2 * Copyright (c) 2014-2015 MediaTek Inc.
3 * Author: Chaotian.Jing <chaotian.jing@mediatek.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #include <linux/module.h>
16 #include <linux/clk.h>
17 #include <linux/delay.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/ioport.h>
20 #include <linux/irq.h>
21 #include <linux/of_address.h>
22 #include <linux/of_device.h>
23 #include <linux/of_irq.h>
24 #include <linux/of_gpio.h>
25 #include <linux/pinctrl/consumer.h>
26 #include <linux/platform_device.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/regulator/consumer.h>
30 #include <linux/slab.h>
31 #include <linux/spinlock.h>
32 #include <linux/interrupt.h>
34 #include <linux/mmc/card.h>
35 #include <linux/mmc/core.h>
36 #include <linux/mmc/host.h>
37 #include <linux/mmc/mmc.h>
38 #include <linux/mmc/sd.h>
39 #include <linux/mmc/sdio.h>
40 #include <linux/mmc/slot-gpio.h>
42 #define MAX_BD_NUM 1024
44 /*--------------------------------------------------------------------------*/
45 /* Common Definition */
46 /*--------------------------------------------------------------------------*/
47 #define MSDC_BUS_1BITS 0x0
48 #define MSDC_BUS_4BITS 0x1
49 #define MSDC_BUS_8BITS 0x2
51 #define MSDC_BURST_64B 0x6
53 /*--------------------------------------------------------------------------*/
55 /*--------------------------------------------------------------------------*/
57 #define MSDC_IOCON 0x04
60 #define MSDC_INTEN 0x10
61 #define MSDC_FIFOCS 0x14
66 #define SDC_RESP0 0x40
67 #define SDC_RESP1 0x44
68 #define SDC_RESP2 0x48
69 #define SDC_RESP3 0x4c
70 #define SDC_BLK_NUM 0x50
71 #define SDC_ADV_CFG0 0x64
72 #define EMMC_IOCON 0x7c
73 #define SDC_ACMD_RESP 0x80
74 #define DMA_SA_H4BIT 0x8c
75 #define MSDC_DMA_SA 0x90
76 #define MSDC_DMA_CTRL 0x98
77 #define MSDC_DMA_CFG 0x9c
78 #define MSDC_PATCH_BIT 0xb0
79 #define MSDC_PATCH_BIT1 0xb4
80 #define MSDC_PATCH_BIT2 0xb8
81 #define MSDC_PAD_TUNE 0xec
82 #define MSDC_PAD_TUNE0 0xf0
83 #define PAD_DS_TUNE 0x188
84 #define PAD_CMD_TUNE 0x18c
85 #define EMMC50_CFG0 0x208
86 #define EMMC50_CFG3 0x220
87 #define SDC_FIFO_CFG 0x228
89 /*--------------------------------------------------------------------------*/
91 /*--------------------------------------------------------------------------*/
94 #define MSDC_CFG_MODE (0x1 << 0) /* RW */
95 #define MSDC_CFG_CKPDN (0x1 << 1) /* RW */
96 #define MSDC_CFG_RST (0x1 << 2) /* RW */
97 #define MSDC_CFG_PIO (0x1 << 3) /* RW */
98 #define MSDC_CFG_CKDRVEN (0x1 << 4) /* RW */
99 #define MSDC_CFG_BV18SDT (0x1 << 5) /* RW */
100 #define MSDC_CFG_BV18PSS (0x1 << 6) /* R */
101 #define MSDC_CFG_CKSTB (0x1 << 7) /* R */
102 #define MSDC_CFG_CKDIV (0xff << 8) /* RW */
103 #define MSDC_CFG_CKMOD (0x3 << 16) /* RW */
104 #define MSDC_CFG_HS400_CK_MODE (0x1 << 18) /* RW */
105 #define MSDC_CFG_HS400_CK_MODE_EXTRA (0x1 << 22) /* RW */
106 #define MSDC_CFG_CKDIV_EXTRA (0xfff << 8) /* RW */
107 #define MSDC_CFG_CKMOD_EXTRA (0x3 << 20) /* RW */
109 /* MSDC_IOCON mask */
110 #define MSDC_IOCON_SDR104CKS (0x1 << 0) /* RW */
111 #define MSDC_IOCON_RSPL (0x1 << 1) /* RW */
112 #define MSDC_IOCON_DSPL (0x1 << 2) /* RW */
113 #define MSDC_IOCON_DDLSEL (0x1 << 3) /* RW */
114 #define MSDC_IOCON_DDR50CKD (0x1 << 4) /* RW */
115 #define MSDC_IOCON_DSPLSEL (0x1 << 5) /* RW */
116 #define MSDC_IOCON_W_DSPL (0x1 << 8) /* RW */
117 #define MSDC_IOCON_D0SPL (0x1 << 16) /* RW */
118 #define MSDC_IOCON_D1SPL (0x1 << 17) /* RW */
119 #define MSDC_IOCON_D2SPL (0x1 << 18) /* RW */
120 #define MSDC_IOCON_D3SPL (0x1 << 19) /* RW */
121 #define MSDC_IOCON_D4SPL (0x1 << 20) /* RW */
122 #define MSDC_IOCON_D5SPL (0x1 << 21) /* RW */
123 #define MSDC_IOCON_D6SPL (0x1 << 22) /* RW */
124 #define MSDC_IOCON_D7SPL (0x1 << 23) /* RW */
125 #define MSDC_IOCON_RISCSZ (0x3 << 24) /* RW */
128 #define MSDC_PS_CDEN (0x1 << 0) /* RW */
129 #define MSDC_PS_CDSTS (0x1 << 1) /* R */
130 #define MSDC_PS_CDDEBOUNCE (0xf << 12) /* RW */
131 #define MSDC_PS_DAT (0xff << 16) /* R */
132 #define MSDC_PS_CMD (0x1 << 24) /* R */
133 #define MSDC_PS_WP (0x1 << 31) /* R */
136 #define MSDC_INT_MMCIRQ (0x1 << 0) /* W1C */
137 #define MSDC_INT_CDSC (0x1 << 1) /* W1C */
138 #define MSDC_INT_ACMDRDY (0x1 << 3) /* W1C */
139 #define MSDC_INT_ACMDTMO (0x1 << 4) /* W1C */
140 #define MSDC_INT_ACMDCRCERR (0x1 << 5) /* W1C */
141 #define MSDC_INT_DMAQ_EMPTY (0x1 << 6) /* W1C */
142 #define MSDC_INT_SDIOIRQ (0x1 << 7) /* W1C */
143 #define MSDC_INT_CMDRDY (0x1 << 8) /* W1C */
144 #define MSDC_INT_CMDTMO (0x1 << 9) /* W1C */
145 #define MSDC_INT_RSPCRCERR (0x1 << 10) /* W1C */
146 #define MSDC_INT_CSTA (0x1 << 11) /* R */
147 #define MSDC_INT_XFER_COMPL (0x1 << 12) /* W1C */
148 #define MSDC_INT_DXFER_DONE (0x1 << 13) /* W1C */
149 #define MSDC_INT_DATTMO (0x1 << 14) /* W1C */
150 #define MSDC_INT_DATCRCERR (0x1 << 15) /* W1C */
151 #define MSDC_INT_ACMD19_DONE (0x1 << 16) /* W1C */
152 #define MSDC_INT_DMA_BDCSERR (0x1 << 17) /* W1C */
153 #define MSDC_INT_DMA_GPDCSERR (0x1 << 18) /* W1C */
154 #define MSDC_INT_DMA_PROTECT (0x1 << 19) /* W1C */
156 /* MSDC_INTEN mask */
157 #define MSDC_INTEN_MMCIRQ (0x1 << 0) /* RW */
158 #define MSDC_INTEN_CDSC (0x1 << 1) /* RW */
159 #define MSDC_INTEN_ACMDRDY (0x1 << 3) /* RW */
160 #define MSDC_INTEN_ACMDTMO (0x1 << 4) /* RW */
161 #define MSDC_INTEN_ACMDCRCERR (0x1 << 5) /* RW */
162 #define MSDC_INTEN_DMAQ_EMPTY (0x1 << 6) /* RW */
163 #define MSDC_INTEN_SDIOIRQ (0x1 << 7) /* RW */
164 #define MSDC_INTEN_CMDRDY (0x1 << 8) /* RW */
165 #define MSDC_INTEN_CMDTMO (0x1 << 9) /* RW */
166 #define MSDC_INTEN_RSPCRCERR (0x1 << 10) /* RW */
167 #define MSDC_INTEN_CSTA (0x1 << 11) /* RW */
168 #define MSDC_INTEN_XFER_COMPL (0x1 << 12) /* RW */
169 #define MSDC_INTEN_DXFER_DONE (0x1 << 13) /* RW */
170 #define MSDC_INTEN_DATTMO (0x1 << 14) /* RW */
171 #define MSDC_INTEN_DATCRCERR (0x1 << 15) /* RW */
172 #define MSDC_INTEN_ACMD19_DONE (0x1 << 16) /* RW */
173 #define MSDC_INTEN_DMA_BDCSERR (0x1 << 17) /* RW */
174 #define MSDC_INTEN_DMA_GPDCSERR (0x1 << 18) /* RW */
175 #define MSDC_INTEN_DMA_PROTECT (0x1 << 19) /* RW */
177 /* MSDC_FIFOCS mask */
178 #define MSDC_FIFOCS_RXCNT (0xff << 0) /* R */
179 #define MSDC_FIFOCS_TXCNT (0xff << 16) /* R */
180 #define MSDC_FIFOCS_CLR (0x1 << 31) /* RW */
183 #define SDC_CFG_SDIOINTWKUP (0x1 << 0) /* RW */
184 #define SDC_CFG_INSWKUP (0x1 << 1) /* RW */
185 #define SDC_CFG_BUSWIDTH (0x3 << 16) /* RW */
186 #define SDC_CFG_SDIO (0x1 << 19) /* RW */
187 #define SDC_CFG_SDIOIDE (0x1 << 20) /* RW */
188 #define SDC_CFG_INTATGAP (0x1 << 21) /* RW */
189 #define SDC_CFG_DTOC (0xff << 24) /* RW */
192 #define SDC_STS_SDCBUSY (0x1 << 0) /* RW */
193 #define SDC_STS_CMDBUSY (0x1 << 1) /* RW */
194 #define SDC_STS_SWR_COMPL (0x1 << 31) /* RW */
196 /* SDC_ADV_CFG0 mask */
197 #define SDC_RX_ENHANCE_EN (0x1 << 20) /* RW */
199 /* DMA_SA_H4BIT mask */
200 #define DMA_ADDR_HIGH_4BIT (0xf << 0) /* RW */
202 /* MSDC_DMA_CTRL mask */
203 #define MSDC_DMA_CTRL_START (0x1 << 0) /* W */
204 #define MSDC_DMA_CTRL_STOP (0x1 << 1) /* W */
