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linux/drivers/usb/gadget/amd5536udc.h
Thomas Dahlmann 55d402d854 USB: amd5536 UDC driver (in GEODE southbridge) 
Driver for the AMD5536 UDC, as found in the AMD Geode CS5536 (southbridge).
This is a high speed DMA-capable controller, which can also be used in
OTG configurations (which are not supported by this patch).

Acked-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-19 17:46:05 -07:00

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/*
* amd5536.h -- header for AMD 5536 UDC high/full speed USB device controller
*
* Copyright (C) 2007 AMD (http://www.amd.com)
* Author: Thomas Dahlmann
*
* 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.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef AMD5536UDC_H
#define AMD5536UDC_H
/* various constants */
#define UDC_RDE_TIMER_SECONDS 1
#define UDC_RDE_TIMER_DIV 10
#define UDC_POLLSTALL_TIMER_USECONDS 500
/* Hs AMD5536 chip rev. */
#define UDC_HSA0_REV 1
#define UDC_HSB1_REV 2
/*
* SETUP usb commands
* needed, because some SETUP's are handled in hw, but must be passed to
* gadget driver above
* SET_CONFIG
*/
#define UDC_SETCONFIG_DWORD0 0x00000900
#define UDC_SETCONFIG_DWORD0_VALUE_MASK 0xffff0000
#define UDC_SETCONFIG_DWORD0_VALUE_OFS 16
#define UDC_SETCONFIG_DWORD1 0x00000000
/* SET_INTERFACE */
#define UDC_SETINTF_DWORD0 0x00000b00
#define UDC_SETINTF_DWORD0_ALT_MASK 0xffff0000
#define UDC_SETINTF_DWORD0_ALT_OFS 16
#define UDC_SETINTF_DWORD1 0x00000000
#define UDC_SETINTF_DWORD1_INTF_MASK 0x0000ffff
#define UDC_SETINTF_DWORD1_INTF_OFS 0
/* Mass storage reset */
#define UDC_MSCRES_DWORD0 0x0000ff21
#define UDC_MSCRES_DWORD1 0x00000000
/* Global CSR's -------------------------------------------------------------*/
#define UDC_CSR_ADDR 0x500
/* EP NE bits */
/* EP number */
#define UDC_CSR_NE_NUM_MASK 0x0000000f
#define UDC_CSR_NE_NUM_OFS 0
/* EP direction */
#define UDC_CSR_NE_DIR_MASK 0x00000010
#define UDC_CSR_NE_DIR_OFS 4
/* EP type */
#define UDC_CSR_NE_TYPE_MASK 0x00000060
#define UDC_CSR_NE_TYPE_OFS 5
/* EP config number */
#define UDC_CSR_NE_CFG_MASK 0x00000780
#define UDC_CSR_NE_CFG_OFS 7
/* EP interface number */
#define UDC_CSR_NE_INTF_MASK 0x00007800
#define UDC_CSR_NE_INTF_OFS 11
/* EP alt setting */
#define UDC_CSR_NE_ALT_MASK 0x00078000
#define UDC_CSR_NE_ALT_OFS 15
/* max pkt */
#define UDC_CSR_NE_MAX_PKT_MASK 0x3ff80000
#define UDC_CSR_NE_MAX_PKT_OFS 19
/* Device Config Register ---------------------------------------------------*/
#define UDC_DEVCFG_ADDR 0x400
#define UDC_DEVCFG_SOFTRESET 31
#define UDC_DEVCFG_HNPSFEN 30
#define UDC_DEVCFG_DMARST 29
#define UDC_DEVCFG_SET_DESC 18
#define UDC_DEVCFG_CSR_PRG 17
#define UDC_DEVCFG_STATUS 7
