1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014-2015, 2022 MediaTek Inc. 4 * Author: Chaotian.Jing <chaotian.jing@mediatek.com> 5 */ 6 7 #include <linux/module.h> 8 #include <linux/bitops.h> 9 #include <linux/clk.h> 10 #include <linux/delay.h> 11 #include <linux/dma-mapping.h> 12 #include <linux/iopoll.h> 13 #include <linux/ioport.h> 14 #include <linux/irq.h> 15 #include <linux/of_address.h> 16 #include <linux/of_device.h> 17 #include <linux/of_irq.h> 18 #include <linux/of_gpio.h> 19 #include <linux/pinctrl/consumer.h> 20 #include <linux/platform_device.h> 21 #include <linux/pm.h> 22 #include <linux/pm_runtime.h> 23 #include <linux/pm_wakeirq.h> 24 #include <linux/regulator/consumer.h> 25 #include <linux/slab.h> 26 #include <linux/spinlock.h> 27 #include <linux/interrupt.h> 28 #include <linux/reset.h> 29 30 #include <linux/mmc/card.h> 31 #include <linux/mmc/core.h> 32 #include <linux/mmc/host.h> 33 #include <linux/mmc/mmc.h> 34 #include <linux/mmc/sd.h> 35 #include <linux/mmc/sdio.h> 36 #include <linux/mmc/slot-gpio.h> 37 38 #include "cqhci.h" 39 40 #define MAX_BD_NUM 1024 41 #define MSDC_NR_CLOCKS 3 42 43 /*--------------------------------------------------------------------------*/ 44 /* Common Definition */ 45 /*--------------------------------------------------------------------------*/ 46 #define MSDC_BUS_1BITS 0x0 47 #define MSDC_BUS_4BITS 0x1 48 #define MSDC_BUS_8BITS 0x2 49 50 #define MSDC_BURST_64B 0x6 51 52 /*--------------------------------------------------------------------------*/ 53 /* Register Offset */ 54 /*--------------------------------------------------------------------------*/ 55 #define MSDC_CFG 0x0 56 #define MSDC_IOCON 0x04 57 #define MSDC_PS 0x08 58 #define MSDC_INT 0x0c 59 #define MSDC_INTEN 0x10 60 #define MSDC_FIFOCS 0x14 61 #define SDC_CFG 0x30 62 #define SDC_CMD 0x34 63 #define SDC_ARG 0x38 64 #define SDC_STS 0x3c 65 #define SDC_RESP0 0x40 66 #define SDC_RESP1 0x44 67 #define SDC_RESP2 0x48 68 #define SDC_RESP3 0x4c 69 #define SDC_BLK_NUM 0x50 70 #define SDC_ADV_CFG0 0x64 71 #define EMMC_IOCON 0x7c 72 #define SDC_ACMD_RESP 0x80 73 #define DMA_SA_H4BIT 0x8c 74 #define MSDC_DMA_SA 0x90 75 #define MSDC_DMA_CTRL 0x98 76 #define MSDC_DMA_CFG 0x9c 77 #define MSDC_PATCH_BIT 0xb0 78 #define MSDC_PATCH_BIT1 0xb4 79 #define MSDC_PATCH_BIT2 0xb8 80 #define MSDC_PAD_TUNE 0xec 81 #define MSDC_PAD_TUNE0 0xf0 82 #define PAD_DS_TUNE 0x188 83 #define PAD_CMD_TUNE 0x18c 84 #define EMMC51_CFG0 0x204 85 #define EMMC50_CFG0 0x208 86 #define EMMC50_CFG1 0x20c 87 #define EMMC50_CFG3 0x220 88 #define SDC_FIFO_CFG 0x228 89 #define CQHCI_SETTING 0x7fc 90 91 /*--------------------------------------------------------------------------*/ 92 /* Top Pad Register Offset */ 93 /*--------------------------------------------------------------------------*/ 94 #define EMMC_TOP_CONTROL 0x00 95 #define EMMC_TOP_CMD 0x04 96 #define EMMC50_PAD_DS_TUNE 0x0c 97 98 /*--------------------------------------------------------------------------*/ 99 /* Register Mask */ 100 /*--------------------------------------------------------------------------*/ 101 102 /* MSDC_CFG mask */ 103 #define MSDC_CFG_MODE BIT(0) /* RW */ 104 #define MSDC_CFG_CKPDN BIT(1) /* RW */ 105 #define MSDC_CFG_RST BIT(2) /* RW */ 106 #define MSDC_CFG_PIO BIT(3) /* RW */ 107 #define MSDC_CFG_CKDRVEN BIT(4) /* RW */ 108 #define MSDC_CFG_BV18SDT BIT(5) /* RW */ 109 #define MSDC_CFG_BV18PSS BIT(6) /* R */ 110 #define MSDC_CFG_CKSTB BIT(7) /* R */ 111 #define MSDC_CFG_CKDIV GENMASK(15, 8) /* RW */ 112 #define MSDC_CFG_CKMOD GENMASK(17, 16) /* RW */ 113 #define MSDC_CFG_HS400_CK_MODE BIT(18) /* RW */ 114 #define MSDC_CFG_HS400_CK_MODE_EXTRA BIT(22) /* RW */ 115 #define MSDC_CFG_CKDIV_EXTRA GENMASK(19, 8) /* RW */ 116 #define MSDC_CFG_CKMOD_EXTRA GENMASK(21, 20) /* RW */ 117 118 /* MSDC_IOCON mask */ 119 #define MSDC_IOCON_SDR104CKS BIT(0) /* RW */ 120 #define MSDC_IOCON_RSPL BIT(1) /* RW */ 121 #define MSDC_IOCON_DSPL BIT(2) /* RW */ 122 #define MSDC_IOCON_DDLSEL BIT(3) /* RW */ 123 #define MSDC_IOCON_DDR50CKD BIT(4) /* RW */ 124 #define MSDC_IOCON_DSPLSEL BIT(5) /* RW */ 125 #define MSDC_IOCON_W_DSPL BIT(8) /* RW */ 126 #define MSDC_IOCON_D0SPL BIT(16) /* RW */ 127 #define MSDC_IOCON_D1SPL BIT(17) /* RW */ 128 #define MSDC_IOCON_D2SPL BIT(18) /* RW */ 129 #define MSDC_IOCON_D3SPL BIT(19) /* RW */ 130 #define MSDC_IOCON_D4SPL BIT(20) /* RW */ 131 #define MSDC_IOCON_D5SPL BIT(21) /* RW */ 132 #define MSDC_IOCON_D6SPL BIT(22) /* RW */ 133 #define MSDC_IOCON_D7SPL BIT(23) /* RW */ 134 #define MSDC_IOCON_RISCSZ GENMASK(25, 24) /* RW */ 135 136 /* MSDC_PS mask */ 137 #define MSDC_PS_CDEN BIT(0) /* RW */ 138 #define MSDC_PS_CDSTS BIT(1) /* R */ 139 #define MSDC_PS_CDDEBOUNCE GENMASK(15, 12) /* RW */ 140 #define MSDC_PS_DAT GENMASK(23, 16) /* R */ 141 #define MSDC_PS_DATA1 BIT(17) /* R */ 142 #define MSDC_PS_CMD BIT(24) /* R */ 143 #define MSDC_PS_WP BIT(31) /* R */ 144 145 /* MSDC_INT mask */ 146 #define MSDC_INT_MMCIRQ BIT(0) /* W1C */ 147 #define MSDC_INT_CDSC BIT(1) /* W1C */ 148 #define MSDC_INT_ACMDRDY BIT(3) /* W1C */ 149 #define MSDC_INT_ACMDTMO BIT(4) /* W1C */ 150 #define MSDC_INT_ACMDCRCERR BIT(5) /* W1C */ 151 #define MSDC_INT_DMAQ_EMPTY BIT(6) /* W1C */ 152 #define MSDC_INT_SDIOIRQ BIT(7) /* W1C */ 153 #define MSDC_INT_CMDRDY BIT(8) /* W1C */ 154 #define MSDC_INT_CMDTMO BIT(9) /* W1C */ 155 #define MSDC_INT_RSPCRCERR BIT(10) /* W1C */ 156 #define MSDC_INT_CSTA BIT(11) /* R */ 157 #define MSDC_INT_XFER_COMPL BIT(12) /* W1C */ 158 #define MSDC_INT_DXFER_DONE BIT(13) /* W1C */ 159 #define MSDC_INT_DATTMO BIT(14) /* W1C */ 160 #define MSDC_INT_DATCRCERR BIT(15) /* W1C */ 161 #define MSDC_INT_ACMD19_DONE BIT(16) /* W1C */ 162 #define MSDC_INT_DMA_BDCSERR BIT(17) /* W1C */ 163 #define MSDC_INT_DMA_GPDCSERR BIT(18) /* W1C */ 164 #define MSDC_INT_DMA_PROTECT BIT(19) /* W1C */ 165 #define MSDC_INT_CMDQ BIT(28) /* W1C */ 166 167 /* MSDC_INTEN mask */ 168 #define MSDC_INTEN_MMCIRQ BIT(0) /* RW */ 169 #define MSDC_INTEN_CDSC BIT(1) /* RW */ 170 #define MSDC_INTEN_ACMDRDY BIT(3) /* RW */ 171 #define MSDC_INTEN_ACMDTMO BIT(4) /* RW */ 172 #define MSDC_INTEN_ACMDCRCERR BIT(5) /* RW */ 173 #define MSDC_INTEN_DMAQ_EMPTY BIT(6) /* RW */ 174 #define MSDC_INTEN_SDIOIRQ BIT(7) /* RW */ 175 #define MSDC_INTEN_CMDRDY BIT(8) /* RW */ 176 #define MSDC_INTEN_CMDTMO BIT(9) /* RW */ 177 #define MSDC_INTEN_RSPCRCERR BIT(10) /* RW */ 178 #define MSDC_INTEN_CSTA BIT(11) /* RW */ 179 #define MSDC_INTEN_XFER_COMPL BIT(12) /* RW */ 180 #define MSDC_INTEN_DXFER_DONE BIT(13) /* RW */ 181 #define MSDC_INTEN_DATTMO BIT(14) /* RW */ 182 #define MSDC_INTEN_DATCRCERR BIT(15) /* RW */ 183 #define MSDC_INTEN_ACMD19_DONE BIT(16) /* RW */ 184 #define MSDC_INTEN_DMA_BDCSERR BIT(17) /* RW */ 185 #define MSDC_INTEN_DMA_GPDCSERR BIT(18) /* RW */ 186 #define MSDC_INTEN_DMA_PROTECT BIT(19) /* RW */ 187 188 /* MSDC_FIFOCS mask */ 189 #define MSDC_FIFOCS_RXCNT GENMASK(7, 0) /* R */ 190 #define MSDC_FIFOCS_TXCNT GENMASK(23, 16) /* R */ 191 #define MSDC_FIFOCS_CLR BIT(31) /* RW */ 192 193 /* SDC_CFG mask */ 194 #define SDC_CFG_SDIOINTWKUP BIT(0) /* RW */ 195 #define SDC_CFG_INSWKUP BIT(1) /* RW */ 196 #define SDC_CFG_WRDTOC GENMASK(14, 2) /* RW */ 197 #define SDC_CFG_BUSWIDTH GENMASK(17, 16) /* RW */ 198 #define SDC_CFG_SDIO BIT(19) /* RW */ 199 #define SDC_CFG_SDIOIDE BIT(20) /* RW */ 200 #define SDC_CFG_INTATGAP BIT(21) /* RW */ 201 #define SDC_CFG_DTOC GENMASK(31, 24) /* RW */ 202 203 /* SDC_STS mask */ 204 #define SDC_STS_SDCBUSY BIT(0) /* RW */ 205 #define SDC_STS_CMDBUSY BIT(1) /* RW */ 206 #define SDC_STS_SWR_COMPL BIT(31) /* RW */ 207 208 #define SDC_DAT1_IRQ_TRIGGER BIT(19) /* RW */ 209 /* SDC_ADV_CFG0 mask */ 210 #define SDC_RX_ENHANCE_EN BIT(20) /* RW */ 211 212 /* DMA_SA_H4BIT mask */ 213 #define DMA_ADDR_HIGH_4BIT GENMASK(3, 0) /* RW */ 214 215 /* MSDC_DMA_CTRL mask */ 216 #define MSDC_DMA_CTRL_START BIT(0) /* W */ 217 #define MSDC_DMA_CTRL_STOP BIT(1) /* W */ 218 #define MSDC_DMA_CTRL_RESUME BIT(2) /* W */ 219 #define MSDC_DMA_CTRL_MODE BIT(8) /* RW */ 220 #define MSDC_DMA_CTRL_LASTBUF BIT(10) /* RW */ 221 #define MSDC_DMA_CTRL_BRUSTSZ GENMASK(14, 12) /* RW */ 222 223 /* MSDC_DMA_CFG mask */ 224 #define MSDC_DMA_CFG_STS BIT(0) /* R */ 225 #define MSDC_DMA_CFG_DECSEN BIT(1) /* RW */ 226 #define MSDC_DMA_CFG_AHBHPROT2 BIT(9) /* RW */ 227 #define MSDC_DMA_CFG_ACTIVEEN BIT(13) /* RW */ 228 #define MSDC_DMA_CFG_CS12B16B BIT(16) /* RW */ 229 230 /* MSDC_PATCH_BIT mask */ 231 #define MSDC_PATCH_BIT_ODDSUPP BIT(1) /* RW */ 232 #define MSDC_INT_DAT_LATCH_CK_SEL GENMASK(9, 7) 233 #define MSDC_CKGEN_MSDC_DLY_SEL GENMASK(14, 10) 234 #define MSDC_PATCH_BIT_IODSSEL BIT(16) /* RW */ 235 #define MSDC_PATCH_BIT_IOINTSEL BIT(17) /* RW */ 236 #define MSDC_PATCH_BIT_BUSYDLY GENMASK(21, 18) /* RW */ 237 #define MSDC_PATCH_BIT_WDOD GENMASK(25, 22) /* RW */ 238 #define MSDC_PATCH_BIT_IDRTSEL BIT(26) /* RW */ 239 #define MSDC_PATCH_BIT_CMDFSEL BIT(27) /* RW */ 240 #define MSDC_PATCH_BIT_INTDLSEL BIT(28) /* RW */ 241 #define MSDC_PATCH_BIT_SPCPUSH BIT(29) /* RW */ 242 #define MSDC_PATCH_BIT_DECRCTMO BIT(30) /* RW */ 243 244 #define MSDC_PATCH_BIT1_CMDTA GENMASK(5, 3) /* RW */ 245 #define MSDC_PB1_BUSY_CHECK_SEL BIT(7) /* RW */ 246 #define MSDC_PATCH_BIT1_STOP_DLY GENMASK(11, 8) /* RW */ 247 248 #define MSDC_PATCH_BIT2_CFGRESP BIT(15) /* RW */ 249 #define MSDC_PATCH_BIT2_CFGCRCSTS BIT(28) /* RW */ 250 #define MSDC_PB2_SUPPORT_64G BIT(1) /* RW */ 251 #define MSDC_PB2_RESPWAIT GENMASK(3, 2) /* RW */ 252 #define MSDC_PB2_RESPSTSENSEL GENMASK(18, 16) /* RW */ 253 #define MSDC_PB2_CRCSTSENSEL GENMASK(31, 29) /* RW */ 254 255 #define MSDC_PAD_TUNE_DATWRDLY GENMASK(4, 0) /* RW */ 256 #define MSDC_PAD_TUNE_DATRRDLY GENMASK(12, 8) /* RW */ 257 #define MSDC_PAD_TUNE_CMDRDLY GENMASK(20, 16) /* RW */ 258 #define MSDC_PAD_TUNE_CMDRRDLY GENMASK(26, 22) /* RW */ 259 #define MSDC_PAD_TUNE_CLKTDLY GENMASK(31, 27) /* RW */ 260 #define MSDC_PAD_TUNE_RXDLYSEL BIT(15) /* RW */ 261 #define MSDC_PAD_TUNE_RD_SEL BIT(13) /* RW */ 262 #define MSDC_PAD_TUNE_CMD_SEL BIT(21) /* RW */ 263 264 #define PAD_DS_TUNE_DLY_SEL BIT(0) /* RW */ 265 #define PAD_DS_TUNE_DLY1 GENMASK(6, 2) /* RW */ 266 #define PAD_DS_TUNE_DLY2 GENMASK(11, 7) /* RW */ 267 #define PAD_DS_TUNE_DLY3 GENMASK(16, 12) /* RW */ 268 269 #define PAD_CMD_TUNE_RX_DLY3 GENMASK(5, 1) /* RW */ 270 271 /* EMMC51_CFG0 mask */ 272 #define CMDQ_RDAT_CNT GENMASK(21, 12) /* RW */ 273 274 #define EMMC50_CFG_PADCMD_LATCHCK BIT(0) /* RW */ 275 #define EMMC50_CFG_CRCSTS_EDGE BIT(3) /* RW */ 276 #define EMMC50_CFG_CFCSTS_SEL BIT(4) /* RW */ 277 #define EMMC50_CFG_CMD_RESP_SEL BIT(9) /* RW */ 278 279 /* EMMC50_CFG1 mask */ 280 #define EMMC50_CFG1_DS_CFG BIT(28) /* RW */ 281 282 #define EMMC50_CFG3_OUTS_WR GENMASK(4, 0) /* RW */ 283 284 #define SDC_FIFO_CFG_WRVALIDSEL BIT(24) /* RW */ 285 #define SDC_FIFO_CFG_RDVALIDSEL BIT(25) /* RW */ 286 287 /* CQHCI_SETTING */ 288 #define CQHCI_RD_CMD_WND_SEL BIT(14) /* RW */ 289 #define CQHCI_WR_CMD_WND_SEL BIT(15) /* RW */ 290 291 /* EMMC_TOP_CONTROL mask */ 292 #define PAD_RXDLY_SEL BIT(0) /* RW */ 293 #define DELAY_EN BIT(1) /* RW */ 294 #define PAD_DAT_RD_RXDLY2 GENMASK(6, 2) /* RW */ 295 #define PAD_DAT_RD_RXDLY GENMASK(11, 7) /* RW */ 296 #define PAD_DAT_RD_RXDLY2_SEL BIT(12) /* RW */ 297 #define PAD_DAT_RD_RXDLY_SEL BIT(13) /* RW */ 298 #define DATA_K_VALUE_SEL BIT(14) /* RW */ 299 #define SDC_RX_ENH_EN BIT(15) /* TW */ 300 301 /* EMMC_TOP_CMD mask */ 302 #define PAD_CMD_RXDLY2 GENMASK(4, 0) /* RW */ 303 #define PAD_CMD_RXDLY GENMASK(9, 5) /* RW */ 304 #define PAD_CMD_RD_RXDLY2_SEL BIT(10) /* RW */ 305 #define PAD_CMD_RD_RXDLY_SEL BIT(11) /* RW */ 306 #define PAD_CMD_TX_DLY GENMASK(16, 12) /* RW */ 307 308 /* EMMC50_PAD_DS_TUNE mask */ 309 #define PAD_DS_DLY_SEL BIT(16) /* RW */ 310 #define PAD_DS_DLY1 GENMASK(14, 10) /* RW */ 311 #define PAD_DS_DLY3 GENMASK(4, 0) /* RW */ 312 313 #define REQ_CMD_EIO BIT(0) 314 #define REQ_CMD_TMO BIT(1) 315 #define