205 #define MSDC_DMA_CTRL_RESUME (0x1 << 2) /* W */
206 #define MSDC_DMA_CTRL_MODE (0x1 << 8) /* RW */
207 #define MSDC_DMA_CTRL_LASTBUF (0x1 << 10) /* RW */
208 #define MSDC_DMA_CTRL_BRUSTSZ (0x7 << 12) /* RW */
210 /* MSDC_DMA_CFG mask */
211 #define MSDC_DMA_CFG_STS (0x1 << 0) /* R */
212 #define MSDC_DMA_CFG_DECSEN (0x1 << 1) /* RW */
213 #define MSDC_DMA_CFG_AHBHPROT2 (0x2 << 8) /* RW */
214 #define MSDC_DMA_CFG_ACTIVEEN (0x2 << 12) /* RW */
215 #define MSDC_DMA_CFG_CS12B16B (0x1 << 16) /* RW */
217 /* MSDC_PATCH_BIT mask */
218 #define MSDC_PATCH_BIT_ODDSUPP (0x1 << 1) /* RW */
219 #define MSDC_INT_DAT_LATCH_CK_SEL (0x7 << 7)
220 #define MSDC_CKGEN_MSDC_DLY_SEL (0x1f << 10)
221 #define MSDC_PATCH_BIT_IODSSEL (0x1 << 16) /* RW */
222 #define MSDC_PATCH_BIT_IOINTSEL (0x1 << 17) /* RW */
223 #define MSDC_PATCH_BIT_BUSYDLY (0xf << 18) /* RW */
224 #define MSDC_PATCH_BIT_WDOD (0xf << 22) /* RW */
225 #define MSDC_PATCH_BIT_IDRTSEL (0x1 << 26) /* RW */
226 #define MSDC_PATCH_BIT_CMDFSEL (0x1 << 27) /* RW */
227 #define MSDC_PATCH_BIT_INTDLSEL (0x1 << 28) /* RW */
228 #define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */
229 #define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */
231 #define MSDC_PATCH_BIT1_CMDTA (0x7 << 3) /* RW */
232 #define MSDC_PATCH_BIT1_STOP_DLY (0xf << 8) /* RW */
234 #define MSDC_PATCH_BIT2_CFGRESP (0x1 << 15) /* RW */
235 #define MSDC_PATCH_BIT2_CFGCRCSTS (0x1 << 28) /* RW */
236 #define MSDC_PB2_SUPPORT_64G (0x1 << 1) /* RW */
237 #define MSDC_PB2_RESPWAIT (0x3 << 2) /* RW */
238 #define MSDC_PB2_RESPSTSENSEL (0x7 << 16) /* RW */
239 #define MSDC_PB2_CRCSTSENSEL (0x7 << 29) /* RW */
241 #define MSDC_PAD_TUNE_DATWRDLY (0x1f << 0) /* RW */
242 #define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */
243 #define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */
244 #define MSDC_PAD_TUNE_CMDRRDLY (0x1f << 22) /* RW */
245 #define MSDC_PAD_TUNE_CLKTDLY (0x1f << 27) /* RW */
246 #define MSDC_PAD_TUNE_RXDLYSEL (0x1 << 15) /* RW */
247 #define MSDC_PAD_TUNE_RD_SEL (0x1 << 13) /* RW */
248 #define MSDC_PAD_TUNE_CMD_SEL (0x1 << 21) /* RW */
250 #define PAD_DS_TUNE_DLY1 (0x1f << 2) /* RW */
251 #define PAD_DS_TUNE_DLY2 (0x1f << 7) /* RW */
252 #define PAD_DS_TUNE_DLY3 (0x1f << 12) /* RW */
254 #define PAD_CMD_TUNE_RX_DLY3 (0x1f << 1) /* RW */
256 #define EMMC50_CFG_PADCMD_LATCHCK (0x1 << 0) /* RW */
257 #define EMMC50_CFG_CRCSTS_EDGE (0x1 << 3) /* RW */
258 #define EMMC50_CFG_CFCSTS_SEL (0x1 << 4) /* RW */
260 #define EMMC50_CFG3_OUTS_WR (0x1f << 0) /* RW */
262 #define SDC_FIFO_CFG_WRVALIDSEL (0x1 << 24) /* RW */
263 #define SDC_FIFO_CFG_RDVALIDSEL (0x1 << 25) /* RW */
265 #define REQ_CMD_EIO (0x1 << 0)
266 #define REQ_CMD_TMO (0x1 << 1)
267 #define REQ_DAT_ERR (0x1 << 2)
268 #define REQ_STOP_EIO (0x1 << 3)
269 #define REQ_STOP_TMO (0x1 << 4)
270 #define REQ_CMD_BUSY (0x1 << 5)
272 #define MSDC_PREPARE_FLAG (0x1 << 0)
273 #define MSDC_ASYNC_FLAG (0x1 << 1)
274 #define MSDC_MMAP_FLAG (0x1 << 2)
276 #define MTK_MMC_AUTOSUSPEND_DELAY 50
277 #define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */
278 #define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */
280 #define PAD_DELAY_MAX 32 /* PAD delay cells */
281 /*--------------------------------------------------------------------------*/
282 /* Descriptor Structure */
283 /*--------------------------------------------------------------------------*/
284 struct mt_gpdma_desc {
286 #define GPDMA_DESC_HWO (0x1 << 0)
287 #define GPDMA_DESC_BDP (0x1 << 1)
288 #define GPDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
289 #define GPDMA_DESC_INT (0x1 << 16)
290 #define GPDMA_DESC_NEXT_H4 (0xf << 24)
291 #define GPDMA_DESC_PTR_H4 (0xf << 28)
295 #define GPDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */
296 #define GPDMA_DESC_EXTLEN (0xff << 16) /* bit16 ~ bit23 */
302 struct mt_bdma_desc {
304 #define BDMA_DESC_EOL (0x1 << 0)
305 #define BDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
306 #define BDMA_DESC_BLKPAD (0x1 << 17)
307 #define BDMA_DESC_DWPAD (0x1 << 18)
308 #define BDMA_DESC_NEXT_H4 (0xf << 24)
309 #define BDMA_DESC_PTR_H4 (0xf << 28)
313 #define BDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */
317 struct scatterlist *sg; /* I/O scatter list */
318 struct mt_gpdma_desc *gpd; /* pointer to gpd array */
319 struct mt_bdma_desc *bd; /* pointer to bd array */
320 dma_addr_t gpd_addr; /* the physical address of gpd array */
321 dma_addr_t bd_addr; /* the physical address of bd array */
324 struct msdc_save_para {
339 struct mtk_mmc_compatible {
341 bool hs400_tune; /* only used for MT8173 */
351 struct msdc_tune_para {
357 struct msdc_delay_phase {
365 const struct mtk_mmc_compatible *dev_comp;
366 struct mmc_host *mmc; /* mmc structure */
370 struct mmc_request *mrq;
371 struct mmc_command *cmd;
372 struct mmc_data *data;
375 void __iomem *base; /* host base address */
377 struct msdc_dma dma; /* dma channel */
380 u32 timeout_ns; /* data timeout ns */
381 u32 timeout_clks; /* data timeout clks */
383 struct pinctrl *pinctrl;
384 struct pinctrl_state *pins_default;
385 struct pinctrl_state *pins_uhs;
386 struct delayed_work req_timeout;
387 int irq; /* host interrupt */
389 struct clk *src_clk; /* msdc source clock */
390 struct clk *h_clk; /* msdc h_clk */
391 struct clk *src_clk_cg; /* msdc source clock control gate */
392 u32 mclk; /* mmc subsystem clock frequency */
393 u32 src_clk_freq; /* source clock frequency */
394 unsigned char timing;
398 u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */
399 u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */
400 bool hs400_cmd_resp_sel_rising;
401 /* cmd response sample selection for HS400 */
402 bool hs400_mode; /* current eMMC will run at hs400 mode */
403 struct msdc_save_para save_para; /* used when gate HCLK */
404 struct msdc_tune_para def_tune_para; /* default tune setting */
405 struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */
408 static const struct mtk_mmc_compatible mt8135_compat = {
411 .pad_tune_reg = MSDC_PAD_TUNE,
415 .stop_clk_fix = false,
417 .support_64g = false,
420 static const struct mtk_mmc_compatible mt8173_compat = {
423 .pad_tune_reg = MSDC_PAD_TUNE,
427 .stop_clk_fix = false,
429 .support_64g = false,
432 static const struct mtk_mmc_compatible mt2701_compat = {
435 .pad_tune_reg = MSDC_PAD_TUNE0,
439 .stop_clk_fix = false,
441 .support_64g = false,
444 static const struct mtk_mmc_compatible mt2712_compat = {
447 .pad_tune_reg = MSDC_PAD_TUNE0,
451 .stop_clk_fix = true,
456 static const struct mtk_mmc_compatible mt7622_compat = {
459 .pad_tune_reg = MSDC_PAD_TUNE0,
463 .stop_clk_fix = true,
465 .support_64g = false,
468 static const struct of_device_id msdc_of_ids[] = {
469 { .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
470 { .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
471 { .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat},
472 { .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat},
473 { .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
