adma.h

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/*
 * Copyright(c) 2006, Intel Corporation.
 *
 * 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.
 *
 */
#ifndef _ADMA_H
#define _ADMA_H
#include <linux/types.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/hardware/iop_adma.h>

#define ADMA_ACCR(chan) (chan->mmr_base + 0x0)
#define ADMA_ACSR(chan) (chan->mmr_base + 0x4)
#define ADMA_ADAR(chan) (chan->mmr_base + 0x8)
#define ADMA_IIPCR(chan)    (chan->mmr_base + 0x18)
#define ADMA_IIPAR(chan)    (chan->mmr_base + 0x1c)
#define ADMA_IIPUAR(chan)   (chan->mmr_base + 0x20)
#define ADMA_ANDAR(chan)    (chan->mmr_base + 0x24)
#define ADMA_ADCR(chan) (chan->mmr_base + 0x28)
#define ADMA_CARMD(chan)    (chan->mmr_base + 0x2c)
#define ADMA_ABCR(chan) (chan->mmr_base + 0x30)
#define ADMA_DLADR(chan)    (chan->mmr_base + 0x34)
#define ADMA_DUADR(chan)    (chan->mmr_base + 0x38)
#define ADMA_SLAR(src, chan)    (chan->mmr_base + (0x3c + (src << 3)))
#define ADMA_SUAR(src, chan)    (chan->mmr_base + (0x40 + (src << 3)))

struct iop13xx_adma_src {
    u32 src_addr;
    union {
        u32 upper_src_addr;
        struct {
            unsigned int pq_upper_src_addr:24;
            unsigned int pq_dmlt:8;
        };
    };
};

struct iop13xx_adma_desc_ctrl {
    unsigned int int_en:1;
    unsigned int xfer_dir:2;
    unsigned int src_select:4;
    unsigned int zero_result:1;
    unsigned int block_fill_en:1;
    unsigned int crc_gen_en:1;
    unsigned int crc_xfer_dis:1;
    unsigned int crc_seed_fetch_dis:1;
    unsigned int status_write_back_en:1;
    unsigned int endian_swap_en:1;
    unsigned int reserved0:2;
    unsigned int pq_update_xfer_en:1;
    unsigned int dual_xor_en:1;
    unsigned int pq_xfer_en:1;
    unsigned int p_xfer_dis:1;
    unsigned int reserved1:10;
    unsigned int relax_order_en:1;
    unsigned int no_snoop_en:1;
};

struct iop13xx_adma_byte_count {
    unsigned int byte_count:24;
    unsigned int host_if:3;
    unsigned int reserved:2;
    unsigned int zero_result_err_q:1;
    unsigned int zero_result_err:1;
    unsigned int tx_complete:1;
};

struct iop13xx_adma_desc_hw {
    u32 next_desc;
    union {
        u32 desc_ctrl;
        struct iop13xx_adma_desc_ctrl desc_ctrl_field;
    };
    union {
        u32 crc_addr;
        u32 block_fill_data;
        u32 q_dest_addr;
    };
    union {
        u32 byte_count;
        struct iop13xx_adma_byte_count byte_count_field;
    };
    union {
        u32 dest_addr;
        u32 p_dest_addr;
    };
    union {
        u32 upper_dest_addr;
        u32 pq_upper_dest_addr;
    };
    struct iop13xx_adma_src src[1];
};

struct iop13xx_adma_desc_dual_xor {
    u32 next_desc;
    u32 desc_ctrl;
    u32 reserved;
    u32 byte_count;
    u32 h_dest_addr;
    u32 h_upper_dest_addr;
    u32 src0_addr;
    u32 upper_src0_addr;
    u32 src1_addr;
    u32 upper_src1_addr;
    u32 h_src_addr;
    u32 h_upper_src_addr;
    u32 d_src_addr;
    u32 d_upper_src_addr;
    u32 d_dest_addr;
    u32 d_upper_dest_addr;
};

