xilinx_ll_temac_sdma.h
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/*
* Xilinx xps_ll_temac ethernet driver for u-boot
*
* SDMA sub-controller interface
*
* Copyright (C) 2011 - 2012 Stephan Linz <linz@li-pro.net>
* Copyright (C) 2008 - 2011 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2008 - 2011 PetaLogix
*
* Based on Yoshio Kashiwagi kashiwagi@co-nss.co.jp driver
* Copyright (C) 2008 Nissin Systems Co.,Ltd.
* March 2008 created
*
* SPDX-License-Identifier: GPL-2.0+
*
* [0]: http://www.xilinx.com/support/documentation
*
* [S]: [0]/ip_documentation/xps_ll_temac.pdf
* [A]: [0]/application_notes/xapp1041.pdf
*/
#ifndef _XILINX_LL_TEMAC_SDMA_
#define _XILINX_LL_TEMAC_SDMA_
#include <net.h>
#include <asm/types.h>
#include <asm/byteorder.h>
#include <linux/compiler.h>
#if !defined(__BIG_ENDIAN)
# error LL_TEMAC requires big endianess
#endif
/*
* DMA Buffer Descriptor for CDMAC
*
* Used for data connection from and to (Rx/Tx) the LocalLink (LL) TEMAC via
* the Communications Direct Memory Access Controller (CDMAC) -- one for each.
*
* overview:
* ftp://ftp.xilinx.com/pub/documentation/misc/mpmc_getting_started.pdf
*
* [1]: [0]/ip_documentation/mpmc.pdf
* page 140, DMA Operation Descriptors
*
* [2]: [0]/user_guides/ug200.pdf
* page 229, DMA Controller -- Descriptor Format
*
* [3]: [0]/ip_documentation/xps_ll_temac.pdf
* page 72, Transmit LocalLink Frame Format
* page 73, Receive LocalLink Frame Format
*/
struct cdmac_bd {
struct cdmac_bd *next_p; /* Next Descriptor Pointer */
u8 *phys_buf_p; /* Buffer Address */
u32 buf_len; /* Buffer Length */
union {
u8 stctrl; /* Status/Control the DMA transfer */
u32 app[5]; /* application specific data */
} __packed __aligned(1) sca;
};
/* CDMAC Descriptor Status and Control (stctrl), [1] p140, [2] p230 */
#define CDMAC_BD_STCTRL_ERROR (1 << 7)
#define CDMAC_BD_STCTRL_IRQ_ON_END (1 << 6)
#define CDMAC_BD_STCTRL_STOP_ON_END (1 << 5)
#define CDMAC_BD_STCTRL_COMPLETED (1 << 4)
#define CDMAC_BD_STCTRL_SOP (1 << 3)
#define CDMAC_BD_STCTRL_EOP (1 << 2)
#define CDMAC_BD_STCTRL_DMACHBUSY (1 << 1)
/* CDMAC Descriptor APP0: Transmit LocalLink Footer Word 3, [3] p72 */
#define CDMAC_BD_APP0_TXCSCNTRL (1 << 0)
/* CDMAC Descriptor APP1: Transmit LocalLink Footer Word 4, [3] p73 */
#define CDMAC_BD_APP1_TXCSBEGIN_POS 16
#define CDMAC_BD_APP1_TXCSBEGIN_MASK (0xFFFF << CDMAC_BD_APP1_TXCSBEGIN_POS)
#define CDMAC_BD_APP1_TXCSINSERT_POS 0
#define CDMAC_BD_APP1_TXCSINSERT_MASK (0xFFFF << CDMAC_BD_APP1_TXCSINSERT_POS)
/* CDMAC Descriptor APP2: Transmit LocalLink Footer Word 5, [3] p73 */
#define CDMAC_BD_APP2_TXCSINIT_POS 0
#define CDMAC_BD_APP2_TXCSINIT_MASK (0xFFFF << CDMAC_BD_APP2_TXCSINIT_POS)
/* CDMAC Descriptor APP0: Receive LocalLink Footer Word 3, [3] p73 */
#define CDMAC_BD_APP0_MADDRU_POS 0
#define CDMAC_BD_APP0_MADDRU_MASK (0xFFFF << CDMAC_BD_APP0_MADDRU_POS)
/* CDMAC Descriptor APP1: Receive LocalLink Footer Word 4, [3] p74 */
#define CDMAC_BD_APP1_MADDRL_POS 0
#define CDMAC_BD_APP1_MADDRL_MASK (~0UL << CDMAC_BD_APP1_MADDRL_POS)
/* CDMAC Descriptor APP2: Receive LocalLink Footer Word 5, [3] p74 */
#define CDMAC_BD_APP2_BCAST_FRAME (1 << 2)
#define CDMAC_BD_APP2_IPC_MCAST_FRAME (1 << 1)
#define CDMAC_BD_APP2_MAC_MCAST_FRAME (1 << 0)
/* CDMAC Descriptor APP3: Receive LocalLink Footer Word 6, [3] p74 */