476 MODULE_DEVICE_TABLE(of, msdc_of_ids);
478 static void sdr_set_bits(void __iomem *reg, u32 bs)
480 u32 val = readl(reg);
486 static void sdr_clr_bits(void __iomem *reg, u32 bs)
488 u32 val = readl(reg);
494 static void sdr_set_field(void __iomem *reg, u32 field, u32 val)
496 unsigned int tv = readl(reg);
499 tv |= ((val) << (ffs((unsigned int)field) - 1));
503 static void sdr_get_field(void __iomem *reg, u32 field, u32 *val)
505 unsigned int tv = readl(reg);
507 *val = ((tv & field) >> (ffs((unsigned int)field) - 1));
510 static void msdc_reset_hw(struct msdc_host *host)
514 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST);
515 while (readl(host->base + MSDC_CFG) & MSDC_CFG_RST)
518 sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR);
519 while (readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_CLR)
522 val = readl(host->base + MSDC_INT);
523 writel(val, host->base + MSDC_INT);
526 static void msdc_cmd_next(struct msdc_host *host,
527 struct mmc_request *mrq, struct mmc_command *cmd);
529 static const u32 cmd_ints_mask = MSDC_INTEN_CMDRDY | MSDC_INTEN_RSPCRCERR |
530 MSDC_INTEN_CMDTMO | MSDC_INTEN_ACMDRDY |
531 MSDC_INTEN_ACMDCRCERR | MSDC_INTEN_ACMDTMO;
532 static const u32 data_ints_mask = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO |
533 MSDC_INTEN_DATCRCERR | MSDC_INTEN_DMA_BDCSERR |
534 MSDC_INTEN_DMA_GPDCSERR | MSDC_INTEN_DMA_PROTECT;
536 static u8 msdc_dma_calcs(u8 *buf, u32 len)
540 for (i = 0; i < len; i++)
542 return 0xff - (u8) sum;
545 static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
546 struct mmc_data *data)
548 unsigned int j, dma_len;
549 dma_addr_t dma_address;
551 struct scatterlist *sg;
552 struct mt_gpdma_desc *gpd;
553 struct mt_bdma_desc *bd;
561 gpd->gpd_info |= GPDMA_DESC_HWO;
562 gpd->gpd_info |= GPDMA_DESC_BDP;
563 /* need to clear first. use these bits to calc checksum */
564 gpd->gpd_info &= ~GPDMA_DESC_CHECKSUM;
565 gpd->gpd_info |= msdc_dma_calcs((u8 *) gpd, 16) << 8;
568 for_each_sg(data->sg, sg, data->sg_count, j) {
569 dma_address = sg_dma_address(sg);
570 dma_len = sg_dma_len(sg);
573 bd[j].bd_info &= ~BDMA_DESC_BLKPAD;
574 bd[j].bd_info &= ~BDMA_DESC_DWPAD;
575 bd[j].ptr = lower_32_bits(dma_address);
576 if (host->dev_comp->support_64g) {
577 bd[j].bd_info &= ~BDMA_DESC_PTR_H4;
578 bd[j].bd_info |= (upper_32_bits(dma_address) & 0xf)
581 bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN;
582 bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN);
584 if (j == data->sg_count - 1) /* the last bd */
585 bd[j].bd_info |= BDMA_DESC_EOL;
587 bd[j].bd_info &= ~BDMA_DESC_EOL;
589 /* checksume need to clear first */
590 bd[j].bd_info &= ~BDMA_DESC_CHECKSUM;
591 bd[j].bd_info |= msdc_dma_calcs((u8 *)(&bd[j]), 16) << 8;
594 sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1);
595 dma_ctrl = readl_relaxed(host->base + MSDC_DMA_CTRL);
596 dma_ctrl &= ~(MSDC_DMA_CTRL_BRUSTSZ | MSDC_DMA_CTRL_MODE);
597 dma_ctrl |= (MSDC_BURST_64B << 12 | 1 << 8);
598 writel_relaxed(dma_ctrl, host->base + MSDC_DMA_CTRL);
599 if (host->dev_comp->support_64g)
600 sdr_set_field(host->base + DMA_SA_H4BIT, DMA_ADDR_HIGH_4BIT,
601 upper_32_bits(dma->gpd_addr) & 0xf);
602 writel(lower_32_bits(dma->gpd_addr), host->base + MSDC_DMA_SA);
605 static void msdc_prepare_data(struct msdc_host *host, struct mmc_request *mrq)
607 struct mmc_data *data = mrq->data;
609 if (!(data->host_cookie & MSDC_PREPARE_FLAG)) {
610 data->host_cookie |= MSDC_PREPARE_FLAG;
611 data->sg_count = dma_map_sg(host->dev, data->sg, data->sg_len,
612 mmc_get_dma_dir(data));
616 static void msdc_unprepare_data(struct msdc_host *host, struct mmc_request *mrq)
618 struct mmc_data *data = mrq->data;
620 if (data->host_cookie & MSDC_ASYNC_FLAG)
623 if (data->host_cookie & MSDC_PREPARE_FLAG) {
624 dma_unmap_sg(host->dev, data->sg, data->sg_len,
625 mmc_get_dma_dir(data));
626 data->host_cookie &= ~MSDC_PREPARE_FLAG;
630 /* clock control primitives */
631 static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
636 host->timeout_ns = ns;
637 host->timeout_clks = clks;
638 if (host->mmc->actual_clock == 0) {
641 clk_ns = 1000000000UL / host->mmc->actual_clock;
642 timeout = (ns + clk_ns - 1) / clk_ns + clks;
643 /* in 1048576 sclk cycle unit */
644 timeout = (timeout + (0x1 << 20) - 1) >> 20;
645 if (host->dev_comp->clk_div_bits == 8)
646 sdr_get_field(host->base + MSDC_CFG,
647 MSDC_CFG_CKMOD, &mode);
649 sdr_get_field(host->base + MSDC_CFG,
650 MSDC_CFG_CKMOD_EXTRA, &mode);
651 /*DDR mode will double the clk cycles for data timeout */
652 timeout = mode >= 2 ? timeout * 2 : timeout;
653 timeout = timeout > 1 ? timeout - 1 : 0;
654 timeout = timeout > 255 ? 255 : timeout;
656 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, timeout);
659 static void msdc_gate_clock(struct msdc_host *host)
661 clk_disable_unprepare(host->src_clk_cg);
662 clk_disable_unprepare(host->src_clk);
663 clk_disable_unprepare(host->h_clk);
666 static void msdc_ungate_clock(struct msdc_host *host)
668 clk_prepare_enable(host->h_clk);
669 clk_prepare_enable(host->src_clk);
670 clk_prepare_enable(host->src_clk_cg);
671 while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
675 static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
681 u32 tune_reg = host->dev_comp->pad_tune_reg;
684 dev_dbg(host->dev, "set mclk to 0\n");
686 host->mmc->actual_clock = 0;
687 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
691 flags = readl(host->base + MSDC_INTEN);
692 sdr_clr_bits(host->base + MSDC_INTEN, flags);
693 if (host->dev_comp->clk_div_bits == 8)
694 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE);
696 sdr_clr_bits(host->base + MSDC_CFG,
697 MSDC_CFG_HS400_CK_MODE_EXTRA);
698 if (timing == MMC_TIMING_UHS_DDR50 ||
699 timing == MMC_TIMING_MMC_DDR52 ||
700 timing == MMC_TIMING_MMC_HS400) {
701 if (timing == MMC_TIMING_MMC_HS400)
704 mode = 0x2; /* ddr mode and use divisor */
706 if (hz >= (host->src_clk_freq >> 2)) {
707 div = 0; /* mean div = 1/4 */
708 sclk = host->src_clk_freq >> 2; /* sclk = clk / 4 */
710 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
711 sclk = (host->src_clk_freq >> 2) / div;
715 if (timing == MMC_TIMING_MMC_HS400 &&
716 hz >= (host->src_clk_freq >> 1)) {
717 if (host->dev_comp->clk_div_bits == 8)
718 sdr_set_bits(host->base + MSDC_CFG,
719 MSDC_CFG_HS400_CK_MODE);
721 sdr_set_bits(host->base + MSDC_CFG,
722 MSDC_CFG_HS400_CK_MODE_EXTRA);
723 sclk = host->src_clk_freq >> 1;
724 div = 0; /* div is ignore when bit18 is set */
726 } else if (hz >= host->src_clk_freq) {
727 mode = 0x1; /* no divisor */
729 sclk = host->src_clk_freq;
731 mode = 0x0; /* use divisor */
732 if (hz >= (host->src_clk_freq >> 1)) {
733 div = 0; /* mean div = 1/2 */
734 sclk = host->src_clk_freq >> 1; /* sclk = clk / 2 */
736 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
737 sclk = (host->src_clk_freq >> 2) / div;
740 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
742 * As src_clk/HCLK use the same bit to gate/ungate,
743 * So if want to only gate src_clk, need gate its parent(mux).