struct iop13xx_adma_desc_pq_update {
    u32 next_desc;
    u32 desc_ctrl;
    u32 reserved;
    u32 byte_count;
    u32 p_dest_addr;
    u32 p_upper_dest_addr;
    u32 src0_addr;
    u32 upper_src0_addr;
    u32 src1_addr;
    u32 upper_src1_addr;
    u32 p_src_addr;
    u32 p_upper_src_addr;
    u32 q_src_addr;
    struct {
        unsigned int q_upper_src_addr:24;
        unsigned int q_dmlt:8;
    };
    u32 q_dest_addr;
    u32 q_upper_dest_addr;
};

static inline int iop_adma_get_max_xor(void)
{
    return 16;
}

#define iop_adma_get_max_pq iop_adma_get_max_xor

static inline u32 iop_chan_get_current_descriptor(struct iop_adma_chan *chan)
{
    return __raw_readl(ADMA_ADAR(chan));
}

static inline void iop_chan_set_next_descriptor(struct iop_adma_chan *chan,
                        u32 next_desc_addr)
{
    __raw_writel(next_desc_addr, ADMA_ANDAR(chan));
}

#define ADMA_STATUS_BUSY (1 << 13)

static inline char iop_chan_is_busy(struct iop_adma_chan *chan)
{
    if (__raw_readl(ADMA_ACSR(chan)) &
        ADMA_STATUS_BUSY)
        return 1;
    else
        return 0;
}

static inline int
iop_chan_get_desc_align(struct iop_adma_chan *chan, int num_slots)
{
    return 1;
}
#define iop_desc_is_aligned(x, y) 1

static inline int
iop_chan_memcpy_slot_count(size_t len, int *slots_per_op)
{
    *slots_per_op = 1;
    return 1;
}

#define iop_chan_interrupt_slot_count(s, c) iop_chan_memcpy_slot_count(0, s)

static inline int
iop_chan_memset_slot_count(size_t len, int *slots_per_op)
{
    *slots_per_op = 1;
    return 1;
}

static inline int
iop_chan_xor_slot_count(size_t len, int src_cnt, int *slots_per_op)
{
    static const char slot_count_table[] = { 1, 2, 2, 2,
                         2, 3, 3, 3,
                         3, 4, 4, 4,
                         4, 5, 5, 5,
                        };
    *slots_per_op = slot_count_table[src_cnt - 1];
    return *slots_per_op;
}

#define ADMA_MAX_BYTE_COUNT (16 * 1024 * 1024)
#define IOP_ADMA_MAX_BYTE_COUNT ADMA_MAX_BYTE_COUNT
#define IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT ADMA_MAX_BYTE_COUNT
#define IOP_ADMA_XOR_MAX_BYTE_COUNT ADMA_MAX_BYTE_COUNT
#define IOP_ADMA_PQ_MAX_BYTE_COUNT ADMA_MAX_BYTE_COUNT
#define iop_chan_zero_sum_slot_count(l, s, o) iop_chan_xor_slot_count(l, s, o)
#define iop_chan_pq_slot_count iop_chan_xor_slot_count
#define iop_chan_pq_zero_sum_slot_count iop_chan_xor_slot_count

static inline u32 iop_desc_get_dest_addr(struct iop_adma_desc_slot *desc,
                    struct iop_adma_chan *chan)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    return hw_desc->dest_addr;
}

static inline u32 iop_desc_get_qdest_addr(struct iop_adma_desc_slot *desc,
                      struct iop_adma_chan *chan)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    return hw_desc->q_dest_addr;
}

static inline u32 iop_desc_get_byte_count(struct iop_adma_desc_slot *desc,
                    struct iop_adma_chan *chan)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    return hw_desc->byte_count_field.byte_count;
}

static inline u32 iop_desc_get_src_addr(struct iop_adma_desc_slot *desc,
                    struct iop_adma_chan *chan,
                    int src_idx)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    return hw_desc->src[src_idx].src_addr;
}