#define CDMAC_BD_APP3_TLTPID_POS 16
#define CDMAC_BD_APP3_TLTPID_MASK (0xFFFF << CDMAC_BD_APP3_TLTPID_POS)
#define CDMAC_BD_APP3_RXCSRAW_POS 0
#define CDMAC_BD_APP3_RXCSRAW_MASK (0xFFFF << CDMAC_BD_APP3_RXCSRAW_POS)
/* CDMAC Descriptor APP4: Receive LocalLink Footer Word 7, [3] p74 */
#define CDMAC_BD_APP4_VLANTAG_POS 16
#define CDMAC_BD_APP4_VLANTAG_MASK (0xFFFF << CDMAC_BD_APP4_VLANTAG_POS)
#define CDMAC_BD_APP4_RXBYTECNT_POS 0
#define CDMAC_BD_APP4_RXBYTECNT_MASK (0x3FFF << CDMAC_BD_APP4_RXBYTECNT_POS)
/*
* SDMA Register Definition
*
* [0]: http://www.xilinx.com/support/documentation
*
* [1]: [0]/ip_documentation/mpmc.pdf
* page 54, SDMA Register Summary
* page 160, SDMA Registers
*
* [2]: [0]/user_guides/ug200.pdf
* page 244, DMA Controller -- Programming Interface and Registers
*/
#define SDMA_CTRL_REGTYPE u32
#define SDMA_CTRL_REGSIZE sizeof(SDMA_CTRL_REGTYPE)
struct sdma_ctrl {
/* Transmit Registers */
SDMA_CTRL_REGTYPE tx_nxtdesc_ptr; /* TX Next Description Pointer */
SDMA_CTRL_REGTYPE tx_curbuf_addr; /* TX Current Buffer Address */
SDMA_CTRL_REGTYPE tx_curbuf_length; /* TX Current Buffer Length */
SDMA_CTRL_REGTYPE tx_curdesc_ptr; /* TX Current Descriptor Pointer */
SDMA_CTRL_REGTYPE tx_taildesc_ptr; /* TX Tail Descriptor Pointer */
SDMA_CTRL_REGTYPE tx_chnl_ctrl; /* TX Channel Control */
SDMA_CTRL_REGTYPE tx_irq_reg; /* TX Interrupt Register */
SDMA_CTRL_REGTYPE tx_chnl_sts; /* TX Status Register */
/* Receive Registers */
SDMA_CTRL_REGTYPE rx_nxtdesc_ptr; /* RX Next Descriptor Pointer */
SDMA_CTRL_REGTYPE rx_curbuf_addr; /* RX Current Buffer Address */
SDMA_CTRL_REGTYPE rx_curbuf_length; /* RX Current Buffer Length */
SDMA_CTRL_REGTYPE rx_curdesc_ptr; /* RX Current Descriptor Pointer */
SDMA_CTRL_REGTYPE rx_taildesc_ptr; /* RX Tail Descriptor Pointer */
SDMA_CTRL_REGTYPE rx_chnl_ctrl; /* RX Channel Control */
SDMA_CTRL_REGTYPE rx_irq_reg; /* RX Interrupt Register */
SDMA_CTRL_REGTYPE rx_chnl_sts; /* RX Status Register */
/* Control Registers */
SDMA_CTRL_REGTYPE dma_control_reg; /* DMA Control Register */
};
#define SDMA_CTRL_REGNUMS sizeof(struct sdma_ctrl)/SDMA_CTRL_REGSIZE
/*
* DMAC Register Index Enumeration
*
* [2]: http://www.xilinx.com/support/documentation/user_guides/ug200.pdf
* page 244, DMA Controller -- Programming Interface and Registers
*/
enum dmac_ctrl {
/* Transmit Registers */
TX_NXTDESC_PTR = 0, /* TX Next Description Pointer */
TX_CURBUF_ADDR, /* TX Current Buffer Address */
TX_CURBUF_LENGTH, /* TX Current Buffer Length */
TX_CURDESC_PTR, /* TX Current Descriptor Pointer */
TX_TAILDESC_PTR, /* TX Tail Descriptor Pointer */
TX_CHNL_CTRL, /* TX Channel Control */
TX_IRQ_REG, /* TX Interrupt Register */
TX_CHNL_STS, /* TX Status Register */
/* Receive Registers */
RX_NXTDESC_PTR, /* RX Next Descriptor Pointer */
RX_CURBUF_ADDR, /* RX Current Buffer Address */
RX_CURBUF_LENGTH, /* RX Current Buffer Length */
RX_CURDESC_PTR, /* RX Current Descriptor Pointer */
RX_TAILDESC_PTR, /* RX Tail Descriptor Pointer */
RX_CHNL_CTRL, /* RX Channel Control */
RX_IRQ_REG, /* RX Interrupt Register */
RX_CHNL_STS, /* RX Status Register */
/* Control Registers */
DMA_CONTROL_REG /* DMA Control Register */
};
/* Rx/Tx Channel Control Register (*_chnl_ctrl), [1] p163, [2] p246/p252 */
#define CHNL_CTRL_ITO_POS 24