REQ_DAT_ERR BIT(2) 316 #define REQ_STOP_EIO BIT(3) 317 #define REQ_STOP_TMO BIT(4) 318 #define REQ_CMD_BUSY BIT(5) 319 320 #define MSDC_PREPARE_FLAG BIT(0) 321 #define MSDC_ASYNC_FLAG BIT(1) 322 #define MSDC_MMAP_FLAG BIT(2) 323 324 #define MTK_MMC_AUTOSUSPEND_DELAY 50 325 #define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */ 326 #define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */ 327 328 #define DEFAULT_DEBOUNCE (8) /* 8 cycles CD debounce */ 329 330 #define PAD_DELAY_MAX 32 /* PAD delay cells */ 331 /*--------------------------------------------------------------------------*/ 332 /* Descriptor Structure */ 333 /*--------------------------------------------------------------------------*/ 334 struct mt_gpdma_desc { 335 u32 gpd_info; 336 #define GPDMA_DESC_HWO BIT(0) 337 #define GPDMA_DESC_BDP BIT(1) 338 #define GPDMA_DESC_CHECKSUM GENMASK(15, 8) 339 #define GPDMA_DESC_INT BIT(16) 340 #define GPDMA_DESC_NEXT_H4 GENMASK(27, 24) 341 #define GPDMA_DESC_PTR_H4 GENMASK(31, 28) 342 u32 next; 343 u32 ptr; 344 u32 gpd_data_len; 345 #define GPDMA_DESC_BUFLEN GENMASK(15, 0) 346 #define GPDMA_DESC_EXTLEN GENMASK(23, 16) 347 u32 arg; 348 u32 blknum; 349 u32 cmd; 350 }; 351 352 struct mt_bdma_desc { 353 u32 bd_info; 354 #define BDMA_DESC_EOL BIT(0) 355 #define BDMA_DESC_CHECKSUM GENMASK(15, 8) 356 #define BDMA_DESC_BLKPAD BIT(17) 357 #define BDMA_DESC_DWPAD BIT(18) 358 #define BDMA_DESC_NEXT_H4 GENMASK(27, 24) 359 #define BDMA_DESC_PTR_H4 GENMASK(31, 28) 360 u32 next; 361 u32 ptr; 362 u32 bd_data_len; 363 #define BDMA_DESC_BUFLEN GENMASK(15, 0) 364 #define BDMA_DESC_BUFLEN_EXT GENMASK(23, 0) 365 }; 366 367 struct msdc_dma { 368 struct scatterlist *sg; /* I/O scatter list */ 369 struct mt_gpdma_desc *gpd; /* pointer to gpd array */ 370 struct mt_bdma_desc *bd; /* pointer to bd array */ 371 dma_addr_t gpd_addr; /* the physical address of gpd array */ 372 dma_addr_t bd_addr; /* the physical address of bd array */ 373 }; 374 375 struct msdc_save_para { 376 u32 msdc_cfg; 377 u32 iocon; 378 u32 sdc_cfg; 379 u32 pad_tune; 380 u32 patch_bit0; 381 u32 patch_bit1; 382 u32 patch_bit2; 383 u32 pad_ds_tune; 384 u32 pad_cmd_tune; 385 u32 emmc50_cfg0; 386 u32 emmc50_cfg3; 387 u32 sdc_fifo_cfg; 388 u32 emmc_top_control; 389 u32 emmc_top_cmd; 390 u32 emmc50_pad_ds_tune; 391 }; 392 393 struct mtk_mmc_compatible { 394 u8 clk_div_bits; 395 bool recheck_sdio_irq; 396 bool hs400_tune; /* only used for MT8173 */ 397 u32 pad_tune_reg; 398 bool async_fifo; 399 bool data_tune; 400 bool busy_check; 401 bool stop_clk_fix; 402 bool enhance_rx; 403 bool support_64g; 404 bool use_internal_cd; 405 }; 406 407 struct msdc_tune_para { 408 u32 iocon; 409 u32 pad_tune; 410 u32 pad_cmd_tune; 411 u32 emmc_top_control; 412 u32 emmc_top_cmd; 413 }; 414 415 struct msdc_delay_phase { 416 u8 maxlen; 417 u8 start; 418 u8 final_phase; 419 }; 420 421 struct msdc_host { 422 struct device *dev; 423 const struct mtk_mmc_compatible *dev_comp; 424 int cmd_rsp; 425 426 spinlock_t lock; 427 struct mmc_request *mrq; 428 struct mmc_command *cmd; 429 struct mmc_data *data; 430 int error; 431 432 void __iomem *base; /* host base address */ 433 void __iomem *top_base; /* host top register base address */ 434 435 struct msdc_dma dma; /* dma channel */ 436 u64 dma_mask; 437 438 u32 timeout_ns; /* data timeout ns */ 439 u32 timeout_clks; /* data timeout clks */ 440 441 struct pinctrl *pinctrl; 442 struct pinctrl_state *pins_default; 443 struct pinctrl_state *pins_uhs; 444 struct pinctrl_state *pins_eint; 445 struct delayed_work req_timeout; 446 int irq; /* host interrupt */ 447 int eint_irq; /* interrupt from sdio device for waking up system */ 448 struct reset_control *reset; 449 450 struct clk *src_clk; /* msdc source clock */ 451 struct clk *h_clk; /* msdc h_clk */ 452 struct clk *bus_clk; /* bus clock which used to access register */ 453 struct clk *src_clk_cg; /* msdc source clock control gate */ 454 struct clk *sys_clk_cg; /* msdc subsys clock control gate */ 455 struct clk_bulk_data bulk_clks[MSDC_NR_CLOCKS]; 456 u32 mclk; /* mmc subsystem clock frequency */ 457 u32 src_clk_freq; /* source clock frequency */ 458 unsigned char timing; 459 bool vqmmc_enabled; 460 u32 latch_ck; 461 u32 hs400_ds_delay; 462 u32 hs400_ds_dly3; 463 u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */ 464 u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */ 465 bool hs400_cmd_resp_sel_rising; 466 /* cmd response sample selection for HS400 */ 467 bool hs400_mode; /* current eMMC will run at hs400 mode */ 468 bool hs400_tuning; /* hs400 mode online tuning */ 469 bool internal_cd; /* Use internal card-detect logic */ 470 bool cqhci; /* support eMMC hw cmdq */ 471 struct msdc_save_para save_para; /* used when gate HCLK */ 472 struct msdc_tune_para def_tune_para; /* default tune setting */ 473 struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */ 474 struct cqhci_host *cq_host; 475 }; 476 477 static const struct mtk_mmc_compatible mt8135_compat = { 478 .clk_div_bits = 8, 479 .recheck_sdio_irq = true, 480 .hs400_tune = false, 481 .pad_tune_reg = MSDC_PAD_TUNE, 482 .async_fifo = false, 483 .data_tune = false, 484 .busy_check = false, 485 .stop_clk_fix = false, 486 .enhance_rx = false, 487 .support_64g = false, 488 }; 489 490 static const struct mtk_mmc_compatible mt8173_compat = { 491 .clk_div_bits = 8, 492 .recheck_sdio_irq = true, 493 .hs400_tune = true, 494 .pad_tune_reg = MSDC_PAD_TUNE, 495 .async_fifo = false, 496 .data_tune = false, 497 .busy_check = false, 498 .stop_clk_fix = false, 499 .enhance_rx = false, 500 .support_64g = false, 501 }; 502 503 static const struct mtk_mmc_compatible mt8183_compat = { 504 .clk_div_bits = 12, 505 .recheck_sdio_irq = false, 506 .hs400_tune = false, 507 .pad_tune_reg = MSDC_PAD_TUNE0, 508 .async_fifo = true, 509 .data_tune = true, 510 .busy_check = true, 511 .stop_clk_fix = true, 512 .enhance_rx = true, 513 .support_64g = true, 514 }; 515 516 static const struct mtk_mmc_compatible mt2701_compat = { 517 .clk_div_bits = 12, 518 .recheck_sdio_irq = true, 519 .hs400_tune = false, 520 .pad_tune_reg = MSDC_PAD_TUNE0, 521 .async_fifo = true, 522 .data_tune = true, 523 .busy_check = false, 524 .stop_clk_fix = false, 525 .enhance_rx = false, 526 .support_64g = false, 527 }; 528 529 static const struct mtk_mmc_compatible mt2712_compat = { 530 .clk_div_bits = 12, 531 .recheck_sdio_irq = false, 532 .hs400_tune = false, 533 .pad_tune_reg = MSDC_PAD_TUNE0, 534 .async_fifo = true, 535 .data_tune = true, 536 .busy_check = true, 537 .stop_clk_fix = true, 538 .enhance_rx = true, 539 .support_64g = true, 540 }; 541 542 static const struct mtk_mmc_compatible mt7622_compat = { 543 .clk_div_bits = 12, 544 .recheck_sdio_irq = true, 545 .hs400_tune = false, 546 .pad_tune_reg = MSDC_PAD_TUNE0, 547 .async_fifo = true, 548 .data_tune = true, 549 .busy_check = true, 550 .stop_clk_fix = true, 551 .enhance_rx = true, 552 .support_64g = false, 553 }; 554 555 static const struct mtk_mmc_compatible mt8516_compat = { 556 .clk_div_bits = 12, 557 .recheck_sdio_irq = true, 558 .hs400_tune = false, 559 .pad_tune_reg = MSDC_PAD_TUNE0, 560 .async_fifo = true, 561 .data_tune = true, 562 .busy_check = true, 563 .stop_clk_fix = true, 564 }; 565 566 static const struct mtk_mmc_compatible mt7620_compat = { 567 .clk_div_bits = 8, 568 .recheck_sdio_irq = true, 569 .hs400_tune = false, 570 .pad_tune_reg = MSDC_PAD_TUNE, 571 .async_fifo = false, 572 .data_tune = false, 573 .busy_check = false, 574 .stop_clk_fix = false, 575 .enhance_rx = false, 576 .use_internal_cd = true, 577 }; 578 579 static const struct mtk_mmc_compatible mt6779_compat = { 580 .clk_div_bits = 12, 581 .recheck_sdio_irq = false, 582 .hs400_tune = false, 583 .pad_tune_reg = MSDC_PAD_TUNE0, 584 .async_fifo = true, 585 .data_tune = true, 586 .busy_check = true, 587 .stop_clk_fix = true, 588 .enhance_rx = true, 589 .support_64g = true, 590 }; 591 592 static const struct of_device_id msdc_of_ids[] = { 593 { .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat}, 594 { .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat}, 595 { .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat}, 596 { .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat}, 597 { .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat}, 598 { .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat}, 599 { .compatible = "mediatek,mt8516-mmc", .data = &mt8516_compat}, 600 { .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat}, 601 { .compatible = "mediatek,mt6779-mmc", .data = &mt6779_compat}, 602 {} 603 }; 604 MODULE_DEVICE_TABLE(of, msdc_of_ids); 605 606 static void sdr_set_bits(void __iomem *reg, u32 bs) 607 { 608 u32 val = readl(reg); 609 610 val |= bs; 611 writel(val, reg); 612 } 613 614 static void sdr_clr_bits(void __iomem *reg, u32 bs) 615 { 616 u32 val = readl(reg); 617 618 val &= ~bs; 619 writel(val, reg); 620 } 621 622 static void sdr_set_field(void __iomem *reg, u32 field, u32 val) 623 { 624 unsigned int tv = readl(reg); 625 626 tv &= ~field; 627 tv |= ((val) << (ffs((unsigned int)field) - 1)); 628 writel(tv, reg); 629 } 630 631 static void sdr_get_field(void __iomem *reg, u32 field, u32 *val) 632 { 633 unsigned int tv = readl(reg); 634 635 *val = ((tv & field) >> (ffs((unsigned int)field) - 1)); 636 } 637 638 static void msdc_reset_hw(struct msdc_host *host) 639 { 640 u32 val; 641 642 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST); 643 readl_poll_timeout(host->base + MSDC_CFG, val, !(val & MSDC_CFG_RST), 0, 0); 644 645 sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR); 646 readl_poll_timeout(host->base + MSDC_FIFOCS, val, 647 !(val & MSDC_FIFOCS_CLR), 0, 0); 648 649 val = readl(host->base + MSDC_INT); 650 writel(val, host->base + MSDC_INT); 651 } 652 653 static void msdc_cmd_next(struct msdc_host *host, 654 struct mmc_request *mrq, struct mmc_command *cmd); 655 static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb); 656 657 static const u32 cmd_ints_mask = MSDC_INTEN_CMDRDY | MSDC_INTEN_RSPCRCERR | 658 MSDC_INTEN_CMDTMO | MSDC_INTEN_ACMDRDY | 659 MSDC_INTEN_ACMDCRCERR | MSDC_INTEN_ACMDTMO; 660 static const u32 data_ints_mask = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO | 661 MSDC_INTEN_DATCRCERR | MSDC_INTEN_DMA_BDCSERR | 662 MSDC_INTEN_DMA_GPDCSERR | MSDC_INTEN_DMA_PROTECT; 663 664 static u8 msdc_dma_calcs(u8 *buf, u32 len) 665 { 666 u32 i, sum = 0; 667 668 for (i = 0; i < len; i++) 669 sum += buf[i]; 670 return 0xff - (u8) sum; 671 } 672 673 static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma, 674 struct mmc_data *data) 675 { 676 unsigned int j, dma_len; 677 dma_addr_t dma_address; 678 u32 dma_ctrl; 679 struct scatterlist *sg; 680 struct mt_gpdma_desc *gpd; 681 struct mt_bdma_desc *bd; 682 683 sg = data->sg; 684 685 gpd = dma->gpd; 686 bd = dma->bd; 687 688 /* modify gpd */ 689 gpd->gpd_info |= GPDMA_DESC_HWO; 690 gpd->gpd_info |= GPDMA_DESC_BDP; 691 /* need to clear first. use these bits to calc checksum */ 692 gpd->gpd_info &= ~GPDMA_DESC_CHECKSUM; 693 gpd->gpd_info |= msdc_dma_calcs((u8 *) gpd, 16) << 8; 694 695 /* modify bd */ 696 for_each_sg(data->sg, sg, data->sg_count, j) { 697 dma_address = sg_dma_address(sg); 698 dma_len = sg_dma_len(sg); 699 700 /* init bd */ 701 bd[j].bd_info &= ~BDMA_DESC_BLKPAD; 702 bd[j].bd_info &= ~BDMA_DESC_DWPAD; 703 bd[j].ptr = lower_32_bits(dma_address); 704 if (host->dev_comp->support_64g) { 705 bd[j].bd_info &= ~BDMA_DESC_PTR_H4; 706 bd[j].bd_info |= (upper_32_bits(dma_address) & 0xf) 707 << 28; 708 } 709 710 if (host->dev_comp->support_64g) { 711 bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN_EXT; 712 bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN_EXT); 713 } else { 714 bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN; 715 bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN); 716 } 717 718 if (j == data->sg_count - 1) /* the last bd */ 719 bd[j].bd_info |= BDMA_DESC_EOL; 720 else 721 bd[j].bd_info &= ~BDMA_DESC_EOL; 722 723 /* checksume need to clear first */ 724 bd[j].bd_info &= ~BDMA_DESC_CHECKSUM; 725 bd[j].bd_info |= msdc_dma_calcs((u8 *)(&bd[j]), 16) << 8; 726 } 727 728 sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1); 729 dma_ctrl = readl_relaxed(host->base + MSDC_DMA_CTRL); 730 dma_ctrl &= ~(MSDC_DMA_CTRL_BRUSTSZ | MSDC_DMA_CTRL_MODE); 731 dma_ctrl |= (MSDC_BURST_64B << 12 | BIT(8)); 732 writel_relaxed(dma_ctrl, host->base + MSDC_DMA_CTRL); 733 if (host->dev_comp->support_64g) 734 sdr_set_field(host->base + DMA_SA_H4BIT, DMA_ADDR_HIGH_4BIT, 735 upper_32_bits(dma->gpd_addr) & 0xf); 736 writel(lower_32_bits(dma->gpd_addr), host->base + MSDC_DMA_SA); 737 } 738 739 static void msdc_prepare_data(struct msdc_host *host, struct mmc_data *data) 740 { 741 if (!