linux_dsm_epyc7002/drivers/usb/mtu3/mtu3.h
Chunfeng Yun df2069acb0 usb: Add MediaTek USB3 DRD driver
This patch adds support for the MediaTek USB3 controller
integrated into MT8173. It currently supports High-Speed
Peripheral Only mode.

Super-Speed Peripheral, Dual-Role Device and Host Only (xHCI)
modes will be added in the next patchs.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-27 17:02:41 +02:00

342 lines
9.1 KiB
C

/*
* mtu3.h - MediaTek USB3 DRD header
*
* Copyright (C) 2016 MediaTek Inc.
*
* Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#ifndef __MTU3_H__
#define __MTU3_H__
#include <linux/device.h>
#include <linux/dmapool.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/phy/phy.h>
#include <linux/regulator/consumer.h>
#include <linux/usb.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
struct mtu3;
struct mtu3_ep;
struct mtu3_request;
#include "mtu3_hw_regs.h"
#include "mtu3_qmu.h"
#define MU3D_EP_TXCR0(epnum) (U3D_TX1CSR0 + (((epnum) - 1) * 0x10))
#define MU3D_EP_TXCR1(epnum) (U3D_TX1CSR1 + (((epnum) - 1) * 0x10))
#define MU3D_EP_TXCR2(epnum) (U3D_TX1CSR2 + (((epnum) - 1) * 0x10))
#define MU3D_EP_RXCR0(epnum) (U3D_RX1CSR0 + (((epnum) - 1) * 0x10))
#define MU3D_EP_RXCR1(epnum) (U3D_RX1CSR1 + (((epnum) - 1) * 0x10))
#define MU3D_EP_RXCR2(epnum) (U3D_RX1CSR2 + (((epnum) - 1) * 0x10))
#define USB_QMU_RQCSR(epnum) (U3D_RXQCSR1 + (((epnum) - 1) * 0x10))
#define USB_QMU_RQSAR(epnum) (U3D_RXQSAR1 + (((epnum) - 1) * 0x10))
#define USB_QMU_RQCPR(epnum) (U3D_RXQCPR1 + (((epnum) - 1) * 0x10))
#define USB_QMU_TQCSR(epnum) (U3D_TXQCSR1 + (((epnum) - 1) * 0x10))
#define USB_QMU_TQSAR(epnum) (U3D_TXQSAR1 + (((epnum) - 1) * 0x10))
#define USB_QMU_TQCPR(epnum) (U3D_TXQCPR1 + (((epnum) - 1) * 0x10))
#define SSUSB_U2_CTRL(p) (U3D_SSUSB_U2_CTRL_0P + ((p) * 0x08))
#define MTU3_DRIVER_NAME "mtu3"
#define DMA_ADDR_INVALID (~(dma_addr_t)0)
#define MTU3_EP_ENABLED BIT(0)
#define MTU3_EP_STALL BIT(1)
#define MTU3_EP_WEDGE BIT(2)
#define MTU3_EP_BUSY BIT(3)
#define MTU3_U2_IP_SLOT_DEFAULT 1
/**
* Normally the device works on HS or SS, to simplify fifo management,
* devide fifo into some 512B parts, use bitmap to manage it; And
* 128 bits size of bitmap is large enough, that means it can manage
* up to 64KB fifo size.
* NOTE: MTU3_EP_FIFO_UNIT should be power of two
*/
#define MTU3_EP_FIFO_UNIT (1 << 9)
#define MTU3_FIFO_BIT_SIZE 128
#define MTU3_U2_IP_EP0_FIFO_SIZE 64
/**
* Maximum size of ep0 response buffer for ch9 requests,
* the SET_SEL request uses 6 so far, and GET_STATUS is 2
*/
#define EP0_RESPONSE_BUF 6
/* device operated link and speed got from DEVICE_CONF register */
enum mtu3_speed {
MTU3_SPEED_INACTIVE = 0,
MTU3_SPEED_FULL = 1,
MTU3_SPEED_HIGH = 3,
};
/**
* @MU3D_EP0_STATE_SETUP: waits for SETUP or received a SETUP
* without data stage.
