iop3xx: surface the iop3xx DMA and AAU 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:
* add support for > 1k zero sum buffer sizes
* added dma/aau platform devices to iq80321 and iq80332 setup
* fixed the calculation in iop_desc_is_aligned
* support xor buffer sizes larger than 16MB
* fix places where software descriptors are assumed to be contiguous, only
hardware descriptors are contiguous for up to a PAGE_SIZE buffer size
* convert to async_tx
* add interrupt support
* add platform devices for 80219 boards
* do not call platform register macros in driver code
* remove switch() statements for compatible register offsets/layouts
* change over to bitmap based capabilities
* remove unnecessary ARM assembly statement
* checkpatch.pl fixes
* gpl v2 only correction
* phys move to dma_async_tx_descriptor
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/include/asm-arm/hardware/iop3xx-adma.h b/include/asm-arm/hardware/iop3xx-adma.h
new file mode 100644
index 0000000..10834b5
--- /dev/null
+++ b/include/asm-arm/hardware/iop3xx-adma.h
@@ -0,0 +1,892 @@
+/*
+ * Copyright © 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>
+
+/* Memory copy units */
+#define DMA_CCR(chan) (chan->mmr_base + 0x0)
+#define DMA_CSR(chan) (chan->mmr_base + 0x4)
+#define DMA_DAR(chan) (chan->mmr_base + 0xc)
+#define DMA_NDAR(chan) (chan->mmr_base + 0x10)
+#define DMA_PADR(chan) (chan->mmr_base + 0x14)
+#define DMA_PUADR(chan) (chan->mmr_base + 0x18)
+#define DMA_LADR(chan) (chan->mmr_base + 0x1c)
+#define DMA_BCR(chan) (chan->mmr_base + 0x20)
+#define DMA_DCR(chan) (chan->mmr_base + 0x24)
+
+/* Application accelerator unit */
+#define AAU_ACR(chan) (chan->mmr_base + 0x0)
+#define AAU_ASR(chan) (chan->mmr_base + 0x4)
+#define AAU_ADAR(chan) (chan->mmr_base + 0x8)
+#define AAU_ANDAR(chan) (chan->mmr_base + 0xc)
+#define AAU_SAR(src, chan) (chan->mmr_base + (0x10 + ((src) << 2)))
+#define AAU_DAR(chan) (chan->mmr_base + 0x20)
+#define AAU_ABCR(chan) (chan->mmr_base + 0x24)
+#define AAU_ADCR(chan) (chan->mmr_base + 0x28)
+#define AAU_SAR_EDCR(src_edc) (chan->mmr_base + (0x02c + ((src_edc-4) << 2)))
+#define AAU_EDCR0_IDX 8
+#define AAU_EDCR1_IDX 17
+#define AAU_EDCR2_IDX 26
+
+#define DMA0_ID 0
+#define DMA1_ID 1
+#define AAU_ID 2
+
+struct iop3xx_aau_desc_ctrl {
+ unsigned int int_en:1;
+ unsigned int blk1_cmd_ctrl:3;
+ unsigned int blk2_cmd_ctrl:3;
+ unsigned int blk3_cmd_ctrl:3;
+ unsigned int blk4_cmd_ctrl:3;
+ unsigned int blk5_cmd_ctrl:3;
+ unsigned int blk6_cmd_ctrl:3;
+ unsigned int blk7_cmd_ctrl:3;
+ unsigned int blk8_cmd_ctrl:3;
+ unsigned int blk_ctrl:2;
+ unsigned int dual_xor_en:1;
+ unsigned int tx_complete:1;
+ unsigned int zero_result_err:1;
+ unsigned int zero_result_en:1;
+ unsigned int dest_write_en:1;
+};
+
+struct iop3xx_aau_e_desc_ctrl {
+ unsigned int reserved:1;
+ unsigned int blk1_cmd_ctrl:3;
+ unsigned int blk2_cmd_ctrl:3;
+ unsigned int blk3_cmd_ctrl:3;
+ unsigned int blk4_cmd_ctrl:3;
+ unsigned int blk5_cmd_ctrl:3;
+ unsigned int blk6_cmd_ctrl:3;
+ unsigned int blk7_cmd_ctrl:3;
+ unsigned int blk8_cmd_ctrl:3;
+ unsigned int reserved2:7;
+};
