228 lines
5.6 KiB
C
228 lines
5.6 KiB
C
/*
|
|
* USB Peripheral Controller driver for Aeroflex Gaisler GRUSBDC.
|
|
*
|
|
* 2013 (c) Aeroflex Gaisler AB
|
|
*
|
|
* This driver supports GRUSBDC USB Device Controller cores available in the
|
|
* GRLIB VHDL IP core library.
|
|
*
|
|
* Full documentation of the GRUSBDC core can be found here:
|
|
* http://www.gaisler.com/products/grlib/grip.pdf
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* Contributors:
|
|
* - Andreas Larsson <andreas@gaisler.com>
|
|
* - Marko Isomaki
|
|
*/
|
|
|
|
/* Control registers on the AMBA bus */
|
|
|
|
#define GR_MAXEP 16 /* Max # endpoints for *each* direction */
|
|
|
|
struct gr_epregs {
|
|
u32 epctrl;
|
|
union {
|
|
struct { /* Slave mode*/
|
|
u32 slvctrl;
|
|
u32 slvdata;
|
|
};
|
|
struct { /* DMA mode*/
|
|
u32 dmactrl;
|
|
u32 dmaaddr;
|
|
};
|
|
};
|
|
u32 epstat;
|
|
};
|
|
|
|
struct gr_regs {
|
|
struct gr_epregs epo[GR_MAXEP]; /* 0x000 - 0x0fc */
|
|
struct gr_epregs epi[GR_MAXEP]; /* 0x100 - 0x1fc */
|
|
u32 control; /* 0x200 */
|
|
u32 status; /* 0x204 */
|
|
};
|
|
|
|
#define GR_EPCTRL_BUFSZ_SCALER 8
|
|
#define GR_EPCTRL_BUFSZ_MASK 0xffe00000
|
|
#define GR_EPCTRL_BUFSZ_POS 21
|
|
#define GR_EPCTRL_PI BIT(20)
|
|
#define GR_EPCTRL_CB BIT(19)
|
|
#define GR_EPCTRL_CS BIT(18)
|
|
#define GR_EPCTRL_MAXPL_MASK 0x0003ff80
|
|
#define GR_EPCTRL_MAXPL_POS 7
|
|
#define GR_EPCTRL_NT_MASK 0x00000060
|
|
#define GR_EPCTRL_NT_POS 5
|
|
#define GR_EPCTRL_TT_MASK 0x00000018
|
|
#define GR_EPCTRL_TT_POS 3
|
|
#define GR_EPCTRL_EH BIT(2)
|
|
#define GR_EPCTRL_ED BIT(1)
|
|
#define GR_EPCTRL_EV BIT(0)
|
|
|
|
#define GR_DMACTRL_AE BIT(10)
|
|
#define GR_DMACTRL_AD BIT(3)
|
|
#define GR_DMACTRL_AI BIT(2)
|
|
#define GR_DMACTRL_IE BIT(1)
|
|
#define GR_DMACTRL_DA BIT(0)
|
|
|
|
#define GR_EPSTAT_PT BIT(29)
|
|
#define GR_EPSTAT_PR BIT(29)
|
|
#define GR_EPSTAT_B1CNT_MASK 0x1fff0000
|
|
#define GR_EPSTAT_B1CNT_POS 16
|
|
#define GR_EPSTAT_B0CNT_MASK 0x0000fff8
|
|
#define GR_EPSTAT_B0CNT_POS 3
|
|
#define GR_EPSTAT_B1 BIT(2)
|
|
#define GR_EPSTAT_B0 BIT(1)
|
|
#define GR_EPSTAT_BS BIT(0)
|
|
|
|
#define GR_CONTROL_SI BIT(31)
|
|
#define GR_CONTROL_UI BIT(30)
|
|
#define GR_CONTROL_VI BIT(29)
|
|
#define GR_CONTROL_SP BIT(28)
|
|
#define GR_CONTROL_FI BIT(27)
|
|
#define GR_CONTROL_EP BIT(14)
|
|
#define GR_CONTROL_DH BIT(13)
|
|
#define GR_CONTROL_RW BIT(12)
|
|
#define GR_CONTROL_TS_MASK 0x00000e00
|
|
#define GR_CONTROL_TS_POS 9
|
|
#define GR_CONTROL_TM BIT(8)
|
|
#define GR_CONTROL_UA_MASK 0x000000fe
|
|
#define GR_CONTROL_UA_POS 1
|
|
#define GR_CONTROL_SU BIT(0)
|
|
|
|
#define GR_STATUS_NEPI_MASK 0xf0000000
|
|
#define GR_STATUS_NEPI_POS 28
|
|
#define GR_STATUS_NEPO_MASK 0x0f000000
|
|
#define GR_STATUS_NEPO_POS 24
|
|
#define GR_STATUS_DM BIT(23)
|
|
#define GR_STATUS_SU BIT(17)
|
|
#define GR_STATUS_UR BIT(16)
|
|
#define GR_STATUS_VB BIT(15)
|
|
#define GR_STATUS_SP BIT(14)
|
|
#define GR_STATUS_AF_MASK 0x00003800
|
|
#define GR_STATUS_AF_POS 11
|
|
#define GR_STATUS_FN_MASK 0x000007ff
|
|
#define GR_STATUS_FN_POS 0
|
|
|
|
|
|
#define MAX_CTRL_PL_SIZE 64 /* As per USB standard for full and high speed */