(data->host_cookie & MSDC_PREPARE_FLAG)) { 742 data->host_cookie |= MSDC_PREPARE_FLAG; 743 data->sg_count = dma_map_sg(host->dev, data->sg, data->sg_len, 744 mmc_get_dma_dir(data)); 745 } 746 } 747 748 static void msdc_unprepare_data(struct msdc_host *host, struct mmc_data *data) 749 { 750 if (data->host_cookie & MSDC_ASYNC_FLAG) 751 return; 752 753 if (data->host_cookie & MSDC_PREPARE_FLAG) { 754 dma_unmap_sg(host->dev, data->sg, data->sg_len, 755 mmc_get_dma_dir(data)); 756 data->host_cookie &= ~MSDC_PREPARE_FLAG; 757 } 758 } 759 760 static u64 msdc_timeout_cal(struct msdc_host *host, u64 ns, u64 clks) 761 { 762 struct mmc_host *mmc = mmc_from_priv(host); 763 u64 timeout, clk_ns; 764 u32 mode = 0; 765 766 if (mmc->actual_clock == 0) { 767 timeout = 0; 768 } else { 769 clk_ns = 1000000000ULL; 770 do_div(clk_ns, mmc->actual_clock); 771 timeout = ns + clk_ns - 1; 772 do_div(timeout, clk_ns); 773 timeout += clks; 774 /* in 1048576 sclk cycle unit */ 775 timeout = DIV_ROUND_UP(timeout, BIT(20)); 776 if (host->dev_comp->clk_div_bits == 8) 777 sdr_get_field(host->base + MSDC_CFG, 778 MSDC_CFG_CKMOD, &mode); 779 else 780 sdr_get_field(host->base + MSDC_CFG, 781 MSDC_CFG_CKMOD_EXTRA, &mode); 782 /*DDR mode will double the clk cycles for data timeout */ 783 timeout = mode >= 2 ? timeout * 2 : timeout; 784 timeout = timeout > 1 ? timeout - 1 : 0; 785 } 786 return timeout; 787 } 788 789 /* clock control primitives */ 790 static void msdc_set_timeout(struct msdc_host *host, u64 ns, u64 clks) 791 { 792 u64 timeout; 793 794 host->timeout_ns = ns; 795 host->timeout_clks = clks; 796 797 timeout = msdc_timeout_cal(host, ns, clks); 798 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 799 (u32)(timeout > 255 ? 255 : timeout)); 800 } 801 802 static void msdc_set_busy_timeout(struct msdc_host *host, u64 ns, u64 clks) 803 { 804 u64 timeout; 805 806 timeout = msdc_timeout_cal(host, ns, clks); 807 sdr_set_field(host->base + SDC_CFG, SDC_CFG_WRDTOC, 808 (u32)(timeout > 8191 ? 8191 : timeout)); 809 } 810 811 static void msdc_gate_clock(struct msdc_host *host) 812 { 813 clk_bulk_disable_unprepare(MSDC_NR_CLOCKS, host->bulk_clks); 814 clk_disable_unprepare(host->src_clk_cg); 815 clk_disable_unprepare(host->src_clk); 816 clk_disable_unprepare(host->bus_clk); 817 clk_disable_unprepare(host->h_clk); 818 } 819 820 static int msdc_ungate_clock(struct msdc_host *host) 821 { 822 u32 val; 823 int ret; 824 825 clk_prepare_enable(host->h_clk); 826 clk_prepare_enable(host->bus_clk); 827 clk_prepare_enable(host->src_clk); 828 clk_prepare_enable(host->src_clk_cg); 829 ret = clk_bulk_prepare_enable(MSDC_NR_CLOCKS, host->bulk_clks); 830 if (ret) { 831 dev_err(host->dev, "Cannot enable pclk/axi/ahb clock gates\n"); 832 return ret; 833 } 834 835 return readl_poll_timeout(host->base + MSDC_CFG, val, 836 (val & MSDC_CFG_CKSTB), 1, 20000); 837 } 838 839 static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz) 840 { 841 struct mmc_host *mmc = mmc_from_priv(host); 842 u32 mode; 843 u32 flags; 844 u32 div; 845 u32 sclk; 846 u32 tune_reg = host->dev_comp->pad_tune_reg; 847 u32 val; 848 849 if (!hz) { 850 dev_dbg(host->dev, "set mclk to 0\n"); 851 host->mclk = 0; 852 mmc->actual_clock = 0; 853 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN); 854 return; 855 } 856 857 flags = readl(host->base + MSDC_INTEN); 858 sdr_clr_bits(host->base + MSDC_INTEN, flags); 859 if (host->dev_comp->clk_div_bits == 8) 860 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE); 861 else 862 sdr_clr_bits(host->base + MSDC_CFG, 863 MSDC_CFG_HS400_CK_MODE_EXTRA); 864 if (timing == MMC_TIMING_UHS_DDR50 || 865 timing == MMC_TIMING_MMC_DDR52 || 866 timing == MMC_TIMING_MMC_HS400) { 867 if (timing == MMC_TIMING_MMC_HS400) 868 mode = 0x3; 869 else 870 mode = 0x2; /* ddr mode and use divisor */ 871 872 if (hz >= (host->src_clk_freq >> 2)) { 873 div = 0; /* mean div = 1/4 */ 874 sclk = host->src_clk_freq >> 2; /* sclk = clk / 4 */ 875 } else { 876 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2); 877 sclk = (host->src_clk_freq >> 2) / div; 878 div = (div >> 1); 879 } 880 881 if (timing == MMC_TIMING_MMC_HS400 && 882 hz >= (host->src_clk_freq >> 1)) { 883 if (host->dev_comp->clk_div_bits == 8) 884 sdr_set_bits(host->base + MSDC_CFG, 885 MSDC_CFG_HS400_CK_MODE); 886 else 887 sdr_set_bits(host->base + MSDC_CFG, 888 MSDC_CFG_HS400_CK_MODE_EXTRA); 889 sclk = host->src_clk_freq >> 1; 890 div = 0; /* div is ignore when bit18 is set */ 891 } 892 } else if (hz >= host->src_clk_freq) { 893 mode = 0x1; /* no divisor */ 894 div = 0; 895 sclk = host->src_clk_freq; 896 } else { 897 mode = 0x0; /* use divisor */ 898 if (hz >= (host->src_clk_freq >> 1)) { 899 div = 0; /* mean div = 1/2 */ 900 sclk = host->src_clk_freq >> 1; /* sclk = clk / 2 */ 901 } else { 902 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2); 903 sclk = (host->src_clk_freq >> 2) / div; 904 } 905 } 906 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN); 907 908 clk_disable_unprepare(host->src_clk_cg); 909 if (host->dev_comp->clk_div_bits == 8) 910 sdr_set_field(host->base + MSDC_CFG, 911 MSDC_CFG_CKMOD | MSDC_CFG_CKDIV, 912 (mode << 8) | div); 913 else 914 sdr_set_field(host->base + MSDC_CFG, 915 MSDC_CFG_CKMOD_EXTRA | MSDC_CFG_CKDIV_EXTRA, 916 (mode << 12) | div); 917 918 clk_prepare_enable(host->src_clk_cg); 919 readl_poll_timeout(host->base + MSDC_CFG, val, (val & MSDC_CFG_CKSTB), 0, 0); 920 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN); 921 mmc->actual_clock = sclk; 922 host->mclk = hz; 923 host->timing = timing; 924 /* need because clk changed. */ 925 msdc_set_timeout(host, host->timeout_ns, host->timeout_clks); 926 sdr_set_bits(host->base + MSDC_INTEN, flags); 927 928 /* 929 * mmc_select_hs400() will drop to 50Mhz and High speed mode, 930 * tune result of hs200/200Mhz is not suitable for 50Mhz 931 */ 932 if (mmc->actual_clock <= 52000000) { 933 writel(host->def_tune_para.iocon, host->base + MSDC_IOCON); 934 if (host->top_base) { 935 writel(host->def_tune_para.emmc_top_control, 936 host->top_base + EMMC_TOP_CONTROL); 937 writel(host->def_tune_para.emmc_top_cmd, 938 host->top_base + EMMC_TOP_CMD); 939 } else { 940 writel(host->def_tune_para.pad_tune, 941 host->base + tune_reg); 942 } 943 } else { 944 writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON); 945 writel(host->saved_tune_para.pad_cmd_tune, 946 host->base + PAD_CMD_TUNE); 947 if (host->top_base) { 948 writel(host->saved_tune_para.emmc_top_control, 949 host->top_base + EMMC_TOP_CONTROL); 950 writel(host->saved_tune_para.emmc_top_cmd, 951 host->top_base + EMMC_TOP_CMD); 952 } else { 953 writel(host->saved_tune_para.pad_tune, 954 host->base + tune_reg); 955 } 956 } 957 958 if (timing == MMC_TIMING_MMC_HS400 && 959 host->dev_comp->hs400_tune) 960 sdr_set_field(host->base + tune_reg, 961 MSDC_PAD_TUNE_CMDRRDLY, 962 host->hs400_cmd_int_delay); 963 dev_dbg(host->dev, "sclk: %d, timing: %d\n", mmc->actual_clock, 964 timing); 965 } 966 967 static inline u32 msdc_cmd_find_resp(struct msdc_host *host, 968 struct mmc_command *cmd) 969 { 970 u32 resp; 971 972 switch (mmc_resp_type(cmd)) { 973 /* Actually, R1, R5, R6, R7 are the same */ 974 case MMC_RSP_R1: 975 resp = 0x1; 976 break; 977 case MMC_RSP_R1B: 978 resp = 0x7; 979 break; 980 case MMC_RSP_R2: 981 resp = 0x2; 982 break; 983 case MMC_RSP_R3: 984 resp = 0x3; 985 break; 986 case MMC_RSP_NONE: 987 default: 988 resp = 0x0; 989 break; 990 } 991 992 return resp; 993 } 994 995 static inline u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host, 996 struct mmc_request *mrq, struct mmc_command *cmd) 997 { 998 struct mmc_host *mmc = mmc_from_priv(host); 999 /* rawcmd : 1000 * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 | 1001 * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode 1002 */ 1003 u32 opcode = cmd->opcode; 1004 u32 resp = msdc_cmd_find_resp(host, cmd); 1005 u32 rawcmd = (opcode & 0x3f) | ((resp & 0x7) << 7); 1006 1007 host->cmd_rsp = resp; 1008 1009 if ((opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int) -1) || 1010 opcode == MMC_STOP_TRANSMISSION) 1011 rawcmd |= BIT(14); 1012 else if (opcode == SD_SWITCH_VOLTAGE) 1013 rawcmd |= BIT(30); 1014 else if (opcode == SD_APP_SEND_SCR || 1015 opcode == SD_APP_SEND_NUM_WR_BLKS || 1016 (opcode == SD_SWITCH && mmc_cmd_type(cmd) == MMC_CMD_ADTC) || 1017 (opcode == SD_APP_SD_STATUS && mmc_cmd_type(cmd) == MMC_CMD_ADTC) || 1018 (opcode == MMC_SEND_EXT_CSD && mmc_cmd_type(cmd) == MMC_CMD_ADTC)) 1019 rawcmd |= BIT(11); 1020 1021 if (cmd->data) { 1022 struct mmc_data *data = cmd->data; 1023 1024 if (mmc_op_multi(opcode)) { 1025 if (mmc_card_mmc(mmc->card) && mrq->sbc && 1026 !(mrq->sbc->arg & 0xFFFF0000)) 1027 rawcmd |= BIT(29); /* AutoCMD23 */ 1028 } 1029 1030 rawcmd |= ((data->blksz & 0xFFF) << 16); 1031 if (data->flags & MMC_DATA_WRITE) 1032 rawcmd |= BIT(13); 1033 if (data->blocks > 1) 1034 rawcmd |= BIT(12); 1035 else 1036 rawcmd |= BIT(11); 1037 /* Always use dma mode */ 1038 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO); 1039 1040 if (host->timeout_ns != data->timeout_ns || 1041 host->timeout_clks != data->timeout_clks) 1042 msdc_set_timeout(host, data->timeout_ns, 1043 data->timeout_clks); 1044 1045 writel(data->blocks, host->base + SDC_BLK_NUM); 1046 } 1047 return rawcmd; 1048 } 1049 1050 static void msdc_start_data(struct msdc_host *host, struct mmc_command *cmd, 1051 struct mmc_data *data) 1052 { 1053 bool read; 1054 1055 WARN_ON(host->data); 1056 host->data = data; 1057 read = data->flags & MMC_DATA_READ; 1058 1059 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT); 1060 msdc_dma_setup(host, &host->dma, data); 1061 sdr_set_bits(host->base + MSDC_INTEN, data_ints_mask); 1062 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1); 1063 dev_dbg(host->dev, "DMA start\n"); 1064 dev_dbg(host->dev, "%s: cmd=%d DMA data: %d blocks; read=%d\n", 1065 __func__, cmd->opcode, data->blocks, read); 1066 } 1067 1068 static int msdc_auto_cmd_done(struct msdc_host *host, int events, 1069 struct mmc_command *cmd) 1070 { 1071 u32 *rsp = cmd->resp; 1072 1073 rsp[0] = readl(host->base + SDC_ACMD_RESP); 1074 1075 if (events & MSDC_INT_ACMDRDY) { 1076 cmd->error = 0; 1077 } else { 1078 msdc_reset_hw(host); 1079 if (events & MSDC_INT_ACMDCRCERR) { 1080 cmd->error = -EILSEQ; 1081 host->error |= REQ_STOP_EIO; 1082 } else if (events & MSDC_INT_ACMDTMO) { 1083 cmd->error = -ETIMEDOUT; 1084 host->error |= REQ_STOP_TMO; 1085 } 1086 dev_err(host->dev, 1087 "%s: AUTO_CMD%d arg=%08X; rsp %08X; cmd_error=%d\n", 1088 __func__, cmd->opcode, cmd->arg, rsp[0], cmd->error); 1089 } 1090 return cmd->error; 1091 } 1092 1093 /* 1094 * msdc_recheck_sdio_irq - recheck whether the SDIO irq is lost 1095 * 1096 * Host controller may lost interrupt in some special case. 1097 * Add SDIO irq recheck mechanism to make sure all interrupts 1098 * can be processed immediately 1099 */ 1100 static void msdc_recheck_sdio_irq(struct msdc_host *host) 1101 { 1102 struct mmc_host *mmc = mmc_from_priv(host); 1103 u32 reg_int, reg_inten, reg_ps; 1104 1105 if (mmc->caps & MMC_CAP_SDIO_IRQ) { 1106 reg_inten = readl(host->base + MSDC_INTEN); 1107 if (reg_inten & MSDC_INTEN_SDIOIRQ) { 1108 reg_int = readl(host->base + MSDC_INT); 1109 reg_ps = readl(host->base + MSDC_PS); 1110 if (!