#define UDC_DEVCFG_DIR 6
#define UDC_DEVCFG_PI 5
#define UDC_DEVCFG_SS 4
#define UDC_DEVCFG_SP 3
#define UDC_DEVCFG_RWKP 2
#define UDC_DEVCFG_SPD_MASK 0x3
#define UDC_DEVCFG_SPD_OFS 0
#define UDC_DEVCFG_SPD_HS 0x0
#define UDC_DEVCFG_SPD_FS 0x1
#define UDC_DEVCFG_SPD_LS 0x2
/*#define UDC_DEVCFG_SPD_FS 0x3*/
/* Device Control Register --------------------------------------------------*/
#define UDC_DEVCTL_ADDR 0x404
#define UDC_DEVCTL_THLEN_MASK 0xff000000
#define UDC_DEVCTL_THLEN_OFS 24
#define UDC_DEVCTL_BRLEN_MASK 0x00ff0000
#define UDC_DEVCTL_BRLEN_OFS 16
#define UDC_DEVCTL_CSR_DONE 13
#define UDC_DEVCTL_DEVNAK 12
#define UDC_DEVCTL_SD 10
#define UDC_DEVCTL_MODE 9
#define UDC_DEVCTL_BREN 8
#define UDC_DEVCTL_THE 7
#define UDC_DEVCTL_BF 6
#define UDC_DEVCTL_BE 5
#define UDC_DEVCTL_DU 4
#define UDC_DEVCTL_TDE 3
#define UDC_DEVCTL_RDE 2
#define UDC_DEVCTL_RES 0
/* Device Status Register ---------------------------------------------------*/
#define UDC_DEVSTS_ADDR 0x408
#define UDC_DEVSTS_TS_MASK 0xfffc0000
#define UDC_DEVSTS_TS_OFS 18
#define UDC_DEVSTS_SESSVLD 17
#define UDC_DEVSTS_PHY_ERROR 16
#define UDC_DEVSTS_RXFIFO_EMPTY 15
#define UDC_DEVSTS_ENUM_SPEED_MASK 0x00006000
#define UDC_DEVSTS_ENUM_SPEED_OFS 13
#define UDC_DEVSTS_ENUM_SPEED_FULL 1
#define UDC_DEVSTS_ENUM_SPEED_HIGH 0
#define UDC_DEVSTS_SUSP 12
#define UDC_DEVSTS_ALT_MASK 0x00000f00
#define UDC_DEVSTS_ALT_OFS 8
#define UDC_DEVSTS_INTF_MASK 0x000000f0
#define UDC_DEVSTS_INTF_OFS 4
#define UDC_DEVSTS_CFG_MASK 0x0000000f
#define UDC_DEVSTS_CFG_OFS 0
/* Device Interrupt Register ------------------------------------------------*/
#define UDC_DEVINT_ADDR 0x40c
#define UDC_DEVINT_SVC 7
#define UDC_DEVINT_ENUM 6
#define UDC_DEVINT_SOF 5
#define UDC_DEVINT_US 4
#define UDC_DEVINT_UR 3
#define UDC_DEVINT_ES 2
#define UDC_DEVINT_SI 1
#define UDC_DEVINT_SC 0
/* Device Interrupt Mask Register -------------------------------------------*/
#define UDC_DEVINT_MSK_ADDR 0x410
#define UDC_DEVINT_MSK 0x7f
/* Endpoint Interrupt Register ----------------------------------------------*/
#define UDC_EPINT_ADDR 0x414
#define UDC_EPINT_OUT_MASK 0xffff0000
#define UDC_EPINT_OUT_OFS 16
#define UDC_EPINT_IN_MASK 0x0000ffff
#define UDC_EPINT_IN_OFS 0
#define UDC_EPINT_IN_EP0 0
#define UDC_EPINT_IN_EP1 1
#define UDC_EPINT_IN_EP2 2
#define UDC_EPINT_IN_EP3 3
#define UDC_EPINT_OUT_EP0 16
#define UDC_EPINT_OUT_EP1 17
#define UDC_EPINT_OUT_EP2 18
#define UDC_EPINT_OUT_EP3 19
#define UDC_EPINT_EP0_ENABLE_MSK 0x001e001e
/* Endpoint Interrupt Mask Register -----------------------------------------*/
#define UDC_EPINT_MSK_ADDR 0x418
#define UDC_EPINT_OUT_MSK_MASK 0xffff0000
#define UDC_EPINT_OUT_MSK_OFS 16
#define UDC_EPINT_IN_MSK_MASK 0x0000ffff