* @MU3D_EP0_STATE_TX: IN data stage
* @MU3D_EP0_STATE_RX: OUT data stage
* @MU3D_EP0_STATE_TX_END: the last IN data is transferred, and
* waits for its completion interrupt
* @MU3D_EP0_STATE_STALL: ep0 is in stall status, will be auto-cleared
* after receives a SETUP.
*/
enum mtu3_g_ep0_state {
MU3D_EP0_STATE_SETUP = 1,
MU3D_EP0_STATE_TX,
MU3D_EP0_STATE_RX,
MU3D_EP0_STATE_TX_END,
MU3D_EP0_STATE_STALL,
};
/**
* @base: the base address of fifo
* @limit: the bitmap size in bits
* @bitmap: fifo bitmap in unit of @MTU3_EP_FIFO_UNIT
*/
struct mtu3_fifo_info {
u32 base;
u32 limit;
DECLARE_BITMAP(bitmap, MTU3_FIFO_BIT_SIZE);
};
/**
* General Purpose Descriptor (GPD):
* The format of TX GPD is a little different from RX one.
* And the size of GPD is 16 bytes.
*
* @flag:
* bit0: Hardware Own (HWO)
* bit1: Buffer Descriptor Present (BDP), always 0, BD is not supported
* bit2: Bypass (BPS), 1: HW skips this GPD if HWO = 1
* bit7: Interrupt On Completion (IOC)
* @chksum: This is used to validate the contents of this GPD;
* If TXQ_CS_EN / RXQ_CS_EN bit is set, an interrupt is issued
* when checksum validation fails;
* Checksum value is calculated over the 16 bytes of the GPD by default;
* @data_buf_len (RX ONLY): This value indicates the length of
* the assigned data buffer
* @next_gpd: Physical address of the next GPD
* @buffer: Physical address of the data buffer
* @buf_len:
* (TX): This value indicates the length of the assigned data buffer
* (RX): The total length of data received
* @ext_len: reserved
* @ext_flag:
* bit5 (TX ONLY): Zero Length Packet (ZLP),
*/
struct qmu_gpd {
__u8 flag;
__u8 chksum;
__le16 data_buf_len;
__le32 next_gpd;
__le32 buffer;
__le16 buf_len;
__u8 ext_len;
__u8 ext_flag;
} __packed;
/**
* dma: physical base address of GPD segment
* start: virtual base address of GPD segment
* end: the last GPD element
* enqueue: the first empty GPD to use
* dequeue: the first completed GPD serviced by ISR
* NOTE: the size of GPD ring should be >= 2
*/
struct mtu3_gpd_ring {
dma_addr_t dma;
struct qmu_gpd *start;
struct qmu_gpd *end;
struct qmu_gpd *enqueue;
struct qmu_gpd *dequeue;
};
/**
* @fifo_size: it is (@slot + 1) * @fifo_seg_size
* @fifo_seg_size: it is roundup_pow_of_two(@maxp)
*/
struct mtu3_ep {
struct usb_ep ep;
char name[12];
struct mtu3 *mtu;
u8 epnum;
u8 type;
u8 is_in;
u16 maxp;
int slot;
u32 fifo_size;
u32 fifo_addr;
u32 fifo_seg_size;
struct mtu3_fifo_info *fifo;
struct list_head req_list;
struct mtu3_gpd_ring gpd_ring;
const struct usb_endpoint_descriptor *desc;
int flags;
u8 wedged;
u8 busy;
};
struct mtu3_request {
struct usb_request request;
struct list_head list;
struct mtu3_ep *mep;
struct mtu3 *mtu;
struct qmu_gpd *gpd;
int epnum;
};
/**
* struct mtu3 - device driver instance data.