(reg_int & MSDC_INT_SDIOIRQ || 1111 reg_ps & MSDC_PS_DATA1)) { 1112 __msdc_enable_sdio_irq(host, 0); 1113 sdio_signal_irq(mmc); 1114 } 1115 } 1116 } 1117 } 1118 1119 static void msdc_track_cmd_data(struct msdc_host *host, struct mmc_command *cmd) 1120 { 1121 if (host->error) 1122 dev_dbg(host->dev, "%s: cmd=%d arg=%08X; host->error=0x%08X\n", 1123 __func__, cmd->opcode, cmd->arg, host->error); 1124 } 1125 1126 static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq) 1127 { 1128 unsigned long flags; 1129 1130 /* 1131 * No need check the return value of cancel_delayed_work, as only ONE 1132 * path will go here! 1133 */ 1134 cancel_delayed_work(&host->req_timeout); 1135 1136 spin_lock_irqsave(&host->lock, flags); 1137 host->mrq = NULL; 1138 spin_unlock_irqrestore(&host->lock, flags); 1139 1140 msdc_track_cmd_data(host, mrq->cmd); 1141 if (mrq->data) 1142 msdc_unprepare_data(host, mrq->data); 1143 if (host->error) 1144 msdc_reset_hw(host); 1145 mmc_request_done(mmc_from_priv(host), mrq); 1146 if (host->dev_comp->recheck_sdio_irq) 1147 msdc_recheck_sdio_irq(host); 1148 } 1149 1150 /* returns true if command is fully handled; returns false otherwise */ 1151 static bool msdc_cmd_done(struct msdc_host *host, int events, 1152 struct mmc_request *mrq, struct mmc_command *cmd) 1153 { 1154 bool done = false; 1155 bool sbc_error; 1156 unsigned long flags; 1157 u32 *rsp; 1158 1159 if (mrq->sbc && cmd == mrq->cmd && 1160 (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR 1161 | MSDC_INT_ACMDTMO))) 1162 msdc_auto_cmd_done(host, events, mrq->sbc); 1163 1164 sbc_error = mrq->sbc && mrq->sbc->error; 1165 1166 if (!sbc_error && !(events & (MSDC_INT_CMDRDY 1167 | MSDC_INT_RSPCRCERR 1168 | MSDC_INT_CMDTMO))) 1169 return done; 1170 1171 spin_lock_irqsave(&host->lock, flags); 1172 done = !host->cmd; 1173 host->cmd = NULL; 1174 spin_unlock_irqrestore(&host->lock, flags); 1175 1176 if (done) 1177 return true; 1178 rsp = cmd->resp; 1179 1180 sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask); 1181 1182 if (cmd->flags & MMC_RSP_PRESENT) { 1183 if (cmd->flags & MMC_RSP_136) { 1184 rsp[0] = readl(host->base + SDC_RESP3); 1185 rsp[1] = readl(host->base + SDC_RESP2); 1186 rsp[2] = readl(host->base + SDC_RESP1); 1187 rsp[3] = readl(host->base + SDC_RESP0); 1188 } else { 1189 rsp[0] = readl(host->base + SDC_RESP0); 1190 } 1191 } 1192 1193 if (!sbc_error && !(events & MSDC_INT_CMDRDY)) { 1194 if (events & MSDC_INT_CMDTMO || 1195 (cmd->opcode != MMC_SEND_TUNING_BLOCK && 1196 cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200 && 1197 !host->hs400_tuning)) 1198 /* 1199 * should not clear fifo/interrupt as the tune data 1200 * may have alreay come when cmd19/cmd21 gets response 1201 * CRC error. 1202 */ 1203 msdc_reset_hw(host); 1204 if (events & MSDC_INT_RSPCRCERR) { 1205 cmd->error = -EILSEQ; 1206 host->error |= REQ_CMD_EIO; 1207 } else if (events & MSDC_INT_CMDTMO) { 1208 cmd->error = -ETIMEDOUT; 1209 host->error |= REQ_CMD_TMO; 1210 } 1211 } 1212 if (cmd->error) 1213 dev_dbg(host->dev, 1214 "%s: cmd=%d arg=%08X; rsp %08X; cmd_error=%d\n", 1215 __func__, cmd->opcode, cmd->arg, rsp[0], 1216 cmd->error); 1217 1218 msdc_cmd_next(host, mrq, cmd); 1219 return true; 1220 } 1221 1222 /* It is the core layer's responsibility to ensure card status 1223 * is correct before issue a request. but host design do below 1224 * checks recommended. 1225 */ 1226 static inline bool msdc_cmd_is_ready(struct msdc_host *host, 1227 struct mmc_request *mrq, struct mmc_command *cmd) 1228 { 1229 u32 val; 1230 int ret; 1231 1232 /* The max busy time we can endure is 20ms */ 1233 ret = readl_poll_timeout_atomic(host->base + SDC_STS, val, 1234 !(val & SDC_STS_CMDBUSY), 1, 20000); 1235 if (ret) { 1236 dev_err(host->dev, "CMD bus busy detected\n"); 1237 host->error |= REQ_CMD_BUSY; 1238 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd); 1239 return false; 1240 } 1241 1242 if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) { 1243 /* R1B or with data, should check SDCBUSY */ 1244 ret = readl_poll_timeout_atomic(host->base + SDC_STS, val, 1245 !(val & SDC_STS_SDCBUSY), 1, 20000); 1246 if (ret) { 1247 dev_err(host->dev, "Controller busy detected\n"); 1248 host->error |= REQ_CMD_BUSY; 1249 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd); 1250 return false; 1251 } 1252 } 1253 return true; 1254 } 1255 1256 static void msdc_start_command(struct msdc_host *host, 1257 struct mmc_request *mrq, struct mmc_command *cmd) 1258 { 1259 u32 rawcmd; 1260 unsigned long flags; 1261 1262 WARN_ON(host->cmd); 1263 host->cmd = cmd; 1264 1265 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT); 1266 if (!msdc_cmd_is_ready(host, mrq, cmd)) 1267 return; 1268 1269 if ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16 || 1270 readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) { 1271 dev_err(host->dev, "TX/RX FIFO non-empty before start of IO. Reset\n"); 1272 msdc_reset_hw(host); 1273 } 1274 1275 cmd->error = 0; 1276 rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd); 1277 1278 spin_lock_irqsave(&host->lock, flags); 1279 sdr_set_bits(host->base + MSDC_INTEN, cmd_ints_mask); 1280 spin_unlock_irqrestore(&host->lock, flags); 1281 1282 writel(cmd->arg, host->base + SDC_ARG); 1283 writel(rawcmd, host->base + SDC_CMD); 1284 } 1285 1286 static void msdc_cmd_next(struct msdc_host *host, 1287 struct mmc_request *mrq, struct mmc_command *cmd) 1288 { 1289 if ((cmd->error && 1290 !(cmd->error == -EILSEQ && 1291 (cmd->opcode == MMC_SEND_TUNING_BLOCK || 1292 cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200 || 1293 host->hs400_tuning))) || 1294 (mrq->sbc && mrq->sbc->error)) 1295 msdc_request_done(host, mrq); 1296 else if (cmd == mrq->sbc) 1297 msdc_start_command(host, mrq, mrq->cmd); 1298 else if (!cmd->data) 1299 msdc_request_done(host, mrq); 1300 else 1301 msdc_start_data(host, cmd, cmd->data); 1302 } 1303 1304 static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq) 1305 { 1306 struct msdc_host *host = mmc_priv(mmc); 1307 1308 host->error = 0; 1309 WARN_ON(host->mrq); 1310 host->mrq = mrq; 1311 1312 if (mrq->data) 1313 msdc_prepare_data(host, mrq->data); 1314 1315 /* if SBC is required, we have HW option and SW option. 1316 * if HW option is enabled, and SBC does not have "special" flags, 1317 * use HW option, otherwise use SW option 1318 */ 1319 if (mrq->sbc && (!mmc_card_mmc(mmc->card) || 1320 (mrq->sbc->arg & 0xFFFF0000))) 1321 msdc_start_command(host, mrq, mrq->sbc); 1322 else 1323 msdc_start_command(host, mrq, mrq->cmd); 1324 } 1325 1326 static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq) 1327 { 1328 struct msdc_host *host = mmc_priv(mmc); 1329 struct mmc_data *data = mrq->data; 1330 1331 if (!data) 1332 return; 1333 1334 msdc_prepare_data(host, data); 1335 data->host_cookie |= MSDC_ASYNC_FLAG; 1336 } 1337 1338 static void msdc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, 1339 int err) 1340 { 1341 struct msdc_host *host = mmc_priv(mmc); 1342 struct mmc_data *data = mrq->data; 1343 1344 if (!data) 1345 return; 1346 1347 if (data->host_cookie) { 1348 data->host_cookie &= ~MSDC_ASYNC_FLAG; 1349 msdc_unprepare_data(host, data); 1350 } 1351 } 1352 1353 static void msdc_data_xfer_next(struct msdc_host *host, struct mmc_request *mrq) 1354 { 1355 if (mmc_op_multi(mrq->cmd->opcode) && mrq->stop && !mrq->stop->error && 1356 !mrq->sbc) 1357 msdc_start_command(host, mrq, mrq->stop); 1358 else 1359 msdc_request_done(host, mrq); 1360 } 1361 1362 static void msdc_data_xfer_done(struct msdc_host *host, u32 events, 1363 struct mmc_request *mrq, struct mmc_data *data) 1364 { 1365 struct mmc_command *stop; 1366 unsigned long flags; 1367 bool done; 1368 unsigned int check_data = events & 1369 (MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO 1370 | MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR 1371 | MSDC_INT_DMA_PROTECT); 1372 u32 val; 1373 int ret; 1374 1375 spin_lock_irqsave(&host->lock, flags); 1376 done = !host->data; 1377 if (check_data) 1378 host->data = NULL; 1379 spin_unlock_irqrestore(&host->lock, flags); 1380 1381 if (done) 1382 return; 1383 stop = data->stop; 1384 1385 if (check_data || (stop && stop->error)) { 1386 dev_dbg(host->dev, "DMA status: 0x%8X\n", 1387 readl(host->base + MSDC_DMA_CFG)); 1388 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP, 1389 1); 1390 1391 ret = readl_poll_timeout_atomic(host->base + MSDC_DMA_CTRL, val, 1392 !(val & MSDC_DMA_CTRL_STOP), 1, 20000); 1393 if (ret) 1394 dev_dbg(host->dev, "DMA stop timed out\n"); 1395 1396 ret = readl_poll_timeout_atomic(host->base + MSDC_DMA_CFG, val, 1397 !(val & MSDC_DMA_CFG_STS), 1, 20000); 1398 if (ret) 1399 dev_dbg(host->dev, "DMA inactive timed out\n"); 1400 1401 sdr_clr_bits(host->base + MSDC_INTEN, data_ints_mask); 1402 dev_dbg(host->dev, "DMA stop\n"); 1403 1404 if ((events & MSDC_INT_XFER_COMPL) && (!stop || !stop->error)) { 1405 data->bytes_xfered = data->blocks * data->blksz; 1406 } else { 1407 dev_dbg(host->dev, "interrupt events: %x\n", events); 1408 msdc_reset_hw(host); 1409 host->error |= REQ_DAT_ERR; 1410 data->bytes_xfered = 0; 1411 1412 if (events & MSDC_INT_DATTMO) 1413 data->error = -ETIMEDOUT; 1414 else if (events & MSDC_INT_DATCRCERR) 1415 data->error = -EILSEQ; 1416 1417 dev_dbg(host->dev, "%s: cmd=%d; blocks=%d", 1418 __func__, mrq->cmd->opcode, data->blocks); 1419 dev_dbg(host->dev, "data_error=%d xfer_size=%d\n", 1420 (int)data->error, data->bytes_xfered); 1421 } 1422 1423 msdc_data_xfer_next(host, mrq); 1424 } 1425 } 1426 1427 static void msdc_set_buswidth(struct msdc_host *host, u32 width) 1428 { 1429 u32 val = readl(host->base + SDC_CFG); 1430 1431 val &= ~SDC_CFG_BUSWIDTH; 1432 1433 switch (width) { 1434 default: 1435 case MMC_BUS_WIDTH_1: 1436 val |= (MSDC_BUS_1BITS << 16); 1437 break; 1438 case MMC_BUS_WIDTH_4: 1439 val |= (MSDC_BUS_4BITS << 16); 1440 break; 1441 case MMC_BUS_WIDTH_8: 1442 val |= (MSDC_BUS_8BITS << 16); 1443 break; 1444 } 1445 1446 writel(val, host->base + SDC_CFG); 1447 dev_dbg(host->dev, "Bus Width = %d", width); 1448 } 1449 1450 static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios) 1451 { 1452 struct msdc_host *host = mmc_priv(mmc); 1453 int ret; 1454 1455 if (!IS_ERR(mmc->supply.vqmmc)) { 1456 if (ios->signal_voltage != MMC_SIGNAL_VOLTAGE_330 && 1457 ios->signal_voltage != MMC_SIGNAL_VOLTAGE_180) { 1458 dev_err(host->dev, "Unsupported signal voltage!\n"); 1459 return -EINVAL; 1460 } 1461 1462 ret = mmc_regulator_set_vqmmc(mmc, ios); 1463 if (ret < 0) { 1464 dev_dbg(host->dev, "Regulator set error %d (%d)\n", 1465 ret, ios->signal_voltage); 1466 return ret; 1467 } 1468 1469 /* Apply different pinctrl settings for different signal voltage */ 1470 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) 1471 pinctrl_select_state(host->pinctrl, host->pins_uhs); 1472 else 1473 pinctrl_select_state(host->pinctrl, host->pins_default); 1474 } 1475 return 0; 1476 } 1477 1478 static int msdc_card_busy(struct mmc_host *mmc) 1479 { 1480 struct msdc_host *host = mmc_priv(mmc); 1481 u32 status = readl(host->base + MSDC_PS); 1482 1483 /* only check if data0 is low */ 1484 return !