/* SPDX-License-Identifier: GPL-2.0-only */
/* include/linux/amba/pl080.h
 *
 * Copyright 2008 Openmoko, Inc.
 * Copyright 2008 Simtec Electronics
 *      http://armlinux.simtec.co.uk/
 *      Ben Dooks <ben@simtec.co.uk>
 *
 * ARM PrimeCell PL080 DMA controller
*/

/* Note, there are some Samsung updates to this controller block which
 * make it not entierly compatible with the PL080 specification from
 * ARM. When in doubt, check the Samsung documentation first.
 *
 * The Samsung defines are PL080S, and add an extra control register,
 * the ability to move more than 2^11 counts of data and some extra
 * OneNAND features.
*/

#ifndef ASM_PL080_H
#define ASM_PL080_H

#define PL080_INT_STATUS                        (0x00)
#define PL080_TC_STATUS                         (0x04)
#define PL080_TC_CLEAR                          (0x08)
#define PL080_ERR_STATUS                        (0x0C)
#define PL080_ERR_CLEAR                         (0x10)
#define PL080_RAW_TC_STATUS                     (0x14)
#define PL080_RAW_ERR_STATUS                    (0x18)
#define PL080_EN_CHAN                           (0x1c)
#define PL080_SOFT_BREQ                         (0x20)
#define PL080_SOFT_SREQ                         (0x24)
#define PL080_SOFT_LBREQ                        (0x28)
#define PL080_SOFT_LSREQ                        (0x2C)

#define PL080_CONFIG                            (0x30)
#define PL080_CONFIG_M2_BE                      BIT(2)
#define PL080_CONFIG_M1_BE                      BIT(1)
#define PL080_CONFIG_ENABLE                     BIT(0)

#define PL080_SYNC                              (0x34)

/* The Faraday Technology FTDMAC020 variant registers */
#define FTDMAC020_CH_BUSY                       (0x20)
/* Identical to PL080_CONFIG */
#define FTDMAC020_CSR                           (0x24)
/* Identical to PL080_SYNC */
#define FTDMAC020_SYNC                          (0x2C)
#define FTDMAC020_REVISION                      (0x30)
#define FTDMAC020_FEATURE                       (0x34)

/* Per channel configuration registers */
#define PL080_Cx_BASE(x)                        ((0x100 + (x * 0x20)))
#define PL080_CH_SRC_ADDR                       (0x00)
#define PL080_CH_DST_ADDR                       (0x04)
#define PL080_CH_LLI                            (0x08)
#define PL080_CH_CONTROL                        (0x0C)
#define PL080_CH_CONFIG                         (0x10)
#define PL080S_CH_CONTROL2                      (0x10)
#define PL080S_CH_CONFIG                        (0x14)
/* The Faraday FTDMAC020 derivative shuffles the registers around */
#define FTDMAC020_CH_CSR                        (0x00)
#define FTDMAC020_CH_CFG                        (0x04)
#define FTDMAC020_CH_SRC_ADDR                   (0x08)
#define FTDMAC020_CH_DST_ADDR                   (0x0C)
#define FTDMAC020_CH_LLP                        (0x10)
#define FTDMAC020_CH_SIZE                       (0x14)

#define PL080_LLI_ADDR_MASK                     GENMASK(31, 2)
#define PL080_LLI_ADDR_SHIFT                    (2)
#define PL080_LLI_LM_AHB2                       BIT(0)

#define PL080_CONTROL_TC_IRQ_EN                 BIT(31)
#define PL080_CONTROL_PROT_MASK                 GENMASK(30, 28)
#define PL080_CONTROL_PROT_SHIFT                (28)
#define PL080_CONTROL_PROT_CACHE                BIT(30)
#define PL080_CONTROL_PROT_BUFF                 BIT(29)
#define PL080_CONTROL_PROT_SYS                  BIT(28)
#define PL080_CONTROL_DST_INCR                  BIT(27)
#define PL080_CONTROL_SRC_INCR                  BIT(26)
#define PL080_CONTROL_DST_AHB2                  BIT(25)
#define PL080_CONTROL_SRC_AHB2                  BIT(24)
#define PL080_CONTROL_DWIDTH_MASK               GENMASK(23, 21)
#define PL080_CONTROL_DWIDTH_SHIFT              (21)
#define PL080_CONTROL_SWIDTH_MASK               GENMASK(20, 18)
#define PL080_CONTROL_SWIDTH_SHIFT              (18)
#define PL080_CONTROL_DB_SIZE_MASK              GENMASK(17, 15)
#define PL080_CONTROL_DB_SIZE_SHIFT             (15)
#define PL080_CONTROL_SB_SIZE_MASK              GENMASK(14, 12)
#define PL080_CONTROL_SB_SIZE_SHIFT             (12)
#define PL080_CONTROL_TRANSFER_SIZE_MASK        GENMASK(11, 0)
#define PL080S_CONTROL_TRANSFER_SIZE_MASK       GENMASK(24, 0)
#define PL080_CONTROL_TRANSFER_SIZE_SHIFT       (0)

