB_HDRC
#error bogus Kconfig output ... select CONFIG_USB_GADGET_MUSB_HDRC
#endif
#endif /* need MUSB gadget selection */
#ifndef CONFIG_HAVE_CLK
/* Dummy stub for clk framework */
#define clk_get(dev, id) NULL
#define clk_put(clock) do {} while (0)
#define clk_enable(clock) do {} while (0)
#define clk_disable(clock) do {} while (0)
#endif
#ifdef CONFIG_PROC_FS
#include <linux/fs.h>
#define MUSB_CONFIG_PROC_FS
#endif
/****************************** PERIPHERAL ROLE *****************************/
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
#define is_peripheral_capable() (1)
extern irqreturn_t musb_g_ep0_irq(struct musb *);
extern void musb_g_tx(struct musb *, u8);
extern void musb_g_rx(struct musb *, u8);
extern void musb_g_reset(struct musb *);
extern void musb_g_suspend(struct musb *);
extern void musb_g_resume(struct musb *);
extern void musb_g_wakeup(struct musb *);
extern void musb_g_disconnect(struct musb *);
#else
#define is_peripheral_capable() (0)
static inline irqreturn_t musb_g_ep0_irq(struct musb *m) { return IRQ_NONE; }
static inline void musb_g_reset(struct musb *m) {}
static inline void musb_g_suspend(struct musb *m) {}
static inline void musb_g_resume(struct musb *m) {}
static inline void musb_g_wakeup(struct musb *m) {}
static inline void musb_g_disconnect(struct musb *m) {}
#endif
/****************************** HOST ROLE ***********************************/
#ifdef CONFIG_USB_MUSB_HDRC_HCD
#define is_host_capable() (1)
extern irqreturn_t musb_h_ep0_irq(struct musb *);
extern void musb_host_tx(struct musb *, u8);
extern void musb_host_rx(struct musb *, u8);
#else
#define is_host_capable() (0)
static inline irqreturn_t musb_h_ep0_irq(struct musb *m) { return IRQ_NONE; }
static inline void musb_host_tx(struct musb *m, u8 e) {}
static inline void musb_host_rx(struct musb *m, u8 e) {}
#endif
/****************************** CONSTANTS ********************************/
#ifndef MUSB_C_NUM_EPS
#define MUSB_C_NUM_EPS ((u8)16)
#endif
#ifndef MUSB_MAX_END0_PACKET
#define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
#endif
/* host side ep0 states */
enum musb_h_ep0_state {
MUSB_EP0_IDLE,
MUSB_EP0_START, /* expect ack of setup */
MUSB_EP0_IN, /* expect IN DATA */
MUSB_EP0_OUT, /* expect ack of OUT DATA */
MUSB_EP0_STATUS, /* expect ack of STATUS */
} __attribute__ ((packed));
/* peripheral side ep0 states */
enum musb_g_ep0_state {
MUSB_EP0_STAGE_IDLE, /* idle, waiting for SETUP */
MUSB_EP0_STAGE_SETUP, /* received SETUP */
MUSB_EP0_STAGE_TX, /* IN data */
MUSB_EP0_STAGE_RX, /* OUT data */
MUSB_EP0_STAGE_STATUSIN, /* (after OUT data) */
MUSB_EP0_STAGE_STATUSOUT, /* (after IN data) */
MUSB_EP0_STAGE_ACKWAIT, /* after zlp, before statusin */
} __attribute__ ((packed));
/*
* OTG protocol constants. See USB OTG 1.3 spec,
* sections 5.5 "Device Timings" and 6.6.5 "Timers".
*/
#define OTG_TIME_A_WAIT_VRISE 100 /* msec (max) */
#define OTG_TIME_A_WAIT_BCON 1100 /* min 1 second */
#define OTG_TIME_A_AIDL_BDIS 200 /* min 200 msec */
#define OTG_TIME_B_ASE0_BRST 100 /* min 3.125 ms */
/*************************** REGISTER ACCESS ********************************/
/* Endpoint registers (other than dynfifo setup) can be accessed either
* directly with the "flat" model, or after setting up an index register.
*/
#if defined(CONFIG_ARCH_DAVINCI) || defined(CONFIG_ARCH_OMAP2430) \
|| defined(CONFIG_ARCH_OMAP3430) || defined(CONFIG_BLACKFIN)
/* REVISIT indexed access seemed to
* misbehave (on DaVinci) for at least peripheral IN ...