(status & BIT(16)); 1485 } 1486 1487 static void msdc_request_timeout(struct work_struct *work) 1488 { 1489 struct msdc_host *host = container_of(work, struct msdc_host, 1490 req_timeout.work); 1491 1492 /* simulate HW timeout status */ 1493 dev_err(host->dev, "%s: aborting cmd/data/mrq\n", __func__); 1494 if (host->mrq) { 1495 dev_err(host->dev, "%s: aborting mrq=%p cmd=%d\n", __func__, 1496 host->mrq, host->mrq->cmd->opcode); 1497 if (host->cmd) { 1498 dev_err(host->dev, "%s: aborting cmd=%d\n", 1499 __func__, host->cmd->opcode); 1500 msdc_cmd_done(host, MSDC_INT_CMDTMO, host->mrq, 1501 host->cmd); 1502 } else if (host->data) { 1503 dev_err(host->dev, "%s: abort data: cmd%d; %d blocks\n", 1504 __func__, host->mrq->cmd->opcode, 1505 host->data->blocks); 1506 msdc_data_xfer_done(host, MSDC_INT_DATTMO, host->mrq, 1507 host->data); 1508 } 1509 } 1510 } 1511 1512 static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb) 1513 { 1514 if (enb) { 1515 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ); 1516 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); 1517 if (host->dev_comp->recheck_sdio_irq) 1518 msdc_recheck_sdio_irq(host); 1519 } else { 1520 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ); 1521 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); 1522 } 1523 } 1524 1525 static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb) 1526 { 1527 struct msdc_host *host = mmc_priv(mmc); 1528 unsigned long flags; 1529 int ret; 1530 1531 spin_lock_irqsave(&host->lock, flags); 1532 __msdc_enable_sdio_irq(host, enb); 1533 spin_unlock_irqrestore(&host->lock, flags); 1534 1535 if (mmc_card_enable_async_irq(mmc->card) && host->pins_eint) { 1536 if (enb) { 1537 /* 1538 * In dev_pm_set_dedicated_wake_irq_reverse(), eint pin will be set to 1539 * GPIO mode. We need to restore it to SDIO DAT1 mode after that. 1540 * Since the current pinstate is pins_uhs, to ensure pinctrl select take 1541 * affect successfully, we change the pinstate to pins_eint firstly. 1542 */ 1543 pinctrl_select_state(host->pinctrl, host->pins_eint); 1544 ret = dev_pm_set_dedicated_wake_irq_reverse(host->dev, host->eint_irq); 1545 1546 if (ret) { 1547 dev_err(host->dev, "Failed to register SDIO wakeup irq!\n"); 1548 host->pins_eint = NULL; 1549 pm_runtime_get_noresume(host->dev); 1550 } else { 1551 dev_dbg(host->dev, "SDIO eint irq: %d!\n", host->eint_irq); 1552 } 1553 1554 pinctrl_select_state(host->pinctrl, host->pins_uhs); 1555 } else { 1556 dev_pm_clear_wake_irq(host->dev); 1557 } 1558 } else { 1559 if (enb) { 1560 /* Ensure host->pins_eint is NULL */ 1561 host->pins_eint = NULL; 1562 pm_runtime_get_noresume(host->dev); 1563 } else { 1564 pm_runtime_put_noidle(host->dev); 1565 } 1566 } 1567 } 1568 1569 static irqreturn_t msdc_cmdq_irq(struct msdc_host *host, u32 intsts) 1570 { 1571 struct mmc_host *mmc = mmc_from_priv(host); 1572 int cmd_err = 0, dat_err = 0; 1573 1574 if (intsts & MSDC_INT_RSPCRCERR) { 1575 cmd_err = -EILSEQ; 1576 dev_err(host->dev, "%s: CMD CRC ERR", __func__); 1577 } else if (intsts & MSDC_INT_CMDTMO) { 1578 cmd_err = -ETIMEDOUT; 1579 dev_err(host->dev, "%s: CMD TIMEOUT ERR", __func__); 1580 } 1581 1582 if (intsts & MSDC_INT_DATCRCERR) { 1583 dat_err = -EILSEQ; 1584 dev_err(host->dev, "%s: DATA CRC ERR", __func__); 1585 } else if (intsts & MSDC_INT_DATTMO) { 1586 dat_err = -ETIMEDOUT; 1587 dev_err(host->dev, "%s: DATA TIMEOUT ERR", __func__); 1588 } 1589 1590 if (cmd_err || dat_err) { 1591 dev_err(host->dev, "cmd_err = %d, dat_err =%d, intsts = 0x%x", 1592 cmd_err, dat_err, intsts); 1593 } 1594 1595 return cqhci_irq(mmc, 0, cmd_err, dat_err); 1596 } 1597 1598 static irqreturn_t msdc_irq(int irq, void *dev_id) 1599 { 1600 struct msdc_host *host = (struct msdc_host *) dev_id; 1601 struct mmc_host *mmc = mmc_from_priv(host); 1602 1603 while (true) { 1604 struct mmc_request *mrq; 1605 struct mmc_command *cmd; 1606 struct mmc_data *data; 1607 u32 events, event_mask; 1608 1609 spin_lock(&host->lock); 1610 events = readl(host->base + MSDC_INT); 1611 event_mask = readl(host->base + MSDC_INTEN); 1612 if ((events & event_mask) & MSDC_INT_SDIOIRQ) 1613 __msdc_enable_sdio_irq(host, 0); 1614 /* clear interrupts */ 1615 writel(events & event_mask, host->base + MSDC_INT); 1616 1617 mrq = host->mrq; 1618 cmd = host->cmd; 1619 data = host->data; 1620 spin_unlock(&host->lock); 1621 1622 if ((events & event_mask) & MSDC_INT_SDIOIRQ) 1623 sdio_signal_irq(mmc); 1624 1625 if ((events & event_mask) & MSDC_INT_CDSC) { 1626 if (host->internal_cd) 1627 mmc_detect_change(mmc, msecs_to_jiffies(20)); 1628 events &= ~MSDC_INT_CDSC; 1629 } 1630 1631 if (!(events & (event_mask & ~MSDC_INT_SDIOIRQ))) 1632 break; 1633 1634 if ((mmc->caps2 & MMC_CAP2_CQE) && 1635 (events & MSDC_INT_CMDQ)) { 1636 msdc_cmdq_irq(host, events); 1637 /* clear interrupts */ 1638 writel(events, host->base + MSDC_INT); 1639 return IRQ_HANDLED; 1640 } 1641 1642 if (!mrq) { 1643 dev_err(host->dev, 1644 "%s: MRQ=NULL; events=%08X; event_mask=%08X\n", 1645 __func__, events, event_mask); 1646 WARN_ON(1); 1647 break; 1648 } 1649 1650 dev_dbg(host->dev, "%s: events=%08X\n", __func__, events); 1651 1652 if (cmd) 1653 msdc_cmd_done(host, events, mrq, cmd); 1654 else if (data) 1655 msdc_data_xfer_done(host, events, mrq, data); 1656 } 1657 1658 return IRQ_HANDLED; 1659 } 1660 1661 static void msdc_init_hw(struct msdc_host *host) 1662 { 1663 u32 val; 1664 u32 tune_reg = host->dev_comp->pad_tune_reg; 1665 struct mmc_host *mmc = mmc_from_priv(host); 1666 1667 if (host->reset) { 1668 reset_control_assert(host->reset); 1669 usleep_range(10, 50); 1670 reset_control_deassert(host->reset); 1671 } 1672 1673 /* Configure to MMC/SD mode, clock free running */ 1674 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN); 1675 1676 /* Reset */ 1677 msdc_reset_hw(host); 1678 1679 /* Disable and clear all interrupts */ 1680 writel(0, host->base + MSDC_INTEN); 1681 val = readl(host->base + MSDC_INT); 1682 writel(val, host->base + MSDC_INT); 1683 1684 /* Configure card detection */ 1685 if (host->internal_cd) { 1686 sdr_set_field(host->base + MSDC_PS, MSDC_PS_CDDEBOUNCE, 1687 DEFAULT_DEBOUNCE); 1688 sdr_set_bits(host->base + MSDC_PS, MSDC_PS_CDEN); 1689 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC); 1690 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP); 1691 } else { 1692 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP); 1693 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN); 1694 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC); 1695 } 1696 1697 if (host->top_base) { 1698 writel(0, host->top_base + EMMC_TOP_CONTROL); 1699 writel(0, host->top_base + EMMC_TOP_CMD); 1700 } else { 1701 writel(0, host->base + tune_reg); 1702 } 1703 writel(0, host->base + MSDC_IOCON); 1704 sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0); 1705 writel(0x403c0046, host->base + MSDC_PATCH_BIT); 1706 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1); 1707 writel(0xffff4089, host->base + MSDC_PATCH_BIT1); 1708 sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL); 1709 1710 if (host->dev_comp->stop_clk_fix) { 1711 sdr_set_field(host->base + MSDC_PATCH_BIT1, 1712 MSDC_PATCH_BIT1_STOP_DLY, 3); 1713 sdr_clr_bits(host->base + SDC_FIFO_CFG, 1714 SDC_FIFO_CFG_WRVALIDSEL); 1715 sdr_clr_bits(host->base + SDC_FIFO_CFG, 1716 SDC_FIFO_CFG_RDVALIDSEL); 1717 } 1718 1719 if (host->dev_comp->busy_check) 1720 sdr_clr_bits(host->base + MSDC_PATCH_BIT1, BIT(7)); 1721 1722 if (host->dev_comp->async_fifo) { 1723 sdr_set_field(host->base + MSDC_PATCH_BIT2, 1724 MSDC_PB2_RESPWAIT, 3); 1725 if (host->dev_comp->enhance_rx) { 1726 if (host->top_base) 1727 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL, 1728 SDC_RX_ENH_EN); 1729 else 1730 sdr_set_bits(host->base + SDC_ADV_CFG0, 1731 SDC_RX_ENHANCE_EN); 1732 } else { 1733 sdr_set_field(host->base + MSDC_PATCH_BIT2, 1734 MSDC_PB2_RESPSTSENSEL, 2); 1735 sdr_set_field(host->base + MSDC_PATCH_BIT2, 1736 MSDC_PB2_CRCSTSENSEL, 2); 1737 } 1738 /* use async fifo, then no need tune internal delay */ 1739 sdr_clr_bits(host->base + MSDC_PATCH_BIT2, 1740 MSDC_PATCH_BIT2_CFGRESP); 1741 sdr_set_bits(host->base + MSDC_PATCH_BIT2, 1742 MSDC_PATCH_BIT2_CFGCRCSTS); 1743 } 1744 1745 if (host->dev_comp->support_64g) 1746 sdr_set_bits(host->base + MSDC_PATCH_BIT2, 1747 MSDC_PB2_SUPPORT_64G); 1748 if (host->dev_comp->data_tune) { 1749 if (host->top_base) { 1750 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL, 1751 PAD_DAT_RD_RXDLY_SEL); 1752 sdr_clr_bits(host->top_base + EMMC_TOP_CONTROL, 1753 DATA_K_VALUE_SEL); 1754 sdr_set_bits(host->top_base + EMMC_TOP_CMD, 1755 PAD_CMD_RD_RXDLY_SEL); 1756 } else { 1757 sdr_set_bits(host->base + tune_reg, 1758 MSDC_PAD_TUNE_RD_SEL | 1759 MSDC_PAD_TUNE_CMD_SEL); 1760 } 1761 } else { 1762 /* choose clock tune */ 1763 if (host->top_base) 1764 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL, 1765 PAD_RXDLY_SEL); 1766 else 1767 sdr_set_bits(host->base + tune_reg, 1768 MSDC_PAD_TUNE_RXDLYSEL); 1769 } 1770 1771 if (mmc->caps2 & MMC_CAP2_NO_SDIO) { 1772 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIO); 1773 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ); 1774 sdr_clr_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER); 1775 } else { 1776 /* Configure to enable SDIO mode, otherwise SDIO CMD5 fails */ 1777 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO); 1778 1779 /* Config SDIO device detect interrupt function */ 1780 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); 1781 sdr_set_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER); 1782 } 1783 1784 /* Configure to default data timeout */ 1785 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3); 1786 1787 host->def_tune_para.iocon = readl(host->base + MSDC_IOCON); 1788 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON); 1789 if (host->top_base) { 1790 host->def_tune_para.emmc_top_control = 1791 readl(host->top_base + EMMC_TOP_CONTROL); 1792 host->def_tune_para.emmc_top_cmd = 1793 readl(host->top_base + EMMC_TOP_CMD); 1794 host->saved_tune_para.emmc_top_control = 1795 readl(host->top_base + EMMC_TOP_CONTROL); 1796 host->saved_tune_para.emmc_top_cmd = 1797 readl(host->top_base + EMMC_TOP_CMD); 1798 } else { 1799 host->def_tune_para.pad_tune = readl(host->base + tune_reg); 1800 host->saved_tune_para.pad_tune = readl(host->base + tune_reg); 1801 } 1802 dev_dbg(host->dev, "init hardware done!"); 1803 } 1804 1805 static void msdc_deinit_hw(struct msdc_host *host) 1806 { 1807 u32 val; 1808 1809 if (host->internal_cd) { 1810 /* Disabled card-detect */ 1811 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN); 1812 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP); 1813 } 1814 1815 /* Disable and clear all interrupts */ 1816 writel(0, host->base + MSDC_INTEN); 1817 1818 val = readl(host->base + MSDC_INT); 1819 writel(val, host->base + MSDC_INT); 1820 } 1821 1822 /* init gpd and bd list in msdc_drv_probe */ 1823 static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma) 1824 { 1825 struct mt_gpdma_desc *gpd = dma->gpd; 1826 struct mt_bdma_desc *bd = dma->bd; 1827 dma_addr_t dma_addr; 1828 int i; 1829 1830 memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2); 1831 1832 dma_addr = dma->gpd_addr + sizeof(struct mt_gpdma_desc); 1833 gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */ 1834 /* gpd->next is must set for desc DMA 1835 * That's why must alloc 2 gpd structure. 1836 */ 1837 gpd->next = lower_32_bits(dma_addr); 1838 if (host->dev_comp->support_64g) 1839 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 24; 1840 1841 dma_addr = dma->bd_addr; 1842 gpd->ptr = lower_32_bits(dma->bd_addr); /* physical address */ 1843 if (host->dev_comp->support_64g) 1844 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 28; 1845 1846 memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM); 1847 for (i = 0; i < (MAX_BD_NUM - 1); i++) { 1848 dma_addr = dma->bd_addr + sizeof(*bd) * (i + 1); 1849 bd[i].next = lower_32_bits(dma_addr); 1850 if (host->dev_comp->support_64g) 1851 bd[i].bd_info |= (upper_32_bits(dma_addr) & 0xf) << 24; 1852 } 1853 } 1854 1855 static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 1856 { 1857 struct msdc_host *host = mmc_priv(mmc); 1858 int ret; 1859 1860 msdc_set_buswidth(host, ios->bus_width); 1861 1862 /* Suspend/Resume will do power off/on */ 1863 switch (ios->power_mode) { 1864 case MMC_POWER_UP: 1865 if (!IS_ERR(mmc->supply.vmmc)) { 1866 msdc_init_hw(host); 1867 ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 1868 ios->vdd); 1869 if (ret) { 1870 dev_err(host->dev, "Failed to set vmmc power!\n"); 1871 return; 1872 } 1873 } 1874 break; 1875 case MMC_POWER_ON: 1876 if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) { 1877 ret = regulator_enable(mmc->supply.vqmmc); 1878 if (ret) 1879 dev_err(host->dev, "Failed to set vqmmc power!