745 if (host->src_clk_cg)
746 clk_disable_unprepare(host->src_clk_cg);
748 clk_disable_unprepare(clk_get_parent(host->src_clk));
749 if (host->dev_comp->clk_div_bits == 8)
750 sdr_set_field(host->base + MSDC_CFG,
751 MSDC_CFG_CKMOD | MSDC_CFG_CKDIV,
754 sdr_set_field(host->base + MSDC_CFG,
755 MSDC_CFG_CKMOD_EXTRA | MSDC_CFG_CKDIV_EXTRA,
757 if (host->src_clk_cg)
758 clk_prepare_enable(host->src_clk_cg);
760 clk_prepare_enable(clk_get_parent(host->src_clk));
762 while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
764 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
765 host->mmc->actual_clock = sclk;
767 host->timing = timing;
768 /* need because clk changed. */
769 msdc_set_timeout(host, host->timeout_ns, host->timeout_clks);
770 sdr_set_bits(host->base + MSDC_INTEN, flags);
773 * mmc_select_hs400() will drop to 50Mhz and High speed mode,
774 * tune result of hs200/200Mhz is not suitable for 50Mhz
776 if (host->mmc->actual_clock <= 52000000) {
777 writel(host->def_tune_para.iocon, host->base + MSDC_IOCON);
778 writel(host->def_tune_para.pad_tune, host->base + tune_reg);
780 writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON);
781 writel(host->saved_tune_para.pad_tune, host->base + tune_reg);
782 writel(host->saved_tune_para.pad_cmd_tune,
783 host->base + PAD_CMD_TUNE);
786 if (timing == MMC_TIMING_MMC_HS400 &&
787 host->dev_comp->hs400_tune)
788 sdr_set_field(host->base + tune_reg,
789 MSDC_PAD_TUNE_CMDRRDLY,
790 host->hs400_cmd_int_delay);
791 dev_dbg(host->dev, "sclk: %d, timing: %d\n", host->mmc->actual_clock,
795 static inline u32 msdc_cmd_find_resp(struct msdc_host *host,
796 struct mmc_request *mrq, struct mmc_command *cmd)
800 switch (mmc_resp_type(cmd)) {
801 /* Actually, R1, R5, R6, R7 are the same */
823 static inline u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host,
824 struct mmc_request *mrq, struct mmc_command *cmd)
827 * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 |
828 * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode
830 u32 opcode = cmd->opcode;
831 u32 resp = msdc_cmd_find_resp(host, mrq, cmd);
832 u32 rawcmd = (opcode & 0x3f) | ((resp & 0x7) << 7);
834 host->cmd_rsp = resp;
836 if ((opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int) -1) ||
837 opcode == MMC_STOP_TRANSMISSION)
838 rawcmd |= (0x1 << 14);
839 else if (opcode == SD_SWITCH_VOLTAGE)
840 rawcmd |= (0x1 << 30);
841 else if (opcode == SD_APP_SEND_SCR ||
842 opcode == SD_APP_SEND_NUM_WR_BLKS ||
843 (opcode == SD_SWITCH && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
844 (opcode == SD_APP_SD_STATUS && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
845 (opcode == MMC_SEND_EXT_CSD && mmc_cmd_type(cmd) == MMC_CMD_ADTC))
846 rawcmd |= (0x1 << 11);
849 struct mmc_data *data = cmd->data;
851 if (mmc_op_multi(opcode)) {
852 if (mmc_card_mmc(host->mmc->card) && mrq->sbc &&
853 !(mrq->sbc->arg & 0xFFFF0000))
854 rawcmd |= 0x2 << 28; /* AutoCMD23 */
857 rawcmd |= ((data->blksz & 0xFFF) << 16);
858 if (data->flags & MMC_DATA_WRITE)
859 rawcmd |= (0x1 << 13);
860 if (data->blocks > 1)
861 rawcmd |= (0x2 << 11);
863 rawcmd |= (0x1 << 11);
864 /* Always use dma mode */
865 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO);
867 if (host->timeout_ns != data->timeout_ns ||
868 host->timeout_clks != data->timeout_clks)
869 msdc_set_timeout(host, data->timeout_ns,
872 writel(data->blocks, host->base + SDC_BLK_NUM);
877 static void msdc_start_data(struct msdc_host *host, struct mmc_request *mrq,
878 struct mmc_command *cmd, struct mmc_data *data)
884 read = data->flags & MMC_DATA_READ;
886 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
887 msdc_dma_setup(host, &host->dma, data);
888 sdr_set_bits(host->base + MSDC_INTEN, data_ints_mask);
889 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1);
890 dev_dbg(host->dev, "DMA start\n");
891 dev_dbg(host->dev, "%s: cmd=%d DMA data: %d blocks; read=%d\n",
892 __func__, cmd->opcode, data->blocks, read);
895 static int msdc_auto_cmd_done(struct msdc_host *host, int events,
896 struct mmc_command *cmd)
898 u32 *rsp = cmd->resp;
900 rsp[0] = readl(host->base + SDC_ACMD_RESP);
902 if (events & MSDC_INT_ACMDRDY) {
906 if (events & MSDC_INT_ACMDCRCERR) {
907 cmd->error = -EILSEQ;
908 host->error |= REQ_STOP_EIO;
909 } else if (events & MSDC_INT_ACMDTMO) {
910 cmd->error = -ETIMEDOUT;
911 host->error |= REQ_STOP_TMO;
914 "%s: AUTO_CMD%d arg=%08X; rsp %08X; cmd_error=%d\n",
915 __func__, cmd->opcode, cmd->arg, rsp[0], cmd->error);
920 static void msdc_track_cmd_data(struct msdc_host *host,
921 struct mmc_command *cmd, struct mmc_data *data)
924 dev_dbg(host->dev, "%s: cmd=%d arg=%08X; host->error=0x%08X\n",
925 __func__, cmd->opcode, cmd->arg, host->error);
928 static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq)
933 * No need check the return value of cancel_delayed_work, as only ONE
936 cancel_delayed_work(&host->req_timeout);
938 spin_lock_irqsave(&host->lock, flags);
940 spin_unlock_irqrestore(&host->lock, flags);
942 msdc_track_cmd_data(host, mrq->cmd, mrq->data);
944 msdc_unprepare_data(host, mrq);
945 mmc_request_done(host->mmc, mrq);
948 /* returns true if command is fully handled; returns false otherwise */
949 static bool msdc_cmd_done(struct msdc_host *host, int events,
950 struct mmc_request *mrq, struct mmc_command *cmd)
957 if (mrq->sbc && cmd == mrq->cmd &&
958 (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR
959 | MSDC_INT_ACMDTMO)))
960 msdc_auto_cmd_done(host, events, mrq->sbc);
962 sbc_error = mrq->sbc && mrq->sbc->error;
964 if (!sbc_error && !(events & (MSDC_INT_CMDRDY
969 spin_lock_irqsave(&host->lock, flags);
972 spin_unlock_irqrestore(&host->lock, flags);
978 sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask);
980 if (cmd->flags & MMC_RSP_PRESENT) {
981 if (cmd->flags & MMC_RSP_136) {
982 rsp[0] = readl(host->base + SDC_RESP3);
983 rsp[1] = readl(host->base + SDC_RESP2);
984 rsp[2] = readl(host->base + SDC_RESP1);
985 rsp[3] = readl(host->base + SDC_RESP0);
987 rsp[0] = readl(host->base + SDC_RESP0);
991 if (!sbc_error && !(events & MSDC_INT_CMDRDY)) {
992 if (cmd->opcode != MMC_SEND_TUNING_BLOCK &&
993 cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200)
995 * should not clear fifo/interrupt as the tune data
996 * may have alreay come.