#define UDC_EPINT_IN_MSK_OFS 0
#define UDC_EPINT_MSK_DISABLE_ALL 0xffffffff
/* mask non-EP0 endpoints */
#define UDC_EPDATAINT_MSK_DISABLE 0xfffefffe
/* mask all dev interrupts */
#define UDC_DEV_MSK_DISABLE 0x7f
/* Endpoint-specific CSR's --------------------------------------------------*/
#define UDC_EPREGS_ADDR 0x0
#define UDC_EPIN_REGS_ADDR 0x0
#define UDC_EPOUT_REGS_ADDR 0x200
#define UDC_EPCTL_ADDR 0x0
#define UDC_EPCTL_RRDY 9
#define UDC_EPCTL_CNAK 8
#define UDC_EPCTL_SNAK 7
#define UDC_EPCTL_NAK 6
#define UDC_EPCTL_ET_MASK 0x00000030
#define UDC_EPCTL_ET_OFS 4
#define UDC_EPCTL_ET_CONTROL 0
#define UDC_EPCTL_ET_ISO 1
#define UDC_EPCTL_ET_BULK 2
#define UDC_EPCTL_ET_INTERRUPT 3
#define UDC_EPCTL_P 3
#define UDC_EPCTL_SN 2
#define UDC_EPCTL_F 1
#define UDC_EPCTL_S 0
/* Endpoint Status Registers ------------------------------------------------*/
#define UDC_EPSTS_ADDR 0x4
#define UDC_EPSTS_RX_PKT_SIZE_MASK 0x007ff800
#define UDC_EPSTS_RX_PKT_SIZE_OFS 11
#define UDC_EPSTS_TDC 10
#define UDC_EPSTS_HE 9
#define UDC_EPSTS_BNA 7
#define UDC_EPSTS_IN 6
#define UDC_EPSTS_OUT_MASK 0x00000030
#define UDC_EPSTS_OUT_OFS 4
#define UDC_EPSTS_OUT_DATA 1
#define UDC_EPSTS_OUT_DATA_CLEAR 0x10
#define UDC_EPSTS_OUT_SETUP 2
#define UDC_EPSTS_OUT_SETUP_CLEAR 0x20
#define UDC_EPSTS_OUT_CLEAR 0x30
/* Endpoint Buffer Size IN/ Receive Packet Frame Number OUT Registers ------*/
#define UDC_EPIN_BUFF_SIZE_ADDR 0x8
#define UDC_EPOUT_FRAME_NUMBER_ADDR 0x8
#define UDC_EPIN_BUFF_SIZE_MASK 0x0000ffff
#define UDC_EPIN_BUFF_SIZE_OFS 0
/* EP0in txfifo = 128 bytes*/
#define UDC_EPIN0_BUFF_SIZE 32
/* EP0in fullspeed txfifo = 128 bytes*/
#define UDC_FS_EPIN0_BUFF_SIZE 32
/* fifo size mult = fifo size / max packet */
#define UDC_EPIN_BUFF_SIZE_MULT 2
/* EPin data fifo size = 1024 bytes DOUBLE BUFFERING */
#define UDC_EPIN_BUFF_SIZE 256
/* EPin small INT data fifo size = 128 bytes */
#define UDC_EPIN_SMALLINT_BUFF_SIZE 32
/* EPin fullspeed data fifo size = 128 bytes DOUBLE BUFFERING */
#define UDC_FS_EPIN_BUFF_SIZE 32
#define UDC_EPOUT_FRAME_NUMBER_MASK 0x0000ffff
#define UDC_EPOUT_FRAME_NUMBER_OFS 0
/* Endpoint Buffer Size OUT/Max Packet Size Registers -----------------------*/
#define UDC_EPOUT_BUFF_SIZE_ADDR 0x0c
#define UDC_EP_MAX_PKT_SIZE_ADDR 0x0c
#define UDC_EPOUT_BUFF_SIZE_MASK 0xffff0000
#define UDC_EPOUT_BUFF_SIZE_OFS 16
#define UDC_EP_MAX_PKT_SIZE_MASK 0x0000ffff
#define UDC_EP_MAX_PKT_SIZE_OFS 0
/* EP0in max packet size = 64 bytes */
#define UDC_EP0IN_MAX_PKT_SIZE 64
/* EP0out max packet size = 64 bytes */
#define UDC_EP0OUT_MAX_PKT_SIZE 64
/* EP0in fullspeed max packet size = 64 bytes */
#define UDC_FS_EP0IN_MAX_PKT_SIZE 64
/* EP0out fullspeed max packet size = 64 bytes */