\n"); 1880 else 1881 host->vqmmc_enabled = true; 1882 } 1883 break; 1884 case MMC_POWER_OFF: 1885 if (!IS_ERR(mmc->supply.vmmc)) 1886 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); 1887 1888 if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) { 1889 regulator_disable(mmc->supply.vqmmc); 1890 host->vqmmc_enabled = false; 1891 } 1892 break; 1893 default: 1894 break; 1895 } 1896 1897 if (host->mclk != ios->clock || host->timing != ios->timing) 1898 msdc_set_mclk(host, ios->timing, ios->clock); 1899 } 1900 1901 static u32 test_delay_bit(u32 delay, u32 bit) 1902 { 1903 bit %= PAD_DELAY_MAX; 1904 return delay & BIT(bit); 1905 } 1906 1907 static int get_delay_len(u32 delay, u32 start_bit) 1908 { 1909 int i; 1910 1911 for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) { 1912 if (test_delay_bit(delay, start_bit + i) == 0) 1913 return i; 1914 } 1915 return PAD_DELAY_MAX - start_bit; 1916 } 1917 1918 static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay) 1919 { 1920 int start = 0, len = 0; 1921 int start_final = 0, len_final = 0; 1922 u8 final_phase = 0xff; 1923 struct msdc_delay_phase delay_phase = { 0, }; 1924 1925 if (delay == 0) { 1926 dev_err(host->dev, "phase error: [map:%x]\n", delay); 1927 delay_phase.final_phase = final_phase; 1928 return delay_phase; 1929 } 1930 1931 while (start < PAD_DELAY_MAX) { 1932 len = get_delay_len(delay, start); 1933 if (len_final < len) { 1934 start_final = start; 1935 len_final = len; 1936 } 1937 start += len ? len : 1; 1938 if (len >= 12 && start_final < 4) 1939 break; 1940 } 1941 1942 /* The rule is that to find the smallest delay cell */ 1943 if (start_final == 0) 1944 final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX; 1945 else 1946 final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX; 1947 dev_dbg(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n", 1948 delay, len_final, final_phase); 1949 1950 delay_phase.maxlen = len_final; 1951 delay_phase.start = start_final; 1952 delay_phase.final_phase = final_phase; 1953 return delay_phase; 1954 } 1955 1956 static inline void msdc_set_cmd_delay(struct msdc_host *host, u32 value) 1957 { 1958 u32 tune_reg = host->dev_comp->pad_tune_reg; 1959 1960 if (host->top_base) 1961 sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY, 1962 value); 1963 else 1964 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY, 1965 value); 1966 } 1967 1968 static inline void msdc_set_data_delay(struct msdc_host *host, u32 value) 1969 { 1970 u32 tune_reg = host->dev_comp->pad_tune_reg; 1971 1972 if (host->top_base) 1973 sdr_set_field(host->top_base + EMMC_TOP_CONTROL, 1974 PAD_DAT_RD_RXDLY, value); 1975 else 1976 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY, 1977 value); 1978 } 1979 1980 static int msdc_tune_response(struct mmc_host *mmc, u32 opcode) 1981 { 1982 struct msdc_host *host = mmc_priv(mmc); 1983 u32 rise_delay = 0, fall_delay = 0; 1984 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; 1985 struct msdc_delay_phase internal_delay_phase; 1986 u8 final_delay, final_maxlen; 1987 u32 internal_delay = 0; 1988 u32 tune_reg = host->dev_comp->pad_tune_reg; 1989 int cmd_err; 1990 int i, j; 1991 1992 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 || 1993 mmc->ios.timing == MMC_TIMING_UHS_SDR104) 1994 sdr_set_field(host->base + tune_reg, 1995 MSDC_PAD_TUNE_CMDRRDLY, 1996 host->hs200_cmd_int_delay); 1997 1998 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 1999 for (i = 0 ; i < PAD_DELAY_MAX; i++) { 2000 msdc_set_cmd_delay(host, i); 2001 /* 2002 * Using the same parameters, it may sometimes pass the test, 2003 * but sometimes it may fail. To make sure the parameters are 2004 * more stable, we test each set of parameters 3 times. 2005 */ 2006 for (j = 0; j < 3; j++) { 2007 mmc_send_tuning(mmc, opcode, &cmd_err); 2008 if (!cmd_err) { 2009 rise_delay |= BIT(i); 2010 } else { 2011 rise_delay &= ~BIT(i); 2012 break; 2013 } 2014 } 2015 } 2016 final_rise_delay = get_best_delay(host, rise_delay); 2017 /* if rising edge has enough margin, then do not scan falling edge */ 2018 if (final_rise_delay.maxlen >= 12 || 2019 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4)) 2020 goto skip_fall; 2021 2022 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 2023 for (i = 0; i < PAD_DELAY_MAX; i++) { 2024 msdc_set_cmd_delay(host, i); 2025 /* 2026 * Using the same parameters, it may sometimes pass the test, 2027 * but sometimes it may fail. To make sure the parameters are 2028 * more stable, we test each set of parameters 3 times. 2029 */ 2030 for (j = 0; j < 3; j++) { 2031 mmc_send_tuning(mmc, opcode, &cmd_err); 2032 if (!cmd_err) { 2033 fall_delay |= BIT(i); 2034 } else { 2035 fall_delay &= ~BIT(i); 2036 break; 2037 } 2038 } 2039 } 2040 final_fall_delay = get_best_delay(host, fall_delay); 2041 2042 skip_fall: 2043 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen); 2044 if (final_fall_delay.maxlen >= 12 && final_fall_delay.start < 4) 2045 final_maxlen = final_fall_delay.maxlen; 2046 if (final_maxlen == final_rise_delay.maxlen) { 2047 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 2048 final_delay = final_rise_delay.final_phase; 2049 } else { 2050 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 2051 final_delay = final_fall_delay.final_phase; 2052 } 2053 msdc_set_cmd_delay(host, final_delay); 2054 2055 if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay) 2056 goto skip_internal; 2057 2058 for (i = 0; i < PAD_DELAY_MAX; i++) { 2059 sdr_set_field(host->base + tune_reg, 2060 MSDC_PAD_TUNE_CMDRRDLY, i); 2061 mmc_send_tuning(mmc, opcode, &cmd_err); 2062 if (!cmd_err) 2063 internal_delay |= BIT(i); 2064 } 2065 dev_dbg(host->dev, "Final internal delay: 0x%x\n", internal_delay); 2066 internal_delay_phase = get_best_delay(host, internal_delay); 2067 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY, 2068 internal_delay_phase.final_phase); 2069 skip_internal: 2070 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay); 2071 return final_delay == 0xff ? -EIO : 0; 2072 } 2073 2074 static int hs400_tune_response(struct mmc_host *mmc, u32 opcode) 2075 { 2076 struct msdc_host *host = mmc_priv(mmc); 2077 u32 cmd_delay = 0; 2078 struct msdc_delay_phase final_cmd_delay = { 0,}; 2079 u8 final_delay; 2080 int cmd_err; 2081 int i, j; 2082 2083 /* select EMMC50 PAD CMD tune */ 2084 sdr_set_bits(host->base + PAD_CMD_TUNE, BIT(0)); 2085 sdr_set_field(host->base + MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_CMDTA, 2); 2086 2087 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 || 2088 mmc->ios.timing == MMC_TIMING_UHS_SDR104) 2089 sdr_set_field(host->base + MSDC_PAD_TUNE, 2090 MSDC_PAD_TUNE_CMDRRDLY, 2091 host->hs200_cmd_int_delay); 2092 2093 if (host->hs400_cmd_resp_sel_rising) 2094 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 2095 else 2096 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 2097 for (i = 0 ; i < PAD_DELAY_MAX; i++) { 2098 sdr_set_field(host->base + PAD_CMD_TUNE, 2099 PAD_CMD_TUNE_RX_DLY3, i); 2100 /* 2101 * Using the same parameters, it may sometimes pass the test, 2102 * but sometimes it may fail. To make sure the parameters are 2103 * more stable, we test each set of parameters 3 times. 2104 */ 2105 for (j = 0; j < 3; j++) { 2106 mmc_send_tuning(mmc, opcode, &cmd_err); 2107 if (!cmd_err) { 2108 cmd_delay |= BIT(i); 2109 } else { 2110 cmd_delay &= ~BIT(i); 2111 break; 2112 } 2113 } 2114 } 2115 final_cmd_delay = get_best_delay(host, cmd_delay); 2116 sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3, 2117 final_cmd_delay.final_phase); 2118 final_delay = final_cmd_delay.final_phase; 2119 2120 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay); 2121 return final_delay == 0xff ? -EIO : 0; 2122 } 2123 2124 static int msdc_tune_data(struct mmc_host *mmc, u32 opcode) 2125 { 2126 struct msdc_host *host = mmc_priv(mmc); 2127 u32 rise_delay = 0, fall_delay = 0; 2128 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; 2129 u8 final_delay, final_maxlen; 2130 int i, ret; 2131 2132 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL, 2133 host->latch_ck); 2134 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); 2135 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); 2136 for (i = 0 ; i < PAD_DELAY_MAX; i++) { 2137 msdc_set_data_delay(host, i); 2138 ret = mmc_send_tuning(mmc, opcode, NULL); 2139 if (!ret) 2140 rise_delay |= BIT(i); 2141 } 2142 final_rise_delay = get_best_delay(host, rise_delay); 2143 /* if rising edge has enough margin, then do not scan falling edge */ 2144 if (final_rise_delay.maxlen >= 12 || 2145 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4)) 2146 goto skip_fall; 2147 2148 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); 2149 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); 2150 for (i = 0; i < PAD_DELAY_MAX; i++) { 2151 msdc_set_data_delay(host, i); 2152 ret = mmc_send_tuning(mmc, opcode, NULL); 2153 if (!ret) 2154 fall_delay |= BIT(i); 2155 } 2156 final_fall_delay = get_best_delay(host, fall_delay); 2157 2158 skip_fall: 2159 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen); 2160 if (final_maxlen == final_rise_delay.maxlen) { 2161 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); 2162 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); 2163 final_delay = final_rise_delay.final_phase; 2164 } else { 2165 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); 2166 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); 2167 final_delay = final_fall_delay.final_phase; 2168 } 2169 msdc_set_data_delay(host, final_delay); 2170 2171 dev_dbg(host->dev, "Final data pad delay: %x\n", final_delay); 2172 return final_delay == 0xff ? -EIO : 0; 2173 } 2174 2175 /* 2176 * MSDC IP which supports data tune + async fifo can do CMD/DAT tune 2177 * together, which can save the tuning time. 2178 */ 2179 static int msdc_tune_together(struct mmc_host *mmc, u32 opcode) 2180 { 2181 struct msdc_host *host = mmc_priv(mmc); 2182 u32 rise_delay = 0, fall_delay = 0; 2183 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; 2184 u8 final_delay, final_maxlen; 2185 int i, ret; 2186 2187 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL, 2188 host->latch_ck); 2189 2190 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 2191 sdr_clr_bits(host->base + MSDC_IOCON, 2192 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); 2193 for (i = 0 ; i < PAD_DELAY_MAX; i++) { 2194 msdc_set_cmd_delay(host, i); 2195 msdc_set_data_delay(host, i); 2196 ret = mmc_send_tuning(mmc, opcode, NULL); 2197 if (!ret) 2198 rise_delay |= BIT(i); 2199 } 2200 final_rise_delay = get_best_delay(host, rise_delay); 2201 /* if rising edge has enough margin, then do not scan falling edge */ 2202 if (final_rise_delay.maxlen >= 12 || 2203 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4)) 2204 goto skip_fall; 2205 2206 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 2207 sdr_set_bits(host->base + MSDC_IOCON, 2208 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); 2209 for (i = 0; i < PAD_DELAY_MAX; i++) { 2210 msdc_set_cmd_delay(host, i); 2211 msdc_set_data_delay(host, i); 2212 ret = mmc_send_tuning(mmc, opcode, NULL); 2213 if (!ret) 2214 fall_delay |= BIT(i); 2215 } 2216 final_fall_delay = get_best_delay(host, fall_delay); 2217 2218 skip_fall: 2219 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen); 2220 if (final_maxlen == final_rise_delay.maxlen) { 2221 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 2222 sdr_clr_bits(host->base + MSDC_IOCON, 2223 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); 2224 final_delay = final_rise_delay.final_phase; 2225 } else { 2226 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); 2227 sdr_set_bits(host->base + MSDC_IOCON, 2228 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); 2229 final_delay = final_fall_delay.final_phase; 2230 } 2231 2232 msdc_set_cmd_delay(host, final_delay); 2233 msdc_set_data_delay(host, final_delay); 2234 2235 dev_dbg(host->dev, "Final pad delay: %x\n", final_delay); 2236 return final_delay == 0xff ? -EIO : 0; 2237 } 2238 2239 static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode) 2240 { 2241 struct msdc_host *host = mmc_priv(mmc); 2242 int ret; 2243 u32 tune_reg = host->dev_comp->pad_tune_reg; 2244 2245 if (host->dev_comp->data_tune && host->dev_comp->async_fifo) { 2246 ret = msdc_tune_together(mmc, opcode); 2247 if (host->hs400_mode) { 2248 sdr_clr_bits(host->base + MSDC_IOCON, 2249 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); 2250 msdc_set_data_delay(host, 0); 2251 } 2252 goto tune_done; 2253 } 2254 if (host->hs400_mode && 2255 host->dev_comp->hs400_tune) 2256 ret = hs400_tune_response(mmc, opcode); 2257 else 2258 ret = msdc_tune_response(mmc, opcode); 2259 if (ret == -EIO) { 2260 dev_err(host->dev, "Tune response fail!