999 if (events & MSDC_INT_RSPCRCERR) {
1000 cmd->error = -EILSEQ;
1001 host->error |= REQ_CMD_EIO;
1002 } else if (events & MSDC_INT_CMDTMO) {
1003 cmd->error = -ETIMEDOUT;
1004 host->error |= REQ_CMD_TMO;
1009 "%s: cmd=%d arg=%08X; rsp %08X; cmd_error=%d\n",
1010 __func__, cmd->opcode, cmd->arg, rsp[0],
1013 msdc_cmd_next(host, mrq, cmd);
1017 /* It is the core layer's responsibility to ensure card status
1018 * is correct before issue a request. but host design do below
1019 * checks recommended.
1021 static inline bool msdc_cmd_is_ready(struct msdc_host *host,
1022 struct mmc_request *mrq, struct mmc_command *cmd)
1024 /* The max busy time we can endure is 20ms */
1025 unsigned long tmo = jiffies + msecs_to_jiffies(20);
1027 while ((readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) &&
1028 time_before(jiffies, tmo))
1030 if (readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) {
1031 dev_err(host->dev, "CMD bus busy detected\n");
1032 host->error |= REQ_CMD_BUSY;
1033 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1037 if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) {
1038 tmo = jiffies + msecs_to_jiffies(20);
1039 /* R1B or with data, should check SDCBUSY */
1040 while ((readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) &&
1041 time_before(jiffies, tmo))
1043 if (readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) {
1044 dev_err(host->dev, "Controller busy detected\n");
1045 host->error |= REQ_CMD_BUSY;
1046 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1053 static void msdc_start_command(struct msdc_host *host,
1054 struct mmc_request *mrq, struct mmc_command *cmd)
1061 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
1062 if (!msdc_cmd_is_ready(host, mrq, cmd))
1065 if ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16 ||
1066 readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) {
1067 dev_err(host->dev, "TX/RX FIFO non-empty before start of IO. Reset\n");
1068 msdc_reset_hw(host);
1072 rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd);
1074 sdr_set_bits(host->base + MSDC_INTEN, cmd_ints_mask);
1075 writel(cmd->arg, host->base + SDC_ARG);
1076 writel(rawcmd, host->base + SDC_CMD);
1079 static void msdc_cmd_next(struct msdc_host *host,
1080 struct mmc_request *mrq, struct mmc_command *cmd)
1083 !(cmd->error == -EILSEQ &&
1084 (cmd->opcode == MMC_SEND_TUNING_BLOCK ||
1085 cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200))) ||
1086 (mrq->sbc && mrq->sbc->error))
1087 msdc_request_done(host, mrq);
1088 else if (cmd == mrq->sbc)
1089 msdc_start_command(host, mrq, mrq->cmd);
1090 else if (!cmd->data)
1091 msdc_request_done(host, mrq);
1093 msdc_start_data(host, mrq, cmd, cmd->data);
1096 static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq)
1098 struct msdc_host *host = mmc_priv(mmc);
1105 msdc_prepare_data(host, mrq);
1107 /* if SBC is required, we have HW option and SW option.
1108 * if HW option is enabled, and SBC does not have "special" flags,
1109 * use HW option, otherwise use SW option
1111 if (mrq->sbc && (!mmc_card_mmc(mmc->card) ||
1112 (mrq->sbc->arg & 0xFFFF0000)))
1113 msdc_start_command(host, mrq, mrq->sbc);
1115 msdc_start_command(host, mrq, mrq->cmd);
1118 static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
1120 struct msdc_host *host = mmc_priv(mmc);
1121 struct mmc_data *data = mrq->data;
1126 msdc_prepare_data(host, mrq);
1127 data->host_cookie |= MSDC_ASYNC_FLAG;
1130 static void msdc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
1133 struct msdc_host *host = mmc_priv(mmc);
1134 struct mmc_data *data;
1139 if (data->host_cookie) {
1140 data->host_cookie &= ~MSDC_ASYNC_FLAG;
1141 msdc_unprepare_data(host, mrq);
1145 static void msdc_data_xfer_next(struct msdc_host *host,
1146 struct mmc_request *mrq, struct mmc_data *data)
1148 if (mmc_op_multi(mrq->cmd->opcode) && mrq->stop && !mrq->stop->error &&
1150 msdc_start_command(host, mrq, mrq->stop);
1152 msdc_request_done(host, mrq);
1155 static bool msdc_data_xfer_done(struct msdc_host *host, u32 events,
1156 struct mmc_request *mrq, struct mmc_data *data)
1158 struct mmc_command *stop;
1159 unsigned long flags;
1161 unsigned int check_data = events &
1162 (MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO
1163 | MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR
1164 | MSDC_INT_DMA_PROTECT);
1166 spin_lock_irqsave(&host->lock, flags);
1170 spin_unlock_irqrestore(&host->lock, flags);
1176 if (check_data || (stop && stop->error)) {
1177 dev_dbg(host->dev, "DMA status: 0x%8X\n",
1178 readl(host->base + MSDC_DMA_CFG));
1179 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP,
1181 while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
1183 sdr_clr_bits(host->base + MSDC_INTEN, data_ints_mask);
1184 dev_dbg(host->dev, "DMA stop\n");
1186 if ((events & MSDC_INT_XFER_COMPL) && (!stop || !stop->error)) {
1187 data->bytes_xfered = data->blocks * data->blksz;
1189 dev_dbg(host->dev, "interrupt events: %x\n", events);
1190 msdc_reset_hw(host);
1191 host->error |= REQ_DAT_ERR;
1192 data->bytes_xfered = 0;
1194 if (events & MSDC_INT_DATTMO)
1195 data->error = -ETIMEDOUT;
1196 else if (events & MSDC_INT_DATCRCERR)
1197 data->error = -EILSEQ;
1199 dev_dbg(host->dev, "%s: cmd=%d; blocks=%d",
1200 __func__, mrq->cmd->opcode, data->blocks);
1201 dev_dbg(host->dev, "data_error=%d xfer_size=%d\n",
1202 (int)data->error, data->bytes_xfered);
1205 msdc_data_xfer_next(host, mrq, data);
1211 static void msdc_set_buswidth(struct msdc_host *host, u32 width)
1213 u32 val = readl(host->base + SDC_CFG);
1215 val &= ~SDC_CFG_BUSWIDTH;
1219 case MMC_BUS_WIDTH_1:
1220 val |= (MSDC_BUS_1BITS << 16);
1222 case MMC_BUS_WIDTH_4:
1223 val |= (MSDC_BUS_4BITS << 16);
1225 case MMC_BUS_WIDTH_8:
1226 val |= (MSDC_BUS_8BITS << 16);
1230 writel(val, host->base + SDC_CFG);
1231 dev_dbg(host->dev, "Bus Width = %d", width);
1234 static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios)
1236 struct msdc_host *host = mmc_priv(mmc);
1239 if (!IS_ERR(mmc->supply.vqmmc)) {
1240 if (ios->signal_voltage != MMC_SIGNAL_VOLTAGE_330 &&
1241 ios->signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
1242 dev_err(host->dev, "Unsupported signal voltage!\n");
1246 ret = mmc_regulator_set_vqmmc(mmc, ios);
1248 dev_dbg(host->dev, "Regulator set error %d (%d)\n",
1249 ret, ios->signal_voltage);
1251 /* Apply different pinctrl settings for different signal voltage */
1252 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
1253 pinctrl_select_state(host->pinctrl, host->pins_uhs);
1255 pinctrl_select_state(host->pinctrl, host->pins_default);
1261 static int msdc_card_busy(struct mmc_host *mmc)
1263 struct msdc_host *host = mmc_priv(mmc);
1264 u32 status = readl(host->base + MSDC_PS);
1266 /* only check if data0 is low */
1267 return !(status & BIT(16));
1270 static void msdc_request_timeout(struct work_struct *work)
1272 struct msdc_host *host = container_of(work, struct msdc_host,
1275 /* simulate HW timeout status */
1276 dev_err(host->dev, "%s: aborting cmd/data/mrq\n", __func__);
1278 dev_err(host->dev, "%s: aborting mrq=%p cmd=%d\n", __func__,
1279 host->mrq, host->mrq->cmd->opcode);
1281 dev_err(host->dev, "%s: aborting cmd=%d\n",
1282 __func__, host->cmd->opcode);
1283 msdc_cmd_done(host, MSDC_INT_CMDTMO, host->mrq,
1285 } else if (host->data) {
1286 dev_err(host->dev, "%s: abort data: cmd%d; %d blocks\n",
1287 __func__, host->mrq->cmd->opcode,
1288 host->data->blocks);
1289 msdc_data_xfer_done(host, MSDC_INT_DATTMO, host->mrq,
1295 static irqreturn_t msdc_irq(int irq, void *dev_id)
1297 struct msdc_host *host = (struct msdc_host *) dev_id;
1300 unsigned long flags;
1301 struct mmc_request *mrq;
1302 struct mmc_command *cmd;
1303 struct mmc_data *data;
1304 u32 events, event_mask;
1306 spin_lock_irqsave(&host->lock, flags);
1307 events = readl(host->base + MSDC_INT);
1308 event_mask = readl(host->base + MSDC_INTEN);