#define UDC_FS_EP0OUT_MAX_PKT_SIZE 64
/*
* Endpoint dma descriptors ------------------------------------------------
*
* Setup data, Status dword
*/
#define UDC_DMA_STP_STS_CFG_MASK 0x0fff0000
#define UDC_DMA_STP_STS_CFG_OFS 16
#define UDC_DMA_STP_STS_CFG_ALT_MASK 0x000f0000
#define UDC_DMA_STP_STS_CFG_ALT_OFS 16
#define UDC_DMA_STP_STS_CFG_INTF_MASK 0x00f00000
#define UDC_DMA_STP_STS_CFG_INTF_OFS 20
#define UDC_DMA_STP_STS_CFG_NUM_MASK 0x0f000000
#define UDC_DMA_STP_STS_CFG_NUM_OFS 24
#define UDC_DMA_STP_STS_RX_MASK 0x30000000
#define UDC_DMA_STP_STS_RX_OFS 28
#define UDC_DMA_STP_STS_BS_MASK 0xc0000000
#define UDC_DMA_STP_STS_BS_OFS 30
#define UDC_DMA_STP_STS_BS_HOST_READY 0
#define UDC_DMA_STP_STS_BS_DMA_BUSY 1
#define UDC_DMA_STP_STS_BS_DMA_DONE 2
#define UDC_DMA_STP_STS_BS_HOST_BUSY 3
/* IN data, Status dword */
#define UDC_DMA_IN_STS_TXBYTES_MASK 0x0000ffff
#define UDC_DMA_IN_STS_TXBYTES_OFS 0
#define UDC_DMA_IN_STS_FRAMENUM_MASK 0x07ff0000
#define UDC_DMA_IN_STS_FRAMENUM_OFS 0
#define UDC_DMA_IN_STS_L 27
#define UDC_DMA_IN_STS_TX_MASK 0x30000000
#define UDC_DMA_IN_STS_TX_OFS 28
#define UDC_DMA_IN_STS_BS_MASK 0xc0000000
#define UDC_DMA_IN_STS_BS_OFS 30
#define UDC_DMA_IN_STS_BS_HOST_READY 0
#define UDC_DMA_IN_STS_BS_DMA_BUSY 1
#define UDC_DMA_IN_STS_BS_DMA_DONE 2
#define UDC_DMA_IN_STS_BS_HOST_BUSY 3
/* OUT data, Status dword */
#define UDC_DMA_OUT_STS_RXBYTES_MASK 0x0000ffff
#define UDC_DMA_OUT_STS_RXBYTES_OFS 0
#define UDC_DMA_OUT_STS_FRAMENUM_MASK 0x07ff0000
#define UDC_DMA_OUT_STS_FRAMENUM_OFS 0
#define UDC_DMA_OUT_STS_L 27
#define UDC_DMA_OUT_STS_RX_MASK 0x30000000
#define UDC_DMA_OUT_STS_RX_OFS 28
#define UDC_DMA_OUT_STS_BS_MASK 0xc0000000
#define UDC_DMA_OUT_STS_BS_OFS 30
#define UDC_DMA_OUT_STS_BS_HOST_READY 0
#define UDC_DMA_OUT_STS_BS_DMA_BUSY 1
#define UDC_DMA_OUT_STS_BS_DMA_DONE 2
#define UDC_DMA_OUT_STS_BS_HOST_BUSY 3
/* max ep0in packet */
#define UDC_EP0IN_MAXPACKET 1000
/* max dma packet */
#define UDC_DMA_MAXPACKET 65536
/* un-usable DMA address */
#define DMA_DONT_USE (~(dma_addr_t) 0 )
/* other Endpoint register addresses and values-----------------------------*/
#define UDC_EP_SUBPTR_ADDR 0x10
#define UDC_EP_DESPTR_ADDR 0x14
#define UDC_EP_WRITE_CONFIRM_ADDR 0x1c
/* EP number as layouted in AHB space */
#define UDC_EP_NUM 32
#define UDC_EPIN_NUM 16
#define UDC_EPIN_NUM_USED 5
#define UDC_EPOUT_NUM 16
/* EP number of EP's really used = EP0 + 8 data EP's */
#define UDC_USED_EP_NUM 9
/* UDC CSR regs are aligned but AHB regs not - offset for OUT EP's */
#define UDC_CSR_EP_OUT_IX_OFS 12
#define UDC_EP0OUT_IX 16
#define UDC_EP0IN_IX 0
/* Rx fifo address and size = 1k -------------------------------------------*/
#define UDC_RXFIFO_ADDR 0x800
#define UDC_RXFIFO_SIZE 0x400