* @slot: MTU3_U2_IP_SLOT_DEFAULT for U2 IP
* @may_wakeup: means device's remote wakeup is enabled
* @is_self_powered: is reported in device status and the config descriptor
* @ep0_req: dummy request used while handling standard USB requests
* for GET_STATUS and SET_SEL
* @setup_buf: ep0 response buffer for GET_STATUS and SET_SEL requests
*/
struct mtu3 {
spinlock_t lock;
struct device *dev;
void __iomem *mac_base;
void __iomem *ippc_base;
struct phy *phy;
struct regulator *vusb33;
struct clk *sys_clk;
int irq;
struct mtu3_fifo_info tx_fifo;
struct mtu3_fifo_info rx_fifo;
struct mtu3_ep *ep_array;
struct mtu3_ep *in_eps;
struct mtu3_ep *out_eps;
struct mtu3_ep *ep0;
int num_eps;
int slot;
int active_ep;
struct dma_pool *qmu_gpd_pool;
enum mtu3_g_ep0_state ep0_state;
struct usb_gadget g; /* the gadget */
struct usb_gadget_driver *gadget_driver;
struct mtu3_request ep0_req;
u8 setup_buf[EP0_RESPONSE_BUF];
unsigned is_active:1;
unsigned may_wakeup:1;
unsigned is_self_powered:1;
unsigned test_mode:1;
unsigned softconnect:1;
u8 address;
u8 test_mode_nr;
u32 hw_version;
};
static inline struct mtu3 *gadget_to_mtu3(struct usb_gadget *g)
{
return container_of(g, struct mtu3, g);
}
static inline int is_first_entry(const struct list_head *list,
const struct list_head *head)
{
return list_is_last(head, list);
}
static inline struct mtu3_request *to_mtu3_request(struct usb_request *req)
{
return req ? container_of(req, struct mtu3_request, request) : NULL;
}
static inline struct mtu3_ep *to_mtu3_ep(struct usb_ep *ep)
{
return ep ? container_of(ep, struct mtu3_ep, ep) : NULL;
}
static inline struct mtu3_request *next_request(struct mtu3_ep *mep)
{
struct list_head *queue = &mep->req_list;
if (list_empty(queue))
return NULL;
return list_first_entry(queue, struct mtu3_request, list);
}
static inline void mtu3_writel(void __iomem *base, u32 offset, u32 data)
{
writel(data, base + offset);
}
static inline u32 mtu3_readl(void __iomem *base, u32 offset)
{
return readl(base + offset);
}
static inline void mtu3_setbits(void __iomem *base, u32 offset, u32 bits)
{
void __iomem *addr = base + offset;
u32 tmp = readl(addr);
writel((tmp | (bits)), addr);
}
static inline void mtu3_clrbits(void __iomem *base, u32 offset, u32 bits)
{
void __iomem *addr = base + offset;
u32 tmp = readl(addr);
writel((tmp & ~(bits)), addr);
}
int ssusb_check_clocks(struct mtu3 *mtu, u32 ex_clks);
struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
void mtu3_free_request(struct usb_ep *ep, struct usb_request *req);
void mtu3_req_complete(struct mtu3_ep *mep,
struct usb_request *req, int status);
int mtu3_config_ep(struct mtu3 *mtu, struct mtu3_ep *mep,
int interval, int burst, int mult);
void mtu3_deconfig_ep(struct mtu3 *mtu, struct mtu3_ep *mep);
void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set);
void mtu3_ep0_setup(struct mtu3 *mtu);
void mtu3_start(struct mtu3 *mtu);
void mtu3_stop(struct mtu3 *mtu);
void mtu3_hs_softconn_set(struct mtu3 *mtu, bool enable);
int mtu3_gadget_setup(struct mtu3 *mtu);
void mtu3_gadget_cleanup(struct mtu3 *mtu);
void mtu3_gadget_reset(struct mtu3 *mtu);
void mtu3_gadget_suspend(struct mtu3 *mtu);
void mtu3_gadget_resume(struct mtu3 *mtu);
void mtu3_gadget_disconnect(struct mtu3 *mtu);
int ssusb_gadget_init(struct mtu3 *mtu);
void ssusb_gadget_exit(struct mtu3 *mtu);
irqreturn_t mtu3_ep0_isr(struct mtu3 *mtu);
extern const struct usb_ep_ops mtu3_ep0_ops;
#endif