Initial import

1 files changed, 429 insertions, 0 deletions

diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
new file mode 100644
index 000000000..6d6200e37
--- /dev/null
+++ b/drivers/usb/chipidea/ci.h
@@ -0,0 +1,429 @@
+/*
+ * ci.h - common structures, functions, and macros of the ChipIdea driver
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * 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.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_CI_H
+#define __DRIVERS_USB_CHIPIDEA_CI_H
+
+#include <linux/list.h>
+#include <linux/irqreturn.h>
+#include <linux/usb.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg-fsm.h>
+
+/******************************************************************************
+ * DEFINE
+ *****************************************************************************/
+#define TD_PAGE_COUNT      5
+#define CI_HDRC_PAGE_SIZE  4096ul /* page size for TD's */
+#define ENDPT_MAX          32
+
+/******************************************************************************
+ * REGISTERS
+ *****************************************************************************/
+/* Identification Registers */
+#define ID_ID				0x0
+#define ID_HWGENERAL			0x4
+#define ID_HWHOST			0x8
+#define ID_HWDEVICE			0xc
+#define ID_HWTXBUF			0x10
+#define ID_HWRXBUF			0x14
+#define ID_SBUSCFG			0x90
+
+/* register indices */
+enum ci_hw_regs {
+	CAP_CAPLENGTH,
+	CAP_HCCPARAMS,
+	CAP_DCCPARAMS,
+	CAP_TESTMODE,
+	CAP_LAST = CAP_TESTMODE,
+	OP_USBCMD,
+	OP_USBSTS,
+	OP_USBINTR,
+	OP_DEVICEADDR,
+	OP_ENDPTLISTADDR,
+	OP_PORTSC,
+	OP_DEVLC,
+	OP_OTGSC,
+	OP_USBMODE,
+	OP_ENDPTSETUPSTAT,
+	OP_ENDPTPRIME,
+	OP_ENDPTFLUSH,
+	OP_ENDPTSTAT,
+	OP_ENDPTCOMPLETE,
+	OP_ENDPTCTRL,
+	/* endptctrl1..15 follow */
+	OP_LAST = OP_ENDPTCTRL + ENDPT_MAX / 2,
+};
+
+/******************************************************************************
+ * STRUCTURES
+ *****************************************************************************/
+/**
+ * struct ci_hw_ep - endpoint representation
+ * @ep: endpoint structure for gadget drivers
+ * @dir: endpoint direction (TX/RX)
+ * @num: endpoint number
+ * @type: endpoint type
+ * @name: string description of the endpoint
+ * @qh: queue head for this endpoint
+ * @wedge: is the endpoint wedged
+ * @ci: pointer to the controller
+ * @lock: pointer to controller's spinlock
+ * @td_pool: pointer to controller's TD pool
+ */
+struct ci_hw_ep {
+	struct usb_ep				ep;
+	u8					dir;
+	u8					num;
+	u8					type;
+	char					name[16];
+	struct {
+		struct list_head	queue;
+		struct ci_hw_qh		*ptr;
+		dma_addr_t		dma;
+	}					qh;
+	int					wedge;
+
+	/* global resources */
+	struct ci_hdrc				*ci;
+	spinlock_t				*lock;
+	struct dma_pool				*td_pool;
+	struct td_node				*pending_td;
+};
+
+enum ci_role {
+	CI_ROLE_HOST = 0,
+	CI_ROLE_GADGET,
+	CI_ROLE_END,
+};
+
+enum ci_revision {
+	CI_REVISION_1X = 10,	/* Revision 1.x */
+	CI_REVISION_20 = 20, /* Revision 2.0 */
+	CI_REVISION_21, /* Revision 2.1 */
+	CI_REVISION_22, /* Revision 2.2 */
+	CI_REVISION_23, /* Revision 2.3 */
+	CI_REVISION_24, /* Revision 2.4 */
+	CI_REVISION_25, /* Revision 2.5 */
+	CI_REVISION_25_PLUS, /* Revision above than 2.5 */
+	CI_REVISION_UNKNOWN = 99, /* Unknown Revision */
+};
+
+/**
+ * struct ci_role_driver - host/gadget role driver
+ * @start: start this role
+ * @stop: stop this role
+ * @irq: irq handler for this role
+ * @name: role name string (host/gadget)
+ */
+struct ci_role_driver {
+	int		(*start)(struct ci_hdrc *);
+	void		(*stop)(struct ci_hdrc *);
+	irqreturn_t	(*irq)(struct ci_hdrc *);
+	const char	*name;
+};
+
+/**
+ * struct hw_bank - hardware register mapping representation
+ * @lpm: set if the device is LPM capable
+ * @phys: physical address of the controller's registers
+ * @abs: absolute address of the beginning of register window
