1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2007-2010 Freescale Semiconductor, Inc. All rights reserved. 4 * 5 * Author: 6 * Zhang Wei <wei.zhang@freescale.com>, Jul 2007 7 * Ebony Zhu <ebony.zhu@freescale.com>, May 2007 8 */ 9 #ifndef __DMA_FSLDMA_H 10 #define __DMA_FSLDMA_H 11 12 #include <linux/device.h> 13 #include <linux/dmapool.h> 14 #include <linux/dmaengine.h> 15 16 /* Define data structures needed by Freescale 17 * MPC8540 and MPC8349 DMA controller. 18 */ 19 #define FSL_DMA_MR_CS 0x00000001 20 #define FSL_DMA_MR_CC 0x00000002 21 #define FSL_DMA_MR_CA 0x00000008 22 #define FSL_DMA_MR_EIE 0x00000040 23 #define FSL_DMA_MR_XFE 0x00000020 24 #define FSL_DMA_MR_EOLNIE 0x00000100 25 #define FSL_DMA_MR_EOLSIE 0x00000080 26 #define FSL_DMA_MR_EOSIE 0x00000200 27 #define FSL_DMA_MR_CDSM 0x00000010 28 #define FSL_DMA_MR_CTM 0x00000004 29 #define FSL_DMA_MR_EMP_EN 0x00200000 30 #define FSL_DMA_MR_EMS_EN 0x00040000 31 #define FSL_DMA_MR_DAHE 0x00002000 32 #define FSL_DMA_MR_SAHE 0x00001000 33 34 #define FSL_DMA_MR_SAHTS_MASK 0x0000C000 35 #define FSL_DMA_MR_DAHTS_MASK 0x00030000 36 #define FSL_DMA_MR_BWC_MASK 0x0f000000 37 38 /* 39 * Bandwidth/pause control determines how many bytes a given 40 * channel is allowed to transfer before the DMA engine pauses 41 * the current channel and switches to the next channel 42 */ 43 #define FSL_DMA_MR_BWC 0x0A000000 44 45 /* Special MR definition for MPC8349 */ 46 #define FSL_DMA_MR_EOTIE 0x00000080 47 #define FSL_DMA_MR_PRC_RM 0x00000800 48 49 #define FSL_DMA_SR_CH 0x00000020 50 #define FSL_DMA_SR_PE 0x00000010 51 #define FSL_DMA_SR_CB 0x00000004 52 #define FSL_DMA_SR_TE 0x00000080 53 #define FSL_DMA_SR_EOSI 0x00000002 54 #define FSL_DMA_SR_EOLSI 0x00000001 55 #define FSL_DMA_SR_EOCDI 0x00000001 56 #define FSL_DMA_SR_EOLNI 0x00000008 57 58 #define FSL_DMA_SATR_SBPATMU 0x20000000 59 #define FSL_DMA_SATR_STRANSINT_RIO 0x00c00000 60 #define FSL_DMA_SATR_SREADTYPE_SNOOP_READ 0x00050000 61 #define FSL_DMA_SATR_SREADTYPE_BP_IORH 0x00020000 62 #define FSL_DMA_SATR_SREADTYPE_BP_NREAD 0x00040000 63 #define FSL_DMA_SATR_SREADTYPE_BP_MREAD 0x00070000 64 65 #define FSL_DMA_DATR_DBPATMU 0x20000000 66 #define FSL_DMA_DATR_DTRANSINT_RIO 0x00c00000 67 #define FSL_DMA_DATR_DWRITETYPE_SNOOP_WRITE 0x00050000 68 #define FSL_DMA_DATR_DWRITETYPE_BP_FLUSH 0x00010000 69 70 #define FSL_DMA_EOL ((u64)0x1) 71 #define FSL_DMA_SNEN ((u64)0x10) 72 #define FSL_DMA_EOSIE 0x8 73 #define FSL_DMA_NLDA_MASK (~(u64)0x1f) 74 75 #define FSL_DMA_BCR_MAX_CNT 0x03ffffffu 76 77 #define FSL_DMA_DGSR_TE 0x80 78 #define FSL_DMA_DGSR_CH 0x20 79 #define FSL_DMA_DGSR_PE 0x10 80 #define FSL_DMA_DGSR_EOLNI 0x08 81 #define FSL_DMA_DGSR_CB 0x04 82 #define FSL_DMA_DGSR_EOSI 0x02 83 #define FSL_DMA_DGSR_EOLSI 0x01 84 85 #define FSL_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ 86 BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ 87 BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \ 88 BIT(DMA_SLAVE_BUSWIDTH_8_BYTES)) 