1309 /* clear interrupts */
1310 writel(events & event_mask, host->base + MSDC_INT);
1315 spin_unlock_irqrestore(&host->lock, flags);
1317 if (!(events & event_mask))
1322 "%s: MRQ=NULL; events=%08X; event_mask=%08X\n",
1323 __func__, events, event_mask);
1328 dev_dbg(host->dev, "%s: events=%08X\n", __func__, events);
1331 msdc_cmd_done(host, events, mrq, cmd);
1333 msdc_data_xfer_done(host, events, mrq, data);
1339 static void msdc_init_hw(struct msdc_host *host)
1342 u32 tune_reg = host->dev_comp->pad_tune_reg;
1344 /* Configure to MMC/SD mode, clock free running */
1345 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN);
1348 msdc_reset_hw(host);
1350 /* Disable card detection */
1351 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1353 /* Disable and clear all interrupts */
1354 writel(0, host->base + MSDC_INTEN);
1355 val = readl(host->base + MSDC_INT);
1356 writel(val, host->base + MSDC_INT);
1358 writel(0, host->base + tune_reg);
1359 writel(0, host->base + MSDC_IOCON);
1360 sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0);
1361 writel(0x403c0046, host->base + MSDC_PATCH_BIT);
1362 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1);
1363 writel(0xffff4089, host->base + MSDC_PATCH_BIT1);
1364 sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL);
1366 if (host->dev_comp->stop_clk_fix) {
1367 sdr_set_field(host->base + MSDC_PATCH_BIT1,
1368 MSDC_PATCH_BIT1_STOP_DLY, 3);
1369 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1370 SDC_FIFO_CFG_WRVALIDSEL);
1371 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1372 SDC_FIFO_CFG_RDVALIDSEL);
1375 if (host->dev_comp->busy_check)
1376 sdr_clr_bits(host->base + MSDC_PATCH_BIT1, (1 << 7));
1378 if (host->dev_comp->async_fifo) {
1379 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1380 MSDC_PB2_RESPWAIT, 3);
1381 if (host->dev_comp->enhance_rx) {
1382 sdr_set_bits(host->base + SDC_ADV_CFG0,
1385 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1386 MSDC_PB2_RESPSTSENSEL, 2);
1387 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1388 MSDC_PB2_CRCSTSENSEL, 2);
1390 /* use async fifo, then no need tune internal delay */
1391 sdr_clr_bits(host->base + MSDC_PATCH_BIT2,
1392 MSDC_PATCH_BIT2_CFGRESP);
1393 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1394 MSDC_PATCH_BIT2_CFGCRCSTS);
1397 if (host->dev_comp->support_64g)
1398 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1399 MSDC_PB2_SUPPORT_64G);
1400 if (host->dev_comp->data_tune) {
1401 sdr_set_bits(host->base + tune_reg,
1402 MSDC_PAD_TUNE_RD_SEL | MSDC_PAD_TUNE_CMD_SEL);
1404 /* choose clock tune */
1405 sdr_set_bits(host->base + tune_reg, MSDC_PAD_TUNE_RXDLYSEL);
1408 /* Configure to enable SDIO mode.
1409 * it's must otherwise sdio cmd5 failed
1411 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
1413 /* disable detect SDIO device interrupt function */
1414 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1416 /* Configure to default data timeout */
1417 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3);
1419 host->def_tune_para.iocon = readl(host->base + MSDC_IOCON);
1420 host->def_tune_para.pad_tune = readl(host->base + tune_reg);
1421 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
1422 host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
1423 dev_dbg(host->dev, "init hardware done!");
1426 static void msdc_deinit_hw(struct msdc_host *host)
1429 /* Disable and clear all interrupts */
1430 writel(0, host->base + MSDC_INTEN);
1432 val = readl(host->base + MSDC_INT);
1433 writel(val, host->base + MSDC_INT);
1436 /* init gpd and bd list in msdc_drv_probe */
1437 static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
1439 struct mt_gpdma_desc *gpd = dma->gpd;
1440 struct mt_bdma_desc *bd = dma->bd;
1441 dma_addr_t dma_addr;
1444 memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2);
1446 dma_addr = dma->gpd_addr + sizeof(struct mt_gpdma_desc);
1447 gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */
1448 /* gpd->next is must set for desc DMA
1449 * That's why must alloc 2 gpd structure.
1451 gpd->next = lower_32_bits(dma_addr);
1452 if (host->dev_comp->support_64g)
1453 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1455 dma_addr = dma->bd_addr;
1456 gpd->ptr = lower_32_bits(dma->bd_addr); /* physical address */
1457 if (host->dev_comp->support_64g)
1458 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 28;
1460 memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM);
1461 for (i = 0; i < (MAX_BD_NUM - 1); i++) {
1462 dma_addr = dma->bd_addr + sizeof(*bd) * (i + 1);
1463 bd[i].next = lower_32_bits(dma_addr);
1464 if (host->dev_comp->support_64g)
1465 bd[i].bd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1469 static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1471 struct msdc_host *host = mmc_priv(mmc);
1474 msdc_set_buswidth(host, ios->bus_width);
1476 /* Suspend/Resume will do power off/on */
1477 switch (ios->power_mode) {
1479 if (!IS_ERR(mmc->supply.vmmc)) {
1481 ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc,
1484 dev_err(host->dev, "Failed to set vmmc power!\n");
1490 if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) {
1491 ret = regulator_enable(mmc->supply.vqmmc);
1493 dev_err(host->dev, "Failed to set vqmmc power!\n");
1495 host->vqmmc_enabled = true;
1499 if (!IS_ERR(mmc->supply.vmmc))
1500 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
1502 if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) {
1503 regulator_disable(mmc->supply.vqmmc);
1504 host->vqmmc_enabled = false;
1511 if (host->mclk != ios->clock || host->timing != ios->timing)
1512 msdc_set_mclk(host, ios->timing, ios->clock);
1515 static u32 test_delay_bit(u32 delay, u32 bit)
1517 bit %= PAD_DELAY_MAX;
1518 return delay & (1 << bit);
1521 static int get_delay_len(u32 delay, u32 start_bit)
1525 for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) {
1526 if (test_delay_bit(delay, start_bit + i) == 0)
1529 return PAD_DELAY_MAX - start_bit;
1532 static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay)
1534 int start = 0, len = 0;
1535 int start_final = 0, len_final = 0;
1536 u8 final_phase = 0xff;
1537 struct msdc_delay_phase delay_phase = { 0, };
1540 dev_err(host->dev, "phase error: [map:%x]\n", delay);
1541 delay_phase.final_phase = final_phase;
1545 while (start < PAD_DELAY_MAX) {
1546 len = get_delay_len(delay, start);
1547 if (len_final < len) {
1548 start_final = start;
1551 start += len ? len : 1;
1552 if (len >= 12 && start_final < 4)
1556 /* The rule is that to find the smallest delay cell */
1557 if (start_final == 0)
1558 final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX;
1560 final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX;
1561 dev_info(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n",
1562 delay, len_final, final_phase);
1564 delay_phase.maxlen = len_final;
1565 delay_phase.start = start_final;
1566 delay_phase.final_phase = final_phase;
1570 static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
1572 struct msdc_host *host = mmc_priv(mmc);
1573 u32 rise_delay = 0, fall_delay = 0;
1574 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
1575 struct msdc_delay_phase internal_delay_phase;
1576 u8 final_delay, final_maxlen;
1577 u32 internal_delay = 0;
1578 u32 tune_reg = host->dev_comp->pad_tune_reg;
1582 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
1583 mmc->ios.timing == MMC_TIMING_UHS_SDR104)
1584 sdr_set_field(host->base + tune_reg,
1585 MSDC_PAD_TUNE_CMDRRDLY,
1586 host->hs200_cmd_int_delay);
1588 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1589 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1590 sdr_set_field(host->base + tune_reg,
1591 MSDC_PAD_TUNE_CMDRDLY, i);
1593 * Using the same parameters, it may sometimes pass the test,
1594 * but sometimes it may fail. To make sure the parameters are
1595 * more stable, we test each set of parameters 3 times.
