1 // SPDX-License-Identifier: GPL-2.0 2 // (C) 2017-2018 Synopsys, Inc. (www.synopsys.com) 3 4 /* 5 * Synopsys DesignWare AXI DMA Controller driver. 6 * 7 * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> 8 */ 9 10 #ifndef _AXI_DMA_PLATFORM_H 11 #define _AXI_DMA_PLATFORM_H 12 13 #include <linux/bitops.h> 14 #include <linux/clk.h> 15 #include <linux/device.h> 16 #include <linux/dmaengine.h> 17 #include <linux/types.h> 18 19 #include "../virt-dma.h" 20 21 #define DMAC_MAX_CHANNELS 8 22 #define DMAC_MAX_MASTERS 2 23 #define DMAC_MAX_BLK_SIZE 0x200000 24 25 struct dw_axi_dma_hcfg { 26 u32 nr_channels; 27 u32 nr_masters; 28 u32 m_data_width; 29 u32 block_size[DMAC_MAX_CHANNELS]; 30 u32 priority[DMAC_MAX_CHANNELS]; 31 /* maximum supported axi burst length */ 32 u32 axi_rw_burst_len; 33 bool restrict_axi_burst_len; 34 }; 35 36 struct axi_dma_chan { 37 struct axi_dma_chip *chip; 38 void __iomem *chan_regs; 39 u8 id; 40 atomic_t descs_allocated; 41 42 struct virt_dma_chan vc; 43 44 /* these other elements are all protected by vc.lock */ 45 bool is_paused; 46 }; 47 48 struct dw_axi_dma { 49 struct dma_device dma; 50 struct dw_axi_dma_hcfg *hdata; 51 struct dma_pool *desc_pool; 52 53 /* channels */ 54 struct axi_dma_chan *chan; 55 }; 56 57 struct axi_dma_chip { 58 struct device *dev; 59 int irq; 60 void __iomem *regs; 61 struct clk *core_clk; 62 struct clk *cfgr_clk; 63 struct dw_axi_dma *dw; 64 }; 65 66 /* LLI == Linked List Item */ 67 struct __packed axi_dma_lli { 68 __le64 sar; 69 __le64 dar; 70 __le32 block_ts_lo; 71 __le32 block_ts_hi; 72 __le64 llp; 73 __le32 ctl_lo; 74 __le32 ctl_hi; 75 __le32 sstat; 76 __le32 dstat; 77 __le32 status_lo; 78 __le32 ststus_hi; 79 __le32 reserved_lo; 80 __le32 reserved_hi; 81 }; 82 83 struct axi_dma_desc { 84 struct axi_dma_lli lli; 85 86 struct virt_dma_desc vd; 87 struct axi_dma_chan *chan; 88 struct list_head xfer_list; 89 }; 90 91 static inline struct device *dchan2dev(struct dma_chan *dchan) 92 { 93 return &dchan->dev->device; 94 } 95 96 static inline struct device *chan2dev(struct axi_dma_chan *chan) 97 { 98 return &chan->vc.chan.dev->device; 99 } 100 101 static inline struct axi_dma_desc *vd_to_axi_desc(struct virt_dma_desc *vd) 102 { 103 return container_of(vd, struct axi_dma_desc, vd); 104 } 105 106 static inline struct axi_dma_chan *vc_to_axi_dma_chan(struct virt_dma_chan *vc) 107 { 108 return container_of(vc, struct axi_dma_chan, vc); 109 } 110 111 static inline struct axi_dma_chan *dchan_to_axi_dma_chan(struct dma_chan *dchan) 112 { 113 return vc_to_axi_dma_chan(to_virt_chan(dchan)); 114 } 115 116 117 #define COMMON_REG_LEN 0x100 118 #define CHAN_REG_LEN 0x100 119 120 /* Common registers offset */ 121 #define DMAC_ID 