linux-libre/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h

/*******************************************************************************
  DWMAC DMA Header file.

  Copyright (C) 2007-2009  STMicroelectronics Ltd

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope 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.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/

#ifndef __DWMAC_DMA_H__
#define __DWMAC_DMA_H__

/* DMA CRS Control and Status Register Mapping */
#define DMA_BUS_MODE		0x00001000	/* Bus Mode */
#define DMA_XMT_POLL_DEMAND	0x00001004	/* Transmit Poll Demand */
#define DMA_RCV_POLL_DEMAND	0x00001008	/* Received Poll Demand */
#define DMA_RCV_BASE_ADDR	0x0000100c	/* Receive List Base */
#define DMA_TX_BASE_ADDR	0x00001010	/* Transmit List Base */
#define DMA_STATUS		0x00001014	/* Status Register */
#define DMA_CONTROL		0x00001018	/* Ctrl (Operational Mode) */
#define DMA_INTR_ENA		0x0000101c	/* Interrupt Enable */
#define DMA_MISSED_FRAME_CTR	0x00001020	/* Missed Frame Counter */

/* SW Reset */
#define DMA_BUS_MODE_SFT_RESET	0x00000001	/* Software Reset */

/* Rx watchdog register */
#define DMA_RX_WATCHDOG		0x00001024

/* AXI Master Bus Mode */
#define DMA_AXI_BUS_MODE	0x00001028

#define DMA_AXI_EN_LPI		BIT(31)
#define DMA_AXI_LPI_XIT_FRM	BIT(30)
#define DMA_AXI_WR_OSR_LMT	GENMASK(23, 20)
#define DMA_AXI_WR_OSR_LMT_SHIFT	20
#define DMA_AXI_WR_OSR_LMT_MASK	0xf
#define DMA_AXI_RD_OSR_LMT	GENMASK(19, 16)
#define DMA_AXI_RD_OSR_LMT_SHIFT	16
#define DMA_AXI_RD_OSR_LMT_MASK	0xf

#define DMA_AXI_OSR_MAX		0xf
#define DMA_AXI_MAX_OSR_LIMIT ((DMA_AXI_OSR_MAX << DMA_AXI_WR_OSR_LMT_SHIFT) | \
			       (DMA_AXI_OSR_MAX << DMA_AXI_RD_OSR_LMT_SHIFT))
#define	DMA_AXI_1KBBE		BIT(13)
#define DMA_AXI_AAL		BIT(12)
#define DMA_AXI_BLEN256		BIT(7)
#define DMA_AXI_BLEN128		BIT(6)
#define DMA_AXI_BLEN64		BIT(5)
#define DMA_AXI_BLEN32		BIT(4)
#define DMA_AXI_BLEN16		BIT(3)
#define DMA_AXI_BLEN8		BIT(2)
#define DMA_AXI_BLEN4		BIT(1)
#define DMA_BURST_LEN_DEFAULT	(DMA_AXI_BLEN256 | DMA_AXI_BLEN128 | \
				 DMA_AXI_BLEN64 | DMA_AXI_BLEN32 | \
				 DMA_AXI_BLEN16 | DMA_AXI_BLEN8 | \
				 DMA_AXI_BLEN4)

#define DMA_AXI_UNDEF		BIT(0)

#define DMA_AXI_BURST_LEN_MASK	0x000000FE

#define DMA_CUR_TX_BUF_ADDR	0x00001050	/* Current Host Tx Buffer */
#define DMA_CUR_RX_BUF_ADDR	0x00001054	/* Current Host Rx Buffer */
#define DMA_HW_FEATURE		0x00001058	/* HW Feature Register */

/* DMA Control register defines */
#define DMA_CONTROL_ST		0x00002000	/* Start/Stop Transmission */
#define DMA_CONTROL_SR		0x00000002	/* Start/Stop Receive */

/* DMA Normal interrupt */
#define DMA_INTR_ENA_NIE 0x00010000	/* Normal Summary */
#define DMA_INTR_ENA_TIE 0x00000001	/* Transmit Interrupt */
#define DMA_INTR_ENA_TUE 0x00000004	/* Transmit Buffer Unavailable */
#define DMA_INTR_ENA_RIE 0x00000040	/* Receive Interrupt */
#define DMA_INTR_ENA_ERE 0x00004000	/* Early Receive */

#define DMA_INTR_NORMAL	(DMA_INTR_ENA_NIE | DMA_INTR_ENA_RIE | \
			DMA_INTR_ENA_TIE)