+
+struct iop3xx_dma_desc_ctrl {
+ unsigned int pci_transaction:4;
+ unsigned int int_en:1;
+ unsigned int dac_cycle_en:1;
+ unsigned int mem_to_mem_en:1;
+ unsigned int crc_data_tx_en:1;
+ unsigned int crc_gen_en:1;
+ unsigned int crc_seed_dis:1;
+ unsigned int reserved:21;
+ unsigned int crc_tx_complete:1;
+};
+
+struct iop3xx_desc_dma {
+ u32 next_desc;
+ union {
+ u32 pci_src_addr;
+ u32 pci_dest_addr;
+ u32 src_addr;
+ };
+ union {
+ u32 upper_pci_src_addr;
+ u32 upper_pci_dest_addr;
+ };
+ union {
+ u32 local_pci_src_addr;
+ u32 local_pci_dest_addr;
+ u32 dest_addr;
+ };
+ u32 byte_count;
+ union {
+ u32 desc_ctrl;
+ struct iop3xx_dma_desc_ctrl desc_ctrl_field;
+ };
+ u32 crc_addr;
+};
+
+struct iop3xx_desc_aau {
+ u32 next_desc;
+ u32 src[4];
+ u32 dest_addr;
+ u32 byte_count;
+ union {
+ u32 desc_ctrl;
+ struct iop3xx_aau_desc_ctrl desc_ctrl_field;
+ };
+ union {
+ u32 src_addr;
+ u32 e_desc_ctrl;
+ struct iop3xx_aau_e_desc_ctrl e_desc_ctrl_field;
+ } src_edc[31];
+};
+
+struct iop3xx_aau_gfmr {
+ unsigned int gfmr1:8;
+ unsigned int gfmr2:8;
+ unsigned int gfmr3:8;
+ unsigned int gfmr4:8;
+};
+
+struct iop3xx_desc_pq_xor {
+ u32 next_desc;
+ u32 src[3];
+ union {
+ u32 data_mult1;
+ struct iop3xx_aau_gfmr data_mult1_field;
+ };
+ u32 dest_addr;
+ u32 byte_count;
+ union {
+ u32 desc_ctrl;
+ struct iop3xx_aau_desc_ctrl desc_ctrl_field;
+ };
+ union {
+ u32 src_addr;
+ u32 e_desc_ctrl;
+ struct iop3xx_aau_e_desc_ctrl e_desc_ctrl_field;
+ u32 data_multiplier;
+ struct iop3xx_aau_gfmr data_mult_field;
+ u32 reserved;
+ } src_edc_gfmr[19];
+};
+
+struct iop3xx_desc_dual_xor {
+ u32 next_desc;
+ u32 src0_addr;
+ u32 src1_addr;
+ u32 h_src_addr;
+ u32 d_src_addr;
+ u32 h_dest_addr;
+ u32 byte_count;
+ union {
+ u32 desc_ctrl;
+ struct iop3xx_aau_desc_ctrl desc_ctrl_field;
+ };
+ u32 d_dest_addr;
+};
+
+union iop3xx_desc {
+ struct iop3xx_desc_aau *aau;
+ struct iop3xx_desc_dma *dma;
+ struct iop3xx_desc_pq_xor *pq_xor;
+ struct iop3xx_desc_dual_xor *dual_xor;
+ void *ptr;
+};
+
+static inline int iop_adma_get_max_xor(void)
+{
+ return 32;
+}
+
+static inline u32 iop_chan_get_current_descriptor(struct iop_adma_chan *chan)
+{
+ int id = chan->device->id;
+
+ switch (id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ return __raw_readl(DMA_DAR(chan));
+ case AAU_ID:
+ return __raw_readl(AAU_ADAR(chan));
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+static inline void iop_chan_set_next_descriptor(struct iop_adma_chan *chan,
+ u32 next_desc_addr)
+{
+ int id = chan->device->id;
+
+ switch (id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ __raw_writel(next_desc_addr, DMA_NDAR(chan));
+ break;
+ case AAU_ID:
+ __raw_writel(next_desc_addr, AAU_ANDAR(chan));
+ break;
+ }
+
+}
+
+#define IOP_ADMA_STATUS_BUSY (1 << 10)
+#define IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT (1024)
+#define IOP_ADMA_XOR_MAX_BYTE_COUNT (16 * 1024 * 1024)
+#define IOP_ADMA_MAX_BYTE_COUNT (16 * 1024 * 1024)
+
+static inline int iop_chan_is_busy(struct iop_adma_chan *chan)
+{
+ u32 status = __raw_readl(DMA_CSR(chan));
+ return (status & IOP_ADMA_STATUS_BUSY) ? 1 : 0;