*/
#define MUSB_FLAT_REG
#endif
/* TUSB mapping: "flat" plus ep0 special cases */
#if defined(CONFIG_USB_TUSB6010)
#define musb_ep_select(_mbase, _epnum) \
musb_writeb((_mbase), MUSB_INDEX, (_epnum))
#define MUSB_EP_OFFSET MUSB_TUSB_OFFSET
/* "flat" mapping: each endpoint has its own i/o address */
#elif defined(MUSB_FLAT_REG)
#define musb_ep_select(_mbase, _epnum) (((void)(_mbase)), ((void)(_epnum)))
#define MUSB_EP_OFFSET MUSB_FLAT_OFFSET
/* "indexed" mapping: INDEX register controls register bank select */
#else
#define musb_ep_select(_mbase, _epnum) \
musb_writeb((_mbase), MUSB_INDEX, (_epnum))
#define MUSB_EP_OFFSET MUSB_INDEXED_OFFSET
#endif
/****************************** FUNCTIONS ********************************/
#define MUSB_HST_MODE(_musb)\
{ (_musb)->is_host = true; }
#define MUSB_DEV_MODE(_musb) \
{ (_musb)->is_host = false; }
#define test_devctl_hst_mode(_x) \
(musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
#define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
/******************************** TYPES *************************************/
/*
* struct musb_hw_ep - endpoint hardware (bidirectional)
*
* Ordered slightly for better cacheline locality.
*/
struct musb_hw_ep {
struct musb *musb;
void __iomem *fifo;
void __iomem *regs;
#ifdef CONFIG_USB_TUSB6010
void __iomem *conf;
#endif
/* index in musb->endpoints[] */
u8 epnum;
/* hardware configuration, possibly dynamic */
bool is_shared_fifo;
bool tx_double_buffered;
bool rx_double_buffered;
u16 max_packet_sz_tx;
u16 max_packet_sz_rx;
struct dma_channel *tx_channel;
struct dma_channel *rx_channel;
#ifdef CONFIG_USB_TUSB6010
/* TUSB has "asynchronous" and "synchronous" dma modes */
dma_addr_t fifo_async;
dma_addr_t fifo_sync;
void __iomem *fifo_sync_va;
#endif
#ifdef CONFIG_USB_MUSB_HDRC_HCD
void __iomem *target_regs;
/* currently scheduled peripheral endpoint */
struct musb_qh *in_qh;
struct musb_qh *out_qh;
u8 rx_reinit;
u8 tx_reinit;
#endif
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
/* peripheral side */
struct musb_ep ep_in; /* TX */
struct musb_ep ep_out; /* RX */
#endif
};
static inline struct usb_request *next_in_request(struct musb_hw_ep *hw_ep)
{
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
return next_request(&hw_ep->ep_in);
#else
return NULL;
#endif
}
static inline struct usb_request *next_out_request(struct musb_hw_ep *hw_ep)
{
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
return next_request(&hw_ep->ep_out);
#else
return NULL;
#endif
}
/*
* struct musb - Driver instance data.
*/
struct musb {
/* device lock */
spinlock_t lock;
struct clk *clock;
irqreturn_t (*isr)(int, void *);
struct work_struct irq_work;
u16 hwvers;
/* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
#define MUSB_PORT_STAT_RESUME (1 << 31)
u32 port1_status;
#ifdef CONFIG_USB_MUSB_HDRC_HCD
unsigned long rh_timer;
enum musb_h_ep0_state ep0_stage;
/* bulk traffic normally dedicates endpoint hardware, and each
* direction has its own ring of host side endpoints.
* we try to progress the transfer at the head of each endpoint's
* queue until it completes or NAKs too much; then we try the next
* endpoint.
*/
struct musb_hw_ep *bulk_ep;
struct list_head control; /* of musb_qh */
struct list_head in_bulk; /* of musb_qh */
struct list_head out_bulk; /* of musb_qh */
struct timer_list otg_timer;
#endif
/* called with IRQs blocked; ON/nonzero implies starting a session,
* and waiting at least a_wait_vrise_tmout.
*/
void (*board_set_vbus)(struct musb *, int is_on);
struct dma_controller *dma_controller;
struct device *controller;
void __iomem *ctrl_base;
void __iomem *mregs;
#ifdef CONFIG_USB_TUSB6010
dma_addr_t async;
dma_addr_t sync;
void __iomem *sync
|