/* Tx fifo address and size = 1.5k -----------------------------------------*/
#define UDC_TXFIFO_ADDR 0xc00
#define UDC_TXFIFO_SIZE 0x600
/* default data endpoints --------------------------------------------------*/
#define UDC_EPIN_STATUS_IX 1
#define UDC_EPIN_IX 2
#define UDC_EPOUT_IX 18
/* general constants -------------------------------------------------------*/
#define UDC_DWORD_BYTES 4
#define UDC_BITS_PER_BYTE_SHIFT 3
#define UDC_BYTE_MASK 0xff
#define UDC_BITS_PER_BYTE 8
/*---------------------------------------------------------------------------*/
/* UDC CSR's */
struct udc_csrs {
/* sca - setup command address */
u32 sca;
/* ep ne's */
u32 ne[UDC_USED_EP_NUM];
} __attribute__ ((packed));
/* AHB subsystem CSR registers */
struct udc_regs {
/* device configuration */
u32 cfg;
/* device control */
u32 ctl;
/* device status */
u32 sts;
/* device interrupt */
u32 irqsts;
/* device interrupt mask */
u32 irqmsk;
/* endpoint interrupt */
u32 ep_irqsts;
/* endpoint interrupt mask */
u32 ep_irqmsk;
} __attribute__ ((packed));
/* endpoint specific registers */
struct udc_ep_regs {
/* endpoint control */
u32 ctl;
/* endpoint status */
u32 sts;
/* endpoint buffer size in/ receive packet frame number out */
u32 bufin_framenum;
/* endpoint buffer size out/max packet size */
u32 bufout_maxpkt;
/* endpoint setup buffer pointer */
u32 subptr;
/* endpoint data descriptor pointer */
u32 desptr;
/* reserverd */
u32 reserved;
/* write/read confirmation */
u32 confirm;
} __attribute__ ((packed));
/* control data DMA desc */
struct udc_stp_dma {
/* status quadlet */
u32 status;
/* reserved */
u32 _reserved;
/* first setup word */
u32 data12;
/* second setup word */
u32 data34;
} __attribute__ ((aligned (16)));
/* normal data DMA desc */
struct udc_data_dma {
/* status quadlet */
u32 status;
/* reserved */
u32 _reserved;
/* buffer pointer */
u32 bufptr;
/* next descriptor pointer */
u32 next;
} __attribute__ ((aligned (16)));
/* request packet */
struct udc_request {
/* embedded gadget ep */
struct usb_request req;
/* flags */
unsigned dma_going : 1,
dma_mapping : 1,
dma_done : 1;
/* phys. address */
dma_addr_t td_phys;
/* first dma desc. of chain */
struct udc_data_dma *td_data;
/* last dma desc. of chain */
struct udc_data_dma *td_data_last;
struct list_head queue;
/* chain length */
unsigned chain_len;
};
/* UDC specific endpoint parameters */
struct udc_ep {
struct usb_ep ep;
struct udc_ep_regs __iomem *regs;
u32 __iomem *txfifo;
u32 __iomem *dma;
dma_addr_t td_phys;
dma_addr_t td_stp_dma;
struct udc_stp_dma *td_stp;
struct udc_data_dma *td;
/* temp request */
struct udc_request *req;
unsigned req_used;
unsigned req_completed;
/* dummy DMA desc for BNA dummy */