static inline u32 iop_desc_get_src_count(struct iop_adma_desc_slot *desc,
                    struct iop_adma_chan *chan)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    return hw_desc->desc_ctrl_field.src_select + 1;
}

static inline void
iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, unsigned long flags)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    union {
        u32 value;
        struct iop13xx_adma_desc_ctrl field;
    } u_desc_ctrl;

    u_desc_ctrl.value = 0;
    u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
    u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
    hw_desc->desc_ctrl = u_desc_ctrl.value;
    hw_desc->crc_addr = 0;
}

static inline void
iop_desc_init_memset(struct iop_adma_desc_slot *desc, unsigned long flags)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    union {
        u32 value;
        struct iop13xx_adma_desc_ctrl field;
    } u_desc_ctrl;

    u_desc_ctrl.value = 0;
    u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
    u_desc_ctrl.field.block_fill_en = 1;
    u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
    hw_desc->desc_ctrl = u_desc_ctrl.value;
    hw_desc->crc_addr = 0;
}

/* to do: support buffers larger than ADMA_MAX_BYTE_COUNT */
static inline void
iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt,
          unsigned long flags)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    union {
        u32 value;
        struct iop13xx_adma_desc_ctrl field;
    } u_desc_ctrl;

    u_desc_ctrl.value = 0;
    u_desc_ctrl.field.src_select = src_cnt - 1;
    u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
    u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
    hw_desc->desc_ctrl = u_desc_ctrl.value;
    hw_desc->crc_addr = 0;

}
#define iop_desc_init_null_xor(d, s, i) iop_desc_init_xor(d, s, i)

/* to do: support buffers larger than ADMA_MAX_BYTE_COUNT */
static inline int
iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
               unsigned long flags)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    union {
        u32 value;
        struct iop13xx_adma_desc_ctrl field;
    } u_desc_ctrl;

    u_desc_ctrl.value = 0;
    u_desc_ctrl.field.src_select = src_cnt - 1;
    u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
    u_desc_ctrl.field.zero_result = 1;
    u_desc_ctrl.field.status_write_back_en = 1;
    u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
    hw_desc->desc_ctrl = u_desc_ctrl.value;
    hw_desc->crc_addr = 0;

    return 1;
}

static inline void
iop_desc_init_pq(struct iop_adma_desc_slot *desc, int src_cnt,
          unsigned long flags)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    union {
        u32 value;
        struct iop13xx_adma_desc_ctrl field;
    } u_desc_ctrl;

    u_desc_ctrl.value = 0;
    u_desc_ctrl.field.src_select = src_cnt - 1;
    u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
    u_desc_ctrl.field.pq_xfer_en = 1;
    u_desc_ctrl.field.p_xfer_dis = !!(flags & DMA_PREP_PQ_DISABLE_P);
    u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
    hw_desc->desc_ctrl = u_desc_ctrl.value;
}

static inline int iop_desc_is_pq(struct iop_adma_desc_slot *desc)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    union {
        u32 value;
        struct iop13xx_adma_desc_ctrl field;
    } u_desc_ctrl;

    u_desc_ctrl.value = hw_desc->desc_ctrl;
    return u_desc_ctrl.field.pq_xfer_en;
}

static inline void
iop_desc_init_pq_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
              unsigned long flags)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    union {
        u32 value;
        struct iop13xx_adma_desc_ctrl field;
    } u_desc_ctrl;

    u_desc_ctrl.value = 0;
    u_desc_ctrl.field.src_select = src_cnt - 1;
    u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
    u_desc_ctrl.field.zero_result = 1;
    u_desc_ctrl.field.status_write_back_en = 1;
    u_desc_ctrl.field.pq_xfer_en = 1;
    u_desc_ctrl.field.p_xfer_dis = !!(flags & DMA_PREP_PQ_DISABLE_P);
    u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
    hw_desc->desc_ctrl = u_desc_ctrl.value;
}

static inline void iop_desc_set_byte_count(struct iop_adma_desc_slot *desc,
                    struct iop_adma_chan *chan,
                    u32 byte_count)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    hw_desc->byte_count = byte_count;
}