+}
+
+static inline int iop_desc_is_aligned(struct iop_adma_desc_slot *desc,
+ int num_slots)
+{
+ /* num_slots will only ever be 1, 2, 4, or 8 */
+ return (desc->idx & (num_slots - 1)) ? 0 : 1;
+}
+
+/* to do: support large (i.e. > hw max) buffer sizes */
+static inline int iop_chan_memcpy_slot_count(size_t len, int *slots_per_op)
+{
+ *slots_per_op = 1;
+ return 1;
+}
+
+/* to do: support large (i.e. > hw max) buffer sizes */
+static inline int iop_chan_memset_slot_count(size_t len, int *slots_per_op)
+{
+ *slots_per_op = 1;
+ return 1;
+}
+
+static inline int iop3xx_aau_xor_slot_count(size_t len, int src_cnt,
+ int *slots_per_op)
+{
+ const static int slot_count_table[] = { 0,
+ 1, 1, 1, 1, /* 01 - 04 */
+ 2, 2, 2, 2, /* 05 - 08 */
+ 4, 4, 4, 4, /* 09 - 12 */
+ 4, 4, 4, 4, /* 13 - 16 */
+ 8, 8, 8, 8, /* 17 - 20 */
+ 8, 8, 8, 8, /* 21 - 24 */
+ 8, 8, 8, 8, /* 25 - 28 */
+ 8, 8, 8, 8, /* 29 - 32 */
+ };
+ *slots_per_op = slot_count_table[src_cnt];
+ return *slots_per_op;
+}
+
+static inline int
+iop_chan_interrupt_slot_count(int *slots_per_op, struct iop_adma_chan *chan)
+{
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ return iop_chan_memcpy_slot_count(0, slots_per_op);
+ case AAU_ID:
+ return iop3xx_aau_xor_slot_count(0, 2, slots_per_op);
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+static inline int iop_chan_xor_slot_count(size_t len, int src_cnt,
+ int *slots_per_op)
+{
+ int slot_cnt = iop3xx_aau_xor_slot_count(len, src_cnt, slots_per_op);
+
+ if (len <= IOP_ADMA_XOR_MAX_BYTE_COUNT)
+ return slot_cnt;
+
+ len -= IOP_ADMA_XOR_MAX_BYTE_COUNT;
+ while (len > IOP_ADMA_XOR_MAX_BYTE_COUNT) {
+ len -= IOP_ADMA_XOR_MAX_BYTE_COUNT;
+ slot_cnt += *slots_per_op;
+ }
+
+ if (len)
+ slot_cnt += *slots_per_op;
+
+ return slot_cnt;
+}
+
+/* zero sum on iop3xx is limited to 1k at a time so it requires multiple
+ * descriptors
+ */
+static inline int iop_chan_zero_sum_slot_count(size_t len, int src_cnt,
+ int *slots_per_op)
+{
+ int slot_cnt = iop3xx_aau_xor_slot_count(len, src_cnt, slots_per_op);
+
+ if (len <= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT)
+ return slot_cnt;
+
+ len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
+ while (len > IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
+ len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
+ slot_cnt += *slots_per_op;
+ }
+
+ if (len)
+ slot_cnt += *slots_per_op;
+
+ return slot_cnt;
+}
+
+static inline u32 iop_desc_get_dest_addr(struct iop_adma_desc_slot *desc,
+ struct iop_adma_chan *chan)
+{
+ union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
+
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ return hw_desc.dma->dest_addr;
+ case AAU_ID:
+ return hw_desc.aau->dest_addr;
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+static inline u32 iop_desc_get_byte_count(struct iop_adma_desc_slot *desc,
+ struct iop_adma_chan *chan)
+{
+ union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
+
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ return hw_desc.dma->byte_count;
+ case AAU_ID:
+ return hw_desc.aau->byte_count;