+ * @cap: capability registers
+ * @op: operational registers
+ * @size: size of the register window
+ * @regmap: register lookup table
+ */
+struct hw_bank {
+	unsigned	lpm;
+	resource_size_t	phys;
+	void __iomem	*abs;
+	void __iomem	*cap;
+	void __iomem	*op;
+	size_t		size;
+	void __iomem	*regmap[OP_LAST + 1];
+};
+
+/**
+ * struct ci_hdrc - chipidea device representation
+ * @dev: pointer to parent device
+ * @lock: access synchronization
+ * @hw_bank: hardware register mapping
+ * @irq: IRQ number
+ * @roles: array of supported roles for this controller
+ * @role: current role
+ * @is_otg: if the device is otg-capable
+ * @fsm: otg finite state machine
+ * @otg_fsm_hrtimer: hrtimer for otg fsm timers
+ * @hr_timeouts: time out list for active otg fsm timers
+ * @enabled_otg_timer_bits: bits of enabled otg timers
+ * @next_otg_timer: next nearest enabled timer to be expired
+ * @work: work for role changing
+ * @wq: workqueue thread
+ * @qh_pool: allocation pool for queue heads
+ * @td_pool: allocation pool for transfer descriptors
+ * @gadget: device side representation for peripheral controller
+ * @driver: gadget driver
+ * @hw_ep_max: total number of endpoints supported by hardware
+ * @ci_hw_ep: array of endpoints
+ * @ep0_dir: ep0 direction
+ * @ep0out: pointer to ep0 OUT endpoint
+ * @ep0in: pointer to ep0 IN endpoint
+ * @status: ep0 status request
+ * @setaddr: if we should set the address on status completion
+ * @address: usb address received from the host
+ * @remote_wakeup: host-enabled remote wakeup
+ * @suspended: suspended by host
+ * @test_mode: the selected test mode
+ * @platdata: platform specific information supplied by parent device
+ * @vbus_active: is VBUS active
+ * @phy: pointer to PHY, if any
+ * @usb_phy: pointer to USB PHY, if any and if using the USB PHY framework
+ * @hcd: pointer to usb_hcd for ehci host driver
+ * @debugfs: root dentry for this controller in debugfs
+ * @id_event: indicates there is an id event, and handled at ci_otg_work
+ * @b_sess_valid_event: indicates there is a vbus event, and handled
+ * at ci_otg_work
+ * @imx28_write_fix: Freescale imx28 needs swp instruction for writing
+ * @supports_runtime_pm: if runtime pm is supported
+ * @in_lpm: if the core in low power mode
+ * @wakeup_int: if wakeup interrupt occur
+ * @rev: The revision number for controller
+ */
+struct ci_hdrc {
+	struct device			*dev;
+	spinlock_t			lock;
+	struct hw_bank			hw_bank;
+	int				irq;
+	struct ci_role_driver		*roles[CI_ROLE_END];
+	enum ci_role			role;
+	bool				is_otg;
+	struct usb_otg			otg;
+	struct otg_fsm			fsm;
+	struct hrtimer			otg_fsm_hrtimer;
+	ktime_t				hr_timeouts[NUM_OTG_FSM_TIMERS];
+	unsigned			enabled_otg_timer_bits;
+	enum otg_fsm_timer		next_otg_timer;
+	struct work_struct		work;
+	struct workqueue_struct		*wq;
+
+	struct dma_pool			*qh_pool;
+	struct dma_pool			*td_pool;
+
+	struct usb_gadget		gadget;
+	struct usb_gadget_driver	*driver;
+	unsigned			hw_ep_max;
+	struct ci_hw_ep			ci_hw_ep[ENDPT_MAX];
+	u32				ep0_dir;
+	struct ci_hw_ep			*ep0out, *ep0in;
+
+	struct usb_request		*status;
+	bool				setaddr;
+	u8				address;
+	u8				remote_wakeup;
+	u8				suspended;
+	u8				test_mode;
+
+	struct ci_hdrc_platform_data	*platdata;
+	int				vbus_active;
+	struct phy			*phy;
+	/* old usb_phy interface */
+	struct usb_phy			*usb_phy;
+	struct usb_hcd			*hcd;
+	struct dentry			*debugfs;
+	bool				id_event;
+	bool				b_sess_valid_event;
+	bool				imx28_write_fix;
+	bool				supports_runtime_pm;
+	bool				in_lpm;
+	bool				wakeup_int;
+	enum ci_revision		rev;
+};
+
+static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci)
+{
+	BUG_ON(ci->role >= CI_ROLE_END || !ci->roles[ci->role]);
+	return ci->roles[ci->role];
+}
+
+static inline int ci_role_start(struct ci_hdrc *ci, enum ci_role role)