struct udc_request *bna_dummy_req;
unsigned bna_occurred;
/* NAK state */
unsigned naking;
struct udc *dev;
/* queue for requests */
struct list_head queue;
const struct usb_endpoint_descriptor *desc;
unsigned halted;
unsigned cancel_transfer;
unsigned num : 5,
fifo_depth : 14,
in : 1;
};
/* device struct */
struct udc {
struct usb_gadget gadget;
spinlock_t lock; /* protects all state */
/* all endpoints */
struct udc_ep ep[UDC_EP_NUM];
struct usb_gadget_driver *driver;
/* operational flags */
unsigned active : 1,
stall_ep0in : 1,
waiting_zlp_ack_ep0in : 1,
set_cfg_not_acked : 1,
irq_registered : 1,
data_ep_enabled : 1,
data_ep_queued : 1,
mem_region : 1,
sys_suspended : 1,
connected;
u16 chiprev;
/* registers */
struct pci_dev *pdev;
struct udc_csrs __iomem *csr;
struct udc_regs __iomem *regs;
struct udc_ep_regs __iomem *ep_regs;
u32 __iomem *rxfifo;
u32 __iomem *txfifo;
/* DMA desc pools */
struct pci_pool *data_requests;
struct pci_pool *stp_requests;
/* device data */
unsigned long phys_addr;
void __iomem *virt_addr;
unsigned irq;
/* states */
u16 cur_config;
u16 cur_intf;
u16 cur_alt;
};
/* setup request data */
union udc_setup_data {
u32 data[2];
struct usb_ctrlrequest request;
};
/*
*---------------------------------------------------------------------------
* SET and GET bitfields in u32 values
* via constants for mask/offset:
* <bit_field_stub_name> is the text between
* UDC_ and _MASK|_OFS of appropiate
* constant
*
* set bitfield value in u32 u32Val
*/
#define AMD_ADDBITS(u32Val, bitfield_val, bitfield_stub_name) \
(((u32Val) & (((u32) ~((u32) bitfield_stub_name##_MASK)))) \
| (((bitfield_val) << ((u32) bitfield_stub_name##_OFS)) \
& ((u32) bitfield_stub_name##_MASK)))
/*
* set bitfield value in zero-initialized u32 u32Val
* => bitfield bits in u32Val are all zero
*/
#define AMD_INIT_SETBITS(u32Val, bitfield_val, bitfield_stub_name) \
((u32Val) \
| (((bitfield_val) << ((u32) bitfield_stub_name##_OFS)) \
& ((u32) bitfield_stub_name##_MASK)))
/* get bitfield value from u32 u32Val */
#define AMD_GETBITS(u32Val, bitfield_stub_name) \
((u32Val & ((u32) bitfield_stub_name##_MASK)) \
>> ((u32) bitfield_stub_name##_OFS))
/* SET and GET bits in u32 values ------------------------------------------*/
#define AMD_BIT(bit_stub_name) (1 << bit_stub_name)
#define AMD_UNMASK_BIT(bit_stub_name) (~AMD_BIT(bit_stub_name))
#define AMD_CLEAR_BIT(bit_stub_name) (~AMD_BIT(bit_stub_name))
/* debug macros ------------------------------------------------------------*/
#define DBG(udc , args...) dev_dbg(&(udc)->pdev->dev, args)
#ifdef UDC_VERBOSE
#define VDBG DBG
#else
#define VDBG(udc , args...) do {} while (0)
#endif
#endif /* #ifdef AMD5536UDC_H */
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