89 typedef u64 __bitwise v64; 90 typedef u32 __bitwise v32; 91 92 struct fsl_dma_ld_hw { 93 v64 src_addr; 94 v64 dst_addr; 95 v64 next_ln_addr; 96 v32 count; 97 v32 reserve; 98 } __attribute__((aligned(32))); 99 100 struct fsl_desc_sw { 101 struct fsl_dma_ld_hw hw; 102 struct list_head node; 103 struct list_head tx_list; 104 struct dma_async_tx_descriptor async_tx; 105 } __attribute__((aligned(32))); 106 107 struct fsldma_chan_regs { 108 u32 mr; /* 0x00 - Mode Register */ 109 u32 sr; /* 0x04 - Status Register */ 110 u64 cdar; /* 0x08 - Current descriptor address register */ 111 u64 sar; /* 0x10 - Source Address Register */ 112 u64 dar; /* 0x18 - Destination Address Register */ 113 u32 bcr; /* 0x20 - Byte Count Register */ 114 u64 ndar; /* 0x24 - Next Descriptor Address Register */ 115 }; 116 117 struct fsldma_chan; 118 #define FSL_DMA_MAX_CHANS_PER_DEVICE 8 119 120 struct fsldma_device { 121 void __iomem *regs; /* DGSR register base */ 122 struct device *dev; 123 struct dma_device common; 124 struct fsldma_chan *chan[FSL_DMA_MAX_CHANS_PER_DEVICE]; 125 u32 feature; /* The same as DMA channels */ 126 int irq; /* Channel IRQ */ 127 int addr_bits; /* DMA addressing bits supported */ 128 }; 129 130 /* Define macros for fsldma_chan->feature property */ 131 #define FSL_DMA_LITTLE_ENDIAN 0x00000000 132 #define FSL_DMA_BIG_ENDIAN 0x00000001 133 134 #define FSL_DMA_IP_MASK 0x00000ff0 135 #define FSL_DMA_IP_85XX 0x00000010 136 #define FSL_DMA_IP_83XX 0x00000020 137 138 #define FSL_DMA_CHAN_PAUSE_EXT 0x00001000 139 #define FSL_DMA_CHAN_START_EXT 0x00002000 140 141 #ifdef CONFIG_PM 142 struct fsldma_chan_regs_save { 143 u32 mr; 144 }; 145 146 enum fsldma_pm_state { 147 RUNNING = 0, 148 SUSPENDED, 149 }; 150 #endif 151 152 struct fsldma_chan { 153 char name[8]; /* Channel name */ 154 struct fsldma_chan_regs __iomem *regs; 155 spinlock_t desc_lock; /* Descriptor operation lock */ 156 /* 157 * Descriptors which are queued to run, but have not yet been 158 * submitted to the hardware for execution 159 */ 160 struct list_head ld_pending; 161 /* 162 * Descriptors which are currently being executed by the hardware 163 */ 164 struct list_head ld_running; 165 /* 166 * Descriptors which have finished execution by the hardware. These 167 * descriptors have already had their cleanup actions run. They are 168 * waiting for the ACK bit to be set by the async_tx API. 169 */ 170 struct list_head ld_completed; /* Link descriptors queue */ 171 struct dma_chan common; /* DMA common channel */ 172 struct dma_pool *desc_pool; /* Descriptors pool */ 173 struct device *dev; /* Channel device */ 174 int irq; /* Channel IRQ */ 175 int id; /* Raw id of this channel */ 176 struct tasklet_struct tasklet; 177 u32 feature; 178 bool idle; /* DMA controller is idle */ 179 #ifdef CONFIG_PM 180 struct fsldma_chan_regs_save regs_save; 181 enum fsldma_pm_state pm_state; 182 #endif 183 184 void (*toggle_ext_pause)(struct fsldma_chan *fsl_chan, int enable); 