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linux/drivers/net/usb/smsc95xx.h
Martin Wetterwald 53a759c89b smsc95xx: Add comments to the registers definition 
This chip is used by a lot of embedded devices and also by the Raspberry
Pi 1, 2 & 3 which were created to promote the study of computer
sciences. Students wanting to learn kernel / network device driver
programming through those devices can only rely on the Linux kernel
driver source to make their own.

This commit adds a lot of comments to the registers definition to expand
the register names.

Cc: Steve Glendinning <steve.glendinning@shawell.net>
Cc: Microchip Linux Driver Support <UNGLinuxDriver@microchip.com>
CC: David Miller <davem@davemloft.net>
Signed-off-by: Martin Wetterwald <martin@wetterwald.eu>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Steve Glendinning <steve.glendinning@shawell.net>
Acked-by: Woojung Huh <Woojung.Huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-17 13:04:52 -04:00

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/***************************************************************************
*
* Copyright (C) 2007-2008 SMSC
*
* 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, see <http://www.gnu.org/licenses/>.
*
*****************************************************************************/
#ifndef _SMSC95XX_H
#define _SMSC95XX_H
/* Tx command words */
#define TX_CMD_A_DATA_OFFSET_ (0x001F0000) /* Data Start Offset */
#define TX_CMD_A_FIRST_SEG_ (0x00002000) /* First Segment */
#define TX_CMD_A_LAST_SEG_ (0x00001000) /* Last Segment */
#define TX_CMD_A_BUF_SIZE_ (0x000007FF) /* Buffer Size */
#define TX_CMD_B_CSUM_ENABLE (0x00004000) /* TX Checksum Enable */
#define TX_CMD_B_ADD_CRC_DIS_ (0x00002000) /* Add CRC Disable */
#define TX_CMD_B_DIS_PADDING_ (0x00001000) /* Disable Frame Padding */
#define TX_CMD_B_FRAME_LENGTH_ (0x000007FF) /* Frame Length (bytes) */
/* Rx status word */
#define RX_STS_FF_ (0x40000000) /* Filter Fail */
#define RX_STS_FL_ (0x3FFF0000) /* Frame Length */
#define RX_STS_ES_ (0x00008000) /* Error Summary */
#define RX_STS_BF_ (0x00002000) /* Broadcast Frame */
#define RX_STS_LE_ (0x00001000) /* Length Error */
#define RX_STS_RF_ (0x00000800) /* Runt Frame */
#define RX_STS_MF_ (0x00000400) /* Multicast Frame */
#define RX_STS_TL_ (0x00000080) /* Frame too long */
#define RX_STS_CS_ (0x00000040) /* Collision Seen */
#define RX_STS_FT_ (0x00000020) /* Frame Type */
#define RX_STS_RW_ (0x00000010) /* Receive Watchdog */
#define RX_STS_ME_ (0x00000008) /* MII Error */
#define RX_STS_DB_ (0x00000004) /* Dribbling */
#define RX_STS_CRC_ (0x00000002) /* CRC Error */
/* SCSRs - System Control and Status Registers */
/* Device ID and Revision Register */
#define ID_REV (0x00)
#define ID_REV_CHIP_ID_MASK_ (0xFFFF0000)
#define ID_REV_CHIP_REV_MASK_ (0x0000FFFF)
#define ID_REV_CHIP_ID_9500_ (0x9500)
#define ID_REV_CHIP_ID_9500A_ (0x9E00)
#define ID_REV_CHIP_ID_9512_ (0xEC00)
#define ID_REV_CHIP_ID_9530_ (0x9530)
#define ID_REV_CHIP_ID_89530_ (0x9E08)
#define ID_REV_CHIP_ID_9730_ (0x9730)
/* Interrupt Status Register */