+{
+	int ret;
+
+	if (role >= CI_ROLE_END)
+		return -EINVAL;
+
+	if (!ci->roles[role])
+		return -ENXIO;
+
+	ret = ci->roles[role]->start(ci);
+	if (!ret)
+		ci->role = role;
+	return ret;
+}
+
+static inline void ci_role_stop(struct ci_hdrc *ci)
+{
+	enum ci_role role = ci->role;
+
+	if (role == CI_ROLE_END)
+		return;
+
+	ci->role = CI_ROLE_END;
+
+	ci->roles[role]->stop(ci);
+}
+
+/**
+ * hw_read_id_reg: reads from a identification register
+ * @ci: the controller
+ * @offset: offset from the beginning of identification registers region
+ * @mask: bitfield mask
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_read_id_reg(struct ci_hdrc *ci, u32 offset, u32 mask)
+{
+	return ioread32(ci->hw_bank.abs + offset) & mask;
+}
+
+/**
+ * hw_write_id_reg: writes to a identification register
+ * @ci: the controller
+ * @offset: offset from the beginning of identification registers region
+ * @mask: bitfield mask
+ * @data: new value
+ */
+static inline void hw_write_id_reg(struct ci_hdrc *ci, u32 offset,
+			    u32 mask, u32 data)
+{
+	if (~mask)
+		data = (ioread32(ci->hw_bank.abs + offset) & ~mask)
+			| (data & mask);
+
+	iowrite32(data, ci->hw_bank.abs + offset);
+}
+
+/**
+ * hw_read: reads from a hw register
+ * @ci: the controller
+ * @reg:  register index
+ * @mask: bitfield mask
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_read(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask)
+{
+	return ioread32(ci->hw_bank.regmap[reg]) & mask;
+}
+
+#ifdef CONFIG_SOC_IMX28
+static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr)
+{
+	__asm__ ("swp %0, %0, [%1]" : : "r"(val), "r"(addr));
+}
+#else
+static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr)
+{
+}
+#endif
+
+static inline void __hw_write(struct ci_hdrc *ci, u32 val,
+		void __iomem *addr)
+{
+	if (ci->imx28_write_fix)
+		imx28_ci_writel(val, addr);
+	else
+		iowrite32(val, addr);
+}
+
+/**
+ * hw_write: writes to a hw register
+ * @ci: the controller
+ * @reg:  register index
+ * @mask: bitfield mask
+ * @data: new value
+ */
+static inline void hw_write(struct ci_hdrc *ci, enum ci_hw_regs reg,
+			    u32 mask, u32 data)
+{
+	if (~mask)
+		data = (ioread32(ci->hw_bank.regmap[reg]) & ~mask)
+			| (data & mask);
+
+	__hw_write(ci, data, ci->hw_bank.regmap[reg]);
+}
+
+/**
+ * hw_test_and_clear: tests & clears a hw register
+ * @ci: the controller
+ * @reg:  register index
+ * @mask: bitfield mask
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_test_and_clear(struct ci_hdrc *ci, enum ci_hw_regs reg,
+				    u32 mask)
+{
+	u32 val = ioread32(ci->hw_bank.regmap[reg]) & mask;
+
+	__hw_write(ci, val, ci->hw_bank.regmap[reg]);
+	return val;
+}
+
+/**
+ * hw_test_and_write: tests & writes a hw register
+ * @ci: the controller
+ * @reg:  register index
+ * @mask: bitfield mask
+ * @data: new value
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_test_and_write(struct ci_hdrc *ci, enum ci_hw_regs reg,
+				    u32 mask, u32 data)
+{
+	u32 val = hw_read(ci, reg, ~0);
+
+	hw_write(ci, reg, mask, data);
+	return (val & mask) >> __ffs(mask);
+}
+
+/**
+ * ci_otg_is_fsm_mode: runtime check if otg controller
+ * is in otg fsm mode.
+ *
+ * @ci: chipidea device
+ */
+static inline bool ci_otg_is_fsm_mode(struct ci_hdrc *ci)
+{
+#ifdef CONFIG_USB_OTG_FSM
+	return ci->is_otg && ci->roles[CI_ROLE_HOST] &&
+					ci->roles[CI_ROLE_GADGET];
+#else
+	return false;
+#endif
+}
+
+u32 hw_read_intr_enable(struct ci_hdrc *ci);
+
+u32 hw_read_intr_status(struct ci_hdrc *ci);
+
+int hw_device_reset(struct ci_hdrc *ci);
+
+int hw_port_test_set(struct ci_hdrc *ci, u8 mode);
+
+u8 hw_port_test_get(struct ci_hdrc *ci);
+
+int hw_wait_reg(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask,
+				u32 value, unsigned int timeout_ms);
+
+#endif	/* __DRIVERS_USB_CHIPIDEA_CI_H */