185 void (*toggle_ext_start)(struct fsldma_chan *fsl_chan, int enable); 186 void (*set_src_loop_size)(struct fsldma_chan *fsl_chan, int size); 187 void (*set_dst_loop_size)(struct fsldma_chan *fsl_chan, int size); 188 void (*set_request_count)(struct fsldma_chan *fsl_chan, int size); 189 }; 190 191 #define to_fsl_chan(chan) container_of(chan, struct fsldma_chan, common) 192 #define to_fsl_desc(lh) container_of(lh, struct fsl_desc_sw, node) 193 #define tx_to_fsl_desc(tx) container_of(tx, struct fsl_desc_sw, async_tx) 194 195 #ifdef CONFIG_PPC 196 #define fsl_ioread32(p) in_le32(p) 197 #define fsl_ioread32be(p) in_be32(p) 198 #define fsl_iowrite32(v, p) out_le32(p, v) 199 #define fsl_iowrite32be(v, p) out_be32(p, v) 200 201 #ifdef __powerpc64__ 202 #define fsl_ioread64(p) in_le64(p) 203 #define fsl_ioread64be(p) in_be64(p) 204 #define fsl_iowrite64(v, p) out_le64(p, v) 205 #define fsl_iowrite64be(v, p) out_be64(p, v) 206 #else 207 static u64 fsl_ioread64(const u64 __iomem *addr) 208 { 209 u32 val_lo = in_le32((u32 __iomem *)addr); 210 u32 val_hi = in_le32((u32 __iomem *)addr + 1); 211 212 return ((u64)val_hi << 32) + val_lo; 213 } 214 215 static void fsl_iowrite64(u64 val, u64 __iomem *addr) 216 { 217 out_le32((u32 __iomem *)addr + 1, val >> 32); 218 out_le32((u32 __iomem *)addr, (u32)val); 219 } 220 221 static u64 fsl_ioread64be(const u64 __iomem *addr) 222 { 223 u32 val_hi = in_be32((u32 __iomem *)addr); 224 u32 val_lo = in_be32((u32 __iomem *)addr + 1); 225 226 return ((u64)val_hi << 32) + val_lo; 227 } 228 229 static void fsl_iowrite64be(u64 val, u64 __iomem *addr) 230 { 231 out_be32((u32 __iomem *)addr, val >> 32); 232 out_be32((u32 __iomem *)addr + 1, (u32)val); 233 } 234 #endif 235 #endif 236 237 #if defined(CONFIG_ARM64) || defined(CONFIG_ARM) 238 #define fsl_ioread32(p) ioread32(p) 239 #define fsl_ioread32be(p) ioread32be(p) 240 #define fsl_iowrite32(v, p) iowrite32(v, p) 241 #define fsl_iowrite32be(v, p) iowrite32be(v, p) 242 #define fsl_ioread64(p) ioread64(p) 243 #define fsl_ioread64be(p) ioread64be(p) 244 #define fsl_iowrite64(v, p) iowrite64(v, p) 245 #define fsl_iowrite64be(v, p) iowrite64be(v, p) 246 #endif 247 248 #define FSL_DMA_IN(fsl_dma, addr, width) \ 249 (((fsl_dma)->feature & FSL_DMA_BIG_ENDIAN) ? \ 250 fsl_ioread##width##be(addr) : fsl_ioread##width(addr)) 251 252 #define FSL_DMA_OUT(fsl_dma, addr, val, width) \ 253 (((fsl_dma)->feature & FSL_DMA_BIG_ENDIAN) ? \ 254 fsl_iowrite##width##be(val, addr) : fsl_iowrite \ 255 ##width(val, addr)) 256 257 #define DMA_TO_CPU(fsl_chan, d, width) \ 258 (((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \ 259 be##width##_to_cpu((__force __be##width)(v##width)d) : \ 260 le##width##_to_cpu((__force __le##width)(v##width)d)) 261 #define CPU_TO_DMA(fsl_chan, c, width) \ 262 (((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \ 263 (__force v##width)cpu_to_be##width(c) : \ 264 (__force v##width)cpu_to_le##width(c)) 265 266 #endif /* __DMA_FSLDMA_H */ 267