1597 for (j = 0; j < 3; j++) {
1598 mmc_send_tuning(mmc, opcode, &cmd_err);
1600 rise_delay |= (1 << i);
1602 rise_delay &= ~(1 << i);
1607 final_rise_delay = get_best_delay(host, rise_delay);
1608 /* if rising edge has enough margin, then do not scan falling edge */
1609 if (final_rise_delay.maxlen >= 12 ||
1610 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
1613 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1614 for (i = 0; i < PAD_DELAY_MAX; i++) {
1615 sdr_set_field(host->base + tune_reg,
1616 MSDC_PAD_TUNE_CMDRDLY, i);
1618 * Using the same parameters, it may sometimes pass the test,
1619 * but sometimes it may fail. To make sure the parameters are
1620 * more stable, we test each set of parameters 3 times.
1622 for (j = 0; j < 3; j++) {
1623 mmc_send_tuning(mmc, opcode, &cmd_err);
1625 fall_delay |= (1 << i);
1627 fall_delay &= ~(1 << i);
1632 final_fall_delay = get_best_delay(host, fall_delay);
1635 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
1636 if (final_fall_delay.maxlen >= 12 && final_fall_delay.start < 4)
1637 final_maxlen = final_fall_delay.maxlen;
1638 if (final_maxlen == final_rise_delay.maxlen) {
1639 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1640 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
1641 final_rise_delay.final_phase);
1642 final_delay = final_rise_delay.final_phase;
1644 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1645 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
1646 final_fall_delay.final_phase);
1647 final_delay = final_fall_delay.final_phase;
1649 if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay)
1652 for (i = 0; i < PAD_DELAY_MAX; i++) {
1653 sdr_set_field(host->base + tune_reg,
1654 MSDC_PAD_TUNE_CMDRRDLY, i);
1655 mmc_send_tuning(mmc, opcode, &cmd_err);
1657 internal_delay |= (1 << i);
1659 dev_dbg(host->dev, "Final internal delay: 0x%x\n", internal_delay);
1660 internal_delay_phase = get_best_delay(host, internal_delay);
1661 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY,
1662 internal_delay_phase.final_phase);
1664 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
1665 return final_delay == 0xff ? -EIO : 0;
1668 static int hs400_tune_response(struct mmc_host *mmc, u32 opcode)
1670 struct msdc_host *host = mmc_priv(mmc);
1672 struct msdc_delay_phase final_cmd_delay = { 0,};
1677 /* select EMMC50 PAD CMD tune */
1678 sdr_set_bits(host->base + PAD_CMD_TUNE, BIT(0));
1679 sdr_set_field(host->base + MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_CMDTA, 2);
1681 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
1682 mmc->ios.timing == MMC_TIMING_UHS_SDR104)
1683 sdr_set_field(host->base + MSDC_PAD_TUNE,
1684 MSDC_PAD_TUNE_CMDRRDLY,
1685 host->hs200_cmd_int_delay);
1687 if (host->hs400_cmd_resp_sel_rising)
1688 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1690 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1691 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1692 sdr_set_field(host->base + PAD_CMD_TUNE,
1693 PAD_CMD_TUNE_RX_DLY3, i);
1695 * Using the same parameters, it may sometimes pass the test,
1696 * but sometimes it may fail. To make sure the parameters are
1697 * more stable, we test each set of parameters 3 times.
1699 for (j = 0; j < 3; j++) {
1700 mmc_send_tuning(mmc, opcode, &cmd_err);
1702 cmd_delay |= (1 << i);
1704 cmd_delay &= ~(1 << i);
1709 final_cmd_delay = get_best_delay(host, cmd_delay);
1710 sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3,
1711 final_cmd_delay.final_phase);
1712 final_delay = final_cmd_delay.final_phase;
1714 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
1715 return final_delay == 0xff ? -EIO : 0;
1718 static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
1720 struct msdc_host *host = mmc_priv(mmc);
1721 u32 rise_delay = 0, fall_delay = 0;
1722 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
1723 u8 final_delay, final_maxlen;
1724 u32 tune_reg = host->dev_comp->pad_tune_reg;
1727 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL,
1729 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1730 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1731 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1732 sdr_set_field(host->base + tune_reg,
1733 MSDC_PAD_TUNE_DATRRDLY, i);
1734 ret = mmc_send_tuning(mmc, opcode, NULL);
1736 rise_delay |= (1 << i);
1738 final_rise_delay = get_best_delay(host, rise_delay);
1739 /* if rising edge has enough margin, then do not scan falling edge */
1740 if (final_rise_delay.maxlen >= 12 ||
1741 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
1744 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1745 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1746 for (i = 0; i < PAD_DELAY_MAX; i++) {
1747 sdr_set_field(host->base + tune_reg,
1748 MSDC_PAD_TUNE_DATRRDLY, i);
1749 ret = mmc_send_tuning(mmc, opcode, NULL);
1751 fall_delay |= (1 << i);
1753 final_fall_delay = get_best_delay(host, fall_delay);
1756 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
1757 if (final_maxlen == final_rise_delay.maxlen) {
1758 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1759 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1760 sdr_set_field(host->base + tune_reg,
1761 MSDC_PAD_TUNE_DATRRDLY,
1762 final_rise_delay.final_phase);
1763 final_delay = final_rise_delay.final_phase;
1765 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1766 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1767 sdr_set_field(host->base + tune_reg,
1768 MSDC_PAD_TUNE_DATRRDLY,
1769 final_fall_delay.final_phase);
1770 final_delay = final_fall_delay.final_phase;
1773 dev_dbg(host->dev, "Final data pad delay: %x\n", final_delay);
1774 return final_delay == 0xff ? -EIO : 0;
1777 static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
1779 struct msdc_host *host = mmc_priv(mmc);
1781 u32 tune_reg = host->dev_comp->pad_tune_reg;
1783 if (host->hs400_mode &&
1784 host->dev_comp->hs400_tune)
1785 ret = hs400_tune_response(mmc, opcode);
1787 ret = msdc_tune_response(mmc, opcode);
1789 dev_err(host->dev, "Tune response fail!\n");
1792 if (host->hs400_mode == false) {
1793 ret = msdc_tune_data(mmc, opcode);
1795 dev_err(host->dev, "Tune data fail!\n");
1798 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
1799 host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
1800 host->saved_tune_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
1804 static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios)
1806 struct msdc_host *host = mmc_priv(mmc);
1807 host->hs400_mode = true;
1809 writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE);
1810 /* hs400 mode must set it to 0 */
1811 sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS);
1812 /* to improve read performance, set outstanding to 2 */
1813 sdr_set_field(host->base + EMMC50_CFG3, EMMC50_CFG3_OUTS_WR, 2);
1818 static void msdc_hw_reset(struct mmc_host *mmc)
1820 struct msdc_host *host = mmc_priv(mmc);
1822 sdr_set_bits(host->base + EMMC_IOCON, 1);
1823 udelay(10); /* 10us is enough */
1824 sdr_clr_bits(host->base + EMMC_IOCON, 1);
1827 static const struct mmc_host_ops mt_msdc_ops = {
1828 .post_req = msdc_post_req,
1829 .pre_req = msdc_pre_req,
1830 .request = msdc_ops_request,
1831 .set_ios = msdc_ops_set_ios,
1832 .get_ro = mmc_gpio_get_ro,
1833 .get_cd = mmc_gpio_get_cd,
1834 .start_signal_voltage_switch = msdc_ops_switch_volt,
1835 .card_busy = msdc_card_busy,
1836 .execute_tuning = msdc_execute_tuning,
1837 .prepare_hs400_tuning = msdc_prepare_hs400_tuning,
1838 .hw_reset = msdc_hw_reset,
1841 static void msdc_of_property_parse(struct platform_device *pdev,
1842 struct msdc_host *host)
1844 of_property_read_u32(pdev->dev.of_node, "mediatek,latch-ck",