\n"); 2261 return ret; 2262 } 2263 if (host->hs400_mode == false) { 2264 ret = msdc_tune_data(mmc, opcode); 2265 if (ret == -EIO) 2266 dev_err(host->dev, "Tune data fail!\n"); 2267 } 2268 2269 tune_done: 2270 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON); 2271 host->saved_tune_para.pad_tune = readl(host->base + tune_reg); 2272 host->saved_tune_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE); 2273 if (host->top_base) { 2274 host->saved_tune_para.emmc_top_control = readl(host->top_base + 2275 EMMC_TOP_CONTROL); 2276 host->saved_tune_para.emmc_top_cmd = readl(host->top_base + 2277 EMMC_TOP_CMD); 2278 } 2279 return ret; 2280 } 2281 2282 static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios) 2283 { 2284 struct msdc_host *host = mmc_priv(mmc); 2285 host->hs400_mode = true; 2286 2287 if (host->top_base) 2288 writel(host->hs400_ds_delay, 2289 host->top_base + EMMC50_PAD_DS_TUNE); 2290 else 2291 writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE); 2292 /* hs400 mode must set it to 0 */ 2293 sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS); 2294 /* to improve read performance, set outstanding to 2 */ 2295 sdr_set_field(host->base + EMMC50_CFG3, EMMC50_CFG3_OUTS_WR, 2); 2296 2297 return 0; 2298 } 2299 2300 static int msdc_execute_hs400_tuning(struct mmc_host *mmc, struct mmc_card *card) 2301 { 2302 struct msdc_host *host = mmc_priv(mmc); 2303 struct msdc_delay_phase dly1_delay; 2304 u32 val, result_dly1 = 0; 2305 u8 *ext_csd; 2306 int i, ret; 2307 2308 if (host->top_base) { 2309 sdr_set_bits(host->top_base + EMMC50_PAD_DS_TUNE, 2310 PAD_DS_DLY_SEL); 2311 if (host->hs400_ds_dly3) 2312 sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE, 2313 PAD_DS_DLY3, host->hs400_ds_dly3); 2314 } else { 2315 sdr_set_bits(host->base + PAD_DS_TUNE, PAD_DS_TUNE_DLY_SEL); 2316 if (host->hs400_ds_dly3) 2317 sdr_set_field(host->base + PAD_DS_TUNE, 2318 PAD_DS_TUNE_DLY3, host->hs400_ds_dly3); 2319 } 2320 2321 host->hs400_tuning = true; 2322 for (i = 0; i < PAD_DELAY_MAX; i++) { 2323 if (host->top_base) 2324 sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE, 2325 PAD_DS_DLY1, i); 2326 else 2327 sdr_set_field(host->base + PAD_DS_TUNE, 2328 PAD_DS_TUNE_DLY1, i); 2329 ret = mmc_get_ext_csd(card, &ext_csd); 2330 if (!ret) { 2331 result_dly1 |= BIT(i); 2332 kfree(ext_csd); 2333 } 2334 } 2335 host->hs400_tuning = false; 2336 2337 dly1_delay = get_best_delay(host, result_dly1); 2338 if (dly1_delay.maxlen == 0) { 2339 dev_err(host->dev, "Failed to get DLY1 delay!\n"); 2340 goto fail; 2341 } 2342 if (host->top_base) 2343 sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE, 2344 PAD_DS_DLY1, dly1_delay.final_phase); 2345 else 2346 sdr_set_field(host->base + PAD_DS_TUNE, 2347 PAD_DS_TUNE_DLY1, dly1_delay.final_phase); 2348 2349 if (host->top_base) 2350 val = readl(host->top_base + EMMC50_PAD_DS_TUNE); 2351 else 2352 val = readl(host->base + PAD_DS_TUNE); 2353 2354 dev_info(host->dev, "Final PAD_DS_TUNE: 0x%x\n", val); 2355 2356 return 0; 2357 2358 fail: 2359 dev_err(host->dev, "Failed to tuning DS pin delay!\n"); 2360 return -EIO; 2361 } 2362 2363 static void msdc_hw_reset(struct mmc_host *mmc) 2364 { 2365 struct msdc_host *host = mmc_priv(mmc); 2366 2367 sdr_set_bits(host->base + EMMC_IOCON, 1); 2368 udelay(10); /* 10us is enough */ 2369 sdr_clr_bits(host->base + EMMC_IOCON, 1); 2370 } 2371 2372 static void msdc_ack_sdio_irq(struct mmc_host *mmc) 2373 { 2374 unsigned long flags; 2375 struct msdc_host *host = mmc_priv(mmc); 2376 2377 spin_lock_irqsave(&host->lock, flags); 2378 __msdc_enable_sdio_irq(host, 1); 2379 spin_unlock_irqrestore(&host->lock, flags); 2380 } 2381 2382 static int msdc_get_cd(struct mmc_host *mmc) 2383 { 2384 struct msdc_host *host = mmc_priv(mmc); 2385 int val; 2386 2387 if (mmc->caps & MMC_CAP_NONREMOVABLE) 2388 return 1; 2389 2390 if (!host->internal_cd) 2391 return mmc_gpio_get_cd(mmc); 2392 2393 val = readl(host->base + MSDC_PS) & MSDC_PS_CDSTS; 2394 if (mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH) 2395 return !!val; 2396 else 2397 return !val; 2398 } 2399 2400 static void msdc_hs400_enhanced_strobe(struct mmc_host *mmc, 2401 struct mmc_ios *ios) 2402 { 2403 struct msdc_host *host = mmc_priv(mmc); 2404 2405 if (ios->enhanced_strobe) { 2406 msdc_prepare_hs400_tuning(mmc, ios); 2407 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_PADCMD_LATCHCK, 1); 2408 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_CMD_RESP_SEL, 1); 2409 sdr_set_field(host->base + EMMC50_CFG1, EMMC50_CFG1_DS_CFG, 1); 2410 2411 sdr_clr_bits(host->base + CQHCI_SETTING, CQHCI_RD_CMD_WND_SEL); 2412 sdr_clr_bits(host->base + CQHCI_SETTING, CQHCI_WR_CMD_WND_SEL); 2413 sdr_clr_bits(host->base + EMMC51_CFG0, CMDQ_RDAT_CNT); 2414 } else { 2415 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_PADCMD_LATCHCK, 0); 2416 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_CMD_RESP_SEL, 0); 2417 sdr_set_field(host->base + EMMC50_CFG1, EMMC50_CFG1_DS_CFG, 0); 2418 2419 sdr_set_bits(host->base + CQHCI_SETTING, CQHCI_RD_CMD_WND_SEL); 2420 sdr_set_bits(host->base + CQHCI_SETTING, CQHCI_WR_CMD_WND_SEL); 2421 sdr_set_field(host->base + EMMC51_CFG0, CMDQ_RDAT_CNT, 0xb4); 2422 } 2423 } 2424 2425 static void msdc_cqe_enable(struct mmc_host *mmc) 2426 { 2427 struct msdc_host *host = mmc_priv(mmc); 2428 2429 /* enable cmdq irq */ 2430 writel(MSDC_INT_CMDQ, host->base + MSDC_INTEN); 2431 /* enable busy check */ 2432 sdr_set_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL); 2433 /* default write data / busy timeout 20s */ 2434 msdc_set_busy_timeout(host, 20 * 1000000000ULL, 0); 2435 /* default read data timeout 1s */ 2436 msdc_set_timeout(host, 1000000000ULL, 0); 2437 } 2438 2439 static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery) 2440 { 2441 struct msdc_host *host = mmc_priv(mmc); 2442 unsigned int val = 0; 2443 2444 /* disable cmdq irq */ 2445 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INT_CMDQ); 2446 /* disable busy check */ 2447 sdr_clr_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL); 2448 2449 val = readl(host->base + MSDC_INT); 2450 writel(val, host->base + MSDC_INT); 2451 2452 if (recovery) { 2453 sdr_set_field(host->base + MSDC_DMA_CTRL, 2454 MSDC_DMA_CTRL_STOP, 1); 2455 if (WARN_ON(readl_poll_timeout(host->base + MSDC_DMA_CTRL, val, 2456 !(val & MSDC_DMA_CTRL_STOP), 1, 3000))) 2457 return; 2458 if (WARN_ON(readl_poll_timeout(host->base + MSDC_DMA_CFG, val, 2459 !(val & MSDC_DMA_CFG_STS), 1, 3000))) 2460 return; 2461 msdc_reset_hw(host); 2462 } 2463 } 2464 2465 static void msdc_cqe_pre_enable(struct mmc_host *mmc) 2466 { 2467 struct cqhci_host *cq_host = mmc->cqe_private; 2468 u32 reg; 2469 2470 reg = cqhci_readl(cq_host, CQHCI_CFG); 2471 reg |= CQHCI_ENABLE; 2472 cqhci_writel(cq_host, reg, CQHCI_CFG); 2473 } 2474 2475 static void msdc_cqe_post_disable(struct mmc_host *mmc) 2476 { 2477 struct cqhci_host *cq_host = mmc->cqe_private; 2478 u32 reg; 2479 2480 reg = cqhci_readl(cq_host, CQHCI_CFG); 2481 reg &= ~CQHCI_ENABLE; 2482 cqhci_writel(cq_host, reg, CQHCI_CFG); 2483 } 2484 2485 static const struct mmc_host_ops mt_msdc_ops = { 2486 .post_req = msdc_post_req, 2487 .pre_req = msdc_pre_req, 2488 .request = msdc_ops_request, 2489 .set_ios = msdc_ops_set_ios, 2490 .get_ro = mmc_gpio_get_ro, 2491 .get_cd = msdc_get_cd, 2492 .hs400_enhanced_strobe = msdc_hs400_enhanced_strobe, 2493 .enable_sdio_irq = msdc_enable_sdio_irq, 2494 .ack_sdio_irq = msdc_ack_sdio_irq, 2495 .start_signal_voltage_switch = msdc_ops_switch_volt, 2496 .card_busy = msdc_card_busy, 2497 .execute_tuning = msdc_execute_tuning, 2498 .prepare_hs400_tuning = msdc_prepare_hs400_tuning, 2499 .execute_hs400_tuning = msdc_execute_hs400_tuning, 2500 .card_hw_reset = msdc_hw_reset, 2501 }; 2502 2503 static const struct cqhci_host_ops msdc_cmdq_ops = { 2504 .enable = msdc_cqe_enable, 2505 .disable = msdc_cqe_disable, 2506 .pre_enable = msdc_cqe_pre_enable, 2507 .post_disable = msdc_cqe_post_disable, 2508 }; 2509 2510 static void msdc_of_property_parse(struct platform_device *pdev, 2511 struct msdc_host *host) 2512 { 2513 of_property_read_u32(pdev->dev.of_node, "mediatek,latch-ck", 2514 &host->latch_ck); 2515 2516 of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay", 2517 &host->hs400_ds_delay); 2518 2519 of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-ds-dly3", 2520 &host->hs400_ds_dly3); 2521 2522 of_property_read_u32(pdev->dev.of_node, "mediatek,hs200-cmd-int-delay", 2523 &host->hs200_cmd_int_delay); 2524 2525 of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-cmd-int-delay", 2526 &host->hs400_cmd_int_delay); 2527 2528 if (of_property_read_bool(pdev->dev.of_node, 2529 "mediatek,hs400-cmd-resp-sel-rising")) 2530 host->hs400_cmd_resp_sel_rising = true; 2531 else 2532 host->hs400_cmd_resp_sel_rising = false; 2533 2534 if (of_property_read_bool(pdev->dev.of_node, 2535 "supports-cqe")) 2536 host->cqhci = true; 2537 else 2538 host->cqhci = false; 2539 } 2540 2541 static int msdc_of_clock_parse(struct platform_device *pdev, 2542 struct msdc_host *host) 2543 { 2544 int ret; 2545 2546 host->src_clk = devm_clk_get(&pdev->dev, "source"); 2547 if (IS_ERR(host->src_clk)) 2548 return PTR_ERR(host->src_clk); 2549 2550 host->h_clk = devm_clk_get(&pdev->dev, "hclk"); 2551 if (IS_ERR(host->h_clk)) 2552 return PTR_ERR(host->h_clk); 2553 2554 host->bus_clk = devm_clk_get_optional(&pdev->dev, "bus_clk"); 2555 if (IS_ERR(host->bus_clk)) 2556 host->bus_clk = NULL; 2557 2558 /*source clock control gate is optional clock*/ 2559 host->src_clk_cg = devm_clk_get_optional(&pdev->dev, "source_cg"); 2560 if (IS_ERR(host->src_clk_cg)) 2561 return PTR_ERR(host->src_clk_cg); 2562 2563 /* 2564 * Fallback for legacy device-trees: src_clk and HCLK use the same 2565 * bit to control gating but they are parented to a different mux, 2566 * hence if our intention is to gate only the source, required 2567 * during a clk mode switch to avoid hw hangs, we need to gate 2568 * its parent (specified as a different clock only on new DTs). 