0x000 /* R DMAC ID */ 122 #define DMAC_COMPVER 0x008 /* R DMAC Component Version */ 123 #define DMAC_CFG 0x010 /* R/W DMAC Configuration */ 124 #define DMAC_CHEN 0x018 /* R/W DMAC Channel Enable */ 125 #define DMAC_CHEN_L 0x018 /* R/W DMAC Channel Enable 00-31 */ 126 #define DMAC_CHEN_H 0x01C /* R/W DMAC Channel Enable 32-63 */ 127 #define DMAC_INTSTATUS 0x030 /* R DMAC Interrupt Status */ 128 #define DMAC_COMMON_INTCLEAR 0x038 /* W DMAC Interrupt Clear */ 129 #define DMAC_COMMON_INTSTATUS_ENA 0x040 /* R DMAC Interrupt Status Enable */ 130 #define DMAC_COMMON_INTSIGNAL_ENA 0x048 /* R/W DMAC Interrupt Signal Enable */ 131 #define DMAC_COMMON_INTSTATUS 0x050 /* R DMAC Interrupt Status */ 132 #define DMAC_RESET 0x058 /* R DMAC Reset Register1 */ 133 134 /* DMA channel registers offset */ 135 #define CH_SAR 0x000 /* R/W Chan Source Address */ 136 #define CH_DAR 0x008 /* R/W Chan Destination Address */ 137 #define CH_BLOCK_TS 0x010 /* R/W Chan Block Transfer Size */ 138 #define CH_CTL 0x018 /* R/W Chan Control */ 139 #define CH_CTL_L 0x018 /* R/W Chan Control 00-31 */ 140 #define CH_CTL_H 0x01C /* R/W Chan Control 32-63 */ 141 #define CH_CFG 0x020 /* R/W Chan Configuration */ 142 #define CH_CFG_L 0x020 /* R/W Chan Configuration 00-31 */ 143 #define CH_CFG_H 0x024 /* R/W Chan Configuration 32-63 */ 144 #define CH_LLP 0x028 /* R/W Chan Linked List Pointer */ 145 #define CH_STATUS 0x030 /* R Chan Status */ 146 #define CH_SWHSSRC 0x038 /* R/W Chan SW Handshake Source */ 147 #define CH_SWHSDST 0x040 /* R/W Chan SW Handshake Destination */ 148 #define CH_BLK_TFR_RESUMEREQ 0x048 /* W Chan Block Transfer Resume Req */ 149 #define CH_AXI_ID 0x050 /* R/W Chan AXI ID */ 150 #define CH_AXI_QOS 0x058 /* R/W Chan AXI QOS */ 151 #define CH_SSTAT 0x060 /* R Chan Source Status */ 152 #define CH_DSTAT 0x068 /* R Chan Destination Status */ 153 #define CH_SSTATAR 0x070 /* R/W Chan Source Status Fetch Addr */ 154 #define CH_DSTATAR 0x078 /* R/W Chan Destination Status Fetch Addr */ 155 #define CH_INTSTATUS_ENA 0x080 /* R/W Chan Interrupt Status Enable */ 156 #define CH_INTSTATUS 0x088 /* R/W Chan Interrupt Status */ 157 #define CH_INTSIGNAL_ENA 0x090 /* R/W Chan Interrupt Signal Enable */ 158 #define CH_INTCLEAR 0x098 /* W Chan Interrupt Clear */ 159 160 161 /* DMAC_CFG */ 162 #define DMAC_EN_POS 0 163 #define DMAC_EN_MASK BIT(DMAC_EN_POS) 164 165 #define INT_EN_POS 1 166 #define INT_EN_MASK BIT(INT_EN_POS) 167 168 #define DMAC_CHAN_EN_SHIFT 0 169 #define DMAC_CHAN_EN_WE_SHIFT 8 170 171 #define DMAC_CHAN_SUSP_SHIFT 16 172 #define DMAC_CHAN_SUSP_WE_SHIFT 24 173 174 /* CH_CTL_H */ 175 #define CH_CTL_H_ARLEN_EN BIT(6) 176 #define CH_CTL_H_ARLEN_POS 7 177 #define CH_CTL_H_AWLEN_EN