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* Driver data structures and utilities */
|
|
|
|
struct gr_dma_desc {
|
|
u32 ctrl;
|
|
u32 data;
|
|
u32 next;
|
|
|
|
/* These must be last because hw uses the previous three */
|
|
u32 paddr;
|
|
struct gr_dma_desc *next_desc;
|
|
};
|
|
|
|
#define GR_DESC_OUT_CTRL_SE BIT(17)
|
|
#define GR_DESC_OUT_CTRL_IE BIT(15)
|
|
#define GR_DESC_OUT_CTRL_NX BIT(14)
|
|
#define GR_DESC_OUT_CTRL_EN BIT(13)
|
|
#define GR_DESC_OUT_CTRL_LEN_MASK 0x00001fff
|
|
|
|
#define GR_DESC_IN_CTRL_MO BIT(18)
|
|
#define GR_DESC_IN_CTRL_PI BIT(17)
|
|
#define GR_DESC_IN_CTRL_ML BIT(16)
|
|
#define GR_DESC_IN_CTRL_IE BIT(15)
|
|
#define GR_DESC_IN_CTRL_NX BIT(14)
|
|
#define GR_DESC_IN_CTRL_EN BIT(13)
|
|
#define GR_DESC_IN_CTRL_LEN_MASK 0x00001fff
|
|
|
|
#define GR_DESC_DMAADDR_MASK 0xfffffffc
|
|
|
|
struct gr_ep {
|
|
struct usb_ep ep;
|
|
struct gr_udc *dev;
|
|
u16 bytes_per_buffer;
|
|
unsigned int dma_start;
|
|
struct gr_epregs __iomem *regs;
|
|
|
|
unsigned num:8;
|
|
unsigned is_in:1;
|
|
unsigned stopped:1;
|
|
unsigned wedged:1;
|
|
unsigned callback:1;
|
|
|
|
/* analogous to a host-side qh */
|
|
struct list_head queue;
|
|
|
|
struct list_head ep_list;
|
|
|
|
/* Bounce buffer for end of "odd" sized OUT requests */
|
|
void *tailbuf;
|
|
dma_addr_t tailbuf_paddr;
|
|
};
|
|
|
|
struct gr_request {
|
|
struct usb_request req;
|
|
struct list_head queue;
|
|
|
|
/* Chain of dma descriptors */
|
|
struct gr_dma_desc *first_desc; /* First in the chain */
|
|
struct gr_dma_desc *curr_desc; /* Current descriptor */
|
|
struct gr_dma_desc *last_desc; /* Last in the chain */
|
|
|
|
u16 evenlen; /* Size of even length head (if oddlen != 0) */
|
|
u16 oddlen; /* Size of odd length tail if buffer length is "odd" */
|
|
|
|
u8 setup; /* Setup packet */
|
|
};
|
|
|
|
enum gr_ep0state {
|
|
GR_EP0_DISCONNECT = 0, /* No host */
|
|
GR_EP0_SETUP, /* Between STATUS ack and SETUP report */
|
|
GR_EP0_IDATA, /* IN data stage */
|
|
GR_EP0_ODATA, /* OUT data stage */
|
|
GR_EP0_ISTATUS, /* Status stage after IN data stage */
|
|
GR_EP0_OSTATUS, /* Status stage after OUT data stage */
|
|
GR_EP0_STALL, /* Data or status stages */
|
|
GR_EP0_SUSPEND, /* USB suspend */
|
|
};
|
|
|
|
struct gr_udc {
|
|
struct usb_gadget gadget;
|
|
struct gr_ep epi[GR_MAXEP];
|
|
struct gr_ep epo[GR_MAXEP];
|
|
struct usb_gadget_driver *driver;
|
|
struct dma_pool *desc_pool;
|
|
struct device *dev;
|
|
|
|
enum gr_ep0state ep0state;
|
|
struct gr_request *ep0reqo;
|
|
struct gr_request *ep0reqi;
|
|
|
|
struct gr_regs __iomem *regs;
|
|
int irq;
|
|
int irqi;
|
|
int irqo;
|
|
|
|
unsigned added:1;
|
|
unsigned irq_enabled:1;
|
|
unsigned remote_wakeup:1;
|
|
|
|
u8 test_mode;
|
|
|
|
enum usb_device_state suspended_from;
|
|
|
|
unsigned int nepi;
|
|
unsigned int nepo;
|
|
|
|
struct list_head ep_list;
|
|
|
|
spinlock_t lock; /* General lock, a.k.a. "dev->lock" in comments */
|
|
|
|
struct dentry *dfs_root;
|
|
struct dentry *dfs_state;
|
|
};
|
|
|
|
#define to_gr_udc(gadget) (container_of((gadget), struct gr_udc, gadget))
|