#define CHNL_CTRL_ITO_MASK (0xFF << CHNL_CTRL_ITO_POS)
#define CHNL_CTRL_IC_POS 16
#define CHNL_CTRL_IC_MASK (0xFF << CHNL_CTRL_IC_POS)
#define CHNL_CTRL_MSBADDR_POS 12
#define CHNL_CTRL_MSBADDR_MASK (0xF << CHNL_CTRL_MSBADDR_POS)
#define CHNL_CTRL_AME (1 << 11)
#define CHNL_CTRL_OBWC (1 << 10)
#define CHNL_CTRL_IOE (1 << 9)
#define CHNL_CTRL_LIC (1 << 8)
#define CHNL_CTRL_IE (1 << 7)
#define CHNL_CTRL_IEE (1 << 2)
#define CHNL_CTRL_IDE (1 << 1)
#define CHNL_CTRL_ICE (1 << 0)
/* All interrupt enable bits */
#define CHNL_CTRL_IRQ_MASK (CHNL_CTRL_IE | \
CHNL_CTRL_IEE | \
CHNL_CTRL_IDE | \
CHNL_CTRL_ICE)
/* Rx/Tx Interrupt Status Register (*_irq_reg), [1] p164, [2] p247/p253 */
#define IRQ_REG_DTV_POS 24
#define IRQ_REG_DTV_MASK (0xFF << IRQ_REG_DTV_POS)
#define IRQ_REG_CCV_POS 16
#define IRQ_REG_CCV_MASK (0xFF << IRQ_REG_CCV_POS)
#define IRQ_REG_WRCQ_EMPTY (1 << 14)
#define IRQ_REG_CIC_POS 10
#define IRQ_REG_CIC_MASK (0xF << IRQ_REG_CIC_POS)
#define IRQ_REG_DIC_POS 8
#define IRQ_REG_DIC_MASK (3 << 8)
#define IRQ_REG_PLB_RD_NMI (1 << 4)
#define IRQ_REG_PLB_WR_NMI (1 << 3)
#define IRQ_REG_EI (1 << 2)
#define IRQ_REG_DI (1 << 1)
#define IRQ_REG_CI (1 << 0)
/* All interrupt bits */
#define IRQ_REG_IRQ_MASK (IRQ_REG_PLB_RD_NMI | \
IRQ_REG_PLB_WR_NMI | \
IRQ_REG_EI | IRQ_REG_DI | IRQ_REG_CI)
/* Rx/Tx Channel Status Register (*_chnl_sts), [1] p165, [2] p249/p255 */
#define CHNL_STS_ERROR_TAIL (1 << 21)
#define CHNL_STS_ERROR_CMP (1 << 20)
#define CHNL_STS_ERROR_ADDR (1 << 19)
#define CHNL_STS_ERROR_NXTP (1 << 18)
#define CHNL_STS_ERROR_CURP (1 << 17)
#define CHNL_STS_ERROR_BSYWR (1 << 16)
#define CHNL_STS_ERROR (1 << 7)
#define CHNL_STS_IOE (1 << 6)
#define CHNL_STS_SOE (1 << 5)
#define CHNL_STS_CMPLT (1 << 4)
#define CHNL_STS_SOP (1 << 3)
#define CHNL_STS_EOP (1 << 2)
#define CHNL_STS_EBUSY (1 << 1)
/* DMA Control Register (dma_control_reg), [1] p166, [2] p256 */
#define DMA_CONTROL_PLBED (1 << 5)
#define DMA_CONTROL_RXOCEID (1 << 4)
#define DMA_CONTROL_TXOCEID (1 << 3)
#define DMA_CONTROL_TPE (1 << 2)
#define DMA_CONTROL_RESET (1 << 0)
#if defined(CONFIG_XILINX_440) || defined(CONFIG_XILINX_405)
/* Xilinx Device Control Register (DCR) in/out accessors */
unsigned ll_temac_xldcr_in32(phys_addr_t addr);
void ll_temac_xldcr_out32(phys_addr_t addr, unsigned value);
/* collect all register addresses for Xilinx DCR in/out accessors */
void ll_temac_collect_xldcr_sdma_reg_addr(struct eth_device *dev);
#endif /* CONFIG_XILINX_440 || CONFIG_XILINX_405 */
/* Xilinx Processor Local Bus (PLB) in/out accessors */
unsigned ll_temac_xlplb_in32(phys_addr_t base);
void ll_temac_xlplb_out32(phys_addr_t base, unsigned value);
/* collect all register addresses for Xilinx PLB in/out accessors */
void ll_temac_collect_xlplb_sdma_reg_addr(struct eth_device *dev);
/* initialize both Rx/Tx buffer descriptors */
int ll_temac_init_sdma(struct eth_device *dev);
/* halt both Rx/Tx transfers */
int ll_temac_halt_sdma(struct eth_device *dev);
/* reset SDMA and IRQ, disable interrupts and errors */
int ll_temac_reset_sdma(struct eth_device *dev);
/* receive buffered data from SDMA (polling ISR) */
int ll_temac_recv_sdma(struct eth_device *dev);
/* send buffered data to SDMA */
int ll_temac_send_sdma(struct eth_device *dev, void *packet, int length);
#endif /* _XILINX_LL_TEMAC_SDMA_ */