#define PL080_BSIZE_1                           (0x0)
#define PL080_BSIZE_4                           (0x1)
#define PL080_BSIZE_8                           (0x2)
#define PL080_BSIZE_16                          (0x3)
#define PL080_BSIZE_32                          (0x4)
#define PL080_BSIZE_64                          (0x5)
#define PL080_BSIZE_128                         (0x6)
#define PL080_BSIZE_256                         (0x7)

#define PL080_WIDTH_8BIT                        (0x0)
#define PL080_WIDTH_16BIT                       (0x1)
#define PL080_WIDTH_32BIT                       (0x2)

#define PL080N_CONFIG_ITPROT                    BIT(20)
#define PL080N_CONFIG_SECPROT                   BIT(19)
#define PL080_CONFIG_HALT                       BIT(18)
#define PL080_CONFIG_ACTIVE                     BIT(17)  /* RO */
#define PL080_CONFIG_LOCK                       BIT(16)
#define PL080_CONFIG_TC_IRQ_MASK                BIT(15)
#define PL080_CONFIG_ERR_IRQ_MASK               BIT(14)
#define PL080_CONFIG_FLOW_CONTROL_MASK          GENMASK(13, 11)
#define PL080_CONFIG_FLOW_CONTROL_SHIFT         (11)
#define PL080_CONFIG_DST_SEL_MASK               GENMASK(9, 6)
#define PL080_CONFIG_DST_SEL_SHIFT              (6)
#define PL080_CONFIG_SRC_SEL_MASK               GENMASK(4, 1)
#define PL080_CONFIG_SRC_SEL_SHIFT              (1)
#define PL080_CONFIG_ENABLE                     BIT(0)

#define PL080_FLOW_MEM2MEM                      (0x0)
#define PL080_FLOW_MEM2PER                      (0x1)
#define PL080_FLOW_PER2MEM                      (0x2)
#define PL080_FLOW_SRC2DST                      (0x3)
#define PL080_FLOW_SRC2DST_DST                  (0x4)
#define PL080_FLOW_MEM2PER_PER                  (0x5)
#define PL080_FLOW_PER2MEM_PER                  (0x6)
#define PL080_FLOW_SRC2DST_SRC                  (0x7)

#define FTDMAC020_CH_CSR_TC_MSK                 BIT(31)
/* Later versions have a threshold in bits 24..26,  */
#define FTDMAC020_CH_CSR_FIFOTH_MSK             GENMASK(26, 24)
#define FTDMAC020_CH_CSR_FIFOTH_SHIFT           (24)
#define FTDMAC020_CH_CSR_CHPR1_MSK              GENMASK(23, 22)
#define FTDMAC020_CH_CSR_PROT3                  BIT(21)
#define FTDMAC020_CH_CSR_PROT2                  BIT(20)
#define FTDMAC020_CH_CSR_PROT1                  BIT(19)
#define FTDMAC020_CH_CSR_SRC_SIZE_MSK           GENMASK(18, 16)
#define FTDMAC020_CH_CSR_SRC_SIZE_SHIFT         (16)
#define FTDMAC020_CH_CSR_ABT                    BIT(15)
#define FTDMAC020_CH_CSR_SRC_WIDTH_MSK          GENMASK(13, 11)
#define FTDMAC020_CH_CSR_SRC_WIDTH_SHIFT        (11)
#define FTDMAC020_CH_CSR_DST_WIDTH_MSK          GENMASK(10, 8)
#define FTDMAC020_CH_CSR_DST_WIDTH_SHIFT        (8)
#define FTDMAC020_CH_CSR_MODE                   BIT(7)
/* 00 = increase, 01 = decrease, 10 = fix */
#define FTDMAC020_CH_CSR_SRCAD_CTL_MSK          GENMASK(6, 5)
#define FTDMAC020_CH_CSR_SRCAD_CTL_SHIFT        (5)
#define FTDMAC020_CH_CSR_DSTAD_CTL_MSK          GENMASK(4, 3)
#define FTDMAC020_CH_CSR_DSTAD_CTL_SHIFT        (3)
#define FTDMAC020_CH_CSR_SRC_SEL                BIT(2)
#define FTDMAC020_CH_CSR_DST_SEL                BIT(1)
#define FTDMAC020_CH_CSR_EN                     BIT(0)