2569 */ 2570 if (!host->src_clk_cg) { 2571 host->src_clk_cg = clk_get_parent(host->src_clk); 2572 if (IS_ERR(host->src_clk_cg)) 2573 return PTR_ERR(host->src_clk_cg); 2574 } 2575 2576 host->sys_clk_cg = devm_clk_get_optional(&pdev->dev, "sys_cg"); 2577 if (IS_ERR(host->sys_clk_cg)) 2578 host->sys_clk_cg = NULL; 2579 2580 /* If present, always enable for this clock gate */ 2581 clk_prepare_enable(host->sys_clk_cg); 2582 2583 host->bulk_clks[0].id = "pclk_cg"; 2584 host->bulk_clks[1].id = "axi_cg"; 2585 host->bulk_clks[2].id = "ahb_cg"; 2586 ret = devm_clk_bulk_get_optional(&pdev->dev, MSDC_NR_CLOCKS, 2587 host->bulk_clks); 2588 if (ret) { 2589 dev_err(&pdev->dev, "Cannot get pclk/axi/ahb clock gates\n"); 2590 return ret; 2591 } 2592 2593 return 0; 2594 } 2595 2596 static int msdc_drv_probe(struct platform_device *pdev) 2597 { 2598 struct mmc_host *mmc; 2599 struct msdc_host *host; 2600 struct resource *res; 2601 int ret; 2602 2603 if (!pdev->dev.of_node) { 2604 dev_err(&pdev->dev, "No DT found\n"); 2605 return -EINVAL; 2606 } 2607 2608 /* Allocate MMC host for this device */ 2609 mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev); 2610 if (!mmc) 2611 return -ENOMEM; 2612 2613 host = mmc_priv(mmc); 2614 ret = mmc_of_parse(mmc); 2615 if (ret) 2616 goto host_free; 2617 2618 host->base = devm_platform_ioremap_resource(pdev, 0); 2619 if (IS_ERR(host->base)) { 2620 ret = PTR_ERR(host->base); 2621 goto host_free; 2622 } 2623 2624 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 2625 if (res) { 2626 host->top_base = devm_ioremap_resource(&pdev->dev, res); 2627 if (IS_ERR(host->top_base)) 2628 host->top_base = NULL; 2629 } 2630 2631 ret = mmc_regulator_get_supply(mmc); 2632 if (ret) 2633 goto host_free; 2634 2635 ret = msdc_of_clock_parse(pdev, host); 2636 if (ret) 2637 goto host_free; 2638 2639 host->reset = devm_reset_control_get_optional_exclusive(&pdev->dev, 2640 "hrst"); 2641 if (IS_ERR(host->reset)) { 2642 ret = PTR_ERR(host->reset); 2643 goto host_free; 2644 } 2645 2646 host->irq = platform_get_irq(pdev, 0); 2647 if (host->irq < 0) { 2648 ret = -EINVAL; 2649 goto host_free; 2650 } 2651 2652 host->pinctrl = devm_pinctrl_get(&pdev->dev); 2653 if (IS_ERR(host->pinctrl)) { 2654 ret = PTR_ERR(host->pinctrl); 2655 dev_err(&pdev->dev, "Cannot find pinctrl!\n"); 2656 goto host_free; 2657 } 2658 2659 host->pins_default = pinctrl_lookup_state(host->pinctrl, "default"); 2660 if (IS_ERR(host->pins_default)) { 2661 ret = PTR_ERR(host->pins_default); 2662 dev_err(&pdev->dev, "Cannot find pinctrl default!\n"); 2663 goto host_free; 2664 } 2665 2666 host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs"); 2667 if (IS_ERR(host->pins_uhs)) { 2668 ret = PTR_ERR(host->pins_uhs); 2669 dev_err(&pdev->dev, "Cannot find pinctrl uhs!\n"); 2670 goto host_free; 2671 } 2672 2673 /* Support for SDIO eint irq ? */ 2674 if ((mmc->pm_caps & MMC_PM_WAKE_SDIO_IRQ) && (mmc->pm_caps & MMC_PM_KEEP_POWER)) { 2675 host->eint_irq = platform_get_irq_byname(pdev, "sdio_wakeup"); 2676 if (host->eint_irq > 0) { 2677 host->pins_eint = pinctrl_lookup_state(host->pinctrl, "state_eint"); 2678 if (IS_ERR(host->pins_eint)) { 2679 dev_err(&pdev->dev, "Cannot find pinctrl eint!\n"); 2680 host->pins_eint = NULL; 2681 } else { 2682 device_init_wakeup(&pdev->dev, true); 2683 } 2684 } 2685 } 2686 2687 msdc_of_property_parse(pdev, host); 2688 2689 host->dev = &pdev->dev; 2690 host->dev_comp = of_device_get_match_data(&pdev->dev); 2691 host->src_clk_freq = clk_get_rate(host->src_clk); 2692 /* Set host parameters to mmc */ 2693 mmc->ops = &mt_msdc_ops; 2694 if (host->dev_comp->clk_div_bits == 8) 2695 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 255); 2696 else 2697 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 4095); 2698 2699 if (!(mmc->caps & MMC_CAP_NONREMOVABLE) && 2700 !mmc_can_gpio_cd(mmc) && 2701 host->dev_comp->use_internal_cd) { 2702 /* 2703 * Is removable but no GPIO declared, so 2704 * use internal functionality. 2705 */ 2706 host->internal_cd = true; 2707 } 2708 2709 if (mmc->caps & MMC_CAP_SDIO_IRQ) 2710 mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD; 2711 2712 mmc->caps |= MMC_CAP_CMD23; 2713 if (host->cqhci) 2714 mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD; 2715 /* MMC core transfer sizes tunable parameters */ 2716 mmc->max_segs = MAX_BD_NUM; 2717 if (host->dev_comp->support_64g) 2718 mmc->max_seg_size = BDMA_DESC_BUFLEN_EXT; 2719 else 2720 mmc->max_seg_size = BDMA_DESC_BUFLEN; 2721 mmc->max_blk_size = 2048; 2722 mmc->max_req_size = 512 * 1024; 2723 mmc->max_blk_count = mmc->max_req_size / 512; 2724 if (host->dev_comp->support_64g) 2725 host->dma_mask = DMA_BIT_MASK(36); 2726 else 2727 host->dma_mask = DMA_BIT_MASK(32); 2728 mmc_dev(mmc)->dma_mask = &host->dma_mask; 2729 2730 host->timeout_clks = 3 * 1048576; 2731 host->dma.gpd = dma_alloc_coherent(&pdev->dev, 2732 2 * sizeof(struct mt_gpdma_desc), 2733 &host->dma.gpd_addr, GFP_KERNEL); 2734 host->dma.bd = dma_alloc_coherent(&pdev->dev, 2735 MAX_BD_NUM * sizeof(struct mt_bdma_desc), 2736 &host->dma.bd_addr, GFP_KERNEL); 2737 if (!host->dma.gpd || !host->dma.bd) { 2738 ret = -ENOMEM; 2739 goto release_mem; 2740 } 2741 msdc_init_gpd_bd(host, &host->dma); 2742 INIT_DELAYED_WORK(&host->req_timeout, msdc_request_timeout); 2743 spin_lock_init(&host->lock); 2744 2745 platform_set_drvdata(pdev, mmc); 2746 ret = msdc_ungate_clock(host); 2747 if (ret) { 2748 dev_err(&pdev->dev, "Cannot ungate clocks!\n"); 2749 goto release_mem; 2750 } 2751 msdc_init_hw(host); 2752 2753 if (mmc->caps2 & MMC_CAP2_CQE) { 2754 host->cq_host = devm_kzalloc(mmc->parent, 2755 sizeof(*host->cq_host), 2756 GFP_KERNEL); 2757 if (!host->cq_host) { 2758 ret = -ENOMEM; 2759 goto host_free; 2760 } 2761 host->cq_host->caps |= CQHCI_TASK_DESC_SZ_128; 2762 host->cq_host->mmio = host->base + 0x800; 2763 host->cq_host->ops = &msdc_cmdq_ops; 2764 ret = cqhci_init(host->cq_host, mmc, true); 2765 if (ret) 2766 goto host_free; 2767 mmc->max_segs = 128; 2768 /* cqhci 16bit length */ 2769 /* 0 size, means 65536 so we don't have to -1 here */ 2770 mmc->max_seg_size = 64 * 1024; 2771 } 2772 2773 ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq, 2774 IRQF_TRIGGER_NONE, pdev->name, host); 2775 if (ret) 2776 goto release; 2777 2778 pm_runtime_set_active(host->dev); 2779 pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY); 2780 pm_runtime_use_autosuspend(host->dev); 2781 pm_runtime_enable(host->dev); 2782 ret = mmc_add_host(mmc); 2783 2784 if (ret) 2785 goto end; 2786 2787 return 0; 2788 end: 2789 pm_runtime_disable(host->dev); 2790 release: 2791 platform_set_drvdata(pdev, NULL); 2792 msdc_deinit_hw(host); 2793 msdc_gate_clock(host); 2794 release_mem: 2795 if (host->dma.gpd) 2796 dma_free_coherent(&pdev->dev, 2797 2 * sizeof(struct mt_gpdma_desc), 2798 host->dma.gpd, host->dma.gpd_addr); 2799 if (host->dma.bd) 2800 dma_free_coherent(&pdev->dev, 2801 MAX_BD_NUM * sizeof(struct mt_bdma_desc), 2802 host->dma.bd, host->dma.bd_addr); 2803 host_free: 2804 mmc_free_host(mmc); 2805 2806 return ret; 2807 } 2808 2809 static int msdc_drv_remove(struct platform_device *pdev) 2810 { 2811 struct mmc_host *mmc; 2812 struct msdc_host *host; 2813 2814 mmc = platform_get_drvdata(pdev); 2815 host = mmc_priv(mmc); 2816 2817 pm_runtime_get_sync(host->dev); 2818 2819 platform_set_drvdata(pdev, NULL); 2820 mmc_remove_host(mmc); 2821 msdc_deinit_hw(host); 2822 msdc_gate_clock(host); 2823 2824 pm_runtime_disable(host->dev); 2825 pm_runtime_put_noidle(host->dev); 2826 dma_free_coherent(&pdev->dev, 2827 2 * sizeof(struct mt_gpdma_desc), 2828 host->dma.gpd, host->dma.gpd_addr); 2829 dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc), 2830 host->dma.bd, host->dma.bd_addr); 2831 2832 mmc_free_host(mmc); 2833 2834 return 0; 2835 } 2836 2837 static void msdc_save_reg(struct msdc_host *host) 2838 { 2839 u32 tune_reg = host->dev_comp->pad_tune_reg; 2840 2841 host->save_para.msdc_cfg = readl(host->base + MSDC_CFG); 2842 host->save_para.iocon = readl(host->base + MSDC_IOCON); 2843 host->save_para.sdc_cfg = readl(host->base + SDC_CFG); 2844 host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT); 2845 host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1); 2846 host->save_para.patch_bit2 = readl(host->base + MSDC_PATCH_BIT2); 2847 host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE); 2848 host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE); 2849 host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0); 2850 host->save_para.emmc50_cfg3 = readl(host->base + EMMC50_CFG3); 2851 host->save_para.sdc_fifo_cfg = readl(host->base + SDC_FIFO_CFG); 2852 if (host->top_base) { 2853 host->save_para.emmc_top_control = 2854 readl(host->top_base + EMMC_TOP_CONTROL); 2855 host->save_para.emmc_top_cmd = 2856 readl(host->top_base + EMMC_TOP_CMD); 2857 host->save_para.emmc50_pad_ds_tune = 2858 readl(host->top_base + EMMC50_PAD_DS_TUNE); 2859 } else { 2860 host->save_para.pad_tune = readl(host->base + tune_reg); 2861 } 2862 } 2863 2864 static void msdc_restore_reg(struct msdc_host *host) 2865 { 2866 struct mmc_host *mmc = mmc_from_priv(host); 2867 u32 tune_reg = host->dev_comp->pad_tune_reg; 2868 2869 writel(host->save_para.msdc_cfg, host->base + MSDC_CFG); 2870 writel(host->save_para.iocon, host->base + MSDC_IOCON); 2871 writel(host->save_para.sdc_cfg, host->base + SDC_CFG); 2872 writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT); 2873 writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1); 2874 writel(host->save_para.patch_bit2, host->base + MSDC_PATCH_BIT2); 2875 writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE); 2876 writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE); 2877 writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0); 2878 writel(host->save_para.emmc50_cfg3, host->base + EMMC50_CFG3); 2879 writel(host->save_para.sdc_fifo_cfg, host->base + SDC_FIFO_CFG); 2880 if (host->top_base) { 2881 writel(host->save_para.emmc_top_control, 2882 host->top_base + EMMC_TOP_CONTROL); 2883 writel(host->save_para.emmc_top_cmd, 2884 host->top_base + EMMC_TOP_CMD); 2885 writel(host->save_para.emmc50_pad_ds_tune, 2886 host->top_base + EMMC50_PAD_DS_TUNE); 2887 } else { 2888 writel(host->save_para.pad_tune, host->base + tune_reg); 2889 } 2890 2891 if (sdio_irq_claimed(mmc)) 2892 __msdc_enable_sdio_irq(host, 1); 2893 } 2894 2895 static int __maybe_unused msdc_runtime_suspend(struct device *dev) 2896 { 2897 struct mmc_host *mmc = dev_get_drvdata(dev); 2898 struct msdc_host *host = mmc_priv(mmc); 2899 2900 msdc_save_reg(host); 2901 2902 if (sdio_irq_claimed(mmc)) { 2903 if (host->pins_eint) { 2904 disable_irq(host->irq); 2905 pinctrl_select_state(host->pinctrl, host->pins_eint); 2906 } 2907 2908 __msdc_enable_sdio_irq(host, 0); 2909 } 2910 msdc_gate_clock(host); 2911 return 0; 2912 } 2913 2914 static int __maybe_unused msdc_runtime_resume(struct device *dev) 2915 { 2916 struct mmc_host *mmc = dev_get_drvdata(dev); 2917 struct msdc_host *host = mmc_priv(mmc); 2918 int ret; 2919 2920 ret = msdc_ungate_clock(host); 2921 if (ret) 2922 return ret; 2923 2924 msdc_restore_reg(host); 2925 2926 if (sdio_irq_claimed(mmc) && host->pins_eint) { 2927 pinctrl_select_state(host->pinctrl, host->pins_uhs); 2928 enable_irq(host->irq); 2929 } 2930 return 0; 2931 } 2932 2933 static int __maybe_unused msdc_suspend(struct device *dev) 2934 { 2935 struct mmc_host *mmc = dev_get_drvdata(dev); 2936 struct msdc_host *host = mmc_priv(mmc); 2937 int ret; 2938 u32 val; 2939 2940 if (mmc->caps2 & MMC_CAP2_CQE) { 2941 ret = cqhci_suspend(mmc); 2942 if (ret) 2943 return ret; 2944 val = readl(host->base + MSDC_INT); 2945 writel(val, host->base + MSDC_INT); 2946 } 2947 2948 /* 2949 * Bump up runtime PM usage counter otherwise dev->power.needs_force_resume will 2950 * not be marked as 1, pm_runtime_force_resume() will go out directly. 2951 */ 2952 if (sdio_irq_claimed(mmc) && host->pins_eint) 2953 pm_runtime_get_noresume(dev); 2954 2955 return pm_runtime_force_suspend(dev); 2956 } 2957 2958 static int __maybe_unused msdc_resume(struct device *dev) 2959 { 2960 struct mmc_host *mmc = dev_get_drvdata(dev); 2961 struct msdc_host *host = mmc_priv(mmc); 2962 2963 if (sdio_irq_claimed(mmc) && host->pins_eint) 2964 pm_runtime_put_noidle(dev); 2965 2966 return pm_runtime_force_resume(dev); 2967 } 2968 2969 static const struct dev_pm_ops msdc_dev_pm_ops = { 2970 SET_SYSTEM_SLEEP_PM_OPS(msdc_suspend, msdc_resume) 2971 SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL) 2972 }; 2973 2974 static struct platform_driver mt_msdc_driver = { 2975 .probe = msdc_drv_probe, 2976 .remove = msdc_drv_remove, 2977 .driver = { 2978 .name = "mtk-msdc", 2979 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 2980 .of_match_table = msdc_of_ids, 2981 .pm = &msdc_dev_pm_ops, 2982 }, 2983 }; 2984 2985 module_platform_driver(mt_msdc_driver); 2986 MODULE_LICENSE("GPL v2"); 2987 MODULE_DESCRIPTION("MediaTek SD/MMC Card Driver"); 2988