#define INT_STS (0x08)
#define INT_STS_MAC_RTO_ (0x00040000) /* MAC Reset Time Out */
#define INT_STS_TX_STOP_ (0x00020000) /* TX Stopped */
#define INT_STS_RX_STOP_ (0x00010000) /* RX Stopped */
#define INT_STS_PHY_INT_ (0x00008000) /* PHY Interrupt */
#define INT_STS_TXE_ (0x00004000) /* Transmitter Error */
#define INT_STS_TDFU_ (0x00002000) /* TX Data FIFO Underrun */
#define INT_STS_TDFO_ (0x00001000) /* TX Data FIFO Overrun */
#define INT_STS_RXDF_ (0x00000800) /* RX Dropped Frame */
#define INT_STS_GPIOS_ (0x000007FF) /* GPIOs Interrupts */
#define INT_STS_CLEAR_ALL_ (0xFFFFFFFF)
/* Receive Configuration Register */
#define RX_CFG (0x0C)
#define RX_FIFO_FLUSH_ (0x00000001) /* Receive FIFO Flush */
/* Transmit Configuration Register */
#define TX_CFG (0x10)
#define TX_CFG_ON_ (0x00000004) /* Transmitter Enable */
#define TX_CFG_STOP_ (0x00000002) /* Stop Transmitter */
#define TX_CFG_FIFO_FLUSH_ (0x00000001) /* Transmit FIFO Flush */
/* Hardware Configuration Register */
#define HW_CFG (0x14)
#define HW_CFG_BIR_ (0x00001000) /* Bulk In Empty Response */
#define HW_CFG_LEDB_ (0x00000800) /* Activity LED 80ms Bypass */
#define HW_CFG_RXDOFF_ (0x00000600) /* RX Data Offset */
#define HW_CFG_SBP_ (0x00000100) /* Stall Bulk Out Pipe Dis. */
#define HW_CFG_IME_ (0x00000080) /* Internal MII Visi. Enable */
#define HW_CFG_DRP_ (0x00000040) /* Discard Errored RX Frame */
#define HW_CFG_MEF_ (0x00000020) /* Mult. ETH Frames/USB pkt */
#define HW_CFG_ETC_ (0x00000010) /* EEPROM Timeout Control */
#define HW_CFG_LRST_ (0x00000008) /* Soft Lite Reset */
#define HW_CFG_PSEL_ (0x00000004) /* External PHY Select */
#define HW_CFG_BCE_ (0x00000002) /* Burst Cap Enable */
#define HW_CFG_SRST_ (0x00000001) /* Soft Reset */
/* Receive FIFO Information Register */
#define RX_FIFO_INF (0x18)
#define RX_FIFO_INF_USED_ (0x0000FFFF) /* RX Data FIFO Used Space */
/* Transmit FIFO Information Register */
#define TX_FIFO_INF (0x1C)
#define TX_FIFO_INF_FREE_ (0x0000FFFF) /* TX Data FIFO Free Space */
/* Power Management Control Register */
#define PM_CTRL (0x20)
#define PM_CTL_RES_CLR_WKP_STS (0x00000200) /* Resume Clears Wakeup STS */
#define PM_CTL_RES_CLR_WKP_EN (0x00000100) /* Resume Clears Wkp Enables */
#define PM_CTL_DEV_RDY_ (0x00000080) /* Device Ready */
#define PM_CTL_SUS_MODE_ (0x00000060) /* Suspend Mode */
#define PM_CTL_SUS_MODE_0 (0x00000000)
#define PM_CTL_SUS_MODE_1 (0x00000020)
#define PM_CTL_SUS_MODE_2 (0x00000040)
#define PM_CTL_SUS_MODE_3 (0x00000060)
#define PM_CTL_PHY_RST_ (0x00000010) /* PHY Reset */
#define PM_CTL_WOL_EN_ (0x00000008) /* Wake On Lan Enable */
#define PM_CTL_ED_EN_ (0x00000004) /* Energy Detect Enable */
#define PM_CTL_WUPS_ (0x00000003) /* Wake Up Status */
#define PM_CTL_WUPS_NO_ (0x00000000) /* No Wake Up Event Detected */
#define PM_CTL_WUPS_ED_ (0x00000001) /* Energy Detect */
#define PM_CTL_WUPS_WOL_ (0x00000002) /* Wake On Lan */
#define PM_CTL_WUPS_MULTI_ (0x00000003) /* Multiple Events Occurred */
/* LED General Purpose IO Configuration Register */
#define LED_GPIO_CFG (0x24)
#define LED_GPIO_CFG_SPD_LED (0x01000000) /* GPIOz as Speed LED */