static inline void
iop_desc_set_zero_sum_byte_count(struct iop_adma_desc_slot *desc, u32 len)
{
    int slots_per_op = desc->slots_per_op;
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc, *iter;
    int i = 0;

    if (len <= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
        hw_desc->byte_count = len;
    } else {
        do {
            iter = iop_hw_desc_slot_idx(hw_desc, i);
            iter->byte_count = IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
            len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
            i += slots_per_op;
        } while (len > IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT);

        if (len) {
            iter = iop_hw_desc_slot_idx(hw_desc, i);
            iter->byte_count = len;
        }
    }
}

#define iop_desc_set_pq_zero_sum_byte_count iop_desc_set_zero_sum_byte_count

static inline void iop_desc_set_dest_addr(struct iop_adma_desc_slot *desc,
                    struct iop_adma_chan *chan,
                    dma_addr_t addr)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    hw_desc->dest_addr = addr;
    hw_desc->upper_dest_addr = 0;
}

static inline void
iop_desc_set_pq_addr(struct iop_adma_desc_slot *desc, dma_addr_t *addr)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;

    hw_desc->dest_addr = addr[0];
    hw_desc->q_dest_addr = addr[1];
    hw_desc->upper_dest_addr = 0;
}

static inline void iop_desc_set_memcpy_src_addr(struct iop_adma_desc_slot *desc,
                    dma_addr_t addr)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    hw_desc->src[0].src_addr = addr;
    hw_desc->src[0].upper_src_addr = 0;
}

static inline void iop_desc_set_xor_src_addr(struct iop_adma_desc_slot *desc,
                    int src_idx, dma_addr_t addr)
{
    int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc, *iter;
    int i = 0;

    do {
        iter = iop_hw_desc_slot_idx(hw_desc, i);
        iter->src[src_idx].src_addr = addr;
        iter->src[src_idx].upper_src_addr = 0;
        slot_cnt -= slots_per_op;
        if (slot_cnt) {
            i += slots_per_op;
            addr += IOP_ADMA_XOR_MAX_BYTE_COUNT;
        }
    } while (slot_cnt);
}

static inline void
iop_desc_set_pq_src_addr(struct iop_adma_desc_slot *desc, int src_idx,
             dma_addr_t addr, unsigned char coef)
{
    int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc, *iter;
    struct iop13xx_adma_src *src;
    int i = 0;

    do {
        iter = iop_hw_desc_slot_idx(hw_desc, i);
        src = &iter->src[src_idx];
        src->src_addr = addr;
        src->pq_upper_src_addr = 0;
        src->pq_dmlt = coef;
        slot_cnt -= slots_per_op;
        if (slot_cnt) {
            i += slots_per_op;
            addr += IOP_ADMA_PQ_MAX_BYTE_COUNT;
        }
    } while (slot_cnt);
}

static inline void
iop_desc_init_interrupt(struct iop_adma_desc_slot *desc,
    struct iop_adma_chan *chan)
{
    iop_desc_init_memcpy(desc, 1);
    iop_desc_set_byte_count(desc, chan, 0);
    iop_desc_set_dest_addr(desc, chan, 0);
    iop_desc_set_memcpy_src_addr(desc, 0);
}

#define iop_desc_set_zero_sum_src_addr iop_desc_set_xor_src_addr
#define iop_desc_set_pq_zero_sum_src_addr iop_desc_set_pq_src_addr

static inline void
iop_desc_set_pq_zero_sum_addr(struct iop_adma_desc_slot *desc, int pq_idx,
                  dma_addr_t *src)
{
    iop_desc_set_xor_src_addr(desc, pq_idx, src[pq_idx]);
    iop_desc_set_xor_src_addr(desc, pq_idx+1, src[pq_idx+1]);
}

static inline void iop_desc_set_next_desc(struct iop_adma_desc_slot *desc,
                    u32 next_desc_addr)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;