/* DMA Abnormal interrupt */
#define DMA_INTR_ENA_AIE 0x00008000	/* Abnormal Summary */
#define DMA_INTR_ENA_FBE 0x00002000	/* Fatal Bus Error */
#define DMA_INTR_ENA_ETE 0x00000400	/* Early Transmit */
#define DMA_INTR_ENA_RWE 0x00000200	/* Receive Watchdog */
#define DMA_INTR_ENA_RSE 0x00000100	/* Receive Stopped */
#define DMA_INTR_ENA_RUE 0x00000080	/* Receive Buffer Unavailable */
#define DMA_INTR_ENA_UNE 0x00000020	/* Tx Underflow */
#define DMA_INTR_ENA_OVE 0x00000010	/* Receive Overflow */
#define DMA_INTR_ENA_TJE 0x00000008	/* Transmit Jabber */
#define DMA_INTR_ENA_TSE 0x00000002	/* Transmit Stopped */

#define DMA_INTR_ABNORMAL	(DMA_INTR_ENA_AIE | DMA_INTR_ENA_FBE | \
				DMA_INTR_ENA_UNE)

/* DMA default interrupt mask */
#define DMA_INTR_DEFAULT_MASK	(DMA_INTR_NORMAL | DMA_INTR_ABNORMAL)

/* DMA Status register defines */
#define DMA_STATUS_GLPII	0x40000000	/* GMAC LPI interrupt */
#define DMA_STATUS_GPI		0x10000000	/* PMT interrupt */
#define DMA_STATUS_GMI		0x08000000	/* MMC interrupt */
#define DMA_STATUS_GLI		0x04000000	/* GMAC Line interface int */
#define DMA_STATUS_EB_MASK	0x00380000	/* Error Bits Mask */
#define DMA_STATUS_EB_TX_ABORT	0x00080000	/* Error Bits - TX Abort */
#define DMA_STATUS_EB_RX_ABORT	0x00100000	/* Error Bits - RX Abort */
#define DMA_STATUS_TS_MASK	0x00700000	/* Transmit Process State */
#define DMA_STATUS_TS_SHIFT	20
#define DMA_STATUS_RS_MASK	0x000e0000	/* Receive Process State */
#define DMA_STATUS_RS_SHIFT	17
#define DMA_STATUS_NIS	0x00010000	/* Normal Interrupt Summary */
#define DMA_STATUS_AIS	0x00008000	/* Abnormal Interrupt Summary */
#define DMA_STATUS_ERI	0x00004000	/* Early Receive Interrupt */
#define DMA_STATUS_FBI	0x00002000	/* Fatal Bus Error Interrupt */
#define DMA_STATUS_ETI	0x00000400	/* Early Transmit Interrupt */
#define DMA_STATUS_RWT	0x00000200	/* Receive Watchdog Timeout */
#define DMA_STATUS_RPS	0x00000100	/* Receive Process Stopped */
#define DMA_STATUS_RU	0x00000080	/* Receive Buffer Unavailable */
#define DMA_STATUS_RI	0x00000040	/* Receive Interrupt */
#define DMA_STATUS_UNF	0x00000020	/* Transmit Underflow */
#define DMA_STATUS_OVF	0x00000010	/* Receive Overflow */
#define DMA_STATUS_TJT	0x00000008	/* Transmit Jabber Timeout */
#define DMA_STATUS_TU	0x00000004	/* Transmit Buffer Unavailable */
#define DMA_STATUS_TPS	0x00000002	/* Transmit Process Stopped */
#define DMA_STATUS_TI	0x00000001	/* Transmit Interrupt */
#define DMA_CONTROL_FTF		0x00100000	/* Flush transmit FIFO */

void dwmac_enable_dma_transmission(void __iomem *ioaddr);
void dwmac_enable_dma_irq(void __iomem *ioaddr);
void dwmac_disable_dma_irq(void __iomem *ioaddr);
void dwmac_dma_start_tx(void __iomem *ioaddr);
void dwmac_dma_stop_tx(void __iomem *ioaddr);
void dwmac_dma_start_rx(void __iomem *ioaddr);
void dwmac_dma_stop_rx(void __iomem *ioaddr);
int dwmac_dma_interrupt(void __iomem *ioaddr, struct stmmac_extra_stats *x);
int dwmac_dma_reset(void __iomem *ioaddr);

#endif /* __DWMAC_DMA_H__ */