#define LED_GPIO_CFG_LNK_LED (0x00100000) /* GPIOy as Link LED */
#define LED_GPIO_CFG_FDX_LED (0x00010000) /* GPIOx as Full Duplex LED */
/* General Purpose IO Configuration Register */
#define GPIO_CFG (0x28)
/* Automatic Flow Control Configuration Register */
#define AFC_CFG (0x2C)
#define AFC_CFG_HI_ (0x00FF0000) /* Auto Flow Ctrl High Level */
#define AFC_CFG_LO_ (0x0000FF00) /* Auto Flow Ctrl Low Level */
#define AFC_CFG_BACK_DUR_ (0x000000F0) /* Back Pressure Duration */
#define AFC_CFG_FC_MULT_ (0x00000008) /* Flow Ctrl on Mcast Frame */
#define AFC_CFG_FC_BRD_ (0x00000004) /* Flow Ctrl on Bcast Frame */
#define AFC_CFG_FC_ADD_ (0x00000002) /* Flow Ctrl on Addr. Decode */
#define AFC_CFG_FC_ANY_ (0x00000001) /* Flow Ctrl on Any Frame */
/* Hi watermark = 15.5Kb (~10 mtu pkts) */
/* low watermark = 3k (~2 mtu pkts) */
/* backpressure duration = ~ 350us */
/* Apply FC on any frame. */
#define AFC_CFG_DEFAULT (0x00F830A1)
/* EEPROM Command Register */
#define E2P_CMD (0x30)
#define E2P_CMD_BUSY_ (0x80000000) /* E2P Controller Busy */
#define E2P_CMD_MASK_ (0x70000000) /* Command Mask (see below) */
#define E2P_CMD_READ_ (0x00000000) /* Read Location */
#define E2P_CMD_EWDS_ (0x10000000) /* Erase/Write Disable */
#define E2P_CMD_EWEN_ (0x20000000) /* Erase/Write Enable */
#define E2P_CMD_WRITE_ (0x30000000) /* Write Location */
#define E2P_CMD_WRAL_ (0x40000000) /* Write All */
#define E2P_CMD_ERASE_ (0x50000000) /* Erase Location */
#define E2P_CMD_ERAL_ (0x60000000) /* Erase All */
#define E2P_CMD_RELOAD_ (0x70000000) /* Data Reload */
#define E2P_CMD_TIMEOUT_ (0x00000400) /* Set if no resp within 30ms */
#define E2P_CMD_LOADED_ (0x00000200) /* Valid EEPROM found */
#define E2P_CMD_ADDR_ (0x000001FF) /* Byte aligned address */
#define MAX_EEPROM_SIZE (512)
/* EEPROM Data Register */
#define E2P_DATA (0x34)
#define E2P_DATA_MASK_ (0x000000FF) /* EEPROM Data Mask */
/* Burst Cap Register */
#define BURST_CAP (0x38)
#define BURST_CAP_MASK_ (0x000000FF) /* Max burst sent by the UTX */
/* Configuration Straps Status Register */
#define STRAP_STATUS (0x3C)
#define STRAP_STATUS_PWR_SEL_ (0x00000020) /* Device self-powered */
#define STRAP_STATUS_AMDIX_EN_ (0x00000010) /* Auto-MDIX Enabled */
#define STRAP_STATUS_PORT_SWAP_ (0x00000008) /* USBD+/USBD- Swapped */
#define STRAP_STATUS_EEP_SIZE_ (0x00000004) /* EEPROM Size */
#define STRAP_STATUS_RMT_WKP_ (0x00000002) /* Remote Wkp supported */
#define STRAP_STATUS_EEP_DISABLE_ (0x00000001) /* EEPROM Disabled */
/* Data Port Select Register */
#define DP_SEL (0x40)
/* Data Port Command Register */
#define DP_CMD (0x44)
/* Data Port Address Register */
#define DP_ADDR (0x48)
/* Data Port Data 0 Register */
#define DP_DATA0 (0x4C)
/* Data Port Data 1 Register */
#define DP_DATA1 (0x50)
/* General Purpose IO Wake Enable and Polarity Register */
#define GPIO_WAKE (0x64)
/* Interrupt Endpoint Control Register */
#define INT_EP_CTL (0x68)
#define INT_EP_CTL_INTEP_ (0x80000000) /* Always TX Interrupt PKT */
#define INT_EP_CTL_MAC_RTO_ (0x00080000) /* MAC Reset Time Out */
#define INT_EP_CTL_RX_FIFO_ (0x00040000) /* RX FIFO Has Frame */