    iop_paranoia(hw_desc->next_desc);
    hw_desc->next_desc = next_desc_addr;
}

static inline u32 iop_desc_get_next_desc(struct iop_adma_desc_slot *desc)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    return hw_desc->next_desc;
}

static inline void iop_desc_clear_next_desc(struct iop_adma_desc_slot *desc)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    hw_desc->next_desc = 0;
}

static inline void iop_desc_set_block_fill_val(struct iop_adma_desc_slot *desc,
                        u32 val)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    hw_desc->block_fill_data = val;
}

static inline enum sum_check_flags
iop_desc_get_zero_result(struct iop_adma_desc_slot *desc)
{
    struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
    struct iop13xx_adma_desc_ctrl desc_ctrl = hw_desc->desc_ctrl_field;
    struct iop13xx_adma_byte_count byte_count = hw_desc->byte_count_field;
    enum sum_check_flags flags;

    BUG_ON(!(byte_count.tx_complete && desc_ctrl.zero_result));

    flags = byte_count.zero_result_err_q << SUM_CHECK_Q;
    flags |= byte_count.zero_result_err << SUM_CHECK_P;

    return flags;
}

static inline void iop_chan_append(struct iop_adma_chan *chan)
{
    u32 adma_accr;

    adma_accr = __raw_readl(ADMA_ACCR(chan));
    adma_accr |= 0x2;
    __raw_writel(adma_accr, ADMA_ACCR(chan));
}

static inline u32 iop_chan_get_status(struct iop_adma_chan *chan)
{
    return __raw_readl(ADMA_ACSR(chan));
}

static inline void iop_chan_disable(struct iop_adma_chan *chan)
{
    u32 adma_chan_ctrl = __raw_readl(ADMA_ACCR(chan));
    adma_chan_ctrl &= ~0x1;
    __raw_writel(adma_chan_ctrl, ADMA_ACCR(chan));
}

static inline void iop_chan_enable(struct iop_adma_chan *chan)
{
    u32 adma_chan_ctrl;

    adma_chan_ctrl = __raw_readl(ADMA_ACCR(chan));
    adma_chan_ctrl |= 0x1;
    __raw_writel(adma_chan_ctrl, ADMA_ACCR(chan));
}

static inline void iop_adma_device_clear_eot_status(struct iop_adma_chan *chan)
{
    u32 status = __raw_readl(ADMA_ACSR(chan));
    status &= (1 << 12);
    __raw_writel(status, ADMA_ACSR(chan));
}

static inline void iop_adma_device_clear_eoc_status(struct iop_adma_chan *chan)
{
    u32 status = __raw_readl(ADMA_ACSR(chan));
    status &= (1 << 11);
    __raw_writel(status, ADMA_ACSR(chan));
}

static inline void iop_adma_device_clear_err_status(struct iop_adma_chan *chan)
{
    u32 status = __raw_readl(ADMA_ACSR(chan));
    status &= (1 << 9) | (1 << 5) | (1 << 4) | (1 << 3);
    __raw_writel(status, ADMA_ACSR(chan));
}

static inline int
iop_is_err_int_parity(unsigned long status, struct iop_adma_chan *chan)
{
    return test_bit(9, &status);
}

static inline int
iop_is_err_mcu_abort(unsigned long status, struct iop_adma_chan *chan)
{
    return test_bit(5, &status);
}

static inline int
iop_is_err_int_tabort(unsigned long status, struct iop_adma_chan *chan)
{
    return test_bit(4, &status);
}

static inline int
iop_is_err_int_mabort(unsigned long status, struct iop_adma_chan *chan)
{
    return test_bit(3, &status);
}

static inline int
iop_is_err_pci_tabort(unsigned long status, struct iop_adma_chan *chan)
{
    return 0;
}

static inline int
iop_is_err_pci_mabort(unsigned long status, struct iop_adma_chan *chan)
{
    return 0;
}

static inline int
iop_is_err_split_tx(unsigned long status, struct iop_adma_chan *chan)
{
    return 0;
}

#endif /* _ADMA_H */