/* FIFO threshold setting */
#define FTDMAC020_CH_CSR_FIFOTH_1               (0x0)
#define FTDMAC020_CH_CSR_FIFOTH_2               (0x1)
#define FTDMAC020_CH_CSR_FIFOTH_4               (0x2)
#define FTDMAC020_CH_CSR_FIFOTH_8               (0x3)
#define FTDMAC020_CH_CSR_FIFOTH_16              (0x4)
/* The FTDMAC020 supports 64bit wide transfers */
#define FTDMAC020_WIDTH_64BIT                   (0x3)
/* Address can be increased, decreased or fixed */
#define FTDMAC020_CH_CSR_SRCAD_CTL_INC          (0x0)
#define FTDMAC020_CH_CSR_SRCAD_CTL_DEC          (0x1)
#define FTDMAC020_CH_CSR_SRCAD_CTL_FIXED        (0x2)

#define FTDMAC020_CH_CFG_LLP_CNT_MASK           GENMASK(19, 16)
#define FTDMAC020_CH_CFG_LLP_CNT_SHIFT          (16)
#define FTDMAC020_CH_CFG_BUSY                   BIT(8)
#define FTDMAC020_CH_CFG_INT_ABT_MASK           BIT(2)
#define FTDMAC020_CH_CFG_INT_ERR_MASK           BIT(1)
#define FTDMAC020_CH_CFG_INT_TC_MASK            BIT(0)

/* Inside the LLIs, the applicable CSR fields are mapped differently */
#define FTDMAC020_LLI_TC_MSK                    BIT(28)
#define FTDMAC020_LLI_SRC_WIDTH_MSK             GENMASK(27, 25)
#define FTDMAC020_LLI_SRC_WIDTH_SHIFT           (25)
#define FTDMAC020_LLI_DST_WIDTH_MSK             GENMASK(24, 22)
#define FTDMAC020_LLI_DST_WIDTH_SHIFT           (22)
#define FTDMAC020_LLI_SRCAD_CTL_MSK             GENMASK(21, 20)
#define FTDMAC020_LLI_SRCAD_CTL_SHIFT           (20)
#define FTDMAC020_LLI_DSTAD_CTL_MSK             GENMASK(19, 18)
#define FTDMAC020_LLI_DSTAD_CTL_SHIFT           (18)
#define FTDMAC020_LLI_SRC_SEL                   BIT(17)
#define FTDMAC020_LLI_DST_SEL                   BIT(16)
#define FTDMAC020_LLI_TRANSFER_SIZE_MASK        GENMASK(11, 0)
#define FTDMAC020_LLI_TRANSFER_SIZE_SHIFT       (0)

#define FTDMAC020_CFG_LLP_CNT_MASK              GENMASK(19, 16)
#define FTDMAC020_CFG_LLP_CNT_SHIFT             (16)
#define FTDMAC020_CFG_BUSY                      BIT(8)
#define FTDMAC020_CFG_INT_ABT_MSK               BIT(2)
#define FTDMAC020_CFG_INT_ERR_MSK               BIT(1)
#define FTDMAC020_CFG_INT_TC_MSK                BIT(0)

/* DMA linked list chain structure */

struct pl080_lli {
        u32     src_addr;
        u32     dst_addr;
        u32     next_lli;
        u32     control0;
};

struct pl080s_lli {
        u32     src_addr;
        u32     dst_addr;
        u32     next_lli;
        u32     control0;
        u32     control1;
};

#endif /* ASM_PL080_H */