#define INT_EP_CTL_TX_STOP_ (0x00020000) /* TX Stopped */
#define INT_EP_CTL_RX_STOP_ (0x00010000) /* RX Stopped */
#define INT_EP_CTL_PHY_INT_ (0x00008000) /* PHY Interrupt */
#define INT_EP_CTL_TXE_ (0x00004000) /* TX Error */
#define INT_EP_CTL_TDFU_ (0x00002000) /* TX Data FIFO Underrun */
#define INT_EP_CTL_TDFO_ (0x00001000) /* TX Data FIFO Overrun */
#define INT_EP_CTL_RXDF_ (0x00000800) /* RX Dropped Frame */
#define INT_EP_CTL_GPIOS_ (0x000007FF) /* GPIOs Interrupt Enable */
/* Bulk In Delay Register (units of 16.667ns, until ~1092µs) */
#define BULK_IN_DLY (0x6C)
/* MAC CSRs - MAC Control and Status Registers */
/* MAC Control Register */
#define MAC_CR (0x100)
#define MAC_CR_RXALL_ (0x80000000) /* Receive All Mode */
#define MAC_CR_RCVOWN_ (0x00800000) /* Disable Receive Own */
#define MAC_CR_LOOPBK_ (0x00200000) /* Loopback Operation Mode */
#define MAC_CR_FDPX_ (0x00100000) /* Full Duplex Mode */
#define MAC_CR_MCPAS_ (0x00080000) /* Pass All Multicast */
#define MAC_CR_PRMS_ (0x00040000) /* Promiscuous Mode */
#define MAC_CR_INVFILT_ (0x00020000) /* Inverse Filtering */
#define MAC_CR_PASSBAD_ (0x00010000) /* Pass Bad Frames */
#define MAC_CR_HFILT_ (0x00008000) /* Hash Only Filtering Mode */
#define MAC_CR_HPFILT_ (0x00002000) /* Hash/Perfect Filt. Mode */
#define MAC_CR_LCOLL_ (0x00001000) /* Late Collision Control */
#define MAC_CR_BCAST_ (0x00000800) /* Disable Broadcast Frames */
#define MAC_CR_DISRTY_ (0x00000400) /* Disable Retry */
#define MAC_CR_PADSTR_ (0x00000100) /* Automatic Pad Stripping */
#define MAC_CR_BOLMT_MASK (0x000000C0) /* BackOff Limit */
#define MAC_CR_DFCHK_ (0x00000020) /* Deferral Check */
#define MAC_CR_TXEN_ (0x00000008) /* Transmitter Enable */
#define MAC_CR_RXEN_ (0x00000004) /* Receiver Enable */
/* MAC Address High Register */
#define ADDRH (0x104)
/* MAC Address Low Register */
#define ADDRL (0x108)
/* Multicast Hash Table High Register */
#define HASHH (0x10C)
/* Multicast Hash Table Low Register */
#define HASHL (0x110)
/* MII Access Register */
#define MII_ADDR (0x114)
#define MII_WRITE_ (0x02)
#define MII_BUSY_ (0x01)
#define MII_READ_ (0x00) /* ~of MII Write bit */
/* MII Data Register */
#define MII_DATA (0x118)
/* Flow Control Register */
#define FLOW (0x11C)
#define FLOW_FCPT_ (0xFFFF0000) /* Pause Time */
#define FLOW_FCPASS_ (0x00000004) /* Pass Control Frames */
#define FLOW_FCEN_ (0x00000002) /* Flow Control Enable */
#define FLOW_FCBSY_ (0x00000001) /* Flow Control Busy */
/* VLAN1 Tag Register */
#define VLAN1 (0x120)
/* VLAN2 Tag Register */
#define VLAN2 (0x124)
/* Wake Up Frame Filter Register */
#define WUFF (0x128)
#define LAN9500_WUFF_NUM (4)
#define LAN9500A_WUFF_NUM (8)
/* Wake Up Control and Status Register */
#define WUCSR (0x12C)
#define WUCSR_WFF_PTR_RST_ (0x80000000) /* WFrame Filter Pointer Rst */
#define WUCSR_GUE_ (0x00000200) /* Global Unicast Enable */
#define WUCSR_WUFR_ (0x00000040) /* Wakeup Frame Received */
#define WUCSR_MPR_ (0x00000020) /* Magic Packet Received */
#define WUCSR_WAKE_EN_ (0x00000004) /* Wakeup Frame Enable */