1847 of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay",
1848 &host->hs400_ds_delay);
1850 of_property_read_u32(pdev->dev.of_node, "mediatek,hs200-cmd-int-delay",
1851 &host->hs200_cmd_int_delay);
1853 of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-cmd-int-delay",
1854 &host->hs400_cmd_int_delay);
1856 if (of_property_read_bool(pdev->dev.of_node,
1857 "mediatek,hs400-cmd-resp-sel-rising"))
1858 host->hs400_cmd_resp_sel_rising = true;
1860 host->hs400_cmd_resp_sel_rising = false;
1863 static int msdc_drv_probe(struct platform_device *pdev)
1865 struct mmc_host *mmc;
1866 struct msdc_host *host;
1867 struct resource *res;
1870 if (!pdev->dev.of_node) {
1871 dev_err(&pdev->dev, "No DT found\n");
1875 /* Allocate MMC host for this device */
1876 mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev);
1880 host = mmc_priv(mmc);
1881 ret = mmc_of_parse(mmc);
1885 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1886 host->base = devm_ioremap_resource(&pdev->dev, res);
1887 if (IS_ERR(host->base)) {
1888 ret = PTR_ERR(host->base);
1892 ret = mmc_regulator_get_supply(mmc);
1896 host->src_clk = devm_clk_get(&pdev->dev, "source");
1897 if (IS_ERR(host->src_clk)) {
1898 ret = PTR_ERR(host->src_clk);
1902 host->h_clk = devm_clk_get(&pdev->dev, "hclk");
1903 if (IS_ERR(host->h_clk)) {
1904 ret = PTR_ERR(host->h_clk);
1908 /*source clock control gate is optional clock*/
1909 host->src_clk_cg = devm_clk_get(&pdev->dev, "source_cg");
1910 if (IS_ERR(host->src_clk_cg))
1911 host->src_clk_cg = NULL;
1913 host->irq = platform_get_irq(pdev, 0);
1914 if (host->irq < 0) {
1919 host->pinctrl = devm_pinctrl_get(&pdev->dev);
1920 if (IS_ERR(host->pinctrl)) {
1921 ret = PTR_ERR(host->pinctrl);
1922 dev_err(&pdev->dev, "Cannot find pinctrl!\n");
1926 host->pins_default = pinctrl_lookup_state(host->pinctrl, "default");
1927 if (IS_ERR(host->pins_default)) {
1928 ret = PTR_ERR(host->pins_default);
1929 dev_err(&pdev->dev, "Cannot find pinctrl default!\n");
1933 host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs");
1934 if (IS_ERR(host->pins_uhs)) {
1935 ret = PTR_ERR(host->pins_uhs);
1936 dev_err(&pdev->dev, "Cannot find pinctrl uhs!\n");
1940 msdc_of_property_parse(pdev, host);
1942 host->dev = &pdev->dev;
1943 host->dev_comp = of_device_get_match_data(&pdev->dev);
1945 host->src_clk_freq = clk_get_rate(host->src_clk);
1946 /* Set host parameters to mmc */
1947 mmc->ops = &mt_msdc_ops;
1948 if (host->dev_comp->clk_div_bits == 8)
1949 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 255);
1951 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 4095);
1953 mmc->caps |= MMC_CAP_ERASE | MMC_CAP_CMD23;
1954 /* MMC core transfer sizes tunable parameters */
1955 mmc->max_segs = MAX_BD_NUM;
1956 mmc->max_seg_size = BDMA_DESC_BUFLEN;
1957 mmc->max_blk_size = 2048;
1958 mmc->max_req_size = 512 * 1024;
1959 mmc->max_blk_count = mmc->max_req_size / 512;
1960 if (host->dev_comp->support_64g)
1961 host->dma_mask = DMA_BIT_MASK(36);
1963 host->dma_mask = DMA_BIT_MASK(32);
1964 mmc_dev(mmc)->dma_mask = &host->dma_mask;
1966 host->timeout_clks = 3 * 1048576;
1967 host->dma.gpd = dma_alloc_coherent(&pdev->dev,
1968 2 * sizeof(struct mt_gpdma_desc),
1969 &host->dma.gpd_addr, GFP_KERNEL);
1970 host->dma.bd = dma_alloc_coherent(&pdev->dev,
1971 MAX_BD_NUM * sizeof(struct mt_bdma_desc),
1972 &host->dma.bd_addr, GFP_KERNEL);
1973 if (!host->dma.gpd || !host->dma.bd) {
1977 msdc_init_gpd_bd(host, &host->dma);
1978 INIT_DELAYED_WORK(&host->req_timeout, msdc_request_timeout);
1979 spin_lock_init(&host->lock);
1981 platform_set_drvdata(pdev, mmc);
1982 msdc_ungate_clock(host);
1985 ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq,
1986 IRQF_TRIGGER_LOW | IRQF_ONESHOT, pdev->name, host);
1990 pm_runtime_set_active(host->dev);
1991 pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY);
1992 pm_runtime_use_autosuspend(host->dev);
1993 pm_runtime_enable(host->dev);
1994 ret = mmc_add_host(mmc);
2001 pm_runtime_disable(host->dev);
2003 platform_set_drvdata(pdev, NULL);
2004 msdc_deinit_hw(host);
2005 msdc_gate_clock(host);
2008 dma_free_coherent(&pdev->dev,
2009 2 * sizeof(struct mt_gpdma_desc),
2010 host->dma.gpd, host->dma.gpd_addr);
2012 dma_free_coherent(&pdev->dev,
2013 MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2014 host->dma.bd, host->dma.bd_addr);
2021 static int msdc_drv_remove(struct platform_device *pdev)
2023 struct mmc_host *mmc;
2024 struct msdc_host *host;
2026 mmc = platform_get_drvdata(pdev);
2027 host = mmc_priv(mmc);
2029 pm_runtime_get_sync(host->dev);
2031 platform_set_drvdata(pdev, NULL);
2032 mmc_remove_host(host->mmc);
2033 msdc_deinit_hw(host);
2034 msdc_gate_clock(host);
2036 pm_runtime_disable(host->dev);
2037 pm_runtime_put_noidle(host->dev);
2038 dma_free_coherent(&pdev->dev,
2039 2 * sizeof(struct mt_gpdma_desc),
2040 host->dma.gpd, host->dma.gpd_addr);
2041 dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2042 host->dma.bd, host->dma.bd_addr);
2044 mmc_free_host(host->mmc);
2050 static void msdc_save_reg(struct msdc_host *host)
2052 u32 tune_reg = host->dev_comp->pad_tune_reg;
2054 host->save_para.msdc_cfg = readl(host->base + MSDC_CFG);
2055 host->save_para.iocon = readl(host->base + MSDC_IOCON);
2056 host->save_para.sdc_cfg = readl(host->base + SDC_CFG);
2057 host->save_para.pad_tune = readl(host->base + tune_reg);
2058 host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT);
2059 host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1);
2060 host->save_para.patch_bit2 = readl(host->base + MSDC_PATCH_BIT2);
2061 host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE);
2062 host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
2063 host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0);
2064 host->save_para.emmc50_cfg3 = readl(host->base + EMMC50_CFG3);
2065 host->save_para.sdc_fifo_cfg = readl(host->base + SDC_FIFO_CFG);
2068 static void msdc_restore_reg(struct msdc_host *host)
2070 u32 tune_reg = host->dev_comp->pad_tune_reg;
2072 writel(host->save_para.msdc_cfg, host->base + MSDC_CFG);
2073 writel(host->save_para.iocon, host->base + MSDC_IOCON);
2074 writel(host->save_para.sdc_cfg, host->base + SDC_CFG);
2075 writel(host->save_para.pad_tune, host->base + tune_reg);
2076 writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT);
2077 writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1);
2078 writel(host->save_para.patch_bit2, host->base + MSDC_PATCH_BIT2);
2079 writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE);
2080 writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE);
2081 writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0);
2082 writel(host->save_para.emmc50_cfg3, host->base + EMMC50_CFG3);
2083 writel(host->save_para.sdc_fifo_cfg, host->base + SDC_FIFO_CFG);
2086 static int msdc_runtime_suspend(struct device *dev)
2088 struct mmc_host *mmc = dev_get_drvdata(dev);
2089 struct msdc_host *host = mmc_priv(mmc);
2091 msdc_save_reg(host);
2092 msdc_gate_clock(host);
2096 static int msdc_runtime_resume(struct device *dev)
2098 struct mmc_host *mmc = dev_get_drvdata(dev);
2099 struct msdc_host *host = mmc_priv(mmc);
2101 msdc_ungate_clock(host);
2102 msdc_restore_reg(host);
2107 static const struct dev_pm_ops msdc_dev_pm_ops = {
2108 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
2109 pm_runtime_force_resume)
2110 SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL)
2113 static struct platform_driver mt_msdc_driver = {
2114 .probe = msdc_drv_probe,
2115 .remove = msdc_drv_remove,
2118 .of_match_table = msdc_of_ids,
2119 .pm = &msdc_dev_pm_ops,
2123 module_platform_driver(mt_msdc_driver);
2124 MODULE_LICENSE("GPL v2");
2125 MODULE_DESCRIPTION("MediaTek SD/MMC Card Driver");