BIT(15) 178 #define CH_CTL_H_AWLEN_POS 16 179 180 enum { 181 DWAXIDMAC_ARWLEN_1 = 0, 182 DWAXIDMAC_ARWLEN_2 = 1, 183 DWAXIDMAC_ARWLEN_4 = 3, 184 DWAXIDMAC_ARWLEN_8 = 7, 185 DWAXIDMAC_ARWLEN_16 = 15, 186 DWAXIDMAC_ARWLEN_32 = 31, 187 DWAXIDMAC_ARWLEN_64 = 63, 188 DWAXIDMAC_ARWLEN_128 = 127, 189 DWAXIDMAC_ARWLEN_256 = 255, 190 DWAXIDMAC_ARWLEN_MIN = DWAXIDMAC_ARWLEN_1, 191 DWAXIDMAC_ARWLEN_MAX = DWAXIDMAC_ARWLEN_256 192 }; 193 194 #define CH_CTL_H_LLI_LAST BIT(30) 195 #define CH_CTL_H_LLI_VALID BIT(31) 196 197 /* CH_CTL_L */ 198 #define CH_CTL_L_LAST_WRITE_EN BIT(30) 199 200 #define CH_CTL_L_DST_MSIZE_POS 18 201 #define CH_CTL_L_SRC_MSIZE_POS 14 202 203 enum { 204 DWAXIDMAC_BURST_TRANS_LEN_1 = 0, 205 DWAXIDMAC_BURST_TRANS_LEN_4, 206 DWAXIDMAC_BURST_TRANS_LEN_8, 207 DWAXIDMAC_BURST_TRANS_LEN_16, 208 DWAXIDMAC_BURST_TRANS_LEN_32, 209 DWAXIDMAC_BURST_TRANS_LEN_64, 210 DWAXIDMAC_BURST_TRANS_LEN_128, 211 DWAXIDMAC_BURST_TRANS_LEN_256, 212 DWAXIDMAC_BURST_TRANS_LEN_512, 213 DWAXIDMAC_BURST_TRANS_LEN_1024 214 }; 215 216 #define CH_CTL_L_DST_WIDTH_POS 11 217 #define CH_CTL_L_SRC_WIDTH_POS 8 218 219 #define CH_CTL_L_DST_INC_POS 6 220 #define CH_CTL_L_SRC_INC_POS 4 221 enum { 222 DWAXIDMAC_CH_CTL_L_INC = 0, 223 DWAXIDMAC_CH_CTL_L_NOINC 224 }; 225 226 #define CH_CTL_L_DST_MAST BIT(2) 227 #define CH_CTL_L_SRC_MAST BIT(0) 228 229 /* CH_CFG_H */ 230 #define CH_CFG_H_PRIORITY_POS 17 231 #define CH_CFG_H_HS_SEL_DST_POS 4 232 #define CH_CFG_H_HS_SEL_SRC_POS 3 233 enum { 234 DWAXIDMAC_HS_SEL_HW = 0, 235 DWAXIDMAC_HS_SEL_SW 236 }; 237 238 #define CH_CFG_H_TT_FC_POS 0 239 enum { 240 DWAXIDMAC_TT_FC_MEM_TO_MEM_DMAC = 0, 241 DWAXIDMAC_TT_FC_MEM_TO_PER_DMAC, 242 DWAXIDMAC_TT_FC_PER_TO_MEM_DMAC, 243 DWAXIDMAC_TT_FC_PER_TO_PER_DMAC, 244 DWAXIDMAC_TT_FC_PER_TO_MEM_SRC, 245 DWAXIDMAC_TT_FC_PER_TO_PER_SRC, 246 DWAXIDMAC_TT_FC_MEM_TO_PER_DST, 247 DWAXIDMAC_TT_FC_PER_TO_PER_DST 248 }; 249 250 /* CH_CFG_L */ 251 #define CH_CFG_L_DST_MULTBLK_TYPE_POS 2 252 #define CH_CFG_L_SRC_MULTBLK_TYPE_POS 0 253 enum { 254 DWAXIDMAC_MBLK_TYPE_CONTIGUOUS = 0, 255 DWAXIDMAC_MBLK_TYPE_RELOAD, 256 DWAXIDMAC_MBLK_TYPE_SHADOW_REG, 257 DWAXIDMAC_MBLK_TYPE_LL 258 }; 259 260 /** 261 * DW AXI DMA channel interrupts 262 * 263 * @DWAXIDMAC_IRQ_NONE: Bitmask of no one interrupt 264 * @DWAXIDMAC_IRQ_BLOCK_TRF: Block transfer complete 265 * @DWAXIDMAC_IRQ_DMA_TRF: Dma transfer complete 266 * @DWAXIDMAC_IRQ_SRC_TRAN: Source transaction complete 267 * @DWAXIDMAC_IRQ_DST_TRAN: Destination transaction complete 268 * @DWAXIDMAC_IRQ_SRC_DEC_ERR: Source decode error 269 * @DWAXIDMAC_IRQ_DST_DEC_ERR: Destination decode error 270 * @DWAXIDMAC_IRQ_SRC_SLV_ERR: Source slave error 271 * @DWAXIDMAC_IRQ_DST_SLV_ERR: Destination slave