iop13xx: surface the iop13xx adma units to the iop-adma driver

Adds the platform device definitions and the architecture specific
support routines (i.e. register initialization and descriptor formats) for the
iop-adma driver.

Changelog:
* added 'descriptor pool size' to the platform data
* add base support for buffer sizes larger than 16MB (hw max)
* build error fix from Kirill A. Shutemov
* rebase for async_tx changes
* add interrupt support
* do not call platform register macros in driver code
* remove unnecessary ARM assembly statement
* checkpatch.pl fixes
* gpl v2 only correction

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 544 insertions, 0 deletions

diff --git a/include/asm-arm/arch-iop13xx/adma.h b/include/asm-arm/arch-iop13xx/adma.h
new file mode 100644
index 000000000000..04006c1c5fd7
--- /dev/null
+++ b/include/asm-arm/arch-iop13xx/adma.h
@@ -0,0 +1,544 @@
+/*
+ * 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 <asm/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;
+}
+
+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)
+{
+        int num_slots;
+        /* slots_to_find = 1 for basic descriptor + 1 per 4 sources above 1
+         * (1 source => 8 bytes) (1 slot => 32 bytes)
+         */
+        num_slots = 1 + (((src_cnt - 1) << 3) >> 5);
+        if (((src_cnt - 1) << 3) & 0x1f)
+                num_slots++;
+
+        *slots_per_op = num_slots;
+
+        return num_slots;
+}
+
+#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_chan_zero_sum_slot_count(l, s, o) iop_chan_xor_slot_count(l, s, o)
+
+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_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, int int_en)
+{
+        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 = int_en;
+        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, int int_en)
+{
+        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 = int_en;
+        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, int int_en)
+{
+        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 = int_en;
+        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, int int_en)
+{
+        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 = int_en;
+        hw_desc->desc_ctrl = u_desc_ctrl.value;
+        hw_desc->crc_addr = 0;
+
+        return 1;
+}
+
+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;
+                }
+        }
+}
+
+
+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_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_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
+
+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;
+        BUG_ON(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 int 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;
+
+        BUG_ON(!(byte_count.tx_complete && desc_ctrl.zero_result));
+
+        if (desc_ctrl.pq_xfer_en)
+                return byte_count.zero_result_err_q;
+        else
+                return byte_count.zero_result_err;
+}
+
+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 void iop_chan_idle(int busy, struct iop_adma_chan *chan)
+{
+        do { } while (0);
+}
+
+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 */