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+/* translate the src_idx to a descriptor word index */
+static inline int __desc_idx(int src_idx)
+{
+ const static int desc_idx_table[] = { 0, 0, 0, 0,
+ 0, 1, 2, 3,
+ 5, 6, 7, 8,
+ 9, 10, 11, 12,
+ 14, 15, 16, 17,
+ 18, 19, 20, 21,
+ 23, 24, 25, 26,
+ 27, 28, 29, 30,
+ };
+
+ return desc_idx_table[src_idx];
+}
+
+static inline u32 iop_desc_get_src_addr(struct iop_adma_desc_slot *desc,
+ struct iop_adma_chan *chan,
+ int src_idx)
+{
+ union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
+
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ return hw_desc.dma->src_addr;
+ case AAU_ID:
+ break;
+ default:
+ BUG();
+ }
+
+ if (src_idx < 4)
+ return hw_desc.aau->src[src_idx];
+ else
+ return hw_desc.aau->src_edc[__desc_idx(src_idx)].src_addr;
+}
+
+static inline void iop3xx_aau_desc_set_src_addr(struct iop3xx_desc_aau *hw_desc,
+ int src_idx, dma_addr_t addr)
+{
+ if (src_idx < 4)
+ hw_desc->src[src_idx] = addr;
+ else
+ hw_desc->src_edc[__desc_idx(src_idx)].src_addr = addr;
+}
+
+static inline void
+iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, int int_en)
+{
+ struct iop3xx_desc_dma *hw_desc = desc->hw_desc;
+ union {
+ u32 value;
+ struct iop3xx_dma_desc_ctrl field;
+ } u_desc_ctrl;
+
+ u_desc_ctrl.value = 0;
+ u_desc_ctrl.field.mem_to_mem_en = 1;
+ u_desc_ctrl.field.pci_transaction = 0xe; /* memory read block */
+ u_desc_ctrl.field.int_en = int_en;
+ hw_desc->desc_ctrl = u_desc_ctrl.value;
+ hw_desc->upper_pci_src_addr = 0;
+ hw_desc->crc_addr = 0;
+}
+
+static inline void
+iop_desc_init_memset(struct iop_adma_desc_slot *desc, int int_en)
+{
+ struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
+ union {
+ u32 value;
+ struct iop3xx_aau_desc_ctrl field;
+ } u_desc_ctrl;
+
+ u_desc_ctrl.value = 0;
+ u_desc_ctrl.field.blk1_cmd_ctrl = 0x2; /* memory block fill */
+ u_desc_ctrl.field.dest_write_en = 1;
+ u_desc_ctrl.field.int_en = int_en;
+ hw_desc->desc_ctrl = u_desc_ctrl.value;
+}
+
+static inline u32
+iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt, int int_en)
+{
+ int i, shift;
+ u32 edcr;
+ union {
+ u32 value;
+ struct iop3xx_aau_desc_ctrl field;
+ } u_desc_ctrl;
+
+ u_desc_ctrl.value = 0;
+ switch (src_cnt) {
+ case 25 ... 32:
+ u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
+ edcr = 0;
+ shift = 1;
+ for (i = 24; i < src_cnt; i++) {
+ edcr |= (1 << shift);
+ shift += 3;
+ }
+ hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = edcr;
+ src_cnt = 24;
+ /* fall through */
+ case 17 ... 24:
+ if (!u_desc_ctrl.field.blk_ctrl) {
+ hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
+ u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
+ }
+ edcr = 0;
+ shift = 1;
+ for (i = 16; i < src_cnt; i++) {
+ edcr |= (1 << shift);
+ shift += 3;
+ }
+ hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = edcr;
+ src_cnt = 16;
+ /* fall through */
+ case 9 ... 16:
+ if (!u_desc_ctrl.field.blk_ctrl)
+ u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
+ edcr = 0;
+ shift = 1;
+ for (i = 8; i < src_cnt; i++) {
+ edcr |= (1 << shift);
+ shift += 3;
+ }
+ hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = edcr;
+ src_cnt = 8;
+ /* fall through */
+ case 2 ... 8:
+ shift = 1;
+ for (i = 0; i < src_cnt; i++) {
+ u_desc_ctrl.value |= (1 << shift);
+ shift += 3;
+ }
+
+ if (!u_desc_ctrl.field.blk_ctrl && src_cnt > 4)
+ u_desc_ctrl.field.blk_ctrl = 0x1; /* use mini-desc */
+ }
+
+ u_desc_ctrl.field.dest_write_en = 1;
+ u_desc_ctrl.field.blk1_cmd_ctrl = 0x7; /* direct fill */
+ u_desc_ctrl.field.int_en = int_en;
+ hw_desc->desc_ctrl = u_desc_ctrl.value;
+
+ return u_desc_ctrl.value;
+}
+
+static inline void
+iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
+{
+ iop3xx_desc_init_xor(desc->hw_desc, src_cnt, int_en);
+}
+
+/* return the number of operations */
+static inline int
+iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
+{
+ int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
+ struct iop3xx_desc_aau *hw_desc, *prev_hw_desc, *iter;
+ union {
+ u32 value;
+ struct iop3xx_aau_desc_ctrl field;
+ } u_desc_ctrl;
+ int i, j;
+
+ hw_desc = desc->hw_desc;
+
+ for (i = 0, j = 0; (slot_cnt -= slots_per_op) >= 0;
+ i += slots_per_op, j++) {
+ iter = iop_hw_desc_slot_idx(hw_desc, i);
+ u_desc_ctrl.value = iop3xx_desc_init_xor(iter, src_cnt, int_en);
+ u_desc_ctrl.field.dest_write_en = 0;
+ u_desc_ctrl.field.zero_result_en = 1;
+ u_desc_ctrl.field.int_en = int_en;
+ iter->desc_ctrl = u_desc_ctrl.value;
+
+ /* for the subsequent descriptors preserve the store queue
+ * and chain them together
+ */
+ if (i) {
+ prev_hw_desc =
+ iop_hw_desc_slot_idx(hw_desc, i - slots_per_op);
+ prev_hw_desc->next_desc =
+ (u32) (desc->async_tx.phys + (i << 5));
+ }
+ }
+
+ return j;
+}
+
+static inline void
+iop_desc_init_null_xor(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
+{
+ struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
+ union {
+ u32 value;
+ struct iop3xx_aau_desc_ctrl field;
+ } u_desc_ctrl;
+
+ u_desc_ctrl.value = 0;
+ switch (src_cnt) {
+ case 25 ... 32:
+ u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
+ hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
+ /* fall through */
+ case 17 ... 24:
+ if (!u_desc_ctrl.field.blk_ctrl) {
+ hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
+ u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
+ }
+ hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = 0;
+ /* fall through */
+ case 9 ... 16:
+ if (!u_desc_ctrl.field.blk_ctrl)
+ u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
+ hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = 0;
+ /* fall through */
+ case 1 ... 8:
+ if (!u_desc_ctrl.field.blk_ctrl && src_cnt > 4)
+ u_desc_ctrl.field.blk_ctrl = 0x1; /* use mini-desc */
+ }
+
+ u_desc_ctrl.field.dest_write_en = 0;
+ u_desc_ctrl.field.int_en = int_en;
+ 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)
+{
+ union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
+
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ hw_desc.dma->byte_count = byte_count;
+ break;
+ case AAU_ID:
+ hw_desc.aau->byte_count = byte_count;
+ break;
+ default:
+ BUG();
+ }
+}
+
+static inline void