#define WUCSR_MPEN_ (0x00000002) /* Magic Packet Enable */
/* Checksum Offload Engine Control Register */
#define COE_CR (0x130)
#define Tx_COE_EN_ (0x00010000) /* TX Csum Offload Enable */
#define Rx_COE_MODE_ (0x00000002) /* RX Csum Offload Mode */
#define Rx_COE_EN_ (0x00000001) /* RX Csum Offload Enable */
/* Vendor-specific PHY Definitions (via MII access) */
/* EDPD NLP / crossover time configuration (LAN9500A only) */
#define PHY_EDPD_CONFIG (16)
#define PHY_EDPD_CONFIG_TX_NLP_EN_ ((u16)0x8000)
#define PHY_EDPD_CONFIG_TX_NLP_1000_ ((u16)0x0000)
#define PHY_EDPD_CONFIG_TX_NLP_768_ ((u16)0x2000)
#define PHY_EDPD_CONFIG_TX_NLP_512_ ((u16)0x4000)
#define PHY_EDPD_CONFIG_TX_NLP_256_ ((u16)0x6000)
#define PHY_EDPD_CONFIG_RX_1_NLP_ ((u16)0x1000)
#define PHY_EDPD_CONFIG_RX_NLP_64_ ((u16)0x0000)
#define PHY_EDPD_CONFIG_RX_NLP_256_ ((u16)0x0400)
#define PHY_EDPD_CONFIG_RX_NLP_512_ ((u16)0x0800)
#define PHY_EDPD_CONFIG_RX_NLP_1000_ ((u16)0x0C00)
#define PHY_EDPD_CONFIG_EXT_CROSSOVER_ ((u16)0x0001)
#define PHY_EDPD_CONFIG_DEFAULT (PHY_EDPD_CONFIG_TX_NLP_EN_ | \
PHY_EDPD_CONFIG_TX_NLP_768_ | \
PHY_EDPD_CONFIG_RX_1_NLP_)
/* Mode Control/Status Register */
#define PHY_MODE_CTRL_STS (17)
#define MODE_CTRL_STS_EDPWRDOWN_ ((u16)0x2000)
#define MODE_CTRL_STS_ENERGYON_ ((u16)0x0002)
/* Control/Status Indication Register */
#define SPECIAL_CTRL_STS (27)
#define SPECIAL_CTRL_STS_OVRRD_AMDIX_ ((u16)0x8000)
#define SPECIAL_CTRL_STS_AMDIX_ENABLE_ ((u16)0x4000)
#define SPECIAL_CTRL_STS_AMDIX_STATE_ ((u16)0x2000)
/* Interrupt Source Register */
#define PHY_INT_SRC (29)
#define PHY_INT_SRC_ENERGY_ON_ ((u16)0x0080)
#define PHY_INT_SRC_ANEG_COMP_ ((u16)0x0040)
#define PHY_INT_SRC_REMOTE_FAULT_ ((u16)0x0020)
#define PHY_INT_SRC_LINK_DOWN_ ((u16)0x0010)
/* Interrupt Mask Register */
#define PHY_INT_MASK (30)
#define PHY_INT_MASK_ENERGY_ON_ ((u16)0x0080)
#define PHY_INT_MASK_ANEG_COMP_ ((u16)0x0040)
#define PHY_INT_MASK_REMOTE_FAULT_ ((u16)0x0020)
#define PHY_INT_MASK_LINK_DOWN_ ((u16)0x0010)
#define PHY_INT_MASK_DEFAULT_ (PHY_INT_MASK_ANEG_COMP_ | \
PHY_INT_MASK_LINK_DOWN_)
/* PHY Special Control/Status Register */
#define PHY_SPECIAL (31)
#define PHY_SPECIAL_SPD_ ((u16)0x001C)
#define PHY_SPECIAL_SPD_10HALF_ ((u16)0x0004)
#define PHY_SPECIAL_SPD_10FULL_ ((u16)0x0014)
#define PHY_SPECIAL_SPD_100HALF_ ((u16)0x0008)
#define PHY_SPECIAL_SPD_100FULL_ ((u16)0x0018)
/* USB Vendor Requests */
#define USB_VENDOR_REQUEST_WRITE_REGISTER 0xA0
#define USB_VENDOR_REQUEST_READ_REGISTER 0xA1
#define USB_VENDOR_REQUEST_GET_STATS 0xA2
/* Interrupt Endpoint status word bitfields */
#define INT_ENP_MAC_RTO_ ((u32)BIT(18)) /* MAC Reset Time Out */
#define INT_ENP_TX_STOP_ ((u32)BIT(17)) /* TX Stopped */
#define INT_ENP_RX_STOP_ ((u32)BIT(16)) /* RX Stopped */
#define INT_ENP_PHY_INT_ ((u32)BIT(15)) /* PHY Interrupt */
#define INT_ENP_TXE_ ((u32)BIT(14)) /* TX Error */
#define INT_ENP_TDFU_ ((u32)BIT(13)) /* TX FIFO Underrun */
#define INT_ENP_TDFO_ ((u32)BIT(12)) /* TX FIFO Overrun */
#define INT_ENP_RXDF_ ((u32)BIT(11)) /* RX Dropped Frame */
#endif /* _SMSC95XX_H */
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