error 272 * @DWAXIDMAC_IRQ_LLI_RD_DEC_ERR: LLI read decode error 273 * @DWAXIDMAC_IRQ_LLI_WR_DEC_ERR: LLI write decode error 274 * @DWAXIDMAC_IRQ_LLI_RD_SLV_ERR: LLI read slave error 275 * @DWAXIDMAC_IRQ_LLI_WR_SLV_ERR: LLI write slave error 276 * @DWAXIDMAC_IRQ_INVALID_ERR: LLI invalid error or Shadow register error 277 * @DWAXIDMAC_IRQ_MULTIBLKTYPE_ERR: Slave Interface Multiblock type error 278 * @DWAXIDMAC_IRQ_DEC_ERR: Slave Interface decode error 279 * @DWAXIDMAC_IRQ_WR2RO_ERR: Slave Interface write to read only error 280 * @DWAXIDMAC_IRQ_RD2RWO_ERR: Slave Interface read to write only error 281 * @DWAXIDMAC_IRQ_WRONCHEN_ERR: Slave Interface write to channel error 282 * @DWAXIDMAC_IRQ_SHADOWREG_ERR: Slave Interface shadow reg error 283 * @DWAXIDMAC_IRQ_WRONHOLD_ERR: Slave Interface hold error 284 * @DWAXIDMAC_IRQ_LOCK_CLEARED: Lock Cleared Status 285 * @DWAXIDMAC_IRQ_SRC_SUSPENDED: Source Suspended Status 286 * @DWAXIDMAC_IRQ_SUSPENDED: Channel Suspended Status 287 * @DWAXIDMAC_IRQ_DISABLED: Channel Disabled Status 288 * @DWAXIDMAC_IRQ_ABORTED: Channel Aborted Status 289 * @DWAXIDMAC_IRQ_ALL_ERR: Bitmask of all error interrupts 290 * @DWAXIDMAC_IRQ_ALL: Bitmask of all interrupts 291 */ 292 enum { 293 DWAXIDMAC_IRQ_NONE = 0, 294 DWAXIDMAC_IRQ_BLOCK_TRF = BIT(0), 295 DWAXIDMAC_IRQ_DMA_TRF = BIT(1), 296 DWAXIDMAC_IRQ_SRC_TRAN = BIT(3), 297 DWAXIDMAC_IRQ_DST_TRAN = BIT(4), 298 DWAXIDMAC_IRQ_SRC_DEC_ERR = BIT(5), 299 DWAXIDMAC_IRQ_DST_DEC_ERR = BIT(6), 300 DWAXIDMAC_IRQ_SRC_SLV_ERR = BIT(7), 301 DWAXIDMAC_IRQ_DST_SLV_ERR = BIT(8), 302 DWAXIDMAC_IRQ_LLI_RD_DEC_ERR = BIT(9), 303 DWAXIDMAC_IRQ_LLI_WR_DEC_ERR = BIT(10), 304 DWAXIDMAC_IRQ_LLI_RD_SLV_ERR = BIT(11), 305 DWAXIDMAC_IRQ_LLI_WR_SLV_ERR = BIT(12), 306 DWAXIDMAC_IRQ_INVALID_ERR = BIT(13), 307 DWAXIDMAC_IRQ_MULTIBLKTYPE_ERR = BIT(14), 308 DWAXIDMAC_IRQ_DEC_ERR = BIT(16), 309 DWAXIDMAC_IRQ_WR2RO_ERR = BIT(17), 310 DWAXIDMAC_IRQ_RD2RWO_ERR = BIT(18), 311 DWAXIDMAC_IRQ_WRONCHEN_ERR = BIT(19), 312 DWAXIDMAC_IRQ_SHADOWREG_ERR = BIT(20), 313 DWAXIDMAC_IRQ_WRONHOLD_ERR = BIT(21), 314 DWAXIDMAC_IRQ_LOCK_CLEARED = BIT(27), 315 DWAXIDMAC_IRQ_SRC_SUSPENDED = BIT(28), 316 DWAXIDMAC_IRQ_SUSPENDED = BIT(29), 317 DWAXIDMAC_IRQ_DISABLED = BIT(30), 318 DWAXIDMAC_IRQ_ABORTED = BIT(31), 319 DWAXIDMAC_IRQ_ALL_ERR = (GENMASK(21, 16) | GENMASK(14, 5)), 320 DWAXIDMAC_IRQ_ALL = GENMASK(31, 0) 321 }; 322 323 enum { 324 DWAXIDMAC_TRANS_WIDTH_8 = 0, 325 DWAXIDMAC_TRANS_WIDTH_16, 326 DWAXIDMAC_TRANS_WIDTH_32, 327 DWAXIDMAC_TRANS_WIDTH_64, 328 DWAXIDMAC_TRANS_WIDTH_128, 329 DWAXIDMAC_TRANS_WIDTH_256, 330 DWAXIDMAC_TRANS_WIDTH_512, 331 DWAXIDMAC_TRANS_WIDTH_MAX = DWAXIDMAC_TRANS_WIDTH_512 332 }; 333 334 #endif /* _AXI_DMA_PLATFORM_H */ 335