+iop_desc_init_interrupt(struct iop_adma_desc_slot *desc,
+ struct iop_adma_chan *chan)
+{
+ union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
+
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ iop_desc_init_memcpy(desc, 1);
+ hw_desc.dma->byte_count = 0;
+ hw_desc.dma->dest_addr = 0;
+ hw_desc.dma->src_addr = 0;
+ break;
+ case AAU_ID:
+ iop_desc_init_null_xor(desc, 2, 1);
+ hw_desc.aau->byte_count = 0;
+ hw_desc.aau->dest_addr = 0;
+ hw_desc.aau->src[0] = 0;
+ hw_desc.aau->src[1] = 0;
+ break;
+ default:
+ BUG();
+ }
+}
+
+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 iop3xx_desc_aau *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)
+{
+ union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
+
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ hw_desc.dma->dest_addr = addr;
+ break;
+ case AAU_ID:
+ hw_desc.aau->dest_addr = addr;
+ break;
+ default:
+ BUG();
+ }
+}
+
+static inline void iop_desc_set_memcpy_src_addr(struct iop_adma_desc_slot *desc,
+ dma_addr_t addr)
+{
+ struct iop3xx_desc_dma *hw_desc = desc->hw_desc;
+ hw_desc->src_addr = addr;
+}
+
+static inline void
+iop_desc_set_zero_sum_src_addr(struct iop_adma_desc_slot *desc, int src_idx,
+ dma_addr_t addr)
+{
+
+ struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
+ int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
+ int i;
+
+ for (i = 0; (slot_cnt -= slots_per_op) >= 0;
+ i += slots_per_op, addr += IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
+ iter = iop_hw_desc_slot_idx(hw_desc, i);
+ iop3xx_aau_desc_set_src_addr(iter, src_idx, addr);
+ }
+}
+
+static inline void iop_desc_set_xor_src_addr(struct iop_adma_desc_slot *desc,
+ int src_idx, dma_addr_t addr)
+{
+
+ struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
+ int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
+ int i;
+
+ for (i = 0; (slot_cnt -= slots_per_op) >= 0;
+ i += slots_per_op, addr += IOP_ADMA_XOR_MAX_BYTE_COUNT) {
+ iter = iop_hw_desc_slot_idx(hw_desc, i);
+ iop3xx_aau_desc_set_src_addr(iter, src_idx, addr);
+ }
+}
+
+static inline void iop_desc_set_next_desc(struct iop_adma_desc_slot *desc,
+ u32 next_desc_addr)
+{
+ /* hw_desc->next_desc is the same location for all channels */
+ union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
+ BUG_ON(hw_desc.dma->next_desc);
+ hw_desc.dma->next_desc = next_desc_addr;
+}
+
+static inline u32 iop_desc_get_next_desc(struct iop_adma_desc_slot *desc)
+{
+ /* hw_desc->next_desc is the same location for all channels */
+ union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
+ return hw_desc.dma->next_desc;
+}
+
+static inline void iop_desc_clear_next_desc(struct iop_adma_desc_slot *desc)
+{
+ /* hw_desc->next_desc is the same location for all channels */
+ union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
+ hw_desc.dma->next_desc = 0;
+}
+
+static inline void iop_desc_set_block_fill_val(struct iop_adma_desc_slot *desc,
+ u32 val)
+{
+ struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
+ hw_desc->src[0] = val;
+}
+
+static inline int iop_desc_get_zero_result(struct iop_adma_desc_slot *desc)
+{
+ struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
+ struct iop3xx_aau_desc_ctrl desc_ctrl = hw_desc->desc_ctrl_field;
+
+ BUG_ON(!(desc_ctrl.tx_complete && desc_ctrl.zero_result_en));
+ return desc_ctrl.zero_result_err;
+}
+
+static inline void iop_chan_append(struct iop_adma_chan *chan)
+{
+ u32 dma_chan_ctrl;
+ /* workaround dropped interrupts on 3xx */
+ mod_timer(&chan->cleanup_watchdog, jiffies + msecs_to_jiffies(3));
+
+ dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
+ dma_chan_ctrl |= 0x2;
+ __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
+}
+
+static inline void iop_chan_idle(int busy, struct iop_adma_chan *chan)
+{
+ if (!busy)
+ del_timer(&chan->cleanup_watchdog);
+}
+
+static inline u32 iop_chan_get_status(struct iop_adma_chan *chan)
+{
+ return __raw_readl(DMA_CSR(chan));
+}
+
+static inline void iop_chan_disable(struct iop_adma_chan *chan)
+{
+ u32 dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
+ dma_chan_ctrl &= ~1;
+ __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
+}
+
+static inline void iop_chan_enable(struct iop_adma_chan *chan)
+{
+ u32 dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
+
+ dma_chan_ctrl |= 1;
+ __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
+}
+
+static inline void iop_adma_device_clear_eot_status(struct iop_adma_chan *chan)
+{
+ u32 status = __raw_readl(DMA_CSR(chan));
+ status &= (1 << 9);
+ __raw_writel(status, DMA_CSR(chan));
+}
+
+static inline void iop_adma_device_clear_eoc_status(struct iop_adma_chan *chan)
+{
+ u32 status = __raw_readl(DMA_CSR(chan));
+ status &= (1 << 8);
+ __raw_writel(status, DMA_CSR(chan));
+}
+
+static inline void iop_adma_device_clear_err_status(struct iop_adma_chan *chan)
+{
+ u32 status = __raw_readl(DMA_CSR(chan));
+
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ status &= (1 << 5) | (1 << 3) | (1 << 2) | (1 << 1);
+ break;
+ case AAU_ID:
+ status &= (1 << 5);
+ break;
+ default:
+ BUG();
+ }
+
+ __raw_writel(status, DMA_CSR(chan));
+}
+
+static inline int
+iop_is_err_int_parity(unsigned long status, struct iop_adma_chan *chan)
+{
+ return 0;
+}
+
+static inline int
+iop_is_err_mcu_abort(unsigned long status, struct iop_adma_chan *chan)
+{
+ return 0;
+}
+
+static inline int
+iop_is_err_int_tabort(unsigned long status, struct iop_adma_chan *chan)
+{
+ return 0;
+}
+
+static inline int
+iop_is_err_int_mabort(unsigned long status, struct iop_adma_chan *chan)
+{
+ return test_bit(5, &status);
+}
+
+static inline int
+iop_is_err_pci_tabort(unsigned long status, struct iop_adma_chan *chan)
+{
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ return test_bit(2, &status);
+ default:
+ return 0;
+ }
+}
+
+static inline int
+iop_is_err_pci_mabort(unsigned long status, struct iop_adma_chan *chan)
+{
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ return test_bit(3, &status);
+ default:
+ return 0;
+ }
+}
+
+static inline int
+iop_is_err_split_tx(unsigned long status, struct iop_adma_chan *chan)
+{
+ switch (chan->device->id) {
+ case DMA0_ID:
+ case DMA1_ID:
+ return test_bit(1, &status);
+ default:
+ return 0;
+ }
+}
+#endif /* _ADMA_H */